Yindi specializes in high pressure die casting aluminum alloys and zinc alloy die casting company since1996. Our innovative internal structure allows us to be competitive at price and quality. We strictly adherence to our ISO9001:2008 Process Control and Monitoring Procedures to ensure superior quality. We provide precision cnc machining services and aluminium pressure die casting service for companies in a wide range of applications.

The list of die-casting machine

DM1250 DM900 DM650 DM500 DM500H DM300 DM180 DY168 YT200


As a die casting manufacturer, Yindi equipped with 13 sets of automatic cold chamber die casting machines from 160 to 1250 tons in die casting manufacturer. Die casting center is already equipped by higher automatic production. Each machine has function of automatic feeding, spraying and picking(robot is used for large machine), which improve the stability of prodution process highly, and ensure stable quality and higher effciency. 2central continuous melting furnaces and 4graphite crucible melting furnaces arefv equipped for aluminium pressure die casting work shop. Currently the largest melting capcity can be up to 3T alu. liquid per hour. We have the advanced die casting technology to refine and degas makes the melted alu. liquid totally meet relevant material requirement, and eusure product quality and performance. Mainly Yizumi and Toshiba die casting machines.

Cold chamber die casting machine are more suitable for alloys with high melting points and cannot be cast in hot chamber machines as aluminium die casting can damage the pump system. During cold chamber aluminium pressure die casting, the metal is liquefied and then pulled into the cold chamber, where a hydraulically driven plunger forces the molten metal through the jet chamber and into the jet sleeve in the mold. Typical injection pressures for cold chamber die casting machines are 2000 to 2000 psi. After the molten metal is injected into the cavity, the plunger remains forward, maintaining pressure as the casting solidifies. After solidification, the hydraulic system retract the plunger and the parts can be ejected by the clamping unit. As a die casting manufacturer, Yindi can supply you the high quality, high efficiency die casting service.


Aluminum Die Casting
Aluminum pressure die casting is a metal casting process, which is characterized by applying high pressure to the molten metal using the mold cavity. Molds are usually machined from stronger alloys, a process similar to injection molding. Most die castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys and their alloys. Depending on the type of die casting, a cold chamber die casting machine or a hot chamber die casting machine is required.

The cost of foundry equipment and molds is high to most aluminum die casting companies and aluminum die casting manufacturers, so the die casting process is generally only used to manufacture a large number of aluminum die casting products. It is relatively easy to manufacture die-cast parts, which generally only requires four main steps, and the single cost increase is very low. Aluminum pressure die casting is particularly suitable for manufacturing a large number of small and medium-sized castings, so die casting is the most widely used in various casting processes. Compared with other casting technologies, the surface of die casting is flatter and has higher dimensional consistency.

Based on the traditional die casting process, several improved processes have been invented for custom die casting service, including a non-porous die casting process that reduces casting defects and eliminates pores. The direct injection process mainly used for processing zinc, which can reduce waste and increase yield. There are also new die-casting technologies such as precision and dense die-casting technology invented by General Dynamics and semi-solid die-casting for aluminum die casting service. There are many well-known suppliers in China that are occupied in producing good quality aluminum high pressure die casting and aluminum die casting mold.

Ningbo Changxing Die-casting Co., Ltd., founded in 1997, specializes in die casting and processing of aluminum alloy products. The company has advanced and complete processing machinery and equipment, strong production capacity, multiple die-casting machines, and vacuum pumping technology. Subsequent processing machinery includes imported CNC computer lathes, machining centers and sandblasting machines, discharge machines, milling machines, drilling machines, etc. At the same time, to control and guarantee the product quality, the company has a precision material analysis spectrometer, the image measuring instrument and other testing equipment and instruments. It can meet different requirements and the production of different types of products. To ensure the efficient operation of the enterprise and meet the needs of customers, the company passed the ISO9002 quality management system certification in 1999 and the ISO9001: 2000 version of the quality management system certification in 2002. It continued to develop and improve, and has passed the ISO9001: 2008 quality management system certification.
Suzhou Tongmeng Yang Zheng Precision Manufacturing Technology Co., Ltd. is located in Fengdian Road Industrial Park, Beiqiao Street, Xiangcheng District, and Suzhou City. It is close to the S9 highway and the Suyuzhang Expressway and has convenient transportation. The company specializes in the research and development, manufacturing and sales of aluminum alloy and zinc alloy die casting parts for home voltage castings, automotive die castings, medical, communications and hardware molds.

Established a high starting point, it is oriented to high-end and high-quality customers and strives to become a leader in the industry on the premise of first-class quality and sound service mechanisms. The company covers an area of 8,600 square meters and a building area of 6,000 square meters. It has obtained ISO certification from Beijing Zhonglian. The factory has 16 advanced automatic 280T-1000T domestic third-generation die-casting machines, 12 CNC lathes, 18 machining centers, and dozens of other post-processing equipment. It is also equipped with multiple precision measurement equipments. The annual production capacity is about 180 million Yuan.

All suppliers adhere to the business purpose of "quality determines development, management determines the future".
Aluminum Die Casting Application
The use of a substance depends largely on the nature of the substance. Because aluminum has many excellent properties, aluminum has a very wide range of uses such as aluminum die casting for LED lighting, aluminum die casting for furniture industry, aluminum die casting for mechanical parts and so on.

Aluminum and aluminum alloys are currently one of the most widely used and most economically applicable materials. The world's aluminum output has surpassed the copper output since 1956 and has always been the first in non-ferrous metals. The current production and consumption of aluminum (calculated in ton) is second only to steel and has become the second-largest metal used by humans. Moreover, aluminum is very rich in resources. According to preliminary calculations, the mineral reserves of aluminum account for more than 8% of the crustal constituents. Aluminum's lightweight and corrosion resistance are two outstanding characteristics of its performance.

The density of aluminum is very small, only 2.7 g / cm³. Although it is relatively soft, it can be made into various aluminum alloys, such as hard aluminum, super-hard aluminum, rust-proof aluminum, cast aluminum for valve pump aluminum die casting, auto parts aluminum die casting, auto parts aluminum die casting for home appliance industry and etc. These aluminum alloys are widely used in aircraft, automobile, train, ship, and other manufacturing industries. Besides, space rockets, space shuttles, and satellites also use a large amount of aluminum and aluminum alloys. For example, a supersonic aircraft consists of about 70% aluminum and its aluminum alloy. Ships also use a large amount of aluminum, and a large passenger ship often uses thousands of tons of aluminum. The conductivity of aluminum is second only to silver, copper, and gold. Although its conductivity is only 2/3 of copper, its density is only 1/3 of copper, so the same amount of electricity is transmitted. The quality of the aluminum wire is only half that of copper wire. The oxide film on the aluminum surface not only can resist corrosion but also has a certain degree of insulation, so aluminum has a wide range of uses in the electrical appliance manufacturing industry, wire and cable industry and radio industry.

Aluminum is a good conductor of heat, and its thermal conductivity is three times greater than that of iron. Industrially, aluminum can be used to make various heat exchangers, heat dissipation materials and cookers.

Aluminum has good ductility (its ductility is second only to gold and silver), and it can be made into aluminum foil thinner than 0.01 mm at 100 ℃ ~ 150 ℃. These aluminum foils are widely used for packaging cigarettes, candies, etc. They can also be made into aluminum wires and bars and can be rolled into various aluminum products. Due to the dense oxide protective film on the surface of aluminum, aluminum is not easy to be corroded. It is often used to make valve pump aluminum die casting, auto parts aluminum die casting, auto parts aluminum die casting for home appliance industry. Aluminum powder has a silvery-white luster (generally, the color of the metal in powder is mostly black). It is commonly used as a coating, commonly known as silver powder and silver paint, to protect iron products from corrosion and for decoration.

Aluminizing agents are commonly used to smelt refractory metals and weld rails. Aluminum is also used as a deoxidizer in steelmaking. Aluminum powder, graphite, titanium dioxide (or other high melting point metal oxides) are uniformly mixed at a certain ratio, coated on the metal, and claimed at high temperature to make high-temperature resistant cermet. It has important applications in rocket and missile technology.

When the temperature is low, aluminum will increase its strength without brittleness. Therefore, it is ideal for low-temperature device materials, such as aluminum die casting for LED lighting, aluminum die casting for furniture industry, aluminum die casting for mechanical parts.
Performance And Application Of Aluminum Die Casting Tooling
Aluminum die casting tooling has some advantages that cannot be copied by the tooling made of other materials, such as the appearance of aluminum die casting tooling is very beautiful, its quality is very light, it has the feature of corrosion resistance and other advantages. All these features mentioned above make it popular with users. Especially since the automobile lightweight, the aluminum die casting tooling have been widely used in the automobile industry.

First of all, let’s get to know some background about the process of aluminum die casting tooling. As you may know, aluminum alloy refining is mainly to remove gas and non-metallic inclusions in alloy solution. The gas in aluminum alloy is mainly hydrogen, and the inclusions are mainly alumina. Because the saturation solubility of hydrogen in liquid and solid aluminum alloys is nearly 20 times different, it is easy to precipitate hydrogen during solidification of aluminum alloy, which makes the castings produce pinholes. Inclusions and gases are interacting. When the hydrogen content in every 100 g aluminum alloy solution in industrial pure aluminum is higher than 0.1 mL, there will be pores. When the hydrogen content is up to 0.4 mL per 100 g aluminum alloy solution in high purity aluminum, the pores will appear. It can be seen that degassing must be slag removal, and slag removal is the basis of degassing.

Based on the information above, we can draw a conclusion that the density of aluminum die casting tooling is smaller than that of iron die casting and steel die casting, but the specific strength is much higher. Therefore, the weight of the structure can be reduced by using aluminum die casting tooling under the same load. Therefore, aluminum die casting tooling is widely used in aviation industry, power machinery and transportation machinery manufacturing and so forth. Aluminum die casting tooling has good surface luster and good corrosion resistance in atmosphere and fresh water, so it has a wide range of applications in the manufacture of civil utensils. Pure aluminum has good corrosion resistance in oxidizing acid media such as nitric acid and acetic acid, so aluminum die casting tooling also has certain applications in chemical industry. Because pure aluminum and aluminum alloy have good thermal conductivity, the heat exchange device used in chemical production is suitable for making of aluminum alloy. At the same time, parts with good thermal conductivity, such as cylinder head and piston of internal combustion engine, are also suitable for manufacturing with aluminum alloy.

aluminum die casting tooling has good casting properties. Because the melting point of aluminum alloy die casting is low, the melting point of pure aluminum is 660.230C, and the pouring temperature of aluminum alloy is about 730-750oC, so the casting methods such as metal type and pressure casting can be widely used. Through this method, the internal quality, dimensional accuracy, surface finish and production efficiency of the aluminum die casting tooling can be improved. due to the large latent heat of solidification of aluminum alloy, under the same weight, the solidification process duration of aluminum liquid is much longer than that of cast steel and cast iron, and the fluidity is good, which is beneficial to casting thin-walled and complex castings.
Aluminum Die Casting Advantages And Disadvantages
Look around, there are a lot of aluminum equipment including household items and building structures, all of which are directly or indirectly connected with aluminum die casting. Here we introduce to you the advantages and disadvantages of the process.

On the one hand, the advantages of die casting include excellent dimensional accuracy of the casting. Usually, this depends on the casting material. The typical value is 0.1 mm error at the initial 2.5 cm size, and the error increases by 0.002 mm for each additional 1 cm. Compared with other casting processes, its casting surface is smooth, and the corner radius is about 1-2.5 microns. Compared to sandbox or permanent mold casting, castings with a wall thickness of approximately 0.75 mm can be produced. It can directly cast internal structures, such as wire jackets, heating elements, and high-strength bearing surfaces. Some other advantages include that it can reduce or avoid secondary machining, has fast production speed, a tensile strength of castings up to 415 MPa, and can cast high fluidity metals.

So much for the credit part, the biggest disadvantage of aluminum die casting is the high cost. Casting equipment and molds, mold-related components are expensive compared to other casting methods. Therefore, it is more economical to produce a large number of products when manufacturing aluminum die castings. Other disadvantages include: this process is only suitable for highly fluid metals, and the casting quality must be between 30 grams and 10 kg. In ordinary aluminum die casting, the last batch of castings will always have porosity. Therefore, no heat treatment or welding can be performed, because the gas in the gap will expand under the effect of heat, which will cause internal micro defects and surface peeling.

Many factors cause mold failure, including external factors (such as the casting temperature, whether the mold has been preheated, the amount of water-based paint sprayed, whether the tonnage of the aluminum die casting machine is matched, the aluminum die casting pressure is too high, the gate speed is too fast, and the cooling water opening is not synchronized with the production of aluminum die casting, the type of casting material and the level of Fe, the size and shape of the casting, the thickness of the wall, the type of coating, etc.). There are also internal causes (such as the metallurgical quality of the material of the mold itself, the forging process of the billet, the rationality of the mold structure design, the rationality of the design of the pouring system, the internal stress generated during the processing of the mold machine (electric processing), the heat treatment process of the mold, including all kinds of coordination accuracy and finish requirements, etc.). If the mold fails early, it is necessary to find out which internal or external causes are to be improved in the future. However, in actual production, dissolution is only a local part of the mold. For example, the parts directly washed (core, cavity) are prone to dissolution, and aluminum alloy sticky molds are prone to appear at softer hardness.
Aluminum Die Casting Industry And Factory In China
Aluminum die casting service suppliers rationally design die-casting parts, simplify the structure of die-casting molds, reduce the cost of die-casting, reduce defects in die-casting parts, and improve the quality of parts on the premise of meeting product functions. Because the injection molding process is derived from the casting process, the design guidelines for die castings are very similar to the design guidelines for plastic parts in some respects. For detailed die-casting part design, please refer to the book "Guide to Design for Manufacturing and Assembly Products" published by Mechanical Industry Press.

Casting drawings are often marked with requirements such as no rounded corners R2. When molding, aluminum die casting service suppliers would not ignore the role of these rounded corners, or make undercut or too small rounded corners. The casting fillet can make the metal liquid fill smoothly, the gas in the cavity can be discharged in sequence, and it can reduce the stress concentration and prolong the service life of the mold. (It is also not easy for cracks to appear in the casting or various defects due to irregular filling). For example, there are many upper corners of standard oil pan molds. Relatively speaking, oil pan molds the best, and there are more heavy oil pans.

In the demanding direction, undercuts caused by humans are strictly prohibited (often the casting is stuck in the mold when the mold is tested, and when it is handled in an incorrect way, such as drilling, hard chiseling, etc. to make the part concave). To aluminum die casting service suppliers, the molding part and the pouring system should be polished carefully according to the requirements, and they should be polished along the direction of demanding. Because the metal liquid enters the pouring system from the pressure chamber and fills the cavity, the entire process takes only 0.01-0.2 seconds. To reduce the resistance to the flow of the metal liquid and minimize the pressure loss, it is necessary to have a high smoothness across the surface. At the same time, the heating and erosion conditions of the gating system are relatively poor. The worse the finish, the more vulnerable the mold is.

The hardness of the mold forming part of aluminum alloy is about HRC46 ° and copper is about HRC38 °. When processing, the mold should leave as much as possible for repair, make the upper limit of the size, and avoid welding.

Flow ability refers to the ability of an alloy liquid to fill a mold. The degree of fluidity determines whether the alloy can cast complex castings. The eutectic alloy has the best fluidity among aluminum alloys. Many factors affect fluidity, mainly the composition, temperature, and solid-phase particles of metal oxides, metal compounds and other pollutants in the alloy liquid, but the external fundamental factors are the pouring temperature and pouring pressure (commonly known as pouring head) High and low.

In actual production, when the alloy has been determined by aluminum die casting service suppliers, in addition to strengthening the melting process (refining and slag removal), it is necessary to improve the molding process ability (sand mold permeability, metal mold exhaust, and temperature) without affecting the mold. On the premise of casting quality, increase the pouring temperature to ensure the fluidity of the alloy.

Die-casting machine, die-casting alloy, and die-casting die are the three major elements of die-casting production. The so-called die-casting process is an organic and comprehensive use of these three elements, which can stably and efficiently produce qualified castings, even high-quality castings that have an appearance, good internal quality, and dimensions that meet the requirements of the drawing or agreement.
From What Sources Can Aluminum Die Casting Quality Control Be Controlled
With the continuous development and application of new technology and new materials in die casting industry, aluminum die castings are everywhere in life. Due to the characteristics of die casting production, the quality of aluminum die castings is affected by its production, management, mold, die casting process and other technology. If the quality control is not good, the scrap rate of die casting will be very high, which will cause the waste of manpower, material and financial resources, and seriously affect the economic benefits and product quality. From what sources can aluminum die casting quality control be controlled?

First of all, for aluminum die casting, in order to improve the quality, it is necessary to improve the qualified rate of production. Raw materials are fundamental, so they should be the top priority of aluminum die casting quality control. When selecting raw materials, the quality should be strictly checked, and the chemical composition of the main elements of the alloy should be determined by sampling inspection, and the corresponding acceptance should be carried out. Generally speaking, if the content of iron in alloy structure is too much, the quality of castings will be greatly affected, because it will lead to cracks and greatly decrease the plasticity of castings.

However, if the iron content is too small, it will lead to mucous membrane, difficult demoulding and other problems, so it is necessary to control the iron content reasonably. It is necessary to attach great importance to the content of copper in aluminum die castings. Properly increasing the content of copper can improve the flowability of the alloy and the strength and hardness of the castings. If the content of copper is too high, it will also lead to the decrease of plasticity of castings, and the possibility of hot crack is higher, which is not conducive to subsequent processing, so the content of copper should also be controlled.

In aluminum die castings, the iron in the alloy can be changed into a fine crystal shape by proper manganese content, and the adverse effect of iron on the alloy can be reduced. It is necessary to control manganese content properly. Because, if the manganese content exceeds the standard, it may cause segregation problem. Therefore, if kept within a reasonable range, the plasticity of castings can be improved. Zinc can improve the flowability and machinability of the alloy, and the content should not be too high, otherwise it will lead to cracks in the castings. Silicon can improve the modeling of aluminum alloy at high temperature, and the properties of castings can be further improved by controlling the content of silicon, otherwise the machining effect of castings will be poor. In addition, raw materials such as material head and so on also need to be attached great importance to.

In particular, the materials that need to be returned to the furnace should be strictly controlled and cleaned so that they can be used twice and will not pollute the new materials. The ratio of return charge to new material should not exceed 1/3, otherwise the aluminum die casting quality control will be affected.
Do You Know How To Operate The Aluminum Die Casting Machining?
Aluminum die casting machining is a machine for pressure casting. Aluminum die casting machining includes hot-pressing chamber and cold-pressing chamber, furthermore, it also can be divided into two types: straight aluminum die casting machining and horizontal aluminum die casting machining. The aluminum die casting machining injects the molten metal hydraulically into the mold to cool the molding under the action of pressure. After the mold opening, the solid aluminum casting can be obtained, which is initially used for die casting lead type. With the progress of science and technology and industrial production, especially with the development of automobile, motorcycle and household appliances, aluminum die casting technology has been developed extremely rapidly and brings the aluminum die casting machining to a brand-new level.

Aluminum die casting machining is composed of seven parts. One is the molding mechanism. When the mold is closed, it has enough ability to lock the mold to ensure that the mold parting surface will not expand in the process of pressing and filling. The second is the firing mechanism. It pushes the chamber’s metallic fluid at a specified rate and has sufficient energy to fill the mold cavity by flowing through the mold’s pouring channels and internal openings. subsequently, it can maintain a certain pressure transfer to the metal liquid that is solidifying until the die casting is formed. After the pressing action is complete, the pressing head returns to reset. The third is the hydraulic system. It can provide enough power and energy for the operation of the die casting machine. The fourth is the electrical control system. It can control the execution action of each mechanism of the aluminum die casting machining to run according to the predetermined program. The fifth is spare parts and machine seat. All parts are combined and assembled to form the aluminum die casting machining as a whole and are fixed on the seat. Sixth, other devices, advanced Aluminum die casting machining is usually with parameter detection, fault alarm, die casting process monitoring, computer-aided production information storage, printing and management system, etc. Finally, the auxiliary device. It is based on the degree of automation equipped with castable, spray, pick-up and other devices.

After knowing the basic information about the aluminum die casting machining, let’s get know how to operate it properly and safely. First of all, before starting the motor, put the handle of the pressure relief valve at the pressure relief position, and release the pressure relief valve handle after the motor operates normally. Second of all, before pressing, the model must be heated to a specified temperature before the metal solution can be pressed in. Third of all, protective baffle shall be used at the contact between the mold parting surface and the gate, and the operator must wear protective glasses. The operator shall not stand opposite the contact of the parting surface in order to prevent metal liquid splashing from injury. Fourth of all, do not bring open fire near the fuel tank. When the oil tank temperature exceeds the specified operating temperature of the equipment, water shall be used for cooling. Fifth of all, use tools when removing castings and risers from die casting die. After the casting is removed, the metal debris adhered to the mold and in the vent shall be removed in time. The last but not the lease, when the work is completed, stop the oil pump and close all valves. If the heat preservation furnace is adopted to insulate the metal liquid, the power supply shall be turned off and the ventilation equipment on the insulation furnace shall be stopped.
A Brief Introduction About Aluminum Die Casting Finishing
The surface technology of aluminum die casting finishing is rich and diverse. Due to the unique advantage of Aluminum die casting finishing, the surface effect of aluminum die castings is very beautiful, and the surface effect is incomparable.

Taking the alkaline electrolytic polishing process of aluminum alloy die castings for example, through the study of alkaline polishing solution system, the effect of corrosion inhibitor and viscosity agent on polishing effect is compared, and a very good alkaline solution system is successfully obtained. At the same time, through the experiment, the additives which can reduce the operating temperature, prolong the service life of the solution and improve the polishing effect were obtained for the first time. Using pulse electropolishing method can achieve the leveling effect of voltage electropolishing, but its leveling speed is slow. For your better understanding about aluminum die casting finishing, let’s get to know the environment friendly chemical polishing of aluminum die casting.

A new environment friendly chemical polishing technology based on phosphate monosulfuric acid should realize zero emission of NOx and overcome the quality defects of similar technologies. The key to the new technology is to add some special compounds to the base solution instead of nitric acid. Therefore, it is necessary to analyze the chemical polishing process of aluminum triacid, especially the effect of nitric acid. The main function of nitric acid in aluminum chemical polishing is to inhibit point corrosion and improve polishing brightness. Combined with the chemical polishing test in phosphate-sulfuric acid alone, the special substances added to phosphate-sulfuric acid can inhibit the point corrosion and slow down the overall corrosion, and at the same time, the aluminum die casting finishing can also have a good leveling and bright effect.

After getting to know the basic information about the aluminum die casting finishing, here comes the question, do you know how to do the aluminum die casting finishing? Take deburring as an example, the casting deburring treatment can be manual, but manual deburring polishing treatment usually takes a few hours to complete, it is of very low efficiency. Therefore, the current deburring and polishing of aluminum die castings generally use aluminum die casting finishing deburring treatment equipment. Aluminum die casting finishing deburring treatment equipment using the force of the magnetic field to produce high-frequency rotation, vibration, scratching over the surface of the workpiece, which can play a very good cleaning of castings, deburring, grinding and other precision polishing role.

Aluminum die casting finishing deburring processing equipment can batch workpiece polishing treatment, after finishing polishing, it can be separated by screen batch and steel needle, which greatly improves the working efficiency and effect. Aluminum die casting finishing deburring processing equipment, especially for small hardware, small jewelry and other dead angle, is the perfect solution due to the fact that the inner hole treatment effect is excellent. It can achieve the removal of dust and burrs, improve the brightness of the product surface. At present, Aluminum die casting finishing deburring processing equipment is generally used.
Some Knowledge About Materials For Die Casting Process
When selecting die-casting materials, mechanical engineers shall reasonably select the correct die-casting materials according to various factors such as the action performance, process performance, production conditions, economy and the characteristics of die-casting materials. Commonly used mechanical materials for die casting process include aluminum alloy, zinc alloy and magnesium alloy and so on. Aluminum alloy is the most widely used die-casting material, especially widely used in automobile industry, motorcycle industry, aerospace and so on.

First of all, as for aluminum alloy, the density of it is small, only about 1/3 of iron, copper and zinc, and its outstanding advantages are high specific strength and specific stiffness. Aluminum alloy has good electrical conductivity and thermal conductivity. The oxidation resistance of aluminum alloy is good. In the air, the surface of aluminum is easy to form a dense sulfur trioxide oxide film, which can prevent further oxidation. Aluminum alloy has good die casting performance. The aluminum alloy has the advantages of simple die casting process, good forming and cutting performance, high mechanical properties and corrosion resistance. The high temperature mechanical properties of aluminum alloy are very good, and the mechanical properties are also maintained when working at low temperature. the disadvantage of aluminum alloy is that it is easy to produce large concentrated shrinkage holes at the final solidification. In addition, aluminum alloy has a strong affinity with iron and is easy to stick mold, so, it should be pressed on the cold chamber die casting machine.

Second of all, as for zinc alloy, it has excellent casting properties and is widely used in traditional mechanical parts, hardware, locks, toys and other industries. Zinc alloy has excellent electrical and heat conduction properties. Compared with aluminum alloy and magnesium alloy, zinc alloy has higher tensile strength, yield strength, impact toughness and hardness, and better elongation. The surface of zinc alloy die casting is very smooth, which can be used directly without surface treatment, and it is also easier to carry out all kinds of surface treatment. When the impurity elements lead, cadmium and tin in zinc alloy exceed the standard, they will gradually age and deform, which shows that the volume swell is large, the mechanical properties are significantly decreased, and the fracture will occur after a long time. Zinc alloy should not be used in high temperature and low temperature working environment. Zinc alloys have good mechanical properties at room temperature, but the tensile strength at high temperature and impact properties at low temperature are significantly decreased. Zinc alloy is easy to age, which is the main reason why the application range of zinc alloy is limited.

The last but not the least, as for magnesium alloy, it is called green engineering material of 21st century. Its density is 2/3 of aluminum alloy and 1/4 of steel, but the specific strength and specific stiffness are better than aluminum alloy and steel, which is much higher than that of engineering plastics, and it is an excellent and lightweight structural material. The magnesium alloy has good energy absorption and vibration absorption characteristics, which can be used in the product shell to reduce noise transmission, to absorb vibration of moving parts and to prolong the service life of parts. The magnesium alloy is easily oxidized in the air, and the magnesium alloy die casting must undergo surface treatment after forming to improve the corrosion resistance and improve the surface quality of the parts. Similarly, magnesium alloy has the disadvantages of high temperature brittleness and high thermal cracking tendency.
Aluminum Die Casting Process
The traditional aluminum die casting process is mainly composed of four steps, also known as high-pressure aluminum die casting. These four steps include mold preparation, filling, injection, and falling sand, which are also the basis of various improved versions of the aluminum die casting process. During the preparation process, a lubricant needs to be sprayed into the mold cavity. In addition to helping to control the temperature of the mold, the lubricant can also help to remove the casting from the mold. The mold can then be closed and the molten metal injected into the mold with high pressure, which ranges between 10 and 175 MPa. When the molten metal is filled, the pressure is maintained until the casting solidifies. Then the push rod will push out all the castings. Since there may be multiple cavities in a mold, multiple castings may be generated during each casting process. The process of falling sand requires the separation of residues, including mold openings, runners, gates, and flashes. This process is usually done by extruding the casting through a special trimming die. Other methods of falling sand include sawing and sanding. If the gate is fragile, you can directly hit the casting, which can save manpower. Excess mold openings can be reused after melting. The usual yield is about 67%.

The high-pressure injection causes the mold to be filled very quickly so that molten metal can fill the entire mold before any part solidifies. In this way, surface discontinuities can be avoided even for thin-walled portions that are difficult to fill. However, this also results in air stagnation, as it is difficult for air to escape when filling the mold quickly. This problem can be reduced by placing an exhaust port on the parting line, but even a very precise process can leave air holes in the center of the casting. Most die-casting can be completed by secondary processing to some structures that cannot be completed by casting, such as drilling and polishing.

Defects can be inspected after sand falling. The most common defects include stagnation (unsatisfactory pouring) and cold scars. These defects may be caused by the insufficient temperature of the mold or molten metal, impurities in the metal, too few vents, too much lubricant, etc. Other defects include porosity, shrinkage, thermal cracking, and flow marks. Flow marks are traces left on the casting surface due to gate defects, sharp corners, or excessive lubricant. What’s more, water-based lubricants are called emulsions and are the most common type of lubricant because of health, environmental, and safety considerations. Oils that can be used in lubricants include heavy oils, animal fats, vegetable fats, and synthetic oils. Heavy residual oil is highly viscous at room temperature, and it becomes a film at high temperatures during the die-casting process. Adding other substances to the lubricant can control the emulsion viscosity and thermal properties. These materials include graphite, aluminum, and mica. Other chemical additives prevent dust and oxidation. Emulsifiers can be added to water-based lubricants, so oil-based lubricants can be added to water, including soap, alcohol, and ethylene oxide.

For a long time, commonly used solvent-based lubricants include diesel and gasoline. They are good for casting out, but a small explosion occurs during each aluminum die casting process, which causes the accumulation of carbon elements on the cavity wall. Compared to water-based lubricants, solvent-based lubricants are more uniform.


GuangDong YinDi mold center has accomulated more than 20 years experience on mold design and manufacture, and educated many engineering technicians and mold designers with rich experience.

Currenty YinDi uses advanced mold flow simulation soft ware, as Cast-Designer. According to the result of mold flow simulation, the designers will keep optimizing R &D period, which will ensure and improve later mold quality.

There are total more than 20 sets of advanced mold manufacturing equipments, just like vertical CNC, EDM, wire cutting machine, processing equipment, die-spotting press, universal radial drill, plane grinder etc.

Mold casting system simulation analysis capability use the USA Cast-Designer flow analysis software for filling simulation analysis, improving flow system and per fecting mold designing.

Yindi provides assistance through early development stage. We are able to provide the technical die casting of considerations and suggestion consistent with customer demands. Prior to the tooling build stage. Our precision CNC machining services follow lean manufacturing principles and feature automation. Now YinDi has 13die-casting machines.

The dies into which the molten metal is injected are the custom die casting tooling used in this process. The dies are typically composed of two halves - the cover die, which is mounted onto a stationary platen, and the ejector die, which is mounted onto a movable platen. This design allows the die to open and close along it part line. Once closed, the two die halves form an internal part cavity which is filled with the molten metal to form the casting. This cavity is formed by two inserts, the cavity insert and the core insert, which are inserted into the cover die and ejector die, respectively. The cover die allows the molten metal to flow from the injection system, through an opening, and into the part cavity. The ejector die includes a support plate and the ejector box, which is mounted onto the platen and inside contains the ejection system. When the clamping unit separates the die halves, the clamping bar pushes the ejector plate forward inside the ejector box which pushes the ejector pins into the molded part, ejecting it from the core insert. Multiple-cavity dies are sometimes used, in which the two die halves form several identical part cavities.


Quality management system of first inspection, last inspection and process inspection is adopted during machining process. The inspection devices are CMM, all kinds of common used gauges(GO-NO GO gauge and thread plug gauge etc.), air gauge, general gauge etc.

SPC system is used for monitor and manage key features dimension of product process, and make statistics and analysis on key features dimension CPK periodically. The result will be used to improve and optimize machining production engineering, to ensure quality stability and production efficiency during process.

Precision cnc machining

Machining is a term used to describe the various material removal processes in which a cutter removes unwanted material from the workpiece to produce the desired shape.The workpiece is usually cut from a larger cutting board, which comes in a variety of standard shapes, such as flat plates, solid steel bars, hollow pipes, and irregular beams.Machining can also be done on existing parts, such as castings or forgings.

Machining as a material removal process is not the most economical option in primary manufacturing processes.The material, which has been paid for, is cut and discarded to reach the final part.In addition, although installation and tooling costs are low, they may require longer processing times, making the cost prohibitive for mass production.Therefore, machining is usually used in limited quantities, such as in other manufacturing processes that produce prototypes or custom tools.Machining is also often used for secondary processing, in which very little material is removed and the cycle is short.Due to the high tolerance and surface finish provided by machining, it is often used to add or refine the precision characteristics of existing parts, or to smooth the surface for good finish.

Yindi approaches each project with the mindset of minimizing the number of operations, to maximizing quality and increasing efficiency. We provide close tolerance CNC Milling, Drilling, Tapping and Turning on state-of-the-art CNC precision machining equipment.


Yindi equipped with 9 sets of CNC machines and 5 sets of lathes,mainly Hong Kong LK.

Our CNC Machines are both 3 & 4 Axis machining centers. All of our machining centers are set up to machine your aluminium die casting parts accurately and efficiently. With 3 & 4 Axis machining centers, we are able to machine a part in one or two operations, even more to reducing time and costs for the customer. And our lathes are able to produce tight tolerances on large production runs.

Currently YinDi has 41sets vertical CNCmachining equipments, with 1CNC turning center and 6CNC lathes. Most of them are the well-known brand in Tailand and Japan.

富大FMC-1160加工中心 2SETS
富大FMC-750加工中心 1SET
富大FMT-600加工中心 2SETS
力劲TC-1200加工中心 1SET
力劲MV-850加工中心 1SET
力劲TC-710加工中心 4SETS
巨冈CTL-800加工中心 1SET
佛威FMV-L850加工中心 1SET
兄弟加工中心 10SETS
加工中心 4SETS
数控车床 6SETS

Quality management system of first inspection, last inspection and process inspection is adopted during machining process. The inspection  devices are CMM, all kinds of common used gauge(GO-NO-GO gauge and thread pluggauge etc.), air gauge and general gauge etc.

SPC system is used for monitor and manage key features dimension of  product process, and make statistics and analysis on key features dimension CPK periodically. The result will be used to improve and optimize machining production engineering, to ensure quality stability and production efficiency during process.


Die casting is a metal casting process characterized by the application of high pressure to the molten metal through the die cavity. Molds are usually made of stronger alloys, a process somewhat similar to injection molding. Most die castings are iron free, such as zinc, copper, aluminum, magnesium, lead, tin and lead tin alloys and their alloys. According to the type of high pressure die casting, cold chamber die casting machine or hot chamber die casting machine is needed.1-13-31-2


The cost of foundry equipment and molds is high, so die casting techniques are generally used only for mass production. It is relatively easy to make die casting parts, which typically require only four major steps, with a low cost increment. Die casting technology is particularly suitable for the manufacture of a large number of small and medium-sized casting, so custom die casting is the most widely used of various casting processes. Compared with other casting techniques, die casting has a flatter surface and a higher dimensional consistency.

Aluminum Prototype Sampling

The normal produce progress is that we will make the pre-production sample for your quality evaluation. The mass production will be started after we get your confirmation on this sample.:After receiving the sample item and specification being confirmed, the sample time is 1-3 days and Express delivery usually needs around 3-4 day. We will offer all the service for your demands.

Die casting supplier using a metal casting process characterized by the application of high pressure to the molten metal through the die cavity. Molds are usually made of stronger alloys, a process somewhat similar to injection molding. Most die castings are iron free, such as zinc, copper, aluminum, magnesium, lead, tin and lead tin alloys and their alloys. According to the type of die casting, cold chamber die casting machine or hot chamber die casting machine is needed.


          The cost of foundry equipment and molds is high, so die casting techniques are generally used only for mass production. It is relatively easy to make pressure die casting parts, which typically require only four major steps, with a low cost increment. Die casting is particularly suitable for the manufacture of a large number of small and medium-sized casting, so die casting is the most widely used of various casting processes. Compared with other casting techniques, die casting has a flatter surface and a higher dimensional consistency.

Explain the die-casting 

Aluminium die casting is a metal casting process characterized by the application of high pressure to the molten metal through the die cavity. Molds are usually made of stronger alloys, a process somewhat similar to injection molding. Most die castings are iron free, such as zinc, copper, aluminum, magnesium, lead, tin and lead tin alloys and their alloys. According to the type of die casting, cold chamber die casting machine or hot chamber die casting machine is needed.


The cost of foundry equipment and molds is high, so die casting techniques are generally used only for mass production. It is relatively easy to make die-casting parts, which typically require only four major steps, with a low cost increment. Aluminum die casting services is particularly suitable for the manufacture of a large number of small and medium-sized casting, so die casting is the most widely used of various casting processes. Compared with other casting techniques, die casting has a flatter surface and a higher dimensional consistency.

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Guangdong Yindi Die-Casting Co.,Ltd.

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