Zinc Die Casting Service In China – Leading Zinc Alloy Die Casting Parts Manufacturer

Die-casting machine is the key equipment of die-casting production, and its performance determines the quality of die-casting parts objectively. The correct choice of die casting machine is crucial to ensuring product quality, improving production efficiency, reducing production costs and ensuring production safety. The performance of the die casting machine mainly depends on the following two aspects:

• Sufficient clamping force: It helps to prevent burrs from appearing when the metal melt pressure is at the highest peak, and at the same time has the resistance to breakage to avoid flying materials during die casting. "Zhuzun" die casting machine specially designed five The point double-hinge clamping structure has sufficient clamping force. For example, when the %&” machine only uses the system pressure of ‘#( in the national technical supervision and spot check, the measured clamping force reaches ")#$&*. sufficient clamping force.
• Sufficient injection capacity: to ensure that die casting will not cause overheating of the mold or a large amount of overflow, and at the same time to ensure that the machine has sufficient capacity to deliver enough molten metal and fill the mold with the required high ingest speed in a short time. cavity. The maximum air injection speed of "Zhuzun" die-casting machine is ,-./, and the injection ratio is large, which can die-cast any required zinc alloy products.

Advanced functions, easy operation, reasonable price and complete specifications are the characteristics of "excellent" die-casting machines. After choosing a die-casting machine brand that can meet the needs, it is particularly important to choose a die-casting machine with appropriate specifications. On the one hand, it can be selected according to the size, weight and complexity of the shape of the product (whether core pulling is required); system) to calculate the bulging force to select a die-casting machine with a slightly larger clamping force. Some small die-casting parts, such as buttons, pouch hooks, zipper pullers and lighter accessories, can be made into multiple molds in one mold; another example is the combination mold used by some customers for watch case production, and CM55 is used for one mold with four sets of combination molds Or CM88 die-casting machine is the most suitable, instead of using large-sized machines with small molds and small products. It cannot be unilaterally considered that a machine with a large tonnage (large clamping force) means high pressure. On the contrary, the small area of ​​the mold will cause the pressure to concentrate in the middle of the large template, causing damage to the die-casting machine template and mold, and also causing waste of resources, which does not meet the requirements of environmental protection.

Since the zinc alloy must fill the cavity within 0.02-0.04 seconds, the design and manufacture of the die-casting mold and its runner system is much more demanding than that of the plastic mold. The runner system is to guide the molten metal to fill the cavity in a certain way. It plays an important role in controlling and regulating the flow direction, pressure transfer, filling time, exhaust conditions and mold temperature distribution of the molten metal, and also determines the die casting. An important factor in the surface quality and internal quality of parts. However, many manufacturers are used to making die-casting molds by making plastic molds. As a result, the die-casting machine must be produced with high pressure, high speed, high temperature and increased clamping force, resulting in defects such as air bubbles, cold insulation and shrinkage holes. , The runner returns to the furnace, the yield is low, and the energy consumption is large. In order to obtain high-quality die-casting parts and achieve maximum die-casting efficiency, an excellent runner system must be designed. This system makes the flow of molten metal in the cavity smooth, minimizes pressure loss, and allows the remaining air to be discharged smoothly. Produce high-quality castings in the most economical way.

1. The metal runner system is composed of a series of pipes of different lengths and diameters, which bring the zinc alloy melt from the lower side of the injection plunger to the gate at different high speeds. In addition to the changes in length and diameter, there are also many directions. Each change requires energy consumption to overcome resistance, so the design principle of the runner system should converge from the gooseneck to the gate, avoid sharp corners, and smooth the surface of the flow path to reduce resistance and maintain Flow velocity of liquid zinc alloys.
2. Use a conical inlet with a sprue.
3. The main runner adopts an ideal runner-type runner design. The cross-sectional area of ​​different runners in the runner gradually decreases toward the flow direction, and the corners are elliptical curves, that is, the bend should have a larger The purpose of the bend radius is to reduce drag and reduce the possibility of trapped air and cavitation in the bends downstream of the runner.
4. Try to use long tapered tangential runners and thin gates. The flow rate at the gate is ideal for 40-60 seconds.
5. Minimize overflow (garbage level) settings as much as possible, and select suitable exhaust ducts.
6. Good thermal balance between cavity, wall thickness and temperature.

Smelting Zinc Alloy Correctly Strictly control the composition of zinc alloy. The smelting of die-casting zinc alloy is an important part of die-casting alloy. Manufacturers who have the conditions should preferably use a centralized melting furnace to melt the zinc alloy, so that the alloy ingot and the return material are evenly mixed, and the flux can be used more effectively, so that the composition and temperature can be maintained. Uniform and stable. If the material is directly charged in the hot room machine melting pot, the ground and the return material should be kept clean. Zinc alloy products mixed with impurities will cause severe intergranular corrosion. The main components and impurities in zinc alloy have a great influence on die casting products, and should be strictly controlled and mastered. Aluminum is its main component, which can reduce the melting point, improve casting properties, and increase alloy strength. Copper can increase hardness and strength, and magnesium can inhibit Intergranular corrosion of zinc alloy due to impurities, the specific content of iron has little effect on the alloy, while other impurities are harmful and may cause intergranular corrosion. Therefore, the alloy composition is reasonably controlled to prevent impurities from being mixed into zinc alloy die-casting. one of the keys.

• All of our zinc die castings are guaranteed to be shipped to you on time.
• Our staff is dedicated to providing the highest levels of customer service to ensure full customer satisfaction every time.
• Our die casting zinc alloy is ideal for those project requiring complex shapes or unique requirements.
• Our zinc die castings are of the highest quality and most affordable prices.
• Finish the parts in time to provide the strongest support for your R&D projects.
• Do zinc die casting manufacturing according to your drawings or samples
• We offer customers full-service zinc alloy die castings and related capabilities from design to delivery. We work with a large variety of metal options, making us your one-stop source.

1. It’s bigger than weight, has more texture than weight, and has more strength than plastic injection molding.
2. Good casting performance, can die-casting complex shape, thin-walled precision parts, casting surface is smooth.
3. Surface treatment: electroplating, spraying and painting.
4. No iron absorption, no corrosion, no die sticking during melting and die casting.
5. Good room temperature mechanical properties and wear resistance.
6. Low melting point, melting at 385 ℃, easier to form than aluminum alloy die casting

Our zinc surface finishing includes (but is not limited to):

• Powder Coating (electrostatic application)
• Wet Paint
• Chromate
• E-Coat
• Electroless Nickel
• Chrome
• Silk Screening and Stenciling
• EMI/RFI Shielding
• Surface Conditioning (shot and bead blasting)

• Good strength and hardness
  
• Good casting performance, can be used for casting precision parts with complex shape and thin wall, and the casting surface is smooth.
  
• Surface treatment: electroplating, spraying and painting.
  
• During melting and die casting, no iron absorption, no corrosion, no mold sticking.
  
• High dimensional accuracy and stability.
  
• It has good room temperature mechanical properties and wear resistance
  
• Low melting point, melting at 385 ℃, it is easier to form than aluminum alloy die casting.

1. To control the generation of pores, the key is to reduce the amount of gas mixed into the casting. The ideal metal flow should be continuously accelerated from the nozzle to enter the cavity through the shunt cone and the runner to form a smooth and consistent metal flow. The design of the runner, that is, the pouring flow should be gradually reduced from the nozzle to the inner gate at an accelerated rate, which can achieve this purpose. In the filling system, the mixed gas is due to the mixing of turbulent flow with the metal liquid phase to form pores. From the study of the simulated die-casting process in which the metal liquid enters the cavity from the casting system, it is obvious that the sharp transition in the runner and the incremental pouring The cross-sectional area of ​​the runner will cause the molten metal to flow turbulently and entrain the gas. The stable molten metal is conducive to the gas entering the overflow groove and the exhaust groove from the runner and the cavity, and then being discharged out of the mold.
2. Die-casting is the final product of die-casting production. The design of die-casting is the first job encountered in die-casting production technology. Zinc alloy die-casting is mainly designed according to the requirements of use. Whether the structural process of die-casting is reasonable? The structure, the quality of the die casting, and the production cost have a direct impact. If the structure of the zinc alloy die casting is unreasonable, it will not only lead to a complex mold structure, but also cannot guarantee the molding quality. For hot cracks: Do not change the thickness of the die casting sharply to reduce stress; adjust the relevant die casting process parameters; reduce the mold temperature.
3. For the phenomenon of intergranular corrosion: mainly control the content of harmful impurities in alloy raw materials, especially lead <0.003%. Pay attention to the impurity elements brought by the waste.
4. For water marks and cold insulation, the mold temperature can be increased, the gate speed can be increased, or the overflow groove can be enlarged in the cold insulation area to reduce the appearance of cold insulation.
5. The manufacturability of zinc alloy die castings refers to the applicability of die castings to forming and processing. The shape, structure and size of die castings directly determine the specific structure and complexity of the die casting mold. We should try our best to design the mold. It is simple, reasonable and feasible. Therefore, compared with die-casting parts, it is required to achieve reasonable structure and beautiful appearance in combination with the needs of die-casting molds without affecting the structural function, aesthetics and performance of die-casting parts. Easy to manufacture.
6. In addition to the influence of various technological factors on the quality of die castings, the craftsmanship of the structural design of the parts is also a very important factor. The rationality of the structure and the adaptability of the process determine whether the follow-up work can be carried out smoothly. Various problems encountered in die-casting production technology, such as the selection of parting surface, runner design, and precision requirements, are all related to the die-casting process of the die-casting itself.

1. High precision requirements such as: electronic equipment shell, mobile phone shell, U disk shell, other accessories with high precision requirements, etc.
2. Craft gift industry: such as badges, medals, trophies, keychains, bottle openers, metal ornaments, medals, power, etc.
3. Luggage and clothing hardware: buttons, hook buckles, belt buckles, rope buckles, stretch buckles, carabiner, etc.
4. Other accessories such as: liquor license, hinge, bottle cap, smart door lock, massager shell, etc.

• 1.the material  of die casting: Lee KEE Group aluminium  & zinc and etc
• 2. Die Casting machine:LK GROUP , YIZHIMI Group,lijie
• 3.Use Green Energy ,Save the world :  Huawei,Natural gas,Electricity ——choose us , for the Minghe Casting.thanks
• 4, Die Casting Mold :Bigger Size  ,and more than 50000 shots  mold life.
• 5.Inspection equipment:CMM