FAQ

When the new die-casting mold is in place, because there is no corresponding understanding of all aspects of its performance, it is necessary to confirm the following content during acceptance.

1. Is the mold number clear and correct?
2. Mold size?
3. What is the diameter of the material cylinder?
4. What is the eccentricity under the mold?
5. What is the spacing of the ejector holes?
6. What is the size and spacing of the tie rod holes?
7. Mold cavity error value ≤ 0.1mm (check the indentation around the cavity)?
8. Surface roughness Ra≤0.4μm?
9. There are no damages, scratches or cracks on the surface of the cavity?
10.  Can the thimble and slider be free from jamming?
11. The movable and fixed mold core is 0.02~0.06mm higher than the mold base?
12. Is the arrangement of the ring holes on the mold base, top plate, thimble fixing plate and mold foot reasonable and convenient?
13. Are the cooling water inlet and outlet marked clearly?
14. Does the cooling water mold end interface match the specifications of the company’s common water pipes?
15. Does the hydraulic cylinder mold end interface match the specifications of the company's common oil pipe interface?
16. Does the supplier provide tie rods and top rods?
17. Does the supplier provide core spare parts?
18. Does the supplier provide spare parts drawings?
19. Does the supplier provide the material certificate and heat treatment report?

First, You can always get some lower price from some suppliers in China. There is no lowest price in China at all. There is only much lower price one by one.

    Of course, if you could bear various kinds of bad problems and invalid commitment of cheaper productions. Their price is cheaper $ 1 than us and you can earn 10000 USD on 10000 pcs parts. But you will lose more than 10000 USD, even more lose a faithful customer if it happened a mechanical mishap occur. At the same time, I don't think you can get more  higher efficiency of the supply when you get a price which is lower 0.5-1 USD because  price elasticity depends on different service.

    Finally, you are an expert in the filed, if they can give you an offer which is even lower than the cost. What will you think about it.

    What you will get is what you paid for.

You can call me if you have any questions ,we will reply you as soon as possible!

• First, Customer could send us your sample or drawing, such as 2D and 3D drawing (IGS or STP format)        
•  Second, Our engineers will check the drawing carefully and then provide you a better price.
•  Third, If you accept, then order confirmed.

Our factory located on Dongguan which is a beautiful city which is very near Guangzhou  and Shenzhen city. You can fly to Shenzhen Bao'an International Airport (ZGSZ) or Guangzhou Baiyun International Airport (ZGGG), we will pick you up at the airport.

We are a factory. We provide you one-stop service, from mold design to finish part.

For Aluminum Parts:

• A360
• A380
• ADC6
• ADC10
• ADC12
• ALSi12
• ALSi9Cu3

For Zinc Parts:

• Zamak3
• Zamak5
• Zamak8
• Zamak12

Parts for: Cars, Bikes, Aircraft, Musical instruments, Watercraft, Optical devices, Sensors, Models, Electronic devices, Enclosures, Clocks, Machinery, Engines, Furniture, Jewelry, Jigs, Telecom, Lighting, Medical devices, Photographic devices, Robots, Sculptures, Sound equipment, Sporting equipment, Tooling, Toys and more.

ISO9001/ TS16949 Die Cast Company

SGS Audited Supplier  
Vacuum Aluminum Die Casting,Powder Coating
Limited Porosities Pressure Die Casting Parts
CMM,X-ray Inspecition Equipment in house

cnc machining

1mm- 1600mm size cnc machining service
Small-run by Metal Rapid Prototyping

ASSEMBLY

Free design,Small batch production
one stop solution from concept to assembly

Aluminum Parts Expert

Die Casting | Aluminum Profile (Extrusion) | Sand Casting | Stamping

The sample of die casting and cnc machining etc  or small order is usually sent by TNT, FEDEX, UPS etc and the big order is sent by air or sea after clients confirm.

• one thing you’ll never find die cast   is trash
• maybe there’s a scratch.it’s perfectly good and doesn’t deserve to be thrown in the furnace
• if you can agree Non fatal problem, keep millions of kilos of materials from being wasted
• and help many customer like you  save piles of money

Die Casting Mould Payments: advanced payment 40%  after contract signing;
The 60% balance will be paid after approval of mould by customer.
The payment term of die casting orders: T/T,30% as deposit be paid before production by T/T, 70% be paid before delivery.

Please send us drawings in IGS, DWG, STEP file etc.Sample will be okay if no drawing, then we will build and send you the  die casting ,cnc machining drawing to confirm before quote. Meanwhile, we will keep our promise about the confidentiality of the drawing.

• No requirements on the MOQ.
• Depand on which process do you choose ,
• For die casting : Flexible volume is accepted by us in view of this new project growing. general guality :500 pcs
• For investment casting:Flexible volume is accepted by us in view of this new project growing. general guality :500 pcs
• For sand casting:Flexible volume is accepted by us in view of this new project growing. general guality :500 pcs
• For cnc machining : no moq

Sorry ,I only show the part that approved by customer ,or some oldest style part .

Because I signed the NDA and only show the ability of  Fabrication  and Mechanical Service–die casting china ,CNC machining china,Assembly

welcome  visit www.diecastingcompany.com  ,Thank

Our factory near HK ,Shenzhen Airport ,Dongguan Humen High Speed Railway Station,
Find die casting supplier , cnc machining fatory .
Welcome to visit us, it is very convenient from Hk to dongguan.
It is also our pleasure to help you on pick-up and hotel booking.

• 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

we are manufacturer of die casting ,investment casting,sand casting,cnc machining,Assembly.learn more china die casting manufactring.

Dies are classified as: single cavity, multiple cavity, combination and unit dies.

A single cavity die requires no explanation. Multiple cavity dies have several cavities which are all identical. If a die has cavities of different shapes, it’s called a combination or family die. A combination die is used to produce several parts for an assembly. For simple parts, unit dies might be used to effect tooling and production economies. Several parts for an assembly, or for different customers, might be cast at the same time with unit dies. One or more unit dies are assembled in a common holder and connected by runners to a common opening or sprue hole. This permits simultaneous filling of all cavities.

Die casting dies are made of alloy tool steels in at least two sections called fixed die half and ejector die half. The fixed die half is mounted on the side toward the molten metal injection system. The ejector die half, to which the die casting adheres, and from which it is ejected when the die is opened, is mounted on the moveable platen of the machine.

The fixed die half of the die is designed to contain the sprue hole through which molten metal enters the die. The ejector half usually contains the runners (passage ways) and gates (inlets) which route molten metal to the cavity (or cavities) of the die. The ejector half is also connected to an ejector box which houses the mechanism for ejecting the casting from the die. Ejection occurs when pins connected to the ejector plate move forward to force the casting from the cavity. This usually occurs as part of the opening stroke of the machine. Placement of ejector pins must be carefully arranged so force placed upon the casting during ejection will not cause deformation. Return pins attached to the ejector plate return this plate to its casting position as the die closes.

Fixed and moveable cores are often used in dies. If fixed, the core axis must be parallel to the direction of die opening. If moveable, they are often attached to core slides. Should the side of a die casting design require a depression, the die can be made with one or more slides to obtain the desired result without affecting ejection of the casting from the die cavity. All moveable slides and cores must be carefully fitted, and have the ability to be securely locked into position during the casting cycle. Otherwise, molten metal could be forced into their slideways causing a disruption of operations. Although slides and cores add to the complexity and cost of die construction, they make it possible to produce die castings in a wide variety of configurations, and usually more economically than any other metalworking process.
 

Cold chamber machines differ from hot chamber machines primarily in one respect; the injection plunger and cylinder are not submerged in molten metal. The molten metal is poured into a “cold chamber” through a port or pouring slot by a hand or automatic ladle. A hydraulically operated plunger, advancing forward, seals the port forcing metal into the locked die at high pressures. Injection pressures range from 3,000 to over 10,000 psi for both aluminum and magnesium alloys, and from 6,000 to over 15,000 psi for copper base alloys.

Figure 2: Cold Chamber Machine. Diagram illustrates die, cold chamber and horizontal ram or plunger (in charging position).

In a cold chamber machine, more molten metal is poured into the chamber than is needed to fill the die cavity. This helps sustain sufficient pressure to pack the cavity solidly with casting alloy. Excess metal is ejected along with the casting and is part of the complete shot.

Operation of a “cold chamber” machine is a little slower than a “hot chamber” machine because of the ladling operation. A cold chamber machine is used for high melting point casting alloys because plunger and cylinder assemblies are less subject to attack since they are not submerged in molten metal.

Hot chamber machines are used primarily for zinc, and low melting point alloys which do not readily attack and erode metal pots, cylinders and plungers. Advanced technology and development of new, higher temperature materials has extended the use of this equipment for magnesium alloys. Figure 1: Hot Chamber Machine. Diagram illustrates the plunger mechanism which is submerged in molten metal. Modern machines are hydraulically operated and equipped with automatic cycling controls and safety devices.

In the hot chamber machine, the injection mechanism is immersed in molten metal in a furnace attached to the machine. As the plunger is raised, a port opens allowing molten metal to fill the cylinder. As the plunger moves downward sealing the port, it forces molten metal through the gooseneck and nozzle into the die. After the metal has solidified, the plunger is withdrawn, the die opens, and the resulting casting is ejected.

Hot chamber machines are rapid in operation. Cycle times vary from less than one second for small components weighing less than one ounce to thirty seconds for a casting of several pounds. Dies are filled quickly (normally between five and forty milliseconds) and metal is injected at high pressures (1,500 to over 4,500 psi). Nevertheless, modern technology gives close control over these values, thus producing castings with fine detail, close tolerances and high strength.

Regardless of the type of machine used, it is essential that die halves, cores and/or other moveable sections be securely locked in place during the casting cycle. Generally, the clamping force of the machine is governed by (a) the projected surface area of the casting (measured at the die parting line) and (b) the pressure used to inject metal into the die. Most machines use toggle type mechanisms actuated by hydraulic cylinders (sometimes air pressure) to achieve locking. Others use direct acting hydraulic pressure. Safety interlock systems are used to prevent the die from opening during the casting cycles.

Die casting machines, large or small, vary fundamentally only in the method used to inject molten metal into the die. These are classified and described as either hot or cold chamber die casting machines.

There are several ways to tell what type of die casting or molding process is best for your needs, using several criteria. See Minghe’s General Die Casting Design Data Sheet for more information.

Die casting is a metal casting process, which is characterized by applying high pressure to the molten metal using the cavity of the mold. Molds are usually made of higher-strength alloys. This process is 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. Depending on the type of die casting, a cold chamber die casting machine or a hot chamber die casting machine is required.
The term “gravity die casting” refers to castings made in metal molds under a gravity head. It is known as permanent mold casting in the U.S.A. and Canada. What we call “die casting” here is know as “pressure die casting” in Europe.