Die casting question and answer

1. What is die casting?

Die casting mainly refers to the process of injecting molten metal into a mold, solidifying it, and then removing it to allow another part to be cast using the same mold. Generally speaking, die casting can be divided into two general processes, low pressure die casting (such as gravity casting, perm molding, etc.) and high pressure die casting. XY-GLOBAL specializes in high-pressure die casting process using aluminum or zinc alloy.

2. What is a die casting machine?

A die casting machine is a device used to install die casting tools to make castings. The main purpose of the die casting machine is to inject metal into the mold, and keep the mold closed and the solidification and strengthening of the metal during the injection process. Finally, the die-casting machine is used to push the plates in the die-casting mold to push out the parts. It consists of two main systems-end of clamping and end of shooting. The injection end is where the metal is poured and accelerated into the mold, while the clamping end (pressure plate) is where the mold is installed and kept closed during injection and strengthening, and where the parts are ejected and extracted from the mold.

Although there are several types of die casting machines, most machines used in the die casting industry have vertical pressure plates that open and close horizontally. These machines can be subdivided into two categories: hot and cold room machines. Most modern equipment uses hydraulic chucks and pneumatic gun heads, although there are many variations on these types of machines.

3. How to calculate the tonnage of the machine?

The force required to close the mold = cavity pressure x projected area of the casting.

F = force (clamping)

P = increased pressure.

A = Projected area of all surfaces where aluminum is seen.

The denser the application, the more clamping force is required to keep the machine closed.

Put another way:

Approximate machine tons required to keep the mold closed = (force required to keep the mold closed, plus an additional 60% for the runner and an additional 20% for the safety factor).

4. What is a trimming mold?

A trim is a tool used to remove gates and flashes from parts after casting operations. Decorative tools are used to decorate printing machines. It consists of the lower half and the upper half. The entire lens is placed on the lower half of the tool, on the fixed half of the trimmer, the upper half moves to a blank space or cuts off any door, overflow and flash. The trimming tool can also punch any flash in the hole and clean the part.

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5. What are some minor operations usually performed on die castings?

Once the part is polished and trimmed, it is usually exposed to secondary processing such as machining, anodizing or powder coating, to name a few. These processes often add or change characteristics that are not normally achieved in the as-cast state. For example, parts can be machined to a level of accuracy that would normally not be achieved with original die casting, or they could be perforated. In addition, casting can be powder coated to increase color, or anodized to improve corrosion resistance.