Plastic Mold Technology


Welcome to PM Tooling. We are A China plastic mold,plastic molding, aluminum casting factory.

As providers of world class design services to the stamping industry, we are confident that we can address all of your tool design needs.

We hope that you find this site informative, as well as easy to navigate.

The proper design of an plastic injection mold will increase your chance of success in every way. Injection molding is difficult at best, a good 3D injection mold design will give you a solid foundation.

Your mold maker will be confident that the components all fit, the dimensions all work together, and that the mold will ultimately function as it should.

The injection molding engineer will have confidence in the injection mold design and the operation of the mold itself. You molder won’t be second guessing the design and it will help him process the parts.

ost of all, your customer will be delighted with a clean, flash-free, dimensionally correct plastic part.

What is Die Casting Mold

Die Casting is basically the manufacturing process through which a liquid material is emptied into a mold that includes a hollow opening of the desired art or shape and is then allowed to harden. This hardened casting is then removed and broken out in order to complete the process. Apart from using sand as the main mold material there is a metal that is used as the mold.

The Die casting molds are actually pre heated to nearly 392 degree Fahrenheit before the metal is pored in the cavity. The design of cavity for these casting molds does not chase the same principle for shrinkage like in the sand casting molds. This is because of the fact that the metal casting molds heat up and enlarge during the pouring process and so the cavity does not need to be expanded like in the sand castings.

What is important in good injection mold design?

A good design must be practical. The mold maker must be able to produce the components in a logical, orderly manner to make money. Often, close tolerance dimensions are specified when a much looser tolerance could have easily done the job.

  • Take an ejector pin plate, for example. Everyone knows that the thickness is basically irrelevant, but usually the dimension given is a close tolerance size. An experienced toolmaker will just ignore the tolerance and proceed, but nowadays, with the specialization of tasks in the shop, a less skilled operator would waste precious time holding an unreasonable tolerance.

  • The 3D geometry must be clean. The fast pace of mold making today makes it essential to have efficient, reliable software. The days of vague sketches, or toolmakers making up the design as they go are long gone. There are many excellent companies that offer high end software programs for designing molds, dies, and just about any kind of tooling you can imagine.

    CNC machines need clean geometry to run properly. If the design is sloppy and the translation of different software messy, the end result will show it. Plus, the operator will have a much easier time running the programs with clean geometry.

  • The design must be clear in it’s function. It is maddening for a plastic injection mold maker to spend hours deciphering what the designer means. Information that is assumed or omitted can delay the construction by days and cause unnecessary errors. Why should a toolmaker spend time looking up information that was right in front of the designer at one time?

    It is always much easier to include notes or details that show what is required than to search it out later on. Once the design is in process, and the information is available, why not simply give the mold maker the same information? For example, a 3D drawing can visually clarify many questions.