Stack molding for plastic injection molding

Stack molds are some of the remarkable production tools to be found anywhere. The craftsmanship and engineering that goes into a stock mold is really  marvel.

For the layman, who has never built a plastic injection mold, it might look like a fancy, huge piece machinery that generates plastic widgets. Yet, from the perspective of an plastic mold maker, stack molds represent an extremely high level of expertise.

What is a stack mold?

There are different variations on the theme of stack molds, but some general specs are:

  • Built for extremely high production runs
  • Have a one cavity and different cores
  • Use indexable cores to injection and mold multi-materials
  • Have the capability to do different operations in the molding cycle

Basically, a stack mold has a stationary “A” half, and at least 2 “B” or moveable halves. They are alike to the rotary molds that have been in use for many years, but are vertical rather than horizontal.

This means that the portable cores rotate about a vertical axis, rather than a horizontal. Also, the stack mold is extremely compact and has a much little footprint.

Plastic molding parts
Plastic molding parts

What are the applications of stack molds?

Because they are top production products, the general applications are for consumables and cosmetics, such as toothpaste or deodorant containers. Medical and automotive products are normally produced using stack molds.

More and more items are being designed to use soft overmolding, such as hairbrushes or toothbrushes. These are best applications for stack molding. Because the part is plastic molding parts, chilled, overmolded and ejected in sequential cycles, production costs can be reduced.

What are the advantages of stack molding?

Stack molds are accessible in different configurations to meet a big range of molding demands and Cosmetics injection molding. Stack molding provides an economical and perfect manufacturing solution for the production of multiple plastic molding parts. Injection molding china firms are forever looking for more perfect way of molding and for the right.

A few of the advantages of the stack molding process contain: increased output efficiency

  • Reduces number of machines needed
  • Lower machine size need Vs. multi-cavity single face molds
  • Generate twice as many parts without rising press size or clamp tonnage, which greatly decreases part costs
  • Set-up time and run-time cost are divided by all the parts generated
  • Producing the back and front parts of a key fob at the same time is a best example of an application of stack molding
  • Mold ejection functions are self-contained, no extra labor or steps needed.

Looking for injection molding China partner to support your stack mold project? Contact us to get price.