Unique Content Article on plastic injection molding, injection molding, plastics manufacturing

Stack Molding: Don't Blow Your Stack!

by Keith Klamer

Plastic injection molding may be the most utilized industrial process in the world. And no matter what the end product - whether a drug vial or a car door handle - the plastic injection molding process is more or less the same. Plastic, in the form of granules or pellets, is fed into a hopper, heated, than "injected" or rammed into a mold containing a cavity which is the exact shape of the part to be made.

Similarly to other plastic injection molding companies the world over, Illinois plastic injection molding companies discovered many years ago that if you assemble several molds in a line on the same press, you can turbo-charge your efficiency by adding more cavities. This series of connected face molds is known collectively as a "stack mold." Each mold in the stack has the same shape and mass as the one next to it, so they all fit within the same tie bar assembly.

While results vary, manufacturing productivity generally goes up in proportion to the number of molds in the stack. For example, a manufacturer can double productivity per cycle by doubling the number of cavities on the same given hydraulic or electric press.

There are many types of stack molds but some common features include:

* Very high production runs on fewer machines

* Many cores and cavites

* Indexable cores, to injection-mold multiple materials

* Possessing the ability to perform multiple operations in the same molding cycle

Generally speaking, a stack mold has a stationary "A" half, and at least two "B", or moveable halves. They are similar to rotary molds that have been in use for many years, but in many cases are vertical rather than horizontal. This means that the moveable cores rotate about a vertical axis, rather than a horizontal. Also, the stack mold is very compact and has a much smaller footprint than other types of molds.

Stack molds can be expensive. So a high volume is necessary to compensate for their price. But no worries; the return-on-investment is also high. Car and healthcare products are also typically made with stack mold technology.

Considering the tremendous amount of engineering and mold manufacturing involved, the expense is understandable. Designing and building a stack mold is not for beginners, or mold makers who cut corners! Plastic injection molding is not easy, and stack molding is on an entirely new level of expertise.



Learn more about<a href='http://www.advantechplastics.com'>this plastic injection molding company </a>; visit <ahref='http://advantechplastics.com/plasticinjectionmolding/'>Advantech Plastics website</a> today to learn how this Illinois manufacturer can meet your plastic injection molding needs.

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New Unique Article!

Title: Stack Molding: Don't Blow Your Stack!
Author: Keith Klamer
Email: keith@net-ahead.com
Keywords: plastic injection molding, injection molding, plastics manufacturing, industrial production
Word Count: 397
Category: Business
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