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April 07 2016


Stack Molding For Plastic Injection Molding

Stack molds are some of the most amazing production tools to be found anywhere. The engineering and craftsmanship which goes right into a stack mold is really a marvel.

For that layman, who may never have built a plastic injection mold, it may seem like a large, fancy little bit of machinery that produces plastic widgets. Yet, through the perspective of an plastics mold maker, stack molds represent a very advanced level of know-how.

Exactly what is a stack mold?

There are several variations on the party theme of stack molds, but some common features are:

 Built for high production runs
 Have single cavity and multiple cores
 Use indexable cores to injection mold multi-materials
 Have the opportunity to do multiple operations from the molding cycle

Basically, a stack mold features a stationary "A" half, and a minimum of two "B", or moveable halves. They are just like the rotary molds which were in use for several years, but are vertical instead of horizontal.

Because of this the moveable cores rotate about a vertical axis, rather than horizontal. Also, the stack mold is very compact and possesses a lot smaller footprint.

Are stack molds expensive?

Yes, stack molds may be expensive. For this reason a high volume is required to justify their expense. However, specifically in medical or cosmetic molding, the ROI is easily realized.

Thinking about the considerable amount of engineering and mold making involved, the expense is understandable. Designing and developing a stack mold is not for novices, or mold makers who cut corners! Plastic injection molding is not easy, and stack molding is with an entirely new level.

Which are the applications for stack molds?

Because they are for high production products, the most popular applications are suitable for cosmetics and consumables, for example deodorant or toothpaste containers. Automotive and medical goods are also frequently produced using stack molds.

More and more items are being involving soft overmolding, such as toothbrushes or hairbrushes. These are perfect applications for stack molding.Since the part is injection molded, ovemolded, cooled and ejected in sequential cycles, production costs could be minimized.

What are the great things about stack molding?

Stack molds can be purchased in numerous configurations in order to meet various molding demands. Stack molding offers an economical and efficient manufacturing solution for that production of multiple plastic parts. Injection molding publication rack always trying to find more efficient way of molding, but for the right

Many of the cooking with your stack molding process include: Increased output efficiency (productivity)

 Decreases variety of machines required

 Lower machine size requirement vs.. multi-cavity single face molds

 Produce double the parts without increasing press size or clamp tonnage, which greatly reduces part costs

 Set-up time and run-time costs are divided by each of the parts produced

 Producing the front and back parts of an integral fob concurrently is a useful one of an application for stack molding

 Mold ejection functions are self-contained, no additional labor or steps required

Shinlone Precision Mould (Kunshan) co., Ltd owns leading position in mould design and manufacturing industry. Injection mould?Hot stamping mould?Auto mould?Double injection mould?Drawing mould Professional manufacturer-Shinlone Precision Mould.

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