Stack molds are the most amazing production tools 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 piece of machinery that creates plastic widgets. Yet, from your perspective of an plastics mold maker, stack molds represent an extremely higher level of expert knowledge.
Just what is a stack mold?
There are several variations on the party’s theme of stack molds, however, many common features are:
Built for extremely high production runs
Have a one cavity and multiple cores
Use indexable cores to injection mold multi-materials
Have the opportunity to do multiple operations in the molding cycle
Basically, a stack mold features a stationary “A” half, and a minimum of two “B”, or moveable halves. These are similar to the rotary molds which were being used for several years, but they are vertical as opposed to horizontal.
Which means the moveable cores rotate of a vertical axis, as opposed to a horizontal. Also, the stack mold is extremely compact and has a significantly smaller footprint.
Are stack molds expensive?
Yes, stack molds may be expensive. That is why an increased volume is needed to justify their expense. However, specially in medical or cosmetic molding, the ROI is quickly realized.
Thinking about the significant amount of engineering and mold making involved, the expenses is understandable. Designing and building a stack mold isn’t for newbies, or mold makers who go cheap! Plastic injection molding isn’t easy, and stack molding is with an entirely new level.
Do you know the applications for stack molds?
Because they are for high production products, the common applications are suitable for cosmetics and consumables, like deodorant or toothpaste containers. Automotive and medical products are also frequently produced using stack molds.
A growing number of merchandise is being desinged to use soft overmolding, like toothbrushes or hairbrushes. These are generally perfect applications for stack molding.For the reason that part is injection molded, ovemolded, cooled and ejected in sequential cycles, production costs might be minimized.
Which are the benefits of stack molding?
Stack molds are available in numerous configurations to fulfill a variety of molding demands. Stack molding gives an economical and efficient manufacturing solution for that production of multiple plastic parts. Injection molding publication rack always trying to find extremely effective method of molding, and for the right
Many of the benefits of the stack molding process include: Increased output efficiency (productivity)
Decreases number 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 some time to run-time pricing is divided by all of the parts produced
Producing the front and back aspects of a key fob at the same time is a great one of your application for stack molding
Mold ejection functions are self-contained, no additional labor or steps required
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