Stack Molding For Plastic Injection Molding

Stack molds are some of the most amazing production tools can be found anywhere. The engineering and craftsmanship that goes in to a stack mold is actually a marvel.


For your layman, who has never built a plastic injection mold, it may appear like a major, fancy bit of machinery that creates plastic widgets. Yet, through the outlook during an plastics mold maker, stack molds represent a very advanced level of expertise.


Just what stack mold?


You’ll find so many variations on the party theme of stack molds, but a majority of common features are:


Built for high production runs

Have a one cavity and multiple cores

Use indexable cores to injection mold multi-materials

Have a chance to do multiple operations from the molding cycle


Basically, a stack mold carries a stationary “A” half, and a minimum of two “B”, or moveable halves. They are like the rotary molds which have been used for many years, however are vertical rather than horizontal.


Because of this the moveable cores rotate with regards to a vertical axis, rather than horizontal. Also, the stack mold is extremely compact and has a lot smaller footprint.


Are stack molds expensive?


Yes, stack molds are quite expensive. For this reason a top volume is needed to justify their expense. However, specially in medical or cosmetic molding, the ROI is quickly realized.


Considering the tremendous amount of engineering and mold making involved, the expense is understandable. Designing and creating a stack mold just isn’t for beginners, or mold makers who scrimp! Plastic injection molding isn’t easy, and stack molding is while on an entirely new level.


What are applications for stack molds?


Because they’re for prime production products, the regular applications are suitable for cosmetics and consumables, including deodorant or toothpaste containers. Automotive and medical products are also frequently produced using stack molds.


More and more items are being designed to use soft overmolding, for example toothbrushes or hairbrushes. They’re perfect applications for stack molding.For the reason that part is injection molded, ovemolded, cooled and ejected in sequential cycles, production costs may be minimized.


Which are the important things about stack molding?


Stack molds can be bought in numerous configurations to satisfy a variety of molding demands. Stack molding gives an economical and efficient manufacturing solution for that creation of multiple plastic parts. Injection molding organizations are always trying to find more effective means of molding, and also for the right


Many of the benefits of the stack molding process include: Increased output efficiency (productivity)


Decreases variety of machines required


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


Produce two times as many parts without increasing press size or clamp tonnage, which greatly reduces part costs


Set-up some time to run-time costs are divided by all the parts produced


Producing the front and back parts of a key fob concurrently is a good example of an application for stack molding


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


Coto Mold is a plastic injection mold making company located in Shenzhen of China that very close to Hong Kong. Today we have 10+ years experience in plastic mold making industry and we have strong technical background including our sales staff. More than 90% molds we made are for overseas customers, the mold including 2K mold, over mold, insert mold, hot runner mold etc., the products are for different fields like Automotive , Home appliance, Electrical, Medical, Packaging and so on.