1. Doubled Part Output
Instead of increasing the mold size by adding more cavities, a stack mold maintains mold size and machine size by adding a second layer of cavities parallel to the first layer.

The fill, pack and cooling time remain the same for a stack mold and only the mold open and mold close time will add to the cycle time.

 2. Reduced Part Price
The part price is determined by the machine hour rate, which is directly related to the machine clamp tonnage. A stack mold requires only about half the clamp tonnage than a single-face mold with the same number of cavities. (e.g. An 8+8 cavity stack mold, instead of a 16-cavity single face mold design, requires a machine only half as big; smaller mold, smaller machine).

 However, it has the same production output of the 16-cavity mold. A 16-cavity, single-face mold running in a 600-ton machine compared to an 8+8 cavity stack mold in a 300-ton machine would reduce the machine hour rate by 43 percent.1

 3. Efficiency and Improved Automation
Stack molds can produce multi-component assemblies in one shot and in one machine using the same parameters. By comparison, single-face molds would require the production synchronization between multiple machines, complicating post-molding operations.         

About First-rate Mold Solution Co., Ltd.
First-rate Mold Solution Co., Ltd. in China, provide industry design,mold design,mold manufacturing,molding analysis,project management service.

 About www.firstratemold.com
our website has a lot of professional knowledges in mold industry in blog and news, also we are interested in CAD/CAM/CAE, such as AUTOCAD,UGNX, PRO/E,CATIA, CIMATRON, SOLIDWORKS, MOLDFLOW and so on,we welcome professional engineer,mold maker and someone who are interested in injection molding,plastic product,injection mold and mold industry to our section of blog and news,we would like to share with them