INJECTION MOLD AND TOOLING
Stack Molding
Without changing your molding press or tonnage, a stack mold increases productivity and reduces your part costs by using a stack of multiple mold layers. Simultaneously closing all layers in the stack enables molding all parts, in all layers, in one shot. In addition, the molded parts can have a different geometry. A1 was one of the early innovators of stack molds in the 1960s, and our experience qualifies us as experts in stack molds.


Stack Molding Additional Features
Stack Molding Customer Example
The customer needed to increase throughput based on consumer demand for a plastic roof ridge vent. Rather than running two molds in different presses, A1 engineered a stack tool that virtually doubled capacity in a single press.
Stack Mold - Large Increase in Capacity Example
Stack Mold - Large Increase in Capacity Example
Part Height: 2.8”
Volume: 52 cubic inches
Material: CO-PP
Part Weight: 772 grams
Projected Area: 664 square inches
Shrink: 1.018 inches
Total mold weight: 31,000 lbs.
External Mold Dimensions: 55”W x 68”H x 36”L

