INJECTION MOLD AND TOOLING
Tandem Molds
Also known as toggle molds or T molds, tandem molds are a variation of a stack mold, with alternately filled layers. While one layer is filling and molding parts in its cavity (or cavities), the other layer is ejecting its part(s). This plastic injection mold design allows for different parts and designs to be run in each layer, using different shot sizes or plastic volume in each half. The popularity with this mold type is with family parts for assembly and longer cycle time components.


Tandem Mold Additional Features
Tandem Mold Customer Example
The customer’s part was taking too long to cool, thus wasting valuable press time and money. A1 engineered a tandem mold in order to run two parts in sequence from the same press and from the same mold.
Large Increase in Capacity Example
Large Increase in Capacity Example
Part Height: 2.8”
Material: Polypropylene
Part Weight: 7.5 lbs.
Shrink: .007/inch
Total mold weight: 18,000 lbs.
External Mold Dimensions: L 49” x W 36” x H 43”
Old Cycle Time: 70 seconds

