Description: (2-plate) molds
Typically called an “open & shut” tool, there is one parting line where the runner and part(s) are ejected. Cores and cavities are typically cut into the A and B plates. Frequently used when a single cavity is desired. Generally considered less expensive than A-series.
A single plate is used to satisfy both clamping and cavity core retention. Heavier A and B plates allow for easier cooling line and sprue bushing location.
- (+) Lowest cost tool type
- (+) Large gate required
- (+) Simple design and construction
- (+) Low maintenance (tool durability)
- (-) Requires sprue/runner/gate (cycle time)
- (-) Sometimes runner must be separated from parts
- (-) Not well suited for automation
- (-) Insert changes difficult
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