The challenge
Each stator stack is loaded into the mold and overmolded with an insulating layer. The stack has to sit in exactly the same place every shot, or the wall over the windings varies and the insulation cannot be trusted.
Case study
Stator overmolding tool
An insert mold that overmolds a motor stator in one shot, locating the lamination stack the same way every cycle.
- Industry
- Automotive
- Service
- Insert molding
- Year
- 2023
- Material
- PA66 GF30
- Press
- 55T vertical
- Tool steel
- H13 inserts
- Shot per stator
- 1
- Press, insert loaded by hand
- Vertical
Our approach
- Locating pins and a self-centring nest, so the operator cannot load a stack out of position.
- Designed for a vertical press, so the stack rests on the lower half by gravity while it is loaded.
- Venting at the end of fill around the slots, so the thin insulating walls fill without trapped air.
- Inspection of the first parts on the video measuring system, section by section.
The result
The tool overmolds the stack in a single shot with an even insulating wall, and runs in production on our vertical press with the stack located the same way each cycle.
Images
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