1.Three plate mold used where the part can not be gated along the peripheral.
2.the pin point gate is used with this kind of mold.the opening sequence often is controlled by the stripper bolt and other latch mechanism.

3. the mold opening sequence

4. the latch mechanism used in three plate mold

 

5.The locating ring and runner stripper plate bushing

Locating ring: H-13 STL 48~52HRC

Bushing: 0-1STL 54~56HRC

 

6. the releasing of runner scrap

7. the design of puller pin

The minimum distance of .080” must be kept to avoide the blocking and breakage of runner reground.