The Inclulined Guide Pin In The Stationary Mold And Wedge Inserts In The Movable Mold

Inclined guide pins are frequently used for the actuation of side inserts as shown in Fig.7.5. The guide pins 15 are fixed in the stationary clamping plate 18.

Operation: When the mold opens, the side inserts 12 and 13 are pulled oyr of the workpiece by the guide pin 15. The workpiece is pushed out of forming core 20 by stripper plate 8 which is  ejected by ejector pin 5. For next injection process, the mold closes, the guide pins slip into the inclined hole of the side inserts 12, hence the side insert is kept in position by the supporting wedge 14.

The inclined guide pin 15 must not be exposed to bending force. If angle a is wider, the side insert will be pulled out with great force but the path will be short. For a long opening path the side insert can be moved at a narrow angle a but with small force.