Injection molding machine has platen shaped to deflect under pressure with optional hydraulic assistance so as to reduce mold leakage

摘要

The shape of the base of the movable platen near the hydraulic cylinder unit (12) is arranged so that the essentially flat mounting surface (16) deforms under pressure to reduce leakage between the two halves of the mold (8). The deformation can be assisted by means of channels (14) connected with the hydraulic fluid supply to the pressure cylinder (12). The shape of the base of the movable platen near the hydraulic cylinder unit (12) is arranged so that the essentially flat mounting surface (16) deforms under pressure to reduce leakage between the two halves of the mold (8). The deformation can be assisted by means of channels (14) connected with the hydraulic fluid supply to the pressure cylinder (12). The pressure medium supply, e.g. gas, liquid or solid, to the channels (14) can be controlled independently and corresponding channels can also be incorporated into the upper fixed platen. Alternatively, the channels can contain a medium under permanent pressure to achieve the desired deflection.