Sumitomo Plastics Machinery all electric plastic injection molding machines manufacturer

SHC Clamp Unit Features

The SHC's hydromechanical clamp (shown above) and electronics give molders the advantages of both toggle and direct hydraulic clamp machines by providing:

The separate mold height adjustment (production flexibility) and faster operation of a toggle

The precision control of tonnage and low pressure mold protection of a direct hydraulic clamp machine.

For example, decreases in dry cycle time for the SHC compared with its predecessor range from .9 seconds for the 110 ton to 2.3 seconds for the 385 ton. For take-out robots and 3-plate molds, higher precision positioning includes mold protection to .001 in. and mold open stop position accuracy to +/- .01 in.

High pressure oil is fed to the auxiliary cylinders to advance the moving platen. The rotary shutter quickly rotates 45° to provide a solid column with the guide bars and moving platen. High pressure oil is fed to the main "pancake" cylinder to build tonnage. The rotary shutter opens and oil is fed to the auxiliary cylinders to retract the moving platen.

The small volume of oil in the main hydraulic cylinder:

Reduces the time to increase/decrease clamp pressure

Lowers oil flow resistance and packing resistance for greater energy efficiency

Lowers hydraulic oil use

The two-position (open/closed) rotary shutter rotates on a central axis. This design's fast, smooth and reliable operation means faster dry cycling.

Please use the SHC Info buttons above at right to read more about this series of injection molding machines that offers ease of use and high performance at a general purpose price.

SHC Info

Brochure pdf