Unusual Machine Molds Large Sewer Manhole Systems

摘要

A major European molder (unnamed) recently installed a two-platen injection machine with 2750-ton clamp and shot capacity of 120 liters. The machine is being used to mold PP components for accessible sewer manholes up to 1 meter diam. The modular structure consists of an entrance cone, shaft ring, and shaft bottom, frequently adding up to an overall height of several meters. The shaft bottom alone weighs 62 kg (136.4 lb). The model SRM machine comes from Ettlinger Kunststoffmaschinen GmbH of Germany (U.S. office in Tyrone, Ga.). This is a two-platen press with two-stage, screw/plunger injection unit that is said to handle recycle as well as virgin plastics.