INJECTION UNIT

• Main Authors: PAULOVIC, ANTHONY, TOOMEY, CLIVE A, KESTLE, MARTIN R
• Format: Patent
• Language: English; French
• Published: 17.04.2007
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates broadly to injection molding machines and more particularly to a novel combination of a barrel and carriage assembly for us e in an injection unit of an injection molding machine. Barrels are conventionally mounted at an end in a carriage of an injection unit. Axial carriage force is directed along the entire length of the barrel which requires a thick barrel wall to withstand the axial carriage force. In addition, installation of the barrel in a conventional carriage is difficult and time consuming, and prone to alignment errors. A barrel (30) and carriag e assembly (34) is disclosed having a first complimentary couplers and a secon d complimentary couplers. The first couplers (46) interlock to secure the barr el intermediate the ends of the barrel to a carriage (34). The second couplers retain an end of the barrel in the carriage preventing rotation of the barre l during operation