BARREL ASSEMBLY FOR AN INJECTION MOLDING MACHINE

• Main Authors: PAULOVIC, ANTHONY, TOOMEY, CLIVE A, KESTLE, MARTIN R
• Format: Patent
• Language: English; French
• Published: 11.12.2007
• 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 barrel assembly for use 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. A barrel assembly is disclosed having a first barr el coupler (46) and a second barrel coupler (60). The first barrel coupler secures the barrel intermediate the ends of the barrel to a carriage. The second barrel coupler retains an end of the barrel in the carriage preventin g rotation of the barrel during operation. The barrel section between the firs t barrel coupler and an end of the barrel is isolated from axial carriage forc e in operation.