Patent ID: 7429348
Filing Date: 2008-09-30
Classification: B25G,B29C,B29K,B29L,Y10T

Abstract:
1. A method for compact injection moulding of a long tubular thermoplastic item with one at least partly through-going hole longitudinally of the item, the method including: providing an injection moulding machine with an mould with cavity having an internal volume that defines the dimensions of the item, in which mould is provided a mould core for formation of the at least partly through-going hole in the item, where the mould core is suspended at its first end, injecting melted thermoplastic material into the cavity of the mould, solidifying the melted plastic material, opening the mould, removing the item from the mould core, providing a central support of the mould core at a free section of the mould core at a certain distance from the first end of the mould core in the mould at the beginning of the injection of the melted plastic material into the mould, and where the mould core before finishing the injection of the plastic material is released from the support for allowing the melted plastic mass to fill the cavity between the internal wall of the mould and the free section of the mould core, rotating at least a part of the mould core during at least part of the injecting;