Patent ID: 6989119
Filing Date: 2006-01-24
Classification: B29C,B29L

Abstract:
1. A honeycomb extrusion die comprising a die body incorporating an array of parallel feedholes and a discharge section connecting with the die body comprising an array of parallel pins forming criss-crossing discharge slots, the discharge slots communicating with the feedholes and opening onto a die discharge face, the feedholes being separated by a minimum feedhole inter-spacing and the discharge slots being formed by spaces between the parallel pins, the pins connecting to the die by pin root ends and having pin outer ends forming the die discharge face, wherein: the die includes a pin support section in the form of a planar die region disposed between and connecting with both the die body and the pin root ends, the pin support section comprising an array of apertures for conveying extrudable material from the feedholes to the discharge slots, each feedhole being in registry with and supplying batch material to only one aperture, the pin support section further comprising an array of pin support segments disposed among the apertures for joining the pin root ends to the die body, the pin support segments being of larger cross-section transverse to the feedholes than the minimum feedhole inter-spacing and the die consists essentially of two die elements directly connected by a metal-to-metal bond, the first element consisting of the die body comprising the array of parallel feedholes and the, second element consisting of a composite die discharge section incorporating both the array of parallel pins and the pin support section, the array of parallel pins and the pin support section being a unitary element.