Patent ID: 6287102
Filing Date: 2001-09-11
Classification: B29C

Abstract:
A shaping deice for an extrusion system, comprising:a calibrating device having a plural of calibrating tools arranged one after another along an extrusion direction in which an extruded article travels through the calibrating device, each calibrating tool having an upstream end face and a downstream end face and mould surfaces extending between the upstream and downs end faces for contacting outer surfaces of the extruded article passing through the calibrating tool, each calibrating tool further including cooling ducts for passage of a heat-treatment agent therethrough; andat least one seal device disposed between the downstream end face of at least one calibrating tool and the up end face of an immediately succeeding calibrating tool, the seal device being structured and arranged to maintain a space in the extrusion direction between the respective end faces between which the seal device is disposed so as to create a cavity surrounding the extruded article that is closed off from environmental pressure outside the calibrating device, whereby said cavity can be evacuated to a reduced pressure relative to said environmental pressure.