Document Type and Number:
Japanese Patent JPS6365013
Kind Code:
B2
Abstract:
A coextrusion die for the extrusion of a tubular film comprising a distribution channel system connected to separate supply means for several plastics materials, each distribution channel system comprising at least two arched channels (24, 25, 26) provided in different axial planes, the ends of each channel (24, 25) being connected to the middle portion of the following channel (25, 26) and the distribution channel systems being located at different distances from the centre axis of the die, collecting chambers (18-20) communicating with said distribution channel systems and an annular slot (36) communicating with the collecting chambers (18-20). The channels are formed from grooves in the surfaces of discshaped elements (12-15). The arched channels (24, 25, 26) are interconnected by channels (27) passing through said elements.
Application Number:
JP50085881A
Publication Date:
December 14, 1988
Filing Date:
February 27, 1981
Export Citation:
International Classes:
B29C48/49; B21C25/02; B29C48/09; B29C48/10; B29C48/21; B29C48/30; B29C48/32; B29C48/33; B29C48/335; B29L23/00; B29D
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