B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/665
B29C 67/20 (2006.01) B29C 44/34 (2006.01) B29C 47/50 (2006.01) B29C 47/58 (2006.01) B29C 47/80 (2006.01)
Patent
CA 1224309
- 15 - ABSTRACT AN APPARATUS FOR PRODUCING EXPANDED THERMOPLASTIC MATERIALS An apparatus is disclosed for optimising a method of producing a foam or expanded thermoplastic material, the material usually being mixed with a propellant, The apparatus comprises a filter unit which is disposed between and connects, a fusing and homogenising extrusion device and a dynamic cooling device. The material is fed into the apparatus at one end of the extrusion device and passes sequentially through the extrusion device, the filter unit and the cooling device. Separate drive means are provided for the fusing and homogenising extrusion device and the cooling device respectively. Both the extrusion device and the cooling device are disposed on a common longitudinal axis. The connections of the two devices to the filter unit is effected by means of flange mountings. The filter traversed by the material. In the filter unit, the material flows through a conduit which flared conically outwardly from the filter to the inlet of the cooling device. The extrusion device is so mounted as to permit longitudinal axial thermal expansion and contraction to occur and to permit the extrusion device to be moved away from the cooling device for cleaning purposes.
463861
Berstorff (hermann) Maschinenbau G.m.b.h.
Robic Robic & Associes/associates
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