An apparatus for processing and subsequent further processing or further treatment of thermo - plastic plastics

摘要

863,521. Mechanically working plastic materials. WACKER-CHEMIE G.m.b.H. May 26, 1959 [May 28, 1958; Dec. 5, 1958], No. 17939/59. Class 86 [Also in Group V] Plastic material e.g. polyvinyl chloride issuing from the annular passage of the plasticiser described in Specification 758,513 is cut by means of a knife F and drops on to a worm H, which conveys the material to a perforated plate J. The material is moulded into the required shapes as it is forced through the plate J. Alternatively rotary knives may granulate the material as it leaves the plate J. To get rid of entrapped air, the material may be transported to the worm in vacuo by means of extensions 5, 12, Fig. 3, of the rotor and its casing respectively. The rotor 7 is constructed as in Specification 759,632 and splits the material into rods as it approaches the extension 5, where a knife 14 separates the extruded plastic. The worm 3 is housed in a cylinder 2 in gas-tight connection with the extension 12 so that the space surrounding the extension 5 can be evacuated by means connected to a pipe 13. Provision is made for heating or cooling the material by means 6, 4.