| 摘要 |
Finishing machine for the manufacture of thermoplastic plastics plates and foils, which may be finished on both sides, is described which is applicable both to the manufacture of plates with thicknesses of, for example, 50 mm and more and to surface finished flat foils with very small thicknesses despite the very different respective prerequisites for such manufacturing objective. The new finishing machine has its inlet gap facing the slit nozzle (2) of an extruder, the gap being formed between a finishing and cooling roller (3) and an endless metal belt (6) rotating around two guide rollers (4 and 5) adjacent to the finishing roller (3). The metal belt (6) partially winds round the finishing roller (3) in the circumferential direction and with it forms a gap for the passage of the plastics melt film (1) issuing from the slit nozzle (2). There may be a second finishing roller 9 onto which the foil winds from the roller 3. Roller 9 may have a clearance from roller 3 and include its own metal belt 6. There may be a cooling device 13. Roller 3 may be a cooling roller. Belt 6 may cover more than one half the circumference of the finishing roller. Other arrangements are disclosed. |
