| 摘要 |
1,146,388. Extrusion/calendering machines. STEWART BOLLING & CO. Inc. 7 Aug., 1967 [25 Aug., 1966], No. 36197/67. Heading B5A. An extrusion/calendering machine for rubber or plastics comprises a two-part extrusion die 41, 42 the upper part 41 being connected to the calender frame (33), 34 and the lower part 42 being connected to a horizontally reciprocable extruder. Such an arrangement allows separation of the die parts to facilitate cleaning thereof. The extruder (B), Fig. 1 (not shown), is reciprocated by a double-acting fluid-pressure motor (20), and to ensure mating and correct alignment of the die parts when the extruder is moved towards the calender, keys 60, Fig. 2, and key slots 61 are provided, see also Fig. 3 (not reproduced), and the lower side faces 50 of the die part 42 are inclined and engage similarly inclined surfaces 51 on frame members 52, the die part being held in position by transversely movable wedge locks 65. Surfaces 51 are formed by replaceable wear plates 54, e.g. of hard bronze, and movement towards the calender is limited by adjustable stop-screws 55. Wedge locks 65 are reciprocated by fluidpressure motors (71), Fig. 3 (not shown). The extrusion orifice 43 is situated somewhat above the nip of calender rolls 30, 31 and during operation, die part 41 may be attached to the extruder by means of bolts 47. The contour of extrusion orifice 43 may be changed by replacing an insert 45. The extrusion die may comprise heating and cooling means. |
