| 摘要 |
PCT No. PCT/DE94/00443 Sec. 371 Date Aug. 30, 1995 Sec. 102(e) Date Aug. 30, 1995 PCT Filed Apr. 19, 1994 PCT Pub. No. WO94/23927 PCT Pub. Date Oct. 27, 1994A process and an apparatus (10) for the production of a plastic article of large area and small wall thickness, wherein the plastic material (90) is injected in the viscous condition into a mold cavity which is defined by a bottom mold portion (20) and a top mold portion (36). During the operation of injection of the viscous plastic material, which takes place through an inlet (76), the top mold portion (36), with the bottom mold portion (20), forms a pre-molding cavity (86) which is enlarged in a wedge shape starting from the inlet (76). During injection of the viscous plastic material (90) into the pre-molding cavity (86) or immediately after the injection operation, the bottom and top mold portions (20, 36) are moved relatively towards each other, forming the definitive mold cavity (78), so that the viscous plastic material is uniformly distributed in the diminishing mold cavity. |
