초록 ▼

The apparatus has means (10, 11) for placing a parison (12) between two portions of a blow mold (14, 16). The parison (12) is put on the head of a blowpipe (32) placed between the two mold portions. On closing the mold, the top end of the parison is pinched in a top region of the mold and the bottom

The apparatus has means (10, 11) for placing a parison (12) between two portions of a blow mold (14, 16). The parison (12) is put on the head of a blowpipe (32) placed between the two mold portions. On closing the mold, the top end of the parison is pinched in a top region of the mold and the bottom end of the parison is clamped against the blowpipe (32). A pre-blow step is performed on the parison to obtain an envelope which is then turned over by moving the blowpipe (32) upwards together with a turnover piston (34, 36), prior to performing a final blow step.

대표청구항 ▼

[ What is claimed is:] [1.] A method of manufacturing a container-forming object out of plastics material, wherein the method comprises:(a) inserting a parison into a blow mold, having at least two mold portions suitable for being moved relative to each other to open and close the mold, in an open s

[ What is claimed is:] [1.] A method of manufacturing a container-forming object out of plastics material, wherein the method comprises:(a) inserting a parison into a blow mold, having at least two mold portions suitable for being moved relative to each other to open and close the mold, in an open situation thereof by placing a bottom end of said parison on a head of a blowpipe situated between the two mold portions which are spaced apart in said open situation,(b) moving the two mold portions towards each other to close the mold at least substantially, the parison being pinched in a top region of the mold, and the bottom end of said parison being clamped against the blowpipe in a bottom region of the mold,(c) performing a pre-blow step to obtain a pre-blown envelope having at least a portion of a periphery of the pre-blown envelope in the vicinity of walls of the mold without being pressed thereagainst, said pre-blown envelope having a bottom end portion in the vicinity of a top end of a turnover piston while being remote from the walls of the mold,(d) performing a turnover step by displacing the blowpipe together with the turnover piston upwards to turn the bottom end of the pre-blown envelope over onto itself forming a free edge that presents a turned over portion, and(e) performing a final blow step to obtain a blown envelope having the shape of the container-forming object.