FIELD: process engineering.
SUBSTANCE: invention relates to injection moulding machine to produce cover 128 with base wall holes, and comprises injection mould made up of make die 54 and female die 56 with forming opposite surfaces that form the cover moulding cavity. Annular roll 114 on one of said surfaces interact with opposite surface for injection moulding of disk jointed with base wall by means of thin fragile web. Separate extraction of the disk and envelope from the mould consists in that cover comes from the machine with the hole in its base produced due to disk removal inside the machine. Male die 54 comprises core 58, extraction sleeve 86 embracing said core to push the cover from the core, extracting punch 64 and appliance to drive extracting sleeve and punch separately relative to the core.
EFFECT: possibility to withdraw plate from injection mould cover.
20 cl, 14 dwg
