Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With product ejector
Patent
1989-02-07
1991-03-12
Chiesa, Richard L.
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With product ejector
249 661, 249176, 425438, B29C 4540
Patent
active
049988743
ABSTRACT:
A single-block central plunger is manufactured, which is particularly suited for the production of boxes made of plastic material for electric accumulators. The mould includes a mobile plate (3) supporting some lateral cores (5) and a fixed plate (2) supporting a fixed central plunger (7), wherein the mobile plate (3) moves co-axially in relation to the fixed plate (2) by sliding on some guiding columns (4). The fixed central plunger (7) supported by the fixed plate (2) is made from a single block and its cores (8) are obtained from the same block, as well as its box angle-plate (11), preferably by machining them with wire cutting spark erosion tool machines.
REFERENCES:
patent: 3473197 (1969-10-01), Wilds et al.
patent: 3564660 (1971-02-01), Darnell
patent: 3572424 (1971-03-01), Byrne
patent: 3669598 (1972-06-01), Tucker
patent: 3816047 (1974-06-01), Mohler
patent: 3838960 (1974-10-01), Lovejoy
patent: 3930780 (1976-01-01), Lovejoy
patent: 4481161 (1984-11-01), Grannen
patent: 4576568 (1986-03-01), Grannen
patent: 4676731 (1987-06-01), Grannen
patent: 4732558 (1988-03-01), Grannen
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