Device for ejection of moulded pieces from a moulding tool

Metal deforming – By use of closed-die and coacting work-forcer – With stripping or ejecting from tool

Reexamination Certificate

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Details

C072S427000

Reexamination Certificate

active

10495026

ABSTRACT:
The invention relates to a so-called spring cushion (5), for the ejection of moulded pieces (4) from a moulding tool (3), with a plunger (6), moving in a guide tube (9) within the moulding tool and loaded in the ejection direction (14) by means of a spring (15). According to the invention, the spring (15) is embodied as a draw spring, in particular as a spiral draw spring. Considerably longer service life can be achieved as draw springs do not have radial deflections on loading.

REFERENCES:
patent: 445238 (1891-01-01), Beach
patent: 1721283 (1929-07-01), Ruth
patent: 1977163 (1934-10-01), Wilcox
patent: 2227524 (1941-01-01), Williams
patent: 2329325 (1943-09-01), Berry
patent: 3555874 (1971-01-01), Kuhn
patent: 3620113 (1971-11-01), Gargrave
patent: 3911719 (1975-10-01), Degenhardt et al.
patent: 4887448 (1989-12-01), Kooi et al.
patent: 295 447 (1953-12-01), None
patent: 11 42 149 (1963-01-01), None
patent: 40 28 425 (1992-03-01), None

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