Mold for forming plastic cap with perforation about the peripher

Details Mold for forming plastic cap with perforation about the peripher Mold for forming plastic cap with perforation about the peripher

1984-08-15

1986-10-21

Hoag, Willard E.

Static molds

Forming helical or threaded product

249 63, 249 67, 249144, 249152, 249160, 425412, 425414, 425444, 425542, 425556, 425DIG5, 425DIG58, B29C 4526, B29C 4533, B29C 4544

Patent

active

046181210

ABSTRACT:
A mold for forming a plastic cap and removing a cap from such a mold. The mold comprises female and male members which, together, form a mold cavity in which the cap is formed. The female member includes an upper assembly and a plurality of cams. The cams have radial protrusions engaging the male member to form annular recesses in the cap. The cap is removed from the mold by moving the upper assembly of the female member axially and the cams thereof radially away from the cap, and then removing the cap itself from the male member of the mold. Preferably the cap is shrunk onto the male member to develop a space between the cap and the female member of the mold prior to moving the female member away from the cap.

REFERENCES:
patent: 1918532 (1933-07-01), Geyer
patent: 2948031 (1960-08-01), Webb
patent: 3325576 (1967-06-01), Kessler
patent: 3940103 (1976-02-01), Hilaire
patent: 4286766 (1981-09-01), Von Holdt
patent: 4383819 (1983-05-01), Letica
patent: 4496302 (1985-01-01), Brown
patent: 4502660 (1985-03-01), Luther
patent: 4541795 (1985-09-01), Cole
patent: 4552328 (1985-11-01), Dutt et al.
Randolph et al., Plastics Engineering Handbook, Reinhold, N.Y. (1960), pp. 287 & 289.

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