Mold separation apparatus

Details Mold separation apparatus Mold separation apparatus

1995-06-05

1997-11-25

Mackey, James P.

Plastic article or earthenware shaping or treating: apparatus

Shaping surface including means to release or remove product...

Removal-miscellaneous

425440, 425808, 425DIG60, 264334, B29D 1100

Patent

active

056909730

ABSTRACT:
An apparatus for separating individual contact lens mold assemblies that each contain a contact lens mold between a front curve mold half and a back curve mold half, each of the mold halves having annular circumferential flanges, is disclosed. The apparatus comprises a first device for applying steam at a first temperature to the back curve mold half to form a temperature gradient ranging from about 2.5.degree. C. to 6.0.degree. C. between the back curve mold half relative to the front curve mold half, and, a second device including a set of pry tools that are inserted between the circumferential flanges of the front mold and back mold halves of the contact lens mold assembly, the pry tools including a first set of pry fingers for retaining the front curve mold half and a second set of pry fingers for biasing the back curve mold half upwardly at a predetermined force with respect to the front curve mold half to effectively remove the back mold half therefrom.

REFERENCES:
patent: 4364878 (1982-12-01), Laliberte et al.
patent: 5417557 (1995-05-01), Ross et al.

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