Plastic and nonmetallic article shaping or treating: processes – Laser ablative shaping or piercing
Patent
1996-10-29
1998-10-13
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Laser ablative shaping or piercing
264511, 264554, 264132, 264266, B29C 4318, B29C 5110, B29C 5916
Patent
active
058208097
ABSTRACT:
A manufacturing method for key tops includes the steps of molding a light-shielding film on a to-be-peeled shield by a plane printing, effecting colored printing to provide a readout part at a predetermined position on it in the state of a plane sheet prior to the 3-D molding, then sucking a printed light-shield film sheet on a metal mold with an evacuation system, adsorbing said light-shield film sheet onto the wall face in the metal mold. A push mold may be used with a suction system so as to be positioned in the female mold. Materials such as silicone are put into this metal mold for one-piece molding. A laser processing is effected on the surface of a key top prepared in a 3-D shape to form a desired pattern. By making the light-shield printing and pattern printing in the state of a plane sheet prior to the 3-D molding and effecting only a pattern processing by laser cut in the state of a stereographic shape, a laborious coating has been omitted which also results in improved accuracy of printing and at the same time a reduced number of steps.
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Kashino Masayuki
Nakajo Masaru
Oji Nobuaki
Tsuji Akihiro
Yajima Hiroshi
Polymatech Co. Ltd.
Vargot Mathieu D.
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