Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1985-08-09
1986-11-04
Silbaugh, Jan
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264 17, 264261, 264263, 264275, B29C 4514, B29C 4516
Patent
active
046209573
ABSTRACT:
A process for the manufacture of an optically transparent device of a selected size and shape and thickness, and having a first distinct portion (44) which is colorless, and a second distinct portion (46) which is of a selected color is disclosed. The process includes providing an injected molding cavity (14) of the selected size, shape and thickness, which cavity may be selectively opened and closed. The cavity is opened (10), and while in the open state, a sheet or film of material (48) is secured (52) to a distinct portion (46) of the cavity (14). The cavity is then closed (54) and a body material is then injected into cavity (14) at a selected temperature and pressure such that the device is formed. The body material has a characteristic such that when injected in the cavity (14) the first portion (44) of the device is formed colorless and transparent, and the second portion (46) of the device is formed and bonded to sheet (48) such that the second portion ( 46) is transparent and has the selected color. The cavity is then opened (56) and the resulting face shield device removed. In an alternate embodiment, two sheets of material (62, 64) may be added to the cavity (14) prior to the injected molding step.
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Kesterson James C.
Silbaugh Jan
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