Method of preparing a coated molded article

Details Method of preparing a coated molded article Method of preparing a coated molded article

B - Operations, Transporting

29

C

B29C 41/20 (2006.01) B29C 41/34 (2006.01) B29C 45/14 (2006.01) B29D 11/00 (2006.01)

Patent

CA 2527811

The present invention relates to a method of preparing a coated molded article (59) by means of in-mold coating. The method involves the use of a mold apparatus (1) that includes a rotatable core (29) having at least one molding surface (32, 35), a first die (11) and a second die (17) each having an internal surface (14, 20) and each of which are reversibly engageable with the rotatable core. The second die (17) has a reversibly slidable portion (23) having an internal surface (26) that defines substantially the internal surface (20) of the second die (17). The internal surface (14) of the first die (11) and a molding surface (32) of the rotatable core together define a first mold cavity (38) in which a molded plastic article (44) is formed. The mold apparatus is opened, the core (29) is rotated to align the molded plastic article (44) with the internal surface (20) of the second die (17). The second die (17) is engaged with the rotatable core (29), and an intermediate second mold cavity (53) is formed, into which a coating composition (56) is introduced. The reversibly slidable portion (23) of the second die (17) is moved towards the rotatable core (29), thus reducing the volume of the intermediate second mold cavity (53) and causing the coating composition (56) introduced therein to spread over the first surface (50) of the molded plastic article (44). The mold apparatus (1) is opened and a coated molded article (59) is removed from the rotatable core (29). The present invention also relates to a mold apparatus (1).

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