Method for making a molded applique product having backlighting capability

A method of making an applique product derived from synthetic resins by an in-situ polymerization molding process so as to produce a three dimensional product, said method comprising the steps of:

• (1) providing a flat substrate having a front surface and a back surface, said substrate being made of a synthetic resin,
• (2) printing on a surface of said substrate,
• (3) shearing the print substrate for use in a forming tool and punching said printed substrate to form a plurality of registration holes to register with a plurality of registration pins of a forming tool,
• (4) forming the printed substrate into a three dimensional shape to produce a formed substrate having low internal stress,
• (5) providing a mold having a mold cavity in which a mold surface has the same configuration as the front surface of said formed substrate, said mold having a front half and a back half,
• (6) conforming said formed substrate to fit securely into said mold cavity,
• (7) placing the formed substrate into said mold cavity in such a manner that the front surface of said formed substrate is in contact with said mold surface whereupon the mold is then closed for conducting the molding operation,
• (8) simultaneously injecting two flowable monomer resin solutions into the cavity located adjacent said back surface of said formed substrate through a gate means, said resin being constituted so as to polymerize in situ and fuse with said back surface.

A method of making an applique product derived from synthetic resins by an in-situ polymerization molding process so as to produce a three dimensional product, said method comprising the steps of:

• (1) providing a flat substrate having a front surface and a back surface, said substrate being made of a synthetic resin,
• (2) printing on a surface of said substrate,
• (3) shearing the printed substrate for fitting within a forming tool,
• (4) forming the printed substrate into a three dimensional shape to produce a formed substrate having low internal stress,
• (5) providing a mold having a mold cavity in which a mold surface has the same configuration as the front surface of said formed substrate, said mold having a front half and a back half,
• (6) conforming said formed substrate to fit securely into said mold cavity,
• (7) placing the formed substrate into said mold cavity in such a manner that the front surface of said formed substrate is in contact with said mold surface whereupon the mold is then closed for conducting the molding operation,
• (8) simultaneously injecting two flowable monomer resin solutions into the cavity located adjacent said back surface of said formed substrate through a gate means, said resin being constituted so as to polymerize in situ and fuse with said back surface, said mold having projections extending from said back half to contact the back surface of the substrate to cover areas which are to be back lit thereby preventing polymerization over the areas.

A method of making applique products derived from synthetic resins by an in-situ polymerization molding process so as to produce a three dimensional product, said method comprising the steps of:

• (1) providing a flat substrate having a minimum of 0.020 inches thickness, said substrate being made of a synthetic resin,
• (2) printing on a surface of said substrate using a formable ink,
• (3) cutting the printed substrate for fitting within a forming tool,
• (4) forming the printed substrate into a three dimensional shape to produce a formed substrate having a front surface and a back surface and a low internal stress,
• (5) providing a mold cavity including a mold surface of the same configuration as the front surface of said formed substrate,
• (6) conforming the formed substrate to have dimensions such that said formed substrate fits into the mold cavity in a secure position with said front surface of said formed substrate in contact with said mold surface,
• (7) placing the formed substrate into the cavity of the mold in a secure position with said front surface of said formed substrate in contact with said mold surface and closing the mold in preparation for a molding operation, and, after the completion of steps (1) to (7),
• (8) simultaneously injecting two flowable resin solutions into the cavity located adjacent said back surface of said formed substrate so the resin flows directly onto and perpendicular to the back surface of the formed substrate through a gate means, said resin being constituted so as to polymerize in situ and fuse with said back surface of said substrate, said printing step (2) using inks that can withstand the stresses of the forming step (4) as well as the polymerization reaction temperatures of step (8) without deforming,
• wherein step (4) is performed by a cold forming process,
• wherein step (6) of preparing the formed substrate is performed by die-cutting the formed substrate in a manner such that said formed substrate is dimensioned to be placed into the mold with a minimal interference fit,
• wherein said flat substrate of step (1) is a clear polycarbonate and said two injected resin solutions of step (7) are made of dicyclopentadiene resin solutions, and
• wherein said mold surface is maintained at a temperature of 20.degree.-80.degree. C. and the resin solution temperature is maintained between 30.degree. C. and 35.degree. C. immediately prior to injection into said mold cavity.