Internally coated mold, and internal mold coating forming method

An in-mold coat-forming method using an in-mold coat-forming mold which comprises a mold cavity formed by a male mold and a female mold;

• a shear-structured engaging portion;
• and a coating-material injector for applying a coating, in the mold cavity, on the surface of a resin formed product formed in the cavity, and which further comprises a groove formed along the circumference of a cavity in the vicinity of the edge of the cavity and disposed adjacent to an engaging portion of the mold, characterized in that, after a resin is formed in the mold, the mold is slightly opened so as to have a coating material injected therein and is then clamped again so that the coating material extends across the surface of the formed product in the mold and coats the formed product.

An in-mold coat-forming method using an in-mold coat-forming mold which comprises a mold cavity surrounded along the circumference thereof, by a shear-structured engaging portion formed by a male mold and a female mold;

• and a coating-material injector for injecting a coating material into the mold cavity, and which further comprises a pressure piece having at least one temperature-regulating element disposed therein is disposed in the engaging portion, characterized in that, after a resin is formed in the mold, the mold is slightly opened so as to have a coating material injected therein and is then clamped again so that the coating material extends across the surface of the formed product in the mold and coats the formed product.

An in-mold coat-forming method using an in-mold coat-forming mold which comprises a mold cavity formed by a male mold and a female mold;

• a shear-structured engaging portion;
• and a coating-material injector for applying a coating, in the mold cavity, on the surface of a resin formed product formed in the cavity and which further comprises a groove formed along the circumference of a cavity in the vicinity of the edge of the cavity and disposed adjacent to an engaging portion of the mold, and an auxiliary cavity extending in the opening and closing directions of the mold and disposed along the circumference of the edge of the mold cavity, characterized in that, after a resin is formed in the mold, the mold is slightly opened so as to have a coating material injected therein and is then clamped again so that the coating material extends across the surface of the formed product in the mold and coats the formed product.

An in-mold coat-forming mold, comprising:

• a mold cavity formed by a male mold and a female mold;
• a shear-structured engaging portion;
• and a coating-material injector for applying a coating, in the mold cavity, on the surface of a resin formed product formed in the cavity, characterized in that an auxiliary cavity extending in the opening and closing directions of the mold is disposed along the circumference of the mold cavity, a groove is formed along the circumference of the surface of the auxiliary cavity to be coated, and a pressure piece having at least one temperature-regulating element disposed therein is disposed in at least a part of the auxiliary cavity or the engaging portion.