In-mold coating injection device and in-mold coating injection method using the same

An in-mold coat injection device for injecting a thermosetting liquid coating agent between an outer surface of a molding base material held inside a mold which is heated and an inner surface of the mold, the in-mold coat injection device comprising:

• an injection machine having an injection port and an opening/closing valve for opening and closing the injection port at a tip portion, the injection machine being configured to inject the thermosetting liquid coating agent ejected from the injection port between the outer surface of the molding base material and the inner surface of the mold;
• and
• a heat insulation layer provided between the tip portion of the injection machine and the mold, the heat insulation layer being made of a material having a thermal conductivity lower than that of a material of the tip portion, wherein
• the injection machine is provided with a cooling mechanism to prevent the thermosetting liquid coating agent inside the injection machine from curing,
• the tip portion of the injection machine has an outer circumferential surface configured to be inserted into a mounting hole formed in the mold and a tip surface provided with the injection port,
• the heat insulation layer is provided on the outer circumferential surface of the tip portion so as to contact an inner circumferential surface of the mounting hole,
• a flange portion is provided on the outer circumferential surface of the tip portion of the injection machine so as to be positioned closer to the tip surface than the heat insulation layer provided on the outer circumferential surface,
• an outer diameter of an edge portion of the flange portion is smaller than an outer diameter of a surface of the heat insulation layer, and
• a gap is formed between the edge portion of the flange portion and the mounting hole of the mold.