Injection molding device for wrapping wires with three-color spiral insulation layers and three-color wires

An injection molding device for wrapping wires with three-color spiral insulation layers, comprising a spinning block (9), a fixed mould (20), and a handpiece (15) that are coaxially mounted, wherein:

• each of axes of these three components is provided with a center bore (2) for wires (1) passing through;
• a spinning block is entangled by a mould temperature cap (30), the rear end of the mould temperature cap (30) being coupled to an outer periphery of the fixed mould (20);
• a front end of the spinning block (9) goes through a front end of the mould temperature cap (30) and an outer periphery of the spinning block (9) is socketed by a gear (3);
• a bearing is arranged between the mould temperature cap (30) and the spinning block (9);
• the spinning block (9) rotates around the axes with the rotation of the gear (3);
• a third plastic feeding pipe (10c) is arranged between a side wall of the handpiece (15) and a center bore thereof;
• a first plastic feeding pipe (20a) and a second plastic feeding pipe (20b) are arranged between a side wall of the fixed mould (20) and a front end face thereof;
• a rear end face of the spinning block (9) is provided with a first carrier ring (40a) that is coupled to the first plastic feeding pipe (20a) and a second carrier ring (40b) that is coupled to the second plastic feeding pipe (20b);
• a first feeding channel is arranged between the first carrier ring (40a) and the center bore at the axes of the spinning block (9);
• and a second feeding channel is arranged between the second carrier ring (40b) and the center bore at the axes of the spinning block (9).