Method of forming set pin hole of insulated carbine hook

A method of forming an insulated carbine hook, which comprises the steps of:

• A) providing a core material which has a perforation and a recess;
• and
• B) putting the core material in a mold cavity of a mold which comprises a movable pin protruding from an inner surface of the mold cavity, wherein the movable pin is disposed on an axial extension line the perforation of the core material;
• an outer diameter of the movable pin is smaller than an inner diameter of the perforation;
• filling an insulated material in the mold cavity, wherein the insulated material is filled between an outer surface of the core material and the inner surface of the mold cavity as well as filled in the perforation and the recess to form an insulated intermediate that coats the outer surface of the core material and the perforation as well as the recess;
• removing the movable pin and taking out the core material coated with the insulated intermediate, wherein the insulated intermediate has a notch formed by removing the movable pin;
• the notch corresponds to an opening of the perforation;
• and
• aiming a removal tool at the notch, and removing the insulated material in the perforation by the removal tool, and furthermore removing the insulated material in the recess by the removal tool, so as to form a set pin hole.