A manufacturing method for an insulated screwdriver bit, the method comprising:
- material placing, mold closing, material injecting, mold opening, and sealing, to complete production of the insulating screwdriver bit;
- wherein:
- the step of material placing is achieved by placing a screwdriver bit into a mold;
- the screwdriver bit is formed through metalworking, and comprises a head section, a middle section, and a tail section, and an outer diameter of the head section is larger than that of the middle and tail sections, and the tail section has an end opening;
- the mold comprises an upper mold and a lower mold, the upper mold has a first mold cavity, and the lower mold has a second mold cavity;
- a through-hole is formed and divided between one corresponding end of each of the upper and lower molds, and a positioning pin capable of entering or exiting from the first and second mold cavities is inserted in the through hole;
- another end of the lower mold has a baffle wall, and a bottom surface of the lower mold has a plurality of feeding ports for entering the second mold cavity and a first ejector pin and a second ejector pin are inserted;
- when the screwdriver bit is inserted into the second mold cavity of the lower mold, the first and second ejector pins respectively support the head and tail sections within the second mold cavity, ensuring the screwdriver bit remains horizontal and effectively separating the middle and tail sections from an inner wall of the second mold cavity;
- the step of mold closing is achieved by the upper and lower molds moving closer together to align the first and second mold cavities to ensure that the middle and tail sections remain separated from the inner wall of the first mold cavity;
- the positioning pin is inserted into the end opening through the through-hole to secure the screwdriver bit between the baffle wall and the positioning pin, to ensure that even after the second ejector pin retracts, the screwdriver bit remains horizontally positioned, preventing wobbling or tilting;
- the step of material injecting is achieved by injected a first insulating material into the first and second mold cavities through the feeding ports, completely covering the middle and tail sections within these cavities to form an insulating layer on the middle and tail sections;
- the step of mold opening is achieved by separating the upper and lower molds, combined with the retraction of the positioning pins and the lifting of the first and second ejector pins, allows the screwdriver bit with the insulating layer to be removed from the mold;
- when the positioning pins retract, a working hole is formed in the insulating layer, and this working hole is directly connected to the port;
- and
- the step of sealing is achieved by filling the end opening and the working hole with a second insulating material to form an insulating clog, thus sealing the end opening and the working hole;
- by simultaneously covering the metal middle and tail sections with the insulating layer and the insulating clog, the insulated screwdriver bit is formed.