Plastic Overmolded Big Head Bolts

Cooling and Solidification: After molding, the plastic parts need to be cooled and solidified, usually through water cooling or air cooling. This process ensures the stability and robustness of the plastic covering.

Design and Specifications Determination: You need to clarify the bolt specifications and requirements, including thread type, thread size, head shape and size, overmolded plastic material type and color, etc. These specifications are the basis of the subsequent manufacturing.

Mold Making: According to the design specifications of the bolt, an overmold/insert mold is made to ensure easy demoulding; For metal part, we can build a stamp mold or get the metal parts from markets if they are not standard.

Plastic Injection Overmolding/Insertmolding: Choose a proper plastic injection molding machine, inject the pre-processed plastic into the insert mold which are settled the metal. During the injection molding process, the plastic fills the mold and forms a shell around the bolt.