Insert Molding

• Posted by FOW com December 11, 2025 Filed in Personal #injection moulding  16 views
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  Insert molding is one category of injection molding that allows preformed parts or components, usually metal inserts, to be inserted into the plastic molded parts and to have a final product in one-step process. Insert moulding has characteristics as below:

  A combination of two parts, preformed components (metal threaded inserts) and plastic molded parts (plastic resin);
  One-step process is executed and avoids secondary assembly operations;
  Insert the components into the parts to increase the functionality for the whole part.
  As a professional insert molding supplier, insert molding factory, Keyplast injection molding supplier also offer different varieties of injection mold toolings such as two shot molding, overmolding injection molding and materials used in injection moulding according to  your different needs.

  Insert Molding Process
  Firstly, prepare the finished molds well with preformed parts, like threaded inserts. Secondly, inject the melted plastic resins into the molds to create a whole part with threaded inserts. After sufficient cooling, the molded parts with threaded inserts will be ejected out. Insert molding process has key factors as below:

  Preparation for the inserts                                                            
  Material selection for the main parts                                                      
  Melting temperature for injection                                        
  Cooling time before moulds open                                                
  Testing for the inserted plastic parts

  What is Insert Molding?
  What is insert moulding: Insert molding is a manufacturing process in which a preformed part (usually metal) is remolded using a heated thermoplastic resin to produce a single unit, called metal insert molding. Molded inserts can be simple objects, such as rods, threads, or blades, but they can also be complex.

  There are many cases where this manufacturing method is needed to enhance the mechanical properties of plastic parts. The plastic molding process requires very high precision to ensure the correct molding of the final plastic part. Even the slightest deviation can completely destroy the results, so very strict quality control procedures are required. In fact, the insert molding process is closely related to the interface between the machine and the tool. Some high-precision machines can meet even the most demanding requirements of precision and reliability that only insert moulding can meet.

  Insert Molding FAQs
  1. What is the Difference Between Overmolding and Insert Molding?
  Overmolding is a process of molding one material on another. The first component is  

  made in an injection mold and then placed in the second mold, where overmolding material is added. Insert molding is a subset of custom injection molding technology, similar to overmolding. Before the actual injection molding, the metal part is put into the mold cavity, and the insert is accurately positioned in the mold by manual operation or mechanical arm. Then the mold is closed and the plastic is molded on the insert to form a part.

   

  2. What's the Key Benefit of Insert Molding in Manufacturing?

  Cost-Effectiveness

  Enhanced Strength and Durability

  Increased Design Flexibility

  Improved Production Efficiency

   

  3. What's the Application of Insert Molding?

   

  As one of insert molding suppliers, we will do our best to meet all the needs of customers.

   

  If you are looking for a reliable china plastic mold factory, please choose us, and we will be your best to meet all the needs of customers.