Insert Molding

Insert Mold Advantages

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  Multifunctional Product Manufacturing

  Combining different material properties: Inserts of hard materials such as metal and ceramic can be combined with plastic. For example, when manufacturing the sensor housing of an automobile, the insulation and easy formability of plastics are combined with the conductivity of metal inserts, so that the sensor housing can protect the internal electronic components from the external environment (such as waterproof and dustproof), and can also realize signal transmission through metal inserts.
  Realize complex function integration: By placing inserts of different shapes and functions in the mold, multiple functions can be integrated in one injection molding process. For example, a metal insert with anti-slip texture is added to the plastic handle mold of an electric tool, and a conductive component that can be connected to the internal motor can also be embedded, so that the handle has a good grip and can realize the conductive function, meeting the complex use requirements of the product.

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  Enhance Product Quality and Reliability

  Firm bonding method: During the injection molding process, the plastic melt fills the mold cavity under high pressure and wraps the insert. When the plastic cools and solidifies, due to the principle of thermal expansion and contraction, the plastic will tightly hug the insert to form a tight and firm bond. This combination makes it difficult for the insert to loosen or fall off during the use of the product. For example, a metal nut is embedded in the plastic shell of an electronic product for subsequent circuit board installation and other operations. During the transportation and use of the product, the metal nut can be stably fixed in the plastic shell to ensure the assembly accuracy and reliability of the product.
  Reduce the number of parts and assembly errors: Using insert mold can integrate the functions of multiple parts into one injection molded product. Compared with the traditional method of manufacturing each part first and then assembling it through mechanical connection (such as screw connection, riveting, etc.) or glue bonding, insert injection molding reduces the assembly links between parts. For example, if insert injection molding is used to produce a plastic gear with a metal shaft, assembly errors such as non-concentricity between the shaft and the gear that may occur in the traditional assembly method can be avoided, and the quality stability of the product can be improved.

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  Improve Production Efficiency

  One-time molding process: Insert mold is a one-time injection molding process. After the insert is placed in the mold, the product with the insert can be produced through a single injection molding operation. Compared with the method of manufacturing the insert and the plastic part separately and then assembling them, this greatly shortens the production cycle. For example, when producing plastic daily necessities with decorative metal sheets (such as plastic combs with metal brand logos), the use of insert injection molds can directly mold the metal sheet and the comb body at one time, reducing the subsequent additional processes such as pasting the metal sheet and improving production efficiency.
  Great potential for automated production: This mold can be easily matched with automated injection molding equipment if it is designed reasonably. The insert can be accurately placed in the mold by an automated robotic arm, and then the injection molding operation can be performed to achieve efficient and continuous automated production. For example, in some large plastic product production factories, for insert injection products with regular shapes and mass production (such as plastic bottle caps with metal inserts), automated production lines can be used to produce a large number of qualified products per hour, improving the economic efficiency of production.