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Advantages of insert injection molding

1) The combination and supplement of the plasticity and elasticity of plastic and the rigidity, strength and heat resistance of metal can firmly make complex and exquisite metal plastic integrated products; Reduce the size and weight of products;

2) The combination of plastic insulation and metal conductivity can meet the basic functions of electrical products; It can also meet some special requirements, such as magnetic conductivity, wear resistance and fastening;

3) Adding metal inserts into the plastic can improve the strength of the plastic parts;

4) Injection molding of inserts increases the flexibility of product design and provides new possibilities for the combination of plastic, metal and other parts;

5) Avoid secondary processing such as hot melting, welding and riveting, which can shorten the assembly time and reduce the cost;

6) Inserts are not only metal, but also cloth, paper, wire, plastic, glass, wood, coil, electrical parts and plastic parts;

7) For rigid molding products and bending elastic molding products on the rubber sealing pad, the complex operation of arranging the sealing rings can be omitted after the products are molded into one by injection molding on the substrate, which makes the automatic combination of the subsequent processes easier;

8) Because it is the combination of molten plastic and metal inserts, the gap of metal inserts can be designed narrower and the product reliability is higher than that of press in molding; It is easier to pass vibration and other tests;

9) Select appropriate plastics and molding conditions, that is, products that are easily deformed and damaged (such as glass, coils, electrical components, etc.) can also be sealed and fixed through plastics;

10) If proper mold structure is selected, insert products can also be completely enclosed in plastic.

11) With the combination of vertical injection molding machine, manipulator, and insert product line device, most insert molding projects can achieve automatic production.

Disadvantages of insert injection molding

1) The placement of inserts usually complicates the mold structure, prolongs the injection molding cycle, increases the manufacturing cost, and increases the difficulty of automatic production;

2) The coefficient of thermal expansion of the insert is inconsistent with that of the plastic, which is easy to cause internal stress of the product, resulting in product fracture;

3) Or the thermal expansion coefficient of the insert is inconsistent with that of the plastic, resulting in product deformation;

4) Inserts often need preheating or drying treatment to reduce internal stress;

5) The insert must be firmly fixed in the mold, otherwise it is easy to shift or deform under the impact of molten materials;

6) Once the injection molding of inserts produces defective products, such as defective injection molding, missing inserts, poor location, etc., the entire product will be scrapped and the cost will be huge;

7) Injection molding of inserts is not conducive to product recycling and scrap.