TPE, as a new type of polymer material, can be overmolded with PP, ABS, PC, etc. to improve the appearance and softness of the product, so that the product has a better feel and performance. TPE covered metal parts refers to the metal surface layer covered with a layer of soft rubber material, can play a non-slip, shock absorption, corrosion and so on. Below Plastic Bur Wang TPE overmolded suppliers to us summarize the two TPE overmolded metal overmolded way:

　　First, without the aid of adhesives, directly through the injection molding, to complete the adhesive bonding with the metal. Class of processing methods, usually TPE and metal parts is the whole package, and TPE hardness as high as possible, in order to achieve a certain adhesive effect, because TPE and metal package, there is no real meaning (chemical and molecular level) on the bonding, completely with the help of a certain degree of strength of the TPE, will be wrapped up with the metal. In addition, the surface of the metal parts have grooves, holes (such as nuts, shanks), will be more conducive to the formation of TPE and metal parts of a relatively strong bond.

　　Second, through the adhesive bonding. Sometimes some special products, rubber material only partially covered metal parts of the corresponding position, so that it is not conducive to the formation of a more solid combination of TPE and metal parts. Through the metal surface to be wrapped in the position of the adhesive, coated with a layer of adhesive, is a common idea. But in fact, due to the different molding process of TPE and rubber, it has an important effect on the firmness of the bond between rubber and metal parts. The selection of the type of adhesive is very important for the overmolding of this type of metal products. In addition, the structure of the metal to be overmolded and the hardness of the TPE are also factors that need to be considered and evaluated.

　　TPE overmolding should pay attention to the problem:

　　1, TPE and hard bonding components of the compatibility needs to be matched, the molecular solubility is close to the molecular compatibility is better.

　　2, in the design need to try to avoid sharp corners, to ensure that TPE and hard rubber contact excellent, enhance the bonding effect.

　　3, through the appropriate exhaust to avoid leaving gas in the mold cavity.

　　4, so that the thickness of the TPE and the expected sense of touch to achieve a balance.

　　5、Maintain the temperature of TPE melt to ensure the bonding effect.

　　6, TPE material overlay molding need to be baked and then processed, in order to reduce the product surface water lines, to obtain the effect of uniform surface color.

　　7, choose the color masterbatch and its carrier resin and TPE and structural components are compatible with the material.

　　8, for the smooth surface should be special treatment, the purpose is to increase the soft glue and hard glue adhesive contact surface, strengthen the bonding effect;.

　　9, TPE should have good fluidity, because the thickness and size of the TPE adhesive layer is very small, TPE usually need to flow through a longer path and thin-walled area to fill the mold.