Which TPE is good for Fujian overmolding fireproof material?

TPE overmolding injection generally uses two-shot injection molding process,

Transparent TPE is used in stationery, sports equipment, etc., and has good UV resistance, chemical resistance, and is easy to color and process.

The thickness of TPE/TPR overmolding layer. In most overmolding applications, a wall thickness range of 1.5-3.0mm ensures good adhesion. If the TPE layer is too thin, injection molding is more difficult, adhesion strength is lower, and hand feel is poor. If the TPE layer is too thick, on the one hand cost is higher, on the other hand defects such as shrinkage and bubbles are prone to occur.

Overmolding fireproof material TPE

The hard plastic parts that have been injection molded are fixed onto the overmolding mold, and then at a suitable temperature, the TPE soft rubber is injection bonded onto the hard plastic parts, and after cooling, the product is obtained. The injection temperature for overmolding bonding varies depending on the hard plastic material used for overmolding.

TPE overmolding injection generally uses two-shot injection molding process, that is, fixing the injection molded hard plastic parts onto the overmolding mold,

The wall thickness of the TPE layer should be as uniform as possible to achieve the best molding cycle. The transitions between different wall thicknesses should be gradual to reduce problems caused by fluid flow, such as gas marks and air bubbles.

In order to produce the matte appearance of thermoset rubber surfaces, a rougher mold surface is required. Generally speaking, the rough surface produced by electrical discharge machining (EDM) of the mold cavity will result in an excellent workpiece appearance and make demolding easier. Abrasive methods such as steam blasting, sandblasting, or shot blasting, as well as chemical etching, can also be used to produce surfaces with different gloss and appearance.

Overmolding fireproof material TPE

Then at a suitable temperature, the TPE soft rubber is injection bonded onto the hard plastic parts, and after cooling, the product is obtained. The injection temperature for overmolding bonding varies depending on the hard plastic material used for overmolding.

When using a standard injection molding machine for two-shot overmolding on nylon, it is recommended that before overmolding,

Transparent TPE is used in home appliance casings, handles and grips, etc., and exhibits a very good hand feel, with anti-slip and effort-saving properties, and is easy to color and process. It also has a wide design space.

Olefin-based transparent TPE has good weather resistance and ozone resistance, so it has become the fastest-growing variety of TPE, and it mainly serves as the primary rubber material in fields such as automotive and home appliances.

Overmolding fireproof material TPE

First, preheat and bake the nylon parts, because nylon has strong water absorption, and overmolding requires a higher molding temperature; preheating before overmolding can remove moisture, facilitating quick hot overmolding.