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Introduction of PVC plate welding method

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Introduction of PVC plate welding method

Date:2017-12-14 Author: Click:

The way of PP plate welding is usually considered that thermoplastic welding is irreversible. A few processes, such as induction welding, can produce reversible assemblies. As for which method should be selected at the beginning, the requirements of the welding method for the design of the parts may be important, and the different welding methods are with the difference.

Hot gas welding technology is usually used to weld plastic pipes, sheets or semi-finished products instead of injection molding parts. However, many thermoplastic molding parts, especially thermoplastic automotive discs, are repaired with hot gas welding technology, and hot gas welding is sometimes used to prepare plastic mold parts. The advertisement board

1. hot plate welding

Hot plate welding (for flat parts) is a thermoplastic welding process that uses electric heating metal mold to make the surface of the connected plastic parts soften. It is suitable for all or large or small thermoplastic parts. It is especially suitable for welding soft semi crystalline thermoplastics, such as PE board or PP board. Because different die surface temperature names can be applied to two different thermoplastic materials, this technology is most suitable for welding different materials. Hot plate welding can achieve high welding strength. But the cycle of this technology may be relatively long, and the small parts need 15s, while the large parts need several minutes.

2. heat gas welding

Hot gas welding is widely used to connect thermoplastic profiles and sheets to produce large parts. It is suitable for smaller injection molding parts, plastic parts repair and sample parts manufacturing. It is important to produce electrodes with polymer brands that are the same as welded parts.

3. extrusion welding

Extrusion welding is a welding method developed from hot gas welding. Automatic welding mainly compared with large scale structure.

4. bonding

The adhesive can be used to connect plastic parts of the same raw material polymer, which is usually used for manufacturing products made of different materials. Make thermosetting products connect to each other, or connect plastic parts to metals.

The advantages of the adhesive include:

It is beautiful, flexible in design; uniform stress distribution; can connect different materials; can provide a tight seal of atmospheric water and gas; soft adhesive can buffer vibration; can be used with thin and soft substrate; provide electrical insulation and thermal insulation.

Various limitations of the adhesive: the uncertainty of the joint performance; permanent assembly; a comprehensive chemical process; the need for a clean surface; no joint inspection; the maximum strength of time.

Binder selection

The selection of adhesives for specific applications depends on the use of environment, stress value, substrate surface chemistry, substrate rigidity, substrate thermal expansion coefficient, filling requirements and application methods.

5. solvent bonding

Solvent bonding is a way to assemble some thermoplastic parts, most commonly used in amorphous thermoplastic products. Solvent bonding is a simple and relatively inexpensive method for forming rigid, amorphous thermoplastic parts. The low viscosity requirement of the solvent is that the bonded parts should be not bent and moulded with relatively tight tolerance.


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