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Changshu smoothly da plastic products factory talk about six major factors affecting the quality of plastic welding
by：CSSSLD
2021-01-23
Commonly used plastic electrode are mainly PE, PVC, PP, not plastic welding, only thermoplastic welding, such as plastic material, plastic pipe material is thermoplastic, thermosetting plastic can't be welded, thermosetting plastic cement.
Plastic welding in the welding need to pay attention to what conditions?
Changshu well below da plastic products factory to talk about the six major factors affecting the quality of plastic welding!
1, pressure
the appropriate pressure on the surface of a welding, welding material will transition from elastic to plastic, and can also promote the molecular diffusion in the crowded to weld residual air, thereby increasing welding face seal performance. If not downward when welding, or electrode drawing is too big, often can cause cracking.
2, time,
to have appropriate hot melt time and enough cooling time. When thermal power must have enough time there will be a virtual welding, time is too long can cause deformation of the weldment, slag overflow, and sometimes appear in the welding place hot spot ( Color) 。 Must ensure that the welding surface to absorb enough heat to reach the molten state fully, to guarantee full diffusion fusion between molecules, and at the same time must ensure that adequate cooling time to achieve sufficient strength in weld.
3, melting amount
hot melt time and thermal power coordinate adjustment will be the most appropriate amount of molten, ensure enough intermolecular fusion, eliminate the phenomenon of welding. In addition to welding equipment and operating personnel skill levels, come to the plastic internal or external factors, has certain influence to the welding quality, should be taken seriously.
4, and other factors,
plastic hygroscopicity
if welding wet plastic products, containing water will be turned into vapour when heated ran out and appear bubbles on the surface of the weld, the welding face seal performance. Hygroscopic serious material with PA, ABS, PMMA, etc. The use of these materials in products, it must be dry before welding processing.
5, plastic filler in the
such as glass fiber, talc, mica, they changed the material physical properties. The content of the filling material in plastic with weldability and the welding quality of plastic has a lot to do. Filler content is less than 20% of plastic can be normal welding, don't need to do a special treatment. Filler content exceeds 30%, due to lack of surface plastic ratio of intermolecular fusion is not enough, will reduce the sealing.
6, welding surface cleaning,
welding surface must be clean without impurities, to guarantee the welding strength and enough air tightness.
in selecting the right welding materials and eliminate the influence of welding effect of disadvantage factors, but also according to the shape of the products of the material, the cost of taking appropriate welding method.
1, pressure
the appropriate pressure on the surface of a welding, welding material will transition from elastic to plastic, and can also promote the molecular diffusion in the crowded to weld residual air, thereby increasing welding face seal performance. If not downward when welding, or electrode drawing is too big, often can cause cracking.
2, time,
to have appropriate hot melt time and enough cooling time. When thermal power must have enough time there will be a virtual welding, time is too long can cause deformation of the weldment, slag overflow, and sometimes appear in the welding place hot spot ( Color) 。 Must ensure that the welding surface to absorb enough heat to reach the molten state fully, to guarantee full diffusion fusion between molecules, and at the same time must ensure that adequate cooling time to achieve sufficient strength in weld.
3, melting amount
hot melt time and thermal power coordinate adjustment will be the most appropriate amount of molten, ensure enough intermolecular fusion, eliminate the phenomenon of welding. In addition to welding equipment and operating personnel skill levels, come to the plastic internal or external factors, has certain influence to the welding quality, should be taken seriously.
4, and other factors,
plastic hygroscopicity
if welding wet plastic products, containing water will be turned into vapour when heated ran out and appear bubbles on the surface of the weld, the welding face seal performance. Hygroscopic serious material with PA, ABS, PMMA, etc. The use of these materials in products, it must be dry before welding processing.
5, plastic filler in the
such as glass fiber, talc, mica, they changed the material physical properties. The content of the filling material in plastic with weldability and the welding quality of plastic has a lot to do. Filler content is less than 20% of plastic can be normal welding, don't need to do a special treatment. Filler content exceeds 30%, due to lack of surface plastic ratio of intermolecular fusion is not enough, will reduce the sealing.
6, welding surface cleaning,
welding surface must be clean without impurities, to guarantee the welding strength and enough air tightness.
in selecting the right welding materials and eliminate the influence of welding effect of disadvantage factors, but also according to the shape of the products of the material, the cost of taking appropriate welding method.
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