Hot-gas welding plastic welding equipment and welding method

Abstract

The invention provides hot-gas welding plastic welding equipment and a welding method. The equipment comprises a base, on which a first frame, a second frame, a third frame and a fourth frame are arranged, wherein a lower slide table and an upper slide table are arranged on the first frame and the second frame, the upper end of the lower slide table is provided with an upper mold clamp, the lowerend of the upper slide table is provided with a lower mold clamp, the third frame and the fourth frame are provided with a middle slide table used to occupy or avoid space positions among the lower slide table and the upper slide table and the lower slide table, and a nitrogen heating middle mold is arranged on the middle slide table. When welding with hot gas welding plastic welding equipment, there is no such problem of poor welding quality after the hot plate is contaminated by plastic parts in hot plate welding, and there is no such problem of friction debris in the process of vibration friction welding. Heated nitrogen is used to heat the welding surface of an upper plastic part and a lower plastic part to the welding temperature for welding then, which costs less than the laser welding. And as long as it is a plastic part, the plastic part can be welded by the equipment to expand the application range of the equipment.

Description

technical field [0001] The invention belongs to the technical field of welding equipment, and in particular relates to a hot gas welding plastic welding equipment and a welding method. Background technique [0002] At present, the methods of plastic welding mainly include hot plate welding, vibration friction welding, laser welding, etc., among which hot plate welding is to melt the plastic parts through the contact between the heating plate and the plastic parts. It will be attached to the hot plate to cause wire drawing, and the contact surface between the plastic part and the hot plate will be uneven. At the same time, the surface of the hot plate will be polluted by the plastic part, and some plastic material will remain, which will affect the welding quality of the plastic part during the re-welding process; The vibration friction welding is to load a certain axial pressure on the welding surface of two plastic parts, and the frictional heat generated by the violent fri...

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Problems solved by technology

[0002] At present, the methods of plastic welding mainly include hot plate welding, vibration friction welding, laser welding, etc., among which hot plate welding is to melt the plastic parts through the contact between the heating plate and the plastic parts. It will be attached to the hot plate to cause wire drawing, and the contact surface between the plastic part and the hot plate will be uneven. At the same time, the surface of the hot plate will be polluted by the plastic part, and some plastic material will remain, which will affect the welding quality of the plastic part during the re-welding process; The vibration friction welding is to load a certain axial pressure on the welding surface of two plastic parts, and the frictional heat generated by the violent friction movement will weld the welding surfaces of the two plastic parts together. Due to the severe friction, usually at the end of welding Sometimes it will be found that the welding surface of the two plastic parts has dropped a lot of plastic debris due to friction. These debris will be scattered on the tooling or bonded to the welding surface of the plastic parts. It is difficult to be completely removed, and there will be damage to the product. It will have a great impact, and it will produce a lot of noise during the welding process, which will cause certain damage to the health of the operator; laser welding is to first press the welding surfaces of the two plastic parts together with a low pressure, and then pass The concentrated radiation waves generated by the laser melt the welding surface of the plastic parts, thereby welding the two plastic parts together. Laser welding has certain requirements for the material of the plastic parts. Two kinds of plastic parts welded together, one plastic part The material must be transparent to the laser, and the material of another plastic part is opaque to the laser, so that laser welding can be realized, and the cost of laser welding is relatively high

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