SU1052400A1 - Device for welding thermoplastic materials with tape applied to the joint - Google Patents

Abstract

1. DEVICE. FOR WELDING THERMOPLASTIC MATERIALS USING A TAPE TAPE, containing a base with a bracket on which a tape reel, a heater and a handle are installed, characterized in that, in order to improve the quality of the welded joint, the device is fitted with an object that is attached to a frame and a case wall. fixing with respect to the heater, a docking station for the materials to be welded, installed in front of the heater in the direction of movement of the device, and fixed on the base of the figured plate springs minutes to adjust belt tension, the handle is formed as a lever having one end pivoted on the bracket and is spring-loaded relative to the base, and the other end is fixed heater. 2. The device according to claim 1, characterized in that the working surface of the heater is made with two flats, arranged at an obtuse angle to each other. 3. The device according to claim 1, characterized in that the docking station of the materials to be welded i is made in the form of two wheels mounted at an angle to each other with rubber rims (L mi and with a leaf spring. Sl ND U O

Description

The invention relates to the welding of plastics, in particular to devices for welding with the aid of electric heating elements of thermoplastic materials using a strip applied to the joint.

A device for welding thermoplastic materials is known, comprising a housing with an electrically heated welding roller installed inside it and a handle. To ensure uniform pressure on the films to be welded, the device is provided with an electromagnetic coil with magnetic core 1 placed in the housing.

The disadvantage of this device is that it does not allow welding of polymeric materials without disturbing the structure of the material in the area of the weld and heat-affected zone.

The closest in technical essence and the achieved result to the invention is a device for welding thermoplastic materials using an overlapping tape junction containing a base with a bracket on which a tape reel, a heater and a handle 2J are mounted.

The disadvantage of this device is that the heater is rigidly fixed to the base and is in constant contact with the heated surfaces of the films and the tape applied to them, which, if the device is stopped, can cause overheating of the surfaces being welded. In addition, the device does not provide an exact joining of the films, and the tape guide mounted on the body does not tension it during the welding process, which negatively affects the quality of the welded joint.

The aim of the invention is to increase the quality of the welded joint.

This goal is achieved in that the device for welding thermoplastic materials using an overlapping tape, comprising a base with a bracket on which a tape reel, a heater and a handle are provided, is provided with an abutment mounted on the base with movement and fixation relative to the heater, a docking assembly welded materials, installed in front of the heater in the direction of movement of the device, and fixed on the base with a figured leaf spring to regulate the tension of the tape, ru The handle is made in the form of a lever, one end of which is hinged on the bracket and spring-loaded relative to the base, and a heater is fixed on the other end.

In addition, the working surface of the heater is made with two flats located at an obtuse angle to each other.

The docking assembly of the materials to be welded is made in the form of two wheels mounted at an angle to each other with rubber rims and a leaf spring.

Such an embodiment of the device makes it possible to regulate the pressure on the material, limit the contact time of the heater with the tape and the materials being joined, provides high-quality welding of materials with preservation of their structure.

FIG. 1 shows the proposed device, a general view; in fig. 2 - the same, top view; in fig. 3 - heater, cut; in fig. 4 - the same, front view; in fig. 4 — node I in FIG. one; in fig. 6 - section AA

5 in FIG. one; in fig. 7 is a section BB in FIG. one.

The device for welding thermoplastic materials contains a heater 1, the upper part of which is fixed to the handle 2, made in the form of a lever. The handle 2 of the device together with the heater I can rotate around axis 3 relative to the base of the device consisting of a stand 4, a base 5 and a bracket 6, due to its hinge attachment on the bracket 6. A easily removable coil 7 is placed on the bracket 6 8 of red copper, which, thanks to a dovetail connection, can move along the base 5 as it approaches or moves away from

0 heater 1. The size of the gap between the stop 8 and the heater. M 1 is adjusted by a screw 9 having a micrometric thread and a cone in its lower part entering the counter conical hole made in the stop 8. In the rear lower part a base

5 has a fluoroplastic support 10. To the bracket 6 with screws 11 is attached a U-shaped plate spring 12, extension: you can fold the handle 2 with the heater 1 at an angle of 20 ° up from the position indicated in FIG. 1. Screws AND also serve to fasten the bracket 6 to the rack 4. In the handle 2, a notch is cut, which limits the angle of throwing by the spring 12 of the heater 1 by resting the protrusion of the periphery of the groove into the body of the bracket 6. Handle

5 is provided with a shank, in which there is a micrometer screw 13, which limits the movement of the handle 1 downwards. The screw 13 passes through the hole in the leaf spring 12 and rests on the rack 4. The stand 4 is attached to the base 5 by two bolts 14. The bolts 14 are located on the right side as the device moves during welding. On the left side between the pillar 4 with the bracket 6 and the base 5 there is a gap. The bolts 14 fasten to the stand 6 a figured plastic 5 tine spring 15 regulating the tension of the tape. The force of the spring 15 to the tape of the material for welding and to the base 5 is controlled by a micrometer screw 16. The welding tape, unwound from the coil 7, passes through the groove 17 milled in the upper part of the base 5, and along the stop 8, bends around the latter in its front part, pressing it underneath to the materials to be welded, located on the substrate 18 of the working table 19, and goes under the sub-plate 10 outside the device. A gasket 20 is laid between the pillar 4 and the base 5, which is pressed against the base with a screw 21. The front end of the heater 1 is attached to the docking station of the materials to be welded, consisting of two spaces} {22 wheels 22 with rubber rims and a figured spring at an angle to each other. Heater 1 consists of a massive copper rod 24 of circular cross section in the upper and rectangular section in the lower part . On the cylindrical part of the rod 24 is wound a wire 25 of annealed nichrome, isolated from the rod with a thin layer of mica (the mica in Fig. B is not shown). On top of the wire 25 has a thermal insulation of asbestos 26 and tape 27 of fiberglass. Thermal insulation of the strut in the upper and lower parts with clamps 28. The ends of the wire 25 are brought out through the holes in the upper asbestos- cement washer 29 and fixed to the terminals of the adapter block 30. To the outside the wires of the electrical wiring ZG are brought out through the outer case 32 of the heater and fixed on it by the clamps 33 The outer body 32 of the heater is attached to the handle 2 by screws 34. The heater core 24 is pressed against the substrate 18 of the working table 19 by a spring 35, the compression force of which is adjusted by a screw 36. The washer 29 is fixed to the rod 24 by a screw 37 and secured by turning pin 38. In the lower part of the rod 24, holes for thermo-bows 39 are mirrored. The bottom end part of the rod 24 is insulated with a poronite plate 40. The position of the rod 24 relative to the outer case 32 is fixed by four guide screws 41 and washers 42 and 43. The screws move in oval holes 44, milled in the outer casing 32. The working surface of the heater 1 is made with two flats 45, located at an obtuse angle, for example 120 °, to each other. The width of each stick is 0.3-1 mm and is determined by the time of heat supply to the surfaces being welded and the required relative to the surface temperature of the material in the weld zone. - - - - J, ...-. The device works as follows. The device handle 2 is in the tilted position, and the heater 1 does not touch the substrate 18 of the working table 19. On the substrate 18 of the working table 19, the material 46 is welded. The device is installed on the junction of panels of the material to be welded. Before installing the device on the seam, the tape 47 from the coil 7 is inserted into the shelf between the stand 4 and the base 5 into the groove 17, milled on the upper surfaces of the base 5. Then the tape 47 goes around the front edge of the stop 8, passes under the device and comes out of the device after passing the binder 10. The temperature of the heater is adjusted to the required value and maintained automatically by means of a thermocouple 39. When welding, the operator presses knob 2 down to the stop, simultaneously starting movement of the device along the junction of the welded panels Methods and material. The speed of movement is established empirically and can vary within certain limits, which does not affect the quality of Schva. When the rod 24 contacts the surface of the materials being welded 46, the rod 24 simultaneously touches the surface of the tape 47, pressing it against the front edge of the stop 8. The force of the pressing of the rod 24 to the materials to be welded 46 is controlled by a screw 9. The width of the contact zone of the rod 24, the materials being welded 46 and the tape 47 and the speed of the device along the junction of the welded material panels determine the heating time of the welded materials 46 and the tape 47. After heating, during the movement of the device, the tape 47 falls under the toe of the support 8 and, pressing panels of material, welds them. Welded material comes out from under the toe of the stop 8. The clamping force of the tape 47 to the material surfaces to be welded is created by the operator’s hand. Located on the front wall of the heater 1 node docking welded materials works as follows. When the device moves along the junction of the welded panels of material, the latter, under the action of the rod 24 of the heater, tend to disperse. Wheels 22 with rubber rims, set at an angle of 15 °, chosen experimentally, tend to move the expenditure of the material web to the material intersection line when the device is moving. To prevent the materials being welded from crawling onto each other, a spring 23 presses the materials to be welded to the worktable. The proposed device provides KLL 411 (-tv-iTivys JI ii Ijj Lt h and l., I high-quality welding of films without changing the structure of the material in the weld area, the possibility of welding synthetic fabrics, composite materials and dissimilar materials, as well as reducing assembly time designs of polymeric materials, has a low energy intensity of the welding process.

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Claims (3)

1. A DEVICE FOR WELDING THERMOPLASTIC MATERIALS USING A TAPE JOINED ON A TAPE JOINT, containing a base with a bracket on which a coil with a tape is mounted, a heater and a handle, characterized in that, in order to improve the quality of the welded joint, the device is equipped with a stop mounted on the base with the ability to move and fix relative to the heater, the docking station of the welded materials, installed in front of the heater in the direction of travel of the device, and fixed on the basis of a curly plate spring to regulate the tension of the tape, the handle is made in the form of a lever, one end of which is pivotally mounted on an arm and spring-loaded relative to the base, and a heater is fixed on the other end. 2. The device according to π. 1, characterized in that the working surface of the heater is made with two flats located at an obtuse angle to each other. 3. The device according to π. 1, characterized in that the unit for joining the materials to be welded _ is made in the form of two wheels set at an angle to each other with rubber rims and with a leaf spring. >