SU1435481A1 - Apparatus for welding polymeric films - Google Patents

Abstract

The invention relates to the processing of plastics and can be used to make bags with a flat bottom. The goal is to improve the quality of welding. For this, the device is equipped with a horizontal plate with sliders mounted on its corners in the slots. The lever-hinge system is made up of mounted on a cross-beam mounted on the power drive, cams and two shoulders, one end of which is connected with the sliders, and the other with cams. The sleeve blank is flattened with sliders on the plate. 4 il.

Description

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The invention relates to the processing of plastics into articles and can be used in devices for the manufacture of flat-bottom bags from polyethylene film.

The purpose of the invention is to improve the quality of welding.

FIG. 1 shows the scheme of the proposed device; in fig. 2 — node I in FIG. one; in fig. 3 is a view A of FIG. one; in fig. 4 shows a section BB in FIG. 2

The device comprises a rotary table 1 with mechanisms 2 that open the sleeves and a plate 3 fixed on the latter, mounted on it. A bracket 4 with a welding head 5 is mounted above the table 1. The head is connected to the pneumatic cylinder 6.

The mechanism 2 for opening the sleeves is made in the form of a lever-hinge system, containing w, her two shoulders levers 7, seated on the axis 8 and equipped with a roller 9, in contact with the cam 10, mounted on the traverse 11, interacting with the force actuator - pneumatic cylinder 12 .

The other ends of the arms 7 are associated with sliders 13 installed in the slots 14 of the plate 3 and the spring-loaded springs 15.

The device works as follows.

The pneumatic cylinder 12 raises the yoke 11 together with the cams 10 turning the two shoulders levers 7 around the axis 8. At the same time, the sliders 13, having overcome the resistance of the springs 15, are reduced.

On the mechanism 2 of the disclosure sleeves wear sleeve billet 16 of polyethylene film.

With the help of a pneumatic cylinder 12 lower the yoke 11 with the cams 10, releasing

yes, levers 7. Under the influence of springs 15, the slide blocks 13 move beyond the contours of the plate 3, abutted against the workpiece 16, straightened without stretching the warping.

On the plate 3, the edges of the blank are folded over to form a flat bottom 17, onto which strip 18 is placed, and fix them with the help of the tool 19. Turning table 1 is turned one position. The mechanism 2 with the workpiece 16 is under the welding head 5. With the help of the pneumatic cylinder 6, the welding head 5 is lowered and the thermoplastic material is straightened by welding the strip 18 to the workpiece 16. The turntable 1 is turned and the mechanism is in the initial position. Under the action of the pneumatic cylinder 12, the slide blocks 13 are reduced, freeing the manufactured bag 19, which is removed from the plate 3. A new hose blanket 16 is put on the mechanism 2, and the cycle is repeated.

Claims (1)

Invention Formula A device for welding polymer films containing a welding head and a ruler opening mechanism in the form of a lever-hinged spring-loaded system associated with the force drive of its expansion, characterized in that, in order to improve the quality of welding, it is equipped with a horizontal plate with its corners slider slots, and the lever-hinged system is designed as mounted on a traverse mounted on a power drive, cams and two-arm levers, one end of which is connected with the slides and the other end with cams. . one / / 2 f1 FIG. 2 18 / Vida -J - / fpL / g d VU2. /