Edge sealing method and device for soft plastic circulation box special for tobacco

Abstract

The invention discloses an edge sealing method for a soft plastic circulation box special for tobacco. The soft plastic circulation box comprises a cuboid box body side wall and flap covers connected to the upper and lower ends of the box body side wall. The edge sealing method comprises the steps that heating and hot melting are carried out on the transverse edges and the end faces of the flap covers, and arc rolling wheels are adopted for rolling the edges and the end faces, obtained after hot melting is carried out, of the flap covers, and the formed transverse end faces of the flap covers are in a smooth arc shape. The edge sealing device comprises a support. A heating device, the first rolling wheel and the second rolling wheel are sequentially installed on the support linearly. The heating device is provided with an inward-concave heating groove. The circumferential face of the first rolling wheel and the circumferential face of the second rolling wheel are provided with a first rolling arc groove and a second rolling arc groove respectively. The transverse end faces of the flap covers with the sealed edges are in a smooth arc shape. On the one hand, the strength of the end faces of the flap covers can be enhanced, edge collapsing and deformation will not be caused, and the service life of the soft plastic circulation box is prolonged; on the other hand, the end faces of the flap covers with the sealed edges are smooth with no burrs, the wrist of a user will not be cut, and the using safety is improved.

Description

technical field [0001] The invention relates to a packaging box, in particular to an edge-sealing method and edge-sealing equipment for a special soft plastic turnover box for tobacco. Background technique [0002] The tobacco-specific soft plastic turnover box made of PP hollow board has the advantages of waterproof, moisture-proof, acid and alkali resistance, and high conversion times, and has been widely used by domestic tobacco companies. The current soft plastic turnover box is formed by cutting and welding a whole piece of PP board. The horizontal sides of the upper and lower flaps of the turnover box are not edge-sealed. On the one hand, the lateral edges of the flipped lid are relatively sharp. During use, it is easy to cut the workers. Wrists, etc. On the other hand, the edges of the upper and lower flaps are prone to collapse and deformation, which affects the service life of the product. Contents of the invention [0003] In order to overcome the deficiencies o...

AI Technical Summary

Problems solved by technology

The current soft plastic turnover box is formed by cutting and welding a whole piece of PP board. The horizontal sides of the upper and lower flaps of the turnover box are not edge-sealed. On the one hand, the lateral edges of the flipped lid are relatively sharp. During use, it is easy to cut the workers. Wrists, etc. On the other hand, the edges of the upper and lower flaps are prone to collapse and deformation, which affects the service life of the product

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