Rotary sealing and cutting device

Abstract

The invention relates to a rotary sealing and cutting device capable of achieving high-speed sealing and cutting. The rotary sealing and cutting device comprises a rack, an upper sealing and cutting mechanism and a lower sealing and cutting mechanism, wherein the sealing and cutting mechanisms carry sealing and cutting actions, each sealing and cutting mechanism comprises a rotating shaft, a rotating seat and a sealing and cutting assembly, each rotating seat is connected to the corresponding rotating shaft, each rotating shaft is in transmission connection with a power source driving the corresponding rotating shaft to rotate, each sealing and cutting assembly comprises a sealing knife, a knife holder, a sliding block, a guide wheel seat and guide wheels, and an upper guide plate and a lower guide plate are arranged on the rack. According to the rotary sealing and cutting device, the upper sealing and cutting mechanism and the lower sealing and cutting mechanism are adopted, impact loads generated by existing horizontal reciprocating motion are avoided, a D-shaped annular groove is combined, the sealing knife is made to move along the D-shaped track, and therefore the sealing timeis prolonged, a packaging film can still obtain the optimal heat sealing effect at a high speed, and the sealing air tightness requirement is met.

Description

technical field [0001] The invention relates to a packaging machine, in particular to a sealing and cutting device (also called an end sealing device) of the packaging machine. Background technique [0002] Such as Figure 6 As shown, the pillow bag is a kind of plastic packaging bag that is often used in daily life, such as bread, chocolate, medicine tablets and other items are packaged in this form of packaging bag. This kind of pillow bag is made by a pillow packaging machine. The production process is as follows: a roll of plastic film is pulled out, and shaped by a shaper to form a shape that wraps the item. At this time, the two sides of the plastic film Overlap together, then enter the middle sealing process, the overlapping part of the plastic film is heat-sealed by the middle sealing device, so that the two sides of the plastic film are heat-sealed together to form a transverse sealing edge, and finally the plastic film enters the end seal In the process, the plast...

AI Technical Summary

Problems solved by technology

The existing end sealing device on the market includes two upper and lower heat sealing components. The upper heat sealing component includes a sealing knife and a cutter, and the lower heat sealing component includes a sealing knife and a knife groove. The upper and lower sealing knives are pressed together to achieve sealing. , and the cutting knife cooperates with the knife groove to realize cutting. However, the existing end sealing device is usually a single-knife reciprocating sealing device. Type movement will inevitably form a large impact load, so a series of structures to eliminate impact and balance load must be provided, which also increases the difficulty of processing and assembly

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