Thermally-sealing and spot-breaking device of bag making machine

Abstract

The invention discloses a thermally-sealing and spot-breaking device of a bag making machine. The thermally-sealing and spot-breaking device of the bag making machine is characterized by comprising an upper fixed plate, an upper movable plate, a positioning plate, a lower movable plate and a lower fixed plate which are arranged from the top to the bottom, wherein an upper movable plate driving device and a lower movable plate driving device are fixed on the upper fixed plate and the lower fixed plate respectively; the upper movable plate driving device and the lower movable plate driving device are connected with and drive an upper movable plate and a lower movable plate to move up and down respectively; a thermally-sealing knife pointing to the positioning plate is fixed on the upper movable plate; a spot-breaking knife pointing to the positioning plate is fixed on the lower movable plate; and a spot-breaking knife moving slot for the spot-breaking knife to run through is formed in the positioning plate and corresponds to the spot-breaking knife below. The thermally-sealing and spot-breaking device of the bag making machine has the advantages as follows: thermally-sealing and spot-breaking processes in a general bag making technology are integrated into one device, so that the thermally-sealing and spot-breaking processes are performed synchronously, the mechanical structure is optimized, the production efficiency is improved, and precise positioning of the edge sealing distance between a thermally-sealing line and a spot-breaking line is achieved at the same time.

Description

technical field [0001] The invention relates to a multi-layer co-extruded heat-shrinkable film back-end production equipment, in particular to a heat-sealing breaking device for a bag-making machine. Background technique [0002] Heat-shrinkable high-barrier food packaging film is mainly used in the packaging of cold fresh meat and seafood. The heat-shrinkable film bag making equipment on the market basically includes heat-sealing and point-breaking processes, and heat-sealing and point-breaking processes are mostly divided into Two processes are carried out. Due to the elongation of the manufacturing process, it is very easy to cause the heat-sealing line to be inconsistent with the dotted line of the subsequent sequence, or even skewed and misplaced with the dotted line, resulting in unqualified, unattractive and inconsistent appearance of the formed bag; how to Realizing the heat sealing of the shrink film and minimizing the edge distance after the heat sealing line of th...

AI Technical Summary

Problems solved by technology

[0002] Heat-shrinkable high-barrier food packaging film is mainly used in the packaging of cold fresh meat and seafood. The heat-shrinkable film bag making equipment on the market basically includes heat-sealing and point-breaking processes, and heat-sealing and point-breaking processes are mostly divided into Two processes are carried out. Due to the elongation of the manufacturing process, it is very easy to cause the heat-sealing line to be inconsistent with the dotted line of the subsequent sequence, or even skewed and misplaced with the dotted line, resulting in unqualified, unattractive and inconsistent appearance of the formed bag; how to Realizing the heat sealing of the shrink film and minimizing the edge distance after the heat sealing line of the product during the heat sealing point breaking process is a major problem in the industry at present. Therefore, it is imminent to change the design of the mechanical structure of the original equipment. It is of great significance to successfully develop an unbiased heat-sealing breaking device suitable for plastic film bag making machines

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