Fill packaging method and fill packaging machine for liquid packing material

Abstract

In a method for forming a lateral sealed portion, a liquid packing material can be filled without biting bubbles, granulates and so on included in the liquid packing material into the lateral sealed portion. In a method for forming a lateral sealed portion with a pair of lateral sealing rolls after a packaging film fed and run is folded at its central portion and a vertical sealing is performed at their side edge parts to shape into a cylindrical form and a liquid packing material is filled into an inside of the cylindrically formed packaging film, at least a folded side part of the cylindrically formed packaging film is pushed with a pushing means arranged between heat sealing bars located at equal intervals in a circumferential direction of the lateral sealing roll and the lateral sealed portion is formed at a pushed position with the pair of lateral sealing bars.

Description

TECHNICAL FIELD[0001]This invention relates to a method for fill packaging a liquid packing material and a fill packaging machine utilizing such a method, and more particularly to a fill packaging method and fill packaging machine capable of blocking intrusion of a liquid packing material into a lateral seal portion.RELATED ART[0002]Recently, it is widely general to automatically fill and package a liquid packing material such as food and drink, seasonings, medicines, cosmetics or the like, a viscous material, powder, granulates or other material with a soft packaging film.[0003]In an automatically fill packaging machine for such a packing material, for example, as described in Patent Document 1, a packaging film having a laminated structure comprised of a uniaxially or biaxially oriented base film layer and a non-oriented sealant layer or a packaging film having a single layer structure of partly coating a heat-sensitive adhesive layer onto a base film layer is folded at a central ...

AI Technical Summary

Benefits of technology

The invention provides a method and machine for packaging liquid materials using a cylindrical film. The method includes using a push plate or push bar to prevent the liquid packing material from sucking into the sealed areas of the film, which can cause damage or slow down production. The push plate or push bar can be adjusted based on the film thickness, liquid packing material, package body size, and other factors to ensure effective prevention of biting and sucking. The machine includes a squeezing means to temporarily block the movement of the liquid packing material and a gas blowing port to further prevent biting. The invention improves the efficiency and prevents damage to the liquid packing material during packaging.

Problems solved by technology

In such a conventional fill packaging machine, when the lateral sealed portion is formed by the pair of lateral sealing rolls as mentioned above, the folded portion of the packaging film becomes at a bulging state due to spring back from the formation of one lateral sealed portion to the formation of next lateral sealed portion, and hence there is a fear that the filled liquid packing material is sucked upward along the folded side through a capillary action and intruded into the next lateral sealed portion to cause poor sealing.

In the formation of the lateral sealed portion, lateral sealing is performed by the heat sealing bars on the lateral sealing rolls while pushing out the packing material in the cylindrically formed packaging film, whereby the intrusion of the packing material into the lateral sealed portion is suppressed but is not sufficient.

Especially, when the packing material contains granulates as used in dressing for example, there is a fear that the granulates cannot be pushed out by the heat sealing bars and may be intruded into the lateral sealed portion.

If the granulates are intruded into the lateral sealed portion, not only the appearance is damaged but also bubbling is generated to cause poor sealing, and there is a fear of leaking the packing material.

In this method, however, there is a problem that the productivity is extremely lowered as compared to the case that the packing material is continuously filled.

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