Inner bag and outer bag bonding mechanism of double-layer bag and bonding method thereof

Abstract

The invention discloses a double-layer bag inner bag and outer bag bonding mechanism and a bonding method thereof. The mechanism is provided with a base, the base is provided with a first sucker, a joint device, a second sucker and a positioning device with a third sucker, and the joint method is as follows: the inner bag is located in the outer bag and protrudes out of an opening of the outer bagto form a protruding part; the upper and lower suckers of the first sucker respectively suck the side surface of the outer bag and move in opposite directions, and the upper and lower suckers of thesecond sucker respectively suck the side surface of the protruding part and move in opposite directions; the third sucker enters the inner bag to suck the inner bag, the second sucker cancels adsorption, and the third sucker moves inwards until the opening of the inner bag is aligned with the opening of the outer bag; the outer bag and the inner bag are jointed with each other by the joint device;therefore, the inner bag and the outer bag can be automatically jointed, the joint surface is more accurate, and the situation of pollution caused by touch can be reduced.

Description

Technical field [0001] The invention relates to a packaging bag processing equipment, in particular to a processing mechanism for bonding an inner bag with a double-layer belt and an outer bag in an automated manner. Background technique [0002] In the prior art, food-grade packaging bags generally have an inner and outer double-layer bag structure, with an outer bag body and an inner bag body. The outer bag body is sleeved on the outer edge surface of the inner bag body, and the outer bag body is a woven bag or paper. Plastic bags, while the inner bag body is made of PE film, and the outer bag body is made of woven bags or paper-plastic bags because of its strong structure, which can bear the weight of goods and the deformation of the bag body after the bag is filled with goods. The inner membrane is made of PE material to maintain the freshness of food-grade goods, or to block external moisture to prevent the goods in the bag from getting damp. [0003] In the manufacture of do...

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Problems solved by technology

[0004] However, in the prior art, the opening end of the inner bag body and the outer bag body is combined, and the part of the inner bag body that protrudes from the opening of the outer bag body is pushed toward the inner direction of the outer bag body until the inner bag body is closed by manual operation. The opening edge is aligned with the opening edge of the outer bag body, and then the openings are combined with each other by using the bonding machine; but because the operator directly touches the inner bag body during the operation, it may cause contamination of the inner bag body and violate relevant health regulations In addition, the combination of the opening of the inner bag body and the opening of the outer bag body is also achieved through manual adjustment, which increases the time required for the overall operation process and is not conducive to the mass production of double-layer packaging bags. In addition, the error caused by manual alignment of the opening of the inner bag and the outer bag is also more obvious

[0005] As a large number of repeated actions of automated machinery, the wear and tear of the vulnerable parts such as the bonded joint is very serious due to the long-term use of the bonded joint due to the rigid contact with the bonding surface. How to improve the service life of the bonded joint is very important for the increase in the service time of the device. And, now Some internal and external bag bonding devices have no means of controlling the bags to be bonded during the bonding process, which can easily lead to poor bonding effects due to uncontrolled bags, and even an increase in the rate of defective products

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