Packaging bag feeding and expanding system and method

Abstract

The invention relates to the field of packaging equipment, in particular to a packaging bag feeding and expanding system and method. The system comprises a rack and further comprises a bag feeding device and a bag expanding device which are fixed to the rack. The input end of the bag feeding device is connected with a packaging bag feeding port, and the output end of the bag feeding device is connected with the input end of the bag expanding device. The output end of the bag expanding device is connected with the output end of a material falling device. The bag feeding device is used for feeding and conveying packaging bags. The bag expanding device is used for expanding bag openings of the packaging bags. According to the system, by arranging the bag feeding device, edge wrinkles are avoided when the packaging bags are conveyed, and the bag feeding quality of the packaging bags is guaranteed; and by arranging the bag expanding device, accurate clamping of the packaging bags is guaranteed, and the complexity of equipment is reduced.

Description

technical field [0001] The invention relates to the field of packaging equipment, in particular to a system and method for stretching a bag on a packaging bag. Background technique [0002] Pellet packaging equipment is a kind of machine that packs pellets, which plays a role in protecting pellets and facilitating transportation. It is mainly suitable for automatic quantitative packaging of granular materials in rice, food, sugar, chemical and other industries. The pellet packaging equipment mainly includes the process of feeding the packaging bag, opening the packaging bag, filling the pellet material, conveying the packaging bag and sealing the packaging bag. The quality of the packaging process is directly related to the sealing quality of the packaging bag, the accuracy of the filling weight of the pellets and the compactness of the pellets in the packaging bag. Therefore, for pellet packaging, the quality of the packaging equipment used is particularly important. [...

AI Technical Summary

Problems solved by technology

[0004] The prior art has the following deficiencies: 1. When feeding the packaging bag, first use the suction bag mechanism to contact the upper surface of the middle part of the packaging bag to absorb it, and then the driving mechanism drives the suction bag mechanism to move to the delivery bag mechanism to transport the packaging bag to The next station; while the texture of the packaging bag is soft, the edge of the soft packaging bag will bend and sag under the action of gravity after the suction bag mechanism absorbs the middle part of the packaging bag; when the suction bag mechanism loosens the suction bag When the bag is opened and dropped to the conveying bag mechanism, the bent and drooping bag edge will be pressed against the bottom of the bag as the bag falls; resulting in edge wrinkles when the bag is output to the next station, affecting the quality of the bag on the bag

2. When the packaging bag is stretched and conveyed, the bag opening mechanism first stretches the packaging bag, and then flips the air claw hand in the gripping mechanism to grip the stretched packaging bag; at the same time flips the bag holding cylinder in the gripping mechanism Drive the two expansion plates to continue to expand the upper and lower sides of the inner side of the packaging bag, and finally the flipping and gripping mechanism drives the opened packaging bag to rotate to the filling station to complete the packaging bag stretching and conveying process; while the air in the flipping and gripping mechanism When the gripper grips the packaging bag, the cylinder directly drives the gripper to grip the packaging bag; but the manufacturing precision of the cylinder is low and the cylinder shaft and the cylinder wall are easy to wear, and the cylinder shaft and the cylinder wall will be worn due to frequent gripping of the packaging bag. A larger gap is generated; thereby causing the cylinder shaft to shake relative to the cylinder wall when driving the jaws to move, causing the jaws to be unable to accurately grip the packaging bag; at the same time, when the packaging bag is stretched in the flipping and gripping mechanism, it is The two bag-supporting cylinders respectively drive their respective bag-supporting plates to rotate up and down to open the packaging bag; and this method of opening requires two bag-supporting cylinders to work separately, resulting in a large number of bag-supporting cylinders and increasing the complexity of the equipment

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