Bag bottom air supply device of bag making machine

Abstract

The utility model discloses a bag bottom air supply device of a bag making machine, which is provided with an air pipe, an air inlet of the air pipe is connected with an air supply component, a heating component is arranged in the air pipe, and the bag bottom air supply device is characterized in that an air outlet of the air pipe is communicated with an inner cavity of an air distribution seat, and the air distribution seat is provided with a first air outlet and a second air outlet which are communicated with the inner cavity of the air distribution seat. The first air outlet is aligned to the bag bottom, the second air outlet is communicated with an exhaust pipe, an air distribution part is movably arranged in the air distribution seat, and an air channel capable of being communicated with the first air outlet and the second air outlet is formed in the air distribution part, so that the air mass flow of the first air outlet is changed from 0 to the maximum mass flow m1, and then is changed from the maximum mass flow m1 to the weakening mass flow m2; then the weakened mass flow m2 is enhanced to the maximum mass flow m1, then the maximum mass flow m1 is weakened to 0, and the process is periodic circulation. The air supply device is simple in structure and reasonable in design, air supply pressure of different positions of the bag bottom can be conveniently adjusted, and the forming quality of the bag bottom is guaranteed.

Description

Technical Field

[0001] The utility model relates to bag making equipment, in particular to a bag bottom air supply device of a bag making machine. Background Art

[0002] The bag making machine is a special production equipment used for automatic forming of packaging bags. For one type of bag bottom, during the forming process of the bag bottom, a strip-shaped cover sheet needs to be hot-melted at the bag bottom to ensure that the bag bottom can withstand a larger load after forming. The traditional hot-melting method is to provide hot air to the cover sheet so that the cover sheet is heated and melted to the bag bottom. However, different parts of the bag bottom after folding and forming are not equally flat, and different positions are at different distances from the blowing nozzle. This leads to incomplete welding at the position farthest from the nozzle. Chinese patent document (publication number: CN113226724A; publication date: August 6, 2021) discloses a device and method for applying a cover sheet to the end of a preformed cross bottom of a bag section. Referring to claim 5 and the specification, it can be seen that at least two compressors are used to provide gas, one of which is a constantly running compressor that provides a basic mass flow, and the other auxiliary compressor provides a pulsating mass flow. When a larger air pressure portion is required for the cover sheet to be bonded, the auxiliary compressor is started so that the pulsating mass flow is added to the basic mass flow, thereby ensuring that different parts of the cover sheet can be completely bonded to the bag bottom. The drawbacks of this structure are that a large number of compressors are required, and the connecting pipelines of the entire equipment are more complicated. In addition, the corresponding compressors need to be controlled by corresponding control units, and the control and adjustment operations are also relatively cumbersome. Utility Model Content

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the utility model is to provide a bag bottom air supply device for a bag making machine for solving the above-mentioned problem.

[0004] To this end, the utility model is implemented by adopting the following scheme:

[0005] The bag bottom air supply device of the bag making machine has an air pipe, the air inlet of the air pipe is connected to the air supply component, and a heating component is arranged in the air pipe. It is characterized in that the air outlet of the air pipe is connected to the inner cavity of the air distribution seat, and the air distribution seat is provided with a first air outlet and a second air outlet connected to its inner cavity, the first air outlet is aligned with the bottom of the bag, and the second air outlet is connected to the exhaust pipe. A gas distribution component is movably arranged in the air distribution seat, and the gas distribution component is provided with an airway that can be connected with the first and second air outlets, so that the gas mass flow of the first air outlet changes from 0 to the maximum mass flow m1, and then changes from the maximum mass flow m1 to the weakened mass flow m2, and then increases from the weakened mass flow m2 to the maximum mass flow m1, and then weakens from the maximum mass flow m1 to 0, and the above process is a periodic cycle.

[0006] The air distribution part is a rotating shaft, which is connected to the rotating adjustment component. One end of the airway on the rotating shaft can be connected to the air outlet of the trachea, and the other end can be connected to the first and second air outlets.

[0007] The rotation adjustment assembly includes a drive motor, the output end of the drive motor is connected to a first rotating block, the first rotating block is eccentrically hinged to one end of a transmission arm, the other end of the transmission arm is eccentrically hinged to a second rotating block, and the second rotating block is connected to a rotating shaft.

[0008] The first air outlet is provided with an air guide nozzle aimed at the bottom of the bag.

[0009] The bag bottom air supply device of the bag making machine of the above technical solution, by cooperating with the air distribution seat and the air distribution parts, can adjust the gas flow rate entering the first and second air outlets by controlling the action of the accessories, and then adjust the gas flow rate blown to the bottom of the bag. Only one set of air supply components is required to complete the air supply to all parts of the bottom of the bag, which makes the pipeline structure of the equipment simpler, the production and processing are simpler, the cost is lower, and the air distribution parts adjustment method is more flexible in adjusting the air pressure, more convenient to operate, and has a wider range of use, which can provide users with a better use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a structural diagram of the valve seat of the utility model;

[0013] Figure 3 It is a structural diagram of the rotating shaft of the utility model. DETAILED DESCRIPTION

[0014] As shown in the figure, the bag bottom air supply device of the bag making machine disclosed by the utility model comprises an air pipe 2, the air inlet of the air pipe 2 is connected to the air supply component, a heating component is arranged in the air pipe 2, the air outlet of the air pipe 2 is communicated with the inner cavity 10 of the air distribution seat 8, the air distribution seat 8 is provided with a first air outlet 12 and a second air outlet 11 which are communicated with the inner cavity thereof, the first air outlet 12 is aligned with the bottom position of the bag, the second air outlet 11 is communicated with the exhaust pipe 1, an air distribution component is movably arranged in the air distribution seat 8, and an air duct 13 which can be communicated with the first and second air outlets is arranged on the air distribution component. In this embodiment, the gas distribution part is a rotating shaft 7, which is connected to the rotating adjustment component. One end of the airway 13 on the rotating shaft 7 can be connected to the outlet of the trachea 2, and the other end can be connected to the first and second outlets, so that the gas mass flow of the first outlet 12 changes from 0 to the maximum mass flow m1, and then from the maximum mass flow m1 to the weakened mass flow m2, and then from the weakened mass flow m2 to the maximum mass flow m1, and then from the maximum mass flow m1 to 0. The above process is a periodic cycle. The rotation adjustment component includes a driving motor 3, the output end of the driving motor 3 is connected to the first rotating block 4, the first rotating block 4 is eccentrically hinged to one end of the transmission arm 5, the other end of the transmission arm 5 is eccentrically hinged to the second rotating block 6, and the second rotating block 6 is connected to the rotating shaft 7. By controlling the driving motor 3 to drive the first rotating block 4 to rotate, and through the transmission of the transmission arm 5 and the second rotating block 6, the rotating shaft 7 can be driven to rotate, and by controlling the rotation angle of the rotating shaft 7, the cross-sectional amount of the air channel 13 on the rotating shaft 7 and the first air outlet 12 is adjusted, and the air pressure blown out of the first air outlet 12 is adjusted, so that different parts of the bag bottom can obtain appropriate air pressure when sent to the first air outlet 12, ensuring that the cover sheet can be more firmly bonded to the bag bottom position, and the remaining unnecessary hot air is discharged through the second air outlet 12 and the air pipe 1. The first air outlet 12 is provided with an air guide nozzle 9 aimed at the bag bottom to guide the hot air and ensure that the gas can be accurately sent to the bag bottom cover sheet. Of course, in addition to using a rotating shaft structure, the gas distribution component can also use a moving block, on which an air duct connected to the air pipe is provided, and the first and second air outlets on the gas distribution seat are connected to the first and second air inlets in the gas distribution seat. By controlling the movement of the moving block and adjusting the cross-sectional size of the air duct on the moving block to be aligned with the first and second air inlets, the air pressure at the first air outlet can also be adjusted.

[0015] The structure of the utility model, through the coordinated arrangement of the gas distribution seat and the gas distribution parts, can control the action of the accessories to adjust the gas flow entering the first and second air outlets, and further adjust the gas flow blown to the bottom of the bag. Only one set of air supply components is needed to complete the air supply to all parts of the bottom of the bag, which makes the pipeline structure of the equipment simpler, the production and processing are simpler, the cost is lower, and the adjustment method of the gas distribution parts is more flexible in adjusting the air pressure, more convenient to operate, and has a wider range of use, which can provide users with a better use experience.

Claims

1. A bag bottom air supply device of a bag making machine, comprising an air pipe (2), an air inlet of the air pipe (2) being connected to an air supply component, a heating component being arranged in the air pipe (2), characterized in that The air outlet of the air pipe (2) is connected to the inner cavity (10) of the air distribution seat (8), and the air distribution seat (8) is provided with a first air outlet (12) and a second air outlet (11) connected to the inner cavity thereof, wherein the first air outlet (12) is aligned with the bottom of the bag, and the second air outlet (11) is connected to the exhaust pipe (1). A air distribution component is movably arranged in the air distribution seat (8), and an air channel (13) which can be connected to the first and second air outlets is arranged on the air distribution component, so that the gas mass flow of the first air outlet (12) changes from 0 to a maximum mass flow m1, then changes from the maximum mass flow m1 to a reduced mass flow m2, then increases from the reduced mass flow m2 to a maximum mass flow m1, and then decreases from the maximum mass flow m1 to 0, and the above process is a periodic cycle.

2. The bag bottom air supply device of the bag making machine according to claim 1, characterized in that The gas distribution component is a rotating shaft (7), the rotating shaft (7) is connected to the rotating adjustment component, one end of the air channel (13) on the rotating shaft (7) can be connected to the air outlet of the air pipe (2), and the other end can be connected to the first and second air outlets.

3. The bag bottom air supply device of the bag making machine according to claim 2, characterized in that The rotation adjustment assembly comprises a drive motor (3), the output end of the drive motor (3) is connected to a first rotating block (4), the first rotating block (4) is eccentrically hinged to one end of a transmission arm (5), the other end of the transmission arm (5) is eccentrically hinged to a second rotating block (6), and the second rotating block (6) is connected to a rotating shaft (7).

4. The bag bottom air supply device of the bag making machine according to claim 1, characterized in that An air guide nozzle (9) aligned with the bottom of the bag is provided at the first air outlet (12).

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