A bag making machine for plastic bag production

Abstract

The utility model discloses a kind of bag making machines for plastic bag production, more specifically in the technical field of plastic bag making machine, including support frame, the support frame left end and right end are equipped with conveying mechanism, the support frame top is equipped with heat sealing mechanism, the support frame top is provided with two anti-offset components, the support frame bottom is provided with support component, two the anti-offset components are set left and right with support frame center as symmetry point.This kind of bag making machine for plastic bag production of the utility model, by setting anti-offset component, specifically is clockwise rotating rotating block and drives two moving plate to approach each other, so that the interval of two moving plate can be matched with the width of plastic bag, open motor drive belt rotation in the process of plastic bag conveying can limit plastic bag to avoid its deviation, not only will not appear leak seal condition, improve the practicability of device, and product pass rate is high, reduce the number of rejected product, reduce the waste of material.

Description

Technical Field

[0001] This utility model relates to the field of plastic bag making machine technology, and in particular to a bag making machine for producing plastic bags. Background Technology

[0002] In the packaging industry, plastic bags are widely used in the packaging of food, daily necessities, industrial products and many other fields due to their low cost, light weight and good sealing performance. As the core equipment for plastic bag production, the performance of bag making machine directly affects the production efficiency, product quality and production cost of plastic bags.

[0003] There are many types of plastic bag making machines on the market. According to different bag making processes, they can be divided into heat-sealing and cold-cutting bag making machines, heat-sealing and heat-cutting bag making machines, ultrasonic bag making machines, etc. These bag making machines meet the production needs of different types of plastic bags to a certain extent.

[0004] In existing equipment, plastic bags are prone to shifting during transport when sealing them. This can result in some edges of the plastic bag not being sealed properly, leading to a failure in the airtightness of the bag and reducing the practicality of the equipment. Furthermore, severely shifted plastic bags are rejected as unqualified, increasing material waste. Therefore, we propose a bag-making machine for plastic bag production to solve the above problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a bag-making machine for producing plastic bags, which can effectively solve the above problems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A bag-making machine for producing plastic bags includes a support frame, with conveying mechanisms installed at both the left and right ends of the support frame, a heat-sealing mechanism installed at the top of the support frame, two anti-deviation components provided at the top of the support frame, and a support component provided at the bottom of the support frame.

[0008] Preferably, the two anti-deviation components are arranged symmetrically about the center of the support frame. Each anti-deviation component includes a bidirectional threaded rod, the front and back outer surfaces of which are rotatably connected to the inner wall of the support frame. A rotating block is fixedly connected to the front of the bidirectional threaded rod.

[0009] Preferably, the bidirectional threaded rod is provided with a plurality of rotating rollers on both the left and right sides, and the front and back outer surfaces of the plurality of rotating rollers are rotatably connected to the inner wall of the support frame.

[0010] Preferably, the outer surface of the bidirectional threaded rod is threaded with two movable plates, and the bottom of both movable plates is slidably connected to the top of the rotating roller on the same side.

[0011] Preferably, the two movable plates are arranged symmetrically about the center of the bidirectional threaded rod. Three rotating shafts are rotatably connected to the inner wall of the movable plates, and a transmission belt is connected to the outer surface of the three rotating shafts. A motor is fixedly connected to the end of the movable plate away from the center of the bidirectional threaded rod, and the output end of the motor is fixedly connected to the end of the rotating shaft at the top away from the center of the bidirectional threaded rod.

[0012] Preferably, the support assembly includes four support legs, the tops of the four support legs are fixedly connected to the bottom of the support frame, and the outer surfaces of the four support legs are jointly fixedly connected to a fixing frame.

[0013] Preferably, each of the four support legs has a rotating groove on its bottom outer surface, and a rotating cylinder is rotatably connected to the inner wall of each of the four rotating grooves.

[0014] Preferably, each of the four rotating drums has a threaded rod threaded to its bottom inner wall, the top outer surface of each of the four threaded rods is slidably connected to the bottom inner wall of the support leg, and a support block is fixedly connected to the bottom of each of the four threaded rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model, by setting an anti-deviation component, specifically, rotates the rotating block clockwise to drive two moving plates closer together so that the distance between the two moving plates matches the width of the plastic bag. During the plastic bag conveying process, turning on the motor drive belt can restrict the plastic bag and prevent it from deviating. This not only prevents leakage and improves the practicality of the device, but also results in a high product qualification rate, reduces the number of rejected products, and reduces material waste.

[0017] 2. This utility model sets up a support component, specifically by rotating the drum clockwise to drive the threaded rod downward. When the threaded rod moves downward, it pushes the support block downward. By controlling the position of the four support blocks, the support frame can be kept in a horizontal state. This not only avoids structural stress concentration caused by tilting, reducing the probability of mechanical failure and extending the overall service life of the equipment, but also, in a horizontal state, the plastic bag is less likely to be subjected to lateral force due to the tilt of the equipment during the transmission process, thereby reducing the risk of displacement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the support frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the movable plate of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the fixing frame of this utility model;

[0022] Figure 5 This is a front sectional view of the support leg of this utility model.

[0023] In the diagram: 1. Support frame; 11. Conveying mechanism; 12. Heat sealing mechanism; 2. Anti-deviation component; 21. Bidirectional threaded rod; 211. Rotating block; 22. Rotating roller; 23. Moving plate; 231. Rotating shaft; 232. Transmission belt; 233. Motor; 3. Support component; 31. Support leg; 311. Fixed frame; 32. Rotating drum; 33. Threaded rod; 331. Support block. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] Example 1, as Figure 1-5 As shown, a bag-making machine for producing plastic bags includes a support frame 1. A conveying mechanism 11 is installed at both the left and right ends of the support frame 1. A heat-sealing mechanism 12 is installed at the top of the support frame 1. Two anti-deviation components 2 are provided at the top of the support frame 1. A support component 3 is provided at the bottom of the support frame 1.

[0026] The aforementioned conveying mechanism 11 consists of a driving roller and a driven roller. The driving roller is driven to rotate by a motor and clamps the film through the frictional force between it and the driven roller, thereby achieving continuous and uniform conveying.

[0027] The aforementioned heat sealing mechanism 12 includes a heat sealing mold, an electric heating tube, a hydraulic cylinder, and a pad. When the device is in use, after the film is aligned, the electric heating tube heats the heat sealing mold to a set temperature, and the hydraulic cylinder drives the mold to move towards the pad to clamp the film. After a set time of heat sealing and fusion, the hydraulic cylinder drives the mold to reset, and the film is transferred to the next process, and the cycle continues.

[0028] Specifically, in order to prevent plastic bags from shifting during transport, see [link to relevant documentation]. Figure 2 and Figure 3 In this embodiment, the two anti-deviation components 2 are arranged symmetrically to the left and right with the center of the support frame 1 as the center point. The anti-deviation component 2 includes a bidirectional threaded rod 21. The front and back outer surfaces of the bidirectional threaded rod 21 are rotatably connected to the inner wall of the support frame 1. A rotating block 211 is fixedly connected to the front of the bidirectional threaded rod 21.

[0029] Further reading Figure 2In this embodiment, a plurality of rotating rollers 22 are provided on both the left and right sides of the bidirectional threaded rod 21, and the front and back outer surfaces of the plurality of rotating rollers 22 are rotatably connected to the inner wall of the support frame 1.

[0030] Further reading Figure 3 In this embodiment, the outer surface of the bidirectional threaded rod 21 is threaded with two movable plates 23, and the bottom of the two movable plates 23 is slidably connected to the top of the rotating roller 22 on the same side.

[0031] Further reading Figure 3 In this embodiment, the two movable plates 23 are arranged symmetrically with the center of the bidirectional threaded rod 21 as the center point. The inner wall of the movable plate 23 is rotatably connected to three rotating shafts 231. The outer surfaces of the three rotating shafts 231 are connected to a transmission belt 232. A motor 233 is fixedly connected to one end of the movable plate 23 away from the center of the bidirectional threaded rod 21. The output end of the motor 233 is fixedly connected to the end of the rotating shaft 231 at the top away from the center of the bidirectional threaded rod 21.

[0032] The two motors 233 mentioned above are of the same model and batch, which can ensure that their internal structure and performance parameters (such as rated speed, torque, efficiency, etc.) are consistent.

[0033] Simultaneously, the control parameters (such as PID parameters) of motor 233 are precisely matched and optimized. Based on the characteristics of motor 233, load conditions, and dynamic response requirements of the system, the proportional (P), integral (I), and derivative (D) parameters are adjusted to enable the motor to respond quickly and stably to control commands under different operating conditions, reducing speed fluctuations.

[0034] During implementation, when sealing the plastic bag during production is required, the distance between the two moving plates 23 is first adjusted according to the width of the plastic bag. Rotating the rotating block 211 clockwise causes the bidirectional threaded rod 21 to rotate within the support frame 1. Simultaneously, the clockwise rotation of the bidirectional threaded rod 21 causes the two moving plates 23 to move closer together, ensuring the distance between them matches the width of the plastic bag. One end of the plastic bag is then sequentially installed onto the two conveying mechanisms 11. During installation, the plastic bag passes through the gap between the transmission belt 232 and the rotating roller 22. The top of the plastic bag contacts the bottom of the transmission belt 232, while the bottom contacts the top of the rotating roller 22. During the conveying of the plastic bag, the motor 233 is turned on to drive the rotating shaft 231 to rotate. When the rotating shaft 231 rotates, it drives the transmission belt 232 to rotate. The rotation of the transmission belt 232 drives the plastic bag to move, which can restrict the plastic bag and prevent it from deviating. This not only allows the heat sealing mechanism 12 to accurately cover the preset position of the edge of the plastic bag and prevents the leakage of sealing, thus improving the practicality of the device, but also results in a high product qualification rate, reduces the number of rejected products, and reduces material waste.

[0035] The surface of the movable plate 23 that contacts the plastic bag is covered with a layer of soft material with a certain degree of friction, such as a silicone pad or a polyurethane rubber pad. This type of material can both conform to the flexible surface of the plastic bag, reducing wrinkles caused by rigid impact, and provide sufficient friction to effectively transmit guiding force.

[0036] Meanwhile, both sides of the mobile version 23 are equipped with side pressure roller assemblies. The side pressure rollers are made of rubber with a certain degree of surface roughness to increase the friction with the plastic bag. By adjusting the pressure of the side pressure rollers, they gently press down on both sides of the plastic bag, playing an auxiliary guiding and stabilizing role in the conveying process. The pressure of the side pressure rollers on the plastic bag is controlled at 0.1-0.3MPa, which ensures the guiding effect without excessively squeezing the plastic bag.

[0037] Example 2: This example is based on Example 1, in which a support component is added.

[0038] Specifically, in order to achieve the goal of keeping the device level on uneven ground, see [reference needed]. Figure 4 and Figure 5 In this embodiment, the support component 3 includes four support legs 31. The tops of the four support legs 31 are fixedly connected to the bottom of the support frame 1, and the outer surfaces of the four support legs 31 are fixedly connected to a fixing frame 311.

[0039] Further reading Figure 5 In this embodiment, the bottom outer surface of each of the four support legs 31 is provided with a rotating groove, and the inner wall of each of the four rotating grooves is rotatably connected to a rotating cylinder 32.

[0040] Further reading Figure 5 In this embodiment, the bottom inner walls of the four rotating drums 32 are all threaded with threaded rods 33, the top outer surfaces of the four threaded rods 33 are slidably connected to the bottom inner walls of the support legs 31, and the bottoms of the four threaded rods 33 are fixedly connected with support blocks 331.

[0041] During implementation, when the ground on which the device is placed is not level, rotating the drum 32 clockwise will cause the threaded rod 33 to move downwards as the inner wall of the drum 32 is threaded to the outer surface of the threaded rod 33. As the threaded rod 33 moves downwards, it will push the support block 331 downwards. Controlling the number of rotations of the drum 32 will ensure that the bottom of the support block 331 is in close contact with the ground. By controlling the position of the four support blocks 331, the device can ensure that the support frame 1 is in a horizontal state on uneven ground. This not only avoids structural stress concentration caused by tilting, reducing the probability of mechanical failure and extending the overall service life of the equipment, but also reduces the risk of displacement by preventing the plastic bag from being subjected to lateral forces due to the tilt of the equipment during transportation when it is in a horizontal state.

[0042] The working principle of this utility model is as follows: When it is necessary to seal the plastic bag during the production process, firstly, the distance between the two moving plates 23 is adjusted according to the width of the plastic bag. Rotating the rotating block 211 clockwise drives the bidirectional threaded rod 21 to rotate within the inner wall of the support frame 1. Simultaneously, the clockwise rotation of the bidirectional threaded rod 21 causes the two moving plates 23 to move closer together, ensuring that the distance between the two moving plates 23 matches the width of the plastic bag. One end of the plastic bag is then sequentially installed on the two conveying mechanisms 11. During installation, the plastic bag passes between the transmission belt 232 and the rotating roller 22. The gap allows the top of the plastic bag to contact the bottom of the transmission belt 232, while the bottom contacts the top of the rotating roller 22. During the conveying of the plastic bag, the motor 233 is turned on to drive the rotating shaft 231 to rotate. When the rotating shaft 231 rotates, it drives the transmission belt 232 to rotate. The rotation of the transmission belt 232 causes the plastic bag to move, which can restrict the plastic bag and prevent it from deviating. This not only allows the heat sealing mechanism 12 to accurately cover the preset position of the edge of the plastic bag and prevents leakage, thus improving the practicality of the device, but also results in a high product qualification rate, reduces the number of rejected products, and reduces material waste.

[0043] When the ground on which the device is placed is not level, rotating the drum 32 clockwise will cause the threaded rod 33 to move downwards as the inner wall of the drum 32 is threaded to the outer surface of the threaded rod 33. As the threaded rod 33 moves downwards, it will push the support block 331 downwards. Controlling the number of rotations of the drum 32 will ensure that the bottom of the support block 331 is in close contact with the ground. By controlling the position of the four support blocks 331, the device can ensure that the support frame 1 is in a horizontal state on uneven ground. This not only avoids structural stress concentration caused by tilting, reducing the probability of mechanical failure and extending the overall service life of the equipment, but also reduces the risk of displacement of the plastic bag during transportation due to the tilt of the equipment.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bag-making machine for producing plastic bags, comprising a support frame (1), wherein a conveying mechanism (11) is installed at both the left and right ends of the support frame (1), and a heat-sealing mechanism (12) is installed at the top of the support frame (1), characterized in that: The support frame (1) has two anti-offset components (2) at the top and a support component (3) at the bottom. The two anti-deviation components (2) are arranged symmetrically to the left and right of the center of the support frame (1). The anti-deviation component (2) includes a bidirectional threaded rod (21). The outer surfaces of the front and back of the bidirectional threaded rod (21) are rotatably connected to the inner wall of the support frame (1). A rotating block (211) is fixedly connected to the front of the bidirectional threaded rod (21).

2. The bag-making machine for producing plastic bags according to claim 1, characterized in that: The bidirectional threaded rod (21) is provided with several rotating rollers (22) on both the left and right sides. The front and back outer surfaces of the several rotating rollers (22) are rotatably connected to the inner wall of the support frame (1).

3. The bag-making machine for producing plastic bags according to claim 2, characterized in that: The outer surface of the bidirectional threaded rod (21) is threaded with two movable plates (23), and the bottom of the two movable plates (23) is slidably connected to the top of the rotating roller (22) on the same side.

4. A bag-making machine for producing plastic bags according to claim 3, characterized in that: The two movable plates (23) are arranged symmetrically with the center of the bidirectional threaded rod (21) as the center. The inner wall of the movable plate (23) is rotatably connected to three rotating shafts (231). The outer surfaces of the three rotating shafts (231) are connected to a transmission belt (232). A motor (233) is fixedly connected to one end of the movable plate (23) away from the center of the bidirectional threaded rod (21). The output end of the motor (233) is fixedly connected to one end of the rotating shaft (231) at the top away from the center of the bidirectional threaded rod (21).

5. A bag-making machine for producing plastic bags according to claim 1, characterized in that: The support assembly (3) includes four support legs (31), the tops of the four support legs (31) are fixedly connected to the bottom of the support frame (1), and the outer surfaces of the four support legs (31) are fixedly connected to a fixing frame (311).

6. A bag-making machine for producing plastic bags according to claim 5, characterized in that: The bottom outer surface of each of the four support legs (31) is provided with a rotating groove, and the inner wall of each of the four rotating grooves is rotatably connected to a rotating cylinder (32).

7. A bag-making machine for producing plastic bags according to claim 6, characterized in that: The bottom inner walls of the four rotating drums (32) are all threaded with threaded rods (33), the top outer surfaces of the four threaded rods (33) are slidably connected to the bottom inner walls of the support legs (31), and the bottoms of the four threaded rods (33) are fixedly connected with support blocks (331).

Images