Cutting device for plastic packaging bag making

Abstract

The utility model discloses a cutting device for plastic packaging bag making, and relates to the technical field of plastic packaging bag cutting. Comprising a gear, a plurality of hot-press sealing machines are fixedly arranged on the gear, a cutting plate is arranged on each hot-press sealing machine in a sliding mode, a mounting shaft is fixed to each hot-press sealing machine, a swing rod is fixedly arranged on each mounting shaft, a pressing wheel is fixedly and rotatably arranged on each swing rod, and a torsional spring is fixedly arranged on each swing rod; and the torsional spring is fixedly connected with the hot-press sealing machine. The hot-press sealing machine and the cutting plate are arranged on the conveying belt, so that the plastic packaging bags can be cut off and sealed at the same time in the conveying process, the movement of the conveying belt does not need to be interrupted, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] This application relates to the field of plastic packaging bag cutting technology, specifically to a cutting device for making plastic packaging bags. Background Technology

[0002] With the rapid development of modern industrial technology, plastic packaging bags, as an economical, lightweight, and practical packaging method, have been widely used in various industrial, agricultural, commercial, and household fields. Especially in the production and processing of packaging bags, improving automation levels, production efficiency, and product quality has become an important direction for the research and development of related equipment technologies.

[0003] Existing bag-making equipment requires significant pauses between cutting and heat-sealing steps or relies on multiple machines working together, resulting in low production efficiency. Furthermore, due to poor equipment synchronization, plastic bags are prone to floating, shifting, or knotting during transport, affecting the accuracy of cutting and sealing. Summary of the Invention

[0004] To address the aforementioned technical problems, this application solves the problem in the prior art that the conveying process needs to be interrupted when cutting plastic packaging bags, and that the poor synchronization between different processes leads to the displacement of plastic packaging bags.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a cutting device for making plastic packaging bags, including a conveyor belt, a plurality of hot press sealing machines fixedly mounted on the conveyor belt, a cutting plate slidably mounted on the hot press sealing machine, an installation shaft fixedly mounted on the hot press sealing machine, a swing rod fixedly mounted on the installation shaft, a pressing wheel fixedly and rotatably mounted on the swing rod, and a torsion spring fixedly mounted on the swing rod, the torsion spring being fixedly connected to the hot press sealing machine.

[0006] The conveyor belt is equipped with support wheels, a main shaft is fixedly mounted on the support wheels, a gear is fixedly mounted on the main shaft, and multiple grooves are provided on the conveyor belt, which mesh with the teeth of the gears.

[0007] To better realize this application, a support frame is rotatably mounted on the main shaft, a conveyor table is fixedly mounted on the support frame, and a commutator is fixedly mounted on the conveyor table.

[0008] To better realize this application, a slide rod is fixedly provided on the cutting plate, and an mounting plate is fixedly provided on the conveyor belt. The slide rod is slidably connected to the mounting plate, and a spring is fixedly provided on the mounting plate. The spring is fixedly connected to the cutting plate.

[0009] To better realize this application, the hot-press sealing machine is further located between the pressing roller and the cutting plate.

[0010] To better realize this application, further, when the cutting plate is located on the side of the conveyor belt near the conveyor table, the spring on the cutting plate is in a compressed state.

[0011] The technical solution provided in this application has the following advantages compared with the prior art:

[0012] 1. This application enables plastic packaging bags to be cut and sealed simultaneously during the conveying process by configuring a heat sealing machine and a cutting plate on the conveyor belt, without interrupting the movement of the conveyor belt, thereby significantly improving production efficiency.

[0013] 2. The cutting plate of this application is designed with a sliding structure. Through the cooperation of springs and sliding rods, it achieves gradual pressure application and cutting of the plastic packaging bag, ensuring a stable cutting process and neat edges. Simultaneously, the heat-sealing machine incorporates a pressing roller and torsion spring design to ensure uniform sealing pressure, further improving the sealing quality of the plastic packaging bag.

[0014] 3. This application effectively avoids the floating and shifting of the packaging bag caused by airflow or static electricity during high-speed conveying by pressing the packaging bag with the tip of the cutting plate and the continuous pressing action of the pressing roller, thus ensuring the accuracy of cutting and sealing.

[0015] 4. The pressing roller in this application uses a torsion spring as an elastic adjustment element, which can gradually reduce the pressing force after sealing, thereby avoiding the generation of static electricity when the pressing roller is removed from the packaging bag. Attached Figure Description

[0016] Figure 1 This is the isometric drawing of this application;

[0017] Figure 2 This is a schematic diagram of the conveyor belt structure of this application;

[0018] Figure 3 for Figure 2 Enlarged view of the local structure at point A;

[0019] Figure 4 for Figure 2 Enlarged view of the local structure at point B;

[0020] In the diagram: 101-Conveyor table; 102-Reversing device; 103-Support frame; 104-Main shaft; 105-Support wheel; 106-Gear; 107-Conveyor belt; 108-Hot press sealing machine; 109-Cutting plate; 110-Mounting shaft; 111-Swing rod; 112-Torsion spring; 113-Pressing wheel; 114-Mounting plate; 115-Slide rod; 116-Spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] like Figures 1 to 4 As shown, a cutting device for making plastic packaging bags includes a conveyor belt 107, a support wheel 105 mounted on the conveyor belt 107, a main shaft 104 fixedly mounted on the support wheel 105, and a gear 106 fixedly mounted on the main shaft 104. The conveyor belt 107 has multiple grooves that engage with the teeth of the gear 106. When the gear 106 rotates, the teeth of the gear 106 insert into the grooves of the conveyor belt 107, thereby driving the conveyor belt 107 to move.

[0024] Multiple hot press sealing machines 108 are fixedly installed on the conveyor belt 107. A cutting plate 109 is slidably installed on the hot press sealing machine 108. An installation shaft 110 is fixedly installed on the hot press sealing machine 108. A swing rod 111 is fixedly installed on the installation shaft 110. A pressing wheel 113 is fixedly rotatably installed on the swing rod 111. A torsion spring 112 is fixedly installed on the swing rod 111. The torsion spring 112 is fixedly connected to the hot press sealing machine 108.

[0025] Specifically, during use, the conveyor belt 107 is driven to move, which in turn drives the heat sealing machine 108 and the cutting plate 109 to move. When the heat sealing machine 108 and the cutting plate 109 move from the upper end to the lower end of the conveyor belt 107, the cutting plate 109 will first contact the plastic packaging bag and press the plastic packaging bag with its tip to prevent the plastic packaging bag from floating or shifting due to the wind generated by the movement of the cutting plate 109 and the conveyor belt 107, thereby ensuring the stable transport of the plastic packaging bag.

[0026] The cutting plate 109 on the conveyor belt 107 moves at the same speed as the conveying speed of the plastic packaging bag, continuing to drive the conveyor belt 107 to rotate. The heat sealer 108 on the conveyor belt 107 contacts and presses the plastic packaging bag. The cutting plate 109 is in an inclined state when it contacts the plastic packaging bag. As the cutting plate 109 rotates with the conveyor belt 107, it gradually becomes vertical. During this process, the cutting plate 109 gradually slides upward on the heat sealer 108, and the resistance at the upper end of the cutting plate 109 gradually increases to press the plastic packaging bag. When the resistance is large enough, the tip of the cutting plate 109 will cut the plastic packaging bag, causing the plastic packaging bag to be cut off. When cut off, the plastic packaging bag on the left side of the cutting plate 109 will be pressed by the heat sealer 108 to maintain stability, while the plastic packaging bag on the right side will be pressed and sealed by the heat sealer 108 on its right end.

[0027] After the heat sealing machine 108 presses the plastic packaging bag, the conveyor belt 107 continues to move, causing the pressing roller 113 on the heat sealing machine 108 to contact the plastic packaging bag. Through the resistance of the conveying mechanism of the plastic packaging bag, the pressing roller 113 pushes the swing rod 111 to rotate on the mounting shaft 110. The swing rod 111 twists the torsion spring 112, thereby using the torsion of the torsion spring 112 to maintain a large pressing force between the pressing roller 113 and the plastic packaging bag, further stabilizing the conveying of the plastic packaging bag.

[0028] When the conveyor belt 107 moves the heat sealing machine 108, cutting plate 109, and pressing roller 113 to the right end, that is, when the cutting plate 109, heat sealing machine 108, and pressing roller 113 are gradually moved from the lower end to the upper end, the cutting plate 109 first moves away from the plastic packaging bag and gradually slides on the heat sealing machine 108 to reset. Then the heat sealing machine 108 detaches from the plastic packaging bag and contacts the heat sealing machine. After the heat sealing machine 108 detaches, the pressing roller 113 continues to seal the plastic packaging bag. Pressing ensures effective conveying. As the heat sealer 108 gradually moves away from the plastic packaging bag, the change in angle between the torsion spring 112 and the heat sealer 108 gradually reduces the degree of torsion of the torsion spring 112, thereby reducing the torque of the torsion spring 112. The force applied by the torsion spring 112 to the swing rod 111 is reduced, which reduces the pressing force between the pressing roller 113 and the plastic packaging bag. As a result, the pressing roller 113 will not generate static electricity due to sudden movement away from the plastic packaging bag when it leaves the bag, thus preventing the plastic packaging bag from floating or shifting.

[0029] The conveyor belt 107 drives multiple sets of heat sealing machines 108, cutting plates 109 and pressing rollers 113 to cut, heat seal and convey continuously conveyed plastic packaging bags, thereby completing the cutting and heat sealing work without interrupting the conveying of plastic packaging bags, thus improving work efficiency.

[0030] like Figure 1 As shown, a support frame 103 is rotatably mounted on the main shaft 104, a conveyor table 101 is fixedly mounted on the support frame 103, and a commutator 102 is fixedly mounted on the conveyor table 101.

[0031] Specifically, the input end of the commutator 102 is connected to the power of the conveyor table 101, and the output end of the commutator 102 is connected to the main shaft 104 via a belt. The two main shafts 104 are also connected by a belt, so that the main shaft 104 drives the conveyor belt 107 to move through the support wheel 105 and the gear 106, thereby making the conveyor belt 107 and the conveyor table 101 maintain the same speed, which facilitates the cutting and hot pressing of plastic packaging bags.

[0032] When in use, when the conveyor table 101 is started, it drives the main shaft 104 to rotate through the reversing device 102 and the belt. The main shaft 104 changes the direction of rotation. The main shaft 104 drives the conveyor belt 107 to move through the support wheel 105 and the gear 106. The conveyor belt 107 rotates counterclockwise, and the conveyor table 101 rotates clockwise. Thus, the hot press sealing machine 108, the cutting plate 109, the pressing wheel 113 and the conveyor table 101 work together to move the plastic packaging bag.

[0033] The support wheel 105 drives the conveyor belt 107 to rotate through friction and supports the conveyor belt 107. The gear 106 drives the conveyor belt 107 to rotate through the meshing of its teeth and the grooves of the conveyor belt 107. The two sets of drive methods ensure the stability of the movement and position of the conveyor belt 107, and ensure that the horizontal sections at the upper and lower ends of the conveyor belt 107 remain stable. This allows the heat sealing machine 108, the cutting plate 109, and the pressing wheel 113 to apply stable pressure and cutting to the plastic packaging bag.

[0034] like Figure 3 and Figure 4 As shown, a slide rod 115 is fixedly installed on the cutting plate 109, and an mounting plate 114 is fixedly installed on the conveyor belt 107. The slide rod 115 is slidably connected to the mounting plate 114, and a spring 116 is fixedly installed on the mounting plate 114. The spring 116 is fixedly connected to the cutting plate 109.

[0035] Specifically, when the cutting plate 109 is not in contact with the plastic packaging bag, the spring 116 on the cutting plate 109 is in an extended state, so the tip of the cutting plate 109 extends out of the heat sealing machine 108. After the cutting plate 109 contacts the plastic packaging bag, it slides on the heat sealing machine 108 due to the obstruction of the conveyor table 101. The cutting plate 109 pushes the mounting plate 114 to slide on the slide rod 115 and compresses the spring 116. The elastic force of the spring 116 increases the contact ability between the cutting plate 109 and the plastic packaging bag. The surface of the conveyor table 101 that contacts the plastic packaging bag is made of a flexible material, such as rubber, so it is not afraid of the cutting tip of the cutting plate 109. Under high pressure, the tip of the cutting plate 109 cuts the plastic packaging bag.

[0036] like Figure 3 As shown, the hot-press sealing machine 108 is located between the pressing roller 113 and the cutting plate 109.

[0037] like Figure 2 As shown, when the cutting plate 109 is located on the side of the conveyor belt 107 closer to the conveyor table 101, the spring 116 on the cutting plate 109 is in a compressed state. Specifically, when the cutting plate 109 is located on the side of the conveyor belt 107 away from the conveyor table 101, the spring 116 on the cutting plate 109 is in an extended state.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting device for making plastic packaging bags, comprising a conveyor belt (107), characterized in that: The conveyor belt (107) is provided with a support wheel (105), a main shaft (104) is fixedly provided on the support wheel (105), a gear (106) is fixedly provided on the main shaft (104), and a plurality of grooves are provided on the conveyor belt (107), which are engaged with the teeth of the gear (106). Multiple hot-press sealing machines (108) are fixedly installed on the conveyor belt (107). Each hot-press sealing machine (108) has a cutting plate (109) slidably installed on it. A mounting shaft (110) is fixedly installed on the hot-press sealing machine (108). A swing rod (111) is fixedly installed on the mounting shaft (110). A pressing wheel (113) is fixedly rotatably installed on the swing rod (111). A torsion spring (112) is fixedly installed on the swing rod (111). The torsion spring (112) is fixedly connected to the hot-press sealing machine (108).

2. The cutting device for making plastic packaging bags according to claim 1, characterized in that: A support frame (103) is rotatably mounted on the main shaft (104), a conveyor table (101) is fixedly mounted on the support frame (103), and a commutator (102) is fixedly mounted on the conveyor table (101).

3. The cutting device for making plastic packaging bags according to claim 2, characterized in that: A slide rod (115) is fixedly installed on the cutting plate (109), and an mounting plate (114) is fixedly installed on the conveyor belt (107). The slide rod (115) is slidably connected to the mounting plate (114), and a spring (116) is fixedly installed on the mounting plate (114). The spring (116) is fixedly connected to the cutting plate (109).

4. The cutting device for making plastic packaging bags according to claim 3, characterized in that: The hot-press sealing machine (108) is located between the pressing roller (113) and the cutting plate (109).

5. The cutting device for making plastic packaging bags according to claim 4, characterized in that: When the cutting plate (109) is located on the side of the conveyor belt (107) near the conveyor table (101), the spring (116) on the cutting plate (109) is in a compressed state.

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