Woven bag upper heat sealing machine

Abstract

This utility model provides a heat-sealing machine for the top opening of woven bags, belonging to the field of woven bag processing technology. It includes a conveying assembly, a heating section, and a re-pressing mechanism. The conveying assembly includes two drive belts, each with a separator strip and locking pads on its outer surface. The heating section includes a pressing seat and a pressing and heating assembly. The re-pressing mechanism includes a pressure roller and a re-pressing seat. This utility model uses two cooperating drive belts, with separator strips and locking pads on the belts forming multiple individual clamping areas for clamping and conveying the woven bags. The woven bags automatically feed and discharge at both ends as they pass between the two drive belts. After being heated and fused by the cooperation between the pressing seat and the pressure block in the heating section, the woven bags enter the re-pressing mechanism, where they are dynamically clamped and fixed by the pressure roller and the re-pressing seat.

Description

Technical Field

[0001] This utility model belongs to the field of woven bag processing technology, specifically referring to a heat sealing machine for the top opening of a woven bag. Background Technology

[0002] Packaging bags are bags used to package various goods, facilitating transportation and storage during production and distribution. They are widely used in daily life and industrial production. Plastic packaging bags include woven plastic bags and plastic film bags. The former are lightweight, high-strength, and corrosion-resistant, while the latter, with a plastic film lining, provides moisture and humidity protection. Packaging bags require heat sealing machines during production; these machines primarily seal the packaging.

[0003] Existing heat-sealing machines for woven bags use a combined heating, melting, and pressing mechanism. The combined pressure for heat sealing comes solely from the pressure applied during the heating and melting process. After heat sealing, the woven bags need to cool down on their own. The lack of external pressing force during the cooling stage can easily lead to insufficient connection strength at the heat-sealed joint and defects at the seams. Furthermore, existing heat-sealing machines use a single lifting heating block to perform heat sealing operations on the woven bags one by one, resulting in low processing efficiency. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a heat sealing machine for the top opening of woven bags, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model is as follows: A heat-sealing machine for the top opening of a woven bag is proposed, including a conveying assembly, comprising two vertically distributed transmission belts, the outer surface of which is provided with multiple dividing strips, and locking pads are provided between the dividing strips; a heating part, including a pressing seat located at one end of the rear side of the conveying assembly, and a liftable pressing and heating component located above the pressing seat; a repressing mechanism, including a repressing seat located on one side of the heating part along the conveying direction between the transmission belts, the surface of which is provided with multiple downwardly pressing rollers, the pressing force of which gradually increases from the edge to the center; wherein, the repressing mechanism is configured such that after the woven bag is clamped and conveyed to the heating part by the locking pads between the two transmission belts for heat sealing, the multiple pressure rollers repress the top opening of the woven bag for heat sealing.

[0006] Furthermore, the woven bag top heat sealing machine also includes a frame, the surface of which is provided with an installation plate, the transmission belts are respectively located on the upper and lower sides of one side of the installation plate, and a horizontal heat sealing groove is opened in the middle of the side of the installation plate away from the transmission belt, and the pressing seat and the re-pressing seat are both located at the bottom of the inside of the heat sealing groove.

[0007] Furthermore, mounting baffles are fixedly connected to both sides of the guide platform surface. On the side of the mounting plate where the heat sealing groove is opened, an extrusion groove is opened above the pressing seat. Multiple synchronous extrusion cylinders are set at the top of the extrusion groove. A lifting plate is connected to the output end of the bottom of the synchronous extrusion cylinder. A pressing block with heating function is set at the bottom of the lifting plate, and several guide rods are set at the top of the pressing block. The top of the guide rods extends to the top surface of the lifting plate. Multiple compression springs are set between the lifting plate and the pressing block, and the compression springs are sleeved on the guide rods.

[0008] Furthermore, on one side of the mounting plate where the extrusion groove is formed, an installation groove is formed above the pressure seat. Multiple adjusting screws are threaded to the bottom of the installation groove. The bottom of the adjusting screws extends into the heat sealing groove. A pressure rod is inserted into the bottom of the adjusting screw. Each pressure rod is fitted with an extrusion spring. The bottom of the pressure roller is connected to the pressure rod.

[0009] Furthermore, the bottom end of the pressure block protrudes downwards, and the top surface of the pressing seat is set in a concave shape. Beneficial effects

[0010] Two cooperating drive belts, with separators and locking pads on the belts, form multiple individual clamping areas for holding and conveying woven bags. The bags automatically feed and discharge between the two drive belts, undergoing continuous heat sealing, thus improving heat sealing efficiency. After being heated and fused by the cooperation between the pressing seat and the pressing block in the heating section, the woven bags enter the re-pressing mechanism, where they are dynamically clamped and fixed in shape by the pressure rollers and the re-pressing seat. Attached Figure Description

[0011] Figure 1 A three-dimensional schematic diagram of the heat-sealing machine for the top opening of woven bags proposed in this utility model. Figure 1 ; Figure 2 A three-dimensional schematic diagram of the heat-sealing machine for the top opening of woven bags proposed in this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the planar structure of the heat sealing machine for the top opening of woven bags proposed in this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the heat sealing machine for the top opening of the woven bag proposed in this utility model.

[0012] The components include: 1. Conveying assembly; 101. Drive belt; 102. Separator bar; 103. Engaging pad; 2. Heating unit; 201. Pressing seat; 202. Pressing heating assembly; 3. Repressing mechanism; 301. Repressing seat; 302. Pressure roller; 4. Frame; 5. Mounting plate; 6. Heat sealing groove; 7. Extrusion groove; 8. Synchronous extrusion cylinder; 9. Lifting plate; 10. Pressing block; 11. Guide rod; 12. Compression spring; 13. Mounting groove; 14. Adjusting screw; 15. Pressure rod; 16. Extrusion spring.

[0013] The accompanying drawings are provided to further illustrate the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0014] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0015] As mentioned earlier, existing heat-sealing machines for woven bags use a combined heating, melting, and pressing mechanism for heat sealing. The combined pressure for heat sealing comes only from the pressure during the heating and melting process. After heat sealing, the woven bag needs to cool down on its own. The lack of external pressing force during the cooling stage can easily lead to insufficient connection strength at the heat-sealed joint and defects at the seam. Furthermore, existing heat-sealing machines use a single lifting heating block to perform heat sealing operations on the woven bags one by one, resulting in low processing efficiency.

[0016] To address this, the present invention provides a heat-sealing machine for the top of woven bags, which can form multiple individual clamping areas for clamping and conveying woven bags through two cooperating transmission belts 101, with the partition strips 102 and clamping pads 103 on the transmission belts 101. The woven bags automatically form feeding and discharging at both ends between the two transmission belts 101. After the woven bags are heated and fused by the cooperation between the pressing seat 201 and the pressing block 10 in the heating section 2, they enter the re-pressing mechanism 3, where they are dynamically clamped and fixed by the pressure roller 302 and the re-pressing seat 301.

[0017] like Figures 1-4As shown in the figure, this utility model provides a heat sealing machine, particularly a heat sealing machine for the top of a woven bag, including a conveying assembly 1, a heating section 2, a pressing mechanism 3, a frame 4, a mounting plate 5, and a horizontally arranged heat sealing groove 6 opened in the middle of one side of the mounting plate 5. The conveying assembly 1 includes two drive belts 101 disposed above and below the front surface of the mounting plate 5. The two drive belts 101 are driven by drive wheels disposed on both sides of the front surface of the mounting plate 5. The drive wheels and drive belts 101 are engaged, and the two drive belts 101 clamp the heat sealing groove 6 opened on the mounting plate 5 in the middle. Multiple separators 102 are provided on the outer surface of both transmission belts 101, and a locking pad 103 is provided between any two separators 102 on the side near the heat sealing groove 6. The upper and lower transmission belts 101 cooperate with each other. Under the control of the PLC control system, the two synchronous motors on the upper and lower sides of the mounting plate 5 drive the two transmission belts 101 synchronously. The separators 102 on the two transmission belts 101 correspond to each other, and the locking pads 103 on the two transmission belts 101 stick together to clamp and fix the woven bag that needs to be heat sealed at the top, and then transport it.

[0018] On the rear side of the mounting plate 5, along the conveying direction of the woven bag, a pressing seat 201 and a re-pressing seat 301 are sequentially arranged at the bottom of the heat sealing groove 6. On the rear side of the mounting plate 5, along the conveying direction of the woven bag, an extrusion groove 7 and a mounting groove 13 are sequentially opened above the heat sealing groove 6. The extrusion groove 7 and the heat sealing groove 6 are interconnected. Multiple synchronous extrusion cylinders 8 are fixedly connected to the top of the extrusion groove 7. A lifting plate 9 is connected to the telescopic end of the bottom of the synchronous extrusion cylinders 8. The heating part 2 also includes a pressing heating assembly 202 arranged below the lifting plate 9. The pressing and heating assembly 202 includes a pressing block 10 with heating function set at the bottom of the lifting plate 9. Guide rods 11 are installed on both sides of the upper surface of the pressing block 10. The top of the guide rods 11 extends through to the upper surface of the lifting plate 9, and compression springs 12 are sleeved on the guide rods 11. The compression springs 12 press the pressing block 10 downward, and there is friction between the compression springs 12 and the guide rods 11, which provides damping for the deformation of the compression springs 12. The pressing block 10 moves to the upper opening of the woven bag on the pressing seat 201 for hot pressing and fusion. As the lifting plate 9 descends, the pressing force of the pressing block 10 on the upper opening of the woven bag gradually increases.

[0019] The interior of the mounting groove 13 and the interior of the heat sealing groove 6 are completely separated. Multiple adjusting screws 14 are threadedly connected to the bottom of the interior of the mounting groove 13, with the bottom ends of the adjusting screws 14 extending into the interior of the heat sealing groove 6. A pressure rod 15 is inserted into the bottom end of the adjusting screw 14, and a pressure roller 302 is provided at the bottom end of the pressure rod 15. The pressure roller 302 can roll along the direction of woven bag conveying on the upper surface of the pressure seat 301. Each pressure rod 15 is fitted with a compression spring 16. Figure 3 and Figure 4 As shown, the compression spring 16 on the pressure bar 15 generates a larger downward pressure on the two middle pressure rollers 302, while the downward pressure generated by the pressure bar 15 near the edge on the pressure rollers 302 gradually decreases, which facilitates the woven bag to enter the pressure rollers 302 and the secondary pressure seat 301 for fusion and secondary pressure bonding after the heat sealing is completed.

[0020] In summary, this utility model uses two cooperating transmission belts 101 to form multiple individual clamping areas for clamping and conveying woven bags through the separator strips 102 and locking pads 103 on the transmission belts 101. The woven bags automatically form feeding and discharging at both ends between the two transmission belts 101. After the woven bags are heated and fused by the cooperation between the pressing seat 201 and the pressing block 10 in the heating part 2, they enter the repressing mechanism 3 and are dynamically clamped and fixed by the pressing roller 302 and the repressing seat 301.

[0021] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A woven bag top sealer, characterized by, include: The conveyor assembly (1) includes two vertically distributed drive belts (101), the outer surface of which is provided with a plurality of partition strips (102), and the partition strips (102) are provided with locking pads (103) between them. The heating unit (2) includes a pressing seat (201) disposed at one end of the rear side of the conveying assembly, and a lifting pressing heating component (202) is disposed above the pressing seat (201). The repressing mechanism (3) includes a repressing seat (301) disposed on one side of the heating part (2) along the conveying direction between the transmission belt (101). The surface of the repressing seat (301) is provided with a plurality of downwardly pressing rollers (302), and the pressing force of the rollers (302) gradually increases from the edge to the center. The repressing mechanism (3) is configured such that after the woven bag is held and transported to the heating section (2) by the clamping pad (103) between the two transmission belts (101) for heat sealing, multiple pressure rollers (302) repress the heat-sealed part of the woven bag at the top.

2. The woven bag spout heat sealer according to claim 1, wherein, The heat sealing machine for the top of the woven bag also includes a frame (4), on the surface of the frame (4) is a mounting plate (5), the transmission belt (101) is respectively set on the top and bottom of one side of the mounting plate (5), and a horizontal heat sealing groove (6) is opened in the middle of the side of the mounting plate (5) away from the transmission belt (101). The pressing seat (201) and the re-pressing seat (301) are both set at the bottom of the inside of the heat sealing groove (6).

3. The woven bag spout heat sealer according to claim 2, wherein, On one side of the mounting plate (5) with a heat-sealing groove (6), an extrusion groove (7) is provided above the pressing seat (201). Multiple synchronous extrusion cylinders (8) are provided at the top of the extrusion groove (7). A lifting plate (9) is connected to the output end of the synchronous extrusion cylinder (8). A pressing block (10) with a heating function is provided at the bottom of the lifting plate (9). Several guide rods (11) are provided at the top of the pressing block (10). The top of the guide rods (11) extends to the top surface of the lifting plate (9). Multiple compression springs (12) are provided between the lifting plate (9) and the pressing block (10). The compression springs (12) are sleeved on the guide rods (11).

4. The heat-sealing machine for the top opening of a woven bag according to any one of claims 1 or 3, characterized in that, On one side of the mounting plate (5) with the extrusion groove (7), an installation groove (13) is provided above the pressure seat (301). The bottom of the installation groove (13) is threaded with multiple adjusting screws (14). The bottom of the adjusting screws (14) extends into the heat sealing groove (6). A pressure rod (15) is inserted into the bottom of the adjusting screw (14). Each pressure rod (15) is fitted with an extrusion spring (16). The bottom of the pressure roller (302) is connected to the pressure rod (15).

5. The heat-sealing machine for the top opening of a woven bag according to claim 3, characterized in that, The bottom end of the pressure block (10) protrudes downwards, and the top surface of the pressing seat (201) is set in a concave shape.

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