A bottom seaming device

Abstract

This utility model relates to the field of woven bag processing technology, and in particular to a bottom-sewing device, including a conveying assembly, a guiding assembly, and a cutting assembly. The conveying assembly includes a first conveyor extending in a front-to-back direction, with the top surface of the rear end of the first conveyor serving as a bag outlet. The guiding assembly includes an air supply nozzle located behind the bag outlet, facing rearward or diagonally rearward, and positioned higher or lower than the bag outlet. The cutting assembly is located behind the air supply nozzle and includes a fixed blade, a moving blade, and a cutting driver. The moving blade is located at the rear end of the fixed blade, with its top surface supporting the hot-melt paper. The cutting driver is connected to the moving blade to drive its movement, thereby cutting the hot-melt paper. In summary, the bottom-sewing device of this utility model does not require manual traction, has higher safety, and reduces safety hazards in this processing technology.

Description

Technical Field

[0001] This utility model relates to the field of woven bag processing technology, and in particular to a bottom sewing device. Background Technology

[0002] In the production process of plastic woven bag sewing machines, after the hot melt paper and the sewing stitch of the paper-plastic bag are pressed, glued, and shaped, an electric cutter is used to cut the continuous hot melt paper at set intervals to separate adjacent paper-plastic bags. When the equipment stops to replace the hot melt paper, breaks a thread, or when the device is idle, a section of hot melt paper 500 to 1000 mm long that is not wrapped in the paper-plastic bag needs to be manually pulled to prevent the hot melt paper from going astray or jumping up and down, ensuring that the hot melt paper can be cut smoothly. However, when manually pulling, the distance between the worker and the cutter is relatively close, and the cutter can easily injure the worker, posing a safety hazard. Utility Model Content

[0003] The purpose of this utility model is to provide a bottom-sewing device to solve the technical problem that safety accidents are prone to occur when manually pulling hot melt paper in the production process of woven bags, resulting in poor safety and potential safety hazards.

[0004] To achieve the above objectives, this utility model provides a sewing device, including a conveying assembly, a guiding assembly, and a cutting assembly. The conveying assembly includes a first conveyor extending in a front-rear direction, with the top surface of the rear end of the first conveyor serving as a bag outlet. The guiding assembly includes an air supply nozzle located behind the bag outlet, facing rearward or diagonally rearward, and positioned higher or lower than the bag outlet. The cutting assembly is located behind the air supply nozzle and includes a fixed blade, a moving blade, and a cutting driver. The moving blade is located at the rear end of the fixed blade, with its top surface supporting the hot melt paper. The cutting driver is connected to the moving blade to drive the moving blade to move and cut the hot melt paper.

[0005] Optionally, the guiding assembly further includes two air supply nozzles, which are spaced apart in the vertical direction, with one of the air supply nozzles lower than the bag outlet and the other higher than the bag outlet.

[0006] Optionally, the distance between the air supply nozzle and the bag outlet in the vertical direction is 3mm to 5mm.

[0007] Optionally, the guiding assembly further includes a position sensor and a valve, the position sensor being connected to the valve, the valve being connected to the air nozzle, the position sensor being positioned above the first conveyor, and the position sensor being used to detect paper-plastic bags located on the first conveyor.

[0008] Optionally, the conveying assembly further includes a second conveyor extending in a front-rear direction. The second conveyor is located behind the cutting assembly. The second conveyor includes a conveying frame, a conveying driver, two conveying wheels, and multiple conveyor belts. The two conveying wheels are spaced apart from each other in the front-rear direction on the conveying frame and are rotatably connected to the conveying frame. The multiple conveyor belts are spaced apart from each other in the left-right direction on the conveying wheels and are wound around the two conveying wheels. The conveying driver is connected to the conveying wheels and is used to drive the conveying wheels to rotate, thereby driving the conveyor belts to move.

[0009] Optionally, the second conveyor further includes a plurality of protective baffles, the protective baffles being fixed to the conveyor frame and embedded between two of the conveyor wheels. The shape of the protective baffles relative to the ends of the conveyor wheels is adapted to the conveyor wheels. The protective baffles are embedded in the conveyor belt and surround the protective baffles.

[0010] Optionally, a rear bag folder may also be included, which is located behind the second conveyor.

[0011] Optionally, the conveying assembly further includes a third conveyor, which is provided with a clamping conveying channel. The front end of the clamping conveying channel is disposed corresponding to the rear end of the second conveyor, and the rear end of the clamping conveying channel is disposed corresponding to the rear bag stacker.

[0012] Optionally, the assembly may also include a front bag folder, a sewing machine, a paper folder, a heater, and a presser. The conveying assembly may also include a fourth conveyor located in front of the first conveyor. The front bag folder is located in front of the fourth conveyor. The sewing machine, the paper folder, the heater, and the presser are arranged sequentially from front to back on the first conveyor.

[0013] Optionally, it may also include a plurality of first pressure rollers, which are spaced apart above the first conveyor in a front-to-back direction.

[0014] Compared with the prior art, the seam-sewing device implemented in this utility model has the following advantages:

[0015] In this invention's bottom-sewing device, the first conveyor of the conveying assembly can be equipped with a sewing machine, a folding machine, a heater, and a presser. The first conveyor transports the paper-plastic bag from front to back, and the sewing machine, folding machine, heater, and presser process the paper-plastic bag sequentially. After the hot-melt paper is pressed onto the paper-plastic bag, the product is conveyed backward at the bag exit section of the first conveyor. The product flies over or below the air nozzle, and then the air nozzle sprays gas backward or diagonally backward to guide the hot-melt paper at the end of the product to the fixed blade of the cutting assembly. The top surface of the fixed blade supports the product, and after the product moves further backward and passes the fixed blade, the moving blade located at the rear end of the fixed blade cuts the hot-melt paper. In summary, this invention's bottom-sewing device can guide the hot-melt paper onto the paper-plastic bag through the air nozzle after pressing it, ensuring that it falls to the cutting assembly for further processing. No manual traction is required during this process, resulting in higher safety and reducing safety hazards in the processing technology. Attached Figure Description

[0016] Figure 1 This is the front view of the bottom-sewing device of this utility model.

[0017] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0018] Figure 3 The bottom sealing device of this utility model has a top view of the product.

[0019] Figure 4 for Figure 3 A magnified view of part B in the middle.

[0020] Reference numerals: 1. Conveying assembly; 11. First conveyor; 111. Bag outlet; 12. Second conveyor; 121. Conveying frame; 122. Conveying wheel; 123. Conveying belt; 124. Protective baffle; 13. Third conveyor; 131. Clamping conveying channel; 14. Fourth conveyor; 2. Guiding assembly; 21. Air nozzle; 22. Position sensor; 3. Cutting assembly; 31. Fixed knife; 32. Moving knife; 4. Front bag folder; 5. Sewing machine; 6. Folding machine; 7. Heater; 8. Presser; 9. Rear bag folder; 10. First pressure roller; 20. Product; 201. Paper-plastic bag; 202. Hot melt paper. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] like Figures 1 to 4 As shown, a sewing device of this utility model includes a conveying assembly 1, a guiding assembly 2, and a cutting assembly 3. The conveying assembly 1 includes a first conveyor 11 extending in a front-rear direction, with the top surface of the rear end of the first conveyor 11 serving as a bag outlet 111. The guiding assembly 2 includes an air supply nozzle 21, which is located behind the bag outlet 111. The air supply nozzle 21 is positioned rearward or obliquely rearward, and is higher or lower than the bag outlet 111. The cutting assembly 3 is located behind the air supply nozzle 21 and includes a fixed blade 31, a movable blade 32, and a cutting driver. The movable blade 32 is located at the rear end of the fixed blade 31, and the top surface of the fixed blade 31 is used to support the hot melt paper 202. The cutting driver is connected to the movable blade 32 to drive the movable blade 32 to move, thereby cutting the hot melt paper 202.

[0025] In the above technical solution, the first conveyor 11 of the conveying assembly 1 can be equipped with a sewing machine 5, a paper folding machine 6, a heater 7, and a presser 8. The first conveyor 11 conveys the paper-plastic bag 201 from front to back. The sewing machine 5, the paper folding machine 6, the heater 7, and the presser 8 can process the paper-plastic bag 201 in sequence. After the hot melt paper 202 is pressed onto the paper-plastic bag 201, the product 20 is sent backward through the bag outlet 111 of the first conveyor 11. The product 20 flies over or below the air nozzle 21. Then, the air nozzle 21 sprays gas backward or diagonally backward to guide the hot melt paper 202 at the end of the product 20 to the fixed blade 31 of the cutting assembly 3. The top surface of the fixed blade 31 supports the product 20. After the product 20 moves further backward and passes the fixed blade 31, the moving blade 32 located at the rear end of the fixed blade 31 can cut the hot melt paper 202. In summary, the bottom-sewing device of this utility model can guide the hot melt paper 202 to the paper-plastic bag 201 through the air nozzle 21 after pressing the hot melt paper 202 to the paper-plastic bag 201, ensuring that it can fall to the cutting component 3 for the next step of processing. During this process, no manual traction is required, which is safer and reduces the safety hazards in the processing technology.

[0026] The cutting assembly 3 can be positioned directly opposite the bag outlet 111, the top surface of the fixed blade 31 is flush with the bag outlet 111, and the air nozzle 21 is lower than the bag outlet 111 and blows air in a direction that is directly behind or diagonally upward, so as to ensure that the product 20 can reach the fixed blade 31.

[0027] The cutting driver can be a motor (servo motor, stepper motor) or a piston cylinder (pneumatic cylinder, hydraulic cylinder and electric cylinder, etc.) to drive the moving blade 32 to perform rotational or reciprocating linear movement to cut the hot melt paper 202.

[0028] Furthermore, the guiding component 2 also includes two air supply nozzles 21, which are spaced apart in the vertical direction, with one of the air supply nozzles 21 being lower than the bag outlet 111 and the other being higher than the bag outlet 111.

[0029] In this process, two air nozzles 21 simultaneously deliver air to the end of the hot melt paper 202 of the product 20 to ensure that the hot melt paper 202 moves along a set trajectory. Specifically, the two air nozzles 21 can simultaneously deliver air in the direction directly behind, or one air nozzle 21 can deliver air in the direction directly behind while the other air nozzle 21 delivers air in the direction diagonally behind, or both air nozzles 21 can simultaneously deliver air in the direction diagonally behind.

[0030] Furthermore, the distance between the air supply nozzle 21 and the bag outlet 111 in the vertical direction is 3mm to 5mm, so as to reduce the probability of the product 20 colliding with the air supply nozzle 21 when it flies out of the bag outlet 111.

[0031] Furthermore, the guiding component 2 also includes a position sensor 22 and a valve. The position sensor 22 is connected to the valve, and the valve is connected to the air nozzle 21. The position sensor 22 is positioned above the first conveyor 11 and is used to detect the paper-plastic bag 201 located on the first conveyor 11.

[0032] The guiding component 2 may also include a controller, which is connected to the position sensor 22 and the valve. The position sensor 22 may be a photoelectric sensor, located on one side or above the first conveyor 11 in the left-right direction. When the position sensor 22 detects that multiple paper-plastic bags 201 have passed by, the controller can determine that the product 20 has been smoothly placed on the cutting component 3, and then close the valve to save energy. When the machine has just been modified, or when the position sensor 22 does not detect the paper-plastic bags 201 and the hot melt paper 202, the valve is opened.

[0033] Furthermore, the conveying assembly 1 also includes a second conveyor 12 extending in the front-rear direction. The second conveyor 12 is located behind the cutting assembly 3. The second conveyor 12 includes a conveying frame 121, a conveying driver, two conveying wheels 122, and multiple conveyor belts 123. The two conveying wheels 122 are spaced apart from the conveying frame 121 in the front-rear direction and are rotatably connected to the conveying frame 121. The multiple conveyor belts 123 are spaced apart from the conveying wheels 122 in the left-right direction and are wound around the two conveying wheels 122. The conveying driver is connected to the conveying wheels 122 and is used to drive the conveying wheels 122 to rotate, thereby driving the conveyor belts 123 to move.

[0034] The second conveyor 12 can transport the product 20 from front to back. The structure of the conveyor belt 123 being spaced apart can facilitate heat dissipation of the hot melt paper 202 and facilitate the cleaning of the debris generated after the hot melt paper 202 is cut.

[0035] Furthermore, the second conveyor 12 also includes a plurality of protective baffles 124, the protective baffles 124 being fixed to the conveyor frame 121, the protective baffles 124 being embedded between two conveyor wheels 122, the shape of the protective baffles 124 relative to the end of the conveyor wheels 122 being adapted to the conveyor wheels 122, and the protective baffles 124 being embedded between the conveyor belts 123, specifically, the protective baffles 124 being provided between two adjacent conveyor belts 123, and the conveyor belts 123 surrounding the protective baffles 124.

[0036] Among them, workers can inspect and clean up the cut hot melt paper 202 that does not meet the standard length at the second conveyor 12. The protective baffle 124 is used to fill the gap between adjacent conveyor belts 123 to reduce the risk of workers getting their hands caught. In addition, the protective baffle 124 may have a semi-circular notch at the end of the conveyor wheel 122 to make way for the conveyor wheel 122.

[0037] Furthermore, the protective baffle 124 may be thicker than the conveyor belt 123 in the left and right directions, and extend into the conveyor belt 123 by about 30mm in the left and right directions. The distance between the protective baffle 124 and the conveyor wheel 122 is about 5mm, and the interval between the protective baffle 124 and the conveyor belt 123 is about 5mm. The protective baffle 124 may be connected to the conveyor frame 121 by a screw.

[0038] Furthermore, it also includes a rear bag folder 9, which is located behind the second conveyor 12.

[0039] The rear stacker 9 may include a rear stacking platform, a push plate, an alignment cylinder, a gripping claw, a gripping cylinder, and a stacking sensor. The gripping cylinder is connected to the gripping claw and can drive the gripping claw to grip the product 20 located in front of the rear stacking platform and place it on the rear stacking platform. Furthermore, it can grip the top surface of other products 20 located on the rear stacking platform to achieve stacking. Specifically, the gripping claw can grip the product 20 through a suction cup. Furthermore, the alignment cylinder is connected to the push plate and can drive the push plate to abut against the side of the product 20 located on the rear stacking platform to align the stacked products 20. The stacking sensor can be used to detect whether there is a product 20 on the rear stacking platform and whether the products 20 are stacked neatly. The sensor stacking can be a photoelectric sensor.

[0040] Furthermore, the conveying assembly 1 also includes a third conveyor 13, which is provided with a clamping conveying channel 131. The front end of the clamping conveying channel 131 is provided corresponding to the rear end of the second conveyor 12, and the rear end of the clamping conveying channel 131 is provided corresponding to the rear bag stacker 9.

[0041] The third conveyor 13 clamps the product 20 and transports it from front to back. The clamping and conveying channel 131 can be formed by two sets of belts. The two sets of belts run simultaneously to clamp and drive the product 20 between them, so that it can move smoothly backward, backward and backward and backward and upward, preventing it from falling or sliding along the slope direction.

[0042] Furthermore, it also includes a front bag folder 4, a sewing machine 5, a paper folder 6, a heater 7, and a presser 8. The conveying assembly 1 also includes a fourth conveyor 14, which is located in front of the first conveyor 11. The front bag folder 4 is located in front of the fourth conveyor 14. The sewing machine 5, the paper folder 6, the heater 7, and the presser 8 are arranged sequentially from front to back on the first conveyor 11.

[0043] The structure of the front bag stacker 4 is similar to that of the rear bag stacker, which can stack and align the paper-plastic bags 201 and pick them up onto the fourth conveyor 14; the sewing machine can sew the bottom of the paper-plastic bags 201; the folding device can fold the sheet-like hot melt paper 202 into a V-shape and wrap it around the seam of the composite bag bottom; the heater 7 can heat the hot melt paper 202 to 100 to 125°C; the presser 8 includes multiple pairs of second pressure rollers spaced apart in the vertical direction, which can apply pressure to the hot melt paper 202 and the paper-plastic bags 201 from above and below respectively, so that the two are bonded and shaped; in addition, the sewing machine, sewing device 5, folding device 6, heater 7 and presser 8 are located on one side of the first conveyor 11 in the left-right direction for processing.

[0044] Furthermore, in the bottom sewing device, the front stacker, sewing machine, origami 6, heater 7, presser 8 and rear stacker are arranged on the conveyor, and the aforementioned effects are conventional technical means in the field. Some specific structures will not be described in detail here.

[0045] Furthermore, it also includes a plurality of first pressure rollers 10, which are spaced apart above the first conveyor 11 in the front-back direction.

[0046] The first roller is used to press the paper-plastic bag 201 to ensure that it can run smoothly on the first conveyor 11, thereby ensuring the processing of the paper-plastic bag 201.

[0047] The structures of each conveyor can be similar.

[0048] Furthermore, fixed setting and fixed connection refer to the fixed relative positional relationship of two components, including but not limited to fixing by connectors, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap-fit ​​connection.

[0049] Furthermore, rotatable connection and rotatable setting refer to the ability of two connected components to rotate, including but not limited to connections via bearings or clearance fits.

[0050] Furthermore, the connectors include, but are not limited to, fasteners, straps, ropes, pneumatic connectors, hydraulic connectors, flanges, Velcro, and buttons.

[0051] In summary, this utility model embodiment provides a bottom-sewing device, the technical effects of which are as follows:

[0052] In the bottom sewing device of this utility model, the first conveyor 11 of the conveying component 1 can be equipped with a sewing machine 5, a paper folding machine 6, a heater 7, and a presser 8. The first conveyor 11 conveys the paper-plastic bag 201 from front to back. The sewing machine 5, the paper folding machine 6, the heater 7, and the presser 8 can process the paper-plastic bag 201 in sequence. After the hot melt paper 202 is pressed onto the paper-plastic bag 201, the product 20 is sent backward through the bag outlet 111 of the first conveyor 11. The product 20 flies over or below the air nozzle 21. Then, the air nozzle 21 sprays gas backward or diagonally backward to guide the hot melt paper 202 at the end of the product 20 to the fixed blade 31 of the cutting component 3. The top surface of the fixed blade 31 supports the product 20. After the product 20 moves further backward and passes the fixed blade 31, the moving blade 32 located at the rear end of the fixed blade 31 can cut the hot melt paper 202. In summary, the bottom-sewing device of this utility model can guide the hot melt paper 202 to the paper-plastic bag 201 through the air nozzle 21 after pressing the hot melt paper 202 to the paper-plastic bag 201, ensuring that it can fall to the cutting component 3 for the next step of processing. During this process, no manual traction is required, which is safer and reduces the safety hazards in the processing technology.

[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A bottom seaming device characterized by, include, The conveying assembly (1) includes a first conveyor (11) extending in the front-rear direction, and the top surface of the rear end of the first conveyor (11) is provided as a bag outlet (111). The guide component (2) includes an air supply nozzle (21) located behind the bag outlet (111). The air supply nozzle (21) is positioned to face rearward or to face obliquely rearward, and is higher or lower than the bag outlet (111). The cutting assembly (3) is located behind the air nozzle (21). The cutting assembly (3) includes a fixed blade (31), a moving blade (32), and a cutting driver. The moving blade (32) is located at the rear end of the fixed blade (31). The top surface of the fixed blade (31) is used to support the hot melt paper (202). The cutting driver is connected to the moving blade (32) to drive the moving blade (32) to move and cut the hot melt paper (202).

2. The bottom seaming apparatus of claim 1 wherein, The guide assembly (2) also includes two air supply nozzles (21), which are spaced apart in the vertical direction. One of the air supply nozzles (21) is lower than the bag outlet (111) and the other is higher than the bag outlet (111).

3. The bottom seaming apparatus of claim 1 wherein, The distance between the air supply nozzle (21) and the bag outlet (111) in the vertical direction is 3mm to 5mm.

4. The bottom seaming apparatus of claim 1 wherein, The guiding component (2) further includes a position sensor (22) and a valve. The position sensor (22) is connected to the valve, and the valve is connected to the air nozzle (21). The position sensor (22) is positioned above the first conveyor (11) and is used to detect the paper-plastic bag (201) located on the first conveyor (11).

5. The bottom seaming apparatus of claim 1 wherein, The conveying assembly (1) further includes a second conveyor (12) extending in the front-rear direction. The second conveyor (12) is located behind the cutting assembly (3). The second conveyor (12) includes a conveying frame (121), a conveying driver, two conveying wheels (122), and multiple conveyor belts (123). The two conveying wheels (122) are spaced apart in the front-rear direction on the conveying frame (121). The conveying wheels (122) are rotatably connected to the conveying frame (121). The multiple conveyor belts (123) are spaced apart in the left-right direction on the conveying wheels (122). The conveyor belts (123) are wound around the two conveying wheels (122). The conveying driver is connected to the conveying wheels (122) and is used to drive the conveying wheels (122) to rotate, thereby driving the conveyor belts (123) to move.

6. The bottom seaming apparatus of claim 5 wherein, The second conveyor (12) further includes a plurality of protective baffles (124), the protective baffles (124) being fixed to the conveyor frame (121), the protective baffles (124) being embedded between the two conveyor wheels (122), the shape of the protective baffles (124) relative to the end of the conveyor wheels (122) being adapted to the conveyor wheels (122), the protective baffles (124) being embedded in the conveyor belt (123), and the conveyor belt (123) surrounding the protective baffles (124).

7. The bottom seaming apparatus of claim 5 wherein, It also includes a rear bag stacker (9) located behind the second conveyor (12).

8. The bottom seaming apparatus of claim 7, wherein, The conveying assembly (1) further includes a third conveyor (13), which is provided with a clamping conveying channel (131). The front end of the clamping conveying channel (131) is provided corresponding to the rear end of the second conveyor (12), and the rear end of the clamping conveying channel (131) is provided corresponding to the rear bag stacker (9).

9. The bottom seaming apparatus of claim 1 wherein, It also includes a front bag folder (4), a sewing machine (5), a paper folder (6), a heater (7), and a presser (8). The conveying assembly (1) also includes a fourth conveyor (14), which is located in front of the first conveyor (11). The front bag folder (4) is located in front of the fourth conveyor (14). The sewing machine (5), the paper folder (6), the heater (7), and the presser (8) are arranged sequentially from front to back on the first conveyor (11).

10. The bottom seaming apparatus of claim 1 wherein, It also includes a plurality of first pressure rollers (10), which are spaced apart above the first conveyor (11) in the front-back direction.

Images