Traction device for polyethylene medicinal bag production

Abstract

The utility model discloses a traction device for polyethylene medicinal bag production, which comprises a base, two groups of first mounting racks are fixedly mounted on the base, a traction roller is arranged between the two groups of first mounting racks, a polyethylene bag body is curled on the outer surface of the traction roller, two groups of second mounting racks are fixedly mounted on the base, and the polyethylene bag body is curled on the outer surface of the traction roller. A cross beam is fixedly connected between the two second mounting frames, two sliding grooves are formed in the bottom of the cross beam, sliding seats are slidably mounted in the two sliding grooves, connecting rods are rotatably mounted at the bottoms of the sliding seats, fixing seats are rotatably mounted at the bottoms of the connecting rods, and mounting plates are fixedly mounted at the bottoms of the fixing seats; the two ends of the mounting plate are fixedly connected with guide plates. According to the polyethylene bag collecting device, the two sides of the collected polyethylene bags can be limited all the time through the guide plates, it is guaranteed that the phenomenon that the edges of the polyethylene bags are turned unevenly is avoided during collection, and the production yield of the polyethylene medical bags is increased.

Description

Technical Field

[0001] The utility model relates to the field of polyethylene medicinal bag production equipment, in particular to a traction device for the production of polyethylene medicinal bags. Background Art

[0002] Polyethylene medicinal bags are an important medicinal packaging material. They are made of polyethylene particles as raw materials. Medicinal polyethylene bags are widely used in the transportation and temporary storage of raw medicinal powders, food powders, and chemical powders.

[0003] In order to further understand the traction device for producing polyethylene medicinal bags in the prior art, after searching, the Chinese patent with announcement number: CN217454919U discloses a traction device for a film blowing machine for producing medicinal low-density polyethylene bags, including a collecting frame, a collecting roller is arranged at the middle part of the left side of the inner cavity of the collecting frame through a bearing, a guide roller is arranged at the middle and upper end of the right side of the inner cavity of the collecting frame, a movable frame cover is arranged at the upper end of the collecting frame, a feeding slot is opened at the middle and upper end of the right side of the collecting frame, and a glass plate is arranged at the middle part of the left side of the collecting frame.

[0004] After exploration and analysis, the patent has the following shortcomings in actual use: although the patent uses a movable pressure roller to increase the tightness of the polyethylene bag during collection, the polyethylene bag will shift axially on the collection roller as the collection roller rotates. When the offset distance is too large, the polyethylene bag collected on the collection roller will have uneven curling, affecting the yield rate of polyethylene medicinal bag production. Utility Model Content

[0005] In view of the technical problem that the existing polyethylene bag will be offset due to axial movement on the collecting roller as the collecting roller rotates, and when the offset distance is too large, the polyethylene bag collected on the collecting roller will have uneven curling, thereby affecting the yield rate of polyethylene medicinal bag production, the utility model provides a traction device for polyethylene medicinal bag production.

[0006] The technical solution adopted by the utility model is: it comprises a base, two groups of first mounting frames are fixedly installed on the base, a traction roller is arranged between the two groups of the first mounting frames, a polyethylene bag body is curled on the outer surface of the traction roller, two groups of second mounting frames are fixedly installed on the base, a crossbeam is fixedly connected between the two groups of the second mounting frames, two groups of slide grooves are opened at the bottom of the crossbeam, a slide seat is slidably installed in the two groups of the slide grooves, a connecting rod is rotatably installed at the bottom of the slide seat, a fixed seat is rotatably installed at the bottom of the connecting rod, a mounting plate is fixedly installed at the bottom of the fixed seat, guide plates are fixedly connected at both ends of the mounting plate, and a pressure roller is rotatably installed between the two groups of the guide plates.

[0007] Furthermore, a motor is fixedly mounted on one side of the first mounting frame, a rotating shaft is coaxially fixedly connected to the driving shaft of the motor, the rotating shaft is rotatably mounted between the two groups of first mounting frames, and the traction roller is fixedly sleeved on the outside of the rotating shaft.

[0008] By adopting the above technical solution, the motor drives the traction roller to rotate and collect the polyethylene bag.

[0009] Furthermore, springs are fixedly mounted on the relatively distant sides of the two groups of slide seats, and the springs are arranged in the slide grooves.

[0010] By adopting the above technical solution, the pressing roller is kept in contact with the curled polyethylene bag outside the traction roller.

[0011] Furthermore, a bidirectional threaded rod is rotatably mounted inside the crossbeam, two sets of sliders are externally threadedly connected to the bidirectional threaded rod, the spring is sleeved outside the bidirectional threaded rod, and one end of the spring away from the slide seat is fixed to one side of the slider.

[0012] By adopting the above technical solution, the spring is fixed between the sliding seat and the sliding block.

[0013] Furthermore, a mounting groove is provided on the crossbeam, a rack is slidably installed in the mounting groove, the bottom of the rack is fixedly connected to the upper end of the mounting plate, a gear is meshed on one side of the rack, and the gear is fixedly connected to one end of the bidirectional threaded rod.

[0014] By adopting the above technical solution, the upward movement of the mounting plate can drive the bidirectional threaded rod to rotate.

[0015] Furthermore, limiting grooves are provided on both sides of the slide groove, and limiting blocks are slidably installed in the limiting grooves, and the limiting blocks are fixedly connected to the sides of the slide block.

[0016] By adopting the above technical solution, the stability of the slider during movement is improved.

[0017] Furthermore, guide rails are provided on the sides of the two groups of the second mounting frames that are close to each other, guide bars are slidably installed in the guide rails, and the guide bars are fixedly installed on the sides of the guide plates.

[0018] By adopting the above technical solution, the stability of the guide plate during movement is improved.

[0019] Furthermore, two groups of third mounting frames are fixedly connected to the base, and the first guide roller and the second guide roller are rotatably mounted between the two groups of third mounting frames. The first guide roller and the second guide roller are both hollow and have ventilation holes on their circumferential surfaces.

[0020] By adopting the above technical solution, the polyethylene bags collected by the traction roller are guided and cooled.

[0021] The beneficial effects of the utility model are as follows: through the crossbeam cooperating with the slide seat, the connecting rod, the fixing seat, the mounting plate, the guide plate and the spring, the guide plate moves upward as the thickness of the polyethylene bag on the traction roller increases, so that the guide plate can always limit the two sides of the collected polyethylene bag, ensuring that the polyethylene bag collection will not have uneven curling, thereby improving the production yield of polyethylene medicinal bags;

[0022] The mounting plate is matched with the rack, gear, bidirectional threaded rod and slider, so that the slide and the spring move simultaneously when the mounting plate moves upward, so as to ensure that the pressure of the pressure roller on the polyethylene bag on the traction roller remains unchanged, and to avoid excessive deformation of the spring due to the increase of the thickness of the polyethylene bag on the traction roller, and excessive elastic force of the spring causing excessive pressure of the pressure roller on the polyethylene bag on the traction roller, thereby damaging the polyethylene bag and causing waste of the polyethylene bag;

[0023] The first guide roller cooperates with the second guide roller and the vent hole to drive the first guide roller and the second guide roller to rotate in the polyethylene bag body. The rotation of the first guide roller and the second guide roller drives the gas to flow inside and outside through the vent hole. The circulating gas cools down the polyethylene bag body in contact with the first guide roller and the second guide roller, thereby preventing the curled polyethylene bag body collected by the traction roller from sticking together, thereby improving the yield rate of the polyethylene bag body 5 production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the traction roller and the pressure roller in the utility model;

[0026] Figure 3 It is a structural schematic diagram of the mounting plate and the guide plate in the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the crossbeam in the utility model;

[0028] Figure 5 It is a schematic diagram of the assembly between the cross beam and the mounting plate in the utility model;

[0029] Figure 6 It is a schematic diagram of the structure between the first guide roller and the second guide roller in the utility model.

[0030] The numbers in the figure are: 1. base; 2. first mounting frame; 3. rotating shaft; 4. traction roller; 5. polyethylene film; 6. motor; 7. second mounting frame; 8. crossbeam; 9. slide seat; 10. connecting rod; 11. fixed seat; 12. mounting plate; 13. guide plate; 14. pressure roller; 15. bidirectional threaded rod; 16. slider; 17. limit block; 18. gear; 19. rack; 20. guide strip; 21. mounting groove; 22. slide groove; 23. limit groove; 24. guide rail; 25. third mounting frame; 26. first guide roller; 27. second guide roller; 28. vent; 29. ​​spring. DETAILED DESCRIPTION

[0031] In the description of the present invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following is combined with Figure 1-6 The utility model is further described.

[0034] In order to solve the problems existing in the background technology, the present application proposes the following technical scheme: it includes a base 1, two groups of first mounting frames 2 are fixedly installed on the base 1, a traction roller 4 is arranged between the two groups of first mounting frames 2, a polyethylene bag body 5 is curled on the outer surface of the traction roller 4, two groups of second mounting frames 7 are fixedly installed on the base 1, a crossbeam 8 is fixedly connected between the two groups of second mounting frames 7, two groups of slide grooves 22 are opened at the bottom of the crossbeam 8, slide seats 9 are slidably installed in both groups of slide grooves 22, a connecting rod 10 is rotatably installed at the bottom of the slide seat 9, a fixed seat 11 is rotatably installed at the bottom of the connecting rod 10, a mounting plate 12 is fixedly installed at the bottom of the fixed seat 11, guide plates 13 are fixedly connected at both ends of the mounting plate 12, and a pressure roller 14 is rotatably installed between the two groups of guide plates 13.

[0035] The traction roller 4 rotates to curl the polyethylene bag 5 fixed on the surface of the traction roller 4 and collect it on the surface of the traction roller 4. The bottom of the pressure roller 14 contacts and squeezes the upper surface of the polyethylene bag 5 on the traction roller 4. The pressure roller 14 keeps the polyethylene bag 5 collected on the traction roller 4 flat and wrinkle-free, thereby improving the quality of the collection of the polyethylene bag 5. The guide plates 13 arranged at both ends of the mounting plate 12 limit the positions of the two sides of the polyethylene bag 5, so that the polyethylene bag 5 will not deviate when curling and collecting on the traction roller 4, thereby avoiding the occurrence of uneven curling when the traction roller 4 rotates to collect the polyethylene bag 5, ensuring the traction effect of the traction roller 4 during the production of the polyethylene bag 5, thereby improving the yield rate of polyethylene medicinal bag production.

[0036] As the traction roller 4 rotates, the thickness of the polyethylene bag 5 collected on the traction roller 4 increases, and the polyethylene bag 5 drives the pressure roller 14 to move upward, and the pressure roller 14 drives the guide plate 13 and the mounting plate 12 to move upward. The guide plate 13 moves upward with the pressure roller 14 so that the guide plate 13 can always limit the two sides of the collected polyethylene bag 5, ensuring that the polyethylene bag 5 will not be collected without uneven curling. The mounting plate 12 pushes the connecting rod 10 to move upward through the fixed seat 11, and the connecting rod 10 drives the two groups of slides 9 to move relatively away from each other. The setting of the fixed seat 11 improves the stability of the guide plate 13 when it moves, and ensures the limiting effect of the guide plate 13 on the two sides of the collected polyethylene bag 5.

[0037] It is further explained that a motor 6 is fixedly mounted on one side of the first mounting frame 2 , a rotating shaft 3 is coaxially fixedly connected to the driving shaft of the motor 6 , the rotating shaft 3 is rotatably mounted between the two sets of first mounting frames 2 , and the traction roller 4 is fixedly sleeved on the outside of the rotating shaft 3 .

[0038] The motor 6 drives the rotating shaft 3 to rotate, and the rotating shaft 3 drives the traction roller 4 to rotate to curl and collect the polyethylene bag 5. The motor 6 provides power for the device.

[0039] It is further explained that springs 29 are fixedly mounted on the relatively distant sides of the two groups of slide seats 9 , and the springs 29 are arranged in the slide grooves 22 .

[0040] Before the curled polyethylene bag 5 is collected, the spring 29 is in a slightly compressed state so that the pressure roller 14 is in contact with the surface of the traction roller 4. When the thickness of the polyethylene bag 5 on the traction roller 4 increases and drives the pressure roller 14 to move upward, the connecting rod 10 drives the two groups of slides 9 to move relatively away from each other. The movement of the slide 9 will further compress the spring 29. The compressed spring 29 will push the pressure roller 14 to move downward through the connecting rod 10 to restore the initial state. The setting of the spring 29 makes the pressure roller 14 always in contact with the surface of the collected polyethylene bag 5 to maintain the pressure on the polyethylene bag 5. At the same time, it is ensured that the guide plate 13 can maintain the restriction effect on both sides of the polyethylene bag 5, thereby improving the stability of the device during use.

[0041] It is further explained that a bidirectional threaded rod 15 is rotatably installed inside the crossbeam 8, and the bidirectional threaded rod 15 is rotatably installed in two groups of slide grooves 22. The external threads of the bidirectional threaded rod 15 are connected to two groups of sliders 16. The spring 29 is sleeved on the outside of the bidirectional threaded rod 15, and the end of the spring 29 away from the slide seat 9 is fixed to one side of the slider 16.

[0042] The spring 29 is fixed between the slide 9 and the slider 16 and is sleeved on the outside of the bidirectional threaded rod 15. The two sets of slides 9 are slidably sleeved on the outside of the bidirectional threaded rod 15. The two sets of slides 9 can slide freely on the outside of the bidirectional threaded rod 15. The slider 16 limits the position of the spring 29, so that when the two sets of slides 9 move away from each other, the slide 9 can compress the spring 29 to ensure that the spring 29 plays a corresponding role.

[0043] It is further explained that a mounting groove 21 is opened on the cross beam 8, a rack 19 is slidably installed in the mounting groove 21, the bottom of the rack 19 is fixedly connected to the upper end of the mounting plate 12, a gear 18 is meshed with one side of the rack 19, and the gear 18 is fixedly connected to one end of the bidirectional threaded rod 15.

[0044] As the thickness of the polyethylene bag 5 on the traction roller 4 increases, the mounting plate 12 moves upward, driving the rack 19 to move upward, the rack 19 moves to drive the gear 18 to rotate, the gear 18 drives the bidirectional threaded rod 15 to rotate, and the bidirectional threaded rod 15 pushes the two groups of sliders 16 to move relatively away, so that the mounting plate 12 moves upward to drive the two groups of slide seats 9 to move relatively away from each other, and the two groups of sliders 16 also move relatively away from each other, keeping the distance between the slide seat 9 and the slider 16 unchanged, so that the elasticity of the spring 29 between the slide seat 9 and the slider 16 remains unchanged, ensuring that the pressure of the polyethylene bag 5 on the traction roller 4 by the pressure roller 14 remains unchanged, avoiding that the deformation of the spring 29 compressed by the mounting plate 12 is too large as the thickness of the polyethylene bag 5 on the traction roller 4 increases, and the elastic force of the spring 29 is too large, resulting in excessive pressure of the pressure roller 14 on the polyethylene bag 5 on the traction roller 4, causing damage to the polyethylene bag 5 and waste of the polyethylene bag 5.

[0045] It is further explained that limiting grooves 23 are provided on both sides of the slide groove 22 , and limiting blocks 17 are slidably installed in the limiting grooves 23 , and the limiting blocks 17 are fixedly connected to the sides of the sliding block 16 .

[0046] The limiting groove 23 cooperates with the limiting block 17 to guide and limit the movement of the slider 16, thereby preventing the slider 16 from rotating when the bidirectional threaded rod 15 rotates, and improving the stability of the slider 16 when moving in the slide groove 22.

[0047] It is further explained that a guide rail 24 is provided on the side of the two groups of second mounting frames 7 close to each other, and a guide bar 20 is slidably installed in the guide rail 24 , and the guide bar 20 is fixedly installed on the side of the guide plate 13 .

[0048] The guide rail 24 limits the guide bar 20 , and further limits the movement of the guide plate 13 , thereby improving the stability of the guide plate 13 when moving in the vertical direction.

[0049] It is further explained that two groups of third mounting frames 25 are fixedly connected to the base 1, and the first guide roller 26 and the second guide roller 27 are rotatably installed between the two groups of third mounting frames 25. The first guide roller 26 and the second guide roller 27 are both hollow and have ventilation holes 28 on the circumferential surface.

[0050] The surface of the polyethylene bag 5 produced by the external blow molding equipment has a certain temperature. The polyethylene bag 5 goes around the outer surface of the first guide roller 26 and the second guide roller 27 and passes through the gap between the first guide roller 26 and the second guide roller 27. The upper and lower surfaces of the polyethylene bag 5 are in contact with the surfaces of the second guide roller 27 and the first guide roller 26 respectively. When the traction roller 4 collects the curled polyethylene bag 5, the polyethylene bag 5 drives the first guide roller 26 and the second guide roller 27 to rotate. The rotation of the first guide roller 26 and the second guide roller 27 drives the gas to flow inside and outside through the vent 28. The circulating gas cools down the polyethylene bag 5 in contact with the first guide roller 26 and the second guide roller 27, thereby avoiding the curled polyethylene bag 5 collected by the traction roller 4 from sticking together, thereby improving the yield rate of the polyethylene bag 5 production.

[0051] Specific reference is made to the following operation: the polyethylene bag 5 produced by the external blow molding equipment is wound around the outer surface of the first guide roller 26 and the second guide roller 27 and passes through the gap between the first guide roller 26 and the second guide roller 27. The upper and lower surfaces of the polyethylene bag 5 are respectively in contact with the surfaces of the second guide roller 27 and the first guide roller 26. Then the polyethylene bag 5 is fixed on the surface of the traction roller 4, and the motor 6 is started. The motor 6 drives the rotating shaft 3 to rotate, and the rotating shaft 3 drives the traction roller 4 to rotate to curl and collect the polyethylene bag 5. As the traction roller 4 rotates, the thickness of the polyethylene bag 5 collected on the traction roller 4 increases, and the polyethylene bag 5 drives the pressing roller 14 to move upward, and the pressing roller 14 drives the guide plate 13 and the mounting plate 12 to move upward. The guide plate 13 moves upward with the pressing roller 14 so that the guide plate 13 can always limit the two sides of the collected polyethylene bag 5 to ensure that the polyethylene bag 5 will not be collected without uneven curling.

[0052] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0053] Although the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A traction device for the production of polyethylene medical bags, characterized in that: The invention comprises a base (1), two groups of first mounting frames (2) are fixedly mounted on the base (1), a traction roller (4) is arranged between the two groups of the first mounting frames (2), a polyethylene bag body (5) is curled on the outer surface of the traction roller (4), two groups of second mounting frames (7) are fixedly mounted on the base (1), a crossbeam (8) is connected between the two groups of the second mounting frames (7), two groups of slide grooves (22) are provided at the bottom of the crossbeam (8), a slide seat (9) is slidably mounted in both groups of the slide grooves (22), a connecting rod (10) is rotatably mounted at the bottom of the slide seat (9), a fixed seat (11) is rotatably mounted at the bottom of the connecting rod (10), a mounting plate (12) is fixedly mounted at the bottom of the fixed seat (11), guide plates (13) are fixedly connected to both ends of the mounting plate (12), and a pressure roller (14) is rotatably mounted between the two groups of the guide plates (13).

2. The traction device for producing polyethylene medical bags according to claim 1, characterized in that: A motor (6) is fixedly mounted on one side of the first mounting frame (2); a rotating shaft (3) is coaxially fixedly connected to the driving shaft of the motor (6); the rotating shaft (3) is rotatably mounted between the two groups of first mounting frames (2); and the traction roller (4) is fixedly sleeved on the outside of the rotating shaft (3).

3. The traction device for producing polyethylene medical bags according to claim 2, characterized in that: A spring (29) is fixedly mounted on the relatively distant sides of the two groups of slide seats (9), and the spring (29) is arranged in the slide groove (22).

4. The traction device for producing polyethylene medical bags according to claim 3, characterized in that: A bidirectional threaded rod (15) is rotatably mounted inside the crossbeam (8), and two sets of sliders (16) are threadedly connected to the outside of the bidirectional threaded rod (15). The spring (29) is sleeved on the outside of the bidirectional threaded rod (15), and one end of the spring (29) away from the slide seat (9) is fixed to one side of the slider (16).

5. The traction device for producing polyethylene medical bags according to claim 4, characterized in that: The cross beam (8) is provided with a mounting groove (21), a rack (19) is slidably mounted in the mounting groove (21), the bottom of the rack (19) is fixedly connected to the upper end of the mounting plate (12), one side of the rack (19) is meshed with a gear (18), and the gear (18) is fixedly connected to one end of the bidirectional threaded rod (15).

6. The traction device for producing polyethylene medical bags according to claim 5, characterized in that: Limiting grooves (23) are provided on both sides of the slide groove (22), and limiting blocks (17) are slidably installed in the limiting grooves (23), and the limiting blocks (17) are fixedly connected to the side surfaces of the sliding block (16).

7. The traction device for producing polyethylene medical bags according to claim 6, characterized in that: A guide rail (24) is provided on the side where the two groups of the second mounting frames (7) are close to each other. A guide bar (20) is slidably installed in the guide rail (24), and the guide bar (20) is fixedly installed on the side of the guide plate (13).

8. The traction device for producing polyethylene medical bags according to claim 7, characterized in that: Two groups of third mounting frames (25) are fixedly connected to the base (1), and a first guide roller (26) and a second guide roller (27) are rotatably mounted between the two groups of third mounting frames (25). The first guide roller (26) and the second guide roller (27) are both hollow and have ventilation holes (28) on their circumferential surfaces.

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