PVA (Polyvinyl Alcohol) film rolling surface flatness detection device

Abstract

The utility model relates to a PVA film rolling surface flatness detection device comprising a pedestal, the front side of the top wall of the pedestal is fixedly connected with a shaft seat, the shaft seat is rotatably connected with a rotating shaft, two ends of the rotating shaft are fixedly connected with limiting discs, the top wall of the pedestal is fixedly connected with a distance adjusting pedestal, and the top wall of the inner cavity of the distance adjusting pedestal is fixedly connected with a longitudinal track. A longitudinal lead screw mechanism is fixedly connected to the top wall of an inner cavity of the distance adjusting base, a longitudinal rail is slidably connected with a longitudinal sliding seat, a lead screw nut of the longitudinal lead screw mechanism is fixedly connected with the longitudinal sliding seat, a transverse rail is arranged in the longitudinal sliding seat and slidably connected with a transverse sliding seat, and two synchronous wheels are arranged in the longitudinal sliding seat. A transverse synchronous belt is wound around the two synchronous wheels, one belt section of the transverse synchronous belt is fixedly connected with the transverse sliding seat, a longitudinal air pressure spring is fixedly connected to the top wall of the transverse sliding seat, and a piston rod is arranged on the longitudinal air pressure spring. The film rolling device can detect whether bubbles exist in the film rolling process or not in real time, and therefore film deformation caused by the bubbles can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of PVA film production, in particular to a PVA film roll surface flatness detection device. Background Art

[0002] PVA film is polyvinyl alcohol film. PVA is the only vinyl polymer that can be used by bacteria as a carbon source and energy source. It is a biodegradable polymer material that can be mass-produced by non-petroleum routes at a low price. It has outstanding oil resistance, solvent resistance and gas barrier properties, and has unique advantages in food and drug packaging.

[0003] During the production and rolling process of PVA film, care must be taken to avoid mixing air between the films to prevent bubbles from forming between the films. Once bubbles are formed between the films, the bubbles will become bulges during subsequent transportation and storage, thereby supporting the film at that location, causing deformation of the film at that location, affecting the dimensional accuracy of the film and product quality. Utility Model Content

[0004] The utility model aims to provide a PVA film roll surface flatness detection device, which can detect in real time whether there are bubbles in the film rolling process, thereby avoiding film deformation caused by bubbles.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A PVA film roll surface flatness detection device comprises a base, a shaft seat is fixedly connected to the front side of the top wall of the base, the shaft seat is rotatably connected to a rotating shaft, both ends of the rotating shaft are fixedly connected to limit disks, a distance-adjusting base is fixedly connected to the top wall of the base, a longitudinal track is fixedly connected to the top wall of the inner cavity of the distance-adjusting base, a longitudinal lead screw mechanism is fixedly connected to the top wall of the inner cavity of the distance-adjusting base, the longitudinal track is slidably connected to a longitudinal slide seat, a lead screw nut of the longitudinal lead screw mechanism is fixedly connected to the longitudinal slide seat, a transverse track is arranged in the longitudinal slide seat, the transverse track is slidably connected to the transverse slide seat, two synchronous wheels are arranged in the longitudinal slide seat, and a transverse line is wound around the two synchronous wheels A belt section of the horizontal synchronous belt and the horizontal synchronous belt is fixedly connected to the horizontal slide seat, the top wall of the horizontal slide seat is fixedly connected with a longitudinal gas pressure spring, the longitudinal gas pressure spring is provided with a piston rod, the piston rod is fixedly connected with a fixed contact, the piston rod is fixedly connected to the side plate, the side plate is fixedly connected with a longitudinal slide rail, the longitudinal slide rail is slidably connected with a touch slider, the side plate is fixedly connected with a limit plate, the limit plate is arranged at the rear of the touch slider, the rear side of the touch slider is fixedly connected with a mounting rod, the mounting rod is penetrated with a reset spring, the two ends of the reset spring respectively abut against the limit plate and the touch slider, the side plate is fixedly connected with a limit block, the limit block is arranged at the front side of the touch slider, and the touch slider is fixedly connected with a moving contact.

[0007] Specifically, two clearance grooves are provided on the top wall of the distance-adjusting base. A U-shaped connecting seat is fixedly connected to the bottom wall of the longitudinal sliding seat. The two vertical plates of the U-shaped connecting seat are fixedly connected to the bottom wall of the longitudinal sliding seat. The two vertical plates of the U-shaped connecting seat pass through the two clearance grooves. A longitudinal sliding block is fixedly connected to the upper wall of the cross plate of the U-shaped connecting seat. The longitudinal sliding block is slidably engaged with the longitudinal track. A gap is left between the bottom wall of the longitudinal sliding seat and the top wall of the distance-adjusting base.

[0008] Specifically, a transverse sliding block is fixedly connected to the bottom wall of the transverse sliding seat. The transverse sliding block is slidably connected to the transverse track.

[0009] Specifically, two transverse limiting seats are provided on the bottom wall of the inner cavity of the longitudinal sliding seat. The two transverse limiting seats are respectively fixedly connected to both ends of the transverse track.

[0010] Specifically, a triangular connecting plate is fixedly connected to the piston rod of the longitudinal pneumatic spring. The side of the triangular connecting plate is fixedly connected to the side plate.

[0011] Specifically, a photoelectric sensor is fixedly connected to the side plate. The photoelectric sensor is provided with a sensing groove. A sensing piece is fixedly connected to the sensing slider. The sensing piece is located in front of the front side of the sensing groove.

[0012] Specifically, arc surfaces are provided at the head ends of the moving contact and the fixed contact.

[0013] Specifically, when the return spring is in the return state, the head end of the moving contact is flush with the head end of the fixed contact in the transverse direction.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] During the process of the PVA film being wound onto the paper tube, the transverse synchronous belt drives the transverse sliding seat to move back and forth horizontally, thereby driving the fixed contact and the moving contact to sweep across the PVA film horizontally back and forth. During the process of the fixed contact sweeping across the PVA film, the pre-pressure of the longitudinal pneumatic spring keeps the fixed contact in contact with the PVA film and makes the fixed contact float relative to the longitudinal pneumatic spring, thereby preventing the fixed contact from scratching the PVA film.

[0016] During the winding process of each section of the PVA film, due to the equipment not being set ideally or other reasons, a small amount of gas may be mixed between the films, thus forming a bubble bulge at the film winding side. When the moving contact sweeps across the bubble bulge, the moving contact will be pushed backward, thereby driving the sensing slider, the sensing piece and the mounting rod to move backward together (compressing the return spring), so that the sensing piece enters the sensing groove, thereby triggering an alarm to remind the operator to adjust the equipment. In this way, bubbles can be detected and avoided in real time during the PVA film winding process, thereby preventing the bubble bulge from deforming the film, and thus preventing the film size accuracy and product quality from being affected.

[0017] When the bubble protrusion is not touched, the reset spring resets to keep the sensing slider against the limit block. At this time, the moving contact is flush with the fixed contact in the horizontal direction, and the sensing piece is at the front end of the notch of the sensing groove.

[0018] When the PVA film is rolled into the paper roll, if the tension on both sides of the PVA film is different, the looser side will not be tightened when rolled in, which will cause the diameter of the roll on that side to become larger and larger, resulting in inconsistent diameters of the roll, with one end larger and the other smaller. To prevent the above situation, the photoelectric sensor can be set in advance. If the difference in the beating value of the moving contact scanning the two ends of the roll exceeds the set value, the photoelectric sensor will alarm, indicating that the tension on both sides of the PVA film is different. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a three-dimensional view of a device for detecting the flatness of a PVA film roll;

[0021] Figure 2 It is a partial view of the device for detecting the flatness of the PVA film roll surface;

[0022] Figure 3 It is a partial view of the device for detecting the flatness of the PVA film roll surface;

[0023] Figure 4 A view of the touch slider and related structures;

[0024] Figure 5 Another view of the touch slider and related structure;

[0025] Figure 6 A partial view of a device for detecting the flatness of a PVA film roll.

[0026] In the figure:

[0027] 1. Base; 11. Shaft seat; 12. Rotating shaft; 13. Limiting plate;

[0028] 2. Adjustable distance base; 21. Longitudinal track; 22. Longitudinal screw mechanism; 23. Avoidance groove;

[0029] 3. Longitudinal slide; 31. Horizontal track; 32. Synchronous wheel; 33. Horizontal synchronous belt; 34. U-shaped connecting seat; 35. Horizontal limit seat;

[0030] 4. Horizontal slide; 41. Longitudinal gas pressure spring; 42. Fixed contact; 43. Triangular connecting plate;

[0031] 5. Side panel; 51. Longitudinal slide rail; 52. Touch slider; 521. Touch sheet; 522. Mounting plate; 53. Limit plate; 54. Mounting rod; 55. Return spring; 56. Limit block; 57. Moving contact; 58. Photoelectric sensor; 581. Touch groove. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] See Figures 1 to 6 A PVA film roll surface flatness detection device comprises a base 1, a shaft seat 11 is fixedly connected to the front side of the top wall of the base 1, the shaft seat 11 is rotatably connected to a rotating shaft 12, and both ends of the rotating shaft 12 are fixedly connected to limit disks 13.

[0034] The top wall of the base 1 is fixedly connected with a distance-adjusting base 2, and the top wall of the inner cavity of the distance-adjusting base 2 is fixedly connected with a longitudinal track 21. The top wall of the inner cavity of the distance-adjusting base 2 is fixedly connected with a longitudinal screw mechanism 22, and the longitudinal track 21 is slidably connected with a longitudinal slide 3. The screw nut of the longitudinal screw mechanism 22 is fixedly connected with the longitudinal slide 3.

[0035] A transverse track 31 is provided in the longitudinal slide 3, and the transverse track 31 is slidably connected to the transverse slide 4. Two synchronous wheels 32 are provided in the longitudinal slide 3, and a transverse synchronous belt 33 is wound around the two synchronous wheels 32, and a belt section of the transverse synchronous belt 33 is fixedly connected to the transverse slide 4.

[0036] The top wall of the transverse slide 4 is fixedly connected with a longitudinal gas pressure spring 41, and the longitudinal gas pressure spring 41 is provided with a piston rod, and the piston rod is fixedly connected with a fixed contact 42. The piston rod is fixedly connected with the side plate 5, and the side plate 5 is fixedly connected with a longitudinal slide rail 51, and the longitudinal slide rail 51 is slidably connected with a touch slider 52. The side plate 5 is fixedly connected with a limit plate 53, and the limit plate 53 is arranged behind the touch slider 52. The rear side of the touch slider 52 is fixedly connected with a mounting rod 54, and the mounting rod 54 is penetrated with a return spring 55, and the two ends of the return spring 55 are respectively against the limit plate 53 and the touch slider 52. The side plate 5 is fixedly connected with a limit block 56, and the limit block 56 is arranged on the front side of the touch slider 52. The touch slider 52 is fixedly connected with a mounting plate 522, and the mounting plate 522 is fixedly connected with a moving contact 57.

[0037] Specifically, two clearance grooves 23 are provided on the top wall of the distance-adjusting base 2. A U-shaped connecting seat 34 is fixedly connected to the bottom wall of the longitudinal sliding seat 3. The two vertical plates of the U-shaped connecting seat 34 are fixedly connected to the bottom wall of the longitudinal sliding seat 3, and the two vertical plates of the U-shaped connecting seat 34 pass through the two clearance grooves 23. A longitudinal sliding block is fixedly connected to the upper wall of the cross plate of the U-shaped connecting seat 34, and the longitudinal sliding block is slidably matched with the longitudinal track 21. A gap is left between the bottom wall of the longitudinal sliding seat 3 and the top wall of the distance-adjusting base 2 ( Figure 1 at A in).

[0038] Specifically, a transverse sliding block is fixedly connected to the bottom wall of the transverse sliding seat 4, and the transverse sliding block is slidably connected to the transverse track 31.

[0039] Specifically, two transverse limit seats 35 are provided on the bottom wall of the inner cavity of the longitudinal sliding seat 3, and the two transverse limit seats 35 are respectively fixedly connected to both ends of the transverse track 31.

[0040] Specifically, a triangular connecting plate 43 is fixedly connected to the piston rod of the longitudinal air spring 41, and the side of the triangular connecting plate 43 is fixedly connected to the side plate 5.

[0041] Specifically, a photoelectric sensor 58 is fixedly connected to the side plate 5. The photoelectric sensor 58 is provided with a sensing groove 581, and a sensing piece 521 is fixedly connected to the mounting plate 522. The sensing piece 521 is located in front of the front side of the sensing groove 581.

[0042] Specifically, arc surfaces are provided at the head ends of both the moving contact 57 and the fixed contact 42.

[0043] Specifically, when the return spring 55 is in the return state, the head end of the moving contact 57 and the head end of the fixed contact 42 are flush horizontally (as Figure 4 shown).

[0044] The working principle of the PVA film surface flatness detection device of the present utility model is as follows:

[0045] A paper tube (not shown in the figure) is sleeved on the rotating shaft 12, and the two limiting discs 13 jointly clamp the paper tube. The rotating shaft 12 rotates under the drive of a motor (not shown in the figure), thereby driving the paper tube to rotate. The PVA film produced by the film-making equipment in the previous process is wound on the paper tube, and the paper tube rotates with the rotating shaft 12, thereby winding the produced PVA film into a roll.

[0046] During the rotation of the paper tube, the longitudinal lead screw mechanism 22 controls the longitudinal position of the longitudinal sliding seat 3 in real time, so that the fixed contact 42 and the moving contact 57 are kept in contact with the film surface on the winding side of the PVA film roll. The fixed contact 42 is provided on the piston rod of the longitudinal air spring 41, so that the fixed contact 42 and the longitudinal air spring 41 are in a floating connection, playing a certain buffering role and avoiding scratching the PVA film by the fixed contact 42.

[0047] When the PVA film is rolled into the paper roll, the transverse synchronous belt 33 drives the transverse slide 4 to move back and forth in the transverse direction, thereby driving the fixed contact 42 and the movable contact 57 to sweep the PVA film back and forth in the transverse direction. When the fixed contact 42 sweeps the PVA film, the pre-pressure of the longitudinal gas pressure spring 41 keeps the fixed contact 42 close to the PVA film and makes the fixed contact 42 float relative to the longitudinal gas pressure spring 41, thereby preventing the fixed contact 42 from scratching the PVA film.

[0048] During the process of rolling up each section of PVA film, due to the equipment setting not being ideal or other reasons, a small amount of gas may be mixed between the films, thereby forming a bubble bulge on the film rolling side. When the moving contact 57 sweeps over the bubble bulge, the moving contact 57 will be pushed back, thereby driving the sensing slider 52, the sensing sheet 521 and the mounting rod 54 to move back together (compressing the reset spring 55), so that the sensing sheet 521 enters the sensing groove 581, thereby triggering an alarm to remind the operator to adjust the equipment. In this way, the formation of bubbles in the process of rolling up the PVA film can be discovered and avoided in real time, thereby preventing the bubble bulge from deforming the film, thereby avoiding affecting the dimensional accuracy of the film and the product quality.

[0049] When the bubble bulge is not touched, the reset spring 55 is reset to keep the touch slider 52 against the limit block 56. At this time, the moving contact 57 is flush with the fixed contact 42 in the horizontal direction, and the touch sheet 521 is at the front end of the notch of the touch groove 581 (refer to Figure 4 ).

[0050] During the process of rolling the PVA film into the paper roll, if the tension levels of the two sides of the PVA film are different, the looser side will not be tightened when rolled in, which will cause the diameter of the roll on that side to become larger and larger, resulting in inconsistent diameters of the roll, with one end larger and the other smaller. To prevent the above situation, the photoelectric sensor 58 can be set in advance. If the difference in the jump values ​​of the moving contact 57 scanning the two ends of the roll exceeds the set value, the photoelectric sensor 58 will alarm, indicating that the tension levels of the two sides of the PVA film are different.

[0051] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A PVA film roll surface flatness detection device, characterized in that: It includes a base. A shaft seat is fixedly connected to the front side of the top wall of the base. A rotating shaft is rotatably connected to the shaft seat. Limiting disks are fixedly connected to both ends of the rotating shaft. A distance-adjusting base is fixedly connected to the top wall of the base. A longitudinal track is fixedly connected to the top wall of the inner cavity of the distance-adjusting base. A longitudinal lead screw mechanism is fixedly connected to the top wall of the inner cavity of the distance-adjusting base. A longitudinal sliding seat is slidably connected to the longitudinal track. The lead screw nut of the longitudinal lead screw mechanism is fixedly connected to the longitudinal sliding seat. A transverse track is provided in the longitudinal sliding seat. A transverse sliding seat is slidably connected to the transverse track. Two synchronous pulleys are provided in the longitudinal sliding seat. A transverse synchronous belt is wound around the two synchronous pulleys. A belt section of the transverse synchronous belt is fixedly connected to the transverse sliding seat. A longitudinal pneumatic spring is fixedly connected to the top wall of the transverse sliding seat. The longitudinal pneumatic spring is provided with a piston rod. The piston rod is fixedly connected with a fixed contact. The piston rod is fixedly connected with a side plate. The side plate is fixedly connected with a longitudinal slide rail. A sensing slider is slidably connected to the longitudinal slide rail. A limiting plate is fixedly connected to the side plate and is arranged behind the sensing slider. An installation rod is fixedly connected to the rear side of the sensing slider. A return spring is arranged through the installation rod. The two ends of the return spring respectively abut against the limiting plate and the sensing slider. A limiting block is fixedly connected to the side plate and is arranged in front of the sensing slider. A moving contact is fixedly connected to the sensing slider.

2. The PVA film roll surface flatness detection device according to claim 1, characterized in that: Two clearance grooves are provided on the top wall of the distance-adjusting base. A U-shaped connecting seat is fixedly connected to the bottom wall of the longitudinal sliding seat. The two vertical plates of the U-shaped connecting seat are fixedly connected to the bottom wall of the longitudinal sliding seat. The two vertical plates of the U-shaped connecting seat pass through the two clearance grooves. A longitudinal sliding block is fixedly connected to the upper wall of the transverse plate of the U-shaped connecting seat. The longitudinal sliding block is slidably matched with the longitudinal track. A gap is left between the bottom wall of the longitudinal sliding seat and the top wall of the distance-adjusting base.

3. The PVA film roll surface flatness detection device according to claim 1, characterized in that: A transverse sliding block is fixedly connected to the bottom wall of the transverse sliding seat. The transverse sliding block is slidably connected to the transverse track.

4. The PVA film roll surface flatness detection device according to claim 1, characterized in that: Two transverse limiting seats are provided on the bottom wall of the inner cavity of the longitudinal sliding seat, and the two transverse limiting seats are respectively fixedly connected to both ends of the transverse track.

5. The PVA film roll surface flatness detection device according to claim 1, characterized in that: The piston rod of the longitudinal pneumatic spring is fixedly connected with a triangular connecting plate, and the side of the triangular connecting plate is fixedly connected with the side plate.

6. The PVA film roll surface flatness detection device according to claim 1, characterized in that: A photoelectric sensor is fixedly connected to the side plate. The photoelectric sensor is provided with a sensing groove. A sensing piece is fixedly connected to the sensing slider, and the sensing piece is located in front of the front end of the sensing groove.

7. The PVA film roll surface flatness detection device according to claim 1, characterized in that: Arc surfaces are provided at the head ends of both the moving contact and the fixed contact.

8. The PVA film roll surface flatness detection device according to claim 1, characterized in that: When the return spring is in the reset state, the head ends of the moving contact and the fixed contact are flush with each other transversely.

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