A protective film slitting machine

Abstract

The present invention relates to the field of protective film slitting equipment, and specifically discloses a protective film slitting machine, which is characterized by comprising: a mother roll retracting device; a slitting and retracting device; a tensioning and adjusting roller device; a roller conveying device; a transverse slitting device; and a longitudinal slitting device. The present invention uses a slitting and retracting device. When a large-sized protective film deviates from the pre-selected dividing line of the protective film due to the accumulated errors in the slitting process, the PLC control and the tensioning and rotating drive motor and the servo drive motor work together to complement each other to retract and fine-tune the position of the protective film to be adjusted for cutting. Even if the deviation distance is not large, there is no need to pull out the large piece of protective film with the slitting deviation by hand. Only a small section of the misaligned deviation needs to be cut, which greatly avoids the waste of the entire sheet.

Description

Technical Field

[0001] The invention relates to the field of protective film slitting equipment, in particular to a protective film slitting machine. Background Art

[0002] The types and application scenarios of protective films (PVC films) are relatively wide. In actual use, they need to be cut and subsequently packaged according to actual size specifications.

[0003] Existing slitting machines often need to slit large-sized protective film mother rolls. Due to structural defects, the mother roll retracting and unwinding device cannot achieve fine-tuning operations well. When the large-sized protective film deviates from the pre-selected dividing line of the protective film due to the accumulated errors in the slitting process, even if the deviation distance is not large, the large piece of protective film with slitting deviation needs to be pulled out and treated as scrap material. If this happens, the waste of protective film raw materials will become more serious.

[0004] After the protective film mother roll is placed on the mother roll retracting and unwinding device, in order to ensure the accuracy of transportation, it is best not to have obvious looseness and shaking. However, the existing protective film mother roll has a certain flexibility, so it is easy to have looseness and shaking and other unfavorable situations during transportation.

[0005] The horizontal and vertical cutting structures of the slitting equipment of the existing protective film slitting equipment only use a circular blade seat, which is inconvenient to adjust and lacks a convenient adjustment reference structure. Moreover, after long-term continuous operation, the circular blade seat becomes slightly blunt due to the blade edge, which makes it easier for the protective film (PVC film) with a smooth surface to slip or incomplete cutting, which has a certain adverse effect on the slitting process of the protective film, and therefore there is a lot of room for improvement. Summary of the invention

[0006] In order to overcome the deficiencies in the background technology, the object of the present invention is to provide a protective film slitting machine.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A protective film slitting machine, the main body of which comprises:

[0009] A mother roll reeling device, the mother roll reeling device comprising a mother roll reeling shaft for accommodating a protective film reel drum, the mother roll reeling shaft having an elastic pressing member extending out of the mother roll reeling shaft body, the elastic pressing member being able to closely contact and press against the inner wall surface of the protective film reel drum;

[0010] A slitting and retracting device, the slitting and retracting device comprising a driving part connected to the mother roll reeling shaft via a pulley, a sprocket or a gear, and used to drive the mother roll reeling shaft to rotate clockwise or counterclockwise;

[0011] A tensioning and adjusting roller pressing device, the tensioning and adjusting roller pressing device comprising a plurality of tensioning and fixing rollers arranged above the parent roll reeling and unwinding device, and a tensioning and adjusting roller arranged on one side of the tensioning and fixing rollers and connected to an adjusting handle;

[0012] A roller conveying device, the roller conveying device comprising a plurality of roller wheel groups arranged on one side of the tensioning and adjusting roller pressing device in a feeding direction, and a retractable glue coating top block is provided below the roller wheel group;

[0013] A transverse slitting device, the transverse slitting device comprising a telescopic pressing roller and a plurality of slitting knife seats correspondingly arranged below the telescopic pressing roller for transversely slitting the protective film extruded and conveyed by the roller pressing wheel group;

[0014] A longitudinal slitting device, comprising a sliding slitting seat arranged at the end of the feeding direction of the roller wheel group, and a slitting seat driving block driving the sliding slitting seat to move back and forth, the sliding slitting seat is provided with a longitudinal cutting blade, and the sliding slitting seat is used to longitudinally cut the protective film extruded and conveyed by the roller wheel group.

[0015] Preferably, a winding roller device is also included, which includes a plurality of winding rollers arranged at the ends of the longitudinal slitting device in the feeding direction, and the winding rollers are used to wind up the protective film after being cut by the transverse slitting device and the longitudinal slitting device.

[0016] Preferably, the elastic pressure member includes a support frame embedded in the inner cavity of the mother roll reel-winding shaft, the support frame is provided with an installation groove, the installation groove is provided with an elastic member, and both ends of the elastic member are provided with pressure blocks, and the ends of the pressure blocks extend out of the shaft body of the mother roll reel-winding shaft.

[0017] Preferably, the top pressure block is in the shape of an elongated strip as a whole, the upper end of the top pressure block has an inverted arc corner, and both sides of the upper end are provided with gently sloping steps.

[0018] Preferably, the driving unit is a servo drive motor.

[0019] Preferably, the tensioning and fixing pressure roller is connected to a tensioning and rotating driving motor which provides driving rotational force.

[0020] Preferably, the telescopic glue coating top block includes a glue coating swing plate that can contact the bottom surface of the protective film, one end of the glue coating swing plate is connected by a rotating shaft to form a fulcrum for the glue coating swing plate to swing up and down, and the other end of the glue coating swing plate is connected to a glue coating plate pushing cylinder that drives the glue coating swing plate to swing back and forth up and down.

[0021] Preferably, the slitting knife seat comprises a sliding guide groove with scale markings on the surface, the sliding guide groove is slidably connected with a connecting plate, a slitting knife seat motor is provided at the end of the connecting plate, and the slitting knife seat motor is connected to a disc cross-cutting blade.

[0022] Preferably, a cutter mounting seat is provided at the end of the connecting plate, and a cross-cutting blade is connected to the cutter mounting seat.

[0023] Preferably, the cross-cutting blade and the longitudinal-cutting blade are two obliquely symmetrically arranged square blades, the cutting edges of the cross-cutting blade and the longitudinal-cutting blade face outwards, and the blade tips stand upright and face upwards.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] Through the slitting and retracting device, when the slitting size of a large-sized protective film deviates from the pre-selected dividing line of the protective film due to the accumulated errors during the slitting process, the PLC control and the combined action of the tensioning and rotating drive motor and the servo drive motor complement each other to make a fine adjustment to the position of the protective film to be cut. Even if the deviation distance is not large, there is no need to manually pull out the large piece of protective film where the slitting deviation occurs. Only the small section of the misaligned deviation needs to be cut, which greatly avoids the waste of the entire sheet.

[0026] The elastic pressing piece of the mother roll reel can effectively overcome the problem of looseness and shaking of the protective film mother roll with a certain flexibility, which is conducive to ensuring the accuracy of transportation. Since the pressing block is set as a long strip as a whole, it not only enhances the contact and tightening effect, but also the pressing blocks are respectively set at the upper and lower ends of the elastic member, so they can achieve bidirectional compression with each other. With the help of the gently sloping step setting, efficient installation and disassembly can be achieved without hindering the placement of the protective film mother roll. The upper end of the pressing block can avoid affecting the inner wall surface of the protective film winding barrel by setting an arc angle. The overall structure of the mother roll reel is also simple and reliable, easy to use, and has obvious effect in overcoming the problem of looseness and shaking of the protective film mother roll.

[0027] Several slitting knife seats of the transverse slitting device can very efficiently locate the required transverse cutting position through sliding guide grooves with scale markings on the surface. In terms of the slitting structure, a disc transverse cutting blade is connected to the slitting knife seat motor, and the protective film is cut by high-speed rotation in conjunction with the disc transverse cutting blade. Even if the cutting edge of the disc transverse cutting blade becomes blunt, it can be compensated to a certain extent through high-speed rotation.

[0028] The sliding slitting seat of the longitudinal slitting device is driven by the slitting seat driving block to efficiently and quickly drive the longitudinal slitting blade to move, so that the protective film after cross-cutting is further longitudinally cut, thereby completing the forming and striping work of the protective film.

[0029] Through the structural setting of the vertical cutting of the cross-cutting blade and the longitudinal cutting blade, the protective film can be cut very sharply without a rotary drive. Even if the cutting edge becomes slightly blunt, it is not easy to cause problems such as slipping or incomplete cutting for the protective film (PVC film) with a smooth surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Is: a schematic diagram of the structure of the present invention in the main view direction;

[0031] Figure 2 Is: a schematic structural diagram of the side view direction of the present invention;

[0032] Figure 3 The structure of the mother roll reel shaft of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 4 The structure of the mother roll reel shaft of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 5 1 is a schematic diagram of the structure of the elastic top pressure piece of the present invention;

[0035] Figure 6 1 is a schematic diagram of the structure of the telescopic roller part of the present invention;

[0036] Figure 7 1 is a schematic diagram of the structure of the slitting knife holder part of the present invention;

[0037] Figure 8 1 is a schematic diagram of the structure of another embodiment of the slitting knife seat part of the present invention;

[0038] Fig. 9 is: a schematic structural diagram of the telescopic glue-coated top block portion of the present invention;

[0039] Fig.10 is: a structural schematic diagram of the sliding cutting seat part of the present invention in the main view direction;

[0040] Fig.11 is: a schematic structural diagram of the side view of the sliding cutting seat of the present invention;

[0041] Fig.12 1 is a schematic diagram of the protective film cutting process of the present invention;

[0042] Fig.13Schematic diagram of the state where the cutting size of the protective film of the present invention deviates from the cutting line of the size Figure 1 ;

[0043] Fig.14 Schematic diagram of the state where the cutting size of the protective film of the present invention deviates from the cutting line of the size Figure 2 .

[0044] In the figure: 1. Mother roll rewinding device 2. Mother roll rewinding shaft 3. Elastic top pressure piece 4. Slitting and retracting device 5. Driving unit 6. Tensioning and adjusting roller pressure device 7. Tensioning and fixing pressure roller 8. Tensioning and adjusting pressure roller 9. Roller conveying device 10. Roller pressure wheel group 11. Telescopic gluing top block 12. Transverse slitting device 13. Telescopic pressure roller 14. Slitting knife seat 15. Longitudinal slitting device 16. Sliding slitting seat 17. Slitting seat driving block 18. Longitudinal slitting blade 19. Winding roller shaft device 20. Winding roller shaft 21. Protective film reel 22. Support frame 23. Mounting groove 24. Elastic piece 25. Top pressure block 26. Tensioning and rotating driving motor 27. Gluing swing plate 28. Gluing plate pushing cylinder 29. Scale mark 30. Sliding guide groove 31. Connecting plate 32. Slitting knife seat motor 33. Disc cross-cutting blade 34. Cross-cutting blade 35. Protective film 36. Cutter mounting seat. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figure 1-14 As shown, a protective film slitting machine, the main body includes:

[0047] The mother roll winding and unwinding device 1 includes a mother roll winding and unwinding shaft 2 for accommodating a protective film winding drum 21, and the mother roll winding and unwinding shaft 2 has an elastic pressing piece 3 which can extend out of the shaft body of the mother roll winding and unwinding shaft 2, and the elastic pressing piece 3 can be in close contact with and pressed against the inner wall surface of the protective film winding drum 21.

[0048] The slitting and retracting device 4 includes a driving part 5 connected to the mother roll reel-in / out shaft 2 via a pulley, a sprocket or a gear, and used to drive the mother roll reel-in / out shaft 2 to rotate clockwise or counterclockwise;

[0049] A tensioning and adjusting roller pressing device 6, the tensioning and adjusting roller pressing device 6 comprises a plurality of tensioning and fixing rollers 7 arranged above the parent roll rewinding and unwinding device 1, and a tensioning and adjusting roller 8 arranged on one side of the tensioning and fixing rollers 7 and connected to an adjusting handle;

[0050] A roller conveying device 9, the roller conveying device 9 comprises a plurality of roller wheel groups 10 arranged on one side of the feeding direction of the tensioning and adjusting roller device 6 in an upper and lower clamping manner, and a retractable glue coating top block 11 is arranged below the roller wheel group 10;

[0051] A transverse slitting device 12, the transverse slitting device 12 comprises a telescopic pressing roller 13 and a plurality of slitting knife seats 14 correspondingly arranged below the telescopic pressing roller 13 for transversely slitting the protective film 35 extruded and conveyed by the roller pressing wheel group 10;

[0052] The longitudinal slitting device 15 includes a sliding slitting seat 16 arranged at the end of the roller pressing wheel group 10 in the feeding direction, and a slitting seat driving block 17 driving the sliding slitting seat 16 to move back and forth. The sliding slitting seat 16 is provided with a longitudinal cutting blade 18, and the sliding slitting seat 16 is used to longitudinally slit the protective film 35 extruded and conveyed by the roller pressing wheel group 10. The slitting seat driving block 17 is a cylinder or a hydraulic cylinder.

[0053] As an embodiment, the driving part 5 is a servo drive motor. The servo drive motor can control the torque very accurately, and the position of the retracted slitting can be finely adjusted. The tensioning fixed pressure roller 7 is connected to a tensioning rotating drive motor 26 that provides driving rotation force.

[0054] Through the slitting and retracting device 4, when the slitting size of the large-sized protective film 35 deviates from the pre-selected dividing line of the protective film 35 due to the accumulated errors in the slitting process, the PLC control and the tensioning and rotating drive motor 26 and the servo drive motor of the drive unit 5 work together to make a fine adjustment to the position of the protective film 35 to be adjusted for cutting. Even if the deviation distance is not large, there is no need to manually pull out the large piece of protective film 35 that has been deviated from the slitting, and only a small section of the misaligned deviation needs to be cut, which greatly avoids the waste of the whole sheet.

[0055] As an embodiment, it also includes a winding roller device 19, which includes a plurality of winding rollers 20 arranged at the end of the longitudinal slitting device in the feeding direction, and the winding rollers 20 are used to wind up the protective film 35 cut by the transverse slitting device 12 and the longitudinal slitting device 15. The winding rollers 20 obtain driving force by connecting to a driving motor.

[0056] The elastic pressing member 3 includes a support frame 22 embedded in the inner cavity of the mother roll reeling shaft 2, a mounting groove 23 is provided inside the support frame 22, an elastic member 24 is provided in the mounting groove 23, and a pressing block 25 is provided at both ends of the elastic member 24, and the end of the pressing block 25 extends out of the shaft body of the mother roll reeling shaft 2. The elastic member 24 is a spring or a compression spring.

[0057] The top pressing block 25 is in the shape of a long strip as a whole, and the upper end of the top pressing block 25 has an arc corner, and both sides of the upper end are provided with gently sloping steps.

[0058] The elastic pressing piece 3 of the mother roll reel 1 can effectively overcome the problem of looseness and shaking of the protective film 35 mother roll with a certain flexibility, which is conducive to ensuring the accuracy of transportation. Since the pressing block 25 is set as a long strip as a whole, it not only enhances the contact and tightening effect, but also the pressing block 25 is respectively set at the upper and lower ends of the elastic member 24, so that two-way compression can be achieved with each other. With the help of the gently sloping step setting, efficient installation and disassembly can be achieved without hindering the placement of the protective film 35 mother roll. The upper end of the pressing block 25 can avoid affecting the inner wall surface of the protective film winding barrel 21 by setting an arc angle. The overall structure of the mother roll reel 1 is also simple and reliable, easy to use, and has obvious effect in overcoming the problem of looseness and shaking of the protective film 35 mother roll.

[0059] The telescopic glue coating top block 11 includes a glue coating swing plate 27 that can contact the bottom surface of the protective film 35. One end of the glue coating swing plate 27 is connected by a rotating shaft to form a fulcrum for the glue coating swing plate 27 to swing up and down. The other end of the glue coating swing plate 27 is connected to a glue coating plate pushing cylinder 28 that drives the glue coating swing plate to swing back and forth up and down.

[0060] The telescopic gluing top block 11 is provided with a gluing swing plate 27, and the overall structure is very simple. The main action can be completed by the gluing plate pushing the cylinder 28, and the lower surface of the protective film 35 can be glued conveniently and quickly by swinging back and forth.

[0061] The slitting knife seat 14 includes a sliding guide groove 30 with scale marks 29 on the surface. The sliding guide groove 30 is slidably connected with a connecting plate 31. The end of the connecting plate 31 is provided with a slitting knife seat motor 32. The slitting knife seat motor 32 is connected to a disc cross-cutting blade 33.

[0062] As an embodiment, a cutter mounting seat 36 is provided at the end of the connecting plate 31 , and the cutter mounting seat 36 is connected to the cross-cutting blade 34 .

[0063] The plurality of slitting knife seats 14 of the transverse slitting device 12 can efficiently locate the required transverse cutting position through the sliding guide groove 30 with scale markings 29 on the surface. In terms of the slitting structure, the disc transverse cutting blade 33 is connected through the slitting knife seat motor 32, and the protective film 35 is cut by the disc transverse cutting blade 33 through high-speed rotation. Even if the cutting edge of the disc transverse cutting blade 33 becomes blunt, it can be compensated to a certain extent through high-speed rotation.

[0064] The sliding slitting seat 16 of the longitudinal slitting device 15 is driven by the slitting seat driving block 17 (cylinder or hydraulic cylinder) to efficiently and quickly drive the longitudinal cutting blade 18 to move, so that the protective film 35 after cross-cutting is further longitudinally cut, thereby completing the forming and striping work of the protective film 35.

[0065] As an embodiment, the cross-cutting blade 34 and the longitudinal cutting blade 18 are two obliquely symmetrically arranged square blades, and the cutting edges of the cross-cutting blade 35 and the longitudinal cutting blade 18 face outwards, and the blade tips face upwards.

[0066] Through the structural setting of the upright cutting of the cross-cutting blade 35 and the longitudinal cutting blade 18, the protective film 35 can be cut very sharply without a rotary drive. Even if the cutting edge becomes slightly blunt, it is not easy to cause problems such as slipping or incomplete cutting for the protective film (PVC film) with a smooth surface.

[0067] The basic working principle of the present invention is:

[0068] The protective film reel 21 is tightly fixed by the elastic top pressure piece 3 of the parent roll reel-unwinding device 1, and the protective film 35 on the protective film reel 21 is transported toward the roller conveying device 9 and the winding roller device 19 through the tensioning adjustment roller device 6. The large-sized protective film 35 is cut under the action of the transverse slitting device 12 and the longitudinal slitting device 15, and finally the winding work is completed through the winding roller device 19.

[0069] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for the technical solutions described in the aforementioned embodiments to be modified, or some of the technical features thereof to be replaced by equivalents, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protective film slitting machine, characterized in that: include: A mother roll reeling device, the mother roll reeling device comprising a mother roll reeling shaft for accommodating a protective film reel drum, the mother roll reeling shaft having an elastic pressing member extending out of the mother roll reeling shaft body, the elastic pressing member being able to closely contact and press against the inner wall surface of the protective film reel drum; A slitting and retracting device, the slitting and retracting device comprising a driving part connected to the mother roll reeling shaft via a pulley, a sprocket or a gear, and used to drive the mother roll reeling shaft to rotate clockwise or counterclockwise; A tensioning and adjusting roller pressing device, the tensioning and adjusting roller pressing device comprising a plurality of tensioning and fixing rollers arranged above the parent roll reeling and unwinding device, and a tensioning and adjusting roller arranged on one side of the tensioning and fixing rollers and connected to an adjusting handle; A roller conveying device, the roller conveying device comprising a plurality of roller wheel groups arranged on one side of the tensioning and adjusting roller pressing device in a feeding direction, and a retractable glue coating top block is provided below the roller wheel group; A transverse slitting device, the transverse slitting device comprising a telescopic pressing roller and a plurality of slitting knife seats correspondingly arranged below the telescopic pressing roller for transversely slitting the protective film extruded and conveyed by the roller pressing wheel group; A longitudinal slitting device, comprising a sliding slitting seat arranged at the end of the feeding direction of the roller wheel group, and a slitting seat driving block driving the sliding slitting seat to move back and forth, the sliding slitting seat is provided with a longitudinal cutting blade, and the sliding slitting seat is used to longitudinally cut the protective film extruded and conveyed by the roller wheel group.

2. A protective film slitting machine according to claim 1, characterized in that: It also includes a winding roller device, which includes a plurality of winding rollers arranged at the end of the longitudinal slitting device in the feeding direction, and the winding rollers are used to wind up the protective film after being cut by the transverse slitting device and the longitudinal slitting device.

3. A protective film slitting machine according to claim 1, characterized in that: The elastic pressing member includes a support frame embedded in the inner cavity of the mother roll reel shaft, a mounting groove is provided inside the support frame, an elastic member is provided in the mounting groove, and pressing blocks are provided at both ends of the elastic member, and the ends of the pressing blocks extend out of the shaft body of the mother roll reel shaft.

4. A protective film slitting machine according to claim 3, characterized in that: The top pressing block is in the shape of a long strip as a whole, the upper end of the top pressing block has an inverted arc corner, and both sides of the upper end are provided with gently sloping steps.

5. The protective film slitting machine according to claim 1, characterized in that: The driving part is a servo driving motor.

6. The protective film slitting machine according to claim 1, characterized in that: The tensioning and fixing pressure roller is connected to a tensioning and rotating driving motor which provides driving rotational force.

7. A protective film slitting machine according to claim 5 or 6, characterized in that: The telescopic glue coating top block includes a glue coating swing plate that can contact the bottom surface of the protective film. One end of the glue coating swing plate is connected by a rotating shaft to form a fulcrum for the glue coating swing plate to swing up and down. The other end of the glue coating swing plate is connected to a glue coating plate pushing cylinder that drives the glue coating swing plate to swing back and forth up and down.

8. A protective film slitting machine according to claim 7, characterized in that: The slitting knife seat comprises a sliding guide groove with scale marks on the surface, the sliding guide groove is slidably connected with a connecting plate, the end of the connecting plate is provided with a slitting knife seat motor, and the slitting knife seat motor is connected to a disc cross-cutting blade.

9. A protective film slitting machine according to claim 8, characterized in that: A cutter mounting seat is provided at the end of the connecting plate, and a cross-cutting blade is connected to the cutter mounting seat.

10. A protective film slitting machine according to claim 9, characterized in that: The cross-cutting blade and the longitudinal cutting blade are two obliquely symmetrically arranged square blades, the cutting edges of the cross-cutting blade and the longitudinal cutting blade face outwards, and the blade tips face upwards and stand upright.

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