Film receiving and cutting device

Abstract

The utility model discloses a film receiving and cutting device, and relates to the technical field of packaging machinery. The film cutting device comprises a film receiving mechanism and a film cutting mechanism, the film cutting mechanism comprises two film cutting assemblies, each film cutting assembly comprises an upper cutting knife rest and a lower cutting knife rest, an upper cutting knife is assembled on each upper cutting knife rest, a lower cutting knife shaft is assembled on each lower cutting knife rest, and a lower cutting knife is assembled on each lower cutting knife shaft; the film connecting mechanism comprises a first film connecting swing shaft, a second film connecting swing shaft, a first film connecting roller, a second film connecting roller and a film connecting air cylinder, and the film connecting air cylinder drives the first film connecting swing shaft and the second film connecting swing shaft to relatively rotate in a reciprocating mode so as to drive the first film connecting roller and the second film connecting roller to swing close to each other or away from each other. A rotary film cutting mode is adopted, and a transmission structure of the two film connecting rollers is improved, so that the film connecting rollers and the film cutting mechanism can react rapidly, the action time of the film connecting rollers and the film cutting mechanism is shortened, the linear speed application range of the automatic film connecting structure is widened, and automatic film connecting without speed reduction can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machinery, in particular to the technical field of film packaging machinery, and more specifically to a film cutting device. Background Art

[0002] At present, in the field of film packaging machinery, there are many automatic film splicing devices that can realize automatic film splicing without stopping the machine. For example, the utility model patent with the publication date of July 5, 2019, the publication number of CN209065131U, and the name of "an automatic film splicing device with cutting function" includes a film splicing cylinder, a film splicing roller, a fixed roller, a mounting frame and two sets of cutting mechanisms. The fixed roller is installed on the mounting frame. The film splicing roller is connected to the film splicing cylinder and moves closer to or away from the fixed roller under the drive of the film splicing cylinder. One set of cutting mechanisms is installed on one side of the film splicing roller in the film feeding direction, and the other set of cutting mechanisms is installed on one side of the fixed roller in the film feeding direction. The utility model cuts off the tail film of the packaging film to avoid affecting the film splicing function due to the tail film automatically rolling up to the middle.

[0003] The automatic film splicing structure in the prior art usually needs to reduce the speed of film splicing. The reaction time of the film splicing structure and the action time of the film splicing cylinder both limit the applicable range of the linear speed of the automatic film splicing structure. Utility Model Content

[0004] In order to overcome the defects and shortcomings in the above-mentioned prior art, the utility model provides a film splicing and cutting device. The purpose of the invention of the utility model is to solve the problem that the automatic film splicing structure in the prior art needs to reduce the speed of film splicing. The utility model adopts a rotary film cutting method to replace the existing cylinder reciprocating film cutting method, and at the same time improves the transmission structure of the two film splicing rollers, so that the film splicing roller and the film cutting mechanism can react quickly, reduce the action time of the film splicing roller and the film cutting mechanism, increase the applicable range of the linear speed of the automatic film splicing structure, and achieve automatic film splicing without reducing the speed, thereby improving the film splicing efficiency.

[0005] In order to solve the above problems existing in the prior art, the utility model is implemented through the following technical solutions.

[0006] The utility model provides a film splicing and cutting device, comprising a film splicing mechanism, a film cutting mechanism and a mounting seat, wherein the film splicing mechanism and the film cutting mechanism are both mounted on the mounting seat; the film cutting mechanism comprises two groups of film cutting assemblies, which are respectively arranged at two ends of the film splicing mechanism; the film cutting assembly comprises an upper cutting knife holder and a lower cutting knife holder, wherein an upper cutting knife is mounted on the upper cutting knife holder, a lower cutting knife shaft is mounted on the lower cutting knife holder, a lower cutting knife shaft is mounted on the lower cutting knife shaft, the lower cutting knife shaft rotates under the drive of the cutting drive assembly, drives the lower cutting knife to rotate, and the lower cutting knife cooperates with the upper cutting knife to shear the film passing between the upper cutting knife and the lower cutting knife;

[0007] The film joining mechanism comprises a first film joining swing shaft, a second film joining swing shaft, a first film joining roller, a second film joining roller and a film joining cylinder. The first film joining roller is mounted on the first film joining swing shaft via a first swing mounting seat, and the second film joining roller is mounted on the second film joining swing shaft via a second swing mounting seat. The first film joining swing shaft and the second film joining swing shaft are both rotatably mounted on the mounting seat, and the ends of the first film joining swing shaft and the second film joining swing shaft are meshed and driven by a pair of gears. A film joining swing arm is fixedly mounted on the end of one of the film joining swing shafts, one end of the film joining cylinder is fixedly mounted on the mounting seat, and the other end is connected to the film joining swing arm. The film joining cylinder drives the first film joining swing shaft and the second film joining swing shaft to rotate back and forth relative to each other, thereby driving the first film joining roller and the second film joining roller to swing towards or away from each other.

[0008] Further preferably, a mounting surface for mounting the lower cutting knife is provided on the lower cutting knife shaft, and the lower cutting knife is fixedly assembled on the mounting surface via a pressing plate, and the lower cutting knife is located between the mounting surface and the pressing plate.

[0009] More preferably, the lower cutting knife is provided with an inclination angle of 0.2° to 0.8° on the mounting surface of the lower cutting knife shaft.

[0010] Further preferably, the lower cutting tool holder is mounted on a mounting seat, one end of the upper cutting tool holder is hinged to the lower cutting tool holder, and the other end is locked and fixed by a pressing lock assembly.

[0011] Further preferably, the film joining mechanism also includes a first film guide roller and a second film guide roller, the first film guide roller is rotatably mounted on a first swing mounting seat, and the first film joining swing shaft is located between the first film guide roller and the first film joining roller; the second film guide roller is rotatably mounted on a second swing mounting seat, and the second film joining swing shaft is located between the second film guide roller and the second film joining roller.

[0012] More preferably, a detection mounting plate is fixedly connected to the end of one of the first film-joining swing shaft and the second film-joining swing shaft, and a film-joining detection sensor is arranged on the detection mounting plate.

[0013] Further preferably, a film pressing plate is provided on the film entry side of the film cutting assembly.

[0014] Compared with the prior art, the beneficial technical effects brought by the utility model are as follows:

[0015] 1. The utility model improves the transmission structure of the film joining mechanism, adopts the transmission mode of film joining cylinder, film joining swing shaft and gear, under the relative meshing action of gear, two film joining rollers are in contact with each other, and the time taken is half of the existing fixed roller and film joining roller mode, which can realize fast film joining and achieve the reaction time period, so that there is no need to reduce the linear speed of the conveying packaging film when joining the film. At the same time, after the film joining is completed, the remaining film is cut off by rotary shearing, which has less impact on the film than the existing cylinder extrusion cutting mode, and can quickly respond to film cutting, reducing the probability of film jamming and film explosion in subsequent procedures caused by excessive residual film after film joining.

[0016] 2. The utility model installs the cutting lower cutter through the pressing plate. The pressing plate and the mounting surface on the cutting lower cutter shaft clamp the cutting lower cutter, which ensures the stability of the cutting lower cutter, improves the mounting strength of the cutting lower cutter, and prolongs its service life. The mounting surface of the cutting lower cutter shaft is set at an inclination angle of 0.2°~0.8° to ensure the neatness of the film edge after cutting the residual film and avoid the film from being skewed.

[0017] 3. The installation structure of the lower cutting knife holder and the upper cutting knife holder of the utility model is convenient for installation and disassembly, and is convenient for maintenance and replacement of the lower cutting knife, the lower cutting knife shaft and the upper cutting knife, and is also convenient for film threading.

[0018] 4. The utility model is provided with a film guide roller to ensure smooth film transportation. When the film splicing roller swings, the film guide roller can also swing along with the film splicing roller. Under the film guiding action of the film guide roller, smooth film splicing is ensured and the film is smoothly transported.

[0019] 5. The utility model is provided with a film splicing detection sensor, which detects whether the film splicing rollers are in contact and whether the film splicing action is successfully completed. When the film splicing is completed, the film cutting mechanism starts to cut off the remaining film to prevent the remaining film from being too long.

[0020] 6. The utility model arranges a film pressing plate on the film entry side of the film cutting assembly to ensure the smoothness of film transportation, so that the film smoothly enters the film cutting assembly, and the film cutting assembly is convenient for neatly cutting the transported film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the film cutting device of the utility model;

[0022] Figure 2 This is a schematic diagram of the assembly structure of the film cutting device of the utility model;

[0023] Figure 3 This is a schematic diagram of the main structure of the film cutting device of the utility model;

[0024] Figure 4 It is a rear view structural schematic diagram of the film cutting device of the utility model;

[0025] Figure 5 It is a three-dimensional structural schematic diagram of the film cutting assembly in the film cutting device of the utility model;

[0026] Figure 6 This is a structural principle diagram of the film cutting assembly in the film cutting device of the utility model;

[0027] Figure numerals: 1. film joining mechanism, 2. film cutting mechanism, 3. mounting seat, 4. film cutting assembly, 5. upper cutting knife holder, 6. lower cutting knife holder, 7. upper cutting knife, 8. lower cutting knife shaft, 9. lower cutting knife, 10. first film joining swing shaft, 11. second film joining swing shaft, 12. first film joining roller, 13. second film joining roller, 14. first swing mounting seat, 15. second swing mounting seat, 16. gear, 17. film joining swing arm, 18. film joining cylinder, 19. mounting surface, 20. pressing plate, 21. clamping locking assembly, 22. first film guide roller, 23. second film guide roller, 24. detection mounting plate, 25. film joining detection sensor, 26. film pressing plate. DETAILED DESCRIPTION

[0028] The following are exemplary embodiments of the present invention that are combined with the accompanying drawings to help fully understand the claims and their equivalents, wherein the specific details are only considered as exemplary and do not limit the scope of the present invention. Therefore, those of ordinary skill in the art can make various changes and modifications to the embodiments without departing from the scope and spirit of the present invention.

[0029] Example 1

[0030] As a preferred embodiment of the present invention, refer to the attached specification Figure 1 and attached Figure 2 As shown, this embodiment discloses a film splicing and cutting device, including a film splicing mechanism 1, a film cutting mechanism 2 and a mounting seat 3, wherein the film splicing mechanism 1 and the film cutting mechanism 2 are both assembled on the mounting seat 3; the film cutting mechanism 2 includes two groups of film cutting components 4, and the two groups of film cutting components 4 are respectively arranged at both ends of the film splicing mechanism 1.

[0031] Refer to the instruction manual Figure 5 and attached Figure 6 As shown, the film cutting assembly 4 includes an upper cutting knife holder 5 and a lower cutting knife holder 6, the upper cutting knife holder 5 is equipped with an upper cutting knife 7, the lower cutting knife holder 6 is equipped with a lower cutting knife shaft 8, the lower cutting knife shaft 8 is equipped with a lower cutting knife 9, the lower cutting knife shaft 8 rotates under the drive of the cutting drive assembly, driving the lower cutting knife 9 to rotate, and the lower cutting knife 9 cooperates with the upper cutting knife 7 to cut the film passing between the upper cutting knife 7 and the lower cutting knife 9;

[0032] Refer to the instruction manual Figure 3 and attached Figure 4As shown, the film splicing mechanism 1 comprises a first film splicing swing shaft 10, a second film splicing swing shaft 11, a first film splicing roller 12, a second film splicing roller 13 and a film splicing cylinder 18. The first film splicing roller 12 is mounted on the first film splicing swing shaft 10 through a first swing mounting seat 14, and the second film splicing roller 13 is mounted on the second film splicing swing shaft 11 through a second swing mounting seat 15; the first film splicing swing shaft 10 and the second film splicing swing shaft 11 are both rotatably mounted on the mounting seat 3, and the ends of the first film splicing swing shaft 10 and the second film splicing swing shaft 11 are meshed and driven by a pair of gears 16; a film splicing swing arm 17 is fixedly mounted on the end of one of the film splicing swing shafts, one end of the film splicing cylinder 18 is fixedly mounted on the mounting seat 3, and the other end is connected to the film splicing swing arm 17; the film splicing cylinder 18 drives the first film splicing swing shaft 10 and the second film splicing swing shaft 11 to reciprocate relative to each other, thereby driving the first film splicing roller 12 and the second film splicing roller 13 to swing closer to or away from each other.

[0033] This is how it works, refer to the instruction manual. Figure 2 As shown, the film splicing device of this embodiment is located below the film placing device. The film placing device is provided with two film rolls, one of which is a main film roll and the other is a spare film roll. Figure 2 The left film roll in the definition is the main film roll. Figure 2 The film roll on the middle right is defined as the spare film roll. The film released from the main film roll enters the film former for packaging through the film feeding mechanism and the film splicing and cutting device. A section of film is pulled out from the spare film roll, passes through the film feeding mechanism, enters the film splicing and cutting device, and enters the film splicing roller of the film splicing device. Double-sided tape is pasted on the film and waits for film splicing.

[0034] When the film on the main film roll is finished, the film shortage induction switch on the main film roll side senses the film shortage, and the film splicing mechanism 1 in the film splicing device is started, and the film splicing cylinder 18 is activated. Figure 4 As shown, the film splicing cylinder 18 extends, and the film splicing swing arm 17 swings clockwise, driving the first film splicing swing shaft 10 to rotate clockwise. Under the meshing transmission of the gear 16, the second film splicing swing shaft 11 rotates counterclockwise, thereby driving the first film splicing roller 12 and the second film splicing roller 13 to approach each other. When the first film splicing roller 12 approaches the second film splicing roller 13, the spare film waiting for splicing on the second film splicing roller 13 is pasted together with the main film. As the main film continues to be conveyed, the spare film is rolled and unrolled, and the film of the spare film roll enters the bag forming device along with the main film.

[0035] After the film joining is completed, the film cutting assembly 4 on the side of the first film joining roller 12 is activated to cut off the excess packaging film on the main film side to avoid excessive length of the remaining film after the jointing.

[0036] This embodiment improves the transmission structure of the film joining mechanism 1, and adopts the transmission method of the film joining cylinder 18, the film joining swing shaft and the gear 16. Under the relative meshing action of the gear 16, the two film joining rollers are in contact with each other, and the time taken is half of the existing fixed roller and film joining roller method, which can achieve rapid film joining and achieve a reaction time period, so that there is no need to reduce the linear speed of the conveying packaging film when joining the film. At the same time, after the film joining is completed, the remaining film is cut off by rotary shearing. Compared with the existing cylinder squeezing and cutting method, the impact on the film is smaller, and the film can be cut quickly, which reduces the probability of the remaining film being too long after the film joining, resulting in the subsequent process of film jamming and film explosion.

[0037] Example 2

[0038] As another preferred embodiment of the present utility model, this embodiment is a further detailed supplement and elaboration of the technical solution of the present utility model based on the above-mentioned embodiment 1.

[0039] As an implementation method of this embodiment, refer to the attached Figure 6 As shown, the lower cutting blade shaft 8 is provided with a mounting surface 19 for mounting the lower cutting blade 9 , and the lower cutting blade 9 is fixedly assembled on the mounting surface 19 through a pressing plate 20 , and the lower cutting blade 9 is located between the mounting surface 19 and the pressing plate 20 .

[0040] As an implementation method of this embodiment, refer to the attached Figure 5 As shown, the lower cutting knife 9 is provided with an inclination angle of 0.2° to 0.8° on the mounting surface 19 of the lower cutting knife shaft 8 .

[0041] In this embodiment, the lower cutting blade 9 is installed by the pressing plate 20. The pressing plate 20 and the mounting surface 19 on the lower cutting blade shaft 8 clamp the lower cutting blade 9, ensuring the stability of the lower cutting blade 9, and also improving the mounting strength of the lower cutting blade 9 and extending its service life. The mounting surface 19 of the lower cutting blade shaft 8 is set at an inclination angle of 0.2° to 0.8° to ensure the neatness of the film edge after cutting the residual film and avoid the film from being skewed.

[0042] As an implementation method of this embodiment, refer to the attached Figure 1 and 3 As shown, the lower cutting blade holder 6 is mounted on the mounting seat 3, one end of the upper cutting blade holder 5 is hinged on the lower cutting blade holder 6, and the other end is locked and fixed by a pressing lock assembly 21. It is convenient to install and disassemble, and it is convenient to maintain and replace the lower cutting blade 9, the lower cutting blade shaft 8 and the upper cutting blade 7, and it is also convenient to wear the film.

[0043] Example 3

[0044] As another preferred embodiment of the present utility model, this embodiment is a further detailed supplement and elaboration of the technical solution of the present utility model based on the above-mentioned embodiment 1 or embodiment 2.

[0045] As an implementation method of this embodiment, refer to the attached Figure 1 As shown, the film joining mechanism 1 also includes a first film guide roller 22 and a second film guide roller 23, wherein the first film guide roller 22 is rotatably mounted on a first swing mounting seat 14, and the first film joining swing shaft 10 is located between the first film guide roller 22 and the first film joining roller 12; the second film guide roller 23 is rotatably mounted on a second swing mounting seat 15, and the second film joining swing shaft 11 is located between the second film guide roller 23 and the second film joining roller 13.

[0046] In this embodiment, a film guide roller is provided to ensure smooth film transportation. When the film splicing roller swings, the film guide roller can also swing along with the film splicing roller. Under the film guiding action of the film guide roller, smooth film splicing is ensured and the film is smoothly transported.

[0047] As an implementation method of this embodiment, refer to the attached Figure 3 As shown, a detection mounting plate 24 is fixedly connected to the end of one of the first film-joining swing shaft 10 and the second film-joining swing shaft 11, and a film-joining detection sensor 25 is arranged on the detection mounting plate 24. The film-joining detection sensor 25 detects whether the film-joining rollers are in contact and whether the film-joining action is successfully completed. When the film-joining is completed, the film cutting mechanism 2 starts to cut off the residual film to prevent the residual film from being too long.

[0048] As an implementation method of this embodiment, refer to the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, a film pressing plate 26 is provided at the film entry side of the film cutting assembly 4 to ensure smooth film transportation, so that the film can smoothly enter the film cutting assembly 4 and the film cutting assembly 4 can neatly cut the transported film.

[0049] While the inventive concept has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made thereto without departing from the spirit and scope of the invention as defined in the claims.

Claims

1. A film splicing and cutting device, comprising a film splicing mechanism (1), a film cutting mechanism (2) and a mounting seat (3), wherein the film splicing mechanism (1) and the film cutting mechanism (2) are both mounted on the mounting seat (3); the film cutting mechanism (2) comprises two groups of film cutting components (4), and the two groups of film cutting components (4) are respectively arranged at two ends of the film splicing mechanism (1); characterized in that: The film cutting assembly (4) comprises an upper cutting knife holder (5) and a lower cutting knife holder (6); an upper cutting knife (7) is mounted on the upper cutting knife holder (5); a lower cutting knife shaft (8) is mounted on the lower cutting knife holder (6); a lower cutting knife (9) is mounted on the lower cutting knife shaft (8); the lower cutting knife shaft (8) rotates under the drive of the cutting drive assembly, driving the lower cutting knife (9) to rotate; the lower cutting knife (9) cooperates with the upper cutting knife (7) to cut the film passing between the upper cutting knife (7) and the lower cutting knife (9); The film joining mechanism (1) comprises a first film joining swing shaft (10), a second film joining swing shaft (11), a first film joining roller (12), a second film joining roller (13) and a film joining cylinder (18); the first film joining roller (12) is mounted on the first film joining swing shaft (10) via a first swing mounting seat (14); the second film joining roller (13) is mounted on the second film joining swing shaft (11) via a second swing mounting seat (15); the first film joining swing shaft (10) and the second film joining swing shaft (11) are both rotatably mounted on the mounting seat (3); The ends of a film-joining swing shaft (10) and a second film-joining swing shaft (11) are meshed and driven by a pair of gears (16); a film-joining swing arm (17) is fixedly mounted on the end of one of the film-joining swing shafts; one end of a film-joining cylinder (18) is fixedly mounted on a mounting seat (3) and the other end is connected to the film-joining swing arm (17); the film-joining cylinder (18) drives the first film-joining swing shaft (10) and the second film-joining swing shaft (11) to rotate back and forth relative to each other, thereby driving the first film-joining roller (12) and the second film-joining roller (13) to swing towards or away from each other.

2. A film cutting device according to claim 1, characterized in that: The lower cutting blade shaft (8) is provided with a mounting surface (19) for mounting the lower cutting blade (9); the lower cutting blade (9) is fixedly mounted on the mounting surface (19) via a pressing plate (20), and the lower cutting blade (9) is located between the mounting surface (19) and the pressing plate (20).

3. A film cutting device according to claim 2, characterized in that: The lower cutting knife (9) is provided with an inclination angle of 0.2° to 0.8° on the mounting surface (19) of the lower cutting knife shaft (8).

4. A film cutting device according to any one of claims 1 to 3, characterized in that: The lower cutting tool holder (6) is mounted on the mounting seat (3); one end of the upper cutting tool holder (5) is hinged on the lower cutting tool holder (6), and the other end is locked and fixed by a pressing lock assembly (21).

5. A film cutting device according to any one of claims 1 to 3, characterized in that: The film joining mechanism (1) further comprises a first film guide roller (22) and a second film guide roller (23); the first film guide roller (22) is rotatably mounted on a first swing mounting seat (14), and a first film joining swing shaft (10) is located between the first film guide roller (22) and the first film joining roller (12); the second film guide roller (23) is rotatably mounted on a second swing mounting seat (15), and a second film joining swing shaft (11) is located between the second film guide roller (23) and the second film joining roller (13).

6. A film cutting device according to claim 5, characterized in that: A detection mounting plate (24) is fixedly connected to the end of one of the first film-joining swing shaft (10) and the second film-joining swing shaft (11), and a film-joining detection sensor (25) is provided on the detection mounting plate (24).

7. A film cutting device according to any one of claims 1 to 3, characterized in that: A film pressing plate (26) is provided on the film entry side of the film cutting assembly (4).

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