PVC rigid plastic film supply device

Abstract

The present invention relates to a PVC rigid plastic sheet film feeding device capable of automatically completing the non-overlapping docking of PVC plastic sheets. This PVC rigid plastic sheet film feeding device comprises a base, a first pneumatic shaft, and a second pneumatic shaft, and is characterized in that: a film splicing mechanism is mounted on the base, the film splicing mechanism comprising a film splicing seat, two left and right film suction members, two left and right film cutting knives, a tape holder, tape pulling fingers, a tape cutter, and a tape pressing wheel; the two film suction members are slidably arranged on the film splicing seat and can be driven by a film splicing power source to achieve relative movement, and the film suction members are provided with negative suction holes that can generate negative pressure. This PVC rigid plastic sheet film feeding device achieves non-overlapping automatic docking of thick films through the film splicing mechanism, and has a more reasonable structure, simpler control, and higher efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pharmaceutical packaging production, and in particular to a PVC hard plastic sheet film supply device. Background Art

[0002] When coiled materials are used to process products in pharmaceutical packaging and other industrial fields, after a group of coils is unwound, it is necessary to promptly change the coils and splice the tail of the used coil with the head of the unused coil to continue production. During the splicing process, it is necessary not only to consider material saving, precision and efficiency, but also to ensure the normal production status of the product as much as possible to avoid affecting product quality and precision due to material changes.

[0003] For example, in the field of pharmaceutical inner packaging, the following roll-changing and splicing method is currently used in the blister forming process of tablets to achieve the continuation of the film sheets: when a roll of film is used up, the machine is immediately stopped and replaced with another roll of film; the tail of the previous roll of film and the head of the next roll of film are manually cut flat, the two sets of film sheets are aligned end to end and taped together on their surfaces to achieve the continuation of the film sheets; finally, the blister forming process of the tablet blister machine is started again.

[0004] Currently, for pillow packaging, sanitary products, and printing and packaging equipment, continuous, non-stop production is primarily achieved through the use of automatic roll-changing mechanisms. These mechanisms involve either double-sided tape application (tape is manually placed on a spare roll before joining, achieving semi-automatic joining) or hot-melt splicing (heating the jointed portion of the roll using a heater). Both methods involve overlapping butt-jointing, but this is not suitable for thicker PVC sheets because the overlapping portion is equivalent to twice the thickness of the sheet, complicating the blister forming process and resulting in poor blister formation and machine downtime for cleaning. Consequently, PVC sheet butt-jointing devices are more complex and currently lack a market presence. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention innovatively provides a PVC hard plastic sheet film feeding device that can automatically complete the non-overlapping docking of PVC plastic sheets.

[0006] This PVC hard plastic film feeding device includes an organic base, a first air shaft and a second air shaft, and is characterized in that: a film splicing mechanism is installed on the base, and the film splicing mechanism includes a film splicing seat, two left and right film suction members, two left and right film cutting knives, a tape holder, a tape pulling finger, a tape cutter and a tape pressing wheel; the two film suction members are slidably arranged on the film splicing seat, and are driven by a film splicing power source to achieve relative movement, and the film suction member has a negative suction hole that can generate negative pressure; the left and right film cutting knives are installed on the knife holder, and the knife holder is slidably arranged on the first guide shaft, and the knife holder and the cutting power source that drives the knife holder to move on the first guide shaft are driven by the cutting power source. The adhesive tape cutter is connected to the adhesive tape cutting power source that drives the adhesive tape cutter up and down, and the adhesive tape cutting power source and the adhesive tape cutting power source are both arranged on the adhesive tape cutter frame.

[0007] A tape lifting assembly is provided on the film splicing seat, and the tape lifting assembly includes a tape lifting seat, a tape lifting roller and two telescopic rods. The telescopic rod is telescopically arranged on the tape lifting seat through a spring, and the tape lifting roller is unidirectionally rotatable on the two telescopic rods. The front end of the telescopic rod has a tape lifting part.

[0008] A first detection probe and a first film clamping mechanism are provided between the film joining mechanism and the first inflatable shaft, and a second detection probe and a second film clamping mechanism are provided between the film joining mechanism and the second inflatable shaft.

[0009] The first film clamping mechanism includes a first film clamping cylinder and a film clamping pad, and the second film clamping mechanism includes a second film clamping cylinder and a film clamping pad.

[0010] A buffer mechanism is provided in front of the film splicing mechanism, and a film pulling mechanism is provided between the buffer mechanism and the film splicing mechanism, wherein the film pulling mechanism comprises a film pulling roller.

[0011] According to a PVC hard plastic sheet film feeding device provided by the present invention, thick films can be automatically butted together without overlapping through a film splicing mechanism, which has a more reasonable structure, simpler control and higher efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A perspective view of the present invention;

[0013] Figure 2 It is the front view of the present invention;

[0014] Figure 3It is a three-dimensional diagram of the film splicing mechanism;

[0015] Figure 4 This is the internal diagram of the film splicing mechanism;

[0016] Figure 5 It is a structural diagram of the tape pressure wheel and the tape cutter;

[0017] Figure 6 A schematic diagram of the mechanism for lifting the tape assembly;

[0018] Figure 7 It is a structural diagram of the detection and film clamping mechanism;

[0019] Figure 8 This is the principle diagram of membrane connection.

[0020] 1. Machine base; 2. First air shaft; 3. Second air shaft; 4. Film clamping pad; 5. Adhesive tape; 50. Adhesive tape holder; 54. Adhesive tape lifting holder; 52. Adhesive tape lifting roller; 51. Two telescopic rods; 53. Spring; 6. Film splicing mechanism; 7. Film pulling roller; 8. Buffer mechanism; 60. Film splicing holder; 61. Film suction element; 62. Film cutting knife; 63. Knife holder; 64. Tape pulling finger; 65. Finger holder; 66. First guide shaft ; 650, second guide shaft; 67, tape pressure wheel; 68, movable frame; 69, tape cutter; 610, film closing power source; 630, cutting power source; 670, tape pressing power source; 680, translational power source; 690, tape cutting power source; 43, first detection probe; 44, second detection probe; 41, first film clamping cylinder; 42, second film clamping cylinder; 20, first film roll; 30, second film roll. DETAILED DESCRIPTION

[0021] like Figure 1 As shown, this PVC rigid plastic film feeding device includes an organic base 1, a first inflatable shaft 2, and a second inflatable shaft 3. Both the first inflatable shaft 2 and the second inflatable shaft 3 are mounted on the organic base 1. The first inflatable shaft 2 is used to hold a first film roll 20, and the second inflatable shaft 3 is used to hold a second film roll 30. When the first film roll 20 is used up, the tail of the first film roll 20 is connected to the head of the second film roll 30, thus achieving continuous film feeding.

[0022] In order to realize automatic film splicing, Figure 1 As shown, a film splicing mechanism 6 is installed on the machine base 1 . Figure 2-Figure 4As shown, the film splicing mechanism 6 includes a film splicing seat 60, two left and right film suction members 61, two left and right film cutting knives 62, a tape holder 50, a tape pulling finger 64 (pneumatic finger), a tape cutter 69 and a tape pressing wheel 67; the two film suction members 61 are slidably arranged on the film splicing seat 60, and are driven by a film splicing power source 610 to achieve relative movement, and the film suction member 61 has a negative suction hole that can generate negative pressure; the left and right film cutting knives 62 are installed on a knife holder 63, and the knife holder 63 is slidably arranged on a first guide shaft 66, and the knife holder 63 and the cutting power that drives the knife holder 63 to move on the first guide shaft 66 The power source 630 is connected in transmission connection; the tape rack 50 is used to install the tape 5; the tape pressing wheel 67 is connected in transmission connection to the tape pressing power source 670 that drives the tape pressing wheel 67 to move up and down, and the tape pressing power source 670 is installed on the movable frame 68, and the movable frame 68 is slidably set on the first guide shaft 66, and the movable frame 68 is connected in transmission connection to the translational power source 680 that drives the movable frame 68 to move on the first guide shaft 66; the tape pulling finger 64 is located between the tape pressing wheel 67 and the film cutting knife 62, and the tape pulling finger 64 is installed on the finger frame 65, and the finger frame 65 slides on the second guide shaft 650; Figure 5 As shown, the tape cutter 69 is connected to a tape cutting power source 690 that drives the tape cutter 69 to move up and down. The tape cutting power source 690 and the tape cutter 69 are both installed on the movable frame 68 and move with the movable frame 68.

[0023] The working principle of this film-joining mechanism 6 is as follows: Figure 8As shown, when joining the films, the tail of the first film roll 20 is placed on a film suction member 61, and the negative suction hole of this film suction member 61 absorbs the film material from the bottom, and the head of the second film roll 30 is placed on another film suction member 61, and the negative suction hole of this film suction member 61 absorbs the film material from the bottom (the negative suction hole is connected to the negative pressure source); then the cutting power source 630 drives the knife holder 63 to move, and the knife holder 63 carries the left and right film cutting knives 62 to move forward, so that the left and right film cutting knives 62 respectively cut the tail of the first film roll 20 and the head of the second film roll 30 flat, and while the knife holder 63 moves forward, it pushes the tape pulling finger 64 to the position of the tape 5, and the tape pulling finger 64 clamps the tape 5; after the film cutting knife 62 completes the cutting, the ends of the two films are very flat, and the cutting power source 630 drives the knife holder 63 back to its original position After the film is spread out, the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape 5 is stretched out, and the adhesive tape 5 is stretched out and the adhesive tape Since the films butted together in this way do not overlap, the thickness of the butted parts is the same as that of one film. Since the thickness does not increase, it will not affect the normal operation of the forming machine during forming. After the film is formed, the blister sheet with the butted films can be removed through the subsequent rejection process.

[0024] In order to ensure that the head of the tape is always raised after the tape is cut, so that the tape pulling fingers 64 can clamp it, the present invention provides a tape lifting component on the film splicing seat 60, such as Figure 6As shown, the tape lifting assembly includes a tape lifting seat 54, a tape lifting roller 52 and two telescopic rods 51. The telescopic rod 51 is telescopically arranged on the tape lifting seat 54 through a spring 53, and the tape lifting roller 52 is unidirectionally rotatable on the two telescopic rods 51. The front end of the telescopic rod 51 has a tape lifting portion 510 (extending inward). After the tape is pulled down, it sticks to the tape lifting roller 52 and the tape lifting portion 510 of the telescopic rod 51; when the tape pulling fingers 64 come over, the tape pulling fingers 64 clamp the tape between the two telescopic rods 51, and then pull the tape to move backward, and the tape lifting roller 52 rotates accordingly, so that the tape can be pulled smoothly; when the tape is to be cut, the tape cutter 69 stops moving after hitting the front end of the telescopic rod 51, and the tape cutter 69 moves down to cut the tape, and then the movable frame 68 continues to move and compresses the telescopic rod 51. The telescopic rod 51 makes room for the tape pressing wheel 67 on the movable frame 68 to press on the end of the cut tape, so that the tape is firmly attached to the two films, and when the movable frame 68 returns to its position, the telescopic rod 51 is extended again under the action of the spring 53.

[0025] In order to detect whether the film roll is almost used up, fix the head of the spare film roll at the same time, such as Figure 7 As shown, the present invention is provided with a first detection probe 43 and a first film clamping mechanism between the film splicing mechanism 6 and the first inflatable shaft 2, the first detection probe 43 is used to detect the first film roll, and the first film clamping mechanism is used to fix the head of the first film roll; a second detection probe 44 and a second film clamping mechanism are provided between the film splicing mechanism 6 and the second inflatable shaft 3, the second detection probe 44 is used to detect the second film roll, and the second film clamping mechanism is used to fix the head of the second film roll.

[0026] The first film clamping mechanism includes a first film clamping cylinder 41 and a film clamping pad 4. When the telescopic rod of the first film clamping cylinder 41 is extended forward, the head of the first film roll can be pressed against the film clamping pad 4, thereby fixing the head of the first film roll; the second film clamping mechanism includes a second film clamping cylinder 42 and a film clamping pad 4. When the telescopic rod of the second film clamping cylinder 42 is extended forward, the head of the second film roll can be pressed against the film clamping pad 4, thereby fixing the head of the second film roll.

[0027] Of course, the present invention is provided with a buffer mechanism 8 in front of the film splicing mechanism 6. The buffer mechanism 8 is used to ensure that the film can continue to be supplied during film splicing. In order to pull the tail of the film roll that is almost used up onto the film suction member 61, a film pulling mechanism is provided between the buffer mechanism 8 and the film splicing mechanism 6. The film pulling mechanism includes a film pulling roller 7. When the film roll is detected to be exhausted, the film pulling mechanism continues to pull the tail of the film roll onto the film suction member 61, thereby starting the film splicing process.

Claims

1. A PVC hard plastic film feeding device, comprising an organic base (1), a first inflatable shaft (2) and a second inflatable shaft (3), characterized in that: The base (1) is provided with a film splicing mechanism (6), which comprises a film splicing seat (60), two left and right film absorbing members (61), two left and right film cutting knives (62), a tape holder (50), a tape pulling finger (64), a tape cutting knife (69) and a tape pressing wheel (67); the two film absorbing members (61) are slidably arranged on the film splicing seat (60) and are driven by a film splicing power source (610) to achieve relative movement, and the film absorbing member (61) has a negative pressure element capable of generating a negative pressure. The left and right film cutting knives (62) are mounted on a knife holder (63), the knife holder (63) is slidably mounted on a first guide shaft (66), and the knife holder (63) is connected in transmission with a cutting power source (630) that drives the knife holder (63) to move on the first guide shaft (66); the tape holder (50) is used to install the tape (5); the tape pressing wheel (67) is connected in transmission with a tape pressing power source (670) that drives the tape pressing wheel (67) to move up and down, and the tape pressing drive The power source (670) is installed on the movable frame (68), and the movable frame (68) is slidably arranged on the first guide shaft (66). The movable frame (68) is connected to the translational power source (680) that drives the movable frame (68) to move on the first guide shaft (66); the tape pulling finger (64) is located between the tape pressure wheel (67) and the film cutting knife (62), and the tape pulling finger (64) is installed on the finger frame (65), and the finger frame (65) slides on the second guide shaft. The tape cutter (69) is connected to a tape cutting power source (690) for driving the tape cutter (69) to move up and down, and the tape cutting power source (690) and the tape cutter (69) are both arranged on a movable frame (68); while the knife frame (63) moves forward, it pushes the tape pulling finger (64) to the position where the tape (5) is located; while the movable frame (68) moves, it pushes the tape pulling finger (64) to pull the tape (5) to the designated posting position.

2. The PVC rigid plastic film feeding device according to claim 1, characterized in that: The film splicing seat (60) is provided with a tape lifting assembly, which includes a tape lifting seat (54), a tape lifting roller (52) and two telescopic rods (51). The telescopic rod (51) is telescopically arranged on the tape lifting seat (54) through a spring (53). The tape lifting roller (52) is unidirectionally rotatable on the two telescopic rods (51). The front end of the telescopic rod (51) has a tape lifting portion (510).

3. The PVC rigid plastic film feeding device according to claim 1, characterized in that: A first detection probe (43) and a first film clamping mechanism are provided between the film connecting mechanism (6) and the first inflatable shaft (2), and a second detection probe (44) and a second film clamping mechanism are provided between the film connecting mechanism (6) and the second inflatable shaft (3).

4. The PVC rigid plastic film feeding device according to claim 3, characterized in that: The first film clamping mechanism includes a first film clamping cylinder (41) and a film clamping pad (4), and the second film clamping mechanism includes a second film clamping cylinder (42) and a film clamping pad (4).

5. The PVC rigid plastic film feeding device according to claim 4, characterized in that: A buffer mechanism (8) is provided in front of the film joining mechanism (6), and a film drawing mechanism is provided between the buffer mechanism (8) and the film joining mechanism (6), wherein the film drawing mechanism includes a film drawing roller (7).

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