Device for breaking the line at the punching point on the plastic film and generating a cutting signal trigger structure

Abstract

A device for punching a point break on a plastic film and generating a cutting signal trigger structure, characterized in that it includes a point break punching device installed on a crossbeam and a cutting signal trigger structure generating device located in front of or behind it, and a support plate is provided below the point break punching device and the cutting signal trigger structure generating device. The advantage of the present invention is that when a set length of plastic film is rolled up on a reel, a point break and a cutting signal trigger mark or detection hole are punched out on the plastic film in advance, and when the point break is about to reach the punching device, the detection sensor senses the mark or detection hole and sends a signal to start the punching device. The punching device punches the point break when the point break arrives. Since there is a point break, it is easy to punch, avoiding the phenomenon of cutting failure, and improving the cutting success rate and work efficiency.

Description

Technical Field

[0001] The invention relates to a device for breaking a punching point on a plastic film and generating a cutting signal trigger structure, which is a matching device for a film blowing machine. Background Art

[0002] The plastic film output by the film blowing machine needs to be rolled on a reel (usually a paper reel) during production. When the reel is full of the set length of plastic film, the plastic film needs to be cut. Since the reel rotates very fast, if conventional methods (such as using a cutter) are used to cut the fast-moving plastic film, the fracture will tear and lengthen, which not only wastes materials, but also may cause the film to fail to be cut. In this case, the machine must be stopped for processing, which reduces production efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a device for breaking a line at a punching point on a plastic film and generating a cutting signal trigger structure to solve the above-mentioned problems existing in the prior art.

[0004] The technical solution of the present invention is: a device for punching point break lines on a plastic film and generating a cutting signal trigger structure, characterized in that it includes a point break line punching device installed on a crossbeam and a cutting signal trigger structure generating device located in front of or behind it, and a support plate is provided below the point break line punching device and the cutting signal trigger structure generating device.

[0005] The advantages of the present invention are as follows: when the roll is fully rolled up with a set length of plastic film, a point break is punched out on the plastic film in advance and a cutting signal trigger mark or detection hole is generated; when the point break is about to reach the punching device, the detection sensor senses the mark or detection hole and sends a signal to start the punching device; the punching device punches the point break when the point break arrives; since there is a point break, it is easy to punch and break, thus avoiding the phenomenon of cutting failure and improving the cutting success rate and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the side structure of the first embodiment of the present invention (forming dotted lines and detection holes);

[0007] Figure 2 is a schematic diagram of the side structure of the second embodiment of the present invention (forming dotted lines and marks);

[0008] Figure 3 is a schematic diagram of a plastic film on which dotted lines and detection holes or marks are formed.

[0009] Explanation of the reference numerals in the accompanying drawings: 1. dot-break line punching device, 11. first cylinder, 12. serrated punching knife, 2. cutting signal trigger structure generating device, 21. second cylinder, 22. punch, 23. die, 24. ink cartridge, 25. nozzle or print head, 3. crossbeam, 4. support plate, 5. plastic film, 51. dot-break line, 52. detection hole. DETAILED DESCRIPTION

[0010] See also Figure 1-Figure 2 The present invention discloses a device for punching a point break line on a plastic film and generating a cutting signal trigger structure, which is characterized in that it includes a point break line punching device 1 installed on a crossbeam 3 and a cutting signal trigger structure generating device 2 located in front of or behind it, and a support plate 4 is provided below the point break line punching device 1 and the cutting signal trigger structure generating device 2.

[0011] The cutting signal trigger structure generating device 2 is a detection hole punching device (such as Figure 1 as shown) or a marking generating device (as shown Figure 2 as shown).

[0012] The dot-break line punching device 1 comprises a first cylinder 11 and a sawtooth punching knife 12 . The cylinder 11 is installed on the crossbeam 3 , and the bottom end of the piston rod at the lower end of the first cylinder 11 is connected to the sawtooth punching knife 12 .

[0013] The detection hole punching device includes a second cylinder 21, a punch 22 and a die 23. The second cylinder 21 is installed on the top of the crossbeam 3. The bottom end of the piston rod at the lower end of the second cylinder 21 is connected to the punch 22. A die 23 corresponding to the punch 22 is installed on the support plate 4, and the bottom of the die 23 can be connected to the bottom.

[0014] The marking generating device is a marking spraying or printing device (such as Figure 2 As shown), the device consists of an ink cartridge 24 and a nozzle or print head 25, which is a prior art.

[0015] The working principle of the present invention is described as follows:

[0016] When the roll is fully rolled up with a set length of plastic film 5, a point break line 51 and a cutting signal trigger mark or detection hole 52 are punched out on the plastic film 5 in advance. When the point break line 51 is about to reach the punching device (by continuously controlling this time), the detection sensor senses the mark or detection hole and sends a signal to start the punching device. The punching device punches the point break line 51 when the point break line 51 arrives. The positions of the point break line 51 and the detection hole 52 can be interchanged.

Claims

1. A method for punching a point break on a plastic film and generating a cutting signal trigger structure, the method using a device for punching a point break on a plastic film and generating a cutting signal trigger structure, the device comprising a point break punching device (1) mounted on a crossbeam (3) and a cutting signal trigger structure generating device (2) located in front of or behind the point break punching device (1) and a cutting signal trigger structure generating device (2), a support plate (4) is provided below the point break punching device (1) and the cutting signal trigger structure generating device (2); The cutting signal trigger structure generating device (2) is a marking generating device or a detection hole punching device; The dot-break line punching device (1) comprises a first cylinder (11) and a sawtooth punching knife (12), wherein the cylinder (11) is mounted on the crossbeam (3), and the bottom end of the piston rod at the lower end of the first cylinder (11) is connected to the sawtooth punching knife (12); The marking generating device is a marking spraying or printing device; The detection hole punching device comprises a second cylinder (21), a punch (22) and a die (23); the second cylinder (21) is mounted on the crossbeam (3); the bottom end of the piston rod at the lower end of the second cylinder (21) is connected to the punch (22); and a die (23) corresponding to the punch (22) is mounted on the support plate (4); It is characterized in that When the roll is fully rolled up with a set length of plastic film, a point break line is punched out on the plastic film and a cutting signal trigger mark or a detection hole is generated by using the device for punching a point break line and generating a cutting signal trigger structure in advance. When the point break line is about to reach the breaking device, the detection sensor senses the mark or the detection hole and sends a signal to start the breaking device. The breaking device will break the point break line when it arrives.

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