PVC (polyvinyl chloride) thermal recovery film cutting device
By designing a PVC heat-shrink film cutting device, a sprocket-driven moving bracket is used to translate and clamp the heat-shrink film, solving the problem of cut shrinkage during cutting, improving production efficiency and reducing material waste.
Patent Information
- Application Number
- CN202520167695.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-23
AI Technical Summary
Existing PVC heat-shrink film tends to shrink at the cut edge during cutting, resulting in low production efficiency and material waste.
Design a PVC heat-shrink film cutting device, including a frame, a take-up roller, a movable support, an upper pressure plate and a lower pressure plate. The movable support is driven to move horizontally by a sprocket. The upper and lower pressure plates clamp the heat-shrink film. The cutting blade cuts between the pressure plates, ensuring that the cutting speed is synchronized with the take-up speed.
It effectively prevents shrinkage at the cut of the heat-shrinkable film, improves production efficiency, and reduces material waste.
Smart Images
Figure CN223822987U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to PVC heat shrink film production technical field, concretely to a PVC heat shrink film cutting device. BACKGROUND
[0002] The PVC heat shrink film is characterized by good transparency, easy shrinkage, high strength and adjustable shrinkage rate, and is widely used in the packaging of various products, and has good effects of anti-loosening, rainproof and dustproof. In the processing process of the PVC heat shrink film, the finished heat shrink film is wound on a winding roller, and the heat shrink film roll has a specified thickness size, and the heat shrink film needs to be cut when winding to the specified thickness, and because the PVC heat shrink film itself has the shrinkage characteristic, the existing production equipment is prone to shrinkage at the cutting part of the heat shrink film during cutting, and manual reorganization is required before rewinding, which leads to low production efficiency, and the heat shrink film cannot be used when the cutting part is seriously shrunk, which also causes waste.
[0003] In the utility model
[0004] In view of the defects of the prior art, the utility model solves the technical problem of providing a PVC heat shrink film cutting device to solve the shrinkage problem of the cutting part during cutting of the existing PVC heat shrink film.
[0005] To solve the above problems, the utility model adopts the following technical scheme: a PVC heat shrink film cutting device, comprising a rack, a winding roller, a movable support, an upper pressing plate and a lower pressing plate, the winding roller is rotatably installed on the rack, the movable support is slidably installed on the rack, the upper pressing plate and the lower pressing plate are slidably installed on the movable support, an electric telescopic rod is arranged on the movable support and connected with the upper pressing plate and the lower pressing plate, a pressing strip is arranged at the lower end of the upper pressing plate, a spring is arranged between the pressing strip and the upper pressing plate, a cutting knife is arranged at the middle position of the lower end of the upper pressing plate, the cutting knife is arranged between the two pressing strips and parallel to the pressing strips, the lower end surface of the pressing strip is lower than the cutting knife in a free state, a driving pulley is arranged on the shaft of the winding roller, a sliding block is arranged on the two sides of the movable support, a sliding groove is arranged on the rack and matched with the sliding block, the sliding block extends out of the rack, two chain wheels are arranged on the two sides of the rack, a chain is arranged on the chain wheels, the part of the sliding block extending out of the rack is arranged above the chain, a transmission shaft is arranged at the center of the chain wheel, a driven pulley coaxial with the chain wheel is arranged on the transmission shaft close to the winding roller, the driving pulley and the driven pulley are connected through a synchronous belt, the driven pulley is rotatably connected with the transmission shaft, an electromagnetic clutch is arranged on the transmission shaft, and the electromagnetic clutch is coaxial with the driven pulley.
[0006] The beneficial effect of the scheme is: relative to the prior art, the heat shrink film cutting device of the utility model is through setting the moving support, the moving support is driven through the chain wheel, the chain wheel is connected with the winding roller through the belt wheel, the translation speed of the moving support is same with the heat shrink film, the upper pressing plate and the lower pressing plate are set on the moving support, the lower end of the upper pressing plate is provided with the pressing strip on both sides and the cutting knife in the middle, the pressing strip and the lower pressing plate clamp the heat shrink film when the cutting knife cuts the heat shrink film, and the heat shrink film cutting part of the cutting can be guaranteed not to shrink.
[0007] Further, the reset motor is arranged on the rack, and the reset motor and the transmission shaft are connected through the belt wheel and the belt transmission.
[0008] Further, the rack can be provided with an infrared sensor to detect the position of the moving support.
[0009] Further, the diameters of the driving belt wheel and the driven belt wheel are same, and the diameter of the chain wheel is same with the diameter of the heat shrink film roll product.
[0010] Further, the cutting knife is detachably installed, so that the cutting knife can be conveniently maintained or replaced.
[0011] Further, the chain is provided with a mounting plate, the mounting plate is provided with a threaded hole, the sliding block of the moving support is provided with a mounting hole, and the sliding block and the mounting plate are connected through a screw. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is a whole structure schematic view of the utility model;
[0013] Fig. 2 It is an upper pressing plate structure schematic view of the utility model;
[0014] In the figure: 1-rack, 2-winding roller, 3-moving support, 4-upper pressing plate, 5-lower pressing plate, 6-electric telescopic rod, 7-pressing strip, 8-spring, 9-driving belt wheel, 10-sliding block, 11-sliding slot, 12-chain wheel, 13-chain, 14-transmission shaft, 15-driven belt wheel, 16-synchronous belt, 17-electromagnetic clutch, 18-reset motor, 19-cutting knife, 20-mounting plate. DETAILED DESCRIPTION
[0015] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0016] The embodiments are as follows Figs. 1-2The device comprises a frame 1, a winding roller 2, a moving support 3, an upper pressing plate 4 and a lower pressing plate 5. The winding roller 2 is rotatably installed on the frame 1. The moving support 3 is slidably installed on the frame 1. The upper pressing plate 4 and the lower pressing plate 5 are slidably installed on the moving support 3. An electric telescopic rod 6 is arranged on the moving support 3 and connected with the upper pressing plate 4 and the lower pressing plate 5. The electric telescopic rod 6 drives the upper pressing plate 4 and the lower pressing plate 5 to slide. Two pressing strips 7 are arranged on the lower end of the upper pressing plate 4. A spring 8 is arranged between the pressing strip 7 and the upper pressing plate 4. A cutting knife 19 is arranged on the lower end of the upper pressing plate 4. The cutting knife 19 is arranged between the two pressing strips 7 and parallel to the pressing strips 7. The lower end surface of the pressing strip 7 is lower than the cutting knife 19 in a free state. A driving pulley 9 is arranged on the roller shaft of the winding roller 2. Two sliding blocks 10 are arranged on the two sides of the moving support 3. A sliding groove 11 is arranged on the frame 1 and matched with the sliding blocks 10. The sliding blocks 10 extend out of the frame 1. Two chain wheels 12 are arranged on the two sides of the frame 1. A chain 13 is arranged on the chain wheels 12. The part of the sliding blocks 10 extending out of the frame 1 is arranged above the chain 13. The chain 13 is driven by the chain wheels 12. A transmission shaft 14 is arranged in the center of the chain wheel 12. A driven pulley 15 coaxial with the chain wheel 12 is arranged on the transmission shaft 14 close to the winding roller 2. The driving pulley 9 and the driven pulley 15 are connected by a synchronous belt 16. The rotation speed of the driving pulley 9 and the driven pulley 15 is kept the same. The driven pulley 15 is rotatably connected with the transmission shaft 14. An electromagnetic clutch 17 is arranged on the transmission shaft 14 and coaxial with the driven pulley 15. When the electromagnetic clutch 17 is electrified, it generates magnetic adsorption to the driven pulley 15, so that the driven pulley 15 rotates to drive the chain wheel 12 to rotate, and drive the chain 13 to move to drive the moving support 3 to translate.
[0017] A reset motor 18 is arranged on the frame 1 and connected with the transmission shaft 14 by a pulley and a belt. After the hot rolled film is cut, the electromagnetic clutch 17 is de-energized, the electric telescopic rod 6 is retracted, and the upper pressing plate 4 and the lower pressing plate 5 are away from the hot rolled film. At this time, the reset motor 18 works to drive the chain wheel 12 to reverse, drive the chain 13 to reverse, and then drive the moving support 3 to move back to the initial position. After the moving support 3 is reset, the reset motor 18 is de-energized. An infrared sensor can be arranged on the frame 1 to detect the position of the moving support 3, so as to conveniently control the electromagnetic clutch 17, the electric telescopic rod 6 and the reset motor 18 to work. The diameters of the driving pulley 9 and the driven pulley 15 are the same. The diameter of the chain wheel 12 is the same as the diameter of the hot rolled film roll product, so that the linear speed of the chain 13 is consistent with the running speed of the hot rolled film. When cutting, the moving speed of the moving support 3 is consistent with the winding speed of the hot rolled film, the clamping effect of the pressing strips 7 and the lower pressing plate 5 on the hot rolled film is better, and the hot rolled film is not shrunk or stretched when cutting. The cutting knife 19 is detachably installed, so as to conveniently maintain or replace the cutting knife 19. An installation plate 20 is arranged on the chain 13. Threaded holes are arranged on the installation plate 20. Installation holes are arranged on the sliding blocks 10 of the moving support 3. The sliding blocks 10 are connected with the installation plate 20 by screws, so as to conveniently disassemble and maintain.
[0018] The specific implementation process is as follows:
[0019] During the heat-shrinkable film production process, the heat-shrinkable film roll passes between the upper pressure plate 4 and the lower pressure plate 5 on the movable support 3 before the take-up roller 2. The rotation of the take-up roller 2 drives the drive pulley 9 to rotate, and the drive pulley 9 drives the driven pulley 15 to idle through the synchronous belt 16. When the heat-shrinkable film thickness reaches the predetermined value, the electromagnetic clutch 17 is energized to generate magnetic attraction to the driven pulley 15, causing the driven pulley 15 to drive the transmission shaft 14 to rotate, thereby driving the movable support 3 to move horizontally towards the take-up roller 2. The horizontal movement speed of the movable support 3 is the same as the running speed of the heat-shrinkable film. At the same time, the electric telescopic rod 6 extends, driving the upper pressure plate 4 and the lower pressure plate 5 to move closer to the heat-shrinkable film. The pressure strip 7 at the lower end of the upper pressure plate 4 first connects to the heat-shrinkable film. When the heat-shrinking film is heated, the pressure strip 7 and the lower pressure plate 5 clamp the heat-shrinking film. Since the cutting blade 19 is positioned higher than the pressure strip 7, the upper pressure plate 4 continues to move downwards. The spring 8 between the pressure strip 7 and the upper pressure plate 4 is compressed, and the cutting blade 19 approaches the lower pressure plate 5 to cut the heat-shrinking film. Because the heat-shrinking film is clamped and moves synchronously during cutting, the cut edge of the heat-shrinking film will not shrink or be stretched. The moving bracket 3 delivers the cut heat-shrinking film to the take-up roller 2, which facilitates the replacement of a new take-up roller 2. After the heat-shrinking film is cut, the electromagnetic clutch 17 is de-energized, the electric telescopic rod 6 retracts, and the upper pressure plate 4 and the lower pressure plate 5 move away from the heat-shrinking film. The reset motor 18 drives the transmission shaft 14 to reverse, driving the moving bracket 3 back to the initial position. During cutting, the pressure strips 7 on both sides and the lower pressure plate 5 clamp the heat shrink film, which can ensure that the cut of the heat shrink film will not shrink. The moving bracket 3 moves at the same speed as the heat shrink film in the direction of the take-up roller 2, which can ensure that the heat shrink film will not be stretched, effectively solving the problem of shrinkage at the cut when cutting the heat shrink film.
[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A PVC heat-shrinkable film cutting device, characterized in that: The machine includes a frame, a take-up roller, a movable support, an upper pressure plate, and a lower pressure plate. The take-up roller is rotatably mounted on the frame, and the movable support is slidably mounted on the frame. The upper and lower pressure plates are slidably mounted on the movable support on both sides. The movable support is equipped with electrically operated telescopic rods that are connected to the upper and lower pressure plates respectively. Pressure strips are provided on both sides of the lower end of the upper pressure plate, and springs are provided between the pressure strips and the upper pressure plate. A cutting blade is located at the middle position of the lower end of the upper pressure plate, positioned between and parallel to the pressure strips. In the free state, the lower end face of the pressure strips is lower than the cutting blade. The roller is equipped with a drive pulley, and the movable support has sliders on both sides. The frame has a groove that cooperates with the sliders. The sliders extend out of the frame. Two sprockets are provided on each side of the frame. The sprockets are equipped with chains. The part of the slider that extends out of the frame is installed on the upper end of the chain. A drive shaft is provided at the center of the sprockets. A driven pulley coaxial with the sprocket is provided on the drive shaft near the take-up roller. The drive pulley and the driven pulley are connected by a synchronous belt. The driven pulley is rotatably connected to the drive shaft. An electromagnetic clutch is provided on the drive shaft. The electromagnetic clutch is coaxial with the driven pulley.
2. The PVC heat-shrink film cutting device according to claim 1, characterized in that: The frame is equipped with a reset motor, which is connected to the drive shaft via a pulley and a belt.
3. The PVC heat-shrink film cutting device according to claim 1, characterized in that: Infrared sensors can be installed on the frame to detect the position of the moving support.
4. The PVC heat-shrink film cutting device according to claim 1, characterized in that: The driving pulley and the driven pulley have the same diameter, and the sprocket diameter is the same as the diameter of the finished heat-shrinkable film roll.
5. The PVC heat-shrink film cutting device according to claim 1, characterized in that: The cutting blade is detachable, making it convenient to maintain or replace.
6. The PVC heat-shrink film cutting device according to claim 1, characterized in that: The chain is equipped with a mounting plate with threaded holes, and the slider of the movable bracket is equipped with mounting holes. Screws are used to connect the slider to the mounting plate.