Film drawing device for PVC (polyvinyl chloride) film roll

Abstract

The invention belongs to the technical field of film rolling and drawing, and particularly relates to a PVC film rolling and drawing device which comprises a machine body, a rolling assembly and a stretching assembly, a first roller shaft is rotationally installed on the machine body and used for containing an unstretched PVC film, and the stretching assembly comprises three first sliding groove plates fixedly installed on the machine body; the first sliding block is installed on the first sliding groove plate in a sliding mode. The second roller shaft and the fourth roller shaft are rotationally installed on the two first sliding blocks respectively, and the second roller shaft is close to the first roller shaft; the third roller shaft is mounted on the rest first sliding block; the first cavity and the second cavity are formed in the second roller shaft and the third roller shaft respectively; the ventilation pipe is fixedly arranged on the machine body; the notch is formed in the third roller shaft, and the second cavity is communicated with outside air through the notch; and by arranging the second roller shaft, the third roller shaft and the fourth roller shaft which can slide, the thin film does not need to be pulled to vertically penetrate through the roller shafts in the installation process, and the installation steps are simplified.

Description

Technical Field

[0001] The invention belongs to the field of film rolling and stretching devices, in particular to a PVC film film rolling and stretching device. Background Art

[0002] PVC film is used in many industries, such as packaging and advertising. Its production process is to heat and melt the PVC raw materials, extrude it into film through an extruder, and then make it into a finished product through processes such as cooling, shaping, stretching and cutting. During the stretching process, a film rolling device is required to stretch the PVC film. PVC films of different thicknesses can be produced to meet different production needs.

[0003] A patent application with publication number CN118322536A discloses a film stretching machine, including a unwinding mechanism, and also includes: a film stretching mechanism for stretching the film; a film winding mechanism for winding the stretched film; the film stretching mechanism includes a stretching frame, a first stretching roller and a second stretching roller, the first stretching roller and the second stretching roller are active stretching rollers; the film is wound in an S shape on the first stretching roller and the second stretching roller, and by setting the rotation speeds of the first stretching roller and the second stretching roller to be different, a thick film is stretched into a thin film.

[0004] When using the above solution, one end of the PVC film needs to be pulled through the film pressing roller, the first stretching roller, the second stretching roller and other rollers in sequence. Some rollers are located above the PVC film, and some rollers are located below the PVC film. The installation of the film is relatively complicated and the operation is inconvenient. At the same time, the PVC film can only be heated for a period of time after installation, and then the stretching action can be performed after heating, which is relatively time-consuming.

[0005] To this end, the present invention provides a PVC film rolling and stretching device. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a PVC film rolling and stretching device described in the present invention includes a machine body, a winding assembly and a stretching assembly, a No. 1 roller is rotatably installed on the machine body, the No. 1 roller is used to place the unstretched PVC film, the winding assembly includes a No. 5 roller, and the stretching assembly includes: three No. 1 slide plates fixedly installed on the machine body; a No. 1 slider slidably installed on the No. 1 slide plate; a No. 2 roller and a No. 4 roller respectively rotatably installed on two of the No. 1 sliders, the No. 2 roller is close to the No. 1 roller, and the No. 4 roller is close to the winding assembly; a No. 3 roller installed on the remaining No. 1 slider Roller, the No. 3 roller is located between the No. 2 roller and the No. 4 roller, the PVC film is wound in a wave shape on the No. 2 roller, the No. 3 roller and the No. 4 roller, and when working, the rotation speed of the No. 2 roller is lower than the rotation speed of the No. 4 roller to achieve the stretching of the PVC film; the No. 1 cavity and the No. 2 cavity are respectively provided on the No. 2 roller and the No. 3 roller; a ventilation pipe is fixedly installed on the machine body, and the ventilation pipe is used to supply hot air to the No. 1 cavity and the No. 2 cavity, so that the No. 2 roller and the No. 3 roller heat the PVC film; a notch is provided on the No. 3 roller, and the No. 2 cavity is communicated with the outside air through the notch.

[0008] Preferably, the third roller is rotatably connected to the first slider, and the rotation of the third roller can change the direction of the notch.

[0009] Preferably, the stretching assembly further comprises: a rack plate No. 1 fixedly mounted on the slide plate No. 1 on which the roller No. 3 is mounted; a gear No. 1 fixedly mounted on the roller No. 3, the rack plate No. 1 being meshedly connected with the gear No. 1.

[0010] Preferably, the stretching assembly also includes: a blocking plate fixedly mounted on the No. 1 slider, the blocking plate being used to block the gap of the No. 2 cavity; a groove provided on the No. 3 roller and located on both sides of the gap; and an insert block slidably mounted on the blocking plate, the sharp end of the insert block being able to be inserted into the groove.

[0011] Preferably, the stretching assembly also includes: two connecting pipes rotatably mounted on the No. 1 roller and the No. 2 roller, respectively, the connecting pipes being connected to the No. 1 cavity and the No. 2 cavity, respectively; a circular ring rotatably mounted on the ventilation pipe, the circular ring having two through holes, the connecting pipes being connected to the through holes, a No. 1 belt being installed between the circular ring and the No. 3 roller; and a baffle fixedly mounted on the ventilation pipe, the baffle being used to block the through hole connected to the No. 2 cavity.

[0012] Preferably, the stretching assembly also includes: a No. 2 slide plate fixedly mounted on the machine body, a No. 2 slider being mounted on the No. 2 slide plate; a No. 6 roller rotatably mounted on the No. 2 slider, a No. 3 cavity being provided on the No. 6 roller; a lighting lamp fixedly mounted on the machine body; and a light sensor fixedly mounted below the lighting lamp, the light sensor and the lighting lamp being located on both sides of the film respectively, the light sensor being used to detect the transmittance of the film and to control the rotation speed of the No. 6 roller according to the transmittance.

[0013] Preferably, a cleaning assembly is further included, which includes: two No. 1 connecting plates fixedly mounted on the machine body, the two No. 1 connecting plates being respectively mounted below the No. 2 roller and above the No. 3 roller; two round rods rotatably mounted on the No. 1 connecting plate, a wiping cloth being wound on the round rod, and the two ends of the wiping cloth being respectively connected to the two round rods; a push rod mounted on the No. 1 connecting plate, the push rod being used to stick the wiping cloth to the surface of the film.

[0014] Preferably, the support rod adopts an up and down telescopic structure.

[0015] Preferably, the winding assembly includes: a telescopic rod fixedly mounted on the machine body; a No. 2 connecting plate fixedly mounted on one end of the telescopic rod; a circular plate rotatably mounted on the No. 2 connecting plate, and the circular plate is movably connected to the No. 5 roller shaft and the circular plate.

[0016] Preferably, the cleaning assembly also includes: a No. 4 gear for driving the round rod to rotate, the No. 4 gear is fixedly connected to the round rod, and a No. 2 belt is installed between the No. 4 gears on two adjacent connecting plates; a No. 3 gear for driving the No. 4 gear to rotate, a No. 3 belt is installed between the No. 3 gear and the No. 4 gear, and the No. 3 gear is rotatably installed on the machine body; a No. 2 gear for driving the No. 3 gear to rotate intermittently, the No. 2 gear is fixedly connected to the circular plate, and the No. 2 gear is meshed with the No. 3 gear.

[0017] The beneficial effects of the present invention are as follows: 1. The PVC film rolling and stretching device described in the present invention provides a slidable roller No. 2, roller No. 3 and roller No. 4. During installation, there is no need to pull the film up and down to pass through this part of the rollers, which simplifies the installation steps. In conjunction with the notch of the No. 3 roller, the PVC film is heated during the installation process. Compared with the operation of heating after the installation is completed, the waiting time for heating is reduced and the production efficiency is improved. In conjunction with the No. 1 rack plate and the No. 1 gear, during installation, the No. 3 roller rotates to change the direction of the airflow, so as to achieve uniform heating of the PVC film between the No. 2 roller and the No. 4 roller, thereby ensuring the stretching effect of the PVC film within this range.

[0018] 2. The PVC film rolling and stretching device described in the present invention emits a light beam through a lighting lamp. The light beam passes through the film and is sensed by the light sensor rod to determine the light transmittance of the film. According to the thickness requirement of the film, the test result is compared with the qualified film test result. According to the difference between the two, it is controlled whether the sixth roller is accelerated to perform secondary stretching on the film, which further ensures the stretching effect of the film. In conjunction with the cleaning component, the upper and lower surfaces of the film are cleaned, and the dust and white frost on the surface of the film can be wiped off to avoid the problem of dust and white frost affecting the light transmittance of the film, thereby ensuring the stretching effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 is a perspective view of embodiment 1 of the present invention; Figure 2 It is the left side view of the body; Figure 3 Schematic diagram of the positions of the first roller and the second roller of the present invention; Figure 4 This is a schematic diagram of the position of the fourth roller of the present invention; Figure 5 is a cross-sectional view of the third roller and the second roller of the present invention; Figure 6 Schematic diagram of the position of the groove of the present invention; Figure 7 It is a structural schematic diagram of the ring of the present invention; Figure 8 It is a structural schematic diagram of the round rod of the present invention; In the figure: 1. Machine body; 2. Winding assembly; 21. Roller No. 5; 22. Telescopic rod; 23. Circular plate; 3. Stretching assembly; 31. Slide plate No. 1; 32. Slider No. 1; 33. Roller No. 2; 34. Roller No. 4; 35. Roller No. 3; 36. Cavity No. 1; 37. Cavity No. 2; 38. Ventilation pipe; 39. Notch; 310. Rack plate No. 1; 311. Gear No. 1; 312. Blocking plate; 313. Groove; 314. Insert; 315. Connector Adapter; 316. Ring; 317. Through hole; 318. Belt No. 1; 319. Baffle; 320. Slide plate No. 2; 321. Roller No. 6; 322. Slider No. 2; 324. Light; 325. Light sensor; 4. Roller No. 1; 5. Cleaning assembly; 51. Connecting plate No. 1; 52. Round rod; 53. Wiping cloth; 54. Push rod; 55. Gear No. 4; 56. Belt No. 2; 57. Gear No. 3; 58. Belt No. 3; 59. Gear No. 2. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1-8 As shown, a PVC film rolling and stretching device described in an embodiment of the present invention includes a body 1, a winding component 2 and a stretching component 3, a No. 1 roller 4 is rotatably installed on the body 1, the No. 1 roller 4 is used to place unstretched PVC film, the winding component 2 includes a No. 5 roller 21, and the stretching component 3 includes: three No. 1 slide plates 31 fixedly installed on the body 1; a No. 1 slider 32 slidably installed on the No. 1 slide plate 31; a No. 2 roller 33 and a No. 4 roller 34 rotatably installed on two of the No. 1 sliders 32, the No. 2 roller 33 is close to the No. 1 roller 4, and the No. 4 roller 34 is close to the winding component 2; a No. 3 roller 35 is installed on the remaining No. 1 slider 32, and the No. 3 roller 35 is located at In the middle of the No. 2 roller 33 and the No. 4 roller 34, the PVC film is wound in a wave shape on the No. 2 roller 33, the No. 3 roller 35 and the No. 4 roller 34. When working, the rotation speed of the No. 2 roller 33 is lower than the rotation speed of the No. 4 roller 34 to achieve the stretching of the PVC film; the No. 1 cavity 36 and the No. 2 cavity 37 are respectively provided on the No. 2 roller 33 and the No. 3 roller 35; the ventilation pipe 38 is fixedly installed on the body 1, and the ventilation pipe 38 is used to supply hot air to the No. 1 cavity 36 and the No. 2 cavity 37, so that the No. 2 roller 33 and the No. 3 roller 35 heat the PVC film; a notch 39 is provided on the No. 3 roller 35, and the No. 2 cavity 37 is communicated with the outside air through the notch 39.

[0023] Specifically, when installing a long PVC film, it needs to be rolled into a cylindrical shape, and then one end of the PVC film needs to be pulled through the second roller 33, the third roller 35, and the fourth roller 34 in sequence, with the second roller 33 and the fourth roller 34 located above the PVC film and the third roller 35 located below the PVC film. The installation of the film is relatively complicated and inconvenient to operate. At the same time, the PVC film can only be heated for a period of time after installation, and then stretched after heating, which is relatively time-consuming. In the initial state, the second roller 33 and the fourth roller 34 are located above the first roller 4, and the third roller 35 is located below with the notch 39 facing upwards. Before installation, the ventilation pipe 38 is connected to the second cavity 37, and hot air flows out from the notch 39 of the third roller 35. During installation, the unstretched PVC film is wound around the first roller 4, and the end of the PVC film is pulled so that it passes through the second roller 33, the third roller 35 and the fourth roller 34 in sequence. At this time, the hot air blows towards the PVC film between the fourth roller 34 and the second roller 33. The PVC film of this section is heated and gradually softened. At the same time, the end of the PVC film is fixedly mounted on the fifth roller 21. Then, the first slider 32 is controlled to slide up and down. The sliding of the first slider 32 drives the second roller 33 and the fourth roller 34 to move downward, and the third roller 35 moves upward until the second roller 33 and the fourth roller 34 are located below the first roller 4 and the third roller 35 is located above, so that the PVC film is in a wavy winding shape. The first slider 32 slides while controlling the rotation of the first roller 4 to To adapt to the change in the length of the PVC film between the No. 1 roller 4 and the No. 5 roller 21, the PVC film is in a taut state. While the No. 1 slider 32 slides, hot air is supplied to the No. 1 cavity 36 through the ventilation pipe 38. The hot air flows out from the notch 39 of the No. 3 roller 35 to heat the PVC film. After the No. 1 slider 32 finishes sliding, the No. 4 roller 34 and the No. 2 roller 33 are controlled to rotate. The rotation speeds of the No. 4 roller 34 and the No. 2 roller 33 are different, so that the PVC film is gradually stretched. At the same time, the No. 5 roller 21 and Roller No. 1 4 rotates to reel in the stretched PVC film and supply the remaining unstretched PVC film to the stretching assembly 3, ensuring production continuity; by setting up slidable roller No. 2 33, roller No. 35 and roller No. 4 34, there is no need to pull the film up and down through this part of the rollers during installation, which simplifies the installation steps. In conjunction with the notch 39 of roller No. 35, the PVC film is heated during the installation process. Compared with the heating operation after the installation is completed, the waiting time for heating is reduced, thereby improving production efficiency.

[0024] like Figure 2 and Figure 6 As shown, the third roller 35 is rotatably connected to the first slider 32 , and the rotation of the third roller 35 can change the direction of the notch 39 .

[0025] Specifically, by setting the third roller 35 to be rotatable, the direction of the notch 39 of the third roller 35 can be changed during the rotation process, so that the direction of the airflow is changed, so as to achieve uniform heating of the PVC film between the second roller 33 and the fourth roller 34, thereby ensuring the stretching effect of the PVC film within this range.

[0026] like Figure 1 、 Figure 3 and Figure 5 As shown, the stretching assembly 3 also includes: a No. 1 rack plate 310 fixedly mounted on the No. 1 slide plate 31 on which the No. 3 roller 35 is mounted; a No. 1 gear 311 fixedly mounted on the No. 3 roller 35, and the No. 1 rack plate 310 is meshedly connected with the No. 1 gear 311.

[0027] Specifically, since the No. 1 rack plate 310 is engaged with the No. 1 gear 311, the No. 1 gear 311 rotates as the No. 1 slider 32 moves up and down. The rotation of the No. 1 gear 311 drives the No. 3 roller 35 and the notch 39 to rotate synchronously, so as to achieve uniform heating of the PVC film.

[0028] like Figure 1 、 Figure 5 and Figure 6 As shown, the stretching assembly 3 also includes: a blocking plate 312 fixedly mounted on the No. 1 slider 32, the blocking plate 312 is used to block the gap 39 of the No. 2 cavity 37; a groove 313 provided on the No. 3 roller 35 and located on both sides of the gap 39; an insert block 314 slidably mounted on the blocking plate 312, the sharp end of the insert block 314 can be inserted into the groove 313.

[0029] When the cam 314 is in the closed position, the spring 314 is in the closed position, and the spring 314 is in the open position, so that the cam 314 can be opened and closed by the spring 314 when the cam 314 is in the open position.

[0030] like Figure 1 、 Figure 3 、 Figure 5 and Figure 7As shown, the stretching assembly 3 also includes: two connecting pipes 315 rotatably mounted on the No. 1 roller 4 and the No. 2 roller 33, respectively, and the connecting pipes 315 are connected to the No. 1 cavity 36 and the No. 2 cavity 37 respectively; a circular ring 316 rotatably mounted on the ventilation pipe 38, and the circular ring 316 is provided with two through holes 317, the connecting pipe 315 is connected to the through holes 317, and a No. 1 belt 318 is installed between the circular ring 316 and the No. 3 roller 35; a baffle 319 fixedly mounted on the ventilation pipe 38, and the baffle 319 is used to block the through hole 317 connected to the No. 2 cavity 37.

[0031] Specifically, in the initial state, the baffle 319 blocks the through hole 317 connected to the No. 1 cavity 36, and the hot air can only flow into the No. 2 cavity 37. While the No. 1 gear 311 rotates, the No. 1 belt 318 drives the ring 316 to rotate synchronously, and the rotation of the ring 316 drives the through hole 317 to rotate. Therefore, the through hole 317 connected to the No. 1 cavity 36 gradually rotates out of the blocking range of the baffle 319, allowing part of the air flow to enter the No. 1 cavity 36. In this process, the No. 3 roller 35 gradually approaches the film, and the block gradually blocks the gap 39. The air flow enters the No. 1 cavity 36, which can reduce the air flow entering the No. 2 cavity 37 and reduce the air flow rate at the gap 39, avoiding the problem of excessive air flow rate acting on the surface of the film, causing film deformation, and affecting subsequent stretching actions.

[0032] like Figure 1 、 Figure 2 and Figure 4 As shown, the stretching component 3 also includes: a No. 2 slide plate 320 fixedly mounted on the body 1, and a No. 2 slider 322 is mounted on the No. 2 slide plate 320; a No. 6 roller 321 rotatably mounted on the No. 2 slider 322, and a No. 3 cavity is opened on the No. 6 roller 321; a lighting lamp 324 fixedly mounted on the body 1; and a light sensor 325 fixedly mounted below the lighting lamp 324, the light sensor 325 and the lighting lamp 324 are respectively located on both sides of the film, and the light sensor 325 is used to detect the transmittance of the film and control the rotation speed of the No. 6 roller 321 according to the transmittance.

[0033] Specifically, the lighting lamp 324 can be a lamp that can emit infrared light beams, the light sensor 325 can sense the energy of infrared light and convert it into an electrical signal, and cold air can be introduced into the No. 3 cavity to facilitate the cooling and shaping of the film. In the initial state, the rotation speed of the No. 6 roller 321 is the same as that of the No. 4 roller 34. During operation, a light beam is emitted by the lighting lamp 324, and the light beam passes through the film and is sensed by the light sensor 325 rod to determine the transmittance of the film. According to the thickness requirement of the film, the test result is compared with the qualified film test result. According to the difference between the two, whether the No. 6 roller 321 is accelerated is controlled to perform secondary stretching on the film, thereby further ensuring the stretching effect of the film.

[0034] like Figure 1 、 Figure 3 and Figure 8 As shown, it also includes a cleaning component 5, which includes: two No. 1 connecting plates 51 fixedly mounted on the body 1, and the two No. 1 connecting plates 51 are respectively mounted below the No. 2 roller 33 and above the No. 3 roller 35; two round rods 52 rotatably mounted on the No. 1 connecting plate 51, and a wiping cloth 53 is wound on the round rod 52, and the two ends of the wiping cloth 53 are respectively connected to the two round rods 52; a push rod 54 mounted on the No. 1 connecting plate 51, and the push rod 54 is used to stick the wiping cloth 53 to the surface of the film.

[0035] Specifically, during the processing of PVC, heat stabilizers must be added. Many heat stabilizers not only have a stabilizing effect, but also have a certain lubricating effect, such as (powder) barium stearate and cadmium stearate. If the compatibility of these materials is poor, precipitation will occur during the production of stretch film, that is, a layer of white frost will be produced on the surface of the film. During use, the push rod 54 allows the wiping cloth 53 to contact the surface of the film, which can wipe off the dust and white frost on the surface of the film to avoid the problem of dust and white frost affecting the transmittance of the film, thereby ensuring the stretching effect.

[0036] like Figure 8 As shown, the support rod 54 adopts an up and down telescopic structure.

[0037] Specifically, a telescopic structure is provided to accommodate the up and down sliding of the second roller 33 and the third roller 35 during installation, so that the wiping cloth 53 can always be in contact with the film.

[0038] like Figure 1 、 Figure 2 and Figure 3 As shown, the winding assembly 2 includes: a telescopic rod 22 fixedly mounted on the body 1; a No. 2 connecting plate fixedly mounted on one end of the telescopic rod 22; a circular plate 23 rotatably mounted on the No. 2 connecting plate, and the circular plate 23 is movably connected to the No. 5 roller 21 and the circular plate 23.

[0039] Specifically, in the initial state, the telescopic rod 22 is in an extended state, and one end of the film on the fifth roller 21 is close to the side of the fourth roller 34. After the stretching begins, the telescopic rod 22 contracts, so that the fifth roller 21 moves away from the fourth roller 34. Until the fifth roller 21 is located on the side of the sixth roller 321, the second slider 322 is controlled to drive the sixth roller 321 to move upward, and the round block is controlled to rotate to drive the sixth roller 321 to rotate synchronously to rewind the stretched film; when the existing device is installed, there is a distance between the winding assembly and the stretching assembly 3, and the film within this distance cannot be stretched by the stretching assembly 3. By setting the telescopic rod 22, every part of the film can be stretched by the stretching assembly 3.

[0040] like Figure 2 and Figure 3 As shown, the cleaning assembly 5 also includes: a No. 4 gear 55 for driving the round rod 52 to rotate, the No. 4 gear 55 is fixedly connected to the round rod 52, and a No. 2 belt 56 is installed between the No. 4 gear 55 on the two adjacent connecting plates; a No. 3 gear 57 for driving the No. 4 gear 55 to rotate, a No. 3 belt 58 is installed between the No. 3 gear 57 and the No. 4 gear 55, and the No. 3 gear 57 is rotatably installed on the body 1; a No. 2 gear 59 for driving the No. 3 gear 57 to rotate intermittently, the No. 2 gear 59 is fixedly connected to the circular plate 23, and the No. 2 gear 59 is meshed with the No. 3 gear 57.

[0041] Specifically, after the telescopic rod 22 drives the fifth roller 21 to move to the side of the sixth roller 321 away from the first roller 4, the second gear 59 is engaged with the third gear 57. When the round block is wound around the stretched PVC film, the second gear 59 rotates synchronously. The rotation of the second gear 59 drives the third gear 57 to rotate intermittently. The third gear 57 drives the fourth gear 55 to rotate synchronously through the third belt 58. The rotation of the fourth gear causes the round rod 52 to rotate. The rotation of the round rod 52 causes the used part of the wiping cloth 53 to be wound around one round rod 52. The clean wiping cloth 53 on the other round rod 52 moves to contact the film to wipe and clean the film.

[0042] Working principle: In the initial state, the No. 2 roller 33 and the No. 4 roller 34 are located above the No. 1 roller 4, and the No. 3 roller 35 is located below with the notch 39 facing upwards. Before installation, the ventilation pipe 38 is connected to the No. 2 cavity 37, and the hot air flows out from the notch 39 of the No. 3 roller 35. During installation, the unstretched PVC film is wound and installed on the No. 1 roller 4, and the end of the PVC film is pulled to pass through the No. 2 roller 33, the No. 3 roller 35 and the No. 4 roller 34 in turn. At this time, the hot air blows to the PVC film between the No. 4 roller 34 and the No. 2 roller 33, heating the PVC film in this section, and the PVC film gradually softens. At the same time, the end of the PVC film is installed on the No. 5 roller 21, and then the No. 1 slider 32 is controlled to slide up and down. The sliding of the No. 1 slider 32 drives the No. 2 roller 33 and the No. 4 roller 34 to move downward, and the No. 3 roller 35 to move upward, until the No. 2 roller 33 and the No. 4 roller 34 are located below the No. 1 roller 4 and the No. 3 roller 35 is located above, so that the PVC film is in a wavy winding form. The No. 1 slider 32 controls the No. 1 roller 4 to rotate while sliding to adapt to the change in the length of the PVC film between the No. 1 roller 4 and the No. 5 roller 21. At this time, the PVC film is in a taut state. The No. 1 slider 32 slides while supplying hot air to the No. 1 cavity 36 through the ventilation pipe 38. The hot air flows out from the notch 39 of the No. 3 roller 35 to heat the PVC film. Since the No. 1 rack plate 310 is engaged with the No. 1 gear 311, the No. 1 gear 31 As the No. 1 slider 32 moves up and down, the No. 1 gear 311 rotates. The rotation of the No. 1 gear 311 drives the No. 3 roller 35 and the notch 39 to rotate synchronously, thereby achieving uniform heating of the PVC film between the No. 2 roller 33 and the No. 4 roller 34. As the No. 1 gear 311 rotates, the No. 1 belt 318 drives the ring 316 to rotate synchronously. The rotation of the ring 316 drives the through hole 317 to rotate. Therefore, the through hole 317 connected to the No. 1 cavity 36 gradually rotates out of the blocking range of the baffle 319, allowing part of the air flow to enter the No. 1 cavity 36 to preheat the subsequent film. After the No. 1 slider 32 finishes sliding, the No. 4 roller 34 and the No. 2 roller 33 are controlled to rotate. The rotation of the No. 4 roller 34 and the No. 2 roller 33 The different speeds make the PVC film gradually stretched, and the telescopic rod 22 is controlled to contract, so that the fifth roller 21 is away from the fourth roller 34. After the fifth roller 21 is located on the side of the sixth roller 321, the second slider 322 is controlled to drive the sixth roller 321 to move up, and the round block is controlled to rotate to drive the sixth roller 321 to rotate synchronously to rewind the stretched film. At the same time, the first roller 4 is controlled to rotate to supply the remaining unstretched PVC film to the stretching assembly 3 to ensure production continuity. After the sixth roller 321 moves up, the lighting lamp 324 and the light sensor 325 are controlled to start. The lighting lamp 324 emits a light beam, which passes through the film and is sensed by the light sensor 325 rod to judge the light transmittance of the film. According to the thickness requirement of the film,The test results are compared with the qualified film test results. According to the difference between the two, whether the sixth roller 321 is accelerated is controlled to perform secondary stretching on the film, thereby further ensuring the stretching effect of the film.

[0043] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A PVC film rolling and stretching device, comprising a machine body (1), a winding assembly (2) and a stretching assembly (3), wherein a No. 1 roller (4) is rotatably mounted on the machine body (1), the No. 1 roller (4) being used to place unstretched PVC film, the winding assembly (2) comprising a No. 5 roller (21), and characterized in that: The stretching assembly (3) comprises: Three No. 1 slide plates (31) fixedly mounted on the machine body (1); A first sliding block (32) slidably mounted on the first sliding groove plate (31); The second roller (33) and the fourth roller (34) mounted on two of the first sliders (32) are rotated respectively, the second roller (33) being close to the first roller (4), and the fourth roller (34) being close to the winding assembly (2); A third roller (35) is mounted on the remaining first slider (32), the third roller (35) being located between the second roller (33) and the fourth roller (34), and the PVC film is wound in a wave shape on the second roller (33), the third roller (35) and the fourth roller (34). When in operation, the rotation speed of the second roller (33) is lower than that of the fourth roller (34), so as to achieve stretching of the PVC film; A first cavity (36) and a second cavity (37) are respectively provided on the second roller (33) and the third roller (35); a ventilation pipe (38) fixedly mounted on the machine body (1), the ventilation pipe (38) being used to supply hot air into the first cavity (36) and the second cavity (37), so that the second roller (33) and the third roller (35) heat the PVC film; A notch (39) is provided on the third roller shaft (35), and the second cavity (37) is communicated with the outside air through the notch (39).

2. A PVC film roll and film stretching device according to claim 1, characterized in that: The third roller (35) is rotatably connected to the first slider (32), and the rotation of the third roller (35) can change the orientation of the notch (39).

3. A PVC film roll and film stretching device according to claim 2, characterized in that: The stretching assembly (3) further comprises: A number one rack plate (310) fixedly mounted on the number one chute plate (31) on which the number three roller shaft (35) is mounted; A number one gear (311) is fixedly mounted on the number three roller shaft (35), and the number one rack plate (310) is meshedly connected with the number one gear (311).

4. A PVC film roll and film stretching device according to claim 3, characterized in that: The stretching assembly (3) further comprises: a blocking plate (312) fixedly mounted on the first slider (32), the blocking plate (312) being used to block the notch (39) of the second cavity (37); Grooves (313) formed on the third roller (35) and located on both sides of the notch (39); An insert block (314) is slidably mounted on the blocking plate (312), and a sharp point of the insert block (314) can be inserted into the groove (313).

5. A PVC film rolling and stretching device according to claim 4, characterized in that: The stretching assembly (3) further comprises: Two connecting pipes (315) rotatably mounted on the first roller (4) and the second roller (33), respectively, the connecting pipes (315) being in communication with the first cavity (36) and the second cavity (37), respectively; A circular ring (316) is rotatably mounted on the ventilation pipe (38), wherein two through holes (317) are formed on the circular ring (316), the connecting pipe (315) is connected to the through holes (317), and a belt (318) is installed between the circular ring (316) and the third roller (35); A baffle (319) is fixedly mounted on the ventilation pipe (38), and the baffle (319) is used to shield the through hole (317) communicating with the second cavity (37).

6. A PVC film rolling and stretching device according to claim 5, characterized in that: The stretching assembly (3) further comprises: A second chute plate (320) fixedly mounted on the machine body (1), wherein a second slider (322) is mounted on the second chute plate (320); A sixth roller shaft (321) is rotatably mounted on the second slider (322), wherein the sixth roller shaft (321) is provided with a third cavity; a lighting lamp (324) fixedly mounted on the machine body (1); A light sensor (325) is fixedly mounted below the lighting lamp (324). The light sensor (325) and the lighting lamp (324) are located on both sides of the film, respectively. The light sensor (325) is used to detect the light transmittance of the film and control the rotation speed of the sixth roller (321) according to the light transmittance.

7. A PVC film rolling and stretching device according to claim 6, characterized in that: It also includes a cleaning component (5), which includes: Two No. 1 connecting plates (51) fixedly mounted on the machine body (1), the two No. 1 connecting plates (51) being mounted below the No. 2 roller (33) and above the No. 3 roller (35) respectively; Two round rods (52) are rotatably mounted on the first connecting plate (51), a wiping cloth (53) is wound around the round rods (52), and two ends of the wiping cloth (53) are respectively connected to the two round rods (52); A push rod (54) is mounted on the first connecting plate (51), and the push rod (54) is used to stick the wiping cloth (53) to the surface of the film.

8. A PVC film rolling and stretching device according to claim 7, characterized in that: The support rod (54) adopts an up-and-down telescopic structure.

9. A PVC film rolling and stretching device according to claim 8, characterized in that: The winding assembly (2) comprises: A telescopic rod (22) fixedly mounted on the machine body (1); A second connecting plate fixedly mounted on one end of the telescopic rod (22); The circular plate (23) mounted on the second connecting plate is rotatably connected to the circular plate (23), the fifth roller shaft (21) and the circular plate (23).

10. A PVC film rolling and stretching device according to claim 9, characterized in that: The cleaning component (5) further comprises: A fourth gear (55) for driving the round rod (52) to rotate, the fourth gear (55) being fixedly connected to the round rod (52), and a second belt (56) being installed between the fourth gears (55) on two adjacent connecting plates; A third gear (57) for driving the fourth gear (55) to rotate, a third belt (58) being installed between the third gear (57) and the fourth gear (55), and the third gear (57) being rotatably mounted on the machine body (1); A second gear (59) is used to drive the third gear (57) to rotate intermittently, the second gear (59) is fixedly connected to the circular plate (23), and the second gear (59) is meshedly connected to the third gear (57).

Images