Barrel film tensioning device for heat shrink film production

Abstract

The utility model belongs to the technical field of heat shrink film production, and discloses a drum film tensioning device for heat shrink film production, which comprises a rack, a first drum is rotatably connected to the top end in the rack, and a second drum is rotatably connected to the position, at the bottom end of the first drum, in the rack. Reels are rotationally connected to the two ends of the interior of the rack correspondingly, a first supporting base is fixedly installed at the bottom end of the interior of the rack, a lead screw is rotationally installed in the first supporting base, a handle is fixedly installed at one end of the lead screw, and a first sliding block, a second sliding block and a third sliding block are in threaded connection to the outer surface of the lead screw. And by rotating a handle, the elasticity of a spring is increased, and the problem of elastic fatigue of the spring is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat shrinkable film production technical field especially relates to a kind of for heat shrinkable film production's cylinder membrane tensioner. BACKGROUND

[0002] Heat shrinkable film is a kind of plastic film that can shrink and tightly wrap the packaged goods when heated, and is widely used in product packaging of many industries such as food, beverage, electronics, medicine, etc. In the production process of heat shrinkable film, cylinder film is a common intermediate product form, and its production quality is crucial to the performance and application effect of the final heat shrinkable film. However, uneven or inappropriate tension often occurs during the production of cylinder film, resulting in problems such as wrinkles in cylinder film, which seriously affects the quality and subsequent processing performance of cylinder film, causing material waste and production efficiency decline. SUMMARY

[0003] The utility model discloses to the problem of uneven or inappropriate tension of cylinder film in the prior art during production, which leads to problems such as wrinkles and uneven thickness of cylinder film, seriously affecting the quality and subsequent processing performance of cylinder film, causing material waste and production efficiency decline. The following technical solutions are proposed:

[0004] A cylinder film tensioner for heat shrinkable film production, comprising a rack, a first roller rotatably connected to the top end of the inside of the rack, a second roller rotatably connected to the bottom end of the inside of the rack, a reel rotatably connected to both ends of the inside of the rack, a No. 1 support seat fixedly installed at the bottom end of the inside of the rack, a lead screw rotatably installed in the inside of the No. 1 support seat, a handle fixedly installed at one end of the lead screw, a No. 1 slide block, a No. 2 slide block and a No. 3 slide block threadedly connected to the outer surface of the lead screw, a support plate slidably installed in the inside of the No. 1 support seat, a plurality of spring telescopic rods fixedly installed at the top end of the support plate, a No. 2 support seat fixedly connected between the top ends of the plurality of spring telescopic rods, the No. 2 support seat slidably installed in the inside of the No. 1 support seat, a tension roller rotatably installed in the inside of the No. 2 support seat, and the outer surface of the tension roller in contact with the outer surface of the second roller.

[0005] As a preferred embodiment of the above technical solution, two fixed blocks are fixedly installed on both sides of the inner wall of the rack at the top end of the second roller, two shafts are clamped and installed at the top end of the two fixed blocks, two cleaning cylinder brushes are movably sleeved on the outer surface of the two shafts, and a dust cover is fixedly installed on both sides of the two fixed blocks, with sawteeth provided in the inside of the dust cover.

[0006] As a preferred embodiment of the above technical solution, two clamping holes are formed at the top end of each of the two fixed blocks, and a rubber positioning sleeve is fixedly installed in each of the four clamping holes.

[0007] As a preferred embodiment of the above technical solution, connecting holes are provided on both sides of the dust cover and at the contact position with the fixing block, and a screw is threaded through the connecting hole, with a nut threaded to one end of the screw.

[0008] As a preferred embodiment of the above technical solution, the inner wall of the first support seat is provided with slide rails on both sides, and the second support seat and the support plate are slidably installed inside the slide rails.

[0009] As a preferred embodiment of the above technical solution, the bottom end of the support plate is an inclined surface, and the horizontal distance between the bottom end of the support plate and the first support seat gradually decreases from the third slider towards the handle. The horizontal distance between the highest point of the first slider and the bottom end of the frame is the smallest, the horizontal distance between the highest point of the second slider and the bottom end of the frame is greater than that of the first slider, and the horizontal distance between the highest point of the third slider and the bottom end of the frame is greater than that of the second slider.

[0010] The beneficial effects of this utility model are as follows:

[0011] (1) By setting the spring telescopic rod, the tensioning roller can tension the film on the second roller. By turning the handle, the spring elasticity is increased, thus solving the problem of spring elastic fatigue.

[0012] (2) By setting up a roller brush before the film enters the tensioning process, the surface dust is removed in a timely and effective manner, ensuring that the surface of the heat shrink film is clean and free of indentations and defects, thereby enhancing the market competitiveness of the product. Attached Figure Description

[0013] Figure 1 The diagram shown is a schematic diagram of a tubular film tensioning device for heat shrink film production in Embodiment 1;

[0014] Figure 2 The diagram shown is a schematic of the installation structure of the tension roller in Example 1;

[0015] Figure 3 The diagram shown is a schematic of the installation structure of the cleaning brush in Example 1;

[0016] Figure 4 The diagram shown is a schematic of the installation structure of the rubber positioning sleeve in Example 1.

[0017] In the diagram: 1. Frame; 2. First roller; 3. Second roller; 4. Reel; 5. Support No. 1; 6. Lead screw; 7. Handle; 8. Slider No. 1; 9. Slider No. 2; 10. Slider No. 3; 11. Support plate; 12. Spring telescopic rod; 13. Screw; 15. Support No. 2; 16. Tension roller; 17. Fixing block; 18. Rotating shaft; 19. Cleaning brush; 20. Dust cover; 21. Serrated edge; 22. Rubber positioning sleeve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0019] Example 1: This utility model provides a film tensioning device for heat shrink film production, such as... Figures 1 to 4 As shown, the system includes a frame 1, a first roller 2 rotatably connected to the top of the frame 1, a second roller 3 rotatably connected to the bottom of the first roller 2 inside the frame 1, and rollers 4 rotatably connected to both ends inside the frame 1. A first support base 5 is fixedly installed at the bottom of the frame 1. A lead screw 6 is rotatably installed inside the first support base 5. A handle 7 is fixedly installed at one end of the lead screw 6. A first slider 8, a second slider 9, and a third slider 10 are threadedly connected to the outer surface of the lead screw 6. A support plate 11 is slidably installed inside the first support base 5. Several spring telescopic rods 12 are fixedly installed at the top of the support plate 11. The tops of the several spring telescopic rods 12 are fixedly connected to the same second support base 15. The second support base 15 is slidably installed inside the first support base 5. A tension roller 16 is rotatably installed inside the second support base 15. The outer surface of the tension roller 16 is in contact with the outer surface of the second roller 3.

[0020] like Figure 3 and Figure 4 As shown, fixing blocks 17 are fixedly installed on both sides of the inner wall of the frame 1 at the top of the second roller 3. Two rotating shafts 18 are snapped onto the top of the two fixing blocks 17. Cleaning brushes 19 are movably sleeved on the outer surface of the two rotating shafts 18. Dust covers 20 are fixedly installed on both sides of the two fixing blocks 17. The dust covers 20 have serrations 21 inside. When the membrane is running on the second roller 3, the cleaning brushes 19 can wipe the upper surface of the membrane to remove residual or adsorbed dust or impurities, ensuring a cleaner membrane surface and further avoiding quality problems such as indentations caused by dust in subsequent processing. At the same time, due to inertia, the membrane drives the cleaning brushes 19 to rotate during cleaning, so that the cleaning brushes 19 come into contact with the serrations 21 on the cleaned outer surface. The serrations 21 scrape off the dust and hair on the cleaning brushes 19, which fall into the dust covers 20, preventing the cleaning brushes 19 from being unable to continue to be used due to excessive dust or hair.

[0021] like Figure 3 and Figure 4 As shown, each of the two fixing blocks 17 has two snap-fit ​​holes at its top. Each of the four snap-fit ​​holes has a rubber positioning sleeve 22 fixedly installed inside. The rubber positioning sleeve 22 makes it easier to insert the rotating shaft 18 into the snap-fit ​​hole. When disassembling the cleaning brush 19, the rotating shaft 18 can also be easily removed from the snap-fit ​​hole, which improves the convenience of replacing and cleaning the cleaning brush 19.

[0022] like Figure 3and Figure 4 As shown, connecting holes are provided on both sides of the dust cover 20 at the position where it fits against the fixing block 17. A screw 13 is threaded through the connecting holes, and a nut is threaded onto one end of the screw 13. By unscrewing the nut and pulling out the screw 13, the dust cover 20 can be easily removed from the fixing block 17, making it convenient for staff to clean the dust inside the dust cover 20.

[0023] like Figure 1 and Figure 2 As shown, slide rails are provided on both sides of the inner wall of the first support seat 5. The second support seat 15 and the support plate 11 are slidably installed inside the slide rails. The slide rails restrict the second support seat 15 and the support plate 11 to move only in a specific direction, so as to avoid the second support seat 15 and the support plate 11 from shaking or shifting, thereby enhancing the stability and reliability of the second support seat 15 and the support plate 11.

[0024] like Figure 1 and Figure 2 As shown, the bottom of the support plate 11 is an inclined surface. The horizontal distance between the bottom of the support plate 11 and the first support seat 5 gradually decreases from the third slider 10 towards the handle 7. The horizontal distance between the highest point of the first slider 8 and the bottom of the machine frame 1 is the smallest. The horizontal distance between the highest point of the second slider 9 and the bottom of the machine frame 1 is greater than that of the first slider 8. The horizontal distance between the highest point of the third slider 10 and the bottom of the machine frame 1 is greater than that of the second slider 9. By rotating the handle 7, the lead screw 6 is rotated, causing the first slider 8, the second slider 9, and the third slider 10 to move on the lead screw 6. Since the bottom of the support plate 11 is an inclined surface and the sliders have different heights, the sliders will push the support plate 11 to slide up and down inside the first support seat 5 during the movement, thereby driving the spring telescopic rod 12, the second support seat 15, and the tension roller 16 fixed on the support plate 11 to adjust their height.

[0025] Working Principle: During machine operation, the first roller 2 and the second roller 3 provide a transport path for the membrane. Guided by the first roller 2 and the second roller 3, the membrane is transported. When the membrane passes the cleaning brush 19, the cleaning brush 19 rotates due to the movement of the membrane. The cleaning brush 19 wipes the upper surface of the membrane, removing residual dust or impurities, ensuring a cleaner membrane surface and preventing quality problems caused by dust during subsequent processing. The cleaning brush 19 continues to rotate due to inertia during cleaning. The cleaned outer surface of the cleaning brush 19 contacts the serrations 21 inside the dust cover 20. The serrations 21 scrape off dust and hair from the cleaning brush 19, causing the dust to fall into the dust cover 20, preventing the cleaning brush 19 from becoming unusable due to excessive dust or hair buildup. Then, when the membrane passes the tension roller 16, the spring telescopic rod 12 squeezes the second support seat 15, causing the membrane to... The tension roller 16 squeezes the passing membrane and applies appropriate tension to it. When spring fatigue is detected, the tension roller 16 applies insufficient tension to the membrane. At this time, the handle 7 is rotated, which drives the lead screw 6 to rotate. Since the bottom ends of slider 1, slider 2, slider 9, and slider 3 are in contact with support seat 5, slider 1, slider 2, slider 9, and slider 3 move laterally towards the handle 7. Since the bottom end of support plate 11 is inclined and the highest point of slider 1, slider 2, slider 9, and slider 3 is at a different horizontal distance from the bottom of the frame 1, during their movement, slider 11 pushes support plate 11 to slide along the slide rail towards the spring within support seat 5. This increases the compressive force on the spring and the pressure transmitted to support seat 2, thereby increasing the tension applied by tension roller 16 to the membrane.

[0026] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A film tensioning device for heat shrink film production, comprising a frame (1), wherein a first roller (2) is rotatably connected to the top of the frame (1), a second roller (3) is rotatably connected to the bottom of the first roller (2) inside the frame (1), and a roller (4) is rotatably connected to both ends inside the frame (1), and a support base (5) is fixedly installed at the bottom of the frame (1), characterized in that, A lead screw (6) is rotatably installed inside the first support base (5). A handle (7) is fixedly installed at one end of the lead screw (6). A first slider (8), a second slider (9), and a third slider (10) are threadedly connected to the outer surface of the lead screw (6). A support plate (11) is slidably installed inside the first support base (5). Several spring telescopic rods (12) are fixedly installed at the top of the support plate (11). The tops of the several spring telescopic rods (12) are fixedly connected to the same second support base (15). The second support base (15) is slidably installed inside the first support base (5). A tension roller (16) is rotatably installed inside the second support base (15). The outer surface of the tension roller (16) is in contact with the outer surface of the second roller (3).

2. The tubular film tensioning device for heat shrink film production according to claim 1, characterized in that, Fixing blocks (17) are fixedly installed on both sides of the inner wall of the frame (1) at the top of the second roller (3). Two rotating shafts (18) are snapped onto the top of the two fixing blocks (17). Cleaning brushes (19) are movably sleeved on the outer surface of the two rotating shafts (18). Dust covers (20) are fixedly installed on both sides of the two fixing blocks (17). The dust covers (20) have serrations (21) inside.

3. The tubular film tensioning device for heat shrink film production according to claim 2, characterized in that, Two snap-fit ​​holes are provided at the top of each of the two fixing blocks (17), and rubber positioning sleeves (22) are fixedly installed inside each of the four snap-fit ​​holes.

4. The tubular film tensioning device for heat shrink film production according to claim 2, characterized in that, The dust cover (20) has connecting holes on both sides and at the contact position with the fixing block (17). A screw (13) is connected through the connecting hole, and a nut is threaded to one end of the screw.

5. The tubular film tensioning device for heat shrink film production according to claim 1, characterized in that, The first support seat (5) has slides on both sides of its inner wall, and the second support seat (15) and the support plate (11) are slidably installed inside the slides.

6. The tubular film tensioning device for heat shrink film production according to claim 1, characterized in that, The bottom of the support plate (11) is an inclined surface. The horizontal distance between the bottom of the support plate (11) and the first support seat (5) gradually decreases from the third slider (10) towards the handle (7). The horizontal distance between the highest point of the first slider and the bottom of the frame (1) is the smallest. The horizontal distance between the highest point of the second slider (9) and the bottom of the frame (1) is greater than that between the first slider (8). The horizontal distance between the highest point of the third slider (10) and the bottom of the frame (1) is greater than that between the second slider (9).

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