Membrane double-sided heating equipment for membrane drawing machine and membrane drawing machine
By setting up upper and lower heating rollers and an adjustable limit roller group on the film stretching machine, uniform heating of both sides of the film can be achieved, which solves the temperature difference problem caused by traditional single-sided heating, improves film quality and production efficiency, and reduces energy consumption and adjustment costs.
Patent Information
- Application Number
- CN202511535928.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2025-12-12
AI Technical Summary
Traditional film stretching machines use a single-sided heating method, which results in a large temperature difference between the front and back of the film, causing local overheating and affecting the optical performance of the film. In addition, the equipment cannot flexibly adapt to changes in film thickness, resulting in high energy consumption and low efficiency.
The system employs two heating rollers, one above the other, to simultaneously contact the front and back sides of the diaphragm. The distance between the movable roller and the positioning roller of the limiting roller group is adjustable. Combined with the locking structure of the slide and the pressure bar, it achieves uniform heating of both sides of the diaphragm. The lifting mechanism and braking structure further enhance the flexibility and production efficiency of the equipment.
This solves the problem of uneven heating of the diaphragm, improves the quality of film stretching and forming, reduces equipment adjustment costs, increases production efficiency, prevents impurities from entering, and ensures diaphragm quality.
Smart Images
Figure CN121105264A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of film drawing machines, in particular to a film double-sided heating device for a film drawing machine and the film drawing machine. BACKGROUND
[0002] Laminated glass is composed of two layers of glass and a film located between the two layers of glass for bonding the glass, and the film needs to be heated during the film drawing process to soften it for stretching and forming.
[0003] Traditional film drawing machines use single-sided heating, which results in uneven heating of the front and back surfaces of the film, leading to a large temperature difference between the two surfaces. Local overheating can cause the optical performance of the film to decline. Single-sided heating requires longer heating time or higher temperature compensation, resulting in high energy consumption and low efficiency. In addition, the spacing between the limiting roller groups in traditional equipment is fixed and cannot be flexibly adapted to changes in film thickness. Therefore, we propose a film double-sided heating device for a film drawing machine and the film drawing machine. SUMMARY
[0004] The present application aims to provide a film double-sided heating device for a film drawing machine and the film drawing machine to solve the problems raised in the background art.
[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a film double-sided heating device for a film drawing machine, arranged inside a containing bin, comprising two heating rollers and two sets of limiting roller groups, the two heating rollers are arranged above and below respectively, and the two heating rollers can contact the front and back surfaces of the film respectively; the limiting roller group comprises a movable roller, a sliding seat rotatably connected with the movable roller, a guide rod and a stop bar fixedly installed on the inner wall of the containing bin, and a positioning roller rotatably connected with the containing bin, a gap for passing through the film is provided between the movable roller and the positioning roller, and a sliding groove for accommodating the sliding seat is formed in the inner wall of the containing bin; a pressing strip is slidably arranged on the surface of the guide rod, a fastening bolt is threadedly connected in the pressing strip, the fastening bolt can be threadedly connected with the containing bin, and the pressing strip is located between the stop bar and the inner wall of the containing bin sliding groove.
[0006] A film stretching machine is provided, comprising a frame and a receiving chamber integrally formed to form the machine frame. The frame includes a forming roller disposed on the side of the frame. The receiving chamber has a film inlet and a film outlet on its two sides, with the forming roller located at the film outlet. A cover plate is disposed on the front of the receiving chamber. A lifting mechanism is disposed on the side of the frame, and the frame is connected to the cover plate via the lifting mechanism. The lifting mechanism includes a protrusion fixedly mounted on the side of the cover plate, an end seat fixedly mounted on the side of the frame, a transmission structure, and a braking structure. A guide rail is fixedly mounted on the side of the end seat. The protrusion is slidably connected to the guide rail. A threaded rod rotatably connected to the end seat is disposed inside the guide rail. An embedded nut is fixedly mounted on the inner wall of the protrusion, and the embedded nut is threadedly connected to the threaded rod.
[0007] Preferably, the transmission structure includes a base fixedly installed on the side of the frame and a drive motor disposed on the side of the frame. A driven disc-shaped shaft fixedly connected to a threaded rod is rotatably disposed on the top surface of the end seat. A transmission shaft and a drive shaft are rotatably disposed inside the base, and a bevel gear set is disposed in the internal cavity of the base. The transmission shaft is connected to the drive shaft through the bevel gear set. The drive shaft is also fixedly connected to the output shaft of the drive motor. A drive disc-shaped shaft is fixedly installed through the lower end of the base. A connecting rod is disposed between the drive disc-shaped shaft and the driven disc-shaped shaft. An eccentric shaft is disposed on the bottom surface of both the drive disc-shaped shaft and the driven disc-shaped shaft. The eccentric shaft of the drive disc-shaped shaft is rotatably connected to the connecting rod, and the eccentric shaft of the driven disc-shaped shaft is rotatably connected to the connecting rod.
[0008] Preferably, the braking structure includes a telescopic cylinder disposed on the side of the base, a friction ring fixedly installed on the outer surface of the drive shaft, and a driven clamping block and a driving clamping block slidably disposed inside the base. The driving clamping block is fixedly connected to the piston rod of the telescopic cylinder. An offset rack is fixedly connected to the side of both the driving clamping block and the side of the driven clamping block. A central gear is rotatably disposed inside the base. The central gear is located between the two offset racks and meshes with both offset racks simultaneously.
[0009] Preferably, a gap is provided between the threaded rod and the guide rail to accommodate the embedded nut, and the side wall of the guide rail is provided with a groove for the embedded nut to pass through the connection node between the protrusion and the protrusion.
[0010] Preferably, the connection point between the eccentric shaft of the driving disc shaft and the connecting rod is located at the center of the connecting rod, and the connection point between the eccentric shaft of the driven disc shaft and the connecting rod is located at the end of the connecting rod.
[0011] Preferably, both the surface of the active clamping block and the surface of the driven clamping block are provided with small protrusions, and the outer surface of the friction ring is provided with small grooves that cooperate with the small protrusions.
[0012] Preferably, a gap insert is provided at the connection between the bias rack and the active clamping block and at the connection between the bias rack and the driven clamping block. The gap insert is used to increase the distance between the gap insert and the driven clamping block and the active clamping block, and there is also a gap between the gap insert and the friction ring.
[0013] Preferably, the side of the active clamping block adjacent to the friction ring and the side of the driven clamping block adjacent to the friction ring are both arc-shaped, and the active clamping block and the driven clamping block are symmetrically arranged on both sides of the friction ring.
[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention solves the temperature difference problem of traditional single-sided heating by having two heating rollers simultaneously contact the front and back sides of the film, avoiding cooling wrinkles caused by uneven temperature, improving the quality of film stretching and forming. Furthermore, the distance between the movable roller and the positioning roller of the limiting roller group is adjustable. Combined with the locking structure of the slide and the pressure strip, it can flexibly adapt to the heating requirements of films of different thicknesses and reduce equipment adjustment costs.
[0015] This invention also utilizes a lifting mechanism to achieve rapid opening and closing of the cover plate, reducing manual operation time and improving production efficiency. Simultaneously, a braking structure is used to lock the friction ring and clamping block to prevent the lifting mechanism from accidentally sliding due to inertia or external force, ensuring that the cover plate is fixed in position and preventing impurities from entering the containment chamber and affecting the quality of the membrane. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cover plate structure of the present invention in the open state; Figure 3 This is a schematic diagram of the connection between the movable roller and the receiving bin in this invention; Figure 4 This is an exploded view of the structure at the connection between the movable roller and the receiving bin of the present invention; Figure 5 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the embedded nut structure and a schematic diagram of the guide rail cross section of the present invention; Figure 7 This is a schematic diagram of the connecting rod structure of the present invention; Figure 8 This is a first cross-sectional schematic diagram of the base structure of the present invention; Figure 9 This is a second cross-sectional schematic diagram of the base structure of the present invention.
[0017] In the diagram: 1. Frame; 2. Storage compartment; 3. Cover plate; 4. Forming roller; 5. Lifting mechanism; 51. Guide rail; 52. Connecting rod; 53. Base; 54. End seat; 55. Threaded rod; 56. Protrusion; 57. Embedded nut; 58. Driven disc shaft; 59. Driven disc shaft; 510. Drive motor; 511. Transmission shaft; 512. Bevel gear set; 513. Drive shaft; 514. Telescopic cylinder; 515. Friction ring; 516. Driven clamping block; 517. Driven clamping block; 518. Offset rack; 519. Center gear; 520. Gap insert; 6. Heating roller; 7. Limiting roller set; 71. Movable roller; 72. Positioning roller; 73. Slide seat; 74. Stop bar; 75. Pressure bar; 76. Guide rod; 77. Fastening bolt. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Please see Figures 1-9 This invention provides a technical solution: a double-sided heating device for a film stretching machine, installed inside a receiving chamber 2, including two heating rollers 6 and two sets of limiting roller groups 7. The two heating rollers 6 are respectively arranged vertically and symmetrically, allowing simultaneous heating of both sides of the film, and the two heating rollers 6 can contact both sides of the film respectively. The limiting roller group 7 includes a movable roller 71, a slide 73 rotatably connected to the movable roller 71, a guide rod 76 and a stop bar 74 fixedly installed on the inner wall of the receiving chamber 2, and a positioning roller 72 rotatably connected to the receiving chamber 2. A gap is provided between the movable roller 71 and the positioning roller 72 for the film to pass through. The inner wall has a groove for accommodating the slide block 73, which allows for stepless adjustment of the position of the movable roller 71, making operation flexible and reducing equipment adjustment time. A pressure bar 75 is slidably mounted on the surface of the guide rod 76. The pressure bar 75 is internally threaded with a fastening bolt 77, which can be threaded into the receiving chamber 2. Tightening the fastening bolt 77 fixes the movable roller 71 with preload, preventing changes in spacing due to vibration during operation and ensuring heating stability. The pressure bar 75 is located between the stop bar 74 and the inner wall of the groove in the receiving chamber 2. The guide rod 76 guides the pressure bar 75 to slide, and the stop bar 74 limits the range of movement of the pressure bar 75, simplifying the locking operation, preventing the pressure bar 75 from shifting, and improving adjustment accuracy.
[0020] A film stretching machine is provided, comprising a frame 1 and a receiving chamber 2 integrally formed to form the machine frame. The frame includes a forming roller 4 disposed on the side of the frame 1. The receiving chamber 2 has a film inlet and a film outlet on its two sides, with the forming roller 4 located at the film outlet of the receiving chamber 2. A cover plate 3 is disposed on the front of the receiving chamber 2. A lifting mechanism 5 is disposed on the side of the frame 1, and the frame 1 is connected to the cover plate 3 via the lifting mechanism 5. The lifting mechanism 5 includes a protrusion 56 fixedly installed on the side of the cover plate 3, an end seat 54 fixedly installed on the side of the frame 1, a transmission structure, and a braking structure. A guide rail 51 is fixedly installed on the side of the end seat 54, and the protrusion 56 is slidably connected to the guide rail 51. Through the cooperation between the protrusion 56 and the guide rail 51, the opening and closing of the cover plate 3 is smooth, preventing film displacement or debris due to shaking. The guide rail 51 has a threaded rod 55 rotatably connected to the end seat 54. An embedded nut 57 is fixedly installed on the inner wall of the protrusion 56, and the embedded nut 57 is threadedly connected to the threaded rod 55. A gap is provided between the threaded rod 55 and the guide rail 51 to accommodate the embedded nut 57. A groove is provided on the side wall of the guide rail 51 for the embedded nut 57 to pass through the connection node between the protrusion 56 and the threaded rod 55. The transmission structure includes a base 53 fixedly installed on the side of the frame 1 and a drive motor 510 installed on the side of the frame 1. A driven disc-shaped shaft 58 fixedly connected to the threaded rod 55 is rotatably mounted on the top surface of the end seat 54. A transmission shaft 511 and a drive shaft 513 are rotatably mounted inside the base 53, and a bevel gear set 512 is provided in the internal cavity of the base 53. The drive shaft 511 is connected to the drive shaft 513 via a bevel gear set 512. The drive shaft 513 is also fixedly connected to the output shaft of the drive motor 510. A drive disc shaft 59 is fixedly mounted on the lower end of the drive shaft 511, passing through the base 53. A connecting rod 52 is provided between the drive disc shaft 59 and the driven disc shaft 58. Eccentric shafts are provided on the bottom surfaces of both the drive disc shaft 59 and the driven disc shaft 58. The eccentric shaft of the drive disc shaft 59 is rotatably connected to the connecting rod 52, and the eccentric shaft of the driven disc shaft 58 is also rotatably connected to the connecting rod 52. The connection point between the eccentric shaft of the drive disc shaft 59 and the connecting rod 52 is located at the center of the connecting rod 52, and the connection point between the eccentric shaft of the driven disc shaft 58 and the connecting rod 52 is located at the end of the connecting rod 52. The drive motor 510 is driven by the connecting rod 52. Power is converted into rotation of the threaded rod 55. The braking structure includes a telescopic cylinder 514 disposed on the side of the base 53, a friction ring 515 fixedly mounted on the outer surface of the drive shaft 513, and a driven clamping block 516 and a driven clamping block 517 slidably disposed inside the base 53. The surfaces of the driven clamping block 517 and the driven clamping block 516 are provided with small protrusions. The outer surface of the friction ring 515 is provided with small grooves that mate with the small protrusions. The sides of the driven clamping block 517 adjacent to the friction ring 515 and the sides of the driven clamping block 516 adjacent to the friction ring 515 are both arc-shaped. The driven clamping block 517 and the driven clamping block 516 are symmetrically disposed on both sides of the friction ring 515. The driven clamping block 517 is fixedly connected to the piston rod of the telescopic cylinder 514.Both the side of the driving clamp 517 and the side of the driven clamp 516 are fixedly connected to offset racks 518. A central gear 519 is rotatably mounted inside the base 53, located between the two offset racks 518 and meshing with both racks simultaneously. Clearance inserts 520 are provided at the connections between the offset racks 518 and the driving clamp 517, and at the connections between the offset racks 518 and the driven clamp 516. These clearance inserts 520 increase the distance between themselves and both the driven and driving clamps 517, and a gap also exists between the clearance inserts 520 and the friction ring 515.
[0021] Working principle: The diaphragm is wound sequentially around two heating rollers 6 by the limiting roller group 7 inside the receiving chamber 2. The two heating rollers 6 are arranged vertically, so the front and back of the diaphragm contact the two heating rollers 6 respectively, achieving double-sided heating of the diaphragm. The surface of the diaphragm is uniformly softened after double-sided heating, making it easier to stretch and shape the diaphragm by synchronously driving the forming roller 4. At the same time, the limiting roller group 7 is divided into a movable roller 71 and a positioning roller 72 arranged vertically. The movable roller 71 is rotatably connected to the slide 73, and the positioning roller 72 is connected to the receiving chamber 2. The slide 73 is rotatably connected and can slide up and down within the cavity on the side wall of the receiving chamber 2. After tightening the fastening bolt 77, the slide 73 is pressed by the pressure strip 75, and the position of the slide 73 and the movable roller 71 is locked by the pre-tightening force provided by the fastening bolt 77. Therefore, the distance between the movable roller 71 and the positioning roller 72 can be adjusted according to actual needs to meet the requirements of double-sided heating and stretching of films of different thicknesses. Furthermore, the cover plate 3 of the receiving chamber 2 can be raised and lowered according to the lifting mechanism 5. Therefore, when the film is initially wound on the heating roller 6 inside the receiving chamber 2, the surface of the heating roller 6 is... When the membrane is in its initial state, the cover plate 3 is lowered; when the membrane is heated and stretched, the cover plate 3 is raised to cover the opening of the receiving chamber 2, preventing external impurities from entering the receiving chamber 2 and affecting the membrane quality. The cover plate 3 is slidably connected to the guide rail 51 via a protrusion 56 on its side. The threaded rod 55 inside the guide rail 51 is threadedly connected to the embedded nut 57 on the inner wall of the protrusion 56. Therefore, when the drive motor 510 is started, it sequentially drives the drive disc shaft 59 on the side of the base 53 via the drive shaft 513, the bevel gear set 512, and the transmission shaft 511. The drive disc shaft 59 rotates, and the eccentric shaft on the bottom surface of the drive disc shaft 59 is rotatably connected to the connecting rod 52. The driven disc shaft 58, which is rotatably set on the side of the end seat 54 at the end of the guide rail 51, is also rotatably connected to the threaded rod 55. The driven disc shaft 58 is also rotatably connected to the end of the connecting rod 52 through the eccentric shaft on its bottom surface. Therefore, after the drive disc shaft 59 rotates, the connecting rod 52 can synchronously drive the driven disc shaft 58 and the threaded rod 55 to rotate. After the threaded rod 55 rotates, it can synchronously drive the cover plate 3 and the protrusion 56 to slide up and down along the guide rail 51 to achieve the lifting effect.Finally, the telescopic cylinder 514 is activated, and its piston rod pushes the active clamping block 517 to slide inside the base 53 toward the friction ring 515 on the surface of the drive shaft 513. Both the side of the active clamping block 517 and the side of the driven clamping block 516 are fixed with offset racks 518, and a central gear 519 is provided between the two offset racks 518. The central gear 519 simultaneously meshes with both offset racks 518. Therefore, after the active clamping block 517 slides toward the friction ring 515, the driven clamping block 516 simultaneously slides toward the friction ring 515. The friction ring 515 slides until the active clamping block 517 and the driven clamping block 516 simultaneously contact the friction ring 515. At this time, the small protrusions on the side of the active clamping block 517 and the driven clamping block 516 can be embedded into the small grooves on the surface of the friction ring 515. Through the cooperation of the protrusions and grooves, the friction between them is increased. In conjunction with the squeezing force provided by the telescopic cylinder 514, the rotation of the active shaft 513 and the friction ring 515 is locked, thereby locking the entire lifting mechanism 5 and simultaneously locking the position of the cover plate 3.
[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A double-sided heating device for a film stretching machine, disposed inside a receiving chamber (2), characterized in that: It includes two heating rollers (6) and two sets of limiting rollers (7). The two heating rollers (6) are respectively arranged vertically and vertically, and the two heating rollers (6) can contact the front and back sides of the film respectively. The limiting roller assembly (7) includes a movable roller (71), a slide (73) rotatably connected to the movable roller (71), a guide rod (76) and a stop bar (74) fixedly installed on the inner wall of the receiving chamber (2), and a positioning roller (72) rotatably connected to the receiving chamber (2). A gap for the diaphragm to pass through is provided between the movable roller (71) and the positioning roller (72). The inner wall of the receiving chamber (2) is provided with a groove for accommodating the slide (73). The guide rod (76) has a pressure strip (75) slidably disposed on its surface. The pressure strip (75) is internally threaded with a fastening bolt (77). The fastening bolt (77) can be threadedly connected to the receiving chamber (2). The pressure strip (75) is located between the stop bar (74) and the inner wall of the groove of the receiving chamber (2).
2. A film stretching machine, wherein the frame is integrally formed from a frame body (1) and a receiving chamber (2), characterized in that: The device includes a forming roller (4) disposed on the side of the frame (1), and the two sides of the receiving chamber (2) are respectively provided with a film inlet and a film outlet, and the forming roller (4) is located at the film outlet of the receiving chamber (2); The front of the storage compartment (2) is provided with a cover plate (3), and the side of the frame (1) is provided with a lifting mechanism (5). The frame (1) is connected to the cover plate (3) through the lifting mechanism (5). The lifting mechanism (5) includes a protrusion (56) fixedly installed on the side of the cover plate (3), an end seat (54) fixedly installed on the side of the frame (1), a transmission structure, and a braking structure. A guide rail (51) is fixedly installed on the side of the end seat (54). The protrusion (56) is slidably connected to the guide rail (51). A threaded rod (55) that is rotatably connected to the end seat (54) is provided inside the guide rail (51). An embedded nut (57) is fixedly installed on the inner wall of the protrusion (56). The embedded nut (57) is threadedly connected to the threaded rod (55).
3. A film stretching machine according to claim 2, characterized in that: The transmission structure includes a base (53) fixedly installed on the side of the frame (1) and a drive motor (510) disposed on the side of the frame (1). The top surface of the end seat (54) is rotatably provided with a driven disc-shaped shaft (58) fixedly connected to the threaded rod (55). The base (53) is rotatably provided with a transmission shaft (511) and a drive shaft (513). A bevel gear set (512) is provided in the internal cavity of the base (53). The transmission shaft (511) is connected to the drive shaft (513) through the bevel gear set (512). The drive shaft (513) is also fixedly connected to the output shaft of the drive motor (510). The drive shaft (511) passes through the lower end of the base (53) and is fixedly installed with a drive disc shaft (59). A connecting rod (52) is provided between the drive disc shaft (59) and the driven disc shaft (58). An eccentric shaft is provided on the bottom surface of both the drive disc shaft (59) and the driven disc shaft (58). The eccentric shaft of the drive disc shaft (59) is rotatably connected to the connecting rod (52), and the eccentric shaft of the driven disc shaft (58) is rotatably connected to the connecting rod (52).
4. A film stretching machine according to claim 3, characterized in that: The braking structure includes a telescopic cylinder (514) disposed on the side of the base (53), a friction ring (515) fixedly installed on the outer surface of the drive shaft (513), and a driven clamping block (516) and a driven clamping block (517) slidably disposed inside the base (53). The driven clamping block (517) is fixedly connected to the piston rod of the telescopic cylinder (514). An offset rack (518) is fixedly connected to the side of the driven clamping block (516). A central gear (519) is rotatably disposed inside the base (53). The central gear (519) is located between the two offset racks (518) and is simultaneously meshed with the two offset racks (518).
5. A film stretching machine according to claim 2, characterized in that: A gap is provided between the threaded rod (55) and the guide rail (51) to accommodate the embedded nut (57), and the side wall of the guide rail (51) is provided with a groove for the connection node between the embedded nut (57) and the protrusion (56) to pass through.
6. A film stretching machine according to claim 3, characterized in that: The connection between the eccentric shaft of the active disc shaft (59) and the connecting rod (52) is located at the center of the connecting rod (52), and the connection between the eccentric shaft of the driven disc shaft (58) and the connecting rod (52) is located at the end of the connecting rod (52).
7. A film stretching machine according to claim 4, characterized in that: Both the surface of the active clamping block (517) and the surface of the driven clamping block (516) are provided with small protrusions, and the outer surface of the friction ring (515) is provided with small grooves that cooperate with the small protrusions.
8. A film stretching machine according to claim 4, characterized in that: A gap insert (520) is provided at the connection between the bias rack (518) and the active clamp (517) and at the connection between the bias rack (518) and the driven clamp (516). The gap insert (520) is used to increase the distance between the driven clamp (516) and the active clamp (517), and there is also a gap between the gap insert (520) and the friction ring (515).
9. A film stretching machine according to claim 4, characterized in that: The active clamping block (517) and the side adjacent to the friction ring (515) and the driven clamping block (516) and the side adjacent to the friction ring (515) are both arc-shaped, and the active clamping block (517) and the driven clamping block (516) are symmetrically arranged on both sides of the friction ring (515).