Stretching mechanism for TPU film processing

Abstract

The utility model discloses a stretching mechanism for TPU (thermoplastic polyurethane) film processing in the field of film processing, which structurally comprises a film forming device, a longitudinal stretching component and a movable stretching frame, the movable stretching frame comprises a rack, a movable roller, a swing compression roller structure and a micro-motion stretching structure, the rack is mounted on one side of the film forming device, a sliding groove is arranged in a straight rod on one side of the rack, and the longitudinal stretching component is arranged in the sliding groove. A plurality of moving rollers are installed in sliding grooves formed in the rack, the swing compression roller structure is hinged to the upper end of the rack, the longitudinal stretching assembly and the movable stretching frame are matched to conduct auxiliary stretching work on a film, the occupied space is small, the adjustable flexibility is high, in the film stretching work, a micro adjuster can conduct dynamic adjusting work according to use requirements, and the film stretching efficiency is improved. The defect that the two sides of the thin film are wrinkled and folded due to the fact that a large number of thin films are suspended in the long-range stretching work is overcome, and the stretching work of the thin films of different thicknesses and materials is met.

Description

Technical Field

[0001] The utility model relates to the field of film processing, in particular to a stretching mechanism for TPU film processing. Background Art

[0002] TPU (thermoplastic polyurethane) film is widely used in many industries due to its excellent physical properties and chemical stability, such as footwear, clothing, medical, packaging, electronics, etc. When processing TPU film, the stretching process is one of the important steps that affect its final performance and quality. The stretching mechanism of TPU film is usually designed to operate under precise control of temperature, speed and stretching ratio to ensure that the mechanical properties of the film are optimized during the molding process.

[0003] In view of the current film processing field, corresponding solutions have been formulated for the following existing problems:

[0004] At present, during the processing of films, complex adjustments need to be made, and the traditional adjustment mechanism has poor expandability. When faced with complex adjustments, additional spare parts are usually required to ensure the film stretching effect. This leads to complex external parts of the film forming equipment, resulting in a large space occupation, and greater restrictions on the stretching direction of the film, making it inconvenient to carry out the guided stretching of the film. In addition, in the traditional film stretching process, when the two sides of the film are subjected to uneven tension during the stretching stage, the film is easily deformed, which can easily affect the quality of the finished film. Utility Model Content

[0005] The main purpose of the utility model is to overcome the shortcomings of the prior art and provide a stretching mechanism for TPU film processing.

[0006] The utility model is implemented by the following technical scheme: a stretching mechanism for TPU film processing, the structure of which includes a film forming device, a longitudinal stretching assembly, and a mobile stretching frame, wherein the longitudinal stretching assembly is installed in the middle of the film forming device, and the mobile stretching frame is installed outside the film forming device;

[0007] The movable stretching frame comprises a frame, a movable roller, a swinging pressure roller structure, and a micro-motion stretching structure. The frame is installed on one side of a film forming device. A sliding groove is provided in a straight rod on one side of the frame. Several movable rollers are installed in the sliding grooves provided on the frame. The swinging pressure roller structure is hingedly installed on the upper end of the frame.

[0008] Furthermore, the longitudinal stretching assembly includes a support plate, an adjusting handwheel, a steering gear, and a transmission assembly. Several of the support plates are installed on both sides of one end of the film forming device, and several of the support plates have a fixed plate in the middle for support cooperation. The transmission assembly is installed on the inner side of one end of the support plate, the adjusting handwheel is hingedly installed on the outer surface of one side of the support plate, and the steering gear is installed on the fixed plate in the middle of the support plate. The adjusting handwheel is installed together with the steering gear using a driving rod, and the output shaft of the steering gear is hingedly installed together with the fixed plate.

[0009] Furthermore, the swing pressure roller structure is composed of a swing plate and a swing roller, a plurality of the swing plates are mounted on the inner side of the upper end of the frame by fixing bolts, and the swing roller is mounted in the waist hole of the swing plate.

[0010] Furthermore, the micro-motion stretching structure includes a support frame, a first drive motor, a transmission shaft, and a micro-motion adjuster. Several of the support frames are symmetrically installed on the inner side of the frame, the first drive motor is installed above the support provided by the support frame, the transmission shaft is hingedly installed in the crossbeam provided by the support frame, the transmission shaft and the output shaft provided by the first drive motor are installed together through gear meshing, the micro-motion adjuster is installed on one side of the support frame, and the micro-motion adjuster is installed together with the transmission shaft.

[0011] Furthermore, the micro-adjuster includes a transmission support seat, a second drive motor, a fixed block, a hinged head, an adjustment block, and lateral support rollers. A screw transmission seat is provided on one side of the lower end of the transmission support seat, the second drive motor is installed on the upper end of the transmission support seat, the fixed block and the output end of the second drive motor are installed together, the hinged head is hingedly installed in a groove at one end of the fixed block, the adjustment block is slidably installed in a groove in the middle part of the fixed block, and a plurality of lateral support rollers are hingedly installed on the hinged head and the outside of the adjustment block.

[0012] Furthermore, the conveying assembly includes a mounting shaft, a stretching roller, a fixing part, and an auxiliary roller. The mounting shaft is mounted on the inner side of a support plate, the stretching roller is hingedly mounted on the mounting shaft, the fixing part is symmetrically clamped on the mounting shaft, the fixing part is distributed at both ends of the stretching roller, and the auxiliary roller is mounted together with the fixing part via hinged rods provided at both ends.

[0013] Furthermore, an installation notch is provided on an outer surface of one end of the fixing member, and an installation groove is provided on an outer surface of the other end of the fixing member.

[0014] Furthermore, the oil supply passage provided by the flow regulating structure passes through the inclined surface provided by the matching inclined surface.

[0015] Compared with the prior art, the beneficial effects of the utility model are: the longitudinal stretching component of the utility model cooperates with the mobile stretching frame to assist in stretching the film, occupies a small space, and has high adjustable flexibility. In the film stretching work, the micro-adjuster can dynamically adjust according to the use requirements, thereby solving the problem of a large amount of film hanging in the air during long-range stretching work, which leads to wrinkles and creases on both sides of the film, and meets the stretching work of films of different thicknesses and materials. Multiple mobile rollers that can be freely adjusted can enable the film to unfold a variety of stretching and traction methods to meet the different stretching requirements of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the longitudinal stretching component of the utility model.

[0018] Figure 3 It is a bottom-up stereoscopic structural schematic diagram of the longitudinal stretching assembly of the utility model.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the fixing member of the utility model.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the mobile stretching frame of the utility model.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the micro-adjuster of the utility model.

[0022] Figure 7 It is a side view of the micro-adjuster of the utility model.

[0023] Figure 8 It is a schematic diagram of the internal structure of the fixing block of the utility model.

[0024] In the figure: film forming device 100, longitudinal stretching component 200, mobile stretching frame 300, support plate 210, adjusting hand wheel 220, diverter 230, transmission component 240, installation shaft 241, stretching roller 242, fixing part 243, auxiliary roller 244, frame 310, mobile roller 320, swing pressure roller structure 330, micro-stretching structure 340, swing plate 331, swing roller 332, support frame 341, first drive motor 342, transmission shaft 343, micro-adjuster 344, transmission support seat 3441, second drive motor 3442, fixing block 3443, hinged head 3444, adjusting block 3445, lateral support roller 3446, installation notch 2431, installation slide 2432. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-8 The utility model provides a technical solution of a stretching mechanism for processing TPU film: a stretching mechanism for processing TPU film, the structure of which includes a film forming device 100, a longitudinal stretching assembly 200, and a mobile stretching frame 300, wherein the longitudinal stretching assembly 200 is installed in the middle of the film forming device 100, and the mobile stretching frame 300 is installed outside the film forming device 100;

[0027] The mobile stretching frame 300 includes a frame 310, a movable roller 320, a swinging pressure roller structure 330, and a micro-stretching structure 340. The frame 310 is installed on one side of the film forming device 100. A sliding groove is provided in a straight rod on one side of the frame 310. Several movable rollers 320 are installed in the sliding grooves provided on the frame 310. The movable rollers 320 can move freely according to usage requirements to meet different stretching requirements. The swinging pressure roller structure 330 is hingedly installed on the upper end of the frame 310.

[0028] Preferably, the longitudinal stretching assembly 200 includes a support plate 210, an adjusting handwheel 220, a steering gear 230, and a transmission assembly 240. Several of the support plates 210 are installed on both sides of one end of the film forming device 100, and several of the support plates 210 have a fixed plate in the middle for support and cooperation. The transmission assembly 240 is installed on the inner side of one end of the support plate 210, and the adjusting handwheel 220 is hingedly installed on the outer surface of one side of the support plate 210. The steering gear 230 is installed on the fixed plate in the middle of the support plate 210. The adjusting handwheel 220 is installed together with the steering gear 230 using a driving rod, and the output shaft of the steering gear 230 is hingedly installed with the fixed plate. The output shaft of the steering gear 230 can be driven to rotate by adjusting the handwheel 220, and the reversing output is realized by installing the driving rod and the steering gear 230 together.

[0029] Preferably, the swing pressure roller structure 330 is composed of a swing plate 331 and a swing roller 332. Several of the swing plates 331 are installed on the inner side of the upper end of the frame 310 by fixing bolts. The swing roller 332 is installed in the waist hole of the swing plate 331. The swing roller 332 can rotate freely through the bearing. The swing plate 331 can freely adjust the swing angle according to the use requirements, and the swinging work is achieved by loosening and tightening the fixing bolts. The swing roller 332 can achieve different working postures by changing the installation position in the waist hole of the swing plate 331, and can be freely adjusted according to the film stretching requirements.

[0030] Preferably, the micro-motion stretching structure 340 includes a support frame 341, a first drive motor 342, a transmission shaft 343, and a micro-motion adjuster 344. Several of the support frames 341 are symmetrically installed on the inner side of the frame 310. The first drive motor 342 is installed above the support provided by the support frame 341. The transmission shaft 343 is hingedly installed in the crossbeam provided by the support frame 341. The transmission shaft 343 and the output shaft provided by the first drive motor 342 are installed together through gear meshing. The first drive motor 342 drives the transmission shaft 343 to rotate through the output shaft, so that the transmission shaft 343 drives the micro-motion adjuster 344 to move horizontally. The micro-motion adjuster 344 is installed on one side of the support frame 341, and the micro-motion adjuster 344 is installed together with the transmission shaft 343.

[0031] Preferably, the fine-motion adjuster 344 includes a transmission support seat 3441, a second drive motor 3442, a fixed block 3443, a hinge head 3444, an adjustment block 3445, and a lateral support roller 3446. A screw drive seat is provided at one side of the lower end of the transmission support seat 3441. The screw drive seat can be installed together with the rotating shaft, and the transmission shaft cooperates with the screw drive seat to drive the transmission support seat 3441 to move. The second drive motor 3442 is installed at the upper end of the transmission support seat 3441, and the output end of the second drive motor 3442 is penetrated at the upper end of the transmission support seat 3441. The fixed block 3443 is installed together with the output end of the second drive motor 3442, and the fixed block 3443 can be swung by the second drive motor. The hinged head 3444 is hingedly installed in the groove at one end of the fixed block 3443, and the adjusting block 3445 is slidably installed in the middle groove of the fixed block 3443. A plurality of lateral support rollers 3446 are hingedly installed on the outside of the hinged head 3444 and the adjusting block 3445. The hinged head 3444 can drive the lateral support roller 3446 to swing, and the adjusting block 3445 can drive the lateral support roller 3446 to move.

[0032] Preferably, the conveying assembly 240 includes a mounting shaft 241, a stretching roller 242, a fixing member 243, and an auxiliary roller 244. The mounting shaft 241 is mounted on the inner side of the support plate 210, the stretching roller 242 is hingedly mounted on the mounting shaft 241, the fixing member 243 is symmetrically clamped and mounted on the mounting shaft 241, the fixing member 243 is distributed at both ends of the stretching roller 242, and the auxiliary roller 244 is installed together with the fixing member 243 via hinged rods provided at both ends thereof. The auxiliary roller 244 and the stretching roller 242 can both rotate freely through bearings, and the auxiliary roller 244 can cooperate with the stretching roller 242 to extrude and convey the film, thereby achieving different stretching effects.

[0033] Preferably, an installation notch 2431 is provided on the outer surface of one end of the fixing member 243, and an installation groove 2432 is provided on the outer surface of the other end of the fixing member 243. The symmetrically distributed fixing members 243 can be installed on the installation shaft 241 through the installation notch 2431 and locked and fixed by locking bolts. The installation groove 2432 can provide installation space for the auxiliary roller 244, and the auxiliary roller 244 can slide in the symmetrically distributed installation groove 2432.

[0034] When the stretching mechanism for TPU film processing is used, the formed film is led out of the film forming device to the longitudinal stretching assembly, and the film is pulled and stretched by the conveying roller in the longitudinal stretching assembly;

[0035] The film is stretched in the longitudinal stretching assembly. The swing position of the auxiliary roller can be adjusted according to the use requirements, and the swing angle of the swing roller can be controlled to change the stretching direction and force of the film to meet different use requirements.

[0036] By turning the adjusting hand wheel, the film forming device can be adjusted through the steering gear;

[0037] When the mobile stretching frame is installed on the outside of the longitudinal stretching assembly, the moving roller, the swing roller and the micro-motion stretching structure can work together to achieve different stretching effects in the traction and stretching of the film.

[0038] The micro-motion stretching structure can assist in traction work on both sides of the film, and can adjust the swing posture of the lateral support roller through the second drive motor according to the needs. The fixed block can swing to meet the fine-tuning needs of the film in wide and long-range stretching work;

[0039] When the distance between the two lateral support rollers needs to be adjusted according to the film thickness, the adjustment requirement is met by controlling the mounting position of the adjustment block in the fixed block;

[0040] The lateral support rollers on the outside can realize the function of articulated swing through the articulated joints, providing different installation methods for the film during traction and stretching work.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stretching mechanism for TPU film processing, comprising a film forming device (100), a longitudinal stretching assembly (200), and a movable stretching frame (300), characterized in that: The longitudinal stretching assembly (200) is installed in the middle of the film forming device (100), and the movable stretching frame (300) is installed outside the film forming device (100); The mobile stretching frame (300) comprises a frame (310), a movable roller (320), a swinging pressure roller structure (330), and a micro-motion stretching structure (340); the frame (310) is mounted on one side of the film forming device (100); a sliding groove is provided in a straight rod on one side of the frame (310); a plurality of the movable rollers (320) are mounted in the sliding grooves provided on the frame (310); and the swinging pressure roller structure (330) is hingedly mounted on the upper end of the frame (310).

2. A stretching mechanism for TPU film processing according to claim 1, characterized in that: The longitudinal stretching assembly (200) comprises a support plate (210), an adjusting hand wheel (220), a steering gear (230), and a transmission assembly (240); a plurality of the support plates (210) are mounted on both sides of one end of the film forming device (100); a plurality of the support plates (210) are provided with a fixed plate in the middle for support cooperation; the transmission assembly (240) is mounted on the inner side of one end of the support plate (210); the adjusting hand wheel (220) is hingedly mounted on the outer surface of one side of the support plate (210); the steering gear (230) is mounted on a fixed plate provided in the middle of the support plate (210); the adjusting hand wheel (220) is mounted together with the steering gear (230) by using a driving rod; and an output shaft provided on the steering gear (230) is hingedly mounted together with the fixed plate.

3. A stretching mechanism for TPU film processing according to claim 1, characterized in that: The swing pressure roller structure (330) is composed of a swing plate (331) and a swing roller (332); a plurality of the swing plates (331) are mounted on the inner side of the upper end of the frame (310) via fixing bolts; and the swing roller (332) is mounted in a waist hole provided on the swing plate (331).

4. A stretching mechanism for TPU film processing according to claim 1, characterized in that: The micro-motion stretching structure (340) comprises a support frame (341), a first drive motor (342), a transmission shaft (343), and a micro-motion adjuster (344); a plurality of the support frames (341) are symmetrically mounted on the inner side of the frame (310); the first drive motor (342) is mounted above a support provided on the support frame (341); the transmission shaft (343) is hingedly mounted in a crossbeam provided on the support frame (341); the transmission shaft (343) and an output shaft provided on the first drive motor (342) are mounted together through gear meshing; the micro-motion adjuster (344) is mounted on one side of the support frame (341); and the micro-motion adjuster (344) and the transmission shaft (343) are mounted together.

5. A stretching mechanism for TPU film processing according to claim 4, characterized in that: The micro-adjuster (344) comprises a transmission support seat (3441), a second drive motor (3442), a fixed block (3443), a hinged head (3444), an adjustment block (3445), and a lateral support roller (3446); a screw transmission seat is provided on one side of the lower end of the transmission support seat (3441); the second drive motor (3442) is mounted on the upper end of the transmission support seat (3441); the fixed block (3443) and the output end of the second drive motor (3442) are mounted together; the hinged head (3444) is hingedly mounted in a groove at one end of the fixed block (3443); the adjustment block (3445) is slidably mounted in a groove in the middle of the fixed block (3443); and a plurality of lateral support rollers (3446) are hingedly mounted on the hinged head (3444) and the outer sides of the adjustment block (3445).

6. A stretching mechanism for TPU film processing according to claim 2, characterized in that: The conveying assembly (240) comprises a mounting shaft (241), a stretching roller (242), a fixing member (243), and an auxiliary roller (244); the mounting shaft (241) is mounted on the inner side of the support plate (210); the stretching roller (242) is hingedly mounted on the mounting shaft (241); the fixing member (243) is symmetrically clamped and mounted on the mounting shaft (241); the fixing member (243) is distributed at both ends of the stretching roller (242); and the auxiliary roller (244) is mounted together with the fixing member (243) via hinged rods provided at both ends thereof.

7. A stretching mechanism for TPU film processing according to claim 6, characterized in that: An outer surface of one end of the fixing member (243) is provided with a mounting notch (2431), and an outer surface of the other end of the fixing member (243) is provided with a mounting slide groove (2432).

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