Thick sheet water removal device

Abstract

The utility model discloses a thick sheet dewatering device which comprises a water absorption roller set supported by a supporting mechanism, the water absorption roller set comprises a water absorption roller A and a water absorption roller B which are connected through a connecting rod, and the connecting rod is connected with a driving device. The driving device can drive the connecting rod to rotate so that the water absorption roller A and the water absorption roller B can be exchanged between the working position and the drying position. The water removal device provided by the utility model is compact in structure, small in occupied space, practical and reliable, can adapt to the production of double-stretching film materials with large-range specifications and various types, and can improve the performance of equipment, improve the quality of film products and stabilize the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of film stretching production technology, and in particular to a thick sheet dehydration device. Background Technology

[0002] Biaxially oriented plastic film (BOPF) is a processing technology that began to be industrialized in the 1970s. BOPF is a general term for plastic films produced by biaxial stretching (or biaxial orientation). Films produced by biaxial stretching equipment are mostly used in packaging, electrical materials, photosensitive materials, agriculture, building decoration, and daily necessities. BOPF has developed rapidly in the last decade and has become a major packaging material for various high-performance packaging films. As the market demands higher quality for stretched films, one key requirement is innovative equipment, stable equipment functions, clear processes, and reliable procedures.

[0003] Dehydration of the thick film sheets after casting and cooling in stretch film production is a crucial step that directly affects the surface quality of the sheet. Currently, the conventional method involves using absorbent rollers to remove moisture from the thick film surface. However, due to the high moisture content of the thick film surface, the absorbent rollers easily become saturated. Therefore, to ensure thorough dehydration, multiple sets of absorbent rollers connected in series must be installed, which occupies a significant amount of space. Furthermore, even with multiple sets of absorbent rollers, they still need to be dried / replaced promptly, and this drying / replacement process negatively impacts production continuity. Utility Model Content

[0004] In order to solve one or more technical problems in the prior art, the present invention provides a thick sheet dewatering device.

[0005] A thick sheet dewatering device includes a water-absorbing roller assembly supported by a support mechanism. The water-absorbing roller assembly includes a water-absorbing roller A and a water-absorbing roller B connected by a connecting rod. The connecting rod is connected to a driving device, which can drive the connecting rod to rotate so that the water-absorbing roller A and the water-absorbing roller B can be exchanged between a working position and a drying position.

[0006] Preferably, a water remover is provided on one side of the water-absorbing roller assembly;

[0007] When the positions of the water-absorbing roller A and the water-absorbing roller B are exchanged, the water-absorbing roller moving from the working position to the drying position is squeezed by the water remover during its movement to drain water.

[0008] Preferably, a water receiving box is provided below the water suction roller assembly, which is used to receive the drainage generated by the water separator squeezing the water suction roller.

[0009] Preferably, the water separator extends between the water suction roller assembly and the water receiving box, and the water separator is provided with a drain hole, through which the drainage generated by the water separator squeezing the water suction roller is discharged to the water receiving box.

[0010] Preferably, the main body of the extrusion surface of the water remover that contacts the water suction roller is arc-shaped, and the extrusion surface gradually approaches the rotation axis of the connecting rod from bottom to top;

[0011] When the positions of the water-absorbing roller A and the water-absorbing roller B are exchanged, the water-absorbing roller that moves from the working position to the drying position gradually approaches the extrusion surface during its movement and is eventually squeezed and deformed by the extrusion surface to remove water.

[0012] Preferably, the support mechanism includes a support frame and a cylinder. The extension and retraction of the cylinder can cause the support frame to shift, thereby adjusting the distance between the water-absorbing roller assembly and the thick sheet.

[0013] Preferably, the support frame is connected to the water separator and the water receiving box, and the extension and retraction of the cylinder can cause the water separator, the water receiving box and the support frame to move synchronously.

[0014] Preferably, the absorbent roller assembly is arranged on one or both sides of the thick sheet.

[0015] Preferably, both the water-absorbing roller A and the water-absorbing roller B are water-absorbing rubber rollers.

[0016] Preferably, the drive device is connected to the control system, which can trigger the drive device to work at regular intervals so that the water-absorbing roller A and the water-absorbing roller B can be exchanged between the working position and the drying position.

[0017] The beneficial effects of this utility model are:

[0018] This invention provides a stable and efficient dewatering device for thick films. It improves upon existing technologies that use multiple sets of suction rollers by employing a real-time / timed switching mechanism between two sets of suction rollers in the working and drying positions, ensuring the dewatering device is always operating at high efficiency. The dewatering device provided by this invention has a compact structure, occupies little space, is practical and reliable, and can adapt to the production of a wide range of specifications and types of biaxially oriented film materials. It can improve equipment performance, enhance film product quality, and stabilize production efficiency. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0020] Figure 1 This is a schematic diagram of a thick-plate dewatering device according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of a thick-plate dewatering device according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 3 This is a schematic diagram of a thick-plate dewatering device according to an embodiment of the present invention. Figure 3 ;

[0023] Figure 4 This is a schematic diagram of a thick-plate dewatering device according to an embodiment of the present invention. Figure 4 ;

[0024] Figure 5 This is a schematic diagram of a thick-plate dewatering device according to an embodiment of the present invention. Figure 5 ;

[0025] In the diagram: 1. Support mechanism; 101. Support frame; 102. Cylinder; 2. Water suction roller assembly; 201. Connecting rod; 202. Water suction roller A; 203. Water suction roller B; 204. Drive device; 3. Water separator; 301. Drain hole; 302. Extrusion surface; 4. Water receiving box; 5. Thick sheet; 6. Water suction single roller. Detailed Implementation

[0026] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0027] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] like Figures 1-5As shown, a thick sheet dewatering device includes a water-absorbing roller group 2 supported by a support mechanism 1. The water-absorbing roller group 2 includes a water-absorbing roller A202 and a water-absorbing roller B203 connected by a connecting rod 201. The connecting rod 201 is connected to a driving device 204, which can drive the connecting rod 201 to rotate so that the water-absorbing roller A202 and the water-absorbing roller B203 can be exchanged between a working position and a drying position.

[0029] In biaxial stretching line equipment, the molten material in the die head is guided into a water tank for immersion cooling via cold roller forming, and then the sheet is dried to remove moisture. Existing technology uses multiple absorbent drying rollers connected in series for drying. The disadvantage of this dehydration process is that the dehydration effect decreases after the absorbent drying rollers have been working continuously for a period of time, requiring machine shutdown and replacement, which affects subsequent film processing.

[0030] In practical use, for example, initially, the water-absorbing roller A202 is in the working position, and the water-absorbing roller B203 is in the drying position. After working for a period of time, the water absorption effect of the water-absorbing roller A202 in the working position decreases. The driving device 204 drives the connecting rod 201 to rotate, moving the water-absorbing roller B to the working position for water absorption, and moving the water-absorbing roller A201 to the drying position for drying. This switching process is rapid, and by setting multiple water-absorbing roller groups 2, each water-absorbing roller group 2 can be alternately replaced at intervals. This ensures that while one water-absorbing roller group 2 is being replaced, other water-absorbing roller groups 2 are still drying thick sheets, minimizing the adverse impact on production continuity. Water-absorbing roller replacement can be performed without stopping the production line. The drying of the water-absorbing rollers can be achieved by methods such as baking, air drying, sun drying, and squeezing to drain water.

[0031] This invention is mainly applied to the casting device in biaxial stretching line equipment, and can also be applied to the water absorption and drying process of other production equipment.

[0032] In one specific embodiment of this utility model, a water remover 3 is provided on one side of the water-absorbing roller assembly 2;

[0033] When the positions of the suction rollers A202 and B203 are exchanged, the suction rollers moving from the working position to the drying position are squeezed by the dewatering device 3 during their movement to drain water.

[0034] Water separators that use a squeezing method to drain water can be categorized into two types: one type uses a fixed squeezing surface to contact a rotating suction roller to squeeze the water out of the roller; the other type uses a rotating squeezing surface (such as a rotating squeezing roller) to contact the suction roller to squeeze the water out of the roller.

[0035] This embodiment adds a water separator 3, which squeezes and drains water from the suction roller as it moves from the working position to the drying position when the suction rollers are switched. This design further optimizes the drying process of the suction rollers. Compared to relying solely on natural drying or subsequent drying or air drying, it can remove a large amount of moisture from the suction rollers more quickly and effectively, allowing the suction rollers to regain their high-efficiency water absorption capacity more quickly and improving the overall efficiency of the water removal device.

[0036] Furthermore, a heating element can be installed inside the dewatering device 3. When the suction roller passes through the dewatering device 3 or is in the drying position above the dewatering device 3, the dewatering device 3 can appropriately heat the suction roller to accelerate water evaporation and improve dewatering efficiency.

[0037] In one specific embodiment of this utility model, a water receiving box 4 is provided below the water suction roller group 2. The water receiving box 4 is used to receive the drainage generated by the water separator 3 squeezing the water suction roller.

[0038] In this embodiment, a water receiving box 4 is added to receive the drainage generated by the water suction roller squeezed by the water separator 3. This improvement enables the water in the water removal process to be effectively collected, avoiding the adverse effects of water flowing randomly on the equipment and working environment. It also facilitates the subsequent treatment or recycling of water.

[0039] In one specific embodiment of this utility model, the water separator 3 extends between the water suction roller group 2 and the water receiving box 4. The water separator 3 is provided with a drain hole 301. The drainage generated by the water separator 3 squeezing the water suction roller is discharged to the water receiving box 4 through the drain hole 301.

[0040] like Figure 1 As shown, the suction roller assembly 2 is the key component for water removal in the entire device, and it is mounted on the support mechanism 1. A water separator 3 is located below the suction roller assembly 2, and a water collection box 4 is placed below the water separator 3. In this embodiment, the water separator 3 extends between the suction roller assembly 2 and the water collection box 4, and is provided with a drain hole 301 to discharge the water generated by the squeezing into the water collection box. This design optimizes the drainage path, making the drainage process more direct and efficient, and ensuring smooth drainage. The water separator 3, the suction roller assembly 2, and the water collection box 4 form a complete and efficient drainage system. Furthermore, baffles can be added around the water separator 3, the suction roller 2, and the water collection box 4 to ensure that water does not leak out.

[0041] In one specific embodiment of this utility model, the main body of the extrusion surface 302 that contacts the water absorber 3 and the water suction roller is arc-shaped, and the extrusion surface 302 gradually approaches the rotation axis of the connecting rod 201 from bottom to top;

[0042] When the positions of the suction rollers A202 and B203 are exchanged, the suction rollers moving from the working position to the drying position gradually approach the extrusion surface 302 during their movement and are eventually squeezed and deformed by the extrusion surface 302 to remove water.

[0043] When the film sheet is cooled and formed, it passes through the dewatering device. One of the water-absorbing rollers (water-absorbing roller A202 or water-absorbing roller B203) in the water-absorbing roller group 2 installed on the support mechanism 1 contacts the film sheet and absorbs water for drying. When production has been going on for a certain period of time, the water-absorbing roller in the working position reaches saturation, and the water absorption and drying effect decreases. At this time, the system starts the drive device 204 to move the water-absorbing roller in the drying position to the working position to continue the water absorption and drying of the film sheet. During the position switching process, the water-absorbing roller moving from the working position to the drying position passes through the water separator 3 to squeeze out the water absorbed during the drying of the film. Then it is in the drying position to wait or to be further dried by air drying, baking, or drying. The squeezed water is collected by the water receiving box 4 and guided into the water tank to avoid direct dripping and splashing. When the water absorption efficiency of the suction roller in the working position drops to a certain level, or after a set reasonable time interval, it switches to the suction roller in the drying position. This cycle repeats periodically, ensuring that the suction roller in the working position is always in a state of high water absorption efficiency for drying the thick film, effectively guaranteeing the water removal effect of the thick film. The switching of the suction roller can be triggered manually, or automatically by timed programming or based on feedback from other signals on the production line.

[0044] Furthermore, the material of the extrusion surface 302 can be a material with high friction and good drainage performance. The surface of the extrusion surface 302 can also be provided with raised textures to enhance the extrusion effect on the water absorption roller, and / or with recessed water guide grooves to reduce water residue.

[0045] In one specific embodiment of this utility model, the support mechanism 1 includes a support frame 101 and a cylinder 102. The extension and retraction of the cylinder 102 can cause the support frame 101 to move, thereby adjusting the distance between the water absorption roller group 2 and the thick sheet 5.

[0046] like Figure 1 As shown, during operation, cylinder 102 extends and pushes the suction roller to contact the thick sheet 5, and the suction roller assembly 2 dries the thick sheet 5. Figure 3 As shown, when the machine stops, cylinder 102 retracts and pulls the suction roller away from the working position.

[0047] This embodiment improves the support mechanism 1 by using a combination of a support frame 101 and a cylinder 102. The extension and retraction of the cylinder 102 causes the support frame 101 to shift, thereby adjusting the distance between the suction roller assembly 2 and the thick sheet 5. This design allows for flexible adjustment of the contact degree between the suction roller and the thick sheet of different specifications according to actual production needs, ensuring effective water absorption while avoiding excessive compression that could damage the thick sheet or the suction roller. The cooperation between the cylinder 102 and the support frame 101 forms an adjustable support system, closely connected to the suction roller assembly 2. Based on factors such as the thickness and material of the thick sheet, the position of the suction roller assembly 2 is precisely controlled, ensuring efficient and stable water removal and improving the device's adaptability to different production conditions.

[0048] In one specific embodiment of this utility model, the support frame 101 is connected to the water separator 3 and the water receiving box 4, and the extension and retraction of the cylinder 102 can cause the water separator 3, the water receiving box 4 and the support frame 101 to move synchronously.

[0049] like Figure 1 , 3 As shown, in this embodiment, the support frame 101 is connected to the water separator 3 and the water receiving box 4, and the synchronous displacement of the three is achieved by the extension and retraction of the cylinder 102. In actual production, when the distance between the suction roller group 2 and the thick sheet needs to be adjusted, this design can ensure that the relative position relationship between the water separator 3 and the suction roller group 2 remains stable during the extension and retraction of the cylinder 102, and the water receiving box 4 can also accurately receive the drainage, improving the overall coordination and stability of the equipment. Preferably, a dual-cylinder or multi-cylinder collaborative working method is adopted to enhance the support and adjustment capabilities of the support frame 101, making the support frame 101 more stable during movement, avoiding positional deviation or shaking caused by uneven force on a single cylinder, and improving the stability of the support mechanism 1.

[0050] In one specific embodiment of this utility model, the water-absorbing roller group 2 is arranged on one or both sides of the thick sheet 5.

[0051] like Figures 1-2 As shown, when the suction roller assembly 2 is arranged on one side of the thick sheet 5, a single suction roller 6 can be set on the other side of the thick sheet 5. This design is suitable for applications with limited production space. Although the single suction roller 6 also has the problem of inconvenient replacement after saturation, its more important role is to provide opposing forces for the suction roller assembly 2, thereby ensuring good contact between the suction roller assembly 2 and the thick sheet 5. Figure 4 As shown, to address the issue of insufficient water absorption on one side of the thick sheet 5 due to the saturation of the single suction roller 6 on the other side, another set of suction rollers 2 and single suction roller 6 with a different orientation than the upstream rollers can be installed in a location with sufficient space downstream of the thick sheet 5. For applications with ample production space, the suction roller sets 2 can be symmetrically arranged on both sides of the thick sheet 5.

[0052] Furthermore, different specifications or materials of water-absorbing rollers can be used on both sides of the thick sheet to specifically absorb and remove water according to the moisture distribution characteristics of the thick sheet during the production process, thereby improving the water removal effect.

[0053] In one specific embodiment of this utility model, both the water-absorbing roller A202 and the water-absorbing roller B203 are water-absorbing rubber rollers.

[0054] In the prior art, a wide variety of absorbent materials can be used for absorbent rollers, including PU (polyurethane) sponge, PVC (polyvinyl chloride) sponge, and PVA (polyvinyl alcohol) sponge. The preferred absorbent material for this invention is sponge rubber, and more preferably, EPDM sponge rubber. EPDM sponge rubber has excellent water absorption, chemical corrosion resistance, and aging resistance, and can maintain good water absorption and physical properties even under prolonged contact with water and repeated compression.

[0055] Furthermore, the surface of the absorbent rubber roller can be specially treated, such as by coating it with a nano-scale absorbent coating. This coating has super absorbency and anti-fouling properties, which can further improve the absorbency of the absorbent roller, while preventing impurities from adsorbing onto the surface of the absorbent roller, thus extending the cleaning cycle and service life of the absorbent roller.

[0056] In one specific embodiment of this utility model, the drive device 204 is connected to the control system, and the control system can trigger the drive device 204 to work at regular intervals so that the water absorption roller A202 and the water absorption roller B203 can be exchanged between the working position and the drying position.

[0057] The drive device 204 can be a motor directly connected to the connecting rod 201, or a hydraulic or pneumatic mechanical structure connected to the connecting rod 201 via chain drive, gear drive, or other means. Preferably, the drive device 204 is a motor. There are many types of motors available in the prior art, and this invention does not have strict requirements on motor precision; it only needs to ensure that the motor can be connected to the control system and can manually or automatically switch the position of the suction rollers according to production conditions. In a simple arrangement, the motor shaft is connected to the middle of the connecting rod 201, and the suction rollers A202 and B203 are symmetrically arranged on both sides of the middle of the connecting rod 201. Figure 2 As shown, a drive device 204 is set on one side of the water suction roller group 2, and a rotating shaft is set on the other side, which can realize the position rotation switching between water suction roller A202 and water suction roller B203.

[0058] Traditional methods of changing suction rollers rely heavily on manual observation and operation, lacking precise timing and automated control mechanisms. This embodiment integrates the drive device 204 into the control system. The control system triggers the drive device 204 at regular intervals, enabling automatic switching of the suction roller between the working and drying positions. This automated control method improves the accuracy and timeliness of suction roller switching, avoiding the decline in dewatering efficiency caused by untimely or inaccurate manual operation, thus allowing the dewatering device to operate more stably and efficiently.

[0059] Furthermore, communication interfaces can be established between the control system and other production equipment to achieve coordinated control of the dewatering device and the entire production line. For example, the switching time and operating parameters of the suction rollers can be automatically adjusted based on parameters such as the production line's operating speed, sheet thickness, and cooling time, achieving intelligent production. Simultaneously, fault diagnosis and early warning functions can be added to the control system. By monitoring the operating status of components such as drive units and sensors in real time, potential faults can be detected promptly, and early warning signals can be issued to facilitate maintenance personnel, reduce equipment downtime, and further improve the reliability and stability of the equipment.

[0060] In summary, the dewatering device provided by this utility model has a compact structure, occupies little space, is practical and reliable, and can adapt to the production of bistretched film materials of a wide range of specifications and types. It can improve the performance of the equipment, improve the quality of film products, and stabilize production efficiency.

[0061] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A thick-plate dewatering device, comprising a water-absorbing roller assembly (2) supported by a support mechanism (1), characterized in that, The absorbent roller assembly (2) includes absorbent roller A (202) and absorbent roller B (203) connected by a connecting rod (201). The connecting rod (201) is connected to a driving device (204), which can drive the connecting rod (201) to rotate so that the absorbent roller A (202) and the absorbent roller B (203) can exchange between the working position and the drying position.

2. The thick-plate dewatering device according to claim 1, characterized in that, A water remover (3) is provided on one side of the water suction roller assembly (2); When the positions of the water-absorbing roller A (202) and the water-absorbing roller B (203) are exchanged, the water-absorbing roller that moves from the working position to the drying position is squeezed by the water remover (3) to drain water during its movement.

3. The thick-plate dewatering device according to claim 2, characterized in that, A water receiving box (4) is provided below the water suction roller group (2), and the water receiving box (4) is used to receive the drainage generated by the water separator (3) squeezing the water suction roller.

4. The thick-plate dewatering device according to claim 3, characterized in that, The water separator (3) extends between the water suction roller group (2) and the water receiving box (4). The water separator (3) is provided with a drain hole (301). The water generated by the water separator (3) squeezing the water suction roller is discharged to the water receiving box (4) through the drain hole (301).

5. The thick-plate dewatering device according to claim 4, characterized in that, The main body of the extrusion surface (302) of the water remover (3) that contacts the water suction roller is arc-shaped, and the extrusion surface (302) gradually approaches the rotation axis of the connecting rod (201) from bottom to top; When the positions of the water-absorbing roller A (202) and the water-absorbing roller B (203) are exchanged, the water-absorbing roller that moves from the working position to the drying position gradually approaches the extrusion surface (302) during its movement and is eventually squeezed and deformed by the extrusion surface (302) to remove water.

6. The thick-plate dewatering device according to claim 5, characterized in that, The support mechanism (1) includes a support frame (101) and a cylinder (102). The extension and retraction of the cylinder (102) can cause the support frame (101) to move, thereby adjusting the distance between the water absorption roller group (2) and the thick sheet (5).

7. The thick-plate dewatering device according to claim 6, characterized in that, The support frame (101) is connected to the water separator (3) and the water receiving box (4). The extension and retraction of the cylinder (102) can cause the water separator (3), the water receiving box (4) and the support frame (101) to move synchronously.

8. The thick-plate dewatering device according to any one of claims 1 to 7, characterized in that, The water-absorbing roller group (2) is arranged on one or both sides of the thick sheet (5).

9. The thick-plate dewatering device according to any one of claims 1 to 7, characterized in that, Both the water-absorbing roller A (202) and the water-absorbing roller B (203) are water-absorbing rubber rollers.

10. The thick-plate dewatering device according to any one of claims 1 to 7, characterized in that, The drive device (204) is connected to the control system, which can trigger the drive device (204) to work at regular intervals so that the water-absorbing roller A (202) and the water-absorbing roller B (203) can exchange between the working position and the drying position.

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