A breathable film production casting machine

Abstract

The utility model relates to a kind of breathable film production casting machine, belong to breathable film production technical field, including casting machine body, the casting machine body is provided with casting roll, the top of the casting machine body is equipped with the uniform pressure component for reducing uneven phenomenon, the uniform pressure component includes the first motor and frame body fixedly connected in the top of casting machine body, the output shaft of the first motor is fixedly connected with transmission rod, the top of the transmission rod is fixedly connected with transmission gear, the left side of the transmission gear is engaged with driven gear, the inner side of the center of driven gear is fixedly connected with threaded rod.The breathable film production casting machine, the uniform pressure roller in uniform pressure component can be moved up and down according to actual production demand, the working gap with casting roll is adjusted, in production process, uniform pressure roller gently acts on the breathable film that has not yet completely cooled and solidified on the surface of casting roll with its own gravity and fine adjustment pressure, and its silica gel roller body continuously rolls and presses film.

Description

Technical Field

[0001] This utility model relates to the field of breathable membrane production technology, specifically a breathable membrane production casting machine. Background Technology

[0002] Cast films, especially breathable films, are key materials in hygiene, medical, and packaging fields, and their uniformity directly determines the performance of the final product. In the production process of breathable films, molten polymer flows out through a die and rapidly cools and solidifies on casting rollers.

[0003] However, during the casting process, due to the fluctuations in melt flow, tiny bumps or longitudinal thickness streaks easily form on the surface of the breathable film, resulting in uneven longitudinal thickness. This not only affects the appearance quality of the breathable film but also reduces its physical properties such as breathability, thus impacting the final product's performance and market competitiveness. On the other hand, during the transverse cooling and stretching of the film, uneven internal stress can be generated due to material properties and process parameters. This uneven internal stress makes the film edges prone to curling, causing difficulties in subsequent processing steps, increasing scrap rates, and raising production costs. Therefore, a breathable film casting machine is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a breathable film casting machine that reduces unevenness and solves the problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A permeable membrane production casting machine includes a casting machine body, the casting machine body is provided with casting rollers, and the top of the casting machine body is provided with a pressure equalization component for reducing unevenness.

[0007] The pressure equalization assembly includes a first motor and a frame fixedly connected to the top of the casting machine body. The output shaft of the first motor is fixedly connected to a transmission rod, and the top end of the transmission rod is fixedly connected to a transmission gear. A driven gear meshes with the left side of the transmission gear. A threaded rod is fixedly connected to the inner side of the center of the driven gear. A threaded block is threadedly connected to the outer side of the threaded rod. Fixed plates are fixedly connected to both the front and rear sides of the threaded block. A fixed block is fixedly connected between the opposite sides of the fixed plates on the front and rear sides. A connecting plate is fixedly connected to the left side of the fixed block. A second motor is fixedly connected to the back of the connecting plate. A connecting rod is fixedly connected to the output shaft of the second motor. An incomplete gear is fixedly connected to one end of the front side of the connecting rod. A connecting frame meshes with the outer side of the incomplete gear. A pressure equalization roller is fixedly connected to the bottom of the connecting frame.

[0008] Furthermore, the length and width of the threaded block are equal to the length and width of the inner side of the frame, and the threaded block is slidably connected between the inner left and right side walls of the frame.

[0009] Furthermore, the bottom end of the threaded rod passes through the top of the frame and the threaded groove of the threaded block in sequence, and is rotatably connected to the inner bottom wall of the frame.

[0010] Furthermore, the inner top and bottom walls of the connecting frame are fixedly connected with tooth blocks adapted to the incomplete gear, and the connecting frame meshes with the incomplete gear through the tooth blocks.

[0011] Furthermore, one end of the front of the connecting rod passes through the back of the connecting plate and extends to the inner side of the center of the incomplete gear, where it is fixedly connected to the incomplete gear.

[0012] Furthermore, support rods are fixedly connected to both the left and right sides of the connecting frame, and support rings are slidably connected to the outer sides of both support rods. Both support rings are fixedly connected to the front of the connecting plate.

[0013] Furthermore, the pressure equalizing roller is composed of a roller frame and a roller body, and the surface of the roller body is covered with silicone.

[0014] Compared with the prior art, this utility model provides a permeable film production casting machine, which has the following beneficial effects:

[0015] This breathable film casting machine features a pressure equalizing roller in its pressure equalizing assembly that can move up and down according to actual production needs, adjusting the working gap with the casting roller. During production, the pressure equalizing roller gently acts on the breathable film, which has not yet fully cooled and solidified, using its own weight and fine-tuning pressure. Its silicone roller continuously rolls the film, and this gentle and uniform pressure effectively flattens the tiny bumps or longitudinal thickness stripes on the film surface caused by melt flow fluctuations, thereby significantly improving the longitudinal thickness uniformity of the film. In addition, after the height is adjusted, the pressure equalizing roller can also reciprocate left and right. When the pressure equalizing roller reciprocates left and right, it provides a combing-like mechanical action for the film. This mechanical action can break up and redistribute the uneven internal stress generated by the molten film during transverse cooling and stretching, and equalize the stress accumulated at the edge of the film towards the central area. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 2 This is a rear view of the structure of this utility model;

[0018] Figure 3 This is a perspective view of the connecting plate and connecting frame in the structure of this utility model.

[0019] In the diagram: 1. Casting machine body; 101. Casting roller; 2. First motor; 3. Frame; 4. Transmission rod; 5. Transmission gear; 6. Driven gear; 7. Threaded rod; 8. Threaded block; 9. Fixing plate; 10. Fixing block; 11. Connecting plate; 12. Second motor; 13. Connecting rod; 14. Incomplete gear; 15. Connecting frame; 1501. Tooth block; 16. Even pressure roller; 17. Support rod; 18. Support ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 3 The present embodiment of a breathable film production casting machine includes a casting machine body 1, a casting roller 101 provided on the casting machine body 1, and a pressure equalization component for reducing unevenness provided on the top of the casting machine body 1.

[0022] Please see Figure 1 In this embodiment, the pressure equalization assembly includes a first motor 2 and a frame 3 fixedly connected to the top of the casting machine body 1. The output shaft of the first motor 2 is fixedly connected to a transmission rod 4. The top end of the transmission rod 4 is fixedly connected to a transmission gear 5. A driven gear 6 meshes with the left side of the transmission gear 5. A threaded rod 7 is fixedly connected to the inner side of the center of the driven gear 6. A threaded block 8 is threadedly connected to the outer side of the threaded rod 7. Fixing plates 9 are fixedly connected to both the front and rear sides of the threaded block 8. A fixing block 10 is fixedly connected between the opposite sides of the fixing plates 9 on the front and rear sides. A connecting plate 11 is fixedly connected to the left side of the fixing block 10. A second motor 12 is fixedly connected to the back of the connecting plate 11. A connecting rod 13 is fixedly connected to the output shaft of the second motor 12. An incomplete gear 14 is fixedly connected to one end of the front side of the connecting rod 13. A connecting frame 15 meshes with the outer side of the incomplete gear 14. A pressure equalization roller 16 is fixedly connected to the bottom of the connecting frame 15.

[0023] Specifically, the length and width of the threaded block 8 are equal to the length and width of the inner side of the frame 3, and the threaded block 8 is slidably connected between the inner left and right side walls of the frame 3.

[0024] It should be noted that this design ensures that the threaded block 8 can only slide smoothly up and down in the vertical direction inside the frame 3, without rotation or horizontal wobbling.

[0025] Specifically, the bottom end of the threaded rod 7 passes through the top of the frame 3 and the threaded groove of the threaded block 8 in sequence, and is rotatably connected to the inner bottom wall of the frame 3.

[0026] Specifically, the inner top and bottom walls of the connecting frame 15 are fixedly connected with tooth blocks 1501 that are adapted to the incomplete gear 14, and the connecting frame 15 meshes with the incomplete gear 14 through the tooth blocks 1501.

[0027] It should be noted that tooth blocks 1501 are provided on both the inner top wall and the inner bottom wall of the connecting frame 15, so that the incomplete gear 14 can alternately mesh with the upper and lower tooth blocks 1501 when rotating.

[0028] Specifically, one end of the connecting rod 13 passes through the back of the connecting plate 11 and extends to the inside of the center of the incomplete gear 14, where it is fixedly connected.

[0029] Specifically, support rods 17 are fixedly connected to both the left and right sides of the connecting frame 15, and support rings 18 are slidably connected to the outer sides of the two support rods 17. The two support rings 18 are fixedly connected to the front of the connecting plate 11.

[0030] It should be noted that the support rod 17 and the support ring 18 form a sliding guide pair. This mechanism suspends and restricts the connecting frame 15 on the connecting plate 11, ensuring that the connecting frame 15 can only reciprocate strictly in the horizontal direction when driven by the incomplete gear 14.

[0031] Specifically, the equalizing roller 16 is composed of a roller frame and a roller body, and the surface of the roller body is covered with silicone.

[0032] It should be noted that silicone material is characterized by high temperature resistance, softness, good elasticity, moderate coefficient of friction, and non-adhesion to molten materials. The soft silicone surface can apply gentle and uniform pressure to the film, achieving a smoothing effect rather than damaging it.

[0033] The working principle of the above embodiments is as follows:

[0034] When the first motor 2 is started, the output shaft of the first motor 2 drives the transmission rod 4 and the transmission gear 5 to rotate. The transmission gear 5 drives the driven gear 6 that meshes with it and the threaded rod 7 that is fixedly connected to the inner side of the center of the driven gear 6 to rotate. Since the threaded block 8 is restricted by the frame 3 and cannot rotate, under the action of the threaded pair, the threaded block 8 drives the connecting plate 11 to move up and down through the fixing plate 9 and the fixing block 10, thereby driving the pressure equalizing roller 16 to move up and down, thereby adjusting the working gap between the pressure equalizing roller 16 and the casting roller 101.

[0035] After the height of the equalizing roller 16 is set, the second motor 12 is started. The output shaft of the second motor 12 drives the incomplete gear 14 to rotate at a constant speed through the connecting rod 13. When the toothed part of the incomplete gear 14 rotates to the upper tooth block 1501 of the connecting frame 15 and meshes with it, it pushes the connecting frame 15 to move to the right. When the toothed part of the incomplete gear 14 disengages from the upper tooth block 1501 and rotates to mesh with the lower tooth block 1501, it pushes the connecting frame 15 to move to the left, thereby realizing the left and right reciprocating motion.

[0036] The height-adjusted pressure roller 16 gently acts on the breathable film on the surface of the casting roller 101, which has not yet fully cooled and solidified, using its own weight and fine-tuning pressure. The silicone roller body of the pressure roller 16 continuously rolls the film, which can effectively flatten the tiny bumps or longitudinal thickness stripes on the film surface caused by the fluctuation of melt flow, thereby improving the longitudinal thickness uniformity of the film. When the pressure roller 16 moves back and forth, it provides a combing mechanical action for the film, thereby breaking and redistributing the uneven internal stress generated by the molten film during transverse cooling and stretching, and homogenizing the stress accumulated at the edge of the film towards the central area, reducing the tendency of the film to curl at the edge in subsequent processes due to uneven transverse stress.

[0037] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented.

[0038] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A permeable film production casting machine, comprising a casting machine body (1), characterized in that: The casting machine body (1) is provided with casting rollers (101), and the top of the casting machine body (1) is provided with a pressure equalization component for reducing unevenness. The pressure equalization assembly includes a first motor (2) and a frame (3) fixedly connected to the top of the casting machine body (1). The output shaft of the first motor (2) is fixedly connected to a transmission rod (4). A transmission gear (5) is fixedly connected to the top of the transmission rod (4). A driven gear (6) meshes with the left side of the transmission gear (5). A threaded rod (7) is fixedly connected to the inner side of the center of the driven gear (6). A threaded block (8) is threadedly connected to the outer side of the threaded rod (7). Fixed plates (9) are fixedly connected to both the front and rear sides of the threaded block (8). A fixing block (10) is fixedly connected between opposite sides of the fixing plates (9) on both sides. A connecting plate (11) is fixedly connected to the left side of the fixing block (10). A second motor (12) is fixedly connected to the back of the connecting plate (11). A connecting rod (13) is fixedly connected to the output shaft of the second motor (12). An incomplete gear (14) is fixedly connected to one end of the front of the connecting rod (13). A connecting frame (15) meshes with the outer side of the incomplete gear (14). A pressure equalizing roller (16) is fixedly connected to the bottom of the connecting frame (15).

2. The permeable film production casting machine according to claim 1, characterized in that: The length and width of the threaded block (8) are equal to the length and width of the inner side of the frame (3), and the threaded block (8) is slidably connected between the inner left and right side walls of the frame (3).

3. The permeable film production casting machine according to claim 1, characterized in that: The bottom end of the threaded rod (7) passes through the top of the frame (3) and the threaded groove of the threaded block (8) in sequence and is rotatably connected to the inner bottom wall of the frame (3).

4. A permeable film production casting machine according to claim 1, characterized in that: The inner top and bottom walls of the connecting frame (15) are fixedly connected with tooth blocks (1501) that are adapted to the incomplete gear (14), and the connecting frame (15) meshes with the incomplete gear (14) through the tooth blocks (1501).

5. A permeable film production casting machine according to claim 1, characterized in that: One end of the front of the connecting rod (13) passes through the back of the connecting plate (11) and extends to the inner side of the center of the incomplete gear (14) and is fixedly connected to the incomplete gear (14).

6. A permeable film production casting machine according to claim 1, characterized in that: The left and right sides of the connecting frame (15) are fixedly connected with support rods (17), and the outer sides of the two support rods (17) are slidably connected with support rings (18), and the two support rings (18) are fixedly connected to the front of the connecting plate (11).

7. A permeable film production casting machine according to claim 1, characterized in that: The equalizing roller (16) is composed of a roller frame and a roller body, and the surface of the roller body is covered with silicone.

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