A longitudinal stretching machine for polymer film production

Abstract

This utility model discloses a longitudinal stretching machine for polymer film production, relating to the technical field of polymer material processing equipment. It includes a longitudinal stretching box, inside which are fixedly installed several heating tubes and several flattening transition rollers arranged alternately and rotatably. A limiting seat is fixedly installed on the side of the longitudinal stretching box, and an adjusting arm is rotatably mounted on the limiting seat. A floating roller is rotatably mounted at the end of the adjusting arm. A cylinder is fixedly installed on the longitudinal stretching box, and the output shaft of the cylinder is hinged to the adjusting arm. Heating of the film is achieved through the heating tubes, and the film tension is adjusted by adjusting the floating roller. This solves the problem in the prior art where manual screwing of a threaded column is required to adjust the distance between the stretching roller and the steering roller, making precise adjustment of the film tension difficult and affecting the practicality of the device. Furthermore, in existing equipment, the heating plate directly contacts the film, affecting the film quality.

Description

Technical Field

[0001] This utility model relates to the technical field of polymer material processing equipment, specifically a longitudinal stretching machine for polymer film production. Background Technology

[0002] The longitudinal stretching machine mainly uses mechanical stretching to align the molecular chains of the film along a single direction (longitudinal direction), thereby improving the mechanical properties, thickness and uniformity of the film.

[0003] Chinese utility model patent CN216658893U discloses a film longitudinal stretching machine: it includes an outer body, the upper surface of which has a threaded hole, and a threaded post is threadedly connected to the inside of the threaded hole. A connecting seat is provided on the outer surface of one end of the threaded post, and a rolling bearing is fixedly connected to the lower surface of the connecting seat. A stretching roller is fixedly connected to the middle of the rolling bearing. The operator can turn the threaded post according to the stretching force requirement to rotate the threaded post and control the height of the rolling bearing, thereby adjusting the distance between the stretching roller and the guide roller. It can be adapted to different stretching force requirements. The film can be heated before stretching by setting up an L-shaped support rod and a heating plate.

[0004] However, existing technologies still have shortcomings: 1. The distance between the stretching roller and the guide roller needs to be adjusted by manually turning the threaded column to adjust the film tension. First, it is difficult to control the adjustment height on both sides to be consistent when manually adjusting a pair of threaded columns. Second, it is difficult to accurately adjust the height to match the tension, which affects the practicality of the device.

[0005] 2. The heating plate is directly in contact with the film, which causes friction and affects the quality of the film. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a longitudinal stretching machine for polymer film production, which solves the problem in the prior art where the distance between the stretching roller and the guide roller needs to be adjusted by manually turning a threaded column, making it difficult to achieve precise adjustment of the film tension and affecting the practicality of the device.

[0007] To achieve the above objectives, this utility model proposes a longitudinal stretching machine for polymer film production, comprising a longitudinal stretching box, a plurality of heating tubes fixedly arranged inside the longitudinal stretching box, a plurality of flattening transition rollers rotatably arranged alternately inside the longitudinal stretching box, a limiting seat fixedly arranged on the side of the longitudinal stretching box, an adjusting arm rotatably arranged on the limiting seat, a floating roller rotatably arranged at the end of the adjusting arm, and a cylinder fixedly arranged on the longitudinal stretching box, the output shaft of the cylinder being hinged to the adjusting arm.

[0008] As a further embodiment of this invention: the flattening transition roller is disposed above the heating tube.

[0009] As a further embodiment of this utility model: the two ends of the longitudinal stretching box are the film inlet end and the film outlet end, respectively. The film body enters the longitudinal stretching box from the film inlet end and is discharged from the film outlet end.

[0010] As a further embodiment of this utility model: a first power roller is rotatably arranged on the side of the film inlet end, and a first motor assembly is fixedly arranged thereon. The first motor assembly and the first power roller are connected by chain drive.

[0011] As a further embodiment of this utility model: a second power roller is rotatably provided on the side of the film outlet end, and a second motor assembly is fixedly provided thereon. The second power roller and the second motor assembly are connected by chain drive.

[0012] As a further embodiment of this utility model, several guide rollers are rotatably provided at both ends of the longitudinal pulling box.

[0013] As a further embodiment of this utility model, a speed sensor is provided on the longitudinal pulling box.

[0014] As a further embodiment of this utility model: a pair of speed sensors are provided, which are respectively located at both ends of the longitudinal pulling box.

[0015] As a further embodiment of this utility model, the longitudinal pull box is provided with a movable door.

[0016] As a further embodiment of this utility model, an exhaust vent is fixedly provided above the longitudinal pull box.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. A limit seat is fixedly installed on the side of the longitudinal tension box. An adjusting arm is rotatably installed on the limit seat. A floating roller is rotatably installed at the end of the adjusting arm. A cylinder is fixedly installed on the longitudinal tension box. The output shaft of the cylinder is connected to the adjusting arm hinge through a pin seat. When the cylinder is started, it pushes the adjusting arm to rotate, which drives the floating roller to rotate coaxially with the adjusting arm, thereby realizing the adjustment of the distance between the floating roller and the second power roller, and realizing the adjustment of the tension on the film body.

[0018] 2. By setting several flattening transition rollers and heating tubes in the longitudinal stretching box, the film body passes through the flattening transition rollers arranged in an "S" shape alternately. The heating tubes realize the heating of the film body on the flattening transition rollers. The staggered arrangement of several flattening transition rollers can increase the transmission area and preheating time of the film body in the longitudinal stretching box. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention; Figure 2This is the front view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is a rear view of the present invention; Figure 5 This is a top view of the present invention.

[0020] In the diagram: 1. Longitudinal tension box; 2. First power roller; 3. First motor assembly; 4. Second motor assembly; 5. Flattening transition roller; 6. Saliva box; 7. Film body; 8. Movable door; 9. Large drum; 10. Film head; 11. Demolding roller; 12. Floating roller; 13. Cylinder; 14. Adjusting arm; 15. Limit seat; 16. Guide roller; 17. Heating tube; 18. Exhaust vent; 19. Second power roller; 20. Speed ​​sensor. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1-5 As shown, a longitudinal stretching machine for polymer film production includes a longitudinal stretching box 1, with an inlet end and an outlet end at both ends. The film body 7 enters the longitudinal stretching box 1 through the inlet end and exits through the outlet end. A first power roller 2 is rotatably mounted on the side of the inlet end, and a first motor assembly 3 for driving the rotation of the first power roller 2 is fixedly mounted. The first motor assembly 3 drives the rotation of the first power roller 2 via a chain connection. A second power roller 19 is rotatably mounted on the side of the outlet end, and a second motor assembly 4 for driving the rotation of the second power roller 19 is fixedly mounted. The connection method between the second motor assembly 4 and the second power roller 19 is the same as that between the first power roller 2 and the first motor assembly 3. By driving the rotation of the first power roller 2 and the second power roller 19, the transmission of the film body 7 is realized. In one embodiment of this invention, a plurality of heating tubes 17 are fixedly installed inside the longitudinal tension box 1. A plurality of flattening transition rollers 5 are arranged in a staggered manner inside the longitudinal tension box 1, positioned above the heating tubes 17. The film body 7 passes alternately through the vertically arranged flattening transition rollers 5 in an "S" shape. The heating tubes 17 heat the film body 7 on the flattening transition rollers 5. The staggered arrangement of the multiple flattening transition rollers 5 increases the transmission area and preheating time of the film body 7 within the longitudinal tension box 1. An exhaust vent 18 is fixedly installed above the longitudinal tension box 1 to discharge excess heat. A movable door 8 is provided on the longitudinal tension box 1 for easy maintenance. During operation, the film status can be observed through the movable door 8. In one embodiment of this invention, a floating roller 12 is movably mounted on the side of the longitudinal tension box 1. Specifically, a limiting seat 15 is fixedly mounted on the side of the longitudinal tension box 1, and an adjusting arm 14 is rotatably mounted on the limiting seat 15. The floating roller 12 is rotatably mounted at the end of the adjusting arm 14. A cylinder 13 is fixedly mounted on the longitudinal tension box 1. The output shaft of the cylinder 13 is hinged to the adjusting arm 14 through a pin seat. When the cylinder 13 is activated, the adjusting arm 14 is pushed to rotate, causing the floating roller 12 to rotate coaxially with the adjusting arm 14, thereby adjusting the distance between the floating roller 12 and the second power roller 19, and adjusting the tension of the film body 7. A speed sensor 20 is mounted on the longitudinal tension box 1. The speed sensor 20 is located at both ends of the longitudinal tension box 1, specifically on the side close to the first power roller 2 and the second power roller 19. The speed sensor 20 monitors the linear speed of the transmission of the film body 7. In order to increase the stability of the transmission of the film body 7 and to play a guiding role, several guide rollers 16 are rotatably mounted at both ends of the longitudinal tension box 1. As one embodiment of this invention, this device can be used in conjunction with a casting equipment to achieve a complete set of manufacturing and stretching processing for the film body 7. Specifically, a casting box 6 is provided on the side of the longitudinal stretching box 1, a film head 10 is fixedly provided inside the casting box 6, and a large drum 9 is rotatably provided inside the casting box 6. The large drum 9 is located on the side of the film head 10, and a demolding roller 11 is rotatably provided below the film head 10. The slurry is extruded through the film head 10, and after being extruded from the film head 10, it is dried at high temperature on the steel strip surface of the large drum 9. The dried film body is peeled off by the demolding roller 11. A floating roller 12 is provided below the demolding roller 11. Specifically, a limiter is fixedly provided on the casting box 6. A limiting seat 15 is rotatably mounted with an adjusting arm 14. A floating roller 12 is rotatably mounted at the end of the adjusting arm 14. A cylinder 13 is fixedly mounted on the casting box 6. The output shaft of the cylinder 13 is hinged to the adjusting arm 14 through a pin seat. When the cylinder 13 is started, the adjusting arm 14 is pushed to rotate, which drives the floating roller 12 to rotate coaxially with the adjusting arm 14, thereby adjusting the distance between the floating roller 12 and the demolding roller 11, achieving the initial stretching of the film body, and the initial forming of the film body 7. Several guide rollers 16 are arranged below the floating roller 12. After passing through the floating roller 12, the film body 7 enters the longitudinal stretching box 1 through the guide transmission of the guide rollers 16.

[0023] Working principle: The slurry is extruded through the film head 10 and dried at high temperature on the steel belt surface of the large drum 9. The dried film is peeled off by the demolding roller 11 and then enters the longitudinal tension box 1 through the floating roller 13 and the guide roller 16. It enters from the film inlet end of the longitudinal tension box 1 and passes around the first power roller 2, the flattening transition roller 5, the second power roller 19, the floating roller 12, and the guide roller 16 set on the longitudinal tension box. The heating tube 17, the first motor assembly 3, and the second motor assembly 4 are started to heat and drive the film body 7. The cylinder 13 is started to push the adjusting arm 14 to rotate, which drives the floating roller 12 to rotate coaxially with the adjusting arm 14, thereby realizing the adjustment of the distance between the floating roller 12 and the second power roller 19, and realizing the adjustment of the tension of the film body 7.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A longitudinal stretching machine for polymer film production, characterized in that, The system includes a longitudinal tension box (1), which is fixedly equipped with several heating tubes (17). Several flattening transition rollers (5) are rotatably arranged inside the longitudinal tension box (1). A limiting seat (15) is fixedly arranged on the side of the longitudinal tension box (1). An adjusting arm (14) is rotatably arranged on the limiting seat (15). A floating roller (12) is rotatably arranged at the end of the adjusting arm (14). A cylinder (13) is fixedly arranged on the longitudinal tension box (1). The output shaft of the cylinder (13) is hinged to the adjusting arm (14).

2. The longitudinal stretching machine for producing a polymer film according to claim 1, wherein The flattening transition roller (5) is positioned above the heating tube (17).

3. The longitudinal stretching machine for producing a polymer film according to claim 1, wherein The longitudinal stretching box (1) has an inlet end and an outlet end at its two ends, respectively. The film body (7) enters the longitudinal stretching box (1) from the inlet end and is discharged from the outlet end.

4. The longitudinal stretching machine for producing a polymer film according to claim 3, wherein The side of the film inlet end is rotatably provided with a first power roller (2) and a first motor assembly (3) is fixedly provided. The first motor assembly (3) and the first power roller (2) are connected by chain drive.

5. The longitudinal stretching machine for polymer film production according to claim 3, characterized in that, A second power roller (19) is rotatably mounted on the side of the film outlet end, and a second motor assembly (4) is fixedly mounted thereon. The second power roller (19) and the second motor assembly (4) are connected by chain drive.

6. The longitudinal stretching machine for producing a polymer film according to claim 3, wherein The longitudinal tension box (1) is provided with several guide rollers (16) at both ends.

7. The longitudinal stretching machine for producing a polymer film according to claim 1, wherein A speed sensor (20) is installed on the longitudinal pull box (1).

8. The longitudinal stretching machine for producing a polymer film according to claim 7, wherein The speed sensor (20) is provided in pairs, which are respectively located at both ends of the longitudinal pull box (1).

9. The longitudinal stretching machine for producing a polymer film according to claim 1, wherein The longitudinal pull box (1) is equipped with a movable door (8).

10. The longitudinal stretching machine for producing a polymer film according to claim 1, wherein An exhaust vent (18) is fixedly installed above the longitudinal pull box (1).

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