A film biaxial stretching setting mechanism

Abstract

The utility model relates to the technical field of film shaping, specifically to a film bidirectional stretching shaping mechanism, including base, the top fixed mounting of base has two side plates, the top symmetry of base is equipped with two guide rollers, two the guide roller rotation is connected between two side plates, and two the guide roller between is equipped with stretching assembly, the stretching assembly includes motor, center plate and limit block, the motor fixed mounting is at the surface of side plate, the number of center plate is two, and two center plates rotation is connected in the side of two side plates, the output of motor and a center plate fixed connection, the top symmetry of base is equipped with two rectification components, the utility model discloses, through setting up stretching assembly can prevent film bidirectional stress state uneven and influence the physical performance of film, and under the joint action of two rectification components, can effectively prevent the deviation of film in the process of bidirectional stretching.

Description

Technical Field

[0001] This utility model relates to the field of film shaping, and in particular to a film biaxial stretching and shaping mechanism. Background Technology

[0002] In the production process of plastic film, stretching and setting are crucial steps. This step typically involves mechanically treating the extruded film through biaxial stretching under specific temperature conditions to improve its physical properties and dimensional stability. Stretching effectively enhances the film's strength, transparency, and barrier properties, while setting helps eliminate internal stress, prevents subsequent shrinkage, and ensures that the finished product maintains shape stability and consistent performance during use. Therefore, this process has a decisive impact on the quality and application range of the final film product.

[0003] In daily work, it has been found that during the biaxial stretching process of plastic film, the tensile force on the film in both the transverse and longitudinal directions is often difficult to achieve a completely uniform distribution, resulting in a significant imbalance in the biaxial stress state. This uneven stress greatly affects the physical properties and thickness uniformity of the film. The film is prone to positional deviation during stretching, which can lead to misalignment of the film edges and inconsistent stretching areas, thereby affecting the quality of the finished product, even causing production interruptions, increasing the scrap rate, and significantly impacting production efficiency and product consistency. Utility Model Content

[0004] The purpose of this invention is to address the problem that during the biaxial stretching process of plastic films, the tensile forces on the film in both the transverse and longitudinal directions are often difficult to achieve a completely uniform distribution, resulting in a significant imbalance in the biaxial stress state. This uneven stress greatly affects the physical properties and thickness uniformity of the film, and the film is prone to positional deviation during stretching. Deviation can lead to misalignment of the film edges and inconsistent stretching areas, thereby affecting the quality of the finished product, and even causing production interruption, increasing the scrap rate, and significantly impacting production efficiency and product consistency. Therefore, this invention proposes a biaxial stretching and shaping mechanism for films.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a film biaxial stretching and shaping mechanism, including a base, two side plates fixedly installed on the top of the base, two guide rollers symmetrically arranged on the top of the base, the two guide rollers being rotatably connected between the two side plates, and a stretching assembly being provided between the two guide rollers;

[0006] The tensioning assembly includes a motor, a center plate, and limiting blocks. The motor is fixedly mounted on the surface of the side plate. There are two center plates, which are rotatably connected to the sides of the two side plates. The output end of the motor is fixedly connected to one center plate. There are four limiting blocks, which are equidistantly mounted on the surface of the side plate. Two correction assemblies are symmetrically arranged on the top of the base.

[0007] As a further embodiment of this utility model, a drive shaft is fixedly installed between the two center plates, and four long grooves are equidistantly opened on the surface of the center plates.

[0008] As a further embodiment of this utility model, each of the four limiting blocks is slidably connected to a guide rod, and a first slider is fixedly installed at the end of the guide rod, the first slider slidingly engaging with the long groove.

[0009] As a further embodiment of this utility model, a first receiving block is fixedly installed at the end of each of the two guide rods away from the first slider. A longitudinal stretching roller is rotatably connected to one side of the first receiving block. A second receiving block is fixedly installed at the end of the other two guide rods. The second receiving block is slidably connected to the side of the side plate, and a transverse stretching roller is rotatably connected to the side of the second receiving block.

[0010] As a further embodiment of this utility model, the correction assembly includes a fixing plate and a cylinder. The fixing plate is fixedly installed on the top of the base, and a first slide rail is fixedly installed on the surface of the fixing plate. The cylinder is fixedly installed on one side of the top fixing plate of the base, and a second slide rail is provided between the fixing plate and the cylinder, and the second slide rail is fixedly installed on the top of the base.

[0011] As a further embodiment of this utility model, the surface of the fixed plate is slidably connected to two second sliders, the two second sliders are symmetrically arranged, and the top of each of the two second sliders is rotatably connected to a correction roller, and the surface of the second slide rail is slidably connected to a third slider.

[0012] As a further embodiment of this utility model, the side of the third slider closest to the cylinder is fixedly connected to the piston end of the cylinder, and two connecting rods are rotatably connected to the top of the third slider, with the ends of the connecting rods rotatably connected to the bottom of the second slider.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] In this invention, a motor drives the center plate to rotate, and under the transmission of the drive shaft, the two center plates rotate together. The rotation of the center plates causes the long groove to shift, which in turn pushes the first slider, causing the four guide rods to slide evenly on the surface of the limiting block. The guide rods drive the first and second receiving blocks, causing the two longitudinal stretching rollers and the two transverse stretching rollers to move away from each other. Under the drive of the center plate, the driving force of the two longitudinal stretching rollers and the two transverse stretching rollers is made consistent, preventing the uneven bidirectional force on the film from affecting its physical properties. During the film stretching process, a cylinder can be driven to drive the third slider to slide on the surface of the second slide rail. The third slider drives the two connecting rods to deflect, thereby causing the two second sliders to move closer to each other on the surface of the first slide rail. This causes the two correction rollers to abut against the film edges and be limited. Under the combined action of the two sets of correction components, the film can be effectively prevented from shifting during bidirectional stretching. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a film biaxial stretching and shaping mechanism proposed in this utility model;

[0016] Figure 2 This is a partial sectional view of the side plate and stretching assembly of a film biaxial stretching and shaping mechanism proposed in this utility model.

[0017] Figure 3 This is a partial view of the stretching assembly of a biaxial stretching and shaping mechanism for thin films proposed in this utility model.

[0018] Figure 4 This is a partial view of the center plate and guide rod of a biaxial stretching and shaping mechanism for thin films proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of the corrective component of a film biaxial stretching and shaping mechanism proposed in this utility model.

[0020] Legend: 1. Base; 2. Side plate; 3. Guide roller; 4. Tensioning assembly; 41. Motor; 42. Center plate; 421. Drive shaft; 422. Long groove; 43. Longitudinal tensioning roller; 431. First receiving block; 44. Transverse tensioning roller; 441. Second receiving block; 45. Limiting block; 451. Guide rod; 452. First slider; 5. Correction assembly; 51. Fixed plate; 511. First slide rail; 512. Second slider; 513. Correction roller; 52. Second slide rail; 521. Third slider; 522. Connecting rod; 53. Cylinder. Detailed Implementation

[0021] Please see Figure 1-5This utility model provides a technical solution: a film biaxial stretching and shaping mechanism, including a base 1, two side plates 2 are fixedly installed on the top of the base 1, two guide rollers 3 are symmetrically arranged on the top of the base 1, the two guide rollers 3 are rotatably connected between the two side plates 2, and a stretching component 4 is provided between the two guide rollers 3.

[0022] In this embodiment: the tensioning component 4 includes a motor 41, a center plate 42 and a limiting block 45. The motor 41 is fixedly installed on the surface of the side plate 2. There are two center plates 42, and the two center plates 42 are rotatably connected to the sides of the two side plates 2. The output end of the motor 41 is fixedly connected to one center plate 42. There are four limiting blocks 45, and the limiting blocks 45 are equidistantly installed on the surface of the side plate 2. Two correction components 5 are symmetrically provided on the top of the base 1.

[0023] The correction assembly 5 includes a fixing plate 51 and a cylinder 53. The fixing plate 51 is fixedly installed on the top of the base 1. A first slide rail 511 is fixedly installed on the surface of the fixing plate 51. The cylinder 53 is fixedly installed on one side of the top fixing plate 51 of the base 1. A second slide rail 52 is provided between the fixing plate 51 and the cylinder 53, and the second slide rail 52 is fixedly installed on the top of the base 1.

[0024] To ensure that the lateral and longitudinal alignment rollers 513 are subjected to the same force, please refer to [link / reference needed]. Figure 2-4 A drive shaft 421 is fixedly installed between two center plates 42. Four long slots 422 are equidistantly opened on the surface of the center plates 42. The center plates 42 can be rotated by a drive motor 41, and the two center plates 42 rotate together under the drive of the drive shaft 421. Guide rods 451 are slidably connected to the surfaces of the four limit blocks 45. A first slider 452 is fixedly installed at the end of the guide rod 451. The first slider 452 slides in cooperation with the long slots 422. The rotation of the center plates 42 will cause the long slots 422 to shift, and the long slots 422 will push the first slider 452, so that the four guide rods 451 slide evenly on the surface of the limit blocks 45.

[0025] Two guide rods 451 are fixedly mounted with a first receiving block 431 at the end away from the first slider 452. A longitudinal stretching roller 43 is rotatably connected to one side of the first receiving block 431. A second receiving block 441 is fixedly mounted at the end of the other two guide rods 451. The second receiving block 441 is slidably connected to the side of the side plate 2, and a transverse stretching roller 44 is rotatably connected to the side of the second receiving block 441. The guide rods 451 will drive the first receiving block 431 and the second receiving block 441, so that the two longitudinal stretching rollers 43 and the two transverse stretching rollers 44 are far apart from each other. Under the drive of the center plate 42, the driving force of the two longitudinal stretching rollers 43 and the two transverse stretching rollers 44 is consistent, preventing the film from being subjected to uneven bidirectional force and affecting the physical properties of the film.

[0026] To address the issue of film misalignment during stretching, please refer to [link / reference]. Figure 5 Two second sliders 512 are slidably connected to the surface of the fixed plate 51. The two second sliders 512 are symmetrically arranged, and each of the two second sliders 512 is rotatably connected to the top of a correction roller 513. A third slider 521 is slidably connected to the surface of the second slide rail 52. The side of the third slider 521 closest to the cylinder 53 is fixedly connected to the piston end of the cylinder 53. Two connecting rods 522 are rotatably connected to the top of the third slider 521. The ends of the connecting rods 522 are rotatably connected to the bottom of the second slider 512. During the film stretching process, the cylinder 53 can be driven to drive the third slider 521 to slide on the surface of the second slide rail 52. The third slider 521 will drive the two connecting rods 522 to deflect, thereby driving the two second sliders 512 to move closer to each other on the surface of the first slide rail 511, so that the two correction rollers 513 abut against the edge of the film and limit their movement. Under the combined action of the two sets of correction components 5, the film can be effectively prevented from shifting during bidirectional stretching.

[0027] Working principle: The film enters the device beforehand via guide roller 3 and passes through transverse stretching roller 44 and longitudinal stretching roller 43. Then, motor 41 drives center plate 42 to rotate, and under the drive of transmission shaft 421, both center plates 42 rotate together. The rotation of center plate 42 causes long groove 422 to shift, which in turn pushes the first slider 452, causing the four guide rods 451 to slide evenly on the surface of limiting block 45. The guide rods 451 then drive the first receiving block 431 and the second receiving block 441, causing the two longitudinal stretching rollers 43 and the two transverse stretching rollers 44 to move away from each other. Driven by the center plate 42, the two longitudinal stretching rollers... The roller 43 and the two transverse stretching rollers 44 are driven by the same force. Under the combined action of the two longitudinal stretching rollers 43, the two transverse stretching rollers 44 and the guide roller 3, the film is stretched uniformly in both directions. During the stretching process, the cylinder 53 can drive the third slider 521 to slide on the surface of the second slide rail 52. The third slider 521 will drive the two connecting rods 522 to deflect, thereby driving the two second sliders 512 to move closer to each other on the surface of the first slide rail 511, so that the two correction rollers 513 abut against the edge of the film and limit their movement. Under the combined action of the two sets of correction components 5, the film can be effectively prevented from shifting during the bidirectional stretching process.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A film biaxial stretching and shaping mechanism, comprising a base (1), characterized in that: Two side plates (2) are fixedly installed on the top of the base (1). Two guide rollers (3) are symmetrically provided on the top of the base (1). The two guide rollers (3) are rotatably connected between the two side plates (2). A tensioning assembly (4) is provided between the two guide rollers (3). The tensioning assembly (4) includes a motor (41), a center plate (42), and a limiting block (45). The motor (41) is fixedly installed on the surface of the side plate (2). There are two center plates (42), and the two center plates (42) are rotatably connected to the sides of the two side plates (2). The output end of the motor (41) is fixedly connected to one center plate (42). There are four limiting blocks (45), and the limiting blocks (45) are equidistantly installed on the surface of the side plate (2). Two correction assemblies (5) are symmetrically provided on the top of the base (1).

2. The film biaxial stretching and shaping mechanism according to claim 1, characterized in that: A drive shaft (421) is fixedly installed between the two center plates (42), and four long slots (422) are equidistantly opened on the surface of the center plates (42).

3. The film biaxial stretching and shaping mechanism according to claim 1, characterized in that: Each of the four limiting blocks (45) has a guide rod (451) slidably connected to its surface. A first slider (452) is fixedly installed at the end of the guide rod (451), and the first slider (452) slides in cooperation with the long groove (422).

4. The film biaxial stretching and shaping mechanism according to claim 3, characterized in that: Two guide rods (451) are fixedly mounted with a first receiving block (431) at the end away from the first slider (452). A longitudinal stretching roller (43) is rotatably connected to one side of the first receiving block (431). A second receiving block (441) is fixedly mounted at the end of the other two guide rods (451). The second receiving block (441) is slidably connected to the side of the side plate (2), and a transverse stretching roller (44) is rotatably connected to the side of the second receiving block (441).

5. The film biaxial stretching and shaping mechanism according to claim 1, characterized in that: The correction assembly (5) includes a fixing plate (51) and a cylinder (53). The fixing plate (51) is fixedly installed on the top of the base (1). A first slide rail (511) is fixedly installed on the surface of the fixing plate (51). The cylinder (53) is fixedly installed on one side of the top fixing plate (51) of the base (1). A second slide rail (52) is provided between the fixing plate (51) and the cylinder (53), and the second slide rail (52) is fixedly installed on the top of the base (1).

6. The film biaxial stretching and shaping mechanism according to claim 5, characterized in that: The surface of the fixed plate (51) is slidably connected to two second sliders (512), the two second sliders (512) are symmetrically arranged, and the top of each of the two second sliders (512) is rotatably connected to a correction roller (513). The surface of the second slide rail (52) is slidably connected to a third slider (521).

7. A film biaxial stretching and shaping mechanism according to claim 6, characterized in that: The third slider (521) is fixedly connected to the piston end of the cylinder (53) on the side near the cylinder (53). Two connecting rods (522) are rotatably connected to the top of the third slider (521), and the ends of the connecting rods (522) are rotatably connected to the bottom of the second slider (512).

Images