A high-stability changing device for screen tension and a changing method thereof

Abstract

The application discloses a high-stability changing device for screen tension and a changing method thereof, relates to the technical field of screen printing, and comprises a bearing seat and a changing assembly. A positioning frame is arranged at the upper end of the bearing seat close to the edge, a positioning groove body is formed in the central position of the upper end of the positioning frame, a highlighted back plate is arranged at the inner bottom of the positioning groove body, and the changing assembly for screen tension changing is arranged in the middle part of the upper end of the bearing seat. Through the cooperation between the multiple assemblies, effective alignment of the screen grid and adjustment of the tension are realized. The grid-shaped laser transmitter is used to project the grid-shaped laser grid line, the laser grid line is consistent with the screen standard, that is, the grid on the laser grid line is consistent with the grid on the screen, the tension cylinder and the tension sensor are used to apply force to the screen through the adjustment of the four-corner positions, until the grid on the screen is adjusted to the degree of coincidence with the grid of the laser grid line, the change of the screen tension is completed, and the standardization of the grid area is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of screen printing, in particular to a highly stable changing device for screen tension and a changing method thereof. Background Art

[0002] Screen printing is another name for "silk screen printing". Silk screen printing is the mainstream of stencil printing. Due to its easy production method, simple printing equipment and good reproduction effect, the printed products are very popular among people. Since the 1970s, it has become a new force in my country's printing industry and has developed very rapidly. The tension of the screen needs to be adjusted before use.

[0003] The screen tension changing devices on the market are not stable enough. During the tension change process, the screen often shifts, resulting in inaccurate screen tension changes. Summary of the Invention

[0004] The object of the present invention is to provide a highly stable device for changing screen tension and a method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a highly stable device for changing screen tension and a changing method thereof, comprising a bearing seat and a changing component, wherein a positioning frame is provided at the upper end of the bearing seat near the edge, and a positioning groove is provided at the center position of the upper end of the positioning frame, and a protruding back plate is provided at the inner bottom of the positioning groove, and the changing component for changing the screen tension is placed in the middle of the upper end of the bearing seat, and the changing component comprises an outer frame, an inner frame, an adjusting tension cylinder, a tension sensor, a corner block, a fastening screw, a connecting ring, a dynamic clamping block, a rubber layer, a fixed clamping block and a screen layer, and the inner frame of the outer frame is provided. An inner frame is provided on the side, and an adjusting tension cylinder is provided at the four corners of the inner frame, one end of the adjusting tension cylinder is connected to a tension sensor, and the other end of the tension sensor is connected to a corner block, a fastening screw is provided on one side of the corner block, and one end of the fastening screw is connected to a connecting ring, and the other side of the connecting ring is connected to a dynamic clamping block, a fixed clamping block is provided on the other side of the interior of the corner block, and a rubber layer is provided on one side of the fixed clamping block and the dynamic clamping block, the interior of the corner block is connected to a screen layer, positioning components for positioning and clamping are provided at the lower parts of both sides of the positioning frame, and a benchmarking component for screen comparison is provided at the upper end of the positioning frame.

[0006] Furthermore, the corner blocks are equidistantly distributed at the four inner corners of the inner frame, and the dynamic clamping block and the corner blocks are an integrated structure.

[0007] Furthermore, the fastening screw and the dynamic clamping block are vertically distributed, and the dynamic clamping block is rotationally connected to the fastening screw through a connecting ring.

[0008] Furthermore, the rubber layer and the dynamic clamping block are tightly fitted, and the rubber layer and the dynamic clamping block are adhesively connected.

[0009] Furthermore, the positioning assembly includes a positioning cylinder, a positioning clamp, a silicone layer, a positioning slider and a positioning rail, and one end of the positioning cylinder is connected to the positioning clamp, the other side of the positioning clamp is provided with a silicone layer, and the lower end of the positioning clamp is connected to the positioning slider, and the lower end of the positioning slider is connected to the positioning rail.

[0010] Furthermore, the inner side of the positioning slider is groove-shaped, and the inner side of the positioning slider is fitted to the outer side of the positioning rail, and the positioning clamp is slidably connected between the positioning cylinder, the positioning slider and the positioning rail.

[0011] Furthermore, the positioning slider and the positioning clamp are distributed vertically, and the silicone layer and the positioning clamp are in a semi-enclosed structure.

[0012] Furthermore, the benchmarking component includes a benchmarking cylinder, a connecting carrier plate, a connecting slider, a connecting slide rail and a laser emitter. The lower end of the benchmarking cylinder is connected to the connecting carrier plate, and the two sides of the connecting carrier plate are connected to the connecting sliders. The inner side of the connecting slider is connected to the connecting slide rail, and the laser emitter is placed in the middle of the lower end of the connecting carrier plate.

[0013] Furthermore, two connecting sliders are symmetrically arranged about the center position of the connecting carrier, and the laser emitter and the connecting carrier are vertically distributed, and the connecting carrier is slidably connected between the connecting sliders and the connecting slide rails.

[0014] Furthermore, the modification method includes the following specific steps:

[0015] S1. Screen Installation

[0016] First, the screen layer is assembled inside the placement inner frame through the corner blocks, and the four sides of the screen layer are clamped by the corner blocks. The fastening screw and the movable clamping block are rotatably connected through the connecting ring, which effectively prevents the movable clamping block from rotating with the fastening screw when the fastening screw is loosened and tightened, thereby affecting the clamping strength of the movable clamping block on the screen layer. The rubber layer set on one side of the movable clamping block and the fixed clamping block increases the friction between the screen layer and the screen layer, thus completing the clamping and installation of the screen layer.

[0017] S2, Screen Positioning

[0018] The outer frame is placed on the positioning groove, and the positioning assembly is used to position and fix the outer frame. Then, the positioning slider provided at the lower end of the positioning clamp cooperates with the positioning rails provided at the front and rear ends of the upper end of the support base, so that the positioning clamp is driven by the positioning cylinder to move left and right on the X-axis linear position on the upper end of the support base. The positioning clamp completes the positioning and fixing of the outer frame, ensuring that the vertical central axes of the highlight back plate, the screen layer and the laser emitter coincide with each other, and the positioning and placement of the screen is completed.

[0019] S3, Tension Change

[0020] After the screen is installed and positioned, a grid-shaped laser grid line is projected by using a grid-shaped laser emitter. The laser grid line is consistent with the screen standard, that is, the grid on the laser grid line is consistent with the grid on the screen. Force is applied to the screen by adjusting the tension cylinders and tension sensors at the four corners. The tension of the screen layer is adjusted by adjusting the tension cylinders installed at the four corners of the inner frame, in conjunction with the tension sensors and corner blocks connected to one end of the adjusting tension cylinders. The C-shaped corner blocks are equipped with clamps of corresponding shapes inside the corner blocks to ensure that the corner blocks clamp the four sides of the screen layer, thereby ensuring the adjustment effect of the tension of the screen layer and avoiding wrinkles at the edges of the screen layer. The degree of overlap between the grid on the screen and the grid of the laser grid line is adjusted, thereby completing the change of the screen tension.

[0021] The present invention provides a highly stable device for changing screen tension and a method for changing the same, which have the following beneficial effects: the highly stable device for changing screen tension and the method for changing the same achieve effective alignment and tension adjustment of the screen grid through the mutual cooperation between multiple components, and utilize a grid-shaped laser emitter to project a grid-shaped laser mesh line. The laser mesh line is consistent with the screen standard, that is, the grid on the laser mesh line is consistent with the grid on the screen. The screen is applied with force by adjusting the tension cylinders and tension sensors at the four corners until the grid on the screen is adjusted to overlap with the grid on the laser mesh line, thereby completing the change of the screen tension and ensuring the standardization of the grid area.

[0022] 1. The present invention realizes effective alignment of the tension of the screen layer by means of a changing component arranged in the middle of the upper end of the bearing seat in cooperation with the alignment component. The adjusting tension cylinders provided at the four corners of the inner frame cooperate with the tension sensor and the corner block connected to one end of the adjusting tension cylinder to realize the tension adjustment of the screen layer. The corner blocks with a C-shaped structure cooperate with the clamping blocks of corresponding shapes arranged inside the corner blocks to ensure the clamping area of ​​the four sides of the screen layer by the corner blocks, thereby ensuring the adjustment effect of the tension of the screen layer, avoiding the occurrence of wrinkles at the edges of the screen layer, and improving the accuracy and stability of the changing device.

[0023] 2. The present invention realizes the clamping of the screen layer by means of the dynamic clamping blocks and the fixed clamping blocks arranged on both sides inside the corner blocks. The vertically distributed fastening screws and the dynamic clamping blocks can ensure the accuracy of the position between them. The fastening screws and the dynamic clamping blocks are rotatably connected through the connecting ring, which effectively prevents the dynamic clamping blocks from rotating with the fastening screws when the dynamic clamping blocks are loosened or tightened by the fastening screws, thereby affecting the firmness of the dynamic clamping blocks to the screen layer. In combination with the rubber layer arranged on one side of the dynamic clamping blocks and the fixed clamping blocks, the friction between the screen layer and the screen layer is effectively improved, thereby ensuring the stability of the screen layer during the tension adjustment process.

[0024] 3. The present invention can position and fix the change components by arranging the positioning components at the lower parts of both sides of the positioning frame, thereby ensuring the stability of the screen layer during the tension adjustment process, avoiding the position offset between the screen layer and the laser emitter, and affecting the accuracy of the screen layer grid tension alignment. The positioning slider arranged at the lower end of the positioning clamp cooperates with the positioning slide rails arranged on both sides of the front and rear ends of the upper end of the bearing seat, so that the positioning clamp can move left and right on the X-axis linear position at the upper end of the bearing seat under the drive of the positioning cylinder, thereby ensuring the accuracy of the positioning clamp in clamping the outer frame.

[0025] 4. The present invention can effectively adjust the grid tension of the screen layer by cooperating with the changing component through the alignment component provided at the upper end of the positioning frame, thereby ensuring the standard of the grid area of ​​the screen layer and the actual use effect of the screen layer. By providing connecting sliders on both sides of the connecting carrier plate and cooperating with the connecting slide rails provided on the inner side of the upper end of the positioning frame, the connecting carrier plate can slide up and down along the Z-axis linear position along the positioning frame under the drive of the alignment cylinder, thereby adjusting the distance between the laser emitter and the screen layer, so that the changing device can change the tension of screens of different specifications and sizes, thereby improving the actual use range of the changing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a highly stable device for changing screen tension and a method thereof according to the present invention;

[0027] Figure 2 This is a schematic diagram of the internal top view of the outer frame of a highly stable device for changing screen tension and a method for changing the same according to the present invention;

[0028] Figure 3 A schematic diagram of the internal side view of a corner block of a highly stable device and method for changing screen tension according to the present invention;

[0029] Figure 4 A schematic diagram of the three-dimensional structure of a corner block of a highly stable device for changing screen tension and a method thereof according to the present invention;

[0030] Figure 5The present invention is a schematic diagram of a top view of the supporting base of a highly stable device for changing screen tension and a changing method thereof.

[0031] In the figure: 1. Bearing seat; 2. Positioning frame; 3. Positioning slot; 4. Highlight back plate; 5. Change component; 501. Install outer frame; 502. Install inner frame; 503. Adjust tension cylinder; 504. Tension sensor; 505. Corner block; 506. Fastening screw; 507. Connecting ring; 508. Moving clamp; 509. Rubber layer; 5010. Fixed clamp; 5011. Screen layer; 6. Positioning component; 601. Positioning cylinder; 602. Positioning clamp; 603. Silicone layer; 604. Positioning slider; 605. Positioning rail; 7. Marking component; 701. Marking cylinder; 702. Connecting carrier; 703. Connecting slider; 704. Connecting rail; 705. Laser emitter. DETAILED DESCRIPTION

[0032] See also Figure 1-5 The present invention provides a technical solution: a highly stable device for changing screen tension and a changing method thereof, comprising a supporting base 1 and a changing component 5, wherein a positioning frame 2 is provided at the upper end of the supporting base 1 near the edge, and a positioning groove 3 is provided at the center position of the upper end of the positioning frame 2, and a prominent back plate 4 is provided at the inner bottom of the positioning groove 3, and the changing component 5 for changing the screen tension is placed at the middle of the upper end of the supporting base 1, and the changing component 5 comprises an outer frame 501, an inner frame 502, an adjusting tension cylinder 503, a tension sensor 504, a corner block 505, a fastening screw 506, a connecting ring 507, a dynamic clamping block 508, a rubber layer 509, a fixed clamping block 5010 and a screen layer 5011, and an inner frame 502 is provided on the inner side of the outer frame 501. 2, and the four corners of the inner frame 502 are penetrated by adjusting tension cylinders 503, one end of the adjusting tension cylinder 503 is connected to a tension sensor 504, and the other end of the tension sensor 504 is connected to a corner block 505, one side of the corner block 505 is penetrated by a fastening screw 506, and one end of the fastening screw 506 is connected to a connecting ring 507, and the other side of the connecting ring 507 is connected to a movable clamping block 508, a fixed clamping block 5010 is provided on the other side of the interior of the corner block 505, and a rubber layer 509 is provided on one side of the fixed clamping block 5010 and the movable clamping block 508, the interior of the corner block 505 is connected to a screen layer 5011, positioning components 6 for positioning and clamping are provided at the lower parts of both sides of the positioning frame 2, and a benchmarking component 7 for screen comparison is provided at the upper end of the positioning frame 2;

[0033] The specific operation is as follows: the changing component 5 provided in the middle of the upper end of the supporting base 1 cooperates with the marking component 7 to achieve effective marking of the tension of the screen layer 5011; the adjusting tension cylinders 503 provided at the four corners of the inner frame 502 cooperate with the tension sensor 504 and the corner block 505 connected to one end of the adjusting tension cylinder 503 to achieve the tension adjustment of the screen layer 5011; the corner block 505 with a C-shaped structure cooperates with the clamping block of corresponding shape provided inside the corner block 505, thereby ensuring that the corner block 505 clamps the four sides of the screen layer 5011, thereby ensuring the adjustment effect of the tension of the screen layer 5011, avoiding the occurrence of wrinkles at the edges of the screen layer 5011, and improving the accuracy and stability of the changing device;

[0034] See also Figure 2-5 The corner blocks 505 are evenly spaced at the four inner corners of the inner frame 502, and the movable clamping block 508 and the corner blocks 505 are integrated into a structure. The fastening screw 506 and the movable clamping block 508 are vertically distributed, and the movable clamping block 508 is rotatably connected to the fastening screw 506 through the connecting ring 507. The rubber layer 509 is tightly fitted to the movable clamping block 508, and the rubber layer 509 is adhesively connected to the movable clamping block 508.

[0035] The specific operation is as follows: the dynamic clamping blocks 508 and the fixed clamping blocks 5010 arranged on both sides of the corner block 505 realize the clamping work of the screen layer 5011; the vertically distributed fastening screws 506 and the dynamic clamping blocks 508 can ensure the accuracy of the position between them; the fastening screws 506 and the dynamic clamping blocks 508 are rotatably connected through the connecting ring 507, effectively preventing the dynamic clamping blocks 508 from rotating with the fastening screws 506 when the fastening screws 506 are loosened and tightened, thereby affecting the clamping firmness of the dynamic clamping blocks 508 on the screen layer 5011; the rubber layer 509 arranged on one side of the dynamic clamping blocks 508 and the fixed clamping blocks 5010 effectively increases the friction between the screen layer 5011 and ensures the stability of the screen layer 5011 during the tension adjustment process;

[0036] See also Figure 1 , the positioning assembly 6 includes a positioning cylinder 601, a positioning clamping block 602, a silicone layer 603, a positioning slider 604 and a positioning slide rail 605, and one end of the positioning cylinder 601 is connected to the positioning clamping block 602, the other side of the positioning clamping block 602 is provided with a silicone layer 603, and the lower end of the positioning clamping block 602 is connected to the positioning slider 604, the lower end of the positioning slider 604 is connected to the positioning slide rail 605, the inner side of the positioning slider 604 is groove-shaped, and the inner side of the positioning slider 604 is attached to the outer side of the positioning slide rail 605, and the positioning clamping block 602 is slidably connected through the positioning cylinder 601, the positioning slider 604 and the positioning slide rail 605, the positioning slider 604 and the positioning clamping block 602 are vertically distributed, and the silicone layer 603 and the positioning clamping block 602 are semi-enclosed structure;

[0037] The specific operation is as follows: the positioning components 6 provided at the lower parts of both sides of the positioning frame 2 can position and fix the change component 5, ensure the stability of the screen layer 5011 during the tension adjustment process, avoid the position offset between the screen layer 5011 and the laser emitter 705, and affect the accuracy of the grid tension calibration of the screen layer 5011; the positioning slider 604 provided at the lower end of the positioning clamp 602 cooperates with the positioning slide rails 605 provided at the front and rear ends of the upper end of the supporting base 1, so that the positioning clamp 602 can move left and right on the X-axis linear position at the upper end of the supporting base 1 under the drive of the positioning cylinder 601, thereby ensuring the accuracy of the positioning clamp 602 in clamping the outer frame 501;

[0038] See also Figure 1 The marking component 7 includes a marking cylinder 701, a connecting carrier plate 702, a connecting slider 703, a connecting slide rail 704 and a laser emitter 705. The lower end of the marking cylinder 701 is connected to the connecting carrier plate 702, and the two sides of the connecting carrier plate 702 are connected to the connecting sliders 703. The inner side of the connecting slider 703 is connected to the connecting slide rail 704. The laser emitter 705 is placed in the middle of the lower end of the connecting carrier plate 702. Two connecting sliders 703 are symmetrically arranged about the center position of the connecting carrier plate 702, and the laser emitter 705 is distributed vertically to the connecting carrier plate 702, and the connecting carrier plate 702 is slidably connected between the connecting slider 703 and the connecting slide rail 704.

[0039] The specific operation is as follows: the alignment component 7 provided at the upper end of the positioning frame 2, in conjunction with the changing component 5, can effectively adjust the grid tension of the screen layer 5011, ensuring the standard of the grid area of ​​the screen layer 5011 and the actual use effect of the screen layer 5011. By means of the connecting sliders 703 provided on both sides of the connecting carrier plate 702 and the connecting slide rails 704 provided on the inner side of the upper end of the positioning frame 2, the connecting carrier plate 702 can slide up and down along the Z-axis linear position along the positioning frame 2 under the drive of the alignment cylinder 701, thereby adjusting the distance between the laser emitter 705 and the screen layer 5011, so that the changing device can change the tension of screens of different specifications and sizes, thereby improving the actual use range of the changing device;

[0040] The change method includes the following specific steps:

[0041] S1. Screen Installation

[0042] First, the screen layer 5011 is assembled inside the placement inner frame 502 through the corner blocks 505. The four sides of the screen layer 5011 are clamped by the corner blocks 505. The fastening screw 506 and the movable clamping block 508 are rotatably connected through the connecting ring 507. This effectively prevents the movable clamping block 508 from rotating with the fastening screw 506 when the fastening screw 506 is tightened and loosened, thereby preventing the movable clamping block 508 from rotating with the fastening screw 506 and affecting the firmness of the movable clamping block 508 clamping the screen layer 5011. The rubber layer 509 provided on one side of the movable clamping block 508 and the fixed clamping block 5010 increases the friction between the screen layer 5011 and completes the clamping and installation of the screen layer 5011.

[0043] S2, Screen Positioning

[0044] The outer frame 501 is placed on the positioning groove 3, and the outer frame 501 is positioned and fixed by the positioning assembly 6. Then, the positioning slider 604 provided at the lower end of the positioning clamp 602 cooperates with the positioning slide rails 605 provided on both sides of the front and rear ends of the upper end of the support base 1, so that the positioning clamp 602 is driven by the positioning cylinder 601 to move left and right on the X-axis linear position on the upper end of the support base 1. The positioning clamp 602 completes the positioning and fixing of the outer frame 501, ensuring that the vertical central axes of the highlight back plate 4, the screen layer 5011 and the laser emitter 705 coincide with each other, and the positioning and placement of the screen is completed;

[0045] S3, Tension Change

[0046] After the screen is installed and positioned, a grid-shaped laser grid line is projected by using a grid-shaped laser emitter 705. The laser grid line is consistent with the screen standard, that is, the grid on the laser grid line is consistent with the grid on the screen. Force is applied to the screen by adjusting the tension cylinders 503 and the tension sensors 504 at the four corners. The tension of the screen layer 5011 is adjusted by adjusting the tension cylinders 503 that are arranged at the four corners of the inner frame 502, in conjunction with the tension sensors 504 and the corner blocks 505 connected to one end of the tension cylinders 503. The corner blocks 505 with C-shaped structures are matched with the clamping blocks of corresponding shapes arranged inside the corner blocks 505 to ensure that the corner blocks 505 clamp the four sides of the screen layer 5011, thereby ensuring the adjustment effect of the tension of the screen layer 5011 and avoiding wrinkles at the edges of the screen layer 5011 until the grid on the screen is adjusted to overlap with the grid of the laser grid line, thereby completing the change of the screen tension.

[0047] In summary, the highly stable device for changing the tension of the screen and the method for changing the same, when in use, first, the screen layer 5011 is assembled inside the placement inner frame 502 through the corner blocks 505, the four sides of the screen layer 5011 are clamped by the corner blocks 505, and the fastening screw 506 and the movable clamping block 508 are rotatably connected through the connecting ring 507, effectively preventing the movable clamping block 508 from rotating with the fastening screw 506 when the fastening screw 506 is loosened and tightened, thereby affecting the clamping strength of the movable clamping block 508 on the screen layer 5011. The rubber layer 509 on one side of the clamping block 508 and the fixed clamping block 5010 increases the friction between the screen layer 5011 and completes the clamping and installation work of the screen layer 5011. Then, the outer frame 501 is placed on the positioning groove 3, and the outer frame 501 is positioned and fixed by the positioning component 6. Then, the positioning slider 604 set at the lower end of the positioning clamping block 602 cooperates with the positioning slide rails 605 set at both ends of the upper end of the support base 1, so that the positioning clamping block 602 is driven by the positioning cylinder 601 to move the X-axis linear position on the upper end of the support base 1. The left and right movement on the screen is completed by positioning the outer frame 501 through the positioning clamp 602 to ensure that the vertical center axis of the highlight back plate 4, the screen layer 5011 and the laser emitter 705 coincide with each other, completing the positioning and placement of the screen. After the screen is installed and positioned, a grid-shaped laser reticle is projected by the grid-shaped laser emitter 705. The laser reticle is consistent with the screen standard, that is, the grid on the laser reticle is consistent with the grid on the screen. The tension cylinder 503 and the tension sensor 504 are adjusted to apply force to the screen at the four corners. The tension cylinder 503 and the tension sensor 504 are installed through the inner frame 50 2 The adjusting tension cylinders 503 at the four corners cooperate with the tension sensors 504 and the corner blocks 505 connected to one end of the adjusting tension cylinders 503 to adjust the tension of the screen layer 5011. The C-shaped corner blocks 505 cooperate with the clamping blocks of corresponding shapes provided inside the corner blocks 505 to ensure that the corner blocks 505 clamp the four sides of the screen layer 5011, ensure the adjustment effect of the tension of the screen layer 5011, and avoid wrinkles at the edges of the screen layer 5011 until the degree of overlap between the grid on the screen and the grid of the laser mesh line is adjusted, thereby completing the change of the screen tension.

Claims

1. A method for changing a highly stable device for changing screen tension, characterized in that: A high-stability changing device for screen tension is used, comprising a supporting seat (1) and a changing component (5), wherein a positioning frame (2) is provided at the upper end of the supporting seat (1) near the edge, and a positioning groove (3) is provided at the center position of the upper end of the positioning frame (2), and a protruding back plate (4) is provided at the inner bottom of the positioning groove (3), and the changing component (5) for changing the screen tension is placed at the middle of the upper end of the supporting seat (1), and the changing component (5) comprises an outer frame (501), an inner frame (502), an adjusting tension cylinder (503), a tension sensor (504), a corner block (505), a fastening screw (506), a connecting ring (507), a dynamic clamping block (508), a rubber layer (509), a fixed clamping block (5010) and a screen layer (5011), and the adjusting tension cylinder (5011) is penetrated at the four corners of the inner frame (502). 03), one end of the adjusting tension cylinder (503) is connected to a tension sensor (504), and the other end of the tension sensor (504) is connected to a corner block (505), a fastening screw (506) is passed through one side of the corner block (505), and one end of the fastening screw (506) is connected to a connecting ring (507), and the other side of the connecting ring (507) is connected to a movable clamping block (508), the other side of the interior of the corner block (505) is provided with a fixed clamping block (5010), and one side of the fixed clamping block (5010) and the movable clamping block (508) are both provided with a rubber layer (509), the interior of the corner block (505) is connected to a screen layer (5011), and positioning components (6) for positioning and clamping are provided at the lower parts of both sides of the positioning frame (2), and a benchmarking component (7) for screen comparison is provided at the upper end of the positioning frame (2); The modification method includes the following specific steps: S1. Screen Installation First, the screen layer (5011) is assembled inside the placement inner frame (502) through the corner block (505), and the four sides of the screen layer (5011) are clamped by the corner block (505). The fastening screw (506) and the movable clamping block (508) are rotationally connected through the connecting ring (507), effectively preventing the movable clamping block (508) from rotating with the fastening screw (506) when the fastening screw (506) is loosened and tightened, thereby preventing the movable clamping block (508) from rotating with the fastening screw (506) and affecting the firmness of the movable clamping block (508) clamping the screen layer (5011). The rubber layer (509) provided on one side of the movable clamping block (508) and the fixed clamping block (5010) is used to increase the friction between the movable clamping block (508) and the screen layer (5011), thereby completing the clamping and installation work of the screen layer (5011); S2, Screen Positioning The outer frame (501) is placed on the top of the positioning groove (3), and the inner frame (502) is provided on the inner side of the outer frame (501). The outer frame (501) is positioned and fixed by the positioning assembly (6). Then, the positioning slider (604) provided at the lower end of the positioning clamp (602) cooperates with the positioning rails (605) provided at both ends of the upper end of the support seat (1), so that the positioning clamp (602) moves left and right on the X-axis linear position at the upper end of the support seat (1) under the drive of the positioning cylinder (601). The outer frame (501) is positioned and fixed by the positioning clamp (602), ensuring that the vertical central axes of the highlight back plate (4), the screen layer (5011) and the laser emitter (705) coincide with each other, thereby completing the positioning and placement of the screen. S3, Tension Change After the screen is installed and positioned, a grid-shaped laser grid line is projected by using a grid-shaped laser emitter (705). The laser grid line is consistent with the screen standard, that is, the grid on the laser grid line is consistent with the grid on the screen. The screen is applied with force by adjusting the tension cylinder (503) and the tension sensor (504) at the four corners. The tension cylinder (503) is installed at the four corners of the inner frame (502), and the tension sensor (504) and the corner block are connected to the tension cylinder (503) at one end. (505) is used to adjust the tension of the screen layer (5011). The C-shaped corner block (505) is matched with a clamping block of a corresponding shape provided inside the corner block (505) to ensure that the corner block (505) clamps the four sides of the screen layer (5011) and ensures the adjustment effect of the tension of the screen layer (5011) to avoid wrinkles at the edge of the screen layer (5011). The degree of overlap between the grid on the screen and the grid of the laser mesh line is adjusted, thereby completing the change of the screen tension.

2. The method for changing a highly stable device for changing screen tension according to claim 1, characterized in that: The corner blocks (505) are equidistantly distributed at the four inner corners of the inner frame (502), and the movable clamping block (508) and the corner blocks (505) form an integrated structure.

3. The method for changing a highly stable device for changing screen tension according to claim 2, characterized in that: The fastening screw (506) and the movable clamping block (508) are distributed vertically, and the movable clamping block (508) is rotationally connected to the fastening screw (506) via a connecting ring (507).

4. The method for changing a highly stable device for changing screen tension according to claim 2, characterized in that: The rubber layer (509) and the dynamic clamping block (508) are tightly fitted together, and the rubber layer (509) and the dynamic clamping block (508) are adhesively connected.

5. The method for changing a highly stable device for changing screen tension according to claim 2, characterized in that: The positioning assembly (6) comprises a positioning cylinder (601), a positioning clamp (602), a silicone layer (603), a positioning slide block (604) and a positioning slide rail (605), wherein one end of the positioning cylinder (601) is connected to the positioning clamp (602), the other side of the positioning clamp (602) is provided with a silicone layer (603), the lower end of the positioning clamp (602) is connected to the positioning slide block (604), and the lower end of the positioning slide block (604) is connected to the positioning slide rail (605).

6. The method for changing a highly stable device for changing screen tension according to claim 5, characterized in that: The inner side of the positioning slider (604) is groove-shaped, and the inner side of the positioning slider (604) is attached to the outer side of the positioning rail (605), and the positioning clamp (602) is slidably connected between the positioning cylinder (601), the positioning slider (604) and the positioning rail (605).

7. The method for changing a highly stable device for changing screen tension according to claim 5, characterized in that: The positioning slider (604) and the positioning clamp (602) are distributed vertically, and the silicone layer (603) and the positioning clamp (602) are in a semi-enclosed structure.

8. The method for changing a highly stable device for changing screen tension according to claim 2, characterized in that: The alignment component (7) comprises an alignment cylinder (701), a connecting carrier plate (702), a connecting slider (703), a connecting slide rail (704) and a laser emitter (705), wherein the lower end of the alignment cylinder (701) is connected to the connecting carrier plate (702), and both sides of the connecting carrier plate (702) are connected to the connecting sliders (703), the inner side of the connecting slider (703) is connected to the connecting slide rail (704), and the laser emitter (705) is arranged in the middle of the lower end of the connecting carrier plate (702).

9. The method for changing a highly stable device for changing screen tension according to claim 8, characterized in that: Two connecting sliders (703) are symmetrically arranged about the center position of the connecting carrier (702), and the laser emitter (705) and the connecting carrier (702) are vertically distributed, and the connecting carrier (702) is slidably connected between the connecting sliders (703) and the connecting slide rails (704).

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