Compressive strength detection device for production of thermal transfer film for pen

Abstract

The invention relates to the technical field of compressive strength detection of thermal transfer printing films for pens, in particular to a compressive strength detection device for production of thermal transfer printing films for pens, which comprises a mounting box, a mounting frame, a multi-stage hydraulic cylinder, a connecting plate, a pressure sensor I and the like, and is characterized in that the mounting frame is connected to the mounting box, and the multi-stage hydraulic cylinder is mounted on the mounting frame; a connecting plate is connected to the lower end of a telescopic rod of the multi-stage hydraulic cylinder, and a first pressure sensor is installed at the bottom of the connecting plate. The thermal transfer film for the pen can be pressed through the pressing plate, the compressive strength of the thermal transfer film for the pen is detected, the thermal transfer film for the pen can be supported through the supporting plate, the thermal transfer film for the pen does not need to be manually supported and flattened by a worker, the detection efficiency can be improved, the thermal transfer film for the pen can be smoother, and the working efficiency is improved. The problems of uneven tension distribution and inconsistent pre-stretching degree of the thermal transfer film for the pen are avoided, and the accuracy of a detection result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressive strength detection of pen thermal transfer films, and particularly relates to a compressive strength detection device for the production of pen thermal transfer films. Background Art

[0002] During the production process of pen thermal transfer films, compressive strength detection is one of the core links. Through compressive strength detection, it can be evaluated whether the pen thermal transfer film can remain intact under a certain pressure, avoiding quality problems caused by breakage.

[0003] The current detection method is to use a double-clamp tensile test device. By fixing both ends of the pen thermal transfer film on two clamps respectively, applying tensile force by a driving mechanism, and at the same time cooperating with a pressure plate to apply uniform pressure to the pen thermal transfer film to simulate the combined stress state under actual working conditions. Finally, the deformation amount and rupture threshold data of the film material are collected by sensors, and the compressive strength parameters are calculated.

[0004] The pen thermal transfer film has the characteristics of high flexibility, low thickness (usually in the micron level), and smooth surface. The current clamp is designed as an open-frame structure, with a large distance between the two clamps to accommodate the vertical movement space of the pressure plate. In the initial clamping stage, due to the lack of effective support for the pen thermal transfer film, local slippage of the pen thermal transfer film is likely to occur. It is necessary for the staff to manually flatten and position the pen thermal transfer film to accurately embed the pen thermal transfer film into the clamping surface of the clamp without external interference. This process will greatly reduce the detection efficiency, and it is very difficult for manual operation to keep the pen thermal transfer film flat, resulting in problems such as uneven tension distribution and inconsistent pre-stretching degree of the pen thermal transfer film, directly affecting the accuracy of the detection results. Summary of the Invention

[0005] In view of this, the present invention provides a compressive strength detection device for the production of pen thermal transfer films, which can overcome the disadvantages that it is necessary for the staff to manually flatten and position the pen thermal transfer film to accurately embed the pen thermal transfer film into the clamping surface of the clamp without external interference. This process will greatly reduce the detection efficiency, and it is very difficult for manual operation to keep the pen thermal transfer film flat, resulting in problems such as uneven tension distribution and inconsistent pre-stretching degree of the pen thermal transfer film, directly affecting the accuracy of the detection results.

[0006] The technical solution is as follows: A compressive strength detection device for the production of pen thermal transfer films includes an installation box, an installation frame, a multi-stage hydraulic cylinder, a connecting plate, a first pressure sensor, a sliding rod, a pressing plate, a rotating plate, a first torsion spring, a vision camera, a rotating block, a pushing block, a controller, a straightening mechanism, and a supporting mechanism. An installation frame is connected to the installation box, and a multi-stage hydraulic cylinder is installed on the installation frame. The lower end of the telescopic rod of the multi-stage hydraulic cylinder is connected to a connecting plate. A first pressure sensor is installed at the bottom of the connecting plate. Two sliding rods are slidably connected to the connecting plate. The lower ends of the two sliding rods are jointly connected to a pressing plate, which is used to press the pen thermal transfer film to detect the compressive strength of the pen thermal transfer film. A rotating plate is hinged to the installation frame, and a first torsion spring is connected between the rotating plate and the installation frame. A vision camera is installed at the bottom of the rotating plate, and a rotating block is connected to the top of the rotating plate. A pushing block is connected to the connecting plate, and the pushing block contacts the rotating block. A controller is installed on the installation box. The multi-stage hydraulic cylinder, the first pressure sensor, and the vision camera are all electrically connected to the controller. The straightening mechanism is used to straighten the pen thermal transfer film, and the supporting mechanism is used to support the pen thermal transfer film.

[0007] Furthermore, the straightening mechanism includes an installation plate, a slide rail, a slider, a spring, a placement plate, a bidirectional lead screw, a stepping motor, a moving block, a pulling block, a second pressure sensor, and a clamping component. Installation plates are connected to both the left and right sides of the top of the installation box. Slide rails are connected to both the front and back sides between the two installation plates. Sliders are slidably connected to both the left and right sides inside the slide rails. Springs are connected between the sliders and the installation plates. A placement plate for placing the pen thermal transfer film is connected between the two front and back opposite sliders. Bidirectional lead screws are connected to both the front and back sides between the two installation plates. Two stepping motors are installed on the right installation plate, and the output shafts of the stepping motors are connected to the bidirectional lead screws. The left and right parts of the bidirectional lead screws are threadedly connected to moving blocks respectively. The moving blocks slide through the sliders. Pulling blocks are connected to the moving blocks respectively. Second pressure sensors are installed on the pulling blocks respectively. The stepping motors and the second pressure sensors are all electrically connected to the controller. The clamping component is used to clamp the pen thermal transfer film on the placement plate, and the pulling blocks are used to pull the sliders to move the two placement plates away from each other to straighten the pen thermal transfer film.

[0008] Furthermore, the clamping component includes clamping plates, second torsion springs, contact blocks, and pushing plates. Clamping plates are hinged to the placement plates respectively. Second torsion springs are connected between the clamping plates and the placement plates. Contact blocks are connected to both the front and back sides of the bottoms of the clamping plates. Pushing plates are connected to the moving blocks respectively. The pushing plates are used to push the contact blocks to rotate, and the contact blocks drive the clamping plates to rotate downward to clamp the pen thermal transfer film on the placement plate.

[0009] Furthermore, the supporting mechanism includes a supporting plate and a contact plate. Supporting plates are hinged to the placement plates respectively. The two supporting plates are in contact with each other. Contact plates are connected to both the front and back sides of the supporting plates. The pushing plates can support the contact plates so that the supporting plates can support the pen thermal transfer film.

[0010] Further, it further includes guide rods. Guide rods are connected to the sliders. The guide rods slide through the mounting plate in a penetrating manner, and the springs are sleeved on the guide rods.

[0011] Further, it further includes cushion blocks. Cushion blocks are symmetrically connected to the front and back on both the left and right sides of the bottom of the mounting box.

[0012] Further, on one-way lead screws, the sides of the two push plates that are close to each other are inclined downward.

[0013] Further, on the sides of the two supporting plates that are close to each other are arc surfaces.

[0014] Compared with the prior art, the present invention has the following advantages: 1. Through the pressing plate, the pen heat transfer film can be pressed to conduct a compressive strength test on the pen heat transfer film. Through the supporting plate, the pen heat transfer film can be supported, eliminating the need for manual leveling by the staff, improving the detection efficiency, making the pen heat transfer film flatter, avoiding problems such as uneven tension distribution and inconsistent pre-stretching degree of the pen heat transfer film, and improving the accuracy of the detection results.

[0015] 2. Through the controller, the telescopic rod of the multi-stage hydraulic cylinder can be controlled to pause for a period of time and then shorten, enabling the pressing plate to continuously press the pen heat transfer film, simulating static or dynamic load conditions that may be encountered during actual use and transportation, and ensuring the accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a three-dimensional structural schematic diagram of the present invention.

[0017] Figure 2 Shows a three-dimensional structural schematic diagram of the slide bar, pressing plate, rotating plate and vision camera of the present invention.

[0018] Figure 3 Shows a three-dimensional structural schematic diagram of the pressure sensor I, torsion spring I, rotating block and push block of the present invention.

[0019] Figure 4 Shows a three-dimensional structural schematic diagram of the straightening mechanism and supporting mechanism of the present invention.

[0020] Figure 5 Shows a three-dimensional structural schematic diagram of the straightening mechanism of the present invention.

[0021] Figure 6 Shows a three-dimensional structural schematic diagram of the slider, spring, moving block, pulling block, pressure sensor II and push plate of the present invention.

[0022] Figure 7 Shows a three-dimensional structural schematic diagram of the clamping plate, torsion spring II and contact block of the present invention.

[0023] Figure 8 The three-dimensional structural schematic diagram of the contact block and the push plate of the present invention is shown.

[0024] Figure 9 The three-dimensional structural schematic diagram of the supporting mechanism of the present invention is shown.

[0025] Reference numerals in the drawings: 1, mounting box; 2, mounting rack; 3, multi-stage hydraulic cylinder; 4, connecting plate; 5, pressure sensor I; 6, sliding rod; 7, pressing plate; 8, rotating plate; 9, torsion spring I; 10, vision camera; 11, rotating block; 12, pushing block; 13, controller; 141, mounting plate; 142, slide rail; 143, slider; 144, spring; 145, placing plate; 146, bidirectional lead screw; 147, stepping motor; 148, moving block; 149, pulling block; 1410, pressure sensor II; 1411, clamping plate; 1412, torsion spring II; 1413, contact block; 1414, push plate; 151, supporting plate; 152, contact plate; 16, guide rod; 17, cushion block. Detailed implementation manners

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The technical solutions of the present invention will be clearly and completely described below with reference to the drawings. It should be noted that the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Refer to Figures 1-9, A compressive strength detection device for the production of pen thermal transfer film, comprising an installation box 1, an installation frame 2, a multi-stage hydraulic cylinder 3, a connecting plate 4, a first pressure sensor 5, a sliding rod 6, a pressing plate 7, a rotating plate 8, a first torsion spring 9, a vision camera 10, a rotating block 11, a pushing block 12, a controller 13, a straightening mechanism and a supporting mechanism. In the middle of the upper part at the rear side of the installation box 1, the installation frame 2 is connected by bolts. At the upper part of the front side of the installation frame 2, the multi-stage hydraulic cylinder 3 is installed by bolts. The lower end of the telescopic rod of the multi-stage hydraulic cylinder 3 is connected by bolts to the connecting plate 4. In the middle of the bottom of the connecting plate 4, the first pressure sensor 5 is installed by bolts. The front part and the rear part of the connecting plate 4 are both slidably connected with the sliding rod 6. The lower ends of the two sliding rods 6 are jointly connected to the pressing plate 7. The middle part of the installation frame 2 is hinged with the rotating plate 8. Between the rotating plate 8 and the installation frame 2, two first torsion springs 9 are connected. At the front side of the bottom of the rotating plate 8, the vision camera 10 is installed by bolts. At the rear side of the top of the rotating plate 8, the rotating block 11 is connected. At the rear side of the connecting plate 4, the pushing block 12 is connected. The rear side of the pushing block 12 is in contact with the front side of the rotating block 11. In the middle of the front side of the installation box 1, the controller 13 is installed by bolts. The multi-stage hydraulic cylinder 3, the first pressure sensor 5 and the vision camera 10 are all electrically connected to the controller 13. The straightening mechanism is used to straighten the pen thermal transfer film, and the supporting mechanism is used to support the pen thermal transfer film.

[0029] Refer to Figures 4-8, the straightening mechanism includes a mounting plate 141, a slide rail 142, a slider 143, a spring 144, a placement plate 145, a bidirectional lead screw 146, a stepper motor 147, a moving block 148, a pulling block 149, a second pressure sensor 1410, and a clamping assembly. Both the left and right sides of the top of the mounting box 1 are bolted with mounting plates 141. The front and rear sides between the two mounting plates 141 are bolted with slide rails 142. The left and right sides inside the slide rail 142 are both slidably connected with sliders 143. A spring 144 is connected between the slider 143 and the mounting plate 141. A placement plate 145 is bolted between the two opposite sliders 143 front and rear. The front and rear sides between the two mounting plates 141 are both threadedly connected with a bidirectional lead screw 146. The bidirectional lead screw 146 is located inside the slide rail 142. The front and rear sides on the right side of the right mounting plate 141 are both bolted with a stepper motor 147. The output shaft of the stepper motor 147 and the right end of the bidirectional lead screw 146 are connected by a coupling. The left and right parts of the bidirectional lead screw 146 are both threadedly connected with moving blocks 148. The moving blocks 148 slidably penetrate the sliders 143. The thread directions of the two moving blocks 148 on the same bidirectional lead screw 146 are opposite. Therefore, the bidirectional lead screw 146 can drive the two moving blocks 148 to move in opposite directions. Pulling blocks 149 are connected to the moving blocks 148. Second pressure sensors 1410 are both bolted on the pulling blocks 149. The stepper motor 147 and the second pressure sensors 1410 are both electrically connected to the controller 13. The clamping assembly is used to clamp the pen heat transfer film on the placement plate 145. The pulling block 149 is used to pull the slider 143 to move the two placement plates 145 away from each other to straighten the pen heat transfer film.

[0030] Refer to Figures 4-8 , the clamping assembly includes clamping plates 1411, second torsion springs 1412, contact blocks 1413, and push plates 1414. Clamping plates 1411 are hinged on the mutually remote sides of the two placement plates 145. There are rubber layers on the tops of the placement plates 145. There are rubber layers on the mutually close sides of the two clamping plates 1411. The rubber layers have a relatively high friction coefficient, which can improve the friction force between the placement plate 145, the clamping plates 1411, and the pen heat transfer film to ensure the stability of the pen heat transfer film. Two second torsion springs 1412 are connected between the clamping plates 1411 and the placement plates 145. The front and rear sides of the bottoms of the clamping plates 1411 are both connected with contact blocks 1413. The mutually close sides of the front and rear moving blocks 148 are both connected with push plates 1414.

[0031] Refer to Figure 4 and Figure 9, the supporting mechanism includes a supporting plate 151 and a contact plate 152. The supporting plates 151 are hinged to the mutually approaching sides of the two placing plates 145. The two supporting plates 151 are in contact with each other, and the mutually approaching sides of the two supporting plates 151 are both arc surfaces to ensure that the two supporting plates 151 can rotate downward normally. The contact plates 152 are connected to the front and rear sides of the supporting plate 151. The top of the pushing plate 1414 is in contact with the bottom of the contact plate 152. The mutually approaching sides of the two pushing plates 1414 on the same bidirectional lead screw 146 are both inclined downward, so that the pushing plate 1414 can better push the contact plate 152.

[0032] Initially, the pushing block 12 pushes the rotating block 11, and the first torsion spring 9 is in a deformed state. The staff places the pen heat transfer film on the two placing plates 145. The pushing plate 1414 supports the contact plate 152, keeping the contact plate 152 in a horizontal state, so that the supporting plate 151 can be kept horizontal, enabling the supporting plate 151 to support the pen heat transfer film, avoiding the drooping of the pen heat transfer film, eliminating the need for the staff to manually level the pen heat transfer film, improving the detection efficiency, and making the pen heat transfer film flatter, avoiding problems such as uneven tension distribution and inconsistent pre-stretching degree of the pen heat transfer film, and improving the accuracy of the detection results. Subsequently, the stepping motor 147 is started. The output shaft of the stepping motor 147 drives the bidirectional lead screw 146 to rotate. The bidirectional lead screw 146 drives the moving block 148 to move. The moving block 148 drives the pulling block 149 and the pushing plate 1414 to move. The pushing plate 1414 will push the contact block 1413, causing the contact block 1413 to rotate. The contact block 1413 drives the clamping plate 1411 to rotate downward. The clamping plate 1411 can clamp the pen heat transfer film on the placing plate 145, and the second torsion spring 1412 deforms. Subsequently, the pushing plate 1414 will disengage from the contact plate 152. The supporting plate 151 rotates downward under the action of its own gravity. Then the pulling block 149 will pull the sliding block 143, causing the sliding block 143 to move. The spring 144 compresses. The sliding block 143 drives the two placing plates 145 to move away from each other, straightening the pen heat transfer film. The second pressure sensor 1410 is in direct contact with the sliding block 143. The second pressure sensor 1410 will sense the pressure value. When the pressure value sensed by the second pressure sensor 1410 reaches the preset value in the controller 13, the controller 13 will control the stepping motor 147 to turn off, and then control the telescopic rod of the multi-stage hydraulic cylinder 3 to extend, driving the connecting plate 4, the first pressure sensor 5 and the pushing block 12 to move downward. The pressing plate 7 moves downward accordingly. The pushing block 12 will disengage from the rotating block 11. Under the action of the first torsion spring 9, the rotating plate 8 and the vision camera 10 rotate backward to avoid collision between the pressing plate 7 and the rotating plate 8. Subsequently, the pressing plate 7 will contact the pen heat transfer film. The sliding rod 6 and the pressing plate 7 stop moving. The first pressure sensor 5 continues to move downward. The first pressure sensor 5 will contact the pressing plate 7 and press the pressing plate 7. The pressing plate 7 presses the pen heat transfer film to perform a compressive strength test on the pen heat transfer film. The first pressure sensor 5 will sense the pressure value. When the pressure value sensed by the first pressure sensor 5 reaches the preset value in the controller 13, the controller 13 will control the telescopic rod of the multi-stage hydraulic cylinder 3 to pause for a period of time and then shorten. During this period, the pressing plate 7 keeps pressing the pen heat transfer film, simulating the static or dynamic load conditions that may be encountered during actual use and transportation to ensure the accuracy of the detection results. After a period of time, the telescopic rod of the multi-stage hydraulic cylinder 3 shortens and resets, driving the connecting plate 4, the first pressure sensor 5 and the pushing block 12 to move upward and reset. The pushing block 12 will contact the rotating block 11 and push the rotating block 11 to rotate upward.The rotating block 11 drives the rotating plate 8 and the vision camera 10 to rotate forward, rotates the vision camera 10 to directly above the thermal transfer film for pen, the vision camera 10 can capture the thermal transfer film for pen, performs appearance inspection on the thermal transfer film for pen, judges its compressive strength through the appearance of the thermal transfer film for pen. After the inspection is completed, the stepping motor 147 is started, the output shaft of the stepping motor 147 drives the bidirectional lead screw 146 to rotate in the reverse direction, the bidirectional lead screw 146 drives the moving block 148 to move, the moving block 148 drives the pulling block 149 and the pushing plate 1414 to move, the pulling block 149 no longer pulls the slider 143, under the action of the spring 144, the slider 143 will reset, the slider 143 drives the two placing plates 145 to move towards each other, the pushing plate 1414 and the contact block 1413 are separated from contact, under the action of the torsion spring two 1412, the clamping plate 1411 rotates upward, then the inclined part of the pushing plate 1414 will contact the contact plate 152 and push the contact plate 152 to rotate upward, the contact plate 152 drives the supporting plate 151 to rotate upward, and rotates the supporting plate 151 to the horizontal state.,

[0033] Refer to Figure 6 It further includes a guide rod 16. Guide rods 16 are connected to the mutually remote sides of the two sliders 143 within the same slide rail 142. The guide rods 16 slidably penetrate through the mounting plate 141, and the spring 144 is sleeved on the guide rods 16, which can prevent the spring 144 from bending. At the same time, the guide rods 16 can guide the sliders 143 to make the sliders 143 move more smoothly.

[0034] Refer to Figure 1 It further includes a cushion block 17. Cushion blocks 17 are symmetrically connected by bolts to the left and right sides of the front and rear of the bottom of the installation box 1. The cushion blocks 17 can provide stable support to ensure that the installation box 1 can be placed stably on the ground.

[0035] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all the embodiments, which only express the preferred implementation modes of the present invention, and are described in more specific and detailed manner, but cannot be construed as a limitation to the scope of the patent of the present invention.

[0036] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, quantity increases or decreases, improvements and substitutions can be made. Therefore, based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present invention.

Claims

1. A compressive strength detection device for the production of pen thermal transfer films, comprising an installation box (1) and an installation frame (2), the installation frame (2) is connected to the installation box (1), and is characterized in that, It also includes a multi-stage hydraulic cylinder (3), a connecting plate (4), a first pressure sensor (5), a sliding rod (6), a pressing plate (7), a rotating plate (8), a first torsion spring (9), a vision camera (10), a rotating block (11), a pushing block (12), a controller (13), a straightening mechanism and a supporting mechanism. The multi-stage hydraulic cylinder (3) is installed on the mounting frame (2). The lower end of the telescopic rod of the multi-stage hydraulic cylinder (3) is connected to the connecting plate (4). The first pressure sensor (5) is installed at the bottom of the connecting plate (4). Two sliding rods (6) are slidably connected to the connecting plate (4). The lower ends of the two sliding rods (6) are jointly connected to the pressing plate (7). The pressing plate (7) is used to press the pen heat transfer film to detect the compressive strength of the pen heat transfer film. The rotating plate (8) is hinged to the mounting frame (2). A first torsion spring (9) is connected between the rotating plate (8) and the mounting frame (2). The vision camera (10) is installed at the bottom of the rotating plate (8). The rotating block (11) is connected to the top of the rotating plate (8). The pushing block (12) is connected to the connecting plate (4). The pushing block (12) contacts the rotating block (11). The controller (13) is installed on the mounting box (1). The multi-stage hydraulic cylinder (3), the first pressure sensor (5) and the vision camera (10) are all electrically connected to the controller (13). The straightening mechanism is used to straighten the pen heat transfer film, and the supporting mechanism is used to support the pen heat transfer film.

2. The compressive strength detection device for the production of pen thermal transfer film according to claim 1, characterized in that, The straightening mechanism includes a mounting plate (141), a slide rail (142), a slider (143), a spring (144), a placing plate (145), a bidirectional lead screw (146), a stepping motor (147), a moving block (148), a pulling block (149), a second pressure sensor (1410) and a clamping assembly. Mounting plates (141) are connected to the left and right sides of the top of the mounting box (1). Slide rails (142) are connected to the front and rear sides between the two mounting plates (141). The left and right sides inside the slide rail (142) are slidably connected with sliders (143). Springs (144) are connected between the sliders (143) and the mounting plates (141). A placing plate (145) for placing the pen heat transfer film is connected between the front and rear opposite sliders (143). Bidirectional lead screws (146) are connected to the front and rear sides between the two mounting plates (141). Two stepping motors (147) are installed on the right mounting plate (141). The output shaft of the stepping motor (147) is connected to the bidirectional lead screw (146). The left and right parts of the bidirectional lead screw (146) are threadedly connected with moving blocks (148). The moving blocks (148) slidably penetrate the sliders (143). Pulling blocks (149) are connected to the moving blocks (148). Second pressure sensors (1410) are installed on the pulling blocks (149). The stepping motors (147) and the second pressure sensors (1410) are all electrically connected to the controller (13). The clamping assembly is used to clamp the pen heat transfer film on the placing plate (145). The pulling blocks (149) are used to pull the sliders (143) to move the two placing plates (145) away from each other to straighten the pen heat transfer film.

3. The compressive strength detection device for pen thermal transfer film production according to claim 2, characterized in that, The clamping assembly includes a clamping plate (1411), a second torsion spring (1412), a contact block (1413) and a push plate (1414). The clamping plates (1411) are hinged on the placement plate (145). A second torsion spring (1412) is connected between the clamping plate (1411) and the placement plate (145). Contact blocks (1413) are connected to both the front and rear sides of the bottom of the clamping plate (1411). Push plates (1414) are connected to the moving blocks (148). The push plates (1414) are used to push the contact blocks (1413) to make the contact blocks (1413) rotate. The contact blocks (1413) drive the clamping plates (1411) to rotate downward, and the clamping plates (1411) clamp the pen heat transfer film on the placement plate (145).

4. The compressive strength detection device for the production of pen thermal transfer film according to claim 3, characterized in that, The supporting mechanism includes a supporting plate (151) and a contact plate (152). The supporting plates (151) are hinged on the placement plate (145). The two supporting plates (151) are in contact with each other. Contact plates (152) are connected to both the front and rear sides of the supporting plate (151). The push plate (1414) can support the contact plate (152) so that the supporting plate (151) can support the pen heat transfer film.

5. The compressive strength detection device for the production of pen thermal transfer film according to claim 2, characterized in that, It further includes a guide rod (16). Guide rods (16) are connected to the sliders (143). The guide rods (16) slide through the mounting plate (141) in a penetrating manner. A spring (144) is sleeved on the guide rod (16).

6. The compressive strength detection device for pen thermal transfer film production according to claim 1, characterized in that, It further includes a cushion block (17). Cushion blocks (17) are symmetrically connected to the front and rear of the left and right sides of the bottom of the installation box (1).

7. The compressive strength detection device for the production of pen thermal transfer film according to claim 4, wherein, The sides of the two push plates (1414) on the same bidirectional lead screw (146) that are close to each other are inclined downward.

8. The compressive strength detection device for the production of pen thermal transfer film according to claim 4, characterized in that, The sides of the two supporting plates (151) that are close to each other are both arc surfaces.

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