Tensile strength detection equipment for heat transfer printing film

Abstract

The invention relates to the technical field of film tensile strength detection, in particular to a tensile strength detection device for a heat transfer film, which comprises a base, the top of the base is connected with a fixed plate, the top of the base is provided with a linear motor, the linear motor is connected with a movable plate, and the movable plate and the fixed plate are both provided with tension sensors. Electric clamps are mounted on the two tension sensors, a U-shaped frame is connected to the top of the base, a placing table for placing a sample is arranged on the upper portion of the U-shaped frame in a sliding mode, a cutting mechanism for slitting the sample is arranged on the placing table, and a pushing mechanism is arranged on the U-shaped frame and used for pushing the top plate to move upwards to jack up the sample. According to the device, the thermal transfer film samples can be automatically cut into strips, and the thermal transfer film samples can be automatically switched, so that the tensile strength of the thermal transfer film can be continuously detected, the detection waiting time is greatly shortened, the detection period is greatly shortened, and the detection efficiency is greatly improved.

Description

Technical Field

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

[0002] A thermal transfer film is a special thin film used to transfer patterns, texts, or images onto the surfaces of different materials. This technology is widely applied in industries such as textiles, ceramics, and metal processing. Through the action of heat and pressure, the coating on the thermal transfer film can be transferred onto the target object.

[0003] In order to ensure that the thin film can withstand a certain amount of tension during the thermal transfer process without breaking or deforming, and to meet specific application requirements (such as flexibility and tensile strength), it is necessary to conduct tensile strength detection on the thermal transfer film. Currently, a thin film tensile strength testing machine is usually used to complete this task. This device consists of a mainframe, electric clamps, sensors, a control system, a measurement system, etc., and measures the tensile strength of the thermal transfer film by applying a longitudinal tensile load. However, in practical applications, the existing thin film tensile strength testing machine has the following deficiencies: 1. Lack of an automatic strip cutting mechanism: To ensure the consistency of the thermal transfer film during detection, it is necessary to pre-cut large thermal transfer films into multiple strip samples. However, the existing thin film tensile strength testing machine cannot automatically complete this process. It is necessary to manually use a strip cutting instrument to process the thermal transfer film and then place it in the testing machine for testing. In this way, it is necessary to manually transfer the thermal transfer film between two devices, which not only takes time but also reduces the overall detection efficiency.

[0004] 2. Lack of an automatic specimen switching mechanism: To obtain accurate and reliable test data and comprehensively evaluate the tensile properties of the thermal transfer film, a new specimen needs to be replaced for multiple tests after each test. The current testing machine does not support automatic specimen replacement, which means that the entire process requires manual intervention, increasing the test cycle and reducing efficiency. In addition, frequent manual operations may also increase the risk of accidental injuries and affect safety. Summary of the Invention

[0005] The purpose of the present invention is to provide a tensile strength detection device for thermal transfer films that can not only automatically cut the specimen into strips but also automatically switch specimens to solve the above problems.

[0006] To achieve the above object, the present invention provides the following technical solution: A tensile strength detection device for a thermal transfer film, comprising a base, a fixing plate connected to the top of the base, a linear motor installed on the top of the base, a movable plate connected to the linear motor, tensile sensors installed on both the movable plate and the fixing plate, electric clamps installed on both tensile sensors, a U-shaped frame connected to the top of the base and located between the two electric clamps, a placement table for placing specimens slidably provided on the upper part of the U-shaped frame, a cutting mechanism for cutting specimens provided on the placement table, the cutting mechanism comprising a lifting frame connected above the placement table through a telescopic rod, cutting knives connected at intervals to the bottom of the lifting frame, a driving member installed on the placement table for driving the lifting frame to drive the cutting knives to lift and cut the specimens, a top plate provided on the placement table, a through hole for the top plate to lift provided on the placement table, a pushing mechanism provided on the U-shaped frame for pushing the top plate upward to jack up the specimen, and a driving assembly provided inside the U-shaped frame for driving the placement table to move horizontally back and forth.

[0007] Preferably, the lower bottom surface of the top plate is a plane, the upper top surface is an arc surface, the middle part of the cutting knife is an arc section, and both sides are horizontal sections.

[0008] Preferably, the electric clamp comprises a fixed clamp block connected to the tensile sensor, the shape of the fixed clamp block is L-shaped, a movable clamp block is slidably connected to the inner side wall of the L-shaped fixed clamp block, and a cylinder for driving the movable clamp block to lift is installed at the bottom of the fixed clamp block.

[0009] Preferably, the pushing mechanism comprises a push plate rotatably connected to the inner side of the U-shaped frame through a rotating shaft, the push plate is located below the top plate, a lifting plate is connected to the movable clamp block of the electric clamp on the same side as the fixing plate, a cam is connected to one end of the rotating shaft close to the lifting plate, a slotted hole is opened at the eccentric position of the cam, and a short shaft located in the slotted hole is connected to the lower part of the lifting plate.

[0010] Preferably, a pressing rod is connected to the movable clamp block of one of the electric clamps for pressing down the specimen so that both ends of the specimen enter the two electric clamps respectively.

[0011] Preferably, hollow rods are installed at intervals on the lifting frame, the hollow rods and the cutting knives are arranged alternately, a pressing rod for pressing the specimen is slidably connected inside the hollow rod, and a spring is connected between the pressing rod and the hollow rod.

[0012] Preferably, the driving assembly comprises two driving motors respectively installed on the inner walls of both sides of the U-shaped frame, gears are connected to the output shafts of the driving motors, two racks are connected to the bottom of the placement table, and the two racks are respectively engaged with the two gears.

[0013] Preferably, baffles are connected to the sides of the fixing plate and the movable plate close to each other for preventing the specimen after being broken from entering the linear motor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the cooperation of the placement table, the top plate and the cutting mechanism, large thermal transfer film specimens can be cut into multiple strip samples, realizing automatic strip cutting of the thermal transfer film specimens. There is no need for manual operation to transfer the thermal transfer film specimens between the strip cutting instrument and the tensile strength testing equipment, thus saving time and effort and improving work efficiency. Through the pushing mechanism, the top plate can be jacked up to jack up the thermal transfer film specimen, so that the two ends of the tested thermal transfer film specimen are moved out of the two electric clamps. Through the driving assembly, the placement table can be driven to drive the top plate to move horizontally, so as to move the tested thermal transfer film specimen away from the electric clamp and move the next thermal transfer film specimen to be tested to align with the electric clamp. The top plate moves down to release the thermal transfer film specimen, and the two ends of the thermal transfer film specimen aligned with the electric clamp naturally move into the two electric clamps respectively, realizing automatic switching of the thermal transfer film specimen. There is no need for manual switching of the thermal transfer film specimen, thus saving more time and effort, further improving work efficiency, reducing manual intervention, reducing the risk of accidental injury, and improving safety. Therefore, the present invention can not only automatically cut the thermal transfer film specimen into strips, but also automatically switch the thermal transfer film specimen, and then can continuously carry out the tensile strength detection operation of the thermal transfer film, greatly shortening the detection waiting time, greatly reducing the detection cycle, and greatly improving the detection efficiency.

[0015] 2. The lower pressing rod can press down the thermal transfer film specimen aligned with the electric clamp, so that the two ends of the thermal transfer film specimen respectively enter the two electric clamps, ensuring that the thermal transfer film specimen can be firmly clamped by the electric clamp, thereby ensuring the smooth completion of the tensile strength detection.

[0016] 3. Through the cooperation of the hollow rod and the spring, not only can the pressing rod press and fix the thermal transfer film specimen to prevent the thermal transfer film specimen from shifting when being cut by the cutting knife, thus ensuring the accuracy of the cutting of the thermal transfer film specimen, but also the thermal transfer film specimen can be pushed down from the cutting knife to prevent the thermal transfer film specimen from adhering to the cutting knife and moving up with the cutting knife, and then ensuring the smooth progress of the tensile strength detection operation of the thermal transfer film specimen. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2 It is a connection schematic diagram of the electric clamp, the U-shaped frame, the placement table, the top plate and the driving assembly of the present invention.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the electric clamp of the present invention.

[0020] Figure 4Schematic perspective view of the placement table, top plate and cutting knife of the present invention.

[0021] Figure 5 Schematic installation view of the cutting mechanism, pushing mechanism and driving component of the present invention.

[0022] Figure 6 Schematic perspective view of the pushing mechanism and driving component of the present invention.

[0023] Figure 7 Schematic installation view of the pressing rod, hollow rod, pressing lever and spring of the present invention.

[0024] Figure 8 Schematic installation view of the baffle of the present invention.

[0025] In the figure: 1 - base, 2 - fixed plate, 3 - linear motor, 4 - movable plate, 5 - tension sensor, 6 - electric fixture, 61 - fixed clamping block, 62 - cylinder, 63 - movable clamping block, 7 - U-shaped frame, 71 - guide block, 8 - placement table, 80 - through opening, 81 - U-shaped table, 82 - slotted slide plate, 83 - guide rod, 90 - telescopic rod, 91 - driving member, 92 - lifting frame, 921 - cross plate, 922 - inverted U-shaped plate, 93 - cutting knife, 10 - top plate, 111 - rotating shaft, 112 - pushing plate, 113 - cam, 114 - one-word slot, 115 - lifting plate, 116 - short shaft, 121 - driving motor, 122 - gear, 123 - rack, 13 - pressing rod, 14 - hollow rod, 15 - pressing lever, 16 - spring, 17 - baffle, 18 - specimen. Detailed implementation mode

[0026] See Figures 1 - 3, A tensile strength detection device for a thermal transfer film, comprising a base 1. A fixed plate 2 is connected to the right side of the top of the base 1. A linear motor 3 is installed on the top of the base 1 and is located on the left side of the fixed plate 2. A movable plate 4 is connected to the slider of the linear motor 3. Tensile sensors 5 are installed on the upper parts of the mutually approaching sides of the movable plate 4 and the fixed plate 2. Electric clamps 6 are installed on both tensile sensors 5. The electric clamp 6 includes a fixed clamp block 61 connected to the tensile sensor 5. The shape of the fixed clamp block 61 is L-shaped. A movable clamp block 63 is slidably connected to the inner side wall of the L-shaped fixed clamp block 61 through a chute. A cylinder 62 is installed at the bottom of the fixed clamp block 61. The piston rod of the cylinder 62 penetrates the fixed clamp block 61 and is connected to the movable clamp block 63 to drive the movable clamp block 63 to move up and down. A U-shaped frame 7 is connected to the top of the base 1 and is located between the two electric clamps 6. A receiving groove for accommodating the linear motor 3 is opened in the lower part of the U-shaped frame 7. L-shaped guide blocks 71 are connected to the upper parts of the inner walls on the left and right sides of the U-shaped frame 7. A placement table 8 for placing the thermal transfer film specimen 18 is slidably provided on the upper part of the U-shaped frame 7. The placement table 8 includes a U-shaped table 81, a slotted slide plate 82, and a guide rod 83. The U-shaped table 81 is slidably arranged on the top of the U-shaped frame 7. The bottom of the U-shaped table 81 is connected to two left and right slotted slide plates 82 located inside the U-shaped frame 7. The two slotted slide plates 82 are respectively slidably connected to the two L-shaped guide blocks 71 through the slots thereon. The L-shaped guide blocks 71 guide the front and back movement of the slotted slide plates 82 to ensure that the entire placement table 8 moves back and forth smoothly. The bottom of the U-shaped table 81 is connected to two groups of guide rods 83. The two groups of guide rods 83 are located between the two slotted slide plates 82. The number of guide rods 83 in each group is two. The two guide rods 83 in each group are symmetrically arranged front and back. A top plate 10 for jacking up the thermal transfer film specimen 18 is slidably connected between the two groups of guide rods 83. A through hole 80 for the top plate 10 to move up and down is opened on the U-shaped table 81. A cutting mechanism for cutting the thermal transfer film specimen 18 is provided on the U-shaped table 81. A pushing mechanism is provided on the U-shaped frame 7 for pushing the top plate 10 to move up to jack up the thermal transfer film specimen 18. A driving assembly for driving the slotted slide plates 82 to move back and forth is provided inside the U-shaped frame 7.

[0027] See Figures 4 - 5, the cutting mechanism includes two left and right telescopic rods 90 connected to the rear side of the U-shaped table 81. A lifting frame 92 is connected between the two telescopic rods 90 and is located above the U-shaped table 81. The lifting frame 92 includes two cross plates 921 and three inverted U-shaped plates 922. The two cross plates 921 are respectively connected to the two telescopic rods 90. The three inverted U-shaped plates 922 are evenly spaced from front to back and connected between the two cross plates 921. The bottom of each of the three inverted U-shaped plates 922 is connected with a cutter 93 for slitting the heat transfer film sample 18. Two driving members 91 are connected to the front side of the U-shaped table 81. The two driving members 91 are respectively connected to the two cross plates 921 on the lifting frame 92 to drive the lifting frame 92 to drive the cutter 93 to lift and slit the heat transfer film sample 18. In a specific implementation, the driving member 91 is an electric push rod. The lower bottom surface of the top plate 10 is a plane, and the upper top surface is an arc surface. The middle part of the cutter 93 is an arc section, and the left and right sides are horizontal sections. The upper top surface of the top plate 10 is designed as an arc surface and is matched with the cutter 93 with an arc section in the middle and horizontal sections on the left and right sides, which can completely cut off the heat transfer film sample 18 during the slitting process without manual secondary shearing. The design of the upper top surface of the top plate 10 being an arc surface enables the heat transfer film sample 18 lifted upward to form an arc arch, providing a large falling space. In this way, after the top plate 10 moves downward to release the heat transfer film sample 18, the two ends of the heat transfer film sample 18 can naturally move into the fixed clamp block 61 and the movable clamp block 63 of the two electric clamps 6 respectively without additional position adjustment. This design ensures that the heat transfer film sample 18 can be accurately and firmly clamped, which is beneficial to the smooth progress of the subsequent tensile strength detection operation.

[0028] See Figures 5 - 6 , the pushing mechanism includes a rotating shaft 111 rotatably connected to the U-shaped frame 7. A push plate 112 is connected to the rotating shaft 111 and is located inside the U-shaped frame 7. The push plate 112 is located below the top plate 10. The right end of the rotating shaft 111 is connected with a cam 113. A slotted hole 114 is opened at the eccentric position of the cam 113. The top of the movable clamp block 63 of the right electric clamp 6 is connected with an L-shaped lifting plate 115. A short shaft 116 located in the slotted hole 114 is connected to the lower part of the lifting plate 115.

[0029] See Figures 5 - 6 , the driving assembly includes two driving motors 121 respectively installed on the inner walls of the left and right sides of the U-shaped frame 7. A gear 122 is connected to the output shaft of the driving motor 121. Two racks 123 are connected to the bottom of the placing table 8. The bottom of each of the two slotted sliding plates 82 on the placing table 8 is connected with a rack 123. The two racks 123 are respectively engaged with the two gears 122.

[0030] Initially, the top plate 10 is pushed upward by the push plate 112, and the arc surface on the upper surface of the top plate 10 is higher than the U-shaped table 81 on the placing table 8. First, place the large thermal transfer film sample 18 on the top plate 10. The middle part of the thermal transfer film sample 18 is then pushed upward by the top plate 10 to form an arc-shaped bulge. The two ends of the thermal transfer film sample 18 are respectively attached to the inner bottom surface of the U-shaped table 81 on the placing table 8, and the two ends of the thermal transfer film sample 18 are not located between the fixed clamping block 61 and the movable clamping block 63 of the electric fixture 6, so as to ensure that the subsequent thermal transfer film sample 18 is completely cut during the strip cutting process. Then, control the driving member 91 to drive the lifting frame 92 to drive the cutting knife 93 to move downward and upward reciprocally. The three cutting knives 93 move downward and cooperate with the top plate 10 and the U-shaped table 81 to cut the large thermal transfer film sample 18 into four strip-shaped samples. Then, control the air cylinder 62 to drive the movable clamping block 63 to move downward. The downward movement of the right movable clamping block 63 drives the lifting plate 115 to move downward. The downward movement of the lifting plate 115 pushes the cam 113 to rotate backward and downward through the short shaft 116. The short shaft 116 then slides in the one-word groove 114 of the cam 113, thereby driving the rotating shaft 111 to drive the push plate 112 to rotate backward and downward to release the top plate 10. Under the action of its own gravity, the top plate 10 moves downward to release the thermal transfer film sample 18. Under the action of its own gravity, the thermal transfer film sample 18 moves downward, so that the two ends of the thermal transfer film sample 18 at the forefront (the thermal transfer film sample 18 aligned with the electric fixture 6) can naturally move into the fixed clamping block 61 and the movable clamping block 63 of the two electric fixtures 6 respectively. After the end of the thermal transfer film sample 18 moves into the fixed clamping block 61 and the movable clamping block 63, the movable clamping block 63 continues to move downward to clamp and fix the end of the thermal transfer film sample 18 on the fixed clamping block 61.

[0031] Subsequently, control the linear motor 3 to drive the movable plate 4 to move leftward, so as to drive the left electric fixture 6 to move leftward through the left tension sensor 5, apply a tensile force to the thermal transfer film sample 18, and perform tensile strength detection on the thermal transfer film sample 18. The magnitude of the tensile force can be detected in real time through the tension sensor 5. Electrically connect the tension sensor 5 to the display screen, and the tension value can be transmitted to the display screen for display, so as to facilitate the detection personnel to master the magnitude of the tensile force on the thermal transfer film sample 18. After a tensile strength detection is completed, first control the air cylinder 62 to drive the movable clamping block 63 to move upward to release the thermal transfer film sample 18. The upward movement of the right movable clamping block 63 drives the lifting plate 115 to move upward. The upward movement of the lifting plate 115 pushes the cam 113 to rotate forward and upward through the short shaft 116, thereby driving the rotating shaft 111 to drive the push plate 112 to rotate forward and upward to push the top plate 10 upward. The upward movement of the top plate 10 pushes the thermal transfer film sample 18 upward, so that the two ends of the detected thermal transfer film sample 18 are moved out of the two electric fixtures 6.

[0032] Then, control the driving motor 121 to drive the gear 122 to rotate. The rotation of the gear 122 pushes the rack 123 to drive the slotted slide plate 82 to move forward, thereby driving the entire placement table 8 to move forward, and then driving the cutting mechanism, the top plate 10, and the heat transfer film specimen 18 to move forward. In this way, the heat transfer film specimen 18 that has completed the detection is moved away from the electric fixture 6, and the next heat transfer film specimen 18 to be detected is moved forward to align with the electric fixture 6. Then, control the air cylinder 62 to drive the movable clamping block 63 to move downward, so that the top plate 10 moves downward to release the heat transfer film specimen 18. The two ends of the heat transfer film specimen 18 aligned with the electric fixture are then naturally moved into the two electric fixtures 6 respectively, realizing the automatic switching of the heat transfer film specimen 18. When the detection of the last heat transfer film specimen 18 is completed, control the driving motor 121 to drive the gear 122 to reverse. The reverse rotation of the gear 122 pushes the rack 123 to drive the slotted slide plate 82 to move backward and reset, thereby driving the entire placement table 8 and its components to move backward and reset.

[0033] In this way, through the cooperation of the placement table 8, the top plate 10, and the cutting mechanism, the device can cut the large heat transfer film specimen 18 into four strip-shaped samples, realizing the automatic strip cutting of the heat transfer film specimen 18. There is no need for manual operation to transfer the heat transfer film specimen 18 between the strip cutting instrument and the tensile strength testing equipment, which can save time and effort and improve work efficiency. Through the pushing mechanism, the top plate 10 can be jacked up to jack up the heat transfer film specimen 18, so that the two ends of the heat transfer film specimen 18 that has completed the detection are moved out of the two electric fixtures 6. Through the driving component, the placement table 8 can be driven to drive the top plate 10 to move horizontally, so as to move the heat transfer film specimen 18 that has completed the detection away from the electric fixture 6, and move the next heat transfer film specimen 18 to be detected to align with the electric fixture 6. The top plate 10 moves downward to release the heat transfer film specimen 18, and the two ends of the heat transfer film specimen 18 aligned with the electric fixture 6 are naturally moved into the two electric fixtures 6 respectively, realizing the automatic switching of the heat transfer film specimen 18. There is no need for manual switching of the heat transfer film specimen 18, which can save more time and effort, further improve work efficiency, reduce manual intervention, reduce the risk of accidental injury, and improve safety. Therefore, the device can not only automatically cut the heat transfer film specimen 18 into strips, but also automatically switch the heat transfer film specimen 18, and then can continuously perform the heat transfer film tensile strength detection operation, greatly shortening the detection waiting time, greatly reducing the detection cycle, and greatly improving the detection efficiency.

[0034] See Figures 5 - 6, a pressing rod 13 is connected to the top of the movable clamping block 63 of the right electric fixture 6. The pressing rod 13 is located to the left of the lifting plate 115. The pressing rod 13 is in a U shape. When the movable clamping block 63 of the right electric fixture 6 moves downward, it drives the pressing rod 13 to move downward, so as to press down the heat transfer film specimen 18 aligned with the electric fixture 6, so that both ends of the heat transfer film specimen 18 enter between the fixed clamping block 61 and the movable clamping block 63 of the two electric fixtures 6 respectively, ensuring that the heat transfer film specimen 18 can be firmly clamped by the electric fixture 6, so as to ensure the smooth completion of the tensile strength test.

[0035] See Figure 7 , four hollow rods 14 are evenly spaced from front to back and connected to the bottom of the two cross plates 921 on the lifting frame 92. The hollow rods 14 are arranged in a staggered manner with the inverted U-shaped plate 922 and the cutting knife 93. A pressing rod 15 for pressing the heat transfer film specimen 18 is slidably connected inside the hollow rod 14. The height of the bottom of the pressing rod 15 is lower than that of the cutting knife 93. The pressing rod 15 is in an inverted T shape. A spring 16 is sleeved on the inverted T-shaped pressing rod 15. The two ends of the spring 16 are respectively connected to the pressing rod 15 and the hollow rod 14.

[0036] When the lifting frame 92 moves downward, it drives the hollow rod 14, the pressing rod 15 and the spring 16 to move downward. Through the support of the U-shaped table 81 on the placing table 8, when the pressing rod 15 moves downward to contact the heat transfer film specimen 18, the pressing rod 15 cannot continue to move downward. Thus, the lifting frame 92 drives the hollow rod 14 to continue to move downward to compress the spring 16. Through the elastic force of the spring 16, the pressing rod 15 presses and fixes the heat transfer film specimen 18 to prevent the heat transfer film specimen 18 from displacing when the cutting knife 93 cuts the heat transfer film specimen 18 later, so as to ensure the accuracy of the cutting of the heat transfer film specimen 18. Since the spring 16 is compressed, when the lifting frame 92 drives the hollow rod 14 and the cutting knife 93 to move upward, the pressing rod 15 will not move upward synchronously with the cutting knife 93, so as to push the heat transfer film specimen 18 off the cutting knife 93 to prevent the heat transfer film specimen 18 from adhering to the cutting knife 93 and moving upward with the cutting knife 93, thereby ensuring the smooth progress of the tensile strength test operation of the heat transfer film specimen 18. When the spring 16 returns to its original state, the hollow rod 14 continues to move upward and pulls the pressing rod 15 upward to separate from the heat transfer film specimen 18.

[0037] See Figure 8 , baffles 17 are connected to the lower parts of the mutually approaching sides of the fixed plate 2 and the movable plate 4. The baffle 17 on the fixed plate 2 is located above the baffle 17 on the movable plate 4. The baffle 17 is located in the receiving groove at the lower part of the U-shaped frame 7. The baffle 17 is located above the linear motor 3. The baffle 17 can block the broken heat transfer film specimen 18 to prevent the broken heat transfer film specimen 18 from entering the linear motor 3 and affecting the normal operation of the linear motor 3.

Claims

1. A tensile strength detection device for a thermal transfer film, comprising a base (1), a fixing plate (2) is connected to the top of the base (1), a linear motor (3) is installed on the top of the base (1), a movable plate (4) is connected to the linear motor (3), tension sensors (5) are installed on both the movable plate (4) and the fixing plate (2), electric clamps (6) are installed on both of the two tension sensors (5), and it is characterized in that, At the top of the base (1), there is a U-shaped frame (7) located between two electric clamps (6). A placement table (8) for placing the specimen (18) is slidably arranged on the upper part of the U-shaped frame (7). A cutting mechanism for cutting the specimen (18) is arranged on the placement table (8). The cutting mechanism includes a lifting frame (92) connected above the placement table (8) through a telescopic rod (90). At the bottom of the lifting frame (92), cutting knives (93) are connected at intervals. A driving member (91) for driving the lifting frame (92) to drive the cutting knives (93) to lift and cut the specimen (18) is installed on the placement table (8). A top plate (10) is arranged on the placement table (8), and a through opening (80) for the top plate (10) to lift is opened on the placement table (8). A pushing mechanism is arranged on the U-shaped frame (7) for pushing the top plate (10) to move upward to jack up the specimen (18). A driving assembly for driving the placement table (8) to move horizontally back and forth is arranged inside the U-shaped frame (7).

2. The tensile strength detection device for a thermal transfer film according to claim 1, characterized in that, The lower bottom surface of the top plate (10) is a plane, and the upper top surface is an arc surface. The middle part of the cutting knife (93) is an arc section, and both sides are horizontal sections.

3. The tensile strength detection device for a thermal transfer film according to claim 1, wherein, The electric clamp (6) includes a fixed clamp block (61) connected to the tension sensor (5). The shape of the fixed clamp block (61) is L-shaped. A movable clamp block (63) is slidably connected to the inner side wall of the L-shaped fixed clamp block (61). A cylinder (62) for driving the movable clamp block (63) to lift is installed at the bottom of the fixed clamp block (61).

4. The tensile strength detection device for a thermal transfer film according to claim 3, characterized in that, The pushing mechanism includes a push plate (112) rotatably connected to the inner side of the U-shaped frame (7) through a rotating shaft (111). The push plate (112) is located below the top plate (10). A lifting plate (115) is connected to the movable clamp block (63) of the electric clamp (6) on the same side as the fixed plate (2). One end of the rotating shaft (111) close to the lifting plate (115) is connected with a cam (113). A straight slot (114) is opened at the eccentric position of the cam (113). A short shaft (116) located in the straight slot (114) is connected to the lower part of the lifting plate (115).

5. The tensile strength detection device for a thermal transfer film according to claim 3, characterized in that, A pressing rod (13) is connected to the movable clamp block (63) of one of the electric clamps (6) for pressing down the specimen (18) so that both ends of the specimen (18) enter the two electric clamps (6) respectively.

6. The tensile strength detection device for a thermal transfer film according to claim 1, characterized in that, Hollow rods (14) are installed at intervals on the lifting frame (92). The hollow rods (14) and the cutting knives (93) are arranged in a staggered manner. A pressing rod (15) for pressing the specimen (18) is slidably connected inside the hollow rod (14). A spring (16) is connected between the pressing rod (15) and the hollow rod (14).

7. The tensile strength detection device for a thermal transfer film according to claim 1, wherein, The driving assembly includes two driving motors (121) respectively installed on the inner side walls of both sides of the U-shaped frame (7). A gear (122) is connected to the output shaft of the driving motor (121). Two racks (123) are connected to the bottom of the placement table (8). The two racks (123) are respectively engaged with the two gears (122).

8. The tensile strength detection device for a thermal transfer film according to claim 1, characterized in that, Baffles (17) are connected to the sides of the fixed plate (2) and the movable plate (4) close to each other for preventing the specimen (18) after being pulled off from entering the linear motor (3).

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