Wear resistance tester for PVC (polyvinyl chloride) profile protective film and use method of wear resistance tester

Abstract

The invention belongs to the technical field of protective film detection, and relates to a PVC profile protective film wear resistance tester and a use method.The PVC profile protective film wear resistance tester comprises a bottom plate, side frames, connecting discs, a breathable cylinder, a friction mechanism, a marking mechanism and a placement mechanism, the side frames are connected to the two sides of the top of the bottom plate, and the connecting discs are connected to the upper portions of the two side frames; a ventilation cylinder is rotationally connected between the two connecting discs, a friction mechanism used for conducting friction on a protective film is arranged on the side frame, a marking mechanism is arranged on the friction mechanism, and a containing mechanism used for containing a protective film winding drum is arranged on the bottom plate. When the wear resistance of the protective film is tested, the protective film can be conveyed, in the conveying process, the wear resistance of the protective film is tested by applying friction force through the friction block, different force applied each time during testing is used for testing different areas on the protective film, and the accuracy of a test result is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of protective film detection and relates to a PVC profile protective film wear tester and a use method. Background Art

[0002] With the continuous development of building materials and decorative materials, PVC profiles have been widely used in building doors and windows, interior decoration, automotive industry and other fields due to their good physical properties, easy processing and molding, and low cost. In order to protect the surface quality of PVC profiles during transportation, storage and installation, a protective film is usually attached to its surface. This protective film needs to have a certain wear resistance to resist the friction damage that may occur during daily handling and construction. Therefore, the wear resistance of the protective film needs to be tested.

[0003] At present, when testing the wear resistance of a protective film, a piece of the protective film is usually rubbed repeatedly on a friction block for testing. During the reciprocating friction process, the protective film will generate heat due to friction, which may change the physical properties of the material and affect the authenticity of the test results. In addition, if the same protective film is repeatedly tested by applying friction forces of different intensities, the protective film may have some damage that is invisible to the naked eye when a smaller friction force is applied, and then when a larger friction force is applied, the protective film will be damaged along the damaged part, rather than the protective film being damaged due to the friction force of this intensity, thereby affecting the accuracy of the entire test result. Summary of the invention

[0004] In view of this, the present invention provides a PVC profile protective film wear tester and a use method.

[0005] The technical solution is: a PVC profile protective film wear tester, including a bottom plate, a side frame, a connecting plate, a breathable cylinder, a friction mechanism, a marking mechanism and a placement mechanism, the top of the bottom plate is connected to side frames on both sides, the upper parts of the two side frames are connected to connecting plates, the two connecting plates are rotatably connected with a breathable cylinder, the side frames are provided with a friction mechanism for rubbing the protective film, the friction mechanism is provided with a marking mechanism, and the bottom plate is provided with a placement mechanism for placing a protective film roll.

[0006] Furthermore, the friction mechanism includes a connecting frame, a cylinder, a guide rod, a friction block and a pressure sensor. The connecting frame is connected between the two side frames, the connecting frame is equipped with a cylinder, the telescopic rod of the cylinder is connected with a pressure sensor, the sensing end of the pressure sensor is equipped with a friction block, the friction block can resist the air tube, the guide rods are slidably connected on both sides of the connecting frame, and the friction block is connected to the guide rods.

[0007] Furthermore, the marking mechanism includes a mounting plate, a connecting plate, an electric push rod, a marking block and a control panel, wherein the mounting plate is connected between the two guide rods, the lower part of the mounting plate is slidably connected to the connecting plate, the connecting plate is embedded with a marking block, the mounting plate is mounted with an electric push rod, the telescopic rod of the electric push rod is connected to the connecting plate, a control panel is mounted on one of the side frames, and the electric push rod and the pressure sensor are electrically connected to the control panel.

[0008] Furthermore, the placement mechanism includes a connecting seat, a mounting shaft, a locking nut and a driving motor. Two connecting seats are connected to the top of the base plate, and the two connecting seats are rotatably connected to the mounting shafts. The mounting shafts are threadedly connected to the locking nuts. A driving motor is installed on one of the connecting seats, and the output shaft of the driving motor is connected to the mounting shaft.

[0009] Furthermore, it also includes an air suction mechanism, which includes a sleeve, an air suction pipe and an air suction frame. The sleeve is connected between the upper parts of the two side frames. Multiple air suction pipes are evenly spaced and connected to the sleeve. The multiple air suction pipes are connected with an air suction frame, and the air suction frame is closely attached to the inner wall of the air-permeable cylinder.

[0010] Furthermore, it also includes a driving mechanism, which includes an inner gear ring, a rotating shaft, a driving gear and a servo motor. The inner gear rings are rotatably connected on both sides of the air cylinder, and a rotating shaft is rotatably connected between the middle parts of the two side frames. The rotating shaft is located inside the air cylinder, and driving gears are connected on both sides of the rotating shaft. The driving gears are meshed with the inner gear ring. A servo motor is installed on one of the side frames, and the output shaft of the servo motor is connected to the rotating shaft.

[0011] Furthermore, it also includes a cleaning mechanism, which includes a connecting block, a cleaning brush cylinder and a belt transmission group. The lower parts of the two side frames are connected to the connecting blocks, and the cleaning brush cylinder is rotatably connected between the two connecting blocks. The cleaning brush cylinder is in contact with the outer surface of the air cylinder, and a belt transmission group is installed between the cleaning brush cylinder and the rotating shaft.

[0012] Furthermore, it also includes connecting rods and retaining rings. Two connecting rods are connected between the lower parts of the two side frames, retaining rings are connected between the two sides of the two connecting rods, and the two retaining rings are respectively sleeved on both sides of the air tube.

[0013] Furthermore, it also includes a smoothing mechanism, which includes a curved plate, a smoothing roller and an elastic member. The curved plate is rotatably connected between the tops of the two retaining rings, the smoothing roller is connected to the curved plate, and the elastic member is connected between the curved plate and the retaining rings.

[0014] The present invention also provides a method for using a PVC profile protective film wear tester, the specific steps are as follows:

[0015] S1: Sleeve the reel with the protective film wound around it on one of the mounting shafts, rotate the locking nut to fix the reel, and according to the above operation, sleeve another reel on another mounting shaft, pull out the protective film and wrap it around the breathable cylinder and onto another reel;

[0016] S2: The telescopic rod of the control cylinder is extended to drive the pressure sensor and the friction block to move. The friction block moves and contacts with the protective film to generate friction. The pressure sensor detects the pressure applied during friction.

[0017] S3: Control the driving motor to drive the installation shaft and the reel to rotate, and roll up the protective film. During the rolling process, the protective film rubs against the friction block to test the wear resistance of the protective film.

[0018] S4: During the test, the control cylinder continues to apply pressure. The pressure sensor detects the pressure change and sends a signal to the control panel. The control panel receives the signal to control the electric push rod to extend and retract once, driving the connecting plate and the marking block to move back and forth. The marking block marks a mark on the protective film when moving. This is repeated to complete the wear resistance test of the protective film.

[0019] The beneficial effects are: 1. When testing the wear resistance of the protective film, the present invention can transmit the protective film. During the transmission process, the friction force is applied by the friction block to test the wear resistance of the protective film. Different forces are applied each time during the test to test different areas on the protective film, thereby ensuring the accuracy of the test results.

[0020] 2. In the process of friction testing of the present invention, the protective film and the friction block will not rub repeatedly, which can prevent the protective film from generating heat due to repeated friction and affecting its physical properties, thereby ensuring the authenticity of the test results.

[0021] 3. During the test of the present invention, the positions tested by applying different forces can be marked by marking blocks, so that subsequent staff can observe the wear of the protective film under different friction conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structures of the friction mechanism, marking mechanism and placement mechanism of the present invention.

[0024] Figure 3 It is a schematic structural diagram of the side frame, connecting plate and air-permeable cylinder of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the placement mechanism of the present invention.

[0026] Figure 5 It is a structural schematic diagram of the marking mechanism of the present invention.

[0027] Figure 6 It is a schematic diagram of the first structure of the air suction mechanism and the driving mechanism of the present invention.

[0028] Figure 7 It is a front view of the suction mechanism and the driving mechanism of the present invention.

[0029] Figure 8 It is a second structural schematic diagram of the air suction mechanism and the driving mechanism of the present invention.

[0030] Fig. 9 It is a schematic structural diagram of the cleaning mechanism of the present invention.

[0031] Fig.10 It is a schematic structural diagram of the connecting rod, the retaining ring and the air-permeable cylinder of the present invention.

[0032] Fig.11 It is a structural schematic diagram of the smoothing mechanism of the present invention.

[0033] Fig.12 For the present invention Fig.11 Enlarged view of part A in .

[0034] The names and serial numbers of the parts in the figure are: 1_bottom plate, 2_side frame, 3_connecting plate, 4_connecting frame, 41_cylinder, 42_friction block, 43_pressure sensor, 44_guide rod, 5_air permeability tube, 61_mounting plate, 62_connecting plate, 63_electric push rod, 64_marking block, 71_connecting seat, 72_mounting shaft, 73_locking nut, 74_driving motor, 75_control panel, 81_sleeve, 82_suction pipe, 83_suction frame, 91_inner gear ring, 92_rotating shaft, 93_driving gear, 94_servo motor, 101_connecting block, 102_cleaning brush cylinder, 103_belt drive group, 111_connecting rod, 112_blocking ring, 121_arc plate, 122_smoothing roller, 123_elastic part, 100_protective film. DETAILED DESCRIPTION

[0035] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0036] A PVC profile protective film wear tester, such as Figure 1-Figure 5As shown, it includes a base plate 1, a side frame 2, a connecting plate 3, a breathable tube 5, a friction mechanism, a marking mechanism and a placement mechanism. The side frames 2 are connected to the front and rear sides of the top of the base plate 1, and the upper parts of the two side frames 2 are connected to the connecting plates 3. The breathable tube 5 is rotatably connected between the two connecting plates 3. The side frames 2 are provided with a friction mechanism for rubbing the protective film 100, and the friction mechanism is provided with a marking mechanism. The base plate 1 is provided with a placement mechanism for placing the roll of protective film 100.

[0037] like Figure 2 As shown, the friction mechanism includes a connecting frame 4, a cylinder 41, a guide rod 44, a friction block 42 and a pressure sensor 43. The connecting frame 4 is connected between the upper right parts of the two side frames 2, and the cylinder 41 is installed on the right side of the connecting frame 4. The telescopic rod of the cylinder 41 is connected to the pressure sensor 43, and the sensing end of the pressure sensor 43 is installed with a friction block 42, and the friction block 42 can resist the air tube 5. The front and rear sides of the connecting frame 4 are slidably connected with the guide rod 44, and the friction block 42 is connected to the guide rod 44, and the movement of the friction block 42 can be guided by the guide rod 44.

[0038] like Figure 5 As shown, the marking mechanism includes a mounting plate 61, a connecting plate 62, an electric push rod 63, a marking block 64 and a control panel 75. The mounting plate 61 is connected between the two guide rods 44. The lower part of the mounting plate 61 is slidably connected to the connecting plate 62. The marking block 64 is embedded on the left side of the connecting plate 62. The marking block 64 can move to contact the protective film 100 and make a mark on the protective film 100. The mounting plate 61 is installed with an electric push rod 63. The telescopic rod of the electric push rod 63 is connected to the connecting plate 62 so that the electric push rod 63 can drive the connecting plate 62 to move. The control panel 75 is installed on the front side frame 2. The electric push rod 63 and the pressure sensor 43 are both electrically connected to the control panel 75.

[0039] like Figure 2 and Figure 4 As shown, the placement mechanism includes a connecting seat 71, a mounting shaft 72, a locking nut 73 and a driving motor 74. Two connecting seats 71 are connected to the top rear side of the base plate 1. The two connecting seats 71 are rotatably connected to the mounting shaft 72. The front side of the mounting shaft 72 is threadedly connected to the locking nut 73. A driving motor 74 is installed on the right connecting seat 71, and the output shaft of the driving motor 74 is connected to the mounting shaft 72.

[0040] When it is necessary to perform a wear test on the protective film 100, this tester can be used. When in use, the reel with the protective film 100 is first sleeved on the left mounting shaft 72. After sleeved, the locking nut 73 is rotated to the left mounting shaft 72 to fix the reel. Then, another reel can be sleeved on the right mounting shaft 72 according to the above operation. After the operation is completed, the protective film 100 can be pulled out and wrapped around the breathable tube 5 on another reel. At this time, the telescopic rod of the cylinder 41 is controlled to extend to drive the pressure sensor 43 and the friction block 42 to move. After the friction block 42 moves, it can contact the protective film 100, thereby generating friction with the protective film 100, and the pressure sensor 43 can detect the pressure applied during friction. Then, the drive motor 74 can be controlled to drive the right mounting shaft 72 to rotate, thereby driving the reel on the right to rotate and roll up the protective film 100. During the rolling process, the protective film 100 rubs against the friction block 42, thereby testing the wear resistance of the protective film 100. As the test proceeds, the cylinder 41 can be controlled to continue to apply pressure. When the pressure sensor 43 detects a change in pressure, it will send a signal to the control panel 75. When the control panel 75 receives the signal, it will control the electric push rod 63 to retract once, thereby driving the connecting plate 62 and the marking block 64 to move back and forth left and right. When the marking block 64 moves, it can mark a mark on the protective film 100, which means that the friction force exerted on the protective film 100 changes from this mark. This process is repeated repeatedly, and the wear resistance of the protective film 100 can be tested using the present device. During the test, different friction forces are applied to different areas on the protective film 100 for wiping. The test results will not interfere with each other, and the test results obtained are more accurate.

[0041] like Figure 6-Figure 8 As shown, an air suction mechanism is also included, and the air suction mechanism includes a sleeve 81, an air suction pipe 82 and an air suction frame 83. The sleeve 81 is connected between the upper parts of the two side frames 2. A plurality of air suction pipes 82 are evenly spaced and connected to the right side of the sleeve 81. An air suction frame 83 is connected between the right sides of the plurality of air suction pipes 82. The air suction frame 83 is closely attached to the right inner wall of the air permeable cylinder 5.

[0042] like Figure 6-Figure 8 As shown, it also includes a driving mechanism, which includes an inner gear ring 91, a rotating shaft 92, a driving gear 93 and a servo motor 94. The inner gear ring 91 is rotatably connected to the front and rear sides of the air tube 5, and a rotating shaft 92 is rotatably connected between the middle parts of the two side frames 2. The rotating shaft 92 is located inside the air tube 5, and the front and rear sides of the rotating shaft 92 are connected to the driving gear 93. The driving gear 93 is meshed with the inner gear ring 91, so that the rotation of the driving gear 93 can drive the inner gear ring 91 to rotate, thereby driving the air tube 5 to rotate. A servo motor 94 is installed on the rear side frame 2, and the output shaft of the servo motor 94 is connected to the rotating shaft 92.

[0043] After the protective film 100 is placed, an external suction pump can be connected to the sleeve 81, and then the suction pump can be controlled to operate through the sleeve 81 and the suction pipe 82 to generate negative pressure in the suction frame 83. The negative pressure can pass through the air tube 5 and absorb the protective film 100. At the same time, the servo motor 94 can be controlled to drive the rotating shaft 92 to rotate. When the rotating shaft 92 rotates, it can drive the driving gear 93 to rotate. The rotation of the driving gear 93 drives the inner gear ring 91 to rotate, and the rotation of the inner gear ring 91 drives the air tube 5 to rotate. When the air tube 5 rotates, the protective film 100 is sucked through the suction pipe 82, which will drive the protective film 100 to move together. At this time, the protective film 100 is rolled up by the installation shaft 72, so that the protective film 100 can be transported. The air tube 5 is assisted in the transportation of the protective film 100 by rotating, which can avoid the friction between the protective film 100 and the air tube 5 and affect the friction test of the protective film 100, so as to ensure the accuracy of the friction test results.

[0044] like Fig. 9 As shown, a cleaning mechanism is also included, which includes a connecting block 101, a cleaning brush cylinder 102 and a belt drive group 103. The lower parts of the two side frames 2 are connected to the connecting blocks 101, and the cleaning brush cylinder 102 is rotatably connected between the two connecting blocks 101. The cleaning brush cylinder 102 is in contact with the outer surface of the air-permeable cylinder 5. A belt drive group 103 is installed between the cleaning brush cylinder 102 and the rotating shaft 92, so that the rotating shaft 92 can drive the cleaning brush cylinder 102 to rotate through the belt drive group 103 when rotating. The cleaning brush cylinder 102 can clean the outer surface of the air-permeable cylinder 5 when rotating, and brush off the film residue attached to the outer surface of the cleaning brush cylinder 102.

[0045] like Figure 10-12 As shown, it also includes a connecting rod 111 and a retaining ring 112. Two connecting rods 111 are connected between the lower parts of the two side frames 2. Retaining rings 112 are connected between the front and rear sides of the two connecting rods 111. The two retaining rings 112 are respectively sleeved on the front and rear sides of the air tube 5. When the protective film 100 passes around the air tube 5, the two retaining rings 112 can limit the protective film 100 to avoid the position of the protective film 100 from shifting.

[0046] like Fig.11 and Fig.12As shown, a smoothing mechanism is also included, and the smoothing mechanism includes an arc plate 121, a smoothing roller 122 and an elastic member 123. The arc plate 121 is rotatably connected between the tops of the two retaining rings 112, and the smoothing roller 122 is connected to the right side of the arc plate 121. During the movement of the protective film 100, the smoothing roller 122 can smooth the protective film 100 to prevent the smoothing roller 122 from tilting. An elastic member 123 is connected between the arc plate 121 and the retaining ring 112, and the elastic member 123 is a torsion spring. In the initial state, the elastic member 123 is in a compressed state. The elastic member 123 in the compressed state can apply pressure to the arc plate 121 and the smoothing roller 122, so that the smoothing roller 122 can press the protective film 100.

[0047] This embodiment also provides a method for using a PVC profile protective film wear tester, and the specific steps are as follows:

[0048] S1: Sleeve the reel with the protective film 100 on one of the mounting shafts 72, rotate the locking nut 73 to fix the reel, and then sleeve another reel on another mounting shaft 72 according to the above operation, pull out the protective film 100 and wrap it around the breathable cylinder 5 on another reel;

[0049] S2: Control the telescopic rod of the air cylinder 41 to extend to drive the pressure sensor 43 and the friction block 42 to move. The friction block 42 moves to contact the protective film 100 to generate friction. The pressure sensor 43 detects the pressure applied during the friction.

[0050] S3: Control the driving motor 74 to drive the mounting shaft 72 and the reel to rotate, and roll up the protective film 100. During the rolling process, the protective film 100 rubs against the friction block 42, and the wear resistance of the protective film 100 is tested;

[0051] S4: During the test, the control cylinder 41 continues to apply pressure, and the pressure sensor 43 detects the pressure change and sends a signal to the control panel 75. The control panel 75 receives the signal to control the electric push rod 63 to extend and retract once, driving the connecting plate 62 and the marking block 64 to move back and forth left and right. The marking block 64 marks a mark on the protective film 100 when moving. This is repeated to complete the wear resistance test of the protective film 100.

[0052] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A PVC profile protective film wear tester, characterized in that: The invention comprises a bottom plate (1), a side frame (2), a connecting plate (3), a ventilating cylinder (5), a friction mechanism, a marking mechanism and a placement mechanism. The top of the bottom plate (1) is connected to the side frames (2) on both sides, the upper parts of the two side frames (2) are connected to the connecting plates (3), the ventilating cylinder (5) is rotatably connected between the two connecting plates (3), the side frames (2) are provided with a friction mechanism for rubbing the protective film (100), the friction mechanism is provided with a marking mechanism, and the bottom plate (1) is provided with a placement mechanism for placing a roll of the protective film (100).

2. A PVC profile protective film wear tester according to claim 1, characterized in that: The friction mechanism comprises a connecting frame (4), a cylinder (41), a guide rod (44), a friction block (42) and a pressure sensor (43). The connecting frame (4) is connected between the two side frames (2). The connecting frame (4) is installed with a cylinder (41). The telescopic rod of the cylinder (41) is connected with a pressure sensor (43). The sensing end of the pressure sensor (43) is installed with a friction block (42). The friction block (42) can resist the air permeable tube (5). The two sides of the connecting frame (4) are slidably connected with the guide rods (44). The friction block (42) is connected to the guide rods (44).

3. A PVC profile protective film wear tester according to claim 2, characterized in that: The marking mechanism comprises a mounting plate (61), a connecting plate (62), an electric push rod (63), a marking block (64) and a control panel (75); the mounting plate (61) is connected between two guide rods (44); the lower part of the mounting plate (61) is slidably connected to the connecting plate (62); the marking block (64) is embeddedly mounted on the connecting plate (62); the mounting plate (61) is mounted with an electric push rod (63); the telescopic rod of the electric push rod (63) is connected to the connecting plate (62); a control panel (75) is mounted on one of the side frames (2); the electric push rod (63) and the pressure sensor (43) are both electrically connected to the control panel (75).

4. A PVC profile protective film wear tester according to claim 3, characterized in that: The placement mechanism comprises a connecting seat (71), a mounting shaft (72), a locking nut (73) and a driving motor (74); the top of the base plate (1) is connected to two connecting seats (71); the two connecting seats (71) are rotatably connected to the mounting shaft (72); the mounting shaft (72) is threadedly connected to the locking nut (73); a driving motor (74) is installed on one of the connecting seats (71); the output shaft of the driving motor (74) is connected to the mounting shaft (72).

5. A PVC profile protective film wear tester according to claim 4, characterized in that: The invention also comprises an air suction mechanism, which comprises a sleeve (81), an air suction pipe (82) and an air suction frame (83). The sleeve (81) is connected between the upper parts of the two side frames (2). A plurality of air suction pipes (82) are evenly spaced and connected to the sleeve (81). The plurality of air suction pipes (82) are connected to the air suction frame (83). The air suction frame (83) is closely attached to the inner wall of the air permeable cylinder (5).

6. A PVC profile protective film wear tester according to claim 5, characterized in that: The invention also comprises a driving mechanism, which comprises an inner gear ring (91), a rotating shaft (92), a driving gear (93) and a servo motor (94). The inner gear ring (91) is rotatably connected to both sides of the air vent tube (5). The rotating shaft (92) is rotatably connected between the middle parts of the two side frames (2). The rotating shaft (92) is located inside the air vent tube (5). The driving gear (93) is connected to both sides of the rotating shaft (92). The driving gear (93) is meshed with the inner gear ring (91). A servo motor (94) is installed on one of the side frames (2). The output shaft of the servo motor (94) is connected to the rotating shaft (92).

7. A PVC profile protective film wear tester according to claim 6, characterized in that: The cleaning device also includes a cleaning mechanism, which includes a connecting block (101), a cleaning brush cylinder (102) and a belt transmission group (103). The lower parts of the two side frames (2) are connected to the connecting blocks (101). The cleaning brush cylinder (102) is rotatably connected between the two connecting blocks (101). The cleaning brush cylinder (102) contacts the outer surface of the air-permeable cylinder (5). The belt transmission group (103) is installed between the cleaning brush cylinder (102) and the rotating shaft (92).

8. A PVC profile protective film wear tester according to claim 7, characterized in that: It also comprises a connecting rod (111) and a retaining ring (112), wherein the two connecting rods (111) are connected between the lower parts of the two side frames (2), retaining rings (112) are connected between the two sides of the two connecting rods (111), and the two retaining rings (112) are respectively sleeved on the two sides of the air permeable cylinder (5).

9. A PVC profile protective film wear tester according to claim 8, characterized in that: It also includes a smoothing mechanism, which includes a curved plate (121), a smoothing roller (122) and an elastic member (123); the curved plate (121) is rotatably connected between the tops of the two retaining rings (112); the smoothing roller (122) is connected to the curved plate (121); and the elastic member (123) is connected between the curved plate (121) and the retaining ring (112).

10. A method for using the PVC profile protective film wear tester based on the PVC profile protective film wear tester according to claim 4, characterized in that: The specific steps are as follows: S1: The reel with the protective film (100) wound around it is placed on one of the mounting shafts (72), and the locking nut (73) is rotated to fix the reel. According to the above operation, another reel is placed on another mounting shaft (72), and the protective film (100) is pulled out and wound around the breathable cylinder (5) and on another reel; S2: The telescopic rod of the control cylinder (41) is extended to drive the pressure sensor (43) and the friction block (42) to move, the friction block (42) moves and contacts with the protective film (100) to generate friction, and the pressure sensor (43) detects the pressure applied during the friction; S3: controlling the driving motor (74) to drive the installation shaft (72) and the reel to rotate, so as to roll up the protective film (100). During the rolling process, the protective film (100) and the friction block (42) rub against each other, so as to test the wear resistance of the protective film (100); S4: During the test, the control cylinder (41) continues to apply pressure, and the pressure sensor (43) detects the change in pressure and sends a signal to the control panel (75). The control panel (75) receives the signal and controls the electric push rod (63) to extend and retract once, driving the connecting plate (62) and the marking block (64) to move back and forth left and right. The marking block (64) marks a mark on the protective film (100) when moving. This is repeated to complete the wear resistance test of the protective film (100).

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