Device and method for detecting heat resistance and pressure resistance of heat-resistant rubber sheet for automobile

Abstract

The invention relates to the technical field of detection equipment, in particular to a heat resistance and pressure resistance detection device for a heat-resistant rubber sheet for an automobile and a detection method thereof. Comprising a circulating oven, a base, an upper clamp and a lower clamp, the base is mounted in the circulating oven; the upper clamp and the lower clamp are symmetrically arranged up and down and are used for clamping a rubber sheet; a laser displacement sensor and a pressure sensor are arranged in the circulating oven; the laser displacement sensor measures the distance between the end faces, close to each other, of the upper clamp and the lower clamp. The pressure sensor measures the pressure applied to the upper clamp by the extrusion block; the rubber sheet is placed on the lower clamp, the upper clamp and the lower clamp clamp the rubber sheet, and the circulating drying oven continuously heats the rubber sheet, so that the rubber sheet is at a high temperature and is pressed, and the heat resistance and the pressure resistance of the rubber sheet are further detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, and particularly relates to a heat and pressure resistance detection device for heat-resistant rubber sheet for automobiles and a detection method thereof. BACKGROUND

[0002] The heat-resistant rubber sheet for automobiles is a key material for realizing sealing, shock absorption and protection functions under high-temperature environments, and its performance directly affects the reliability and safety of automobile systems. Current mainstream materials include fluororubber (FKM), silicone rubber (VMQ), hydrogenated nitrile rubber (HNBR) and acrylate rubber (ACM). The heat-resistant rubber sheet for automobiles is often subjected to heat air aging method for heat resistance performance detection. The rubber sheet sample is hung in a forced ventilation constant temperature aging oven under normal pressure and a specified temperature for a specified time. After the rubber sheet is taken out, it is adjusted in a standard laboratory environment, and then the change in physical properties of the heat-resistant rubber sheet for automobiles is tested. The pressure resistance performance test applies pressure to the rubber sheet and maintains it for a period of time, and then measures the change in thickness of the rubber sheet after the pressure is released. The existing test method separates heat aging and pressure resistance test, so it cannot truly simulate the actual working conditions of the rubber sheet for automobiles (such as engine sealing gasket, transmission oil seal, etc.) under the coupling action of high temperature and continuous compression force. This separate test can seriously underestimate the performance degradation of the material in the real environment (such as increased compression permanent deformation and sealing failure), thereby causing limitations.

[0003] Therefore, the present application provides a heat and pressure resistance detection device for heat-resistant rubber sheet for automobiles and a detection method thereof. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a heat and pressure resistance detection device for heat-resistant rubber sheet for automobiles and a detection method thereof, which overcomes the deficiencies of the prior art and aims to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a heat and pressure resistance detection device for heat-resistant rubber sheet for automobiles, comprising: A circulating oven, a base, an upper clamp and a lower clamp; the base is installed in the circulating oven; the upper clamp and the lower clamp are symmetrically arranged up and down and used for clamping rubber sheets; a support is arranged on the base; the upper clamp and the lower clamp are both installed on the support; a mounting disc is fixedly connected to the support; an extrusion screw is screw-connected to the mounting disc; a lower end of the extrusion screw is rotatably connected with an extrusion block; the extrusion block can exert pressure on the upper clamp; a laser displacement sensor and a pressure sensor are arranged in the circulating oven; the laser displacement sensor measures the distance between the end faces of the upper clamp and the lower clamp which are close to each other; the pressure sensor measures the pressure exerted by the extrusion block on the upper clamp.

[0006] Preferably, a mounting round block is fixedly connected to the support; an extrusion motor is mounted on the mounting round block; an output end of the extrusion motor is fixedly connected with a connecting sleeve; a connecting rod is fixedly connected to the extrusion screw; the connecting rod can be inserted into the connecting sleeve and is in sliding fit with the connecting sleeve.

[0007] By placing the rubber sheet on the lower clamp, the upper clamp and the lower clamp clamp the rubber sheet, and the circulating oven continuously heats, so that the rubber sheet is in a high temperature and pressure condition, and then the heat resistance and pressure resistance of the rubber sheet are detected.

[0008] Preferably, the support is rotatably connected to the base; a rotating motor is fixedly connected to the base; the rotating motor and the support are in transmission through a gear set; two disc blocks are fixedly connected to the support; the upper clamp is slidingly connected to the upper disc block; the lower clamp is fixedly connected to the lower disc block; the upper clamp and the lower clamp enclose a ring on the corresponding disc blocks.

[0009] Preferably, a support frame is fixedly connected to the base; a first rod and a second rod are slidingly connected to the support frame; a moving electric push rod is connected between the first rod, the second rod and the support frame; a first sliding block is symmetrically slidingly connected to the first rod; an adjusting electric push rod is connected between the first sliding block and the first rod; the laser displacement sensor is divided into a transmitting end and a receiving end; the transmitting end and the receiving end of the laser displacement sensor are fixedly connected to two first sliding blocks respectively; a contact rod is mounted on one side of the transmitting end and the receiving end of the laser displacement sensor; an electrode sheet is fixedly connected to the contact rod; the electrode sheet is also fixedly connected to the transmitting end and the receiving end of the laser displacement sensor; the electrode sheet on the contact rod is in contact with the electrode sheet on the transmitting end and the receiving end.

[0010] Preferably, the extrusion block is slidably connected with a connecting block; the connecting block is connected with the extrusion block through a connecting electric push rod; the second lever is slidably connected with a second sliding block; the second sliding block is connected with the second lever through a telescopic electric push rod; and the pressure sensor is fixedly connected to the second sliding block.

[0011] By surrounding the upper clamp and the lower clamp around the disc block, the number of clamped rubber sheets is increased, and by moving the emission end and the receiving end of the laser displacement sensor, the emission end and the receiving end of the laser displacement sensor are aligned with the upper clamp and the lower clamp, so that the laser displacement sensor detects the thickness of the rubber sheet, and after the second lever and the pressure sensor replace the connecting block, the pressure is detected, and after the detection is completed, the original position is returned, the disc block and the rubber sheet are rotated, and the next rubber sheet is detected, so that the laser displacement sensor and the pressure sensor of the present application can detect multiple rubber sheets, thereby saving costs.

[0012] Preferably, the number of the connecting blocks on the extrusion block is two; and the two connecting blocks are symmetrically arranged.

[0013] A heat-resistant and pressure-resistant detection method for a heat-resistant rubber sheet for automobiles, which is applicable to the heat-resistant and pressure-resistant detection device for the heat-resistant rubber sheet for automobiles, and has the following steps: S1, cutting a rubber sheet sample, i.e. placing the rubber sheet on the lower clamp, driving the upper clamp to move downward by the extrusion motor, clamping the rubber sheet, and starting the circulating air box to maintain high temperature and air exchange; S2, the laser displacement sensor is close to the lower clamp and the upper clamp to detect the thickness of the rubber sheet, and the pressure sensor is close to the connecting block to detect the force transmitted from the connecting block to the upper clamp and the extrusion block, and detect the pressure of the rubber sheet, and after the detection is completed, the disc block drives the rubber sheet to rotate to detect the next rubber sheet; S3, after the detection is completed, the rubber sheet is naturally cooled with the circulating air box, and then the rubber sheet is taken out and the hardness is detected by using a hardness tester.

[0014] The present application has the following advantages: 1. The present application places the rubber sheet on the lower clamp, clamps the rubber sheet by the upper clamp and the lower clamp, and continuously heats the rubber sheet by the circulating oven, so that the rubber sheet is in a high-temperature and pressure condition, and the heat-resistant and pressure-resistant performance of the rubber sheet is detected.

[0015] 2. The present application increases the number of clamped rubber sheets by surrounding the upper clamp and the lower clamp around the disc block, and then aligns the emission end and the receiving end of the laser displacement sensor with the positions of the upper clamp and the lower clamp by moving the emission end and the receiving end of the laser displacement sensor, so that the laser displacement sensor detects the thickness of the rubber sheet, and after the second rod and the pressure sensor replace the connecting block, the pressure is detected, and after the detection is completed, it returns to the original position, the disc block and the rubber sheet are rotated, and the next rubber sheet is detected, so that the laser displacement sensor and the pressure sensor of the present application can detect multiple rubber sheets, saving costs. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a heat-resistant rubber sheet heat-resistant and pressure-resistant detection device for a car. Figure 2 It is a structural schematic diagram of a heat-resistant rubber sheet heat-resistant and pressure-resistant detection device for a car. Figure 1 It is an enlarged view of position A in the middle. Figure 3 It is an enlarged view of position B in the middle. Figure 1 It is an enlarged view of position B in the middle. Figure 4 It is a partial sectional view of the extrusion block and the connecting block in the present application. Figure 5 It is a sectional view of the support frame, the first rod, the contact rod and the first sliding block in the present application. Figure 6 It is a sectional view of the support frame, the second rod and the second sliding block in the present application.

[0017] In the figure: 1, circulating oven; 11, base; 12, upper clamp; 13, lower clamp; 2, support; 21, mounting disc; 22, extrusion screw; 23, extrusion block; 24, laser displacement sensor; 25, pressure sensor; 26, mounting disc; 27, extrusion motor; 28, connecting sleeve; 29, connecting rod; 3, rotating motor; 31, disc block; 4, support frame; 41, first rod; 42, second rod; 43, moving electric push rod; 44, first sliding block; 45, contact rod; 46, electrode sheet; 5, connecting block; 51, connecting electric push rod; 52, second sliding block; 53, telescopic electric push rod; 54, adjusting electric push rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] Embodiment one: refer to the drawings in the description Figures 1 to 6The utility model relates to a kind of heat-resistant rubber sheet heat-resistant pressure detection device for automobile, comprising: Circulating oven 1, base 11, upper clamp 12 and lower clamp 13;Base 11 is installed in circulating oven 1;Upper clamp 12 and lower clamp 13 are symmetrically arranged, clamp rubber sheet;Base 11 is provided with support 2;Upper clamp 12 and lower clamp 13 are installed on support 2;Support 2 is fixedly connected with mounting disc 21;Extrusion screw 22 is screw-connected on mounting disc 21;The lower end of extrusion screw 22 is rotatably connected with extrusion block 23;Extrusion block 23 can exert pressure on upper clamp 12;Laser displacement sensor 24 and pressure sensor 25 are arranged in circulating oven 1;Laser displacement sensor 24 measures the distance between the end faces of upper clamp 12 and lower clamp 13 close to each other;Pressure sensor 25 measures the pressure exerted by extrusion block 23 on upper clamp 12.

[0020] In the utility model, support 2 is fixedly connected with mounting round block 26;Extrusion motor 27 is installed on mounting round block 26;The output end of extrusion motor 27 is fixedly connected with connecting sleeve 28;Extrusion screw 22 is fixedly connected with connecting rod 29;Connecting rod 29 can be inserted into connecting sleeve 28, and is in sliding fit with connecting sleeve 28.

[0021] In the utility model, heat-resistant rubber sheet for automobile is placed on lower clamp 13, then extrusion motor 27 drives connecting sleeve 28 to rotate, so that connecting rod 29 drives extrusion screw 22 to rotate, extrusion screw 22 rotates downward, thereby pushing extrusion block 23 and upper clamp 12 downward, so that upper clamp 12 and lower clamp 13 clamp heat-resistant rubber sheet for automobile together, simulating the scene when heat-resistant rubber sheet for automobile is installed on automobile;Then the door of circulating oven 1 is closed, and circulating oven 1 is started again, circulating oven 1 heats the internal space, so that internal components and heat-resistant rubber sheet for automobile are in high-temperature environment, so that heat-resistant rubber sheet for automobile is in high-temperature and pressure environment during detection, laser displacement sensor 24 detects the thickness of rubber sheet, pressure sensor 25 detects the pressure on rubber sheet, and the pressure on rubber sheet can be adjusted instantaneously, the thickness change of rubber sheet is detected, and the elasticity change of rubber sheet is detected. The utility model places rubber sheet on lower clamp 13, upper clamp 12 and lower clamp 13 clamp rubber sheet, and circulating oven 1 continuously heats, so that rubber sheet is in high-temperature and pressure condition, and then the heat-resistant and pressure-resistant performance of rubber sheet is detected.

[0022] Example two: on the basis of example one, refer to the description attached Figures 1 to 6In the present application, the support 2 is rotationally connected to the base 11; the base 11 is fixedly connected with a rotating motor 3; the rotating motor 3 and the support 2 are in transmission through a gear set; the support 2 is fixedly connected with two disc blocks 31; the upper clamp 12 is slidingly connected to the upper disc block 31; the lower clamp 13 is fixedly connected to the lower disc block 31; the upper clamp 12 and the lower clamp 13 enclose a ring shape on the corresponding disc block 31.

[0023] In the present application, the base 11 is fixedly connected with a support frame 4; the support frame 4 is slidingly connected with a first rod 41 and a second rod 42; the first rod 41 and the second rod 42 are both connected with a moving electric push rod 43 between the support frame 4; the first rod 41 is slidingly connected with a first sliding block 44 symmetrically; the first sliding block 44 is connected with an adjusting electric push rod 54 between the first rod 41; the laser displacement sensor 24 is divided into a transmitting end and a receiving end, and the transmitting end and the receiving end of the laser displacement sensor 24 are fixedly connected to two first sliding blocks 44; the transmitting end and the receiving end of the laser displacement sensor 24 are both installed with a contact rod 45; the contact rod 45 is fixedly connected with an electrode sheet 46; the transmitting end and the receiving end of the laser displacement sensor 24 are also fixedly connected with an electrode sheet 46; the electrode sheet 46 on the contact rod 45 is in contact with the electrode sheet 46 on the transmitting end and the receiving end.

[0024] In the present application, the extrusion block 23 is slidingly connected with a connecting block 5; the connecting block 5 and the extrusion block 23 are connected with a connecting electric push rod 51; the second rod 42 is slidingly connected with a second sliding block 52; the second sliding block 52 and the second rod 42 are connected with a telescopic electric push rod 53; the pressure sensor 25 is fixedly connected to the second sliding block 52.

[0025] In the present application, since multiple rubber sheets need to be detected at the same time when detecting the heat resistance and pressure resistance of the rubber sheets, sufficient sample data is formed, and the cost of the laser displacement sensor 24 and the pressure sensor 25 is relatively high, therefore, a set of laser displacement sensors 24 and pressure sensors 25 are used to detect the thickness and the pressure of all the rubber sheets; The protruding structure is arranged at one end of the upper clamp 12 and the lower clamp 13, the moving electric push rod 43 pushes out the first rod 41, so that the laser displacement sensor 24 moves towards the direction close to the upper clamp 12 and the lower clamp 13, then the adjusting electric push rod 54 pushes the first sliding block 44, so that the first sliding block 44 moves with the emitting end and the receiving end of the laser displacement sensor 24, when the emitting end and the receiving end move away from each other, the contact rod 45 contacts the protruding part of the upper clamp 12 and the lower clamp 13, so that the contact rod 45 is bent, the electrode sheet 46 on the contact rod 45 is separated from the electrode sheet 46 on the laser displacement sensor 24, the electrode sheet 46 is in communication with the controller circuit, so that the two electrode sheets 46 are disconnected, then the controller controls the emitting end and the receiving end of the laser displacement sensor 24 to stop moving, at this time, the distance detected by the laser displacement sensor 24 minus the distance from the protruding part of the upper clamp 12 and the lower clamp 13 to the end surface is the real-time thickness of the rubber sheet; The moving electric push rod 43 further pushes out the second rod 42, so that the pressure sensor 25 moves towards the direction close to the connecting block 5, until the front end of the second rod 42 moves to the lower end of the extrusion block 23, the connecting electric push rod 51 drives the connecting block 5 to retract into the extrusion block 23, at the same time, the telescopic electric push rod 53 pushes out the pressure sensor 25, the upper end of the second rod 42 contacts the extrusion block 23, the pressure sensor 25 contacts the upper clamp 12, so that the overall height of the second rod 42 and the pressure sensor 25 is the same as the length of the connecting block 5 exposed from the extrusion block 23, at this time, the second rod 42 and the pressure sensor 25 replace the original connecting block 5, and transmit the force of the extrusion block 23 to the upper die, so as to detect the pressure on the rubber sheet while extruding the rubber sheet; After detecting the thickness of one rubber sheet, the laser displacement sensor 24 is retracted, the pressure sensor 25 and the connecting block 5 return to the original position, then the rotating motor 3 drives the support frame 2, the disc block 31, the upper clamp 12 and the lower clamp 13 to rotate, so as to rotate the remaining rubber sheets to the position of the supporting frame 4, so that the laser displacement sensor 24 and the pressure sensor 25 detect the thickness and pressure of the next rubber sheet; The upper clamp 12 and the lower clamp 13 are arranged around the disc block 31, so that the number of clamping rubber sheets is increased, and then the emitting end and the receiving end of the laser displacement sensor 24 are moved, so that the emitting end and the receiving end of the laser displacement sensor 24 are aligned with the positions of the upper clamp 12 and the lower clamp 13, so as to detect the thickness of the rubber sheet by the laser displacement sensor 24, and then the second rod 42 and the pressure sensor 25 replace the connecting block 5 to detect the pressure, and then return to the original position, the disc block 31 and the rubber sheet are rotated to detect the next rubber sheet, so that the laser displacement sensor 24 and the pressure sensor 25 of the present application can detect multiple rubber sheets, and the cost is saved.

[0026] The number of the connecting blocks 5 on the extrusion block 23 is two; the two connecting blocks 5 are symmetrically arranged.

[0027] In the present application, two connecting blocks 5 are arranged on the extrusion block 23, so that after the second lever 42 and the pressure sensor 25 extend below the extrusion block 23, one of the connecting blocks 5 retracts the extrusion block 23, and the other connecting block 5 is still connected between the upper clamp 12 and the extrusion block 23, so that during the process of retracting the extrusion block 23 by the connecting block 5 and moving the pressure sensor 25 downward, the extrusion block 23 can still transmit force downward through the other connecting block 5, and the interruption of the extruded rubber sheet does not occur, thereby reducing the instability caused by the interruption of the extruded rubber sheet during the detection process.

[0028] Embodiment three: a method for using the device for detecting the heat resistance and pressure resistance of the heat-resistant rubber sheet for automobiles, which is suitable for the device for detecting the heat resistance and pressure resistance of the heat-resistant rubber sheet for automobiles, and the steps of the method are as follows: S1, cutting the rubber sheet sample, i.e. placing the rubber sheet on the lower clamp 13, driving the upper clamp 12 to move downward by the extrusion motor 27, clamping the rubber sheet, starting the circulating air bellow, keeping high temperature and circulating the air bellow; S2, the laser displacement sensor 24 is close to the lower clamp 13 and the upper clamp 12, detecting the thickness of the rubber sheet, the pressure sensor 25 is close to the connecting block 5, detecting the force transmitted from the extrusion block 23 to the upper clamp 12 through the connecting block 5, and detecting the pressure of the rubber sheet, and after the detection is completed, the disc block 31 drives the rubber sheet to rotate to detect the next rubber sheet; S3, after the detection is completed, the rubber sheet is naturally cooled with the circulating air bellow, and then the rubber sheet is taken out and the hardness is detected by using a hardness tester.

[0029] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application; the scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for testing the heat resistance and pressure resistance of heat-resistant rubber sheets for automobiles, characterized by: include: A circulation oven (1), a base (11), an upper clamp (12) and a lower clamp (13); the base (11) is installed in the circulation oven (1); the upper clamp (12) and the lower clamp (13) are symmetrically arranged up and down and are used to clamp the rubber sheet; a bracket (2) is provided on the base (11); the upper clamp (12) and the lower clamp (13) are both installed on the bracket (2); a mounting plate (21) is fixedly connected to the bracket (2); an extrusion screw is spirally connected to the mounting plate (21) (22); the lower end of the extrusion screw (22) is rotatably connected to an extrusion block (23); the extrusion block (23) can apply pressure to the upper clamp (12); a laser displacement sensor (24) and a pressure sensor (25) are provided in the circulation oven (1); the laser displacement sensor (24) measures the distance between the end faces of the upper clamp (12) and the lower clamp (13) that are close to each other; the pressure sensor (25) measures the pressure applied by the extrusion block (23) to the upper clamp (12).

2. The device for detecting heat resistance and pressure resistance of heat-resistant rubber sheets for automobiles according to claim 1, characterized in that: A mounting block (26) is fixedly connected to the bracket (2); an extrusion motor (27) is mounted on the mounting block (26); a connecting sleeve (28) is fixedly connected to the output end of the extrusion motor (27); a connecting rod (29) is fixedly connected to the extrusion screw (22); the connecting rod (29) can be inserted into the connecting sleeve (28) and is slidably engaged with the connecting sleeve (28).

3. The device for detecting heat resistance and pressure resistance of heat-resistant rubber sheets for automobiles according to claim 2, characterized in that: The bracket (2) is rotatably connected to the base (11); a rotating motor (3) is fixedly connected to the base (11); transmission is performed between the rotating motor (3) and the bracket (2) via a gear set; two disc blocks (31) are fixedly connected to the bracket (2); the upper clamp (12) is slidably connected to the upper disc block (31); the lower clamp (13) is fixedly connected to the lower disc block (31); the upper clamp (12) and the lower clamp (13) form a ring on the corresponding disc block (31).

4. The device for detecting heat resistance and pressure resistance of heat-resistant rubber sheets for automobiles according to claim 3, characterized in that: The base (11) is fixedly connected to a support frame (4); a No. 1 rod (41) and a No. 2 rod (42) are slidably connected to the support frame (4); a movable electric push rod (43) is connected between the No. 1 rod (41) and the No. 2 rod (42) and the support frame (4); a No. 1 sliding block (44) is symmetrically slidably connected to the No. 1 rod (41); an adjusting electric push rod (54) is connected between the No. 1 sliding block (44) and the No. 1 rod (41); the laser displacement sensor (24) is divided into a transmitting end and a receiving end. The transmitting end and the receiving end of the laser displacement sensor (24) are respectively fixedly connected to the two first sliding blocks (44); a contact rod (45) is installed on one side of the transmitting end and the receiving end of the laser displacement sensor (24); an electrode sheet (46) is fixedly connected to the contact rod (45); the transmitting end and the receiving end of the laser displacement sensor (24) are also fixedly connected to the electrode sheet (46); the electrode sheet (46) on the contact rod (45) contacts the electrode sheet (46) on the transmitting end and the receiving end.

5. The device for detecting heat resistance and pressure resistance of heat-resistant rubber sheets for automobiles according to claim 4, characterized in that: The extrusion block (23) is slidably connected to a connection block (5); a connection electric push rod (51) is connected between the connection block (5) and the extrusion block (23); a No. 2 sliding block (52) is slidably connected to the No. 2 rod (42); a telescopic electric push rod (53) is connected between the No. 2 sliding block (52) and the No. 2 rod (42); and the pressure sensor (25) is fixedly connected to the No. 2 sliding block (52).

6. The device for detecting heat resistance and pressure resistance of heat-resistant rubber sheets for automobiles according to claim 5, characterized in that: The number of the connecting blocks (5) on the extrusion block (23) is two; the two connecting blocks (5) are symmetrically arranged.

7. A method for testing the heat resistance and pressure resistance of a heat-resistant rubber sheet for automobiles, the method being applicable to the device for testing the heat resistance and pressure resistance of a heat-resistant rubber sheet for automobiles according to any one of claims 1 to 6, characterized in that: The steps of this method are as follows: S1, cutting a rubber sheet sample, that is, placing the rubber sheet on the lower clamp (13), the extrusion motor (27) drives the upper clamp (12) to move downward to clamp the rubber sheet, and the circulating bellows is started to maintain high temperature and the circulating bellows are ventilated; S2, the laser displacement sensor (24) is close to the lower clamp (13) and the upper clamp (12) to detect the thickness of the rubber sheet, and the pressure sensor (25) is close to the connecting block (5) to detect the force of the connecting block (5) transmitting the extrusion block (23) to the upper clamp (12) to detect the pressure on the rubber sheet. After the detection is completed, the disc block (31) drives the rubber sheet to rotate and detect the next rubber sheet; S3. After the test is completed, the rubber sheet is cooled naturally with the circulating air box, and then the rubber sheet is taken out and hardness test is performed using a hardness tester.

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