Tensile property testing machine for rubber product

Abstract

The utility model discloses a rubber product tensile property testing machine, which belongs to the technical field of rubber product production, and comprises a base, a testing box body is fixedly arranged on the upper surface of the base, two testing box doors are movably arranged on the side surface of the testing box body, two rotating shafts are rotatably arranged in the base, and the two rotating shafts are connected with the testing box door. A bidirectional lead screw is fixedly mounted between the two rotating shafts; an upper pointer and a lower pointer are arranged to be matched with a graduated scale and a clamp for use, the clamp is used for clamping and fixing a product, a stretching test is achieved through shrinkage of a piston rod of an air cylinder, and the position of the upper pointer is the standard numerical distance of the stretching performance of the product; when the mounting plate touches the contact switch in the stretching process, the stretching distance reaches the qualified stretching performance data distance, if the product is broken, the product is unqualified, otherwise, the product is qualified, meanwhile, the upper pointer can slide up and down to adjust the position, adaptive adjustment can be performed according to different stretching performance standard values of different products, and the universality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rubber product production, and particularly relates to a tensile property testing machine for rubber products. Background Technique

[0002] Rubber products refer to activities of producing various rubber products with natural and synthetic rubbers as raw materials, and also include rubber products reproduced from waste rubber. The output of synthetic rubber has far exceeded that of natural rubber, and the largest output is styrene-butadiene rubber. The production and processing of rubber products include many equipment processes. After production, in order to ensure the use effect of the products leaving the factory, it is necessary to test the tensile properties of the products. The purpose of the test is to ensure that the actual tensile properties of the products can meet the standard service performance.

[0003] When testing the tensile properties of rubber products, a testing machine is needed. However, the existing testing machines only have the tensile testing function during testing, and only stretch the test products until they are broken. For the tensile properties of the products, how to obtain whether the products are qualified without breaking the products is a problem to be solved. At the same time, there is a lack of an effective protection mechanism during use. If it breaks suddenly, it is easy to splash everywhere, posing a certain safety risk. Content of the Utility Model

[0004] The purpose of the utility model is to provide a tensile property testing machine for rubber products, so as to solve the problems raised in the above background technique that the existing testing machines only have the tensile testing function during testing, and only stretch the test products until they are broken. For the tensile properties of the products, how to obtain whether the products are qualified without breaking the products is a problem to be solved. At the same time, there is a lack of an effective protection mechanism during use. If it breaks suddenly, it is easy to splash everywhere, posing a certain safety risk.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A rubber product tensile property testing machine, including a base, on the upper surface of the base is fixedly installed a testing box body, on the side of the testing box body are movably provided two testing box doors, in the base are rotatably installed two rotating shafts, between the two rotating shafts is fixedly installed a bidirectional lead screw, on the side of the base is fixedly installed a motor, the output shaft of the motor is fixedly connected to the rotating shaft at the corresponding position, on the threaded outer surfaces of both sections of the bidirectional lead screw are threadedly installed threaded plates, on the upper surface of the threaded plate is fixedly installed a connecting plate, the connecting plate is fixed to the side of the testing box door at the corresponding position, on the testing box door is installed a glass observation window, on the upper surface of the testing box body is fixedly installed a cylinder, at the end of the piston rod of the cylinder is fixedly installed a mounting plate, in the testing box body are provided several clamps, the clamp includes a fixing plate, the fixing plate at the lower position is fixed to the lower surface of the inner wall of the testing box body, the fixing plate at the upper position is fixed to the lower surface of the mounting plate, the fixing plate at the upper position and the fixing plate at the lower position are arranged oppositely, on the surface of the fixing plate is fixedly installed a fixed clamping plate, on the side of the fixed clamping plate is fixedly installed a fixing screw, outside the fixing screw is sleeved a movable clamping plate, on the outer surface of the fixing screw is threadedly installed a nut, on the inner wall of the testing box body is fixedly installed a scale, at the end of the mounting plate is fixedly installed a lower indicating needle, in the testing box body is movably provided an upper indicating needle, and both the upper indicating needle and the lower indicating needle are used in cooperation with the scale.

[0006] With the above scheme, by setting the upper indicating needle, the lower indicating needle in cooperation with the scale and the clamp, the product is clamped and fixed by the clamp, and the tensile test is realized by the contraction of the piston rod of the cylinder. The position where the upper indicating needle is located is the standard numerical distance of the tensile property of the product. When the mounting plate touches the contact switch during the stretching process, it indicates that the stretching distance has reached the qualified tensile property data distance. At this time, if the product breaks, it is unqualified, otherwise it is qualified. At the same time, the upper indicating needle can slide up and down to adjust the position, and can be adaptively adjusted according to the different standard numerical values of the tensile properties of different products, improving the universality. By setting the testing box door in cooperation with the bidirectional lead screw, the testing box door is closed during the testing process, and observed through the glass observation window. After the testing is completed, the testing box door is opened, so that the testing process can be isolated and protected, avoiding the problem of product splashing caused by accidental breakage, and improving the safety guarantee.

[0007] In the above scheme, it should be noted that the motor, the cylinder and the contact switch are all electrically connected to an external power supply.

[0008] As a preferred implementation manner, on the upper and lower sides of the side of the testing box door are fixedly installed sliding strips, and on the upper and lower sides of the side of the testing box body are opened sliding grooves for the sliding strips to slide.

[0009] With the above - mentioned solution, by using the sliding bar in cooperation with the sliding groove, the test chamber door can be limited and supported, avoiding the phenomenon that the test chamber door detaches from the test chamber body.

[0010] As a preferred embodiment, a guide rod is fixedly installed inside the base, and the threaded plate is slidably installed on the outer surface of the guide rod.

[0011] With the above - mentioned solution, by using the guide rod in cooperation, the movement of the threaded plate can be supported, making the horizontal movement of the threaded plate smoother.

[0012] As a preferred embodiment, a limiting rod is fixed to the side of the fixed clamping plate. The limiting rod slidably penetrates through the movable clamping plate, and a limiting disk is fixed to the end of the limiting rod. A first spring is fixedly installed between the limiting disk and the movable clamping plate.

[0013] With the above - mentioned solution, by using the limiting rod in cooperation with the first spring and the limiting disk, the limiting rod can ensure the stable movement of the movable clamping plate and prevent it from shaking. The limiting disk can prevent the movable clamping plate from sliding off the limiting rod. When the nut is screwed onto the fixing screw to drive the movable clamping plate to approach the fixed clamping plate for clamping, the first spring deforms. Therefore, when the nut is unscrewed, the elastic force of the first spring can be used to drive the movable clamping plate to quickly reset, improving the unlocking convenience.

[0014] As a preferred embodiment, a connecting frame is fixedly installed on the side of the upper indicating needle. The other end of the connecting frame is fixedly installed with a trapezoidal sliding plate. A trapezoidal sliding groove for the trapezoidal sliding plate to slide is provided on the inner wall of the test chamber. A contact switch is fixedly installed on the lower surface of the connecting frame, and the contact switch is electrically connected to the air cylinder.

[0015] With the above - mentioned solution, by using the trapezoidal sliding plate in cooperation with the connecting frame, the upper indicating needle can be prevented from falling off. When the mounting plate moves upward and touches the contact switch, it indicates that the stretching distance has reached the qualified stretching performance data distance. At this time, if the product breaks, it is unqualified; if it does not break, it is qualified.

[0016] As a preferred embodiment, a locking rod is slidably installed on the trapezoidal sliding plate. One end of the locking rod is fixedly installed with an operating disk. A second spring is fixedly installed between the operating disk and the trapezoidal sliding plate. A plurality of locking grooves for cooperating with the locking rod are provided on the inner wall of the trapezoidal sliding groove.

[0017] With the above - mentioned solution, by using the locking rod in cooperation with the locking groove and the second spring, the position of the trapezoidal sliding plate can be locked, further ensuring the position stability of the upper indicating needle.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] The tensile property testing machine for rubber products is used by setting an upper indicating needle, a lower indicating needle, a scale and fixtures. The fixtures are used to clamp and fix the product, and the tensile test is realized by the contraction of the piston rod of the air cylinder. The position where the upper indicating needle is located is the standard numerical distance of the tensile property of the product. When the mounting plate touches the contact switch during the tensile process, it indicates that the tensile distance has reached the qualified tensile property data distance. If the product breaks at this time, it is unqualified; otherwise, it is qualified. At the same time, the upper indicating needle can slide up and down to adjust the position, and can be adaptively adjusted according to the different standard numerical values of the tensile properties of different products, improving the universality;

[0020] The tensile property testing machine for rubber products is used by setting a test chamber door in cooperation with a bidirectional lead screw. During the test, the test chamber door is closed and observed through the glass observation window. After the test is completed, the test chamber door is opened, so as to isolate and protect the test process, avoid the problem of product splashing caused by accidental breakage, and improve the safety guarantee. Brief Description of the Drawings

[0021] Figure 1 is a structural schematic diagram of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the base and the test chamber door of the present utility model;

[0023] Figure 3 is a structural schematic diagram of the base of the present utility model;

[0024] Figure 4 is a structural schematic diagram of the test box body of the present utility model;

[0025] Figure 5 is a structural schematic diagram of the fixture of the present utility model;

[0026] Figure 6 is a structural schematic diagram of the upper indicating needle of the present utility model.

[0027] In the figure: 1. Base; 2. Test box body; 3. Test chamber door; 4. Rotating shaft; 5. Bidirectional lead screw; 6. Motor; 7. Threaded plate; 8. Connecting plate; 9. Glass observation window; 10. Air cylinder; 11. Mounting plate; 12. Fixture; 13. Fixed plate; 14. Fixed clamping plate; 15. Movable clamping plate; 16. Fixed screw; 17. Nut; 18. Scale; 19. Lower indicating needle; 20. Upper indicating needle; 21. Slide bar; 22. Guide rod; 23. Limit rod; 24. Limit disk; 25. Spring 1; 26. Connecting frame; 27. Trapezoidal slide plate; 28. Contact switch; 29. Lock rod; 30. Operation disk; 31. Spring 2. Detailed Description of the Embodiment

[0028] Please refer to Figure 1-6, the utility model provides a testing machine for the tensile performance of rubber products, which includes a base 1. The upper surface of the base 1 is fixedly installed with a testing box body 2. Two testing box doors 3 are movably arranged on the side surface of the testing box body 2. Two rotating shafts 4 are rotatably installed in the base 1. A bidirectional lead screw 5 is fixedly installed between the two rotating shafts 4. A motor 6 is fixedly installed on the side surface of the base 1. The output shaft of the motor 6 is fixedly connected to the corresponding rotating shaft 4. Threaded plates 7 are threadedly installed on the outer surfaces of the two threaded sections of the bidirectional lead screw 5. The upper surface of the threaded plate 7 is fixedly installed with a connecting plate 8. The connecting plate 8 is fixed to the side surface of the testing box door 3 at the corresponding position. A glass observation window 9 is installed on the testing box door 3. A cylinder 10 is fixedly installed on the upper surface of the testing box body 2. The end of the piston rod of the cylinder 10 is fixedly installed with a mounting plate 11. A number of clamps 12 are arranged in the testing box body 2. The clamp 12 includes a fixing plate 13. The fixing plate 13 at the lower position is fixed to the lower surface of the inner wall of the testing box body 2. The fixing plate 13 at the upper position is fixed to the lower surface of the mounting plate 11. The fixing plate 13 at the upper position and the fixing plate 13 at the lower position are arranged oppositely. A fixed clamping plate 14 is fixedly installed on the surface of the fixing plate 13. A fixing screw 16 is fixedly installed on the side surface of the fixed clamping plate 14. A movable clamping plate 15 is sleeved on the outer part of the fixing screw 16. A nut 17 is threadedly installed on the outer surface of the fixing screw 16. A scale 18 is fixedly installed on the inner wall of the testing box body 2. A lower indicating needle 19 is fixedly installed at the end of the mounting plate 11. An upper indicating needle 20 is movably arranged in the testing box body 2. Both the upper indicating needle 20 and the lower indicating needle 19 are used in cooperation with the scale 18.

[0029] Sliding bars 21 are fixedly installed on both the upper and lower sides of the side surface of the testing box door 3. Sliding grooves for the sliding bars 21 to slide are opened on both the upper and lower sides of the side surface of the testing box body 2. By using the sliding bars 21 in cooperation with the sliding grooves, the testing box door 3 can be limited and supported to avoid the phenomenon that the testing box door 3 detaches from the testing box body 2.

[0030] A guide rod 22 is fixedly installed inside the base 1. The threaded plate 7 is slidably installed on the outer surface of the guide rod 22. By using the guide rod 22 in cooperation, the movement of the threaded plate 7 can be supported, making the horizontal movement of the threaded plate 7 smoother.

[0031] A limiting rod 23 is fixedly installed on the side of the fixed splint 14. The limiting rod 23 slidably penetrates through the movable splint 15, and a limiting disk 24 is fixedly installed at the end of the limiting rod 23. A first spring 25 is fixedly installed between the limiting disk 24 and the movable splint 15. By using the limiting rod 23 in cooperation with the first spring 25 and the limiting disk 24, the limiting rod 23 can ensure the stable movement of the movable splint 15 and prevent shaking. The limiting disk 24 can prevent the movable splint 15 from sliding off the limiting rod 23. When the nut 17 is screwed onto the fixing screw 16 to drive the movable splint 15 to approach the fixed splint 14 for clamping, the first spring 25 deforms. Therefore, when the nut 17 is unscrewed, the elastic force of the first spring 25 can be used to drive the movable splint 15 to quickly reset, improving the unlocking convenience.

[0032] A connecting frame 26 is fixedly installed on the side of the upper indicating needle 20. The other end of the connecting frame 26 is fixedly installed with a trapezoidal sliding plate 27. A trapezoidal sliding groove for the trapezoidal sliding plate 27 to slide is provided on the inner wall of the test box body 2. A contact switch 28 is fixedly installed on the lower surface of the connecting frame 26. The contact switch 28 is electrically connected to the air cylinder 10. By using the trapezoidal sliding plate 27 in cooperation with the connecting frame 26, the upper indicating needle 20 can be prevented from falling off. When the mounting plate 11 moves upward to contact the contact switch 28, it indicates that the stretching distance has reached the qualified stretching performance data distance. At this time, if the product breaks, it is unqualified; if it does not break, it is qualified.

[0033] A locking rod 29 is slidably installed on the trapezoidal sliding plate 27. One end of the locking rod 29 is fixedly installed with an operation disk 30. A second spring 31 is fixedly installed between the operation disk 30 and the trapezoidal sliding plate 27. A number of locking grooves for cooperating with the locking rod 29 are provided on the inner wall of the trapezoidal sliding groove. By using the locking rod 29 in cooperation with the locking grooves and the second spring 31, the position of the trapezoidal sliding plate 27 can be locked, further ensuring the position stability of the upper indicating needle 20.

[0034] During use, first start the motor 6 to drive the rotating shaft 4 to drive the bidirectional lead screw 5 to rotate, thereby driving the threaded plate 7 to drive the connecting plate 8 to move. The connecting plate 8 drives the test chamber door 3 to move, causing the test chamber door 3 to slide and unfold. Then, turn off the motor 6. Then, adjust the vertical position of the upper indicating needle 20 according to the standard tensile performance value distance of the product. During adjustment, pull the operation disc 30 to drive the locking rod 29 to move. The locking rod 29 disengages from the locking groove and the second spring 31 deforms, thereby unlocking the trapezoidal slide plate 27. Then, hold the upper indicating needle 20 and slide it up and down to adjust the position. After adjustment, release the operation disc 30, and use the second spring 31 to drive the locking rod 29 to reset and insert into the locking groove for locking. Then, place the two ends of the product on the clamps 12 at the corresponding positions and between the fixed clamping plate 14 and the movable clamping plate 15. Screw on the nut 17 to drive the movable clamping plate 15 to move towards the fixed clamping plate 14 to clamp the product. After clamping, start the motor 6 again to drive the test chamber door to slide and close. Then, start the cylinder 10 to drive the mounting plate 11 to move through the upper clamp 12 to perform the tensile performance test. During the test, the lower indicating needle 19 will move synchronously. When the mounting plate 11 touches the contact switch 28, it indicates that the tensile distance has reached the qualified tensile performance data distance. At this time, if the product breaks, it is unqualified; if it does not break, it is qualified.

Claims

1. A rubber product tensile properties testing machine, characterized by: The invention comprises a base (1), wherein a test box (2) is fixedly mounted on the upper surface of the base (1), two test box doors (3) are movably arranged on the side of the test box (2), two rotating shafts (4) are rotatably mounted in the base (1), a bidirectional lead screw (5) is fixedly mounted between the two rotating shafts (4), a motor (6) is fixedly mounted on the side of the base (1), the output shaft of the motor (6) is fixedly connected to the rotating shaft (4) at a corresponding position, threaded plates (7) are threadedly mounted on the two threaded outer surfaces of the bidirectional lead screw (5), a connecting plate (8) is fixedly mounted on the upper surface of the threaded plate (7), the connecting plate (8) is fixedly mounted on the side of the test box door (3) at a corresponding position, a glass observation window (9) is mounted on the test box door (3), a cylinder (10) is fixedly mounted on the upper surface of the test box (2), a mounting plate (11) is fixedly mounted on the end of the piston rod of the cylinder (10), and a plurality of clamps (12) are arranged in the test box (2). ), the fixture (12) comprises a fixing plate (13), wherein the fixing plate (13) at the lower position is fixed to the lower surface of the inner wall of the test box (2), wherein the fixing plate (13) at the upper position is fixed to the lower surface of the mounting plate (11), the fixing plate (13) at the upper position and the fixing plate (13) at the lower position are arranged relative to each other, a fixing clamp (14) is fixedly mounted on the surface of the fixing plate (13), and a fixing clamp (14) is fixedly mounted on the side of the fixing clamp (14). The fixing screw (16) is provided with a movable clamping plate (15) on the outside, and a nut (17) is threadedly installed on the outer surface of the fixing screw (16). A scale (18) is fixedly installed on the inner wall of the test box (2), a lower indicator needle (19) is fixedly installed on the end of the mounting plate (11), and an upper indicator needle (20) is movably arranged in the test box (2), and both the upper indicator needle (20) and the lower indicator needle (19) are used in conjunction with the scale (18).

2. The rubber product tensile properties testing machine according to claim 1, characterized in that: Slide bars (21) are fixedly mounted on both upper and lower sides of the side of the test box door (3), and slide grooves for the slide bars (21) to slide are provided on both upper and lower sides of the side of the test box body (2).

3. The rubber product tensile properties testing machine according to claim 1, characterized in that: A guide rod (22) is fixedly mounted inside the base (1), and the threaded plate (7) is slidably mounted on the outer surface of the guide rod (22).

4. The rubber product tensile properties testing machine according to claim 1, characterized in that: A limiting rod (23) is fixed on the side of the fixed clamping plate (14), the limiting rod (23) slides through the movable clamping plate (15) and a limiting plate (24) is fixed on the end of the limiting rod (23), and a spring (25) is fixedly installed between the limiting plate (24) and the movable clamping plate (15).

5. The rubber product tensile properties testing machine according to claim 1, characterized in that: A connecting frame (26) is fixedly mounted on the side of the upper indicating needle (20), a trapezoidal slide (27) is fixedly mounted on the other end of the connecting frame (26), a trapezoidal slide groove for the trapezoidal slide (27) to slide is provided on the inner wall of the test box (2), a contact switch (28) is fixedly mounted on the lower surface of the connecting frame (26), and the contact switch (28) is electrically connected to the cylinder (10).

6. The rubber product tensile properties testing machine according to claim 5, characterized in that: A locking rod (29) is slidably mounted on the trapezoidal slide plate (27), an operating panel (30) is fixedly mounted on one end of the locking rod (29), a second spring (31) is fixedly mounted between the operating panel (30) and the trapezoidal slide plate (27), and a plurality of locking grooves for use with the locking rod (29) are formed on the inner wall of the trapezoidal slide groove.

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