Compression resistance testing equipment for plastic plate processing

Abstract

The invention discloses compression resistance testing equipment for plastic plate processing, and relates to the technical field of material detection, the compression resistance testing equipment comprises a base and a plastic plate, the plastic plate is placed in the base, the plastic plate is clamped through a servo motor, a bidirectional screw rod and a clamping plate, it can be ensured that pressure is evenly distributed on the surface of the plastic plate, the bottom of a pressure plate is protected through a baffle, and the pressure plate is prevented from being damaged. According to the pressure-resistant test device for the plastic plate, when the pressure-resistant test is carried out on the brittle plastic plate, an operator is reminded that the device is in a non-working state at present, the operator is prevented from operating the device by mistake to cause safety accidents, the electric push rod, the pressure plate and the plastic plate are continuously contacted until the plastic plate is broken, and data transmission is carried out through the pressure sensor to carry out detection; and if the downward pressure is too large, the plastic plate can be crushed and fragments which are splashed quickly are generated, the baffle and the side baffle can move to the middle before pressure is applied to surround the area of the plastic plate to be detected, so that the fragments are effectively prevented from being splashed, and the safety of operators is protected.

Description

Technical Field

[0001] The invention relates to the technical field of material detection, in particular to a compression test device for plastic plate processing. Background Art

[0002] Plastic sheets are widely used in many fields such as construction, packaging, electronics, and automobiles. For example, in the construction industry, plastic sheets can be used for wall decoration, thermal insulation, etc. In the packaging field, plastic sheets can be made into various packaging boxes and pallets; in the electronics industry, plastic sheets can be used as substrates for circuit boards, etc. As the application scope of plastic sheets continues to expand, the requirements for their performance are also getting higher and higher, among which compressive resistance is an important indicator.

[0003] The patent with patent announcement number CN214277657U relates to the field of material testing technology. The patent discloses a compression testing machine for printed circuit boards, including a base, a support plate welded inside the base, support rods evenly welded on the top of the support plate, two vertical plates welded on the top of the base, top plates welded on the tops of the two vertical plates, a buzzer and a motor are fixedly connected to the top of the top plate by screws, and a first threaded rod is welded on the output shaft of the motor. The patent sets a push block at the bottom of the connecting plate, so that after the printed circuit board with unqualified compression resistance is deformed under the action of the pressure plate, the push block can be driven by the connecting plate to press the buzzer switch, so that the buzzer switch starts the buzzer; through the above settings, the compression testing machine has the function of automatically alarming unqualified printed circuit boards, thereby improving the working efficiency of the testing machine.

[0004] In the above patent, the compression tester is equipped with the function of automatically giving an alarm for unqualified printed circuit boards, thereby improving the working efficiency of the tester. However, the current equipment has the following problems: during the test, the plastic plate may break or splash due to being unable to withstand the pressure. Without the protection of a baffle, these fragments may directly hit the operator and cause physical injuries such as scratches and cuts. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a compression testing device for plastic plate processing, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a compressive testing device for plastic plate processing, comprising a base and a plastic plate, the plastic plate being arranged on the surface of the base, and also comprising a testing device; wherein the testing device comprises an electric push rod, a pressure plate, a baffle, a round rod, a servo motor, a bidirectional screw, a clamping plate and a side baffle, the fixed end of the electric push rod being fixedly mounted on the surface of the base, the pressure plate being fixedly mounted on the output end of the electric push rod, a pressure sensor being arranged inside the pressure plate, the baffle being rotatably mounted on the surface of the base, the round rod being fixedly mounted on the right side of the pressure plate, the fixed end of the servo motor being fixedly mounted on the surface of the base, the bidirectional screw being fixedly mounted on the output end of the servo motor, the clamping plate being threadedly mounted on the circumferential surface of the bidirectional screw, the side baffle being fixedly mounted on the right side of the clamping plate, the plastic plate being placed in the base, the bidirectional screw being driven to rotate by the output end of the servo motor, the rotation of the bidirectional screw causing the clamping plates on both sides to move toward the middle, and finally contacting the plastic plate and clamping it; Wherein, the surface of the base is provided with a pushing device for pushing out the plastic plate and a collecting device for collecting the residue generated after the feeding plate is crushed.

[0007] According to the above technical solution, the testing device also includes a connecting plate and a trigger rod, one side of the connecting plate is fixedly installed on the rear side of the pressure plate, the other side of the connecting plate is slidably installed on the inner wall of the base, and the trigger rod is fixedly installed on the bottom of the connecting plate. The pressure plate is driven down by the output end of the electric push rod. When the pressure plate descends, the round rod and the connecting plate are driven to move at the same time. The movement of the connecting plate drives the trigger rod to move.

[0008] According to the above technical solution, the pushing device includes a hollow cylinder, a sliding rail rod, a sliding sleeve, a pushing plate and a brake rod, the hollow cylinder is fixedly installed on the top of the base, the sliding rail rod is fixedly installed on the top of the base, the sliding sleeve is slidably installed on the circumferential surface of the sliding rail rod, the pushing plate is fixedly installed on the front side of the sliding sleeve, and the brake rod is fixedly installed on the rear side of the sliding sleeve. The movement of the sliding sleeve drives the pushing plate to move, and the movement of the pushing plate will contact the released plastic plate, so that the plastic plate is pushed out.

[0009] According to the above technical solution, the pushing device also includes a sliding button and a brake plate. The sliding button is slidably installed on the inner wall of the base, and the brake plate is rotatably installed on the circumferential surface of the sliding button. The movement of the sliding button drives the movement of the brake plate.

[0010] According to the above technical solution, a No. 1 spring is arranged between the sliding button and the base, and the sliding button is driven to reset by the No. 1 spring. A No. 1 torsion spring is arranged between the brake plate and the sliding button, and the brake plate is driven to reset by the No. 1 torsion spring. The top of the brake plate is arranged as an inclined surface, and the brake rod moves forward under the action of the inclined surface.

[0011] According to the above technical solution, the pushing device also includes a fixing button, a limiting rod and a long rod. The fixing button is fixedly installed on the circumferential surface of the sliding button, the limiting rod is fixedly installed on the inner wall of the sliding button, and the long rod is fixedly installed on the surface of the sliding sleeve. Under the restriction of the limiting rod, the brake plate cannot rotate.

[0012] According to the above technical solution, the collecting device includes an elastic telescopic plate, a guide plate, a sieve plate and a discharge plate. The fixed end of the elastic telescopic plate is fixedly installed on the inner wall of the base, the guide plate is fixedly installed on the bottom of the base, the sieve plate is slidably installed on the inner wall of the base, and a No. 2 spring is arranged between the sieve plate and the base. The sieve plate is reset by the arranged No. 2 spring. The discharge plate is fixedly installed on the surface of the base. After a certain pressure is applied, the plastic plate may break, and at this time, debris splashes out, and the debris will fall on the movable end of the elastic telescopic plate.

[0013] According to the above technical solution, the arc rod, the driving plate and the rubber block, the arc rod is fixedly installed on the movable end of the elastic telescopic plate, the driving plate is fixedly installed on the right side of the sieve plate, and the rubber block is fixedly installed on the surface of the base. When the arc rod moves, it will contact the driving plate, causing the driving plate to move downward. The movement of the driving plate drives the sieve plate to move. When the sieve plate moves downward, it will contact the rubber block and generate vibration.

[0014] The present invention provides a compressive testing device for plastic plate processing, which has the following beneficial effects: (1) The invention, through the setting of the test device, places the plastic plate in the base, and clamps the plastic plate through the servo motor, bidirectional screw and clamping plate, so as to ensure that the pressure is evenly distributed on the surface of the plastic plate. The bottom of the pressure plate is protected by the baffle plate to remind the operator that the equipment is currently in a non-working state, so as to avoid the operator from operating the equipment incorrectly, thereby causing a safety accident. The electric push rod and the pressure plate are in continuous contact with the plastic plate until the plastic plate breaks, and the data is transmitted through the pressure sensor for detection. When the brittle plastic plate is subjected to a pressure test, if the downward pressure is too large, the plastic plate may be crushed and produce rapidly splashing fragments. The baffle plate and the side baffle plate can be moved to the middle before the pressure is applied to surround the area of ​​the plastic plate to be tested, thereby effectively preventing the fragments from splashing and protecting the safety of the operator.

[0015] (2) This invention, through the setting of the pushing device, for some high-intensity compression tests, the plastic plate may break, splash, etc. after the test. The automatic pushing-out function can keep the operator away from the test area to avoid being injured by unexpected situations of the plastic plate. After the test, the plastic plate is pushed out by the trigger rod and the brake plate. The tested plastic plate can be quickly moved out of the test area so that the next sample can be tested immediately, which reduces the time of manual sample replacement and improves the overall test efficiency.

[0016] (3) The invention, through the setting of the collecting device, after applying a certain pressure, the plastic plate may break, and debris will splash out at this time, and the debris will fall on the movable end of the elastic telescopic plate. Through the sliding sleeve and the length, the debris on the surface of the elastic telescopic plate will fall to the guide plate when it loses support and then enter the screen plate, and be screened by the screen plate. The debris passing through the screen plate is output through the discharge plate. By screening and analyzing the debris, the damage and performance of the plastic plate during the compression test can be understood. The distribution of debris with different particle sizes can reflect the quality indicators of the plastic plate such as toughness, strength and brittleness, and help determine whether the plastic plate meets the quality standards and use requirements. When the screen plate moves downward, it will contact with the rubber block and generate vibration, which can cause the material to jump and roll on the screen surface, thereby increasing the contact opportunity between the material and the screen hole and improving the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the position structure of the servo motor and the bidirectional lead screw of the present invention; Figure 3 This is a schematic diagram of the position structure of the clamping plate and the slide rail rod of the present invention; Figure 4 This is a schematic diagram of the position structure of the baffle and the pressure plate of the present invention; Figure 5 It is a schematic diagram of the position structure of the elastic telescopic plate and the push plate of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure enlargement of part A; Figure 7 This is a schematic diagram of the position structure of the screen plate and the discharge plate of the present invention; Figure 8 It is a schematic diagram of the position structure of the rubber block and the long rod of the present invention.

[0018] In the figure: 1. base; 2. electric push rod; 3. pressure plate; 4. baffle; 5. round rod; 6. servo motor; 7. bidirectional screw rod; 8. clamping plate; 9. side baffle; 10. connecting plate; 11. trigger rod; 12. plastic plate; 20. hollow cylinder; 21. slide rail rod; 22. sliding sleeve; 23. push plate; 24. brake rod; 25. sliding button; 26. brake plate; 27. fixing button; 28. limit rod; 29. ​​long rod; 30. elastic telescopic plate; 31. guide plate; 32. sieve plate; 33. discharge plate; 34. arc rod; 35. drive plate; 36. rubber block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 4 An embodiment of the present invention is: a compressive test device for plastic plate processing, comprising a base 1 and a plastic plate 12, wherein the plastic plate 12 is arranged on the surface of the base 1, and also comprises a testing device; wherein the testing device comprises an electric push rod 2, a pressure plate 3, a baffle 4, a round rod 5, a servo motor 6, a bidirectional screw 7, a clamping plate 8 and a side baffle 9, wherein the fixed end of the electric push rod 2 is fixedly mounted on the surface of the base 1, the pressure plate 3 is fixedly mounted on the output end of the electric push rod 2, a pressure sensor is arranged inside the pressure plate 3, the baffle 4 is rotatably mounted on the surface of the base 1, the round rod 5 is fixedly mounted on the right side of the pressure plate 3, the fixed end of the servo motor 6 is fixedly mounted on the surface of the base 1, the bidirectional screw 7 is fixedly mounted on the output end of the servo motor 6, the clamping plate 8 is threadedly mounted on the circumferential surface of the bidirectional screw 7, and finally contacts and clamps the plastic plate 12, which can ensure that the pressure is evenly distributed on the surface of the plastic plate 12, avoid the situation where the local pressure is too large or too small, thereby more accurately evaluating the compressive resistance of the plastic plate 12, and the side baffle 9 is fixedly mounted on the right side of the clamping plate 8.

[0021] The testing device also includes a connecting plate 10 and a trigger rod 11. One side of the connecting plate 10 is fixedly installed on the rear side of the pressure plate 3, and the other side of the connecting plate 10 is slidably installed on the inner wall of the base 1. The trigger rod 11 is fixedly installed on the bottom of the connecting plate 10. When the pressure plate 3 descends, it drives the round rod 5 and the connecting plate 10 to move at the same time. The movement of the connecting plate 10 drives the trigger rod 11 to move.

[0022] When the present embodiment is working, the plastic plate 12 is placed in the base 1, and the bidirectional screw rod 7 is driven to rotate by the output end of the servo motor 6. The rotation of the bidirectional screw rod 7 causes the clamping plates 8 on both sides to move toward the middle, and finally contact and clamp the plastic plate 12, which can ensure that the pressure is evenly distributed on the surface of the plastic plate 12, avoiding the situation where the local pressure is too large or too small, so as to more accurately evaluate the pressure resistance of the plastic plate 12. The movement of the clamping plate 8 drives the side baffle plate 9 to move, and the bottom of the pressure plate 3 is protected by the baffle plate 4, reminding the operator that the equipment is currently in a non-working state, avoiding the operator from misoperating the equipment, thereby causing a safety accident. After the plastic plate 12 is fixed, the pressure plate 3 is driven down by the output end of the electric push rod 2. When the pressure plate 3 descends, the round rod 5 and the connecting plate 10 are moved at the same time. The movement of the connecting plate 10 drives the trigger rod 11 to move, and the pressure plate 3 is in continuous contact with the plastic plate 12 until the plastic plate 12 breaks, and data is transmitted through the pressure sensor. The round rod 5 moves to contact the baffle 4 so that the baffle 4 is out of the working range of the pressure plate 3. The baffle 4 will eventually move to the front side of the plastic plate 12 for protection. When the brittle plastic plate 12 is subjected to a pressure test, if the downward pressure is too large, the plastic plate 12 may be crushed and produce rapidly splashing fragments. The baffle 4 and the side baffle 9 can be moved to the middle before pressure is applied to surround the area of ​​the plastic plate 12 to be tested, thereby effectively preventing fragments from splashing and protecting the safety of the operator.

[0023] See also Figure 1-Figure 8 On the basis of the above-mentioned embodiment, in another embodiment of the present invention, a pushing device for pushing out the plastic plate 12 and a collecting device for collecting the residue generated after the feeding plate 12 is crushed are provided on the surface of the base 1, and the pushing device comprises a hollow cylinder 20, a slide rail rod 21, a sleeve 22, a pushing plate 23 and a brake rod 24, the hollow cylinder 20 is fixedly mounted on the top of the base 1, the slide rail rod 21 is fixedly mounted on the top of the base 1, the sleeve 22 is slidably mounted on the circumferential surface of the slide rail rod 21, the pushing plate 23 is fixedly mounted on the front side of the sleeve 22, and the brake rod 24 is fixedly mounted on the rear side of the sleeve 22. For some high-strength compression tests, the plastic plate 12 may break, splash, etc. after the test. The automatic pushing function can keep the operator away from the test area to avoid being injured due to unexpected situations of the plastic plate 12.

[0024] The pushing device also includes a sliding button 25 and a brake plate 26. The sliding button 25 is slidably installed on the inner wall of the base 1, and the brake plate 26 is rotatably installed on the circumferential surface of the sliding button 25. The tested plastic plate 12 can be quickly moved out of the test area so that the next sample can be tested immediately, which reduces the time for manual sample replacement and improves the overall test efficiency.

[0025] A No. 1 spring is arranged between the sliding button 25 and the base 1, and the sliding button 25 is reset by the No. 1 spring. A No. 1 torsion spring is arranged between the brake plate 26 and the sliding button 25, and the brake plate 26 is reset by the No. 1 torsion spring. The top of the brake plate 26 is arranged as an inclined surface.

[0026] The pushing device also includes a fixed button 27, a limiting rod 28 and a long rod 29. The fixed button 27 is fixedly installed on the circumferential surface of the sliding button 25, the limiting rod 28 is fixedly installed on the inner wall of the sliding button 25, and the long rod 29 is fixedly installed on the surface of the sliding sleeve 22. Under the restriction of the limiting rod 28, the brake plate 26 cannot rotate.

[0027] The collecting device includes an elastic telescopic plate 30, a guide plate 31, a sieve plate 32 and a discharge plate 33. The fixed end of the elastic telescopic plate 30 is fixedly installed on the inner wall of the base 1, the guide plate 31 is fixedly installed on the bottom of the base 1, the sieve plate 32 is slidably installed on the inner wall of the base 1, and a No. 2 spring is arranged between the sieve plate 32 and the base 1. The No. 2 spring is used to drive the sieve plate 32 to reset. The discharge plate 33 is fixedly installed on the surface of the base 1. By screening and analyzing the debris, the damage and performance of the plastic plate 12 during the compression test can be understood. The distribution of debris with different particle sizes can reflect the quality indicators of the plastic plate such as toughness, strength and brittleness, and help determine whether the plastic plate meets the quality standards and usage requirements.

[0028] The arc rod 34, the driving plate 35 and the rubber block 36, the arc rod 34 is fixedly mounted on the movable end of the elastic telescopic plate 30, the driving plate 35 is fixedly mounted on the right side of the screen plate 32, and the rubber block 36 is fixedly mounted on the surface of the base 1, which can make the material jump and roll on the screen surface, thereby increasing the contact opportunity between the material and the screen hole and improving the screening efficiency.

[0029] When the present embodiment is working, the trigger rod 11 moves downward and contacts the fixed button 27, so that the sliding button 25 moves downward, and the movement of the sliding button 25 drives the brake plate 26 to move, and the movement of the brake plate 26 contacts the brake rod 24, so that the brake plate 26 rotates backward and compresses the No. 1 torsion spring, and finally moves to the bottom of the brake rod 24. At this time, the feed plate 12 is in a compression-resistant state. When the test is completed, the sliding button 25 is reset by the No. 1 spring. At this time, the inclined surface of the brake plate 26 contacts the brake rod 24, and under the restriction of the limit rod 28, the brake plate 26 is The movable plate 26 cannot rotate. At this time, the brake rod 24 moves forward under the action of the inclined plane. The movement of the brake rod 24 drives the sliding sleeve 22 to move along the sliding rail rod 21. The movement of the sliding sleeve 22 drives the long rod 29 to move. The movement of the sliding sleeve 22 drives the push plate 23 to move. The push plate 23 moves and contacts the unclamped plastic plate 12, so that the plastic plate 12 is pushed out. The tested plastic plate 12 can be quickly moved out of the test area so that the next sample can be tested immediately, which reduces the time for manual sample replacement and improves the overall test efficiency. After a certain pressure is applied, the plastic plate 12 may break, and debris will splash out at this time. The debris will fall on the movable end of the elastic telescopic plate 30, and the movement of the sliding sleeve 22 drives the long rod 29 to move. The movement of the long rod 29 will contact the movable end of the elastic telescopic plate 30, causing it to be subjected to force and shrink. At this time, the debris on the surface will fall to the guide plate 31 and enter the screen plate 32 when it loses support. The screen plate 32 will screen it, and the debris passing through the screen plate 32 will be output through the discharge plate 33. By screening and analyzing the debris, it is possible to understand the fracture of the plastic plate 12 during the compression test. The distribution of debris with different particle sizes can reflect the quality indicators of the plastic board, such as toughness, strength and brittleness, and help determine whether the plastic board meets the quality standards and use requirements. When the movable end of the elastic telescopic plate 30 contracts, it drives the arc rod 34 to move. The arc rod 34 moves and contacts with the driving plate 35, so that the driving plate 35 moves downward. The movement of the driving plate 35 drives the screen plate 32 to move. The screen plate 32 moves downward and contacts with the rubber block 36 and generates vibration, which can make the material jump and roll on the screen surface, thereby increasing the contact opportunity between the material and the screen hole and improving the screening efficiency.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compression test device for plastic plate processing, comprising a base (1) and a plastic plate (12), characterized in that: The plastic plate (12) is arranged on the surface of the base (1), and also includes a testing device; The test device comprises an electric push rod (2), a pressure plate (3), a baffle (4), a round rod (5), a servo motor (6), a bidirectional screw rod (7), a clamping plate (8) and a side baffle (9); the fixed end of the electric push rod (2) is fixedly mounted on the surface of the base (1); the pressure plate (3) is fixedly mounted on the output end of the electric push rod (2); a pressure sensor is arranged inside the pressure plate (3); the baffle (4) is rotatably mounted on the surface of the base (1); the round rod (5) is fixedly mounted on the right side of the pressure plate (3); the fixed end of the servo motor (6) is fixedly mounted on the surface of the base (1); the bidirectional screw rod (7) is fixedly mounted on the output end of the servo motor (6); the clamping plate (8) is threadedly mounted on the circumferential surface of the bidirectional screw rod (7); and the side baffle (9) is fixedly mounted on the right side of the clamping plate (8); Wherein, a pushing device for pushing out the plastic plate (12) and a collecting device for collecting residues generated after the feeding plate (12) is crushed are provided on the surface of the base (1).

2. The compression test equipment for plastic plate processing according to claim 1, characterized in that: The testing device further comprises a connecting plate (10) and a trigger rod (11), one side of the connecting plate (10) being fixedly mounted on the rear side of the pressure plate (3), the other side of the connecting plate (10) being slidably mounted on the inner wall of the base (1), and the trigger rod (11) being fixedly mounted on the bottom of the connecting plate (10).

3. The compression test equipment for plastic plate processing according to claim 2, characterized in that: The pusher device comprises a hollow cylinder (20), a slide rail rod (21), a slide sleeve (22), a pusher plate (23) and a brake rod (24); the hollow cylinder (20) is fixedly mounted on the top of the base (1); the slide rail rod (21) is fixedly mounted on the top of the base (1); the slide sleeve (22) is slidably mounted on the circumferential surface of the slide rail rod (21); the pusher plate (23) is fixedly mounted on the front side of the slide sleeve (22); and the brake rod (24) is fixedly mounted on the rear side of the slide sleeve (22).

4. The compression test equipment for plastic plate processing according to claim 3, characterized in that: The material pushing device further comprises a sliding button (25) and a brake plate (26), wherein the sliding button (25) is slidably mounted on the inner wall of the base (1), and the brake plate (26) is rotatably mounted on the circumferential surface of the sliding button (25).

5. The compression test equipment for plastic plate processing according to claim 4, characterized in that: A No. 1 spring is arranged between the sliding button (25) and the base (1), a No. 1 torsion spring is arranged between the braking plate (26) and the sliding button (25), and the top of the braking plate (26) is arranged as an inclined surface.

6. The compression test equipment for plastic plate processing according to claim 5, characterized in that: The pusher device further comprises a fixing button (27), a limiting rod (28) and a long rod (29); the fixing button (27) is fixedly mounted on the circumferential surface of the sliding button (25); the limiting rod (28) is fixedly mounted on the inner wall of the sliding button (25); and the long rod (29) is fixedly mounted on the surface of the sliding sleeve (22).

7. The compression test equipment for plastic plate processing according to claim 6, characterized in that: The collecting device comprises an elastic telescopic plate (30), a guide plate (31), a sieve plate (32) and a discharge plate (33); the fixed end of the elastic telescopic plate (30) is fixedly mounted on the inner wall of the base (1); the guide plate (31) is fixedly mounted on the bottom of the base (1); the sieve plate (32) is slidably mounted on the inner wall of the base (1); a No. 2 spring is provided between the sieve plate (32) and the base (1); and the discharge plate (33) is fixedly mounted on the surface of the base (1).

8. The compression test equipment for plastic plate processing according to claim 7, characterized in that: The arc rod (34), the drive plate (35) and the rubber block (36), wherein the arc rod (34) is fixedly mounted on the movable end of the elastic telescopic plate (30), the drive plate (35) is fixedly mounted on the right side of the sieve plate (32), and the rubber block (36) is fixedly mounted on the surface of the base (1).

Images