Physical property detection device for PVC (Polyvinyl Chloride) composite board

Abstract

The invention relates to the technical field of PVC composite board detection, in particular to a PVC composite board physical property detection device which comprises a base, a vertical sliding rail and a supporting arm located in front of the vertical sliding rail and fixedly connected with the vertical sliding rail are fixedly installed on the upper end face of the base, and a clamping mechanism used for clamping and fixing a PVC composite board is jointly arranged on the vertical sliding rail and the base. Various stress conditions of the PVC composite board in practical application can be simulated, the extrusion toughness of the PVC composite board can be tested at different angles and positions, and the fatigue performance and impact toughness of the PVC composite board under long-term dynamic extrusion can be evaluated through static extrusion and dynamic impact tests. The compressive toughness of the PVC composite board under different contact areas is evaluated by changing the extruded contact area, comprehensive and real performance evaluation is provided for toughness detection of the PVC composite board, it is ensured that the PVC composite board can keep good performance under various load conditions, and the safety and reliability of a product are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of PVC composite board detection, in particular to a PVC composite board physical property detection device. Background Art

[0002] PVC composite board is a board made of polyvinyl chloride and other materials through a certain process. It combines the characteristics of PVC and the advantages of other materials to make a composite material with more diverse performance. Due to its light weight, durability and easy processing, PVC composite board is widely used in architectural decoration, furniture manufacturing, waterproof engineering and other fields. As toughness is one of the most important physical properties of PVC composite board, it needs to be sampled and tested before leaving the factory to ensure that the PVC composite board is not easy to break or damage when subjected to external force, reducing potential safety hazards.

[0003] At present, there are the following shortcomings in testing the toughness of PVC composite boards: 1. During the test, the PVC composite board is usually placed at a certain angle and fixed at both ends, and then the central suspended part of the PVC composite board is squeezed to test the compressive toughness of the PVC composite board. However, under the test condition of a single angle, the compressive toughness of the material at other angles cannot be evaluated, and under the test condition of a single extrusion position, the compressive toughness of the edge of the PVC composite board will be ignored, so that the true performance of the PVC composite board under a complex use environment cannot be accurately reflected, which makes the test results limited; 2. In actual applications, PVC composite boards will encounter a variety of different contact pressure distributions. Only through a single contact area to perform an extrusion test on the PVC composite board, it is impossible to fully reflect the compressive toughness of the PVC composite board under different contact areas; 3. The PVC composite board will be subjected to dynamic or periodic extrusion in actual use. Only a static single extrusion test cannot evaluate the toughness of the PVC composite board under dynamic extrusion, and dynamic or periodic extrusion may cause material fatigue. Static testing cannot evaluate the fatigue performance of the material under long-term dynamic extrusion. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a PVC composite board physical property testing device, which is achieved by the following specific technical means: a PVC composite board physical property testing device, comprising a base, a vertical slide rail and a support arm located in front of the vertical slide rail and fixedly connected to the base are fixedly installed on the upper end surface of the base, and a clamping mechanism for clamping and fixing the PVC composite board is jointly provided on the vertical slide rail and the base; the clamping mechanism includes a supporting part jointly provided on the vertical slide rail and the base for adjusting the detection angle of the PVC composite board, a fixing part and a secondary fixing part for cooperating with the fixing part to fix the PVC composite board for a second time are provided on the supporting part, and a locking part for locking the supporting part is also provided on the supporting part.

[0005] The support arm is provided with an extrusion mechanism for performing dynamic impact and static extrusion detection on the PVC composite board; the extrusion mechanism includes a moving part arranged on the support arm, the moving part is provided with an extrusion part for cooperating with the moving part to detect different parts of the PVC composite board, and the moving part is also provided with a reciprocating part for cooperating with the extrusion part to reciprocately impact the PVC composite board.

[0006] The extrusion part is provided with an actuator for changing the contact area of ​​the extruded PVC composite board; the actuator comprises a main body part provided on the extrusion part, and a contact part is provided on the main body part.

[0007] The main body includes an articulated seat, a connecting seat and a first contact circular plate. The telescopic end of the cylinder is fixedly installed with the articulated seat, the articulated seat is hinged to the connecting seat through a set connecting shaft, and the first contact circular plate is fixedly installed on the lower end surface of the connecting seat.

[0008] The contact part includes a second contact circular plate, a third contact circular plate and a limiting ring. The second contact circular plate is threadedly connected to the ring wall of the first contact circular plate, the third contact circular plate is threadedly connected to the outer ring wall of the second contact circular plate, the first contact circular plate is fixedly installed with a limiting ring located above the second contact circular plate, and the second contact circular plate is also fixedly installed with a limiting ring located above the third contact circular plate.

[0009] As a preferred technical solution of the present invention, the support part includes a first slide, a support seat, a first screw, a first motor, a clamping base and a first spring, the upper end surface of the base is provided with a first slide located below the support arm, the first slide is slidably installed with a support seat at the front end of the vertical slide rail, and two left-right symmetrical support frames are provided on the side walls of the front and rear support seats close to each other, a first screw threadedly connected to the support seat on the rear side is installed through a bearing in the vertical slide rail, a first motor fixedly connected to the output end of the first screw is fixedly installed on the vertical slide rail, a clamping base is hinged between the two support frames on the same support seat, a rubber gasket is provided on the upper end surface of the clamping base, and a first spring is fixedly installed between the support seat on the front side and the rear end surface of the first slide.

[0010] As a preferred technical solution of the present invention, the fixing part includes a fixing block, an upper clamping plate and a second screw. The upper end surface of the clamping base is fixedly installed with a fixing block, and an upper clamping plate for cooperating with the clamping base to clamp the PVC composite board is installed on the fixing block for sliding up and down through a sliding groove. A rubber gasket is also provided on the lower end surface of the upper clamping plate, and a second screw threadedly connected to the upper clamping plate is installed through a bearing in the fixing block.

[0011] As a preferred technical solution of the present invention, the secondary fixed part includes an L-shaped fixing plate, a matching groove, a connecting rod, a hinged rod, a rocker, a second spring and a matching plug rod. The upper end surface of the clamping base is hinged with a left-right symmetrical L-shaped fixing plate, and a connecting rod is fixedly installed on the left-right symmetrical L-shaped fixing plates. The clamping base is provided with a matching groove located below the fixing block, and the clamping base is provided with a sliding hole that penetrates its upper end surface and is connected to the matching groove. A rocker with one end located below the sliding hole is hinged in the matching groove by an axial rod, and the other end of the rocker is hinged with a hinged rod hinged to the connecting rod. A second spring is fixedly installed between the upper side wall inside the matching groove and the rocker, and a matching plug rod slidably connected to the sliding hole is fixedly installed on the lower end surface of the upper clamp.

[0012] As a preferred technical solution of the present invention, the locking part includes a locking rod, a pull plate and a locking hole. The locking rod is slidably installed on the support seat located on the front side through a socket symmetrically penetrated through the left and right sides. The pull plate is fixedly installed on the upper ends of the locking rods, and a plurality of locking holes cooperating with the sockets are opened on the base in a linear array.

[0013] As a preferred technical solution of the present invention, the moving part includes a second slide, a supporting slider, a third screw and a second motor. The support arm is penetrated by a second slide, the supporting slider is slidably installed in the second slide, and a third screw threadedly connected to the supporting slider is installed in the second slide through a bearing. The support arm is fixedly installed with a second motor whose output end is fixedly connected to the third screw.

[0014] As a preferred technical solution of the present invention, the extrusion part includes a slide, a cylinder, a matching plate and a third spring. The slide is installed in a sliding manner through the support slider, and the cylinder is fixedly installed in the slide. The upper end of the slide is arc-shaped, and the hinge seat is fixedly installed on the telescopic end of the cylinder. A left-right symmetrical matching plate is fixedly installed on the upper end of the slide, and a third spring is fixedly installed between the matching plate and the support slider.

[0015] As a preferred technical solution of the present invention, the reciprocating part includes a rotating shaft seat, a third motor and a cam. The upper end surface of the supporting sliding block is fixedly installed with a left-right symmetrical rotating shaft seat through a supporting rod. A cam located above the slide cylinder is rotatably installed between the rotating shaft seats. A third motor whose output end is fixedly installed on one of the rotating shaft seats is fixedly connected to the cam.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The physical property testing device for PVC composite board can simulate various stress conditions of PVC composite board in actual application through the coordinated use of the clamping mechanism, extrusion mechanism and actuator. It can not only test the extrusion toughness of PVC composite board at different angles and positions, but also evaluate its fatigue performance and impact toughness under long-term dynamic extrusion through static extrusion and dynamic impact tests. In addition, by changing the contact area of ​​extrusion, it can accurately simulate and evaluate the compressive toughness of PVC composite board under different contact areas. These functions work together to provide a comprehensive and true performance evaluation for the toughness detection of PVC composite board.

[0017] 2. The PVC composite board physical property testing device changes the angle of the PVC composite board during the test through the coordinated use of the clamping mechanism and the extrusion mechanism, so as to test the extrusion toughness of the PVC composite board when subjected to stress at different angles under actual use conditions, and can perform extrusion toughness tests on different positions of the PVC composite board during the test, so as to more realistically simulate various stress conditions that the PVC composite board may encounter in actual use.

[0018] 3. The PVC composite board physical property testing device can apply static extrusion to the PVC composite board to test its extrusion toughness through the extrusion mechanism, and can also perform dynamic impact on the PVC composite board to test its impact toughness, so as to test the fatigue performance of the PVC composite board under long-term dynamic extrusion, thereby ensuring that the PVC composite board can maintain good performance under different load conditions through comprehensive testing, thereby improving the safety and reliability of the product.

[0019] 4. The PVC composite board physical property testing device can change the contact area of ​​direct extrusion of the PVC composite board through the set actuator to simulate the state of the PVC composite board being squeezed by contact areas of different sizes in actual applications, and directly reflect the compressive toughness of the PVC composite board under different contact areas, thereby providing a more realistic performance evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention when it is working.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the clamping mechanism of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the secondary solid part of the present invention.

[0024] Figure 5It is a schematic diagram of the cross-sectional three-dimensional structure of the secondary solid part of the present invention.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the extrusion mechanism of the present invention.

[0026] Figure 7 It is a bottom-up stereoscopic structural schematic diagram of the main body of the present invention.

[0027] Figure 8 It is a schematic cross-sectional three-dimensional structure diagram of the actuator of the present invention.

[0028] In the figure: 1, base; 2, vertical slide rail; 3, support arm; 4, clamping mechanism; 41, support part; 411, first slide; 412, support seat; 413, first screw rod; 414, first motor; 415, clamping base; 416, first spring; 42, fixing part; 421, fixing block; 422, upper clamping plate; 423, second screw rod; 43, secondary fixing part; 431, L-shaped fixing plate; 432, matching groove; 433, connecting rod; 434, hinge rod; 435, seesaw; 436, second spring; 437, matching plug rod; 44, locking part; 441, locking rod; 442, pull plate ;443, lock hole;5, extrusion mechanism;51, moving part;511, second slide;512, supporting slider;513, third screw;514, second motor;52, extrusion part;521, slide;522, cylinder;523, matching plate;524, third spring;53, reciprocating part;531, shaft seat;532, third motor;533, cam;6, actuator;61, main body;611, hinged seat;612, connecting seat;613, first contact circular plate;62, contact part;621, second contact circular plate;622, third contact circular plate;623, limit ring. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1A PVC composite board physical property testing device includes a base 1, a vertical slide rail 2 and a support arm 3 located in front of the vertical slide rail 2 and fixedly connected to the base 1 are fixedly installed on the upper end surface of the base 1, and a clamping mechanism 4 for clamping and fixing the PVC composite board is jointly provided on the vertical slide rail 2 and the base 1; the clamping mechanism 4 includes a supporting portion 41 for adjusting the detection angle of the PVC composite board which is jointly provided on the vertical slide rail 2 and the base 1, a fixing portion 42 and a secondary fixing portion 43 for cooperating with the fixing portion 42 to fix the PVC composite board for a second time are provided on the supporting portion 41, and a locking portion 44 for locking the supporting portion 41 is also provided on the supporting portion 41.

[0031] See also Figure 1 The support arm 3 is provided with an extrusion mechanism 5 for performing dynamic impact and static extrusion detection on the PVC composite board; the extrusion mechanism 5 includes a moving part 51 arranged on the support arm 3, and the moving part 51 is provided with an extrusion part 52 for cooperating with the moving part 51 to detect different parts of the PVC composite board, and the moving part 51 is also provided with a reciprocating part 53 for cooperating with the extrusion part 52 for reciprocatingly impacting the PVC composite board.

[0032] See also Figure 1 The extrusion portion 52 is provided with an actuator 6 for changing the contact area of ​​the extruded PVC composite board; the actuator 6 includes a main body 61 provided on the extrusion portion 52, and a contact portion 62 is provided on the main body 61.

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The support part 41 includes a first slideway 411, a support seat 412, a first screw rod 413, a first motor 414, a clamping base 415 and a first spring 416. The upper end surface of the base 1 is provided with a first slideway 411 located below the support arm 3. The support seat 412 is slidably installed in the first slideway 411 and at the front end of the vertical slide rail 2. Two left-right symmetrical support frames are provided on the side walls of the front and rear support seats 412 close to each other. A first screw rod 413 threadedly connected to the support seat 412 on the rear side is installed through a bearing in the vertical slide rail 2. A first motor 414 fixedly connected to the output end of the first screw rod 413 is fixedly installed on the vertical slide rail 2. A clamping base 415 is hinged between the two support frames on the same support seat 412. A rubber gasket is provided on the upper end surface of the clamping base 415. A first spring 416 is fixedly installed between the support seat 412 on the front side and the rear end surface of the first slideway 411.

[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The fixing part 42 includes a fixing block 421, an upper clamping plate 422 and a second screw 423. The fixing block 421 is fixedly installed on the upper end surface of the clamping base 415. The upper clamping plate 422 for clamping the PVC composite board in cooperation with the clamping base 415 is installed on the fixing block 421 through a sliding groove. A rubber gasket is also provided on the lower end surface of the upper clamping plate 422. A second screw 423 threadedly connected to the upper clamping plate 422 is installed in the fixing block 421 through a bearing.

[0035] During specific work, when the PVC composite board needs to be tested, the PVC composite board to be tested is placed between the support seats 412 on the front and rear sides, and then the rear end of the PVC composite board is placed on the upper end surface of the clamping base 415 on the rear side. At this time, the upper clamping plate 422 on this side is located above the PVC composite board. Then the worker holds an electric rotary tool to rotate the second screw 423 on the rear side, and the upper clamping plate 422 approaches the PVC composite board under the restriction of the slide groove until the PVC composite board is pressed against the clamping base 415 on this side. The rubber gaskets provided on the clamping base 415 and the upper clamping plate 422 are used to protect the PVC composite board and increase the clamping friction. After completing the clamping and fixing of the rear end of the PVC composite board, repeat the above operation to clamp and fix the front end of the PVC composite board, thereby completing the clamping and fixing operation of the PVC composite board before testing.

[0036] When the angle of the PVC composite board needs to be changed, the first motor 414 is started to rotate the first screw 413, thereby raising the rear support seat 412, and the front and rear clamping bases 415 will deflect along with the angle of the PVC composite board, and the front support seat 412 will slide backward in the first slide 411 to compensate for the deflection distance of the PVC composite board, and the first motor 414 will stop running when a certain angle is reached. At this time, the toughness of the PVC composite board at this angle can be tested through the extrusion mechanism 5 and the actuator 6.

[0037] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The secondary fixing part 43 includes an L-shaped fixing plate 431, a matching groove 432, a connecting rod 433, a hinge rod 434, a rocker plate 435, a second spring 436 and a matching plug rod 437. The upper end surface of the clamping base 415 is hinged with a left-right symmetrical L-shaped fixing plate 431, and the connecting rod 433 is fixedly installed on the left-right symmetrical L-shaped fixing plate 431. The clamping base 415 is provided with a matching groove 432 located below the fixing block 421. The clamping base A sliding hole is provided on 415, which passes through its upper end surface and is connected to the matching groove 432. A rocker 435 with one end located below the sliding hole is hingedly connected to the matching groove 432 by an axial rod. The other end of the rocker 435 is hingedly connected to a hinge rod 434 hinged to a connecting rod 433. A second spring 436 is fixedly installed between the upper side wall inside the matching groove 432 and the rocker 435. A matching plug-in rod 437 slidably connected to the sliding hole is fixedly installed on the lower end surface of the upper clamping plate 422.

[0038] During specific operation, when the second screw 423 is rotated to make the upper clamping plate 422 descend, the upper clamping plate 422 will descend from the sliding hole with the matching plug rod 437, and contact the end of the rocker plate 435 below the sliding hole, so that it rotates around the shaft rod, and the other end of the rocker plate 435 will push the connecting rod 433 upward through the hinge rod 434, thereby pushing the L-shaped fixing plates 431 on both sides to move toward the upper clamping plate 422. After the upper clamping plate 422 completes the clamping of the PVC composite board, the L-shaped fixing plates 431 on both sides will assist in fixing the upper clamping plate 422, and ensure the stability of the PVC composite board during the test through secondary fixation.

[0039] When it is necessary to release the clamping of the PVC composite board, the second screw 423 is rotated in the opposite direction, and the pressure of the plug 437 on the rocker 435 gradually disappears, and the second spring 436 pulls the rocker 435 back, thereby pulling the connecting rod 433 downward through the hinge rod 434, and moving the L-shaped fixing plate 431 away from the upper clamping plate 422, thereby releasing the auxiliary fixation of the upper clamping plate 422.

[0040] See also Figure 1 , Figure 2 and Figure 3 The locking portion 44 includes a locking rod 441, a pull plate 442 and a locking hole 443. The locking rod 441 is slidably installed on the support seat 412 on the front side through a socket symmetrically penetrated therethrough. The pull plate 442 is fixedly installed on the upper ends of the locking rods 441. A plurality of locking holes 443 cooperating with the sockets are provided in a linear array on the base 1.

[0041] See also Figure 1 and Figure 6The moving part 51 includes a second slide 511, a supporting slider 512, a third screw 513 and a second motor 514. The second slide 511 is penetrated through the supporting arm 3. The supporting slider 512 is slidably installed in the second slide 511. The third screw 513 threadedly connected to the supporting slider 512 is installed in the second slide 511 through a bearing. The second motor 514 whose output end is fixedly connected to the third screw 513 is fixedly installed on the supporting arm 3.

[0042] See also Figure 1 and Figure 6 The extrusion portion 52 includes a slide 521, a cylinder 522, a matching plate 523 and a third spring 524. The slide 521 is installed to slide through the support slider 512, and the cylinder 522 is fixedly installed in the slide 521. The upper end of the slide 521 is arc-shaped, and a left-right symmetrical matching plate 523 is fixedly installed on the upper end of the slide 521. The third spring 524 is fixedly installed between the matching plate 523 and the support slider 512.

[0043] See also Figure 1 and Figure 6 The reciprocating portion 53 includes a rotating shaft seat 531, a third motor 532 and a cam 533. The upper end surface of the supporting slider 512 is fixedly installed with a left-right symmetrical rotating shaft seat 531 through a supporting rod. A cam 533 located above the slide cylinder 521 is rotatably installed between the rotating shaft seats 531. A third motor 532 whose output end is fixedly connected to the cam 533 is fixedly installed on one of the rotating shaft seats 531.

[0044] See also Figure 1 , Figure 6 , Figure 7 and Figure 8 The main body 61 includes an articulated seat 611, a connecting seat 612 and a first contact circular plate 613. The telescopic end of the cylinder 522 is fixedly installed with the articulated seat 611. The articulated seat 611 is hinged to the connecting seat 612 through a set connecting shaft. The first contact circular plate 613 is fixedly installed on the lower end surface of the connecting seat 612.

[0045] During specific operation, when static testing of the PVC composite board is required, the locking rod 441 is not inserted into the socket of the front support seat 412. At this time, the cylinder 522 can be started to make its telescopic end descend with the first contact circular plate 613 and contact the upper end surface of the PVC composite board, while the third motor 532 is in an unstarted state. At this time, the third spring 524 presses the matching plate 523 upward, so that the arc at the upper end of the slide 521 fits with the cam 533, so that the slide 521 will not slide in the support slider 512. At this time, the extrusion toughness test of the PVC composite board can be carried out through the telescopic end of the cylinder 522. During the test, the front support seat 412 slides in the first slide 411 to compensate for the deformation of the PVC composite board.

[0046] After completing the test at this point on the PVC composite board, the cylinder 522 is started in reverse to retract the first contact circular plate 613, and the second motor 514 is started to rotate with the third screw 513, so that the supporting slider 512 moves with the extrusion part 52 to other positions of the PVC composite board. Similarly, the above operations are repeated to perform extrusion toughness tests on different positions of the PVC composite board to more realistically simulate various stress conditions that the PVC composite board may encounter in actual use.

[0047] When it is necessary to subject the PVC composite board to dynamic impact to test its impact toughness, the locking rod 441 is inserted into the insertion hole of the front support seat 412 through the pull plate 442, and the locking rod 441 is inserted into the locking hole 443 on the base 1, so as to lock the front support seat 412 on the base 1, and then, the third motor 532 is started to rotate with the cam 533, and during the rotation of the cam 533, its raised part will press the slide 521 downward, and the third spring 524 can ensure that the arc-shaped part of the slide 521 is always in contact with the cam 533, thereby driving the slide 521 to slide back and forth up and down in the supporting slider 512, so that the slide 521 can drive the first contact circular plate 613 under the cylinder 522 to continuously impact the surface of the PVC composite board, so as to test the impact toughness of the PVC composite board under dynamic extrusion.

[0048] See also Figure 1 , Figure 7 and Figure 8 The contact portion 62 includes a second contact circular plate 621, a third contact circular plate 622 and a limiting ring 623. The second contact circular plate 621 is threadedly connected to the ring wall of the first contact circular plate 613, and the third contact circular plate 622 is threadedly connected to the outer ring wall of the second contact circular plate 621. The first contact circular plate 613 is fixedly provided with a limiting ring 623 located above the second contact circular plate 621, and the second contact circular plate 621 is also fixedly provided with a limiting ring 623 located above the third contact circular plate 622.

[0049] During specific operation, when the contact area needs to be changed, the second contact circular plate 621 is rotated onto the first contact circular plate 613. After the second contact circular plate 621 is installed, the third contact circular plate 622 is rotated onto the second contact circular plate 621. This increases the contact area with the PVC composite board during static and dynamic tests to simulate the state in which the PVC composite board is squeezed by contact areas of different sizes in actual applications. During rotational installation, the limit ring 623 will limit the position of the third contact circular plate 622 and the second contact circular plate 621.

[0050] Then, the extrusion mechanism 5 can cooperate with the actuator 6 to implement static extrusion tests under different contact areas on the PVC composite board. At the same time, the dynamic impact test under different contact areas can also be implemented on the PVC composite board to more comprehensively simulate various stress conditions that the PVC composite board may encounter in actual applications. In the above-mentioned toughness test process of the PVC composite board, if the PVC composite board is broken, cracked or other damaged conditions occur, the test is unqualified, otherwise the test is qualified.

[0051] 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 PVC composite board physical property testing device, comprising a base (1), characterized in that: The upper end surface of the base (1) is fixedly mounted with a vertical slide rail (2) and a support arm (3) located in front of the vertical slide rail (2) and fixedly connected thereto, and the vertical slide rail (2) and the base (1) are jointly provided with a clamping mechanism (4) for clamping and fixing the PVC composite board; The clamping mechanism (4) comprises a support portion (41) provided on the vertical slide rail (2) and the base (1) for adjusting the detection angle of the PVC composite board, the support portion (41) is provided with a fixing portion (42) and a secondary fixing portion (43) for cooperating with the fixing portion (42) to perform secondary fixing on the PVC composite board, and the support portion (41) is also provided with a locking portion (44) for locking the support portion (41); The support arm (3) is provided with an extrusion mechanism (5) for performing dynamic impact and static extrusion testing on the PVC composite board; The squeezing mechanism (5) comprises a moving part (51) arranged on the support arm (3); the moving part (51) is provided with a squeezing part (52) for cooperating with the moving part (51) to detect different parts of the PVC composite board; the moving part (51) is also provided with a reciprocating part (53) for cooperating with the squeezing part (52) to reciprocate and impact the PVC composite board; The extrusion portion (52) is provided with an actuator (6) for changing the contact area of ​​the extruded PVC composite board; The actuator (6) comprises a main body (61) arranged on the extrusion part (52), and a contact part (62) is arranged on the main body (61); The main body (61) comprises an articulated seat (611), a connecting seat (612) and a first contact circular plate (613); the articulated seat (611) is hingedly connected to the connecting seat (612) via a connecting shaft, and the first contact circular plate (613) is fixedly mounted on the lower end surface of the connecting seat (612); The contact portion (62) comprises a second contact circular plate (621), a third contact circular plate (622) and a limiting ring (623); the second contact circular plate (621) is threadedly connected to the ring wall of the first contact circular plate (613); the third contact circular plate (622) is threadedly connected to the outer ring wall of the second contact circular plate (621); the limiting ring (623) located above the second contact circular plate (621) is fixedly mounted on the first contact circular plate (613); and the limiting ring (623) located above the third contact circular plate (622) is also fixedly mounted on the second contact circular plate (621).

2. A PVC composite board physical property testing device according to claim 1, characterized in that: The support portion (41) comprises a first slideway (411), a support seat (412), a first screw rod (413), a first motor (414), a clamping base (415) and a first spring (416); the upper end surface of the base (1) is provided with a first slideway (411) located below the support arm (3); a support seat (412) is slidably mounted in the first slideway (411) and at the front end of the vertical slide rail (2); two left-right symmetrical support frames are arranged on the side walls of the support seats (412) on the front and rear sides close to each other; the vertical slide rail (2) is provided with a first screw rod (413) threadedly connected to a support seat (412) at the rear side through a bearing, a first motor (414) whose output end is fixedly connected to the first screw rod (413) is fixedly installed on the vertical slide rail (2), a clamping base (415) is hingedly connected between two support frames on the same support seat (412), a rubber gasket is provided on the upper end surface of the clamping base (415), and a first spring (416) is fixedly installed between the support seat (412) at the front side and the rear end surface of the first slide rail (411).

3. A PVC composite board physical property testing device according to claim 2, characterized in that: The fixing portion (42) comprises a fixing block (421), an upper clamping plate (422) and a second screw (423); the fixing block (421) is fixedly installed on the upper end surface of the clamping base (415); an upper clamping plate (422) for clamping the PVC composite board in cooperation with the clamping base (415) is slidably installed on the fixing block (421) through a sliding groove; a rubber gasket is also provided on the lower end surface of the upper clamping plate (422); a second screw (423) threadedly connected to the upper clamping plate (422) is installed in the fixing block (421) through a bearing.

4. A PVC composite board physical property testing device according to claim 3, characterized in that: The secondary fixing part (43) comprises an L-shaped fixing plate (431), a matching groove (432), a connecting rod (433), a hinge rod (434), a rocker plate (435), a second spring (436) and a matching plug rod (437); the upper end surface of the clamping base (415) is hinged with a left-right symmetrical L-shaped fixing plate (431); the connecting rod (433) is fixedly mounted on the left-right symmetrical L-shaped fixing plates (431); the clamping base (415) is provided with a matching groove (432) located below the fixing block (421); The clamping base (415) is provided with a sliding hole that passes through its upper end surface and is connected to the matching groove (432); a seesaw (435) with one end located below the sliding hole is hingedly connected in the matching groove (432) by means of an axial rod; the other end of the seesaw (435) is hingedly connected to a hinge rod (434) hinged to the connecting rod (433); a second spring (436) is fixedly installed between the upper side wall inside the matching groove (432) and the seesaw (435); and a matching plug rod (437) slidably connected to the sliding hole is fixedly installed on the lower end surface of the upper clamp (422).

5. A PVC composite board physical property testing device according to claim 2, characterized in that: The locking portion (44) comprises a locking rod (441), a pull plate (442) and a locking hole (443); the locking rod (441) is slidably mounted on the support seat (412) located on the front side through a socket symmetrically penetrated therethrough; the pull plate (442) is fixedly mounted on the upper end of the locking rod (441); and a plurality of locking holes (443) cooperating with the socket are arranged in a linear array on the base (1).

6. A PVC composite board physical property testing device according to claim 1, characterized in that: The moving part (51) comprises a second slideway (511), a supporting slider (512), a third screw rod (513) and a second motor (514); the supporting arm (3) is provided with a second slideway (511), the supporting slider (512) is slidably mounted in the second slideway (511), a third screw rod (513) threadedly connected to the supporting slider (512) is mounted in the second slideway (511) via a bearing, and the supporting arm (3) is fixedly provided with a second motor (514) whose output end is fixedly connected to the third screw rod (513).

7. A PVC composite board physical property testing device according to claim 6, characterized in that: The extrusion portion (52) includes a slide (521), a cylinder (522), a matching plate (523) and a third spring (524); the slide (521) is installed in a sliding manner through the support slider (512); the cylinder (522) is fixedly installed in the slide (521); the hinge seat (611) is fixedly installed on the telescopic end of the cylinder (522); the upper end of the slide (521) is arc-shaped; a left-right symmetrical matching plate (523) is fixedly installed on the upper end of the slide (521); and a third spring (524) is fixedly installed between the matching plate (523) and the support slider (512).

8. A PVC composite board physical property testing device according to claim 7, characterized in that: The reciprocating part (53) comprises a rotating shaft seat (531), a third motor (532) and a cam (533); the upper end surface of the supporting slider (512) is fixedly mounted with a rotating shaft seat (531) which is symmetrical on both sides via a supporting rod; a cam (533) located above the slide cylinder (521) is rotatably mounted between the rotating shaft seats (531); a third motor (532) whose output end is fixedly connected to the cam (533) is fixedly mounted on one of the rotating shaft seats (531).

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