A flame retardant performance testing device for flame retardant modified nylon

Abstract

The present invention relates to the technical field of flame retardant performance testing, and more specifically, it relates to a flame retardant performance testing device for flame retardant modified nylon, comprising a testing host, a combustion test box arranged on one side of the testing host, and an igniter arranged in the combustion test box, a stepper motor is arranged at the top of the combustion test box, and the output shaft of the stepper motor is fixedly connected to a fixture mounting seat, a clamping mechanism is arranged in an annular array on the fixture mounting seat, and a rotating mechanism and a clamping mechanism are arranged on the clamping mechanism, the rotating mechanism comprises a rotating disk arranged on the clamping mechanism, and a rubber pad arranged on the rotating disk. The present invention solves the problem that in the current nylon modified flame retardant test, when multiple samples are placed on a fixture for combustion testing, the combustion temperature of the first tested sample will affect the sample to be burned, resulting in inaccurate test results.

Description

Technical Field

[0001] The invention relates to the technical field of flame retardant performance testing, and more specifically, to a flame retardant performance testing device for flame retardant modified nylon. Background Art

[0002] In the rapidly developing automotive industry, lightweight and safety have become important driving forces for technological innovation. Nylon, as a high-performance engineering plastic, is widely used in the manufacture of automotive parts due to its excellent mechanical properties, wear resistance and processability. However, the flammability of nylon materials limits its application potential in the field of automotive safety, especially in situations involving fire risks. Therefore, modifying nylon to improve its flame retardant properties has become one of the key measures to improve automotive safety.

[0003] In the flame retardant test of nylon modification, it is crucial to accurately evaluate the flame retardant properties of the modified materials. The traditional test method usually involves placing multiple modified nylon samples on a fixture for ignition test to observe their burning behavior and evaluate the flame retardant properties. However, this test method faces a significant technical difficulty: when the multiple samples clamped on the fixture are close to each other, the burned samples will release a lot of heat, which will have an adverse effect on the surrounding modified nylon samples to be tested.

[0004] Specifically, the heat released by the burning sample will cause the surrounding temperature to rise significantly, which in turn will increase the temperature of the sample to be tested. As a thermoplastic material, nylon's thermal stability decreases with increasing temperature, so it is easier to reach the ignition point. This means that in subsequent ignition tests, the sample to be tested may exhibit lower flame retardant properties due to the initial temperature increase, resulting in inaccurate test results.

[0005] In order to solve this problem, we proposed a flame retardant performance testing device for flame retardant modified nylon. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the problems existing in the prior art, the present invention provides a flame retardant performance testing device for flame retardant modified nylon to solve the technical problem mentioned in the background technology that in the current nylon modified flame retardant test, when multiple samples are placed on a fixture for combustion test, the combustion temperature of the first tested sample will affect the sample to be burned, resulting in inaccurate test results.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned object, the present invention provides the following technical solutions: a flame retardant property test device for flame retardant modified nylon, comprising a test host, a combustion test box disposed on one side of the test host, and an igniter disposed in the combustion test box, a stepper motor is disposed at the top of the combustion test box, and the output shaft of the stepper motor is fixedly connected to a fixture mounting seat, a clamping mechanism is disposed in an annular array on the fixture mounting seat, and a rotating mechanism and a clamping mechanism are disposed on the clamping mechanism;

[0010] The rotating mechanism comprises a rotating disk arranged on the clamping mechanism, and a rubber pad arranged on the rotating disk;

[0011] The clamping mechanism comprises a reset assembly arranged on the clamping mechanism, and an arc-shaped plate movably mounted on the reset assembly;

[0012] A driving block is arranged at the top of the inner cavity of the combustion test box, and the driving block and the arc plate are driven by abutment.

[0013] The present invention is further configured such that the clamping mechanism includes a fixing seat fixedly mounted on the fixture mounting seat, a first clamping plate and a guide rail arranged on the fixing seat, and a second clamping plate slidably mounted on the guide rail.

[0014] The present invention is further configured such that a threaded rod is rotatably mounted on the first clamping plate, and a dial is disposed at one end of the threaded rod away from the second clamping plate;

[0015] The second clamping plate is provided with a threaded hole, and the threaded rod is threadedly connected with the threaded hole.

[0016] The present invention is further configured such that the arc-shaped inner wall of the arc-shaped plate is provided with a ratchet groove, and a plurality of the ratchet grooves are provided in a ring array about the arc-shaped surface of the arc-shaped plate.

[0017] The present invention is further configured such that a reset assembly and an arc plate are provided on both the first clamping plate and the second clamping plate, and the reset assembly is provided on a side of the top end of the first clamping plate and the second clamping plate away from the rotating disk, and the arc plate is symmetrically provided on an opposite side of the first clamping plate and the second clamping plate.

[0018] The present invention is further configured such that the width of the arc-shaped plate is greater than the total thickness of the rotating disk and the rubber pad.

[0019] The present invention is further configured such that the reset assembly includes a support provided on the first clamping plate and the second clamping plate, a slide bar provided on the support, and a reset spring and a slide block provided on the slide bar.

[0020] The present invention is further configured such that the slider is an L-shaped block, and a guide hole is provided at one end of the slider, and the slider is slidably matched with the slide rod through the guide hole;

[0021] The other end of the slider is fixedly connected to the outer arc surface of the arc plate, and when the slider and the slide rod slide, the bottom end of the slider fits with the top ends of the first clamping plate and the second clamping plate.

[0022] The present invention is further configured such that a first protrusion is provided on a side of the first clamping plate away from the top end of the fixing seat, and a positioning rod is provided on a side of the first protrusion close to the second clamping plate.

[0023] The present invention is further configured such that a second protrusion is provided on a top side of the second clamping plate away from the guide rail, and a movable hole is provided on the second protrusion, and the movable hole is movably matched with the positioning rod.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the present invention provides a flame retardant performance testing device for flame retardant modified nylon, which has the following beneficial effects:

[0026] 1. In the present invention, four clamping mechanisms are arranged in a circular array on the fixture mounting seat, so that four samples can be clamped and fixed and then the flame retardant test of combustion is carried out one by one, and three of the samples are kept in a horizontal state when clamped, and the sample of the first combustion test is in a vertical state, so that the temperature of the combustion test of the sample of the first combustion test will not affect the other three samples, thereby ensuring the accuracy of the data of the combustion test of each sample.

[0027] 2. In the present invention, when the four samples are clamped one by one, they all need to be rotated to a horizontal state. By driving the motor to switch the position of the clamping mechanism, when the last sample is clamped, the clamping mechanism on the clamping mechanism of the first clamped sample conflicts with the driving block, thereby unlocking the horizontal state of the sample, so that the sample is rotated to a vertical state under the action of gravity, and an ignition test matching the igniter can be carried out. At the same time, after the sample is unlocked in the horizontal state, one side of the sample rotates and hits the positioning rod, and under the clamping of the arc plate, it can quickly and stably assume a vertical state, thereby avoiding shaking of the sample and affecting the test efficiency.

[0028] 3. The present invention arranges the positioning rod and the arc plate so that each sample is in the same position after clamping, thereby ensuring that the combustion length of each sample in the combustion test is the same, thereby improving the accuracy of the test result of each sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the flame retardant performance test device of flame retardant modified nylon;

[0030] Figure 2 It is a schematic diagram of the structure of the flame retardant modified nylon flame retardant performance test device after the sample is clamped;

[0031] Figure 3 It is a schematic diagram of the annular array structure of the clamping mechanism, the rotating mechanism and the clamping mechanism on the fixture mounting seat in the flame retardant property test device of flame retardant modified nylon;

[0032] Figure 4 It is a schematic diagram of the explosion structure of the clamping mechanism in the flame retardant property test device of flame retardant modified nylon;

[0033] Figure 5 It is a schematic diagram of the top view of the clamping mechanism in the flame retardant property test device of flame retardant modified nylon;

[0034] Figure 6 This is a schematic diagram of the structure of the curved plate in the flame retardant performance test device of flame retardant modified nylon.

[0035] In the figure: 1. test host; 2. combustion test box; 3. igniter; 4. stepper motor; 5. fixture mounting seat; 6. clamping mechanism; 601. fixing seat; 602. first clamping plate; 603. guide rail; 604. second clamping plate; 605. threaded rod; 606. toggle plate; 607. threaded hole; 7. rotating mechanism; 701. rotating plate; 702. rubber pad; 8. clamping mechanism; 801. arc plate; 802. ratchet groove; 9. reset assembly; 901. support; 902. slide rod; 903. reset spring; 904. slide block; 905. guide hole; 10. drive block; 11. first protrusion; 12. positioning rod; 13. second protrusion; 14. movable hole. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0038] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0039] See also Figure 1-6A flame retardant property test device for flame retardant modified nylon, comprising a test host 1, a combustion test box 2 arranged at one side of the test host 1, and an igniter 3 arranged in the combustion test box 2, a stepper motor 4 is arranged at the top of the combustion test box 2, and the output shaft of the stepper motor 4 is fixedly connected to a fixture mounting seat 5, a clamping mechanism 6 is arranged in a ring array on the fixture mounting seat 5, and a rotating mechanism 7 and a clamping mechanism 8 are arranged on the clamping mechanism 6;

[0040] The rotating mechanism 7 includes a rotating disk 701 disposed on the clamping mechanism 6, and a rubber pad 702 disposed on the rotating disk 701;

[0041] The clamping mechanism 8 includes a reset assembly 9 disposed on the clamping mechanism 6, and an arc-shaped plate 801 movably mounted on the reset assembly 9;

[0042] A driving block 10 is disposed at the top of the inner cavity of the combustion test box 2 , and the driving block 10 and the arc plate 801 are driven by abutment.

[0043] The combustion test box 2 is provided with a temperature sensor, a flame detector, a gas sensor, a pressure sensor, a flow sensor, etc. The temperature sensor is used to measure the temperature change in the box during the combustion process. By monitoring the temperature change, the stability of the combustion process, the flame propagation speed and the performance of the flame retardant material can be understood. The flame detector is used to detect the existence and position of the flame, and can provide real-time feedback on the state of the flame, so as to determine whether the flame retardant material has successfully prevented the spread of the flame. The gas sensor is used to detect the gas composition and concentration generated during the combustion process. By monitoring the gas composition and concentration, the chemical reaction of the combustion process and the inhibitory effect of the flame retardant material on harmful gases can be understood. The pressure sensor is used to measure the pressure change in the box during the combustion process. The pressure change reflects the intensity of the combustion process and the inhibitory effect of the flame retardant material on the explosion pressure. The flow sensor is used to monitor the gas flow to ensure the stability and accuracy of the gas supply during the combustion process.

[0044] The test host 1 is electrically connected to the temperature sensor, flame detector, gas sensor, pressure sensor, flow sensor, etc. disposed inside the combustion test box 2, and the flame retardant test data of the flame retardant modified nylon are recorded through these sensors.

[0045] The igniter 3 is arranged on an inner wall of the combustion test box 2 close to the test host 1 , and the igniter 3 is used to ignite the flame-retardant nylon strip sample to be tested fixed on the clamping mechanism 6 .

[0046] Specifically, in order to be able to fix multiple flame-retardant nylon strip samples to be tested together in the combustion test box 2 and then test them one by one to improve the test efficiency, four clamping mechanisms 6 are fixedly installed in a circular array on the clamp mounting base 5, and the flame-retardant nylon strip samples to be tested are clamped on the clamping mechanism 6 facing the observation door of the combustion test box 2.

[0047] It should be noted that when the flame-retardant nylon strip sample to be tested is clamped and fixed, it is first placed in a vertical state on the clamping end of the clamping mechanism 6 for clamping, wherein the rotating mechanism 7 is arranged at the clamping end of the clamping mechanism 6, so that the flame-retardant nylon strip sample to be tested can be rotated at an angle after being clamped through the rotation characteristics of the rotating disk 701, so that it is rotated to a horizontal state, and then the flame-retardant nylon strip sample to be tested in a horizontal state is rotated. The reset component 9 pushes the arc plate 801 to squeeze it down, thereby maintaining a nearly horizontal state, and then rotates under the drive of the stepper motor 4, so that the next clamping mechanism 6 is rotated to face the observation door of the combustion test box 2, and other flame-retardant nylon strip samples to be tested are clamped and fixed, and then the clamped flame-retardant nylon strip samples to be tested are all rotated to a horizontal state. When the last When the latter clamping mechanism 6 rotates to a position facing the observation door of the combustion test box 2, the first clamping mechanism 6 clamping the flame-retardant nylon strip sample rotates to face the igniter 3, and in the process of rotation, the arc plate 801 used to prevent the flame-retardant nylon strip sample from rotating from a horizontal state to a vertical state contacts the drive block 10, thereby sliding on the reset assembly 9, so that the arc plate 801 cannot squeeze and clamp the flame-retardant nylon strip sample, thereby making the clamping mechanism 6 in a vertical state when it rotates to face the igniter 3. At this point, except for the sample facing the igniter 3, the other three of the four flame-retardant nylon strip samples are in a horizontal state, so that when the igniter 3 ignites the vertical sample, the heat of combustion has little effect on the initial combustion end of the other three samples, thereby not affecting the subsequent combustion test.

[0048] The clamping mechanism 6 includes a fixing seat 601 fixedly mounted on the fixture mounting seat 5 , a first clamping plate 602 and a guide rail 603 arranged on the fixing seat 601 , and a second clamping plate 604 slidably mounted on the guide rail 603 .

[0049] The rotating disk 701 is rotatably mounted on the clamping end of the first clamping plate 602 and the second clamping plate 604, that is, the end away from the fixed seat 601. The second clamping plate 604 adjusts the distance between the first clamping plate 602 and the second clamping plate 604 by sliding in the guide rail 603, so that flame-retardant nylon samples of different sizes can be clamped and fixed.

[0050] A threaded rod 605 is rotatably mounted on the first clamping plate 602, and a toggle plate 606 is disposed at one end of the threaded rod 605 away from the second clamping plate 604;

[0051] A threaded hole 607 is formed on the second clamping plate 604 , and the threaded rod 605 is threadedly connected to the threaded hole 607 .

[0052] The fixing seat 601, the first clamping plate 602 and the guide rail 603 are integrally formed, and the threaded rod 605 is rotatably installed on the first clamping plate 602 through a bearing. When the rotating dial 606 drives the threaded rod 605 to rotate, the threaded rod 605 is threadedly connected with the threaded hole 607 on the second clamping plate 604, driving the second clamping plate 604 to move toward the first clamping plate 602, so that the rotating disk 701 on the first clamping plate 602 and the second clamping plate 604 clamps the sample.

[0053] The arc-shaped inner wall of the arc-shaped plate 801 is provided with a ratchet groove 802 , and a plurality of ratchet grooves 802 are provided in a circular array about the arc-shaped surface of the arc-shaped plate 801 .

[0054] By setting the ratchet groove 802, after the flame-retardant nylon sample is clamped by the first clamping plate 602 and the second clamping plate 604, it is rotated to a horizontal state by the rotating disk 701. Because the arc plate 801 contacts the flame-retardant nylon sample under the push of the reset component 9, the ratchet groove 802 on the arc plate 801 and the corner of the flame-retardant nylon sample are engaged, thereby avoiding the flame-retardant nylon sample from falling away from one end of the arc plate 801 under the drive of the stepper motor 4 due to the effect of the lever force, so that the end of the flame-retardant nylon sample that contacts the arc plate 801 is tilted and detached from the limit of the arc plate 801, so that the flame-retardant nylon sample is in a vertical state, causing the burning flame-retardant nylon sample to have a heating effect on it, thereby causing data deviation in the subsequent combustion test of flame retardancy.

[0055] The first clamping plate 602 and the second clamping plate 604 are both provided with a reset assembly 9 and an arc plate 801 , and the reset assembly 9 is arranged on the side of the top of the first clamping plate 602 and the second clamping plate 604 away from the rotating disk 701 , and the arc plate 801 is symmetrically arranged on the opposite side of the first clamping plate 602 and the second clamping plate 604 .

[0056] By providing arc plates 801 on the opposite sides of the first clamping plate 602 and the second clamping plate 604, after the rotating disk 701 clamps the flame retardant nylon sample and rotates to a horizontal state, the two symmetrical arc plates 801 respectively correspond to the two ends of the corners of the flame retardant nylon sample, thereby improving the stability of its limit clamping, so that the horizontal flame retardant nylon sample can maintain a more stable horizontal state before rotating to face the igniter 3.

[0057] The width of the arc plate 801 is greater than the total thickness of the rotating disk 701 and the rubber pad 702 .

[0058] After the rotating disk 701 and the rubber pad 702 on the first clamping plate 602 and the second clamping plate 604 clamp the flame retardant nylon sample, the arc plate 801 can resist and clamp the clamped flame retardant nylon sample. It should be noted that the minimum size of the flame retardant nylon sample needs to be larger than the distance between the rubber pad 702 of the rotating disk 701 on the first clamping plate 602 and the second clamping plate 604 when the two arc plates 801 are fitted.

[0059] The reset assembly 9 includes a support 901 disposed on the first clamping plate 602 and the second clamping plate 604 , a slide bar 902 disposed on the support 901 , and a reset spring 903 and a slider 904 disposed on the slide bar 902 .

[0060] The slider 904 is an L-shaped block, and a guide hole 905 is opened at one end of the slider 904. The slider 904 slides and matches with the slide rod 902 through the guide hole 905.

[0061] The other end of the slider 904 is fixedly connected to the outer arc surface of the arc plate 801 , and when the slider 904 and the slide rod 902 slide, the bottom end of the slider 904 fits with the top ends of the first clamping plate 602 and the second clamping plate 604 .

[0062] Specifically, when the first clamping plate 602 and the second clamping plate 604 rotate the flame retardant nylon sample, the end of the edge of the flame retardant nylon sample in the vertical state that is away from the arc plate 801 contacts and squeezes the arc plate 801 as it rotates, thereby pushing the arc plate 801 to move. The arc plate 801 moves in the direction of the reset spring 903 under the push of the edge of the top of the flame retardant nylon sample, thereby squeezing the reset spring 903. When the flame retardant nylon sample rotates to a horizontal state, assuming that the edge of the flame retardant nylon sample is not engaged with the ratchet groove 802, causing the end of the flame retardant nylon sample away from the arc plate 801 to fall and rotate, then after the rotation, the edge of the flame retardant nylon sample that is in contact with the arc plate 801 will be engaged with the ratchet groove 802, and at the same time, under the reset force of the reset spring 903, the engagement is relatively secure.

[0063] It should be noted that the ratchet grooves 802 formed in the circular array on the arc plate 801 have a small spacing therebetween. Therefore, when the flame-retardant nylon sample is rotated and the ratchet grooves 802 are engaged and adapted, although the flame-retardant nylon sample is not completely horizontal, its angle is infinitely close to horizontal, thereby preventing the flame-retardant nylon sample from being close to the sample being ignited and tested at one end away from the arc plate 801.

[0064] A first protrusion 11 is disposed on a top side of the first clamping plate 602 away from the fixing seat 601 , and a positioning rod 12 is disposed on a side of the first protrusion 11 close to the second clamping plate 604 .

[0065] A second protrusion 13 is disposed on one side of the top end of the second clamping plate 604 away from the guide rail 603 , and a movable hole 14 is formed on the second protrusion 13 , and the movable hole 14 and the positioning rod 12 are movably matched.

[0066] One end of the positioning rod 12 passing through the movable hole 14 is provided with an anti-slip block. Through the setting of the positioning rod 12, it can be ensured that the clamping position of each fixed and clamped flame-retardant nylon sample is almost the same. The specific operation method is as follows: first, one end of the flame-retardant nylon sample is inserted between the arc plate 801 and the positioning rod 12, and one side of the inserted flame-retardant nylon sample is pressed against the positioning rod 12, and then the flame-retardant nylon sample is moved upward again until the top of the flame-retardant nylon sample is away from the edge of the positioning rod 12 and presses against the inner arc surface of the arc plate 801, and then the dial is turned to drive the second clamping plate 604 to approach the first clamping plate 602 through the threaded rod 605 to clamp and fix the flame-retardant nylon sample. Such clamping and fixing makes the vertical state of the flame-retardant nylon sample almost the same, so that when it faces the igniter 3 later, the error of the initial ignition position is small, thereby improving the accuracy of the flame-retardant nylon test data.

[0067] It should be noted that the dimension of the flame-retardant nylon sample to be tested that is perpendicular to the clamping direction needs to be controlled within twice the distance from the axis of the positioning rod 12 to the vertical plane where the axis of the rotating disk 701 is located. In this way, when one side of the flame-retardant nylon sample is in contact with the positioning rod 12, the distance from the top edge of the flame-retardant nylon sample that is in contact with the arc plate 801 to the vertical plane where the axis of the rotating disk 701 is located must be smaller than the distance from the axis of the positioning rod 12 to the vertical plane where the axis of the rotating disk 701 is located. Only in this way can the edge of the top of the flame-retardant nylon sample close to the positioning rod 12 push the arc plate 801 when the flame-retardant nylon sample is rotated to a horizontal state, thereby allowing the reset force of the reset spring 903 to push the arc plate 801 to react against the edge of the flame-retardant nylon sample, thereby achieving the horizontal fixation of the flame-retardant nylon sample.

[0068] When the flame retardant test is performed on the flame retardant nylon sample, the present invention inserts and fixes a plurality of samples to be tested for combustion onto the clamping mechanism 6, wherein the sample on the clamping mechanism 6 facing the igniter 3 is in a vertical state, and the samples on the other three clamping mechanisms 6 are in a horizontal state, such as Figure 2As shown, when the end of the vertical sample away from the clamping end is ignited by the igniter 3, its combustion position is far away from the clamping end from the other horizontal samples, so that the combustion temperature is unlikely to cause a large temperature disturbance to the other three samples, and the combustion point of the vertical sample will gradually move upward. When the sample burns to one end close to the clamping mechanism 6, its combustion temperature will only cause temperature disturbance to the other three horizontally arranged samples close to the clamping end. However, when the sample is subsequently switched for combustion test, the subsequently switched sample starts to burn from away from the clamping end. Therefore, the part close to the clamping end that is disturbed by the temperature of the previous combustion test can be naturally cooled before the combustion at the lower end moves up to the upper end, so that when the combustion point moves up to the upper end, the upper end of the sample has completed cooling, thereby avoiding the temperature disturbance caused by the combustion of the previous sample.

[0069] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which will not be described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flame retardant property testing device for flame retardant modified nylon, comprising a testing host (1), a combustion test box (2) arranged on one side of the testing host (1), and an igniter (3) arranged in the combustion test box (2), wherein: A stepper motor (4) is arranged at the top of the combustion test box (2), and the output shaft of the stepper motor (4) is fixedly connected to a fixture mounting seat (5), a clamping mechanism (6) is arranged in a circular array on the fixture mounting seat (5), and a rotating mechanism (7) and a clamping mechanism (8) are arranged on the clamping mechanism (6); The rotating mechanism (7) comprises a rotating disk (701) arranged on the clamping mechanism (6), and a rubber pad (702) arranged on the rotating disk (701); The clamping mechanism (8) comprises a reset component (9) arranged on the clamping mechanism (6), and an arc-shaped plate (801) movably mounted on the reset component (9); A driving block (10) is arranged at the top of the inner cavity of the combustion test box (2), and the driving block (10) and the arc plate (801) are driven by abutment with each other; The clamping mechanism (6) comprises a fixing seat (601) fixedly mounted on the clamp mounting seat (5), a first clamping plate (602) and a guide rail (603) arranged on the fixing seat (601), and a second clamping plate (604) slidably mounted on the guide rail (603); A threaded rod (605) is rotatably mounted on the first clamping plate (602), and a dial (606) is disposed at one end of the threaded rod (605) away from the second clamping plate (604); The second clamping plate (604) is provided with a threaded hole (607), and the threaded rod (605) and the threaded hole (607) are threadedly connected; The arc-shaped inner wall of the arc-shaped plate (801) is provided with a ratchet groove (802), and a plurality of the ratchet grooves (802) are provided in a circular array with respect to the arc-shaped surface of the arc-shaped plate (801).

2. The flame retardant performance testing device of flame retardant modified nylon according to claim 1, characterized in that: A reset assembly (9) and an arc plate (801) are provided on both the first clamping plate (602) and the second clamping plate (604), and the reset assembly (9) is arranged on the side of the top of the first clamping plate (602) and the second clamping plate (604) away from the rotating disk (701), and the arc plate (801) is symmetrically arranged on the opposite side of the first clamping plate (602) and the second clamping plate (604).

3. The flame retardant performance testing device of flame retardant modified nylon according to claim 2, characterized in that: The width of the arc-shaped plate (801) is greater than the total thickness of the rotating disk (701) and the rubber pad (702).

4. The flame retardant performance testing device of flame retardant modified nylon according to claim 3, characterized in that: The reset assembly (9) includes a support (901) arranged on the first clamping plate (602) and the second clamping plate (604), a sliding rod (902) arranged on the support (901), and a reset spring (903) and a sliding block (904) arranged on the sliding rod (902).

5. The flame retardant performance testing device of flame retardant modified nylon according to claim 4, characterized in that: The slider (904) is an L-shaped block, and a guide hole (905) is provided at one end of the slider (904). The slider (904) is slidably matched with the slide rod (902) through the guide hole (905); The other end of the slider (904) is fixedly connected to the outer arc surface of the arc plate (801), and when the slider (904) and the slide rod (902) slide, the bottom end of the slider (904) fits with the top ends of the first clamping plate (602) and the second clamping plate (604).

6. The flame retardant performance testing device of flame retardant modified nylon according to claim 5, characterized in that: A first protrusion (11) is provided on a top side of the first clamping plate (602) away from the fixing seat (601), and a positioning rod (12) is provided on a side of the first protrusion (11) close to the second clamping plate (604).

7. The flame retardant performance testing device of flame retardant modified nylon according to claim 6, characterized in that: A second protrusion (13) is provided on the top side of the second clamping plate (604) away from the guide rail (603), and a movable hole (14) is provided on the second protrusion (13), and the movable hole (14) and the positioning rod (12) are movably matched.

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