Low-temperature impact test equipment for high-molecular polymer

Abstract

The utility model provides low-temperature impact test equipment for a high-molecular polymer, which comprises a heat preservation box, a high-temperature impact test device, a high-temperature impact test device, a high-temperature impact test device and a high-temperature impact test device, and is characterized in that the heat preservation box is provided with a storage area and a sample outlet; the impact device is used for carrying out an impact test on the sample strip; the automatic push-out device is provided with a placing groove and a pushing assembly, the frozen heat preservation box is detachably arranged in the placing groove, and the pushing assembly is used for automatically pushing the sample strips stored in the heat preservation box from the sample outlet to the impact device for impact testing. The high-molecular polymer low-temperature impact test device solves the problems that a low-temperature environment cannot be guaranteed, the operation speed is low and the operation is inconvenient in the prior art.

Description

Technical Field

[0001] The utility model relates to low-temperature impact testing equipment, in particular to low-temperature impact testing equipment for high molecular polymers. Background Art

[0002] Polymers are polymer compounds that are polymerized from monomers through addition polymerization or condensation polymerization. Polymers are widely used because of their advantages such as light weight, chemical resistance, stress cracking resistance, high strength, good comprehensive performance, and easy processing. However, different application fields have different requirements for the performance indicators of polymers. For polymers and their products, normal and low temperature impact performance is a very important characteristic indicator in their application, which reflects the ability of the material to resist damage caused by high impact in different environments.

[0003] The impact resistance test of polymers is to measure the impact strength of materials under impact load. In the prior art, the impact strength test is often achieved through an impact testing machine. The test of room temperature impact strength is based on the international standards "ISO179 Plastics - Determination of Simple Supported Beam Impact Properties" and "ISO180 Plastics - Determination of Izod Beam Impact Strength", so as to obtain accurate evaluation results. However, there is currently no test standard as a basis for the low temperature impact strength test, and there are many problems such as the low temperature environment cannot be guaranteed, the low temperature test is greatly affected by human factors such as operation speed, and the safety of the test environment cannot be guaranteed.

[0004] The low-temperature impact test of polymers currently used adopts the method of liquid nitrogen refrigeration. The specific process is to freeze the standard sample in the environment formed by liquid nitrogen for a certain period of time, and then take out the standard sample for rapid impact. In the process of using liquid nitrogen for cooling, the storage and use of liquid nitrogen are dangerous. There is a risk of frostbite during use. If the operation is improper, the excessive nitrogen produced by vaporization under normal pressure can reduce the oxygen partial pressure in the air. In extreme cases, it may cause hypoxia and suffocation. In case of high fever, the internal pressure of the container increases, and there is also the risk of cracking and explosion. In addition, the use of liquid nitrogen will increase the cost of the test.

[0005] When using liquid nitrogen to freeze samples, the freezing device is at a certain distance from the impact tester. It takes a certain amount of time to manually place the cryogenic specimen from the freezing device outlet on the specimen support of the impact tester for testing. The test temperature of the cryogenic specimen will rise rapidly. Since the impact strength of polymers is greatly affected by temperature, the accuracy of the test results is affected. In addition, the centering device currently commonly used in impact testers is a manual rotary centering device. During the centering process of the specimen, it will be subject to the reaction force of the centering device. On the one hand, the operation requires the cooperation of both hands, and the operation time required to adjust the position is relatively long. In addition, improper cooperation of both hands may cause the cryogenic specimen to fall off the specimen support. Therefore, the placement of the cryogenic specimen needs to be quick and efficient, which has high requirements on the operator's operating level.

[0006] That is to say, the low-temperature impact testing equipment for high molecular polymers in the prior art has the problems of being unable to guarantee a low-temperature environment, slow operating speed, and inconvenient operation. Utility Model Content

[0007] The main purpose of the utility model is to provide a low-temperature impact testing device for high molecular polymers, so as to solve the problems of the low-temperature impact testing device for high molecular polymers in the prior art, such as failure to ensure a low-temperature environment, slow operation speed and inconvenient operation.

[0008] In order to achieve the above-mentioned purpose, the utility model provides a low-temperature impact testing device for high molecular polymers, comprising: an insulation box, the insulation box having a storage area for storing sample strips and a sample outlet connected to the storage area; an impact device, the impact device is used to perform impact tests on the sample strips; an automatic ejection device, the automatic ejection device has a placement groove and a pushing component, the frozen insulation box can be detachably arranged in the placement groove, and the pushing component is used to automatically push the sample strips stored in the insulation box from the sample outlet to the impact device for impact testing.

[0009] Furthermore, the automatic ejection device also includes a box body, which has an operating space and a placement slot, the placement slot is connected to the operating space, the pushing component is arranged in the operating space, and at least a part of the pushing component can extend from the operating space into the placement slot to push the spline.

[0010] Furthermore, the automatic ejection device also includes: a connecting shaft, which is fixedly connected to the side wall of the box body; a fixing clamp, one end of which is pivotally connected to the connecting shaft; a hanging piece, which is fixedly connected to the side wall of the box body, and the connecting shaft and the hanging piece are respectively located on both sides of the placement groove, and the other end of the fixing clamp can be hung on the hanging piece to stop the insulation box in the placement groove so that the spline is pushed out of the insulation box.

[0011] Furthermore, the box body also includes: a box body having an operation space and a placement groove; at least two handles, the two handles are respectively arranged on two opposite side walls of the box body, and the placement groove is located on the connecting line of the two handles.

[0012] Furthermore, the box body also includes a plurality of height-adjustable foot supports, which are arranged at intervals on the bottom surface of the box body to adjust the height of the box body.

[0013] Furthermore, the pushing component includes: a button, which is arranged on the box of the automatic ejection device; and a pushing member, which is electrically connected to the pushing member and is used to control the working state of the pushing member.

[0014] Furthermore, the pushing member includes: a reciprocating push rod, one end of which is fixed on the inner wall of the box body, and the reciprocating push rod can extend from the operating space into the placement groove to push the spline; a program controller, the program controller is fixed in the operating space of the automatic ejection device, and the program controller is used to set the reciprocating speed and frequency of the reciprocating push rod; at least two connecting lines, one connecting line connects the program controller and the reciprocating push rod to set the program for the reciprocating push rod, and the other connecting line connects the reciprocating push rod and a button so that the button controls the working state of the reciprocating push rod.

[0015] Furthermore, the impact device includes: a support frame, a pushing assembly pushes the spline onto the support frame; an impact piece, the impact piece is arranged on one side of the support frame, and the impact piece is used to impact the spline on the support frame; a centering element, the centering element is used to align the impact piece with the center of the spline, and the height of the centering element is adjustable.

[0016] Furthermore, the centering element is a laser, and the laser emits laser light to the center of the spline.

[0017] Furthermore, the support frame includes two brackets, the two brackets are arranged at an interval, and the connecting line of the two brackets is perpendicular to the laser emitted by the laser.

[0018] Furthermore, the low-temperature impact testing equipment for high molecular polymers also includes a freezer, which is used to freeze the insulation box.

[0019] By applying the technical solution of the utility model, a low-temperature impact testing device for a high molecular polymer comprises an insulation box, an impact device and an automatic ejection device, wherein the insulation box has a storage area for storing sample strips and a sample outlet connected to the storage area; the impact device is used for performing an impact test on the sample strips; the automatic ejection device comprises a placement groove and a pushing component, the insulation box is detachably arranged in the placement groove, and the pushing component is used for pushing the sample strips stored in the insulation box from the sample outlet to the impact device for impact testing.

[0020] The insulated box in the present application can store the sample, and the insulated box storing the sample is placed in the freezer for physical freezing. After the sample is frozen, the insulated box storing the sample is quickly placed in the placement slot, which is conducive to ensuring the temperature of the sample. The height of the automatic ejection device is adjusted so that the sample outlet matches the height of the impact device, and then the pushing component is started, and the pushing component pushes the sample in the insulated box from the sample outlet of the insulated box to the impact device, and then the impact test of the sample is started. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 A schematic diagram showing the positional relationship between the heat preservation box and the automatic ejection device of an optional embodiment of the utility model is shown;

[0023] Figure 2 Shows Figure 1 A schematic diagram of the structure of the automatic ejection device;

[0024] Figure 3 A partial structural schematic diagram of an impact device of an optional embodiment of the utility model is shown.

[0025] The above drawings include the following reference numerals:

[0026] 10. Insulation box; 20. Spline; 30. Impact device; 31. Support frame; 311. Bracket; 32. Centering element; 40. Automatic ejection device; 41. Placement slot; 42. Push assembly; 421. Button; 422. Push member; 423. Program controller; 424. Connecting line; 425. Reciprocating push rod; 43. Box body; 431. Box body; 432. Handle; 433. Foot bracket; 44. Operating space; 45. Connecting shaft; 46. Fixing clamp; 47. Hanging piece. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] 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.

[0029] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0030] In order to solve the problems in the prior art of low-temperature impact testing equipment for high-molecular polymers, such as failure to ensure a low-temperature environment, slow operation speed and inconvenient operation, the utility model provides a low-temperature impact testing equipment for high-molecular polymers.

[0031] like Figures 1 to 3 As shown, the low-temperature impact testing equipment for high molecular polymers includes an insulation box 10, an impact device 30 and an automatic ejection device 40. The insulation box 10 has a storage area for storing the sample strips 20 and a sample outlet connected to the storage area; the impact device 30 is used to perform an impact test on the sample strips 20; the automatic ejection device 40 has a placement groove 41 and a pushing component 42. The frozen insulation box 10 can be detachably arranged in the placement groove 41, and the pushing component 42 is used to push the sample strips 20 stored in the insulation box 10 from the sample outlet to the impact device 30 for impact testing.

[0032] The heat preservation box 10 in the present application can store the sample 20. The heat preservation box 10 storing the sample 20 is placed in a freezer for physical freezing. After the sample 20 is frozen, the heat preservation box 10 storing the sample 20 is quickly placed in the placement slot 41, which is conducive to ensuring the temperature of the sample 20. The height of the automatic ejection device is adjusted so that the sample outlet matches the height of the impact device, and then the pushing component 42 is started. The pushing component 42 pushes the sample 20 in the heat preservation box 10 from the sample outlet of the heat preservation box 10 to the impact device 30, and then the impact test of the sample 20 is started.

[0033] Optionally, the low-temperature impact testing equipment for high molecular polymers further includes a freezer box having a freezing space, and the freezing space is used to freeze the insulation box 10 .

[0034] Since a freezer is used in the present application to perform low-temperature refrigeration on the sample 20, the purpose of cooling and freezing can be achieved without the use of liquid nitrogen, thereby avoiding the risk of frostbite during use, and at the same time avoiding the risk of suffocation due to lack of oxygen, cracking, and explosion, thereby reducing production costs.

[0035] At the same time, the present application adopts a movable insulation box 10 to achieve the insulation and movement of the low-temperature frozen sample 20, and cooperates with the automatic ejection device 40 to achieve rapid sampling and impact of the low-temperature frozen sample 20, and can quickly, accurately, conveniently and safely perform impact testing on the frozen sample 20.

[0036] It should be noted that the temperature control accuracy of the freezer is within the range of ±1°C, and the insulation time of the insulation box 10 is greater than or equal to 20 minutes.

[0037] like Figure 1 As shown, the automatic ejection device 40 also includes a box body 43, the box body 43 has an operation space 44 and a placement groove 41, the placement groove 41 is connected to the operation space 44, and the pushing component 42 is arranged in the operation space 44, and at least a part of the pushing component 42 can extend from the operation space 44 into the placement groove 41 to push the spline 20. The box body 43 provides the placement groove 41 for the heat preservation box 10, so that the heat preservation box 10 can be placed in the box body 43 after being frozen, and the placement groove 41 can limit the heat preservation box 10, reducing the risk of the heat preservation box 10 moving. An operating space 44 for accommodating the pushing component 42 is provided in the box body 43, which is conducive to the operation of the pushing component 42 to push out the spline 20 in the insulation box 10. At least a part of the pushing component 42 is connected to the operating space 44, so that the pushing component 42 and the insulation box 10 move with the box body 43 at the same time, or the automatic ejection device 40 moves synchronously as a whole, so as to ensure that the relative position between the insulation box 10 and the pushing component 42 remains unchanged, which is conducive to the pushing component 42 to quickly push the spline 20 out of the insulation box 10.

[0038] like Figure 1 and Figure 2 As shown, the automatic ejection device 40 further includes a connecting shaft 45, a fixing clip 46 and a hanging member 47. The connecting shaft 45 is fixedly connected to the side wall of the box body 43; one end of the fixing clip 46 is pivotally connected to the connecting shaft 45; the hanging member 47 is fixedly connected to the side wall of the box body 43, and the connecting shaft 45 and the hanging member 47 are respectively located on both sides of the placement groove 41, and the other end of the fixing clip 46 can be hung on the hanging member 47. The fixing clip 46 is used to stop the heat preservation box 10, so that when the pushing component 42 pushes the spline 20, the fixing clip 46 stops the heat preservation box 10, preventing the heat preservation box 10 from following the spline 20, which is conducive to the spline 20 being quickly ejected from the heat preservation box 10. The connecting shaft 45 provides a rotating shaft for the fixing clip 46, which is conducive to the fixing clip 46 being hung on the hanging member 47, ensuring the stopping effect on the heat preservation box 10, and at the same time, the fixing clip 46 is not easy to be lost, ensuring the stability of the automatic ejection device 40.

[0039] like Figure 1 and Figure 2 As shown, the box body 43 also includes a box body 431 and at least two handles 432. The box body 431 has an operation space 44 and a placement slot 41. The two handles 432 are respectively arranged on two opposite side walls of the box body 431, and the placement slot 41 is located on the connection line of the two handles 432. The arrangement of the handles 432 facilitates the movement of the box body 43.

[0040] like Figure 1 and Figure 2 As shown, the box body 43 further includes a plurality of height-adjustable foot supports 433, which are arranged at intervals on the bottom surface of the box body 431. The arrangement of the foot supports 433 makes the height of the box body 431 adjustable, and the height of the sample outlet of the spline 20 on the automatic ejection device 40 is adjustable, which is conducive to adjusting the sample outlet of the spline 20 to a position matching the height of the impact device 30, and is conducive to accurately and quickly pushing the spline 20 onto the impact device 30.

[0041] like Figure 1 and Figure 2 As shown, the push assembly 42 includes a button 421 and a push member 422. The button 421 is arranged on the housing 43 of the automatic ejection device 40; the button 421 is electrically connected to the push member 422, and the button 421 is used to control the working state of the push member 422. The button 421 is arranged on the housing 43, and when the push member 422 needs to work, the button 421 can be pressed to accurately and quickly push the spline 20 onto the impact device 30. At the same time, the push assembly 42 is arranged in the form of a button 421 and a push member 422. After clicking the button 421, the push member 422 can quickly push the spline 20 onto the impact device 30, which greatly shortens the distance and time for taking the low-temperature frozen spline, and the button 421 is close to the sample outlet, so that the single-person quick taking operation of the spline 20 can be realized.

[0042] like Figure 1 and Figure 2 As shown, the pusher 422 includes a program controller 423, at least two connecting lines 424 and a reciprocating push rod 425, one end of which is fixed on the inner wall of the box body 43, and the reciprocating push rod 425 can be extended from the operation space 44 into the placement groove 41 to push the spline 20; the program controller 423 is fixed in the operation space 44 of the automatic ejection device 40; one connecting line 424 connects the program controller 423 and the reciprocating push rod 425 to set a program for the reciprocating push rod 425, and another connecting line 424 connects the reciprocating push rod 425 and the button 421, so that the button 421 controls the working state of the reciprocating push rod 425. The reciprocating push rod 425 can be extended from the operation space 44 into the placement groove 41 to contact the spline 20, and can also be retracted from the placement groove 41 into the operation space 44 to avoid, so as to ensure that the spline in the heat preservation box 10 can smoothly fall to the spline outlet at the bottom of the heat preservation box.

[0043] Optionally, the program controller 423 is embedded in the side wall of the box body 431 .

[0044] like Figure 3As shown, the impact device 30 includes a support frame 31, an impact piece and a centering element 32. The pushing assembly 42 pushes the spline 20 onto the support frame 31. The impact piece is arranged on one side of the support frame 31, and is used to impact the spline 20 on the support frame 31. The centering element 32 is used to align the impact piece with the center of the spline 20. The arrangement of the centering element 32 is conducive to aligning the impact piece with the center of the spline 20, ensuring the accuracy of the impact position, and thus ensuring the accuracy of the test result.

[0045] The height of the centering element 32 is adjustable so that the height of the centering element 32 matches the height of the support frame 31 .

[0046] Specifically, the centering element 32 is a laser, which emits laser light to the center of the spline 20. The laser emits laser light to indicate the center of the spline 20, which is beneficial for the impact piece to impact the center of the spline 20.

[0047] It should be noted that the present application adopts laser centering to avoid the reaction force of the mechanical centering device, and can achieve rapid centering of the spline 20, thereby greatly shortening the impact time of the low-temperature spline.

[0048] In addition, the height of the centering element 32 is adjustable, and the position of the centering element 32 with adjustable height can be adjusted according to the type of impact test and the position height of the support frame 31. After adjusting the support frame 31, the position of the centering element 32 needs to be calibrated.

[0049] like Figure 3 As shown, the support frame 31 includes two brackets 311, the two brackets 311 are arranged at intervals, and the connecting line of the two brackets 311 is perpendicular to the laser emitted by the laser. The two ends of the spline 20 are respectively abutted against the two brackets 311, so that the center position of the spline 20 is exposed, which is conducive to the impact member to impact the center of the spline 20, so as to ensure the accuracy of the impact test.

[0050] The low-temperature impact testing equipment for high-molecular polymers of the present application adopts a combination of mechanical refrigeration, close-range rapid impact and laser marking rapid centering to achieve rapid, accurate, convenient and safe testing of the low-temperature impact strength of high-molecular polymers. The present application adopts a freezer to perform low-temperature freezing treatment on the sample 20, and the purpose of cooling and freezing can be achieved without using liquid nitrogen. The present application adopts a movable insulation box 10 to achieve the insulation and movement of the low-temperature frozen sample 20, and at the same time combines with the automatic ejection device 40 to achieve close-range rapid impact of the low-temperature frozen sample 20. The automatic ejection device 40 can not only realize the rapid ejection of the sample 20 after clicking the button 421, but also has an adjustable height and can be freely moved. The sample outlet of the spline 20 can be adjusted to the closest distance to the impact device 30, thereby realizing close-range rapid testing of the spline 20. The present application adopts a laser centering device to avoid the reaction force of a manual rotary centering device, and can realize rapid centering of the cryogenically frozen spline 20, thereby greatly shortening the impact placement and position adjustment time of the cryogenically frozen spline 20, and can effectively prevent the spline 20 from falling from the impact device 30, thereby ensuring the accuracy and convenience of the spline 20 test.

[0051] The method of using the low-temperature impact test equipment for polymers in the present application is to adjust the position of the centering element 32 according to the position of the support frame 31 and calibrate it. Put the standard sample 20 of the polymer into the insulation box 10, and after keeping the low temperature constant in the freezer for a certain period of time, quickly close the insulation box 10 in a low-temperature environment. After taking out the insulation box 10, place it on the automatic ejection device 40, fix the insulation box 10 with a fixing clamp 46, adjust the height of the sample outlet of the automatic ejection device 40 by rotating the foot bracket 433 at the bottom, move the automatic ejection device 40 to the closest point to the impact device 30 through the handles 432 on both sides, press the button 421, and the electric pusher 422 quickly and accurately ejects the sample 20 from the sample outlet. After placing the ejected sample 20 on the support frame 31, use the laser centering element 32 to quickly center it and then perform the impact test.

[0052] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0055] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low temperature impact test device for polymers, characterized in that: include: An insulation box (10), the insulation box (10) having a storage area for storing the sample strip (20) and a sample outlet communicated with the storage area; An impact device (30), the impact device (30) being used to perform an impact test on the spline (20); An automatic ejection device (40) is provided with a placement groove (41) and a pushing assembly (42), wherein the frozen heat preservation box (10) is detachably arranged in the placement groove (41), and the pushing assembly (42) is used to automatically push the sample (20) stored in the heat preservation box (10) from the sample outlet to the impact device (30) for impact testing.

2. The low temperature impact testing device for polymers according to claim 1, characterized in that: The automatic ejection device (40) further comprises a box body (43), the box body (43) having an operating space (44) and the placement groove (41), the placement groove (41) being in communication with the operating space (44), the pushing component (42) being arranged in the operating space (44), and at least a portion of the pushing component (42) being able to extend from the operating space (44) into the placement groove (41) to push the spline (20).

3. The low temperature impact testing device for polymers according to claim 2, characterized in that: The automatic ejection device (40) further comprises: A connecting shaft (45), wherein the connecting shaft (45) is fixedly connected to a side wall of the box body (43); A fixing clamp (46), one end of which is pivotally connected to the connecting shaft (45); A hanging piece (47) is fixedly connected to the side wall of the box body (43), and the connecting shaft (45) and the hanging piece (47) are respectively located on both sides of the placement groove (41), and the other end of the fixing clip (46) can be hung on the hanging piece (47) to stop the heat preservation box (10) in the placement groove (41) so that the spline (20) is pushed out of the heat preservation box (10).

4. The low temperature impact testing device for polymers according to claim 2, characterized in that: The box (43) also includes: A box body (431), wherein the box body (431) has the operating space (44) and the placement slot (41); At least two handles (432) are provided, the two handles (432) being respectively arranged on two opposite side walls of the box body (431), and the placement groove (41) is located on the connection line of the two handles (432).

5. The low temperature impact testing device for polymers according to claim 4, characterized in that: The box body (43) further comprises a plurality of height-adjustable foot supports (433), wherein the plurality of foot supports (433) are arranged at intervals on the bottom surface of the box body (431) to adjust the height of the box body (431).

6. The low temperature impact testing device for polymers according to any one of claims 1 to 5, characterized in that: The pushing assembly (42) comprises: A button (421), wherein the button (421) is arranged on a box (43) of the automatic ejection device (40); A pushing member (422), the button (421) is electrically connected to the pushing member (422), and the button (421) is used to control the working state of the pushing member (422).

7. The low temperature impact testing device for polymers according to claim 6, characterized in that: The pushing member (422) comprises: a reciprocating push rod (425), one end of which is fixed on the inner wall of the box (43), and the reciprocating push rod (425) can extend from the operating space (44) of the box (43) into the placement groove (41) to push the spline (20); A program controller (423), the program controller (423) being fixed in the operating space (44) of the automatic ejection device (40), the program controller (423) being used to set the reciprocating speed and frequency of the reciprocating push rod (425); At least two connecting lines (424), one connecting line (424) connects the program controller (423) and the reciprocating push rod (425) to set a program for the reciprocating push rod (425), and the other connecting line (424) connects the reciprocating push rod (425) and the button (421) to enable the button (421) to control the working state of the reciprocating push rod (425).

8. The low temperature impact testing device for polymers according to any one of claims 1 to 5, characterized in that: The impact device (30) comprises: A support frame (31), wherein the pushing assembly (42) pushes the spline (20) onto the support frame (31); An impact piece, the impact piece being arranged on one side of the support frame (31), and being used to impact the spline (20) on the support frame (31); A centering element (32) is used to align the impact piece with the center of the spline (20), and the height of the centering element (32) is adjustable.

9. The low temperature impact testing device for polymers according to claim 8, characterized in that: The centering element (32) is a laser, which emits laser light to the center of the spline (20).

10. The low temperature impact testing device for polymers according to claim 9, characterized in that: The support frame (31) comprises two brackets (311), the two brackets (311) are arranged at an interval, and the connecting line of the two brackets (311) is perpendicular to the laser emitted by the laser.

11. The low temperature impact testing device for polymers according to any one of claims 1 to 5, characterized in that: The low-temperature impact testing equipment for high molecular polymers also includes a freezer box, which is used to freeze the heat preservation box (10).

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