Scratch testing device for high polymer material

Abstract

The invention provides a scraping test device for a high polymer material, and belongs to the technical field of material scraping performance test. Comprising a base, two sets of sliding rails are symmetrically arranged on the two sides of the base, the sliding rails are sleeved with sliding blocks, a sliding frame is connected between the sliding blocks, a fixing clamp is arranged on the base, and a recycling groove is formed in one side of the sliding frame. By arranging the recovery assembly and the replacement assembly, the diversity and practicability of the scraping structure are improved, the influence of the abraded scraping head on the precision of a machine tool during use is reduced, the situation that the scraping head is excessively abraded in the scraping process and influences a test result is avoided, the scraping head is conveniently and rapidly replaced, frequent manual replacement is avoided, and the working efficiency is improved. The testing diversity is improved, the situation that a result can be obtained only through single testing each time or multiple times of testing is avoided, and the abrasion conditions of different movement modes or scratches of different sizes can be conveniently and directly compared.

Description

Technical Field

[0001] The invention relates to the technical field of material scratch performance testing, and in particular to a scratch testing device for polymer materials. Background Art

[0002] Surface quality is an important factor affecting the application of polymer materials. Scratching is the process in which a hard scraper controlled by load or displacement slides on the surface of a material at a certain speed. Surface scratch damage will affect the appearance, structural integrity and durability of polymer materials. Therefore, scratch test equipment is widely used to characterize the scratch resistance of polymer material surfaces.

[0003] Existing scratch testing equipment usually uses a weight to squeeze the scraper head to scrape the test material back and forth. During the scraping operation, with multiple tests, the scraper head part will be severely worn, and the scraper rod needs to be replaced manually frequently. At the same time, the test area needs to be calculated for nodes during the test. The existing cross-staggered test path requires the operator to remove the test material and reverse the direction before testing, which affects the test accuracy and easily leads to unclear data and low test efficiency. At the same time, most scratch testing devices can only perform a single test each time, or it is difficult to use scraper heads of different diameters for testing. If you need to know the results under different working conditions, you need to perform multiple tests, and the process is very cumbersome.

[0004] Therefore, the present application provides a scratch testing device for polymer materials to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a scratch testing device for polymer materials to solve the problem that the existing scratch testing equipment usually uses a weight to squeeze the scraping head to scrape the test material back and forth. During the scraping operation, the scraping wear is serious and the scraping rod needs to be replaced. During the test, the test area needs to be calculated for nodes. The existing cross-staggered test path requires the operator to remove the test material and reverse the direction, which affects the test accuracy and easily leads to unclear data. Most scratch testing devices can only perform a single test each time, or it is difficult to use scraping heads of different diameters for testing, resulting in low test efficiency.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A scratch test device for polymer materials, comprising a base, two sets of slide rails are symmetrically arranged on both sides of the base, sliders are sleeved on the outer sides of the slide rails, a slide frame is connected between the sliders, a fixing clamp is arranged on the base, a recovery groove is arranged on one side of the slide frame, and a contact block is arranged on one side of the recovery groove; further comprising a motion component, the motion component is mounted on the top of the base, the motion component is used to drive the scraping structure to move; a scraping component, the scraping component is mounted on the inner side of the slide frame, the scraping component is used to perform a scratch test on the polymer material to be tested; a replacement component , the replacement component is installed on the inner side of the scraping component, and the replacement component is used to replace the scraping component; the recycling component, the recycling component is installed on one side of the replacement component, and the recycling component is used to recycle the replaced scraping component, the fixed component includes an electric control turntable, the electric control turntable is nested and installed on the inner side of the bottom end of the sliding frame, the electric control turntable rotates on the inner side of the bottom end of the sliding frame, an installation box is nested and installed on the inner side of the electric control turntable, the installation box slides on the inner side of the slide groove of the electric control turntable, a reciprocating screw rod is nested on one side of the installation box, and the reciprocating screw rod is installed on the bottom end of the electric control turntable.

[0007] Optionally, a limit rod is nested on one side of the installation box, the limit rod is installed at the bottom end of the electric control turntable, and three groups of installation holes are equidistantly arranged on the inner side of the installation box.

[0008] Optionally, one end of the reciprocating screw is connected to a driving motor, the driving motor is installed at the bottom end of the electric control turntable, and a counter is installed on the inner wall of the installation box.

[0009] Optionally, the scraping assembly includes a connecting rod, and the connecting rod slides on the inner sides of the three groups of mounting holes respectively, and the bottom end of the connecting rod is connected to a scraping rod.

[0010] Optionally, a connecting hole is provided on the inner side of the scraping rod, and two stoppers 1 are symmetrically connected to the inner side of the connecting hole through a torsion spring, and the stoppers 1 rotate on the inner side wall of the connecting hole.

[0011] Optionally, two stoppers 2 are symmetrically connected to the inner side of the connecting hole through a torsion spring, and the stoppers 2 rotate on the inner wall of the connecting hole. Scraping heads are equidistantly distributed on the inner side of the connecting hole, and two limiting rings are equidistantly sleeved on the outer side of the scraping heads. The top of the connecting rod is connected to an elastic telescopic rod through bolts, and a weight is provided on the top of the elastic telescopic rod.

[0012] Optionally, the replacement component includes a one-way gear, which is installed on the inner side of the installation box, the one-way gear rotates on the inner wall of the installation box, the one-way gear is meshed with rack 1, and the rack 1 slides on the inner wall groove of the installation box.

[0013] Optionally, the end of rack one is connected to a connecting frame, the bottom end of the connecting frame is equidistantly provided with push plates, the one-way gear is meshed with rack two, one side of rack two is connected to an electric push rod, and the electric push rod is installed on one side of the sliding frame.

[0014] Optionally, the recovery component includes a servo motor, which is installed at the end of the electric push rod. The servo motor is connected to a rotating rod. The servo motor is connected to a counter through a cable. The bottom end of the rotating rod is connected to a connecting plate 1, and the bottom end of the connecting plate 1 is connected to a telescopic rod.

[0015] Optionally, the bottom end of the telescopic rod is connected to a second connecting plate, one side of the second connecting plate is equidistantly mounted with clamping blocks, and a permanent magnet is disposed on the inner side of the clamping blocks.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a motion component and driving the electric-controlled turntable and the reciprocating screw, a variety of scraping motion modes with different forces on the test material can be realized. This is different from the reciprocating linear scraping test in the existing test method, and the existing test path is simplified. At the same time, the test path is repeatable, which can ensure the test accuracy and has three groups of scraping control groups with different forces, thereby improving the test efficiency.

[0017] By setting up a recovery component and a replacement component, the scraper head is automatically recovered using a permanent magnet, and the scraper head is pushed into the scraper rod for replenishment through the meshing movement of the one-way gear and rack one and rack two, thereby improving the applicability of the scraping structure, reducing the impact of the worn scraper head on the accuracy of the machine tool when in use, and avoiding excessive wear of the scraper head during the scraping process, which affects the test results.

[0018] It can realize a variety of scraping motion modes with different forces on the test material, ensuring that scratch tests can be carried out on multiple areas of the test material. Different from the reciprocating linear scraping test in the existing test method, the circular scraping motion is carried out around the central axis of the electric control turntable. Since the test material is contacted and scraped by only three groups of scraping heads of different sizes, the diversity of the test is improved, avoiding only a single test each time, or the need for multiple tests to obtain results. It is convenient to directly compare the wear conditions of different motion modes or different sizes of scrapes, and is more conducive to understanding the anti-scratch properties of the material.

[0019] When the number of scraping circles recorded by the counter reaches the set wear limit, the scraper head falls to the lower side by rotating the stopper 2 on the inner wall of the connecting hole through the torsion spring. The stopper 2 is reset after the scraper head passes through, and the scraper head is separated from the scraper rod. The servo motor drives the rotating rod to rotate 180°, so that the connecting plate 1 drives the connecting plate 2 to move through the telescopic rod. When the three groups of scraper heads of different sizes reach the top of the recovery groove, they are separated from the permanent magnet by contacting the contact block and fall into the recovery groove, so as to achieve the effect of quickly replacing the scraper head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the scratch testing device of the present invention; Figure 2 It is a rear view of the three-dimensional structure of the scratch testing device of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the recovery tank and the contact block assembly of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the motion component of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the positional relationship between the mounting box, mounting holes and counter of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the scraping assembly of the present invention; Figure 7 A sectional view of the inner three-dimensional structure of the scraping rod of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the assembly of stopper 1, stopper 2 and the scraping head of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the scraping component and the replacement component of the present invention; Fig.10 This is a schematic diagram of the three-dimensional structure of the replacement component of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the recycling component of the present invention.

[0022] Reference numerals: 1. Base; 2. Slide rail; 3. Sliding block; 4. Sliding frame; 5. Motion assembly; 51. Electric control turntable; 52. Mounting box; 53. Reciprocating screw rod; 54. Limit rod; 55. Mounting hole; 56. Driving motor; 57. Counter; 6. Scraping assembly; 61. Connecting rod; 62. Scraping rod; 63. Connecting hole; 64. Stopper 1; 65. Stopper 2; 66. Scraping head; 67. Limit ring; 68. Elastic Telescopic rod; 69, weight; 7, replacement assembly; 71, one-way gear; 72, rack 1; 73, connecting frame; 74, push plate; 75, rack 2; 76, electric push rod; 8, recovery assembly; 81, servo motor; 82, rotating rod; 83, connecting plate 1; 84, telescopic rod; 85, connecting plate 2; 86, clamping block; 87, permanent magnet; 9, fixing fixture; 10, recovery slot; 11, contact block.

[0023] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0024] The following is a detailed description of a scratch test device for polymer materials provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0025] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0026] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0027] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0028] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0029] like Figures 1 to 11 As shown, an embodiment of the present invention provides a scratch testing device for polymer materials, including a base 1, two groups of slide rails 2 are symmetrically arranged on both sides of the base 1, sliders 3 are sleeved on the outer sides of the slide rails 2, and slide frames 4 are connected between the sliders 3, a fixing fixture 9 is arranged on the base 1, a recovery groove 10 is arranged on one side of the slide frame 4, and a contact block 11 is arranged on one side of the recovery groove 10, and also includes a motion component 5, the motion component 5 is installed on the top of the base 1, and the motion component 5 is used to drive the scraping structure to move, a scraping component 6, the scraping component 6 is installed on the inner side of the slide frame 4, and the scraping component 6 is used to perform a scratch test on the polymer material to be tested, a replacement component 7, the replacement component 7 is installed on the inner side of the scraping component 6, and the replacement component 7 is used to replace the scraping component, and a recovery component 8, the recovery component 8 is installed on one side of the replacement component 7, and the recovery component 8 is used to recover the replaced scraping component.

[0030] like Figures 4 to 5As shown, the motion assembly 5 includes an electric control turntable 51, which is nested and installed on the inner side of the bottom end of the sliding frame 4, and the electric control turntable 51 rotates on the inner side of the bottom end of the sliding frame 4. A mounting box 52 is nested and installed on the inner side of the electric control turntable 51, and the mounting box 52 slides on the inner side of the slide groove of the electric control turntable 51. A reciprocating screw rod 53 is nested on one side of the mounting box 52, and the reciprocating screw rod 53 is installed on the bottom end of the electric control turntable 51. A limit rod 54 is nested on one side of the mounting box 52, and the limit rod 54 is installed on the bottom end of the electric control turntable 51. Three groups of mounting holes 55 are equidistantly arranged on the inner side of the mounting box 52, one end of the reciprocating screw rod 53 is connected to a driving motor 56, and the driving motor 56 is installed on the bottom end of the electric control turntable 51. A counter 57 is installed on the inner side wall of the mounting box 52, and a limit groove 58 is arranged on the inner side of the mounting box 52. By setting the motion component 5, when performing the scraping test, the operator can first drive the slider 3 to move the sliding frame 4 to the area to be tested through the control module (not marked in the figure), and then drive the electric control turntable 51 to rotate through the control module, and three groups of scraping rods 62 and scraping heads 66 of different sizes scrape the surface of the test material around the rotation center, and the counter 57 is used to record the number of scraping circles, and a circular scraping test is performed around the central axis of the electric control turntable 51. At the same time, the reciprocating screw 53 can be driven to rotate by the driving motor 56, so that the installation box 52 performs a lateral reciprocating motion under the limit of the limit rod 54, so that the three groups of scraping rods 62 and scraping heads 66 of different sizes are When the electric-controlled turntable 51 stops, the surface of the test material can perform a lateral scraping motion on the electric-controlled turntable 51, and a variety of scraping motion modes with different forces on the test material can be realized, ensuring that scratch tests can be performed on multiple areas of the test material. Different from the reciprocating linear scraping test in the existing test method, a circular scraping motion is performed around the central axis of the electric-controlled turntable 51. Since the test material is contacted and scraped only by three groups of scraping heads 66 of different sizes, the existing test path is simplified. At the same time, the test path is repeatable, which can ensure the test accuracy. It also has three groups of scraping control groups with different forces, which improves the test efficiency, reduces the accuracy requirements for equipment, and facilitates operators to conduct comparative observations.

[0031] like Figures 6 to 9As shown, the scraping assembly 6 includes a connecting rod 61, which slides on the inner sides of the three groups of mounting holes 55 respectively, and a scraping rod 62 is connected to the bottom end of the connecting rod 61. The scraping rods 62 connected to the bottom ends of the three groups of connecting rods 61 have different diameters, and a connecting hole 63 is arranged on the inner side of the scraping rod 62. Two stoppers 64 are symmetrically connected to the inner side of the connecting hole 63 through a torsion spring, and the stoppers 64 rotate on the inner side walls of the connecting hole 63. Two stoppers 65 are symmetrically connected to the inner side of the connecting hole 63 through a torsion spring, and the stoppers 65 rotate on the inner side walls of the connecting hole 63. Scraping heads 66 are equidistantly arranged on the inner side of the connecting hole 63, and two limiting rings 67 are equidistantly sleeved on the outer sides of the scraping heads 66. The top end of the connecting rod 61 is connected to an elastic telescopic rod 68 through bolts, and a weight 69 is arranged on the top end of the elastic telescopic rod 68.

[0032] By setting the scraping assembly 6, the operator clamps the polymer material to be tested on the fixing fixture 9 through the fixing fixture 9, and respectively connects the weights 69 of different weights to the top of the three sets of elastic telescopic rods 68 with bolts, so that the bottom ends of the weights 69 are in contact with the top surface of the installation box 52, so that when the scraping head 66 contacts the test material, due to the force on the top, the scraping head 66 can continue to be subjected to the downward pressure of the weight 69 to perform a scraping test on the test material. The scraping heads 66 are arranged vertically, and the scraping heads 66 are arranged vertically. The previous scraper head 66 is under pressure and falls downward through the stopper 65. Due to the gravity of the scraper head 66 above, the two limit rings 67 squeeze the stoppers 64 on both sides of the connecting hole 63, causing the stopper 64 to flip downward and then reset through the torsion spring. Then the limit ring 67 located below squeezes the stoppers 65 on both sides of the connecting hole 63, causing the stopper 65 to flip downward and then reset through the torsion spring. Finally, the limit ring 67 located above is located between the stoppers 64 and 65.

[0033] like Figures 9 and 10 As shown, the replacement component 7 includes a one-way gear 71, which is installed on the inner side of the installation box 52, and the one-way gear 71 rotates on the inner wall of the installation box 52. The one-way gear 71 is meshed with a rack 1 72, and the rack 1 72 slides on the inner wall groove of the installation box 52. The end of the rack 1 72 is connected to a connecting frame 73, and the bottom end of the connecting frame 73 is equidistantly provided with push plates 74. The one-way gear 71 is meshed with a rack 2 75, and one side of the rack 2 75 is connected to an electric push rod 76, which is installed on one side of the sliding frame 4.

[0034] By setting the replacement component 7, when the electric push rod 76 moves downward, it drives the rack 2 75 to move. The rack 2 75 meshes with the one-way gear 71 during the downward movement. The one-way gear 71 rotates, and the one-way gear 71 meshes with the rack 1 72. The rack 1 72 drives the connecting frame 73 to move. The pushing plate 74 on the connecting frame 73 pushes the unused scraping head 66 from one side of the connecting rod 61 into the inner side of the connecting hole 63. The scraping heads 66 are arranged vertically, and the previous scraping head 6 6 is subjected to pressure and falls downward through the stopper 2 65. Under the gravity of the scraper head 66 above, the two limiting rings 67 squeeze the stopper 1 64 on both sides of the connecting hole 63, causing the stopper 1 64 to flip downward and then reset through the torsion spring. Then the limiting ring 67 located below squeezes the stopper 2 65 on both sides of the connecting hole 63, causing the stopper 2 65 to flip downward and then reset through the torsion spring. Finally, the limiting ring 67 located above is located between the stopper 1 64 and the stopper 2 65.

[0035] like Figures 10 to 11 As shown, the recovery component 8 includes a servo motor 81, which is installed at the end of the electric push rod 76. The servo motor 81 is connected to a rotating rod 82. The servo motor 81 is connected to the counter 57 through a cable. The bottom end of the rotating rod 82 is connected to a connecting plate 1 83, the bottom end of the connecting plate 1 83 is connected to a telescopic rod 84, the bottom end of the telescopic rod 84 is connected to a connecting plate 2 85, and one side of the connecting plate 2 85 is equidistantly installed with clamping blocks 86, and a permanent magnet 87 is arranged on the inner side of the clamping block 86.

[0036] By setting the recovery component 8, when the number of scraping circles recorded by the counter 57 reaches the set wear upper limit, the counter 57 sends an electrical signal to the servo motor 81, so that the servo motor 81 drives the rotating rod 82 to rotate 180 degrees, so that the connecting plate 1 83 drives the connecting plate 2 85 to move through the telescopic rod 84, and the three groups of clamping blocks 86 on one side of the connecting plate 2 85 are respectively in contact with the corresponding scraping head 66, and the permanent magnet 87 on the inner side of the clamping block 86 adsorbs and fixes the scraping head 66. After the clamping block 86 contacts the corresponding scraping head 66, the electric push rod 76 is pushed downward, so that the clamping block 86 and the permanent magnet 87 squeeze the corresponding scraping head 66 downward. The limiting ring 67 located at the bottom causes the limiting ring 67 located at the top outside the scraper head 66 to squeeze the stop blocks 65 on both sides downward, so that the stop blocks 65 rotate on the inner wall of the connecting hole 63 through the torsion spring, so that the scraper head 66 falls to the downward side, and the stop block 65 is reset after the scraper head 66 passes through, and the scraper head 66 is separated from the scraper rod 62, and the servo motor 81 drives the rotating rod 82 to rotate 180°, so that the connecting plate 1 83 drives the connecting plate 2 85 to move through the telescopic rod 84, and when the three groups of scraper heads 66 of different sizes reach the top of the recovery groove 10, they are separated from the permanent magnet 87 by contacting the contact block 11 and fall into the recovery groove 10.

[0037] The working principle of the technical solution provided by the present invention is as follows: When using the device, the operator clamps the polymer material to be tested on the fixing fixture 9 through the fixing fixture 9, and uses bolts to connect weights 69 of different weights to the top of the three groups of elastic telescopic rods 68, so that the bottom ends of the weights 69 are in contact with the top surface of the installation box 52. Therefore, when the scraping head 66 contacts the test material, due to the force on the top, the scraping head 66 can continue to be subjected to the downward pressure of the weights 69 to perform a scraping test on the test material.

[0038] When performing a scraping test, the operator can first move the slider 3 to drive the sliding frame 4 to move to the area to be tested through the control module (not marked in the figure), and then drive the electric control turntable 51 to rotate through the control module, so that three groups of scraping rods 62 and scraping heads 66 of different sizes scrape on the surface of the test material around the rotation center, and the counter 57 is used to record the number of scraping circles, and a circular scraping test is performed around the central axis of the electric control turntable 51. At the same time, the reciprocating screw rod 53 can be driven to rotate by the driving motor 56, so that the installation box 52 performs a lateral reciprocating motion under the limit of the limit rod 54, so that the three groups of scraping rods 62 and scraping heads 66 of different sizes are on the surface of the test material. The surface can perform a lateral scraping motion on the electric-controlled turntable 51 when the electric-controlled turntable 51 stops, and can realize a variety of scraping motion modes with different forces on the test material, ensuring that scratch tests can be performed on multiple areas of the test material. Different from the reciprocating linear scraping test in the existing test method, the circular scraping motion is performed around the central axis of the electric-controlled turntable 51. Since the test material is contacted and scraped by only three groups of scraping heads 66 of different sizes, the existing test path is simplified. At the same time, the test path is repeatable, which can ensure the test accuracy. It also has three groups of scraping control groups with different forces, which improves the test efficiency, reduces the accuracy requirements for equipment, and facilitates operators to conduct comparative observations.

[0039] When the number of scraping circles recorded by the counter 57 reaches the set wear limit, the counter 57 sends an electrical signal to the servo motor 81, so that the servo motor 81 drives the rotating rod 82 to rotate 180 degrees, so that the connecting plate 1 83 drives the connecting plate 2 85 to move through the telescopic rod 84, and the three groups of clamping blocks 86 on one side of the connecting plate 2 85 are respectively in contact with the corresponding scraping head 66, and the permanent magnet 87 on the inner side of the clamping block 86 adsorbs and fixes the scraping head 66. After the clamping block 86 contacts the corresponding scraping head 66, the electric push rod 76 pushes downward, so that the clamping block 86 and the permanent magnet 87 squeeze the corresponding scraping head 66 on the outer side below. The limiting ring 67 causes the limiting ring 67 located above the outer side of the scraper head 66 to squeeze the stopper blocks 65 on both sides downward, so that the stopper blocks 65 rotate on the inner wall of the connecting hole 63 through the torsion spring, so that the scraper head 66 falls to the downward side, and the stopper blocks 65 are reset after the scraper head 66 passes through, and the scraper head 66 is separated from the scraper rod 62. The servo motor 81 drives the rotating rod 82 to rotate 180°, so that the connecting plate 1 83 drives the connecting plate 2 85 to move through the telescopic rod 84, and when the three groups of scraper heads 66 of different sizes reach the top of the recovery groove 10, they are separated from the permanent magnet 87 by contacting the contact block 11 and fall into the recovery groove 10.

[0040] When the electric push rod 76 moves downward, it drives the rack 2 75 to move. The rack 2 75 meshes with the one-way gear 71 during the downward movement. The one-way gear 71 rotates, and the one-way gear 71 meshes with the rack 1 72. The rack 1 72 drives the connecting frame 73 to move. The push plate 74 on the connecting frame 73 pushes the unused scraper head 66 from one side of the connecting rod 61 into the inner side of the connecting hole 63. The scraper heads 66 are arranged vertically. When the previous scraper head 66 is pressed through the block Block 2 65 falls downward and, under the gravity of the scraping head 66 above, two limiting rings 67 squeeze block 1 64 on both sides of the connecting hole 63, causing block 1 64 to flip downward and then be reset by a torsion spring. Then, the limiting ring 67 at the bottom squeezes block 2 65 on both sides of the connecting hole 63, causing block 2 65 to flip downward and then be reset by a torsion spring. Finally, the limiting ring 67 at the top is located between block 1 64 and block 2 65, completing the reset work.

[0041] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0042] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A scratch test device for polymer materials, comprising a base, characterized in that: Two sets of slide rails are symmetrically arranged on both sides of the base, sliders are sleeved on the outer sides of the slide rails, a slide frame is connected between the sliders, a fixing fixture is arranged on the base, a recovery groove is arranged on one side of the slide frame, and a contact block is arranged on one side of the recovery groove; It also includes a motion component, which is installed on the top of the base and is used to drive the scraping structure to move; A scraping assembly, the scraping assembly is installed on the inner side of the sliding frame, and the scraping assembly is used to perform a scraping test on the polymer material to be tested; A replacement component, the replacement component is installed on the inner side of the scraping component, and the replacement component is used to replace the scraping component; A recycling component, the recycling component is installed on one side of the replacement component, and the recycling component is used to recycle the replaced scraping component; The fixing assembly includes an electric control turntable, which is nested and installed inside the bottom end of the sliding frame, and the electric control turntable rotates inside the bottom end of the sliding frame; A mounting box is nested inside the electric control turntable, and the mounting box slides inside the slide slot of the electric control turntable. A reciprocating screw rod is nested on one side of the mounting box, and the reciprocating screw rod is installed at the bottom end of the electric control turntable.

2. The scratch testing device for polymer materials according to claim 1, characterized in that: A limiting rod is nested on one side of the installation box, and the limiting rod is installed at the bottom end of the electric control turntable. Three groups of installation holes are equidistantly arranged on the inner side of the installation box.

3. The scratch testing device for polymer materials according to claim 2, characterized in that: One end of the reciprocating screw rod is connected to a driving motor, and the driving motor is installed at the bottom end of the electric control turntable. A counter is installed on the inner side wall of the installation box.

4. The scratch testing device for polymer materials according to claim 3, characterized in that: The scraping assembly comprises a connecting rod, and the connecting rod slides inside the three groups of mounting holes respectively, and the bottom end of the connecting rod is connected to a scraping rod.

5. The scratch testing device for polymer materials according to claim 4, characterized in that: A connecting hole is arranged on the inner side of the scraping rod, and two stoppers 1 are symmetrically connected to the inner side of the connecting hole through a torsion spring, and the stoppers 1 rotate on the inner side wall of the connecting hole.

6. The scratch testing device for polymer materials according to claim 5, characterized in that: The inner side of the connecting hole is symmetrically connected with two stoppers 2 via a torsion spring, and the stoppers 2 rotate on the inner wall of the connecting hole. Scraping heads are evenly spaced on the inner side of the connecting hole, and two limiting rings are evenly spaced on the outer side of the scraping heads. The top end of the connecting rod is connected with an elastic telescopic rod via bolts, and a weight is provided on the top end of the elastic telescopic rod.

7. The scratch testing device for polymer materials according to claim 6, characterized in that: The replacement component includes a one-way gear, which is installed on the inner side of the installation box. The one-way gear rotates on the inner wall of the installation box. The one-way gear is meshed with rack 1, and rack 1 slides on the inner wall groove of the installation box.

8. The scratch testing device for polymer materials according to claim 7, characterized in that: The end of the rack one is connected to a connecting frame, and the bottom end of the connecting frame is equidistantly provided with push plates. The one-way gear is meshed with the rack two, and one side of the rack two is connected to an electric push rod, which is installed on one side of the sliding frame.

9. The scratch testing device for polymer materials according to claim 8, characterized in that: The recovery component includes a servo motor, which is installed at the end of the electric push rod. The servo motor is connected to a rotating rod. The servo motor is connected to a counter through a cable. The bottom end of the rotating rod is connected to a connecting plate 1, and the bottom end of the connecting plate 1 is connected to a telescopic rod.

10. The scratch testing device for polymer materials according to claim 9, characterized in that: The bottom end of the telescopic rod is connected with a second connecting plate, one side of the second connecting plate is equidistantly provided with clamping blocks, and the inner side of the clamping blocks is provided with a permanent magnet.

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