Bearing device for dimensional stability test

Abstract

The utility model provides a bearing device for dimensional stability testing, and relates to the technical field of rigid foamed plastics, the bearing device comprises a bearing mechanism and a line drawing disc buckled on the bearing mechanism, the bearing mechanism comprises a net rack and a partition piece, the line drawing disc comprises an outer frame, a magnetic frame and a grid plate, and the magnetic frame and the grid plate are arranged in the outer frame; the plurality of partition pieces are uniformly arranged on the net rack, the sample fixing positions are formed between the adjacent partition pieces, and the samples are placed in the sample fixing positions, so that the plurality of samples are distributed at intervals in the testing process; a plurality of magnetic frames are uniformly arranged in an outer frame, a grid plate is arranged between every two adjacent magnetic frames, partition pieces are inserted into the magnetic frames, the magnetic frames and a net rack attract each other, the grid plate and the net rack clamp a sample located at a sample fixing position, the sample is fixed, lines can be drawn on the sample along the grid plate, the line drawing is simple, and the efficiency is high. Skew drawing can be effectively avoided, and the accuracy of a test result is ensured.

Description

Technical Field

[0001] This application relates to the technical field of rigid foam plastics, and particularly to a loading device for dimensional stability testing. Background Art

[0002] Rigid foam plastics are usually composed of a foaming agent and a plastic substrate, and are foamed and formed after high-temperature processing. The testing of dimensional stability is of great significance to rigid foam plastics, as it directly affects the functionality of the material and can determine the material's ability to maintain its shape and structural integrity under different temperature and humidity conditions.

[0003] The GB / T 8811-2008 standard stipulates that at least three specimens should be tested for each sample, with a spacing of at least 25 mm between specimens. By measuring the length, width at three different positions and the thickness at five different points of each specimen before and after the test, the dimensional change rate is calculated as the test result. In the actual operation of this testing method, it is necessary to repeat drawing lines for each sample, resulting in low detection efficiency. Moreover, affected by the operation level of the experimenter, it is easy to draw the lines crooked, generating errors and thus affecting the evaluation of the quality of rigid foam plastics. Summary of the Utility Model

[0004] The embodiments of this application provide a loading device for dimensional stability testing, which can ensure the spacing between multiple samples during the detection process and is also convenient for experimenters to draw lines. This application has the advantages of simple structure, improved work efficiency, and convenient operation for experimenters, solving the problems in multi-specimen experiments, such as difficulty in maintaining the spacing between specimens, time-consuming and laborious line-drawing operations, and easy crooked drawing.

[0005] The embodiments of this application provide a loading device for dimensional stability testing, including a loading mechanism and a line-drawing plate buckled on the loading mechanism;

[0006] The loading mechanism includes a grid frame and partition members. A plurality of the partition members are uniformly fixed on the upper part of the grid frame, and sample fixing positions are formed between adjacent partition members;

[0007] The line-drawing plate includes an outer frame, a magnetic frame and a grid plate arranged inside the outer frame. A plurality of the magnetic frames are evenly distributed inside the outer frame. The number of the plurality of magnetic frames is equal to the number of the plurality of partition members and their positions correspond one by one. The grid plates are arranged between adjacent magnetic frames, and the positions of the plurality of grid plates correspond one by one to the plurality of sample fixing positions;

[0008] A plurality of the partition members are respectively inserted into the corresponding magnetic frames. The magnetic frames and the grid frame attract each other, and the grid plates and the grid frame clamp the samples located at the sample fixing positions.

[0009] In a feasible implementation, side plate bodies are provided at both ends in the length direction of the grid frame. One end of the side plate body is connected to the grid frame, and the other end extends toward the side of the line-drawing disc.

[0010] A slot is formed between the magnetic frame and the outer frame, and the side plate body is inserted into the slot.

[0011] In a feasible implementation, stop bars are provided at both ends in the length direction of the grid frame. The two stop bars and the two side plate bodies form a loop-shaped frame.

[0012] In a feasible implementation, sliding grooves are oppositely provided on the two side plate bodies. The stop bars are inserted into the sliding grooves, and the outer walls on both sides of the stop bars are respectively slidably connected to the inner walls of the two sliding grooves.

[0013] In a feasible implementation, adjustment grooves are provided at the ends of the two side plate bodies, and the adjustment grooves communicate with the sliding grooves.

[0014] Screw holes are provided on both sides of the stop bar. An adjustment screw penetrates through the adjustment groove and is threadedly connected to the screw hole, and the end of the adjustment screw abuts against the inner wall of the sliding groove.

[0015] In a feasible implementation, the partition member includes a bottom plate and a wire mesh frame.

[0016] The wire mesh frame is fixedly arranged on the bottom plate, and the bottom plate is fixedly arranged on the grid frame.

[0017] In a feasible implementation, blind holes are provided on the bottom plate, through holes are provided on the grid frame, and fixing screws penetrate through the through holes and are threadedly connected to the blind holes.

[0018] In a feasible implementation, the end of the wire mesh frame away from the bottom plate is conical.

[0019] In a feasible implementation, a handle is provided at the side end of the grid frame.

[0020] A floor mat is provided at the bottom of the grid frame, and the four floor mats are respectively arranged at the four corners of the grid frame.

[0021] In a feasible implementation, ear plates are provided at both ends of the outer frame.

[0022] A loading device for dimensional stability testing provided by an embodiment of the present application evenly arranges a plurality of partition members on a grid frame. A sample fixing position is formed between adjacent partition members, and a sample is placed in the sample fixing position, so as to ensure that multiple samples are spaced apart during the testing process. By evenly arranging a plurality of magnetic frames in an outer frame and arranging a grid plate between adjacent magnetic frames, the partition members are inserted into the magnetic frames, and the magnetic frames and the grid frame attract each other, so that the grid plate and the grid frame clamp the sample located in the sample fixing position to fix the sample. Moreover, lines can be drawn on the sample along the grid plate. The line drawing is simple, and the situation of drawing crooked can be effectively avoided, ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a loading device for dimensional stability testing provided by the present application;

[0024] Figure 2 is a schematic structural diagram of a loading mechanism;

[0025] Figure 3 is a sectional view of the loading mechanism;

[0026] Figure 4 is a schematic structural diagram of a line drawing plate.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS:

[0028] 1 - loading mechanism; 2 - line drawing plate;

[0029] 11 - grid frame; 12 - partition member; 13 - side plate body; 14 - retaining rod; 15 - sliding groove; 16 - adjusting groove; 17 - handle; 18 - floor mat; 19 - adjusting screw; 21 - outer frame; 22 - magnetic frame; 23 - grid plate; 24 - slot; 25 - ear plate;

[0030] 121 - bottom plate; 122 - wire grid frame; 123 - fixing screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] Rigid foam plastics are a type of foam plastics with a closed-cell structure, usually having a relatively high density and strength. It has a variety of excellent properties, such as good heat insulation, sound insulation, water resistance, dimensional stability, etc. Therefore, it has a wide range of applications in the fields of construction, transportation, packaging, refrigeration equipment, etc. Common rigid foam plastics include polyurethane foam plastics, polystyrene foam plastics, phenolic foam plastics, etc.

[0033] The dimensional stability test of rigid foam plastics mainly serves to ensure product quality, optimize product design, meet application requirements, and evaluate material properties. In the actual operation process of current test methods, it is necessary to repeat drawing lines for each sample, resulting in low detection efficiency. Moreover, affected by the operation level of experimental personnel, it is easy to draw the lines crooked, generating errors, which in turn affects the evaluation of the quality of rigid foam plastics.

[0034] The loading device provided in this application for dimensional stability testing has a drawing tray buckled on the upper part of the loading mechanism. The grid plate and the grid frame clamp the sample at the sample fixing position to fix the sample. Drawing lines along the grid plate is simple, which can effectively avoid drawing the lines crooked and ensure the accuracy of the test results.

[0035] The following will describe in detail the specific structure of the loading device provided in this application for dimensional stability testing with reference to the accompanying drawings.

[0036] Refer to Figures 1 - 4 As shown, the embodiment of this application provides a loading device for dimensional stability testing, which includes a loading mechanism 1 and a drawing tray 2 buckled on the loading mechanism 1. The drawing tray 2 and the loading mechanism 1 clamp multiple samples;

[0037] As Figures 1 - 3 shown, the loading mechanism 1 includes a grid frame 11 and partition members 12. The grid frame 11 can be a rectangular plate or a rectangular mesh plate, and the partition members 12 can be rectangular. A plurality of partition members 12 are uniformly fixed on the upper part of the grid frame 11, and sample fixing positions are formed between adjacent partition members 12;

[0038] As Figure 2 shown, since the GB / T 8811-2008 standard stipulates that at least three specimens should be tested for each sample, preferably, four partition members 12 are provided on the grid frame 11. The four partition members 12 form three sample fixing positions, and the three sample fixing positions are used to fix three specimens of the same sample; Of course, four partition members 12 can also be set to seven, and the seven partition members 12 form six sample fixing positions, and the six sample fixing positions fix six specimens of two samples;

[0039] As Figure 1 and Figure 4As shown in the figure, the drawing plate 2 includes an outer frame 21, a magnetic frame 22 and a grid plate 23 disposed within the outer frame 21. The outer frame 21 can be a rectangular frame, and the magnetic frame 22 can be a square frame made of magnets. The inner wall size of the square frame is in clearance fit with the outer wall size of the partition member 12. A plurality of magnetic frames 22 are evenly distributed within the outer frame 21. The number of the plurality of magnetic frames 22 is equal to the number of the plurality of partition members 12, and their positions correspond one by one. A grid plate 23 is provided between adjacent magnetic frames 22. The grid plate 23 can be a rectangular or square grid plate. The positions of the plurality of grid plates 23 correspond one by one to the plurality of sample fixing positions.

[0040] In one embodiment, the upper surface of the sample can be a 100mm×100mm square. The grid plate 23 is composed of five transverse slats and five longitudinal slats. By drawing lines along the five transverse slats, five transverse lines are obtained. The intervals between the five transverse lines are 10mm, 40mm, 40mm, and 10mm in sequence. Similarly, by drawing lines along the five longitudinal slats, five longitudinal lines are obtained. The intervals between the five longitudinal lines are 10mm, 40mm, 40mm, and 10mm in sequence.

[0041] The plurality of partition members 12 are respectively inserted into the corresponding magnetic frames 22. The magnetic frames 22 and the grid frame 11 attract each other, and the grid plate 23 and the grid frame 11 clamp the sample located at the sample fixing position.

[0042] A loading device for dimensional stability testing provided by an embodiment of the present application, by uniformly arranging a plurality of partition members 12 on the grid frame 11, sample fixing positions are formed between adjacent partition members 12, and samples are placed in the sample fixing positions, thereby ensuring that multiple samples are spaced apart during the testing process; by uniformly arranging a plurality of magnetic frames 22 within the outer frame 21 and arranging a grid plate 23 between adjacent magnetic frames 22, the partition members 12 are inserted into the magnetic frames 22, and the magnetic frames 22 and the grid frame 11 attract each other, so that the grid plate 23 and the grid frame 11 clamp the sample located at the sample fixing position to fix the sample. Moreover, lines can be drawn on the sample along the grid plate 23. The drawing is simple, effectively avoiding drawing crooked and ensuring the accuracy of the test results.

[0043] Refer to Figures 1 - 4 As shown in the figure, in some embodiments, side plate bodies 13 are provided at both ends in the length direction of the grid frame 11. The side plate bodies 13 are vertically arranged rectangular plate bodies or U-shaped frame bodies or arched frame bodies. One end of the side plate body 13 is connected to the grid frame 11, and the other end extends towards the drawing plate 2 side;

[0044] The magnetic frame 22 is a rectangular frame. Slots 24 are formed between the outer frame 21 at the end in the length direction and the magnetic frame 22. The two slots 24 correspond to the two side plate bodies 13;

[0045] The side plate body 13 is plugged into the slot 24 , so that the supporting mechanism 1 and the drawing disk 2 are stably connected.

[0046] Reference Figure 2 and Figure 3 As shown, in some embodiments, both ends of the grid 11 in the length direction are provided with blocking rods 14, the blocking rods 14 can be square rods, the blocking rods 14 are arranged horizontally, and the two blocking rods 14 and the two side plates 13 form a circular frame;

[0047] The blocking rod 14 is engaged with the sample to disengage the sample from the sample fixing position.

[0048] In some embodiments, the front and rear sides of the opposite surfaces of the two side plates 13 are provided with slide grooves 15, and the slide grooves 15 penetrate the side plates 13. The two slide grooves 15 at the front of the two side plates 13 correspond to each other, and the blocking rod 14 at the front is inserted into the two slide grooves 15 at the front. The two slide grooves 15 at the rear of the two side plates 13 correspond to each other, and the blocking rod 14 at the rear is inserted into the two slide grooves 15 at the rear.

[0049] The blocking rod 14 and the slide groove 15 are interference fit, so that the blocking rod 14 can be fixed at any position of the slide groove 15 under the action of static friction, so that the height of the blocking rod 14 can be freely adjusted to fit different samples.

[0050] In some embodiments, the front and rear ends of the two side plates 13 are both provided with adjustment slots 16, and the adjustment slots 16 are connected to the slide slots 15;

[0051] Screw holes are provided on both sides of the length direction of the blocking rod 14, and the adjusting screw 19 passes through the adjusting slot 16 and is screwed to the screw hole;

[0052] When the adjusting screw 19 is rotated clockwise, the adjusting screw 19 gradually disengages from the screw hole of the blocking rod 14, and the adjusting screw 19 does not contact the inner wall of the slide groove 15, so that the blocking rod 14 can move freely up and down; when the adjusting screw 19 is rotated counterclockwise, the adjusting screw 19 gradually penetrates into the screw hole, and the end of the adjusting screw 19 abuts against the inner wall of the slide groove 15, and the adjusting screw 19 squeezes the inner wall of the slide groove 15, and there is a great static friction between the two, so that the adjusting screw 19 and the blocking rod 14 are fixed at the current position of the slide groove 15, so that the position of the blocking rod 14 is locked.

[0053] Reference Figure 3 As shown, in some embodiments, the partition member 12 includes a bottom plate 121 and a wire mesh frame 122;

[0054] The bottom plate 121 may be a rectangular plate, and the length thereof is smaller than the width of the grid frame 11. The wire grid frame 122 is a rectangular parallelepiped formed by bending steel wires. The wire grid frame 122 is fixedly mounted on the bottom plate 121, and the bottom plate 121 is fixedly mounted on the grid frame 11.

[0055] The wire mesh frame 122 made of bent wires is conducive to heat transfer, ensuring uniform heating of the sample, and thus improving the accuracy of test results.

[0056] In some embodiments, a plurality of blind holes are provided on the lower surface of the bottom plate 121, and a plurality of through holes are provided on the mesh frame 11. The plurality of through holes correspond to the plurality of blind holes one by one. The fixing screws 123 pass through the through holes and are screwed into the blind holes, so that the partition member 12 is fixed on the mesh frame 11.

[0057] In some embodiments, the end of the wire mesh frame 122 away from the bottom plate 121 is tapered, so as to facilitate the insertion of the wire mesh frame 122 into the magnetic frame 22.

[0058] Refer to Figure 1 and Figure 2 As shown in, in some embodiments, a handle 17 is provided at the side end of the mesh frame 11. The handle 17 is a wooden handle, which protects the experimenter from taking out the loading device from a high-temperature environment;

[0059] A floor mat 18 is provided at the bottom of the mesh frame 11. The four floor mats 18 are respectively arranged at the four corners of the mesh frame 11, so as to facilitate the stable fixation of the device in a high-temperature environment during testing.

[0060] Refer to Figure 1 As shown in, in some embodiments, ear plates 25 are provided at both ends of the outer frame 21. The ear plates 25 are wooden plates, so as to facilitate the separation of the drawing plate 2 from the loading mechanism 1.

[0061] According to the above technical features, the working principle of the loading device for dimensional stability testing provided by the present application in the actual application scenario is as follows:

[0062] Fix the four partition members 12 on the mesh frame 11 to form three sample fixing positions. Place the three specimens of the sample into the three sample fixing positions respectively. Adjust the position of the stop rod 14 according to the thickness of the specimen, so that the stop rod 14 is located in the middle of the upper part or the top to limit the sample;

[0063] Fasten the drawing plate 2, so that the plurality of partition members 12 are respectively inserted into the corresponding magnetic frames 22, and the side plate body 13 is inserted into the slot 24. At the same time, the magnetic frame 22 and the mesh frame 11 attract each other, and the grid plate 23 and the mesh frame 11 clamp the sample specimen located in the sample fixing position to fix the sample specimen;

[0064] Use a pen to draw lines on the sample specimen along the grid plate 23. After drawing the lines, put the device into an environmental chamber such as an oven and heat it in a specific high-temperature environment for a certain period of time. After the test is completed, take out the sample and measure the scribed dimensions again, so as to calculate the dimensional stability of the sample.

[0065] The loading device for dimensional stability testing provided by this application has the advantages of simple structure, improved work efficiency, and convenient operation for experimenters. By evenly arranging a plurality of partition members 12 on the grid frame 11, sample fixing positions are formed between adjacent partition members 12, and samples are placed in the sample fixing positions, thus ensuring that multiple samples are spaced apart during the testing process; by evenly arranging a plurality of magnetic frames 22 in the outer frame 21, a grid plate 23 is arranged between adjacent magnetic frames 22, enabling the partition members 12 to be inserted into the magnetic frames 22, and the magnetic frames 22 and the grid frame 11 attract each other, so that the grid plate 23 and the grid frame 11 clamp the samples located in the sample fixing positions to fix the samples. Moreover, lines can be drawn on the samples along the grid plate 23, the line drawing is simple, and it can effectively avoid drawing crooked, ensuring the accuracy of the test results.

[0066] It is easy to understand that those skilled in the art can combine, split, and reorganize the embodiments of this application based on several embodiments provided by this application to obtain other embodiments, and these embodiments do not exceed the protection scope of this application.

[0067] The above specific implementation manners further elaborate on the purpose, technical solutions, and beneficial effects of the embodiments of this application. It should be understood that the above are only the specific implementation manners of the embodiments of this application and are not used to limit the protection scope of the embodiments of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of this application shall be included in the protection scope of the embodiments of this application.

Claims

1. A loading device for dimensional stability testing, characterized in that: It includes a bearing mechanism (1) and a drawing disk (2) fastened to the bearing mechanism (1). The bearing mechanism (1) includes a wire frame (11) and partition members (12). A plurality of the partition members (12) are uniformly fixed on the upper part of the wire frame (11), and sample fixing positions are formed between adjacent partition members (12). The drawing disk (2) includes an outer frame (21), a magnetic frame (22) and a grid plate (23) arranged in the outer frame (21). A plurality of the magnetic frames (22) are uniformly distributed in the outer frame (21). The number of the plurality of magnetic frames (22) is equal to that of the plurality of partition members (12), and their positions correspond one by one. The grid plate (23) is arranged between adjacent magnetic frames (22), and the positions of the plurality of grid plates (23) correspond one by one to the plurality of sample fixing positions. A plurality of the partition members (12) are respectively inserted into the corresponding magnetic frames (22). The magnetic frame (22) and the wire frame (11) attract each other, and the grid plate (23) and the wire frame (11) clamp the sample located at the sample fixing position.

2. The bearing device for dimensional stability test according to claim 1, wherein: Side plate bodies (13) are provided at both ends in the length direction of the wire frame (11). One end of the side plate body (13) is connected to the wire frame (11), and the other end extends towards the side of the drawing disk (2). A slot (24) is formed between the magnetic frame (22) and the outer frame (21), and the side plate body (13) is inserted into the slot (24).

3. The bearing device for dimensional stability test according to claim 2, wherein: Blocking rods (14) are provided at both ends in the length direction of the wire frame (11). The two blocking rods (14) and the two side plate bodies (13) form a loop-shaped frame.

4. The bearing device for dimensional stability test according to claim 3, wherein: Chute grooves (15) are oppositely provided on the two side plate bodies (13). The blocking rods (14) are inserted into the chute grooves (15), and the outer walls on both sides of the blocking rods (14) are respectively in sliding connection with the inner walls of the two chute grooves (15).

5. The bearing device for dimensional stability test according to claim 4, wherein: Adjusting grooves (16) are provided at the ends of the two side plate bodies (13), and the adjusting grooves (16) communicate with the chute grooves (15). Screw holes are provided on both sides of the blocking rod (14). An adjusting screw (19) passes through the adjusting groove (16) and is screwed with the screw hole, and the end of the adjusting screw (19) abuts against the inner wall of the chute groove (15).

6. The bearing device for dimensional stability test according to claim 1, wherein: The partition member (12) includes a bottom plate (121) and a wire mesh frame (122). The wire mesh frame (122) is fixed on the bottom plate (121), and the bottom plate (121) is fixed on the wire frame (11).

7. The load-bearing device for dimensional stability testing according to claim 6, wherein: Blind holes are provided on the bottom plate (121), through holes are provided on the wire frame (11), and fixing screws (123) penetrate through the through holes and are screwed with the blind holes.

8. The load-bearing device for dimensional stability testing according to claim 6, wherein: The end of the wire mesh frame (122) away from the bottom plate (121) is conical.

9. The load-bearing device for dimensional stability testing according to claim 1, wherein: A handle (17) is provided at the side end of the wire frame (11); A floor mat (18) is provided at the bottom of the wire frame (11), and the four floor mats (18) are respectively arranged at the four corners of the wire frame (11).

10. The load-bearing device for dimensional stability testing according to claim 1, wherein: Ear plates (25) are provided at both ends of the outer frame (21).

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