A device for testing the adhesiveness of sealant

Abstract

The utility model discloses a sealant adhesiveness testing device in the technical field of sealant peeling testing, comprising a tensile testing device and a positioning device; the tensile testing device comprises a workbench, a clamp and a support frame, the sealant sample is clamped and pulled by the tensile testing device, and the positioning device comprises an adjusting pressing plate, a clamping bottom plate and a detection turntable, the upper and lower ends of a profile are clamped by the positioning device, the tested profile can be clamped from the side by optimizing the clamping structure of the profile, more profiles of different models and shapes can be clamped vertically, and the versatility is stronger; the clamp is not positioned for the profile, but takes the peeling surface of the profile and the sealant sample as the center, the whole profile can also rotate to cooperate with the pulling direction of the clamp when pulling, so that the tensile force applied upward by the clamp and the peeling surface of the sealant sample and the profile can be rotated to the same vertical plane when the force is applied and pulled, and the test data is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of sealant peeling test, in particular to a sealant adhesion test device. Background Art

[0002] Sealant is an elastic sealing material used for filling and bonding joints and solidified at room temperature. Sealant for construction has been rapidly developed in my country because of its stable performance at high temperatures, flexibility and elasticity at low temperatures, weather aging resistance, water resistance, and excellent adhesion to glass. It is widely used in the decoration, waterproofing, panel installation and structural bonding of building exterior enclosures such as building doors, windows and curtain walls. Its main functions include sealing, waterproofing, dustproofing, shock absorption, sound insulation, structural bonding and other aspects.

[0003] According to the current relevant specifications, the sealants used in curtain wall, door and window projects must be subjected to peeling adhesion tests before construction, and can only be used in construction after the test results are qualified. The detection method of the peeling adhesion test needs to be tested in accordance with national standards, and needs to be carried out in accordance with the "Test method for adhesion between substrates and sealants for actual projects" in "Silicone structural sealants for construction" GB 16776-2005. The specific operation process recorded therein is: apply sealant on the substrate, make a test piece and perform curing, load the cured test piece into the tensile testing machine, pull the sealant sample in the 180° direction at a speed of 50mm / min, the peeling time is about 1min, and record the test tension and various data.

[0004] There are many types of profiles used in construction. The degree of sealant adhesion is different on different profiles, and the degree of sealant adhesion is also different for profiles of the same model with different surface treatments. In order to ensure the safety of the use of sealants, each profile needs to be tested before being used with sealants to ensure the accuracy of the test. The shapes of profiles vary, some are square tubes, some are L-shaped tubes, some are long rods, and some are square frames, but they all need to be stably clamped. There is currently no universal positioning device that can be applied to all profiles. The current profile clamping method is also to clamp the bottom of the profile, and then clamp the cured sealant sample with the upper clamp of the tensile tester, and then apply force for tensile testing. The cured sealant sample is attached to the outer surface of the profile, and the clamp for clamping the profile is to clamp the center of the profile. The clamp at the upper end of the tensile tester is to clamp the sealant sample, which makes the direction of the tension easy to tilt.

[0005] Based on this, the utility model designs a test device for the adhesiveness of sealant to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a test device for the adhesion of sealants, which can clamp the tested profile from the side by optimizing the clamping structure of the profile, and can vertically clamp more profiles of different models and shapes, so that it is more versatile; and the clamp is not positioned according to the profile, but takes the peeling surface of the profile and the sealant sample as the center, and the entire detection turntable rotates accordingly, so that the profile clamped thereon can also rotate in coordination with the pulling direction of the clamp when it is pulled, so that the pulling force applied upward by the clamp and the peeling surface of the sealant sample and the profile rotate to the same vertical plane when the force is applied and pulled, the pulling direction is closer to 180°, the force direction is more accurate, and the test data is more accurate.

[0007] The utility model is implemented as follows: a sealant adhesiveness testing device, comprising:

[0008] Tensile testing device and positioning device;

[0009] The tensile testing device comprises a workbench, a fixture and a support frame, wherein the workbench is a horizontal stable platform, the support frame is fixedly mounted on the workbench, the fixture is stably mounted on the support frame, and the fixture can be vertically lifted and lowered by the support frame and is arranged directly above the workbench;

[0010] The positioning device includes an adjusting pressing plate, a clamping bottom plate and a detection turntable;

[0011] The detection turntable is a rotating platform;

[0012] The clamping bottom plate is a flat plate, and the clamping bottom plate is horizontally mounted above the workbench through the detection turntable so as to be relatively rotatable; the clamping bottom plate rotates horizontally along the vertical axis;

[0013] A vertical plate is vertically arranged on the top of the clamping bottom plate, and a positioning frame is horizontally arranged on the top of the vertical plate. One clamping bottom plate, two vertical plates and one positioning frame form a square frame with a hollow interior; a positioning point is arranged on the clamping bottom plate, and the positioning point is directly below the clamp;

[0014] The adjusting plate is a flat plate, and the adjusting plate can be lifted and lowered horizontally and is directly under the positioning frame; the adjusting plate does not block the path between the positioning point and the fixture;

[0015] The positioning point, the fixture axis and the rotation axis of the detection turntable coincide with each other.

[0016] The beneficial effects of the utility model are as follows: 1. The utility model forms a vertical frame structure through a vertical plate, a positioning frame plate and a clamping bottom plate, and an adjusting pressing plate is placed horizontally in the frame. The profile to be tested is clamped in the up and down direction by the adjusting pressing plate, and it is no longer clamped only at the bottom of the profile, but at the side of the profile, so that the clamping mode of the device is not limited by the shape of the profile, and the adjusting pressing plate can still be lifted up and down for clamping. Therefore, the device does not need to accurately limit the length of the profile to be tested, but only needs to limit the approximate range, and has stronger versatility, and can stably clamp and position various profiles;

[0017] 2. The device clamps on the outside up and down, not to locate the center point of the profile, but to locate and expose the peeling surface of the profile and the sealant sample, and the peeling surface can be placed directly below the fixture, so as to achieve the operation of applying force in the opposite direction on the same plane in the true peeling direction, and the force direction is more accurate, and the test data is more accurate;

[0018] 3. This device is equipped with a detection turntable, which can rotate the peeling surface by rotating the detection turntable. The tension applied by the fixture can rotate and change the angle of the sealant sample on the peeling surface, so that the peeling surface can be rotated to the same plane with the tension of the fixture. The orientation and direction of the tension can rotate automatically according to the change of torque. The direction of the tension test is more accurate, which effectively reduces the angle deviation error during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the clamping state of the profile of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the clamping bottom plate and the adjusting pressing plate of the utility model in an empty state;

[0023] Figure 4 This is a schematic diagram of the top view of the position relationship structure of the positioning frame of the utility model;

[0024] Figure 5 It is a front structural schematic diagram of the utility model when the profile is clamped.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-working table, 11-fixture, 12-support frame, 2-adjusting pressure plate, 21-positioning frame plate, 22-adjusting bolt, 3-clamping base plate, 31-positioning point, 32-vertical plate, 4-detection turntable, 41-positioning table, 5-profile, 51-sealant sample. DETAILED DESCRIPTION

[0027] See also Figures 1 to 5 As shown, the utility model provides a device for testing the adhesion of sealants. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings in the specification and specific implementation methods.

[0028] In a specific embodiment of the technical solution of the utility model:

[0029] It includes a tensile testing device and a positioning device;

[0030] The tensile testing device includes a workbench 1, a fixture 11 and a support frame 12. The workbench 1 is a horizontal and stable platform. The support frame 12 is fixedly mounted on the workbench 1. The fixture 11 is stably mounted on the support frame 12. The fixture 11 can be vertically lifted and lowered through the support frame 12 and is arranged directly above the workbench 1. The above structure is the structure of a commonly used tensile tester, and the force application method is also the same. This device uses the precision tensile instrument and controller of a conventional tensile tester and only changes the bottom structure of the tensile tester, but it is necessary to make limitations and requirements on the workbench 1 and the fixture 11 of the tensile tester to cooperate with the detection setting of this device.

[0031] The positioning device includes an adjusting pressing plate 2, a clamping base plate 3 and a detection turntable 4;

[0032] The detection turntable 4 is a rotating platform; a positioning platform 41 is set at the bottom of the detection turntable 4 so that it can rotate relatively, the positioning platform 41 is a flat plate, the bottom of the positioning platform 41 is fixed on the top of the workbench 1, and the top of the detection turntable 4 is fixed on the bottom of the clamping base plate 3; the detection turntable 4 is mounted on the top of the positioning platform 41 so that it can rotate horizontally along the vertical axis.

[0033] The positioning table 4 and the detection turntable 4 form a complete mechanical turntable, which can be a universal turntable, a vertical and horizontal turntable, or a flat turntable. As long as the detection turntable 4 can be axially rotated on the positioning table 4 with a vertical axis on the same horizontal plane, the vertical axis of rotation needs to coincide with the vertical center line of the fixture 11, that is, the vertical axes of the positioning table 4, the detection turntable 4, the centering point 31 and the fixture 11 coincide.

[0034] The rotation of the detection turntable 4 drives the rotation of the clamping base plate 3, so that the profile 5 clamped by the entire adjustment plate 2 can rotate accordingly. This rotatable detection turntable 4 allows the profile to be firmly clamped, but the clamping base plate 3 can rotate accordingly following the change in the direction of the tension of the clamp 11, so that when the clamp 11 applies tension, the peeling surface of the profile and the sealant sample 51 can rotate accordingly following the change in the direction of the tension, until the tension applied by the clamp 11 and the adhesive force direction of the peeling surface of the sealant sample 51 are opposite on the same plane. Only then can it be ensured that the tension of the clamp 11 and the adhesive force of the sealant sample 51 are stably balanced, and the force directions are opposite in the same plane, so that the device can self-calibrate the force direction of the peeling surface to ensure that the tension test direction meets the specified 180° reverse pull.

[0035] The sealant sample 51 is obtained by cutting the sealant on the profile 5 and peeling off the peeled portion to form a complete sheet of sealant, which is used to cooperate with the clamp 11 to clamp and pull the sealant sample 51 to completely peel it off the profile 5.

[0036] The clamping bottom plate 3 is a flat plate, and the clamping bottom plate 3 is horizontally mounted above the workbench 1 so as to be relatively rotatable through the detection turntable 4; the clamping bottom plate 3 rotates horizontally along the vertical axis;

[0037] A vertical plate 32 is vertically arranged on the top of the clamping bottom plate 3, and a positioning frame plate 21 is horizontally arranged on the top of the vertical plate 32. A clamping bottom plate 3, two vertical plates 32 and a positioning frame plate 21 form a square frame with a hollow interior; a positioning point 31 is arranged on the clamping bottom plate 3, and the positioning point 31 is directly below the clamp 11; the positioning frame plate 21 is a horizontally arranged flat plate, and four through holes 23 are arranged on the positioning frame plate 21. The four through holes 23 are rectangularly distributed at the four corners of the positioning frame plate 21, and each through hole penetrates the upper and lower sides of the positioning frame plate 21, and an adjusting bolt 22 is vertically inserted into each through hole 23.

[0038] The upper end of the adjusting bolt 22 can be horizontally rotated and clamped above the positioning frame plate 21, and the lower end of the adjusting bolt 22 extends vertically below the positioning frame plate 21. The adjusting pressure plate 2 is connected to the lower end of the adjusting bolt 22 through a threaded connection, and the adjusting pressure plate 2 can be lifted and hung directly below the positioning frame plate 21 through the adjusting bolt 22.

[0039] The adjusting platen 2 is a flat plate, and the adjusting platen 2 is hoisted horizontally just below the positioning frame 21 so as to be able to be raised and lowered; one end of the adjusting bolt 22 is a screw rod, and the other end is a hexagonal screw head; vertical through holes are provided at four corners of the positioning frame 21 in a rectangular array, and the through holes vertically penetrate the positioning frame 21, and an adjusting bolt 22 is vertically inserted into each through hole provided on the positioning frame 21;

[0040] The adjusting bolt 22 is suspended on the top of the positioning frame plate 21 by a larger nail head, and because the nail head of the adjusting bolt 22 is larger, it cannot pass through the through hole of the positioning frame plate 21 and fall downward, so that the adjusting bolt 22 can be stably suspended, and the adjusting bolt 22 can rotate horizontally on the positioning frame plate 21. For the convenience of rotation, a bearing can also be set between the adjusting bolt 22 and the through hole of the positioning frame plate 21, but the nail head diameter of the adjusting bolt 22 must always be kept larger than the aperture of the through hole of the positioning frame plate 21 to ensure that the adjusting bolt 22 cannot fall downward.

[0041] A spring is also provided between the positioning frame plate 21 and the adjusting pressure plate 2, and the spring can be mounted on the outside of the adjusting bolt 22, so that the pressing force of the positioning frame plate 21 is more balanced, and the tested profile itself has a certain elasticity. If there is no spring, the positioning frame plate 21 and the adjusting pressure plate 2 will rigidly clamp the profile, which may easily deform the profile. The device adds a spring to make the positioning frame plate 21 and the adjusting pressure plate 2 have a certain elasticity when connected, so as to elastically clamp the profile, which can keep the downward pressure of the adjusting pressure plate 2 in contact with the top of the profile and evenly bear the force, and can also avoid the deformation of the profile caused by excessive pressure. The positioning frame plate 21 and the adjusting pressure plate 2 of the device only need to clamp the profile.

[0042] The adjusting plate 2 does not block the path between the positioning point 31 and the clamp 11; the adjusting plate 2 is prevented from interfering with the tension of the clamp 11, ensuring that the tension is not interfered by external forces when applied, and can also expose the bonding side of the profile 5 and the sealant sample 51 at the positioning point 31, ensuring that the tension of the clamp 11 and the bonding force direction of the sealant sample 51 are in the same vertical plane. When the sealant sample 51 of the device is pulled, there is no inclination angle, ensuring that the tension direction is more accurate, the torque obtained by the test has no inclination angle, the tension size is also more accurate, and the tension deflection error is effectively reduced.

[0043] The adjusting plate 2 and the clamping bottom plate 3 can be loosely clamped on the upper and lower ends of the profile 5 to be tested;

[0044] To ensure that 51 can be pulled along the edge of the adjusting platen 2, the vertical inner wall of the adjusting platen 2 should avoid the axis of the positioning point 31, that is, the vertical inner wall of the adjusting platen 2 should be closer to the outside. In order to stabilize the clamping of the profile 5, the distance d between the adjusting platen 2 and the center of the positioning point 31 can be translated outward by about 0.5-1cm; the adjusting platen 2 does not block the path between the positioning point 31 and the fixture 11; ensure that the clamp 11 and the sealant sample 51 will not be blocked or interfered by the adjusting platen 2 during the tensile test. The positioning point 31, the axis of the fixture 11 and the rotation axis of the detection turntable 4 coincide, that is, the vertical rotation axis of the detection turntable 4. The lifting and lowering pulling direction of the fixture 11 and the positioning point 31 need to be on the same vertical line.

[0045] It should be noted that:

[0046] 1. The commonly used tensile testers are all fixed style, with a clamp at the upper end and a clamp at the lower end. The pulling directions of the upper and lower clamps are indeed coaxial in the vertical direction, but the sealant sample 51 cured and formed on the tested profile 5 is adhered to one side, and the lower end of the profile 5 is clamped on the horizontal plane. The clamping method is as follows: Figure 1 The clamping method of the upper clamp 11 is the same, that is, the upper and lower ends are clamped, and the upper clamp 11 clamps the sealant sample 51, which makes the sealant sample 51 not on the same vertical axis as the clamp at the lower end when clamped, and needs to be adjusted, either to adjust the position of the clamp or to adjust the angle at which the profile 5 is clamped. At present, for the convenience of use, the use method of the existing tensile tester is generally not changed, which requires changing the clamping angle of the profile 5 so that the sealant sample 51 is vertically upward, which actually makes the tensile force of the peeling test relatively skewed, and the tensile test Deviation occurs. The deviation force is not only the deflection angle of the profile, but also the angle direction between the sealant sample 51 and the profile when it is pulled. This error is a double moment deviation, and the error is relatively large. In addition, the direction of the profile 5 is not changed, and it is clamped directly. Instead, the sealant sample 51 is peeled off on one side and bent. It seems that the sealant sample 51 is pulled vertically, and the profile 5 is also clamped vertically. However, the pulling force of the clamp 11 needs to pass through the side of the profile 5 to wrap around and form resistance. In addition, the sealant sample 51 is first bent outward, then bent inward to return to the center, and then pulled again, resulting in an error.

[0047] 2. The current clamps have different shapes. The cross-sections of the profile 5 are H-shaped, L-shaped, square tube-shaped, round tube-shaped, and straight plate-shaped. Conventional clamps can only clamp one end of the profile 5, which is also a conventional clamping method, that is, clamping one end of the profile 1 with great force, limiting the rotation and movement of the profile 5 by friction and a limit device, and only clamping one end. The device clamps a profile 5 at both ends by adjusting the pressure plate 2 to clamp the upper end and the clamping bottom plate 3 to clamp the lower end. The clamping force is separated from the tension of the clamp 11 and is implemented separately, so that the clamping force and the tension do not affect each other, and the tension direction of the peeling test is accurate. Moreover, the detection turntable 4 can rotate when the force is pulled, so that the peeling surface rotates to the same vertical plane as the clamp 11, and the tension direction is closer to 180°. The error is close to a negligible level, which is not in the same order of magnitude as the error of the existing device, greatly improving the detection accuracy and providing more accurate and effective data for safety testing.

[0048] 3. At present, the clamping is performed from the bottom to clamp one end of the profile 5, so that the profile can only be clamped by the clamping fixture suitable for the profile 5, or the clamping part of the profile 5 is changed according to the different shapes of the profile 5 to be tested, which further forces the clamping angle and orientation of the profile 5 to be changed, which will affect the test tension angle and increase the test error, or the clamping head is replaced to clamp different profiles 5, but many profiles 5 have special shapes and various shapes, and it is difficult to have so many matching clamping fixtures to adapt and clamp them.

[0049] The device clamps up and down without a separate clamp and does not need to be adapted to clamps of various shapes. The clamping can be completed by clamping the two ends together, so that the shape and length of the clamped profile 5 are not limited and the application range is wide. In addition, the downward pressure of the adjusting pressure plate 2 is used to resist the pulling force of the clamp 11, and friction is no longer relied on, which effectively avoids the rotation displacement of the profile 5 caused by insufficient friction, and also avoids the deformation of the profile 5 caused by a larger clamping force and the occurrence of accidents.

[0050] When the utility model is used, it is completed by a specific tensile test method, which includes the following steps:

[0051] Step 1, take the profile 5 to be tested, and grind the upper and lower ends of the profile 5 to be tested flat, ensure that the end surface is flat, and use a blade to cut and peel off a section of the sealant sample 51 on the profile 5 to be tested, so that one end of the sealant sample 51 is tightly connected to the profile 5, and the other end of the sealant sample 51 is separated from the profile 5 and opened, and ensure that the sealant sample 51 is intact and not broken;

[0052] Step 2, adjust the height position of the adjusting plate 2 so that the height difference between the adjusting plate 2 and the profile 5 is greater than the height of the profile 5 to be tested, and place the profile 5 to be tested upright on the top of the clamping bottom plate 3, and place the sealant sample 51 at one end of the profile 5 peeled off downward, and make the peeling surface of the profile 5 and the sealant sample 51 coincide with the axis of the positioning point 31;

[0053] Step 3, lower the height of the adjusting platen 2, and stably clamp the upper and lower ends of the profile 5 by adjusting the platen 2 and the clamping bottom plate 3;

[0054] Step 4, the sealant sample 51 is then flipped up, and the flipped sealant sample 51 is stably clamped by the clamp 11, and the clamp 11 is started to be lifted by the tensile testing device, and the sealant sample 51 is pulled by the clamp 11;

[0055] Step 5, the rotating detection turntable 4 can rotate in a horizontal circle on the top of the positioning platform 41. When the pulling force of the clamp 11 and the peeling surface of the profile 5 and the sealant sample 51 do not coincide, the detection turntable 4 will rotate under the pulling force of the clamp 11 until the pulling force coincides. At this time, the peeling surface of the profile 5 and the sealant sample 51 coincides with the clamping surface of the clamp 11;

[0056] Step 6, continue to apply force to the fixture 11 until the sealant sample 51 is completely separated from the profile 5, record the tensile force, and complete the test.

[0057] The positioning point 31 is the inner side, and the adjusting plate 2 and the clamping base plate 3 rotate around the detection turntable 4. The rotation axis of the detection turntable 4 is also the positioning point 31, so the outer side of the rotation track of the clamping base plate 3 is the outer side. The orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0058] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A sealant adhesiveness testing device, characterized in that: include: Tensile testing device and positioning device; The tensile testing device comprises a workbench (1), a fixture (11) and a support frame (12); the workbench (1) is a horizontal stable platform; the support frame (12) is fixedly mounted on the workbench (1); the fixture (11) is stably mounted on the support frame (12); and the fixture (11) is arranged directly above the workbench (1) so as to be vertically raised and lowered by the support frame (12); The positioning device comprises an adjusting pressing plate (2), a clamping base plate (3) and a detection turntable (4); The detection turntable (4) is a rotating platform; The clamping base plate (3) is a flat plate, and the clamping base plate (3) is horizontally mounted directly above the workbench (1) so as to be relatively rotatable via the detection turntable (4); the clamping base plate (3) is horizontally rotated along a vertical axis; A vertical plate (32) is vertically arranged on the top of the clamping bottom plate (3), and a positioning frame plate (21) is horizontally arranged on the top of the vertical plate (32); the clamping bottom plate (3), two vertical plates (32) and one positioning frame plate (21) form a square frame with a hollow interior; a positioning point (31) is arranged on the clamping bottom plate (3), and the positioning point (31) is located directly below the clamp (11); The adjusting pressure plate (2) is a flat plate, and the adjusting pressure plate (2) is hoisted horizontally just below the positioning frame plate (21) in a manner that allows it to be raised or lowered; The adjusting pressing plate (2) does not block the path between the positioning point (31) and the clamp (11); The positioning point (31), the axis of the fixture (11) and the rotation axis of the detection turntable (4) coincide with each other.

2. A sealant adhesiveness testing device according to claim 1, characterized in that: The positioning frame plate (21) is a horizontally arranged flat plate. Four through holes (23) are provided on the positioning frame plate (21). The four through holes (23) are arranged in a rectangular shape at the four corners of the positioning frame plate (21). Each of the through holes penetrates the upper and lower sides of the positioning frame plate (21). An adjusting bolt (22) is vertically inserted into each of the through holes (23). The upper end of the adjusting bolt (22) is horizontally rotatably mounted above the positioning frame plate (21), and the lower end of the adjusting bolt (22) is vertically extended below the positioning frame plate (21). The adjusting pressure plate (2) is connected to the lower end of the adjusting bolt (22) by means of a thread, and the adjusting pressure plate (2) is suspended directly below the positioning frame plate (21) by means of the adjusting bolt (22).

3. A sealant adhesiveness testing device according to claim 1, characterized in that: A positioning platform (41) is relatively rotatably arranged at the bottom of the detection turntable (4), the positioning platform (41) is a flat plate, the bottom of the positioning platform (41) is fixedly arranged on the top of the workbench (1), and the top of the detection turntable (4) is fixed on the bottom of the clamping bottom plate (3); The detection turntable (4) is mounted on the top of the positioning platform (41) so as to rotate horizontally along a vertical axis.

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