An adhesive tensile shear sample bonding sample making tool
By designing upper and lower molds and limiting structures, the problem that existing tooling cannot guarantee the pressing state and coating thickness was solved, and the stability and efficient curing of adhesive tensile shear specimens were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SEEBAIKE TECHNOLOGY (SUZHOU) CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-19
AI Technical Summary
Existing adhesive tensile shear testing fixtures cannot guarantee the compression state of the shearing discs, resulting in poor bonding performance and failing to meet the requirements for different coating thicknesses.
Design a tooling for bonding adhesive tensile shear specimens, including an upper mold and a lower mold. The coaxiality of the shearing disc and the thickness of the adhesive layer are ensured by limiting posts and gasket grooves, and uniform pressure is provided by spring plates. Precision fit is achieved by using positioning pins and bushing holes. Demolding grooves and through holes are set to improve curing efficiency.
To ensure that the sheared disc does not shift laterally during the bonding process, uniform pressure is achieved, different adhesive layer thickness requirements are met, the stability of test results and the efficiency of heat curing are improved, and human operation errors and adhesion risks are reduced.
Smart Images
Figure CN224382922U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of adhesive tensile shear testing technology, and in particular to a tooling for preparing adhesive tensile shear test specimens. Background Technology
[0002] Adhesives bind materials together through physical adhesion or chemical bonding, and tensile shear strength is an important indicator of their bonding performance. The polar compatibility of the adhesive and the adherend, the surface treatment of the adherend, and the wettability of the adhesive all affect the shear strength. Another important external influencing factor is whether the shear sample is made to standard.
[0003] Chinese utility model patent CN210014967U discloses a sample preparation tool for tensile shear strength of adhesives, including a sample positioning plate. The sample positioning plate has multiple first positioning grooves and second positioning grooves arranged coaxially with the first positioning grooves. The sample positioning plate has a first rectangular groove connected to the first positioning grooves and a second rectangular groove connected to the second positioning grooves along its length. The first rectangular grooves are perpendicular to the first positioning grooves and are arranged in the same plane, and the second rectangular grooves are perpendicular to the second positioning grooves and are arranged in the same plane. The first rectangular grooves and the second rectangular grooves are staggered vertically. A first demolding area is formed in the first rectangular groove, and a second demolding area is formed in the second rectangular groove.
[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: The above solutions ensure the bonding dimensions, parallelism, coaxiality, and coating thickness of the shearing sheet by opening grooves, but the above tooling cannot press the shearing sheet into a pressed state, resulting in poor bonding effect and affecting test results. Furthermore, the coating thickness of the adhesive in the above tooling is uniform and cannot meet the requirements of the bonding test for different coating thicknesses. Utility Model Content
[0005] To address the aforementioned problems, this utility model provides a tooling for bonding adhesive tensile shear specimens.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a tooling for bonding adhesive tensile shear specimens, comprising an upper mold and a lower mold in the shape of rectangular plates that cooperate with each other. The upper surface of the lower mold has a first placement groove and a second placement groove arranged side by side. The bottom of the first placement groove is higher than the bottom of the second placement groove. The bottom of the first placement groove has a plurality of gasket grooves arranged inward. The plurality of gasket grooves are arranged parallel to each other along the length direction of the first placement groove. The gasket grooves are used to place gaskets of different thicknesses. A row of first limiting posts is arranged on each side of the first placement groove along the length direction of the gasket groove. A plurality of rows of second limiting posts are arranged parallel to each other along the length direction of the bottom surface of the second placement groove, and each row of second limiting posts is collinear with the corresponding row of first limiting posts. The lower surface of the upper mold has a plurality of spring grooves on the side corresponding to the second placement groove. The plurality of spring grooves are arranged parallel to each other along the length direction of the second placement groove and correspond one-to-one with the gasket grooves. Spring plates are arranged in the spring grooves.
[0007] By adopting the above technical solution, the sample is clamped using an upper mold and a lower mold. After the mold is closed, a pressing force can be provided by placing a weight on the upper mold or using tools such as pliers, thereby applying uniform and continuous pressure to the sample. This ensures that the adhesive is subjected to uniform force during the curing process, guarantees the bonding effect, and improves the quality stability of the sample. A first placement groove, a second placement groove, a first limiting post, and a second limiting post are set up. The first and second placement grooves are used to place two shearing pieces, respectively. The first and second limiting posts are used to precisely limit the two shearing pieces and ensure coaxiality, ensuring that the shearing pieces will not shift laterally during the bonding process, ensuring the consistency of the bonding area, and avoiding deviations in test results due to sample misalignment. A gasket groove is set in the first placement groove. By placing gaskets of different thicknesses, the adhesive layer thickness can be adjusted to meet the requirements of different adhesive layer thicknesses in the bonding test.
[0008] Furthermore, the lower mold has two locating pins arranged diagonally, and the upper mold has two corresponding bushing holes.
[0009] By adopting the above technical solution, the positioning pin and bushing hole can guide the upper mold to accurately engage with the lower mold, achieving a precise fit. This avoids misalignment of the upper and lower molds due to human error and prevents uneven stress on the bonding area of the sample due to mold misalignment, which would affect the bonding effect.
[0010] Furthermore, the lower surface of the upper mold is provided with a plurality of limiting holes that cooperate with the first limiting post on one side of the first placement groove.
[0011] By adopting the above technical solution, the limiting hole is set to cooperate with the first limiting post, which further ensures the accurate cooperation between the upper and lower molds, and at the same time prevents the sample from being displaced longitudinally or vertically due to pressure or adhesive flow during the bonding process, thus ensuring the positional stability of the sample during the bonding process.
[0012] Furthermore, both the first and second placement slots have a demolding groove at their bottom, and the length direction of the demolding groove is consistent with the length direction of the placement slot.
[0013] By adopting the above technical solution and setting a demolding groove, it is easier to remove the sample.
[0014] Furthermore, the second placement groove has a plurality of first through holes along its length on the side adjacent to the first placement groove, and the plurality of first through holes correspond one-to-one with the gasket groove. The upper mold is provided with second through holes corresponding to the first through holes.
[0015] By adopting the above technical solution, a first through hole and a second through hole are set to expose the bonding part of the sample. In this way, the bonding part of the sample can be directly acted on during heat curing, which greatly improves the heat curing efficiency.
[0016] Furthermore, a limit stop is provided on the upper surface of the lower mold at the end of the gasket groove away from the second placement groove, and an avoidance groove is provided on the upper mold corresponding to the limit stop.
[0017] By adopting the above technical solution, a limiting block is set to limit the end of the sample in the first placement groove.
[0018] Furthermore, C-shaped handles are provided on both sides of the upper and lower molds.
[0019] By adopting the above technical solution and setting a C-shaped handle, the tooling can be easily moved and operated.
[0020] In summary, this utility model has the following beneficial effects:
[0021] 1. In this application, by setting a first placement groove, a second placement groove, a first limiting post, and a second limiting post, the first and second placement grooves are used to place two shearing discs respectively. The first and second limiting posts are used to precisely limit the two shearing discs and ensure coaxiality, ensuring that the shearing discs will not shift laterally during the bonding process, ensuring the consistency of the bonding area, and avoiding deviations in test results due to sample misalignment. Then, the sample is clamped by the upper and lower molds. After the molds are closed, a pressing force can be provided by placing a weight on the upper mold or using a strong pliers, thereby applying uniform and continuous pressure to the sample, so that the adhesive is subjected to uniform force during the curing process, ensuring the bonding effect and improving the quality stability of the sample.
[0022] 2. In this application, a gasket groove is provided in the first placement groove. By placing gaskets of different thicknesses, the adhesive layer thickness of the adhesive can be adjusted to meet the requirements of the bonding test for different adhesive layer thicknesses.
[0023] 3. In this application, the positioning pin and bushing hole are used to guide the upper mold to accurately engage with the lower mold, so as to achieve a precise fit and avoid misalignment of the upper and lower molds due to human operation error. This prevents uneven force on the bonding part of the sample due to mold misalignment, which would affect the bonding effect.
[0024] 4. In this application, a first through hole and a second through hole are provided to expose the bonding part of the sample. This allows the heat curing process to directly act on the bonding part of the sample, greatly improving the heat curing efficiency. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model during mold closing;
[0026] Figure 2 This is a schematic diagram of the structure of the lower mold in an embodiment of this utility model;
[0027] Figure 3 This is a schematic diagram of the upper mold in an embodiment of this utility model.
[0028] In the diagram: 10. Upper mold; 11. Spring groove; 12. Spring sheet; 13. Bushing hole; 14. Limiting hole; 15. Clearance groove; 20. Lower mold; 21. First placement groove; 22. Second placement groove; 23. Gasket groove; 24. First limiting post; 25. Second limiting post; 26. Positioning pin; 27. Demolding groove; 28. Limiting block; 31. First through hole; 32. Second through hole; 40. C-shaped handle. Detailed Implementation
[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0030] like Figure 1-3 As shown in the embodiment of this application, a sample preparation tool for bonding tensile shear test specimens of adhesives is disclosed, including an upper mold 10 and a lower mold 20. Both the upper mold 10 and the lower mold 20 are rectangular plates. The lower mold 20 is used to place the test specimen, and the upper mold 10 is used to fasten with the lower mold 20 to apply pressure to ensure the bonding effect of the test specimen.
[0031] Specifically, the upper surface of the lower mold 20 has a first placement groove 21 and a second placement groove 22 arranged side by side. The bottom of the first placement groove 21 is higher than the bottom of the second placement groove 22. The first placement groove 21 and the second placement groove 22 are used to place two shearing pieces, respectively. Several gasket grooves 23 are formed inward from the bottom of the first placement groove 21. These gasket grooves 23 are arranged parallel to each other along the length of the first placement groove 21. A row of first limiting posts 24 is arranged on each side of the gasket groove 23 within the first placement groove 21 along its length. Several rows of second limiting posts 25 are arranged parallel to each other along the length of the bottom surface of the second placement groove 22. The two rows of first limiting posts 24 and two rows of second limiting posts 25 can limit the two sides of the shearing pieces, ensuring that the shearing pieces do not shift laterally during the bonding process. The second limiting posts 25 are arranged collinearly with the corresponding row of first limiting posts 24, thus ensuring the coaxiality of the two shearing pieces, ensuring the consistency of the bonding area, and avoiding deviations in test results due to sample misalignment.
[0032] The gasket groove 23 is used to place gaskets of different thicknesses. By using gaskets of different thicknesses, the height between the two shearing plates can be adjusted, thereby adjusting the adhesive layer thickness between the two shearing plates to meet the requirements of different adhesive layer thicknesses for bonding tests.
[0033] The lower surface of the upper mold 10 is provided with a plurality of spring grooves 11 on one side corresponding to the second placement groove 22. The plurality of spring grooves 11 are arranged parallel to each other along the length direction of the second placement groove 22 and correspond one-to-one with the gasket grooves 23. Spring plates 12 are provided in the spring grooves 11. The spring plates 12 are used to fill the gap between the upper mold 10 and the bottom shear plate after the mold is closed. When the upper and lower molds 20 are closed, the spring plates 12 can apply uniform pressure to the sample in the second placement groove 22 to ensure the bonding effect. The spring plates 12 can also be replaced with other components that can fill the gap and apply pressure.
[0034] To ensure the accuracy of mold closing between the upper mold 10 and the lower mold 20, two locating pins 26 are arranged diagonally on the lower mold 20, and two bushing holes 13 are correspondingly provided on the upper mold 10, with a tolerance of H9 / f9. During mold closing, the locating pins 26 are inserted into the bushing holes 13, achieving precise positioning of the upper mold 10 and the lower mold 20. On the lower surface of the upper mold 10, corresponding to the first placement groove 21, several limiting holes 14 are also provided, which mate with the first limiting post 24. During mold closing, the first limiting post 24 is inserted into the limiting holes 14, enhancing the fixation of the sample within the first placement groove 21.
[0035] To facilitate the removal of the bonded sample, a release groove 27 is provided at the bottom of both the first placement groove 21 and the second placement groove 22. The length direction of the release groove 27 is consistent with the length direction of the placement groove. The release groove 27 reduces the contact area between the sample and the bottom of the groove, thus reducing the adhesion force between the sample and the tooling. After the adhesive cures, the sample is easier to remove from the placement groove, avoiding deformation or damage to the sample during removal due to excessive adhesion to the bottom of the groove. This improves the ease of demolding and also protects the integrity of the sample, ensuring the smooth progress of subsequent tests.
[0036] A plurality of first through holes 31 are provided along the length of the second placement groove 22 adjacent to the first placement groove 21. Each of the first through holes 31 corresponds to a gasket groove 23. A second through hole 32 is provided on the upper mold 10 corresponding to the first through holes 31. The first through holes 31 and the second through holes 32 are designed to expose the bonding part of the sample. This allows the heat curing process to directly act on the bonding part of the sample, greatly improving the heat curing efficiency.
[0037] A limiting block 28 is provided on the upper surface of the lower mold 20 at the end of the gasket groove 23 away from the second placement groove 22. The limiting block 28 precisely limits the end of the sample in the first placement groove 21 and ensures that the placement positions of multiple samples are consistent in the length direction. This ensures that the bonding parts of all samples are on the same baseline, avoiding differences in bonding length due to different end positions of the samples, thus ensuring the consistency of the test samples and making the test results more comparable. A clearance groove 15 is provided on the upper mold 10 corresponding to the limiting block 28 to avoid collision and interference between the upper mold 10 and the limiting block 28 during mold closing, ensuring the smoothness of the mold closing process and protecting the mold from damage.
[0038] Specifically, the surface roughness of the working areas of the upper mold 10 and the lower mold 20 is Ra0.6, the surface roughness of the non-working areas is Ra3.2, the cavity flatness accuracy of the working area is ±0.03mm, the clearance tolerance of the repair fitting mold is ±0.05mm, and the shim thickness tolerance is ±0.02mm.
[0039] C-shaped handles 40 are provided on both sides of the upper mold 10 and the lower mold 20. The length of the C-shaped handle 40 on the upper mold 10 is greater than that on the lower mold 20, making it easier for operators to grip. The C-shaped handles 40 facilitate the handling and operation of tooling. When handling tooling, the C-shaped handles 40 make it easier to apply force, reducing the labor intensity of operators; during mold closing and opening, operators can use the C-shaped handles 40 to stably control the opening and closing of the mold, avoiding slippage due to the smooth surface of the mold, thus improving the safety and convenience of operation.
[0040] The working principle of the adhesive tensile shear specimen bonding tooling in this embodiment is as follows: First, the first shear plate is placed between the two rows of second limiting posts 25 in the second placement groove 22, with the sides limited by the second limiting posts 25 and the ends limited by the two side walls of the second placement groove 22; then, a gasket of appropriate thickness is selected according to the required adhesive layer thickness and placed in the gasket groove 23; adhesive is applied to the first shear plate at the bonding position, and the second shear plate is placed between the two rows of first limiting posts 24 in the first placement groove 21; the upper mold 10 is closed and positioned by the positioning pin 26 and the bushing hole 13, ensuring that the first limiting post 24 is inserted into the limiting hole 14 to ensure positioning accuracy; then, the curing time is 120 minutes at 120℃; finally, the upper mold 10 is opened and the bonded specimen is taken out.
[0041] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A tooling for bonding and preparing adhesive tensile shear specimens, characterized in that: The device includes an upper mold (10) and a lower mold (20) that are rectangular plates that fit together. The upper surface of the lower mold (20) has a first placement groove (21) and a second placement groove (22) arranged side by side. The bottom of the first placement groove (21) is higher than the bottom of the second placement groove (22). The bottom of the first placement groove (21) has a plurality of gasket grooves (23) arranged inwardly. The plurality of gasket grooves (23) are arranged parallel to each other along the length of the first placement groove (21). The gasket grooves (23) are used to place gaskets of different thicknesses. The first placement groove (21) contains gasket grooves (23). The upper mold (10) has a row of first limiting posts (24) on each side along its length. The bottom surface of the second placement groove (22) has several rows of second limiting posts (25) arranged parallel to each other along its length. Each row of second limiting posts (25) is collinear with the corresponding row of first limiting posts (24). The lower surface of the upper mold (10) is provided with several spring grooves (11) on the side corresponding to the second placement groove (22). The several spring grooves (11) are arranged parallel to each other along the length of the second placement groove (22) and correspond one-to-one with the gasket groove (23). A spring sheet (12) is provided in the spring groove (11).
2. The adhesive tensile shear specimen bonding and sample preparation tool according to claim 1, characterized in that: The lower mold (20) has two locating pins (26) arranged diagonally, and the upper mold (10) has two bushing holes (13) correspondingly formed.
3. The adhesive tensile shear specimen bonding and sample preparation tool according to claim 1, characterized in that: The lower surface of the upper mold (10) is provided with a plurality of limiting holes (14) that cooperate with the first limiting post (24) on one side of the first placement groove (21).
4. The adhesive tensile shear specimen bonding and sample preparation tool according to claim 1, characterized in that: The bottom of the first placement groove (21) and the second placement groove (22) are both provided with a demolding groove (27), and the length direction of the demolding groove (27) is consistent with the length direction of the placement groove.
5. The adhesive tensile shear specimen bonding and sample preparation tool according to claim 1, characterized in that: The second placement groove (22) has a plurality of first through holes (31) along its length on the side adjacent to the first placement groove (21). The plurality of first through holes (31) correspond one-to-one with the gasket groove (23). The upper mold (10) has a second through hole (32) corresponding to the first through hole (31).
6. The adhesive tensile shear specimen bonding and sample preparation tool according to claim 1, characterized in that: The upper surface of the lower mold (20) is provided with a limit stop (28) at the end of the gasket groove (23) away from the second placement groove (22), and the upper mold (10) is provided with an avoidance groove (15) corresponding to the limit stop (28).
7. The adhesive tensile shear specimen bonding and sample preparation tool according to claim 1, characterized in that: Both sides of the upper mold (10) and the lower mold (20) are provided with C-shaped handles (40).