Sample preparation jig for testing drawing force of adhesive

Abstract

The utility model relates to the field of adhesive bonding strength testing, in particular to an adhesive drawing force testing sample preparation jig which comprises a base and a supporting column, a cross-shaped boss is fixedly arranged above the base, and a sliding rail groove is formed in each side edge of the cross-shaped boss; the bottom of the supporting column is nested in a sliding rail groove, and the supporting column and the base are fixed through a threaded rotor 1. The supporting columns are divided into two fixed-height supporting columns which are oppositely arranged and two adjustable supporting columns which are oppositely arranged. According to the utility model, the bonding of base materials with different sizes can be realized, the bonding area can be accurately controlled, and the thickness of an adhesive is controllable.

Description

Technical Field

[0001] The utility model relates to the field of adhesive bonding strength testing, in particular to a sample preparation jig for adhesive pull-out force testing. Background Art

[0002] Pull-out testing plays a central role in adhesive performance evaluation. This test directly reflects the adhesive's stability and reliability under load. The cross-lap method is a commonly used method for pull-out testing due to its intuitiveness and convenience.

[0003] The cross-lap test typically involves several key steps: first, a line of adhesive is applied to the center of the first substrate; then, a second substrate is bonded to the first substrate to form a stable cross-lap joint. Because this process must be repeated multiple times during the experiment to obtain more accurate and comprehensive data, ensuring consistency in the bond area between the first and second substrates is crucial for each test.

[0004] However, existing sample preparation jigs on the market suffer from inaccuracies in controlling the bonding area, thickness, and position. This makes them incompatible with substrates of varying sizes and materials, increasing test errors. Therefore, we are committed to developing a new cross-lap test sample preparation jig that achieves precise control of the bonding area and is compatible with substrates of varying sizes and materials, ensuring the accuracy and reliability of test results. Utility Model Content

[0005] The utility model aims to solve the deficiencies in the prior art and provides a sample preparation jig for testing the pull-out force of an adhesive.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] The adhesive pull-out force test sample preparation jig includes a base and four support columns. A cross-shaped boss is fixedly provided on the top of the base, and each side of the cross-shaped boss has a slide rail groove; the bottom of the support column is nested in the slide rail groove, and the support column and the base are fixed by a threaded rotor 1. The number of the support columns is 4.

[0008] The support column is the bearing pillar of the first substrate and the second substrate, making the first substrate and the second substrate perpendicular to each other to ensure precise control of the bonding area; the support column can move in the slide groove and is fixed by a spiral rotor to meet the testing requirements of substrates of different lengths.

[0009] Furthermore, the support columns are divided into two relatively arranged fixed-height support columns and two relatively arranged adjustable support columns.

[0010] The height of the adjustable support column can be adjusted to precisely control the thickness of the adhesive.

[0011] Furthermore, the adjustable support column is divided into an upper portion and a lower portion, and the upper portion and the lower portion are slidably engaged with each other to achieve height adjustment of the adjustable support column.

[0012] Furthermore, the upper portion of the adjustable support column and the lower portion of the adjustable support column are connected and fixed by means of a threaded rotor 2 .

[0013] Furthermore, the lower portion of the adjustable support column is engraved with scales, and the scales increase from bottom to top.

[0014] Furthermore, the upper portion of the adjustable support column is engraved with scales, and the scales increase downward from the transverse clamping position between the upper portion and the lower portion.

[0015] Furthermore, the top of each support column has an L-shaped notch. The two L-shaped notches on the fixed-height support column are symmetrical, and the two L-shaped notches on the adjustable support column are symmetrical. This allows substrates wider than the cross-section of the top end of the support column to be placed on the support column, meeting the testing requirements of a large bonding area.

[0016] Furthermore, the height of the fixed-height support column is H1, the height of the adjustable support column is H2, H2>H1; the thickness of the first substrate is H3, the thickness of the adhesive is H4, and the relationship between the four satisfies the formula: H2=H1+H3+H4.

[0017] Furthermore, the support column is a rectangular parallelepiped.

[0018] Furthermore, the cross-section of the upper end of the support column is square.

[0019] Furthermore, the support column and the base are made of polytetrafluoroethylene.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the sample preparation jig can be suitable for substrates of different lengths and widths through four symmetrical and slidable support columns and L-shaped notches on the top of the support columns, and can maintain a consistent bonding area in multiple repeated experiments. The thickness of the adhesive can be precisely controlled by the scale on the adjustable support columns. The structure is simple and easy to use.

[0021] To make the above and other purposes, features and advantages of the present invention more clearly understood, preferred embodiments are described below in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0023] Explanation of the numbers in the figure: 1 base; 2 slide rail groove; 3 cross-shaped boss; 4 fixed height support column; 5 adjustable support column; 6 upper part of adjustable support column; 7 lower part of adjustable support column; 8 scale; 9 threaded rotor 1; 10 threaded rotor 2; 11 L-shaped notch. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] The utility model relates to a sample preparation jig for testing the pull-out force of an adhesive, such as Figure 1 As shown, the sample preparation fixture includes a base 1 and four support columns, wherein a cross-shaped boss 3 is fixedly provided on the top of the base 1; each side of the cross-shaped boss 3 has a slide groove 2; the bottom of the support column is nested in the slide groove 2; the support column and the base 1 are fixed by a threaded rotor 1 (9); the support column can ensure that the two substrates are perpendicular, thereby accurately controlling the bonding area of the adhesive.

[0027] The support column is divided into two relatively set fixed height support columns 4 and two relatively set adjustable support columns 5. The adjustable support column 5 is divided into an adjustable support column upper part 6 and an adjustable support column lower part 7. The adjustable support column upper part 6 and the adjustable support column lower part 7 are slidably engaged and fixed by means of a threaded rotor 2 (10).

[0028] The lower portion 7 of the adjustable support column is engraved with a scale 8, which can accurately control the thickness of the adhesive. When the thickness of the adhesive needs to be increased, the adjustable support column is adjusted upward, and the adjustment range is the thickness of the adhesive.

[0029] An L-shaped notch 11 is set at the top of the support column. The two L-shaped notches 11 on the fixed height support column 4 are symmetrical, and the two L-shaped notches 11 on the adjustable support column 5 are symmetrical. The L-shaped notch 11 and the slide rail groove 2 can ensure that the sample preparation jig is suitable for substrates of various lengths and widths.

[0030] The height of the fixed-height support column 4 is H1, the height of the adjustable support column 5 is H2, the thickness of the first substrate is H3, and the thickness of the adhesive is H4. The relationship between the four satisfies: H2=H1+H3+H4.

[0031] The support column is a rectangular parallelepiped, and the cross section of the upper end thereof is a square. The support column and the base 1 are made of polytetrafluoroethylene.

[0032] Directions:

[0033] This sample preparation fixture is placed on a horizontal panel for use. Slide the support column to the appropriate position according to the size of the test substrate, tighten the threaded rotor 1, and fix the support column to the base; place the first substrate on the two fixed-height support columns; apply glue to the middle of the top surface of the first substrate, adjust the upper parts of the two adjustable support columns to the appropriate position according to the required glue layer thickness, tighten the threaded rotor 2 to ensure that the two adjustable support columns are at the same height, and place the second substrate on the two adjustable support columns.

[0034] Under the action of the support column, the lower, left or right, and rear end of the first substrate are restricted from movement, and the lower, left or right, and rear end of the second substrate are restricted from movement, ensuring that the two substrates are perpendicular to each other and the bonding area is accurately controllable; the scale at the bottom of the adjustable support column ensures that the thickness of the adhesive layer is controllable.

[0035] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Adhesive pull-out force test sample preparation fixture, characterized by: It comprises a base (1) and a support column; A cross-shaped boss (3) is fixedly provided above the base (1), and each side of the cross-shaped boss (3) is provided with a slide rail groove (2); The bottom of the support column is nested in the slide rail groove (2), and the support column and the base (1) are fixed by means of a threaded rotor 1 (9). The number of the support columns is 4.

2. The adhesive pull-out force test sample preparation jig according to claim 1, characterized in that: The support columns are divided into two relatively arranged fixed-height support columns (4) and two relatively arranged adjustable support columns (5).

3. The adhesive pull-out force test sample preparation jig according to claim 2, characterized in that: The adjustable support column (5) is divided into an adjustable support column upper part (6) and an adjustable support column lower part (7), and the adjustable support column upper part (6) and the adjustable support column lower part (7) are slidably engaged.

4. The adhesive pull-out force test sample preparation jig according to claim 3, characterized in that: The upper portion (6) of the adjustable support column and the lower portion (7) of the adjustable support column are connected and fixed by means of a threaded rotor 2 (10).

5. The adhesive pull-out force test sample preparation jig according to claim 3, characterized in that: The lower portion (7) of the adjustable support column is engraved with scales (8).

6. The adhesive pull-out force test sample preparation jig according to claim 3, characterized in that: The upper portion (6) of the adjustable support column is engraved with scales (8).

7. The adhesive pull-out force test sample preparation jig according to claim 2, characterized in that: The top end of the support column is an L-shaped notch (11), the two L-shaped notches (11) on the fixed-height support column (4) are symmetrical, and the two L-shaped notches (11) on the adjustable support column (5) are symmetrical.

8. The adhesive pull-out force test sample preparation jig according to claim 2, characterized in that: The fixed-height support column (4) has a height of H1, and the adjustable support column (5) has a height of H2, where H2>H1.

9. The adhesive pull-out force test sample preparation jig according to claim 1, characterized in that: The supporting column is a cuboid.

10. The adhesive pull-out force test sample preparation jig according to claim 9, characterized in that: The cross section of the upper end of the support column is square, and the support column and the base (1) are made of polytetrafluoroethylene.

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