CN114577717A - Coating adhesive force testing device with controllable drawing angle - Google Patents

Abstract

The invention relates to the technical field of adhesive force testing equipment, in particular to a coating adhesive force testing device with a controllable pulling angle, which comprises a base, a fixing piece and an adhesive tape directional supporting unit, wherein the fixing piece is used for fixedly connecting the base with a piece to be tested, the adhesive tape directional supporting unit is arranged on the base, a through hole for allowing a measuring adhesive tape to pass through is arranged on the base along the thickness direction of the base, and the adhesive tape directional supporting unit comprises an angle measurer and a supporting frame, the angle measurer is used for determining the inclination angle of the measuring adhesive tape, and the supporting frame is used for keeping the inclination angle of the measuring adhesive tape. Because the support frame keeps the inclination angle of the measuring adhesive tape, the measuring adhesive tape can not change the inclination angle due to the change of the drawing direction of a measurer, so that the measuring process of the adhesive force is standardized, the measuring error is reduced, and the measuring accuracy is improved.

Description

A coating film adhesion test device with controllable pulling angle

technical field

The invention relates to the technical field of adhesion testing equipment, in particular to a coating film adhesion testing device with a controllable pulling angle.

Background technique

After the coating product is constructed by the corresponding process, a protective or decorative coating film layer is formed on the surface of the coated object, but only when the coating film is firmly adhered to the coated object or the coated object can we use it for protective or decorative purposes. The combination of the coating film and the coated surface through physical and chemical action, the firmness and durability of the adhesion of the coating film on the coated object is an important influence on the service life or aesthetic durability of the coated object. one of the factors. The surface to be coated can be a bare substrate or a painted substrate. The bonding force between the coating film and the surface to be coated can be roughly divided into two situations: one is that the coating forms a film after a chemical reaction, and the polar groups (such as hydroxyl or carboxyl) of the polymer in the paint film interact with the surface of the coated object. The polar groups chemically react with each other to form binding force; second, the coating product is formed into a film in a physical way, and the binding force is the van der Waals force, hydrogen bond and other forces formed between the paint film and the coated object.

At present, the test methods for coating adhesion are divided into cross-cut method and pull-off method, and there are a total of six standard test methods. Among them, the cross-cut method is the most used and the most convenient in the coating industry. In the cross-cut method, three cross-cut methods are used for detection, namely the circle method (corresponding to the standard GB/T 1720), the cross-cut method (corresponding to the standard ASTM D 3359-A, JIZK5400), and the hundred grid method (corresponding to the standard ASTM D 3359-B, GB/T 9286, ISO2409, BS 3900-E6, GB/T5270, ASTM B571). The requirements for the test instruments are different in these three cross-cut tests. The circle-drawing method requires a circle-drawing adhesion tester, the X-scribing method requires a ruler and a knife, and the hundred-square method requires a hundred-square board or a hundred-square knife. Among them, the X-ray method and the 100-grid method need to use pressure-sensitive tape to fully bond the cross-cut area after the test panel is cross-cut, and then tear the tape along the angle specified by the standard or the angle specified by the customer for evaluation. The firmness of the paint film.

In the current test, the X method is relatively simple, that is, use a ruler to cross the test plate in the diagonal direction and penetrate it, and then stick it on the surface of the cross with a standard tape and tear it at a certain angle. The adhesive tape is used to observe the adhesion strength of the surface coating; the instruments and tools for the adhesion of the 100 grid method are mainly 100 grid plates or 100 grid knives. The pattern is cut and penetrated, cut horizontally and vertically to form 100 square grids, and then stick it on the surface of the grid with a standard tape, and tear off the tape at a certain angle to observe the adhesion strength of the surface coating. The severity of the coating fall is graded. In these two cross-cutting methods, after the cross-cutting is completed, it is necessary to use standard tape to stick and tear the surface of the cross-cut area, and specify the tearing angle. The tearing angle is different, and the paint falls off. Circumstances and severity will vary.

However, in actual tearing, due to different experimenters, equipment, and environments, the angle of tearing and the fixing of the test plate and the tape are different. The current testing instruments and equipment have the following problems:

1. The tearing angle is inaccurate. For example, ASTM D 3359-B requires the tearing angle to be 180°, but when the operator tears at 160° or 150°, the tearing force of the paint film at the cross-cut area will be different from the standard requirement. In GB/T 9286 and ISO2409 standards, it is required that after the tape is pasted, the angle of tearing force is 60°. In actual operation, it is a difficult problem to accurately determine 60°, and it is difficult for operators to accurately determine by subjective feeling. out 60°;

2. The repeatability and reproducibility are poor. Based on the first problem, when repeating and reproducing the test, the test results of the tester and/or the same tester in different time periods will be affected by the angle and change;

3. The convenience is not good. During the test, after the tape and the scratched coating are fully contacted and pasted, the test plate is often torn together during tearing, and the movement of the test plate will lead to the failure of the test. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a coating film adhesion test device with a controllable pulling angle, so as to solve the problem of inaccurate pulling angle and inconsistent pulling angle of the measuring tape during the coating film adhesion test in the prior art. Stability issue.

For achieving the above object, the basic scheme of the present invention is as follows:

A coating film adhesion test device with a controllable pulling angle, comprising a base, a fixing member for fixedly connecting the base and a test piece, and a tape directional support unit arranged on the base, the base is along the base The thickness direction of the base is provided with a passage hole for the measurement tape to pass through, and the tape orientation support unit includes an angle measurer for determining the inclination angle of the measurement tape and a support frame for maintaining the inclination angle of the measurement tape.

The principle and beneficial effects of the basic scheme of the coating film adhesion test device with a controllable pulling angle of the present invention are as follows:

Draw a grid in the area to be measured on the surface to be measured of the component to be measured, and bond the measuring tape to the surface of the area to be measured of the component to be measured, leaving a margin for pulling at the end of the measuring tape. Adjust to the specified measurement angle, pass the end of the measurement tape through the through slot on the base, use the angle measurer to adjust the inclination angle of the end of the measurement tape to the specified angle, and use the support bracket to maintain the inclination angle of the measurement tape. The parts to be tested are fixedly connected, and the end of the measuring tape is pulled to the oblique direction of the measuring tape to measure the adhesion of the coating film.

In the process of pulling the measurement tape, since there is a support frame to maintain the inclination angle of the measurement tape, the measurement tape will not change the inclination angle due to the change of the pulling direction of the measurement personnel, thereby making the measurement process of the adhesion standard standard and reducing the measurement error and improve the accuracy of measurement.

Further, the angle measuring device includes a horizontally arranged fixed plate and a movable plate rotatably connected to the fixed plate, the fixed plate and the movable plate are both U-shaped, and the open end of the fixed plate is connected to the fixed plate. The open ends of the movable plate are oppositely arranged, the fixed plate is arranged on the upper surface of the base and is fixedly connected to the base, the open end of the fixed plate is located above the passage hole, and the two side plates of the open end of the fixed plate are connected to the movable plate. A first rotating shaft is arranged horizontally and coaxially between the two sides of the open end of the plate, the fixed plate and the movable plate are rotatably connected by two coaxially arranged first rotating shafts, and the outer side of the fixed plate is fixedly connected for reading the movable plate around the The reading plate of the rotation angle of the first rotating shaft, after flipping the movable plate to make the movable plate rotate a certain angle around the first rotating shaft, the reading of the angle between the movable plate and the base surface can be read from the reading plate.

Further, the support frame includes two support plates arranged in parallel and rotatably connected with the first rotating shafts on both sides of the fixed plate, and a connecting plate fixedly connecting the two support plates. When the movable plates are rotated at the same angle around the first rotating shaft, the front end surface of the supporting plate is coplanar with the upper surface of the movable plate, and the end of the supporting plate away from the first rotating shaft is parallel with a connecting shaft, and the connecting shaft is horizontal The two ends of the connecting shaft are respectively rotatably connected with the two supporting plates, a gap for allowing the measuring tape to pass through is formed between the two connecting shafts, the gap is coplanar with the front end surface of the supporting plate, and the base A first chute is horizontally arranged on the upper surface along a direction perpendicular to the axis of the first rotating shaft, a threaded rod is horizontally arranged in the chute along the length direction of the first chute, one end of the threaded rod is rotatably connected to the base, and the threaded rod The other end of the rod protrudes out of the base, the threaded rod is threadedly connected to a nut seat, the two side walls of the first chute are provided with a second chute along the length of the first chute, and the nut seat is close to the first chute Both sides of the side wall of the slot are fixed with a second slide plate matched with the second chute, a push rod is arranged on the nut seat, one end of the push rod is hinged with the nut seat, and the other end of the push rod is connected with the connecting plate Hinged, when the threaded rod is rotated, the threaded transmission makes the nut seat move on the threaded rod. When the nut seat moves toward the movable plate, the push rod hinged with the nut seat pushes the support plate to rotate around the first axis. When the threaded rod is not rotated after turning to a certain angle with the base, the nut seat is self-locked on the threaded rod. At this time, a stable triangular structure is formed between the threaded rod, the push rod and the base to keep the support plate fixed. .

Further, in order that the movable plate can stay still after rotating at any angle to facilitate reading the rotation angle of the movable plate, the first rotating shaft is set as a damping rotating shaft.

Further, the fixing member is one or more of straps, screws, calipers or powerful magnets.

Further, in order to facilitate the rotation of the threaded rod, a handwheel is fixedly connected to the end of the threaded rod extending out of the base.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention in the front view direction.

FIG. 2 is a schematic view of the structure in the top view direction after the movable plate and the support plate are laid flat.

FIG. 3 is a schematic view of the structure in the front view direction when the upper surface of the movable plate is attached to the measuring tape.

Figure 4 is a schematic view of the structure in the front view direction when the movable plate is turned over and placed.

FIG. 5 is a schematic structural diagram of the first chute.

Detailed ways

The following is further described in detail by specific embodiments:

Reference numerals in the drawings in the description include: DUT 10 , base 20 , passage hole 201 , fixed plate 301 , movable plate 302 , first rotating shaft 303 , reading plate 304 , support plate 401 , connecting plate 402 , connecting shaft 403 , gap 404 , first chute 405 , threaded rod 406 , nut seat 407 , second chute 408 , second sliding plate 409 , push rod 501 , measuring tape 60 , handle 70 .

Example 1

A coating film adhesion test device with a controllable pulling angle in this embodiment includes a base 20, a fixing member for fixedly connecting the base 20 and the test piece 10, and a tape directional support unit disposed on the base 20. The fixing member It is one or more of a strap, a screw or a caliper, and a strap is preferred in this embodiment. The base 20 is provided with a passage hole 201 through the base 20 along the thickness direction of the base 20 to allow the measurement tape 60 to pass through. The tape directional support unit includes: An angle measurer for determining the inclination angle of the measurement tape 60 and a support frame for maintaining the inclination angle of the measurement tape 60 .

As shown in FIG. 1 and FIG. 2 , the angle measuring device includes a horizontally arranged fixed plate 301 and a movable plate 302 rotatably connected with the fixed plate 301 . Both the fixed plate 301 and the movable plate 302 are U-shaped, and the opening of the fixed plate 301 The fixed plate 301 is arranged on the upper surface of the base 20 and is fixedly connected to the base 20. The open end of the fixed plate 301 is located above the passage hole 201, and the two side plates of the open end of the fixed plate 301 are connected to the movable plate 301. The first rotating shaft 303 is arranged horizontally and coaxially between the two sides of the open end of the plate 302. In order to make the movable plate 302 stay still after rotating at any angle, the first rotating shaft 303 is set as a damping rotating shaft. The fixed plate 301 and the movable plate 302 The two coaxially arranged first shafts 303 are rotatably connected, and the outer side of the fixed plate 301 is fixedly connected to the reading plate 304. The reading plate 304 is engraved with a scale line and a corresponding degree mark for measuring the flip angle of the movable plate 302. After the plate 302 rotates the movable plate 302 around the first rotating shaft 303 by a certain angle, the upper surface of the movable plate 302 is rotated to be aligned and coplanar with a certain scale line on the reading plate 304, then the reading mark corresponding to the scale line is the movable plate. The angle between the 302 and the base 20.

As shown in FIG. 1 and FIG. 2 , the support frame includes two support plates 401 arranged in parallel, one end of one support plate 401 is rotatably connected to the first rotating shaft 303 on one side of the fixed plate 301 , and one end of the other support plate 401 is connected to the fixed plate 301 . The first rotating shaft 303 on the other side of the plate 301 is rotatably connected, a connecting plate 402 is arranged horizontally between the two supporting plates 401 , one end of the connecting plate 402 is fixedly connected to a supporting plate 401 , and the other end of the connecting plate 402 is fixed to another supporting plate 401 Connection, the middle part of the connecting plate 402 is fixedly connected to the hinge seat, when the supporting plate 401 and the movable plate 302 are both rotated by the same angle around the first rotating shaft 303, the front end surface of the supporting plate 401 and the upper surface of the movable plate 302 are coplanar, and the supporting plate 401 One end away from the first rotating shaft 303 is provided with two parallel connecting shafts 403, the connecting shafts 403 are arranged horizontally, one end of the connecting shaft 403 is rotatably connected with a support plate 401, and the other end of the connecting shaft 403 is rotatably connected with another support plate 401 , a gap is left between the two connecting shafts 403 to form a gap 404 for the measurement tape 60 to pass through. The gap 404 is coplanar with the front end surface of the support plate 401 .

1 , 2 and 5 , a first chute 405 is horizontally arranged on the upper surface of the base 20 along a direction perpendicular to the axis of the first rotating shaft 303 , and the inside of the first chute 405 is along the length direction of the first chute 405 A threaded rod 406 is arranged horizontally, one end of the threaded rod 406 is rotatably connected to the base 20, the other end of the threaded rod 406 extends out of the base 20, and one end of the threaded rod 406 protrudes out of the base 20 is fixedly connected to the handwheel for easy rotation of the threaded rod 406 , the threaded rod 406 is threadedly connected to the nut seat 407, the upper surface of the nut seat 407 is fixedly connected to the hinge seat, the two side walls of the first chute 405 are provided with a second chute 408 along the length of the first chute 405, Both sides of the side wall of the nut seat 407 close to the first chute 405 are integrally formed with the nut seat 407 to form a second sliding plate 409 . The second sliding plate 409 is arranged horizontally. The nut seat 407 is provided with a push rod 501 , one end of the push rod 501 is hinged with the hinge seat on the nut seat 407 , and the other end of the push rod 501 is hinged with the hinge seat on the connecting plate 402 .

In specific use, a grid is drawn in the area to be measured on the surface to be measured of the component to be measured 10, the measurement tape 60 is well bonded to the surface of the area to be measured of the component to be measured 10, and after the measurement tape 60 is pasted, the movable The plate 302 is rotated around the first rotating shaft 303 and turned over and adjusted to be aligned with the scale line of the specified angle on the reading plate 304, and the movable plate 302 keeps the flip angle unchanged under the damping of the first rotating shaft 303;

Rotating the handle 70 makes the nut seat 407 move toward the movable plate 302 along the threaded rod 406 , and the nut seat 407 pushes the support plate 401 to turn around the first rotation axis 303 through the push rod 501 . Stop rotating the handwheel when the surfaces are coplanar;

As shown in FIG. 1 , the end of the measuring tape 60 is passed through the passage hole 201 and then passed through the gap 404 between the two connecting shafts 403 to keep the measuring tape 60 in a flat state with a certain tension force;

As shown in FIG. 3 , the base 20 is moved so that the upper surface of the movable plate 302 is coplanar with the measurement tape 60 , and the base 20 is kept without using straps or screws to fix the base 20 and the DUT 10 ;

As shown in FIG. 4 , rotating the movable plate 302 away from the measurement tape 60 prevents the measurement tape 60 from adhering to the movable plate 302 and affects the pulling of the measurement tape 60 .

Since the nut seat 407 has a self-locking function on the threaded rod 406, the nut seat 407 will not move on the threaded rod 406 without rotating the threaded rod 406. Therefore, when the handle 70 is not rotated, the push rod 501, the support The plate 401 and the base 20 form a stable triangular structure. Therefore, after the base 20 and the DUT 10 are fixedly connected with the fixing piece, the adjusted angle of the support plate 401 remains unchanged. During the process of pulling the measuring tape 60 , the inclination angle of the measurement tape 60 passing through the gap 404 between the two connecting shafts 403 on the support plate 401 is limited by the two connecting shafts 403 and remains unchanged, which improves the measurement accuracy.

When the base 20 is moved so that the upper surface of the movable plate 302 is coplanar with the measurement tape 60, the inclination of the measurement tape 60 is the same as the inclination angle of the movable board 302, the measurement tape 60 can accurately define the inclination angle, and the inclination of the measurement tape 60 is set. Rotate the movable plate 302 away from the measuring tape 60 after 10 degrees, so as to prevent the measuring tape 60 from sticking to the movable plate 302 and affecting the measurement result when the measuring tape 60 is pulled.

The above are only the embodiments of the present invention, and common knowledge such as well-known specific structures and characteristics in the solution are not described too much here. It should be pointed out that for those skilled in the art, some modifications and improvements can be made without departing from the structure of the present invention. These should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effectiveness and utility of patents. The scope of protection claimed in this application shall be based on the content of the claims, and the descriptions of the specific implementation manners in the description can be used to interpret the content of the claims.

Claims (6)

1. a coating film adhesion test device of a controllable pulling angle, is characterized in that: comprise a base, a fixing member that is fixedly connected with the base and the test piece and the tape directional support unit that is arranged on the base, The base is provided with a passage hole through the base along the thickness direction of the base to allow the measuring tape to pass through. 2 . The coating film adhesion testing device with a controllable pulling angle according to claim 1 , wherein the angle measuring device comprises a fixed plate horizontally arranged on the upper surface of the base and a fixed plate connected with the fixed plate. 3 . A movable plate connected by rotation, the fixed plate and the movable plate are both U-shaped, the open end of the fixed plate is arranged opposite to the open end of the movable plate, the fixed plate is fixedly connected to the base, and the fixed plate is fixed. The open end of the plate is located above the passage hole, the two side plates of the open end of the fixed plate and the two sides of the open end of the movable plate are both horizontally and coaxially arranged with a first rotating shaft, and the outer side of the fixed plate is fixedly connected for reading activities. The plate reads the angle that the plate rotates about the first axis of rotation. 3. The coating film adhesion testing device with a controllable pulling angle according to claim 2, wherein the support frame comprises two parallel-arranged and rotatably connected first shafts on both sides of the fixed plate respectively The supporting plate and the connecting plate that fixedly connect the two supporting plates, when the supporting plate and the movable plate are both rotated by the same angle around the first rotation axis, the front end surface of the supporting plate and the movable plate The upper surface of the support plate is coplanar, the end of the support plate away from the first rotating shaft is parallel with a connecting shaft, the connecting shaft is horizontally arranged, the two ends of the connecting shaft are respectively rotatably connected with the two support plates, and a volume is formed between the two connecting shafts. The gap through which the measuring tape passes, the gap is coplanar with the front end surface of the support plate, the upper surface of the base is horizontally provided with a first chute along the direction perpendicular to the axis of the first rotating shaft, the A threaded rod is horizontally arranged in a chute along the length direction of the first chute, one end of the threaded rod is rotatably connected to the base, the other end of the threaded rod protrudes out of the base, and the threaded rod is threadedly connected to the nut seat, the The two side walls of the first chute are provided with a second chute along the length direction of the first chute, and both sides of the side wall of the nut seat close to the first chute are fixedly connected to the second chute that cooperates with the second chute. Two sliding plates, a push rod is arranged on the nut seat, one end of the push rod is hinged with the nut seat, and the other end of the push rod is hinged with the connecting plate. 4 . The coating film adhesion testing device with a controllable pulling angle according to claim 3 , wherein the first rotating shaft is a damping rotating shaft. 5 . 5 . The coating film adhesion test device with a controllable pulling angle according to claim 4 , wherein the fixing member is one or more of a strap, a screw, a caliper or a strong magnet. 6 . 6 . The coating film adhesion test device with a controllable pulling angle according to claim 5 , wherein one end of the threaded rod extending out of the base is fixedly connected to a hand wheel. 7 .

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