JP2010249804A - Method and device for testing dynamic response and impact resistance of adhesive material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for testing a dynamic response and impact resistance of an adhesive material, for detecting a peel defect of a test specimen, and a device therefor. <P>SOLUTION: The first surface of a test specimen (106) is put on the second surface of the test specimen (106) to join with an adhesive agent and the first surface is clamp-fixed to a device (100) to prepare the test specimen (106). A conveyor mechanism (102) includes a means for cyclically dropping a load object with a predetermined mass from a predetermined height onto the test specimen (106). A conveyor (102) further includes a means for receiving a load object, a means for releasing the load object from the predetermined height to freely dropping onto the test specimen (106), and recovering the load object. A counting mechanism (110) includes a means for detecting a repetitive value of cyclic drops. A detecting mechanism (108) includes a means for detecting a peel defect of a test specimen (106). A conduct tube (104) includes a means for freely dropping the load object onto the test specimen (106) until the peel defect occurs from the height. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method and apparatus for testing the dynamic response and impact resistance of materials whose resistance to repeated low impact energy is based on adhesive strength.

  The dynamic response test and the impact resistance test are methods used to measure the adhesive strength of a test piece repeatedly applied with low impact energy. Typically, in dynamic response tests and impact resistance tests, the ball is dropped and repeated low tensile stresses are applied along the bonding interface or adhesive tile interface to generate repeated low impact energy, which Adhesion resistance or adhesion resistance resulting from peeling is determined. Therefore, it is a measurement of the adhesive bonding state under dynamic tensile stress conditions. This test can be performed under a variety of conditions to determine the properties of the specimen. Adhesion tests are specifically performed to comply with industry standards and customer specifications.

  In general, tensile bond strength tests for adhesives with cement bonding and shear strength tests for adhesives with resin dispersion and reaction are based on static test conditions. A well-reported problem is poor adhesion due to delamination, which causes the adhesive to be damaged by delamination of the tiled tissue within a certain period of time after installation. These early failures can have a significant cost impact.

  The quality of the tiled texture applies to various forms of stress in the adhesive layer, as well as the original adhesive bond state level, assuming that the adhesive is well applied and the tile is well placed. It depends on ability. The transverse deformation test is useful for classifying adhesives to determine the static flexibility to bending inherent in the adhesive. However, in the lateral deformation test, the adhesive performance with respect to adhesion to the tile layer and the affinity between the tile layer and the laid adhesive when a dynamic impact load is applied under main usage conditions such as traffic load. I do n’t know. As a result, poor adhesion is observed in the tiled structure even with adhesives and tile layers that meet industry standards. Early defects are observed even when quality control is strictly performed at the time of tile installation.

  Various other tests also only evaluate adhesive performance under static conditions, not dynamic conditions. There are simulations for flooding, thermal aging and freeze-thaw cycles, but they are exposed to environmental aging conditions. Water immersion and thermal aging other than freeze-thaw cycles can degrade the adhesive and generate significant interfacial stress between the tile and the laid adhesive.

  Therefore, by further strengthening, the test method and apparatus according to the present invention is an adhesive that better responds to the stress generated in the impact load body through evaluation from various types of adhesive materials as well as various conditions. Can be identified.

  The subject matter described in this specification is not limited to embodiments that overcome the disadvantages or that operate only in environments such as those described above. Rather, this background is only provided to illustrate one exemplary technology area in which some of the embodiments described herein may be implemented.

  One embodiment of the present invention is a method for testing the dynamic response and impact resistance of an adhesive material on a test piece, the test piece having a first side of the test piece on a second side of the test piece, The adhesive is used for lap joining, and the first surface is clamped to the apparatus for preparation. The method includes a step of periodically dropping a load body having a predetermined mass on a test piece from a predetermined height, a step of detecting a repeated value of the periodic drop, and a peeling failure of the test piece through a detection mechanism. A step of periodically dropping a load body having a predetermined mass onto a test piece from a predetermined height, receiving the load body by a conveyor mechanism, and releasing the load body from the predetermined height. A step of free-falling the test piece to the test piece, a step of collecting the load body by the conveyor mechanism, and a step of allowing the load body to freely fall from the height to the test piece until a peeling failure occurs. .

  Another embodiment of the present invention is an apparatus for testing the dynamic response and impact resistance of an adhesive material on a test piece, wherein the test piece is placed on the first side of the test piece on the second side of the test piece. The first surface is clamped and fixed to the apparatus. The apparatus includes a conveyor mechanism, a counting mechanism, a detection mechanism, and a conduit. The conveyor mechanism includes means for periodically dropping a load body having a predetermined mass from a predetermined height onto the test piece. The counting mechanism includes means for detecting the repeated value of the periodic drop. The detection mechanism includes a means for detecting a failure of peeling of the test piece, and the conduit includes a means for allowing the load body to freely drop from the height to the test piece until the failure of peeling occurs. The conveyor mechanism further includes means for receiving the load body, means for releasing the load body from a predetermined height and allowing it to freely fall on the test piece, and means for collecting the load body.

  The present invention comprises a combination of several novel features and parts described in detail below and illustrated in the accompanying drawings, and it will be understood that various changes in detail may be made without departing from the scope of the present invention. This can be done without sacrificing any effect of the invention.

  For a better understanding of the various aspects of some embodiments of the invention, a more detailed description of the invention will be given with reference to specific embodiments illustrated in the accompanying drawings. These drawings depict only typical embodiments of the invention and are therefore not intended to limit the scope of the invention. The invention will be described and explained with additional features and details through the use of the accompanying drawings in which:

Describes the mechanism of an apparatus for testing the dynamic response and impact resistance of an adhesive material on a specimen. An apparatus setup for testing the dynamic response and impact resistance of an adhesive material on a specimen is described. 6 is a flowchart illustrating a method for testing the dynamic response and impact resistance of an adhesive material on a test specimen. It is the flowchart explaining the method to drop the load body of a predetermined mass on a test piece from predetermined height. It is the flowchart explaining the method of collect | recovering a load body with a conveyor mechanism. It is a flowchart explaining the method to detect the adhesion failure of a test piece with a detection mechanism.

  Embodiments of the present invention relate to a method and apparatus for testing the dynamic response and impact resistance of adhesive materials. In the following, the specification describes the invention according to preferred embodiments of the invention. It should be understood, however, that only the preferred embodiments of the present invention have been described in order to facilitate the detailed description of the present invention and are assumed without departing from the scope of the appended claims.

  In the present invention, the dynamic response and impact resistance of the adhesive material are tested by lap joining the first surface of the test piece to the second surface of the test piece using different types of adhesives, and testing the first surface. A method and apparatus are described that can be clamped to the apparatus and tested.

  Reference is first made to FIGS. 1A and 1B. FIG. 1A describes the mechanism of the apparatus for testing the dynamic response and impact resistance of the adhesive material on the test piece, and FIG. 1B tests the dynamic response and impact resistance of the adhesive material on the test piece. Explains how to set up the device. The mechanism of the apparatus for testing the impact resistance of an adhesive material such as cement adhesive includes a conveyor mechanism (102), a conduit (104), a test piece (106), a detection mechanism (108), and a counting mechanism (110). including.

  This apparatus is driven by an AC gear motor (1), and the AC gear motor (1) uses a combination of electric energy and magnetic current. Therefore, as is seen in many engines, no fuel is required to operate the motor. The motor speed control device (9) controls the speed of the AC gear motor (1). The speed of the motor speed control device (9) varies depending on the average voltage supplied to the AC gear motor (1). This is easy for the user to understand because the voltage is automatically generated as pre-programmed and observed as the user observes only the average effect of speed.

  The programmable logic controller (2) is a microprocessor based system which is used to automate the electromechanical processing of the device. The programmable logic control device (2) makes it possible to control the operation of this device with a plurality of input / output configurations. The apparatus is operated using the start button (5), stop button (6), and reset button (7). When these buttons are pressed by the programmable logic control device (2) and the start button is pressed, the detection mechanism (108) continuously performs a test until it detects a peeling failure, and is programmed in advance to automatically end the operation. . Both the stop button (6) and the reset button (7) are for manual operation of the device. The entire test operation may be manually terminated by pressing the stop button (6) and the reset button (7).

  The counting mechanism (110) may be constituted by a digital counting device (8), and the device may be used to detect the count of dropped load bodies until a defective peeling is detected on the test piece. The need to use the reset button (7) arises when there is a need to restart the entire test. Pressing the reset button (7) will indicate that the test will be restarted, the digital counter (8) will automatically reset to a starting point that will be zero under most programmed conditions, and will count for drops throughout the following period. Repeat.

  The conduit (104) can be a conduit assembled perpendicular to the test strip (106), or the conduit (104) can be laterally inclined to provide a curved portion at the edge of the inclined conduit. May be. The conduit may comprise a transparent acrylic tube (10). A load body having a predetermined mass is dropped from a predetermined height onto the test piece (106) through the conduit (104). The mass and drop height of the drop load body are determined based on the type and thickness of the test piece (106). That is, by predetermining the mass or height, one of ordinary skill in the art can determine the mass or height appropriate for effective test parameters.

  The specimen (106) includes either ceramic or stone tiles that are subjected to normal dynamic or impact loads. A ceramic or stone tile specimen (106) is clamped to the device using a tile toggle clamp (3) attached to the device. The clamp fixing range of the tile toggle clamp (3) is limited. This prevents excessive force from being applied to the specimen, specifically the surface of the tile, but this is caused by external factors that are not impacted by the mass of the dropped load body. This is because there is a possibility.

  A test device detection mechanism (108) is incorporated in close proximity to the test specimen. The detection mechanism (108) may be constituted by an electronic trigger switch connected to the counting device, or an electronic counting reverse detection device, for example, a sensor with a built-in counting device. The detection mechanism (108) is connected to the programmable logic controller (2). A detection response is automatically generated by the programmable logic control device (2) when a peeling failure occurs. The programmable logic control device (2) receives a detection response from a detection mechanism such as a sensor, makes a decision according to a program stored in the control device, and processes the response. The programmable logic controller (2) then generates an automatic output to the test device to perform a specific function based on the application. The operation is terminated based on the output of the detection response generated when the peeling failure is detected. This test cycle is repeated continuously if the detection mechanism (108) does not detect a peeling failure.

  The conveyor mechanism (102) of the test apparatus is composed of a magnet (4) that lifts a drop load body, or a belt-type roller conveyor, a chain conveyor, or a robot arm conveyor that is desirable in the case of an up-down tilt situation. A steel object such as a ball bearing is effectively controlled by the magnetic conveyor (4) for lifting the drop load. Magnetic conveyors use magnets to perform the actions necessary to lift a drop load. When a drop load body, for example, a ball bearing is dropped from a predetermined height by a holder such as a ball bearing holder (11), the holder is held. The conveyor mechanism (102) may be substituted with a mechanical catch such as a pressure catch. Alternatively, the test apparatus is operated manually, and the drop load body is manually picked up after colliding with the test piece, and then the drop load body is dropped from a predetermined height under periodic conditions, and the same as described above. Test conditions may be obtained.

  Reference is now made to FIG. FIG. 2 is a flowchart illustrating a method for testing the dynamic response and impact resistance of an adhesive material on a test specimen. The dynamic response and impact resistance of the adhesive material on the specimen is prepared by lap joining the first side of the specimen to the second side of the specimen using an adhesive, the first side being the device A method (200) of clamping and fixing to a test method, wherein the method (200) includes a step (202) of periodically dropping a load body having a predetermined mass onto a test piece from a predetermined height, the periodic A step (204) of detecting a repeated value of dropping, and a step (206) of detecting a peeling failure of the test piece by a detection mechanism, and periodically dropping the load body having the predetermined mass onto the test piece from a predetermined height. In step (202), the load body is received by the conveyor mechanism (302), the load body from the predetermined height is released and freely dropped on the test piece (304), and the load body is received by the conveyor mechanism. Recovery step (30 ), To the peeling failure occurs, the step (308) to free allow falling load material from the height to the specimen, further comprising.

  The principle of this test method is to apply a tensile impact load to the test piece, specifically the tile adhesive and the adhesive surface, and simulate the load conditions that occur mainly from traffic such as foot and light vehicle movement. That is. This is performed by dropping the load body continuously on the back surface of the stretched lap-joined test piece until a defective peeling occurs and periodically applying an impact.

  This test is a way to determine the resistance of a tile layer bonded to a tile adhesive to debonding failure due to dynamic adhesive stress generated by continuous impact loads. This test includes two tiles and the back side of the first tile is lap bonded using a different adhesive on the top surface of the second tile. One of the exposed end portions of the first surface of the first tile is firmly clamped, and an impact load is applied to the other end portion. The energy resulting from the impact is calculated from the weight of the load body at a given height, and this height and mass is calculated for each tiled tissue based on the tile type, adhesive, and method of placing the test specimen in the test equipment. Stipulate. The impact energy generated on the back surface of the exposed end of the lap bonded test piece results in a dynamic bond stress between the tile and the bond interface. Not only the performance of the adhesive type but also the robustness of the test piece can be determined by the number of periodic impacts caused by a continuous load drop that causes a peeling failure.

  Next, FIGS. 3 and 4 will be collectively referred to. FIG. 3 is a flowchart illustrating a method of dropping a load body having a predetermined mass from a predetermined height onto a test piece joined with an adhesive. FIG. 4 is a flowchart illustrating a method for recovering a load body using a conveyor mechanism. The step of dropping a load body having a predetermined mass from a predetermined height includes a step (302) of receiving the load body by a conveyor mechanism. Thereafter, the load body is released from a predetermined height and freely dropped onto the test piece (304). The dropped load body is recovered by a conveyor mechanism (306). The dropped load body is allowed to fall freely from a predetermined height onto the test piece until a peeling failure is detected on the test piece (308). Drop load bodies colliding with the test piece joined with the adhesive are collected (402) and automatically conveyed onto the conveyor mechanism (404).

  Reference is now made to FIG. FIG. 5 is a flowchart for explaining a method for detecting an adhesion failure of a test piece by a detection mechanism. The detection mechanism detects the poor adhesion of the test piece joined with the adhesive as an effect caused by dropping the load body continuously and repeatedly over a period. The detection mechanism includes an electronic trigger switch or sensor that senses and verifies the state of the test piece bonded with the adhesive (502). The drop test is terminated (506), the number of cyclic repetitions of the load body drop is recorded, and the defective point of the test piece is determined when an adhesion failure is observed with the test piece joined with the adhesive (508). .

  The quality of the test piece, specifically the tiled structure, is good not only in the initial adhesive bonding level, but also in a state where the adhesive is well spread without any chipping, and the tile is good depending on the type of tile of the test piece It depends on the ability of the adhesive layer to cope with various stresses when placed on the surface.

  Such test devices and methods are useful in evaluating the compatibility between the laid adhesive and the tile layer. It is known that poor peeling can occur due to poor compatibility between the layers of the first and second surfaces of the tile and is commonly found in the structure of a laminated structure. The approach employed in the present invention is much easier to determine the quality and robustness of various types of adhesives. In addition, electric devices are a preferred alternative to fuel engines because electric devices are clean and less expensive to operate.

  The present invention may be embodied in other specific forms without departing from the basic characteristics thereof. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of equivalency of the claims are to be embraced within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 AC gear motor 2 Programmable logic control device 3 Tile toggle clamp 4 Magnetic conveyor 5 Start button 6 Stop button 7 Reset button 8 Digital counting device 9 Motor speed control device 10 Transparent acrylic pipe 11 Ball bearing holder 102 Conveyor mechanism 104 Conduit 106 Test piece 108 Detecting mechanism 110 Counting mechanism

Claims (12)

A method (200) for testing the dynamic response and impact resistance of an adhesive material on a test piece, wherein the test piece is used with an adhesive on the first side of the test piece and the second side of the test piece. Wherein the first surface is clamped to the device and prepared, the method (200) comprising:
Periodically dropping a load body having a predetermined mass from a predetermined height onto a test piece (202);
Detecting the repetition value of the periodic drop (204);
A step (206) of detecting a peeling failure of the specimen by a detection mechanism
Including
In the step (202) of periodically dropping the load body of the predetermined mass from the predetermined height onto the test piece,
Receiving the load by a conveyor mechanism (302);
Releasing the load from the predetermined height and allowing it to fall freely onto the specimen (304);
Recovering the load body by the conveyor mechanism (306);
Enabling the load body to fall freely from the height onto the test piece until the separation failure occurs (308)
And further comprising: In the step (206) of recovering the load body by a conveyor mechanism,
Collecting the load body that has collided with the specimen (402);
Sending the load body back to the conveyor mechanism (404);
The method of claim 1, further comprising: In the step (208) of detecting the peeling failure of the test piece by the detection mechanism,
Verifying the specimen (502);
When the peeling failure is observed on the test piece,
Ending the periodic drop (506);
Recording the repetition value to determine a defective point (508)
The method of claim 1, further comprising:   The method of claim 1, wherein detecting (202) the repeated value of the periodic drop further comprises incrementing the repeated value until the failure to peel occurs.   The method of claim 1, wherein the conveyor mechanism (102) comprises a magnetic conveyor, a belt roller conveyor, a chain conveyor or a mechanical catch that is desirable in an up-down tilt situation.   The detection mechanism (108) incorporated in the vicinity of the test piece is composed of an electromagnetic sensor such as an electronic trigger switch connected to a counter, or an electronic counter reverse detector such as a sensor with a built-in counter. The method according to claim 1. An apparatus (100) for testing the dynamic response and impact resistance of an adhesive material on a test piece (106), wherein the test piece (106) is the first side of the test piece (106). The device (100) is prepared by lap-joining the second surface using the adhesive and clamping the first surface to the device (100). The device (100) includes:
Conveyor mechanism (102),
Counting mechanism (110),
Detection mechanism (108),
A conduit (104),
The conveyor mechanism (102) includes means for periodically dropping a load body having a predetermined mass from the predetermined height onto the test piece (106),
The counting mechanism (110) includes means for detecting a repetition value of the periodic drop,
The detection mechanism (108) includes means for detecting defective peeling of the test piece (106),
The conduit (104) includes means for allowing the load body to freely fall from the height to the test piece (106) until the peeling failure occurs,
The conveyor mechanism (102) includes
Means for receiving the load,
Means for releasing the load body from the predetermined height and allowing it to freely fall on the test piece (106);
The apparatus further includes means for recovering the load body. The conveyor mechanism (102) includes
Means for collecting the load bodies that have collided with the specimen (106);
The apparatus according to claim 7, further comprising means for sending the load body back to the conveyor mechanism (102). The detection mechanism (108) includes:
Means for verifying the specimen (106);
When the peeling failure is observed on the test piece (106),
Means for terminating the periodic drop;
The apparatus according to claim 7, further comprising means for recording the repetition value and determining a defective point.   The apparatus of claim 7, wherein the counting mechanism (110) further comprises means for incrementing the repeat value until the failure to peel occurs.   8. The apparatus of claim 7, wherein the conveyor mechanism (102) comprises a magnetic conveyor, a belt roller conveyor, a chain conveyor, or a mechanical catch that is desirable in an up-and-down tilt situation.   The detection mechanism (108) incorporated in the vicinity of the test piece is composed of an electromagnetic sensor such as an electronic trigger switch connected to a counter, or an electronic counter reverse detector such as a sensor with a built-in counter. The apparatus according to claim 7.

Images