GB2443530A - Method for testing the surface quality of a substrate - Google Patents
Method for testing the surface quality of a substrate Download PDFInfo
- Publication number
- GB2443530A GB2443530A GB0721068A GB0721068A GB2443530A GB 2443530 A GB2443530 A GB 2443530A GB 0721068 A GB0721068 A GB 0721068A GB 0721068 A GB0721068 A GB 0721068A GB 2443530 A GB2443530 A GB 2443530A
- Authority
- GB
- United Kingdom
- Prior art keywords
- brush
- coated
- substrate
- fibres
- uncoated substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 238000005299 abrasion Methods 0.000 claims abstract description 11
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims description 57
- 239000011248 coating agent Substances 0.000 claims description 47
- 230000009471 action Effects 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 2
- 230000001143 conditioned effect Effects 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 230000004580 weight loss Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 22
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003082 abrasive agent Substances 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000004922 lacquer Substances 0.000 description 3
- 238000005201 scrubbing Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 208000016261 weight loss Diseases 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/08—Detecting presence of flaws or irregularities
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/57—Measuring gloss
Landscapes
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
An apparatus and method for testing the surface quality of a coated 5 or uncoated substrate 7, in which fibres 3 of a brush 1 are pressed with a predetermined force e.g. by a spring 9 against the substrate and the brush rotates 15 about a rotation shaft 11 arranged perpendicularly to the substrate surface. At the same time is the brush is moved parallel to the substrate surface for a predetermined duration following which it is established, e.g. by determining gloss reduction or weight of material removed, whether a surface inhomogeniety exists that can be attributed to deformation or abrasion. The brush may be driven by a motor 13 moved along a rail 17. The pressing force may increase with longitudinal movement to provide a damage gradient. The brush may be plate shaped and mounted centrally or eccentrically on the shaft. The bristles may be of synthetic material e.g. metal wire or plastics such as PE, PP or PVC.
Description
DESCRI PT ION Title
Method and apparatus for testing the surface quality of coated or uncoated substrates
Prior Art
The present invention relates to a method and an apparatus for testing the surface quality of coated or uncoated substrates.
The surface quality of coated or uncoated substrates depends inter alia on their scratch resistance and abrasion resistance. This provides a measure of the ability of the surface of the coated or uncoated substrate to withstand the harmful action of abrasive materials, such as for example dirt, grit, sand, but also brushing etc., as well as deformations caused by scratches. For example coatings employed for external use suffer from such damage. Such coatings include for example automobile lacquers and paints.
An example of a type of damage experienced in practice are scratches, which can be caused by a combination of brushing and dirt in a car wash unit. The physical background to the formation of these scratches is extremely complex and has not yet been fully clarified. Factors influencing the formation of scratches may for example include elastic properties, cohesive forces, hardness, etc. of the coatings.
On account of the large number of influencing factors there is at the present time no method that can provide unambiguous, meaningful physical characteristic values.
Currently attempts are simply made to simulate the stresses encountered in practice. This is carried out for example using the Taber abrasion machine described in DIN 53754.
For this purpose a surface to be tested is stressed by rotating abrasion rollers that exert a defined force on the surface. After a defined test time *the reduction in weight is measured. This provides a measure of the abrasion resistance.
It is furthermore known for example from DIN EN ISO 11998 to test the wear resistance of dispersion paints. For this purpose the surface to be tested is moistened and subjected by horizontal movements of a scrubbing brush to a defined application force. The number of cycles until damage occurs is measured.
In order to test the scrubbing brush resistance of vehicle lacquers and paints, wash cycles in car wash units are simulated, in which test plates are subjected to brushes rotating in the opposite direction to the movement of the substrate, while simultaneously spraying with aqueous quartz sand slurries. The evaluation is carried out by measuring the decrease in the gloss.
In addition a large number of further different types of methods are known, in which various materials are drawn under a predetermined pressing force periodically over the surface to be tested.
The disadvantage of the currently used methods is that the samples after having undergone the test agent have to be prepared for the measurement procedure. These preparation steps include for example drying, cleaning or removal of sand. A further disadvantage is that the abrasive materials can wear out or become contaminated with abrasion products. For this reason the results for example of an abrasion test using sandpaper can become falsified after just a few tests. It is however expensive to have to constantly replace the sandpaper. Current methods are therefore difficult to automate and are not suitable for a large number of surfaces to be tested.
Disclosure of the Invention
Advantages of the Invention The method according to the invention for testing the surface quality of coated or uncoated substrates includes the following steps: (a) Pressing a brush with a predetermined pressing force against the coated or uncoated surface, (b) Rotating the brush about a rotation shaft arranged perpendicularly to the surface of the coated or uncoated substrate, and at the same time moving the brush parallel to the surface of the coated or uncoated substrate for a predetermined application time, (c) Determining whether a surface inhomogeniety exists, which can be attributed to deformation or abrasion.
The advantage of the use of a brush that is pressed with a predetermined pressing force against the coated or uncoated substrate is that no, or only a very small, cleaning effort is necessary, and a rapid, process-reliable automatic replacement of samples is possible. The method according to the invention can accordingly also be automated.
Due to the simultaneous movement of the brush by rotation about a rotation shaft arranged perpendicularly to the surface of the coated or uncoated substrate, and the simultaneous movement of the brush parallel to the surface of the coated or uncoated substrate, a uniform damage of the surface occurs.
In order to obtain comparable results, the application time is for example determined by the number of rotations of the brush or the number of movements of the brush parallel to the surface.
In a preferred embodiment the pressing force of the brush is varied with the longitudinal movement parallel to the * surface of the coated or uncoated substrate, so that a damage gradient is built up, which can be analysed in a position-dependent manner. In this way it is possible to investigate the scratch resistance of the coated or uncoated substrate under different loads during a test cycle.
The abrasion properties of the surface can be determined for example by measuring the decrease in weight of the substrate arid/or by measuring the decrease in gloss. To measure the decrease in weight it is simply necessary to weigh the coated or uncoated substrate before being subjected to the action of the brush, and afterwards. This can be fully automated, so that the whole process can be carried out automatically. Also, to measure the decrease in gloss a measurement is made before and after the substrate is subjected to the action of the brush. To measure the decrease in gloss any conventional method known to the person skilled in the art can be employed. Also, in evaluating the surface quality by measuring the decrease in gloss, the process according to the invention can be carried out fully automatically. In this way a high throughput is possible and also a large number of substrates can be tested in a simple manner.
In order that the test conditions are identical in each case, it is preferred to clean the brush before it is pressed against the surface of the coated or uncoated substrate. By means of this cleaning procedure abraded material for example, which can accumulate in the brush, is removed. The brush can be cleaned for example by blowing, suction and/or by tapping. In contrast to the abrasive materials which are known from the prior art, for example sandpaper, it is accordingly easy to remove the abraded material and to carry out successive tests in each case under identical conditions. A falsification of the measurement results due to contamination of the brushes by for example abraded material or dust is avoided.
The nature and the severity of the damage to the surface of the coated or uncoated substrate can be controlled by the choice of the material of the brush fibres or bristles of the brush. When choosing the brush fibre material a good reproducibility of the material properties should be aimed for. Synthetic fibres are for this reason more suitable than natural fibres. Synthetic fibres are therefore preferably used as brush fibres. Suitable materials for the synthetic fibres include for example steel wire, copper wire, brass wire, or plastics materials such as polyethylene, polypropylene and polyvinyl chloride.
In order to be able to reproduce the results of the method for testing the surface quality, in particular brush fibre materials which tend to wear out have to be conditioned (treated) by for example rounding of the fibre ends. In the conditioning the brush fibres are treated until they no longer undergo any change. The conditioning can be carried out for example by abrading the brush fibres on a metal substrate until the fibre ends are rounded and no longer undergo any change.
P further advantage of the method according to the invention is that the brush fibres can be matched to the coatings to be tested. Thus, it is possible for example with coatings of a relatively resistant material to use brush fibres that are made of a hard material, and in the case of a less resistant material of the coating, to use brush fibres that are softer.
Another advantage of the method according to the invention is also the fact that the results are comparable to results obtained by standard methods that involve subjecting the sample to brushing. Such standard methods are for example those used to test the scrubbing resistance or to simulate lines of wash jets.
The invention furthermore relates to an apparatus for carrying out the method, comprising a brush that can be pressed with a predetermined, variable pressing force against a coated or uncoated substrate and which can rotate about a rotation shaft and can be displaced parallel to the surface of the coated or uncoated substrate.
In order to ensure a high reproducibility of the results, the brush fibres are preferably made of a synthetic material. The rotation shaft about which the brush rotates when acting on the surface of the surface of the coated or uncoated substrate can be arranged at the mid-point of the brush or also outside the mid-point of the brush. The advantage of the centric rotation shaft is that a uniform scratch pattern is produced. However, a different pattern of damage is produced in the centre and at the edge of the brush track. With an eccentric rotation shaft several scratch directions overlap. A more uniform damage over the width of the brush track is thereby produced.
In one embodiment the apparatus includes means by means of which the pressing force of the brush can be varied during the longitudinal movement parallel to the surface of the coated or uricoated substrate, in order to build up a damage gradient. In this way it is possible with the apparatus to carry out an investigation in which the resistance of the surface can be tested at different loads in a single experiment.
Brief Description of the Drawipg
Embodiments of the invention are illustrated in the drawing and discussed in more detail in the following description.
The single Figure is a diagrammatic illustration of the method according to the invention.
Embodiments of the Invention An apparatus for carrying out the method according to the invention is illustrated diagrammatically in the single Figure.
An apparatus designed according to the invention for testing the scratch resistance of coatings includes a brush 1, which is provided with brush fibres 3. The brush 1 is pressed with the brush fibres 3 against a coating 5 whose surface quality is to be tested. For this purpose the coating 5 is applied to a substrate 7.
Alternatively, it is also possible with the method according to the invention to test the surface of an uncoated substrate.
The brush 1 is preferably a flat plate-shaped brush. The brush fibres are determined by their material, their hardness, the diameter of the individual brush fibres, and their number and length. The brush fibres 5 are preferably made of a synthetic material, since a better reproducibility can be ensured with a synthetic material than with natural materials. Suitable materials for the brush fibres are for example steel wire, copper wire, brass wire, or plastics such as polyethylene, polypropylene and polyvinyl chloride. A preferred material for the brush fibres is metal wire.
The hardness of the brush fibres depends on the coating to be tested. Preferably in the case of coatings of a more resistant material, a harder material for the brush fibres is used, while with coatings of a less resistant material softer brush fibres are used. The fibre diameter of the brush fibres is preferably in the range from 0.1 to 1 mm.
In this connection the fibre diameter influences the stiffness of the brush fibres and therefore the severity of the damage. Thus, hard but thin fibres wear out less rapidly, but possibly exhibit less damage than soft, thick fibres. The length of the brush fibres is preferably in the range from 5 to 40 mm.
The properties of the brush fibres, i.e. the material, the hardness, the fibre diameter, the number and length of the fibres, depend in each case on the coating to be tested.
Thus, for example, when testing paints and lacquers, such are used in vehicle paintwork, brush fibres are used for example that a made of brass, copper or polyamide, and which have a fibre diameter in the range from 0.1 to 0.5 mm and a length of 5 to 20 mm.
In order to be able to test reproducibly the surface quality of the coating 5, the substrate 7 with the coating 5 is pressed with a defined force against the fibres 3 of the brush 1. The pressing force is adjusted for example by weights or a spring. In the embodiment illustrated here the pressing force is applied to the substrate by a spring element 9. Any suitable compression spring known to the person skilled in the art can be used as spring element 9. Suitable compression springs are for example coil springs or cup springs.
In addition to pressing the substrate 7 with the coating 5 against the brush fibres 3 of the brush 1, it is also possible to apply the pressing force to the brush 1. For *this purpose the substrate 7 is preferably arranged on a solid support, while the brush 1 with the fibres 3 is pressed against the coating 5 on the substrate 7.
In order to exert the necessary force on the coating 5, the brush 1 is connected to a rotation shaft 11. The rotation shaft 11 is driven by a motor 13. The motor 13 is preferably an electric motor having an adjustable drive.
The rotational speed and therefore the rotational velocity of the brush 1 can be adjusted by means of the adjustable drive. Preferably the rotational speed can be regulated continuously. The rotational movement of the rotation shaft 11, which is connected to the brush 1, is indicated by an arrow 15.
In the embodiment illustrated here the rotation shaft 11 is arranged in the mid-point of the brush. Alternatively, it is however also possible to arrange the rotation shaft 11 outside the mid-point of the brush. In this case an eccentric rotational movement of the brush 1 is produced.
In order to achieve a loading of the coating 5 in two directions, in the embodiment illustrated here the motor 15, which is connected to the brush 1 via the rotation shaft 11, can be displaced parallel to the surface of the coating 5. In the embodiment illustrated here, for this purpose a rail 17 is arranged parallel to the coating 5.
The motor 13 is displaceable on the rail 17. The movement of the motor 13 is indicated by a double arrow 19.
In order to achieve a reproducible movement of the motor, a drive is preferably installed on this, by means of which the motor can move along the rail 17. The drive for the motor (not shown in the Figure) can preferably be regulated. For this purpose a control unit is arranged for example in the housing of the motor 13. The control unit may however also be arranged outside the motor housing.
The rotational movement of the brush 1 is preferably also controlled by the control unit.
In order to carry out the method for testing the scratch resistance of coatings, it is possible to introduce the substrate 7 with the coating 5 applied thereon, manually into the apparatus. In order however to test a large number of different coatings 5, it is preferred if the substrate 7 together with the coating 5 formed thereon is introduced in an automated manner into the apparatus. In order to test the surface quality of the coating, it is necessary to investigate the state of the coating 5 before it is introduced into the apparatus and is subjected to the action of the brush fibres 3 of the brush 1. If the surface quality is to be evaluated on the basis of the weight loss of the coating 5, the substrate 7 together with the coating 5 is weighed before it is introduced into the apparatus for the testing. The weighing of the substrate 7 together with the coating 5 can in this connection be carried out either manually or completely automatically.
If the surface quality of the coating 5 is to be evaluated by the reduction in gloss of the coating 5, then the gloss of the coating 5 is measured before the substrate together with the coating 5 is introduced into the apparatus. The gloss can be measured by any suitable method for measuring gloss known to the person skilled in the art.
After the evaluation of the surface quality before the substrate and coating are subjected to the action of the apparatus according to the invention, the substrate 7 together with the coating 5 is introduced into the apparatus. In the apparatus the substrate 7 together with the coating 5 is pressed with a predetermined pressing force against the brush fibres 3 of the brush 1, the brush 1 being mounted so that a movement of the brush perpendicular to the surface of the coating 5 is not possible. The necessary pressing force can be exerted for example by a spring element 9, which acts on the substrate 7. It is also possible to press the substrate 7 together with the coating 5 for example by means of weights against the brush fibres 3 of the brush 1. Alternatively, it is also possible to fix the substrate 7 with the coating 5 so that this cannot move perpendicularly to the surface of the coating 5. In this case the pressing force is exerted by the brush 1 on the coating 5. For this purpose it is possible for example to move the rail 7, on which the motor 13 is secured, with a defined force in the direction of the substrate 7. The force on the rail 17 can in this case also be exerted by spring elements or by weights, or also by any other method known to the person skilled in the art.
In addition it is also possible to mount the housing of the motor 13 on the rail 17 so that the housing 13 can be moved perpendicularly to the rail 17. In this case it is sufficient if the necessary pressing force is exerted on the housing of the motor 13. Furthermore, it is also possible for the motor 13 to contain a device by means of which the rotation shaft 11 can be pressed with the predetermined pressing force in the direction of the coating 5. The pressing force can then for example be exerted by means of a toothed rack or a thread on the rotation shaft 11. The coating 5 is subjected to this pressing force by rotation of the brush 1 and a movement of the brush 1 parallel to the surface of the coating 5. The rotational movement of the brush 1 can in this connection start before the pressing force has been exerted, or simultaneously with the exertion of the pressing force, or alternatively the pressing force can first of all be exerted, followed by the rotational movement of the brush 1. Preferably the pressing force is exerted while the brush 1 is rotating. However, no measurements, for example a measurement of the loss of gloss, should be carried out in the application stage and in the lifting stage. After a predetermined duration or after a predetermined number of rotational movements of the brush 1 or a predetermined number of movements of the brush 1 parallel to the surface of the coating 5, the substrate together with the coating 5 is removed. For this purpose it is possible first of all to terminate the movement of the brush 1 and to release the pressing force. Alternatively, it is however also possible to continue the movement of the brush 1 and only discontinue the pressing force with which the substrate 7 together with the coating 5 is pressed against the brush fibres 3.
After the pressing force has been lifted, the substrate 7 together with the coating 5 is removed. The removal can in this connection, like the introduction, be carried out automatically or manually. After the removal of the substrate 7 together with the coating 5, the substrate 7 with the coating 5 is re-weighed, or the gloss of the coating 5 is measured again. The values measured after the action of the brush 1 are compared with the previously measured values. In this connection it is possible either to measure the loss of weight of the coating 5 or the change in gloss of the coating 5, or alternatively to measure both of the loss in weight and also the change in gloss.
Due to the fact that in the apparatus the coating 5 is subjected in each case to the same pressing force and the same action time, the measured results can be compared with one another.
Claims (14)
- Patent Claims 1. Method for testing the surface quality of a coated oruncoated substrate (7), which includes the following steps: (a) Pressing brush fibres (3) of a brush (1) with a predetermined pressing force against the coated or uricoated substrate (7), (b) Rotating the brush (1) about a rotation shaft (11) arranged perpendicularly to the surface of the coated or uncoated substrate, and at the same time moving the brush (1) parallel to the surface of the coated or uncoated substrate for a predetermined application time, (c) Determining whether a surface inhomogeniety exists, which can be attributed to deformation or abrasion.
- 2. Method according to claim 1, characterised in that the action duration is determined by the number of rotations of the brush (1) or by the number of movements of the brush (1) parallel to the surface.
- 3. Method according to claim 1 or 2, characterised in that the abrasion properties of the surface of the coated or uncoated substrate (7) are determined by measuring the weight loss of the coated or uncoated substrate (7) and/or by measuring the reduction in gloss.
- 4. Method according to one of claims 1 to 3, characterised in that the brush fibres (3) of the brush (1) are cleaned before being pressed against the surface of the coated or uncoated substrate (7)
- 5. Method according to claim 4, characterised in that the brush fibres (3) are cleaned by blowing, suction and/or tapping.
- 6. Method according to one of claims 1 to 5, characterised in that the brush fibres (3) of the brush (1) are conditioned before a first surface of a coated or uncoated substrate (7) is subjected to the action of the brush fibres (3)
- 7. Method according to one of claims 1 to 6, characterised in that the pressing force of the brush (1) is varied with the longitudinal movement parallel to the surface of the coated or uncoated substrate (7) so that a damage gradient is built up, which can be analysed depending on the site.
- 8. Apparatus for carrying out the method according to one of claims 1 to 7, comprising a brush (1) with brush fibres (3), which apparatus can be pressed with a predetermined pressing force against a coating (5) on a substrate (7) and which can rotate about a rotation shaft (11) and can be displaced parallel to the surface of the coating (5)
- 9. Apparatus according to claim 8, characterised in that the brush fibres (3) of the brush (1) are made of a synthetic material.
- 10. Apparatus according to claim 8 or 9, characterised in that the rotation shaft (11) is mounted in the mid-point of the brush.
- 11. Apparatus according to claim 8 or 9, characterised in that the rotation shaft (11) is mounted outside the mid-point of the brush.
- 12. Apparatus according to one of claims 8 to 11, characterised in that the apparatus includes means by means of which the pressing force of the brush (1) can be varied during the longitudinal movement parallel to the surface of the coated or uncoated substrate (7), in order to build up a damage gradient.
- 13. A method for testing the surface quality of a coated or uncoated substrate substantially as herein described.
- 14. An apparatus for testing the surface quality of a coated or uncoated substrate substantially as herein described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006051314A DE102006051314A1 (en) | 2006-10-31 | 2006-10-31 | Method and device for checking the surface quality of coated or uncoated substrates |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0721068D0 GB0721068D0 (en) | 2007-12-05 |
| GB2443530A true GB2443530A (en) | 2008-05-07 |
| GB2443530B GB2443530B (en) | 2012-05-09 |
Family
ID=38830026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0721068.5A Expired - Fee Related GB2443530B (en) | 2006-10-31 | 2007-10-26 | Method and apparatus for testing the surface quality of coated or uncoated substrates |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102006051314A1 (en) |
| GB (1) | GB2443530B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768157A (en) * | 2012-07-03 | 2012-11-07 | 东莞劲胜精密组件股份有限公司 | A kind of paper tape friction test method of paint film |
| EP2420817B1 (en) | 2010-06-16 | 2015-04-08 | Robert Bosch GmbH | Test device for testing the quality of a paint or varnish layer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406875A (en) * | 2014-12-25 | 2015-03-11 | 广电计量检测（天津）有限公司 | Water feeding anti-abrasion testing system |
| CN115876688B (en) * | 2022-12-23 | 2025-10-31 | 蓝鲸科技(深圳)有限公司 | Coating bonding strength detection method and sample brushing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537059A (en) * | 1983-08-12 | 1985-08-27 | Advanced Micro Devices, Inc. | Automatic brushing machine |
| JP2000074807A (en) * | 1998-08-28 | 2000-03-14 | Mazda Motor Corp | Paint film scratching test method and test device |
-
2006
- 2006-10-31 DE DE102006051314A patent/DE102006051314A1/en not_active Withdrawn
-
2007
- 2007-10-26 GB GB0721068.5A patent/GB2443530B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537059A (en) * | 1983-08-12 | 1985-08-27 | Advanced Micro Devices, Inc. | Automatic brushing machine |
| JP2000074807A (en) * | 1998-08-28 | 2000-03-14 | Mazda Motor Corp | Paint film scratching test method and test device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2420817B1 (en) | 2010-06-16 | 2015-04-08 | Robert Bosch GmbH | Test device for testing the quality of a paint or varnish layer |
| EP2420817B2 (en) † | 2010-06-16 | 2018-07-25 | Robert Bosch GmbH | Test device for testing the quality of a paint or varnish layer |
| CN102768157A (en) * | 2012-07-03 | 2012-11-07 | 东莞劲胜精密组件股份有限公司 | A kind of paper tape friction test method of paint film |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006051314A1 (en) | 2008-05-08 |
| GB0721068D0 (en) | 2007-12-05 |
| GB2443530B (en) | 2012-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7018938B2 (en) | A device for measuring rubber wear | |
| US6494765B2 (en) | Method and apparatus for controlled polishing | |
| US6412330B1 (en) | Abrasion tester | |
| US7997118B2 (en) | Scrub testing devices and methods | |
| KR101710332B1 (en) | Apparatus for testing of steel plate surface friction | |
| AU2017296469B2 (en) | Method for evaluating wear resistance of rubber | |
| KR20080113508A (en) | Abrasion test device for plastic surface for vehicle interior | |
| GB2443530A (en) | Method for testing the surface quality of a substrate | |
| US4958511A (en) | Method and apparatus for wear testing anodized surfaces | |
| JP2008185475A (en) | Rubber abrasion tester, and abrasion testing method of rubber for tire tread using it | |
| Osterhold et al. | Methods for characterizing the mar resistance | |
| US5703284A (en) | Device for testing non-uniform wear on tread strips of pneumatic vehicle tires | |
| US8991244B2 (en) | Testing device for checking the quality of a paint or lacquer layer | |
| CN111208028A (en) | Tester and method for detecting environmental suitability of optical glass | |
| JP3706637B2 (en) | Viscoelastic body wear test equipment | |
| KR20060038279A (en) | Wear Evaluation System of Tire Tread Rubber Specimen | |
| US5101655A (en) | Apparatus and method for weatherstrip wear testing | |
| Cambruzzi et al. | Reduction on protective properties of organic coatings produced by abrasive particles | |
| RU2303773C1 (en) | Method of determining durability of coatings | |
| CN107328676B (en) | Test method for resistance to soft injury | |
| CN116223274B (en) | A device and method for evaluating the wear resistance of relatively low hardness metal materials | |
| CN119198421A (en) | A test device and evaluation method for wear resistance of steel plates | |
| JPH01292232A (en) | Frictional and wear tester | |
| CN218956399U (en) | Instrument for measuring agricultural product ingredients through spectrum | |
| CN217688124U (en) | Spectrum and metallographic specimen rapid sample grinding machine tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20170817 AND 20170823 |
|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20181026 |