JP3008119B2 - Abrasive cloth paper - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abrasive cloth paper, and more particularly, to an abrasive cloth paper suitable for grinding wood, painted surface, plastic, hard rubber and the like.

(Prior art) Conventionally, this type of abrasive cloth is in a state close to close-packed mainly with arandom abrasive grains or silicon carbide abrasive grains (hereinafter also referred to as general abrasive grains) on a substrate such as cloth or paper. It is constituted by being fixed at random.

(Problems to be Solved by the Invention) However, when attempting to grind a material (hereinafter also referred to as a work) such as wood, a painted surface, plastic, and hard rubber with a conventional abrasive cloth, the abrasive grains are most dense as described above. Since the state is close to filling, the normal force (pressing force) applied to the working surface of the work must be increased. However, when grinding is performed with a large normal force, the cutting edges of the abrasive grains are quickly worn out and worn, and the abrasive cloth slips on the working surface of the work, and the grinding force is significantly reduced. As a result, the processing accuracy of the work is deteriorated, resulting in dimensional defects and the like. Further, the abrasive cloth slips on the working surface of the work, causing clogging due to heat generation, and further has a drawback that the work is scorched.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the abrasive cloth paper of the present invention is mainly composed of an alundum-based or silicon carbide-based abrasive having a particle size of about 5 to about 400 μm. Abrasive grains that are fixed in the form of dot or linear particles on the base material at about 3.5 to about 28% of the number of particles per unit area that can be densely packed with one layer, and constitute each particle in the case of dots The number is set in the range of 2 to 1900, and in the case of linear particle mass, the width of the line is more than twice the abrasive particle size
It is configured by setting it to 60 times or less.

(Effect) In the abrasive cloth of the present invention, the abrasive grains having a particle size of about 5 to about 400 μm, which are mainly alundum-based or silicon carbide-based abrasive grains, that is, general abrasive grains, have a grain number per unit area of about 3.
It is fixed at 5 to about 28%, and by setting the number of grains in such a range, the cutting edge of the abrasive grains does not wear out and wears out at an early stage. The normal force per abrasive grain required for grinding can be increased, and the tangential resistance, that is, the reaction force in the tangential direction to the working surface of the work can be reduced. In addition, by adopting a configuration in which the general abrasive grains are fixed in a dot-like or linear particle mass, the general abrasive grains can be easily and precisely arranged at the above-mentioned particle size prior to fixing, and over the entire surface of the polishing cloth paper. An arrangement with no unevenness is possible.

(Example) Next, an example of the present invention will be described with reference to the drawings.

First, an abrasive cloth according to a first embodiment of the present invention will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a base material such as cloth paper, and a plurality of dot-like particle masses 2 to 2 mainly composed of alundum-based or silicon carbide-based abrasive particles (general abrasive particles) are formed on the upper surface of the base material 1. It is fixed. The particle agglomerates 2 to 2 are arranged at equal intervals, and the particle diameter and the number per 100 cm ² of the individual abrasive grains constituting these are selected from the combinations shown in Table 1 below.

Here, the minimum value and the maximum value of the number of abrasive grains (particles / 100 cm ² ) at each particle size are the number of abrasive particles (particles / 100
cm ² ) of 3.5% and 28%, respectively.

FIG. 1 is a photograph of a general abrasive grain having a particle diameter of 160 μm and a number of particles of 770/100 cm ² fixed in a dot state on a substrate at a magnification of 4.5. The average number of abrasive grains constituting the lump is 9.5.

In addition, as general abrasive grains, in addition to those shown in the above table, 5 to 5
Any particle size can be used as long as it has a particle size of 400 μm, and the number of abrasive grains (particles / 100 cm ² ) is 3.5% and 28% when one layer is closest packed, as described above. % Range.

In addition, when the particles are arranged in a dot state as in the present embodiment, the number of abrasive grains constituting each particle cluster 2 is at least 2 or more, and the maximum number is selected as shown in Table 2 below according to the particle diameter. Is preferred.

The abrasive cloth paper of the present embodiment is mainly composed of alundum-based or silicon carbide-based abrasive grains (general abrasive grains) having a particle size of 5 to 400 μm, and the number of grains per unit area is 3.5% of the number of grains in the closest packing in one layer.
And 28% of the particles adhere to the substrate 1, without causing early wear and wear of the cutting edge of the abrasive grains, and the abrasive grains per particle required for grinding wood, painted surfaces, plastics and hard rubber, etc. Since the normal force can be increased, the grinding force can be improved, and the clogging of the polishing cloth due to heat generation can be prevented, so that the processing accuracy of the work can be improved, and further, the work can be prevented from being burnt due to heat. In addition, since the tangential resistance to the work is reduced, the detachment of the abrasive grains from the base material 1 can be prevented.

Further, in the present embodiment, the general abrasive grains are fixed to the base material 1 in the form of dot-shaped particle masses 2 to 2, and the dot-shaped particle masses 2 to 2 are bonded to the base material 1. A method in which the agent is applied in a corresponding dot shape using a jig and a general abrasive is adhered thereto using gravity or static electricity, or an adhesive is applied to the entire surface of the substrate 1 and the general abrasive is applied thereto. Can be adhered in a dot shape using gravity or static electricity, or a method in which a mixture of an adhesive and general abrasive grains is applied to the substrate 1 in a dot shape, or the like. For this reason, since the interval between the particle agglomerates 2 and 2 and the size of the particle agglomerate 2 itself can be accurately set with a very small size, the setting of the number of particles per unit area becomes easy. Since a state in which the particles are uniformly and uniformly dispersed on the substrate 1 can be easily obtained, accurate grinding can be performed.

In the actual work, an optimum one of the particle diameter and the number of particles is selected according to the kind of the work (material, hardness, density, etc.) and grinding conditions.

Further, the abrasive cloth of this embodiment may be in any form such as a sheet, a disk, a belt and the like.

Next, the abrasive cloth paper according to the second and third embodiments of the present invention will be described with reference to FIGS. 2 and 3, respectively. In addition, these examples are the same as those of the first embodiment except that the arrangement of the general abrasive grains is different.
This is the same as in the first embodiment, and the particle size of the abrasive grains and the number of particles per unit area are set in the same manner as in the first embodiment.

In FIG. 2 showing a second embodiment of the present invention, the general abrasive grains are fixed on the base material 1 in the form of a linear particle block 2A having a continuous honeycomb shape.

FIG. 2 is a photograph of a general abrasive grain having a particle diameter of 260 μm and a number of particles of 970/100 cm ² fixed in a honeycomb-shaped linear particle mass at a magnification of × 4.5. The width of the line of the particle mass in the case is 4 mm.

In FIG. 3 showing a third embodiment of the present invention, general abrasive grains are fixed on the substrate 1 in a plurality of linear particle clusters 2B to 2B parallel to each other. Fig. 3 shows a photograph taken at × 4.5 magnification of a state in which general abrasive grains having a particle size of 260 μm and a number of particles of 1090/100 cm ² are fixed to a base material in the form of a plurality of parallel linear particle masses. In this case, the line width of each particle mass is 4.5 mm.

In the case of linear particle agglomerates such as the particle agglomerates 2A and 2B of the second and third embodiments, the width of the line is set to be at least twice and at most 60 times the particle size. For example, when using JIS grain # 400 abrasive grains, the grain size is about 40 μm, so the line width is 80 μm
It is set in the range of 22,400 μm.

The particle mass 2A and the particle masses 2B to 2B can be fixed to the base material 1 in the same manner as the particle mass 2 of the first embodiment.

(Effect of the Invention) In the abrasive cloth paper of the present invention, a method per abrasive grain required for grinding wood, painted surface, plastic, hard rubber, etc., without causing early wear and abrasion of the cutting edge of the abrasive grain. Since the linear force can be increased, the grinding force can be improved, and clogging due to heat generation can be prevented, so that the work accuracy of the work can be improved, and further, the work can be prevented from being scorched by heat. In addition, since the tangential resistance to the work is reduced, the separation of the abrasive grains from the base material can be prevented. Furthermore, by adopting a configuration in which the abrasive grains are arranged in a dot-like or linear-like particle mass, the number of particles per unit area can be easily and accurately set, so that a polishing cloth having the above-described effects can be easily and inexpensively manufactured. Since the abrasive grains can be evenly and uniformly dispersed on the base material, accurate grinding can be performed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a part of an abrasive cloth according to a first embodiment of the present invention, FIG. 2 is a plan view showing a part of an abrasive cloth according to a second embodiment of the present invention, and FIG. FIG. 9 is a plan view showing a part of the abrasive cloth according to a third embodiment of the present invention. 1. Base material 2, 2A, 2B ... Particle mass

Claims (1)

(57) [Claims] The present invention is characterized in that the number of grains per unit area of an alundum-based or silicon carbide-based abrasive having a particle size of about 5 to about 400 μm is about 3.
5 to about 28% is fixed on the base material in the form of dot or linear particles, and the number of abrasive grains constituting each particle in the case of dots is 2
研磨 1900, wherein the width of the line of the linear particle mass is set to 2 times or more and 60 times or less of the abrasive particle size.