JPH06114748A - Abrasive cloth - Google Patents

Abstract

PURPOSE:To prevent blinding so as to prolong the life by using a stereo-knitted object or stereo fabric, consisting of ground weave and pile yarns to provide flexibility, to serve as a base material, and sticking abrasive material to a top part or partly in the lengthwise direction or a total length of the pile yarns, in an abrasive cloth for precision polishing of burr removal or the like. CONSTITUTION:A base material 1 is constituted of a ground weave 2 and pile yarns 3, to stick abrasives 5 to an upper end part of the pile yarns 3. This ground weave 2 is constituted of a multifilament and a spun yarn. The pile yarn 3 is formed of synthetic fiber and constituted of a monofilament of polypropylene or the like having suitable rigidity. Abrasive grains of No.240 or finer than this number of aluminum oxide or the like is used as the abrasive and mixed in heat resisting resin of epoxy resin or the like, to prepare a polishing abrasive grain layer 6. The base material 1 is passed on this polishing abrasive grain layer 6 to stick it to point end parts of the pile yarns 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing cloth, and more particularly to a polishing cloth which has flexibility and is particularly effective when used for polishing fine parts and precision polishing.

[0002]

2. Description of the Related Art For example, in the case of polishing details such as deburring, rusting off, finishing of the inner surface of a cylinder, or finishing the surface to a mirror surface such as window glass, plate glass, tableware, tiles, it is conventionally made of paper or cloth. The surface of the base material was polished using an abrasive cloth paper coated with an abrasive.

[0003]

However, since the abrasive cloth paper described above can only be subjected to the primary processing, the buff,
Secondary processing with felt or wrapping film was required, which was extremely troublesome. In addition, since such an abrasive cloth has a planar structure, it is not suitable for polishing fine details, and further, since abrasive particles are firmly fixed to the surface of the uneven base material, It was difficult to obtain a mirror-like polished surface.

The present invention has been made in order to solve the above problems, and is a polishing cloth which is flexible and suitable for fine polishing and fine polishing, and is less likely to cause clogging and capable of withstanding long-term use. The purpose is to obtain.

[0005]

The polishing cloth according to the present invention comprises:
A three-dimensional knitted fabric or a three-dimensional woven fabric having a base structure and a pile yarn and having flexibility is used as a base material, and an abrasive is attached to the pile yarn. Further, the present invention is a polishing cloth composed of a three-dimensional knitted fabric or a three-dimensional woven fabric having a ground structure and a pile yarn and having flexibility.

[0006]

Since it has flexibility, it easily fits into the details of the workpiece, the inside of the hole, etc., and the polishing of these can be performed reliably. Further, since the abrasive is sparsely provided on the base material, and the polishing layer softly fits to the processed surface due to the swinging phenomenon of the pile yarn, it is possible to perform polishing with high accuracy.

[0007]

1 is a plan view schematically showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA. In the figure, 1 is a base material made of a three-dimensional knitted fabric composed of a ground structure 2 and pile yarns 3 or a material made of a three-dimensional woven fabric, and 5 is an abrasive attached to the upper ends of the pile yarns 3.

The above-mentioned base material 1 is related to the sale of Unitika Co., Ltd. As shown in FIG. 3 and FIG. 4, it is composed of a ground structure 2 composed of multifilament or spun yarn and, for example, a synthetic fiber, The connecting yarn (hereinafter referred to as a pile yarn) 3 such as a monofilament having a rigidity of 3 is connected to form a three-dimensional structure.

As the material of the pile yarn 3, synthetic fibers such as polypropylene, nylon, acrylic, polyester, Conex, Teflon, etc. and glass fibers are used, and the length thereof is about 5 to 10 mm as a standard, and if necessary, 1
The length can be increased or decreased to about 20 mm. The pile yarn 3 has a thickness of 100 to 1000 d (denier) and a density of about 1 to 200 yarns / cm ² , and the material, length, thickness, density and the like are appropriately changed according to the purpose of use. As the shape of the pile yarn 3, there are a monofilament made of one yarn, a spun yarn made by twisting a plurality of yarns, and a multifilament made of a plurality of yarns.

As the polishing material, aluminum oxide, silicon oxide, diamond, etc., ^# 240 or finer abrasive grains are used. The thickness of the polishing layer is 50 ~
The standard is an individual spherical shape of about 500 μm, and the diameter can be increased or decreased to about 20 to 1000 μm as necessary.
The type of abrasive grains, the particle size, the thickness of the polishing layer, etc. are appropriately changed according to the purpose of use.

In order to manufacture the polishing cloth as described above, the process shown in FIG.
As shown in FIG. 3, abrasive grains such as aluminum oxide, silicon oxide, and diamond are mixed in a resin having heat resistance such as epoxy resin and phenol resin in a volume ratio of about 30 to 60% to form a polishing abrasive grain layer. 6 is made, the base material 1 is passed therethrough, and a predetermined amount of the abrasive grain layer 6 is attached to the tip end portion of each pile yarn 3 and heated and solidified to form a polishing layer.

Since the polishing cloth according to the present invention is constructed as described above, it has the following features. (1) Since it has a three-dimensional structure, it has flexibility, and therefore, it is possible to polish the details of the workpiece. (2) Since the polishing layer is provided at the tip of each pile yarn 3, it can be softly fitted to the polishing surface by the swinging phenomenon and a mirror-like polishing surface can be obtained. (3) Since the polishing layer has an open pattern, clogging due to use is small and a long-life polishing cloth can be obtained.

Embodiment 1. A polishing cloth was produced with the following composition and combination. Base material: Unitika Co., Ltd., a polyester-made monofilament type three-dimensional knitted fabric treated with a phenolic resin, latex, etc. for an abrasive belt Material (pile yarn length: 5 mm, pile yarn thickness: 220 d, pile yarn density 162 Book / cm ² ) Adhesive formulation: Dainippon Ink and Chemicals Co., Ltd. Resol type phenol resin (solid content 78%) 100 parts Nippon Aerosil Co., Ltd. Aerosil (main component: SiO ₂ 99.8%) Viscosity adjustment Amount of water viscosity adjustment Amount viscosity 4000 cps (30 ° C) Abrasive grains: manufactured by Nanko Abrasive Materials Co., Ltd. Silicon Carbide (SiC) ^# 60, 150, 240, 400, 1,000 (5 types) 25 parts each

The above-mentioned adhesive and abrasive grains are mixed to form a polishing abrasive grain layer, and the pile yarn 3 of the substrate 1 is prepared by the method described with reference to FIG.
Abrasive grains of each grain size were attached to the tip of the (monofilament type) and dried and solidified to produce five types of polishing cloths having a three-dimensional structure. Each of these polishing cloths has an outer diameter of 80
It is punched into mmφ to make a polishing disc, which is attached to a sanding machine and pressed so that the entire surface of the polishing disc hits the surface of the work piece (wall board tile with surface polyurethane processing), adding cooling water to 6000r. ． p. It was rotated counterclockwise at m and polished, and after polishing for 1 minute, the roughness of the polished surface was measured. For comparison, silicon carbide abrasive grains ( ^# 60, 150, 240, 400, 1,000)
The work piece was polished under the same conditions as described above by using five types of commercially available water-resistant paper discs that were used. The measurement results are shown in Table 1 and FIG.

[0015]

[Table 1]

As is clear from Table 1, the polishing cloth according to the present invention has a R-value higher than that of the commercially available waterproof paper disc.
It was revealed that a, Rmax and Rz are all small, and a polished surface closer to a mirror surface can be obtained. Further, as is clear from FIG. 6, the above effects were particularly noticeable when the abrasive grains finer than ^# 240 were used.

Example 2. Base material: same as in Example 1 Adhesive formulation: Dainippon Ink and Chemicals, Inc. phenol resin (solid content 78%) 100 parts Nippon Aerosil Co., Ltd. Aerosil (main component: SiO ₂ 99.8%) Viscosity Adjustment amount Water viscosity Adjustment amount Viscosity 4000 cps (30 ° C.) Abrasive grains: Same as in Example 1, except that ^# 400 is used

With the polishing cloth manufactured as described above, an outer diameter of 80
A mmφ polishing disk was prepared, mounted on a polishing machine, and the surface of the object to be processed (SUS304) was polished for 1 minute and 5 minutes according to the procedure of Example 1, and then the roughness of the polished surface was measured. For comparison, the same waterproof paper disk as in Example 1 was used. The measurement results are shown in Tables 2 and 3.

[0019]

[Table 2]

[0020]

[Table 3]

As is clear from Tables 2 and 3, the polishing cloth according to the present invention has Ra and Rma even in the surface polishing of SUS304 as compared with the commercially available water resistant paper disk.
It was revealed that both x and Rz were small and a polished surface closer to a mirror surface could be obtained.

Example 3. Base material: same as in Example 1 Adhesive formulation: Dainippon Ink and Chemicals, Inc. epoxy resin (epoxy equivalent 190) 100 parts curing agent 40 parts accelerator 10 parts Nippon Aerosil Co., Ltd. Aerosil (main component: SiO ₂ 99.8%) Viscosity adjustment amount Methyl ethyl ketone viscosity adjustment amount Viscosity 4000 cps (30 ° C) Abrasive grains: Same as Example 1, but using ^# 400

The polishing cloth manufactured as described above gives an outer diameter of 8
A 0 mmφ polishing disk was made, and SU was applied in the same manner as in Example 2.
The surface of S304 was polished for 1 minute and 5 minutes, respectively, and the roughness of the surface was measured. For comparison, Example 2
The same water resistant paper disc as in the above was used. The measurement results are shown in Tables 4 and 5.

[0024]

[Table 4]

[0025]

[Table 5]

As is apparent from Tables 4 and 5, when the surface of SUS304 is polished using the above adhesive, a polished surface closer to a mirror surface can be obtained as compared with Example 2. Became clear.

In each of the above embodiments, the pile yarn 3 of the base material 1 is used.
An example in which the abrasive 5 is attached to the tip of the is shown in FIG.
As shown in FIG. 9, the abrasive 5 may be attached to the outer periphery of a part or almost the entire length of the pile yarn 3 in the length direction.

In order to manufacture such a polishing cloth, FIG.
As shown in, for example, the pile thread 3 is passed through the undercoat adhesive 7 to attach the undercoat adhesive 7 to the tip end of the pile thread 3, and the pile thread 3 is rotated 180 ° through a roller to erect the pile thread 3 upright. Let As a result, the undercoat adhesive 7 attached to the tip of the pile yarn 3 descends along the pile yarn 3 and adheres over substantially the entire length of the outer periphery of the pile yarn 3. Then, the undercoating adhesive is sprayed, and the abrasive grains are attached by electrodeposition drop or the like, and further, the overcoating adhesive is applied by spraying or the like and dried and solidified. In this case, it is desirable that the undercoat adhesive 7 has a relatively high viscosity.

The polishing cloth constructed as described above can be used for polishing the surface of a workpiece, but it is particularly effective for polishing fine parts.

Example 4. A polishing cloth was produced with the following composition and combination. Material: Unitika Co., Ltd., a polyester-made monofilament type three-dimensional fabric treated with phenolic resin, latex, etc. for polishing belts Material (pile thread length: 5 mm, pile thread thickness: 220 d, pile thread density 162 Book / cm ² ) Adhesive formulation: Dainippon Ink and Chemicals Co., Ltd. resol type phenol resin (solid content 78%) 100 parts Nippon Aerosil Co., Ltd. Aerosil viscosity adjustment amount (main component: SiO ₂ 99.8%) ) Water Viscosity adjustment amount Viscosity 4000 cps (30 ° C.) Abrasive grain: manufactured by Nanko Abrasive Materials Industry Co., Ltd. Silicon Carbide (SiC) ^# 400 25 parts

By using the above-mentioned adhesive and abrasive grains, an abrasive is adhered to the upper half and the outer circumference of the pile yarn 3 (monofilament type) of the base material 1 by the method described in FIG. Thus, a polishing cloth having a three-dimensional structure was manufactured. This polishing cloth was punched out to an outer diameter of 80 mmφ and pressed so that the entire surface of the polishing disk hits the surface of the object to be processed (SUS304), while adding cooling water to 6000 rpm. p.
It was rotated counterclockwise at m and polished, and after polishing for 1 minute, the roughness of the polished surface was measured. The measurement results are shown in Table 6.

[0032]

[Table 6]

As is clear from Table 6, the same results as in Example 2 were obtained in this example as well.

In the above description, a case where a three-dimensional knitted fabric or a three-dimensional woven fabric having a ground structure and pile yarns and having flexibility is used as a base material and an abrasive material is attached to the pile yarns to form a polishing cloth has been described. Alternatively, the three-dimensional knitted fabric or the three-dimensional woven fabric may be used as it is as a polishing cloth without attaching an abrasive. Such a polishing cloth is particularly effective as a polishing cloth for finishing when the surface is mirror-finished such as window glass, plate glass, tiles and the like.

[0035]

EFFECTS OF THE INVENTION As is clear from the above description, according to the present invention, an abrasive material is adhered to a pile yarn of a base material made of a three-dimensional knitted fabric or a three-dimensional woven fabric having flexibility and consisting of a ground structure and a pile yarn to give an abrasive cloth Or the polishing cloth is made of the above-mentioned three-dimensional knitted fabric or three-dimensional woven fabric, the following effects can be obtained. (1) Since it has a three-dimensional structure and flexibility, it is possible to effectively polish the details of the workpiece, the inside of the holes, and the like. (2) Since the pile yarn is provided with a polishing layer, the polishing action of the pile yarn causes the polishing layer to softly conform to the polishing surface of the workpiece, and thereby a mirror-like polishing surface can be obtained with high accuracy. (3) Since the polishing layer has an open pattern, clogging due to use is small and a long-life polishing cloth can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of an example of a base material used in the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a schematic diagram for explaining an example of manufacturing the polishing cloth of FIG.

FIG. 6 is a diagram showing a grain size of an abrasive material attached to a pile yarn of an abrasive cloth according to the present invention and a polishing result (surface roughness) of a material to be abraded thereby.

FIG. 7 is a plan view schematically showing another embodiment of the present invention.

FIG. 8 is a sectional view taken along line CC of FIG.

FIG. 9 is a sectional view showing a main part of still another embodiment of the present invention.

FIG. 10 is a schematic diagram for explaining an example of manufacturing the polishing cloth of FIG.

[Explanation of symbols]

 1 Base Material 2 Ground Texture 3 Pile Thread 5 Abrasive

Claims (2)

[Claims] 1. A three-dimensional knitted fabric or a three-dimensional woven fabric having flexibility, which is composed of a ground structure and pile yarns, is used as a base material, and an abrasive is attached to the tops of the pile yarns or a part or almost the entire length of the pile yarns. Polishing cloth. 2. A polishing cloth made of a three-dimensional knitted fabric or a three-dimensional woven fabric having flexibility, which is composed of a ground structure and a pile yarn.