JPH0655460A - Polishing and grinding brush and its manufacture - Google Patents

Abstract

PURPOSE:To provide a polishing and grinding brush which is excellent in accuracy in polishing and grinding even when a polished and ground surface is curved, and of a complex shape wherein the brush itself takes a firm stand, is moreover flexible, and also is excellent in mechanical strength and wear resistance. CONSTITUTION:This invention is concerned with a method for manufacturing a polishing and grinding brush and bristles use. As for the brush, it is composed of the bristles each of which is of 0.1mm<2> to 5.0mm<2> in cross sectional area while 5 to 60% non-organic short fibers by volume is included in its synthetic resin base material wherein each short fiber has Vickers hardness value equal to or more than 500kg/mm<2>, has a length of 0.2mm to 20mm, also has the orientation angle of 0 deg. to 30 deg. in the longer direction while a ratio of fiber length to diameter is equal to or more than 10. As for the bristles, synthetic resin mixed with non-organic short fibers is extruded out of a nozzle so as to be formed into a strand, and subsequently the strand is extended to the extent of length 1.5 to 5.0 times.

Description

Detailed Description of the Invention [0001] BACKGROUND OF THE INVENTION The present invention is applicable to resins, rubbers, metals, and
Various materials such as Ramix, glass, stone, wood, composite materials, etc.
The present invention relates to a brush for polishing and grinding the surface of a material. Above all, hair
The present invention relates to the brush having characteristics. [0002] 2. Description of the Related Art Abrasive particles and non-abrasive materials are used as the bristles of abrasive grinding brushes.
Made of synthetic resin containing mechanical fragments and fibrous whiskers
Use a monofilament with a diameter of 0.1 to 2.0 mm
Is proposed. For example, Japanese Patent Laid-Open No. 61-176304
Report, JP-A-62-39184, etc., contained abrasive particles.
Monofilament obtained by melt spinning a thermoplastic resin
There is proposed a brush obtained by using this as a bristle material and processing this.
Japanese Patent Laid-Open No. 68-21920 discloses that a wholly aromatic polyamide layer is not used.
Formed from a wholly aromatic polyamide layer containing fine particles
A brush using a flat material as a bristle material has been proposed.
Japanese Patent Laid-Open No. 1-262806 discloses a nylon fiber with a fibrous titanium
A brush bristle material containing potassium phosphate whiskers is proposed.
Has been. [0003] [Problems to be Solved by the Invention]
Brush bristles of thermoplastic resin containing particles and inorganic strips,
There is a limit to the content of abrasive particles and inorganic fine particles in manufacturing.
The waist is not strong enough, and the wear during polishing is large,
The polishing efficiency is not great, or it is amorphous, or
Also, there is no direction even if it is a short fiber like a whisker.
These end faces are not always effective for the surface to be ground.
Therefore, the polishing and grinding efficiency and accuracy are not sufficient.
Yes. [0004] The present invention is strong and flexible and breaks easily.
Difficult to do, if the surface of the material to be polished is curved or has a
Even if there is, the grinding precision is good and the grinding ability is large.
Abrasive grinding with excellent mechanical strength and wear resistance
A brush and a method for manufacturing the brush are provided. [0005] The present invention relates to a synthetic resin
And has a Vickers hardness of 500 kg / mm²As described above, the fiber length is 0.
Inorganic with a diameter of 2 mm to 20 mm and a fiber length to diameter ratio of 10 or more
The short fibers have an orientation angle of 0 ° to 30 ° with respect to the longitudinal direction.
Containing 5 to 60% by volume, the cross-sectional area is 0.1 mm²
~ 5 mm²An abrasive grinding brush consisting of a bristle material that is
Press the molten synthetic resin mixed with inorganic short fibers from the nozzle.
As an extruded strand, the strand is 1.5 times to 5
This is a method for producing the hair material that is double-stretched. As the synthetic resin of the present invention, polyamide,
Polyethylene, polypropylene, polymethylmethacrylate
Sheet, polystyrene, polyvinyl chloride, ABS resin,
AS resin, polyacrylonitrile, polyacetal, polyethylene
Risulphone, Polycarbonate, Polyphenylene Oki
Side, polyether sulfone, polyether ketone,
Polyamide imide, polyvinyl alcohol, polyvinyl
Formal, polyvinyl butyral, fluororesin, acetone
Thermoplastic resins such as tar resin and phenoxy resin;
Ren-based elastomer, olefin-based elastomer, poly
Such as ethylene-based elastomers and urethane-based elastomers
Thermoplastic elastomer; epoxy resin, phenolic resin
Fat, alkyd resin, urea-formalin resin, polyimid
Although it is a thermosetting resin, such as
It exhibits plasticity. Among these synthetic resins,
Thermoplastic resins and thermoplastic elastomers are preferable in terms of processability.
Especially, it has excellent heat resistance, impact resistance, and wear resistance.
Liamide, polycarbonate, polyamideimide, poly
Vinyl alcohol, polyvinyl butyral, etc. are suitable.
It Furthermore, a small amount of various organic compounds,
Mix inorganic fillers, mix various pigments, dyes, etc.
It may be colored in combination. In addition, these resins
Bubble it to make it porous, and depending on the degree,
You can also adjust the height. The inorganic short fibers of the present invention are alumina fibers.
Fiber, silica fiber, silicon carbide fiber, Si-Ti-C-O fiber
Fiber (so-called Tyranno fiber), silicon nitride fiber, silicon oxide
Ceramic fiber such as xylonite fiber; boron fiber
Fiber, metal fiber such as tungsten fiber; selected from carbon fiber
And hardness, as well as physical properties such as strength, impact resistance, and thermal conductivity.
Two or more kinds may be combined for balancing. Further, the bristle material used for the abrasive grinding brush is
Flexible fibers to adjust its waist strength, for example, glass
Fiber; rayon fiber, polyamide fiber, polyester
Fiber, acrylic fiber, vinylon fiber, polyethylene fiber
Fiber, polypropylene fiber, vinyl chloride fiber, Teflon
Synthetic fibers such as fibers; cotton, hemp, wool, silk, groove, three
Natural fibers such as camellia and jute may be used in combination. Vickers hardness of the inorganic short fibers of the present invention
Is 500 kg / mm²This is all of the above fibers.
It Vickers hardness is 500kg / mm²Polishing less than
The cutting ability is inferior. The fiber length of the present invention exceeds 0.2 mm and is 20 mm or less.
Below. If it is less than 0.2 mm, the reinforcing effect of the hair material is small,
If it exceeds 20 mm, the mixing and dispersion with the synthetic resin becomes poor.
These fibers are made by cutting continuous fibers or long fibers, and
Some have short fibers. The fiber length to diameter ratio of the present invention, or aspect
The ratio is 10 or more. Aspect ratio is less than 10
And, the reinforcing effect of the hair material is substantially lost. In the present invention, the inorganic short fibers in the hair material
Are arranged at an orientation angle of 0 ° to 30 ° with respect to the longitudinal direction.
There is. If the orientation angle exceeds 30 °, the end face of the fiber will be
Grinding force is insufficient because it is no longer standing against the polished surface
On the top, the shape of the blade tip surface due to the fiber becomes uneven and it is polished
The accuracy is also poor. Also, use with repeated impact
Cause of breakage due to poor mechanical strength in the longitudinal direction
Becomes The orientation angle is preferably 0 ° to 20 °. Inorganic short fibers having an orientation angle of 0 ° to 30 ° are
The proportion in the hair material is 5 to 60% by volume. 5 capacity
If it is less than%, the grinding force is inferior and it cannot be used as an abrasive grinding brush.
Yes. Abrasive grinding brush that is too stiff when exceeding 60% by volume
It is difficult to handle and the polishing accuracy is poor. Preferably 10
~ 50% by volume. The inorganic short fibers in the hair material of the present invention are
It suffices to have the compounding angle and its amount as described above.
However, it is at most 80% by volume including those with other compounding angles.
It If it exceeds 80% by volume, the bristle material becomes brittle. The smaller the cross-sectional area of the hair material of the present invention, the softer the waist.
It becomes a soft brush, and the larger the waist, the stiffer the waist.
However, the cross-sectional area of hair is 0.1 mm²~ 5 mm²Easy to use
Yes. An abrasive grinding brush using the bristle material of the present invention
For example, roll brush, flat brush, channel brush
Rashi, cup brush, wheel brush, high density brush,
It can be applied to various known shapes such as a bar brush. The length of the bristle material when making a brush is different from each brush.
Choose the one that is suitable for. Also the array of brush bristle materials
Also known as straight line, spiral, staggered and radial
Can be applied. Bristles that form these brushes
The outer member may be a known one. Make brush
Well known manufacturing method can be applied. So in general
Collects and arranges hair materials and transplants hair. Grinding material to be ground using the brush of the present invention
Well-known techniques can be applied to polishing and grinding. The method of manufacturing the hair material of the present invention is as follows.
The synthetic resin and the inorganic short fibers are mixed into
The quantitative ratio of% is mixed by a known method. As a mixing method, a synthetic resin is used as a pellet.
If it is in the form of powder or powder, tumbler these and inorganic short fibers,
Mix with a mixer such as a Henschel mixer. Or
Mix with the auxiliary equipment of the extruder described below or the screw of the main body
Good. Alternatively, the monomer or precursor of the raw material of the synthetic resin
Mix inorganic short fibers into the body and then polymerize the monomer
Alternatively, a synthetic resin in which inorganic short fibers are mixed may be used. For melting and extruding the synthetic resin of the mixture
Is a known extruder capable of heating. To the extruder
Is generally a single-screw or multi-screw extruder,
If resin viscosity is very low, ram type, gear type extrusion
You may use a machine. The extruder passed the melt through a nozzle.
Let it be a strand. Usually, several to several tens of holes
Use the extruder equipped with a die plate that has
And by. The size of the nozzle hole depends on the cross section of the desired bristle material.
It is about 1.5 to 5 times the product. Also, the shape is usually a circle
Shape, but depending on the cross-sectional shape of the desired bristle material, a triangle,
It may be square or ring-shaped. The obtained strand was lengthwise adjusted to 1.5
~ Stretch 5 times. It is preferably 2 to 5 times. By this drawing, the inorganic short fibers are drawn
Orientation, that is, in the length direction. The larger the draw ratio
Many orientations. Also, the strand is inversely proportional to the draw ratio.
The cross-sectional area of the
Then, the draw ratio may be determined. The method for stretching the strand is to uniformly stretch
Any method may be used as long as it can be stretched. Specifically,
The method for producing synthetic monofilaments is compatible
, For example, from two or more sets of godet rolls
There is a known method using a stretching device. The stretching conditions are
Due to the characteristics of the synthetic resin and the characteristics of the equipment,
It can be set by several trials so as to obtain the draw ratio. Depending on the case, among the synthetic resins obtained by stretching,
Part strain is removed or the thermosetting resin is cured after stretching.
The filament is heated to harden it. Heating method
Is performed in a hot water bath or oven. [0030] The polishing and grinding brush of the present invention is suitable for
The bristle material is uniform, and the strength of the waist can also be adjusted, making it flexible
It is hard to break. Moreover, it has excellent mechanical strength and wear resistance.
ing. In addition, it has excellent corrosion resistance and oxidation resistance
Since there is no reaction with the abrasive material and the high thermal conductivity, friction
There is little adverse effect from heat and conventional abrasives can be used
Polishing efficiency and precision with materials and conditions that were not available
Can be ground by grinding. With the polishing and grinding brush of the present invention, various
Materials such as steel, aluminum, alloys, etc.
Not only polishing and grinding, but also glass, composite materials, resin, ceramic
When polishing the surface of a box, rubber, etc.
Brush made of granular synthetic resin or wholly aromatic polyamide
Compared with, hair wear is less, polishing and grinding ability, surface roughness
Excellent in uniformity of precision. Further, polishing of the coating film, for example, to steel plate
Epoxy resin type, melamine alkyd resin type,
Multi-layer coating of stellate resin, acrylic resin, etc.
When painting, eliminate the height difference between the painted surfaces.
Delivers a fine surface roughness, enhances the anchor effect, and removes paint
It is effective in preventing. Specifically, polishing of automobile coating lines,
Polishing of seed processing rolls, printed circuit boards, lead frames, etc.
Micro scratch processing, heating conveyor net grinding
It is suitable for applications such as polishing and grinding in the iron making process. [0033] EXAMPLES The present invention will be further described below with reference to Examples.
Is not limited to this. Abrasive grinding brush
Uses a bristle material with an outer diameter of 120 mm, a width of 35 mm, and a hair length of 30
It is made as a cup type rotating brush of mm. Abrasive grinding
Is evaluated by the rotating brush rotating speed of 1000r.p.m, load
0.3 kg / cm², Steel plate (S4
5C, Vickers hardness 700, center line average roughness Ra = 0.
03 μm, maximum height Rmax = 0.5 μm) and steel plate
Acrylic resin based on Shinto Paint Co., Ltd. with a thickness of 50 μm
Paint applied (Rockwell hardness (ASTM-D
785) = M100, Ra = 0.02 μm, Rmax =
The surface roughness of two materials of 0.5 μm)
And the wear rate of the hair material. The surface roughness of the ground product is the roughness of the stylus type.
Polished using a total (Tokyo Seimitsu Co., Ltd., Surfcom)
Centerline average roughness Ra (μm) by scanning at right angles to the direction
And the maximum height Rmax (μm) were measured. Hair wear rate
Is the weight after drying the brush at 100 ° C for 2 hours before and after use.
Was measured and calculated from the reduction rate. Example 1 15mm diameter 0.5mm length alumina fiber Altex
(Al₂O₃85% by weight, SiO₂15% by weight: Sumitomo
7 kg of Gaku Kogyo Co., Ltd., 10 kg of chip-shaped polyamide 6
And a pre-mixed circular nozzle with a circular section of 1.5 mm in diameter
Using a twin screw extruder with die having 10
Extruded at 250 ° C and cooled in a water bath to form strands
Obtained. Godet roll on the inlet side and the outlet side of the strand
In a warm water bath with a
Side and outlet side rolls have a peripheral speed ratio of 1: 3
Is 0.9 mm and the cross-sectional area is 0.64 mm²Get the filament of
It was The draw ratio was about 3 times. This filament
Make two cup-shaped brushes with a volume filling rate of 40% as bristle materials.
Manufactured, and one of them was used to polish the steel plate. Table 1 shows the evaluation results
Shown in. Example 2 Using the remaining one of the rotating brushes made in Example 1,
A coating film obtained by applying an acrylic resin-based paint to a steel plate was polished.
The evaluation results are shown in Table 1. Example 3 Example 1 except that an alumina fiber having a fiber length of 10 mm was used.
Do the same as above to make two rotating brushes, one of which is
The steel plate was polished. The evaluation results are shown in Table 1. Example 4 Using the remaining one of the rotating brushes made in Example 3,
A coating film obtained by applying an acrylic resin-based paint to a steel plate was polished.
The evaluation results are shown in Table 1. Example 5 Instead of the alumina fiber of Example 1, the diameter is 15 μm and the length is
0.5 mm silicon carbide fiber Nicalon (NL-200: Sun
Example except that 5.6 kg of this carbon Co., Ltd. was used
Do the same as 1 to make 2 rotating brushes, 1 of which
The steel plate was polished with. The evaluation results are shown in Table 1. Example 6 Using the remaining one of the rotating brushes made in Example 5,
A coating film obtained by applying an acrylic resin-based paint to a steel plate was polished.
The evaluation results are shown in Table 1. Comparative Example 1 Commercially available bristle material, trade name Tregrit, product number 153-0.5
5W-50C (Toray Monofilament Co., Ltd., Nye
Ron 6 contains 30 aluminum oxide powder with an average particle size of # 500
Weight% mixed, cross-sectional area 0.24mm²) Using the volume of hair
Two cup-shaped rotating brushes with a filling rate of 42% were prepared and
The steel plate was polished by one of them. The evaluation results are shown in Table 2. Comparative Example 2 Using the remaining one of the rotating brushes prepared in Comparative Example 1,
A coating film obtained by applying an acrylic resin-based paint to a steel plate was polished.
The evaluation results are shown in Table 2. Comparative Example 3 Commercially available bristle material, product name Conex Bristle (Teijin
Oxidation of wholly aromatic polyamide manufactured by K.K. with an average particle size of 10μ
10% by volume of aluminum mixed, cross-sectional area 0.1 mm ²)
Using a cup-type rotating brush with a volume filling rate of 53%
Two pieces were produced, and one of them was used to polish a steel plate. Evaluation results
Is shown in Table 2. Comparative Example 4 Using the remaining one of the rotating brushes prepared in Comparative Example 3,
A coating film obtained by applying an acrylic resin-based paint to a steel plate was polished.
The evaluation results are shown in Table 2. Comparative Example 5 E-glass fiber with a diameter of 16 μm (2000 continuous long fibers
Ito, Micrograss Roving RER115: Japan
Glass fiber (manufactured by Co., Ltd.) other than 0.5 mm long
Was carried out in the same manner as in Example 1 to produce two rotary brushes.
The steel plate was polished with one of the above. The evaluation results are shown in Table 2. Comparative Example 6 Using the remaining one of the rotating brushes prepared in Comparative Example 5,
A coating film obtained by applying an acrylic resin-based paint to a steel plate was polished.
The evaluation results are shown in Table 2. [0046] [Table 1][0047] [Table 2]

Claims (1)

Claims: 1. A synthetic resin base material having a Vickers hardness of 50.
Inorganic short fibers having a fiber length of 0 kg / mm ² or more, a fiber length of 0.2 mm to ²⁰ mm, and a fiber length to diameter ratio of 10 or more are contained at 5 to 60% by volume at an orientation angle of 0 to 30 ° with respect to the longitudinal direction. ,
Abrasive grinding brushes sectional area consists of bristles is 0.1 mm ² to 5 mm ^2. 2. A method for producing a bristle material according to claim 1, wherein a synthetic resin mixed with inorganic short fibers is extruded from a nozzle to form a strand, and then the strand is stretched 1.5 times to 5 times.