JPH08155839A - Brush roll polishing body and brush roll - Google Patents

Abstract

PURPOSE: To improve polishing force and wear resistance by forming a brush roll polishing body of bristles formed of filament prepared by mixing an extreme-pressure additive into resin together with abrasive grains. CONSTITUTION: A polishing body 1 for a brush roll R is formed of bristles 1a or the like formed of filaments prepared by mixing a specified quantity of an extreme-pressure additive 10 into resin together with a specified quantity of abrasive grains 11 and formed by a monofilament forming method. The bristles 1a cut into specified length are planted on the peripheral surface of a brush disc 21 of ring shape, and the disc 21 with the bristles 1a planted thereon is mounted on a roll shaft 3 to form the polishing body 1 for the brush roller R. At this time, it is so specified that the intermixing quantity of the abrasive grains 11 is 5-40wt.%, the quantity of resin is 60wt.%, and the intermixing quantity of the extreme-pressure additive 10 is 0.05-5wt.% to the abrasive grains 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing body for a brush roll for grinding or polishing a plate (hereinafter collectively referred to as a strip) such as a thick plate or a thin plate in a steel plate production line, In particular, the present invention relates to an abrasive body having bristles of filament yarn or a rod-like body, which has abrasive particles such as abrasive grains as a polishing element, and a brush roll having the abrasive body as a constituent element.

[0002]

2. Description of the Related Art Heretofore, it has been well known as such an abrasive body that a bristle of synthetic filament yarn made by mixing abrasive grains and a bristle of synthetic filament yarn having abrasive grains adhered to the surface thereof are used. It is a thing. It is known to those skilled in the art that these abrasives have good polishing power because they are abrasive grains, but they are not enough.

Further, a polishing body made of a rod-shaped body made by mixing abrasive grains into a resin is also known, for example, from Japanese Patent Publication No. 4-6501. This polishing body has a polishing performance comparable to or close to that of a polishing wheel, but the abrasion resistance is not sufficient.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve the abrading power as compared with the prior art in the abrading body of the brush roll by the bristle of filament yarn or by the rod-shaped body having abrasive particles as abrading element, and To improve wear resistance.

[0005]

A feature of the present invention is that a brush roll abrasive body is formed by a bristle made of a filament yarn made by mixing an extreme pressure additive with an abrasive particle into a resin or by a rod-shaped body. In point.

The extreme pressure additive may be added and kneaded to the resin filaments containing the abrasive particles or the resin compound containing the abrasive particles at the stage of producing the resin compound.

As the extreme pressure additive, chlorinated paraffin,
Examples thereof include chlorinated fatty acids, chlorinated fatty acid ester sulfide mineral oils, sulfurized chlorinated oils and fats, sulfurized oils and fats, polysulfites, phosphates, phosphites, zinc dialkyldithiophosphates, and molybdenum compounds.

As the abrasive particles, silicon carbide, fused alumina, diamond, CBN, and others conventionally used as abrasive particles can be used.

In the present invention, the resin used for the rod-shaped polishing body has a function as a binder for fixing and holding the abrasive particles, and either a thermosetting resin or a thermoplastic resin can be used. Examples of such resin include polyimide resin, epoxy resin, phenol resin, phenoxy resin, polyester resin, polyamide resin, polyphenylene sulfide resin, polyacetal resin, polyurethane resin and the like. On the other hand, resins used for bristles made of filament yarn include polyester resins, polyamide resins, polyphenylene sulfide resins, polyacetal resins, polyurethane resins and the like.

The addition amount of the extreme pressure additive is 0.05 to 5% (weight ratio) with respect to the amount of the abrasive particles in the abrasive body made of the bristle of filament yarn, and the amount of the abrasive particles in the abrasive body made of the rod-shaped body. Is 0.05 to 5% (weight ratio). If it is less than this, the desired improvement of the polishing power cannot be obtained, and if it is more than the above, the extreme pressure additive cannot be uniformly mixed, the yield of the polishing body is extremely lowered, and further, the physical properties of the obtained thread or rod-shaped body. It has fallen, which is a practical problem.

In order to add the extreme pressure additive, a method of adhering the extreme pressure additive to the surface of the resin chip, mixing the abrasive particles with it, and heating and melting and kneading the mixture with an extruder, the abrasive particles A method of adhering extreme pressure additive to the surface, mixing this with resin chips, heating and melting and kneading this with an extruder, mixing resin chips, abrasive particles and extreme pressure additive, and heating this with an extruder A method of melt-kneading or a method of adding from the middle of the extruder cylinder can be used.

The amount of the abrasive particles added is in the range of 5 to 40% (weight ratio) in the case of the bristles of filament yarn, and if it is more than this, the physical properties of the filament yarn deteriorate and the durability becomes a problem. Below, the polishing power becomes insufficient. In the case of a rod-shaped body, durability is obtained when the amount of abrasive particles added is from 5 to 90% (weight ratio). If it is more than this, the strength is insufficient and dangerous, and if it is below, the polishing force is insufficient.

The amount of resin is required to be 60% (weight ratio) or more in the case of an abrasive body made of bristles of filament yarn, and if it is less than this, the physical properties will be a problem in practical use. In the case of a rod-shaped polishing body, 10% (weight ratio) or more is required, and if it is less than this, the physical properties become unpractical.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings showing an embodiment of the present invention,
The present invention will be described.

The polishing body 1 of the brush roll R was obtained by a monofilament molding method by mixing a predetermined amount of the extreme pressure additive 10 together with a predetermined amount of abrasive particles 11 such as abrasive grains in a resin according to the above-mentioned specifications. A filament yarn, more preferably a bristle 1a made of resin-processed by spirally winding ultrafine multifilament yarn or covering with a braid-like structure, or a predetermined amount of extreme pressure additive with similar specifications This is a type of rod-shaped body 1b obtained by injection molding by mixing 10 and abrasive particles 11 in resin.

The bristle 1a of the filament yarn is cut into a predetermined length, and a ring-shaped brush disk 2 is obtained.
1 is flocked to the outer peripheral surface, and the flocked disk 21 is mounted on the roll shaft 3, and the polishing body 1 in the brush roll R is
It is good to [FIG. 2 (A)]. The flocking and the mounting of the disk 21 may be performed according to a conventional method. The bristles 1a cut into a predetermined length are flocked to a supporting member 21 'made of a groove-shaped metal plate (FIG. 5), and the flocked member 2
It is also possible to spirally wind and attach 1'to the roll shaft 3 to form the polishing body 1 in the brush roll R. In this case, the flocking and the attachment of the member 21 'may be performed according to the conventional method.

The rod-shaped body 1b is, for example, a rod-shaped elastic body 13 formed by resin-processing a fiber string and connected to the tip end thereof by a metal sleeve 12, and the disc-shaped segment 22 made of a fan-shaped board.
Are arranged on the outer peripheral surface of the roll shaft 3 in rows in the lengthwise direction, and the disk segments 22 are arranged in a circle around the axis of the roll shaft 3 and the parallel bodies of the disk segments 22 arranged in the circle are the length of the shaft 3. The polishing body 1 of the brush roll R may be mounted with appropriate specifications in a manner in which the brush rolls R are aligned in contact with each other. The configuration of such a brush roll is the same as the known one disclosed in, for example, Japanese Patent Application Laid-Open No. 4-19078, except that the rod-shaped body 1b as the polishing body 1 contains an extreme pressure additive. A more detailed description is omitted.

When the strip is abraded by the brush roll having the abrasive body according to the present invention as a constituent element, an abrading force superior to the above-mentioned prior art can be obtained and a high abrasion resistance can be obtained.

By the way, a grinding test was conducted on the abrasive body of the present invention and an abrasive body of the same comparative example as the abrasive body of the present invention except that the extreme pressure additive was not included. In the case of the bristle abrasive body, the grinding force is 1.3 times or more that of the comparative sample, the wear amount is 0.7 or less of the comparative sample, and the grinding force of the rod-shaped abrasive body is 1.5 of the comparative sample.
The wear amount was double or more and was 0.6 or less of the comparative sample.

The polishing body of the present invention and the polishing body as a comparative example, which are used for the grinding test, the brush rolls produced by using these polishing bodies, and the test conditions are as follows.

Test Example 1 70 parts of 6 nylon chips were mixed with 0.1% of 40% chlorinated mineral oil.
Add 2 parts, mix, and attach to the surface of the chip. 30 parts of silicon carbide abrasive grains having a grain size of # 80 (JIS), to which 0.3 part of γ-aminopropyltriethoxysilane is attached, is mixed with the above-mentioned chips. The mixture was heated to 270 ° C. 45
It was put into a cooling water tank through a 4 mmφ spinneret with a mmφ single-screw extruder, and then passed through a tunnel heated to 300 ° C. and drawn 3.0 times to produce a 1.0 mmφ filament (invention thread). A 1.0 mmφ filament was manufactured in the same manner except that 40% chlorinated mineral oil was not added (Comparative Example Yarn). In each case, the obtained yarn was cut into a length of 80 mm, 10 yarns were bundled, diameter 260 mm, thickness 1
After passing through 40 holes formed along the outer periphery of the tin plate of mm, it is anti-folded, and a wire is passed through small holes formed near both sides of the hole and bound with the wire. The disc has a shaft hole in the center and a key groove for keying the shaft [Fig. 2
(A)]. A roller is manufactured according to the specifications in which 140 disks thus flocked are fitted into a shaft in a shaft hole to form a laminated shape and pressed, and then the laminated disk is fixed by sandwiching it from both sides. The brush roll thus obtained is set on a brush roll stand, and 1000
While holding down the rotation speed of 3 rpm for 3 mm, set the steel plate to 3
The plate is passed at 0 m / min and ground while being sprinkled with water. The ground steel plate is cut into a 100 mm square and the weight is measured. Cut the steel plate before grinding to the same size and measure the weight,
The difference (grinding amount) between this and the weight of the steel sheet after grinding is obtained. This value is converted per m ² . Further, the outer diameter of the roll after 50 hours of operation is measured to obtain the wear amount, and the wear amount per hour is calculated.

The results obtained are as follows.

Grinding amount Abrasion amount g / m ² mm / hr Inventive roll 1.2 0.025 Comparative example roll 0.8 0.04 Test example 2 6 Nylon tip 30 parts was filled with 40% chlorinated mineral oil. Two
Add 8 parts and mix and attach this to the surface of the chip.
This chlorinated mineral oil-adhered chip was heated to 270 ° C.
It is fed to a 0 mmφ twin-screw extruder at a flow rate of 9 kg / hr.
0.7 part of γ-aminopropyltriethoxysilane adhered to 70 parts of silicon carbide abrasive grains having a particle size of # 80 (JIS) is supplied from the middle of the extruder cylinder to the extruder at a flow rate of 21 kg / hr and kneaded. After that, it is extruded through a 5 mmφ die, cooled and cut to make a compound tip.

For comparison, compound chips containing no 40% chlorinated mineral oil were prepared in the same manner except that 40% chlorinated mineral oil was not added.

In each case, the compound chip is molded into a grinding body by using an injection molding machine. (FIG. 1B). The molded body and a rod-shaped elastic body obtained by resin-processing a nylon monofilament string having a diameter of 2.5 mm are inserted into both sides of a thin metal tube and caulked to form an element. Using eight of these elements as an insert, the segment [Fig.
(B)] is made by insert molding. A roll is manufactured according to a specification in which the segment is keyed to a shaft having 12 key grooves on its peripheral surface.

The brush roll thus obtained is set on a brush roll stand, and the rotation speed is 1200 rpm and 2
The steel plate is passed through the steel plate at a rate of 30 m / min while being pressed down by mm, and is ground while being sprinkled with water. 100m of ground steel plate
Cut out to m-square size and measure the weight. The steel sheet before grinding is cut into the same size and the weight is measured, and the difference between this and the weight of the steel sheet after grinding (grinding amount) is obtained. This value is converted per m ² . Also, after 10 hours of operation, the outer diameter of the roll is measured to obtain the amount of wear, and the amount of wear per hour is calculated.

The results obtained are as follows.

Grinding amount Abrasion amount gr / m ² mm / hr Roll of the present invention 25 0.04 Comparative roll 15 0.10 Test example 3 6 To 75 parts of nylon tip, 0.15 parts of sulfurized oil and fat was added and mixed, Attach to the chip surface. The sulfurized fat-and-oil adhered chips are supplied to a 40 mmφ twin-screw extruder heated to 270 ° C. at a flow rate of 7.5 kg / hr. 0.3 part of γ-aminopropyltriethoxysilane adhered to 25 parts of silicon carbide abrasive grains having a grain size of # 80 (JIS) was fed to the extruder at a flow rate of 2.5 kg / hr from the middle of the extruder cylinder. After kneading, the mixture was extruded through a 4 mmφ spinneret, cooled in a cooling water tank, and then stretched 3.0 times through a tunnel heated to 300 ° C. to produce a 1.0 mmφ filament (invention thread). A filament of 1.0 mmφ was manufactured in the same manner except that the sulfurized oil was not added (comparative example yarn).

In each case, the obtained thread was cut into a length of 80 mm, 10 pieces were bundled, passed through 40 holes formed along the outer circumference of a tin plate having a diameter of 260 mm and a thickness of 1 mm, and folded back to form both sides of the hole. Pass a wire through a small hole made nearby and tie it with the wire.
The disc separately has a shaft hole in the center and a key groove for keying to the shaft [Fig. 2 (A)]. A roller is manufactured in such a manner that 140 disks thus flocked are fitted into a shaft in a shaft hole to form a laminated shape and pressed, and then the laminated disk is fixed by sandwiching it from both sides. The brush roll thus obtained is set on a brush roll stand, and the number of revolutions at 1000 rpm is set to 3
A steel plate is passed at a speed of 30 m / min while being held down by mm, and is ground while being sprinkled with water. 100m of ground steel plate
Cut out to m-square size and measure the weight. The steel sheet before grinding is cut into the same size and the weight is measured, and the difference between this and the weight of the steel sheet after grinding (grinding amount) is obtained. This value is converted per m ² . Further, the outer diameter of the roll after 50 hours of operation is measured to obtain the wear amount, and the wear amount per hour is calculated.

The results obtained are as follows.

Grinding amount Abrasion amount gr / m ² mm / hr Roll of the present invention 1.1 0.028 Comparative roll 0.8 0.8 0.04 Test example 4 6 Nylon tip 30 parts with chlorinated chlorinated oil 0.30 parts In addition, they are mixed and attached to the surface of the chip. The chlorinated chlorinated fat and oil attached chips are supplied to a 40 mmφ twin-screw extruder heated to 270 ° C. at a flow rate of 9 kg / hr. From the middle of the extruder cylinder, gamma aminopropyltriethoxysilane 0.
A mixture of 7 parts adhered to 70 parts of silicon carbide abrasive grains having a grain size of # 80 (JIS) is supplied to the extruder at a flow rate of 21 kgs / hr, and after kneading, extruded through a 5 mmφ die, cooled and cut to form a compound tip. To make.

For comparison, compound chips containing no chlorinated chlorinated fat are prepared in the same manner except that no chlorinated chlorinated fat is added.

In each case, the chips are molded into an abrasive body by an injection molding machine. The molded body and a rod-shaped elastic body obtained by resin-processing a nylon monofilament string having a diameter of 2.5 mm are inserted into both sides of a thin metal tube and caulked to form an element. By using these eight elements and inserting them, a segment [FIG. 2 (B)] is formed by insert molding. A roll is manufactured according to a specification in which the segment is keyed to a shaft having 12 key grooves on its peripheral surface.

The brush roll thus obtained was set on a brush roll stand, and the rotation speed was 1200 rpm and 2
The steel plate is passed through the steel plate at a rate of 30 m / min while being pressed down by mm, and is ground while being sprinkled with water. 100m of ground steel plate
Cut out to m-square size and measure the weight. The steel sheet before grinding is cut into the same size and the weight is measured, and the difference between this and the weight of the steel sheet after grinding (grinding amount) is obtained. This value is converted per m ² . Also, after 10 hours of operation, the outer diameter of the roll is measured to obtain the amount of wear, and the amount of wear per hour is calculated.

The results obtained are as follows.

Grinding amount Abrasion amount gr / m ² mm / hr Roll of the present invention 22 0.06 Comparative roll 14 0.10 As is apparent from the above test example, the present invention has a polishing power superior to that of the prior art and high. Abrasion resistance can be obtained.

[0037]

As described above, according to the present invention, in the abrasive body of the brush roll by the bristle of the filament yarn or by the rod-shaped body, which has abrasive particles as the abrasive element, the abrasive force is improved and the abrasion resistance is improved as compared with the conventional one. It has the effect of increasing wear resistance.

[Brief description of drawings]

FIG. 1 (A) is a perspective view showing an example of bristles as a polishing body according to the present invention, and FIG. 1 (B) is a perspective view showing an example of a rod-shaped body as another example of a polishing body according to the present invention. It is a figure. The bristles in FIG. 1 (A) are shown substantially enlarged.

2 (A) is a perspective view showing an example of a disk as a brush roll element in which the bristle of FIG. 1 (A) is bristled, and FIG. 2 (B) is a plan view of the abrasive body of FIG. 1 (B). It is a front view which shows an example of the disk segment as a brush roll element which was installed.

FIG. 3 is a front view showing an outline of a brush roll made using the brush roll element shown in FIGS. 2A and 2B and FIG. 5 below.

FIG. 4 shows a longitudinal sectional view of the disc segment of FIG. 2 (B).

FIG. 5 (A) shows another example of a brush roll element.
It is a perspective view of the member which flocked the bristle of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Abrasive body 1a Bristle of filament yarn as the same abrasive body 1b Rod-shaped body as the same abrasive body 10 Abrasive particles in the same abrasive body 11 Extreme pressure additive in the same abrasive body 21 Bristle flocking disk as a brush roll element 21 'Brush Bristle flocking member as roll element 22 Disk segment R as brush roll element R Brush roll

Claims (6)

[Claims] 1. A brush roll abrasive body made of bristle made of filament yarn made by mixing an extreme pressure additive together with abrasive particles into a resin. 2. A brush roll abrasive body made of a rod-shaped body made by mixing an extreme pressure additive together with abrasive particles into a resin. 3. The content of abrasive particles mixed is 5 to 40% by weight,
The polishing body according to claim 1, wherein the amount of the resin is 60% by weight or more, and the amount of the extreme pressure additive mixed is 0.05 to 5% by weight with respect to the amount of the abrasive particles. 4. A brush roll comprising the abrasive body according to claim 3 as a constituent element. 5. The amount of abrasive particles mixed is 5 to 90% by weight,
The amount of the resin is 10% by weight or more, and the amount of the extreme pressure additive mixed is 0.05 to 5% by weight based on the amount of the abrasive particles.
Abrasive body described. 6. A brush roll comprising the abrasive body according to claim 5 as a constituent element.