JPS5925866A - Abrasive material for dry fluidized polishing - Google Patents

Abstract

PURPOSE:A novel abrasive material for dry fluidized polishing, prepared by sticking closely abrasive grains to the surface of an organic medium with an adhesive, and having improved grinding properties without giving surface hardening to a material to be polished. CONSTITUTION:An abrasive material for dry fluidized polishing obtained by adding a mixture prepared by mixing 7-25wt%, based on the organic medium, adhesive, e.g. vinyl acetate type emulsion, with 10-35wt%, based on the organic medium, abrasive grains, e.g. emery powder, to the organic medium, e.g. wood, having preferably 0.01-6mm. diameter, mixing them under stirring, bonding the abrasive grains to the surface of the organic medium with the adhesive, and drying the resultant coated organic medium.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel abrasive material used in dry flow polishing such as dry barrel polishing, and more specifically, it involves fixing abrasive grains to the surface of organic media using an adhesive. The present invention relates to an abrasive material for dry flow polishing which has excellent grinding properties and does not cause surface hardening to the object to be polished.

Traditionally, we have been removing burrs and burrs from metal and synthetic resin products.
Barrel polishing, planetary barrel polishing, spin finishing, reciprocating polishing, gyro polishing, etc. are used for grinding and polishing, and in the case of Bali burr removal, wet methods are mainly used. IF compliance method was adopted, and water and water were used as polishing materials.
Abrasive stones (natural stone, synthetic mineral media or plastic media) and compounds with anti-rust and oil-sliding properties are used. However, this method hardens the surface of the metal, making it difficult to achieve a mirror-like finish in the puffing process performed after barrel polishing.Additionally, since it uses water, it creates wastewater problems and has the disadvantage of increasing wastewater treatment costs. . In addition, dry barrel polishing, which uses an abrasive mixture of oil and abrasive grains added to organic media, and spin finishing, which uses media pre-coated with oil and abrasives, are mainly used for semi-finishing and final finishing. These methods are used for various purposes, and all of these methods can produce a mirror finish close to that of a buffing stone, but they are also used for rough grinding, burr removal, or heavy grinding, such as endless belt #180 [F, emery buff #200 or less] Finishing was practically impossible.

The inventors of the present invention, aware of the above circumstances, conducted intensive research to obtain a material for dry fluid polishing that does not harden the surface of the object to be polished and has high grindability. The inventors have discovered that the above object can be effectively achieved by fixing the abrasive grains using an agent, and have come up with the present invention.

That is, according to the results of the studies conducted by the present inventors, dry flow polishing materials used in conventional dry barrel polishing, spin finishing, etc. are made by adding an abrasive agent that is a mixture of oil and abrasive grains to organic media. However, it was acknowledged that these types of media have inferior grinding power because the heat of polishing dissolves the oil and releases the abrasive grains. In contrast, in the abrasive material of the present invention, the abrasive grains are fixed to an organic media, and the material to be polished can be deeply ground by the elasticity of the organic media and the abrasive force of the abrasive grains fixed to the surface. It was discovered that the abrasive material of the present invention can be ground without causing scratches or surface hardening, and the abrasive material of the present invention can be used in conventional dry barrel polishing and spin finishing in which abrasive grains are attached to organic media with oil. The composition and the mechanism of polishing action are completely different from those of other polishing materials or wet barrel polishing stones.

The present invention will be explained in more detail below.

The abrasive material for dry flow polishing of the present invention is an organic media coated with abrasive grains using an adhesive, and has high abrasive properties and can be polished without causing surface hardening to the object to be polished. What you get is dry barrel polishing,
It is suitably used in dry flow polishing such as vibrating barrel polishing, planetary barrel polishing, spin finishing, reciprocating finishing, gyro finishing, and dry blasting.

In this case, the organic media may be one or a mixture of small pieces or powders of wood, bamboo, nuts, bark, cob/meal, corn/cob, cloth, natural or artificial leather, etc. Can be used.

Note that the size of the organic media depends on the purpose of use, and various sizes from fine powder to coarse particles can be used, but the diameter is usually 10 mm or less, preferably 0.5 mm in diameter.
Types from 01 to 6 are used.

Adhesives include gelatin, sodium nitric acid, adhesives (oil-based, asphalt-based), vinyl acetate emulsions, styrene-butadiene emulsions, acrylic adhesives such as CR/I/John, etc.
Water-soluble alkyd resin, water-soluble acrylic resin, hinyl chloride resin, carboxymethyl cellulose, epoxy resin,
Polyester, polyurethane, phenolic resin, area resin, melamine resin, unsaturated polyester, steel resin, acrylic resin, carbon resin, polyethylene, polyamide, etc. water-soluble, oil-soluble, emulsion type, solvent type, hardener added One or a mixture of two or more types of known natural or synthetic adhesives such as molds and other polymerized adhesives can be used. In addition, when using a mixture of adhesives, for example, as an emulsion type, a mixture of a vinyl acetate type adhesive and an acrylic type emuldimine, and as a solvent type, a mixture of an alkyd resin and an oil type varnish is preferably used. Also, the amount of adhesive used is 5% for organic media.
~50% (weight %, the same applies hereinafter), particularly 7~25%, is preferred for maintaining adhesive strength.

Furthermore, 1 abrasive grains include calcium carbonate, clay powder, kaolin, silica, bentonite, aluminum oxide, chromium oxide, iron oxide, red iron oxide, emery powder, tripoli powder, quartzite earth, titanium oxide, zircon, whithiarandom, and alundum. One or a mixture of two or more of natural and synthetic abrasives such as , green carborundum, carborundum, and garnet can be used. In this case, the amount of abrasive grains used is 5 to 40% of the organic media.
In particular, it is preferable to set it to 10 to 85% in order to increase the grinding force. Further, the particle size of the abrasive grains can be selected from various sizes depending on the purpose of polishing. In the present invention, heavy grinding can be reliably performed by using abrasive grains with a large particle size (coarse), for example, emery powder of #180 or less, and therefore, abrasive grains with a large particle size can be suitably used.

The method for manufacturing the abrasive material of the present invention is to add adhesive dissolved in a solvent to organic media in an amount greater than the amount that the organic media can absorb, so that the organic media absorbs the adhesive, so that the surface of the organic media is completely coated with adhesive. After that, add abrasive grains to the organic media coated with the adhesive, dry the moisture if the adhesive is glue or emulsion type, If it is a synthetic adhesive, a method of obtaining an abrasive material by curing it can be adopted. In this case, it is preferable to add abrasive grains in an amount that completely covers the surface of the media coated with the adhesive or more. If the amount of abrasive grains is too small, the media will stick to each other and it will be necessary to reframe it after drying. However, the use of adhesive and abrasive grains in the amounts described above ensures that an abrasive material having a size comparable to that of the media used during mixing is obtained.

In addition, as another method for producing the abrasive material of the present invention, a premixed mixture of type 1 adhesive and abrasive grains is added to organic media, mixed and stirred, and the abrasive grains are adhesively coated on the surface of the media with an adhesive. It is also possible to suitably employ a method of drying this.

Note that an adhesive can be further applied to one surface of the abrasive material of the present invention, thereby further increasing the adhesive strength between the organic media and the abrasive grains. In this case, the same adhesive as mentioned above can be used.

Furthermore, in the abrasive material of the present invention, oils and fats can be applied to the surface of the media to which the abrasive grains are adhered, or the surface of the media is further coated with an adhesive, thereby providing smooth, high-level grindability and gloss. It is possible to apply force to the abrasive material at the same time, which can further improve work efficiency. This abrasive material coated with oils and fats is suitably used when performing mirror finishing in post-processing, or when performing mirror finishing using only the abrasive material of the present invention. Incidentally, the oils and fats include animal, vegetable, and mineral oils, various fatty acids, waxes, metal soaps, and the like, and one type or a mixture of two or more of these can be used.

As explained above, the abrasive material of the present invention has excellent abrasiveness that cannot actually be obtained with the conventional dry method by fixing abrasive grains to the surface of the organic media using an adhesive. Moreover, while the conventional wet barrel method imparts surface hardening to the object to be polished, the abrasive material of the present invention does not impart surface hardening. That is, the abrasive material of the present invention has excellent abrasiveness because it cuts the object to be polished while the abrasive grains are firmly adhered to the media, and since the base material is an organic media, it has appropriate elasticity. It has fluidity and does not cause deep grinding scratches or surface hardening on the abrasive material. Furthermore, with conventional dry barrel abrasive materials, only minute cuts can be obtained on metal, and deburring is practically impossible, and those for spin finishing require #250 belt or finer mesh. Previously, only groundwork could be finished, but by using the abrasive material of the present invention, it is now possible to remove burrs and burrs, perform heavy grinding, and provide a grinding condition equivalent to belt grinding or emery grinding. Moreover, it can be easily finished to a mirror finish by post-processing such as puff polishing, dry barrel polishing, and spin finishing.
As shown in Figure 1, it can be used in a wide range of applications, such as removing the traces left by the base grinding with the #180 belt, and has the advantage of greatly shortening the polishing process. Furthermore, the abrasive material of the present invention can be used in all types of dry fluid polishing and has the advantage that it does not suffer from the waste water problems that occur in wet polishing.

Furthermore, as mentioned above, when an adhesive is further applied to the surface of the media to which the abrasive grains have been adhered, the adhesion between the organic media and the abrasive grains is very strong, so the grinding power is even higher. In addition, media with abrasive grains bonded to it, or media coated with adhesive on top of which oils and fats are further applied, have smooth, high-level grindability and gloss-imparting power at the same time. It can be used very effectively as a material.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to examples, but the present invention is not limited to the following examples.

2 [Example 1] Put vinyl acetate emulsion 71C9 into a mixing pot, add 8 kg of #250 emery powder, and mix well. Next, 85 kg of corn cobs (corn cobs) with a diameter of 5 to 7 mm are added to the mixture and mixed.

This was placed in a shallow container and dried at 80°C for 30 minutes to obtain an abrasive material.

Alternatively, use the same materials as above, but put vinyl acetate emulsion in a mixing pot, add corn cob and mix, then add emery powder and mix well, and add this to the above. A similar abrasive material was obtained by drying in the same manner.

In all of the abrasive materials obtained by the above method, the adhesive is absorbed into the corn/cob, and the emery powder is adhered to the surface of the organic media. It did not fall off easily. ◎ [Example 2] Corn cobs 8 (19) having a diameter of about 0.5 mm were added to 8 kg of 25% glue aqueous solution and mixed to allow the corn cobs to absorb the glue aqueous solution well. Next, add #280 Alundum 12 to this
Add Pr9 and mix well. This was placed in a shallow container and dried at 60°C for 2 hours to obtain an abrasive material.

[Example 8] Add 0.719 curing agent to epoxy resin 7Ic9, mix well, and add h
Add 470 ~ and mix. Next, #180 Alundum 22Tc9 is added and mixed. This was placed in a shallow container and cured, and taken out after 24 hours to obtain an abrasive material. [Example 4] Add thinner 10 to 9 to alkyd resin face 15 to
To this, 65~ of walnuts, which have been crushed into pieces approximately one fin in diameter, are added and mixed. Next, 20% of alumina is added and mixed to form powder. This was placed in a shallow container and dried at 60° C. for 1 hour to obtain an abrasive material.

[Example b]

The abrasive material of Example 2 was coated with a 25% aqueous glue solution using a sprayer, and this was dried to obtain an abrasive material.

This polishing material was found to have very high adhesion strength of the abrasive grains to the organic media.

[Example 6] 9 was added to the abrasive material 50 of Example 1 in a mixing pot, and 5 and 9 were added to stearic acid as oil and fat, and mixed well to obtain an abrasive material whose surface was coated with oil and fat.

An abrasive material whose surface was coated with oil and fat was obtained.

Note that although the above examples are examples in which adhesive and abrasive grains are used alone, it is also possible to use two or more types of adhesives and abrasive grains.
good. For example, an emulsion-type mixed adhesive of a vinyl acetate emulsion and an acrylic resin emulsion or a solvent-type mixed adhesive of an alkyd resin and an oil-based resin can be used. Other adhesives can also be applied to the abrasive materials described above to maintain the adhesive strength of the abrasive grains.

Next, an example of the use of the abrasive material according to the above embodiment will be shown, and the effects of the present invention will be specifically explained.

[Usage Example 1] Using the polishing material of Example 8, dry barrel polishing was performed under the conditions shown in Table 1. In addition, for comparison, we conducted polishing with a dry barrel and a wet barrel using conventional media to examine the polishing effect.In this case, 180r-1O
Twenty Ni spoons were used as objects to be polished, and before being put into the barrel, they were degreased with Tri-Clean, and then the weight of each spoon was measured. After polishing, the spoons were degreased with Tri-Clean, and then the weight was measured in the same way. The difference in weight between hits was determined and used as the amount of grinding.

Further, the barrel rotation speed was 25 rpm, and polishing was performed for 1 hour. The results are shown in Table 1. In addition, the results are 2
0 indicated by the average grinding mass of 0 5 Rice: Both are manufactured by Uezai Kogyo ■, U oil is mainly made of mineral thread, U powder is mainly made of Sin, and Swivela 2000 has a fatty acid surface. It is mainly based on Ken.

From the results in Table 1, dry barrel polishing using the abrasive material of the present invention has a grinding force approximately 14 times that of dry barrel polishing using conventional media, and has a grinding force close to that of wet barrel polishing. was recognized.

Furthermore, when these spoons were puff-finished, the spoons polished with the abrasive material of the present invention easily achieved the same gloss as those polished with conventional dry media, but those polished with wet barrels did not. The surface was hardened and had deep scratches. [Usage Example 2] #250 emery powder was attached to the surface of the abrasive material of Example 1 and the corn/cob with a diameter of 5 to 70 for comparison using oil (stearic acid). Polishing was performed using a spin finish using polishing materials.

The device used was Spinmax (manufactured by Uezai Kogyo ■), and the crank of an aluminum bicycle was used as the polishing tool.

The number of cranks is 6, and the base is ground with a #18° belt. The polishing conditions were as follows: 60 tons of polishing material, polishing time of 2 minutes in forward rotation and 2 minutes in reverse rotation for a total of 4 minutes.

After polishing, we visually judged the extent to which the traces of the base grinding of the #180 belt had been removed, and found that the belt grinding marks were completely removed from the crank polished with the grinding stone material of the example machine, but when using the conventional abrasive material. The one that was polished had traces of Velshi grinding left on the entire crank.

From the above results, it was confirmed that the abrasive material of the present invention has excellent abrasive strength, and the conventional abrasive material has at most #2
Although it was possible to polish only about 50-sized particles, with the material of the present invention, even #180-sized particles can be reliably removed in a short time, so the polishing process can be greatly shortened. It was discovered.

[Use Example 8] When a crank was polished in the same manner as in Use Example 2 using the abrasive material of Example 6, the belt grinding marks were completely removed and the polished object was given a gloss. It was recognized that the finish was excellent.

Ex-Person: Uemura Kogyo Co., Ltd. Agent: Patent Attorney Takashi Kojima

Claims (1)

[Claims] 1. An abrasive material for dry fluid polishing, characterized in that abrasive grains are fixed to the surface of an organic medium using an adhesive. 2. Organic media consisting of one or more powders or pieces selected from wood, bamboo, nuts, tree bark, cob/meal, corn/cob, cloth, and artificial and natural leathers. Claim 1 used
Abrasive materials as described in section. 6. Glue, gelatin, sodium silicate as adhesives,
Fes, vinyl acetate emulsion, styrene-butadiene emulsion, acrylic emulsion, water-soluble alkyd resin, water-soluble acrylic resin, vinyl chloride resin, carboxymethyl cellulose, epoxy resin, polyester, polyurethane, phenol/L' resin, Area resin, melamine resin, unsaturated polyester \ Styro A
3. The abrasive material according to claim 1 or 2, which uses one or more adhesives selected from I resin, acrylic resin, hard resin, polyethylene, and polyamide. France Abrasive grains include calcium carbonate, clay powder, kaolin, silica, bentonite, aluminum oxide, chromium oxide, iron oxide, red iron oxide, emery powder, tripoli powder, diatomaceous earth, titanium oxide, zircon, white alundum, alundum, green The abrasive material according to any one of claims 1 to 8, which uses one or more abrasive grains selected from carborundum, carborundum, and garnet. Claim 1 in which the left surface is further coated with an adhesive
The abrasive material according to any one of items 1 to 4. 6. The abrasive material according to any one of claims 1 to 4, the surface of which is further coated with an oil or fat. 7. The abrasive material according to any one of claims 1 to 4, wherein the surface of the abrasive material is further coated with an adhesive and an oil or fat is coated thereon. 8. The abrasive material is for dry barrel polishing, vibrating barrel polishing, planetary barrel polishing, spin finishing, reciprocating finishing, gyro finishing, or dry blasting, according to any one of claims 1 to 7. abrasive material.