JP2890046B2 - PVA grinding wheel and method of manufacturing the same - Google Patents
PVA grinding wheel and method of manufacturing the sameInfo
- Publication number
- JP2890046B2 JP2890046B2 JP12688089A JP12688089A JP2890046B2 JP 2890046 B2 JP2890046 B2 JP 2890046B2 JP 12688089 A JP12688089 A JP 12688089A JP 12688089 A JP12688089 A JP 12688089A JP 2890046 B2 JP2890046 B2 JP 2890046B2
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- water
- alcohol resin
- soluble polyvinyl
- resin powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、弾性，屈曲性にすぐれ、砥粒率の高いPVA
砥石及びその製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a PVA having excellent elasticity and flexibility and a high abrasive grain ratio.
The present invention relates to a grindstone and a manufacturing method thereof.
PVA砥石は、金属類の鏡面仕上，光学部品の最終仕
上、電子部品の精密研摩、曲面機械一般研摩に用いられ
ている。従来のPVA砥石は、ポリビニルアルコール樹
脂、砥粒及び発泡剤を混合し、所定の金型で発泡成型す
ることにより製造されている。しかし、得られたPVA砥
石は、その可撓性及び内部に気泡を有する為、研摩時等
一時的な応力が集中すると脆くて欠けることがたびたび
発生するという問題があった。PVA grinding wheels are used for mirror finishing of metals, final finishing of optical components, precision polishing of electronic components, and general polishing of curved surface machines. A conventional PVA grindstone is manufactured by mixing a polyvinyl alcohol resin, abrasive grains, and a foaming agent, and subjecting the mixture to foam molding using a predetermined mold. However, the obtained PVA grindstone has the problem that it is fragile and often chipped when a temporary stress is concentrated, such as during polishing, because of its flexibility and the presence of bubbles inside.
そこで、上記PVA砥石の脆さをカバーする為に繊維の
混入が考えられる。例えば、合成繊維からなる不織布に
ポリビニルアルコール樹脂を含浸する場合、ポリビニル
アルコール樹脂は高粘度の為、砥粒の分散が悪く、濃度
を低くして用いる必要があった。従って、砥粒率などを
考慮すると、不織布ウエブのW.P.Uが多くなり、含有水
分量が多くなる為、湿潤状態でロール状に巻締めた場
合、ロール中心部の水分を飛散させるのに長時間を要
し、生産性が極度に低下する。また、砥粒率を高めるこ
とも十分にできないという問題があった。Then, in order to cover the brittleness of the above-mentioned PVA grindstone, mixing of fibers is conceivable. For example, when impregnating a non-woven fabric made of synthetic fiber with a polyvinyl alcohol resin, the polyvinyl alcohol resin has a high viscosity, so that the dispersion of the abrasive grains is poor, and it has been necessary to use a low concentration. Therefore, considering the abrasive grain ratio, etc., the WPU of the nonwoven fabric web increases, and the water content increases, so when the roll is tightened in a wet state in a roll, it takes a long time to disperse the water in the center of the roll. In short, productivity is extremely reduced. Further, there is a problem that the abrasive grain ratio cannot be sufficiently increased.
本発明は、上記欠点を改良するものであり、水溶性ポ
リビニルアルコール繊維100％でウエブを形成し、ポリ
ビニルアルコール樹脂溶液の散布により仮止めし、不織
布を形成した後、上記仮止め不織布を構成する繊維表面
に粘着剤を付与し、水溶性ポリビニルアルコール樹脂粉
体，砥粒混合物を散布により充填固着せしめ、次に水の
散布によって上記水溶性ポリビニルアルコール樹脂粉体
を膨潤溶解すると共に、湿潤状態となし、ロール状に巻
締め、乾燥加熱を行うことにより課題を解消したもので
ある。The present invention is intended to improve the above-mentioned drawbacks. A web is formed from 100% of water-soluble polyvinyl alcohol fiber, and the web is temporarily fixed by spraying a polyvinyl alcohol resin solution to form a non-woven fabric. An adhesive is applied to the fiber surface, and a water-soluble polyvinyl alcohol resin powder and an abrasive mixture are filled and fixed by spraying. Then, the water-soluble polyvinyl alcohol resin powder is swelled and dissolved by spraying water, and a wet state is obtained. None, the problem was solved by winding in a roll and drying and heating.
以下、本発明の一実施例を図面に従って詳細に説明す
る。Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
ランドウェバー機、又はクロスラッパー等のウエブ形
成機により形成した水溶性ポリビニルアルコール繊維10
デニール×カット長51mm、重量120g/m2のランドウェブ
に下記配合の樹脂結合剤液を片面10g/m2づつ散布して仮
止め不織布（１）を作成する。Water-soluble polyvinyl alcohol fiber 10 formed by a web forming machine such as a land webber machine or a cross wrapper
A resin binder solution having the following composition is sprayed on a land web having a denier × cut length of 51 mm and weighing 120 g / m 2 at a rate of 10 g / m 2 on each side to prepare a temporarily fixed nonwoven fabric (1).
樹脂結合剤配合 ポリビニルアルコール 60部 メ ラ ミ ン 40部 樹脂固形分濃度 25％ 次に上記仮止め不織布に粘着剤（２）として合成樹脂
エマルジョンや水溶性樹脂例えば水溶性ポリビニルアル
コールを用いて含浸した後、サンドホッパ（３）で下記
に示す配合比率で砥粒を混合した硬化剤を含む水溶性ポ
リビニルアルコール樹脂粉体（４）を所定量、例えば、
450g/m2散布により付着させる。Resin binder compounding Polyvinyl alcohol 60 parts Melamine 40 parts Resin solid content concentration 25% Next, the above temporarily fixed nonwoven fabric was impregnated with a synthetic resin emulsion or a water-soluble resin such as water-soluble polyvinyl alcohol as an adhesive (2). Then, a predetermined amount, for example, of a water-soluble polyvinyl alcohol resin powder (4) containing a hardener obtained by mixing abrasive grains in a mixing ratio shown below in a sand hopper (3), for example,
Attached by spraying 450 g / m 2 .
なお、この砥粒混合ポリビニルアルコール樹脂粉体は
ポリビニルアルコールを溶解させスラリー状にしたもの
を乾燥させてできる被膜で覆われた砥粒を使用してもよ
い。The abrasive grains mixed polyvinyl alcohol resin powder may be an abrasive grain coated with a film formed by dissolving polyvinyl alcohol into a slurry and drying the slurry.
ポリビニルアルコール樹脂粉体 30％ 砥 粒 70％ このようにして形成された研摩基材は次にスプレー装
置（５）により水を片面20g/m2散布して不織布表面及び
内部のポリビニルアルコール樹脂粉体を膨潤溶解させて
砥粒を強固に固着させると共に渦巻き円筒状態での巻取
を容易となし、湿潤状態で巻取りロール（６）で以て内
径5cmのフエノール製コア（７）に張力を加えながら渦
巻状に巻き付けてラフ外径350mm、密度0.5g/cm3となる
ように巻締める。次に上記渦巻きロールを温度150℃の
乾熱処理炉でキュアを行なって熱処理を完了する。Polyvinyl alcohol resin powder 30% Abrasive particles 70% The abrasive substrate thus formed is then sprayed with water at a rate of 20 g / m 2 on one side using a spray device (5) to spray polyvinyl alcohol resin powder on the surface and inside of the nonwoven fabric. Swells and dissolves to firmly fix the abrasive grains, facilitates winding in a spiral cylindrical state, and applies tension to a phenolic core (7) having an inner diameter of 5 cm with a winding roll (6) in a wet state. Then, wind it in a spiral shape and tighten it to a rough outer diameter of 350 mm and a density of 0.5 g / cm 3 . Next, the spiral roll is cured in a dry heat treatment furnace at a temperature of 150 ° C. to complete the heat treatment.
得られた渦巻き状ロールは製品巾50mmに輪切り裁断し
外径305mmの第２図に示すPVA砥石（８）を形成した。な
お、砥粒：ポリビニルアルコール樹脂の混合比率は85:1
5〜50:50の範囲で適用することができる。The obtained spiral roll was cut into a ring having a product width of 50 mm to form a PVA grinding stone (8) shown in FIG. 2 having an outer diameter of 305 mm. The mixing ratio of abrasive particles: polyvinyl alcohol resin was 85: 1.
It can be applied in the range of 5 to 50:50.
本発明により得られたPVA砥石は第３図に示す如く、
相互に交差，接触する水溶性ポリビニルアルコール繊維
（９）の表面に付着した粘着剤（10）によって固着され
た砥粒（11）は同時に散布付着した水溶性ポリビニルア
ルコール樹脂粉体（12）の溶解により強固に固着され、
砥粒率が高く緻密で弾性があり、研削，研摩性に優れた
砥粒率55％の砥石を構成する。As shown in FIG. 3, the PVA grinding wheel obtained by the present invention
The abrasive grains (11) fixed by the adhesive (10) adhered to the surface of the water-soluble polyvinyl alcohol fibers (9) that intersect and contact each other dissolve the water-soluble polyvinyl alcohol resin powder (12) that is simultaneously sprayed and adhered. Is firmly fixed by
A grindstone with a high abrasive grain rate of 55%, which is dense and elastic, has excellent grinding and polishing properties.
本発明は上記の如く水溶性ポリビニルアルコール樹脂
粉体を砥粒の固着剤として湿潤状態で用いることによ
り、従来のポリビニルアルコール樹脂・砥粒スラリー液
の如くロール体に巻締め時の乾燥、硬化に長時間要する
ことなく短時間で済ませることができ生産効率を大巾に
高める事ができる。又、砥粒とポリビニルアルコール樹
脂粉体との混合散布により砥石中に含有される砥粒率が
高くなり、研摩，研削能力が向上し、砥石を構成する骨
格繊維に水溶性ポリビニルアルコール繊維製不織布を用
いたことにより弾性を有し、被研削面にもよくなじみ、
欠け、割れ等の発生も防止される等の優れた効果を有す
るものである。The present invention uses a water-soluble polyvinyl alcohol resin powder in a wet state as a binder for abrasive grains as described above, so that it can be dried and hardened when it is wound around a roll like a conventional polyvinyl alcohol resin / abrasive slurry liquid. It can be completed in a short time without requiring a long time, and the production efficiency can be greatly increased. Also, by mixing and dispersing the abrasive grains and polyvinyl alcohol resin powder, the ratio of the abrasive grains contained in the grindstone is increased, and the polishing and grinding ability is improved. Has elasticity due to the use of
It has excellent effects such as preventing the occurrence of chipping and cracking.
第１図は本発明の実施の一例を示す製造工程図、第２図
は同実施により得られた砥石の斜視図、第３図は第２図
の要部拡大断面図である。 （１）……仮止め不織布、（２）……粘着剤 （３）……サンドホッパ （４）……砥粒混合ポリビニルアルコール樹脂粉体 （５）……スプレー装置、（６）……巻取りロール （７）……フエノール製コア、（８）……PVA砥石 （９）……水溶性ポリビニルアルコール繊維 （10）……粘着剤、（11）……砥粒 （12）……ポリビニルアルコール樹脂粉体1 is a manufacturing process diagram showing an embodiment of the present invention, FIG. 2 is a perspective view of a grindstone obtained by the embodiment, and FIG. 3 is an enlarged sectional view of a main part of FIG. (1)… Temporary non-woven fabric, (2)… Adhesive (3)… Sand hopper (4)… Abrasive mixed polyvinyl alcohol resin powder (5)… Spray device, (6)… Winding Roll (7): Core made of phenol, (8): PVA grinding stone (9): Water-soluble polyvinyl alcohol fiber (10): Adhesive, (11): Abrasive grains (12): Polyvinyl alcohol resin powder
Claims (2)
ら成る砥石の構成繊維表面に、砥粒が粘着剤と水溶性ポ
リビニルアルコール樹脂粉体とで以て固着されたことを
特徴とするPVA砥石。1. A PVA grinding stone characterized in that abrasive grains are fixed to the surface of the constituent fibers of the grinding stone made of a water-soluble polyvinyl alcohol fiber nonwoven fabric with an adhesive and a water-soluble polyvinyl alcohol resin powder.
ウェブにポリビニルアルコール樹脂結合剤液を散布して
仮止め不織布を形成し、この仮止め不織布に、粘着剤を
付与し、さらに砥粒混合水溶性ポリビニルアルコール樹
脂粉体を均一に散布して研摩基材を形成した後、次に上
記研摩基材に水分を付与して表面及び内部の水溶性ポリ
ビニルアルコール樹脂粉体を膨潤溶解すると共に、湿潤
状態でロール状に巻締め、更に乾燥加熱することを特徴
とするPVA砥石の製造方法。2. A temporarily-fixed nonwoven fabric is formed by spraying a polyvinyl alcohol resin binder solution on a web of water-soluble polyvinyl alcohol fibers, an adhesive is applied to the temporarily-fixed nonwoven fabric, and abrasive grains mixed with water-soluble polyvinyl alcohol. After uniformly dispersing the alcohol resin powder to form the polishing substrate, the surface and the internal water-soluble polyvinyl alcohol resin powder are swelled and dissolved by applying water to the polishing substrate, and in a wet state. A method for producing a PVA whetstone, comprising winding in a roll shape, followed by drying and heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12688089A JP2890046B2 (en) | 1989-05-20 | 1989-05-20 | PVA grinding wheel and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12688089A JP2890046B2 (en) | 1989-05-20 | 1989-05-20 | PVA grinding wheel and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02311273A JPH02311273A (en) | 1990-12-26 |
| JP2890046B2 true JP2890046B2 (en) | 1999-05-10 |
Family
ID=14946132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12688089A Expired - Fee Related JP2890046B2 (en) | 1989-05-20 | 1989-05-20 | PVA grinding wheel and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2890046B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4150077B2 (en) * | 1996-05-03 | 2008-09-17 | スリーエム カンパニー | Method and apparatus for manufacturing abrasive products |
| WO1997042005A1 (en) * | 1996-05-03 | 1997-11-13 | Minnesota Mining And Manufacturing Company | Nonwoven abrasive articles |
| EP0912293B1 (en) * | 1996-05-03 | 2003-03-26 | Minnesota Mining And Manufacturing Company | Method of making a foraminous abrasive article |
| US5849051A (en) * | 1997-11-12 | 1998-12-15 | Minnesota Mining And Manufacturing Company | Abrasive foam article and method of making same |
| JP4601804B2 (en) * | 2000-11-20 | 2010-12-22 | ソニー株式会社 | Polishing wheel and method for manufacturing polishing wheel |
-
1989
- 1989-05-20 JP JP12688089A patent/JP2890046B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02311273A (en) | 1990-12-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |