JPH02311273A - Pva grinding stone and manufacture of this - Google Patents
Pva grinding stone and manufacture of thisInfo
- Publication number
- JPH02311273A JPH02311273A JP12688089A JP12688089A JPH02311273A JP H02311273 A JPH02311273 A JP H02311273A JP 12688089 A JP12688089 A JP 12688089A JP 12688089 A JP12688089 A JP 12688089A JP H02311273 A JPH02311273 A JP H02311273A
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- alcohol resin
- nonwoven fabric
- water
- soluble polyvinyl
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000227 grinding Methods 0.000 title abstract description 6
- 239000004575 stone Substances 0.000 title abstract 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 41
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 41
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 239000006061 abrasive grain Substances 0.000 claims description 19
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011230 binding agent Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract description 2
- 239000010419 fine particle Substances 0.000 abstract 2
- 239000007767 bonding agent Substances 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 238000005498 polishing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 125000002587 enol group Chemical group 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Polishing Bodies And Polishing Tools (AREA)
Abstract
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、研摩特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。[Detailed Description of the Invention] [Industrial Application Field] The present invention uses PVA that has excellent elasticity and flexibility and has a high abrasive grain rate.
Regarding grindstones and their manufacturing methods PVA grindstones are used for mirror finishing of metals, final finishing of optical parts, precision polishing of electronic parts, and general polishing of curved machines. conventional PVA
A grindstone is manufactured by mixing polyvinyl alcohol resin, abrasive grains, and a foaming agent, and foam-molding the mixture in a predetermined mold. However, the resulting PVA grindstone has a problem in that it is brittle and often breaks when temporary stress is concentrated during polishing because of its flexibility and the presence of air 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、不織布ウェブの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。Therefore, in order to compensate for the brittleness of the PVA grindstone, it is considered that fibers are mixed in. For example, when a nonwoven fabric made of synthetic fibers is impregnated with a polyvinyl alcohol resin, since the polyvinyl alcohol resin has a high viscosity, it is difficult to disperse abrasive particles, so it is necessary to use the resin at a low concentration. Therefore, when considering the abrasive grain rate, etc., the W, P, and U content of the nonwoven fabric web increases, and the moisture content increases. It takes a long time to complete the process, and productivity is extremely reduced. Further, there was a problem that the abrasive grain ratio could not 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％でウェブを形成し、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
に粘着性を付与し、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
散布により湿潤状態となし、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 aims to improve the above-mentioned drawbacks, and involves forming a web with 100% water-soluble polyvinyl alcohol fibers, temporarily fixing the web by spraying a polyvinyl alcohol resin solution to form a nonwoven fabric, and then constructing the temporarily fixed nonwoven fabric. By imparting tackiness to the fiber surface, filling and fixing it by spraying water-soluble polyvinyl alcohol resin powder and abrasive grain mixture, then making it wet by spraying water, tightening it into a roll shape, and drying and heating. This problem has been resolved.
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, one embodiment of the present invention will be described in detail with reference to the drawings.
・ランドウエバー機、又はクロスラッパー等のウェブ形
成機により形成したポリビニルアルコール繊維１０デニ
ール×カツト長５１ｍｍ、重量１２０ｇ／ｒｄのランド
ウェブに下記配合の樹脂結合剤液を片面１０ｇ／ｒｒｉ
づつ散布して仮止め不織布（１）を作成する。・A land web of polyvinyl alcohol fiber 10 denier x cut length 51 mm, weight 120 g/rd formed by a web forming machine such as a land webber machine or a cross wrapper is coated with a resin binder liquid of the following composition at a rate of 10 g/rri on one side.
A temporarily fixed nonwoven fabric (1) is created by dispersing it in portions.
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ポリビニル
アルコール樹脂粉末（４）を所定量、例えば、４５０ｇ
／ｎ（散布により何着させる。Polyvinyl alcohol with resin binder 60 parts Melamine
40 parts Resin solid content concentration 25% Next, the above temporarily fixed nonwoven fabric is impregnated with a synthetic resin emulsion or a water-soluble resin such as water-soluble polyvinyl alcohol as an adhesive (2), and then the mixture ratio shown below is applied in a sand hopper (3). A predetermined amount, for example, 450 g, of polyvinyl alcohol resin powder (4) containing a hardening agent mixed with abrasive grains.
/n (How many clothes are made by spraying?
なお、この砥粒混合ポリビニルアルコール樹脂粉末はポ
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 polyvinyl alcohol resin powder mixed with abrasive grains may be abrasive grains covered with a film formed by dissolving polyvinyl alcohol into a slurry and drying it.
ポリビニルアルコール樹脂粉末 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／−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末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５ ｃｍの７
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３５０ ｍｍ、密度０．５ｇ／ｃＭとな
るように巻締める。次に上記渦巻きロールを温度１５０
°Ｃの朝熱処理炉でキコアを行なって熱処理を完了する
。Polyvinyl alcohol resin powder 30% abrasive grain
70% The thus formed abrasive base material is then sprayed with 20 g/- of water on each side using a spray device (5) to swell and dissolve the polyvinyl alcohol resin powder on the surface and inside of the nonwoven fabric, thereby firmly fixing the abrasive grains. This also facilitates winding in a spiral cylindrical state.
7 with an inner diameter of 5 cm using a winding roll (6) in a wet state.
While applying tension to the enol core (7), it is wound spirally so that the rough outer diameter is 350 mm and the density is 0.5 g/cM. Next, the above spiral roll was heated to a temperature of 150.
The heat treatment is completed by performing Kikoa in a heat treatment furnace at °C in the morning.
得られた渦巻き状ロールは製品ｒ１１５０ ｍｍに輪切
り裁断し外径３０５ ｍｍの第２図に示ｔ Ｐ Ｖ Ａ
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８５：１５〜５０：５０の範囲で
適用することかできる。The obtained spiral roll was cut into rings with a product r1150 mm and an outer diameter of 305 mm as shown in Fig. 2.
A grindstone (8) was formed. In addition, the mixing ratio of abrasive grains and polyvinyl alcohol resin can be applied in the range of 85:15 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α・によって固着された
砥粒αＤ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（イ）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。The PVA grindstone obtained by the present invention is as shown in Fig. 3.
The abrasive grains αD fixed by the adhesive α attached to the surfaces of the water-soluble polyvinyl alcohol fibers (9) that intersect and contact each other are made stronger by the dissolution of the water-soluble polyvinyl alcohol resin powder (a) that has been sprayed and attached at the same time. This grindstone has a high abrasive grain ratio, is dense and elastic, and has an abrasive grain ratio of 55% with 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稈により、
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か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。As described above, the present invention uses water-soluble polyvinyl alcohol resin powder as a fixing agent for abrasive grains in a wet state.
Unlike conventional polyvinyl alcohol resin/abrasive slurry liquids, it does not take a long time to dry and harden when wound onto a roll body, and can be completed in a short time, greatly increasing production efficiency. In addition, by mixing and dispersing abrasive grains and polyvinyl alcohol resin powder, the percentage of abrasive grains contained in the whetstone increases, improving polishing and grinding ability, and the skeleton fibers that make up the whetstone are made of water-soluble polyvinyl alcohol fiber nonwoven fabric. By using this material, it has elasticity, conforms well to the surface to be ground, and has excellent effects such as preventing the occurrence of chips, cracks, etc.
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FIG. 1 is a manufacturing process diagram showing an example of the implementation of the present invention, FIG. 2 is a perspective view of a grindstone obtained by the same implementation, and FIG. 3 is an enlarged sectional view of the main part of FIG. 2. (1)...Temporary nonwoven fabric (2)...Adhesive (3)...Sand hopper
Claims (2)
溶性ポリビニルアルコール繊維不織布の繊維表面に粘着
剤によって砥粒と水溶性ポリビニルアルコール樹脂粉体
とが均一に固着された研摩基材を構成し、該研摩基材が
湿潤状で渦巻状に巻締め一体に成型されてなることを特
徴とするＰＶＡ砥石。(1) Construct an abrasive base material in which abrasive grains and water-soluble polyvinyl alcohol resin powder are uniformly fixed to the fiber surface of a water-soluble polyvinyl alcohol fiber nonwoven fabric temporarily fixed with polyvinyl alcohol resin, and A PVA grindstone characterized by a wet abrasive base material that is integrally formed into a spiral shape.
ブを、ポリビニルアルコール樹脂で仮止めしてなる不織
布の表面に粘着剤を付与し、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固着せしめた後、次に
水分を付与して不織布表面及び内部に充填、保持せしめ
たポリビニルアルコール樹脂粉末膨潤溶解させ、更に湿
潤状態でロール状に巻締め固定したことを特徴とするＰ
ＶＡ砥石の製造方法。(2) A web made of water-soluble polyvinyl alcohol fibers is temporarily fixed with polyvinyl alcohol resin, and an adhesive is applied to the surface of the nonwoven fabric, and water-soluble polyvinyl alcohol resin powder mixed with abrasive grains is uniformly spread and fixed. After that, moisture is added to the nonwoven fabric to swell and dissolve the polyvinyl alcohol resin powder filled and held on the surface and inside of the nonwoven fabric, and then rolled and fixed in a roll shape in a wet state.
Manufacturing method of VA grindstone.
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 true JPH02311273A (en) | 1990-12-26 |
| JP2890046B2 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) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997042004A1 (en) * | 1996-05-03 | 1997-11-13 | Minnesota Mining And Manufacturing Company | Method of making a porous abrasive article |
| WO1997042005A1 (en) * | 1996-05-03 | 1997-11-13 | Minnesota Mining And Manufacturing Company | Nonwoven abrasive articles |
| WO1997042003A1 (en) * | 1996-05-03 | 1997-11-13 | Minnesota Mining And Manufacturing Company | Method and apparatus for manufacturing abrasive articles |
| US5849051A (en) * | 1997-11-12 | 1998-12-15 | Minnesota Mining And Manufacturing Company | Abrasive foam article and method of making same |
| JP2002154060A (en) * | 2000-11-20 | 2002-05-28 | Sony Corp | Polishing wheel, manufacturing method for polishing wheel and polishing method |
-
1989
- 1989-05-20 JP JP12688089A patent/JP2890046B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997042004A1 (en) * | 1996-05-03 | 1997-11-13 | Minnesota Mining And Manufacturing Company | Method of making a porous abrasive article |
| WO1997042005A1 (en) * | 1996-05-03 | 1997-11-13 | Minnesota Mining And Manufacturing Company | Nonwoven abrasive articles |
| WO1997042003A1 (en) * | 1996-05-03 | 1997-11-13 | Minnesota Mining And Manufacturing Company | Method and apparatus for manufacturing abrasive articles |
| US5863305A (en) * | 1996-05-03 | 1999-01-26 | Minnesota Mining And Manufacturing Company | Method and apparatus for manufacturing abrasive articles |
| US6007590A (en) * | 1996-05-03 | 1999-12-28 | 3M Innovative Properties Company | Method of making a foraminous abrasive article |
| US6017831A (en) * | 1996-05-03 | 2000-01-25 | 3M Innovative Properties Company | Nonwoven abrasive articles |
| US5849051A (en) * | 1997-11-12 | 1998-12-15 | Minnesota Mining And Manufacturing Company | Abrasive foam article and method of making same |
| JP2002154060A (en) * | 2000-11-20 | 2002-05-28 | Sony Corp | Polishing wheel, manufacturing method for polishing wheel and polishing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2890046B2 (en) | 1999-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |