JP2007331058A - Abrasive disc - Google Patents

Abrasive disc Download PDF

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Publication number
JP2007331058A
JP2007331058A JP2006165745A JP2006165745A JP2007331058A JP 2007331058 A JP2007331058 A JP 2007331058A JP 2006165745 A JP2006165745 A JP 2006165745A JP 2006165745 A JP2006165745 A JP 2006165745A JP 2007331058 A JP2007331058 A JP 2007331058A
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resin
abrasive
disk
disc
nonwoven fabric
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JP2007331058A5 (en
JP5448289B2 (en
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Michihiro Yamahara
通宏 山原
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3M Innovative Properties Co
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3M Innovative Properties Co
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Priority to JP2006165745A priority Critical patent/JP5448289B2/en
Priority to US12/303,984 priority patent/US20100190420A1/en
Priority to PCT/US2007/071189 priority patent/WO2007147039A1/en
Priority to EP07798549A priority patent/EP2035188A4/en
Publication of JP2007331058A publication Critical patent/JP2007331058A/en
Publication of JP2007331058A5 publication Critical patent/JP2007331058A5/ja
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/20—Mountings for the wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abrasive disc that has a small dimension in its thickness direction, easily polishes even narrow parts or groove side-faces, and has sufficient strength to resist a force applied during polishing. <P>SOLUTION: The abrasive disc is provided with: a disc-like laminated body 1 which has a layer composed of a nonwoven abrasive cloth 3, a layer composed of a reinforcement cloth 4 connected to one side of the layer composed of the nonwoven abrasive cloth, a central opening part 5, a nearly flat surface, and a nearly flat rear face; and a resin-made grinder mounting part 2 that is formed integrally with the laminated body by insert-molding a resin at a surrounding part of the central opening part 5 of the disc-like laminated body 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は研磨ディスクに関し、特に、ディスクグラインダ装置の出力（回転）軸に取付けて使用される研磨ディスクに関する。   The present invention relates to a polishing disk, and more particularly to a polishing disk used by being attached to an output (rotation) shaft of a disk grinder apparatus.

特許文献１には樹脂製グラインダ取付け部と不織布研磨材とが一体的に形成された研磨ディスクが記載されている。図１にはこの研磨ディスク１０の部分断面側面が示されている。図１の研磨ディスクは中央開口部を有する傘状の不織布研磨材１１と、樹脂製グラインダ取付け部１２を有している。樹脂製グラインダ取付け部１２は外周部分において、不織布研磨材１１の内周部分と結合されている。   Patent Document 1 describes a polishing disk in which a resin grinder mounting portion and a nonwoven fabric abrasive are integrally formed. FIG. 1 shows a partial sectional side view of the polishing disk 10. The polishing disk of FIG. 1 has an umbrella-shaped nonwoven fabric abrasive 11 having a central opening and a resin grinder mounting portion 12. The resin grinder mounting portion 12 is coupled to the inner peripheral portion of the nonwoven fabric abrasive 11 at the outer peripheral portion.

樹脂製グラインダ取付け部１２はグラインダ取付け穴１３を有し、グラインダ取付け穴の内周壁にはナットとして機能するようにネジ山が形成されている。ディスクグラインダ装置Ｇの出力軸１４が、ワッシャ１５などにより、このグラインダ取付け穴１３にねじ込まれて、研磨ディスク１０がディスクグラインダ装置Ｇに固定される。   The resin grinder mounting portion 12 has a grinder mounting hole 13, and a thread is formed on the inner peripheral wall of the grinder mounting hole so as to function as a nut. The output shaft 14 of the disc grinder apparatus G is screwed into the grinder mounting hole 13 by a washer 15 or the like, and the polishing disk 10 is fixed to the disc grinder apparatus G.

この研磨ディスクは研磨時にバックアップパッドを使用する必要がない。そのため、軽量コンパクトで駆動エネルギ効率や作業性等に優れている。   This polishing disk does not require the use of a backup pad during polishing. Therefore, it is lightweight and compact and has excellent driving energy efficiency and workability.

しかしながら、この研磨ディスクでは、不織布研磨材１１は傘状に成形され、また樹脂製グラインダ取付け部１２は取付け方向に突出しており、バックアップパッドを使用する場合と比較して、厚さ方向の寸法はそれほど低減されていない。そのため、研磨作業時には、幅広の作業空間を必要とし、狭い部分や溝の側面を研磨することが困難である。   However, in this polishing disk, the nonwoven fabric abrasive 11 is formed in an umbrella shape, and the resin grinder mounting portion 12 protrudes in the mounting direction, and the dimension in the thickness direction is smaller than that in the case of using a backup pad. It has not been reduced so much. Therefore, a wide working space is required at the time of polishing work, and it is difficult to polish a narrow portion or a side surface of a groove.

また樹脂製グラインダ取付け部１２は半径が大きく、不織布研磨材１１をかみ込んだ結合部分は、不織布研磨材１１の直径の約１／２を占めている。結合部分の幅が大きいと研磨作業に利用できる不織布研磨材の量は少なくなるため、研磨ディスクの使用寿命が短くなる。   Further, the resin grinder mounting portion 12 has a large radius, and the joint portion that encases the nonwoven fabric abrasive 11 occupies about ½ of the diameter of the nonwoven fabric abrasive 11. If the width of the bonded portion is large, the amount of non-woven fabric abrasive that can be used for the polishing operation is reduced, so that the service life of the polishing disk is shortened.

厚さ方向の寸法を小さくするために不織布研磨材１１の形状をただ平坦にすると、研磨ディスクの強度が不足して、研磨応力により破損するおそれがある。また、樹脂製グラインダ取付け部１２の半径を小さくすると、不織布研磨材１１との結合部分の幅が狭くなるため、研磨応力により結合部分が分離してしまうおそれがある。   If the shape of the non-woven fabric abrasive 11 is simply made flat in order to reduce the dimension in the thickness direction, the strength of the polishing disk is insufficient and there is a risk of damage due to polishing stress. Moreover, since the width | variety of the coupling | bond part with the nonwoven fabric abrasive | polishing material 11 will become narrow if the radius of the resin grinder attachment part 12 is made small, there exists a possibility that a coupling | bond part may isolate | separate with grinding | polishing stress.

他方、特許文献２及び３には、不織布と補強布とを樹脂で結合する方法が記載されている。この方法で得られた積層体は動的な負荷に対する強度が優れ、表面仕上げ用製品として用いられる。
特開平１１−３２０４２３号公報 特表平１０−５１１７４９号公報 特開平５−２２９０７１号公報 On the other hand, Patent Documents 2 and 3 describe a method of bonding a nonwoven fabric and a reinforcing fabric with a resin. The laminate obtained by this method has excellent strength against dynamic load and is used as a product for surface finishing.
JP-A-11-320423 Japanese National Patent Publication No. 10-511749 JP-A-5-229071

本発明は上記従来の問題を解決するものであり、その目的とするところは、厚さ方向の寸法が小さく、狭い部分や溝の側面をも容易に研磨することができ、しかも研磨時にかかる力に対抗するのに十分な強度を有する研磨ディスクを提供することにある。   The present invention solves the above-mentioned conventional problems, and its object is to have a small dimension in the thickness direction and to easily polish a narrow portion or a side surface of a groove, and to apply force during polishing. It is an object of the present invention to provide an abrasive disc having sufficient strength to counteract the above.

本発明は、不織布研磨材からなる層と、該層の片側に結合された補強布からなる層と、中央開口部と、ほぼ平坦な表面及びほぼ平坦な裏面とを有する、ディスク状積層体、及び
該ディスク状積層体の中央開口部の周囲部に、樹脂をインサート成形することによりディスク状積層体と一体的に形成された、樹脂製グラインダ取付け部、
を有する研磨ディスクを提供するものであり、そのことにより上記目的が達成される。 The present invention is a disc-shaped laminate having a layer made of a nonwoven fabric abrasive, a layer made of a reinforcing cloth bonded to one side of the layer, a central opening, a substantially flat surface and a substantially flat back surface, And a resin grinder mounting portion formed integrally with the disk-shaped laminate by insert molding resin around the central opening of the disk-shaped laminate,
The above object is achieved thereby.

本発明の研磨ディスクは厚さ方向の寸法が小さく、狭い部分や溝の側面をも容易に研磨することができ、しかも研磨時にかかる力に対抗するのに十分な強度を有している。   The polishing disk of the present invention has a small size in the thickness direction, can easily polish a narrow portion or a side surface of a groove, and has sufficient strength to resist the force applied during polishing.

研磨ディスク
図２は本発明の研磨ディスクの構成の一例を示している。図２（ａ）は断面図であり、図２（ｂ）は正面図である。 2. Polishing disk FIG. 2 shows an example of the structure of the polishing disk of the present invention. 2A is a sectional view, and FIG. 2B is a front view.

この研磨ディスクはディスク状積層体１及び樹脂製グラインダ取付け部２を有している。ディスク状積層体１は不織布研磨材３と補強布４とを積層し、結合したものである。ディスク状積層体１の表面及び裏面はほぼ平坦であり、中央開口部５を有している。樹脂製グラインダ取付部２はこの中央開口部の周囲部に一体的に形成されている。樹脂製グラインダ取付部２はグラインダ取付け穴６を有し、グラインダ取付け穴６の内周壁にはナットとして機能するようにネジ山が形成されている。   This polishing disk has a disk-shaped laminate 1 and a resin grinder mounting portion 2. The disk-shaped laminate 1 is obtained by laminating and bonding a nonwoven fabric abrasive 3 and a reinforcing cloth 4. The front and back surfaces of the disk-shaped laminate 1 are substantially flat and have a central opening 5. The resin grinder mounting portion 2 is integrally formed around the central opening. The resin grinder mounting portion 2 has a grinder mounting hole 6, and a thread is formed on the inner peripheral wall of the grinder mounting hole 6 so as to function as a nut.

本発明の研磨ディスクは、不織布研磨材３に補強布４が結合されたディスク状積層体１を有している。補強布４は、織られた耐伸長性布であり、引っ張った場合の伸長度が低い。そのため、ディスク状積層体１は不織布研磨材３よりも引っ張り強度および剛性が増大している。そのため、本発明の研磨ディスクは傘状に成形しなくても研磨応力に耐えることができる。   The abrasive disc of the present invention has a disc-shaped laminate 1 in which a reinforcing cloth 4 is bonded to a nonwoven fabric abrasive 3. The reinforcing cloth 4 is a woven stretch-resistant cloth and has a low degree of elongation when pulled. Therefore, the tensile strength and rigidity of the disk-shaped laminate 1 are increased as compared with the nonwoven fabric abrasive 3. Therefore, the polishing disk of the present invention can withstand polishing stress without being formed into an umbrella shape.

更に、補強布４はディスク状積層体の中央開口部５の強度も向上させ、樹脂製グラインダ取付け部との結合力が増大する。そのため、本発明の研磨ディスクでは、樹脂製グラインダ取付け部２の半径を小さくしても研磨中に結合部分が分離することがない。   Furthermore, the reinforcing cloth 4 also improves the strength of the central opening 5 of the disk-shaped laminate, and increases the bonding force with the resin grinder mounting portion. For this reason, in the polishing disk of the present invention, even if the radius of the resin grinder mounting portion 2 is reduced, the bonded portion is not separated during polishing.

例えば、研磨ディスクの外径が約７５〜約１２５ｍｍである場合、樹脂製グラインダ取付け部２の外径はグラインダのワッシャの外径とほぼ同一の寸法とすることができる。つまり、一般には直径が約２０〜約４０ｍｍ、例えば約３０ｍｍである。   For example, when the outer diameter of the polishing disk is about 75 to about 125 mm, the outer diameter of the resin grinder mounting portion 2 can be made substantially the same as the outer diameter of the washer of the grinder. That is, the diameter is generally about 20 to about 40 mm, for example about 30 mm.

更に、本発明の研磨ディスクは表面及び裏面はほぼ平坦である。そのため、２枚を背中合わせに重ねて結合することもできる。２枚の研磨ディスクの結合は、適当な結合剤を用いて研磨ディスクの補強布４側の露出面同士を接着して行えばよい。図３はこのような研磨ディスクの構成例を示す断面図である。この研磨ディスクは、表面及び裏面共に研磨面を有するものであり、溝の両側面のような、相対する側面を一度の作業で研磨することができる。   Further, the front and back surfaces of the abrasive disc of the present invention are substantially flat. Therefore, two sheets can be overlapped and joined back to back. The two abrasive discs may be joined by bonding the exposed surfaces of the abrasive discs on the reinforcing cloth 4 side using an appropriate binder. FIG. 3 is a cross-sectional view showing a configuration example of such a polishing disk. This polishing disk has a polishing surface on both the front surface and the back surface, and the opposite side surfaces such as both side surfaces of the groove can be polished in one operation.

不織布研磨材
不織布研磨材は、不織布を基材として用いて、不織布を構成する繊維の表面に、結合剤で研磨粒子を固定した研磨材をいう。不織布研磨材は、金属、木材、プラスチックからなる物品表面の腐蝕、欠陥、バリなどを除去したり、表面を所望の状態に仕上げるために使用される。 Nonwoven Abrasive Material A nonwoven fabric abrasive material refers to an abrasive material in which abrasive particles are fixed with a binder on the surface of fibers constituting the nonwoven fabric, using the nonwoven fabric as a base material. Nonwoven abrasives are used to remove corrosion, defects, burrs, and the like on the surface of articles made of metal, wood, and plastic, and to finish the surface to a desired state.

不織布は、ナイロン、ポリエステルなど、適切な合成繊維を含む嵩高性ウェブである。この不織布は、含浸用樹脂及び接着結合剤が劣化せずに硬化する温度に耐えられることが望ましい。不織布の繊維は、張力及び捲縮性があることが望ましいが、例えば米国特許第４，２２７，３５０号に開示されているようなスパンボンド過程により成形された連続フィラメントでも良い。不織布に満足に使用できる繊維は、約２０ミリメートルから約１００ミリメートルの長さであり、約４０ミリメートルから約６５ミリメートルの長さであれば望ましく、約１．５デニールから約５００デニールの太さであり、約１５デニールから約１００デニールの太さであれば望ましい。   Nonwoven fabrics are bulky webs containing suitable synthetic fibers, such as nylon and polyester. The nonwoven fabric should be able to withstand the temperature at which the impregnating resin and adhesive binder are cured without deterioration. The nonwoven fibers are preferably tensioned and crimped, but may be continuous filaments formed by a spunbond process as disclosed, for example, in US Pat. No. 4,227,350. Fibers that can be satisfactorily used in nonwovens are about 20 millimeters to about 100 millimeters long, desirably about 40 millimeters to about 65 millimeters long, and about 1.5 to about 500 denier thick. Yes, a thickness of about 15 denier to about 100 denier is desirable.

不織布は、ニューヨークのランド機械社（Rando Machine Company）が市販している「Ｒａｎｄｏ Ｗｅｂｂｅｒ」機械で容易に成形されるか、又は従来のその他のカーディング過程により成形することができる。スパンボンドタイプの不織材料を使用する場合、フィラメントは実質的に直径が比較的大きく、例えば直径２ミリメートル以上である。直径が比較的大きい繊維を使用すると、比較的大きい研磨粒子を完成品に使用することができる。有用な不織布は、単位面積当りの重量が少なくとも約１００g/m2であることが望ましく、約２５０g/m2であれば更に望ましい。不織布内の繊維の量が比較的少ない場合、製品の使用寿命は多少短くなる。前記の繊維の重量では、一般に、針で縫われるか又は含浸する前で約６ミリメートルから約７５ミリメートルの厚さを有する不織布になる。この厚さは、約２５ミリメートルであることが望ましい。本発明に使用するのに適する市販の不織布としては、以下の例に記載するものがある。 Nonwoven fabrics can be easily formed on “Rando Webber” machines sold by Rando Machine Company, New York, or by other conventional carding processes. When using a spunbond type nonwoven material, the filaments are substantially relatively large in diameter, for example 2 millimeters or more in diameter. When fibers having a relatively large diameter are used, relatively large abrasive particles can be used in the finished product. Useful nonwovens desirably have a weight per unit area of at least about 100 g / m 2 and more preferably about 250 g / m 2 . When the amount of fibers in the nonwoven fabric is relatively small, the service life of the product is somewhat shortened. The weight of the fibers generally results in a nonwoven having a thickness of about 6 millimeters to about 75 millimeters before being sewn or impregnated with a needle. This thickness is preferably about 25 millimeters. Commercially available nonwovens suitable for use in the present invention include those described in the following examples.

不織布は、有刺針を不織布に通すことにより不織布を機械的に補強する処理であるニードルタッキングによって任意に更に補強及び圧密しても良い。この処理の際、針は、不織布の繊維を針と一緒に引っ張り、不織布を通る。したがって、針を引くと、不織布の繊維の個々の集合は不織繊維の厚さ方向に向く。ニードルタッキングの量つまり程度は、ウィスコンシン州、マニトウォックのフォスターニードル社（Foster Needle Company）が市販している１５×１８×２５×３．５ＲＢ、Ｆ２０６−３２−５．５Ｂ／３Ｂ／２Ｅ／Ｌ９０針を使用する場合、不織布表面の１平方センチメートル当りに針を約８回から約２０回通すと良い。ニードルタッキングは、例えばノースキャロライナ州のディロ社（Dilo, Inc.）が市販している従来の針織機を使用して容易に達成することができる。   The nonwoven fabric may optionally be further reinforced and consolidated by needle tacking, which is a process of mechanically reinforcing the nonwoven fabric by passing a barbed needle through the nonwoven fabric. During this treatment, the needle pulls the nonwoven fibers together with the needle and passes through the nonwoven. Therefore, when the needle is pulled, individual collections of nonwoven fibers are oriented in the thickness direction of the nonwoven fibers. The amount or degree of needle tacking is 15 × 18 × 25 × 3.5 RB, F206-32-5.5B / 3B / 2E / L90 needles commercially available from Foster Needle Company, Manitowoc, Wisconsin. Is used, the needle may be passed from about 8 to about 20 times per square centimeter of the nonwoven surface. Needle tacking can be readily accomplished using, for example, a conventional needle loom commercially available from Dilo, Inc. of North Carolina.

任意のニードルタッキングステップの後、不織布には、完成品の所望の強度に応じて、樹脂研磨スラリ又は樹脂結合剤（研磨粒子を含まないものなど）を含浸させる。不織布には、スプレー塗布、浸漬塗布又は２ロールコータを使用するロール塗布など、多くの従来の応用技術を使用して、樹脂研磨スラリ又は樹脂結合剤を飽和させる。不織布のコーティングに使用する望ましい樹脂は、硬化後に比較的硬質になり、成分である繊維を互いに確実に結合するものである。本発明に有用な樹脂の具体例としては、フェノール樹脂、ペンダントα、β−不飽和カルボニル基を有するアミノプラスト樹脂、ウレタン樹脂、エポキシ樹脂、エチレン性不飽和樹脂、アクリル化イソシアヌレート樹脂、ウレアホルムアルデヒド樹脂、イソシアヌレート樹脂、アクリル化ウレタン樹脂、アクリル化エポキシ樹脂、ビスマレイミド樹脂、弗素変性エポキシ樹脂及びこれらの組合せがある。触媒及び／又は硬化剤を結合剤先駆物資に添加して重合を誘導及び／又は排除しても良い。本発明に使用する結合剤は、引用により本明細書に包含するニューヨーク、１９８１年、John Wiley and Sons発行の「カークオスマー化学大辞典」第３版、第１７巻、３８４〜３９９頁に記載されているレゾール樹脂及びノボラック樹脂などのフェノール樹脂であることが望ましい。レゾールフェノール樹脂は、アルカリ触媒及び一般にホルムアルデヒド対フェノールのモル比が約１．０：１．０から３．０：１．０であるモル過剰量のホルムアルデヒドから作られる。ノボラック樹脂は、酸触媒に基づいてホルムアルデヒド対フェノールのモル比が１．０：１．０未満で作られる。本発明に使用するのに適する市販のフェノール樹脂としては、ニューヨーク州、Ｎトナワンダのオクシデンタル化学社（Occidental Chemicals Corporation）市販の「Ｄｕｒｅｚ」及び「Ｖａｒｃｕｍ」、モンサント社（Monsanto Corporation）市販の「Ｒｅｓｉｎｏｘ」並びにアシュランド化学社（Ashland Chemical Company）市販の「Ａｒｏｆｅｎｅ」及び「Ａｒｏｔａｐ」の商標で知られるものがある。   After the optional needle tacking step, the nonwoven is impregnated with a resin polishing slurry or resin binder (such as one that does not contain abrasive particles) depending on the desired strength of the finished product. The nonwoven fabric is saturated with a resin polishing slurry or resin binder using many conventional applications such as spray coating, dip coating or roll coating using a two roll coater. Desirable resins for use in non-woven coatings are those that are relatively hard after curing to ensure that the constituent fibers are bonded together. Specific examples of resins useful in the present invention include phenolic resins, aminoplast resins having pendant α, β-unsaturated carbonyl groups, urethane resins, epoxy resins, ethylenically unsaturated resins, acrylated isocyanurate resins, urea formaldehyde. Resins, isocyanurate resins, acrylated urethane resins, acrylated epoxy resins, bismaleimide resins, fluorine-modified epoxy resins, and combinations thereof. Catalysts and / or curing agents may be added to the binder precursor to induce and / or eliminate polymerization. The binders used in the present invention are described in New York, 1981, “The Kirkusmer Dictionary of Chemistry”, 3rd edition, Volume 17, pages 384-399, published by John Wiley and Sons, which is incorporated herein by reference. Preferably, the resin is a phenolic resin such as a resole resin or a novolac resin. The resole phenolic resin is made from an alkaline catalyst and a molar excess of formaldehyde, generally having a molar ratio of formaldehyde to phenol of about 1.0: 1.0 to 3.0: 1.0. Novolak resins are made with a molar ratio of formaldehyde to phenol of less than 1.0: 1.0 based on an acid catalyst. Commercially available phenolic resins suitable for use in the present invention include "Durez" and "Varcum", commercially available from Occidental Chemicals Corporation, N Tonawanda, New York, and "Resinox", commercially available from Monsanto Corporation. And those known under the trade names “Arofine” and “Arotap” available from the Ashland Chemical Company.

不織布の表面及び／又は裏面は各々、任意の研磨粒子を含むことができる上記の樹脂結合剤を塗布される。研磨粒子は、不織布に樹脂結合剤を塗布した後の別個のステップで付与しても良い。ここで使用するのに適する研磨粒子は、仕上げ作業に一般に使用される研磨粒子のように２４グレード又はこれより細かいことが望ましい。適切な研磨粒子としては、酸化セラミックアルミニウムを含む酸化アルミニウム、熱処理した酸化アルミニウム、白色融解した酸化アルミニウム、炭化珪素、アルミナジルコニア、ダイヤモンド、セリア、立方晶窒化硼素、ガーネット、フリント、エメリー粉及びこれらの組合せがある。また、開示内容を引用により本明細書に包含する米国特許第４，６５２，２７５号及び第４，７９９，９３９号に記載されているような研磨凝集物を使用しても良い。   The front and / or back surfaces of the nonwoven fabric are each coated with the above resin binder that can contain any abrasive particles. The abrasive particles may be applied in a separate step after applying the resin binder to the nonwoven fabric. Abrasive particles suitable for use herein are desirably 24 grades or finer, such as abrasive particles commonly used in finishing operations. Suitable abrasive particles include aluminum oxide including ceramic oxide aluminum, heat treated aluminum oxide, white melted aluminum oxide, silicon carbide, alumina zirconia, diamond, ceria, cubic boron nitride, garnet, flint, emery powder and these There are combinations. Also, abrasive agglomerates such as those described in US Pat. Nos. 4,652,275 and 4,799,939, the disclosures of which are incorporated herein by reference, may be used.

補強布
補強布は、引っ張った場合の伸長度が低い織られた耐伸長性布である。伸長度は約２０％未満であることが望ましく、約１５％未満であれば更に望ましい。本発明の製品の補強布として使用するのに適する材料としては、熱接着布、メリヤス生地、ステッチ接着布などがあるが、これらだけに限らない。 Reinforcing cloth Reinforcing cloth is a woven stretch-resistant cloth that has a low degree of elongation when pulled. The degree of elongation is desirably less than about 20%, and more desirably less than about 15%. Suitable materials for use as a reinforcing fabric for the product of the present invention include, but are not limited to, thermal bonded fabrics, knitted fabrics, stitch bonded fabrics and the like.

本発明の一つの側面は、開口部を有する織物から成る補強布の使用である。ナイロン６を使用する場合、補強布は、縦糸と横糸の間の開口部が０．１０mm2である平織物から成ることが望ましい。８４０デニールの６，６ナイロン糸が１インチ当り縦糸１６本、横糸１６本（例えば１６×１６）で、布重量が１４９g/m2（４．４ oz./g2）である平織物は、ナイロン６ポリマーと共に使用するのに最も望ましい。こうした材料は、ノースキャロライナ州、グリーンズボロのハイランド社（Highland Industries）から市販されている。 One aspect of the present invention is the use of a reinforcing fabric made of a woven fabric having openings. When nylon 6 is used, the reinforcing fabric is preferably made of a plain fabric with an opening between the warp and weft of 0.10 mm 2 . A plain fabric with 840 denier 6,6 nylon yarns of 16 warp yarns per inch, 16 weft yarns (for example 16 × 16), and a fabric weight of 149 g / m 2 (4.4 oz./g 2 ) Most desirable for use with nylon 6 polymers. Such materials are commercially available from Highland Industries, Greensboro, North Carolina.

ポリエステル、綿、動物の毛、その他のポリアミドなどから作られた材料など、その他の材料を使用しても良い。織られた耐伸長性補強布の少なくとも一つの層が、ディスク状積層体に含まれることが望ましい。布のその他の層（図示しない）を使用して、寸法上の強度を高めても良い。   Other materials such as polyester, cotton, animal hair, other materials made from polyamide, etc. may be used. Desirably, at least one layer of woven stretch resistant reinforcing fabric is included in the disk-shaped laminate. Other layers of fabric (not shown) may be used to increase dimensional strength.

ディスク状積層体
不織布研磨材及び補強布を円形に裁断し、中央開口部を設け、両者を積層して結合することにより、ディスク状積層体が得られる。不織布研磨材及び補強布を積層及び結合した後に円形に裁断し、中央開口部を設けてもよい。不織布研磨材と補強布とを結合する方法は特に限定されない。例えば、適当な接着剤を用いて貼り合わせればよい。特許文献２又は３に記載されている方法で両者を結合してもよい。 A disc-shaped laminate is obtained by cutting the disc-shaped laminate nonwoven fabric abrasive and the reinforcing fabric into a circle, providing a central opening, and laminating and bonding the two. After laminating and bonding the nonwoven fabric abrasive material and the reinforcing cloth, it may be cut into a circular shape to provide a central opening. A method for bonding the nonwoven fabric abrasive and the reinforcing cloth is not particularly limited. For example, the bonding may be performed using an appropriate adhesive. You may couple | bond both by the method described in patent document 2 or 3.

不織布研磨材と補強布とを結合する特に好ましい方法は特許文献２に記載されているものである。この方法は、不織布研磨材の上に補強布を積層し、補強布の露出した表面から樹脂液を塗布し、樹脂液を補強布及び不織布研磨材に浸透させ、その後樹脂液を固化することによって、補強布と不織布研磨材とを結合するものである。   A particularly preferable method for bonding the nonwoven fabric abrasive and the reinforcing fabric is described in Patent Document 2. In this method, a reinforcing cloth is laminated on a nonwoven fabric abrasive material, a resin liquid is applied from the exposed surface of the reinforcing cloth, the resin liquid is permeated into the reinforcing cloth and the nonwoven fabric abrasive material, and then the resin liquid is solidified. The reinforcing cloth and the nonwoven fabric abrasive are combined.

図４は特許文献２に記載の方法により結合された不織布研磨材と補強布との積層体の構成を示す断面図である。この積層体では不織布研磨材３と補強布４とが積層されており、補強布４の露出した表面の上に樹脂層７を有している。樹脂層７は可撓性の低摩擦面７ａと、補強布４に存在する開口部（隙間）を通過して、不織布研磨材３と補強布４の境界面に沿って延び、不織布研磨材３の構成繊維を包み込む部分７ｂを有している。   FIG. 4 is a cross-sectional view showing a configuration of a laminate of a nonwoven fabric abrasive and a reinforcing fabric bonded by the method described in Patent Document 2. In this laminate, the nonwoven fabric abrasive 3 and the reinforcing cloth 4 are laminated, and the resin layer 7 is provided on the exposed surface of the reinforcing cloth 4. The resin layer 7 passes through the flexible low friction surface 7 a and the opening (gap) present in the reinforcing cloth 4, and extends along the boundary surface between the nonwoven fabric abrasive 3 and the reinforcing cloth 4. The part 7b which wraps up the constituent fiber is provided.

樹脂は、硬化可能塗布可能な配合物として粘性流体の形態で、一般に溶解した状態で塗布することが望ましい。塗布可能な配合物は、圧力が加わると、補強布４内の開口部から不織布研磨材３内に押し出される。こうして、溶解した樹脂は不織布研磨材３の主要面に沿って周囲に流れ、繊維を包み込む。樹脂は次に公知の方法で硬化され、強化用の厚い連続樹脂層７を形成し、製品の外面を形成する。樹脂は、不織布研磨材３の残りの部分に著しく浸透しないように塗布及び硬化されることが望ましい。   The resin is preferably applied in the form of a viscous fluid, generally in a dissolved state, as a curable and applyable formulation. When a pressure is applied, the composition that can be applied is pushed into the nonwoven fabric abrasive 3 from the opening in the reinforcing cloth 4. Thus, the melted resin flows to the periphery along the main surface of the nonwoven fabric abrasive 3 and wraps the fibers. The resin is then cured in a known manner to form a thick continuous resin layer 7 for reinforcement, forming the outer surface of the product. It is desirable that the resin is applied and cured so as not to significantly penetrate the remaining portion of the nonwoven fabric abrasive 3.

樹脂層７は、一般に、約６０〜約９０、好ましくは約７０〜約８０のショアーＤ硬度を有する。樹脂層７の硬度がショアーＤ約６０未満であると作業負荷を加えた際に研磨ディスクのたわみが大きくなり、研磨効率が乏しくなる。また、樹脂層７の硬度がショアーＤ約９０を越えると研磨ディスクの脆性が大きくなり、研磨作業中に破損しやすくなる。   The resin layer 7 generally has a Shore D hardness of about 60 to about 90, preferably about 70 to about 80. When the hardness of the resin layer 7 is less than about Shore D, when the work load is applied, the deflection of the polishing disk increases and the polishing efficiency becomes poor. On the other hand, if the hardness of the resin layer 7 exceeds about Shore D, the brittleness of the polishing disk increases, and it tends to break during the polishing operation.

樹脂層７の構成樹脂は溶融押出樹脂であることが望ましく、相溶性充填剤、顔料、強化繊維、酸化防止剤などを含んで良い。好適な溶融押出樹脂としては、ナイロン、ポリエステル、ポリプロピレン、エチレン／酢酸ビニル共重合体、アクリル酸／ブタジエン／スチレン共重合体などの熱可塑性樹脂がある。イオノマ、ポリエステル、ポリウレタン、ポリアミドエーテルなどの熱可塑性エラストマも、適切な溶融押出樹脂である。樹脂層は、上記の塗布可能な配合物中における液体反応体の重合から形成することができ、有用な反応樹脂組織は熱又は放射硬化ウレタン、ポリエステル及びエポキシ樹脂を含む。   The constituent resin of the resin layer 7 is desirably a melt-extruded resin, and may contain a compatible filler, pigment, reinforcing fiber, antioxidant, and the like. Suitable melt extruded resins include thermoplastic resins such as nylon, polyester, polypropylene, ethylene / vinyl acetate copolymer, acrylic acid / butadiene / styrene copolymer. Thermoplastic elastomers such as ionomers, polyesters, polyurethanes, polyamide ethers are also suitable melt extrusion resins. The resin layer can be formed from the polymerization of liquid reactants in the coatable formulation described above, and useful reactive resin textures include heat or radiation curable urethanes, polyesters and epoxy resins.

樹脂製グラインダ取付け部
樹脂製グラインダ取付け部は、ディスク状積層体の中央開口部の周囲部に、樹脂をインサート成形することにより積層体と一体的に形成することが好ましい。インサート成形とは、金型内にインサート品（この場合はディスク状積層体）を装填した後、溶融樹脂を注入してインサート品を樹脂で包んで固化させ、一体化した複合材料を作る方法をいう。 Resin grinder attachment part The resin grinder attachment part is preferably formed integrally with the laminate by insert molding resin around the central opening of the disc-like laminate. Insert molding is a method in which an insert product (in this case, a disk-shaped laminate) is loaded into a mold, and then molten resin is injected and the insert product is wrapped and solidified to form an integrated composite material. Say.

ディスク状積層体は嵩高性であり、構成繊維の間に隙間が存在する。そのため、樹脂製グラインダ取付け部の外周部分において、インサート成形時にディスク状積層体の構成繊維の隙間に樹脂製グラインダ取付け部の樹脂が浸透して、固化することによって両者が結合される。その具体的な操作は、特許文献１に記載の方法と実質的に同一である。但し、使用する金型は、樹脂製グラインダ取付け部が取付け方向に突出せず、ディスク状積層体の表面及び裏面に沿ってほぼ平坦になるように、形状を変更する。   The disk-shaped laminate is bulky and there are gaps between the constituent fibers. Therefore, in the outer peripheral portion of the resin grinder mounting portion, the resin of the resin grinder mounting portion penetrates into the gaps between the constituent fibers of the disk-shaped laminate during insert molding, and the two are combined by solidifying. The specific operation is substantially the same as the method described in Patent Document 1. However, the shape of the mold to be used is changed so that the resin grinder mounting portion does not protrude in the mounting direction and is substantially flat along the front and back surfaces of the disk-shaped laminate.

樹脂製グラインダ取付け部は硬質の熱可塑性樹脂から形成することが好ましい。例えば、ＡＢＳ、ナイロン、ポリエステル樹脂等が挙げられる。特に好ましい熱可塑性樹脂はナイロン６，６である。ネジ山が形成された内周側面等を強化するために、樹脂にガラス繊維を混ぜてもよい。ガラス繊維の含有量は約１０〜約６０重量％、好ましくは約４５重量％である。   The resin grinder mounting portion is preferably formed from a hard thermoplastic resin. For example, ABS, nylon, polyester resin, etc. are mentioned. A particularly preferred thermoplastic resin is nylon 6,6. In order to reinforce the inner peripheral side surface on which the screw thread is formed, glass fiber may be mixed with the resin. The glass fiber content is about 10 to about 60% by weight, preferably about 45% by weight.

形成された樹脂製グラインダ取付け部は、乾燥及び常温下での物性として、引っ張り強さ約１５０〜約２５０ＭＰａ、例えば、約２２０ＭＰａ、曲げ強さ約２２０〜約３４０ＭＰａ、例えば、約３００ＭＰａを有している。樹脂製グラインダ取付け部の厚さはディスク状積層体と同程度に調節する。一般には約２〜約１５ｍｍ、例えば、約５ｍｍである。   The formed resin grinder mounting part has a tensile strength of about 150 to about 250 MPa, for example, about 220 MPa, a bending strength of about 220 to about 340 MPa, for example, about 300 MPa, as physical properties at dry and normal temperatures. Yes. The thickness of the resin grinder mounting part is adjusted to the same level as the disk-shaped laminate. Generally from about 2 to about 15 mm, for example about 5 mm.

従来の研磨ディスクの部分断面側面を示す図である。It is a figure which shows the partial cross section side surface of the conventional grinding | polishing disc. 本発明の研磨ディスクの構成の一例を示す断面図及び正面図である。It is sectional drawing and a front view which show an example of a structure of the grinding | polishing disc of this invention. 本発明の研磨ディスクの構成の一例を示す断面図である。It is sectional drawing which shows an example of a structure of the grinding | polishing disc of this invention. 本発明で用いる不織布研磨材と補強布との積層体の構成例を示す断面図である。It is sectional drawing which shows the structural example of the laminated body of the nonwoven fabric abrasive | polishing material and reinforcement cloth which are used by this invention.

符号の説明Explanation of symbols

１…ディスク状積層体、
２…樹脂製グラインダ取付け部、
３…不織布研磨材、
４…補強布、
５…中央開口部、
６…グラインダ取付け穴。


1 ... disk-shaped laminate,
2 ... Resin grinder mounting part,
3 ... Nonwoven fabric abrasive,
4 ... Reinforcing cloth,
5 ... Central opening,
6 ... Grinder mounting hole.


Claims (5)

不織布研磨材３からなる層と、該層の片側に結合された補強布４からなる層と、中央開口部５と、ほぼ平坦な表面及びほぼ平坦な裏面とを有する、ディスク状積層体１、及び
該ディスク状積層体１の中央開口部の周囲部に、樹脂をインサート成形することによりディスク状積層体１と一体的に形成された、樹脂製グラインダ取付け部２、
を有する研磨ディスク。 A disc-shaped laminate 1 having a layer made of a non-woven abrasive 3, a layer made of a reinforcing cloth 4 bonded to one side of the layer, a central opening 5, a substantially flat surface and a substantially flat back surface; And a resin grinder mounting portion 2 formed integrally with the disk-shaped laminate 1 by insert molding resin around the central opening of the disk-shaped laminate 1.
A polishing disc having: 互いに背中合わせに重ねて結合された、２枚の請求項１記載の研磨ディスク、を有する研磨ディスク。   An abrasive disc having two abrasive discs according to claim 1, which are joined back to back. 前記樹脂製グラインダ取付け部２の外周部分において、インサート成形時にディスク状積層体の構成繊維の隙間に樹脂製グラインダ取付け部の樹脂が浸透して、固化することによって両者が結合されている、請求項１又は２記載の研磨ディスク。   In the outer peripheral part of the resin grinder mounting part 2, the resin of the resin grinder mounting part penetrates into the gaps of the constituent fibers of the disk-shaped laminate during insert molding, and the two are combined by solidifying. The polishing disk according to 1 or 2. 前記樹脂製グラインダ取付け部２がグラインダ取付け穴６を有し、グラインダ取付け穴の内周壁にはナットとして機能するようにネジ山が形成されている、請求項１〜３のいずれか記載の研磨ディスク。   The abrasive disc according to any one of claims 1 to 3, wherein the resin grinder mounting portion 2 has a grinder mounting hole 6 and a thread is formed on the inner peripheral wall of the grinder mounting hole so as to function as a nut. . 前記ディスク状積層体１は、補強布４の露出した表面から樹脂液を塗布し、樹脂液を補強布４及び不織布研磨材３に浸透させ、その後樹脂液を固化することによって、補強布４と不織布研磨材３とが結合されたものである、請求項１〜４のいずれか記載の研磨ディスク。
The disk-shaped laminate 1 is formed by applying a resin liquid from the exposed surface of the reinforcing cloth 4, allowing the resin liquid to permeate the reinforcing cloth 4 and the nonwoven fabric abrasive 3, and then solidifying the resin liquid. The abrasive disc according to any one of claims 1 to 4, wherein the nonwoven fabric abrasive 3 is bonded thereto.
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Also Published As

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WO2007147039A1 (en) 2007-12-21
US20100190420A1 (en) 2010-07-29
EP2035188A1 (en) 2009-03-18
EP2035188A4 (en) 2011-01-05

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