201121714 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種研磨砂輪之製造方法及由此方法所製 造之研磨砂輪，更特別的是，本發明係利用射出成型來製 造研磨砂輪。 【先前技術】 研磨砂輪係裝置於拋光/研磨工具上之耗材，藉由抛光/ 研磨工具之高速旋轉，使砂輪周邊與卫件之表面接觸摩 擦’而達成使工件表面光滑之目的。 習知研磨砂輪係包含一蓋及_研磨部，該蓋通常為一圓 碟形塑膠件，研磨部則為將如紙、布或纖維膠合之圓盤， 其中間” #穿孔。該蓋之_端即套人該研磨部中心孔 内，並藉由黏勝將兩者結合在一起。 但是此種以膠合黏結方式製成之研磨砂輪，在使用於以 高速旋轉（如1〇，_rpm)之拋光/研磨工具時，很容易破 裂。此外，此種膠合黏結的方式需要準備許多輔助工呈， 專待黏膠凝固的時間較長。再者，由於黏膠的分布不均 勻，使得研磨砂輪之重量分布不均句，因而造成研磨 旋轉時的振動^ "" 因此，需要有—種研磨砂輪的製造方法，製造方法簡BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a grinding wheel and a grinding wheel manufactured by the method, and more particularly, the invention utilizes injection molding to manufacture a grinding wheel. [Prior Art] The consumables of the grinding wheel system on the polishing/grinding tool achieve the purpose of smoothing the surface of the workpiece by the high-speed rotation of the polishing/grinding tool to bring the periphery of the grinding wheel into contact with the surface of the guard. The conventional grinding wheel system comprises a cover and a grinding part, the cover is usually a round dish-shaped plastic part, and the grinding part is a disc which is glued like paper, cloth or fiber, and the middle part thereof is #孔孔. The end of the cover That is, the sleeve is placed in the center hole of the grinding portion, and the two are combined by the adhesive. However, the grinding wheel made by gluing and bonding is used for polishing at a high speed (for example, 1 〇, _rpm). / When grinding tools, it is easy to break. In addition, the way of bonding and bonding requires a lot of auxiliary workers to be prepared, and the adhesive is allowed to solidify for a long time. Moreover, due to the uneven distribution of the adhesive, the weight of the grinding wheel is made. Distribution of uneven sentences, thus causing vibration during grinding rotation ^ "" Therefore, there is a need to have a grinding wheel manufacturing method, manufacturing method
早、快速，所製造的研磨砂輪在高速旋轉時不易破裂，I 重置分布均句，而使研磨砂輪旋轉時的振動減少。 【發明内容】 本發明之一目的在於與供 k供一種製造研磨砂輪之方法，其 144588.doc 201121714 製造方法簡單、快 係利用射出成型來黏結蓋及研磨部 速。 本發明之再_目的在於提供—種研磨砂輪，其在高速旋 轉時不易破裂’且重量分布均勾’而使研磨砂輪旋轉時的 振動減少。 為達上述目的，本發明揭示一種製造研磨砂輪之方法 包含下列步驟：提供一蓋；提供一研磨部；將該蓋置放於 該研磨部上以形成一總成；固持該總成並將塑料注入該蓋 與該研磨部間之空間及該研磨部内，以將該蓋與該研磨 黏結。 本發明亦揭示有一種研磨砂輪，包含：—研磨部.一 蓋’設置於該研磨部上；其中’該蓋與該研磨部係藉由: 塑料注入該蓋與該研磨部間之空間及該研磨部内而黏钟 【實施方式】 ’# ° 如圖1及圖2所示，根據本發明製造研磨 較佳實施例，首先提供一 ^，蓋丄包含一大致體 10，蓋體10具有一穿孔u，蓋體10之底部向下延伸有一严 周壁13及一外周緣14。環周壁13包圍穿孔u，環周壁132 形成有-第一對徑向相對槽15、15及一第二對徑向相對： 17、17，其大致與第一對相對槽15、15呈正交設置。在 實施例中，第-對相對槽15、15之長度大於第 = 之長度。外周緣14具有-底㈣卜 ^對槽 如圖1所示，蓋1進一步包含兩導壁19、19，兩導壁19、 19係分別沿著第—對相對槽15、15之外側而自蓋體1〇之底 144588.doc 201121714 部延伸。各導壁19具有一底側19卜 1Q1 1Q1 s „ 呵導壁19、19之底側 191、191至少與外周緣14之底側丨 士廢# /，士 为十。如圖2所示’在 本實施例中，兩導壁19、19之底側丨 m A 191係延伸超過外 周緣14之底側141。 如圖2所示，在此實施例中，蓋1係由箭頭A處注入塑料 以射出成型方式一體製成，但蓋旧可由其 他材料製成。 ％ 4 呈碟形’並具有一 ’研磨部3 1係由不 ’如紙、布或纖維Early and fast, the manufactured grinding wheel is not easy to break at high speed rotation, I resets the distribution evenly, and reduces the vibration when the grinding wheel rotates. SUMMARY OF THE INVENTION One object of the present invention is to provide a method for manufacturing a grinding wheel, which is simple and quick to use an injection molding method to bond a cover and a grinding speed. A further object of the present invention is to provide a grinding wheel which is less prone to cracking at high speeds and has a weight distribution which reduces the vibration of the grinding wheel when it is rotated. To achieve the above object, the present invention discloses a method of manufacturing a grinding wheel comprising the steps of: providing a cover; providing a polishing portion; placing the cover on the polishing portion to form an assembly; holding the assembly and holding the plastic A space between the lid and the polishing portion and the inside of the polishing portion are injected to bond the lid to the polishing. The present invention also discloses a grinding wheel comprising: a polishing portion. A cover is disposed on the polishing portion; wherein the cover and the polishing portion are: a space between the cover and the polishing portion by plastic injection and [Embodiment] '#° As shown in FIG. 1 and FIG. 2, in the preferred embodiment of manufacturing the polishing according to the present invention, first, a cover is provided, and the cover 10 includes a substantially body 10, and the cover 10 has a perforation. u, a bottom wall 13 and an outer periphery 14 extend downward from the bottom of the cover 10. The circumferential wall 13 surrounds the perforations u, and the circumferential wall 132 is formed with a first pair of diametrically opposed slots 15, 15 and a second pair of diametrically opposed: 17, 17 which are substantially orthogonal to the first pair of opposing slots 15, 15 Settings. In an embodiment, the length of the first pair of opposing grooves 15, 15 is greater than the length of the =. The outer periphery 14 has a bottom (four) and a pair of grooves. As shown in FIG. 1, the cover 1 further includes two guide walls 19, 19 which are respectively along the outer sides of the first pair of opposite grooves 15, 15. The cover is extended to the bottom of the 144588.doc 201121714 section. Each of the guide walls 19 has a bottom side 19b 1Q1 1Q1 s „ The bottom sides 191, 191 of the guide walls 19, 19 are at least with the bottom side of the outer peripheral edge 14 of the 丨士废# /, 士为十. As shown in Figure 2 In the present embodiment, the bottom sides 丨m A 191 of the two guide walls 19, 19 extend beyond the bottom side 141 of the outer periphery 14. As shown in Fig. 2, in this embodiment, the cover 1 is injected by the arrow A. The plastic is integrally formed by injection molding, but the cover can be made of other materials. % 4 is in the shape of a dish and has a 'grinding part 3 1 is not like 'paper, cloth or fiber
其次，提供一研磨部3，研磨部3大致 中心孔3 1及一頂表面33。在此實施例中 織布製成，但是亦可由其他材料製成 等。 接著，將蓋i之環周壁13套入研磨部3之中心孔^中，此 時’蓋i底部之外周緣14底側⑷與研磨们之頂表面糾 觸’兩導壁19、19之底側191、191則至少與研磨部3之頂 表面33接觸。如圖3所示，在本實施例中，底側191、191 被直接壓入研磨部31内。藉此，蓋⑼研磨部3形成一總成 如圖4所示，將總成5置入一模具（圖未示）内，再由箭頭 B之方向注入塑料。如圖5所示，在此實施例中，共有三個 注入孔51。 望料係用以固持蓋丨與研磨部3。由於内含固化塑料之研 磨部3並無法達成研磨工件的功能’因此，必須對於塑料 的流動加以控制，以免塑料流到研磨部3的外側區域，縮 短研磨。p 3的使用壽命。如圖4所示，在此實施例中，因為 144588.doc 201121714 模具的設計，注入之塑料先填入蓋丨與研磨部3之間的空間 内，再流經第一對相對槽15、15及第二對相對槽17、17。 由於蓋1之外周緣14的設置，使外周緣14底側141與研磨部 3之頂表面31接觸，塑料無法流出蓋〗之外，而只能滲入研 磨部3内。此外，第一對相對槽15、15之長度係大於第二 相對槽17、17之長度，因此，為避免流過第一相對槽丨5、 15之塑料過多，造成塑料的分布不均勻，在第一相對槽 15、15外側的導壁19、19，藉由其底側191、191至少與研 磨部3之頂表面33接觸，使塑料只能沿導壁19、19流動， 故能引導流經第一相對槽15、15的塑料向第二對相對槽 17、17的方向流過去。藉此，塑料可均勻分布於研磨部3 之特定區域内。 如圖4所示，在注入之塑料固化後，蓋丨與研磨部3形成 黏結，如此而形成一研磨砂輪7。在此研磨砂輪7中，塑料 於蓋1與研磨部3之間形成一固持部53，固持部53具有一軸 孔55 ’用以將研磨砂輪7固定於拋光/研磨工具之轴上。 本發明之製造方法簡單、快速，所製造的研磨砂輪在高 速旋轉時不易破裂（至少15,〇〇〇 rpm都不會破裂），且重量 分布均勻，而使研磨砂輪旋轉時的振動減少。 以上所述為本發明之較佳實施例，但本發明亦可有其他 "又什，如軸孔55上可設有螺紋，以配合旋入拋光/研磨工 具具有相配合螺紋之軸上。此外，亦可將第一相對槽之長 度a又计成與第二相對槽之長度相同，如圖6及圖7所示，藉 此’可視需要決定導壁之設置與否。 144588.doc 201121714 本發明之技術内容及技術特點已揭示如上，然而熟悉本 項技術之人士仍可能基於本發明之教示及揭示而作種種不 背離本發明精神之替換及修飾。因此本發明之涵蓋範圍應 不限於實施例所揭示者’而應包括各種不背離本發明之替 換與修飾’並以下述申請專利範圍為準。 【圖式簡單說明】 圖1為本發明之一實施例之蓋之底視圖； 圖2為沿圖1之線2-2所取之剖視圖； 圖3顯示將圖1之蓋置於研磨部上之剖視圖； 圖4 ”肩示將塑料/主入s亥蓋與該研磨部間之空間及該研磨 部内之剖視圖； 圖5顯示塑料於蓋底部之流動示意圖； 圖6為本發明之另一實施例之蓋之底視圖；及 圖7為沿圖6之線7-7所取之剖視圖。 【主要元件符號說明】 1 蓋 3 研磨部 5 總成 7 研磨砂輪 10 蓋體 11 穿孔 13 環周壁 14 外周緣 15 第一對相對槽 144588.doc 201121714 17 第二對相對槽 19 導壁 31 中心孔 33 頂表面 51 注入孑L 53 固持部 55 軸孔 141 外周緣之底側 191 導壁之底側 A 箭頭 B 箭頭 144588.docNext, a polishing portion 3 is provided, and the polishing portion 3 has a substantially central hole 3 1 and a top surface 33. The woven fabric is made in this embodiment, but may be made of other materials or the like. Next, the peripheral wall 13 of the cover i is placed in the center hole of the polishing portion 3, and the bottom side (4) of the outer periphery 14 of the bottom of the cover i is in contact with the top surface of the grinds, and the bottoms of the two guide walls 19 and 19 are bottomed. The sides 191, 191 are in contact with at least the top surface 33 of the polishing portion 3. As shown in FIG. 3, in the present embodiment, the bottom sides 191, 191 are directly pressed into the polishing portion 31. Thereby, the cover (9) grinding portion 3 forms an assembly. As shown in Fig. 4, the assembly 5 is placed in a mold (not shown), and the plastic is injected in the direction of the arrow B. As shown in Fig. 5, in this embodiment, there are three injection holes 51 in total. The material is used to hold the lid and the polishing portion 3. Since the grinding portion 3 containing the cured plastic cannot achieve the function of grinding the workpiece, it is necessary to control the flow of the plastic so as not to flow the plastic to the outer region of the polishing portion 3, thereby shortening the grinding. The service life of p 3 . As shown in FIG. 4, in this embodiment, because of the design of the 144588.doc 201121714 mold, the injected plastic is first filled into the space between the cover and the grinding portion 3, and then flows through the first pair of opposing grooves 15, 15 And a second pair of opposing slots 17, 17. Due to the provision of the peripheral edge 14 of the cover 1, the bottom side 141 of the outer peripheral edge 14 is brought into contact with the top surface 31 of the polishing portion 3, and the plastic cannot flow out of the cover, but can only penetrate into the grinding portion 3. In addition, the length of the first pair of opposing grooves 15, 15 is greater than the length of the second opposing grooves 17, 17, so that in order to avoid excessive plastic flowing through the first opposing grooves 5, 15, the distribution of the plastic is uneven, The guide walls 19, 19 on the outer side of the first opposing grooves 15, 15 are at least in contact with the top surface 33 of the polishing portion 3 by the bottom sides 191, 191, so that the plastic can only flow along the guide walls 19, 19, so that the flow can be guided. The plastic passing through the first opposing grooves 15, 15 flows in the direction of the second pair of opposing grooves 17, 17. Thereby, the plastic can be uniformly distributed in a specific region of the polishing portion 3. As shown in Fig. 4, after the injected plastic is cured, the lid is bonded to the polishing portion 3, thus forming a grinding wheel 7. In the grinding wheel 7, a plastic portion is formed between the cover 1 and the polishing portion 3, and the holding portion 53 has a shaft hole 55' for fixing the grinding wheel 7 to the shaft of the polishing/grinding tool. The manufacturing method of the present invention is simple and rapid, and the manufactured grinding wheel is not easily broken at a high speed (at least 15, 〇〇〇 rpm is not broken), and the weight distribution is uniform, and the vibration when the grinding wheel is rotated is reduced. The above description is a preferred embodiment of the present invention, but the present invention may have other features. For example, the shaft hole 55 may be provided with a thread to match the shaft of the screw-in polishing/grinding tool having a mating thread. Further, the length a of the first opposing groove may be calculated to be the same as the length of the second opposing groove, as shown in Figs. 6 and 7, whereby the setting of the guide wall may be determined as needed. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The scope of the invention is therefore not to be construed as being limited to BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a bottom view of a cover according to an embodiment of the present invention; FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1; FIG. 3 is a view showing the cover of FIG. Figure 4 is a cross-sectional view showing the space between the plastic/main s-cover and the polishing portion and the inside of the polishing portion; Figure 5 is a schematic view showing the flow of plastic at the bottom of the cover; Figure 6 is another embodiment of the present invention. The bottom view of the cover of the example; and Fig. 7 is a cross-sectional view taken along line 7-7 of Fig. 6. [Explanation of main component symbols] 1 cover 3 grinding section 5 assembly 7 grinding wheel 10 cover 11 perforation 13 circumferential wall 14 Outer circumference 15 first pair of opposite grooves 144588.doc 201121714 17 second pair of opposite grooves 19 guide wall 31 center hole 33 top surface 51 injection 孑L 53 retaining portion 55 shaft hole 141 outer peripheral bottom side 191 bottom side A of the guide wall Arrow B arrow 144588.doc