KR20050092361A - Polishing piece, polishing lap, and method of polishing glass panel for crt - Google Patents

Abstract

A method for manufacturing a polishing lap (1) capable of firmly fixing a polishing piece onto the upper surface of a base layer without using a vulcanized forming device and a vulcanized forming process for unvulcanized rubber material layer, comprising the steps of forming both end pars of the piece (8) in a general flat or a general recessed curve surface without providing any irregular part for increasing an engagement force on the outer periphery of the polishing piece (8), and pressingly fixing the piece (8) into an adhesive layer (12) on the base layer (7) at any end side of the piece (8), whereby a working efficiency and an economic efficiency can be remarkably increased more than that of a system pressingly fixed into the unvulcanized rubber material layer and, since the polishing piece (8) is firmly fixed to the base layer (7), and accidents such as falling down and falling during polishing operation can be prevented.

Description

Polishing piece, polishing lap, and method of polishing glass panel for CRT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing piece, a polishing wrap having the polishing piece, and a polishing method for a glass panel for a cathode ray tube using the polishing wrap, and more particularly, mainly for a television (hereinafter, referred to as a TV). The present invention relates to a polishing piece used in a panel surface polishing step of a cathode ray tube, a polishing wrap having the polishing piece, and a polishing method of a glass panel for a cathode ray tube using the polishing wrap.

Conventionally, as the structure of this kind of polishing piece and the polishing wrap using the same, the one described in Japanese Patent Application Laid-open No. 40-28753 is generally employed, but the basic configuration thereof has not changed basically at present. That is, the CRT glass panel is fixedly arranged on the turntable with its outer surface facing upward, and is rotated almost horizontally, and the front surface of the panel is rotated in contact with the polishing piece along the iron curved surface of the panel from above. To polish. In addition, the grinding | polishing piece uses the thing of various materials and shapes for each grinding | polishing process of primary polishing, intermediate polishing, finishing, and polishing.

In this case, for use as the primary polishing piece, as shown in FIG. 6 (a) attached to the present specification, a polishing piece 201 made of steel or cast iron (blocks 74 and 92 in the above patent publication) is used. The abrasive piece 201 is embedded in the unvulcanized rubber layer 203 (the flexible materials 76 and 88 in the patent publication) constituting the base layer 202, and then buried, and the vulcanized rubber layer 203 is vulcanized and solidified. The piece 201 is fixed on the base layer 202 to form a polishing wrap 210. 204 is a base of a hard foaming agent or the like constituting the base layer 202.

Recently, in the polishing wrap 210 which only vulcanizes the round rod-like and cylindrical-shaped polishing pieces 201 in the unvulcanized rubber layer 203, the buried portion is loosened by the frictional force during the polishing operation and the polishing pieces 201 fall. In order to prevent this, as shown in FIG. 6 (b), an uneven portion, for example, a ring for strengthening the bonding force with the rubber layer 203 after vulcanization, is prevented because many accidents occur. The polishing piece 206 in which the groove part 205 of the shape was formed in the vicinity of the embedded end part is used.

However, the above conventional technology has many disadvantages as follows. That is, first, since the polishing pieces 201 and 206 have to be vulcanized and fixed after arranging and pressing the unvulcanized rubber layer 203, an expensive vulcanizing molding die is required. In addition, since this mold must be prepared in accordance with the size of the glass panel surface for the CRT, investment in equipment is enormous, and a large number of mold installation and storage places are required.

Second, in the polishing piece 206 provided with the coupling concave-convex portion at the lower end side, the polishing piece 206 is checked one by one with the eyes of the end where the coupling groove 205 is provided with respect to the unvulcanized rubber layer 203 at the time of setting up the vulcanizing molding machine. Since press-injection must be carried out, work efficiency and personnel efficiency fall. In particular, this drawback tends to increase with respect to the manufacturing process of the large-area polishing wrap used for polishing the glass panel of the wide-screen large-area CRT tube for TVs having a supply width of more than 40 cm in recent years.

Third, the power consumption used as a heat source for vulcanization of the unvulcanized rubber layer 203 is enormous. Furthermore, not only the considerable time is required for the post-vulcanization of the rubber layer 203 but also the effort and effort for removing it from the vulcanization molding machine are enormous, resulting in poor work efficiency and personnel efficiency.

Fourth, the manufacture of the polishing piece 206 with the joining groove 205 requires a work forming process such as the joining groove 205 using a cutting tool after forming the rod-shaped piece, thereby increasing the number of steps and the corresponding cost. Entails.

Fifth, as a constitution of the base layer 202 of the polishing wrap 210, a base 204 such as a hard foaming agent is pressed and laminated on the single layer or the intermediate layer of the vulcanized rubber layer 203, and the base layer 202 is a polishing piece 201 made of steel or cast iron. By firmly embedding 206, neither the base layer 202 nor the polishing pieces 201 and 206 can be reused. In order to recover only the polishing pieces 201 and 206, it is necessary to incinerate or dissolve and remove the base layer 202, but it is impossible to recover and reuse them inexpensively because the cost is high and causes air pollution and water pollution. It's close.

The present invention has been made to solve the above situation. First, the present invention can securely fix the polishing piece to the base layer without employing a rubber layer requiring vulcanization by using many kinds of expensive molds. An object of the present invention is to provide a polishing piece and a polishing wrap having the same.

That is, without using unvulcanized rubber, a wrap base material (in the case of aspherical type) composed of a hard lower layer, a flexible intermediate layer, and a hard upper layer is formed, or a wrap base material composed of a hard lower layer and a hard upper layer (in the case of a flat type). ), And using a small frame that can accommodate it is enough.

Therefore, the burden of facility investment becomes very small compared with the said vulcanization molding die, and the area of an installation place and a storage place does not become large.

Here, the "aspherical surface type" means that the surface of the glass tube for CRT is not completely spherical but is composed of a plurality of spherical surfaces having different curvatures, and the term "flat type" means that the surface of the glass panel for CRT is the outermost. It refers to a type formed of a completely flat surface except the circumference. In addition, many of what are currently referred to as planar types include both aspherical and near-flat types, which have a very large curvature and are close to flat surfaces.

Secondly, the present invention can be press-fitted into the adhesive layer of the base material from any end of the piece without providing any joining irregularities on the outer circumference of the polishing piece, and also firmly adheres to accidents such as falling or falling off during the polishing operation. An object of the present invention is to provide a polishing piece that does not cause the polishing piece and a polishing wrap having the same.

Third, the present invention does not require an unvulcanized rubber layer, and the polishing piece for fixing the polishing piece to the base layer in a very short time compared to the time required for the vulcanization process required for the formation of the rubber layer and having the same An object of the present invention is to provide a polishing wrap.

Fourth, the present invention does not require any cutting or other additional forming step after forming a steel or resin rod-shaped piece of a predetermined size in the manufacture of the polishing piece, thereby reducing the number of steps and reducing the cost. An object of the present invention is to provide a polishing piece that can be realized and a polishing wrap having the same.

Fifth, the present invention uses a steel sheet in the lower layer as the base structure of the polishing wrap, and can directly adhere and laminate an adhesive to the steel polishing piece so that the steel polishing piece can be firmly fixed. An object of the present invention is to provide a polishing piece that can reuse a piece for many times and a polishing wrap having the same.

Sixth, this invention makes it a subject to provide the grinding | polishing method especially suitable for grinding | polishing of a glass panel for CRT by using the grinding | polishing piece and the grinding | polishing wrap which solved the subject of said 1st-5th.

In order to solve the said subject, Claim 1 of this invention is a rod-shaped piece cut | disconnected to predetermined length WHEREIN: The shape of either the substantially flat surface or almost curved surface in the both end surfaces of the rod-shaped piece. It provides a polishing piece characterized in that the common configuration.

The polishing piece according to claim 1, wherein the polishing piece is made of any one of a metal material, a ceramic material, and a resin material.

The polishing piece according to claim 1 or 2, wherein the polishing piece according to claim 1 or 2 is provided with a chamfer formed at the periphery of both end faces.

A polishing piece according to any one of claims 1 to 3, wherein the polishing piece according to any one of claims 1 to 3 is provided with a convex convex portion on the substantially flat surface or almost the curved surface.

5. The polishing piece of claim 4, wherein the polishing piece of claim 4 is provided with a polishing piece, wherein the required convex portion is formed in a fine embossing shape or at least one small groove shape.

The polishing piece according to any one of claims 1 to 5, wherein the cut bar-shaped steel material is formed collectively and integrally in a desired shape in one step by cold rolling. A polishing piece is provided.

Claim 7 of the present invention forms an adhesive layer by applying an adhesive on the base layer surface of an iron plate or a rigid elastomer sheet having some flexibility, and almost both end portions of the rod-shaped piece material cut into desired lengths in the adhesive layer. A plurality of polishing pieces, which are commonly formed in any one of a surface or a substantially curved surface, are inserted and arranged at predetermined intervals, and the adhesive layer is dried and solidified to fix the polishing piece to the base layer surface. Provide a wrap.

[8] The polishing wrap according to claim 7, wherein the polishing wrap according to claim 7, the polishing wrap is a panel surface polishing wrap for a CRT.

9. The polishing wrapper according to claim 7 or 8 provides a polishing wrapper, wherein the hard elastomer sheet is a polyurethane sheet.

Claim 10 of the present invention provides a polishing wrap according to any one of claims 7 to 9, wherein the adhesive is an epoxy resin adhesive.

The polishing wrapper according to any one of claims 7 to 10, wherein the press-in arrangement of the polishing piece to the adhesive layer is a through hole through which the polishing piece can pass. Arranging and arranging a plurality of array gauge plates arranged in advance at predetermined intervals above the adhesive layer, and passing the polishing pieces through the through-holes from any one of the both end portions thereof and press-fit into the adhesive layer. Provide a polishing wrap.

The 12th aspect of this invention provides the grinding | polishing method of the glass panel for CRTs which used the grinding | polishing wrap of any one of Claims 7-11.

Action

According to the polishing piece of claim 1, both cross-sections of the rod-shaped piece are commonly formed in either a substantially flat surface or a substantially curved surface to be inserted into an adhesive layer of the base layer arbitrarily toward either end of the piece. I can attach it. As a result, hundreds to thousands or more pieces are mounted efficiently and firmly adhered to any one of the base layers of the elastomer sheet layer, for example, a hard polyurethane layer and a steel sheet, which have a high degree of plasticity. It does not cause falling or dropping of the polishing piece, and does not damage the panel surface of the CRT. Moreover, although a columnar shape is normally used as a piece for grinding | polishing, it is not limited to this, Rod-shaped pieces, such as a cross section ellipse or a polygon, may be sufficient. As the piece material, steel pieces or ceramic pieces for primary polishing, ceramic pieces for intermediate polishing or hard synthetic resin pieces, pieces of soft synthetic resin for finishing and polishing, and other materials can be used. .

In particular, in the case where the cross-section is a curved surface that is slightly curved to the inside of the bar-shaped piece, a certain amount of adhesive is inserted between the curved surface and the steel sheet surface or polyurethane layer surface of the curved surface when press-fitted into the adhesive layer. Therefore, even if the press-in pressure of the piece is so strong that the outer periphery of the press-in end of the piece touches the steel plate or the like, a strong adhesive force can be secured without pushing the adhesive away from the end surface for bonding. have.

Furthermore, even when no smooth protrusions are formed on both end surfaces which are almost flat surfaces, even when the smooth surface is formed, the upper surface portion of the polishing piece is formed from the bottom of the back surface of the polishing wrap, for example, the bottom of the hard lower layer in the aspherical surface type. Press-fitting pressure of the piece by pressing the polishing piece into the adhesive layer by using a pressing auxiliary plate whose pressing distance is controlled by a stopper or the like which can be controlled to at least 1/100 mm level by setting the distance at the completion of fixing to Even if this is too strong, strong adhesive force can be secured without pushing the adhesive away from the end surface for adhesion. In this case, it is preferable to control the pressure auxiliary plate described later so that an adhesive layer of 0.1 mm to 0.5 mm can be secured between the piece pressing end and the surface of the wrap base layer. However, the interval for securing the adhesive along the front and back of this range is also a modification included in the present invention.

According to the polishing piece of claim 2, the material of the rod-shaped piece can be firmly adhered to the base layer formed of any of a metal material, a ceramic material, or a resin material. It can be applied to any polishing wrap for polishing.

According to the polishing piece of claim 3, the peripheral edges (circumferential edges) of both end portions are chamfered at an appropriate angle to form an almost flat surface or an almost curved surface therein, so that the piece is smoothly on the surface to be polished. It can move, for example, and can perform a grinding operation without damaging the panel surface for glass CRT tubes.

The polishing piece according to claim 4 or 5, wherein the required convex portions having fine embossed shapes are formed on both end surfaces which are substantially flat surfaces, or the required convex portions formed by one or more groove-shaped portions are formed, thereby providing a substantially As in the case where the curved surface is formed, a certain amount of adhesive can be put and secured, thereby ensuring a strong adhesive force. In addition, even when both end portions of the piece are formed to have almost curved surfaces, providing the required convex portions can bring about a stronger adhesive force.

According to the polishing piece of claim 6, since the cut bar-like steel can be formed into a predetermined length and a desired shape by one blow forging step by cold forging, a polishing piece having extremely good production efficiency can be obtained. In particular, even when the shape of both end faces of the piece is made according to any one of claims 1 to 4, the batch and integral molding by cold forging is easy, so that the production efficiency can be improved and the cost can be reduced. Contribute.

According to the polishing wrap of claim 7, by applying an adhesive on the base layer surface made of iron sheet or hard elastomer sheet, press-fitting the rod-like polishing pieces at predetermined intervals in the adhesive layer, and drying the solidified adhesive layer, Since the polishing piece can be firmly fixed to the surface of the base layer, the work can be performed simply and quickly, and thus the work efficiency and the staff efficiency are extremely good.

According to the polishing wrap of claim 8, it is very suitable for a panel polishing pad of a CRT, in particular, a polishing pad for arranging polishing pieces made of steel or ceramic. It was possible to firmly fix the steel or ceramic piece material, which was conventionally difficult, and the hard elastomer sheet or iron plate wrap base material.

According to the polishing wrap of claim 9, it is possible to fix firmly between the steel or ceramic piece material and the polyurethane wrap base material which is used as a standard among the hard elastomer sheets.

According to the polishing wrapper of claim 10, by using, for example, an epoxy resin adhesive as the adhesive, it is possible to firmly fix the steel or ceramic piece material and the hard elastomer sheet or iron plate wrap base material.

According to the polishing wrap of claim 11, the press-fit arrangement of the polishing piece to the adhesive layer is provided with an array gauge plate in which a plurality of through holes which can pass through the polishing piece are arranged in advance at predetermined intervals above the adhesive layer. It is only necessary to fix the polishing piece, press the through-hole through the through-hole from one of the selected end portions of the both end portions thereof, and wait for the adhesive layer to dry and solidify. It can be.

According to the grinding | polishing method of Claim 12, since the grinding | polishing wrap which has the characteristics of any one of Claims 7-11 is used, it is optimal and useful as a grinding | polishing method of the glass panel for CRT.

Brief description of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows one Embodiment of the structure of the polishing wrap which concerns on this invention, and its assembly mechanism.

FIG. 2A is a diagram illustrating a partially enlarged cross section of part A of FIG. 1, and FIG. 2B is a diagram illustrating a partially enlarged cross section of another embodiment of the A part.

3 is a front view showing another embodiment of a polishing piece according to the present invention.

4 is a cross-sectional view taken along the line BB of FIG. 3.

It is a top view which shows the cross section of a grinding | polishing piece.

6 (a) is a partially omitted cross-sectional view showing one embodiment of a conventional wrap base layer and a polishing piece, and (b) is a partially omitted cross-sectional view showing another embodiment of a conventional wrap base layer and a polishing piece.

In these figures, reference numeral 1 denotes a polishing wrap, 2 an array gauge plate, 3 a pressing auxiliary plate, 4 a hard nonwoven base layer, 5 a flexible base layer, 6 a piece adhesion layer, 7 a base layer, and 8 Silver polishing pieces, 8a and 8b are chamfered portions, 12 are adhesive layers, 21 are through holes, 71 are base layers, 82a and 82b are end faces, 83 and 84 are curved portions, and 85 are required convex portions.

Best Mode for Carrying Out the Invention

Fig. 1 shows a circular polishing wrap 1, an array gauge plate 2 and a pressure auxiliary plate 3 according to the present invention as a wrap for polishing aspheric of the glass panel surface of a glass tube for an aspheric surface type.

The polishing wrap 1 is a base layer 7 composed of a rigid nonwoven fabric base layer 4 made of nylon fibers at the bottom layer, a flexible base layer 5 made of a flexible sponge as an intermediate layer, and a piece adhesion layer 6 made of a hard polyurethane at an upper layer thereof, and an adhesive agent. It consists of a plurality of cylindrical polishing pieces 8 fixed at predetermined intervals to almost the entire surface of the surface of the piece adhesion layer 6 via a layer.

The polishing wrap 1 rotates the lap via a screw (not shown) that can pass through a screw hole 9 having a plurality disposed along the outer circumference of the hard nonwoven base layer 4 and a screw hole 10 disposed at a central portion thereof. It is connected to a drive mechanism (not shown). 11 is a connector provided in the center portion of the rigid nonwoven base layer 4 to connect the abrasive grain slurry supply pipe.

In FIG. 2A, a partially enlarged cross-sectional view of part A of FIG. 1 is shown. Both end surfaces of the polishing piece 8 are formed in a flat surface that is substantially orthogonal to the center axis of the piece 8, and chamfers 8a and 8b are formed at both edges of the end portion, so that the glass panel surface for the CRT is an abrasive material (not shown). Is not installed to prevent friction damage or cracks. In addition, according to the polishing purpose in the manufacturing process of the polishing piece 8, the addition of garnet powder or other hard mineral powder to the iron or ceramic material, which is the main material of the piece 8, to increase the polishing capability is carried out according to the polishing purpose. Yes.

FIG. 2 (b) shows a partially enlarged cross-sectional view of the polishing wrap 101 of the glass panel face for flat type CRTs, as compared to the polishing wrap 1 of the glass panel face for the aspheric type CRT shown in FIG. have. In the case of the flat type, since the panel surface of the CRT is completely flat, the entire polishing wrap 1 does not need to move as it is while flexibly bending along the curved surface of the panel like the aspherical type. Therefore, as the base layer 71 of the polishing wrap 101, a piece of hard polyurethane on the rigid nonwoven fabric base layer 4 for connecting to a wrap rotating mechanism (not shown) without interposing a flexible sponge-based flexible base layer 5 as an intermediate layer. The adhesion layer 6 is laminated | stacked, and the polishing piece 8 is stuck to this through the adhesive bond layer 12. In addition, in some cases, instead of the structure of the hard polyurethane piece adhesion layer 6 shown in FIG. 2 (b) as the base layer 71, a single steel plate base layer (not shown) may be used.

12 is an adhesive layer applied to the surface of the hard polyurethane piece attaching layer 6, and is about 8,500 cps at a temperature of 25 ° C. in order to make it possible to firmly fix the steel or ceramic polishing piece 8 to the piece attaching layer 6. An epoxy resin adhesive having a viscosity of 2 mm to 3 mm is applied when the diameter of the polishing piece 8 is around 14 mm. The viscosity of the adhesive and the coating method are not limited to this, but the material relationship between the piece attachment layer 6 and the polishing piece 8, the diameter dimension of the polishing piece 8, the rotational torque of the wrap 1 and / or the pressure on the glass panel surface for the CRT The pressure shall be adjusted appropriately in consideration of the pressure.

13 is an auxiliary canvas layer, which is intended to improve the shape retention of the base layer 7, and is laminated as necessary.

Another embodiment of a polishing piece is shown in FIG. 4, which is shown in B-B cross-sectional views in FIGS. 3 and 3. The polishing piece 81 is of the same material and shape as the polishing piece 8 except for the shape of both end faces. Both end portions 82a and 82b of the polishing piece 81 have curved surface portions 83 and 84 that are curved inwardly of the piece 81. The curved surfaces 83 and 84 have their outer periphery at least positioned inside the chamfers 8a and 8b, preferably in contact with the edges of the chamfers 8a and 8b. In addition, they are formed almost symmetrically with each other.

By providing the curved surface portions 83 and 84, when the polishing piece 8 81 is press-fitted into the adhesive layer 12, the adhesive can be reliably captured in the curved surface portions 83 and 84 to maintain the fixing force to the piece attachment layer 6.

5 shows another embodiment of the cross section of the polishing piece, which is applicable to both the flat cross section of the polishing piece 8 or to both cross sections of the curved surfaces 83 and 84 of the polishing piece 81. That is, 85 is a myriad of required convex portions formed by fine embossing on both end surfaces, and by providing the required convex portions 85, the adhesive is reliably captured when the abrasive piece 8 (81) is pressed into the adhesive layer 12. Adhesion to 6 can be maintained. As another shape of the required convex portion 85, a plurality of small groove portions, holes (not shown), or the like may be formed.

The depth at which the abrasive piece 8 (81) is press-fitted against the adhesive layer 12 and embedded is the material relationship between the piece attachment layer 6 and the abrasive piece 8 (81), the diameter dimension of the abrasive piece 8 (81), and the rotation of the wrap 1. Although it depends on the torque and / or the pressing force against the glass panel surface for the CRT, etc., when both end portions of the piece 8 are made almost flat, they are not press-filled until they come in contact with the upper surface of the piece attaching layer 6, leaving some gaps. It is necessary to interpose the adhesive layer 12. This slight gap is preferably about 0.1 mm to 0.5 mm when the thickness of the adhesive layer 12 is 2 mm to 5 mm as described above.

On the other hand, like the polishing piece 81, when the curved surface portions 83 and 84 shown in FIG. 4 are formed in the cross-sections and / or the required convex portions 85 shown in FIG. 5 are formed, the upper surface of the piece attachment layer 6 is in contact. Even when it is press-filled, sufficient fixing force can be obtained. In this case as well, a slight gap with respect to the piece adhesion layer 6 may be left to interpose the adhesive layer 12 to further secure the adhesive strength. The same action and effect are also obtained when the required convex portion 85 shown in Fig. 5 is used for the polishing piece 8 having both end faces as a flat surface.

With respect to the base layer 71 of FIG. 2 (b), when the piece adhesion layer 6 is made of steel sheet, the polishing piece 8 is simply heated from the back of the piece attachment layer 6 with a burner or the like after the use of the polishing wrap 1 is finished. Alternatively, 81 can be easily peeled from the piece adhesion layer 6 together with the adhesive layer 12, and then the adhesive layer 12 can be removed from the polishing piece 8 or 81 with a solvent or the like.

Next, the Example of this invention is shown, referring FIG. 1 about the method of press-fitting the polishing piece 8 or 81 to the adhesive bond layer 12, and arranging it. An array gauge plate 2 having a plurality of through-holes 21 that can pass through the polishing pieces 8 or 81 in advance at predetermined intervals is formed and provided so as to cover the upper side of the adhesive layer 12 so as to be fixed. At the time of installation, the outer frame 22 is provided so that the outer base surface of the flexible base layer 5, which is the intermediate layer of the base layer 7, and the outer circumferential surface of the piece attaching layer 6 can be closely fitted, and / or the center tube 23 is used for polishing. The press-in position of the polishing piece 8 or 81 of the adhesive layer 12 can be determined by providing the close insert inside the central recess 15 of the wrap 1, but the present invention is not limited thereto, and an appropriate positioning mechanism (not shown) may be used. The press-in position may be adjusted.

Next, one of the end faces 82a or 82b of the polishing piece 8 or 81 is arbitrarily selected and passed through the through hole 21 from the top of the array gauge plate 2 to be press-filled and embedded in the adhesive layer 12, and then the adhesive layer The polishing wrap 1 is completed by maintaining the state of the pieces 8 or 81 until 12 is dry solidified, and then pulling the array gauge plate 2 upward. In the passage through the through hole 21, the passage length is set to be slightly smaller than the predetermined position, and the press-fit auxiliary plate 3 having the lower surface 31 flat is disposed so as to cover all of the through holes 21 from the top of the array gauge plate 2. Thereafter, this is brought into contact with the upper surface of the array gauge plate 2 and the polishing pieces 8 or 81 are pressed at a time to a predetermined embedding depth, whereby a fixing effect of uniform adhesive force can be brought about.

At this time, when the height h of the outer circumferential frame 22 of the array gauge plate 2 is shorter than the predetermined embedding depth of the polishing piece 8 or 81, the height control device having a stopper or the like which can be controlled to at least 1/100 mm level (not shown) May not be used) to control the pressing distance by the press-fitting auxiliary plate 3.

Although the above-described embodiment of the present invention mainly illustrates a disk-shaped polishing wrap used for priming polishing in the aspheric type glass panel surface for CRT, the present invention is not limited thereto, and the plane is not limited thereto. It is applicable also to a square or rectangular polishing wrap for polishing a glass panel surface for a wide flat type CRT.

First, according to the polishing piece according to the present invention, and the polishing wrap having the same, there is no need to vulcanize the unvulcanized rubber layer using many kinds of expensive molds to form the wrap base layer, and the polishing piece is made through the adhesive. Can be easily and inexpensively adhered to the base layer.

In addition, since it is sufficient to perform the application process of the adhesive and the installation process of the polishing piece in a small frame capable of storing the wrap base layer, the burden of equipment investment is extremely small compared to the vulcanization molding by using the mold. In addition, the manufacturing time of the lab base can be shortened, and the scale of the installation place and storage place is also reduced.

Secondly, according to the present invention, since no concave-convex portion for increasing the bonding force is provided at the outer periphery of the polishing piece, the molding of the piece is simple, and the manufacturing process is small and inexpensive. Moreover, since both end surfaces of the piece have a common shape, it is possible to press-fit the adhesive layer of the base layer arbitrarily from any end side, and thus the work efficiency is extremely good, and the polishing piece is firmly adhered to the base layer and is in polishing operation. It does not cause an accident such as dropping or dropping off.

Third, according to the present invention, since the fixing work to the base layer of the polishing piece can be completed in a very short time compared with the time required for the conventional vulcanization molding process, and there is no power consumption such as a vulcanization heat source, it is rich in economy. Moreover, work efficiency and personnel efficiency are also good because less work and effort can be achieved.

Fourthly, according to the present invention, in the manufacture of the polishing piece, the rod-shaped pieces of steel, ceramic, or resin of a predetermined size are collectively and integrally formed by cold forging, etc. Since no is required at all, reduction in the number of steps and cost reduction can be realized.

Fifth, according to the present invention, when the steel sheet or ceramic plate is used as the configuration of the base layer of the polishing wrap, and the adhesive is applied and laminated thereon to firmly fix the steel or ceramic polishing piece, the base The layers and polishing pieces can be reused any number of times.

Sixth, by using the polishing piece and the polishing wrap of the present invention, it is possible to provide a polishing method that is particularly suitable for polishing a glass panel for a CRT.

Claims (12)

A rod-like piece cut to a predetermined length, wherein both end surfaces thereof are commonly configured in one of a substantially flat surface or a substantially curved surface. The polishing piece according to claim 1, wherein the rod-like piece is formed of any one of a metal material, a ceramic material, and a resin material. The polishing piece according to claim 1 or 2, wherein a chamfer is formed at the periphery of both end faces. The polishing piece according to any one of claims 1 to 3, wherein a required convex portion is formed on the substantially flat surface or almost curved surface. The polishing piece according to claim 4, wherein the required convex portion is formed in a fine embossing shape or at least one small groove shape. The polishing piece according to any one of claims 1 to 5, wherein the cut bar-shaped steel material is formed collectively and integrally in a desired shape in one step by cold rolling. An adhesive layer is formed by applying an adhesive on the base layer surface of an iron plate or a rigid elastomer sheet having a little flexibility, and the both end portions of the bar-shaped piece material cut to the desired length in the adhesive layer are almost flat or almost curved surfaces. A polishing wrap comprising a plurality of polishing pieces formed in common in one shape at a predetermined interval, and arranged to dry and solidify the adhesive layer to fix the polishing pieces to the base layer surface. The polishing wrap according to claim 7, wherein the polishing wrap is a panel surface polishing wrap for a CRT. The polishing wrap set forth in claim 7 or 8, wherein the hard elastomer sheet is a polyurethane sheet. The polishing wrapper according to any one of claims 7 to 9, wherein the adhesive is an epoxy resin adhesive. The polishing wrapper in any one of Claims 7-10 WHEREIN: The press-in arrangement | positioning of the polishing piece to an adhesive bond layer arrange | positions a plurality of through-holes which can pass through a polishing piece at predetermined intervals previously. An array gauge plate is disposed on and fixed to the upper side of the adhesive layer, and the polishing piece is pushed into the adhesive layer by passing through the through hole from any one of both end faces thereof. 12. A polishing method for a glass panel for a cathode ray tube, wherein the polishing wrap according to any one of claims 7 to 11 is used.