JPH02172674A - Laminated cloth grinding ring and manufacture thereof - Google Patents

Abstract

PURPOSE: To uniformly grind even a complicated surface to be ground by alternately forming sector-shaped coated areas and sector-shaped uncoated areas on a surface of a base cloth to increase the flexibility and elasticity and uniformly distribute abrasive particles on the surface of the grinding wheel. CONSTITUTION: Abrasive particles are coated in the pattern held in a sector- shaped first area on each cloth layer, and the first area is separated by a generally sector-shaped second area having no abrasive particles. In addition, the first area is arranged so as to be placed on the second area of the adjacent cloth layer in one cloth layer. At least a part of the abrasive particles in the first area of the cloth layer is extended to a working surface of an outer circumferential part within the lamination.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides an rtll polishing wheel that can be used for grinding and polishing metal, wood, etc., more specifically, a plurality of +ilt polishing wheels coated in a specific pattern. The present invention relates to a polishing wheel made by laminating fabric layers, particularly nonwoven fabric layers, and a method for manufacturing the same.

<Prior art> Conventionally, a flexible Q1 abrasive material is made of a non-woven fabric as a base material, and a sheet-like or disc-like one-bly prepreg obtained by adhering abrasive particles to the entire surface or on spots is laminated onto the non-woven fabric. The sheet-like ωjP: material and disc-shaped abrasive wheels made by the above-mentioned methods were known as flexible abrasive articles. The purpose of partially adhering the abrasive particles to the surface of the nonwoven fabric base material of OneBly is to maintain the flexibility and elasticity of the nonwoven fabric so that it can fit well into the curved surface to be polished when used for polishing. For example, machito 11i15
No. 7-501365 (Japanese Patent Application No. 56-502785) discloses an abrasive article containing small agglomerates of abrasive material supported within a matrix of nylon or polynisder fibers, but due to its structure, it does not have sufficient flexibility. Moreover, the distribution of abrasive particles on the polishing surface is not uniform. Matami Kai Showa 61-
No. 154667 (Utility Application No. 6O-39296) states that ``A composition mainly composed of a thermosetting resin containing 20 to 90% of abrasive particles is applied as a coating material 2 with a surface coverage of 5 to 50% and a space filling rate. A sheet-like or disk-like nonwoven fabric with a partial and regular pattern arranged at a ratio of 0.5 to 50% υ1 evenly applied in a size not exceeding the spread including a fingertip-sized circle!l!
1ill of plate-shaped or disk-shaped nonwoven fabric made by laminating and molding cloth
Discloses an idea called "polishing material". This is because the outer periphery, which is the polishing surface, has parts where a large number of abrasive particles overlap and parts where no abrasive particles are present, which tends to result in uneven distribution of the abrasive. This has the disadvantage that there are areas where polishing can be done well and areas where polishing cannot be done, making it impossible to achieve a uniform finish on the work surface.

<Problems to be solved by the invention> Overcoming the deficiencies of the conventional techniques as described above, we developed a non-woven polishing wheel that is highly flexible, elastic, and has a uniform distribution of abrasive particles on the polishing surface. It has been desired for a long time that even complex surfaces to be polished can be uniformly polished by this method.

Means for Solving the Problems〉 As a result of numerous experiments by trial and error conducted by the present inventors, an organic binder composition mainly composed of an adhesive resin containing abrasive particles was applied to a sheet-like or disk-like fabric. Preferably, a fabric (preferably a non-woven fabric) obtained by pressure-woven lamination molding of a plurality of fabric layers obtained by coating a surface of a non-woven base fabric so as to form a specific pattern with coated areas and uncoated areas. In the polishing wheel, the pattern on the surface of the base cloth is generally fan-shaped (or pie-shaped)! i! The present invention is characterized in that cloth regions and fan-shaped uncoated regions are alternately formed. A plurality of coated fabrics may be cut into circles before being laminated, or the outer peripheral surface of the polished fabric may be finished into a laminated pattern. The organic binder composition containing abrasive particles is distributed evenly on the outer peripheral surface constituting the working surface of the abrasive wheel (5L).Based on these findings, the present invention has been achieved by overcoming the deficiencies of the prior art. I ended up doing it.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A nonwoven polishing wheel and a method for manufacturing the same according to the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 are diagrams C illustrating patterns of opening applied to the polishing wheel of the present invention.

FIG. 1 is a general perspective view showing a type III example of the polishing wheel of the present invention. When manufacturing this polishing wheel, an abrasive-containing binder is applied to the surface L of the non-woven base fabric. The layers constitute a unit of lamination, and every other m sector on each layer is coated with an abrasive-containing binder, so that it is coated in a diagonal striped pattern in the sector coated area. A plurality of the resulting discs (disc-shaped articles) or layers, in the case of this figure six discs, are each impregnated with an adhesive lvl solution for laminated manufacturing and then laminated under heat and pressure. The abrasive-containing binder solution coated fan-shaped area and the red-painted T5 fan-shaped area are stacked at alternate positions for each unit layer.

FIG. 2 is a cross-sectional view of the fan-shaped pattern polishing wheel of the present invention shown in FIG. It does not show a rectangular structure of abrasive coated areas with uncoated areas surrounded by stripes.

Similarly, FIGS. 3 through 6 are partial perspective views of various embodiments of polishing for wood. FIG. 3 shows another ω1 abrasive particle application pattern in which alternating sectors of each layer E are applied as part of a radial stripe. FIG. 4 shows an abrasive particle application pattern in which each fabric layer is coated over the entire fan-shaped area to which abrasive particles are to be applied. FIG. 5 shows the dot pattern of the abrasive particles, and FIG. 6 shows the checkered pattern.

The nonwoven base fabric forms a pattern of alternating abrasive coated sector areas and uncoated sector areas by application of the abrasive binder.

As the nonwoven base fabric, for example, synthetic fibers such as nylon, polyester, and acrylic can be used.
As the rtne particles, for example, silicon carbide, aluminum oxide, chromium oxide, Mary flint, etc. can be used, and JIS 36m to 3.000
You can use any of the following numbers (average particle size: 5
00-5μI).

In addition, examples of adhesive resin include phenol resin,
Epoxy resin, urethane resin, etc. can be used.

As shown in the figure, the coating pattern of the J8 bonding composition containing the adhesive resin as a main component on the base fabric has a fan-shaped area where the abrasive particles are applied and a fan-shaped area where the abrasive particles are not coated (no abrasive particles are contained). A pattern consisting of and a pattern consisting of the patterns are made to exist alternately. It is also desirable to form a regular pattern in this fan-shaped application area in order to obtain a uniform distribution of abrasive particles on the polishing surface. It is desirable that the width of the resin be made smaller by about 1 to 10% than the width obtained by an appropriate method. Next, as shown in FIGS. 3 and 4, the disks are stacked so that the areas coated with abrasive particles and the areas not coated with abrasive particles overlap each other, and as shown in FIG. Push up to.

Heat-curing or moisture-curing or light, on each disc in advance
By impregnating it with an ultraviolet curable type resin, or by applying a foamable urethane resin at the shrinking stage, it is made into a compressed disk-shaped non-woven fabric. The number of fabric layers is typically about 10 per inch of thickness.
varies from about 18 to about 18, but preferably about 12-16
, most preferably 14 layers per inch. rtn i
The thickness of the ring varies depending on its intended use, but is usually 0.
5 to about 4 inches.

As shown in the drawing, since the abrasive particles overlap alternately, the organic binder composition containing the abrasive particles is regularly arranged on the polished surface of the object to be polished by rIII polishing, resulting in a very uniform surface. A Q1@ working surface with a distribution will be obtained.

The applied area can also be patterned in a regular pattern, such as diagonal stripes, radial patterns, etc.
By forming a polka dot pattern, a lattice pattern, etc., it is possible to obtain a polished surface that imparts flexibility and has a uniform distribution of the organic binder composition containing abrasive particles.

In contrast to the 01-layer wheel of the present invention, the prior art, for example, the nonwoven fabric polishing wheel disclosed in the above-mentioned Utility Model Application Publication No. 154667/1987, as shown in FIG. The nonwoven base fabric coated with the lumps was laminated to form a product as shown in Figure (8).

That is, a nonwoven fabric is coated with thermosetting resin containing abrasive particles in regular dots as shown in Figure (7), and when this is laminated and pressed together, it forms as shown in Figure (8). As mentioned above, the outer periphery, which is the surface for polishing, tends to be in a state where the abrasive is not evenly distributed, such as areas where many abrasive particles overlap and areas where there are no abrasive particles at all, which makes it possible to perform Ttll polishing well. There are some parts that cannot be done,
The disadvantage was that the finished surface was uneven.

(Example) Examples of the nonwoven fabric polishing wheel and the manufacturing method thereof according to the present invention will be described.

The non-woven fabric used as the base fabric is 15 denier nylon staple fiber, and mmfffffi1
Landau Unituber so that it is 10g/TrL2
(Rando Wcbber) *[1 foot open web] was formed into a one-foot open web, and polyurethane [trade name: Azoplan B L-
16' (commercially available as Adeprane BL-16)] at a coating weight of 60 g/TrL2 (dry weight exchange) by roll coating, and dried and cured.

The applied resin was prepared as follows.

Solvent curing agent main component 1 Cellosolve acetate methylene dianiline urethane brevolimer Diameter part 599 parts 104 parts 297 parts On the above non-woven fabric base fabric, the following polishing 1 m! A resin containing i-abrasive grains was applied.

Component 2 Heavy solvent Ethylcarpitol 166 resin
Fetrick resin 261 touches! flit
50% NaOH 0.5 Thickener Carbocil 0.7 Abrasive Aluminum Oxide" 180 5G, 2 The coating method was the screen method. That is, the diagonal striped pattern shown in Figure 1 was made on cardboard. Place it on top of a non-woven base fabric that has been made into a circular shape, drop the coating liquid shown in component 2 on top of it, and squeeze it to create a striped coating pattern on the non-woven base fabric. The coated material was dried and cured at 160-180°C to form an abrasive disc (prepreg).

The abrasive disk (prepreg) is then impregnated with the resin of component 3 described below, mounted on the motor shaft, and
After rotating at 00 RPM to remove excess resin, 14 sheets were stacked so that the coating patterns overlapped alternately, compressed to 25 ml, dried, and then dried and cured at about 130° C.

Component 3 Heavy solvent Cellosolve acetate 41.71 Curing agent Methylene dianiline 2.94 Base agent
Polyurethane prepolymer 53.33 Lubricant Lithium stearate 2.02 In this example, the application area of the abrasive particles on each disk is fan-shaped and overlaps alternately for each layer. surface), which results in an even distribution of the abrasive application over the entire polishing wheel working surface.

As a result, the ωl-polished gold bottom surface has a 57-50136
The so-called unpolished portion, which is often seen in the polishing wheel of No. 5, was no longer present in the Ti1l polishing wheel of the present invention, and a very uniform metal surface to be polished was obtained.

Effectiveness> The nonwoven fabric polishing wheel of the present invention is flexible, elastic, strong, and durable due to its characteristic structure. It can be polished by blending well with rough surfaces to be polished, making the polished surface uniform, and has a long usable life.

[Brief explanation of the drawing]

Figures 1 to 6 are diagrams showing various coating patterns of the abrasive particles on the nonwoven base fabric of the present invention. FIG. 1 is a general perspective view showing an example of a nonwoven polishing wheel. FIG. 2 is a sectional view of the nonwoven base fabric shown in FIG. 1. FIG. 3 is a partial perspective view of a polishing wheel of the present invention having a different pattern of application of abrasive particles. Similarly, FIGS. 4, 5, and 6 are partial perspective views showing polishing wheels of the present invention having different coating patterns.

Claims (7)

[Claims] (1) Consists of a densified flexible laminate of multiple layers of binder-coated fabric in which abrasive particles with a specific pattern are bonded and held on the surface of the fabric by a binder, and has a work surface around its outer periphery. In the abrasive wheel, the abrasive particles on each fabric layer are applied in a pattern maintained within a generally sector-shaped first region;
and the first region is separated by a generally fan-shaped second region having no abrasive particles, and the first region is separated from the second region in an adjacent fabric layer in one fabric layer. and so that within the laminate, at least a portion of the abrasive particles in the first region of each fabric layer extend to the peripheral working surface. Polishing wheel. (2) The polishing wheel according to claim 1, wherein the fabric is a nonwoven fabric. (3) The polishing wheel according to claim 1, wherein the first region and the second region form a regular pattern. (4) The polishing wheel according to claim 1 or 3, wherein the pattern of the polishing particles is a uniform coating or a regular pattern of diagonal stripes, radial stripes, polka dots, or checkered patterns. (5) selectively applying a mixture of a binder and abrasive particles to a plurality of fabric layers in a generally fan-shaped pattern separated by second generally fan-shaped regions having no abrasive particles; providing a generally sector-shaped first region containing abrasive particles; placing a first region of one fabric layer overlying a second region of an adjacent fabric layer; A laminate is created by stacking a plurality of fabric layers coated on the fabric under sufficient pressure and, if necessary, by heating, and finishing the edges of the laminate as necessary to form a ring shape having a working surface on the outer periphery. A method for manufacturing an abrasive wheel, characterized in that it consists of making an object. (6) Each of the fabric layers is a thermosetting resin, a moisture curable resin,
The polishing wheel according to claim 5, wherein the polishing wheel is impregnated with a binder resin selected from a photocurable resin or an ultraviolet curable resin. 7. The abrasive wheel of claim 5, further comprising cutting the coated fabric pieces into disk shapes before the stacking step.