KR102435240B1 - A polishing sponge dedicated to polishing the surface of thin-walled glass with folding function - Google Patents

Abstract

The present invention relates to a polishing sponge for a polishing device, which allows for obtaining a clean surface by mass precision polishing of thin sheet glass made of glass material which can be folded through a post-processing process, thereby removing foreign substances which occur in the form of concave or convex shapes on the surface of the sheet glass. The polishing sponge used in a precise polishing device for the surface of the sheet glass in the folded state after primary polishing and the remaining concave surface, convex surface, and boundary surface includes brushes composed of several notches in an area which is in friction with the surfaces. Each of these brushes is provided in such a way that a uniform polishing surface can be obtained by friction with the surfaces. Therefore, the present invention can achieve precise sheet glass surface polishing quality by providing a polishing sponge capable of precisely polishing concave, convex, or sloped surfaces of the surface of sheet glass with a folding function, and the underside of the polishing sponge is each equipped with a brush having notches, enabling the sponge body of the polishing sponge to be attached to a rotary shaft rod of the polishing device, allowing for use without damage by twisting in both normal and reverse rotations, thereby prolonging the lifespan.

Description

A polishing sponge dedicated to polishing the surface of thin-walled glass with folding function

The present invention relates to a polishing sponge exclusively for polishing used by applying the surface of a glass-type thin plate glass to which a folding function is imparted to a polishing apparatus, and more specifically, to a thin glass that can be folded through a post-processing process. It relates to an abrasive sponge dedicated to polishing that allows a clean surface to be obtained by precisely and quickly removing foreign substances generated in the form of engraving or embossing on the surface of the thin glass by precision polishing in large quantities.

In general, recent electronic devices are used as parts that visually provide various information using thin glass sheets of various sizes. Glass-made thin plate glass is attached and used in various products such as

In addition, in recent years, with the development of materials and technologies, various folding operations are realized by applying materials that allow the material properties of glass-made thin glass to be bent or rotated at a certain angle through a post-processing process. Electronic devices that can become

Due to the material characteristics of the thin glass glass used in grafting the folding action into outdated electronic devices, a lot of fatigue pressure and fatigue strength are accumulated in the area where the folding action is made at an arbitrary angle. Polishing in the form of intaglio through a polishing device is essential to minimize the problem.

However, in order to precisely polish only the folded part with the existing polishing device, there is a problem that the entire surface of the thin glass engraved or embossed shape cannot be stably made in the post process after polishing in the engraved form due to the characteristics of the mechanical device and the abrasive.

In relation to this technique, various methods for polishing a conventional thin glass and a technique related to an abrasive are disclosed.

As an example, in Korean Patent Publication No. 10-1186531 (published on October 8, 2012), “

(a) mixing a liquid curing agent containing an active hydrogen group-containing compound, a silicone-based surfactant containing a hydroxyl group, water as a foaming aid, and an abrasive; (b) injecting and mixing a non-reactive gas while stirring and mixing the liquid mixture with a solid-phase curing agent containing an isocyanate group-terminated urethane prepolymer and an active hydrogen group-containing compound; (c) discharging and injecting the mixture into which the non-reactive gas is injected into a mold to form a sheet; (d) curing the molded sheet; and (e) forming micro holes in the cured sheet, and wherein the liquid curing agent is included in an amount of 10 to 70 parts by weight based on 100 parts by weight of the total curing agent including the solid curing agent. There is a method for manufacturing a urethane porous body”,

In addition, in Korean Patent Publication No. 10-2017-0140501 (published date: 2017.12.21), “abrasive particles; At least one thermosetting resin selected from the group consisting of an epoxy resin, a urethane resin, an ABS resin, and a phenol resin; at least one selected from the group consisting of talc, cerium oxide, titanium oxide, copper, cobalt oxide and calcium carbonate; and providing an abrasive resin mixed with a pigment; Fixing a base cloth on a glass surface formed in a plane, and positioning a forming frame made of a metal or Teflon resin perforated in the shape of a polishing tip on the base cloth; forming a polishing tip on a base cloth by injecting the polishing resin into the molding mold; removing the mold and first curing the base cloth with the abrasive tip formed thereon at 110-130° C. for 2-4 hours, followed by secondary curing at 140-160° C. for 2-4 hours; cutting the dried base fabric into a desired shape; and attaching an attachment means with a tool to the back surface of the base fabric.

In addition, in Korea Patent Publication No. 10-1941083 (published on January 29, 2019), “media composed of a mixture of resin and filler, and abrasive particles dispersed in the medium There is an abrasive, wherein the resin is implemented with a silicone resin that is a thermosetting and heat-resistant resin, and the filler includes silicon carbide, cerium oxide, and fumed silica.

In addition, in Korea Patent Publication No. 10-1255523 (published on April 23, 2013), “01 to 80 parts by weight of isocenite, a crosslinking agent with respect to 100 parts by weight of a foaming composition containing a polyester or polyether-based polyol. 001 to 20 parts by weight, catalyst 001 to 10 parts by weight, foam stabilizer 001 to 10 parts by weight, foaming agent 1 to 400 parts by weight including 001 to 50 parts by weight of ZnO, WC, Si3N4, and one or a mixture of two or more selected from glass powder There is a urethane foam polishing pad characterized in that the used inorganic particles are added and foamed.

As described above, the prior art related to the glass polishing apparatus is known,

In Patent Publication No. 10-1186531, a macro groove formed in an X-Y axis orthogonal shape by selectively attaching a support pad to a porous urethane foam, and an X-Y orthogonal shape between the macro grooves, and with the macro groove It aims to provide micro grooves formed with different depths,

The micro-groove is provided on the outer surface of the polishing pad in an X-Y orthogonal shape to increase frictional efficiency during polishing, but only increases frictional efficiency in a specific area of the thin plate glass where folding occurs. There is a problem in that polishing efficiency is lowered in surface polishing,

In addition, in a state in which the entire friction surface of the polishing pad is polished on the folded portion, there is a problem in that the friction of the curved portion and the friction on the intaglio portion cannot be smoothly polished due to the peripheral friction surface having different polishing efficiency of the friction surface.

After mixing the abrasive particles, thermosetting resin, heat resistance increase, lubricant, and pigment of the Laid-Open Patent Publication No. 10-2017-0140501 No. 10-2017-0140501 to make an abrasive resin, the mixed resin is injected into a mold in which the shape of the abrasive tip is formed, and then the resin It aims to thermoset the molded base cloth,

In addition, the resin, abrasive particles, and fillers of Patent Registration No. 10-1941083 are blended in a predetermined volume ratio, and the blend is separated and cured through screen printing, so that it is suitable for fine surface treatment ( An abrasive formed to have weight, elasticity, size, etc.) and a manufacturing method thereof,

In addition, it is safe to use without damaging the skin even when it comes into contact with the skin, and there is no strain on the joints as the abrasive particles are properly contained so that hardness and flexibility are harmonized. An object of the present invention is to provide a urethane foam polishing pad capable of extending the lifespan and a method for manufacturing the same,

The abrasive pad mixed with the abrasive is provided to increase frictional efficiency, but it is not possible to increase only the frictional efficiency in a specific area of the thin plate glass where folding occurs, and the polishing of the bent surface of the main surface operated in an intaglio form is a conventional sponge type. There is a problem in that the efficiency of the polishing pad is lowered, so an improvement plan for this is required.

Document 1 Registered Patent Publication No. 10-1186531 (published on Oct. 8, 2012) Document 2 Laid-open Patent Publication No. 10-2017-0140501 (published on December 21, 2017) Document 3 Registered Patent Publication No. 10-1941083 (published on January 29, 2019) Document 4 Registered Patent Publication No. 10-1255523 (published on April 23, 2013)

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Accordingly, in the present invention, as devised to eliminate the above problems, the surface of the intaglio, embossed, and boundary surfaces generated through primary polishing of a thin plate glass that can be bent or folded in a folded area can be precisely polished. An abrasive sponge is provided to

The abrasive sponge is provided with brushes having several incision grooves in a portion that rubs against the surface so that various types of surface friction can be generated during polishing by mutual adjacent friction and surface properties to increase polishing efficiency,

The brush is provided with various types of cut surfaces to maximize the polishing efficiency during the polishing process, focusing on providing a polishing sponge dedicated to engraved or embossed polishing of the thin plate glass surface having a folding function. it will be completed

The present invention for achieving the above technical problem, as shown in Figs. 1 to 6, the intaglio, embossed, and interface remaining on the surface of the first polished state in the folded region of the thin glass is used in a precision polishing apparatus In the polishing sponge to be used, the abrasive sponge is provided so that a brush composed of several incision grooves is rubbed at a portion rubbed with the surface, and each brush is provided to obtain a uniform polishing surface by friction with the surface .

The abrasive sponge has a circular shape and a sponge body with a diameter within a range of 10 to 260 mm, and the height of the sponge body is provided within a range of 20 to 60 mm, and at the lower side of the sponge body, a grid-shaped incision groove is provided at intervals of 6 to 20 mm. and, the inner distance of the incision groove is provided within the range of 0.5 to 5 mm, the depth of the incision groove is provided within the range of 10 to 25 mm, and a cut hole with a diameter of 10 to 30 mm is provided in the center of the sponge body. and,

An epoxy type adhesive is applied to the upper surface of the sponge body and provided so as to be bonded to a connection plate on the upper side thereof;

The connection plate is provided with a circular body having a receiving groove in the center of the upper portion, the outer surface is preferably provided with several screw grooves,

The sponge body may be provided to include 200 to 500 parts by weight of cerium particles in 100 parts by weight of urethane,

Preferably, a vertical surface is provided on the outer surface of the brush in a square or circular shape,

In addition, the outer surface of the brush may be provided with a trapezoidal-shaped incision in which the upper side is narrow and the lower side is widened,

In addition, it is preferable that the outer surface of the brush is provided with an embossed cut surface at regular intervals from the top to the bottom,

In addition, the outer surface of the brush may be provided with an inclined surface having an intaglio inclined surface in the center of which the upper and lower intervals are the same,

On the outer surface of the brush, the distance between the upper and lower portions is constant, and the protruding surfaces of the sawtooth shape are symmetrical to each other in the center therebetween.

Preferably, the brush is provided so that the surface polishing step of the thin glass can be precisely polished within a range of ±2 mm,

Preferably, the polishing sponge is provided so that friction can be achieved within the range of 60 to 70 HW based on the Shore C hardness scale when rubbed against the primary polished surface in the folded region of the thin glass,

The abrasive sponge is fastened to the rotating shaft of the polishing apparatus in a state where the connection plate and the adhesive are bonded, and it is preferable to be provided with a distortion prevention means to minimize distortion damage and deformation caused by forward and reverse rotational force,

The distortion preventing means is provided with several through-holes in the receiving groove of the connecting plate in a circular direction, and is provided with a vertical guide shaft rod that is inserted into the through-hole and moves up and down, and has a locking circular jaw on the upper side thereof, The vertical guide shaft is provided to penetrate the adhesive downward, and the sponge body of the abrasive sponge bonded by the adhesive is inserted into the guide hole and adjusted by the vertical guide shaft according to the stress transmitted to the sponge body. .

As described above, the polishing sponge for intaglio or embossed polishing of the thin plate glass surface having the folding function of the present invention as described above,

There is an advantage in that it is possible to obtain precise polishing quality of the surface of the thin plate glass by having a polishing sponge that can precisely polish the intaglio, embossed or inclined surface of the surface of the thin plate glass to which the folding function is given,

The lower portion of the abrasive sponge is provided with a brush having an incision groove, respectively, so that the sponge body of the abrasive sponge is fastened to the rotating shaft of the polishing device, so that it can be used without damage due to distortion even in forward and reverse rotation to prolong the lifespan There are advantages to

In addition, there is an advantage that the surface friction of the brushes provided independently by the incision grooves in the lower part of the sponge body can obtain an individual polishing effect,

In addition, it has a sponge body in the form of urethane and is made of urethane material to match the fine height difference of the surface of the thin glass, so that the pressure of the brush works evenly, so it can be applied to various surfaces and used.

In particular, there is an advantage that precise polishing can be easily achieved through counter friction by applying engraved, embossed, or inclined surfaces at the same time.

1 is an exemplary view showing an embodiment in which the polishing sponge of the present invention is applied and used in a polishing apparatus;
Figure 2 is an exploded assembly view of the abrasive sponge of the present invention;
Figure 3 is a side cross-section and bottom view of the polishing sponge of the present invention
4 to 5 are exemplary views showing an application embodiment of the brush of the present invention
6 is an exemplary side cross-sectional view showing the distortion prevention means of the present invention.

As shown in Figs. 1 to 6, the polishing sponge for intaglio or embossed polishing of the surface of the thin plate glass having a folding function of the present invention is shown in Figs.

Precision polishing of the intaglio (G-3), embossed (G-2) and interface (G-4) remaining on the surface (G-1) of the primary polished state in the folded area of the thin glass (G) In the abrasive sponge (1) used in the apparatus (A),

1 to 3, the polishing sponge 1 is

A brush 120 composed of several incision grooves 110 is provided to rub against the surface G-1 and the rubbing portion,

Each of the brushes 120 is provided to obtain a uniform polishing surface G-5 by friction with the surface G-1.

As shown in FIG. 3, the polishing sponge 1 is

In a circular shape, the diameter (D) is provided with the sponge body 101 within the range of 10 to 260 mm, the height (H) of the sponge body 101 is provided within the range of 20 to 60 mm,

On the lower side of the sponge body 101, a grid-shaped incision groove 110 is provided at intervals of 6 to 20 mm (S),

The inner distance D1 of the incision groove 110 is provided within the range of 0.5 to 5 mm,

The depth (H1) of the incision groove 110 is provided within the range of 10 to 25 mm,

In the center of the sponge body 101, the incision hole 109 having a diameter of 10 to 30 mm (D2) is provided;

An epoxy type adhesive 140 is applied to the upper surface of the sponge body 101 to be bonded to the connection plate 130 on the upper side thereof;

The connection plate 130 is provided with a circular body 132 having a receiving groove 133 in the center of the upper portion, the outer surface is provided with several screw grooves 135,

The sponge body 101,

It may be provided to include 200 to 500 parts by weight of cerium particles in 100 parts by weight of urethane,

As shown in (a) of Figure 4, the outer surface of the brush 120 may be provided with a vertical surface 110-1 in the form of a square or circular shape,

As shown in (b) of Figure 4, the outer surface of the brush 120 may be provided with a trapezoidal incision surface 110-2 in which the upper side is narrow and the lower side is widened,

As shown in (c) of Figure 4, the outer surface of the brush 120 may be provided with an embossed cut-out surface 110-3 at regular intervals from the top to the bottom,

As shown in (d) of FIG. 5, the upper and lower intervals are the same on the outer surface of the brush 120, and an inclined surface 110-4 having an intaglio inclined surface 110-4a may be provided in the center therebetween. ,

As shown in (e) of FIG. 5, the distance between the upper and lower portions is constant on the outer surface of the brush 120, and the protruding surfaces 110-5a of the sawtooth shape are provided so as to be symmetrical to each other in the center therebetween. It is preferable that the protruding surfaces (110-5a) are provided to be engaged when rubbed against each other,

The brush 120 may be provided such that the polishing step of the surface (G-1) of the thin glass (G) can be precisely polished within the range of ±2mm,

The abrasive sponge 1 is provided so that friction can be made within the range of 60 to 70 HW based on the Shore C hardness scale when rubbed against the surface G-1 polished first in the folded region of the thin glass G This is preferable,

As shown in FIG. 6 , the abrasive sponge 1 is fastened to the rotating shaft rod of the polishing apparatus A in a state where the connection plate 130 and the adhesive 140 are bonded to each other and is twisted by forward and reverse rotational force. It is preferable that the distortion prevention means 200 be provided to minimize damage and deformation,

The distortion preventing means 200 is provided with several through-holes 138 in the receiving groove 133 of the connection plate 130 in a circular direction,

A vertical guide shaft rod 220 that is inserted into the through hole 138 and moves up and down is provided, and a locking circular jaw 210 is provided on the upper side thereof,

The vertical guide shaft rod 220 is provided to penetrate the adhesive 140 to the lower side thereof,

In the sponge body 101 of the abrasive sponge 1 bonded by the adhesive 140, the vertical guide shaft rod 220 is inserted into the guide hole 108 according to the stress transmitted to the sponge body 101. provided to be adjusted.

Hereinafter, based on the drawings of the polishing sponge dedicated to engraving or embossed polishing of the surface of the thin plate glass having a folding function of the present invention, it will be described in more detail as follows.

In general, cerium is a soft and ductile silver-gray metal with a melting point of 795°C and a boiling point of 3443°C.

In addition, cerium easily burns at 150°C to form a pale yellow cerium oxide known as ceria (CeO2) and reacts easily with water. , so that cerium hydroxide and hydrogen gas can be easily produced.

In particular, it is used as a substitute for other metal oxides in processes for producing high-quality optical surfaces.

The present invention is an intaglio surface (G-3), an embossed surface (G) remaining on the surface (G-1) of the thin glass (G) in a state of primary polishing in the folded region as shown in FIGS. 1 to 6 -2) and the foreign material formed at the interface (G-4), using a polishing sponge (1) mixed with urethane and cerium, with a hardness within the range of 60 to 70 HW based on the Shore C hardness scale, precision by polishing device (A) Works to polish gently,

2 to 3, the abrasive sponge 1 has a circular shape and a diameter D within a range of 10 to 260 mm to provide a sponge body 101 to polish various thin glass sheets (G). and

The height (H) of the sponge body 101 is provided within the range of 20 to 60 mm to improve the durability and polishing efficiency of the sponge body 1 when it is rotated forward and reverse at a constant speed through the polishing device A. It works to maximize and polish,

On the lower side of the sponge body 101, a grid-shaped incision groove 110 is provided at intervals of 6 to 20 mm (S), the depth (H1) of the incision groove 110 is 10 to 25 mm, and the inner distance (D1) is provided within the range of 0.5 to 5 mm and operates to maximize the elasticity and polishing efficiency of each of several brushes 120 by each incision groove 110,

In the center of the sponge body 101, an incision hole 109 having a diameter of 10 to 30 mm (D2) is provided to prevent unnecessary friction to obtain a uniform polishing surface (G-5) of the surface (G-1). works so that

On the upper surface of the sponge body 101, an epoxy resin type adhesive 140 having a buffer function is applied, and a receiving groove ( 133) provided with a circular body 132, the outer surface of which is provided to be bonded with the connection plate 130 having several screw grooves 135 to facilitate the use and replacement of the abrasive sponge (1). make it possible,

5 to 6, a vertical surface 110-1 is formed on the outer surface of the brush 120 in a square or circular shape,

In addition, the upper side is narrow and the lower side is widened trapezoidal incision surface 110-2,

In addition, the cut surface 110-3 of the embossed form at regular intervals from the top to the bottom,

In addition, the upper and lower intervals are the same, and the inclined surface 110-4 having an intaglio inclined surface 110-4a in the center therebetween,

In addition, the distance between the upper and lower parts is constant, and the protrusion surfaces 110-5a of the sawtooth shape are provided so as to be symmetrical to each other in the center therebetween. Operates to increase the frictional efficiency with the surface (G-1) of the thin glass (G) provided with

As shown in Figure 1, the brush 120 operates so that the surface (G-1) polishing step (P) of the thin glass (G) can be precisely polished within the range of ±2mm,

As shown in FIG. 6, the polishing sponge 1 is bonded by the connecting plate 130 and the adhesive 140,

It is fastened to the rotary shaft rod of the polishing device (A) and provided with a warping prevention means 200 to minimize warping damage and deformation caused by forward and reverse rotational force. ) to prevent damage to

The twist preventing means 200 is provided with several through-holes 138 in the receiving groove 133 of the connection plate 130 in a circular direction, and is inserted into the through-holes 138 to guide the vertical guide shaft rod up and down. 220 is provided with a locking circular jaw 210 to be caught and fixed, and the sponge body 101 is inserted into the guide hole 108 so that the position is adjusted in response to the internal push generated by internal friction while the shaft sealing function is normally It works to prevent distortion.

A: Polishing device D, D2: Diameter
D1: Distance G: Laminate Glass
G-1: Surface G-3: Engraved surface
G-2: double face G-4: interface
G-5: Polishing surface H: Height
H1: Depth S: Gap
1: abrasive sponge 110: incision groove
120: brush 101: sponge body
110: incision groove 108: guide hole
109: cut hole 110-1: vertical plane
110-2: cut surface 110-3: cut surface
110-4a: concave inclined surface 110-4: inclined surface
110-5a: protruding surface 120: brush
130: connection plate 133: receiving groove
132: body 135: screw groove
138: through hole 140: adhesive
200: twist preventing means 220: vertical guide shaft bar
210: jamming circular jaw 220: vertical guide shaft bar

Claims (12)

Precision polishing of the intaglio (G-3), embossed (G-2) and interface (G-4) remaining on the surface (G-1) of the primary polished state in the folded area of the thin glass (G) In the abrasive sponge (1) used in the apparatus (A),

The abrasive sponge 1 is provided such that a brush 120 composed of several incision grooves 110 is rubbed on a portion rubbed with the surface G-1, and each brush 120 is a surface G-1 ) to obtain a uniform polishing surface (G-5) by friction with

The abrasive sponge (1) is provided with a sponge body 101 in a circular shape and a diameter (D) within the range of 10 to 260 mm, the height (H) of the sponge body 101 is provided within the range of 20 to 60 mm, , the lower side of the sponge body 101 is provided with a grid-shaped incision grooves 110 at intervals of 6 to 20 mm (S), and the inner distance (D1) of the incision grooves 110 is provided within the range of 0.5 to 5 mm. And, the depth (H1) of the incision groove 110 is provided within the range of 10 to 25 mm, and the center of the sponge body 101 is provided with an incision hole 109 having a diameter of 10 to 30 mm (D2),

An epoxy type adhesive 140 is applied to the upper surface of the sponge body 101 to be bonded to the connection plate 130 on the upper side thereof;

The connection plate 130 is provided with a circular body 132 having a receiving groove 133 in the upper center, but on the outer surface of the thin plate glass having a folding function, characterized in that provided with several screw grooves 135. Abrasive sponge for engraved or embossed polishing of the surface According to claim 1,
The sponge body 101,
Polishing sponge for engraved or embossed polishing of the thin plate glass surface having a folding function, characterized in that it contains 200 to 500 parts by weight of cerium particles in 100 parts by weight of urethane According to claim 1,
On the outer surface of the brush 120,
Abrasive sponge for engraved or embossed polishing of a thin plate glass surface having a folding function, characterized in that it has a vertical surface 110-1 in a square or circular shape According to claim 1,
On the outer surface of the brush 120,
Abrasive sponge for intaglio or embossed polishing of the thin plate glass surface having a folding function, characterized in that the upper side is narrow and the lower side has a trapezoidal incision surface 110-2 that is widened According to claim 1,
On the outer surface of the brush 120,
Abrasive sponge for engraved or embossed polishing of the thin plate glass surface having a folding function, characterized in that it has an embossed cut-out surface (110-3) at regular intervals from the top to the bottom According to claim 1,
On the outer surface of the brush 120,
An abrasive sponge for engraved or embossed polishing of a thin plate glass surface having a folding function, characterized in that the upper and lower portions are the same and the center has an inclined surface 110-4 having an intaglio inclined surface 110-4a in the center. According to claim 1,
On the outer surface of the brush 120,
The spacing between the upper and lower portions is constant, and the protrusion surfaces 110-5a of the sawtooth shape are provided to be symmetrical to each other in the center therebetween, and the respective projection surfaces 110-5a are provided to be engaged when rubbed against each other. Polishing sponge for engraved or embossed polishing of thin glass surface with folding function According to claim 1,
The brush 120 is
Polishing sponge for intaglio or embossed polishing of the surface of the thin plate glass (G) having a folding function, characterized in that the polishing step of the surface (G-1) of the thin plate glass (G) is provided so that precision polishing can be made within the range of ±2 mm According to claim 1,
The abrasive sponge (1),
When rubbing against the surface (G-1) polished first in the folded area of the thin glass (G), a folding function characterized in that it is provided so that friction can be made within the range of 60 to 70 HW based on the Shore C hardness scale. Polishing sponge for engraved or embossed polishing of thin glass surface with According to claim 1,
The abrasive sponge (1),
In the state bonded by the connection plate 130 and the adhesive 140,
Intaglio or embossing on the surface of a thin plate glass having a folding function, characterized in that it is fastened to the rotary shaft rod of the polishing device (A) and provided with a warping prevention means 200 to minimize warping damage and deformation caused by forward and reverse rotational force Abrasive sponge for polishing 11. The method of claim 10,
The distortion preventing means 200,
A number of through-holes 138 are provided in the receiving groove 133 of the connection plate 130 in a circular direction,
A vertical guide shaft rod 220 that is inserted into the through hole 138 and moves up and down is provided, and a locking circular jaw 210 is provided on the upper side thereof,
The vertical guide shaft rod 220 is provided to penetrate the adhesive 140 to the lower side thereof,
In the sponge body 101 of the abrasive sponge 1 bonded by the adhesive 140, the vertical guide shaft rod 220 is inserted into the guide hole 108 according to the stress transmitted to the sponge body 101. Abrasive sponge for engraved or embossed polishing of thin glass surface with folding function, characterized in that it is adjustable







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