JP2015171753A - Plate glass polishing device and plate glass polishing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate glass polishing device which prevents deterioration of the polishing capability as much as possible and recovers polishing slurry S after polishing to reuse the polishing slurry S, and to provide a plate glass polishing method.SOLUTION: A plate glass polishing device includes: transfer means 10 which transfers plate glass G to which polishing slurry S composed of an abrasive compound and water adheres; an air nozzle 21 and a washing nozzle 22 which respectively jet compression air a and washing water w to the plate glass G transferred by the transfer means 10; and a shoot 31 which is disposed below the transfer means 10 and receives the polishing slurry S removed from the plate glass G by the compression air a and the washing water w jetted to the plate glass G. The air nozzle 21 and the washing nozzle 22 are disposed so that a compression air jetting position of the air nozzle 21 is located at the upstream side relative to a washing water jetting position of the washing nozzle 22 in a transfer direction. The shoot 31 is formed so as to recover the polishing slurry S dividing the slurry S into a regeneration polishing slurry Sa having high concentration of the abrasive compound and a waste polishing slurry Sb having low concentration of the abrasive compound.

Description

  The present invention relates to a technology of a plate glass polishing apparatus and a plate glass polishing method for polishing plate glass using a polishing slurry containing an abrasive, and more specifically, a plate glass polishing apparatus and a plate glass for recovering and reusing a polishing slurry after polishing. The present invention relates to a polishing method technique.

Conventionally, in the polishing of plate glass, for example, a polishing slurry obtained by mixing granular abrasives called abrasive grains and water is used.
Specifically, polishing is performed while pressing the surface to be polished by a polishing means such as a polishing pad while supplying polishing slurry to the surface to be polished (surface to be polished) of the plate glass.
Thus, the polishing of the plate glass has been performed using the polishing slurry.

By the way, if the polishing slurry after the polishing of the plate glass remains on the surface to be processed, it may become a factor that causes scratches, dirt, etc. on the surface to be polished in the process performed after the polishing of the plate glass. Therefore, it is preferable to remove the used polishing slurry from the surface to be polished immediately after the polishing of the plate glass.
On the other hand, as the abrasive contained in the abrasive slurry, there are many expensive things such as cerium oxide and permis, and if the abrasive slurry is discarded only once, the cost of the abrasive is increased. Become.
Therefore, conventionally, after the polishing of the member to be polished (for example, plate glass), the used polishing slurry is immediately removed from the member to be polished, and the removed polishing slurry is recovered and reused. An apparatus is known (see, for example, “Patent Document 1”).

Here, as an example of a conventional polishing apparatus, a configuration of a plate glass polishing apparatus 100 (hereinafter referred to as “polishing apparatus 100” as appropriate) will be described with reference to FIG.
In the following description, for convenience, the vertical direction in FIG. 4 is described as the vertical direction of the polishing apparatus 100.
In FIG. 4, the direction of the arrow A is defined as the conveyance direction of the glass sheet G.

The polishing apparatus 100 includes a belt conveyor 101 that conveys the plate glass G in the horizontal direction, and a substantially rectangular box-shaped chute 102 that opens upward is disposed below the belt conveyor 101. Further, a cleaning nozzle 103 is disposed above the belt conveyor 101 and in the vicinity of the downstream end (the side indicated by the arrow A).
A polishing means (not shown) including a polishing slurry discharging device, a polishing pad, and the like is disposed above and upstream of the belt conveyor 101 (on the side opposite to the side indicated by the arrow A). The polishing surface (upper surface) of the plate glass G conveyed in a horizontal posture is polished by the polishing means.

The bottom surface 102a of the chute 102 is formed in an inverted quadrangular pyramid shape that gradually inclines downward toward the center, and a through hole 102b is drilled at the apex thereof.
In addition, one end of the piping member 105 is connected to the through hole 102 b, and the other end of the piping member 105 is connected to the recovery tank 104 positioned below the chute 102.
That is, the chute 102 communicates with the collection tank 104 via the piping member 105.

On the other hand, the cleaning nozzle 103 is disposed so as to extend in the horizontal direction and the width direction of the belt conveyor 101 (a direction orthogonal to the arrow A in a plan view). Further, at the lower end of the cleaning nozzle 103, a plurality of jet outlets 103a, 103a,... (Only one is shown because FIG. 4 is a side view) are straight along the extending direction of the cleaning nozzle 103. Has been placed.
Then, washing water (for example, room temperature water) w · w... Is ejected downward from the plurality of jet outlets 103a, 103a.

In the conventional polishing apparatus 100 configured as described above, the plate glass G conveyed in a horizontal posture by the belt conveyor 101 is disposed on the upper surface thereof by the above-described polishing means (not shown) on the upstream side of the belt conveyor 101. Be polished.
The plate glass G that has been polished by the polishing means is continuously conveyed in a horizontal posture by the belt conveyor 101. At this time, a part of the polishing slurry S after polishing is attached to the upper surface of the plate glass G without dropping from the plate glass G.
Thereafter, the washing water w is sprayed toward the upper surface of the sheet glass G that has reached the downstream end of the belt conveyor 101. Thereby, substantially all of the polished polishing slurry S adhered to the upper surface of the plate glass G is removed from the plate glass G.

The polished polishing slurry S removed from the upper surface of the plate glass G is mixed with the cleaning water w and falls onto the chute 102 and is collected in the collection tank 104 through the piping member 105.
Thereafter, the polishing slurry S recovered in the recovery tank 104 is sent to a polishing slurry discharge device or the like constituting the above-described polishing means (not shown) and reused.

JP 2003-68684 A

As described above, even in a conventional plate glass polishing apparatus, after polishing of a member to be polished (for example, plate glass), the polished polishing slurry is immediately removed from the member to be polished and the removed polishing slurry is removed. Can be recovered and reused.
Here, the polished polishing slurry contains glass pieces removed from the plate glass by polishing, and in order to reuse the recovered polishing slurry, it is necessary to remove the glass pieces.
However, in the conventional plate glass polishing apparatus, when the polishing slurry after polishing is removed from the member to be polished, a large amount of cleaning water is mixed with the polishing slurry, so that it is recovered by removing the glass piece. Even if it becomes possible to recycle the polishing slurry, the slurry concentration (ratio of the abrasive in the polishing slurry) has decreased, and the polishing ability of the polishing slurry (a unit amount of polishing slurry per unit time) However, there is a problem that the amount of polishing removed from the member to be polished decreases in a short time.

  The present invention has been made in view of the above-described current problems, and a plate glass polishing apparatus and a plate glass polishing method capable of collecting a polishing slurry after polishing while preventing a decrease in polishing ability as much as possible. It is an issue to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, the plate glass polishing apparatus according to claim 1 of the present invention is a plate glass polishing apparatus that polishes plate glass using a polishing slurry comprising an abrasive and water, and collects and reuses the polishing slurry after polishing. A conveying means for conveying the plate glass to which the polishing slurry is adhered, an air nozzle for ejecting compressed air to the plate glass conveyed by the conveying means, and a washing water for the plate glass conveyed by the conveying means. A cleaning nozzle that ejects the air, and a chute that is disposed below the conveying means and that receives and collects the polishing slurry removed from the plate glass by the compressed air and the cleaning water sprayed to the plate glass. The nozzle and the cleaning nozzle have a compressed air ejection position of the air nozzle, and a cleaning water ejection of the cleaning nozzle. The chute is arranged so as to be recovered into a regenerated polishing slurry having a high concentration of the abrasive and a waste slurry having a low concentration of the abrasive. It is characterized by being made.

  Moreover, the polishing apparatus of the plate glass which concerns on Claim 2 of this invention is a downward direction between the arrangement position of the said air nozzle in the said conveyance direction and the arrangement position of a washing nozzle, and a water stop board is in the said chute | shoot. The chute is partitioned by the water stop plate into an upstream space in the transport direction from the water stop plate and a downstream space in the transport direction from the water stop plate. It is characterized by.

  In the plate glass polishing apparatus according to claim 3 of the present invention, the transport unit is a belt conveyor, and the cleaning nozzle is disposed in the vicinity of the downstream end of the transport unit. .

  On the other hand, the plate glass polishing method according to claim 4 of the present invention is a plate glass polishing method in which a plate glass is polished using a polishing slurry comprising an abrasive and water, and the polished polishing slurry is recovered and reused. A removing step of removing the polishing slurry from the plate glass by ejecting compressed air and washing water to the plate glass being conveyed by the conveying step; A recovery step of separating and recovering the polishing slurry removed in the removal step into a recycled polishing slurry having a high concentration of the abrasive and a waste polishing slurry having a low concentration of the abrasive, and in the removal step, compressed air Is ejected upstream of the cleaning water in the transport process.

  As effects of the present invention, the following effects can be obtained.

That is, according to the plate glass polishing apparatus according to claim 1 of the present invention, the polished polishing slurry blown off by the compressed air is recovered in the received chute by separating it into a recycled polishing slurry and a discarded polishing slurry. . Therefore, even if the recovered recycled polishing slurry is used again, it is possible to prevent the polishing ability from being lowered.
In addition, most of the polished slurry after polishing is blown off by the compressed air on the upstream side in the transport direction, so that the cleaning nozzle that is jetted downstream in the transport direction with respect to the air nozzle blows off the remaining polishing slurry. Therefore, it is possible to greatly reduce the amount of used cleaning water and the amount of drainage, and to protect the environment.

  According to the flat glass polishing apparatus of the second aspect of the present invention, the chute is isolated by the water stop plate provided between the air nozzle arrangement position and the cleaning nozzle arrangement position in the conveyance direction in the chute. Thus, the recovered polishing slurry can be recovered upstream of the water stop plate, and the waste polishing slurry can be recovered downstream of the water stop plate.

  According to the plate glass polishing apparatus of the third aspect of the present invention, for example, a part of the plate glass removed by polishing is mixed in the used polishing slurry mixed with the washing water, which is blocked by the water stop plate. Even so, a part of the plate glass can be reliably removed through the filter, and only the used polishing slurry can be guided to the discharge port.

  According to the method for polishing plate glass according to claim 4 of the present invention, the polished polishing slurry is recovered by being divided into a regenerated polishing slurry and a discarded polishing slurry. Therefore, even if the recovered recycled polishing slurry is used again, it is possible to prevent the polishing ability from being lowered.

The partial cross section side view which showed the whole structure of the plate glass grinding | polishing apparatus which concerns on one Embodiment of this invention. The top view which showed the whole structure of the plate glass grinding | polishing apparatus which concerns on one Embodiment of this invention. It is the figure which showed the whole structure of the plate glass grinding | polishing apparatus which concerns on one Embodiment of this invention, Comprising: The top view seen from the direction of the arrow X in FIG. The partial cross section side view which showed the whole structure of the conventional plate glass grinding | polishing apparatus.

[Plate glass polishing apparatus 1]
Next, the overall configuration of a plate glass polishing apparatus 1 (hereinafter simply referred to as “polishing apparatus 1”) that embodies the present invention will be described with reference to FIGS.
In the following description, for convenience, the vertical direction in FIG. 1 is described as the vertical direction of the polishing apparatus 1.
Moreover, in FIG. 1 thru | or FIG. 3, the direction of the arrow A is prescribed | regulated and described as the conveyance direction of the plate glass G. FIG.

The polishing apparatus 1 in this embodiment is an apparatus for polishing the plate surface of the plate glass G using, for example, a polishing slurry S in which an abrasive such as cerium oxide and water are mixed. Further, the polishing apparatus 1 is an apparatus that collects the polished polishing slurry S while preventing a reduction in polishing ability, and can reuse the recovered polishing slurry S.
As shown in FIG. 1, the polishing apparatus 1 is mainly composed of a conveying means 10, a removing means 20, a collecting means 30, and the like.

The conveyance means 10 is for conveying the plate glass G continuously, and performs the conveyance process of the plate glass G.
For example, in the present embodiment, the transport unit 10 is configured by a belt conveyor 11 that can transport the glass sheet G in the horizontal direction.

Above the belt conveyor 11, on the upstream side in the conveying direction of the plate glass G (on the side opposite to the side indicated by the arrow A), a polishing means (not shown) including a polishing slurry S discharging device, a polishing pad, and the like is arranged. And the grinding | polishing means which grind | polishes the plate glass G is comprised.
In addition, above the belt conveyor 11, a removing means 20 described later is disposed on the downstream side in the transport direction (the side indicated by the arrow A), and the surface to be polished of the plate glass G (the upper surface in the present embodiment). It is comprised so that the polishing slurry S after grinding | polishing adhering to may be removed.

  And the belt conveyor 11 conveys continuously the plate glass G grind | polished by the grinding | polishing means from the upstream side toward the downstream side where the removal means 20 is arrange | positioned (more specifically, the direction of arrow A). .

  In addition, about the structure of the conveyance means 10, it is not limited to the belt conveyor 11 like this embodiment, For example, the plate glass G of a horizontal attitude | position like a pushing device like a roller conveyor or a feeder, Any configuration may be used as long as it can be conveyed in the horizontal direction.

Next, the removing unit 20 will be described.
The removal means 20 is for performing the removal process which removes the grinding | polishing polishing slurry S adhering to the surface of the plate glass G from the plate glass G. As shown in FIG.
The removing unit 20 includes an air nozzle 21 and a cleaning nozzle 22.

The air nozzle 21 is for ejecting compressed air a to the glass sheet G conveyed by the belt conveyor 11 and blowing off the polished polishing slurry S from the glass sheet G.
The air nozzle 21 extends above the belt conveyor 11 and extends in a direction perpendicular to the transport direction in plan view.

At the lower end of the air nozzle 21, a plurality (only one is shown because FIG. 1 is a side view) is formed in a straight line along the extending direction of the air nozzle 21. Has been placed.
The air nozzle 21 is connected with a compressor, a solenoid valve, and the like (not shown) through a piping member.

By having such a configuration, as shown in FIG. 2, for example, compressed air aa supplied from the compressor (not shown) to the air nozzle 21 is made up of a plurality of outlets 21a, 21a,. ... (Refer to FIG. 1), sprayed downward (more specifically, downward and slightly upstream) and sprayed over the entire width of the belt conveyor 11.
In other words, the plate glass G conveyed by the belt conveyor 11 is sprayed with the compressed air a ejected from the air nozzle 21 uniformly against the surface to be polished (upper surface).

As shown in FIG. 1, the cleaning nozzle 22 ejects cleaning water (for example, room temperature water) w onto the glass sheet G conveyed by the belt conveyor 11 and has not been able to be blown away by the compressed air a. The polishing slurry S is removed from the plate glass G.
The cleaning nozzle 22 extends in a direction perpendicular to the transport direction in plan view above the belt conveyor 11 and downstream of the sheet glass G in the transport direction (more specifically, downstream of the air nozzle 21). Arranged.

At the lower end of the cleaning nozzle 22, a plurality (only one is shown because FIG. 1 is a side view) is formed in a straight line along the extending direction of the cleaning nozzle 22. Has been placed.
The cleaning nozzle 22 is connected to a pump (not shown), a cleaning water storage tank, and the like via a piping member.

With such a configuration, as shown in FIG. 2, for example, the cleaning water w · w... Supplied from the pump (not shown) to the cleaning nozzle 22 is made up of a plurality of outlets 22a, 22a,. ... (Refer to FIG. 1), sprayed downward (more specifically, downward and slightly upstream) and sprayed over the entire width of the belt conveyor 11.
In other words, the plate glass G conveyed by the belt conveyor 11 is sprayed with compressed air a uniformly on the surface to be polished (upper surface), and then more uniformly on the surface to be polished (upper surface). The washing water w ejected from 22 is sprayed.

Next, the collection means 30 will be described.
The recovery means 30 is for executing a recovery process for recovering the polished polishing slurry S removed from the glass sheet G by the removing means 20 while preventing a reduction in polishing ability as much as possible.
As shown in FIG. 1, the collection unit 30 includes a chute 31, a collection tank 32, a waste tank 33, and the like.

The chute 31 receives and recovers the polishing slurry S blown off by the compressed air a and the cleaning water w by the removing means 20, and the high concentration polishing slurry S that hardly contains the cleaning water w among the recovered polishing slurry S. Is guided to the recovery tank 32, while the low-concentration polishing slurry S containing a large amount of washing water w is guided to the waste tank 33.
In other words, the chute 31 guides the polishing slurry S (hereinafter referred to as “regenerated polishing slurry Sa” as appropriate) that is blown off by the compressed air “a” with almost no decrease in polishing ability to the recovery tank 32, while the cleaning water w The removed polishing slurry S having a reduced polishing ability (hereinafter referred to as “discarded polishing slurry Sb” as appropriate) is guided to the waste tank 33.

The chute 31 is formed in a substantially rectangular box shape that opens upward, and is disposed immediately below the belt conveyor 11.
Specifically, as shown in FIG. 2, the size of the chute 31 in the width direction (perpendicular to the arrow A) in the plan view is compared with the size in the width direction of the plate glass G and the belt conveyor 11. , Is set to be larger.
The position of the upstream end of the chute 31 is equivalent to the position of the upstream end of the belt conveyor 11, while the position of the downstream end of the chute 31 is the position of the downstream end of the belt conveyor 11. Is set to be further downstream.
Note that the position of the downstream end of the chute 31 is set to be substantially the same as the position of the cleaning nozzle 22 of the removing means 20.

Thus, in plan view, the downstream end of the belt conveyor 11 is disposed so as to be located inside the opening of the chute 31.
As a result, the polishing slurry S blown off by the compressed air a or the cleaning water w by the removing means 20 falls into the opening of the chute 31 from both sides in the width direction of the belt conveyor 11 and the downstream end, and reliably It will be collected.

As shown in FIG. 1, the bottom surface 31a of the chute 31 is formed in an inverted quadrangular pyramid shape that gradually inclines downward toward the central portion, and a first discharge port 31b is perforated at the apex thereof.
In addition, one end of the first piping member 34 is connected to the first discharge port 31 b, and the other end of the first piping member 34 is connected to the recovery tank 32. That is, the chute 31 is communicated with the recovery tank 32 via the first piping member 34.

On the other hand, on the bottom surface 31 a of the chute 31, a second discharge port 31 c is perforated at the downstream side of the first discharge port 31 b and at the center in the width direction of the chute 31.
In addition, one end of the second piping member 36 is connected to the second discharge port 31 c, and the other end of the second piping member 36 is connected to the waste tank 33. That is, the chute 31 is in communication with the waste tank 33 via the second piping member 36.

As shown in FIG. 3, on the bottom surface 31 a of the chute 31, a water stop plate 35 made of a rectangular flat plate member is disposed between the first outlet 31 b and the second outlet 31 c in the width direction of the chute 31. Arranged throughout.
Thus, in the chute 31, the first discharge port 31b is provided on the upstream side of the water stop plate 35 in the conveying direction of the plate glass G, and the second discharge port 31c is the plate glass G of the water stop plate 35. Provided in the vicinity of the downstream side in the transport direction.
By having such a configuration, as will be described later, the regenerated polishing slurry Sa blown off by the compressed air a by the removing means 20 is guided to the recovery tank 32 through the first discharge port 31b, while the washing water w The waste polishing slurry Sb blown off by is guided to the waste tank 33 through the second discharge port 31c.

  The second discharge port 31c is covered with the filter 37. For example, even if a part of the plate glass G polished and removed is mixed in the waste polishing slurry Sb dammed by the water stop plate 35. A part of the plate glass G is reliably removed, and only the ground polishing slurry Sb after polishing is guided to the waste tank 33.

The recovery tank 32 is temporarily blown away by the compressed air a ejected by the removing means 20 and temporarily removes the polished polishing slurry S (more specifically, the regenerated polishing slurry Sa) removed from the plate glass G. It is for storing.
The collection tank 32 is disposed below the chute 31 and communicates with the chute 31 via the first piping member 34 as described above.

  The recovery tank 32 is a polishing slurry discharge device (not shown) disposed on the upstream side of the belt conveyor 11 described above via a piping device group (not shown) including, for example, a pump and a solenoid valve. The regenerated polishing slurry Sa stored in the recovery tank 32 can be reused.

The waste tank 33 is temporarily blown away by the washing water w ejected by the removing means 20 and temporarily removes the polished polishing slurry S (more specifically, the discarded polishing slurry Sb) removed from the plate glass G. It is for storing.
The waste tank 33 is disposed below the chute 31 and communicates with the chute 31 via the second piping member 36 as described above.

  The waste tank 33 is provided with a solenoid valve (not shown) and the like, and the waste polishing slurry Sb containing a large amount of the cleaning water w temporarily stored is removed from the polishing apparatus 1 through the solenoid valve. It has a configuration that can be appropriately discharged to the outside.

[Plate glass polishing method]
Next, the plate glass grinding | polishing method which concerns on this invention is demonstrated using FIG.
The plate glass polishing method embodied by the present embodiment is performed by the polishing apparatus 1.

  Specifically, in the polishing apparatus 1, the rectangular plate glass G polished by the polishing unit is placed in a horizontal posture by the belt conveyor 11 that is a conveying process, and is removed from the upstream side to the removing unit 20 that is a downstream removing process. The polishing slurry S that is continuously conveyed in the horizontal direction (more specifically, in the direction of arrow A) and removed in the removing step is collected by the chute 31 that is a collecting step.

  Here, in the polishing means, the polishing slurry S is supplied to the surface to be polished (upper surface) of the plate glass G, and a polishing pad (not shown) is used for the surface to be polished (upper surface) to which the polishing slurry S adheres. It is polished while pressing.

  Thereafter, the flat glass sheet G with the polished polishing slurry S attached to the surface to be polished (upper surface) is conveyed in the horizontal direction by the belt conveyor 11 which is a conveying process.

  In the removing step, the polished polishing slurry S remaining on the surface to be polished (upper surface) of the plate glass G is removed from the plate glass G by the compressed air a and the washing water w ejected from the removing means 20, and this is a recovery step. It is collected by the collecting means 30.

Here, in the recovery means 30, the water stop plate 35 is erected on the bottom surface 31 a of the chute 31 as described above.
The water stop plate 35 is located between the arrangement position of the air nozzle 21 and the arrangement position of the cleaning nozzle 22 in the conveyance direction of the glass sheet G of the chute 31 in plan view. Is a space upstream of the water stop plate 35 (hereinafter referred to as “upstream space”) and a space downstream of the water stop plate 35 (hereinafter “downstream space”). To be described).

  Then, the polishing slurry S (more specifically, the regenerated polishing slurry Sa) blown off by the compressed air a by the removing means 20 and falling into the upstream space of the chute 31 is centered along the inclination of the bottom surface 31a. Are collected to the first discharge port 31b and led to the recovery tank 32 through the first piping member 34.

Further, the polishing slurry S (more specifically, the discarded polishing slurry Sb) that has been removed by the washing water w by the removing means 20 and dropped into the downstream space of the chute 31 is guided to the first discharge port 31b. This is configured to be effectively dammed by the water stop plate 35.
That is, a large amount of cleaning water w is mixed in the waste polishing slurry Sb removed by the cleaning water w, but a lot of cleaning water w is mixed and the slurry concentration (ratio of the abrasive to the entire polishing slurry S) is increased. The structure is such that the polishing slurry S, which has been reduced and has reduced polishing ability, is effectively dammed by the water stop plate 35 from being guided to the recovery tank 32 through the first discharge port 31b.

  Then, the polishing slurry S containing the washing water w blocked by the water stop plate 35 is once collected to the waste tank 33 through the second piping member 36 and discharged to the outside of the polishing apparatus 1.

As described above, in the plate glass polishing method according to the present embodiment, the plate glass G is polished, the polished plate glass G is transferred by the transfer step, and the polishing is completed in the removal step located on the downstream side. The polished polishing slurry S that adheres to the upper surface of the plate glass G is blown off by the compressed air a and the cleaning water w by the removing means 20 and is recovered by the recovering means 30 that is a recovery process.
Further, the recovery means 30 guides the regenerated polishing slurry Sa into the upstream space of the chute 31, and the waste polishing slurry Sb is guided into the downstream space.

As a result, the regenerated polishing slurry Sa is once recovered in the recovery tank 32 and reused, while the discarded polishing slurry Sb is once recovered in the waste tank 33 and discharged outside the polishing apparatus 1.
That is, in the plate glass polishing method according to the present embodiment, the reclaimed polishing slurry Sa is preferentially collected by removing the discarded polishing slurry Sb accompanied by a decrease in the polishing capability as much as possible, thereby polishing while preventing the decrease in the polishing capability as much as possible. The subsequent polishing slurry S is collected, and the polishing slurry S is reused.

1 Polishing device (plate glass polishing device)
DESCRIPTION OF SYMBOLS 10 Conveying means 11 Belt conveyor 21 Air nozzle 22 Cleaning nozzle 31 Chute 31a Bottom surface (inclined surface)
31b First outlet 31c Second outlet 35 Water stop plate 37 Filter a Compressed air G Sheet glass S Polishing slurry Sa Regenerated polishing slurry Sb Waste polishing slurry w Washing water

Claims (4)

A plate glass polishing apparatus that polishes a sheet glass using a polishing slurry composed of an abrasive and water, collects and reuses the polishing slurry after polishing,
A conveying means for conveying the plate glass to which the polishing slurry is attached;
An air nozzle that ejects compressed air to the plate glass conveyed by the conveying means;
A cleaning nozzle that ejects cleaning water to the plate glass transported by the transporting means;
A polishing slurry that is disposed below the conveying means and receives and collects the polishing slurry removed from the plate glass by the compressed air and the washing water jetted to the plate glass, and
The air nozzle and the cleaning nozzle are respectively arranged so that the compressed air ejection position of the air nozzle is upstream of the cleaning water ejection position of the cleaning nozzle in the conveying direction of the plate glass,
The chute is configured to be recoverable into a regenerated polishing slurry having a high concentration of the abrasive and a waste slurry having a low concentration of the abrasive.
A flat glass polishing apparatus characterized by that. Below the position of the air nozzle and the position of the cleaning nozzle in the transport direction, and in the chute, a water stop plate is provided,
The chute is partitioned by the water stop plate into a space on the upstream side in the transport direction from the water stop plate and a space on the downstream side in the transport direction from the water stop plate.
The plate glass polishing apparatus according to claim 1, wherein: The conveying means is a belt conveyor,
The cleaning nozzle is disposed in the vicinity of the downstream end portion of the transport means.
The plate glass grinding | polishing apparatus of Claim 1 or Claim 2 characterized by the above-mentioned. A plate glass polishing method for polishing a plate glass using a polishing slurry consisting of an abrasive and water, and recovering and reusing the used polishing slurry,
A transporting process for transporting the glass sheet to which the polishing slurry is attached;
A removal step of removing the polishing slurry from the plate glass by ejecting compressed air and washing water to the plate glass being conveyed by the conveyance step;
A recovery step of separating and collecting the polishing slurry removed in the removal step into a recycled polishing slurry having a high concentration of the abrasive and a waste polishing slurry having a low concentration of the abrasive, and
In the removing step, the compressed air is ejected on the upstream side in the conveying step rather than the washing water.
A method for polishing plate glass.

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