JPH0710578A - Apparatus for production of flaky glass - Google Patents

Abstract

PURPOSE:To solve problems, such as partial flawing of a transfer roll and nonuniform sol transfer to an endless belt connecting the top end of a driving wheel and the top end of a tension wheel, by arranging a supporting member in such a manner as to receive the belt above the intrinsic path line of the belt and to impart tension to this belt. CONSTITUTION:This apparatus is provided with the transfer roll 1 which receives the supply of the sol dispersed with colloidal particles of a component for forming glass in a dispersion medium in a sol receiving part 1a and temporarily holds the sol on its surface, freely contactably with the surface of the endless steel belt 4 put across the driving wheel 2 and the tension wheel 3 in such a manner that the sol can be transferred to the surface of the belt. In addition, the steel belt 4 connecting the top end of the driving wheel 2 on the top end of the tension wheel 3 is received above its intrinsic path line and the tension is applied on the belt 4. The sol transferred by the transfer roll 1 is gelatinized by passing a heating and drying furnace 6 disposed on the downstream side thereof. The gel is recovered as flaky glass in a recovering section 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing glass flakes by the sol-gel method.

[0002]

2. Description of the Related Art In a conventional flake-shaped glass manufacturing apparatus, as shown in FIG. 5, a sol containing a colloidal particle of a glass forming component dispersed in a dispersion medium is supplied to a sol receiver 1a.
Transfer roll 1 for receiving the sol and temporarily holding the sol on the surface
However, the sol is provided so as to be capable of contacting with the surface of the endless belt 4 which is stretched over the drive wheel 2 and the tension wheel 3 so that the sol can be transferred. The belt 4 is formed by, for example, slitting a wide and long stainless steel thin plate material into a desired width and cutting the stainless steel thin plate cut into a predetermined length around the wheels 2 and 3 and then welding both ends thereof. It is composed of endless belts that are joined together. Then, a surface plate 51 as a supporting member A for receiving and supporting the contact portion of the belt 4 with the transfer roll 1 from the back surface thereof,
The upper surface (that is, the surface that receives the back surface of the abutting portion) is provided so as to coincide with the original pass line of the belt 4 that connects the upper ends of the drive wheels 2 and the tension wheels 3. Further, a heating and drying oven 6 for gelating the sol transferred by the transfer roll 1 into a glass body by inserting the belt 4 is arranged on the lower side of the transfer roll 1 and formed on the belt 4. A recovery unit 7 for separating and recovering the glass body into flakes is provided on the outlet side of the heating and drying furnace 6.

[0003]

In such a conventional apparatus, the belt 4 is a stainless steel thin plate obtained by slitting a wide and long stainless steel thin plate material into a desired width and cutting it into a predetermined length. Since it is composed of endless belts that are wound around both wheels 2 and 3 and welded at both ends, when the stainless steel sheet is slitted or when the stainless steel sheet is attached to both wheels 2 and 3. Based on the mechanical strain that occurs when the belt 4 is passed around the belt, the thermal stress strain that occurs when the belt 4 passes through the heating and drying furnace 6, etc., both edge portions of the belt 4 are closer to the transfer roll 1 side than other portions. A warp deformation (see FIG. 6) that causes a deviation to (4) occurs. Then, based on the occurrence of the warp deformation, the edge portion of the belt 4 comes into contact with the transfer roll 1 more strongly than the other portion (hereinafter, referred to as excessive contact portion), and the other portion is transferred. Since a phenomenon of not contacting the roll 1 (hereinafter, referred to as non-contacting portion) occurs, a portion corresponding to the edge portion of the transfer roll 1 is damaged due to the generation of the excessive contact portion. In some cases, the sol transfer to the surface of the belt 4 becomes non-uniform due to the occurrence of the non-contact portion. Therefore, as a measure for avoiding the occurrence of these problems, that is, as a measure for suppressing the occurrence of warp deformation in the belt 4, slitting of the stainless steel thin plate material is performed at a specific portion of the thin plate material (for example, the occurrence of warp is compared. The central part that seems to be scarce)
Or by applying the tension to the belt 4 by wrapping the stainless steel thin plate around the wheels 2 and 3 and joining both ends thereof to apply tension to the belt 4. It is considered to apply heat treatment,
All of these measures are very expensive (the former measures increase the cost because most of the stainless steel sheet material must be discarded, and the latter measures
However, it is not practical because it requires large-scale equipment and costs are high.
The present invention has been made by paying attention to such an actual situation, and it is an object of the present invention to provide a means capable of solving the conventional problems caused by the warp deformation of the belt as described above at low cost. Has an aim.

[0004]

The flake-shaped glass manufacturing apparatus according to the present invention (hereinafter referred to as the apparatus of the present invention) is characterized by supplying a sol in which colloidal particles of a glass forming component are dispersed in a dispersion medium. A transfer roll that receives and temporarily holds the sol on the surface is provided so that the sol can be transferred to the surface of the endless belt that is laid across the drive wheel and the tension wheel, and the belt, The portion contacted with the transfer roll is provided with a support member that receives and supports from the back surface thereof, and the sol transferred by the transfer roll is
A heating / drying furnace for gelling a glass body by inserting the belt is disposed on the lower side of the transfer roll, and the heating unit is provided to separate and collect the glass body formed on the belt into flakes. A flake-shaped glass manufacturing apparatus provided on the outlet side of a drying furnace, which receives tension above the original path line of the belt connecting the upper end of the drive wheel and the upper end of the tension wheel to the belt. The point is that the support member is arranged at the position to be applied.

[0005]

In the device of the present invention having the above characteristic structure,
Since the arrangement of the supporting member is set at a position for receiving the tension above the original pass line and applying tension to the belt, even if the warp deformation occurs or is about to occur in the belt. The tension applied to the belt acts so as to correct or suppress the warp deformation. As a result, the occurrence of the excessive abutment portion and the occurrence of the non-abutment portion will be suppressed to a small extent,
Therefore, the conventional problem caused by the generation of the excessive contact portion or the non-contact portion, that is, the conventional problem that a part of the transfer roll is damaged or the sol transfer to the belt becomes uneven is solved. Become so. Moreover, in order to solve the above problem, it is sufficient to simply dispose the supporting member above the original pass line, and the cost for that is that the slitting of the conventional stainless steel thin plate material is performed by the thin plate material. This is extremely trivial as compared with the cost when limited to a specific location, the cost when heat treatment for removing stress is applied to a belt in a tensioned state, and the like.

[0006]

As described above, according to the present invention, the conventional problems that a part of the transfer roll is damaged and the sol transfer to the belt becomes uneven can be solved at low cost. The object of the present invention is achieved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the portions denoted by the same reference numerals as the conventional example indicate the same or corresponding portions.

FIG. 1 and FIG. 2 show an embodiment of the device of the present invention. In the device of the present invention, a sol in which colloidal particles of a glass forming component are dispersed in a dispersion medium is supplied. The transfer roll 1 that receives the sol at the sol receiving portion 1a and temporarily holds the sol on the surface can transfer the sol to the surface of the endless steel belt 4 that is stretched over the drive wheel 2 and the tension wheel 3. It is provided so that it can be contacted freely (see FIG. 1). The steel belt 4 is, specifically,
A wide and long stainless steel thin plate is slitted to a desired width and cut into a predetermined length. A stainless steel thin plate is wrapped around the wheels 2 and 3 and both ends are welded to each other. Has been done. Then, a support roll 5 as a supporting member A that receives and supports the contact portion of the steel belt 4 with the transfer roll 1 from the back surface thereof drives its upper surface (that is, the surface that receives the back surface of the contact portion). It is provided at a position where it is received above the original pass line of the steel belt 4 connecting the upper end of the wheel 2 and the upper end of the tension wheel 3 to apply tension to the steel belt 4 (see FIG. 2). . Further, the sol transferred by the transfer roll 1 is transferred to the steel belt 4
Heating and drying furnace 6 for gelling into glass by inserting
Is provided on the lower side of the transfer roll 1, and further, a recovery section 7 for separating and recovering the glass body formed on the steel belt 4 into flakes is provided at the outlet side of the heating and drying furnace 6. (See FIG. 1).

As the glass-forming component, an organometallic compound (basically any compound can be used as long as it can be hydrolyzed and dehydrated and condensed, but a metal alkoxide having an alkoxyl group is preferable), and more specifically Specifically,
Methoxides such as silicon, titanium, aluminum, zirconium, phosphorus and boron, ethoxides, propoxides, butoxides and the like are used alone or as a mixture. Thus, the composition of the resulting flake-shaped glass is, for example, pure silica, silicate-based, titanate-based, aluminate-based, zirconate-based, phosphate-based, borate-based amorphous. Or it is crystalline. The dispersion medium for dispersing the organometallic compound may be basically anything as long as it can substantially disperse the organometallic compound, but methanol, ethanol, propanol,
Most preferred are alcohols such as butanol. The amount of the dispersion medium used is 0.1 to 0.995, preferably 0.2 to 0.9 by volume ratio with respect to the total amount of the organometallic compound and the dispersion medium.
0.9, and more preferably 0.2 to 0.85. Further, in FIG. 1, a is a carrier roller, 10 is a return roller, and 11 is a cooling device.

In the device of the present invention having such a configuration,
Since the support member A is placed above the original pass line to apply a tension to the steel belt 4, the steel belt 4 is warped and deformed (that is, the thin stainless steel plate slips). Steel based on mechanical strain that occurs when the stainless steel thin plate is wound around the wheels 2 and 3, and thermal stress strain that occurs when the steel belt 4 passes through the heating and drying furnace 6 and the like. A warp deformation in which both edge portions of the belt 4 are displaced toward the transfer roll 1 side compared to other portions)
Even if the occurrence of or is about to occur, the tension applied to the steel belt 4 acts to correct or suppress the warp deformation. In addition, FIG.
The state before the tension is applied is shown in FIG.
The state after the said tension is given is shown. As a result, based on the occurrence of the warp deformation, the edge portion of the steel belt 4 comes into contact with the transfer roll 1 more strongly than other portions (that is, the occurrence of the excessive contact portion), and It is possible to suppress the phenomenon in which the portion of (1) does not come into contact with the transfer roll 1 (that is, the generation of the non-contact portion), which is caused by the generation of the excessive contact portion or the non-contact portion. The conventional problem, that is, the conventional problem that a part of the transfer roll 1 is damaged or the sol transfer to the steel belt 4 becomes uneven, can be solved. In addition, in order to solve the above problem, it is sufficient to simply dispose the supporting member A above the original pass line, and the cost therefor is that the slitting of the conventional stainless steel thin plate material is performed. The cost is extremely trivial compared to the cost of performing the heat treatment for limiting the stress to the specific location and the cost of performing the heat treatment for removing stress on the steel belt 4 in the tensioned state.

Next, another embodiment will be described. The supporting member A may be composed of a supporting plate 8 as shown in FIG. 4, instead of being composed of the supporting roll 5.

The present invention can be applied even when an endless belt made of a metal such as aluminum or a plastic such as vinyl chloride or polyethylene is used instead of the steel belt 4.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of the device of the present invention.

FIG. 2 is a perspective view showing the main part thereof.

FIG. 3 is an explanatory view of the operation of the device of the present invention.

FIG. 4 is a perspective view showing another embodiment of the device of the present invention.

FIG. 5 is a side view showing the overall configuration of a conventional device.

FIG. 6 is an explanatory diagram of problems in the conventional device.

[Explanation of symbols]

 1 Transfer Roll 2 Drive Wheel 3 Tension Wheel 4 Belt 6 Heating / Drying Furnace 7 Recovery Section A Supporting Member

Claims (1)

[Claims] 1. A transfer roll (1), which receives a sol in which colloidal particles of a glass forming component are dispersed in a dispersion medium and temporarily holds the sol on the surface thereof, a drive wheel (2) and a tension wheel ( 3) provided on the surface of an endless belt (4) laid over and so as to be capable of abutting so as to transfer the sol, and abutted on the transfer roll (1) by the belt (4). A heating and drying furnace (6) is provided in which a supporting member (A) for receiving and supporting the portion from the back surface thereof is provided, and the sol transferred by the transfer roll (1) is gelated into a glass body by inserting the belt (4). ) Is disposed on the lower side of the transfer roll (1), and a recovery unit (7) for separating and recovering the glass body formed on the belt (4) into flakes is provided in the heating / drying furnace (6). ) Flake glass manufacturing equipment installed on the exit side of The tension is applied to the belt (4) by being received above the original pass line of the belt (4) connecting the upper end of the drive wheel (2) and the upper end of the tension wheel (3). position,
A flake-shaped glass manufacturing apparatus in which the support member (A) is arranged.