JP2015110511A - Method of manufacturing tube glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a tube glass using a tube glass manufacturing device having a tube drawing process of efficiently disposing a tube glass which has not been cut in a cutting process.SOLUTION: There is provided a method of manufacturing a tube glass G in which the tube glass G is obtained by cutting the tube glass G formed through tube drawing in a cutting process, and the method further includes a pulverization recovery process of pulverizing and recovering a tube glass G which could not be cut in the cutting process. The pulverization recovery process is carried out by using a pulverization device 11 having a rotating blade 13 inside. The pulverization device 11 is provided on a downstream side in a tube drawing direction of the tube glass G formed by tube drawing, and has a tube glass entrance 14 opposed right to the upstream side in the tube drawing direction, and the tube glass G which could not be cut in the cutting process is put into the pulverization device 11 from the tube glass entrance 14 and pulverized in the pulverization recovery process.

Description

  The present invention relates to a technology of a method for manufacturing a tube glass using a tube glass manufacturing apparatus having a tube drawing step.

  In general, a method of manufacturing a tube glass using a tube glass manufacturing apparatus having a tube drawing process is known (for example, see Patent Document 1). In the method for manufacturing tube glass shown in Patent Document 1, a glass supply step of supplying molten glass melted in a glass melting furnace to the sleeve surface, a forming step of forming the molten glass as a cylindrical continuous tube glass, and a tube A tube drawing step of continuously drawing glass by a tube drawing machine, and a cutting step of cutting the tube glass formed by tube drawing every predetermined length with a cutting machine. By comprising in this way, the tube glass of predetermined length can be manufactured continuously.

JP-A-48-93610

For the cutting of the tube glass in the cutting process, a cutter is generally used, and the surface of the continuously drawn tube glass is scratched with a cutter and is cut by applying a thermal shock to the cutter scratch. In the cutting process, in order to process the cut surface of the tube glass into a flat surface, it is necessary to cut by applying a small thermal shock to the part damaged by the cutter. In some cases, the tube glass could not be cut at the power points.
In this case, it was necessary to temporarily stop the tube drawing process and start the tube drawing step again after discarding the uncut tube glass.

  Then, in view of the subject which concerns, this invention provides the manufacturing method of the tube glass which can dispose of the tube glass which was not cut | disconnected in a cutting process efficiently.

  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 invention according to claim 1 is a method for producing a tube glass by obtaining a tube glass by cutting the tube glass formed by tube drawing in the cutting step, and pulverizing the tube glass that could not be cut in the cutting step. The present invention further relates to a method for manufacturing a tube glass, further comprising a pulverizing and collecting step of collecting.

  The invention according to claim 2 relates to a method for manufacturing a tube glass, wherein the pulverization and recovery step is performed using a pulverizer equipped with blades rotating inside.

  According to a third aspect of the present invention, the crushing device is provided on the downstream side of the tube glass formed in the tube drawing direction, and the crushing device has a tube glass inlet facing the upstream side in the tube drawing direction. And, in the crushing and collecting step, the glass tube that could not be cut in the cutting step is put into the crushing device from the tube glass inlet and crushed.

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

  That is, according to the invention described in claim 1, even if the tube glass cannot be cut, it is not necessary to temporarily stop the tube drawing step, and the production efficiency can be increased.

  According to the second aspect of the present invention, since the tube glass can be continuously pulverized by the rotating blades, the tube glass that could not be cut in the cutting step can be disposed of efficiently.

  According to the invention described in claim 3, since the tube glass inlet of the crushing device faces the tube drawing direction, the tube glass that could not be cut in the cutting process can be reliably put into the crushing device, It can be disposed of efficiently.

The side view which shows the tube glass manufacturing apparatus with which the manufacturing method of the tube glass which concerns on embodiment of this invention is implemented. The side view which similarly shows the downstream part of a tube glass manufacturing apparatus. The top view which similarly shows the downstream part of a tube glass manufacturing apparatus. The side view which shows the grinding | pulverization apparatus which concerns on another embodiment of this invention.

  Next, embodiments of the invention will be described.

First, a tube glass manufacturing apparatus 10 in which the method for manufacturing a tube glass according to the present embodiment will be described with reference to FIGS. 1 to 3.
1 and 2 are side views of the tube glass manufacturing apparatus 10. FIG. 3 is a plan view of the tube glass manufacturing apparatus 10.
The arrow direction shown in FIG. 1 is defined as the downstream side (front side), and the direction opposite to the arrow is defined as the upstream rear side.

A tube glass manufacturing apparatus 10 according to the present embodiment is a dunner type tube drawing apparatus using a sleeve, and includes a glass melting furnace 1, a sleeve 2, a sleeve driving device 3 that rotationally drives the sleeve 2, and a muffle that stores the sleeve 2. It has a furnace 4, a traveling path 5, a conveyance roller 6, a tube drawing machine 7, a cutting machine 8, a conveyor 9, a crushing device 11, and the like.
The tube glass G is formed by supplying the molten glass melted in the glass melting furnace 1 to the sleeve 2 and extending the molten glass from the tip of the sleeve 2 using the tube drawing machine 7.

  The glass melting furnace 1 is a furnace for melting a glass raw material, and the molten glass melted in the glass melting furnace 1 is supplied to the sleeve 2 in the muffle furnace 4.

The sleeve 2 is made of a refractory formed in a cylindrical shape, and the tip end portion 2a is formed in a tapered shape whose diameter decreases toward the tip end side. The sleeve 2 is rotated to wind the molten glass supplied to the sleeve 2 in the muffle furnace 4 so as to be formed into a cylindrical shape.
Here, the sleeve 2 is disposed so as to be inclined downward toward the distal end portion 2 a and is connected to the shaft 21 of the sleeve driving device 3. The shaft 21 is inserted from the proximal end portion 2b of the sleeve 2 to the distal end portion 2a.
The sleeve 2 having such a configuration is stored in the muffle furnace 4.

The muffle furnace 4 is provided on the downstream side of the glass melting furnace 1, and a molten glass supply port 4 </ b> A for allowing the molten glass supplied from the glass melting furnace 1 to flow in is provided.
The molten glass supply port 4A is arranged at a position where the molten glass can flow down to the sleeve 2. In the present embodiment, the molten glass supply port 4A is provided directly above the base end portion 2b of the sleeve 2. ing.
In addition, a tube glass discharge port 4B is provided on the downstream side of the muffle furnace 4, and a sleeve opening 4C is provided on the upstream side of the muffle furnace 4.

The travel path 5 is provided on the downstream side of the muffle furnace 4.
The traveling path 5 is covered with a box-shaped cover whose bottom surface is open.

The conveyance roller 6 is provided on the downstream side of the traveling path 5 and the traveling path 5, and transports the tube glass G to the downstream side while supporting the tube glass G from below.
A plurality of conveying rollers 6 provided on the downstream side of the traveling path 5 are arranged in the horizontal direction at equal intervals.

The tube drawing machine 7 is provided on the downstream side of the traveling path 5, pulls the tube glass G fed out from the traveling path 5 at a constant speed, and feeds it toward the cutting machine 8.
The tube drawing machine 7 has endless belts arranged at the top and bottom, and the tube glass G is moved by sandwiching the upper and lower surfaces of the tube glass G by the upper and lower belts and towing and guiding them in the downstream direction.

The cutting machine 8 cuts the tube glass G sent out from the tube drawing machine 7 every fixed length.
The cutting machine 8 has the same configuration as that of the prior art. Specifically, the cutting machine 8 is a hammer-shaped member having a cutter with a sharp tip, and is configured to be movable in the vertical direction. The tube glass G is cut by applying a thermal shock.
The tube glass G cut by the cutting machine 8 is conveyed to the next process by the conveyor 9.

  The crushing device 11 is a device that crushes and collects the tube glass G that could not be cut by the cutting machine 8, and is disposed downstream in the direction in which the tube glass G is towed and guided by the tube drawing machine 7. It is provided downstream from the machine 8.

  As shown in FIGS. 2 and 3, the crushing device 11 is provided on a box-shaped cover member 12, a blade 13 provided inside the cover member 12 and configured to be rotatable, and a surface of the cover member 12. A tube glass inlet 14 and an anti-scattering member 15 attached to the outside of the tube glass inlet 14.

The cover member 12 has a box shape and is installed on the ground.
A part of the bottom surface of the cover member 12 is opened, and a groove 16 and a conveyor 17 disposed in the groove 16 are provided below the opened part.

The blade | wing 13 is a member for grind | pulverizing the tube glass G, and is provided with the rotating shaft 13a in the center.
Here, the rotation shaft 13a is disposed so that the axial direction is parallel to the ground and is orthogonal to the direction in which the tube glass G is towed and guided. The rotation shaft 13a is connected to a power source such as a motor (not shown) and is configured to be continuously rotatable by power from the power source.
As shown in FIG. 2, the blade 13 rotates so as to move downward from above on the tube glass inlet 14 side (see the arrow direction in FIG. 2).

The tube glass inlet 14 is a circular hole provided on one surface of the cover member 12, and in the present embodiment, is provided on the wall surface 12 a facing the upstream side of the cover member 12 in the tube drawing direction.
In addition, the dimension of the tube glass inlet 14 is formed so that it can enter into the inside of the crushing apparatus 11 even when the tube glass G is bent.

The scattering prevention member 15 is provided around the tube glass inlet 14, and is provided so as to protrude toward the outside of the cover member 12.
Further, the scattering prevention member 15 is configured in a truncated cone shape, and is configured such that its cross-sectional diameter increases toward the outside of the cover member 12.

Next, the manufacturing process of the tube glass G using the tube glass manufacturing apparatus 10 is demonstrated using FIG. 1 thru | or FIG.
First, as shown in FIG. 1, molten glass G melted in the glass melting furnace 1 is supplied to the sleeve 2 in the muffle furnace 4.
Next, the molten glass supplied to the muffle furnace 4 is wound around the rotating sleeve 2 to form a cylindrical shape. At this time, blown air is ejected from the tip of a hole (not shown) formed in the shaft 21 so that the molten glass is formed as a cylindrical continuous tube glass G.
Next, the tip of the molded tube glass G is continuously drawn into the tube drawing machine 7. When the tube drawing process is started, the leading end of the tube glass G is guided to the tube drawing machine 7 by an operator or the like.
Next, the tube glass G formed by tube drawing is cut into predetermined lengths by a cutting machine 8 (cutting step). The tube glass G cut by the cutting machine 8 is conveyed to the next process by the conveyor 9.

In the cutting process, the cutting machine 8 cuts the portion of the tube glass G that has been scratched with a cutter by applying a slight thermal shock in order to flatten the cut surface.
Here, since the thermal shock which the cutting machine 8 gives to the tube glass G is small, the tube glass G may not be cut at a place to be cut from time to time in the cutting process.

  As shown in FIGS. 2 and 3, the tube glass G that could not be cut by the cutting machine 8 in the cutting process moves to the downstream side in the tube drawing direction from the tube glass inlet 14 of the crushing device 11 to the inside of the crushing device 11. enter. The tube glass G that has entered the inside of the crushing device 11 is crushed by coming into contact with the blades 13 rotating from the upper side to the lower side and falls into the grooves 16. The crushed pieces generated when the tube glass G is pulverized by coming into contact with the blades 13 are hardly scattered by the scattering preventing member 15.

  The crushed tube glass G is stored in a storage container (not shown) by a conveyor 17 disposed in the groove 16 and melted again in the glass melting furnace 1.

Thus, the provision of the pulverization and recovery step eliminates the need to stop the tube drawing step.
That is, since the blades 13 of the crushing device 11 are always rotating, the tube glass G that could not be cut in the cutting process is continuously crushed by the crushing device 11. During this time, if the cutting in the cutting process is normally performed, the cut tube glass G is sent to the conveyor 9 and conveyed to the next process.
Thereby, it is possible to save the trouble of stopping the pipe drawing process and restarting the pipe drawing process, and the manufacturing process of the tube glass G can be performed efficiently.

In the present embodiment, the rotation shaft 13a of the blade 13 is arranged so that the axial direction is parallel to the ground and is orthogonal to the direction in which the tube glass G is towed and guided. However, the present invention is not limited to this. For example, the rotation shaft 13a is arranged so as to be parallel to the direction in which the tube glass G is guided to be pulled, and the tube glass G is guided in the tow. It is also possible to dispose it in the left-right direction with respect to the position.
In this case, the blade | wing 13 is set as the structure rotated so that it may move below from upper direction in the side by which the tube glass G is tow-guided.

As mentioned above, this invention is a manufacturing method of the tube glass G which obtains the tube glass G by cut | disconnecting the tube glass G continuously drawn and formed by the cutting process, Comprising: It further has a crushing and collecting step of crushing and collecting G.
By comprising in this way, even if the tube glass G cannot be cut | disconnected by a cutting process, it becomes unnecessary to stop a pipe drawing process and can improve production efficiency.

Further, the crushing and collecting step is performed using a crushing device 11 having blades 13 that rotate inside.
By comprising in this way, since the tube glass G can be continuously grind | pulverized by the rotating blade | wing 13, the tube glass G which could not be cut | disconnected in a cutting process can be disposed of efficiently.

Further, the crushing device 11 is provided on the downstream side in the tube drawing direction of the tube glass G that has been drawn, and the crushing device 11 includes a tube glass inlet 14 that faces the upstream side in the tube drawing direction. , The tube glass G that could not be cut in the cutting step is put into the crushing device 11 from the tube glass inlet 14 and crushed.
By comprising in this way, since the tube glass inlet 14 has faced the tube drawing direction, the tube glass G which could not be cut | disconnected in a cutting process can be reliably put into the grinding | pulverization apparatus 11, and it disposes efficiently. be able to.

Next, a pulverizing apparatus 111 according to another embodiment will be described with reference to FIG.
FIG. 4 is a side view of the crushing device 111.

The crushing device 111 in the present embodiment is a crushing device for preventing the crushed glass from scattering and collecting glass dust generated when the glass is crushed efficiently.
In addition, the crushing device 111 is arrange | positioned in the position corresponding to the crushing device 11 in the tube glass manufacturing apparatus 10 shown in FIG.

  The crushing device 111 is a device for crushing and collecting the tube glass G that could not be cut by the cutting machine 8, and in the direction in which the tube glass G is towed and guided by the tube drawing machine 7 (see FIG. 1). It is provided downstream of 8.

  The crushing device 111 includes a box-shaped cover member 112, a blade 113 provided rotatably inside the cover member 112, a tube glass inlet 114 provided on one surface of the cover member 112, and an outside of the tube glass inlet 114. A guide member 115 attached to the guide member 115, an auxiliary cover member 116 provided between the guide member 115 and the cover member 112, a scattering prevention member 117 provided between the auxiliary cover member 116 and the cover member 112, A discharge passage 118 for discharging the crushed glass.

The cover member 112 has a box shape and is installed on the ground.
A discharge passage 118 is inserted in the middle in the vertical direction of the cover member 112, and the glass crushed inside the cover member 112 is configured to fall into the discharge passage 118.
On the upper surface of the cover member 112, a dust collection hole 112b connected to a dust collection unit (not shown) that collects fine glass dust is provided.

The blades 113 are members for pulverizing the tube glass G.
The blades 113 are arranged so that the central axis is in a direction parallel to the ground and is orthogonal to the direction in which the tube glass G is pulled.
The blade 113 is connected to a power source such as a motor (not shown) and is configured to be continuously rotatable by power from the power source.
And the blade | wing 113 is rotating so that it may move to the downward | lower direction from the upper direction in the tube glass entrance 114 side (refer arrow direction of FIG. 4).

  The tube glass inlet 114 is a circular hole provided on one surface of the cover member 112. In the present embodiment, the tube glass inlet 114 is provided on the wall surface 112a facing the upstream side of the cover member 112 in the tube drawing direction.

The guide member 115 is provided on the upstream side of the tube glass inlet 114 in the tube drawing direction. More specifically, the guide member 115 projects toward the outside of the auxiliary cover member 116 provided on the upstream side of the cover member 112 in the tube drawing direction. Is provided.
The guide member 115 is configured in a truncated cone shape, and is configured such that its cross-sectional diameter increases toward the outside of the auxiliary cover member 116.
The cross-sectional diameter of the innermost end (downstream in the tube drawing direction) of the guide member 115 is configured to be approximately the same as the diameter of the tube glass G.
Therefore, even when the tip of the tube glass G is guided vertically or horizontally with respect to the innermost cross section of the guide member 115, the tip of the tube glass G slides on the inner surface of the guide member 115 while guiding the guide member 115. Is guided to the innermost cross section.

The auxiliary cover member 116 is a member for preventing the dust of the crushed tube glass G from being scattered, and is attached to the upper portion of the wall surface 112 a of the cover member 112.
The auxiliary cover member 116 has a tube glass inlet 116b on a wall surface 116a that faces the upstream side in the tube drawing direction, and a guide member 115 is provided around the tube glass inlet 116b.
In addition, a dust collection hole 116c connected to a dust collection unit (not shown) that collects fine glass dust is provided on the upper surface of the auxiliary cover member 116.
Furthermore, the lower surface of the auxiliary cover member 116 is inclined downward and downstream in the tube drawing direction.

A scattering prevention member 117 is provided at the tube glass inlet 114.
The anti-scattering member 117 is configured in a smaller truncated cone shape than the guide member 115, and is configured such that its cross-sectional diameter increases toward the upstream side in the tube drawing direction.
Further, the end of the scattering prevention member 117 on the downstream side in the tube drawing direction is disposed near the blade 113, and the cross-sectional diameter of the end on the downstream side in the tube drawing direction is substantially the same as the diameter of the tube glass G. It is comprised so that it may become.

The discharge passage 118 is a member for discharging the crushed glass to the outside of the cover member 112, and is disposed inside the cover member 112.
The discharge passage 118 is inclined downward downstream in the pipe drawing direction, the upstream end is in contact with the lower end of the auxiliary cover member 116, and the lower surface of the auxiliary cover member 116 and the inner surface of the discharge passage 118 are surfaces. It is continuous to become one.

Next, the pulverization and recovery step of pulverizing and collecting the tube glass G that could not be cut in the cutting step using the pulverizer 111 will be described.
The tube glass G that could not be cut by the cutting machine 8 in the cutting step moves downstream in the tube drawing direction, and enters the inside of the cover member 112 from the tube glass inlet 114 of the crushing device 111.
The tube glass G that has entered the inside of the cover member 112 is crushed by coming into contact with the blades 113 that rotate from the upper side to the lower side, and falls into the discharge passage 118.

The end of the scattering prevention member 117 on the downstream side in the tube drawing direction is disposed at a position close to the blade 113, and the cross-sectional diameter of the end on the downstream side in the tube drawing direction is approximately the same as the diameter of the tube glass G. Therefore, the position of the downstream end of the tube glass G is continuously guided to the blades 113 by the end of the anti-scattering member 117 on the downstream side in the tube drawing direction without changing up and down and left and right.
Thereby, it can grind | pulverize to a substantially uniform magnitude | size without the grinding | pulverization nonuniformity of the tube glass G. FIG.

The crushed pieces generated when the glass tube G is crushed by contacting the blades 113 are less likely to be scattered by the scattering preventing member 117 toward the auxiliary cover member 116 in the pulverizing apparatus 111.
Further, fine glass dust scattered when the tube glass G is crushed is sent from the dust collection hole 112b of the cover member 112 to a dust collection unit (not shown).
Here, the cross-sectional diameter of the end portion of the scattering prevention member 117 on the downstream side in the tube drawing direction is configured to be approximately the same as the diameter of the tube glass G, so that the crushed glass and fine glass dust are in the tube. The rate of movement upstream in the pulling direction can be reduced.

Of the glass crushed by the blades 113, the glass splashed upstream in the tube drawing direction collides with the inner surface of the auxiliary cover member 116 and the guide member 115, and is sent from the lower surface of the auxiliary cover member 116 to the discharge passage 118. It is done.
Thereby, also about the glass which bounced to the upstream of the pipe drawing direction, it can discharge | emit, preventing scattering.

  Of the fine glass dust that scatters when pulverizing the tube glass G, glass dust that leaks to the upstream side in the tube drawing direction of the anti-scattering member 117 is collected through a dust collection hole 116c of the auxiliary cover member 116. Sent to the department.

  The crushed tube glass is stored in a storage container (not shown) through the discharge passage 118 and melted again in the glass melting furnace 1.

Thus, the provision of the pulverization and recovery step eliminates the need to stop the tube drawing step.
That is, since the blades 113 of the crushing device 111 are constantly rotating, the tube glass G that could not be cut in the cutting process is continuously crushed by the crushing device 111.
During this time, if the cutting in the cutting process is normally performed, the cut tube glass G is sent to the conveyor 9 and conveyed to the next process.
Thereby, it is possible to save the trouble of stopping the pipe drawing process and restarting the pipe drawing process, and the manufacturing process of the tube glass G can be performed efficiently.

  Thus, the crushing device 111 according to the present embodiment can prevent the crushed glass from scattering and can efficiently collect the glass dust generated when the glass is crushed.

DESCRIPTION OF SYMBOLS 1 Glass melting furnace 2 Sleeve 3 Sleeve drive device 4 Muffle furnace 5 Traveling path 6 Conveyance roller 7 Pipe drawing machine 8 Cutting machine 10 Tube glass manufacturing apparatus 11 Crushing apparatus 12 Cover member 13 Blade 14 Tube glass inlet 15 Scattering prevention member 111 Crushing apparatus 112 Cover member 113 Blade 114 Tube glass inlet 115 Guide member 116 Auxiliary cover member 117 Spattering prevention member

Claims (3)

A tube glass manufacturing method for obtaining a tube glass by cutting the tube glass formed by a tube drawing in a cutting step,
A method for producing a tube glass, further comprising a crushing and collecting step of crushing and collecting the tube glass that could not be cut in the cutting step.   The said pulverization collection process is performed using the pulverization apparatus provided with the blade | wing rotated inside, The manufacturing method of the tube glass of Claim 1 characterized by the above-mentioned. The crusher is provided on the downstream side of the tube glass formed in the tube drawing direction,
The crushing device includes a tube glass inlet facing the upstream side in the tube drawing direction,
3. The method for producing a tube glass according to claim 2, wherein in the crushing and collecting step, the tube glass that could not be cut in the cutting step is pulverized by being put into the crushing device from the tube glass inlet.

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