JPH09132421A - Glass tube cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass tube cutter capable of smoothly and surely disconnecting glass tubes after imparting cutting scores thereto and ensuring the conduction of good cutting work. SOLUTION: This glass tube cutter has a cutting score imparting mechanism 10 which presses a cutting blade 13 to the glass tube G formed by tubing thereby imparting the score to be the origin for cuttging and a revolving roller 11 which is installed forward in the progressing direction of the glass tube G formed by tubing and imparts bending force on the glass tube G provided with the cutting score by this cutting score imparting mechanism 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass tube cutting device for cutting a glass tube to be drawn.

[0002]

2. Description of the Related Art In continuous production of glass tubes,
Production by the Dunner method is known. In the Danner method, ribbon-shaped molten glass is supplied to the outer peripheral surface of a rotating sleeve whose tip is inclined downward, and while the glass material is being wound by the rotation of the sleeve, air is blown from the rear end of the sleeve and several tenths from the sleeve. m The glass tube is drawn by pulling at a constant speed with a tube puller installed in front of the tube, and the glass tube is continuously produced by cutting it with a cutting device installed in front of the tube puller. There is.

In a conventional cutting device, a cutting blade containing water is brought into contact with a glass tube which is still in a high temperature state, a cutting scratch which serves as a cutting origin is made in the glass tube, and a crack is derived from the cutting scratch by thermal shock. A chill cut method is employed in which the glass tube is cut by doing so. Therefore,
After the glass tube is cut and cracked, thermal shock causes cracks to be generated all around the glass tube, and the glass tube is separated by a downward bending force due to its own weight as the glass tube advances. The separated glass tube falls on a conveyor that is installed below and is conveyed to the next step.

[0004]

However, in the conventional cutting apparatus, especially when the thickness of the glass tube to be drawn is large, the cracks after the cutting scratches are generated are delayed, so that the glass tube is not produced. Is not separated at the desired separation position,
There is a case where it does not drop on the transport conveyor, or it continues to proceed without being separated at all. In any case, since the glass tube is continuously drawn, if such cutting delay or uncutting occurs, there is a problem that it may cause confusion with the succeeding glass tube or the cutting work cannot be performed. Occurs. Further, if the amount of water supplied to the cutting blade is increased more than necessary, excessive cracks will be generated in the glass tube at the time of imparting cutting scratches, resulting in breakage of the cutting.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to cut a glass tube without difficulty after the glass tube is cut and scratched.
An object of the present invention is to provide a glass tube cutting device capable of performing excellent cutting work.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems and objects, and a cutting scratch imparting mechanism for making a scratch that becomes a cutting origin by bringing a cutting blade into contact with a glass tube to be drawn. And a rotating roller which is installed in front of the glass tube to be drawn in the traveling direction and which applies a bending force to the glass tube that has been cut and cut by the cut and scratch imparting mechanism. It is a cutting device.

[0007]

[Function] The cutting blade containing water of the cutting scratch imparting mechanism is brought into contact with the planned cutting site of the glass tube to be drawn, and a cutting scratch serving as a cutting origin is made, and the glass tube is cut before the desired cutting position. The tip of the roller comes into contact with the outer peripheral surface of the rotating roller, and the rotating roller applies a bending force to the glass tube to separate the glass tube from the site to be cut.

[0008]

EXAMPLES The glass tube cutting device of the present invention will be described below based on examples.

FIG. 1 is a schematic explanatory view of a glass tube cutting device according to the present invention.

Reference numeral 10 is a cutting scratch imparting mechanism, 11 is a rotating roller, 12 is a conveyor, and G is a glass tube.

The cutting scratch imparting mechanism 10 comprises a cutting blade 13, a rotary arm 14, a rotary shaft 15, a cam 16 and a cam roller 17.

The cutting blade 13 is attached to the tip of a rotary arm 14, and the rotary arm 14 is attached to a vertical rotary shaft 15 so as to be vertically swingable. The rotating shaft 15 is rotatably supported by a bearing, and is configured to be rotationally driven by a driving mechanism (not shown) at a constant rotating speed related to the drawing speed of the glass tube G. A certain amount of water is supplied to the cutting blade 13 by a water supply pipe that is piped through the rotary shaft 15 and the rotary arm 14. Rotating arm 14
Is rotated by the cam 16 while the rotating shaft 15 is rotating.
It swings up and down through 7, and when it descends, the cutting blade 13 comes into contact with the glass tube G so that a cutting scratch is made.

The rotating roller 11 has a width of 100 mm and a diameter of 2
It is composed of an iron roller of 00 mm, and a Kevlar cloth is attached to the outer peripheral surface with which the tip of the glass tube G abuts. The rotating roller 11 is installed in front of the direction of travel of the glass tube G to be drawn. Specifically, a bearing is attached to the tips of the two support arms 19, 19 whose rear ends are pivotally supported by the base 18. The rotation roller 11 is rotatably supported via the base 18 and the support arms 19, 19
And the spring 20 which is a biasing member capable of retracting the rotating roller 11 upward by abutting the glass tube G, and the rotation center shaft 11 'of the rotating roller 11 is connected to the glass tube G. In the state where it is located above the pipe pulling height,
The supporting arms 19, 19 are suspended and supported by inclining downward from one end to the other end. In addition, the air cylinder, the guide rail, etc. are attached to the base 18, and the entire X-axis and Y-axis are attached.
You may make it the structure which can be moved and adjusted to an axial direction and a Z-axis direction. Further, in this embodiment, an air ejector 21 is installed behind the rotary roller 11 as a rotating means for positively rotating the rotary roller 11 in the traveling direction of the glass tube G, and air is rotated by the rotary roller 11. The outer peripheral surface above the central axis 11 'is sprayed. The air injector 21 is provided with a pipe for supplying air from an air supply source through a control valve. The rotating roller 11 is arranged such that the glass tube G in which the cutting scratch P has been inserted exceeds the intended separating position, that is, the glass tube G is placed on the conveyor 12 provided between the cutting scratch imparting mechanism 10 and the rotating roller 11. It is placed at the limit position where can be dropped.

The conveyor 12 is a double-sided endless belt 2.
Attachment 23 for holding glass tube G on 2, 22
Are provided at equal intervals, and the falling glass tubes G are received between the attachments 23 and conveyed to the next step.

The operation of the cutting device will be described below.

The cutting scratch imparting mechanism 10 rotates at a constant rotation speed related to the drawing speed of the glass tube G, and the cutting blade 13 containing water hits the planned cutting site of the glass tube G to be drawn. The cutting scratches P that come into contact with each other and serve as cutting origins are inserted. A crack due to a thermal shock is generated on the entire circumference of the glass tube G and a downward bending force due to its own weight due to the progress of the glass tube G acts, but the cutting of the glass tube G in which the cutting scratch P is put is delayed. In the case where the glass tube G is dropped, that is, when the glass tube G is not separated even at the limit position on the conveyor 12 after falling, the tip of the glass tube G is moved by the movement of the glass tube G.
Abuts the outer peripheral surface of. Since the rotation center axis 11 ′ of the rotating roller 11 is located above the drawing height of the glass tube G and is constantly rotated in the traveling direction of the glass tube G by the air of the air injector 21, While relaxing the impact on the glass tube G, the glass tube G is dipped below the rotating roller 11 to apply a downward force to the glass tube G to give a bending force. Further, since the rotation roller 17 is suspended and supported between the base 18 and the support arms 19 and 19 via the springs 20 and 20, the rotation roller 17 retreats upward due to the contact with the glass tube G. No excessive bending force is applied to G. In this way, the glass tube G is separated from the planned cutting site with the cut P by applying the bending force by the rotating roller 11 in addition to the bending force by the weight of the glass tube G. . The separated glass tube G falls to a fixed position on the conveyor 12 and is conveyed to the next step.

The present invention is not limited to the above-described embodiment. For example, the rotating roller may be a motor as the rotating means, may be freely rotated without using the rotating means, or may be an urging member. It is also possible to fix it at a fixed position without going through. Also, the direction of the bending force applied to the glass tube is not limited to the downward direction.

[0018]

As described above, according to the glass tube cutting apparatus of the present invention, a glass tube having a cutting scratch provided by the cutting scratch imparting mechanism can be comfortably moved by the rotating roller at the desired cutting position. The effect is that it can be reliably cut off, and good cutting work can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a glass tube cutting device according to the present invention.

[Explanation of symbols]

 10 Cutting Scratching Mechanism 11 Rotating Roller 12 Conveyor 13 Cutting Blade 14 Rotating Arm 15 Rotating Shaft 16 Cam 17 Cam Roller 18 Base 19 Support Arm 20 Spring 21 Air Injector 22 Endless Belt 23 Attachment

Claims (1)

[Claims] 1. A cutting scratch imparting mechanism for making a scratch that becomes a cutting origin by bringing a cutting blade into contact with a glass tube to be drawn, and a cutting scratch imparting mechanism installed in front of a traveling direction of the glass tube to be drawn. A glass tube cutting device, comprising: a rotating roller that applies a bending force to a glass tube that has been cut and scratched by a mechanism.