JPS6029653B2 - Hanging type inorganic long fiber manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing inorganic long fibers, particularly glass long fibers, using wind power.

Conventionally, methods such as a drooping winding method have been used to form long glass fibers from molten glass, but recently methods using wind power have also been developed, such as in Tokusekki No. 52-96238. The methods involve hanging the glass in a trickle, introducing it into a nozzle jet, and then plunging it into a laminar gas flow to draw it into fibers, but these require complex equipment and are not easy to adjust.

Although the present invention uses wind power, the structure is completely different from the above-described method, and the above-mentioned drawbacks are improved.

That is, in the present invention, glass raw materials are melted in a melting furnace, and are made to hang down from a number of nozzles installed in series at the bottom of the furnace, and the hanging glass rivulet is passed through several stages installed in contact with the lower part of the melting furnace. In this method, the fibers are introduced into opposing air curtains, stretched by the wind force of these air curtains, and then cooled in air while being lowered to form long fibers.

The embodiment of the present invention will be described below with reference to the drawings of one embodiment.

In the drawings, reference numeral 1 denotes a glass melting furnace, in which glass raw materials (mainly soda-lime glass) are heated and melted to a viscosity suitable for sagging under its own weight.

Reference numeral 2 denotes a large number of nozzles installed at the bottom of the melting furnace, which are arranged in a straight line, have a diameter of several sizes, and are made of a refractory material such as zinter corso.

3 is a wind extension section installed in contact with the bottom of the melting furnace. Its horizontal cross section is approximately the same length as the inside of the furnace bottom, and the inside of the upper part is a few pieces, and the inside of the lower part is smaller than these. ing.

Its vertical cross section is wedge-shaped, and the entire body is a fan-flat rectangular cylindrical body, and is made of refractory material. 4,4'~11
, 11' are air pipes for generating air curtains, and three to eight air pipes are provided at approximately equal intervals on both longitudinal inner surfaces of the rectangular cylinder.

These pipes are provided with slits or multiple holes at the bottom, and each pipe is connected to a pressure source, with the lower the pressure, the higher the pressure, and the air curtain flow rate is several tens of meters/minute in the first stage, The speed of each stage is approximately a geometric series, with five stages of several thousand meters per minute. This is because the viscosity of the hanging glass stream increases rapidly when it exits the furnace, and the wind force to draw it must also increase rapidly. The glass rivulet is stretched by the downward stretching force of the air curtain, becomes fibers of several tens of microns, exits from the wind-stretching section, descends while being air-cooled, and is stored in a storage device such as a conveyor.

When producing felt or mat using the long fibers according to the present invention, the rectangular cylinder of the wind-stretching section is stirred by a fulcrum provided close to the bottom of the glass melting furnace, and the stretched glass fibers are received on a conveyor below. By doing this, felt or mat-like products can be easily obtained.

Since the present invention is a hanging type, the production volume per nozzle is much higher than that of a normal drum winding type, and since it is powered by wind, there is almost no cutting of fibers, which has the advantage of providing a good working environment. This is a suitable method for efficiently producing long fibers.

Example 1 A window glass shoulder made of soda-lime glass was heated to a temperature of 1600 to 1650 q0 in a melting furnace of 80 liters in the furnace, and its viscosity was set to 1.25 to 1.70 poise, and this was melted in the middle direction of the melting furnace. They were arranged in a straight line with four skin gaps and hung from the solid nozzle 2 of the Sinterkorn, which had a diameter of six ribs and a length of one rib, and was provided at the bottom of the furnace.

The thickness of this hanging rivulet was about 1 willow. This trickle was introduced into the rectangular cylindrical wind extension section described below, which was provided in contact with the lower part of the melting furnace. Horizontal inner upper end section Length 80 Cage x Medium 3.5 Celsius Horizontal inner lower end cross section Length 80 Celsius x Medium 1 solitary height 50 mm Horizontally opposed in 5 steps at approximately equal intervals on both inner surfaces of this wind extension part. An air curtain with the following flow rate (m/min) was stretched downward from the slit of the provided air pipe.

1st stage, 2nd stage, 3rd stage, 4th stage, 5th stage 3310030010003500 The glass rivulet was stretched by being pulled downward while being pinched by the above air curtain, and its diameter became 20 to 25 microns.

This stretching process has almost no cutting, and the production rate is 1.5 k9/sec (5.4 k9/hour) per nozzle, and 108 k9/hour with 20 nozzles, which is higher than the normal roll winding method. The improvement in production efficiency was remarkable. Example 2 The equipment is the same as in Example 1, but the wind-stretching part is suspended from a fulcrum provided one skin below the glass melting furnace, and this is suspended for 30 minutes.
The material was oscillated at 8 to 12 arcs per minute, and received on a conveyor under the bottom 4 of the furnace to obtain a mat of long fibers.

[Brief explanation of drawings]

The drawing is an explanatory diagram showing an embodiment of the present invention in cross section. 1...Glass melting furnace, 2...Nozzle,
3... Wind extension part, 4, 4'... 1st
Tier air pipe, 5,5'...Second stage air pipe, 6,6
'...3rd stage air pipe, 7,7'...4th stage air pipe, 8,8'...5th stage air pipe, 9,9'...6th stage air pipe
Stage air pipe, 10,10'...7th stage air pipe, 1
1,11'...8th stage air pipe.

Claims (1)

[Scope of Claims] 1. Glass melted in a glass melting furnace is made to drip down from a number of nozzles arranged in series at the bottom of the furnace, and the glass trickles hanging down in one line are blown in several steps from both sides. A hanging type inorganic length, characterized in that the glass rivulets are stretched by the wind force of the air curtains, the wind speed is increased as the lower stage is lower, and the gap between the opposing air curtains is decreased as the lower part becomes lower. Textile manufacturing method. 2. In claim 1, a portion provided with several stages of opposing air curtains that clamp down a line of hanging glass rivulets from both sides is swung by a fulcrum provided close to a glass melting furnace. A hanging type inorganic long fiber manufacturing method characterized by the following.