JPS5846145A - Heat shielding cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shutoff cloth used to prevent sparks during welding and to prevent molten metal slag from scattering.

Conventionally, asbestos cloth, glass fiber cloth, ceramic phyno cloth, etc. have been used as this kind of material, but the temperature at the time of welding sparks and welding slag scattering is t111000 to 2500°C, and the temperature of glass Molten salt lf is about 840°C, asbestos is about 150°C
Since the temperature is 0°C, when a piece of molten metal falls into the cloth, it often penetrates the cloth. Ceramic fiber is mainly composed of tOs*8iost, and its melting temperature is about 1800°C. Ceramic yarn is spun in the same process as asbestos yarn, but because the fiber length is short, it is generally It is necessary to blend 15 to 80% organic fiber as a reinforcing material with asbestos, which also has better heat resistance than asbestos, but has the same problems.

The heat-insulating cloth of the present invention is intended to solve these problems, and is made of yarn made of a blend of ceramic fiber and flame-resistant fiber reinforced with metal wire and glass yarn. . The flame-resistant fiber is acrylic fiber or cellulose fiber, etc., which is fired and carbonized at t-5oo to 400°C, has a carbon/carbon content of 55 to 65%, and has a long-term heat resistance in air of about 800°C. Flame resistant Fi276
Even if it comes into contact with an oxygen-acetylene flame at 0°C, it will only become red hot and will not burst into flames.

To explain the embodiment in detail with reference to the drawings, FIG. 1 shows that the weight ratio is 70% ceramic fiber and 8% flame resistant fiber.
400f/100 (1
! This is a perspective view of a blended yarn 1 twisted so that it has 6 T/25 twists, that is, 6@l twist per 25ff. This yarn is made by plying and twisting the f5T/258 yarn. At this time, the stainless steel wire enters the center, and the blended yarn is twisted by changing the tension between the two so that it is wrapped around it. Figure 3 shows the blended yarn containing stainless steel wire shown in Figure 2, which is twisted by changing the tension between the two. Warp 18
A plain weave cloth with a density of 10 yarns/25FF wefts/250 is formed and wound with a twist count of 25FF.
FIG. 2 is a perspective view of a plain weave cloth made with a density of 25 mm.

The cloth shown in FIG. 8 was tested as a welding spark stopper. The test is to place the cloth horizontally and 50/? Place the L-shaped steel at Ig and use the welding rod (
B 1 (ltφ4) 10 pieces were welded, but about 4 of the welding rods
220f, which was 0%, fell onto the whiteboard as sparks. It was a great surprise that 1,000 particles were scattered again with this cloth, but there was no spark, and the situation remained roughly the same as before the experiment. Similar experiments were conducted using glass cloth and asbestos cloth, and penetration of thick sparks was observed in both cases. Test of Claus in Figure 8 and you against Claus in Figure 5? f'r
It was. In this case, there was almost no re-splatter of sparks, the glass yarn exposed to the surface was slightly melted, and the sparks were captured here, so the danger of re-splatter could be sufficiently prevented.

The present invention has the above configuration, and utilizes the heat resistance of the seven-dimensional fiber, the flame resistance of the flame-resistant fiber, and the instantaneous high heat resistance.
The metal wire is reinforced for its strength. Furthermore, since glass yarn takes advantage of its low heat resistance and easy melting properties, it is extremely effective in preventing welding sparks and slag adhering to the cloth from scattering again. That is, the glass yarn is melted by the sparks falling on the cloth, and the sparks and slag adhere to it, thereby preventing re-scattering.

In addition, a test was conducted in which approximately 200 fk of molten iron was poured into the cloth of the present invention at 2000 DEG C., but it cooled on the cloth and did not penetrate. However, it penetrated glass and asbestos cloth almost instantly. As described above, the heat insulating cloth of the present invention has the remarkable effect of significantly improving heat resistance.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the raw yarn of the heat-insulating cloth of the present invention, Fig. 2 is a perspective view of a twisted yarn of the raw yarn and metal wire, and Fig. 3 is a plain @ woven with the blended yarn shown in Fig. 2. FIG. 4 is a perspective view of a glass yarn wound around the blended yarn shown in FIG. 2, and FIG. 5 is a perspective view of a plain weave sifloose made from the blended yarn shown in FIG. 4. l... Raw yarn 2... Metal wire 3... Twisted yarn 4.
・・Plain weave shifloose 5・Glass yarn 6・・
Plain weave cloth with glass yarn

Claims (1)

[Claims] 50-80- Ceramic Fino (- and 50-20%
A heat-insulating claw made from a blended yarn spun from flame-resistant fibers reinforced with metal wire and glass yarn.