JPH0645474B2 - Bushing plate for glass fiber manufacturing - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement in a bushing plate for producing glass fiber.

(Prior Art) Conventionally, in order to manufacture glass fibers, a large number of glass introducing holes 2 are formed in a staggered arrangement in a bushing plate material 1 as shown in FIG. 3, and a spinning hole 3 is formed at the bottom of each glass introducing hole 2. The bushing plate 5 in which the nozzle 4 is formed so as to project through is used.

(Problems to be Solved by the Invention) By the way, when glass fibers are discharged and spun by the bushing plate 5, if the bushing plate 5 is exposed to high temperature molten glass at about 1200 ° C., as shown in FIG. It gradually hung down and deformed downward into a spherical shape, resulting in yarn breakage and variations in yarn thickness.

Therefore, the present invention is to provide a bushing plate for glass fiber production, which can prevent deformation even if the glass fiber is discharged and spun for a long time.

(Means for Solving Problems) The technical means of the present invention for solving the above problems is characterized in that a convex shell-shaped step is formed on the outer peripheral side of the base of each nozzle of the bushing plate. To do.

(Function) The bushing plate configured as described above is exposed to high-temperature molten glass when the glass fiber is spun from each nozzle for a long period of time, but it is exposed to high temperature molten glass. Since each nozzle is formed, not only each nozzle is reinforced and reinforced, but also the convex step portion which is dense and close to the entire lower surface of the bushing plate functions as a reinforcing rib, and The strength increases substantially in the same manner as the plate thickness of the entire plate increases. Therefore, the bushing plate is prevented from hanging down and is not deformed downward into a spherical shape. Therefore, yarn breakage is greatly reduced, and variations in yarn thickness are also significantly reduced.

(Example) An example of a bushing plate for producing glass fibers according to the present invention will be described with reference to Figs. 10 is width 100 mm, length 2
It is a bushing plate material made of platinum-rhodium 10% alloy with a thickness of 50 mm and a thickness of 1.8 mm, and a glass introduction hole 11 with a top surface diameter of 3.5 mm, a bottom surface diameter of 1.6 mm and a depth of 5 mm is arranged in a zigzag arrangement at intervals of 7 mm. Each glass introduction hole 11 is provided with a spine hole 12 having a diameter of 1.6 mm and a nozzle 13
Are formed to project. On the outer peripheral side of the base of each nozzle 13, a hexagonal convex step 14 having a side of 3 mm and a thickness of 1.8 mm is formed.

The bushing plate 15 of such an embodiment and the bushing plate of the conventional example, that is, a bushing plate material 1 made of platinum having a width of 100 mm, a length of 250 mm and a thickness of 1.8 mm as shown in FIG. Diameter φ1.6mm, depth 4.5m
300 glass introducing holes 2 of m are formed in a zigzag arrangement at intervals of 7 mm.
Glass fibers were continuously discharged and spun for a long time using a bushing plate 5 in which a spinning hole 3 having a diameter of 1.6 mm was formed at the bottom of each glass introduction hole 2 and a nozzle 4 was formed in a protruding manner.

As a result, it has been found that the bushing plate 15 of the embodiment is extremely less deformed than the bushing plate 5 of the conventional example, the yarn breakage is extremely small, and the variation in the thickness of the yarn is extremely small. This is because the bushing plate 15 of the embodiment has the convex step portion 14 having a hexagonal shape on the outer peripheral side of the base of each nozzle 13, so that each nozzle 4 is reinforced and strengthened, and the bushing plate 15 is The convex step portions 14 that are uniformly close to and densely close to the entire lower surface act as reinforcing ribs, and the strength increases substantially as if the overall thickness of the bushing plate was made thicker. There is almost no deformation even when exposed to.

(Effects of the Invention) As described in detail above, the bushing plate of the present invention does not thermally deform downward into a spherical shape even when glass fibers are discharged and spun for a long time, and thus the glass fibers discharged and spun are broken. It can be said that this is an epoch-making thing that can replace the conventional bushing plate because it has the effect that the thickness of the thread does not vary.

[Brief description of drawings]

FIG. 1 is a partial elevation perspective view of a bushing plate of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a partial sectional view of a conventional bushing plate, and FIG. 4 shows a deformed state of the conventional bushing plate. It is sectional drawing shown.

Claims (1)

[Claims] 1. A bushing plate comprising a bushing plate material formed with a large number of glass introduction holes in a staggered arrangement, and a spinning hole penetrating the bottom of each glass introduction hole to project a nozzle. A bushing plate for glass fiber manufacturing, characterized in that a convex shell-shaped step is formed on the outer peripheral side of the base of each nozzle.