JPH0475176B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bushing device for manufacturing glass fibers.

(Prior Art) Conventionally, in order to manufacture glass fibers, a large number of glass introduction holes 2 are provided at regular intervals in a bushing plate material 1, as shown in FIG. A bushing plate 5 in which a nozzle 4 was formed by drilling a hole 3 therethrough was used.

(Problems to be Solved by the Invention) By the way, when glass fibers are discharged and spun using the bushing plate 5, many of the fibers break, and the thickness of the threads varies widely. The remainder of the thread is removed from the nozzle 4 as shown in Figure 5.
It contracts and gathers at the tip of the nozzle 4, adheres to the outer periphery of the nozzle 4, and expands, so that the nozzle 4
When more glass fibers are discharge spun, there is a problem in that the thickness of the threads varies and uniform glass fibers cannot be obtained.

Therefore, the present invention can reduce the number of yarn breaks during the discharge spinning of glass fibers and reduce the variation in the thickness of the yarn, and furthermore, even if the yarn is broken and shrinks, when the glass fiber is discharge spun again, the variation in the thickness of the yarn can be reduced. It is an object of the present invention to provide a bushing device for manufacturing glass fibers that can extremely reduce the amount of heat generated.

(Means for Solving the Problems) The technical means of the present invention for solving the above problems is to form a bushing plate by drilling a large number of holes arranged at regular intervals in a bushing plate material.
This bushing plate is characterized by needle rods passing through each hole and protruding all at once.

(Function) In the bushing device configured as described above, when glass fibers are discharged and spun from each hole, molten glass does not adhere to the bottom surface of the bushing plate, so there is less yarn breakage and the thickness of the yarn is reduced. There is little variation in the threads, and furthermore, even if the threads are broken and the remaining threads shrink, they will not collect at the tip of the needle rod and adhere to the lower surface of the bushing plate. Therefore, when the glass fibers are discharge-spun again, they will be in a normal state, and substantially uniform glass fibers with very little variation in yarn thickness can be obtained.

Example 1 An example of the bushing device for manufacturing glass fibers of the present invention will be described with reference to FIG. 10 is 100mm wide,
A bushing plate material 11 made of platinum-rhodium 10% alloy with a length of 250 mm and a thickness of 2 mm has a diameter
This is a bushing plate in which a total of 400 1.6 mm holes 12 are bored in a staggered arrangement at 5 mm intervals, and a needle rod 13 with a diameter of 1.2 mm and a tip taper of 30 degrees is passed through each hole 12 of this bushing plate 11, and the length is 4mm
Only one thing stands out all at once. Each needle rod 13
is integrally supported at its base with a plate 14, and the plate 14 is connected to the butting plate 10.
It is supported by a butting box (not shown) at a predetermined interval, in this example, a 40 mm interval.

Example 2 This is the same as Example 1 except that the holes 2 are enlarged in the spinning direction as shown in FIG.

The bushing device 15 of Examples 1 and 2
A conventional bushing plate, that is, a bushing plate material 1 made of platinum-rhodium 10% alloy with a width of 100 mm, a length of 250 mm, and a thickness of 2 mm as shown in Fig. 4, has an outer diameter of 4.5 mm at the base and an outer diameter at the tip. A bushing consisting of a total of 400 glass introduction holes 2 of 2.2 mm in diameter in a staggered arrangement at 5 mm intervals, and a spinning hole 3 of 1.4 mm in diameter penetrated through the bottom of each glass introduction hole 2 to form a nozzle 4. Using Plate 5, glass fibers were continuously spun for a long period of time.

Example 3 However, when glass fibers are spun using these bushing devices, the number of broken yarns is extremely smaller than when glass fibers are spun using a conventional bushing plate, and there is less variation in yarn thickness. I understand. Moreover, it was found that the variation in the thickness of the yarn respun after yarn breakage was much smaller than in the case of the conventional bushing plate. This is because the molten glass discharged from the hole 12 of the bushing plate 10 in the bushing device 15 of the embodiment flows down along the outer periphery of the needle rod 13 as shown in the left half of FIG. 2 and FIG. Since the molten glass is pulled out further, the molten glass does not spread to the periphery of the hole 12 (particularly in the case of Example 2, it does not spread), so there is less yarn breakage and less variation in the thickness of the yarn. In particular, even if the remaining threads shrink after the thread is broken, they gather at the tip of the needle rod 13 as shown in the right half of FIG.
Since there is no adhesion to the lower surface of the fiber, when re-spinning, the glass fiber can be spun normally and there is very little variation in the thickness of the yarn.

(Effects of the Invention) As can be seen from the above explanation, according to the bushing device of the present invention, there is less yarn breakage and less variation in yarn thickness in the discharge spinning of glass fibers, and moreover, after yarn breakage, glass fibers can be reused. Even during discharge spinning, substantially uniform glass fibers with very little variation in yarn thickness can be obtained.

Furthermore, with the bushing device of the present invention, it is easy to set the needle rod in the hole of the bushing plate. Furthermore, the bushing plate has the advantage of being easy to manufacture, since it is sufficient to simply drill a circular hole in the material of the bushing plate.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of the bushing device of the present invention, and FIG. 2 is an enlarged sectional view of essential parts of the bushing device of FIG. FIG. 3 is an enlarged cross-sectional view of essential parts showing the spinning state in a bushing device according to another embodiment of the present invention, FIG. 4 is a partial cross-sectional view of a conventional bushing plate, and FIG. 5 is a cross-sectional view of a conventional bushing plate. FIG. 3 is an enlarged cross-sectional view of the main part showing the state of the remaining yarn after the yarn breakage.

Claims (1)

[Claims] 1. A bushing for manufacturing glass fiber, characterized in that a bushing plate is formed by drilling a large number of holes arranged at regular intervals in a bushing plate material, and needle rods are passed through each hole of the bushing plate and protrude all at once. Device.