JPS59137507A - Pot for spinning artificial yarn - Google Patents

Abstract

PURPOSE:The titled pot having improved strength, not causing deformation even by the use of ultra-high speed rotation, obtained by molding an insert at the bottom of the pot into a specific shape. CONSTITUTION:For example, a chemical-resistant material such as Bakelite, etc. is molded into the inverted triangular insert 1, and the protrusion 7 is formed at the peripheral part 6 of the bottom 5 of the insert. The fibrous reinforcing material 3 impregnated with a thermosetting resin, etc. is wound several times around the insert 1 as a bottom part, and the resin, etc. is cured to form the main body 3 of the pot. In the operation, the insert 1 is fixed in the side wall 4 of the pot. The height of the protrusion 7 at the peripheral part of the bottom 5 of the insert is preferably >=10mm. from the bottom 5 of the insert.

Description

[Detailed description of the invention] The present invention relates to improvements in pots for spinning artificial fibers.

In recent years, the production of man-made fibers has become more popular due to increased spinning speed and improved strength and lightness from the standpoint of energy conservation. Proposals to meet these demands include Japanese Patent Publication No. 47-36206, Japanese Patent Publication No. 44.570/1982, and Japanese Patent Application Laid-Open No. 56-1989.
The method described in Publication No. 15406° is known. The pot manufactured by these methods includes a pot bottom insert made of a chemical-resistant material and an acid-resistant thermosetting resin, such as an epoxy resin, as shown in Figure 1 (longitudinal cross-sectional view of the pot). The pot body 2 is formed by winding glass fibers, carbon fibers, aromatic polyamide fibers, etc. in diagonal or almost parallel layers multiple times, and then hardening the resin. The pots produced in this way are lighter and more resistant to acid than the traditionally used Bakelite pots reinforced with piano wire.
It also made a great contribution to energy conservation.

However, on the other hand, it had drawbacks that conventional Bakelite pots did not have. The strength of the contact point between the pick, the bottom of the pot, and the side wall of the pot is weak compared to other parts, and due to the nature of the spinning pot, there is a large force applied to this part of the pot due to an error in the roundness of the side wall of the pit, which ranges from 80oO to 10,000 degrees. This has the disadvantage that the cross-sectional shape of the pot changes from a rectangle to a parallelogram.

The present inventors have discovered that by specially molding the insert at the bottom of the pot, a pot that is less likely to deform as described above can be manufactured.

An object of the present invention is to provide a spinning pot that solves the above-mentioned problems.

Further, the gist of achieving the object of the present invention is to provide a spinning pot made of thermosetting resin reinforced with a fibrous reinforcing material, in which a pre-shaped insert 1 is fixed in the pot side wall 4, and a circumferential portion 6 of the bottom surface 5 of the insert 1
Next, embodiments of the spinning pot of the present invention will be described with reference to drawings showing one embodiment.

FIG. 2 is a sectional view showing the structure of a spinning pot according to the present invention. In the figure, the insert 1 is made of a chemical-resistant material such as Bakelite, has an inverted triangular shape, and has a protrusion 7 formed on a circumferential portion 6 of the bottom surface 5 of the insert. In this embodiment, the protrusion 7 is formed into a ring shape.

Alternatively, it may be formed into a comb shape.

After wrapping the fibrous reinforcing material 3 containing thermosetting resin around this insert 1 as the bottom part several times,
The pot body 3 is formed by curing the thermosetting resin described above. At this time, the insert 1 is fixedly installed within the pot side wall 4.

As the fibrous reinforcing material 3, in consideration of strength and acid resistance, it is preferable to use carbon fiber, aromatic polyamide fiber alone, or a mixed fiber of both.

Further, it is preferable that the height of the circumferential protrusion 7 on the insert bottom surface 5 is greater than or equal to the insert bottom surface 5 by ploim. If it is less than 10, the desired effect of the present invention will be weak. 8 is the pot power.

The present inventors manufactured pots with different heights of the protrusions 7 described above, operated the pots continuously at 8000 rotations FJf+ for 336 hours, and measured the maximum swing width of the tip of the pots after the operation. The results obtained are shown in FIG. From FIG. 3, it can be seen that when the height of the protrusion 7 is formed to be more than 10 mwt higher than the bottom surface 5 of the insert, the maximum swing width of the tip of the pot becomes extremely small.

This strengthens the strength of the contact between the bottom of the pot and the side wall of the pot, and even when the pot is rotated at extremely high speeds, the cross-sectional shape of the pot does not deform into a parallelogram, producing an attractive effect.

Furthermore, conventionally, the cake rolled up in the pot had the disadvantage that fuzz was easily generated near the tangent between the end face and the circumference, but in the pot according to the present invention, the protrusion 7 is formed in advance during insert molding. It is possible to finish the inner surface, and it also has the effect of suppressing the formation of fuzz on the cake that comes into contact with this part after being formed into a pot.

As described above, the present invention provides a pot for spinning artificial fibers that has improved strength and does not cause deformation even when used at ultra-high speed rotation.

Using an internal heating mold with an exception diameter of 180 mm and a length of 150 mm, carbon fiber (bundle part 4 Slon x 1 Besphite 60
00") 12,000 denier, aromatic polyamide fiber ("Kepler 49" manufactured by DuPont) 18,000 denier, and the same volume of epoxy resin ("AER354" manufactured by Asahi Kasei ■)
''), and then the insert l with the protrusion 7 having a height of 15 mm was attached to the above-mentioned mold with a thickness of 3 mm.
It was wound diagonally until it was in 5 order.

Next, heat at 90℃ for 2 hours and then at 120℃ for 3 hours to harden the epoxy resin and form a pot.
After cutting the surface until it looked like a friend, the outer surface was finished and painted using epoxy resin.

11 revolutions 8000 for the pot obtained above
The pot was operated continuously for 336 hours at rotation/min, and the maximum swing width of the tip of the pot was measured after the operation. As a result of measurement, the swing width is 7X1
Extremely small at 0-2mm, the swing width of a conventional pot is 60mm
It was shown that the strength was greatly improved compared to X10-2 mm. (See Figure 3).

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional spinning pot made of fiber-reinforced resin, FIG. 2 is a vertical cross-sectional view of the spinning pot of the present invention, and FIG. 3 is a circumferential section of the insert in the spinning pot of the present invention. FIG. 3 is a diagram showing the relationship between the height of the protrusion and the maximum swing width of the tip of the pot after ultra-high-speed rotation. l...Insert, 2...Pot body, 3...Fibrous reinforcement material, 4...Pot side wall, 5...Bottom surface of insert , 6...
Circumferential portion, 7...Protrusion, 8...Pot Kakka-0 Patent applicant Asahi Kasei Corporation No. 1VIi Figure 2

Claims (1)

[Scope of Claims] l. A spinning pot made of thermosetting resin reinforced with a fibrous reinforcing material, in which a pre-shaped insert l is fixed in the pot side wall 4, and the insert 1 The spinning pot 2 is characterized in that a circumferential portion 6 of the bottom surface 5 of the insert protrudes upward, and the height of the circumferential portion protrusion 7 of the bottom surface 5 of the insert is 10 mWL or more from the bottom surface 5 of the insert. A pot for spinning artificial fibers according to claim 1, characterized in that: