JPS6137362B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a pot for spinning man-made fibers. An object of the present invention is to provide a synthetic fiber spinning pot with excellent mechanical durability against repeated high-speed rotation over a long period of time, and at the same time to improve safety during high-speed rotation. The pot referred to in the present invention is as shown in Fig. 2.
It consists of a pot side wall 1 and a pot tail 2. In order to maintain an excellent dynamic balance over a long period of time when winding artificial fibers into a cake shape in a pot, and to maintain safety during high-speed rotation for a long time, the side walls and bottom of the pot must be resistant to creep. It is required to have good strength and fatigue resistance at the same time. The present inventors have previously proposed a pot that has excellent dynamic balance during operation and consumes less power during operation. As shown in Fig. 1, the previously proposed pot includes a pot body consisting of a pot side wall 1 and a pot tail 2, which are molded as one body, and a bush 3, and this bush is fitted with a tailor and connected to a pot motor. It was possible to do so, and had the following characteristics.
That is, the pot is made of a thermosetting resin reinforced with at least one selected from carbon fibers and aromatic polyamide fibers, and the length Lw from the bottom surface to the center of gravity is 0.18≦Lw/L≦0.38 with respect to the total length L. A spinning pot having a wall thickness of 1 to 5 mm in the pot body made of a fibrous reinforcing material and a thermosetting resin was proposed as being extremely useful in practice. These pots enabled operation performance when winding man-made fibers into a cake shape, especially operation with excellent dynamic balance, and also made it possible to reduce the power consumption required for this operation. Long repetitions of startup, high-speed rotation, and rapid stop cycles can cause the pottail to become distorted, resulting in a shift in the center line of rotation, resulting in a decline in dynamic balance over time, or the pottail becoming stronger over time. There was a drawback that the pottail part could be damaged during high-speed rotation due to deterioration. The inventors of the present invention have made further studies in order to solve the above-mentioned drawbacks, and as a result have completed the present invention. That is, the pot of the present invention has good creep resistance and strength retention, and has excellent stability over time of dynamic balance and long-term safety during operation. The configuration, embodiments, and effects of the present invention will be described in detail below. The gist of the present invention is that in a pot made of a fibrous reinforcing material and a thermosetting resin, the side wall is reinforced with at least one selected from carbon fiber and aromatic polyamide fiber, and the pot tail is made of carbon fiber and aromatic polyamide fiber. It is reinforced in the circumferential direction by at least one kind selected from group polyamide fibers, and simultaneously reinforced in the radial direction by at least one kind selected from carbon fibers, aromatic polyamide fibers, and glass fibers. A pot for spinning artificial fibers is characterized by: Thermosetting resins in the present invention include epoxy resins, unsaturated polyester resins, phenolic resins,
Acid-resistant materials such as furan resin are preferred. Epoxy resin has the best strength.
Carbon fibers and aromatic polyamide fibers are preferred as reinforcing materials in terms of specific strength and creep resistance.
As shown in FIG. 3, glass fiber can be used as the radial reinforcing material 5 of the pottail if necessary from the viewpoint of workability. As the reinforcement material 5 in the radial direction of the pottail,
At least one selected from carbon fiber, aromatic polyamide fiber, and glass fiber, taking into consideration moldability.
Although it is preferred to use woven or knitted fabrics containing seeds, bundles of these fibers can also be used. In the pot of the present invention, the pot tail is simultaneously reinforced with circumferential reinforcing material 4 and radial reinforcing material 5 as shown in FIG. Even after repeated cycles of start-up, high-speed rotation, and rapid stop over a period of time, the tail does not become distorted.
Therefore, the axis of rotation and the center line of the pot are always kept in alignment, making it possible to maintain excellent dynamic balance over a long period of time. That is, the pot of the present invention is characterized in that its center line will not be eccentric with respect to the rotation axis of the pot motor even if it is operated for a long period of time. In addition, in the pot of the present invention, the pot tail is reinforced by the reinforcing material not only in the circumferential direction but also in the radial direction, so that the pot tail has increased strength against the torsional force that is applied to the pot tail due to repeated operation cycles. Because of this, the pottail will not be damaged even if you drive it for a long time. Therefore, safety can be maintained over a long period of time. The pot of the present invention can be manufactured by commonly used methods such as filament winding, tape winding, sheet winding, and compression molding, and the reinforcement of the pot tail in the radial direction can be performed by these molding operations. This is carried out at any stage by laminating fiber bundles, woven fabrics, knitted fabrics, or prepregs thereof on the pottail portion such that at least a portion of the fibers constituting the fibers are arranged from the center of the pottail toward the outer periphery. Example 1 Using a mandrel 6 having the structure shown in Fig. 4, a circular knitted fabric (8000d, 8000d, 12 days)
4 and 7, and then 6000 filament carbon fiber impregnated with epoxy resin (AER334) was wrapped in the circumferential direction using the filament winding method. Then,
The epoxy resin was cured by heating at 90°C for 2 hours and then at 120°C for 3 hours to produce a pot made of carbon fiber reinforced epoxy resin, with a side wall thickness of 4.
The surface was machined down to mm. Furthermore, by finishing coating the outer surface of the pot with epoxy resin, a pot for spinning artificial fibers made of fiber-reinforced epoxy resin with a fiber content of 58% was obtained. For the pots obtained above, changes in dynamic balance over time and strength against internal pressure were measured. The dynamic balance is B-10 manufactured by Shimadzu Corporation.
Measurement was carried out at 1200 rpm using a two-sided measurement balancer mounted on the side of the mold. In addition, the change over time was measured after repeating 100 cycles of start-up, high-speed rotation (8500 rpm), and stop, each cycle taking 12 hours. The results obtained are shown in Table 1 in comparison with the case where the pottail is not radially reinforced with reinforcing material.

[Table] As shown in Table 1, the artificial fiber spinning pot of the present invention has excellent dynamic balance over a long period of time, exhibits high internal pressure resistance, and has high operational safety. Ta. Example 2 The same carbon fiber as used in Example 1 was applied to the portion corresponding to the pottail of an internally heated mandrel with an outer diameter of 180 mm and a length of 150 mm, from the center to the outer periphery as shown in Figure 3. After approximately 60 fibers were arranged in the radial direction, the same carbon fibers impregnated with epoxy resin (AER334) were further wrapped in the circumferential direction. Then at 90℃ for 2 hours and then at 120℃
After heating for 3 hours to harden the epoxy resin to make a pot made of carbon fiber-reinforced epoxy resin, the surface was cut to a side wall thickness of 4 mm, the outer surface was finished with epoxy resin, and the fiber content was determined. A pot for spinning artificial fibers made of carbon fiber reinforced resin with a capacity of 60% was obtained. Regarding the pots obtained above, changes in dynamic balance over time and strength against internal pressure were measured in the same manner as in Example 1. The results obtained are shown in Table 2 in comparison with the case where the pottail is not reinforced in the radial direction.

[Table] As shown in Table 2, the pot tail of the artificial fiber spinning pot of the present invention has extremely high internal pressure strength, can withstand repeated torsional loads due to repeated startup, high-speed rotation, and stop cycles, and has a tail that can withstand repeated torsional loads. Because it has good creep properties, it can maintain excellent dynamic balance over a long period of time, and has an extremely long operating life.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional artificial fiber spinning pot, Fig. 2 is a sectional view of the pot of the present invention, Fig. 3 is a partial plan view showing the structure of the reinforcing material inside the pottail of the present invention, and Fig. 4 is a sectional view of the pot for spinning artificial fibers. FIG. 2 is a sectional view of a mandrel for filament winding used in pot manufacturing of the present invention. 1...pot side wall, 2...pottail, 3...
... Bush, 4... Pottail circumferential reinforcement, 5... Pottail radial reinforcement, 6...
...Mandrel, 7...Reinforcement material.

Claims (1)

[Scope of Claims] 1 A pot made of a fibrous reinforcing material and a thermosetting resin, the side wall of which is reinforced with at least one selected from carbon fiber and aromatic polyamide fiber, and the pot tail is made of carbon fiber and aromatic polyamide fiber. Reinforced in the circumferential direction by at least one kind selected from polyamide fibers, and at the same time reinforced in the radial direction by at least one kind selected from carbon fibers, aromatic polyamide fibers, and glass fibers. An artificial fiber spinning pot featuring: 2. A fiber bundle whose pottails include at least one selected from carbon fibers and aromatic polyamide fibers;
The artificial fiber spinning pot according to claim 1, characterized in that it is reinforced in the radial direction by a woven or knitted fabric. 3. The artificial fiber spinning pot according to claim 1, wherein the thermosetting resin is an epoxy resin, an unsaturated polyester resin, a phenol resin, or a furan resin.