JP2892175B2 - Multiple structure pot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal spinning pot having an inner wall layer surface and an outer wall layer surface which are excellent in smoothness, tough and hard to be deformed, and which have a simplified processing step and are excellent in economical efficiency. .

[0002]

2. Description of the Related Art Since a centrifugal spinning pot (hereinafter simply referred to as a pot) is used at a high speed, it is extremely important that the pot is not deformed such that the centrifugal force balance is disturbed. Also, if the surface of the inner wall layer of the pot is not smooth,
When the case wound up in the pot is taken out, resistance is generated, and a large force is required, and at the same time, the surface layer of the cake is disturbed.

[0003] As a proposal for solving these problems, for example, there is Japanese Patent Application Laid-Open No. 1-335307, and a considerable solution has been found for the smoothness of the inner wall layer surface. However, since the outer wall layer of the pot is made of a resin having a fiber wound structure, the surface has many irregularities. If the resin is hardened and then further cut to improve the smoothness of the surface, the pot is rotated by the wind speed during high-speed rotation. This has the disadvantage of causing an imbalance and eventually leading to a cross-sectional deformation.

[0004] Therefore, there are problems in practical use, such as complicated processing steps and inevitably taking time and precision for centering during cutting.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem. That is, the surface of the outer wall layer after curing of the resin is excellent in smoothness without performing any cutting process on the side wall portion. To provide a pot. Another object of the present invention is to provide a pot which is capable of shortening a processing step and which is extremely economical.

Another object of the present invention is to provide a pot which is tough and has no risk of deformation even when used for a long time by inserting at least one intermediate layer.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an outer wall layer made of a molded article of a thermosetting resin, and an inner wall made of a molded article of a thermoplastic resin reinforced by a fibrous reinforcing material. A multi-layer pot comprising a layer and at least one intermediate layer made of a resin reinforced with a sheet-like fiber reinforcement or a fiber wound structure provided between an outer wall layer and an inner wall layer.

FIG. 1 shows an example of the structure of the pot of the present invention. In FIG. 1, the pot core comprises a bottom 1 and a tail 2
And an inner wall layer 3, an intermediate layer 5 and an outer wall layer 6. Further, the pot core of the present invention is characterized in that:
Of a thermosetting resin reinforced by a fibrous reinforcing material constituting the above. The outer wall layer 6 is the inner wall layer 5
The same thermosetting resin can be used, or a different thermosetting resin can be used. Further, the outer wall layer 6 may or may not include other reinforcing materials or fillers including fibrous materials.

A known technique can be used for the molding of the molded article, and the type of thermosetting resin and the short fibers or fillers can be those conventionally used in the production of pots. In addition, suppression of expansion and contraction and enhancement of hardness,
Alternatively, in order to improve fluidity, organic or inorganic single fibers can be mixed so as to be randomly oriented, if necessary, or a powder filler such as silica, alumina, or titanium oxide can be mixed. . The type of thermosetting resin and the type of fiber to be used can be arbitrarily adjusted using those used in conventional pots.

The pot core and the outer wall layer 6 may be integrally molded with the intermediate layer 5 inserted, or alternatively, the pot core may be molded, the intermediate layer inserted, and then the outer wall layer 6 molded. Is also good. The intermediate layer 5 is formed by attaching a thermosetting resin to a sheet-like reinforcing material such as prepreg, or formed by winding a continuous fiber having a thermosetting resin attached by filament winding or the like into a wound structure, or A combination of these multilayers is preferred.

What is important here is to select a molding material and a molding method as appropriate so that the intermediate layer 5 does not become unbalanced with respect to the central axis, and furthermore there is no unbonded portion with the inner and outer walls. It is. The length of the cylinder of the intermediate layer 5 is within the entire length of the outer wall portion 6. When the pot core or the upper end portion 7 of the outer wall layer 6 is provided with a fitting groove for a pot lid or the like, the length of the cylinder is set at the upper end portion 7. It does not have to reach.

As shown in FIG. 2, the lower end 8 of the intermediate layer 5 is taken into consideration in consideration of the adhesion between the pot core and the outer wall layer.
May be omitted, and a fitting hole 4 or the like of a required size may be provided.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the pot according to the present invention will be described below. A prepreg having a thickness of 0.2 mm was wound three times to form a cylindrical intermediate layer having a thickness of 0.6 mm. The size of the intermediate layer was 185 mm in inner diameter and 165 mm in cylinder length.
Thereafter, the intermediate layer is placed in a mold, and the inner and outer portions thereof are
An epoxy resin containing 10% of carbon fibers cut to an average length of 2 mm was injected, and a pot was formed by a compression molding method. The size of the side wall and the pot at the center of the pot is 180 mm in inner diameter, 160 mm in inner wall height, and 1 mm in outer wall height.
It was 65 mm and 6 mm thick.

When the smoothness of the inner wall surface after curing of 100 pots was examined, none of the pots required cutting. Next, the dynamic balance of the pot was measured.
The outline of this measuring method is shown in FIG. The drive motor 9 and the measuring jig 10 are rotated by a rotating belt
The pot 13 to be measured was attached to the pot mounting seat 12 at the tip of the measuring jig, and rotated at 1500 rpm to measure the unbalance of the tip collecting surface 14 of the pot. In addition, the measuring jig 10 and the pot mounting seat 1 at the tip end
The imbalance correction of 2 was performed in advance. As a result, 2g
There was no pot showing the above imbalance.

Further, when a rotating shaft was attached to the fitting portion of the pot and the amount of deformation was measured using a dial gauge, none of them had a deformation exceeding 0.1%. Furthermore,
After subjecting 100 pots to industrial operation under the condition of 7,400 revolutions per minute for one year, the change in the deformation amount was investigated. As a result, the most changed one showed only the deformation amount of only 0.06 mm. .

These facts support that the pot of the present invention is extremely excellent in practical use. Also, the inner and outer wall surfaces of the pot were very smooth, and no hindrance when removing the cake and no imbalance during high-speed rotation of the pot occurred.

[0017]

Comparative Example For comparison, 100 pots of the same size as the present invention were manufactured by the method of the example described in JP-A-1-85307 except that carbon fibers cut to an average length of 2 mm were used. did. The thickness of the pot core was 7 mm, and the thickness of the outer wall layer was 4 mm.

By the way, when the dynamic balance before surface cutting was measured, all of them showed an imbalance of 15 g or more, which was not very practical. After that, the surface was shaved by 1 mm and surface processing was performed, and the total thickness was 6 mm.
The unbalance of 3 g or more did not occur, but 26% exceeded 2 g.
In addition, even when the surface cutting was performed, the result was not superior to the dynamic fishing amount at the time of manufacturing the pot of the present invention in which the surface cutting was not performed. The deformation amount after subjecting to continuous operation at 7,400 revolutions per minute for 14 days exceeded 0.3 mm, but did not occur.

However, 100 pots were subjected to industrial operation for one year under the same rotation conditions.
The deformation amount exceeded 0 mm, and it became unusable in less than one year. In addition, 21% of the samples showed a deformation in the area requiring attention of 1.0 mm to 2.0 mm.

[0020]

As shown in the examples, the pot of the present invention is hardly deformed in a long-time operation by inserting an intermediate layer,
Further, since the pot outer wall surface is excellent in smoothness, it is safe even when rotated at a high speed, and is less likely to cause defects for a long period of time. In addition, the inside of the pot inner wall layer is smooth, and no special treatment for cake is unnecessary, and there is no step that occurs in the joints of the projections unlike the conventional product.

In addition, post-cutting for obtaining such smoothness is not necessary, and has advantages such as simplification of the processing steps, so that it is of extremely high practical value.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a multi-structure pot of the present invention.

FIG. 2 is a cross-sectional view showing another example of the multi-structure pot of the present invention.

FIG. 3 is a schematic view showing a method of measuring a dynamic fishing amount according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottom part 2 Tail part 3 Inner wall layer 4 Fitting hole 5 Intermediate layer 6 Outer wall layer 7 Upper end part 8 Lower end part 9 Drive motor 10 Measurement jig 11 Rotating belt 12 Pot mounting seat 13 Pot 14 Tip collecting face

Claims (1)

(57) [Claims] 1. An outer wall layer made of a molded article of a thermosetting resin, an inner wall layer made of a molded article of a thermoplastic resin reinforced by a fibrous reinforcing material, and an outer wall layer and an inner wall layer. A multi-layer pot comprising at least one intermediate layer made of a resin reinforced with a sheet-like fiber reinforcing material or a fiber wound structure provided therebetween.