JPS58205730A - Forming method of composite product - Google Patents

Abstract

PURPOSE:To obtain a composite product reduced in preparing cost and light in weight by a method wherein objects are preformed from prepreg to the semihardened state and these semihardened parts are combined to be coated with packing material, heated, pressed, hardened and form the whole body. CONSTITUTION:Parts (such as beam l of a frame reinforcing outer plate, rib 2 thereof, filler 3, cap 4, outer plate 5) are preformed from prepreg (such as epoxy resin impregnated unidirectionally oriented carbon fibers etc.) until preferably, the buffering plate 9, said prepreg, silica cloth 12, vacuum film 11 are laminated in order on a jig, heated, pressed and semihardened. These semihardened objects are assembled and all the assembled parts are coated with packing material (such as silicone rubber bladder mold etc.) 15 and, generally, hardened and formed at 100p.s.i. and 180 deg.C to obtain the desired formed part. USE:Composite material used for airplanes, automobile, etc.

Description

[Detailed description of the invention] Concerning methods of forming material products.

The conventional molding method for composite material products involves heating and pressurizing prepreg to harden and mold the parts, and then joining the parts with fasteners to assemble the whole.

However, with this forming method, the strength of the fastener joint is low, so the thickness is increased in this area, which increases the weight, and the manufacturing cost increases because drilling work and jigs are required to assemble the fastener joint. The disadvantage is that it increases.

The present invention is proposed to improve the above-mentioned drawbacks, and is a molding method that achieves significant weight reduction and manufacturing cost reduction compared to conventional molding methods.

That is, the present invention is characterized in that after the Zurizuregi is preformed into semi-hardened parts, the parts are assembled, the whole is covered with a backing material, and the whole is hardened and molded at the same time by heating and pressurizing. It is a method for forming composite material products, and
A buffer plate is placed on top of the jig. The method for forming a composite material product described above is characterized in that silica cloth and bayum film are laminated in this order, and heat and pressure are applied to preform the legs into semi-hardened parts.

Next, one embodiment of the present invention will be specifically explained based on the drawings.

Figures 1 to 3 are schematic diagrams of the method for forming a frame-reinforced outer skin, which is one of the composite material products. Figure 1 is the preforming of parts, Figure 2 is the combination of parts, and Figure 6 is the entire hardening. Showing molding.

First, in Figure 1, girder 1, which is a part of the frame reinforced outer panel,
．． Liz 2. Filler 6. + Yatsuzu 4° outer plate 5 with each mold 6, 7, 8, 9, 10 and neem film 11. Silica cloth 12. Using sealant 16, 15Ps
Using vacuum pressure at 1200° C. and heating at 1200° C., we preform everything from unidirectionally aligned carbon fibers and epoxy resin to semi-hardened parts. However, the filler 3 may be preformed by heating using the iron seal 14 instead of using the vacuum pressurization and heating described above.

Next, in FIG. 2, girder 1, which is a part in this semi-hardened state. Liz 2. Assemble the frame-reinforced outer panel by combining the filler material filter + Yatsuzu 4° outer panel 5.

Finally, in Figure 5, the entire combined bone reinforcement outer plate is shown separately. Cover with thick wood 15.

Using vacuum 16 and Au 1-clay-517, 50-1
The entire body is simultaneously hardened and molded by applying a pressure of 00 PSi and heating to 180'O. Note that the rose 4 jig material 15 has a thickness of 2 mm.
Due to its flexibility and heat resistance, Zuratard, which is made of silicone resin, does not break during curing due to pressure and can be molded well.

When a frame-reinforced outer panel made of a composite material is manufactured using the above-described molding method, the dimensional accuracy of each part of the outer panel can be increased, and the weight of the entire outer panel can be reduced.

FIGS. 4 and 5 are explanatory diagrams showing an embodiment of preforming in the present invention. This embodiment is suitable for preforming thick outer panels having a thickness of 2 ynm or more.

This preforming is carried out by placing a buffer plate 19 on a jig 18 made of aluminum or steel and having a coefficient of thermal expansion comparable to that of the molded product, as shown in FIG. Unidirectionally aligned carbon fiber and epoxy resin resin register 20. Nyloshiku O 21 for mold release. Fluorinated ethylene′
:J-Zuji cash register perforated film 22. Silica cloth for resin absorption12. Aluminum plate 23 for pressurization. Glass cloth24. Perforated film of fluorinated ethyreshi 22. Glass cloth24. Micro glass25. The neem films 11 were laminated in this order, and as shown in Figure 5, vacuum pressure was applied to 15 Psi, and autoclave pressure was applied to 60 Psi.
PSi, heating was carried out at 120°0° for 60 minutes. In this case, the sealing material 13 is interposed on the joint surface between the jig 18 and the neem film 11, and
Teflosite'126 is installed on the end face of the lamination.

In this preforming, autoclave pressurization is applied, so even thick outer plates can be obtained with uniform thickness.

[Brief explanation of the drawing]

1, 2, and 6 respectively show the preforming of parts in the molding method of the present invention, the combination of one part, and the entire hardening molding. a2. a3. a
4. a5. Figures 2a and 6a are perspective views of the first
Figure b1. b3. b4. b5. Figures 2 and 6 are sectional views thereof. Further, FIGS. 4 and 5 are explanatory diagrams showing an example of a laminating method and a pressurizing/heating method in preforming of the present invention, respectively. 1... Digit, 2... Rizu, 3... Filler, 4...
+ Serazu, 5... Outer plate, 6.7.8.9.10.
... Molding mold, 11... Bar+neem film, 12...
・Silica cloth, 13...Sealing material, 14...Irosi, 15...Packing material, 16-X sky, 17-・
・Autoclave. Tori 4 Senshio 5 Figure IIj C'7y11n) Procedural amendment (voluntary) 1. Indication of the incident 1988 Patent application No. 88521
No. 2. Name of the invention Method for forming composite material products 3. Relationship with the amended case Patent applicant address 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Name (620) Mitsubishi Heavy Industries, Ltd. 4. Agent Address 2-5-II Marunouchi, Chiyoda-ku, Tokyo
p3 Correct "bladder mold" on page 4, line 8 of the specification to "pressure bag."

Claims (1)

[Claims] (11-j After preforming the parts to a rigid semi-hardened state, the parts are assembled and the whole is covered with a heat-resistant material,
A method for molding composite material products that is characterized by simultaneously curing and molding the entire product by heating and applying pressure. (2) Buffer plate, Tsurizuregi, Shirikaku D on the jig
Molding of the composite material product according to claim 1, characterized in that the suspension legs are preformed into semi-cured parts by laminating the base, rubber and neem films in this order and applying heat and pressure. Method.