JPH03161323A - Molding method for cylindrical structure - Google Patents

Abstract

PURPOSE:To enable simplification of facilities and automation of them besides a reduction of a number of processes, by a method wherein PEEK resin is melted and cured with irradiation of high-density energy while winding a reinforced fiber round a mandrel along with the polyether ether ketone resin (PEEK). CONSTITUTION:High-density energy is applied partly to PEEK resin 10 directly after winding-up of the same round a mandrel with an irradiation device 15 in a chasing manner. With this construction, the PEEK resin 10 is melted in order and integrated with a lower layer part (reinforced fiber) 11 wound up previously. Since the melted part is slipped out of an energy irradiation sphere, the same is cured and a form of a molded product is created.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to fiber-reinforced blastinok (FRP or CFRP) as typified by Rokenoto's motor case, for example.
The present invention relates to a method for molding a cylindrical structure of M.

BACKGROUND OF THE INVENTION A method based on a filament winding method is known as a method for forming a cylindrical structure made of fiber-reinforced plastic that requires heat resistance, such as the motor case of Rokenoto.

This molding method generally involves: ■ a winding process in which carbon fiber impregnated with a thermosetting resin, such as epoxy resin, is wound around a mandrel using a winding machine, and ■ the material wound around the mandrel is wrapped in a resin film called bagging film. The bagging process involves wrapping and evacuating the inside of the carbon fibers impregnated with thermosetting resin to improve the adhesion between them and removing voids. ■The bagged material is placed in an oven or a pot called an autoclave, and the thermosetting resin is A curing step of heating and curing the material.

Problems to be Solved by the Invention In the conventional molding method as described above, it is difficult to automate the molding process because it requires three completely different processes: a winding process, a bagging process, a curing process, and equipment. It takes a great deal of labor and time to obtain a certain shaped product, and there is a limit to the reduction in molding costs.

On the other hand, in recent years, thermoplastic PEEK (polyether ether ketone) resin has attracted attention as an alternative to thermosetting Evokin resin, which is a typical matrix resin for FRP or CFRP. PEEK resin not only has excellent chemical resistance and radiation resistance, but also has the characteristic that when this PEEK resin is used as a matrix resin to make FRP, its fracture toughness and impact resistance are much higher than that of epoxy resin. be.

The present invention is based on the characteristics of PErζK resin as described above [I
L. To provide a molding method that can easily automate the molding process, reduce molding costs, and can mold a cylindrical structure with mechanical properties equivalent to or better than thermosetting ones. The purpose is to

Means for Solving the Problems The present invention is a method for molding a cylindrical structure made of fiber-reinforced plastic, in which continuous reinforcing fibers are wound around a mandrel together with PEEK resin, and in parallel with this winding operation, the It is characterized by performing molding while melting and hardening the PEEK resin by locally irradiating the PEEK resin with high-density energy.

For example, a laser beam is used as the high-density processing material.

According to the present invention, the P immediately after being wound around the mandrel
By locally irradiating high-density energy to follow the F and E K resins, the I) E E K resins are sequentially melted and integrated with the lower layer part that was wrapped earlier, and the melted parts are irradiated with energy. When removed from the irradiation area, it hardens to create the shape of the molded product.

Embodiment FIG. 1 and FIG. 2 are diagrams showing an embodiment of the present invention. 1 is a winding machine, and the mandrel 2i; t of the winding machine 1 is rotationally driven in the direction of arrow X by a motor 4 which is controlled by a control device 3. On the other hand, the winding arm 5 of the winding machine 1 is moved back and forth in the direction of arrow Y (in the axial direction of the mandrel 2) in synchronization with the movement of the mandrel 2 by a drive mechanism 6 that is drive-controlled by the control device 3. It swings in the direction of arrow Z around an axis 7 that is orthogonal to the axial direction of 2 and the vertical direction.

Then, a composite material 12 made of a thermoplastic PEEK resin 10 as a matrix resin and carbon fibers 11 is passed through the nozzle portion 5a at the tip of the winding arm 5, and is synchronized with the rotational movement of the mandrel 2 in the direction of the arrow X. By making the winding arm 5 perform a combined motion in the direction of arrow Y and the direction of arrow Z in FIG. 1, the composite material 12 is wound around the mandrel 2 in upper and lower layers so as to intersect with each other.

Reference numeral 15 denotes a laser beam irradiation device, in which the composite material 1 is wound around the mandrel 2 while controlling the direction of the head portion 15a by a drive mechanism 16 that is driven and controlled by the control device 3.
2, the composite material 12 immediately after being wound is locally irradiated with a laser beam 17 to melt and harden the PEEK resin 10.

Here, the specific form of the composite material 12 will be explained based on FIG. 3. The structure shown in FIG. The one made of Bripreg and the one with the structure shown in the same figure (b) are made of a plurality of carbon fibers 11 and a plurality of string-like PEE
This is a separate form of K resin fiber IOA. Furthermore, the structure shown in the same figure (C) has multiple carbon fibers.
1 and a plurality of PEEK resin fibers 10A are mixed in advance, and the structure shown in the same figure (d) has a plurality of carbon fibers 11 inserted in advance into a single PEEK resin tube IOB. .

The so-called Bripreg type shown in Figure (a) is carbon fiber 11
Since the and PEEK resin 10 are pre-integrated, it has the advantage of easy handling and good uniformity of the fiber blend.The type shown in Figure (b) is advantageous in terms of cost, but the fiber blend is The disadvantage is that the uniformity is not good. moreover,? The types shown in figures (c) and (d) are Fuss 1.
Both types have the advantage that the uniformity of the fiber blend is better than the type shown in FIG.

Therefore, from among the plurality of shapes of the present composite material 12 described in -H, the most suitable one is selected and used according to the shape of the molded product and the required characteristics +'h.

According to the above embodiment, the composite material 12 is attached to the spring attachment arm 5.
When the material is wrapped around the mandrel 2, the laser beam I7 emitted from the laser beam p, t3, rA. ) partially, [j (j Q.j, and this laser beam p.
E E K resin 10 or 10A. , IOB is melted, and then PEEK resin 10 or IOA. IOB is p of laser beam 17, << rA. It hardens outside of the 5 range. This I) E E K resin 10 or IOA. I
By melting and hardening the OB, r) E E K resin 10 or IOA, 10B fits snugly into the carbon fiber 1l.

Note that the present invention is not limited to the above embodiments,
For example, it is possible to use fibers other than carbon fibers as reinforcing fibers, and other high-density processing methods such as electron beams may be used instead of laser beams.

Effects of the Invention As described above, according to the present invention, while winding reinforcing fibers together with PEEK resin around a mandrel,
Since the K resin is melted and hardened by high-density energy injection, compared to conventional molding methods, it is possible to shorten the number of manufacturing steps, simplify the equipment, and make it easier to use. Since the cylindrical structure can be molded between the opening and the opening, it can greatly contribute to reducing the molding cost.

Moreover, the molded structure has a thermoplastic P E
Since EK resin is used as the matrix resin, mechanical properties equivalent to or better than those of conventional structures using thermosetting resin as the matrix resin can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a process explanatory drawing showing one embodiment of the present invention, Fig. 2 is an enlarged explanatory drawing of the main part of Fig. 1, and Fig. 3 is an explanatory drawing showing the form of the composite material used in Fig. 1. be. I...winding machine, 2...mandrel,
10 PEEK resin, 108...PEEK resin fiber, 10 B-. ．． PEEK resin tube, 11 carbon fiber (reinforced fiber), l5... laser beam irradiation device, 17... laser beam. 2: Handle 10: PEEK fat + 0A: PEEK resin composition 10B: PEEK resin 1 fat composition

Claims (1)

[Claims] (1) In a method for molding a cylindrical structure made of fiber-reinforced plastic, continuous reinforcing fibers are wrapped around a mandrel together with PEEK resin, and at the same time as this winding operation, the PEEK resin immediately after being wrapped is locally heated. A method for molding a cylindrical structure, characterized by performing molding while melting and hardening PEEK resin by irradiating density energy.