JPH02220829A - Filament winding forming method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a filament winding molding method.

[Prior art] The filament winding molding method is used for automobiles and motorcycles because it produces high-strength molded products.

It has been used as a molding means for rods, shafts, vibrators, frames, etc. in outboard motors and the like.

FIG. 2 illustrates an embodiment of a conventional filament winding molding method.

This filament winding molding method involves the steps of impregnating the reinforcing i-fibers 2 drawn out from the 4I-ovid roving 1 with a hardening resin 4 in the Ia4 fat tank fat 3, and winding the 4I-fibers 2 that have gone through this process around a mandrel 5. A step of attaching the fiber 2 and a step of heating and curing the resin impregnated into the wrapped fiber 2 are carried out, thereby molding an FRP product in which the @M2 is used as a reinforcing material and the resin 4 is used as a matrix. be done.

Note that as the thermosetting resin 4, epoxy, unsaturated polyester, etc. are used.

[Problem to be solved by the invention]

The thermosetting resin is a hard and brittle resin that does not stretch.

Therefore, with conventional molding methods using this thermosetting resin, molded products with high toughness cannot be obtained.

Further, the conventional molding method described above also has the disadvantage that the resin used in the molded product cannot be recycled because of the thermosetting nature of the resin used.

In view of the above circumstances, an object of the present invention is to provide a filament winding molding method that allows a molded product having toughness to be obtained and allows recycling of the resin in the molded product.

(Means for solving the problem) In the filament winding molding method according to the present invention,
A step of simultaneously winding reinforced A fibers and fibers made of a thermoplastic resin around a mandrel;
A step of heating and melting the lft is carried out immediately before or after winding the lft around the mandrel.

(Function) In this filament winding molding method, a matrix made of thermoplastic resin is formed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The drawings show an embodiment of the filament winding molding method according to the present invention.

In this example, reinforcing fibers 11 made of any of the substances A-E listed in Table 1 below and fibers 12 made of thermoplastic resins A-F listed in Table 2 below are used. be done.

Table 1 Table 2 Table 2 The material of the fiber 11 and the monthly yield of the fiber 12 are selected such that the former has a higher heat resistance than the latter. This is to prevent the fiber 11 from being subjected to a heating tube, which will be described later.

Further, as the fibers 12, a narrow film of thermoplastic resin may also be used.

The reinforcing A-fibers 11 are drawn out from the fiber rovings 13 (usually 1 to 6 are used). Then, one or more of the above-mentioned resin fibers #ff112 such as this reinforcing fiber 11
After being collected by rollers 14 and 15, they are simultaneously wound around a mandrel (core material) 17 via a delivery eye 16.

The delivery eye 15 reciprocates left and right to orient the LA fibers 11 and 12 with respect to the mandrel 17.

When the fibers 11 and 12 wound around the mandrel 17 have formed a layer of a predetermined thickness, this layer is heated in a rotary heating furnace (not shown), whereby the fibers 12
．． is melted.

Thereafter, the layer is returned to room temperature to solidify the molten fibers 12. This gives us 1! An FRP molded product is obtained in which M11 is used as a reinforcement (reinforcing material) and resin, which is a melt of the fibers 12, is used as a matrix (base material).

The above heating temperature is, for example, when the material of the I-sleeve 11 is carbon and the fibers 1
If material 2 is polyamide (nylon), 200°C
It is set in the range of ~300°C. This heating temperature range is
On the other hand, the polyamide is sufficiently melted without affecting the carbon by changing its composition.

In the above embodiment, the fibers 12 and 4 are melted in the heating furnace, but as shown by dotted lines in FIG. This heating source 1
It may be melted at step 8.

〔Effect of the invention〕

At Suikomei, 4! is made of thermoplastic resin! The chicks are spring-dressed at the same time as the reinforcing m fibers, and the fibers made of the thermoplastic resin are heated and melted to form a matrix.

Thermoplastic resins have toughness, so the present invention is effective for molding products that require toughness. It can be widely applied as a molding means for parts such as rocket bodies, cylinders, pressure balls, golf shafts, etc.

In addition, it is possible to recycle the molded product, and by heating the molded product, it is possible to perform secondary processing such as bending.

Furthermore, since an inexpensive and lightweight resin such as poly-1-dylene can be used as the matrix material, the molded product can be made cheaper and have a lower Q than before.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing the eleventh embodiment of the filament winding molding method according to the present invention, and FIG. 2 is a conceptual diagram for explaining the conventional molding method. 11... Reinforcing fiber, 12... Thermoplastic resin AIJ
fiber, 17... mandrel, 18... heating source. Application: Suzuki Motor Co., Ltd.

Claims (1)

[Claims] A step of simultaneously winding reinforcing fibers and fibers made of a thermoplastic resin around a mandrel, and heating and melting the fibers made of the thermoplastic resin immediately before or after winding them around the mandrel. A filament winding molding method comprising: