JPH0331875Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a valve body made of fiber-reinforced plastic, in particular,
This invention relates to a disc-shaped valve body made of fiber-reinforced plastic that is installed in a pipeline for transporting liquids such as chemical solutions.

[Conventional technology]

A disc-shaped fiber-reinforced plastic valve body is made by impregnating glass fiber with thermosetting resin liquid and forming two disc-shaped materials into a disc-shaped material using a pair of split molds on the left and right or top and bottom. There are those that are molded by pressure and heat, and those that are molded by laminating or pasting glass fibers impregnated with thermosetting resin liquid in a predetermined mold.
It has been known for a long time.

[Problem that the invention attempts to solve]

As mentioned above, when a valve body is made by pressurizing and heating two glass fibers with a split mold or by laminating and pasting the glass fibers together, faults may occur between the glass fibers and the valve body may not be integrated. For this reason, when water pressure is applied or the valve is opened and closed frequently, the force applied to the valve stem creates a force that tends to separate the glass fiber layers, sometimes resulting in damage.

The present invention eliminates the above-mentioned drawbacks of the conventional technology and eliminates the risk of breakage by forming the valve body by wrapping glass roving fibers impregnated with synthetic resin liquid around a roughly disc-shaped core material. This provides a valve body made of fiber-reinforced plastic that is extremely strong.

[Means for solving problems]

The fiber-reinforced plastic valve body of the present invention consists of winding glass roving fibers impregnated with a synthetic resin liquid around the outer peripheral surface of a substantially disc-shaped core material, and curing the synthetic resin liquid to form a substantially disc-shaped valve body. It is characterized by forming a valve body.

[Effect of invention]

In the present invention, since the glass roving fibers are wound around the outer peripheral surface of the core material, the glass fibers are integrated in a continuous state. Moreover, the glass fiber and the core material are integrated with each other while surrounding the disc-shaped core material.

〔Example〕

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

Fig. 1 is a perspective view with one portion cut away, Fig. 2 is a sectional view taken along the line shown in Fig. 1, Fig. 3 is an explanatory view when molding a valve body, and Fig. 4 is a sectional view showing another embodiment. It is.

In the present invention, as shown in FIGS. 1 to 3, a valve body 3 is formed by winding glass roving fibers 2 impregnated with a synthetic resin liquid around the outer peripheral surface of a substantially disc-shaped core material 1. It is. The core material 1 is a thin disk-shaped material made of hard synthetic resin, metal, etc., and is shown as being integral with the valve stem 4. Examples of synthetic resin liquids include liquid polyester resins and epoxy resins to which curing agents, colorants, fillers, etc. are added and mixed. Although not shown, this synthetic resin liquid is stored in a resin tank, and the glass roving fibers 2 are passed through the resin tank to be impregnated with the synthetic resin liquid. Then, as shown in FIG. 3, the core material 1 is rotated around the valve shaft 4, and a glass roving fiber 2 is attached to the outer peripheral surface of the core material 1.
wind it. A substantially disk-shaped valve body 3 is formed by hardening the synthetic resin liquid impregnated into the wound glass roving fiber 2.

FIG. 4 shows another embodiment in which the core member 1 is separate from the valve stem 4. In this device, a shaft core 6 is inserted into a valve shaft hole of a core material 1, and the core material 1 is rotated about the shaft core 6 to wind glass roving fibers around its outer peripheral surface. After the synthetic resin liquid has hardened, the shaft core 6 is inserted and inserted into the valve shaft hole 5.

In the above embodiment, after winding the glass roving fibers around the core material and before the synthetic resin liquid hardens, the outer circumferential surface may be shaped by placing the fibers in a mold and sandwiching them.

[Effect of idea]

As described above, according to the present invention, the glass roving fibers wound around the outer peripheral surface of the core material are integrated in a continuous state. Moreover, since the valve body formed of the glass roving fibers is integrated with the core material while surrounding the core material, even if strong pressure is applied to the valve body or valve stem, the gap between the glass fibers of the valve body The valve body is made of fiber-reinforced plastic and is extremely strong, with no peeling or peeling of the valve body from the core material.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway perspective view, Fig. 2 is a cross-sectional view taken along the line of Fig. 1, Fig. 3 is an explanatory view of molding a valve body, and Fig. 4 is a cross-sectional view taken along the line of Fig. 1.
The figure is a sectional view showing another embodiment. In the figure, 1 is the core material, 2 is the glass roving fiber, and 3
indicates the valve body.

Claims (1)

[Scope of utility model registration request] A fiber-reinforced plastic made by winding glass roving fibers impregnated with a synthetic resin liquid around the outer circumferential surface of a substantially disc-shaped core material, and curing the synthetic resin liquid to form a substantially disc-shaped valve body. Valve body.