JP2673100B2 - Faucet member and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a faucet member made of a thermoplastic resin that can be used at the end of a fluid supply path such as a water pipe, and a method for manufacturing the faucet member.

[0002]

2. Description of the Related Art Generally, a faucet member has a fluid inlet, a fluid outlet and a valve member mounting hole, and a valve hole which is opened and closed by a valve is provided in a cavity extending from the fluid inlet to the fluid outlet. A partition portion is formed. The faucet member having such a structure is integrally cast by brass die casting using a sand mold.

[0003]

In the conventional method for manufacturing a faucet member, it is necessary not only to remove the burr generated by casting, but also to ream the inside of the piping port, the valve member mounting hole and the outflow port. Various post-processings such as forming, finishing, and plating of the male screw or the female screw are required, and it is difficult to reduce the manufacturing cost. Therefore,
As a method of manufacturing faucet member easily and at low cost,
It is possible to manufacture the faucet member by injection molding using a thermoplastic resin as a raw material.However, since the faucet member cannot be integrally molded with the thermoplastic resin because of the complicated structure inside the cavity as described above, Faucet members made of a plastic resin are not generally known.

Even if the faucet member is made of a thermoplastic resin, a method may be considered in which the faucet member is divided into left and right half-faucet members, and the two faucet members are joined together with an adhesive or the like. However, in this method, the faucet member has sufficient strength against the water pressure of the tap water, and since the faucet is exposed not only to water but also to hot water, it has sufficient resistance and strength to hot water. It is difficult to satisfy this condition. In fact, a faucet member made of a thermoplastic resin that can be used for water supply at home is not provided.

An object of the present invention is to provide a faucet member which can be easily manufactured from a thermoplastic resin and can be put to practical use with sufficient strength against water pressure and hot water of a tap water, and a manufacturing method thereof. .

[0006]

A faucet member of the present invention has a fluid inlet, a fluid outlet and a valve member mounting hole, and is opened and closed by a valve in a cavity extending from the fluid inlet to the fluid outlet. It comprises a faucet-shaped body made of a thermoplastic resin in which a partition having a valve hole is formed, and a coating layer made of a thermoplastic resin formed on the surface of the faucet-shaped body.

The faucet member manufacturing method of the present invention has a fluid inlet, a fluid outlet and a valve member mounting hole, and a valve hole opened and closed by a valve in a cavity extending from the fluid inlet to the fluid outlet. A pair of half-shaped bodies each having a shape in which a faucet-shaped body having a partition portion provided is vertically divided into left and right sides, and the faucet-shaped body is formed by molding each with a thermoplastic resin, and adhering respective facing surfaces of the pair of half-shaped bodies. Is formed, and the surface of the faucet-shaped body is further covered with a thermoplastic resin.

[0008]

In the faucet member of the present invention, since the surface of the faucet shaped body made of thermoplastic resin in the same shape as the conventional faucet is covered with the coating layer, even if it is made of thermoplastic resin, It has the strength to withstand practical use as a faucet member.

Further, in manufacturing, a pair of half-shaped bodies each having a faucet-shaped body vertically divided into left and right sides are molded with a thermoplastic resin having sufficient heat resistance, and the facing surfaces of the respective half-shaped bodies are bonded together. A faucet member having sufficient strength against water pressure and hot water can be obtained by forming a faucet-shaped body by coating the surface of the faucet-shaped body with a thermoplastic resin.

[0010]

1 is a perspective view showing an example of a faucet member according to an embodiment and a valve member attached to the faucet member, and FIG. 2 is a vertical sectional view of the faucet member to which the valve member is attached.

The faucet member 10 includes a faucet-shaped body 12 made of a thermoplastic resin and a coating layer 14 made of a thermoplastic resin for covering the surface thereof.
Consisting of The faucet-shaped body 12 is a pair of half-shaped bodies 12a and 12b (FIG. 3) that are vertically divided into left and right as described later.
By adhering the facing surfaces of the above, the fluid introduction port 11, the valve member mounting hole 13, and the fluid discharge port 1 are provided like the conventional faucet member.
5 is formed. A partition portion 17 that partitions the cavity 16 into an inlet side and an outlet side is formed in the cavity 16 extending from the fluid inlet 11 to the fluid outlet 15, and a valve hole 18 is provided in a horizontal portion at the center thereof. This valve hole 1
8 is a valve member 20 mounted through the valve member mounting hole 13.
The valve 21 is opened and closed.

The valve member 20 is composed of a shaft member having a predetermined length which is vertically arranged through the valve member mounting hole 13 of the faucet member 10. At its upper end, a handle 22 of known shape
Is provided with a spline 23 for coupling so as to rotate integrally, and a male screw portion that can be screwed into a female screw portion 19 formed inside the valve member mounting hole 13 of the faucet-shaped body 12 is provided at an intermediate portion of the shaft member. 24 is provided, and a valve 21 that opens and closes the valve hole 18 is provided at the lower end of the shaft member. The shaft member constituting such a valve member 20 is made of metal as in the conventional case, and is the same as the conventional one together with the valve 21 provided at the lower end thereof.

Therefore, when the valve member 20 is attached to the faucet member 10, the valve member 20 is attached to the valve member attachment hole 13 of the faucet member 10 as shown in FIG. The nut-shaped stopper plate 26,
The male screw portion 28 provided around the valve member mounting hole 13 is fitted and fixed. Then, the handle 22 is attached to the upper end of the valve member 20.

When the handle 22 is rotated in one direction in this state, the male screw portion 24 of the valve member 20 rotates along the female screw portion 19 of the faucet member 10 to move the valve member 20 upward or downward, The valve 21 at the lower end opens or closes the valve hole 18 of the partition 17. That is, when the handle 22 is rotated in the direction in which the valve member 20 moves upward, the valve hole 18 of the faucet member 10 is opened, and the fluid contained in the cavity 16 from the fluid inlet 11 is opened in the valve hole 18.
And is discharged from the discharge port 15. Conversely, handle 2
When 2 is rotated in the direction in which the valve member 20 moves downward, the valve hole 18 of the faucet member 10 is closed by the valve 21 as shown in FIG. The fluid is held in a non-drained state.

The faucet-shaped body 12 is made of a thermoplastic resin (for example, polysulfone resin, polyphthalamide resin) which can withstand the pressure, temperature (particularly hot water) of a fluid (for example, tap water) applied thereto and chemicals mixed in the fluid. , Polyamideimide resin, polyketone resin, etc.). The coating layer 14 that covers the surface of the faucet 12 is also formed of a thermoplastic resin that has the same physical properties as the above-mentioned thermoplastic resin and that can adhere to the surface thereof. Note that, in FIG. 2, the thickness of the coating layer 14 is represented relatively larger than it actually is in order to represent the coating layer 14.

A faucet member 10 having such a two-layer structure.
Although it is made of a thermoplastic resin, it has the same physical and chemical strength as a conventional metal faucet, and can be put to practical use as a faucet attached to various fluid supply paths including water pipes. .

Next, a method of manufacturing the faucet member 10 will be described.

FIG. 3 is a perspective view showing a pair of half-shaped bodies forming the faucet member of the embodiment, and FIG. 4 is a faucet-shaped body obtained by adhering opposing surfaces of the pair of half-shaped bodies. FIG. 5 is a schematic view of a mold for forming a coating layer on the surface, and FIG. 5 is a partial cross-sectional view showing a means for holding the faucet body in the mold so that a uniform coating layer is formed on the surface of the faucet body. It is a figure.

First, as shown in FIG. 3, the faucet-shaped body 12
Of a pair of half-shaped bodies 12a, 12 which are vertically divided into
b is molded with a thermoplastic resin. That is, the pair of half-shaped bodies 12a and 12b are formed by injection molding. Then, by bonding the respective facing surfaces of the half-shaped bodies 12a and 12b, as described above, the fluid introduction port 11 and the valve mounting hole 1 are formed.
3, the faucet-shaped body 12 having the fluid discharge port 15 and the partition portion 17 is formed. As the bonding method, bonding with an adhesive, fusion bonding with ultrasonic waves, or the like can be used. Alternatively, mechanical coupling means such as screws may be used.

Next, the coating layer 14 is formed on the surface of the faucet-shaped body 12.
To form This is done using a mold 31 as shown in FIG. The mold 31 is composed of a pair of symmetrical mold members having recesses that can be housed with the faucet-shaped body 12 sandwiched therebetween.

In use, the faucet-shaped body 12 is arranged in the concave portion between the pair of molds 31, and the molten resin is injected from one or a plurality of supply ports 32 provided in the mold 31 in advance. The coating layer 14 is formed. At this time, in order to make the thickness of the coating layer 14 uniform, as shown in FIG. 5, a method of fixing the fluid introduction port 11, the valve mounting hole 13, and the fluid discharge port 15 with pins 33 is used. FIG. 5 shows a state in which the fluid introduction port 11 is supported by the pin 33 and the outer side of the faucet-shaped body 12 is uniformly covered with the coating layer 14. When the coating layer 14 is formed, the end portion of the fluid introduction port 11 of the faucet-shaped body 12 is formed in a stepped shape, so that the coating layer 14 covering the surface of the faucet-shaped body 12 is hard to peel off and becomes strong.

The pin 33 serves as the faucet-shaped body 12 as described above.
Is fixed to the die 31 to make the thickness of the coating layer 14 uniform and prevents molten resin from entering the cavity 16 through the fluid inlet 11, the fluid outlet 15 or the valve member mounting hole 13. It also plays a role.

The thermoplastic resin faucet member 10 formed by the above method is not sufficiently durable against the pressure of tap water or the like at the portion where the faucet-shaped body 12 is bonded.
By covering the outside with the coating layer 14, the adhesive portion is reinforced, and since the surface of the faucet-shaped body 12 and the coating layer 14 are fused and integrated, even if pressure is applied to the faucet-shaped body 12, The pressure does not cause any inconvenience such as distortion. Therefore, it has a physical strength that can be practically used like a conventional metal faucet.

Although the above embodiments are mainly directed to taps, the technique of the present invention makes it impossible or difficult to integrally form a thermoplastic resin in terms of shape or structure in addition to the faucet member. It can be widely applied to various hollow bodies. Such shaped bodies are hollow articles with so-called undercuts, for example bottles such as beer bottles and milk bottles or vases, which are generally expensive as they cannot generally be produced by injection molding. It is manufactured using the casting method. Such articles are also according to the method of the present invention.
Molded with a thermoplastic resin, it can be manufactured as a product with sufficient strength.

[0025]

INDUSTRIAL APPLICABILITY The faucet member of the present invention has the same physical strength as a conventional metal faucet because its surface is covered with a coating layer even though it is made of a thermoplastic resin. It has sufficient practicality. Further, the method for manufacturing a faucet member of the present invention is a method suitable for mass production of injection molding of a thermoplastic resin, does not require various steps such as manufacturing a conventional metal faucet, and is a low cost faucet member. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a faucet member of the present invention.

FIG. 2 is a sectional view of the faucet member of FIG.

FIG. 3 is a perspective view showing a pair of half-shaped bodies forming a faucet-shaped body.

FIG. 4 is a diagram showing a step of forming a coating layer on the surface of the faucet-shaped body using a mold.

FIG. 5 is an enlarged sectional view showing a part of the mold of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Faucet member, 11 ... Fluid inlet port, 12 ... Faucet shaped body, 12a, 12b ... Half shaped body, 13 ... Valve member mounting hole,
14 ... Coating layer, 15 ... Fluid outlet, 16 ... Cavity, 17 ...
Partition part, 18 ... Valve hole, 19 ... Female thread part, 20 ... Valve member, 21 ... Valve, 22 ... Handle, 23 ... Spline, 2
4 ... Male screw part, 26 ... Stopper, 27 ... Female screw part, 28 ...
Male screw part, 31 ... Mold, 32 ... Molten resin supply port, 33 ...
pin.

Claims (2)

(57) [Claims] 1. A partition part having a fluid inlet, a fluid outlet and a valve member mounting hole, and a valve hole opened and closed by a valve is formed in a cavity extending from the fluid inlet to the fluid outlet. Faucet member comprising a faucet-shaped body made of the above-mentioned thermoplastic resin and a coating layer made of a thermoplastic resin formed on the surface of the faucet-shaped body. 2. A faucet having a fluid inlet, a fluid outlet, and a valve member mounting hole, and a partition having a valve hole opened and closed by a valve in a cavity extending from the fluid inlet to the fluid outlet. A pair of half-shaped bodies, each of which is formed by vertically dividing the shaped body into left and right sides, are molded with a thermoplastic resin, and the facing surfaces of the pair of half-shaped bodies are adhered to each other to form the faucet-shaped body. A method for manufacturing a faucet member, which further comprises coating the surface of the body with a thermoplastic resin.