Cross-Reference to Related Applications

This application is the U.S. National Phase under 35 U.S.C. § 371 of International Application PCT/CN2018/110597, filed Oct. 17, 2018, which claims priority to Chinese Patent Application No. 201721335945.4, filed Oct. 17, 2017 and Chinese Patent Application No. 201711061574.X, filed Nov. 2, 2017. The disclosures of the above-described applications are hereby incorporated by reference in their entirety.

TECHNICAL FIELD

The invention belongs to the technical field of mechanic, and particularly relates to a plastic faucet body and a die for molding the same.

BACKGROUND ART

The existing faucet body is generally H-shaped and comprises a left valve seat part, a right valve seat part, and a connecting part located between the valve seat parts; an installation containing slot is formed in each of the valve seat part and can be used for respectively installing a valve body, and each opposite valve body can be rotationally controlled by a handle; a central flow channel is formed in the connecting part, and two ends of the central flow channel are respectively communicated with an installation containing slot in the valve seat part, at least one water outlet is disposed in the middle of the central flow channel and communicated with the central flow channel, and the water outlet can be used for connecting water outlet members such as a water outlet pipe of a faucet or a shower head; at present, the faucet body structure is universally formed by integrally casting metal copper, but there are disadvantages that the process is complicated, sealing is poor and cost is high.

In order to overcome the defects of the metal faucet, a secondary injection molding process is adopted in the prior art, but the secondary injection molding has a problem of leakage of an injection molding joint surface, as shown inFIG.1of the invention with the publication number of CN201475461U discloses an injection molding structure of a faucet inner core body, wherein a cold water inlet pipe and a hot water inlet pipe are provided on an integrally molded water channel main body of the injection molding structure, and the cold water inlet pipe and the hot water inlet pipe are respectively provided with a cold water inlet channel and a hot water inlet channel, and a cross-beam is connected between the channels, another side core-pulling channel communicated with the cold water inlet channel, another side core-pulling channel communicated with the hot water inlet channel, and a water outlet are provided on the cross-beam. The side core-pulling channel communicated with the cold water inlet channel, the side core-pulling channel communicated with the hot water inlet channel and the water outlet form an integrated water channel main body which is three-way inside, side core-pulling holes in the integrated water channel main body are provided with sealing plugs for seal. However, the faucet inner core body of the above-mentioned patent comprises an integrally-molded water channel body and a secondary injection molding wrapping part, two times of injection molding are required, and sealing elements such as sealing plugs for seal and the like need to be assembled during the interval between two injection molding process flows.

SUMMARY OF THE INVENTION

The invention aims at: in order to simplify the process flow, reduce the secondary molding wrapping, facilitate the one-mold multi-cavity production, reduce the cost and improve the production efficiency, the invention provides a novel plastic faucet body formed by one-time integral injection molding and a molding tool thereof.

The technical solution adopted by the invention is as follows:

The plastic faucet body comprises a left water inlet pipe and a right water inlet pipe, wherein a connecting cross-beam is disposed between the left water inlet pipe and the right water inlet pipe, a water outlet is disposed in the middle of the connecting cross-beam, a left water inlet channel is disposed in a left cross-beam, the left water inlet channel is communicated with the left water pipe, a right water inlet channel is disposed in a right cross-beam, the right water inlet channel is communicated with the right water inlet pipe, and the left water inlet channel and the right water inlet channel are communicated with the water outlet, an another end of the left cross-beam is provided with a left core-pulling channel communicated with the left water inlet channel, another end of the right cross-beam is provided with a right core-pulling channel communicated with the right water inlet channel, and the axes of the left water inlet channel and the right water inlet channel are parallel; each of the left water inlet pipe and the right water inlet pipe is connected with a copper pipe; and the copper pipes are respectively communicated with the corresponding left water inlet pipe and the right water inlet pipe.

Further, a distance between each end face of the left core-pulling channel and the right core-pulling channel and the axis of the water outlet are equal to the outer diameter of the water outlet.

Further, the left water inlet channel is parallel to the axis of the right water inlet channel.

Further, each of the left core-pulling channel and the right core-pulling channel is provided with a sealing plug and a sealing ring.

Further, the axes of the right water inlet pipe, the left water inlet pipe and the water outlet are parallel.

Further, an angle between the axis of the water outlet and a plane where the axes of the left water inlet pipe and the right water inlet pipe are located is 45°.

A die for molding a plastic faucet body comprises a fixed mold, a movable mold and a mold-core installing seat, wherein the mold-core installing seat is provided with a left water inlet mold core, a right water inlet mold core and a water outlet mold core; a working surface of the fixed mold is provided with a first injection molding cavity, a working surface of the movable mold is provided with a second injection molding cavity, and the first injection molding cavity and the second injection molding cavity cooperate to form an injection molding cavity; the injection molding cavity comprises a flow passage and a product molding cavity; a mold core of the mold-core installing seat is provided within a cavity corresponding to the product molding cavity, the second injection molding cavity is provided with a right side core-pulling hole, the right side core-pulling hole is provided with a left water inlet channel core-pulling rod, the first injection molding cavity is provided with a left side core-pulling hole, and the left side core-pulling hole is provided with a right water inlet channel core-pulling rod.

Further, a plurality of fixed molds and a plurality of movable molds are provided, and the plurality of fixed molds and the plurality of movable molds are provided at intervals in a horizontal plane. Further, each of the fixed mold and the movable mold is provided with two working surfaces, wherein one working surface is provided with a first injection molding cavity, and another working surface is provided with a second injection molding cavity.

In summary, with the technical solution adopted, the invention has the beneficial effects that:

1. According to the invention, the copper pipes and the faucet water channel body are subjected to one-step injection molding, so that the assembly processes of secondary molding wrapping and related bulk parts are eliminated, the cost is reduced, and the production efficiency is greatly improved.
2. According to the sealing method disclosed by the invention, a sealing plug and a sealing ring are adopted, so that the overall sealing performance is improved.
3. According to the novel plastic faucet body as proposed by present invention, the core-pulling mode of the novel plastic faucet body is z-shaped offset core-pulling, and the fixed mold and the movable mold can be disposed at intervals, namely one-mold multi-cavity production, so that the production efficiency is further improved.

