Faucet shell and mold

Abstract

The utility model provides a faucet shell and a mould, the faucet shell comprises a metal outer shell and a plastic inner pipe body, the plastic inner pipe body is arranged in the metal outer shell, and the plastic inner pipe body is in close contact with the inner wall of the metal outer shell; the metal outer shell comprises a first metal outer pipe, one side of the first metal outer pipe is integrally connected with a second metal outer pipe, and the first metal outer pipe is communicated with the second metal outer pipe; the plastic inner pipe body comprises a first plastic inner pipe, one side of the first plastic inner pipe is integrally connected with a second plastic inner pipe, and the first plastic inner pipe is communicated with the second plastic inner pipe. According to the utility model, the overall stability is strong, and the overall texture and attractiveness are high; when water flows in the plastic inner pipe body, the water does not make contact with the metal outer pipe, the metal outer shell cannot be oxidized by the water, microelements cannot be released into the water, and the water pipe is green, environmentally friendly and long in service life. The plastic inner pipe can be prevented from sliding and loosening from the metal outer pipe.

Description

Technical Field

[0001] This utility model relates to the field of faucet technology, and in particular to a faucet housing and mold. Background Technology

[0002] As the water outlet pipe of a faucet, the faucet body, when used for supplying drinking water, must be made of metal or plastic that will not add pollutants to the water for the sake of water safety and hygiene. If it is made of standard metal, the cost will be high, while if it is made of plastic, the appearance will be less attractive, the texture will be poor, and the strength will be lower.

[0003] In view of this, the inventor applied for a patent CN 105345988 B on October 19, 2018, which discloses a water outlet pipe, a faucet, and a method for manufacturing the water outlet pipe. The method for manufacturing the water outlet pipe includes the following steps: preparing an outer shell made of metal; preparing an injection mold, the injection mold including a core assembly and a template assembly having a closed state and an open state; placing the outer shell into the template assembly when the template assembly is in the open state, and performing a mold closing process on the template assembly; during the mold closing process, placing the core assembly into the pipe of the outer shell until the template assembly is in the closed state, at which point the core assembly and the outer shell together form a tubular cavity; injecting molten plastic into the cavity; and cooling and solidifying the molten plastic in the cavity.

[0004] The water outlet pipe disclosed in patent CN 105345988 B consists of only one integral bent or straight pipe, and during installation, the water outlet pipe needs to be assembled onto the faucet housing. The patent CN 105345988 B has the following shortcomings: (1) Since the water needs to flow through the faucet housing before flowing out of the outlet pipe, the faucet housing may still release trace amounts of harmful elements such as lead into the water flow during the process of the water flowing through the faucet housing; (2) The faucet housing and the outlet pipe are not integrated and need to be manufactured separately, which increases the manufacturing cost and reduces the overall stability of the faucet; (3) Since both ends of the outer shell of the outlet pipe have openings, while both ends of the inner sleeve are not fixed, the inner sleeve is easy to slide outward from the openings at both ends of the outer shell during use; Assuming that a person skilled in the art designs the inner wall of the outer shell of the outlet pipe to have a concave and convex surface in order to solve this problem, since the core of the die-casting mold cannot be pulled out from the outer shell with a concave and convex surface, it will be difficult to use the core of the die-casting mold to match the inner hole of the outer shell when manufacturing the outer shell; (4) The patent CN 105345988 The manufacturing method disclosed by B can only form the inner sleeve of the water outlet pipe, but not the inner sleeve of the faucet body. Utility Model Content

[0005] The technical problem this utility model aims to solve is to address the shortcomings of the prior art by providing a faucet housing that integrates two integrally connected metal outer tubes and two integrally connected plastic inner tubes. This allows the two metal outer tubes and two plastic inner tubes to form a single unit, resulting in a faucet housing with strong overall stability, high overall texture, and aesthetic appeal. When water flows through the two plastic inner tubes, it flows within the plastic inner tubes and does not come into contact with the metal outer shell. If the metal outer shell is made of zinc alloy or aluminum alloy, it will not be oxidized by water, nor will it release trace elements into the water, making it green, environmentally friendly, and extending the product's lifespan. The two plastic inner tubes of this faucet housing can support and cooperate with each other for positioning, preventing either plastic inner tube from sliding or loosening from the metal outer tubes. The injection mold for the plastic inner tubes of this faucet housing can simultaneously form two plastic inner tubes within the two metal outer tubes. The die-casting mold for the metal outer shell of this faucet housing can simultaneously form two metal outer tubes.

[0006] To solve the above-mentioned technical problems, this utility model provides a faucet housing, including a metal outer shell and a plastic inner tube. The plastic inner tube is disposed inside the metal outer shell and is in close contact with the inner wall of the metal outer shell. The metal outer shell includes a first metal outer tube, and a second metal outer tube is integrally connected to one side of the first metal outer tube, and the first metal outer tube and the second metal outer tube are in communication. The plastic inner tube includes a first plastic inner tube, and a second plastic inner tube is integrally connected to one side of the first plastic inner tube, and the first plastic inner tube and the second plastic inner tube are in communication. The first plastic inner tube is disposed inside the first metal outer tube and is in close contact with the inner wall of the first metal outer tube. The second plastic inner tube is disposed inside the second metal outer tube and is in close contact with the inner wall of the second metal outer tube.

[0007] Preferably, the first metal outer tube is a straight tube, the second metal outer tube is an arc-shaped bend, the first plastic inner tube is a straight tube, and the second plastic inner tube is an arc-shaped bend.

[0008] Preferably, the inner wall of the first metal outer tube is provided with an annular protrusion, and one end of the first plastic inner tube is connected to the side of the annular protrusion.

[0009] Preferably, the metal outer shell is a zinc alloy outer shell or an aluminum alloy outer shell; the plastic inner tube is any one of polyphthalamide inner tube, polyoxymethylene inner tube, or polyphenylene ether inner tube.

[0010] To solve the above-mentioned technical problems, this utility model provides an injection mold specifically used for injection molding the plastic inner tube of the faucet shell, including an upper mold fixing plate, an upper template, an upper mold core, a lower mold fixing plate, a lower template, a lower mold core, a first cylinder, a first injection core puller, a second cylinder, a rack and pinion, a gear, a rotating shaft, a rotating arm, and a second injection core puller; the upper template is installed on the lower side of the upper mold fixing plate, and the upper mold core is installed inside the lower end of the upper template; the lower template is installed on the upper side of the lower mold fixing plate, and the lower mold core is installed inside the lower template; a placement cavity for placing the metal outer shell is provided between the upper mold core and the lower mold core; the first cylinder is installed on one side of the lower template, and the cylinder extension rod of the first cylinder is connected to the first injection core puller. Driven by the first cylinder, the first injection molding core can be inserted into the first metal outer tube of the metal outer shell located within the placement cavity; the second cylinder is installed on one side of the lower mold fixing plate, the cylinder extension rod of the second cylinder is connected to the rack, the rack meshes with the gear, the rotating shaft is installed in the middle of the gear, one end of the rotating arm is connected to the rotating shaft, and the other end of the rotating arm is connected to the second injection molding core. Driven by the second cylinder, the second injection molding core can be inserted into the second metal outer tube of the metal outer shell located within the placement cavity and abuts against the side of the first injection molding core; when the injection mold is closed, the first injection molding core, the second injection molding core, and the metal outer shell together form an injection cavity for molding the plastic inner tube.

[0011] To solve the above-mentioned technical problems, this utility model provides a die-casting mold specifically used for die-casting the metal outer shell of the faucet housing, including a moving template, a moving mold core, a stationary template, a stationary mold core, a push-pull rod assembly, a first die-casting core puller, a third cylinder, a transmission assembly, a second die-casting core puller, and a third die-casting core puller; the moving mold core is installed inside the lower end of the moving template, and the stationary mold core is installed inside the upper end of the stationary template; a die-casting cavity for die-casting the metal outer shell is provided between the moving mold core and the stationary mold core; the die-casting cavity includes a first cavity for die-casting a first metal outer tube and a second cavity for die-casting a second metal outer tube; the push-pull rod assembly... The pull rod assembly is installed at one end of the moving template and the stationary template. The first die-casting core puller is connected to the push-pull rod assembly. During the mold closing process, the moving template can drive the push-pull rod assembly to work and drive the first die-casting core puller to be inserted into one end of the first cavity. The third cylinder and the transmission assembly are installed at the other end of the stationary template. The cylinder extension rod of the third cylinder is connected to the transmission assembly. The second die-casting core puller and the third die-casting core puller are respectively connected to the transmission assembly. Under the driving action of the third cylinder, the transmission assembly can drive the second die-casting core puller to be inserted into the other end of the first cavity and drive the third die-casting core puller to be inserted into the second cavity.

[0012] The beneficial effects of this utility model are: (1) Since the metal outer shell of the faucet body has an integrally connected first metal outer tube and second metal outer tube, and the plastic inner tube has an integrally connected first plastic inner tube and second plastic inner tube, the first plastic inner tube is in close contact with the inner wall of the first metal outer tube, and the second plastic inner tube is in close contact with the inner wall of the second metal outer tube, on the one hand, the faucet body forms a whole, with strong stability, high texture and aesthetics; on the other hand, when the water flows through the first plastic inner tube and the second plastic inner tube, the water flows inside the plastic inner tube body and will not come into contact with the metal outer shell. If the material of the metal outer shell is zinc alloy or aluminum Alloy material, so the metal shell will not be oxidized by water, nor will it release trace elements into the water. It is green, environmentally friendly and has a long service life. On the other hand, the first plastic inner tube and the second plastic inner tube of the faucet shell are in different directions, which can support each other and cooperate to position them, preventing any plastic inner tube from sliding off the metal outer tube. (2) The plastic inner tube injection mold of the faucet shell of this utility model can realize the simultaneous injection molding of the first plastic inner tube and the second plastic inner tube with different directions in the metal shell. (3) The metal shell die casting mold of the faucet shell of this utility model can simultaneously die cast the metal shell with the first metal outer tube and the second metal outer tube. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the faucet housing of this utility model.

[0014] Figure 2 This is a cross-sectional view of the faucet housing of this utility model.

[0015] Figure 3 This diagram shows the positional relationship between the faucet housing, the first injection molding core, and the second injection molding core in the faucet housing manufacturing method of this utility model.

[0016] Figure 4 This diagram shows the positional relationship between the metal outer shell and the first, second, and third die-casting cores in the faucet shell manufacturing method of this utility model.

[0017] Figure 5 This is an overall structural diagram of the injection mold of this utility model.

[0018] Figure 6 This is one of the dispersed structural diagrams of the injection mold of this utility model.

[0019] Figure 7 This is the second diagram showing the dispersed structure of the injection mold of this utility model.

[0020] Figure 8 for Figure 7 A magnified view of part A in the middle.

[0021] Figure 9 This is an overall structural diagram of the die-casting mold of this utility model.

[0022] Figure 10 This is one of the dispersed structural diagrams of the die-casting mold of this utility model.

[0023] Figure 11 for Figure 10 A magnified view of part B in the middle section.

[0024] Figure 12 This is the second diagram showing the dispersed structure of the die-casting mold of this utility model. Detailed Implementation

[0025] The structural and working principles of this utility model will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 and Figure 2 As shown, this utility model provides a faucet housing, including a metal outer shell 100 and a plastic inner tube 200. The plastic inner tube 200 is disposed inside the metal outer shell 100 and is in close contact with the inner wall of the metal outer shell 100. The metal outer shell 100 includes a first metal outer tube 1, and a second metal outer tube 2 is integrally connected to one side of the first metal outer tube 1, and the first metal outer tube 1 and the second metal outer tube 2 are in communication. The plastic inner tube 200 includes a first plastic inner tube 3, and a second plastic inner tube 4 is integrally connected to one side of the first plastic inner tube 3, and the first plastic inner tube 3 and the second plastic inner tube 4 are in communication. The first plastic inner tube 3 is disposed inside the first metal outer tube 1 and is in close contact with the inner wall of the first metal outer tube 1. The second plastic inner tube 4 is disposed inside the second metal outer tube 2 and is in close contact with the inner wall of the second metal outer tube 2. This utility model faucet housing features two integrally connected metal outer tubes and two integrally connected plastic inner tubes, forming a unified whole. This results in a faucet housing with strong overall stability, high overall texture, and aesthetic appeal. When water flows through the two plastic inner tubes, it flows within the plastic inner tubes and does not come into contact with the metal outer shell. If the metal outer shell is made of zinc alloy or aluminum alloy, it will not be oxidized by water, nor will it release trace elements into the water, making it green, environmentally friendly, and extending the product's lifespan. The two plastic inner tubes of this utility model can support and cooperate with each other for positioning, preventing either plastic inner tube from sliding or becoming loose from the metal outer tube.

[0027] As a preferred embodiment of the faucet housing, the first metal outer tube 1 is a straight tube, the second metal outer tube 2 is an arc-shaped bend, the first plastic inner tube 3 is a straight tube, and the second plastic inner tube 4 is an arc-shaped bend. The first metal outer tube 1 and the first plastic inner tube 3 can be combined to form the main body of the faucet housing, facilitating installation on external bathroom fixtures and allowing for the installation of internal parts such as the faucet's valve core and water pipes. The second metal outer tube 2 and the second plastic inner tube 4 can be combined to form the water outlet component of the faucet housing.

[0028] As a preferred embodiment of the faucet housing, the inner wall of the first metal outer tube 1 is provided with an annular protrusion 101, and one end of the first plastic inner tube 3 is connected to the side of the annular protrusion 101.

[0029] As a preferred embodiment of the faucet housing, the metal outer casing 100 is made of zinc alloy or aluminum alloy, preferably zinc alloy. In the zinc alloy, the weight percentage of aluminum is 3.9%-4.3%, the weight percentage of magnesium is 0.03%-0.06%, and the balance is zinc and other impurities, primarily containing trace amounts of copper, iron, lead, etc. The plastic inner tube 200 is made of any one of polyphthalamide, polyoxymethylene, or polyphenylene ether.

[0030] like Figure 3 As shown, in conjunction with reference Figure 1 and Figure 2 The manufacturing method of the faucet shell of this utility model includes the following steps:

[0031] a. Prepare a metal outer casing of a faucet body, 100 mm in size;

[0032] b. Prepare an injection mold, the injection mold including a first injection core pull 5, a second injection core pull 6 and an injection template assembly having a mold closed state and a mold open state, wherein when the injection template assembly is in the mold closed state, a placement cavity for placing the metal outer shell 100 is formed inside the injection template assembly.

[0033] c. When the injection molding template assembly is in the open mold state, the metal outer shell 100 is placed into the placement cavity of the injection molding template assembly, and the injection molding template assembly is closed. During the mold closing process, the first injection molding core 5 is inserted into the first metal outer tube 1 of the metal outer shell 100, and the second injection molding core 6 is inserted into the second metal outer tube 2 of the metal outer shell 100, and the end of the second injection molding core 6 abuts against the side of the first injection molding core 5. After the injection molding template assembly is closed, the first injection molding core 5, the second injection molding core 6 and the metal outer shell 100 together form an injection cavity for molding the plastic inner tube 200.

[0034] d. Inject molten plastic into the injection mold cavity, wherein the melting point of the plastic is less than the melting point of the metal outer shell by 100°.

[0035] e. Cool and solidify the molten plastic in the injection mold cavity to form a plastic inner tube body 200 having a first plastic inner tube 3 and a second plastic inner tube 4;

[0036] f. The injection mold assembly is opened. During the mold opening process, the first injection core puller 5 is pulled out from the first plastic inner tube 3 of the plastic inner tube body, and the second injection core puller 6 is pulled out from the second plastic inner tube 4 of the plastic inner tube body.

[0037] g. Remove the molded faucet body from the injection molding template assembly.

[0038] like Figure 4 As shown, in conjunction with reference Figures 1-2 The manufacturing method of the faucet housing further includes the step of die-casting the metal outer casing 100, comprising:

[0039] i. Prepare a die casting mold, the die casting mold including a first die casting core puller 7, a second die casting core puller 8, a third die casting core puller 9 and a die casting template assembly having a mold closed state and a mold open state. When the die casting template assembly is in the mold closed state, a die casting cavity for die casting a metal outer shell 100 is formed inside the die casting template assembly. The die casting cavity includes a first cavity for die casting a first metal outer tube 1 and a second cavity for die casting a second metal outer tube 2.

[0040] ii. The die-casting template assembly is closed. During the mold closing process, the first die-casting core 7 is inserted into one end of the first cavity of the die-casting cavity, the second die-casting core 8 is inserted into the other end of the first cavity of the die-casting cavity, and the ends of the first die-casting core 7 and the second die-casting core 8 abut against each other. The third die-casting core 9 is inserted into the second cavity of the die-casting cavity, and the end of the third die-casting core 9 abuts against the side of the first die-casting core 7.

[0041] iii. Inject molten metal material into the die-casting cavity;

[0042] iv. Cool and solidify the molten metal material in the die-casting cavity to form a metal outer shell 100 having a first metal outer tube 1 and a second metal outer tube 2;

[0043] v. The die-casting template assembly is opened. During the mold opening process, the first die-casting core puller 7 is pulled out from the first metal outer tube 1 of the metal outer shell 100, the second die-casting core puller 8 is pulled out from the first metal outer tube 1 of the metal outer shell 100, and the third injection molding core puller is pulled out from the second metal outer tube 2 of the metal outer shell 100.

[0044] ⅵ. Remove the formed metal outer shell 100 from the die-casting template assembly.

[0045] like Figures 5-8 As shown, in conjunction with reference Figures 1-3 This utility model provides an injection mold specifically for injection molding the plastic inner tube 200 of the faucet shell, including an upper mold fixing plate 10, an upper template 11, an upper mold core 12, a lower mold fixing plate 13, a lower template 14, a lower mold core 15, a first cylinder 16, a first injection core puller 5, a second cylinder 17, a rack and pinion 18, a gear 19, a rotating shaft 20, a rotating arm 21, and a second injection core puller 6; the upper template 11 is installed on the lower side of the upper mold fixing plate 10, and the upper mold core 12 is installed inside the lower end of the upper template 11; the lower template 14 is installed on the upper side of the lower mold fixing plate 13, and the lower mold core 15 is installed inside the lower template 14, with a placement cavity 22 for placing the metal outer shell 100 between the upper mold core 12 and the lower mold core 15; the first cylinder 16 is installed on one side of the lower template 14, and the cylinder extension rod of the first cylinder 16 is connected to the first injection core puller 5. Driven by cylinder 16, the first injection core puller 5 can be inserted into the first metal outer tube 1 of the metal outer shell 100 located in the placement cavity 22; the second cylinder 17 is installed on one side of the lower mold fixing plate 13, the cylinder extension rod of the second cylinder 17 is connected to the rack 18, the rack 18 meshes with the gear 19, the rotating shaft 20 is installed in the middle of the gear 19, one end of the rotating arm 21 is connected to the rotating shaft 20, and the other end of the rotating arm 21 is connected to the second injection core puller 6. Driven by the second cylinder 17, the second injection core puller 6 can be inserted into the second metal outer tube 2 of the metal outer shell 100 located in the placement cavity 22 and abut against the side of the first injection core puller 5; when the injection mold is closed, the first injection core puller 5, the second injection core puller 6 and the metal outer shell 100 together form an injection cavity for molding the plastic inner tube 200.

[0046] like Figures 5-8 As shown, the first injection molding core puller 5 is a straight injection molding core puller, and the second injection molding core puller 6 is an arc-shaped injection molding core puller.

[0047] like Figures 5-8As shown, the injection mold further includes a base plate 23, side support plates 24, and a first ejector pin assembly; two side support plates 24 are provided, and the two side support plates 24 are installed on both ends of the base plate 23, and the lower mold fixing plate 13 is installed on the side support plates 24; the first ejector pin assembly is movably installed between the two side support plates 24, and the first ejector pin assembly includes a first ejector plate fixing plate 25, a first ejector plate 26, and a first ejector pin 27. The first ejector plate 26 is installed on the first ejector plate fixing plate 25, and the first ejector pin 27 is installed on the first ejector plate 26. One end of the first ejector pin 27 extends movably into the placement cavity 22.

[0048] like Figures 9-12 As shown, in conjunction with reference Figure 1 , Figure 2 and Figure 4 This utility model provides a die-casting mold specifically for die-casting the metal outer shell 100 of the faucet housing, including a moving template 28, a moving mold core 29, a stationary template 30, a stationary mold core 31, a push-pull rod assembly, a first die-casting core puller 7, a third cylinder 32, a transmission assembly, a second die-casting core puller 8, and a third die-casting core puller 9; the moving mold core 29 is installed inside the lower end of the moving template 28, and the stationary mold core 31 is installed inside the upper end of the stationary template 30. A die-casting cavity 33 for die-casting the metal outer shell 100 is provided between the moving mold core 29 and the stationary mold core 31. The die-casting cavity 33 includes a first cavity portion 331 for die-casting the first metal outer tube 1 and a second cavity portion 332 for die-casting the second metal outer tube 2; The push-pull rod assembly is installed at one end of the moving template 28 and the stationary template 30. The first die-casting core puller 7 is connected to the push-pull rod assembly. During the mold closing process, the moving template 28 can drive the push-pull rod assembly to work and drive the first die-casting core puller 7 to be inserted into one end of the first cavity 331. The third cylinder 32 and the transmission assembly are installed at the other end of the stationary template 30. The cylinder extension rod of the third cylinder 32 is connected to the transmission assembly. The second die-casting core puller 8 and the third die-casting core puller 9 are respectively connected to the transmission assembly. Under the driving action of the third cylinder 32, the second die-casting core puller 8 can be driven to be inserted into the other end of the first cavity 331 through the transmission assembly, and the third die-casting core puller 9 can be driven to be inserted into the second cavity 332.

[0049] like Figures 9-12As shown, the push-pull rod assembly includes a first slide rail 34, a first slider 35, and a push-pull rod 36. The first slide rail 34 is installed inside one end of the static template 30, and the first slider 35 is slidably installed on the first slide rail 34. The first die-casting core puller 7 is connected to the first slider 35. One end of the moving template 28 is provided with an oblique fixing hole 281. The upper end of the push-pull rod 36 is installed in the fixing hole 281. The first slider 35 is provided with an oblique sliding hole 351. The lower end of the push-pull rod 36 moves through the sliding hole 351. When the push-pull rod 36 moves up and down, it can drive the first slider 35 to move back and forth along the first slide rail 34.

[0050] like Figures 9-12 As shown, the transmission assembly includes a second slide rail 37, a second slider 38, an arc-shaped slide rail 39, a third slider 40, and a connecting rod 41. The second slide rail 37 is installed at the other end of the stationary template 30, and the second slider 38 is slidably installed on the second slide rail 37. The third cylinder 32 is fixed to one end of the second slide rail 37, and the cylinder extension rod of the third cylinder 32 is connected to the second slider 38. The second die-casting core puller 8 is connected to one end of the second slider 38. The arc-shaped slide rail 39 is installed inside the other end of the stationary template 30, and the third slider 40 is slidably installed on the arc-shaped slide rail 39. One end of the connecting rod 41 is hinged to the other end of the second slider 38, and the other end of the connecting rod 41 is hinged to the third slider 40. The second die-casting core puller 8 is connected to the third slider 40.

[0051] like Figures 9-12 As shown, the first die-casting core puller 7 and the second die-casting core puller 8 are straight die-casting core pullers, and the third die-casting core puller 9 is an arc-shaped die-casting core puller.

[0052] like Figures 9-12 As shown, the injection mold further includes a support base plate 42, a stationary mold support plate 43, and a second ejector assembly; there are two stationary mold support plates 43, which are installed on the support base plate 42, and the stationary mold plate 30 is installed on the stationary mold support plates 43; the second ejector assembly is movably installed between the two stationary mold support plates 43, and the second ejector assembly includes a second ejector plate fixing plate 44, a second ejector plate 45, and a second ejector 46. The second ejector plate 45 is installed on the second ejector plate fixing plate 44, and the second ejector 46 is installed on the second ejector plate 45. One end of the second ejector 46 extends movably into the die-casting cavity 33.

[0053] The above description is merely a preferred embodiment of this utility model. Any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.

Claims

1. A faucet housing, characterized in that: The device comprises a metal outer shell and a plastic inner tube. The plastic inner tube is disposed within the metal outer shell and is in close contact with the inner wall of the metal outer shell. The metal outer shell includes a first metal outer tube, and a second metal outer tube is integrally connected to one side of the first metal outer tube, and the first metal outer tube and the second metal outer tube are in communication. The plastic inner tube includes a first plastic inner tube, and a second plastic inner tube is integrally connected to one side of the first plastic inner tube, and the first plastic inner tube and the second plastic inner tube are in communication. The first plastic inner tube is disposed within the first metal outer tube and is in close contact with the inner wall of the first metal outer tube. The second plastic inner tube is disposed within the second metal outer tube and is in close contact with the inner wall of the second metal outer tube.

2. The faucet housing according to claim 1, characterized in that: The first metal outer tube is a straight tube, the second metal outer tube is an arc-shaped bend, the first plastic inner tube is a straight tube, and the second plastic inner tube is an arc-shaped bend.

3. The faucet housing according to claim 2, characterized in that: The inner wall of the first metal outer tube is provided with an annular protrusion, and one end of the first plastic inner tube is connected to the side of the annular protrusion.

4. The faucet housing according to claim 1, characterized in that: The metal outer shell is a zinc alloy outer shell or an aluminum alloy outer shell; the plastic inner tube is any one of polyphthalamide inner tube, polyoxymethylene inner tube, or polyphenylene ether inner tube.

5. An injection mold specifically used for injection molding the plastic inner tube of the faucet housing according to any one of claims 1-4, characterized in that: The system includes an upper mold fixing plate, an upper template, an upper mold core, a lower mold fixing plate, a lower template, a lower mold core, a first cylinder, a first injection molding core puller, a second cylinder, a rack and pinion, a gear, a rotating shaft, a rotating arm, and a second injection molding core puller. The upper template is installed on the lower side of the upper mold fixing plate, and the upper mold core is installed inside the lower end of the upper template. The lower template is installed on the upper side of the lower mold fixing plate, and the lower mold core is installed inside the lower template. A placement cavity for placing the metal outer shell is provided between the upper mold core and the lower mold core. The first cylinder is installed on one side of the lower template, and the cylinder extension rod of the first cylinder is connected to the first injection molding core puller. Driven by the first cylinder, the first injection molding core can be inserted into the first metal outer tube of the metal outer shell located within the placement cavity; the second cylinder is installed on one side of the lower mold fixing plate, the cylinder extension rod of the second cylinder is connected to the rack, the rack meshes with the gear, the rotating shaft is installed in the middle of the gear, one end of the rotating arm is connected to the rotating shaft, and the other end of the rotating arm is connected to the second injection molding core. Driven by the second cylinder, the second injection molding core can be inserted into the second metal outer tube of the metal outer shell located within the placement cavity and abuts against the side of the first injection molding core; when the injection mold is closed, the first injection molding core, the second injection molding core, and the metal outer shell together form an injection cavity for molding the plastic inner tube.

6. The injection mold according to claim 5, characterized in that: The first injection molding core pull is a straight injection molding core pull, and the second injection molding core pull is an arc-shaped injection molding core pull; the injection mold also includes a base plate, side support plates, and a first ejector pin assembly; there are two side support plates, which are installed on both ends of the base plate, and the lower mold fixing plate is installed on the side support plates; the first ejector pin assembly is movably installed between the two side support plates, and the first ejector pin assembly includes a first ejector pin plate fixing plate, a first ejector pin plate, and a first ejector pin, the first ejector pin plate is installed on the first ejector pin plate, the first ejector pin is installed on the first ejector pin plate, and one end of the first ejector pin extends movably into the placement cavity.

7. A die-casting mold specifically used for die-casting the metal outer shell of the faucet housing according to any one of claims 1-4, characterized in that: The system includes a moving template, a moving mold core, a stationary template, a stationary mold core, a push-pull rod assembly, a first die-casting core puller, a third cylinder, a transmission assembly, a second die-casting core puller, and a third die-casting core puller. The moving mold core is installed inside the lower end of the moving template, and the stationary mold core is installed inside the upper end of the stationary template. A die-casting cavity for die-casting a metal outer shell is provided between the moving mold core and the stationary mold core. The die-casting cavity includes a first cavity for die-casting a first metal outer tube and a second cavity for die-casting a second metal outer tube. The push-pull rod assembly is installed at one end of the moving template and the stationary template. The first die-casting core puller... The die-casting core puller is connected to the push-pull rod assembly. During the mold closing process, the moving template can drive the push-pull rod assembly to work and drive the first die-casting core puller to be inserted into one end of the first cavity. The third cylinder and the transmission assembly are installed at the other end of the stationary template. The cylinder extension rod of the third cylinder is connected to the transmission assembly. The second and third die-casting core pullers are respectively connected to the transmission assembly. Under the driving action of the third cylinder, the transmission assembly can drive the second die-casting core puller to be inserted into the other end of the first cavity and drive the third die-casting core puller to be inserted into the second cavity.

8. The die-casting mold according to claim 7, characterized in that: The push-pull rod assembly includes a first slide rail, a first slider, and a push-pull rod. The first slide rail is installed inside one end of the stationary template, and the first slider is slidably installed on the first slide rail. The first die-casting core is connected to the first slider. One end of the moving template is provided with an oblique fixing hole, and the upper end of the push-pull rod is installed in the fixing hole. The first slider is provided with an oblique sliding hole, and the lower end of the push-pull rod moves through the sliding hole. When the push-pull rod moves up and down, it can drive the first slider to move back and forth along the first slide rail.

9. The die-casting mold according to claim 7, characterized in that: The transmission assembly includes a second slide rail, a second slider, an arc-shaped slide rail, a third slider, and a connecting rod. The second slide rail is installed at the other end of the stationary template, and the second slider is slidably installed on the second slide rail. The third cylinder is fixed to one end of the second slide rail, and the cylinder extension rod of the third cylinder is connected to the second slider. The second die-casting core is connected to one end of the second slider. The arc-shaped slide rail is installed inside the other end of the stationary template, and the third slider is slidably installed on the arc-shaped slide rail. One end of the connecting rod is hinged to the other end of the second slider, and the other end of the connecting rod is hinged to the third slider. The second die-casting core is connected to the third slider.

10. The injection mold according to claim 7, characterized in that: The first and second die-casting core pullers are straight die-casting core pullers, and the third die-casting core puller is an arc-shaped die-casting core puller; the injection mold also includes a support base plate, a stationary mold support plate, and a second ejector assembly; there are two stationary mold support plates, which are installed on the support base plate, and the stationary mold plate is installed on the stationary mold support plates; the second ejector assembly is movably installed between the two stationary mold support plates, and the second ejector assembly includes a second ejector plate fixing plate, a second ejector plate, and a second ejector pin, the second ejector plate is installed on the second ejector plate fixing plate, the second ejector pin is installed on the second ejector plate, and one end of the second ejector pin extends movably into the die-casting cavity.

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