Faucet and manufacturing method therefor

Abstract

A manufacturing method for a faucet, comprising: (1) manufacturing a liner having a cavity; (2) injecting a liner filler into the cavity of the liner, to implement filling and molding within the cavity; and (3) placing the liner filled with the liner filler into a mold for high-pressure casting, and after cooling and molding, removing the liner filler in the cavity, thereby obtaining a faucet, wherein the liner filler is one or more of resin, silica gel, a foam material, resin sand, steel balls, cement, a wood chip mixture, flour, wax, ice, and dry ice, and the raw material for manufacturing the liner is at least one of stainless steel, titanium alloy, copper, and aluminum. The manufacturing method involves a simple process and has low industrial production difficulty. The faucet manufactured by the manufacturing method can be in direct contact with water, and the liner is continuous and smooth. The product has a regular appearance and high consistency.

Description

A faucet and a preparation method thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of faucets, in particular to a faucet and a preparation method thereof. BACKGROUND

[0002] Metal faucets account for a certain proportion in the existing market, which are mainly prepared by traditional low-pressure casting technology, specifically, after the sand core is formed, the faucet is formed by injecting the casting metal alloy into the cavity under low pressure, and then the sand core is flowed away to form the water space in the faucet, wherein the traditional sand core is mainly resin material, and the pressure resistance is 60-80 kg / cm 2 , which cannot use high-pressure casting process, and the preparation process mainly has the following disadvantages: first, low efficiency; second, irregular product appearance, poor consistency, rough product surface, and easy to form sand holes; in addition, the inner wall of the product is rough, and the residues of the sand core cannot be completely cleaned, leaving residues on the inner wall, causing the residues to fall off during electroplating, causing pollution of the electroplating tank. In addition, zinc alloy and aluminum alloy metal faucets cannot be directly contacted with flowing water, and plastic pipes are often provided in the inner wall of the faucet to provide a water flow channel. Due to the limited biodegradability of the plastic pipe, the appearance of the faucet is highly limited, the valve core structure is complex, and the cost is increased.

[0003] The applicant provides a faucet and a preparation method thereof and a mold for producing the faucet in CN115464116A, which uses an inner liner with a hollow cavity to replace the filling core in the prior art. The inner liner supports the inner liner by injecting filling oil, and after molding, the filling oil is discharged to obtain a faucet with a smooth cavity. The method has high production efficiency, saves materials, and produces a faucet with uniform wall thickness. However, the preparation method requires high technology and cannot be industrialized, so the applicant has improved it to reduce the technical difficulty of the faucet in the process of production. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a faucet preparation process with simple preparation process and low difficulty. The inner liner of the faucet prepared by the improved preparation method is made of stainless steel material and can be directly contacted with water. The inner liner is continuous and smooth, and the appearance is regular and consistent.

[0005] To solve the above technical problems, the first aspect of the present application provides a preparation method of a faucet, comprising:

[0006] (1) preparing an inner liner with a cavity;

[0007] (2) injecting an inner container filler into the cavity of the inner container, and filling and forming in the cavity;

[0008] (3) placing the inner container with the injected inner container filler into a mold, and performing high-pressure casting, removing the inner container filler in the cavity after cooling and forming, to obtain the faucet;

[0009] The inner container filler is one or more of resin, silica gel, foaming material, resin sand, steel ball, cement, wood chip mixture, flour, wax, ice, and dry ice; and the raw material for preparing the inner container is at least one of stainless steel, titanium alloy, copper, and aluminum.

[0010] As an improvement of the above scheme, the inner container with the added inner container filler has a compressive strength of 200-600 kg / cm 2 .

[0011] As an improvement of the above scheme, the inner container is prepared by stamping, drawing, bulging, welding, and numerical control processing, and the thickness of the inner container is 0.1-1 mm.

[0012] As an improvement of the above scheme, the inner container is made of stainless steel, and when the wall thickness of the inner container is 0.5 mm, the compressive strength is 70-90 kg / cm 2 .

[0013] The chemical composition of the stainless steel, by mass percentage, is C≤0.08%, Cr=16.00-20.00%, Ni=8.00-15.00%, Si≤1.00%, Mn≤2.00%, and P≤0.045%.

[0014] As an improvement of the above scheme, the inner container filler is pressed and formed under the action of pressure after entering the inner container, the pressure is 0.2-0.6 MPa, and the particle size range of the inner container filler is 150-900 μm.

[0015] As an improvement of the above scheme, the inner container filler is resin sand, and the strength of the resin sand after pressing is 8-80 kg / cm 2 .

[0016] The volume ratio of the inner container filler after being pressed and formed in the cavity is 95-98%.

[0017] As an improvement of the above scheme, the proportion of resin in the resin sand is 0.4-0.9 wt%, and the fluidity of the resin sand is 25-30°.

[0018] In the resin sand, the particles with a size of 250-350 μm account for 5-7%, the particles with a size of 400-450 μm account for 69-73%, and the particles with a size of 550-650 μm account for 20-24%.

[0019] The melting point of the resin sand is 105-115℃.

[0020] As an improvement of the above-mentioned scheme, the liner filler is resin sand and silica gel, the weight ratio of the resin sand and silica gel is (1-2):1, the particle size of the silica gel is 150-500μm, and the Shore hardness is 50-90;

[0021] The particles with a size of 250-350μm account for 5-7%, the particles with a size of 400-450μm account for 69-73%, and the particles with a size of 550-650μm account for 20-24% in the resin sand; and the melting point of the resin sand is 105-115℃.

[0022] As an improvement of the above-mentioned scheme, the liner filled with the liner filler is placed in a mold, and a liquid or semi-liquid metal is injected to form an outer layer by high-pressure casting;

[0023] The injection pressure during the high-pressure casting is 20-100Mpa, the injection time is 0.01s-0.5s, and the forming time is 0.01s-0.5s.

[0024] As an improvement of the above-mentioned scheme, the liner filled with the liner filler is placed in a mold, and a liquid or semi-liquid alloy is injected to form an alloy outer layer by high-pressure casting;

[0025] The alloy is a zinc alloy and / or an aluminum alloy.

[0026] The second aspect of the present application also provides a faucet, which is prepared by the above-mentioned preparation method, and comprises a liner having a cavity with a continuous and smooth surface.

[0027] As an improvement of the above-mentioned scheme, the faucet comprises a liner and an alloy outer layer covering the outside of the liner;

[0028] The alloy outer layer is prepared by injecting a liner filler into the cavity and filling forming, then injecting a liquid or semi-liquid alloy outside the liner, and then high-pressure casting to make the alloy cover the outside of the liner.

[0029] As an improvement of the above-mentioned scheme, the faucet comprises a liner, a first alloy outer layer covering the outside of the liner, and a second alloy outer layer covering the outside of the first alloy outer layer;

[0030] The first alloy outer layer is prepared by injecting a liner filler into the cavity and filling forming, then injecting a liquid or semi-liquid alloy outside the liner, and then high-pressure casting to make the alloy cover the outside of the liner;

[0031] The second alloy outer layer is prepared by injecting liquid or semi-liquid alloy outside the first alloy outer layer, and then wrapping the alloy outside the first alloy outer layer through second high-pressure casting.

[0032] As an improvement of the above scheme, the injection pressure of the first high-pressure casting is 30-70 Mpa, the injection time is 0.05-0.25 s, and the forming time is 0.01-0.2 s.

[0033] The second alloy outer layer is aluminum alloy, the injection pressure of the second high-pressure casting is 70-100 Mpa, the injection time is 0.1-0.5 s, and the forming time is 0.1-0.5 s.

[0034] The present application has the following advantages:

[0035] In the present application, the inner container with cavity is prepared first, then the inner container filler is injected into the cavity of the inner container and filled and formed in the cavity, then the inner container with the inner container filler is placed in a mold for casting, and the inner container filler in the cavity is removed after cooling and forming, thus obtaining the faucet. The operation of vacuumizing is avoided, the difficulty of industrial production is reduced, and the preparation process is simplified and efficient. In addition, the compression strength of the inner container is effectively improved by injecting the inner container filler into the inner container, so that the faucet can be prepared by using the high-pressure casting process. The setting of the inner container enables the faucet to directly contact with water, avoids the setting of the conventional plastic pipe, simplifies the valve core structure of the faucet, and reduces the cost. The inner container of the faucet prepared by using the improved preparation method is continuous and smooth, has regular appearance, and has high consistency. DETAILED DESCRIPTION

[0036] To make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail with specific examples.

[0037] To solve the above problems, the present application provides a preparation method of faucet, comprising:

[0038] (1) preparing an inner container with cavity;

[0039] (2) injecting an inner container filler into the cavity of the inner container and filling and forming in the cavity;

[0040] (3) placing the inner container with the inner container filler in a mold for high-pressure casting, removing the inner container filler in the cavity after cooling and forming, thus obtaining the faucet.

[0041] The traditional water faucet adopts resin sand core in the preparation process, which is easily scattered by high pressure, and irregular deformation occurs in the inner wall and appearance, resulting in poor consistency of the product. In the present application, the vacuum operation is avoided, and the inner liner filler can be directly added into the inner liner, which reduces the difficulty of the preparation process and improves the preparation efficiency. In addition, by preparing the inner liner with a cavity and injecting the inner liner filler into the inner liner, the pressure resistance of the inner liner can be increased, which is suitable for high pressure casting process, and the inner liner can be directly contacted with water, avoiding the setting of plastic pipeline in the inner wall of the water faucet, which helps to simplify the structure of the water faucet valve core, thereby reducing the production cost. The water faucet inner liner prepared by the improved preparation method is continuous and smooth, the appearance is regular, and the consistency is high.

[0042] Preferably, the pressure resistance of the inner liner with the inner liner filler is 200-600 kg / cm 2 .

[0043] Preferably, in step (1), the preparation raw material of the inner liner is at least one of stainless steel, titanium alloy, copper and aluminum.

[0044] Further, when the wall thickness of the stainless steel is 0.5 mm, the pressure resistance is 70-90 kg / cm 2 . It should be noted that the pressure resistance of the stainless steel is tested by taking a standard block of stainless steel with a size of 11.8 mm (high) * 22 mm (wide) * 70 mm (long) * 0.5 mm (wall thickness) as a sample. The chemical composition of the stainless steel is as follows: C≤0.08%, Cr=16.00-20.00%, Ni=8.00-15.00%, Si≤1.00%, Mn≤2.00%, P≤0.045%, which can ensure that the inner liner can be directly contacted with water under the premise of ensuring the strength of the inner liner, avoiding the precipitation of metal elements during long-term use and affecting the use. The content of C, Si, Mn and Ni will obviously affect the strength and corrosion resistance of the obtained inner liner, and then affect the safety and service life. More preferably, the stainless steel meets the European standard and / or American standard for stainless steel materials for drinking water, and the stainless steel includes but is not limited to 304, 304L, 306, 316, 316L and the like.

[0045] Preferably, the inner liner is prepared by stamping, stretching, bulging, welding and numerical control processing process, and the thickness of the inner liner is 0.1-1 mm. If the thickness of the inner liner is too thin, the strength will be reduced, and deformation will occur during casting, resulting in uneven wall thickness of the obtained water faucet. If the thickness of the inner liner is too thick, it will increase the difficulty of the inner liner filler in the inner liner, and will increase the difficulty of the preparation of the inner liner, reducing the production efficiency. More preferably, the thickness of the inner liner is 0.3-1 mm.

[0046] The inner liner in the present application is only improved in raw material and thickness, and the strength thereof cannot bear higher pressure, i.e. the high-pressure casting process cannot be used to prepare the faucet. Therefore, the inner liner filler is added into the inner liner, and the inner liner filler is pressed and formed under pressure after entering the inner liner, and the filling and forming in the cavity is combined with the inner liner, which can effectively improve the compression strength of the inner liner and greatly improve the compression resistance thereof.

[0047] Preferably, in step (2), the inner liner filler is in powder form, the particle size of the inner liner filler is 150-900 μm, the inner liner filler is pressed and formed under pressure after entering the inner liner, the pressure during the pressing and forming is 0.2-0.6 Mpa, and the surface of the resin sand after the pressing and forming is ensured to have no loose structure. If the particle size of the inner liner filler is too large, the pores between the inner liner fillers will be too large, and the pressing and forming cannot be performed, or a too large pressure is required for the pressing and forming, and the too large pressure can cause the deformation of the inner liner, but if the particle size of the inner liner filler is too small, the powder flowability is poor, which can cause the thickness after the pressing and forming to be uneven, and the cavity cannot be completely filled, etc. Moreover, the smoothness of the inner wall of the inner liner and the uniformity of the thickness can be ensured by controlling the pressure during the pressing and forming.

[0048] Further, the inner liner filler is one or more of resin, silica gel, foaming material, resin sand, steel ball, cement, wood chip mixture, flour, wax, ice, dry ice. The inner liner filler can also be other conventional powders, including but not limited to gypsum powder, rice powder, starch, iron powder, copper powder, aluminum powder, and any combination thereof. Specifically, one or more of resin sand, resin, silica gel, foaming material, steel ball, cement, wood chip, flour, wax can be uniformly mixed, and then pressed and formed under pressure to obtain the mixture as the inner liner filler, which can reasonably adjust the compression resistance of the inner liner during the filling and high-pressure casting, meet the casting conditions in a larger pressure range, and also adjust the flowability, temperature resistance stability, etc. of the inner liner filler. When ice or dry ice is selected as the inner liner filler, the high-pressure casting time is short, which can ensure that the ice or dry ice does not melt, thereby providing sufficient compression resistance, and in special cases, a heat insulation material can also be provided.

[0049] Further, the present application can adopt the way of high frequency vibration to remove the inner liner filler in the cavity, the removal method is simple and efficient, further improves the preparation efficiency, and the inner liner filler in the cavity can be completely removed, effectively avoids the pollution of the electroplating solution in the later electroplating cylinder, and can ensure that the structure of the faucet is not affected, and the deformation and damage of the elbow of the faucet are avoided. Of course, the inner liner filler in the cavity can also be removed by mechanical processing, such as manual tool removal, mechanical milling, drilling and grinding, which are not limited in the present application.

[0050] In some preferred and specific embodiments, the inner liner filler is resin sand, the strength of the resin sand after pressing is 8-80 kg / cm 2 , and the volume ratio of the inner liner filler in the cavity after pressing is 95-98%. The inner liner filler with the above compressive strength and the inner liner with a specific thickness can improve the compressive strength of the inner liner by more than 3 times compared with the single inner liner or the pressed resin sand, can withstand higher pressure, and can be completely removed by high frequency vibration treatment when removed later, and the treatment method is simple.

[0051] Further, the proportion of resin in the resin sand is 0.4-0.9wt%, the fluidity of the resin sand is 25-30°, the strength and viscosity of the resin sand as the inner liner filler can be considered at the same time, the particles of 250-350 μm in the resin sand account for 5-7%, the particles of 400-450 μm account for 69-73%, and the particles of 550-650 μm account for 20-24%, more preferably, the particles of 300 μm in the resin sand account for 5-7%, the particles of 425 μm account for 69-73%, and the particles of 600 μm account for 20-24%, the melting point of the resin sand is 105-115℃, and the hardening time of the resin sand is about 70s, which is beneficial to form a dense inner liner filler during pressing, and further improves the compressive strength of the resin sand inner liner filler to 10 kg / cm 2 The above further improves the compressive capacity of the inner liner, and the compressive strength reaches 200-600 kg / cm 2 , which is suitable for higher pressure casting. The content of resin in the resin sand or the refinement of the particles of the resin sand is beneficial to increase the compressive strength of the resin sand filled in the stainless steel inner liner, but it will lead to the difficulty of sand removal. If the conventional resin sand material is used as the inner liner filler and filled in the stainless steel inner liner, the compressive strength of the stainless steel inner liner cannot be greatly improved, and the high pressure casting process cannot be used to prepare the faucet, which will also lead to the rough inner wall of the prepared faucet and poor product consistency.

[0052] In some preferred and specific embodiments, the inner liner filler is resin sand and silica gel, and the weight ratio of the resin sand and silica gel is (1-2):1, the particle size of the silica gel is 150-500 μm, and the Shore hardness is 50-90. By mixing the resin sand and silica gel in a specific ratio and then using the mixture as the inner liner filler, the resin sand and silica gel can work together to improve the flowability of the inner liner filler, and under the action of pressure, a dense and stable filling body is formed. Subsequently, when the filling body is combined with the stainless steel inner liner, the compressive strength of the stainless steel inner liner can be effectively improved, and the inner wall is continuous and smooth.

[0053] More preferably, the particle size of the silica gel is 150-250 μm, the Shore hardness is 70-90, and the resin sand is further mixed with 5-7% of particles with a size of 250-350 μm, 69-73% of particles with a size of 400-450 μm, and 20-24% of particles with a size of 550-650 μm. After the resin sand and silica gel are mixed and filled into the stainless steel inner liner, the combination performance of the two is good, the flowability is suitable, the compressive strength of the stainless steel inner liner can be greatly improved, and then the preparation of the faucet by using the high-pressure casting process can be realized. The inner wall of the faucet prepared is continuous and smooth, and the product consistency is good. Moreover, it can also ensure easy removal in the later stage, and the inner liner filler in the cavity can be removed by high-frequency vibration or other mechanical processing methods.

[0054] More preferably, the melting point of the resin sand is 105-115°C, and the hardening time of the resin sand is about 70s, which is beneficial to the formation of a dense inner liner filler during pressing, and further makes the compressive strength of the resin sand inner liner filler reach 10 kg / cm 2 The above, and further better improve the compressive capacity of the inner liner, so that the compressive strength reaches 200-600 kg / cm 2 , which is suitable for casting under higher pressure conditions.

[0055] Preferably, in step (3), the casting is performed by using a high-pressure casting method. Specifically, the inner liner filled with the inner liner filler is placed in a mold, and then liquid or semi-liquid metal is injected to perform high-pressure casting to form an outer layer. When the inner liner filled with the inner liner filler is placed in the mold, a forming space is left between the cores of the mold, and then liquid or semi-liquid metal is injected into the forming space to perform high-pressure casting. After cooling, an outer layer wrapped around the outer side of the inner liner can be obtained. Optionally, when the high-pressure casting is performed, the injection pressure is 20-100 MPa, the injection time is 0.01s-0.5s, and the forming time is 0.01s-0.5s; more preferably, the injection pressure is 20-55 MPa.

[0056] Further, the inner container filled with the inner container filler is placed in a mold, high-pressure casting is performed by injecting a liquid or semi-liquid alloy to form an alloy outer layer, and the material of the alloy outer layer can be a zinc alloy and / or an aluminum alloy, which can provide the faucet with higher compression resistance and mechanical strength, wherein the zinc alloy has low cost and excellent casting performance, can be pressure cast into complex shapes and thin-walled structures to meet the diversified design needs, and the aluminum alloy has good corrosion resistance, is environmentally friendly and safe, and can significantly reduce the overall weight of the faucet, which is suitable for modern lightweight design needs.

[0057] The second aspect of the present application also provides a faucet prepared by the above preparation method, wherein the faucet comprises an inner container, and the inner container has a cavity with a continuous smooth surface.

[0058] Further, the faucet comprises an inner container and an alloy outer layer wrapped outside the inner container, wherein the inner container has a cavity for water flow to ensure water quality, health and safety, and the alloy outer layer is used to provide mechanical strength and compression resistance to support the overall structural stability, which together constitute the protection system of the faucet. The wall thickness of the inner container is 0.1-1 mm, and the thickness of the alloy outer layer can be reasonably adjusted according to actual needs.

[0059] Further, the alloy outer layer is prepared by injecting an inner container filler into the cavity and filling it to form, then injecting a liquid or semi-liquid alloy outside the inner container, and then high-pressure casting the alloy to wrap the outer side of the inner container. The faucet prepared by the one-piece molding process in the present application replaces the assembly process of traditional plastic pipes, has high efficiency, and the inner container can directly contact with water to improve water quality, wherein the inner container provides sufficient support for the formation of the alloy outer layer, facilitating the formation of a faucet with uniform wall thickness and high consistency.

[0060] Further, the faucet comprises an inner container, a first alloy outer layer wrapped outside the inner container, and a second alloy outer layer wrapped outside the first alloy outer layer; the first alloy outer layer is prepared by injecting an inner container filler into the cavity and filling it to form, then injecting a liquid or semi-liquid alloy outside the inner container, and then high-pressure casting the alloy to wrap the outer side of the inner container; and the second alloy outer layer is prepared by injecting a liquid or semi-liquid alloy outside the first alloy outer layer, and then high-pressure casting the alloy to wrap the outer side of the first alloy outer layer.

[0061] In some specific and preferred embodiments, the first alloy outer layer is a zinc alloy, and the second alloy outer layer is an aluminum alloy. The zinc alloy serves as a plastic buffer layer to absorb impact energy, and the aluminum alloy layer provides a high-strength outer shell for the faucet, improving the corrosion resistance of the faucet. The injection pressure of the first high-pressure casting is 30-70 MPa, the injection time is 0.05-0.25 s, and the forming time is 0.01-0.2 s, so that the zinc alloy fully infiltrates the surface of the inner container and rapidly forms on the inner container. The injection pressure of the second high-pressure casting is 70-100 MPa, the injection time is 0.1-0.5 s, and the forming time is 0.1-0.5 s, which reduces the local melting of the zinc alloy layer caused by high-temperature flushing of the aluminum liquid and reduces the thermal stress between the first alloy outer layer and the second alloy outer layer. The zinc alloy outer layer plays a role in shrinkage filling and pore control.

[0062] The application will be further described below with specific examples:

[0063] Example 1

[0064] This example provides a faucet prepared by the following method:

[0065] (1) A inner container with a cavity is prepared by stamping, shape rising, numerical control processing, and welding process;

[0066] The raw material for preparing the inner container is stainless steel, and the chemical composition is as follows in terms of mass percentage: C≤0.08%, Cr=18.00-20.00%, Ni=8.00-10.00%, Si≤1.00%, Mn≤2.00%, and P≤0.045%. The thickness of the inner container is 0.5 mm, and the size is 11.18 mm*22.16 mm*70 mm.

[0067] (2) Resin sand is injected into the cavity of the inner container for cavity filling and forming;

[0068] The relevant parameters of the resin sand are as follows: the proportion of resin is 0.6 wt%, the melting point is 110°C, the hardening time is 70 s, the fluidity (repose angle) is 27.17°, the particles of 300 μm in the resin sand account for 5-7%, the particles of 425 μm account for 69-73%, and the particles of 600 μm account for 20-24%.

[0069] After the resin sand enters the inner container, it is pressed and formed under the action of pressure, and the pressure is 0.4 MPa. The volume proportion of the resin sand in the cavity after being pressed and formed is 97%;

[0070] (3) Place the inner liner filled with resin sand into the mold and perform high pressure casting. The injection pressure is 25MPa, the injection time is 0.1s, the molding time is 0.3s, and after cooling and molding, the resin in the cavity is removed by high frequency vibration to obtain the faucet.

[0071] Example 2

[0072] This embodiment provides a faucet, which is basically the same as that in Embodiment 1, except that:

[0073] The thickness of the inner liner is 0.3mm.

[0074] Example 3

[0075] This embodiment provides a faucet, which is basically the same as that in Embodiment 1, except that:

[0076] The inner liner is 1mm thick;

[0077] High-pressure casting is performed with an injection pressure of 50 MPa.

[0078] Example 4

[0079] This embodiment provides a faucet, which is basically the same as that in Embodiment 1, except that:

[0080] Resin sand and silica gel are injected into the cavity of the inner liner to fill and mold the cavity. The mass ratio of resin sand to silica gel is 2:1, the particle size of silica gel is 150-250μm, the Shore A hardness is 70-90, and the viscosity is [not specified].

[0081] Performance testing

[0082] 1. The compressive strength of the resin sand liner filler, stainless steel liner, and liner filled with liner filler, all molded according to GB / T 7314-2017, was tested using a compression test. The dimensions of all three samples were 11.18mm*22.16mm*70mm, and the wall thickness of the liner was 0.5mm. The test results are shown in Table 1 below.

[0083] Table 1. Test results of tensile strength in Examples 1-4

[0084] The results above show that filling the stainless steel inner liner with resin sand and adjusting and optimizing the thickness of the inner liner can effectively improve its compressive strength, making it better meet the requirements of high pressure casting. The effect is better when the wall thickness of the stainless steel inner liner is 0.5mm to 1.0mm. Furthermore, selecting resin sand and other powders such as silica gel as the inner liner filler further improves the compressive strength of the stainless steel inner liner.

[0085] 2. The wall thickness and roughness of the inner wall of the faucet obtained in the embodiment were tested. The test method was to divide the faucet obtained in the embodiment into 4 equal parts along the length direction, and set each division point as a test point, thus obtaining 4 test points. The wall thickness and the roughness of the inner wall of the cavity were tested at these 4 test points. The average wall thickness and average roughness of these 4 points were calculated and recorded, and the appearance morphology of the inner wall of the inner liner was also recorded. The test results are shown in Table 2.

[0086] Table 2 shows the test results of wall thickness and inner wall roughness in Examples 1-4.

[0087] As can be seen from the above results, by setting an inner liner and filling the inner liner with specific resin sand, the vacuuming operation is avoided in this invention, the preparation method is simplified, and when the inner liner wall thickness of the obtained faucet is 0.5 to 1.0 mm, the inner liner wall is continuous and smooth, the thickness is uniform, and it has a high degree of consistency.

[0088] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method of manufacturing a faucet, characterized by, The application relates to a faucet manufacturing method. The method comprises the following steps: (1) preparing an inner container with a cavity; (2) injecting an inner container filler into the cavity of the inner container and filling and forming in the cavity; (3) placing the inner container filled with the inner container filler into a mold for high-pressure casting, removing the inner container filler in the cavity after cooling and forming, and obtaining the faucet. The inner container filler is one or more of resin, silica gel, foaming material, resin sand, steel ball, cement, wood chip mixture, flour, wax, ice and dry ice; and the raw material for preparing the inner container is at least one of stainless steel, titanium alloy, copper and aluminum. The inner container is prepared by stamping, pulling up, bulging, welding and numerical control processing, and the thickness of the inner container is 0.1-1 mm. The chemical composition of the stainless steel is as follows in terms of mass percentage: C<=0.08%, Cr=16.00-20.00%, Ni=8.00-15.00%, Si<=1.00%, Mn<=2.00% and P<=0.045%.

2. The method of claim 1, wherein the faucet is prepared by the steps of: The compression strength of the liner added with the liner filler is 200-600 kg / cm 2 ; The inner container filler is pressed and formed under the action of pressure after entering the inner container, the pressure is 0.2-0.6 MPa, and the particle size range of the inner container filler is 150-900 mu m.

3. The method of claim 1, wherein the faucet is prepared by the steps of: The inner container is made of stainless steel, and when the wall thickness of the inner container is 0.5 mm, the compression strength is 70-90 kg / cm 2 ; The volume proportion of the inner container filler in the cavity after being pressed and formed is 95-98%.

4. The method of claim 1, wherein the faucet is prepared by the steps of: The proportion of resin in the resin sand is 0.4-0.9 wt%, and the fluidity of the resin sand is 25-30 DEG. The inner container filler is resin sand, and the strength of the resin sand after pressing is 8-80 kg / cm 2 ; The proportion of 250-350 mu m particles in the resin sand is 5-7%, the proportion of 400-450 mu m particles is 69-73%, and the proportion of 550-650 mu m particles is 20-24%.

5. The method of claim 4, wherein the faucet is prepared by the steps of: The melting point of the resin sand is 105-115 DEG C. The inner container filler is resin sand and silica gel, the weight ratio of the resin sand and silica gel is (1-2):1, the particle size range of the silica gel is 150-500 mu m, and the Shore hardness is 50-90. The proportion of 250-350 mu m particles in the resin sand is 5-7%, the proportion of 400-450 mu m particles is 69-73%, and the proportion of 550-650 mu m particles is 20-24%; and the melting point of the resin sand is 105-115 DEG C.

6. The method of claim 1, wherein the faucet is prepared by the steps of: The inner container filled with the inner container filler is placed into a mold, and a liquid or semi-liquid metal is injected to perform high-pressure casting, so as to form an outer layer. The injection pressure during high-pressure casting is 20-100 MPa, the injection time is 0.01 s-0.5 s, and the forming time is 0.01 s-0.5 s.

7. The method of claim 1, wherein the faucet is prepared by the steps of: The inner container filled with the inner container filler is placed into a mold, and a liquid or semi-liquid alloy is injected to perform high-pressure casting, so as to form an alloy outer layer. ​ The alloy is a zinc alloy and / or an aluminum alloy.

8. The method of claim 7, wherein the faucet is prepared by the steps of: The faucet is prepared by the manufacturing method in any one of claims 1-8, the faucet comprises an inner container, the inner container has a cavity, and the cavity has a continuous and smooth surface. The faucet comprises an inner container and an alloy outer layer wrapped outside the inner container.

9. A faucet, characterized by The alloy outer layer is prepared by injecting an inner container filler into the cavity and filling and forming, then injecting a liquid or semi-liquid alloy outside the inner container, and then performing high-pressure casting to wrap the alloy outside the inner container.

10. The faucet of claim 9, wherein, ​ ​ 11. The faucet of claim 9, wherein The faucet comprises an inner container, a first alloy outer layer coated outside the inner container, and a second alloy outer layer coated outside the first alloy outer layer; The first alloy outer layer is prepared by injecting liquid or semi-liquid alloy outside the inner container after filling and forming of the inner container filler in the cavity, and then by first high-pressure casting to make the alloy coat outside the inner container; The second alloy outer layer is prepared by injecting liquid or semi-liquid alloy outside the first alloy outer layer, and then by second high-pressure casting to make the alloy coat outside the first alloy outer layer.

12. The faucet of claim 11, wherein The first alloy outer layer is a zinc alloy, the injection pressure of the first high-pressure casting is 30-70 Mpa, the injection time is 0.05-0.25 s, and the forming time is 0.01-0.2 s; The second alloy outer layer is an aluminum alloy, the injection pressure of the second high-pressure casting is 70-100 Mpa, the injection time is 0.1-0.5 s, and the forming time is 0.1-0.5 s.

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