KR20110054685A - Faucet made of stainless steel and manufacturing method - Google Patents

Abstract

The present application relates to a faucet manufacturing method of a stainless steel material and a stainless steel faucet provided by the manufacturing method.

In the prior art, the faucet products are made by a casting process of brass, which is an alloy mainly composed of copper (Cu) and zinc (Zn), and most of the products are provided by chrome plating on the outer surface.

However, with the recent increase in environmental expectations in the Wal-Bing era, these brass faucets contain trace amounts of lead and antimony, which are harmful to humans, and the faucet turns red and harmful after long use. There is a growing voice that these substances should be released to eliminate these harmful components and replaced with water supplies provided in stainless castings made of SSC 13 or SSC 14 which are free of harmful components.

The present invention was completed in the process of finding a faucet manufacturing method for reducing the defect rate while increasing the production efficiency more than the conventional manufacturing method in view of the elements difficult to perform the casting process of stainless steel material.

Stainless steel, faucets, castings, brass, copper (Cu), zinc (Zn).

Description

Tap stainless steel tap apparatus and the manufacturing process

The present invention relates to a faucet manufacturing method made of stainless steel and to a faucet of a stainless steel material provided by the manufacturing method, and more particularly, to form a faucet body part of a simple structure manufactured in parallel with the vacuum precision casting method and the insert method It relates to a method of manufacturing a faucet made of stainless steel provided so as to.

In the prior art, faucet products were made by brass or bronze casting process, which is an alloy mainly composed of copper (Cu) and zinc (Zn), and provided by chrome plating on the outer surface.

However, with the recent increase in environmental expectations in the Wal-Bing era, these brass faucets contain trace amounts of lead and antimony, which are harmful to humans, and the faucet turns red and harmful after long use. It is a stainless steel casting material made of SSC 13 or SSC 14 material (which refers to the raw material used for casting of stainless steel alloy of SUS 304/316 material), which eliminates these harmful ingredients by confirming the discharge of substances. Although there is a voice that needs to be replaced with a product, the general bronze or brass casting process can be cast in the temperature range of 900 ~ 1000 ℃, but the stainless casting condition in which the work should be performed at high temperature in the range of 1400 ~ 1650 ℃ Difficult to provide faucet by welding stainless steel plate due to the difficulty of casting and stainless steel casting The present invention was made in the process of finding a faucet manufacturing method for reducing the occurrence rate of defects while increasing the production efficiency more than the conventional faucet manufacturing method in view of the elements difficult to perform the casting process made of stainless steel material. .

A conventional faucet internal structure provided by a brass or bronze casting process, which is an alloy composed mainly of copper (Cu) and zinc (Zn) by a conventional technique, is shown in FIG. 1, and the integral faucet body part ( 11) the opening and closing portion 12 is open to the upper center so that the handle shaft 14 having a soft rubber washer packing 13 can enter through the opening and closing portion, and the cap 15 blocks the opening and closing portion. The handle shaft does not fall out or water flows out through the opening and closing portion, and the center of the body portion is provided with a groove portion 16 into which the washer packing 13 enters, according to the rotation of the handle shaft 14 connected to the handle 17. The washer packing 13 was formed up and down to block the groove 16 to block the supply of water or open the groove to proceed with the supply of water.

The conventional faucet structure as shown in FIG. 1 melts brass, which is an alloy containing copper (Cu) and zinc (Zn), in a pre-made mold and solidifies the product, thereby producing a faucet body part product. In the process of melting and pouring into molds, it requires higher heating than the melting point (920 ~ 1000 ℃) of brass material, but high temperature of melting point (1430 ~ 1650 ℃) of stainless steel is needed to make faucet from stainless steel material. It has been pointed out that it is difficult to secure price competitiveness of commodities because it requires more manufacturing cost and time than when making a faucet of brass material.

As a prior art, Korean Patent No. 0683821 relates to a method of manufacturing a stainless steel water meter, which is used to make a ½-sided divided mold instead of a circular middle bar. ½ split wax model with the structure of inlet, outlet, inlet partition, outlet partition, support base, etc. for tap water required for internal structure of water meter It is a breakthrough method to obtain circular wax products by joining each other in a symmetrical structure and joining them to provide a new method that can easily perform casting process with complex inner core structure.

However, in the above method, the circular wax core for the water meter should be precisely processed to a thin thickness of 1.5 to 2.5 mm, more preferably 1.8 to 2.0 mm. There was a need for a method and an improvement for obtaining a round wax core.

The present invention is a method of manufacturing and supplying a faucet made of stainless steel, which facilitates the work process in combination with the vacuum precision casting method and the insert method, and is made of SSC 13 or SSC 14 material (which is a cast of stainless steel alloy of SUS 304/316 material). It is intended to provide a faucet of the material).

The present invention is not manufacturing a faucet made of stainless steel using a ½ split mold as in the conventional method, but in manufacturing a faucet made of stainless steel using a circular mold, the faucet body by making it possible to manufacture a faucet body with a simpler structure The purpose of the present invention is to provide a faucet manufacturing method of a stainless steel material having a cost competitiveness by reducing the time and process required to manufacture the result and lowering the manufacturing cost.

Hereinafter, the present disclosure discloses a means for obtaining a faucet made of stainless steel, which can increase production efficiency and reduce a defect rate, compared to the method disclosed to obtain a conventional faucet.

First, as a means for obtaining a circular wax core of the same model as the body of the faucet, a mold for obtaining a circular wax core having a thickness in the range of 1.5 to 2.5 mm is provided with an external mold frame having a half division structure together with the wax injection means. However, the outer mold frame having the ½-divided structure is a space where the central inserting hole, the first insert inserting hole and the second insert inserting hole are respectively inserted, so that the central inserting part, the first insert inserting part and the second insert inserting part are provided, respectively. The first step process of providing the frame and the cylindrical central insertion hole inserted into the central inserting portion of the outer mold having the ½ dividing structure include an inner space for inserting the insert inserting hole into the side of the central inserting hole. ), A second step of inserting the central insertion hole into the outer mold and inserting the first insert of the outer mold having the ½ division structure. The first insert insertion hole inserted through the part is inserted into the inner hole of the central upper hole provided in the second step process, and the second insert insertion part of the outer mold having the ½ division structure is inserted. Wax is injected through a wax injection hole provided on one side of an outer mold having a ½ dividing structure after the fourth step process of inserting the second insert insertion hole until the second insert insertion hole contacts the first insert insertion hole and the fourth step process is completed. The invention has been completed by confirming that a circular wax product of the faucet body portion can be obtained through a process including a fifth step of forming a circular wax core to have a shape and a shape of the meter body portion.

After the faucet body part is obtained as a circular wax product by the above process, a faucet body part provided by a stainless steel alloy of stainless casting material of SSC 13 or SSC 14 can be obtained using a known lost wax method. The relevant parts are inserted into the faucet body part made of stainless steel by the method to obtain the finished product.The ball valve enters the upper space of the body part provided by the central insertion hole, and the cap and the handle part are inserted into the upper part of the faucet body. The present invention can be completed by providing a faucet made of stainless steel that can supply or lock water by blocking the upper part of the hole and allowing the ball valve to be turned through the handle.

The stainless steel faucet of the present application can completely eliminate the concern that harmful substances such as lead and antimony, which may occur in a conventional chrome-plated brass faucet, may be completely eliminated, and stainless steel known to be free of harmful components. It has the effect of providing a faucet of eco-friendly products that can be replaced with products.

The present application has the effect of providing a cost-competitive stainless steel faucet by inducing cost reduction, especially in the process of manufacturing stainless steel faucet products at higher temperature conditions than brass products.

The company is looking for a method to apply the conventional stainless steel casting process because of the high cost of the cost, while providing faucets made of stainless steel facilitating economics and competitiveness through development of the manufacturing process of the present It is expected to be able to provide modern people with cheap products without fear of dissolution of harmful substances.

Hereinafter, as a faucet made of stainless steel and a method of manufacturing the same, a faucet body portion of a stainless steel material is provided in a simple structure, and a faucet having a watertight structure by easily assembling components such as a valve and a handle to the faucet body portion can be easily assembled. Disclosed is a technical idea of a method of manufacturing a faucet.

The faucet made of stainless steel provided herein is manufactured by simultaneously performing a vacuum precision casting method and an insert method of the faucet body constituting the faucet body, and a ball valve is inserted into the center of the faucet body and the cap is capped thereon. The faucet handle portion is connected to the ball valve while achieving a feature of having a structure capable of rotating the ball valve through the handle portion.

The faucet body part made of stainless steel casting has a space in which a ball valve is inserted in the upper part, and an inlet part for introducing water into one end part and a discharge part for discharging the introduced water part in the other end part. The technical idea of obtaining a wax product first and manufacturing a stainless steel faucet body part using the circular wax product is disclosed.

As a process for obtaining the faucet body part, design and manufacture an outer mold to obtain a circular wax product to the specification desired by the designer or the consumer, the circular wax having a thickness of 1.5 ~ 2.5㎜ in the shape and size of the faucet body part An outer mold for obtaining a ruler is provided to have a ½ split structure, and the outer mold includes a central insert for providing a space for insertion of a ball valve in the faucet body and a first insert insert for providing an inlet of the body; , The second insert inserts are formed to provide the discharge portion of the body portion, so that the central insert hole and the first and second insert insert holes are inserted into the respective insert portions.

In addition, the outer mold is provided with a wax injection means so as to inject the wax into the outer mold.

The central insertion hole has a structure that can be inserted into the outer mold through the central inserting portion provided in the center of the outer mold as a cylindrical form, in particular, where the central inserting hole meets the first insert inserting portion at the portion inserted into the outer mold. The inner space is formed in the position so that when the central insertion hole is completely inserted into the outer mold, the first insert insertion hole is provided to penetrate through the internal space of the central insertion hole.

The first insert insertion hole has a structure that can be inserted into the outer mold through the first insert insertion portion provided on the other side of the outer mold in the form of a cylinder, in particular so that the end of the first insert insertion hole of the cylindrical insert being inclined obliquely The cut surface should have a structure that can be in contact with the second insert insertion hole.

When inserting the first insert inserting hole into the first insert inserting portion of the outer mold, the center inserting hole is completely inserted first, and the first insert inserting hole can be inserted through the inner space formed in the central inserting hole.

The second insert insertion hole has a structure that is inserted into the outer mold through the second insert insertion portion provided on one side of the outer mold in a cylindrical shape, and in particular, the end of the second insert insertion hole is also inclined obliquely of the first insert insertion hole. Make sure you have the faceted side beveled at an angle so that the faced side face can be exactly contacted.

After combining the ½ type mold, insert the central insert hole, insert the first insert hole and the second insert hole, respectively, and inject the wax into the outer mold frame through the wax injection means. A wax model is obtained.

The process of obtaining a stainless steel faucet body part of SSC 13 or SSC 14 using the circular wax model is performed by first depositing a slurry on the circular wax model, covering the refractory, removing the wax, and then casting a stainless steel alloy. As the faucet body is obtained by peeling off the coated refractory, such a process is described in detail in Patent Publication No. 0683821, and thus a detailed description thereof will be omitted.

After obtaining the faucet body part made of stainless steel through the above process, it is possible to manufacture a faucet having a simple structure in which the ball valve is inserted into the upper part of the body part, the upper part is sealed using a cap, and the handle part is mounted to turn the ball valve.

Embodiments to which the technical spirit is specifically applied will now be described in detail with reference to the accompanying drawings.

Figure 2 shows a faucet body portion to be provided herein, Figure 2a is a perspective view of the faucet body portion of the present application, Figure 2b is a top plan cross-sectional view thereof, Figure 2c shows a side cross-sectional view thereof.

The faucet body portion provided herein has a discharge portion for discharging tap water at the other end having an inlet portion in which tap water is introduced at one end, and a flow rate adjusting unit so that a ball valve for controlling the inflow of tap water from the top of the center to a stop is installed. Have

Figure 3 shows a process chart to obtain a faucet by vacuum precision casting method, the part to which the new process of the present application is applied in Figure 3 (A) to (C) process part and the rest (D) to (I) The process is shown step by step the method disclosed in Patent Publication No. 0683821 (A) to (C) process will be described in detail with reference to FIGS.

The present invention obtains a high strength round wax product that is not easily broken in the mold design and manufacturing step (A) and the wax model injection step (B), but provides an inlet and an outlet part effectively, speeding up the overall manufacturing process and freeing the loss of raw materials. It is to provide an economical manufacturing method.

4 is a coupling relationship between two half molds, a central inserting hole, a first inserting hole, and a second insert inserting hole in the present application, which produce a circular wax model of the faucet body part in parallel with the vacuum precision casting method and the insert method. It is shown.

A circular wax model faucet body part may be completed by combining the central inserting hole, the first insert inserting hole, and the second insert inserting hole to the two outer molds of the ½ type.

Figure 5 shows a process for producing a faucet body portion circular wax model of the present application in parallel with the vacuum precision casting method and the insert method.

First, as shown in FIG. 5a, the two half molds of the outer mold are connected to each other. The ½ type outer mold frame is provided with a frame in the form of ½ type faucet body on the surface in contact with each other, the center insertion portion into which the central insertion hole enters the upper part, the first insert insertion hole enters to the left side based on the drawing The first insert inserting portion has a structure in which a second insert inserting portion into which the second insert inserting hole enters the lower right side is formed, respectively.

FIG. 5B illustrates a form in which the two half molds of the ½ form contact each other and then the central insertion hole is inserted deeply into the outer mold through the central insertion portion. The central insertion hole is provided with an internal hole through which the first insert insertion hole passes, and when a first insert insertion hole is inserted into the first insert insertion portion, a part of the first insert insertion hole penetrates through the inner hole of the central insertion hole. To be interpolated.

FIG. 5C illustrates a form in which the first insert insertion hole and the second insert insertion hole are inserted into the outer mold frame. The first insert insertion hole is inserted into the outer mold in the direction of the inlet of the faucet through the first insert insertion portion, wherein a part of the end of the first insert insertion hole passes through the inner hole provided in the central insertion hole, and a predetermined amount of the faucet discharge portion is inserted. The end of the first insert insertion hole has an inclined end face inclined to the shape of the faucet discharge portion. The second insert insertion hole is inserted into the outer mold in the direction of the discharge portion of the faucet through the second insert insertion portion, the end of the second insert insertion hole inclined to the end of the first insert insertion hole in accordance with the shape of the discharge portion To match exactly.

Figure 5d shows a form of injecting wax into the outer mold through the wax injection means provided separately. When wax is injected into the empty space between the outer mold, the central insertion hole, and the first and second insert insertion holes and the wax solidifies, the wax is removed from the mold mold to obtain a circular wax model of the faucet body.

5E illustrates a process of removing the first insert insertion hole and the second insert insertion hole from the outer mold after injecting wax, and FIG. 5F illustrates a process of removing the central insertion hole. If the center insert hole, the first insert insertion hole, the second insert insertion hole is removed, and the outer mold is removed, a circular wax model of the faucet body part can be obtained.

The wax model obtained through the process of FIG. 5 may obtain a circular faucet body part of the stainless steel material shown in FIG. 2 through (D) to (I) processes disclosed in FIG. 3.

Figure 6 shows a perspective view of the assembly of the faucet is completed by putting the ball valve and the cap in the adjusting groove of the faucet body portion and fitting the handle, Figure 7 shows the faucet provided in the technical concept of the present application, 7a is the assembled faucet 7B is a side cross-sectional view showing the internal structure of the assembled faucet.

The faucet body portion 100 manufactured by the process of FIG. 3 is provided with an inlet portion 101 through which tap water is introduced on one side where the first insert insertion hole is located, and tap water is discharged on the other side where the second insert insertion hole was under threat. Discharge part 102 is provided. In addition, an adjustment groove 103 is provided to control the flow of water by inserting a valve in the center of the center insertion hole.

At this time, the inlet 101 may be provided with a screw thread or other connecting means so as to be connected to the water pipe, a separate processing means may be added to the outlet 102 to connect a hose or the like.

The valve 110 is inserted into the control groove 103, the valve 110 is preferably a valve that can control the flow of water by rotation as a ball valve (ball balve), the valve specified in the present application must be It is not limited only to the valve.

The valve shaft 111 is integrally provided with the valve at the upper end of the valve 110 to be connected to the handle 130 so that the valve 110 connected to the valve shaft rotates together when the handle is rotated.

A cap 120 is provided between the valve 110 and the handle 130 to seal the upper portion of the adjusting groove of the faucet body 100. The cap 120 has a groove so that the valve shaft 111 can pass through the center, and the O-ring 112 between the cap 120 and the adjusting groove 103 and between the cap 120 and the valve shaft 111, respectively. 113 is inserted to provide a watertight structure.

FIG. 8 is a view illustrating an application example in which a one-touch coupling part is added to the faucet product of FIG. 7. The faucet outline perspective view of FIG. 7A and the side cross-sectional view of FIG. 7B are simply external to the inlet part 101. A faucet capable of forming a one-touch type coupling part by simply plugging the circular pipe in a flat state into the faucet of FIG. 8A is a perspective view of a faucet forming a one-touch coupling part, FIG. 8B is an enlarged view of a one-touch coupling part, and FIG. 8C is an exploded perspective view of the faucet, and as a step of the faucet inlet part 101 of the present application. O-ring 141 is formed first to form a watertight structure and the spring 142 for pushing the snap ring at a constant pressure and Inlet portion 101 of the structure having a snap ring 144 for preventing the separation of the sub-pipe, the snap ring is arranged in a line by the connecting ring 143 and the sleeve 145 is finally inserted into the step toward the inlet side It is shown that it can be easily assembled into a structure that simply fits the faucet having a one-touch type coupling portion to the external circular pipe without the screw tightening work that requires a lot of hands for connecting the faucet.

As mentioned above, the embodiment of the faucet having a faucet body part made of stainless steel and its manufacturing method is also described above with the accompanying drawings, but the technical spirit of the present application is limited to the embodiments described in the detailed description for the practice of the present invention. Instead, various modifications may be made.

1 is a cross-sectional view showing a conventional faucet structure.

Figure 2 is an exemplary view showing a faucet body portion of a stainless steel material provided herein.

Figure 3 is a process diagram showing the manufacturing process of the faucet body portion made of stainless steel.

Figure 4 is a perspective view of the outer mold to obtain a circular wax model.

5 is an exemplary view showing a manufacturing process for obtaining a circular wax model.

6 is a perspective view showing a state in which the valve and the handle portion coupled to the faucet body portion.

Figure 7 is a perspective and side cross-sectional view of the completed faucet body portion.

Figure 8 is an application example of adding a one-touch coupling to the faucet product of Figure 7;

********** Explanation of the main symbols in the drawings **********

20: outer mold 21: center insert

22: the first insert inserting part 23: the second insert inserting part

30: center insertion hole 31: inner hole

40: first insert insertion hole 41: end face beveled obliquely oblique

50: the second insert insertion hole 51: the end face beveled obliquely

100: faucet body 110: valve

111: valve shaft 120: cap

130: handle portion 140: one-touch coupling portion

141: O-ring 142: spring

143: connection ring 144: snap ring

145: sleeve

Claims (3)

In the manufacturing method of the stainless steel faucet, It is a mold for obtaining a round wax model having a thickness in the range of 1.5 to 2.5 mm in faucet shape and size. A first step of providing the outer mold with a central inserting portion 21, a first insert inserting portion 22, and a second insert inserting portion 23 formed therein; The central inserting rod 30 is inserted into the central inserting portion 21 of the outer mold 20, and an inner hole 31 is formed at the end side of the central inserting rod so that the first insert inserting hole can be inserted. Providing a second step; The first insert inserting hole 40 is inserted into the first insert inserting portion 22 of the outer mold 20, and the inner hole of the central inserting rod inserted first in the second step when the first insert inserting hole is inserted A third step interpolated so as to penetrate through the 31, and an end portion of the first insert insertion hole 40 having an inclined face 41 to be inclined obliquely; The second insert inserting hole 50 is inserted into the second insert inserting portion 23 of the outer mold 20, and the end portion of the second insert inserting hole inserted into the second insert inserting hole is inclined obliquely of the first insert inserting hole. A fourth step provided with the cut face 51 inclined so as to be in contact with the cut face 41; A fifth step of obtaining a circular wax model of the faucet body by injecting wax into the outer mold through a separately provided wax injection means; The method of manufacturing a faucet of stainless steel alloy, characterized in that to obtain a circular wax product through a process comprising a and obtain a faucet body portion provided by a stainless steel alloy by a lost wax method using the wax product. In the faucet made of stainless steel produced by the manufacturing method of claim 1, It is manufactured by the manufacturing method of claim 1, the inlet portion 101, which is a portion in which water is introduced into one side end is provided with a discharge portion 102 for discharging water at the other end, respectively, and drilled from the upper end to the middle stop Faucet body portion 100 is provided with an adjusting groove 110 to adjust the discharge of the water; A valve 110 inserted into the adjustment groove 103 of the faucet body part and provided to have a valve shaft 111 connected to the handle part at an upper end thereof; Cap 120 is provided so as to form a watertight structure by closing the upper end of the control groove 103 while sandwiching the valve shaft 111; A handle 130 which is connected to the valve shaft 111 to the top of the cap and provided to turn the valve; Faucet of stainless steel material, characterized in that provided, including. The method of claim 2, The stainless steel faucet has a one-touch coupling part 140 for forming a watertight structure into the inlet 101 of the faucet, the one-touch coupling part O-ring 141 and the spring 142, the separation of the outer pipe Faucet made of stainless steel, characterized in that the snap ring 144 and the sleeve 145 to prevent the insertion is made of a one-touch coupling in a configuration that is sequentially interpolated.

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