Split mold

Abstract

The application provides a combined mold for casting a model, comprising an outer mold and an inner mold, the outer mold at least partially containing the inner mold, a mold space being formed between the outer mold and the inner mold for forming the model, the outer mold comprising an injection hole communicating with the mold space, characterized in that the inner mold comprises a center mold and a combined core mold, the combined core mold having a combined core mold hole matched with the center mold to form a shaft hole, the inner mold further comprising a water outlet core mold and a water inlet core mold connected with the combined core mold, the combined core mold comprising a first split mold, a second split mold, a third split mold and a fourth split mold arranged along the circumference of the combined core mold hole, the first split mold being connected with the water outlet core mold, and the third split mold being connected with the water inlet core mold.

Description

Technical Field

[0001] This invention relates to the field of molds, and in particular to a combined mold for producing an integral cast water meter. Background Technology

[0002] In the precision casting process, a wax model designed to be 1:1 with the product to be cast must first be cast. Then, a mold cavity is made from the wax model, and molten metal is poured into the mold cavity. After cooling, the mold layer is removed to obtain the prototype of the product. For products with fine internal structures, existing technologies usually have two processing methods: (1) In order to facilitate demolding during the wax model casting process, a split casting process is usually used for wax model casting. That is, the wax model is divided into multiple parts for casting and then assembled. In this way, demolding of the wax model is simpler during casting and the design of the casting mold is simpler. After the split wax model is formed by casting, the wax model is then connected and assembled. This connection method can be adhesive or mechanical. After the wax model is assembled into a whole, the subsequent metal casting process is carried out. This method may cause misalignment and gaps at the joint of the assembled wax model due to positioning issues in the combination method. For models with high closure requirements, such as water meters, these problems will lead to casting defects when casting water meters. Especially when using stainless steel for casting, because the fluidity of stainless steel itself is not easy to flow and form compared to other easily cast materials such as copper, it will further affect the casting yield and the cost input in the manufacturing process. (2) Casting a split wax model, and then casting the metal of each part of the product according to the split wax model. After forming each part of the product, the parts of the product are then combined by welding. Using this method to produce products, the welded products are prone to poor joint at the welding position, resulting in a decrease in the overall rigidity and safety of the product. If the above two methods are not adopted, the wax model with the inner cavity needs to be cast as a whole. The inner cavity needs to be arranged with a fine and easy-to-pull mold. The combination and removal of the mold are difficult problems to solve. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention proposes a combined mold that can integrally cast the model in the water meter casting process, thereby overcoming the aforementioned shortcomings of the prior art.

[0004] This invention provides a combined mold for casting a model, comprising an outer mold and an inner mold, wherein the outer mold at least partially encompasses the inner mold, and a casting space is provided between the outer mold and the inner mold for forming the model. The outer mold includes an injection hole communicating with the casting space. The inner mold comprises a central mold and a combined core mold, the combined core mold having a combined core mold hole that mates with the central core mold's shaft hole. The inner mold also includes an outlet core mold and an inlet core mold that mate with and are connected to the combined core mold. The combined core mold includes a first parting mold, a second parting mold, a third parting mold, and a fourth parting mold arranged circumferentially along the combined core mold hole, the first parting mold mates with and is connected to the outlet core mold, and the third parting mold mates with and is connected to the inlet core mold.

[0005] Unlike existing technologies, after the core mold is removed, the combined core mold hole provides space for the second and fourth parting molds to move within the water meter wax model, facilitating their removal. After removing the second and fourth parting molds, the space within the water meter wax model is larger, making it easier to remove the first and third parting molds. This achieves integrated casting.

[0006] In one embodiment, the inner mold is made of metal.

[0007] In one embodiment, the first mold, the second mold, the third mold and the fourth mold are respectively provided with sliding mechanisms for relative sliding between them and the core mold.

[0008] In one embodiment, the first mold has a connecting mold that extends at an angle to the central axis of the combined core mold hole, and the connecting mold connects to the water outlet core mold.

[0009] In one embodiment, the first mold includes a first sub-mold 1 connected to the second mold, a first sub-mold 2 connected to the fourth mold, and a first sub-mold 3 connected to the first sub-mold 1 and the first sub-mold 2.

[0010] In one embodiment, the third module includes a third sub-module one that is separately configured and connected to the second module, and a third sub-module two that is connected to the fourth module.

[0011] In one embodiment, the inner mold also includes a check mold that is angled relative to the connecting mold.

[0012] In one embodiment, the first split mold is located below the connecting mold and has a split mold with separate parts.

[0013] In one embodiment, a functional mold is provided between the connecting mold and the first dividing mold, and the functional mold is detachably connected to the check mold.

[0014] In one embodiment, the size of the inlet mandrel gradually increases toward the combined mandrel. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the combined mold is provided for an embodiment of the present invention.

[0017] Figure 2 An exploded view of the combined mold is provided for an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the overall mold assembly excluding the first part.

[0019] Figure 4 This is an exploded view of the inner mold.

[0020] Figure 5 for Figure 4 A magnified view of a portion of point a.

[0021] Figure 6 for Figure 4 A magnified view of a section at point b.

[0022] Figure 7 This is an exploded view of the inner mold.

[0023] Figure 8 This is an exploded view of the inner mold.

[0024] Figure 9 This is a schematic diagram of the water meter.

[0025] Figure 10 This is a cross-sectional view of the water meter.

[0026] Figure 11 This is an exploded view of the water inlet core mold.

[0027] Figure 12 This is an exploded view of the core mold. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] like Figure 1 , 2 As shown, the combined mold 10 is used to cast a water meter model. The combined mold 10 includes an outer mold 11 and an inner mold 12, with the inner mold 12 assembled and positioned inside the outer mold 11. There is a gap between the outer mold 11 and the inner mold 12, which constitutes the casting space 13. The outer mold 11 and the inner mold 12 have contacting parts, which can restrict the movement of the inner mold 12 and achieve the positioning of the inner mold 12 relative to the outer mold 11, while also forming the edge of the casting space 13. The outer mold 11 has an injection hole 110 that communicates with the casting space 13. The model in the solution state is injected into the combined mold 10 through the injection hole 110 and then enters the casting space 13. The shape of the casting space 13 determines the shape of the model.

[0032] The outer mold 11 has a first part 111 and a second part 112, both of which have inner cavities symmetrically arranged relative to their assembly surfaces. The inner cavities are configured to conform to the outer surface contour of the cast water meter. The inner mold 12 is positioned between the first part 111 and the second part 112, and conforms to the inner surface of the cast water meter. These three parts together form a casting space 13, the positions of which are adapted to the wall thickness of the cast water meter casing. A limiting mechanism 113 is provided between the first part 111 and the second part 112 to restrict the relative movement of the first part 111 and the second part 112 during casting. The limiting mechanism 113 includes grooves and bosses, pins and holes.

[0033] like Figure 9 , 10As shown, the water meter 20 includes a main body 21 and an inlet pipe 22 and an outlet pipe 23 connected to the main body 21. The main body 21 has a receiving cavity 210 and an opening 211. The receiving cavity 210 is used to place the water meter core, and the opening 211 is sealed with transparent glass for easy observation of the water meter core. The inlet pipe 22 has an inlet 220, and the outlet pipe 23 has an outlet 230. The receiving cavity 20 is connected to the inlet channel 221 through a receiving cavity inlet 271, and the receiving cavity 20 is connected to the outlet channel 231 through a receiving cavity outlet 261. The lumens of the inlet pipe 22 and the outlet pipe 23 are connected to the receiving cavity 210. Water enters the receiving cavity 210 from the inlet channel 22, flows through the water meter core, and then flows out from the outlet channel 23. The receiving cavity 210 includes an upper ring chamber 26 that communicates with the water inlet channel 221 and a lower ring chamber 27 that communicates with the water outlet channel, and a step portion 28 for separation is provided between the upper ring chamber 26 and the lower ring chamber 27.

[0034] like Figure 1 , 2 As shown in Figure 3, the inner mold 12 includes a central core mold 121, a combined core mold 122, an outlet core mold 125, and an inlet core mold 126. The combined core mold 122 has a combined core mold hole 1220, which is connected to the central core mold 121 via a shaft hole. The outlet core mold 125 and the inlet core mold 126 are both connected to the combined core mold 122. The casting space 13 formed on the outer side of the outlet core mold 125 forms an inlet channel, the casting space 13 formed on the outer side of the combined core mold 122 forms a receiving cavity 210, and the casting space 13 formed on the outer side of the outlet core mold 126 forms an outlet channel. The outlet core mold 125 is joined to the outer side of the combined core mold 122 to form a receiving cavity outlet that connects the outlet channel and the receiving cavity 210. The inlet core mold 126 is joined to the outer side of the combined core mold 122 to form a receiving cavity inlet that connects the inlet channel and the receiving cavity 210.

[0035] When the combined core mold 122 is used to form the receiving cavity 210, it needs to take into account the internal cavity characteristics of the upper annular chamber 26 and the lower annular chamber 27 of the receiving cavity 210, which are characterized by a large belly and a small opening (the radial dimensions of the upper annular chamber and the lower annular chamber are larger than the diameter of the opening 211 and the radial dimension of the stepped portion 28). The combined core mold 122 is designed to be easy to demold, and the combined core mold 122 is designed as a segmented structure surrounding the central core mold 121. The central mold 121 is allowed to be pulled out independently from the opening 211 relative to the combined core mold 122, thus making room for the internal space of the combined core mold hole 1220. This allows the combined core mold 122 to be removed segmentally in a set order. Specifically, in this embodiment, the combined core mold 122 includes a first parting mold 1221, a second parting mold 1222, a third parting mold 1223, and a fourth parting mold 1224, which are circumferentially separated along the combined core mold hole 1220. These four parts have mating surfaces parallel to the axial direction along the axial direction of the combined core mold hole 1220. These mating surfaces allow adjacent partsing molds to fit together along the mating surfaces and to slide apart in a radial direction perpendicular to the axial direction. In other embodiments, the number of segments in the combined core mold 122 is not limited to four and can be more. The outer surface of the first parting mold 1221 is fitted to the outlet core mold 125, forming the outlet flow channel 231 (outlet pipe 23). The third parting mold 1223 is fitted to the inlet core mold 126, forming the inlet flow channel 221 (inlet pipe 22). The middle core mold 121 is inserted into the combined core mold hole 1220, forming the main body 21 (receiving cavity 10) with the outer mold 11.

[0036] When removing the mold after casting, first open the outer mold 11, then remove the middle core mold 121, the outlet core mold 125, and the inlet core mold 126, and then remove the second parting mold 1222 and the fourth parting mold 1224. Since the second parting mold 1222 and the fourth parting mold 1224 are not connected to the outlet core mold 125 or the inlet core mold 126, their structural outlines are simple and they can move easily in the water meter wax mold. Moreover, after the middle core mold 121 is removed, the combined core mold hole 1220 provides space for the second parting mold 1222 and the fourth parting mold 1224 to move in the water meter wax mold. Therefore, the second parting mold 1222 and the fourth parting mold 1224 are removed from the water meter wax mold first. After removing the second mold 1222 and the fourth mold 1224, the space in the water meter wax mold is larger. Although the first mold 1221 and the third mold 1223 have structural outlines that match the water outlet core mold 125 and the water inlet core mold 126, there is still room for movement, which makes it easier for the first mold 1221 and the third mold 1223 to be removed from the water meter wax mold.

[0037] In this embodiment, the inner mold 12 is made of metal. Compared with other materials, metal has higher hardness and is not easily deformed, which can ensure the accuracy of the water meter wax mold.

[0038] The core mold 121 also has a longitudinally penetrating core mold hole 1210 at its center. Since the combined core mold hole 1220 is an annular structure, after the annular structure of the combined core mold 122 is sealed, during the actual wax injection process, the high-temperature wax expands, compressing the original air and creating a vacuum at the bottom of the core mold 121. If the core mold 121 is forcibly removed under these conditions, a bulge will form at the bottom of the wax mold cavity. If this is not detected, quality problems or increased weight may occur during the casting process, resulting in losses. In this invention, a longitudinally penetrating core mold hole 1210 is designed at the center of the core mold 121. Air is injected using an air gun to solve the vacuum problem, which is more efficient. Furthermore, the increased air pressure at the bottom will directly lift the core mold 121 a certain distance, making it easier and faster to remove the core mold 121.

[0039] like Figure 1 As shown, the first mold 1221, the second mold 1222, the third mold 1223, and the fourth mold 1224 are each provided with a sliding mechanism 120 for relative sliding between them and the core mold 121, which is arranged along the axial direction of the combined core mold hole 1220. When the core mold 121 is removed, the core mold 121 slides relative to the other molds along the axial direction of the combined core mold hole 1220 by means of the sliding mechanism 120. Preferably, the sliding mechanism 120 consists of a slide rail provided on the core mold 121 and a slide groove provided on each mold.

[0040] like Figure 2 , 3 As shown, the inner mold 12 includes a connecting mold 1221' that forms a connecting channel between the forming receiving cavity 210 and the water outlet pipe 23. The cross-section of the connecting channel at the end connecting the receiving cavity 210 is larger than the cross-section at the end closer to the water outlet pipe 23. Therefore, in order to facilitate the extraction of the connecting mold 1221', the connecting mold 1221' needs to be designed to be extracted from the outlet of the receiving cavity. In order to facilitate the efficient design of the overall extraction of the core mold, the connecting mold 1221' and the first parting mold 1221 of the combined core mold 122 are integrally set. Specifically, in this embodiment, the first parting mold 1221 is divided into three parts: the first sub-mold 1221a, the first sub-mold 21b, and the first sub-mold 31c. The first sub-mold 1221a is connected to the second parting mold 1222, the first sub-mold 21b is connected to the fourth parting mold 1222, and the first sub-mold 31c is connected to the first sub-mold 1221a and the first sub-mold 21b. The first sub-mold 1221a, the first sub-mold 2 1221b, and the first sub-mold 3 1221c can slide relative to each other. Therefore, when taking out the mold, the first sub-mold 3 1221c can be taken out first, and then the space freed up by the first sub-mold 3 1221c can be used to move and take out the first sub-mold 1221a and the first sub-mold 2 1221b.

[0041] Similarly, the third mold 1223 is provided with a contact portion 12231 that mates with the water inlet core mold 126. The cross-sectional dimension of the contact portion 12231 near the water inlet core mold 126 is larger than the cross-sectional area near the combined core mold 122. Therefore, the third mold 1223 is designed to be extracted from the inlet of the receiving cavity. To facilitate the extraction of the third mold 1223, the third mold 1223 includes a third sub-mold 1223a connected to the second mold 1222 and a third sub-mold 2 1223b connected to the fourth mold 1222. The third sub-mold 1223a and the third sub-mold 2 1223b can slide relative to each other.

[0042] Because the first parting mold 1221 has a connecting mold 1221' extending at an angle to the central axis of the combined core mold hole 1220, the first parting mold 1221 can be removed along the direction of the central axis of the combined core mold hole 1220 during demolding. However, since the lower annular chamber 27 usually has a radial bulge, the lower part of the first parting mold 1221 will also have a radial bulge. This makes it impossible for the lower part of the first parting mold 1221 to move along the direction of the central axis of the check channel 25. Therefore, the lower part of the first parting mold 1221 has a split mold 1221d. Specifically, the split mold 1221d can be a split mold of the first sub-mold 1221a, the first sub-mold 2 1221b, or the first sub-mold 3 1221c. The split mold 1221d is removed in stages along with the first sub-mold 1221a, the first sub-mold 2 1221b, and the first sub-mold 3 1221c.

[0043] The inlet mandrel 126 and the combined mandrel 122 cooperate to form the inlet channel. The dimensions of the inlet mandrel 126 gradually increase towards the combined mandrel 122, which makes the dimensions of the formed inlet channel gradually increase along the water inlet direction. This facilitates the smooth flow of water into the lower annular chamber and also facilitates the removal of the combined mandrel 122 from the receiving cavity inlet 271. The inlet mandrel 126 and the combined mandrel 122 have a height difference, which allows the water in the formed inlet channel to flow more smoothly from the inlet to the lower annular chamber 27.

[0044] like Figure 11 As shown, for ease of mold removal, the water inlet core mold 126 includes a separate central portion 1261 and multiple peripheral portions 1262 surrounding the central portion 1261. The dimensions of the peripheral portions 1262 gradually increase towards the combined core mold 122 to accommodate the formation of an inner cavity that gradually increases in size for the water inlet channel. During mold removal, the central portion 1261 can be removed first from the water inlet 220 of the water inlet pipe 22, and then each peripheral portion 1262 can be removed one by one. This facilitates the removal of the larger portions inside the peripheral portions 1262 from the water inlet 220.

[0045] like Figure 9 , 10As shown, a check wall 232 is provided on the outlet pipe 23 of the water meter 20. A check cavity 250 connected to the outlet channel 23 is formed in the check wall 232. The check cavity 250 is at an angle to the outlet channel 23. The check wall 232 surrounds the check cavity 250 and has a check hole 252 and a check opening 251 opposite to the check hole 252. The check wall 232 includes an inclined wall 2321 provided in the outlet pipe and a connecting wall 2322 vertically connected to the inclined wall 2321. The check hole 252 is opened in the inclined wall and connects a check channel 24 and the outlet channel 23. A check valve is provided in the check cavity 250 to prevent water from flowing backward. The check opening 251 is used to insert the check valve.

[0046] Correspondingly, the inner mold 12 includes a check mandrel 124 angled to the connecting mold 1221'. The check mandrel 124 and the connecting mold 1221' are assembled and positioned to form a check cavity 250, a check hole 252, and a check flow channel 25. The check mandrel 124 is also made of metal. In this embodiment, the check mandrel 124 is perpendicular to the connecting mold 1221' and is fitted with it via a shaft hole.

[0047] The water outlet core mold 125 and the check mold 124 are assembled and fitted to form a water outlet channel and a water outlet. The water outlet core mold 125 and the check mold core 124 are attached to one side surface to make the water outlet channel communicate with the check cavity. The water outlet core mold 125 includes a separate upper section 1251 and a lower end 1252. The upper section 1251 includes a straight section 12511 and an extension 12512 forming one end of the straight section near the assembled core mold 122. The width of the extension 12512 and the straight section 12511 in the direction perpendicular to the water outlet core mold 125 is greater than the width of the lower end 1252. When the water outlet core mold 125 is removed from the water outlet 230, the lower end 1252 is removed first to make room for the lower part of the upper section 1251, thereby facilitating the removal of the extension 12512 of the upper section 1251. In this embodiment, the extension 12512 of the upper section 1251 is connected to one side of the check mandrel 124, thereby forming a water outlet channel 231 that connects to the check cavity 250.

[0048] As shown in Figures 9 and 10, due to the unique design of the water meter core, water enters the receiving cavity 210 from the inlet pipe 22, then flows into the core from the bottom and out from the top, entering the check channel. Therefore, to connect the receiving cavity 210 and the check channel 25, the connecting mold 1221' needs to be tilted downwards, and the cross-sectional area of ​​one end of the connecting mold 1221' connecting to the first parting mold 1221 needs to be larger than the cross-sectional area of ​​the opposite end of the connecting mold 1221', so that the connecting mold can be easily removed from the receiving cavity outlet 261. Furthermore, the downward tilt of the connecting mold 1221' maintains the height difference between the outlet channel 231 and the inlet channel 221. Because the connecting mold 1221' needs to be tilted downwards, the thickness of the mold space 13 between the connecting mold 1221' and the first parting mold 1221 is significantly greater than the thickness of other mold spaces 13. This results in a wall thickness in this area being greater than in other areas, potentially leading to internal stress and stress concentration problems in this region. To avoid this problem, a functional mold 1241 is provided between the connecting mold 1221' and the first parting mold 1221 to reduce the thickness of the casting space 13 in this area, thereby preventing the formation of hot spots during subsequent stainless steel metal casting and affecting the overall performance of the stainless steel cast water meter. Specifically, the bottom shape of the functional mold 127 is adapted to the thickness area of ​​the casting space 13. In this embodiment, the bottom of the functional mold 127 is set as a wedge-shaped structure with a triangular cross-section. To facilitate demolding of the functional mold 127 within the casting mold, the groove area 29 formed by the functional mold 127 needs to be connected to the check channel 24. Therefore, the position of the functional mold 127 needs to be positioned, and the functional mold 127 needs to be fitted and connected to the connecting mold 1221'. The check mandrel 124 needs to be fitted and connected to the connecting mold 1221' to form a check hole 252. The functional mold 127 and the check mandrel 124 are then fixedly connected and integrally positioned relative to the connecting mold 1221', thus facilitating precise positioning of the functional mold 127 and the connecting mold 1221' relative to the easily positioned check mandrel 124. Specifically, the functional mold 127 and the check mandrel 124 are detachably connected via shaft holes. During demolding, the check mandrel 124 is removed first, followed by the functional mold 127.

[0049] like Figure 12 As shown, the functional mold 127 includes a separate groove mold 1271 and a protruding mold 1272. The groove mold 1271 has a groove, and the protruding mold 1272 is disposed in the groove of the groove mold 1271. The protruding mold 1272 has a protrusion, which cooperates with the outer end of the connecting mold 1221' to form the bottom of the return channel. During mold removal, the check mold 124 is first extracted along the axial direction of the check cavity 250, and then the groove mold 1271 is removed from the check hole 251 to make room for one side of the protruding mold 1272. Finally, the protruding mold 1272 along with its protrusion is removed.

[0050] During the demolding process, the outer mold 11 is opened, and the middle core mold 121, check core mold 124, water outlet core mold 125 and water inlet core mold 126 are first extracted from the model. Then, the second part mold 1222 and the fourth part mold 1224 are extracted by translating the space of the combined core mold hole 1220. After that, the first sub-mold 1221a, the first sub-mold 2 1221b, the first sub-mold 3 1221c, the third sub-mold 1223a, and the third sub-mold 2 1223b are extracted using the space freed up. Finally, the groove mold 1271 of the functional mold 127 is extracted, and finally the protrusion mold 1272 is extracted.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A combined mold (10) for casting a model, comprising an outer mold (11) and an inner mold (12), the outer mold (11) at least partially containing the inner mold (12), the outer mold (11) and the inner mold (12) having a mold space (13) therebetween for forming the model, the outer mold (11) comprising an injection hole (110) communicating with the mold space (13), characterized in that, The inner mold (12) includes a central core mold (121) and a combined core mold (122). The combined core mold has a combined core mold hole (1220) that mates with the central core mold (121). The inner mold (12) also includes an outlet core mold (125) and an inlet core mold (126) that mate with and are connected to the combined core mold. The combined core mold (122) includes a first parting mold (1221) and a second parting mold (126) that are circumferentially separated along the combined core mold hole (1220). 1222), the third mold (1223), and the fourth mold (1224), the first mold (1221) is connected to the outlet core mold (125), the third mold (1223) is connected to the inlet core mold (126), the first mold (1221) has a connecting mold (1221') extending at an angle to the central axis of the combined core mold hole (1220), the connecting mold is connected to the outlet core mold (125), and the inner mold (12) It also includes a check valve core mold (124) angled to the connecting mold (1221'), a functional mold (1241) disposed between the connecting mold (1221') and the first parting mold (1221), the functional mold (1241) being detachably connected to the check valve core mold (124) and engaging with the shaft hole of the connecting mold (1221'), the functional mold (1241) including a groove mold (1271) and a protruding mold (1271) engaging with the groove mold (1271). 1272), the protruding mold (1272) is disposed on the side of the groove mold (1271) opposite to the combined core mold hole (1220), the protruding mold (1272) is provided with a protrusion, the first dividing mold (1221) also includes a first sub-mold three (1221c) between the first sub-mold one (1221a) and the first sub-mold two (1221b), the protrusion of the protruding mold (1272) extends the axial length of the connecting mold (1221').

2. The combined mold (10) according to claim 1, characterized in that The inner mold (12) is made of metal.

3. The combined mold (10) according to claim 1, characterized in that, The first mold (1221), the second mold (1222), the third mold (1223) and the fourth mold (1224) are respectively provided with sliding mechanisms (120) for relative sliding between them and the core mold (121).

4. The combined mold (10) according to claim 1, characterized in that The first sub-module (1221) includes at least a first sub-module one (1221a) that is separately configured and connected to the second sub-module (1222) and a first sub-module two (1221b) that is connected to the fourth sub-module (1224).

5. The combined mold (10) according to claim 4, characterized in that The third sub-module (1223) includes at least a third sub-module one (1223a) that is separately configured and connected to the second sub-module (1222) and a third sub-module two (1223b) that is connected to the fourth sub-module (1224).

6. The combined mold (10) according to claim 1, characterized in that The first split mold (1221) is located at the lower part of the connecting mold (1221') and has a split mold (1221d) with separate parts.

7. The combined mold (10) according to claim 1, characterized in that The dimensions of the water inlet core mold (126) gradually increase in the direction of the combined core mold (122).

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