Pump body production mold

Abstract

The present application relates to the technical field of mould and discloses a pump body production mould, which comprises upper mould, middle mould and bottom mould arranged in sequence, and a first cavity is formed by the upper mould, the middle mould and the bottom mould together, a feeding port is arranged on one of the upper mould, the middle mould and the bottom mould, the upper mould and the bottom mould together form a second cavity, the upper mould is connected with a first movable block, and the first movable block is formed with a first arc surface by bending an arc; the upper mould is formed with a second arc surface by bending an arc; the middle mould is provided with a second movable block, and the second movable block is formed with a third arc surface by bending an arc. The cooperation between the first movable block, the second movable block, the upper mould, the middle mould and the bottom mould completes the overall assembly of the external contour of the pump body, and the corresponding mould of the connecting part of the pump shell and the liquid outlet pipe is divided into three parts, one part is located on the upper mould to provide support, the first movable block ensures the separation between the upper mould and the bottom mould, and the second movable block facilitates the separation of the middle mould, so that the demoulding difficulty is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, in particular to a pump body production mold. BACKGROUND

[0002] A mold is a tool used in the mass production of industrial products by injection molding, blow molding, extrusion, die casting or forging, smelting and stamping, etc. In short, a mold is a tool used to support the molding of an article. Such a tool has various parts, and different molds are made up of different parts. It mainly realizes the processing of the shape of an article by changing the physical state of the material being molded.

[0003] Current pump bodies are mainly obtained by processes such as die casting. Compressed air is introduced into the mold, and the metal liquid for manufacturing the pump body enters the mold smoothly under the action of gas pressure until the valve body is formed to obtain the pump body. The outlet pipe of the pump body has an included angle less than 90 degrees with the pump shell, so that the inner side of the connection between the outlet pipe and the pump shell forms a triangular virtual space along the outer wall of the outlet pipe and the pump shell. The side of the triangular virtual space facing the outlet pipe forms a shape with a central depression towards the center of the triangular virtual space, and the position of the triangular virtual space at the included angle of the connection between the outlet pipe and the pump shell also forms a shape with a central depression towards the center of the triangular virtual space. Therefore, when the corresponding molding chamber is integrally formed with the mold, the third annular plate, the outlet pipe and the pump shell of the pump body will all become obstacles to the stripping of the mold from the triangular virtual space. The traditional mold is usually fixed in the vertical or horizontal direction for stripping, and the triangular virtual space restricts the movement of the mold in the vertical direction. The connection is restricted by the third annular plate, the outlet pipe and the pump shell, making it difficult for the mold to move in the horizontal direction, resulting in the problem of difficult stripping of the connection between the outlet pipe and the pump body. SUMMARY

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present application is to provide a pump body production mold to solve the problem of difficult stripping.

[0005] To solve the above technical problems, the present application adopts one technical scheme: providing a pump body production mold and specifically comprising sequentially arranged upper mold, middle mold and bottom mold, the middle mold comprising front side mold and rear side mold arranged in buckling and fourth movable block symmetrically arranged at the bottom of the front side mold and the rear side mold, the upper mold, the front side mold, the rear side mold, the fourth movable block and the bottom mold are collectively surrounded to form a first cavity with the outer contour of the pump shell of the pump body, a feeding port is arranged on one of the mold blocks of the upper mold, the front side mold, the rear side mold and the bottom mold and is communicated with the first cavity to enable the injection of metal liquid into the first cavity, a first mold core part is arranged in the first cavity and is matched with the inner contour of the pump shell to jointly form a cavity with the first cavity and the first mold core part, the cavity is consistent with the shape of the pump shell, after the metal liquid enters the first cavity through the feeding port, the metal liquid fills along the first cavity and the first mold core part until solidification to form a complete pump shell, a second cavity is collectively surrounded by the upper mold and the bottom mold at the position corresponding to the liquid outlet pipe of the pump body and is matched with the outer contour of the liquid outlet pipe and communicated with the first cavity to form a cavity consistent with the outer contour of the pump shell and the liquid outlet pipe, a second mold core part is arranged between the upper mold and the bottom mold and extends into the first cavity and the second cavity and abuts against the first mold core part, the second mold core part is matched with the inner contour of the liquid outlet pipe to enable the inner cavities of the liquid outlet pipe and the pump shell to be communicated with each other after the formation of the liquid outlet pipe and the pump shell, a forming cavity is collectively surrounded by the first cavity, the first mold core part, the second cavity and the second mold core part, the contour of the forming cavity is consistent with the shape of the pump body, the forming cavity is filled with metal liquid and formed, and the production of the pump body is completed, a first movable block is connected to the upper mold at the position corresponding to the inner side of the connection between the pump shell and the liquid outlet pipe, the first movable block is located at the joint of the first cavity and the second cavity, the bottom surface of the first movable block is arranged flush with the bottom surface of the upper mold to have a first abutting surface in the form of a horizontal plane and used for abutting against the top surface of the bottom mold, the upper part of one side surface of the first movable block facing the second cavity is concave to form a first arc surface, the first arc surface, the upper mold and the bottom mold collectively surround the second cavity, a second arc surface is arranged on one side surface of the first movable block facing the first cavity and matched with the outer wall contour of the pump shell, a second movable block at the joint of the first arc surface and the second arc surface corresponds to a first part of one of the three parts, and the joint is curved to form a first arc surface matched with the contour of the first part to enable the first movable block to form the first cavity, the second cavity and one of the three parts, and the small and convenient first movable block enables it to be removed from various directions without being limited by the irregular shape of the connection between the liquid outlet pipe and the pump shell, thereby facilitating demolding, the joint of the upper mold between the first cavity and the second cavity and above the first movable block corresponds to a second part of the inner side wall of the connection between the liquid outlet pipe and the pump shell, and the joint is curved to form a second arc surface matched with the contour of the second part.The second movable block is connected in the first cavity on the middle die, and a side of the second movable block facing the second cavity is arranged flush with a side of the middle die facing the second cavity to have a second abutting surface in vertical plane and used for abutting against the upper die. A bottom surface of the second movable block corresponds to the third part of the inner side wall of the connecting part of the liquid outlet pipe and the pump shell, and a third arc surface corresponding to the profile of the third part is formed on the bottom surface of the second movable block by bending, so that the connecting part of the liquid outlet pipe and the pump shell has an irregular inner side wall which is divided into three parts and is composed of the upper die, the first movable block and the second movable block respectively. Thus, during demolding, the upper die, the bottom surface and the middle die can be demolded in the conventional manner, the second arc surface is separated from the upper die, and the second movable block and the second movable block are separated from other modules after the pump body is formed, and then the pump body is demolded. The small first movable block and the second movable block are not limited by the conventional demolding manner, and can be demolded from any convenient direction, thereby greatly reducing the difficulty of demolding.

[0006] A first clamping groove is formed on the bottom of the upper die and on the side of the first movable block away from the first cavity, and the first movable block is located between the first clamping groove and the first cavity. A first clamping block corresponding to the first clamping groove is formed on the top surface of the bottom die. The first clamping block has a third arc surface on a side corresponding to the liquid outlet pipe, and a second clamping groove corresponding to the first movable block and the bottom of the upper die is formed around the side of the first clamping block facing the first cavity and the top surface of the bottom die. The first arc surface, the third arc surface, the first arc surface, the second arc surface, the third arc surface, the upper die and the bottom die jointly form the second cavity. Thus, the contact surface between the first movable block and the bottom die is increased, the connection between the upper die and the bottom die is more compact, and when the mold is disassembled, the first movable block is highlighted by the first clamping groove and the first cavity after the upper die and the bottom die are separated, so that the first movable block is easier to operate, the disconnection between the first movable block and the upper die is facilitated, and the demolding is facilitated.

[0007] The first movable block is sequentially formed with a first section, a second section, a third section, a fourth section and a fifth section from a side of the first cavity to a side of the first clamping groove on a side of the second cavity, a first inflection surface and a second inflection surface are respectively formed at a connection between the first section and the second section and a connection between the second section and the third section, the first inflection surface and the second inflection surface are respectively formed in a convex manner and face away from each other to form an "S" shape, a third inflection surface and a fourth inflection surface are respectively formed at a connection between the third section and the fourth section and a connection between the fourth section and the fifth section, the third inflection surface and the fourth inflection surface are respectively formed in a convex manner and face away from each other to form an "S" shape, the upper die is arranged in a matched manner with the first movable block at a position corresponding to the first movable block, so that a connection between the first movable block and the upper die is formed in a convex structure in an "Ω" shape, so that the upper die and the first movable block can not only form riveting, but also the first inflection surface and the fourth inflection surface can limit the parts corresponding to the second section, the third section and the fourth section in a horizontal direction, so as to prevent the first movable block from moving in the horizontal direction to change the composition of the second cavity and the first cavity, and meanwhile, the connection structure can also not affect the connection and matching between the first movable block and the upper die when the first inflection surface is in an irregular shape.

[0008] The bottom surface of the upper mold is concave upward in the middle part corresponding to the position of the middle mold, and a first through slot is formed in the middle part, and a first mold groove matched with the outer contour of the first annular plate is formed on the side of the first through slot and the middle mold, respectively, the middle mold is inserted into the first through slot, and the two first mold grooves form a cavity consistent with the outer contour of the first annular plate to form the first annular plate after the metal liquid enters and is shaped; the bottom surface of the upper mold is concave backward on both sides of the first through slot, and a second mold groove matched with the outer contour of the shell and part of the second annular plate is formed on the bottom surface of the upper mold, and a third mold groove matched with the outer contour of the water outlet pipe and part of the third annular plate is formed on the bottom surface of the upper mold corresponding to the position of the water outlet pipe, the third mold groove is communicated with the second mold groove, the first movable block is located between the third mold groove and the second mold groove close to the third mold groove, the second arc surface is matched with part of the outer contour of the shell and the second annular plate, and the second arc surface and the upper mold form the second mold groove to realize the integrated multi-purpose of the first movable block; the middle mold is formed with a fourth mold groove matched with the outer contour of the water inlet pipe, and a fifth mold groove matched with the outer contour of the shell and part of the second annular plate is formed on the middle mold, the fourth mold groove and the fifth mold groove are coaxial and communicated with the first mold groove, the second mold groove and the fifth mold groove form a cavity consistent with the outer contour of the shell, and the second movable block is located in the fifth mold groove to support the shape structure of the shell part of the pump body, while ensuring the convenience of demolding and splitting the parts of the pump body into the mold; the bottom surface of the middle mold is concave downward to form a second through slot, and the bottom of the middle mold is inserted into the second through slot, so that the connection and cooperation between the upper mold, the middle mold and the bottom mold will not be easily loosened before being fixed, and the connection tightness between the upper mold, the middle mold and the bottom mold is improved; the top surface of the bottom mold is concave backward on both sides of the second through slot to form a sixth mold groove matched with part of the outer contour of the second annular plate, and a seventh mold groove matched with part of the outer contour of the water outlet pipe and the third annular plate is formed on the top surface of the bottom mold corresponding to the position of the water outlet pipe, the seventh mold groove is communicated with the sixth mold groove, the second mold groove, the fifth mold groove and the sixth mold groove form a cavity consistent with the outer contour of the second annular plate, and the first arc surface, the third arc surface, the first arc surface, the second arc surface, the third arc surface, the third mold groove and the seventh mold groove form a cavity consistent with the outer contour of the water outlet pipe, so that the upper mold, the middle mold and the bottom mold complete the overall deployment of the outer contour of the pump body.

[0009] The upper part of the side surface of the front side mold and the back side mold of the middle mold is extended and abuts to each other, so that the upper part and the lower part of the front side mold and the back side mold form a stepped surface, thereby corresponding to the formation of the water inlet pipe and the shell of the pump shell, the fourth type groove is formed on the side surface of the front side mold and the back side mold which abut to each other, the first type groove is formed on the top surface of the front side mold and the back side mold, the fifth type groove is formed on the bottom surface of the front side mold and the back side mold, the front side mold is close to the second type cavity, and the second movable block is arranged on the front side mold, so that the middle mold can be separated from the pump body during demolding, and because the diameters of the first annular plate and the shell are different from the diameter of the water inlet pipe, the middle mold can only be demolded from the horizontal direction, and the second movable block is arranged at the inner side wall of the connection between the water outlet pipe and the shell, and the shape of the third arc surface is irregular, so that the middle mold cannot be separated from the pump body if the second movable block is integrally formed with the middle mold, and the second movable block in the embodiment solves the problem, and the two fourth movable blocks are arranged at the bottom of the front side mold and the back side mold, so that the middle mold and the bottom mold can be quickly assembled.

[0010] A first through hole is formed on the upper mold at the position corresponding to the water inlet pipe, the first mold core part includes an inner mold column integrally formed on the bottom mold and protruding upward to be arranged in the sixth type groove, an inner mold sleeve which is combined by multiple pieces and arranged around the inner mold column, and a first inner mold arranged in the first through hole and extending into the fourth type groove, the top surface of the inner mold column and the outer surface of the inner mold sleeve are matched with the inner contour of the shell and the second annular plate, the first inner mold extends to the outer wall of the inner part of the water inlet pipe and is matched with the inner contour of the water inlet pipe and abuts to the top surface of the inner mold column, so that the cavity which is consistent with the inner contour of the pump shell is formed by the first inner mold, the top surface of the inner mold column, the outer surface of the inner mold sleeve and the first type cavity, thereby completing the arrangement of the inner contour of the pump shell, the inner mold column is integrally formed on the bottom mold, so that the inner mold column can be stripped together with the bottom mold when the bottom mold is stripped, thereby simplifying the demolding process to some extent, and the inner mold sleeve which is combined by multiple pieces is convenient for assembly and disassembly.

[0011] The sixth type groove is concave around the inner mold column at the position corresponding to the inner mold sleeve, the bottom of the inner mold sleeve is inserted into the annular groove, and the top surface of the inner mold sleeve is consistent with the top surface of the inner mold column, so that the annular groove can limit the inner mold sleeve during assembly, and prevent the inner mold sleeve combined by multiple pieces from falling, and the top surface of the inner mold column is protruding upward to form a protruding column extending into the fourth type groove at the position corresponding to the fourth type groove, and the first inner mold abuts to the protruding column.

[0012] Two side baffles capable of abutting each other and blocking the second cavity are arranged on the upper die and the bottom die respectively, a second through hole is formed on the side surface of the two side baffles facing each other, the second die core part includes a second inner die penetrating through the second through hole and extending into the first cavity and the second cavity, and a third movable block connected to one end of the second inner die extending into the first cavity and abutting against the outer wall of the inner die sleeve, the outer contour of the third movable block is matched with the inner contour of the connection part of the water outlet pipe and the pump shell, and a second clamping groove for clamping the third movable block is formed on the inner die sleeve at the position corresponding to the connection part of the water outlet pipe and the pump shell, and the molding cavity is formed by the first inner die, the inner die column top surface, the outer side surface of the inner die sleeve, the first cavity, the second inner die, the third movable block and the second cavity, so as to facilitate the stripping of the first inner die.

[0013] A first guide hole is formed on the side surface of the first inner die and the inner die column facing each other, two second guide holes are respectively formed on the side surface of the upper die and the bottom die facing each other, and the two second guide holes on the upper die and the bottom die are diagonally distributed, when assembling, a bolt is inserted between the opposite guide holes so that the two ends of the bolt are respectively inserted into the corresponding two guide holes, thereby ensuring the alignment of the first inner die and the inner die column and the alignment of the upper die and the bottom die, thereby simplifying the installation process, achieving quick alignment and installation, and preventing the upper die and the bottom die from being misaligned and increasing the trouble and time consumption.

[0014] Locking grooves are vertically formed on the two sides of the upper die and the bottom die, and the fixtures are installed after the assembly of each module is completed.

[0015] The pump body production mold has at least the following beneficial effects:

[0016] By arranging the first movable block on the upper die and the second movable block on the middle die, the cooperation between the first movable block, the second movable block, the upper die, the middle die and the bottom die completes the overall assembly of the outer contour of the pump body, and the corresponding modules at the position of the inner side wall of the connection part of the pump shell and the liquid outlet pipe are divided into three parts, one part is located on the upper die for support, the first movable block ensures the stripping between the upper die and the bottom die, and the second movable block facilitates the stripping of the middle die, so that the upper die, the middle die and the bottom surface can still be stripped in the original and traditional way, greatly reducing the stripping difficulty, and the deployment of the connection part can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0018] Figure 1This is a schematic diagram of the pump body.

[0019] Figure 2 This is a schematic diagram of the pump body manufacturing mold of the present invention;

[0020] Figure 3 This is an exploded view of the pump body manufacturing mold of the present invention;

[0021] Figure 4 This is a side sectional view of the pump body manufacturing mold of the present invention;

[0022] Figure 5 This is a top cross-sectional view of the pump body manufacturing mold of the present invention;

[0023] Figure 6 This is a schematic diagram of the upper mold and the first movable block after separation according to the present invention;

[0024] Figure 7 This is a side sectional view of the upper mold and the first movable block after they are fitted together according to the present invention;

[0025] Figure 8 This is a schematic diagram of the pump body production mold of the present invention after concealing the bottom mold and inner mold sleeve;

[0026] Figure 9 This is a schematic diagram of the pump body production mold of the present invention after concealing the bottom mold and one side baffle.

[0027] Figure 10 This is a schematic diagram of the pump body production mold of the present invention after the pump body is formed and the upper mold is hidden;

[0028] Figure 11 This is a schematic diagram of the structure after the front mold and the second movable block of the present invention are separated.

[0029] The meanings of the labels in the attached diagram are as follows:

[0030] Pump body-1; Pump casing-11; First annular plate-111; Inlet pipe-112; Casing-113; Second annular plate-114; Outlet pipe-12; Outlet pipe-121; Third annular plate-122;

[0031] Upper mold-2; First through slot-211; First perforation-212; First groove-22; Second groove-23; Third groove-24; Upper side baffle-25; First movable block-26; First mating surface-261; First arc surface-262; Second arc surface-263; First arc-shaped surface-264; First surface-271; Second surface-272; First cross section-273; Second cross section-274; Third cross section-275; Fourth cross section-276; Fifth cross section-277; First engaging groove-28; Second arc-shaped surface-29;

[0032] Middle mold-3; First groove-31; Fourth groove-32; Fifth groove-33; Front mold-34; Rear mold-35; Fourth movable block-36; Slot-37; Second movable block-38; Third arc surface-381; Second mating surface-382; Limiting plate-39;

[0033] Bottom mold-4; First locking block-41; Boss-42; Second locking groove-43; Second through groove-44; Sixth type groove-45; Seventh type groove-46; Annular groove-47; Lower side baffle-48;

[0034] First mold core - 5; Inner mold pillar - 51; Protruding pillar - 511; Inner mold sleeve - 52; Second engagement groove - 521; First inner mold - 53; First head - 54;

[0035] Second mold core - 6; Second inner mold - 61; Second head - 62; Third movable block - 63;

[0036] Molding cavity - 7; First cavity - 71; Second cavity - 72; First guide hole - 73; Second guide hole - 74; Locking groove - 75. Detailed Implementation

[0037] The invention will now be further described with reference to the accompanying drawings.

[0038] Reference Figure 1The diagram shows the pump body structure for which the pump body production mold of the present invention is designed. The pump body 1 includes a pump casing 11 and a liquid outlet pipe 12. The pump casing 11 includes a first annular plate 111, a water inlet pipe 112, a housing 113, and a second annular plate 114, which are coaxially connected from bottom to top. The liquid outlet pipe 12 includes a water outlet pipe 121 connected to and communicating with the housing 113 and a third annular plate 122 connected to the end of the water outlet pipe 121. The first annular plate 111, the second annular plate 114, and the third annular plate 122 are all cylindrical in shape. The first annular plate 111... The inlet pipe 112, the housing 113, and the second annular plate 114 are hollow to form an inner cavity. The inner diameters of the first annular plate 111 and the inlet pipe 112 are the same and smaller than the inner diameter of the housing 113. The inner diameter of the housing 113 is smaller than the inner diameter of the second annular plate 114. The diameter of the inlet pipe 112 is less than the diameter of the third annular plate 122, less than the diameter of the first annular plate 111, less than the diameter of the housing 113, and less than the diameter of the second annular plate 114, so that the entire pump housing 11 presents a shape similar to a goblet. The diameter mentioned here refers to the outer diameter. One end of the water outlet pipe 121 is connected to the outer wall of the housing 113, and its inner cavity communicates with the inner cavity of the housing 113. The other end of the water outlet pipe 121 extends along the tangent direction at the point where the water outlet pipe 121 is connected to the housing 113, so that the included angle between the water outlet pipe 121 and the inner wall of the housing 113 is less than 90°. The third annular plate 122 is coaxially arranged on the other end of the water outlet pipe 121. The water outlet pipe 121 has a circular tube structure, and the water outlet pipe 121 is gradually widened from one end of the housing 113 to the other end. Therefore, when one end of the water outlet pipe 121 is connected to the housing 113, in order to ensure that the water outlet pipe 121 and the inner cavity of the housing 113 are connected, the water outlet pipe 121 is connected to the outer wall of the housing 113, and its inner cavity is connected to the outer wall of the housing 113. The connection between the water outlet pipe 121 and the housing 113 forms a triangular virtual space along the outer wall of the water outlet pipe 121 on the inner side of the connection. The side of the triangular virtual space facing the water outlet pipe 121 forms a shape with the middle part concave towards the center of the triangular virtual space. The triangular virtual space located at the angle between the water outlet pipe 121 and the housing 113 also forms a shape with the middle part concave towards the center of the triangular virtual space. Therefore, when the corresponding molding chamber is integrally formed with the mold, the third annular plate 122, the liquid outlet pipe 12, and the housing 113 will all become obstacles that restrict the mold from being peeled off from the triangular virtual space.

[0039] Reference Figures 2 to 11As shown, the pump body production mold of the present invention includes an upper mold 2, a middle mold 3, and a bottom mold 4 arranged sequentially from top to bottom, as well as a first mold core 5 and a second mold core 6. The upper mold 2, the middle mold 3, and the bottom surface together form a first cavity 71 that is consistent with and adapted to the outer contour of the pump housing 11. The first mold core 5 is located in the first cavity 71 and is consistent with and adapted to the inner contour of the pump housing 11. On one side of the upper mold 2 and the bottom surface facing each other, at the position corresponding to the outlet pipe 12 of the pump body 1, a second cavity 72 that is consistent with and adapted to the outer contour of the outlet pipe 12 is formed. The second cavity 72 is connected to the first cavity 71. The core 6 is disposed between the upper mold 2 and the bottom surface, with one end extending outward into the first cavity 71 and the second cavity 72. The end of the second mold core 6 extending into the first cavity 71 abuts against the first mold core 5. The inner contour of the second mold core 6 is consistent with that of the liquid outlet pipe 12 for matching. The first cavity 71, the second cavity 72, the first mold core 5, and the second mold core 6 together form a molding cavity 7. The inner and outer contours of the molding cavity 7 are consistent with those of the pump body 1. An inlet (not shown in the figure) communicating with the first cavity 71 is opened on one of the modules of the upper mold 2, the middle mold 3, and the bottom mold 4 to inject molten metal into the first cavity 71.

[0040] In use, molten metal is injected into the molding cavity 7 through the feed port. The molten metal gradually fills the molding cavity 7 from bottom to top until it is completely filled. The portion of the molten metal that fills the molding cavity 7 and adheres to the inner wall of the first cavity 71 forms the outer wall of the pump housing 11. The portion of the molten metal that adheres to the outer wall of the first mold core 5 forms the inner wall of the pump housing 11. The portion of the molten metal that adheres to the inner wall of the second cavity 72 forms the outer wall of the outlet pipe 12. The portion of the molten metal that adheres to the outer wall of the second mold core 6 forms the inner wall of the outlet pipe 12. The middle portion forms the complete pump body 1 after molding. Finally, the pump body 1 is demolded sequentially to complete the production of the pump body 1.

[0041] Reference Figure 3 , Figure 6 , Figure 7 As shown, a first through groove 211 is recessed upwards at the center of the bottom surface of the upper mold 2. The two ends of the first through groove 211 extend through the upper mold 2 with their backs to each other, so that both ends and the bottom surface of the first through groove 211 are open. The length direction of the first through groove 211 is parallel to one of the outer side walls of the upper mold 2. For ease of clear description of the orientation, the orientation of the two ends of the first through groove 211 is respectively positioned as the front side and the rear side. Figure 3The front end shown is the front side, and the length direction of the first through groove 211 is parallel to the left and right side walls of the upper part. The first through groove 211 has a "U"-shaped groove structure with a horizontal top surface and vertical side walls. The structure of the first through groove 211 is consistent with the structure of the upper part of the middle mold 3 so that the middle mold 3 can be inserted into the first through groove 211 in the vertical direction to correspond and fit, thereby making the connection between the upper mold 2 and the middle mold 3 tighter. A first groove 22 is formed on the top wall of the first through groove 211 facing the middle mold 3, which is consistent with the upper outer contour of the first annular plate 111 to be adapted. A first groove 31 is formed on the top surface of the middle mold 3 facing the first through groove 211, which is consistent with the lower outer contour of the first annular plate 111 to be adapted. (In this embodiment, the upper part of the first annular plate 111 refers to its upper half, and the lower part of the first annular plate 111 refers to its lower half. The upper half and lower half of the first annular plate 111 are not limited to two equally divided parts.) When the middle mold 3 is inserted into the first through groove 211, the first groove 22 on the upper mold 2 and the first groove 31 on the middle mold 3 together form a cavity with a shape consistent with the shape and structure of the first annular plate 111, thereby completing the deployment of the outer contour of the first annular plate 111.

[0042] On the bottom surface of the upper mold 2, on both sides of the first through groove 211, two second grooves 23 are respectively recessed and face away from each other. The two second grooves 23 are respectively directly opposite the two sides of the housing 113 and the second annular plate 114, and the outer contours of the portions of the housing 113 and the second annular plate 114 that they are facing are consistent with each other to fit together, thus serving as part of the deployment of the housing 113 and the second annular plate 114. The two second grooves 23 include a third groove segment and a fourth groove segment respectively adapted to the outer contours of portions of the second annular plate 114 and portions of the housing 113, so that the second grooves 23 are arc-shaped steps. The side of the second groove 23 facing the first through groove 211 is connected to the first through groove 211, and the bottom surface of the second groove 23 is open. A third-type groove 24 is recessed upward on the bottom surface of the upper mold 2 at the position corresponding to the outlet pipe 12. The third-type groove 24 is located to the right of the first through groove 211, and the inner wall of the third-type groove 24 is consistent with the outer contour of the outlet pipe 121 and the upper half of the third ring plate to fit together. The third-type groove 24 serves as part of the deployment of the outlet pipe 12. The third-type groove 24 includes a first groove segment with one end connected to the first through groove 211 and the second-type groove 23 and corresponding to the outlet pipe 121, and a second groove segment connected to the other end of the first groove segment. The second groove segment is coaxially distributed with the first groove segment and penetrates the upper mold 2 towards the right side of the upper mold 2. An upper baffle 25 is connected to the right side of the upper mold 2 to block the right side of the second groove segment.

[0043] Reference Figures 6 to 9As shown, preferably, a first movable block 26 is connected to a portion of the bottom surface of the upper mold 2 corresponding to the inner side of the connection between the liquid outlet pipe 12 and the housing 113. The first movable block 26 is located at the junction between the third groove 24 and the second groove 23 near the third groove 24, that is, at the junction of the second groove 23 and the third groove 24 near the right side, which corresponds exactly to the inner side where the liquid outlet pipe 12 and the housing 113 are connected. The bottom surface of the first movable block 26 is flush with the bottom surface of the upper mold 2 to have a first abutting surface 261 that is horizontal and flat, which is used to abut against the top surface of the bottom mold 4, so that the first movable block 26 can abut against the bottom mold 4 together with the upper mold 2. A first arc surface 262 is formed recessed on the upper part of the side of the first movable block 26 facing the third groove 24. The first arc surface 262 extends to the second cavity 72 corresponding to the third groove 24 and matches the outer contour of a part of the water outlet pipe 121. The bottom surface of the upper mold 2, which is provided with the third groove 24 and located on the right side of the first through groove 211, is divided into two surfaces by the third groove 24. The third movable block 63 is located on the first surface 271. In order to make the second groove 23 correspond to the second annular plate 114, the height of the second surface 272 is higher than the bottom surface of the other upper mold 2, thus forming a high and low surface, making the second groove 23 deeper. At the same time, it is convenient for the first movable block 26 to serve as the filling part inside the connection between the water outlet pipe 121 and the shell 113. The second surface 272 is just right. The first arc surface 262 extends to the bottom of the third groove 24, corresponding to the centerline of the water outlet pipe 121 in the vertical direction. The first arc surface 262 corresponds to a portion of the outline of the lower half of the water outlet pipe 12. The bottom mold 4 is complementary to the bottom surface of the upper mold 2. The first arc surface 262, the third groove 24 and the bottom mold 4 are arranged together to form the second cavity 72. The presence of the first movable block 26 does not affect the connection between the upper mold 2 and the bottom mold 4. If the height of the second surface 272 is made to match the height of the other bottom surfaces of the upper mold 2, then the inner wall of the third groove 24 corresponding to the second surface 272 needs to be adapted to the lower half of the outlet pipe 121. Thus, when the pump body 1 is formed and demolded, the edge of the second surface 272 facing the third groove 24 prevents the upper mold 2 from being peeled off vertically relative to the outlet pipe 12, while the structure of the second groove 23 restricts the peeling of the upper mold 2 off horizontally relative to the pump body 1. Therefore, it is necessary for the height of the second surface 272 to be higher than the other bottom surfaces of the upper mold 2, which can greatly reduce the demolding difficulty. The first arc surface 262 of the first movable block 26 corresponds to the lower half of the outlet pipe 121. However, since the first movable block 26 can be disassembled separately and is small in size, it can form part of the second cavity 72 without hindering the demolding of the outlet pipe 12 with the upper mold 2 and the bottom mold 4, thereby greatly reducing the demolding difficulty.

[0044] On the side of the first movable block 26 facing the first cavity 71, a second arc surface 263 is formed along the outer wall contour of the pump casing 11, which is consistent with the outer contour of the casing 113 and the second annular plate 114. On the second arc surface 263, a stepped fifth groove segment and a sixth groove segment are formed corresponding to the second annular plate 114 and the casing 113, respectively. The fifth groove segment and the third groove segment are continuous, and the sixth groove segment and the fourth groove segment are continuous, so that the second arc surface 263 together with the third groove segment and the fourth groove segment form one of the second grooves 23.

[0045] At the junction of the first movable block 26 and the second arc surface 262, corresponding to the inner side of the connection between the water outlet pipe 121 and the housing 113, in this embodiment, the first movable block 26 is formed by an arc at the junction of the inner side of the connection between the water outlet pipe 121 and the housing 113, with a first arc surface 264 that is adapted to a portion of the outer contour of the inner side of the connection between the water outlet pipe 121 and the housing 113. The first arc surface 264 divides the inner side of the connection between the water outlet pipe 121 and the housing 113 into three parts from top to bottom. The first arc surface 264 corresponds to the first part located at the bottom. The first movable block 26 can be peeled off vertically downward relative to the pump body 1 or horizontally away from the pump body 1 during demolding, so that the first movable block 26 can be demolded relative to the water outlet pipe 121 and the first part.

[0046] Preferably, a first engaging groove 28 is recessed on the bottom surface of the upper mold 2, on the side of the first movable block 26 away from the first cavity 71, facing outwards from the upper mold 2. The bottom surface of the first engaging groove 28 extends downwards through the mold 2, and the top surface of the first engaging groove 28 is at the same height as the second surface 272 of the bottom surface of the upper mold 2. The side of the first engaging groove 28 facing the third groove 24 extends to the third groove 24 to connect with the third groove 24, and the side of the first engaging groove 28 near the third groove 24 corresponds to the vertical direction of the liquid outlet pipe 12. The upward centerline ensures that a portion of the first surface 271 of the bottom surface of the upper mold 2 and the first movable block 26 are located between the second groove 23 and the first engaging groove 28. On the top surface of the bottom mold 4, corresponding to the position of the first engaging groove 28, a first engaging block 41 is formed that fits into the first engaging groove 28. On the top surface of the bottom mold 4, directly opposite the position of the second surface 272 of the bottom surface of the upper mold 2, a complementary boss 42 is formed, ensuring that the heights of the first engaging block 41 and the boss 42 are consistent. The first engaging block 41 has a third arc surface formed on one side of the liquid outlet pipe 12, which forms the second cavity 72. This third arc surface corresponds to the lower half of the liquid outlet pipe 12. A second engaging groove 43 is formed on the side of the first engaging block 41 facing the first cavity 71 and the top surface of the bottom mold 4, which complements the first engaging block 26 and the first surface 271 of the bottom of the upper mold 2. When the upper mold 2 and the bottom mold 4 are aligned and engaged, the top surface of the boss portion 42 is in contact with the second surface 272 of the bottom surface of the upper mold 2, and the first engaging block 41 is engaged with the first engaging block 26 and the corresponding part of the first surface 271 so that the first engaging block 41 abuts against the first engaging groove 43. Within the groove 28, the first movable block 26 and the portion of the first surface 271 corresponding to the bottom of the upper mold 2 are engaged within the second engaging groove 43, increasing the contact area and bonding strength between the upper mold 2 and the bottom mold 4. This ensures that after assembly, even if the upper mold 2 is not glued to the bottom mold 4, the upper mold 2 and the bottom mold 4 will not easily separate or become misaligned, thus avoiding problems. Simultaneously, the first engaging block 41, the upper mold 2, and the bottom mold 4 can also tightly engage the first movable block 26 after engagement, preventing the movable first movable block 26 from loosening. The first arc surface 262, the third arc surface, the first arc-shaped surface 264, the second arc surface 29, the third arc surface 381, the third groove 24 of the upper mold 2, and the bottom mold 4 together form the second cavity 72, facilitating demolding.

[0047] Furthermore, on the side of the first movable block 26 away from the second cavity 72, from the second groove 23 side to the first engaging groove 28 side, a first cross-section 273, a second cross-section 274, a third cross-section 275, a fourth cross-section 276, and a fifth cross-section 277 are sequentially formed in sequence. One end of the first cross-section 273 extends from the second groove 23 side toward the first engaging groove 28 side, the second cross-section 274 extends from the first cross-section 273 toward the second groove 23 side, and the third cross-section 275 extends from the second cross-section 274 toward the first engaging groove 28 side. The groove 28 extends to one side, the fourth section 276 extends from the third section 275 toward the side away from the third groove 24, the fifth section 277 extends from the fourth section 276 toward the side of the first engaging groove 28, and a first bend is formed at the connection between the first section 273 and the second section 274, and a second bend is formed at the connection between the second section 274 and the third section 275. The second section 274 is inclined relative to the first section 273 and the third section 275 so that the first bend and the second bend protrude in opposite directions to form an "S" shaped structure. A third bend is formed at the connection between the third section 275 and the fourth section 276, and a fourth bend is formed at the connection between the fourth section 276 and the fifth section 277. The fourth section 276 is inclined relative to the fifth section 277 and the third section 275 so that the third bend and the fourth bend protrude in opposite directions to form an "S" shaped structure. A slot is provided on the first surface 271 at the bottom of the upper mold 2. The top surface of the slot is flush with and connected to the top surface of the first engaging slot 28. The side of the slot facing each section is set along the outline of each section so that the position on the upper mold 2 corresponding to the first movable block 26 is adapted to the first movable block 26. That is, five sixth sections are also formed on the side of the slot facing each section. The direction and shape of the five sixth sections are the same as the sections of the first movable block 26. The horizontal distance between the first and fourth bends is less than the horizontal distance between the second and third bends, so that the entire first movable block 26 facing away from the third groove 24 and the first surface 271 of the bottom of the upper mold 2 facing the first movable block 26 respectively form complementary "Ω" shaped broken edges. The first and fourth bends cooperate with the third and fourth bends to restrict the movement of the first movable block 26 in the horizontal direction. At the same time, no matter what the shape of the first arc surface 262 is, the broken edges of the first movable block 26 will not be affected and can still retain the "Ω" shape. Since the mold is usually glued together after assembly to ensure sealing, the first movable block 26 is small in size and irregular in shape. Before it is glued, it is easy to detach from the upper mold 2, which will cause trouble for the assembly of the mold. However, the broken edge setting in this embodiment can be locked onto the upper mold 2. Even if the first movable block 26 is not glued to the upper mold 2, it will not easily fall off or shift in position, thus reducing trouble in the assembly process.

[0048] Reference Figure 6As shown, a second arc-shaped surface 29 is formed on the upper mold 2 at the junction between the third type groove 24 and the second type groove 23, and above the first movable block 26. The second arc-shaped surface 29 corresponds to the second part located in the middle of the inner side of the connection between the liquid outlet pipe 12 and the pump body 1. The bottom edge of the second arc-shaped surface 29 is flush with the top surface of the first engaging groove 28 so as to just connect with the top edge of the first arc-shaped surface 264. The top edge of the second arc-shaped surface 29 connects to the first through groove 211. The first arc-shaped surface 264 is curved downward in the vertical direction from one side of the first through groove 211 toward the first movable block 26 to form an arc shape, while the second arc-shaped surface 264 is curved downward in the vertical direction. The shape of the second arc surface 29 in the horizontal direction is similar to the shape of the inner side of the connection between the liquid outlet pipe 12 and the housing 113. One side of the arc surface 29 protrudes from the middle away from the first movable block 26, while the two sides are curved towards the third groove 24 and the second groove 23 respectively. This shape of the second arc surface 29 and the first movable block 26 together form two of the three parts. When the upper mold 2 is demolded, the second arc surface 29 is open downward and unobstructed on both sides. Therefore, it is only necessary to move the upper mold 2 upward to make the second arc surface 29 detach from the formed pump body 1, so as to facilitate the upper mold 2 to separate and demold from the connection between the liquid outlet pipe 12 and the housing 113.

[0049] Reference Figure 3 , Figure 4 , Figure 8 , Figure 9 and Figure 10 As shown, the middle mold 3 is sequentially formed with a fourth type groove 32 that matches the outer contour of the water inlet pipe 112 and a fifth type groove 33 that matches the outer contour of the shell 113 and other parts of the second annular plate 114. The fourth type groove 32 and the fifth type groove 33 are coaxial and connected to the first type grooves 22 and 31. The second type groove 23, as one of the deployments of the outer contour of the shell 113, together with the fifth type groove 33, forms a cavity that matches the outer contour of the shell 113. The second type groove 23 and the fifth type groove 33 corresponding to the parts of the shell 113 can form a complete deployment of the outer contour of the shell 113.

[0050] The middle mold 3 includes a front mold 34 and a rear mold 35 that can be interlocked, with the front mold 34 and rear mold 35 positioned on the front and rear sides respectively along the front-rear direction. On the upper part of the facing sides of the front mold 34 and rear mold 35, bosses extend towards each other and abut against each other to form a fourth type groove 32. A fourth type groove 32 is evenly divided into two and formed on the facing sides of the two bosses, so that a complete fourth type groove 32 is formed after the two bosses abut against each other. Similarly, a first type groove 31 is also evenly divided into two and formed on the top surfaces of the front mold 34 and rear mold 35, so that a complete first type groove 31 is formed on the middle mold 3 after the two bosses abut against each other. Also evenly divided into two are fifth type grooves 33 formed on the upper and lower surfaces of the front mold 34 and rear mold 35, so that a complete fifth type groove 33 is formed after the two bosses abut against each other. Furthermore, the left and right sides of the fifth type groove 33 are interconnected to connect with the second type groove 23 after the front mold 34 and the rear mold 35 are inserted into the first through groove 211. The front mold 34 is positioned close to the second cavity 72. At this time, the fifth type groove 33 and the second type groove 23 are connected to each other to jointly serve as part of the deployment housing 113 and the second annular plate 114. From top to bottom, the fifth type groove 33 corresponds to the seventh and eighth groove segments of the outer mold contour of the housing 113 and the second annular plate 114, so that the portion of the fifth type groove 33 corresponding to the housing 113 and the portion of the second type groove 23 corresponding to the housing 113 can form a complete deployment housing 113 outer contour.

[0051] It should be noted that a fourth movable block 36 is formed on the bottom of the opposing sides of both the front mold 34 and the rear mold 35. A slot 37 is horizontally formed on both the front mold 34 and the rear mold 35 corresponding to the fourth movable block 36. The fourth movable block 36 is connected to the slot 37. An arc-shaped surface complementary to the sixth type groove 45 is formed on the opposing side of the two fourth movable blocks 36. This allows the two fourth movable blocks 36 to be installed on the corresponding front mold 34 and rear mold 35, together forming a fifth type groove 33. Simultaneously, the arc-shaped surface facilitates the guidance of the middle mold 3 during mold assembly, enabling rapid installation with the bottom mold 4. The fourth movable block 36 can also be integrally formed on the middle mold 3.

[0052] Reference Figure 11As shown, the fifth groove 33 corresponding to the front mold 34 corresponds to the connection point between the liquid outlet pipe 12 and the housing 113. At the position of the fifth groove 33 of the front mold 34, corresponding to the top surface of the housing 113 and directly opposite the inner side of the third part of the connection, a downwardly protruding curved surface 381 is formed, matching the outer contour of the third part. The side of the third curved surface 381 closest to the third groove 24 connects to the second curved surface 29 after the front mold 34 is inserted into the first through groove 211, thus connecting the liquid outlet pipe... The inner part of the connection between 12 and the housing 113 is divided into three parts, thereby dividing the three vertically restrictive parts of the triangular virtual space of the pump body 1 into three parts. After the pump body 1 is formed, the first arc surface 264 can move upward or horizontally from the top of the triangular virtual space to detach from the pump body 1, while the second arc surface 29 can move upward from the top of the triangular virtual space to detach the upper mold 2 from the pump body 1, and the third arc surface 381 can detach from the pump body 1 downward or horizontally from the bottom of the triangular virtual space. Since the first groove 31, the fourth groove 32 and the fifth groove 33 of the front mold 34 and the rear mold 35 are all arranged facing each other, the middle mold 3 needs to be moved horizontally in the front and rear directions to be disassembled during demolding. The third arc surface 381 protrudes downward relative to the fifth groove 33, corresponding to the top surface of the housing 113. The third arc surface 381 itself will hinder the horizontal movement of the middle mold 3. Therefore, a second movable block 38 is provided on the front mold 34 of the middle mold 3 at a position corresponding to the third arc surface 381. The second movable block 38 is an independent part of the front mold 34 and can be disassembled separately. The second arc surface 29 is formed on the bottom surface of the second movable block 38. The top surface of the second movable block 38 is horizontal and abuts against the inner wall of the fifth groove 33 corresponding to the top surface of the housing 113. The side of the second movable block 38 facing the third groove 24 is flush with the side of the front mold 34 facing the third through groove, forming a second abutting surface 382 that is vertical and abuts against the side wall of the first through groove 211. When the second movable block 38 is inserted into the first through groove 211 along with the middle mold 3, the left and right sides of the middle mold 3 abut against the side walls of the first through groove 211, and the second abutting surface 382 also abuts against the first channel near the third groove 24. On one side wall, the third arc-shaped surface 381 of the second movable block 38, together with the first arc-shaped surface 29, forms the outline structure of a triangular virtual space to form the outer outline deployment inside the connection between the liquid outlet pipe 12 and the shell 113. At the same time, the middle mold 3 can move horizontally along the front and rear sides for demolding, while the second movable block 38 is demolded separately from the molding pump body 1. At this time, due to its volume and shape, the second movable block 38 can be demolded in all directions between vertically downward and horizontally. No part of the pump body 1 will become a resistance to the peeling of the second movable block 38.It should be noted that an eighth type groove is formed at the position of the front mold 34 corresponding to the connection between the liquid outlet pipe 12 and the housing 113, which is consistent with the outer contour of the outer side of the connection between the liquid outlet pipe 12 and the housing 113 to be adapted. The eighth type groove is connected to the fifth type groove 33. Since the pump body 1 part corresponding to the eighth type groove is located on the outer side of the connection, the liquid outlet pipe 12 corresponding to the eighth type groove can be directly peeled off in the horizontal direction when the front mold 34 is demolded.

[0053] Preferably, a limiting plate 39 is integrally formed on the opposite side of the front mold 34 and the rear mold 35. After the front mold 34 and the rear mold 35 are inserted into the first through groove 211, both limiting plates 39 are located outside the first through groove 211, and each side of the limiting plate 39 protrudes outward so that the length of each side of the limiting plate 39 is greater than the length of the corresponding side of the front mold 34. In order to provide a force point during demolding, the limiting plate 39 assists in the demolding of the middle mold 3.

[0054] Reference Figure 3 As shown, a second through groove 44 is recessed on the top surface of the bottom mold 4 at the position corresponding to the middle mold 3. The upper part of the middle mold 3 is inserted into the first through groove 211, while the remaining part of the middle mold 3 at the bottom is inserted into the second through groove 44, so that after the upper mold 2, the middle mold 3 and the bottom mold 4 are assembled, the middle mold 3 is fastened between the upper mold 2 and the bottom mold 4. On the top surface of the bottom mold 4, on both sides corresponding to the second through groove 44, a sixth type groove 45 is formed in a recessed manner facing away from each other, which is consistent with the outer contour of the other parts of the second annular plate 114 to be adapted. The two sixth type grooves 45 are respectively located on the left and right sides of the opening of the fifth type groove 33 of the middle mold 3. After the bottom of the middle mold 3 is inserted into the second through groove 44, the two ends of the sixth type groove 45 on the left side are respectively connected to the left side of the fifth type groove 33 of the middle mold 3, and the two ends of the sixth type groove 45 on the right side are respectively connected to the right side of the fifth type groove 33 of the middle mold 3. Thus, the sixth type groove 45 and the fifth type groove 33 form a complete circle at the part of the second annular plate 114 and together serve as part of the deployment of the second annular plate 114. In this embodiment, the third groove segment, the sixth groove segment, and the seventh groove segment together form the outer contour of the shell 113, and the fourth groove segment, the fifth groove segment, the eighth groove segment, and the sixth type groove 45 together form the outer contour of the second annular plate 114.

[0055] Reference Figure 3As shown, a seventh-type groove 46 is recessed downwards on the top surface of the bottom mold 4 at the position corresponding to the liquid outlet pipe 12, which is adapted to the outer contour of the water outlet pipe 121 and other parts of the third annular plate 122. The seventh-type groove 46 is formed between the boss portion 42 and the first engaging block 41 and connects to the sixth-type groove 45. The top side edges of the boss portion 42 and the first engaging block 41 facing each other are the center lines of the water outlet pipe 121 and the third annular plate 122 in the vertical direction, so that when demolding, the bottom mold 4 can be detached from the pump body 1 from below without being affected by the liquid outlet pipe 12. The seventh type trough 46 consists of a ninth trough segment corresponding to the water outlet pipe 121 and connected to the sixth type trough 45, and a tenth trough segment coaxial with and connected to the ninth trough segment. The ninth trough segment is engaged with the first trough segment, and the tenth trough segment is engaged with the second trough segment. Thus, after the upper mold 2 is engaged with the bottom mold 4, the boss portion 42 abuts against the second surface 272 of the upper mold 2, and the first engaging block 41 engages with the first engaging groove 28. The other bottom surfaces of the upper mold 2 and the other top surfaces of the bottom mold 4 abut against each other. At this time, the second type trough 23, the fifth type trough 33 and the sixth type trough 45 together form a cavity that is consistent with the outer contour of the second annular plate 114. The first arc surface 262, the third arc surface, the first arc surface 264, the second arc surface 29, the third arc surface 381, the third type trough 24 and the seventh type trough 46 together form a cavity that is consistent with the outer contour of the liquid outlet pipe 12. A lower baffle 48 is formed at the position of the bottom mold 4 corresponding to the seventh type groove 46, which engages and abuts with the upper baffle 25, so that the entire mold has baffles on both sides to block the seventh type groove 46.

[0056] A first through hole 212 is provided on the upper mold 2 at the position corresponding to the water inlet pipe 112, and the first through hole 212 penetrates the upper mold 2 in a vertical direction. The first mold core 5 includes an inner mold column 51 formed on the bottom mold 4 and protruding upward relative to the bottom mold 4 and formed in the sixth type groove 45, an inner mold sleeve 52 composed of multiple pieces and surrounding the inner mold column 51, and a first inner mold 53 passing through the first through hole 212 and extending into the fourth type groove 32. The top surface of the inner mold column 51 and the outer surface of the inner mold sleeve 52 are consistent with and adapted to the internal contour of the shell 113 and the second annular plate 114, thereby serving as part of the deployment of the inner cavity of the shell 113 and the second annular plate 114. The outer wall of the portion of the first inner mold 53 extending into the fourth type groove 32 is consistent with the internal contour of the water inlet pipe 112 for adaptation, and the end of the first inner mold 53 abuts against the top surface of the inner mold column 51. A cavity with a thickness consistent with the thickness of the first annular plate 111 and the water inlet pipe 112 is formed between the first inner mold 53 and the first type grooves 22, 31, and the fourth type groove 32. A connection is formed between the top surface of the inner mold column 51, the top surface of the inner mold sleeve 52, and the top wall of the fifth type groove 33, and the outer wall of the shell 113. The top surface has a uniform thickness cavity. Between the outer wall of the inner mold sleeve 52 and the side wall of the shell 113 and the second annular plate 114, there is a cavity with a thickness that is the same as the thickness of the corresponding side wall of the shell 113 and the second annular plate 114. This allows the first inner mold 53, the top surface of the inner mold column 51, the outer side surface of the inner mold sleeve 52, and the first cavity 71 to jointly form a cavity that is consistent with the internal contour of the pump shell 11. The pump shell 11 is formed after the metal liquid crystal feed port enters this cavity and is formed.

[0057] Preferably, the sixth type groove 45 is recessed around the inner mold column 51 at the position of the inner mold sleeve 52 to form an annular groove 47. The bottom of the inner mold sleeve 52 is inserted into the annular groove 47. The vertical distance between the bottom surface of the annular groove 47 and the top surface of the inner mold column 51 is equal to the height of the inner mold sleeve 52, so that the height of the top surface of the inner mold sleeve 52 is consistent with the height of the top surface of the inner mold column 51. The top surface of the inner mold column 51 is convexly formed at the position of the fourth type groove 32, extending into the fourth type groove 32. The first inner mold 53 abuts against the convex column 511, so that it is connected to the first inner mold 53 as part of the inner cavity of the water inlet pipe 112. Because the diameter of the inner cavity of the water inlet pipe 112 corresponding to the protrusion 511 is larger than the diameter of the inner cavity of the water inlet pipe 112 corresponding to the first inner mold 53, if the protrusion 511 is integrally formed on the first inner mold 53, the first inner mold 53 cannot pass through the first through hole 212 and enter the first cavity 71. In order to limit the depth of the first inner mold 53 extending into the fourth groove 32, the top of the first inner mold 53 extends to the outside of the through hole and has a first head 54 with a diameter larger than the through hole. The first head 54 abuts against the top surface of the upper mold 2, and the bottom end of the first inner mold 53 abuts against the protrusion 511. The inner mold sleeve 52 is formed by at least two modules, which facilitates assembly and disassembly.

[0058] A second through hole is formed on the opposing side surfaces of the upper baffle 25 and the lower baffle 48. The second through hole is formed when the upper baffle 25 and the lower baffle 48 abut together. The second mold core 6 includes a second inner mold 61 that passes through the second through hole and extends into the first cavity 71 and the second cavity 72, and a third movable block 63 that is connected to the end of the second inner mold 61 that extends into the first cavity 71 and abuts against the outer wall of the inner mold sleeve 52. The outer contour of the third movable block 63 is consistent with the inner contour of the connection between the water outlet pipe 121 and the pump housing 11 to fit together. A second engaging groove 521 is formed in the inner mold sleeve 52 at the position corresponding to the connection between the water outlet pipe 121 and the pump housing 11 for the third movable block 63 to engage therein, thereby positioning the first inner mold 53 to a certain extent. The second inner mold 61 gradually narrows from one end of the second perforation to one end of the second engaging groove 521 to maintain consistency with the internal contour of the inlet pipe 112. At the end of the second inner mold 61 furthest from the inner mold sleeve 52, it extends beyond the second perforation and forms a second head 62 with a diameter larger than the second perforation. This limits the depth of the second inner mold 61 within the second perforation and facilitates demolding through the second head 62. Due to the shape of the connection between the outlet pipe 12 and the housing 113, the end of the second inner mold 61 abutting against the inner mold sleeve 52 has a needle-like shape. Because the second inner mold 61 is gradually narrowing, a high-precision machine is required to ensure that the needle-like portion of the second inner mold 61 is completely fitted to the outer wall of the inner mold sleeve 52 and that the second inner mold 61 does not shift. Even a slight misalignment will affect the shape of the connection between the housing 113 and the outlet pipe 12 after molding, and may even lead to… The junction of the pump body 1 housing 113 and the outlet pipe 12 is blocked. Manual assembly introduces greater errors, making it difficult to ensure the needle tip of the second inner mold 61 is in the preset position of the inner mold sleeve 52. The third movable block 63 and the second engaging groove 521 ensure that the second inner mold 61 is in the preset position when the third movable block 63 engages with the second engaging groove 521. Furthermore, since the needle tip is integrally formed with the third movable block 63, the connection and integrity of the junction between the outlet pipe 12 and the housing 113 after molding are not compromised, thus guaranteeing the quality of the pump body 1. The molding cavity 7 is formed by the first inner mold 53, the top surface of the inner mold pillar 51, the outer surface of the inner mold sleeve 52, the first cavity 71, the second inner mold 61, the third movable block 63, and the second cavity 72.

[0059] Preferably, a first guide hole 73 is formed on the facing side surface of the first inner mold 53 and the inner mold pillar 51. When assembling the mold, a pin can be inserted into one of the first guide holes 73 to facilitate precise alignment and positioning of the first inner mold 53 and the inner mold pillar 51. Two second guide holes 74 are formed on the facing side surface of the upper mold 2 and the bottom mold 4. Similarly, when assembling the mold, pins are inserted into the two second guide holes 74 to ensure complete alignment between the upper mold 2 and the bottom mold, without any offset or skewing. Moreover, the two second guide holes 74 on the upper mold 2 and the bottom mold 4 are diagonally distributed to ensure alignment between the upper mold 2 and the bottom mold 4 while minimizing the number of second guide holes 74, thereby increasing efficiency and achieving horizontal positioning.

[0060] Preferably, locking grooves 75 are vertically formed on both sides of the upper mold 2 and the bottom mold 4 to secure the molds with retainers after assembly. The locking grooves 75 can be formed on the left and right sides or the front and back sides of the upper mold 2 and the bottom mold 4.

[0061] The working method of one embodiment of the pump body production mold of the present invention is as follows: First, the bottom mold 4 is placed on the workbench. After the bottom of the inner mold sleeve 52 is inserted into the annular groove 47 to complete the installation of the inner mold sleeve 52, the first inner mold 53 and the third movable block 63 are connected and installed on the bottom mold 4 through the side baffles. The second movable block 38 is connected to the front mold 34. After the front mold 34 and the rear mold 35 are respectively inserted into the second through groove 44 and aligned, the third movable block 63 is engaged with the second through groove. At groove 521, a pin is inserted into the first guide hole 73 on the inner mold column 51. Then, pins are inserted into the two second guide holes 74 of the bottom mold 4. The first movable block 26 is then engaged with the upper mold 2, aligning the two second guide holes 74 on the upper mold 2 with the two pins, and aligning the third groove 24 with the seventh groove 46. The upper mold 2 is then moved downwards so that the pins are inserted into the two second guide holes 74 on the upper mold 2. The pins ensure that the upper mold 2 and the bottom mold 4 are completely aligned vertically. Continue moving the upper mold 2 downwards until its bottom surface abuts against the top surface of the bottom mold 4. Finally, insert the first inner mold 53 into the through hole and insert the pin on the inner mold post 51 into the first guide hole 73 on the first inner mold 53. Continue until the first inner mold 53 abuts against the protrusion 511 to complete the mold assembly. After fixing the mold through the locking groove 75, inject molten metal into the forming cavity 7 through the feed port until the molten metal fills the forming cavity 7 and overflows the feed port. Then, block the feed port and wait for the molten metal to melt. Liquid cooling is used; after the molten metal is fully formed, the mold is flipped over so that the bottom mold 4 is on top, and the bottom mold 4 is removed. After peeling off the side baffles, the first inner mold 53 and the third movable block 63 are removed. The inner mold sleeve 52 is peeled off from the inner cavity of the pump body 1. Then, the rear side mold 35 is peeled off horizontally, and the second movable block 38 is removed from the front side mold 34. The front side mold 34 is then peeled off horizontally. After the first movable block 26 is peeled off the liquid pipe 12 and the upper mold 2, the pump body 1 is removed from the upper mold 2 to complete the demolding.

Claims

1. A pump body manufacturing mold, the pump body comprising a pump casing and a liquid outlet pipe, wherein the inner side of the connection between the liquid outlet pipe and the pump casing is divided into three parts, characterized in that: The system comprises an upper mold, a middle mold, and a bottom mold arranged sequentially. The middle mold includes a front mold and a rear mold that are interlocked, and a fourth movable block symmetrically disposed at the bottom of the front mold and the rear mold. The upper mold, the front mold, the rear mold, the fourth movable block, and the bottom mold together form a first cavity that is adapted to the outer contour of the pump housing. An inlet communicating with the first cavity is provided on one of the upper mold, the front mold, the rear mold, and the bottom mold. A first mold core portion adapted to the inner contour of the pump housing is provided in the first cavity. A second cavity adapted to the outer contour of the outlet pipe and communicating with the first cavity is jointly formed by the upper mold and the bottom mold at the position corresponding to the outlet pipe of the pump body. A second mold core portion extending into the first cavity and the second cavity and abutting against the first mold core portion is provided between the upper mold and the bottom mold. The second mold core portion is adapted to the inner contour of the outlet pipe. A molding cavity is jointly formed between the first cavity, the first mold core portion, the second cavity, and the second mold core portion. A first movable block is connected to the upper mold at a position corresponding to the inner side of the connection between the pump housing and the outlet pipe. The first movable block is located at the junction of the first cavity and the second cavity, and the bottom surface of the first movable block is flush with the bottom surface of the upper mold to have a first abutting surface that is horizontal and flat and used to abut against the top surface of the bottom mold. The upper part of the side of the first movable block facing the second cavity is recessed to form a first arc surface. The first arc surface, the upper mold and the bottom mold together form the second cavity. The side of the first movable block facing the first cavity is provided with a second arc surface that matches the outer wall contour of the pump housing. The second movable block at the junction of the first arc surface and the second arc surface corresponds to the first part of one of the three parts of the inner wall of the connection between the outlet pipe and the pump housing. The junction is curved to form a first arc surface that matches the contour of the first part. The junction on the upper mold located between the first cavity and the second cavity and above the first movable block corresponds to the second part of the inner wall of the connection between the liquid outlet pipe and the pump housing, and the junction bend forms a second arc-shaped surface that matches the contour of the second part; A second movable block is connected to the middle mold inside the first cavity. The side of the second movable block facing the second cavity is arranged flush with the side of the middle mold facing the second cavity to have a second abutting surface that is vertically planar and used to abut against the upper mold. The bottom surface of the second movable block corresponds to the third part of the inner wall of the connection between the liquid outlet pipe and the pump housing, and the bottom surface of the second movable block is curved to form a third arc-shaped surface that matches the contour of the third part.

2. The pump body production mold as described in claim 1, characterized in that: A first engaging groove with a downward through bottom is recessed on the bottom of the upper mold and on the side of the first movable block away from the first cavity, facing outwards from the upper mold. A first engaging block that matches the first engaging groove is protruding upwards on the top surface of the bottom mold at the position corresponding to the first engaging groove. A third arc surface for forming the second cavity is formed on the side surface of the first engaging block corresponding to the liquid outlet pipe. A second engaging groove that matches the bottom of the first movable block and the bottom of the upper mold is formed on the side surface of the first engaging block facing the first cavity and the top surface of the bottom mold. The first arc surface, the third arc surface, the first arc surface, the second arc surface, the third arc surface, the upper mold and the bottom mold together form the second cavity.

3. The pump body production mold as described in claim 2, characterized in that: On the side of the first movable block away from the second cavity, from the first cavity side to the first engaging groove side, a first cross-section, a second cross-section, a third cross-section, a fourth cross-section, and a fifth cross-section are sequentially connected. At the connection between the first cross-section and the second cross-section, and at the connection between the second cross-section and the third cross-section, a first bend and a second bend protruding in opposite directions are formed to combine and form an "S" shape. At the connection between the third cross-section and the fourth cross-section, and at the connection between the fourth cross-section and the fifth cross-section, a third bend and a fourth bend protruding in opposite directions are formed to combine and form an "S" shape. The upper mold is arranged to fit the first movable block at the position corresponding to the first movable block.

4. The pump body production mold as described in claim 3, characterized in that: The pump casing includes a first annular plate, an inlet pipe, a housing, and a second annular plate, which are coaxially connected sequentially from bottom to top. The outlet pipe includes an outlet pipe connected to and communicating with the housing and a third annular plate connected to the end of the outlet pipe. A first through groove is formed at the center of the bottom surface of the upper mold corresponding to the position of the middle mold. First grooves that fit the outer contour of the first annular plate are formed on the opposite side of the first through groove and the middle mold. The middle mold is inserted into the first through groove, and the two first grooves form a cavity consistent with the outer contour of the first annular plate. On the bottom surface of the upper mold... On both sides of the first through groove, a second groove is formed in a recessed manner, which is adapted to a portion of the outer contour of the shell and the second annular plate. On the bottom surface of the upper mold, a third groove is formed in a recessed manner corresponding to the position of the liquid outlet pipe, which is adapted to a portion of the outer contour of the water outlet pipe and the third annular plate. The third groove is connected to the second groove. The first movable block is located between the third groove and the second groove near the third groove. The second arc surface is adapted to a portion of the outer contour of the shell and the second annular plate, and the second arc surface and the upper mold together form the second groove. The intermediate mold has a fourth type groove that matches the outer contour of the water inlet pipe, and a fifth type groove that matches part of the outer contour of the shell and the second annular plate. The fourth type groove and the fifth type groove are coaxial and connected to the first type groove. The second type groove and the fifth type groove together form a cavity that matches the outer contour of the shell. The second movable block is located in the fifth type groove. The bottom mold has a second through groove recessed on the bottom surface corresponding to the bottom surface of the middle mold. The bottom of the middle mold is inserted into the second through groove. On the top surface of the bottom mold, on both sides of the second through groove, a sixth type groove is recessed and formed, which is adapted to a portion of the outer contour of the second annular plate. On the top surface of the bottom mold, at the position corresponding to the liquid outlet pipe, a seventh type groove is recessed downward and formed, which is adapted to a portion of the outer contour of the water outlet pipe and the third annular plate. The seventh type groove is connected to the sixth type groove. The second type groove, the fifth type groove, and the sixth type groove together form a cavity that is consistent with the outer contour of the second annular plate. The first arc surface, the third arc surface, the first arc-shaped surface, the second arc surface, the third arc surface, the third type groove, and the seventh type groove together form a cavity that is consistent with the outer contour of the liquid outlet pipe.

5. The pump body production mold as described in claim 4, characterized in that: The front and rear side molds of the middle mold extend towards each other and abut against each other on their opposite sides. The fourth groove is divided into two and formed on the abutting side surface of the front and rear molds respectively. The first groove is divided into two and formed on the top surface of the front and rear molds respectively. The fifth groove is divided into two and formed on the bottom surface of the front and rear molds respectively. The front mold is close to the second cavity. The second movable block is disposed on the front mold. The two fourth movable blocks are disposed at the bottom of the front and rear molds respectively.

6. The pump body production mold as described in claim 5, characterized in that: A first through hole is formed on the upper mold at the position corresponding to the water inlet pipe. The first mold core includes an inner mold column integrally formed on the bottom mold and protruding upward into the sixth groove, an inner mold sleeve composed of multiple pieces and surrounding the inner mold column, and a first inner mold that passes through the first through hole and extends into the fourth groove. The top surface of the inner mold column and the outer surface of the inner mold sleeve are adapted to the internal contours of the housing and the second annular plate. The outer wall of the portion of the first inner mold extending into the water inlet pipe is adapted to the internal contour of the water inlet pipe and abuts against the top surface of the inner mold column, so that the first inner mold, the top surface of the inner mold column, the outer surface of the inner mold sleeve, and the first cavity together form a cavity that is consistent with the internal contour of the pump housing.

7. The pump body production mold as described in claim 6, characterized in that: The sixth type groove is recessed around the inner mold post at the position of the inner mold sleeve to form an annular groove. The bottom of the inner mold sleeve is inserted into the annular groove, and the height of the top surface of the inner mold sleeve is the same as the height of the top surface of the inner mold post. The top surface of the inner mold post is protruding upward at the position of the fourth type groove to form a protruding post extending into the fourth type groove. The first inner mold abuts against the protruding post.

8. The pump body production mold as described in claim 7, characterized in that: The upper mold and the bottom mold are respectively provided with two side baffles that can abut against each other and block the second cavity. A second through hole is formed on the side surface of the two side baffles facing each other. The second mold core includes a second inner mold that passes through the second through hole and extends into the first cavity and the second cavity, and a third movable block that is connected to the end of the second inner mold that extends into the first cavity and abuts against the outer wall of the inner mold sleeve. The outer contour of the third movable block is adapted to the inner contour of the connection between the water outlet pipe and the pump housing. A second locking groove is formed on the inner mold sleeve at the position corresponding to the connection between the water outlet pipe and the pump housing for the third movable block to engage. The forming cavity is formed by the first inner mold, the top surface of the inner mold column, the outer side surface of the inner mold sleeve, the first cavity, the second inner mold, the third movable block and the second cavity together.

9. The pump body production mold as described in claim 8, characterized in that: A first guide hole is formed on the facing side of the first inner mold and the inner mold column; two second guide holes are formed on the facing side of the upper mold and the bottom mold, and the two second guide holes on the upper mold and the bottom mold are diagonally distributed.

10. The pump body production mold as described in claim 9, characterized in that: Locking grooves are vertically formed on both sides of the upper mold and the bottom mold.

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