A sand mold forming die for the sand core of the inner cavity of a butterfly valve

Abstract

The present invention discloses a sand mold forming die for the inner cavity core of a butterfly valve, which relates to the technical field of forming dies and includes a lower die mechanism. A vertical driving mechanism is fixedly installed between the outer walls of the lower die mechanism. In the present invention, after the heat conduction plate and the sealing plate are engaged with each other, a complete cooling groove channel can be formed between the first cooling groove and the second cooling groove. Under the action of the control valve, the connecting pipe can be connected to the cooling groove channel, so that dry ice can be transported into the channel. Moreover, the heat conduction plate can effectively transfer the heat at the top downward. When the dry ice contacts this heat, it can instantly vaporize, and during this vaporization process, the heat can be effectively adsorbed. Subsequently, the generated gas can be discharged from the output pipe. And by this cooling method, the cooling of the casting can be accelerated, effectively shortening the cooling time and thus improving the sound field efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of molding dies, and particularly to a sand mold molding die for the inner cavity sand core of a butterfly valve body. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple-structured regulating valve that can be used for the on-off control of a medium in a low-pressure pipeline. A butterfly valve refers to a valve whose closing member (valve flap or butterfly plate) is a disc and rotates around the valve shaft to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. It mainly functions as a cut-off and throttling in a pipeline. The opening and closing member of a butterfly valve is a disc-shaped butterfly plate that rotates around its own axis inside the valve body to achieve opening, closing, or regulation.

[0003] Sand mold casting is a widely used casting form. As the name implies, it is to manufacture a casting mold with sand. Sand mold casting requires placing a finished part model or a wooden model (pattern) in the sand, then filling the sand around the pattern, and after opening the mold and removing the pattern, the sand forms a casting mold.

[0004] In the prior art, for example, a coated sand molding die in Chinese Patent Application: CN 113134571 A includes a housing assembly, a temperature control assembly, and a feeding assembly. The housing assembly includes an upper die and a lower die, and the inner parts of the upper die and the lower die include a molding cavity; the temperature control assembly is placed inside the housing assembly and includes a temperature control sheet arranged at the end of the molding cavity and a temperature control channel placed inside the housing assembly and the temperature control sheet. The temperature control channel adjusts the temperature between the temperature control sheet and the inside of the housing assembly; the feeding assembly is connected to the housing assembly through a manifold valve and a runoff pipeline connecting each manifold valve. The coated sand molding die provided by the present invention can make the surface temperature of the casting balanced during the casting process through the temperature control assembly, and accelerate the cooling of the die after casting, thereby reducing the processing and casting time and saving costs. Since various modifiers need to be injected during the processing of coated sand and the addition times of the modifiers are different, a feeding assembly is provided to add the modifiers within a preset time, improving the production efficiency.

[0005] Although the above-mentioned equipment can reduce the processing and casting time, save costs, and add modifiers within a preset time to improve the production efficiency, when introducing high-temperature liquid into the interior of the sand mold, generally the coated sand mold is left stationary to cool naturally, which will lead to a long cooling time. Moreover, the coated sand mold after pouring is also left stationary to cool, which will result in a long cooling time for the casting, thereby affecting the production efficiency. Summary of the Invention

[0006] The purpose of the present invention is to provide a sand mold forming die for the sand core of the inner cavity of a butterfly valve, so as to solve the problem proposed in the above background technology that after the raw material injection of the equipment is completed, the internal castings are easily cooled naturally and statically, which easily leads to too long cooling time and affects the production efficiency.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A sand mold forming die for the sand core of the inner cavity of a butterfly valve, including a lower die mechanism, a vertical driving mechanism is fixedly installed between the outer surfaces of the lower die mechanism, two horizontal driving mechanisms are fixedly installed on the outer surface of the lower die mechanism, and a cooling mechanism is fixedly installed on one side of the outer wall of the lower die mechanism;

[0008] The cooling mechanism includes two mounting brackets, a dry ice box is fixedly installed between the tops of the two mounting brackets, an injection pipe is fixedly connected to the top of the dry ice box, a sealing plug is movably inserted between the inner surfaces of the injection pipe, a control valve is fixedly connected to the bottom of the dry ice box, and an output end of the control valve is fixedly connected to a connecting pipe.

[0009] Preferably, the lower die mechanism includes two support frames, two support columns are fixedly inserted at the bottoms of the two support frames, a sealing plate is fixedly installed on the tops of the two support frames, a first cooling groove is opened at the bottom of the inner wall of the sealing plate, a connection port is opened on one side of the outer wall of the sealing plate, an output pipe is fixedly connected to the output end of the connection port, and a dust-proof cover is fixedly connected to the output end of the output pipe.

[0010] Preferably, a heat conduction plate is movably embedded between the inner surfaces of the sealing plate, a second cooling groove is opened at the bottom of the heat conduction plate, two connecting blocks are fixedly installed on the outer surface of the heat conduction plate, and an embedding groove is opened on one side of the outer wall of each of the two connecting blocks.

[0011] Preferably, a first sliding groove is opened on one side of the outer wall of each of the two connecting blocks, a first sliding bar is slidably embedded in the inner surface of each of the two first sliding grooves, and a lower die is fixedly installed between the outer surfaces of the two first sliding bars.

[0012] Preferably, two fixing grooves are opened on one side of the outer wall of the lower die, a fixing block is movably embedded in the inner surface of each of the two fixing grooves, a side plate is fixedly installed between the outer surfaces of the two fixing blocks, and two second sliding bars are fixedly installed on the outer surface of the side plate.

[0013] Preferably, the vertical driving mechanism includes four sliding seats, a moving groove is opened in each of the four sliding seats, a first linkage plate is slidably embedded in each of the four moving grooves, an electric telescopic rod is fixedly installed in each of the four sliding seats, and the output ends of the four electric telescopic rods are fixedly connected to the bottom of the first linkage plate.

[0014] Preferably, an upper mold is fixedly installed between the outer walls of the four first linkage plates. An injection block is fixedly installed at the bottom of the upper mold, and two embedding blocks are fixedly installed on the outer wall of the upper mold.

[0015] Preferably, the left and right driving mechanism includes two U-shaped frames. A set of second sliding grooves are opened at the top of each of the two U-shaped frames, and sliders are slidably embedded in the inner walls of the two sets of second sliding grooves.

[0016] Preferably, a second linkage plate is fixedly installed between the outer walls of the two sets of sliders, and air cylinders are fixedly inserted on one side of the outer walls of the two second linkage plates.

[0017] Preferably, one side of the outer walls of the two connecting blocks is fixedly connected to one side of the outer walls of the two sets of sliding seats. The outer wall of the sealing plate is fixedly connected to one side of the outer walls of the two U-shaped frames. One side of the outer wall of the mounting frame is fixedly connected to one side of the outer wall of the sealing plate. The outer walls of the two embedding blocks are movably inserted into the inner parts of the embedding grooves. The output end of the connecting pipe is communicated with the input ends between the first cooling groove and the second cooling groove. The outer wall of the injection block is movably inserted into the inner parts of the lower mold and the side plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the present invention, under the action of the lower mold mechanism and the temperature reduction mechanism, first, after the heat conduction plate and the sealing plate are engaged with each other, a complete cooling groove channel can be formed between the first cooling groove and the second cooling groove. Under the action of the control valve, the connecting pipe and the cooling groove channel can be communicated, so as to convey dry ice into the channel. Moreover, the heat conduction plate can effectively transfer the heat at the top downward. When the dry ice contacts this heat, it can instantly vaporize, and the heat can be effectively adsorbed during this vaporization process. Subsequently, the generated gas can be discharged from the output pipe, and by this cooling method, the cooling process of the casting can be accelerated, thus effectively shortening the cooling time and further improving the sound field efficiency.

[0020] In the present invention, under the action of the lower mold mechanism and the left and right driving mechanism, first, the two air cylinders can drive the lower mold and the side plate to move in opposite directions respectively, so that the two are separated. The parting surface formed by the splicing of the molding modules with the fixed mold is simple, which is convenient for demolding. Moreover, the air cylinders can effectively remove the molding die from the overall equipment, so as to facilitate the removal of the product.

[0021] In the present invention, under the action of the lower die mechanism and the up-and-down driving mechanism, firstly, through the driving of the equipment itself, the equipment can be driven to perform self-adjustment processing, and the integrated production of injection molding, cooling, and demolding can effectively reduce the manual operation process, not only saving costs but also greatly improving the production efficiency of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional front view structure diagram of a sand mold forming mold for the sand core of the inner cavity of a butterfly valve valve body in the present invention;

[0023] Figure 2 It is a three-dimensional bottom view structure diagram of a sand mold forming mold for the sand core of the inner cavity of a butterfly valve valve body in the present invention;

[0024] Figure 3 It is a split view of the lower die mechanism in a sand mold forming mold for the sand core of the inner cavity of a butterfly valve valve body in the present invention;

[0025] Figure 4 It is a split view of the up-and-down driving mechanism in a sand mold forming mold for the sand core of the inner cavity of a butterfly valve valve body in the present invention;

[0026] Figure 5 It is a split view of the left-and-right driving mechanism in a sand mold forming mold for the sand core of the inner cavity of a butterfly valve valve body in the present invention;

[0027] Figure 6 It is a split view of the cooling mechanism in a sand mold forming mold for the sand core of the inner cavity of a butterfly valve valve body in the present invention;

[0028] Figure 7 It is a three-dimensional bottom view structure diagram of the temperature guiding plate structure in a sand mold forming mold for the sand core of the inner cavity of a butterfly valve valve body in the present invention.

[0029] In the figure: 1. Lower die mechanism; 101. Support frame; 102. Support column; 103. Sealing plate; 104. First cooling groove; 105. Connection port; 106. Output pipe; 107. Dust-proof cover; 108. Temperature guiding plate; 109. Second cooling groove; 110. Connection block; 111. Embedding groove; 112. First sliding groove; 113. First sliding bar; 114. Lower die; 115. Fixed groove; 116. Fixed block; 117. Side plate; 118. Second sliding bar;

[0030] 2. Up-and-down driving mechanism; 201. Sliding seat; 202. Moving groove; 203. First linkage plate; 204. Electric telescopic rod; 205. Upper die; 206. Injection molding block; 207. Embedding block;

[0031] 3. Left-and-right driving mechanism; 301. U-shaped frame; 302. Second sliding groove; 303. Slide block; 304. Second linkage plate; 305. Cylinder;

[0032] 4. Cooling mechanism; 401. Mounting bracket; 402. Dry ice box; 403. Injection pipe; 404. Sealing plug; 405. Control valve; 406. Connecting pipe. Embodiment

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0034] Refer to Figure 1 - Figure 7 As shown in the figure: A sand mold forming mold for the inner cavity core of a butterfly valve valve body includes a lower mold mechanism 1. An up-and-down driving mechanism 2 is fixedly installed between the outer surfaces of the lower mold mechanism 1. Two left-and-right driving mechanisms 3 are fixedly installed on the outer surface of the lower mold mechanism 1. A cooling mechanism 4 is fixedly installed on one side of the outer wall of the lower mold mechanism 1;

[0035] The cooling mechanism 4 includes two mounting brackets 401. A dry ice box 402 is fixedly installed between the tops of the two mounting brackets 401. The top of the dry ice box 402 is fixedly communicated with an injection pipe 403. A sealing plug 404 is movably inserted between the inner surfaces of the injection pipe 403. The bottom of the dry ice box 402 is fixedly communicated with a control valve 405. The output end of the control valve 405 is fixedly communicated with a connecting pipe 406;

[0036] First, under the action of the control valve 405, the connection between the connecting pipe 406 and the dry ice box 402 can be realized. And under this connection, the dry ice inside the dry ice box 402 can be effectively transported between the inner surfaces of the first cooling tank 104 and the second cooling tank 109. And through the injection pipe 403, dry ice raw materials can be added to the inside of the dry ice box 402. And the sealing plug 404 and the injection pipe 403 can be effectively inserted and engaged to keep the injection pipe 403 in a sealed state. Embodiment

[0037] According to Figures 1 - 3As shown in the figure, the lower die mechanism 1 includes two support frames 101. At the bottom of each of the two support frames 101, two support columns 102 are fixedly inserted. At the top of the two support frames 101, a sealing plate 103 is fixedly installed. At the bottom of the inner wall of the sealing plate 103, a first cooling groove 104 is opened. On one side of the outer wall of the sealing plate 103, a connection port 105 is opened. The output end of the connection port 105 is fixedly communicated with an output pipe 106. The output end of the output pipe 106 is fixedly communicated with a dust-proof cover 107. Between the inner surfaces of the sealing plate 103, a heat conduction plate 108 is movably embedded. At the bottom of the heat conduction plate 108, a second cooling groove 109 is opened. On the outer surface of the heat conduction plate 108, two connection blocks 110 are fixedly installed. On one side of the outer wall of each of the two connection blocks 110, an embedding groove 111 is opened. On one side of the outer wall of each of the two connection blocks 110, a first sliding groove 112 is opened. In the inner surfaces of the two first sliding grooves 112, first sliding strips 113 are slidably embedded. Between the outer surfaces of the two first sliding strips 113, a lower die 114 is fixedly installed. On one side of the outer wall of the lower die 114, two fixing grooves 115 are opened. In the inner surfaces of the two fixing grooves 115, fixing blocks 116 are movably embedded. Between the outer sides of the outer walls of the two fixing blocks 116, a side plate 117 is fixedly installed. On the outer surface of the side plate 117, two second sliding strips 118 are fixedly installed;

[0038] During use, when the device is in the process of forming, the heat generated can be effectively conducted to the bottom through the heat conduction plate 108. When this heat enters between the first cooling groove 104 and the second cooling groove 109, after the dry ice comes into contact with it, the heat is effectively adsorbed through the volatilization of the dry ice, thereby realizing the cooling treatment, and the generated mist can be output through the output end of the output pipe 106. The dust-proof cover 107 can be connected to the output pipe 106, effectively isolating the external dust outside and preventing it from entering the device and blocking the internal channels. Embodiment

[0039] According to Figures 2 - 7As shown in the figure, the up-and-down driving mechanism 2 includes four sliding seats 201. Moving grooves 202 are opened inside the four sliding seats 201. First linkage plates 203 are slidably embedded inside the four moving grooves 202. Electric telescopic rods 204 are fixedly installed inside the four sliding seats 201, and the output ends of the four electric telescopic rods 204 are fixedly connected to the bottoms of the first linkage plates 203. An upper mold 205 is fixedly installed between the outer surfaces of the four first linkage plates 203. An injection block 206 is fixedly installed at the bottom of the upper mold 205. Two embedding blocks 207 are fixedly installed on the outer surface of the upper mold 205. The left-and-right driving mechanism 3 includes two U-shaped frames 301. A set of second sliding grooves 302 are opened at the tops of the two U-shaped frames 301. Sliders 303 are slidably embedded on the inner surfaces of the two sets of second sliding grooves 302. Second linkage plates 304 are fixedly installed between the outer surfaces of the two sets of sliders 303. Cylinders 305 are fixedly inserted on one side of the outer walls of the two second linkage plates 304. One side of the outer walls of the two connecting blocks 110 is fixedly connected to one side of the outer walls of the two sets of sliding seats 201. The outer surface of the sealing plate 103 is fixedly connected to one side of the outer walls of the two U-shaped frames 301. One side of the outer wall of the mounting frame 401 is fixedly connected to one side of the outer wall of the sealing plate 103. The outer surfaces of the two embedding blocks 207 are movably inserted inside the embedding grooves 111. The output end of the connecting pipe 406 is communicated with the input ends between the first cooling groove 104 and the second cooling groove 109. The outer surface of the injection block 206 is movably inserted inside the lower mold 114 and the side plate 117;

[0040] First, under the action of the two cylinders 305, the lower mold 114 and the side plate 117 can be driven to move in opposite directions respectively. During the process of merging with each other, a complete notch can be formed, which becomes an injection molding groove. After merging, the two fixing blocks 116 can be movably embedded inside the fixing groove 115, and the connection between the side plate 117 and the lower mold 114 can be realized, so as to maintain the stable state of this connection.

[0041] Usage method and working principle of this device: At the beginning of the equipment operation, first, the four cylinders 305 can drive the four first linkage plates 203 and the upper mold 205 between them to move downward through their own flexibility, so as to keep the injection block 206 and the bottom mutually embedded and engaged. Subsequently, raw materials are injected into the cavity through an external injection device. After the raw material injection is completed, a high temperature will be generated, and under the transfer of the heat conduction plate 108, this heat can be effectively transferred to the bottom, and the heat can effectively stay between the inner walls of the first cooling tank 104 and the second cooling tank 109. Dry ice can be poured into the dry ice box 402 through the injection pipe 403 for storage. After pouring is completed, the sealing plug 404 is movably inserted into the injection pipe 403 to maintain the sealing line of the injection pipe 403 and effectively prevent dust from entering the dry ice box 402. Subsequently, by opening the control valve 405, the connecting pipe 406 and the dry ice box 402 are connected. Then, the dry ice is transported and enters between the inner walls of the first cooling tank 104 and the second cooling tank 109. After contacting this heat, it volatilizes and adsorbs heat, thereby continuously cooling the equipment. The mist generated during the dust process can be discharged through the output pipe 106 on the other side. The function of the dust-proof cover 107 is to connect with the output pipe 106, which can effectively isolate the external dust outside and prevent it from entering the equipment and blocking the internal channel. When the injection product is cooled, under the action of the two cylinders 305, the lower mold 114 and the side plate 117 can be driven to move in opposite directions respectively to realize the separation between them, and the product is placed inside the lower mold 114. Subsequently, the cylinder 305 drives the lower mold 114 to move outward, so that the lower mold 114 and the internal product are removed from the inside of the overall equipment, which is convenient for the staff to take out the cooled product outside. After the lower mold 114 and the side plate 117 are combined, the two fixing blocks 116 can be movably inserted into the fixing grooves 115 to realize the connection between the side plate 117 and the lower mold 114, thereby maintaining the stable state of this connection. The equipment integrates injection, cooling, and demoulding, which can effectively reduce the manual operation process, not only saving costs but also greatly improving the production efficiency of products.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand mold forming die for the sand core of the inner cavity of a butterfly valve, characterized in that: It includes a lower die mechanism (1), between the outer walls of the lower die mechanism (1), an up-and-down driving mechanism (2) is fixedly installed, on the outer walls of the lower die mechanism (1), two left-and-right driving mechanisms (3) are fixedly installed, and on one side of the outer wall of the lower die mechanism (1), a cooling mechanism (4) is fixedly installed; the cooling mechanism (4) includes two mounting brackets (401), between the tops of the two mounting brackets (401), a dry ice box (402) is fixedly installed, on the top of the dry ice box (402), an injection pipe (403) is fixedly communicated, between the inner walls of the injection pipe (403), a sealing plug (404) is movably inserted, on the bottom of the dry ice box (402), a control valve (405) is fixedly communicated, and the output end of the control valve (405) is fixedly communicated with a connecting pipe (406); The lower die mechanism (1) includes two support frames (101), at the bottoms of the two support frames (101), two support columns (102) are fixedly inserted, on the tops of the two support frames (101), a sealing plate (103) is fixedly installed, at the bottom of the inner wall of the sealing plate (103), a first cooling groove (104) is opened, on one side of the outer wall of the sealing plate (103), a connection port (105) is opened, and the output end of the connection port (105) is fixedly communicated with an output pipe (106), and the output end of the output pipe (106) is fixedly communicated with a dust-proof cover (107); Between the inner walls of the sealing plate (103), a heat conduction plate (108) is movably embedded, at the bottom of the heat conduction plate (108), a second cooling groove (109) is opened, on the outer wall of the heat conduction plate (108), two connection blocks (110) are fixedly installed, and on one side of the outer walls of the two connection blocks (110), embedding grooves (111) are opened; On one side of the outer walls of the two connection blocks (110), first sliding grooves (112) are opened, between the inner walls of the two first sliding grooves (112), first sliding strips (113) are slidably embedded, and between the outer walls of the two first sliding strips (113), a lower die (114) is fixedly installed; On one side of the outer wall of the lower die (114), two fixing grooves (115) are opened, between the inner walls of the two fixing grooves (115), fixing blocks (116) are movably embedded, and between the outer walls of the two fixing blocks (116), a side plate (117) is fixedly installed, and on the outer wall of the side plate (117), two second sliding strips (118) are fixedly installed; The up-and-down driving mechanism (2) includes four sliding seats (201), inside each of the four sliding seats (201), a moving groove (202) is opened, inside each of the four moving grooves (202), a first linkage plate (203) is slidably embedded, inside each of the four sliding seats (201), an electric telescopic rod (204) is fixedly installed, and the output ends of the four electric telescopic rods (204) are fixedly connected to the bottom of the first linkage plate (203); An upper mold (205) is fixedly installed between the outer walls of the four first linkage plates (203). An injection block (206) is fixedly installed at the bottom of the upper mold (205). Two embedding blocks (207) are fixedly installed on the outer wall of the upper mold (205). The left - right driving mechanism (3) includes two U - shaped frames (301). A set of second sliding grooves (302) are opened at the top of each of the two U - shaped frames (301). Sliders (303) are slidably embedded in the inner walls of the two sets of second sliding grooves (302). A second linkage plate (304) is fixedly installed between the outer walls of the two sets of sliders (303). A cylinder (305) is fixedly inserted on one side of the outer wall of each of the two second linkage plates (304). One side of the outer walls of the two connecting blocks (110) is fixedly connected to one side of the outer walls of the two sets of sliding seats (201). The outer wall of the sealing plate (103) is fixedly connected to one side of the outer walls of the two U - shaped frames (301). One side of the outer wall of the mounting frame (401) is fixedly connected to one side of the outer wall of the sealing plate (103). The outer walls of the two embedding blocks (207) are movably inserted into the interior of the embedding grooves (111). The output end of the connecting pipe (406) is communicated with the input ends between the first cooling groove (104) and the second cooling groove (109). The outer wall of the injection block (206) is movably inserted into the interior of the lower mold (114) and the side plate (117).

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