Mold for sand shell preparation
By introducing sealing components and clamping mechanisms into the sand shell preparation mold, the problem of poor mold sealing was solved, achieving tight connection and efficient molding during the sand shell forming process, avoiding leakage, and improving the preparation quality and efficiency.
Patent Information
- Application Number
- CN202512031318.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-02-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing sand shell preparation molds have poor sealing properties during the grouting process, which leads to leakage of sand or grout, affecting the molding quality and causing waste of raw materials.
A mold mechanism was designed, including a sealing element and a clamping mechanism. By combining a sealing top cover, a sealing bottom cover, a sealing fastener, a sealing pressure strip, and a sealing rubber strip, along with a guide limiting post and a guide slide, the tight connection and sealing performance of the mold during the grouting process are ensured.
It effectively prevents the leakage of sand and slurry, improves the sealing performance and stability of the mold, ensures the molding quality of the sand shell, and reduces raw material waste.
Smart Images
Figure CN121492201A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of sand shell preparation, in particular to a mold for sand shell preparation. BACKGROUND
[0002] Sand shell products are widely used in the fields of building decoration, handicraft manufacturing, gardening landscape, etc. due to their environmental protection, low cost, unique texture and other advantages. In the sand shell preparation process, the mold is a core component that determines the sand shell forming quality, production efficiency and product consistency.
[0003] The existing simple splicing type mold has poor sealing at the splicing part, and in the sand shell injection molding process, sand or slurry leakage phenomenon is easy to occur, which not only affects the sand shell forming quality, but also causes raw material waste. In view of the above problems, a mold for sand shell preparation is proposed. SUMMARY
[0004] The purpose of the present application is to provide a mold for sand shell preparation to solve the problem of sand or slurry leakage phenomenon during operation of the existing technology, which not only affects the sand shell forming quality, but also causes raw material waste.
[0005] To achieve the above purpose, the present application provides the following technical scheme: a mold for sand shell preparation, comprising a mold mechanism, a sealing element is arranged on the outer side of the mold mechanism, a pressing mechanism is arranged on the outer side of the sealing element, the mold mechanism comprises a plurality of outer shell bodies and inner shell bodies, the outer shell bodies are arranged on the outer side of the inner shell bodies; The sealing element comprises a sealing top cover and a sealing bottom cover, the sealing top cover is arranged on the top of the outer shell body, the sealing bottom cover is arranged on the bottom of the outer shell body, sealing fasteners are fixedly installed at the four corners of the sealing top cover and the sealing bottom cover, a sealing pressing strip is arranged between the two sealing fasteners, a sealing rubber strip is fixedly installed on the inner side of the sealing pressing strip, the sealing top cover and the sealing bottom cover are used to provide sealing for the top and bottom of the mold mechanism, and the sealing fasteners, the sealing pressing strip and the sealing rubber strip are pressed on the four corners of the side surface of the outer shell body to provide sealing.
[0006] Preferably, the pressing mechanism comprises an upper pressing plate and a lower pressing plate, clamping air cylinders are symmetrically arranged on the upper pressing plate and the lower pressing plate, guide support columns are fixedly installed at the four corners between the upper pressing plate and the lower pressing plate, and the output ends of the clamping air cylinders are respectively connected to the top of the sealing top cover and the bottom of the sealing bottom cover.
[0007] Preferably, a guide sliding groove is formed on the outer side of the guide support column, a sliding block is slidably connected to the inner side of the guide sliding groove, an installation frame is connected to the outer side of the sliding block, and the installation frame is arranged on the outer side of the guide support column.
[0008] Preferably, one side of the mounting frame is threadedly connected with an adjusting screw rod, the bottom of the adjusting screw rod is provided with a motor, the side edges of the mounting frame are each provided with a side pushing cylinder, the output end of the side pushing cylinder is provided with a pressing plate, one side of the pressing plate is provided with a plurality of limiting blocks, the other side of the pressing plate is symmetrically and fixedly connected with a guide plate, one end of the guide plate is movably penetrated into the side of the mounting frame.
[0009] Preferably, an operation notch is formed through the upper pressing plate, a plurality of guide rods are movably penetrated through the upper pressing plate and the lower pressing plate, and one end of each guide rod is connected to the top of the sealing top cover and the bottom of the sealing bottom cover, respectively.
[0010] Preferably, a through hole is formed through the middle of the sealing top cover, and the one end of the sealing fastener is fixedly connected with a butt joint pressing strip, which is pressed on both ends of the sealing pressing strip.
[0011] Preferably, guide limiting columns are fixedly installed at the bottom four corners of the sealing top cover and the top four corners of the sealing bottom cover, and the guide limiting columns are respectively inserted and connected to the upper and lower ends of the outer shell.
[0012] Preferably, a feeding pipe is connected to the inner side top of the inner shell, a pouring cup is arranged at the top of the feeding pipe, a plurality of pouring openings are formed through the side of the inner shell, and the pouring openings are in communication with the inside of the feeding pipe.
[0013] Preferably, butt joint holes are symmetrically formed at the upper and lower ends of the outer shell, and the butt joint holes are connected with the guide limiting columns.
[0014] Preferably, sealing grooves are formed at the two sides of the outer shell, sealing strips are embedded in the inner sides of the sealing grooves, annular sealing rings are arranged at the upper and lower ends of the outer shell, and a limiting notch is formed in the side of the outer shell.
[0015] Compared with the prior art, the present application has the following advantages: 1、In the present application, the sealing top cover and the sealing bottom cover are connected to the upper and lower ends of the outer shell, which facilitates providing the covering effect at the end, the sealing fastener is arranged at the four corners of the sealing top cover and the sealing bottom cover, and the butt joint pressing strip is connected to the end, which facilitates providing the pressing and limiting function for the sealing pressing strip, the inner side of the sealing pressing strip is provided with a sealing rubber strip, which is beneficial to providing the sealing effect at the connection of the outer shell, preventing the leakage of yarn and slurry during the process of slurry forming, the guide limiting columns are arranged on the sealing top cover and the sealing bottom cover and connected with the butt joint holes formed on the outer shell, which makes the connection between the outer shells more compact, and the sealing top cover and the sealing bottom cover are tightly covered, so that the sealing performance is further improved, and the stable use of the mold is ensured.
[0016] 2、The present application, through the upper and lower pressing plate distribution in the upper and lower ends, and the corner between the two connecting with the guide support column for support, and provide guidance function, opening in the upper pressing plate operating slot convenient to provide grouting operation, clamping cylinder is arranged on the upper pressing plate and the lower pressing plate, and with the sealing top cover and sealing bottom cover is connected, convenient for control its to adjust the height, and realize the function of butt joint sealing. Through the guide rod in the process of lifting adjustment provides the direction, to ensure the stability and accuracy in the process of adjustment. The guide support column is provided with a guide sliding groove and the inner side is connected with a sliding block, and is connected with the inside of the mounting frame, which helps to provide lifting guide function, the outside of the mounting frame is screw connected with the adjusting screw rod, and the bottom end of the adjusting screw rod is provided with motor drive control lifting adjustment, which is convenient for adjusting the height according to the operation condition, which is convenient for installing and dismounting the mold, and improves the operation convenience while ensuring the stability of the tight connection. Side push cylinder is distributed in the inside of mounting frame, and is connected with upper pressing plate and limit block in the output end, convenient for controlling the extension and contraction of side push cylinder to make pressing plate extrude on the outside of the shell, while the limit block provides further positioning effect, improves the stability, makes the mold tightly connected. The guide plate can provide guiding effect in the process of use.
[0017] 3、The present application, through the interface hole and the guide limit column are connected, and provide accurate butt joint limit function, improve the tightness between the structure. The sealing groove is connected with the sealing strip, which is conducive to improving the sealing performance of the side connection. The annular sealing ring is arranged on the upper and lower ends of the shell, which is conducive to improving the sealing performance between the sealing top cover and the sealing bottom cover, thereby improving the quality of preparation, effectively preventing leakage, and avoiding waste. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a three-dimensional structure schematic diagram of a mold for sand shell preparation of the application; Figure 2 It is an exploded structure schematic diagram of a mold for sand shell preparation of the application; Figure 3 It is an enlarged structure schematic diagram of A in the application; Figure 2 It is an enlarged structure schematic diagram of B in the application; Figure 4 Figure 2 It is an enlarged structure schematic diagram of B in the application; Figure 5 It is a pressing mechanism structure schematic diagram of a mold for sand shell preparation of the application; Figure 6 It is another angle structure schematic diagram of a pressing mechanism of a mold for sand shell preparation of the application; Figure 7 This is a schematic diagram of the clamping mechanism of a mold for preparing sand shells according to the present invention. Figure 8 For the present invention Figure 7 A magnified structural diagram at point C in the diagram.
[0019] In the picture: 1. Mold Mechanism; 101. Outer Shell; 102. Inner Shell; 103. Feed Pipe; 104. Sprue Cup; 105. Butt Hole; 106. Sealing Groove; 107. Sealing Strip; 108. Annular Sealing Ring; 109. Casting Gate; 110. Limiting Groove; 2. Sealing Components; 201. Sealing Top Cover; 202. Sealing Bottom Cover; 203. Through Hole; 204. Sealing Fastener; 205. Butt Joint Pressure Strip; 206. Guide Limiting Post; 207. Sealing strip; 208. Sealing rubber strip; 3. Pressing mechanism; 301. Upper pressure plate; 302. Lower pressure plate; 303. Operating slot; 304. Clamping cylinder; 305. Guide rod; 306. Guide support column; 307. Guide slide; 308. Sliding block; 309. Mounting frame; 310. Adjusting screw; 311. Motor; 312. Side push cylinder; 313. Pressing plate; 314. Limiting block; 315. Guide plate. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Example 1: As Figures 1-8 As shown, the present invention provides a technical solution: a mold for preparing sand shells, including a mold mechanism 1, a sealing element 2 is provided on the outside of the mold mechanism 1, a pressing mechanism 3 is provided on the outside of the sealing element 2, the mold mechanism 1 includes a plurality of outer shells 101 and inner shells 102, the outer shells 101 are provided on the outside of the inner shells 102; The sealing member 2 comprises a sealing top cover 201 and a sealing bottom cover 202, the sealing top cover 201 is arranged at the top of the outer shell 101, the sealing bottom cover 202 is arranged at the bottom of the outer shell 101, the four corners of the sealing top cover 201 and the sealing bottom cover 202 are fixedly installed with sealing fasteners 204, a sealing pressing strip 207 is arranged between the two sealing fasteners 204, the inner side of the sealing pressing strip 207 is fixedly installed with a sealing rubber strip 208, the sealing top cover 201 and the sealing bottom cover 202 are used to seal the top and bottom of the mold mechanism 1, the sealing fasteners 204, the sealing pressing strip 207 and the sealing rubber strip 208 are pressed on the four corners of the side of the outer shell 101 to provide sealing, a through hole 203 is formed in the middle of the sealing top cover 201, one end of the sealing fastener 204 is fixedly connected with a butt joint pressing strip 205, the butt joint pressing strip 205 is pressed on both ends of the sealing pressing strip 207, the bottom corners of the sealing top cover 201 and the top corners of the sealing bottom cover 202 are fixedly installed with guide limiting columns 206, and the guide limiting columns 206 are respectively inserted and connected to the upper and lower ends of the outer shell 101.
[0022] In the embodiment, the outer shell 101 is arranged outside the inner shell 102, and a gap is arranged between the two, so as to provide space for the sand shell grouting forming and sand shell preparation work. The sealing top cover 201 and the sealing bottom cover 202 are connected to the upper and lower ends of the outer shell 101, so as to provide the effect of sealing the end. The through hole 203 is arranged in the middle of the sealing top cover 201 and communicates with the position of the pouring cup 104, so as to facilitate the pouring cup 104 to perform the grouting work. The sealing fastener 204 is arranged at the four corners of the sealing top cover 201 and the sealing bottom cover 202, and the butt joint pressing strip 205 is connected at the end, so as to provide the function of pressing and limiting the sealing pressing strip 207, and the inner side of the sealing pressing strip 207 is provided with the sealing rubber strip 208, which is beneficial to providing the sealing effect at the connection of the outer shell 101, preventing the leakage of yarn and slurry during the grouting forming process. The guide limiting column 206 is arranged on the sealing top cover 201 and the sealing bottom cover 202 and connected with the butt joint hole 105 arranged on the outer shell 101, so that the connection between the outer shell 101 is more compact, and the sealing top cover 201 and the sealing bottom cover 202 are tightly covered, so that the sealing performance is further improved, and the stable use of the mold is ensured.
[0023] Embodiment 2: as Figures 5-8As shown, the pressing mechanism 3 comprises an upper pressing plate 301 and a lower pressing plate 302, the upper pressing plate 301 and the lower pressing plate 302 are symmetrically provided with clamping air cylinders 304, four corner fixed mounting guide support columns 306 are arranged between the upper pressing plate 301 and the lower pressing plate 302, the output ends of the clamping air cylinders 304 are connected to the top of the sealing top cover 201 and the bottom of the sealing bottom cover 202 respectively, a guide sliding groove 307 is formed on the outer side of the guide support column 306, a sliding block 308 is slidably connected to the inner side of the guide sliding groove 307, an installation frame 309 is connected to the outer side of the guide support column 306, an adjusting screw rod 310 is threadedly connected to one side of the installation frame 309, a motor 311 is arranged at the bottom of the adjusting screw rod 310, side pushing air cylinders 312 are arranged on the side edges of the installation frame 309, a pressing plate 313 is arranged at the output end of the side pushing air cylinder 312, a plurality of limiting blocks 314 are arranged on one side of the pressing plate 313, guide plates 315 are symmetrically and fixedly connected to the other side of the pressing plate 313, one end of the guide plate 315 is movably penetrated through the side of the installation frame 309, an operation notch 303 is formed through the upper pressing plate 301, and a plurality of guide rods 305 are movably penetrated through the upper pressing plate 301 and the lower pressing plate 302, one end of the guide rod 305 is connected to the top of the sealing top cover 201 and the bottom of the sealing bottom cover 202 respectively.
[0024] In this embodiment, the upper pressing plate 301 and the lower pressing plate 302 are distributed at the upper and lower ends, and the corner between the two is connected with the guide support column 306 for support and provides a guide function, the operation notch 303 is formed on the upper pressing plate 301 to facilitate grouting operation, the clamping air cylinder 304 is arranged on the upper pressing plate 301 and the lower pressing plate 302, and is connected with the sealing top cover 201 and the sealing bottom cover 202, which is convenient for controlling the lifting adjustment, and is conducive to height adjustment according to the operation steps and realizes the function of butt sealing. The guide rod 305 provides guidance during lifting adjustment to ensure stability and accuracy during adjustment. The guide sliding groove 307 is formed on the guide support column 306, and the sliding block 308 is slidably connected to the inner side of the guide sliding groove 307, and is connected with the inner side of the installation frame 309, which helps to provide lifting guide function, the outer side of the installation frame 309 is threadedly connected with the adjusting screw rod 310, and the bottom end of the adjusting screw rod 310 is provided with the motor 311 to drive and control lifting adjustment, which is convenient for adjusting the height according to the operation condition, and is conducive to installing and dismounting the mold, and improves the operation convenience while ensuring the stability of the tight connection. The side pushing air cylinder 312 is distributed on the inner side of the installation frame 309, and the pressing plate 313 and the limiting block 314 are connected at the output end, which is convenient for controlling the extension and contraction of the side pushing air cylinder 312 to make the pressing plate 313 extrude on the outer side of the shell 101, and the limiting block 314 provides further positioning effect to improve stability and make the molds tightly connected. The guide plate 315 can provide a guiding effect during use.
[0025] Embodiment 3: as shown in Figures 1-4 The inner side top of the inner shell 102 is connected with the feeding pipe 103, the top of the feeding pipe 103 is provided with the pouring cup 104, a plurality of pouring openings 109 are provided through the side of the inner shell 102, the pouring openings 109 are connected with the inside of the feeding pipe 103, the upper and lower ends of the outer shell 101 are symmetrically provided with the butt joint holes 105, the butt joint holes 105 are connected between the guide limiting columns 206, the two sides of the outer shell 101 are provided with the sealing grooves 106, the inner side of the sealing grooves 106 is embedded with the sealing strips 107, the upper and lower ends of the outer shell 101 are provided with the annular sealing rings 108, and the side of the outer shell 101 is provided with the limiting grooves 110.
[0026] In the embodiment, the feeding pipe 103 is arranged at the inner side top of the inner shell 102 and is connected with the pouring openings 109, the top of the feeding pipe 103 is provided with the pouring cup 104 which is connected with the inside of the feeding pipe 103, so as to facilitate the addition of slurry to the inside for molding work. The butt joint holes 105 are connected between the guide limiting columns 206 and provide the function of precise butt joint limiting, which improves the tightness between the structures. The sealing grooves 106 are connected with the sealing strips 107, which is beneficial to improve the sealing performance of the side connection. The annular sealing rings 108 are arranged at the upper and lower ends of the outer shell 101, which helps to improve the sealing performance between the connection of the sealing top cover 201 and the sealing bottom cover 202, thereby being beneficial to ensure the quality of preparation, effectively prevent the leakage, and avoid the waste.
[0027] In the present application, the mold for sand shell preparation is used, first by setting the outer shell 101 on the outside of the inner shell 102, and a gap is provided between the two, which is convenient for providing space for the grouting forming of the sand shell, and the sand shell preparation work is carried out, the feeding pipe 103 is arranged on the inside top of the inner shell 102, and is communicated with the pouring port 109, the feeding pipe 103 is provided with a pouring cup 104 which is communicated with the inside of the feeding pipe 103, so as to facilitate the addition of slurry to the inside for forming work. The connecting hole 105 is connected between the guide limiting column 206, and the function of providing precise butt joint limiting is provided, which improves the tightness between the structures. The sealing groove 106 is connected with the sealing strip 107, which is conducive to improving the sealing performance of the side connection. The annular sealing ring 108 is arranged on the upper and lower ends of the outer shell 101, which helps to improve the sealing performance between the sealing top cover 201 and the sealing bottom cover 202. The sealing top cover 201 and the sealing bottom cover 202 are connected on the upper and lower ends of the outer shell 101, which is convenient for providing the sealing effect of the end. The through hole 203 is arranged in the middle of the sealing top cover 201, and is communicated with the position of the pouring cup 104, which is convenient for the position of the pouring cup 104 to carry out grouting work. The sealing fastener 204 is arranged at the four corners of the sealing top cover 201 and the sealing bottom cover 202, and the butt joint pressing strip 205 is connected at the end, which is convenient for providing the pressing limiting function of the sealing pressing strip 207, and the inside of the sealing pressing strip 207 is provided with the sealing rubber strip 208, which is conducive to providing the sealing effect of the connection of the outer shell 101, preventing the leakage of yarn and slurry in the process of grouting forming, the guide limiting column 206 is arranged on the sealing top cover 201 and the sealing bottom cover 202, and is connected with the butt joint hole 105 opened on the outer shell 101, so that the connection between the outer shell 101 is more compact, and the sealing top cover 201 and the sealing bottom cover 202 are tightly covered, so that the sealing performance is further improved, and the stable use of the mold is ensured.
[0028] The upper pressing plate 301 and the lower pressing plate 302 are distributed at the upper end and the lower end, and the corner between the two is connected with a guide support column 306 for support and to provide a guide function. An operation slot 303 is formed in the upper pressing plate 301 to facilitate grouting operation. A clamping air cylinder 304 is arranged on the upper pressing plate 301 and the lower pressing plate 302, and is connected with the sealing top cover 201 and the sealing bottom cover 202, to facilitate control of the lifting adjustment, which is conducive to height adjustment according to the operation steps and realizes the function of butt sealing. The guide rod 305 provides guidance during the lifting adjustment process to ensure stability and accuracy during the adjustment process. The guide support column 306 is provided with a guide sliding groove 307 on the inside, and a sliding block 308 is slidably connected inside, and is connected with the inside of the mounting frame 309, which helps to provide a lifting guide function. The outside of the mounting frame 309 is threadedly connected with the adjusting screw rod 310, and the bottom end of the adjusting screw rod 310 is provided with a motor 311 to drive and control the lifting adjustment, which is convenient for adjusting the height according to the operation condition, and is conducive to the installation and disassembly of the mold, and improves the operation convenience while ensuring the stability of the tight connection. The side pushing air cylinder 312 is distributed inside the mounting frame 309, and is connected with the upper pressing plate 313 and the limiting block 314 at the output end, to facilitate the control of the extension and retraction of the side pushing air cylinder 312 to make the pressing plate 313 extrude on the outside of the outer shell 101, and the limiting block 314 provides further positioning effect to improve the stability.
[0029] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions described in the foregoing embodiments, or make equivalent replacements to part of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A mold for preparing sand shells, comprising a mold mechanism (1), characterized in that: A sealing element (2) is provided on the outside of the mold mechanism (1), and a pressing mechanism (3) is provided on the outside of the sealing element (2). The mold mechanism (1) includes a plurality of outer shells (101) and inner shells (102). The outer shells (101) are located on the outside of the inner shells (102). The sealing element (2) includes a sealing top cover (201) and a sealing bottom cover (202). The sealing top cover (201) is located on the top of the outer shell (101), and the sealing bottom cover (202) is located on the bottom of the outer shell (101). Sealing fasteners (204) are fixedly installed at the four corners of the sealing top cover (201) and the sealing bottom cover (202). A sealing pressure strip (207) is provided between the two sealing fasteners (204). A sealing rubber strip (208) is fixedly installed on the inner side of the sealing pressure strip (207). The sealing top cover (201) and the sealing bottom cover (202) are used to provide a seal to the top and bottom of the mold mechanism (1). The sealing fasteners (204), the sealing pressure strip (207) and the sealing rubber strip (208) are pressed against the four corners of the side of the outer shell (101) to provide a seal.
2. The mold for preparing sand shells according to claim 1, characterized in that: The clamping mechanism (3) includes an upper pressure plate (301) and a lower pressure plate (302). Clamping cylinders (304) are symmetrically arranged on both the upper pressure plate (301) and the lower pressure plate (302). Guide support columns (306) are fixedly installed at the four corners between the upper pressure plate (301) and the lower pressure plate (302). The output end of the clamping cylinder (304) is connected to the top of the sealing top cover (201) and the bottom of the sealing bottom cover (202) respectively.
3. The mold for preparing sand shells according to claim 2, characterized in that: The guide support column (306) has a guide groove (307) on its outer side, and a sliding block (308) is slidably connected to the inner side of the guide groove (307). An installation frame (309) is connected to the outer side of the sliding block (308), and the installation frame (309) is located on the outer side of the guide support column (306).
4. The mold for preparing sand shells according to claim 3, characterized in that: One side of the mounting frame (309) is threaded with an adjusting screw (310), and a motor (311) is provided at the bottom of the adjusting screw (310). Side push cylinders (312) are provided on the sides of the mounting frame (309). A pressure plate (313) is provided at the output end of the side push cylinder (312). Several limit blocks (314) are provided on one side of the pressure plate (313). A guide plate (315) is symmetrically fixedly connected to the other side of the pressure plate (313). One end of the guide plate (315) extends through the side of the mounting frame (309).
5. The mold for preparing sand shells according to claim 4, characterized in that: An operating slot (303) is provided through the upper pressure plate (301). Several guide rods (305) are movably passed through both the upper pressure plate (301) and the lower pressure plate (302). One end of each guide rod (305) is connected to the top of the sealing top cover (201) and the bottom of the sealing bottom cover (202).
6. The mold for preparing sand shells according to claim 1, characterized in that: The sealing top cover (201) has a through hole (203) in the middle, and a butt strip (205) is fixedly connected to one end of the sealing fastener (204). The butt strip (205) is pressed against both ends of the sealing strip (207).
7. The mold for preparing sand shells according to claim 6, characterized in that: Guide posts (206) are fixedly installed at the bottom four corners of the sealing top cover (201) and the top four corners of the sealing bottom cover (202). The guide posts (206) are respectively inserted and connected to the upper and lower ends of the outer shell (101).
8. The mold for preparing sand shells according to claim 1, characterized in that: The inner top of the inner shell (102) is connected to a feed pipe (103), and a pouring cup (104) is provided on the top of the feed pipe (103). Several casting ports (109) are opened through the side of the inner shell (102), and the casting ports (109) are connected to the inside of the feed pipe (103).
9. The mold for preparing sand shells according to claim 8, characterized in that: The outer shell (101) has symmetrically provided docking holes (105) at its upper and lower ends, and the docking holes (105) are connected to the guide limiting post (206).
10. The mold for preparing sand shells according to claim 9, characterized in that: The outer shell (101) has sealing grooves (106) on both sides, and a sealing strip (107) is embedded in the inner side of the sealing groove (106). The upper and lower ends of the outer shell (101) are provided with annular sealing rings (108), and the side of the outer shell (101) has a limiting groove (110).