A split sand box for a molding machine

Abstract

The application discloses a split sand box for a molding machine, which comprises a box body, a first split sand box and a second split sand box are slidably arranged in the box body, and the first split sand box and the second split sand box are both provided with open split cavities; the open ends of the two split cavities are oppositely arranged; an opening and closing box driving mechanism is further arranged on the box body and connected with the first split sand box and the second split sand box; the opening and closing box driving mechanism is used for controlling the first split sand box and the second split sand box to approach each other to enclose a sand mold cavity or to move away from each other to open the box and demold; compared with the prior art, the first split sand box and the second split sand box are approached or separated in the radial direction to realize the formation and disassembly of the sand mold cavity, the sand mold is avoided to be wrapped as a whole, automatic closing and opening of the box and demolding are realized, and the split sand box is adapted to the full-automatic molding machine.

Description

Technical Field

[0001] This application relates to the field of casting equipment technology, specifically to a split-type intermediate sand box for a molding machine. Background Technology

[0002] For workpieces that require three layers of sand molds, such as belt pulleys (grooving wheels) in agricultural machinery parts, the current main method is manual three-layer sand box molding. When molding manually, the mold needs to be placed in the sand box and sand is filled and compacted multiple times. Each box often requires manual sand filling and compaction three times, which is inefficient, requires a large number of personnel, makes it difficult to guarantee the yield rate, and results in high labor costs.

[0003] Existing molding machine production lines typically employ a two-box structure, consisting only of an upper sand box and a lower sand box, allowing for the production of only two layers of sand molds. The existing one-piece structure of the middle sand box makes it difficult to remove the middle sand mold after molding, hindering its ability to be combined and separated from the upper and lower sand boxes. Therefore, it is difficult to achieve three-layer sand box molding on automated molding lines. Summary of the Invention

[0004] The main objective of this application is to provide a split-type medium sand box for a molding machine, which aims to solve the defects in the prior art that cannot be adapted to automatic molding machines.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A split-type medium sand box for a molding machine, comprising a box body;

[0007] The first split sand box is slidably disposed inside the box body;

[0008] The second pair of sand boxes is slidably disposed within the box body; both the first and second pair of sand boxes have open parting cavities, with the open ends of the two parting cavities facing each other; an opening and closing box driving mechanism is disposed on the box body and connected to the first and second pair of sand boxes respectively, and the opening and closing box driving mechanism is used to control the first and second pair of sand boxes to move closer to each other to enclose and form a medium sand mold cavity or to move away from each other to open the box and demold;

[0009] A compaction mechanism is used to compact the molding sand inside the cavity of the medium sand mold.

[0010] Optionally, the top and bottom of the box are both open along the height direction of the box; the medium sand box also includes a middle box lower pressure plate and a lifting frame connected to each other, the middle box lower pressure plate is located directly below the box, and the lifting frame is connected to several telescopic cylinders to control the middle box lower pressure plate to press or separate from the box.

[0011] Optionally, both the first and second paired sand boxes have open parting cavities, which extend through the top and bottom surfaces of the respective paired sand boxes along the height direction; one side of each parting cavity forms a side opening, and the side openings of the first and second paired sand boxes are arranged opposite each other so as to be close to each other to form a medium sand mold cavity or far apart from each other.

[0012] Optionally, an adjusting slide rod is provided on both sides of the box along the length direction of the box body, and a sliding seat is provided on both sides of the first split sand box and the second split sand box, and each sliding seat is slidably connected to the adjusting slide rod on the same side.

[0013] Optionally, the opening and closing box drive mechanism includes a first drive telescopic cylinder and a second drive telescopic cylinder. Both the first drive telescopic cylinder and the second drive telescopic cylinder are disposed on the box body. The first drive telescopic cylinder is connected to the first split sand box, and the second drive telescopic cylinder is connected to the second split sand box.

[0014] Optionally, the compaction mechanism includes a first compaction side plate and a second compaction side plate. The first compaction side plate is slidably disposed in the first split sand box, and the second compaction side plate is slidably disposed in the second split sand box. Along the sliding direction of the first compaction side plate, the first side plate is provided on both sides of the first split sand box, and the second side plate is provided on both sides of the second split sand box.

[0015] Optionally, the compaction mechanism further includes a first compaction telescopic cylinder and a second compaction telescopic cylinder. The first compaction telescopic cylinder is disposed on the first split sand box, and the second compaction telescopic cylinder is disposed on the second split sand box. The first compaction telescopic cylinder is driven and connected to the first compaction side plate, and the second compaction telescopic cylinder is driven and connected to the second compaction side plate.

[0016] Optionally, two of each of the first and second compaction telescopic cylinders are provided. The two first compaction telescopic cylinders are respectively connected to both ends of the first compaction side plate, and the two second compaction telescopic cylinders are respectively connected to both ends of the second compaction side plate. Adjustment sliding holes are provided on both sides of the box body, and each of the first and second compaction telescopic cylinders can be slidably inserted into each of the adjustment sliding holes.

[0017] Optionally, one end of the housing is also connected to a drive frame, the drive frame is provided with at least one drive rod, and the housing is provided with a plug hole adapted to the drive rod; the drive frame is provided with a drive rod for connecting an external drive device.

[0018] Optionally, the top surface of the enclosure is also provided with several suspension rods, and each suspension rod is provided with a suspension roller.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] This application includes a box body, in which a first pair of sand boxes and a second pair of sand boxes are slidably disposed. Both the first pair of sand boxes and the second pair of sand boxes have open-type parting cavities. The open ends of the two parting cavities are arranged opposite to each other. The box body is also provided with an opening and closing box driving mechanism, which is connected to the first pair of sand boxes and the second pair of sand boxes respectively. The opening and closing box driving mechanism is used to control the first pair of sand boxes and the second pair of sand boxes to move closer to each other to form a medium sand mold cavity or to move away from each other to open the box and demold.

[0021] In use, after the mold plate is inserted into the first and second split sand boxes, the opening and closing box drive mechanism controls the first and second split sand boxes to move closer to each other. After clamping the mold plate, the first and second split sand boxes will enclose and form a medium sand mold cavity. After the molding sand fills the medium sand mold cavity, the molding sand is compacted by the extrusion of the compaction mechanism, thereby completing the production of the medium sand mold.

[0022] Compared with the prior art, this application provides open-type parting cavities on both the first and second split sand boxes. Through these mutually facing open-type parting cavities, the medium sand mold cavity is formed by two separable split sand boxes. When the boxes are closed, the open ends of the two open-type parting cavities are connected and cooperate with the mold plate to form a stable molding cavity, which facilitates the filling and compaction of molding sand. When the boxes are opened, the two split sand boxes are far apart, and the medium sand mold is no longer tightly wrapped by the integral box wall, thereby solving the problem of difficulty in demolding after sand injection and compaction of the integral medium sand box. That is, this application realizes the formation and separation of the medium sand mold cavity by the first and second split sand boxes that are close together or separate in the radial direction, avoiding the integral wrapping of the medium sand mold.

[0023] Secondly, this application utilizes an opening and closing box drive mechanism to simultaneously achieve mold plate clamping, mold closing and molding, and mold opening and demolding. The opening and closing box drive mechanism is connected to the first and second split sand boxes respectively. First, it drives the two boxes to come together and clamp the mold plate, so that the mold plate is positioned in the cavity. Then, it maintains or continues to come together to enclose and form the medium sand mold cavity. After molding is completed, it drives the two boxes to move away in the opposite direction, so that the medium sand mold is separated from the split sand boxes, thereby realizing automatic mold closing and mold opening and demolding actions, which is suitable for automatic molding machine production lines.

[0024] Meanwhile, within the cavity formed by the mold box, the molding sand is compacted by the compaction module. The stroke of the compaction module can be set according to the actual situation. Therefore, it can not only meet the requirements of different sand mold sizes, but also meet the requirements of different compaction degrees, solving the problem that although the simple split structure can be opened, it is difficult to effectively compact the molding sand in the closed state.

[0025] Finally, this application does not simply divide the medium sand box into two parts, but solves the problems of existing integral medium sand boxes being difficult to demold and automatically compact and form by coordinating the split-type parting cavity, automatic opening and closing, cavity compaction, and demolding. This achieves automatic forming and demolding of medium sand molds in automatic molding machines. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of a split-type medium sand box for a molding machine provided in Embodiment 1 of this application;

[0027] Figure 2 An exploded view of a split-type medium sand box for a molding machine provided in Embodiment 1 of this application;

[0028] Figure 3 This is a structural diagram of the box;

[0029] Figure 4 A top view of a split-type medium sand box for a molding machine provided in Embodiment 1 of this application;

[0030] Figure 5 This is a schematic diagram of the structure of the first split sand box;

[0031] Reference numerals: 1-Box body, 2-First split sand box, 3-Second split sand box, 4-Parting cavity, 5-Compacting mechanism, 6-Lower pressure plate of middle box, 7-Lifting frame, 8-Telescopic cylinder, 9-Side opening, 10-Adjusting slide rod, 11-Slide seat, 12-First drive telescopic cylinder, 13-Second drive telescopic cylinder, 14-First side plate, 15-Second side plate, 16-Adjusting slide hole, 17-Drive frame, 18-Drive insertion rod, 19-Insertion hole, 20-Drive rod, 21-Suspension rod, 22-Suspension roller, 501-First compaction side plate, 502-Second compaction side plate, 503-First compaction telescopic cylinder, 504-Second compaction telescopic cylinder.

[0032] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "robot coordinate system and / or m" as an example, it includes the robot coordinate system solution, the m solution, or a solution where both the robot coordinate system and m are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0037] Example 1

[0038] Reference Figures 1 to 5 This embodiment is an optional embodiment of this application, which discloses a split-type medium sand box for a molding machine, including a box body 1. The box body 1 is generally arranged in a cuboid structure. A cavity is provided in the middle of the box body 1. At the same time, the top and bottom of the box body 1 are opened along the height direction of the box body 1 to ensure that the cavity is directly connected to the external environment.

[0039] Furthermore, the medium sand box also includes a medium box lower pressure plate 6 and a lifting frame 7, wherein the medium box lower pressure plate 6 is disposed at the bottom of the box body 1 and is directly opposite to the opening at the bottom of the box body 1. The medium box lower pressure plate 6 is connected to the top of the lifting frame 7, and at the same time, a number of telescopic cylinders 8 are connected to the bottom surface of the lifting frame 7, and each telescopic cylinder 8 is connected to the external structure.

[0040] The telescopic cylinder 8 is preferably a hydraulic cylinder. The telescopic cylinder can drive the lower pressure plate 6 of the middle box to rise or fall, thereby controlling the opening and closing state between the lower pressure plate 6 of the middle box and the middle sand box. In the closed state, the lower pressure plate 6 of the middle box seals the bottom of the box 1, thereby ensuring the sealing of the middle sand mold cavity. When the lower pressure plate 6 of the middle box is separated from the box 1, the opening at the bottom of the box 1 can be opened, thereby facilitating the separation of the middle sand mold from the box 1.

[0041] A mold plate 601 is also provided on the top surface of the lower pressure plate 6 of the middle box. When the lower pressure plate 6 of the middle box rises, the mold plate 601 will be inserted into the middle sand box at the same time. During the preparation of the middle sand mold, the external structure such as the sealing plate at the top of the middle sand box will be in contact with the top surface of the mold plate. Therefore, the height (or thickness) of the middle sand mold depends on the height of the mold plate 601. Therefore, different styling requirements can be met by replacing different mold plates 601.

[0042] The housing 1 is also provided with a first split sand box 2 and a second split sand box 3. The horizontal cross-section of the first split sand box 2 is U-shaped, thereby forming an open-end parting cavity 4 on the first split sand box 2. The open-end parting cavity 4 also forms a side opening 9 on one side of the first split sand box 2. It should be noted that the side opening 9 can be provided on any side of the first split sand box 2.

[0043] Along the height direction of the first split sand box 2, the parting cavity 4 penetrates the top and bottom surfaces of the first split sand box 2; the second split sand box 3 has the same external structure as the first split sand box 2.

[0044] Along the length of the box body 1, the first split sand box 2 and the second split sand box 3 are sequentially arranged in the cavity in the middle of the box body 1, and the side openings 9 of the first split sand box 2 and the side openings 9 of the second split sand box 3 are directly opposite each other, so as to ensure that the side openings 9 of the first split sand box 2 and the second split sand box 3 can be spliced ​​together to form a medium sand cavity.

[0045] It should be noted that the parting cavity 4 on the first split sand box 2 and the parting cavity 4 on the second split sand box 3 can be completely the same or different. That is, when they are completely the same, the first split sand box 2 and the second split sand box 3 are completely the same, and their parting cavities 4 are also completely the same size, each occupying half of the medium sand mold cavity; when they are different, it means that the two parting cavities 4 are different in size. For example, the parting cavity 4 on the first split sand box 2 is set to two-thirds of the size of the medium sand mold cavity, and the remainder is the parting cavity 4 of the second split sand box 3. Through the above settings, different sand mold making requirements can be met, and the applicability of the equipment can be expanded.

[0046] Furthermore, along the length direction of the box body 1, adjusting slide rods 10 are provided on the inner walls of both sides of the box body 1. Preferably, at least two parallel adjusting slide rods 10 are provided on the same side wall. At the same time, several slide seats 11 are provided on both sides of the first split sand box 2 and the second split sand box 3. Each slide seat 11 is slidably connected to each adjusting slide rod 10 on the same side. To further improve the smoothness of sliding, linear rolling bearings can also be provided on the slide seats 11.

[0047] Furthermore, an opening and closing box driving mechanism is also provided on the box body 1. The opening and closing box driving mechanism includes a first driving telescopic cylinder 12 and a second driving telescopic cylinder 13. Both the first driving telescopic cylinder 12 and the second driving telescopic cylinder 13 are hydraulic cylinders, and the structures of the first driving telescopic cylinder 12 and the second driving telescopic cylinder 13 are exactly the same.

[0048] Along the length of the housing 1, mounting holes are provided at both ends of the housing 1. The first drive telescopic cylinder 12 and the second drive telescopic cylinder 13 are respectively placed at both ends of the housing 1 and are adapted to the mounting holes on the same side. That is, the first drive telescopic cylinder 12 is installed on the outer wall of the housing 1, and its telescopic rod extends into the cavity of the housing 1 through the mounting hole, and is simultaneously poweredly connected to the outer side of the first split sand box 2. The second drive telescopic cylinder 13 is installed in the same way, so that the position control of the first split sand box 2 is realized by the first drive telescopic cylinder 12, and the position control of the second split sand box 3 is realized by the second drive telescopic cylinder 13, that is, the first split sand box 2 and the second split sand box 3 are controlled to move closer to each other to form a medium sand mold cavity or move further away from each other.

[0049] Furthermore, the medium sand box also includes a compaction mechanism 5, which includes a first compaction side plate 501 and a second compaction side plate 502. The first compaction side plate 501 is slidably disposed in the first split sand box 2, and the second compaction side plate 502 is slidably disposed in the second split sand box 3. Along the sliding direction of the first compaction side plate 501, a first side plate 14 is provided on both sides of the first split sand box 2, and a second side plate 15 is provided on both sides of the second split sand box 3.

[0050] The first split sand box 2 has three inner walls, two of which face each other, and the other inner wall faces the side opening 9. A first side plate 14 is provided on the two facing inner walls. The first compacted side plate 501 is positioned opposite the other side wall, that is, the first compacted side plate 501 is positioned opposite the side opening 9.

[0051] The second compacted side plate 502 and the two second side plates 15 are installed in the second split sand box 3 in the same way. After installation, the first compacted side plate 501 and the second compacted side plate 502 are directly opposite each other along the length of the box body 1.

[0052] Furthermore, the compaction mechanism 5 also includes a first compaction telescopic cylinder 503 and a second compaction telescopic cylinder 504. The first compaction telescopic cylinder 503 and the second compaction telescopic cylinder 504 are hydraulic cylinders of the same type. Preferably, there are two of each of the first compaction telescopic cylinder 503 and the second compaction telescopic cylinder 504.

[0053] Along the length of the box body 1, two adjusting sliding holes 16 are provided at both ends of the box body 1. The two adjusting sliding holes 16 are symmetrically arranged about the mounting holes. The two first compaction telescopic cylinders 503 are provided on the first split sand box 2, and their telescopic rods pass through the first split sand box 2 and are respectively connected to both ends of the first compaction side plate 501. The two second compaction telescopic cylinders 504 are provided on the second split sand box 3, and their telescopic rods pass through the second split sand box 3 and are respectively connected to both ends of the second compaction side plate 502.

[0054] The first compaction telescopic cylinder 503 and the second compaction telescopic cylinder 504 can realize the position control of the first compaction side plate 501 and the second compaction side plate 502. The structure is simple and easy to operate. With the help of the distance sensor, the position can be precisely controlled.

[0055] Meanwhile, by adjusting the setting of the sliding hole 16, sufficient space can be reserved on the housing 1 for the movement of the first compaction telescopic cylinder 503 and the second compaction telescopic cylinder 504, so as to avoid interference between the housing 1 and the first compaction telescopic cylinder 503 and the second compaction telescopic cylinder 504, and ensure the safe operation of the equipment.

[0056] Secondly, during the movement of the first compacted side plate 501 and the second compacted side plate 502 approaching each other, the size of the medium sand mold cavity will be gradually reduced, thereby compacting the molding sand and ensuring the molding quality.

[0057] Especially for components with grooves, the axial direction of the molding sand entering the groove is blocked, while the first compaction side plate 501 and the second compaction side plate 502, which slide in the radial direction, can press the molding sand into the groove in the radial direction, avoiding the molding defects caused by the lack of molding sand in the groove, ensuring the molding quality of the medium sand mold, and the extrusion force applied by the first compaction side plate 501 and the second compaction side plate 502 in the radial direction can cooperate with the thrust of the inner wall of the groove to compact the molding sand in the groove, ensuring the molding quality of the groove.

[0058] The length of the medium sand mold can also be adjusted by controlling the distance between the first compacted side plate 501 and the second compacted side plate 502, thereby preparing medium sand molds of different sizes to meet different shaping requirements.

[0059] Furthermore, a number of suspension rods 21 are provided on the top surface of the box body 1. Along the length direction of the box body 1, each suspension rod 21 is provided on both sides of the box body 1, and a suspension roller 22 is provided at the top of each suspension rod 21; at the same time, a number of traveling wheels are provided at the bottom of the box body 1.

[0060] Furthermore, the medium sand box also includes a drive frame 17, the bottom of which is provided with several wheels. Along the length of the box body 1, one end of the box body 1 is provided with several insertion holes 19, and one end of the drive frame 17 is provided with several drive rods 18. Each drive rod 18 is connected to each insertion hole 19, thereby powering the box body 1 and the drive frame 17. The drive frame 17 is also provided with a drive rod 20, the free end of which is used to connect to an external drive device.

[0061] When the medium sand box described in this application is in use, the lifting frame is first moved to one side of the box body by controlling the telescopic cylinder, so as to insert the mold plate located on the lower pressure plate of the medium box into the box body, and at the same time the bottom of the box body is closed by the lower pressure plate of the medium box.

[0062] Subsequently, the opening and closing box drive mechanism controls the first and second paired sand boxes to move closer together and clamp the mold plate. At this time, the first and second paired sand boxes will surround and form a medium sand mold cavity. Then, the top opening of the medium sand box is closed by external components such as the sand shooting barrel and the upper pressure plate in the middle box. Then, molding sand is filled into the medium sand mold cavity. After the molding sand fills the medium sand mold cavity, the first and second compaction telescopic cylinders control the first and second compaction side plates to move closer together until the set movement endpoint. At this time, the molding sand is compacted, and the production of the medium sand mold is completed. Finally, the drive frame controls the medium sand box and the medium sand mold to move to the box closing position.

[0063] Compared with the prior art, the first and second split sand boxes of this application are both provided with open-type parting cavities. Through the above-mentioned open-type parting cavities facing each other, the medium sand mold cavity is formed by two separable split sand boxes. When the boxes are closed, the open ends of the two open-type parting cavities are connected and cooperate with the mold plate to form a stable molding cavity, which facilitates the filling and compaction of molding sand. When the boxes are opened, the two split sand boxes are far apart from each other, and the medium sand mold is no longer tightly wrapped by the integral box wall, thereby solving the problem of difficulty in demolding after sand injection and compaction of the integral medium sand box. That is, this application realizes the formation and separation of the medium sand mold cavity by the first and second split sand boxes that are close together or separate in the radial direction, avoiding the integral wrapping of the medium sand mold.

[0064] Secondly, this application utilizes an opening and closing box drive mechanism to simultaneously achieve mold plate clamping, mold closing and molding, and mold opening and demolding. The opening and closing box drive mechanism is connected to the first and second split sand boxes respectively. First, it drives the two boxes to come together and clamp the mold plate, so that the mold plate is positioned in the cavity. Then, it maintains or continues to come together to enclose and form the medium sand mold cavity. After molding is completed, it drives the two boxes to move away in the opposite direction, so that the medium sand mold is separated from the split sand boxes, thereby realizing automatic mold closing and mold opening and demolding actions, which is suitable for automatic molding machine production lines.

[0065] Meanwhile, within the cavity formed by the mold box, the molding sand is compacted by the compaction module. The compaction module can be set according to the actual situation, so it can not only meet different sand mold size requirements, but also different compaction requirements, solving the problem that although the simple split structure can be opened, it is difficult to effectively compact the molding sand in the closed state.

[0066] Finally, this application does not simply divide the medium sand box into two parts, but solves the problems of existing integral medium sand boxes being difficult to demold and automatically compact and form by coordinating the split-type parting cavity, automatic opening and closing, cavity compaction, and demolding. This achieves automatic forming and demolding of medium sand molds in automatic molding machines.

[0067] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A split-type medium sand box for a molding machine, characterized in that, Includes the housing (1); The first split sand box (2) is slidably disposed inside the box body (1); The second split sand box (3) is slidably disposed inside the box body (1); both the first split sand box (2) and the second split sand box (3) have open-type parting cavities (4), and the open ends of the two parting cavities (4) are arranged opposite to each other; The opening and closing box driving mechanism is disposed on the box body (1) and connected to the first split sand box (2) and the second split sand box (3) respectively. The opening and closing box driving mechanism is used to control the first split sand box (2) and the second split sand box (3) to move closer to each other to form a medium sand mold cavity or to move further apart to open the box and demold. The compaction mechanism (5) is used to compact the molding sand in the cavity of the medium sand mold.

2. A split-type medium sand box for a molding machine according to claim 1, characterized in that, Along the height direction of the box body (1), the top and bottom of the box body (1) are both open; the medium sand box also includes a middle box lower pressure plate (6) and a lifting frame (7) connected to each other. The middle box lower pressure plate (6) is located directly below the box body (1), and the lifting frame (7) is connected to several telescopic cylinders (8) to control the middle box lower pressure plate (6) to press or separate from the box body (1).

3. A split-type medium sand box for a molding machine according to claim 1, characterized in that, Both the first split sand box (2) and the second split sand box (3) have open-type parting cavities (4), which penetrate the top and bottom surfaces of the corresponding split boxes along the height direction; each of the parting cavities (4) has a side opening (9) on one side, and the side openings (9) of the first split sand box (2) and the second split sand box (3) are arranged opposite to each other to form a medium sand mold cavity or to be far apart from each other.

4. A split-type medium sand box for a molding machine according to claim 1 or 3, characterized in that, Along the length of the box body (1), an adjusting slide rod (10) is provided on both sides of the box body (1). The first split sand box (2) and the second split sand box (3) are provided with slide seats (11) on both sides. Each slide seat (11) is slidably connected to the adjusting slide rod (10) on the same side.

5. A split-type medium sand box for a molding machine according to claim 4, characterized in that, The opening and closing box driving mechanism includes a first driving telescopic cylinder (12) and a second driving telescopic cylinder (13). The first driving telescopic cylinder (12) and the second driving telescopic cylinder (13) are both disposed on the box body (1). The first driving telescopic cylinder (12) is connected to the first split sand box (2), and the second driving telescopic cylinder (13) is connected to the second split sand box (3).

6. A split-type medium sand box for a molding machine according to claim 5, characterized in that, The compaction mechanism (5) includes a first compaction side plate (501) and a second compaction side plate (502). The first compaction side plate (501) is slidably disposed in the first split sand box (2), and the second compaction side plate (502) is slidably disposed in the second split sand box (3). Along the sliding direction of the first compaction side plate (501), the first split sand box (2) is provided with a first side plate (14) on both sides, and the second split sand box (3) is provided with a second side plate (15) on both sides.

7. A split-type medium sand box for a molding machine according to claim 6, characterized in that, The compaction mechanism (5) further includes a first compaction telescopic cylinder (503) and a second compaction telescopic cylinder (504). The first compaction telescopic cylinder (503) is disposed on the first split sand box (2), and the second compaction telescopic cylinder (504) is disposed on the second split sand box (3). The first compaction telescopic cylinder (503) is driven connected to the first compaction side plate (501), and the second compaction telescopic cylinder (504) is driven connected to the second compaction side plate (502).

8. A split-type medium sand box for a molding machine according to claim 7, characterized in that, Two of each of the first compaction telescopic cylinder (503) and the second compaction telescopic cylinder (504) are provided. The two first compaction telescopic cylinders (503) are respectively connected to both ends of the first compaction side plate (501), and the two second compaction telescopic cylinders (504) are respectively connected to both ends of the second compaction side plate (502). Adjustment sliding holes (16) are provided on both sides of the box body (1), and each of the first compaction telescopic cylinders (503) and the second compaction telescopic cylinders (504) can be slidably inserted into each of the adjustment sliding holes (16).

9. A split-type medium sand box for a molding machine according to claim 1, characterized in that, One end of the housing (1) is also connected to a drive frame (17), the drive frame (17) is provided with at least one drive rod (18), the housing (1) is provided with a plug hole (19) adapted to the drive rod (18), and the drive frame (17) is provided with a drive rod (20) for connecting an external drive device.

10. A split-type medium sand box for a molding machine according to claim 1, characterized in that, The top surface of the box (1) is also provided with several suspension rods (21), and each suspension rod (21) is provided with a suspension roller (22).

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