A core shooter and a core shooting method

Abstract

The application relates to the technical field of core shooting machines, and provides a core shooting machine and a core shooting method.The core shooting machine comprises a frame body, an upper mold fixing base arranged on the frame body, the upper mold fixing base being capable of fixing an upper mold; a lifting lower mold base arranged on the frame body in a lifting mode, the lifting lower mold base being located at the bottom of the upper mold fixing base, and the lifting lower mold base being capable of ascending to drive a lower mold to approach the upper mold and combine with the upper mold; an upper sand shooting mechanism arranged on the frame body in a moving mode, the upper sand shooting mechanism being capable of moving to approach the top of the upper mold fixing base and abutting against the top of the upper mold; and at least one side sand shooting mechanism arranged on the frame body in a moving mode, the side sand shooting mechanism being capable of moving to approach the side edge of the upper mold, and the side sand shooting mechanism and the upper sand shooting mechanism being capable of acting independently.The upper mold and the fixed upper mold provided by the application are capable of ascending, the upper sand shooting mechanism and the side sand shooting mechanism are arranged on the frame body in a moving mode, the vertical sand shooting machine and the horizontal sand shooting machine are combined, and the technical problem that the vertical sand shooting machine and the horizontal sand shooting machine cannot be simply combined in the prior art is solved.

Description

Technical Field

[0001] This invention relates to the field of core shooting machine technology, and more specifically, to a core shooting machine and a core shooting method. Background Technology

[0002] Core shooters are key pieces of equipment in the foundry industry used for making sand cores. The core mechanism uses compressed air to inject molding sand into a core box, where it is heated to form the desired sand core. Based on the direction of sand injection, core shooters are divided into vertical core shooters and horizontal core shooters. Vertical core shooters typically use a vertical parting line, meaning the mold opens and closes vertically. The core box usually opens horizontally or front-to-back during parting. This parting line allows the equipment to accommodate taller core boxes with fewer restrictions on core box height. Horizontal core shooters use a horizontal parting line, requiring the core box to move up and down during opening and closing to facilitate core removal and core box cleaning.

[0003] In existing technologies, both vertical and horizontal core shooting machines typically have their limitations in practical use. For example, horizontal core shooting machines are not suitable for processing mold cores with considerable height. Vertical core shooting machines are suitable for processing shell mold cores with large flat surfaces, but because they require more holes to be drilled in the mold during use and more ejector pins for demolding, the overall cost is higher, making them unsuitable for workpieces with simple structures and small dimensions. However, to meet different production needs, companies often have to purchase both horizontal and vertical core shooting machines simultaneously, resulting in significant space requirements and high equipment costs. Furthermore, since vertical core shooting machines open from side to side or front to back, while horizontal core shooting machines open from top to bottom, the limitations of each type of core shooting machine cannot be easily solved by combining them. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a core shooting machine and a core shooting method, which solves the technical problem that both horizontal and vertical core shooting machines in the prior art have their own limitations and cannot be easily combined.

[0005] According to one aspect, at least one embodiment of the present invention provides a core shooter, comprising:

[0006] Frame;

[0007] An upper mold fixing seat is provided on the frame and is used to fix the upper mold;

[0008] The lower mold base is lifted and installed on the frame and located below the upper mold fixing base. The lower mold base can drive the lower mold to rise and approach the upper mold until it closes with the upper mold.

[0009] An upper sand shooting mechanism is movably arranged on the frame body, and is capable of being lowered to contact the top of the upper mold so that the sand in the upper sand shooting mechanism can enter between the upper mold and the lower mold under the action of gas;

[0010] At least one side sand shooting mechanism is movably arranged on the frame body, and is capable of being translated to contact the side of the upper mold so that the sand in the side sand shooting mechanism can enter between the upper mold and the lower mold under the action of gas, and the side sand shooting mechanism acts independently of the upper sand shooting mechanism.

[0011] For example, the core shooter provided by at least one embodiment of the present application further comprises:

[0012] A sliding frame is horizontally slidably arranged on the frame body and above the upper mold fixing seat, and the upper sand shooting mechanism is arranged on the sliding frame.

[0013] An upper core ejecting mechanism is arranged on the sliding frame, and the sliding frame can drive the upper sand shooting mechanism and the upper core ejecting mechanism to be horizontally moved to above the upper mold fixing seat in sequence, and the upper core ejecting mechanism can eject the core between the upper mold and the lower mold away from the upper mold after the sand shooting of the upper sand shooting mechanism is completed.

[0014] For example, the core shooter provided by at least one embodiment of the present application, the upper sand shooting mechanism and the upper core ejecting mechanism are both arranged on the sliding frame in a lifting manner, and the upper sand shooting mechanism and the upper core ejecting mechanism can both be lowered to be close to the upper mold fixing seat, and the core shooter further comprises:

[0015] A linear driving mechanism is arranged on the top of the frame body, and is used to drive the upper sand shooting mechanism or the upper core ejecting mechanism to be lowered and close to the upper mold fixing seat.

[0016] A plurality of supporting elastic members are arranged on the sliding frame, and are used to act on the upper sand shooting mechanism or the upper core ejecting mechanism, and are used to provide a force for lifting the upper sand shooting mechanism or the upper core ejecting mechanism away from the upper mold fixing seat.

[0017] For example, the core shooter provided by at least one embodiment of the present application, the upper sand shooting mechanism comprises:

[0018] A sand shooting cylinder is arranged on the sliding frame in a lifting manner, has a sand feeding opening, and is capable of being lowered and close to the upper mold fixing seat under the pushing action of the linear driving mechanism when the sand shooting cylinder is below the linear driving mechanism.

[0019] A sand shooting box is arranged at the bottom of the sand shooting cylinder, has a containing space connected with the inside of the sand shooting cylinder, and is used to contain sand.

[0020] A sand shooting head is arranged at the bottom of the sand shooting box, and the sand shooting head has a plurality of sand shooting openings through which the sand in the holding space can enter between the upper mold and the lower mold under the action of air pressure.

[0021] For example, the sand core machine provided by at least one embodiment of the present application is provided with a sand shooting head which is detachably connected to the sand shooting box through a connecting piece, and the connecting piece comprises:

[0022] A plurality of connecting blocks are arranged on the outer edge of the sand shooting head, and the connecting blocks have horizontally-through connecting holes;

[0023] A plurality of locking cylinders are arranged on the outer wall of the sand shooting box, and the locking cylinders correspond to the connecting blocks one by one, and the driving end of the locking cylinder can horizontally extend into the connecting hole to fix the sand shooting head at the bottom of the sand shooting box.

[0024] For example, the sand core machine provided by at least one embodiment of the present application is provided with an upper core ejection mechanism comprising:

[0025] A core ejection plate is arranged on the sliding frame in a lifting manner, and the core ejection plate can be lowered to approach the upper mold fixing seat under the action of the linear driving mechanism;

[0026] A push seat is detachably arranged on the sliding frame, and the push seat has a plurality of push rods therein, and the push rods can be extended out of the push seat and into the upper mold and the lower mold under the driving of the core ejection plate to push the sand core to fall onto the lower mold, and the sand core can be lowered away from the upper mold fixing seat along with the lower mold.

[0027] For example, the sand core machine provided by at least one embodiment of the present application is provided with an upper core ejection mechanism located above the upper mold fixing seat, and the upper sand shooting mechanism is located at a sand adding position, and the sand core machine further comprises:

[0028] A sand storage box is arranged on the frame body, and the sand adding opening of the sand shooting cylinder is in communication with the bottom of the sand storage box when the upper sand shooting mechanism is located at the sand adding position.

[0029] For example, the sand core machine provided by at least one embodiment of the present application further comprises:

[0030] A sand scraping plate is arranged on the sliding frame, and the sand scraping plate is located between the upper sand shooting mechanism and the upper core ejection mechanism, and the sand scraping plate can slide against the top of the upper mold under the translation of the sliding frame to scrape off the residual sand on the top of the upper mold.

[0031] For example, the core shooter provided by at least one embodiment of the present application comprises a side sand injection mechanism located at the side of the upper mold fixing seat, wherein the side sand injection mechanism comprises:

[0032] A lifting platform is arranged on the frame body and can be lifted to approach the upper mold fixing seat;

[0033] A sliding platform is arranged on the lifting platform and can be slid to approach the upper mold fixing seat;

[0034] A sand injection assembly is arranged on the sliding platform, and the sand injection assembly has a sand inlet, a gas connection port and a sand injection port, wherein the sand injection port can enter between the upper mold and the lower mold after the molds are closed, so that the sand can enter between the upper mold and the lower mold under the action of gas pressure.

[0035] A core shooting method is provided, which utilizes a core shooter to shoot a core, and comprises an upper core shooting method utilizing the upper sand injection mechanism to inject sand and a side core shooting method utilizing the side sand injection mechanism to inject sand,

[0036] The upper core shooting method comprises the following steps:

[0037] S110, fixing the upper mold with a sand inlet at the top on the upper mold fixing seat and fixing the lower mold on the lifting lower mold seat;

[0038] S120, lifting the lower mold seat to drive the lower mold to ascend and close with the upper mold;

[0039] S130, moving the upper sand injection mechanism to contact the top of the upper mold, and injecting the sand between the upper mold and the lower mold through the sand inlet of the upper sand injection mechanism to form a sand core;

[0040] S140, demolding after the sand core is hardened, so that the sand core falls on the lower mold and can descend away from the upper mold following the lower mold;

[0041] The side core shooting method comprises the following steps:

[0042] S210, fixing the upper mold with a sand inlet at the side on the upper mold fixing seat and fixing the lower mold on the lifting lower mold seat;

[0043] S220, lifting the lower mold seat to drive the lower mold to ascend and close with the upper mold;

[0044] S230, moving the side sand injection mechanism to contact the side of the upper mold, and injecting the sand between the upper mold and the lower mold through the sand inlet of the side sand injection mechanism to form a sand core;

[0045] S240, demolding after the sand core is hardened, so that the sand core falls on the lower mold and can descend away from the upper mold following the lower mold.

[0046] The present application has the following beneficial effects:

[0047] In the present application, by setting the upper sand shooting mechanism and the side sand shooting mechanism, the sand can be shot from the top or the side according to the shape, size and structural characteristics of the mold core, which solves the problem that the horizontal core shooter is not suitable for processing high mold cores, and the vertical core shooter is not suitable for processing simple structure and small size workpieces, and improves the processing adaptability of the equipment to different types of mold cores. Enterprises do not need to purchase horizontal core shooter and vertical core shooter at the same time, and one equipment can meet the needs of various core shooting, which reduces the number of equipment purchase, reduces the cost of equipment purchase, and also saves the space occupied by the equipment.

[0048] The upper mold is fixed by the upper mold fixing seat, the lower mold is lifted and combined with the upper mold, the top and the side of the upper mold are in an exposed state, and the operation only needs to select the mold with the sand inlet on the top or the side according to the needs. Through this way, the problem that the vertical core shooter and the horizontal core shooter cannot be simply combined because of different mold opening and closing directions is overcome. Secondly, the upper sand shooting mechanism and the side sand shooting mechanism can realize mutual avoidance. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some example embodiments of the present application. For those skilled in the art, other drawings can be obtained according to the contents of the example embodiments of the present application and the drawings without paying creative labor.

[0050] Figure 1 It is an overall structure schematic diagram of an embodiment of the present application;

[0051] Figure 2 It is an overall structure schematic diagram of an embodiment of the present application; Figure 1 It is an enlarged structure schematic diagram of position A in the embodiment;

[0052] Figure 3 It is a rear view structure schematic diagram of an embodiment of the present application; Figure 1

[0053] Figure 4 It is an enlarged structure schematic diagram of position C in the embodiment; Figure 3

[0054] Figure 5 It is an overall structure schematic diagram of another angle in an embodiment of the present application; Figure 1

[0055] Figure 6 It is an enlarged structure schematic diagram of position B in the embodiment; Figure 5

[0056] ​​​​In the figure: 100, frame body, 200, upper mold fixing seat, 300, lifting lower mold seat, 400, upper sand shooting mechanism, 500, side sand shooting mechanism, 600, sliding frame, 700, upper core shooting mechanism, 810, linear driving mechanism, 820, supporting elastic piece, 410, sand shooting cylinder, 420, sand shooting box, 430, sand shooting head, 440, connecting piece, 441, connecting block, 442, locking cylinder, 710, core shooting plate, 720, ejecting seat, 730, ejecting rod, 900, sand storage box, 910, sliding plug valve, 920, reset elastic piece, 610, sand scraping plate, 510, lifting platform, 520, sliding platform, 530, sand shooting assembly, 531, gas connecting port, 532, sand shooting port. DETAILED DESCRIPTION

[0057] The application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the application, and not to limit the application.

[0058] In order to make the drawing simple, only the parts related to the application are shown in each figure, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, only one of the parts with the same structure or function is shown in some figures, or only one of them is marked. In this text, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0059] In this text, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0060] In the application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the indirect contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0061] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0062] In addition, in the description of the present application, the terms "first", "second", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0063] As shown in Figures 1-3 The present application relates to a core shooting machine, and particularly relates to a core shooting machine with a lifting lower mold seat.

[0064] The upper mold fixing seat 200 is made of metal material and has sufficient strength and rigidity to fix the upper mold. It is firmly installed on the frame 100 by bolts or welding, and the surface of the upper mold fixing seat 200 is designed with fixing structures such as screw holes, clamping grooves, etc. that are matched with the upper mold. For example, the upper mold can be fixed on the upper mold fixing seat 200 by using bolts through the screw holes provided on the surface of the upper mold fixing seat 200.

[0065] The lifting lower mold seat 300 is composed of a lifting frame, a lifting driving device, and a lower mold fixing seat. Optionally, the lifting lower mold seat 300 is lifted and lowered in cooperation with the frame 100 through guide rails and sliding blocks. The guide rails are installed on the frame 100, and the sliding blocks are installed on the side surface of the lifting frame to ensure that the lifting lower mold seat 300 is lifted and lowered smoothly.

[0066] The lifting driving device can be a hydraulic cylinder, an air cylinder, or an electric screw rod lifter, etc. Taking the hydraulic cylinder as an example, the cylinder body of the hydraulic cylinder is fixed at the bottom of the frame 100, the piston rod is connected with the lifting frame, and the extension and retraction of the piston rod are controlled by the pressure of the hydraulic oil, thereby driving the lifting lower mold seat 300 to rise or fall. The lower mold fixing seat is arranged at the top of the lifting frame and is also made of metal material. The surface of the lower mold fixing seat has fixing structures such as screw holes, positioning pins, etc. that are matched with the lower mold, which are used to fix the lower mold. When the lower mold is placed on the lower mold fixing seat, the lower mold is fixed by using bolts through the screw holes or is positioned by using positioning pins and then is fixed by other fastening methods, so as to ensure that the lower mold is relatively fixed with the lifting lower mold seat 300 during the lifting process. The lower mold rises to be close to the upper mold and then the upper mold and the lower mold are combined.

[0067] According to the different selected top sand injection mechanism 400 and side sand injection mechanism 500, the corresponding top mold or bottom mold should be selected. For example, when the top sand injection mechanism 400 is used for sand injection, the top of the top mold should have several sand injection ports so that the sand injected by the top sand injection mechanism 400 can enter the top mold and the bottom mold from the top. When the side sand injection mechanism 500 is used for sand injection, the sand injection ports should be located on the side of the top mold or the bottom mold so that the sand injected by the side sand injection mechanism 500 can enter the top mold and the bottom mold from the side.

[0068] The top sand injection mechanism 400 is movably installed on the frame 100 and is driven by an independent driving device. The top sand injection mechanism 400 has a sand adding port 411 for adding sand, an air inlet for introducing compressed air, and a sand injection port 532 for injecting sand. After the sand is added through the sand adding port 411, the compressed air introduced through the air inlet can inject the sand in the sand injection mechanism from the sand injection port 532. Optionally, the top sand injection mechanism 400 can move up and down on the frame 100. The top sand injection mechanism 400 is located above the top mold fixing seat 200, and the top sand injection mechanism 400 can be lowered to be close to the top mold fixing seat 200 and abut the top surface of the top mold fixed on the top mold fixing seat 200. The sand injection ports on the top sand injection mechanism 400 correspond to the sand injection ports on the top of the top mold fixing seat 200 one by one, so that the top sand injection mechanism 400 can inject sand between the top mold and the bottom mold. The part of the top sand injection mechanism 400 abutting the top mold is provided with a sealing device, which can be a rubber sealing ring, so as to prevent the sand from escaping during sand injection.

[0069] The number of side sand injection mechanisms 500 is at least one, and several side sand injection mechanisms 500 are movably installed on the frame 100, and each side sand injection mechanism 500 can be driven by an independent driving device. The side sand injection mechanism 500 also has a sand adding port 411 for adding sand, an air inlet for introducing compressed air, and a sand injection port 532 for injecting sand. After the sand is added through the sand adding port 411, the compressed air introduced through the air inlet can inject the sand in the sand injection mechanism from the sand injection port 532. Several side sand injection mechanisms 500 can move close to different sides of the top mold. Optionally, the side sand injection mechanism 500 can move horizontally on the frame 100, and the side sand injection mechanism 500 can abut the side of the top mold and the bottom mold and correspond to the sand injection ports one by one, so that the side sand injection mechanism 500 can inject sand from the side between the top mold and the bottom mold. Similarly, the part of the side sand injection mechanism 500 abutting the top mold and the bottom mold is provided with a sealing device, which can be a rubber sealing ring, so as to prevent the sand from escaping during sand injection.

[0070] The side sand injection mechanism 500 and the top sand injection mechanism 400 act independently, and in operation, the top sand injection mechanism 400 or the side sand injection mechanism 500 is selected for sand injection operation according to the structure of the mold and the need for sand filling.

[0071] Working principle: First, the upper mold is fixed on the upper mold fixing seat 200, and the lower mold is fixed on the lower mold fixing seat of the lifting lower mold seat 300. The lifting lower mold seat 300 is lifted under the action of the lifting driving device, driving the lower mold to approach the upper mold and combine with the upper mold. When the upper sand shooting mechanism 400 works, the moving driving device moves the upper sand shooting mechanism 400 to the top of the upper mold, and then the sand in the sand shooting cylinder 410 is shot into the cavity between the upper mold and the lower mold through compressed air. When the side sand shooting mechanism 500 works, the moving driving device moves the side sand shooting mechanism 500 to the side of the upper mold, and the sand is also shot into the cavity through the sand shooting nozzle by compressed air. According to the structural characteristics of the mold and the requirements of sand filling, the upper sand shooting mechanism 400 or the side sand shooting mechanism 500 can be selected for sand shooting, so as to realize the production of different types of mold cores and avoid the limitations of traditional horizontal core shooter and vertical core shooter.

[0072] By setting the upper sand shooting mechanism 400 and the side sand shooting mechanism 500, the top or side sand shooting can be flexibly selected according to the shape, size and structural characteristics of the mold core, solving the problem that the horizontal core shooter is not suitable for processing high mold cores, and the vertical core shooter is not suitable for processing simple structure and small size workpieces, improving the processing adaptability of the equipment to different types of mold cores. Enterprises do not need to purchase horizontal core shooter and vertical core shooter at the same time, and one equipment can meet the needs of various core shooting, reducing the number of equipment purchase, reducing the cost of equipment purchase, and also saving the space occupied by the equipment.

[0073] The upper mold is fixed by the upper mold fixing seat 200, and the lower mold is lifted and combined with the upper mold, so that the top and side of the upper mold are in an exposed state, and the operation only needs to select the mold with sand inlet on the top or sand inlet on the side according to the needs. Through this way, the problem that the vertical core shooter and the horizontal core shooter cannot be simply combined because of different mold opening and closing directions is overcome. Secondly, the upper sand shooting mechanism 400 and the side sand shooting mechanism 500 can realize mutual avoidance. For example, the side sand shooting mechanism 500 can avoid the installation position of the mold by moving away from the upper mold fixing seat 200. The upper sand shooting mechanism 400 is located above the upper mold fixing seat 200 and does not affect the horizontal movement of the side sand shooting mechanism 500 located on both sides of the upper mold fixing seat 200.

[0074] Reference Figure 1 and Figure 3In some embodiments, the core shooter further comprises a sliding frame 600 and an upper core lifter 700. The sliding frame 600 is composed of metal profiles to ensure its structural strength can bear the upper sand shooting mechanism 400 and the upper core lifter 700. Its shape is a frame structure, and can limit the movement of the upper sand shooting mechanism 400 and the upper core lifter 700 in the sliding direction of the sliding frame 600, so that the upper sand shooting mechanism 400 and the upper core lifter 700 can slide horizontally with the sliding frame 600. The sliding frame 600 is connected to the frame body 100 through a sliding rail and a sliding block. The sliding rail is mounted on the frame body 100, and the sliding block is fixed to the bottom of the sliding frame 600 to ensure that the sliding frame 600 can slide smoothly in the designated direction. For example, the sliding rail is fixed to the frame body 100 by welding or bolt connection, and the sliding block is suspended on the guide rail. Alternatively, the sliding block can also use sliding wheels to change the sliding friction to rolling friction, which can improve the service life of the sliding wheels and reduce the friction force required for movement. The sliding wheels are provided with a limiting ring matched with the sliding rail, so that the limiting ring can limit the axial movement of the sliding wheels under the action of the sliding rail. The driving mode adopts a pneumatic cylinder or a hydraulic cylinder. Specifically, one end of the pneumatic cylinder or the hydraulic cylinder is fixed to the frame body 100, and the other end is fixed to the sliding frame 600. The movement of the sliding frame 600 is controlled by the extension and retraction of the pneumatic cylinder or the hydraulic cylinder.

[0075] The sliding frame 600 is provided with mounting positions for fixing the upper sand shooting mechanism 400 and the upper core lifter 700, so that the upper sand shooting mechanism 400 and the upper core lifter 700 can slide with the sliding frame 600. Along the sliding direction of the sliding frame 600, the upper core lifter 700 is located in front of or behind the upper sand shooting mechanism 400, so that the sliding frame 600 can alternately move the upper sand shooting mechanism 400 and the upper core lifter 700 above the upper mold fixing base 200 by sliding.

[0076] Working principle: when the core shooter is working, the sliding frame 600 first drives the upper sand shooting mechanism 400 to move above the upper mold fixing base 200, and the upper sand shooting mechanism 400 shoots sand into the upper mold and the lower mold to form a sand core. After the sand shooting is completed, the sliding frame 600 acts again to drive the upper core lifter 700 to move above the upper mold fixing base 200. After the sand core is shaped, the upper core lifter 700 acts to lift the sand core away from the upper mold, so that the sand core can follow the lower mold to leave, facilitating the operator to take down the sand core from the lower mold.

[0077] The sliding frame 600 realizes the switching of the upper sand shooting mechanism 400 and the upper core lifter 700, so that the two key processes of sand shooting and demolding can be carried out in order at the same position without the need for complex equipment adjustment or repositioning. This not only simplifies the work process, improves the production efficiency, but also reduces the space utilization rate, providing space for the side sand shooting mechanism 500.

[0078] Further, the sand shooting mechanism 400 and the core ejecting mechanism 700 can be independently lifted on the sliding frame 600 by the driving device. When the sand shooting mechanism 400 is lifted to the top of the upper mold fixed base 200 by the sliding frame 600, the sand shooting mechanism 400 can be lowered to the top of the upper mold, so that the sand shooting port of the sand shooting mechanism 400 can be matched with the sand inlet port of the top of the upper mold. After the sand shooting of the sand shooting mechanism 400 is completed, the sand shooting mechanism 400 is lifted away from the top of the upper mold, the sliding frame 600 drives the sand shooting mechanism 400 to leave the top of the upper mold fixed base 200, and the core ejecting mechanism 700 is driven to the top of the upper mold fixed base 200, so that the core ejecting mechanism 700 can demold the sand core by the driving device.

[0079] A better implementation of the sand shooting mechanism 400 and the core ejecting mechanism 700 is that the frame body 100 is further provided with a linear driving mechanism 810, which can be selected from an electric push rod, a hydraulic cylinder or a pneumatic cylinder. The linear driving mechanism 810 is fixed on the frame body 100 by bolts or welding, and the linear driving mechanism 810 is located above the upper mold fixed base 200, and the telescopic end of the linear driving mechanism 810 faces the upper mold fixed base 200. The sliding frame 600 supports the sand shooting mechanism 400 and the core ejecting mechanism 700 by the supporting elastic members 820, which are usually selected from compression springs or extension springs. One end of the spring is fixed on the preset fixed point of the sliding frame 600 by welding or screw, and the other end is connected with the corresponding mounting seat of the sand shooting mechanism 400 or the core ejecting mechanism 700. The mounting seat and the mechanism body are connected by bolts. According to the position of the spring fixed point on the sliding frame 600 and the mounting seat on the sand shooting mechanism 400 or the core ejecting mechanism 700, the extension spring or the compression spring is selected, for example, when the spring fixed point on the sliding frame 600 is above the mounting seat of the sand shooting mechanism 400 or the core ejecting mechanism 700, the extension spring is selected, and vice versa. The supporting elastic members 820 are uniformly distributed on the sliding frame 600, and provide the lifting elastic force and the supporting force for the sand shooting mechanism 400 and the core ejecting mechanism 700. The number of springs is adapted according to the weight of the sand shooting mechanism 400 and the core ejecting mechanism 700 and the type of the spring.

[0080] When the sand injection mechanism 400 needs to work, the sliding frame 600 drives the sand injection mechanism 400 to move above the upper mold fixing base 200. At this time, the linear driving mechanism 810 is started, the telescopic end of which is extended to push the sand injection mechanism 400 to descend along the sliding block and the guide rail to approach the upper mold fixing base 200 until the sand injection nozzle of the sand injection mechanism 400 is tightly attached to the top of the upper mold to perform the sand injection operation. After the sand injection is completed, the linear driving mechanism 810 is retracted, and the sand injection mechanism 400 is lifted away from the upper mold fixing base 200 under the action of the supporting elastic member 820. Then, the sliding frame 600 drives the upper core ejection mechanism 700 to move above the upper mold fixing base 200, and the linear driving mechanism 810 is started again to drive the upper core ejection mechanism 700 to descend to eject the sand core from the upper mold. After the demolding is completed, the linear driving mechanism 810 is retracted, and the upper core ejection mechanism 700 is lifted to reset under the action of the supporting elastic member 820.

[0081] Through the arrangement of the linear driving mechanism 810 and the supporting elastic member 820, not only is the lifting of the sand injection mechanism 400 and the upper core ejection mechanism 700 realized by only one linear driving member, but also the space utilization is improved. Moreover, the hard collision between the sand injection mechanism 400 or the upper core ejection mechanism 700 and the upper mold is avoided by the supporting elastic member 820.

[0082] Further, the sand injection mechanism 400 comprises a sand injection cylinder 410, a sand injection box 420 and a sand injection head 430. The sand injection cylinder 410 is a cylindrical structure, and the outer wall of the sand injection cylinder 410 is abutted against the steel structure on the mounting position of the sliding frame 600 to ensure the lifting direction of the sand injection cylinder 410. A sand adding port 411 is located at the top of the sand injection cylinder 410 to facilitate the addition of the sand into the sand injection cylinder 410 by gravity. The telescopic end of the linear driving mechanism 810 pushes the sand injection cylinder 410 to descend by abutting against the upper top surface of the sand injection cylinder 410.

[0083] The sand injection box 420 is a cuboid shape and is connected to the bottom of the sand injection cylinder 410 by welding or bolt connection. The sand injection box 420 has a containing space in the inside which is communicated with the sand injection cylinder 410, so that the sand entering the sand injection cylinder 410 from the sand adding port 411 can enter the sand injection box 420 under the action of gravity.

[0084] The sand injection head 430 is a plate-shaped structure and is detachably mounted at the bottom of the sand injection box 420 to support the sand in the containing space. A sealing gasket is arranged at the connection between the sand injection head 430 and the bottom of the sand injection box 420 to prevent the sand from leaking. The sand injection head 430 is adapted to the upper mold, and the sand injection head 430 has a plurality of sand injection ports corresponding to the sand injection ports of the upper mold.

[0085] The sand injection cylinder 410 has an air inlet through which compressed air can be introduced, and the compressed air can spray the sand in the sand injection box 420 from the sand injection port and enter the upper mold and the lower mold from the sand injection port of the top of the upper mold.

[0086] Further, the sand shooting head 430 is detachably connected with the sand shooting box 420, and a connecting piece 440 is arranged between the sand shooting head 430 and the sand shooting box 420, so that the sand shooting head 430 and the sand shooting box 420 can be quickly detached and installed, thereby facilitating the adaptation of different upper molds to make different sand cores. Specifically, the connecting piece 440 includes a connecting block 441 and a locking cylinder 442. The connecting block 441 is in a block structure, and a plurality of connecting blocks 441 can be arranged on the outer edge of the sand shooting head 430. The connecting block 441 is fixed on the sand shooting head 430 by welding or bolt connection. The connecting hole on the connecting block 441 is circular, and the axis direction of the connecting hole is horizontal, so that the extension end of the locking cylinder 442 can provide support force for the sand shooting head 430 after entering the connecting hole. The locking cylinder 442 is an industrial cylinder, and the cylinder body of the locking cylinder 442 is fixed on the outer wall of the sand shooting box 420 by screwing or welding, so as to ensure firm installation. The driving end of the locking cylinder 442 is a piston rod, and the end thereof is designed in a shape capable of closely fitting the connecting hole, such as a cylindrical shape, and the end can be chamfered for easy insertion into the connecting hole. The plurality of locking cylinders 442 correspond to the connecting blocks 441 one by one, so as to ensure the stability of the connection between the sand shooting head 430 and the sand shooting box 420.

[0087] Optionally, in order to ensure the sealing performance of the connection between the sand shooting head 430 and the sand shooting box 420, the connecting hole can be in a conical shape or have a beveled inner wall, so as to press the connecting sealing ring between the sand shooting head 430 and the sand shooting box 420 during the process that the extension end of the locking cylinder 442 enters the connecting hole. One end of the supporting elastic member 820 can be arranged on the outer wall of the sand shooting cylinder 410 or the outer wall of the sand shooting box 420.

[0088] When the sand shooting head 430 needs to be installed, the sand shooting head 430 is aligned with the bottom of the sand shooting box 420, so that the connecting hole on the connecting block 441 corresponds to the driving end of the locking cylinder 442 on the outer wall of the sand shooting box 420. Then, the pneumatic control system is started, air is supplied to the locking cylinder 442, the piston rod of the cylinder extends, and the driving end is inserted into the connecting hole, so as to firmly fix the sand shooting head 430 on the bottom of the sand shooting box 420. When the sand shooting head 430 needs to be detached to adapt different upper molds to make different sand cores, the air source of the locking cylinder 442 is cut off by the pneumatic control system, the piston rod is retracted, the driving end is withdrawn from the connecting hole, and the sand shooting head 430 can be easily removed at this time.

[0089] The connecting piece 440 composed of the connecting block 441 and the locking cylinder 442 can realize quick detachment and installation of the sand shooting head 430 and the sand shooting box 420. Compared with the traditional bolt connection mode, the time for replacing the sand shooting head 430 is greatly saved, the production efficiency is improved, and the equipment can quickly adapt to the needs of different sand core making.

[0090] Further, the upper core ejection mechanism 700 includes a core plate 710 and a pusher seat 720. The core plate 710 is in a plate or cylindrical shape, and one end of the elastic support 820 acts on the core plate 710, so that the core plate 710 can be raised and lowered on the sliding frame 600. The installation position on the sliding frame 600 can form a constraint in the horizontal direction of the core plate 710. In this way, the core plate 710 can move up and down along the sliding frame 600 under the constraint in the horizontal direction. The telescopic end of the linear driving mechanism 810 can abut the top of the core plate 710 to push the core plate 710 downward. After the telescopic end of the linear driving mechanism 810 is retracted, the elastic support 820 can provide a lifting reset force for the core plate 710.

[0091] The pusher seat 720 is in a cuboid shape, and is fixed on the sliding frame 600 by bolts or other detachable connection methods, so as to be convenient for replacement or adjustment according to the needs of different molds. The pusher seat 720 is internally provided with a plurality of mounting holes for mounting the pusher rods 730. The number of the pusher rods 730 matches the number of the sand inlet of the upper mold, so that the pusher rods 730 can pass through the top of the upper mold to push the sand core out of the upper mold. One end of the pusher rod 730 is inserted into the mounting hole of the pusher seat 720 and is fixed by a nut or a circlip, so as to ensure that the pusher rod 730 will not loosen in the pusher seat 720. The other end of the pusher rod 730 can be extended out of the pusher seat 720 under the driving of the core plate 710.

[0092] The pusher seat 720 is detachably arranged on the sliding frame 600, so as to be convenient for replacing the pusher seat 720 and the pusher rods 730 of different specifications or layouts according to the structure and size requirements of different sand cores, and enhancing the adaptability of the equipment to various molds, so as to meet the demolding requirements of different sand cores. On the other hand, the pusher seat 720 can be removed from the core plate 710 according to the use requirements, so as to avoid the interference between the side sanding mechanism 500 and the pusher seat 720 when the side sanding mechanism 500 is used to side sand.

[0093] In some embodiments, when the upper core ejection mechanism 700 is located above the upper mold fixing seat 200, the upper sanding mechanism 400 is located at the sanding position, so that the upper core ejection mechanism 700 can simultaneously add sand when performing the demolding action, so as to reduce the waiting time and improve the working efficiency of the equipment.

[0094] Reference Figure 5 and Figure 6A core shooter also includes a molding sand storage tank 900, which is rectangular or cylindrical in shape. The molding sand storage tank 900 is fixed to the frame 100 by welding or bolting, and is located above the upper sand shooting mechanism 400. When the upper sand shooting mechanism 400 is in the sand feeding position, the molding sand storage tank 900 is located directly above the upper sand shooting mechanism 400, and the molding sand in the molding sand storage tank 900 can enter the sand shooting cylinder 410 from the top.

[0095] Furthermore, the sand injection port 411 of the sand injection cylinder 410 is located at the top of the sand injection cylinder 410, and there is a molding sand outlet at the bottom of the molding sand storage box 900. A sliding baffle valve is provided at the outlet. When the sliding baffle valve is opened, the molding sand in the molding sand storage box 900 can fall under the action of gravity.

[0096] The sliding baffle valve 910 is fixed to the frame 100 by welding or bolting. During the process of the upper sand shooting mechanism 400 moving to the sand adding station, the side wall of the sand shooting cylinder 410 can push open the sliding baffle valve 910 so that when the sand adding port 411 at the top of the sand shooting cylinder 410 is aligned with the bottom outlet of the molding sand storage box 900, the molding sand can fall into the sand shooting cylinder 410 under the action of gravity.

[0097] The reset elastic element 920 is a compression spring. One end of the reset elastic element 920 is mounted on the mounting position of the frame 100, and the other end is fixed to the baffle of the sliding baffle valve 910. When the upper limit mechanism pushes the baffle of the sliding baffle valve 910 to slide open the bottom opening of the molding sand storage tank 900, the reset elastic element 920 is compressed. When the upper limit mechanism moves away from the sand filling position, the baffle in the sliding baffle valve 910 can slide to close the bottom outlet of the molding sand storage tank 900 under the elastic action of the reset elastic element 920.

[0098] Through the action of the sliding baffle valve 910 and the reset elastic element 920, the sand-adding operation of the sand-shooting mechanism 400 can be automatically realized through the sliding position of the sliding frame 600.

[0099] refer to Figure 1 and Figure 3 A core shooting machine also includes a scraper plate 610, which consists of a metal body and a flexible scraper. The metal body is fixed to the sliding frame 600 by bolts or welding, and the flexible scraper is fixed to the metal body by bolt connection. The flexible scraper can contact the top of the upper mold. After the upper sand shooting mechanism 400 finishes shooting sand, as the sliding frame 600 moves the upper sand shooting mechanism 400 towards the sand filling position, and before the upper core mechanism 700 reaches directly above the upper mold fixing seat 200, the scraper plate 610 can scrape off the residual molding sand on the top of the upper mold, ensuring that the sand shooting head 430 of the upper sand shooting mechanism 400 can adhere to the top of the upper mold in the next shot.

[0100] It should be further added that compressed air can enter the sand-shooting cylinder 410 from the side through a hose, or the piston rod in the linear drive mechanism 810 can be provided with a hollow structure, so that after the telescopic end of the linear drive mechanism 810 is attached to the top of the sand-shooting cylinder 410, compressed air can be blown into the sand-shooting cylinder 410 from the hollow part of the piston rod through the sand inlet.

[0101] refer to Figure 3 and Figure 4 The side-firing sand mechanism 500 is located on the side of the upper mold fixing base 200. The side-firing sand mechanism 500 includes a lifting platform 510, a sliding platform 520, and a sand-firing assembly 530. The lifting platform 510 consists of a placement plane and a scissor-type support located below the placement plane. The scissor-type support can be raised and lowered via a screw. The sliding platform 520 can slide on the placement plane of the lifting platform 510. Specifically, the sliding can be driven by a lead screw, pneumatic cylinder, hydraulic cylinder, or electric cylinder. The sliding platform 520 can slide close to the upper mold fixing base 200. For example, when using the upper sand-firing mechanism 400 for sand-firing, the sand-firing assembly 530 can slide away from the upper mold fixing base 200 under the action of the sliding platform 520, providing space for the upper sand-firing mechanism 400. When using the side-firing sand mechanism 500 for sand-firing, the sliding platform 520 can slide close to the upper mold fixing base 200, allowing the sand-firing assembly 530 to conform to the side sand inlet of the upper or lower mold for sand-firing. After sand shooting is completed, the sliding table 520 moves the sand shooting assembly 530 away from the upper mold fixing seat 200 to facilitate the separation of the upper mold and the lower mold.

[0102] The sand-shooting assembly 530 is mounted on the sliding table 520 by bolts or welding. The sand-shooting assembly 530 has a sand filling port 411 connected to the molding sand storage box 900, a gas connection port 531 for introducing compressed air, and a sand-shooting port 532 for spraying molding sand. The sand-shooting port 532 can enter between the upper mold and the lower mold after the mold is closed, so that the molding sand can enter between the upper mold and the lower mold under the action of air pressure.

[0103] The combination of the lifting platform 510, sliding platform 520 and sand injection assembly 530 of the side sand injection mechanism 500 allows it to flexibly adjust its position to adapt to molds of different sizes and structures, inject molding sand into the mold cavity from the side, and move the sand injection assembly 530 to avoid the upper sand injection mechanism 400 according to different mold conditions, thereby improving the flexibility and adaptability of the overall device.

[0104] A core firing method, which uses a core firing machine to fire the core, includes an upper core firing method and a side core firing method;

[0105] The top-firing method includes:

[0106] S110, the upper mold with the sand inlet at the top is fixed on the upper mold fixing seat 200, and the lower mold is fixed on the lifting lower mold seat 300;

[0107] S120, the lifting lower mold base 300 drives the lower mold to rise and meet with the upper mold;

[0108] S130, after the upper sand injection mechanism 400 is moved to fit the top of the upper mold, the upper sand injection mechanism 400 injects molding sand between the upper mold and the lower mold through the sand inlet to form a sand core;

[0109] S131, after the sand injection mechanism 400 completes the sand injection, the sliding frame 600 drives the sand injection mechanism 400 away from the upper mold fixing seat 200 and stays in the sand filling position. The molding sand in the molding sand storage box 900 enters the sand injection mechanism 400, and the upper core mechanism 700 moves to the upper sand injection mechanism 400.

[0110] S140, after the sand core hardens, the upper core mechanism 700 pushes the sand core away from the upper mold, so that the sand core falls on the lower mold and can follow the lower mold away from the upper mold.

[0111] S141, after the lower mold moves the sand core away from the upper mold, it can move horizontally under the action of the horizontal guide rail, which makes it easier for the operator to remove the sand core from the lower mold.

[0112] Side-firing core methods include:

[0113] S210, the upper mold with a sand inlet on the side is fixed on the upper mold fixing seat 200, and the lower mold is fixed on the lifting lower mold seat 300;

[0114] S220, the lifting lower mold base 300 drives the lower mold to rise and meet with the upper mold;

[0115] S230, after the side sand injection mechanism 500 moves to fit against the side of the upper mold, the side sand injection mechanism 500 injects molding sand between the upper mold and the lower mold through the sand inlet to form a sand core;

[0116] S240, after the sand core hardens and is demolded, the sand core falls onto the lower mold and can follow the lower mold away from the upper mold.

[0117] S241, after the lower mold moves the sand core away from the upper mold, it can move horizontally under the action of the horizontal guide rail, which makes it easier for the operator to remove the sand core from the lower mold.

[0118] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A core shooting machine, characterized in that, include: Frame (100); An upper mold fixing seat (200) is provided on the frame (100) for fixing the upper mold; The lower mold base (300) is lifted and installed on the frame (100) and located below the upper mold fixing base (200). The lower mold base (300) can drive the lower mold to rise and approach the upper mold to close with the upper mold. The upper sand injection mechanism (400) is movably mounted on the frame (100). The upper sand injection mechanism (400) can be lowered to contact the top of the upper mold so that the molding sand in the upper sand injection mechanism (400) can enter between the upper mold and the lower mold under the action of gas. At least one side-jetting sand mechanism (500) is movably mounted on the frame (100). The side-jetting sand mechanism (500) can be translated to contact the side of the upper mold so that the molding sand in the side-jetting sand mechanism (500) can enter between the upper mold and the lower mold under the action of gas. The side-jetting sand mechanism (500) and the upper-jetting sand mechanism (400) operate independently. A sliding frame (600) is horizontally slidably disposed on the frame body (100) and located above the upper mold fixing seat (200); the upper sand shooting mechanism (400) is disposed on the sliding frame (600); The upper ejector mechanism (700) is mounted on the sliding frame (600). The sliding frame (600) can drive the upper sand injection mechanism (400) and the upper ejector mechanism (700) to move horizontally above the upper mold fixing seat (200) one after the other. The upper ejector mechanism (700) can push the mold core between the upper mold and the lower mold away from the upper mold after the upper sand injection mechanism (400) has finished sand injection. The upper sand injection mechanism (400) and the upper core mechanism (700) are both elliptically mounted on the sliding frame (600). Both the upper sand injection mechanism (400) and the upper core mechanism (700) can descend to approach the upper mold fixing seat (200). The system also includes: A linear drive mechanism (810) is provided on the top of the frame (100). The linear drive mechanism (810) is used to drive the upper sand injection mechanism (400) or the upper core mechanism (700) to descend and approach the upper mold fixing seat (200). A plurality of support elastic elements (820) are provided, and all of the support elastic elements (820) are disposed on the sliding frame (600). The support elastic elements (820) are used to act on the upper sand injection mechanism (400) or the upper core mechanism (700). The support elastic elements (820) are used to provide a force for the upper sand injection mechanism (400) or the upper core mechanism (700) to rise away from the upper mold fixing seat (200). The upper sand-shooting mechanism (400) includes: The sand-shooting cylinder (410) is raised and lowered on the sliding frame (600). The sand-shooting cylinder (410) has a sand-filling port. When the sand-shooting cylinder (410) is located below the linear drive mechanism (810), it can descend and approach the upper mold fixing seat (200) under the pushing action of the linear drive mechanism (810). A sand-shooting box (420) is disposed at the bottom of the sand-shooting cylinder (410). The sand-shooting box (420) has a holding space that communicates with the interior of the sand-shooting cylinder (410). The holding space is used to hold molding sand. A sand-shooting head (430) is provided at the bottom of the sand-shooting box (420). The sand-shooting head (430) has several sand-shooting ports, and the molding sand in the holding space can enter between the upper mold and the lower mold through the sand-shooting ports under the action of air pressure. The side-jetting sand mechanism (500) is located on the side of the upper mold fixing base (200), and the side-jetting sand mechanism (500) includes: A lifting platform (510) is lifted and installed on the frame (100), and the lifting platform (510) can be lifted and moved closer to the upper mold fixing seat (200). A sliding table (520) is slidably disposed on the lifting table (510), and the sliding table (520) can slide close to the upper mold fixing seat (200). A sand-shooting assembly (530) is disposed on the sliding table (520). The sand-shooting assembly (530) has a sand inlet, a gas connection port (531) and a sand-blasting port (532). The sand-blasting port (532) can enter between the upper mold and the lower mold after the mold is closed, so that the molding sand can enter between the upper mold and the lower mold under the action of air pressure.

2. A core shooter according to claim 1, characterized in that, The sand-shooting head (430) is detachably connected to the sand-shooting box (420) via a connector (440), the connector (440) comprising: A plurality of connecting blocks (441) are provided, and all of the connecting blocks (441) are provided on the outer edge of the sand-shooting head (430). Each connecting block (441) has a horizontally penetrating connecting hole. There are several locking cylinders (442), and all of the locking cylinders (442) are disposed on the outer wall of the sand-shooting box (420). Each locking cylinder (442) corresponds to a connecting block (441). The driving end of the locking cylinder (442) can extend horizontally into the connecting hole so that the sand-shooting head (430) is fixed at the bottom of the sand-shooting box (420).

3. A core shooter according to claim 1, characterized in that, The upper core mechanism (700) includes: The top core plate (710) is lifted and lowered on the sliding frame (600), and the top core plate (710) can be lowered and approach the upper mold fixing seat (200) under the action of the linear drive mechanism (810). The push base (720) is detachably mounted on the sliding frame (600). The push base (720) has a plurality of push rods (730). The push rods (730) can extend downward from the push base (720) under the drive of the core plate (710) and extend between the upper mold and the lower mold to push the sand core to fall onto the lower mold, and make the sand core follow the lower mold down away from the upper mold fixing seat (200).

4. A core shooter according to claim 1, characterized in that, When the upper core mechanism (700) is located above the upper mold fixing seat (200), the upper sand shooting mechanism (400) is located in the sand adding position, and the core shooting machine further includes: A molding sand storage box (900) is installed on the frame (100). When the upper sand injection mechanism (400) is in the sand injection position, the sand injection port of the sand injection cylinder (410) is connected to the bottom of the molding sand storage box (900).

5. A core shooter according to claim 4, characterized in that, Also includes: A scraper (610) is provided on the sliding frame (600). The scraper (610) is located between the upper sand injection mechanism (400) and the upper core mechanism (700). The scraper (610) can slide and abut against the top of the upper mold under the translational drive of the sliding frame (600) to scrape off the molding sand remaining on the top of the upper mold.

6. A core-shooting method, comprising core-shooting using a core-shooting machine according to any one of claims 1 to 5, characterized in that, This includes an upper core-firing method for sand firing using the upper sand-firing mechanism (400) and a side core-firing method for sand firing using the side sand-firing mechanism (500). The aforementioned core-shooting method includes the following steps: S110, fix the upper mold with the sand inlet on the top to the upper mold fixing seat (200), and fix the lower mold to the lifting lower mold seat (300); S120, the lower mold base (300) is raised to drive the lower mold to rise and close with the upper mold; S130, move the upper sand injection mechanism (400) to contact the top of the upper mold, and inject molding sand between the upper mold and the lower mold through the sand inlet to form a sand core; S140, after the sand core hardens, demold it so that the sand core falls onto the lower mold and can follow the lower mold down away from the upper mold; The side-firing core method includes the following steps: S210, fix the upper mold with the sand inlet on the side to the upper mold fixing seat (200), and fix the lower mold to the lifting lower mold seat (300); S220, the lower mold base (300) is raised to drive the lower mold to rise and close with the upper mold; S230, the side sand injection mechanism (500) is moved to contact the side of the upper mold, and molding sand is injected between the upper mold and the lower mold through the sand inlet to form a sand core; S240, after the sand core hardens, demold it so that the sand core falls onto the lower mold and can follow the lower mold down away from the upper mold.

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