Core making machine and sand shooting mechanism thereof

Abstract

The invention provides a core making machine and a sand shooting mechanism thereof, and relates to the technical field of casting equipment.The core making machine comprises the sand shooting mechanism, the sand shooting mechanism comprises a driving mechanism, a sand adding hopper, a sand shooting ventilation seat and a ventilation connecting seat, and a sand shooting ventilation cavity is formed in the sand shooting ventilation seat; the sand shooting ventilation seat is further provided with an air inlet of the sand shooting ventilation cavity and an air outlet of the sand shooting ventilation cavity, and the driving mechanism drives the sand adding hopper and the sand shooting ventilation seat to move between a first position and a second position; at the first position, the sand adding hopper is connected with a sand storage cylinder of the core making machine; at the second position, the air inlet of the sand shooting ventilation cavity is communicated with the ventilation connecting seat, and the air outlet of the sand shooting ventilation cavity is connected with the sand storage cylinder. The sand adding hopper and the sand shooting ventilation seat are respectively connected with the sand storage cylinder, and the sand shooting ventilation seat does not need to be arranged below the sand adding hopper, so that the arrangement height of the sand adding hopper can be reduced, and the overall height of the sand shooting mechanism and the core making machine can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of casting equipment, in particular to a core making machine and a sand shooting mechanism thereof. Background Art

[0002] In casting equipment technology, the core making machine is a device for making sand cores required for casting molding. Sand adding and sand shooting are one of the most critical functions in the core making process, which mainly enables the core making machine to fill the core sand into the core box.

[0003] When realizing the function of adding core sand, that is, the sand adding function, the core sand needs to enter the sand storage barrel through the sand adding hopper; when realizing the inflation sand shooting function, the sand shooting ventilation chamber must be tightly connected with the sand storage barrel. In the core making machine, the position of the sand storage barrel is fixed. In order to realize the connection between the sand adding hopper and the sand storage barrel and the connection between the sand shooting ventilation chamber and the sand storage barrel respectively, an additional transition hopper needs to be set. When adding sand, the transition hopper moves between the sand adding hopper and the sand storage barrel to connect the sand adding hopper and the sand storage barrel. When shooting sand, the transition hopper moves away from between the sand adding hopper and the sand storage barrel, and the sand shooting ventilation chamber moves between the sand adding hopper and the sand storage barrel. The sand shooting ventilation chamber is connected to the sand storage barrel for inflation sand shooting.

[0004] The defect of the prior art is that the sand shooting ventilation chamber is installed below the lower sand hopper, which causes the overall height of the core making equipment to be relatively high and has high requirements on the height of the space for installation and use. Summary of the invention

[0005] In a first aspect, the present invention provides a sand-shooting mechanism of a core-making machine, comprising: a driving mechanism, a sand-adding hopper, a sand-shooting ventilation seat and a ventilation connection seat, wherein a sand-shooting ventilation cavity is provided in the sand-shooting ventilation seat, and the sand-shooting ventilation seat is further provided with an air inlet of the sand-shooting ventilation cavity and an air outlet of the sand-shooting ventilation cavity, and the driving mechanism drives the sand-adding hopper and the sand-shooting ventilation seat to move between a first position and a second position;

[0006] When in the first position, the sand feeding hopper is connected to the sand storage barrel of the core making machine;

[0007] In the second position, the air inlet of the sand-shooting ventilation cavity is connected to the ventilation connection seat, and the air outlet of the sand-shooting ventilation cavity is connected to the sand storage cylinder;

[0008] When the sand adding hopper and the sand shooting vent seat move between the first position and the second position, the relative position between the sand adding hopper and the sand shooting vent seat remains fixed.

[0009] In an optional embodiment, the air inlet of the sand blasting ventilation cavity is arranged on the first connecting surface of the sand blasting ventilation seat, the first connecting surface is connected to the ventilation connecting seat, and the first connecting surface is arranged to intersect with the moving direction when the driving mechanism drives the sand blasting ventilation seat to move from the first position to the second position.

[0010] In an optional embodiment, the sand-shooting ventilation seat is provided with two first connection surfaces, the two first connection surfaces are respectively provided on both sides of the sand-shooting ventilation seat, and each first connection surface is connected to a ventilation connection seat.

[0011] In an optional embodiment, the first connecting surface is arranged perpendicular to a moving direction when the driving mechanism drives the sand-blasting vent seat to move from the first position to the second position.

[0012] In an optional embodiment, the air outlet of the sand-shooting ventilation cavity is arranged on the second connecting surface of the sand-shooting ventilation seat, the second connecting surface is connected to the sand storage cylinder, the second connecting surface is provided with an inflatable sealing ring, and the second connecting surface and the sand storage cylinder are sealed by the inflatable sealing ring.

[0013] In an optional embodiment, the driving mechanism includes a driving assembly and a supporting assembly, the sand-shooting vent seat and the sand-adding hopper are both arranged on the supporting assembly, and the driving assembly drives the supporting assembly to move, so that the sand-adding hopper and the sand-shooting vent seat move between a first position and a second position.

[0014] In an optional embodiment, the support assembly includes a first support member and a second support member, the sand adding hopper is arranged on the first support member, and the sand shooting ventilation seat is arranged on the second support member.

[0015] In an optional embodiment, the first support member and the second support member are connected via a detachable connecting member.

[0016] In an optional embodiment, a pneumatic pressure switch is further included. The pneumatic pressure switch is arranged in the air circuit of the sand shooting mechanism. When the sand shooting vent seat is located at the second position, the pneumatic pressure switch detects the sealing of the air circuit of the sand shooting mechanism.

[0017] In a second aspect, the present invention provides a core making machine, comprising a sand shooting mechanism according to any one of the aforementioned embodiments.

[0018] The core making machine and its sand shooting mechanism provided by the present invention have a sand adding hopper and a sand shooting ventilation seat that move between a first position and a second position. When in the first position, the sand adding hopper is connected to the sand storage barrel of the core making machine, so sand can be added; when in the second position, the air inlet of the sand shooting ventilation chamber is connected to the ventilation connecting seat, and the air outlet of the sand shooting ventilation chamber is connected to the sand storage barrel, so sand shooting can be carried out; the sand adding hopper and the sand shooting ventilation seat are respectively connected to the sand storage barrel, and the sand shooting ventilation seat does not need to be arranged below the sand adding hopper, so the arrangement height of the sand adding hopper can be reduced, and thus the overall height of the sand shooting mechanism and the core making machine can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the sand-shooting state of the core-making machine provided by an embodiment of the present invention;

[0021] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0022] Figure 3 One of the three-dimensional schematic diagrams of the sand adding hopper and the sand shooting ventilation seat of the sand shooting mechanism provided by the embodiment of the present invention when they are located in the first position;

[0023] Figure 4 The second stereoscopic schematic diagram of the sand adding hopper and the sand shooting ventilation seat of the sand shooting mechanism provided by the embodiment of the present invention when they are located in the first position;

[0024] Figure 5 A side schematic diagram of a sand adding hopper and a sand shooting ventilation seat of a sand shooting mechanism provided by an embodiment of the present invention when they are located in a first position;

[0025] Figure 6 A side schematic diagram of the sand adding hopper and the sand shooting ventilation seat of the sand shooting mechanism provided in an embodiment of the present invention when they are located in the second position.

[0026] Icons: 100-driving mechanism; 110-driving assembly; 120-support assembly; 121-first support member; 122-second support member; 200-sand hopper; 300-sand shooting ventilation seat; 310-first connecting surface; 311-air inlet; 320-second connecting surface; 322-inflatable sealing ring; 330-sand shooting ventilation cavity; 340-filter screen; 400-ventilation connecting seat; 500-sand storage cylinder; 600-core box; 700-nozzle; 800-air bag part; 900-sand shooting valve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] The embodiment of the present invention provides a sand-shooting mechanism, which includes: a driving mechanism 100, a sand-adding hopper 200, a sand-shooting ventilation seat 300, and a ventilation connection seat 400. A sand-shooting ventilation cavity 330 is provided in the sand-shooting ventilation seat 300, and the sand-shooting ventilation seat 300 is also provided with an air inlet 311 of the sand-shooting ventilation cavity 330 and an air outlet of the sand-shooting ventilation cavity 330. The driving mechanism 100 drives the sand-adding hopper 200 and the sand-shooting ventilation seat 300 to move between a first position and a second position.

[0035] In the first position, the sand adding hopper 200 is connected to the sand storage cylinder 500 of the core making machine;

[0036] In the second position, the air inlet 311 of the sand-shooting ventilation cavity 330 is connected to the ventilation connection seat 400, and the air outlet of the sand-shooting ventilation cavity 330 is connected to the sand storage cylinder 500;

[0037] When the sand adding hopper 200 and the sand shooting vent seat 300 move between the first position and the second position, the relative position between the sand adding hopper 200 and the sand shooting vent seat 300 remains fixed.

[0038] Figure 3 One of the three-dimensional schematic diagrams of the sand adding hopper 200 and the sand shooting ventilation seat 300 of the sand shooting mechanism provided by the embodiment of the present invention when they are located in the first position; Figure 4 The second stereoscopic schematic diagram of the sand adding hopper 200 and the sand shooting ventilation seat 300 of the sand shooting mechanism provided by the embodiment of the present invention when they are located in the first position; Figure 5 A side schematic diagram of the sand adding hopper 200 and the sand shooting ventilation seat 300 of the sand shooting mechanism provided in an embodiment of the present invention when they are located in a first position. Figures 3 to 5 Other structures of the sand making machine are omitted.

[0039] When the sand adding hopper 200 and the sand shooting vent seat 300 of the sand shooting mechanism are located at the first position, the sand adding hopper 200 is connected to the sand storage barrel 500 of the core making machine. At this time, the sand shooting mechanism is in a sand adding state, and the sand adding function can be realized. The core sand can be added to the sand adding hopper 200 and then fall into the sand storage barrel 500 from the sand adding hopper 200. The sand adding hopper 200 is located above the sand storage barrel 500. The core sand added to the sand adding hopper 200 can come from a sand mixer or other sand supply equipment. The core sand in the sand adding hopper 200 can pass through the lower sand butterfly valve before entering the sand storage barrel 500, that is, the lower sand butterfly valve can be set in the sand adding hopper 200, and the present invention does not limit this.

[0040] Figure 1 A schematic diagram of the sand-shooting state of the core-making machine provided in an embodiment of the present invention, Figure 6 A side schematic diagram of the sand adding hopper 200 and the sand shooting ventilation seat 300 of the sand shooting mechanism provided in an embodiment of the present invention when they are located in the second position.

[0041] In the core making machine, the air bag part 800, the sand shooting valve 900 and the ventilation connection seat 400 are all fixed. When the driving mechanism 100 drives the sand shooting ventilation seat 300 to the second position, the sand shooting ventilation seat 300 is connected with the ventilation connection seat 400, so that the air inlet 311 of the sand shooting ventilation cavity 330 is connected with the ventilation connection seat 400. At the same time, the air outlet of the sand shooting ventilation cavity 330 is connected with the sand storage cylinder 500, and a complete air path is formed at this time. Figure 1 As shown, the complete gas circuit includes the air bag part 800, the sand shooting valve 900, the ventilation connection seat 400, the sand shooting ventilation seat 300, and the sand storage bucket nozzle 700. After the complete gas circuit is formed, the sand shooting operation can be started, and the core sand in the sand storage bucket is shot into the core box 600.

[0042] When the sand adding bucket 200 and the sand shooting vent seat 300 move between the first position and the second position, the relative position between the sand adding bucket 200 and the sand shooting vent seat 300 remains fixed. Therefore, the sand shooting mechanism can repeatedly switch between the sand adding state and the sand shooting state, and the sand shooting mechanism can repeatedly switch the state only through the driving mechanism 100, which is highly efficient.

[0043] The core making machine and its sand shooting mechanism provided by the embodiment of the present invention, the sand adding hopper 200 and the sand shooting ventilation seat 300 move between a first position and a second position. When in the first position, the sand adding hopper 200 is connected to the sand storage barrel 500 of the core making machine, and sand can be added; when in the second position, the air inlet 311 of the sand shooting ventilation chamber 330 is connected to the ventilation connecting seat 400, and the air outlet of the sand shooting ventilation chamber 330 is connected to the sand storage barrel 500, so sand shooting can be performed; the sand adding hopper 200 and the sand shooting ventilation seat 300 are respectively connected to the sand storage barrel 500, and the sand shooting ventilation seat 300 does not need to be arranged below the sand adding hopper 200, so the arrangement height of the sand adding hopper 200 can be reduced, and thus the overall height of the sand shooting mechanism and the core making machine can be effectively reduced.

[0044] In an optional embodiment, the air inlet 311 of the sand blasting ventilation cavity 330 is arranged on the first connecting surface 310 of the sand blasting ventilation seat 300, the first connecting surface 310 is connected to the ventilation connecting seat 400, and the first connecting surface 310 is arranged to intersect with the moving direction when the driving mechanism 100 drives the sand blasting ventilation seat 300 to move from the first position to the second position.

[0045] The first connection surface 310 is set to intersect with the moving direction of the sand-shooting vent seat 300. At this time, when the sand-shooting vent seat 300 is in the second position, the driving force applied by the driving mechanism 100 to the sand-shooting vent seat 300 can act on the contact surface between the first connection surface 310 and the ventilation connection seat 400, and the driving mechanism 100 can play a role in improving or ensuring the sealing of the connection between the first connection surface 310 and the ventilation connection seat 400. In this way, the driving mechanism 100 can not only realize the function of switching the sand-adding state and the sand-shooting state of the sand-shooting mechanism, but also play the role of ensuring the sealing of the air path in the sand-shooting state. Compared with the mechanism in the prior art that needs to use an independent pressure mechanism to ensure the sealing of the sand-shooting vent seat 300 and the ventilation connection seat 400, this embodiment can simplify the structure and components, cancel the separate pressure mechanism, and use the driving mechanism 100 to realize the function of the pressure mechanism in the prior art, so that the structure of the core making machine and the sand-shooting mechanism is simpler.

[0046] In an optional embodiment, if Figures 1 to 6 As shown, the first connecting surface 310 is arranged perpendicular to the moving direction when the driving mechanism 100 drives the sand-shooting ventilation seat 300 to move from the first position to the second position. The driving force applied by the driving mechanism 100 to the sand-shooting ventilation seat 300 will not generate a component force when acting on the contact surface between the first connecting surface 310 and the ventilation connecting seat 400, thereby achieving better connection sealing between the contact surfaces of the first connecting surface 310 and the ventilation connecting seat 400.

[0047] In an optional embodiment, if Figure 3 and Figure 4 As shown, the sand-shooting vent seat 300 is provided with two first connection surfaces 310, which are respectively provided on both sides of the sand-shooting vent seat 300, and each first connection surface 310 is connected to a ventilation connection seat 400. Each first connection surface 310 is provided with an air inlet 311 of the sand-shooting vent cavity 330, which can increase the air intake of the sand-shooting vent seat 300 and make the forces on both sides of the sand-shooting vent seat 300 symmetrical during the sand-shooting process, especially when the driving mechanism 100 passes through a guide component, for example, a guide rail is used as a guide component, the forces on both sides of the sand-shooting vent seat 300 are symmetrical, which can avoid asymmetrical wear caused by the force on one side of the guide component.

[0048] In an optional embodiment, if Figure 2 As shown, Figure 2 for Figure 1In the partially enlarged schematic diagram at A in the middle, the air outlet of the sand-shooting ventilation cavity 330 is arranged on the second connecting surface 320 of the sand-shooting ventilation seat 300, and the second connecting surface 320 is connected to the sand storage cylinder 500. The second connecting surface 320 is provided with an inflatable sealing ring 322, and a sealed connection is achieved between the second connecting surface 320 and the sand storage cylinder 500 through the inflatable sealing ring 322. One side of the inflatable sealing ring 322 is arranged opposite to the sand storage cylinder, and the other side is arranged opposite to the sand-shooting ventilation cavity 330. When high-pressure gas enters the sand-shooting ventilation cavity 330 of the sand-shooting ventilation seat 300, the high-pressure gas will expand the inflatable sealing ring 322, so that the inflatable sealing ring 322 plays the role of achieving a sealed connection between the second connecting surface 320 and the sand storage cylinder 500.

[0049] In an optional embodiment, if Figures 3 to 6 As shown, the driving mechanism 100 includes a driving assembly 110 and a supporting assembly 120. The sand-shooting vent seat 300 and the sand-adding hopper 200 are both arranged on the supporting assembly 120. The driving assembly 110 drives the supporting assembly 120 to move, so that the sand-adding hopper 200 and the sand-shooting vent seat 300 move between the first position and the second position. The driving assembly 110 can adopt a cylinder or other driving form that can realize linear drive. The sand-shooting vent seat 300 and the sand-adding hopper 200 are both arranged on the supporting assembly 120. The supporting assembly 120 ensures that when the sand-adding hopper 200 and the sand-shooting vent seat 300 move between the first position and the second position, the relative position between the sand-adding hopper 200 and the sand-shooting vent seat 300 remains fixed.

[0050] In an optional embodiment, if Figure 4 As shown, the support assembly 120 includes a first support member 121 and a second support member 122, the sand adding hopper 200 is arranged on the first support member 121, and the sand shooting vent seat 300 is arranged on the second support member 122. The sand adding hopper 200 and the sand shooting vent seat 300 are respectively arranged on one support member, which is convenient for independently installing the sand adding hopper 200 and the sand shooting vent seat 300, and then the first support member 121 and the second support member 122 are connected to keep the relative position between the sand adding hopper 200 and the sand shooting vent seat 300 fixed.

[0051] In an optional embodiment, the first support member 121 and the second support member 122 are connected by a detachable connecting member, and the connecting member can be removed or replaced. By replacing the connecting member, the relative position of the first support member 121 and the second support member 122 can be adjusted, thereby adjusting the relative distance between the sand adding hopper 200 and the sand shooting ventilation seat 300, thereby facilitating the adjustment of the space occupied by the sand shooting mechanism and the core making machine.

[0052] In an optional embodiment, a pneumatic pressure switch is further included. The pneumatic pressure switch is arranged in the air circuit of the sand shooting mechanism. When the sand shooting vent seat 300 is located in the second position, the pneumatic pressure switch detects the sealing of the air circuit of the sand shooting mechanism. The pneumatic pressure switch is used to detect the sealing of the air circuit of the sand shooting mechanism. The sand shooting operation is performed only when the sealing meets the standard, thereby ensuring the safety of the sand shooting operation. When the pneumatic sealing ring 322 is used to achieve the sealing connection effect between the second connecting surface 320 and the sand storage cylinder 500, the pneumatic pressure switch can also detect the sealing effect of the pneumatic sealing ring 322, and timely discover the failure of the pneumatic sealing ring 322, so as to facilitate timely replacement and maintenance.

[0053] In an optional embodiment, if Figure 5 As shown, a filter screen 340 is provided near the air outlet in the sand shooting ventilation chamber 330, and the air outlet of the sand shooting ventilation chamber 330 and the second surface of the sand shooting ventilation seat 300 are at the same or substantially the same height as the bottom surface of the sand adding hopper 200, so that the filter screen 340 can be replaced from the air outlet of the sand shooting ventilation chamber 330. Compared with the structural design in the prior art that the sand shooting ventilation chamber 330 is arranged below the sand adding hopper 200, the technical effect of more conveniently replacing the filter screen 340 can be achieved.

[0054] An embodiment of the present invention provides a core making machine, comprising a sand shooting mechanism according to any one of the aforementioned embodiments, and the core making machine can achieve the advantages of the aforementioned sand shooting mechanism.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand-shooting mechanism for a core-making machine, characterized in that: include: A driving mechanism (100), a sand adding bucket (200), a sand shooting ventilation seat (300) and a ventilation connection seat (400); a sand shooting ventilation cavity (330) is provided in the sand shooting ventilation seat (300); the sand shooting ventilation seat (300) is also provided with an air inlet (311) of the sand shooting ventilation cavity (330) and an air outlet of the sand shooting ventilation cavity (330); the driving mechanism (100) drives the sand adding bucket (200) and the sand shooting ventilation seat (300) to move between a first position and a second position; When in the first position, the sand adding hopper (200) is connected to the sand storage cylinder (500) of the core making machine; When in the second position, the air inlet (311) of the sand-shooting ventilation cavity (330) is connected to the ventilation connection seat (400), and the air outlet of the sand-shooting ventilation cavity (330) is connected to the sand storage cylinder (500); When the sand adding hopper (200) and the sand shooting ventilation seat (300) move between the first position and the second position, the relative position between the sand adding hopper (200) and the sand shooting ventilation seat (300) remains fixed.

2. The sand-shooting mechanism of the core-making machine according to claim 1, characterized in that: The air inlet (311) of the sand-shooting ventilation cavity (330) is arranged on the first connecting surface (310) of the sand-shooting ventilation seat (300), the first connecting surface (310) is connected to the ventilation connecting seat (400), and the first connecting surface (310) is arranged to intersect with the moving direction when the driving mechanism (100) drives the sand-shooting ventilation seat (300) to move from a first position to a second position.

3. The sand-shooting mechanism of the core-making machine according to claim 2, characterized in that: The sand-shooting ventilation seat (300) is provided with two first connection surfaces (310), the two first connection surfaces (310) are respectively arranged on two sides of the sand-shooting ventilation seat (300), and each of the first connection surfaces (310) is connected to a ventilation connection seat (400).

4. The sand-shooting mechanism of the core-making machine according to claim 2, characterized in that: The first connecting surface (310) is arranged perpendicular to the moving direction when the driving mechanism (100) drives the sand-shooting ventilation seat (300) to move from the first position to the second position.

5. The sand-shooting mechanism of the core-making machine according to claim 1, characterized in that: The air outlet of the sand-shooting ventilation cavity (330) is arranged on the second connecting surface (320) of the sand-shooting ventilation seat (300), the second connecting surface (320) is connected to the sand storage cylinder (500), the second connecting surface (320) is provided with an air-expanding sealing ring (322), and the second connecting surface (320) and the sand storage cylinder (500) are sealed by the air-expanding sealing ring (322).

6. The sand-shooting mechanism of the core-making machine according to claim 1, characterized in that: The driving mechanism (100) comprises a driving component (110) and a supporting component (120); the sand-shooting ventilation seat (300) and the sand-adding hopper (200) are both arranged on the supporting component (120); the driving component (110) drives the supporting component (120) to move, so that the sand-adding hopper (200) and the sand-shooting ventilation seat (300) move between a first position and a second position.

7. The sand-shooting mechanism of the core-making machine according to claim 6, characterized in that: The support assembly (120) comprises a first support member (121) and a second support member (122), the sand adding hopper (200) is arranged on the first support member (121), and the sand shooting ventilation seat (300) is arranged on the second support member (122).

8. The sand-shooting mechanism of the core-making machine according to claim 7, characterized in that: The first support member (121) and the second support member (122) are connected via a detachable connecting member.

9. The sand-shooting mechanism of the core-making machine according to claim 1, characterized in that: It also comprises a pneumatic pressure switch, which is arranged in the air path of the sand-shooting mechanism. When the sand-shooting vent seat (300) is located at the second position, the pneumatic pressure switch detects the sealing performance of the air path of the sand-shooting mechanism.

10. A core making machine, characterized in that: It comprises the sand shooting mechanism according to any one of claims 1-9.

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