Core making machine and sand shooting mechanism thereof

Abstract

A sand shooting mechanism, comprising: a driving mechanism (100), a sand feeding hopper (200), a sand-shooting venting seat (300) and venting connection seats (400), wherein the sand-shooting venting seat is internally provided with a sand-shooting venting cavity (330); the sand-shooting venting seat is further provided with an air inlet (311) of the sand-shooting venting cavity and an air outlet of the sand-shooting venting cavity; the driving mechanism drives the sand feeding hopper and the sand-shooting venting seat to move between a first position and a second position; when in the first position, the sand feeding hopper is connected to a sand storage cylinder (500) of a core making machine; and when in the second position, the air inlet of the sand-shooting venting cavity is in communication with the venting connection seat, and the air outlet of the sand-shooting venting cavity is connected to the sand storage cylinder. A sand shooting machine comprising the sand shooting mechanism. In the sand shooting mechanism, the sand feeding hopper and the sand-shooting venting seat are each connected to the sand storage cylinder, and it is not necessary to arrange the sand-shooting venting seat below the sand feeding hopper, such that the arrangement height of the sand feeding hopper can be reduced, thereby effectively reducing the overall heights of the sand shooting mechanism and the core making machine.

Description

A core-making machine and its sand-shooting mechanism

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 2024118124572, filed on December 10, 2024, entitled “A Core Making Machine and its Sand-Shooting Mechanism,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of casting equipment technology, and in particular to a core-making machine and its sand-shooting mechanism. Background Technology

[0004] In casting equipment technology, the core-making machine is the equipment used to manufacture the sand cores required for casting. The sand addition and sand injection processes are among the most critical functions in the core-making process, which mainly enable the core-making machine to fill the core box with core sand.

[0005] When adding core sand, the core sand needs to enter the sand storage cylinder through the sand adding hopper. When performing the aeration and sand injection function, the sand injection venting chamber must be sealed to the sand storage cylinder. In the core-making machine, the sand storage cylinder is fixed in position. To connect the sand adding hopper to the sand storage cylinder and the sand injection venting chamber to the sand storage cylinder respectively, an additional transition hopper is required. During sand adding, the transition hopper moves between the sand adding hopper and the sand storage cylinder, connecting them. During sand injection, the transition hopper moves away from between the sand adding hopper and the sand storage cylinder, and the sand injection venting chamber moves between the sand adding hopper and the sand storage cylinder, connecting to the sand storage cylinder for aeration and sand injection.

[0006] The drawback of the existing technology is that the sand-shooting ventilation chamber is installed below the lower sand hopper, which results in the overall height of the core-making equipment being too high, requiring a large space for installation and use.

[0007] Public content

[0008] In a first aspect, the present disclosure provides a sand-shooting mechanism for a core-making machine, comprising: a driving mechanism, a sand-adding hopper, a sand-shooting vent seat, and a venting connection seat. The sand-shooting vent seat is provided with a sand-shooting vent chamber, and the sand-shooting vent seat is also provided with an air inlet and an air outlet of the sand-shooting vent chamber. The driving mechanism drives the sand-adding hopper and the sand-shooting vent seat to move between a first position and a second position.

[0009] In the first position, the sand hopper is connected to the sand storage cylinder of the core-making machine;

[0010] In the second position, the air inlet of the sand-shooting vent is connected to the venting connector, and the air outlet of the sand-shooting vent is connected to the sand storage cylinder.

[0011] When the sand adding hopper and the sand spraying vent seat move between the first position and the second position, the relative position between the sand adding hopper and the sand spraying vent seat remains fixed.

[0012] Optionally, the air inlet of the sand-shooting ventilation chamber is located on the first connecting surface of the sand-shooting ventilation seat. The first connecting surface is connected to the ventilation connecting seat, and the first connecting surface is intersected with the direction of movement of the sand-shooting ventilation seat when the driving mechanism drives it to move from the first position to the second position.

[0013] Optionally, the sand-shooting vent seat has two first connecting surfaces, which are respectively located on both sides of the sand-shooting vent seat, and each first connecting surface is connected to a vent connecting seat.

[0014] Optionally, the first connecting surface is set perpendicular to the direction of movement when the drive mechanism drives the sand-shooting vent seat to move from the first position to the second position.

[0015] Optionally, the air outlet of the sand-shooting ventilation chamber is located 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 air-expanding sealing ring. The second connecting surface and the sand storage cylinder are sealed together by the air-expanding sealing ring.

[0016] Optionally, the drive mechanism includes a drive assembly and a support assembly. The sand-shooting vent seat and the sand-adding hopper are both mounted on the support assembly. The drive assembly drives the support assembly to move, causing the sand-adding hopper and the sand-shooting vent seat to move between a first position and a second position.

[0017] Optionally, the support assembly includes a first support member and a second support member, with the sand-adding hopper disposed on the first support member and the sand-shooting vent seat disposed on the second support member.

[0018] Optionally, the first support member and the second support member are connected by a detachable connector.

[0019] Optionally, it also includes a pneumatic pressure switch, which is located in the air circuit of the sand-shooting mechanism. When the sand-shooting air seat is in the second position, the pneumatic pressure switch detects the sealing of the air circuit of the sand-shooting mechanism.

[0020] Secondly, embodiments of this disclosure provide a core-making machine, including a sand-shooting mechanism according to any of the foregoing embodiments.

[0021] The core-making machine and its sand-shooting mechanism provided in this embodiment can move between a first position and a second position. In the first position, the sand-adding hopper is connected to the sand storage cylinder of the core-making machine, and sand can be added. In the second position, the air inlet of the sand-shooting vent is connected to the venting connection seat, and the air outlet of the sand-shooting vent is connected to the sand storage cylinder, and sand can be shot. The sand-adding hopper and the sand-shooting vent are respectively connected to the sand storage cylinder. The sand-shooting vent does not need to be arranged below the sand-adding hopper, which can reduce the arrangement height of the sand-adding hopper, thereby effectively reducing the overall height of the sand-shooting mechanism and the core-making machine. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 is a schematic diagram of the sand-shooting state of the core-making machine provided in the embodiment of this disclosure;

[0024] Figure 2 is a magnified view of part A in Figure 1;

[0025] Figure 3 is one of the perspective views of the sand-adding hopper and sand-shooting vent seat of the sand-shooting mechanism provided in the embodiment of this disclosure when they are in the first position;

[0026] Figure 4 is a second perspective view of the sand-feeding hopper and sand-shooting vent seat of the sand-shooting mechanism provided in the embodiment of this disclosure when they are in the first position;

[0027] Figure 5 is a side view of the sand-feeding hopper and sand-shooting vent seat of the sand-shooting mechanism provided in the embodiment of this disclosure when they are in the first position.

[0028] Figure 6 is a side view of the sand-feeding hopper and sand-shooting vent seat of the sand-shooting mechanism provided in the embodiment of this disclosure when they are in the second position.

[0029] Icons: 100-Drive mechanism; 110-Drive assembly; 120-Support assembly; 121-First support member; 122-Second support member; 200-Sand hopper; 300-Sand shooting vent seat; 310-First connecting surface; 311-Air inlet; 320-Second connecting surface; 322-Air expansion sealing ring; 330-Sand shooting vent chamber; 340-Filter screen; 400-Ventilation connection seat; 500-Sand storage cylinder; 600-Core box; 700-Nose; 800-Air bag part; 900-Sand shooting valve. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The components of the embodiments of this disclosure described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0036] The following detailed description of some embodiments of this disclosure is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] This disclosure provides a sand-shooting mechanism, which includes a drive mechanism 100, a sand-adding hopper 200, a sand-shooting vent seat 300, and a venting connection seat 400. The sand-shooting vent seat 300 has a sand-shooting venting chamber 330, an air inlet 311, and an air outlet. The drive mechanism 100 drives the sand-adding hopper 200 and the sand-shooting vent seat 300 to move between a first position and a second position.

[0038] In the first position, the sand hopper 200 is connected to the sand storage cylinder 500 of the core-making machine;

[0039] In the second position, the air inlet 311 of the sand-shooting ventilator 330 is connected to the ventilator 400, and the air outlet of the sand-shooting ventilator 330 is connected to the sand storage cylinder 500.

[0040] When the sand adding hopper 200 and the sand shooting vent 300 move between the first position and the second position, the relative position between the sand adding hopper 200 and the sand shooting vent 300 remains fixed.

[0041] Figure 3 is one perspective view of the sand-feeding hopper 200 and sand-shooting vent seat 300 of the sand-shooting mechanism provided in the embodiment of this disclosure when they are in the first position; Figure 4 is another perspective view of the sand-feeding hopper 200 and sand-shooting vent seat 300 of the sand-shooting mechanism provided in the embodiment of this disclosure when they are in the first position; Figure 5 is a side view of the sand-feeding hopper 200 and sand-shooting vent seat 300 of the sand-shooting mechanism provided in the embodiment of this disclosure when they are in the first position. Other structures of the sand-making machine are omitted in Figures 3 to 5.

[0042] When the sand-feeding hopper 200 and sand-feeding vent seat 300 of the sand-shooting mechanism are in the first position, the sand-feeding hopper 200 is connected to the sand storage cylinder 500 of the core-making machine. At this time, the sand-feeding mechanism is in the sand-feeding state and can realize the sand-feeding function. Core sand can be added into the sand-feeding hopper 200 and then fall into the sand storage cylinder 500. The sand-feeding hopper 200 is located above the sand storage cylinder 500. The core sand added to the sand-feeding hopper 200 can come from the sand mixer or other sand supply equipment. Before entering the sand storage cylinder 500, the core sand in the sand-feeding hopper 200 can pass through the sand-feeding butterfly valve. That is, a sand-feeding butterfly valve can be installed in the sand-feeding hopper 200. This disclosure does not limit this.

[0043] Figure 1 is a schematic diagram of the sand-shooting state of the core-making machine provided in the embodiment of the present disclosure, and Figure 6 is a side view of the sand-feeding hopper 200 and the sand-shooting vent seat 300 of the sand-shooting mechanism provided in the embodiment of the present disclosure when they are in the second position.

[0044] In the core-making machine, the air reservoir 800, sand-shooting valve 900, and venting connector 400 are all fixed. When the drive mechanism 100 drives the sand-shooting venting seat 300 to the second position, the sand-shooting venting seat 300 connects with the venting connector 400, so that the air inlet 311 of the sand-shooting venting chamber 330 is connected to the venting connector 400. At the same time, the air outlet of the sand-shooting venting chamber 330 is connected to the sand storage cylinder 500, thus forming a complete air path, as shown in Figure 1. The complete air path includes the air reservoir 800, sand-shooting valve 900, venting connector 400, sand-shooting venting seat 300, and sand storage cylinder nozzle 700. After the complete air path is formed, the sand-shooting operation can begin, and the core sand in the sand storage cylinder is injected into the core box 600.

[0045] When the sand-adding hopper 200 and the sand-shooting vent 300 move between the first and second positions, their relative positions remain fixed. Therefore, the sand-shooting mechanism can repeatedly switch between sand-adding and sand-shooting states, and this switching can be achieved simply by using the drive mechanism 100, resulting in high efficiency.

[0046] The core-making machine and its sand-shooting mechanism provided in this embodiment of the invention move between a first position and a second position. In the first position, the sand-adding hopper 200 is connected to the sand storage cylinder 500 of the core-making machine, allowing sand to be added. In the second position, the air inlet 311 of the sand-shooting venting chamber 330 is connected to the venting connection seat 400, and the air outlet of the sand-shooting venting chamber 330 is connected to the sand storage cylinder 500, allowing sand to be shot. The sand-adding hopper 200 and the sand-shooting venting seat 300 are respectively connected to the sand storage cylinder 500. The sand-shooting venting seat 300 does not need to be arranged below the sand-adding hopper 200, which can reduce the arrangement height of the sand-adding hopper 200, thereby effectively reducing the overall height of the sand-shooting mechanism and the core-making machine.

[0047] Optionally, the air inlet 311 of the sand-shooting ventilation chamber 330 is located 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. The first connecting surface 310 is intersected with the moving direction of the sand-shooting ventilation seat 300 when the driving mechanism 100 drives it to move from the first position to the second position.

[0048] With the first connecting surface 310 intersecting the moving direction of the sand-shooting vent seat 300, when the sand-shooting vent seat 300 is in the second position, the driving force applied by the drive mechanism 100 to the sand-shooting vent seat 300 can act on the contact surface between the first connecting surface 310 and the vent connecting seat 400. The drive mechanism 100 can improve or ensure the sealing performance of the connection between the first connecting surface 310 and the vent connecting seat 400. In this way, the drive mechanism 100 can not only switch between the sand-adding state and the sand-shooting state of the sand-shooting mechanism, but also ensure the air circuit sealing performance in the sand-shooting state. Compared with the prior art, which requires a separate pressure-applying mechanism to ensure the sealing performance of the sand-shooting vent seat 300 and the vent connecting seat 400, this embodiment simplifies the structure and components, eliminates the separate pressure-applying mechanism, and uses the drive mechanism 100 to achieve the function of the pressure-applying mechanism in the prior art, making the structure of the core-making machine and the sand-shooting mechanism simpler.

[0049] Optionally, as shown in Figures 1 to 6, the first connecting surface 310 is perpendicular to the direction of movement of the sand-shooting vent seat 300 driven by the driving mechanism 100 from the first position to the second position. The driving force applied by the driving mechanism 100 to the sand-shooting vent seat 300 will not generate a component force when acting on the contact surface between the first connecting surface 310 and the vent connecting seat 400, which can achieve better connection sealing between the contact surface between the first connecting surface 310 and the vent connecting seat 400.

[0050] Optionally, as shown in Figures 3 and 4, the sand-shooting vent seat 300 has two first connecting surfaces 310, which are respectively located on both sides of the sand-shooting vent seat 300. Each first connecting surface 310 is connected to a venting connecting seat 400. Each first connecting surface 310 has an air inlet 311 for the sand-shooting venting chamber 330, which can increase the air intake of the sand-shooting vent seat 300 and make the sand-shooting vent seat 300 symmetrically stressed on both sides during the sand-shooting process. Especially when the drive mechanism 100 passes through a guide component, such as a guide rail, the symmetrical stress on both sides of the sand-shooting vent seat 300 can avoid asymmetrical wear caused by unilateral stress on the guide component.

[0051] Optionally, as shown in Figure 2 (a partially enlarged view of point A in Figure 1), the air outlet of the sand-shooting venting chamber 330 is located on the second connecting surface 320 of the sand-shooting venting base 300. The second connecting surface 320 is connected to the sand storage cylinder 500, and an expansion sealing ring 322 is provided on the second connecting surface 320. The second connecting surface 320 and the sand storage cylinder 500 are sealed together by the expansion sealing ring 322. One side of the expansion sealing ring 322 is opposite to the sand storage cylinder, and the other side is opposite to the sand-shooting venting chamber 330. When high-pressure gas enters the sand-shooting venting chamber 330 of the sand-shooting venting base 300, the high-pressure gas will cause the expansion sealing ring 322 to expand, thereby achieving the effect of sealing the second connecting surface 320 and the sand storage cylinder 500.

[0052] Optionally, as shown in Figures 3 to 6, the drive mechanism 100 includes a drive assembly 110 and a support assembly 120. The sand-shooting vent seat 300 and the sand-adding hopper 200 are both mounted on the support assembly 120. The drive assembly 110 drives the support assembly 120 to move, causing the sand-adding hopper 200 and the sand-shooting vent seat 300 to move between a first position and a second position. The drive assembly 110 can be a cylinder or other drive mechanism capable of linear drive. Since both the sand-shooting vent seat 300 and the sand-adding hopper 200 are mounted on the support assembly 120, the support assembly 120 ensures that the relative positions of the sand-adding hopper 200 and the sand-shooting vent seat 300 remain fixed when they move between the first and second positions.

[0053] Optionally, as shown in Figure 4, the support assembly 120 includes a first support member 121 and a second support member 122. The sand-adding hopper 200 is disposed on the first support member 121, and the sand-shooting vent seat 300 is disposed on the second support member 122. The sand-adding hopper 200 and the sand-shooting vent seat 300 are each disposed on one support member, which facilitates the independent installation of the sand-adding hopper 200 and the sand-shooting vent seat 300. The first support member 121 and the second support member 122 are then connected to keep the relative positions between the sand-adding hopper 200 and the sand-shooting vent seat 300 fixed.

[0054] Optionally, the first support member 121 and the second support member 122 are connected by a detachable connector. The connector can be disassembled or replaced. By replacing the connector, 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 vent seat 300, which facilitates the adjustment of the space required by the sand shooting mechanism and the core making machine.

[0055] Optionally, a pneumatic pressure switch is also included. This switch is located in the air path of the sand-shooting mechanism. When the sand-shooting vent seat 300 is in the second position, the pneumatic pressure switch detects the sealing performance of the air path of the sand-shooting mechanism. By using the pneumatic pressure switch to detect the sealing performance of the air path, sand-shooting operations are only performed when the sealing performance meets the standards, ensuring the safety of the sand-shooting operation. When an air-expanding sealing ring 322 is used to achieve a sealed connection between the second connecting surface 320 and the sand storage cylinder 500, the pneumatic pressure switch can also detect the sealing effect of the air-expanding sealing ring 322, promptly identifying any faults in the air-expanding sealing ring 322 for timely replacement and maintenance.

[0056] Optionally, as shown in Figure 5, a filter screen 340 is provided in the sand-shooting air chamber 330 near the air outlet. The air outlet of the sand-shooting air chamber 330 and the second surface of the sand-shooting air seat 300 are at the same or basically the same height as the bottom surface of the sand-adding hopper 200, which facilitates the replacement of the filter screen 340 from the air outlet of the sand-shooting air chamber 330. Compared with the existing structural design in which the sand-shooting air chamber 330 is located below the sand-adding hopper 200, this design can achieve the technical effect of more convenient replacement of the filter screen 340.

[0057] This disclosure provides a core-making machine, including a sand-shooting mechanism according to any of the foregoing embodiments, which can achieve the advantages of the aforementioned sand-shooting mechanism.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure. Industrial applicability

[0059] In summary, the present disclosure provides a core-making machine and its sand-shooting mechanism, which can reduce the arrangement height of the sand-adding hopper, thereby effectively reducing the overall height of the sand-shooting mechanism and the core-making machine.

Claims

A sand-shooting mechanism for a core-making machine, characterized in that, include: The system includes a drive mechanism (100), a sand-adding hopper (200), a sand-shooting vent seat (300), and a venting connection seat (400). The sand-shooting vent seat (300) is provided with a sand-shooting venting chamber (330), and the sand-shooting vent seat (300) is also provided with an air inlet (311) and an air outlet of the sand-shooting venting chamber (330). The drive mechanism (100) drives the sand-adding hopper (200) and the sand-shooting vent seat (300) to move between a first position and a second position. In the first position, the sand feeding hopper (200) is connected to the sand storage cylinder (500) of the core-making machine; In the second position, the air inlet (311) of the sand-shooting ventilation chamber (330) is connected to the ventilation connection seat (400), and the air outlet of the sand-shooting ventilation chamber (330) is connected to the sand storage cylinder (500). When the sand adding hopper (200) and the sand shooting vent (300) move between the first position and the second position, the relative position between the sand adding hopper (200) and the sand shooting vent (300) remains fixed. The sand-shooting mechanism of the core-making machine according to claim 1 is characterized in that, The air inlet (311) of the sand-shooting ventilation chamber (330) is located 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). The first connecting surface (310) is intersected with the direction of movement of the sand-shooting ventilation seat (300) when the driving mechanism (100) drives it to move from the first position to the second position. The sand-shooting mechanism of the core-making machine according to claim 2 is characterized in that, The sand-shooting vent seat (300) is provided with two first connecting surfaces (310), which are respectively located on both sides of the sand-shooting vent seat (300). Each first connecting surface (310) is connected to a vent connecting seat (400). The sand-shooting mechanism of the core-making machine according to claim 2 or 3 is characterized in that, The first connecting surface (310) is perpendicular to the direction of movement of the sand-shooting vent seat (300) driven by the driving mechanism (100) from the first position to the second position. The sand-shooting mechanism of the core-making machine according to any one of claims 1-4 is characterized in that, The air outlet of the sand-shooting ventilation chamber (330) is located 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-expansion sealing ring (322). The second connecting surface (320) and the sand storage cylinder (500) are sealed together by the air-expansion sealing ring (322). The sand-shooting mechanism of the core-making machine according to any one of claims 1-5 is characterized in that, The drive mechanism (100) includes a drive assembly (110) and a support assembly (120). The sand-shooting vent seat (300) and the sand-adding hopper (200) are both mounted on the support assembly (120). The drive assembly (110) drives the support assembly (120) to move, so that the sand-adding hopper (200) and the sand-shooting vent seat (300) move between a first position and a second position. The sand-shooting mechanism of the core-making machine according to claim 6 is characterized in that, The support assembly (120) includes a first support member (121) and a second support member (122), the sand adding hopper (200) is disposed on the first support member (121), and the sand shooting vent seat (300) is disposed on the second support member (122). The sand-shooting mechanism of the core-making machine according to claim 7 is characterized in that, The first support member (121) and the second support member (122) are connected by a detachable connector. The sand-shooting mechanism of the core-making machine according to any one of claims 1-8 is characterized in that, It also includes a pneumatic pressure switch, which is installed in the air path of the sand-shooting mechanism. When the sand-shooting air seat (300) is in the second position, the pneumatic pressure switch detects the sealing of the air path of the sand-shooting mechanism. A core-making machine, characterized in that, Includes the sand-shooting mechanism according to any one of claims 1-9.

Images