Sand shooting mechanism for molding machine

Abstract

The utility model discloses a sand shooting mechanism for a molding machine, which comprises a middle box body, a sand shooting assembly and a sealing assembly, the sealing assembly is fixedly arranged at the top of the middle box body through a bolt, and the bottom of the middle box body is fixedly connected with the sand shooting assembly through a bolt; more than two boiling plates for guiding high-pressure gas are arranged on the inner side wall of the middle box body, more than two support frames are welded on the outer side wall of the middle box body, a cabin door is arranged on one side of the middle box body, one side of the cabin door is movably connected with the middle box body through a hinge, and the cabin door is fixedly connected with the outer side wall of the middle box body through bolts. According to the sand shooting mechanism for the molding machine and the sealing assembly, the sand shooting assembly and the supporting frame of the sand shooting mechanism, the technical problem that traditional equipment is difficult to maintain is effectively solved through the design of the movably-opened cabin door, the modularized sealing assembly and the mounting structure of the sand shooting assembly and the optimized layout of the supporting frame and the boiling plate; the device has the advantages of being convenient to maintain and overhaul and improving equipment stability and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of molding machines, specifically to a sand-shooting mechanism for molding machines. Background Technology

[0002] The existing sand-shooting mechanism is a core functional module of molding machines in the foundry industry. Its function is to propel molding sand at high speed into the sand box cavity using a high-pressure airflow to form a compact and uniform sand mold. Traditional sand-shooting mechanisms typically consist of a sand-shooting cylinder, a pneumatic system, a sand distribution device, and a sealing structure. Their performance directly affects mold quality, production efficiency, and equipment stability. However, existing sand-shooting mechanisms generally suffer from inconvenient maintenance in their structural design. In particular, the side-enclosed design makes equipment inspection, cleaning, and component replacement difficult, becoming a key issue restricting technological upgrades in the industry.

[0003] Traditional sand-shooting mechanisms typically employ an integral shell, welded frame, or modular panel to ensure sealing and structural strength. Maintenance requires access from the top or bottom, limiting operating space. Repairing internal components such as the sand-shooting nozzles, guide plates, and air passage valves often necessitates disassembling numerous external parts, taking several hours. During sand-shooting, molding sand easily accumulates on the inner wall of the sand-shooting cylinder and at air passage interfaces. The enclosed structure makes it difficult to clean these dead zones directly, leading to uneven sand-shooting pressure, decreased mold compaction, and even equipment malfunction over time. To address these issues, there is an urgent need for an easy-to-maintain sand-shooting mechanism on the market. Utility Model Content

[0004] To address the aforementioned issues, the purpose of this application is to provide a sand-shooting mechanism for a molding machine, along with its sealing components, sand-shooting assembly, and support frame, which offers advantages such as ease of maintenance and repair, improved equipment stability, and increased production efficiency.

[0005] This application provides a sand-shooting mechanism for a molding machine, the technical solution of which is as follows: A sand-shooting mechanism for a molding machine includes a middle box, a sand-shooting assembly, and a sealing assembly. The sealing assembly is fixedly installed on the top of the middle box by bolts, and the bottom of the middle box is fixedly connected to the sand-shooting assembly by bolts. Two or more boiling plates for guiding high-pressure gas are provided on the inner side wall of the middle box, and two or more support frames are welded on the outer side wall of the middle box. A hatch is provided on one side of the middle box, and one side of the hatch is movably connected to the middle box by a hinge. The hatch is fixedly connected to the outer side wall of the middle box by bolts.

[0006] Furthermore, this application also proposes that the sealing assembly is composed of a top cover, a sand inlet nozzle, a telescopic cylinder, and a sealing plate. The sand inlet nozzle has a rectangular opening structure and is fixedly installed on the top of the top cover by bolts. The telescopic cylinder is fixedly installed on the outer wall of one side of the top cover. The sealing plate is located below the sand inlet nozzle. The telescopic cylinder can drive the sealing plate to horizontally extend and retract to open or close the sand inlet nozzle. A sealing rubber ring is provided at the bottom of the sand inlet nozzle.

[0007] Furthermore, this application also proposes that the top cover is equipped with an air intake pipe and a pressure sensor, and that two or more one-way valves for exhaust are provided on both sides of the top cover.

[0008] Furthermore, this application also proposes that the sand-shooting assembly is composed of a connecting cavity, a first sand-shooting cavity, and a second sand-shooting cavity. Boiling strips are provided around the connecting cavity. The first sand-shooting cavity and the second sand-shooting cavity are arranged side by side below the connecting cavity. The cross-sections of the first sand-shooting cavity and the second sand-shooting cavity are both inverted trapezoidal structures. The lower part of the first sand-shooting cavity and the second sand-shooting cavity are provided with sand-shooting nozzles that communicate with the sand box.

[0009] Furthermore, this application also proposes that the boiling plate and the boiling strip are each provided with a plurality of frames, and the frames are provided with a porous breathable mesh.

[0010] Furthermore, this application also proposes that the support frame is composed of a horizontal plate and wing plates, with two wing plates provided on the horizontal plate.

[0011] Furthermore, this application also proposes that the horizontal plate has a rectangular structure, the wing plate has a trapezoidal structure, the horizontal plate has fixing holes, and the wing plate has through holes.

[0012] Furthermore, this application also proposes that boiling plates are respectively provided on the front and rear sides and the left inner wall of the middle box, support frames are welded on the front and rear sides and the left outer wall of the middle box, and an air passage is provided between the upper outer side of the middle box and the support frame, and the air passage is connected to the boiling plates.

[0013] This application provides a sand-shooting mechanism for a molding machine, along with its sealing components, sand-shooting components, and support frame. Through the design of a movable and openable hatch, the modular sealing components, and the installation structure of the sand-shooting components, combined with the optimized layout of the support frame and the boiling plate, it effectively solves the technical problem of difficult maintenance of traditional equipment. It has the advantages of easy maintenance and repair, improved equipment stability, and increased production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a first sectional view of the present invention;

[0016] Figure 3 This is a second sectional view of the present invention;

[0017] Figure 4 This is a schematic diagram of the sealing assembly of this utility model;

[0018] Figure 5 This is a structural schematic diagram of the sealing component of this utility model from a bottom view. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described in detail with reference to specific embodiments. To provide a clear and complete description of the technical solution, the following embodiments are selected for illustration; other embodiments obtained based on the content described in this application without creative effort are all within the scope of protection of this utility model.

[0020] In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of clearly describing this embodiment, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] A sand-shooting mechanism for a molding machine includes a middle housing 1, a sand-shooting assembly 2, and a sealing assembly 3. The sealing assembly 3 is fixedly installed on the top of the middle housing 1 by bolts, and the bottom of the middle housing 1 is fixedly connected to the sand-shooting assembly 2 by bolts. Two or more boiling plates 4 for guiding high-pressure gas are provided on the inner side wall of the middle housing 1, and two or more support frames 5 are welded on the outer side wall of the middle housing 1. A hatch 6 is provided on one side of the middle housing 1, and one side of the hatch 6 is movably connected to the middle housing 1 by a hinge 7. The hatch 6 is fixedly connected to the outer side wall of the middle housing 1 by bolts.

[0022] Bolted installation refers to the detachable connection between components using threaded fasteners, specifically standard hexagonal bolts with nuts, facilitating quick disassembly and reassembly during equipment maintenance. The boiling plate is a flow-guiding component with a permeable structure, typically formed by welding perforated steel plates and reinforcing frames, used to guide the uniform distribution of high-pressure gas during sand-shooting. The support frame is a metal frame that bears external loads, typically formed by welding channel steel and steel plates into an L-shaped structure, used to enhance the structural strength of the inner housing and provide a reference surface for external equipment installation. This application combines a hinged connection structure with bolted fixing to form a side-opening hatch structure, providing a maintenance passage that directly exposes the internal working space while maintaining the housing's sealing performance. This design breaks through the traditional fully enclosed housing structure of sand-shooting mechanisms, enabling rapid inspection and cleaning of internal components through a side-opening hatch, effectively solving the technical problems of limited maintenance space and cumbersome disassembly procedures in existing equipment.

[0023] The working process and principle of this application are as follows: the sand-shooting mechanism includes a middle housing, a sand-shooting assembly, and a sealing assembly. The sealing assembly is fixedly installed on the top of the middle housing with bolts, and the bottom of the middle housing is fixedly connected to the sand-shooting assembly with bolts, forming a modular and detachable structure. Two or more boiling plates for guiding high-pressure gas are installed on the inner wall of the middle housing, and two or more support frames are welded to the outer wall to ensure structural strength and provide installation interfaces for external equipment. A hatch is provided on one side of the middle housing; one side of the hatch is movably connected to the middle housing via a hinge, and the other side is fixedly connected to the outer wall of the middle housing with bolts.

[0024] During operation, high-pressure gas is guided into the middle chamber through a boiling plate. The sand-shooting assembly, under the pressure of the gas, propels molding sand at high speed into the sand box cavity. The support frame provides support and stability for the overall structure. When maintenance or repair is required, the bolts connecting the hatch to the outer wall of the middle chamber can be released, allowing the hatch to open by rotating a hinge, forming a side access door. This design retains the airtightness of the enclosed structure while allowing direct exposure of the internal space through the hatch opening, facilitating the inspection and repair of internal components by operators.

[0025] The hatch uses a combination of hinged connections and bolted fastenings, which maintains the continuity of the side walls and the rigidity of the enclosure while allowing for easy opening when needed. This design avoids the cumbersome process of disassembling multiple external components required in traditional maintenance, thus improving maintenance efficiency.

[0026] In a preferred embodiment, the sealing assembly 3 is composed of a top cover 301, a sand inlet 302, a telescopic cylinder 304, and a sealing plate 303. The sand inlet 302 has a rectangular opening structure and is fixedly installed on the top of the top cover 301 by bolts. The telescopic cylinder 304 is fixedly installed on one side of the outer wall of the top cover 301. The sealing plate 303 is located below the sand inlet 302. The telescopic cylinder 304 can drive the sealing plate 303 to horizontally extend and retract, opening or closing the sand inlet 302. A sealing ring is provided at the bottom of the sand inlet 302. Through the above technical solution, this application achieves precise control and efficient exhaust of the internal air pressure of the sealing assembly. The air inlet pipe introduces controllable high-pressure gas to ensure stable internal pressure during sand injection and avoid uneven sand injection due to insufficient pressure. The pressure sensor monitors the internal air pressure of the top cover in real time, providing data feedback for gas supply adjustment and preventing excessive pressure from causing sealing ring failure or sealing plate deformation. Multiple one-way valves on both sides of the top cover promptly discharge excess gas to maintain air pressure balance and avoid gas stagnation leading to sand injection pressure fluctuations. The one-way valve's unidirectional flow prevents backflow of external impurities, ensuring system cleanliness. The synergistic effect of these technical features enhances the stability and sealing reliability of the sand-jetting process.

[0027] In a preferred embodiment, the upper cover 301 is further provided with an air inlet pipe 305 and a pressure sensor 306, and two or more one-way valves 307 for venting are provided on both sides of the upper cover 301. This application achieves precise control and efficient venting of the internal air pressure of the sealing assembly. The air inlet pipe introduces controllable high-pressure gas to ensure stable internal pressure during sand blasting and avoid uneven sand blasting caused by insufficient pressure. The pressure sensor monitors the internal air pressure of the upper cover in real time, providing data feedback for gas supply adjustment and preventing excessive pressure from causing failure of the sealing ring or deformation of the sealing plate. Multiple one-way valves on both sides of the upper cover promptly discharge excess gas, maintain air pressure balance, and avoid gas stagnation causing sand blasting pressure fluctuations. The one-way conduction characteristic of the one-way valves prevents backflow of external impurities and ensures system cleanliness. The synergistic effect of these technical features improves the stability of the sand blasting process and the reliability of the seal.

[0028] In a preferred embodiment, the sand-shooting assembly 2 is composed of a connecting cavity 201, a first sand-shooting cavity 202, and a second sand-shooting cavity 203. Boiling strips 204 are arranged around the connecting cavity 201. The first and second sand-shooting cavities 202 and 203 are arranged side-by-side below the connecting cavity 201. Both the first and second sand-shooting cavities 202 and 203 have inverted trapezoidal cross-sections. Sand-shooting nozzles 205, connecting to a sand box, are provided at the bottom of both the first and second sand-shooting cavities 202 and 203. Multiple frames are provided on both the boiling plate 4 and the boiling strips 204, and the frames are equipped with porous, breathable mesh. The combined structure of the frames and the breathable mesh enhances the overall strength of the boiling plate and boiling strips, preventing deformation under high-pressure gas. The porous, breathable mesh provides uniform gas permeation channels, improving gas distribution in the sand-shooting area. The zonal arrangement of the frames facilitates local replacement and cleaning, reducing the risk of failure of the entire boiling plate or boiling strip due to single-point damage. The porous structure of the permeable mesh effectively controls the gas flow rate, ensuring sufficient airflow pressure to maintain the fluidization of the molding sand while preventing sand particles from entering the air passage system and causing blockage. This design significantly improves the uniformity of sand injection, reduces the accumulation and blockage of molding sand on the surface of the permeable structure, thereby enhancing the overall performance and reliability of the sand injection mechanism.

[0029] In a preferred embodiment, the support frame 5 is composed of a horizontal plate 501 and two wing plates 502. The horizontal plate 501 has two wing plates 502. The horizontal plate 501 is rectangular, and the wing plates 502 are trapezoidal. The horizontal plate 501 has fixing holes, and the wing plates 502 have through holes. The rectangular horizontal plate provides a stable welding base, increases the contact area with the outer wall of the middle housing, and improves the support strength. The trapezoidal wing plates accommodate different installation angles and avoid interference with other components. The fixing holes on the horizontal plate and the through holes on the wing plates enable precise positioning, facilitating the connection between the support frame and the middle housing and external structures. This design not only enhances the external support stability of the middle housing but also improves the overall support strength, while facilitating quick positioning and adjustment during disassembly and maintenance.

[0030] In a preferred embodiment, boiling plates 4 are respectively installed on the front and rear sides and the inner left wall of the middle housing 1. Support frames 5 are welded to the front and rear sides and the outer left wall of the middle housing 1. An air passage 8 is provided between the upper outer side of the middle housing 1 and the support frame 5, and the air passage 8 communicates with the boiling plates 4. Three boiling plates are installed on the inner wall of the middle housing, located on the front, rear, and left inner walls respectively. The boiling plates are made of porous metal plates to uniformly guide high-pressure gas. Three support frames are welded to the outer wall of the middle housing, corresponding to the positions of the inner boiling plates. The support frames consist of horizontal and vertical plates, providing structural support and interfaces for external equipment installation.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sand-shooting mechanism for a molding machine, comprising a central housing, a sand-shooting assembly, and a sealing assembly, characterized in that: The sealing assembly is fixedly installed on the top of the middle housing by bolts, and the bottom of the middle housing is fixedly connected to the sand-shooting assembly by bolts. The inner wall of the middle chamber is provided with two or more boiling plates for guiding high-pressure gas. The outer wall of the middle chamber is welded with two or more support frames. A hatch is provided on one side of the middle chamber. The hatch is movably connected to the middle chamber by a hinge and is fixedly connected to the outer wall of the middle chamber by bolts.

2. The sand-shooting mechanism for a molding machine according to claim 1, characterized in that: The sealing assembly consists of a top cover, a sand inlet nozzle, a telescopic cylinder, and a sealing plate. The sand inlet nozzle has a rectangular opening structure and is fixedly installed on the top of the top cover by bolts. The telescopic cylinder is fixedly installed on the outer wall of one side of the top cover. The sealing plate is located below the sand inlet nozzle. The telescopic cylinder can drive the sealing plate to horizontally extend and retract to open or close the sand inlet nozzle. A sealing rubber ring is provided at the bottom of the sand inlet nozzle.

3. The sand-shooting mechanism for a molding machine according to claim 2, characterized in that: The top cover is also equipped with an air intake pipe and a pressure sensor, and two or more one-way valves for exhaust are also provided on both sides of the top cover.

4. The sand-shooting mechanism for a molding machine according to claim 1, characterized in that: The sand-shooting assembly is composed of a connecting cavity, a first sand-shooting cavity, and a second sand-shooting cavity. Boiling strips are provided around the connecting cavity. The first and second sand-shooting cavities are arranged side by side below the connecting cavity. The cross-sections of the first and second sand-shooting cavities are both inverted trapezoidal structures. The lower part of the first and second sand-shooting cavities is provided with sand-shooting nozzles that communicate with the sand box.

5. The sand-shooting mechanism for a molding machine according to claim 4, characterized in that: The boiling plate and boiling strip are each provided with a plurality of frames, and the frames are provided with a porous, breathable mesh.

6. The sand-shooting mechanism for a molding machine according to claim 1, characterized in that: The support frame is composed of a horizontal plate and wing plates, and two wing plates are provided on the horizontal plate.

7. The sand-shooting mechanism for a molding machine according to claim 6, characterized in that: The horizontal plate has a rectangular structure, the wing plate has a trapezoidal structure, the horizontal plate has fixing holes, and the wing plate has through holes.

8. The sand-shooting mechanism for a molding machine according to any one of claims 1-7, characterized in that: Boiling plates are respectively installed on the front and rear sides and the left inner wall of the middle box. Support frames are welded on the front and rear sides and the left outer wall of the middle box. An air passage is provided between the upper outer side of the middle box and the support frame, and the air passage is connected to the boiling plates.

Images