Casting water glass sand mold manufacturing equipment

Abstract

This utility model discloses a sand mold manufacturing equipment for casting water glass. A molding base plate is sequentially conveyed to a coating component, a sand filling component, a compaction component, a hardening component, and a demolding component via a conveying assembly to complete the sand mold manufacturing. During the manufacturing process, the mold surface is covered with a thin film, improving the surface smoothness of the mold and thus enhancing the surface quality of the sand mold cavity, thereby improving the surface quality of the casting. The thin film also separates the sand mold from the model, significantly reducing demolding resistance. Therefore, the draft angle can be appropriately reduced, improving the dimensional accuracy of the casting. Furthermore, during demolding, issues such as scratching the cavity or localized damage to the cavity are avoided, reducing the workload of subsequent sand mold repair. Improving the surface quality of the sand mold further enhances the surface quality of the casting, while simultaneously reducing wear on the model from the sand mold, ensuring the dimensional accuracy of the model, extending the model's service life, and further improving the dimensional accuracy of the casting.

Description

Technical Field

[0001] This utility model relates to the field of sand mold manufacturing technology, and in particular, to a water glass sand manufacturing equipment. Background Technology

[0002] In the foundry industry, water glass usually refers to sodium silicate as its main component, and is an abbreviation for water-soluble sodium silicate solution. Foundry molding sand using water glass as a binder is simply called water glass sand. Water glass sand is widely used in the foundry industry due to its ease of operation, energy efficiency, environmental friendliness, and low production cost.

[0003] Water glass sand is mainly hardened by two methods: CO2 gas blowing and dehydration hardening. Dehydration hardening includes natural drying, heating, or vacuum dehydration. CO2 gas blowing hardening is characterized by its simple operation, rapid hardening, short production cycle, energy saving, no environmental pollution, and strong controllability. Dehydration hardening, on the other hand, results in high sand mold strength. Research has shown that, with a fixed amount of water glass added to the sand mold, the strength of the sand mold obtained by vacuum dehydration hardening is 5 to 10 times that of the sand mold obtained by CO2 gas blowing hardening. The hardening time of vacuum dehydration is much longer than that of CO2 gas blowing. Therefore, researchers have combined the two methods. With a relatively small amount of water glass added to the sand mold (generally 50% to 60% of the amount used in the CO2 blowing method), the sand mold is first dehydrated and hardened to a certain extent by vacuum blowing, and then CO2 gas is blown to completely harden the sand mold. This method reduces the amount of water glass used while obtaining a high-strength sand mold in a shorter time. This hardening method is called VRH (Vacuum Replacement Hardening) process.

[0004] However, in practical applications, with the continuous improvement of product quality requirements, the following problems exist in water glass sand manufactured based on existing VRH technology and corresponding manufacturing equipment, which urgently need to be solved:

[0005] 1) The surface quality of the sand mold cavity is low, which leads to the low surface quality of the casting.

[0006] 2) In order to facilitate demolding after the sand mold has hardened, a large draft angle needs to be set on the model, which results in low dimensional accuracy of the casting.

[0007] 3) There is a large friction between the sand mold and the model. During the sand mold removal process, problems such as scraping the cavity and local damage to the cavity are likely to occur, which increases the workload of repairing the sand mold later and further reduces the surface quality of the casting.

[0008] 4) Due to the large friction between the sand mold and the model, the wear on the casting model is severe. After long-term use, the dimensional accuracy of the model decreases, which further reduces the dimensional accuracy of the casting. Utility Model Content

[0009] This invention provides a casting water glass sand mold manufacturing equipment to solve the technical problems of low surface quality and low dimensional accuracy of castings made from water glass sand manufactured using existing VRH processes and corresponding manufacturing equipment.

[0010] According to one aspect of the present invention, a casting water glass sand mold manufacturing equipment is provided, including a conveying assembly, and a film-coating assembly, a sand-filling assembly, a compaction assembly, a hardening assembly, and a mold-removing assembly arranged sequentially along the conveying direction of the conveying assembly. The conveying assembly is used to convey a sand box, the film-coating assembly is used to cover the surface of the mold with a thin film, the sand-filling assembly is used to fill molding sand into the sand box to form a sand mold, the compaction assembly is used to compact the sand mold, the hardening assembly is used to harden the sand mold, and the mold-removing assembly is used to separate the sand mold from the model.

[0011] As a further improvement to the above technical solution:

[0012] Furthermore, the coating assembly includes a heated coating element for heating the film to soften it and then covering the model surface, and a vacuum element for communicating with an air passage in the model cavity to allow the film to be vacuum-adsorbed onto the model surface.

[0013] Further heating of the coating component includes a coating mounting frame, a film roll rotatably mounted on the coating mounting frame, and an electric heater mounted on the coating mounting frame and located above the conveying assembly.

[0014] The vacuum components further include a vacuum conduit for communicating with a venting channel within the model cavity and a vacuum pump communicating with the vacuum conduit.

[0015] The sand filling assembly further includes a sand supply unit for conveying sand, a mixing unit for mixing sand connected to the conveying end of the sand supply unit, and a sand conveying unit for conveying molding sand into a sand box connected to the output end of the mixing unit.

[0016] The compaction assembly further includes a compaction frame, a compaction drive unit mounted on the compaction frame for vertical lifting of the movable end, and a matrix-type compaction head connected to the movable end of the compaction drive unit for compacting the sand mold.

[0017] The further hardened components include a vacuum chamber, a sealing door installed on the vacuum chamber, a vacuum pump connected to the vacuum chamber for evacuating the vacuum, and a carbon dioxide supply unit connected to the vacuum chamber for supplying carbon dioxide gas into the vacuum chamber.

[0018] The mold-lifting assembly further includes a push rod for lifting the sand mold frame upward, a lifting drive connected to the push rod at its movable end for driving the push rod to move vertically, and a guide mechanism arranged parallel to the push rod for horizontally limiting the push rod and guiding its movement.

[0019] The top members further include multiple top members arranged in a rectangular array and top plates connected to the multiple top members respectively.

[0020] The further conveying components include a conveying track, multiple conveying rollers spaced apart along the length of the conveying pipe, and a conveying drive unit whose movable end is connected to the conveying rollers.

[0021] This utility model has the following beneficial effects:

[0022] This invention relates to a sand mold manufacturing equipment for casting water glass. First, a coating assembly, a sand filling assembly, a compaction assembly, a hardening assembly, and a demolding assembly are arranged sequentially along the conveying direction of the conveying assembly. The molding base plate is conveyed sequentially into these assemblies. The coating assembly covers the mold surface with a thin film. The sand filling assembly fills the sand box with molding sand to form the sand mold. The compaction assembly compacts the sand mold. The hardening assembly hardens the sand mold. The demolding assembly separates the sand mold from the mold, completing the sand mold manufacturing process. During this process, the mold surface is covered with a thin film, improving the surface finish of the mold and thus the surface quality of the sand mold cavity, thereby improving the surface quality of the casting. Furthermore, the thin film helps to separate the sand mold from the mold. The mold separation significantly reduces demolding resistance, allowing for a moderate reduction in draft angle and improved dimensional accuracy of the casting. Furthermore, it avoids issues like scratching the mold cavity or causing localized damage during demolding, reducing the workload of later mold repair. Improving the surface quality of the sand mold further enhances the surface quality of the casting, while also reducing wear on the model, ensuring model dimensional accuracy, extending model lifespan, and further improving casting dimensional accuracy. Compared to existing technologies, this solution utilizes a collaborative process involving a coating component, sand filling component, compaction component, hardening component, demolding component, sand box, and model to manufacture the sand mold. Compared to existing technologies, sand castings produced using this solution exhibit higher surface quality, higher dimensional accuracy, and greater practicality, making it suitable for widespread promotion and application.

[0023] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the casting water glass sand mold manufacturing equipment according to a preferred embodiment of the present invention;

[0026] Figure 2 This is a partial structural schematic diagram of the casting water glass sand mold manufacturing equipment according to a preferred embodiment of the present invention.

[0027] Legend:

[0028] 10. Conveying assembly; 20. Coating assembly; 21. Coating mounting frame; 22. Film roll; 23. Electric heater; 24. Vacuum pipe; 30. Sand filling assembly; 40. Compaction assembly; 41. Compaction frame; 42. Compaction drive; 43. Matrix press head; 50. Hardening assembly; 60. Model; 70. Sand box. Detailed Implementation

[0029] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0030] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not restrictive. For example, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” used herein may also include the plural forms. When used in this specification, the terms “comprising,” “including,” and / or “containing” mean that the associated integers, steps, operations, elements, and / or components are present, but do not exclude the presence of one or more other features, integers, steps, operations, elements, components, and / or groups, or that other features, integers, steps, operations, elements, components, and / or groups may be added to the system / method.

[0031] Considering the following description, these and other features of this specification, as well as the operation and function of the related components of the structure, and the economy of assembly and manufacture of the parts, can be significantly improved. All of these form part of this specification with reference to the accompanying drawings. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0032] like Figure 1 As shown, the casting water glass sand mold manufacturing equipment of this embodiment includes a conveying assembly 10, and a film-coating assembly 20, a sand-filling assembly 30, a compaction assembly 40, a hardening assembly 50, and a mold-removing assembly arranged sequentially along the conveying direction of the conveying assembly 10. The conveying assembly 10 is used to convey the molding base plate, the film-coating assembly is used to cover the surface of the mold 60 with a thin film, the sand-filling assembly 30 is used to fill the sand box 70 with molding sand to form a sand mold, the compaction assembly 40 is used to compact the sand mold, the hardening assembly 50 is used to harden the sand mold, and the mold-removing assembly (not shown) is used to separate the sand mold from the mold 60.

[0033] like Figure 1 As shown, specifically, the casting water glass sand mold manufacturing equipment of this utility model first arranges a film-coating component 20, a sand-filling component 30, a compaction component 40, a hardening component 50, and a mold-removing component sequentially along the conveying direction of the conveying component 10. The molding base plate is sequentially conveyed into the film-coating component 20, the sand-filling component 30, the compaction component 40, the hardening component 50, and the mold-removing component via the conveying component 10. The film-coating component 20 covers the surface of the mold 60 with a thin film. The sand-filling component 30 fills the sand box 70 with molding sand to form a sand mold. The compaction component 40 compacts the sand mold. The hardening component 50 hardens the sand mold. The mold-removing component separates the sand mold from the mold 60, thus completing the sand mold manufacturing process. Furthermore, during the above manufacturing process, the surface of the mold 60 is covered with a thin film, improving the surface smoothness of the mold 60 and thus improving the surface quality of the sand mold cavity, thereby improving the quality of the casting. The surface quality is improved, and the thin film separates the sand mold and model 60, significantly reducing demolding resistance. Therefore, the draft angle can be appropriately reduced, improving the dimensional accuracy of the casting. Furthermore, during demolding, issues such as scratching the cavity or localized cavity damage are avoided, reducing the workload of later sand mold repair. Improving the surface quality of the sand mold further enhances the surface quality of the casting, while reducing wear on the model 60, ensuring the dimensional accuracy of the model 60, extending its service life, and further improving the dimensional accuracy of the casting. Compared to existing technologies, this solution utilizes the collaborative operation of the coating component 20, sand filling component 30, compaction component 40, hardening component 50, demolding component, sand box 70, and model 60 to manufacture the sand mold. Compared to existing technologies, the sand casting produced using this solution exhibits high surface quality, high dimensional accuracy, and strong practicality, making it suitable for widespread promotion and application.

[0034] It should be understood that the model 60 is placed on the modeling base plate, and the sand box 70 is placed on the modeling base plate and covered on the model 60. That is, when inside the film-coating component 20, the sand box 70 is not placed on the modeling template.

[0035] like Figure 2As shown, in this embodiment, the coating assembly 20 includes a heating coating component for heating the film until it softens and then covering the surface of the model 60, and a vacuum component for communicating with the air passage inside the model 60 to allow the film to be vacuum-adsorbed onto the surface of the model 60. Specifically, during coating, the film is heated to soften by the heating coating component, and then the film is fed to cover the surface of the model 60. Then, the vacuum component creates a vacuum hole in the cavity of the model 60 to maintain a vacuum inside the film cavity, so that the film is uniformly and tightly adhered to the surface of the model 60 under vacuum adsorption.

[0036] like Figure 2 As shown, in this embodiment, the heated coating component includes a coating mounting frame 21, a film roll 22 rotatably mounted on the coating mounting frame 21, and an electric heater 23 mounted on the coating mounting frame 21 and located above the conveying assembly 10. Specifically, during coating, the film is pulled below the electric heater 23 so that after the electric heater 23 is energized, the film is heated and softened, causing the film to fall and cover the surface of the mold 60. This improves the surface quality of the sand mold and thus the surface quality of the casting. Optionally, the heated coating component also includes a tension adjustment mechanism to control the unwinding tension of the film and prevent wrinkles or tears. Optionally, the heated coating component also includes a temperature sensor to monitor the heating temperature of the electric heater 23 in real time and adjust the heating temperature of the electric heater 23 to prevent overheating and burning of the film or insufficient temperature leading to poor coating. Optionally, the heated coating component also includes a coating device, which moves along the film on the model 60 after the film falls and covers the surface of the model 60, so that the heated film bonds with the micro-uneven structure of the model 60 surface under pressure to form a tight coating layer. Optionally, the heated coating component also includes a cooling fan to accelerate the cooling and setting of the film after it covers the surface of the model 60.

[0037] like Figure 2 As shown, in this embodiment, the vacuum component includes a vacuum pipe 24 for communicating with the venting channel of the inner cavity of the model 60 and a vacuum pump (not shown) communicating with the vacuum pipe 24. Specifically, the vacuum pump operates to extract air from the venting channel of the inner cavity of the model 60 through the vacuum pipe 24, thereby maintaining a vacuum in the inner cavity of the model 60 and causing the film to adhere uniformly and tightly to the surface of the model 60 under vacuum adsorption.

[0038] In this embodiment, the sand filling assembly 30 includes a sand supply component for conveying sand, a mixing component connected to the conveying end of the sand supply component for mixing sand, and a molding sand conveying component connected to the output end of the mixing component for conveying molding sand into the sand box 70. Specifically, the sand is conveyed to the mixing component through the sand supply component, where it is mixed with water glass and ester curing agent, and then conveyed to the sand mold conveying component, and then conveyed into the sand box 70 through the sand mold conveying component. Through the coordinated operation of the above components, continuous conveying of the sand mold is achieved to match the rapid hardening characteristics of water glass sand and avoid strength decay during sand storage. Optionally, the sand supply component is a vibrating feeder. Optionally, the mixing component includes a mixing tank, mixing blades arranged in the mixing tank, and a mixing drive component for driving the mixing blades to rotate. Optionally, the mixing drive component is a combination of a motor and a reducer. Optionally, the molding sand conveying component is a conveyor belt. Optionally, the mixing component also includes a dual-liquid additive component, through which water glass and ester curing agent are added to the mixing tank.

[0039] like Figure 1 As shown, in this embodiment, the compaction assembly 40 includes a compaction frame 41, a compaction drive 42 mounted on the compaction frame 41 for vertical lifting of its movable end, and a matrix-type pressure head 43 connected to the movable end of the compaction drive 42 for compacting the sand mold. Specifically, the matrix-type pressure head 43 is driven to lift vertically by the compaction drive 42 to compact the sand mold in the sand box 70. Optionally, the compaction drive 42 is a hydraulic cylinder. Optionally, the compaction end of the matrix-type pressure head 43 is provided with multiple contacts arranged in a matrix and a return spring arranged inside the matrix-type pressure head 43 and connected to the contacts. The oil chambers of each contact are interconnected. During the compaction process, the contacts automatically extend and retract according to the height of the pattern. The return spring force is used to automatically adjust the height of the contacts according to the pattern contour during the compaction process. The interconnected oil chamber design automatically balances the pressure at each point to improve the dimensional accuracy of the sand mold after compaction, thereby improving the dimensional accuracy of the casting.

[0040] In this embodiment, the hardening component 50 includes a vacuum chamber, a sealing door installed on the vacuum chamber, a second vacuum pump connected to the vacuum chamber for evacuating the vacuum, and a carbon dioxide supply device connected to the vacuum chamber for supplying carbon dioxide gas into the vacuum chamber. Specifically, by opening the sealing door, the sand box 70 is moved into the vacuum chamber, and then the sealing door is closed to allow the second vacuum pump to remove moisture from the sand mold, thus initially hardening the sand mold. Then, the second vacuum pump is turned off, and the carbon dioxide supply device supplies carbon dioxide gas into the vacuum chamber, allowing the carbon dioxide gas to rapidly diffuse into the pores of the sand mold under negative pressure, reacting with water glass to form a silica gel film that binds the sand particles, thereby completely hardening the sand mold. Finally, the carbon dioxide supply device is turned off, and the second vacuum pump is used to evacuate and remove residual carbon dioxide gas, thereby significantly reducing the amount of water glass used while ensuring the hardening strength. Optionally, the carbon dioxide supply component includes a storage tank, a vaporization chamber, a resistance wire, and a second temperature sensor. Liquid carbon dioxide is stored in the storage tank, and the vaporization chamber converts the liquid carbon dioxide into gas. The resistance wire heats the gas to a set temperature to ensure a constant hardening temperature. The second temperature sensor monitors the temperature of the gas in real time to adjust the heating temperature of the resistance wire. Optionally, the set temperature is 40±2℃, which is the optimal reaction temperature for water glass.

[0041] In this embodiment, the mold-lifting assembly includes a lifting rod for lifting the sand mold frame upwards, a lifting drive connected to the lifting rod at its movable end for driving the lifting rod to move vertically, and a guide mechanism arranged parallel to the lifting rod for horizontally limiting the lifting rod and guiding its movement. Specifically, the lifting drive drives the lifting rod to move vertically, causing the sand box 70 to separate from the mold 60, thereby achieving sand mold demolding. During the mold-lifting process, the lifting rod acts on the sand mold frame rather than directly contacting the sand mold, avoiding the risk of puncture. The guide mechanism horizontally limits the lifting rod to guide its movement, ensuring no lateral force during the mold-lifting process and reducing sand mold cracks or collapse. Optionally, the lifting drive is a hydraulic cylinder or a pneumatic cylinder, used to provide lifting power.

[0042] In this embodiment, the top rod component includes multiple top rods arranged in a rectangular array and a top plate connected to each of the multiple top rods. Specifically, the multiple top rods arranged in a rectangular array abut against the four corners of the sand box 70 frame, and the rigid plate connecting all the top rods through the top plate ensures uniform force distribution during lifting and avoids tilting. Optionally, the guiding mechanism consists of multiple vertically arranged guide rods that penetrate the top plate to ensure vertical movement of the top rods and prevent sand mold misalignment and deformation.

[0043] In this embodiment, the conveying assembly 10 includes a conveying track, multiple conveying rollers spaced apart along the length of the conveying pipe, and a conveying drive component whose movable end is connected to the conveying rollers. Specifically, the conveying drive component drives the conveying rollers to rotate, causing the sand mold to move along the conveying track and sequentially pass through the coating assembly 20, sand filling assembly 30, compaction assembly 40, hardening assembly 50, and demolding assembly, thereby completing the actions of coating, sand filling, compaction, hardening, and demolding to produce a sand mold. Optionally, the conveying drive component is a combination of a motor and a reducer. Optionally, the conveying rollers and the conveying drive component are arranged in a one-to-one correspondence.

[0044] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0045] In summary, after reading the detailed disclosure of this specification, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this specification requires various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this specification and are within the spirit and scope of the exemplary embodiments described herein.

[0046] Furthermore, certain terms in this specification have been used to describe embodiments of this specification. For example, "an embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this specification. Therefore, it is to be emphasized and understood that two or more references to "an embodiment" or "an embodiment" or "alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. Moreover, specific features, structures, or characteristics may be suitably combined in one or more embodiments of this specification.

[0047] It should be understood that in the foregoing description of the embodiments in this specification, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the description and aiding in the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this specification. That is, the embodiments in this specification can also be understood as an integration of multiple secondary embodiments. It is also valid when each secondary embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0048] Each patent, patent application, publication of the patent application, and other materials such as articles, books, specifications, publications, documents, articles, etc., cited herein may be incorporated by reference. The entire contents used for all purposes, except for any history of prosecution documents associated with it, that may be inconsistent with or conflict with this document, or that may have a limiting effect on the widest extent of the claims, are now or hereafter associated with this document. For example, in the event of any inconsistency or conflict between the description, definition, and / or use of terms associated with any of the included materials and the terms, description, definition, and / or used in connection with this document, the terms used herein shall prevail.

[0049] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments described in this specification. Other modified embodiments are also within the scope of this specification. Therefore, the embodiments disclosed in this specification are merely examples and not limitations. Those skilled in the art can implement the applications described in this specification using alternative configurations based on the embodiments in this specification. Therefore, the embodiments in this specification are not limited to the embodiments precisely described in the applications.

Claims

1. A foundry sodium silicate sand mold manufacturing apparatus characterized by comprising: It includes a conveying assembly (10), and a film-coating assembly (20), a sand-filling assembly (30), a compaction assembly (40), a hardening assembly (50), and a demolding assembly arranged sequentially along the conveying direction of the conveying assembly (10). The conveying assembly (10) is used to convey the molding base plate, the film-coating assembly is used to cover the surface of the model (60) with a film, the sand-filling assembly (30) is used to fill the sand box (70) with molding sand to form a sand mold, the compaction assembly (40) is used to compact the sand mold, the hardening assembly (50) is used to harden the sand mold, and the demolding assembly is used to separate the sand mold from the model (60).

2. The foundry sodium silicate sand mold manufacturing apparatus according to claim 1, characterized by, The coating assembly (20) includes a heated coating element for heating the film to soften it and then covering the surface of the model (60), and a vacuum element for communicating with an air passage in the cavity of the model (60) to allow the film to be vacuum-adsorbed onto the surface of the model (60).

3. The foundry sodium silicate sand mold manufacturing apparatus according to claim 2, characterized by, The heated coating component includes a coating mounting frame (21), a film roll (22) rotatably mounted on the coating mounting frame (21), and an electric heater (23) mounted on the coating mounting frame (21) and located above the conveying assembly (10).

4. The foundry sodium silicate sand mold manufacturing apparatus according to claim 2, characterized by, The vacuum component includes a vacuum pipe (24) for communicating with a vent in the cavity of the model (60) and a vacuum pump communicating with the vacuum pipe (24).

5. The foundry sodium silicate sand mold manufacturing apparatus according to any one of claims 1 to 4, characterized by, The sand filling assembly (30) includes a sand supply unit for conveying sand, a mixing unit for mixing sand connected to the conveying end of the sand supply unit, and a sand conveying unit for conveying molding sand into the sand box (70) connected to the output end of the mixing unit.

6. The equipment for manufacturing casting water glass sand molds according to any one of claims 1-4, characterized in that, The compaction assembly (40) includes a compaction frame (41), a compaction drive (42) mounted on the compaction frame (41) for vertical lifting of the movable end, and a matrix compaction head (43) connected to the movable end of the compaction drive (42) for compacting the sand mold.

7. The foundry sodium silicate sand mold manufacturing apparatus according to any one of claims 1 to 4, characterized by, The hardening component (50) includes a vacuum chamber, a sealing door installed on the vacuum chamber, a vacuum pump connected to the vacuum chamber for evacuating a vacuum, and a carbon dioxide supply unit connected to the vacuum chamber for supplying carbon dioxide gas into the vacuum chamber.

8. The foundry sodium silicate sand mold manufacturing apparatus according to any one of claims 1 to 4, characterized by, The mold-lifting assembly includes a push rod for lifting the sand mold frame upwards, a lifting drive connected to the push rod at its movable end for driving the push rod to move vertically, and a guide mechanism arranged parallel to the push rod for horizontally limiting the push rod and guiding its movement.

9. The foundry sodium silicate sand mold manufacturing apparatus according to claim 8, characterized by, The top rods include multiple top rods arranged in a rectangular array and top plates that are connected to the multiple top rods respectively.

10. The equipment for manufacturing casting water glass sand molds according to any one of claims 1-4, characterized in that, The conveying assembly (10) includes a conveying track, a plurality of conveying rollers spaced apart along the length of the conveying pipe, and a conveying drive unit whose movable end is connected to the conveying rollers.

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