A vacuum casting device capable of continuously casting slurry

Abstract

A kind of vacuum casting device of continuous castable slurry, comprising: support platform, secondary hopper assembly being set above support platform by multiple support rods I, vacuum casting cabin being set below support platform, primary hopper assembly being set on the cover of secondary hopper assembly by multiple support rods II, and the discharge valve I is arranged at the discharge port I of primary hopper assembly;Wherein, the hatch is opened in the side of vacuum casting cabin, and the shell to be cast is placed in the cabin body of vacuum casting cabin by shell tray, the feed inlet of secondary hopper assembly is communicated with the discharge valve by flange, and the bottom of secondary hopper assembly is provided with discharge port II.The utility model discloses by setting replaceable transfer slurry primary hopper assembly on secondary hopper assembly, continuous feeding is realized, at the same time, vacuum casting cabin uses side opening hatch to cooperate with shell tray, and forklift can circulate and withdraw the product casted, and then push the shell to be cast into cabin, continuous casting is realized, and production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of solid propellant manufacturing technology, specifically relating to a vacuum casting device for continuously casting slurry. Background Technology

[0002] In the vacuum casting production field of aerospace, weaponry, and chemical industries, the design of the casting equipment directly affects production efficiency, material utilization, and product quality. Slurry mixing in the aerospace and weaponry industries is a complex process, requiring expensive and bulky equipment. Mixing and casting are typically located in separate workshops at a certain distance (for safety reasons), making direct connection to casting impossible. In existing casting equipment, the shell to be cast is usually hoisted from the top of the vacuum casting chamber, the chamber cover is closed, a casting hopper is installed on the cover, and then vacuuming and casting are performed. After each batch of products is cast, casting must be stopped, the casting hopper removed, the chamber cover opened, the product hoisted out, and a new shell hoisted in to prepare for the next casting. When the slurry in the casting hopper is depleted, casting also needs to be stopped, the hopper moved to a replenishment position, and slurry replenished. Continuous casting operations are not possible. Meanwhile, in order to adapt to the casting of multiple small products, the position of the casting hopper is often moved or a shell rotation device is set up to achieve separate casting of each shell, resulting in low production efficiency. For example, a small-diameter propellant column frame casting device disclosed in patent application number 201822255559.5 requires the bottom shell to be cast to be rotated during the casting process in order to cast multiple sets of engines. At the same time, the device uses a single casting hopper and a fixed casting module, which makes it impossible to achieve continuous casting operation and results in low production efficiency. Utility Model Content

[0003] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0004] To achieve these objectives and other advantages of the present invention, a vacuum casting device for continuous casting of slurry is provided, comprising: a support platform; a secondary hopper assembly disposed above the support platform by a plurality of support rods I; a vacuum casting chamber disposed below the support platform and internally used for installing the shell to be cast; and further comprising: a primary hopper assembly disposed on the cover of the secondary hopper assembly by a plurality of support rods II, wherein a discharge valve I is provided at the discharge port I of the primary hopper assembly.

[0005] The vacuum casting chamber has a door on one side for sealing the vacuum casting chamber. The shell to be cast is placed inside the vacuum casting chamber via a shell tray. The discharge valve is connected to the inlet of the secondary hopper assembly via a flange. The bottom of the secondary hopper assembly is provided with a discharge port II that is connected to the vacuum casting chamber. A discharge valve II is provided at the discharge port II.

[0006] Preferably, the upper surface of the primary hopper assembly is provided with a hook that cooperates with an external hoisting device.

[0007] Preferably, the hatch is slidably connected to the vacuum casting chamber via a track assembly mounted on a support platform.

[0008] Preferably, the primary hopper assembly includes: a support rod II disposed on the cover of the secondary hopper assembly, a primary hopper with a conical bottom structure disposed on the support rod II, and a mounting plate for installing a discharge valve disposed at the middle of the support rod II, located at the discharge port I of the primary hopper;

[0009] The hook is located on the upper surface of the primary hopper.

[0010] Preferably, it also includes: a monitoring module located on the top of the inner side of the vacuum casting chamber for observing the status of the discharge port II;

[0011] The monitoring module is connected to an external control terminal for communication.

[0012] This utility model has at least the following beneficial effects: by setting a replaceable primary hopper assembly for transferring slurry on the secondary hopper assembly, continuous material supply is achieved. At the same time, the vacuum casting chamber adopts a side-opening chamber door that cooperates with the shell pallet, and a forklift can cyclically remove the cast product and push it into the shell to be cast into the chamber, thereby achieving continuous casting and improving production efficiency.

[0013] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached image description:

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

[0015] Figure 2 This is a structural schematic diagram of the primary hopper assembly;

[0016] Figure 3 A schematic diagram of the monitoring module inside the vacuum casting chamber;

[0017] Figure 4 This is a schematic diagram of the structure of the secondary hopper assembly;

[0018] Figure 5 This is a cross-sectional view of the secondary hopper.

[0019] Reference numerals: 1. Support platform; 2. Support rod I; 3. Secondary hopper assembly; 31. Secondary hopper; 32. Cover; 33. Inlet; 34. Conical connector; 35. Protrusion; 37. Cavity; 38. Discharge port II; 39. Discharge valve II; 391. Camera; 392. Vacuum port; 4. Vacuum casting chamber; 5. Support rod II; 6. Primary hopper assembly; 61. Primary hopper; 62. Discharge port I; 63. Mounting plate; 64. Hook; 7. Discharge valve I; 8. Door; 9. Shell tray; 10. Shell to be cast; 11. Monitoring module. Detailed implementation method:

[0020] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description. It should be understood that terms such as "having," "comprising," and "including" as used herein do not exclude the presence or addition of one or more other elements or combinations thereof. It should be noted that in the description of the present invention, the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and 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 orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "on top" can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] like Figure 1The vacuum casting device for continuous casting of slurry shown includes: a support platform 1, a secondary hopper assembly 3 mounted above the support platform 1 by multiple support rods I2, a vacuum casting chamber 4 mounted below the support platform 1 and used to install the shell 10 to be cast, and further includes: a primary hopper assembly 6 mounted on the cover 32 of the secondary hopper assembly 3 by multiple support rods II5, wherein a discharge valve I7 is provided at the discharge port I62 of the primary hopper assembly 6;

[0022] The vacuum casting chamber 4 has a door 8 on one side for sealing the vacuum casting chamber 4. The shell to be cast 10 is placed in the vacuum casting chamber 4 via a shell tray 9. The discharge valve is connected to the inlet 33 of the secondary hopper assembly 3 via a flange. The bottom of the secondary hopper assembly 3 is provided with a discharge port II 38 connected to the vacuum casting chamber 4. A discharge valve II 39 is provided at the discharge port II 38.

[0023] Working principle:

[0024] The primary hopper assembly 6 is supported by multiple support rods II5, which place it on the cover 32 of the secondary hopper assembly 3. A discharge valve I7 is installed at the discharge port I62 of the primary hopper assembly 6, and the discharge valve I7 is connected to the inlet 33 of the secondary hopper assembly 3 via a flange. When slurry needs to be fed into the secondary hopper assembly 3, the discharge valve I7 at the discharge port I62 of the primary hopper assembly 6 is opened. Under the action of gravity and pressure difference, the slurry flows from the primary hopper assembly 6 through the discharge port I62 and the flange-connected channel into the secondary hopper assembly 3. The secondary hopper assembly 3 serves to temporarily store and buffer the slurry, allowing it to enter the vacuum casting chamber 4 more stably. The vacuum casting chamber 4 contains the shell 10 to be cast. Before casting, the vacuum casting chamber 4 is evacuated to remove air, preventing the slurry from generating bubbles or reacting with air during casting, which could affect product quality. When the discharge port II38 at the bottom of the secondary hopper assembly 3 is opened, under the combined action of gravity and pressure difference, the slurry enters the vacuum casting chamber 4 from the secondary hopper assembly 3 through the discharge port II38 and flows into the shell 10 to be cast, completing the casting process of the shell.

[0025] A door 8 is opened on one side of the casting chamber, and the shell 10 to be cast is placed in the chamber through a tray.

[0026] Before casting, the tray containing the shell is sent into the designated position inside the vacuum casting chamber 4 via a transfer device. After a set of products is cast, the vacuum in the casting chamber is broken, and the products along with the tray are quickly transported out of the casting chamber and sent to the next set of shells. The vacuum in the casting chamber is then evacuated again, and the discharge valve II39 of the discharge port II38 is opened to continue casting. This cycle is repeated until all products in this batch are cast.

[0027] The upper surface of the primary hopper assembly 6 is equipped with a hook 64 that cooperates with an external hoisting device. Through the cooperation of the external hoisting device and the hook 64, the primary hopper assembly 6 can be quickly replaced. When casting large products requiring multiple hoppers of slurry, after the primary hopper 61 is empty, the slurry discharge valve I7 is closed, and the primary hopper assembly 6 is lifted off the ground by the external hoisting device and transferred to the replenishment position. At this time, the secondary hopper 31 does not need to stop casting. By replacing the primary hopper assembly 6 with a new one filled with slurry, or by refilling the previous primary hopper assembly 6, a continuous supply is formed. This cycle continues casting until the shell is full. This avoids casting interruptions and accelerates production efficiency. The above technical solution improves the efficiency of the entire production process and meets the needs of continuous production.

[0028] In the above technical solution, the hatch 8 is slidably connected to the casting chamber via a track assembly mounted on the support platform 1. In this solution, the track assembly includes a pair of guide rails mounted on the vacuum casting chamber 4, and the hatch 8 is slidably mounted within these guide rails via a drive motor. The guide rails provide precise guidance for the movement of the hatch 8, allowing it to slide smoothly along a predetermined path during opening and closing, preventing any impact on the sealing effect due to shaking or offset, thus ensuring the vacuum stability of the vacuum casting chamber 4 during operation. The application of the drive motor greatly improves the automation level of the hatch 8 operation. Operators can easily and quickly open or close the hatch 8 simply by controlling the drive motor, eliminating the need for significant manpower and significantly improving work efficiency.

[0029] In the above technical solution, the primary hopper assembly 6 includes: a support rod II5 disposed on the cover 32 of the secondary hopper assembly 3, a primary hopper 61 with a conical bottom structure disposed on the support rod II5, and a mounting plate 63 for installing a discharge valve I7 disposed at the middle of the support rod II5 at the discharge port I62 of the primary hopper 61.

[0030] The hook 64 is located on the upper surface of the primary hopper 61. This design utilizes a conical inner wall to continuously guide the slurry towards the center, allowing it to flow to the bottom discharge port I 62 at a faster speed and in a more concentrated manner. This structural design significantly reduces slurry adhesion and residue on the hopper wall, ensuring that as much slurry as possible is delivered to the secondary hopper assembly 3 during each discharge process. This improves slurry utilization, reduces raw material waste, and also helps ensure the stability and continuity of slurry supply during casting. An installation plate 63 is installed at the position of the middle of the support rod II5 corresponding to the discharge port I62 for installing the discharge valve I7, ensuring the stability of the discharge valve I7. The hook 64 is set on the upper surface of the primary hopper 61. When it is necessary to replenish or replace the primary hopper 61, the external hoisting equipment can quickly connect to the primary hopper 61 through the hook 64 to realize the rapid replacement of the primary hopper 61. The secondary hopper assembly 3 includes: a secondary hopper 31, a cover 32 that cooperates with the secondary hopper 31, the cover 32 having a feed port 33, and a semi-circular protrusion 35 with a size smaller than the bottom of the secondary hopper 31 located on the inner side of the bottom center of the secondary hopper 31. The protrusion 35 and the inner wall of the secondary hopper 31 are connected to each other by multiple conical cavities 37 to form an integral structure. The discharge port II 38 is located at the bottom of each cavity 37. It also includes: a camera 391 mounted on the cover 32 for observing the slurry inside the hopper, and discharge valves II 39 mounted on each discharge port II 38; the discharge valves II 39 and the camera 391 are communicatively connected to an external control terminal. A conical connector 34 is mounted on the inlet 33 to cooperate with the discharge valve I 7. The conical connector 34 is connected to the discharge valve I 7 via a flange. The slurry is injected into the secondary hopper 31 through the inlet 33 on the cover 32 and the conical connector 34. Due to the large space at the top of the hopper, it can quickly accommodate a large amount of slurry, storing material for the subsequent pouring process. At this time, the slurry flows towards the bottom of the hopper under gravity. A semi-circular protrusion 35 is located on the inner side of the center of the bottom of the secondary hopper 31, and its structure guides the slurry to diffuse outwards. The slurry flows from the central protrusion 35 to multiple conical guide channels around it. The conical guide channel's shape serves a natural guiding function. As the slurry flows, its cross-sectional area gradually decreases, accelerating the slurry and allowing it to move more quickly to the bottom of the channel. Multiple guide channels are evenly distributed between the protrusion 35 and the inner wall of the hopper, uniformly distributing the slurry to each channel and ensuring simultaneous preparation for casting. The discharge port II 38 at the bottom of each guide channel corresponds to the product to be cast. Under its own gravity, the slurry, accelerated by the conical guide channel, flows rapidly out of the discharge port II 38, casting the product. Because multiple discharge ports II 38 discharge simultaneously, and the slurry maintains uniformity during distribution, it can quickly and evenly fill the product, improving casting efficiency and quality.In this invention, the semi-circular protrusion 35 and the conical guide channel structure facilitate the flow of slurry to the surrounding discharge ports II 38 under gravity, significantly reducing residual slurry and increasing slurry utilization. Simultaneously, the camera 391 transmits real-time images of the remaining slurry volume and flow status within the hopper to the control terminal. When the slurry level in the hopper body forms a certain guide channel, the control terminal sends a signal to the corresponding control valve, closing the discharge valve II 39 of the corresponding discharge port II 38. This prevents the vacuum state inside the secondary hopper 31 from being broken, while ensuring that other pouring processes at discharge ports II 38 are not disturbed, maintaining the stability of the pouring process, and completing the material-saving pouring process sequentially. It should also be noted that discharge valve I 7 and discharge valve II 39 are commonly used devices in this technical field, and their structures will not be described in detail here.

[0031] The cover 32 is equipped with a vacuum port 392 that connects to an external vacuum device. By evacuating the interior of the secondary hopper 31 into a vacuum, the resistance of air to the flow of the slurry is reduced, making the diffusion of the slurry around the semi-circular protrusion 35 and its accelerated flow in the conical guide channel smoother. In the absence of air interference, the uniformity of the slurry when it is distributed to each guide channel is greatly improved.

[0032] The above technical solution also includes a monitoring module 11 installed on the top inner side of the vacuum casting chamber 4 for observing the status of the discharge port II 38; wherein the monitoring module 11 is communicatively connected to an external control terminal. In this technical solution, the monitoring module 11 includes a camera assembly and a light source. The light source provides supplementary lighting for the camera assembly inside the vacuum casting chamber 4, because the vacuum casting chamber 4 is in a closed state during the material discharge process, and the interior is in a dark environment. Through the supplementary lighting, the camera assembly can monitor in real time whether the shell 10 to be cast has completed casting, and also provide real-time, intuitive information on the status of the discharge port II 38. When the casting of the shell 10 is completed, the control terminal sends a signal to the discharge valve II 39 at the discharge port II 38, closing the discharge valve II 39 and stopping the slurry discharge. The camera component inside the vacuum casting chamber 4 and the camera 391 on the secondary hopper 31 perform different functions. The camera component inside the vacuum casting chamber 4 monitors the casting status of the shell 10 to be cast and then controls the discharge valve II 39 to achieve the casting of the shell. The camera 391 on the secondary hopper 31 monitors whether the guide channel inside the secondary hopper 31 is exposed. Once exposed, the discharge valve II 39 is closed through the control terminal to prevent the discharge port II 38 of the secondary hopper 31 from connecting with the vacuum casting chamber 4 and thus breaking the vacuum state.

[0033] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A vacuum casting device for continuously casting slurry, comprising: A support platform, a secondary hopper assembly mounted above the support platform via multiple support rods I, and a vacuum casting chamber for installing the shell to be cast inside the support platform, characterized in that it further includes a primary hopper assembly mounted on the cover of the secondary hopper assembly via multiple support rods II, wherein a discharge valve I is provided at the discharge port I of the primary hopper assembly. The vacuum casting chamber has a door on one side for sealing the vacuum casting chamber. The shell to be cast is placed inside the vacuum casting chamber via a shell tray. The discharge valve is connected to the inlet of the secondary hopper assembly via a flange. The bottom of the secondary hopper assembly is provided with a discharge port II that is connected to the vacuum casting chamber. A discharge valve II is provided at the discharge port II.

2. The vacuum casting device for continuously castable slurry according to claim 1, characterized in that, The upper surface of the primary hopper assembly is provided with a hook that cooperates with an external hoisting device.

3. The vacuum casting device for continuously castable slurry according to claim 1, characterized in that, The hatch is slidably connected to the vacuum casting chamber via a track assembly mounted on a support platform.

4. The vacuum casting device for continuously castable slurry according to claim 2, characterized in that, The primary hopper assembly includes: a support rod II disposed on the cover of the secondary hopper assembly, a primary hopper with a conical bottom structure disposed on the support rod II, and a mounting plate for installing a discharge valve disposed at the middle of the support rod II, located at the discharge port I of the primary hopper; The hook is located on the upper surface of the primary hopper.

5. The vacuum casting device for continuously castable slurry according to claim 1, characterized in that, Also includes: A monitoring module installed on the top inside the vacuum casting chamber to observe the status of the discharge port II; The monitoring module is connected to an external control terminal for communication.

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