Special tool for vacuum pouring of gypsum mold casting

Abstract

The utility model belongs to plaster pattern investment casting technical field relates to a special tool for plaster pattern investment casting vacuum pouring, including pouring pipe, the pouring pipe is set up in inverted U type, and the top of pouring pipe is horizontal section, the centre of horizontal section is equipped with pouring basin, and the top of horizontal section of both sides of pouring basin is correspondingly provided with window, through setting up window, first, it is convenient for the size of metal liquid stream to observe when pouring, second, it is convenient for the cleaning of pouring pipe, the both ends bottom of pouring pipe is equipped with pouring mouth respectively, and the outside wall of each pouring mouth is equipped with support assembly, to guarantee device to place steadily. The device simple structure, operation and maintenance are convenient, and help to improve the pouring quality of large castings, and improve the production efficiency of small castings.

Description

Technical Field

[0001] This utility model belongs to the field of gypsum-type investment casting technology, specifically, it relates to a special tooling for vacuum casting of gypsum-type investment casting. Background Technology

[0002] Currently, gypsum-type investment casting uses vacuum casting tanks with only one pouring port, and employs a method of pouring one mold at a time. This method has the following disadvantages: First, the efficiency is relatively slow; second, for large castings, pouring molten metal from one gate can easily cause local overheating due to the large amount of molten metal used and the concentrated heat. Thick and large parts are prone to shrinkage porosity and shrinkage cavities. For thin-walled parts, the process is long, and in areas far from the pouring gate, insufficient cold shut-in may occur, affecting the quality of the casting.

[0003] Therefore, there is an urgent need to improve existing technologies. Utility Model Content

[0004] The purpose of this invention is to provide a special tooling for vacuum casting of gypsum-type investment casting, so as to improve the casting quality and efficiency of vacuum casting of gypsum-type investment casting.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A special tooling for vacuum casting of gypsum-type investment casting includes a pouring pipe, which is arranged in an inverted U-shape and has a horizontal section at the top. A pouring cup is located at the center of the horizontal section, and windows are correspondingly opened at the top of the horizontal sections on both sides of the pouring cup. The windows are provided to facilitate observation of the size of the molten metal flow during casting and to facilitate cleaning of the pouring pipe. Pour ports are located at the bottom of both ends of the pouring pipe, and each pour port has a support component on its outer wall to ensure that the device is placed stably.

[0006] Preferably, the casting pipe is a high-temperature resistant stainless steel pipe.

[0007] Preferably, the support assembly includes a plurality of support ears, which are evenly distributed circumferentially on the outer wall of the pouring gate to improve the stability of the device during use.

[0008] Preferably, each support component includes four support ears to increase the stability of the device during use.

[0009] Devices or components not specified in this utility model all adopt existing technologies in the field, such as pouring cups and support ears, and will not be described in detail here.

[0010] The working principle of this invention is as follows: When casting large castings, molten metal from the vacuum casting tank outlet is injected into the casting pipe through the central pouring cup, and then injected into the mold cavity of the large casting through the two side pouring ports. This achieves simultaneous pouring from both sides, effectively preventing molten metal from concentrating in one place and causing localized overheating that could lead to shrinkage and cracking of the casting. This ensures the forming effect of thin-walled large castings and avoids incomplete pouring due to low temperatures in areas far from the pouring port. When casting small castings, it allows for the simultaneous pouring of two molds, thereby improving production efficiency.

[0011] Compared with the prior art, the utility model has the following beneficial effects: This device has a simple structure, is easy to operate and maintain, and helps to improve the casting quality of large castings and increase the production efficiency of small castings. Attached Figure Description

[0012] The utility model will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the main structure of the present invention in an embodiment.

[0014] Figure 2 This is a top view of the present invention in the embodiment.

[0015] Figure 3 This is a bottom view of the structure of the present invention in an embodiment.

[0016] Figure 4 yes Figure 2 A schematic diagram of the AA-direction cross-section structure.

[0017] Figure 5 yes Figure 2 A schematic diagram of the BB-direction cross-section structure.

[0018] In the diagram: 1-Gating pipe, 2-Gating cup, 3-Window, 4-Support ear, 5-Gating port. Detailed Implementation

[0019] The utility model will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the utility model without inventive effort to obtain all other embodiments should be included within the protection scope of the utility model.

[0020] Example like Figures 1-5As shown, this utility model provides a special tooling for vacuum casting of gypsum-type investment casting, including a casting pipe 1. The casting pipe is arranged in an inverted U-shape, and the top of the casting pipe is a horizontal section. A pouring cup 2 is provided at the center of the horizontal section, and windows 3 are opened on the top of the horizontal sections on both sides of the pouring cup. The windows are provided for two purposes: first, to facilitate observation of the size of the molten metal flow during casting; and second, to facilitate cleaning of the casting pipe. A pouring port 5 is provided at the bottom of both ends of the casting pipe, and a support component is provided on the outer wall of each pouring port to ensure that the device is placed stably.

[0021] Specifically, the casting pipe is a high-temperature resistant stainless steel pipe with an outer diameter of 80mm. The support assembly includes four support ears 4, which are evenly distributed circumferentially on the outer wall of the casting port to improve the stability of the device during use.

[0022] The working principle of this invention is as follows: When casting large castings, molten metal from the vacuum casting tank outlet is injected into the casting pipe through the central pouring cup, and then injected into the mold cavity of the large casting through the two side pouring ports. This achieves simultaneous pouring from both sides, effectively preventing molten metal from concentrating in one place and causing localized overheating that could lead to shrinkage and cracking of the casting. This ensures the forming effect of thin-walled large castings and avoids incomplete pouring due to low temperatures in areas far from the pouring port. When casting small castings, it allows for the simultaneous pouring of two molds, thereby improving production efficiency.

[0023] The above description is merely a preferred embodiment of the present invention and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A special tooling for vacuum casting in plaster mold investment casting, comprising a pouring pipe, characterized in that: The casting pipe is arranged in an inverted U-shape, and the top of the casting pipe is a horizontal section. A pouring cup is provided at the center of the horizontal section, and windows are opened on the top of the horizontal sections on both sides of the pouring cup. A pouring port is provided at the bottom of both ends of the casting pipe, and a support component is provided on the outer wall of each pouring port.

2. A special tool for vacuum pouring of gypsum moulds for investment casting according to claim 1, characterized in that: The casting pipe is a high-temperature resistant stainless steel pipe.

3. The special tooling for vacuum casting of plaster mold investment casting according to claim 1, characterized in that: The support assembly includes several support ears, which are evenly distributed circumferentially on the outer wall of the pouring gate.

4. A special tooling for vacuum casting of plaster mold investment casting according to claim 3, characterized in that: Each support component includes four support ears.

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