Pouring device for full-mold casting of small parts in evanescent mode

Abstract

The utility model relates to an evanescent mode full-mold casting small part pouring device which comprises a top pouring straight pouring gate, a main transverse pouring gate, an auxiliary transverse pouring gate and a filter. The two sides of the top pouring sprue are connected with main cross gates respectively, one side of each main cross gate is connected with a flow guide channel, each flow guide channel is connected with one end of a filter, the other end of the filter is connected with an auxiliary cross gate, and a gap is reserved between the auxiliary cross gate and the horizontal plane; and a plurality of small parts and corresponding flow gates are arranged at the bottom end of the other end of the auxiliary cross gate, so that the effect of intensively filtering the small parts is realized, and the cost is reduced while the quality is ensured. The inner pouring gate is arranged at the bottom end of the other end of the auxiliary cross gate, top pouring is achieved, and the filter between the flow guide channel and the auxiliary cross gate is matched, so that the temperature of upper-layer molten iron of a small piece is increased while molten metal is filtered, the gasification quality of the top of the small piece is guaranteed, the molten metal of the small piece is well filtered and purified, and the service life of the small piece is prolonged. And the internal quality of small parts is greatly improved.

Description

Technical Field

[0001] This utility model relates to a filtration device, and more particularly to a casting device for small parts in lost foam casting. Background Technology

[0002] Casting is a process in which solid metal is melted into a liquid state and poured into a mold of a specific shape, where it is allowed to solidify and take shape. In the process of lost foam casting, the molten metal enters the casting through the pouring cup, sprue, sprue, and ingate. A filter is placed between the sprue and the ingate to prevent inclusions from entering the casting. The use of a filter is essential to ensure the quality of the casting.

[0003] The existing lost foam casting process for small parts previously used the bottom pouring process. In the bottom pouring process, the number of ingates required was calculated based on the actual weight of the casting and the flow rate of molten metal at each ingate. Each ingate was equipped with a filter. However, for small parts, some of which are very small, with castings weighing only tens of kilograms, a filtration system with a filtration capacity of several hundred kilograms is too small. Using one filter for each small part increases production costs and affects the company's economic benefits. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a casting device for small parts in lost foam casting.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a casting and filtering device for small parts in lost foam casting, including a top pouring sprue, a main horizontal sprue, an auxiliary horizontal sprue and a filter;

[0006] The top-injection straight gating channel is connected to the main horizontal gating channel on both sides. Each main horizontal gating channel is connected to a flow guide channel on one side. Each flow guide channel is connected to one end of a filter. The other end of the filter is connected to an auxiliary horizontal gating channel. The auxiliary horizontal gating channel is spaced apart from the horizontal plane. An inlet is provided at the bottom of the other end of the auxiliary horizontal gating channel.

[0007] The filter includes two fixed blocks and a filter plate disposed between the two fixed blocks.

[0008] In a preferred embodiment of this utility model, the filter sheet is a mullite ceramic filter sheet, and the fixing block and the flow guiding channel are both made of high temperature resistant materials.

[0009] In a preferred embodiment of the present invention, a sealing ring is further provided between the fixing block and the filter sheet, and the joint between the fixing block and the sealing ring, and the joint between the sealing ring and the filter sheet are all sealed with tape.

[0010] In a preferred embodiment of this utility model, a mounting bracket is provided between the main horizontal runner and the filter; the mounting bracket includes two fixed connecting plates and one movable connecting plate, the two fixed connecting plates are respectively connected to the main horizontal runner, and a gap is left between the two fixed connecting plates, each fixed connecting plate is provided with a connecting hole, and the two ends of the movable connecting plate are also provided with connecting holes, and the two ends of the movable connecting plate are respectively connected to the two fixed connecting plates.

[0011] In a preferred embodiment of this utility model, the movable connecting plate is provided with an elastic pad on the side facing the filter.

[0012] In a preferred embodiment of the present invention, a protective cover is provided on one end of the auxiliary horizontal runner with an inner gate.

[0013] In a preferred embodiment of this utility model, the protective cover is a high-temperature resistant steel cover or a ceramic cover.

[0014] The beneficial effects of this utility model are as follows: A gap is left between the auxiliary horizontal runner and the horizontal plane; an ingate or multiple small parts are provided at the bottom of the other end of the auxiliary horizontal runner; that is, multiple small parts and corresponding ingates can be placed at the other end of the auxiliary horizontal runner, achieving the effect of centralized filtration of multiple small parts, ensuring quality while reducing costs. Furthermore, the ingate at the bottom of the other end of the auxiliary horizontal runner enables top pouring, and in conjunction with the filter between the guide channel and the auxiliary horizontal runner, it achieves filtration of the molten metal while increasing the temperature of the upper layer of molten iron in the small parts, ensuring the vaporization quality at the top of the small parts. The molten metal in the small parts is well filtered and purified, greatly improving the internal quality of the small parts and increasing the economic benefits of the enterprise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the filter structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the mounting bracket structure of this utility model;

[0019] In the diagram: 1. Top sprue; 2. Main runner; 3. Auxiliary runner; 4. Filter; 401. Fixing block; 402. Filter plate; 403. Sealing ring; 5. Guide channel; 6. Ingate; 7. Mounting bracket; 701. Fixed connecting plate; 702. Movable connecting plate; 703. Elastic pad; 8. Connecting hole; 9. Protective cover. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] like Figures 1 to 4 The following is a lost foam casting device for small parts, including a top sprue 1, a main runner 2, an auxiliary runner 3, and a filter 4;

[0023] The top-injection sprue 1 is connected to the main horizontal runners 2 on both sides. Each of the main horizontal runners 2 is connected to a guide channel 5 on one side. In this application, the main horizontal runners 2 and the guide channels 5 are arranged vertically. Each guide channel 5 is connected to one end of a filter 4. The other end of the filter 4 is connected to an auxiliary horizontal runner 3. The auxiliary horizontal runner 3 is spaced from the horizontal plane. The bottom of the other end of the auxiliary horizontal runner 3 is provided with an ingate 6 or multiple small parts.

[0024] The filter 4 includes two fixed blocks 401 and a filter plate 402 disposed between the two fixed blocks 401.

[0025] In this invention, the casting device guides the molten metal through the top-poured straight gating channel 1 and the main horizontal gating channel 2. Since the main horizontal gating channel 2 and the filter 4 are connected by a guide channel 5, and are vertically aligned, the molten metal is smoothly guided into the filter 4. This reduces the eddy currents in the molten metal during casting, ensuring uniform flow, reducing the impact and turbulence when the liquid enters the filter 4, minimizing gas entrainment, lowering the risk of direct impact from the molten metal, and extending the filter's lifespan. The auxiliary horizontal gating channel 3 has a gap between itself and the horizontal plane; an ingate 6 or multiple small components are located at the bottom of the other end of the auxiliary horizontal gating channel 3. This allows multiple small components and corresponding ingates to be placed at the other end of the auxiliary horizontal gating channel 3, achieving centralized filtration of multiple small components, ensuring quality while reducing costs. Furthermore, a gap is left between the auxiliary horizontal sprue 3 and the horizontal plane. An inner gate 6 or multiple small parts are provided at the bottom of the other end of the auxiliary horizontal sprue 3, which realizes top pouring and solves the problem of small parts with different heights and inconvenient connection. In addition, with the filter 4 between the guide channel 5 and the auxiliary horizontal sprue 3, the molten metal is filtered while the temperature of the upper layer of molten iron in the small parts is increased, ensuring the vaporization quality of the top of the small parts. The molten metal in the small parts is well filtered and purified, which greatly improves the internal quality of the small parts.

[0026] In a preferred embodiment, the filter element 402 in this application is a mullite ceramic filter element, and both the fixing block 401 and the flow guiding channel 5 are made of high-temperature resistant materials. The fixing block 401 provides a stable installation position for the filter element 402, ensuring that the filter element will not move or fall off during the casting process, preventing the molten metal from directly impacting the filter element, improving the service life of the filter, preventing molten metal from leaking from around the filter, and ensuring that all molten metal passes through the filter element.

[0027] In a preferred embodiment, a sealing ring 403 is further provided between the fixing block 401 and the filter element 402. The joints between the fixing block 401 and the sealing ring 403, and between the sealing ring 403 and the filter element 402, are sealed with adhesive tape. The sealing ring 403 prevents molten metal from leaking from the gap between the filter element and the fixing block, ensuring that all molten metal passes through the filter element. Furthermore, the sealing ring provides cushioning when the filter is impacted by molten metal, preventing damage or displacement of the filter due to vibration, reducing direct friction between the filter element and the fixing block, and protecting the integrity of both.

[0028] In a preferred embodiment, a mounting bracket 7 is provided between the main horizontal runner 2 and the filter 4. The mounting bracket 7 in this application includes two fixed connecting plates 701 and one movable connecting plate 702. The two fixed connecting plates 701 are respectively connected to the main horizontal runner 2, and a gap is left between the two fixed connecting plates 701. Each fixed connecting plate 701 is provided with a connecting hole 8. The movable connecting plate 702 also has connecting holes 8 at both ends, and both ends of the movable connecting plate 702 are respectively connected to the two fixed connecting plates 701. The mounting bracket 7 achieves the connection between the filter 4 and the main horizontal runner 2. The mounting bracket 7 in this application is made of steel or cast iron to ensure that the filter will not shift during the casting process, guaranteeing the stability of the filter during use. Furthermore, the connecting holes 8 of the movable connecting plate 702 at different positions on the fixed connecting plate 701 can be adjusted according to the model and size of the filter, improving the adaptability of the mounting bracket 7 in fixing the filter 4.

[0029] In a preferred embodiment, the movable connecting plate 702 in this application is provided with an elastic pad 703 on the side facing the filter. The elastic pad 703 provides buffering between the filter and the movable connecting plate 702, reduces direct friction between the filter 4 and the movable connecting plate 702, protects the integrity of both, and extends their service life.

[0030] In a preferred embodiment, the auxiliary horizontal runner with an inner gate in this application is provided with a protective cover 9 at one end. The protective cover 9 is made of high-temperature resistant steel or ceramic. The protective cover 9 helps to prevent external debris, such as dust or sand particles, from falling into the gating system and entering the molten metal, thus ensuring the product quality of the cast small parts.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A casting device for small parts in lost foam casting, characterized in that, It includes a top-injection sprue (1), a main horizontal sprue (2), an auxiliary horizontal sprue (3), and a filter (4); The top-injection straight gating (1) is connected to the main horizontal gating (2) on both sides. Each of the main horizontal gating (2) is connected to a guide channel (5) on one side. Each guide channel (5) is connected to one end of a filter (4). The other end of the filter (4) is connected to an auxiliary horizontal gating (3). The auxiliary horizontal gating (3) is spaced from the horizontal plane. An inlet (6) is provided at the bottom of the other end of the auxiliary horizontal gating (3). The filter (4) includes two fixed blocks (401) and a filter plate (402) disposed between the two fixed blocks (401).

2. The lost foam casting device for small parts according to claim 1, characterized in that, The filter (402) is a mullite ceramic filter, and the fixing block (401) and the flow channel (5) are both made of high-temperature resistant materials.

3. The lost foam casting device for small parts according to claim 1, characterized in that, A sealing ring (403) is also provided between the fixing block (401) and the filter (402). The joints of the fixing block (401) and the sealing ring (403), and the joints of the sealing ring (403) and the filter (402) are all sealed with tape.

4. The lost foam casting device for small parts according to claim 1, characterized in that, A mounting bracket (7) is provided between the main horizontal runner (2) and the filter (4); the mounting bracket (7) includes two fixed connecting plates (701) and one movable connecting plate (702). The two fixed connecting plates (701) are respectively connected to the main horizontal runner (2), and there is a gap between the two fixed connecting plates (701). Each fixed connecting plate (701) is provided with a connecting hole (8). The two ends of the movable connecting plate (702) are also provided with connecting holes (8), and the two ends of the movable connecting plate (702) are respectively connected to the two fixed connecting plates (701).

5. The lost foam casting device for small parts according to claim 4, characterized in that, The movable connecting plate (702) is provided with an elastic pad (703) on the side facing the filter.

6. The lost foam casting device for small parts according to claim 1, characterized in that, A protective cover (9) is provided on one end of the auxiliary horizontal runner with an ingate.

7. The lost foam casting device for small parts according to claim 6, characterized in that, The protective cover (9) is a high-temperature resistant steel cover or a ceramic cover.

Images