A new box casting mold

Abstract

The application relates to a novel box casting mold and belongs to the technical field of casting molds. The box casting mold comprises a mold plate, a mold cavity mold, a sand core and a pouring assembly. The mold plate comprises a parting surface, and the parting surface is provided with a positioning part. The mold cavity mold is arranged on the mold plate and is used for forming a mold cavity in a sand mold. The sand core is installed at an installation position formed by the mold plate, the sand core is matched with the mold cavity, the sand core is provided with a protruding structure, the protruding structure is in plug-in cooperation with the positioning part to limit horizontal movement of the sand core, and the upper end surface of the protruding structure is flush with the parting surface, so that the sand core is installed in place. The pouring assembly is installed on the sand mold, and the pouring assembly comprises a straight sprue and a conveying pipeline. One end of the conveying pipeline is connected with the straight sprue, and the other end of the conveying pipeline is connected with the mold cavity. The application has the effects of improving the installation efficiency and installation quality of the sand core.

Description

Technical Field

[0001] This application relates to the field of casting mold technology, and in particular to a novel box casting mold. Background Technology

[0002] In the casting industry, with the continuous development and progress of industry, casting technology, as one of the fundamental processes of manufacturing, is becoming increasingly important. Advanced casting technology can produce high-precision, high-strength, and consistently high-quality parts, which are widely used in many important industries such as automobiles, aerospace, and machinery manufacturing. In automobile manufacturing, high-quality castings can improve the performance and reliability of vehicles; in the aerospace field, high-precision cast parts play a crucial role in the safety and stability of aircraft; and in the machinery manufacturing industry, good castings ensure the normal operation and efficient functioning of mechanical equipment.

[0003] Currently, in the foundry industry, when installing sand cores in traditional box casting molds, workers often need to rely on their experience to judge whether the sand core is installed in place by observing the approximate positional relationship between the sand core and the mold plate.

[0004] However, in the above installation methods, the sand core installation lacks effective positioning measures. Workers find it difficult to accurately judge whether the sand core is installed in place through visual means. For example, they cannot quickly judge the levelness of the sand core and whether it fits the mold plate completely. This not only reduces installation efficiency, but may also affect the quality of the casting due to improper installation. Utility Model Content

[0005] To improve the installation efficiency and quality of sand cores, this application provides a novel box casting mold.

[0006] The novel box-type casting mold provided in this application adopts the following technical solution: A novel box-type casting mold includes: a mold plate, the mold plate including a parting surface, the parting surface having a positioning portion; a cavity mold, the cavity mold disposed on the mold plate for forming a cavity within a sand mold; a sand core, the sand core being installed at an installation position formed by the mold plate, the sand core cooperating with the cavity, the sand core having a protruding structure, the protruding structure being inserted into the positioning portion to restrict the horizontal movement of the sand core, and the upper end face of the protruding structure being flush with the parting surface to ensure the sand core is properly installed; and a gating assembly, the gating assembly being installed on the sand mold, the gating assembly including a sprue and a conveying pipe, one end of the conveying pipe being connected to the sprue, and the other end of the conveying pipe being connected to the cavity.

[0007] By adopting the above technical solution, a positioning part is provided on the parting surface of the mold plate, which interlocks with the protruding structure of the sand core. This restricts the horizontal movement of the sand core and ensures the accuracy of the sand core installation position. Simultaneously, the upper end face of the protruding structure is flush with the parting surface, allowing the sand core to be installed in place, improving installation accuracy and efficiency. The cavity mold is set on the mold plate to form a cavity within the sand core, providing molding space for casting. The gating assembly is installed on the sand mold. The sprue allows molten iron to enter the conveying pipe, which transports the molten iron from the sprue to the cavity, ensuring smooth entry of the molten iron into the cavity for casting the box body.

[0008] Optionally, the sand core is provided with a sand collection position, and the sand mold is provided with a sand collection groove. The sand collection groove is used to align and cooperate with the sand collection position to collect the sand that falls during the installation of the sand core.

[0009] By adopting the above technical solution, a sand collection position is set at the lower end of the sand core. This position is used to cooperate with the sand collection groove on the sand mold. It can collect fallen sand during the installation of the sand core, and prevent fallen sand from entering the mold cavity and affecting the quality of the casting or falling on the surface of the sand core and affecting the installation of the sand core, thereby ensuring the molding effect of the casting.

[0010] Optionally, the mold may also include a plurality of chills distributed on the cavity.

[0011] By adopting the above technical solution, several chills are distributed on the mold cavity. The chills can generate a cooling effect, accelerate the cooling rate of the molten iron, and since chills are provided in all processing areas, internal defects in the casting can be effectively eliminated, the tendency of the casting to shrink porosity can be reduced, and the quality of the casting can be improved.

[0012] Optionally, the two ends of the conveying pipe are respectively located on both sides of the mold plate.

[0013] By adopting the above technical solution, the two ends of the conveying pipe are respectively located on both sides of the mold plate, so that molten iron can enter the mold cavity from the bottom side of the mold plate for pouring, reducing interference with the surrounding components of the mold cavity, and also allowing the molten iron to fill the mold cavity more evenly, reducing casting defects caused by uneven flow of molten iron, and improving casting quality and molding effect.

[0014] Optionally, the casting assembly includes a filter connected to the delivery pipe for filtering the molten iron in the delivery pipe.

[0015] By adopting the above technical solution, the filter in the casting assembly is connected to the conveying pipe, which can filter the molten iron in the conveying pipe, effectively remove impurities from the molten iron, keep the molten iron flowing into the mold cavity clean, reduce internal defects in the casting caused by impurities, and improve the quality of the casting.

[0016] Optionally, it also includes an exhaust assembly, which includes a first exhaust group and a second exhaust group. The first exhaust group is connected to the sand core and is used to exhaust air from the sand core, and the second exhaust group is connected to the mold cavity and is used to exhaust air from the mold cavity.

[0017] By adopting the above technical solution, the first venting group is connected to the sand core, which can vent the sand core and prevent the gas in the sand core from affecting the quality of the casting; the second venting group is connected to the mold cavity, which can vent the mold cavity and prevent the gas in the mold cavity from causing defects such as porosity and shrinkage in the casting, thereby improving the quality of the casting.

[0018] Optionally, the venting assembly includes a third venting group disposed on the sand core, the third venting group being connected to the cavity from the side for venting and overflowing the cavity.

[0019] By adopting the above technical solution, the third venting group is set on the sand core and connected to the mold cavity from the side, which can effectively expel the gas in the mold cavity and avoid defects such as porosity in the casting caused by gas accumulation. At the same time, during the pouring of molten iron, when there is too much molten iron, the third venting group can also play an overflow role, preventing molten iron from overflowing and damaging the mold, ensuring the smooth progress of the casting process, and improving the quality and forming effect of the casting.

[0020] Optionally, the conveying pipe includes a first connecting section, a second connecting section, and a third connecting section, all horizontally arranged. The conveying pipe also includes a ceramic tube. The first end of the first connecting section is connected to the sprue. The second end of the first connecting section is connected to the first end of the second connecting section. The second end of the second connecting section is connected to the first end of the third connecting section. The second end of the third connecting section extends away from the sprue. The first end of the ceramic tube is connected to the third connecting section. The second end of the ceramic tube is connected to the cavity. The second connecting section is located below the first and second connecting sections, such that the input and output directions of the second connecting section are both vertical. The flow area of ​​the first connecting section is smaller than the flow area of ​​the sprue. The flow area of ​​the second connecting section is larger than the flow area of ​​the first connecting section. The flow area of ​​the third connecting section is larger than the flow area of ​​the second connecting section.

[0021] By adopting the above technical solution, the flow area of ​​the first connecting section is smaller than that of the direct sprue, which obstructs the flow of molten iron and causes it to accumulate in the direct sprue. Impurities can float to the top of the direct sprue, reducing the amount of impurities entering the first connecting section. The second connecting section is located below the first connecting section and has a larger flow area than the first connecting section. Its input and output directions are both vertical, which slows down the impact of molten iron. The flow area of ​​the third connecting section is larger than that of the second connecting section, which further slows down the impact of molten iron. At the same time, due to the arrangement of the second and third connecting sections, impurities are light and float at the top, allowing the molten iron below to flow into the mold cavity through the ceramic tube.

[0022] Optionally, an insulating riser is connected to the cavity.

[0023] By adopting the above technical solution, the heat-insulating riser is connected to the mold cavity, which can play a heat-insulating role, so that the molten iron cools down gradually in sequence during the cooling process, avoiding defects such as porosity and shrinkage caused by excessively fast or uneven cooling. At the same time, it can also provide feeding when the casting solidifies and shrinks, ensuring the quality of the casting.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The sand core has a protruding structure that fits into the positioning part of the template, which can position the sand core, improve installation efficiency, and determine whether it is installed in place; 2. The different diameters of the horizontal sections of the conveying pipeline and the reasonable design of the connection positions allow the flow rate of molten iron to be controlled, impurities to float to the top, and then enter the mold cavity through the ceramic tube, so that the molten iron flowing into the mold cavity remains clean. 3. The heat-insulating riser delays the cooling of molten iron at the riser, avoiding defects such as porosity and shrinkage in the box casting inside the mold cavity, thus improving the casting quality. Attached Figure Description

[0025] Figure 1 This is a top view of the novel box casting mold according to an embodiment of this application.

[0026] Figure 2 This is a lower schematic diagram of the novel box casting mold according to an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the protruding structure in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the casting assembly according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures: 1. Molding plate; 11. Parting surface; 111. Positioning part; 12. Positioning hole; 2. Cavity mold; 3. Sand core; 31. Protruding structure; 4. Casting assembly; 41. Direct sprue; 42. Delivery pipe; 421. First connecting section; 422. Second connecting section; 423. Third connecting section; 424. Ceramic tube; 43. Filter; 5. Cold iron; 6. Exhaust assembly; 61. First exhaust group; 62. Second exhaust group; 63. Third exhaust group; 7. Insulating riser; 8. Sand collection trough. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be further described in detail below. In this embodiment, unless otherwise specified, "connection", "linking", and "fixing" are interpreted broadly, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection, and interaction between two components, etc., and can be understood according to the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, in the description of this embodiment, terms such as "above," "below," "left," and "right," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are used only for ease of description and simplification of operation. 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 application. Unless otherwise stated, directional terms such as "inner" and "outer" used in this application refer to the outline of the corresponding component itself.

[0032] like Figure 1 As shown in the embodiment of this application, a novel box casting mold (hereinafter referred to as "casting mold") is disclosed. The casting mold includes a mold plate 1, a cavity mold 2, a sand core 3, and a casting assembly 4.

[0033] The cavity mold 2 is set on the mold plate 1, the sand core 3 is installed at the installation position formed by the mold plate 1 and fits with the cavity, the casting assembly 4 is installed on the sand mold, and the delivery pipe 42 of the casting assembly 4 connects the cavity and the direct sprue 41 of the casting assembly 4, so that the molten iron can flow from the casting assembly 4 into the cavity for casting.

[0034] like Figure 1 , Figure 2 and Figure 3As shown, specifically, the mold plate 1 includes a parting surface 11, on which a positioning part is provided for positioning the sand core 3. A cavity mold 2 is disposed on the mold plate 1 and is used to form a cavity within the sand mold (not shown). The shape and size of the cavity mold 2 are designed according to the required shape and size of the box casting.

[0035] The sand core 3 is installed at the mounting position formed by the mold plate 1 on the sand mold. The sand core 3 mates with the mold cavity. The sand core 3 has a protruding structure 31, which is inserted into the positioning part to restrict the horizontal movement of the sand core 3. The upper end face of the protruding structure 31 is flush with the parting surface 11, ensuring that the sand core 3 is installed in place. When the protruding structure 31 is inserted into the positioning part, it can accurately position the sand core 3 and prevent the sand core 3 from shaking in the horizontal direction. The sand core 3 has a sand collecting position, and the sand mold has a sand collecting groove 8. The sand collecting groove 8 is used to align with the sand collecting position and collect the sand that falls during the installation of the sand core 3, preventing these sand particles from entering the mold cavity and affecting the quality of the casting. At the same time, it can also prevent sand particles from falling onto the surface of the sand core 3, thereby affecting the installation accuracy of the sand core 3.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the cavity mold 2 and sand core 3 on the mold plate 1 can be divided into two groups, so that there is a set of cavity mold 2 and sand core 3 on the upper and lower sides of the mold plate 1, respectively, to form the structure of the upper and lower sides of the casting parting surface 11. Through the cooperation of the upper and lower sand molds and the installation of the sand core, a space for filling molten iron is formed, thereby realizing the casting of the part. The lower sand core 3 is provided with a protruding structure 31 to achieve positioning and facilitate installation. The sand collection position is set at the lower end of the lower sand core 3, such as... Figure 2 The diagram shown is a schematic of the sand collection position and the sand collection groove 8 on the sand mold after they are matched.

[0037] like Figure 1 , Figure 2 and Figure 4 As shown, the casting assembly 4 is installed on the sand mold. The casting assembly 4 includes a sprue 41 and a delivery pipe 42. One end of the delivery pipe 42 is connected to the sprue 41, and the other end is connected to the mold cavity. The sprue 41 is typically a channel with a large diameter, used to introduce molten iron into the delivery pipe 42. The two ends of the delivery pipe 42 are respectively located on both sides of the mold plate 1, which allows molten iron to flow into the mold cavity from the lower side, optimizing the casting quality of the casting and reducing problems such as uneven molten iron injection into the mold cavity from the left and right sides.

[0038] The conveying pipe 42 includes a first connecting section 421, a second connecting section 422, and a third connecting section 423, all horizontally arranged. The conveying pipe 42 also includes a ceramic tube 424. The first end of the first connecting section 421 is connected to the sprue 41, the second end of the first connecting section 421 is connected to the first end of the second connecting section 422, the second end of the second connecting section 422 is connected to the first end of the third connecting section 423, and the second end of the third connecting section 423 extends away from the sprue 41. The first end of the ceramic tube 424 is connected to the third connecting section 423, and the second end of the ceramic tube 424 is connected to the mold cavity. The second connecting section 422 is located below the first connecting section 421 and the second connecting section 422, making both its input and output directions vertical. The flow area of ​​the first connecting section 421 is smaller than the flow area of ​​the sprue 41, the flow area of ​​the second connecting section 422 is larger than the flow area of ​​the first connecting section 421, and the flow area of ​​the third connecting section 423 is larger than the flow area of ​​the second connecting section 422. This design allows the molten iron to gradually slow down during its flow, while simultaneously causing impurities to float to the surface, thus improving the cleanliness of the molten iron.

[0039] like Figure 1 , Figure 2 and Figure 4 As shown, the casting assembly 4 includes a filter 43, which is connected to the conveying pipe 42 and is used to filter the molten iron in the conveying pipe 42 to ensure the quality of the molten iron flowing into the mold cavity. The type of filter 43 is not limited, and an existing structure can be selected as needed.

[0040] In this embodiment, two sets of conveying pipes 42 are provided, located on the left and right sides of the direct pouring gate 41 respectively. This dual-sided pouring method can accelerate the filling speed of molten iron, shorten the pouring time, and improve production efficiency.

[0041] like Figure 1 and Figure 2 As shown, the casting mold also includes several chills 5, which are distributed on the mold cavity. The chills 5 can rapidly cool the molten iron through their cooling effect, eliminating internal defects in the casting and reducing the tendency for shrinkage porosity. The chills 5 can be installed in the machining area or around the sand core 3, etc., and the specific installation position, shape, and size can be set as needed.

[0042] like Figure 1 and Figure 2As shown, the casting mold also includes an venting assembly 6, which comprises a first venting group 61 and a second venting group 62. The first venting group 61 is connected to the sand core 3 for venting the sand core 3, and the second venting group 62 is connected to the mold cavity for venting the mold cavity. The venting assembly 6 also includes a third venting group 63, which is located on the sand core 3 and connected to the mold cavity from both the left and right sides for venting the mold cavity and for overflow. The venting assembly 6 includes, but is not limited to, using vent pipes to discharge gases generated during the casting process and prevent defects such as porosity in the casting. Simultaneously, the venting assembly 6 also performs slag removal, improving the quality of the casting; the third venting group 63 is located on both sides of the mold cavity, allowing for easy disassembly and separation from the mold cavity or casting, reducing the impact on the casting.

[0043] The mold plate 1 has positioning holes 12 for installing a positioning structure. This positioning structure mates with an installation station, which is located on the structure that mates with the mold plate 1 to achieve casting. The number of positioning holes 12 at both ends of the mold plate 1 differs, ensuring the mold plate 1 is oriented correctly. The positioning holes 12 can be circular or square, etc., and the positioning structure can be a positioning pin or a positioning bolt, etc. By using different numbers of positioning holes 12, the correct orientation of the mold plate 1 during installation can be ensured.

[0044] like Figure 1 and Figure 2 As shown, an insulating riser 7 is connected to the mold cavity. The insulating riser 7 is generally made of insulating material. Its function is to allow the molten iron to cool gradually along the chill 5, with the final cooling occurring at the insulating riser 7. This reduces the probability of defects such as porosity and shrinkage in the casting, concentrating defects within the insulating riser 7 and thus improving the casting quality. The molten iron ultimately flows out through the upward-facing insulating riser 7 and the venting assembly 6, thus filling the mold cavity. Existing structures can be used for the insulating riser 7; given the existing technology, its structure will not be described in detail here. The appropriate type can be selected according to the needs.

[0045] It is understood that the casting mold also includes necessary structures for connection, support, driving, positioning, limiting, and sealing to ensure its normal operation. The shape, size, material, and quantity of each part of the casting mold can be determined as needed to achieve the corresponding functions. Since the principle of casting through structures such as mold plates, sand molds, and sand cores is already existing technology, it will not be described in detail here. This embodiment only describes and protects the structure of the casting mold.

[0046] The implementation principle of this embodiment is as follows: The novel box-type casting mold, through the cooperation of the positioning part on the mold plate 1 and the protruding structure 31 of the sand core 3, achieves accurate installation and positioning of the sand core 3, improving installation efficiency and precision. The special design of the conveying pipe 42 and the setting of the filter 43 effectively control the flow rate of the molten iron, filter impurities, and ensure the cleanliness of the molten iron flowing into the mold cavity. The distribution of chills 5 and the setting of the heat-insulating risers 7 facilitate rapid and gradual cooling of the molten iron, reducing internal defects and shrinkage porosity in the casting. The setting of the venting assembly 6 removes slag and gas generated during the casting process, improving the quality of the casting.

[0047] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel box-type casting mold, characterized in that, include: A molding plate (1) includes a parting surface (11) and a positioning part (111) is provided on the parting surface (11); Cavity mold (2), the cavity mold (2) is disposed on the mold plate (1) and is used to form a cavity in the sand mold; A sand core (3) is installed at the installation position formed by the mold plate (1). The sand core (3) is fitted with the mold cavity. The sand core (3) is provided with a protruding structure (31). The protruding structure (31) is inserted into the positioning part (111) to restrict the horizontal movement of the sand core (3). The upper end face of the protruding structure (31) is flush with the parting surface (11) so that the sand core (3) is installed in place. A casting assembly (4) is installed on the sand mold. The casting assembly (4) includes a sprue (41) and a conveying pipe (42). One end of the conveying pipe (42) is connected to the sprue (41), and the other end of the conveying pipe (42) is connected to the cavity.

2. The novel box-type casting mold according to claim 1, characterized in that, The sand core (3) is provided with a sand collection position, and the sand mold is provided with a sand collection groove (8). The sand collection groove (8) is used to align with the sand collection position to collect the sand that falls during the installation of the sand core (3).

3. The novel box-type casting mold according to claim 1, characterized in that, It also includes several chills (5), which are distributed on the cavity.

4. The novel box-type casting mold according to claim 1, characterized in that, The two ends of the conveying pipe (42) are respectively located on both sides of the mold plate (1).

5. The novel box-type casting mold according to claim 1, characterized in that, The casting assembly (4) includes a filter (43) connected to the conveying pipe (42) for filtering molten iron in the conveying pipe (42).

6. The novel box-type casting mold according to claim 1, characterized in that, It also includes an exhaust assembly (6), which includes a first exhaust group (61) and a second exhaust group (62). The first exhaust group (61) is connected to the sand core (3) and is used to exhaust the sand core (3). The second exhaust group (62) is connected to the cavity and is used to exhaust the cavity.

7. The novel box-type casting mold according to claim 6, characterized in that, The exhaust assembly (6) includes a third exhaust group (63), which is disposed on the sand core (3) and is connected to the cavity from the side for exhausting and overflowing the cavity.

8. The novel box-type casting mold according to claim 1, characterized in that, The conveying pipe (42) includes a first connecting section (421), a second connecting section (422), and a third connecting section (423) arranged horizontally. The conveying pipe (42) also includes a ceramic pipe (424). The first end of the first connecting section (421) is connected to the direct sprue (41), the second end of the first connecting section (421) is connected to the first end of the second connecting section (422), the second end of the second connecting section (422) is connected to the first end of the third connecting section (423), and the second end of the third connecting section (423) extends away from the direct sprue (41). The first end of the ceramic pipe (424) is connected to the first connecting section (424). One end of the ceramic tube (424) is connected to the third connecting section (423), and the second end of the ceramic tube (424) is connected to the cavity. The second connecting section (422) is located below the first connecting section (421) and the second connecting section (422), so that the input and output directions of the second connecting section (422) are both vertical. The flow area of ​​the first connecting section (421) is smaller than the flow area of ​​the direct sprue (41), the flow area of ​​the second connecting section (422) is larger than the flow area of ​​the first connecting section (421), and the flow area of ​​the third connecting section (423) is larger than the flow area of ​​the second connecting section (422).

9. The novel box-type casting mold according to claim 1, characterized in that, The cavity is connected to an insulating riser (7).

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