Exhaust structure and sand core mold
By designing the exhaust structure and sand discharge structure that matches the shape of the outer wall of the mold body, the problem of false injection of the sand core is solved, the compactness of the sand core and the cleanliness of the casting interior cavity are improved, and efficient exhaust and sand discharge effects are achieved. , extends service life and reduces production costs.
Patent Information
- Application Number
- CN202323670694.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-29
AI Technical Summary
Due to the complex structure of the sand core, exhaust plugs and top core rods cannot be installed in part, resulting in local misfire and poor compactness, which affects the cleanliness of the casting cavity and product quality.
An exhaust structure is designed, including an exhaust portion that matches the shape of the outer wall of the mold main body, and communicates with the exhaust chamber through the first and second exhaust slots to realize gas discharge in the complex arc surface area, and Combining the sand discharge structure and fixing part, the sand core is solid and exhaust efficiency is ensured.
It improves the compactness of the sand core and the cleanliness of the casting cavity, extends the service life of the exhaust structure, reduces labor intensity and production costs, and improves product quality.
Smart Images
Figure CN222175849U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting, in particular to an exhaust structure and a sand core mold. Background Art
[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.
[0003] The cleanliness of the inner cavity of the casting is an important indicator for detecting engine quality. Sand sticking to the inner cavity is an important factor affecting the cleanliness of the inner cavity of the casting. Therefore, improving the compactness of the sand core is crucial to reducing sand sticking to the inner cavity of the casting and thus improving the cleanliness of the inner cavity of the casting.
[0004] The existing technology usually uses exhaust plugs or cuts grooves on the core rod to exhaust most of the gas in the mold cavity. However, due to the complex structure of the sand core, exhaust plugs and core rods cannot be installed locally, resulting in partial incomplete injection of the sand core, which makes the sand core less compact and affects product quality. Utility Model Content
[0005] The purpose of the utility model is to at least solve the problem that the sand core is partially shot unsolidly due to the complex structure of the sand core, and the exhaust plug and the core push rod cannot be set locally, resulting in poor compactness of the sand core. This purpose is achieved through the following technical solutions:
[0006] The first aspect of the utility model provides an exhaust structure, comprising:
[0007] An exhaust portion, wherein an exhaust cavity is arranged inside the exhaust portion, and the exhaust cavity is communicated with the mold cavity of the mold body. The exhaust portion includes a profiling portion, and the end face of the profiling portion matches the outer wall shape of the mold body. The profiling portion is provided with a plurality of first exhaust slots, and the first exhaust slots are communicated with the exhaust cavity.
[0008] The exhaust structure of the utility model is provided with a profiling part, and the profiling part matches the shape of the outer wall of the mold main body. During sand shooting, the exhaust structure is installed as a whole on the mold main body, so that the profiling part and the outer wall of the mold main body are fitted and fixed, so that the gas in the mold cavity can directly enter the exhaust cavity through the first exhaust slot hole, and be discharged to the outside through the exhaust cavity, thereby realizing the exhaust of the complex arc surface area on the mold main body, ensuring that the sand core can be shot solid, improving the compactness of the sand core, thereby ensuring the cleanliness of the inner cavity of the casting and improving the product quality.
[0009] In addition, the exhaust structure according to the utility model may also have the following additional technical features:
[0010] In some embodiments of the present invention, the contoured portion includes a plurality of exhaust groove blockers, and the plurality of exhaust groove blockers are arranged at one axial end of the exhaust cavity, and the ends of the plurality of exhaust groove blockers away from the exhaust cavity have surfaces matching the outer wall shape of the mold body, and the first exhaust groove hole is formed between two adjacent exhaust groove blockers.
[0011] In some embodiments of the present invention, some of the exhaust groove blockers include an axial portion extending along the axial direction and a side portion connected to one end of the axial portion, the side portion has a surface matching the outer wall shape of the mold body, and the first exhaust groove is provided on both the axial portion and the side portion.
[0012] In some embodiments of the utility model, the exhaust portion also includes a main body portion, the contoured portion is connected to the end of the main body portion to form the exhaust cavity, and a second exhaust slot is provided on the main body portion, and the second exhaust slot is connected to the exhaust cavity.
[0013] In some embodiments of the present invention, the exhaust portion further includes a sand discharge structure, which is disposed between the exhaust groove block and the main body, and is used to discharge sand from the mold cavity.
[0014] In some embodiments of the present invention, the sand removal structure includes a sand removal slope, and the sand removal slope is inclined from the exhaust groove block toward the main body.
[0015] In some embodiments of the utility model, the exhaust structure also includes a fixing part, the fixing part has an exhaust port extending axially, the exhaust port is connected to and communicated with the exhaust part, a connecting piece is provided on the fixing part, and the fixing part is set on the mold body through the connecting piece.
[0016] In some embodiments of the present invention, the connecting member includes a magnet, a slot is provided on the fixing portion, and the magnet is embedded in the slot.
[0017] In some embodiments of the present invention, the first exhaust slot and the second exhaust slot are slot structures, and the width of the first exhaust slot and the width of the second exhaust slot are both smaller than the particle size of the sand material.
[0018] Another aspect of the present invention provides a sand core mold, comprising a mold body and an exhaust structure as described in any one of the above items, wherein the exhaust cavity of the exhaust structure is connected to the mold cavity of the mold body. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0020] Figure 1 The schematic diagram of the structure of the exhaust structure according to the embodiment of the utility model is schematically shown;
[0021] Figure 2 A partial structural diagram of an exhaust structure according to an embodiment of the utility model is schematically shown;
[0022] Figure 3 for Figure 2 A structural diagram from another perspective;
[0023] Figure 4 for Figure 2 A structural schematic diagram from another perspective;
[0024] Figure 5 The installation diagram of the exhaust structure according to the embodiment of the utility model is schematically shown.
[0025] The reference numerals are as follows:
[0026] 1. exhaust portion; 10. exhaust cavity; 11. contoured portion; 110. exhaust slot block; 1100. axial portion; 1101. side portion; 111. first exhaust slot hole; 12. main body portion; 120. second exhaust slot hole;
[0027] 20. Sand discharge slope;
[0028] 3. fixing part; 30. exhaust port; 31. tank body;
[0029] 4. Magnet;
[0030] 5. Lower mold. DETAILED DESCRIPTION
[0031] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0032] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0033] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0034] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.
[0035] When producing a cast cylinder head, the core sand is made into a sand core that conforms to the shape of the core box. During the core making process, the mold needs to have a good exhaust system to discharge the gas in the cavity so that the sand core fills the mold cavity. The cleanliness of the inner cavity of the casting is an important indicator for detecting the quality of the engine. The sand sticking in the inner cavity is an important factor affecting the cleanliness of the inner cavity of the casting. Therefore, improving the compactness of the sand core is crucial to reducing the sand sticking in the inner cavity of the casting and thus improving the cleanliness of the inner cavity of the casting. The related technology uses an exhaust plug or a groove treatment on the core rod to discharge the gas in the mold cavity when shooting sand. However, due to the complex structure of the sand core, the exhaust plug and the core rod cannot be set locally, resulting in the local failure of the sand core to be shot solid. Using an exhaust plug or a groove treatment on the core rod can discharge most of the gas in the mold cavity, but the exhaust plug and the core rod are prone to blockage and wear, and need to be cleaned regularly, which affects production efficiency and increases labor.
[0036] Based on the above problems, this embodiment provides an exhaust structure that can effectively improve the problem of incomplete sand shooting on complex curved surfaces, improve the compactness of the sand core, improve the cleanliness of the inner cavity, and ensure product quality, so as to solve the above technical problems.
[0037] like Figures 1 to 5 As shown, according to an embodiment of the utility model, an exhaust structure is proposed, which is arranged on the outside of the mold body. The exhaust structure includes an exhaust portion 1, and an exhaust cavity 10 is arranged inside the exhaust portion 1. The exhaust cavity 10 is used to communicate with the cavity of the mold body. The exhaust portion 1 includes a profiling portion 11, and the end face of the profiling portion 11 matches the outer wall shape of the mold body. The profiling portion 11 is provided with a plurality of first exhaust slots 111, and the first exhaust slots 111 are communicated with the exhaust cavity 10.
[0038] The exhaust structure of the utility model is provided with a profiling portion 11, and the profiling portion 11 matches the outer wall shape of the mold body. During sand shooting, the exhaust structure is installed as a whole on the mold body, so that the profiling portion 11 is fitted and fixed to the outer wall of the mold body, so that the gas in the mold cavity can directly enter the exhaust cavity 10 through the first exhaust slot 111, and be discharged to the outside through the exhaust cavity 10, thereby achieving exhaust in complex arc surface areas, ensuring that the sand core can be shot solid, and improving the compactness of the sand core, thereby ensuring the cleanliness of the inner cavity of the casting and improving product quality.
[0039] In some embodiments of the present invention, the profiling portion 11 includes a plurality of exhaust slot blocks 110, which are arranged at one axial end of the exhaust cavity 10, and the ends of the plurality of exhaust slot blocks 110 away from the exhaust cavity 10 have surfaces matching the outer wall shape of the mold body, and a first exhaust slot hole 111 is formed between two adjacent exhaust slot blocks 110. Specifically, the exhaust portion 1 is a cylindrical structure, and a plurality of exhaust slot blocks 110 are arranged along the axial direction of the exhaust portion 1, and the exhaust slot blocks 110 include an axial portion 1100 extending along the axial direction and a side portion 1101 connected to one end of the axial portion 1100, and the side portion 1101 has a surface matching the outer wall shape of the mold body, and the first exhaust slot hole 111 is arranged on the axial portion 1100 and the side portion 1101, and the end surfaces of the plurality of exhaust slot blocks 110 away from the exhaust cavity 10 are smoothly connected, and their shapes are adapted to the outer wall shape of the mold body, and the smooth transition can ensure the tightness of the fit between the profiling portion 11 and the mold body. The profiling part 11 can be changed according to different mold bodies to adapt to sand mold structures of different shapes, and has strong applicability. When shooting sand, the exhaust structure is installed on the mold body as a whole, and the side part 1101 abuts against the outer wall of the mold body, so that the side part 1101 is fitted and fixed to the mold body, thereby avoiding the incomplete sand shooting caused by the gas in the corners of the cavity being unable to be discharged. The gas in the cavity is discharged through the first exhaust slot 111, which realizes the exhaust of the complex arc surface area, ensures that the sand core can be shot solid, and improves the compactness of the sand core.
[0040] In some embodiments of the utility model, the exhaust part 1 further includes a main body 12, the profiling part 11 is connected to the end of the main body 12, and the exhaust cavity 10 is formed, and the main body 12 is provided with a second exhaust slot 120, and the second exhaust slot 120 is connected to the exhaust cavity 10. Specifically, when cutting the profiling part 11, since the thickness of the main body 12 is relatively thick, the main body 12 is partially cut, and the cutting surface and the profiling part 11 are smoothly transitioned. The second exhaust slot 120 is connected with the first exhaust slot 111, so that during the exhaust process, the gas in the cavity can be discharged through the first exhaust slot 111 and the second exhaust slot 120, thereby improving the exhaust effect and exhaust efficiency, and further improving the compactness of the sand core.
[0041] In some embodiments of the present invention, the first exhaust slot 111 and the second exhaust slot 120 are slot structures, and the width of the first exhaust slot 111 and the width of the second exhaust slot 120 are both smaller than the particle size of the sand. Specifically, the first exhaust slot 111 and the second exhaust slot 120 are formed by a wire cutting process, and a plurality of first exhaust slots 111 and second exhaust slots 120 are arranged at intervals and at the same intervals, which can ensure uniform exhaust. In addition, by setting the widths of the first exhaust slot 111 and the second exhaust slot 120 to be smaller than the particle size of the sand, the sand can be prevented from entering the first exhaust slot 111 and the second exhaust slot 120, thereby avoiding the problems of sand running and sand jam.
[0042] In some embodiments of the utility model, the exhaust part 1 also includes a sand discharge structure, which is arranged between the exhaust slot block 110 and the main body 12, and is used to discharge sand from the cavity. Specifically, the sand discharge structure includes a sand discharge slope 20, which is inclined from the exhaust slot block 110 to the main body 12. By setting the sand discharge slope 20, when sand is shot, the sand can fall to the outside of the cavity through the inclined sand discharge slope 20, which can effectively prevent the sand from clogging the first exhaust slot hole 111 and the second exhaust slot hole 120, thereby realizing the cleaning-free function of the exhaust structure, and the service life is long without replacement, reducing labor intensity and production costs, and improving production efficiency.
[0043] In some embodiments of the utility model, the exhaust structure further includes a fixing portion 3, the fixing portion 3 has an exhaust port 30 extending in the axial direction, the exhaust port 30 is connected and communicated with the exhaust portion 1, a connecting piece is provided on the fixing portion 3, and the fixing portion 3 is provided on the mold body through the connecting piece. Specifically, the fixing portion 3 is a plate-like structure, and a groove body 31 is provided on both sides of the fixing portion 3, and the two groove bodies 31 are symmetrically arranged about the exhaust portion 1. The above-mentioned connecting piece includes a magnet 4, and the number of the magnets 4 is two. The two magnets 4 are embedded in the groove body 31 one by one. When fixing, the symmetrically arranged magnets 4 can ensure the firmness and reliability of the installation of the exhaust structure. The exhaust structure is fixed to the mold body as a whole through the magnetic effect of the magnet 4. By providing the magnet 4, the exhaust structure and the mold body can be detachably connected, which is convenient for the installation and disassembly of the exhaust structure. The disassembly operation is simple and fast, and the disassembly and assembly of the exhaust structure can be completed simply and efficiently, and the assembly efficiency is high.
[0044] In other embodiments, the number of magnets 4 and slots 31 can be one, three or four, etc., which can be set according to actual needs; in addition, the connecting piece can also be set as a screw, and a screw hole is set on the fixing part 3, so that the exhaust structure is fixed to the mold body by screws, or a clamping block and a clamping slot are respectively set on the fixing part 3 and the mold body, so that the exhaust structure is clamped and fixed to the mold body, or other connection methods are used.
[0045] The second aspect of the utility model provides a sand core mold, such as Figure 5 As shown, the sand core mold includes a mold body and the above-mentioned exhaust structure, and the exhaust cavity 10 of the exhaust structure is connected to the mold cavity of the mold body.
[0046] The above-mentioned mold body includes an upper mold and a lower mold 5. When sand shooting, the upper mold and the lower mold 5 are cleaned and placed in a sand shooting machine. Then, the upper mold and the lower mold 5 are molded together. The exhaust structure is installed as a whole at the bottom of the lower mold 5 through magnetic action, so that the contour part 11 fits and fixes the outer wall shape of the lower mold 5, and the exhaust cavity 10 of the exhaust structure is connected with the mold cavity. Then, the sand shooting machine is started, and sand is shot from the sand shooting plate into the mold cavity through the upper mold. When sand shooting, the gas in the mold cavity can directly enter the exhaust cavity 10 through the first exhaust slot 111, and be discharged to the outside through the exhaust cavity 10, so as to ensure that the sand core can be shot solid and improve the compactness of the sand core. In addition, due to the provision of a sand discharge structure with an inclination, the sand falls to the outside of the mold cavity through the sand discharge inclined surface 20 due to gravity, which can effectively prevent the sand from clogging the first exhaust slot 111 and the second exhaust slot 120, thereby realizing the cleaning-free function of the exhaust structure, and the service life is long without replacement, reducing labor intensity and production costs, and improving production efficiency.
[0047] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An exhaust structure, applied to a mold body, characterized in that: include: An exhaust portion, wherein an exhaust cavity is arranged inside the exhaust portion, and the exhaust cavity is communicated with the mold cavity of the mold body. The exhaust portion includes a profiling portion, and the end face of the profiling portion matches the outer wall shape of the mold body. The profiling portion is provided with a plurality of first exhaust slots, and the first exhaust slots are communicated with the exhaust cavity.
2. The exhaust structure according to claim 1, characterized in that: The contoured portion includes a plurality of exhaust groove blockers, which are arranged at one axial end of the exhaust cavity, and one end of the exhaust groove blockers away from the exhaust cavity has a surface matching the outer wall shape of the mold body, and the first exhaust groove hole is formed between two adjacent exhaust groove blockers.
3. The exhaust structure according to claim 2, characterized in that: Several of the exhaust groove blockers include an axial portion extending along the axial direction and a side portion connected to one end of the axial portion, the side portion has a surface matching the outer wall shape of the mold body, and the first exhaust groove is provided on both the axial portion and the side portion.
4. The exhaust structure according to claim 2, characterized in that: The exhaust portion further comprises a main body portion, the contoured portion is connected to the end of the main body portion and forms the exhaust cavity, and a second exhaust slot hole is provided on the main body portion, and the second exhaust slot hole is communicated with the exhaust cavity.
5. The exhaust structure according to claim 4, characterized in that: The exhaust part also includes a sand discharge structure, which is arranged between the exhaust groove block and the main body, and is used to discharge sand from the mold cavity.
6. The exhaust structure according to claim 5, characterized in that: The sand discharge structure comprises a sand discharge inclined surface, and the sand discharge inclined surface is inclinedly arranged from the exhaust groove block toward the main body.
7. The exhaust structure according to any one of claims 1 to 6, characterized in that: The exhaust structure further comprises a fixing part, wherein the fixing part has an exhaust port extending in the axial direction, the exhaust port is communicated with the exhaust cavity, a connecting piece is arranged on the fixing part, and the fixing part is arranged on the mold body through the connecting piece.
8. The exhaust structure according to claim 7, characterized in that: The connecting member comprises a magnet, a slot body is arranged on the fixing portion, and the magnet is embedded in the slot body.
9. The exhaust structure according to claim 4, characterized in that: The first exhaust slot and the second exhaust slot are slot structures, and the width of the first exhaust slot and the width of the second exhaust slot are both smaller than the particle size of the sand material.
10. A sand core mold, characterized in that: The invention comprises a mold body and a venting structure according to any one of claims 1 to 9, wherein the venting cavity of the venting structure is communicated with the cavity of the mold body.