Molding board for casting
By designing a casting mold plate with depressions and corresponding protrusions, the cold clot mark problem caused by the inability to fully fusion of the iron during the casting process is solved, the effect of reducing the cold clot mark is achieved, and the service life of the casting is improved.
Patent Information
- Application Number
- CN202420485105.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-12
AI Technical Summary
During the casting process, the molten iron cannot be fully fused, resulting in obvious traces of inconsistent depth at the molten iron convergence position when the casting is generated, namely the cold separator mark.
A mold plate for casting is designed, wherein the inner wall of the mold cavity has a depression and a projection corresponding to the depression is formed on the outer wall. This type of plate forms a sand type by pressing, and high-temperature metal liquid is stored in the depressions of the sand type, ensuring that the metal liquid can be fully fused and reducing the occurrence of cold separator marks.
With this casting mold plate, the cold clot marks of the casting can be reduced, thereby improving the service life of the casting and reducing oil leakage, water leakage and other faults that occur during long-term movement of the engine.
Smart Images
Figure CN222492067U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of casting, in particular to a casting mold plate. Background Art
[0002] Casting is a common process, usually bottom pouring. During casting, the molten metal is introduced into the cavity from the bottom of the mold through the runner, that is, the molten metal accumulates from the bottom to the top and finally cools to form a casting.
[0003] However, if the molten iron cannot be fully fused, obvious marks of inconsistent depth will appear at the place where the molten iron converges when the casting is produced, namely the cold shut marks.
[0004] Therefore, how to reduce the condensation marks on castings has become a technical problem that needs to be solved urgently in this field. Utility Model Content
[0005] The purpose of the utility model is to at least solve the problem of how to reduce the cold shut condensation marks on castings. This purpose is achieved through the following technical solutions:
[0006] In the first aspect, the utility model proposes a casting mold plate for pressing to form a sand mold, comprising: a main body, having a mold cavity, the inner wall of the mold cavity having a recess, the recess being used to accommodate molten metal, the outer wall of the main body being formed with a protrusion corresponding to the recess; and a runner, located at the bottom of the main body, for introducing the molten metal into the mold cavity.
[0007] This casting mold plate has a depression on the inner wall of its cavity and a protrusion corresponding to the depression on the outer wall of the main body. It can be understood that the sand mold formed by pressing this mold plate also has depressions and protrusions. When the sand mold is used to cast a casting, the high-temperature molten metal slowly accumulates from the bottom of the sand mold cavity to the top, and the high-temperature molten metal is stored in the depressions of the sand mold, so that the molten metal can be fully fused, reducing the phenomenon of cold shut during the condensation of the molten metal, thereby reducing the situation where the casting formed by casting has cold shut marks.
[0008] In some embodiments of the present invention, a top and / or side wall of the main body is provided with a protrusion.
[0009] In some embodiments of the present invention, the protrusion is arranged on the top of the main body.
[0010] In some embodiments of the present invention, the protrusion includes a plurality of spherical protrusions arranged at intervals.
[0011] In some embodiments of the present invention, the plurality of spherical protrusions are evenly spaced and distributed.
[0012] In some embodiments of the present invention, a plurality of spherical protrusions are distributed in an array.
[0013] In some embodiments of the present invention, the protrusions are strip-shaped protrusions.
[0014] In some embodiments of the present invention, the casting mold plate further includes a drainage channel, which is connected to the pouring channel and is used to introduce the molten metal into the pouring channel.
[0015] In some embodiments of the present invention, the flow channel is a linear flow channel.
[0016] In some embodiments of the present invention, the drainage channel is perpendicular to the bottom surface of the main body.
[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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:
[0019] Figure 1 A schematic diagram of the structure of a casting mold plate provided in an embodiment of the utility model;
[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0021] Figure 3 A schematic diagram of the structure of the spherical protrusion in the casting mold plate provided in an embodiment of the utility model;
[0022] Figure 4 A partial structural schematic diagram of another casting template provided in an embodiment of the utility model.
[0023] The reference numerals are as follows:
[0024] 10. Template
[0025] 1. Subject;
[0026] 2. protrusion; 21. spherical protrusion; 22. strip protrusion;
[0027] 3. Drainage channel. DETAILED DESCRIPTION
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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 upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0032] At present, there are many ways of casting. For example, castings formed by sand casting usually adopt bottom pouring casting. The method is roughly as follows: first use the mold plate to press to form a sand mold (the sand mold is a structure with a mold cavity made of raw sand, binder and other auxiliary materials in the casting production process, including the casting surface, runner, pouring system, etc.), and then pouring high-temperature molten metal into the sand mold cavity through the runner. The high-temperature molten metal accumulates from bottom to top until it fills the sand mold cavity, and finally the molten metal condenses to form a casting.
[0033] However, taking the bottom pouring casting method to form vermicular cast iron as an example, vermicular cast iron contains a lot of magnesium and carbon elements, has a large surface tension, is more likely to shrink, and is not easy to fuse. After the vermicular molten iron merges, due to the low temperature, it cannot be fully fused, and obvious marks of inconsistent depth are produced at the location where the molten iron merges, namely, cold shut condensation marks. In severe cases, the cold shut condensation marks penetrate deep into the casting, causing the wall thickness of the casting to decrease. Because the wall thickness of the casting at this location is smaller than the surrounding wall thickness, the force is concentrated here to form an easily broken structure. If the cast casting is a cylinder head, it is easy to cause oil leakage, water leakage and other faults during the long-term operation of the engine.
[0034] Based on the above considerations, in order to solve the problem of cold shut condensation marks on castings, the present application designs a casting mold plate, which can reduce the phenomenon of cold shut during the condensation of molten metal, thereby reducing the situation where castings formed by casting have cold shut condensation marks.
[0035] Figure 1 A schematic diagram of the structure of the casting mold plate provided in the embodiment of the utility model, Figure 2 for Figure 1 The enlarged picture of A in the middle is as follows: Figure 1 and Figure 2As shown, the utility model provides a casting mold plate 10 for pressing to form a sand mold, comprising: a main body 1, having a mold cavity (internal structure, not shown in the figure), the inner wall of the mold cavity having a recess, the recess being used to accommodate molten metal, the outer wall of the main body 1 being formed with a protrusion 2 corresponding to the recess; and a runner (internal structure, not shown in the figure), located at the bottom of the main body 1, for introducing the molten metal into the mold cavity.
[0036] In the present embodiment, since the inner wall of the cavity of the casting mold plate 10 has a depression and the outer wall of the main body 1 is formed with a protrusion 2 corresponding to the depression, it can be understood that the sand mold formed by pressing this mold plate 10 also has a depression and a protrusion 2; when the sand mold is used to cast the casting, the high-temperature molten metal flows from the runner to the bottom of the cavity of the sand mold, and then slowly accumulates to the top of the cavity of the sand mold until it fills the cavity of the sand mold. The high-temperature molten metal will be stored in the depression of the sand mold, so that the molten metal can be fully fused, reducing the phenomenon of cold shut during the condensation of the molten metal, thereby reducing the situation where the casting formed by casting has cold shut condensation marks.
[0037] Specifically, if the casting finally cast by using the casting template 10 is a cylinder head, during the long-term operation of the engine, the cylinder head reduces the presence of cold shut condensation marks, thereby reducing the occurrence of engine oil leakage, water leakage and other faults.
[0038] Therefore, the casting mold plate 10 can reduce the cold shut condensation marks of the casting, thereby improving the service life of the casting.
[0039] According to an optional embodiment of the present application, a protrusion 2 is provided on the top and / or side wall of the main body 1 .
[0040] In the present embodiment, since the top and / or side walls of the main body 1 are provided with protrusions 2, and the protrusions 2 are arranged correspondingly to the depressions, it means that the depressions are located on the top wall and / or side walls of the cavity, that is, the depressions of the mold plate 10 can cover the inner wall of the cavity, which means that the depressions of the sand mold formed by pressing the mold plate 10 of the present embodiment also cover the inner wall of the cavity of the sand mold; when the sand mold is used to cast the casting, the entire cavity of the sand mold will store more high-temperature molten metal, so that the molten metal in the entire cavity can be fully fused, further reducing the phenomenon of cold shut during the condensation of the molten metal, thereby further reducing the situation where the casting formed by casting has cold shut condensation marks.
[0041] According to an optional embodiment of the present application, the protrusion 2 is arranged on the top of the main body 1, such as Figure 1 shown.
[0042] In this embodiment, according to the above analysis, it can be known that the depression of the sand mold formed by pressing the mold plate 10 of this embodiment is also located on the top wall of the cavity of the sand mold. Therefore, when the sand mold is used to cast the casting, more high-temperature molten metal will be stored on the top of the cavity of the sand mold, so that the molten metal on the top of the cavity can be fully fused, and the top of the casting finally generated can reduce cold shut marks.
[0043] Specifically, since the location where cold shut marks are produced in the final casting is mostly at the top during casting, that is, the top; the temperature at this location is relatively low, and insufficient fusion of the molten metal is prone to occur. Therefore, in this embodiment, the protrusion 2 is set at the top of the main body 1 to focus on overcoming the location where cold shut is prone to occur during casting. While ensuring that the occurrence of cold shut marks on the casting formed by casting can be reduced, it also simplifies the manufacturing process of the mold plate 10 to a certain extent, thereby improving the manufacturing efficiency.
[0044] It should be noted that the location of the recess of the mold plate 10 in the present embodiment is for illustration only. When the mold plate 10 is actually manufactured, it may be determined according to the specific working conditions. For example, the recess may be set on the top wall or side wall of the mold cavity of the mold plate 10 main body 1, as long as it can reduce the cold shut condensation marks of the final molded casting, without specific limitation.
[0045] Figure 3 The schematic diagram of the structure of the spherical protrusion in the casting mold plate provided by the embodiment of the utility model is shown in FIG. Figure 2 and Figure 3 According to an optional embodiment of the present application, the protrusion 2 includes a plurality of spherical protrusions 21 arranged at intervals.
[0046] Specifically, the plurality of spherical protrusions 21 are evenly spaced and distributed, for example, the plurality of spherical protrusions 21 are distributed in an array, such as Figure 2 shown.
[0047] In this embodiment, a plurality of spherical protrusions 21 distributed in an array can be provided at the selected position of the mold plate 10 corresponding to the position where the final molded casting is prone to cold shut (e.g., the top of the mold plate 10). The beneficial effect of this approach is that more high-temperature molten metal can be accumulated at the position where the casting is prone to cold shut during casting, thereby reducing the situation where the casting formed by casting has cold shut condensation marks; moreover, the size of the spherical protrusion 21 does not need to be too large, so that the structural size of the casting itself will not be greatly changed due to the provision of the protrusion 2.
[0048] It should be noted that the spherical protrusion 21 in this embodiment is only an example. When the mold plate 10 is actually manufactured, it can be determined according to the specific working conditions. It only needs to reduce the cold shut condensation marks of the final molded casting, and no specific limitation is made.
[0049] For example, Figure 4A partial structural diagram of another casting mold plate provided in an embodiment of the utility model, referring to Figure 4 As an optional embodiment of the present application, the protrusion 2 can be set as a strip protrusion 22, and the strip protrusion 22 can be multiple, and multiple strip protrusions 22 can be cross-arranged to form a grid structure, and its beneficial effect is the same as that of multiple spherical protrusions 21, which will not be repeated.
[0050] Continue to refer Figure 1 According to an optional embodiment of the present application, the casting mold plate 10 further includes a runner 3, which is connected to the pouring channel and is used to introduce the molten metal into the pouring channel.
[0051] In this embodiment, since the mold plate 10 includes the drainage channel 3, the sand mold pressed and formed by the mold plate 10 will also have the drainage channel 3, so that the high-temperature molten metal can be introduced into the pouring channel during casting.
[0052] According to an optional embodiment of the present application, the drainage channel 3 is a linear channel.
[0053] In this embodiment, specifically, the drainage channel 3 may be perpendicular to the bottom surface of the main body 1, such as Figure 1 shown.
[0054] In this arrangement, since the flow channel 3 is a linear flow channel and is perpendicular to the bottom surface of the main body 1, the high-temperature molten metal can flow into the pouring channel as quickly as possible under the action of its own gravity, thereby improving the casting efficiency.
[0055] 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. A casting mold plate, used for pressing to form a sand mold, characterized in that: include: A main body having a cavity, an inner wall of the cavity having a depression for containing molten metal, and an outer wall of the main body having a protrusion corresponding to the depression; as well as A runner is located at the bottom of the main body and is used to introduce molten metal into the cavity.
2. The casting template according to claim 1, characterized in that: The top and / or side wall of the main body is provided with the protrusion.
3. The casting template according to claim 1, characterized in that: The protrusion is arranged on the top of the main body.
4. The casting template according to claim 1, characterized in that: The protrusions include a plurality of spherical protrusions arranged at intervals.
5. The casting template according to claim 4, characterized in that: The plurality of spherical protrusions are evenly spaced and distributed.
6. The casting template according to claim 5, characterized in that: The plurality of spherical protrusions are distributed in an array.
7. The casting template according to claim 1, characterized in that: The protrusions are strip-shaped protrusions.
8. The casting template according to any one of claims 1 to 7, characterized in that: The casting mold plate further comprises a drainage channel, which is communicated with the pouring channel and is used to introduce molten metal into the pouring channel.
9. The casting template according to claim 8, characterized in that: The drainage channel is a linear flow channel.
10. The casting template according to claim 9, characterized in that: The drainage channel is perpendicular to the bottom surface of the main body.