Heat dissipation structure of machine body casting mold and machine body casting mold
By designing annularly arranged heat sink and heat dissipation needle structures on the casting mold, the problem of shrinkage defects at the highest end of the casting is solved, the casting process yield is improved, and efficient heat dissipation and high-quality production of the castings are achieved.
Patent Information
- Application Number
- CN202323418316.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2033-12-13
AI Technical Summary
Existing casting molds are prone to shrink defects at the highest end or hot joints of castings, resulting in a decrease in the casting process yield.
Design a heat dissipation structure of the body casting mold. Through the annular arrangement of multiple heat sinks and heat dissipation needles, the casting heat sections are quickly dissipated, avoiding the occurrence of shrinkage defects and no additional shrinkage risers are added.
It effectively reduces the use of risers, improves the production rate of castings, and ensures high-quality production of castings.
Smart Images
Figure CN222359253U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of casting, and in particular to a heat dissipation structure of a machine body casting mold and the machine body casting mold. Background Art
[0002] Shrinkage defects in castings refer to collapsed pits on the surface of castings. In the cross section of the pits, there are often internal shrinkage holes or shrinkage pores. This defect on the surface of the casting is called shrinkage. Current casting bodies, such as engine bodies, are prone to shrinkage defects at the highest end or hot spots of the castings, with a shrinkage rate of over 80%. Currently, castings with dense internal structures are often produced by adding additional shrinkage-compensating risers, but the increase in the use of risers will lead to a decrease in the yield of the casting process. Utility Model Content
[0003] In view of the problems existing in the background technology, the present application provides a heat dissipation structure of a body casting mold and a body casting mold. The heat dissipation structure can achieve cooling of the sunken parts first, reduce the use of risers, and improve the casting process yield.
[0004] According to one aspect of the utility model, a heat dissipation structure of a body casting mold is provided, comprising: a plurality of heat sinks, wherein the plurality of heat sinks are arranged in a circular or arc shape and spaced apart, and at least one side of the heat sink is used to be connected to the body casting mold.
[0005] In some embodiments of the present invention, the heat dissipation structure further includes: a heat dissipation pin, one end of which is used to be connected to the body casting mold; the heat dissipation pin is located within the circumference surrounded by the multiple heat sinks or on the concave side of the arc.
[0006] In some embodiments of the present invention, the heat dissipation needles gradually become thicker from a direction away from the machine body casting mold to a direction close to the machine body casting mold.
[0007] In some embodiments of the present invention, the intervals between the plurality of heat sinks arranged in a circumferential range or in an arc shape are 30°-45°.
[0008] In some embodiments of the present invention, the thickness of the heat sink is D / 4-D / 6, where D is the wall thickness of the casting where the shrinkage occurs.
[0009] In some embodiments of the present invention, the heat sink gradually becomes thicker from a direction away from the machine body casting mold to a direction close to the machine body casting mold.
[0010] In some embodiments of the present invention, a first straight edge and a second straight edge adjacent to each other are formed on the heat sink.
[0011] According to another aspect of the utility model, a body casting mold is provided, comprising the above-mentioned heat dissipation structure.
[0012] In some embodiments of the present invention, the machine body casting mold includes a casting pattern, and the heat dissipation structure is connected to a thermal node of the casting pattern.
[0013] In some embodiments of the present utility model, the machine body casting mold further includes an overflow riser, the overflow riser is arranged at the highest point of the casting pattern, and the heat dissipation structure is also connected to the overflow riser.
[0014] An embodiment of the present application provides a heat dissipation structure of a body casting mold. The heat dissipation structure uses multiple heat sinks in conjunction with heat sink pins. With the hot node of the body casting mold or the highest point of the casting as the center, multiple heat sinks are connected to the surface of the body casting mold in a ring arrangement, and one end of the heat sink pin is connected to the body casting mold, so that the hot node of the casting or the highest point of the casting can dissipate heat quickly. When the molten iron at other positions has not yet cooled, this position is cooled first, and the surrounding molten iron is supplemented to achieve sequential solidification, thereby avoiding shrinkage defects at the highest point or hot node of the casting. There is no need to add additional shrinkage feed risers, which reduces the use of risers and improves the casting process yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0016] Figure 1 It is a schematic diagram of assembling the heat dissipation structure of the present invention on a body casting mold;
[0017] Figure 2 It is a schematic diagram showing the structure of the heat sink. Figure 2 Figure a is the front view of the heat sink. Figure 2 b is a side view of the heat sink.
[0018] The reference numerals in the attached drawings represent the following: 1. casting pattern; 2. heat sink; 3. heat sink pin; 4. overflow riser. DETAILED DESCRIPTION
[0019] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0020] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.
[0021] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.
[0022] The heat dissipation structure of the body casting mold and the body casting mold provided in the embodiments of the present application are described below in conjunction with the accompanying drawings.
[0023] The present application embodiment discloses a heat dissipation structure of a body casting mold. Figure 1 As shown, the heat dissipation structure of the body casting mold includes a plurality of heat sinks 2, which are arranged in a circular or arc shape and spaced apart, and at least one side of the heat sink 2 is used to be connected to the body casting mold.
[0024] By using the heat dissipation structure in the technical solution, with the hot node of the body casting mold as the center, multiple heat sinks 2 are in a petal-like structure, and the multiple heat sinks 2 are connected to the hot node of the body casting mold in a ring-shaped arrangement to achieve a ring-shaped heat dissipation function, so that the hot node of the casting can dissipate heat quickly. When the molten iron at other positions has not yet cooled, this position is cooled first, and the surrounding molten iron is supplemented to achieve sequential solidification, avoiding shrinkage defects at the highest point or hot node of the casting, without the need to add additional shrinkage feed risers, reducing the use of risers, and improving the casting process yield.
[0025] Specifically, the heat sink 2 in this embodiment is connected to the machine body casting mold perpendicularly to the surface of the machine body casting mold.
[0026] It should be noted that the arrangement of the plurality of heat sinks 2 on the outer surface of the body casting mold can be specifically designed and adjusted according to the flatness of the outer surface of the body casting mold corresponding to the highest point or hot spot of the casting.
[0027] For example, when the outer surface of the body casting mold corresponding to the highest point or the hot spot of the casting is relatively flat, multiple heat sinks 2 are arranged in a circle and spaced apart; when the outer surface of the body casting mold corresponding to the highest point or the hot spot of the casting is uneven, multiple heat sinks 2 are arranged in an arc shape at a lower position and spaced apart, and at least one heat sink 2 can be arranged at a higher position to assist in heat dissipation.
[0028] In some embodiments of the present invention, Figure 1 As shown, the heat dissipation structure also includes a heat dissipation pin 3, one end of which is used to connect to the body casting mold; the heat dissipation pin 3 is located within the circumference surrounded by the plurality of heat dissipation fins 2 or on the concave side of the arc. The heat dissipation pin 3 cooperates with the heat dissipation fins 2 to dissipate heat from the highest point or hot spot of the casting, further improving the heat dissipation efficiency and ensuring the stability of preferential cooling of the position prone to shrinkage.
[0029] Furthermore, the heat sink pin 3 is preferably connected to the highest point of the casting or the center point of the outer surface of the body casting mold corresponding to the hot spot; it is understandable that the multiple heat sinks 2 are also arranged around the center point.
[0030] Specifically, the heat dissipation pins 3 in this embodiment may be cylindrical or prismatic, such as triangular prisms, quadrangular prisms, pentagonal prisms, and the like.
[0031] Furthermore, the heat dissipation pin 3 gradually becomes thicker from the direction away from the body casting mold to the direction close to the body casting mold, which can reduce the weight of the heat dissipation pin 3 and reduce the impact on the body casting mold while ensuring its heat dissipation efficiency.
[0032] In some embodiments of the present invention, Figure 1 As shown, the intervals of the plurality of heat sinks 2 arranged in a circumferential range or in an arc shape are 30°-45°. The plurality of heat sinks 2 are distributed in an annular or arc shape with the defect as the center, which can achieve a better cooling effect and will not cause the sand mold of the body casting mold to be stripped.
[0033] Specifically, the intervals between the plurality of heat sinks 2 arranged in a circumferential range or in an arc shape may be 30°, 35°, 40° or 45°, etc.
[0034] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the thickness of the heat sink 2 is D / 4-D / 6, where D is the wall thickness of the shrunk part of the casting. By adjusting the thickness of the heat sink 2, it can be ensured that the heat sink 2 can achieve the cooling function of the shrunk part of the casting, avoiding the heat sink 2 being too thin to effectively dissipate heat, or the heat sink 2 being too thick to increase the impact on the body casting mold.
[0035] Furthermore, the heat sink 2 gradually becomes thicker from the direction away from the body casting mold to the direction close to the body casting mold, which can further reduce the weight of the heat sink 2 while ensuring the heat dissipation efficiency of the heat sink 2 to reduce the impact on the body casting mold.
[0036] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the heat sink 2 is a special-shaped sheet structure, on which a first straight edge and a second straight edge adjacent to each other are formed, and an arc line is connected between the two ends of the first straight edge and the second straight edge that are far away from each other to form an arc edge, so that the heat sink 2 as a whole has an approximately fan-shaped structure.
[0037] The heat sink 2 can be firmly connected to the surface of the body casting mold through the first straight edge and the second straight edge. Compared with the rectangular sheet structure, the design of the approximate fan-shaped structure can remove the part with poor heat dissipation effect. While ensuring the heat dissipation effect of the heat sink 2, the weight of the heat sink 2 is further reduced, and the damage to the heat sink 2 is reduced.
[0038] It is understandable that the angle between the first straight edge and the second straight edge can be designed according to the contour of the surface of the body casting mold so that both the first straight edge and the second straight edge can be connected to the surface of the body casting mold.
[0039] Another embodiment of the utility model provides a body casting mold, such as Figure 1 As shown, the body casting mold includes a casting pattern 1, an overflow riser 4 arranged at a high point of the casting pattern 1, and a heat dissipation structure in any of the above-mentioned embodiments.
[0040] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the heat sink 2 and the heat sink pin 3 of the heat dissipation structure are connected to the hot node of the casting pattern 1.
[0041] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the heat sink 2 of the heat dissipation structure is also connected around the overflow riser 4 on the casting pattern 1.
[0042] The body casting mold of this embodiment has all the technical effects of the heat dissipation structure of this embodiment, and the specific structure and technical effects of the body casting mold are not described in detail here. It should be noted that this embodiment only describes in detail the key technical features related to this case, and as for the technical features not related to this case, this embodiment only makes a simple illustration and a simple description. For example, this embodiment only makes a simple description of the body casting mold, and the specific structure of the body casting mold is not described in detail here.
[0043] 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 heat dissipation structure of a body casting mold, characterized in that: include: A plurality of heat sinks, wherein the plurality of heat sinks are arranged in an arc shape and spaced apart, and at least one side of the heat sink is used to be connected to the body casting mold; A heat dissipation pin, one end of which is used to be connected to the body casting mold; the heat dissipation pin is located on the concave side of the arc surrounded by the plurality of heat dissipation fins.
2. The heat dissipation structure according to claim 1, characterized in that: The heat dissipation needles gradually become thicker from a direction away from the machine body casting mold to a direction close to the machine body casting mold.
3. The heat dissipation structure according to any one of claims 1 to 2, characterized in that: The intervals between the plurality of heat sinks arranged in an arc shape are 30°-45°.
4. The heat dissipation structure according to any one of claims 1 to 2, characterized in that: The thickness of the heat sink is D / 4-D / 6, where D is the wall thickness of the shrinkage portion of the casting.
5. The heat dissipation structure according to claim 4, characterized in that: The heat sink gradually becomes thicker from a direction away from the machine body casting mold to a direction close to the machine body casting mold.
6. The heat dissipation structure according to any one of claims 1-2, characterized in that: The heat sink is formed with a first straight edge and a second straight edge adjacent to each other.
7. A body casting mold, characterized in that: It comprises the heat dissipation structure as claimed in any one of claims 1 to 6.
8. The body casting mold according to claim 7, characterized in that: The body casting mold includes a casting pattern, and the heat dissipation structure is connected to the hot node of the casting pattern.
9. The body casting mold according to claim 8, characterized in that: The body casting mold also includes an overflow riser, which is arranged at the highest point of the casting pattern, and the heat dissipation structure is also connected to the overflow riser.