Pouring mold for 180-degree low-pressure casting of engine cylinder cover
By setting the casting position on the cover surface in the casting mold of the cylinder head of the low-pressure casting engine, the problem of the casting position near the combustion chamber in the prior art is solved, and the high performance of the engine is achieved The required low-pressure casting process also improves production efficiency and reduces costs.
Patent Information
- Application Number
- CN202420401823.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-01
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-01
AI Technical Summary
In the prior art, when casting engine cylinder heads at low pressure, the casting position is near the combustion chamber, resulting in the final solidification of the combustion chamber position, which easily leads to a large dendritic spacing, which cannot meet the engine's high compression ratio, high explosion pressure, and high power. Performance requirements.
A casting mold for the cylinder head of a 180° low-pressure casting engine is designed, and the casting position of the casting is set on the cover surface of the engine cylinder head, so that the casting liquid enters the casting cavity through the gate, so that the combustion chamber surface is solidified as soon as possible.
Through this design, the thick dendrites are avoided, and the engine's performance requirements for high compression ratio, high explosion pressure and high power are met. At the same time, the casting yield and production efficiency are improved, and the casting cost is reduced.
Smart Images
Figure CN222492114U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine cylinder head casting, in particular to a casting mold for a 180-degree low-pressure casting engine cylinder head. Background Art
[0002] A mold is a model block used to manufacture products and is an important material basis of modern industry. In particular, the position of metal molds in the machinery manufacturing industry is irreplaceable. They are widely used in the automotive, electronic and electrical, light industry, aviation and other industries. With the accelerated technological update of the machinery manufacturing industry, the number of industrial products that need to be processed with molds has reached 90%. It has become the foundation of modern industrial development and an important part of the industrialization of new technologies. The position of the metal mold industry in the machinery manufacturing industry is becoming increasingly apparent.
[0003] Aluminum alloy has the advantages of low density, strong corrosion resistance, good heat dissipation, high specific strength, good plasticity and multiple processing, and is currently a good material for manufacturing wheels and other parts. Automobile wheels made of aluminum alloy can greatly reduce their own weight, reduce the inertia of automobile starting and driving, and reduce fuel consumption; at the same time, it also reduces the vibration generated during the driving process of the car, which is conducive to increasing the driving speed and improving the driving stability.
[0004] Low-pressure casting is a casting method between gravity casting and pressure casting. It is a special casting method that uses gas pressure or electromagnetic force to press metal into the model block and makes the aluminum parts crystallize and solidify under a certain pressure. Low-pressure casting can greatly improve the shrinkage compensation effect of aluminum parts. The structure of aluminum parts is uniform and dense, and the mechanical properties are higher than those of general gravity casting aluminum parts. Therefore, the low-pressure casting method can obtain aluminum parts with higher quality than general gravity casting and thin-walled complex aluminum parts that are difficult to form by general gravity casting, especially Figure 1 The complex structural casting of the engine cylinder head shown.
[0005] The engine cylinder head generally includes a cover surface and a combustion chamber surface that are relatively arranged, and the traditional low-pressure casting generally pours from the combustion chamber surface of the engine cylinder head, and then uses the temperature difference between the top mold and the bottom mold to perform pressure compensation. However, since the casting is poured near the combustion chamber during the above casting process, the combustion chamber position must be the last area of the casting to solidify, which easily causes its dendrite spacing (DAS) to be coarse and cannot meet the engine's performance requirements for high compression ratio, high explosion pressure, and high power. Therefore, for diesel engine cylinder heads with a DAS requirement of ≤30μm, the existing technology mainly uses gravity casting technology for production. Utility Model Content
[0006] The purpose of the utility model is to propose a casting mold for a 180° low-pressure casting of an engine cylinder head, and to set the pouring position of the casting on the cover surface of the engine cylinder head, so that the engine cylinder head can be produced by a low-pressure casting process, which not only improves the casting material yield and production efficiency, but also effectively reduces the casting cost.
[0007] To achieve this purpose, the utility model adopts the following technical solutions:
[0008] A casting mold for a 180° low-pressure casting engine cylinder head, comprising a base, a mold body and a sand core assembly; the mold body is detachably mounted on the base, the sand core assembly is detachably mounted inside the mold body, and the mold body and the sand core assembly together form a casting cavity for containing casting liquid;
[0009] The casting cavity comprises a cover surface and a combustion chamber surface which are arranged opposite to each other. The mold body is provided with a pouring gate which is arranged close to the cover surface and is communicated with the casting cavity through the cover surface.
[0010] Preferably, the casting cavity comprises a casting cavity and a runner which are interconnected, the casting cavity is provided with the cover surface and the combustion chamber surface, and the runner is located between the casting cavity and the inlet gate.
[0011] Preferably, the runner includes an inlet runner, the inlet runner includes a main runner and an auxiliary runner, the inlet gate of the main runner is located in the middle of the casting cavity, the auxiliary runners are located on both sides of the main runner, and the inlet gates of the auxiliary runners are located at the edge of the casting cavity.
[0012] Preferably, a plurality of the pouring runners are provided, and the plurality of pouring runners are arranged in parallel.
[0013] Preferably, four pouring runners are provided.
[0014] Preferably, the runner further comprises a connecting runner, wherein the connecting runner is located between the feed runner and the feed gate, and a plurality of the feed runners are connected via the connecting runner.
[0015] Preferably, the main runner is in the shape of a truncated cone.
[0016] Preferably, two auxiliary runners are provided, and the two auxiliary runners are respectively located on both sides of the main runner.
[0017] The technical solution provided by the embodiment of the utility model may have the following beneficial effects:
[0018] In this solution, the mold body and the sand core assembly together form a casting cavity for accommodating the casting liquid, and the inlet gate is connected to the casting cavity through the cover surface. When the casting liquid enters the casting cavity through the inlet gate, the combustion chamber surface of the casting cavity can solidify as early as possible to avoid causing a coarse dendrite spacing (DAS), thereby meeting the engine's performance requirements for high compression ratio, high explosion pressure, and high power. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural diagram of the engine cylinder head.
[0020] Figure 2 The utility model is a structural schematic diagram of a casting mold for a 180° low-pressure casting engine cylinder head.
[0021] Figure 3 The utility model is a structural exploded view of a casting mold for a 180° low-pressure casting engine cylinder head.
[0022] Figure 4 The utility model is a structural schematic diagram of a casting cavity in a casting mold of a 180° low-pressure casting engine cylinder head when the casting liquid is completely filled in the casting cavity.
[0023] Figure 5 The utility model is a structural schematic diagram of a pouring channel in a casting mold of a 180-degree low-pressure casting engine cylinder head when the pouring channel is completely filled with casting liquid.
[0024] Among them: base 1, mold body 2, inlet gate 201, sand core assembly 3, casting cavity 6, casting cavity 61, runner 62, inlet runner 621, main runner 6211, auxiliary runner 6212, connecting runner 622, cover surface 601, combustion chamber surface 602. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0026] The technical solution provides a casting mold for a 180° low-pressure casting engine cylinder head, comprising a base 1, a mold body 2 and a sand core assembly 3; the mold body 2 is detachably mounted on the base 1, the sand core assembly 3 is detachably mounted inside the mold body 2, and the mold body 2 and the sand core assembly 3 together form a casting cavity 6 for containing casting liquid;
[0027] The casting cavity 6 includes a cover surface 601 and a combustion chamber surface 602 that are arranged opposite to each other. The mold body 2 is provided with an inlet gate 201. The inlet gate 201 is arranged close to the cover surface 601, and the inlet gate 201 is connected to the casting cavity 6 through the cover surface 601.
[0028] In order to solve the technical problem that the existing engine cylinder head is cast from the combustion chamber surface, resulting in coarse dendrite spacing, the technical solution proposes a casting mold for a 180° low-pressure casting engine cylinder head, such as Figure 2-3 As shown, by designing the structure of the mold body 2, the pouring position of the casting is set on the cover surface of the engine cylinder head, so that the engine cylinder head can be produced by a low-pressure casting process, which not only improves the casting material yield and production efficiency, but also effectively reduces the casting cost.
[0029] Specifically, the pouring system of the present invention comprises a base 1, a mold body 2 and a sand core assembly 3, wherein the mold body 2 and the sand core assembly 3 together form a casting cavity 6 for containing the casting liquid. Figure 4-5 The structure diagram shown is when the casting cavity 6 is completely filled with casting liquid. The inlet gate 201 of this solution is arranged close to the cover surface 601, and the inlet gate 201 is connected with the casting cavity 6 through the cover surface 601. When the casting liquid enters the casting cavity 6 through the inlet gate 201, the combustion chamber surface 602 of the casting cavity 6 can solidify as early as possible to avoid causing a coarse dendrite spacing (DAS), thereby meeting the engine's performance requirements for high compression ratio, high explosion pressure, and high power.
[0030] To further explain, the casting cavity 6 includes a casting cavity 61 and a runner 62 which are interconnected, the casting cavity 61 is provided with the cover surface 601 and the combustion chamber surface 602 , and the runner 62 is located between the casting cavity 61 and the inlet gate 201 .
[0031] Furthermore, the present solution also utilizes the mold body 2 to form a runner 62 cast from the cover surface 601, so that the runner 62 becomes the last solidified area in the casting cavity 6, thereby reducing the impact of the casting process on the performance of the engine cylinder head.
[0032] It should be noted that the casting obtained by filling the casting cavity 61 with the casting liquid and solidifying it is an engine cylinder head. When the casting process is completed, the casting obtained by filling the casting cavity 61 with the casting liquid and solidifying it needs to be taken out, and the casting and the runner parts need to be separated.
[0033] Further explained, the runner 62 includes an inlet runner 621, and the inlet runner 621 includes a main runner 6211 and an auxiliary runner 6212, the inlet gate of the main runner 6211 is located in the middle of the casting cavity 61, the auxiliary runner 6212 is located on both sides of the main runner 6211, and the inlet gate of the auxiliary runner 6212 is located at the edge of the casting cavity 61.
[0034] In a preferred embodiment of the present technical solution, the runner 62 in the present solution includes an inlet runner 621, and the inlet runner 621 includes a main runner 6211 and an auxiliary runner 6212. The inlet gate of the main runner 6211 is set in the middle of the casting cavity 61, which is beneficial to pressure compensation of the cylinder head. At the same time, auxiliary runners 6212 are led out from both sides of the main runner 6211 for auxiliary inlet pouring, which is beneficial to effective filling and compensation of the cylinder head, while ensuring smooth pouring during the casting process.
[0035] To further explain, there are multiple pouring channels 621, and the multiple pouring channels 621 are arranged in parallel.
[0036] In another preferred embodiment of the present technical solution, a plurality of pouring channels 621 are provided in the present solution, which is beneficial to improving the pouring efficiency of the pouring system.
[0037] To further explain, four pouring channels 621 are provided.
[0038] To further explain, the runner 62 further includes a connecting runner 622 , and the connecting runner 622 is located between the inlet runner 621 and the inlet gate 201 , and a plurality of the inlet runners 621 are connected via the connecting runner 622 .
[0039] Furthermore, the plurality of inlet pouring channels 621 may be connected via the connecting pouring channel 622 , which helps to ensure that the pouring rate of each inlet pouring channel 621 is the same to the greatest extent possible, thereby reducing the impact on the cylinder head performance during the casting process.
[0040] To further explain, the main runner 6211 is in the shape of a truncated cone to facilitate rapid and smooth pouring.
[0041] Further, two auxiliary runners 6212 are provided, and the two auxiliary runners 6212 are respectively located on both sides of the main runner 6211, so as to more effectively fill the cylinder head and compensate for shrinkage, while ensuring smooth pouring during the casting process.
[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0044] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0045] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0046] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.
[0048] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.
Claims
1. A casting mold for a 180° low-pressure casting engine cylinder head, characterized in that: The mold body comprises a base, a mold body and a sand core assembly; the mold body is detachably mounted on the base, the sand core assembly is detachably mounted inside the mold body, and the mold body and the sand core assembly together form a casting cavity for containing casting liquid; The casting cavity comprises a cover surface and a combustion chamber surface which are arranged opposite to each other. The mold body is provided with a pouring gate which is arranged close to the cover surface and is communicated with the casting cavity through the cover surface.
2. The pouring mold for 180° low-pressure casting of an engine cylinder head according to claim 1, characterized in that: The casting cavity comprises a casting cavity and a runner which are interconnected, the casting cavity is provided with the cover surface and the combustion chamber surface, and the runner is located between the casting cavity and the inlet gate.
3. The pouring mold for 180° low-pressure casting of an engine cylinder head according to claim 2, characterized in that: The runner includes an inlet runner, and the inlet runner includes a main runner and an auxiliary runner. The inlet gate of the main runner is located in the middle of the casting cavity, the auxiliary runners are located on both sides of the main runner, and the inlet gates of the auxiliary runners are located at the edge of the casting cavity.
4. The pouring mold for 180° low-pressure casting of an engine cylinder head according to claim 3, characterized in that: The pouring runners are provided in plurality, and the plurality of pouring runners are arranged in parallel.
5. The pouring mold for 180° low pressure casting of engine cylinder head according to claim 4, characterized in that: The pouring runners are provided with four.
6. The pouring mold for 180° low-pressure casting of an engine cylinder head according to claim 4, characterized in that: The runner further comprises a connecting runner, wherein the connecting runner is located between the feed runner and the feed gate, and a plurality of feed runners are connected via the connecting runner.
7. The pouring mold for 180° low-pressure casting of an engine cylinder head according to claim 3, characterized in that: The main runner is in the shape of a truncated cone.
8. The pouring mold for 180° low pressure casting of engine cylinder head according to claim 3, characterized in that: Two auxiliary runners are provided, and the two auxiliary runners are respectively located on both sides of the main runner.