CN108723294A - The sand mould structure of automobile engine system bearing cap - Google Patents

Abstract

This application discloses the sand mould structures of automobile engine system bearing cap, including sand mold ontology, filter screen pedestal, sprue cup, the filter screen pedestal is set to the sprue cup bottom, the filter screen pedestal is respectively communicated in the first sprue and second sprue one end, the first sprue other end is communicated in third sprue, the second sprue other end is communicated in the 4th sprue, and the first casting cavity, the second casting cavity, third casting cavity, the 4th casting cavity, the 5th casting cavity are provided on the sand mold ontology.The advantage of the invention is that using the technique of five cavities, and ingate is placed into bearing cap side, not only improves product yield, ensure that product quality, also improves production efficiency.

Description

Sand mold structure of bearing cap of automobile engine system

technical field

The application relates to the field of casting of automobile parts, in particular to a sand mold structure of a bearing cap of an automobile engine system.

Background technique

The engine system bearing cap is a platform product. The same engine platform can be applied to many models. The demand for this product is very large. With the fierce competition in the auto parts industry, the client has a high demand for the appearance and internal quality of the product. The requirements are getting higher and higher, and the price competition is more intense. Such a large output and quality requirements make the production enterprises face severe challenges.

At present, similar products cast by traditional technology adopt a symmetrical design of four cavities, and the inner runner enters the iron from the bottom of the bearing cap. The yield rate is about 50%, the production efficiency is low, and the appearance quality of the product is average, which is not conducive to the company's market success. Chemical competition.

Therefore, it is necessary to design a new casting system for bearing cap molds that improves process yield, reduces costs, ensures product quality, and increases production capacity.

Contents of the invention

The purpose of the present invention is to provide a sand mold structure for the bearing cap of the automobile engine system, which adopts the process of five cavities, and the inner runner is placed on the side of the bearing cap, which not only improves the process yield, ensures the product quality, but also improves the production efficiency.

To achieve the above object, the present invention provides the following technical solutions.

The embodiment of the present application discloses a sand mold structure of a bearing cap of an automobile engine system, including a sand mold body, a filter base, and a sprue cup, the filter base is arranged at the bottom of the sprue cup, and the filter bases are connected At one end of the first sprue and the second sprue, the other end of the first sprue is connected to the third sprue, and the other end of the second sprue is connected to the fourth sprue, and the other end of the second sprue is connected to the fourth sprue. The sand mold body is provided with a first casting cavity, a second casting cavity, a third casting cavity, a fourth casting cavity, and a fifth casting cavity,

The first casting cavity is sequentially connected to the first molten iron hot riser, the first hot riser inner runner, and the first straight runner, and the other side of the first casting cavity is sequentially connected to the first side surface Sprue, the first straight sprue;

The second casting cavity is sequentially connected to the second molten iron hot riser, the second hot riser inner runner, and the third sprue, and the other side of the second casting cavity is sequentially connected to the second side surface Sprue, third sprue;

The third casting cavity is sequentially connected to the third molten iron hot riser, the third hot riser inner runner, and the first straight runner, and the other side of the third casting cavity is sequentially connected to the third side surface Sprue, third sprue;

The fourth casting cavity is sequentially connected to the fourth molten iron hot riser, the fourth hot riser inner runner, and the second sprue, and the other side of the fourth casting cavity is sequentially connected to the fourth side Sprue, second sprue;

The fifth casting cavity is sequentially connected to the fifth molten iron hot riser, the fifth hot riser inner runner, and the fourth sprue, and the other side of the fifth casting cavity is sequentially connected to the fifth side Sprue, the fourth sprue.

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the first sprue, the second sprue, the third sprue and the fourth sprue are arranged on the side of the bearing cap.

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the first hot riser inrunner, the second hot riser inrunner, the third hot riser inrunner, the fourth hot riser inrunner, The inner runners of the fifth hot riser are lapped into the molten iron in thin slices respectively.

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the inner runner of the first side, the inner runner of the second side, the inner runner of the third side, the inner runner of the fourth side, and the inner runner of the fifth side The sprues are respectively lapped into the molten iron in thin slices.

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the side of the bearing cap is provided with an air outlet sheet, and the first casting cavity, the second casting cavity, the third casting cavity, and the fourth casting cavity The cavity and the cavity of the fifth casting respectively overlap the air outlet sheet.

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the cross-sectional areas of the first sprue, the second sprue, the third sprue, and the fourth sprue are respectively 330, 240, and 200 , 140mm ² .

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the first hot riser inrunner, the second hot riser inrunner, the third hot riser inrunner, the fourth hot riser inrunner, The cross-sectional areas of the inner sprues of the fifth hot riser are 120, 90, 100, 120, and 90 mm ² respectively.

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the inner runner of the first side, the inner runner of the second side, the inner runner of the third side, the inner runner of the fourth side, and the inner runner of the fifth side The cross-sectional areas of the runners are 100, 80, 90, 100, and 80 mm ² respectively.

Preferably, in the above-mentioned sand mold structure of the bearing cap of the automobile engine system, the first molten iron inlet thermal riser, the second molten iron inlet thermal riser, the third molten iron inlet thermal riser, the fourth molten iron inlet The volumes of the hot riser and the fifth molten iron inlet hot riser are respectively 270cm ³ , and the modulus is 16mm.

Compared with the prior art, the present invention has the advantage that there are five cavities on each sand mold body, and the inner runner is placed on the side of the bearing cap. The process yield rate increased from 49% to about 56%; the riser and the inrunner adopt a thin-plate lap joint, which can not only buffer the molten iron, reduce the risk of sand washing, but also facilitate the feeding of the hot riser, and at the same time feed the iron ingate The side feed iron can make full use of the sand mold space compared with the bottom feed iron, and can buffer the sand flushing risk of the bottom feed iron. Adding an air outlet piece to the cavity body can help exhaust and reduce the air hole defects of the bearing cap. After adopting this process, the internal appearance Defective waste products are greatly reduced; production efficiency is increased by 25% compared with the arrangement of 4 cavities, which not only improves the process yield rate, ensures product quality, but also reduces the scrap rate and improves production efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in this application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 shows the structural schematic diagram of the sand mold structure of the bearing cap of the automobile engine system in a specific embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

As shown in Figure 1, the sand mold structure of the bearing cover of the automobile engine system includes a sand mold body 1, a filter base 3, and a sprue cup 2. The filter base 3 is arranged at the bottom of the sprue cup 2, and the filter base 3 is connected to the first One end of the sprue 4 and the second sprue 6, the other end of the first sprue 4 is connected to the third sprue 5, the other end of the second sprue 6 is connected to the fourth sprue 7, and the sand mold body 1 is provided with a first casting cavity 23, a second casting cavity 26, a third casting cavity 25, a fourth casting cavity 24, and a fifth casting cavity 27,

The first casting cavity 23 is sequentially connected to the first molten iron hot riser 18, the first hot riser inner runner 13, and the first sprue 4, and the other side of the first casting cavity 23 is connected to the first side in turn. Inner runner 8, the first straight runner 4;

The second casting cavity 26 is sequentially connected to the second molten iron hot riser 21, the second hot riser inner runner 16, and the third sprue 5, and the other side of the second casting cavity 26 is connected to the second side in turn. Inner runner 11, third sprue 5;

The third casting cavity 25 is sequentially connected to the third molten iron hot riser 20, the third hot riser inner runner 15, and the first sprue 4, and the other side of the third casting cavity 25 is connected to the third side in turn. Ingate 10, third sprue 5;

The fourth casting cavity 24 is sequentially connected to the fourth molten iron inlet hot riser 19, the fourth hot riser inner runner 14, and the second sprue 6, and the other side of the fourth casting cavity 24 is connected to the fourth side in turn Inner runner 9, second sprue 6;

The fifth casting cavity 27 is sequentially connected to the fifth molten iron hot riser 22, the fifth hot riser inner runner 17, and the fourth sprue 7, and the other side of the fifth casting cavity 27 is connected to the fifth side in turn Ingate 12, the fourth sprue 7.

Further, the first sprue 4 , the second sprue 6 , the third sprue 5 and the fourth sprue 7 are arranged on the side of the bearing cap.

Further, the first hot riser inner runner 13, the second hot riser inner runner 16, the third hot riser inner runner 15, the fourth hot riser inner runner 14, and the fifth hot riser inner runner 17 respectively adopt thin sheet Lap into molten iron.

Further, the first side inrunner 8, the second side inrunner 11, the third side inrunner 10, the fourth side inrunner 9, and the fifth side inrunner 12 respectively adopt lamellar type overlapping into molten iron .

Further, the side of the bearing cover is provided with an air outlet piece 28, and the first casting cavity 23, the second casting cavity 26, the third casting cavity 25, the fourth casting cavity 24, and the fifth casting cavity 27 overlap the air outlet respectively. slice 28.

Further, the cross-sectional areas of the first sprue 4 , the second sprue 6 , the third sprue 5 , and the fourth sprue 7 are 330, 240, 200, and 140 mm ² , respectively.

Further, the cross-sectional areas of the first hot riser inrunner 13, the second hot riser inrunner 16, the third hot riser inrunner 15, the fourth hot riser inrunner 14, and the fifth hot riser inrunner 17 are respectively 120, 90, 100, 120, 90mm ² .

Further, the cross-sectional areas of the first side runner 8, the second side runner 11, the third side runner 10, the fourth side runner 9, and the fifth side runner 12 are respectively 100, 80, 90, 100, 80mm ² .

Further, the first molten iron inlet thermal riser 18, the second molten iron inlet thermal riser 21, the third molten iron thermal riser 20, the fourth molten iron thermal riser 19, the fifth molten iron thermal riser The ports 22 each have a volume of 270 cm ³ . The modulus is 16mm.

In this embodiment, it is further improved that the molten iron hot riser communicates with the cavity through the riser neck structure, the casting modulus is 7.9mm (modulus=volume/surface area), and the molten iron hot riser modulus is 16.5mm , the modulus of the molten iron hot riser neck structure is 11mm, which can meet the internal shrinkage requirements of castings. It adopts an asymmetrical gating system design, with 2 and 3 cavities arranged on both sides, and the inner sprue is designed in thin slices and Placed on the side of the bearing cover, the bearing cover is designed with an air outlet to achieve the purpose of improving process yield, ensuring product quality, and improving production efficiency.

Using the cast body of the sand mold structure of the bearing cap of the automobile engine system provided in this example, the process yield rate is increased from 49% to about 56%; the riser and the inrunner are lapped by thin slices, which can not only buffer the molten iron, but also reduce the risk of sand washing , which is also beneficial to the feeding of the hot riser. At the same time, the side of the iron-feeding inner runner can make full use of the sand mold space compared with the bottom-feeding iron, and can buffer the sand washing risk of the bottom-feeding iron. Adding an air outlet piece to the cavity body can It helps exhaust and reduces the air hole defects of the bearing cap. After adopting this process, the internal appearance defects and waste products are greatly reduced; the production efficiency is increased by 25% compared with the arrangement of 4 cavities, which not only improves the process yield, ensures product quality, but also reduces waste products. rate, improving production efficiency.

To sum up, the molten iron hot riser of the sand mold structure provided in this example adopts a spherical design, and an iron-feeding inner runner is placed on the side, and an asymmetric gating system design is adopted, and two and three cavities are respectively arranged on both sides. The sprue is designed in thin slices and placed on the side of the bearing cover, the bearing cover is designed with air sheets, the flow resistance of the gating system, the iron feeding method and the riser design are reasonable, so as to achieve the purpose of improving the process yield, ensuring product quality and improving production efficiency; effectively overcome It overcomes the deficiencies in the original process (process yield, production efficiency and appearance defects, etc.) and has high industrial application value.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. any such actual relationship or order exists between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above description is only the specific implementation of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, some improvements and modifications can also be made. It should be regarded as the protection scope of this application.

Claims (9)

1. A sand mold structure of an automobile engine system bearing cover, characterized in that it comprises a sand mold body, a filter base, and a sprue cup, and the filter base is arranged at the bottom of the sprue cup, and the filter base is respectively connected At one end of the first sprue and the second sprue, the other end of the first sprue is connected to the third sprue, and the other end of the second sprue is connected to the fourth sprue, and the other end of the second sprue is connected to the fourth sprue. The sand mold body is provided with a first casting cavity, a second casting cavity, a third casting cavity, a fourth casting cavity, and a fifth casting cavity, The first casting cavity is sequentially connected to the first molten iron hot riser, the first hot riser inner runner, and the first straight runner, and the other side of the first casting cavity is sequentially connected to the first side surface Sprue, the first straight sprue; The second casting cavity is sequentially connected to the second molten iron hot riser, the second hot riser inner runner, and the third sprue, and the other side of the second casting cavity is sequentially connected to the second side surface Sprue, third sprue; The third casting cavity is sequentially connected to the third molten iron hot riser, the third hot riser inner runner, and the first straight runner, and the other side of the third casting cavity is sequentially connected to the third side surface Sprue, third sprue; The fourth casting cavity is sequentially connected to the fourth molten iron hot riser, the fourth hot riser inner runner, and the second sprue, and the other side of the fourth casting cavity is sequentially connected to the fourth side Sprue, second sprue; The fifth casting cavity is sequentially connected to the fifth molten iron hot riser, the fifth hot riser inner runner, and the fourth sprue, and the other side of the fifth casting cavity is sequentially connected to the fifth side Sprue, the fourth sprue. 2. The sand mold structure of the automobile engine system bearing cap according to claim 1, wherein the first sprue, the second sprue, the third sprue, and the fourth sprue are arranged on the side of the bearing cover. 3. The sand mold structure of the automobile engine system bearing cap according to claim 1, characterized in that, the first hot riser inrunner, the second hot riser inrunner, the third hot riser inrunner, the fourth hot riser inrunner, The inner runner of the hot riser and the inner runner of the fifth hot riser are respectively lapped into the molten iron in thin slices. 4. The sand mold structure of the automobile engine system bearing cap according to claim 1, characterized in that, the first side inner runner, the second side inner runner, the third side inner runner, the fourth side inner runner The runner and the fifth side inrunner are respectively lapped into the molten iron in thin slices. 5. The sand mold structure of the bearing cap of the automobile engine system according to claim 1, characterized in that, the side of the bearing cap is provided with an air outlet sheet, and the first casting cavity, the second casting cavity, and the third casting mold cavity, the fourth casting cavity, and the fifth casting cavity respectively overlap the air outlet sheet. 6. The sand mold structure of the bearing cap of the automobile engine system according to claim 1, wherein the cross-sectional areas of the first sprue, the second sprue, the third sprue, and the fourth sprue are respectively 330, 240, 200, 140mm ² . 7. The sand mold structure of the automobile engine system bearing cap according to claim 1, characterized in that, the first hot riser inrunner, the second hot riser inrunner, the third hot riser inrunner, the fourth hot riser inrunner, The cross-sectional areas of the inner runner of the hot riser and the inner runner of the fifth hot riser are 120, 90, 100, 120, and 90 mm ² respectively. 8. The sand mold structure of the automobile engine system bearing cap according to claim 1, characterized in that, the first side inner runner, the second side inner runner, the third side inner runner, the fourth side inner runner The cross-sectional areas of the runner and the fifth side inner runner are 100, 80, 90, 100 and 80 mm ² respectively. 9. The sand mold structure of the bearing cap of the automobile engine system according to claim 1, characterized in that, the first thermal riser for molten iron, the second thermal riser for molten iron, and the third thermal riser for molten iron , the volume of the fourth molten iron hot riser and the fifth molten iron hot riser are respectively 270cm ³ , and the modulus is 16mm.