CN113894253A - Casting process adopting hollow metal mold core and hollow metal part - Google Patents
Casting process adopting hollow metal mold core and hollow metal part Download PDFInfo
- Publication number
- CN113894253A CN113894253A CN202111125699.0A CN202111125699A CN113894253A CN 113894253 A CN113894253 A CN 113894253A CN 202111125699 A CN202111125699 A CN 202111125699A CN 113894253 A CN113894253 A CN 113894253A
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- hollow metal
- casting
- core
- mold core
- hollow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/101—Permanent cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention is suitable for the field of metal casting, and provides a casting process adopting a hollow metal insert and a hollow metal part, wherein the process comprises the following steps: preparing a hollow metal mold core; placing and positioning the hollow metal mold core in a casting mold; and injecting liquid metal into the casting mould, coating the hollow metal mould core with the liquid metal, and cooling to obtain a hollow metal product. According to the casting process adopting the hollow metal mold core, the hollow metal mold core can be a thin-wall part which is convenient to process and manufacture, and the liquid metal is coated on the outer surface of the hollow metal mold core for forming, so that the hollow metal part is obtained, the structural strength is high, the quality is small, the inertia is small, the process is simple and ingenious, a salt core is not required to be used, the defects that the process of dissolving the salt core with high pressure water is time-consuming and labor-consuming, the occupied area is small and the like are overcome, the problems that a machine and a mold are corroded and rusted by salt ions are solved, the production efficiency is high, and the production cost is low.
Description
Technical Field
The invention belongs to the field of metal casting, and particularly relates to a casting process adopting a hollow metal mold core and a hollow metal part.
Background
The hollow metal workpiece has the advantages of high structural strength, small inertia, light weight and the like, and is widely applied to the field of mechanical structures, such as cranks of crank mechanisms. In the existing high-pressure casting process, when a hollow metal workpiece is manufactured, a salt core or a sand core is generally used, the salt core is difficult to manufacture by high-temperature sintering, and the process of dissolving the salt core by high-pressure water is time-consuming and labor-consuming, and occupies a field. In addition, the machinery and molds that contact the salt core are prone to rust, and the production cost of the hollow castings is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a casting process adopting a hollow metal mold core and a hollow metal product, which have high production efficiency and low production cost.
The technical scheme of the invention is as follows: a casting process adopting a hollow metal mold core comprises the following steps:
preparing a hollow metal mold core;
placing and positioning the hollow metal mold core in a casting mold;
and injecting liquid metal into the casting mould, coating the hollow metal mould core with the liquid metal, and cooling to obtain a hollow metal product.
Specifically, the material of the hollow metal mold core is the same as or different from that of the liquid metal, the liquid metal is injected into the casting mold through pressure, and the casting mold is a metal pressure casting mold.
Specifically, the hollow metal mold core has one or two or more hollow closed inner cavities.
Specifically, the hollow metal mold core is internally provided with a reinforcing rib or a reinforcing column.
Specifically, the hollow metal mold core is formed by butting, embedding or welding at least two metal shells.
Specifically, the hollow metal mold core is placed into a positioning hole in the casting mold.
Specifically, the hollow metal mold core is provided with a positioning part used for being matched with a positioning structure in the mold.
Specifically, the positioning part is of a solid or hollow structure.
Specifically, the liquid metal is wrapped on the positioning portion to form a process lug, and the process lug is removed after the casting mold is opened.
The invention also provides a hollow metal product which is manufactured by adopting the casting process and comprises a hollow metal mold core layer formed by the hollow metal mold core and a casting material layer formed by solidifying the liquid metal covering the periphery of the hollow metal mold core.
The hollow metal mold core can be a thin-wall part which is convenient to process and manufacture, and the hollow metal part is obtained after the liquid metal is coated on the outer surface of the hollow metal mold core for molding.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic perspective view of a hollow metal core in a casting process using the hollow metal core according to an embodiment of the present invention;
FIG. 2 is a schematic plan view of a hollow metal core in a casting process using the hollow metal core according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a hollow metal part in a casting process using a hollow metal core according to an embodiment of the present invention;
fig. 4 is a perspective sectional view of a hollow metal part with a hollow metal core intact during a casting process using the hollow metal core according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 4, an embodiment of the present invention provides a casting process using a hollow metal mold core, including the following steps:
preparing a hollow metal mold core 100 with a hollow closed inner cavity;
placing and positioning the hollow metal mold core 100 within a mold cavity of a casting mold;
injecting liquid metal into the casting mold, coating the hollow metal mold core 100 with the liquid metal, cooling to obtain a hollow metal product 200, integrally coating the hollow metal mold core 100 into the hollow metal product 200 as a part of the hollow metal product 200, so that the hollow metal mold core 100 is designed and manufactured in advance, the hollow metal mold core 100 has a shape smaller than that of the hollow metal product 200, the liquid metal can be directly coated on the outer surface of the hollow metal mold core 100 after entering a mold cavity, the hollow metal mold core 100 can be in a shell shape, i.e. the hollow metal mold core 100 can be a thin-walled product which is convenient to process and manufacture, and the hollow metal product 200 is obtained after coating the outer surface of the hollow metal mold core 100 with the liquid metal for molding, has high structural strength, small mass and small inertia, and can be used in machinery and equipment with high-speed action, such as a driver, an engine and the like, the process is simple and ingenious, a salt core or a sand core is not needed, the defects that the process of dissolving the salt core in water under high pressure wastes time and labor, occupies a field and the like are overcome, the problem that machinery and a die are corroded and rusted by salt ions is solved, the production efficiency is high, and the production cost is low.
Specifically, the material of the hollow metal mold core 100 may be the same as the material of the liquid metal, that is, the material of the hollow metal part 200 is the same, so that the reliability is better. The material of the hollow metal mold core 100 may be different from the material of the liquid metal.
Specifically, the liquid metal is injected into the casting mold by pressure, and the casting mold is a metal die casting mold, that is, the liquid metal can be injected by high pressure die casting.
Specifically, the hollow metal mold core 100 has one or at least two (two or more) hollow closed inner cavities, and for larger or longer products, the inner cavities of the hollow metal mold core 100 can be separated in a segmented manner, so that the processing is convenient. Of course, if the size of the article is small, a hollow closed cavity may be used.
Specifically, the hollow metal mold core 100 may be provided with a reinforcing rib or a reinforcing column inside to prevent the surface of the hollow metal mold core 100 from collapsing under high temperature pressure, for example, when a flat hollow product is produced, the reinforcing rib or the reinforcing column may be welded inside the hollow metal mold core 100 to prevent the surface of the hollow metal mold core 100 from collapsing during high temperature die casting, which results in a quality higher than a standard range and a high finished product quality.
Specifically, the wall thickness of the hollow metal mold core 100 is less than 2mm, and the wall thickness of the hollow metal mold core 100 is generally less than 1mm, however, in specific applications, the wall thickness of the hollow metal mold core 100 may be set to other ranges, such as 3mm, 0.5mm, etc., according to the design.
Specifically, the hollow metal mold core 100 is generally formed by butt-jointing at least two metal shells and then welding (or integrally forming one metal shell), that is, the two metal shells may be butt-jointed, inlaid or welded. The metal shells may be stamped and formed, and typically two metal shells are butt-joined and then welded to obtain the hollow metal mold core 100. Can be provided with unsmooth matching location structure between two metal casing, one of them metal casing inner wall is provided with first reference column promptly, and another metal casing inner wall is provided with the second reference column, and the tip of first reference column and second reference column can be through the unsmooth structure matching and realize the location. The first positioning column and the second positioning column can play a role of reinforcing ribs or reinforcing columns after being connected, and the hollow metal mold core 100 can be prevented from collapsing. The two metal shells may also be rolled using a crimper or the like to produce the hollow metal mold core 100.
Specifically, hollow metal mold core 100 is put into the gas pocket has before the casting mould, just hollow metal mold core 100 is put into preheat the back before the casting mould and is sealed the gas pocket, hollow metal mold core 100 preheats the back, can balance inside and outside atmospheric pressure through the gas pocket, puts into the mould after sealing the gas pocket again, and it can avoid the influence of inside high pressure gas, prevents the defect because of hollow metal mold core 100 inside atmospheric pressure is too high and leads to. The temperature of the preheating is lower than the melting temperature of the hollow metal mold core 100. Of course, the air holes may not be provided, and the preheating may not be performed.
Specifically, the hollow metal mold core 100 is provided with a positioning portion 110 for cooperating with a positioning structure in a mold to prevent the liquid metal from displacing the hollow metal mold core 100 during the injection process, and the reliability is high.
Specifically, the hollow metal mold core 100 is placed into a locating hole in the casting mold.
Specifically, the positioning portion 110 may be a hollow structure, and in a specific application, after the casting is cooled and formed, the portion of the positioning portion 110 protruding from the surface of the casting is cut off, and the hole formed by cutting off the positioning portion 110 is welded by electric welding or the like, and is polished flat. Alternatively, as a possible alternative, the positioning portion 110 may be a solid structure, such as a metal rod, etc., which has high structural strength.
Specifically, the positioning portion 110 may be located at one side of the hollow metal mold core 100 and supported in the mold, and after the part is formed, when the positioning portion 110 protrudes out of the hollow metal part 200, a part of the positioning portion may be cut off or retained according to actual conditions. The positioning parts 110 may also be provided at appropriate positions such as both ends of the hollow metal mold core 100.
Specifically, the liquid metal may be wrapped in the positioning portion 110 to form a process lug, and after the casting mold is opened, the process lug is removed, that is, the process lug which is planned to be cut off is designed in advance, and the positioning portion 110 is a part of the process lug. Of course, the process ear may not be provided, and the positioning portion 110 may also be directly retained on the product (without affecting the use of the product).
In specific application, a structure such as a diversion trench or a diversion rib can be arranged on the surface of the hollow metal mold core 100. Of course, the surface of the hollow metal mold core 100 may also be of a smooth configuration.
The invention also provides a hollow metal product 200 which can be manufactured by adopting the casting process and comprises a hollow metal mold core layer formed by the hollow metal mold core 100 and a casting material layer formed by solidifying the liquid metal covering the periphery of the hollow metal mold core 100, wherein the hollow metal product 200 can be in a double-layer structure, the double-layer structure can be observed by the hollow metal product 200 after the hollow metal product is cut to the hollow metal mold core 100 in the double-layer structure, and certainly, the double-layer structure is not obvious (the layering is not obvious) and can not be identified by naked eyes due to the reasons that the temperature difference between the temperature of the hollow metal mold core 100 and the temperature of the liquid metal is not large during production and the like, namely the temperature difference is in a small range and the like, and the hollow metal product 200 also belongs to the protection range required by the invention.
According to the casting process adopting the hollow metal mold core and the hollow metal part, which are provided by the embodiment of the invention, the hollow metal mold core 100 can be a thin-wall part which is convenient to process and manufacture, and the hollow metal part 200 is obtained after the liquid metal is coated on the outer surface of the hollow metal mold core 100 for molding, so that the hollow metal part is high in structural strength, small in quality and small in inertia, can be used in machinery and equipment which act at a high speed, such as a driver, an engine and the like, is simple and ingenious in process, does not need to use a salt core, avoids the defects that the process of dissolving the salt core with high pressure water, wastes time and labor, occupies a field and the like, avoids the problems that the machinery and the mold are corroded and rusted by salt ions, and is high in production efficiency and low in production cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A casting process adopting a hollow metal mold core is characterized by comprising the following steps:
preparing a hollow metal mold core;
placing and positioning the hollow metal mold core in a casting mold;
and injecting liquid metal into the casting mould, coating the hollow metal mould core with the liquid metal, and cooling to obtain a hollow metal product.
2. The casting process of claim 1, wherein the hollow metal core is of the same or different material as the liquid metal, the liquid metal is injected into the casting mold by pressure, and the casting mold is a metal die casting mold.
3. The casting process of claim 1, wherein the hollow metal mold core has one or two or more hollow enclosed internal cavities.
4. The casting process according to claim 1, wherein the hollow metal core is internally provided with reinforcing ribs or columns.
5. The casting process according to claim 1, wherein the hollow metal core is formed by butt-jointing, inlaying or welding at least two metal shells.
6. The casting process of claim 1, wherein the hollow metal core is placed into a locating hole in the casting mold.
7. A casting process as claimed in claim 1, wherein the hollow metal core is provided with locating features for cooperating with locating features in the mould.
8. The casting process of claim 7, wherein the locating portion is a solid or hollow structure.
9. The casting process according to claim 8, wherein the liquid metal is coated on the positioning portion to form a process lug, and the process lug is removed after the casting mold is opened.
10. A hollow metal product is characterized by comprising a hollow metal mold core layer formed by a hollow metal mold core and a casting material layer formed by solidifying liquid metal covering the periphery of the hollow metal mold core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111125699.0A CN113894253A (en) | 2021-09-24 | 2021-09-24 | Casting process adopting hollow metal mold core and hollow metal part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111125699.0A CN113894253A (en) | 2021-09-24 | 2021-09-24 | Casting process adopting hollow metal mold core and hollow metal part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113894253A true CN113894253A (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111125699.0A Pending CN113894253A (en) | 2021-09-24 | 2021-09-24 | Casting process adopting hollow metal mold core and hollow metal part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115556825A (en) * | 2022-10-28 | 2023-01-03 | 中国第一汽车股份有限公司 | Hollow cast aluminum steering knuckle and suspension |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63260654A (en) * | 1987-04-15 | 1988-10-27 | Ube Ind Ltd | Placing core for pressure casting and pressure casting method using the same |
| CN103949588A (en) * | 2014-04-25 | 2014-07-30 | 西安航空动力股份有限公司 | Method for forming slender bent irregularly-shaped hole in aluminum alloy casting |
| WO2019022579A1 (en) * | 2017-07-28 | 2019-01-31 | 염주석 | Method for manufacturing wheel assembly |
| CN110125331A (en) * | 2019-05-17 | 2019-08-16 | 合肥江淮铸造有限责任公司 | A kind of shape casting technique of casting complicated inner cavity |
| EP3689494A1 (en) * | 2019-01-31 | 2020-08-05 | Hyundai Motor Company | Method of forming casting with flow passage, and casting formed by the same |
-
2021
- 2021-09-24 CN CN202111125699.0A patent/CN113894253A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63260654A (en) * | 1987-04-15 | 1988-10-27 | Ube Ind Ltd | Placing core for pressure casting and pressure casting method using the same |
| CN103949588A (en) * | 2014-04-25 | 2014-07-30 | 西安航空动力股份有限公司 | Method for forming slender bent irregularly-shaped hole in aluminum alloy casting |
| WO2019022579A1 (en) * | 2017-07-28 | 2019-01-31 | 염주석 | Method for manufacturing wheel assembly |
| EP3689494A1 (en) * | 2019-01-31 | 2020-08-05 | Hyundai Motor Company | Method of forming casting with flow passage, and casting formed by the same |
| CN110125331A (en) * | 2019-05-17 | 2019-08-16 | 合肥江淮铸造有限责任公司 | A kind of shape casting technique of casting complicated inner cavity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115556825A (en) * | 2022-10-28 | 2023-01-03 | 中国第一汽车股份有限公司 | Hollow cast aluminum steering knuckle and suspension |
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