CN115319026B - Exhaust molding method for aluminum alloy investment pattern antigravity casting shell - Google Patents
Exhaust molding method for aluminum alloy investment pattern antigravity casting shell Download PDFInfo
- Publication number
- CN115319026B CN115319026B CN202210902576.1A CN202210902576A CN115319026B CN 115319026 B CN115319026 B CN 115319026B CN 202210902576 A CN202210902576 A CN 202210902576A CN 115319026 B CN115319026 B CN 115319026B
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- CN
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- Prior art keywords
- casting
- exhaust
- mould
- shell
- aluminum alloy
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- 238000005266 casting Methods 0.000 title claims abstract description 74
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000000465 moulding Methods 0.000 title claims description 6
- 239000010425 asbestos Substances 0.000 claims abstract description 9
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005058 metal casting Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 229910001338 liquidmetal Inorganic materials 0.000 abstract 1
- 239000007769 metal material Substances 0.000 abstract 1
- 238000005495 investment casting Methods 0.000 description 3
- 238000009415 formwork Methods 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 206010006322 Breath holding Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Silencers (AREA)
Abstract
The application belongs to the technical field of metal casting, and particularly relates to an aluminum alloy investment antigravity casting shell exhaust and filling method. The method comprises the following steps of S1, pressing an exhaust runner with stepped exhaust by adopting a die; s2, sticking the exhaust runner above a casting wax mould for forming a casting after the pouring system is prepared; s3, manufacturing and dewaxing a casting wax pattern carrying an exhaust runner, wherein a casting cavity in the mould is corresponding to the casting wax pattern before dewaxing, and an exhaust channel in the mould is corresponding to the exhaust runner before dewaxing; s4, asbestos is plugged into the exhaust channel for plugging; s5, pouring aluminum alloy metal liquid into the mould shell from a water filling port below the mould shell. The casting mold has the advantages that the exhaust effect of the casting mold can be guaranteed, the phenomenon of insufficient casting of the casting mold after casting is difficult to occur, meanwhile, the problem of aluminum liquid metal material running can be effectively solved by adopting an asbestos plugging mode, and finally, a qualified casting is obtained.
Description
Technical Field
The application belongs to the technical field of metal casting, and particularly relates to an aluminum alloy investment antigravity casting shell exhaust and filling method.
Background
The aluminum alloy investment castings are various in variety, complex and changeable in structure, and higher in requirements on internal metallurgical quality and usability, and the problems of slag inclusion, looseness and the like of the castings are solved by adopting antigravity investment casting, so that the performance of the castings is obviously improved, and the casting shells are made of silica sol.
Aiming at aluminum alloy investment antigravity casting, the conventional investment silica sol is adopted for manufacturing the shell, and the following problems can occur in the casting production process:
1) The surface precision of the casting can be ensured by the silica sol shell making, but the poor air permeability and unsmooth exhaust can generate a breath holding phenomenon in the casting process, so that the casting, especially the thin-wall part, is difficult to form, and repair and scrapping cannot be carried out in the later stage because of the complicated investment piece;
2) The vent holes are drilled on the upper part of the mould shell in a conventional mode, so that the operability of easily dropping the shell is low, internal slag inclusion is formed in the casting process, meanwhile, after the vent holes are opened, the fluidity of the aluminum alloy metal liquid is good, and the mould shell is easily impacted to cause waste.
Disclosure of Invention
In order to solve the problems, the application provides an aluminum alloy investment pattern antigravity casting shell exhaust filling method, which aims at the problems of under casting and flame running existing in the conventional method for opening holes, improves the casting mold exhaust structure, solves the technical problems of exhaust and flame running (material), and achieves the purpose of obtaining qualified castings.
The application discloses an aluminum alloy investment antigravity casting shell exhaust and mold filling method mainly comprises the following steps:
step S1, adopting a die to press an exhaust runner with stepped exhaust;
s2, sticking the exhaust runner above a casting wax mould for forming a casting after the pouring system is prepared;
s3, manufacturing and dewaxing a casting wax pattern carrying an exhaust runner, wherein a casting cavity in the mould is corresponding to the casting wax pattern before dewaxing, and an exhaust channel in the mould is corresponding to the exhaust runner before dewaxing;
s4, asbestos is plugged into the exhaust channel for plugging;
s5, pouring aluminum alloy metal liquid into the mould shell from a water filling port below the mould shell.
Preferably, in step S2, a plurality of the exhaust runners are provided, and the plurality of exhaust runners are uniformly adhered directly above the casting wax pattern.
Preferably, in step S2, the exhaust runner includes a plurality of stepped cylindrical portions in an axial direction, and the diameter of the cylindrical portion near the mold wax pattern is the largest and the diameter of the cylindrical portion far from the mold wax pattern is the smallest.
Preferably, the exhaust runner is provided with two sections of cylinders along the axial direction, the cylinder with the larger inner diameter is adhered to the casting wax mould, and a step surface is formed between the two sections of cylinders.
Preferably, the step surface is a tapered surface.
Preferably, in step S3, the formwork is made of an investment silica sol.
The exhaust runner formed by the method is high in operability, the exhaust effect of the casting mold can be guaranteed by bonding different quantities of exhaust runners along with different structures of the casting mold, the phenomenon of incomplete casting of the casting mold is difficult to occur after casting, meanwhile, the problem of aluminum liquid material running can be effectively solved by adopting an asbestos plugging mode, and finally qualified castings are obtained.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the aluminum alloy investment antigravity casting shell exhaust gas filling method of the present application.
FIG. 2 is a schematic illustration of a mold shell construction made by the aluminum alloy investment antigravity casting mold shell exhaust filling method of the present application.
FIG. 3 is an enlarged schematic view of the exhaust passage of the embodiment of FIG. 2 of the present application.
Wherein, 1-mold cavity, 2-exhaust passage, 3-runner.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the following describes the technical solutions in the embodiments of the present application in more detail with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The application provides an aluminum alloy investment antigravity casting shell exhaust filling method, which mainly comprises the following steps as shown in fig. 1:
step S1, adopting a die to press an exhaust runner with stepped exhaust;
s2, sticking the exhaust runner above a casting wax mould for forming a casting after the pouring system is prepared;
s3, manufacturing and dewaxing a casting wax pattern carrying an exhaust runner, wherein a casting cavity in the mould is corresponding to the casting wax pattern before dewaxing, and an exhaust channel in the mould is corresponding to the exhaust runner before dewaxing;
s4, asbestos is plugged into the exhaust channel for plugging;
s5, pouring aluminum alloy metal liquid into the mould shell from a water filling port below the mould shell.
According to the casting mold, the stepped exhaust port is additionally formed in the upper portion of the casting mold, the special compression mold is used for pressing the exhaust wax mold to form the exhaust runner, the exhaust runner is adhered to the casting wax mold and then is subjected to shell manufacturing dewaxing, the exhaust port is opened by using asbestos to block, the exhaust effect is kept, and then a casting is cast according to the conventional production procedure.
In some alternative embodiments, in step S2, the number of the exhaust runners is plural, and the plural exhaust runners are uniformly adhered directly above the casting wax pattern. As shown in fig. 2, the final step-shaped exhaust passages 2 are provided in plural numbers, and the plural exhaust passages 2 are arranged side by side above the mold cavity 1 corresponding to the mold wax pattern.
In some alternative embodiments, in step S2, the exhaust runner includes a plurality of stepped cylindrical portions in an axial direction, and the cylindrical portion near the mold wax pattern has a largest diameter and the cylindrical portion far from the mold wax pattern has a smallest diameter.
In some alternative embodiments, the exhaust runner has two sections of cylinders in the axial direction, the larger inner diameter cylinder being bonded to the casting wax pattern, the two sections of cylinders forming a step surface therebetween. Fig. 3 shows a structure with two sections of cylinders, corresponding channels of the two sections of cylinders are connected through steps, and the steps can be designed to be plane or inclined, namely, the step surfaces are conical surfaces.
In some alternative embodiments, in step S3, the formwork is made using an investment silica sol.
It should be noted that the application adopts antigravity investment casting, aluminum alloy molten metal enters the molding cavity 1 from the pouring gate 3 below the mold shell, and gas is exhausted through the exhaust channel 2, so that sundries can be effectively prevented from falling into the molding cavity through asbestos, and the problem of material leakage of the aluminum alloy molten metal can be solved.
The exhaust runner formed by the method is high in operability, the exhaust effect of the casting mold can be guaranteed by bonding different quantities of exhaust runners along with different structures of the casting mold, the phenomenon of incomplete casting of the casting mold is difficult to occur after casting, meanwhile, the problem of aluminum liquid material running can be effectively solved by adopting an asbestos plugging mode, and finally qualified castings are obtained.
While the application has been described in detail with respect to the general description and the specific embodiments thereof, it will be apparent to those skilled in the art that certain modifications and improvements can be made thereto based upon the application. Accordingly, such modifications or improvements may be made without departing from the spirit of the application and are intended to be within the scope of the invention as claimed.
Claims (3)
1. An aluminum alloy investment antigravity casting shell exhaust filling method is characterized by comprising the following steps:
step S1, adopting a die to press an exhaust runner with stepped exhaust;
s2, sticking the exhaust runner above a casting wax mould for forming a casting after the pouring system is prepared;
s3, manufacturing and dewaxing a casting wax pattern carrying an exhaust runner, wherein a casting cavity in the mould is corresponding to the casting wax pattern before dewaxing, and an exhaust channel in the mould is corresponding to the exhaust runner before dewaxing;
s4, asbestos is plugged into the exhaust channel for plugging;
s5, pouring aluminum alloy metal liquid into the mould shell from a water filling port below the mould shell;
in step S2, the plurality of exhaust runners are uniformly adhered right above the casting wax pattern, the exhaust runners axially comprise two sections of stepped cylinder parts, the diameter of the cylinder part close to the casting wax pattern is large, the diameter of the cylinder part far away from the casting wax pattern is small, the cylinder with the larger inner diameter is adhered to the casting wax pattern, and a step surface is formed between the two sections of cylinders.
2. The aluminum alloy investment antigravity casting shell exhaust gas molding method of claim 1, wherein the step surface is a tapered surface.
3. The method for exhaust gas molding of an aluminum alloy investment antigravity casting shell according to claim 1, wherein in step S3, the mold shell is made of an investment silica sol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210902576.1A CN115319026B (en) | 2022-07-29 | 2022-07-29 | Exhaust molding method for aluminum alloy investment pattern antigravity casting shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210902576.1A CN115319026B (en) | 2022-07-29 | 2022-07-29 | Exhaust molding method for aluminum alloy investment pattern antigravity casting shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115319026A CN115319026A (en) | 2022-11-11 |
| CN115319026B true CN115319026B (en) | 2024-01-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210902576.1A Active CN115319026B (en) | 2022-07-29 | 2022-07-29 | Exhaust molding method for aluminum alloy investment pattern antigravity casting shell |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101690976A (en) * | 2008-01-08 | 2010-04-07 | 刘玉满 | Method for eliminating carbon defects by adopting high-performance coating, negative-pressure firing, vacant shell pouring and quick airflow cooling in lost foam casting |
| CN102205394A (en) * | 2011-04-28 | 2011-10-05 | 江苏标新久保田工业有限公司 | Hot investment casting method for electric heating element |
| CN103042170A (en) * | 2011-10-14 | 2013-04-17 | 吴江市液铸液压件铸造有限公司 | Exhaust plug for exhaust hole of grinding ball casting mold |
| CN103722127A (en) * | 2013-12-31 | 2014-04-16 | 陕西恒通智能机器有限公司 | Rapid investment casting method based on stereolithography (SL) |
| CN104399885A (en) * | 2014-10-28 | 2015-03-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for increasing permeability of investment cast ceramic shell |
| CN206492901U (en) * | 2017-02-27 | 2017-09-15 | 甘肃机电职业技术学院 | A kind of new investment casting mold |
| CN112317692A (en) * | 2020-11-03 | 2021-02-05 | 西北工业大学 | Pouring system for casting alloy standard sample and manufacturing method of formwork |
-
2022
- 2022-07-29 CN CN202210902576.1A patent/CN115319026B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101690976A (en) * | 2008-01-08 | 2010-04-07 | 刘玉满 | Method for eliminating carbon defects by adopting high-performance coating, negative-pressure firing, vacant shell pouring and quick airflow cooling in lost foam casting |
| CN102205394A (en) * | 2011-04-28 | 2011-10-05 | 江苏标新久保田工业有限公司 | Hot investment casting method for electric heating element |
| CN103042170A (en) * | 2011-10-14 | 2013-04-17 | 吴江市液铸液压件铸造有限公司 | Exhaust plug for exhaust hole of grinding ball casting mold |
| CN103722127A (en) * | 2013-12-31 | 2014-04-16 | 陕西恒通智能机器有限公司 | Rapid investment casting method based on stereolithography (SL) |
| CN104399885A (en) * | 2014-10-28 | 2015-03-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for increasing permeability of investment cast ceramic shell |
| CN206492901U (en) * | 2017-02-27 | 2017-09-15 | 甘肃机电职业技术学院 | A kind of new investment casting mold |
| CN112317692A (en) * | 2020-11-03 | 2021-02-05 | 西北工业大学 | Pouring system for casting alloy standard sample and manufacturing method of formwork |
Non-Patent Citations (1)
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| 罗启全.《简易模具设计与制造》.广东科技出版社,2004,第281-282页. * |
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| CN115319026A (en) | 2022-11-11 |
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