CN112589045A - Preparation method of casting die - Google Patents
Preparation method of casting die Download PDFInfo
- Publication number
- CN112589045A CN112589045A CN202011282382.3A CN202011282382A CN112589045A CN 112589045 A CN112589045 A CN 112589045A CN 202011282382 A CN202011282382 A CN 202011282382A CN 112589045 A CN112589045 A CN 112589045A
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- casting
- model
- wax injection
- models
- mold
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- 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
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- 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
- B22C9/043—Removing the consumable pattern
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a preparation method of a casting die, which comprises the following steps: manufacturing a casting model which comprises a gate tree and at least two part models; equally dividing the casting model into at least two casting models along an axis, wherein the structure of each casting model is consistent, and each casting model comprises an equally divided gate tree and at least one complete part model; manufacturing a metal mould for wax injection according to the casting model; manufacturing a wax injection model; re-combining the wax injection models into a casting model; carrying out slurry dipping and drying treatment on the casting model to obtain a high-temperature-resistant shell mold for casting; dewaxing; sintering; casting; performing shell vibration and shot blasting on the cast shell mold to obtain a casting and a casting rod; and cutting and separating the casting and the pouring bar by using automatic cutting, grinding the pouring gate of the casting, and carrying out sand blasting to obtain a blank of the product. The method greatly improves the processing efficiency, shortens the processing time and reduces the cost.
Description
Technical Field
The invention relates to a casting method, in particular to a preparation method of a casting die.
Background
The existing precision casting process comprises the following steps: wax pressing (wax injection to prepare a wax pattern), wax repairing, wax inspection, tree grouping (wax pattern group tree), shell making (slurry dipping, sand spraying, slurry dipping, and mold shell air drying), dewaxing (steam dewaxing), mold shell roasting, chemical analysis, pouring (pouring molten steel in the mold shell), vibration shell removing, casting and casting bar cutting and separation, gate grinding, primary inspection (blank inspection), shot blasting cleaning, machining, polishing, finished product inspection and warehousing.
The existing precision casting has more procedures, longer required time and higher cost.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a casting die, which has the advantages of less working procedures, short required time and low cost, and the specific technical scheme is as follows:
a method for preparing a casting die comprises the following steps:
s110, designing a casting model according to the part, wherein the casting model comprises a gate tree and at least two part models;
s120, equally dividing the casting model into at least two casting models along the axis of the gate tree, wherein the structure of each casting model is consistent, and each casting model comprises the equally divided gate tree and at least one complete part model;
s130, manufacturing a metal mold for wax injection according to the divided casting model;
s140, manufacturing a wax injection model by using a metal mold for wax injection;
s150, combining at least two wax injection models into a casting model again along the previously divided axis;
s160, carrying out slurry dipping and drying treatment on the casting model, and repeating slurry dipping and drying for 4-8 times according to shell molds with different thicknesses required by the part structure to obtain a high-temperature-resistant shell mold for casting;
s170, dewaxing a castable high-temperature-resistant shell mold by using a dewaxing furnace;
s180, sintering the high-temperature-resistant shell mold for casting, and removing residual wax in the shell mold;
s190, preheating a castable high-temperature-resistant shell mold, casting molten metal into the high-temperature-resistant shell mold from a sprue, and then cooling and forming;
s200, performing shell vibration and shot blasting on the cast shell mold to obtain a casting and a casting rod;
s210, cutting and separating the casting and the casting bar by using automatic cutting, grinding a gate of the casting, and performing sand blasting to obtain a blank of the product.
By adopting the technical scheme, the pouring gate tree comprises the pouring cup and the pouring gate, the pouring cup is communicated with the pouring gate, and the casting is arranged on the pouring gate.
The casting model is related to the size which can be achieved by the wax injection mould and the number which can be completed at most in the casting process according to the size of the part, the casting model is equally divided after the casting model is designed, the wax injection mould manufactured in the way is small, the cost is low, the wax mould is not required to be welded on a pouring gate tree in the later period, the step of welding the wax mould is omitted, namely, the step of tree combination is omitted, and the time is shortened.
Further, in the step S150, the wax injection mold is placed on the fixture and welded together.
Further, the casting and the casting bar are placed on the jig and divided in the step S210.
Compared with the prior art, the invention has the following beneficial effects:
according to the preparation method of the casting die, the integral structure of the sprue tree and the wax die is completed through wax injection at one time, the sprue tree and the wax die are welded together in the later period, automatic cutting is facilitated after casting, the machining efficiency is greatly improved, the machining time is shortened, and the cost is reduced.
Drawings
FIG. 1 is a front view of a casting mold according to the first embodiment;
FIG. 2 is a top view of the casting mold of the first embodiment;
FIG. 3 is a front view of the wax injection mold of the first embodiment;
FIG. 4 is a top view of the wax injection mold of the first embodiment;
FIG. 5 is a front view of a casting mold of the second embodiment;
FIG. 6 is a plan view of a casting mold of the second embodiment;
fig. 7 is a top view of the wax injection mold of the second embodiment.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1 to 7, a method for manufacturing a casting mold includes the steps of:
s110, designing a casting model according to the part, wherein the casting model comprises a gate tree 1 and at least two part models 2;
s120, dividing the casting model into at least two casting models in equal parts along the axis of the gate tree 1, wherein the structure of each casting model is consistent, and each casting model comprises the gate tree 1 divided in equal parts and at least one complete part model 2;
s130, manufacturing a metal mold for wax injection according to the divided casting model;
s140, manufacturing a wax injection model by using a metal mold for wax injection;
s150, combining at least two wax injection models into a casting model again along the previously divided axis;
s160, carrying out slurry dipping and drying treatment on the casting model, and repeating slurry dipping and drying for 4-8 times according to shell molds with different thicknesses required by the part structure to obtain a high-temperature-resistant shell mold for casting;
s170, dewaxing a castable high-temperature-resistant shell mold by using a dewaxing furnace;
s180, sintering the high-temperature-resistant shell mold for casting, and removing residual wax in the shell mold;
s190, preheating a castable high-temperature-resistant shell mold, casting molten metal into the high-temperature-resistant shell mold from a sprue, and then cooling and forming;
s200, performing shell vibration and shot blasting on the cast shell mold to obtain a casting and a casting rod;
s210, cutting and separating the casting and the casting bar by using automatic cutting, grinding a gate of the casting, and performing sand blasting to obtain a blank of the product.
The pouring tree 1 comprises a pouring cup 11 and a pouring channel 12, the pouring cup 11 is communicated with the pouring channel 12, and the part model 2 is arranged on the pouring channel 12.
The gate tree 1 is provided with a plurality of part models 2 along the axis, and the part models 2 on the gate tree 1 are also arranged in an annular array along the axis of the gate tree 1.
The equally divided gate trees 1 can be spliced into a complete gate tree 1.
The casting model is related to the size which can be reached by the wax injection mould and the number of castings which can be completed at most during casting according to the size of a part, the casting model is equally divided into a plurality of wax injection models after the casting model is designed, and the wax injection models are in an axisymmetric structure, so that the wax injection mould manufactured by the wax injection models is small and low in cost, the part model 2 is not required to be welded on the sprue tree 1 in the later period, the step of welding the part model 2 is omitted, namely, the step of assembling the tree is omitted, and the time is shortened.
In the prior art, when the tree is assembled, a plurality of part models 2 need to be manually welded on a gate tree 1, and the gate tree 1 is formed by wax injection in advance. Because the part models 2 are more in number, particularly wax of small parts, the welding of the part models 2 requires a plurality of workers, and requires more fields and turnover equipment, so that the welding time is long; meanwhile, as the positions of the part models 2 which are manually welded are not uniform, the castings and the casting bars need to be manually cut in the later period.
According to the invention, the air inlet of the casting model is equally divided to obtain the axisymmetric shooting part model 2 cores, and then the axisymmetric shooting part model 2 cores are welded to form the complete casting model, so that the processes of manufacturing the gate tree 1, manufacturing the part model 2, welding the part model 2 to the gate tree 1 and the like are omitted, the working procedures are greatly reduced, the production efficiency is improved, and the production cost is reduced. Meanwhile, as the shell mold structure formed by the casting mold is basically the same in size, no matter the casting, the vibration shelling, the cutting separation of the casting and the casting bar, the grinding of the sprue and the like in the later period can adopt automatic equipment, the integral production efficiency can be effectively improved, and the cost is reduced. In the prior art, as the positions of the manually welded part models 2 are uniformly distributed and the same, the casting model cannot be placed in a clamping manner for automatic production, and the pouring tree 1 and the part models 2 are integrally molded, so that the consistency of the size is ensured, and the automatic water inlet production is facilitated.
In step S150, the wax injection mold is placed on a jig and welded together.
The wax injection model is placed on the fixture for welding more conveniently, and the size of the welded casting model is consistent.
In step S210, the casting and the casting bar are placed on a jig and divided.
The casting and the casting bar are conveniently cut above the clamp, so that the cutting efficiency can be improved.
Example one
As shown in fig. 1 and 2, the part models 2 are symmetrically located at two sides of the gate tree 1, three or more part models 2 are arranged at one side of the gate tree 1, and as shown in fig. 3 and 4, the casting model is symmetrically divided into two wax injection models, and the wax injection mold is manufactured according to one of the wax injection models.
Example two
As shown in fig. 5 to 7, four runners 12 and the part molds 2 are arranged in an annular array around the axis of the gate tree 1 and are divided equally along the axis to form four axisymmetric wax injection molds, and the wax injection mold is manufactured according to one of the wax injection molds.
The runners 12 and part molds 2 are arranged in an annular array along the axis of the gate tree 1, the number being determined according to design requirements.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (3)
1. A method for preparing a casting die is characterized by comprising the following steps:
s110, designing a casting model according to the part, wherein the casting model comprises a gate tree and at least two part models;
s120, equally dividing the casting model into at least two casting models along the axis of the gate tree, wherein the structure of each casting model is consistent, and each casting model comprises the equally divided gate tree and at least one complete part model;
s130, manufacturing a metal mold for wax injection according to the divided casting model;
s140, manufacturing a wax injection model by using a metal mold for wax injection;
s150, combining at least two wax injection models into a casting model again along the previously divided axis;
s160, carrying out slurry dipping and drying treatment on the casting model, and repeating slurry dipping and drying for 4-8 times according to shell molds with different thicknesses required by the part structure to obtain a high-temperature-resistant shell mold for casting;
s170, dewaxing a castable high-temperature-resistant shell mold by using a dewaxing furnace;
s180, sintering the high-temperature-resistant shell mold for casting, and removing residual wax in the shell mold;
s190, preheating a castable high-temperature-resistant shell mold, casting molten metal into the high-temperature-resistant shell mold from a sprue, and then cooling and forming;
s200, performing shell vibration and shot blasting on the cast shell mold to obtain a casting and a casting rod;
s210, cutting and separating the casting and the casting bar by using automatic cutting, grinding a gate of the casting, and performing sand blasting to obtain a blank of the product.
2. A method of producing a casting die according to claim 1,
in the step S150, at least two wax injection models are placed on the jig and combined together.
3. A method of producing a casting die according to claim 1,
in the step S210, the casting and the casting bar are placed on a clamp for automatic division.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011282382.3A CN112589045A (en) | 2020-11-17 | 2020-11-17 | Preparation method of casting die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011282382.3A CN112589045A (en) | 2020-11-17 | 2020-11-17 | Preparation method of casting die |
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| CN112589045A true CN112589045A (en) | 2021-04-02 |
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| CN202011282382.3A Pending CN112589045A (en) | 2020-11-17 | 2020-11-17 | Preparation method of casting die |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0255639A (en) * | 1988-08-19 | 1990-02-26 | Mazda Motor Corp | Manufacture of wax pattern in lost wax casting |
| CN103706759A (en) * | 2013-12-27 | 2014-04-09 | 惠东县吉邦五金制品有限公司 | Precision cast wax module tree structure |
| CN206732048U (en) * | 2017-04-28 | 2017-12-12 | 连云港源钰金属制品有限公司 | A kind of modified form hot investment casting wax tree structure |
| CN108672653A (en) * | 2018-06-08 | 2018-10-19 | 泰州市博世特精密铸造有限公司 | Casting method applied to automobile engine cylinder head |
| CN208712779U (en) * | 2018-07-27 | 2019-04-09 | 深圳市科立达机械有限公司 | Model casting group tree construction |
| CN109773122A (en) * | 2019-02-19 | 2019-05-21 | 大成（常熟）机械有限公司 | A kind of production technology and valve castings of the model casting of valve castings |
| CN110090923A (en) * | 2019-05-22 | 2019-08-06 | 惠州市惠阳广杰五金制品有限公司 | A kind of handware casting technique |
| CN110722103A (en) * | 2019-11-26 | 2020-01-24 | 温州万虹阀门有限公司 | Precision casting process of high-rotation-speed mixing head |
| CN111069531A (en) * | 2020-01-06 | 2020-04-28 | 山东森宇精工科技有限公司 | Wax mould tree manufacturing method |
-
2020
- 2020-11-17 CN CN202011282382.3A patent/CN112589045A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0255639A (en) * | 1988-08-19 | 1990-02-26 | Mazda Motor Corp | Manufacture of wax pattern in lost wax casting |
| CN103706759A (en) * | 2013-12-27 | 2014-04-09 | 惠东县吉邦五金制品有限公司 | Precision cast wax module tree structure |
| CN206732048U (en) * | 2017-04-28 | 2017-12-12 | 连云港源钰金属制品有限公司 | A kind of modified form hot investment casting wax tree structure |
| CN108672653A (en) * | 2018-06-08 | 2018-10-19 | 泰州市博世特精密铸造有限公司 | Casting method applied to automobile engine cylinder head |
| CN208712779U (en) * | 2018-07-27 | 2019-04-09 | 深圳市科立达机械有限公司 | Model casting group tree construction |
| CN109773122A (en) * | 2019-02-19 | 2019-05-21 | 大成（常熟）机械有限公司 | A kind of production technology and valve castings of the model casting of valve castings |
| CN110090923A (en) * | 2019-05-22 | 2019-08-06 | 惠州市惠阳广杰五金制品有限公司 | A kind of handware casting technique |
| CN110722103A (en) * | 2019-11-26 | 2020-01-24 | 温州万虹阀门有限公司 | Precision casting process of high-rotation-speed mixing head |
| CN111069531A (en) * | 2020-01-06 | 2020-04-28 | 山东森宇精工科技有限公司 | Wax mould tree manufacturing method |
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