CN107649653A - A kind of method of 3D printing core - Google Patents
A kind of method of 3D printing core Download PDFInfo
- Publication number
- CN107649653A CN107649653A CN201711009603.8A CN201711009603A CN107649653A CN 107649653 A CN107649653 A CN 107649653A CN 201711009603 A CN201711009603 A CN 201711009603A CN 107649653 A CN107649653 A CN 107649653A
- Authority
- CN
- China
- Prior art keywords
- core
- printing
- outlet passageway
- graphic file
- sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
Abstract
The invention discloses a kind of method of 3D printing core, and it is first by the X-Y scheme file transformation of ownership of casting into 3-D graphic file, and the 3-D graphic file is inversely then made into integrally-built core graphic file；Design the outlet passageway of core with type in the case where ensureing sand core strength afterwards, the core is then subjected to modularization cutting；The Butut that 3D printer can identify is made in the cross section profile data of each piece of core segmented；The Butut is printed by 3D printer and obtains core.The present invention have devised the outlet passageway of core in the typesetting figure of 3D printing core, so that gas caused by core can discharge along the outlet passageway of design, effectively reduce the generation of bleb defect, the collapsibility of molding sand can also be strengthened simultaneously, effectively shorten process of unpacking, save the operating time, simultaneously for thick big core, the inventive method can also reduce the usage amount of resin, save production cost.
Description
Technical field
The present invention relates to a kind of method of 3D printing core, belong to casting technology field.
Background technology
Core is the material for being used to manufacture core in Foundry Production, typically by casting model powder, moulding sand binder (resin, solidification
Agent) and the Modeling Material such as additional thing mix according to a certain percentage, ad-hoc location core being fixed in sand mo(u)ld, then pour
Note, after the completion of casting, core has just been wrapped in casting, breaks core into pieces, the chamber portion being formed in casting.Due to core
In contain moisture, while the gas forming amount of the organic mixture such as resin, curing agent in itself is also very big, and high temperature liquid iron is met in core
When caused gas flow be it is very big, in order to avoid casting produce gas hole defect, it is necessary to design outlet passageway in core.
It is to pour into material in core box to be molded that traditional core, which makes, and outlet passageway in upper core box and dividing on core face for lower core box by manually digging
Go out, but this method wastes time and energy, and efficiency is low, just number especially for the casting that some shape and structures are complicated, casting mold
It is tired.
With advances in technology, the especially popularization and application of 3D printing technique, casting life is carried out using 3D printing core
The method of production is gradually popular in industry.This method, can be real without considering the molding of similar traditional handicraft and removing material problem
The disposable high-precision printing of existing various labyrinth cores, substantially increases the flexibility of casting Technology Design.It is but traditional
Outlet mode can not be applied on new 3D printing core-making method, and 3D printing core not yet obtains very well in terms of outlet at present
Improvement, cause that casting flaw is more, unstable product quality.
The content of the invention
In view of this, in view of the shortcomings of the prior art, the present invention provides a kind of method of 3D printing core, to solve core
Outlet problem, avoid casting produce gas hole defect, improve casting quality.
To solve above technical problem, the technical scheme is that using a kind of method of 3D printing core, it includes
Following steps：
(1) the X-Y scheme file transformation of ownership of casting the 3-D graphic file is inversely made whole into 3-D graphic file
The core graphic file of body structure；
(2) the overall structure core in step (1) core graphic file is designed to the outlet passageway of core with type, designed
The intensity of core is should ensure that during outlet passageway, the core is then subjected to modularization cutting；
(3) Butut that 3D printer can identify is made in the cross section profile data of each piece of core segmented；
(4) Butut in step (3) is printed by 3D printer and core material and obtains core.
Further, in order to avoid outlet passageway produces stress sand core strength is reduced, step (2) outlet passageway
Design in, the rotation angle position of outlet passageway answers rounding.
Further, during step (3) Butut, outlet passageway direction should be avoided to be coincided with core delamination stress, shadow
Ring sand core strength.
Further, the core material described in the step (4) is the mixture of molding sand, resin and curing agent.
Further, the molding sand is selected from fire sand, silica sand and quartz sand.
Further, the resin is low nitrogen furans, and it is that nitrogen content is less than weight than 3% without free phenol furans, its
Viscosity is 10~20mpaS, and density is 1.15~1.20g/cm3, it is 5~6.5 that water content weight ratio, which is less than 10%, pH value, trip
It is not more than 1.5% from content of formaldehyde weight ratio.
Further, the curing agent is liquid para toluene sulphonic acid, and its total acid weight ratio is 23~27%, free acid weight
Than for 4~10%, the density at 20 DEG C is 1.05~1.15g/cm3, viscosity is 10~30mPas.
Compared with prior art, the method for 3D printing core provided by the invention, in the case where ensureing sand core strength
The outlet passageway of core is have devised in the typesetting figure of 3D printing core, so that gas caused by core can be along design
Outlet passageway is discharged, and effectively reduces the generation of bleb defect, while can also strengthen the collapsibility of molding sand, is effectively shortened and is opened
Case process, the operating time is saved, simultaneously for thick big core, the inventive method can also reduce the usage amount of resin, save production
Cost.
Embodiment
In order that those skilled in the art more fully understands technical scheme, below with preferred embodiment pair
The present invention is described in further detail.It should be pointed out that following preferred embodiments are not construed as limitation of the present invention,
Protection scope of the present invention should be defined by claim limited range.Come for those skilled in the art
Say, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these improvements and modifications should also regard
For protection scope of the present invention.
The invention provides a kind of method of 3D printing core, it comprises the following steps：
(1) it is the X-Y scheme file of the casting of required casting is soft by three-dimensional modelings such as UG, Pro/Engineer, CAD
Into 3-D graphic file integrally-built core graphic file is inversely made in the 3-D graphic file by the part transformation of ownership；
(2) while sand core strength is ensured, the overall structure core in step (1) core graphic file is designed with type
Go out the outlet passageway of core；In design, in order to avoid outlet passageway produces stress sand core strength is reduced, outlet passageway
Rotation angle position must rounding；Then the core graphic file for having designed outlet passageway is subjected to modularization cutting；
(3) Butut that 3D printer can identify is made in the cross section profile data of each piece of core segmented；
(4) Butut in step (3) is printed by 3D printer and core material and obtains core；It is noted that
It is that in Butut outlet passageway direction should be avoided to be coincided with core delamination stress.
Above-mentioned core material is the mixture of molding sand, resin and curing agent.
Molding sand is selected from fire sand, silica sand and quartz sand.
Resin is low nitrogen furans, and it is that nitrogen content is less than weight than 3% without free phenol furans, its viscosity is 10~
20mpaS, density are 1.15~1.20g/cm3, it is 5~6.5 that water content weight ratio, which is less than 10%, pH value, free formaldehyde content
Weight ratio is not more than 1.5%.
Curing agent is liquid para toluene sulphonic acid, and its total acid weight ratio is 23~27%, and free acid weight ratio is 4~10%,
Density at 20 DEG C is 1.05~1.15g/cm3, viscosity is 10~30mPas.
The method of 3D printing core provided by the invention, in the case where ensureing sand core strength in the typesetting of 3D printing core
The outlet passageway of core is have devised in figure, so that gas caused by core can discharge along the outlet passageway of design, is had
Effect reduces the generation of bleb defect, while can also strengthen the collapsibility of molding sand, effectively shortens process of unpacking, and saves operation
Time, simultaneously for thick big core, the inventive method can also reduce the usage amount of resin, save production cost.
Claims (7)
- A kind of 1. method of 3D printing core, it is characterised in that：Comprise the following steps：(1) into 3-D graphic file overall knot is inversely made in the 3-D graphic file by the X-Y scheme file transformation of ownership of casting The core graphic file of structure；(2) the overall structure core in step (1) core graphic file is designed to the outlet passageway of core with type, designs outlet The intensity of core is should ensure that during passage, the core is then subjected to modularization cutting；(3) Butut that 3D printer can identify is made in the cross section profile data of each piece of core segmented；(4) Butut in step (3) is printed by 3D printer and core material and obtains core.
- A kind of 2. method of 3D printing core according to claim 1, it is characterised in that：Step (2) outlet passageway Design in, the rotation angle position rounding of outlet passageway.
- A kind of 3. method of 3D printing core according to claim 1, it is characterised in that：During step (3) Butut, go out Gas channel direction avoids coinciding with core delamination stress.
- A kind of 4. method of 3D printing core according to claim 1, it is characterised in that：Described in the step (4) Core material is the mixture of molding sand, resin and curing agent.
- A kind of 5. method of 3D printing core according to claim 4, it is characterised in that：The molding sand be selected from fire sand, Silica sand and quartz sand.
- A kind of 6. method of 3D printing core according to claim 4, it is characterised in that：The resin is low nitrogen furans.
- A kind of 7. method of 3D printing core according to claim 4, it is characterised in that：The curing agent is liquid to first Benzene sulfonic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009603.8A CN107649653A (en) | 2017-10-25 | 2017-10-25 | A kind of method of 3D printing core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711009603.8A CN107649653A (en) | 2017-10-25 | 2017-10-25 | A kind of method of 3D printing core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107649653A true CN107649653A (en) | 2018-02-02 |
Family
ID=61119734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711009603.8A Pending CN107649653A (en) | 2017-10-25 | 2017-10-25 | A kind of method of 3D printing core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107649653A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280722A (en) * | 2018-03-19 | 2019-09-27 | 科华控股股份有限公司 | A kind of production method of 3D printing turbine case runner core |
| CN112453327A (en) * | 2020-10-21 | 2021-03-09 | 康硕(江西)智能制造有限公司 | Sand core 3D printing method, system, terminal and computer readable storage medium |
Citations (5)
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| CN105834374A (en) * | 2016-02-02 | 2016-08-10 | 宁夏共享模具有限公司 | 3D printing containerless casting method of internal combustion engine frame |
| CN106334780A (en) * | 2015-07-08 | 2017-01-18 | 共享装备有限公司 | Method for producing sand mold for cylinder cover through modularization |
| CN106345973A (en) * | 2016-08-25 | 2017-01-25 | 四川南车共享铸造有限公司 | Locomotive oil inlet casing sand core and manufacturing method thereof |
| CN107127304A (en) * | 2017-05-17 | 2017-09-05 | 宁夏共享模具有限公司 | A kind of automobile engine cylinder-body 3D printing production method |
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2017
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Patent Citations (5)
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| CN106334780A (en) * | 2015-07-08 | 2017-01-18 | 共享装备有限公司 | Method for producing sand mold for cylinder cover through modularization |
| CN105834374A (en) * | 2016-02-02 | 2016-08-10 | 宁夏共享模具有限公司 | 3D printing containerless casting method of internal combustion engine frame |
| CN106345973A (en) * | 2016-08-25 | 2017-01-25 | 四川南车共享铸造有限公司 | Locomotive oil inlet casing sand core and manufacturing method thereof |
| CN107127304A (en) * | 2017-05-17 | 2017-09-05 | 宁夏共享模具有限公司 | A kind of automobile engine cylinder-body 3D printing production method |
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| 付岳楼等: "基于3D打印的某型柴油机缸盖铸造成型工艺", 《中国铸造装备与技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280722A (en) * | 2018-03-19 | 2019-09-27 | 科华控股股份有限公司 | A kind of production method of 3D printing turbine case runner core |
| CN112453327A (en) * | 2020-10-21 | 2021-03-09 | 康硕(江西)智能制造有限公司 | Sand core 3D printing method, system, terminal and computer readable storage medium |
| CN112453327B (en) * | 2020-10-21 | 2022-05-10 | 康硕(江西)智能制造有限公司 | Sand core 3D printing method, system, terminal and computer readable storage medium |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180202 |
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