CN107350429A - One kind mixing primary and secondary cored-up mould technique - Google Patents
One kind mixing primary and secondary cored-up mould technique Download PDFInfo
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- CN107350429A CN107350429A CN201710442909.6A CN201710442909A CN107350429A CN 107350429 A CN107350429 A CN 107350429A CN 201710442909 A CN201710442909 A CN 201710442909A CN 107350429 A CN107350429 A CN 107350429A
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Classifications
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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
- B22C9/103—Multipart cores
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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
- B22C9/108—Installation of cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
-
- 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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses one kind to mix primary and secondary cored-up mould technique, 3D printing moulding and mulling formative technology are combined, it will be close to the more part of product section architectural feature and use 3D printing, the less part of other structures feature uses traditional mulling moulding process, so as to form the fabricated sand mold mould that body core and sub- core are used cooperatively, under the advantage of original 3D printing Modeling Technology, introduce traditional puddle mixer production technology, two kinds of formative technologies are combined, and then reduce the cost of raw material and equipment investment cost, simultaneously by the sand mold part for taking casting out of with taking running gate system out of, the mold thickness of increase intensity carries out letter and divides core to combine, combined for later Alternative and extend thinking；The quantity of single sandbox medium casting is added, improves sandbox utilization rate and production efficiency, while is reduced to artificial dependence, reduces the 3D printing cost of raw material and equipment depreciation, while avoids the waste of molten iron, has reached the purpose of cost efficiency.
Description
Technical field
The present invention relates to and casting technology field, more particularly to one kind mix primary and secondary cored-up mould technique.
Background technology
So that the important spare part of railway locomotive adjusts -40 pump housings as an example, its material is HT200, overall size 163mm ×
149mm × 113mm, quality 5.3Kg, belong to gray iron small pieces.Because belonging to small pieces, casting die cavity is smaller, wherein
Need to cast out oil pipe intracavity diameter and there was only 15mm, core requires higher, conventional traditional handicraft frequently with tung oil sand do inner chamber core and
Arbor is added, resin sand does a variety of techniques being used in mixed way with sand of external form；Due to needing independent lower inner cavity core, traditional handicraft is often adopted
The mode poured, sandbox medium casting negligible amounts are put down with flat casting, and must could be completed by the veteran foundry work of hand moulding.This
Kind method is big to artificial dependence, and placer iron is than high, low production efficiency.
Using 3D printing Modeling Technology, original small inner chamber core can be taken out of realization and modularization moulding by external model, it is real
It is now moulded without mould；Along with the technique of series pouring, it can realize that more than one piece is poured into a mould in a sandbox, increase production efficiency.
But monoblock printing is directly carried out with 3D printing Modeling Technology, and not only need to print the sand mold for taking casting out of, and it is necessary
Get extra mold thickness and ensure sand mold intensity, because the prices of raw materials such as the molding sand, resin, curing agent of 3D printing are than tradition
The prices of raw materials of mulling machine modeling are much higher, and therefore, it is difficult to reduce the cost of production；The core of monoblock printing simultaneously, due to casting
Inner chamber core diameter is smaller, and 3D printing moulding can not add arbor enhancing sand core strength, therefore in core group core and transports
Unavoidable damage string pours indivedual core cavity types in module core in journey, it is impossible to and replacing can not repair, and can only then pour into a mould, from
And the waste of molten iron is caused, and then percent defective is added, cost is further increased, the advantage that 3D printing string pours also receives
Weaken.
The content of the invention
It is an object of the invention to：Overcome the above-mentioned problems in the prior art, propose that a kind of mixing primary and secondary group core is made
Type technique, under the advantage of original 3D printing Modeling Technology, traditional puddle mixer production technology is introduced, two kinds of formative technologies are mutually tied
Close, and then reduce the cost of raw material and equipment investment cost, at the same by the sand mold part for taking casting out of and take out of running gate system,
The mold thickness of increase intensity carries out letter and divides core to combine, and is combined for later Alternative and extends thinking；Add in single sandbox
The quantity of casting, sandbox utilization rate and production efficiency are improved, while reduced to artificial dependence, reduce 3D printing former material
Expect cost and equipment depreciation, while avoid the waste of molten iron, reach the purpose of cost efficiency.
The purpose of the present invention is realized by following technical proposals：
One kind mixing primary and secondary cored-up mould technique, 3D printing moulding and mulling formative technology are combined, will be close to product section
The more part of architectural feature uses 3D printing, and the less part of other structures feature uses traditional mulling moulding process,
So as to form the fabricated sand mold mould that body core and sub- core are used cooperatively, following steps are specifically included：
S1:The foundation of product threedimensional model：Correctly three-dimensional is established with 3 d modeling software according to the two-dimentional drawing requirement of casting
Product model；
S2:The determination of pouring technology scheme：Arranged using series pouring scheme, and in multi-layer multi-row matrix form；
S3:The design of three-dimensional foundary methods drawing：Arrangement mode graphing in 3 d modeling software in S2 steps,
And corresponding running gate system and rising head are drawn out, designed technique is carried out using casting simulation software to fill type and solidification mould
Intend, verify the three-dimensional series connection pouring casting process figure of qualified rear as design；
S4:The design and cutting of body core：A simple sand base is drawn in 3 d modeling software and covers three-dimensional foundary methods drawing,
Using three-dimensional foundary methods drawing as cutter, sand base is inversely cut into the sand mold of an entirety, sand base cut into complete profile-followed
Casting mold, reduce mold thickness as far as possible, integral sand core is met the placer iron ratio of technological specification, the process program in step S2 enters
Row running gate system carries out modularization cutting；The dicing process is：First along identified running gate system cross gate top surface and
Difference cutting integral sand core among the number of plies of casting, integral sand core is cut into some pieces big of module sand mold, the big mould
Block core is as initial body core；Then two pieces of body cores with casting are subjected to cutting along casting die cavity periphery, cutting is got off
Some small cores be sub- core, sub- core should have certain taper with body core contact surface, and be syncopated as oblique angle face as a group core
Locating surface, core gap is stayed between sub- core and body core；
S5：The design and cutting of sub- core：Sub- core is subjected to cutting, distinguishes cutting integral sand core along identified die joint, then
Should split again for the inner chamber core opened by the cutting of die joint institute be merged into with and inner chamber core be connected root fulcrum outside
In type, two pieces of sub- core segment contact surfaces being cut into should make concavo-convex contact so that two parts combine fixation；
S6:The production of sub- core and body core：Directly produced with 3D printing for sub- core, pattern draft is then added for body core and makes phase
The wooden model answered is produced with puddle mixer；
S7:Mold Making and production：According to designed technique, mould, moulding, sand removal, application, baking operation are made,
Then a group core is carried out to primary and secondary core, and carries out core bag fastening, it is i.e. pourable to be put into covering dry sand in sandbox.
The a kind of of the present invention mixes primary and secondary cored-up mould technique, and bottom entering type running gate system is used in the step S3, according to
Running channel section area ratio elects unchoked running system as；Rising head uses general riser runner, and rising head is more than 2 with sprue section ratio
To ensure outlet effect；
A kind of mixing primary and secondary cored-up mould technique of the present invention, in the step S4, the mold thickness of three-dimensional foundary methods drawing is kept
In more than 70mm.
A kind of mixing primary and secondary cored-up mould technique of the present invention, two pieces of body cores with casting are along casting in the step S4
Die cavity periphery cutting mold thickness 30mm.
A kind of mixing primary and secondary cored-up mould technique of the present invention, organize in the step S4 core locating surface virgin core and body core it
Between core gap be 1mm.
According to above-mentioned technical proposal, the beneficial effects of the invention are as follows：A kind of mixing primary and secondary cored-up mould technique is proposed, in original
Under the advantage for having 3D printing Modeling Technology, traditional puddle mixer production technology is introduced, two kinds of formative technologies are combined, and then is reduced
The cost of raw material and equipment investment cost, while by the sand mold part of taking casting out of and take running gate system, increase intensity out of
Mold thickness carries out letter and divides core to combine, and is combined for later Alternative and extends thinking；The quantity of single sandbox medium casting is added,
Sandbox utilization rate and production efficiency are improved, while is reduced to artificial dependence, the 3D printing cost of raw material is reduced and sets
Standby depreciation, while the waste of molten iron is avoided, reach the purpose of cost efficiency.
Brief description of the drawings
Fig. 1 is processed product schematic diagram in the embodiment of the present invention；
Fig. 2 is foundary methods drawing in the embodiment of the present invention；
Fig. 3 is by the inverse integral sand core figure obtained of three-dimensional foundary methods drawing in the embodiment of the present invention；
Fig. 4 is the core schematic diagram that cutting finishes in the embodiment of the present invention；
Fig. 5 is neutron core schematic diagram of the embodiment of the present invention；
Fig. 6 is the core bag schematic diagram of completion group core in the embodiment of the present invention.
Embodiment
With reference to specific embodiments and the drawings, the present invention is further illustrated.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Such as the embodiment that Fig. 1-6 is a kind of mixing primary and secondary cored-up mould technique of the invention, it is small that it is adapted to numerous complicated
Casting method in part product rapid shaping, is comprised the following steps that：Moulds Based on Three-Dimensional Models is established, will according to the two-dimentional drawing of casting
Ask and establish correct Moulds Based on Three-Dimensional Models with 3 d modeling software, if Fig. 1 middle pump bodies
2）Process program is determined, because being smallclothes, lighter weight, thus in order to improve product yield, while placer iron ratio is reduced,
The series pouring process program of use, concrete scheme are：Choose pump body cast 5 has base plane to place down in sandbox, gold
Belong to liquid and inject die cavity from bottom；The gusset medium line for choosing pump housing base and oil duct end face is die joint 1, according to the space of sandbox
Size and reserved mold thickness determine to the greatest extent casting quantity, and this scheme is set to 12；Casting divides two layers of 6 rows totally 5 row
Arranged in matrix form.
3）Three-dimensional foundary methods drawing is designed, due to the casting program using bilayer series connection, pressure head is larger, should ensure that and fills
Type is steady, reduces the scouring force to die cavity, therefore takes bottom entering type running gate system, and open cast is elected as by running channel section area ratio
System；Rising head uses general riser runner 6, and rising head should be greater than 2 to ensure outlet effect with the section ratio of sprue 2, remaining remove with
The related parameter of mould is outer without design, and remaining related process parameters designs according to conventional casting techniques design cycle, and
Draw out corresponding running gate system and rising head in 3 d modeling software, the running gate system includes sprue 2, cross gate 3 and interior
Running channel 4, designed technique is carried out using casting simulation software to fill type and solidification simulation, verify the three of qualified rear as design
Series pouring foundary methods drawing is tieed up, as shown in Figure 2.4）The design and cutting of body core.A letter is drawn in 3 d modeling software
Single sand base covers three-dimensional casting technique, and using three-dimensional foundary methods drawing as cutter, sand base is inversely cut into entirety
Sand mold cuts into complete profile-followed casting as shown in figure 3, the mold thickness of three-dimensional foundary methods drawing is maintained at more than 70mm, by sand base
Type, mold thickness is reduced as far as possible, integral sand core is met the placer iron ratio of technological specification.The running gate system determined by process program is carried out
Modularization cutting, specific dicing process are：First along identified running gate system cross gate 3 among the number of plies of top surface and casting
Cutting integral sand core respectively, integral sand core is cut into four pieces big of module sand mold, and this 4 pieces big module cores are as initially
Body core 8；Then two pieces of body cores with casting are subjected to cutting, get off 12 pieces of cutting along casting die cavity periphery 30mm mold thicknesses
Small core is sub- core 7, and sub- core 7 should have certain taper with the contact surface of body core 8, and be syncopated as oblique angle face as primary and secondary group core
Inclined-plane 10 is positioned, 1mm cores gap is stayed as shown in figure 4,5 between sub- core 7 and body core 8）The design and cutting of sub- core 7.To 12 pieces
Sub- core 7 carries out cutting, distinguishes cutting integral sand core along identified die joint, then the inner chamber for being opened by the cutting of die joint institute
Core should split again be merged into with and inner chamber core be connected in the external form of root fulcrum, the particularly pump housing oil pipe of syphon shape
Core 9, corresponding core fulcrum portion should be syncopated as and ensure its intensity, the sub- part contact surface of core 7 of two be cut into piece should be made recessed
Convex contact is fixed so that two parts combine, as shown in figure 5,6）Printing production.Directly produced with 3D printing for sub- core 7, for
Body core 8 then adds the corresponding wooden model of pattern draft making and produced with puddle mixer, because body core is simple in construction, required cost
Also it is easier to control with fabrication cycle.
7）Production division is transferred to be responsible for making the processes such as mould, moulding, sand removal, application, drying for designed technique,
A group core is finally carried out to alphabetical core, and core bag fastening is carried out with screw rod, it is i.e. pourable to be put into covering dry sand in sandbox.
By using the technology mode of series pouring in 3D printing casting technique, it is combined with resin pug mixer moulding,
Compared with conventional technique, 3D printing raw material usage of knowing clearly is reduced, while reduce equipment investment and production cost；Add sand
Casting quantity in case, from one case 4 increase to one case 12, improve sandbox utilization rate and production efficiency；Reduce artificial skill
It can require, be easy to implement batch production；For the product of the similar pump housing, such as rocker shaft bed, valve body diesel locomotive casting, only need
Sub- core changes printing, and body core can borrow, so have cured technique, be easy to quality control, while reduce grinding for similar products
Cost is sent out, has been finally reached the beneficial effect of cost efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. one kind mixing primary and secondary cored-up mould technique, it is characterised in that 3D printing moulding and mulling formative technology are combined, will
The part more close to product section architectural feature uses 3D printing, and the less part of other structures feature is made using traditional mulling
Type process, so as to form the fabricated sand mold mould that body core and sub- core are used cooperatively, specifically include following steps：
S1:The foundation of product threedimensional model：Correctly three-dimensional is established with 3 d modeling software according to the two-dimentional drawing requirement of casting
Product model；
S2:The determination of pouring technology scheme：Arranged using series pouring scheme, and in multi-layer multi-row matrix form；
S3:The design of three-dimensional foundary methods drawing：Arrangement mode graphing in 3 d modeling software in S2 steps,
And corresponding running gate system and rising head are drawn out, designed technique is carried out using casting simulation software to fill type and solidification mould
Intend, verify the three-dimensional series connection pouring casting process figure of qualified rear as design；
S4:The design and cutting of body core：A simple sand base is drawn in 3 d modeling software and covers three-dimensional foundary methods drawing,
Using three-dimensional foundary methods drawing as cutter, sand base is inversely cut into the sand mold of an entirety, sand base cut into complete profile-followed
Casting mold, reduce mold thickness as far as possible, integral sand core is met the placer iron ratio of technological specification, the process program in step S2 enters
Row running gate system carries out modularization cutting；The dicing process is：First along identified running gate system cross gate top surface and
Difference cutting integral sand core among the number of plies of casting, integral sand core is cut into some pieces big of module sand mold, the big mould
Block core is as initial body core；Then two pieces of body cores with casting are subjected to cutting along casting die cavity periphery, cutting is got off
Some small cores be sub- core, sub- core should have certain taper with body core contact surface, and be syncopated as oblique angle face as a group core
Locating surface, core gap is stayed between sub- core and body core；
S5：The design and cutting of sub- core：Sub- core is subjected to cutting, distinguishes cutting integral sand core along identified die joint, then
Should split again for the inner chamber core opened by the cutting of die joint institute be merged into with and inner chamber core be connected root fulcrum outside
In type, two pieces of sub- core segment contact surfaces being cut into should make concavo-convex contact so that two parts combine fixation；
S6:The production of sub- core and body core：Directly produced with 3D printing for sub- core, pattern draft is then added for body core and makes phase
The wooden model answered is produced with puddle mixer；
S7:Mold Making and production：According to designed technique, mould, moulding, sand removal, application, baking operation are made,
Then a group core is carried out to primary and secondary core, and carries out core bag fastening, it is i.e. pourable to be put into covering dry sand in sandbox.
A kind of 2. mixing primary and secondary cored-up mould technique according to claim 1, it is characterised in that：Used in the step S3
Bottom entering type running gate system, unchoked running system is elected as according to running channel section area ratio；Rising head uses general riser runner, rising head
It is more than 2 with sprue section ratio to ensure outlet effect.
A kind of 3. mixing primary and secondary cored-up mould technique according to claim 1, it is characterised in that：In the step S4, three
The mold thickness of dimension foundary methods drawing is maintained at more than 70mm.
A kind of 4. mixing primary and secondary cored-up mould technique according to claim 1, it is characterised in that：Carried in the step S4
Two pieces of body cores of casting are along casting die cavity periphery cutting mold thickness 30mm.
A kind of 5. mixing primary and secondary cored-up mould technique according to claim 1, it is characterised in that：Core is organized in the step S4
Core gap is 1mm between locating surface virgin core and body core.
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Cited By (18)
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| CN108213342A (en) * | 2018-03-01 | 2018-06-29 | 四川共享铸造有限公司 | The casting technique of the complicated smallclothes of batch production |
| CN108296454A (en) * | 2018-01-26 | 2018-07-20 | 共享智能铸造产业创新中心有限公司 | The parting and its parting scheme of impeller class product |
| CN108940123A (en) * | 2018-07-21 | 2018-12-07 | 共享智能铸造产业创新中心有限公司 | The manufacturing method of straw granulator grain forming module |
| CN109175307A (en) * | 2018-11-07 | 2019-01-11 | 西安西工大超晶科技发展有限责任公司 | A kind of 3D printing sand mold antigravity casting forming method |
| CN109465407A (en) * | 2018-11-28 | 2019-03-15 | 贵州安吉航空精密铸造有限责任公司 | A kind of assisted location method in sand casting process |
| CN109807285A (en) * | 2017-11-22 | 2019-05-28 | 于彦奇 | A kind of die cast method |
| CN109807286A (en) * | 2017-11-22 | 2019-05-28 | 于彦奇 | A kind of die cast method that may be implemented to be quickly cooled down |
| CN110523922A (en) * | 2019-09-30 | 2019-12-03 | 共享智能铸造产业创新中心有限公司 | A kind of casting sand type of multiway valve casting |
| CN111299517A (en) * | 2020-04-01 | 2020-06-19 | 广西玉柴机器股份有限公司 | Air inlet sand core structure and core manufacturing method |
| US10906091B2 (en) | 2018-06-29 | 2021-02-02 | Danfoss (Tianjin) Ltd. | Sand casting mold and method of forming sand casting mold by 3D printing |
| CN113414351A (en) * | 2021-07-06 | 2021-09-21 | 安徽合力股份有限公司合肥铸锻厂 | 3D printing forming process of sand mold for tailstock-free counterweight production |
| CN114012041A (en) * | 2021-10-11 | 2022-02-08 | 甘肃酒钢集团西部重工股份有限公司 | Casting device and casting method for producing small impeller by 3DP sand mold technology |
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| CN114559056A (en) * | 2020-11-27 | 2022-05-31 | 成新科技股份有限公司 | 3D printing method for improving production efficiency of parts |
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| CN109807286A (en) * | 2017-11-22 | 2019-05-28 | 于彦奇 | A kind of die cast method that may be implemented to be quickly cooled down |
| CN108296454A (en) * | 2018-01-26 | 2018-07-20 | 共享智能铸造产业创新中心有限公司 | The parting and its parting scheme of impeller class product |
| CN108213342A (en) * | 2018-03-01 | 2018-06-29 | 四川共享铸造有限公司 | The casting technique of the complicated smallclothes of batch production |
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