CN105215271B - The cored-up mould sand mould structure and cored-up mould method of a kind of gear box casing casting - Google Patents
The cored-up mould sand mould structure and cored-up mould method of a kind of gear box casing casting Download PDFInfo
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Abstract
The present invention relates to the cored-up mould sand mould structure and cored-up mould method of a kind of gear box casing casting in casting technology field, the wherein cored-up mould sand mould structure of gear box casing casting, inner chamber core including cored-up mould, outline core and running gate system sand mold, the die cavity of shell casting is formed after inner chamber core and outline the core mould assembly, some circular rising heads are provided with the upside of the upper surface of the shell casting, some chills are set in the outline core between the circular rising head, provided with subsidy in the lateral corresponding outline core of side boss below the wall of the shell casting side, heat-insulation layer is provided with the outside of the subsidy；Provided with the ingate connected with the die cavity of casting in the running gate system sand mold.The cored-up mould sand mould structure of the present invention can save moulding and the casting cost of casting, reduce the workload of casting postorder machining, improve production efficiency.
Description
Technical field
The present invention relates to casting technology field, the cored-up mould sand mould structure of more particularly to a kind of gear box casing casting and
Cored-up mould method.
Background technology
Gear box casing casting structure is complicated as shown in figure 1, conventional casting compares, agent structure is similar be open to
Under casing, the wall thickness of housing upper surface 1 be 50 ~ 250mm, there is many places boss 2,2 ' on end face.And housing sidewall thickness is only
38mm, and there is periphery not have several side boss 3,3 ' below the wall of side, above-mentioned boss is the thermal center of housing sidewall, and feeding is stranded
It is difficult.
In the prior art, the casting shrinkage technique of the gear box casing casting is produced as shown in Fig. 2 housing upper surface is used
Two oval open risers 4,4 ' carry out feeding, and housing sidewall lower side boss 3,3 ' carries out feeding using blind riser 5,5 '.Housing
The formative method of casting is using entity head-on collision moulding, mould assembling schematic diagram point top box 6 and nowel 7 as shown in Figure 3.
The cored-up mould scheme of this shell casting of the prior art is primarily present problems with：
1）Open riser size is big, and the projection shape of housing upper surface has been covered in rising head, has caused upper surface straight
Connect and cast out projection shape, it is necessary to machine-shaping, increase processing cost and process-cycle；
2）Lower convex platform below housing sidewall uses blind riser feeding scheme, can cause the increase of casting mold thickness, placer iron ratio
Too high, at the same time the increase of moulding cost adds open riser feeding pressure, causes open riser to become large-sized, yield rate reduction,
The increase of melting cost；
3）Whole founding method is clashed moulding using entity, can only produce one one case, and production efficiency is low.
The content of the invention
There is provided a kind of casting of gear box casing for deficiency of the invention for gear box casing casting formative method in the prior art
The cored-up mould sand mould structure of part, to save moulding and the casting cost of casting, reduces the workload of casting postorder machining,
Improve production efficiency.
The object of the present invention is achieved like this, a kind of cored-up mould sand mould structure of gear box casing casting, including group
Formed after inner chamber core, outline core and the running gate system sand mold of core sand moulding, inner chamber core and outline the core mould assembly
It is provided with outer between some circular rising heads, the circular rising head on the upside of the die cavity of shell casting, the upper surface of the shell casting
Set in the lateral corresponding outline core of the side boss below some chills, shell casting side wall and be provided with profile core
Heat-insulation layer is provided with the outside of subsidy, the subsidy；Provided with the ingate connected with the die cavity of casting in the running gate system sand mold.
In the cored-up mould sand mould structure of the present invention, some small circular rising heads are set in shell casting upper surface, realized
Uniform feeding to thermal center at boss on the upside of casting, and boss on the upside of casting only has part to be blocked by rising head, the shape of boss
Shape basic casting, it is not necessary to be processed again, shortens the production cycle after casting and processing cost；Casting side wall
The boss of lower section can improve feeding efficiency, heat-insulation layer adds subsidy heat-insulating property using subsidy and heat-insulation layer feeding scheme,
Feeding quality is improved, relative to the consumption that blind riser feeding can reduce molten casting iron, the yield rate of casting is improved, reduces placer iron
Than；The structure of the cored-up mould of the present invention need not distinguish moulding top box and nowel, reduce the workload of mould turnover and mould assembling.
As the improvement of the present invention, top of the circular rising head including feeding top surface boss emits in the outline core
Mouth, the side riser of feeding side wall and feeding side wall and the side riser of side wall lower projection, also set between the side riser and subsidy
There is transition subsidy to connect the subsidy passage of side riser and side boss, the lateral of transition subsidy also is provided with heat-insulation layer.This hair
Bright rising head and subsidy method to set up, relative to the method to set up of open riser of the prior art and blind riser, can accurately be mended
Contracting casting each needs the heat energy-saving position of feeding, and casting global tissue structure is evenly fine and close.
As the improvement of the present invention, the curved distribution of each chill between the circular rising head, the size of the chill is
φ100*150mm.Into the chill of curve distribution, casting can be prevented too strong because of iron chill shock chilling, cause linear cracking, extend feeding
Offset is from the defect between reduction casting pressing port makes tissue finer and close.
As a further improvement on the present invention, the thickness that the subsidy and transition are subsidized is 20 ~ 100mm.
Improved as another step of the present invention, the running gate system sand mold is arranged at the downside of sandbox, the inner chamber core
It is set in turn in outline core on the upside of running gate system sand mold, and is symmetrical arranged on the upside of running gate system sand mold four groups of inner chambers
Core and outline core.The cored-up mould structure of the present invention, can be while four groups of casting sand molds of moulding, hence it is evident that improve casting group
Core sand moulding and the production efficiency of casting.
Positioned for ease of accurate lower core, be provided with the upside of the running gate system sand mold and be easy to lower core that inner chamber core, foreign steamer are installed
Wide core sag recess.
The present invention also provides a kind of cored-up mould method of the sand mould structure of above-mentioned gear box casing casting, including following mistake
Journey：
1）Using cored-up mould method, difference moulding inner chamber core, outline core and running gate system sand mold；
The inner chamber core is made by inner chamber core box quicksand moulding, the outline core by outline core box quicksand
Type, the outline core box includes core box frame and core box model, and the core box model includes casting outline model, casting foreign steamer
Some rising head models being correspondingly arranged on the upside of wide model upper surface and the corresponding subsidy of casting outline model side outside the boss
Model, during quicksand moulding outline core, buries insulating brick in the outside of each subsidy model, is buried between rising head model some
The circular chill of curved cloth；
2）Running gate system sand mold is placed on moulding plate, plays core to assemble successively, first lower inner cavity core, then coordinate outside tripping in
Profile core, and inner chamber core and outline core bottom and the mud bar sealing of running gate system sand mold seam crossing；
3）Lower core assembling terminates rear engagement sleeves sand loading case, and running gate system sand mold and the core respectively assembled are surrounded, then flows
Silica sand and embedded sprue and sprue cup, quicksand complete the cored-up mould of gear box casing casting.
It is used as cored-up mould further improvements in methods of the present invention, the process 1）In, quicksand moulding inner chamber core and outer
During profile core, the position stream thickness contacted with core box model is the thick chrome ores of 50-60mm, and silica sand is flowed at other floor sand positions.
The sand mould structure cored-up mould method of the gear box casing casting of the present invention, using cored-up mould scheme, regardless of upper
Nowel moulding, reduces the workload of mould assembling, and same case can produce four simultaneously, improve production efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of gear box casing casting.
Fig. 2 is the casting shrinkage artwork of gear box casing casting of the prior art.
Fig. 3 is the mould assembling schematic diagram of gear box casing casting of the prior art.
Fig. 4 is the schematic diagram of the outline core box of the group sand molding of the gear box casing casting of the present invention.
Fig. 5 is the schematic diagram of the inner chamber core box of the group sand molding of the gear box casing casting of the present invention.
Fig. 6 is gear box casing casting outline core box model and feeding technology figure of the invention.
Fig. 7 is shell casting side boss feeding schematic diagram.
Fig. 8 is the cored-up mould schematic diagram of the gear box casing casting of the present invention.
Wherein, 1 housing upper surface；2nd, 2 ' boss；3rd, 3 ' side boss；4th, 4 ' oval open riser；5th, 5 ' blind riser；On 6
Case；7 nowels；8 core box frames；9 core box models；901 rising head models；901A top risers；901B side risers；901C side risers；902 castings
Part outline model；903 chills；904 hangers；905 subsidies；905A transition is subsidized；10 inner chamber core boxes；11 inner chamber cores；Outside 12
Profile core；13 running gate system sand molds；13A sinking recesses.
Embodiment
As shown in Fig. 4-Fig. 8, the cored-up mould sand mould structure of gear box casing casting includes the inner chamber sand of cored-up mould
Shell casting is formed after core 11, outline core 12 and running gate system sand mold 13, inner chamber core 11 and the mould assembly of outline core 12
Die cavity, some circular rising heads are provided with the upside of the upper surface of shell casting, if being set in the outline core between circular rising head
Set in the lateral corresponding outline core of side boss below dry and cold iron 903, casting side wall provided with subsidy 905, the outside of subsidy 905
There is heat-insulation layer；Provided with the ingate connected with the die cavity of casting in running gate system sand mold 13.
For ease of realizing accurate feeding, such as Fig. 6 and Fig. 7, in outline core, circular rising head includes feeding top surface boss
Top riser 901A, the side riser 901B of feeding side wall and feeding side wall and the side riser 901C of side wall lower projection, side riser
Transition subsidy 905A is additionally provided between 901C and subsidy 905 to connect the subsidy passage of side riser and side boss, transition subsidy
The lateral of 905A also is provided with heat-insulation layer.The rising head and subsidy method to set up of the present invention, transition is subsidized 905A and connected with subsidy 905
Feeding channel between side riser 901C and side boss, relative to the method to set up of open riser of the prior art and blind riser,
Accurately it can each need the heat energy-saving position of feeding by feeding casting, casting global tissue structure is evenly fine and close.
The curved distribution of each chill 903 between circular rising head, the size of chill 903 is φ 100*150mm, into curve point
The chill 903 of cloth, can prevent casting too strong because of iron chill shock chilling, cause linear cracking, extension feeding offset is from reduction casting emits
Defect between mouthful, makes tissue finer and close；The thickness of subsidy is 20 ~ 100mm；Running gate system sand mold 13 is arranged under sandbox
Side, inner chamber core 11 and outline core 12 are set in turn in the upside of running gate system sand mold 13, and in running gate system sand mold 13
Upside is symmetrical arranged four groups of inner chamber cores 11 and outline core 12；Positioned for ease of accurate lower core, on running gate system sand mold 13
Side, which is provided with, is easy to lower core to install inner chamber core 11, the sinking recess 13A of outline core 12.
In the cored-up mould sand mould structure of the present invention, some small circular rising head 12A are set in shell casting upper surface, it is real
Now to the uniform feeding of thermal center at boss on the upside of casting, and boss on the upside of casting only has part to be blocked by rising head, boss
Shape basic casting, it is not necessary to be processed again, shortens the production cycle after casting and processing cost；Casting side
Side boss below wall can improve feeding efficiency, heat-insulation layer adds subsidy insulation using subsidy, transition subsidy feeding scheme
Performance, improves feeding quality, relative to the consumption that blind riser feeding can reduce molten casting iron, improves the yield rate of casting, drop
Low placer iron ratio；The structure of the cored-up mould of the present invention need not distinguish moulding top box and nowel, reduce the work of mould turnover and mould assembling
Amount.
The cored-up mould method of the sand mould structure of the above-mentioned gear box casing casting of the present invention, including following process：
1）Using cored-up mould method, difference moulding inner chamber core 11, outline core 12 and running gate system sand mold 13；
Wherein, inner chamber core 11 is by the quicksand moulding of inner chamber core box 10, and outline core 12 passes through the outline shown in Fig. 4
Core box quicksand moulding, the outline core box includes core box frame 8 and core box model 9, and core box model 9 includes casting outline model
902nd, some rising head models 901 being correspondingly arranged on the upside of the upper surface of casting outline model 902 and the side of casting outline model 902
The corresponding subsidy model 905 of face outside the boss, is carried for ease of the lifting of core box model in addition, casting outline model 902
Several hangers 904 for being easy to handling are laterally additionally provided with, during quicksand moulding outline core 12, in the lateral embedded of each subsidy model
Insulating brick, buries the circular chill 903 of some curved cloth between rising head model 901；In addition, to prevent casting scab, flowing
When sand molding inner chamber core 11 and outline core 12, the position stream thickness contacted with core box model is the thick chrome ores of 50-60mm
Flow silica sand in sand, other floor sand positions；
2）Running gate system sand mold 13 is placed on moulding plate, plays core to assemble successively, first lower inner cavity core 11, then under coordinating
Enter outline core 12, and inner chamber core 11 and the bottom of outline core 12 and the seam crossing of running gate system sand mold 13 are close with mud bar
Envelope；
3）Lower core assembling terminates rear engagement sleeves sand loading case, and running gate system sand mold 13 and the core respectively assembled are surrounded, then
Silica sand and embedded sprue and sprue cup are flowed, quicksand completes the cored-up mould of gear box casing casting.
The sand mould structure cored-up mould method of the gear box casing casting of the present invention, using cored-up mould scheme, regardless of upper
Nowel moulding, reduces the workload of mould assembling, and same case can produce four cast products simultaneously, improve production efficiency.
Claims (7)
1. a kind of cored-up mould sand mould structure of gear box casing casting, includes inner chamber core, the outline core of cored-up mould
With running gate system sand mold, the die cavity of shell casting, the shell casting are formed after inner chamber core and outline the core mould assembly
Upper surface on the upside of be provided with some circular rising heads, some chills are set in the outline core between the circular rising head, it is described
Provided with subsidy in the lateral corresponding outline core of side boss below the wall of shell casting side, provided with insulation on the outside of the subsidy
Layer；Provided with the ingate connected with the die cavity of casting in the running gate system sand mold, it is characterised in that in the outline core
Interior, the circular rising head is included below top riser, the side riser of feeding side wall and the feeding side wall and side wall of feeding top surface boss
The side riser of side boss, the subsidy that transition subsidy is additionally provided between the side riser and subsidy to connect side riser and side boss is led to
Road, the lateral of transition subsidy also is provided with heat-insulation layer.
2. the cored-up mould sand mould structure of gear box casing casting according to claim 1, it is characterised in that the circle
The curved distribution of each chill between rising head, the size of the chill is φ 100*150mm.
3. the cored-up mould sand mould structure of gear box casing casting according to claim 1, it is characterised in that the subsidy
It is 20 ~ 100mm with the thickness that transition is subsidized.
4. the cored-up mould sand mould structure of the gear box casing casting according to Claims 2 or 3, it is characterised in that described
Running gate system sand mold is arranged at the downside of sandbox, and the inner chamber core and outline core are set in turn on running gate system sand mold
Side, and it is symmetrical arranged on the upside of running gate system sand mold four groups of inner chamber cores and outline core.
5. the cored-up mould sand mould structure of gear box casing casting according to claim 4, it is characterised in that the cast
Being provided with the upside of system sand mold is easy to lower core to install inner chamber core, outline core sag recess.
6. a kind of cored-up mould method of any one of claim 1-5 gear box casing casting sand mold structure, its feature exists
In, including following process：
1）Using cored-up mould method, difference moulding inner chamber core, outline core and running gate system sand mold；
The inner chamber core passes through outline core box quicksand moulding, institute by inner chamber core box quicksand moulding, the outline core
Stating outline core box includes core box frame and core box model, and the core box model includes casting outline model, casting outline mould
The lateral corresponding each subsidy mould of some rising head models and casting outline model side boss being correspondingly arranged on the upside of type upper surface
Type, during quicksand moulding outline core, in the laterally embedded insulating brick of each subsidy model, buries between rising head model and some is in
The circular chill of curve cloth；
2）Running gate system sand mold is placed on moulding plate, plays core to assemble successively, first lower inner cavity core, then coordinate tripping in outline
Core, and inner chamber core and outline core bottom and the mud bar sealing of running gate system sand mold seam crossing；
3）Lower core assembling terminates rear engagement sleeves sand loading case, running gate system sand mold and the core respectively assembled is surrounded, then flow silica sand
And embedded sprue and sprue cup, the cored-up mould of quicksand completion gear box casing casting.
7. the cored-up mould method of gear box casing casting sand mold structure according to claim 6, it is characterised in that described
Process 1）In, when quicksand moulding inner chamber core and outline core, the facing sand position that is contacted with core box model stream thickness is 50-
Flow silica sand in 60mm chrome ore, other floor sand positions.
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