CN105215271A - A kind of cored-up mould sand mould structure of gear box casing foundry goods and cored-up mould method - Google Patents
A kind of cored-up mould sand mould structure of gear box casing foundry goods and cored-up mould method Download PDFInfo
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- CN105215271A CN105215271A CN201510714427.2A CN201510714427A CN105215271A CN 105215271 A CN105215271 A CN 105215271A CN 201510714427 A CN201510714427 A CN 201510714427A CN 105215271 A CN105215271 A CN 105215271A
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Abstract
The present invention relates to cored-up mould sand mould structure and the cored-up mould method of a kind of gear box casing foundry goods in casting technology field, the wherein cored-up mould sand mould structure of gear box casing foundry goods, comprise the inner chamber core of cored-up mould, outline core and running gate system sand mold, the die cavity of shell casting is formed after described inner chamber core and outline core mould assembly, some circular rising heads are provided with on the upside of the upper surface of described shell casting, in outline core between described circular rising head, some chills are set, subsidy is provided with in the outline core that side boss side direction below described shell casting sidewall is corresponding, described subsidy outside is provided with heat-insulation layer, the ingate be communicated with the die cavity of foundry goods is provided with in described running gate system sand mold.Cored-up mould sand mould structure of the present invention can save moulding and the casting cost of foundry goods, reduces the workload of foundry goods postorder machining, enhances productivity.
Description
Technical field
The present invention relates to casting technology field, particularly a kind of cored-up mould sand mould structure of gear box casing foundry goods and cored-up mould method.
Background technology
As shown in Figure 1, conventional foundry goods compares gear box casing casting structure, complex structure, the similar casing that Open Side Down of agent structure, and housing upper surface 1 wall thickness is 50 ~ 250mm, and end face exists many places boss 2,2 '.And case side wall thickness is only 38mm, and below sidewall, have periphery not have several sides boss 3,3 ', above-mentioned boss is the thermal center of housing sidewall, feeding difficulty.
In prior art, produce the casting shrinkage technique of this gear box casing foundry goods as shown in Figure 2, housing upper surface adopts two oval open risers 4,4 ' to carry out feeding, and housing sidewall lower side boss 3,3 ' adopts blind riser 5,5 ' to carry out feeding.The formative method of shell casting adopts entity head-on collision moulding, and mould assembling schematic diagram as shown in Figure 3 divides top box 6 and nowel 7.
Mainly there is following problem in the cored-up mould scheme of this shell casting of the prior art:
1) open riser size is large, the boss shape of housing upper surface has been covered in rising head, has caused upper surface cannot directly cast out boss shape, need machine-shaping, increases processing cost and process-cycle;
2) lower convex platform below housing sidewall adopts blind riser feeding scheme, and foundry goods mold thickness can be caused to increase, and placer iron is than too high, moulding cost increases, and meanwhile adds open riser feeding pressure, causes open riser size to become large, yield rate reduces, and melting cost increases;
3) whole founding method adopts entity head-on collision moulding, and can only produce one one case, production efficiency is low.
Summary of the invention
The present invention is directed to the deficiency of gear box casing foundry goods formative method in prior art, a kind of cored-up mould sand mould structure of gear box casing foundry goods is provided, to save moulding and the casting cost of foundry goods, reduce the workload of foundry goods postorder machining, enhance productivity.
The object of the present invention is achieved like this, a kind of cored-up mould sand mould structure of gear box casing foundry goods, comprise the inner chamber core of cored-up mould, outline core and running gate system sand mold, the die cavity of shell casting is formed after described inner chamber core and outline core mould assembly, some circular rising heads are provided with on the upside of the upper surface of described shell casting, in outline core between described circular rising head, some chills are set, be provided with subsidy in the outline core that side boss side direction below described shell casting sidewall is corresponding, outside described subsidy, be provided with heat-insulation layer; The ingate be communicated with the die cavity of foundry goods is provided with in described running gate system sand mold.
In cored-up mould sand mould structure of the present invention, some little circular rising heads are set in shell casting upper surface, realize the even feeding to boss place thermal center on the upside of foundry goods, and the boss on the upside of foundry goods only has part to be blocked by rising head, the shape casting substantially of boss, do not need to carry out processing process again, shorten the production cycle after casting and processing cost; Boss below foundry goods sidewall adopts subsidy and heat-insulation layer feeding scheme, and can improve feeding efficiency, heat-insulation layer adds subsidy heat-insulating property, improve feeding quality, the consumption of molten casting iron can be reduced relative to blind riser feeding, improve the yield rate of foundry goods, reduce placer iron ratio; The structure of cored-up mould of the present invention does not need moulding top box and nowel respectively, reduces the workload of mould turnover and mould assembling.
As improvement of the present invention, in described outline core, described circular rising head comprises the side riser of the top riser of feeding end face boss, the side riser of feeding sidewall and feeding sidewall and sidewall lower projection, also be provided with transition between described side riser with subsidy and subsidize subsidy passage to be communicated with side riser and side boss, the side direction that described transition is subsidized also is provided with heat-insulation layer.Rising head of the present invention and subsidy method to set up, relative to the method to set up of open riser of the prior art and blind riser, can the accurate each heat energy-saving position needing feeding of feeding foundry goods, foundry goods global tissue structure is evenly densification.
As improvement of the present invention, the curved distribution of each chill between described circular rising head, described chill is of a size of φ 100*150mm.Become the chill of curve distribution, foundry goods can be prevented excessively strong because of iron chill shock chilling, cause linear cracking, extend feeding offset from, the defect between minimizing casting pressing port, make to organize finer and close.
As a further improvement on the present invention, the thickness of described subsidy and transition subsidy is 20 ~ 100mm.
Improve as a step more of the present invention, described running gate system sand mold is arranged at the downside of sandbox, described inner chamber core and outline core are set in turn on the upside of running gate system sand mold, and on the upside of running gate system sand mold, be symmetrical arranged four groups of inner chamber cores and outline core.Cored-up mould structure of the present invention, can simultaneously moulding four groups of casting sand molds, significantly improve the production efficiency of foundry goods cored-up mould and casting.
For ease of accurately playing core to locate, being provided with on the upside of described running gate system sand mold and being convenient to lower core installation inner chamber core, outline core sag recess.
The present invention also provides a kind of cored-up mould method of sand mould structure of above-mentioned gear box casing foundry goods, comprises following process:
1) cored-up mould method is adopted, respectively moulding inner chamber core, outline core and running gate system sand mold;
Described inner chamber core is by the moulding of inner chamber core box quicksand, described outline core is by the moulding of outline core box quicksand, described outline core box comprises core box frame and core box model, described core box model to comprise on the upside of foundry goods outline model, foundry goods outline model upper surface subsidy model corresponding outside corresponding some rising head models of arranging and foundry goods outline model side boss, during quicksand moulding outline core, bury insulating brick underground in the outside of each subsidy model, between rising head model, bury the circular chill of some curved cloth underground;
2) running gate system sand mold is placed on moulding plate, plays core to assemble successively, first lower inner cavity core, then enter outline core under coordinating, and seal with running gate system sand mold seam crossing mud bar bottom inner chamber core and outline core;
3) under, core assembling terminates rear engagement sleeves sand loading case, and running gate system sand mold and the core that respectively assembles are surrounded, then flow silica sand and bury sprue and cup underground, quicksand completes the cored-up mould of gear box casing foundry goods.
As cored-up mould further improvements in methods of the present invention, described process 1) in, when quicksand moulding inner chamber core and outline core, it is the chrome ore that 50-60mm is thick that thickness is flowed at the position contacted with core box model, other floor sand position stream silica sand.
The sand mould structure cored-up mould method of gear box casing foundry goods of the present invention, adopt cored-up mould scheme, case moulding of making no distinction of rank, decreases the workload of mould assembling, and same case can produce four simultaneously, improves production efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of gear box casing foundry goods.
Fig. 2 is the casting shrinkage artwork of gear box casing foundry goods of the prior art.
Fig. 3 is the mould assembling schematic diagram of gear box casing foundry goods of the prior art.
Fig. 4 is the schematic diagram of the outline core box of the group sand molding of gear box casing foundry goods of the present invention.
Fig. 5 is the schematic diagram of the inner chamber core box of the group sand molding of gear box casing foundry goods of the present invention.
Fig. 6 is gear box casing foundry goods outline core box model of the present invention and feeding technology figure.
Fig. 7 is shell casting side boss feeding schematic diagram.
Fig. 8 is the cored-up mould schematic diagram of gear box casing foundry goods of the present invention.
Wherein, 1 housing upper surface; 2,2 ' boss; 3,3 ' side boss; 4,4 ' oval open riser; 5,5 ' blind riser; 6 top boxs; 7 nowels; 8 core box frames; 9 core box models; 901 rising head models; 901A top riser; 901B side riser; 901C side riser; 902 foundry goods outline models; 903 chills; 904 hangers; 905 subsidies; 905A transition is subsidized; 10 inner chamber core boxes; 11 inner chamber cores; 12 outline cores; 13 running gate system sand molds; 13A sinking recess.
Detailed description of the invention
As shown in Fig. 4-Fig. 8, the cored-up mould sand mould structure of gear box casing foundry goods, comprise the inner chamber core 11 of cored-up mould, outline core 12 and running gate system sand mold 13, the die cavity of shell casting is formed after inner chamber core 11 and outline core 12 mould assembly, some circular rising heads are provided with on the upside of the upper surface of shell casting, in outline core between circular rising head, some chills 903 are set, be provided with subsidy 905 in the outline core that side boss side direction below foundry goods sidewall is corresponding, outside subsidy 905, be provided with heat-insulation layer; The ingate be communicated with the die cavity of foundry goods is provided with in running gate system sand mold 13.
For ease of realizing accurate feeding, as Fig. 6 and Fig. 7, in outline core, circular rising head comprises the side riser 901C of the top riser 901A of feeding end face boss, the side riser 901B of feeding sidewall and feeding sidewall and sidewall lower projection, also be provided with transition between side riser 901C with subsidy 905 and subsidize 905A to be communicated with the subsidy passage of side riser and side boss, the side direction of transition subsidy 905A is also provided with heat-insulation layer.Rising head of the present invention and subsidy method to set up, transition subsidy 905A and subsidy 905 have been communicated with the 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, can the accurate each heat energy-saving position needing feeding of feeding foundry goods, foundry goods global tissue structure is evenly densification.
The curved distribution of each chill 903 between circular rising head, chill 903 is of a size of φ 100*150mm, becomes the chill 903 of curve distribution, foundry goods can be prevented excessively strong because of iron chill shock chilling, cause linear cracking, extend feeding offset from, reduce the defect between casting pressing port, make to organize finer and close; The thickness of subsidy is 20 ~ 100mm; Running gate system sand mold 13 is arranged at the downside of sandbox, and inner chamber core 11 and outline core 12 are set in turn on the upside of running gate system sand mold 13, and on the upside of running gate system sand mold 13, be symmetrical arranged four groups of inner chamber cores 11 and outline core 12; For ease of accurately playing core to locate, being provided with on the upside of running gate system sand mold 13 and being convenient to the sinking recess 13A that lower core installs inner chamber core 11, outline core 12.
In cored-up mould sand mould structure of the present invention, some little circular rising head 12A are set in shell casting upper surface, realize the even feeding to boss place thermal center on the upside of foundry goods, and the boss on the upside of foundry goods only has part to be blocked by rising head, the shape casting substantially of boss, do not need to carry out processing process again, shorten the production cycle after casting and processing cost; Side boss below foundry goods sidewall adopts subsidy, transition subsidy feeding scheme, and can improve feeding efficiency, heat-insulation layer adds subsidy heat-insulating property, improve feeding quality, the consumption of molten casting iron can be reduced relative to blind riser feeding, improve the yield rate of foundry goods, reduce placer iron ratio; The structure of cored-up mould of the present invention does not need moulding top box and nowel respectively, reduces the workload of mould turnover and mould assembling.
The cored-up mould method of the sand mould structure of the above-mentioned gear box casing foundry goods of the present invention, comprises following process:
1) cored-up mould method is adopted, respectively moulding inner chamber core 11, outline core 12 and running gate system sand mold 13;
Wherein, inner chamber core 11 is by the moulding of inner chamber core box 10 quicksand, outline core 12 is by the outline core box quicksand moulding shown in Fig. 4, this outline core box comprises core box frame 8 and core box model 9, core box model 9 comprises foundry goods outline model 902, subsidy model 905 corresponding outside corresponding some rising head models 901 of arranging and foundry goods outline model 902 side boss on the upside of foundry goods outline model 902 upper surface, lifting in addition for ease of core box model is carried, the side direction of foundry goods outline model 902 is also provided with several hanger 904 being convenient to handling, during quicksand moulding outline core 12, insulating brick is buried underground in the side direction of each subsidy model, the circular chill 903 of some curved cloth is buried underground between rising head model 901, in addition, for preventing foundry goods scab, when quicksand moulding inner chamber core 11 and outline core 12, it is the chrome ore that 50-60mm is thick that thickness is flowed at the position contacted with core box model, other floor sand position stream silica sand,
2) running gate system sand mold 13 is placed on moulding plate, plays core to assemble successively, first lower inner cavity core 11, then enter outline core 12 under coordinating, and seal with running gate system sand mold 13 seam crossing mud bar bottom inner chamber core 11 and outline core 12;
3) under, core assembling terminates rear engagement sleeves sand loading case, and running gate system sand mold 13 and the core that respectively assembles are surrounded, then flow silica sand and bury sprue and cup underground, quicksand completes the cored-up mould of gear box casing foundry goods.
The sand mould structure cored-up mould method of gear box casing foundry goods of the present invention, adopt cored-up mould scheme, case moulding of making no distinction of rank, decreases the workload of mould assembling, and same case can produce four cast products simultaneously, improves production efficiency.
Claims (8)
1. the cored-up mould sand mould structure of a gear box casing foundry goods, it is characterized in that, comprise the inner chamber core of cored-up mould, outline core and running gate system sand mold, the die cavity of shell casting is formed after described inner chamber core and outline core mould assembly, some circular rising heads are provided with on the upside of the upper surface of described shell casting, in outline core between described circular rising head, some chills are set, be provided with subsidy in the outline core that side boss side direction below described shell casting sidewall is corresponding, outside described subsidy, be provided with heat-insulation layer; The ingate be communicated with the die cavity of foundry goods is provided with in described running gate system sand mold.
2. the cored-up mould sand mould structure of gear box casing foundry goods according to claim 1, it is characterized in that, in described outline core, described circular rising head comprises the side riser of the top riser of feeding end face boss, the side riser of feeding sidewall and feeding sidewall and sidewall lower side boss, also be provided with transition between described side riser with subsidy and subsidize subsidy passage to be communicated with side riser and side boss, the side direction that described transition is subsidized also is provided with heat-insulation layer.
3. the cored-up mould sand mould structure of gear box casing foundry goods according to claim 2, is characterized in that, the curved distribution of each chill between described circular rising head, described chill is of a size of φ 100*150mm.
4. the cored-up mould sand mould structure of gear box casing foundry goods according to claim 2, is characterized in that, the thickness of described subsidy and transition subsidy is 20 ~ 100mm.
5. the cored-up mould sand mould structure of the gear box casing foundry goods according to Claims 2 or 3 or 4, it is characterized in that, described running gate system sand mold is arranged at the downside of sandbox, described inner chamber core and outline core are set in turn on the upside of running gate system sand mold, and on the upside of running gate system sand mold, be symmetrical arranged four groups of inner chamber cores and outline core.
6. a cored-up mould sand mould structure for the gear box casing foundry goods according to any one of claim 1-5, is characterized in that, is provided with and is convenient to lower core installation inner chamber core, outline core sag recess on the upside of described running gate system sand mold.
7. a cored-up mould method for gear box casing casting sand mold structure any one of claim 1-6, is characterized in that, comprise following process:
1) cored-up mould method is adopted, respectively moulding inner chamber core, outline core and running gate system sand mold;
Described inner chamber core is by the moulding of inner chamber core box quicksand, described outline core is by the moulding of outline core box quicksand, described outline core box comprises core box frame and core box model, described core box model to comprise on the upside of foundry goods outline model, foundry goods outline model upper surface corresponding some rising head models of arranging and each subsidy model corresponding to foundry goods outline model side boss side direction, during quicksand moulding outline core, bury insulating brick underground in the side direction of each subsidy model, between rising head model, bury the circular chill of some curved cloth underground;
2) running gate system sand mold is placed on moulding plate, plays core to assemble successively, first lower inner cavity core, then enter outline core under coordinating, and seal with running gate system sand mold seam crossing mud bar bottom inner chamber core and outline core;
3) under, core assembling terminates rear engagement sleeves sand loading case, and running gate system sand mold and the core that respectively assembles are surrounded, then flow silica sand and bury sprue and cup underground, quicksand completes the cored-up mould of gear box casing foundry goods.
8. the cored-up mould method of gear box casing casting sand mold structure according to claim 5, it is characterized in that, described process 1) in, when quicksand moulding inner chamber core and outline core, the chrome ore that thickness is 50-60mm is flowed at the facing sand position contacted with core box model, other floor sand position stream silica sand.
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