CN105149512A - Cavity for small casting overlapping modeling and sand blank for manufacturing cavity for small casting overlapping modeling - Google Patents
Cavity for small casting overlapping modeling and sand blank for manufacturing cavity for small casting overlapping modeling Download PDFInfo
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- CN105149512A CN105149512A CN201510620595.5A CN201510620595A CN105149512A CN 105149512 A CN105149512 A CN 105149512A CN 201510620595 A CN201510620595 A CN 201510620595A CN 105149512 A CN105149512 A CN 105149512A
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Abstract
A cavity for small casting overlapping modeling comprises a casting cavity, a pouring system cavity and an air outlet system cavity. The pouring system cavity is connected with the casting cavity. The air outlet system cavity is arranged above the casting cavity and connected with the casting cavity. The casting cavity comprises an upper cavity body, a middle cavity body and a lower cavity body which are horizontally stacked but not connected. By means of independent air outlet and layering flow inlet of all layers of the cavity bodies, an air outlet system does not conflict with a pouring system. During pouring, molten iron flows stably and slowly, the phenomenon of mixed convection of air and molten iron does not exist, and the contact area of the magnesium element and air is reduced, and the probability of oxidation of the magnesium element is reduced. The invention further provides a sand blank for manufacturing the cavity for small casting overlapping modeling.
Description
Technical field
The present invention relates to folded core sand moulding technical field in sand casting, particularly relate to a kind of smallclothes and fold core sand moulding die cavity and manufacture the sand base that core sand moulding die cavity folded by smallclothes.
Background technology
Main beating cap is one of key components and parts in medium speed diesel engines, and material is spheroidal graphite cast-iron, for nodular iron casting, because nodularization element magnesium is abnormal active, is very easy to and oxygen element generation oxidation reaction in air, forms oxidizing slag.
Because the piece weight of main beating cap is less, generally only has 30kg ~ 150kg, the folded core sand moulding of one case more than one piece is generally taked to cast, during folded core sand moulding in casting process, lower floor's die cavity is up vented, upper strata die cavity down pours in down a chimney molten iron, the oxygen element contact area of the magnesium elements in molten iron and air is exaggerated, more exacerbate the oxidation of magnesium, form oxidizing slag, these oxidizing slags finally float over the molten iron surface of upper strata die cavity, the very shallow position in below the surface of foundry goods or surface is stayed in process of setting, it is dirtier that the foundry goods of upper strata die cavity there will be surface usually, the underproof defect of MT, cause the overall percent defective of the folded core sand moulding of one case more than one piece higher, usually all more than 30%.
Summary of the invention
Be necessary that proposing a kind of smallclothes that the exhaust passage of foundry goods die cavity and the cast passage of molten iron separate when pouring into a mould folds core sand moulding die cavity.
There is a need to provide a kind of and manufacture the sand base that core sand moulding die cavity folded by smallclothes.
A kind of smallclothes are folded core sand moulding die cavity and are comprised foundry goods die cavity, running gate system die cavity, system of giving vent to anger die cavity, described foundry goods die cavity is arranged on the both sides of running gate system die cavity, and be connected with running gate system die cavity, described running gate system die cavity is connected with foundry goods die cavity, described system die cavity of giving vent to anger is arranged on the top of foundry goods die cavity and is connected with foundry goods die cavity, described foundry goods die cavity comprises level and stacks and mutually discrete lower floor die cavity, middle level die cavity, upper strata die cavity, described lower floor die cavity, middle level die cavity, upper strata die cavity is separately positioned on the both sides of running gate system die cavity, and be connected with running gate system die cavity, described system die cavity of giving vent to anger comprises lower floor and to give vent to anger system die cavity, give vent to anger system die cavity in middle level, give vent to anger system die cavity in upper strata, described lower floor gives vent to anger system die cavity, give vent to anger system die cavity in middle level, upper strata system die cavity of giving vent to anger is fixedly installed on described lower floor die cavity respectively, middle level die cavity, the top of upper strata die cavity and connecting respectively.
A kind ofly manufacture the sand base that smallclothes fold core sand moulding die cavity and comprise the first casting mold unit, second casting mold unit, 3rd casting mold unit, 4th casting mold unit, described first casting mold unit, second casting mold unit, 3rd casting mold unit, the internal cavities of 4th casting mold unit successively from bottom to top after core assembly is smallclothes and folds core sand moulding die cavity, the upper surface of the first casting mold unit is arranged the lower profile of lower floor's die cavity, the lower surface of the second casting mold unit is arranged the upper profile of lower floor's die cavity, the part that running gate system die cavity is connected with lower floor die cavity, the upper surface of the second casting mold unit is arranged the lower profile of middle level die cavity, the part that running gate system die cavity is connected with middle level die cavity, the lower surface of the 3rd casting mold unit is arranged the upper profile of middle level die cavity, the part that running gate system die cavity is connected with middle level die cavity, the upper surface of the 3rd casting mold unit is arranged the lower profile of upper strata die cavity, the part that running gate system die cavity is connected with upper strata die cavity, the lower surface of the 4th casting mold unit is arranged the upper profile of upper strata die cavity, at described second casting mold unit, 3rd casting mold unit, the inside of the 4th casting mold unit arranges system type chamber of giving vent to anger.
The present invention is given vent to anger separately by each stratotype chamber, layering influent stream, system of giving vent to anger and running gate system are not conflicted, during cast, molten iron flow is steadily slow, there is not the mixed convection phenomenon of gas and molten iron, decrease the area that magnesium elements contacts with air, reduce the probability that magnesium elements is oxidized, thus realizing Section Ductile Iron Castings, to fold core sand moulding one case more than one piece quality homogeneous, stable, month percent defective≤3%, indivedual month even reaches zero waste product.
Accompanying drawing explanation
Fig. 1 is the structural representation that core sand moulding die cavity folded by smallclothes.
Fig. 2 manufactures the structural representation that the first casting mold unit of the sand base of core sand moulding die cavity folded by smallclothes.
Fig. 3 manufactures the structural representation that the second casting mold unit of the sand base of core sand moulding die cavity folded by smallclothes.
Fig. 4 manufactures the structural representation that the 3rd casting mold unit of the sand base of core sand moulding die cavity folded by smallclothes.
Fig. 5 manufactures the structural representation that the 4th casting mold unit of the sand base of core sand moulding die cavity folded by smallclothes.
Fig. 6 manufactures the 4th casting mold unit that smallclothes fold the sand base of core sand moulding die cavity to comprise the structural representation that gas collection blocks up core.
In figure: foundry goods die cavity 10, lower floor's die cavity 101, middle level die cavity 102, upper strata die cavity 103, running gate system die cavity 20, system of giving vent to anger die cavity 30, lower floor's outlet passageway 301, middle level outlet passageway 302, upper strata outlet passageway 303, the vertical section 304 of low side, traversing section 305, high-end vertical section 306, anti-band meat part 307, first casting mold unit 40, second casting mold unit 50, 3rd casting mold unit 60, 4th casting mold unit 70, gas collection district 701, gas collection blocks up core 702, gas outlet 703, sand cleaning hole 80.
Detailed description of the invention
The present invention may be used for the casting die cavity of main beating cap.
Please refer to Fig. 1 to Fig. 6, smallclothes are folded core sand moulding die cavity and are comprised foundry goods die cavity 10, running gate system die cavity 20, system of giving vent to anger die cavity 30, described foundry goods die cavity 10 is arranged on the both sides of running gate system die cavity 20, and be connected with running gate system die cavity 20, system of giving vent to anger die cavity 30 is arranged on the top of foundry goods die cavity 10 and is connected with foundry goods die cavity 10, foundry goods die cavity 10 comprises level and stacks and mutually do not connect, discontiguous lower floor die cavity 101, middle level die cavity 102, upper strata die cavity 103, lower floor's die cavity 101, middle level die cavity 102, upper strata die cavity 103 is separately positioned on the both sides of running gate system die cavity 20, and be connected with running gate system die cavity 20, system of giving vent to anger die cavity 30 comprises lower floor and to give vent to anger system die cavity, give vent to anger system die cavity in middle level, give vent to anger system die cavity in upper strata, this lower floor gives vent to anger system die cavity, give vent to anger system die cavity in middle level, upper strata system die cavity of giving vent to anger is fixedly installed on lower floor's die cavity 101 respectively, middle level die cavity 102, the top of upper strata die cavity 103 and connecting respectively.That is: lower floor gives vent to anger, and system die cavity is connected with lower floor die cavity 101, giving vent to anger in middle level, system die cavity is connected with middle level die cavity 102, giving vent to anger in upper strata, system die cavity is connected with upper strata die cavity 103, certainly, connotation of the present invention is confined to the three-decker on lower floor, middle level, upper strata incessantly, can be by that analogy, foundry goods die cavity can be increased above upper strata die cavity 103, increase system of the giving vent to anger die cavity be connected with foundry goods die cavity and running gate system die cavity simultaneously.
Running gate system die cavity 20 comprises sprue, the cross gate be connected with sprue, multiple ingates of being connected with cross gate, lower floor's die cavity 101, middle level die cavity 102, upper strata die cavity 103 connect one end of ingate respectively, the other end of ingate connects cross gate, iron liquid flows into cross gate, ingate, foundry goods die cavity successively from sprue, completes cast.
When pouring into a mould, the molten iron entering running gate system die cavity 20 enters foundry goods die cavity 10 from running gate system die cavity 20 and the junction of foundry goods die cavity 10, enter lower floor's die cavity 101, middle level die cavity 102, upper strata die cavity 103, and molten iron slowly overflow from the bottom up in foundry goods die cavity 10, system of the giving vent to anger die cavity 30 connected above air in foundry goods die cavity 10 discharges the external world, every one deck foundry goods die cavity adopts independent exhaust passage, same outlet passageway is used compared to multilayer die cavity, be independent of each other mutually, the influent stream passage of molten iron like this and the passing away of air are not passages, there is not molten iron to conflict with air, the problem of convection current, the air discharging channel of every one deck is non-interference, molten iron slowly enters foundry goods die cavity, air is discharged the external world, the area that air contacts with molten iron is less, the oxidized probability of magnesium elements is also less, the oxidizing slag formed is little, even do not have, realizing Section Ductile Iron Castings, to fold core sand moulding one case more than one piece quality homogeneous, stable.
Further, lower floor's system die cavity of giving vent to anger comprises multiple lower floor's outlet passageway 301 being evenly arranged on the upper surface of lower floor's die cavity 101, lower floor's outlet passageway 301 is in " Z " type bending shape, the bending of " Z " type comprises the vertical section of the low side connected successively from bottom to top 304, traversing section 305, high-end vertical section 306, the vertical section 304 of low side of lower floor's outlet passageway 301 is connected with the upper surface of lower floor die cavity 101, and the high-end vertical section 306 of lower floor's outlet passageway 301 does not all contact with middle level die cavity 102, upper strata die cavity 103.
Middle level system die cavity of giving vent to anger comprises multiple middle level outlet passageway 302 being evenly arranged on the upper surface of middle level die cavity 102, middle level outlet passageway 302 is in " Z " type bending shape, the bending of " Z " type comprises the vertical section of the low side connected successively from bottom to top 304, traversing section 305, high-end vertical section 306, the vertical section 304 of low side of middle level outlet passageway 302 is connected with the upper surface of middle level die cavity 102, and the high-end vertical section 306 of middle level outlet passageway 302 does not contact with upper strata die cavity 103.
Upper strata system die cavity of giving vent to anger comprises multiple upper strata outlet passageway 303 being evenly arranged on the upper surface of upper strata die cavity 103.
The high-end vertical section 306 of the high-end vertical section 306 of lower floor's outlet passageway 301, the high-end vertical section 306 of middle level outlet passageway 302, upper strata outlet passageway 303 all extends upwardly to the height of the upper surface exceeding upper strata die cavity 103, discharges to make the gas in die cavity.
When needing to remove outlet passageway after casting pouring terminates, in order to avoid outlet passageway be directly connected with casting mold time, outlet passageway and foundry goods junction can not form smooth section, outlet passageway is often taken away a part for foundry goods body while abate, cause the defect of foundry goods, lower floor of the present invention outlet passageway 301, middle level outlet passageway 302, the vertical section of low side 304 of upper strata outlet passageway 303 is connected with the upper surface of foundry goods die cavity by anti-band meat part 307, this anti-band meat part 307 is in partially flat square or cuboid, its horizontal section area is greater than the area of section of outlet passageway, when needing to remove outlet passageway after casting pouring terminates, manually beat outlet passageway can very easily outlet passageway be separated with anti-band meat part 307, then carry out manual grinding to anti-band meat part 307 to be removed, so can ensure the smooth of the cross section that outlet passageway is separated with foundry goods body, the quality of foundry goods can not be affected.
Wherein, the length of the traversing section 305 of " Z " type bending is 25mm ~ 70mm, to make the high-end vertical section 306 of lower floor's outlet passageway 301 avoid to occupy upper strata die cavity 103, middle level die cavity 102 and technique chill above it, running gate system die cavity 20, the high-end vertical section 306 of middle level outlet passageway 302 is avoided occuping the upper strata die cavity 103 above it and technique chill, running gate system die cavity.And, the high-end vertical section 306 of lower floor's outlet passageway 301 is not less than 20mm apart from the horizontal range of middle level die cavity 102 and upper strata die cavity 103, the high-end vertical section 306 of middle level outlet passageway 302 is not less than 20mm apart from the horizontal range of upper strata die cavity 103, to ensure sufficient mold thickness between outlet passageway and foundry goods die cavity 10.
Further, the vertical section of low side 304 adopts cambered surface chamfered transition to be connected with traversing section 305 and/or between traversing section 305 with high-end vertical section 306, when the diameter of outlet passageway is 15mm, preferred cambered surface radius is 25mm, when molten iron is poured into a mould, air in die cavity sharply expands from outlet passageway and discharges, the air of now discharging has great impact power, the design that cambered surface chamfered transition connects, the impact of air stream to the sand of outlet passageway sidewall can be reduced, prevent drop, after molten iron is full of die cavity, unnecessary molten iron also can overflow from outlet passageway, the drop that the sand that molten iron in like manner also can be avoided to impact outlet passageway sidewall causes or knockout.
Smallclothes of the present invention are folded core sand moulding die cavity and are obtained by the moulding of special casting mold sand base, the sand base that core sand moulding die cavity folded by these manufacture smallclothes comprises the first casting mold unit 40, second casting mold unit 50, 3rd casting mold unit 60, 4th casting mold unit 70, by the first casting mold unit 40, second casting mold unit 50, 3rd casting mold unit 60, the internal cavities of 4th casting mold unit 70 successively from bottom to top after core assembly is smallclothes and folds core sand moulding die cavity, the lower surface of the first casting mold unit 40 is for supporting this casting mold sand base, the upper surface of the first casting mold unit 40 is arranged the lower profile of lower floor's die cavity 101, the lower surface of the second casting mold unit 50 is arranged the upper profile of lower floor's die cavity 101, the part that running gate system die cavity 20 is connected with lower floor die cavity 101, the upper surface of the second casting mold unit 50 is arranged the lower profile of middle level die cavity 102, the part that running gate system die cavity 20 is connected with middle level die cavity 102, the lower surface of the 3rd casting mold unit 60 is arranged the upper profile of middle level die cavity 102, the part that running gate system die cavity 20 is connected with middle level die cavity 102, the upper surface of the 3rd casting mold unit 60 is arranged the lower profile of upper strata die cavity 103, the part that running gate system die cavity 20 is connected with upper strata die cavity 103, the lower surface of the 4th casting mold unit 70 is arranged the upper profile of upper strata die cavity 103, the upper surface of the 4th casting mold unit 70 is for supporting this casting mold sand base.
System of giving vent to anger die cavity 30 is arranged on the inside of the second casting mold unit 50, the 3rd casting mold unit 60, the 4th casting mold unit 70.
The give vent to anger vertical section 304 of low side of multiple lower floors outlet passageway 301 of system die cavity of lower floor is connected with lower floor die cavity 101, after the horizontal-extending of traversing section 305 in the second casting mold unit, high-end vertical section 306 passes from the upper surface of the second casting mold unit 50, the high-end vertical section 306 of system die cavity is given vent to anger along vertical direction successively through the second casting mold unit 50 by this lower floor, 3rd casting mold unit 60, 4th casting mold unit 70 is in communication with the outside, thus make the air in lower floor's die cavity 101 directly discharge the external world along give vent to anger lower floor's outlet passageway 301 of system die cavity of lower floor, this lower floor give vent to anger system die cavity lower floor's outlet passageway 301 all not with middle level die cavity 102, upper strata die cavity 103 connects.Because lower floor's outlet passageway 301 of system die cavity is given vent to anger in " Z " type bending shape by lower floor, traversing section 305 is owing to being the passage that turns round, the very inconvenient operation when sand removal, so offer sand cleaning hole 80 on the sidewall of just right the second casting mold unit 50 of traversing section 305, this sand cleaning hole 80 is just to traversing section 305, because lower floor's die cavity 101 is two the casting mold die cavities being arranged on running gate system die cavity both sides, namely be the die cavity of two main beating cap, each die cavity is symmetrical arranged four lower floor's outlet passageways 301, wherein two are set to " Z " type bending shape, so, second casting mold unit 50 is offered sand cleaning hole 80 altogether everywhere, sand removal terminates rear use sand cleaning hole and blocks up core by bonding for sand cleaning hole 80 shutoff.
The give vent to anger vertical section 304 of low side of multiple middle levels outlet passageway 302 of system die cavity of middle level is connected with middle level die cavity 102, through traversing section 305 after the horizontal-extending of the 3rd casting mold unit, high-end vertical section 306 passes from the upper surface of the 3rd casting mold unit 60, the high-end vertical section 306 of system die cavity is given vent to anger along vertical direction through the 3rd casting mold unit 60 in this middle level, 4th casting mold unit 70 is in communication with the outside, thus make give vent to anger along the middle level middle level outlet passageway 302 of system die cavity of the air in middle level die cavity 102 directly discharge the external world, the give vent to anger middle level outlet passageway 302 of system die cavity of this middle level is not all connected with upper strata die cavity 103.In like manner, middle level die cavity 102 comprises two main beating cap die cavities of setting, each die cavity is arranged four middle level outlet passageways 302, each middle level outlet passageway 302 is all in " Z " type bending shape, conveniently sand removal, also on the sidewall of the 3rd casting mold unit 60, offer the sand cleaning hole 80 identical with lower floor outlet passageway 301, the 3rd casting mold unit 60 is offered eight place's sand cleaning holes 80 altogether, and sand removal terminates rear use sand cleaning hole and blocks up core by bonding for sand cleaning hole 80 shutoff.
Give vent to anger multiple upper stratas outlet passageway 303 of system die cavity of upper strata is connected with upper strata die cavity 103, then passes from the upper surface of the 4th casting mold unit 70 and is in communication with the outside.
At the first casting mold unit 40, second casting mold unit 50, 3rd casting mold unit 60, also to fill out by sand after 4th casting mold unit 70 core assembly, to rise type to prevent casting mold sand base, due to multiple lower floors outlet passageway 301, multiple middle levels outlet passageway 302, multiple upper stratas outlet passageway 303 is all through the upper surface of the first casting mold unit 40, the upper surface of the first casting mold unit 40 is formed multiple go out core, in order to prevent entering sand filling out intraocular of being given vent to anger during sand, the core that goes out of the upper surface of the first casting mold unit 40 is divided into a few gas collection district 701 according to position is contiguous, such as three are gone out core and be divided into a gas collection district 701, blocking up core 702 with the gas collection of gas collection district 701 mating shapes covers in gas collection district 701, block up at gas collection and core 702 offers a gas outlet 703 and go out core with three in gas collection district 701 and be communicated with, the external world is discharged to from gas outlet 703 with the air making three intraoculars of giving vent to anger discharge, so greatly reduce out the quantity of core, avoided gas collection during sand and blocked up gas outlet 703 on core 702 filling out.
Certainly, the foundry goods die cavity that the present invention is also applicable to be connected with running gate system is at least one group, the foundry goods die cavity such as, be connected with running gate system in the present invention is two groups, that is: the foundry goods die cavity being arranged on running gate system both sides is two groups, these two groups of cast system can be symmetrical or asymmetric, by that analogy, also comprising the foundry goods die cavity be connected with running gate system is one group, three groups or many groups, often organize foundry goods die cavity and there is independent system of giving vent to anger, the concrete structure of system of giving vent to anger is same as the structure in the present invention, and, smallclothes fold core sand moulding die cavity sand base also by corresponding one or more groups, to produce one or more groups foundry goods die cavity.
Claims (10)
1. core sand moulding die cavity folded by smallclothes, it is characterized in that: comprise foundry goods die cavity, running gate system die cavity, system of giving vent to anger die cavity, described foundry goods die cavity is arranged on the both sides of running gate system die cavity, and be connected with running gate system die cavity, described system die cavity of giving vent to anger is arranged on the top of foundry goods die cavity and is connected with foundry goods die cavity, described foundry goods die cavity comprises level and stacks and mutually discrete lower floor die cavity, middle level die cavity, upper strata die cavity, described lower floor die cavity, middle level die cavity, upper strata die cavity is separately positioned on the both sides of running gate system die cavity, and be connected with running gate system die cavity, described system die cavity of giving vent to anger comprises lower floor and to give vent to anger system die cavity, give vent to anger system die cavity in middle level, give vent to anger system die cavity in upper strata, described lower floor gives vent to anger system die cavity, give vent to anger system die cavity in middle level, upper strata system die cavity of giving vent to anger is fixedly installed on described lower floor die cavity respectively, middle level die cavity, the top of upper strata die cavity and connecting respectively.
2. core sand moulding die cavity folded by smallclothes as claimed in claim 1, it is characterized in that: described lower floor system die cavity of giving vent to anger comprises multiple lower floor's outlet passageway being evenly arranged on the upper surface of described lower floor die cavity, described lower floor outlet passageway is in " Z " type bending shape, the bending of described " Z " type comprises the vertical section of the low side connected successively from bottom to top, traversing section, high-end vertical section, the vertical section of low side of described lower floor outlet passageway is connected with the upper surface of lower floor's die cavity, the high-end vertical section of described lower floor outlet passageway and described middle level die cavity, upper strata die cavity does not all contact, described middle level system die cavity of giving vent to anger comprises multiple middle level outlet passageway being evenly arranged on the upper surface of described middle level die cavity, described middle level outlet passageway is in " Z " type bending shape, the bending of described " Z " type comprises the vertical section of the low side connected successively from bottom to top, traversing section, high-end vertical section, the vertical section of low side of described middle level outlet passageway is connected with the upper surface of middle level die cavity, the high-end vertical section of described middle level outlet passageway does not contact with described upper strata die cavity, described upper strata system die cavity of giving vent to anger comprises multiple upper strata outlet passageway being evenly arranged on the upper surface of described upper strata die cavity.
3. core sand moulding die cavity folded by smallclothes as claimed in claim 2, it is characterized in that: the length of the traversing section of described " Z " type bending is 25mm ~ 70mm, to make described high-end vertical section avoid to occupy middle level die cavity above it and/or upper strata die cavity, running gate system die cavity.
4. core sand moulding die cavity folded by smallclothes as claimed in claim 2, it is characterized in that: described in the high-end vertical segment distance of described " Z " type bending, the horizontal range of middle level die cavity and/or upper strata die cavity is not less than 20mm.
5. core sand moulding die cavity folded by smallclothes as claimed in claim 2, it is characterized in that: the vertical section of described low side adopts cambered surface chamfered transition to be connected with traversing section and/or between traversing section with high-end vertical section, and described cambered surface radius is 25mm.
6. manufacture the sand base that core sand moulding die cavity folded by smallclothes, it is characterized in that: comprise the first casting mold unit, second casting mold unit, 3rd casting mold unit, 4th casting mold unit, described first casting mold unit, second casting mold unit, 3rd casting mold unit, the internal cavities of 4th casting mold unit successively from bottom to top after core assembly is smallclothes and folds core sand moulding die cavity, the upper surface of the first casting mold unit is arranged the lower profile of lower floor's die cavity, the lower surface of the second casting mold unit is arranged the upper profile of lower floor's die cavity, the part that running gate system die cavity is connected with lower floor die cavity, the upper surface of the second casting mold unit is arranged the lower profile of middle level die cavity, the part that running gate system die cavity is connected with middle level die cavity, the lower surface of the 3rd casting mold unit is arranged the upper profile of middle level die cavity, the part that running gate system die cavity is connected with middle level die cavity, the upper surface of the 3rd casting mold unit is arranged the lower profile of upper strata die cavity, the part that running gate system die cavity is connected with upper strata die cavity, the lower surface of the 4th casting mold unit is arranged the upper profile of upper strata die cavity, at described second casting mold unit, 3rd casting mold unit, the inside of the 4th casting mold unit arranges system type chamber of giving vent to anger.
7. the sand base of core sand moulding die cavity folded by manufacture smallclothes as claimed in claim 6, it is characterized in that: the vertical section of low side of described lower floor outlet passageway is connected with lower floor die cavity, traversing section is in the second casting mold unit after horizontal-extending, high-end vertical section passes from the upper surface of the second casting mold unit, is in communication with the outside successively along vertical direction through the second casting mold unit, the 3rd casting mold unit, the 4th casting mold unit.
8. the sand base of core sand moulding die cavity folded by manufacture smallclothes as claimed in claim 6, it is characterized in that: the vertical section of low side of described middle level outlet passageway is connected with middle level die cavity, traversing section is in the 3rd casting mold unit after horizontal-extending, high-end vertical section passes from the upper surface of the 3rd casting mold unit, is in communication with the outside successively along vertical direction through the 3rd casting mold unit, the 4th casting mold unit.
9. the sand base of core sand moulding die cavity folded by manufacture smallclothes as claimed in claim 6, it is characterized in that: on the upper surface of described first casting mold unit, gas collection district is set, described gas collection district covers at least two outlet passageways, the gas collection matched with gas collection district blocks up core cap and is combined in described gas collection district, and described gas collection district offers a gas outlet be connected with outlet passageway.
10. manufacture the sand base that core sand moulding die cavity folded by smallclothes as claimed in claim 7 or 8, it is characterized in that: the sidewall of the second casting mold unit faced at the traversing section of described lower floor outlet passageway offers sand cleaning hole, the sidewall of the 3rd casting mold unit faced at the traversing section of described middle level outlet passageway offers sand cleaning hole.
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| CN201510620595.5A CN105149512B (en) | 2015-09-27 | 2015-09-27 | Cavity for small casting overlapping modeling and sand blank for manufacturing cavity for small casting overlapping modeling |
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| CN201510620595.5A CN105149512B (en) | 2015-09-27 | 2015-09-27 | Cavity for small casting overlapping modeling and sand blank for manufacturing cavity for small casting overlapping modeling |
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