CN106001418B - A kind of casting exhaust apparatus and the device producing method - Google Patents

A kind of casting exhaust apparatus and the device producing method Download PDF

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Publication number
CN106001418B
CN106001418B CN201610575659.9A CN201610575659A CN106001418B CN 106001418 B CN106001418 B CN 106001418B CN 201610575659 A CN201610575659 A CN 201610575659A CN 106001418 B CN106001418 B CN 106001418B
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cell
exhaust
casting
refractory
sand mold
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CN106001418A (en
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祝建勋
赵国庆
马业斌
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JINAN SHENGQUAN BEIJIN CERAMIC FILTER CO Ltd
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JINAN SHENGQUAN BEIJIN CERAMIC FILTER CO Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings

Abstract

A kind of casting exhaust apparatus and the device producing method, including:Cell structure is embedded in sand mold, is made of granular refractory material, is bonded between the particle and particle of refractory material by binding agent, and the irregular gas outlet channels in aperture and gas vent are formed after the particle packing of refractory material.This casting with the tail end of exhaust apparatus and steel pipe is embedded in sand mold together in advance, extracts steel pipe out afterwards, gas vent is formed in sand mold, it is easy to operate, it can effectively stop knockout, the ratio of the cast(ing) surface burning into sand defect caused by knockout is greatly decreased.The gas generated when pouring in cavity can smoothly pass over each gas outlet channels discharge of cell structure, reduce casting and stomata occur and fill the occurrence probability of the incomplete defect of type.And after the gas discharge in casting mold, molten metal is due to the stop of cell structure, it is impossible to be flowed out, reduced subsequently to the manufacturing procedure of this part cutting by gas vent.

Description

A kind of casting exhaust apparatus and the device producing method
Technical field
The present invention relates to casting technology fields, and in particular to a kind of casting exhaust apparatus and the device producing method.
Background technology
In casting process, whether sand casting or other types casting, exhaust is all needed to be considered.Its gas Source mainly has:(a)The cavity interior gas having in itself;(b)During casting, binding agent runs into high-temperature liquid metal volatilization and generates largely Gas;(c)Moisture vaporizes under high temperature action in molding sand generates substantial amounts of vapor;(d)The gas being involved in during casting in molten metal Body.If exhaust is not smooth, the fire that can choke in casting process causes the splashing of aluminium alloy, can increase pressure in casting mold, causes gold Belong to liquid constricted flow, casting generates the casting flaws such as substantial amounts of stomata and misrun.
At present, main exhaust technological measure is mainly in casting mold upper surface design technology gas vent in sand casting, directly Cavity and air are connected, when setting gas vent, the sand being vented in order to prevent on hole wall drops, it is necessary to using steel pipe, ceramics Pipe or glass tube etc. are embedded in sand mold.And in the actual batch production of foundry, general casting mold is not to pour into a mould simultaneously, Some need is poured into a mould every other day or every class, and loose sand, which is easy to fall into cavity, causes casting burning into sand defect, and after casting, molten metal Gas vent can be entered, the part metals into gas vent need polishing to clear up after solidification.
CN 104384445A provide a kind of vent structure, and this gas vent is divided into main exhaust section, changeover portion, top The parts such as exhaust end, sand nest, solve the disadvantage that loose sand directly falls into cavity, reduce the burning into sand defect of casting.
This exhaust structure can effectively solve current loose sand and easily fall into cavity, but have following shortcoming:(a)Knot Structure is more complicated, cumbersome when making;(b)After casting, molten metal is easily accessible gas vent, needs to increase this portion in the later stage The processes such as the cutting of position;(c)Reduce yield rate.
CN 104801666A provide a kind of casting mould exhaust apparatus, including workbench, including shaping box, sand mo(u)ld, pour Pipe, gas vent, connecting tube, cylinder mounting base, cylinder, evacuation cylinder mounting base are noted, evacuates cylinder, cooling water pipe, with prior art phase Than while metal hydraulic enters sand mo(u)ld cavity from gate spool, the piston that cylinder band is evacuated in cylinder is turned right movement, by sand mo(u)ld type Air extraction in chamber may be such that in sand mo(u)ld cavity in vacuum state, penetrate into metal liquid, ensure so as to avoid air The quality of cast member, and the flowing velocity of metal liquid can be increased, under the action of cooling water pipe so that metal liquid energy It is quickly cooled down, improves casting efficiency, the apparatus structure is simple, can increase casting efficiency, ensure that castability.
This scenario-frame is complicated, and cost of manufacture is high, and cumbersome, exploitativeness is poor.
CN 101612646B provide a kind of air release plates and the production method of clean casting, air release plates are resistance to including one piece Fiery fiber cloth/felt and the stent that the refractory fiber cloth/felt is fixed made of refractory material or precoated sand, the refractory fibre The material of cloth/felt is carbon fiber, high silica fiber and/or alumina silicate fibre, and the stent is hollow tube-shape stent, described resistance to Fiery fiber cloth/felt is fixed on the one or both ends of tubular, and the barrel of the tubular stent is using pore space structure, by refractory fibre Cloth/felt encloses.
This air release plates are mainly that a kind of hollow tube-shape stent and one layer of refractory fiber cloth/felt are formed, hollow tube-shape stent Material formed for refractory material or precoated sand.Its shortcoming is that the technique for being molded hollow stent is cumbersome, it is necessary to complicated Mold and complicated manufacture craft.
The content of the invention
To overcome the above deficiencies, the invention provides a kind of simple in structure, easy to use, reduction following process Process, the casting exhaust apparatus and the device producing method for improving casting yield rate.
Technical solution is used by the present invention overcomes its technical problem:
A kind of casting exhaust apparatus, including:Cell structure is embedded in sand mold, by granular refractory material It is made, is bonded between the particle and particle of refractory material by binding agent, aperture is formed after the particle packing of refractory material and is not advised Gas outlet channels then;And exhaust apparatus, it is arranged in sand mold and is connected with cell structure, exhaust apparatus will be through gas The gas of body passing away discharge is discharged to the outside in environment or stores.
Above-mentioned exhaust apparatus be gas vent, be arranged in sand mold, tail end is connected with cell structure, head end with outside Portion's environment conducting.
In order to be set suitable for limited space the sand mold of gas vent, above-mentioned exhaust apparatus is to be arranged at porous structure The closed air storing cavity in internal portion.
Above-mentioned refractory material is foundry quartz sand.
The particle of above-mentioned refractory material is spherical or near-spherical.
For smooth in exhaust, the particle outer diameter of above-mentioned refractory material is more than or equal to 0.3mm.
Above-mentioned binding agent is organic binder bond or inorganic binder.
Molten metal enters in the gas outlet channels in cell structure in order to prevent, further includes refractory fiber floor, buries It is placed in sand mold, and between casting and cell structure, the cavity surface of refractory fiber floor medial surface and sand mold coincides, institute It states refractory fiber floor to obstruct metal liquid, the gas for casting generation is discharged by refractory fiber floor.
It is vented to make to be inconvenient to the position for setting vent, further includes and be embedded in several exhaust apparatus in sand mold, institute It states exhaust apparatus to be made of cell structure, the cell structure is internally provided with closed air storing cavity.
A kind of method 1 for manufacturing above-mentioned casting exhaust apparatus:
A) it is 100 by ratio:The quartz sand and cold box resin of 1-2 is added in sand mixer and mixed 1-2 minutes;
B) pour the mixture into model, using triethylamine curing and demolding, cell structure is made;
C) cell structure and steel pipe tail end fix, and the two is embedded in sand mold when making sand mold, is extracted out afterwards Steel pipe makes to form the gas vent being connected with cell structure in sand mold.
Molten metal enters in the gas outlet channels in cell structure in order to prevent, by porous structure made of step b) The refractory fiber paper of layer thickness 1-3mm is adhered to cell structure surface, is formed after dry solid by the surface coating waterglass of body Due to the refractory fiber floor on cell structure.
A kind of method 2 for manufacturing above-mentioned casting exhaust apparatus,
A) ceramic powder, the binding agent of 1-9,70-95 refractory particle that mass fraction is 1-9 are uniformly mixed;
B) pour the mixture into model, be heated to 100-200 DEG C it is 30-60 minutes dry;
C) cell structure is made after 1200-1550 DEG C of sintering is heated to after dried mixture is demoulded;
D) cell structure and steel pipe tail end are fixed, the two is embedded in sand mold when making sand mold, Zhi Hou The exhaust apparatus being connected with cell structure is made in sand mold.
Molten metal enters in the gas outlet channels in cell structure in order to prevent, by porous structure made of step c) The refractory fiber paper of layer thickness 1-3mm is adhered to cell structure surface, is formed after dry solid by the surface coating waterglass of body Due to the refractory fiber floor on cell structure.
The beneficial effects of the invention are as follows:This casting is embedded in sand mold together with the tail end of exhaust apparatus and steel pipe in advance It is interior, it extracts steel pipe out afterwards, gas vent is formed in sand mold, it is easy to operate, it can effectively stop knockout, be greatly decreased because knockout causes Cast(ing) surface burning into sand defect ratio.The gas generated when pouring in cavity can smoothly pass over each of cell structure Gas outlet channels are discharged, and reduce casting and stomata occur and fill the occurrence probability of the incomplete defect of type.And in casting mold After gas discharge, molten metal is due to the stop of cell structure, it is impossible to be flowed out by gas vent, reduce and subsequently this part is cut The manufacturing procedure cut, improves product yield.
Description of the drawings
Fig. 1 is the cross-sectional view of casting exhaust apparatus of the invention;
Fig. 2 is the exhaust apparatus cross-sectional view in casting exhaust apparatus of the invention;
In figure, 1. casting, 2. sand mold, 3. refractory fiber floor, 4. cell structure, 5. gas vent, 6. air storing cavity.
Specific embodiment
Below in conjunction with the accompanying drawings 1, the present invention will be further described for attached drawing 2.
A kind of casting exhaust apparatus, including:Cell structure 4 is embedded in sand mold 2, by granular fire proofed wood Material is made, and is bonded between the particle and particle of refractory material by binding agent, and aperture is formed not after the particle packing of refractory material The gas outlet channels of rule;Exhaust apparatus is arranged in sand mold 2 and is connected with cell structure 4, and exhaust apparatus will be through gas The gas of body passing away discharge is discharged to the outside in environment or stores.This casting is embedded in sand mold 2 with exhaust apparatus in advance It is interior, and exhaust apparatus is set, it is easy to operate.The gas generated when pouring in cavity can smoothly pass over cell structure 4 Each gas outlet channels are discharged at exhaust apparatus, reduce casting occur stomata and fill the incomplete defect of type appearance it is several Rate.And after the gas discharge in casting mold, molten metal is due to the stop of cell structure 4, it is impossible to be flowed out, reduced by gas vent Subsequently to the manufacturing procedure of this part cutting, product yield is improved.
Exhaust apparatus can be gas vent 5, be arranged in sand mold 2, tail end is connected with cell structure 4, head end It is turned on external environment.Casting with one end of exhaust apparatus and steel pipe is embedded in sand mold together in advance, extracts steel pipe out, is formed Gas vent 5 can effectively stop knockout, and the ratio of the cast(ing) surface burning into sand defect caused by knockout is greatly decreased.Gas vent 5 will Gas is discharged to the outside in environment.Exhaust apparatus or the closed air storing cavity 6 being arranged inside cell structure 4, it is right In complicated casting, the making of itself casting mold is just very troublesome, locally the place being vented is needed to have very much, if each position Gas vent 5 is all set, very big trouble will be brought to the making of casting mold, some places, can not even because casting mold structure is limited Vent is set, and air storing cavity 6 can store gas, the place being vented is needed to introduce a gas into air storing cavity on casting mold In 6, without setting gas vent 5.
Further, refractory fiber floor 3 can also be included, be embedded in sand mold 2, and positioned at casting 1 and porous structure Between body 4,3 medial surface of refractory fiber floor and the cavity surface of sand mold 2 coincide, and the refractory fiber floor 3 obstructs metal liquid, The gas that casting generates is discharged by refractory fiber floor 3.The barrier that refractory fiber floor 3 can be further improved to molten metal is left The right side, so as to further improve product yield.
Refractory material can be foundry quartz sand, and the particle of refractory material is spherical or near-spherical, and particle outer diameter is more than Equal to 0.3mm, particle outer diameter is more than or equal to the aperture foot for the irregular gas outlet channels that 0.3mm can meet between particle To meet the smoothness of gas discharge.
Binding agent can be organic binder bond or inorganic binder.Organic binder bond include cold box resin, phenolic resin, Furane resins or epoxy resin.Inorganic binder is included in waterglass, aluminium dihydrogen phosphate, Ludox, Aluminum sol, zirconium colloidal sol One or more can also be mixed by the one or more in waterglass, Ludox, Aluminum sol, zirconium colloidal sol and refractory powder It closes and is made.
Refractory powder ingredient includes the one or more in aluminium oxide, silica, zirconium oxide.
The casting of the present invention may be employed following method with exhaust apparatus and make:
A) it is 100 by ratio:The quartz sand and cold box resin of 1-2 is added in sand mixer and mixed 1-2 minutes;
B) pour the mixture into model, using triethylamine curing and demolding, cell structure 4 is made;
C) cell structure 4 and steel pipe tail end are fixed, the two is embedded in sand mold 2 when making sand mold 2, afterwards The exhaust apparatus being connected with cell structure 4 is made in sand mold 2.This method is simple to manufacture, but cold box resin when pouring It may aoxidize, the cold box resin intensity after oxidation is lower, so as to cause casting scab.
Further, the surface of cell structure 4 made of step b) is coated into waterglass, by the resistance to of layer thickness 1-3mm Fiery fibrous paper is adhered to 4 surface of cell structure, and the refractory fiber floor 3 being fixed on cell structure 4 is formed after dry.
The casting exhaust apparatus of the present invention can also use following another method to make,
A) ceramic powder, the binding agent of 1-9,70-95 refractory particle that mass fraction is 1-9 are uniformly mixed;
B) pour the mixture into model, be heated to 100-200 DEG C it is 30-60 minutes dry;
C) cell structure 4 is made after 1200-1550 DEG C of sintering is heated to after dried mixture is demoulded;
D) cell structure 4 and steel pipe tail end are fixed, the two is embedded in sand mold 2 when making sand mold 2, afterwards The exhaust apparatus being connected with cell structure 4 is made in sand mold 2.Cell structure 4 made of this method is due to shape after sintering Into, therefore manufacture is of high cost, but intensity is high, using effect is good, is not susceptible to casting scab.Ceramic powder is schmigel, oxygen Change aluminium powder, zirconia powder, zirconium silicate powder, mullite powder, clay, silicon powder, pyrophillite, wollastonite, kyanite, sillimanite, point One or more in spar, andalusite or olivine.Binding agent can be waterglass, Ludox, Aluminum sol, zirconium colloidal sol, One or more in aluminum phosphate, aluminium dihydrogen phosphate.Refractory particle can not come including corundum, mullite, fused alumina zirconia, zirconium One or more in stone, zircon sand, silica sand.
Further, the surface of cell structure 4 made of step c) is coated into waterglass or Ludox, by layer thickness 1- The refractory fiber paper of 3mm is adhered to 4 surface of cell structure, and the refractory fibre being fixed on cell structure 4 is formed after dry Layer 3.

Claims (7)

1. a kind of casting exhaust apparatus, which is characterized in that including:
Cell structure(4), it is embedded in sand mold(2)In, be made of granular refractory material, the particle of refractory material with It is bonded between grain by binding agent, the irregular gas outlet channels in aperture is formed after the particle packing of refractory material;And
Exhaust apparatus is arranged at sand mold(2)In and and cell structure(4)It is connected, exhaust apparatus will be through gas outlet channels The gas of discharge is discharged to the outside in environment or stores, and further includes refractory fiber floor(3), it is embedded in sand mold(2)In, and be located at Casting(1)With cell structure(4)Between, refractory fiber floor(3)Medial surface and sand mold(2)Cavity surface coincide, it is described resistance to Fiery fibrous layer(3)Metal liquid is obstructed, the gas for casting generation passes through refractory fiber floor(3)Discharge.
2. casting exhaust apparatus according to claim 1, it is characterised in that:The exhaust apparatus is gas vent(5), It is arranged at sand mold(2)In, tail end and cell structure(4)It is connected, head end is turned on external environment.
3. casting exhaust apparatus according to claim 1, it is characterised in that:The exhaust apparatus is to be arranged at porous knot Structure body(4)Internal closed air storing cavity(6).
4. casting exhaust apparatus according to claim 1, it is characterised in that:The refractory material is foundry quartz sand, The particle of refractory material is spherical or near-spherical, and the particle outer diameter of the refractory material is more than or equal to 0.3mm.
5. casting exhaust apparatus according to claim 1, it is characterised in that:The binding agent is organic binder bond or nothing Machine binding agent.
6. a kind of method of the casting exhaust apparatus described in manufacturing claims 1, it is characterised in that:
A) it is 100 by ratio:The quartz sand and cold box resin of 1-2 is added in sand mixer and mixed 1-2 minutes;
B) pour the mixture into model, using triethylamine curing and demolding, cell structure is made(4);
C) sand mold is being made(2)When by cell structure(4)Sand mold is embedded in steel pipe tail end(2)It is interior, afterwards in sand mold(2)In Making and cell structure(4)Connected exhaust apparatus;
Wherein, by cell structure made of step b)(4)Surface coating waterglass or Ludox, by layer thickness 1-3mm's Refractory fiber paper is adhered to cell structure(4)Surface forms after dry and is fixed on cell structure(4)On refractory fiber floor (3).
7. a kind of method of the casting exhaust apparatus described in manufacturing claims 1, it is characterised in that:
A) ceramic powder, the binding agent of 1-9,70-95 refractory particle that mass fraction is 1-9 are uniformly mixed;
B) pour the mixture into model, be heated to 100-200 DEG C it is 30-60 minutes dry;
C) cell structure is made after 1200-1550 DEG C of sintering is heated to after dried mixture is demoulded(4);
D) cell structure(4)It is fixed with steel pipe tail end, is making sand mold(2)When the two is embedded in sand mold(2)It is interior, it Afterwards in sand mold(2)Middle making and cell structure(4)Connected exhaust apparatus;
Wherein, by cell structure made of step c)(4)Surface coating waterglass or Ludox, by layer thickness 1-3mm's Refractory fiber paper is adhered to cell structure(4)Surface forms after dry and is fixed on cell structure(4)On refractory fiber floor (3).
CN201610575659.9A 2016-07-21 2016-07-21 A kind of casting exhaust apparatus and the device producing method Active CN106001418B (en)

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CN1476361A (en) * 2000-11-24 2004-02-18 花王株式会社 Sublimation pattern casting method
CN201127981Y (en) * 2007-05-16 2008-10-08 姜庆志 Mould for casting ball
CN101337261A (en) * 2008-08-08 2009-01-07 佛山市峰华自动成形装备有限公司 Non-mold forming technique capable of increasing sand-core exhaust capacity and sand-core
CN101612646A (en) * 2009-07-20 2009-12-30 叶俊 The production method of a kind of air release plates and clean foundry goods
CN201728336U (en) * 2010-05-27 2011-02-02 南通华东油压科技有限公司 Large-scale excvavtor ultra precision multi-circuit control main valve body sand mould
CN201791908U (en) * 2010-09-08 2011-04-13 丰田工业汽车配件(昆山)有限公司 Exhaust plant
CN201913186U (en) * 2010-12-08 2011-08-03 山西汤荣机械制造股份有限公司 Metal mold sand coating device for casting lower shape of brake drum
CN205927001U (en) * 2016-07-21 2017-02-08 济南圣泉倍进陶瓷过滤器有限公司 Air exhausting device for casting

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3871966B2 (en) * 2002-05-24 2007-01-24 花王株式会社 Vanishing model casting method
JP4407884B2 (en) * 2003-04-03 2010-02-03 花王株式会社 Vanishing model casting filter
JP4226375B2 (en) * 2003-04-11 2009-02-18 花王株式会社 Vanishing model casting filter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1476361A (en) * 2000-11-24 2004-02-18 花王株式会社 Sublimation pattern casting method
CN201127981Y (en) * 2007-05-16 2008-10-08 姜庆志 Mould for casting ball
CN101337261A (en) * 2008-08-08 2009-01-07 佛山市峰华自动成形装备有限公司 Non-mold forming technique capable of increasing sand-core exhaust capacity and sand-core
CN101612646A (en) * 2009-07-20 2009-12-30 叶俊 The production method of a kind of air release plates and clean foundry goods
CN201728336U (en) * 2010-05-27 2011-02-02 南通华东油压科技有限公司 Large-scale excvavtor ultra precision multi-circuit control main valve body sand mould
CN201791908U (en) * 2010-09-08 2011-04-13 丰田工业汽车配件(昆山)有限公司 Exhaust plant
CN201913186U (en) * 2010-12-08 2011-08-03 山西汤荣机械制造股份有限公司 Metal mold sand coating device for casting lower shape of brake drum
CN205927001U (en) * 2016-07-21 2017-02-08 济南圣泉倍进陶瓷过滤器有限公司 Air exhausting device for casting

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