CN201257495Y - Iron type sand coated casting exhaust system - Google Patents
Iron type sand coated casting exhaust system Download PDFInfo
- Publication number
- CN201257495Y CN201257495Y CNU2008201644218U CN200820164421U CN201257495Y CN 201257495 Y CN201257495 Y CN 201257495Y CN U2008201644218 U CNU2008201644218 U CN U2008201644218U CN 200820164421 U CN200820164421 U CN 200820164421U CN 201257495 Y CN201257495 Y CN 201257495Y
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- swage
- steam vent
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Abstract
The utility model relates to an exhaust system for casting iron moulds with sand liners. The exhaust system is provided with an upper iron mould, a lower iron mould and a mould, wherein the iron moulds are provided with sand shot holes; sand liners are arranged among the iron moulds and the mould; exhaust holes are arranged in the sand shot holes; and exhaust ducts are arranged on the mouldjoints of the mould and the iron mould. The exhaust system for casting iron moulds with sand liners is characterized in that the central position of the sand shot holes of the upper iron mould or the upper iron mould and the lower iron mould are provided with exhaust holes which are not communicated with a mould cavity of a cast product along the direction from the backs of the iron moulds to the mould cavity, and the diameters of the exhaust holes are 4-10 mm; and the distance between the bottoms of the exhaust holes and the mould cavity of the cast product is 6-10 mm. For the exhaust system, air in the mould cavity can be exhausted outside the mould cavity smoothly in the processes of casting, moulding and pouring molten iron of iron moulds with sand liners and the following cooling and solidification of the molten iron in the mould, thereby the defect that air holes or shrinkage blowholes generated due to exhaust problem is avoided.
Description
Technical field
The utility model relates to a kind of foundry engieering, especially relates to a kind of Iron Mould Coated Sand foundry engieering.
Background technology
The Iron Mould Coated Sand foundry engieering is the method that adopts the casting mold be covered with one deck molding sand in metal mold (desire claims swage) die cavity to produce foundry goods.This casting mold has favorable rigidity, and cooling velocity is fast, in the casting cycle of foundry goods (especially spheroid foundry goods), can make full use of that the graphitization expansion of magnesium iron produces from feeding capacity, can realize head-free casting.China is from nineteen seventies this Casting Technology that begins one's study, and just this technology is applied to automobile engine, diesel engine, air compressor crank, multiple foundry goods such as camshaft, valve body, connecting rod, cylinder sleeve, abrading-ball, hub reduction gear housing, brake hubs.The three big technology essential factors that economy and technical advantage relied on that the Iron Mould Coated Sand foundry engieering has: cooling velocity, solidify feeding, exhaust technique.The first two big technology essential factor (cooling velocity, solidify feeding) is in research and apply in the process, solves gradually fairly perfectly.Have the exhaust technique of foundry goods in casting cycle only does not solve always well.For the design of various foundry goods Iron Mould Coated Sand casting exhaust technique, prior art is to offer air discharge duct at template and swage die joint, and last model is provided with the exhaust needle method, and the exhaust needle center is with sand-spraying hole center on the swage.Cover sand molding and finish, the steam vent of exhaust needle same diameter together and height is left at casting mold sand-spraying hole center, and the steam vent bottom is with the casting mold medium casting die cavity (see figure 1) that interlinks.This exhaust technique design, only effective for gas exhaust in the molten iron casting mold die cavity of casting starting stage, finish and work as the molten iron cast, molten iron is full of the casting mold die cavity, exhaust needle (hole) position is full of by molten iron equally, because the very little relatively about ф 3-5 millimeter of exhaust needle (hole) diameter, will very fast cooled and solidified become solid, and foundry goods is much bigger owing to volume ratio exhaust needle (hole) in the casting mold die cavity, this moment, foundry goods position iron liquid also was in liquid state or semisolid cooled and solidified process, at bubbing at leisure; The overlay film tree refers to layer of sand under the high temperature liquid iron effect in the casting mold die cavity simultaneously, does solid resin sand coking and produces gas.At this moment, since exhaust needle (hole) position fully by solid iron fill according to, gas can not drain into the die cavity outside in the casting mold die cavity from exhaust needle (hole), has only the part type intracavity gas to discharge outside die cavity by metal mold (swage) die joint air discharge duct, i.e. difficulty takes place in depth position exhaust.This just causes, and gas exhaust outside die cavity has some setbacks in the die cavity, and the possibility of result produces pore or sbrinkage blowhole casting flaw.
Summary of the invention
The utility model mainly is to solve the deficiencies in the prior art, thereby researchs and develops a kind of new Iron Mould Coated Sand casting gas extraction system, to reduce the technical problem that does not freely produce bleb or sbrinkage blowhole defective etc. because of exhaust significantly.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of Iron Mould Coated Sand casting gas extraction system, have upper and lower swage and model, on swage, be provided with sand-spraying hole, between swage and the model layer of sand of covering is arranged, in sand-spraying hole, be provided with steam vent, die joint at model and swage is provided with air discharge duct, it is characterized in that the sand-spraying hole center offers and the disconnected steam vent of foundry goods die cavity toward the die cavity direction from swage back.
As a kind of scheme that steam vent is arranged, described steam vent is arranged in the sand-spraying hole of swage; Promptly go up in the sand-spraying hole of swage.
As the another kind of scheme that steam vent is arranged, described steam vent is arranged in the sand-spraying hole of upper and lower swage; Be in the sand-spraying hole of upper and lower swage.Above-listed two kinds of steam vent arrangements are looked the product structure difference and the difference setting.
As preferably, the steam vent bottom position is spaced apart the 6-10 millimeter apart from the foundry goods die cavity.Be apart from the 6-10 millimeter between steam vent bottom and die cavity
As further preferred, the steam vent bottom position is spaced apart the 8-10 millimeter apart from the foundry goods die cavity.Be apart from the 8-10 millimeter between steam vent bottom and die cavity
Distance is provided with mainly looks foundry goods size weight and adjusts size, and the single-piece foundry goods is less than 50 kilograms, and diameter only needs the 6-8 millimeter at 80 millimeters with interior spacing distance; The single-piece foundry goods is greater than 50 kilograms, and diameter needs 10 millimeters at interval greater than 80 mm distance
As preferably, the steam vent diameter is the 4-10 millimeter.Diameter is mainly put to death in the foundry goods size.
As further preferred, the steam vent diameter is the 5-6 millimeter.
The utility model is when keeping metal mold (swage) die joint air discharge duct, make casting mold in whole molten iron casting and cooled and solidified process subsequently, film covered resin sand gas that coking produces in the casting mold die cavity, institute's bubbing in the molten iron cooled and solidified process, except that partly from die joint is discharged, main gas especially in the die cavity of depth position gas can both from last swage (or upper and lower swage) steam vent, discharge very swimmingly from start to finish, thereby produce pore or sbrinkage blowhole casting flaw is scrapped foundry goods because of exhaust has some setbacks in avoiding producing.
When the design gas extraction system, except that considering to penetrate the sand exhaust, main is to solve the cast exhausting problem, otherwise the molten iron cooled and solidified bubbing in the die cavity and the gas forming amount of film covered resin sand can form pore or sbrinkage blowhole defective in foundry goods.Key Design programme element as present technique: be in reserving model template and metal mold (swage) parting Surface Design air discharge duct scheme, to be covered with the metal mold (swage) of precoated sand or when covering sand molding, offer steam vent in swage sand-spraying hole center from swage back (being meant the swage outer wall) toward die cavity (being meant the swage inwall) direction, the sand-spraying hole center of the corresponding metal mold in steam vent center (swage), steam vent does not interlink with the foundry goods die cavity, and the steam vent bottom position keeps at a certain distance away apart from the foundry goods die cavity.
The more traditional gas extraction system great advantage of gas extraction system with the technical program design is: Iron Mould Coated Sand casting casting-up molten iron and molten iron cooled and solidified process in the casting mold subsequently, not only near the die joint position, gas can be discharged outside the casting mold die cavity swimmingly in the die cavity, the more important thing is that gas can both be discharged outside the casting mold die cavity from start to finish swimmingly in the casting mold die cavity of depth position in said process, can avoid fully because exhausting problem generation and bleb or sbrinkage blowhole defective.
Description of drawings
Accompanying drawing 1 is the prior art constructions schematic diagram;
Accompanying drawing 2 is a kind of structural representations of the present utility model.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
As shown in Figure 2,1 is last swage, and 2 are following swage, and 4 for covering layer of sand, and 5 is sand-spraying hole, and 6 is exhaust needle (hole), and 7 is box fastener, 8 be about model (foundry goods).
Embodiment 1
The air compressor machine spherulitic iron crankshaft, 95 kilograms of single-piece automatic modeling crankshaft casting weight, main shaft diameter is 120 millimeters of ф, 120 millimeters of crank throw footpath ф, adopt the Iron Mould Coated Sand casting technique to produce foundry goods, two foundry goods designs of metal mold (swage) type, swage mould assembling height is 300 millimeters up and down, 600 millimeters of swage width, 1000 millimeters of length, about altogether 205 kilograms of one type casting molten iron, when manufacturer adopts the exhauster system design of existing technology, bleb, the sbrinkage blowhole defective is scrapped about 30%, and it is 8 millimeters of ф that technical solutions of the utility model steam vent diameter is adopted in the back, the steam vent bottom position is apart from 10 millimeters of die cavities, in the employing, steam vent is offered in following swage sand-spraying hole center.Bleb or sbrinkage blowhole casting flaw have been avoided fully.
The three-cylinder diesel spherulitic iron crankshaft, the single-piece automatic modeling crankshaft casting weighs 28 kilograms, crankshaft crank has mud core hole, adopt the Iron Mould Coated Sand casting technique to produce, two foundry goods designs of metal mold (swage) type, about altogether 65 kilograms of type casting molten iron, steam vent is offered in swage sand-spraying hole center in the employing, the steam vent diameter is 5 millimeters of ф, and the steam vent bottom position is apart from 8 millimeters of die cavities, and steam vent is offered in swage sand-spraying hole center in the employing.Produce medium casting and bleb or sbrinkage blowhole casting defect do not occur.
Claims (7)
1, a kind of Iron Mould Coated Sand casting gas extraction system, have upper and lower swage (1,2) and model (8), on swage, be provided with sand-spraying hole, the layer of sand of covering (4) is arranged between swage and the model, in sand-spraying hole, be provided with steam vent, die joint at model and swage is provided with air discharge duct, it is characterized in that sand-spraying hole (5) center offers and the disconnected steam vent of foundry goods die cavity (6) toward the die cavity direction from swage back.
2, Iron Mould Coated Sand casting gas extraction system according to claim 1 is characterized in that described steam vent (6) is arranged in the sand-spraying hole (5) of swage.
3, Iron Mould Coated Sand casting gas extraction system according to claim 1 is characterized in that described steam vent is arranged in the sand-spraying hole of upper and lower swage (5).
4, according to claim 1 or 2 or 3 described Iron Mould Coated Sand casting gas extraction system, it is characterized in that steam vent (6) bottom position is spaced apart the 6-10 millimeter apart from the foundry goods die cavity.
5, according to claim 1 or 2 or 3 described Iron Mould Coated Sand casting gas extraction system, it is characterized in that steam vent (6) bottom position is spaced apart the 8-10 millimeter apart from the foundry goods die cavity.
6, according to claim 1 or 2 or 3 described Iron Mould Coated Sand casting gas extraction system, it is characterized in that steam vent (6) diameter is the 4-10 millimeter.
7, according to claim 1 or 2 or 3 described Iron Mould Coated Sand casting gas extraction system, it is characterized in that steam vent (6) diameter is for being the 5-6 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201644218U CN201257495Y (en) | 2008-09-08 | 2008-09-08 | Iron type sand coated casting exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201644218U CN201257495Y (en) | 2008-09-08 | 2008-09-08 | Iron type sand coated casting exhaust system |
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| Publication Number | Publication Date |
|---|---|
| CN201257495Y true CN201257495Y (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201644218U Expired - Lifetime CN201257495Y (en) | 2008-09-08 | 2008-09-08 | Iron type sand coated casting exhaust system |
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| CN (1) | CN201257495Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380586A (en) * | 2011-10-18 | 2012-03-21 | 浙江省机电设计研究院有限公司 | Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining |
| CN102728790A (en) * | 2012-07-24 | 2012-10-17 | 江苏松林汽车零部件有限公司 | Sand-line iron mould casting process for grey cast iron flywheel housing of diesel engine |
| CN103286267A (en) * | 2013-05-28 | 2013-09-11 | 安庆市江城冶金机械有限公司 | Mold on continuous-casting production line |
| CN106001425A (en) * | 2016-06-20 | 2016-10-12 | 南京力源轨道交通装备有限公司 | Track mold with adjustable pipe diameter |
| CN106270402A (en) * | 2016-06-20 | 2017-01-04 | 南平市建阳区汽车锻压件厂 | If the automobile front axle of commutation head waters mold and automobile front axle manufacture method |
| CN106270383A (en) * | 2016-06-20 | 2017-01-04 | 南平市建阳区汽车锻压件厂 | Automobile front axle casting die and automobile front axle manufacture method |
| CN106270378A (en) * | 2016-06-20 | 2017-01-04 | 南平市建阳区汽车锻压件厂 | If the automobile front axle of binding post waters mold and automobile front axle manufacture method |
| CN106903274A (en) * | 2017-02-23 | 2017-06-30 | 西峡县众德汽车部件有限公司 | A kind of foundry cast iron mould covers sand honeycomb fashion exhaust sandbox |
| CN108971430A (en) * | 2018-08-17 | 2018-12-11 | 襄汾县福康铸造有限责任公司 | A kind of crankshaft iron die sand casting process and its swage device |
-
2008
- 2008-09-08 CN CNU2008201644218U patent/CN201257495Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380586A (en) * | 2011-10-18 | 2012-03-21 | 浙江省机电设计研究院有限公司 | Device and production method for manufacturing automobile rear axle cast through metal mold with sand lining |
| CN102728790A (en) * | 2012-07-24 | 2012-10-17 | 江苏松林汽车零部件有限公司 | Sand-line iron mould casting process for grey cast iron flywheel housing of diesel engine |
| CN103286267A (en) * | 2013-05-28 | 2013-09-11 | 安庆市江城冶金机械有限公司 | Mold on continuous-casting production line |
| CN106001425A (en) * | 2016-06-20 | 2016-10-12 | 南京力源轨道交通装备有限公司 | Track mold with adjustable pipe diameter |
| CN106270402A (en) * | 2016-06-20 | 2017-01-04 | 南平市建阳区汽车锻压件厂 | If the automobile front axle of commutation head waters mold and automobile front axle manufacture method |
| CN106270383A (en) * | 2016-06-20 | 2017-01-04 | 南平市建阳区汽车锻压件厂 | Automobile front axle casting die and automobile front axle manufacture method |
| CN106270378A (en) * | 2016-06-20 | 2017-01-04 | 南平市建阳区汽车锻压件厂 | If the automobile front axle of binding post waters mold and automobile front axle manufacture method |
| CN106270378B (en) * | 2016-06-20 | 2018-01-16 | 南平市建阳区汽车锻压件厂 | If the automobile front axle of binding post pours mold and automobile front axle preparation method |
| CN106270402B (en) * | 2016-06-20 | 2018-01-19 | 南平市建阳区汽车锻压件厂 | If the automobile front axle of commutation head pours mold and automobile front axle preparation method |
| CN106903274A (en) * | 2017-02-23 | 2017-06-30 | 西峡县众德汽车部件有限公司 | A kind of foundry cast iron mould covers sand honeycomb fashion exhaust sandbox |
| CN108971430A (en) * | 2018-08-17 | 2018-12-11 | 襄汾县福康铸造有限责任公司 | A kind of crankshaft iron die sand casting process and its swage device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090617 |
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| CX01 | Expiry of patent term |