CN103286263A - Method for casting cast broken wall and rolling mortar wall evaporated pattern - Google Patents
Method for casting cast broken wall and rolling mortar wall evaporated pattern Download PDFInfo
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- CN103286263A CN103286263A CN2013102054707A CN201310205470A CN103286263A CN 103286263 A CN103286263 A CN 103286263A CN 2013102054707 A CN2013102054707 A CN 2013102054707A CN 201310205470 A CN201310205470 A CN 201310205470A CN 103286263 A CN103286263 A CN 103286263A
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Abstract
The invention relates to a method for casting a cast broken wall and rolling mortar wall evaporated pattern. The method comprises the following steps: foaming polystyrene in a foaming machine for 5 minutes, wherein the temperature is controlled to be 90-100 DEG C, and the air pressure is controlled to be 0.6-0.8MPa, and the foam specific gravity is 17-18g/L; standing the foam in air for 8-10 hours, molding by using a foam molding machine, wherein the temperature is controlled to be 100-110 DEG C, and the air pressure is controlled to be 0.6-0.8MPa; casting the cast broken wall and rolling mortar wall evaporated pattern through one-step molding, and finally drying the evaporated pattern. By employing the one-step molding technical method, the labor force is reduced, the product quality is improved, and the cast yield is improved.
Description
Technical field
The invention belongs to the casting and molding technical field, relate to a kind of preparation method of casting broken wall and rolled mortar wall disappearance mould, adopt one-time formed technical method, be conducive to reduce the labour, improve the quality of products, improve casting yield.
Background technology
Lost foam casting is called dry sand full mold negative pressure casting again, is referred to as EPC abroad, is one of state-of-the-art casting technique in the world at present, is described as once " revolution " on the casting history, is referred to as green casting of 21 century both at home and abroad.
The lost foam casting production principle: this method is made the bubble moulding model earlier by technological requirement, be coated with and hang special high-temperature resistant coating, after the drying, place special sandbox, insert dry sand by technological requirement again, utilize the three-dimensional vibrating consolidation, vacuumize casting metals liquid under the state, this moment, the model gasification disappeared, and the molten metal replacement model copies the foundry goods the same with steeping moulding model.
The lost foam casting process flow process:
(1) makes bubble and mould gasified pattern;
(2) composite pouring system;
(3) the gasified pattern special fireproof coating of surface spary and oven dry;
(4) special interlayer sandbox is placed on the three-dimensional vibrating workbench;
(5) insert bed load (dried quartz sand) jolt ramming, strike off;
(6) gasified pattern with oven dry is put on the bed load, fills up dry sand by technological requirement, and numerical control vibration appropriate time strikes off the case mouth then;
(7) cover the case mouth with plastic sheeting, put cup, the starting vacuum system after the fastening moulding of dry sand, is poured into a mould, and gasified pattern disappears, and molten metal replaces its position;
(8) discharge vacuum, treat mould turnover after the foundry goods condensation by technology, from loose quartz sand, take out foundry goods.
It is the important step of lost foam casting that the making bubble is moulded gasified pattern (disappearance mould), and the molded method of doing that disappears now generally is molding bonded, needs a large amount of glue in the bonding process, can produce a large amount of bubbles in casting cycle, influences casting quality.Particularly cast the molding bonded disappearance mould of broken wall and rolled mortar wall, because gas forming amount is big, casting defect is many, and it is immature to cast.
At the problem that existing preparation method exists, the present invention adopts one-shot forming to make the disappearance mould of the broken wall of casting and rolled mortar wall, does not need molding bonded, does not have the glue in the molding bonded, can stabilize and increase broken wall and rolled mortar wall casting quality.
Summary of the invention
Technical scheme
A kind of preparation method of casting broken wall and rolled mortar wall disappearance mould at first foams polystyrene in foaming machine, temperature is controlled at 90-100 ℃, and air pressure is controlled at 0.6-0.8MPa, 5 minutes time, specific foam weight 17-18g/ liter; Foam was left standstill in air 8-10 hour, and with the moulding of bubble molding machine, temperature is controlled at 100-110 ℃ again, and air pressure is controlled at 0.6-0.8MPa, and the disappearance mould of the broken wall of casting and rolled mortar wall is made in one-shot forming, at last the disappearance mould is dried.
The foaming machine that the present invention uses is the intermittent foaming machine of HS-450.
The bubble molding machine that the present invention uses is Fahrenheit bubble molding machine.
The polystyrene that the present invention uses is expandable polystyrene.
Bake out temperature of the present invention is no more than 40 ℃, and drying time is 24-48 hour, the preferred 35-40 of bake out temperature ℃.
Molding time of the present invention is 8-15min, preferred 10-13 min.
Size speed of the present invention is:
| Title | Last bore mm | Following bore mm | Molding time min |
| The broken wall of SJ1400 | 1300 | 307 | 10 |
| The SJ1400 rolled mortar wall | 1409 | 814 | 11 |
| The broken wall of SJ1650 | 381.3 | 1563 | 12 |
| The SJ1650 rolled mortar wall | 899 | 1565 | 13 |
Beneficial effect of the present invention
The present invention adopts one-shot forming to make the disappearance mould of the broken wall of casting and rolled mortar wall, owing to there is not the glue in the molding bonded, can stabilize and increase broken wall and rolled mortar wall casting quality.
Description of drawings
Fig. 1 1650 broken wall photos
Fig. 2 1650 rolled mortar wall photos
The specific embodiment
Embodiment 1
The broken wall of the SJ1400 molded work that disappears
The 3kg polystyrene is placed in the foaming machine foams, temperature is controlled at 90-100 ℃, and air pressure is controlled at 0.6-0.8MPa, 5 minutes time, specific foam weight 17g/ liter; Foam was left standstill in air 8-10 hour, and with the moulding of bubble molding machine, temperature is controlled at 100-110 ℃ again, air pressure control is at 0.6-0.8MPa, and the time is 10 minutes, and the broken wall disappearance mould of casting is made in one-shot forming, with the oven dry of disappearance mould, bake out temperature is 35-40 ℃, drying time 24-30 hour at last.Bore 1300mm on the broken wall disappearance of the SJ1400 that the makes mould, following bore 307mm.
Embodiment 2
The SJ1400 rolled mortar wall molded work that disappears
The 3.5kg polystyrene is placed in the foaming machine foams, temperature is controlled at 90-100 ℃, and air pressure is controlled at 0.6-0.8MPa, 5 minutes time, specific foam weight 17g/ liter; Foam was left standstill in air 8-10 hour, again with the moulding of bubble molding machine, temperature control is at 100-110 ℃, air pressure control is at 0.6-0.8MPa, time is 11 minutes, and the disappearance mould of casting rolled mortar wall is made in one-shot forming, at last the disappearance mould is dried, bake out temperature is 35-40 ℃, drying time 30-36 hour.Bore 1409mm on the broken wall disappearance of the SJ1400 that the makes mould, following bore 814mm.
Embodiment 3
The broken wall of the SJ1650 molded work that disappears
The 4kg polystyrene is placed in the foaming machine foams, temperature is controlled at 90-100 ℃, and air pressure is controlled at 0.6-0.8MPa, 5 minutes time, specific foam weight 18g/ liter; Foam was left standstill in air 8-10 hour, and with the moulding of bubble molding machine, temperature is controlled at 100-110 ℃ again, air pressure control is at 0.6-0.8MPa, and the time is 12 minutes, and the broken wall disappearance mould of casting is made in one-shot forming, with the oven dry of disappearance mould, bake out temperature is 35-40 ℃, drying time 24-36 hour at last.Bore 381.3mm on the broken wall disappearance of the SJ1400 that the makes mould, following bore 1563mm.
Embodiment 4
The SJ1650 rolled mortar wall molded work that disappears
The 4.5kg polystyrene is placed in the foaming machine foams, temperature is controlled at 90-100 ℃, and air pressure is controlled at 0.6-0.8MPa, 5 minutes time, specific foam weight 18g/ liter; Foam was left standstill in air 8-10 hour, again with the moulding of bubble molding machine, temperature control is at 100-110 ℃, air pressure control is at 0.6-0.8MPa, time is 13 minutes, and the disappearance mould of casting rolled mortar wall is made in one-shot forming, at last the disappearance mould is dried, bake out temperature is 35-40 ℃, drying time 24-48 hour.Bore 899mm on the broken wall disappearance of the SJ1400 that the makes mould, following bore 1565mm.
Claims (8)
1. a preparation method of casting broken wall and rolled mortar wall disappearance mould at first foams polystyrene in foaming machine, and temperature is controlled at 90-100 ℃, and air pressure is controlled at 0.6-0.8MPa, 5 minutes time, specific foam weight 17-18g/ liter; Foam was left standstill in air 8-10 hour, and with the moulding of bubble molding machine, temperature is controlled at 100-110 ℃ again, and air pressure is controlled at 0.6-0.8MPa, and the disappearance mould of the broken wall of casting and rolled mortar wall is made in one-shot forming, at last the disappearance mould is dried.
2. according to the preparation method of the broken wall of the casting of claim 1 and rolled mortar wall disappearance mould, it is characterized in that described polystyrene is expandable polystyrene.
3. according to the preparation method of the broken wall of the casting of claim 1 and rolled mortar wall disappearance mould, it is characterized in that described foaming machine is the intermittent foaming machine of HS-450.
4. according to the preparation method of the broken wall of the casting of claim 1 and rolled mortar wall disappearance mould, it is characterized in that described bubble molding machine is Fahrenheit bubble molding machine.
5. according to the preparation method of the broken wall of the casting of claim 1 and rolled mortar wall disappearance mould, the bake out temperature of the mould that it is characterized in that disappearing is no more than 40 ℃, and drying time is 24-48 hour.
6. according to the preparation method of the broken wall of the casting of claim 1 and rolled mortar wall disappearance mould, the mould one-shot forming time that it is characterized in that disappearing is 8-15 minute.
7. according to the preparation method of the broken wall of the casting of claim 5 and rolled mortar wall disappearance mould, the bake out temperature of the mould that it is characterized in that disappearing is 35-40 ℃.
8. according to the preparation method of the broken wall of the casting of claim 6 and rolled mortar wall disappearance mould, it is characterized in that disappearing mould one-shot forming time 10-13 minute.
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| CN2013102054707A CN103286263A (en) | 2013-05-29 | 2013-05-29 | Method for casting cast broken wall and rolling mortar wall evaporated pattern |
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| CN2013102054707A CN103286263A (en) | 2013-05-29 | 2013-05-29 | Method for casting cast broken wall and rolling mortar wall evaporated pattern |
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2013
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| CN101698218A (en) * | 2009-11-09 | 2010-04-28 | 山西天海泵业有限公司 | Lost-foam casting method for water pump thin-wall part |
| CN102009123A (en) * | 2010-12-14 | 2011-04-13 | 青岛顺联集装箱部件制造有限公司 | Method for manufacturing automobile cross beam lost foam and using method |
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Application publication date: 20130911 |