CN100494840C - Deep-cavity casting mold drying process - Google Patents
Deep-cavity casting mold drying process Download PDFInfo
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- CN100494840C CN100494840C CNB2007100547422A CN200710054742A CN100494840C CN 100494840 C CN100494840 C CN 100494840C CN B2007100547422 A CNB2007100547422 A CN B2007100547422A CN 200710054742 A CN200710054742 A CN 200710054742A CN 100494840 C CN100494840 C CN 100494840C
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- return air
- mold
- ajutage
- cover
- internal mold
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Abstract
The invention discloses a deep cavity mold drying process, which includes the following processing steps: step 1: vertical outside mode, placed the cylinder inside model within in the outside module, kept a gap between the bottom of the internal model and the bottom of outside model; step 2: the wind tube installs on the top of the inside model, and the down hole of the wind tube pressurized with the top of the inside model; the wind return cover installs out of the wind tube, the down hole of the wind return cover pressurized with the top of the outside model; step 3: on the top of the wind tube and the wind return cover placed the cycle heat air dryer whose wind inlet connects to the up hole of the wind tube, the wind return outlet connects to the top hole of the wind return cover; step 4: open the hot air cycle dryer, along the hot air channel formed in the first step the hot air rapid moves and rapid transfer the heat of the wall to heat the inside and outside mode at the same time. The drying process has small energy consumption and low cost because of the inside and outside casting is completed in one time.
Description
Technical field
The present invention relates to be used for the stoving process of the casting mold of foundry goods, especially relate to a kind of stoving process of large-sized deep-cavity casting mold.
Background technology
Large-sized deep-cavity casting mold [reaching the casting mold of the cylinder block casting of φ 3 * 12 (m) as size] comprises external mold and internal mold, be that external mold and internal mold are dried separately at present to the oven dry of its inside and outside mould and the skin drying process using behind the applying coatings, be about to external mold and internal mold and advance drying oven separately, or external mold adopts the circulating air drying machine drying, the fire drying of internal mold employing alcohol-base paint point.There is following problem in this drying mode to deep-cavity casting mold: 1, need build huge drying oven at the casting mold of oven dry, floor space is big, and investment is big, and the scope of application (especially height) is limited; 2, external mold advances the drying oven oven dry, and a large amount of heats are used for the heating of non-working surfaces such as shell, and the thermal efficiency is low; 3, internal mold adopts the fire drying of alcohol-base paint point, is only applicable to resin bonded sand mould, and the scope of application is limited; 4, the two is dried separately needs the energy consumption height, and transporting and hoisting operation in workshop is many, oven dry cost height.
Summary of the invention
The object of the present invention is to provide a kind of stoving process of drying the one step completed deep-cavity casting mold of low, the inside and outside casting mold of cost.
For achieving the above object, the present invention can take following technical proposals:
The stoving process of deep-cavity casting mold of the present invention is characterized in that: it comprises following procedure of processing:
The first step: external mold is vertically placed, and the tubular internal mold is placed in the external mold, makes internal mold bottom and external mold bottom maintain the gap, forms hot-air channel from gap to the annular gap between inside and outside mould sidewall of interior mold cavity through between internal mold bottom and external mold bottom;
Second step: be provided with ajutage above described internal mold, the end opening of this ajutage seals mutually with the upper surface of described internal mold; Outer cover at described ajutage is equipped with the return air cover, and the end opening of this return air cover seals mutually with the upper surface of described external mold; Form annular return air inlet between the upper portion side wall of the upper portion side wall of described ajutage and return air cover;
The 3rd step: be placed with the circulating air dryer that has control valve above described ajutage and return air cover, the air-supply mouth of this circulating air dryer is connected with the suitable for reading of ajutage, and its return air inlet is connected with the suitable for reading of return air cover;
The 4th step: ON cycle air flow dryer, hot blast after the circulating air dryer will heat is through the air-supply mouth is blown in the inner chamber of described internal mold by ajutage after, the hot-air channel that forms along the first step flows rapidly, the quick heat exchange of outer wall with the inwall and the internal mold of external mold, in inciting somebody to action, external mold heats simultaneously, the annular return air inlet that forms between the upper portion side wall of hot blast after the cooling via the upper portion side wall of ajutage and return air cover returns in the return air inlet of circulating air dryer, after heating, enter again in the inner chamber of internal mold, reciprocation cycle, until interior external mold is heated to meet the requirements till;
The 5th step: remove circulating air dryer and return air cover, ajutage, directly internal mold is arrived the external mold bottom down, get final product ready placement cast gate, wait for pouring molten iron.
For handling safety, minimizing heat radiation, be lined with heat-insulation layer on the madial wall of return air cover.
Leave the gap between the air-supply mouth of circulating air dryer and ajutage suitable for reading, utilize injection principle, hot blast neither escapes, and is convenient to place dryer again; Leaving the gap between the return air inlet of circulating air dryer and return air cover suitable for reading, is in order by discharge section return air steam to be taken away in the hot air circulation process.
The invention has the advantages that and adopt this kind stoving process, interior external mold need only be placed in the mold pit and just can carry out heating, drying that do not need to build specially drying oven, floor space reduces, cost of investment reduces; In whole drying course, the handling repeatedly of inside and outside mould need not be reduced operation links such as lifting, improve operating efficiency; Owing to adopted the circulating air first drying, make inside and outside mould working face oven dry evenly, energy consumption is little and the thermal efficiency is high.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
As shown in the figure, the stoving process of deep-cavity casting mold of the present invention comprises following procedure of processing:
The first step: because the deep-cavity casting mold height is very big, size can reach φ 3 * 12 (m), at first external mold 1 vertically should be placed, and tubular internal mold 2 is placed in the external mold 1, makes internal mold 2 bottoms and external mold 1 bottom maintain the gap; Form hot-air channel through the gap between internal mold 2 bottoms and external mold 1 bottom to the annular gap between inside and outside mould 2,1 sidewall from internal mold 2 inner chambers;
Second step: be provided with ajutage 3 above described internal mold 2, the end opening of this ajutage 3 seals mutually with the upper surface of described internal mold 2; Outer cover at described ajutage 3 is equipped with return air cover 4, and the end opening of this return air cover 4 seals mutually with the upper surface of described external mold 1; Form annular return air inlet between the upper portion side wall of described ajutage 3 and return air cover 4; For handling safety, minimizing heat radiation, on the madial wall of return air cover 4, be lined with heat-insulation layer 6;
The 3rd step: be placed with the circulating air dryer 5 that has control valve above described ajutage 3 and return air cover 4, the air-supply mouth of this circulating air dryer 5 is connected with the suitable for reading of ajutage 3, and its return air inlet is connected with the suitable for reading of return air cover 4; For ease of placing circulating air dryer 5, between the air-supply mouth of circulating air dryer 5 and ajutage 3 suitable for reading, leave the gap, owing to utilized injection principle, hot blast can not escape; In order in the hot air circulation process, steam to be taken away, between the return air inlet of circulating air dryer 5 and return air cover 4 suitable for reading, leave the gap by discharge section return air;
The 4th step: ON cycle air flow dryer 5, hot blast after circulating air dryer 5 will heat is through the air-supply mouth is blown in the inner chamber of described internal mold 2 by ajutage 3 after, the hot-air channel that forms along the first step flows rapidly, the quick heat exchange of outer wall with the inwall and the internal mold 2 of external mold 1, in inciting somebody to action, external mold 2,1 heating simultaneously, the annular return air inlet that forms between the upper portion side wall of hot blast after the cooling via ajutage 3 and return air cover 4 returns in the return air inlet of circulating air dryer 5, after heating, enter again in the inner chamber of internal mold 2, reciprocation cycle, until interior external mold is heated to meet the requirements till;
The 5th step: remove circulating air dryer 5 and return air cover 4, ajutage 3, directly internal mold is arrived external mold 1 bottom 2 times, get final product ready placement cast gate, wait for pouring molten iron.
Claims (3)
1, a kind of stoving process of deep-cavity casting mold is characterized in that: it comprises following procedure of processing:
The first step: external mold (1) is vertically placed, and tubular internal mold (2) is placed in the external mold (1), makes internal mold (2) bottom and external mold (1) bottom maintain the gap; Form hot-air channel from gap to the annular gap between inside and outside mould (2,1) sidewall of internal mold (2) inner chamber through between internal mold (2) bottom and external mold (1) bottom;
Second step: be provided with ajutage (3) in the top of described internal mold (2), the end opening of this ajutage (3) seals mutually with the upper surface of described internal mold (2); Outer cover at described ajutage (3) is equipped with return air cover (4), and the end opening of this return air cover (4) seals mutually with the upper surface of described external mold (1); Form annular return air inlet between the upper portion side wall of the upper portion side wall of described ajutage (3) and return air cover (4);
The 3rd step: be placed with the circulating air dryer (5) that has control valve in the top of described ajutage (3) and return air cover (4), suitable for reading being connected of the air-supply mouth of this circulating air dryer (5) and ajutage (3), suitable for reading being connected of its return air inlet and return air cover (4);
The 4th step: ON cycle air flow dryer (5), hot blast after circulating air dryer (5) will heat is through the air-supply mouth is blown in the inner chamber of described internal mold (2) by ajutage (3) after, the hot-air channel that forms along the first step flows rapidly, the quick heat exchange of outer wall with the inwall and the internal mold (2) of external mold (1), in inciting somebody to action, external mold (2,1) heating simultaneously, the annular return air inlet that forms between the upper portion side wall of hot blast after the cooling via the upper portion side wall of ajutage (3) and return air cover (4) returns in the return air inlet of circulating air dryer (5), after heating, enter again in the inner chamber of internal mold (2), reciprocation cycle, until interior external mold is heated to meet the requirements till;
The 5th step: remove circulating air dryer (5) and return air cover (4), ajutage (3), directly internal mold (2) is arrived external mold (1) bottom down, get final product ready placement cast gate, wait for pouring molten iron.
2, the stoving process of deep-cavity casting mold according to claim 1 is characterized in that: lining heat-insulation layer (6) on the madial wall of the return air cover (4) described in second step.
3, the stoving process of deep-cavity casting mold according to claim 1 and 2 is characterized in that: in the 3rd step between the air-supply mouth of circulating air dryer (5) and ajutage (3) suitable for reading, the return air inlet of circulating air dryer (5) and return air cover (4) suitable for reading between leave the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100547422A CN100494840C (en) | 2007-07-10 | 2007-07-10 | Deep-cavity casting mold drying process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100547422A CN100494840C (en) | 2007-07-10 | 2007-07-10 | Deep-cavity casting mold drying process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101101166A CN101101166A (en) | 2008-01-09 |
| CN100494840C true CN100494840C (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100547422A Expired - Fee Related CN100494840C (en) | 2007-07-10 | 2007-07-10 | Deep-cavity casting mold drying process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100494840C (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850224A (en) * | 1973-07-30 | 1974-11-26 | Sherwood Refractories | Process and apparatus for drying shell molds |
-
2007
- 2007-07-10 CN CNB2007100547422A patent/CN100494840C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850224A (en) * | 1973-07-30 | 1974-11-26 | Sherwood Refractories | Process and apparatus for drying shell molds |
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| Publication number | Publication date |
|---|---|
| CN101101166A (en) | 2008-01-09 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Danjiangkou Hongyuan Silicon Carbide Co.,Ltd. Assignor: No. 6 Institute of Project Planning & Research of Machinery Industry Contract record no.: 2010420000061 Denomination of invention: Deep-cavity casting mold drying process Granted publication date: 20090603 License type: Exclusive License Open date: 20080109 Record date: 20100520 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20100710 |