CN104259395A - Drying method of investment casting shell and used drying system - Google Patents
Drying method of investment casting shell and used drying system Download PDFInfo
- Publication number
- CN104259395A CN104259395A CN201410505657.3A CN201410505657A CN104259395A CN 104259395 A CN104259395 A CN 104259395A CN 201410505657 A CN201410505657 A CN 201410505657A CN 104259395 A CN104259395 A CN 104259395A
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- China
- Prior art keywords
- drying
- input
- dehumidifying container
- output
- control valve
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a drying method of an investment casting shell and a used drying system, belonging to the investment casting field. The drying method is technically characterized in that a dehumidifying container is vacuumized, then dry air with controllable pressure, temperature and humidity is fed into the dehumidifying container, after the dry air dries shells in the dehumidifying container without a dead angle, the dehumidifying container is vacuumized again and wet air is exhausted; the above drying process is repeated again and again. The drying mode can reduce the investment cost and can improve the drying quality and reduce the production energy consumption; the installed gross capacity of a factory capable of producing 1000 shells per day is only 30KW, the occupied area is only 30 square meters, and the production efficiency of the shell drying process is greatly improved.
Description
Technical field
The present invention relates to a kind of drying means and drying system thereof, particularly a kind of drying means of investment casting shell and the drying system of application thereof.
Background technology
The investment casting shell of current casting industry has multiple drying means, and its conventional method is placed on by the shell being stained with slurry in a larger sealing workshop, and sealing workshop is also known as dehumidifying room, and its size has hundreds of square metre usually.Above-mentioned dehumidifying room is built with powerful constant temperature, constant humidity machine and a large amount of electric fan.This constant temperature, constant humidity machine are used for dehumidifying and constant temperature, and this electric fan is used for the air in circulating dehumidification room.By the cooperation of constant temperature, constant humidity machine and electric fan, the air moisture in dehumidifying room will slowly be removed, thus reaches the object in dry shell.But this drying means power consumption is large, and the production cycle is long, and cost is high, and the quality of shell drying is also difficult to ensure.Cause the main cause of the problems referred to above as follows:
1. equipment, facility investment is large.As produced the factory of 1000 groups of shells daily, its dehumidifying room needs 600 to 700 square metres, and constant temperature, constant humidity machine and electric fan total installation of generating capacity are no less than 120 kilowatts.
2. the explained hereafter cycle is long.Shell integrated artistic completes and is generally no less than 72 hours in the cycle in dehumidifying room.
3. energy consumption is large.Shell is when the room that dehumidifies is dry, and the constant temperature in dehumidifying room, constant humidity machine and electric fan can not quit work.
4. dry mass is unstable.The air in dehumidifying room circulates by electric fan, and have dead angle time dry, when particularly having deep hole and blind hole in shell, drying effect cannot ensure especially.
5. overall efficiency is low.Because the production cycle is long, cause efficiency and output all low, energy consumption production cost is high.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a kind of investment casting shell drying means that can improve drying efficiency.
Another object of the present invention is to provide a kind of drying means that can improve drying efficiency.
For solving the problem, the technical solution adopted in the present invention is as follows:
A drying means for investment casting shell, comprises the following steps:
Step 1, puts into dehumidifying container by needing dry shell;
Step 2, becomes negative pressure by the pressure in dehumidifying container;
Step 3, in dehumidifying container, input sets the dry air of temperature and humidity, until the pressure in dehumidifying container becomes malleation;
Step 4, allows dry air carry out drying to shell within the drying time of setting;
Step 5, repeats step 2 to 4, until shell is dried to the aridity of setting.
Preferably, step 2 is that the pressure in dehumidifying container is become negative pressure by mode by vacuumizing.
Preferably, the pressure of dehumidifying container is become negative 0.04-0.08MPA by step 2.
Preferably, the malleation described in step 3 is 0.07-0.15MPA.
Preferably, in step 4 to being the drying time of shell 2-5 minute.
Apply a drying system for above-mentioned drying means,
Comprise integrated control system, dry air system, dehumidifying container and negative pressure of vacuum system,
Described integrated control system sets the dry air of temperature and humidity to dehumidifying container for controlling dry air system input, and control negative pressure of vacuum system vacuumizes process to dehumidifying container;
The output of described dry air system is connected with the input of dehumidifying container, and this dry air system and dehumidifying container junction are provided with input control valve;
The output of described dehumidifying container is connected with negative pressure of vacuum system, and this dehumidifying container and negative pressure of vacuum system junction are provided with output control valve;
Described input control valve and output control valve control its opening and closing by integrated control system.
Preferably, described dry air system comprises air compressor, air accumulator, dried-air drier, temperature control system and pressure-control valve; The output of described air compressor is connected with the input of air accumulator, the output of air accumulator is connected with the input of dried-air drier, the output of dried-air drier is connected with the input of temperature control system, the output of temperature control system is connected with the input of pressure-control valve, and the output of pressure-control valve is connected with input control valve.
Preferably, described negative pressure of vacuum system comprises vavuum pump and vacuum tank, and the input of vavuum pump is connected with the output of vacuum tank, and the input of vacuum tank is connected with output control valve.
Compared to existing technology, beneficial effect of the present invention is:
1. equipment, facility investment is few.If the factory's total installation of generating capacity producing 1000 groups of shells daily is 30 kilowatts, floor space 30 square metres.
2. with short production cycle.The shell integrated artistic deadline is 8-10 hour, is 1/7th times of old technique.
3. energy consumption is low.The shortening of production cycle and the advance of technique, compare original old technique, energy consumption only has 10%.
4. shell uniform drying, unanimously.Because shell is the supercharging drying carried out under vacuum conditions, there is not dead angle in dry run, so the dry mass of shell is ensured fully.
5. comprehensive benefit improves.Due to short production cycle, energy consumption is low, labor output improves, quality is guaranteed, be improved so comprehensive benefit is also corresponding.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of dry air system of the present invention;
Fig. 3 is the structural representation of negative pressure of vacuum system of the present invention.
Reference numeral is as follows:
1, integrated control system; 2, dry air system; 3, dehumidifying container; 4, negative pressure of vacuum system; 5, input control valve; 6, output control valve;
21, air compressor; 22, air accumulator; 23, dried-air drier; 24, temperature control system; 25, pressure-control valve;
41, vavuum pump; 42, vacuum tank.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Investment casting shell drying means of the present invention comprises the following steps:
Step 1, puts into dehumidifying container by needing dry shell;
Step 2, becomes negative pressure by the pressure in dehumidifying container;
Step 3, in dehumidifying container, input sets the dry air of temperature and humidity, until the pressure in dehumidifying container becomes malleation;
Step 4, allows dry air carry out drying to shell within the drying time of setting;
Step 5, repeats step 2 to 4, until shell is dried to the aridity of setting.
Wherein, described step 2 is that the pressure in dehumidifying container is become negative pressure by the mode by vacuumizing, and this negative pressure value is preferably negative 0.04-0.08MPA.And the malleation described in step 3 is preferably 0.07-0.15MPA.Further, in described step 4 to being preferably 2-5 minute the drying time of shell.
When applying said method, the number of times of effect selection circulation step 2 to 4 dry as required, as when needs degree of drying is higher time, the number of times increasing circulation step 2 to 4 can be selected, in time needing dry degree lower, the number of times reducing circulation step 2 to 4 can be selected, specifically should select according to actual conditions.
As shown in Figures 1 to 3, drying system of the present invention comprises integrated control system 1, dry air system 2, dehumidifying container 3 and negative pressure of vacuum system 4; Described integrated control system 1 sets the dry air of temperature and humidity to dehumidifying container 3 for controlling dry air system 2 input, and control negative pressure of vacuum system 4 pairs of dehumidifying containers 3 vacuumize process; The output of described dry air system 2 is connected with the input of dehumidifying container 3, and this dry air system 2 is provided with input control valve 5 with dehumidifying container 3 junction; The output of described dehumidifying container 3 is connected with negative pressure of vacuum system 4, and this dehumidifying container 3 is provided with output control valve 6 with negative pressure of vacuum system 4 junction; Described input control valve 5 and output control valve 6 control its opening and closing by integrated control system 1.
Wherein, described dry air system 2 comprises air compressor 21, air accumulator 22, dried-air drier 23, temperature control system 24 and pressure-control valve 25; The output of described air compressor 21 is connected with the input of air accumulator 22, the output of air accumulator 22 is connected with the input of dried-air drier 23, the output of dried-air drier 23 is connected with the input of temperature control system 24, the output of temperature control system 24 is connected with the input of pressure-control valve 25, and the output of pressure-control valve 25 is connected with input control valve 5.
In addition, described negative pressure of vacuum system 4 comprises vavuum pump 41 and vacuum tank 42, and the input of vavuum pump 41 is connected with the output of vacuum tank 42, and the input of vacuum tank 42 is connected with output control valve 6.
When using above-mentioned drying system, be first placed on by shell in dehumidifying container 3, then open output control valve 6 and vavuum pump 41, this vavuum pump 41 will make dehumidifying container 3 become negative pressure state, and this negative pressure value is approximately 0.04-0.08MPA; After container 3 to be dehumidified becomes negative pressure, first close output control valve 6, then input control valve 5 is opened, finally open air compressor 21, dried-air drier 23 and temperature control system 24 etc., thus make dry air system 2 produce the dry air setting temperature and humidity, and this dry air is delivered to dehumidifying container 3, until the pressure in dehumidifying container 3 becomes malleation, this malleation value is about 0.07-0.15MPA; After dehumidifying container 3 becomes malleation, close input control valve 5, allow dry air carry out drying to shell within the drying time of setting, its drying time is about 2-5 minute.
In actual use, just can as long as effect dry as required repeats aforesaid operations, as when needs degree of drying is higher time, can select to increase the number of times repeating aforesaid operations, in time needing dry degree lower, can select to reduce the number of times repeating aforesaid operations, specifically should select according to actual conditions.
Above-mentioned embodiment is only the preferred embodiment of the present invention; can not limit the scope of protection of the invention with this, change and the replacement of any unsubstantiality that those skilled in the art does on basis of the present invention all belong to the present invention's scope required for protection.
Claims (8)
1. a drying means for investment casting shell, is characterized in that comprising the following steps:
Step 1, puts into dehumidifying container by needing dry shell;
Step 2, becomes negative pressure by the pressure in dehumidifying container;
Step 3, in dehumidifying container, input sets the dry air of temperature and humidity, until the pressure in dehumidifying container becomes malleation;
Step 4, allows dry air carry out drying to shell within the drying time of setting;
Step 5, repeats step 2 to 4, until shell is dried to the aridity of setting.
2. drying means according to claim 1, is characterized in that: step 2 is that the pressure in dehumidifying container is become negative pressure by the mode by vacuumizing.
3. drying means according to claim 2, is characterized in that: the pressure of dehumidifying container is become negative 0.04-0.08MPA by step 2.
4. drying means according to claim 1, is characterized in that: the malleation described in step 3 is 0.07-0.15MPA.
5. drying means according to claim 1, is characterized in that: to being the drying time of shell 2-5 minute in step 4.
6. application rights requires a drying system for drying means described in 1 to 5 any one, it is characterized in that:
Comprise integrated control system, dry air system, dehumidifying container and negative pressure of vacuum system,
Described integrated control system sets the dry air of temperature and humidity to dehumidifying container for controlling dry air system input, and control negative pressure of vacuum system vacuumizes process to dehumidifying container;
The output of described dry air system is connected with the input of dehumidifying container, and this dry air system and dehumidifying container junction are provided with input control valve;
The output of described dehumidifying container is connected with negative pressure of vacuum system, and this dehumidifying container and negative pressure of vacuum system junction are provided with output control valve;
Described input control valve and output control valve control its opening and closing by integrated control system.
7. drying system according to claim 6, is characterized in that: described dry air system comprises air compressor, air accumulator, dried-air drier, temperature control system and pressure-control valve; The output of described air compressor is connected with the input of air accumulator, the output of air accumulator is connected with the input of dried-air drier, the output of dried-air drier is connected with the input of temperature control system, the output of temperature control system is connected with the input of pressure-control valve, and the output of pressure-control valve is connected with input control valve.
8. drying system according to claim 6, is characterized in that: described negative pressure of vacuum system comprises vavuum pump and vacuum tank, and the input of vavuum pump is connected with the output of vacuum tank, and the input of vacuum tank is connected with dehumidifying container output control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410505657.3A CN104259395A (en) | 2014-09-26 | 2014-09-26 | Drying method of investment casting shell and used drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410505657.3A CN104259395A (en) | 2014-09-26 | 2014-09-26 | Drying method of investment casting shell and used drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104259395A true CN104259395A (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410505657.3A Pending CN104259395A (en) | 2014-09-26 | 2014-09-26 | Drying method of investment casting shell and used drying system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10038704A1 (en) * | 2000-08-08 | 2002-02-21 | Millitzer Hans Georg | Process for drying ceramic bodies comprises using a vacuum chamber which is evacuated to a low pressure corresponding to the boiling point of the water contained in the body |
| EP1314521A1 (en) * | 2001-11-22 | 2003-05-28 | Tecnicas de Vacio, S.L. | Method and device for drying ceramic tiles |
| CN101417325A (en) * | 2007-10-23 | 2009-04-29 | 张伟 | Microwave quick-drying method of investment casting shell |
| CN102019361A (en) * | 2009-09-15 | 2011-04-20 | 蔡欲期 | Ceramic shell rapid drying method and device as well as ceramic shell |
| CN102632201A (en) * | 2012-04-10 | 2012-08-15 | 武汉中精金属制品有限公司 | Precision investment casting water glass binder shell CO2 gas hardening technology |
| CN102974769A (en) * | 2011-09-02 | 2013-03-20 | 泰州鑫宇精密铸造有限公司 | Rapid vacuum drying machine of precision casting shell |
-
2014
- 2014-09-26 CN CN201410505657.3A patent/CN104259395A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10038704A1 (en) * | 2000-08-08 | 2002-02-21 | Millitzer Hans Georg | Process for drying ceramic bodies comprises using a vacuum chamber which is evacuated to a low pressure corresponding to the boiling point of the water contained in the body |
| EP1314521A1 (en) * | 2001-11-22 | 2003-05-28 | Tecnicas de Vacio, S.L. | Method and device for drying ceramic tiles |
| CN101417325A (en) * | 2007-10-23 | 2009-04-29 | 张伟 | Microwave quick-drying method of investment casting shell |
| CN102019361A (en) * | 2009-09-15 | 2011-04-20 | 蔡欲期 | Ceramic shell rapid drying method and device as well as ceramic shell |
| CN102974769A (en) * | 2011-09-02 | 2013-03-20 | 泰州鑫宇精密铸造有限公司 | Rapid vacuum drying machine of precision casting shell |
| CN102632201A (en) * | 2012-04-10 | 2012-08-15 | 武汉中精金属制品有限公司 | Precision investment casting water glass binder shell CO2 gas hardening technology |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150107 |