CN103949596A - Air heater - Google Patents
Air heater Download PDFInfo
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- CN103949596A CN103949596A CN201410162296.7A CN201410162296A CN103949596A CN 103949596 A CN103949596 A CN 103949596A CN 201410162296 A CN201410162296 A CN 201410162296A CN 103949596 A CN103949596 A CN 103949596A
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Abstract
The invention belongs to the field of treatment of a casting mould or a mold core, and relates to an air heater which is connected with a hot core box. The air heater comprises a compressed air source, an airflow pipe and a burner, wherein the airflow pipe comprises an air inlet section, a spiral section and an air outlet section in sequence according to the flowing sequence of the compressed air; the air inlet section is connected with the compressed air source and is provided with a pressure regulating valve; the spiral section is arranged in a heat insulation box body; a flaming nozzle of the burner is also arranged in the heat insulation box body and is opposite to the spiral section; the air outlet section is opposite to a sand injection hole of the hot core box. Compared with a traditional heating mode by an electric heat-conduction pipe, the heating mode of the air heater has the advantages that the air heater does not have the phenomenon of local overheating and is more uniform in heating; furthermore, the hot core box can be heated only by connecting the air outlet section with the sand injection hole; compared with a heat transfer plate, the air heater is simpler to install.
Description
Technical field
The invention belongs to the process field of casting mold or core.
Background technology
Traditional hot-box core making process is by means of core shooter, by mixed molding sand with certain pressure (being generally 0.3～0.5MPa), be injected in the core box of 180～260 DEG C of heating-up temperatures, rely on and there is the mould of uniform temperature and the conduction of heat of the core contact surface core manufacturing craft that moulding hardens that heats up gradually from outside to inside from the core surface in core box.Hot box is made up of parts such as core box body, loose piece, positioner, heater, exhaust apparatus, ejecting mechanisms, hot box heating has electrical heating and two kinds of modes of fuel gas heating, but in actual production, electrical heating application is comparatively general, its feature be heat evenly, heat up steadily, but heating element heater programming rate is slow, power consumption is large and installation heating element heater can affect the layout of core ejecting device and exhaust apparatus.Conventional electric heater unit has two kinds of general heating plate and Special heaters, and wherein Special heater is that electrical heating elements is directly installed in hot box body, mixes and connects wire and temperature measuring equipment, without heating plate is set in addition.
In patent CN 202263895 U, disclose a kind of hot box of casting use, improvement is that in-core arranges some internal mold heating tubes in internal mold.The shortcoming of such scheme is: the mode of 1. burying heating tube in mould underground, may cause mould hot-spot, cannot be by heat Transmit evenly in the molding sand in mould, if adopt electric boiling plate, possibly because thermal stress causes gap between electric boiling plate and core box to increase, affect heat-transfer effect and mould precision, increase difficulty also to dismounting heating tube; 2. the heating-up temperature of hot box remains essentially in more than 200 DEG C, and electrically heated mode cannot ensure so continuous high temperature, and adopts the direct heating of combustion gas cannot control accurately temperature.
Summary of the invention
The invention is intended to provide the hot air apparatus that a kind of programming rate is fast, heat transfer is even, installation difficulty is low.
Object of the present invention can reach by following measures: hot air apparatus, be connected with hot box, comprise compressed air source, gas flow tube and combustor, gas flow tube is divided into wind inlet section, spiral section and wind outlet section successively according to compressed air sequence of flow, described wind inlet section is connected with compressed air source and is provided with pressure-regulating valve, and spiral section is arranged in body of thermal insulating box, the bocca of combustor is also positioned at body of thermal insulating box and relative with described spiral section, described wind outlet section with hot box to penetrate sand mouth relative.
Technique scheme difference with the prior art is: compressed air source is connected with wind inlet section, compressed air is along wind inlet section, the order of spiral section and wind outlet section flows in gas flow tube, the pressure-regulating valve of wind inlet section can regulate compressed-air actuated flow velocity, and spiral section is relative with the bocca of combustor, the flame of combustor ejection can heat the spiral section of gas flow tube, compressed air temperature in spiral section is raise fast, the compressed air of high temperature is along wind outlet section, penetrating Sha Kou enters in hot box, because the mobility of gas is strong, high temperature compressed air can be equably by penetrating gap in core and sand grain surface sufficient heat exchange along journey, being particularly conducive to needs to remove the moisture that contains or the core of solvent based material solidifies in solidification process, hot box inner chamber is heated, the present invention compares traditional electric heat pipe heating, there will not be the phenomenon of hot-spot, heat more even, curing efficiency is higher, more be conducive to reduce casting-up because the gas contracting that moisture causes, the gas quality problems of giving up, in addition, only need to by wind outlet section with penetrate the mounting means that sand mouth is connected and can realize the heating to hot box, also simpler than the installation of heat transfer plate.
Further, described compressed air source is air pump, compressed air cylinder or air compression station, and factory can select different compressed air sources as required.
Further, the wind outlet section inwall of described gas flow tube is provided with temperature sensor, this temperature sensor is connected with central control system, this central control system is also connected with combustor and barometric damper, and the compressed-air actuated temperature that central control system can record according to temperature sensor regulates and controls, if temperature is higher than setting value, driving air flow control valve increases the flow velocity of compressed air stream, and turn down combustor, and make the compressed air temperature in gas flow tube be reduced to setting value, realize temperature adjusting accurately.
Further, stating combustor is natural gas combustion engine, more environmental protection and energy saving.
Further, gas flow tube is stainless steel tube, more durable.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of hot air apparatus embodiment 1 of the present invention.
Detailed description of the invention
Embodiment 1: as shown in Figure 1: hot air apparatus, by central control system control, comprise air pump 1, gas flow tube 2 and combustor 3, gas flow tube 2 is divided into wind inlet section 21, spiral section 22 and wind outlet section 23 successively according to compressed air sequence of flow, wind inlet section 21 is connected with air pump 1, and pressure-regulating valve 4 is installed on wind inlet section 21.The spiral section 22 of gas flow tube 2 is arranged in body of thermal insulating box, and the bocca of combustor 3 is also installed in body of thermal insulating box, and this bocca is relative with spiral section 22, after combustor 3 starts, and can the jet out flames spiral section 22 of heated air stream pipe 2 of bocca.The wind outlet section 23 of gas flow tube 2 and hot box to penetrate sand mouth relative, after penetrating sand machine and penetrating sand, high temperature compressed air passes in this hot box, on the inwall of gas flow tube 2 wind outlet sections 23, is fixed with temperature sensor 5.Temperature sensor 5, pressure-regulating valve 4 and combustor 3 are all connected with central control system.Wherein, combustor 3 adopts natural gas combustion engine 3 conventionally, and gas flow tube 2 adopts stainless steel tube.
Air pump 1 is connected with wind inlet section 21, compressed air is along wind inlet section 21, the order of spiral section 22 and wind outlet section 23 flows in gas flow tube 2, pressure-regulating valve 4 can regulate compressed-air actuated flow velocity, the flame of the ejection of combustor 3 can gas flow tube 2 spiral section 22 heat, compressed air temperature in spiral section 22 is raise fast, the compressed air of high temperature is along wind outlet section 23, penetrating Sha Kou enters in hot box, because the mobility of gas is strong, high temperature compressed air can heat hot box inner chamber equably, the present invention compares traditional electric heat pipe heating, there will not be the phenomenon of hot-spot, heat more even, in addition, only need to by wind outlet section 23 with penetrate the mounting means that sand mouth is connected and can realize the heating to hot box, also simpler than the installation of heat transfer plate.
Embodiment 2: as different from Example 1, adopt compressed air cylinder or air compression station to replace air pump.
The foregoing is only the detailed description of preferred embodiment of the present invention, be not used for limiting the present invention, the embodiment of all similar variations of doing according to creation spirit of the present invention, all should be contained among the present invention.
Claims (5)
1. hot air apparatus, be connected with hot box, it is characterized in that: comprise compressed air source, gas flow tube and combustor, gas flow tube is divided into wind inlet section, spiral section and wind outlet section successively according to compressed air sequence of flow, described wind inlet section is connected with compressed air source and is provided with pressure-regulating valve, and spiral section is arranged in body of thermal insulating box, the bocca of combustor is also positioned at body of thermal insulating box and relative with described spiral section, described wind outlet section and hot box to penetrate sand mouth relative.
2. hot air apparatus according to claim 1, is characterized in that: described compressed air source is air pump, compressed air cylinder or air compression station.
3. hot air apparatus according to claim 1 and 2, is characterized in that: the wind outlet section inwall of described gas flow tube is provided with temperature sensor, and this temperature sensor is connected with central control system, and this central control system is also connected with combustor and barometric damper.
4. hot air apparatus according to claim 3, is characterized in that: described combustor is natural gas combustion engine.
5. hot air apparatus according to claim 4, is characterized in that: described gas flow tube is stainless steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162296.7A CN103949596A (en) | 2014-04-22 | 2014-04-22 | Air heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410162296.7A CN103949596A (en) | 2014-04-22 | 2014-04-22 | Air heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103949596A true CN103949596A (en) | 2014-07-30 |
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ID=51327019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410162296.7A Pending CN103949596A (en) | 2014-04-22 | 2014-04-22 | Air heater |
Country Status (1)
| Country | Link |
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| CN (1) | CN103949596A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105817585A (en) * | 2016-05-18 | 2016-08-03 | 重庆新红旗缸盖制造有限公司 | Sand core assembling device |
| CN105855477A (en) * | 2016-04-13 | 2016-08-17 | 常州祥德机械制造有限公司 | Sand core forming machine |
| CN109691558A (en) * | 2019-03-07 | 2019-04-30 | 福建省紫葵生态农林科技股份有限公司 | Installation for fermenting is used in a kind of production of Keemun black tea |
| WO2021218222A1 (en) * | 2020-04-27 | 2021-11-04 | 苏州明志科技股份有限公司 | Super-efficient air heating system and core making machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH667821A5 (en) * | 1985-08-02 | 1988-11-15 | Werner Lueber | Appts. for hardening casting cores - having time valves controlling the flow of air and hardener gas through core box |
| CN1065418A (en) * | 1992-05-28 | 1992-10-21 | 清华大学 | Heating, vacuum replacement hardening process core manufacturing craft and equipment |
| CN2518622Y (en) * | 2001-12-20 | 2002-10-30 | 华中科技大学 | CO2 gas supply control equipment |
| CN202725970U (en) * | 2012-09-07 | 2013-02-13 | 上海宝钢铸造有限公司 | Water-cooling fire hole resin sand cavity hot-air drying structure |
| CN103307895A (en) * | 2013-06-06 | 2013-09-18 | 重庆长江造型材料（集团）股份有限公司 | Precoated sand heater structure |
| CN203862964U (en) * | 2014-04-22 | 2014-10-08 | 重庆长江造型材料（集团）股份有限公司 | Hot blast device |
-
2014
- 2014-04-22 CN CN201410162296.7A patent/CN103949596A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH667821A5 (en) * | 1985-08-02 | 1988-11-15 | Werner Lueber | Appts. for hardening casting cores - having time valves controlling the flow of air and hardener gas through core box |
| CN1065418A (en) * | 1992-05-28 | 1992-10-21 | 清华大学 | Heating, vacuum replacement hardening process core manufacturing craft and equipment |
| CN2518622Y (en) * | 2001-12-20 | 2002-10-30 | 华中科技大学 | CO2 gas supply control equipment |
| CN202725970U (en) * | 2012-09-07 | 2013-02-13 | 上海宝钢铸造有限公司 | Water-cooling fire hole resin sand cavity hot-air drying structure |
| CN103307895A (en) * | 2013-06-06 | 2013-09-18 | 重庆长江造型材料（集团）股份有限公司 | Precoated sand heater structure |
| CN203862964U (en) * | 2014-04-22 | 2014-10-08 | 重庆长江造型材料（集团）股份有限公司 | Hot blast device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855477A (en) * | 2016-04-13 | 2016-08-17 | 常州祥德机械制造有限公司 | Sand core forming machine |
| CN105817585A (en) * | 2016-05-18 | 2016-08-03 | 重庆新红旗缸盖制造有限公司 | Sand core assembling device |
| CN109691558A (en) * | 2019-03-07 | 2019-04-30 | 福建省紫葵生态农林科技股份有限公司 | Installation for fermenting is used in a kind of production of Keemun black tea |
| WO2021218222A1 (en) * | 2020-04-27 | 2021-11-04 | 苏州明志科技股份有限公司 | Super-efficient air heating system and core making machine |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140730 |