CN102756448B - Rotational molding machine thermojet heating system - Google Patents
Rotational molding machine thermojet heating system Download PDFInfo
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- CN102756448B CN102756448B CN201210257481.5A CN201210257481A CN102756448B CN 102756448 B CN102756448 B CN 102756448B CN 201210257481 A CN201210257481 A CN 201210257481A CN 102756448 B CN102756448 B CN 102756448B
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- Prior art keywords
- gas
- thermojet
- shower nozzle
- combustion
- air
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 20
- 238000001175 rotational moulding Methods 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 25
- 239000002737 fuel gas Substances 0.000 claims abstract description 21
- 239000000567 combustion gas Substances 0.000 claims abstract description 17
- 238000010892 electric spark Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 239000003034 coal gas Substances 0.000 claims description 2
- 230000005251 gamma ray Effects 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical group OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Central Heating Systems (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to rotomoulding apparatus heating system. On the mould disks rotating, be placed with the mould of preprocessing in the forming room of body of heater, multiple thermojet shower nozzles are installed in surrounding's radial inflow of forming room, and thermojet shower nozzle is uncovered columnar structured in one end, the worn-out mouthful of port of export that end is its gas, on its other end, with porous, be fuel gas inlet end; After fuel gas, combustion air and circulating air are passed into and are mixed in thermojet shower nozzle by entrance separately on thermojet shower nozzle, under gas pressure, flow to exit, lighted by electric spark, the gas of burning generates flame in stove, makes in whole forming room without low temperature corner. Structure of the present invention is simpler, with low cost, and the thermal efficiency is high, and process time is short. Be specially adapted to complicated die and have dark recessed rotomoulded articles moulding, can make product wall thickness even, in stove, secondary cycle hot blast can make unburned combustion gas fully burning again from ejection in thermojet shower nozzle, saves the energy.
Description
Technical field
The invention belongs to rotomoulding apparatus technical field, especially relate to rotomoulding apparatus heating system.
Background technology
Rotational moulding mode of heating, as Figure 1A, 1B, is to adopt indirect mode: a very worthy burning at presentMachine will be sent into hot blast in stove by cycling hot blower fan after air heat outside heating furnace again. This design is based on flameThe mould that can not directly burn caused product quality in heat affecting mould. This mode of heating heat energy utilization is low, heat conductionBe absorbed with also just flow through a part of heat of die surface of thermal convection current, most heat follows at continuous hot blastIn ring, scatter and disappear, wasted the energy and molding time. Along with rotational moulding product is in the generally application of every field, have a lotThe product of spill or complicated shape adopts traditional approach to be difficult to moulding. The solution of traditional approach is to pacify at recessDress air-flow amplifier, guides heat into concave bottom, and air-flow amplifier is a complex mechanism, draws high pressure by device externalGas enters, and increases equipment cost, and breather line do not stop rotation and heating status, normal there is gas leakage and disconnect,Can not repair.
Summary of the invention
The object of the invention is to improve traditional heating mode, shorten the production cycle, save the energy, reduction equipment becomesThis, solving complicated rotational moulding product can not moulding and the quality problems such as gage distortion.
The object of the present invention is achieved like this, on the mould disks rotating, is placed with preprocessing in the forming room of body of heaterMould, multiple thermojet shower nozzles are installed in surrounding's radial inflow of forming room, the port of export of its gas is in forming room;Fuel gas, combustion air and circulating air pass in thermojet shower nozzle by entrance separately on thermojet shower nozzle. CombustionGas is by control valve control flow, and combustion air and circulating air are respectively by proportion adjustable valve control flow separately. Combustion gas,Combustion air enters after the interior mixing of thermojet shower nozzle, and mist flows to exit under gas pressure, flow processMiddlely more fully mix through circulating air effect, when flowing to ignition electrode place, lighted by electric spark, the gas of burning producesRaw larger pressure generates flame in stove, makes in whole forming room without low temperature corner. The hot gas of discharging from forming roomAfter air exhauster is sent into hot air circulation pipeline, then pass in thermojet shower nozzle.
Structure of the present invention is simpler, with low cost, and the thermal efficiency is high, and process time is short. The present invention is specially adapted to multipleParasitic mode tool and have dark recessed rotomoulded articles moulding, can make product wall thickness even, and in stove, secondary cycle hot blast is from thermojetIn shower nozzle, ejection can make unburned combustion gas fully burning again, saves the energy.
Brief description of the drawings
Figure 1A is traditional combustion machine structural representation; Figure 1B is traditional combustion machine heated air stream route map;
Fig. 2 is rotational molding machine thermojet heater structural representation of the present invention;
Fig. 3 A is rotational molding machine thermojet shower nozzle profile schematic diagram; Fig. 3 B is rotational molding machine thermojet shower nozzle jet sideTo view; Fig. 3 C is rotational molding machine thermojet shower nozzle schematic perspective view;
Fig. 4 is thermojet heat run temperature difference die drawing;
Fig. 5 is that the direct heating mould high temperature side of thermojet is attempted;
Fig. 6 is jet system figure.
In figure: 1. fuel gas inlet, 2. igniter joint, 3. combustion air entrance, 4. circulating air entrance, 5. fixationOrchid, 6. thermal probe, 7. ignition electrode, 8. thermojet shower nozzle, 9. forming room, 10. macro-axis, 11. little axles, 12. frames,13. combustion air pipelines, 14. air exhausters, 15. circulating air pipelines, 16. moulds, 17. mould disks, 18. control valves,19. ball valves, 20. gas control valves.
Detailed description of the invention
As shown in Figure 2, on the mould disks 17 of forming room's 9 interior rotations of body of heater, be placed with the mould 16 of preprocessing.Mould disks 17 is that the rotation of macro-axis 10 by being arranged on driven by motor on stove outer frame 12, little axle 11 is driven and revolvesTurn, this frame for movement composition and working principle is the same with existing rotational moulding heating furnace, and this literary composition no longer describes in detail.4-30 thermojet shower nozzle 8 installed in surrounding's radial inflow of forming room 9. Referring to Fig. 3 A-Fig. 3 C, thermojet shower nozzle8 is uncovered columnar structured in one end, the port of export that opening end is its gas, and the port of export of gas is towards forming roomIn 9. On its other end, with porous, be fuel gas inlet end, fuel gas inlet end center is fuel gas inlet 1, combustion gasIn entrance 1, be provided with igniter joint 2, other thermal probe 6 and the ignition electrode 7 of being provided with of igniter joint 2. Fuel gas inletEnd is other is provided with combustion air entrance 3, between combustion air entrance 3 and the port of export of gas, is provided with circulating air entrance 4.When work, fuel gas, combustion air and circulating air by thermojet shower nozzle 8 separately entrance---combustion gas entersMouth 1, combustion air entrance 3 and circulating air entrance 4 pass in thermojet shower nozzle 8. On thermojet shower nozzle 8, haveOne mounting flange 5, for thermojet shower nozzle 8 is fixed on to body of heater, the gas that thermojet shower nozzle 8 is exported entersEnter in forming room 9.
Referring to Fig. 2 and Fig. 6, the fuel gas inlet 1 of thermojet shower nozzle 8 is connected combustion gas; Combustion air entrance 3 is with combustion-supportingWind pipeline 13 connects; Circulating air entrance 4 is connected with circulating air pipeline 15. For controlling the flow of each gas,Before fuel gas inlet 1, be equipped with gas control valve 20 and ball valve 19; Combustion air entrance 3 and the front peace of circulating air entrance 4There is control valve 18.
Combustion gas used in the present invention is liquefied petroleum gas, coal gas, natural gas or other fuel gas. Combustion gas is by adjustingJoint valve 20 is controlled flow, and gaseous-pressure is not less than 0.4MPa, and general processing conditions is 0.4-0.6MPa. At control valveBefore 20, be equipped with ball valve 19, can combustion gas closed and be opened. Combustion air and circulating air are respectively by combustion air pipeline 13Control flow separately with the proportion adjustable valve 18 arranging on circulating air pipeline 15. Combustion air pressure0.2-0.4MPa, combustion gas and combustion air flow-rate ratio are 1: 9 conventionally. Circulating air pressure is also 0.2-0.4MPa, its streamAmount equates with combustion air flow. Combustion gas, combustion air enter after thermojet shower nozzle 8, first interior mixed at thermojet shower nozzle 8Close, mist flows to exit under gas pressure, in flow process, more fully mix through circulating air effect,Combustion gas, combustion air and circulating air in thermojet shower nozzle 8 enter same jet, form total head. When flowing toIgnition electrode 7 places, are lighted by the electric spark of generation between ignition electrode 7 and igniter joint 2, and the γ-ray emission of burning moreLarge pressure generates diameter 40cm flame in stove, enters forming room 9 and forms high-temperature stream at mould disks 17The mould 16 of upper rotation, makes whole forming room 9 interior without low temperature corner, completes hot melt and the one-tenth of whole rotomoulded articlesType. Even if the recessed dark mould as Fig. 4, as long as concave surface is outside, the experiment proved that recess temperature and outside do not haveThere is difference.
The outer air exhauster 14 that is provided with of forming room 9, the outlet of air exhauster 14 connects hot air circulation pipeline 15. From forming room9 hot gas of discharging are sent into hot air circulation pipeline 15 through air exhauster 14, then pass in thermojet shower nozzle 8.
The present invention is directly sprayed heat in body of heater, and can not make mould 16 absorb excessive temperature affects product quality. OneThe wind action of description of test cycling hot: referring to Fig. 5, without circulating air in the situation that by the aluminium that 12mm is thickPlate is placed flame 300mm place, and after 5 minutes, temperature reaches 500 DEG C; ON cycle hot blast, flow strengthens, aluminium sheetTemperature be locked in 200-220 DEG C, therefore also reached the shortening heat time, efficiently utilize the object of the energy.
Claims (9)
1. a rotational molding machine thermojet heating system, is placed with preprocessing in the forming room of body of heater on the mould disks rotatingMould, is characterized in that: multiple thermojet shower nozzles are installed in surrounding's radial inflow of forming room, and the port of export of its gas is towards one-tenthType is indoor; Described thermojet shower nozzle is uncovered columnar structured in one end, the port of export that opening end is its gas, and it is anotherOn one end, with porous, be fuel gas inlet end; Fuel gas inlet end center is fuel gas inlet, is provided with igniter in fuel gas inletJoint, other thermal probe and the ignition electrode of being provided with of igniter joint; The other combustion air entrance, combustion air entrance of being provided with of fuel gas inlet endAnd between the port of export of gas, be provided with circulating air entrance.
2. heating system according to claim 1, is characterized in that: 4-30 is installed in surrounding's radial inflow of forming roomIndividual thermojet shower nozzle.
3. heating system according to claim 1, is characterized in that: the fuel gas inlet of thermojet shower nozzle is connected combustion gas;Combustion air entrance is connected with combustion air pipeline; Circulating air entrance is connected with circulating air pipeline.
4. heating system according to claim 3, is characterized in that: for controlling the flow of each gas, fuel gas inletBefore be equipped with gas control valve and ball valve; Before combustion air entrance and circulating air entrance, be equipped with control valve.
5. heating system according to claim 1, is characterized in that: outside forming room, be provided with air exhauster, air exhausterOutlet connects hot air circulation pipeline.
6. the workflow of a rotational molding machine thermojet heating system: fuel gas, combustion air and circulating air are penetrated by heatOn stream shower nozzle, entrance separately passes in thermojet shower nozzle; Combustion gas is by control valve control flow, and combustion air and circulating air divideNot by proportion adjustable valve control flow separately; Combustion gas, combustion air enter after the interior mixing of thermojet shower nozzle, and mist existsUnder gas pressure, flow to exit, in flow process, more fully mix through circulating air effect, when flowing to ignition electrode place,Lighted by electric spark, the larger pressure of γ-ray emission of burning generates flame in stove, makes in whole forming room without low temperature angleFall; The hot gas of discharging from forming room, after air exhauster is sent into hot air circulation pipeline, then passes in thermojet shower nozzle.
7. the workflow of heating system according to claim 6, is characterized in that: the combustion gas using is liquefactionOil gas, coal gas, natural gas or other fuel gas are 0.4-0.6MPa.
8. the workflow of heating system according to claim 7, is characterized in that: combustion air pressure is0.2-0.4MPa, circulating air pressure is also 0.2-0.4MPa.
9. the workflow of heating system according to claim 8, is characterized in that: combustion gas and combustion air flow-rate ratioBe 1: 9, circulating air flow equates with combustion air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210257481.5A CN102756448B (en) | 2012-07-25 | 2012-07-25 | Rotational molding machine thermojet heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210257481.5A CN102756448B (en) | 2012-07-25 | 2012-07-25 | Rotational molding machine thermojet heating system |
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| Publication Number | Publication Date |
|---|---|
| CN102756448A CN102756448A (en) | 2012-10-31 |
| CN102756448B true CN102756448B (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210257481.5A Expired - Fee Related CN102756448B (en) | 2012-07-25 | 2012-07-25 | Rotational molding machine thermojet heating system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110341106A (en) * | 2019-08-19 | 2019-10-18 | 义乌市拓一斯玩具有限公司 | A kind of cooling device and its toy ward off adhesive dispenser |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5356589A (en) * | 1993-03-09 | 1994-10-18 | Essef Corporation | Method and apparatus for forming rotationally cast tank liner having an end fitting |
| FR2736581B1 (en) * | 1995-07-13 | 1997-08-22 | Gallet Jean Yves | ROTOMOLDING PROCESS AND MACHINE FOR CARRYING OUT SAID METHOD |
| CN101032853A (en) * | 2006-03-07 | 2007-09-12 | 长春一汽四环恒兴汽车零部件有限公司 | Multipoint heating device of rotomoulding forming device |
| CN102120352A (en) * | 2011-01-04 | 2011-07-13 | 北京化工大学 | Rotational molding forming device |
-
2012
- 2012-07-25 CN CN201210257481.5A patent/CN102756448B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5356589A (en) * | 1993-03-09 | 1994-10-18 | Essef Corporation | Method and apparatus for forming rotationally cast tank liner having an end fitting |
| FR2736581B1 (en) * | 1995-07-13 | 1997-08-22 | Gallet Jean Yves | ROTOMOLDING PROCESS AND MACHINE FOR CARRYING OUT SAID METHOD |
| CN101032853A (en) * | 2006-03-07 | 2007-09-12 | 长春一汽四环恒兴汽车零部件有限公司 | Multipoint heating device of rotomoulding forming device |
| CN102120352A (en) * | 2011-01-04 | 2011-07-13 | 北京化工大学 | Rotational molding forming device |
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| CN102756448A (en) | 2012-10-31 |
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Address after: 528200, Guangdong, Foshan Province Nanhai District Guicheng Ken Ken West Village large plastic factory Applicant after: GUANGDONG SHANDA PLASTIC FACTORY Address before: 528200, Guangdong, Foshan Province Nanhai District Guicheng Ken Ken West Village large plastic factory Applicant before: Foshan Nanhai Guicheng Shanda Plastic Factory |
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Free format text: CORRECT: APPLICANT; FROM: FOSHAN NANHAI GUICHENG SHANDA PLASTIC FACTORY TO: GUANGDONG SHANDA PLASTIC FACTORY |
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Effective date of registration: 20160429 Address after: 528518 Guangdong province Gaoming District of Foshan city town Ming Ming Fu Road No. 72, the first floor workshop C D Applicant after: Guangdong Shanda Plastic Technology Co., Ltd. Address before: 528200, Guangdong, Foshan Province Nanhai District Guicheng Ken Ken West Village large plastic factory Applicant before: GUANGDONG SHANDA PLASTIC FACTORY |
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Effective date of registration: 20180315 Address after: 528518 Guangdong province Gaoming District of Foshan city town Ming Ming Fu Road No. 72 Patentee after: FOSHAN ZHONGBAO TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 528518 Guangdong province Gaoming District of Foshan city town Ming Ming Fu Road No. 72, the first floor workshop C D Patentee before: Guangdong Shanda Plastic Technology Co., Ltd. |
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Granted publication date: 20160525 Termination date: 20180725 |