CN101934914A - Dynamic weighing belt feeder - Google Patents
Dynamic weighing belt feeder Download PDFInfo
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- CN101934914A CN101934914A CN2009101587680A CN200910158768A CN101934914A CN 101934914 A CN101934914 A CN 101934914A CN 2009101587680 A CN2009101587680 A CN 2009101587680A CN 200910158768 A CN200910158768 A CN 200910158768A CN 101934914 A CN101934914 A CN 101934914A
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Abstract
The invention relates to a dynamic weighing belt feeder which consists of a feeding part and a weighing part, wherein, the feeding part comprises a frame, a guide chute, a tensioning device, a conveying appliance and a drive unit; the weighing part comprises a weighing supporting roller, a weighing frame, a weighing sensor and a velocity sensor; the feeding part is divided into a storehouse pressing region, a stabilizing region and a discharging region; and the weighing supporting roller of the weighing part is arranged in the stabilizing region between the storehouse pressing region and the discharging region of the feeding part, the weighing frame is arranged under the weighing supporting roller, the weighing sensor is arranged between the lower part of the weighing frame and the frame, and the velocity sensor is arranged on a rolling drum or the supporting roller. The dynamic weighing belt feeder has the advantages of large feeding quantity, small volume, high weighing precision, is simple to use and maintain smash resistance, wear resistance, water resistance and explosion prevention, thus can be applied to severe environment.
Description
Technical field
The invention belongs to bulk material and reprint the feed metering outfit, be specifically related to a kind of dynamic weighing apron feeder.
Background technology
At present, along with the raising of bulk material delivery system degree of automation and the raising of load transfer device transport efficiency, also more and more higher to the transport efficiency and the functional requirement of reprinting feeding device, reprint the equipment that has function of measuring in the feed process at bulk material, the reprinting feeding device that especially has a dynamic measurement function obtains application more and more widely.
Current, the belt Weighing feeder is that the dynamic measurement of using comparative maturity in the bulk material delivery system is reprinted feeding device, the belt Weighing feeder generally is made up of adhesive tape type feedway and gauging device, carrying roller below the adhesive tape type feedway adhesive tape is for lifting roller, in order to improve feeding coal and to prevent that material is unrestrained, the adhesive tape type feedway generally adopts the rubber conveyer belt of band rib, but, because load-transfer device rib height is limited, under the certain situation of belt speed, its feeding coal is less, in order to increase feeding coal, the general method of widening load-transfer device that adopts, cause belt Weighing feeder volume bigger, it is bigger to take up room, and feeding coal but can not significantly improve, delivery system is to the requirement of reprinting feeding device charge efficiency and the precision metering traffic capacity of existing installation head and shoulders above, and the belt Weighing feeder of prior art can not satisfy the demand of big feeding coal; Moreover the load-transfer device of existing belt Weighing feeder adopts rubber tape, uses in environment such as mine, metallurgy and is often smashed, tears, weares and teares, and can not adapt to abominable, complicated operating mode, and service life is shorter.
Only have material and reprint the apron feeder of feed function, make the feed section big owing to have higher deflector chute, so feeding coal is big, and feed has satisfied the demand of current material-transporting system to big feeding coal evenly, continuously.Because loose unpacked material has certain slope angle of repose, and quiet slope angle of repose is greater than moving slope angle of repose, at the apron feeder feed end, begin from Hatch Opening, to piling up the zone that is covered with moving slope angle of repose, material is to the pressure of load-transfer device, except that being subjected to the solid accumulation effect of altitude, also be subjected to the influence that press in the storehouse and the storehouse pressure fluctuates, this zone can be described as the storehouse nip, at place, the nearly emptying point of apron feeder discharge end, material is inwardly piled up with moving slope angle of repose from the emptying point, and material is subjected to the instability that influences of discharging to the pressure of load-transfer device, and this zone can be described as discharge zone, these two regional materials are subjected to multiple factor affecting to the pressure of load-transfer device, change bigger.Present apron feeder design, when satisfying big feeding coal, make every effort to reduce volume and weight, the feeder fuselage designs is shorter, and storehouse nip and discharge zone are connected substantially, as being the increase function of measuring, below the load-transfer device of apron feeder, gauging device is installed,, is made metering result's accuracy rate lower owing to be subjected to storehouse nip and discharge zone to the influence that load-transfer device pressure changes, error is bigger, can't reach the requirement of material-transporting system to precision.
Summary of the invention
For overcoming the deficiency that existing installation exists, the object of the invention is to provide a kind of feeding coal big, little, accurate, wear-resisting, the anti-dynamic weighing apron feeder of pounding of weighing of volume.
The present invention is achieved by the following technical solutions: promptly a kind of dynamic weighing apron feeder, form by the feed partial sum part of weighing.
Feed partly comprises frame, deflector chute, tightening device, feedway and actuating device, feedway is made up of head roll, changed course cylinder, load-transfer device and carrying roller, head roll and changed course cylinder are installed in the two ends of frame respectively, cycloconveyor belt is around head roll and changed course cylinder, below the load-transfer device epimere between head roll and the changed course cylinder plurality of load bearing carrying roller is set, with support belt and top material.Be provided with deflector chute above the load-transfer device of feedway, deflector chute is fixed on the frame.Tightening device plays tension to load-transfer device, and actuating device is the propulsion source of feedway, drives conveyor running.
Avoid the influence of storehouse nip and discharge zone in order to make the part of weighing, improve weighing precision, the fuselage of lengthening feed part, make storehouse nip and discharge zone at a distance of certain distance, forming one section load-transfer device pressure between two sections of storehouse nip and discharge zones had not only had the storehouse to press influence but also had not had the zone of discharging influence, the regional load-transfer device pressure of this section only is subjected to the material gravity effect, and pressure is basicly stable, can be described as the stable region.
Establish the part of weighing in the apron feeder stable region, the part of weighing comprises weighing carrier roller, scale frame, LOAD CELLS, speed sensor.Its basic structure is: below the stable section load-transfer device epimere between storehouse nip and discharge zone weighing carrier roller is set, for making LOAD CELLS stressed evenly, a plurality of weighing carrier rollers can be set, weighing carrier roller places on the scale frame, scale is placed on the LOAD CELLS, LOAD CELLS is fixed on the frame, and LOAD CELLS is provided with height adjusting screw rod, can regulate the height of scale frame by the handwheel on the rotation adjusting screw(rod).
LOAD CELLS quantity can be one or more, LOAD CELLS adopts ball pivot to be connected with the scale frame, when LOAD CELLS quantity is 1 or 2, for restriction scale frame is swung around ball pivot, it is one or more that the scale frame is provided with the armed lever of rigidity, the armed lever lower end is one section suitable distance under ball pivot, this distance satisfies that to apply less power in the armed lever lower end be the swing of may command scale frame around ball pivot, the armed lever lower end is established girt at different directions it is applied certain pulling force, pulling force by armed lever to the scale frame produce with the scale frame around the opposite moment of ball pivot swaying direction, make scale frame maintenance level, only can produce displacement at vertical direction; Because pull bar horizontal arrangement, the pull bar two ends adopt hinged securement, pull bar to have sufficient length and flexibility, and because LOAD CELLS is very little at the displacement of vertical direction, so that pull bar produces the component of vertical direction hardly to the scale frame, the pressure that the scale frame is called oneself the great trust roller in the future all vertically acts on the LOAD CELLS, has guaranteed the accuracy and the stability of weighing.
Be subjected to the influence of load-transfer device tensile force for fear of weighing carrier roller, make weigh more accurate, respectively be provided with one group before and after the weighing carrier roller and adjust carrying roller, adjusting carrying roller is installed on the adjustment carrier roller frame, adjusting carrier roller frame is installed on the frame, adjust between carrier roller frame and the frame and be provided with the adjustment screw rod, can regulate height and the level of adjusting carrier roller frame.By adjusting the height adjusting screw rod on the LOAD CELLS respectively and adjusting adjusting screw(rod) on the carrier roller frame, their carrying roller upper surface is remained on the horizontal surface of a permissible error scope, eliminated of the influence of load-transfer device tensile force to weighing.
Speed sensor is arranged on cylinder or carrying roller one end, is used to detect the running velocity of load-transfer device, and because of head roll may skid and carrying roller may dally, the best is arranged on an end of changed course cylinder.
In order to make load-transfer device obtain shock-resistant, anti abrasive result of use, make it more can adapt to bad working environments such as mine, metallurgy, it is Two-dimentional Flexible Carry Secretly and the adhesive tape combination of ZL200520012261.1 that load-transfer device can adopt the patent No..
In order to make weighing system reliable, accurate, it is the force gauge of 92245681.X that LOAD CELLS is selected the patent No. for use, this product can use in trickle, inflammable, explosive environments, can adapt to the environment that the temperature difference is big, lateral impact power is bigger, and no temperature is floated, drift, time are floated.
Dynamic weighing apron feeder of the present invention is compared with existing installation, has that feeding coal is big, volume is little, weighs accurately, working service simply, wear-resisting, anti-is pounded, waterproof, explosion-proof, the advantage that can be applicable to harsh environment.
Description of drawings
Fig. 1 is the front view of dynamic weighing apron feeder embodiment 1;
Fig. 2 is the D-D cutaway view among Fig. 1;
Fig. 3 is the part-structure figure that weighs of embodiment 1;
Fig. 4 is the part birds-eye view of weighing of embodiment 1;
Fig. 5 is the partial enlarged drawing of E among the part-structure figure that weighs of embodiment 1;
Fig. 6 is the front view of embodiment 2;
Fig. 7 is the part birds-eye view of weighing of embodiment 2.
Among the figure: a feed part, the b part of weighing, 1 material outlet, 2 deflector chutes, 3 actuating devices, 4 tightening devices, 5 frames, 6 head rolls, 7 load-transfer devices, 7.1 adhesive tape, 7.2 first band, 8 feedways, 9 load-bearing carrying rollers, 10 changed course cylinders, 11 weighing carrier rollers, 12 scale framves, 13 LOAD CELLS, 13.1 adjusting screw(rod), 13.2 handwheel, 14 armed levers, 15 pull bars, 16 adjust carrying roller, 17 adjust carrier roller frame, 18 adjusting screw(rod)s, 19 speed sensors, A storehouse nip, the B discharge zone, the C stable region, D analyses and observe mark, the local magnifying tags of E, F two ball pivot lines, α moves slope angle of repose.
The specific embodiment
Embodiment 1
As Fig. 1, Fig. 2, a kind of dynamic weighing apron feeder is made up of the feed part a and the part b that weighs.
Feed part a comprises frame 5, deflector chute 2, tightening device 4, feedway 8 and actuating device 3, and feedway 8 is made up of head roll 6, changed course cylinder 10, load-transfer device 7 and load-bearing carrying roller 9, and load-transfer device 7 is made up of adhesive tape 7.1 and first band 7.2.Head roll 6 and changed course cylinder 10 are installed in the two ends of frame 5 respectively, endless rubber belt 7.1 is around head roll 6 and changed course cylinder 10, first band 7.2 is looped around outside the adhesive tape 7.1, plurality of load bearing carrying roller 9 is set below head roll 6 and load-transfer device 7 epimeres of changed course between the cylinder 10.Be provided with deflector chute 2 above the load-transfer device 7 of feedway 8, deflector chute 2 bottoms are fixed on the frame 5, and the top feed end is connected with material outlet 1.4 pairs of load-transfer devices 7 of tightening device play tension, and actuating device 3 is the propulsion source of feedway 8, drive feedway 8 runnings.
In order to make the part b that weighs avoid the influence of storehouse nip A and discharge zone B, improve weighing precision, the fuselage of lengthening feed part a, make storehouse nip A and discharge zone B at a distance of certain distance, forming one section between two sections of storehouse nip A and discharge zone B be stable region C, and load-transfer device 7 pressures not only do not have the storehouse to press influence but also do not have discharging to influence in this district, and regional load-transfer device 7 pressures of this section only are subjected to the material gravity effect, pressure is basicly stable, helps the raising of weighing precision.
As Fig. 3, Fig. 4, Fig. 5, the C section is established the part b that weighs in the apron feeder stable region, and the part of weighing b comprises weighing carrier roller 11, scale frame 12, LOAD CELLS 13, speed sensor 19.Its basic structure is: below load-transfer device 7 epimeres of the stable region C section between storehouse nip A and discharge zone B weighing carrier roller 11 is set, for making LOAD CELLS 13 stressed even, 3 weighing carrier rollers 11 are set, 3 weighing carrier rollers 11 place on the scale frame 12, scale frame 12 places on two LOAD CELLS 13, LOAD CELLS 13 is fixed on the frame 5, and LOAD CELLS 13 is provided with height adjusting screw rod 13.1, can regulate the height of scale frame 12 by the handwheel 13.2 on the rotation adjusting screw(rod) 13.1.
LOAD CELLS 13 adopts ball pivot to be connected with scale frame 12, for restriction scale frame 12 is swung around two ball pivot line F, scale frame 12 both sides are respectively equipped with vertical rigidity armed lever 14, armed lever 14 lower ends adopt two pairs of symmetrically arranged girts 15 that it is applied certain pulling force, the direction of pull bar 15 is perpendicular to the line F of two ball pivots, armed lever 14 lower ends are one section suitable distance under ball pivot, pulling force by 14 pairs of scale framves of armed lever 12 produce with scale frame 12 around the opposite moment of two ball pivot line F swaying directions, make scale frame 12 maintenance levels, only can produce displacement at vertical direction; Because pull bar 15 horizontal arrangement, pull bar 15 two ends adopt hinged securement, pull bar 15 to have sufficient length and flexibility, and because LOAD CELLS 13 is very little at the displacement of vertical direction, make 15 pairs of scale framves 12 of pull bar produce the component of vertical direction hardly, the pressure that scale frame 12 is called oneself great trust roller 11 in the future all vertically acts on the LOAD CELLS 13, has guaranteed the accuracy and the stability of weighing.
Influenced by the tensile force of load-transfer device 7 for fear of weighing carrier roller 11, make weigh more accurate, weighing carrier roller 11 front and back respectively are provided with one group 3 and adjust carrying roller 16, adjusting carrying roller 16 is installed on the adjustment carrier roller frame 17, adjusting carrier roller frame 17 is installed on the frame 5, adjust to be provided with between carrier roller frame 17 and the frame 5 and adjust screw rod 18, can regulate height and the level of adjusting carrier roller frame 17.By the adjusting screw(rod) 18 on adjusting screw(rod) 13.1 on the adjustment LOAD CELLS 13 and the adjustment carrier roller frame 17, to regulate weighing carrier roller 11 and the height of adjusting carrying roller 16 respectively, their carrying roller upper surface is remained on the horizontal surface of a permissible error scope, eliminated of the influence of load-transfer device tensile force weighing.
For avoiding because of the influence that head roll 6 may skid and carrying roller may dally, speed sensor 19 is arranged on an end of changed course cylinder 10, is used to detect the running velocity of feedway 8.
In order to make load-transfer device 7 obtain shock-resistant, anti abrasive result of use, make it more can adapt to bad working environments such as mine, metallurgy, the first band 7.2 employing patent No.s are 200520012261.1 Two-dimentional Flexible Carry Secretly.
In order to make weighing system reliable, accurate, LOAD CELLS 13 selects for use the patent No. to be: the force gauge of 92245681.X, this product can use in trickle, inflammable, explosive environments, can adapt to the environment that the temperature difference is big, lateral impact power is bigger, and no temperature is floated, drift, time are floated.
As Fig. 6, Fig. 7, a kind of dynamic weighing apron feeder is made up of the feed part a and the part b that weighs, and the part of weighing b comprises weighing carrier roller 11, scale frame 12, LOAD CELLS 13, speed sensor 19.Its basic structure is: below load-transfer device 7 epimeres of the stable region C section between storehouse nip A and discharge zone B weighing carrier roller 11 is set, for making LOAD CELLS 13 stressed even, 3 weighing carrier rollers 11 are set, 3 weighing carrier rollers 11 place on the scale frame 12, scale frame 12 places on four LOAD CELLS 13, LOAD CELLS 13 is fixed on the frame 5, and LOAD CELLS 13 is provided with height adjusting screw rod 13.1, can regulate the height of scale frame 12 by the handwheel 13.2 on the rotation adjusting screw(rod) 13.1.
Because scale frame 12 mainly is subjected to self gravitation and from the pressure of carrying roller, and the less power of horizontal direction is born by LOAD CELLS 13, and four LOAD CELLS 13 are formed a planar support, has limited the displacement beyond scale frame 12 vertical displacements, does not need to be provided with pull bar.
All the other structures are with embodiment 1.
The structure that meets the present technique principle is not limited only to above embodiment.
Claims (5)
1. dynamic weighing apron feeder, form by the feed partial sum part of weighing, feed partly comprises frame, deflector chute, tightening device, feedway and actuating device, it is characterized in that feed partly is divided into storehouse nip, stable region and discharge zone, the stable region of weighing carrier roller between storehouse nip and discharge zone of the part of weighing.
2. dynamic weighing apron feeder according to claim 1, the part that it is characterized in that weighing comprises weighing carrier roller, scale frame, LOAD CELLS and speed sensor, weighing carrier roller places on the scale frame, be provided with LOAD CELLS below the scale frame and between the frame, speed sensor is installed on cylinder or the carrying roller.
3. according to claim 1,2 described dynamic weighing apron feeders, it is characterized in that LOAD CELLS and scale frame adopt ball pivot to be connected, the scale frame adopts girt to limit its swing around the LOAD CELLS ball pivot, the synergy of pull bar and ball pivot, make the scale frame and on weighing carrier roller only can be in movement in vertical direction, guarantee that gravity is added on the LOAD CELLS smoothly.
4. dynamic weighing apron feeder according to claim 1 is characterized in that being provided with the adjustment carrying roller before and after the weighing carrier roller.
5. feedway according to claim 1 is characterized in that the load-transfer device of feedway can be adhesive tape or first band, also can be the assemblage zone of adhesive tape and first band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101587680A CN101934914A (en) | 2009-07-01 | 2009-07-01 | Dynamic weighing belt feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101587680A CN101934914A (en) | 2009-07-01 | 2009-07-01 | Dynamic weighing belt feeder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101934914A true CN101934914A (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101587680A Pending CN101934914A (en) | 2009-07-01 | 2009-07-01 | Dynamic weighing belt feeder |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322925A (en) * | 2011-05-31 | 2012-01-18 | 杭州四五○九机电设备有限公司 | High-precision electronic belt scale and weighing algorithm of same |
| CN102514906A (en) * | 2011-12-22 | 2012-06-27 | 江阴大地装备股份有限公司 | Freight space detecting device of semi-portal type scraper |
| CN103204352A (en) * | 2013-03-25 | 2013-07-17 | 中国矿业大学 | Continuous dynamic weighing chain belt type feeding machine |
| CN103241516A (en) * | 2013-04-16 | 2013-08-14 | 武汉理工大学 | Novel belt conveyor idler system |
| CN103662599A (en) * | 2012-09-18 | 2014-03-26 | 昆山尚达智机械有限公司 | Belt conveyor with weighing function |
| CN105417097A (en) * | 2015-12-29 | 2016-03-23 | 武汉新华源电力设备有限公司 | Precise ingredient activation feeder |
| CN105731024A (en) * | 2016-04-19 | 2016-07-06 | 深圳市杰曼科技股份有限公司 | Weighing and transporting device |
| CN106315171A (en) * | 2015-06-29 | 2017-01-11 | 青阳县迎春炉料有限公司 | Automatic weighing device used for lime processing |
| WO2017071631A1 (en) * | 2015-10-28 | 2017-05-04 | 刘素华 | Dynamic weighing constant temperature metric conveyor |
| CN107010358A (en) * | 2017-05-27 | 2017-08-04 | 杭州易闻科技有限公司 | A kind of weighing system based on intelligent conveying process |
| CN107792623A (en) * | 2017-09-26 | 2018-03-13 | 采赫（天津）科技发展有限公司 | A kind of belt burden balance |
| CN107902343A (en) * | 2017-09-27 | 2018-04-13 | 刘道灵 | A kind of intelligence coal conveying arrangement |
| EP3219650A4 (en) * | 2014-11-11 | 2018-08-01 | Shanghai Wood-based Panel Machinery Co., Ltd. | Double-weighing metering storage hopper |
| WO2018206008A1 (en) * | 2017-05-12 | 2018-11-15 | 刘素华 | Lateral strip positioning and multi-dimensional overall leakage prevention chain belt feeder implementing method for lateral strip positioning and multi-dimensional overall leakage prevention of feeder conveyor |
| CN110665837A (en) * | 2019-09-12 | 2020-01-10 | 湖南工业大学 | Monitoring equipment for thick sauce packaging production line |
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| CN201472980U (en) * | 2009-07-01 | 2010-05-19 | 孟凡英 | Dynamic weighing belt feeding machine |
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| US6437255B1 (en) * | 1997-01-17 | 2002-08-20 | K-Tron Technologies, Inc. | Conveyor scale |
| CN2362817Y (en) * | 1999-01-04 | 2000-02-09 | 中煤精工科技开发有限责任公司 | Material conveyer |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322925A (en) * | 2011-05-31 | 2012-01-18 | 杭州四五○九机电设备有限公司 | High-precision electronic belt scale and weighing algorithm of same |
| CN102514906A (en) * | 2011-12-22 | 2012-06-27 | 江阴大地装备股份有限公司 | Freight space detecting device of semi-portal type scraper |
| CN102514906B (en) * | 2011-12-22 | 2012-11-21 | 江阴大地装备股份有限公司 | Freight space detecting device of semi-portal type scraper |
| CN103662599A (en) * | 2012-09-18 | 2014-03-26 | 昆山尚达智机械有限公司 | Belt conveyor with weighing function |
| CN103204352A (en) * | 2013-03-25 | 2013-07-17 | 中国矿业大学 | Continuous dynamic weighing chain belt type feeding machine |
| CN103204352B (en) * | 2013-03-25 | 2015-12-09 | 中国矿业大学 | A kind of dynamic weighing chain belt type feeding machine continuously |
| CN103241516B (en) * | 2013-04-16 | 2016-09-21 | 武汉理工大学 | A kind of carrier roller of belt conveyer system |
| CN103241516A (en) * | 2013-04-16 | 2013-08-14 | 武汉理工大学 | Novel belt conveyor idler system |
| EP3219650A4 (en) * | 2014-11-11 | 2018-08-01 | Shanghai Wood-based Panel Machinery Co., Ltd. | Double-weighing metering storage hopper |
| CN106315171A (en) * | 2015-06-29 | 2017-01-11 | 青阳县迎春炉料有限公司 | Automatic weighing device used for lime processing |
| WO2017071631A1 (en) * | 2015-10-28 | 2017-05-04 | 刘素华 | Dynamic weighing constant temperature metric conveyor |
| CN105417097A (en) * | 2015-12-29 | 2016-03-23 | 武汉新华源电力设备有限公司 | Precise ingredient activation feeder |
| CN105731024A (en) * | 2016-04-19 | 2016-07-06 | 深圳市杰曼科技股份有限公司 | Weighing and transporting device |
| WO2018206008A1 (en) * | 2017-05-12 | 2018-11-15 | 刘素华 | Lateral strip positioning and multi-dimensional overall leakage prevention chain belt feeder implementing method for lateral strip positioning and multi-dimensional overall leakage prevention of feeder conveyor |
| CN108861461A (en) * | 2017-05-12 | 2018-11-23 | 刘素华 | A kind of oblique side blanking of reverse-feeding subtracts interference dynamic weighting batcher |
| CN108861461B (en) * | 2017-05-12 | 2024-04-02 | 刘素华 | Reverse material conveying inclined side blanking interference reducing dynamic weighing metering feeder |
| CN107010358A (en) * | 2017-05-27 | 2017-08-04 | 杭州易闻科技有限公司 | A kind of weighing system based on intelligent conveying process |
| CN107792623A (en) * | 2017-09-26 | 2018-03-13 | 采赫（天津）科技发展有限公司 | A kind of belt burden balance |
| CN107902343A (en) * | 2017-09-27 | 2018-04-13 | 刘道灵 | A kind of intelligence coal conveying arrangement |
| CN110665837A (en) * | 2019-09-12 | 2020-01-10 | 湖南工业大学 | Monitoring equipment for thick sauce packaging production line |
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Application publication date: 20110105 |