CN105855483A - Device for preventing loose sand suspension in dip-coating unit and dip-coating method of device - Google Patents
Device for preventing loose sand suspension in dip-coating unit and dip-coating method of device Download PDFInfo
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- CN105855483A CN105855483A CN201610372471.4A CN201610372471A CN105855483A CN 105855483 A CN105855483 A CN 105855483A CN 201610372471 A CN201610372471 A CN 201610372471A CN 105855483 A CN105855483 A CN 105855483A
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- dip
- coating
- sand
- lotion
- dipping unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
- B22C23/02—Devices for coating moulds or cores
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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
Abstract
The invention relates to a device for preventing loose sand suspension in a dip-coating unit and a dip-coating method of the device, and belongs to the casting technical field. The device is used for controlling the content of sand particles in a dip-coating liquid during dip-coating of a sand core, and comprises the dip-coating unit with an upper open mouth, and a stirring tank, wherein an input pipeline and an output pipeline are connected between the dip-coating unit and the stirring tank; an input pump and an output pump are connected onto the input pipeline and the output pipeline, respectively; the dip-coating unit comprises a dip-coating area and stirring areas at the two sides of the dip-coating area; stirring devices I are separately arranged in the stirring areas; the dip-coating area and the stirring areas are separated by gratings; the bottom of the dip-coating area is provided with a funnel-shaped sedimentation tank; the bottommost part of the sedimentation tank is provided with a sand discharge valve; and a sand liquid isolating net is formed in a funnel-shaped upper opening of the sedimentation tank. The device can control the content of sand particles in a coating liquid in the dip-coating tank, so that the content of sand in the dip-coating liquid is at a relatively low level for a long time, the sand core dip-coating quality is stabilized, and the service life of the dip-coating liquid is prolonged.
Description
Technical field
The present invention relates to casting technology field, prevent, particularly to a kind of, device and the dip-coating method thereof that in dipping unit, loose sand suspends, when being used for controlling core dip-coating, in dipping unit, be coated with the content of feed liquid medium sand grain.
Background technology
After core completes, even across cleaning, its surface still can retain certain loose sand or floating sand, by surface with the core of loose sand or floating sand in dipping unit during dip-coating, part loose sand thereon or floating sand will be fallen in dipping unit；Along with the increase of dip-coating number of times, dipping unit accumulates loose sand amount the most；When the sand content in coating exceedes to a certain degree, the performance of coating will be affected, and be finally reflected in the surface quality of foundry goods.At present to this problem, the method taked in production practices is: when in coating, sand content accumulates the degree affecting coating property, is drained by the coating in whole pond, then rejoins new coating.This mode causes serious paint waste.
The coating of dip-coating core is made up of refractory aggregate, water, suspending agent and other auxiliary agent.Refractory aggregate granule is very thin, suspends the most in a liquid, has the effect of suspending agent in addition, and the coating after therefore stirring typically will not precipitate in 24 hours, if coating has agitation always, then coating can not precipitate in the longer time.And the loose sand on core surface, its granule is relatively large, and particle diameter is typically at 0.1 ~ 0.3mm, in static coating, loose sand can be deposited to bottom dipping unit faster, but when coating is stirred, can be suspended in coating again, the granularity causing coating is excessive and affects core surface quality.Thus, how to make the loose sand falling in dipping unit to be suspended in because of stirring in coating, just seem the most urgent.
Summary of the invention
The present invention is directed to the deficiency that core dipping process in prior art exists, it is provided that a kind of prevent the device that in dipping unit, loose sand suspends, to solve lotion medium sand containing the big problem of quantitative change.
The object of the present invention is achieved like this, a kind of device preventing loose sand in dipping unit from suspending, including unlimited dipping unit suitable for reading and agitator tank, connect between described dipping unit and agitator tank and have input channel and output channel, on described input channel and it is connected to front pump and rear pump on output channel, described dipping unit includes dip-coating district and the stirring area of both sides, dip-coating district, is respectively equipped with agitating device one, is separated by grid between described dip-coating district and stirring area in described stirring area；The bottom in described dip-coating district is provided with the sedimentation basin of bucket shape, and the bottommost of described sedimentation basin is provided with sand flash valve, and the bucket shape of described sedimentation basin is suitable for reading is provided with sand liquid separation net.
During apparatus of the present invention work, first pass through agitator tank by lotion mix homogeneously, then through input channel, lotion is conveyed into dipping unit by front pump, then core dip-coating is carried out, in dip coating process, agitating device one starts makes lotion with certain speed flowing, to keep aggregate in lotion to be in suspended state, thus ensures the performance of lotion；The sedimentation basin of bucket shape is set in the bottom in dip-coating district, and separated by sand liquid separation net, particle diameter in lotion and heavy loose sand granule gradually precipitates and falls into sedimentation basin through the mesh of sand liquid separation net, and the compartmentation of sand liquid separation net has isolated lotion disturbance, thus the loose sand of sedimentation basin is avoided to kick up；When the loose sand of sedimentation basin deposit to a certain amount of after by dip-coating district, top lotion by the most defeated time agitator tank of rear pump, the then sand setting in discharge cleaning sedimentation basin, then lotion blowback dipping unit is continuing with, thus extend the service life of lotion.
For ease of realizing circulating of dip-coating district lotion, the flat shape in described dip-coating district is rectangle, in described stirring area, symmetrical along the diagonally opposing corner direction in rectangle dip-coating district (arranging, described agitating device one includes extending into the stirring motor of setting on the upside of the stirring blade liquid level of stirring area within and liquid level in the position that arranges of agitating device one.In the present invention, the agitating device one arranged in diagonally opposing corner direction, circulating of dip-coating district liquid can be promoted, and advantageously ensure that dip-coating district flow rate of liquid everywhere is uniform, thus ensure that the uniform suspended state of lotion is to ensure the performance of lotion.
For preventing the sand liquid in sedimentation basin from kicking up further, the diapire of described stirring area is higher than the height of sand liquid separation net or same with sand liquid separation net high.
For ease of cleaning and flushing sedimentation basin, described sand liquid separation net is while being connected by hinge is turning with the inwall of dipping unit, the dipping unit inwall that the another side of described sand liquid separation net is corresponding is provided with Support bracket, and the upside of the sand liquid separation net that described Support bracket is corresponding is fixed with draw ring.
Further, also being provided with agitating device two in described agitator tank, the bottom of described agitator tank is provided with waste valve.
It is a further object to provide a kind of dip-coating method using said apparatus, comprise the steps:
The first step, is added in agitator tank in proportion by coating oleo stock and water, starts the agitating device two on agitator tank, starts front pump by lotion after being stirred by lotion in input channel is conveyed into dipping unit；
Second step, after the liquid level in dipping unit is answered and met the height and position of submergence workpiece, closes front pump, and starts the stirring motor of agitating device one, makes the lotion of dipping unit is constantly in flowing and suspended state；
3rd step, core is immersed in dipping unit, make core need the face of dip-coating submerge in lotion and stop 3 ~ 5 seconds, make coating be substantially adhered to core surface, then take out core, carry out the dip-coating of next core workpiece, when core dip-coating, the loose sand on its surface can drop in coating, owing to loose sand granule is relatively big, gradually precipitates in the lotion of sluggish flow, and through sand liquid separation net, be deposited in sedimentation basin；Meanwhile, the loose sand that major part precipitates is isolated in sedimentation basin by sand liquid separation net；
4th step, through more than one piece core dip-coating, when in sedimentation basin loose sand deposition to sedimentation basin height 3/4ths time, stop dip-coating, stop agitating device one and stir, start rear pump and by output channel, lotion is delivered in agitator tank from dip-coating district；
5th step, when the lotion liquid level in dip-coating district is less than the height of output channel connector, close rear pump, open the sand flash valve of sedimentation basin, and upwards open sand liquid separation net, the loose sand deposited in sedimentation basin discharged and sedimentation basin and sand liquid separation net are rinsed well in the lump, being then shut off sand flash valve and sand liquid separation net；
6th step, restarts agitating device two, opens front pump after being stirred by the lotion in agitator tank, lotion in agitator tank is inputted again dipping unit, again carries out core dip-coating, such iterative cycles, until lotion reaches Rejection standard, discharge lotion from the waste valve of agitator tank.
For reducing lotion loose sand amount further, in described 5th step, when discharging and rinsing the loose sand in sedimentation basin, the static most loose sand in a moment of lotion in agitator tank is deposited in tank bottoms, opens waste valve and discharges the chiltern of partly precipitated；In 6th step, supplement in proportion after being again started up agitating device two and add coating oleo stock and water, to meet liquid level during dipping unit dip-coating workpiece.
For being further ensured that the suspended state of lotion, when the agitating device two in described agitator tank works, the flow rate of liquid in agitator tank is 3-4m/s, and when described agitating device one works, in dipping unit, the flow velocity of liquid is 1-2 m/s.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram preventing loose sand in dipping unit from suspending of the present invention.
Fig. 2 is the liquid stream schematic diagram in dipping unit.
Wherein, 1 agitating device two；2 agitator tanks；3 waste valves；4 input channels；5 front pumps；6 rear pumps；7 output channels；8 agitating devices one；8A stirring blade；8B stirring motor；9 dipping units；9A dip-coating district；9B stirring area；10 grids；11 sedimentation basins；12 sand flash valves；13 sand liquid separation nets.
Detailed description of the invention
Embodiment 1
As depicted in figs. 1 and 2, the device that loose sand in dipping unit suspends is prevented for the present invention, including unlimited dipping unit 9 suitable for reading and agitator tank 2, connect between dipping unit 9 and agitator tank 2 and have input channel and 4 output channels 7, on input channel 4 and it is connected to front pump 5 and rear pump 6 on output channel 7, dipping unit 9 includes dip-coating district 9A and the stirring area 9B of 9A both sides, dip-coating district, is respectively equipped with agitating device 1 in the 9B of stirring area, is separated by grid 10 between dip-coating district 9A and stirring area 9B；The bottom of dip-coating district 9A is provided with the sedimentation basin 11 of bucket shape, and the bottommost of sedimentation basin 11 is provided with sand flash valve 12, and the bucket shape of sedimentation basin 11 is suitable for reading is provided with sand liquid separation net 13.
For ease of realizing circulating of dip-coating district 9A lotion, the flat shape of dip-coating district 9A is rectangle, in the 9A of stirring area, the position that arranges of agitating device 1 is symmetrical arranged along the diagonally opposing corner direction in rectangle dip-coating district, and agitating device 1 includes extending into the stirring motor 8B arranged on the upside of the stirring blade 8A within the liquid level of stirring area and liquid level.In the present invention, the agitating device 1 arranged in diagonally opposing corner direction, circulating of dip-coating district 9A liquid can be promoted, and advantageously ensure that dip-coating district 9A flow rate of liquid everywhere is uniform, thus ensure that the uniform suspended state of lotion is to ensure the performance of lotion.
For preventing the sand liquid in sedimentation basin 11 from kicking up further, the diapire of stirring area 9B is higher than the height of sand liquid separation net 13 or same with sand liquid separation net 13 high.
For ease of cleaning and flushing sedimentation basin 11, sand liquid separation net 13 is while being connected by hinge is turning with the inwall of dipping unit 9, dipping unit 9 inwall that the another side of sand liquid separation net 13 is corresponding is provided with Support bracket, and the upside of the sand liquid separation net 13 that Support bracket is corresponding is fixed with draw ring.
Further, also being provided with agitating device 21 in agitator tank 2, the bottom of agitator tank 2 is provided with waste valve 3.
During apparatus of the present invention work, first pass through agitator tank by lotion mix homogeneously, then through input channel 4, lotion is conveyed into dipping unit 9 by front pump 5, then core dip-coating is carried out, in dip coating process, agitating device 1 starts makes lotion with certain speed flowing, to keep the suspended state of skeleton particle in lotion, thus ensures the performance of lotion；The sedimentation basin 11 of bucket shape is set in the bottom of dip-coating district 9A, and separated by sand liquid separation net 13, particle diameter in lotion is big and heavy loose sand granule gradually mesh through sand liquid separation net 13 falls into sedimentation basin 11, and the compartmentation of sand liquid separation net 13 has isolated lotion disturbance, thus the loose sand of sedimentation basin 11 is avoided to kick up；When the loose sand of sedimentation basin 11 deposit to a certain amount of after to facilitate the sand setting in discharge cleaning sedimentation basin 11, thus the service life of lotion can be extended by the lotion of dip-coating district, top 9A by 6 the most defeated times agitator tanks of rear pump 2.
Embodiment 2
Use the dip-coating method of the device of above-described embodiment, comprise the steps:
The first step, is added in agitator tank 2 in proportion by coating oleo stock and water, starts the agitating device 21 on agitator tank 2, starts front pump 5, after being stirred by lotion by lotion in input channel 5 is conveyed into dipping unit 9；
Second step, after the liquid level in dipping unit 9 is answered and met the height and position of submergence workpiece, closes front pump 5, and starts the stirring motor 8B of agitating device one, makes the lotion of dipping unit 9 be constantly in flowing and suspended state；
3rd step, core is immersed in dipping unit, make core need the face of dip-coating submerge in lotion and stop 3 ~ 5 seconds, make coating be substantially adhered to core surface, then take out core, carry out the dip-coating of next core workpiece, when core dip-coating, the loose sand on its surface can drop in coating, owing to loose sand granule is relatively big, gradually precipitates in the lotion of sluggish flow, and through sand liquid separation net 13, be deposited in sedimentation basin 11；Meanwhile, the loose sand that major part precipitates is isolated in sedimentation basin 11 by sand liquid separation net 13；
4th step, through more than one piece core dip-coating, when in sedimentation basin 11 loose sand deposition to sedimentation basin 11 height 3/4ths time, stop dip-coating, stop agitating device 1 stirring, start rear pump 6 and by output channel 7, lotion is delivered in agitator tank 2 from dip-coating district；
5th step, when the lotion liquid level of dip-coating district 9A is less than the height of output channel 7 connector, close rear pump 6, open the sand flash valve 12 of sedimentation basin 11, and upwards open sand liquid separation net 13, the loose sand of deposition in sedimentation basin 11 is discharged and rinsed well, is then shut off sand flash valve 12 and sand liquid separation net 13；
6th step, it is again started up agitating device 21, front pump 5 is opened after being stirred by lotion in agitator tank 2, lotion in agitator tank 2 is inputted dipping unit 9 again, again carry out core dip-coating, so iterative cycles, until lotion reaches Rejection standard, discharges lotion from the waste valve 3 of agitator tank 2.
For being further ensured that the suspended state of lotion, when the agitating device 21 in agitator tank 2 works, the flow rate of liquid in agitator tank 2 is 3-4m/s, and during agitating device 1 work, in dipping unit 9, the flow velocity of liquid is 1-2 m/s.
The first step, is added in agitator tank in proportion by coating oleo stock and water, starts the agitating device two on agitator tank, starts front pump by lotion after being stirred by lotion in input channel is conveyed into dipping unit；
Second step, after the liquid level in dipping unit is answered and met the height and position of submergence workpiece, closes front pump, and starts the stirring motor of agitating device one, makes the lotion of dipping unit is constantly in flowing and suspended state；
3rd step, core is immersed in dipping unit, make core need the face of dip-coating submerge in lotion and stop 3 ~ 5 seconds, make coating be substantially adhered to core surface, then take out core, carry out the dip-coating of next core workpiece, when core dip-coating, the loose sand on its surface can drop in coating, owing to loose sand granule is relatively big, gradually precipitates in the lotion of sluggish flow, and through sand liquid separation net, be deposited in sedimentation basin；Meanwhile, the loose sand that major part precipitates is isolated in sedimentation basin by sand liquid separation net；
4th step, through more than one piece core dip-coating, when in sedimentation basin loose sand deposition to sedimentation basin height 3/4ths time, stop dip-coating, stop agitating device one and stir, start rear pump and by output channel, lotion is delivered in agitator tank from dip-coating district；
5th step, when the lotion liquid level in dip-coating district is less than the height of output channel connector, close rear pump, open the sand flash valve of sedimentation basin, and upwards open sand liquid separation net, the loose sand deposited in sedimentation basin discharged and sedimentation basin and sand liquid separation net are rinsed well in the lump, being then shut off sand flash valve and sand liquid separation net；
6th step, restarts agitating device two, opens front pump after being stirred by the lotion in agitator tank, lotion in agitator tank is inputted again dipping unit, again carries out core dip-coating, such iterative cycles, until lotion reaches Rejection standard, discharge lotion from the waste valve of agitator tank.
Claims (8)
1. one kind prevents the device that in dipping unit, loose sand suspends, including unlimited dipping unit suitable for reading and agitator tank, connect between described dipping unit and agitator tank and have input channel and output channel, on described input channel and it is connected to front pump and rear pump on output channel, it is characterized in that, described dipping unit includes dip-coating district and the stirring area of both sides, dip-coating district, is respectively equipped with agitating device one, is separated by grid between described dip-coating district and stirring area in described stirring area；The bottom in described dip-coating district is provided with the sedimentation basin of bucket shape, and the bottommost of described sedimentation basin is provided with sand flash valve, and the bucket shape of described sedimentation basin is suitable for reading is provided with sand liquid separation net.
The device preventing loose sand in dipping unit from suspending the most according to claim 1, it is characterized in that, the flat shape in described dip-coating district is rectangle, in described stirring area, the position that arranges of agitating device one is symmetrical arranged along the diagonally opposing corner direction in rectangle dip-coating district, and described agitating device one includes extending into the stirring motor arranged on the upside of the stirring blade of subordinate in the liquid level of stirring area and liquid level.
The device preventing loose sand in dipping unit from suspending the most according to claim 1, it is characterised in that the diapire of described stirring area and sand liquid separation net are with high.
The device preventing loose sand in dipping unit from suspending the most according to claim 1, it is characterized in that, described sand liquid separation net is while being connected by hinge is turning with the inwall of dipping unit, the dipping unit inwall that the another side of described sand liquid separation net is corresponding is provided with Support bracket, and the upside of the sand liquid separation net that described Support bracket is corresponding is fixed with draw ring.
The device preventing loose sand in dipping unit from suspending the most according to claim 1, it is characterised in that also being provided with agitating device two in described agitator tank, the bottom of described agitator tank is provided with waste valve.
6. use a dip-coating method for any one device in claim 15, comprise the steps:
The first step, is added in agitator tank in proportion by coating oleo stock and water, starts the agitating device two on agitator tank, starts front pump by lotion after being stirred by lotion in input channel is conveyed into dipping unit；
Second step, after the liquid level in dipping unit is answered and met the height and position of submergence workpiece, closes front pump, and starts the stirring motor of agitating device one, makes the lotion of dipping unit is constantly in flowing and suspended state；
3rd step, core is immersed in dipping unit, make core need the face of dip-coating submerge in lotion and stop 3 ~ 5 seconds, make coating be substantially adhered to core surface, then take out core, carry out the dip-coating of next core workpiece, when core dip-coating, the loose sand on its surface can drop in coating, owing to loose sand granule is relatively big, gradually precipitates in the lotion of sluggish flow, and through sand liquid separation net, be deposited in sedimentation basin；Meanwhile, the loose sand that major part precipitates is isolated in sedimentation basin by sand liquid separation net；
4th step, through more than one piece core dip-coating, when in sedimentation basin loose sand deposition to sedimentation basin height 3/4ths time, stop dip-coating, stop agitating device one and stir, start rear pump and by output channel, lotion is delivered in agitator tank from dip-coating district；
5th step, when the lotion liquid level in dip-coating district is less than the height of output channel connector, close rear pump, open the sand flash valve of sedimentation basin, and upwards open sand liquid separation net, the loose sand deposited in sedimentation basin discharged and sedimentation basin and sand liquid separation net are rinsed well in the lump, being then shut off sand flash valve and sand liquid separation net；
6th step, restarts agitating device two, opens front pump after being stirred by the lotion in agitator tank, lotion in agitator tank is inputted again dipping unit, again carries out core dip-coating, such iterative cycles, until lotion reaches Rejection standard, discharge lotion from the waste valve of agitator tank.
Dip-coating method the most according to claim 6, it is characterised in that in described 5th step, when discharging and rinsing the loose sand in sedimentation basin, the static most loose sand in a moment of lotion in agitator tank is deposited in tank bottoms, opens waste valve and discharges the chiltern of partly precipitated；In 6th step, supplement in proportion after being again started up agitating device two and add coating oleo stock and water, to meet liquid level during dipping unit dip-coating workpiece.
Dip-coating method the most according to claim 6, it is characterised in that when the agitating device two in described agitator tank works, the flow rate of liquid in agitator tank is 3-4m/s, and when described agitating device one works, in dipping unit, the flow velocity of liquid is 1-2 m/s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372471.4A CN105855483B (en) | 2016-05-31 | 2016-05-31 | A kind of device and its dip-coating method for preventing that loose sand suspends in dipping unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372471.4A CN105855483B (en) | 2016-05-31 | 2016-05-31 | A kind of device and its dip-coating method for preventing that loose sand suspends in dipping unit |
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| CN105855483B CN105855483B (en) | 2017-09-26 |
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| CN106513597A (en) * | 2016-09-29 | 2017-03-22 | 宁夏共享模具有限公司 | Water-based paint station for casting industry |
| CN106513245A (en) * | 2016-12-27 | 2017-03-22 | 昆山乐凯锦富光电科技有限公司 | Coating system for production of optical films |
| CN107838386A (en) * | 2017-12-25 | 2018-03-27 | 潍柴动力股份有限公司 | A kind of core dipping unit |
| CN109226697A (en) * | 2018-09-30 | 2019-01-18 | 含山县全兴内燃机配件有限公司 | One kind being used for cylinder cover for diesel engine evaporative pattern dip coating apparatus |
| CN114570594A (en) * | 2022-02-26 | 2022-06-03 | 宁夏共享机床辅机有限公司 | Device for conveying coating |
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| CN203843124U (en) * | 2014-05-27 | 2014-09-24 | 苏州小鹰铸造装备有限公司 | Sand core dip-coating device |
| CN104588598A (en) * | 2015-01-22 | 2015-05-06 | 西峡县众德汽车部件有限公司 | Surface treatment device for sand core of housing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106513597A (en) * | 2016-09-29 | 2017-03-22 | 宁夏共享模具有限公司 | Water-based paint station for casting industry |
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| CN106513245A (en) * | 2016-12-27 | 2017-03-22 | 昆山乐凯锦富光电科技有限公司 | Coating system for production of optical films |
| CN107838386A (en) * | 2017-12-25 | 2018-03-27 | 潍柴动力股份有限公司 | A kind of core dipping unit |
| CN107838386B (en) * | 2017-12-25 | 2019-07-30 | 潍柴动力股份有限公司 | A kind of sand core dipping unit |
| CN109226697A (en) * | 2018-09-30 | 2019-01-18 | 含山县全兴内燃机配件有限公司 | One kind being used for cylinder cover for diesel engine evaporative pattern dip coating apparatus |
| CN114570594A (en) * | 2022-02-26 | 2022-06-03 | 宁夏共享机床辅机有限公司 | Device for conveying coating |
| CN114570594B (en) * | 2022-02-26 | 2023-11-07 | 宁夏共享机床辅机有限公司 | Device for conveying paint |
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| CN105855483B (en) | 2017-09-26 |
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