CN109759563A - A kind of high-pressure fog cooling casting moulding process - Google Patents
A kind of high-pressure fog cooling casting moulding process Download PDFInfo
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Abstract
The present invention relates to automobile parts casting technology fields, disclose a kind of high-pressure fog cooling casting moulding process: molding makes the aluminum liquid filling type in holding furnace to holding furnace using five sections of pressurizations and pressure maintaining；After 230 ± 20s of pressure maintaining, pressure release, 50 ± 10s of natural cooling, die sinking taking-up product.During low-pressure casting, pass through the heat insulation path of upper mold and lower die, so that molten aluminum between cope plate and lower template, upper mold core and lower mold core is kept temperature difference: solidifying the molten aluminum between cope plate and lower template, and the molten aluminum between upper mold core and lower mold core keeps liquid condition, molten aluminum is back to holding furnace when facilitating pressure release, to form wheel cavity between upper mold core and lower mold core, molten aluminum utilization rate is effectively improved.
Description
Technical field
The present invention relates to automobile parts casting technology fields, and in particular to a kind of high-pressure fog cooling casting moulding process.
Background technique
Wheel hub is the component that vehicle is used to connect tire and axis, is usually formed using low-pressure casting.For casting hub
Mold mainly include upper die and lower die, side form and pedestal, the upper die and lower die and side form surround hub type chamber, the lower die and
Side form is fixed on the base.Sprue gate connection in lower die fills the holding furnace of molten aluminum.When low-pressure casting, holding furnace pressurization is made
Molten aluminum enters hub type chamber under stress, pressure maintaining for a period of time, until entire wheel hub is completed and until solidification completely.
There is also some defects for existing wheel hub low pressure casting processes: (1) pressurization fills molten aluminum in existing wheel hub low-pressure casting
After full type chamber, pressure maintaining certain time is opened after the intracavitary molten aluminum of entire hub type solidifies completely, needs after die sinking in product
Heart hole site is processed, and removes the aluminium of central hole location to form centre bore.The molten aluminum that this low-pressure casting expends is more, casting
It causes originally to have to be reduced.(2) when molten aluminum is filled hub type chamber, the intracavitary gas of hub type can not exclude completely, be easy
The defects of making hub surface obtained generate bubble pit, product appearance is seriously affected, or even will affect product strength, generated useless
Product or substandard products.Multiple venting plugs, enhancing exhaust effect are generally uniformly arranged on the ring flange of hub mold centre bore periphery thus
Fruit.But the air inlet and air outlet bore of conventional exhaust plug is identical, and exhausted range is small, it is therefore desirable to multiple venting plugs are installed,
To cause the part of die venting system to increase, the probability of failure is increased；It is in long and narrow column structure inside venting plug, is easy
It results in blockage, it is difficult to clear up.
Above-mentioned technical deficiency how is solved, urgent problem to be solved is become.
Summary of the invention
In order to solve at least one above-mentioned deficiency, the purpose of the present invention is to provide a kind of moldings of high-pressure fog cooling casting
Technique.
The present invention to achieve the above object, takes following technical scheme to be achieved:
A kind of high-pressure fog cooling casting moulding process, the low pressure casting processes are based on following hub mold, the wheel hub
Mold includes upper die and lower die and side form, and the upper die and lower die and side form surround hub type chamber；The upper mold is by upper mold core and upper
Template splicing forms, and the cope plate lower end surface is equipped with criss-cross exhaust line group, the upper mold core lower part and cope plate
Circumference mating surface forms the first vertical annular vent line；Indent and the circumference mating surface of cope plate are formed perpendicular in the middle part of the upper mold core
To annular waste air duct；The upper mold core top outwardly protrudes to form annular ear, the annular ear lower end surface and cope plate
Upper surface connection；Several the radial of the vertical annular waste air duct of conducting are offered between the annular ear and cope plate to be vented
Slot；The circumference mating surface of the lower mold core and lower template is equipped with the second vertical annular vent line；The first and second vertical ring row
The horizontal distance of gas line and hub type intracavitary hub centre bore edges position is 0.5~50mm；The first and second vertical ring row
The position of gas line is inner relative to hub type intracavitary hub centre bore edges position；The hub mold is equipped with cooling device, institute
Stating cooling device includes under the first superradial cooling device, the second superradial cooling device, the first lower disc cooling device, second
Disc cooling device, upper mold inner rim cooling device, side form inner rim cooling device, lower die outer rim cooling device, outside side form
Wheel rim cooling device；
The low pressure casting processes of the automotive hub are specific as follows: molding, to holding furnace using five sections of pressurizations and pressure maintaining, make
Aluminum liquid filling type in holding furnace:
(1) one section of moulding pressure is 200 ± 10mbar, and pressing time is 10 ± 2s；
(2) two sections of moulding pressures are 370 ± 10mbar, and pressing time is 40 ± 2s；
(3) three sections of moulding pressures are 430 ± 10mbar, and pressing time is 45 ± 2s；
(4) four sections of moulding pressures are 600 ± 10mbar, and pressing time is 50 ± 5s；
(5) five sections of moulding pressures are 800 ± 50mbar, and pressing time is 55 ± 5s；After 230 ± 20s of pressure maintaining, pressure release, from
So product is taken out in cooling 50 ± 5s, die sinking；
During above-mentioned low-pressure casting, the control of cooling device water-spraying control is as follows:
The water spray initial time of first superradial cooling device is 180 ± 20s after pressurization, continues 90~120s, then protects
Hold the pulse water cooling for stopping 2s water spray 3s, water flow 100L/min；
The water spray initial time of second superradial cooling device is 120 ± 20s after pressurization, continues 55~75s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of first lower disc cooling device is 260 ± 20s after pressurization, continues 55~85s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of second lower disc cooling device is 150 ± 20s after pressurization, continues 90~130s, then protects
Hold the pulse water cooling for stopping 2s water spray 3s, water flow 100L/min；
The water spray initial time of upper mold inner rim cooling device is 1s after pressurization, continues 45~65s, then keeps stopping 2s spray
The pulse water cooling of water 3s, water flow 100L/min；
The water spray initial time of side form inner rim cooling device is 1s after pressurization, continues 10~15s, then keeps stopping 2s spray
The pulse water cooling of water 3s, water flow 100L/min；
The water spray initial time of lower die outer rim cooling device is 60 ± 10s after pressurization, continues 85~115s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of side form outer rim cooling device is 45 ± 10s after pressurization, continues 120 ± 20s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min.
Preferably, the cooling water temperature in cooling device is room temperature, and cooling water is high-pressure water mist, pressure is preferably 0.6~
1.0MPa。
Preferably, the heat preserving furnace aluminum liquid temperature is 670~685 DEG C.
Preferably, during low-pressure casting, the temperature of aluminum liquid between the upper mold core and lower mold core is controlled 450~550
℃.The first vertical annular vent line, vertical annular waste air duct and radial air discharge duct between upper mold core and cope plate is for arranging
Gas can also be used as heat insulation path；The second vertical annular vent line between lower mold core and lower template is also used for making for being vented
For heat insulation path.Two heat insulation paths can make temperature of aluminum liquid between cope plate and lower template, upper mold core and lower mold core different:
The molten aluminum between cope plate and lower template is solidified, and the molten aluminum between upper mold core and lower mold core keeps liquid condition, conveniently lets out
Molten aluminum is back to holding furnace when pressure, to form wheel cavity between upper mold core and lower mold core, effectively improves molten aluminum utilization rate.
Preferably, the cooling device further includes spreader cooling device, upper mold core cooling device, the cooling dress of lower mold core
It sets.It is suitable when cooled to spreader, upper mold core, lower mold core when needing, it can star the cooling dress of spreader cooling device, upper mold core
It sets, lower mold core cooling device.
Preferably, 15mm, depth 0.8mm, width 0.015 are divided between exhaust line in the criss-cross exhaust line group
~0.07mm；First vertical annular vent line depth is 20mm, and width is 0.015~0.07mm；Indent in the middle part of the upper mold core
1mm, the vertical annular waste air duct depth are 11.7mm, 1.015~1.07mm；The radial direction air discharge duct is five, uniformly
It is distributed in annular ear；Each radial exhaust groove width 20mm, 0.8~1mm of depth；The second vertical annular vent line
Depth is 35mm, and width is 0.015~0.07mm.
Preferably, the upper mold core cooling device, the first superradial cooling device, the second superradial cooling device, upper mold
Inner rim cooling device is the circular course in concentric circles, and every circular course is equipped with several upper mold spray heads.
Preferably, the lower mold core cooling device, the first lower disc cooling device, the second lower disc cooling device, lower die
Outer rim cooling device is the circular course in concentric circles, and every circular course is equipped with several lower die spray heads.
Preferably, the side form is four, is located at front, rear, left, the right of upper and lower mould；In the side form
Wheel rim cooling device includes 3 side form spray heads being disposed side by side on each side form, amounts to 12 side form spray heads；Outside the side form
Wheel rim cooling device includes 4 side form spray heads being disposed side by side on each side form, amounts to 16 side form spray heads.
Preferably, the annular ear lower end surface is bolted with cope plate upper surface.
Preferably, the upper mold upper periphery is equipped with several venting plugs, and the venting plug lower part is uniformly provided with six radial directions
Exhaust line.Radial direction exhaust line depth 20mm.
Compared with prior art, beneficial effects of the present invention are as follows:
The low pressure casting processes of automotive hub of the present invention make a turn center emptying molten aluminum formation using decompression technique is shifted to an earlier date
Chamber effectively improves molten aluminum utilization rate.I.e. by the way that heat insulation path is arranged in upper mold and lower die, make cope plate and lower template, upper mold core
Temperature of aluminum liquid is different between lower mold core: the molten aluminum between cope plate and lower template is solidified, and between upper mold core and lower mold core
Molten aluminum keep liquid condition, molten aluminum is back to holding furnace when facilitating pressure release, thus between upper mold core and lower mold core formed wheel
Cavity effectively improves molten aluminum utilization rate.
New construction is arranged to enhance exhaust effect in the present invention: the criss-cross exhaust line group in cope plate lower end surface, first are erected
To annular vent line, vertical annular waste air duct and radial air discharge duct.When type is filled in pressurization, the criss-cross row in cope plate lower end surface
The gas that hub type is intracavitary that gas line group is capable of large area imports vertical annular vent by the first vertical annular vent line and leads to
Road is discharged using radial air discharge duct, and good exhaust effect, exhausted range is wide, helps to promote product qualification rate, exhaust line can make
Gas can not be passed through by molten aluminum, be easy cleaning.When pressure release, whole gas extraction system can be by the gas induction type outside mold
Chamber makes internal and external pressure balance, lets out holding furnace convenient for aluminum water.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of Machining Automobile Wheel Hub Mould in the present invention；
Fig. 2 is the structural schematic diagram of Machining Automobile Wheel Hub Mould produced by the present invention；
Fig. 3 is the enlarged drawing of position A in Fig. 1；
Fig. 4 is the bottom view of cope plate in the present invention；
Fig. 5 is the sectional view of cope plate in the present invention；
Fig. 6 is the enlarged drawing of position B in Fig. 5；
Fig. 7 is the structural schematic diagram of venting plug in the present invention；
Fig. 8 is sectional view of the Fig. 7 along C-C；
Fig. 9 is the bottom view of upper mold core in the present invention；
Figure 10 is the sectional view of upper mold core in the present invention.
Wherein: 1- side form, 2- hub type chamber, 3- upper mold core, 4- cope plate, 5- exhaust line group, the vertical ring row of 6- first
The vertical annular waste air duct of gas line, 7-, 8- annular ear, 9- radial direction air discharge duct, the sprue gate 10-, 11- automotive hub, the center 12-
Hole, 13- lower mold core, 14- lower template, the vertical annular vent line of 15- second, 16- bolt, 17- venting plug, 18- radial direction exhaust line,
The lower disc cooling device of 19-V type groove, the first superradial of 20- cooling device, the second superradial of 21- cooling device, 22- first,
23- second lower disc cooling device, 24- upper mold inner rim cooling device, 25- side form inner rim cooling device, 26- lower die foreign steamer
Edge cooling device, 27- side form outer rim cooling device, 28- spreader cooling device, 29- upper mold core cooling device, 30- lower die
Core cooling device, 31- spreader.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated.
Referring to Fig. 1-10, low pressure casting processes disclosed by the invention are based on following hub mold, which includes upper
Mould, lower die and side form 1, upper die and lower die and side form 1 surround hub type chamber 2.
Sprue gate 10 in lower die is connected to the holding furnace (not indicating) for filling molten aluminum.When low-pressure casting, pressurize to holding furnace
Molten aluminum is set to enter hub type chamber 2 under stress.Automotive hub 11 is made in pressure release after keeping the temperature a period of time.Referring to fig. 2, automotive wheels
11 centre of hub is center hole 12.
Upper mold is spliced by upper mold core 3 and cope plate 4, and 4 lower end surface of cope plate is equipped with criss-cross exhaust line group 5.
The circumference mating surface of 3 lower part of upper mold core and cope plate 4 forms the first vertical annular vent line 6.3 middle part indent of upper mold core and upper mold
The circumference mating surface of plate 4 forms vertical annular waste air duct 7.3 top of upper mold core outwardly protrudes to form annular ear 8, annular ear
8 lower end surface of portion is connect with 4 upper surface of cope plate.Several vertical annular vents of conducting are offered between annular ear 8 and cope plate 4
The radial air discharge duct 9 in channel 7.The circumference mating surface of lower mold core 13 and lower template 14 is equipped with the second vertical annular vent line 15.The
One, the horizontal distance of two vertical annular vent lines and intracavitary 11 centre bore of wheel hub, 12 marginal position of hub type is 0.5~50mm.The
One, the position of two vertical annular vent lines is inner relative to hub type 12 marginal positions of intracavitary 11 centre bore of wheel hub.
Hub mold is equipped with cooling device, and cooling device includes the first superradial cooling device 20, the cooling of the second superradial
The lower disc cooling device 23 of the lower disc cooling device 22, second of device 21, first, upper mold inner rim cooling device 24, in side form
Wheel rim cooling device 25, lower die outer rim cooling device 26, side form outer rim cooling device 27.
The low pressure casting processes of automotive hub disclosed by the invention are specific as follows: molding, to holding furnace using five sections of pressurizations
And pressure maintaining, make the aluminum liquid filling type in holding furnace:
(1) one section of moulding pressure is 200 ± 10mbar, and pressing time is 10 ± 2s；
(2) two sections of moulding pressures are 370 ± 10mbar, and pressing time is 40 ± 2s；
(3) three sections of moulding pressures are 430 ± 10mbar, and pressing time is 45 ± 2s；
(4) four sections of moulding pressures are 600 ± 10mbar, and pressing time is 50 ± 5s；
(5) five sections of moulding pressures are 800 ± 50mbar, and pressing time is 55 ± 5s；After 230 ± 20s of pressure maintaining, pressure release, from
So product is taken out in cooling 50 ± 5s, die sinking；
During above-mentioned low-pressure casting, the control of cooling device water-spraying control is as follows:
The water spray initial time of first superradial cooling device is 180 ± 20s after pressurization, continues 90~120s, then protects
Hold the pulse water cooling for stopping 2s water spray 3s, water flow 100L/min；
The water spray initial time of second superradial cooling device is 120 ± 20s after pressurization, continues 55~75s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of first lower disc cooling device is 260 ± 20s after pressurization, continues 55~85s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of second lower disc cooling device is 150 ± 20s after pressurization, continues 90~130s, then protects
Hold the pulse water cooling for stopping 2s water spray 3s, water flow 100L/min；
The water spray initial time of upper mold inner rim cooling device is 1s after pressurization, continues 45~65s, then keeps stopping 2s spray
The pulse water cooling of water 3s, water flow 100L/min；
The water spray initial time of side form inner rim cooling device is 1s after pressurization, continues 10~15s, then keeps stopping 2s spray
The pulse water cooling of water 3s, water flow 100L/min；
The water spray initial time of lower die outer rim cooling device is 60 ± 10s after pressurization, continues 85~115s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of side form outer rim cooling device is 45 ± 10s after pressurization, continues 120 ± 20s, then keeps
Stop the pulse water cooling of 2s water spray 3s, water flow 100L/min.
Wherein, the cooling water temperature in cooling device is room temperature, and cooling water is high-pressure water mist, pressure is preferably 0.6~
1.0MPa.Heat preserving furnace aluminum liquid temperature is 670~685 DEG C.Molten aluminum during low-pressure casting, between upper mold core 3 and lower mold core 13
Temperature is controlled at 450~550 DEG C.The first vertical annular vent line 6, vertical annular vent between upper mold core 3 and cope plate 4 is logical
Road 7 and radial air discharge duct 9 can also be used as heat insulation path for being vented；Second between lower mold core 13 and lower template 14 is vertical
Annular vent line 15 is used also as heat insulation path for being vented.Two heat insulation paths, can make cope plate 4 and lower template 14,
Temperature of aluminum liquid is different between upper mold core 3 and lower mold core 13: the molten aluminum between cope plate 4 and lower template 14 is solidified, and upper mold core 3
Molten aluminum between lower mold core 13 keeps liquid condition, and molten aluminum is back to holding furnace when facilitating pressure release, thus in upper mold core 3 under
Wheel cavity is formed between mold core 13, effectively improves molten aluminum utilization rate.
As a preferred solution of the present invention: cooling device can also include spreader cooling device 28, the cooling dress of upper mold core
Set 29, lower mold core cooling device 30.It is suitable when cooled to spreader 31, upper mold core 3, lower mold core 13 when needing, it can star point
Flow cone cooling device 28, upper mold core cooling device 29, lower mold core cooling device 30.Cooling parameter can be set according to the actual situation
It sets.
Referring to fig. 4, it is divided into 15mm in criss-cross exhaust line group 5 between exhaust line, depth 0.8mm, width is 0.015~
0.07mm.Exhaust line in criss-cross exhaust line group 5 is communicated with the first vertical annular vent line 6.First vertical ring row
6 depth of gas line is 20mm, and width is 0.015~0.07mm.3 middle part indent 1mm of upper mold core, the depth of vertical annular waste air duct 7
Degree is 11.7mm, and width is 1.015~1.07mm.Referring to Fig. 9 and Figure 10, radial air discharge duct 9 is five, is evenly distributed on annular
In ear 8；Each radial direction air discharge duct 9 width 20mm, 0.8~1mm of depth.The depth of second vertical annular vent line 15 is
35mm, width are 0.015~0.07mm.
Upper mold core cooling device 29, the first superradial cooling device 20, the second superradial cooling device 21, upper mold inner rim
Cooling device 24 is the circular course in concentric circles, and every circular course is equipped with several upper mold spray heads.
The lower disc cooling device 22, second of lower mold core cooling device 30, first lower disc cooling device 23, lower die outer rim
Cooling device 25 is the circular course in concentric circles, and every circular course is equipped with several lower die spray heads.
Side form 1 is four, is located at front, rear, left, the right of upper and lower mould.Side form inner rim cooling device 25
Including 3 side form spray heads being disposed side by side on each side form, amount to 12 side form spray heads.Side form outer rim cooling device 27 wraps
4 side form spray heads being disposed side by side on each side form are included, 16 side form spray heads are amounted to.
Annular 8 lower end surface of ear is connect with 4 upper surface of cope plate by bolt 16.
Referring to Fig. 1 and Fig. 5, upper mold upper periphery is equipped with several venting plugs 17, and 17 lower part of venting plug is uniformly provided with six diameters
To exhaust line 18, as shown in Figure 7 and Figure 8.18 depth 20mm of the radial direction exhaust line.If as shown in fig. 6,17 lower end of venting plug offers
Dry V-groove 19, V-groove 19 are preferably six, 3mm, deep 0.7mm are spaced between V-groove, V-groove slot bottom is that radius is 0.2mm's
Circular arc.Exhaust line is communicated by cope plate inner sidewall with radial exhaust line 18 in criss-cross exhaust line group 5, and guarantee is handed in length and breadth
Wrong exhaust line group 5 is communicated with venting plug 17.Venting plug 17 is arranged on top, with exhaust line group 5, the first vertical annular vent line
6, vertical annular waste air duct 7 and the radial cooperation of air discharge duct 9 can further enhance exhaust effect.
Compared with prior art, beneficial effects of the present invention are as follows:
The low pressure casting processes of automotive hub of the present invention make a turn center emptying molten aluminum formation using decompression technique is shifted to an earlier date
Chamber effectively improves molten aluminum utilization rate.I.e. by the way that heat insulation path is arranged in upper mold and lower die, make cope plate and lower template, upper mold core
Temperature of aluminum liquid is different between lower mold core: the molten aluminum between cope plate and lower template is solidified, and between upper mold core and lower mold core
Molten aluminum keep liquid condition, molten aluminum is back to holding furnace when facilitating pressure release, thus between upper mold core and lower mold core formed wheel
Cavity effectively improves molten aluminum utilization rate.
New construction is arranged to enhance exhaust effect in the present invention: the criss-cross exhaust line group in cope plate lower end surface, first are erected
To annular vent line, vertical annular waste air duct and radial air discharge duct.When type is filled in pressurization, the criss-cross row in cope plate lower end surface
The gas that hub type is intracavitary that gas line group is capable of large area imports vertical annular vent by the first vertical annular vent line and leads to
Road is discharged using radial air discharge duct, and good exhaust effect, exhausted range is wide, helps to promote product qualification rate, exhaust line can make
Gas can not be passed through by molten aluminum, be easy cleaning.When pressure release, whole gas extraction system can be by the gas induction type outside mold
Chamber makes internal and external pressure balance, lets out holding furnace convenient for aluminum water.
It is provided for the embodiments of the invention technical solution above to be described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention are expounded, the explanation of above embodiments is only applicable to help to understand this
The principle of inventive embodiments；At the same time, for those skilled in the art, according to an embodiment of the present invention, in specific embodiment party
There will be changes in formula and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of high-pressure fog cooling casting moulding process, it is characterised in that:
The low pressure casting processes are based on following hub mold, and the hub mold includes upper die and lower die and side form, it is described on
Mould, lower die and side form surround hub type chamber；The upper mold is spliced by upper mold core and cope plate, and the cope plate lower end surface is set
There are criss-cross exhaust line group, circumference mating surface the first vertical annular vent of formation of the upper mold core lower part and cope plate
Line；Indent and the circumference mating surface of cope plate form vertical annular waste air duct in the middle part of the upper mold core；The upper mold core top
It outwardly protrudes to form annular ear, the annular ear lower end surface is connect with cope plate upper surface；The annular ear and upper mold
The radial air discharge duct of several vertical annular waste air ducts of conducting is offered between plate；The cooperation of the circumference of the lower mold core and lower template
Face is equipped with the second vertical annular vent line；The first and second vertical annular vent line and the intracavitary hub centre bore edges of hub type
The horizontal distance of position is 0.5~50mm；The position of the first and second vertical annular vent line is relative to the intracavitary wheel hub of hub type
Central aperture edge position is inner；The hub mold is equipped with cooling device, and the cooling device includes the cooling dress of the first superradial
It sets, the second superradial cooling device, the first lower disc cooling device, the second lower disc cooling device, the cooling dress of upper mold inner rim
It sets, side form inner rim cooling device, lower die outer rim cooling device, side form outer rim cooling device；
The low pressure casting processes of the automotive hub are specific as follows: molding, to holding furnace using five sections of pressurizations and pressure maintaining, make to keep the temperature
Aluminum liquid filling type in furnace:
(1) one section of moulding pressure is 200 ± 10mbar, and pressing time is 10 ± 2s；
(2) two sections of moulding pressures are 370 ± 10mbar, and pressing time is 40 ± 2s；
(3) three sections of moulding pressures are 430 ± 10mbar, and pressing time is 45 ± 2s；
(4) four sections of moulding pressures are 600 ± 10mbar, and pressing time is 50 ± 5s；
(5) five sections of moulding pressures are 800 ± 50mbar, and pressing time is 55 ± 5s；After 230 ± 20s of pressure maintaining, pressure release is naturally cold
But product is taken out in 50 ± 5s, die sinking；
During above-mentioned low-pressure casting, the control of cooling device water-spraying control is as follows:
The water spray initial time of first superradial cooling device is 180 ± 20s after pressurization, continues 90~120s, then keeps stopping
The pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of second superradial cooling device is 120 ± 20s after pressurization, continues 55~75s, then keeps stopping 2s
The pulse water cooling of water spray 3s, water flow 100L/min；
The water spray initial time of first lower disc cooling device is 260 ± 20s after pressurization, continues 55~85s, then keeps stopping 2s
The pulse water cooling of water spray 3s, water flow 100L/min；
The water spray initial time of second lower disc cooling device is 150 ± 20s after pressurization, continues 90~130s, then keeps stopping
The pulse water cooling of 2s water spray 3s, water flow 100L/min；
The water spray initial time of upper mold inner rim cooling device is 1s after pressurization, continues 45~65s, then keeps stopping 2s water spray 3s
Pulse water cooling, water flow 100L/min；
The water spray initial time of side form inner rim cooling device is 1s after pressurization, continues 10~15s, then keeps stopping 2s water spray 3s
Pulse water cooling, water flow 100L/min；
The water spray initial time of lower die outer rim cooling device is 60 ± 10s after pressurization, continues 85~115s, then keeps stopping 2s
The pulse water cooling of water spray 3s, water flow 100L/min；
The water spray initial time of side form outer rim cooling device is 45 ± 10s after pressurization, continues 120 ± 20s, then keeps stopping 2s
The pulse water cooling of water spray 3s, water flow 100L/min.
2. a kind of high-pressure fog cooling casting moulding process according to claim 1, which is characterized in that the heat preserving furnace aluminum
Liquid temperature is 670~685 DEG C.
3. a kind of high-pressure fog cooling casting moulding process according to claim 1, which is characterized in that low-pressure casting process
In, the temperature of aluminum liquid between the upper mold core and lower mold core is controlled at 450~550 DEG C.
4. a kind of high-pressure fog cooling casting moulding process according to claim 1, which is characterized in that the cooling device
It further include spreader cooling device, upper mold core cooling device, lower mold core cooling device.
5. a kind of high-pressure fog cooling casting moulding process according to claim 1, which is characterized in that described criss-cross
Exhaust line group in 15mm, depth 0.8mm are divided between exhaust line, width is 0.015~0.07mm；First vertical annular vent line
Depth is 20mm, and width is 0.015~0.07mm；Indent 1mm in the middle part of the upper mold core, the vertical annular waste air duct depth
For 11.7mm, 1.015~1.07mm；The radial direction air discharge duct is five, is evenly distributed in annular ear；Each radial exhaust
Groove width 20mm, 0.8~1mm of depth；The depth of the second vertical annular vent line be 35mm, width be 0.015~
0.07mm。
6. a kind of high-pressure fog cooling casting moulding process according to claim 4, which is characterized in that the upper mold core is cold
But device, the first superradial cooling device, the second superradial cooling device, upper mold inner rim cooling device are the circle in concentric circles
Shape water channel, every circular course are equipped with several upper mold spray heads.
7. a kind of high-pressure fog cooling casting moulding process according to claim 4, which is characterized in that the lower mold core is cold
But device, the first lower disc cooling device, the second lower disc cooling device, lower die outer rim cooling device are the circle in concentric circles
Shape water channel, every circular course are equipped with several lower die spray heads.
8. a kind of high-pressure fog cooling casting moulding process according to claim 1, which is characterized in that the side form is four
It is a, it is located at front, rear, left, the right of upper and lower mould；The side form inner rim cooling device includes being disposed side by side on often
3 side form spray heads on a side form amount to 12 side form spray heads；The side form outer rim cooling device includes being disposed side by side on often
4 side form spray heads on a side form amount to 16 side form spray heads.
9. a kind of high-pressure fog cooling casting moulding process according to claim 1, which is characterized in that the annular ear
Lower end surface is bolted with cope plate upper surface.
10. a kind of high-pressure fog cooling casting moulding process according to claim 1, which is characterized in that in the upper mold
End periphery is equipped with several venting plugs, and the venting plug lower part is uniformly provided with six radial exhaust lines.
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