CN105397035A - Device for casting cylinder cover - Google Patents
Device for casting cylinder cover Download PDFInfo
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- CN105397035A CN105397035A CN201510710554.5A CN201510710554A CN105397035A CN 105397035 A CN105397035 A CN 105397035A CN 201510710554 A CN201510710554 A CN 201510710554A CN 105397035 A CN105397035 A CN 105397035A
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Abstract
A device for casting a cylinder cover comprises a die. The die comprises a bottom die body, a side die body and a core assembling tool. The core assembling tool comprises core assembling plates and sand cores installed on the core assembling plates. The core assembling plates are in a wedge shape. Cooling channels are formed in the core assembling plates. The bottom die body comprises a bottom die body frame and a bottom die body core. A wedge-shaped groove is formed in the upper portion of the middle of the bottom die body frame. A second venting hole and a second air inlet are formed in the groove wall of the wedge-shaped groove. An installation groove communicated with the wedge-shaped groove is formed in the lower portion of the middle of the bottom die body frame. The bottom die body core is installed in the installation groove. A sealing hatch cover is arranged at the lower end of the bottom die body core. When the core assembling plates and the wedge-shaped groove are assembled, the second air inlet is communicated with the second venting hole through the cooling channels so that an exhaust channel can be formed; an inner cavity of the sealing hatch cover serves as a sealed hatch, one end of a pipe connected with a compressed air source is connected with the sealing hatch cover, and the other end of the pipe is connected to the second air inlet. According to the device for casting the cylinder cover, the temperature gradient difference is formed through a three-stage cooling step, so that stress cracks of a casting are eliminated; the die is distributed in a split mode, online operation is convenient, and casting requirements for cylinder cover scale production can be met.
Description
Technical field
The present invention relates to a kind of device casting cylinder cap.
Background technology
In cylinder cap forming technique, casting method has a lot, and metal mold gravity casting blank, because its dimensionally stable, process are reproducible, be convenient to the features such as organization of production, becomes aluminum alloy cylinder cover casting first-selected.In existing cylinder cap casting process, there are the following problems:
The first, due to the important load bearing component that cylinder cap is engine, after Mechanical processing of casting, good mechanical performance is required; For obtaining fine and smooth tissue, common practice takes bed die and combustion chamber two benches Quench measure, and the large temperature step of Quench intensity is narrow, and after casting solidification shrinks, inside often easily produces fire check or cold crack; Quench intensity little cylinder cap central area temperature is high, and consecutive solidification is difficult to complete within the unit interval, and cast-internal easily forms rarefaction defect; The problems such as oil impregnate, infiltration, oily foam are shown as in cylinder cap use procedure.
The second, cylinder cap inner-cavity structure complexity requires uniform wall thickness, common method puts lower core at bed die, after use dynamic model matched moulds, the mode of matched in clearance locates core, because core combination is interrelated, the reasons such as the distortion of mismatch, core, the floating core of casting, are difficult to ensure core mutual alignment degree, wall thickness, change in size.
Three, traditional cylinder cover waters mold bed die layout the mechanisms such as cooling, exhaust, the material returned, guiding connection, pipeline arrangement, and global design is comparatively complicated, and continuous seepage of reaching the standard grade need adopt standby cross cutting to change, and safeguards that manufacturing expense is high.
Summary of the invention
The object of the invention is the above-mentioned deficiency in order to overcome prior art, and a kind of device casting cylinder cap is provided, form thermograde difference to eliminate casting stress crackle by three stages cooling ladder, mould splits layout, to reach the standard grade convenient operation, the casting demand of cylinder cap large-scale production can be met.
Technical scheme of the present invention is: comprise mould; Described mould comprises bed die, side form, core assembly frock; Core assembly frock comprises core assembly plate, the core be loaded on core assembly plate, and core assembly plate is clapboard, has cooling duct in core assembly plate; Cooling duct is for cooling emendation central layer, and cooling duct is positioned at core bottom and does not communicate with core; Described bed die comprises that bed die is framed, bed die core rod, the framed middle upper portion of bed die is coordinate with core assembly plate the wedge-shaped slot assembled, wedge-shaped slot cell wall place has the steam vent two corresponding with the steam vent one of cooling duct, the air admission hole two corresponding with the air admission hole one of cooling duct, the framed middle lower portion of bed die is the mounting groove be connected with wedge-shaped slot, bed die core rod is loaded in mounting groove, and bed die core rod lower end is provided with airtight hatchcover; When core assembly plate and wedge-shaped slot assemble, air admission hole two is connected with steam vent two through cooling duct formation bleed-off passage, closed cabin cover cavity forms closed in space, and the hollow pipe one end be connected with compressed air gas source is connected with airtight hatchcover, and the hollow pipe other end is connected to air admission hole two.
Described core assembly plate and bed die framed between be provided with two or more guider.
Guider is alignment pin, and core assembly plate is provided with the pilot hole with detent fit.
Also comprise and can locate polylith core assembly plate for rotating core assembly to form the turntable of multiple core assembly frock.
Core assembly plate surrounding has pickup hole, and core is loaded on core assembly plate through core seat.
Air admission hole one and steam vent one are X-direction hole, and pilot hole is Z-direction hole.
Closed cabin cover cavity is connected with air admission hole two through hollow pipe, and hollow pipe inner sleeve has tubule.
Also be provided with the through hole for connecting core and closed cabin cover cavity in core assembly plate, through hole one end is connected with the core pin of core through venting plug, and the through hole other end is connected with closed cabin cover cavity; Through hole is Z-direction hole.
Bed die core rod is fixed with combustion chamber.
Core assembly plate is the metal core assembly plate of QT material.
The invention provides and a kind of on core assembly plate, carry out core combination, by the pickup of core assembly slab integral with water mold bed die and to match device.In cooling, the present invention utilizes the three phases ladder type of cooling, meets casting quality requirement, and during casting, self heat conduction of core assembly plate is cooled to the first ladder; Waste gas negative pressure extracted out imports core assembly plate cooling duct 75 by hollow pipe and cools core assembly frock, and negative-pressure gas is cooled to the second ladder; It is the 3rd ladder that combustion chamber leads to recirculated water water cooling.Thermograde meets casting solidification speed, eliminates casting stress crackle, obtains fine and smooth institutional framework.
In Design of Dies, combustion chamber of the present invention is assemblied in bed die and ensures cylinder cap centre coordinate original point, bed die combustion chamber periphery forms the region of product, comprises the core positioning support part of bed die top assembling, and entirety copies polylith as loose piece taking-up and is adapted as core assembly frock; Polylith core assembly tool locating is in rotation platform, and rotating core assembly can for producing in enormous quantities; Core assembly plate core assembly frock offers four pickup holes, and core assembly completes gets core assembly frock with manipulator and casting die bed die matches, and the pin matched moulds having pin-and-hole and install left and right dynamic model matches, locking core assembly plate; Ejecting mechanism in two steps, ejects base plate and cylinder cap, splitter cylinder lid and bottom plate, cooling maintenance base plate, core assembly circulation.
In core exhaust apparatus, current Cylinder head sand core vent design mostly is negative pressure exhaust; Most of mould negative pressure exhaust apparatus is open being connected with push rod utilize matching board Z-direction to move up and down the material returned, airtight, due to not independently negative pressure closed cabin, there is negative pressure air leakage phenomenon, affects core exhaust effect, affects Internal Quality of Cast; Closed cabin lid and bottom mould core rod uses packing (i.e. asbestos sliver) equipped sealing mutually, and suitable for reading have core assembly plate Z-direction airtight, thus form closed in space; Also be provided with the through hole for connecting core and closed cabin cover cavity in core assembly plate, through hole one end is connected with the core pin of core through venting plug, and the through hole other end is connected with closed cabin cover cavity.The waste gas that negative pressure extracts closed in space out cools to it through the cooling duct of core assembly frock, and then logical recirculated water is lowered the temperature to combustion chamber; Due to bed die split design, make installation independently negative pressure closed cabin become possibility, it is even that closed cabin voltage stabilizing can realize inner pressure constant negative pressure ventilation.
In core location, the core assembly plate portion watered on mold bed die, takes out as loose piece for bed die frame is fixed in combustion chamber by initial point with center, combustion chamber by the present invention, and for combining core, core liquid glue is fixed; Core and the lifting of core assembly slab integral, utilize metal guide to water mold bed die frame and match, utilize pin and pin-and-hole to coordinate and compress core assembly plate, sell and be installed on bottom side form, matched moulds compresses simultaneously, can solve continuous productive process core positioning precision problem.
In cylinder cap large-scale production, the present invention safeguards by copying production limit, polylith core assembly frock limit, and core assembly rotary table recycles, and simplifies the arrangement of casting mold mechanism, has the low maintenance of maintenance cost not stop the advantage of line.
The present invention, according to aluminium alloy forming technique feature, provides a kind of feasible process, and mould splits layout, and convenient operation of reaching the standard grade, can meet the casting of cylinder cap large-scale production.
Feature of the present invention is as follows:
One, platform rotates core assembly, and core under manipulator, casting, pickup, automaticity are high.
Two, casting system Combination Design, is beneficial to the steady stamp of aluminium liquid, is beneficial to gas, oxidation impurities floats.
Three, closed cabin voltage stabilizing mineralization pressure difference is bled, and is beneficial to core exhaust decompression, reduces internal flaw incidence.
Four, three ladder temperature controls, ensure cylinder cap solidification sequence, solve casting crack rarefaction defect, obtain smooth texture.
Five, core assembly frock and casting die combination can be recycled inspection, and every Cooling of Cylinder Head exhaust conditions of guaranteeing to reach the standard grade is consistent.
Six, core assembly and water mold side form resetting relation does not occur, accurate positioning precision is high.
Accompanying drawing explanation
Fig. 1 is turntable schematic diagram.
Fig. 2 is core constitutional diagram.
Fig. 3 is core assembly plate profile.
Fig. 4 is bed die block diagram.
Fig. 5 is framed lower core constitutional diagram.
Fig. 6 is cylinder cap casting system figure.
Fig. 7 is lower core combination dissected figure.
Fig. 8 is core exhaust profile.
Fig. 9 is exhaust part sectioned view.
Figure 10 is the structural representation of venting plug.
Figure 11 is the top view of Figure 10.
Figure 12 is for solidifying pickup figure.
Figure 13 is die structure dwg.
Detailed description of the invention
By following specification concrete structure of the present invention:
One, core assembly (in Fig. 1,2):
Workbench 11 bolt 13 is fixed in rotating shaft 12, is rotated counterclockwise; Core assembly frock uses pin-and-hole 14 to be positioned workbench 11, have pickup hole 19,20,21,22 for manipulator pickup, core assembly plate 15 is provided with core device for positioning and supporting as: water channel sand cores seat 26, exhaust core seat 24, cross gate core seat 25, oil passage sand core seat 23; Through hole 27 is provided with venting plug 62 and waters the airtight hatchcover 55 of mold bed die and be connected, and core assembly plate side offers air-cooled hole (i.e. steam vent one) 28.
Core offers the positioner that convex-concave matches, the corresponding water channel sand cores of water channel sand cores seat 26 29 during core assembly, the corresponding exhaust duct core 30 of exhaust core seat 24, the corresponding cross gate core 31 of cross gate core seat 25, the corresponding oil passage sand core 32 of oil passage sand core seat 23, air inlet core 34 are put above cross gate core 31, large rising head core 33 is put above 32 oil passage sand cores, and core combines complete core print and instills the sizing of liquid Instant cement.
Two, core (in Fig. 3,4,5) under pickup:
Have Cooling Holes 43 in combustion chamber 35 and bed die core rod 39 is fixed in temperature control hole 44, bed die core rod 39 is fixed on bed die framed 60; Shape in core assembly plate 15 after core combination, core assembly plate 15 offers pin-and-hole 14, and water mold bed die core rod 39 and be provided with alignment pin 50, alignment pin 50 and pin-and-hole 14 match; Under pickup, after core, air-cooled hole 28 and steam vent 49 overlap, side form 77 and 78 matched moulds, and pin 76 and hold-down apertures 54 overlap, the stressed locking of core assembly plate 15, and now core assembly plate 15 and bed die core rod 39 and airtight hatchcover 55 are combined to form cavity; Cavity via through holes 27 communicates with top core pin.Airtight hatchcover 55 inner chamber is connected with air admission hole 2 71 through hollow pipe 73, and hollow pipe 73 inner sleeve has tubule 70, and air admission hole 48 is for connecting compressed air.Core combination is complete, and manipulator is by core assembly frock together with core under core pickup, and now core assembly frock steam vent and negative pressure exhaust hole communicate, and sidepiece four pin-and-holes and pin match.
Three, matched moulds cast (in Fig. 6):
Cylinder cap casting system design of the present invention, containing cup, sprue, cast gate neck, filter, cross gate, ingate, scum riser, slag trap, air inlet side side riser, exhaust side side riser, top riser etc.Aluminium liquid pours cup 1 into, and aluminium liquid flows into cast gate neck 3 by sprue 2, and the cast gate throat area aluminium liquid flowing velocity that diminishes slows down; Cup 1 charging rate is greater than cast gate neck 3 flow velocity, and cup is filled with, and the portion gas that aluminium liquid casting impact produces and oxidation impurities start to float; Bottom aluminium liquid continues to flow into sprue 5, is filtered, by filter screen hole coutroi velocity by filter screen 4; The oxidation impurities that the flowing of aluminium liquid produces is pushed into end slag trap 8 and stores, and the oxidizing slag of liquid level rise surface is collected obstruction by scum riser 6, and aluminium liquid continues rising and enters die cavity by ingate 7 shunting; The cavity that Cylinder head sand core is combined to form is by the filling of aluminium liquid institute, aluminium liquid height arrives cover rim face (cover rim face refers to that cylinder cap installs the side in housing direction) foundry goods formative stage and completes, aluminium liquid continues to rise and first arrives air inlet side side riser 9, exhaust side side riser 10, arrive large rising head 11 height aluminium liquid and stop flowing, cylinder cap has been cast.In liquid level uphill process, portion gas, oxidation impurities etc. that aluminium liquid phase produces core high temperature action are poured in top riser by aluminium liquid stationary stream, air inlet side side riser, exhaust side side riser stop.
Four, core vent design (in Fig. 7,8,9,10,11):
Airtight hatchcover 55 has groove, groove is built with packing 65, be connected to form cavity with bolt 64 and bed die core rod 39 to be connected with through hole 27, aperture groove 69 is equipped with venting plug 62, venting plug 62 top has otch 66, and multiple water channel pin 68 is connected with venting plug upper cut 66 respectively by groove 69 with oil duct pin 67; Airtight hatchcover 55, X is connected to being equipped with hollow pipe 73 with air admission hole 2 71, fixes respectively with nut 74; The compressed air entered through air admission hole 48 moves along → X-direction, and discharge from steam vent 2 49, airtight hatchcover 55 cavity forms negative pressure, and the gas in airtight hatchcover 55 cavity moves to X-direction; Venting plug 62 top that through hole 27 is installed has otch 66 and is connected with water channel pin 68 oil duct pin 67, waste gas via through holes 27 is inhaled in closed cabin, through the motion of hollow pipe 73 → direction, enter core assembly plate 15 and discharge after circulating in cooling duct 75, core assembly plate obtains second stage cooling simultaneously;
Liquid level rises, water channel sand cores 29, exhaust duct core 30, air inlet core 34, oil passage sand core 32, the cavity zone 51 that large rising head core 33 is combined to form is filled coated by aluminium liquid, core resin under high temperature action starts gasification, under high temperature action, gas constantly generates, under the effect that aluminium liquid surface tension is airtight with the initial one deck aluminum hull formed, the gas that core produces moves ahead along gap between gravel to low-pressure area 53, under negative pressure ventilation effect, portion gas is sucked by through hole 27, portion gas is by exposed core print 52, open oil passage sand core 32, large rising head core 33 is discharged.
Five, pickup (in Figure 12,13) is solidified:
Cylinder cap coagulation forming conceptual design, containing static head height, cast temperature field distribution, casting rate, mold temperature, paint thickness, cooling, exhaust etc.Time constantly extends, and aluminium liquid liquidus temperature starts to decline, and cylinder cap shows as liquid level at first and shrinks, and rising head liquid level starts to decline; Initial solidification is by the growth of bed die three phases low-temperature space dendrite arm, and the continuous broken assembled growth of dendrite arm under Quench and the effect of pressure head static pressure, successively stereo grid shapedly spreads to rising head direction, solidify; Constant temperature reduces when solidification zone arrives cylinder cap cover rim face height, and the heat of rising head sharply reduces, and rising head high-temperature region under own vol and Action of Gravity Field forms collapse district 56, and rising head surface indentation cylinder cap solidifies feeding to be terminated.Namely cylinder cap solidifies by bottom surface 58, upwards solidifies end to collapse district 56 through cover rim face 57.Slide block 79 is along C+ to opening, B+ is to opening right side mould 77, A+ is to opening left side mould 78, be assemblied in side form bottom surface pin 76 and pin-and-hole 54 is separated from, Lifting Device 59 distribution is made way for around closed cabin, and Lifting Device 59Z is to ejecting core assembly plate 15, and bed die framed 60 is separated with core assembly plate 15 with combustion chamber 35, foundry goods 61 and core assembly plate 15 depart from, manipulator pickup air cooling; Core assembly plate 15 part of watering on mold bed die 80 is taken out as loose piece, for combining core.On bed die 80, the porose and air-cooled hole of core assembly frock matches, and negative pressure exhaust hole and the air-cooled hole of core assembly frock match, and negative pressure ventilation is opened cool cycles and started to carry out, and waste gas is discharged; Bed die and core assembly frock are connected to guide finger location, and side form is provided with pin, side form matched moulds, and pin 76 and pin-and-hole 54 match.
Core assembly plate is moved to inspection workbench and cools by manipulator, inspection cleaning exhaust, cooling vent sealing device; When reach setting 50 ± 5 DEG C return core assembly platform carry out next circulation.
Central layer inspection: venting plug 62 is exited along through hole 27, cleaning venting plug otch 66 carbon distribution; Check exhaust Cooling Holes 28 sealing device; Inspection fills spray bottom surface 63 coating, and cleaning pin 54 pin-and-hole 14, water channel sand cores seat 26, exhaust core seat 24, cross gate core seat 25, oil passage sand core seat 23 coordinate locating surface; Temperature control core assembly plate 50 ± 5 DEG C of transfer cycle.
Claims (10)
1. cast a device for cylinder cap, it is characterized in that: comprise mould; Described mould comprises bed die, side form, core assembly frock;
Core assembly frock comprises core assembly plate (15), the core be loaded on core assembly plate, and core assembly plate (15) is clapboard, has cooling duct (75) in core assembly plate (15);
Described bed die comprises bed die framed (60), bed die core rod (39), bed die framed (60) middle upper portion is coordinate with core assembly plate the wedge-shaped slot assembled, wedge-shaped slot cell wall place has the steam vent two (49) corresponding with the steam vent one (28) of cooling duct (75), the air admission hole two (71) corresponding with the air admission hole one (72) of cooling duct (75), bed die framed (60) middle lower portion is the mounting groove be connected with wedge-shaped slot, bed die core rod (39) is loaded in mounting groove, and bed die core rod (39) lower end is provided with airtight hatchcover (55);
When core assembly plate (15) assembles with wedge-shaped slot, air admission hole two (71) to be connected with steam vent two (49) formation bleed-off passage through cooling duct (75), airtight hatchcover (55) inner chamber forms closed in space, hollow pipe (73) one end be connected with compressed air gas source is connected with airtight hatchcover (55), and hollow pipe (73) other end is connected to air admission hole two (71).
2. the device of casting cylinder cap according to claim 1, is characterized in that: be provided with two or more guider between described core assembly plate (15) and bed die framed (60).
3. the device of casting cylinder cap according to claim 2, is characterized in that: guider is alignment pin (50), and core assembly plate (15) is provided with and the pilot hole of detent fit (14).
4. the device of casting cylinder cap according to claim 1, is characterized in that: also comprise and can locate polylith core assembly plate (15) for rotating core assembly to form the turntable of multiple core assembly frock.
5. the device of casting cylinder cap according to claim 1, is characterized in that: core assembly plate (15) surrounding has pickup hole, and core is loaded on core assembly plate (15) through core seat.
6. the device of casting cylinder cap according to claim 1, is characterized in that: air admission hole one (72) and steam vent one (28) are X-direction hole, and pilot hole (14) is Z-direction hole.
7. the device of casting cylinder cap according to claim 1, is characterized in that: airtight hatchcover (55) inner chamber is connected with air admission hole two (71) through hollow pipe (73), and hollow pipe (73) inner sleeve has tubule (70).
8. the device of casting cylinder cap according to claim 1, it is characterized in that: in core assembly plate (15), be also provided with the through hole (27) for connecting core and airtight hatchcover (55) inner chamber, through hole (27) one end is connected with the core pin of core through venting plug (62), through hole (27) other end and airtight hatchcover (55) intracavity inter-connection; Through hole (27) is Z-direction hole.
9. the device of casting cylinder cap according to claim 1, is characterized in that: bed die core rod is fixed with combustion chamber.
10. the device of casting cylinder cap according to claim 1, is characterized in that: the metal core assembly plate that core assembly plate (15) is QT material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510710554.5A CN105397035B (en) | 2015-10-28 | 2015-10-28 | A kind of device for casting cylinder cap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510710554.5A CN105397035B (en) | 2015-10-28 | 2015-10-28 | A kind of device for casting cylinder cap |
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| CN105397035A true CN105397035A (en) | 2016-03-16 |
| CN105397035B CN105397035B (en) | 2017-12-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111912A (en) * | 2016-08-31 | 2016-11-16 | 广西玉柴机器股份有限公司 | For casting the core group of integrated form Composite cylinder lid |
| CN106141095A (en) * | 2016-08-31 | 2016-11-23 | 广西玉柴机器股份有限公司 | The casting sand core group of integrated form Composite cylinder lid |
| CN107225221A (en) * | 2017-07-21 | 2017-10-03 | 四川省祥业机械铸造有限公司 | A kind of crankcase gap bridge cover plate running gate system |
| CN107377897A (en) * | 2017-09-05 | 2017-11-24 | 福建新佳鑫实业有限公司 | A kind of mould core rotation discharging device of screw air compressor |
| CN108097944A (en) * | 2017-12-30 | 2018-06-01 | 浙江前进暖通科技股份有限公司 | A kind of casting casting assembly line |
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| CN2923109Y (en) * | 2006-07-13 | 2007-07-18 | 广西玉柴机器股份有限公司 | Casting mould of diesel engine cylinder lid |
| CN102179476A (en) * | 2011-03-30 | 2011-09-14 | 潍柴动力股份有限公司 | Core setting technique and core assembly mould used thereof |
| CN104707939A (en) * | 2015-04-08 | 2015-06-17 | 广西玉柴机器股份有限公司 | Cast sand core for cylinder cover of diesel engine |
| CN205085354U (en) * | 2015-10-28 | 2016-03-16 | 湖北长鑫源汽车实业有限公司 | Device of casting cylinder cap |
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2015
- 2015-10-28 CN CN201510710554.5A patent/CN105397035B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2923109Y (en) * | 2006-07-13 | 2007-07-18 | 广西玉柴机器股份有限公司 | Casting mould of diesel engine cylinder lid |
| CN102179476A (en) * | 2011-03-30 | 2011-09-14 | 潍柴动力股份有限公司 | Core setting technique and core assembly mould used thereof |
| CN104707939A (en) * | 2015-04-08 | 2015-06-17 | 广西玉柴机器股份有限公司 | Cast sand core for cylinder cover of diesel engine |
| CN205085354U (en) * | 2015-10-28 | 2016-03-16 | 湖北长鑫源汽车实业有限公司 | Device of casting cylinder cap |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111912A (en) * | 2016-08-31 | 2016-11-16 | 广西玉柴机器股份有限公司 | For casting the core group of integrated form Composite cylinder lid |
| CN106141095A (en) * | 2016-08-31 | 2016-11-23 | 广西玉柴机器股份有限公司 | The casting sand core group of integrated form Composite cylinder lid |
| CN107225221A (en) * | 2017-07-21 | 2017-10-03 | 四川省祥业机械铸造有限公司 | A kind of crankcase gap bridge cover plate running gate system |
| CN107377897A (en) * | 2017-09-05 | 2017-11-24 | 福建新佳鑫实业有限公司 | A kind of mould core rotation discharging device of screw air compressor |
| CN108097944A (en) * | 2017-12-30 | 2018-06-01 | 浙江前进暖通科技股份有限公司 | A kind of casting casting assembly line |
| CN108097944B (en) * | 2017-12-30 | 2024-04-19 | 浙江前进暖通科技股份有限公司 | Foundry goods casting production line |
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| CN105397035B (en) | 2017-12-29 |
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