CN106734964A - Casting mold and casting method for casting elongated oil tubing casting - Google Patents
Casting mold and casting method for casting elongated oil tubing casting Download PDFInfo
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- CN106734964A CN106734964A CN201710199069.5A CN201710199069A CN106734964A CN 106734964 A CN106734964 A CN 106734964A CN 201710199069 A CN201710199069 A CN 201710199069A CN 106734964 A CN106734964 A CN 106734964A
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- core
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- sand mold
- casting
- air flue
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
Abstract
A kind of casting mold for casting elongated oil tubing casting,Including upper sand mold,Lower sand mold,Core,Air outlet structure,Fixed structure,The air outlet structure includes being arranged on air flue and air flue in the sand mold being arranged in lower sand mold in the core in core,Air flue is set along the length direction of core in the core,Air flue is set along the length direction of lower sand mold in sand mold,The fixed structure includes ventilation connecting rod,Via of the upper end of ventilation connecting rod through lower sand mold,The mark core bore of core,It is tightly connected with the other end of air flue in core into back-up sand area,The lower end of ventilation connecting rod is tightly connected with one end of air flue in sand mold,In the present invention,Hollow outlet chamber is set to by by the fixed structure,On the premise of the lower core print mold thickness of oil pipe side and lower sand mold is met,Make the outlet of oil pipe core smooth,Fundamentally solve the problems, such as fixation and the outlet of slim-lined construction core,Greatly reduce the casting difficulty of such structural casting.
Description
Technical field
The present invention relates to sand casting technical field, more particularly to a kind of casting mold for casting elongated oil tubing casting and
Casting method.
Background technology
In sand casting process, it is necessary to take into full account fixation and the outlet of core, it is ensured that in group core and casting process
Fuse will not be moved, and the gas of fuse discharge is discharged fully according to the passage of design, so just be can ensure that and is produced
Casting dimension meet correlated quality requirement, meanwhile, casting does not have stomata class defect.Especially to the position for having air-tightness requirement,
Stomata class defect is fatal.
But, for the core of some special constructions, the outlet of core is with fixed often as the maximum difficult point of casting.Than
More typical is the vitta structure in body class product, and it is mainly characterized by oil pipe for slim-lined construction, and in tubing length direction
Side spaced set open blowhole, common opening diameter 40mm.Its casting difficulty shows at following 2 points：
On the one hand, core is fixed：It is slim-lined construction in view of core, to prevent core in group core and the change that bent when pouring into a mould
Shape, it is necessary to the perforate for passing through oil pipe side support, it is fixed, due to Kong Tai little, the core at hole is easy to occur disconnected
Split, scene realizes that difficulty is big.
On the other hand, core outlet is realized by placing nylon air flue, and because core length is long, gas forming amount is big,
Method by setting outlet in core length direction, can have that core outlet is not smooth.If gone out by the hole of 40mm
Gas, due to Kong Tai little, should set core fixed structure in this blowhole, and core air outlet structure is set again, and this is not only grasped
Make difficulty big, even if fixed structure and air outlet structure are placed successfully, back-up sand amount herein is restricted, it is difficult to by core and core
Head position is realized blocking completely, easily gas leakage.
The content of the invention
Being necessary that proposition is a kind of can realize that core is fixed and can realize being cast for casting elongated oil tubing for core outlet
The casting mold of part.
There is a need to a kind of casting method for casting elongated oil tubing casting of proposition.
A kind of casting mold for casting elongated oil tubing casting, including upper sand mold, lower sand mold, core, air outlet structure, fixation
The die cavity of elongated tubing casting is formed after structure, the upper sand mold and lower sand mold and core group core, in the inwall of the lower sand mold
Core print under upper setting, the lower core print is contacted with core, to form blowhole, is set and core insertion in the center of lower core print
Via, back-up sand area, mark core bore are set in core, the back-up sand area, mark core bore, the via of lower sand mold are connected up and down, and together
The heart is coaxially disposed, and the air outlet structure includes being arranged on air flue and gas in the sand mold being arranged in lower sand mold in the core in core
Road, air flue is set along the length direction of core in the core, and air flue is set along the length direction of lower sand mold in sand mold, sand
One end of in-core air flue stretches to sand core internal, and the other end of air flue is extended in back-up sand area in core, and with fixed structure
One end connects, and one end of air flue is connected with the other end of fixed structure in sand mold, and the other end of air flue passes lower sand mold in sand mold
It is connected with the external world, by the gas discharge in core, the fixed structure includes ventilation connecting rod, and the ventilation connecting rod is empty hard
Heart pipe, ventilate connecting rod upper end through lower sand mold via, the mark core bore of core, into back-up sand area with core air flue it is another
End is tightly connected, and the lower end of connecting rod of ventilating is tightly connected with one end of air flue in sand mold.
A kind of casting method for casting elongated oil tubing casting, comprises the following steps：
Upper sand mold moulding：Using sand mold on the Making mold of elongated tubing casting, wherein, opened on the mould of elongated tubing casting
If blowhole；
Lower sand mold moulding：First joint hinge and ventilation connecting rod are welded and fixed, then by air flue noose in lower end and the sand mold of connecting rod of ventilating
It is tightly connected, then air flue in joint hinge, ventilation connecting rod, sand mold is embedded in drag box, keeps the upper end leakage of ventilation connecting rod
In the outside of drag box, for being connected with air flue in core, then the mould of elongated tubing casting is put into drag box, protected
The upper end for holding ventilation connecting rod is stretched out from the blowhole of the mould of elongated tubing casting, afterwards back-up sand consolidation, is risen after after the hardening of lower sand mold
Mould, forms and sets lower core print and the internal lower sand mold for setting air flue in joint hinge, ventilation connecting rod, sand mold；
Coremaking：Air flue in back-up sand area mould, mark core bore mould, core is placed in core box, air flue and back-up sand in core is kept
Area mould overlap joint, keeps mark core bore stent putting in the lower section of back-up sand area mould, afterwards back-up sand consolidation, after after core hardening by sand
Core takes out from core box, obtains opening up back-up sand area and mark core bore and the internal core for setting air flue in core；
Core is assembled：Core is assembled according to positioning, keeps back-up sand area, mark core bore, the upper and lower concentric co-axial of lower core print just right, used
Locking nut tightens ventilation connecting rod, and then core is relatively fixed with lower sand mold, by the upper end and back-up sand area of connecting rod of ventilating
Core in one end noose of air flue be tightly connected so that air flue forms ventilation knot in air flue, ventilation connecting rod, sand mold in core
Structure；
Back-up sand：Core sand is filled up into back-up sand area, is struck off, hardened；
Mould assembling：By upper sand mold and lower sand mold mould assembling, to form the die cavity of elongated tubing casting；
Moulding by casting.
The present invention realizes determining in core assembling process by setting the fixed structure and soft air outlet structure of hard
Position and outlet.
The fixed structure that the present invention is set, on the one hand makes the fixation of slim-lined construction core relatively reliable, on the other hand passes through
The fixed structure is set to hollow outlet chamber, on the premise of the lower core print mold thickness of oil pipe side and lower sand mold is met,
Make the outlet of oil pipe core smooth, fundamentally solve the problems, such as fixation and the outlet of slim-lined construction core, greatly reduce this
The casting difficulty of class formation casting.
Brief description of the drawings
Fig. 1 is the local interior's structural representation for casting the casting mold of elongated oil tubing casting.
Fig. 2 is the partial enlarged drawing of expression fixed structure and air outlet structure in Fig. 1.
Fig. 3 is the structural representation of the fixed structure.
Fig. 4 is by the internal structure schematic diagram after the casting-up.
Fig. 5 is the structural representation of the mould of the elongated tubing casting.
Fig. 6 is the structural representation of the elongated tubing casting.
In figure：Upper sand mold 10, lower sand mold 20, lower core print 21, core 30, back-up sand area 31, mark core bore 32, positive stop lug boss 33,
Air flue 42 in air flue 41, sand mold in air outlet structure 40, core, fixed structure 50, ventilation connecting rod 51, external screw thread 511, joint hinge 52,
Locking nut 53, pad 54, die cavity 60, the mould 70 of elongated tubing casting, blowhole 71, elongated tubing casting 80, blowhole 81.
Specific embodiment
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be attached to what is used needed for embodiment
Figure is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, common for this area
For technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Referring to Fig. 1 to Fig. 3, a kind of casting mold for casting elongated oil tubing casting is the embodiment of the invention provides, including
Upper sand mold 10, lower sand mold 20, core 30, air outlet structure 40, fixed structure 50, upper sand mold 10 and lower sand mold 20 and 30 groups of cores of core
The die cavity 60 of elongated tubing casting 80 is formed afterwards, core print 21, lower core print 21 and core 30 under being set on the inwall of lower sand mold 20
Contact, to form blowhole 81, the via with the insertion of core 30 is set in the center of lower core print 21, is set in core 30 and filled out
Sand area 31, mark core bore 32, back-up sand area 31, mark core bore 32, the via of lower sand mold 20 are connected up and down, and concentric co-axial is set, outlet
Structure 40 includes being arranged on air flue 41 and air flue 42 in the sand mold being arranged in lower sand mold 20 in the core in core 30, in core
Air flue 41 is set along the length direction of core 30, and air flue 42 is set along the length direction of lower sand mold 20 in sand mold, in core
One end of air flue 41 is stretched to inside core 30, and the other end of air flue 41 is extended in back-up sand area 31 in core, and and fixed knot
One end connection of structure 50, one end of air flue 42 is connected with the other end of fixed structure 50 in sand mold, and air flue 42 is another in sand mold
End passes lower sand mold 20 and is connected with the external world, and by the gas discharge in core 30, fixed structure 50 includes ventilation connecting rod 51, ventilation
Connecting rod 51 is hard hollow pipe, the upper end of connecting rod 51 of ventilating through lower sand mold 20 via, the mark core bore 32 of core 30, into filling out
Sand area 31 is tightly connected with the other end of air flue in core 41, and the lower end of connecting rod 51 of ventilating seals with one end of air flue 42 in sand mold
Connection.
In this way, ventilation connecting rod 51 has collectively constituted the air outlet structure of core 30 with air flue 42 in air flue 41, sand mold in core
40, and connecting rod 51 of ventilating, when core 30 is seated on lower core print 21, is especially played for hard hollow pipe is hard hollow pipe
The effect of the fixed core 30 of support.
Further, fixed structure 50 also includes joint hinge 52, locking nut 53, and joint hinge 52, locking nut 53 are separately positioned on
Ventilate the top and bottom of connecting rod 51, with by joint hinge 52, ventilation connecting rod 51, locking nut 53 by core 30 and the lower phase of sand mold 20
To fixation, joint hinge 52 fixes the lower end for being set in ventilation connecting rod 51, the diameter with diameter greater than ventilation connecting rod 51 of joint hinge 52, to increase
The contact area of the molding sand of big joint hinge 52 and the top of joint hinge 52, and then ventilation connecting rod 51 is fixed on by lower sand mold 20 by joint hinge 52
It is interior, external screw thread 511, the diameter of the mark core bore 32 of core 30 are set on the outer wall of the ventilation connecting rod 51 of ventilation connecting rod 51 upper end
Less than the diameter in back-up sand area 31, positive stop lug boss 33 is formed with the top in mark core bore 32, the external diameter of locking nut 53 is more than spacing
The diameter of boss 33, locking nut 53 is connected with the external screw thread 511 of ventilation connecting rod 51, by phase between core 30 and lower sand mold 20
To fixation, the upper end of connecting rod 51 of ventilating is tightly connected with air flue in core 41.
Further, pad 54 is set also between locking nut 53 and positive stop lug boss 33, and the external diameter of pad 54 is more than locking
The external diameter of nut 53.
Locking nut 53, pad 54, positive stop lug boss 33, joint hinge 52 and ventilation connecting rod 51 collectively form fixed structure 50, should
With lower sand mold 20 be relatively fixed core 30 by fixed structure 50, and ventilation connecting rod 51 also functions to support core through lower core print 21
30 effect, and because the sectional area of lower core print 21 is small, it is easy to disconnected core, connecting rod 51 of so ventilating also functions to the arbor of lower core print 21
Effect, enhance the intensity of lower core print 21, it is to avoid resolve core,
So ventilation connecting rod 51 constitutes air outlet structure, fixed structure 50 is also constituted, united two into one, save core 30
The locational space occupied in interior, lower core print 21 so that the abundant consolidation of back-up sand in lower core print 21, occurs without gas leakage.
Referring to Fig. 1, Fig. 4 to Fig. 6, the present invention also proposes a kind of casting method for casting elongated oil tubing casting, wraps
Include following steps：
Upper sand mold moulding：Using the upper sand mold 10 of the manufacture of mould 70 of elongated tubing casting, wherein, in the mould of elongated tubing casting
Blowhole 71 is opened up on 70；The blowhole 71 forms lower core print 21 in lower 20 moulding of sand mold.
Lower sand mold moulding：First by joint hinge 52 and ventilation connecting rod 51 be welded and fixed, then by ventilate connecting rod 51 lower end and sand mold
The noose of interior air flue 42 is tightly connected, and then air flue 42 in joint hinge 52, ventilation connecting rod 51, sand mold is embedded in drag box, is kept
The upper end of ventilation connecting rod 51 leaks outside in the outside of drag box, for being connected with air flue in core 41, then casts elongated tubing
The mould 70 of part is put into drag box, keeps the upper end of ventilation connecting rod 51 to be stretched from the blowhole 71 of the mould 70 of elongated tubing casting
Go out, afterwards back-up sand consolidation, after molding after the hardening of lower sand mold 20, form core print 21 and the internal joint hinge 52, ventilation of setting under setting and connect
The lower sand mold 20 of air flue 42 in bar 51, sand mold；
Coremaking：Air flue 41 in back-up sand area mould, mark core bore mould, core is placed in core box, keep in core air flue 41 with
Back-up sand area mould overlap joint, it is ensured that one end of air flue 41 is drawn from the location hole of the corresponding core box structure in back-up sand area 31 in core, convenient
Air flue 41 and ventilation connecting rod 51 are docked in core, and the other end of air flue 41 is placed on core in core needs the position of outlet, protects
Mark core bore stent putting is held in the lower section of back-up sand area mould, afterwards back-up sand consolidation, after after the hardening of core 30 by core 30 from core box
Middle taking-up, obtains opening up back-up sand area 31 and mark core bore 32 and the internal core 30 for setting air flue 41 in core；
Back-up sand area mould forms back-up sand area 31 in coremaking back-up sand, and mark core bore mould forms mark core bore 32 in coremaking back-up sand, carries
Preceding reserved back-up sand area 31 and mark core bore 32 are for headspace, by air flue in core 41 and ventilation connecting rod 51 in this space
Upper end connect manually, back-up sand strikes off in this back-up sand area 31 again after connection, forms complete core 30.
Core is assembled：Core 30 is assembled according to positioning, keeps back-up sand area 31, mark core bore 32, lower core print concentric about 21
It is coaxial just right, ventilation connecting rod 51 is tightened using locking nut 53, and then core 30 is relatively fixed with lower sand mold 20, will ventilate
One end noose of air flue 41 is tightly connected in core in the upper end of connecting rod 51 and back-up sand area 31, so that air flue 41 in core, logical
Air flue 42 forms ventilation device in gas connecting rod 51, sand mold；
Back-up sand：Core sand is filled up into back-up sand area 31, is struck off, hardened；
Mould assembling：By upper sand mold 10 and the mould assembling of lower sand mold 20, to form the die cavity 60 of elongated tubing casting 80；
Moulding by casting.
Step in present invention method can according to actual needs carry out order adjustment, merge and delete.
Module or unit in embodiment of the present invention device can according to actual needs be merged, divide and deleted.
Above disclosed is only present pre-ferred embodiments, can not limit the right model of the present invention with this certainly
Enclose, one of ordinary skill in the art will appreciate that all or part of flow of above-described embodiment is realized, and will according to right of the present invention
Made equivalent variations are sought, the covered scope of invention is still fallen within.
Claims (4)
1. a kind of casting mold for casting elongated oil tubing casting, it is characterised in that：Including upper sand mold, lower sand mold, core, outlet
The die cavity of elongated tubing casting is formed after structure, fixed structure, the upper sand mold and lower sand mold and core group core, in the lower sand
Lower core print is set on the inwall of type, and the lower core print is contacted with core, to form blowhole, set in the center of lower core print and
The via of core insertion, sets back-up sand area, mark core bore in core, and the back-up sand area, mark core bore, the via of lower sand mold connect up and down
Logical, and concentric co-axial sets, the air outlet structure includes being arranged in the core in core air flue and is arranged in lower sand mold
Air flue in sand mold, in the core air flue along core length direction set, in sand mold air flue along lower sand mold length side
To setting, one end of air flue stretches to sand core internal in core, and the other end of air flue is extended in back-up sand area in core, and with it is solid
One end connection of fixed structure, one end of air flue is connected with the other end of fixed structure in sand mold, and the other end of air flue is worn in sand mold
Go out lower sand mold to be connected with the external world, by the gas discharge in core, the fixed structure includes ventilation connecting rod, the ventilation connecting rod
It is hard hollow pipe, the upper end of connecting rod of ventilating passes through via, the mark core bore of core of lower sand mold, into back-up sand area and gas in core
The other end in road is tightly connected, and the lower end of connecting rod of ventilating is tightly connected with one end of air flue in sand mold.
2. it is used to cast the casting mold of elongated oil tubing casting as claimed in claim 1, it is characterised in that：The fixed structure is also
Including joint hinge, locking nut, joint hinge, locking nut are separately positioned on the top and bottom of ventilation connecting rod, with by joint hinge, ventilation
Be relatively fixed for core and lower sand mold by connecting rod, locking nut, and the joint hinge fixes the lower end for being set in ventilation connecting rod, joint hinge it is straight
Footpath to increase the contact area of the molding sand above joint hinge and joint hinge, and then will be ventilated more than the diameter of ventilation connecting rod by joint hinge
Connecting rod is fixed in lower sand mold, and external screw thread, the core are set on the outer wall of the ventilation connecting rod of the ventilation small end
Mark core bore diameter of the diameter less than back-up sand area, positive stop lug boss is formed with the top in mark core bore, the locking nut it is outer
More than the diameter of the positive stop lug boss, locking nut is connected with the external screw thread of ventilation connecting rod, by between core and lower sand mold in footpath
It is relatively fixed, the upper end of connecting rod of ventilating is tightly connected with air flue in core.
3. it is used to cast the casting mold of elongated oil tubing casting as claimed in claim 2, it is characterised in that：Also locking nut with
Pad, the external diameter of the external diameter more than locking nut of pad are set between positive stop lug boss.
4. a kind of casting method for casting elongated oil tubing casting, it is characterised in that comprise the following steps：
Upper sand mold moulding：Using sand mold on the Making mold of elongated tubing casting, wherein, opened on the mould of elongated tubing casting
If blowhole；
Lower sand mold moulding：First joint hinge and ventilation connecting rod are welded and fixed, then by air flue noose in lower end and the sand mold of connecting rod of ventilating
It is tightly connected, then air flue in joint hinge, ventilation connecting rod, sand mold is embedded in drag box, keeps the upper end leakage of ventilation connecting rod
In the outside of drag box, for being connected with air flue in core, then the mould of elongated tubing casting is put into drag box, protected
The upper end for holding ventilation connecting rod is stretched out from the blowhole of the mould of elongated tubing casting, afterwards back-up sand consolidation, is risen after after the hardening of lower sand mold
Mould, forms and sets lower core print and the internal lower sand mold for setting air flue in joint hinge, ventilation connecting rod, sand mold；
Coremaking：Air flue in back-up sand area mould, mark core bore mould, core is placed in core box, air flue and back-up sand in core is kept
Area mould overlap joint, keeps mark core bore stent putting in the lower section of back-up sand area mould, afterwards back-up sand consolidation, after after core hardening by sand
Core takes out from core box, obtains opening up back-up sand area and mark core bore and the internal core for setting air flue in core；
Core is assembled：Core is assembled according to positioning, keeps back-up sand area, mark core bore, the upper and lower concentric co-axial of lower core print just right, used
Locking nut tightens ventilation connecting rod, and then core is relatively fixed with lower sand mold, by the upper end and back-up sand area of connecting rod of ventilating
Core in one end noose of air flue be tightly connected so that air flue forms ventilation knot in air flue, ventilation connecting rod, sand mold in core
Structure；
Back-up sand：Core sand is filled up into back-up sand area, is struck off, hardened；
Mould assembling：By upper sand mold and lower sand mold mould assembling, to form the die cavity of elongated tubing casting；
Moulding by casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199069.5A CN106734964B (en) | 2017-03-29 | 2017-03-29 | For casting the casting mold and casting method of elongated oil tubing casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199069.5A CN106734964B (en) | 2017-03-29 | 2017-03-29 | For casting the casting mold and casting method of elongated oil tubing casting |
Publications (2)
| Publication Number | Publication Date |
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| CN106734964A true CN106734964A (en) | 2017-05-31 |
| CN106734964B CN106734964B (en) | 2019-01-29 |
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| CN201710199069.5A Active CN106734964B (en) | 2017-03-29 | 2017-03-29 | For casting the casting mold and casting method of elongated oil tubing casting |
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Cited By (10)
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| CN109175235A (en) * | 2018-07-10 | 2019-01-11 | 陕西柴油机重工有限公司 | A kind of fixing means of mud core and the casting method of cabinet, multi-cavity road casting |
| CN109202025A (en) * | 2018-11-13 | 2019-01-15 | 黄山中发耐磨材料有限公司 | Arenaceous shell core pattern casting method |
| CN109954838A (en) * | 2017-12-25 | 2019-07-02 | 科华控股股份有限公司 | A kind of elongated hole forming sand core structure of casting |
| CN110814285A (en) * | 2019-12-16 | 2020-02-21 | 中国重汽集团济南动力有限公司 | Cylinder cover manufacturing mold based on green sand process |
| CN110935847A (en) * | 2019-10-30 | 2020-03-31 | 共享装备股份有限公司 | Positioning tool and positioning method thereof |
| CN112122554A (en) * | 2020-09-30 | 2020-12-25 | 大连金河铸造有限公司 | Positioning method of slender sand core for casting |
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| CN109954838A (en) * | 2017-12-25 | 2019-07-02 | 科华控股股份有限公司 | A kind of elongated hole forming sand core structure of casting |
| CN109175235A (en) * | 2018-07-10 | 2019-01-11 | 陕西柴油机重工有限公司 | A kind of fixing means of mud core and the casting method of cabinet, multi-cavity road casting |
| CN109175235B (en) * | 2018-07-10 | 2021-10-12 | 陕西柴油机重工有限公司 | Fixing method of mud core, box body and casting method of multi-cavity channel casting |
| CN109202025A (en) * | 2018-11-13 | 2019-01-15 | 黄山中发耐磨材料有限公司 | Arenaceous shell core pattern casting method |
| CN110935847A (en) * | 2019-10-30 | 2020-03-31 | 共享装备股份有限公司 | Positioning tool and positioning method thereof |
| CN110814285A (en) * | 2019-12-16 | 2020-02-21 | 中国重汽集团济南动力有限公司 | Cylinder cover manufacturing mold based on green sand process |
| CN112157224A (en) * | 2020-09-30 | 2021-01-01 | 大连金河铸造有限公司 | Sand core structure for elongated hole casting and positioning method |
| CN112122554A (en) * | 2020-09-30 | 2020-12-25 | 大连金河铸造有限公司 | Positioning method of slender sand core for casting |
| CN112157224B (en) * | 2020-09-30 | 2021-12-21 | 大连金河铸造有限公司 | Sand core structure for elongated hole casting and positioning method |
| CN112475244A (en) * | 2020-11-25 | 2021-03-12 | 山东淄博燕峰活塞有限公司 | Forming method for elongated blind hole of casting |
| CN113618025A (en) * | 2021-08-18 | 2021-11-09 | 大连金河铸造有限公司 | Casting sand core positioning device and positioning method thereof |
| CN114406201A (en) * | 2022-01-26 | 2022-04-29 | 阜新力达钢铁铸造有限公司 | Casting method and system for guide rail non-porous upright post |
| CN114406201B (en) * | 2022-01-26 | 2023-11-14 | 阜新力达钢铁铸造有限公司 | Casting method and system for guide rail non-porous upright post |
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