CN106670383A - Sand mould used for casting machine tool double-arm vertical column casting and manufacturing method of sand mould - Google Patents
Sand mould used for casting machine tool double-arm vertical column casting and manufacturing method of sand mould Download PDFInfo
- Publication number
- CN106670383A CN106670383A CN201611090944.8A CN201611090944A CN106670383A CN 106670383 A CN106670383 A CN 106670383A CN 201611090944 A CN201611090944 A CN 201611090944A CN 106670383 A CN106670383 A CN 106670383A
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- casting mold
- mold unit
- casting
- arms
- sand
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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
- B22C9/02—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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention provides a sand mould used for casting a machine tool double-arm vertical column casting. The sand mould comprises a first casting mould unit, a second casting mould unit and a third casting mould unit, wherein the first casting mould unit is used for forming the bottom outer outline shape of the machine tool double-arm vertical column casting; the second casting mould unit is used for forming an inner cavity structure, a side wall outer outline and a vertical face outer outline of the machine tool double-arm vertical column casting; the third casting mould unit is used for forming side wall, inclined face and top face outer outline shapes of the machine tool double-arm vertical column casting; the second casting mould unit comprises a left arm moulding part used for moulding a left arm inner cavity structure of the machine tool double-arm vertical column casting, a right arm moulding part used for moulding a right arm inner cavity structure of the machine tool double-arm vertical column casting, a double-arm in-leg moulding part used for moulding a double-arm in-leg inner cavity structure of the machine tool double-arm vertical column casting, and an outer moulding part used for moulding an outer outline structure of the machine tool double-arm vertical column casting. Besides, the invention provides a manufacturing method of the sand mould and an assembling method of the sand mould.
Description
Technical field
The present invention relates to casting technology field, more specifically, is related to the sand mold for casting lathe both arms Pillar Castings
And its manufacture method.
Background technology
Both arms Pillar Castings are applied to horizontal Machining centers, as the main structural components for accepting lathe bed and process tool,
Requirement has good mechanical performance, and dimensional accuracy, internal flaw is required higher.
Both arms pillar construction is as shown in figure 1, along Zhou Duowei inner chambers, main body wall thickness is relatively thin, complex structure.Conventional cast process
Middle difficulty is big, and quality, dimensional accuracy are all difficult to control to.It is mainly reflected in：1st, left side arm 10, the inner chamber of right arm 20 and two-arm
The part of empty crotch 30 3 relatively independent in structure (as shown in Figure 2), therefore in conventional casting techniques, this three part will be designed as
Three pieces of cores independent of each other, need individually lower core, casting process core easily to loosen when core pattern is assembled, cause foundry goods to occur choking
Fiery defect and wall unevenness defect；2nd, core gap consolidation is inadequate during lower core, and molten iron is disorderly gone here and there when filling type, causes casting fin to increase
Greatly, clear up difficulty to increase；3rd, need to make special clamp when core pattern is assembled and carry out dimensional measurement to realize the accurate control of wall thickness,
Operation difficulty is big and size is wayward.
The content of the invention
For problems of the prior art, it is an object of the invention to provide a kind of integrally formed based on 3DP technologies
For casting the sand mold and its manufacture method of lathe both arms Pillar Castings, core quantity, effectively solving are largely reduced
Operation difficulty and many casting flaw of such foundry goods in sand casting.
For achieving the above object, one aspect of the present invention provides a kind of sand mold for casting lathe both arms Pillar Castings,
Including：To the first casting mold unit for forming lathe both arms Pillar Castings bottom external contour shape, to form lathe both arms
Pillar Castings inner-cavity structure, side wall exterior contour, the second casting mold unit of facade exterior contour, to form lathe both arms column
Foundry goods side wall, inclined-plane, the 3rd casting mold unit of top surface outer contoured shape, wherein, the second casting mold unit is included to forming machine
Bed both arms Pillar Castings left arm inner-cavity structure left arm forming part, to forming machine tool both arms Pillar Castings right arm inner-cavity structure
Right arm forming part, to crotch forming part in the both arms of crotch inner-cavity structure in forming machine tool both arms Pillar Castings both arms, to shape
The outside forming part of lathe both arms Pillar Castings exterior contour structure.
According to one embodiment of present invention, the second casting mold unit is relative to the arbitrary of left arm forming part and right arm forming part
Sand mold facade opens up the sand cleaning hole through outside forming part, and is designed with the viscous core of sand cleaning hole that assembling is combined with the sand cleaning hole,
The structure of sand cleaning hole may be designed to the arbitrary shape such as circular, square, different in nature.The beneficial effect of the design is：Due to the second casting
Type unit is reconfiguring multiple cores, and interior section profile is invisible, there is sand removal dead angle, and sand cleaning hole is designed thereon
Can be clean by inner chamber loose sand thorough cleaning, and in flow coat operation inner-cavity structure can be made all to apply coating.
According to one embodiment of present invention, the first casting mold unit, the second casting mold unit, the 3rd casting mold unit
Be designed with outer side elevation along its length be easy to handling casting mold hang handle.
According to one embodiment of present invention, the top of the first casting mold unit, the top and the bottom of the second casting mold unit, the 3rd casting
The bottom of type unit is designed with the positioning table of assembling positioning, and positioning table is primary and secondary buckle structure, i.e. each casting mold unit is mutual when assembling
The positioning table one for coordinating positioning is provided with positioning convex, and another one is provided with the groove being engaged with positioning convex.
According to one embodiment of present invention, the top design of the 3rd casting mold unit has rising head, sprue, rising head top one
Body is formed with riser buss, and the sprue top is formed with mouth of a river seat.The beneficial effect of the design is：Avoid rising head
Set, mouth of a river seat is separately formed that the technological deficiencies such as dislocation are produced when being positioned on the 3rd casting mold unit.
According to one embodiment of present invention, the centre of each casting mold cell location platform is designed with gripping mechanism and reserves
Hole.
According to another aspect of the present invention, also provide and a kind of the sand mold that above-described embodiment is related to is formed by 3D printing
Method, including：
S1：The threedimensional model for being designed with processing capacity, the lathe both arms Pillar Castings of running and feeding system is set up by computer；
S2：With the threedimensional model in S1 core is carried out as cutter asking difference operation to form casting mold, so that " casting mold inside loose sand can
With thorough cleaning, flow coat operation casting mold internal structure coating can be covered " for principle by casting mold be divided into Part I, second
Point and Part III, wherein Part I is to form the bottom external contour shape of lathe both arms Pillar Castings, Part II
To the inner-cavity structure, side wall exterior contour, the facade exterior contour that form lathe both arms Pillar Castings, Part III is to form
The side wall of lathe both arms Pillar Castings, inclined-plane, the outer contoured shape of top surface, Part II is also devised with clearing up inner chamber and dissipates
The sand cleaning hole of sand；
S3：The threedimensional model input 3D printer of each casting mold unit after by segmentation is printed, and obtains the first casting mold list
First (100), the second casting mold unit (200) and the 3rd casting mold unit (300)；
Present invention also offers a kind of assembly method for assembling the sand mold that above-described embodiment is related to, including：
S1：First casting mold unit (100) is placed on level ground or workbench, by the second casting mold unit (200) water
Placing flat guarantees the positioning table (207) and the first casting mold list of the second casting mold unit (200) on the first casting mold unit (100)
Double buckle between the positioning table of first (100) buckles compacting；
S2：The 3rd casting mold unit (300) and the second casting mold unit (200) are assembled with S1；
S3：Gripping mechanism preformed hole of the clamping screw rod (303) along each casting mold cell location platform centre is run through into insertion,
Casting mold when guaranteeing to pour into a mould after assembling will not misplace because of the active force of molten iron.
The present invention Advantageous Effects be：
1) structure of the second casting mold unit is by left side arm of the prior art, right arm and two-arm sky crotch three independent cores
One is designed at, core pattern equipment step is eliminated, there is no core pattern gap, 1. reduce the core quantity to form inner-cavity structure,
The operation difficulty of casting mold assembling is reduced, production efficiency is improve；2. three part-structures in prior art are avoided because individually
Lower core is positioned loosely, and producing to rock under molten iron active force during cast causes foundry goods the defects such as fire and wall unevenness of choking occur, and carries
High product quality；3. three part-structures in prior art are avoided because individually lower core is so that core pattern gap consolidation not enough, fills
Disorderly string causes the technological deficiency that casting fin increases to molten iron during type；4. eliminate three independent cores in prior art to fill with casting mold
The sizing control of timing, therefore size is more accurate, without making clamp, operates easier.
2) each casting mold unit can effectively prevent each casting mold unit from misplacing when assembling along all Design Orientation platforms, it is ensured that fixed
Level really, reduces fit-up gap.
Description of the drawings
Fig. 1 is the structural representation of the lathe both arms Pillar Castings that the present invention is referred to；
Wherein：1st, left side arm, 2, right arm；3rd, both arms home record；
Fig. 2 is point core schematic diagram that prior art cast technique forms lathe both arms Pillar Castings inner-cavity structure；
Wherein：10th, left side arm inner chamber core, 20, right arm inner chamber core, 30, two-arm sky crotch inner chamber core；
Fig. 3 is the schematic diagram for casting the second casting mold unit of foundry goods shown in Fig. 1；
Fig. 4 is the schematic diagram after being assembled to each casting mold unit according to one embodiment of the invention；
Specific embodiment
Below with reference to accompanying drawing, embodiments of the present invention is described in detail.
As shown in figure 3, An embodiment provides a kind of sand mold for casting lathe both arms Pillar Castings,
It is double to form lathe including the first casting mold unit 100 to form lathe both arms Pillar Castings bottom external contour shape
Arm Pillar Castings inner-cavity structure, side wall exterior contour, the second casting mold unit 200 of facade exterior contour, it is double to form lathe
Arm Pillar Castings side wall, inclined-plane, the 3rd casting mold unit 300 of top surface outer contoured shape.
As shown in figure 3, the second casting mold unit 200 is integrally formed using 3D printing forming technology, structure includes shaping
The left arm forming part 201 of lathe both arms Pillar Castings left arm inner-cavity structure, to forming machine tool both arms Pillar Castings right arm inner chamber
The right arm forming part 202 of structure, to crotch forming part in the both arms of crotch inner-cavity structure in forming machine tool both arms Pillar Castings both arms
203rd, to the outside forming part 204 of forming machine tool both arms Pillar Castings exterior contour structure.The structure of the second casting mold unit will
Left side arm of the prior art, right arm and two-arm sky three independent core designs of crotch eliminate core pattern equipment step in one,
There is no core pattern gap, 1. reduce the core quantity to form inner-cavity structure, reduce the operation difficulty of casting mold assembling, improve
Production efficiency；2. three part-structures in prior art are avoided because individually lower core is positioned loosely, in molten iron active force during cast
Lower generation is rocked and causes foundry goods the defects such as fire and wall unevenness of choking occur, and improves product quality；3. avoid in prior art
Because individually lower core causes core pattern gap consolidation not enough, disorderly string causes the skill that casting fin increases to molten iron to three part-structures when filling type
Art defect；4. sizing control when three independent cores are assembled with casting mold in prior art is eliminated, therefore size is more smart
Really, without making clamp, operate easier.
Referring again to Fig. 3, the second casting mold unit 200 is relative to left arm forming part 201 and arbitrary sand of right arm forming part 202
Type facade opens up the sand cleaning hole through outside forming part 204, and is designed with the viscous core of sand cleaning hole that assembling is combined with the sand cleaning hole
205, the structure of the sand cleaning hole may be designed to the arbitrary shape such as circular, square, different in nature.After core hardening, casting mold unit is cleared up
Loose sand, the loose sand at inner chamber dead angle is thoroughly cleared up by sand cleaning hole, and loose sand is cleaned out, and core proceeds to flow coat operation,
The position of all formation casting structures is all applied into coating, for inner chamber dead angle can apply coating by sand cleaning hole.
Referring again to Fig. 3, the top of the first casting mold unit 100, the top and the bottom of the second casting mold unit 200, described
The bottom of three casting mold units 300 is designed with the positioning table 207 of assembling positioning, and positioning table 207 is primary and secondary buckle structure, i.e. each casting mold
The positioning table one of the positioning that cooperates during unit assembling is provided with positioning convex, and another one is provided with and is engaged with positioning convex
Groove, each casting mold unit is not susceptible to dislocation, accurate positioning, reduction fit-up gap when assembling.
With reference to Fig. 4, the first casting mold unit 100, the second casting mold unit 200, the 3rd casting mold unit 300 are along length
It is designed with the outer side elevation in direction and is easy to the hanging 206 of handling casting mold.
Above through each casting mold unit of applying coating, treat that coating is dried laggard luggage and matches somebody with somebody, for the sand mold of heavier-weight,
Casting mold unit is sling assembling 206 along hanging using crane rope, each casting mold unit must be along primary and secondary positioning table standard during assembling
Standby positioning.
Referring again to Fig. 4, the centre of each casting mold cell location platform 207 is designed with gripping mechanism preformed hole 208.Assembling
After good each casting mold unit, by clamping screw rod along gripping mechanism preformed hole 208 through insertion, it is ensured that the casting mold after assembling during cast is not
Can misplace because of the active force of molten iron.
Referring again to Fig. 4, the top design of the 3rd casting mold unit 300 has rising head, directly pours in one embodiment of the present of invention
Road, rising head top is formed with riser buss 301, and sprue top is formed with mouth of a river seat 302.The present invention may also provide separately
One embodiment, can also be separately formed for riser buss 301 and mouth of a river seat 302, is respectively placed in after the assembling of each casting mold unit
At the rising head and sprue at the top of the 3rd casting mold unit 300.
According to another aspect of the present invention, also provide and a kind of the sand mold that above-described embodiment is related to is formed by 3D printing
Method, including：
S1：The threedimensional model for being designed with processing capacity, the lathe both arms Pillar Castings of running and feeding system is set up by computer；
S2：With the threedimensional model in S1 core is carried out as cutter asking difference operation to form casting mold, so that " casting mold inside loose sand can
With thorough cleaning, flow coat operation casting mold internal structure coating can be covered " for principle by casting mold be divided into Part I, second
Point and Part III, wherein Part I is to form the bottom external contour shape of lathe both arms Pillar Castings, Part II
To the inner-cavity structure, side wall exterior contour, the facade exterior contour that form lathe both arms Pillar Castings, Part III is to form
The side wall of lathe both arms Pillar Castings, inclined-plane, the outer contoured shape of top surface, Part II is also devised with clearing up inner chamber and dissipates
The sand cleaning hole of sand；
S3：The threedimensional model input 3D printer of each casting mold unit after by segmentation is printed, and obtains the first casting mold list
First (100), the second casting mold unit (200) and the 3rd casting mold unit (300)；
Present invention also offers a kind of assembly method for assembling the sand mold that above-described embodiment is related to, including：
S1：First casting mold unit (100) is placed on level ground or workbench, by the second casting mold unit (200) water
Placing flat guarantees the positioning table (207) and the first casting mold list of the second casting mold unit (200) on the first casting mold unit (100)
Double buckle between the positioning table of first (100) buckles compacting；
S2：The 3rd casting mold unit (300) and the second casting mold unit (200) are assembled with S1；
S3：Gripping mechanism preformed hole of the clamping screw rod (303) along each casting mold cell location platform centre is run through into insertion,
Casting mold when guaranteeing to pour into a mould after assembling will not misplace because of the active force of molten iron.
Claims (8)
1. a kind of sand mold for casting lathe both arms Pillar Castings, it is characterised in that include：
To the first casting mold unit (100) for forming lathe both arms Pillar Castings bottom external contour shape, to form lathe
Both arms Pillar Castings inner-cavity structure, side wall exterior contour, the second casting mold unit (200) of facade exterior contour, to form machine
Bed both arms Pillar Castings side wall, inclined-plane, the 3rd casting mold unit (300) of top surface outer contoured shape,
Wherein, the second casting mold unit (200) is integrally formed using 3D printing forming technology, and structure includes shaping described
It is the left arm forming part (201) of lathe both arms Pillar Castings left arm inner-cavity structure, right to shape the lathe both arms Pillar Castings
The right arm forming part (202) of arm inner-cavity structure, to shape the double of crotch inner-cavity structure in the lathe both arms Pillar Castings both arms
Crotch forming part (203), the outside forming part (204) to shape the lathe both arms Pillar Castings exterior contour structure in arm.
2. sand mold according to claim 1, it is characterised in that the second casting mold unit (200) is relative to left arm molding
Arbitrary sand mold facade of portion (201) and right arm forming part (202) opens up the sand cleaning hole through outside forming part (204), and sets
In respect of the viscous core (205) of sand cleaning hole that assembling is combined with the sand cleaning hole.
3. sand mold according to claim 1, it is characterised in that the first casting mold unit (100), the second casting mold list
Be designed with first (200), the 3rd casting mold unit (300) outer side elevation along its length be easy to handling casting mold hang handle
(206)。
4. sand mold according to claim 1, it is characterised in that the top of the first casting mold unit (100), described second
The top and the bottom of casting mold unit (200), the bottom of the 3rd casting mold unit (300) are designed with the positioning table (207) of assembling positioning,
Positioning table (207) is primary and secondary buckle structure.
5. sand mold according to claim 1, it is characterised in that the top design of the 3rd casting mold unit (300) has and emits
Mouth, sprue, the rising head top is formed with riser buss (301), and the sprue top is formed with mouth of a river seat
(302)。
6. sand mold according to claim 4, it is characterised in that the centre of the positioning table (207) is designed with clamping
Device preformed hole (208).
7. it is a kind of by 3D printing formed claim 1-6 described in sand mold method, it is characterised in that include：
S1：The threedimensional model for being designed with processing capacity, the lathe both arms Pillar Castings of running and feeding system is set up by computer；
S2：With the threedimensional model in S1 core is carried out as cutter asking difference operation to form casting mold, so that " casting mold inside loose sand can be with thorough
Bottom is cleared up, and flow coat operation casting mold internal structure coating can cover " be principle by casting mold be divided into Part I, Part II and
Part III, wherein Part I to form the bottom external contour shape of lathe both arms Pillar Castings, Part II to
Inner-cavity structure, side wall exterior contour, the facade exterior contour of lathe both arms Pillar Castings are formed, Part III is to form lathe
The side wall of both arms Pillar Castings, inclined-plane, the outer contoured shape of top surface, Part II is also devised with clearing up inner chamber loose sand
Sand cleaning hole；
S3：The threedimensional model input 3D printer of each casting mold unit after by segmentation is printed, and obtains the first casting mold unit
(100), the second casting mold unit (200) and the 3rd casting mold unit (300).
8. it is a kind of assembling claim 1-6 described in sand mold method, it is characterised in that include：
S1：First casting mold unit (100) is placed on level ground or workbench, the second casting mold unit (200) level is put
Put on the first casting mold unit (100), and guarantee the positioning table (207) and the first casting mold unit of the second casting mold unit (200)
(100) double buckle between positioning table buckles compacting；
S2：The 3rd casting mold unit (300) and the second casting mold unit (200) are assembled with S1；
S3：Gripping mechanism preformed hole of the clamping screw rod (303) along each casting mold cell location platform centre is run through into insertion, it is ensured that
Casting mold after assembling during cast will not misplace because of the active force of molten iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090944.8A CN106670383B (en) | 2016-11-30 | 2016-11-30 | For casting the sand mold and its manufacturing method of lathe both arms Pillar Castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611090944.8A CN106670383B (en) | 2016-11-30 | 2016-11-30 | For casting the sand mold and its manufacturing method of lathe both arms Pillar Castings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106670383A true CN106670383A (en) | 2017-05-17 |
| CN106670383B CN106670383B (en) | 2019-05-21 |
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ID=58866251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611090944.8A Active CN106670383B (en) | 2016-11-30 | 2016-11-30 | For casting the sand mold and its manufacturing method of lathe both arms Pillar Castings |
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| CN (1) | CN106670383B (en) |
Cited By (7)
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| CN108057873A (en) * | 2018-01-26 | 2018-05-22 | 共享智能铸造产业创新中心有限公司 | The process of low pressure casting thin-walled aluminium alloy castings |
| CN108246979A (en) * | 2018-02-28 | 2018-07-06 | 共享智能铸造产业创新中心有限公司 | A kind of casting method of axis class casting |
| CN108296454A (en) * | 2018-01-26 | 2018-07-20 | 共享智能铸造产业创新中心有限公司 | The parting and its parting scheme of impeller class product |
| CN108480560A (en) * | 2018-06-20 | 2018-09-04 | 株洲中航动力精密铸造有限公司 | Cast shape method of adjustment and Wax mold group for adjusting cast shape |
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| CN114799073A (en) * | 2022-05-26 | 2022-07-29 | 共享铸钢有限公司 | Blind riser sand core structure and casting sand core structure |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108057873A (en) * | 2018-01-26 | 2018-05-22 | 共享智能铸造产业创新中心有限公司 | The process of low pressure casting thin-walled aluminium alloy castings |
| CN108296454A (en) * | 2018-01-26 | 2018-07-20 | 共享智能铸造产业创新中心有限公司 | The parting and its parting scheme of impeller class product |
| CN111659876A (en) * | 2018-01-26 | 2020-09-15 | 共享智能铸造产业创新中心有限公司 | Process method for casting thin-wall aluminum alloy casting at low pressure |
| CN111659876B (en) * | 2018-01-26 | 2022-04-19 | 共享智能铸造产业创新中心有限公司 | Process method for casting thin-wall aluminum alloy casting at low pressure |
| CN108246979A (en) * | 2018-02-28 | 2018-07-06 | 共享智能铸造产业创新中心有限公司 | A kind of casting method of axis class casting |
| CN108246979B (en) * | 2018-02-28 | 2020-01-07 | 共享智能铸造产业创新中心有限公司 | Casting method of shaft casting |
| CN108480560A (en) * | 2018-06-20 | 2018-09-04 | 株洲中航动力精密铸造有限公司 | Cast shape method of adjustment and Wax mold group for adjusting cast shape |
| CN108480560B (en) * | 2018-06-20 | 2020-12-18 | 中国航发南方工业有限公司 | Casting shape adjusting method and wax mold die set for adjusting casting shape |
| CN108817316A (en) * | 2018-06-29 | 2018-11-16 | 共享智能铸造产业创新中心有限公司 | A kind of sand mold classifying method of gear box casing casting |
| CN109047657A (en) * | 2018-10-22 | 2018-12-21 | 太仓黑龙智能工业科技有限公司 | A kind of 3 D-printing pressure shell sand mould and its manufacture craft |
| CN114799073A (en) * | 2022-05-26 | 2022-07-29 | 共享铸钢有限公司 | Blind riser sand core structure and casting sand core structure |
| CN114799073B (en) * | 2022-05-26 | 2023-06-13 | 共享铸钢有限公司 | Blind riser sand core structure and casting sand core structure |
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| CN106670383B (en) | 2019-05-21 |
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