CN1159374A - Equipment and method for making sand-core - Google Patents
Equipment and method for making sand-core Download PDFInfo
- Publication number
- CN1159374A CN1159374A CN96123401A CN96123401A CN1159374A CN 1159374 A CN1159374 A CN 1159374A CN 96123401 A CN96123401 A CN 96123401A CN 96123401 A CN96123401 A CN 96123401A CN 1159374 A CN1159374 A CN 1159374A
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- China
- Prior art keywords
- air
- core space
- sand
- core
- space
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
- B22C15/24—Compacting by gas pressure or vacuum involving blowing devices in which the mould material is supplied in the form of loose particles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
- B22C9/123—Gas-hardening
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Casting Devices For Molds (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a method of producing high pegree of compaction core. A core cavity 14 is demarcated by closing the metallic molds 13a, 13b by a metallic mold opening/closing means and weighed and gas- hardened molding sand S is charged into a pressurizing chamber. Successively, the pressure in the core cavity is reduced to 2-100 Torr and also, the air is introduced at the pressure increasing speed of 50-600kg/cm<2> /sec from the upper part in the pressure-reduced core cavity 14 and the pressurized force is acted on the upper surface of the gas-hardened molding sand S to increase the filling density. Then, the hardening gas is introduced in the core cavity 14 to harden the gas hardened molding sand S.
Description
The present invention relates to a kind of equipment and method of utilizing air hardening sand to make core.
The method and apparatus of conventional making core is to adopt a kind of mode of air blowing that air hardening sand is added in the core space, introduces this space by the gas that will harden then and makes the core sand sclerosis.For example, Japanese patent gazette No.48-13804 just reports and has revealed a kind of like this device.This device has a core box, and this core box has a top box and a nowel, and the mutual amalgamation of this top box and nowel is to determine a core space between them.This top box is fixedly mounted on the framework, this nowel by a cylinder supports so that nowel can move both vertically so that this nowel can be toward or away from fixing top box.One by inlet duct, blowhead with push away core mechanism institute and form system and be arranged on this core box.This system can flatly slide on framework so that this system contacts with the top of this top box by wheel; Thereby air and sclerosis gas are supplied with this core space.
Yet, because in the equipment of this routine, only come consolidation core sand (molding sand) by the mode of blowing, therefore when using top box with a plurality of nozzles because of the difference of the performance between nozzle causes the part core sand in the core space can not be by consolidation well.
Thereby, must predict how air flows in air blowing process, and a plurality of steam vent for example venting plug must how suitably to be configured in and to be beneficial in the metal mold blow.
In addition, be number and the position optimization that makes breather plug, must carry out surface roughness and the density of some blow tests repeatedly, and must improve metal mold with the core sand of mensuration core product.Thereby finishing a metal mold needs a large amount of time and cost.
The purpose of this invention is to provide equipment and method that a kind of making has highdensity core, this equipment and method are used a certain amount of breather plug and are reduced and make a time that metal mold spent and a cost.
For achieving the above object, on the one hand, the inventive method that is used for making a core comprises the following steps: air hardening sand is added the core space, and the pressure in core space is reduced to the 2-100 torr, from top so that the pressure in core space increases 50-600kg/cm
2The such speed of/sec is introduced this core space with air stream, thereby for the upper surface of air hardening sand provides pressure to obtain a high density, and the gas that will harden introduces the core space so that the core sand sclerosis.
Equipment of the present invention is a type of Japanese patent gazette dew that No.48-13804 reports, in equipment of the present invention, a vacuum extractor that is used for reducing the pressure in core space is arranged.On the one hand this equipment comprises blowhead, pressure chamber and the half mould device with vacuum extractor, purge valve, intake valve, sclerosis gas input device and the discharging sclerosis gas of the pressure of determining a core space between this half mould, also comprise to be used for to reduce this core space.
In other respects, apparatus and method of the present invention will be understood by following embodiment and claim.
According to the present invention, air stream is input to the core space that is evacuated suddenly.This air stream applies a surge to the upper surface of core sand, thereby this mode compares with the mode with blast only, and the upper surface of core sand has higher consolidation density.
Fig. 1 is the viewgraph of cross-section of first embodiment of a present device.
Fig. 2 is a viewgraph of cross-section with the first similar embodiment of Fig. 1.
Fig. 3 is the viewgraph of cross-section of second embodiment of a present device.
The embodiment of present device is now described with reference to the accompanying drawings.That illustrated in figures 1 and 2 is first embodiment, and that shown in Figure 3 is second embodiment.
Among Fig. 1, many root posts 2 are installed on the pedestal 1, and framework F is installed in the top of column 2, and a sand hopper 4 that has for sand flashboard 3 is installed on the framework F, and gas introducing apparatus has a valve that is used to inflate 5, a valve 6 and a gas tank 7 that is used for bleed.
Blowhead 10 is installed on the framework of sand hopper 4 belows.This blowhead 10 has one and is used to receive from the air hardening sand S of sand hopper 4 and the hole 8 of compressed air being introduced blowhead 10.Blowhead 10 can flatly move so that this blowhead 10 is connected with charge valve 5 along framework F.
The pressure chamber that assembles links to each other with blowhead 10 with ground, blowhead 10 horizontal intervals configuration pressure chamber 11 and pressure chamber 11, so that can move horizontally along framework under the effect of the cylinder 12 that links to each other with pressure chamber 11 with blowhead.The top of pressure chamber 11 is communicated with intake valve 6, contacts the top seal of the bottom of pressure chamber 11 and metal top box (top case) or metal half mould 13a.Metal top box 13a is installed on the column 2, so that metal top box 13a can move from the position shown in Fig. 2.
A lifting platform T is set between the bottom of column 2.A metal nowel of the top braces of lifting platform T (drag box) or metal half mould 13b.Determining a core space 14 between top box and the nowel or between two half moulves.A plurality of gas hole 13c in top box 13a, have been formed.These gas holes 13c is connected with nozzle 9 in the bottom that is formed on blowhead 10.
A plurality of breather plugs 16 are installed in the passage 15 that is formed among top box 13a and the nowel 13b.Passage 15 with a vavuum pump P or the vacuum extractor 18 that is used for vacuumizing core space 14 be connected.One end of vacuum extractor 18 is connected with the bottom and the top in core space 14 by the bottom of pressure chamber 11, wall and the passage 15 of lifting platform T, and the other end of vacuum extractor 18 then is connected with vavuum pump P by an air bleeding valve 17.Vavuum pump P reduces to the 2-100 torr with the pressure in the core space 14.
In addition, the passage 15 of pressure chamber 11 and top box 13a communicates with device 19 by a valve 22, so that the gas that will harden imports core space 14 from a gas generating unit 19.The passage 15 of nowel 13b is connected with a sclerosis gas discharging apparatus 21 by lifting platform T and valve 23.
The equipment of Fig. 1 is operation like this, and the air hardening sand S that is about to mix at place's (not shown) in advance puts into sand hopper 4.Sand amount in the sand hopper 4 is opened for sand flashboard 3 then more than the required sand amount of once penetrating in core space, and the sand in the sand hopper 4 is input in the blowhead 10.
Under the effect of cylinder 12, the system that is made up of blowhead 10 and pressure chamber 11 laterally moves, and just is positioned at the top (Fig. 2) of half mould and lifting platform T up to blowhead 10.Hole 8 links to each other with the hole 8a of valve 6.
Lifting platform T is being with nowel 13b to move up to nowel 13b and top box 13a amalgamation and is upwards promoting top box 13a then, so that sand-blowing nozzle 9 cooperates with the pore 13c of top box 13a and is communicated with.Lifting platform T locked in this position (what represent among Fig. 3 of second embodiment of the present invention is this state).
Begin blast then.After purge valve 5 is opened, be introduced in the blowhead 10 from the compressed air of gas tank 7.The air and the sand in blowhead 10 that are blown in the blowhead 10 flow into core space 14 by nozzle 9 together, so that sand is assembled in core space 14 and air is discharged by venting plug 16.When determining the position of these venting plugs, only consider their whether reasonably exhausts, and needn't consider whether the degree of packing of core sand is good.
Then, lifting platform T descends and to get back to as shown in Figure 2 initial lower position up to top box 13a, and top box 13a separates with blowhead 10 in this position.Move to as shown in Figure 1 initial position by 10,11 systems that formed.Lifting platform T moves up to the air vent 11a of pressure chamber 11 and cooperates with the pore 13c of top box 13a and be communicated with then.Vacuumize core space 4 by open valve 23, so that the pressure in core space is the 2-100 torr.As mentioned above, can whether reasonably the definite of the position of breather plug 16 only consider their exhausts, needn't consider the degree of packing that obtain.
Then, valve 6 is opened and is made air-flow enter core space 14 suddenly.This air-flow applies a surge to the core sand surface in the core space, makes core sand S obtain good consolidation.This mode is compared with the mode that only adopts blast, has higher reinforced density.
Then, come the sclerosis gas of self-hardening gas input device 20 to be input in the core space 14.This gas makes its sclerosis through core sand S.In case of necessity, carry out purging then.Lifting platform T descends, and the thrust unit 25,25 of upper and lower begins action, so that promote and take out the core that makes.
For gas hardening, the binding agent of air hardening sand is preferably selected waterglass, phenolic resins, polyurethane resin and furane resins or the like for use.The sclerosis gas that is used for this air hardening sand can use as carbon dioxide, TEA gas, sulfur dioxide and methyl formate etc.
When air input pressure chamber, preferably make the interior pressure of chamber by 50-600kg/cm
2The speed of/sec increases.Better speed is 200-400kg/cm
2/ sec.The air of input can be atmospheric surrounding air or compressed air.When using compressed air, the maximum of its pressure is preferably 10kg/cm
2The optimization of pressure depends on the size and dimension of intake valve.
The foregoing description illustrated in figures 1 and 2 only is exemplary.Obviously be to carry out to these embodiment that some are improved to those skilled in the art.For example, though in the equipment of Fig. 1 and Fig. 2, vacuum extractor 18 is to be connected with the upper and lower in core space, also it can be changed into the both sides in core space being connected.In addition, available vertical half mould replaces top box and nowel.Utilize one or more horizontally extending cylinders that this half mould is opened and closure.Blowhead 10 links to each other with pressure chamber 11 in an embodiment, also can adopt another kind of mode, that is, both separate and can move independently of one another.
In addition, utilize the mode of blast that core sand S is added in the core space in the above-described embodiments.This sand mode that supplies can adopt the mode of gravity or vacuum to finish.When in core space 14, using vacuum, core sand is added in the core space owing to the pressure between blowhead 10 and the vacuum is different.So blowhead 10 just plays a part the pressure chamber as pressure chamber 11 in this case.Thereby just can save pressure chamber 11.In addition, purge valve 5 or intake valve 6 also can save.
Fig. 3 represents second embodiment of equipment of the present invention.Here with Fig. 1 and Fig. 2 in the identical mark that occurs represent identical parts.
In Fig. 3, this equipment comprises a framework F who is fixed on the column 2, and this column 2 is installed on the pedestal 1, and this is with illustrated in figures 1 and 2 identical.Have a sand hopper 4 and the air input unit for sand flashboard 3 and be installed on the framework F, this air input unit has an intake valve 6 and a gas tank 7.
A hollow cylindric connector H is arranged on sand hopper 4 belows.This connector H has one and is used for receiving from the hole 8 of the core sand of sand hopper and one and makes air be input to hole 8b among the connector H.Pressure chamber 31 with nozzle 9 is set below connector H.This pressure chamber 31 and connector H are connected as a single entity and integrally move.Hole 8b is opened or close by valve 6.An air chamber 32 links to each other with pressure chamber 31, so that air chamber that assembles and pressure chamber move at the effect lower edge of cylinder 12 framework F.This air chamber 32 is connected with a gas generating unit 19.Thrust unit 25 with propelling pin is arranged in this air chamber.When this air chamber 32 moved on a metal half mould or the top box 13a, this air chamber was connected hermetically with half mould or top box 13a.
A dress sand box B is set at the middle part of connector H.Because this dress sand box B has a turning device R, therefore when turning device overturn, this dress sand box B can fall into the core sand that is mounted in it in the pressure chamber 31.
Survey sand device with belt transport unit is measured the core sand of an injection by operation and the control of controlling this belt transport unit for the opening time of sand flashboard 3.
Parts with illustrated in figures 1 and 2 are identical basically with sclerosis gas input device 20 parts such as grade as lifting platform T for other of this equipment.
The operation of this equipment is such, promptly when opening for sand flashboard 3, falls in the connector H from a certain amount of air hardening core sand S (being equivalent to once penetrate the sand amount) of sand hopper 4.The part core sand is adorned sand box B and is stopped, and all the other core sands accumulate in the bottom of pressure chamber 32, and the lifting platform T that metal nowel or half mould 13b be housed begins to move up to nozzle 9 and inserts among the hole 13c of top box 13a.
Follow flashboard 3 closures, core space 14 is evacuated to the force value of 2-100 torr under the effect of vacuum extractor 18.In this vacuum, the part core sand in the pressure chamber 31 is added in the core space, and these core sands that are added into obtain consolidation (initial degree or initial density) to a certain degree.
These vacuum and the effect repeatedly of air stream are so that core sand obtains further consolidation.Only before last air flowed into, the feasible core sand wherein of dress sand box B upset fell into the bottom of pressure chamber 31.
After last air blowing, air chamber 32 is to be connected half mould with the similar mode of embodiment illustrated in figures 1 and 2.Similarly, core sand is hardened and the core that makes is taken out in the effect of the thrust unit by the upper and lower from half mould.
Claims (15)
1. a method of making core comprises the following steps:
The closed metal half mould is to determine a core space between them;
Air hardening sand is joined in this core space;
This core space is vacuumized, and making its pressure is the 2-100 torr;
With 50-600kg/cm
2The air pressure rate of rise of/sec is introduced an air stream in the core space that is evacuated, thereby provides a pressure to the surface of air hardening sand, to obtain a high reinforced density; And
A kind of sclerosis gas is incorporated in this core space, so that this core sand sclerosis.
2. method according to claim 1 is characterized in that described air hardening sand is to join in the described core space by the mode of blowing.
3. method according to claim 1 is characterized in that described air hardening sand is to join in the described core space by the mode of using vacuum.
4. method according to claim 1, the pressure that it is characterized in that introducing the air in the described core space that is evacuated is atmospheric pressure.
5. method according to claim 1 is characterized in that, the air of introducing the described core space that is evacuated is a compressed air.
6. method according to claim 1 is characterized in that, this method also is included in to be introduced described core space with air stream and a kind of gas that hardens is introduced a step that once more described core space is vacuumized between the step in described core space.
7. one kind by joining air hardening sand by the equipment of making core in the metal top box of a sealing and the determined core of the nowel space, and this equipment comprises:
A blowhead (10) that is used to receive air hardening sand has an air admission hole (8) and has sand-blowing nozzle (9) in the bottom of this blowhead on the top of this blowhead;
One with the top seal of described top box (13a) the movably pressure chamber (11) that contacts, on described top box (13a) top a plurality of holes are arranged;
Be used for vacuum extractor (18) that described core space (14) is vacuumized;
One is used for air is introduced purge valve (5) in the described blowhead;
An intake valve (6) that is used for air is introduced described pressure chamber (11);
Be used for sclerosis gas is introduced the sclerosis gas input device (20) in described core space;
One is used for the sclerosis gas sclerosis gas exhausting device (21) of discharging from described core space; And
The lifting platform (T) that can vertically move described top box and nowel.
8. a utilization is incorporated into one by the equipment of making core in the metal top box of a sealing and the determined core of the nowel space with air hardening sand, this metal top box and nowel are sealed by the metal mold locking device, this metal mold locking device comprises a lifting platform that is arranged between the column, and this equipment comprises:
A blowhead (10) that has an air admission hole (8) at an upper portion thereof and have sand-blowing nozzle (9) in its underpart, this blowhead (10) is used for receiving and air hardening sand is infeeded described core space, and described blowhead (10) can move down and this blowhead (10) is positioned at the below of a sand hopper (4) at a framework (F) that is installed in described column top;
One is used for by described air admission hole (8) air being introduced the purge valve (51) on the described framework (F) of being fixed in the described blowhead;
Be used for device (18) that described core space is vacuumized;
Be used for sclerosis gas is introduced the device (20) in described core space; And
Be used for the device (21) of sclerosis gas from the discharge of described core space.
9. device according to claim 8, it is characterized in that, this device also comprises a pressure chamber (11) that links to each other with described blowhead (10), and this pressure chamber (11) is used for the intake valve (6) that is fixed on the described framework that air is introduced in the described pressure chamber (11) is connected hermetically with one with the top of described metal top box (13a).
10. a method of making core comprises the following steps:
The device that described half mould was closed and opened in utilization comes the closed metal half mould, so that determine a core space in described half mould;
A certain amount of air hardening sand of having measured is fallen into a pressure chamber that is connected with the top in described core space;
Described core space is vacuumized, and making its pressure is the 2-100 torr;
With 50-600kg/cm
2The air pressure rate of rise of/sec is introduced the air one or many in the core space that is evacuated, thereby provides a pressure to the surface of air hardening sand, to obtain a high reinforced density;
And
A kind of sclerosis gas is incorporated in this core space, so that this core sand sclerosis.
11. method according to claim 10 is characterized in that, the air pressure of introducing the described core space that is evacuated is an atmospheric pressure.
12. method according to claim 10 is characterized in that, the air that enters the described core space that is evacuated is a compressed air.
13. method according to claim 10 is characterized in that, described air is introduced by described pressure chamber.
14. method according to claim 10 is characterized in that, this method also is included in to be introduced described core space with air stream and a kind of gas that hardens is introduced a step that once more described core space is vacuumized between the step in described core space.
15. a utilization with air hardening sand be incorporated into a metal half mould in sealing (13a makes the equipment of core in the core space of determining in 13b), this metal half mould (13a is that this equipment comprises by the device sealing of opening and sealing this half mould 13b):
Be used for measuring the determinator of once penetrating the sand amount of described core sand S;
A pressure chamber (31) that is arranged on below the described determinator, this pressure chamber top has an air admission hole (6) and one and connects sand hole (8), and the bottom of this pressure chamber has into sand blasting mouth (9), so that receive and supply with air hardening sand (S);
An air chamber (32) that is connected with the top seal ground of the half mould (13a) of described metal half mould movably, the top of this half mould has a plurality of holes;
Be used for vacuum extractor (18) that described core space is vacuumized;
One is used for air is incorporated into intake valve (6) in the described core space;
Be used for a kind of gas that hardens is incorporated into device (20) in the described core space;
Be used for device (21) that described sclerosis gas is discharged from described core space; And
A lifting platform (T) that is used for vertically moving described half mould.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32366095A JP3322382B2 (en) | 1995-11-17 | 1995-11-17 | Core molding method and apparatus |
| JP323660/95 | 1995-11-17 | ||
| JP061985/96 | 1996-02-23 | ||
| JP8061985A JPH09225583A (en) | 1996-02-23 | 1996-02-23 | Method for molding core and apparatus therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1159374A true CN1159374A (en) | 1997-09-17 |
Family
ID=26403062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96123401A Pending CN1159374A (en) | 1995-11-17 | 1996-11-15 | Equipment and method for making sand-core |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0774311A1 (en) |
| KR (1) | KR970029928A (en) |
| CN (1) | CN1159374A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075965C (en) * | 1998-05-19 | 2001-12-12 | 北京中租铸造模具技术开发公司 | Simple vacuum model producing line |
| CN1292857C (en) * | 2001-09-08 | 2007-01-03 | 曼德尔和贝格尔氢化铝有限公司 | Method and mould shooter for producing mould parts, such as casting cores, for casting moulds used to cast metal melt |
| CN102310166A (en) * | 2011-10-19 | 2012-01-11 | 华东泰克西汽车铸造有限公司 | Production technology of sand core in oil duct of automobile engine block |
| CN103192028A (en) * | 2013-04-22 | 2013-07-10 | 天津凯星科技有限公司 | Riser bush production equipment |
| CN103192032A (en) * | 2013-04-22 | 2013-07-10 | 山东建筑大学 | CO2 negative-pressure blowing and hardening process of water glass sand |
| CN103192031A (en) * | 2013-04-03 | 2013-07-10 | 苏州苏铸成套装备制造有限公司 | Forming method of optimized sand core |
| CN103551519A (en) * | 2013-11-14 | 2014-02-05 | 邵宏 | Manufacturing method of non-drop-sand mud core and spraying device |
| CN103978164A (en) * | 2014-04-25 | 2014-08-13 | 河南省汤阴县华兴机械制造有限公司 | Integrated core manufacturing machine for manufacturing body core of cast housing through side evacuation |
| CN105108067A (en) * | 2015-08-31 | 2015-12-02 | 宁夏共享模具有限公司 | Method for improving sand filling and forming of core shooting die |
| CN106077523A (en) * | 2016-08-24 | 2016-11-09 | 苏州苏铸成套装备制造有限公司 | A kind of evacuation penetrates sand structure |
| CN109396353A (en) * | 2018-12-24 | 2019-03-01 | 沈阳汇亚通铸造材料有限责任公司 | Sodium silicate sand used for casting blows CO2Method for curing |
| CN113333687A (en) * | 2021-05-18 | 2021-09-03 | 苏州明志科技股份有限公司 | Core making method and device of large sand core |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078933B (en) * | 2010-12-24 | 2012-09-26 | 山西华德冶铸有限公司 | Automatic mould assembling device |
| CN102632203A (en) * | 2012-05-07 | 2012-08-15 | 苏州明志科技有限公司 | Core manufacturing method of cold core |
| DE102016123050A1 (en) | 2016-11-29 | 2018-05-30 | HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung | Method for producing cores or molds for metal casting |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4813804B1 (en) | 1968-04-27 | 1973-05-01 | ||
| EP0123756B1 (en) * | 1983-04-27 | 1987-06-16 | Naniwa Products Co, Ltd | Entirely automatic, cold box type machine for molding an integral connecting core |
| JPH0780037B2 (en) * | 1990-02-23 | 1995-08-30 | 株式会社浪速製作所 | Lower mold fixed horizontal split mold making machine |
| DE9315614U1 (en) * | 1993-10-08 | 1993-12-23 | Adolf Hottinger Maschinenbau Gmbh, 68219 Mannheim | Device for filling shot heads |
-
1996
- 1996-11-14 EP EP96118272A patent/EP0774311A1/en not_active Withdrawn
- 1996-11-15 CN CN96123401A patent/CN1159374A/en active Pending
- 1996-11-18 KR KR1019960054788A patent/KR970029928A/en not_active Application Discontinuation
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075965C (en) * | 1998-05-19 | 2001-12-12 | 北京中租铸造模具技术开发公司 | Simple vacuum model producing line |
| CN1292857C (en) * | 2001-09-08 | 2007-01-03 | 曼德尔和贝格尔氢化铝有限公司 | Method and mould shooter for producing mould parts, such as casting cores, for casting moulds used to cast metal melt |
| CN102310166A (en) * | 2011-10-19 | 2012-01-11 | 华东泰克西汽车铸造有限公司 | Production technology of sand core in oil duct of automobile engine block |
| CN102310166B (en) * | 2011-10-19 | 2012-12-26 | 华东泰克西汽车铸造有限公司 | Production technology of sand core in oil duct of automobile engine block |
| CN103192031A (en) * | 2013-04-03 | 2013-07-10 | 苏州苏铸成套装备制造有限公司 | Forming method of optimized sand core |
| WO2014161111A1 (en) * | 2013-04-03 | 2014-10-09 | 苏州苏铸成套装备制造有限公司 | Sand core forming method |
| CN103192028B (en) * | 2013-04-22 | 2015-06-24 | 天津凯星科技有限公司 | Riser bush production equipment |
| CN103192032A (en) * | 2013-04-22 | 2013-07-10 | 山东建筑大学 | CO2 negative-pressure blowing and hardening process of water glass sand |
| CN103192028A (en) * | 2013-04-22 | 2013-07-10 | 天津凯星科技有限公司 | Riser bush production equipment |
| CN103192032B (en) * | 2013-04-22 | 2016-04-06 | 山东建筑大学 | A kind of water-glass sand CO 2negative pressure air blowing hardening process |
| CN103551519A (en) * | 2013-11-14 | 2014-02-05 | 邵宏 | Manufacturing method of non-drop-sand mud core and spraying device |
| CN103978164A (en) * | 2014-04-25 | 2014-08-13 | 河南省汤阴县华兴机械制造有限公司 | Integrated core manufacturing machine for manufacturing body core of cast housing through side evacuation |
| CN105108067B (en) * | 2015-08-31 | 2017-08-25 | 宁夏共享模具有限公司 | It is a kind of to lift the method that explosion core mould fills sand shaping |
| CN105108067A (en) * | 2015-08-31 | 2015-12-02 | 宁夏共享模具有限公司 | Method for improving sand filling and forming of core shooting die |
| CN106077523A (en) * | 2016-08-24 | 2016-11-09 | 苏州苏铸成套装备制造有限公司 | A kind of evacuation penetrates sand structure |
| CN106077523B (en) * | 2016-08-24 | 2018-11-16 | 苏州苏铸成套装备制造有限公司 | One kind, which vacuumizes, penetrates sand structure |
| CN109396353A (en) * | 2018-12-24 | 2019-03-01 | 沈阳汇亚通铸造材料有限责任公司 | Sodium silicate sand used for casting blows CO2Method for curing |
| CN109396353B (en) * | 2018-12-24 | 2020-09-29 | 沈阳汇亚通铸造材料有限责任公司 | CO blowing of sodium silicate sand for casting2Hardening method |
| CN113333687A (en) * | 2021-05-18 | 2021-09-03 | 苏州明志科技股份有限公司 | Core making method and device of large sand core |
| CN113333687B (en) * | 2021-05-18 | 2022-08-09 | 苏州明志科技股份有限公司 | Core making method and device of large sand core |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0774311A1 (en) | 1997-05-21 |
| KR970029928A (en) | 1997-06-26 |
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