CN109954838A - A kind of elongated hole forming sand core structure of casting - Google Patents
A kind of elongated hole forming sand core structure of casting Download PDFInfo
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- CN109954838A CN109954838A CN201711499884.XA CN201711499884A CN109954838A CN 109954838 A CN109954838 A CN 109954838A CN 201711499884 A CN201711499884 A CN 201711499884A CN 109954838 A CN109954838 A CN 109954838A
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- China
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- sand core
- layer
- steel pipe
- refractory sleeve
- technique steel
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The present invention is a kind of elongated hole forming sand core structure of casting, including end refractory sleeve, transition refractory sleeve, technique steel pipe, casing adhering resin layer, outer layer sand core layer, interior sand core layer and sealed port of butt end layer, transition refractory sleeve is arranged between the refractory sleeve of end, three is butted into hollow refractory sleeve by casing adhering resin layer, technique steel pipe is coaxially disposed in the inner hole of refractory sleeve, air hole is equipped on the tube body of technique steel pipe, outer layer sand core layer is set between technique steel pipe and the inner hole of refractory sleeve, interior sand core layer is equipped in the inner hole of technique steel pipe, sealed port of butt end layer is equipped at the both ends of outer layer sand core layer, outlet passageway is equipped at the center of interior sand core layer.The sand core of the elongated casting hole of this structure can not only eliminate that normal sands wicking surface refractoriness is low, be easy the defect damaged or thrust by high temperature liquid iron scaling loss, burn-through, punching, and can be convenient for shaking out and the recycling of technique steel pipe reuse, and sand using amount is few, and casting cost is low.
Description
Technical field
The invention belongs to casting technology fields, and in particular to a kind of elongated hole forming sand core structure of casting.
Background technique
All design has elongated straight pore structure in many casting, and general for manufacturing the material of type core in Foundry Production
For resin core sand, waterglass core sand, clay core sand, wick sand etc., wherein resin core sand is most widely used.Since type core is being cast
The defects of largely being surrounded by the molten metal of high temperature in type, sepage, scab, stomata, deformation be also easy to produce in casting hole, therefore core
Sand also requires to have higher refractoriness, intensity, rigidity and gas permeability, deformability, defeated and dispersed in addition to the performance that should have general molding sand
Property.
In order to improve refractoriness, intensity, rigidity and the gas permeability of sand core, following two kinds of schemes are mainly taken at present:
The first, chooses internal diameter and casts the elongated consistent seamless steel pipe of bore dia, remove to seamless steel pipe outer surface
Rust is dry or coating is handled, and steel pipe is then put into core box and produces sand core, and fills up resin sand or other fillers in steel pipe
With proof strength, rear steel pipe to be cast will be embedded on casting, thus the elongated hole needed for obtaining.And it is bumped into using seamless steel pipe
When casting is cast, there may be gaps between steel pipe and casting, are not suitable for the high casting of performance requirement, and require steel pipe with
The good welding of molten metal but be not melt melts.But often wall thickness is big at the elongated blowhole of casting, and thermal center is big, and radiating condition is poor, special
It is not that not only steel pipe is melted, and the core sand melt surface in pipe, causes in the prolonged liquid effect of high-temperature liquid metal
Sepage, scab can not clear up in blowhole offset, pipe, and casting is caused to scrap.Furthermore since steel tube surface is dealt with improperly or by dirt
Easily occur gas hole defect when dye, and steel pipe need to derust and dry or coating and can not recycle, it is at high cost.
Second, using resin core sand, inner wall belt venthole steel pipe bone is put into core box, roughing sand is higher using refractoriness
Special sand such as chromite sand, nice foundry sand etc., to guarantee the refractoriness of sand core, intensity, rigidity and gas permeability, and extraordinary former
Sand is expensive, and casting cost is high.
The molding of casting Elongated hole sand core is disclosed in Chinese patent (CN203695877U), provides a kind of sand core degree of packing
Height, the arbor that it includes core box and is coaxially plugged in core box, the arbor are seamless steel pipe,
It is equipped with annular gap between the outside wall surface and core box of arbor, resin sand is filled in annular gap, with resin sand
Corresponding arbor surface is equipped with several ventholes, and in resin sand, the other end is connected in arbor for one end conducting of venthole
Heart hole.
Although the program solves the sand core degree of packing existing in the prior art inadequate, but can not effectively be vented, easily
There is scab and stomata, casting manufacturing cost are difficult to decrease.
Summary of the invention
In order to overcome the shortcomings of the prior art, the present invention provides a kind of elongated hole forming sand core structure of casting, this
The elongated hole forming sand core refractoriness of kind structure is high, and bending strength is high, anti-crushing performance is strong, good permeability, and the casting obtained is thin
The dimensional accuracy of long hole, form accuracy are high, and technique steel pipe is reusable, and Foundry Production is at low cost, can steadily meet large quantities of
Measure Foundry Production requirement.
The technical solution adopted by the present invention is as follows:
A kind of elongated hole forming sand core structure of casting, it is characterized in that: including end refractory sleeve, transition refractory sleeve, work
Skill steel pipe, casing adhering resin layer, outer layer sand core layer, interior sand core layer and sealed port of butt end layer, transition refractory sleeve are arranged in end
Between refractory sleeve, three is butted into hollow refractory sleeve by casing adhering resin layer, same in the inner hole of refractory sleeve
Technique steel pipe is arranged in axis, and air hole is equipped on the tube body of technique steel pipe, is set between technique steel pipe and the inner hole of refractory sleeve
Outer layer sand core layer is set, interior sand core layer is equipped in the inner hole of technique steel pipe, is equipped with sealed port of butt end layer at the both ends of outer layer sand core layer,
Outlet passageway is equipped at the center of interior sand core layer.
Further, air hole is evenly provided on the tube body of technique steel pipe.
Further, the diameter of the air hole is 1~3 millimeter.
Further, the radial thickness of outer layer sand core layer is 5~10 millimeters.
Further, it is docked between end refractory sleeve and transition refractory sleeve by step hole axle fit structure.
Since the present invention uses the brick matter refractory sleeve with excellent fire resistance and excellent air permeability as elongated casting
The sand core outer surface of pore-creating, brick matter refractory sleeve are provided by specialized vendor, and precision is high, and length can arbitrarily determine, brick matter fireproof sleeve
It is lengthened between pipe using docking mode, to meet technique requirement, according to step hole axle docking structure, is able to achieve end fire resisting
Automatic coaxial between casing and transition refractory sleeve docks, and outer layer sand core layer had been arranged both between technique steel pipe and refractory sleeve
The sand core gas permeability of elongated casting hole can be improved, and technique steel pipe can be taken out convenient for shaking out after cast form, it is more conducively subsequent
Refractory sleeve smash removing, on the tube body of technique steel pipe be arranged air hole purpose be to cast when exhaust, in technique
The both ends of the surface of steel pipe and refractory sleeve are equipped with sealed port of butt end layer and prevent in outer layer sand core layer the purpose is to block outer layer sand core layer
Dry sand be lost.The purpose of sand core layer is to further increase entire elongated casting hole sand core in being arranged in the inner hole of technique steel pipe
Intensity, rigidity, interior sand core layer center setting outlet passageway purpose be for the ease of casting when gas concentrate discharge.
It is low that normal sands wicking surface refractoriness can not only be eliminated using the sand core of the elongated casting hole of this structure, be easy high
Warm molten iron scaling loss, burn-through, defect punching damage or thrust, guarantee the shape quality of elongated casting hole, improve the qualification rate of casting, and
And can be reused convenient for shaking out with the recycling of technique steel pipe, compared with prior art, elongated casting hole is carried out using the present invention
Casting, not only dimensional accuracy, form accuracy and hole shape straightness are all higher than the prior art to elongated casting hole obtained, but also
Technique steel pipe and dry sand are all reusable, and sand using amount is few, and casting cost is low.
Detailed description of the invention
Fig. 1 is the first structural schematic diagram of the invention；
Fig. 2 is second of structural schematic diagram of the invention；
Fig. 3 is the third structural schematic diagram of the invention；
In figure: the refractory sleeve of the end 1-；2- transition refractory sleeve；12- entirety refractory sleeve；3- technique steel pipe；4- casing
Adhering resin layer；5- outer layer sand core layer；Sand core layer in 6-；7- sealed port of butt end layer；8- air hole；9- outlet passageway.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing.
Embodiment 1: a kind of casting Elongated hole sand core molding structure, including end refractory sleeve 1, transition refractory sleeve 2, work
Skill steel pipe 3, casing adhering resin layer 4, outer layer sand core layer 5, interior sand core layer 6 and sealed port of butt end layer 7, transition refractory sleeve 2 are arranged
Between end refractory sleeve 1, three is butted into hollow refractory sleeve by casing adhering resin layer 4, and technique steel pipe 3 is arranged
It in the inner hole of refractory sleeve, is coaxially disposed between the two, air hole 8 is evenly provided on the tube body of technique steel pipe 3, it is described
The diameter of stomata 8 is 1~3 millimeter, and outer layer sand core layer 5 is arranged between technique steel pipe 3 and the inner hole of refractory sleeve, outer layer sand core
The radial thickness of layer 5 is 5~10 millimeters, interior sand core layer 6 is equipped in the inner hole of technique steel pipe 3, at the both ends of outer layer sand core layer 5
Face is equipped with sealed port of butt end layer 7, is equipped with outlet passageway 9 at the center of interior sand core layer 6.
Embodiment 2: difference from Example 1 be between end refractory sleeve 1 and transition refractory sleeve 2 to binding
Structure, the step hole axle fit structure realization that the two passes through in this example are coaxial docking.
Embodiment 3: with embodiment 1,2 the difference is that using whole ceramic tube 12, end refractory sleeve 1 and mistake are not necessarily to
Cross refractory sleeve 2 and between docking structure.
Embodiments of the present invention are much not limited to example, as long as using all technical solutions of technical thought of the invention
Belong to protection scope of the present invention.
Claims (5)
1. a kind of elongated hole forming sand core structure of casting, it is characterized in that: including end refractory sleeve (1), transition refractory sleeve
(2), technique steel pipe (3), casing adhering resin layer (4), outer layer sand core layer (5), interior sand core layer (6) and sealed port of butt end layer (7), mistake
It crosses refractory sleeve (2) to be arranged between end refractory sleeve (1), three is butted into hollow by casing adhering resin layer (4)
Refractory sleeve is coaxially disposed technique steel pipe (3) in the inner hole of refractory sleeve, is equipped on the tube body of technique steel pipe (3) ventilative
Hole (8) is equipped with outer layer sand core layer (5), the inner hole in technique steel pipe (3) between technique steel pipe (3) and the inner hole of refractory sleeve
In be equipped with interior sand core layer (6), the both ends of outer layer sand core layer (5) be equipped with sealed port of butt end layer (7), at the center of interior sand core layer (6)
Equipped with outlet passageway (9).
2. the elongated hole forming sand core structure of casting according to claim 1, it is characterized in that: on the tube body of technique steel pipe (3)
It is evenly provided with air hole (8).
3. the elongated hole forming sand core structure of casting according to claim 1 or claim 2, it is characterized in that: the diameter of the air hole (8)
It is 1~3 millimeter.
4. the elongated hole forming sand core structure of casting according to claim 1, it is characterized in that: outer layer sand core layer (5) is radial thick
Degree is 5~10 millimeters.
5. the elongated hole forming sand core structure of casting according to claim 1, it is characterized in that: end refractory sleeve (1) and transition
It is docked between refractory sleeve (2) by step hole axle fit structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499884.XA CN109954838A (en) | 2017-12-25 | 2017-12-25 | A kind of elongated hole forming sand core structure of casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499884.XA CN109954838A (en) | 2017-12-25 | 2017-12-25 | A kind of elongated hole forming sand core structure of casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109954838A true CN109954838A (en) | 2019-07-02 |
Family
ID=67022888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711499884.XA Pending CN109954838A (en) | 2017-12-25 | 2017-12-25 | A kind of elongated hole forming sand core structure of casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846091A (en) * | 2019-11-27 | 2021-05-28 | 尼玛克股份有限公司 | Metal casting with cores |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286983A (en) * | 2000-04-04 | 2001-10-16 | Nishimura Shoten:Kk | Method for manufacturing cast product having fine hole and core for fine hole used to this method |
| CN103752767A (en) * | 2013-12-18 | 2014-04-30 | 桐乡合德机械有限公司 | Shaping structure and manufacturing process of casting elongated hole sand core |
| CN205032646U (en) * | 2015-10-15 | 2016-02-17 | 江苏金动动力机械有限公司 | Long and thin cast hole's of diesel engine camshaft high accuracy shaping psammitolite |
| CN205393465U (en) * | 2016-02-23 | 2016-07-27 | 科华控股股份有限公司 | Foundry goods elongated hole shaping psammitolite structure |
| CN106734964A (en) * | 2017-03-29 | 2017-05-31 | 共享装备股份有限公司 | Casting mold and casting method for casting elongated oil tubing casting |
-
2017
- 2017-12-25 CN CN201711499884.XA patent/CN109954838A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286983A (en) * | 2000-04-04 | 2001-10-16 | Nishimura Shoten:Kk | Method for manufacturing cast product having fine hole and core for fine hole used to this method |
| CN103752767A (en) * | 2013-12-18 | 2014-04-30 | 桐乡合德机械有限公司 | Shaping structure and manufacturing process of casting elongated hole sand core |
| CN205032646U (en) * | 2015-10-15 | 2016-02-17 | 江苏金动动力机械有限公司 | Long and thin cast hole's of diesel engine camshaft high accuracy shaping psammitolite |
| CN205393465U (en) * | 2016-02-23 | 2016-07-27 | 科华控股股份有限公司 | Foundry goods elongated hole shaping psammitolite structure |
| CN106734964A (en) * | 2017-03-29 | 2017-05-31 | 共享装备股份有限公司 | Casting mold and casting method for casting elongated oil tubing casting |
| CN106734964B (en) * | 2017-03-29 | 2019-01-29 | 共享装备股份有限公司 | For casting the casting mold and casting method of elongated oil tubing casting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846091A (en) * | 2019-11-27 | 2021-05-28 | 尼玛克股份有限公司 | Metal casting with cores |
| EP3827911A1 (en) * | 2019-11-27 | 2021-06-02 | Nemak, S.A.B. de C.V. | Metal casting with cores |
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Application publication date: 20190702 |