CN108607949A - A kind of precoated sand and using its without magnetic potassium steel balance weight processing technology - Google Patents
A kind of precoated sand and using its without magnetic potassium steel balance weight processing technology Download PDFInfo
- Publication number
- CN108607949A CN108607949A CN201611126274.0A CN201611126274A CN108607949A CN 108607949 A CN108607949 A CN 108607949A CN 201611126274 A CN201611126274 A CN 201611126274A CN 108607949 A CN108607949 A CN 108607949A
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- CN
- China
- Prior art keywords
- sand
- precoated sand
- balance weight
- precoated
- mold
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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
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- 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
-
- 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
Abstract
The invention discloses a kind of precoated sand and using its without magnetic potassium steel balance weight processing technology, belong to balance weight casting technology field, the precoated sand is mixed and processed for nice foundry sand with thermosetting resin sand, and refractoriness >=1700 DEG C of the nice foundry sand, Oxygen potential >=99%；The balance weight processing technology includes mainly：Make mold, precoated sand makes sand mold, melting is cast and rear process working process.The present invention is that roughing sand processes precoated sand making without magnetic potassium steel balance weight using nice foundry sand, ensure that product surface quality, reduces process, shortens the processing procedure that existing Ludox makes balance weight, cope with customer demand in time；Social resources are saved without using white fused alumina, Mo Laisha, Ludox；90% or more nice foundry sand regeneration rate, reduces the waste of social resources, reduces the pollution of environment；Precoated sand makes sand mold and is not necessarily to drying process, has saved electric energy.
Description
Technical field
The invention belongs to balance weight casting technology fields, and in particular to a kind of precoated sand and putting down without magnetic potassium steel using it
Weigh block processing technology.
Background technology
Balance weight is widely used on the compressor of various refrigeration or heating equipment, is the important spare part on compressor,
It is mainly used for eliminating the imbalance of motor power when rotating at high speed, noise when reducing compressor operating and vibration, balance weight peace
Mounted in two ends of rotor.The part belongs to deep hole thin-wall part, and dimensional accuracy and surface quality requirements are higher, product surface without appoint
What working process, and require without magnetic, this brings very big difficulty to selection and manufacturing process.Past carries out heat using brass
Forging, cost are higher.
In order to reduce cost, no magnetic balance block generally use potassium steel is now made, and cast using Improving Shell Making with Silica Sol
Potassium steel balance weight is produced, process is that Mold Making-wax part making waxy-silicon sol casing-melting casting-shell mold is clear
Except-post-processing, processing procedure is long in present technique, consumptive material is more, environmental pollution is big, and silicon sol casing type is used in processing procedure, does
The dry time is long, wastes electric power resource, in processing procedure using type wax and Ludox, white fused alumina emery dust, not carry out emery dust consumptive material more, pouring
When shell mold is cleared up after casting, useless shell causes environmental pollution.
And cast if being fabricated to sand mold shell using precoated sand, due to the refractoriness of existing Foundry Coated Sand
Low, to be difficult to ensure the surface quality of product, product surface will appear burning into sand, stomata, pin hole, surface shrinkage porosite etc. and lack after casting
It falls into, roughing sand recovery value is not high, results in waste of resources.
Invention content
Processing without magnetic potassium steel balance weight the technical problem to be solved in the present invention is to provide a kind of precoated sand and using it
Technique is improved the ingredient of precoated sand in conjunction with potassium steel balance weight casting condition, makes in potassium steel balance weight process
Process is simplified, and the energy and materials'use amount are few, and used precoated sand regeneration rate is high, environmental pollution is smaller.
To solve the above problems, the present invention adopts the following technical scheme that：
The present invention provides a kind of precoated sand, the precoated sand is mixed and processed for nice foundry sand with thermosetting resin sand, and institute
State refractoriness >=1700 DEG C, Oxygen potential >=99% of nice foundry sand.
Preferably, the granularity of the nice foundry sand is 140-200 mesh, dihedral coefficient≤1.06.
Preferably, the addition of thermosetting resin is the 2%-5% of nice foundry sand quality in the precoated sand.
The present invention also provides a kind of using above-mentioned precoated sand without magnetic potassium steel balance weight processing technology, including walks as follows
Suddenly：
（1）The hot core box mould without magnetic potassium steel balance weight is made according to drawing requirement；
（2）It will（1）Middle mold is installed on core shooter, is installed in place；
（3）The precoated sand is packed into core shooter in hot box, is injected precoated sand in the cavity of the mold using air pressure,
Mold is heated to the thermosetting resin that 200~300 DEG C make in precoated sand to cure, obtains the precoated sand sand mold of curing molding,
The sand mold cavity more than rough casting is made in the precoated sand sand mold；
（4）Casting molten steel is poured into be cooled and shaped in precoated sand sand mold cavity and obtains product blank；
（5）Process processes to obtain finished product after blank is passed through.
Preferably, the step（4）Middle cooling time is 3~5h.
The beneficial effects of the present invention are：After making precoated sand as roughing sand by using nice foundry sand, it is resistance to solve precoated sand
The low problem of fiery degree, ensure that the surface quality of product, and the precoated sand that roughing sand is done using nice foundry sand is made without magnetic potassium steel balance
Block includes mainly making the post-processings such as mold, precoated sand making sand mold, melting casting and the processing of rear process, is made compared to Ludox
Technique shortens the processing procedure for making balance weight, energy saving, reduces and makes the processes such as waxy, shell mold removing, and the precoated sand
Sand mold saves electric energy and drying time without drying process；Nice foundry sand regeneration rate reaches 90% or more in the present invention, section
About resource removes environmental pollution hidden danger, compares Improving Shell Making with Silica Sol, goes back saving wax, white fused alumina emery dust, do not carry out making for emery dust
With having saved resource.Therefore, the present invention processes precoated sand using nice foundry sand as roughing sand and makes without magnetic potassium steel balance weight, reduces
Process shortens the processing procedure that existing Ludox makes balance weight, can cope with customer demand in time；And without using white fused alumina, Mo Lai
Sand, Ludox save social resources；90% or more nice foundry sand regeneration rate, reduces the waste of social resources, reduces environment
Pollution；Precoated sand makes sand mold and is not necessarily to drying process, while having saved electric energy.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to
Specific implementation mode, the present invention is further explained.
Embodiment 1
A kind of no magnetic potassium steel balance weight processing technology comprising following steps：
（1）The hot core box mould without magnetic potassium steel balance weight is made according to drawing requirement；
（2）It will（1）Middle mold is installed on core shooter, is installed in place；
（3）The precoated sand is packed into core shooter in hot box, is injected precoated sand in the cavity of the mold using air pressure,
The precoated sand is that nice foundry sand is mixed and processed with thermosetting resin sand, and wherein the addition of thermosetting resin is mound chiltern
The 2% of amount, and the granularity of the nice foundry sand is 140-200 mesh, dihedral coefficient≤1.06, refractoriness >=1700 DEG C, Oxygen potential >=
99%, mold is heated to the thermosetting resin that 200 DEG C make in precoated sand and is cured, the precoated sand sand mold of curing molding is obtained, in institute
State the sand mold cavity made in precoated sand sand mold more than rough casting；
（4）1580 DEG C of casting molten steel is poured into cooling 3h in precoated sand sand mold cavity to be molded to obtain product blank；
（5）Process processes to obtain finished product after blank is passed through.
Embodiment 2
A kind of no magnetic potassium steel balance weight processing technology comprising following steps：
（1）The hot core box mould without magnetic potassium steel balance weight is made according to drawing requirement；
（2）It will（1）Middle mold is installed on core shooter, is installed in place；
（3）The precoated sand is packed into core shooter in hot box, is injected precoated sand in the cavity of the mold using air pressure,
The precoated sand is that nice foundry sand is mixed and processed with thermosetting resin sand, and wherein the addition of thermosetting resin is mound chiltern
The 3% of amount, and the granularity of the nice foundry sand is 140-200 mesh, dihedral coefficient≤1.06, refractoriness >=1700 DEG C, Oxygen potential >=
99%, mold is heated to the thermosetting resin that 240 DEG C make in precoated sand and is cured, the precoated sand sand mold of curing molding is obtained, in institute
State the sand mold cavity made in precoated sand sand mold more than rough casting；
（4）1620 DEG C of casting molten steel is poured into cooling 4h in precoated sand sand mold cavity to be molded to obtain product blank；
（5）Process processes to obtain finished product after blank is passed through.
Embodiment 3
A kind of no magnetic potassium steel balance weight processing technology comprising following steps：
（1）The hot core box mould without magnetic potassium steel balance weight is made according to drawing requirement；
（2）It will（1）Middle mold is installed on core shooter, is installed in place；
（3）The precoated sand is packed into core shooter in hot box, is injected precoated sand in the cavity of the mold using air pressure,
The precoated sand is that nice foundry sand is mixed and processed with thermosetting resin sand, and wherein the addition of thermosetting resin is mound chiltern
The 5% of amount, and the granularity of the nice foundry sand is 140-200 mesh, dihedral coefficient≤1.06, refractoriness >=1700 DEG C, Oxygen potential >=
99%, mold is heated to the thermosetting resin that 300 DEG C make in precoated sand and is cured, the precoated sand sand mold of curing molding is obtained, in institute
State the sand mold cavity made in precoated sand sand mold more than rough casting；
（4）1700 DEG C of casting molten steel is poured into cooling 5h in precoated sand sand mold cavity to be molded to obtain product blank；
（5）Process processes to obtain finished product after blank is passed through.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will all be fallen in scope of the presently claimed invention.
Claims (5)
1. a kind of precoated sand, which is characterized in that the precoated sand is mixed and processed for nice foundry sand with thermosetting phenolic resin, and
Refractoriness >=1700 DEG C of the nice foundry sand, Oxygen potential >=99%.
2. a kind of precoated sand according to claim 1, which is characterized in that the granularity of the nice foundry sand is 140-200 mesh,
Dihedral coefficient≤1.06.
3. a kind of precoated sand according to claim 1, which is characterized in that thermosetting phenolic resin adds in the precoated sand
Enter the 2%-5% that amount is nice foundry sand quality.
4. it is a kind of using precoated sand described in claims 1 or 22 without magnetic potassium steel balance weight processing technology, which is characterized in that packet
Include following steps：
The hot core box mould without magnetic potassium steel balance weight is made according to drawing requirement；
It will（1）Middle mold is installed on core shooter, is installed in place；
The precoated sand is packed into core shooter hot box, is injected precoated sand in the cavity of the mold using air pressure, by mould
Tool is heated to 200~300 DEG C of resin solidifications for making precoated sand surface, obtains the precoated sand sand mold of curing molding, is covered described
The sand mold cavity more than rough casting is made in film sand sand mold；
Molten steel is poured into be cooled and shaped in precoated sand sand mold cavity and obtains product blank；
Process processes to obtain finished product after blank is passed through.
5. a kind of no magnetic potassium steel balance weight processing technology according to claim 4, which is characterized in that the step（4）
Middle cooling time is 3~5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611126274.0A CN108607949A (en) | 2016-12-09 | 2016-12-09 | A kind of precoated sand and using its without magnetic potassium steel balance weight processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611126274.0A CN108607949A (en) | 2016-12-09 | 2016-12-09 | A kind of precoated sand and using its without magnetic potassium steel balance weight processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108607949A true CN108607949A (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611126274.0A Pending CN108607949A (en) | 2016-12-09 | 2016-12-09 | A kind of precoated sand and using its without magnetic potassium steel balance weight processing technology |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343415A (en) * | 2011-09-29 | 2012-02-08 | 南昌航空大学 | Casting coated sand suitable for selective laser sintering forming and manufacturing method thereof |
| CN103100647A (en) * | 2013-03-04 | 2013-05-15 | 无锡蠡湖叶轮制造有限公司 | Precoated sand for heat-resistant stainless steel casting |
| CN103551492A (en) * | 2013-11-13 | 2014-02-05 | 南昌航空大学 | Precoated sand material applicable to laser sintering of magnesium alloy, and preparation method thereof |
| CN103658506A (en) * | 2013-12-31 | 2014-03-26 | 安顺学院 | Easy-to-fill precoated sand and preparation process thereof |
| CN105234641A (en) * | 2015-11-18 | 2016-01-13 | 浙江百达精工股份有限公司 | High manganese steel balance block manufacturing method |
-
2016
- 2016-12-09 CN CN201611126274.0A patent/CN108607949A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343415A (en) * | 2011-09-29 | 2012-02-08 | 南昌航空大学 | Casting coated sand suitable for selective laser sintering forming and manufacturing method thereof |
| CN103100647A (en) * | 2013-03-04 | 2013-05-15 | 无锡蠡湖叶轮制造有限公司 | Precoated sand for heat-resistant stainless steel casting |
| CN103551492A (en) * | 2013-11-13 | 2014-02-05 | 南昌航空大学 | Precoated sand material applicable to laser sintering of magnesium alloy, and preparation method thereof |
| CN103658506A (en) * | 2013-12-31 | 2014-03-26 | 安顺学院 | Easy-to-fill precoated sand and preparation process thereof |
| CN105234641A (en) * | 2015-11-18 | 2016-01-13 | 浙江百达精工股份有限公司 | High manganese steel balance block manufacturing method |
Non-Patent Citations (3)
| Title |
|---|
| 李传栻: "《铸造技术应用手册 第4卷 铸造工艺及造型材料》", 31 January 2012, 中国电力出版社 * |
| 李波，等: "原材料对酚醛树脂覆膜砂性能的影响", 《热加工工艺》 * |
| 黄天佑: "《铸造手册 第4卷 造型材料》", 30 November 2014, 机械工业出版社 * |
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