CN103909223A - Collapsible cold iron composite material and application method thereof - Google Patents

Collapsible cold iron composite material and application method thereof Download PDF

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Publication number
CN103909223A
CN103909223A CN201410142307.5A CN201410142307A CN103909223A CN 103909223 A CN103909223 A CN 103909223A CN 201410142307 A CN201410142307 A CN 201410142307A CN 103909223 A CN103909223 A CN 103909223A
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CN
China
Prior art keywords
composite
defeated
dispersed
chill
dispersed chill
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Pending
Application number
CN201410142307.5A
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Chinese (zh)
Inventor
张耀
张雪冬
任子清
侯建兵
袁际章
师文琴
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National No616 Plant
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National No616 Plant
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Publication date
Application filed by National No616 Plant filed Critical National No616 Plant
Priority to CN201410142307.5A priority Critical patent/CN103909223A/en
Publication of CN103909223A publication Critical patent/CN103909223A/en
Pending legal-status Critical Current

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Abstract

The invention belongs to the technical field of casting and provides a collapsible cold iron composite material and an application method thereof, aiming at eliminating shrinkage porosity and shrinkage cavity defects of castings and solving shrinkage porosity and loosening leakage phenomena of inner cavity parts of the castings. The collapsible cold iron composite material comprises a metal ball, metal powder, raw sand and a self-hardening resin binding agent. Prefabricated cold iron or collapsible cold iron sand can be selected according to different structures of the castings to be directly molded. Therefore, aiming at the various castings, particularly a colored alloy casting, the collapsible cold iron composite material provided by the invention can be used for replacing common cold iron; the collapsible cold iron composite material not only has a chilling effect which is close to that of the common cold iron, but can also effectively eliminate the shrinkage porosity and loosening leakage phenomena of the castings; the composite material can be arranged at any part of a mould and a core, particularly narrow parts and turning parts of inner cavities of the castings and parts which can not be cleaned; the shrinkage porosity and loosening leakage phenomena of the inner cavities of the castings are solved; particularly, the elimination of the shrinkage porosity and loosening leakage phenomena of the inner cavities of large-size complicated parts becomes possible from impossible and the collapsible cold iron composite material has very high application values and promotion values.

Description

One can defeated and dispersed chill composite and using method thereof
Technical field
The invention belongs to casting technology field, being specifically related to one can defeated and dispersed chill composite and using method thereof.
Background technology
In Foundry Production, chill is for regulating casting solidification order and setting rate, also can working to improve foundry goods dense structure degree etc., belongs to the measure of casting auxiliary process.
Different types of foundry goods, has different structures and wall thickness, and the position wall thickness design that requirement of strength is high is conventionally relatively thick, and the position wall thickness design relative thin that requirement of strength is low, also needs to increase some boss or convex closure etc. at the position foundry goods that needs tight joint.
First solidify heavy wall position after coagulation according to the theoretical foundry goods thin-walled of casting solidification position, first solidifying position organizes relatively fine and close, the position of after coagulation there will be the defects such as shrinkage cavity and porosity in the time can not get timely the supplementing of liquid metal, cause foundry goods interior tissue not fine and close, serious meeting produces seepage, in order to eliminate Shrinkage Porosity leakage problems, the process of taking at present: the one, by being set, rising head strengthens the feeding capacity of thick large part; The 2nd, utilize placement chill to regulate the setting rate of thick large part.
The chill using in Foundry Production is at present common chill mostly, and the material of preparing common chill comprises iron, aluminium, copper etc., and the preparation of chill can obtain also and can obtain by the method for machining by the method for casting.
Use common chill to have following problem: the one, the chill of preparing by casting method is owing to being subject to the impact of the factors such as shrinkage coefficient, apperance precision, core quality, there is certain deviation in shape, the size of chill shape, size and the model of preparation, particularly retrodeviating missionary society at chill surface coating sand increases, therefore cause chill and model to be difficult to fit like a glove, after moulding, chill surface and whose surfaces joint there will be obvious linking vestige or gap, affect the surface quality of foundry goods; The chill dimensional accuracy of preparing by the method for processing is higher than the chill precision obtaining by casting method, and surface smoothness is good, but processing charges is also very high; The 2nd, for the narrow foundry goods of inner chamber, although common chill cannot be put into or intracavity space is large but the relatively narrow and small common chill of putting into of the import and export of inner chamber cannot clear from inner chamber, in engine Large Complicated Structural Component casing, cylinder cap and complex casing class foundry goods, air cavity, water cavity have many convex closures to exist, all need to place chill and carry out Quench, but owing to being subject to, inner chamber is narrow or import and export the common chill of narrow and small restriction and can not use, and shrinkage porosite Seepage often appears in this class foundry goods convex closure place.
As shown in Figure 1, from the core box structural analysis of certain upper body, there are multiple convex closures at the inner chamber of foundry goods, because convex closure cannot carry out feeding by rising head is set at the inner chamber of foundry goods, can only strengthen the Quench to convex closure by placing chill, but housing inner chamber is relatively narrow and clearance hole size is less than the size of chill, and chill cannot clear from core cavity.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is to provide one can defeated and dispersed chill composite and using method thereof, this composite is take metal material as main, common roughing sand and self-hardening resin sandbinder are auxiliary formulated, not only possess the chill effect close with common chill, and it can be defeated and dispersed, therefore it can be placed on any part of core, comprise the turning site of inner chamber narrow positions or polymorphic structure, because this composite has good collapsibility, in casting cleaning process, chill can be defeated and dispersed together along with core sand, do not need to clear up specially.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides one can defeated and dispersed chill composite, it is characterized in that: this composite comprises metal ball, metal powder, roughing sand and self-hardening resin sandbinder.
Wherein, the diameter of described metal ball is 0.2~0.5 ㎜; The granularity of described metal powder is 70~100 orders; The granularity of described roughing sand is 50~100 orders.
Wherein, described metal ball, metal powder, roughing sand and self-hardening resin sandbinder account for described ratio that can defeated and dispersed chill composite weight and are respectively 50 ﹪~70 ﹪, 20 ﹪~40 ﹪, 10 ﹪~30 ﹪, 3 ﹪~4 ﹪.
Wherein, can not there be corrosion and caking in described metal ball and metal powder surface.
Wherein, described metal ball is shot, shot or aluminum shot; Described metal powder is iron powder or copper powder; Described self-hardening resin sandbinder is that resin and curing agent are composited.
Wherein, the selection of described composite, proportioning and thickness can need the degree of Quench to adjust according to foundry goods, and the selection of composite should match with the roughness of cast(ing) surface.
Wherein, when foundry goods needs strong Quench, in described composite, metal powder is chosen as copper powder material; When foundry goods needs weak Quench, the ratio that in described composite, metal ball is selected to adopt aluminum shot or increased roughing sand.
Wherein, described resin and curing agent account for being in equal proportions of described composite weight.
Use a described method that can defeated and dispersed chill composite, it is characterized in that: comprise the steps:
Step 1, on model or core box prefabricated described can defeated and dispersed chill composite, by described can being placed in model or core box by defeated and dispersed chill composite after solidifying;
Step 2, places model, core-sand moulding, described can defeated and dispersed chill composite identical with type, core box.
Use a described method that can defeated and dispersed chill composite, it is characterized in that: comprise the steps:
Step 1, before mixed manufacturing mold core sand first mixed make described can defeated and dispersed chill composite;
Step 2, will can be placed on position the compacting that need to let cool iron by defeated and dispersed chill composite by step 1 gained;
Step 3, by the mixed core sand making cover described can defeated and dispersed chill composite on and other position, described can solidifying together with core sand by defeated and dispersed chill composite;
Step 4, can defeated and dispersed chill composite described in directly covering on core box.
Wherein, described thickness that can defeated and dispersed chill composite needs the degree of Quench to determine according to foundry goods, is requiring the position that chill effect is stronger, described thickness >=20 ㎜ that can defeated and dispersed chill composite; Requiring the position that chill effect is general, described thickness >=10 ㎜ and < 20 ㎜ that can defeated and dispersed chill composite.
Wherein, described shape that can defeated and dispersed chill composite all covers by Quench position.
(3) beneficial effect
Compared with prior art, the present invention possesses following beneficial effect:
1, for various complex structural member casings, cylinder cap and Shell-Class foundry goods, particularly non-ferrous alloy casting, in the case of eliminating Shrinkage Porosity, shrinkage cavity defect by the method for placing rising head or increase common chill, provided by the invention can the alternative common chill of defeated and dispersed chill composite, not only there is the chill effect close with common chill, and can effectively eliminate Shrinkage Porosity, shrinkage cavity defect;
2, any position that can defeated and dispersed chill composite can be placed on type, core provided by the invention, particularly core cavity stenosis, turning and the position that cannot clear up, core cavity position shrinkage porosite, loose Seepage are solved, particularly make the elimination of large-scale complex component inner chamber shrinkage porosite, loose seepage defect from not becoming possibility, have very high use value and promotional value.
Accompanying drawing explanation
Fig. 1 is the core box structure chart that core cavity has multiple convex closures;
Fig. 2 uses prefabricated upper body core box structure chart that can defeated and dispersed chill composite provided by the invention;
Fig. 3 is the lower case core box structure chart that can defeated and dispersed chill composite provided by the invention that uses mixed system.
The specific embodiment
For making object of the present invention, content and advantage clearer, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
Provided by the invention can defeated and dispersed chill composite, comprise metal ball, metal powder, roughing sand and self-hardening resin sandbinder.
Wherein, the diameter of described metal ball is 0.2~0.5 ㎜; The granularity of described metal powder is 70~100 orders; The granularity of described roughing sand is 50~100 orders.
Wherein, described metal ball, metal powder, roughing sand and self-hardening resin sandbinder account for described ratio that can defeated and dispersed chill composite weight and are respectively 50 ﹪~70 ﹪, 20 ﹪~40 ﹪, 10 ﹪~30 ﹪, 3 ﹪~4 ﹪.
Wherein, can not there be corrosion and caking in described metal ball and metal powder surface.
Wherein, described metal ball is shot, shot or aluminum shot; Described metal powder is iron powder or copper powder; Described self-hardening resin sandbinder is that resin and curing agent are composited.
Wherein, the selection of described composite, proportioning and thickness can need the degree of Quench to adjust according to foundry goods, and the selection of composite should match with the roughness of cast(ing) surface.
Wherein, when foundry goods needs strong Quench, in described composite, metal powder is chosen as copper powder material; When foundry goods needs weak Quench, the ratio that in described composite, metal ball is selected to adopt aluminum shot or increased roughing sand.
Wherein, described resin and curing agent account for being in equal proportions of described composite weight.
The described process that can defeated and dispersed chill composite of preparation: adopt spherical or pot shape puddle mixer mulling.
Mixing technique: determine described proportioning that can defeated and dispersed chill composite, pour load weighted shot or shot, roughing sand into puddle mixer mixed system 30 seconds, then pour again iron powder or copper powder into mixed restriction 30 seconds, observe after each component mixes and add the mixed system of curing agent 1 minute, then add the mixed system of binding agent can use for 1 minute.
Use a described method that can defeated and dispersed chill composite, comprise the steps:
Step 1, on model or core box prefabricated described can defeated and dispersed chill composite, by described can being placed in model or core box by defeated and dispersed chill composite after solidifying;
Step 2, places model, core-sand moulding, described can defeated and dispersed chill composite identical with type, core box.As shown in Figure 2, the 1 plain edition core sand for covering; 2 is upper body core box; 3 be prefabricated can defeated and dispersed chill composite.The easy to operate foundry goods that is suitable for batch production of this method.
Use a described method that can defeated and dispersed chill composite, it is characterized in that: comprise the steps:
Step 1, before mixed manufacturing mold core sand first mixed make described can defeated and dispersed chill composite;
Step 2, will can be placed on position the compacting that need to let cool iron by defeated and dispersed chill composite by step 1 gained;
Step 3, by the mixed core sand making cover described can defeated and dispersed chill composite on and other position, described can solidifying together with core sand by defeated and dispersed chill composite;
Step 4, can defeated and dispersed chill composite described in directly covering on core box.As shown in Figure 3,1 can defeated and dispersed chill composite for being placed on the prefabricated of core box convex closure position; 2 is core box body; 3 is plain edition core sand; 4 can defeated and dispersed chill composite for covering the mixed system at convex closure place.Also cannot place prefabricatedly can defeated and dispersed chill in the situation that cannot place common chill, it be very convenient in this way to adopt, and is applicable to the production of single and mini-batch production foundry goods.
Wherein, described thickness that can defeated and dispersed chill composite needs the degree of Quench to determine according to foundry goods, is requiring the position that chill effect is stronger, described thickness >=20 ㎜ that can defeated and dispersed chill composite; Requiring the position that chill effect is general, described thickness >=10 ㎜ and < 20 ㎜ that can defeated and dispersed chill composite; Described shape that can defeated and dispersed chill composite is advisable all to cover by Quench position.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.

Claims (12)

1. can a defeated and dispersed chill composite, it is characterized in that: this composite comprises metal ball, metal powder, roughing sand and self-hardening resin sandbinder.
2. as claimed in claim 1 can defeated and dispersed chill composite, it is characterized in that: the diameter of described metal ball is 0.2~0.5 ㎜; The granularity of described metal powder is 70~100 orders; The granularity of described roughing sand is 50~100 orders.
3. as claimed in claim 1 or 2 can defeated and dispersed chill composite, it is characterized in that: described metal ball, metal powder, roughing sand and self-hardening resin sandbinder account for described ratio that can defeated and dispersed chill composite weight and be respectively 50 ﹪~70 ﹪, 20 ﹪~40 ﹪, 10 ﹪~30 ﹪, 3 ﹪~4 ﹪.
4. as described in as arbitrary in claim 1-3 can defeated and dispersed chill composite, it is characterized in that: can not there be corrosion and caking in described metal ball and metal powder surface.
5. as described in as arbitrary in claim 1-4 can defeated and dispersed chill composite, it is characterized in that: described metal ball is shot, shot or aluminum shot; Described metal powder is iron powder or copper powder; Described self-hardening resin sandbinder is that resin and curing agent are composited.
6. as claimed in claim 5 can defeated and dispersed chill composite, it is characterized in that: selection, proportioning and the thickness of described composite can need the degree of Quench to adjust according to foundry goods, and the selection of composite should match with the roughness of cast(ing) surface.
7. as claimed in claim 6 can defeated and dispersed chill composite, it is characterized in that: when foundry goods needs strong Quench, in described composite, metal powder is chosen as copper powder material; When foundry goods needs weak Quench, the ratio that in described composite, metal ball is selected to adopt aluminum shot or increased roughing sand.
8. as claimed in claim 5 can defeated and dispersed chill composite, it is characterized in that: described resin and curing agent account for being in equal proportions of described composite weight.
9. right to use requires the arbitrary described method that can defeated and dispersed chill composite of 1-8, it is characterized in that: comprise the steps:
Step 1, on model or core box prefabricated described can defeated and dispersed chill composite, by described can being placed in model or core box by defeated and dispersed chill composite after solidifying;
Step 2, places model, core-sand moulding, described can defeated and dispersed chill composite identical with core.
10. right to use requires the arbitrary described method that can defeated and dispersed chill composite of 1-8, it is characterized in that: comprise the steps:
Step 1, before mixed manufacturing mold core sand first mixed make described can defeated and dispersed chill composite;
Step 2, will can be placed on position the compacting that need to let cool iron by defeated and dispersed chill composite by step 1 gained;
Step 3, by the mixed core sand making cover described can defeated and dispersed chill composite on and other position, described can solidifying together with core sand by defeated and dispersed chill composite;
Step 4, can defeated and dispersed chill composite described in directly covering on core box.
11. as arbitrary in claim 9-10 as described in use can defeated and dispersed chill composite method, it is characterized in that: described thickness that can defeated and dispersed chill composite needs the degree of Quench to determine according to foundry goods, requiring the position that chill effect is stronger, described thickness >=20 ㎜ that can defeated and dispersed chill composite; Requiring the position that chill effect is general, described thickness >=10 ㎜ and < 20 ㎜ that can defeated and dispersed chill composite.
12. as arbitrary in claim 9-11 as described in use can defeated and dispersed chill composite method, it is characterized in that: described shape that can defeated and dispersed chill composite all covers by Quench position.
CN201410142307.5A 2014-04-10 2014-04-10 Collapsible cold iron composite material and application method thereof Pending CN103909223A (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106734893A (en) * 2016-11-29 2017-05-31 贵州安吉航空精密铸造有限责任公司 A kind of method for solving light-alloy sand-cast rarefaction defect
CN106734859A (en) * 2017-02-27 2017-05-31 李水金 A kind of high thermal conductive resin sand and its production method
CN108421960A (en) * 2018-03-19 2018-08-21 河北硕凯铸造有限公司 One kind is with type chill and its preparation process
CN110153369A (en) * 2019-05-07 2019-08-23 广东恒成科技股份有限公司 A kind of consumption of resin sand reduces and the increased sand casting process of intensity
CN110252940A (en) * 2019-07-05 2019-09-20 宁波永祥铸造有限公司 A kind of casting core material and core-making method

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CN103480794A (en) * 2013-09-13 2014-01-01 国营第六一六厂 Composite material used for casting aluminum alloy box body oil duct and method thereof

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JPS6422449A (en) * 1987-07-16 1989-01-25 Ryobi Ltd Production of collapsible core
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CN103480794A (en) * 2013-09-13 2014-01-01 国营第六一六厂 Composite material used for casting aluminum alloy box body oil duct and method thereof

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106734893A (en) * 2016-11-29 2017-05-31 贵州安吉航空精密铸造有限责任公司 A kind of method for solving light-alloy sand-cast rarefaction defect
CN106734859A (en) * 2017-02-27 2017-05-31 李水金 A kind of high thermal conductive resin sand and its production method
CN108421960A (en) * 2018-03-19 2018-08-21 河北硕凯铸造有限公司 One kind is with type chill and its preparation process
CN110153369A (en) * 2019-05-07 2019-08-23 广东恒成科技股份有限公司 A kind of consumption of resin sand reduces and the increased sand casting process of intensity
CN110252940A (en) * 2019-07-05 2019-09-20 宁波永祥铸造有限公司 A kind of casting core material and core-making method

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