CN109365741A - A kind of preparation method casting coupler body molding sand - Google Patents
A kind of preparation method casting coupler body molding sand Download PDFInfo
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- CN109365741A CN109365741A CN201811563065.1A CN201811563065A CN109365741A CN 109365741 A CN109365741 A CN 109365741A CN 201811563065 A CN201811563065 A CN 201811563065A CN 109365741 A CN109365741 A CN 109365741A
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- quartz sand
- coupler body
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- body molding
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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
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/181—Cements, oxides or clays
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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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/10—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for influencing the hardening tendency of the mould material
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- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The present invention relates to a kind of preparation methods for casting coupler body molding sand, belong to railway casting coupler body technical field.Described method includes following steps: (I) type quartz sand proportion: quartz sand 100% (quality), inorganic binder, reinforcing agent；Described: the additive amount of inorganic binder is the 2.8% of quartz sand quality, and the additive amount of the reinforcing agent is the 20% of inorganic binder quality；(II) quartz sand is mixed；(III) venting；(IV) air blowing hardening process；(V) molding.The present invention has manufactured a kind of american railway coupler buffering device casting coupler body by a kind of inorganic binder, reinforcing agent, and using the technique that carbon dioxide accelerates.
Description
Technical field
The present invention relates to railway casting coupler body technical field more particularly to a kind of preparation methods for casting coupler body molding sand.
Background technique
Currently, american railway coupler buffering device is with casting coupler body, purchase quantity is relatively more at home, and molding sand is that production is this
The necessary material of coupler body, but domestic production producer is generally used traditional handicraft at present and molding sand material preparation casts coupler body
Mold.
The molding sand material that traditional handicraft uses
In addition, in traditional handicraft, the preparation casting coupler body method for preparing molding sand material are as follows: quartz sand+clay (dry-mixed 2-
3 minutes), then plus waterglass mixed 5-7 minutes of 7~8%, however, this molding sand material and preparation process the problem is that:
(1) quartz sand cannot recycle after casting, and waste is serious, and cost is very high.(2) if the water-glass sand after casting is with rain
The media such as water, river water enter underground, can cause seriously to pollute to underground water.(3) production cycle of mold is long, can not sufficiently expire
Foot, to production requirement, is now badly in need of to produce in batches and the production cycle is shorter to supplier to casting coupler body, therefore, it is necessary to
Research and develop the sand formulation and its preparation process of a kind of new casting coupler body.
Summary of the invention
For above-mentioned problems of the prior art, the present invention is intended to provide a kind of preparation side for casting coupler body molding sand
Method.The present invention has manufactured one kind for casting by a kind of inorganic binder, reinforcing agent, and using the technique that carbon dioxide accelerates
The molding sand of american railway coupler buffering device coupler body, method of the invention is not only high-efficient, but also the gas hole defect of the product prepared
It significantly reduces, quality is increased substantially.
An object of the present invention is to provide a kind of preparation method for casting coupler body molding sand.
The second object of the present invention is to provide the application of the preparation method of above-mentioned casting coupler body molding sand.
For achieving the above object, the invention discloses following technical proposals:
Firstly, the present invention discloses a kind of preparation method for casting coupler body molding sand, include the following steps:
(I) sand mold matches: quartz sand 100% (quality), inorganic binder, reinforcing agent；The tret of the inorganic binder
For the 2.8-3.4% of quartz sand quality, the additive amount of the reinforcing agent is the 18-24% of inorganic binder quality；It is described inorganic
Binder is made of the cement that mass ratio is 1-3:0.8-1.5 and clay, and wherein cement is accelerator for hardening, and the main function of clay is
The carbon dioxide being blown into sand mold is preferably absorbed, guarantees coming into full contact between carbon dioxide and inorganic binder, reinforcing agent
And reaction, promote the hardening efficiency of sand mold and the utilization rate of carbon dioxide, it, can because clay has the characteristics that densification is rich in micropore
Adsorb and seal up for safekeeping a large amount of carbon dioxide.
(II) mix quartz sand: specific step is as follows:
1. plus quartz sand and water: stirring evenly；
2. plus reinforcing agent, cover plastic cloth mixing quartz sand；
3. plus inorganic binder, mixing quartz sand take out quartz sand；
4. mixed quartz sand is covered with plastic cloth.
(III) five cores 1) venting: are pricked on plastic cloth upper surface, wherein one intermediate, each one of four sides, five
A core depth is as far as possible close on mold, especially mold plus the part of venting plug, intermediate core are smoothed out with wet quartz sand；2) so
Four cores are tiltedly pricked on the side of plastic cloth afterwards；Four cores are inserted into gas blow pipe on side, and when intubation prevents gas blow pipe front end into stone
Sand；3) it is compacted at intubation.
(IV) air blowing hardening process:
(1) air blowing controller band valve side CO2Gas source；
(2) compressed air is using preceding needing to empty in water in bellows chamber；
(3) five in air blowing controller outlet valve are opened, wherein four are inserted into quartz sand with step (III)
Gas blow pipe is corresponding, and a remaining outlet valve is judged the size of gas flow by blowing operation person in air blowing process；
(4) it opens and blows CO2Side ball valve on pipeline opens slide valve, CO is blown into quartz sand2；
(5) CO is closed2Side ball valve opens simultaneously compressed air side ball valve, opens to the one third of stroke, blowing compressed air；
(6) compressed air ball valve is closed, CO is closed2Side slide valve.
(V) molding: tracheae is extracted to get casting coupler body molding sand.
In step (I), the reinforcing agent is silane coupling agent.Organic functional base in silane coupling agent can and quartz sand,
Interfacial reaction is generated between cement, clay in inorganic binder, forms inorganic matrix-silane coupling agent-inorganic matrix knot
Structure, make between quartz sand, cement and clay formed be connected with each other, tangle reticular structure, thus play improve molding sand intensity,
The effects of hardening efficiency.Further, the silane coupling agent includes vinyltriethoxysilane, vinyl trimethoxy silicon
Alkane, vinyl three (beta-methoxy ethyoxyl) silane etc..
Step 1. in, the additional amount of the water is the 5-8% of quartz sand quality.
Step 2. in, the mixed quartz sand time be 30-40s.
Step 3. in, the mixed quartz sand time be 90-100s.
In step (1), the CO2Air pressure be set as 0.30-0.35MPa.
It is described to be blown into CO in step (4)2Method are as follows: first with 5-10m3/ h blows 8-10s, then with 12-15m3/ h blows 40-
45s。
In step (5), the time of the blowing compressed air is 25-28s, air pressure 0.30-0.35MPa.
In step 5, further include the steps that clearing up the quartz sand hardened in escape pipe, method particularly includes: mould smooth face
On sprinkle drystone sand, core box (core box: making the mold of sand core) is overturn thereon, opens core box clamp, and two operators are same
When tap the molding of core box proper site.
Finally, the invention discloses the preparation methods of casting coupler body molding sand to prepare the application in railway coupler buffering device.
Compared with prior art, the present invention mention achieve it is following the utility model has the advantages that
(1) preparation method speed of the invention is fast, accelerates process circulation；The gas hole defect of the product of preparation obviously subtracts
Few, product quality is increased substantially.
(2) raw material of preparation casting coupler body of the invention can harden under the action of carbon dioxide, not need using water
Glass not only improves production efficiency, but also avoids pollution environment.Meanwhile quartz sand can be recycled, and greatly reduce life
Produce cost；Test proves that raw material of the invention and the relatively original technique of method cast the preparation overall cost original of coupler body molding sand
5000 yuan of product cost per ton of first technique is reduced to 3000 yuan, and production efficiency is increased to by making coupler body 30-40 part daily originally
Coupler body 60-70 part is made after change daily, scrappage is reprocessed because of gas hole defect and 5-10%, synergy is reduced to by original 15-20%
Obviously.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, currently, american railway coupler buffering device casting coupler body purchase quantity ratio at home
More, domestic production producer all uses traditional handicraft and material, and the production cycle is long, at high cost, and traditional material is to environment dirt
Dye does not meet the requirement of national Green foundry theme at present, cannot sufficiently meet to casting coupler body to production requirement than more serious；
To solve the above-mentioned problems, the present invention provides a kind of preparation method for casting coupler body molding sand, below with reference to specific embodiment
The present invention is described further.
Embodiment 1
A kind of preparation method casting coupler body molding sand, includes the following steps:
1, sand mold matches: quartz sand 100% (quality), inorganic binder, reinforcing agent；It is described: the addition of inorganic binder
Amount is the 3.0% of quartz sand quality, and the inorganic binder is made of the cement that mass ratio is 1.8:1.5 and clay；The increasing
Strong agent is vinyltriethoxysilane, and additive amount is the 20% of inorganic binder quality.
2, mix quartz sand: specific step is as follows:
1. quartz sand is added, the water of quartz sand quality 8% is added: starting and scrapes board motor, 25 circle of stirring is shut down；
2. lid plastic cloth stirs 32s by reinforcing agent by hand embedment quartz sand, shut down；
3. plus inorganic binder, mix quartz sand 90s after go out quartz sand；
4. mixed quartz sand is covered using plastic cloth.
3, five cores on plastic cloth upper surface venting: 1) are pricked, wherein one intermediate, each one of four sides, five gas
Eye depth is as far as possible close on mold, especially mold plus the part of venting plug, intermediate core are smoothed out with wet quartz sand；2) then exist
Four cores are tiltedly pricked on the side of plastic cloth；Four cores are inserted into gas blow pipe on side, and when intubation prevents gas blow pipe front end into quartz sand；
3) compacting by hand at intubation, gas overflows from this when being blown with reducing.
4, air blowing hardening process:
(1) air blowing controller band valve side CO2Gas source, the CO2Air pressure be set as 0.30MPa.
(2) compressed air is using preceding needing to empty in water in bellows chamber；
(3) open air blowing controller outlet valve in five, wherein four in step 3 insertion quartz sand in air blowing
Pipe is corresponding, and a remaining gas blow pipe is judged the size of gas flow by blowing operation person in air blowing process；
(4) it opens and blows CO2Pipe on CO2Side ball valve is (for switch CO2Blow), open slide valve, first with 5m3/h
10s is blown, then with 13m3/ h blows 45s；
(5) CO is closed2Side ball valve opens simultaneously compressed air side ball valve, opens to the one third of stroke, blowing compressed air
26s, air pressure 0.30MPa；
(6) compressed air ball valve is closed, CO is closed2Side slide valve.
5, molding: tracheae is extracted to get casting coupler body molding sand.
Embodiment 2
A kind of preparation method casting coupler body molding sand, includes the following steps:
1, sand mold matches: quartz sand 100% (quality), inorganic binder, reinforcing agent；It is described: the addition of inorganic binder
Amount is the 2.8% of quartz sand quality, and the inorganic binder is made of the cement that mass ratio is 1.0:1.2 and clay；The increasing
Strong agent is vinyl three (beta-methoxy ethyoxyl) silane, and additive amount is the 24% of inorganic binder quality.
2, mix quartz sand: specific step is as follows:
1. plus quartz sand, be added quartz sand quality 5% water: start and scrape board motor, stirring 30 circle shut down；
2. lid plastic cloth stirs 30s by reinforcing agent by hand embedment quartz sand, shut down；
3. plus inorganic binder, mix quartz sand 96s after go out quartz sand；
4. mixed quartz sand is covered using plastic cloth.
3, five cores on plastic cloth upper surface venting: 1) are pricked, wherein one intermediate, each one of four sides, five gas
Eye depth is as far as possible close on mold, especially mold plus the part of venting plug, intermediate core are smoothed out with wet quartz sand；2) then exist
Four cores are tiltedly pricked on the side of plastic cloth；Four cores are inserted into gas blow pipe on side, and when intubation prevents gas blow pipe front end into quartz sand；
3) compacting by hand at intubation, gas overflows from this when being blown with reducing.
4, air blowing hardening process:
(1) air blowing controller band valve side CO2Gas source, the CO2Air pressure be set as 0.32MPa.
(2) compressed air is using preceding needing to empty in water in bellows chamber；
(3) open air blowing controller outlet valve in five, wherein four in step 3 insertion quartz sand in air blowing
Pipe is corresponding, and a remaining gas blow pipe is judged the size of gas flow by blowing operation person in air blowing process；
(4) CO is opened2Side ball valve opens slide valve, first with 8m3/ h blows 9s, then with 12m3/ h blows 40s；
(5) CO is closed2Side ball valve opens simultaneously compressed air side ball valve, opens to the one third of stroke, blowing compressed air
25s, air pressure 0.32MPa；
(6) compressed air ball valve is closed, CO is closed2Side slide valve.
Embodiment 3
A kind of preparation method casting coupler body molding sand, includes the following steps:
1, sand mold matches: quartz sand 100% (quality), inorganic binder, reinforcing agent；It is described: the addition of inorganic binder
Amount is the 3.4% of quartz sand quality, and the inorganic binder is made of the cement that mass ratio is 3.0:0.8 and clay；The increasing
Strong agent is vinyl three (beta-methoxy ethyoxyl) silane, and additive amount is the 18% of inorganic binder quality.
2, mix quartz sand: specific step is as follows:
1. plus quartz sand, be added quartz sand quality 6% water: start and scrape board motor, stirring 20 circle shut down；
2. lid plastic cloth stirs 40s by reinforcing agent by hand embedment quartz sand, shut down；
3. plus inorganic binder, mix quartz sand 100s after go out quartz sand；
4. mixed quartz sand is covered using plastic cloth.
3, five cores on plastic cloth upper surface venting: 1) are pricked, wherein one intermediate, each one of four sides, five gas
Eye depth is as far as possible close on mold, especially mold plus the part of venting plug, intermediate core are smoothed out with wet quartz sand；2) then exist
Four cores are tiltedly pricked on the side of plastic cloth；Four cores are inserted into gas blow pipe on side, and when intubation prevents gas blow pipe front end into quartz sand；
3) compacting by hand at intubation, gas overflows from this when being blown with reducing.
4, air blowing hardening process:
(1) air blowing controller band valve side CO2Gas source, the CO2Air pressure be set as 0.35MPa.
(2) compressed air is using preceding needing to empty in water in bellows chamber；
(3) open air blowing controller outlet valve in five, wherein four in step 3 insertion quartz sand in air blowing
Pipe is corresponding, and a remaining gas blow pipe is judged the size of gas flow by blowing operation person in air blowing process；
(4) CO is opened2Side ball valve opens slide valve, first with 10m3/ h blows 8s, then with 15m3/ h blows 43s；
(5) CO is closed2Side ball valve opens simultaneously compressed air side ball valve, opens to the one third of stroke, blowing compressed air
28s, air pressure 0.35MPa；
(6) compressed air ball valve is closed, CO is closed2Side slide valve.
5, molding: tracheae is extracted to get casting coupler body molding sand.In addition, the quartz sand hardened in escape pipe is cleaned up,
Method particularly includes: drystone sand is sprinkled on shiny surface, core box is overturn thereon, opens core box clamp, two operators strike simultaneously
Hit the molding of core box proper site to get.
Embodiment test result is shown, of the invention relatively with the technique (traditional handicraft of background technology part) before improvement
Method make cast coupler body molding sand 5000 yuan of preparation overall cost original process product cost per ton be reduced to 3000 yuan, hook
The production efficiency of body is increased to 60-70 part by making 30-40 part daily originally, because gas hole defect reprocesses scrappage by original 15-
20% is reduced to 5-10%, significantly improves the efficiency of enterprise.
This is because the present invention uses carbon dioxide and inorganic bond relative to original molding sand raw material and preparation process
Interaction between agent, reinforcing agent realizes the hardening to molding sand, and in molding sand proportion of the invention, a small amount of cement is added
As for accelerator for hardening, a small amount of clay is added, the carbon dioxide being blown into sand mold using its porous characteristic absorption and storage is protected
Card molding sand has sufficient firm time, can improve the hardening efficiency of sand mold, can also reduce the loss of carbon dioxide, controls molding sand
Preparation cost；Meanwhile the present invention is by being added silane coupling agent, after agitation in hardening process, silane coupling agent and quartz
Sand, cement generate interfacial reaction between clay, form the reticular structure for being connected with each other, tangling, and improve the strong of molding sand to play
The effect of degree, quality sum reduces gas hole defect, guarantees high yield rate.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for those skilled in the art
For member, various changes and changes are possible in this application.Within the spirit and principles of this application, it is made it is any modification,
It with replacement, improves, should be included within the scope of protection of this application.
Claims (10)
1. a kind of preparation method for casting coupler body molding sand, it is characterised in that: described method includes following steps:
((I) sand mold proportion: quartz sand 100% (quality), inorganic binder, reinforcing agent；The tret of the inorganic binder is stone
The 2.8-3.4% of sand quality, the additive amount of the reinforcing agent are the 18-24% of inorganic binder quality；The inorganic bond
Agent is made of the cement that mass ratio is 1-3:0.8-1.5 and clay；
(II) mix quartz sand: specific step is as follows:
1. plus quartz sand and water: stirring evenly；
2. plus reinforcing agent, cover plastic cloth mixing quartz sand；
3. plus inorganic binder, mixing quartz sand take out quartz sand；
4. mixed quartz sand is covered with plastic cloth；
(III) five cores 1) venting: are pricked on plastic cloth upper surface, wherein one intermediate, each one of four sides, intermediate gas
Ophthalmically acceptable wet quartz sand smoothes out；2) four cores are then tiltedly pricked on the side of plastic cloth；Four cores are inserted into gas blow pipe, intubation on side
When prevent gas blow pipe front end into quartz sand；3) it is compacted at intubation；
(IV) air blowing hardening process:
(1) air blowing controller band valve side CO2Gas source；
(2) compressed air is using preceding needing to empty in water in bellows chamber；
(3) open air blowing controller outlet valve in five, wherein four with step (III) in be inserted into quartz sand in air blowing
Pipe is corresponding, and a remaining outlet valve is judged the size of gas flow by blowing operation person in air blowing process；
(4) it opens and blows CO2Side ball valve on pipeline opens slide valve, CO is blown into quartz sand2；
(5) CO is closed2Side ball valve opens simultaneously compressed air side ball valve, opens to the one third of stroke, blowing compressed air；
(6) compressed air ball valve is closed, CO is closed2Side slide valve；
(V) molding: tracheae is extracted to get casting coupler body molding sand.
2. the preparation method of casting coupler body molding sand as described in claim 1, it is characterised in that: in step (I), the enhancing
Agent is silane coupling agent；Preferably, the silane coupling agent includes vinyltriethoxysilane, vinyl trimethoxy silicon
Alkane, vinyl three (beta-methoxy ethyoxyl) silane.
3. as described in claim 1 casting coupler body molding sand preparation method, it is characterised in that: step 1. in, the water
Additional amount is the 5-8% of quartz sand quality.
4. as described in claim 1 casting coupler body molding sand preparation method, it is characterised in that: step 2. in, the mixed stone
The sand time is 30-40s.
5. as described in claim 1 casting coupler body molding sand preparation method, it is characterised in that: step 3. in, the mixed stone
The sand time is 90-100s.
6. the preparation method of casting coupler body molding sand as described in claim 1, it is characterised in that: in step (1), the CO2's
Air pressure is set as 0.30-0.35MPa.
7. the preparation method of casting coupler body molding sand as described in claim 1, it is characterised in that: described to be blown into step (4)
CO2Method are as follows: first with 5-10m3/ h blows 8-10s, then with 12-15m3/ h blows 40-45s.
8. the preparation method of casting coupler body molding sand as described in claim 1, it is characterised in that: in step (5), the blow pressure
The time of contracting air is 25-28s, air pressure 0.30-0.35MPa.
9. the preparation method of casting coupler body molding sand as described in claim 1, it is characterised in that: further include cleaning in step 5
The step of quartz sand hardened in escape pipe, method particularly includes: drystone sand is sprinkled on shiny surface, core box is overturn thereon,
Core box clamp is opened, two operators tap core box proper site molding simultaneously.
10. if the preparation method of the described in any item casting coupler body molding sand of claim 1-9 is in preparing railway coupler buffering device
Application.
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| CN201811563065.1A CN109365741B (en) | 2018-12-20 | 2018-12-20 | Preparation method of molding sand for casting hook body |
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| CN201811563065.1A CN109365741B (en) | 2018-12-20 | 2018-12-20 | Preparation method of molding sand for casting hook body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605346A (en) * | 2020-11-30 | 2021-04-06 | 宝鸡石油机械有限责任公司 | Casting method of hook body for hook of lifting system of ultra-deep well petroleum drilling machine |
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| CN107262664A (en) * | 2017-08-21 | 2017-10-20 | 马鞍山市三川机械制造有限公司 | A kind of Automobile flywheel shell moulding sand for casting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112605346A (en) * | 2020-11-30 | 2021-04-06 | 宝鸡石油机械有限责任公司 | Casting method of hook body for hook of lifting system of ultra-deep well petroleum drilling machine |
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