CN102699275A - Flaskless V-method casting process - Google Patents

Flaskless V-method casting process Download PDF

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Publication number
CN102699275A
CN102699275A CN2012101601410A CN201210160141A CN102699275A CN 102699275 A CN102699275 A CN 102699275A CN 2012101601410 A CN2012101601410 A CN 2012101601410A CN 201210160141 A CN201210160141 A CN 201210160141A CN 102699275 A CN102699275 A CN 102699275A
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CN
China
Prior art keywords
sand
casting
moulding frame
template
moulding
Prior art date
Application number
CN2012101601410A
Other languages
Chinese (zh)
Inventor
叶升平
张建满
周晓光
Original Assignee
华中科技大学
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 华中科技大学 filed Critical 华中科技大学
Priority to CN2012101601410A priority Critical patent/CN102699275A/en
Publication of CN102699275A publication Critical patent/CN102699275A/en

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Abstract

The invention discloses a flaskless V-method casting process, comprising the following steps of: respectively shaping to obtain an upper sand mould and a lower sand mould; closing the sand moulds; turning over the sand moulds; vertically casting and dismounting the sand moulds, wherein shaping processes of the upper sand mould and the lower sand mould are the same and comprise the following steps of: firstly, placing a shaping frame on a template and coating a film to tightly adhere a thin film on the surface of the template and the inner wall of the shaping frame; then filling sand, ramming and flatly shaving; then, covering a bottom plate capable of pumping gas on the shaping frame and vacuumizing by the bottom plate capable of pumping the gas so as to compactly cast; and finally, drawing and separating the shaping frame. Based on the traditional V-method process, the bottom plate capable of pumping the gas is used for replacing the gas pumping of the traditional sand box and thin film sealing is used for replacing the sealing effect of the sand box, thus saving the expensive manufacturing cost of the sand box; the flaskless V-method casting process has the advantages of simple configuration, convenience for maintenance, convenience for manufacturing and more flexibility in shaping; and meanwhile sand dropping is easier, more convenient and faster.

Description

No case V method casting technique
Technical field
The present invention relates to casting field, be specifically related to a kind of no case V method casting technique, be applicable to middle-size and small-size foundry goods.
Background technology
Vacuum sealed molding is as casting industry third generation formative method; With its aspect the moulding without binding agent; And the sand processing procedure simply waits significant advantage to obtain application more and more widely gradually; It can be cast the material kind and comprise cast iron, cast steel and all kinds of non-ferrous alloy, and the foundry goods size does not wait from several kilograms to tons up to a hundred yet.
But this casting technique, owing to keep mould strength by vacuum, the outbalance that seems of selecting for use that vacuumizes structure and other vacuum equipments of sandbox.Especially for some big foundry goods, the unreasonable regular meeting of sandbox structural design causes the problem of crush defective.Therefore, the design difficulty of sandbox and manufacturing cost make the application of vacuum sealed molding be restricted.
Summary of the invention
In order to overcome in the prior art because the design difficulty that sandbox causes height and the high problem of manufacturing cost the invention provides a kind of no case V method casting technique.
As shown in Figure 6, a kind of no case V method casting technique is specially: moulding obtains sand mold and following sand mold respectively, mould assembly, and mould turnover, vertical pouring is devaned, and obtains product; It is said that upward sand mold is identical with the formative technology of following sand mold; Be specially: at first the moulding frame is placed on the template, overlay film makes film be close to template surface and moulding frame inwall, back-up sand subsequently, ram-jolt and strickling then; Then on the moulding frame, add a cover the base plate of to bleed; Vacuumize through the base plate of bleeding, the consolidation casting mold, last molding also separates the moulding frame.
Further, said moulding frame has pattern draft.
Further, said moulding frame inner wall surface is smooth.
Further, said moulding frame adopts aluminium alloy or iron and steel.
Further, in order to guarantee yielding that sand mold produces in reasonable range, the side that the base plate of bleeding contacts with sand grains is processed with convexity.
Technique effect of the present invention is embodied in:
The present invention changes V method traditional design technology and covers film earlier, detains the moulding order of sandbox again, and the existing moulding frame that inwall is not had a structure of bleeding is buckled on the template, carries out coating processes again; Make film be close to template and moulding frame inwall, back-up sand ram-jolt is subsequently wipeed off, and the Gai Yike base plate of bleeding vacuumizes; The consolidation casting mold makes casting mold be close to the base plate of bleeding, and molding is also sloughed the moulding frame; So another half mould, mould assembly, vertical pouring have been made at same moulding platform.
The present invention uses for reference enlightening sand ray mode, adopts no case casting technique, is no longer dependent on the used sandbox that vacuumizes of traditional V method and keeps mould strength, has replaced bleeding of sandbox and sealing function respectively with the base plate of simply bleeding, film, finally keeps the intensity of casting mold.The reduction of the very big degree of the present invention the design and the manufacturing cost of sandbox, and considering on the existing circumscribed basis of film, adopt the mode of plane vertical pouring to expand the design of gating system free degree.The present invention has saved the expensive manufacturing cost of sandbox, and simple structure is easy to maintenance, is convenient to make, and is flexible more during moulding, and make knockout be more prone to, convenient, fast.
Description of drawings
Fig. 1 is the assembling sketch map of aspirating chamber and template among the present invention;
Fig. 2 is the assembling sketch map of aspirating chamber among the present invention, template and moulding frame;
Fig. 3 is a half mould moulding sketch map among the present invention;
Fig. 4 is the half mould sketch map of making before the preparation mould assembling among the present invention;
Fig. 5 is a mould assembling sketch map of the present invention;
Fig. 6 is technology overall flow figure of the present invention.
The specific embodiment
Below in conjunction with an instance the present invention is further described.
This instance is the casting instance of bucket tooth:
At first, template 5 is fixed in (template and aspirating chamber can be made integral body, also can be separation) on the aspirating chamber 1.The moulding frame can have certain pattern draft (general 8 ~ 10 degree); So that the detachable installation between moulding frame and the template is made loose piece with the running channel head portion in the template 5 during assembling, after the moulding frame places on the template 5; Fill out on the running channel top again and let live piece, and through locking hole 3 and 8 lockings.
Then, moulding frame 6 and aspirating chamber 1 are assembled together, aspirating chamber 1 is to be used to assist follow-up overlay film.The film contact because moulding frame 6 carries out dough making, so the surface of moulding frame should more smoothly be unlikely the scratch film, the moulding frame can be selected metal material for use, considers then preferred aluminium alloy of cost or iron and steel.This moment, the aspirating hole 2 through aspirating chamber vacuumized, and will invest on template 2 and the moulding frame 3 with the good film of preheating, simultaneously, left certain surplus (50-80mm) around the film.
Then, in template, add sand, vibration, the upper epidermis layer of sand is floating, after will have a function of bleeding the base plate 11 of bleeding be buckled in above the moulding frame 6, behind fastening the finishing, like Fig. 3.Good film surplus is counter to be affixed to around the flanging surplus 16 sealing with reserving in advance.
Secondly, on the moulding frame, add a cover the base plate of to bleed, guide pillar 9 and guide pin bushing 14 can be set accordingly, and lock through locking hole 7,12 in moulding frame and base plate edge with the location.Aspirating chamber 1 stops to vacuumize, and the aspirating hole 15 through the base plate 11 of bleeding vacuumizes the consolidation casting mold.Adopt manipulator clamping hanger 4,13 will illustrate the device upset in 3, separate aspirating chamber 1, template 2, moulding frame 3.Go up sand mold like this and finish with regard to making, following sand mold is made according to same method.
At last, mould assembly is about to arbitrary half mould horizontal positioned, puts into core 18 and the backstay 17 that is used for the location, and the result is as shown in Figure 4.Two half mould mould assembling (referring to Fig. 5) are fastening then, carry out vertical pouring through cast gate 19.After treating a period of time, remove vacuum, unpack.
When using other middle-size and small-size foundry goods such as casting liner plate of the present invention, backplate, method flow is identical, just the shape of template, aspirating chamber, moulding frame and the base plate of bleeding, vary in size, adjust according to the size of product.
Those skilled in the art will readily understand; The above is merely preferred embodiment of the present invention; Not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. no case V method casting technique is specially: moulding obtains sand mold and following sand mold, mould assembly, mould turnover respectively; Vertical pouring is devaned, and it is characterized in that, said upward sand mold is identical with the formative technology of following sand mold; Be specially: at first the moulding frame is placed on the template, overlay film makes film be close to template surface and moulding frame inwall then, and the base plate of can bleeding is then added a cover in back-up sand subsequently, ram-jolt and strickling on the moulding frame; Vacuumize through the base plate of bleeding, the consolidation casting mold, last molding also separates the moulding frame.
2. no case V method casting technique according to claim 1 is characterized in that said moulding frame has pattern draft.
3. no case V method casting technique according to claim 1 and 2 is characterized in that said moulding frame inner wall surface is smooth.
4. no case V method casting technique according to claim 1 and 2 is characterized in that, said moulding frame adopts aluminium alloy or iron and steel.
5. process according to claim 1 and 2 is characterized in that, the side that the said base plate of bleeding contacts with sand grains has convexity.
CN2012101601410A 2012-05-22 2012-05-22 Flaskless V-method casting process CN102699275A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2012101601410A CN102699275A (en) 2012-05-22 2012-05-22 Flaskless V-method casting process

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104801671A (en) * 2015-04-30 2015-07-29 柳州科尔特锻造机械有限公司 V-method casting process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1766587A1 (en) * 1990-04-10 1992-10-07 Центральный научно-исследовательский институт материалов Method for production of boxless moulds by vacuum moulding
CN101693282A (en) * 2009-10-22 2010-04-14 南阳市汇森精密仪器铸造有限公司 Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process
CN101823122A (en) * 2010-03-24 2010-09-08 河南省前卫实业有限公司 Negative-pressure molding process of casting refractory material product
CN102218505A (en) * 2011-07-08 2011-10-19 嘉禾县众合铸业有限公司 Precise casting technology for green sand vacuum sealing model

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1766587A1 (en) * 1990-04-10 1992-10-07 Центральный научно-исследовательский институт материалов Method for production of boxless moulds by vacuum moulding
CN101693282A (en) * 2009-10-22 2010-04-14 南阳市汇森精密仪器铸造有限公司 Method for producing voltage-bearing aluminum alloy tank body of ultra-high voltage switch by V-process
CN101823122A (en) * 2010-03-24 2010-09-08 河南省前卫实业有限公司 Negative-pressure molding process of casting refractory material product
CN102218505A (en) * 2011-07-08 2011-10-19 嘉禾县众合铸业有限公司 Precise casting technology for green sand vacuum sealing model

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
谢一华等: "《V法铸造生产及应用实例》", 31 January 2009, article "V法铸造" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104801671A (en) * 2015-04-30 2015-07-29 柳州科尔特锻造机械有限公司 V-method casting process

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Application publication date: 20121003

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