CN104942227B - V-method vacuum-forming method for side-concave heavy casting sand mold - Google Patents
V-method vacuum-forming method for side-concave heavy casting sand mold Download PDFInfo
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- CN104942227B CN104942227B CN201510413019.3A CN201510413019A CN104942227B CN 104942227 B CN104942227 B CN 104942227B CN 201510413019 A CN201510413019 A CN 201510413019A CN 104942227 B CN104942227 B CN 104942227B
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- sand
- mold
- sand mold
- sandbox
- forming method
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- 239000004576 sand Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005266 casting Methods 0.000 title claims abstract description 19
- 238000007666 vacuum forming Methods 0.000 title abstract 4
- 244000035744 Hura crepitans Species 0.000 claims abstract description 22
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- -1 Vibration Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 239000013039 cover film Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Landscapes
- Casting Devices For Molds (AREA)
Abstract
The invention discloses a V-method vacuum-forming method for a side-concave heavy casting sand mold. The V-method vacuum-forming method comprises the steps that a mold is hung and arranged on a vibrating table flatcar, covered with an EVA forming film and sprayed with a coating; a sand box is hung and arranged on the vibrating table flatcar to cover the mold, an air nozzle of a blowing gun is aligned to the concave portion of the side wall of the mold, and a sand inlet formed in the top of the sand box is aligned to the position under a drench sand-adding device to enable the blowing gun to be connected with an air compressor; sand adding is performed, vibration and blowing are performed simultaneously to enable a part of fallen sand to be horizontally blown, ejected and sent to the concave portion, meanwhile a whole cavity is full of the fallen sand under the gravity effect from top to bottom, finally sand adding, vibration and blowing are stopped simultaneously to obtain a preliminary mold; the vibrating table flatcar is driven out, a PE cover film is arranged at the top of the sand box, negative-pressure vacuum pumping is performed to enable the mold to be full through suction, and the mold is taken out to obtain the cavity meeting the technical requirements. The whole surface of the cavity manufactured by means of the V-method vacuum-forming method is smooth and flat, and castings cast by means of the mold are reliable in quality.
Description
Technical field
The present invention relates to a kind of sand mold preparation method, particularly a kind of for have side recessed or indent heavy castings sand mold
V method vacuo-forming method, can be used for preparing large-sized speed-changing cabinet base sand mold it can also be used to preparation has side recessed or concave inward structure
Other heavy castings sand molds.
Background technology
When manufacturing large-sized speed-changing cabinet base, the industry all runs into a unsolved problem till now: big
There is an indent position, in traditional preparation process, when making sand mold for it on type gearbox body base (sole position) side
To enrich sand mold frequently with automatic shakeout, but sand is only subject to action of gravity it is impossible to horizontally enter into during falling from top to bottom
The female parts of model are filled with.Even if being shaken from different perspectives using three-dimensional vibration mode on vibration flatcar, still not
Enable the filling of concave surface.
In order to solve this problem, typically all to complete the preparation of concave surface sand mold using artificial plug sand.But filled in artificial
There is following weak point in the mode of sand:
1st, first add most of sand at raining-type sand filling mouth in sandbox, then vibration table flatcar is moved, ability
Concave surface is manually filled in sand, side vibration frontier fortress sand, after completing to fill in sand, but vibration table flatcar is moved to plus sand mouth at fill it up with again
Sand, operation seems loaded down with trivial details repetition, wastes time and energy；
2nd, during artificial plug sand, easily coating is rubbed off, lead to foundry goods scab serious, poor surface smoothness and sand removal is stranded
Difficult；
3rd, secondary vibration cannot be realized after plug sand, the sand degree of packing on sandbox top is poor, easy crush during cast；
4th, the concave surface degree of packing of plug sand is uneven, and swollen bag, surface irregularity easily in foundry goods, and physical dimension can not obtain
Ensure, weight is overweight, levels difficulty, has had a strong impact on product quality；
5th, the v method new life producing line that in June, 2014 introduces is put into serial production, because new line adopts plc computerized control system, again
Cannot be carried out manually filling in sand, thus the idleness of equipment is it is impossible to produce.Therefore, our company, through the repetition test of 9 wheat harvesting periods, changes
Multiple methods, consume substantial amounts of human and material resources, financial resources, finally test successfully in March, 2015.
Content of the invention
The goal of the invention of the present invention be to provide a kind of for having side recessed or the v method vacuum of heavy castings sand mold of indent is made
Type method, can be used for preparing the large-sized speed-changing cabinet base sand mold described in background technology it can also be used to preparation has side recessed or interior
Other heavy castings sand molds of recessed structure.The inventive method solves that side is recessed or the filling of the heavy castings sand mold level of indent is asked
Topic, no longer fills in sand mode using artificial, and during section, energy-conservation, section are artificial and physical dimension of foundry goods can be guaranteed, and appearance is bright and clean
Spend, reliable in quality.
The technical solution used in the present invention is such that
A kind of v method vacuo-forming method for there being the recessed heavy castings sand mold in side, comprises the following steps:
The first step, model is hung onto on vibration table flatcar, one layer of eva shaping membrane is covered to model outer surface and sprays
Material；
Second step, the sandbox installing air blow gun is hung onto model is covered on vibration table flatcar, the air nozzle of air blow gun
At recess on Alignment model side wall in the way of tilting upward；
3rd step, start the vibration table flatcar after combination make the sand inlet at sandbox top be aligned sand adding device just under
Side, air blow gun is connected with air compressor machine；
4th step, by sand adding device to sandbox plus sand, plus sand during in vibration while blow, make part knockout
Not only horizontal blow, push up and deliver at recess, knockout fills up whole die cavity from top to bottom under gravity simultaneously, finally plus sand, vibration,
Blow and stop simultaneously, obtain one-time formed preliminary sand mold；
5th step, output vibration table flatcar, put up pe coverlay at sandbox top, open negative-pressure vacuum, sand mold is inhaled real；
6th step, the dead head of process sand mold, then the sand mold one of sandbox and its inside is lifted on turnover machine frame, by mould
Type takes out, and just can quickly obtain complete die cavity.A kind of for having side recessed or the sand mold of indent just completes.
It is preferred that, the sand mold die cavity that the 6th step is obtained carries out quality examination.
It is preferred that, the supporting sand mold for same heavy castings manufacture is combined, mould assembling, lock box, wait
Cast.
Above-mentioned two preferred steps are that sand mold is used further, and for being cast with, side is recessed or the Big Steel Castings of indent
Part.
It is preferred that, the acclivitous angle of described air blow gun is 30 degree.Certainly, the angle of inclination of air blow gun does not limit
In 30 degree, depending on the determination at angle of inclination is mainly according to the air nozzle position of air blow gun.
In the methods of the invention, there are 3 very prominent innovative points:
1st, in sand mold preparation process, using air blow gun, the recess of model is blown.Before this, lead in this technology
Never to occur using this means in domain, for manufacture have side recessed or concave inward structure foundry goods, still belong to the first time.Using blowing
Air gun blows the vibration that barotropic gas combines vibration table flatcar, can upset the frictional property between knockout, increases the self-sliping of knockout
And mobility, thus realizing the translation of knockout, effectively can blow horizontal for knockout, push up and deliver at the recess of model, knockout simultaneously
Fill up die cavity from top to bottom under gravity.Plus sand, vibration, blowing stops, and opens negative-pressure vacuum, sand mold is inhaled real simultaneously,
Take out model, just can quickly obtain the complete die cavity meeting technical requirements, greatly more time saving and energy saving than original craft plug sand；
2nd, the die cavity being manufactured using the method is smooth in recessed, the interior recess in side and whole surface, need not carry out again
Repair, its physical dimension of the foundry goods pouring into a mould out with such die cavity is guaranteed, reliable in quality, and surface smoothness is good, clearly
Reason gets up to be convenient to；
3rd, in the past during preparing sand mold, need repeatedly to drive vibration table flatcar into using artificial plug sand in interior recess
Output, bother very much, take, consume energy, consume manually, after the inventive method, be not required to repeatedly drive into and output, save operation
Step, solve time-consuming, power consumption, consumption human problems.
Brief description
Fig. 1 is the schematic diagram of preparation process of the present invention.
In figure labelling:
1 is sand adding device, and 2a is eva shaping membrane, and 2b is pe coverlay, and 3 is sandbox, and 4 is air blow gun, and 5 is model,
6 is vacuum gas tank, and 7 is vibration table flatcar；
3-1 is sand inlet；A is recess.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
Embodiment:
A kind of v method vacuo-forming method for there being the recessed heavy castings sand mold in side, comprises the following steps:
The first step, model 5 is hung onto on vibration table flatcar 7, one layer of eva shaping membrane 2a is covered to model outer surface and sprays
Coating；
Second step, the sandbox 3 installing air blow gun 4 is hung onto model 5 is covered on vibration table flatcar 7, the spray of air blow gun 4
At recess a on valve Alignment model 5 side wall in the way of tilting upward；
3rd step, start the vibration table flatcar 7 after combination and make the sand inlet 3-1 at sandbox 3 top be directed at sand adding device 1
Underface, air blow gun 4 is connected with air compressor machine；
4th step, by sand adding device 1 to sandbox 3 plus sand, plus sand during in vibration while blows, make partly to fall
Sand not only horizontal blow and push up deliver at recess a, knockout fills up whole die cavity from top to bottom under gravity simultaneously, finally plus
Sand, vibration, air blowing stop simultaneously, obtain one-time formed preliminary sand mold；
5th step, output vibration table flatcar 7, put up pe coverlay 2b at sandbox 3 top, open negative-pressure vacuum, by sand mold
Inhale real；
6th step, the dead head of process sand mold, then the sand mold one of sandbox 3 and its inside is lifted on turnover machine frame, will
Model 5 takes out, and obtains complete die cavity；
7th step, the sand mold die cavity that the 6th step is obtained carries out quality examination.
8th step, the supporting sand mold for same heavy castings manufacture is combined, mould assembling, lock box, wait to be cast.
In the present embodiment, the acclivitous angle of described air blow gun 4 is 30 degree.
The foregoing is only the preferable case study on implementation of the present invention, not in order to limit the present invention, all the present invention's
Any modification, equivalent and improvement made within spirit and principle etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of v method vacuo-forming method for there being the recessed heavy castings sand mold in side is it is characterised in that comprise the following steps:
The first step, model (5) is hung onto on vibration table flatcar (7), model outer surface is covered one layer of eva shaping membrane (2a) and
Spray paint；
Second step, the sandbox (3) installing air blow gun (4) is hung onto model (5), air blow gun are covered on vibration table flatcar (7)
(4) recess (a) place on air nozzle Alignment model (5) side wall in the way of tilting upward, and by sandbox (3) and vacuum gas tank
(6) connect；
3rd step, start the vibration table flatcar (7) after combination and make the sand inlet (3-1) at sandbox (3) top be directed at raining-type sand filling dress
Put immediately below (1), air blow gun (4) is connected with air compressor machine；
4th step, by sand adding device (1) to sandbox (3) plus sand, plus sand during in vibration while blows, make partly to fall
Sand is not only horizontal to be blown, pushes up and deliver to recess (a) place, and knockout fills up whole die cavity from top to bottom under gravity simultaneously, finally plus sand,
Vibration, air blowing stop simultaneously, have just obtained one-time formed preliminary sand mold；
5th step, output vibration table flatcar (7), put up pe coverlay (2b) at sandbox (3) top, open negative-pressure vacuum, by sand
Type is inhaled real；
6th step, the dead head of process sand mold, then the sand mold one of sandbox (3) and its inside is lifted on turnover machine frame, by mould
Type (5) takes out, and has just obtained complete die cavity.
2. a kind of v method vacuo-forming method for there being the recessed heavy castings sand mold in side according to claim 1, its feature
It is: the sand mold die cavity that the 6th step is obtained carries out quality examination.
3. a kind of v method vacuo-forming method for there being the recessed heavy castings sand mold in side according to claim 1 and 2, its
Be characterised by: the supporting sand mold for same heavy castings manufacture is combined, mould assembling, lock box, wait to be cast.
4. a kind of v method vacuo-forming method for there being the recessed heavy castings sand mold in side according to claim 1, its feature
It is: the acclivitous angle of described air blow gun (4) is 30 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413019.3A CN104942227B (en) | 2015-07-15 | 2015-07-15 | V-method vacuum-forming method for side-concave heavy casting sand mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413019.3A CN104942227B (en) | 2015-07-15 | 2015-07-15 | V-method vacuum-forming method for side-concave heavy casting sand mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104942227A CN104942227A (en) | 2015-09-30 |
| CN104942227B true CN104942227B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510413019.3A Expired - Fee Related CN104942227B (en) | 2015-07-15 | 2015-07-15 | V-method vacuum-forming method for side-concave heavy casting sand mold |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107414026A (en) * | 2017-08-16 | 2017-12-01 | 四川省井研卫东机械制造厂 | Using the vacuo-forming of V methods and the casting sand mold preparation method of phenolic sand molding combination process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62101348A (en) * | 1985-10-26 | 1987-05-11 | Daido Steel Co Ltd | Vacuum casting mold |
| WO2006067990A1 (en) * | 2004-12-24 | 2006-06-29 | Sintokogio, Ltd. | Process for producing cast metal according to evaporative pattern casting |
| CN102228955A (en) * | 2011-07-01 | 2011-11-02 | 李复旺 | Treatment method for deformation of massive lost foam |
| CN103212667A (en) * | 2013-03-26 | 2013-07-24 | 山东蒙凌工程机械股份有限公司 | Production process for casting gearbox housing by using V method, and V-method mold |
| CN104117632A (en) * | 2014-07-07 | 2014-10-29 | 宁夏共享装备有限公司 | Casting technology for prevention of sand bonding of construction hole position during full mold process |
| CN104624961A (en) * | 2013-11-12 | 2015-05-20 | 青岛大运机械有限公司 | Method for improving non-solid sand filling of upper concave surface on evaporative pattern casting |
-
2015
- 2015-07-15 CN CN201510413019.3A patent/CN104942227B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62101348A (en) * | 1985-10-26 | 1987-05-11 | Daido Steel Co Ltd | Vacuum casting mold |
| WO2006067990A1 (en) * | 2004-12-24 | 2006-06-29 | Sintokogio, Ltd. | Process for producing cast metal according to evaporative pattern casting |
| CN102228955A (en) * | 2011-07-01 | 2011-11-02 | 李复旺 | Treatment method for deformation of massive lost foam |
| CN103212667A (en) * | 2013-03-26 | 2013-07-24 | 山东蒙凌工程机械股份有限公司 | Production process for casting gearbox housing by using V method, and V-method mold |
| CN104624961A (en) * | 2013-11-12 | 2015-05-20 | 青岛大运机械有限公司 | Method for improving non-solid sand filling of upper concave surface on evaporative pattern casting |
| CN104117632A (en) * | 2014-07-07 | 2014-10-29 | 宁夏共享装备有限公司 | Casting technology for prevention of sand bonding of construction hole position during full mold process |
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| Publication number | Publication date |
|---|---|
| CN104942227A (en) | 2015-09-30 |
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Granted publication date: 20170125 |