CN111774530A - V-method molding process capable of casting propeller - Google Patents
V-method molding process capable of casting propeller Download PDFInfo
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- CN111774530A CN111774530A CN202010665301.1A CN202010665301A CN111774530A CN 111774530 A CN111774530 A CN 111774530A CN 202010665301 A CN202010665301 A CN 202010665301A CN 111774530 A CN111774530 A CN 111774530A
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- sand
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- 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
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
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- 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
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Abstract
The invention discloses a V-method molding process capable of casting a propeller, which comprises the following steps: (1) manufacturing a propeller mould: one propeller mould is divided into an upper mould box and a lower mould box which are respectively arranged in the negative pressure box, and a plurality of propellers can be arranged in one box according to the size of the propeller; (2) manufacturing a sand box: a filtering and air-extracting device is arranged in the sand box so as to be convenient for vacuumizing after the molding sand falls into the sand box; (3) modeling; (4) pouring: the propeller is a steel casting, and needs to be vacuumized while the sand box is poured, the vacuum degree is kept between-0.6 and-0.7 Mpa, and the vacuumized pressure is kept unchanged for 5 minutes after pouring. The invention discloses a V-method molding process capable of casting a propeller, which uses a V method to replace the traditional resin sand molding to produce the propeller, and the V-method molding process uses single dry sand as molding sand, does not add water, adhesive and additives, and can recycle the molding sand.
Description
Technical Field
The invention belongs to the field of propeller casting, and particularly relates to a V-method molding process capable of casting a propeller in the field.
Background
At present, the propeller is produced by using a resin sand molding process, the resin sand molding process is to mold mixed self-hardening sand formed by adding resin and a curing agent into molding sand, the resin and the curing agent are chemical agents, the resin and the curing agent can cause harm to a human body after being contacted for a long time, and meanwhile, the recovery rate of the mixed sand after molding is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a V-method molding process capable of casting a propeller.
The invention adopts the following technical scheme:
the improvement of a V-method molding process for a castable propeller, which comprises the following steps:
(1) manufacturing a propeller mould: one propeller mould is divided into an upper mould box and a lower mould box which are respectively arranged in the negative pressure box, and a plurality of propellers can be arranged in one box according to the size of the propeller;
(2) manufacturing a sand box: a filtering and air-extracting device is arranged in the sand box so as to be convenient for vacuumizing after the molding sand falls into the sand box;
(3) modeling: forming a closed propeller cavity in the sand box by using the processed molding sand through a vibrating compaction and vacuumizing process, wherein the process flow comprises the following steps: respectively placing the upper negative pressure box and the lower negative pressure box on a compaction table, moving the compaction table to transfer the negative pressure boxes to a film coating station, coating a film on the negative pressure box, moving the compaction table to transfer the negative pressure box to a spraying station, spraying the negative pressure box coated with the film, then a manipulator or a manual work buckles the empty box, then the compaction table is moved to transfer the negative pressure box to a coating drying station, the coating on the negative pressure box is dried, the drying and the film covering can be separated from each other, the compaction table is transferred to a sand adding station, a rain sand adding switch is turned on, and the compaction table vibrates at the same time, filling the sand box with molding sand and compacting, moving the compacting table to a stripping station, manually scraping the back-coating film, forming a closed space consisting of the sand box and the film in the sand box, vacuumizing, drawing a mold by a manipulator, turning the mold, placing the mold on a mold closing flat car, and moving a sand box to a pouring position to wait for pouring;
(4) pouring: the propeller is a steel casting, and needs to be vacuumized while the sand box is poured, the vacuum degree is kept between-0.6 and-0.7 Mpa, and the vacuumized pressure is kept unchanged for 5 minutes after pouring.
Further, the casting is moved out after the casting in the step (4), the casting sand after casting is subjected to deslagging and cooling through sand treatment equipment and then is recycled, and the process flow is as follows: the casting sand box after pouring is hoisted to a box disassembling room, the molding sand and the casting fall onto a shakeout grid, the casting sand box is placed on a return empty box roller way, the molding sand falls onto a proportional valve through a shakeout hopper, then the hot sand is conveyed to a plate chain lifting machine through a vibrating conveying sand screening machine, then the hot sand enters a sand temperature regulator or a boiling cooling bed for cooling, then the cooled molding sand is lifted to a belt conveyor through the belt lifting machine, the belt conveyor is placed above a molding sand warehouse, and the molding sand on the belt conveyor falls into the molding sand warehouse through a plow discharger uniformly.
Furthermore, the V-method molding line of the V-method molding process comprises a pneumatic control system, a hydraulic system, a vacuum system, a dust removal system, an electric control system and a water control system.
The invention has the beneficial effects that:
the invention discloses a V-method molding process capable of casting propellers, which uses a V method to replace the traditional resin sand molding to produce the propellers, the V-method molding process uses single dry sand as molding sand, water, adhesive and additives are not added, the molding sand can be recycled, the investment of customers is reduced, no environmental pollution is caused in the production process, and the labor environment of workers is improved. The V-method molding process has high production efficiency, and the surface precision of the cast propeller casting is high.
Drawings
FIG. 1 is a schematic structural view of a dust removal system and a pneumatic control system of a V-method molding line in the V-method molding process disclosed in embodiment 1 of the present invention;
FIG. 2 is a schematic view showing a vacuum system structure of a V-method molding line in the V-method molding process disclosed in example 1 of the present invention;
fig. 3 is a schematic structural view of a water control system of a V-process molding line in the V-process molding process disclosed in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The V-method moulding is also called negative pressure moulding, and is a new moulding process, and is a special casting method for obtaining casting by using single dry sand (without adding water, adhesive and additive) as moulding sand, heating plastic film, then coating film on the mould with air hole and air-extracting device, sealing sand box, and pumping out air from mould by means of vacuum pump to make the pressure difference between internal and external of mould compact the dry sand so as to form required mould cavity to make metal liquor pouring.
(1) manufacturing a propeller mould: one propeller mould is divided into an upper mould box and a lower mould box which are respectively arranged in the negative pressure box, and a plurality of propellers can be arranged in one box according to the size of the propeller;
(2) manufacturing a sand box: a filtering and air-extracting device is arranged in the sand box so as to be convenient for vacuumizing after the molding sand falls into the sand box;
(3) modeling: forming a closed propeller cavity in the sand box by using the processed molding sand through a vibrating compaction and vacuumizing process, wherein the process flow comprises the following steps: respectively placing the upper negative pressure box and the lower negative pressure box on a compaction table, moving the compaction table to transfer the negative pressure boxes to a film coating station, coating a film on the negative pressure box, moving the compaction table to transfer the negative pressure box to a spraying station, spraying the negative pressure box coated with the film, then a manipulator or a manual work buckles the empty box, then the compaction table is moved to transfer the negative pressure box to a coating drying station, the coating on the negative pressure box is dried, the drying and the film covering can be separated from each other, the compaction table is transferred to a sand adding station, a rain sand adding switch is turned on, and the compaction table vibrates at the same time, filling the sand box with molding sand and compacting, moving the compacting table to a stripping station, manually scraping the back-coating film, forming a closed space consisting of the sand box and the film in the sand box, vacuumizing, drawing a mold by a manipulator, turning the mold, placing the mold on a mold closing flat car, and moving a sand box to a pouring position to wait for pouring;
(4) pouring: the propeller is a steel casting, and needs to be vacuumized while the sand box is poured, the vacuum degree is kept between-0.6 and-0.7 Mpa, and the vacuumized pressure is kept unchanged for 5 minutes after pouring.
And (4) removing the casting after pouring in the step (4), and recycling the poured molding sand after deslagging and cooling through sand treatment equipment, wherein the process flow is as follows: the casting sand box after pouring is hoisted to a box disassembling room, the molding sand and the casting fall onto a shakeout grid, the casting sand box is placed on a return empty box roller way, the molding sand falls onto a proportional valve through a shakeout hopper, then the hot sand is conveyed to a plate chain lifting machine through a vibrating conveying sand screening machine, then the hot sand enters a sand temperature regulator or a boiling cooling bed for cooling, then the cooled molding sand is lifted to a belt conveyor through the belt lifting machine, the belt conveyor is placed above a molding sand warehouse, and the molding sand on the belt conveyor falls into the molding sand warehouse through a plow discharger uniformly.
The V-method molding line of the V-method molding process comprises a pneumatic control system, a hydraulic system, a vacuum system, a dust removal system, an electric control system and a water control system. Fig. 1 is a schematic structural diagram of a dust removal system 1 and an air control system 2, fig. 2 is a schematic structural diagram of a vacuum system 3, and fig. 3 is a schematic structural diagram of a water control system 4.
The propeller casting method is characterized in that a V-method molding process is utilized to produce the cast propeller, a propeller mould is divided into an upper part and a lower part, a plurality of propellers can be produced in one box according to the size of the propeller, and then the propeller is produced by utilizing the V-method casting process. The propeller is a steel casting, the pressure during V-process pouring is-0.6 to-0.7 Mpa, the pressure maintaining time is 5 minutes, and the efficiency of casting the propeller by the V-process can reach 4 boxes per hour. And the V-method molding is performed by using dry sand, does not contain any chemical agent, and the recovery rate of molding sand can reach 99%.
Claims (3)
1. A V-method molding process for a castable propeller is characterized by comprising the following steps:
(1) manufacturing a propeller mould: one propeller mould is divided into an upper mould box and a lower mould box which are respectively arranged in the negative pressure box, and a plurality of propellers can be arranged in one box according to the size of the propeller;
(2) manufacturing a sand box: a filtering and air-extracting device is arranged in the sand box so as to be convenient for vacuumizing after the molding sand falls into the sand box;
(3) modeling: forming a closed propeller cavity in the sand box by using the processed molding sand through a vibrating compaction and vacuumizing process, wherein the process flow comprises the following steps: respectively placing the upper negative pressure box and the lower negative pressure box on a compaction table, moving the compaction table to transfer the negative pressure boxes to a film coating station, coating a film on the negative pressure box, moving the compaction table to transfer the negative pressure box to a spraying station, spraying the negative pressure box coated with the film, then a manipulator or a manual work buckles the empty box, then the compaction table is moved to transfer the negative pressure box to a coating drying station, the coating on the negative pressure box is dried, the drying and the film covering can be separated from each other, the compaction table is transferred to a sand adding station, a rain sand adding switch is turned on, and the compaction table vibrates at the same time, filling the sand box with molding sand and compacting, moving the compacting table to a stripping station, manually scraping the back-coating film, forming a closed space consisting of the sand box and the film in the sand box, vacuumizing, drawing a mold by a manipulator, turning the mold, placing the mold on a mold closing flat car, and moving a sand box to a pouring position to wait for pouring;
(4) pouring: the propeller is a steel casting, and needs to be vacuumized while the sand box is poured, the vacuum degree is kept between-0.6 and-0.7 Mpa, and the vacuumized pressure is kept unchanged for 5 minutes after pouring.
2. The V-process modeling process of a castable propeller of claim 1, wherein: and (4) removing the casting after pouring in the step (4), and recycling the poured molding sand after deslagging and cooling through sand treatment equipment, wherein the process flow is as follows: the casting sand box after pouring is hoisted to a box disassembling room, the molding sand and the casting fall onto a shakeout grid, the casting sand box is placed on a return empty box roller way, the molding sand falls onto a proportional valve through a shakeout hopper, then the hot sand is conveyed to a plate chain lifting machine through a vibrating conveying sand screening machine, then the hot sand enters a sand temperature regulator or a boiling cooling bed for cooling, then the cooled molding sand is lifted to a belt conveyor through the belt lifting machine, the belt conveyor is placed above a molding sand warehouse, and the molding sand on the belt conveyor falls into the molding sand warehouse through a plow discharger uniformly.
3. The V-process modeling process of a castable propeller of claim 1, wherein: the V-method molding line of the V-method molding process comprises a pneumatic control system, a hydraulic system, a vacuum system, a dust removal system, an electric control system and a water control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010665301.1A CN111774530A (en) | 2020-07-11 | 2020-07-11 | V-method molding process capable of casting propeller |
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| CN202010665301.1A CN111774530A (en) | 2020-07-11 | 2020-07-11 | V-method molding process capable of casting propeller |
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| CN111774530A true CN111774530A (en) | 2020-10-16 |
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| CN202010665301.1A Pending CN111774530A (en) | 2020-07-11 | 2020-07-11 | V-method molding process capable of casting propeller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145800A (en) * | 2021-04-28 | 2021-07-23 | 石家庄工业泵厂有限公司 | Composite casting process of slurry pump impeller |
| CN114700459A (en) * | 2022-03-21 | 2022-07-05 | 陈攀 | Method for accelerating paint drying by using residual heat of V-normal molding sand |
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| JPS6478655A (en) * | 1987-09-19 | 1989-03-24 | Nissan Motor | Full mold molding method |
| CN101786140A (en) * | 2009-11-30 | 2010-07-28 | 中国汽车工业工程公司 | V-method modeling secondary sand adding, scraping, sweeping and film coating process and device |
| 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 |
| CN204449206U (en) * | 2014-12-31 | 2015-07-08 | 青岛盛美机械有限公司 | A kind of simple and easy V method production line |
| JP2018024008A (en) * | 2016-08-12 | 2018-02-15 | 株式会社アクティ | Pair of casting molds and manufacturing method thereof |
| CN110170615A (en) * | 2019-07-05 | 2019-08-27 | 青岛盛美机械有限公司 | A kind of F shape moulding line, production method and V method casting method |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6478655A (en) * | 1987-09-19 | 1989-03-24 | Nissan Motor | Full mold molding method |
| CN101786140A (en) * | 2009-11-30 | 2010-07-28 | 中国汽车工业工程公司 | V-method modeling secondary sand adding, scraping, sweeping and film coating process and device |
| 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 |
| CN204449206U (en) * | 2014-12-31 | 2015-07-08 | 青岛盛美机械有限公司 | A kind of simple and easy V method production line |
| JP2018024008A (en) * | 2016-08-12 | 2018-02-15 | 株式会社アクティ | Pair of casting molds and manufacturing method thereof |
| CN110170615A (en) * | 2019-07-05 | 2019-08-27 | 青岛盛美机械有限公司 | A kind of F shape moulding line, production method and V method casting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145800A (en) * | 2021-04-28 | 2021-07-23 | 石家庄工业泵厂有限公司 | Composite casting process of slurry pump impeller |
| CN114700459A (en) * | 2022-03-21 | 2022-07-05 | 陈攀 | Method for accelerating paint drying by using residual heat of V-normal molding sand |
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Application publication date: 20201016 |
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