CN104874737A - Lost foam casting method - Google Patents
Lost foam casting method Download PDFInfo
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- CN104874737A CN104874737A CN201510278352.8A CN201510278352A CN104874737A CN 104874737 A CN104874737 A CN 104874737A CN 201510278352 A CN201510278352 A CN 201510278352A CN 104874737 A CN104874737 A CN 104874737A
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Abstract
The invention discloses a lost foam casting method which specifically includes the following steps: step 1: making a lost foam pattern; step 2: drying the prepared lost foam pattern; step 3: carrying out pattern repairing and model forming on the dried lost foam pattern to form a cluster model; step 4: coating the cluster model formed in the step 3; step 5: drying the cluster model coated in step 4; step 6: casting the cluster model obtained in step 5 to form an initial casting; step 7: polishing and painting the initial casting to form a final casting. According to the lost foam casting method provided by the invention, when the displacement between the liquid metal and the EPS cluster model is completed, a plastic film on the surface of a sand box is removed, and vacuum extraction is continued, so that the sand box does not collapse; the process is equivalent to crash handling for the casting, so that the residual stress in the casting is eliminated, and the mechanical properties of the casting are increased.
Description
Technical field
The invention belongs to casting method technical field, relate to a kind of lost-foam casting method.
Background technology
Traditional casting pattern major part is die model, but because its cost of manufacture is high, waste natural resources and the reason such as the process-cycle is long, people make improvements.Existing polystyrene (EPS) analogue formation, directly imbeds EPS model in sand mold at present, forms entity sand mold type molds, pouring molten iron in this solid mold, polystyrene burns, molten iron is full of the space occupied by polystyrene, forms the foundry goods identical with model after cooling.Its weak point is: first, and the free carbon richness produced after polystyrene burns is amassed and form carbon distribution on cast-internal or cast(ing) surface, causes finished surface to scrap because of carbon distribution defect; Secondly, form pigment finish leather owing to easily coming off in molten steel pouring course, cause foundry goods bark pocket, slag inclusion, scab etc. to be difficult to the casting flaw overcome; In addition, easily produce iron burnt-in sand, rise the defect such as case, distortion, and surface quality of continuous castings is poor relative to die model casting.
Summary of the invention
The object of this invention is to provide a kind of lost-foam casting method, the process-cycle is short, avoids the later stage carries out separately crash handling operation to foundry goods, solves the problem of the sandbox crush of the easy generation that existing lost-foam casting method exists.
The technical solution adopted in the present invention is, a kind of lost-foam casting method, specifically comprises the following steps:
Step 1: make bubble and mould Bai Mo;
Step 2: bubble step 1 made moulds Bai Mo dries;
Step 3: the bubble after step 2 being dried is moulded Bai Mo and carried out repairing a die and formation model bunch after group type;
Step 4: the painting of coating extension is carried out to the model cluster that step 3 is formed;
Step 5: the model cluster after being coated with is hung to step 4 coating and dries;
Step 6: the model cluster after drying step 5 is cast, and forms initial cast;
Step 7: the initial cast that step 6 is formed is polished and japanning, forms final foundry goods.
Feature of the present invention is also,
Step 1 is specifically implemented according to following steps:
Step 1.1: EPS bead is carried out prefoam;
Step 1.2: the EPS bead through step 1.1 prefoam is placed in slaking storehouse and carries out slaking;
Step 1.3: be filled in the die cavity of metal die by the EPS bead after step 1.2 slaking, heating, expands and mutually merges formation bubble and mould Bai Mo.
Bubble is moulded the concrete grammar that Bai Mo carries out drying by step 2:
First bubble is moulded Bai Mo and be placed in 3-5 days under room temperature, be then placed in drying room and carry out oven dry 3-5 days, the temperature of drying room is 20-50 DEG C, and humidity is not more than 50%.
In step 3, the bubble after oven dry is moulded when Bai Mo carries out group type and use the special sticklac of evaporative pattern and supporting sticklac rifle.
The temperature that step 5 is dried is 45-50 DEG C.
Step 6 is specifically implemented according to following steps:
Step 6.1: model cluster is put into the sandbox adding sand, and add sand and fix, add dry sand by adding sand device, and impose three-dimensional vibrating, make molding sand be full of each position of model;
Step 6.2: the sandbox surface plastic sheeting sealing of step 6.1 being equipped with model cluster, and sandbox inside is evacuated;
, there is the replacement process of liquid metals and EPS model cluster in step 6.3: the sandbox of liquid metals implantation step 6.2 is inner;
Step 6.4: after liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, in continuation extracting vacuum, to cast(ing) surface sclerosis, fully cools, mould turnover pickup, forms initial cast.
The sand device that adds in step 6.1 is that mechanical rocker-arm adds sand device.
The invention has the beneficial effects as follows: a kind of lost-foam casting method, in the plastic sheeting sealing of sandbox surface during casting, and sandbox inside is evacuated, by sand grains stick together, can ensure that casting-up process does not collapse loose; Machinery rocker-arm adds arranging of sand device can make sand avoid model by manual control, and model damages by the impulse force of the sand avoided; After liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, continue extracting vacuum, sandbox not crush can be made, this process is equivalent to carry out a crash handling to foundry goods, eliminate the residual stress in foundry goods, the institutional framework of foundry goods changes, and the mechanical performance of foundry goods strengthens.The operation of carrying out separately crash handling of traditional handicraft can be saved like this, but reach simultaneously traditional handicraft carry out Ageing Treatment after performance, its technique is simple, saved production cost.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in detail.
A kind of lost-foam casting method of the present invention, specifically comprises the following steps:
Step 1: make bubble and mould Bai Mo, specifically implement according to following steps:
Step 1.1: EPS bead is carried out prefoam;
Step 1.2: the EPS bead through step 1.1 prefoam is placed in slaking storehouse and carries out slaking, the time of slaking is 4-48 hour;
Step 1.3: the EPS bead after step 1.2 slaking is filled in the die cavity of metal die, heating, expands and mutually merges formation bubble and mould Bai Mo;
Step 2: bubble step 1 made moulds Bai Mo dries, and the concrete grammar of oven dry is: first bubble is moulded Bai Mo and be placed in 3-5 days under room temperature, be then placed in drying room and carry out oven dry 3-5 days, the temperature of drying room is 20-50 DEG C, and humidity is not more than 50%;
Step 3: the bubble after step 2 being dried is moulded Bai Mo and carried out repairing a die and formation model bunch after group type, uses the special sticklac of evaporative pattern and supporting sticklac rifle during group type;
Step 4: the painting of coating extension is carried out to the model cluster that step 3 is formed;
Step 5: hang the model cluster after being coated with to step 4 coating and dry, the temperature of oven dry is 45-50 DEG C;
Step 6: the model cluster after drying step 5 is cast, and forms initial cast;
Specifically implement according to following steps:
Step 6.1: model cluster is put into the sandbox adding sand, and add sand and fix, add sand device by mechanical rocker-arm and add dry sand, and impose three-dimensional vibrating, make molding sand be full of each position of model;
Step 6.2: the sandbox surface plastic sheeting sealing of step 6.1 being equipped with model cluster, and sandbox inside is evacuated;
, there is the replacement process of liquid metals and EPS model cluster in step 6.3: the sandbox of liquid metals implantation step 6.2 is inner;
Step 6.4: after liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, in continuation extracting vacuum, to cast(ing) surface sclerosis, fully cools, mould turnover pickup, forms initial cast;
Step 7: the initial cast that step 6 is formed is polished and japanning, forms final foundry goods.
A kind of lost-foam casting method of the present invention, in the plastic sheeting sealing of sandbox surface during casting, and is evacuated sandbox inside, by sand grains stick together, can ensure that casting-up process does not collapse loose; Machinery rocker-arm adds arranging of sand device can make sand avoid model by manual control, and model damages by the impulse force of the sand avoided; After liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, continue extracting vacuum, sandbox not crush can be made, this process is equivalent to carry out a crash handling to foundry goods, eliminate the residual stress in foundry goods, the institutional framework of foundry goods changes, and the mechanical performance of foundry goods strengthens.The operation of carrying out separately crash handling of traditional handicraft can be saved like this, but reach simultaneously traditional handicraft carry out Ageing Treatment after performance, its technique is simple, saved production cost.
Embodiment 1
Step 1: make bubble and mould Bai Mo, specifically implement according to following steps:
Step 1.1: EPS bead is carried out prefoam;
Step 1.2: the EPS bead through step 1.1 prefoam is placed in slaking storehouse and carries out slaking, the time of slaking is 4 hours;
Step 1.3: the EPS bead after step 1.2 slaking is filled in the die cavity of metal die, heating, expands and mutually merges formation bubble and mould Bai Mo;
Step 2: bubble step 1 made moulds Bai Mo dries, and the concrete grammar of oven dry is: first bubble is moulded Bai Mo and be placed in room temperature lower 3 days, be then placed in drying room and carry out oven dry 4 days, the temperature of drying room is 20 DEG C, and humidity is 10%;
Step 3: the bubble after step 2 being dried is moulded Bai Mo and carried out repairing a die and formation model bunch after group type, uses the special sticklac of evaporative pattern and supporting sticklac rifle during group type;
Step 4: the painting of coating extension is carried out to the model cluster that step 3 is formed;
Step 5: hang the model cluster after being coated with to step 4 coating and dry, the temperature of oven dry is 45 DEG C;
Step 6: the model cluster after drying step 5 is cast, and forms initial cast;
Specifically implement according to following steps:
Step 6.1: model cluster is put into the sandbox adding sand, and add sand and fix, add sand device by mechanical rocker-arm and add dry sand, and impose three-dimensional vibrating, make molding sand be full of each position of model;
Step 6.2: the sandbox surface plastic sheeting sealing of step 6.1 being equipped with model cluster, and sandbox inside is evacuated;
, there is the replacement process of liquid metals and EPS model cluster in step 6.3: the sandbox of liquid metals implantation step 6.2 is inner;
Step 6.4: after liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, in continuation extracting vacuum, to cast(ing) surface sclerosis, fully cools, mould turnover pickup, forms initial cast;
Step 7: the initial cast that step 6 is formed is polished and japanning, forms final foundry goods.
Embodiment 2
Step 1: make bubble and mould Bai Mo, specifically implement according to following steps:
Step 1.1: EPS bead is carried out prefoam;
Step 1.2: the EPS bead through step 1.1 prefoam is placed in slaking storehouse and carries out slaking, the time of slaking is 20 hours;
Step 1.3: the EPS bead after step 1.2 slaking is filled in the die cavity of metal die, heating, expands and mutually merges formation bubble and mould Bai Mo;
Step 2: bubble step 1 made moulds Bai Mo dries, and the concrete grammar of oven dry is: first bubble is moulded Bai Mo and be placed in room temperature lower 4 days, be then placed in drying room and carry out oven dry 5 days, the temperature of drying room is 30 DEG C, and humidity is 30%;
Step 3: the bubble after step 2 being dried is moulded Bai Mo and carried out repairing a die and formation model bunch after group type, uses the special sticklac of evaporative pattern and supporting sticklac rifle during group type;
Step 4: the painting of coating extension is carried out to the model cluster that step 3 is formed;
Step 5: hang the model cluster after being coated with to step 4 coating and dry, the temperature of oven dry is 47 DEG C;
Step 6: the model cluster after drying step 5 is cast, and forms initial cast;
Specifically implement according to following steps:
Step 6.1: model cluster is put into the sandbox adding sand, and add sand and fix, add sand device by mechanical rocker-arm and add dry sand, and impose three-dimensional vibrating, make molding sand be full of each position of model;
Step 6.2: the sandbox surface plastic sheeting sealing of step 6.1 being equipped with model cluster, and sandbox inside is evacuated;
, there is the replacement process of liquid metals and EPS model cluster in step 6.3: the sandbox of liquid metals implantation step 6.2 is inner;
Step 6.4: after liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, in continuation extracting vacuum, to cast(ing) surface sclerosis, fully cools, mould turnover pickup, forms initial cast;
Step 7: the initial cast that step 6 is formed is polished and japanning, forms final foundry goods.
Embodiment 3
Step 1: make bubble and mould Bai Mo, specifically implement according to following steps:
Step 1.1: EPS bead is carried out prefoam;
Step 1.2: the EPS bead through step 1.1 prefoam is placed in slaking storehouse and carries out slaking, the time of slaking is 48 hours;
Step 1.3: the EPS bead after step 1.2 slaking is filled in the die cavity of metal die, heating, expands and mutually merges formation bubble and mould Bai Mo;
Step 2: bubble step 1 made moulds Bai Mo dries, and the concrete grammar of oven dry is: first bubble is moulded Bai Mo and be placed in room temperature lower 5 days, be then placed in drying room and carry out oven dry 3 days, the temperature of drying room is 50 DEG C, and humidity is 50%;
Step 3: the bubble after step 2 being dried is moulded Bai Mo and carried out repairing a die and formation model bunch after group type, uses the special sticklac of evaporative pattern and supporting sticklac rifle during group type;
Step 4: the painting of coating extension is carried out to the model cluster that step 3 is formed;
Step 5: hang the model cluster after being coated with to step 4 coating and dry, the temperature of oven dry is 50 DEG C;
Step 6: the model cluster after drying step 5 is cast, and forms initial cast;
Specifically implement according to following steps:
Step 6.1: model cluster is put into the sandbox adding sand, and add sand and fix, add sand device by mechanical rocker-arm and add dry sand, and impose three-dimensional vibrating, make molding sand be full of each position of model;
Step 6.2: the sandbox surface plastic sheeting sealing of step 6.1 being equipped with model cluster, and sandbox inside is evacuated;
, there is the replacement process of liquid metals and EPS model cluster in step 6.3: the sandbox of liquid metals implantation step 6.2 is inner;
Step 6.4: after liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, in continuation extracting vacuum, to cast(ing) surface sclerosis, fully cools, mould turnover pickup, forms initial cast;
Step 7: the initial cast that step 6 is formed is polished and japanning, forms final foundry goods.
Claims (7)
1. a lost-foam casting method, is characterized in that, specifically comprises the following steps:
Step 1: make bubble and mould Bai Mo;
Step 2: described bubble step 1 made moulds Bai Mo dries;
Step 3: the bubble after step 2 being dried is moulded Bai Mo and carried out repairing a die and formation model bunch after group type;
Step 4: the painting of coating extension is carried out to the described model cluster that step 3 is formed;
Step 5: the model cluster after carrying out the painting of coating extension to step 4 is dried;
Step 6: the model cluster after drying step 5 is cast, and forms initial cast;
Step 7: the described initial cast that step 6 is formed is polished and japanning, forms final foundry goods.
2. a kind of lost-foam casting method according to claim 1, is characterized in that, described step 1 is specifically implemented according to following steps:
Step 1.1: EPS bead is carried out prefoam;
Step 1.2: the EPS bead through described step 1.1 prefoam is placed in slaking storehouse and carries out slaking, the time of slaking is 4-48 hour;
Step 1.3: be filled in the die cavity of metal die by the EPS bead after described step 1.2 slaking, heating, expands and mutually merges formation bubble and mould Bai Mo.
3. a kind of lost-foam casting method according to claim 1, is characterized in that, bubble is moulded the concrete grammar that Bai Mo carries out drying and is by described step 2:
First bubble is moulded Bai Mo and be placed in 3-5 days under room temperature, be then placed in drying room and carry out oven dry 3-5 days, the temperature of drying room is 20-50 DEG C, and humidity is not more than 50%.
4. a kind of lost-foam casting method according to claim 1, is characterized in that, moulds when Bai Mo carries out group type use the special sticklac of evaporative pattern and supporting sticklac rifle in described step 3 to the bubble after oven dry.
5. a kind of lost-foam casting method according to claim 1, is characterized in that, the temperature that described step 5 is dried is 45-50 DEG C.
6. a kind of lost-foam casting method according to claim 1, is characterized in that, described step 6 is specifically implemented according to following steps:
Step 6.1: model cluster is put into sandbox, and add sand and fix, add dry sand by adding sand device, and impose three-dimensional vibrating, make molding sand be full of each position of model;
Step 6.2: the sandbox surface plastic sheeting sealing of described step 6.1 being equipped with model cluster, and sandbox inside is evacuated;
Step 6.3: sandbox liquid metals being injected described step 6.2 is inner, and the replacement process of liquid metals and EPS model cluster occurs;
Step 6.4: after liquid metals and EPS model cluster have been replaced, open the plastic sheeting on sandbox surface, continues extracting vacuum, to cast(ing) surface sclerosis, fully cools, mould turnover pickup, forms initial cast.
7. a kind of lost-foam casting method according to claim 6, is characterized in that, the sand device that adds in described step 6.1 is that mechanical rocker-arm adds sand device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510278352.8A CN104874737A (en) | 2015-05-27 | 2015-05-27 | Lost foam casting method |
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| CN201510278352.8A CN104874737A (en) | 2015-05-27 | 2015-05-27 | Lost foam casting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108453218A (en) * | 2018-05-15 | 2018-08-28 | 芜湖新兴新材料产业园有限公司 | The mold and nut lost foam casting process of the foamed model of nut, the foamed model of system |
| CN109550900A (en) * | 2018-12-18 | 2019-04-02 | 汉中燕航精工机械有限公司 | A kind of casting technique of evaporative pattern |
| CN110102713A (en) * | 2019-05-31 | 2019-08-09 | 台州巨东精密铸造有限公司 | A kind of casting and pouring moulding process based on evaporative pattern |
| CN110252949A (en) * | 2019-07-11 | 2019-09-20 | 蓬莱万寿机械有限公司 | A kind of lost-foam casting method |
| CN110773701A (en) * | 2019-11-21 | 2020-02-11 | 安徽亚太锚链制造有限公司 | Special buckle casting method for recovering mooring anchor chain |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284228A (en) * | 1988-09-20 | 1990-03-26 | Mitsubishi Motors Corp | Expendable pattern casting method |
| CN101767186A (en) * | 2010-01-05 | 2010-07-07 | 河北冀凯铸业有限公司 | Method for preventing crush of lost foam casting product |
| CN102366818A (en) * | 2011-09-23 | 2012-03-07 | 无锡市凯杰铸造有限公司 | Lost foam casting method of casing of full-automatic lock for container |
| CN102717031A (en) * | 2012-07-02 | 2012-10-10 | 山西模范机械制造有限公司 | Large-scale thin-wall valve body lost foam casting process |
| CN103418747A (en) * | 2013-08-25 | 2013-12-04 | 阳城县华王通用离心铸管厂 | Lost foam casting process for double-bell-and-spigot grey cast iron thin wall pipe fittings and sand box for process |
-
2015
- 2015-05-27 CN CN201510278352.8A patent/CN104874737A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284228A (en) * | 1988-09-20 | 1990-03-26 | Mitsubishi Motors Corp | Expendable pattern casting method |
| CN101767186A (en) * | 2010-01-05 | 2010-07-07 | 河北冀凯铸业有限公司 | Method for preventing crush of lost foam casting product |
| CN102366818A (en) * | 2011-09-23 | 2012-03-07 | 无锡市凯杰铸造有限公司 | Lost foam casting method of casing of full-automatic lock for container |
| CN102717031A (en) * | 2012-07-02 | 2012-10-10 | 山西模范机械制造有限公司 | Large-scale thin-wall valve body lost foam casting process |
| CN103418747A (en) * | 2013-08-25 | 2013-12-04 | 阳城县华王通用离心铸管厂 | Lost foam casting process for double-bell-and-spigot grey cast iron thin wall pipe fittings and sand box for process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108453218A (en) * | 2018-05-15 | 2018-08-28 | 芜湖新兴新材料产业园有限公司 | The mold and nut lost foam casting process of the foamed model of nut, the foamed model of system |
| CN108453218B (en) * | 2018-05-15 | 2024-04-30 | 芜湖新兴新材料产业园有限公司 | Nut foam molding model, mold for manufacturing foam molding model and nut lost foam casting process |
| CN109550900A (en) * | 2018-12-18 | 2019-04-02 | 汉中燕航精工机械有限公司 | A kind of casting technique of evaporative pattern |
| CN110102713A (en) * | 2019-05-31 | 2019-08-09 | 台州巨东精密铸造有限公司 | A kind of casting and pouring moulding process based on evaporative pattern |
| CN110252949A (en) * | 2019-07-11 | 2019-09-20 | 蓬莱万寿机械有限公司 | A kind of lost-foam casting method |
| CN110773701A (en) * | 2019-11-21 | 2020-02-11 | 安徽亚太锚链制造有限公司 | Special buckle casting method for recovering mooring anchor chain |
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Application publication date: 20150902 |