CN104874733A - Lost foam casting process - Google Patents
Lost foam casting process Download PDFInfo
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- CN104874733A CN104874733A CN201510225736.3A CN201510225736A CN104874733A CN 104874733 A CN104874733 A CN 104874733A CN 201510225736 A CN201510225736 A CN 201510225736A CN 104874733 A CN104874733 A CN 104874733A
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- sand
- casting
- dry sand
- lost foam
- dry
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Abstract
The invention relates to the technical field of casting, and particularly relates to a lost foam casting process. The lost foam casting process comprises the following steps: step 1. producing a foam plastic lost foam pattern by adopting polystyrene resin beads, combining a pouring system, brushing and spraying a special high-temperature resistant coating on the surface of a gasified pattern, and drying; step 2. arranging an interlayer sand box on a workbench, filling dry sand for compacting and leveling, placing the oven-dried gasified pattern on base sand, filling the dry sand, and carrying out micro-vibration for leveling a box mouth; step 3. covering by using a plastic film, placing a sprue cup, connecting a vacuum system for vacuum absorption, and pouring after fastening and molding the dry sand; and step 4. releasing vacuum, turning the box after a casting is condensed, and taking out the casting from the loose dry sand. According to the lost foam casting process disclosed by the invention, the process route design is reasonable, the surface smoothness and dimensional accuracy of the produced casting are high, the production working procedures are simple, the utilization rate of metal is high, all used sand is basically recycled, and the modelling cost is lowered.
Description
Technical field
The present invention relates to technical field of forging, be specifically related to a kind of lost foam casting process.
Background technology
Lost foam casting is the new technology of a kind of Near net shape, precise forming, and this technique is without the need to delivery, without die joint, without core, and thus foundry goods does not have overlap, burr and pattern draft, decreases the scale error caused due to core combination.。But in existing Technology of EPC, because technical flow design is coarse, cause the sealing of lost foam casting casting mold and intensity all undesirable.
Summary of the invention
For solving the above-mentioned problems in the prior art, the invention provides a kind of lost foam casting process.
Technique effect of the present invention is achieved through the following technical solutions:
A kind of lost foam casting process, comprises the following steps:
Step one: adopt polystyrene resin bead to make bubble and mould Bai Mo, combination casting system, at gasified pattern surface brush, spray speciality high-temperature resistant coating, dry, described polystyrene resin bead granular diameter 0.18mm, prefoam multiple is 40 times;
Step 2: be placed on workbench by interlayer sandbox, inserts dry sand jolt ramming, strikes off, and is put on bed load, fills up dry sand by the gasified pattern of oven dry, and micro-shaking strikes off case mouth, and described dry sand is drystone sand, and micro-time of shaking is 30 seconds;
Step 3: with covered rearing with plastic film, puts cup, connects vacuum system and inhales vacuum, dry sand fastening shaping after, pour into a mould, watering that rear casting mold holds time is 3 minutes, and cast temperature is higher than the temperature of sand casting 30 DEG C;
Step 4: release vacuum, mould turnover after foundry goods condensation, takes out foundry goods from loose dry sand.
The invention has the beneficial effects as follows:
A kind of lost foam casting process disclosed in this invention, Process Route Planning is reasonable, and surface finish of casting and the dimensional accuracy of production are high, and production process is simple, and using rate of metal is high, the basic fully recovering of old sand, and moulding cost reduces.
Detailed description of the invention
The present invention is realized by following detailed description of the invention:
A kind of lost foam casting process, comprises the following steps:
Step one: adopt polystyrene resin bead to make bubble and mould Bai Mo, combination casting system, at gasified pattern surface brush, spray speciality high-temperature resistant coating, dry, described polystyrene resin bead granular diameter 0.18mm, prefoam multiple is 40 times;
Step 2: be placed on workbench by interlayer sandbox, inserts dry sand jolt ramming, strikes off, and is put on bed load, fills up dry sand by the gasified pattern of oven dry, and micro-shaking strikes off case mouth, and described dry sand is drystone sand, and micro-time of shaking is 30 seconds;
Step 3: with covered rearing with plastic film, puts cup, connects vacuum system and inhales vacuum, dry sand fastening shaping after, pour into a mould, watering that rear casting mold holds time is 3 minutes, and cast temperature is higher than the temperature of sand casting 30 DEG C;
Step 4: release vacuum, mould turnover after foundry goods condensation, takes out foundry goods from loose dry sand.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a lost foam casting process, is characterized in that: comprise the following steps:
Step one: adopt polystyrene resin bead to make bubble and mould Bai Mo, combination casting system, at gasified pattern surface brush, spray speciality high-temperature resistant coating, dry, described polystyrene resin bead granular diameter 0.18mm, prefoam multiple is 40 times;
Step 2: be placed on workbench by interlayer sandbox, inserts dry sand jolt ramming, strikes off, and is put on bed load, fills up dry sand by the gasified pattern of oven dry, and micro-shaking strikes off case mouth, and described dry sand is drystone sand, and micro-time of shaking is 30 seconds;
Step 3: with covered rearing with plastic film, puts cup, connects vacuum system and inhales vacuum, dry sand fastening shaping after, pour into a mould, watering that rear casting mold holds time is 3 minutes, and cast temperature is higher than the temperature of sand casting 30 DEG C;
Step 4: release vacuum, mould turnover after foundry goods condensation, takes out foundry goods from loose dry sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510225736.3A CN104874733A (en) | 2015-05-06 | 2015-05-06 | Lost foam casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510225736.3A CN104874733A (en) | 2015-05-06 | 2015-05-06 | Lost foam casting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104874733A true CN104874733A (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510225736.3A Pending CN104874733A (en) | 2015-05-06 | 2015-05-06 | Lost foam casting process |
Country Status (1)
| Country | Link |
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| CN (1) | CN104874733A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734909A (en) * | 2016-12-19 | 2017-05-31 | 重庆市九明机械制造有限公司 | Lost foam casting process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006175492A (en) * | 2004-12-24 | 2006-07-06 | Mie Katan Kogyo Kk | Method for manufacturing casting with lost-foam pattern casting method |
| CN101417327A (en) * | 2007-10-24 | 2009-04-29 | 大连核心铸造技术工程研究所 | Vanishing die forging technique |
| CN102861871A (en) * | 2012-09-20 | 2013-01-09 | 长沙新安冶金机械制造有限公司 | Vacuum evaporative mold casting process of dry-type cylinder block |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
| CN103286262A (en) * | 2013-05-19 | 2013-09-11 | 岳阳凯达精铸制造有限公司 | Environmentally-friendly lost-foam casting process |
-
2015
- 2015-05-06 CN CN201510225736.3A patent/CN104874733A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006175492A (en) * | 2004-12-24 | 2006-07-06 | Mie Katan Kogyo Kk | Method for manufacturing casting with lost-foam pattern casting method |
| CN101417327A (en) * | 2007-10-24 | 2009-04-29 | 大连核心铸造技术工程研究所 | Vanishing die forging technique |
| CN102861871A (en) * | 2012-09-20 | 2013-01-09 | 长沙新安冶金机械制造有限公司 | Vacuum evaporative mold casting process of dry-type cylinder block |
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
| CN103286262A (en) * | 2013-05-19 | 2013-09-11 | 岳阳凯达精铸制造有限公司 | Environmentally-friendly lost-foam casting process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106734909A (en) * | 2016-12-19 | 2017-05-31 | 重庆市九明机械制造有限公司 | Lost foam casting process |
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Application publication date: 20150902 |