CN103658532A - Method for making plastic foam die by using foamed plastic sheet in casting process - Google Patents
Method for making plastic foam die by using foamed plastic sheet in casting process Download PDFInfo
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- CN103658532A CN103658532A CN201310641657.1A CN201310641657A CN103658532A CN 103658532 A CN103658532 A CN 103658532A CN 201310641657 A CN201310641657 A CN 201310641657A CN 103658532 A CN103658532 A CN 103658532A
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- plastic foam
- foam mould
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- foam die
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Abstract
A method for making a plastic foam die by using a foamed plastic sheet in a casting process mainly comprises the steps of blanking, cutting, bonding, repairing, pre-drying and coating. A liquid plastic foaming agent is used to repair cracks, unfilled corners and pits generated in the above bonding steps, a plastic foam die is put in a drying room after the temperature of the drying room reaches 40-45DEG C, and is pre-dried for 18-24h for removing water in the plastic foam die, the plastic foam die is coated in 40-45DEG C environment and then is dried for 4-5h, and then the plastic foam die is coated again. The method eliminates the defects of cracks, unfilled corners and pits generated in making process of the plastic foam die from the foamed plastic sheet, improves the qualified rate of the plastic foam die, improves the quality of casted products, is simple and is easy to operate.
Description
Technical field
The invention belongs to Technology of EPC field, particularly the preparation method of plastic foam mould.
Background technology
Lost foam casting is to make and become and the design of part that will produce casting with foamed plastics macromolecular material, the duplicate full mold mould of size, through dip-coating fireproof coating, (play strengthening, bright and clean, permeation functions) after also drying, be embedded in dry quartz sand through three-dimensional vibrating moulding, casting molding flask pours into molten metal liquid under negative pressure state, the gasification of being heated of macromolecular material model is extracted out, and then the novel casting method of being produced foundry goods by the disposal molding New Casting Technique forming after liquid metals replacement cooled and solidified, due to this technology, to have cast article surface quality good, allowance is few, advantages such as production cost is low and being widely used, plastic foam mould is the key that determines foundry goods appearance and size, existing employing bubble is moulded in board making plastic foam mold process, due to bonding process misoperation and too high to the bake out temperature of plastic foam mould in coating process, plastic foam mould is prone to crack, unfilled corner, the defects such as pit, thereby cause plastic foam mould defective, affect casting product quality.
Summary of the invention
For solving the technical problem existing in prior art, the invention provides a kind of method of moulding board making plastic foam mould with bubble in casting process, eliminate the defects such as the crack that produces in plastic foam mould manufacturing process, unfilled corner, pit, improved the qualification rate of plastic foam mould.
Technical scheme of the present invention is as described below:
The method of moulding board making plastic foam mould with bubble in casting process, mainly comprises blanking, cutting, bonding, repairing, prebake, coating step,
In described repairing step, adopt liquid plastics foaming agent to repair the crack producing in bonding step, unfilled corner, pit,
In described prebake step, when drying room temperature reaches after 40-45 ℃, plastic foam mould is inserted in drying room to prebake 18-24 hours, remove the moisture in plastic foam mould,
In described coating step, in 40-45 ℃ of environment, plastic foam mould is carried out to coating, be often painted with after a dope layer, dry 4-5 hours, then be coated with lower one deck.
Further, in the present invention, during cast ironware, be coated with secondary black paint and secondary whiting, plastic foam mould total coating thickness is 1.5-2mm.
Further, in the present invention, during cast steel part, be coated with secondary whiting, plastic foam mould total coating thickness is 0.8-1.2mm.
Advantage of the present invention and beneficial effect are:
Compared with prior art, the present invention has eliminated bubble and has moulded the defects such as the crack that produces in board making plastic foam mold process, unfilled corner, pit, can improve the qualification rate of plastic foam mould, promote casting product quality, and preparation method is simple, easy to operate.
The specific embodiment
Below the present invention is described in further detail, but the scope that should at this point not be interpreted as theme of the present invention only limits to following embodiment, without departing from the idea case in the present invention described above, all various modifications, replacement and changes of making according to ordinary skill knowledge and customary means, include within the scope of the invention.
Embodiment mono-
The method of moulding board making plastic foam mould with bubble in casting process, mainly comprises blanking, cutting, bonding, repairing, prebake, coating step,
In described repairing step, adopt liquid plastics foaming agent to repair the crack producing in bonding step, unfilled corner, pit,
In described prebake step, when drying room temperature reaches after 40-45 ℃, plastic foam mould is inserted in drying room to prebake 18-24 hours, remove the moisture in plastic foam mould,
In described coating step, in 40-45 ℃ of environment, plastic foam mould is carried out to coating, be often painted with after a coating, dry 4-5 hours, then be coated with lower one deck.
Adopt the method for the present embodiment, eliminated bubble and moulded the defects such as the crack that produces in board making plastic foam mold process, unfilled corner, pit, can improve the qualification rate of plastic foam mould, promote casting product quality, and preparation method is simple, easy to operate.
Embodiment bis-
A method of moulding board making plastic foam mould with bubble in ironcasting casting process, mainly comprises blanking, cutting, bonding, repairing, prebake, coating step,
In described repairing step, adopt liquid plastics foaming agent to repair the crack producing in bonding step, unfilled corner, pit,
In described prebake step, when drying room temperature reaches after 40 ℃, plastic foam mould is inserted in drying room to prebake 24 hours, remove the moisture in plastic foam mould,
In described coating step, be coated with secondary black paint and secondary whiting, in 40 ℃ of environment, plastic foam mould is carried out to coating, be often painted with after a coating, to dry 5 hours, then be coated with lower one deck, plastic foam mould total coating thickness is 1.5-2mm.
Adopt the method for the present embodiment, eliminated bubble and moulded the defects such as the crack that produces in board making plastic foam mold process, unfilled corner, pit, improve the qualification rate of plastic foam mould more than 5%.
Embodiment tri-
A method of moulding board making plastic foam mould with bubble in casting steel casting process, mainly comprises blanking, cutting, bonding, repairing, prebake, coating step,
In described repairing step, adopt liquid plastics foaming agent to repair the crack producing in bonding step, unfilled corner, pit,
In described prebake step, when drying room temperature reaches after 45 ℃, plastic foam mould is inserted in drying room to prebake 18 hours, remove the moisture in plastic foam mould,
In described coating step, be coated with secondary whiting, in 40 ℃ of environment, plastic foam mould is carried out to coating, be often painted with after a coating, to dry 4 hours, then be coated with lower one deck, plastic foam mould total coating thickness is 0.8-1.2mm.
Adopt the method for the present embodiment, eliminated bubble and moulded the defects such as the crack that produces in board making plastic foam mold process, unfilled corner, pit, improve the qualification rate of plastic foam mould more than 3%.
Claims (3)
1. a method of moulding board making plastic foam mould with bubble in casting process, mainly comprises blanking, cutting, bonding, repairing, prebake, coating step,
In described repairing step, adopt liquid plastics foaming agent to repair the crack producing in bonding step, unfilled corner, pit,
In described prebake step, when drying room temperature reaches after 40-45 ℃, plastic foam mould is inserted in drying room to prebake 18-24 hours, remove the moisture in plastic foam mould,
In described coating step, in 40-45 ℃ of environment, plastic foam mould is carried out to coating, be often painted with after a coating, dry 4-5 hours, then be coated with lower one deck.
2. the method for making plastic foam mould according to claim 1, while it is characterized in that cast ironware, is coated with secondary black paint and secondary whiting, and plastic foam mould total coating thickness is 1.5-2mm.
3. the method for making plastic foam mould according to claim 1, while it is characterized in that cast steel part, is coated with secondary whiting, and plastic foam mould total coating thickness is 0.8-1.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641657.1A CN103658532A (en) | 2013-12-03 | 2013-12-03 | Method for making plastic foam die by using foamed plastic sheet in casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310641657.1A CN103658532A (en) | 2013-12-03 | 2013-12-03 | Method for making plastic foam die by using foamed plastic sheet in casting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103658532A true CN103658532A (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310641657.1A Pending CN103658532A (en) | 2013-12-03 | 2013-12-03 | Method for making plastic foam die by using foamed plastic sheet in casting process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778147A (en) * | 2014-12-17 | 2016-07-20 | 全耐塑料公司 | Three-dimensional foamed plastic product, and motor vehicle part and motor vehicle respectively including product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698218A (en) * | 2009-11-09 | 2010-04-28 | 山西天海泵业有限公司 | Lost-foam casting method for water pump thin-wall part |
| CN102284679A (en) * | 2011-09-19 | 2011-12-21 | 滁州金诺实业有限公司 | Method for casting engine cylinder cover by using lost foam |
| CN103372630A (en) * | 2012-04-25 | 2013-10-30 | 河北瑞丰动力缸体有限公司 | Evanescent mode production process of engine cylinder body |
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2013
- 2013-12-03 CN CN201310641657.1A patent/CN103658532A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698218A (en) * | 2009-11-09 | 2010-04-28 | 山西天海泵业有限公司 | Lost-foam casting method for water pump thin-wall part |
| CN102284679A (en) * | 2011-09-19 | 2011-12-21 | 滁州金诺实业有限公司 | Method for casting engine cylinder cover by using lost foam |
| CN103372630A (en) * | 2012-04-25 | 2013-10-30 | 河北瑞丰动力缸体有限公司 | Evanescent mode production process of engine cylinder body |
Non-Patent Citations (3)
| Title |
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| 刘进胜: "如何提高消失模铸件的几何尺寸精度", 《金属加工(热加工)》 * |
| 曹思盛等: "变速箱、后桥壳体消失模铸造工艺研究", 《中国铸造装备与技术》 * |
| 李健: "外齿轴套的消失模铸造", 《中国铸造装备与技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778147A (en) * | 2014-12-17 | 2016-07-20 | 全耐塑料公司 | Three-dimensional foamed plastic product, and motor vehicle part and motor vehicle respectively including product |
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Application publication date: 20140326 |