CN101759867B - Method for pressurizing and ageing expanded bead for lost mold - Google Patents
Method for pressurizing and ageing expanded bead for lost mold Download PDFInfo
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- CN101759867B CN101759867B CN201010001664A CN201010001664A CN101759867B CN 101759867 B CN101759867 B CN 101759867B CN 201010001664 A CN201010001664 A CN 201010001664A CN 201010001664 A CN201010001664 A CN 201010001664A CN 101759867 B CN101759867 B CN 101759867B
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- expanded
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Abstract
The invention relates to a method for pressurizing and ageing an expanded bead for a lost mold, which comprises the following steps: firstly, placing a bead after being aged under the normal pressure into a pressure tank; secondly, leading compressed air into the pressure tank to pressurize, wherein the air pressure is 0.2-0.25 MPa and is kept for above 2 hours; and thirdly, directly shooting the bead after being pressurized and aged into a foam molding mold cavity or a forming machines bucket to immediately use. By adopting the method for pressurizing and ageing the expanded bead for the lost mold, because the inside air pressure of the bead is higher, the bead is easier to expand under higher internal pressure when being heated and softened by steam during the foam molding, and the surface thereof is easy to expand and level, thereby a foamed plastic mold plate with a smooth surface can be obtained. By adopting invention, the bead with deficient foaming agent content, in particular to a small bead with easy-to-transgress foaming agents is easier to expand, and the surface thereof is easy to expand and level.
Description
Technical field
The present invention relates to a kind of making method of the mould that disappears, particularly a kind of mould that disappears is with beads, method for pressurizing and ageing expanded bead that foaming agents content is lower.
Background technology
The disappearance molded is with bead tens times of volumetric expansions after pre-frothing, and bead is inner to become the negative-pressure vacuum state, if foaming can be too low because of interior pressure when heating immediately; Softening back, surface bead shrinks, and therefore should do maturation process in advance, is about to bead and in air, places for some time (about 2 hours to 24 hours; Look bead size and difference; The more little curing time is short more), make air go deep into bead inside, equal basically until external and internal pressure.If demanding surface quality, the disappearance mould often uses beads, and the effusion of the whipping agent of beads is fast, cannot say for sure to deposit, and foaming agents content is lower before sending out in advance, and is lower after preparatory the sending out, and the surface is difficult to expand and puts down behind the foaming.
Summary of the invention
For addressing the above problem, the present invention provides a kind of method for pressurizing and ageing expanded bead for lost mold, and the surface is expanded flat easily behind the bead foaming of handling with said method.
Method for pressurizing and ageing expanded bead for lost mold of the present invention wherein, comprises step:
Step 1 is put into pressure-pot with the bead after the normal pressure slaking;
Step 2 feeds pressurized with compressed air in said pressure-pot, air pressure is 0.2-0.25MPa, keeps more than 2 hours;
Step 3 is directly injected use immediately in foaming die cavity or the shaper batch can with the bead behind the pressurizing and ageing.
Method for pressurizing and ageing expanded bead for lost mold of the present invention, wherein, step 2 is: in said pressure-pot, feed pressurized with compressed air, air pressure is 0.2-0.25MPa, keeps being forced into 0.35-0.4MPa once more after 2-4 hour, keeps more than 2 hours again.
Method for pressurizing and ageing expanded bead for lost mold of the present invention, wherein, said expanded bead for lost mold is EPS or STMMA bead.
Method for pressurizing and ageing expanded bead for lost mold of the present invention is because the air pressure inside of bead is higher; During foaming, when bead was softened by steam heating, inner higher interior pressure expanded bead more easily; The surface is expanded flat easily, can obtain the porous plastics matrix of any surface finish.
Embodiment
Below in conjunction with Figure of description method for pressurizing and ageing expanded bead for lost mold of the present invention is described further.
Method for pressurizing and ageing expanded bead for lost mold of the present invention wherein, comprises step:
Step 1 is put into pressure-pot with the bead after the normal pressure slaking;
Step 2 feeds pressurized with compressed air in said pressure-pot, for preventing the bead after the slaking of the excessive flattening normal pressure of pressure, one time moulding pressure can not be excessive, can be 0.2MPa or 0.25MPa, kept 2 or 4 hours; Intensified pressure keeps being forced into 0.35MPa or 0.4MPa once more after 2 or 4 hours if desired, keeps 2 or 4 hours again.
Step 3 is directly injected use immediately in foaming die cavity or the shaper batch can with the bead behind the pressurizing and ageing.During foaming, when bead was softened by steam heating, inner higher interior pressure expanded bead more easily, can obtain the porous plastics matrix of any surface finish.
Said expanded bead for lost mold is EPS (eps) bead or STMMA (expandability methymethacrylate, styrene copolymerized bead), is applicable to any particle diameter.Method for pressurizing and ageing expanded bead for lost mold of the present invention is specially adapted to make thin-walled foam mould with beads, uses the thin-walled matrix like mover.
Above embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (2)
1. a method for pressurizing and ageing expanded bead for lost mold is characterized in that, comprises step:
Step 1 is put into pressure-pot with the expanded bead after the normal pressure slaking, and said expanded bead is expandable polystyrene bead or expandability methymethacrylate, styrene copolymerized bead;
Step 2 feeds pressurized with compressed air in said pressure-pot, air pressure is 0.2-0.25MPa, keeps more than 2 hours;
Step 3 is directly injected use immediately in foaming die cavity or the shaper batch can with the bead behind the pressurizing and ageing.
2. method for pressurizing and ageing expanded bead for lost mold according to claim 1; It is characterized in that step 2 is: in said pressure-pot, feed pressurized with compressed air, air pressure is 0.2-0.25MPa; Keep being forced into 0.35-0.4MPa once more after 2-4 hour, keep again more than 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010001664A CN101759867B (en) | 2010-01-21 | 2010-01-21 | Method for pressurizing and ageing expanded bead for lost mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010001664A CN101759867B (en) | 2010-01-21 | 2010-01-21 | Method for pressurizing and ageing expanded bead for lost mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101759867A CN101759867A (en) | 2010-06-30 |
| CN101759867B true CN101759867B (en) | 2012-10-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010001664A Expired - Fee Related CN101759867B (en) | 2010-01-21 | 2010-01-21 | Method for pressurizing and ageing expanded bead for lost mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101759867B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856468B (en) * | 2016-06-08 | 2018-10-09 | 惠州景华包装制品有限公司 | A kind of EPS heats supercharging curing process |
| CN106079219B (en) * | 2016-06-08 | 2018-11-02 | 惠州景华包装制品有限公司 | A kind of eps foam packing case production technology |
| CN107096878A (en) * | 2017-03-27 | 2017-08-29 | 六安市龙兴汽车零部件有限公司 | A kind of white mould raw material curing process method of evaporative pattern |
| CN107627522A (en) * | 2017-10-12 | 2018-01-26 | 芜湖市伟华泡塑有限公司 | A kind of manufacture method of EPS precisions graphene lunch box for environment protection |
| CN111391435A (en) * | 2020-03-25 | 2020-07-10 | 巩义市泛锐熠辉复合材料有限公司 | Novel composite fiber board and preparation method thereof |
| CN112936706A (en) * | 2021-01-27 | 2021-06-11 | 芜湖冠锋模具塑料有限公司 | Lost foam plate production process using STMMA material |
-
2010
- 2010-01-21 CN CN201010001664A patent/CN101759867B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 孙平等.铝合金消失模铸造常见缺陷分析.《特种铸造及有色合金》.2009,(第03期), * |
| 梁贺等.消失模涂料概述.《河北工业科技》.2007,(第06期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101759867A (en) | 2010-06-30 |
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Owner name: ANHUI NANKAI YUAN MACHINERY CO., LTD. Free format text: FORMER OWNER: ANHUI ZHONGXING HUAHAN MACHINERY CO., LTD. Effective date: 20150715 |
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Effective date of registration: 20150715 Address after: 231299 Feixi Hefei Anhui upper send Industrial Zone Patentee after: ANHUI NANKAIYUAN MACHINERY Co.,Ltd. Address before: 232100 Anhui Economic Development Zone, Huainan, Anhui, Fengtai Patentee before: ANHUI ZHONGXING HUAHAN MACHINERY Co.,Ltd. |
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Granted publication date: 20121010 Termination date: 20220121 |