Research on injection molding of micro parts using layered structure mold
This paper describes a new method of molding micro parts using a mold which was manufactured by layering metallic foils and plates. Coolant channels are circulated uniformly under the mold surface, at a depth sufficiently close to the surface. Hence, the mold temperature can be kept uniform over the...
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2017-03-01
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| Series: | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jamdsm/11/1/11_2017jamdsm0009/_pdf/-char/en |
| _version_ | 1828781700019126272 |
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| author | Ryuuichirou FUJIEDA Shigeki KATOH Masanori KUNIEDA |
| author_facet | Ryuuichirou FUJIEDA Shigeki KATOH Masanori KUNIEDA |
| author_sort | Ryuuichirou FUJIEDA |
| collection | DOAJ |
| description | This paper describes a new method of molding micro parts using a mold which was manufactured by layering metallic foils and plates. Coolant channels are circulated uniformly under the mold surface, at a depth sufficiently close to the surface. Hence, the mold temperature can be kept uniform over the large area of inserts of both the movable and fixed die plates. Two stainless steel foils in which micro-gates and cavities are machined by electrical discharge machining, respectively, are layered on the insert of fixed die plate. The space between the insert of movable die plate and the stainless foils, called sheet runner, is first filled with resin due to injection. Thereafter, the micro-cavities are filled with resin through the micro-gates due to the pressure rise in the sheet runner. The air vent effect due to the layered structure helps the resin to fill the cavity smoothly. The process conditions under which polypropylene micro disk of 200μm in diameter and 60μm in thickness can be formed uniformly over the sheet runner area of 40mm by 50mm were obtained changing the injected resin volume, resin temperature, and gate size. Besides, micro lens 200μm in diameter and 50μm in thickness were formed using molds manufactured by electrical discharge machining and electrolyte jet machining. |
| first_indexed | 2024-12-11T17:37:31Z |
| format | Article |
| id | doaj.art-56d28f316ccc45029203f66c693d2a90 |
| institution | Directory Open Access Journal |
| issn | 1881-3054 |
| language | English |
| last_indexed | 2024-12-11T17:37:31Z |
| publishDate | 2017-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| spelling | doaj.art-56d28f316ccc45029203f66c693d2a902022-12-22T00:56:37ZengThe Japan Society of Mechanical EngineersJournal of Advanced Mechanical Design, Systems, and Manufacturing1881-30542017-03-01111JAMDSM0009JAMDSM000910.1299/jamdsm.2017jamdsm0009jamdsmResearch on injection molding of micro parts using layered structure moldRyuuichirou FUJIEDA0Shigeki KATOH1Masanori KUNIEDA2Department of Precision Engineering, The University of TokyoDepartment of Precision Engineering, The University of TokyoDepartment of Precision Engineering, The University of TokyoThis paper describes a new method of molding micro parts using a mold which was manufactured by layering metallic foils and plates. Coolant channels are circulated uniformly under the mold surface, at a depth sufficiently close to the surface. Hence, the mold temperature can be kept uniform over the large area of inserts of both the movable and fixed die plates. Two stainless steel foils in which micro-gates and cavities are machined by electrical discharge machining, respectively, are layered on the insert of fixed die plate. The space between the insert of movable die plate and the stainless foils, called sheet runner, is first filled with resin due to injection. Thereafter, the micro-cavities are filled with resin through the micro-gates due to the pressure rise in the sheet runner. The air vent effect due to the layered structure helps the resin to fill the cavity smoothly. The process conditions under which polypropylene micro disk of 200μm in diameter and 60μm in thickness can be formed uniformly over the sheet runner area of 40mm by 50mm were obtained changing the injected resin volume, resin temperature, and gate size. Besides, micro lens 200μm in diameter and 50μm in thickness were formed using molds manufactured by electrical discharge machining and electrolyte jet machining.https://www.jstage.jst.go.jp/article/jamdsm/11/1/11_2017jamdsm0009/_pdf/-char/enmicro partsinjection moldinglayered structure moldelectrical discharge machiningelectrolyte jet machining |
| spellingShingle | Ryuuichirou FUJIEDA Shigeki KATOH Masanori KUNIEDA Research on injection molding of micro parts using layered structure mold Journal of Advanced Mechanical Design, Systems, and Manufacturing micro parts injection molding layered structure mold electrical discharge machining electrolyte jet machining |
| title | Research on injection molding of micro parts using layered structure mold |
| title_full | Research on injection molding of micro parts using layered structure mold |
| title_fullStr | Research on injection molding of micro parts using layered structure mold |
| title_full_unstemmed | Research on injection molding of micro parts using layered structure mold |
| title_short | Research on injection molding of micro parts using layered structure mold |
| title_sort | research on injection molding of micro parts using layered structure mold |
| topic | micro parts injection molding layered structure mold electrical discharge machining electrolyte jet machining |
| url | https://www.jstage.jst.go.jp/article/jamdsm/11/1/11_2017jamdsm0009/_pdf/-char/en |
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