JPH01112921U - - Google Patents
Info
- Publication number
- JPH01112921U JPH01112921U JP871488U JP871488U JPH01112921U JP H01112921 U JPH01112921 U JP H01112921U JP 871488 U JP871488 U JP 871488U JP 871488 U JP871488 U JP 871488U JP H01112921 U JPH01112921 U JP H01112921U
- Authority
- JP
- Japan
- Prior art keywords
- connecting rod
- injection molding
- state
- product
- holding member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4421—Removing or ejecting moulded articles for undercut articles using expansible or collapsible cores
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
第１図乃至第８図は本考案の一実施例であり、
第１図は、射出成形装置を縦断面してその動作を
示す図であり、イ図は、固定型と可動型とを型開
きした状態、ロ図は、押し出しロツドにてエジエ
クタプレートを押し出して傾斜連結棒によつてコ
アをアンダカツト部から離脱した状態、ハ図は、
上下のエジエクタプレートを離して連結棒保持部
材を移動させ、コアをアンダカツト部から離脱し
た状態、ニ図は、連結棒を揺動してコアを移動し
た状態をそれぞれ示した図、第２図は、射出成形
装置の平面図、第３図は第２図のＢ―Ｂ線におけ
る縦断面図、第４図は、カムを用いた射出成形機
の縦断面図、第５図及び第６図は、第４図に示し
た実施例の作動状態を示し、第５図は、カムの係
止が外れる寸前の状態を示す縦断面図、第６図は
カムの係止が外れた状態を示す縦断面図、第７図
はカムを用いた射出成形機の平面図、第８図は第
７図のＣ―Ｃ線における縦断面図である。第９図
は、ＸＹ方向にアンダカツト部を有する自動車の
バンパを例示した説明用図、第１０図は第９図の
Ａ―Ａ線における縦断面図である。第１１図は従
来例の射出成形工程を示す図であり、イ図は、射
出時の状態、ロは型開きの状態、ハ図は一段目の
製品突き出し時、ニ図は、２段目の製品突き出し
時をそれぞれ示す模式図である。
１，２，３……コア、６……下エジエクタプレ
ート、７……上エジエクタプレート、８，９……
連結棒、１０……傾斜面、１１……傾斜連結棒、
１２……傾斜ブロツク、１４……連結棒保持部材
。
Figures 1 to 8 show an embodiment of the present invention,
Figure 1 is a longitudinal cross-sectional view of the injection molding apparatus to show its operation. Figure C shows the state in which the core is separated from the undercut by the inclined connecting rod.
Figure 2 shows the state in which the upper and lower ejector plates are separated and the connecting rod holding member is moved, and the core is removed from the undercut part. Figure 2 shows the state in which the core is moved by swinging the connecting rod. is a plan view of the injection molding device, FIG. 3 is a vertical cross-sectional view taken along line BB in FIG. 2, FIG. 4 is a vertical cross-sectional view of the injection molding machine using a cam, and FIGS. 5 and 6. 4 shows the operating state of the embodiment shown in FIG. 4, FIG. 5 is a longitudinal cross-sectional view showing the state where the cam is about to be released, and FIG. 6 shows the state where the cam is released. 7 is a plan view of an injection molding machine using a cam, and FIG. 8 is a longitudinal sectional view taken along line CC in FIG. 7. FIG. 9 is an explanatory diagram illustrating an example of an automobile bumper having an undercut portion in the XY direction, and FIG. 10 is a longitudinal sectional view taken along the line AA in FIG. 9. Figure 11 is a diagram showing the conventional injection molding process. Figure A is the state at the time of injection, B is the state when the mold is opened, Figure C is when the product is ejected from the first stage, and Figure D is the state when the product is ejected from the second stage. FIG. 6 is a schematic diagram showing the product ejecting time. 1, 2, 3... Core, 6... Lower ejector plate, 7... Upper ejector plate, 8, 9...
Connecting rod, 10... inclined surface, 11... inclined connecting rod,
12... Inclined block, 14... Connecting rod holding member.
Claims (1)
おいて、製品の押出し方向に所定寸法移動する連
結棒保持部材をエジエクタプレートに設け、該連
結棒保持部材に連結棒を揺動可能に連結し、該連
結棒の先端にアンダカツトを形成するコアを取付
けたことを特徴とする射出成形装置。 In an injection molding apparatus for a product having an undercut portion, a connecting rod holding member that moves a predetermined distance in the extrusion direction of the product is provided on the ejector plate, a connecting rod is swingably connected to the connecting rod holding member, and the connecting rod is An injection molding device characterized in that a core forming an undercut is attached to the tip of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP871488U JPH01112921U (en) | 1988-01-26 | 1988-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP871488U JPH01112921U (en) | 1988-01-26 | 1988-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01112921U true JPH01112921U (en) | 1989-07-28 |
Family
ID=31214833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP871488U Pending JPH01112921U (en) | 1988-01-26 | 1988-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01112921U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2940169A1 (en) * | 2008-12-19 | 2010-06-25 | Sagem Comm | Article i.e. electronic equipment case, manufacturing mold, has mobile element defining portion of base and portion of contiguous side wall, and mobile element mounted on plate to slide along direction parallel to ejection direction |
| JP2018183970A (en) * | 2017-04-27 | 2018-11-22 | トヨタ自動車株式会社 | Mold structure of vehicle bumper |
-
1988
- 1988-01-26 JP JP871488U patent/JPH01112921U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2940169A1 (en) * | 2008-12-19 | 2010-06-25 | Sagem Comm | Article i.e. electronic equipment case, manufacturing mold, has mobile element defining portion of base and portion of contiguous side wall, and mobile element mounted on plate to slide along direction parallel to ejection direction |
| JP2018183970A (en) * | 2017-04-27 | 2018-11-22 | トヨタ自動車株式会社 | Mold structure of vehicle bumper |
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