JPH1119980A - Injection molding method - Google Patents
Injection molding methodInfo
- Publication number
- JPH1119980A JPH1119980A JP18098397A JP18098397A JPH1119980A JP H1119980 A JPH1119980 A JP H1119980A JP 18098397 A JP18098397 A JP 18098397A JP 18098397 A JP18098397 A JP 18098397A JP H1119980 A JPH1119980 A JP H1119980A
- Authority
- JP
- Japan
- Prior art keywords
- injection
- disk
- molded article
- molding
- circular hole
- 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
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
(57)【要約】
【課題】 簡単に仕上げることのできる射出成形品の成
形方法を提供する。
【解決手段】 円形孔を有する射出成形品を成形するに
当たり、円形孔に対応する円板部分１１及びその周囲部
１４を射出成形して一次成形品１を成形し、一次成形品
１から円板部分１１を除去することにより円形孔を有す
る射出成形品を成形する方法であって、円板部分１１の
片面側に注入部１２が設けられ、円板部分１１の他の片
面側が周囲部よりも若干凹陥され、注入部１２の基部外
径ｄが円板部分１１の直径Ｄよりも若干小さい一次成形
品を成形した後、円板部分１１を除去する。
(57) [Problem] To provide a molding method of an injection molded article which can be easily finished. SOLUTION: In molding an injection molded product having a circular hole, a disk portion 11 corresponding to the circular hole and its peripheral portion 14 are injection molded to form a primary molded product 1, and a disk is formed from the primary molded product 1. A method for molding an injection-molded article having a circular hole by removing a part 11, wherein an injection part 12 is provided on one side of a disk part 11, and the other one side of the disk part 11 is higher than the surrounding part. After forming a primary molded product that is slightly depressed and the base outer diameter d of the injection portion 12 is slightly smaller than the diameter D of the disk portion 11, the disk portion 11 is removed.
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、円形孔を有する射
出成形品の成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding an injection molded article having a circular hole.
【０００２】[0002]
【従来の技術】従来、例えば，実開平２−２３９９３号
公報等に記載されているように、射出成形品の一次成形
品の本体部から注入部等を切断して射出成形品とするこ
とが知られている。2. Description of the Related Art Conventionally, as described in, for example, Japanese Utility Model Application Laid-Open No. 2-23993, an injection molded product is obtained by cutting an injection portion and the like from a main body of a primary molded product of an injection molded product. Are known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、特に円
形孔を有する射出成形品の成形方法においては、射出成
形品の一次成形品の本体部から注入部等を切断する他に
円形孔の部分を仕上げる必要があり、仕上げに手間を要
するものであった。However, in a method of molding an injection-molded article having a circular hole in particular, in addition to cutting the injection portion and the like from the main body of the primary molded article of the injection-molded article, a part of the circular hole is finished. It was necessary and required a lot of work to finish.
【０００４】本発明は、従来の射出成形品の成形方法に
おけるこのような問題点に着目してなされたものであ
り、その目的とするところは、上記の問題を解決し、簡
単に仕上げることのできる射出成形品の成形方法を提供
することにある。The present invention has been made in view of such a problem in a conventional method of molding an injection-molded article. It is an object of the present invention to solve the above-mentioned problem and to provide a simple finish. It is an object of the present invention to provide a molding method for an injection molded article that can be formed.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の射出成形品の成形方法は、円形孔を有する
射出成形品を成形するに当たり、円形孔に対応する円板
部分及びその周囲部を射出成形して一次成形品を成形
し、一次成形品から円板部分を除去することにより円形
孔を有する射出成形品を成形する方法であって、円板部
分の片面側に注入部が設けられ、円板部分の他の片面側
が周囲部よりも若干凹陥され、注入部の基部外径が円板
部分の直径よりも若干小さい一次成形品を成形した後、
円板部分を除去することを特徴とするものである。In order to achieve the above-mentioned object, a method for molding an injection-molded article according to the present invention provides a method for molding an injection-molded article having a circular hole. A method for molding an injection molded article having a circular hole by injection molding a peripheral portion to form a primary molded product, and removing a disk portion from the primary molded product, wherein an injection portion is provided on one side of the disk portion. Is provided, the other one side of the disc portion is slightly recessed from the surrounding portion, and after forming the primary molded product, the base outer diameter of the injection portion is slightly smaller than the diameter of the disc portion,
The disk portion is removed.
【０００６】本発明方法において、使用する合成樹脂と
しては、特に限定されるものではないが、例えば、ポリ
エチレン、ポリプロピレン、塩化ビニル樹脂、ＡＢＳ樹
脂等の熱可塑性樹脂が使用できる。In the method of the present invention, the synthetic resin used is not particularly limited, but for example, thermoplastic resins such as polyethylene, polypropylene, vinyl chloride resin and ABS resin can be used.
【０００７】〔作用〕本発明の射出成形品の成形方法に
おいては、円板部分の片面側に注入部が設けられ、円板
部分の他の片面側が周囲部よりも若干凹陥され、注入部
の基部外径が円板部分の直径よりも若干小さい一次成形
品を成形した後、円板部分を除去するものであるから、
円板部分の他の片面側の凹陥部から円板部分の外径とほ
ぼ等しい外径のドリルを挿入して円板部分を除去するこ
とにより所望の円形孔を有する射出成形品を容易に成形
することができ、凹陥部がドリル挿入時のガイドとなり
穿孔作業が容易となる。In the method of molding an injection-molded article according to the present invention, an injection portion is provided on one side of the disk portion, and the other side of the disk portion is slightly recessed from the surrounding portion. After forming the primary molded product whose base outer diameter is slightly smaller than the diameter of the disk part, the disk part is removed,
An injection molded product having a desired circular hole can be easily formed by inserting a drill having an outer diameter substantially equal to the outer diameter of the disc portion from the other one side concave portion of the disc portion and removing the disc portion. The concave portion serves as a guide when inserting the drill, and the drilling operation is facilitated.
【０００８】[0008]
【発明の実施の形態】次に、本発明の実施の形態を図面
を参照しながら説明する。図１は本発明の射出成形品の
成形方法の一実施の態様を示す説明図、図２は本発明方
法により成形された円形孔を有する射出成形品の一例を
示す正面図である。図１において、１は一次成形品、１
１は一次成形品１の中央部に設けられた円板部分、１２
は円板部分１１の片面側に突設された注入部、１３は円
板部分１１の片面側に設けられた凹陥部、１４は周囲
部、１５は周囲部１４に設けられた段部である。注入部
１２の基部の外径ｄは７ｍｍ、円板部分１１及び凹陥部
１３の直径Ｄは９ｍｍ、凹陥部１３の深さｔは１ｍｍ、
周囲部１４の厚さＴは３．５ｍｍである。Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing one embodiment of a method for molding an injection molded article of the present invention, and FIG. 2 is a front view showing an example of an injection molded article having a circular hole molded by the method of the present invention. In FIG. 1, 1 is a primary molded product, 1
Reference numeral 1 denotes a disk portion provided at the center of the primary molded product 1;
Is an injection portion protruding on one side of the disk portion 11, 13 is a concave portion provided on one side of the disk portion 11, 14 is a peripheral portion, and 15 is a step provided on the peripheral portion 14. . The outer diameter d of the base of the injection portion 12 is 7 mm, the diameter D of the disk portion 11 and the concave portion 13 is 9 mm, the depth t of the concave portion 13 is 1 mm,
The thickness T of the peripheral portion 14 is 3.5 mm.
【０００９】先ず、図示しない射出成形用金型を使用し
て図１に示す一次成形品を射出成形し、次いで、凹陥部
１３の口径とほぼ等しい外径のドリル２を凹陥部１３か
ら挿入して穿孔することにより注入部１２が突設された
円板部分１１を切除することにより図２に示すように、
中央部に円形孔３１を有する射出成形品３を成形する。First, a primary molded article shown in FIG. 1 is injection-molded using an injection mold (not shown), and then a drill 2 having an outer diameter substantially equal to the diameter of the recess 13 is inserted from the recess 13. As shown in FIG. 2, by cutting out the disc portion 11 on which the injection portion 12 is protruded by piercing,
An injection molded product 3 having a circular hole 31 in the center is formed.
【００１０】図１、２に示す本発明方法の態様において
は、図１に示す一次成形品を射出成形し、次いで、凹陥
部１３の口径とほぼ等しい外径のドリル２を凹陥部１３
から挿入して穿孔することにより注入部１２が突設され
た円板部分１１を切除することにより図２に示すよう
に、中央部に円形孔３１を有する射出成形品３を成形す
ることができ、注入部１２の除去跡や円形孔３１の部分
の仕上げを要しない。In the embodiment of the method of the present invention shown in FIGS. 1 and 2, the primary molded article shown in FIG. 1 is injection-molded, and then the drill 2 having an outer diameter substantially equal to the diameter of the recess 13 is formed.
As shown in FIG. 2, the injection-molded article 3 having a circular hole 31 in the center can be formed by cutting out the disc portion 11 on which the injection portion 12 is protruded by inserting and drilling. In addition, it is not necessary to finish the removal of the injection part 12 or the circular hole 31.
【００１１】凹陥部１３はドリル２を挿入する際のガイ
ドの役目をし、ドリル２による穿孔作業が容易となる。The recess 13 serves as a guide when the drill 2 is inserted, and the drilling operation by the drill 2 is facilitated.
【００１２】以上、本発明の実施の形態を図により説明
したが、本発明の具体的な構成は図示の実施の形態に限
定されるものではなく、本発明の要旨を逸脱しない範囲
の設計変更は本発明に含まれる。Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration of the present invention is not limited to the illustrated embodiment, and the design change within a range not departing from the gist of the present invention. Are included in the present invention.
【００１３】例えば、図示の実施の形態のように、周囲
部１４に段部１５が設けられていなくてもよい。For example, the step portion 15 may not be provided in the peripheral portion 14 as in the illustrated embodiment.
【００１４】[0014]
【発明の効果】本発明の射出成形品の成形方法において
は、円板部分の他の片面側の凹陥部から円板部分の外径
とほぼ等しい外径のドリルを挿入して円板部分を除去す
ることにより所望の円形孔を有する射出成形品を容易に
成形することができ、凹陥部がドリル挿入時のガイドと
なり穿孔作業が容易となる。According to the method of molding an injection-molded article of the present invention, a drill having an outer diameter substantially equal to the outer diameter of the disc portion is inserted from the other one side concave portion of the disc portion to form the disc portion. By removing it, an injection molded product having a desired circular hole can be easily formed, and the recessed portion serves as a guide when inserting a drill, thereby facilitating the drilling operation.
【図１】本発明の射出成形品の成形方法の一実施態様を
示す説明図。FIG. 1 is an explanatory view showing one embodiment of a method for molding an injection molded article of the present invention.
【図２】本発明の射出成形品の成形方法により成形され
た射出成形品を示す正面図。FIG. 2 is a front view showing an injection-molded product formed by the method for molding an injection-molded product of the present invention.
１ 一次成形品 １１ 円板部分 １２ 注入部 １３ 凹陥部 １４ 周囲部 １５ 段部 ２ ドリル ３ 射出成形品 ３１ 円形孔 DESCRIPTION OF SYMBOLS 1 Primary molded article 11 Disc part 12 Injection part 13 Depressed part 14 Peripheral part 15 Step part 2 Drill 3 Injection molded article 31 Circular hole
Claims (1)
当たり、円形孔に対応する円板部分及びその周囲部を射
出成形して一次成形品を成形し、一次成形品から円板部
分を除去することにより円形孔を有する射出成形品を成
形する方法であって、円板部分の片面側に注入部が設け
られ、円板部分の他の片面側が周囲部よりも若干凹陥さ
れ、注入部の基部外径が円板部分の直径よりも若干小さ
い一次成形品を成形した後、円板部分を除去することを
特徴とする射出成形品の成形方法。When molding an injection molded article having a circular hole, a disk portion corresponding to the circular hole and a peripheral portion thereof are injection molded to form a primary molded product, and the disk portion is removed from the primary molded product. A method of molding an injection-molded article having a circular hole by doing, an injection part is provided on one side of the disk part, the other one side of the disk part is slightly recessed from the surrounding part, A method of molding an injection-molded article, comprising: forming a primary molded article whose base outer diameter is slightly smaller than the diameter of the disc portion; and removing the disc portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18098397A JPH1119980A (en) | 1997-07-07 | 1997-07-07 | Injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18098397A JPH1119980A (en) | 1997-07-07 | 1997-07-07 | Injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1119980A true JPH1119980A (en) | 1999-01-26 |
Family
ID=16092701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18098397A Pending JPH1119980A (en) | 1997-07-07 | 1997-07-07 | Injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1119980A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015174245A (en) * | 2014-03-13 | 2015-10-05 | 三ツ星ベルト株式会社 | Cutting equipment |
-
1997
- 1997-07-07 JP JP18098397A patent/JPH1119980A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015174245A (en) * | 2014-03-13 | 2015-10-05 | 三ツ星ベルト株式会社 | Cutting equipment |
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