JPH0441210A - Sleeve pin - Google Patents
Sleeve pinInfo
- Publication number
- JPH0441210A JPH0441210A JP14967590A JP14967590A JPH0441210A JP H0441210 A JPH0441210 A JP H0441210A JP 14967590 A JP14967590 A JP 14967590A JP 14967590 A JP14967590 A JP 14967590A JP H0441210 A JPH0441210 A JP H0441210A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- bin
- sleeve bin
- sliding hole
- mold body
- 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
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
- B29C45/4471—Removing or ejecting moulded articles for undercut articles using flexible or pivotable undercut forming elements
-
- 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
-
- 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
- B29C45/26—Moulds
- B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、プラスチックの成形品にボス部を成形するス
リーブビンに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sleeve bottle in which a boss portion is molded into a plastic molded product.
〈従来の技術〉
従来のこの種のスリーブビンについて第３図を参照しつ
つ説明する。<Prior Art> A conventional sleeve bin of this type will be explained with reference to FIG.
プラスチックの成形品４０のボス部４１は、金型本体２
０に開設された摺動孔２１に筒状のろリーブピン１０を
挿入し、当該スリーブピン１０にコアピン３０を挿入し
てなる金型によって成形される （第３図（萄参照）、
前記摺動孔２１は、開口部から成形されるべきボス部４
１の高さに相当する奥側までθ°の傾斜をもって徐々に
絞られて他の部分より若干太くなっている。これは、ボ
ス部４１の外周面に成形品４０を取り出す際の抜勾配θ
°を成形するためのものである。The boss portion 41 of the plastic molded product 40 is connected to the mold body 2
A cylindrical sleeve pin 10 is inserted into a sliding hole 21 opened at 0, and a core pin 30 is inserted into the sleeve pin 10.
The sliding hole 21 has a boss portion 4 to be formed from the opening.
It is gradually narrowed down with an inclination of θ° to the back side corresponding to the height of 1, and is slightly thicker than other parts. This is the draft angle θ when taking out the molded product 40 on the outer peripheral surface of the boss portion 41.
It is for molding.
成形品４０の取り外しは、金型本体２０及びコアビン３
０をスリーブビン１０に対して相対的に移動させて、ス
リーブビン１０を摺動孔２１から突出させて、成形品４
０を突き出すようにして行っている（第３図（ロ）参照
）。To remove the molded product 40, remove the mold body 20 and core bin 3.
0 relative to the sleeve bin 10, the sleeve bin 10 is made to protrude from the sliding hole 21, and the molded product 4 is moved.
This is done by sticking out the 0 (see Figure 3 (b)).
〈発明が解決しようとする課題〉
しかしながら、上述した従来のスリーブビンには以下の
ような問題点がある。<Problems to be Solved by the Invention> However, the above-described conventional sleeve bin has the following problems.
すなわち、ボス部の高さが高くなると、抜勾配を形成す
るためにボス部の根元の肉厚が厚くなり、ヒケ等の外観
不良が発生し易くなる。また、ヒケの防止のために、ボ
ス部の根元の周囲を他の部分より薄く成形してアンダカ
ットとすることができない。That is, as the height of the boss increases, the wall thickness at the base of the boss increases to form a draft, making it more likely that defects in appearance such as sink marks will occur. Furthermore, in order to prevent sink marks, the periphery of the base of the boss cannot be formed thinner than other parts to form an undercut.
本発明は上記事情に鑑みて創案されたもので、高くても
肉厚が均一なボス部を成形することができるとともに、
アンダカットにも対応することができるスリーブビンを
提供することを目的としている。The present invention was devised in view of the above circumstances, and it is possible to form a boss portion with uniform wall thickness even if it is tall, and
It is an object of the present invention to provide a sleeve bin that can also handle undercuts.
〈課題を解決するための手段〉
本発明に係るスリーブビンは、先端に形成された複数の
スリットで仕切られた部分が外側に向かって屈曲してお
り、金型本体の摺動孔に収納されると、前記スリットが
内側に変位して円筒状に変形するように構成されている
。<Means for Solving the Problems> In the sleeve bin according to the present invention, a portion partitioned by a plurality of slits formed at the tip is bent outward, and is housed in a sliding hole of a mold body. When this happens, the slit is displaced inward and deformed into a cylindrical shape.
〈作用〉
スリーブビンは、金型本体の摺動孔に収容されて１本の
円筒になっている。<Operation> The sleeve bin is housed in the sliding hole of the mold body and has a single cylindrical shape.
かかるスリーブビンの内部にコアビンを挿入する。A core bin is inserted into such a sleeve bin.
この状態で金型のキャビティに溶融したプラスチックを
注入する。プラスチックが固化して成形品となったなら
ば、型開きを行う。この型開きに際して、金型本体とコ
アビンとはスリーブビンに対して相対的に移動して、ス
リーブビンは金型本体の外側に押し出される。すると、
スリーブビンが摺動孔から飛び出て、スリットに仕切ら
れた部分がそのバネ性のために外側に変位してボス部の
外周面から外れる。In this state, molten plastic is injected into the mold cavity. Once the plastic has solidified into a molded product, the mold is opened. During this mold opening, the mold body and core bin move relative to the sleeve bin, and the sleeve bin is pushed out of the mold body. Then,
The sleeve bottle pops out from the sliding hole, and the portion partitioned by the slit is displaced outward due to its spring properties and comes off from the outer peripheral surface of the boss portion.
〈実施例〉
以下、図面を参照して本発明に係る一実施例を説明する
。<Example> Hereinafter, an example according to the present invention will be described with reference to the drawings.
第１図（ａ）は本発明の一実施例に係るスリーブビンの
外観斜視図、第１図Φ）はそのスリーブビンの一部破断
斜視図、第２図はこのスリーブビンを用いた成形の手順
を示す概略的断面図である。FIG. 1(a) is an external perspective view of a sleeve bin according to an embodiment of the present invention, FIG. 1(Φ) is a partially cutaway perspective view of the sleeve bin, and FIG. It is a schematic sectional view showing a procedure.
本実施例に係るスリーブビン１０は、バネ鋼材で形成さ
れており、その先端には円周を四等分するかたちで４つ
のスリット１１が形成されている。このスリット１１で
仕切られた部分１２は、第１図０：１）に示すように外
側に向かってθ°屈曲されている。The sleeve bin 10 according to this embodiment is made of a spring steel material, and has four slits 11 formed at its tip to divide the circumference into four equal parts. The portion 12 partitioned by the slit 11 is bent outward by θ° as shown in FIG. 1 (0:1).
また、当該スリーブピン１０の内周面には適当な肉盗み
１４が形成され、前記スリット１１で仕切られた部分１
２のバネ性を高めるようにしである。さらに、当該スリ
ーブビン１０の先端の内周面には、アンダカット４１２
に対応する突脈１３が形成されている。In addition, a suitable cutout 14 is formed on the inner peripheral surface of the sleeve pin 10, and a portion 1 partitioned by the slit 11
This is to improve the springiness of the second part. Furthermore, an undercut 412 is provided on the inner peripheral surface of the tip of the sleeve bin 10.
A ridge 13 corresponding to the ridge 13 is formed.
上述したスリーブビン１０によって、ボス部４１を有す
る成形品４０を成形する手順について説明する。A procedure for molding a molded product 40 having a boss portion 41 using the sleeve bin 10 described above will be described.
スリーブビン１０は、金型本体２０の摺動孔２１に挿入
されて収容されている。摺動孔２１はスリーブビン１０
の外径に等しく設定されているので、挿入されたスリー
ブビン１０のスリット１１は閉じて１本の円筒になって
いる（第２図（ａ）参照）。The sleeve bin 10 is inserted and housed in the sliding hole 21 of the mold body 20. The sliding hole 21 is the sleeve bin 10
The slit 11 of the inserted sleeve bin 10 is closed to form a single cylinder (see FIG. 2(a)).
かかるスリーブビン１０の内部にコアビン３０を挿入す
る。このコアビン３０は、ボス部４１の中空部４１工を
成形するためのものである。The core bin 30 is inserted into the sleeve bin 10. This core bin 30 is for molding the hollow part 41 of the boss part 41.
この状態で金型のキャビティに溶融したプラスチックを
注入する。プラスチックが固化して成形品４０となった
ならば、型開きを行う。この型開きに際して、金型本体
２０とコアビン３０とはスリーブビン１０に対して相対
的に移動するので、スリーブビン１０は金型本体２０の
外側に飛び出し、同時に成形品４０の離型が行われる。In this state, molten plastic is injected into the mold cavity. Once the plastic has solidified into the molded product 40, the mold is opened. During this mold opening, the mold body 20 and core bin 30 move relative to the sleeve bin 10, so the sleeve bin 10 pops out of the mold body 20, and at the same time, the molded product 40 is released from the mold. .
すなわち、スリーブビン１０が摺動孔２１から飛び出る
と、スリット１１に仕切られた部分１２がそのバネ性の
ために外側に変位してボス部４１の外周面から外れる（
第２図ら）参照）。That is, when the sleeve bin 10 pops out of the sliding hole 21, the portion 12 partitioned by the slit 11 is displaced outward due to its springiness and comes off from the outer peripheral surface of the boss portion 41 (
(See Figure 2 et al.).
なお、上述した実施例では、４つのスリッ目１が形成さ
れているとしたが、本発明がこれに限定されるけではな
く、３つ又は５つ以上であってもよい。In the above-described embodiment, four slits 1 are formed, but the present invention is not limited to this, and the number may be three or five or more.
〈発明の効果〉
本発明に係るスリーブビンは、先端に形成された複数の
スリットで仕切られた部分が外側に向かって屈曲してお
り、金型本体の摺動孔に収納されると、前記スリットが
内側に変位して円筒状に変形するようムこ構成されてい
るので、成形品の離型に際して、スリーブビンが摺動孔
から飛び出ると、スリットで仕切られた部分が外側に変
位し、ボス部の外周面から外れる。従って、従来のスリ
ーブビンでは不可能であったボス部の根元の周囲のアン
ダカットを成形することが可能になり、高さが高くても
均一な肉厚のボス部を成形することができる。<Effects of the Invention> In the sleeve bin according to the present invention, the portion partitioned by a plurality of slits formed at the tip is bent outward, and when stored in the sliding hole of the mold body, the Since the slit is configured to move inward and deform into a cylindrical shape, when the sleeve bin pops out of the sliding hole when releasing the molded product, the part partitioned by the slit will be displaced outward, It comes off the outer circumferential surface of the boss. Therefore, it is possible to form an undercut around the base of the boss, which was impossible with conventional sleeve bins, and it is possible to form a boss with uniform thickness even if the height is high.
第１図（６）は本発明の一実施例に係るスリーブビンの
外観斜視図、第１図（ロ）はそのスリーブビンの一部破
断斜視図、第２図はこのスリーブビンを用いた成形の手
順を示す概略的断面図、第３図は従来のスリーブビンを
用いた成形の手順を示す概略的断面図である。
１０・・・スリーブビン、１１・・・スリット、１２・
・・スリットで仕切られた部分、２ｏ・・・金型本体、
、２１・・・摺動孔。Fig. 1 (6) is an external perspective view of a sleeve bin according to an embodiment of the present invention, Fig. 1 (b) is a partially cutaway perspective view of the sleeve bin, and Fig. 2 is a molding using this sleeve bin. FIG. 3 is a schematic sectional view showing the procedure of molding using a conventional sleeve bottle. 10...Sleeve bin, 11...Slit, 12.
...Part partitioned by slits, 2o...Mold body,
, 21...Sliding hole.
Claims (1)
分が外側に向かって屈曲しており、金型本体の摺動孔に
収納されると、前記スリットが内側に変位して円筒状に
変形することを特徴とするスリーブピン。(1) The part partitioned by multiple slits formed at the tip is bent outward, and when it is stored in the sliding hole of the mold body, the slits are displaced inward to form a cylindrical shape. A sleeve pin that is deformable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14967590A JPH0441210A (en) | 1990-06-07 | 1990-06-07 | Sleeve pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14967590A JPH0441210A (en) | 1990-06-07 | 1990-06-07 | Sleeve pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0441210A true JPH0441210A (en) | 1992-02-12 |
Family
ID=15480374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14967590A Pending JPH0441210A (en) | 1990-06-07 | 1990-06-07 | Sleeve pin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441210A (en) |
-
1990
- 1990-06-07 JP JP14967590A patent/JPH0441210A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2067016A1 (en) | Mold for injection molding preform with undercut lip and plastic vessel | |
| KR20040023635A (en) | Preform for small flat container and small flat container | |
| JPH0441210A (en) | Sleeve pin | |
| JPS6096434A (en) | Injection blow molding method | |
| US5626890A (en) | Mold for molding discs | |
| JPH09183445A (en) | Sleeve insert hinge cap | |
| TW344076B (en) | Process for producing magnet core | |
| JPH10179250A (en) | Bar-shaped cosmetic molding tool and rod-shaped cosmetic molding method | |
| JP3637448B2 (en) | Positioning structure between mouth mold and body finishing mold in glass bottle manufacturing mold | |
| JPH0535057B2 (en) | ||
| JP2001191373A (en) | Mold | |
| JPS63237922A (en) | Molding method for resin product | |
| JP2961723B2 (en) | Mold equipment | |
| JPH0635984Y2 (en) | Package tray for semiconductor devices | |
| JP3172624B2 (en) | Bottle neck structure for mounting snap-on caps and injection mold for preforms | |
| JPS6242773B2 (en) | ||
| JPH01108010A (en) | Mold | |
| JP3439572B2 (en) | Shaft barrels for writing utensils, etc. | |
| SU829439A1 (en) | Mould for making articles of foamed polymeric materials | |
| JPS63218045A (en) | Vessel made of resin having hanger and molding method thereof | |
| JP2535435Y2 (en) | Injection mold | |
| JP3509355B2 (en) | Mold device for forming caps with pins | |
| JPH03297621A (en) | Manufacture of bottle with handle | |
| JPH0671742B2 (en) | Injection molding method for molded article having male screw and injection molding apparatus for molded article | |
| JPS6034594Y2 (en) | bottle stopper |