JPS6225026A - Injection molding method - Google Patents
Injection molding methodInfo
- Publication number
- JPS6225026A JPS6225026A JP16493185A JP16493185A JPS6225026A JP S6225026 A JPS6225026 A JP S6225026A JP 16493185 A JP16493185 A JP 16493185A JP 16493185 A JP16493185 A JP 16493185A JP S6225026 A JPS6225026 A JP S6225026A
- Authority
- JP
- Japan
- Prior art keywords
- gate
- mold
- product cavity
- product
- cavity
- 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 title claims description 12
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 2
- 239000012768 molten material Substances 0.000 abstract description 14
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 238000010008 shearing Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic 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
- B29C45/38—Cutting-off equipment for sprues or ingates
-
- 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
- B29C45/2681—Moulds with rotatable mould parts
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2703—Means for controlling the runner flow, e.g. runner switches, adjustable runners or gates
Abstract
Description
【発明の詳細な説明】
〈産業−［−の利用分野〉
本発明は、製品キャビティ及び少なくとも該キャビティ
に連通し溶融樹脂材料（以下［溶融材料」という）の流
路となるスプルー及びゲートを旦備した成形用金型を用
いる射出成形方法に関する〈従来の技術〉
射出成形方法には、離型後における成形品の製品部から
のゲート部の切断除去を不要とする見頃から、例えば、
第６図に示すような金型を用いる、下記のような方法が
あった（特開昭５２−１３３０２９り公報参照）。Detailed Description of the Invention <Industry - Field of Application> The present invention is directed to a product cavity and at least a sprue and a gate that communicate with the cavity and serve as a flow path for a molten resin material (hereinafter referred to as "molten material"). <Prior art> Regarding an injection molding method using a molding mold equipped with a mold, the injection molding method has a method that eliminates the need to cut and remove the gate part from the product part of the molded product after demolding, for example,
There was the following method using a mold as shown in FIG. 6 (see Japanese Patent Application Laid-open No. 52-133029).
金型は、製品キャビティ２１を構成する［−型１及び下
型２とからなり、製品キャビティ２１に？■通し溶融材
料の流路となるスプルー２２、ランナー２３及びゲート
２４を備えている。そして、製品キャビティ２１のゲー
） ｒ−＋ ２５を月＋Ｌ−ｉｉｆ能にゲートシールピ
ン（封Ｗ部材）３が材料流入方向に向って往復移可俺に
配設され、ゲートシールビン３はシリンダ４によって駆
動されるようになっている。尚、図例中、５．６はそれ
ぞれ製品部、ランナ一部押出ビンである。The mold constitutes the product cavity 21 [- consists of a mold 1 and a lower mold 2, and forms the product cavity 21]. (2) It is equipped with a sprue 22, a runner 23, and a gate 24, which serve as a flow path for the molten material. Then, a gate seal pin (sealing W member) 3 is disposed in the product cavity 21 so that it can be reciprocated in the material inflow direction, and the gate seal pin 3 is placed in the cylinder. 4. In the figure, numerals 5 and 6 are a product section, a part of a runner, and an extrusion bottle, respectively.
この金型の製品キャビティ２１に、射出装置のノズル（
図示せず）からの溶融材料が、スプルー２２、ランナー
２３、ゲート２４を経て注入される。この注入後、溶融
材料が硬化（１，’、Ｉ化）前に（通常は注入完了直後
）、シリンダ４を作動させてゲートシールピン３で、製
品キャビティ２１のゲ−ト［１２５を封１トする。この
状態で製品キャビティ？１内の溶融材料の硬化を完了さ
せ、続いて型開きして押出ピン５．６によりそれぞれ製
品部及びランナ一部（スプル一部も含めて）別々に突き
出し離型を行なう。The nozzle of the injection device (
Molten material (not shown) is injected through sprue 22, runner 23, and gate 24. After this injection, before the molten material hardens (1,', I) (usually immediately after injection is completed), the cylinder 4 is actuated to seal the gate [125 of the product cavity 21 with the gate seal pin 3]. to Product cavity in this state? After the molten material in 1 is completely cured, the mold is opened and the product part and part of the runner (including part of the sprue) are ejected separately using extrusion pins 5 and 6 to release the mold.
〈発明が解決しようとする問題点〉
本発明層らは−［−配力法で射出成形を繰り返したとこ
ろ、下記のような問題点があることを見い出した。<Problems to be Solved by the Invention> When the present inventors repeated injection molding using the -[- force distribution method, they found the following problems.
（ａ）シールビン３をゲート口面に向って作動させてゲ
ート口２５を封止する。即ちゲート材料を製品キャビテ
ィ２１に圧入しながら、ゲート１−」２５の封！Ｌを行
なうため、Ｍｌｌ−が完全に行なわれがたく、ゲート部
が残存することがある。これは、ゲート部の切断除去を
必要とし、ゲート口をＭＩヒした意味がなくなる。(a) The gate opening 25 is sealed by operating the seal bottle 3 toward the gate opening surface. That is, while press-fitting the gate material into the product cavity 21, the gate 1-'' 25 is sealed! Since L is performed, it is difficult to completely perform Mll-, and a gate portion may remain. This necessitates cutting and removing the gate portion, which eliminates the meaning of MI-heating the gate opening.
（ｂ）１−記の如く、ゲート材料が注入完了後の製品キ
ャビティ２１に強制的に押し込まれる形となるため、ゲ
ー） ＋：＋ ２５近傍の成形品表面に材料流れ傷（フ
ローマーク）が発生しやすい。(b) As shown in 1-, since the gate material is forced into the product cavity 21 after injection is completed, material flow marks (flow marks) are formed on the surface of the molded product near the gate 25. Likely to happen.
（Ｃ）ゲートシールピン３の先端（封止壁面）はゲート
口周縁壁に対して垂直方向に衝突して、ゲ−） ｎ ２
５をＭ Ｉｆ：するため、封止壁面が摩耗したり損傷し
たりしやすい。(C) The tip of the gate seal pin 3 (sealing wall surface) collides with the peripheral wall of the gate opening in the vertical direction, resulting in a gap) n 2
5 to M If:, the sealing wall surface is likely to be worn or damaged.
く問題点を解決するための手段〉
本発明者らは、上記問題点を解決すべく、鋭意開発に努
力した結果、金型の製品キャビティに溶融材料を注入後
、溶融材料が硬化前に、製品キャビティのゲート［１を
月ｌヒした状態で、製品午ヤビテイ内の溶融材料を硬化
させ、続いて型開きして離型を行なう射出成形方法にお
いて、ゲートを備えた入れ子を回転運動又はスライド運
動させて。Means for Solving the Problems In order to solve the above problems, the present inventors have made extensive efforts in development, and as a result, after injecting the molten material into the product cavity of the mold, before the molten material hardens, In an injection molding method in which the molten material in the product cavity is hardened with the gate of the product cavity heated, and then the mold is opened and released, the nest with the gate is rotated or slid. Let me exercise.
入れ子の一壁面でせん断方向にゲート口の封ＩＦを行な
えばよいことを見い出し、本発明を完成した〈実施例〉
以下、本発明の実施例を、図例に基づいて説明する。な
お、従来例と同一部分については、同−同符号を付して
説明を省略する。The present invention was completed by discovering that it is sufficient to seal the gate opening in the shear direction on one wall surface of the nest.Embodiments Hereinafter, embodiments of the present invention will be described based on illustrated examples. Note that the same parts as those in the conventional example are given the same reference numerals and the description thereof will be omitted.
（１）第１実施例（第１〜３図）
この実施例は円筒状の製品に適用した例で、用いる金型
は、図例の如＜、ｉ−＋ｆ板７が取り付けられた下型２
Ａに、ゲート２４及びランナー２３を備えた入れ子８が
回転可能に支持されたものである。入れ子８の下部はピ
ニオンギア１０とされ、該ピニオンギア１０はラック１
１とがみ合うようになっている。ラック１１はシリンダ
１２によって駆動されるようになっている。(1) First embodiment (Figures 1 to 3) This embodiment is an example applied to a cylindrical product, and the mold used is a lower mold with an i-+f plate 7 attached as shown in the figure. 2
A nest 8 including a gate 24 and a runner 23 is rotatably supported. The lower part of the nest 8 is a pinion gear 10, and the pinion gear 10 is connected to the rack 1.
It is designed to mesh with 1. The rack 11 is adapted to be driven by a cylinder 12.
次に、この金型を用いての射出成形方法を説明する。Next, an injection molding method using this mold will be explained.
射出装置からの溶融材料は、スプルー２２、ランナー２
３及びゲート２４を経て、金型の製品キャビティ１１に
注入される。この注入後、溶融材料が硬化前に（通常は
注入′完了直後）、シリンダ１２を作動させてラック１
１を駆動してピニオンギア１０を回転させ、即ち入れ子
８を回転させる。すると第２図に示すように、ゲート２
４は製品キャビティ２Ｉとの連通状態が解除されると同
時に、入れ子８の上端壁面（−壁面）で製品キャビティ
２１のゲート口２５が月１される。このとき、ゲート２
５の封止、即ち、材料切断は、せん断方向に行なわれる
ため、ゲート材料の製品キャビティへの圧入はなく、さ
らにはゲート口２５の封止も完全である。また、ｊ４１
ト作用はせん断で行なわれるため、材料の硬化が完了前
ならその時期は任意である（従来の圧入的に封ＩＬを行
なう場合は、材料波動性が良好な注入完了直後でないと
４４ ｉｔができない）。The molten material from the injection device is transferred to the sprue 22 and runner 2.
3 and gate 24, it is injected into the product cavity 11 of the mold. After this injection, and before the molten material hardens (usually immediately after injection is complete), cylinder 12 is actuated to
1 to rotate the pinion gear 10, that is, to rotate the nest 8. Then, as shown in Figure 2, gate 2
4 is disconnected from the product cavity 2I, and at the same time, the gate opening 25 of the product cavity 21 is opened at the upper end wall surface (-wall surface) of the nest 8. At this time, gate 2
Since the sealing in step 5, that is, the cutting of the material, is performed in the shear direction, there is no press-fitting of the gate material into the product cavity, and furthermore, the gate opening 25 is completely sealed. Also, j41
Since the shearing action is performed by shearing, it can be done at any time as long as the hardening of the material is not completed. ).
この状態で製品キャビティ２１内の溶融材料の硬化を完
了させ、続いて型開きして押出ピン５゜６によりそれぞ
れ製品部及びランナ一部を別々に突き出し離型を行なう
。In this state, the hardening of the molten material in the product cavity 21 is completed, and then the mold is opened and the product part and a part of the runner are ejected separately using the extrusion pins 5 and 6 to release the mold.
（２）第２実施例（第４〜５図）
円筒状の製品に適用した例で、かつ、入れ子８Ａをシリ
ンダ１３で駆動されるスライド部材としたものである、
この金型を用いた場合の射出成形方法は、第１実施例の
場合と同様である。この実施例では、入れ子８Ａの駆動
機構が筒中であるが、製品形状が第１実施例の場合の如
く、角筒状の場合は、ゲート［］を封止するために入れ
子８Ａのスライド量を大きくとる必要がある。(2) Second embodiment (FIGS. 4 and 5) This is an example applied to a cylindrical product, and the nest 8A is a sliding member driven by a cylinder 13.
The injection molding method using this mold is the same as in the first embodiment. In this embodiment, the drive mechanism of the nest 8A is inside the cylinder, but if the product shape is a rectangular tube like in the first embodiment, the sliding amount of the nest 8A may be adjusted to seal the gate [ ]. It needs to be large.
なお、上記各実施例は１いずれもアンダーゲート方式で
、かつ−個どりの金型を用いた例であるが、サイドゲー
ト方式や、多数個どりの金型にも、本発明の射出成形方
法は、勿論適用できる。また、金型の材料流路も、スプ
ルーとゲートが直結した、ランナーレスタイプであって
もよい、さらには、樹脂材料には熱可塑性に限られず、
熱硬化性のものも含まれる。Note that each of the above embodiments is an example in which an under-gate method is used and multiple molds are used, but the injection molding method of the present invention can also be applied to a side-gate method or multiple molds. can of course be applied. In addition, the material flow path of the mold may be a runnerless type in which the sprue and the gate are directly connected.Furthermore, the resin material is not limited to thermoplastic.
It also includes thermosetting ones.
〈発明の効果〉
本発明の射出成形方法は、上記の如く、金型への材料注
入完了後、材料硬化前における製品キャビティのゲート
口の封止を、入れ子の一壁面でせん断方向に行なうため
、下記のような効果を奏する。<Effects of the Invention> As described above, the injection molding method of the present invention seals the gate opening of the product cavity in the shear direction on one wall surface of the nest after the injection of the material into the mold is completed and before the material hardens. , has the following effects.
（１）従来の如く、製品キャビティ内に溶融材料を押し
込むようにしてゲート［１を封＋Ｌ Ｌないため、ゲー
ト１１の封１１−が完全に行なわれやすく、＃型持ゲー
ト部が残存するおそれがない。(1) Unlike conventional methods, since the gate [1] is not sealed by pushing the molten material into the product cavity, the gate 11 is easily sealed 11- completely, and there is a risk that the #-shaped gate portion may remain. There is no.
（２）ゲート材料が、注入完了後の製品キャビティに強
制的に押し込まれることなく、従来の如く、それが原因
でゲート口近傍の成形品製品部の表面に材料流れ傷（フ
ローマーク）が発生することがない。(2) The gate material is not forcibly pushed into the product cavity after injection is completed, as in the past, which causes material flow marks (flow marks) on the surface of the molded product near the gate opening. There's nothing to do.
（３）ゲート【１の封ｌにを、入れ子の一壁面でせん断
方向に行なうだけなので、封Ｗ壁面が従来の如く、ゲー
ト口周縁壁に対して垂直方向に衝突することなく、封＋
Ｌ壁面が摩耗したり損傷するおそれがほとんどない。(3) Since the sealing of the gate [1] is only performed in the shearing direction on one wall surface of the nest, the sealing W wall surface does not collide with the peripheral wall of the gate opening in the perpendicular direction, as in the conventional case.
There is almost no risk of wear or damage to the L wall surface.
第１〜５図は本発明の射出成形方法に示す金ηＪを示し
、第１図は第３図のＩ−Ｉ線矢視断面図、第２図は第１
図において入れ子を回動させてゲート口を封止した状態
の部分図、第３図は第１実施例に使用する金型の概略断
面図、第４図は第５図の■−■線矢視断面図、第５図は
第２実施例に使用する金型の概略部分断面図、第６図は
従来方法に使用した金型の概略断面図、第６図Ａは第６
図においてゲートロ封＋ｈ時のＡ部の拡大断面図である
。
ｌ・・・Ｌ型、
２．２Ａ・・・下型、
８．８Ａ・・・入れ子、
２１・・・製品キャビティ、
２２・・・スプルー、
２３・・・ランナー、
２４・・・ゲート、
２５・・・ゲート【１゜
特 許 出 願 人
つ■合成株式会社
代 理 人1 to 5 show gold ηJ shown in the injection molding method of the present invention, FIG. 1 is a sectional view taken along the line II in FIG. 3, and FIG.
In the figure, a partial view of the state in which the nest is rotated to seal the gate opening, Figure 3 is a schematic cross-sectional view of the mold used in the first embodiment, and Figure 4 is the arrow marked by the ■-■ line in Figure 5. 5 is a schematic partial sectional view of the mold used in the second embodiment, FIG. 6 is a schematic sectional view of the mold used in the conventional method, and FIG.
FIG. 2 is an enlarged sectional view of part A when the gate is closed +h in the figure. l... L type, 2.2A... lower mold, 8.8A... nest, 21... product cavity, 22... sprue, 23... runner, 24... gate, 25 ...Gate [1゜Patent application person ■ Gosei Co., Ltd. Agent
Claims (1)
融樹脂材料の流路となるスプルー及びゲートを具備した
成形用金型を用い、 前記製品キャビティに溶融樹脂材料を注入後、該溶融樹
脂材料が硬化前に、前記製品キャビティのゲート口を封
止した状態で、前記溶融樹脂材料の硬化を完了させ、続
いて型開きして離型を行なう射出成形方法において、 前記製品キャビティのゲート口の封止を、ゲートを有す
る入れ子を回転運動又はスライド運動させて、入れ子の
一壁面でせん断方向に行なうことを特徴とする射出成形
方法。[Claims] Using a molding die equipped with a product cavity and at least a sprue and a gate communicating with the cavity and serving as a flow path for the molten resin material, after injecting the molten resin material into the product cavity, the molten resin is In an injection molding method, the curing of the molten resin material is completed with the gate opening of the product cavity sealed before the material hardens, and the mold is subsequently opened and released. An injection molding method characterized in that the sealing is performed on one wall surface of the nest in the shear direction by rotating or sliding a nest having a gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16493185A JPS6225026A (en) | 1985-07-25 | 1985-07-25 | Injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16493185A JPS6225026A (en) | 1985-07-25 | 1985-07-25 | Injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6225026A true JPS6225026A (en) | 1987-02-03 |
Family
ID=15802558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16493185A Pending JPS6225026A (en) | 1985-07-25 | 1985-07-25 | Injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6225026A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01310926A (en) * | 1988-06-09 | 1989-12-15 | Shinko Serubitsuku:Kk | Mold for molding resin |
| JP2007001054A (en) * | 2005-06-21 | 2007-01-11 | Ipm:Kk | Injection molding mold and injection molding method |
| EP1923195A1 (en) * | 2006-11-16 | 2008-05-21 | AKO-Kunstoffe Alfred Kolb GmbH | Method and device for avoiding projections and depressions during injection moulding |
| JP2015131454A (en) * | 2014-01-15 | 2015-07-23 | オイレス工業株式会社 | Gate-cutting device for injection molding device |
| KR20150003993U (en) * | 2014-04-22 | 2015-11-02 | (주)아모레퍼시픽 | Mold for injection molding having runner to prevent flow mark |
| CN114851486A (en) * | 2022-06-15 | 2022-08-05 | 昆山金莓电子有限公司 | Large-stroke side core-pulling mold structure of rack without disengaging gear |
-
1985
- 1985-07-25 JP JP16493185A patent/JPS6225026A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01310926A (en) * | 1988-06-09 | 1989-12-15 | Shinko Serubitsuku:Kk | Mold for molding resin |
| JP2007001054A (en) * | 2005-06-21 | 2007-01-11 | Ipm:Kk | Injection molding mold and injection molding method |
| EP1923195A1 (en) * | 2006-11-16 | 2008-05-21 | AKO-Kunstoffe Alfred Kolb GmbH | Method and device for avoiding projections and depressions during injection moulding |
| JP2015131454A (en) * | 2014-01-15 | 2015-07-23 | オイレス工業株式会社 | Gate-cutting device for injection molding device |
| KR20150003993U (en) * | 2014-04-22 | 2015-11-02 | (주)아모레퍼시픽 | Mold for injection molding having runner to prevent flow mark |
| CN114851486A (en) * | 2022-06-15 | 2022-08-05 | 昆山金莓电子有限公司 | Large-stroke side core-pulling mold structure of rack without disengaging gear |
| CN114851486B (en) * | 2022-06-15 | 2023-09-05 | 昆山汇美塑胶模具工业有限公司 | Large-stroke side core-pulling die structure with rack not separated from gear |
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