JPH1086189A - Mold assembly for injection molding of thin molding and injection molding method - Google Patents
Mold assembly for injection molding of thin molding and injection molding methodInfo
- Publication number
- JPH1086189A JPH1086189A JP24637896A JP24637896A JPH1086189A JP H1086189 A JPH1086189 A JP H1086189A JP 24637896 A JP24637896 A JP 24637896A JP 24637896 A JP24637896 A JP 24637896A JP H1086189 A JPH1086189 A JP H1086189A
- Authority
- JP
- Japan
- Prior art keywords
- runner
- plate
- injection molding
- cavity
- mold
- 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 abstract description 23
- 238000000465 moulding Methods 0.000 title abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract 2
- 239000002861 polymer material Substances 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 108091092889 HOTTIP Proteins 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 229920006259 thermoplastic polyimide Polymers 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
-
- 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
- B29C2045/2779—Nozzles with a plurality of outlets
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、薄肉成形品射出成
形用金型装置及びこれを用いた射出成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold apparatus for injection molding a thin-walled molded product and an injection molding method using the same.
【０００２】[0002]
【従来の技術】従来の射出成形用金型装置では、高分子
材料から成る薄肉成形品、特にその厚みが０．ｌｍｍ乃
至０．８ｍｍの成形品を得ることは困難であった。ここ
で、高分子材料とは、流動性の低い熱可塑性樹脂をい
い、例えば、ポリエーテルエーテルケトン、ポリエーテ
ルサルフォン、ポリフェニレンサルファイド、熱可塑性
ポリイミド樹脂などの樹脂、及びこれらの樹脂に汎用さ
れているフィラーを混合せしめて成る樹脂組成物をい
う。これらの流動性の低い樹脂を、厚みが０．ｌｍｍ乃
至０．８ｍｍの極めて狭いキャビティ内へ均一に注入す
ることは、従来の射出成形用金型装置では困難であり、
また、このように薄い成形品のキャビティからの離型、
取出し操作も容易ではなかった。2. Description of the Related Art In a conventional injection molding die apparatus, a thin molded product made of a polymer material, particularly, having a thickness of 0.1 mm. It was difficult to obtain a molded product of 1 mm to 0.8 mm. Here, the polymer material refers to a thermoplastic resin having a low fluidity, for example, resins such as polyetheretherketone, polyethersulfone, polyphenylenesulfide, and thermoplastic polyimide resin, and are commonly used for these resins. Refers to a resin composition obtained by mixing a filler. These resins having low fluidity may be used in a thickness of 0. It is difficult to uniformly inject into a very narrow cavity of 1 mm to 0.8 mm with a conventional injection molding die apparatus,
Also, release of such a thin molded product from the cavity,
The unloading operation was not easy either.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記の問題
点を解決するためなされたものであり、その目的とする
ところは、流動性の低い高分子材料から成る薄肉成形品
を、高い仕上がり精度で、歩留りも良く、効率良く成形
することのできる射出成形用金型装置及びこれを用いた
射出成形方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a thin molded article made of a polymer material having low fluidity and a high finish. An object of the present invention is to provide a mold apparatus for injection molding capable of performing molding with high accuracy, good yield, and high efficiency, and an injection molding method using the same.
【０００４】[0004]
【課題を解決するための手段】本発明者らは上記課題を
解決するために鋭意検討した結果、肉厚が０．８ｍｍ以
下の薄肉成形品の射出成形用金型装置において、固定側
取付け板にランナーストリッパプレートを介して取り付
けられ、ランナー及びこれから分岐する口径０．ｌｍｍ
以上、０．８ｍｍ以下の４個以上のゲートが形成された
ランナープレートと、可動側取付け板に取り付けられ、
キャビティを形成する形状板とを有する金型機構を内蔵
したことを特徴とする射出成形用金型装置によって、前
記の目的を達成できることを見出した。薄肉成形品の肉
厚が０．８ｍｍ以下の場合には、上記ゲートを４個以上
形成したランナープレートを用いることが望ましく、ま
た、型開き時に、成形品をキャビティから離脱せしめ、
一時的にランナープレート側に残すために、上記形状板
に、キャビティのランナープレートと対向する面に開口
するエアーエジェクト孔を形成することが推奨される。Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, in a mold apparatus for injection molding of a thin-walled molded product having a thickness of 0.8 mm or less, a fixed-side mounting plate is provided. Is attached to the runner via a runner stripper plate, and the runner and the branch having a diameter of 0.1 mm. lmm
As described above, a runner plate having four or more gates of 0.8 mm or less and a movable side mounting plate are attached to the runner plate.
It has been found that the above-mentioned object can be achieved by an injection molding die apparatus having a built-in die mechanism having a shape plate forming a cavity. When the thickness of the thin molded product is 0.8 mm or less, it is desirable to use a runner plate having four or more gates formed thereon. Further, when the mold is opened, the molded product is detached from the cavity,
It is recommended to form an air eject hole in the above-mentioned shaped plate so as to be temporarily left on the side of the runner plate.
【０００５】更にまた、上記射出成形用金型装置を用い
て薄肉成形品を射出成形するに際しては、キャビティ内
への樹脂注入を、ランナープレートに形成した口径０．
ｌｍｍ以上、０．８ｍｍ以下の４個以上のゲートを通じ
て行ない、型開き時には、キャビティから離脱せしめた
成形品を一時的にランナープレート側に残すことを特徴
とする薄肉成形品の射出成形方法によって、前記目的を
達成することができる。その場合、成形品をキャビティ
から離脱せしめ、ランナープレート側に一時的に残すた
めに、型開き時に、キャビティのランナープレートと対
向する面からエアーエジェクトを行なうことが推奨され
る。Further, when a thin-walled molded product is injection-molded by using the above-mentioned injection-molding mold apparatus, resin is injected into the cavity by using a bore having a diameter of 0.1 mm formed in a runner plate.
1 mm or more, through a gate of at least 0.8 mm or less, at the time of opening the mold, by the injection molding method of a thin molded product characterized by temporarily leaving the molded product detached from the cavity on the runner plate side, The above object can be achieved. In that case, it is recommended to perform air ejection from the surface of the cavity facing the runner plate when opening the mold, in order to remove the molded product from the cavity and temporarily leave it on the runner plate side.
【０００６】[0006]
【発明の実施の形態】以下、図面を参照しつゝ本発明を
具体的に説明する。図１は、本発明に係る薄肉成形品の
射出成形用金型装置の一実施例の要部を示す概略断面
図、図２ないし図４はその作動を示す説明図である。図
中、１は固定側取付け板、２はランナーストリッパプレ
ート、３はランナープレート、４はロケートリング、５
はスプルブシュ、６はホットランナーマニホールド、７
はホットチップ、８は固定側取付け板、９は形状板、９
ｄは入れ子、１０ａは薄肉成形品、１０ｂはコールドス
ラッグ、ＰＬ１〜３は第１〜第３パーティングラインで
ある。ランナープレート３には、ランナー３ａとこれか
ら分岐する４個以上のゲート３ｂが形成されている。ま
た、形状板９には、キャビティ９ａと、エアーエジェク
ト孔９ｂ及びエアー供給孔９ｃが形成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic sectional view showing a main part of an embodiment of a mold apparatus for injection molding of a thin molded product according to the present invention, and FIGS. 2 to 4 are explanatory views showing the operation thereof. In the figure, 1 is a fixed side mounting plate, 2 is a runner stripper plate, 3 is a runner plate, 4 is a locate ring, 5
Is a sprue bush, 6 is a hot runner manifold, 7
Is a hot tip, 8 is a fixed side mounting plate, 9 is a shape plate, 9
d is a nest, 10a is a thin molded product, 10b is a cold slug, and PL1 to PL3 are first to third parting lines. The runner plate 3 is formed with a runner 3a and four or more gates 3b branched from the runner 3a. The shape plate 9 has a cavity 9a, an air eject hole 9b, and an air supply hole 9c.
【０００７】ゲート３ｂのキャビティへの開口部の最小
口径は通常０．ｌｍｍ以上、０．８ｍｍ以下に設定され
る。本発明者らの経験では肉厚が０．２ｍｍの成形品を
成形する場合はゲートの最小口径は０．２ｍｍが好まし
く、肉厚が０．５ｍｍの成形品を成形する場合はゲート
の最小口径は０．５ｍｍが好ましい。ゲートの最小口径
が０．８ｍｍを越えると、成形品の離型時に樹脂の一部
がゲートの内部に残存し、残留物の除去作業が必要とな
る。また、ゲートの最小口径が０．１ｍｍ未満では、流
動性の低い樹脂の注入を円滑に行なうことができない。The minimum diameter of the opening of the gate 3b to the cavity is usually 0.1 mm. It is set to 1 mm or more and 0.8 mm or less. According to the experience of the present inventors, when molding a molded product having a thickness of 0.2 mm, the minimum aperture of the gate is preferably 0.2 mm, and when molding a molded product having a thickness of 0.5 mm, the minimum aperture of the gate is preferred. Is preferably 0.5 mm. If the minimum diameter of the gate exceeds 0.8 mm, part of the resin will remain inside the gate when the molded product is released, and it will be necessary to remove the residue. If the minimum diameter of the gate is less than 0.1 mm, the resin having low fluidity cannot be smoothly injected.
【０００８】薄肉成形品の肉厚が０．８ｍｍ以下の場合
には、口径が０．ｌｍｍ以上、０．８ｍｍ以下のゲート
３ｂを４個以上有するランナープレートを用いるのが好
ましい。ゲートの数が少ないと、キャビティへの樹脂注
入が不均一になりやすく、また、キャビティから離脱せ
しめた成形品を一時的にランナープレート３の側へ残す
のが困難になる。従って、成形品の形状及び樹脂の流動
性に応じて、ゲートの数を適宜調整して、型開き時に成
形品がランナープレート側に残るようにする。[0008] When the thickness of the thin molded article is 0.8 mm or less, the diameter of the thin molded article is 0.3 mm. It is preferable to use a runner plate having four or more gates 3b of 1 mm or more and 0.8 mm or less. If the number of gates is small, resin injection into the cavity tends to be non-uniform, and it is difficult to temporarily leave the molded product detached from the cavity on the side of the runner plate 3. Therefore, the number of gates is appropriately adjusted according to the shape of the molded product and the fluidity of the resin so that the molded product remains on the runner plate side when the mold is opened.
【０００９】以下、樹脂の注入から成形品の取出しまで
の操作を説明する。先ず、図１に示すように型を閉じた
状態で、ホットチップ７から溶融樹脂を押出し、ランナ
ープレート３のランナー３ａ及び複数のゲート３ｂを通
じてキャビティ９ａ内に樹脂を注入する。その後、必要
に応じ、更に型締めを行ない、キャビティの隅々まで樹
脂を行き渡らせた後、所定時間冷却して、樹脂を硬化さ
せる。Hereinafter, the operation from the injection of the resin to the removal of the molded product will be described. First, as shown in FIG. 1, the molten resin is extruded from the hot chip 7 with the mold closed, and the resin is injected into the cavity 9a through the runner 3a of the runner plate 3 and the plurality of gates 3b. Thereafter, if necessary, the mold is further clamped to spread the resin to all corners of the cavity, and then cooled for a predetermined time to cure the resin.
【００１０】然る後、図２に示す如く、可動側取付け板
８を引き下げ、第１パーティングラインＰＬ１において
型開きを行なう。このとき、キャビティ９ａの底面（ラ
ンナープレートと対向する面）に開口する複数のエアー
エジェクト孔９ｂからエアーを噴き出させ、成形品１０
ａのキャビティからの離脱を容易ならしめる。これによ
り、成形品１０ａはゲートやランナー内の樹脂（コール
ドスラッグ）１０ｂと共にランナープレート３の側に付
着した状態で残ることになる。Thereafter, as shown in FIG. 2, the movable mounting plate 8 is pulled down, and the mold is opened at the first parting line PL1. At this time, air is blown out from a plurality of air eject holes 9b opened on the bottom surface (the surface facing the runner plate) of the cavity 9a, and the molded product 10 is formed.
a can be easily separated from the cavity. As a result, the molded product 10a is left attached to the runner plate 3 together with the resin (cold slug) 10b in the gate and the runner.
【００１１】次いで、図３に示す如く、ランナープレー
ト３を引き下げ、第２パーティングラインＰＬ２におい
て型開きを行なう。然るときは、成形品１０ａがコール
ドスラッグ１０ｂから分離されると共に、コールドスラ
ッグ１０ｂはホットチップ７の側に残る。これにより、
ランナー３ａ及びゲート３ｂ内の樹脂は完全に取り除か
れる。Next, as shown in FIG. 3, the runner plate 3 is pulled down, and the mold is opened at the second parting line PL2. If so, the molded article 10a is separated from the cold slug 10b, and the cold slug 10b remains on the side of the hot chip 7. This allows
The resin in the runner 3a and the gate 3b is completely removed.
【００１２】最後に、図４に示す如く、ランナーストリ
ッパプレート２を引き下げ、第３パーティングラインＰ
Ｌ３において型開きを行なう。然るときは、コールドス
ラッグ１０ｂがホットチップ７の先端から分離される。
そこで、成形品１０ａとコールドスラッグ１０ｂを適宜
の手段で型外に排出し、回収する。Finally, as shown in FIG. 4, the runner stripper plate 2 is lowered, and the third parting line P
The mold is opened at L3. If so, the cold slug 10b is separated from the tip of the hot tip 7.
Therefore, the molded product 10a and the cold slug 10b are discharged out of the mold by an appropriate means and collected.
【００１３】[0013]
【発明の効果】本発明は、上記の如く構成されるから、
本発明によるときは、公知の熱可塑性樹脂を用いて薄肉
の成形品を、高精度に、歩留りよく、高効率に製造する
ことができる。この薄肉の成形品は玩具（絵柄組合せパ
ズルなど）や学習用文字、数字などとして広く利用する
ことができる。また、エアーエジェクトにより離型を行
なうことにより、押上板、押上ピンによる突出し機構を
必要としない射出成形が可能となる。The present invention is configured as described above,
According to the present invention, a thin molded product can be manufactured with high precision, high yield, and high efficiency by using a known thermoplastic resin. This thin molded article can be widely used as toys (such as picture combination puzzles), learning letters, numbers, and the like. In addition, by performing mold release by air ejection, injection molding that does not require a protrusion mechanism using a push-up plate and push-up pins becomes possible.
【図１】本発明に係る薄肉成形品の射出成形用金型装置
の一実施例の要部を示す概略断面図である。FIG. 1 is a schematic sectional view showing a main part of an embodiment of a mold apparatus for injection molding of a thin molded product according to the present invention.
【図２】第１パーティングラインにおける型開き作動を
示す断面説明図である。FIG. 2 is an explanatory sectional view showing a mold opening operation in a first parting line.
【図３】第２パーティングラインにおける型開き作動を
示す断面説明図である。FIG. 3 is an explanatory sectional view showing a mold opening operation on a second parting line.
【図４】第３パーティングラインにおける型開き作動を
示す断面説明図である。FIG. 4 is an explanatory sectional view showing a mold opening operation in a third parting line.
１ 固定側取付け板 ２ ランナーストリッパプレート ３ ランナープレート ３ａ ランナー ３ｂ ゲート ４ ロケートリング ５ スプルブシュ ６ ホットランナーマニホールド ７ ホットチップ ８ 可動側取付け板 ９ 形状板 ９ａ キャビティ ９ｂ エアーエジェクト孔 ９ｃ エアー供給孔 ９ｄ 入れ子 １０ａ 薄肉成形品 １０ｂ コールドスラッグ ＰＬ１〜３ 第１〜第３パーティングライン Reference Signs List 1 fixed side mounting plate 2 runner stripper plate 3 runner plate 3a runner 3b gate 4 locate ring 5 sprue bush 6 hot runner manifold 7 hot tip 8 movable side mounting plate 9 shaped plate 9a cavity 9b air eject hole 9c air supply hole 9d nest 10a thin Molded product 10b Cold slug PL1-3 First to third parting line
Claims (3)
ａ）の射出成形用金型装置において、固定側取付け板
（１）にランナーストリッパプレート（２）を介して取
り付けられ、ランナー（３ａ）及びこれから分岐する口
径０．ｌｍｍ以上、０．８ｍｍ以下の４個以上のゲート
（３ｂ）が形成されたランナープレート（３）と、可動
側取付け板（８）に取り付けられ、キャビティ（９ａ）
を形成し、キャビティ（９ａ）のランナープレートと対
向する面に開口するエアーエジェクト孔（９ｂ）を具備
した形状板（９）とを有する金型機構を内蔵したことを
特徴とする射出成形用金型装置。1. A thin-walled molded product having a thickness of 0.8 mm or less (10
In the mold apparatus for injection molding shown in FIG. 1A, the runner (3a) is mounted on the fixed-side mounting plate (1) via a runner stripper plate (2), and the runner (3a) and the branch having a diameter of 0.1 mm. A runner plate (3) on which four or more gates (3b) of 1 mm or more and 0.8 mm or less are formed, and a movable-side mounting plate (8), and a cavity (9a)
And a built-in mold mechanism having a shape plate (9) having an air eject hole (9b) opened on a surface of the cavity (9a) facing the runner plate. Mold device.
ａ）を射出成形するに際し、請求項１に記載の射出成形
用金型装置を用い、キャビティ（９ａ）内への樹脂注入
を、ランナープレート（３）に形成した口径０．ｌｍｍ
以上、０．８ｍｍ以下の４個以上のゲート（３ｂ）を通
じて行ない、型開き時には、キャビティ（９ａ）から離
脱せしめた成形品（１０ａ）を一時的にランナープレー
ト（３）側に残すことを特徴とする薄肉成形品の射出成
形方法。2. A thin-walled molded product having a thickness of 0.8 mm or less (10
When the injection molding of the step (a) is performed, the resin is injected into the cavity (9a) by using the injection molding die apparatus according to claim 1, and the resin is injected into the runner plate (3). lmm
As described above, the process is performed through four or more gates (3b) of 0.8 mm or less, and when the mold is opened, the molded product (10a) detached from the cavity (9a) is temporarily left on the runner plate (3) side. Injection molding method for thin-walled molded products.
ープレートと対向する面からエアーエジェクトを行なう
ことにより、肉厚が０．８ｍｍ以下の薄肉成形品（１０
ａ）をキャビティ（９ａ）から離脱せしめ、ランナープ
レート（３）側に一時的に残す請求項２に記載の薄肉成
形品の射出成形方法。3. When the mold is opened, air is ejected from the surface of the cavity (9a) opposed to the runner plate to form a thin molded product (10 mm or less) having a thickness of 0.8 mm or less.
The injection molding method for a thin-walled molded product according to claim 2, wherein a) is detached from the cavity (9a) and is temporarily left on the runner plate (3) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24637896A JPH1086189A (en) | 1996-09-18 | 1996-09-18 | Mold assembly for injection molding of thin molding and injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24637896A JPH1086189A (en) | 1996-09-18 | 1996-09-18 | Mold assembly for injection molding of thin molding and injection molding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1086189A true JPH1086189A (en) | 1998-04-07 |
Family
ID=17147658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24637896A Pending JPH1086189A (en) | 1996-09-18 | 1996-09-18 | Mold assembly for injection molding of thin molding and injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1086189A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9908272B2 (en) | 2013-03-12 | 2018-03-06 | Sabic Global Technologies B.V. | Thin wall application with injection compression molding and in-mold roller |
| CN111941765A (en) * | 2020-08-19 | 2020-11-17 | 衢州康润智能控制***有限公司 | Induction identification equipment for injection mold |
-
1996
- 1996-09-18 JP JP24637896A patent/JPH1086189A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9908272B2 (en) | 2013-03-12 | 2018-03-06 | Sabic Global Technologies B.V. | Thin wall application with injection compression molding and in-mold roller |
| CN111941765A (en) * | 2020-08-19 | 2020-11-17 | 衢州康润智能控制***有限公司 | Induction identification equipment for injection mold |
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