JPS5812741A - Mold device for injection compression molding - Google Patents
Mold device for injection compression moldingInfo
- Publication number
- JPS5812741A JPS5812741A JP11177981A JP11177981A JPS5812741A JP S5812741 A JPS5812741 A JP S5812741A JP 11177981 A JP11177981 A JP 11177981A JP 11177981 A JP11177981 A JP 11177981A JP S5812741 A JPS5812741 A JP S5812741A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- compression
- plate
- cavity
- movable
- 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.)
- Granted
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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は射出圧縮成形用金型装置に関するもので、残留
歪やヒケ、転写性等の良い成型品を得ることができるよ
うにすることを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold device for injection compression molding, and an object of the present invention is to make it possible to obtain molded products with good residual strain, sink marks, transferability, etc.
従来射出圧縮成形用の金型装置に関して、種々提案され
ているが、何れも一長一短があり、完全とはいえない。Conventionally, various mold apparatuses for injection compression molding have been proposed, but all of them have advantages and disadvantages, and cannot be said to be perfect.
金型合わせ面に圧縮代を必要とするため、多くの例では
金型合わせ面の少し手前で一度可動側金型を停止させキ
ャビティ内に樹脂を充填させるので、この圧縮代に樹脂
がキャビティから漏れないようにするためにわ１々の金
型構造が提案されていた。従来の射出成形用金型装置を
そのまま射出圧縮成形用として使用すると、金型合わせ
面に圧縮代を残した状態で樹脂を射出するので圧縮代に
樹脂が流入する。従って第１図（イ）ｆこ示すように圧
縮代（１）を残し、キャビティ（２）内に樹脂が充填さ
れたあと圧縮工程に入る直前に油圧シリンダー（３）に
より切断駒（４）を移動しキャビティ（２）内と金型ラ
ンナ一部（５）及びスプル一部（６）の樹脂を切の離し
てゲートシールを行ない、次醗こ第１図中）に示すよう
に可動側金型（７）の金型合わせ面（８）を固定側金型
（９）の金型合わせ面θ０まで前進させ、キャビティ（
２）内に充填された樹脂に圧縮圧力をかける。Since a compression allowance is required at the mold mating surface, in many cases the movable mold is stopped a little before the mold mating surface and resin is filled into the cavity. A single mold structure was proposed to prevent leakage. If a conventional injection mold device is used as it is for injection compression molding, resin is injected with a compression margin left on the mold mating surfaces, so the resin flows into the compression margin. Therefore, as shown in Fig. 1(a)f, a compression allowance (1) is left, and after the cavity (2) is filled with resin, the cutting piece (4) is moved by the hydraulic cylinder (3) immediately before entering the compression process. Move and separate the resin in the cavity (2), part of the mold runner (5), and part of the sprue (6) to seal the gate, and then remove the movable side metal as shown in Figure 1). The mold mating surface (8) of the mold (7) is advanced to the mold mating surface θ0 of the stationary mold (9), and the cavity (
2) Apply compression pressure to the resin filled inside.
この場合の金型合わせ面（ｓ） Ｑ［）での樹脂漏れは
固定側金型（９）と可動側金型（７）の金型摺り合わせ
部Ｑｐの精度や寿命に関係する。又第２図（ト）に示す
例ではキャビティ（６）部の全周をコイルばね（至）を
使用したｍ１ｌｆ？漏れ防止ブロック◇Φで囲んでいる
ため、同図５こ示すようなダイレクトゲートであれば問
題ないが、第２図［Ｆ］）に示すように金型合わせ面ａ
時から樹脂を充填させる場合には構造上困難であり、ス
プルーランナー０４部にも樹脂漏れ防止ブロック０Ｑを
設ける等しなければならない。例えば第２図（ロ）では
樹脂漏れＭ止ブロック０ゆにスプルーランナ−０η部か
らキャビティ（６）部に充填するだめのゲートを作り込
み、樹脂を射出充填すると、射出成力」幾の射出圧力（
８００〜２０００１ｇ／ｃｄ ）がかかったときに樹脂
漏れ防止ブロック０１を押し付けているコイルばね０＠
の強度が射出圧力により押し戻され金型合わせ面０ｒｊ
ｌ（：隙間θ１があき、そこに樹脂が流入しキャビティ
（６）内の樹脂がａｉｊ ｉ する。又コイルばね（ハ
）のスプリング圧を射出圧力より強くしたならば樹脂漏
れは起らないが、次の圧縮工程における型締圧力は本来
必要な射出圧力からくる樹脂圧×投影面積により計算さ
れる型締力とスプリング圧を加えたものが必要となり、
ノに常に大きな型締圧力を要する。従って金型寿命、金
型構造祠等に問題が出てくる。又圧縮時にスプルーラン
ナーの圧縮代とキャビティ部の圧縮代の違いをどのよう
に修正するかという問題も残されている。In this case, resin leakage at the mold mating surface (s) Q[) is related to the accuracy and life of the mold sliding portion Qp of the stationary mold (9) and the movable mold (7). In the example shown in FIG. 2 (g), a coil spring (to) is used around the entire circumference of the cavity (6). Since it is surrounded by a leak prevention block ◇Φ, there is no problem if it is a direct gate as shown in Figure 5, but the mold mating surface a as shown in Figure 2 [F])
It is structurally difficult to fill the resin from the beginning, and a resin leakage prevention block 0Q must also be provided at the sprue runner 04. For example, in Fig. 2 (b), when a gate is made to fill the cavity (6) from the sprue runner section 0η to the resin leak stop block 0 and the resin is injected and filled, the injection force is pressure(
Coil spring 0 that presses the resin leak prevention block 01 when a load of 800 to 20001 g/cd) is applied
The strength of is pushed back by the injection pressure and the mold mating surface 0rj
l(: A gap θ1 is opened, resin flows into it, and the resin in the cavity (6) becomes aij i.Also, if the spring pressure of the coil spring (c) is made stronger than the injection pressure, resin leakage will not occur. , the mold clamping pressure in the next compression process is the sum of the mold clamping force calculated from the originally required injection pressure multiplied by the projected area and the spring pressure.
A large mold clamping pressure is always required. Therefore, problems arise in terms of mold life, mold structure, etc. There also remains the problem of how to correct the difference between the compression allowance of the sprue runner and the compression allowance of the cavity portion during compression.
本発明は上記従来例の間顕点を解決し、金型合わせ面結
合手段を具備し、圧縮工８１こおいては製品部のみ圧縮
力がかかり圧縮代は金型合わせ面以外の他の位置に設け
る構造を有した射出圧縮成形用金型装置を提供するもの
である。以下本発明を実施の一例を示す図面（第８図、
第４図）に基づいて説明する。＠３図は金型合オ〕せ面
結合手段を有する射出圧縮成形金型装置の主要部を示し
、第８図の左側は射出が行なえるようになった状態を、
右側は射出後圧縮操作を行なったときの状態を示してい
る。図において可動側取り付は板儲り、スペーサブロッ
クに）、コアプレート（ハ）は止めねじ（ハ）によって
結合されている。コアプレート（ハ）と可動側型板（ハ
）とはガイドビンに）にガイドされつつ最大６酊位まで
離れることができるようになっており、その距離αの設
定は射出圧縮成形機番こよって設定する。第３図に示さ
れていないがαは計測できるようにセンサを配置する。The present invention solves the problem of the above-mentioned conventional example, and is equipped with a means for joining the mold mating surfaces, and in the compression process 81, the compression force is applied only to the product part, and the compression amount is applied to other positions other than the mold mating surfaces. The present invention provides a mold device for injection compression molding having a structure provided in the present invention. The following drawings (Fig. 8,
The explanation will be based on FIG. 4). Figure 3 shows the main parts of the injection compression molding mold device having the mold fitting and surface coupling means, and the left side of Figure 8 shows the state in which injection can be performed.
The right side shows the state when the compression operation is performed after injection. In the figure, the movable side attachment is attached to the plate machining and the spacer block), and the core plate (C) is connected by a set screw (C). The core plate (c) and the movable mold plate (c) can be separated by a maximum of 60 degrees while being guided by a guide bin, and the setting of the distance α is determined by the injection compression molding machine number. Therefore, set it. Although not shown in FIG. 3, a sensor is arranged so that α can be measured.
（イ）は可動側型板に）と固定側型板員との金型合わせ
面一の結合手段となる油圧シリンダーで、金型合わせ面
に）が圧縮代を残して高圧型締めシリンダーが一時停止
したとき。(A) is a hydraulic cylinder that serves as a means of connecting the movable side mold plate) and the stationary side mold plate member so that the mold mating surfaces flush with each other. when it stopped.
油圧シリンダーに）のラムを前進させると金型合わせ面
に）が結合されるものである。固定側型板（ハ）と固定
側取り付は板（至）とは図外の止めねじによって結合さ
れている。固定側のモールドインサート＜１つは固定側
取り付は板に）に固定されている。エジェクタープレー
トは上板に）と下板Ｃ０より構成されており、エジェク
タービン■が補助ばね（至）とともに取り付けられてい
る。（至）はキャビティ、（ロ）はスプルーランナーで
ある。尚モールドベースとなるコアプレート（至）には
−雌にコア（２８ａ）（２８ａ）が形成され、このコア
（ｌａ）（２８ａ）は可動側型板に）にキャビティ９漫
に通じるように形成された貫通孔に）（至）内に位置す
る。When the ram () is advanced to the hydraulic cylinder, the () is connected to the mold mating surface. The fixed side template (c) and the fixed side mounting plate (to) are connected by a set screw (not shown). The mold insert on the fixed side is fixed to the plate. The ejector plate is composed of an upper plate) and a lower plate C0, and an ejector turbine (2) is attached together with an auxiliary spring (to). (To) is the cavity, and (B) is the sprue runner. In addition, cores (28a) (28a) are formed in the core plate (28a) which becomes the mold base, and this core (28a) (28a) is formed in the movable side mold plate) so as to communicate with the cavity 9. (to) the through-hole.
次に動作を第４因に基づき説明する。射出圧縮成形機の
型締めシリンダーＩこ駆動されて可動側の金型は前進し
、金型合わせ面の距離が第４図囚に示すようにｌだけ開
いた状態になると停止する。Next, the operation will be explained based on the fourth factor. The mold clamping cylinder I of the injection compression molding machine is driven and the movable mold moves forward, and stops when the distance between the mold mating surfaces becomes open by l as shown in Figure 4.
但し距離の決定はβ′として制御する方が望ましい。However, it is preferable to control the distance determination using β'.
次に前記油圧シリンダーに）を前進させると金型合わせ
面一が結合され、第４図（ト）に示すようにコアプレー
ト（ハ）と可動側型４Ｎ（２）との間にαという圧縮
代が生じる。このとき多くの場合β−β′であるが油圧
シリンダーａ７１の圧力が大きいとβ〉β′ということ
になるので、β′に調整する際この変化を考慮しておか
ねばならない。このときのαはいわば最大圧縮代で圧縮
圧が弱いとか、キャビティに）への充填量が大きい場合
には圧縮圧ｇｌｔはα以下−こなることがある、この状
態でスプルーランナー（ロ）よりキャビティに）へ溶融
樹脂を射出し充填する。ゲートシール後型締シリンダー
ラムを再び前進させて圧縮を行なう。するとコアプレー
ト（ハ）が前進して圧縮代を小さくしていく、同時にキ
ャビティ←シへモールドベース・−ト０ηが０口進する
ので圧縮成形を行なっていることになる。第４図（Ｃ）
は圧縮代が完全な圧縮によつＣ消滅している状態を示し
ている。Next, when the hydraulic cylinder () is advanced, the mating surfaces of the molds are connected, and as shown in Figure 4 (g), a compression of α is created between the core plate (c) and the movable mold 4N (2). There will be costs. At this time, in most cases, β - β', but if the pressure of the hydraulic cylinder a71 is large, β>β', so this change must be taken into account when adjusting to β'. At this time, α is the maximum compression margin, and if the compression pressure is weak or the amount of filling into the cavity is large, the compression pressure glt may be less than α.In this state, the sprue runner (B) Inject and fill the molten resin into the cavity. After the gate is sealed, the mold clamping cylinder ram is moved forward again to perform compression. Then, the core plate (c) moves forward to reduce the compression allowance, and at the same time, the mold base 0η moves toward the cavity ←, so that compression molding is performed. Figure 4 (C)
shows a state in which the compression allowance is completely compressed and C disappears.
このときは金型合せ面（イ）及びコアプレート＠と可動
側型板（ハ）の間も完全に密着している。冷却完了後、
油圧シリンダー（ハ）のラムを後退させるか油の供給を
止め、可動側の金型を型締めシリンダーで後退させると
、金型合わせ面が開かれ、製品を取り出すことができる
ようになる。At this time, the mold mating surface (A) and between the core plate @ and the movable template (C) are also in complete contact. After cooling is complete,
When the ram of the hydraulic cylinder (c) is moved back or the oil supply is stopped, and the movable mold is moved back using the mold clamping cylinder, the mold mating surface is opened and the product can be taken out.
尚金型合ｔ）せ面＠の結合手段としての油圧シリンダー
に）は図面に示す実施例では可動側型板（→内に設けら
れているが、２つの型板（イ）（坤の内固定畑型板（ハ
）側又は両方に埋設されていても良く、又２つの型板１
１こ対向するコアプレートに）及び固定側取りイ」け板
ζ１内（第８［Ａ（イ）及び←）〕に設けても良い１．
その場合固定側取り伺は板〈１内ｆこおける第８図（イ
）の位置に埋設すると、固定側ｉｌｌ’！ Ｊｆｉ ＠
μ固固定収取付け；１ｌｉｉ ＣＭとの関係が丁瓜コア
プレートに）と可動側型板（ハ）との関係になり、ガイ
ドピン（ハ）は固定側型板（ハ）と固定側取り付は板Ｃ
→にまたがって埋設される。又圧縮の際前進するコアを
モールドインサート（３）の位置で固定（１１ｉｌ取り
ｆ＝Ｊけ板Ｃ［） ｉこ一体に形成する。In addition, in the embodiment shown in the drawings, the hydraulic cylinder as a coupling means for the mold mating surface (t) is provided inside the movable side mold plate (→), but the two mold plates (a) (inside the It may be buried in the fixed field template (C) side or both, or the two templates 1
1) may be provided in the opposing core plate) and in the fixed side opening plate ζ1 (8th [A (A) and ←)].
In that case, if the fixed side is buried in the position shown in Fig. 8 (a) in the board <1, the fixed side ill'! Jfi @
μ fixed fixed installation; 1lii The relationship with the CM is between the clove core plate) and the movable side template (c), and the guide pin (c) is attached to the fixed side template (c) and the fixed side mounting. is board C
→ will be buried across. Also, the core that moves forward during compression is fixed at the position of the mold insert (3) (11ils f=J plate C[)i is formed integrally.
本発明射出圧縮成形月１金型装岡は以上述べたように実
施し得るもので、金２（ｇ合イ〕せ面に圧縮代を作らす
に、型板の何れかの後に圧縮代を作ること（こよって、
射出時にＡ−ヤビテイより樹脂が漏れることを防止し、
又圧縮時ゲート付近の金型合わせ面は閉じたままなされ
るのでキャビティの所要圧縮圧を付加することができる
特長を有している。The injection compression molding of the present invention can be carried out as described above, and in order to create a compression allowance on the mating surface of the metal 2 (G mating), a compression allowance is placed after either of the templates. To make (thus,
Prevents resin from leaking from A-yabitei during injection,
Furthermore, since the mold mating surface near the gate remains closed during compression, it has the advantage of being able to apply the required compression pressure to the cavity.
尚本発明では前記実施例１こおいて金型合わせ面の結合
手段として油圧シリンダーを用いているが、エアシリン
ダーであっても良く、又はねや電磁的なものの何れかで
あっても制限されることはない。In the present invention, although a hydraulic cylinder is used as a means for connecting the mold mating surfaces in the first embodiment, it may be an air cylinder, or it may be an electromagnetic means. It never happens.
即ちキャビティが射出時にかたく結合された２枚の型板
と、その中へ圧縮代分前進後退できるコアラ持つコアプ
レート又は固定側取り付は板等ノモールドベースとから
なっていることが大きな特徴であって、このコアを結合
しているモールドベースと型板の間に圧縮代が設定され
るところに本発明の重要性がある。In other words, the major feature is that the cavity is made up of two mold plates that are firmly connected during injection, and a core plate or a no-mold base such as a plate for fixed side mounting, which has a corer that can advance and retreat by the amount of compression. Therefore, the importance of the present invention lies in the fact that a compression margin is set between the mold base and the template that connect the core.
第１図（Ａ） Ｑ３）は第１の従来例の断面図、第２図
面及び■は＠２及び第８の従来例の断面図、第８図は本
発明の実施の一例を示す断面図、第４図色）〜Ｃ）は同
動作説明図である。
ａｎ−−・可動側取り付は板、（ハ）・・・スペーサブ
ロック、（ハ）・・・コアプレート、（イ）・・・可動
側型板、（ロ）・・・油圧シリンダー、（ハ）・・・固
定側型板、に）・・・金型合わせ面、に）・・・固定側
取り付は板、６◇・・・モールドインサート、（→・・
・上根、（ｉ：３・・・下板、＜’ｉ・・・４ヤビテイ
ー代理人 狗本楓弘Fig. 1 (A) Q3) is a cross-sectional view of the first conventional example, the second drawing and ■ are cross-sectional views of @2 and the eighth conventional example, and Fig. 8 is a cross-sectional view showing an example of implementation of the present invention. , Fig. 4) to C) are explanatory views of the same operation. an-- Movable side mounting plate, (C)...Spacer block, (C)...Core plate, (A)...Movable side template, (B)...Hydraulic cylinder, ( C)...Fixed side mold plate, 2)...Mold mating surface, 6)...Fixed side mounting plate, 6◇...Mold insert, (→...
・Kane, (i:3... Shimoita, <'i...4 Yaviti agent Kaedehiro Inumoto
Claims (1)
にイ）ずかｆこ大きくしてキャビティに溶融樹脂を射出
充填し、しかる後可動側金型を高圧型締装置：５ｔを祁
ｆｌａｔ してキャビティ内の樹脂を加圧圧縮する射出
圧縮成型に使用する金型装置であ て、可動側型板と固
定側型板を密着結合させる結合手段を具備して射出充填
から圧縮工程の間両型板を常に結合させるようにし、可
動側型板の前進による圧縮を可動側型板もしくは固定側
型板の背後薔こあるモールドベースに圧縮するコアを取
り付けてキャビティ内へ前進させることによって行なう
ように前記両型板及びモールドベースによってキャビテ
ィーを構成するようにしたことを特徴とする射出圧縮成
形用金型装置。 ２、′５Ｊ動側型板の前進による圧縮圧力がキャビティ
内の樹脂のみにかかるようにし、ゲートランナ一部が全
く圧縮されないようにゲートやランナーを構成する可動
側型板と固定側型板とを密着させ、その内の１枚に圧縮
が必要な部分ｉこおいて貫通孔を設け、その中をその背
後にあるモールドベースに取り付けられたコアが移動で
きるようにしたことを特徴とする特許請求の範囲第１項
記載の射出圧縮成形用金型装置。[Claims] 1. The cavity is made slightly larger in the thickness direction so as to leave a predetermined compression margin, and molten resin is injected and filled into the cavity, and then the movable mold is clamped under high pressure. Equipment: A mold equipment used for injection compression molding that pressurizes and compresses the resin in the cavity by flattening 5 tons, and is equipped with a coupling means to closely connect the movable side mold plate and the fixed side mold plate. During the filling and compression processes, both mold plates are always connected, and a core is attached to the movable mold base or the mold base behind the movable mold plate or the fixed mold plate to absorb the compression caused by the advancement of the movable mold plate. 1. A mold device for injection compression molding, characterized in that a cavity is constructed by both of the mold plates and the mold base by moving the mold plate forward. 2. The movable side mold plate and fixed side mold plate that make up the gate and runner are arranged so that the compression pressure due to the advancement of the 5J moving side mold plate is applied only to the resin in the cavity, and so that a part of the gate runner is not compressed at all. A patent characterized in that a through hole is formed in one of the sheets in a part that requires compression, and a core attached to a mold base behind it can move through the hole. A mold device for injection compression molding according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11177981A JPS5812741A (en) | 1981-07-16 | 1981-07-16 | Mold device for injection compression molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11177981A JPS5812741A (en) | 1981-07-16 | 1981-07-16 | Mold device for injection compression molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5812741A true JPS5812741A (en) | 1983-01-24 |
| JPS6232088B2 JPS6232088B2 (en) | 1987-07-13 |
Family
ID=14569949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11177981A Granted JPS5812741A (en) | 1981-07-16 | 1981-07-16 | Mold device for injection compression molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5812741A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59178230A (en) * | 1983-03-30 | 1984-10-09 | Nippon Plast Co Ltd | Injection-compression molding method |
| JPS6042020A (en) * | 1983-08-18 | 1985-03-06 | Matsushita Electric Ind Co Ltd | Mold device |
| JPS62200075A (en) * | 1986-02-28 | 1987-09-03 | Nok Corp | Forming method for oil seal |
| JPS63192015U (en) * | 1987-05-29 | 1988-12-12 | ||
| JPH01114409A (en) * | 1987-10-28 | 1989-05-08 | Toyoda Gosei Co Ltd | Mold for cast molding |
| WO1993024298A1 (en) * | 1992-06-02 | 1993-12-09 | Sumitomo Heavy Industries, Ltd. | Localized pressurizing type injection molding machine |
| US5405259A (en) * | 1991-06-18 | 1995-04-11 | Sumitomo Heavy Industries, Ltd. | Injection molding machine using a pulsating pressing force |
| KR100599385B1 (en) | 2004-10-06 | 2006-07-18 | 주식회사 제이엠피 | Compression molding apparatus with gate cutting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS536361A (en) * | 1976-07-08 | 1978-01-20 | Toshiba Machine Co Ltd | Mold for injection molding |
| JPS5597941A (en) * | 1979-01-22 | 1980-07-25 | Matsushita Electric Works Ltd | Injection molding die |
-
1981
- 1981-07-16 JP JP11177981A patent/JPS5812741A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS536361A (en) * | 1976-07-08 | 1978-01-20 | Toshiba Machine Co Ltd | Mold for injection molding |
| JPS5597941A (en) * | 1979-01-22 | 1980-07-25 | Matsushita Electric Works Ltd | Injection molding die |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59178230A (en) * | 1983-03-30 | 1984-10-09 | Nippon Plast Co Ltd | Injection-compression molding method |
| JPS6042020A (en) * | 1983-08-18 | 1985-03-06 | Matsushita Electric Ind Co Ltd | Mold device |
| JPH0469051B2 (en) * | 1983-08-18 | 1992-11-05 | Matsushita Electric Ind Co Ltd | |
| JPS62200075A (en) * | 1986-02-28 | 1987-09-03 | Nok Corp | Forming method for oil seal |
| JPS63192015U (en) * | 1987-05-29 | 1988-12-12 | ||
| JPH054986Y2 (en) * | 1987-05-29 | 1993-02-09 | ||
| JPH01114409A (en) * | 1987-10-28 | 1989-05-08 | Toyoda Gosei Co Ltd | Mold for cast molding |
| JPH0528968B2 (en) * | 1987-10-28 | 1993-04-28 | Toyoda Gosei Kk | |
| US5405259A (en) * | 1991-06-18 | 1995-04-11 | Sumitomo Heavy Industries, Ltd. | Injection molding machine using a pulsating pressing force |
| WO1993024298A1 (en) * | 1992-06-02 | 1993-12-09 | Sumitomo Heavy Industries, Ltd. | Localized pressurizing type injection molding machine |
| KR100599385B1 (en) | 2004-10-06 | 2006-07-18 | 주식회사 제이엠피 | Compression molding apparatus with gate cutting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6232088B2 (en) | 1987-07-13 |
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