JP3265923B2 - Injection compression molding method and apparatus - Google Patents

Injection compression molding method and apparatus

Info

Publication number
JP3265923B2
JP3265923B2 JP16089195A JP16089195A JP3265923B2 JP 3265923 B2 JP3265923 B2 JP 3265923B2 JP 16089195 A JP16089195 A JP 16089195A JP 16089195 A JP16089195 A JP 16089195A JP 3265923 B2 JP3265923 B2 JP 3265923B2
Authority
JP
Japan
Prior art keywords
injection
mold clamping
mold
filling
nut
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.)
Expired - Fee Related
Application number
JP16089195A
Other languages
Japanese (ja)
Other versions
JPH0911298A (en
Inventor
昭男 岡本
Original Assignee
宇部興産株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宇部興産株式会社 filed Critical 宇部興産株式会社
Priority to JP16089195A priority Critical patent/JP3265923B2/en
Publication of JPH0911298A publication Critical patent/JPH0911298A/en
Application granted granted Critical
Publication of JP3265923B2 publication Critical patent/JP3265923B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/46Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56Means 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
    • B29C45/561Injection-compression moulding
    • B29C2045/563Enlarging the mould cavity during injection

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】本発明は、低圧型締の金型キャビ
ティ内に溶融樹脂を充填し、充填された樹脂圧によって
金型が若干型開し、その後型締機構で金型を高圧に圧縮
するようにした射出圧縮成形方法および射出圧縮成形装
置に関するものである。
BACKGROUND OF THE INVENTION The present invention relates to a method of filling a mold cavity of a low-pressure mold with a molten resin, slightly opening the mold by the filled resin pressure, and then increasing the mold pressure by a mold clamping mechanism. TECHNICAL FIELD The present invention relates to an injection compression molding method and an injection compression molding apparatus which are designed to compress.
【0002】[0002]
【従来の技術】油圧式の型締シリンダで型締を行なう型
締機構の射出成形装置を用いて射出成形する場合、下記
に示すような手順により実施していた。 (1)型締機構にストッパなどを設けて、金型を所定の
型開量位置でストッパにより機械的にロックさせる。あ
るいは射出充填により金型が開く後退量をストッパによ
り制限する。射出充填後の型締圧縮工程は、ストッパに
よる機械的ロックを解除して行なう。または、別途付設
した圧縮専用の型締シリンダなどで圧縮工程を行なう。 (2)型締機構の可動盤と固定盤の間に圧縮専用のユニ
ットを装着し、型開量保持ならびに圧縮工程を装着した
ユニットで行なう。 (3)可動盤または可動型の位置を検出し、射出充填に
より金型が容易に開くように低い型締力で型締を行な
う。射出充填工程は設定した型開量および型開速度にな
るように、型締圧力あるいは射出速度を制御する。
2. Description of the Related Art Injection molding using an injection molding apparatus of a mold clamping mechanism for clamping with a hydraulic mold clamping cylinder has been performed according to the following procedure. (1) A stopper or the like is provided in the mold clamping mechanism, and the mold is mechanically locked by the stopper at a predetermined mold opening position. Alternatively, the amount of retreat of the mold to be opened by injection filling is limited by a stopper. The mold compression process after injection filling is performed by releasing the mechanical lock by the stopper. Alternatively, the compression step is performed by using a separately provided compression-clamping cylinder or the like. (2) A unit dedicated to compression is mounted between the movable platen and the fixed platen of the mold clamping mechanism, and the unit is provided with a mold opening holding and compression process. (3) The position of the movable platen or movable mold is detected, and mold clamping is performed with a low mold clamping force so that the mold is easily opened by injection filling. In the injection filling step, the mold clamping pressure or the injection speed is controlled so that the set mold opening amount and the mold opening speed are obtained.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな射出成形を行なう場合には下記に示すような種々の
問題がある。 (1)成形中に樹脂温度などの成形条件が変動した場合
の対応が困難であるため、成形品の品質にバラツキが生
じ、良品を安定して供給することはできない。また、射
出充填から圧縮工程に移行する際にタイムラグが生じる
ため、金型内の樹脂流動挙動が不連続となり、その結
果、フローマークなどの欠陥が生じ、高品質な成形品を
得ることは困難である。さらに、機械的ロック機構ある
いは圧縮専用の型締シリンダなどの付設により、成形機
は複雑・大型化となり、その結果、生産性は著しく低下
する。
However, when such injection molding is performed, there are various problems as described below. (1) Since it is difficult to cope with a change in molding conditions such as a resin temperature during molding, the quality of a molded product varies, and a good product cannot be supplied stably. In addition, since a time lag occurs during the transition from the injection filling to the compression process, the flow behavior of the resin in the mold becomes discontinuous, resulting in defects such as flow marks, and it is difficult to obtain a high-quality molded product. It is. Further, the addition of a mechanical locking mechanism or a mold-clamping cylinder dedicated to compression increases the complexity and size of the molding machine, resulting in a significant decrease in productivity.
【0004】(2)成形機本体は何ら大幅な改造は必要
としないものの、圧縮専用ユニットを装着することによ
り、金型を取付可能な有効寸法が縮小され(成形機のス
ペックダウン)、その結果、多岐にわたる成形品への対
応が限定されてしまう。また、圧縮専用ユニットは相当
な重量物であり、ユニット装着によって、成形機の変形
や摺動部の異常摩耗、駆動系への負担増などの成形機へ
与えるダメージは大きい。さらに、ユニットの駆動源の
接続、成形機との動作タイミングをとるための制御信号
の接続などを必要とし、操作性は極めて低い。
[0004] (2) Although the molding machine body does not require any major remodeling, the installation of the compression-only unit reduces the effective dimension in which a mold can be mounted (specification of the molding machine is reduced). Therefore, the correspondence to a wide variety of molded products is limited. Further, the compression-only unit is a considerably heavy object, and when the unit is mounted, damage to the molding machine such as deformation of the molding machine, abnormal wear of the sliding portion, and increased load on the drive system is large. Further, it requires connection of a drive source of the unit, connection of a control signal for obtaining operation timing with the molding machine, and the like, and operability is extremely low.
【0005】(3)あらかじめ型締力を負荷させた状態
で射出充填を行なうため、型締力<射出充填による樹脂
圧となるまでは型開挙動を示さず、その結果、型開挙動
の前後で金型キャビティ内の樹脂流動状態が変化し、上
記(1)の場合程ではないが、フローマークなどの欠陥
が生じやすい。そのため、型開挙動が容易となるように
極めて小さい型締力を設定する方法が考えられるが、こ
の場合には、過大な型開挙動が生じないように型締力あ
るいは射出速度を厳密に制御する必要があり、その結
果、極めて高い制御応答性、制御精度が要求されるた
め、制御システムの複雑化・高度化によるコスト高、操
作性の低下を招く。
(3) Since injection filling is performed in a state in which a mold clamping force is applied in advance, the mold opening behavior is not exhibited until the mold clamping force <resin pressure due to the injection filling. As a result, before and after the mold opening behavior As a result, the flow state of the resin in the mold cavity changes, and although not as large as in the case of (1), defects such as flow marks tend to occur. Therefore, a method of setting an extremely small mold clamping force to facilitate the mold opening behavior can be considered, but in this case, the mold clamping force or the injection speed is strictly controlled so that excessive mold opening behavior does not occur. As a result, extremely high control responsiveness and control accuracy are required, which leads to an increase in cost and operability due to the complexity and sophistication of the control system.
【0006】[0006]
【課題を解決するための手段】このような課題を解決し
て、不必要な成形機の大型化による生産性の低下を避
け、型締力と射出圧力の簡単な圧力制御で、高品質な成
形品を安定して供給するために、本発明の方法では、固
定盤と可動盤および連結板がタイバーの軸線方向に配置
され、可動盤と連結板との間に半割りナットを装着し、
かつ、タイバーには該半割りナットと嵌合するネジ部ま
たは溝部を配設し、固定盤には移動シリンダおよびタイ
バーと連接された型締シリンダが固設され、移動シリン
ダで可動盤を固定盤方向に進退動させるとともに、型締
シリンダで可動盤を固定盤側に押圧させて型締力を負荷
させる型締機構を用いて射出圧縮成形を行なうに際し
て、前記移動シリンダで可動盤を固定盤側へ前進させて
両金型がタッチした状態で前記半割りナットをタイバー
上のネジ部または溝部に噛合・固定させた後、樹脂の冷
却固化収縮量を加算した樹脂量を金型キャビティ内に射
出充填可能な射出圧力制御の射出充填工程と前記型締シ
リンダで樹脂の冷却固化収縮量に相当する型開量位置ま
で射出充填によって金型が開くことを許容する型締力を
負荷させる型締工程とを連動して同時に行ない、射出充
填完了を検知した後、前記型締シリンダの型締力を増圧
させて圧縮工程を行なうこととした。
Means for Solving the Problems To solve such problems, it is possible to avoid unnecessary reduction in productivity due to an increase in the size of a molding machine, and to achieve high quality by simple pressure control of mold clamping force and injection pressure. In order to stably supply molded articles, in the method of the present invention, the fixed platen and the movable platen and the connecting plate are arranged in the axial direction of the tie bar, and a half nut is mounted between the movable platen and the connecting plate.
Further, the tie bar is provided with a screw portion or a groove portion to be fitted with the half nut, and the fixed plate is fixedly provided with a moving cylinder and a mold clamping cylinder connected to the tie bar. When performing injection compression molding using a mold clamping mechanism that applies a mold clamping force by moving the movable platen toward the fixed platen with the mold clamping cylinder while moving the movable platen in the direction, the movable platen is moved by the moving cylinder to the fixed platen side. After the mold is touched and the two halves are touched, the half nut is engaged and fixed to the thread or groove on the tie bar, and then the resin amount obtained by adding the cooling, solidification and shrinkage of the resin is injected into the mold cavity. Injection filling process of injection pressure control capable of filling and a mold clamping process of applying a mold clamping force that allows the mold to be opened by injection filling to a mold opening amount corresponding to the amount of cooling, solidification and shrinkage of the resin in the mold clamping cylinder. The carried conjunction with simultaneously, after detecting the injection filling completion, it was decided to carry out the compression step by boosted the clamping force of the mold clamping cylinder.
【0007】また、第2の発明の装置では、固定盤と可
動盤および連結板がタイバーの軸線方向に配置され、可
動盤と連結板との間に装着される半割りナットを有し、
かつ、タイバーには該半割りナットと嵌合するネジ部ま
たは溝部が配設され、固定盤には移動シリンダおよびタ
イバーと連接され型締シリンダとが固設された型締機構
を備え、射出充填量設定部と射出圧力設定部と前記ふた
つの設定部の設定値に基づいて射出充填を行なう射出制
御部を備え、樹脂の冷却固化収縮量に相当する型開量ま
で射出充填によって金型が開くことを許容する型締力を
設定する型締力設定部と該型締力設定部の設定値に基づ
いて型締を行なう型締制御部を具備するとともに、半割
りナットがタイバー上のネジ部または溝部へ噛合・固定
されたことを検知する半割りナット固定検知部と該半割
りナット固定検知部の検出信号に基づいて前記射出制御
部へ射出開始信号を発信し前記型締制御部へ型締開始信
号を発信する比較制御部と射出充填完了を検知する射出
充填完了検知部と該射出充填完了検知部の検出信号に基
づいて起動するタイマと圧縮工程における型締増圧開始
時間を設定する時間設定部と該時間設定部の設定値と前
記タイマのタイムアウト信号を比較して前記型締制御部
へ型締増圧開始信号を発信させる時間制御部とを有する
構成とした。
In the apparatus of the second invention, the fixed platen, the movable platen and the connecting plate are arranged in the axial direction of the tie bar, and have a half nut mounted between the movable platen and the connecting plate.
In addition, the tie bar is provided with a screw portion or a groove portion to be fitted with the half nut, and the fixed plate is provided with a mold clamping mechanism connected to the moving cylinder and the tie bar and fixedly provided with a mold clamping cylinder. An injection control unit that performs injection filling based on the set values of the amount setting unit, the injection pressure setting unit, and the two setting units is provided, and the mold is opened by injection filling up to the mold opening amount corresponding to the amount of cooling, solidification, and shrinkage of the resin. A mold clamping force setting unit that sets a mold clamping force that allows the mold clamping force to be set, and a mold clamping control unit that performs mold clamping based on the set value of the mold clamping force setting unit. Alternatively, a half-nut fixing detector that detects engagement and fixing to the groove and an injection start signal is transmitted to the injection controller based on a detection signal of the half-nut fixing detector, and a mold is sent to the mold clamping controller. Comparison that sends a closing start signal Control section, an injection filling completion detecting section for detecting the completion of injection filling, a timer started based on a detection signal of the injection filling completion detecting section, a time setting section for setting a mold clamping pressure increasing start time in the compression step, and the time setting. And a time control unit for comparing the set value of the unit with a timeout signal of the timer and transmitting a mold clamping pressure increasing start signal to the mold clamping control unit.
【0008】[0008]
【作用】本発明は以上のように構成されており、半割り
ナットをタイバー上のネジ部または溝部に噛合・固定さ
せた後、射出充填工程と型締工程を連動して同時に行な
うことにより、半割りナットと可動盤は半割りナットの
駆動がスムーズに行なえるように両金型の厚さ(ダイハ
イト値)をネジ部または溝部のピッチから算出される、
未だ隙間を有している状態であり、換言すれば、半割り
ナットと可動盤が当接するまでは未だ型締力は負荷され
ていない状態であるので、射出充填による型開挙動は充
填初期から容易かつ連続的に起こり、その結果、金型キ
ャビティ内の樹脂流動状態も連続的な広がりを示す。
The present invention is constructed as described above. After the half nut is engaged with and fixed to the thread or groove on the tie bar, the injection filling step and the mold clamping step are simultaneously performed in conjunction with each other. For the half nut and movable plate, the thickness (die height value) of both molds is calculated from the pitch of the screw or groove so that the half nut can be driven smoothly.
It is still in a state that has a gap, in other words, the mold clamping force is not yet applied until the half nut and the movable plate abut, so the mold opening behavior by injection filling is from the initial stage of filling. It occurs easily and continuously, and as a result, the flow state of the resin in the mold cavity also shows a continuous spread.
【0009】さらに、樹脂の冷却固化収縮量を加えた樹
脂量を充填し、かつ、冷却固化収縮量に相当する型開量
を許容する型締力を負荷することにより、射出充填完了
時において、金型へ樹脂はほぼ満充填(ジャストパッ
ク)の状態であるため、金型内の樹脂流動の不連続に起
因するフローマークなどの欠陥発生の影響を全く受けな
い。その結果、従来必要とされた型締力および射出充填
の複雑かつ高度な制御システムは不要となる上に、圧縮
工程において、射出充填完了を検知してから型締圧力を
増圧させることができるので、型締増圧開始の難しいタ
イミング制御も不要となるため、制御の操作性は極めて
容易となる。また、射出充填工程時は充填可能な圧力制
御とすることで充填初期には金型のキャビティ内の樹脂
流動抵抗が小さいため高速充填となり、充填後期には樹
脂流動抵抗が大きくなるので充填速度は自然減速される
ため、樹脂充填中は自動的に連続的な速度勾配をもち、
かつパック圧を生じない理想的な自然充填流れ(ナチュ
ラルフロー)となり、その結果、射出充填制御の操作性
も極めて容易となる。さらに、型締動作と射出充填動作
を同時に行なうことにより、成形サイクルの短縮が図ら
れ、生産性が大幅に向上する。
Further, by filling a resin amount to which the amount of cooling solidification shrinkage is added and applying a mold clamping force that allows a mold opening amount corresponding to the amount of cooling solidification shrinkage, at the time of completion of injection filling, Since the mold is almost completely filled with resin (just pack), the mold is not affected at all by the occurrence of defects such as flow marks caused by discontinuous resin flow in the mold. As a result, a complicated and sophisticated control system of the mold clamping force and injection filling conventionally required is not required, and further, the mold clamping pressure can be increased after the completion of the injection filling is detected in the compression process. Therefore, it is not necessary to perform the timing control that makes it difficult to start increasing the mold clamping pressure. In addition, during the injection filling step, the filling pressure is controlled so that the resin flow resistance in the mold cavity is small at the initial stage of filling, so that high-speed filling is performed. Because it is naturally decelerated, it has a continuous speed gradient automatically during resin filling,
In addition, an ideal natural filling flow (natural flow) that does not generate a pack pressure is obtained. As a result, the operability of the injection filling control becomes extremely easy. Furthermore, by simultaneously performing the mold clamping operation and the injection filling operation, the molding cycle can be shortened, and the productivity is greatly improved.
【0010】[0010]
【実施例】以下図面に基づいて本発明の実施例の詳細に
ついて説明する。図1〜図3は本発明に係り、図1は射
出圧縮成形装置の全体構成図、図2は成形動作の工程手
順図、図3は射出圧縮成形方法の射出充填・型締動作説
明図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 relate to the present invention, FIG. 1 is an overall configuration diagram of an injection compression molding apparatus, FIG. 2 is a process procedure diagram of a molding operation, and FIG. 3 is an explanatory diagram of an injection filling / clamping operation of an injection compression molding method. is there.
【0011】射出圧縮成形装置100は、図1に示すよ
うに、型締装置1、射出装置40および制御装置60か
ら構成されている。型締装置1は、移動シリンダ2、型
締シリンダ3、タイバー7、固定盤10、ネジ噛合調整
装置11、可動盤20、半割りナット22、タイバー係
止装置26、固定金型30a、可動金型30bおよび連
結板50などから構成され、固定金型30aの中央の凹
部に可動金型30bの中央の凸部が嵌装され、摺動自在
に進退動できるようになっている。符号5aはピストン
ロッド室、8はネジ部(または溝部)、28は金型キャ
ビティである。
As shown in FIG. 1, the injection compression molding apparatus 100 includes a mold clamping device 1, an injection device 40, and a control device 60. The mold clamping device 1 includes a moving cylinder 2, a mold clamping cylinder 3, a tie bar 7, a fixed plate 10, a screw engagement adjusting device 11, a movable plate 20, a half nut 22, a tie bar locking device 26, a fixed mold 30a, and a movable metal. It is composed of a mold 30b, a connecting plate 50, and the like. A central convex portion of the movable mold 30b is fitted in a central concave portion of the fixed mold 30a, so that the movable mold 30b can move forward and backward slidably. Reference numeral 5a denotes a piston rod chamber, 8 denotes a screw portion (or groove portion), and 28 denotes a mold cavity.
【0012】つぎに、射出装置40について述べる。本
実施例における射出装置40はバレル41内にスクリュ
42が配設され、ホッパ43内の樹脂原料が供給ゾー
ン、圧縮ゾーンにおいて加熱圧縮され、計量ゾーンにお
いて溶融計量され、そして射出ゾーンを経てノズル44
内へ射出されるように構成されている。そして、バレル
41の外周面には樹脂原料を外部加熱するためのヒータ
が設けられており、樹脂原料がスクリュ42の回転によ
って前方へ送られるようになっている。符号46は射出
シリンダ、47は正逆転用モータであってスクリュ42
に直結されており、スクリュ42を正逆回転するように
なっている。
Next, the injection device 40 will be described. In the injection device 40 in this embodiment, a screw 42 is provided in a barrel 41, and a resin material in a hopper 43 is heated and compressed in a supply zone and a compression zone, melted and weighed in a measurement zone, and passed through an injection zone to a nozzle 44.
It is configured to be injected into the interior. A heater for externally heating the resin material is provided on the outer peripheral surface of the barrel 41, and the resin material is sent forward by the rotation of the screw 42. Reference numeral 46 denotes an injection cylinder, and 47 denotes a forward / reverse rotation motor.
, So that the screw 42 rotates forward and backward.
【0013】次に、制御装置60について述べる。制御
装置60は、射出充填量設定部61、射出圧力設定部6
2、射出制御部63、油圧制御弁64、型締力設定部6
5、型締制御部66、時間制御部67、油圧制御弁6
8、油圧供給源68a、68b、射出充填完了検出部6
9、タイマ70、時間設定部71、比較制御部72、半
割りナット固定検知部73などから構成されている。
Next, the control device 60 will be described. The control device 60 includes an injection filling amount setting unit 61, an injection pressure setting unit 6,
2. Injection control unit 63, hydraulic control valve 64, mold clamping force setting unit 6
5, mold clamping control section 66, time control section 67, hydraulic control valve 6
8, hydraulic pressure supply sources 68a, 68b, injection filling completion detection unit 6
9, a timer 70, a time setting unit 71, a comparison control unit 72, a half nut fixing detection unit 73, and the like.
【0014】射出制御部63は、射出充填量設定部61
と射出圧力設定部62に接続されるとともに、油圧制御
弁64を介して正逆転用モータ47の動作を制御する図
示しない制御装置に接続されるとともに、型締制御部6
6や時間制御部67や比較制御部72とも接続される。
一方、型締制御部66は型締力設定部65と接続される
とともに、射出シリンダ46の射出充填完了検出部69
とタイマ70や時間制御部67を介して接続され、油圧
制御弁68を介して型締シリンダ3に制御指令を発信す
る。時間制御部67は時間設定部71に接続され、射出
制御や型締制御の際の時間制御を行なう。半割りナット
固定検出部73は、半割りナット開閉シリンダ26と接
続され半割りナット22の開閉を検知して比較制御部7
2へ検知信号を発信する。
The injection control unit 63 includes an injection filling amount setting unit 61
And an injection pressure setting unit 62, and is connected to a control device (not shown) for controlling the operation of the forward / reverse rotation motor 47 via a hydraulic control valve 64.
6, the time control unit 67, and the comparison control unit 72.
On the other hand, the mold clamping control unit 66 is connected to the mold clamping force setting unit 65 and the injection filling completion detecting unit 69 of the injection cylinder 46.
And a control command is transmitted to the mold clamping cylinder 3 through a hydraulic control valve 68. The time control unit 67 is connected to the time setting unit 71 and performs time control in injection control and mold clamping control. The half nut fixing detector 73 is connected to the half nut opening / closing cylinder 26, detects opening and closing of the half nut 22, and detects the opening and closing of the half nut 22.
2 sends a detection signal.
【0015】以上のように構成された射出圧縮成形装置
100の作動について述べる。まず、通常行なわれる型
締動作や取出動作の確認を済ませた後、試験成形運転を
行なう。この試験成形運転では通常数回の「捨て打ち」
と呼ばれる試し打ちを行ない、樹脂の特性に応じた射出
充填量、射出圧力および型締圧力の適正値を把握して条
件設定の情報を得る。試験成形運転で条件設定した後、
生産成形運転を行なう。具体的には、図2に示すような
操作手順にしたがって、以下の手順どおり実施する。 (1)移動シリンダ2で可動盤20を固定盤10側へ移
動前進させ、両金型30a、30bがタッチした後、移
動シリンダ2の駆動を停止させる。 (2)半割りナット開閉シリンダ26を駆動させて、半
割りナット22とタイバー7のネジ部または溝部を完全
に噛合・固定させる。ここで、前以て、両金型30a、
30bの金型厚さ(ダイハイト値)とネジ部または溝部
のピッチから、半割りナット22とタイバー7のネジ部
または溝部が完全に噛合するように、あらかじめチェー
ンによって連結されたモータを回転させることにより、
スプロケットを回転させ、調整軸の前後進移動量を調整
しておく。 (3)半割りナット22とタイバー7のネジ部または溝
部が完全に噛合・固定されたかどうかを半割りナット固
定検知部73で検知した後、比較制御部72は型締制御
部66へ型締開始信号を、射出制御部63へ射出開始信
号を各々発信して、型締動作と射出動作を連動して同時
に行なう。この時点では、すなわち、半割りナット22
がタイバー7のネジ部または溝部へ噛合・固定された時
点では、半割りナット22の駆動が容易となるように、
半割りナット22と可動盤は、未だダイハイト値とネジ
部または溝部のピッチから算出される隙間を有した状態
であるので、この場合の型締動作はタイバー7とタイバ
ー7に噛合・固定された半割りナット22を固定盤10
側へ引抜くようにスライド前進させて、半割りナット2
2が可動盤20に当接した後、型締力が負荷されること
となる。したがって、射出充填初期には未だ型締力が全
く負荷されていないので、射出充填による型開挙動は極
めて顕著に生じ、充填初期から連続的な型開挙動を示
す。すなわち、金型キャビティ28内の樹脂は極めて低
圧状態で充填されるため、充填による樹脂の圧力偏差は
極めて小さい状態が得られ、これによって、変形や反り
などの変形防止効果が一層助長される。また、型開動作
と射出動作を同時に行なうことにより、成形サイクル短
縮が達成できる。
The operation of the injection compression molding apparatus 100 configured as described above will be described. First, after confirming the normally performed mold clamping operation and unloading operation, a test molding operation is performed. This test molding operation usually involves several “throwing-out”
Is performed, and the appropriate values of the injection filling amount, the injection pressure and the mold clamping pressure according to the characteristics of the resin are grasped to obtain information on the condition setting. After setting conditions in test molding operation,
Perform production molding operation. Specifically, the operation is performed according to the following procedure according to the operation procedure as shown in FIG. (1) The movable platen 20 is moved forward by the movable cylinder 2 toward the fixed platen 10 side, and after the two dies 30a and 30b touch, the drive of the movable cylinder 2 is stopped. (2) The half nut opening / closing cylinder 26 is driven to completely mesh and fix the half nut 22 and the screw portion or groove portion of the tie bar 7. Here, in advance, both molds 30a,
Rotating a motor previously connected by a chain so that the half nut 22 and the screw or groove of the tie bar 7 are completely meshed with each other based on the mold thickness (die height value) of 30b and the pitch of the screw or groove. By
Rotate the sprocket to adjust the amount of forward / backward movement of the adjustment shaft. (3) After detecting whether the screw portion or groove portion of the half nut 22 and the tie bar 7 are completely engaged and fixed by the half nut fixing detecting portion 73, the comparison control portion 72 transmits the mold clamping control portion 66 to the mold clamping control portion 66. A start signal is transmitted to the injection control unit 63, and the mold clamping operation and the injection operation are simultaneously performed simultaneously. At this point, the half nut 22
Is engaged with and fixed to the screw portion or groove portion of the tie bar 7 so that the driving of the half nut 22 is facilitated.
Since the half nut 22 and the movable platen still have a gap calculated from the die height value and the pitch of the screw portion or the groove portion, the mold clamping operation in this case is engaged and fixed to the tie bar 7 and the tie bar 7. Fix the split nut 22 to the fixed platen 10
Slide forward so that it is pulled out to the side, and split the nut 2
After the 2 comes into contact with the movable platen 20, a mold clamping force is applied. Therefore, since no mold clamping force has been applied yet at the initial stage of injection filling, the mold opening behavior due to injection filling occurs extremely remarkably, and the mold opening behavior is continuous from the initial stage of filling. That is, since the resin in the mold cavity 28 is filled under a very low pressure state, a state in which the pressure deviation of the resin due to the filling is extremely small is obtained, and the effect of preventing deformation such as deformation and warpage is further promoted. Further, by simultaneously performing the mold opening operation and the injection operation, the molding cycle can be shortened.
【0016】(4)射出充填工程は、射出充填量設定部
61で設定した金型キャビティ28容積に樹脂物性に応
じて算出される樹脂の冷却固化収縮量を加えた樹脂量の
計量値と、射出圧力設定部62で設定した金型キャビテ
ィ28内へ充填可能でバリを発生しない射出充填圧力範
囲から射出効率の最も良い射出圧力条件の1圧の射出圧
力値に基づいて行なう。これにより、射出初期には金型
キャビティ28内の流動抵抗が小さいので高速充填とな
り、射出後期には金型キャビティ28内の流動抵抗の増
加に伴い、充填速度は自然減速し、その結果、連続的な
速度勾配を有し、かつパック圧を発生しない理想的な自
然充填流れ(ナチュラルフロー)が自動的に得られる。 (5)型締工程は、型締力設定部65で設定した樹脂の
冷却個化収縮量に相当する型開量まで金型が開くことを
許容する型締力値に基づいて行なう。なお設定型締力値
への到達は射出完了前までに行なわれ、射出完了までは
設定型締力値を保持するように制御する。こうすること
により、樹脂の冷却固化収縮量を加えた樹脂量の計量値
による射出充填制御と併せて、射出充填完了時におい
て、金型キャビティ28への樹脂はほぼ満充填(ジャス
トパック)の状態であるので、金型キャビティ28内の
樹脂流速の不連続に起因するフローマークなどの欠陥発
生は皆無となる。その結果、射出充填完了を検知した
後、型締増圧による圧縮工程へ移行が可能となるので、
従来必要とされていた型締増圧開始の高度なタイミング
制御が不要となるので、制御システムの簡略化によって
操作性が極めて容易となる。
(4) The injection filling step comprises measuring the resin amount obtained by adding the cooling solidification shrinkage amount of the resin calculated according to the resin properties to the volume of the mold cavity 28 set by the injection filling amount setting section 61; The injection pressure is set based on one injection pressure value of the injection pressure condition with the best injection efficiency from the injection filling pressure range that can be filled into the mold cavity 28 and does not generate burrs set by the injection pressure setting unit 62. As a result, in the early stage of the injection, the flow resistance in the mold cavity 28 is small, so that the filling is performed at a high speed. In the late stage of the injection, the filling speed is naturally reduced due to the increase in the flow resistance in the mold cavity 28. An ideal natural filling flow (natural flow) having a specific velocity gradient and generating no pack pressure is automatically obtained. (5) The mold clamping process is performed based on a mold clamping force value that allows the mold to be opened up to the mold opening amount corresponding to the resin cooling shrinkage amount set by the mold clamping force setting unit 65. Note that the set mold clamping force value is reached before the injection is completed, and the control is performed so that the set mold clamping force value is maintained until the injection is completed. By doing so, the injection filling control is performed based on the measured value of the resin amount to which the amount of cooling, solidification, and shrinkage of the resin is added, and when the injection filling is completed, the resin in the mold cavity 28 is almost fully filled (just pack). Therefore, there is no defect such as a flow mark caused by the discontinuity of the resin flow velocity in the mold cavity 28. As a result, after detecting the completion of injection filling, it is possible to shift to the compression step by increasing the clamping pressure,
Since advanced timing control of the start of mold clamping pressure increase, which has been conventionally required, is not required, operability becomes extremely easy by simplifying the control system.
【0017】(6)さらに、射出充填工程時には、射出
シリンダ46の圧力制御によりスクリュ42が前進限に
至るまでの、いわゆる、クッション量を残さない射切り
状態の射出制御とした。こうすることにより、射出充填
完了の検知が極めて容易かつ正確に行なえる。この状態
を図3を用いて説明する。 (7)射出充填開始点(型締開始点)Aから射出充填完
了点(タイマ起動点)Eまでは、射出充填圧力が一定と
なるようにスクリュ42の前進動作(射出速度)に応じ
て射出シリンダ46内の作動油圧は一定に制御される。
射出完了時(E点)、すなわち、スクリュ42が前進限
に達するとスクリュ42の前進動作は停止するため(射
出速度=0)、射出シリンダ46内の作動油圧値は一時
的に急上昇する。したがって、射出シリンダ46内の作
動油圧値の検出を行なうか、あるいは、スクリュまたは
ピストンの前進動作(射出速度)の検出を行なうかのい
ずれかの方法により、射出充填完了検知が正確に把握さ
れる。
(6) Further, during the injection filling step, the injection control is performed in a so-called shot-cut state without leaving a cushion amount until the screw 42 reaches the forward limit by the pressure control of the injection cylinder 46. This makes it possible to extremely easily and accurately detect the completion of injection filling. This state will be described with reference to FIG. (7) From the injection filling start point (mold clamping start point) A to the injection filling completion point (timer start point) E, the injection is performed in accordance with the forward movement (injection speed) of the screw 42 so that the injection filling pressure is constant. The working oil pressure in the cylinder 46 is controlled to be constant.
When the injection is completed (point E), that is, when the screw 42 reaches the forward limit, the forward movement of the screw 42 stops (injection speed = 0), so that the working oil pressure value in the injection cylinder 46 temporarily rises sharply. Therefore, the detection of the completion of injection filling can be accurately grasped by either detecting the operating oil pressure value in the injection cylinder 46 or detecting the forward movement (injection speed) of the screw or piston. .
【0018】(8)射出充填完了検出部69で射出充填
完了を検知するとタイマ70が起動して、タイマ70の
タイムアウト信号と時間設定部71の設定値とを時間制
御部67で判定して、圧縮工程を制御する。時間設定部
71には以下の設定値があらかじめ入力されている。す
なわち、図3において、圧縮開始時間t1 は、型締増圧
を開始して圧縮工程を行なうための経過時間であって、
射出完了直後からゲートシールするまで(計量開始)の
範囲内で設定する。計量開始時間t2 は、ゲートシール
する時間を基準とし、シャットオフバルブが組込まれて
いる成形機ではシャットオフバルブ閉動作完了時間を基
準とし、設定する。圧縮完了時間t3 は、樹脂温度や金
型冷却能力や成形品形状などにより樹脂の冷却固化時間
を算出し、保圧冷却時間(圧縮完了時間)として設定す
る。
(8) When the injection / fill completion detecting section 69 detects the injection / fill completion, the timer 70 is started, and the time control section 67 determines the time-out signal of the timer 70 and the set value of the time setting section 71. Control the compression process. The following setting values are input to the time setting unit 71 in advance. That is, in FIG. 3, the compression start time t 1 is an elapsed time for starting the mold clamping pressure increase and performing the compression step,
Set within the range from immediately after the injection is completed to the time the gate is sealed (measurement start). The metering start time t 2 is set based on the gate sealing time, and based on the shut-off valve closing operation completion time in a molding machine incorporating a shut-off valve. The compression completion time t 3 is set as a pressure-holding cooling time (compression completion time) by calculating the cooling and solidifying time of the resin based on the resin temperature, the mold cooling capacity, the shape of the molded product, and the like.
【0019】(9)圧縮開始時間t1 のタイムアウト信
号により、時間制御部67は型締制御部66へ型締増圧
開始信号を発信して型締シリンダ3で高圧型締力を負荷
する(圧縮工程)。なお、この場合、射出充填完了から
圧縮工程開始までに若干のタイムラグが生じているが、
射出充填完了時には金型キャビティ28内の樹脂はジャ
ストパック状態であることや初期の型締力が樹脂の冷却
固化収縮挙動に対応して継続的に負荷されていることに
より、フローマークなどの欠陥の発生は全くない。ま
た、射切り状態であっても、ノズル44内および金型キ
ャビティ28までの通路中には溶融樹脂が設定圧力値を
有する状態で充満されているため、圧縮工程での樹脂逆
流はほとんどない。 (10)同様に計量開始時間t2 のタイムアウト信号に
より、時間制御部67は射出制御部63へ計量開始信号
を発信させて、計量動作を開始する。また、圧縮完了時
間t3 のタイムアウト信号により、時間制御部67は型
締制御部66へ圧縮完了信号を発信させて、型開動作後
に製品取出を行なって次の成形動作へ入る。
(9) In response to the time-out signal of the compression start time t 1 , the time control section 67 sends a mold clamping pressure increasing start signal to the mold clamping control section 66 to apply a high pressure mold clamping force with the mold clamping cylinder 3 ( Compression step). In this case, a slight time lag occurs from the completion of the injection filling to the start of the compression process,
When the injection filling is completed, the resin in the mold cavity 28 is in a just-packed state, and the initial mold clamping force is continuously applied according to the cooling, solidifying, and shrinking behavior of the resin. There is no outbreak at all. Even in the shot-cut state, since the molten resin is filled in the nozzle 44 and the passage to the mold cavity 28 in a state having a set pressure value, there is almost no resin backflow in the compression step. (10) by time-out signal of the measurement start time t 2 Similarly, the time control unit 67 by transmitting a measurement start signal to the injection control unit 63 starts the measurement operation. Further, in response to the time-out signal of the compression completion time t 3 , the time control unit 67 transmits a compression completion signal to the mold clamping control unit 66 to take out the product after the mold opening operation and to start the next molding operation.
【0020】[0020]
【発明の効果】以上述べたように、本発明においては、
下記のような優れた効果を奏することができる。 (1)半割りナットをタイバーのネジ部または溝部へ噛
合・固定させた後、射出充填工程と型締工程を同時に行
なうことにより、射出充填初期には型締力は未だ負荷さ
れていない状態であるので、射出充填による型開挙動は
顕著となり、その結果、金型キャビティ内樹脂の圧力偏
差が極めて小さい状態となり、変形・反り・残留歪の極
めて小さい高品質な成形品が短い成形サイクルで得られ
る。 (2)樹脂の冷却固化収縮量を加えた樹脂量を射出充填
するとともに、冷却固化収縮量に相当する型開量まで金
型が開くことを許容する型締力設定とすることで、射出
充填完了時には溶融樹脂はジャストパック状態であるこ
とや初期の型締力が樹脂の冷却固化収縮挙動に対応して
圧縮作用を負荷していることにより、射出充填完了の後
に圧縮工程を開始することができる。その結果、圧縮工
程はタイマによる簡単な制御で良く、高品質な成形品を
極めて容易な操作で得ることができる。 (3)充填可能な射出圧力制御の射出充填により、成形
品形状に応じた連続的な速度勾配を有し、パック圧の発
生がない、かつ、短時間充填が可能な理想的な射出充填
制御が極めて簡単に自動設定できるため、制御の操作性
が極めて容易である。
As described above, in the present invention,
The following excellent effects can be obtained. (1) After the half nut is engaged and fixed to the screw portion or groove portion of the tie bar, the injection filling step and the mold clamping step are performed simultaneously, so that the mold clamping force is not yet applied at the initial stage of the injection filling. Therefore, the mold opening behavior due to injection filling becomes remarkable, and as a result, the pressure deviation of the resin in the mold cavity becomes extremely small, and a high quality molded product with extremely small deformation, warpage and residual distortion can be obtained in a short molding cycle. Can be (2) Injection filling is performed by injection-filling the amount of resin to which the amount of cooling solidification shrinkage is added, and by setting a mold clamping force that allows the mold to open to a mold opening amount corresponding to the amount of cooling solidification shrinkage. When the injection is completed, the compression process can be started after the injection filling is completed, because the molten resin is in a just-packed state and the initial clamping force applies a compression action corresponding to the cooling, solidification and shrinkage behavior of the resin. it can. As a result, the compression process requires only simple control by a timer, and a high-quality molded product can be obtained by an extremely easy operation. (3) Ideal injection filling control that has a continuous speed gradient according to the shape of the molded product, does not generate pack pressure, and can be filled in a short time by injection filling of injection pressure control that can be filled. Can be automatically set very easily, so that control operability is extremely easy.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の実施例に係る射出圧縮成形装置の全体
構成図である。
FIG. 1 is an overall configuration diagram of an injection compression molding apparatus according to an embodiment of the present invention.
【図2】本発明の実施例に係る射出圧縮成形方法におけ
る成形動作の工程手順図てある。
FIG. 2 is a process flowchart of a molding operation in an injection compression molding method according to an embodiment of the present invention.
【図3】本発明の実施例に係る射出圧縮成形方法におけ
る射出充填・型締動作説明図である。
FIG. 3 is an explanatory view of an injection filling and mold clamping operation in the injection compression molding method according to the embodiment of the present invention.
【符号の説明】[Explanation of symbols]
1 型締装置 2 移動シリンダ 3 型締シリンダ 7 タイバー 8 ネジ部(溝部) 10 固定盤(固定プラテン) 20 可動盤(可動プラテン) 22 半割りナット(ハーフナット) 26 タイバー係止装置(半割りナット開閉シリンダ) 28 金型キャビティ 30a 固定金型 30b 可動金型 40 射出装置 41 バレル 42 スクリュ 43 ホッパ 44 ノズル 46 射出シリンダ 47 正逆転用モータ 48 ピストン 60 制御装置 61 射出充填量設定部 62 射出圧力設定部 63 射出制御部 64 油圧制御弁 65 型締力設定部 66 型締制御部 67 時間制御部 68 油圧制御弁 68a 油圧供給源 68b 油圧供給源 69 射出充填完了検出部 70 タイマ 71 時間設定部 72 比較制御部 73 半割りナット固定検知部 100 射出圧縮成形装置 DESCRIPTION OF SYMBOLS 1 Mold clamping device 2 Moving cylinder 3 Mold clamping cylinder 7 Tie bar 8 Screw part (groove part) 10 Fixed platen (fixed platen) 20 Movable platen (movable platen) 22 Half nut (half nut) 26 Tie bar locking device (half nut) (Opening / closing cylinder) 28 Mold cavity 30a Fixed mold 30b Movable mold 40 Injection device 41 Barrel 42 Screw 43 Hopper 44 Nozzle 46 Injection cylinder 47 Forward / reverse rotation motor 48 Piston 60 Control device 61 Injection filling amount setting unit 62 Injection pressure setting unit 63 injection control unit 64 hydraulic control valve 65 mold clamping force setting unit 66 mold clamping control unit 67 time control unit 68 hydraulic control valve 68a hydraulic supply source 68b hydraulic supply source 69 injection filling completion detection unit 70 timer 71 time setting unit 72 comparison control Unit 73 Half nut fixing detection unit 100 Injection compression molding device

Claims (2)

    (57)【特許請求の範囲】(57) [Claims]
  1. 【請求項1】 固定盤と可動盤および連結板がタイバー
    の軸線方向に配置され、可動盤と連結板との間に半割り
    ナットを装着し、かつ、タイバーには該半割りナットと
    嵌合するネジ部または溝部を配設し、固定盤には移動シ
    リンダおよびタイバーと連接された型締シリンダが固設
    され、移動シリンダで可動盤を固定盤方向に進退動させ
    るとともに、型締シリンダで可動盤を固定盤側に押圧さ
    せて型締力を負荷させる型締機構を用いて射出圧縮成形
    を行なうに際して、 前記移動シリンダで可動盤を固定盤側へ前進させて両金
    型がタッチした状態で前記半割りナットをタイバー上の
    ネジ部または溝部に噛合・固定させた後、樹脂の冷却固
    化収縮量を加算した樹脂量を金型キャビティ内に射出充
    填可能な射出圧力制御の射出充填工程と前記型締シリン
    ダで樹脂の冷却固化収縮量に相当する型開量位置まで射
    出充填によって金型が開くことを許容する型締力を負荷
    させる型締工程とを連動して同時に行ない、 射出充填完了を検知した後、前記型締シリンダの型締力
    を増圧させて圧縮工程を行なうことを特徴とする射出圧
    縮成形方法。
    1. A fixed plate, a movable plate and a connecting plate are arranged in the axial direction of a tie bar, a half nut is mounted between the movable plate and the connecting plate, and the tie bar is fitted with the half nut. The fixed platen is fixedly provided with a moving cylinder and a mold clamping cylinder connected to the tie bar.The moving cylinder moves the movable plate toward and away from the fixed platen, and the movable platen moves with the mold clamping cylinder. When performing injection compression molding using a mold clamping mechanism that applies a mold clamping force by pressing the board toward the fixed board side, the movable cylinder is advanced to the fixed board side by the moving cylinder, and both molds are touched. After engaging and fixing the half nut to the screw portion or the groove portion on the tie bar, an injection filling step of an injection pressure control capable of injection filling a resin amount obtained by adding a cooling solidification shrinkage amount of the resin into a mold cavity; Mold clamp The mold filling process that applies the mold clamping force that allows the mold to open by injection filling up to the mold opening amount equivalent to the amount of resin cooling solidification shrinkage is performed simultaneously, and the completion of injection filling is detected. Thereafter, a compression step is performed by increasing the clamping force of the clamping cylinder to perform a compression step.
  2. 【請求項2】 固定盤と可動盤および連結板がタイバー
    の軸線方向に配置され、可動盤と連結板との間に装着さ
    れる半割りナットを有し、かつ、タイバーには該半割り
    ナットと嵌合するネジ部または溝部が配設され、固定盤
    には移動シリンダおよびタイバーと連接され型締シリン
    ダとが固設された型締機構を備え、 射出充填量設定部と、射出圧力設定部と、前記ふたつの
    設定部の設定値に基づいて射出充填を行なう射出制御部
    を備え、 樹脂の冷却固化収縮量に相当する型開量まで射出充填に
    よって金型が開くことを許容する型締力を設定する型締
    力設定部と、該型締力設定部の設定値に基づいて型締を
    行なう型締制御部を具備するとともに、 半割りナットがタイバー上のネジ部または溝部へ噛合・
    固定されたことを検知する半割りナット固定検知部と、
    該半割りナット固定検知部の検出信号に基づいて前記射
    出制御部へ射出開始信号を発信し前記型締制御部へ型締
    開始信号を発信する比較制御部と、射出充填完了を検知
    する射出充填完了検知部と、該射出充填完了検知部の検
    出信号に基づいて起動するタイマと、圧縮工程における
    型締増圧開始時間を設定する時間設定部と、該時間設定
    部の設定値と前記タイマのタイムアウト信号を比較して
    前記型締制御部へ型締増圧開始信号を発信させる時間制
    御部とを有することを特徴とする射出圧縮成形装置。
    2. A fixed platen, a movable platen and a connecting plate are arranged in the axial direction of a tie bar, and have a half nut mounted between the movable platen and the connecting plate. The fixed platen is provided with a mold clamping mechanism which is connected to the moving cylinder and the tie bar and is fixed with the mold clamping cylinder. The injection filling amount setting section and the injection pressure setting section And an injection control unit that performs injection filling based on the set values of the two setting units, and a mold clamping force that allows the mold to be opened by injection filling up to a mold opening amount corresponding to the amount of cooling, solidification, and shrinkage of the resin. And a mold clamping control unit that performs mold clamping based on the set value of the mold clamping force setting unit, and the half-split nut meshes with the screw or groove on the tie bar.
    A split nut fixing detector that detects that the nut has been fixed,
    A comparison control unit for transmitting an injection start signal to the injection control unit and transmitting a mold clamping start signal to the mold clamping control unit based on a detection signal of the half nut fixed detection unit, and an injection filling unit for detecting completion of the injection filling A completion detection unit, a timer that starts based on a detection signal of the injection filling completion detection unit, a time setting unit that sets a mold clamping pressure increase start time in a compression process, and a setting value of the time setting unit and the timer. An injection compression molding apparatus, comprising: a time control unit that compares a time-out signal and transmits a mold clamping pressure increasing start signal to the mold clamping control unit.
JP16089195A 1995-06-27 1995-06-27 Injection compression molding method and apparatus Expired - Fee Related JP3265923B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16089195A JP3265923B2 (en) 1995-06-27 1995-06-27 Injection compression molding method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16089195A JP3265923B2 (en) 1995-06-27 1995-06-27 Injection compression molding method and apparatus

Publications (2)

Publication Number Publication Date
JPH0911298A JPH0911298A (en) 1997-01-14
JP3265923B2 true JP3265923B2 (en) 2002-03-18

Family

ID=15724607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16089195A Expired - Fee Related JP3265923B2 (en) 1995-06-27 1995-06-27 Injection compression molding method and apparatus

Country Status (1)

Country Link
JP (1) JP3265923B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103450719B (en) * 2013-09-09 2015-12-23 武大巨成结构股份有限公司 A kind of long-acting aqueous, environmental protective steel construction protection coating

Also Published As

Publication number Publication date
JPH0911298A (en) 1997-01-14

Similar Documents

Publication Publication Date Title
US5266247A (en) Molding cycle control method of an injection molder
JP3265923B2 (en) Injection compression molding method and apparatus
JP2883140B2 (en) Injection molding machine filling detection method
JP3293425B2 (en) Injection low pressure molding method and apparatus
JP3265926B2 (en) Injection compression molding method and apparatus
JP3154389B2 (en) Injection press molding method and injection molding apparatus
JPH0622832B2 (en) Injection compression molding method and apparatus
JP3154385B2 (en) Injection compression molding method
JP3265934B2 (en) Injection press molding method and apparatus
JP3154386B2 (en) Injection compression molding method
JP3179305B2 (en) Injection compression molding method and apparatus
JP3154382B2 (en) Injection compression molding method and apparatus
JP3282435B2 (en) Injection press molding method and injection press molding apparatus
JP3128055B2 (en) Injection press molding method and apparatus
JP3128048B2 (en) Injection compression molding method and apparatus
JP3154379B2 (en) Injection compression molding method and apparatus
JP3371661B2 (en) Injection low pressure molding method and apparatus
JP3371663B2 (en) Injection low pressure molding method and apparatus
JP3282436B2 (en) Injection compression molding method and injection compression molding apparatus
JP3128054B2 (en) Injection press molding method and apparatus
JP3161579B2 (en) Control method of injection compression molding
JP5278111B2 (en) Injection molding machine
JP3172650B2 (en) Injection press molding method and injection press molding apparatus
JP3188908B2 (en) Injection compression molding method and apparatus
JP2913248B2 (en) Control method of injection molding machine

Legal Events

Date Code Title Description
FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080111

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090111

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090111

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100111

Year of fee payment: 8

LAPS Cancellation because of no payment of annual fees