JPH03146323A - In-mold resin pressure controller for injection molding machine - Google Patents
In-mold resin pressure controller for injection molding machineInfo
- Publication number
- JPH03146323A JPH03146323A JP28302889A JP28302889A JPH03146323A JP H03146323 A JPH03146323 A JP H03146323A JP 28302889 A JP28302889 A JP 28302889A JP 28302889 A JP28302889 A JP 28302889A JP H03146323 A JPH03146323 A JP H03146323A
- Authority
- JP
- Japan
- Prior art keywords
- gate
- resin
- pressure
- mold
- opening
- 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
- 239000011347 resin Substances 0.000 title claims abstract description 66
- 229920005989 resin Polymers 0.000 title claims abstract description 66
- 238000001746 injection moulding Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 25
- 238000002347 injection Methods 0.000 abstract description 22
- 239000007924 injection Substances 0.000 abstract description 22
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 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
- 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】
〔産業上の利用分野〕
本発明は、射出成形機の金型内にゲートを介して溶融樹
脂を射出し、射出された溶融樹脂を保圧する工程を制御
する制御装置に関し、特に、金型内の樹脂圧力を制御す
る制御装置に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control device that controls the process of injecting molten resin into a mold of an injection molding machine through a gate and holding pressure of the injected molten resin. In particular, the present invention relates to a control device for controlling resin pressure within a mold.
この種の射出成形機は、金型内にゲートを介して溶融樹
脂を射出する射出工程と、この金型内に射出された溶融
樹脂を保圧する保圧工程と、溶融樹脂を冷却する冷却工
程とによって成形品を得る。This type of injection molding machine consists of an injection process in which molten resin is injected into a mold through a gate, a pressure holding process in which the molten resin injected into the mold is kept under pressure, and a cooling process in which the molten resin is cooled. A molded product is obtained by
このようにして得られた成形品には、種々の不良品が発
生することがある。この不良品のうち、ニュートンリン
グの歪みなどの光学特性に関する不良や、そりやねじれ
などの形状に関する不良は、射出工程時と保圧工程時に
おける金型内の樹脂圧力分布が一様でないことに起因し
ている。Various types of defective products may occur in the molded products obtained in this manner. Among these defective products, defects related to optical properties such as Newton's ring distortion, and defects related to shape such as warpage and twisting are caused by uneven resin pressure distribution within the mold during the injection process and pressure holding process. It is caused by
従来、金型内の樹脂圧力分布を一様に制御する場合、射
出工程における樹脂速度の設定値と、保圧工程における
樹脂圧力の設定値を調節することによって、間接的に制
御していた。従来の射出成形機では、ゲート中を通過す
る樹脂の通過断面積は予め定められた一定の値に設定さ
れていた。Conventionally, when controlling the resin pressure distribution in the mold uniformly, it has been indirectly controlled by adjusting the set value of the resin speed in the injection process and the set value of the resin pressure in the pressure holding process. In conventional injection molding machines, the cross-sectional area of resin passing through the gate is set to a predetermined constant value.
また、レンズなどの光学製品は、射出圧縮成形によって
製造されるが、射出完了直前に金型のキャビティ全体を
急激に圧縮することによって、樹脂圧力分布の一様性を
実現している。Furthermore, optical products such as lenses are manufactured by injection compression molding, and uniform resin pressure distribution is achieved by rapidly compressing the entire mold cavity immediately before injection is completed.
上述した間接的に制御する方法では、樹脂圧力分布を一
様にするための射出工程における射出速度ならびに保圧
工程における樹脂圧力の設定値の選択が困難になるとい
う欠点がある。圧縮成形する方法は、金型のキャビティ
全体を急激に圧縮するための複雑な機構ならびに圧縮の
開始、終了の調節を必要とする。The indirect control method described above has the disadvantage that it is difficult to select the injection speed in the injection process and the set value of the resin pressure in the pressure holding process in order to make the resin pressure distribution uniform. Compression molding methods require a complex mechanism for rapidly compressing the entire mold cavity and adjustment of the start and end of compression.
また、ゲートの通過断面積を大きな値に設定すればする
程、圧力伝達特性が良好となり、これにより、樹脂圧力
分布が一様になりやすい。しかしながら、その分、保圧
及び冷却工程に要する時間とゲートを切断するための手
間が増大し、サイクルタイムが増大してしまう。Furthermore, the larger the passage cross-sectional area of the gate is set, the better the pressure transmission characteristics become, and thereby the resin pressure distribution tends to become more uniform. However, the time required for the pressure holding and cooling steps and the effort required to cut the gate increase accordingly, resulting in an increase in cycle time.
従って、本発明の課題は、サイクルタイムを増大するこ
となく、樹脂圧力分布を一様にすることによって、高品
質の成形品を製造することができる射出成形機の全型内
樹脂圧制御装置を提供することにある。Therefore, an object of the present invention is to provide a resin pressure control device for an injection molding machine that can produce high-quality molded products by making the resin pressure distribution uniform without increasing cycle time. It is about providing.
本発明による射出成形機の全型内樹脂圧制御装置は、射
出成形機の金型内にゲートを介して溶融樹脂を射出し、
該射出された溶融樹脂を保圧する工程を制御する制御装
置において、前記ゲート中を通過する前記樹脂の通過断
面積を可変調節する調節機構と、前記金型内の樹脂の圧
力を複数の位置で検出し、複数の検出圧力を出力する検
出手段と、前記複数の検出圧力分布が所定の許容値以内
となるように、前記調節機構を制御する制御手段とを有
することを特徴とする。The in-mold resin pressure control device for an injection molding machine according to the present invention injects molten resin into a mold of an injection molding machine through a gate,
The control device for controlling the process of holding pressure of the injected molten resin includes an adjustment mechanism that variably adjusts the passage cross-sectional area of the resin passing through the gate, and a control mechanism that adjusts the pressure of the resin in the mold at a plurality of positions. The present invention is characterized by comprising a detection means for detecting and outputting a plurality of detected pressures, and a control means for controlling the adjustment mechanism so that the plurality of detected pressure distributions are within a predetermined tolerance value.
以下、本発明の実施例について図面を参照して説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第１図を参照すると、本発明による全型内樹脂圧制御装
置が適用される射出成形機は、溶融樹脂を射出するため
の射出装置３と、溶融樹脂を固めて目的とする成形品を
得るための金型２とを有する。Referring to FIG. 1, the injection molding machine to which the in-mold resin pressure control device according to the present invention is applied includes an injection device 3 for injecting molten resin and solidifying the molten resin to obtain a desired molded product. It has a mold 2 for.
射出装置３では、スクリュ３Ｃを回転することにより、
溶融樹脂を加熱シリンダ３ａの先端に設けられているリ
ザーバ１に送る。この工程は、計量工程と呼ばれる。In the injection device 3, by rotating the screw 3C,
The molten resin is sent to the reservoir 1 provided at the tip of the heating cylinder 3a. This process is called the metering process.
その後、射出工程では、目標値入力装置８から入力され
た射出速度パターンに従って、制御装置１１はサーボ弁
４への操作量を決定し、サーボ弁４を操作する。この操
作により、リザーバ１内の溶融樹脂は金型２のキャビテ
ィ１０ヘゲート９を介して充填される。Thereafter, in the injection process, the control device 11 determines the operation amount to the servo valve 4 according to the injection speed pattern input from the target value input device 8, and operates the servo valve 4. By this operation, the molten resin in the reservoir 1 is filled into the cavity 10 of the mold 2 via the gate 9.
同様に、保圧工程では、目標値入力装置８から入力され
た保圧パターンに従って、制御装置１１はサーボ弁４へ
の操作量を決定し、サーボ弁４を操作する。この操作に
より、金型２のキャビティ１０に充填された溶融樹脂は
押圧される。Similarly, in the pressure holding step, the control device 11 determines the operation amount to the servo valve 4 according to the pressure holding pattern input from the target value input device 8, and operates the servo valve 4. By this operation, the molten resin filled in the cavity 10 of the mold 2 is pressed.
金型２のキャビティ１０内の樹脂の圧力分布は、射出工
程時に形成され、保圧工程で、樹脂が溶融状態の間、−
様となるように操作される。しかしながら、多くの場合
、射出工程では、樹脂の流動速度によって、射出速度パ
ターンが決定される。The pressure distribution of the resin in the cavity 10 of the mold 2 is formed during the injection process, and during the pressure holding process, while the resin is in a molten state, -
It is manipulated in such a way that However, in the injection process, the injection speed pattern is often determined by the flow rate of the resin.
そのため、そのときに形成される樹脂の圧力分布までは
、考慮されていない。金型２のキャビティ１０内の樹脂
の充填が完了すると、時間の経過ともに、樹脂が冷却し
、固化する。その為、射出工程での樹脂の圧力分布の差
が大きいと、保圧工程で樹脂の圧力分布を一様に修正す
るのが困難になる。Therefore, the pressure distribution of the resin formed at that time is not taken into account. When filling of the resin in the cavity 10 of the mold 2 is completed, the resin cools and solidifies over time. Therefore, if there is a large difference in the pressure distribution of the resin during the injection process, it becomes difficult to uniformly correct the pressure distribution of the resin during the pressure holding process.
本発明では、ゲート９ａを、その樹脂の通過断面積（開
度）が可変になるような構造にした。そして、このゲー
ト９ａの開度を調整するためのゲート開度駆動装置９を
設けた。また、金型２内に、金型２のキャビティ１０内
の樹脂の圧力をそれぞれ異なった位置で検出するための
樹脂圧センサ５及び６を取付けた。これら樹脂圧センサ
５及び６での検出圧力Ｐ、及びＰ２は、ゲート開度演算
装置７に送出される。ゲート開度演算装置７は、検出圧
力Ｐ、及びＰ２の間の差の絶対値、即ち、圧力分布１Δ
Ｐ ｌ ＝ Ｉ Ｐ＋ −Ｐ２ ＋が予め定められた
許容値以内となるようなゲート開度操作量ｉをゲート開
度駆動装置９へ送出し、ゲート９ａの開度を微−調整す
る。In the present invention, the gate 9a has a structure in which the resin passage cross-sectional area (opening degree) is variable. A gate opening driving device 9 was provided to adjust the opening of the gate 9a. Furthermore, resin pressure sensors 5 and 6 were installed in the mold 2 to detect the pressure of the resin in the cavity 10 of the mold 2 at different positions. The pressures P and P2 detected by these resin pressure sensors 5 and 6 are sent to a gate opening calculation device 7. The gate opening calculation device 7 calculates the absolute value of the difference between the detected pressures P and P2, that is, the pressure distribution 1Δ
A gate opening degree operation amount i such that P l =I P+ -P2 + is within a predetermined tolerance value is sent to the gate opening degree driving device 9 to finely adjust the opening degree of the gate 9a.
すなわち、圧力分布１ΔＰ１が許容値より大きいときは
、ゲー）９ａの開度（通過断面積）を大きくし、圧力分
布１ΔＰ１が小さくなるに従って、ゲート９ａの開度（
通過断面積）を小さくする。That is, when the pressure distribution 1ΔP1 is larger than the allowable value, the opening degree (passage cross-sectional area) of the gate 9a is increased, and as the pressure distribution 1ΔP1 becomes smaller, the opening degree (passage cross-sectional area) of the gate 9a is increased.
(passage cross-sectional area).
この結果、射出工程中において、ゲート９ａの開度を充
分大きくしておくことが可能になり、樹脂の圧力分布１
ΔＰ１を小さくすることができる。As a result, during the injection process, it becomes possible to keep the opening degree of the gate 9a sufficiently large, and the pressure distribution of the resin becomes 1.
ΔP1 can be reduced.
これにより、成形品内の圧力分布を小さくすることがで
きる。Thereby, the pressure distribution within the molded product can be reduced.
また、樹脂の圧力分布１ΔＰ１が充分小さくなった時点
で、ゲート９ａの開度を小さくした状態で、樹脂を冷却
・固化するので、従来のようにゲー）９ａの開度が大き
い場合のサイクルタイムの増大を防ぐことができる。In addition, when the pressure distribution 1ΔP1 of the resin becomes sufficiently small, the resin is cooled and solidified while the opening degree of the gate 9a is small, so the cycle time when the opening degree of the gate 9a is large is reduced. can prevent an increase in
第２図を参照して、ゲート開度駆動装置９とゲート開度
演算装置７の具体的な構成について説明する。Referring to FIG. 2, the specific configurations of the gate opening drive device 9 and the gate opening calculation device 7 will be described.
射出成形を実施するに先立って、目標値入力装置８から
全型内樹脂圧分布の許容値ΔＰ１を入力しておく。Prior to performing injection molding, an allowable value ΔP1 for the resin pressure distribution within the entire mold is inputted from the target value input device 8.
射出成形が始まると、金型２内に設置された樹脂圧セン
サ５及び６が樹脂圧Ｐ１及びＰ２を検出する。この検出
圧力Ｐｌ及びＰ２は、ゲート開度演算装置７に送られる
。ゲート開度演算装置７では、減算器７１が検出圧力Ｐ
１及びＰ２の差圧力、即ち、圧力分布１ΔＰｌ＝ｌＰｔ
−Ｐ２１を計算する。さらに、圧力分布１ΔＰ１と許
容値ΔＰ１１との差ＩΔＰ−ΔＰ” Ｉを減算器７２
で計算し、これから、ゲート開度指令値ｏｒを増幅器７
３でに倍することにより、次式で求める。When injection molding starts, resin pressure sensors 5 and 6 installed in the mold 2 detect resin pressures P1 and P2. The detected pressures Pl and P2 are sent to the gate opening calculation device 7. In the gate opening calculation device 7, the subtracter 71 calculates the detected pressure P
1 and P2, that is, pressure distribution 1ΔPl=lPt
- Calculate P21. Furthermore, the difference IΔP−ΔP''I between the pressure distribution 1ΔP1 and the allowable value ΔP11 is calculated by the subtractor 72.
From this, the gate opening command value or is calculated by the amplifier 7.
By multiplying by 3, it is calculated using the following formula.
θ「−に１ΔＰ−ΔＰ” ＋ （１）ゲート
開度指令値θｒから後述するモータ角変位θを減算器７
４で減算し、この減算結果（θ「−θ）を増幅アンプ７
５で増幅することにより、ゲート開度操作量ｌをゲート
開度駆動装置９へ送る。θ "-1ΔP-ΔP" + (1) Subtractor 7 the motor angular displacement θ, which will be described later, from the gate opening command value θr.
4, and the subtraction result (θ"-θ) is amplified by the amplifier 7.
5, the gate opening manipulated variable l is sent to the gate opening driving device 9.
ゲート開度駆動装置９では、モータ９１がゲート開度操
作量ｉに従って回転して、ゲート９ａの開度を調整する
。このモータ９１に取付けられたエンコーダ９２が上記
モータ角変位θをゲート開度演算装置７へ送出する。In the gate opening driving device 9, the motor 91 rotates according to the gate opening manipulation amount i to adjust the opening of the gate 9a. An encoder 92 attached to this motor 91 sends the motor angular displacement θ to the gate opening calculation device 7.
尚、ゲート９の開度（通過断面積）Ａは、角変位θの既
知関数、即ち、Ａ−ｆ（θ）で求められるので、この関
数ｆから上記（１）式の定数Ｋが求められる。このよう
に、ゲート開度指令値θｒとモータ角変位θとの差をと
り、フィードバック制御することによって、ゲート９ａ
の開度（通過断面積）Ａが自動制御される。Note that the opening degree (passage cross-sectional area) A of the gate 9 is determined by a known function of the angular displacement θ, that is, A−f(θ), so the constant K in the above equation (1) can be determined from this function f. . In this way, by taking the difference between the gate opening command value θr and the motor angular displacement θ and performing feedback control, the gate 9a
The opening degree (cross-sectional area of passage) A is automatically controlled.
このような構成の全型内樹脂圧制御装置によって、許容
値ΔＰＩ′と圧力分布ＩΔＰ１との差が大きいときは、
ゲート９ａの開度Ａが大きくなり、その差が小さくなる
にしたがって、ゲート９ａの開度Ａを基準値Ａ０に近づ
けることが可能になる。When the difference between the allowable value ΔPI' and the pressure distribution IΔP1 is large using the entire in-mold resin pressure control device with such a configuration,
As the opening degree A of the gate 9a increases and the difference therebetween decreases, it becomes possible to bring the opening degree A of the gate 9a closer to the reference value A0.
ここで、ΔＰ８−１ΔＰ！−〇のときは、Ａ−ＡＯとな
る。Here, ΔP8-1ΔP! - When it is 〇, it becomes A-AO.
尚、この全型内樹脂圧制御装置は、射出工程と保圧工程
の期間作用し、冷却工程に入ると、樹脂の逆流を防ぐた
めに、ゲート開度Ａを零とするように、モータ９１を操
作する。This entire mold resin pressure control device operates during the injection process and the pressure holding process, and when the cooling process begins, the motor 91 is activated so that the gate opening degree A is zero in order to prevent resin from flowing backward. Manipulate.
尚、初期の射出開始時点のゲート開度Ａを、その最大値
Ａ０．と基準値Ａ。との間の値ＡＩ。Note that the gate opening degree A at the initial injection start point is set to its maximum value A0. and standard value A. The value AI between.
（Ａ□、＞Ａ＋、＞Ａｏ）にしておき、 Ａ Ｉｍ”
”Ａ ａ ａ ｘ −Ａ ６というようにゲート開度Ａ
を制御するようにしても良い。Set it to (A□, >A+, >Ao), and A Im”
``A a a x - A 6'' The gate opening degree A
It may be possible to control the
以上の説明から明らかなように、本発明によれば、射出
工程と保圧工程の期間、全型内樹脂圧力を複数の位置で
検出し、これらの圧力分布からゲート開度を調整してい
るので、射出工程と保圧工程の期間中に生じる全型内樹
脂圧力の分布を小さくすることができ、成形品の残留応
力を減少することができる。これにより、光学特性や寸
法精度の良好な高品質の成形品を得ることができる。As is clear from the above explanation, according to the present invention, the entire resin pressure within the mold is detected at multiple positions during the injection process and the pressure holding process, and the gate opening degree is adjusted based on the pressure distribution. Therefore, the distribution of the total resin pressure within the mold that occurs during the injection process and the pressure holding process can be reduced, and the residual stress in the molded product can be reduced. Thereby, a high quality molded product with good optical properties and dimensional accuracy can be obtained.
第１図は本発明の一実施例による射出成形機の全型内樹
脂圧制御装置の構成を示す断面・プロッり図、第２図は
第１図中のゲート開度駆動装置とゲート開度演算装置の
具体的な構成を示すブロック図である。
５．６・・・樹脂圧センサ、７・・・ゲート開度演算装
置、９・・・ゲート開度駆動装置。Fig. 1 is a cross-sectional/plot diagram showing the configuration of the entire in-mold resin pressure control device of an injection molding machine according to an embodiment of the present invention, and Fig. 2 shows the gate opening drive device and gate opening in Fig. 1. FIG. 2 is a block diagram showing a specific configuration of an arithmetic device. 5.6... Resin pressure sensor, 7... Gate opening calculation device, 9... Gate opening driving device.
Claims (1)
出し、該射出された溶融樹脂を保圧する工程を制御する
制御装置において、前記ゲート中を通過する前記樹脂の
通過断面積を可変調節する調節機構と、前記金型内の樹
脂の圧力を複数の位置で検出し、複数の検出圧力を出力
する検出手段と、前記複数の検出圧力分布が所定の許容
値以内となるように、前記調節機構を制御する制御手段
とを有することを特徴とする射出成形機の金型内樹脂圧
制御装置。1. In a control device that controls the process of injecting molten resin into a mold of an injection molding machine through a gate and holding pressure of the injected molten resin, the cross-sectional area of the resin passing through the gate is an adjustment mechanism that variably adjusts; a detection means that detects the pressure of the resin in the mold at a plurality of positions and outputs a plurality of detected pressures; An in-mold resin pressure control device for an injection molding machine, comprising: a control means for controlling the adjustment mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28302889A JPH03146323A (en) | 1989-11-01 | 1989-11-01 | In-mold resin pressure controller for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28302889A JPH03146323A (en) | 1989-11-01 | 1989-11-01 | In-mold resin pressure controller for injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03146323A true JPH03146323A (en) | 1991-06-21 |
Family
ID=17660286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28302889A Pending JPH03146323A (en) | 1989-11-01 | 1989-11-01 | In-mold resin pressure controller for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03146323A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0776034A (en) * | 1993-09-08 | 1995-03-20 | Nissei Plastics Ind Co | Method and device for detecting pressure of injection molding machine |
| EP0783947A3 (en) * | 1996-01-10 | 1998-09-30 | SORENSEN, Jens Ole | Balanced multi-cavity injection molding of ridged-wall plastic products |
| JP4716455B1 (en) * | 2010-12-19 | 2011-07-06 | 龍守 佐藤 | Electronic trigger instrument mounting device |
| JP2020049703A (en) * | 2018-09-25 | 2020-04-02 | 東芝機械株式会社 | Injection molding machine, injection molding system and injection control method |
-
1989
- 1989-11-01 JP JP28302889A patent/JPH03146323A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0776034A (en) * | 1993-09-08 | 1995-03-20 | Nissei Plastics Ind Co | Method and device for detecting pressure of injection molding machine |
| EP0783947A3 (en) * | 1996-01-10 | 1998-09-30 | SORENSEN, Jens Ole | Balanced multi-cavity injection molding of ridged-wall plastic products |
| US5879613A (en) * | 1996-01-10 | 1999-03-09 | Universal Ventures | Balanced multi-cavity injection molding of like plastic products |
| JP4716455B1 (en) * | 2010-12-19 | 2011-07-06 | 龍守 佐藤 | Electronic trigger instrument mounting device |
| JP2012132954A (en) * | 2010-12-19 | 2012-07-12 | Ryuma Sato | Sensor trigger attachment device of electronic traditional japanese musical instrument |
| JP2020049703A (en) * | 2018-09-25 | 2020-04-02 | 東芝機械株式会社 | Injection molding machine, injection molding system and injection control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4559991A (en) | Method and system of controlling injection molding machines | |
| US20230031650A1 (en) | Systems and Approaches for Controlling an Injection Molding Machine | |
| US20010020753A1 (en) | Method and apparatus for controlling injection molding machine capable of reducing variations in weight of molded products | |
| JPH03146323A (en) | In-mold resin pressure controller for injection molding machine | |
| JP2628266B2 (en) | Speed control method and apparatus for injection molding machine | |
| JP2883140B2 (en) | Injection molding machine filling detection method | |
| JPS6332607B2 (en) | ||
| JPH0622832B2 (en) | Injection compression molding method and apparatus | |
| JPS636341B2 (en) | ||
| US5543093A (en) | Injection molding method and apparatus | |
| JPH0628254Y2 (en) | Injection molding equipment | |
| JPH09220745A (en) | Injection compression molding machine | |
| JPH08174609A (en) | Method for controlling speed of injection molding machine | |
| JP3265923B2 (en) | Injection compression molding method and apparatus | |
| JP3232550B2 (en) | Control method of mold clamping pressure in injection compression molding | |
| JP2787470B2 (en) | Control method of injection molding machine | |
| JPH0243559Y2 (en) | ||
| JPH0423895B2 (en) | ||
| JPH0834738B2 (en) | Injection compression molding method | |
| JP2691043B2 (en) | Method and apparatus for controlling internal pressure of injection molding machine | |
| JP2868139B2 (en) | Injection control method and apparatus for injection molding machine | |
| JPH01208114A (en) | Resin temperature control device of injection molding machine | |
| JPH0336014A (en) | Device for controlling changing-over between filling and dwelling of injection molder | |
| JPH0994859A (en) | Method for controlling clamping pressure in injection compression molding | |
| JPH02153717A (en) | Injection compression molding equipment and molding method thereof |