JPH04201225A - Method of controlling stroke of screw in injection molding machine - Google Patents
Method of controlling stroke of screw in injection molding machineInfo
- Publication number
- JPH04201225A JPH04201225A JP33277890A JP33277890A JPH04201225A JP H04201225 A JPH04201225 A JP H04201225A JP 33277890 A JP33277890 A JP 33277890A JP 33277890 A JP33277890 A JP 33277890A JP H04201225 A JPH04201225 A JP H04201225A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- resin
- stroke
- injection
- origin
- 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
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001746 injection moulding Methods 0.000 title claims description 15
- 239000011347 resin Substances 0.000 claims abstract description 62
- 229920005989 resin Polymers 0.000 claims abstract description 62
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 230000002265 prevention Effects 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 2
- 230000003449 preventive effect Effects 0.000 abstract 2
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005429 filling process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000630 rising effect Effects 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C45/76—Measuring, controlling or regulating
-
- 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
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/52—Non-return devices
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
］産業上の利用分野〕
本発明は、インラインスクリュタイプの射出成形機にお
けるスクリュの射出ストローク制御方法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for controlling the injection stroke of a screw in an in-line screw type injection molding machine.
射出成形機として、第１図と第２図に示すように、射出
ノズル１とホッパ２を備えた加熱筒３内に、回転装置４
によって周方向に回転させられ、また移動装置５により
軸方向に移動させられるスクリュ６を挿入するとともに
、該スクリュ６の先端部に、樹脂の逆流防止機構７を設
け、またスクリー６に該スクリュ６の位置を検出するエ
ンコータ等の位置検出機構８を付設したものが知られて
いる。なお、逆流防止機構７は、スクリュ６に設けられ
た溝６ａに可動リング（パンタフローリング）９を遊嵌
し、スクリュ６か第２図（ハ）のように射出ノズル１に
向って前進するときは可動リング９が溝６ａの後壁６ｂ
に当接して樹脂のホッパ２側への戻りを阻止し、またス
クリュ６が第２図（イ）のようにホッパ側に後退する際
は、溝６ａの前壁６ｃに形成された隙間６ｄからの樹脂
の射出ノズル１側への流通を自由にする。位置検出機構
８にはエンコーダの他にポテンショメータやストローク
センサ゛、リミノトスイ、チ、近接スイッチ等も用いら
れる。また、逆流防止機構７は図のものの他にボールチ
エツク式のものなといろいろある。As an injection molding machine, as shown in FIGS. 1 and 2, a rotating device 4 is installed in a heating cylinder 3 equipped with an injection nozzle 1 and a hopper 2.
A screw 6 is inserted which is rotated in the circumferential direction by a screw 6 and moved in an axial direction by a moving device 5, and a resin backflow prevention mechanism 7 is provided at the tip of the screw 6. A device equipped with a position detection mechanism 8 such as an encoder for detecting the position of is known. The backflow prevention mechanism 7 is constructed by loosely fitting a movable ring (Panto ring) 9 into a groove 6a provided in the screw 6, and when the screw 6 moves forward toward the injection nozzle 1 as shown in FIG. 2(c). The movable ring 9 is located on the rear wall 6b of the groove 6a.
When the screw 6 is moved back toward the hopper as shown in FIG. This allows the resin to freely flow to the injection nozzle 1 side. In addition to the encoder, the position detection mechanism 8 also includes a potentiometer, a stroke sensor, a rim switch, a proximity switch, and the like. In addition, there are various types of backflow prevention mechanism 7, such as a ball check type mechanism other than the one shown in the figure.
上記の射出成形機は、スクリュ６の回転で樹脂を溶融さ
せて加熱筒３の前部に上記逆流防止機構７を通過させて
送りなからその樹脂圧でスクリュ６をホッパ２側に後退
させ、位置検出機構８により検出されるスクリュ６の後
退ストロークにより樹脂の必要な射出量を計量した後、
スクリュ６を前進させて上記で計量した樹脂を金型１０
内に射出する。The injection molding machine described above melts the resin with the rotation of the screw 6, passes it through the backflow prevention mechanism 7 to the front of the heating cylinder 3, and then uses the resin pressure to retreat the screw 6 toward the hopper 2. After measuring the required injection amount of resin by the backward stroke of the screw 6 detected by the position detection mechanism 8,
Move the screw 6 forward and pour the resin measured above into the mold 10.
Eject inside.
そして、第４図のように、上記射出工程における充填工
程中の何段かの速度切換位置Ｓ１〜Ｓ４と、保圧切換位
置Ｓ、の基準点を、樹脂の射出量を計量し終ったスクリ
ュ６の後退位置を射出ストローク原点に設定し、スクリ
ュ６のストローク制御を上記の原点を基準にして行って
いる。Then, as shown in FIG. 4, the reference points of the several speed switching positions S1 to S4 during the filling process in the injection process and the holding pressure switching position S are set to the screws that have finished measuring the amount of resin to be injected. The retracted position of the screw 6 is set as the origin of the injection stroke, and the stroke of the screw 6 is controlled based on the origin.
〔発明が解決しようとする課題；
上記の射出成形機においては、第２図（イ）のようにス
クリュ６か後退して所定量の樹脂を計量し終ってから、
同図（ハ）のようにスクリュ６か前進しテ樹脂を射出ノ
ズルｌから金型１０内に射出をはじめるまでの間に、同
図（ロ）のように計量樹脂がホッパ２側に僅かではある
か逆流する。[Problem to be solved by the invention; In the above injection molding machine, after the screw 6 is retracted and a predetermined amount of resin has been measured, as shown in FIG.
As shown in the figure (c), before the screw 6 moves forward and the resin starts to be injected from the injection nozzle l into the mold 10, as shown in the figure (b), the metered resin is slightly deposited on the hopper 2 side. There is or it flows backwards.
計量完了時にスクリュ先端部に計量された樹脂量をＪ’
、スクリュ６の前進開始から逆流防止機構７の閉鎖時ま
でに逆流する樹脂量をＪ７、逆流防止機構７の閉鎖時点
におけるスクリュ先端部の樹脂量をＪ、とすると、次の
（１）式が成立し、樹脂量Ｊ３はＪｌより逆流樹脂量Ｊ
２分少だけなくなる。When the measurement is completed, the amount of resin measured at the screw tip is J'
, the amount of resin that flows backward from the start of forward movement of the screw 6 to the time when the backflow prevention mechanism 7 closes is J7, and the amount of resin at the tip of the screw at the time of closing the backflow prevention mechanism 7 is J, then the following equation (1) is obtained. Established, the resin amount J3 is the backflow resin amount J from Jl.
It only takes 2 minutes less.
Ｊ、＝Ｊ、−Ｊ、 ・ ・・ （１）上記で逆流樹
脂量Ｊ、が常に一定であれば、樹１・・１
措置Ｊ３は一定となるが、逆流防止機構７の可動リング
９は、スクリュ６の軸方向に移動自在とされていて、逆
流防止機構７の閉鎖ストロークｇをその都度変化させる
ため、逆流樹脂量Ｊ、か射出側に計量した後、スクリュ
を前進させて計量樹脂を射出ノズルから金型内に射出さ
せる射出成形機において、スクリュに設けられた逆流防
止機構の射出工程における閉鎖時点を加熱筒内の樹脂圧
力センサにより検出し、該閉鎖時点をスクリ＝の射出ス
トローク原点としてこれを基準にスクリュのストローク
制御を行う構成とした。J, = J, -J, ... (1) If the backflow resin amount J, is always constant in the above, tree 1...1 measure J3 will be constant, but the movable ring 9 of the backflow prevention mechanism 7 will be , is movable in the axial direction of the screw 6, and the closing stroke g of the backflow prevention mechanism 7 is changed each time. In an injection molding machine that injects from an injection nozzle into a mold, a resin pressure sensor in the heating cylinder detects the closing point in the injection process of the backflow prevention mechanism provided on the screw, and the closing point is set as the origin of the injection stroke of the screw. The screw stroke is controlled based on this reference.
加熱筒内を後退して樹脂を計量し終ったスクリュが前進
を開始すると、加熱筒内の計量樹脂の圧力が上昇する。When the screw, which has retreated inside the heating cylinder and finished measuring the resin, starts moving forward, the pressure of the measured resin inside the heating cylinder increases.
樹脂圧力センサは樹脂圧力の上昇から逆流防止機構の閉
鎖を検出する。The resin pressure sensor detects the closure of the backflow prevention mechanism from the increase in resin pressure.
本発明では、樹脂圧力センサによって検出された、逆流
防止機構の閉鎖時点をスクリュの射出ストローク原点と
し、これを基準にスクリュのストローク制御を行う。In the present invention, the closing point of the backflow prevention mechanism detected by the resin pressure sensor is set as the origin of the injection stroke of the screw, and the stroke of the screw is controlled based on this point.
したがって逆流防止機構の閉鎖位置が射出工程の都度変
わって逆流樹脂量が変化するようなことがあっても、そ
れに関係なくスクリュのストローク制御を正確に行うこ
とができる。Therefore, even if the closed position of the backflow prevention mechanism changes each time the injection process is performed and the amount of backflow resin changes, the stroke of the screw can be accurately controlled regardless of this.
工程ごとに変化する。It changes depending on the process.
このため、前記のように、樹脂を計量し終ったスクリュ
６の後退位置を射出ストロークの原点として設定し、ス
クリＳ６のストローク制御を上記の原点を基準にして行
うと、逆流防止機構７の閉鎖位置の変化に起因して、金
型１０内に射出される樹脂量か一定にならず、成形品の
寸法変動、重量変動、物性への影響等か生じ、精密成形
を安定して行う上で大きな障害となっていた。Therefore, as described above, if the retracted position of the screw 6 after measuring the resin is set as the origin of the injection stroke and the stroke control of the screw S6 is performed based on the above origin, the backflow prevention mechanism 7 is closed. Due to the change in position, the amount of resin injected into the mold 10 is not constant, which may cause dimensional variations, weight variations, and effects on the physical properties of the molded product, making it difficult to perform precision molding stably. This was a major obstacle.
本発明は、逆流防止機構の閉鎖位置の変化に関係無く、
金型内への射出樹脂量を一定にして精密成形を安定して
行うことかできる射出成形機におけるスクリュのストロ
ーク制御方法を提供することを目的とする。The present invention provides that, regardless of changes in the closed position of the backflow prevention mechanism,
An object of the present invention is to provide a method for controlling the stroke of a screw in an injection molding machine, which can stably perform precision molding by keeping the amount of resin injected into a mold constant.
上記の目的を達成するために、本発明は、射出ノズルと
ホ、バが設けられた加熱筒内に、先端部に樹脂の逆流防
止機構が設けられたスクリュを挿入し、スクリュの回転
で樹脂を溶融させながらスクリュをホ、 ハ側に後退さ
せて樹脂を射出ノズル〔実施例〕
本発明の適用対象となる射出成形機の基本構造は従来の
射出成形機と同一である。本発明においては、射出成形
機の加熱筒３に樹脂圧カセ・ンサ１１を取り付け、この
樹脂圧力センサ１１により逆流防止機構７の閉鎖位置を
検出する。樹脂圧力センサ１１は、通常、スクリー６の
計量ストローク位置（後退位置）における可動リング９
のホッパ２側に設けられる。In order to achieve the above object, the present invention inserts a screw with a resin backflow prevention mechanism at the tip into a heating cylinder provided with an injection nozzle, holes and bars, and uses the rotation of the screw to release resin. While melting the resin, the screw is moved back to the E and C sides to inject the resin into the nozzle [Example] The basic structure of the injection molding machine to which the present invention is applied is the same as that of the conventional injection molding machine. In the present invention, a resin pressure sensor 11 is attached to the heating cylinder 3 of the injection molding machine, and the resin pressure sensor 11 detects the closed position of the backflow prevention mechanism 7. The resin pressure sensor 11 normally detects the movable ring 9 at the metering stroke position (retracted position) of the scree 6.
is provided on the hopper 2 side.
後退して樹脂を計量したスクリュ６か前進を開始すると
（開始点は第３図のＡ参照）、樹脂圧力センサ１１の部
分の樹脂圧力か逆流防止機構７を逆流する樹脂によって
第３図のように徐々に高まり、その後再び降下する。実
験によると、樹脂圧力か上昇し終って下降に移る変曲点
（第３図のＢ）か逆流防止機構７の閉鎖に一致すること
か分かった。When the screw 6 moves backward and measures the resin and starts moving forward (refer to A in Figure 3 for the starting point), the resin pressure at the resin pressure sensor 11 or the resin flowing back through the backflow prevention mechanism 7 causes the screw 6 to move forward as shown in Figure 3. gradually increases and then falls again. According to experiments, it was found that the inflection point (B in FIG. 3) where the resin pressure finishes rising and then starts falling corresponds to the closing of the backflow prevention mechanism 7.
本発明は、樹脂圧力センサ１１て上記の変曲点を知るこ
とによって逆流防止機構７の閉鎖を検出する。圧力の変
曲点は次のようにして検出される。The present invention detects the closure of the backflow prevention mechanism 7 by knowing the above-mentioned inflection point using the resin pressure sensor 11. The pressure inflection point is detected as follows.
すなわち、圧力センサ１１て樹脂圧を検出し、Ａ／Ｄフ
ンバータ１２により制御装置１３にデジタル値として人
力する。変曲点において樹脂圧力は上昇から下降に移行
する。下降行程において現在の樹脂圧Ｐｐｖと前回のサ
ンプリングでの樹脂圧Ｐｐｖ′を比較すると、ｐｐｖ＜
Ｐｐｖ’ となるはずである。この時か変曲点（逆流防
止機構閉鎖）であり、この時の射出ストローク（アブソ
リュートエンフーダ８て検出）現在値をう、チし、原点
Ｓ。とする。計量完了設定値と上記で検出した原点Ｓ。That is, the pressure sensor 11 detects the resin pressure, and the A/D converter 12 manually inputs it to the control device 13 as a digital value. At the inflection point, the resin pressure shifts from increasing to decreasing. Comparing the current resin pressure Ppv and the resin pressure Ppv' at the previous sampling in the downward stroke, ppv<
It should be Ppv'. At this time, it is the inflection point (backflow prevention mechanism is closed), and the current value of the injection stroke (detected by the absolute enhancer 8) at this time is set to the origin S. shall be. The measurement completion setting value and the origin S detected above.
を比較し、この偏差分を各変速位置設定値およびＶ→Ｐ
切換位置設定値からひき、この演算結果で制御を行う。and calculate this deviation from each shift position set value and V→P.
This is subtracted from the switching position set value and control is performed using this calculation result.
場合によっては、計量完了設定値〈原点 の場合もあり
、この時は各設定値に偏差をたすことになる。In some cases, the measurement completion set value may be the origin, and in this case, the deviation will be added to each set value.
このように逆流防止機構７の閉鎖時点をスクリュ６の射
出ストローク原点Ｓ。とじ、この原点Ｓ。In this way, the closing point of the backflow prevention mechanism 7 is the injection stroke origin S of the screw 6. Binding, this origin S.
を基準に、例えば第４図の射出工程における充填工程中
の速度切換位置Ｓ１〜Ｓ４と、保圧切換位置Ｓ５を決定
し、スクリュ６のストローク制御を行う。Based on this, for example, the speed switching positions S1 to S4 and the pressure holding switching position S5 during the filling process in the injection process shown in FIG. 4 are determined, and the stroke of the screw 6 is controlled.
り発明の効果〕
以上説明したように、本発明に係る射出成形機における
スクリュのストローク制御方法は、射出ノズルとホッパ
か設けられた加熱筒内に、先端部に樹脂の逆流防止機構
か設けられたスクリュを挿入し、スクリュの回転で樹脂
を溶融させなからスクリュをホッパ側に後退させて樹脂
を射出ノズル側に計量した後、スクリュを前進させて計
量樹脂を射出ノズルから金型内に射出させる射出成形機
において、スクリュに設けられた逆流防止機構の射出工
程における閉鎖時点を加熱筒内の樹脂圧力センサにより
検出し、該閉鎖時点をスクリュの射出ストローク原点と
してこれを基準にスクリュのストローク制御を行う構成
とされているので、逆流防止機構の閉鎖位置か射出工程
のたびに変化して樹脂の逆流量か定まらなくても、それ
に影響されることなく金型内への射出樹脂量を一定にし
て、寸法や重量等の精度か高く、また物性の安定した製
品を得ることかできる。[Effects of the Invention] As explained above, the method for controlling the stroke of a screw in an injection molding machine according to the present invention includes a heating cylinder in which an injection nozzle and a hopper are provided, and a mechanism for preventing resin backflow at the tip thereof. Insert the screw, and without melting the resin with the rotation of the screw, move the screw back toward the hopper and measure the resin toward the injection nozzle, then move the screw forward and inject the measured resin from the injection nozzle into the mold. In an injection molding machine, the closing point in the injection process of the backflow prevention mechanism provided on the screw is detected by a resin pressure sensor in the heating cylinder, and the screw stroke is controlled based on this closing point as the screw injection stroke origin. Even if the closed position of the backflow prevention mechanism changes with each injection process and the amount of resin backflow is uncertain, the amount of resin injected into the mold can be maintained at a constant level without being affected by this. By doing so, it is possible to obtain products with high precision in dimensions, weight, etc., and with stable physical properties.
第１図は本発明か適用されるインラインスクリュタイプ
の射出成形機の一例を示す断面図、第２図（イ）、（ロ
）、（ハ）は逆流防止機構の動きを示す断面略図、第３
図はスクリュの射出ストローク開始直後における樹脂圧
力の変化図、第４図は射出工程におけるスクリュのスト
ローク制御の一例を示す図面である。
１ 射出ノズル ２・・・ホッパ３・加熱筒
６・・スクリュ７・逆流防止機構 １０・
金型
１１・樹脂圧力センサFig. 1 is a sectional view showing an example of an in-line screw type injection molding machine to which the present invention is applied; Figs. 3
The figure is a diagram showing changes in resin pressure immediately after the start of the injection stroke of the screw, and FIG. 4 is a drawing showing an example of stroke control of the screw in the injection process. 1 Injection nozzle 2... hopper 3/heating tube
6. Screw 7. Backflow prevention mechanism 10.
Mold 11/Resin pressure sensor
Claims (1)
樹脂の逆流防止機構が設けられたスクリュを挿入し、ス
クリュの回転で樹脂を溶融させながらスクリュをホッパ
側に後退させて樹脂を射出ノズル側に計量した後、スク
リュを前進させて計量樹脂を射出ノズルから金型内に射
出させる射出成形機において、スクリュに設けられた逆
流防止機構の射出工程における閉鎖時点を加熱筒内の樹
脂圧力センサにより検出し、該閉鎖時点をスクリュの射
出ストローク原点としてこれを基準にスクリュのストロ
ーク制御を行うことを特徴とする射出成形機におけるス
クリュのストローク制御方法。A screw with a resin backflow prevention mechanism at the tip is inserted into a heating cylinder equipped with an injection nozzle and a hopper, and while the screw rotates to melt the resin, the screw is retreated toward the hopper and the resin is injected. In an injection molding machine that injects the measured resin from the injection nozzle into the mold by moving the screw forward after metering to the nozzle side, the closing point in the injection process of the backflow prevention mechanism installed in the screw is determined by the resin pressure in the heating cylinder. A method for controlling the stroke of a screw in an injection molding machine, which comprises detecting the closing point with a sensor, and controlling the stroke of the screw based on the closing point as the origin of the injection stroke of the screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2332778A JPH066319B2 (en) | 1990-11-29 | 1990-11-29 | Stroke control method of screw in injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2332778A JPH066319B2 (en) | 1990-11-29 | 1990-11-29 | Stroke control method of screw in injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04201225A true JPH04201225A (en) | 1992-07-22 |
| JPH066319B2 JPH066319B2 (en) | 1994-01-26 |
Family
ID=18258724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2332778A Expired - Lifetime JPH066319B2 (en) | 1990-11-29 | 1990-11-29 | Stroke control method of screw in injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066319B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003106136A1 (en) * | 2002-06-14 | 2003-12-24 | Netstal-Maschinen Ag | Method for injection-molding weight-accurate parts and corresponding injection molding machine |
| US7074028B2 (en) | 2003-01-17 | 2006-07-11 | Fanuc Ltd | Injection molding machine having a freely rotatable screw |
| JP2008126533A (en) * | 2006-11-21 | 2008-06-05 | Nissei Plastics Ind Co | Control method of injection molding machine |
| JP2008132685A (en) * | 2006-11-29 | 2008-06-12 | Nissei Plastics Ind Co | Control method of injection molding machine |
| JP2008132686A (en) * | 2006-11-29 | 2008-06-12 | Nissei Plastics Ind Co | Screw angle setting method of injection molding machine |
| EP2000280A1 (en) | 2007-06-06 | 2008-12-10 | Fanuc Ltd | Injection molding machine and method for determining closure of check ring |
| EP2017060A1 (en) * | 2007-07-19 | 2009-01-21 | Fanuc Ltd | Injection molding machine which carries out controlling of closing operation of a check ring |
| US7556753B2 (en) | 2007-02-15 | 2009-07-07 | Fanuc Ltd | Method of indicating an open/close state of a check valve of an injection molding machine |
| US7654809B2 (en) | 2006-12-20 | 2010-02-02 | Fanuc Ltd | Injection molding machine having a force peak time detecting device |
| US7871257B2 (en) | 2007-02-15 | 2011-01-18 | Fanuc Ltd | Injection molding machine |
| CN104535309A (en) * | 2014-12-17 | 2015-04-22 | 海天塑机集团有限公司 | Test method for response time of injection molding screw non-return ring |
| KR20170026106A (en) * | 2015-08-31 | 2017-03-08 | 스미도모쥬기가이고교 가부시키가이샤 | Injection molding machine |
| JP2018122509A (en) * | 2017-01-31 | 2018-08-09 | 住友重機械工業株式会社 | Injection molding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6076321A (en) * | 1983-10-04 | 1985-04-30 | Toshiba Mach Co Ltd | Injection molding process |
| JPH0453720A (en) * | 1990-06-22 | 1992-02-21 | Japan Steel Works Ltd:The | Method and apparatus for calculating back-flow stroke in injection device of injection molder |
-
1990
- 1990-11-29 JP JP2332778A patent/JPH066319B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6076321A (en) * | 1983-10-04 | 1985-04-30 | Toshiba Mach Co Ltd | Injection molding process |
| JPH0453720A (en) * | 1990-06-22 | 1992-02-21 | Japan Steel Works Ltd:The | Method and apparatus for calculating back-flow stroke in injection device of injection molder |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003106136A1 (en) * | 2002-06-14 | 2003-12-24 | Netstal-Maschinen Ag | Method for injection-molding weight-accurate parts and corresponding injection molding machine |
| US7074028B2 (en) | 2003-01-17 | 2006-07-11 | Fanuc Ltd | Injection molding machine having a freely rotatable screw |
| JP2008126533A (en) * | 2006-11-21 | 2008-06-05 | Nissei Plastics Ind Co | Control method of injection molding machine |
| JP2008132685A (en) * | 2006-11-29 | 2008-06-12 | Nissei Plastics Ind Co | Control method of injection molding machine |
| JP2008132686A (en) * | 2006-11-29 | 2008-06-12 | Nissei Plastics Ind Co | Screw angle setting method of injection molding machine |
| JP4658908B2 (en) * | 2006-11-29 | 2011-03-23 | 日精樹脂工業株式会社 | Control method of injection molding machine |
| US7654809B2 (en) | 2006-12-20 | 2010-02-02 | Fanuc Ltd | Injection molding machine having a force peak time detecting device |
| US7556753B2 (en) | 2007-02-15 | 2009-07-07 | Fanuc Ltd | Method of indicating an open/close state of a check valve of an injection molding machine |
| US7871257B2 (en) | 2007-02-15 | 2011-01-18 | Fanuc Ltd | Injection molding machine |
| EP2000280A1 (en) | 2007-06-06 | 2008-12-10 | Fanuc Ltd | Injection molding machine and method for determining closure of check ring |
| US7980844B2 (en) | 2007-06-06 | 2011-07-19 | Fanuc Ltd | Injection molding machine and method for determining closure of check ring |
| EP2017060A1 (en) * | 2007-07-19 | 2009-01-21 | Fanuc Ltd | Injection molding machine which carries out controlling of closing operation of a check ring |
| US7654810B2 (en) | 2007-07-19 | 2010-02-02 | Fanuc Ltd. | Injection molding machine which carries out controlling of closing operation of a check ring |
| CN104535309A (en) * | 2014-12-17 | 2015-04-22 | 海天塑机集团有限公司 | Test method for response time of injection molding screw non-return ring |
| KR20170026106A (en) * | 2015-08-31 | 2017-03-08 | 스미도모쥬기가이고교 가부시키가이샤 | Injection molding machine |
| JP2017047577A (en) * | 2015-08-31 | 2017-03-09 | 住友重機械工業株式会社 | Injection molding machine |
| JP2018122509A (en) * | 2017-01-31 | 2018-08-09 | 住友重機械工業株式会社 | Injection molding machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH066319B2 (en) | 1994-01-26 |
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