JP2554291B2 - Injection speed measuring method of injection molding machine - Google Patents
Injection speed measuring method of injection molding machineInfo
- Publication number
- JP2554291B2 JP2554291B2 JP12575191A JP12575191A JP2554291B2 JP 2554291 B2 JP2554291 B2 JP 2554291B2 JP 12575191 A JP12575191 A JP 12575191A JP 12575191 A JP12575191 A JP 12575191A JP 2554291 B2 JP2554291 B2 JP 2554291B2
- Authority
- JP
- Japan
- Prior art keywords
- injection
- speed
- section
- sampling data
- value
- 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 - Lifetime
Links
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ダイカストマシンや射
出成形機等の射出成形装置の射出速度、特に溶湯や溶融
樹脂をキャビティに充填する際の高速射出速度を測定す
る方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring an injection speed of an injection molding apparatus such as a die casting machine or an injection molding machine, particularly a high injection speed when filling a cavity with molten metal or molten resin.
【０００２】[0002]
【従来の技術】今日、高品質の射出成形品を製造する為
に、ダイカストマシンではキャビティに溶湯を充填する
際の射出速度をフィ−ドバック制御により制御すること
が行われている。このフィ−ドバック制御に際しては、
先ずプランジャチップ又は射出シリンダの前進速度を検
出して射出速度を検出し、この検出した射出速度に基い
て次回の射出に際しての圧油を射出シリンダに送る流量
調整弁の開度変化や該射出の為の油圧を調整する圧力弁
の設定を修正することとしている。2. Description of the Related Art Today, in order to manufacture a high quality injection-molded article, in a die casting machine, an injection speed at the time of filling a molten metal into a cavity is controlled by feedback control. In this feedback control,
First, the forward speed of the plunger tip or the injection cylinder is detected to detect the injection speed, and based on this detected injection speed, the opening change of the flow rate adjustment valve that sends pressure oil to the injection cylinder and the injection The setting of the pressure valve that adjusts the oil pressure for this purpose will be modified.
【０００３】そして前記射出速度の検出方法としては、
高速射出区間内の１点を計測位置として定め、この１点
又は該１点を含む短区間範囲を通過する瞬間的速度を計
測し、この計測値を高速射出速度として次回射出に際し
ての修正の基礎とする方法や、射出コントロ−ラ等の外
部装置から計測タイミング信号を出力させ、このタイミ
ング信号が出力された時点での速度を検出して高速射出
速度として次回射出速度の基礎とする方法、又は、予め
設定した高速射出区間における特定区間の平均値を算出
して高速射出速度とするこのにより次回射出の基礎とす
る方法、更に、高速射出区間の最大値をピ−ク速度とし
て計測するこのにより次回射出の基礎とする方法等が用
いられ、この測定検出値に基いて射出速度のフィ−ドバ
ック制御を行う様にしている。As a method of detecting the injection speed,
One point in the high-speed injection section is set as the measurement position, the instantaneous speed of passing through this one point or a short section range including the one point is measured, and the measured value is set as the high-speed injection speed, which is the basis of correction for the next injection. And a method of outputting a measurement timing signal from an external device such as an injection controller, and detecting the speed at the time when this timing signal is output and basing the next injection speed as a high-speed injection speed, or By calculating the average value of the specific section in the preset high-speed injection section and using it as the high-speed injection speed, the method that is the basis of the next injection, and by measuring the maximum value of the high-speed injection section as the peak speed A method based on the next injection is used, and the feedback control of the injection speed is performed based on the measured and detected value.
【０００４】又、溶融樹脂を射出成形する射出成形装置
においても、射出成形を行うに際して射出成形機の高速
射出速度を同様に検出し、以てフィ−ドバック制御を行
う様にすることが多い。Also, in an injection molding apparatus for injection molding a molten resin, the high speed injection speed of the injection molding machine is similarly detected when performing the injection molding, and thus the feedback control is often performed.
【０００５】[0005]
【発明が解決しようとする課題】上記計測点として１点
を定める方法や、外部装置からタイミング信号を出力さ
せて射出速度を測定する方法は、高速射出区間の極めて
１部のみの射出速度をもって次回の高速射出区間の全区
間の制御を行うこととなる故、正確な修正制御を行うこ
とができない欠点が有った。The method of determining one point as the above-mentioned measuring point and the method of measuring the injection speed by outputting a timing signal from an external device have the injection speed of only a part of the high-speed injection section next time. Since the entire high-speed injection section is controlled, there is a drawback that accurate correction control cannot be performed.
【０００６】又、高速射出区間における特定区間の平均
値を算出する方法は、特定区間の設定によっては射出速
度変更時のオ−バシュ−トの影響を受け、又、かじり等
の影響を受けることにより不要な修正を行ってしまうこ
とが有り、この様に不要な修正を行わない様に計測区間
である特定区間を定めるには熟練と共に多くの手数を要
する欠点が有る。Further, the method of calculating the average value of the specific section in the high-speed injection section is affected by the overshoot at the time of changing the injection speed depending on the setting of the specific section, and is also affected by the galling or the like. Therefore, there is a drawback that it requires a lot of skill and skill to determine a specific section which is a measurement section so as not to perform unnecessary correction.
【０００７】更に、ピ−ク値を検出する方法は、製品や
装置等に重大な欠陥を生じさせない等の悪影響を排除す
ることには適しているも、製品の精度を高めるためには
適切とはいえないものであった。従って、従来の速度検
出方法では、高品質の製品を製造するには不充分であ
り、高品質の製品を安定して連続射出を行う為の適切な
フィ−ドバック制御を実施することが困難な欠点が有っ
た。Further, the method of detecting the peak value is suitable for eliminating adverse effects such as not causing serious defects in products and devices, but it is suitable for increasing the accuracy of products. It was something I couldn't say. Therefore, the conventional speed detection method is insufficient to manufacture a high quality product, and it is difficult to perform appropriate feedback control for stably performing continuous injection of a high quality product. There was a flaw.
【０００８】[0008]
【課題を解決するための手段】本発明は、射出速度を所
定の速度幅をもって複数の区画に区分し、高速射出区間
における射出速度を一定間隔で多数計測し、最も多数個
の計測値が含まれる速度区間に属する計測値の平均を算
出することとする。According to the present invention, an injection speed is divided into a plurality of sections with a predetermined speed width, a large number of injection speeds in a high-speed injection section are measured at regular intervals, and the most measured value is included. The average of the measured values belonging to the speed section is calculated.
【０００９】[0009]
【作 用】本発明は、射出速度を所定の速度幅に分割
し、計測点が最も多く含まれる区画に属する範囲の速度
を平均値算出の基礎とする故、射出速度が比較的安定し
た速度範囲から速度平均を求めることができ、オ−バシ
ュ−トやかじり等による外乱の影響を小さくすることが
できる。[Operation] In the present invention, the injection speed is divided into predetermined speed ranges, and the speed of the range belonging to the section containing the most measurement points is used as the basis for calculating the average value. Therefore, the injection speed is relatively stable. The velocity average can be obtained from the range, and the influence of disturbance due to overshoot or galling can be reduced.
【００１０】[0010]
【実施例】本発明の実施例は、図２に示す様に、固定金
型１１と可動金型１３との間に形成されたキャビティ１
５に射出スリ−ブ２３から溶湯２９を射出するダイカス
トマシンにおいて、射出シリンダ２１によりプランジャ
チップ２５を前進させる際の移動速度をマグネットスケ
−ル２７により検出するものであり、この検出された射
出速度は、例えば図３に示す様に、キャビティ１５の容
積に応じて所定量の溶湯２９を注入した射出スリ−ブ２
３内の空気を先ず排出する様にプランジャチップ２５を
低速で前進させ、この低速射出速度により射出スリ−ブ
２３内に注入した溶湯２９で射出スリ−ブ２３内を満た
し、射出スリ−ブ２３内を溶湯２９で満たすことにより
射出スリ−ブ２３内の空気を排出した後、所定位置Ｐh
からプランジャチップ２５の前進速度を早めて射出速度
を高速とし、溶湯２９がキャビティ１５に略充満される
位置Ｐdからは射出速度を減速する減速区間とし、以て
キャビティ１５に溶湯２９が充満されたときに金型等に
過大な衝撃が生じない様にした高速射出速度が設定され
るものである。EXAMPLE As shown in FIG. 2, an example of the present invention is a cavity 1 formed between a fixed mold 11 and a movable mold 13.
In the die casting machine for injecting the molten metal 29 from the injection sleeve 23 in FIG. 5, the moving speed when the plunger tip 25 is advanced by the injection cylinder 21 is detected by the magnet scale 27. For example, as shown in FIG. 3, the injection sleeve 2 in which a predetermined amount of molten metal 29 is injected according to the volume of the cavity 15 is injected.
The plunger tip 25 is moved forward at a low speed so that the air in 3 is first discharged, and the inside of the injection sleeve 23 is filled with the molten metal 29 injected into the injection sleeve 23 at this low injection speed. After the air inside the injection sleeve 23 is discharged by filling the inside with the molten metal 29, a predetermined position Ph
Therefore, the forward speed of the plunger tip 25 is increased to increase the injection speed, and from the position Pd at which the molten metal 29 is substantially filled in the cavity 15 to a deceleration section in which the injection speed is reduced, the molten metal 29 is filled in the cavity 15. Sometimes, a high injection speed is set so as not to cause an excessive impact on the mold or the like.
【００１１】この射出速度の変化を検出するに際し、例
えば、少なくとも高速射出区間におけるストロ−クの１
mm毎において速度を検出すると共に、この検出した速度
の値を記憶させ、又、予め射出速度を0.1ｍ／秒毎の幅
Ｖd等として多数の区画に分割して第１速度領域とした
第１区画Ｖ1から第ｎ速度領域とした第ｎ区画Ｖnを設定
しておき、前記記憶した各速度を各速度領域の区画に振
り分け、第１区画Ｖ1から第ｎ区画Ｖnに属した記憶速度
の個数が最も多い区画を特定区画Ｖkとし、この特定区
画Ｖkの領域に属する記憶速度のみを抽出して平均速度
を算出するものである。When detecting the change in the injection speed, for example, the stroke 1 at least in the high-speed injection section is detected.
In addition to detecting the velocity in mm, the detected velocity value is stored, and the injection velocity is divided into a number of sections in advance with a width Vd of 0.1 m / sec for the first velocity region. The n-th partition Vn is set as the n-th speed region from the partition V1 and each of the stored speeds is distributed to the partition of each speed region, and the number of storage speeds belonging to the first partition V1 to the n-th partition Vn is set. The largest partition is set as the specific partition Vk, and only the storage speed belonging to the area of this specific partition Vk is extracted to calculate the average speed.
【００１２】この平均速度を算出するに際しての具体的
手法は、図１及び図３に示す様に、射出開始からの射出
特性曲線を先ず演算により求めるものであり、この射出
特性曲線の算出は、前記マグネットスケ−ル２７により
射出シリンダ２１によって駆動前進させられるプランジ
ャチップ２５の移動速度を検出し、図３に示した様に縦
軸を射出速度とし、横軸を時間軸又はプランジャチップ
２５の移動位置を目盛ることとしたグラフを先ず検出値
により作成するものである。A concrete method for calculating the average velocity is to first obtain an injection characteristic curve from the start of injection by calculation as shown in FIGS. 1 and 3, and the calculation of the injection characteristic curve is as follows. The moving speed of the plunger tip 25 driven and advanced by the injection cylinder 21 by the magnet scale 27 is detected, and the vertical axis indicates the injection speed and the horizontal axis indicates the time axis or the movement of the plunger tip 25 as shown in FIG. First, a graph in which the positions are graduated is created based on the detected values.
【００１３】そして本実施例では、高速切換位置Ｐhと
充填完了位置Ｐeとの間である高速射出区間の内、高速
切換位置Ｐhから減速指令位置Ｐd迄の範囲を計測対象範
囲とし、この計測対象範囲内での最高速度Ｖmaxを検出
し、該最高速度Ｖmaxと制御システムの固有値である高
速射出下限値Ｖminの間隔を所定の速度幅を持った多数
の領域に分割する様にして所要個数の等間隔の区画を形
成し、高速領域から順次第１区画Ｖ1，第２区画Ｖ2，…
……第ｎ区画Ｖnとしておく。In the present embodiment, the range from the high speed switching position Ph to the deceleration command position Pd in the high speed injection section between the high speed switching position Ph and the filling completion position Pe is set as the measurement target range. The maximum speed Vmax within the range is detected, and the interval between the maximum speed Vmax and the high-speed injection lower limit value Vmin, which is an inherent value of the control system, is divided into a large number of areas having a predetermined speed width, so that the required number of pieces is equalized. The divisions are formed at intervals, and the first division V1, the second division V2, ...
...... As the nth section Vn.
【００１４】更に、射出特性曲線を求める為に検出した
前記検出値をサンプリングデ−タとし、サンプリングデ
−タを各デ−タの値に応じて各区画の領域範囲に割当
て、以て各区画Ｖ1乃至Ｖnに属するサンプリングデ−タ
の個数ｉを求めることにより第１区画Ｖ1乃至第ｎ区画
Ｖnとした各区画の速度領域に含まれるサンプリングデ
−タの数を計数することとし、以てサンプリングデ−タ
の個数ｉが最大の区画Ｖkを求める。Further, the detected value detected for obtaining the injection characteristic curve is used as sampling data, and the sampling data is assigned to the area range of each section in accordance with the value of each data, whereby each section is divided. By determining the number i of sampling data belonging to V1 to Vn, the number of sampling data included in the velocity region of each of the first section V1 to the n-th section Vn is counted. A section Vk having the maximum number i of data is obtained.
【００１５】尚、サンプリングデ−タの個数ｉが同数に
して最大個数となる区画が複数有る場合は、最大個数を
有する区画の内、最も高速の速度領域を割り当てた区画
を選出して特定区画Ｖkとする。この様に、サンプリン
グデ−タの個数ｉが最大の区画Ｖkを求めた後、該特定
区画Ｖkの範囲以外の速度測定値を削除し、特定区画Ｖk
の領域内の速度測定値の平均を算出して平均射出速度を
求めることとする。When there are a plurality of partitions having the same number i of sampling data and the maximum number, the partition to which the fastest speed region is assigned is selected from the partitions having the maximum number and the specific partition is selected. Let Vk. In this way, after the section Vk having the maximum number i of sampling data is obtained, the speed measurement value outside the range of the specific section Vk is deleted to obtain the specific section Vk.
The average injection speed is calculated by calculating the average of the speed measurement values in the area.
【００１６】本実施例は、この様にサンプリングデ−タ
の個数ｉが最大となる所定の速度幅とした特定区画Ｖk
の領域内の速度をもって平均値を算出する故、比較的安
定した高速射出速度から平均値を求めることができ、オ
−バ−シュ−トやかじりによる変動等の外乱による影響
を少なくし、安定したフィ−ドバック制御を行うことが
可能となるものである。In this embodiment, the specific section Vk having a predetermined speed width that maximizes the number i of sampling data in this way.
Since the average value is calculated using the speed within the area of, the average value can be obtained from the relatively stable high-speed injection speed, and the influence of disturbance such as overshoot and fluctuation due to galling can be reduced and stable. The above feedback control can be performed.
【００１７】そして第１区画Ｖ1から第ｎ区画Ｖnを定め
るに際しては、前述の様に最高速度Ｖmaxと高速射出下
限値Ｖminとの間を所要個数であるｎ個の区画に分割し
て各区画の領域となる速度幅Ｖdを定める場合のみでな
く、各区画の領域を定める速度幅Ｖdを設定入力し、検
出した最高速度Ｖmaxを基準として最高速度Ｖmaxから高
速射出下限値Ｖmin迄の範囲内で設定した速度幅Ｖdをも
って順次第１区画Ｖ1から第ｎ区画Ｖn迄を設ける様にす
ることもある。When determining the first to n-th sections V1 to Vn, the section between the maximum speed Vmax and the high-speed injection lower limit value Vmin is divided into the required number of n sections as described above. Not only when defining the speed range Vd that is the area, but also by setting and inputting the speed range Vd that defines the area of each section, and setting within the range from the maximum speed Vmax to the high-speed injection lower limit value Vmin with the detected maximum speed Vmax as a reference. The first section V1 to the n-th section Vn may be sequentially provided with the speed range Vd.
【００１８】又、検出した最高速度Ｖmaxの値を基準に
各区画を設定する場合のみでなく、図４に示す様に、各
区画の速度領域を予め設定入力しておく様にし、この領
域を定めた第１区画Ｖ1乃至第ｎ区画Ｖnが定められてい
る射出速度座標軸に射出特性曲線を合わせることとする
場合もあり、更に、サンプリングデ−タの個数ｉが最大
の特定区画Ｖkにおける平均値を算出するに際し、各サ
ンプリングデ−タの値を平均して平均速度を求める場合
に限ることなく、該図４に示した様に、射出特性曲線の
算出に用いる検出値の３個毎等の如く所要個数毎の検出
値をサンプリングデ−タとしてサンプリングデ−タの個
数ｉが最大となる特定区画Ｖkを決定し、特定区画Ｖkの
領域内における速度平均値の算出に際してはサンプリン
グデ−タよりも細かい間隔で測定した検出値をもって平
均射出速度を求めることする場合もある。Further, not only when each section is set on the basis of the value of the detected maximum speed Vmax, the speed area of each section is preset and input as shown in FIG. 4, and this area is set. In some cases, the injection characteristic curve may be aligned with the injection speed coordinate axis in which the defined first section V1 to n-th section Vn are defined, and the average value in the specific section Vk in which the number i of sampling data is maximum. The value of each sampling data is not averaged to calculate the average velocity when calculating, but as shown in FIG. 4, every three detection values used for calculating the injection characteristic curve, etc. As described above, the detection value for each required number is used as sampling data to determine the specific section Vk in which the number i of sampling data is maximum, and when calculating the velocity average value in the area of the specific section Vk, the sampling data is used. Fine It may be that finding the average injection speed with a detected value measured at intervals.
【００１９】この様に、本実施例は計測値であるサンプ
リングデ−タが特定の領域に含まれる個数の最も多い比
較的速度が安定した部分の射出速度を平均速度の基礎と
するものである故、例えば高速切換位置Ｐhから射出完
了位置Ｐe迄の距離が短く、図５に示す様に、高速射出
速度における加速領域と減速領域とが近接する特性の射
出特性曲線においても、最高速度Ｖmaxを含む最高速度
近辺における所要区間等、製品の成形に最も影響を与え
る区間の速度を抜き出して平均化することができる方法
である。As described above, in this embodiment, the average speed is based on the injection speed of the portion in which the sampling data, which is the measured value, is included in a specific area and the number of which is the largest and which is relatively stable. Therefore, for example, even if the distance from the high speed switching position Ph to the injection completion position Pe is short, and as shown in FIG. This is a method that can extract and average the speed of the section that most affects the molding of the product, such as the required section near the maximum speed.
【００２０】従って、本実施例は安定した高速射出速度
を検出することができ、この安定した検出速度に基いて
フィ−ドバック制御を可能とすることができるものであ
り、又、種々の特性曲線を設定した射出成形における射
出速度に容易に対応させて速度を検出することができる
射出速度の測定方法である。Therefore, the present embodiment is capable of detecting a stable high-speed injection speed and enabling feedback control based on this stable detection speed, and various characteristic curves. Is a method of measuring the injection speed, which allows the speed to be detected by easily corresponding to the injection speed in the injection molding set.
【００２１】[0021]
【発明の効果】本発明は射出速度を一定間隔で多数個計
測し、計測点が最も多い速度領域に属する射出速度の平
均を求める計測方法である故、種々の射出速度特性を設
定した射出速度においても比較的安定した速度区間を制
御対象の基礎として検出測定することができ、安定した
フィ−ドバック制御を行うことができる射出速度の計測
方法である。Since the present invention is a measuring method for measuring a large number of injection speeds at regular intervals and obtaining the average of the injection speeds belonging to the speed region having the most measurement points, the injection speeds with various injection speed characteristics are set. In the above, it is a method of measuring an injection speed that can detect and measure a relatively stable velocity section as a basis of a controlled object and can perform stable feedback control.
【図１】本発明に係る実施例の手順を示すフロ−チャ−
ト図。FIG. 1 is a flow chart showing a procedure of an embodiment according to the present invention.
Figure.
【図２】本発明を実施するダイカストマシンの概略図。FIG. 2 is a schematic view of a die casting machine for carrying out the present invention.
【図３】本発明の実施例を示す射出速度の速度特性曲線
を示すグラフ。FIG. 3 is a graph showing a velocity characteristic curve of injection velocity showing an example of the present invention.
【図４】本発明の他の実施例となる他の計測例を示すグ
ラフ。FIG. 4 is a graph showing another measurement example according to another embodiment of the present invention.
【図５】本発明を適用した他の射出速度特性曲線を示す
グラフ。FIG. 5 is a graph showing another injection velocity characteristic curve to which the present invention is applied.
１１ 固定金型 １３ 可動金型 １５ キャビティ ２１ 射出シリン
ダ ２３ 射出スリ−ブ ２５ プランジャ
チップ ２７ マグネットスケ−ル ２９ 溶湯11 Fixed mold 13 Movable mold 15 Cavity 21 Injection cylinder 23 Injection sleeve 25 Plunger tip 27 Magnet scale 29 Molten metal
Claims (1)
画に分割するものとし、高速射出区間における射出速度
を一定間隔で多数計測することにより多数個の射出速度
をサンプリングデ−タとして求め、前記所定速度幅の区
画の内、最多数のサンプリングデ−タが属する区画を特
定区画とし、該特定区画の領域における射出速度の平均
値を求めることにより射出速度を算出することを特徴と
する射出成形装置の射出速度計測方法。1. An injection speed is divided into a plurality of sections having a predetermined speed width, and a large number of injection speeds in a high-speed injection section are measured at a constant interval to obtain a large number of injection speeds as sampling data. The injection speed is calculated by determining the section to which the largest number of sampling data belongs among the sections of the predetermined speed width as the specific section, and calculating the average value of the injection speeds in the area of the specific section. Injection speed measurement method for molding equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12575191A JP2554291B2 (en) | 1991-05-29 | 1991-05-29 | Injection speed measuring method of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12575191A JP2554291B2 (en) | 1991-05-29 | 1991-05-29 | Injection speed measuring method of injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04351257A JPH04351257A (en) | 1992-12-07 |
| JP2554291B2 true JP2554291B2 (en) | 1996-11-13 |
Family
ID=14917910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12575191A Expired - Lifetime JP2554291B2 (en) | 1991-05-29 | 1991-05-29 | Injection speed measuring method of injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2554291B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114834014B (en) * | 2022-04-20 | 2024-06-11 | 西安拽亘弗莱工业自动化科技有限公司 | Uniform speed melt adhesive method applied to two-stage injection molding |
-
1991
- 1991-05-29 JP JP12575191A patent/JP2554291B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04351257A (en) | 1992-12-07 |
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