JPH0374611B2 - - Google Patents
Info
- Publication number
- JPH0374611B2 JPH0374611B2 JP18890284A JP18890284A JPH0374611B2 JP H0374611 B2 JPH0374611 B2 JP H0374611B2 JP 18890284 A JP18890284 A JP 18890284A JP 18890284 A JP18890284 A JP 18890284A JP H0374611 B2 JPH0374611 B2 JP H0374611B2
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- ejector
- molded
- injection molding
- determining
- 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
Links
- 238000001746 injection moulding Methods 0.000 claims description 14
- 230000002950 deficient Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012544 monitoring process 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
- B29C45/76—Measuring, controlling or regulating
- B29C45/7626—Measuring, controlling or regulating the ejection or removal of moulded articles
-
- 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
- B29C45/7626—Measuring, controlling or regulating the ejection or removal of moulded articles
- B29C2045/764—Measuring, controlling or regulating the ejection or removal of moulded articles detecting or preventing overload of an ejector
-
- 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
- B29C45/7686—Measuring, controlling or regulating the ejected articles, e.g. weight control
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によつて成形された成形品
の良否を判別する成形品良否判別装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molded product quality determining device for determining the quality of molded products molded by an injection molding machine.
一般に、射出成形機では、溶融した樹脂を金型
内に射出して、金型内で成形（冷却・固化）した
後、エジエクタによつて、金型から離型すること
によつて、成形品を成形している。最近、射出成
形機の技術的進歩は目覚しく、高精度を要求され
る製品、例えば、コンパクトデイスク等をも射出
成形によつて成形可能となつている。このよう
に、高精度の製品を射出成形する場合、成形品の
良否を判別することが極めて重要になつてくる。
Generally, in an injection molding machine, molten resin is injected into a mold, molded (cooled and solidified) in the mold, and then released from the mold by an ejector to produce a molded product. is being molded. In recent years, technological advances in injection molding machines have been remarkable, and it has become possible to mold products that require high precision, such as compact disks, by injection molding. As described above, when injection molding a high-precision product, it is extremely important to determine whether the molded product is good or bad.
従来、計量時間、充填時間等を監視し、これら
のパラメータの変化から成形品の不良を判別して
いる。しかしながら、成形品の多様化、多品種
化、高精度化に伴ない、従来提案されているパラ
メータを監視するだけでは、充分な良否判別がで
きない場合が生じてきた。 Conventionally, measuring time, filling time, etc. are monitored, and defective molded products are determined from changes in these parameters. However, with the diversification, variety, and high precision of molded products, there are cases where it is not possible to make a sufficient quality determination just by monitoring the parameters that have been proposed in the past.
本発明の目的は新しいパラメータを導入するこ
とによつて成形品の良否判別の可能性を高めるこ
とができる射出成形機用成形品良否判別装置を提
供することである。
An object of the present invention is to provide a molded product quality determination device for an injection molding machine that can increase the possibility of determining the quality of molded products by introducing new parameters.
本発明の他の目的はパラメータの設定幅を成形
品に応じて調整できる成形品良否判別装置を提供
することである。 Another object of the present invention is to provide a molded product quality determination device that can adjust the setting range of parameters depending on the molded product.
本発明の更に他の目的は射出成形機のエジエク
ターが油圧、空圧、及び電動のいずれによつて駆
動されていても適用できる成形品良否判別装置を
提供することである。 Still another object of the present invention is to provide a molded product quality determination device that can be applied regardless of whether the ejector of an injection molding machine is driven hydraulically, pneumatically, or electrically.
本発明によれば、良否判別用パラメータとし
て、エジエクタにかかる力を検出（監視）し、こ
の検出値を設定された上下限値と比較する。比較
の結果、検出値が上下限値の範囲内にないことが
判明すれば、成形品を不良品と判定する。本発明
では、上下限値を設定するために、一対の可変設
定器を使用する。
According to the present invention, the force applied to the ejector is detected (monitored) as a parameter for determining quality, and this detected value is compared with set upper and lower limit values. As a result of the comparison, if it is found that the detected value is not within the range of the upper and lower limits, the molded product is determined to be defective. In the present invention, a pair of variable setting devices are used to set the upper and lower limit values.
第１図は本発明の一実施例を示すもので、成形
品良否判別装置は油圧エジエクタを有する射出成
形機に適用されている。ここでは、まず、射出成
形機について説明する。図示した射出成形機は固
定側金型１０及び可動側金型１１とを有し、両金
型間には樹脂を注入されるべきキヤビテイ１２が
形成されている。可動側金型１１には、油圧エジ
エクタの一部を形成するエジエクタプレート１４
が取り付けられており、このエジエクタプレート
１４から可動側金型１１を通してキヤビテイ１２
まで達するエジエクタピン１５が延在している。
この実施例では、金型１０，１１を型開きした
後、エジエクタピン１５により、キヤビテイ１２
から成形品を離型する時にエジエクタピン（ロツ
ド）にかかる圧力を検出する。
FIG. 1 shows an embodiment of the present invention, in which a molded product quality determination device is applied to an injection molding machine having a hydraulic ejector. Here, first, the injection molding machine will be explained. The illustrated injection molding machine has a fixed mold 10 and a movable mold 11, and a cavity 12 into which resin is injected is formed between the two molds. The movable mold 11 includes an ejector plate 14 that forms a part of the hydraulic ejector.
is attached, and the cavity 12 is passed from the ejector plate 14 through the movable mold 11.
An ejector pin 15 extends thereto.
In this embodiment, after opening the molds 10 and 11, the ejector pin 15 closes the cavity 12.
Detects the pressure applied to the ejector pin (rod) when releasing the molded product from the mold.
油圧エジエクタはエジエクタ用油圧シリンダ１
６及び油圧シリンダ１６内に一端を封止されたエ
ジエクタロツド１７とを備えている。エジエクタ
ロツド１７は油圧配管１８及び電磁弁１９を介し
て油圧ポンプ２０から油圧シリンダ１６内に供給
される圧油により、図の左右方向に移動する。エ
ジエクタロツド１７の動作は公知であるので、こ
こでは説明を省略する。 Hydraulic ejector is hydraulic cylinder 1 for ejector.
6 and an ejector rod 17 whose one end is sealed within the hydraulic cylinder 16. The ejector rod 17 is moved in the left-right direction in the figure by pressure oil supplied into the hydraulic cylinder 16 from a hydraulic pump 20 via a hydraulic pipe 18 and a solenoid valve 19. Since the operation of the ejector rod 17 is well known, the explanation thereof will be omitted here.
本発明に係る成形品判別装置は油圧配管１８に
連結された油圧センサ２５を有している。油圧セ
ンサ２５はエジエクタロツド１７が成形品を突き
出し、離型したときにロツド１７に加わる圧力を
検出し、検出された圧力を第１及び第２の比較器
２６及び２７に入力する。第１の比較器２６に
は、上限設定器２８から上限設定値が与えられて
おり、他方、第２の比較器２７には、下限設定器
２９から下限設定値が与えられており、上下限設
定値により設定幅を規定している。ここで、上下
限設定器２８及び２９としては、各設定値を調整
できるものを使用する。 The molded product discrimination device according to the present invention includes a hydraulic sensor 25 connected to a hydraulic pipe 18. The oil pressure sensor 25 detects the pressure applied to the ejector rod 17 when the molded product is ejected and released from the mold, and inputs the detected pressure to the first and second comparators 26 and 27. The first comparator 26 is given the upper limit set value from the upper limit setter 28, while the second comparator 27 is given the lower limit set value from the lower limit setter 29, and the upper and lower limits The setting width is defined by the setting value. Here, as the upper and lower limit setters 28 and 29, devices that can adjust each setting value are used.
各比較器２６及び２７の比較結果は信号出力装
置２１に出力され、検出された圧力が上及び下限
設定値によつて定まる設定幅を逸脱しているとき
には、信号出力装置３１は警報ランプ３２を点灯
させるような信号を送出する。この信号は成形品
が不良であることをあらわしているから不良品信
号と呼ぶ。またこの不良品信号は成形品取出機
（又は反転シユート）３３にも送られ、成形品取
出機３３は不良品信号に応じて、不良成形品を良
品と区別して取り出す。 The comparison results of each comparator 26 and 27 are output to the signal output device 21, and when the detected pressure deviates from the set range determined by the upper and lower limit set values, the signal output device 31 turns on the alarm lamp 32. Sends a signal that turns on the light. This signal is called a defective product signal because it indicates that the molded product is defective. This defective product signal is also sent to a molded product take-out machine (or reversing chute) 33, and the molded product take-out machine 33 distinguishes defective molded products from good products and takes them out according to the defective product signal.
第１の比較器２６において、検出された圧力が
上限設定値を越えるのは、例えば計量オーバー等
によりキヤビテイ内に過大な樹脂が充填された場
合である。これは、成形品が金型から離れにくく
なり、エジエクタロツド１７に働く力が増大する
ためである。 The pressure detected by the first comparator 26 exceeds the upper limit set value when, for example, an excessive amount of resin is filled into the cavity due to over-metering. This is because the molded product becomes difficult to separate from the mold, and the force acting on the ejector rod 17 increases.
他方、第２の比較器２７からの出力によつて不
良品信号が発生するのは、例えば、計量不足、射
出速度不足等によりキヤビテイ内に過少な樹脂し
か充填されなかつたときである。これは、成形品
がキヤビテイから極度に離れやすくなり、エジエ
クタロツド１７に働く力が減少するためである。 On the other hand, a defective product signal is generated by the output from the second comparator 27 when, for example, too little resin is filled into the cavity due to insufficient metering, insufficient injection speed, or the like. This is because the molded product becomes extremely easy to separate from the cavity, and the force acting on the ejector rod 17 decreases.
上記した実施例では油圧センサ２５を用いて圧
力を検出したが、破線で示すように、圧力センサ
３５を直接エジエクタプレート１４とエジエクタ
ロツド１７との間に取り付け、この圧力センサ３
５の検出圧力を第１及び第２の比較器２６及び２
７に入力するように構成してもよい。 In the embodiment described above, the pressure was detected using the oil pressure sensor 25, but as shown by the broken line, the pressure sensor 35 is directly attached between the ejector plate 14 and the ejector rod 17, and the pressure sensor 35
5 is detected by the first and second comparators 26 and 2.
7 may be input.
第２図は本発明の他の実施例を示すもので、成
形品良否判別装置は電動エジエクタを有する射出
成形機に適用されている。 FIG. 2 shows another embodiment of the present invention, in which the molded product quality determination device is applied to an injection molding machine having an electric ejector.
図示した電動エジエクタは電動機４１、電動機
４１に連結されたギヤ４２、及びボールスクリユ
ー４３とを備え、電動機４１の回転ギヤ４２を介
してボールスクリユー４３に伝達され、エジエク
タロツド１７を前後進させる。 The illustrated electric ejector includes an electric motor 41, a gear 42 connected to the electric motor 41, and a ball screw 43. Power is transmitted to the ball screw 43 through the rotating gear 42 of the electric motor 41 to move the ejector rod 17 back and forth.
図示された成形品良否判別装置は離型時に電動
機４１に流れる電流を検出する電流検出器４５を
備えている。電動機４１に流れる電流はエジエク
タロツド１７に加わる圧力に比例しているから、
電流検出器４５は等価的にエジエクタの圧力を検
出することになる。なお第１図の実施例の場合と
同様に、エジエクタプレート１４とエジエクタロ
ツド１７との間に設けた圧力センサ３５の出力を
監視してもよい。 The illustrated apparatus for determining the quality of molded products includes a current detector 45 that detects the current flowing through the motor 41 during mold release. Since the current flowing through the motor 41 is proportional to the pressure applied to the ejector rod 17,
The current detector 45 equivalently detects the pressure of the ejector. Incidentally, as in the case of the embodiment shown in FIG. 1, the output of the pressure sensor 35 provided between the ejector plate 14 and the ejector rod 17 may be monitored.
以上述べたように、本発明では、成形品良否の
判定を行なうパラメータとして離型時にエジエク
タにかかる力を検出し、この圧力検出値と設定値
とを比較することにより成形品の良否を判定して
いる。このため、成形品の良否判別の可能性が拡
大され、性能の向上が計れる。
As described above, in the present invention, the force applied to the ejector during mold release is detected as a parameter for determining the quality of the molded product, and the quality of the molded product is determined by comparing this detected pressure value with a set value. ing. Therefore, the possibility of determining whether the molded product is good or bad is expanded, and performance can be improved.
第１図は本発明の一実施例に係る成形品良否判
別装置を射出成形の一部と共に示すブロツク図及
び第２図は本発明の他の実施例に係る成形品良否
判別装置を示す図である。
記号の説明、２５：油圧センサ、２６，２７：
比較器、２８，２９：上下限設定器、３２：警報
ランプ、３３：成形品取出機、３５：圧力セン
サ、４５：電流検出器。
FIG. 1 is a block diagram showing a molded product quality determination device according to one embodiment of the present invention together with a part of injection molding, and FIG. 2 is a diagram showing a molded product quality determination device according to another embodiment of the present invention. be. Explanation of symbols, 25: Oil pressure sensor, 26, 27:
Comparator, 28, 29: Upper and lower limit setter, 32: Alarm lamp, 33: Molded product extractor, 35: Pressure sensor, 45: Current detector.
Claims (1)
該射出成形機によつて成形された成形品の良否を
判別する成形品良否判別装置において、前記エジ
エクタにかかる力を検出する検出手段と、前記圧
力の上下限値を設定することにより設定幅を定め
る調整可能な設定手段と、前記検出手段で検出さ
れた検出値と前記上下限値とを比較する比較手段
と、前記比較手段における比較の結果、前記検出
された検出値が前記設定幅を逸脱している場合に
は、成形品の不良を指示する手段とを有すること
を特徴とする成形品良否判別装置。1 Used in an injection molding machine with an ejector,
The molded product quality determination device for determining the quality of molded products molded by the injection molding machine includes a detection means for detecting the force applied to the ejector, and a setting range by setting upper and lower limits of the pressure. an adjustable setting means for determining, a comparison means for comparing the detection value detected by the detection means with the upper and lower limit values, and a comparison means in which the detected detection value deviates from the setting range as a result of the comparison by the comparison means; A device for determining quality of a molded product, comprising means for indicating that the molded product is defective if the molded product is found to be defective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18890284A JPS6166621A (en) | 1984-09-11 | 1984-09-11 | Discreminating device for quality of molded product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18890284A JPS6166621A (en) | 1984-09-11 | 1984-09-11 | Discreminating device for quality of molded product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6166621A JPS6166621A (en) | 1986-04-05 |
| JPH0374611B2 true JPH0374611B2 (en) | 1991-11-27 |
Family
ID=16231878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18890284A Granted JPS6166621A (en) | 1984-09-11 | 1984-09-11 | Discreminating device for quality of molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6166621A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61182916A (en) * | 1985-02-09 | 1986-08-15 | Nissei Plastics Ind Co | Quality judging device of molded article in injection molding machine |
| JP3441680B2 (en) * | 1999-07-28 | 2003-09-02 | ファナック株式会社 | Ejector control device for injection molding machine |
| US8425216B2 (en) * | 2011-03-11 | 2013-04-23 | Mold-Masters (2007) Limited | Cycle counting system for injection molding assembly |
| JP2020168836A (en) * | 2019-04-05 | 2020-10-15 | 芝浦機械株式会社 | Molding machine |
-
1984
- 1984-09-11 JP JP18890284A patent/JPS6166621A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6166621A (en) | 1986-04-05 |
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