JPS61182916A - Quality judging device of molded article in injection molding machine - Google Patents
Quality judging device of molded article in injection molding machineInfo
- Publication number
- JPS61182916A JPS61182916A JP2400185A JP2400185A JPS61182916A JP S61182916 A JPS61182916 A JP S61182916A JP 2400185 A JP2400185 A JP 2400185A JP 2400185 A JP2400185 A JP 2400185A JP S61182916 A JPS61182916 A JP S61182916A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- pressure
- reference value
- molding machine
- injection molding
- 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
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
- B29C45/7686—Measuring, controlling or regulating the ejected articles, e.g. weight control
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (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）
本発明は成形品が良品か否かを容易に判定できる射出成
形機における成形品の品質判定装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a quality determination device for molded products in an injection molding machine that can easily determine whether a molded product is a good product or not.
（従来の技術）
熱可塑性樹脂を用いた射出成形において、成形時に発生
する不良成形品を判定するための品質判定装置は種々提
案されている。(Prior Art) In injection molding using thermoplastic resin, various quality determination devices have been proposed for determining defective molded products that occur during molding.
代表的なものとしては射出シリンダや金型キャビティ内
の樹脂圧力を監視するもの、或いは射出プランジャを駆
動する油圧回路の油圧を監視するもの等がある。Typical examples include those that monitor the resin pressure in an injection cylinder or mold cavity, or those that monitor the oil pressure of a hydraulic circuit that drives an injection plunger.
このような判定装置の原理はいずれも所定部位の圧力が
適正範囲を外れた場合に成形不良を生ずることに鑑みて
、当該圧力変化を監視して良品か不良品かを判定するも
のであり、通常圧力を検出すべき部位に直接圧力センサ
を臨ませて検出を行っている。The principle of these determination devices is to monitor the pressure change and determine whether the product is good or defective, considering that molding defects occur when the pressure at a predetermined location is out of the appropriate range. Normally, pressure is detected by placing a pressure sensor directly in front of the area where pressure is to be detected.
（発明が解決しようとする問題点）
しかし、斯かる装置をはしめ、従来の品質判定装置はい
ずれも射出充填工程における樹脂圧力又は油圧を監視す
るものであり、したがって、射出充填工程中における刻
々変化する圧力をきわめて短い時間で監視する必要があ
る。このため、正確な監視を行うことが困難であり、特
に高度な成形知識を必要とした。(Problems to be Solved by the Invention) However, all conventional quality determination devices that incorporate such devices monitor resin pressure or oil pressure during the injection filling process, and therefore pressure must be monitored in a very short period of time. For this reason, accurate monitoring is difficult and requires particularly advanced molding knowledge.
また、監視のできるのは専ら射出充填工程中の圧力のみ
であり、品質を左右する他の要因となる樹脂温度、金型
温度、射出速度等の影響を総合的且つ適確に監視するこ
とができない。In addition, only the pressure during the injection filling process can be monitored, and it is not possible to comprehensively and accurately monitor the effects of other factors that affect quality, such as resin temperature, mold temperature, and injection speed. Can not.
さらにまた、高感度高精度の圧力センサを必要とすると
ともにセンサの取付等の構造が複雑化し、しかもその深
作も難しくなる等、大幅なコストアップ、成形品への外
観的悪影響を招来し、実用化且つ汎用化しにくいのが実
情であった。Furthermore, a pressure sensor with high sensitivity and precision is required, and the structure for mounting the sensor becomes complicated, and furthermore, it becomes difficult to manufacture the sensor in depth, resulting in a significant increase in cost and a negative impact on the appearance of the molded product, making it impractical. The reality is that it is difficult to adapt and generalize the technology.
そこで、本発明は上述した問題点を一掃し、正確且つ適
確な判定を行うことができるとともに、低コストで容易
に実施化を行うことができる射出成形機における成形品
の品質判定装置を提供するものである。Therefore, the present invention eliminates the above-mentioned problems and provides a quality determination device for molded products in an injection molding machine that can perform accurate and appropriate determinations and can be easily implemented at low cost. It is something to do.
（問題点を解決するための手段）
本発明は図面に示すように型開閉手段２により金型４の
可動型４ａを開いて成形品３を離型せしめる射出成形機
Ｍに適用した成形品の品質判定装置１に係り、その特徴
とするところは型開き時における金型４に対する上記型
開閉手段２の型開き力を検出する、例えば油圧回路５へ
接続した圧力センサ６を備えてなる検出手段７と、成形
品３の良否に対応した型開き力の基準値（上限値Ｐａ、
下限値ＰＬ）を設定する基準値設定手段８と、検出手段
７の検出値Ｐｏと前記基準値（Ｐｕ、 ＰＬ）を比較し
、その比較結果を出力する比較処理手段９を備えた点に
ある。(Means for Solving the Problems) The present invention is applied to an injection molding machine M in which a movable mold 4a of a mold 4 is opened by a mold opening/closing means 2 to release a molded product 3, as shown in the drawings. The quality determination device 1 is characterized by a detection means comprising, for example, a pressure sensor 6 connected to a hydraulic circuit 5, which detects the mold opening force of the mold opening/closing means 2 against the mold 4 when the mold is opened. 7 and the standard value of the mold opening force (upper limit Pa,
The present invention comprises a reference value setting means 8 for setting a lower limit value PL), and a comparison processing means 9 for comparing the detection value Po of the detection means 7 with the reference value (Pu, PL) and outputting the comparison result. .
（作用） 次に、本発明の作用について説明する。(effect) Next, the operation of the present invention will be explained.
先ず、型開工程は次のようになる。材料が射出充填され
た金型４は図面に示すように型開閉手段２における油圧
回路５の作動により可動型４ａが移動して型開きする。First, the mold opening process is as follows. The mold 4 injected and filled with the material is opened by moving the movable mold 4a by the operation of the hydraulic circuit 5 in the mold opening/closing means 2, as shown in the drawing.
これにより成形品３は固定型４ｂから離型して、可動型
４ａに付着して移動する。As a result, the molded product 3 is released from the fixed mold 4b, and is moved while adhering to the movable mold 4a.
ところで、射出充填圧力の大小は成形品の良否に大きく
影響し、当該圧力が過小であると金型キャビティに成形
材料が完全に充填されない充填不足（ショートショット
）等の成形不良を生じ、他方当該圧力が過大であると成
形材料の過大充填によるオーバーパンク現象やパリ等の
成形不良を生ずることは知られている。By the way, the magnitude of the injection filling pressure greatly affects the quality of the molded product, and if the pressure is too low, molding defects such as insufficient filling (short shot) where the mold cavity is not completely filled with the molding material will occur, and on the other hand, It is known that when the pressure is too high, overfilling of the molding material causes over-punk phenomenon and molding defects such as fringing.
一方、射出充填圧力の大小は離型抵抗（型開き力）とも
相関関係を有する。つまり、当該充填圧力が上昇すると
それに伴って型開き力も大きくなる。なお、当該充填圧
力は成形品３の重量や寸法等の品質に対しても変化を与
える。したがって、金型４に対する型開閉手段２の型開
き力を検出すれば成形品３の品質を判定できる。On the other hand, the magnitude of injection filling pressure also has a correlation with mold release resistance (mold opening force). In other words, as the filling pressure increases, the mold opening force also increases. Note that the filling pressure also changes the quality of the molded product 3, such as its weight and dimensions. Therefore, the quality of the molded product 3 can be determined by detecting the mold opening force of the mold opening/closing means 2 against the mold 4.
よって、型開閉手段２における例えば油圧回路５の油圧
を検出すれば離型抵抗、つまり型開き力に略比例した検
出値ＰＯを得る。そしてこの検出値Ｐｏと、基準値設定
手段８からの基準値（ＰｕとＰＬ）を比較処理手段９に
より比較し、ＰＬ≦Ｐｏ≦Ｐｕであれば良品、ＰＬ＞Ｐ
ｏ、又はＰｕ ＜ Ｐｏであれば不良品と判定し、良否
に対応する判定信号を出力する。Therefore, if the hydraulic pressure of, for example, the hydraulic circuit 5 in the mold opening/closing means 2 is detected, a detected value PO that is approximately proportional to the mold release resistance, that is, the mold opening force is obtained. Then, this detected value Po and the reference values (Pu and PL) from the reference value setting means 8 are compared by the comparison processing means 9, and if PL≦Po≦P, the product is good, and PL>P
o, or if Pu < Po, the product is determined to be defective, and a determination signal corresponding to pass/fail is output.
（実施例）
以下には本発明に係る好適な実施例を挙げ図面を参照し
て詳述する。(Example) Below, preferred examples according to the present invention will be described in detail with reference to the drawings.
図面は本発明に係る品質判定装置を含む射出成形機の縦
断面図である。The drawing is a longitudinal sectional view of an injection molding machine including a quality determination device according to the present invention.
先ず、本発明を明確にするため、射出成形機の全体的構
成について説明する。射出成形機Ｍはインラインスクリ
ュ一式を例示し、この成形機Ｍは射出シリンダ２０とこ
の射出シリンダ２０に回転且つ進退自在に内挿したスク
リュー２１を備える。First, in order to clarify the present invention, the overall configuration of an injection molding machine will be described. The injection molding machine M is an example of a set of in-line screws, and this molding machine M includes an injection cylinder 20 and a screw 21 inserted into the injection cylinder 20 so as to be rotatable and movable back and forth.
射出シリンダ２０の先端にはノズル２２を有し、このノ
ズル２２には固定盤２３に固定した固定型４ｂを受接す
る。この固定型４ｂには対向して前記可動型４ａを配し
、この可動型４ａは一体の可動盤２４によって固定型４
ｂに対し不図示のタイバー上を進退動する。固定型４ｂ
と可動型４ａは金型４を構成し、キャビティ１２、ゲー
ト１３、ランナ１４、スプル１５を有する公知の射出成
形用金型を構成する。The injection cylinder 20 has a nozzle 22 at its tip, and a fixed mold 4b fixed to a fixed platen 23 is received in this nozzle 22. The movable mold 4a is disposed opposite to the fixed mold 4b, and the movable mold 4a is connected to the fixed mold 4 by an integrated movable platen 24.
It moves forward and backward on a tie bar (not shown) with respect to b. Fixed type 4b
The movable mold 4a constitutes a mold 4, which is a known injection mold having a cavity 12, a gate 13, a runner 14, and a sprue 15.
一方、可動盤２４は型開閉手段２に結合する。On the other hand, the movable platen 24 is coupled to the mold opening/closing means 2.
型開閉手段２は可動盤２４の背面に結合した型締ラム３
０を備え、この型締ラム３０の後端は型締シリンダ３１
に摺動自在に内挿したピストン３２に結合する。また、
型締シリンダ３１は前油室３３と後油室３４を備え、各
油室３３と３４には油管３５と３６を接続する。さらに
各油管３５．３６は切換弁３７を介して油圧源３８及び
戻しタンク３９に接続する。これにより前油室３３又は
後油室３４へ油圧源３８から選択的に圧油を供給できる
油圧回路５を構成する。The mold opening/closing means 2 includes a mold clamping ram 3 connected to the back of the movable platen 24.
0, and the rear end of this mold clamping ram 30 is a mold clamping cylinder 31
The piston 32 is slidably inserted into the piston 32. Also,
The mold clamping cylinder 31 includes a front oil chamber 33 and a rear oil chamber 34, and oil pipes 35 and 36 are connected to each oil chamber 33 and 34, respectively. Furthermore, each oil pipe 35 , 36 is connected via a switching valve 37 to an oil pressure source 38 and a return tank 39 . This constitutes a hydraulic circuit 5 that can selectively supply pressure oil from the hydraulic source 38 to the front oil chamber 33 or the rear oil chamber 34.
よって、型開工程では後油室３５へ圧油を供給し、可動
盤２４を型開き方向へ移動せしめ金型４の型開きを行う
。Therefore, in the mold opening process, pressurized oil is supplied to the rear oil chamber 35, the movable platen 24 is moved in the mold opening direction, and the mold 4 is opened.
なお、このような射出成形機Ｍのサイクル工程は次のよ
うになる。The cycle process of such an injection molding machine M is as follows.
先ず、型開工程終了後、型締ラム３０の作動で可動型４
ａと固定型４ｂは型閉めされる。次いで射出充填工程へ
移行する。同工程では所定の圧力によりスクリュー２１
が前進し、その前方に蓄積されている材料Ｗをキャビテ
ィ１２へ充議せしめる。この後スクリュー２１の回転に
よってその前方へ材料ｗｔ−ｉ積する計量工程とともに
、所要の冷却時間をおいた後、前述の型開工程によって
図面のように型開きを行う。この際成形品３は可動型４
ａ側に付いて固定型４ｂのキャビティより取り出される
。そして成形品３は型開後、可動型４ａより離型して取
り出される。First, after the mold opening process is completed, the movable mold 4 is moved by the operation of the mold clamping ram 30.
a and the fixed mold 4b are closed. Next, the process moves to an injection filling process. In the same process, the screw 21 is
moves forward and fills the cavity 12 with the material W accumulated in front of it. Thereafter, along with a measuring process in which the material wt-i is stacked forward by the rotation of the screw 21, and after a required cooling time, the mold is opened in the mold opening process described above as shown in the drawing. At this time, the molded product 3 is the movable mold 4
It is attached to side a and taken out from the cavity of the fixed mold 4b. After the mold is opened, the molded product 3 is released from the movable mold 4a and taken out.
以上で−サイクル工程を終了する。This completes the cycle process.
次に成形品の品質判定装置１について具体的に説明する
。同装置１は型締シリンダの前油室３３に接続する油管
３５に臨んで配設した圧力電気変換機能をもつ圧力セン
サ６と、この圧力センサ６からの検出信号である検出値
Ｐｏと基準値設定器５０からの例えば電圧値設定した基
準値を比較する比較器５１と、この比較器５１の比較結
果を増幅処理する増幅器５２を備えてなる。基準値は下
限値Ｐｕと下限値ＰＬからなり、比較器５１では前述し
たようにＰＬ≦Ｐｏ≦Ｐｕの条件を満たして良品（例え
ばハイレベル信号） 、ＰＬ＞Ｐａ、又はＰｕ ＜ Ｐ
ｏの条件で不良品（例えばローレベル信号）とする判定
信号を出力する。前述のように、射出充填圧力と離型抵
抗（型開き力）は相関関係をもつため型開き圧力である
前油室３３内の油圧、つまり圧力センサ６により油管３
５内の油圧を検出すれば射出充填圧力を知ることができ
、射出充填圧力の過大又は過小に基づき生ずる不良品を
判別できる。なお、ｒ’Ｌ、 Ｐｕ値は成形品の種類、
例えば大きさ、素材、形状等に対応して任意に可変設定
する。Next, the molded product quality determination device 1 will be specifically explained. The device 1 includes a pressure sensor 6 having a pressure-to-electrical conversion function arranged facing an oil pipe 35 connected to a front oil chamber 33 of a mold clamping cylinder, a detection value Po which is a detection signal from this pressure sensor 6, and a reference value. The comparator 51 includes a comparator 51 that compares a reference value, such as a voltage value, from a setter 50, and an amplifier 52 that amplifies the comparison result of the comparator 51. The reference value consists of a lower limit value Pu and a lower limit value PL, and as described above, the comparator 51 satisfies the condition of PL≦Po≦Pu to determine a good product (for example, a high level signal), PL>Pa, or Pu<P.
A determination signal indicating that the product is defective (for example, a low level signal) is output under the condition o. As mentioned above, since the injection filling pressure and mold release resistance (mold opening force) have a correlation, the oil pressure in the front oil chamber 33, which is the mold opening pressure, is detected by the oil pipe 3 by the pressure sensor 6.
By detecting the oil pressure within 5, the injection filling pressure can be known, and defective products caused by excessive or insufficient injection filling pressure can be determined. Note that r'L and Pu values depend on the type of molded product,
For example, it can be arbitrarily set variably depending on the size, material, shape, etc.
一方、判定信号は直接警報手段に供給し、音又は先約手
段によるアラームを作動させる作動信号に利用してもよ
いし、或いは選別装置へ供給して不良品と良品を自動選
別する制御信号に利用してもよい。On the other hand, the judgment signal may be directly supplied to an alarm means and used as an activation signal to activate an alarm by sound or advance means, or it may be supplied to a sorting device and used as a control signal for automatically separating defective products from non-defective products. You may use it.
以上、実施例を説明したが、本発明は斯かる実施例に限
定されるものではない。例えば圧力センサ６は型締シリ
ンダ３１内へ臨ませて取付ける等してもよいし、その他
歪センサ等を用いてもよく、要は型開き力（圧力）を検
出できればよい。また、比較器５１は任意の電気回路で
もよいし、或いはマイクロコンピュータを利用してもよ
い。さらにまた、型開閉手段２の駆動源となる型締シリ
ンダ３１は油圧タイプでも空圧タイプでもよいし、電動
機等の電磁的手段でもよい。このような電動機等を用い
た場合には型開き力の検出として電動機等に流れる電流
の大きさを検出してもよい。その他細部の形状、構造、
配列、数量等において本発明の要旨を逸脱しない任意変
更実施は本発明範囲に許容されるものである。Although embodiments have been described above, the present invention is not limited to these embodiments. For example, the pressure sensor 6 may be mounted facing into the mold clamping cylinder 31, or other strain sensors or the like may be used, as long as it can detect the mold opening force (pressure). Furthermore, the comparator 51 may be any electrical circuit or may utilize a microcomputer. Furthermore, the mold clamping cylinder 31 serving as a driving source for the mold opening/closing means 2 may be of a hydraulic type or a pneumatic type, or may be an electromagnetic means such as an electric motor. When such an electric motor or the like is used, the magnitude of the current flowing through the electric motor or the like may be detected to detect the mold opening force. Other details such as shape, structure,
Arbitrary changes in arrangement, quantity, etc. that do not depart from the gist of the present invention are permitted within the scope of the present invention.
（発明の効果）
このように本発明に係る射出成形機における成形品の品
質判定装置は、型開閉手段により金型の可動型を開いて
成形品を離型せしめる射出成形機において、型開き時に
おける金型に対する前記型開閉手段の型開き力を検出す
る検出手段と、成形品の良否に対応した型開き力の基準
値を設定する基準値設定手段と、前記検出手段の検出値
と前記基準値を比較し、比較結果を出力する比較処理手
段を備えてなるため次の如き著効を得る。(Effects of the Invention) As described above, the quality determination device for a molded product in an injection molding machine according to the present invention can be used in an injection molding machine in which a movable mold of a mold is opened by a mold opening/closing means to release a molded product, when the mold is opened. a detection means for detecting the mold opening force of the mold opening/closing means with respect to the mold; a reference value setting means for setting a reference value of the mold opening force corresponding to the quality of the molded product; and a detection value of the detection means and the standard. Since it is provided with a comparison processing means for comparing values and outputting a comparison result, the following advantages are obtained.
■型開き力を検出するので、いわば成形時における各種
要因を全て含んだ結果物たる成形品の品質を監視でき、
総合的で適確な監視を行うことができる。■Since the mold opening force is detected, it is possible to monitor the quality of the molded product, which is a product that includes all the various factors during molding.
Comprehensive and accurate monitoring can be performed.
■最適な実施態様により圧力センサは型開閉手段の油圧
回路における油管に取付るのみで足りるためきわめて容
易に組立を行うことができ、しかも既存の成形機にも容
易に付設できる。(2) According to the optimum embodiment, the pressure sensor only needs to be attached to the oil pipe in the hydraulic circuit of the mold opening/closing means, so it can be assembled very easily, and it can also be easily attached to an existing molding machine.
■全体に構造が単純化し、上記組立容易性と併せて大幅
なコストダウンを達成でき、実用化も容易で汎用性にも
優れる。■The overall structure is simplified, and in addition to the above-mentioned ease of assembly, a significant cost reduction can be achieved, and it is easy to put into practical use and has excellent versatility.
図面は本発明に係る品質判定装置を含む射出成形機の縮
断側面図。
尚図面中、１・・・成形品の品質判定装置、２・・・型
開閉手段、３・・・成形品、４・・・金型、４ａ・・・
可動型、５・・・油圧回路、６・・・圧力センサ、７・
・・圧力検出手段、８・・・基準値設定手段、９・・・
比較処理手段、Ｍ・・・射出成形機、ＰＯ・・・検出値
、Ｐｕ・・・上限値、ＰＬ・・・下限値。The drawing is a cutaway side view of an injection molding machine including a quality determination device according to the present invention. In the drawings, 1... Quality determination device for molded product, 2... Mold opening/closing means, 3... Molded product, 4... Mold, 4a...
Movable type, 5... Hydraulic circuit, 6... Pressure sensor, 7.
...Pressure detection means, 8...Reference value setting means, 9...
Comparison processing means, M: injection molding machine, PO: detected value, Pu: upper limit value, PL: lower limit value.
Claims (1)
型せしめる射出成形機において、型開き時における金型
に対する前記型開閉手段の型開き力を検出する検出手段
と、成形品の良否に対応した型開き力の基準値を設定す
る基準値設定手段と、前記検出手段の検出値と前記基準
値を比較し、比較結果を出力する比較処理手段を備えた
ことを特徴とする射出成形機における成形品の品質判定
装置。 ２、前記検出手段は型開閉手段における油圧回路へ接続
した油圧を検出する圧力センサを備えてなることを特徴
とする特許請求の範囲第１項記載の射出成形機における
成形品の品質判定装置。 ３、前記基準値は上限値及び下限値に設定してなること
を特徴とする特許請求の範囲第１項記載の射出成形機に
おける成形品の品質判定装置。[Scope of Claims] 1. In an injection molding machine in which a movable mold of a mold is opened by a mold opening/closing means to release a molded product, detection for detecting the mold opening force of the mold opening/closing means against the mold at the time of opening the mold. means, a reference value setting means for setting a reference value of mold opening force corresponding to the quality of the molded product, and a comparison processing means for comparing the detection value of the detection means with the reference value and outputting a comparison result. A quality determination device for molded products in an injection molding machine, characterized by: 2. The quality determination device for a molded product in an injection molding machine according to claim 1, wherein the detection means includes a pressure sensor that detects the hydraulic pressure connected to a hydraulic circuit in the mold opening/closing means. 3. The quality determination device for a molded product in an injection molding machine according to claim 1, wherein the reference value is set to an upper limit value and a lower limit value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2400185A JPS61182916A (en) | 1985-02-09 | 1985-02-09 | Quality judging device of molded article in injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2400185A JPS61182916A (en) | 1985-02-09 | 1985-02-09 | Quality judging device of molded article in injection molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61182916A true JPS61182916A (en) | 1986-08-15 |
| JPH0246137B2 JPH0246137B2 (en) | 1990-10-15 |
Family
ID=12126327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2400185A Granted JPS61182916A (en) | 1985-02-09 | 1985-02-09 | Quality judging device of molded article in injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61182916A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205291A1 (en) * | 2000-11-10 | 2002-05-15 | Fanuc Ltd | Method and apparatus for determining separating force of molded product from mold |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166621A (en) * | 1984-09-11 | 1986-04-05 | Sumitomo Heavy Ind Ltd | Discreminating device for quality of molded product |
-
1985
- 1985-02-09 JP JP2400185A patent/JPS61182916A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166621A (en) * | 1984-09-11 | 1986-04-05 | Sumitomo Heavy Ind Ltd | Discreminating device for quality of molded product |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1205291A1 (en) * | 2000-11-10 | 2002-05-15 | Fanuc Ltd | Method and apparatus for determining separating force of molded product from mold |
| US6616872B2 (en) | 2000-11-10 | 2003-09-09 | Fanuc Ltd | Method of and apparatus for determining separating force of molded product from mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0246137B2 (en) | 1990-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |