JPH0466686B2 - - Google Patents
Info
- Publication number
- JPH0466686B2 JPH0466686B2 JP59046920A JP4692084A JPH0466686B2 JP H0466686 B2 JPH0466686 B2 JP H0466686B2 JP 59046920 A JP59046920 A JP 59046920A JP 4692084 A JP4692084 A JP 4692084A JP H0466686 B2 JPH0466686 B2 JP H0466686B2
- Authority
- JP
- Japan
- Prior art keywords
- mold release
- mold
- release force
- molded product
- time
- 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
- 238000000465 moulding Methods 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000012806 monitoring device Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 8
- 239000004033 plastic Substances 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 241000252084 Anguilla Species 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 230000000007 visual 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
- B29C45/7626—Measuring, controlling or regulating the ejection or removal of moulded articles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
- G01L5/0076—Force sensors associated with manufacturing machines
-
- 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
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
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、圧縮成形、ホツトパリソ
ン成形等金型を用いた熱可塑性樹脂成形加工法に
おいて、金型から成形品が離型するときこれらの
間に働く抵抗（離型力）を連続的に測定し、異常
時に警報等一定の動作をとるための監視装置に関
するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to a thermoplastic resin molding process using a mold such as injection molding, compression molding, hot parison molding, etc. when a molded product is released from the mold. This relates to a monitoring device that continuously measures the resistance (mold release force) acting between these and takes certain actions such as alarms in the event of an abnormality.
（発明が解決すべき従来技術の問題点）
成形品が金型から離型する動作において成形品
表面と金型表面が相対的変位を生じるとき（摺動
するとき）の抵抗が成形品に外力として加わる。
成形品の離型に必要なこの外力（離型力）によ
り、成形品はまず、あたかも接着剤で金型に貼り
ついているような粘着挙動を示す。この時の力は
静摩擦といわれる。粘着挙動が終つた後（金型か
らの剥離後）、通常の動摩擦による摺動となる。
第１図は正常な離型が行なわれているときの前述
の挙動を示す。この第１図でわかることは、成形
品が金型から剥離するのにかなり大きな離型力が
極めて微小な変位のうちに発生し、成形品が金型
から剥離すると、離型力が小さくなるということ
である。離型力により成形品に働く応力が成形品
の機械的強度を越えると、成形品は塑性変形し、
場合によつては破断する。塑性変形が起ると、離
型力のピーク値は、第１図に示される正常な離型
時のピーク値F1よりさらに大きく、ピーク値を
越えるまでには正常な離型時以上の変位が必要と
なる。第２図は塑性変形が起つたときの成形品の
挙動（粘着挙動、摺動）を示す。粘着挙動中ステ
イツク・スリツプ現象ａを呈することもある。第
２図の状態では離型力が正常な離型時のピーク値
F1より大きく、かつ、ピーク値を示すまでの変
位が大きすぎて塑性変形が生じているので、成形
品は不良品となる。(Problems of the prior art to be solved by the invention) When the molded product is released from the mold, the resistance when the molded product surface and the mold surface cause relative displacement (sliding) causes an external force on the molded product. Join as.
Due to this external force (mold release force) necessary to release the molded product, the molded product first exhibits adhesive behavior as if it were stuck to the mold with adhesive. The force at this time is called static friction. After the adhesion behavior ends (after peeling from the mold), sliding occurs due to normal dynamic friction.
FIG. 1 shows the above-mentioned behavior during normal demolding. What can be seen in Figure 1 is that a fairly large mold release force is generated within an extremely small displacement when the molded product peels off from the mold, and when the molded product peels off from the mold, the mold release force becomes smaller. That's what it means. When the stress exerted on the molded product by the mold release force exceeds the mechanical strength of the molded product, the molded product deforms plastically.
In some cases, it may break. When plastic deformation occurs, the peak value of the mold release force is even larger than the peak value F 1 during normal mold release shown in Figure 1, and by the time the peak value is exceeded, the displacement is greater than that during normal mold release. Is required. Figure 2 shows the behavior (adhesive behavior, sliding) of the molded product when plastic deformation occurs. During adhesive behavior, a stick-slip phenomenon a may occur. In the state shown in Figure 2, the mold release force is at its peak value during normal mold release.
The molded product is defective because it is larger than F 1 and the displacement before reaching the peak value is too large and plastic deformation has occurred.
そこで、成形品にかかる離型力を連続的に測定
すれば、これが正常な離型時のピーク値F1より
一定以上高かつたり、ピーク値を示すまでの変位
が大きすぎるとき（型開き速度または突出し速度
が一定で、時間がかかりすぎるとき）、塑性変形
が生じて離型が正常に行なわれなかつたと判断で
きるはずである。 Therefore, if we continuously measure the mold release force applied to the molded product, we can find out if it is higher than the peak value F 1 during normal mold release by more than a certain level, or if the displacement to reach the peak value is too large (mold opening speed (or when the ejection speed is constant and takes too long), it should be determined that plastic deformation has occurred and mold release was not performed normally.
しかしながら、従来、成形品の離型性は、感覚
（視覚、聴覚）的なものと考えられており、作業
員が離型時の音や成形品についた突出しピンの跡
等から勘と経験によつて判断していた。このた
め、成形状況の数値的管理ができず、また不良品
の発生を防止できないという不具合を免れなかつ
た。 However, conventionally, the releasability of molded products has been considered to be a sensory (visual, auditory) thing, and workers rely on their intuition and experience based on the sounds made during mold release, the marks left by ejector pins on the molded product, etc. I was making a judgment. For this reason, it was impossible to numerically control the molding situation, and the production of defective products could not be prevented.
（発明の目的）
本発明は、前記従来の問題点を解決するために
創案されたもので、成形品の離型性の数値的評価
である離型力（突出し力等）を測定することによ
り成形状況を監視し、成形品が不良品となるとき
異常信号を発生させて警報等一定の動作がとれる
ようにすることを目的とする。(Purpose of the Invention) The present invention was devised to solve the above-mentioned conventional problems, and is based on the measurement of mold release force (ejection force, etc.), which is a numerical evaluation of the mold releasability of a molded product. The purpose is to monitor the molding status and generate an abnormal signal when a molded product becomes defective so that certain actions such as an alarm can be taken.
（発明の構成）
本発明の成形品離型監視装置は、成形機におけ
る成形品の離型時に離型力によつて歪または流体
圧を生じる突出ピン、アンギユラピン或はシリン
ダに設けられた離型力検出用の検出器と、許容離
型力設定器と、該設定器で設定された許容離型力
と前記検出器で検出された離型力とを比較する比
較器と、成形機の離型動作開始時からの比較器動
作時間を設定する監視時間帯設定用のタイマーと
を備えたことを特徴とする。(Structure of the Invention) The molded product release monitoring device of the present invention is a mold release monitoring device that is installed on a protruding pin, an angular pin, or a cylinder that generates strain or fluid pressure due to mold release force when a molded product is released from a mold in a molding machine. A detector for detecting force, an allowable mold release force setting device, a comparator for comparing the allowable mold release force set by the setting device with the mold release force detected by the detector, and a molding machine release force setter. The present invention is characterized by comprising a timer for setting a monitoring time period for setting a comparator operating time from the start of mold operation.
（実施例）
以下本発明の一実施例を第３図〜第５図により
説明すると、図中１は固定側金型で、固定側プラ
テン２に装着されており、該金型１にはアンギユ
ラピン３が装着されている。４は可動側金型で、
可動側プラテン５に装着されており、該金型４に
は、アンギユラピン３を嵌挿可能なガイド孔６を
有するスライドコア７，…が型開閉方向と略直角
方向に摺動可能に装着され、かつ、突出し板８に
装着された突出部しピン９，…が型開閉方向に摺
動可能に装着されている。１０は突出しシリンダ
で、その突出しロツド１１で突出し板８を移動可
能に可動側プラテン５に装着されている。この突
出しシリンダ１０にはその作動用油圧回路１２が
接続されている。かくして、可動側プラテン５
を、これに装着したタイバーに案内させて型締シ
リンダ１３により固定側プラテン２に対して前進
することによりスライドコア付割り金型を閉じて
キヤビテイを形成し、型締め完了後該キヤビテイ
内に射出シリンダ１４により樹脂を射出してアン
ダカツト部を有する成形品Ｍを成形し、しかる後
割り金型を開き、突出しシリンダ１０により突出
しピン９，…を介して成形品Ｍを突出す一連の動
作が行なえる構成となつている。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 3 is installed. 4 is the movable side mold,
A slide core 7, which has a guide hole 6 into which the angular pin 3 can be inserted, is attached to the mold 4 so as to be slidable in a direction substantially perpendicular to the mold opening/closing direction. Further, protrusion pins 9, . . . attached to the protrusion plate 8 are attached so as to be slidable in the mold opening/closing direction. Reference numeral 10 denotes a protruding cylinder, which is attached to the movable platen 5 so that the protruding plate 8 can be moved by its protruding rod 11. An operating hydraulic circuit 12 is connected to this protruding cylinder 10. Thus, the movable platen 5
is guided by the tie bar attached to this and moved forward against the stationary platen 2 by the mold clamping cylinder 13, thereby closing the split mold with the slide core to form a cavity, and after mold clamping is completed, the mold is injected into the cavity. A series of operations are performed in which resin is injected by the cylinder 14 to form a molded product M having an undercut portion, the split mold is opened, and the molded product M is ejected by the ejecting cylinder 10 via the ejecting pins 9, . . . The structure is as follows.
本発明は、このような射出成形機等において、
成形品Ｍの離型時に離型力によつて歪または油圧
が集中的に生じる突出ピン、アンキユラピン或は
シリンダ等に離型力検出用の検出器１５を設け、
該検出器１５に増巾器１６を接続し、突出しシリ
ンダ１０のロツド突出し信号または型開き信号に
より閉動作するリレー接点１７と、該リレー接点
１７の閉動作信号により閉動作し、これと同時に
働く監視時間帯タイマー１８により一定時間Ｔの
経過後開き動作する限時復帰接点１９とを介して
前記増巾器１６に比較器２０を接続し、該比較器
２０に設定器２１により離型力Ｆ（＞F1）を設定
可能にすると共に、比較器２０で設定離型力Ｆと
前記検出器１５で検出された離型力とを比較して
検出値の方が大きいときに働く許容時間タイマー
２２により一定時間ｔ（＜Ｔ）の経過後閉じ動作
する限時動作接点２３を介して前記比較器２０に
増巾器２４を接続し、該増巾器２４に警報器等を
接続してなる監視装置を特徴とする。 The present invention provides such an injection molding machine, etc.
A detector 15 for detecting mold release force is provided on a protruding pin, annular pin, cylinder, etc. where strain or hydraulic pressure is concentrated due to mold release force when releasing the molded product M,
An amplifier 16 is connected to the detector 15, and a relay contact 17 is operated to close by a rod ejection signal or a mold opening signal from the ejection cylinder 10, and a relay contact 17 is closed by a closing operation signal of the relay contact 17, and operates simultaneously. A comparator 20 is connected to the amplifier 16 via a time-limited return contact 19 that opens after a predetermined time T has elapsed due to a monitoring time zone timer 18, and a mold release force F ( >F 1 ), and a comparator 20 compares the set mold release force F with the mold release force detected by the detector 15, and an allowable time timer 22 operates when the detected value is larger. An amplifier 24 is connected to the comparator 20 via a time-limited operation contact 23 that closes after a certain period of time t (<T) has elapsed, and an alarm or the like is connected to the amplifier 24. It is characterized by
離型力の測定方法には、成形品Ｍの形状、金型
の構造に対応した最適なものを使用することが好
ましい。以下に主な測定方法を説明する。 It is preferable to use the optimum method for measuring the mold release force that corresponds to the shape of the molded product M and the structure of the mold. The main measurement methods are explained below.
(1) 固定側金型１から可動側金型５を後退させて
型開きするときの油圧を型締シリンダ１３の油
圧回路２５に設けられた圧力センサP1により
検出して離型力を測定する方法。(1) Pressure sensor P 1 installed in the hydraulic circuit 25 of the mold clamping cylinder 13 detects the hydraulic pressure when the movable mold 5 is moved back from the fixed mold 1 to open the mold, and the mold release force is measured. how to.
(2) ネジ部形成用のコアが油圧モータで回転する
とき、またはスライドコアが油圧シリンダで後
退するときの油圧を圧力センサにより検出して
離型力を測定する方法。(2) A method in which the mold release force is measured by detecting the hydraulic pressure using a pressure sensor when the thread-forming core is rotated by a hydraulic motor or when the slide core is retreated by a hydraulic cylinder.
上記(1)，(2)の方法では、検出値に金型の摺動抵
抗、油圧シリンダのピストンの摺動抵抗等が含ま
れてしまい、離型力を正確に測定するのが難かし
いから、測定精度をより上げるためには、次の
(3)，(4)，(5)の方法により離型力だけを測定する方
がよい。 With methods (1) and (2) above, the detected value includes the sliding resistance of the mold, the sliding resistance of the piston of the hydraulic cylinder, etc., making it difficult to accurately measure the mold release force. , in order to further increase the measurement accuracy, the following
It is better to measure only the mold release force using methods (3), (4), and (5).
(3) 突出しシリンダ１０が成形品Ｍを突出すとき
の油圧を油圧回路１２に設けられた圧力センサ
P2により検出して離型力を測定する方法。(3) A pressure sensor installed in the hydraulic circuit 12 detects the hydraulic pressure when the ejecting cylinder 10 ejects the molded product M.
Method of measuring mold release force by detection by P 2 .
(4) 金型の局部、つまり成形品の品質を左右する
最重要な部分から成形品を離型させるため、離
型力が直接かかる部品、たとえば突出しピン、
突出し板、スライドコア等に小型のロードセル
を組込んで、これにより離型力を測定する方
法。(4) In order to release the molded product from local parts of the mold, that is, the most important parts that affect the quality of the molded product, parts that are directly subjected to mold release force, such as ejector pins,
A method of measuring mold release force by incorporating a small load cell into a protruding plate, slide core, etc.
突出し板に組込む場合、第３図に示されるよう
に、突出しピン９の基端を離型側から支持する突
出し板８の突出しピン装着部にロードセルL1を
設け、スライドコアに組込む場合、同図に示され
るように、スライドコア７のアンギユラピンガイ
ド部にアンギユラピン３に離型側から接触するピ
ン２６を設け、該ピン２６を介してロードセル
L2を設ければよい。 When assembling the ejector into a slide core, the load cell L1 is provided at the ejector pin attachment part of the ejector plate 8 that supports the proximal end of the ejector pin 9 from the mold release side, as shown in FIG. As shown in the figure, a pin 26 that contacts the angular pin 3 from the mold release side is provided in the angular pin guide portion of the slide core 7, and a load cell is connected to the angular pin 3 through the pin 26.
It is sufficient to provide L 2 .
(5) 突出し板と突出しシリンダの突出しロツドと
の間にロードセルL3を設け、これにより離型
力を測定する方法。(5) A method of measuring the mold release force by installing a load cell L3 between the ejecting plate and the ejecting rod of the ejecting cylinder.
突出し板に設ける場合、第３図に示されるよう
に、突出しロツド１１が当接する突出し板８の突
出しロツド当接部にロードセルL3を装着すれば
よい。 When provided on a protruding plate, the load cell L3 may be mounted on the protruding rod abutting portion of the protruding plate 8 that the protruding rod 11 comes into contact with, as shown in FIG.
検出器１５による検出に当つては、監視時間帯
タイマー１８により、各成形サイクルにおける監
視時間帯を設定しておく。監視時間帯を設定しな
いと、例えばロードセルL3の場合、第５図に示
されるように、設定品の突出しに伴い検出値が変
化し、突出し板８を全ストローク前進させた後で
は突出しシリンダ１０の推力まで検出してしま
う。また、ロードセルL1の場合、射出による樹
脂圧力も検出してしまうからである。 For detection by the detector 15, a monitoring time period in each molding cycle is set by a monitoring period timer 18. If a monitoring time period is not set, for example, in the case of load cell L3 , the detected value will change as the set item is ejected, as shown in FIG. It detects up to the thrust of Further, in the case of the load cell L1 , the resin pressure caused by injection is also detected.
検出精度を上げるためには、成形機の離型動作
は極めて低速で行なうことが必要である。例えば
毎秒40mmで突出すとき、0.2mmの変位を検出する
時間は0.005秒となつてしまい、それだけ高速で
検出するには検出器の応答性および信号処理回路
の特性から困難となるからである。0.05秒で0.2
mmの変位を検出することはでき、このときの速度
毎秒４mmは突出しピンの低速突出しまたはスライ
ドコア７の低速後退によつてのみ可能となる。 In order to improve detection accuracy, it is necessary to perform the mold release operation of the molding machine at an extremely low speed. For example, when protruding at 40 mm per second, the time to detect a displacement of 0.2 mm is 0.005 seconds, and it is difficult to detect at that high speed due to the responsiveness of the detector and the characteristics of the signal processing circuit. 0.2 in 0.05 seconds
It is possible to detect a displacement of mm, and a speed of 4 mm per second is only possible by slow ejection of the ejector pin or slow retraction of the slide core 7.
更に、離型力の測定に当つては、許容時間タイ
マー２２により、過大離型力が働いても成形品に
塑性変形が生じない経過時間（許容時間）ｔを設
定しておき、離型力と時間の双方から監視すれ
ば、より高度な離型力の監視ができる。 Furthermore, when measuring the mold release force, the allowable time timer 22 is used to set an elapsed time (permissible time) t during which no plastic deformation occurs in the molded product even if an excessive mold release force is applied, and the mold release force is measured. By monitoring from both the time and the time, it is possible to monitor the mold release force at a higher level.
（作用）
型締シリンダ１３により可動側金型４を後退さ
せて型開きし、突出しシリンダ１０により成形品
Ｍを突出すと、検出器１５が突出し板８、突出し
シリンダ１０等に生じる歪または油圧を検出し、
この検出信号が増巾器１６により増巾されて比較
器２０に入力する。比較器２０において、設定器
２１で入力された設定値と検出器１５側から入力
した検出値とが比較される。この比較動作は、監
視時間帯タイマー１８で設定した監視時間Ｔの範
囲だけ行なわれる。第７図に示されている如く、
検出値が設定値Ｆより大きくなるか、或は第６図
に示されている如く検出値が設定値Ｆより大きく
かつ、この状態が許容時間タイマー２２で設定し
た許容時間ｔ継続すると、異常信号が比較器２０
から発信され、増巾器２４で増巾されて警報器等
に送られる。この異常信号によつて、成形機の動
作（型開き動作、突出し動作）を停止させたり、
またはその動作を続行させながら警報を発するこ
とも可能である。(Function) When the movable mold 4 is moved backward by the mold clamping cylinder 13 to open the mold, and the molded product M is ejected by the ejecting cylinder 10, the detector 15 detects the strain or oil pressure generated in the ejecting plate 8, ejecting cylinder 10, etc. detect,
This detection signal is amplified by an amplifier 16 and input to a comparator 20. In the comparator 20, the setting value inputted by the setting device 21 and the detection value inputted from the detector 15 side are compared. This comparison operation is performed only within the monitoring time T set by the monitoring time period timer 18. As shown in Figure 7,
If the detected value becomes larger than the set value F, or if the detected value is larger than the set value F as shown in FIG. 6 and this state continues for the permissible time t set by the permissible time timer 22, an abnormality signal is comparator 20
The signal is transmitted from the amplifier 24, amplified by the amplifier 24, and sent to an alarm device, etc. This abnormal signal causes the operation of the molding machine (mold opening operation, ejection operation) to be stopped,
Alternatively, it is also possible to issue an alarm while continuing the operation.
また、成形品の種類によつては第７図に示され
る如く、検出値が設定値Ｆより大きくても、許容
時間ｔも続かない場合は、限時動作接点２３が閉
じ動作せず、比較器２０から異常信号が発信され
ないようにしても良い。 Depending on the type of molded product, as shown in FIG. 7, even if the detected value is greater than the set value F, if the allowable time t does not last, the time-limited operation contact 23 will not close and the comparator will The abnormal signal may not be transmitted from 20.
従つて、異常信号の有無により成形状況を判断
できることになる。 Therefore, the molding status can be determined based on the presence or absence of an abnormal signal.
（発明の効果）
以上の通り、本発明は、離型力（突出し力等）
或は離型力とその作用する時間を測定して離型時
成形品に塑性変形が起る程大きな離型力が作用し
たとき異常信号を発生させることができる構成で
あるから、成形品の品質管理（良否判別）が確実
にできる。特に、離型力に対して成形品強度が不
充分な成形材料（例えば射出成形用セラミツク）
については有効である。また、異常信号によつ
て、成形機の動作停止、警報等の他、金型の掃除
や離型剤の塗布等きめのこまかい成形状況の管理
が可能となるし、例えばポリカーボネイト等離型
性の悪い樹脂材料においても、離型剤噴霧のタイ
ミングを知るのに有効であるし、また成形材料の
いかんにかかわらず金型のキヤビテイ表面の汚
れ、傷等の経時変化も判定できる。(Effect of the invention) As described above, the present invention provides mold release force (ejection force, etc.)
Alternatively, the structure can measure the mold release force and the time during which it acts, and generate an abnormal signal when the mold release force is large enough to cause plastic deformation on the molded product during demolding. Quality control (pass/fail determination) can be performed reliably. In particular, molding materials with insufficient molded product strength against mold release force (e.g. ceramics for injection molding)
It is valid for In addition, the abnormality signal makes it possible to stop the operation of the molding machine, give an alarm, etc., and also to control detailed molding conditions such as cleaning the mold and applying a mold release agent. It is effective in knowing the timing of spraying the mold release agent even when using a bad resin material, and it is also possible to determine changes over time such as stains and scratches on the cavity surface of the mold, regardless of the molding material.
第１図、第２図は射出成形品の離型状況を示す
離型力と変位の関係線図、第３図は射出成形機と
検出器の設置位置を示す概要図、第４図は本発明
の一実施例を示す系統図、第５図は型開き時にお
ける離型力と時間の関係線図、第６図、第７図、
第８図は成形状況の判断方法を示す離型力と時間
の関係線図である。
１……固定側金型、３……アンギユラピン、４
……可動側金型、６……ガイド孔、７……スライ
ドコア、８……突出し板、９……突出しピン、１
０……突出しシリンダ、１１……突出しロツド、
１２，２５……油圧回路、１３……型締シリン
ダ、１５……検出器。１６，２４……増巾器、１
７……リレー接点、１８，２２……タイマー、１
９……限時復帰接点、２０……比較器、２１……
設定器、２３……限時動作接点、P1，P2……圧
力センサ、L1，L2，L3……ロードセル、２６…
…ピン。
Figures 1 and 2 are relationship diagrams between mold release force and displacement showing the mold release status of injection molded products, Figure 3 is a schematic diagram showing the installation positions of the injection molding machine and detector, and Figure 4 is the main A system diagram showing an embodiment of the invention, FIG. 5 is a relationship diagram between mold release force and time during mold opening, FIGS. 6 and 7,
FIG. 8 is a relationship diagram between mold release force and time showing a method for determining the molding status. 1...Fixed side mold, 3...Anguilla pin, 4
...Movable side mold, 6...Guide hole, 7...Slide core, 8...Ejecting plate, 9...Ejecting pin, 1
0...Protruding cylinder, 11...Protruding rod,
12, 25...Hydraulic circuit, 13...Mold clamping cylinder, 15...Detector. 16, 24... Multiplier, 1
7... Relay contact, 18, 22... Timer, 1
9...Time-limited return contact, 20...Comparator, 21...
Setting device, 23...Time-limited operation contact, P1 , P2 ...Pressure sensor, L1 , L2 , L3 ...Load cell, 26...
…pin.
Claims (1)
つて歪または流体圧を生じる突出ピン、アンギユ
ラピン或はシリンダに設けられた離型力検出用の
検出器と、許容離型力設定器と、該設定器で設定
された許容離型力と前記検出器で検出された離型
力とを比較する比較器と、成形機の離型動作開始
時からの比較器動作時間を設定する監視時間帯タ
イマーとを備えたことを特徴とする成形品離型監
視装置。 ２ 許容時間タイマーとを備えたことを特徴とす
る前記特許請求の範囲第１項記載の成形品離型監
視装置。[Scope of Claims] 1. A detector for detecting mold release force provided on a protruding pin, angular pin, or cylinder that generates strain or fluid pressure due to mold release force during mold release of a molded product in a molding machine, and an allowable A mold release force setting device, a comparator that compares the allowable mold release force set by the setting device and the mold release force detected by the detector, and a comparator operation from the start of the mold release operation of the molding machine. A molded product release monitoring device comprising a monitoring time zone timer for setting a time. 2. The molded product release monitoring device according to claim 1, further comprising a permissible time timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4692084A JPS60190829A (en) | 1984-03-12 | 1984-03-12 | Apparatus for monitoring molded-product releasing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4692084A JPS60190829A (en) | 1984-03-12 | 1984-03-12 | Apparatus for monitoring molded-product releasing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60190829A JPS60190829A (en) | 1985-09-28 |
| JPH0466686B2 true JPH0466686B2 (en) | 1992-10-26 |
Family
ID=12760765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4692084A Granted JPS60190829A (en) | 1984-03-12 | 1984-03-12 | Apparatus for monitoring molded-product releasing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60190829A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3457773B2 (en) * | 1995-07-12 | 2003-10-20 | 日精エー・エス・ビー機械株式会社 | Blow molding apparatus and blow molding method |
| JP3441680B2 (en) * | 1999-07-28 | 2003-09-02 | ファナック株式会社 | Ejector control device for injection molding machine |
| JP3459631B2 (en) * | 2000-11-10 | 2003-10-20 | ファナック株式会社 | Method and apparatus for measuring mold release force |
| JP4042430B2 (en) * | 2002-02-21 | 2008-02-06 | 日立化成工業株式会社 | Method and apparatus for detecting mold release force of molded product |
| US7462319B2 (en) * | 2004-12-13 | 2008-12-09 | Husky Injection Molding Systems Ltd | Injection molding machine apparatus and method with moving platen injection and ejection actuation |
| AT12901U1 (en) * | 2011-09-26 | 2013-01-15 | Engel Austria Gmbh | Drive device for an injection molding machine |
| JP6869010B2 (en) * | 2016-11-16 | 2021-05-12 | 大和化成工業株式会社 | Molding machine maintenance management system and maintenance management method |
| JP2020168836A (en) * | 2019-04-05 | 2020-10-15 | 芝浦機械株式会社 | Molding machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56146713A (en) * | 1980-04-17 | 1981-11-14 | Toshiba Corp | Measuring instrument for mold-releasing force of molding resin |
-
1984
- 1984-03-12 JP JP4692084A patent/JPS60190829A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56146713A (en) * | 1980-04-17 | 1981-11-14 | Toshiba Corp | Measuring instrument for mold-releasing force of molding resin |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60190829A (en) | 1985-09-28 |
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