JPH0474627A - Acceptance inspecting device of molded product - Google Patents

Acceptance inspecting device of molded product

Info

Publication number
JPH0474627A
JPH0474627A JP18702690A JP18702690A JPH0474627A JP H0474627 A JPH0474627 A JP H0474627A JP 18702690 A JP18702690 A JP 18702690A JP 18702690 A JP18702690 A JP 18702690A JP H0474627 A JPH0474627 A JP H0474627A
Authority
JP
Japan
Prior art keywords
pressure
pattern
detected
molded product
deviation
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.)
Pending
Application number
JP18702690A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Imatomi
芳幸 今冨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP18702690A priority Critical patent/JPH0474627A/en
Publication of JPH0474627A publication Critical patent/JPH0474627A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/7686Measuring, controlling or regulating the ejected articles, e.g. weight control

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To determine precisely quality, by a method wherein a deviation pattern between a detected pressure pattern, which is detected resin pressure at an injection end of a heating cylinder, and a reference pressure pattern at the time of the optimum molding is compared with an established level range. CONSTITUTION:Injection molding is performed experimentally, a resin pressure pattern at the time of the optimum molding is established as a reference pressure pattern and after the same is stored in a memory part 24, injection molding is executed. A detected pressure signal is applied to a device 25 to be discriminated and stored along with a time function and stored as the detected pressure pattern. Then both the patterns are applied in order to a subtracter 26, the deviation between the patterns is obtained, held in a waveform holding part 29 and applied to comparators 30, 31 with which an upper limit monitoring pressure setting apparatus 32 and lower limit monitoring pressure setting apparatus 33 are connected respectively. At the time when a deviation pattern comes off from an established level range by being decided by the comparators 30, 31 and an OR gate 34, a defect detection signal is sent out. Resin pressure is detected by an injection end of a heating cylinder like this and quality of a molded product can be determined precisely without necessitating to incorporate a pressure sensor in every mold.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は射出成形品の良否を判別するための成形品良否
判別装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a molded product quality determination device for determining the quality of injection molded products.

(従来の技術) 一般に射出成形機では、加熱シリンダー スクリュー、
及び駆動装置を備えており、スクリューを駆動装置によ
って前進させることによって加熱シリンダー内に蓄えら
れた溶融樹脂を金型キャビティーに射出して成形品を成
形している。
(Conventional technology) In general, injection molding machines use heating cylinder screws,
and a drive device, and by moving the screw forward by the drive device, the molten resin stored in the heating cylinder is injected into the mold cavity to form a molded product.

上述のようにして成形された成形品にはぼり及びひけ等
の欠陥が発生することがあり、このような不良品と良品
とを予め判別する必要がある。
Molded products molded as described above may have defects such as bulges and sink marks, and it is necessary to distinguish between such defective products and non-defective products in advance.

ところで、一般に、成形品の欠陥は金型内における樹脂
の状態(例えば、金型内における樹脂の流速及び金型内
における樹脂圧力)との相関が極めて強く、このため、
従来、成形品の良否を判別する際には、金型内における
樹脂の状態(例えば、金型内圧力パターン)を検出して
、この検出圧力パターンと予め定められた基準圧力パタ
ーンとを比較することによって成形品の良否を判別する
ことが行われている(例えば、特開昭59−22432
3号公報)。
By the way, defects in molded products generally have a very strong correlation with the state of the resin in the mold (for example, the flow rate of the resin in the mold and the resin pressure in the mold), and therefore,
Conventionally, when determining the quality of a molded product, the state of the resin in the mold (for example, the pressure pattern inside the mold) is detected, and this detected pressure pattern is compared with a predetermined reference pressure pattern. The quality of molded products is determined by
Publication No. 3).

(発明が解決しようとする課題) ところが、従来の良否判別では、金型内圧力パターンを
検出しているから、金型を変える都度、つまり、金型毎
に圧力センサー等を組み込まなければならず、金型のコ
ストが上昇してしまうという問題点がある。
(Problem to be solved by the invention) However, since conventional pass/fail determination detects the pressure pattern inside the mold, it is necessary to install a pressure sensor, etc. every time the mold is changed, that is, for each mold. However, there is a problem in that the cost of the mold increases.

さらに、金型内に圧力センサーを組み込むことか極めて
難しい場合もある。
Additionally, it can be extremely difficult to incorporate pressure sensors into the mold.

本発明の目的は金型毎に圧力センサーを組み込む必要が
なく、しかも極めて精度よく成形品の良否を判別するこ
とのできる成形品良否判別装置を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide a molded product quality determination device that does not require a pressure sensor to be installed in each mold and can determine the quality of a molded product with extremely high accuracy.

(課題を解決するための手段) 本発明による成形品良否判別装置では、溶融樹脂の樹脂
圧力を検出して検出圧力信号を送出する圧力検出手段と
、射出工程及び保圧工程における最適成形時の圧力曲線
が基準圧力パターンとして記憶された第1の記憶手段と
、検出圧力信号を受け、射出工程及び保圧工程における
検出圧力パターンを記憶する第2の記憶手段と、基準圧
力パターンと検出圧力パターンとの偏差を求め、偏差パ
ターンとして出力する偏差生成手段と、この偏差パター
ンが予め設定されたレベル範囲から外れた際不良信号を
送出する判定手段とを有することを特徴としている。
(Means for Solving the Problems) The molded product quality determination device according to the present invention includes a pressure detection means that detects the resin pressure of molten resin and sends out a detected pressure signal, and a pressure detection means that detects the resin pressure of molten resin and sends out a detected pressure signal, and a first storage means in which the pressure curve is stored as a reference pressure pattern; a second storage means that receives the detected pressure signal and stores the detected pressure pattern in the injection process and the pressure holding process; and the reference pressure pattern and the detected pressure pattern. The present invention is characterized by comprising a deviation generating means for calculating the deviation from the deviation pattern and outputting it as a deviation pattern, and a determining means for sending out a defect signal when this deviation pattern deviates from a preset level range.

さらに、本発明による成形品良否判別装置では、さらに
良否判別のための監視時間を設定する監視時間設定手段
と、監視時間中において偏差パターンを判定手段に供給
する供給手段とを備えるようにしてもよく、上記の樹脂
圧力は加熱シリンダーの射出端で検出するようにするこ
とが望ましい。
Furthermore, the molded product quality determination apparatus according to the present invention may further include a monitoring time setting means for setting a monitoring time for determining quality, and a supply means for supplying the deviation pattern to the determination means during the monitoring time. It is often desirable to detect the resin pressure at the injection end of the heating cylinder.

(作用) 本発明では、射出工程及び保圧工程に亘って加熱シリン
ダーの射出端で樹脂圧力を検出して検出圧力パターンを
得る。そして、この検出圧力パターンと最適成形時にお
ける基準圧力パターンとの偏差を偏差パターンとして求
めて、この偏差パターンが予め設定されたレベル範囲を
外れた際、不良品であると判定している。
(Function) In the present invention, the resin pressure is detected at the injection end of the heating cylinder during the injection process and the pressure holding process to obtain a detected pressure pattern. Then, the deviation between this detected pressure pattern and the reference pressure pattern during optimal molding is determined as a deviation pattern, and when this deviation pattern is out of a preset level range, it is determined that the product is defective.

このように、本発明では加熱シリンダーの射出端で樹脂
圧力を検出しているから、金型毎に圧力センサーを組み
込む必要がなく、しかも最適成形時における基準圧力パ
ターンを基準として成形品の良否を判定しているから精
度よく良否判定かできる。
In this way, in the present invention, the resin pressure is detected at the injection end of the heating cylinder, so there is no need to incorporate a pressure sensor in each mold, and the quality of the molded product can be determined based on the standard pressure pattern during optimal molding. Since it is being judged, it is possible to judge pass/fail with high accuracy.

(実施例) 以下本発明について実施例によって説明する。(Example) The present invention will be explained below with reference to Examples.

第1図を参照して、固定金型11に対向して可動金型1
2が配置されており、固定金型11及び可動金型12が
型締された際、金型キャビティー13が形成される。
Referring to FIG. 1, a movable mold 1 is placed opposite a fixed mold 11.
2 are arranged, and when the fixed mold 11 and the movable mold 12 are clamped, a mold cavity 13 is formed.

金型キャビティー13にはスプルー13aを介して加熱
シリンダー14のノズル14aか連結されている。加熱
シリンダー14内にはスクリュー15が進退自在にかつ
回転可能に配置され、スクリュー15は油圧駆動装置1
6によって前進駆動されるとともにモーター17によっ
て回転される。
A nozzle 14a of a heating cylinder 14 is connected to the mold cavity 13 via a sprue 13a. A screw 15 is disposed within the heating cylinder 14 so as to be able to move forward and backward and rotate.The screw 15 is connected to the hydraulic drive device 1.
6 and rotated by a motor 17.

つまり、スクリュー15は油圧シリンダー16aを貫通
しており、このスクリュー15は油圧シリンダー16a
内に配置されたピストン部材16bに取り付けられてい
る。また、スクリュー15の後端にモーター17が取り
付けられており、モーター17の回転、つまり、スクリ
ュー15の回転によってホッパー14bから原料樹脂が
加熱シリンダー14内に取り込まれ、可塑化されて溶融
樹脂となる。
That is, the screw 15 passes through the hydraulic cylinder 16a, and this screw 15 passes through the hydraulic cylinder 16a.
It is attached to a piston member 16b disposed within. Further, a motor 17 is attached to the rear end of the screw 15, and by the rotation of the motor 17, that is, the rotation of the screw 15, raw resin is taken into the heating cylinder 14 from the hopper 14b, and is plasticized and becomes molten resin. .

図示のように、スクリュー15にはスクリューの変位(
前進位置)を検出するデジタル変位検出器18、スクリ
ュー15の前進速度を検出する速度検出器19が配設さ
れている。さらに、ノズル14aにはノズル端と逆流防
止リング(図示せず)との間において、樹脂圧力を検出
するための圧力検出器(圧力センサー)20が配設され
、この圧力センサー20は良否判別装置21に接続され
ている。
As shown in the figure, the screw 15 has a displacement of the screw (
A digital displacement detector 18 for detecting the forward position of the screw 15 and a speed detector 19 for detecting the forward speed of the screw 15 are provided. Furthermore, a pressure detector (pressure sensor) 20 for detecting resin pressure is disposed between the nozzle end and a backflow prevention ring (not shown) in the nozzle 14a, and this pressure sensor 20 is connected to a quality determination device. It is connected to 21.

射出工程(充填工程)が開始されると、デジタル変位検
出器18からスクリュー位置信号か送出され、速度検出
器19からスクリュー速度信号が送出される。また、圧
力センサー20から圧力検出信号が送出される。そして
、図示しない制御装置に、例えば、スクリュー位置検出
信号及びスクリュー速度検出信号が与えられ、制御装置
は予め設定されたスクリュー速度−位置設定パターンに
基づいて油圧駆動装置16に与える油圧力を制御する。
When the injection process (filling process) is started, the digital displacement detector 18 sends out a screw position signal, and the speed detector 19 sends out a screw speed signal. Further, a pressure detection signal is sent from the pressure sensor 20. For example, a screw position detection signal and a screw speed detection signal are given to a control device (not shown), and the control device controls the hydraulic pressure applied to the hydraulic drive device 16 based on a preset screw speed-position setting pattern. .

これによって、スクリューの速度制御が行われる。射出
工程から保圧工程に移行すると、制御装置は、例えば、
予め設定された保圧パターンに基づいて油圧駆動装置1
6を制御する。この際、圧力検出信号は時間の経過にと
もなって、例えば、第2図に示すように変化する。
This controls the speed of the screw. When transitioning from the injection process to the holding pressure process, the control device, for example,
Hydraulic drive device 1 based on a preset pressure holding pattern
Control 6. At this time, the pressure detection signal changes over time, for example, as shown in FIG. 2.

ここで、第3図も参照して、成形品の良否判別を実施す
る際には、実際に成形品の連続成形する前に、試験的に
射出成形を実施して、最適成形時(つまり、良品が成形
された時)における樹脂圧力パターンを基準圧力パター
ンとして設定する。
Here, referring also to FIG. 3, when determining the quality of a molded product, before actually continuously molding the molded product, test injection molding is performed and the optimal molding time (i.e., The resin pressure pattern at the time when a non-defective product is molded is set as the reference pressure pattern.

つまり、切替スイッチ23において接点23aと接点2
3bとか接続され、圧力センサー20から増幅器22及
び切替スイッチ23を介して基準パターン記憶部24に
検出圧力信号を入力する。基準記憶部24では検出圧力
信号を時間関数として、つまり、基準圧力パターンとし
て格納する。
In other words, in the changeover switch 23, the contact 23a and the contact 2
3b, and inputs a detected pressure signal from the pressure sensor 20 to the reference pattern storage section 24 via the amplifier 22 and changeover switch 23. The reference storage unit 24 stores the detected pressure signal as a time function, that is, as a reference pressure pattern.

上述のようにして、基準圧力パターンを基準パターン記
憶部24に格納した後、切替スイッチ23は接点23a
と接点23Cとが接続される。そして、連続して射出成
形が実行される。1射出成形サイクルにおいて、検出圧
力信号が時間関数として被判別記憶部25に入力され、
検出圧力パターンとして格納される。
After storing the reference pressure pattern in the reference pattern storage unit 24 as described above, the changeover switch 23 closes the contact 23a.
and contact 23C are connected. Then, injection molding is performed continuously. In one injection molding cycle, the detected pressure signal is input to the storage unit 25 as a time function,
Stored as a detected pressure pattern.

ここでは、基準圧力パターンを第4図に実線で示すパタ
ーンとし、検出圧力パターンを第4図に破線で示すパタ
ーンであるとする 上述のようにして、被判別記憶部25に検出圧力パター
ンが格納された後、基準圧力パターンと検出圧力パター
ンとが同期して、つまり、同一のクロック信号によって
読み出され、順次減算器26に入力される。減算器26
では、基準圧力パターンと検出圧力パターンとの偏差が
とられる。その結果、第5図に破線で示すように、偏差
パターンが出力される。
Here, the reference pressure pattern is the pattern shown by the solid line in FIG. 4, and the detected pressure pattern is the pattern shown by the broken line in FIG. After that, the reference pressure pattern and the detected pressure pattern are read out synchronously, that is, by the same clock signal, and are sequentially input to the subtractor 26. Subtractor 26
Then, the deviation between the reference pressure pattern and the detected pressure pattern is taken. As a result, a deviation pattern is output as shown by the broken line in FIG.

ところで、監視時間設定器27には監視時間が設定され
ており、この監視時間の間スイッチ28が閉しられる。
By the way, a monitoring time is set in the monitoring time setting device 27, and the switch 28 is closed during this monitoring time.

具体的には、第1の設定器27aで時間t1を設定し、
第2の設定器27bで時間t2 (t+ <t2)を設
定すると、タイマー270から時間(j2’t+)の間
、監視タイミング信号が送出され、この監視タイミング
信号によってスイッチ28が閉じられる。なお、設定時
間を及びt2は射出工程から保圧工程への切り替わりを
考慮して、つまり、射出工程から保圧工程への切替点が
含まれるように設定される。そして、上記の偏差パター
ンは一旦波形保持部2つに保持される。
Specifically, time t1 is set with the first setting device 27a,
When time t2 (t+ <t2) is set by the second setter 27b, a monitoring timing signal is sent from the timer 270 for a time (j2't+), and the switch 28 is closed by this monitoring timing signal. Note that the set time and t2 are set in consideration of switching from the injection process to the pressure holding process, that is, so as to include the switching point from the injection process to the pressure holding process. Then, the above deviation pattern is temporarily held in two waveform holding sections.

波形保持部29から出力された偏差パターンは第1及び
第2の比較器30及び31に入力される。
The deviation pattern output from the waveform holding section 29 is input to first and second comparators 30 and 31.

第1及び第2の比較器30及び31には図示のようにそ
れぞれ上限監視圧力設定器32及び下限監視圧力設定器
33が接続されている。上限監視圧力設定器32には予
め上限監視圧力レベルが設定されており、一方、下限監
視圧力設定器33には予め下限監視圧力レベルが設定さ
れている。第1の比較器30では偏差パターンが上限監
視圧力レベルを越えると、ハイ(High)レベル信号
を送出する。また、第2の比較器31では偏差バ−短が
下限監視圧力レベルを下回ると、ハイレベル信号を送出
する。
As shown in the figure, an upper limit monitoring pressure setting device 32 and a lower limit monitoring pressure setting device 33 are connected to the first and second comparators 30 and 31, respectively. The upper limit monitoring pressure setting device 32 has an upper limit monitoring pressure level set in advance, while the lower limit monitoring pressure setting device 33 has a lower limit monitoring pressure level set in advance. The first comparator 30 sends out a high level signal when the deviation pattern exceeds the upper limit monitoring pressure level. Further, the second comparator 31 sends out a high level signal when the deviation bar shortness falls below the lower limit monitoring pressure level.

ここでは、第5図に示すように、偏差パターンが下限監
視圧力レベルを下回っているから、第2の比較器31か
らハイレベル信号が送出される(一方、第1の比較器3
0からはロウレベル信号か出力される)。これらハイレ
ベル信号及びロウレベル信号はORゲート34に与えら
れ、その結果、ORゲート34はハイレベル信号を送出
する。
Here, as shown in FIG. 5, since the deviation pattern is below the lower limit monitoring pressure level, a high level signal is sent from the second comparator 31 (on the other hand, the first comparator 3
From 0, a low level signal is output). These high level signals and low level signals are applied to the OR gate 34, and as a result, the OR gate 34 sends out a high level signal.

そして、ORゲート34からハイレベル信号が送出され
た際、成形品不良と判定される。
Then, when a high level signal is sent from the OR gate 34, it is determined that the molded product is defective.

このように、第1及び第2、の比較器30及び31とO
Rゲート34とによって判定手段が構成され、偏差パタ
ーンが予め設定されたレベル範囲から外れた際、不良検
知信号(ハイレベル信号)が送出されることになる。
In this way, the first and second comparators 30 and 31 and O
The R gate 34 constitutes a determining means, and when the deviation pattern deviates from a preset level range, a defect detection signal (high level signal) is sent out.

なお、上述の実施例では、監視タイミング信号とを用い
てスイッチ28を所定時間開じるようにしたが、監視タ
イミング信号及びスイッチ28は必ずしも必要ではな(
、減算器26と波形保持部29とを直接接続するように
してもよい。
In the above embodiment, the switch 28 is opened for a predetermined period of time using the monitoring timing signal, but the monitoring timing signal and the switch 28 are not necessarily required.
, the subtracter 26 and the waveform holding section 29 may be directly connected.

(発明の効果) 以上説明したように、本発明では加熱シリンダーの射出
端で樹脂圧力を検出しているから、金型毎に圧力センサ
ーを組み込む必要がなく、しかも最適成形時における基
準圧力パターンを基準として成形品の良否を判定してい
るから精度よく成形品の良否判定することができるとい
う効果がある。
(Effects of the Invention) As explained above, in the present invention, the resin pressure is detected at the injection end of the heating cylinder, so there is no need to incorporate a pressure sensor in each mold, and moreover, the reference pressure pattern during optimal molding can be detected. Since the quality of the molded product is determined as a reference, there is an effect that it is possible to accurately determine the quality of the molded product.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明が°適用される射出成形機の一実施例を
示す図、第2図は射出工程及び保圧工程における樹脂圧
力の一例を示す図、第3図は本発明による成形品良否判
別装置の一実施例を示すブロック図、第4図は基準圧力
パターン及び検出圧力パターンの一例を示す図、第5図
は上限監視圧力レベル及び下限監視圧力レベルと偏差パ
ターンとの関係を示す図である。 11・・−固定金型、12・・・移動金型、13・・・
金型キャビティー 14・・・加熱シリンダー 15・
・・スクリュー 16・・・油圧駆動装置、17・・・
モーター18・・・デジタル変位検出器、19・・・速
度検出器、20・・・圧力センサー 21・・・良否判
別装置、22・・・増幅器、23・・・切替スイッチ、
24・・・基準バタン記憶部、25・・・被判別パター
ン記憶部、26・・・減算器、27・・・監視時間設定
器、28・・・スイッチ、29・・・波形保持部、30
.31・・・比較器、32・・・上限監視圧力設定器、
33・・・下限監視圧力設定器、34・・・ORゲート
。 始 j
Fig. 1 shows an example of an injection molding machine to which the present invention is applied, Fig. 2 shows an example of resin pressure in the injection process and pressure holding process, and Fig. 3 shows a molded product according to the invention. FIG. 4 is a block diagram showing an example of a quality determination device. FIG. 4 is a diagram showing an example of a reference pressure pattern and a detected pressure pattern. FIG. 5 is a diagram showing the relationship between the upper limit monitoring pressure level, the lower limit monitoring pressure level, and the deviation pattern. It is a diagram. 11...-fixed mold, 12... movable mold, 13...
Mold cavity 14... Heating cylinder 15.
...Screw 16...Hydraulic drive device, 17...
Motor 18...Digital displacement detector, 19...Speed detector, 20...Pressure sensor 21...Quality determination device, 22...Amplifier, 23...Selector switch,
24... Reference button storage section, 25... Discriminated pattern storage section, 26... Subtractor, 27... Monitoring time setter, 28... Switch, 29... Waveform holding section, 30
.. 31... Comparator, 32... Upper limit monitoring pressure setting device,
33... Lower limit monitoring pressure setting device, 34... OR gate. beginning

Claims (1)

【特許請求の範囲】 1、溶融樹脂を蓄える加熱シリンダーと、該加熱シリン
ダー内に進退自在にしかも回転可能に配置されたスクリ
ューと、前記スクリューを前進駆動する駆動装置とを有
し、前記溶融樹脂を金型キャビティーに射出して成形品
を成形する射出成形機に用いられ、前記溶融樹脂の樹脂
圧力を検出して検出圧力信号を送出する圧力検出手段と
、射出工程及び保圧工程における最適成形時の圧力曲線
が基準圧力パターンとして記憶された第1の記憶手段と
、前記検出圧力信号を受け、前記射出工程及び前記保圧
工程における検出圧力パターンを記憶する第2の記憶手
段と、前記基準圧力パターンと前記検出圧力パターンと
の偏差を求め、偏差パターンとして出力する偏差生成手
段と、該偏差パターンが予め設定されたレベル範囲から
外れた際不良信号を送出する判定手段とを有することを
特徴とする成形品良否判別装置。 2、特許請求の範囲第1項に記載された成形品良否判別
装置において、さらに良否判別のための監視時間を設定
する監視時間設定手段と、前記監視時間中において前記
偏差パターンを前記判定手段に供給する供給手段とを有
することを特徴とする成形品良否判別装置。3、特許請
求の範囲第1項又は第2項に記載された成形品良否判別
装置において、前記樹脂圧力を前記加熱シリンダーの射
出端で検出するようにしたことを特徴とする成形品良否
判別装置。
[Scope of Claims] 1. A heating cylinder for storing molten resin, a screw disposed in the heating cylinder so as to be movable and rotatable, and a drive device for driving the screw forward; A pressure detection means used in an injection molding machine that molds a molded product by injecting the molten resin into a mold cavity, and detects the resin pressure of the molten resin and sends out a detected pressure signal; a first storage means in which a pressure curve during molding is stored as a reference pressure pattern; a second storage means for receiving the detected pressure signal and storing the detected pressure pattern in the injection step and the pressure holding step; The method further comprises: a deviation generating means for determining a deviation between a reference pressure pattern and the detected pressure pattern and outputting it as a deviation pattern; and a determining means for sending a defect signal when the deviation pattern deviates from a preset level range. Features a molded product quality determination device. 2. The apparatus for determining the quality of a molded product as set forth in claim 1 further includes monitoring time setting means for setting a monitoring time for determining quality, and the deviation pattern being transmitted to the determining means during the monitoring time. 1. A molded product quality determination device, comprising a supply means. 3. The molded product quality determination device as set forth in claim 1 or 2, wherein the resin pressure is detected at the injection end of the heating cylinder. .
JP18702690A 1990-07-17 1990-07-17 Acceptance inspecting device of molded product Pending JPH0474627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18702690A JPH0474627A (en) 1990-07-17 1990-07-17 Acceptance inspecting device of molded product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18702690A JPH0474627A (en) 1990-07-17 1990-07-17 Acceptance inspecting device of molded product

Publications (1)

Publication Number Publication Date
JPH0474627A true JPH0474627A (en) 1992-03-10

Family

ID=16198895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18702690A Pending JPH0474627A (en) 1990-07-17 1990-07-17 Acceptance inspecting device of molded product

Country Status (1)

Country Link
JP (1) JPH0474627A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007143812A1 (en) * 2006-06-16 2007-12-21 Husky Injection Molding Systems Ltd. Preventative maintenance indicator system
US9975172B2 (en) 2006-06-16 2018-05-22 Husky Injection Molding Systems Ltd. Preventative maintenance system
WO2020246555A1 (en) 2019-06-06 2020-12-10 花王株式会社 Particle-containing composition

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61197218A (en) * 1985-02-27 1986-09-01 Okuma Mach Works Ltd Monitoring method for molding of injection molding machine
JPS62187009A (en) * 1986-02-14 1987-08-15 Toyo Kikai Kinzoku Kk Molding condition monitor for injection molding machine
JPS6419331A (en) * 1988-01-28 1989-01-23 Minolta Camera Kk Automatic rewinding camera
JPH0248918A (en) * 1988-05-17 1990-02-19 Fanuc Ltd Deciding device for quality of product of injection molding machine
JPH0278516A (en) * 1988-06-23 1990-03-19 Fanuc Ltd Quality discriminating method of molded product in injection molding machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61197218A (en) * 1985-02-27 1986-09-01 Okuma Mach Works Ltd Monitoring method for molding of injection molding machine
JPS62187009A (en) * 1986-02-14 1987-08-15 Toyo Kikai Kinzoku Kk Molding condition monitor for injection molding machine
JPS6419331A (en) * 1988-01-28 1989-01-23 Minolta Camera Kk Automatic rewinding camera
JPH0248918A (en) * 1988-05-17 1990-02-19 Fanuc Ltd Deciding device for quality of product of injection molding machine
JPH0278516A (en) * 1988-06-23 1990-03-19 Fanuc Ltd Quality discriminating method of molded product in injection molding machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007143812A1 (en) * 2006-06-16 2007-12-21 Husky Injection Molding Systems Ltd. Preventative maintenance indicator system
WO2007143857A1 (en) * 2006-06-16 2007-12-21 Husky Injection Molding Systems Ltd. Preventative maintenance indicator system
US9975172B2 (en) 2006-06-16 2018-05-22 Husky Injection Molding Systems Ltd. Preventative maintenance system
WO2020246555A1 (en) 2019-06-06 2020-12-10 花王株式会社 Particle-containing composition

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