JPH0462022A - Method of judging quality of injection molding - Google Patents
Method of judging quality of injection moldingInfo
- Publication number
- JPH0462022A JPH0462022A JP16542290A JP16542290A JPH0462022A JP H0462022 A JPH0462022 A JP H0462022A JP 16542290 A JP16542290 A JP 16542290A JP 16542290 A JP16542290 A JP 16542290A JP H0462022 A JPH0462022 A JP H0462022A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- resin
- pressure
- injection molding
- injection molded
- 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
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 40
- 239000007924 injection Substances 0.000 claims abstract description 40
- 229920005989 resin Polymers 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 38
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 5
- 239000000057 synthetic resin Substances 0.000 claims abstract description 5
- 238000013441 quality evaluation Methods 0.000 abstract description 10
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- 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） この発明は、射出成形品の品質判定方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for determining the quality of injection molded products.
（従来の技術）
一般に、射出成形品の品質評価項目は数多くあり、また
それぞれの射出成形品の用途によっても要求される品質
が異なる。(Prior Art) Generally, there are many quality evaluation items for injection molded products, and the required quality differs depending on the use of each injection molded product.
従来の射出成形品の品質判定は、例えば、射出成形品の
強度や耐久性等の物性値を判定するには射出成形品全体
あるいはその一部を切り出して適切な試験を行ったり、
同一原料から試験片を作成してその強度や耐久性の試験
を行っていた。Conventional quality determination of injection molded products involves, for example, cutting out the entire injection molded product or a part of it and conducting appropriate tests to determine the physical properties such as strength and durability of the injection molded product.
Test pieces were made from the same raw materials and their strength and durability were tested.
また、射出成形品の所定の寸法や、ひけ及び反り、表面
平滑性、ショートショットやぼり等の不良品の判定は、
射出成形された後の成形品を観察して行っていた。In addition, the prescribed dimensions of injection molded products, and the determination of defects such as sink marks, warpage, surface smoothness, and short shots and flares, are
This was done by observing the molded product after injection molding.
（発明が解決しようとする課題）
ところが、上記したような従来の射出成形品の品質判定
においては、次に述べる問題があった。(Problems to be Solved by the Invention) However, in the conventional quality determination of injection molded products as described above, there were the following problems.
すなわち、上記した従来の射出成形品の品質判定評価に
おいては、射出成形品を金型から取り出した後に、品質
評価工程を設けて実施する必要があるので、多くの品質
項目を実施するには多大な労力を必要とするといった問
題があった。In other words, in the above-mentioned conventional quality evaluation of injection molded products, it is necessary to set up a quality evaluation process after the injection molded product is taken out of the mold. The problem was that it required a lot of effort.
この発明は、上記従来の問題に鑑みてなされたものであ
る。This invention has been made in view of the above-mentioned conventional problems.
また、この発明は、射出成形品のほとんどが、原料樹脂
の可塑化・充填・保圧・冷却・取り出しの段階において
決定されることに着目してなされたものである。Furthermore, this invention was made by focusing on the fact that most of the injection molded products are determined at the stages of plasticizing, filling, holding, cooling, and removing the raw resin.
そして、特に充填・保圧段階に成形品の寸法と重量が決
定されるので、この段階における成形加工パラメータを
成形と同時に射出成形機や金型の内部に配置したセンサ
ーを利用して計測することにより成形品の寸法や重量を
推定する。このことによって、品質評価工程の省力化を
図ることができる射出成形品の品質判定方法を提供する
ことを目的としている。In particular, the dimensions and weight of the molded product are determined during the filling and pressure holding stages, so the molding parameters at this stage can be measured at the same time as molding using sensors placed inside the injection molding machine or mold. Estimate the dimensions and weight of the molded product. The purpose of this invention is to provide a method for determining the quality of injection molded products that can save labor in the quality evaluation process.
（課題を解決するための手段）
この発明は、上記課題を解決するために、射出成形法に
より成形される射出成形品の品質を、射出成形される合
成樹脂の充填・保圧中にセンサーを用いて計測すること
によって得られる樹脂温度、金型温度、樹脂圧等の成形
加工パラメータによって判定するものとした。(Means for Solving the Problems) In order to solve the above problems, this invention uses a sensor to check the quality of injection molded products molded by an injection molding method during filling and holding pressure of synthetic resin to be injection molded. The determination was made based on molding process parameters such as resin temperature, mold temperature, and resin pressure, which were obtained by measuring the resin temperature using the resin.
（作用）
したがって、充填・保圧中における成形加工パラメータ
を成形と同時に射出成形機や金型の内部に配置したセン
サーを利用して計測することにより成形品の寸法や重量
を推定する。(Function) Therefore, the dimensions and weight of the molded product are estimated by measuring the molding process parameters during filling and holding pressure at the same time as the molding using a sensor placed inside the injection molding machine or the mold.
このことによって、品質評価工程の省力化を図ることが
可能である。This makes it possible to save labor in the quality evaluation process.
（実施例）
以下、この発明に係る射出成形品の品質判定方法を、測
定実施結果を示すグラフを参照して、説明する。(Example) Hereinafter, a method for determining the quality of an injection molded product according to the present invention will be described with reference to graphs showing measurement results.
第１図はこの発明に係る射出成形品の品質判定方法を実
施したときにおける金型内に配置した圧力センサーによ
って金型内の樹脂圧を計測したときの成形パターンを示
すグラフ、第２図は射出成形品の重量と金型内の樹脂圧
との相関関係を示すグラフである。FIG. 1 is a graph showing the molding pattern when the resin pressure inside the mold is measured by a pressure sensor placed inside the mold when the method for determining the quality of injection molded products according to the present invention is implemented, and FIG. It is a graph showing the correlation between the weight of an injection molded product and the resin pressure in the mold.
この発明の射出成形品の品質判定方法は、射出成形法に
より成形される射出成形品の品質を、射出成形される合
成樹脂の充填・保圧中にセンサーを用いて計測すること
によって得られる樹脂温度、金型温度、樹脂圧等の成形
加工パラメータによって判定するものである。The method for determining the quality of an injection molded product of the present invention is to measure the quality of an injection molded product molded by an injection molding method using a sensor during filling and holding pressure of a synthetic resin to be injection molded. This is determined based on molding parameters such as temperature, mold temperature, and resin pressure.
次に、この発明を実際に実施した例について説明する。Next, an example of actually implementing this invention will be described.
射出成形品の重量は、計量ストローク、メルトクツショ
ン、樹脂温度、金型温度、スクリューの回転速度、背圧
、型締力、射出速度、保圧、保圧保持時間等の射出成形
条件の設定値が同一の場合に、成形機の作動圧、金型内
の樹脂圧力、ノズルにおける樹脂圧力によって調べるこ
とができる。The weight of the injection molded product is determined by setting injection molding conditions such as metering stroke, melt tension, resin temperature, mold temperature, screw rotation speed, back pressure, mold clamping force, injection speed, holding pressure, holding pressure holding time, etc. If the values are the same, it can be checked by the working pressure of the molding machine, the resin pressure in the mold, and the resin pressure in the nozzle.
このために、成形機の作動圧、金型内の樹脂圧力、ノズ
ルにおける樹脂圧力を射出成形機や金型の中にセンサー
を配置して、これらのセンサーで監視することによって
、射出成形品の重量を間接的に観測することができる。For this purpose, sensors are placed inside the injection molding machine and the mold to monitor the working pressure of the molding machine, the resin pressure in the mold, and the resin pressure in the nozzle. Weight can be observed indirectly.
このことによって、射出成形機、金型内部に配置した各
種センサーからショット毎に得られる射出成形品の重量
を高精度に推定することが可能であることが判った。As a result, it has been found that it is possible to estimate with high accuracy the weight of an injection molded product obtained for each shot from various sensors placed inside the injection molding machine and the mold.
このことに着目して、次に説明するように実施した。Focusing on this, we carried out the experiment as described below.
これは、表１に示す条件での電子バーケージの成形につ
いて行ったものである。This was carried out for molding an electronic bar cage under the conditions shown in Table 1.
表１
金型はダイレクト・サイドゲート方式であり、温調に温
水を使用し、取り出しにはエジェクタービンを使用した
ものを用いた。Table 1 The mold was of a direct side gate type, hot water was used for temperature control, and an ejector turbine was used for ejection.
射出成形品の平均肉厚は１．０■であり、投影面積は約
５００ａＪであり、射出成形品の裏面には多数のボスや
リブが立っている。The injection molded product has an average wall thickness of 1.0 square meters, a projected area of about 500 aJ, and a large number of bosses and ribs on the back surface of the injection molded product.
そして、ゲートから６０ｍｍ離れたところに、水高圧電
式樹脂圧力センサーを取付け、金型内の樹脂圧力を計測
した。Then, a water high voltage electric resin pressure sensor was installed at a distance of 60 mm from the gate, and the resin pressure inside the mold was measured.
そのときの成形パターンを第１図のグラフに示す。The molding pattern at that time is shown in the graph of FIG.
第１図のグラフにおいて、実線は油圧ａ、破線ハノスル
圧ｂ１−点鎖線はスクリュー位ＺＣ，二点鎖線は金型内
の樹脂圧ｄ、三点斜線はスクリュー速度ｅを示している
。In the graph of FIG. 1, the solid line shows the oil pressure a, the dashed line shows the pressure b1 - the dashed line shows the screw position ZC, the two-dot chain line shows the resin pressure d in the mold, and the three-dot diagonal line shows the screw speed e.
第１図のグラフに示すように、射出開始直後に、油圧ａ
とノズル圧すは急激に立ち上がり、数秒遅れて金型内の
樹脂圧ｄが立ち上がる。As shown in the graph of Figure 1, immediately after the start of injection, the oil pressure a
The nozzle pressure rises rapidly, and after a few seconds the resin pressure inside the mold rises.
保圧は約１２秒まで保持しているが、金型内の樹脂圧ｄ
は３秒時のピークを越えた後は、緩やかに低下している
。The holding pressure is maintained for about 12 seconds, but the resin pressure inside the mold
After exceeding the peak at 3 seconds, it gradually declines.
この第１図のグラフにおける金型内の樹脂圧ｄがピーク
になった時点またはその後の樹脂圧ｄを連続的に計測す
る。The resin pressure d at or after the resin pressure d in the mold reaches its peak in the graph of FIG. 1 is continuously measured.
その結果、第２図のグラフに示すように、射出成形品の
重量は、金型内の樹脂圧ｄと強い相関関係を示すことが
判った。As a result, as shown in the graph of FIG. 2, it was found that the weight of the injection molded product showed a strong correlation with the resin pressure d in the mold.
第２図のグラフは、金型内に配置した樹脂圧センサーに
よる保圧時の樹脂圧ｄと、そのとき得られる射出成形品
の重量とのプロットをとったものである。The graph in FIG. 2 is a plot of the resin pressure d during pressure retention measured by a resin pressure sensor placed in the mold and the weight of the injection molded product obtained at that time.
その１時回帰曲線を同時に示すと、その相関性は、Ｒ＝
０．９８６１９であった。If the 1-time regression curve is shown at the same time, the correlation is R=
It was 0.98619.
したがって、この例では、保圧時の金型内の樹脂圧ｄか
らかなり正確な射出成形品の重量を推定することができ
た。Therefore, in this example, the weight of the injection molded product could be estimated fairly accurately from the resin pressure d in the mold during pressure holding.
このことによって、品質評価工程の省力化を図ることが
でき、射出成形品の品質管理項目のうち射出成形品の重
量に関する品質評価の工数を大幅に削減することができ
た。As a result, it was possible to save labor in the quality evaluation process, and it was possible to significantly reduce the number of man-hours for quality evaluation regarding the weight of injection molded products among the quality control items of injection molded products.
更に、この発明の方法を用いて、生産管理コンピュータ
等を介して自動取り出し機に直接命令して不良品を分別
するようにすると、自動的に不良品を除去できる利点が
ある。Further, if the method of the present invention is used to sort out defective products by directly instructing the automatic take-out machine to separate them through a production control computer or the like, there is an advantage that the defective products can be automatically removed.
（発明の効果）
以上説明したように、この発明は、射出成形法により成
形される射出成形品の品質を、射出成形される合成樹脂
の充填・保圧中にセンサーを用いて計測することによっ
て得られる樹脂温度、金型温度、樹脂圧等の成形加工パ
ラメータによって判定するものであるから、以下に述べ
る効果を奏する。(Effects of the Invention) As explained above, the present invention measures the quality of an injection molded product molded by an injection molding method by using a sensor during filling and holding pressure of a synthetic resin to be injection molded. Since the determination is made based on molding parameters such as the resulting resin temperature, mold temperature, and resin pressure, the following effects are achieved.
すなわち、充填・保圧中における成形加工パラメータを
成形と同時に射出成形機や金型の内部に配置したセンサ
ーを利用して計測することにより成形品の寸法や重量を
推定する。That is, the dimensions and weight of the molded product are estimated by measuring the molding process parameters during filling and pressure holding using a sensor placed inside the injection molding machine or mold at the same time as molding.
このことによって、品質評価工程の省力化を図ることが
でき、射出成形品の品質評価の工数を大幅に削減するこ
とができる。As a result, it is possible to save labor in the quality evaluation process, and the number of man-hours for quality evaluation of injection molded products can be significantly reduced.
第１図はこの発明に係る射出成形品の品質判定方法を実
施したときにおける金型内に配置した圧力センサーによ
って金型内の樹脂圧を計測したときの成形パターンを示
すグラフ、第２図は射出成形品の重量と金型内の樹脂圧
との相関関係を示すグラフである。FIG. 1 is a graph showing the molding pattern when the resin pressure inside the mold is measured by a pressure sensor placed inside the mold when the method for determining the quality of injection molded products according to the present invention is implemented, and FIG. It is a graph showing the correlation between the weight of an injection molded product and the resin pressure in the mold.
Claims (1)
射出成形される合成樹脂の充填・保圧中にセンサーを用
いて計測することによって得られる樹脂温度、金型温度
、樹脂圧等の成形加工パラメータによって判定すること
を特徴とする射出成形品の品質判定方法。1) The quality of injection molded products molded using the injection molding method,
The quality of an injection molded product is determined by molding process parameters such as resin temperature, mold temperature, and resin pressure, which are obtained by measuring using a sensor during filling and holding pressure of synthetic resin to be injection molded. Judgment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16542290A JPH0462022A (en) | 1990-06-22 | 1990-06-22 | Method of judging quality of injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16542290A JPH0462022A (en) | 1990-06-22 | 1990-06-22 | Method of judging quality of injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0462022A true JPH0462022A (en) | 1992-02-27 |
Family
ID=15812125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16542290A Pending JPH0462022A (en) | 1990-06-22 | 1990-06-22 | Method of judging quality of injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0462022A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07256711A (en) * | 1994-03-22 | 1995-10-09 | Japan Steel Works Ltd:The | Method and apparatus for estimating resin pressure in injection mold |
| KR20010016543A (en) * | 2000-12-07 | 2001-03-05 | 민병현 | On-line Quality Monitoring of Injection Molded Parts using Indirect Control Parameters |
| CN111163914A (en) * | 2017-10-05 | 2020-05-15 | 艾姆弗勒克斯有限公司 | Real-time material and speed control in a molding system |
-
1990
- 1990-06-22 JP JP16542290A patent/JPH0462022A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07256711A (en) * | 1994-03-22 | 1995-10-09 | Japan Steel Works Ltd:The | Method and apparatus for estimating resin pressure in injection mold |
| KR20010016543A (en) * | 2000-12-07 | 2001-03-05 | 민병현 | On-line Quality Monitoring of Injection Molded Parts using Indirect Control Parameters |
| US11623378B2 (en) | 2017-06-29 | 2023-04-11 | iMFLUX Inc. | Real time material and velocity control in a molding system |
| CN111163914A (en) * | 2017-10-05 | 2020-05-15 | 艾姆弗勒克斯有限公司 | Real-time material and speed control in a molding system |
| CN111163914B (en) * | 2017-10-05 | 2022-06-21 | 艾姆弗勒克斯有限公司 | Real-time material and speed control in a molding system |
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