JPH02130122A - Apparatus for judging quality of molded product in injection blow molding machine - Google Patents
Apparatus for judging quality of molded product in injection blow molding machineInfo
- Publication number
- JPH02130122A JPH02130122A JP63283965A JP28396588A JPH02130122A JP H02130122 A JPH02130122 A JP H02130122A JP 63283965 A JP63283965 A JP 63283965A JP 28396588 A JP28396588 A JP 28396588A JP H02130122 A JPH02130122 A JP H02130122A
- Authority
- JP
- Japan
- Prior art keywords
- small hole
- molded product
- gap
- injection
- molding machine
- 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
- 238000010102 injection blow moulding Methods 0.000 title claims description 23
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims description 20
- 230000002950 deficient Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は射出吹き込み成形機に関し、特に、射出吹き込
み成形機における成形品の良否判定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an injection blow molding machine, and particularly to an apparatus for determining the quality of molded products in an injection blow molding machine.
［従来の技術］
射出吹き込み成形機における吹き込み工程において、例
えば、成形品のブロー不足、パリ、ショトショット、ミ
スブロー等により不良成形品が発生することが多々ある
。従来、このような成形品の良否の判定は、人力により
定期的に成形品サンプルを採取した状態で行われ、その
成形品サンプルの状態に応じて次の成形条件を調整して
いた。[Prior Art] In the blowing process in an injection blow molding machine, defective molded products often occur due to, for example, insufficient blowing of the molded product, bursts, shot shots, and mis-blows. Conventionally, such determination of the quality of a molded product has been performed manually by periodically collecting molded product samples, and the following molding conditions have been adjusted depending on the condition of the molded product sample.
［発明が解決しようとする課題］
このように、従来の射出吹き込み成形機の吹き込み工程
における成形品の良否判定の際には、成形工程を中断し
て成形品サンプルを採取しなければならず、作業能率性
の低下を生じるという欠点があった。[Problems to be Solved by the Invention] As described above, when determining the quality of a molded product in the blowing process of a conventional injection blow molding machine, it is necessary to interrupt the molding process and take a sample of the molded product. This had the disadvantage of causing a decrease in work efficiency.
本発明の課題は、上記欠点を除去し、成形工程を中断す
ることなく、成形品の良否判定を行うことができ、した
がって射出吹き込み成形機の作業能率性を向上させるこ
とができる射出吹き込み成形機における成形品の良否判
定装置を提供することにある。An object of the present invention is to eliminate the above-mentioned drawbacks and to make an injection blow molding machine capable of determining the quality of a molded product without interrupting the molding process, thereby improving the working efficiency of the injection blow molding machine. An object of the present invention is to provide a device for determining the quality of molded products.
本発明の他の課題は、成形品の良否判定を高信頼性にて
行うことができる射出吹き込み成形機における成形品の
良否判定装置を提供することにある。Another object of the present invention is to provide an apparatus for determining the quality of a molded product in an injection blow molding machine, which is capable of determining the quality of a molded product with high reliability.
〔課題を解決するための手段］
本発明によれば、射出吹き込み成形機の吹き込み金型の
内面に沿って成形される成形品の良、不良を判定する、
射出吹き込み成形機における成形品の良否判定装置おい
て、
前記吹き込み金型の所定部に、該吹き込み金型の外面か
ら前記内面に貫かれた***を設けると共に、
該***に連結され、該***への流体の注入を行うと共に
、該流体の注入の前および後における前記***内の圧力
の変化が基準値より小のとき、前記成形品と前記吹き込
み金型の前記内面との間１３隙間が無しと判定し、前記
変化が前記基準値より大のとき、前記隙間が有りと判定
する・判定部を設け、
前記成形品の不良、良を、それぞれ、前記隙間の有、無
により判定することを特徴とする射出吹き込み成形機に
おける成形品の良否判定装置が得られる。[Means for Solving the Problems] According to the present invention, it is possible to determine whether a molded product molded along the inner surface of a blow mold of an injection blow molding machine is good or bad.
In an apparatus for determining the quality of a molded product in an injection blow molding machine, a small hole is provided in a predetermined part of the blow mold, penetrating from the outer surface of the blow mold to the inner surface, and the small hole is connected to the small hole. When the fluid is injected and the change in pressure in the small hole before and after the fluid injection is smaller than a reference value, there is no gap between the molded product and the inner surface of the blow mold. and when the change is greater than the reference value, it is determined that the gap is present. A determination unit is provided, and the molded product is determined to be defective or good based on the presence or absence of the gap, respectively. A device for determining the quality of a molded product in an injection blow molding machine with features is obtained.
さらに、本発明によれば、射出吹き込み成形機の吹き込
み金型の内面に沿って成形される成形品の良、不良を判
定する、射出吹き込み成形機における成形品の良否判定
装置おいて、
前記吹き込み金型の所定部に、該吹き込み金型の外面か
ら前記内面に貫かれた***を設けると共に、
該***に連結され、該***からの排気を所定排気速度で
所定時間行うと共に、該排気の前および後における前記
***内の圧力の変化が基準値より大のとき、前記成形品
と前記吹き込み金型の前記内面との間に隙間が無しと判
定し、前記変化が前記基準値より小のとき、前記隙間が
有りと判定する判定部を設け、
前記成形品の不良、良を、それぞれ、前記隙間の有、無
により判定することを特徴とする射出吹き込み成形機に
おける成形品の良否判定装置が得られる。Furthermore, according to the present invention, in the apparatus for determining the quality of a molded product in an injection blow molding machine, which determines whether a molded product molded along the inner surface of a blow mold of an injection blow molding machine is good or bad, the blow molding machine includes the following steps: A small hole is provided in a predetermined part of the mold, which penetrates from the outer surface of the blowing mold to the inner surface of the blow mold, and is connected to the small hole, and exhaust from the small hole is performed at a predetermined exhaust speed for a predetermined time, and before the exhaust is and when the change in the pressure inside the small hole after that is greater than the reference value, it is determined that there is no gap between the molded product and the inner surface of the blow mold, and when the change is smaller than the reference value , a determination unit for determining whether the gap exists, and determining whether the molded product is defective or good based on the presence or absence of the gap, respectively. can get.
［実施例］ 次に本発明について図面を参照して説明する。[Example] Next, the present invention will be explained with reference to the drawings.
第１図は、本発明の一実施例による成形品の良否判定装
置を備えた射出吹き込み成形機の概略構成を示す図であ
る。FIG. 1 is a diagram showing a schematic configuration of an injection blow molding machine equipped with a molded product quality determination device according to an embodiment of the present invention.
第１図において、１は射出工程用金型、２は射出工程に
おける成形品であるプリフォーム、３は樹脂を射出工程
用金型１に送る為のスクリューである。 ４はスクリュ
ーの位置を検出するスクリュー位置検出器、５は射出工
程におけるスクリュー前進速度を連続的に検出する射出
速度検出器、６は射出シリンダー ７は実際のスクリュ
ー回転数を検出するスクリュー回転数検出器、８は射出
シリンダー内の作動圧力を検出する圧力検出器である。In FIG. 1, 1 is a mold for the injection process, 2 is a preform which is a molded product in the injection process, and 3 is a screw for feeding resin to the mold 1 for the injection process. 4 is a screw position detector that detects the position of the screw, 5 is an injection speed detector that continuously detects the forward speed of the screw in the injection process, 6 is an injection cylinder, and 7 is a screw rotation speed detector that detects the actual screw rotation speed. 8 is a pressure detector that detects the operating pressure inside the injection cylinder.
９は６Ｊ １ｆｌｊ化工程においてスクリュー背圧を制
御し、射出工程に入ると射出速度を制御し、そして保圧
工程においては作動圧力を制御するサーボ弁、１０はス
クリュー回転数を制御するサーボ弁、１１は射出速度調
節器、１２は保圧調節器、１３はスクリュー背圧調節器
、１４はスクリュー回転数調節器である。調節器１１〜
１４の各々では、設定された値と検出された実際値が比
較され、両者の間に差があればその信号がサーボ弁９や
１０に伝えられ、両者が一致するまで修正がおこなわれ
るｂ
１５はスクリュー位置検出器４から信号を受け、射出速
度調節器１１、保圧調節器１２、スクリュー背圧調節器
１３、およびスクリュー回転数調節器１４に対し、設定
値を出力するプログラム設定器である。9 is a servo valve that controls the screw back pressure in the 6J 1flj conversion process, controls the injection speed in the injection process, and controls the operating pressure in the pressure holding process; 10 is a servo valve that controls the screw rotation speed; 11 is an injection speed regulator, 12 is a holding pressure regulator, 13 is a screw back pressure regulator, and 14 is a screw rotation speed regulator. Adjuster 11~
In each step 14, the set value and the detected actual value are compared, and if there is a difference between the two, that signal is transmitted to the servo valves 9 and 10, and corrections are made until the two match.b15 is a program setting device that receives a signal from the screw position detector 4 and outputs set values to the injection speed regulator 11, holding pressure regulator 12, screw back pressure regulator 13, and screw rotation speed regulator 14. .
１６は吹き込み工程用金型（以下、吹き込み金型と呼ぶ
。）、１７は吹き込み工程によって吹き込み金型１６の
内面に沿って成形される成形品である。１８は吹き込み
工程におけるブロー不足時等に、成形品１７と吹き込み
金型１６の内面との間に発生する隙間である。16 is a mold for the blowing process (hereinafter referred to as a blowing mold), and 17 is a molded article that is molded along the inner surface of the blowing mold 16 in the blowing process. Reference numeral 18 denotes a gap that occurs between the molded product 17 and the inner surface of the blowing mold 16 when there is insufficient blowing in the blowing process.
すなわち、この隙間１８は、射出工程にて成形されたプ
リフォーム２を、吹き込み工程において、成形品１７と
して成形する際に、ブロー不足等によって成形品１７が
吹き込み金型１６の内面まで完全に膨らまない時に発生
する。That is, this gap 18 is formed when the preform 2 molded in the injection process is molded into the molded product 17 in the blowing process, when the molded product 17 is completely inflated to the inner surface of the blow mold 16 due to insufficient blowing or the like. Occurs when there is no
本発明の一実施例による成形品の良否判定装置は、成形
品１７の不良、良を、それぞれ、隙間１８の有、無によ
り判定するものである。本実施例では、予め、吹き込み
金型１６の所定部（例えば、ブロー不足等を生じ易い吹
き込み金型１６の一部）に、吹き込み金型１６の外面か
ら内面に貫かれた***１９（***１９の径は、吹き込み
工程に支障がない程度に小さく選ばれる。）を設けると
共に、***１９に連結された判定部２０を設けたもので
ある。判定部２０は、***１９への空気（その他の気体
や液体であっても良い。）の注入を行うと共に、該空気
の注入の前および後における***１つ内の圧力の変化が
基準値より小のとき、隙間１８が無しと判定し、前記基
準値より大のとき、隙間１８が何りと判定する。The apparatus for determining the quality of a molded product according to an embodiment of the present invention determines whether a molded product 17 is defective or good based on the presence or absence of a gap 18, respectively. In this embodiment, a small hole 19 (small hole 19 The diameter of the hole is selected to be small enough not to interfere with the blowing process.), and a determining section 20 connected to the small hole 19 is provided. The determination unit 20 injects air (or other gas or liquid may be used) into the small hole 19, and determines whether the change in pressure within one small hole before and after the air injection is from a reference value. When it is small, it is determined that there is no gap 18, and when it is larger than the reference value, it is determined that there is no gap 18.
詳細には、この判定部２０は、吹き込み工程終了後の成
形品１７の良否判定時に、一定圧力（大気圧より高圧）
の一定量の空気を吐出することができる、減圧弁等を含
む空気供給部２１と、吹き込み工程終了後の成形品１７
の良否判定時に、空気供給部２１の吐出空気を***１９
に与える、切替え弁等を含む開閉器２２と、空気供給部
２１と開閉器２２との連絡路における空気の圧力を検出
する圧力検出器２３とを含んでいる。Specifically, this determination unit 20 uses a constant pressure (higher pressure than atmospheric pressure) when determining the quality of the molded product 17 after the blowing process.
An air supply unit 21 that can discharge a certain amount of air and includes a pressure reducing valve, etc., and a molded product 17 after the blowing process is completed.
When determining the quality of the air, the air discharged from the air supply section 21 is
The switch 22 includes a switching valve and the like, and a pressure detector 23 that detects the pressure of air in a communication path between the air supply section 21 and the switch 22.
開閉器２２は、通常は、図示の通り空気供給部２１と小
穴１９との連絡路を遮断しており、このとき***１つは
開閉器２２によって密閉されている。このときの、***
１９内の圧力は、大気圧である。さらに、開閉器２２は
、通常は、空気供給部２１の吐出側を遮断している。吹
き込み工程終了後の成形品１７の良否判定時には、開閉
器２２は、空気供給部２１と***１つとを連絡し、それ
によって、空気供給部２１から空気が***１つに注入さ
れる。この際、***１９内の圧力の変化は、隙間１８が
有る場合の方が、隙間１８が無い場合よりも大きい。As shown in the figure, the switch 22 normally blocks the communication path between the air supply section 21 and the small hole 19, and at this time, one small hole is sealed by the switch 22. At this time, the pressure inside the small hole 19 is atmospheric pressure. Furthermore, the switch 22 normally shuts off the discharge side of the air supply section 21. When determining the quality of the molded product 17 after the blowing process is completed, the switch 22 connects the air supply section 21 and one small hole, whereby air is injected from the air supply section 21 into one small hole. At this time, the change in pressure inside the small hole 19 is larger when the gap 18 is present than when there is no gap 18.
空気供給部２１から***１９への空気の注入後における
***１９内の圧力は、圧力検出器２３によって知ること
ができる。また、上述したように、***１９への空気の
注入前における***１９内の圧力は、大気圧である。そ
れ故、判定部２０は、空気の注入前および注入後におけ
る***１９内の圧力の変化を知ることができ、したがっ
て、このような圧力の変化が基準値より小のとき、隙間
１８が無しと判定し、前記基準値より大のとき、隙間１
８が有りと判定することができる。The pressure inside the small hole 19 after air is injected into the small hole 19 from the air supply section 21 can be detected by the pressure detector 23. Further, as described above, the pressure inside the small hole 19 before air is injected into the small hole 19 is atmospheric pressure. Therefore, the determination unit 20 can know the change in pressure inside the small hole 19 before and after air injection, and therefore, when such pressure change is smaller than the reference value, it is determined that there is no gap 18. If the value is larger than the reference value, the gap 1 is determined.
8 can be determined to be present.
なお、圧力検出器２３の代わりに、空気供給部２１の吐
出空気の流量を検出する流量検出器を設け、該吐出空気
の***１つへの注入の前および後における***１９内の
圧力の変化の大小を、吐出空気の流量によって検出して
もよい。吐出空気の流量は、隙間１８が有る場合の方が
、隙間１８が無い場合よりも大きい。それ故、判定部２
０は、このような吐出空気の流量が基準値より小のとき
、隙間１８無しと判定し、前記基準値より大のとき、隙
間１８有りと判定する。Note that, instead of the pressure detector 23, a flow rate detector is provided to detect the flow rate of the discharged air from the air supply section 21, and the change in the pressure in the small hole 19 before and after the discharged air is injected into one small hole. The magnitude may be detected by the flow rate of discharged air. The flow rate of discharged air is larger when there is a gap 18 than when there is no gap 18. Therefore, determination section 2
0, when the flow rate of discharged air is smaller than the reference value, it is determined that there is no gap 18, and when it is larger than the reference value, it is determined that there is a gap 18.
また、空気供給部２１の代わりに、所定の排気速度で所
定の時間だけ動作する真空吸引装置を設けて、隙間１８
の有無を負圧の変化で判定してもよい。この場合、判定
部２０は、前記真空吸引装置によって、***１９からの
空気の排気を行い、該排気の前および後における***１
９内の圧力の変化が基準値より大のとき、隙間１８が無
しと判定し、前記基準値より小のとき、隙間１８が有り
と判定する。In addition, instead of the air supply section 21, a vacuum suction device that operates at a predetermined exhaust speed for a predetermined time is provided, and the gap 18 is
The presence or absence of this may be determined based on changes in negative pressure. In this case, the determination unit 20 exhausts air from the small hole 19 using the vacuum suction device, and
When the change in the pressure within 9 is greater than a reference value, it is determined that there is no gap 18, and when it is smaller than the reference value, it is determined that there is a gap 18.
判定部２０の判定結果を判定出力信号として出力すれば
、この判定出力信号にもとずいて成形品を良品側と不良
品側に自動的に切替えことも可能となり、無人化運転も
可能となる。If the determination result of the determination unit 20 is output as a determination output signal, it becomes possible to automatically switch the molded product between a good product and a defective product based on this determination output signal, and unmanned operation is also possible. .
［発明の効果コ
以上説明したように、本発明による射出吹き込み成形機
における良否判定装置を用いれば、成形工程を中断する
ことなく、成形品の良否判定を行うことができ、したが
って射出吹き込み成形機の作業能率性を向上させること
ができる。さらに、成形品の良否判定を高信頼性にて行
うことができる。[Effects of the Invention] As explained above, by using the quality determination device for an injection blow molding machine according to the present invention, it is possible to determine the quality of a molded product without interrupting the molding process, and therefore the injection blow molding machine can improve work efficiency. Furthermore, it is possible to determine the quality of molded products with high reliability.
第１図は、本発明の一実施例による成形品の良否判定装
置を備えた射出吹き込み成形機の概略構成を示す図であ
る。
図において
１・・・射出工程用金型、２・・・プリフォーム、３・
・・スクリュー １６・・・吹き込み工程用金型（吹き
込み金型）、１７・・・成形品、１８・・・隙間、１９
・・・***、２０・・・判定部、２１・・・空気供給部
、２２・・・開閉器、２３・・・圧力検出器。FIG. 1 is a diagram showing a schematic configuration of an injection blow molding machine equipped with a molded product quality determination device according to an embodiment of the present invention. In the figure, 1...Mold for injection process, 2...Preform, 3...
...Screw 16...Mold for blowing process (blow mold), 17...Molded product, 18...Gap, 19
... Small hole, 20 ... Judgment section, 21 ... Air supply section, 22 ... Switch, 23 ... Pressure detector.
Claims (1)
成形される成形品の良、不良を判定する、射出吹き込み
成形機における成形品の良否判定装置おいて、 前記吹き込み金型の所定部に、該吹き込み金型の外面か
ら前記内面に貫かれた***を設けると共に、 該***に連結され、該***への流体の注入を行うと共に
、該流体の注入の前および後における前記***内の圧力
の変化が基準値より小のとき、前記成形品と前記吹き込
み金型の前記内面との間に隙間が無しと判定し、前記変
化が前記基準値より大のとき、前記隙間が有りと判定す
る判定部を設け、 前記成形品の不良、良を、それぞれ、前記隙間の有、無
により判定することを特徴とする射出吹き込み成形機に
おける成形品の良否判定装置。 ２、射出吹き込み成形機の吹き込み金型の内面に沿って
成形される成形品の良、不良を判定する、射出吹き込み
成形機における成形品の良否判定装置おいて、 前記吹き込み金型の所定部に、該吹き込み金型の外面か
ら前記内面に貫かれた***を設けると共に、 該***に連結され、該***からの排気を所定排気速度で
所定時間行うと共に、該排気の前および後における前記
***内の圧力の変化が基準値より大のとき、前記成形品
と前記吹き込み金型の前記内面との間に隙間が無しと判
定し、前記変化が前記基準値より小のとき、前記隙間が
有りと判定する判定部を設け、 前記成形品の不良、良を、それぞれ、前記隙間の有、無
により判定することを特徴とする射出吹き込み成形機に
おける成形品の良否判定装置。[Claims] 1. A device for determining the quality of a molded product in an injection blow molding machine, which determines whether a molded product molded along the inner surface of a blow mold of the injection blow molding machine is good or bad, comprising: A small hole is provided in a predetermined part of the mold, penetrating from the outer surface to the inner surface of the blowing mold, and the method is connected to the small hole to inject a fluid into the small hole, and to perform injection of a fluid before and after the injection of the fluid. When the change in the pressure in the small hole is smaller than the reference value, it is determined that there is no gap between the molded product and the inner surface of the blow mold, and when the change is larger than the reference value, it is determined that there is no gap between the molded product and the inner surface of the blow mold. A device for determining the quality of a molded product in an injection blow molding machine, comprising: a determining section that determines whether a gap exists; and determining whether the molded product is defective or good based on the presence or absence of the gap, respectively. 2. In a device for determining the quality of a molded product in an injection blow molding machine, which determines whether a molded product molded along the inner surface of a blow mold of an injection blow molding machine is good or bad, a predetermined part of the blow mold is , a small hole penetrating from the outer surface of the blowing mold to the inner surface is provided, the small hole is connected to the small hole, and the air is evacuated from the small hole at a predetermined exhaust speed for a predetermined time, and the air inside the small hole before and after the evacuation is When the change in pressure is larger than a reference value, it is determined that there is no gap between the molded product and the inner surface of the blow mold, and when the change is smaller than the reference value, it is determined that there is a gap. A device for determining the quality of a molded product in an injection blow molding machine, comprising: a determination section that determines whether the molded product is defective or good, respectively, based on the presence or absence of the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63283965A JPH02130122A (en) | 1988-11-11 | 1988-11-11 | Apparatus for judging quality of molded product in injection blow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63283965A JPH02130122A (en) | 1988-11-11 | 1988-11-11 | Apparatus for judging quality of molded product in injection blow molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02130122A true JPH02130122A (en) | 1990-05-18 |
Family
ID=17672521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63283965A Pending JPH02130122A (en) | 1988-11-11 | 1988-11-11 | Apparatus for judging quality of molded product in injection blow molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02130122A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020152045A (en) * | 2019-03-22 | 2020-09-24 | キョーラク株式会社 | Molding system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128518A (en) * | 1981-02-04 | 1982-08-10 | Sumitomo Heavy Ind Ltd | Detector for mis-blow in injection blow molding machine |
-
1988
- 1988-11-11 JP JP63283965A patent/JPH02130122A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128518A (en) * | 1981-02-04 | 1982-08-10 | Sumitomo Heavy Ind Ltd | Detector for mis-blow in injection blow molding machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020152045A (en) * | 2019-03-22 | 2020-09-24 | キョーラク株式会社 | Molding system |
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