JPS6121128B2 - - Google Patents
Info
- Publication number
- JPS6121128B2 JPS6121128B2 JP56014404A JP1440481A JPS6121128B2 JP S6121128 B2 JPS6121128 B2 JP S6121128B2 JP 56014404 A JP56014404 A JP 56014404A JP 1440481 A JP1440481 A JP 1440481A JP S6121128 B2 JPS6121128 B2 JP S6121128B2
- Authority
- JP
- Japan
- Prior art keywords
- blow
- pressure
- mold
- pressure air
- air
- 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
Links
- 238000010102 injection blow moulding Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 230000005856 abnormality Effects 0.000 description 7
- 238000000071 blow moulding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008054 signal transmission 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/80—Testing, e.g. for leaks
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は射出吹込成形機におけるミスブロー検
出装置の改良に関するものである。詳しく言えば
射出吹込成形後においては、射出成形された有底
パリソンを吹込金型部に移行して吹込成形する
が、その際発生する吹破れ域は吹込成形ができな
い場合等の異常を検出し機械の作動を停止させ、
金型間に残存するプラスチツク原料の固化物を金
型間に高圧ではさみこむことによる金型破損を未
然に防ぐためのものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a misblow detection device in an injection blow molding machine. Specifically, after injection blow molding, the injection molded bottomed parison is moved to the blow mold section and blow molded, but the blow-out area that occurs at this time is used to detect abnormalities such as when blow molding cannot be performed. stop the operation of the machine,
This is to prevent damage to the molds caused by sandwiching the solidified plastic material remaining between the molds under high pressure.
射出吹込成形機のミスブロー検出方法について
１、２の方法が提案されているがいずれの方法に
於ても実用上の問題がある。 One or two methods have been proposed for detecting misblows in injection blow molding machines, but each method has practical problems.
１つの方法は、吹込底型に真空ポンプにより発
生する真空回路に通じる通路を作り、吹込成形品
が吹込底型内通路を閉鎖すると、真空回路内の真
空度が高まつてマイクロスイツチが作動し、一方
何らかの原因により吹込成形品が完成されないと
真空ポンプに通じる回路は大気圧に通じるため真
空度が低下し、マイクロスイツチが復帰する。し
かし通常状態に於てはミスブロー発生頻度は少な
く、正常成形されることが多いのでこの作動方式
ではマイクロスイツチの作動頻度が多くなり、現
有のマイクロスイツチ寿命では定期交換を早めに
行う必要があり実用上は問題がある（実開昭54−
178777参照）。 One method is to create a passage in the blow-bottom mold that leads to a vacuum circuit generated by a vacuum pump, and when the blow-molded product closes the passage inside the blow-bottom mold, the degree of vacuum in the vacuum circuit increases and a micro switch is activated. On the other hand, if the blow molded product is not completed for some reason, the circuit leading to the vacuum pump is connected to atmospheric pressure, so the degree of vacuum decreases and the micro switch returns to normal. However, under normal conditions, the frequency of mis-blows is low and normal molding is often achieved, so with this operating system, the microswitch operates more frequently, and the current microswitch lifespan requires early periodic replacement, making it impractical. There is a problem with the above (1976-
178777).
他の方法は、吹込底型に空気信号回路に通じる
通路を作り、吹込成形品が吹込成形された後に、
この回路内に設置された圧力検出器で、ミスブロ
ーした場合にその空気圧を検出するシステムにな
つている。然しミスブローの中、有底パリソンの
温度が異常低温の場合はブローアツプしない時も
ありその時の異常は検出できない（特開昭54−
159470参照）。 Another method is to create a passageway in the blow bottom mold that leads to the air signal circuit, and after the blow molded part is blown,
A pressure detector installed in this circuit is a system that detects the air pressure in the event of a mis-blow. However, if the temperature of the bottomed parison is abnormally low during a mis-blow, the blow-up may not occur and the abnormality cannot be detected at that time.
159470).
図示の実施例について説明すれば、１は射出成
形された有底パリソン、２は吹込成形品、３は吹
込割金型、４は吹込底金型、５は圧力空気供給通
路である。７は減圧弁でこれを通じて必要な時期
に電磁切換弁８及び絞り弁９を介して適当な流量
を前記空気信号伝達用通路５に送る。６は吹込割
金型４内に設けられた圧力空気排出通路で、必要
な時期に電磁弁１０を切換えて空気を圧力検出器
１１に導く。 To explain the illustrated embodiment, 1 is an injection molded parison with a bottom, 2 is a blow molded product, 3 is a blow mold, 4 is a blow bottom mold, and 5 is a pressure air supply passage. Reference numeral 7 denotes a pressure reducing valve through which an appropriate flow rate is sent to the air signal transmission passage 5 via an electromagnetic switching valve 8 and a throttle valve 9 at necessary times. Reference numeral 6 denotes a pressure air discharge passage provided in the blowing split mold 4, which guides air to a pressure detector 11 by switching a solenoid valve 10 at a necessary time.
以上の構成であるから、吹込成形容器内に空気
を吹込んで有底パリソン１を空気圧により半溶融
のプラスチツク材料が金型に密着させた後、吹込
成形容器の冷却時間中（この時は通常５〜６Kg/
cm2の空気圧を保持しておく）に、圧力空気供給通
路５を通じて減圧弁７で圧力制御された圧力空気
を電磁切換弁８を作動させて送り込む。 With the above configuration, after air is blown into the blow-molded container and the semi-molten plastic material of the bottomed parison 1 is brought into close contact with the mold by air pressure, during the cooling time of the blow-molded container (usually 5 ~6Kg/
cm 2 of air pressure is maintained), pressurized air whose pressure is controlled by a pressure reducing valve 7 is fed through a pressure air supply passage 5 by operating an electromagnetic switching valve 8.
この時吹込成形品が完全に成形されていれば、
吹込割型３、底部４とのスキマはその吹込圧によ
り密着しているので、圧力空気排出通路６には電
磁切換弁１０を作動させても圧力空気の伝達はな
いので、圧力検出器１１は作動しない（第１図参
照）。尚圧力検出器１１の検出圧力は、減圧弁７
で設定された圧力より多少低い圧力で作動する様
に設定しておく（通常１Kg/cm2、信号圧1.5〜2.0
Kg/cm2）。 If the blow molded product is completely molded at this time,
Since the gap between the blowing split mold 3 and the bottom part 4 is in close contact with each other due to the blowing pressure, no pressure air is transmitted to the pressure air discharge passage 6 even if the electromagnetic switching valve 10 is operated. It does not work (see Figure 1). The pressure detected by the pressure detector 11 is determined by the pressure reducing valve 7.
Set it so that it operates at a pressure slightly lower than the pressure set in (usually 1Kg/cm 2 , signal pressure 1.5 to 2.0
kg/ cm2 ).
もし吹込成形過程中に於て、有底パリソン１の
一部が何らかの要因により破れた時には、そのも
れた空気圧、又は空気信号が吹込成形品２と吹込
割型３、底部４間に生じるスキマにより圧力空気
排出通路６を通じて圧力検出器１１を作動させ、
異常検出を見い出しこの信号により機械を停止さ
せることができる（第２図参照）。 If a part of the bottomed parison 1 is torn for some reason during the blow molding process, the leaked air pressure or air signal will be transmitted to the gap between the blow molded product 2, the blow mold 3, and the bottom 4. activates the pressure detector 11 through the pressure air discharge passage 6,
If an abnormality is detected, the machine can be stopped using this signal (see Figure 2).
又他の１因として有底パリソン１の温度が異常
低下し、吹込成形圧で全然膨らまない場合、もし
くは一部分しか膨らまない場合でも上記と同様圧
力空気が吹込割型３、底型４と不完全吹込成形品
とのスキマより圧力空気排出通路６を通じて圧力
検出器１１を作動させて異常検出が可能である
（図３参照）。即ち異常時のみ検出器１１が作動す
る方式であるからその寿命は長く保つことができ
る。 Another reason is that the temperature of the bottomed parison 1 drops abnormally and the blow molding pressure does not inflate it at all, or if it only partially inflates. Abnormalities can be detected by operating the pressure detector 11 through the pressure air discharge passage 6 through the gap between the blow molded product and the blow molded product (see FIG. 3). In other words, since the detector 11 is activated only when an abnormality occurs, its lifespan can be maintained for a long time.
本発明によれば吹込成形過程中に於て吹込成形
品の全てのミスブロー異常を検出できるので、次
に続くサイクルの停止が可能である。従来のごと
くこの種の異常が生じた際には、金型中に固化し
たプラスチツク原料が残存し、次に続くサイクル
中で型閉状態で挾み込みこれをリミツトスイツチ
で検出する方法では、非常にわずかのスキマの調
整することの困難さ、或いははさみこんでからそ
のスキマを検出するのではさみ込む力により金型
を損傷することなどが多々あつたが、本発明によ
りこのようなトラブルが防がれ、経済的損失を減
少でき、機械の信頼性をアツプすることが可能と
なつた。 According to the present invention, all mis-blow abnormalities of the blow-molded product can be detected during the blow-molding process, so that it is possible to stop the next cycle. When this type of abnormality occurs, as in the conventional method, the solidified plastic material remains in the mold, and the mold is clamped in the closed state during the next cycle and detected with a limit switch. There were many cases where it was difficult to adjust the slight gap, or when the gap was detected after the mold was inserted, the mold was damaged due to the force of the sandwich, but the present invention prevents such troubles. It has become possible to reduce economic losses and improve machine reliability.
又吹込成形品を落下させる際、吹込割型の左右
の速度差、抵抗差を生じても吹込割型左右からの
圧力空気により中央に保持されるので落下も安定
する。 Furthermore, when a blow-molded product is dropped, even if there is a speed difference or a difference in resistance between the left and right sides of the blow mold, it is held in the center by the pressurized air from the left and right sides of the blow mold, making it stable to fall.
なお以上の説明において、射出吹込成形機につ
いての実施例を説明したが、吹込成形機にも応用
することも勿論可能である。 In the above description, an example of an injection blow molding machine has been described, but it is of course possible to apply the present invention to a blow molding machine as well.
第１図は射出吹込成形機における成形品が正常
の場合を示す。第２図は同じく有底パリソンの一
部分が破れた場合を示す。第３図は同じく有底パ
リソンが全く膨れない場合もしくは一部分のみ膨
れる場合を示す。
図において；１……有底パリソン、２……吹込
成形品、３……吹込割金型、４……吹込底金型、
５……圧力空気供給通路、６……圧力空気排出通
路、７……減圧弁、８……電磁切換弁、９……絞
り弁、１０……電磁切換弁、１１……圧力検出
器。
FIG. 1 shows a case where the molded product in the injection blow molding machine is normal. FIG. 2 also shows a case where a portion of the bottomed parison is torn. FIG. 3 similarly shows a case where the bottomed parison does not swell at all or only partially swells. In the figure: 1...bottomed parison, 2...blow molded product, 3...blow split mold, 4...blow bottom mold,
5... Pressure air supply passage, 6... Pressure air discharge passage, 7... Pressure reducing valve, 8... Solenoid switching valve, 9... Throttle valve, 10... Solenoid switching valve, 11... Pressure detector.
Claims (1)
供給通路を吹込割型に設け、又圧力空気排出通路
を吹込底型に設け、かつ前記圧力空気供給通路よ
り供給した圧力空気を前記圧力空気排出通路から
排出すると共に、圧力空気排出通路中に設けた圧
力検出器により排出・空気圧を検出するようにし
たことを特徴とする射出吹込成形機におけるミス
ブロー検出装置。1. In an injection blow molding machine, a pressure air supply passage is provided in the mold in the blowing split mold, and a pressure air discharge passage is provided in the blow bottom mold, and the pressure air supplied from the pressure air supply passage is discharged from the pressure air discharge mold. A misblow detection device for an injection blow molding machine, characterized in that the air is discharged from a pressure air passage, and the discharge and air pressure are detected by a pressure detector provided in the pressure air discharge passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56014404A JPS57128518A (en) | 1981-02-04 | 1981-02-04 | Detector for mis-blow in injection blow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56014404A JPS57128518A (en) | 1981-02-04 | 1981-02-04 | Detector for mis-blow in injection blow molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57128518A JPS57128518A (en) | 1982-08-10 |
| JPS6121128B2 true JPS6121128B2 (en) | 1986-05-26 |
Family
ID=11860103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56014404A Granted JPS57128518A (en) | 1981-02-04 | 1981-02-04 | Detector for mis-blow in injection blow molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57128518A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02130122A (en) * | 1988-11-11 | 1990-05-18 | Sumitomo Heavy Ind Ltd | Apparatus for judging quality of molded product in injection blow molding machine |
| DE8913346U1 (en) * | 1989-11-11 | 1990-03-29 | Förster, Wolfgang, 2000 Hamburg | Control device on a plastic injection blow molding machine |
| DE102004061230B4 (en) * | 2004-12-16 | 2011-09-29 | Krones Ag | Blowing machine and blowing process |
| DE102011016688B4 (en) * | 2011-04-11 | 2015-03-19 | Rehau Ag + Co. | Method for detecting defects in blow molded parts |
| DE102014116806A1 (en) * | 2014-11-17 | 2016-05-19 | Krones Ag | Pressure control device |
| FR3050680B1 (en) * | 2016-04-28 | 2018-04-27 | Sidel Participations | METHOD FOR FORMING MULTI-WALL CONTAINERS |
| JP6949263B1 (en) * | 2021-03-26 | 2021-10-13 | 住友重機械工業株式会社 | Injection blow molding machine and method for detecting molding defects |
| CN117656430B (en) * | 2023-12-25 | 2024-06-14 | 佛山市合研精密模具科技有限公司 | Quick replacement equipment for mould of bottle blowing machine |
-
1981
- 1981-02-04 JP JP56014404A patent/JPS57128518A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57128518A (en) | 1982-08-10 |
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