JPH0453697B2 - - Google Patents
Info
- Publication number
- JPH0453697B2 JPH0453697B2 JP61281146A JP28114686A JPH0453697B2 JP H0453697 B2 JPH0453697 B2 JP H0453697B2 JP 61281146 A JP61281146 A JP 61281146A JP 28114686 A JP28114686 A JP 28114686A JP H0453697 B2 JPH0453697 B2 JP H0453697B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- parison
- pressurized fluid
- mold
- blow molding
- 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
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
- B29C49/58—Blowing means
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- 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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ブロー成形機の制御方法に関し、詳
しくは、閉じた金型内のパリソンへの吹き込みノ
ズルの打ち込みに際し、この打ち込みと前後して
吹き込みノズルから吐出される加圧流体の圧力を
制御することによつて、打ち込みまでに吹き込み
ノズルから大気中に放出される加圧流体によつて
生じる騒音を低減し得ると共に、加圧流体を効率
的に利用し得るようにしたブロー成形機の制御方
法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control method for a blow molding machine, and more specifically, when a blow nozzle is driven into a parison in a closed mold, control is performed before and after the drive. By controlling the pressure of the pressurized fluid discharged from the blow nozzle, it is possible to reduce the noise caused by the pressurized fluid discharged from the blow nozzle into the atmosphere before driving, and to improve the efficiency of the pressurized fluid. The present invention relates to a method for controlling a blow molding machine that can be used for commercial purposes.
ブロー成形機の制御方法に関する従来の技術と
しては、特開昭59−176024号公報、特開昭60−
64824号公報に記載のもの等が知られている。
Conventional techniques related to control methods for blow molding machines include JP-A-59-176024 and JP-A-60.
The one described in Publication No. 64824 is known.
上記公報の記載について略述すると、特開昭59
−176024号公報には、ブロー成形機の型締力制御
方法が記載されている。即ち、金型がパリソンに
接触するまでの間の型締力が比較的小さい第１段
階、パリソンの端部を金型によつて食い切るため
に必要な型締力を与える第２段階、及びパリソン
内に吹き込まれる気体の圧力に対抗する型締力を
作用する第３段階の３つの段階に分けて型締力を
制御することが記載されている。 To briefly explain the description in the above publication, JP-A-59
Publication No. 176024 describes a method for controlling mold clamping force of a blow molding machine. That is, a first stage in which the mold clamping force is relatively small until the mold comes into contact with the parison, a second stage in which the mold clamping force necessary to cut off the end of the parison by the mold is applied, and It is described that the mold clamping force is controlled in three stages, including a third stage in which a mold clamping force is applied to counteract the pressure of the gas blown into the parison.
また、特開昭60−64824号公報には、パリソン
の形成中、空気をパリソン内に吹き込むことによ
つて、パリソンを金型外で膨張させた後、金型を
閉じ、パリソンに十分な圧力を吹き込むことによ
つて複雑な形状の容器を成形することが記載され
ており、この場合において、パリソンを金型外で
膨張させる時には低圧空気（例えば0.6バール）
が、又金型内で膨張させる時には高圧空気（例え
ば７バール）が吹き込まれることが記載されてい
る。 Furthermore, Japanese Patent Application Laid-Open No. 60-64824 discloses that during the formation of the parison, the parison is expanded outside the mold by blowing air into the parison, and then the mold is closed and sufficient pressure is applied to the parison. It has been described that containers of complex shapes can be molded by blowing with low pressure air (e.g. 0.6 bar) when inflating the parison outside the mold.
However, it is also stated that high pressure air (for example 7 bar) is blown during expansion in the mold.
しかしながら、特開昭59−176024号公報には、
型締力を制御することによつて消費エネルギーを
節減することは記載されているが、閉じた金型内
のパリソンに吹き込みノズルを打ち込むに際し、
この打ち込みと前後して吹き込みノズルから吐出
される加圧流体の圧力を制御することについては
何らの記載も示唆もない。
However, in Japanese Patent Application Laid-open No. 59-176024,
It has been described that energy consumption can be reduced by controlling mold clamping force, but when driving a blow nozzle into a parison inside a closed mold,
There is no description or suggestion of controlling the pressure of the pressurized fluid discharged from the blow nozzle before or after this injection.
また、特開昭60−64824号公報には、パリソン
を金型内で膨張させることは記載されているが、
閉じた金型内のパリソンに吹き込みノズルを打ち
込むに際し、この打ち込みと前後して吹き込みノ
ズルから吐出される加圧流体の圧力を制御するこ
とについては何らの記載も示唆もない。 Furthermore, JP-A No. 60-64824 describes that the parison is expanded in a mold, but
There is no description or suggestion of controlling the pressure of the pressurized fluid discharged from the blow nozzle before and after driving the blow nozzle into the parison in the closed mold.
何れにせよ、上記両公報には、閉じた金型内の
パリソンに吹き込みノズルを打ち込むに際し、こ
の打ち込みと前後して吹き込みノズルから吐出さ
れる加圧流体の圧力を制御することについては何
らの記載も示唆もなく、従つて、これらの公報に
記載の技術においても、従来の通常のブロー成形
機と同様に、吹き込みノズルから吐出される加圧
流体の圧力は、閉じた金型内のパリソンに吹き込
みノズルが打ち込まれる前においても、キヤビテ
イの表面へのパリソン圧着に要するような高圧で
あると推察されるが、このように打ち込み前にお
いても、加圧流体の圧力を高圧にしておくこと
は、吹き込みノズルから大気中に放出される高圧
の加圧流体によつて激しい騒音を生じさせると共
に、加圧流体を効率的に利用できない等の問題点
がある。 In any case, in both of the above publications, there is no mention of controlling the pressure of the pressurized fluid discharged from the blow nozzle before and after driving the blow nozzle into the parison in a closed mold. Therefore, in the techniques described in these publications, as in the conventional blow molding machine, the pressure of the pressurized fluid discharged from the blow nozzle is applied to the parison in the closed mold. Even before the blow nozzle is driven in, it is assumed that the pressure is high enough to press the parison onto the surface of the cavity. The high-pressure pressurized fluid discharged into the atmosphere from the blowing nozzle causes severe noise, and there are other problems such as the inability to use the pressurized fluid efficiently.
従つて、本発明の目的は、閉じた金型内のパリ
ソンへの吹き込みノズルの打ち込みに際し、この
打ち込みと前後して吹き込みノズルから吐出され
る加圧流体の圧力を制御することによつて、打ち
込み前に吹き込みノズルから大気中に放出される
加圧流体によつて生じる騒音を低減し得ると共
に、加圧流体を効率的に利用し得るようにしたブ
ロー成形機の制御方法を提供することにある。 Therefore, an object of the present invention is to control the pressure of the pressurized fluid discharged from the blow nozzle before and after the injection of the blow nozzle into a parison in a closed mold, thereby improving the injection. An object of the present invention is to provide a control method for a blow molding machine that can reduce the noise caused by pressurized fluid that is previously discharged into the atmosphere from a blow nozzle, and that can efficiently utilize the pressurized fluid. .
本発明は、パリソンを金型内に保持し、吹き込
みノズルを介して上記パリソンの内部に加圧流体
を吹き込んで中空品を成形するブロー成形機の制
御方法において、上記吹き込みノズルが上記加圧
流体を吐出しながら上記パリソンに打ち込まれ、
上記パリソンをキヤビティの表面に圧着するのに
必要な圧力まで上記加圧流体の圧力を昇圧し、こ
の後、該加圧流体を、上記パリソンが上記キヤビ
テイの表面に圧着された状態を保持するのに必要
な圧力まで減圧することを特徴とするブロー成形
機の制御方法を提供することによつて上記の目的
を達成したものである。
The present invention provides a control method for a blow molding machine that holds a parison in a mold and blows pressurized fluid into the inside of the parison through a blowing nozzle to mold a hollow product, in which the blowing nozzle is driven into the above parison while discharging
The pressure of the pressurized fluid is increased to the pressure necessary to press the parison to the surface of the cavity, and the pressurized fluid is then maintained in a state in which the parison is pressed against the surface of the cavity. The above object has been achieved by providing a method for controlling a blow molding machine, which is characterized in that the pressure is reduced to the pressure required for the process.
以下、本発明のブロー成形機の制御方法の一実
施態様を、図面を参照しながら説明する。
Hereinafter, one embodiment of the method for controlling a blow molding machine of the present invention will be described with reference to the drawings.
第１図〜第６図は、本発明の方法の一実施態様
を適用したブロー成形方法による中空品の連続的
な成形工程を工程順に示す斜視図で、第６図に示
す如き中空品７を成形するには、先ず、第１図に
示す如く、押出機１から成形材料がチユーブ状に
押し出されパリソン２が形成される。パリソン２
が一定の長さに達したことを光電スイツチ３で検
出すると、第２図に示す如く、金型４はパリソン
２を挟む位置まで移動（斜めに上昇）する。次い
で、第３図に示す如く、金型４がパリソン２を挟
み、ホツトカツタ５がパリソン２を切断する。切
断されたパリソン２を挟んだ金型４は、第４図に
示す如く、加圧流体、例えば加圧空気をパリソン
２内に吹き込む位置まで移動（斜めに下降）する
と、第５図に示す如く、吹き込みノズル６が吹き
込み加圧空気を吐出しながら金型４に向かつて下
降して金型４に打ち込まれ、パリソン２が加圧空
気によつてキヤビテイの表面に圧着し、キヤビテ
イの形状に対応した中空品に成形される。中空品
が成形されると、大気中への排気が行われ、その
後、第６図に示す如く、金型４が開き、吹き込み
ノズル６から吐出される加圧空気によつて、中空
品７はコンベヤ８上に整列して排出される。 FIGS. 1 to 6 are perspective views showing the continuous molding process of a hollow product by a blow molding method to which an embodiment of the method of the present invention is applied, in order of process, and a hollow product 7 as shown in FIG. For molding, first, as shown in FIG. 1, a molding material is extruded into a tube shape from an extruder 1 to form a parison 2. parison 2
When the photoelectric switch 3 detects that the parison 2 has reached a certain length, the mold 4 moves (diagonally rises) to a position where it sandwiches the parison 2, as shown in FIG. Next, as shown in FIG. 3, the mold 4 sandwiches the parison 2, and the hot cutter 5 cuts the parison 2. The mold 4 holding the cut parison 2 therebetween is moved (diagonally lowered) to a position where pressurized fluid, for example pressurized air, is blown into the parison 2, as shown in FIG. 4, and as shown in FIG. , the blowing nozzle 6 blows and discharges pressurized air toward the mold 4, descends, and is driven into the mold 4, and the parison 2 is pressed against the surface of the cavity by the pressurized air to correspond to the shape of the cavity. It is molded into a hollow product. When the hollow product is molded, it is evacuated to the atmosphere, and then, as shown in FIG. 6, the mold 4 is opened, and the hollow product 7 is They are arranged and discharged onto the conveyor 8.
而して、本発明の方法においては、上述の如く
吹き込みノズル６が加圧空気を吐出しながらパリ
ソン２に打ち込まれた後、パリソン２をキヤビテ
イの表面に圧着するのに必要な圧力まで加圧流体
を圧力を昇圧している。即ち、第７図のタイムチ
ヤートに示す如く、吹き込みノズル６が下降を開
始してから金型４内に打ち込まれる（吹き込みノ
ズル６はt1で打ち込まれる）直後までのt0〜t2の
間では圧力PL（２〜５Kg／cm2、例えば3.5Kg／cm2）
の加圧空気を使用し、打ち込み直後からはPH（４
〜10Kg／cm2、例えば７Kg／cm2）の加圧空気を使用
して昇圧を行つている。このように吹き込みノズ
ル６から打ち込み前に大気中に放出される加圧空
気の圧力を比較的小さくすることによつて、大気
中への加圧空気の放出に伴う騒音をより低くする
ことができる。 In the method of the present invention, after the blow nozzle 6 is driven into the parison 2 while discharging pressurized air as described above, the pressure is increased to the pressure necessary to press the parison 2 to the surface of the cavity. The pressure of the fluid is increased. That is, as shown in the time chart of FIG. 7, from t 0 to t 2 from when the blow nozzle 6 starts descending until immediately after it is driven into the mold 4 (the blow nozzle 6 is driven at t 1 ). Then the pressure P L (2-5Kg/cm 2 , for example 3.5Kg/cm 2 )
P H (4
The pressure is increased using pressurized air of ~10 Kg/cm 2 , for example 7 Kg/cm 2 . By making the pressure of the pressurized air released into the atmosphere from the blow nozzle 6 before blowing into the atmosphere relatively small, the noise accompanying the release of the pressurized air into the atmosphere can be further reduced. .
また、上述の如く昇圧された加圧空気は、前記
圧力PHでパリソン２内にt2〜t3の間（２〜６秒
間、例えば４秒間）吹き込まれ、この吹き込みに
よつて、中空品７がキヤビテイの表面に沿つて成
形され、冷却される。次いで、排気前に上記加圧
空気の圧力が減圧され、成形された中空品７の形
状を維持したまま冷却工程を実施するのに必要な
前記圧力PLでパリソン２内にt3〜t4の間（３〜10
秒間、例えば5.2秒間）、加圧空気が吹き込まれ、
中空品７が更に冷却される。本発明の方法におい
ては、このように排気前にパリソン２内に吹き込
む加圧空気の減圧を行うことによつて、常に必要
最低限の吹き込み圧力をパリソン２内に作用させ
ることができ、消費エネルギを大幅に節減するこ
とができると共に、大気中に放出される加圧空気
の圧力を小さくできるため、排気に伴う騒音を低
減することができる。 Further, the pressurized air that has been increased in pressure as described above is blown into the parison 2 for a period of t 2 to t 3 (for 2 to 6 seconds, e.g. 4 seconds) at the pressure P H , and by this blowing, the hollow article 7 is molded along the surface of the cavity and cooled. Then, before evacuation, the pressure of the pressurized air is reduced, and the pressure P L necessary to carry out the cooling process while maintaining the shape of the molded hollow article 7 is applied to the parison 2 from t 3 to t 4 . Between (3-10
(e.g. 5.2 seconds), pressurized air is blown into the
The hollow article 7 is further cooled. In the method of the present invention, by reducing the pressure of the pressurized air blown into the parison 2 before evacuation, the minimum necessary blowing pressure can always be applied inside the parison 2, thereby reducing energy consumption. Since the pressure of the pressurized air discharged into the atmosphere can be reduced, the noise accompanying the exhaust gas can be reduced.
また、上述の実施態様においては、第７図に示
す如く、中空品７の排出を行うt6〜t7の間でも前
記圧力PLの加圧空気を使用しているので、大気
中に放出される加圧空気の圧力が比較的小さくな
り、大気中への加圧空気の放出に伴う騒音をより
低くできるようになしてあるが、このt6〜t7の間
では、前記圧力PHの加圧空気を使用することも
できる。 In addition, in the above embodiment, as shown in FIG. 7, pressurized air at the pressure P L is used even between t 6 and t 7 when the hollow article 7 is discharged, so that the air is not discharged into the atmosphere. The pressure of the pressurized air is relatively small, and the noise accompanying the release of the pressurized air into the atmosphere can be lowered. However, between t 6 and t 7 , the pressure P H Pressurized air can also be used.
第８図〜第１０図は、それぞれ本発明のブロー
成形機の制御方法に用いる装置の一例の加圧空気
のフロー図で、第８図は吹き込み停止時、第９図
は圧力PLの加圧空気の吹き込み時、第１０図は
圧力PHの加圧空気の吹き込み時の状態をそれぞ
れ示すものである。これらの図面において、６は
吹き込みノズル、DCV−Ｈ、DCV−Ｌは切換
弁、SVはシヤトル弁、QEVは急速排気弁、PRV
は減圧弁、SOVは電磁弁であり、切換弁DCV−
Ｈ、DCV−Ｌは電磁弁SOVを介して制御される
空気作動弁であり、切換弁DCV−Ｈには圧力PH
の加圧空気が圧力減から供給されており、切換弁
DCV−Ｌには上記圧力源から減圧弁PRVを介し
て減圧して形成された他の圧力源から圧力PLの
加圧空気が供給されている。 Figures 8 to 10 are flow diagrams of pressurized air in an example of the device used in the control method of the blow molding machine of the present invention, with Figure 8 showing when the blowing is stopped and Figure 9 showing the pressure P L being applied. FIG. 10 shows the state when pressurized air of pressure P H is blown. In these drawings, 6 is a blow nozzle, DCV-H, DCV-L are switching valves, SV is a shuttle valve, QEV is a quick exhaust valve, PRV
is a pressure reducing valve, SOV is a solenoid valve, and switching valve DCV−
H, DCV-L are air-operated valves controlled via the solenoid valve SOV, and the switching valve DCV-H has a pressure P H
Pressurized air is supplied from the pressure reducer and the switching valve
DCV-L is supplied with pressurized air at a pressure P L from another pressure source which is formed by reducing the pressure from the above pressure source via a pressure reducing valve PRV .
従つて、圧力PLの加圧空気の吹き込み時には、
第９図に示す如く、切換弁DCV−Ｌが作動し、
シヤトル弁SVを経て圧力PLの加圧空気が吹き込
みノズル６まで供給される。 Therefore, when blowing pressurized air at pressure P L ,
As shown in Figure 9, the switching valve DCV-L operates,
Pressurized air at a pressure P L is supplied to the blow nozzle 6 via the shuttle valve SV.
また、圧力PHの加圧空気の吹き込み時には、
第１０図に示す如く、切換弁DCV−Ｈが作動し、
圧力PHの加圧空気が吹き込みノズル６まで供給
される。 Also, when blowing pressurized air at pressure P H ,
As shown in Fig. 10, the switching valve DCV-H operates,
Pressurized air at a pressure P H is supplied to the blow nozzle 6 .
また、上記の装置は、プログラム可能なタイム
リレー等によつて制御されており、前述の如くの
本発明のブロー成形機の制御方法を好適に実施し
得るように制御されている。 Further, the above-mentioned apparatus is controlled by a programmable time relay or the like, and is controlled so as to suitably implement the blow molding machine control method of the present invention as described above.
以上、本発明のブロー成形機の制御方法の一実
施態様について説明したが、本発明においてパリ
ソンは、加圧流体を吹き込み得るように予備成形
された中空材を意味し、チユーブ状に押し出され
た中空材に限定されるものではない。また、本発
明のブロー成形機の制御方法は、この一実施態様
に限定されるものではなく、例えば、チユーブ状
のパリソンを押し出す代わりに２枚のシートを平
行に押し出し、これを金型で挟むシートブロー法
等の種々の方式に適用されても良い。 An embodiment of the method for controlling a blow molding machine according to the present invention has been described above. In the present invention, a parison refers to a hollow member that is preformed so that pressurized fluid can be blown into it, and is extruded into a tube shape. It is not limited to hollow materials. Furthermore, the method of controlling the blow molding machine of the present invention is not limited to this one embodiment. For example, instead of extruding a tube-shaped parison, two sheets are extruded in parallel and these are sandwiched between molds. It may be applied to various methods such as sheet blowing method.
また、本発明のブロー成形機の制御方法によつ
て制御すべきブロー成形機は、パリソンの成形と
ブローの工程とを分離したコールドパリソン法、
射出成形で有底パリソンを造るインジエクシヨン
ブロー成形法等を用いた成形機であつても良い。 Further, the blow molding machine to be controlled by the blow molding machine control method of the present invention includes a cold parison method in which the parison molding and blowing steps are separated;
It may be a molding machine that uses an injection blow molding method or the like to produce a bottomed parison by injection molding.
即ち、本発明のブロー成形機の制御方法によつ
て制御すべきブロー成形機とは、ブロー成形工程
を具備する成形機の総てを包含するものである。 That is, the blow molding machines to be controlled by the blow molding machine control method of the present invention include all molding machines equipped with a blow molding process.
また、本発明のブロー成形機の制御方法に特開
昭59−176024号公報に記載された型締力制御方法
を組合せると、消費エネルギーを大幅に節減する
ことができる。 Furthermore, if the method for controlling the blow molding machine of the present invention is combined with the mold clamping force control method described in JP-A-59-176024, energy consumption can be significantly reduced.
尚、本発明は、ポリエチレン、ポリプロピレ
ン、ポリ塩化ビニル、ポリエチレンテレフタレー
ト等の合成樹脂による中空品の成形に好適であ
る。 The present invention is suitable for molding hollow articles made of synthetic resins such as polyethylene, polypropylene, polyvinyl chloride, and polyethylene terephthalate.
本発明のブロー成形機の制御方法によれば、閉
じた金型内のパリソンへの吹き込みノズルの打ち
込みに際し、この打ち込みと前後して吹き込みノ
ズルから吐出される加圧流体の圧力が効果的に制
御されているため、打ち込み前に吹き込みノズル
から大気中に放出される加圧流体によつて生じる
騒音を低減できると共に、加圧流体を効率的に利
用することができるという卓越した効果が奏され
る。また、上記加圧流体の昇圧後、排気前に、該
加圧流体の圧力を、パリソンをキヤビテイの表面
に圧着した状態を保持するのに必要な圧力まで減
圧するので、加圧流体の圧力を必要最低限の圧力
にして消費エネルギーを大幅に削減することがで
き、また大気中に放出される加圧流体の圧力を小
さくし、排気に伴う騒音を低減することができ
る。
According to the blow molding machine control method of the present invention, when the blow nozzle is driven into a parison in a closed mold, the pressure of the pressurized fluid discharged from the blow nozzle before and after this driving is effectively controlled. This has the outstanding effect of reducing the noise caused by the pressurized fluid released into the atmosphere from the blow nozzle before driving, as well as making it possible to use the pressurized fluid efficiently. . In addition, after the pressure of the pressurized fluid is increased and before it is exhausted, the pressure of the pressurized fluid is reduced to the pressure necessary to maintain the state in which the parison is crimped to the surface of the cavity. Energy consumption can be significantly reduced by setting the required minimum pressure, and the pressure of the pressurized fluid discharged into the atmosphere can be reduced, thereby reducing noise associated with exhaust gas.
第１図〜第６図は、本発明の方法の一実施態様
を適用したブロー成形方法による中空品の連続的
な成形工程を工程順に示す斜視図、第７図は、本
発明の方法の一実施態様を適用したブロー成形方
法におけるタイムチヤート、第８図〜第１０図
は、それぞれ本発明の方法の一実施態様の実施に
用いる装置の一例の加圧空気のフロー図で、第８
図は吹き込み停止時、第９図は圧力PLの加圧空
気の吹き込み時、第１０図は圧力PHの加圧空気
の吹き込み時の状態をそれぞれ示すものである。
２……パリソン、４……金型、６……吹き込み
ノズル。
1 to 6 are perspective views showing the continuous molding process of a hollow article by a blow molding method to which an embodiment of the method of the present invention is applied, and FIG. 7 is a perspective view showing one embodiment of the method of the present invention. The time charts for the blow molding method to which the embodiment is applied, and FIGS.
The figure shows the state when the blowing is stopped, FIG. 9 shows the state when pressurized air at the pressure P L is blown, and FIG. 10 shows the state when the pressurized air at the pressure P H is blown. 2...Parison, 4...Mold, 6...Blowing nozzle.
Claims (1)
を介して上記パリソンの内部に加圧流体を吹き込
んで中空品を成形するブロー成形機の制御方法に
おいて、上記吹き込みノズルが上記加圧流体を吐
出しながら上記パリソンに打ち込まれ、上記パリ
ソンをキヤビテイの表面に圧着するのに必要な圧
力まで上記加圧流体の圧力を昇圧し、この後、該
加圧流体の圧力を、上記パリソンが上記キヤビテ
イの表面に圧着された状態を保持するのに必要な
圧力まで減圧することを特徴とするブロー成形機
の制御方法。1. A control method for a blow molding machine that holds a parison in a mold and blows pressurized fluid into the inside of the parison through a blowing nozzle to form a hollow product, wherein the blowing nozzle discharges the pressurized fluid. The pressure of the pressurized fluid is increased to the pressure required to press the parison to the surface of the cavity, and then the parison increases the pressure of the pressurized fluid to the surface of the cavity. A control method for a blow molding machine, characterized in that the pressure is reduced to the pressure necessary to maintain the crimped state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281146A JPS63134221A (en) | 1986-11-26 | 1986-11-26 | Control method for blow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281146A JPS63134221A (en) | 1986-11-26 | 1986-11-26 | Control method for blow molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63134221A JPS63134221A (en) | 1988-06-06 |
| JPH0453697B2 true JPH0453697B2 (en) | 1992-08-27 |
Family
ID=17635003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61281146A Granted JPS63134221A (en) | 1986-11-26 | 1986-11-26 | Control method for blow molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63134221A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3013692B1 (en) * | 2013-06-24 | 2019-07-31 | Discma AG | Method for forming containers by applying a pressure profile controled by a stretch rod |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5549237Y2 (en) * | 1977-06-20 | 1980-11-17 |
-
1986
- 1986-11-26 JP JP61281146A patent/JPS63134221A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63134221A (en) | 1988-06-06 |
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