JPH0322290B2 - - Google Patents
Info
- Publication number
- JPH0322290B2 JPH0322290B2 JP61281145A JP28114586A JPH0322290B2 JP H0322290 B2 JPH0322290 B2 JP H0322290B2 JP 61281145 A JP61281145 A JP 61281145A JP 28114586 A JP28114586 A JP 28114586A JP H0322290 B2 JPH0322290 B2 JP H0322290B2
- Authority
- JP
- Japan
- Prior art keywords
- parison
- pressure
- blow molding
- molding machine
- mold
- 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
- 238000000071 blow moulding Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 32
- 239000012530 fluid Substances 0.000 claims description 23
- 238000007664 blowing Methods 0.000 claims description 16
- 238000000465 moulding Methods 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 229910001751 gemstone Inorganic materials 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 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
- B29C49/783—Measuring, controlling or regulating blowing pressure
-
- 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
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7832—Blowing with two or more pressure levels
-
- 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
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7832—Blowing with two or more pressure levels
- B29C2049/7833—Blowing with three or more pressure levels
-
- 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
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7835—Pressure reduction speed
-
- 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
- B29C49/04—Extrusion 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及びその装
置に関し、詳しくは、パリソンの内部に吹き込ま
れる加圧流体の圧力を制御することによつて、加
圧流体を効率的に利用し得るようにしたブロー成
形機の制御方法及びその装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling a blow molding machine and a device thereof, and more particularly, the present invention relates to a method for controlling a blow molding machine and a device therefor, and more specifically, a method for controlling a blow molding machine by controlling the pressure of pressurized fluid blown into the inside of a parison. The present invention relates to a blow molding machine control method and apparatus that enable efficient use of pressurized fluid.
ブロー成形機の制御方法及びその装置に関する
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 blow molding machine control methods and devices include Japanese Patent Application Laid-Open No. 176024/1983;
The one described in Japanese Patent Application Laid-open No. 60-64824 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脹させた後、金型を
閉じ、パリソンに充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
膨脹させる時には低圧空気（例えば0.6バール）
が、又金型内で膨脹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 to apply sufficient pressure 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 in 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
のパリソンの内部に吹き込ま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,
Although it is described that energy consumption is reduced by controlling the mold clamping force, there is no mention of controlling the pressure of the pressurized fluid blown into the inside of the parison in the closed mold. There's no suggestion.
また、特開昭60−64824号公報には、パリソン
を金型外で膨脹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の内部に吹き込まれる加
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, although JP-A-60-64824 describes that the parison is expanded outside the mold,
There is no mention or suggestion of controlling the pressure of pressurized fluid blown into the interior of the parison within a closed mold.
何れにせよ、上記両公報には、閉じた金型内の
パリソンの内部に吹き込ま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、閉じた
金型内のパリソンの内部の圧力は、キヤビテイの
表面へのパリソン圧着後も、この圧着に要する高
圧で維持されるものと推察されるが、このように
閉じた金型内のパリソンの内部の圧力をキヤビテ
イの表面へのパリソン圧着後も高圧で維持するこ
とは、加圧流体を効率的に利用するものではな
く、又その排気時に激しい騒音を伴う等の問題点
がある。 In any case, there is no description or suggestion in the above-mentioned publications about controlling the pressure of the pressurized fluid blown into the inside of the parison in the closed mold, and therefore, the statements in these publications are In terms of technology, it is assumed that the pressure inside the parison inside the closed mold is maintained at the high pressure required for crimping even after the parison is crimped onto the cavity surface, just as in conventional blow molding machines. However, maintaining the internal pressure of the parison in a closed mold at a high pressure even after the parison is crimped onto the cavity surface does not make efficient use of the pressurized fluid, and There are problems such as intense noise during exhaust.
従つて、本発明の目的は、閉じた金型内のパリ
ソンの内部に吹き込まれる加圧流体の圧力を制御
することによつて、加圧流体を効率的に利用し得
るようにすると共に、排気等の騒音を低減し得る
ようにしたブロー成形機の制御方法及びその装置
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 blown into the inside of a parison in a closed mold, thereby making it possible to efficiently utilize the pressurized fluid, and to reduce the exhaust gas. It is an object of the present invention to provide a control method for a blow molding machine and a device thereof that can reduce noises such as the above.
本発明は、パリソンを金型内に保持し、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、上記パ
リソンが上記加圧流体によつてキヤビテイの表面
に圧着された後、上記加圧流体の圧力を減圧し、
しかる後排気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 in which a parison is held in a mold and a pressurized fluid is blown into the inside of the parison to form a hollow product. After being crimped, the pressure of the pressurized fluid is reduced,
The above object has been achieved by providing a method for controlling a blow molding machine, which is characterized in that the blow molding machine is then evacuated.
また、本発明は、斯るブロー成形機の制御方法
の実施に直接使用する装置として、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装置において、それぞれ
異なる圧力の加圧流体を供給する複数個の圧力源
を具備させると共に、それぞれの上記圧力源と上
記吹き込みノズルとの間に切換弁を具備させたこ
とを特徴とするブロー成形機の制御装置を提供す
るものでもある。 Furthermore, the present invention provides a device that is directly used to carry out the control method for a blow molding machine, which holds a parison in a mold and blows pressurized fluid into the parison through a blow nozzle to produce a hollow product. A control device for a blow molding machine for molding is provided with a plurality of pressure sources supplying pressurized fluids each having a different pressure, and a switching valve is provided between each of the pressure sources and the blow nozzle. The present invention also provides a control device for a blow molding machine characterized by the following.
〔実施例〕
以下、先ず、本発明のブロー成形機の制御方法
の一実施態様を、第１図〜第６図に基づいて説明
する。[Example] First, one embodiment of the method for controlling a blow molding machine of the present invention will be described based on FIGS. 1 to 6.
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, and the hot cutter 5 cuts the parison 2. As shown in FIG. 4, the mold 4 holding the cut parison 2 is moved (diagonally lowered) to a position where pressurized fluid, for example pressurized air, is blown into the parison 2, as shown in FIG. The blowing nozzle 6 blows in and blows pressurized air while moving toward the mold 4 and descending to be driven into the mold 4, and the parison 2 is crimped onto the surface of the cavity by the pressurized air to correspond to the shape of the cavity. It is molded into a hollow product. Once the hollow product is molded, it is evacuated to the atmosphere, and then, as shown in FIG. They are arranged and discharged onto the conveyor 8.
而して、本発明の方法においては、パリソン２
への吹き込みノズル６の打ち込み後排気前におい
て、吹き込みノズル６から吐出される加圧空気の
圧力は次の如く制御されている。即ち、パリソン
２への吹き込みノズル６の打ち込み後において、
先ず、第７図のタイムチヤートに示す如く、吹き
込みノズル６から吐出される加圧空気が、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PH（４〜10Kg／cm2、例えば７Kg／cm2）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圧力PL（２〜５
Kg／cm2、例えば3.5Kg／cm2）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。こ
のようにパリソン２内に吹き込む加圧空気の圧力
制御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圧力空気の圧力を小
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。 Therefore, in the method of the present invention, parison 2
The pressure of the pressurized air discharged from the blow nozzle 6 is controlled as follows after blowing the blow nozzle 6 into the air and before exhausting the air. That is, after driving the blow nozzle 6 into the parison 2,
First, as shown in the time chart of FIG. 7, the pressurized air discharged from the blow nozzle 6 has a pressure P H (4 to 10 Kg/cm 2 , for example, 7 Kg) necessary to press the parison 2 to the surface of the cavity. /cm 2 ) into the parison 2 between t 2 and t 3 (2 to 6 seconds, e.g. 4 seconds), and by this blowing, the hollow article 7 is formed along the surface of the cavity and cooled. Ru. Next, before evacuation, the pressure of the pressurized air is reduced to a pressure P L (2 to 5
Kg/cm 2 , e.g. 3.5Kg/cm 2 ) within the parison 2 .
During ~ t4 (3-10 seconds, e.g. 5.2 seconds), pressurized air is blown in to further cool the hollow article 7. By controlling the pressure of the pressurized air blown into the parison 2 in this way, the minimum necessary blowing pressure can always be applied inside the parison 2, and energy consumption can be significantly reduced. Since the pressure of the pressurized air released into the atmosphere can be reduced, noise associated with 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、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の間でも前記
圧力PLの加圧空気を使用し、且つ、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、t0〜t2の間と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。 Furthermore, in the embodiment described above, as shown in FIG .
The pressurized air at the pressure P L is used between t 0 and t 2 immediately after the hollow product 7 is driven in, and the pressurized air at the pressure P L is also used between t 6 and t 7 when the hollow product 7 is discharged. Since pressurized air is used, the pressure of the pressurized air released into the atmosphere is relatively small, making it possible to lower the noise associated with the release of pressurized air into the atmosphere. Between 0 and t2 and between t6 and t7 , pressurized air at the pressure P H can also be used.
次に、本発明のブロー成形機の制御装置を第８
図〜第１０図に示す一実施例について説明する。 Next, the control device for the blow molding machine of the present invention is installed in the eighth
An embodiment shown in FIGS. 1 to 10 will be described.
第８図〜第１０図は、それぞれ本発明の装置の
一実施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の加圧空気が圧力源から供給され
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した他の圧力源
から圧力PLの加圧空気が供給されている。 8 to 10 are flow diagrams of pressurized air in one embodiment of the apparatus of the present invention, in which FIG. 8 shows when blowing is stopped, FIG. 9 shows when blowing pressurized air at pressure P L , FIG. 10 shows the conditions when pressurized air at pressure P H is blown. In these drawings, 6 is a blowing nozzle, DCV-H,
DCV-L is a switching valve, SV is a shuttle valve, QEV is a quick exhaust valve, PRV is a pressure reducing valve, and SOV is a solenoid valve.
The switching valves DCV-H and DCV-L are air-operated valves controlled via the solenoid valve SOV.
H is supplied with pressurized air at a pressure P H from a pressure source, and the switching valve DCV-L is supplied with pressure P L from another pressure source created by reducing the pressure from the above pressure source via a pressure reducing valve PRV. Pressurized air is supplied.
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、上記の実施例の装置は、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 apparatus of the above embodiment 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及びそ
の装置の一実施態様及び一実施例について説明し
たが、本発明においてパリソンとは、金型に挟ん
で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及びその装置は、これらの
一実施態様及び一実施例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。 As above, one embodiment and one example of the control method for a blow molding machine and its apparatus according to the present invention have been described. In the present invention, a parison is a preformed material that is sandwiched between molds and into which pressurized fluid can be blown. It means a hollow material extruded into a tube shape, but is not limited to a hollow material extruded into a tube shape. Further, the blow molding machine control method and apparatus of the present invention are not limited to these one embodiment and one example. For example, instead of extruding a tube-shaped parison, two sheets are extruded in parallel. It may be applied to various methods such as extrusion and a sheet blowing method in which the extrusion is sandwiched between molds.
また、本発明のブロー成形機の制御方法及びそ
の装置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
ジヨ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 and device of the present invention includes a cold parison method in which the parison molding and blowing steps are separated, and an in-jewel method in which a bottomed parison is made by injection molding. A molding machine using a blow molding method or the like may also be used.
即ち、本発明のブロー成形機の制御方法及びそ
の装置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 and apparatus of the present invention include all molding machines that have a blow molding process.
また、本発明のブロー成形機の制御方法及びそ
の装置に特開昭59−176024号公報に記載された型
締力制御方法を組合せると、消費エネルギを大幅
に節減することができる。 Furthermore, if the method and apparatus for controlling a blow molding machine of the present invention are 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及びその装置
によれば、閉じた金型内のパリソンの内部に吹き
込まれる加圧流体の圧力が効果的に制御されるた
め、加圧流体を効率的に利用することができると
共に、成形されたパリソンの内部からの加圧流体
の放出時に伴う騒音を低減することができるとい
う絶大な効果が奏される。
According to the blow molding machine control method and apparatus of the present invention, the pressure of the pressurized fluid blown into the inside of the parison in the closed mold is effectively controlled, so that the pressurized fluid is used efficiently. In addition, it is possible to reduce the noise that accompanies the release of the pressurized fluid from inside the molded parison, which is a tremendous effect.
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、それぞれ本発明の装置の一実施例の加圧空気
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、DCV−Ｈ，DCV−Ｌ……切換弁。
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. Time charts for the blow molding method to which the embodiment is applied, FIGS. 8 to 10 are flow diagrams of pressurized air in one embodiment of the apparatus of the present invention, respectively, FIG. 8 is when blowing is stopped, and FIG. 9 is 10 shows the state when pressurized air at pressure P L is blown, and FIG. 10 shows the state when pressurized air at pressure P H is blown. 2...Parison, 4...Mold, 6...Blowing nozzle, DCV-H, DCV-L...Switching valve.
Claims (1)
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、上記パリソンが
上記加圧流体によつてキヤビテイの表面に圧着さ
れた後、上記加圧流体の圧力を減圧し、しかる後
排気することを特徴とするブロー成形機の制御方
法。 ２ 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装置に
おいて、それぞれ異なる圧力の加圧流体を供給す
る複数個の圧力源を具備させると共に、それぞれ
の上記圧力源と上記吹き込みノズルとの間に切換
弁を具備させたことを特徴とするブロー成形機の
制御装置。[Scope of Claims] 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 to form a hollow product, wherein the parison is held by the pressurized fluid. A method for controlling a blow molding machine, which comprises reducing the pressure of the pressurized fluid after it is crimped onto the surface of a cavity, and then exhausting the fluid. 2. In a control device 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, a plurality of blow molding machines each supplying pressurized fluid at a different pressure are used. 1. A control device for a blow molding machine, comprising: two pressure sources, and a switching valve between each pressure source and the blow nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281145A JPS63134220A (en) | 1986-11-26 | 1986-11-26 | Control method and device for blow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61281145A JPS63134220A (en) | 1986-11-26 | 1986-11-26 | Control method and device for blow molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63134220A JPS63134220A (en) | 1988-06-06 |
| JPH0322290B2 true JPH0322290B2 (en) | 1991-03-26 |
Family
ID=17634990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61281145A Granted JPS63134220A (en) | 1986-11-26 | 1986-11-26 | Control method and device for blow molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63134220A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999012724A1 (en) * | 1997-09-10 | 1999-03-18 | Wella Aktiengesellschaft | Method for producing foamed plastic hollow bodies |
| GB2380967B (en) * | 2001-09-28 | 2003-12-24 | Roton Compressor Services Ltd | Blow moulding control system |
| CN108556311A (en) * | 2018-02-06 | 2018-09-21 | 江苏新美星包装机械股份有限公司 | For controlling the valve group mechanism for blowing bottle high pressure gas |
| CN108340560A (en) * | 2018-02-06 | 2018-07-31 | 江苏新美星包装机械股份有限公司 | Blow the control method of bottle high pressure gas |
-
1986
- 1986-11-26 JP JP61281145A patent/JPS63134220A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63134220A (en) | 1988-06-06 |
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