JPH01241426A - Multi-layer blow molding device - Google Patents

Multi-layer blow molding device

Info

Publication number
JPH01241426A
JPH01241426A JP63068707A JP6870788A JPH01241426A JP H01241426 A JPH01241426 A JP H01241426A JP 63068707 A JP63068707 A JP 63068707A JP 6870788 A JP6870788 A JP 6870788A JP H01241426 A JPH01241426 A JP H01241426A
Authority
JP
Japan
Prior art keywords
rise
amount
plunger
amounts
target
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
Application number
JP63068707A
Other languages
Japanese (ja)
Inventor
Hisahiko Fukase
久彦 深瀬
Akihiro Nomura
昭博 野村
Akira Iwawaki
岩脇　章
Yoshiharu Shidara
設楽　義晴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP63068707A priority Critical patent/JPH01241426A/en
Publication of JPH01241426A publication Critical patent/JPH01241426A/en
Pending legal-status Critical Current

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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
    • B29C48/48—Two or more rams or pistons
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
    • B29C48/338—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location using a die with concentric parts, e.g. rings, cylinders
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • 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
    • B29C2049/787—Thickness
    • B29C2049/78705—Thickness of a layer, e.g. intermediate layer
    • 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
    • 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
    • B29C49/041—Extrusion blow-moulding using an accumulator head

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To perform injection molding of parison in accordance with preset thickness ratios of layers each, by a method wherein target amount of rise of each plunger is operated through a detected value of a flow detector, a difference between the target amount of rise and measured amount of rise of the each plunger is operated and the amount of rise of the each plunger is controlled based on an operated value. CONSTITUTION:Amounts oil forcing-in of materials 1, 2 to be pressed into chambers 5, 6 are detected with flow detectors 14, 15 by actuating extruding machines 3, 4 and measured amounts of rise of plungers 8, 9 following the forcing-in of the materials 1, 2 are detected by amount of rise detectors 18, 19. The amounts of forcing-in of the materials 1, 2 detected by flow detectors 14, 15 are operated and converted into target amounts of rise of the plungers 8, 9 to the amounts of the forcing-in of the materials 1, 2 by operating units 20, 21 and differences among the target amounts of rise of the plungers 8, 9 and the measured amounts of rise of the plungers 8, 9 are operated by subtractors 22, 23. Controllers 26, 27 control in order control valves 24, 25 supplying hydraulic liquid to cylinders 16, 17 according to operated values of the subtractors 22, 23 so that the measured amounts of rise of the plungers 8, 9 coincide with the target amounts of rise of them. Injection molding of parison 7 is performed by lowering the plungers 8, 9 at a time.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明はパリソンを射出成形する多層ブロー成形装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a multilayer blow molding apparatus for injection molding parisons.

［従来の技術］ 第２図及び第３図に示すように、従来、多層ブロー成形
装置では、異なる材料１．２を押出機３．４によってチ
ャンバ５．６内に押込んでパリソン７を射出成形する際
に、各層のプランジャ８゜９の先端に配設した背圧セン
サｔｏ、ｔｔによってプランジャ８，９の背圧を検出し
、該プランジャ８．９の背圧が等しくなるようにチャン
バ５．６内に材＄４１．２を供給してプランジャ８，９
を後退（上昇）させ、その後プランジャ８，９の背圧を
一定に保つように液圧シリンダ１６．１７の制御弁２４
．２５を制御してプランジャ８．９を下降させることに
よりパリソン７を射出成形している。[Prior Art] As shown in FIGS. 2 and 3, conventionally, in a multilayer blow molding apparatus, a parison 7 is injection molded by forcing different materials 1.2 into a chamber 5.6 by an extruder 3.4. At this time, the back pressures of the plungers 8, 9 are detected by back pressure sensors to, tt provided at the tips of the plungers 8, 9 of each layer, and the chambers 5, 9 are adjusted so that the back pressures of the plungers 8, 9 are equal. Supply material $41.2 into the plungers 8 and 9.
The control valves 24 of the hydraulic cylinders 16 and 17
．． 25 to lower the plunger 8.9, the parison 7 is injection molded.

［発明が解決しようとする課題］ しかし、チャンバ５．６は連通しているので、押出機３
．４によるチャンバ５．６への材料１．２の押込み時、
押込み量の経時的変化等によって、材料１．２の分布が
第３図に示すように不均一になっても、背圧センサ１０
，１１が検知する背圧か一定であれば（チャンバ５，６
が連通しているので同一圧力になる）材料１．２の分布
の変化は検知できず、各押出機３，４による材料１．２
の押込み量に対する各層のプランジャ８．９の上昇量が
一致しなくなり、従って特にパリソン７を射出し始める
ときにパリソン７の肉厚比が変化して設定どおりになら
ないという問題点があった。[Problem to be solved by the invention] However, since the chambers 5 and 6 are in communication, the extruder 3
．． Upon pushing the material 1.2 into the chamber 5.6 by 4,
Even if the distribution of the material 1.2 becomes uneven as shown in FIG. 3 due to changes in the pushing amount over time, etc., the back pressure sensor 10
, 11 is constant (chambers 5, 6
(Because the two are in communication, the pressure is the same) No change in the distribution of material 1.2 can be detected, and the material 1.2 produced by each extruder 3, 4
There was a problem in that the amount of rise of the plunger 8.9 of each layer did not match the amount of push-in, and therefore the wall thickness ratio of the parison 7 changed especially when the parison 7 started to be injected and did not meet the setting.

本発明は上述の問題点を解決するもので、設定どおりの
各層の肉厚比でパリソンを射出成形する多層ブロー成形
装置を提供することを目的としている。The present invention solves the above-mentioned problems, and aims to provide a multilayer blow molding apparatus for injection molding a parison with a set wall thickness ratio of each layer.

［課題を解決するための手段］ 本発明の第１の発明は、アキュームレータ式多層ブロー
成形装置において、各材料の押込み量を別個に検出可能
な流量検出器と、各プランジャの実上昇量を別個に検出
可能な上昇量検出器とを設け、前記流量検出器の検出値
から各プランジャの目標上昇ユを演算する演算器を設け
、各プランジャの目標上昇量と実上昇ごとの差を演算す
る引き算器を設け、該引き算器の演算値に基づいて各プ
ランジャの上昇２を制御する制御器を設けた構成を備え
ている。[Means for Solving the Problems] A first aspect of the present invention is to provide an accumulator type multilayer blow molding apparatus that includes a flow rate detector that can separately detect the amount of push-in of each material, and a flow rate detector that can separately detect the amount of rise of each plunger. a rise amount detector capable of detecting the flow rate, and a calculator for calculating the target rise amount of each plunger from the detected value of the flow rate detector, and a subtraction method for calculating the difference between the target rise amount and the actual rise of each plunger. A controller is provided for controlling the rise 2 of each plunger based on the calculated value of the subtractor.

本発明の第２の発明は、アキュームレータ式多層ブロー
成形装置において、各材料の押込み量を別個に検出可能
な流量検出器と、各プランジャの実上昇量を別個に検出
可能な上昇量検出器とを設け、前記流量検出器の検出値
から各プランジャの目標上昇量を演算する演算器を設け
、該演算器の演算値に従って各プランジャを昇降させ得
るディジタルサーボシリンダを設けた構成を備えている
。A second invention of the present invention provides an accumulator type multilayer blow molding apparatus that includes a flow rate detector that can separately detect the amount of push of each material, and a rise amount detector that can separately detect the actual rise amount of each plunger. A computing device is provided to calculate a target rise amount of each plunger from the detected value of the flow rate detector, and a digital servo cylinder is provided that can raise and lower each plunger according to the computed value of the computing device.

［作　　　用］ 従って、第１の発明では、各材料の押込み量と材料の押
込みに伴う各プランジャの実上昇量とを検知し、各材料
の押込み量に対する各プランジャの目標上昇量を演算し
、前記プランジャの実上昇量と目標上昇量との差を演算
し、プランジャの上昇量か目標上昇量に合致するように
逐時プランジャの上昇量を制御してパリソンを射出成形
する。[Function] Therefore, in the first invention, the amount of pushing of each material and the actual amount of rise of each plunger accompanying the pushing of the material are detected, and the target amount of rise of each plunger with respect to the amount of pushing of each material is calculated, The difference between the actual amount of rise of the plunger and the target amount of rise is calculated, and the amount of rise of the plunger is controlled from time to time so that the amount of rise of the plunger matches the target amount of rise, and the parison is injection molded.

第２の発明では、各材料の押込み量と材料の押込みに伴
う各プランジャの実上昇ごとを検知し、各材料の押込み
ごに対する各プランジャの目標上昇量を演算し、プラン
ジャの上昇量か目標上昇量に合致するように逐次プラン
ジャの上昇量を制御してパリソンを射出成形する。In the second invention, the pushing amount of each material and each actual rise of each plunger accompanying pushing of the material are detected, the target rising amount of each plunger for each pushing of each material is calculated, and the rising amount of the plunger or the target rise is calculated. The parison is injection molded by sequentially controlling the amount of rise of the plunger to match the amount.

［実　施　例］ 以下、図面に基づいて本発明の詳細な説明する。[Example] Hereinafter, the present invention will be described in detail based on the drawings.

第１図は本発明の第１の発明の一実施例を示すもので、
押出機３，４とチャンバ５．６との間の材料管路１２．
１３に材料１．２の押込ろ２を別個に検出する流量検出
器１４．１５を設け、各層のプランジャ８，９を昇降さ
せるシリンダ１６．１７にプランジャ８，９の実上昇量
を検出する上昇量検出器１８．１９を設ける。FIG. 1 shows an embodiment of the first invention of the present invention.
Material conduit 12. between extruder 3, 4 and chamber 5.6.
13 is provided with a flow rate detector 14.15 that separately detects the push-in portion 2 of the material 1.2, and a cylinder 16.17 that raises and lowers the plungers 8 and 9 of each layer is provided with a riser that detects the actual amount of rise of the plungers 8 and 9. A quantity detector 18.19 is provided.

前記流量検出器１４．１５の検出値からプランジャ８，
９の目標上昇量を演算する演算器２０．２１を設け、プ
ランジャ８．９の目標上昇量と実上昇量との差を演算可
能な引き算器２２．２３を設け、目標上昇量と実上昇量
との差によって液圧シリンダ１６．１７の制御弁２４．
２５を制御可能な制御装置２６．２７を設ける。From the detected value of the flow rate detector 14.15, the plunger 8,
A calculator 20.21 is provided to calculate the target lift amount of the plunger 8.9, and a subtractor 22.23 is provided that can calculate the difference between the target lift amount and the actual lift amount of the plunger 8.9. Due to the difference between the control valves 24. and 17 of the hydraulic cylinders 16.17.
Control devices 26 and 27 capable of controlling 25 are provided.

なお、図中、７はパリソンを示す。In addition, in the figure, 7 indicates a parison.

上述の構成によれば、押出機３．４を作動させ、チャン
バ５，６に押込まれる材料１．２の押込み量を流量検出
器１４．１５によって検出し、材料１．２の押込みに伴
うプランジャ８，９の実上昇量を−Ｆ昇量検出器１８．
１９によりて検出する。According to the above-described configuration, the extruder 3.4 is operated, the amount of the material 1.2 pushed into the chambers 5 and 6 is detected by the flow rate detector 14.15, and The actual rise amount of the plungers 8 and 9 is detected by the -F rise amount detector 18.
Detected by 19.

前記流量検出器１４．１５によって検出された材料１．
２の押込み量を、演算器２０．２１によって材料１．２
の押込み量に対するプランジャ８．９の目標上昇量に演
算変換し、該プランジャ８．９の目標上昇口と実上昇量
との差を引き算器２２．２３によって演算する。Material detected by said flow rate detector 14.15 1.
The indentation amount of material 1.2 is determined by calculation unit 20.21.
The amount of push-in is converted into a target amount of rise of the plunger 8.9, and the difference between the target amount of rise of the plunger 8.9 and the actual amount of rise is calculated by a subtractor 22.23.

制御器２６．２７は、引き算器２２．２３の演算値に従
って、プランジャ８，９の上昇量が目標上昇量に合致す
るように、シリンダ１６．１７に圧液を供給する制御弁
２４．２５を逐時制御する。The controller 26.27 controls the control valve 24.25 for supplying pressure fluid to the cylinder 16.17 so that the amount of rise of the plungers 8, 9 matches the target amount of rise according to the calculated value of the subtractor 22.23. Continuous control.

このようにして材料の供給を行った後、プランジャ８．
９を同時に下降させてパリソン７を射出成形する。After supplying the material in this way, the plunger 8.
9 is simultaneously lowered to injection mold the parison 7.

本発明の第２の発明は、第１図に示す液圧シリンダ１８
．１７をそれぞれディジタルサーボシリンダに置替え、
演算器２０．２１の演算値（目標上昇量）を各ディジタ
ルサーボシリンダに直接入力するようにしたもので、引
き算器２２．２３を設けなくても前記第１の発明の実施
例と同様な作用効果を奏し得る。A second aspect of the present invention is a hydraulic cylinder 18 shown in FIG.
．． Replace 17 with digital servo cylinders,
The calculated value (target increase amount) of the calculating unit 20.21 is directly input to each digital servo cylinder, and the same effect as in the embodiment of the first invention can be achieved without providing the subtracter 22.23. It can be effective.

なお、本発明は上述の実施例のみに限定されるものでは
なく、３層以上のパリソンを成形する多層ブロー成形装
置にも適用できること等、本発明の要旨を逸脱しない範
囲内において種々変更を加え得ることは勿論である。It should be noted that the present invention is not limited to the above-described embodiments, but can be applied to a multilayer blow molding apparatus that molds parisons with three or more layers, and various modifications can be made without departing from the gist of the present invention. Of course you can get it.

［発明の効果］ 以上述べたように、本発明の多層ブロー成形装置によれ
ば、各チャンバに対する各材料の押込み時、各層のプラ
ンジャを材料の押込み量にあわせて上昇させるので、各
チャンバに対する材料の供給量をバランスさせることか
でき、よってパリソンの肉厚比を設定どおりに射出成形
することができる優れた作用効果を奏し得る。[Effects of the Invention] As described above, according to the multilayer blow molding apparatus of the present invention, when each material is pushed into each chamber, the plunger of each layer is raised in accordance with the amount of material pushed, so that the material is pushed into each chamber. The supply amount of the parison can be balanced, and therefore, the parison can be injection molded with the wall thickness ratio as set.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の第１の発明の一実施例を示す説明図、
第２図及び第３図は従来の多層ブロー成形装置を示す説
明図である。 図中、１４．１５は流量検出器、１８．１９は上昇量検
出器、２０．２１は演算器、２２．２３は引き算器、２
６．２７は制御装置を示す。FIG. 1 is an explanatory diagram showing an embodiment of the first invention of the present invention,
FIGS. 2 and 3 are explanatory diagrams showing a conventional multilayer blow molding apparatus. In the figure, 14.15 is a flow rate detector, 18.19 is a rise amount detector, 20.21 is an arithmetic unit, 22.23 is a subtracter, 2
6.27 indicates a control device.

Claims (1)

【特許請求の範囲】 １）アキュームレータ式多層ブロー成形装置において、
各材料の押込み量を別個に検出可能な流量検出器と、各
プランジャの実上昇量を別個に検出可能な上昇量検出器
とを設け、前記流量検出器の検出値から各プランジャの
目標上昇量を演算する演算器を設け、各プランジャの目
標上昇量と実上昇量との差を演算する引き算器を設け、
該引き算器の演算値に基づいて各プランジャの上昇量を
制御する制御器を設けたことを特徴とする多層ブロー成
形装置。 ２）アキュームレータ式多層ブロー成形装置において、
各材料の押込み量を別個に検出可能な流量検出器と、各
プランジャの実上昇量を別個に検出可能な上昇量検出器
とを設け、前記流量検出器の検出値から各プランジャの
目標上昇量を演算する演算器を設け、該演算器の演算値
に従って各プランジャを昇降させ得るディジタルサーボ
シリンダを設けたことを特徴とする多層ブロー成形装置
。[Claims] 1) In an accumulator type multilayer blow molding device,
A flow rate detector that can separately detect the pushing amount of each material and a rise amount detector that can separately detect the actual rise amount of each plunger are provided, and the target rise amount of each plunger is determined from the detection value of the flow rate detector. A calculator is provided to calculate the amount of rise, and a subtracter is provided to calculate the difference between the target amount of rise and the actual amount of rise of each plunger.
A multilayer blow molding apparatus characterized in that a controller is provided to control the amount of rise of each plunger based on the calculated value of the subtracter. 2) In an accumulator type multilayer blow molding device,
A flow rate detector that can separately detect the pushing amount of each material and a rise amount detector that can separately detect the actual rise amount of each plunger are provided, and the target rise amount of each plunger is determined from the detection value of the flow rate detector. 1. A multilayer blow molding apparatus comprising: a computing unit for computing the equation; and a digital servo cylinder capable of raising and lowering each plunger according to the computed values of the computing unit.
JP63068707A 1988-03-23 1988-03-23 Multi-layer blow molding device Pending JPH01241426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63068707A JPH01241426A (en) 1988-03-23 1988-03-23 Multi-layer blow molding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63068707A JPH01241426A (en) 1988-03-23 1988-03-23 Multi-layer blow molding device

Publications (1)

Publication Number Publication Date
JPH01241426A true JPH01241426A (en) 1989-09-26

Family

ID=13381517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63068707A Pending JPH01241426A (en) 1988-03-23 1988-03-23 Multi-layer blow molding device

Country Status (1)

Country Link
JP (1) JPH01241426A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0567164A1 (en) * 1993-06-29 1993-10-27 Maag Pump Systems AG Storage head - blow molding apparatus
EP0633120A1 (en) * 1993-06-29 1995-01-11 GREGOR HOFBAUER GmbH Process and apparatus for the production of blow-moulded articles
JP2012024936A (en) * 2010-07-20 2012-02-09 Japan Steel Works Ltd:The Method and apparatus for controlling blow molding machine
WO2019051051A1 (en) * 2017-09-08 2019-03-14 Graham Packaging Company, L.P. Vertically added processing for blow molding machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0567164A1 (en) * 1993-06-29 1993-10-27 Maag Pump Systems AG Storage head - blow molding apparatus
EP0633120A1 (en) * 1993-06-29 1995-01-11 GREGOR HOFBAUER GmbH Process and apparatus for the production of blow-moulded articles
WO1995001252A1 (en) * 1993-06-29 1995-01-12 Gregor Hofbauer Gmbh Process and device for producing blow moulded parts
JP2012024936A (en) * 2010-07-20 2012-02-09 Japan Steel Works Ltd:The Method and apparatus for controlling blow molding machine
WO2019051051A1 (en) * 2017-09-08 2019-03-14 Graham Packaging Company, L.P. Vertically added processing for blow molding machine
US11040475B2 (en) 2017-09-08 2021-06-22 Graham Packaging Company, L.P. Vertically added processing for blow molding machine

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