JPH035294B2 - - Google Patents

Info

Publication number
JPH035294B2
JPH035294B2 JP60170165A JP17016585A JPH035294B2 JP H035294 B2 JPH035294 B2 JP H035294B2 JP 60170165 A JP60170165 A JP 60170165A JP 17016585 A JP17016585 A JP 17016585A JP H035294 B2 JPH035294 B2 JP H035294B2
Authority
JP
Japan
Prior art keywords
parison
length
mandrel
wall thickness
moving block
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
Application number
JP60170165A
Other languages
Japanese (ja)
Other versions
JPS6230020A (en
Inventor
Akihiro Nomura
Hisahiko Fukase
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 JP60170165A priority Critical patent/JPS6230020A/en
Priority to SE8602466A priority patent/SE8602466L/en
Priority to IT20626/86A priority patent/IT1204887B/en
Priority to KR1019860004335A priority patent/KR910000498B1/en
Priority to DE19863619113 priority patent/DE3619113A1/en
Priority to CN198686104270A priority patent/CN86104270A/en
Priority to GB8618580A priority patent/GB2178361B/en
Publication of JPS6230020A publication Critical patent/JPS6230020A/en
Publication of JPH035294B2 publication Critical patent/JPH035294B2/ja
Granted 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/7686—Measuring, controlling or regulating the ejected articles, e.g. weight control
    • 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
    • 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
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B29C48/2528—Drive or actuation means for non-plasticising purposes, e.g. dosing unit
    • 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
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C49/0411—Means for defining the wall or layer thickness
    • B29C49/04114—Means for defining the wall or layer thickness for keeping constant thickness
    • 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
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C2049/787—Thickness
    • 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
    • B29C2049/788—Controller type or interface
    • B29C2049/78805—Computer or PLC control
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92076—Position, e.g. linear or angular
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92142—Length
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92152—Thickness
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92438—Conveying, transporting or storage of 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92466—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92571—Position, e.g. linear or angular
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92961—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
    • 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
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/42412—Marking or printing
    • B29C49/42413—Marking or printing with a pattern for analysing deformation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0022—Bright, glossy or shiny surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2022/00—Hollow articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明はプラスチツク吹込成形方法、特にパリ
ソン肉厚の制御方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a plastic blow molding method, and more particularly to a method for controlling parison wall thickness.

［従来の技術］ 従来のプラスチツク吹込成形装置の概略は第２
図に示してあり、図示してないダイスにパリソン
（ノズルから押出される筒状の可塑性体）１成形
用の二重コーン状をしたヘツド２を取付け、該ヘ
ツド２内にサーボシリンダー３により昇降するマ
ンドレル４を挿入して該マンドレル４の下端と前
記ヘツド２内面下端との間隔をマンドレル４の昇
降により調整し得るようにしたノズルスリツト５
を設け、前記ヘツド２とマンドレル４との間に原
料６を押出す中空状の射出プランジヤー７を射出
シリンダー８によつて昇降し得るように設け、且
つ射出プランジヤー７の射出ストロークを検出す
る検出器９を設け、該検出器９をノズルスリツト
５の幅のパターンを設定する設定器（例えば公知
のピンボードあるいはスライドスイツチ）を具備
せる設定装置１０に接続し、該設定装置１０に前
記サーボシリンダー３に接続せるサーボバルブ１
１とパリソン１の方向（押出し方向）に所要の間
隔でマーク１２を付けるマーカー１３を接続す
る。又試成形品１５のマーク１２を付した部分の
肉厚を測定するため超音波厚み計のごとき肉厚測
定器１４を用意する。[Prior art] A general outline of the conventional plastic blow molding equipment is given in Section 2.
A double cone-shaped head 2 for forming a parison (a cylindrical plastic body extruded from a nozzle) 1 is attached to a die shown in the figure but not shown, and a servo cylinder 3 lifts and lowers the head 2 into the head 2. A nozzle slit 5 into which a mandrel 4 is inserted, and the distance between the lower end of the mandrel 4 and the lower end of the inner surface of the head 2 can be adjusted by raising and lowering the mandrel 4.
A hollow injection plunger 7 for extruding the raw material 6 is provided between the head 2 and the mandrel 4 so as to be movable up and down by an injection cylinder 8, and a detector for detecting the injection stroke of the injection plunger 7. 9, and the detector 9 is connected to a setting device 10 equipped with a setting device (for example, a known pin board or slide switch) for setting the pattern of the width of the nozzle slit 5. Connectable servo valve 1
1 and a marker 13 that makes marks 12 at required intervals in the direction of the parison 1 (extrusion direction) is connected. In addition, a wall thickness measuring device 14 such as an ultrasonic thickness gauge is prepared in order to measure the wall thickness of the portion of the sample molded product 15 marked with the mark 12.

上記の装置にあつてはパリソンの肉厚設定は次
のようにして行う。すなわち、先ずパリソンの押
出しの経過に伴い変化する量、例えば射出プラン
ジヤー７の射出ストロークを独立変数とし、射出
プランジヤー７の一定間隔ごとの各ノズルスリツ
ト幅Siをパリソン１の肉厚膨脹比偏肉等を考慮し
て推定し、射出プランジヤー７の各所定位置にお
けるノズルスリツト幅Siを前記ノズルスリツト幅
のパターンの設定器に設定し、押出しを開始す
る。そうすると射出シリンダー８によつて押出し
成形が開始され、射出プランジヤー７の位置が検
出器９によつて連続的に設定装置１０に送られ、
射出プランジヤー７の設定した各位置ごとにサー
ボシリンダー３が作動してマンドレル４が昇降
し、ノズルスリツト幅Siが設定値にされると同時
に設定装置１０からマーカー１３に信号が送ら
れ、射出プランジヤー７の各設定位置に対応して
パリソン１にマーク１２が付される。このマーク
１２は射出プランジヤー７の射出ストロークを基
準にしているため、縦に並んだ状態になる。 In the above device, the thickness of the parison is set as follows. That is, first, the amount that changes with the progress of extrusion of the parison, for example, the injection stroke of the injection plunger 7, is taken as an independent variable, and the width S i of each nozzle slit at a constant interval of the injection plunger 7 is determined by the thickness expansion ratio of the parison 1, the thickness deviation, etc. The nozzle slit width S i at each predetermined position of the injection plunger 7 is set in the nozzle slit width pattern setting device, and extrusion is started. Extrusion molding is then started by the injection cylinder 8, and the position of the injection plunger 7 is continuously sent to the setting device 10 by the detector 9.
The servo cylinder 3 operates at each set position of the injection plunger 7 to raise and lower the mandrel 4, and at the same time the nozzle slit width S i is set to the set value, a signal is sent from the setting device 10 to the marker 13, and the injection plunger 7 Marks 12 are attached to the parison 1 corresponding to each setting position. Since the marks 12 are based on the injection stroke of the injection plunger 7, they are arranged vertically.

パリソン１の押出し成形が完了したら、これを
型から取外し、パリソン１のマーク１２を付した
部分の肉厚を肉厚測定器１４で測定し、当初念頭
においた目標肉厚値と各マーク１２における実際
肉厚値とを作業員が比較し、目標肉厚値に対して
測定した実際肉厚値が薄い個所は、その偏差に応
じてノズルスリツト幅Siが大きくなるよう設定器
を調整し、目標肉厚値に対して実際肉厚値が厚い
個所は、その偏差に応じてノズルスリツト幅Siが
小さくなるよう設定器を調整し、再び前述同様に
して押出し成形を行い、押出し成形の完了したパ
リソン１のマーク１２を付した部分の実際肉厚値
を測定して目標肉厚値と比較し、各マーク１２の
実際肉厚値が目標肉厚値と大体一致したらノズル
スリツト幅Siの調整は終了したわけであるから、
以後連続生産に入る。 When the extrusion molding of parison 1 is completed, it is removed from the mold, and the wall thickness of the part of parison 1 marked with marks 12 is measured using the wall thickness measuring device 14, and the target wall thickness value at each mark 12 is determined at the beginning. The worker compares the actual wall thickness value with the target wall thickness value, and in areas where the measured actual wall thickness value is thinner than the target wall thickness value, the setting device is adjusted so that the nozzle slit width S i becomes larger according to the deviation. For areas where the actual wall thickness is thicker than the actual wall thickness, adjust the setting device so that the nozzle slit width S i becomes smaller according to the deviation, and extrude again in the same manner as described above. Measure the actual wall thickness value of the portion marked with mark 12 of 1 and compare it with the target wall thickness value, and if the actual wall thickness value of each mark 12 roughly matches the target wall thickness value, the adjustment of the nozzle slit width S i is completed. Because I did it,
After that, it will go into continuous production.

［発明が解決しようとする問題点］ しかし、上記従来方式においては、 (i) ノズルスリツト幅Siが周方向には均一である
ことを前提としているため、成形品に開口或い
は補強部などを備えるためにパリソンの周方向
に厚肉部を備えるような場合において、周方向
のギヤツププロフイルを知ることはできない。[Problems to be Solved by the Invention] However, in the above conventional method, (i) it is assumed that the nozzle slit width S i is uniform in the circumferential direction, so the molded product is not provided with an opening or a reinforcing portion, etc. Therefore, in cases where the parison has a thick portion in the circumferential direction, it is not possible to know the gap profile in the circumferential direction.

(ii) 該成形品の検出した厚みをギヤツプコントロ
ールにフイードバツクさせるのみでは、パリソ
ン長さが保証されず、設定変更した個所が型の
同じ場所へ行くとは限らず実用的でない。(ii) Merely feeding back the detected thickness of the molded product to the gap control does not guarantee the parison length and is not practical as the changed settings will not necessarily go to the same location on the mold.

(iii) ノズルスリツト幅の設定作業が作業員によつ
て行われているため、作業が煩雑で非能率的で
ある。(iii) Since the work of setting the nozzle slit width is performed by a worker, the work is complicated and inefficient.

等の問題点を有していた。It had the following problems.

本発明は、上記問題点に着目してなしたもの
で、マンドレルの昇降による定常肉厚部の制御と
移動ブロツクによる厚肉部の制御を行うようにし
たプラスチツク吹込成形において、周方向のギヤ
ツププロフイルとパリソンの長さを同時にしかも
自動的に制御することを目的としている。 The present invention has been made in view of the above-mentioned problems, and includes a gear in the circumferential direction in plastic blow molding in which the steady thick part is controlled by raising and lowering the mandrel and the thick part is controlled by a moving block. The purpose is to simultaneously and automatically control the profile and parison lengths.

［問題点を解決するための手段］ 本発明は、上記技術的課題を解決しようとした
もので、マンドレルの昇降による定常肉厚部の制
御と移動ブロツクの半径方向の移動による厚肉部
の制御を行うようにしたプラスチツク吹込成形方
法において、パリソン周方向における定常肉厚部
と厚肉部の複数個所に、縦方向に所要の間隔でマ
ーカーによりマークを付け、成形後成形品の前記
縦方向のマークを付した位置の肉厚を測定し、該
測定結果を制御装置において予め入力された目標
肉厚値と比較して肉厚の差が小さくなるよう次回
のマンドレル及び移動ブロツクのノズルスリツト
幅を求め、その結果によりマンドレル及び移動ブ
ロツクのノズルスリツト幅を各個に調整し、更に
パリソンの長さを検出してその長さ信号を前記制
御装置に入力し、制御装置に予め入力されている
目標パリソン長さと比較して、ノズルスリツトを
射出量一定としてパリソン長さが長ければ全長に
わたり厚くする、逆ならば薄くする等の方法によ
り長さの差が小さくなるように前記マンドレル及
び移動ブロツクの位置を全体的に調整することを
特徴とするプラスチツク吹込成形方法、に係るも
のである。[Means for Solving the Problems] The present invention is an attempt to solve the above-mentioned technical problems, and includes control of a steady thick part by raising and lowering a mandrel and control of a thick part by moving a moving block in the radial direction. In the plastic blow molding method, marks are made with markers at required intervals in the longitudinal direction at multiple locations in the constant thick part and the thick part in the circumferential direction of the parison, and after molding, marks are made in the longitudinal direction of the molded product. Measure the wall thickness at the marked position and compare the measurement result with the target wall thickness value input in advance in the control device to determine the next nozzle slit width of the mandrel and moving block so that the difference in wall thickness will be small. Based on the results, the nozzle slit widths of the mandrel and the moving block are individually adjusted, and the length of the parison is detected and the length signal is input to the control device, and the parison length is compared with the target parison length input in advance to the control device. In comparison, if the nozzle slit is set at a constant injection amount and the parison length is long, the parison is made thicker over the entire length, and vice versa, the positions of the mandrel and moving block are adjusted overall so that the difference in length is reduced. The present invention relates to a plastic blow molding method characterized by adjusting the plastic blow molding method.

［作用］ 従つて、本発明では、マンドレルと移動ブロツ
クによる周方向のギヤツププロフイルが検出さ
れ、それにより各々のギヤツプによつて成形され
るパリソンが目標の肉厚となるようにマンドレル
及び移動ブロツクが自動的に調整され、且つパリ
ソンの長さが検出され、その検出値に基づいて前
記マンドレル及び移動ブロツクの位置が全体的に
調整されることにより、パリソン長さが目標長さ
になるように自動的に制御される。[Operation] Therefore, in the present invention, the gap profile in the circumferential direction due to the mandrel and the moving block is detected, and the mandrel and the moving block are thereby detected so that the parison formed by each gap has the target wall thickness. The block is automatically adjusted, the length of the parison is detected, and the positions of the mandrel and moving block are adjusted as a whole based on the detected value, so that the length of the parison becomes the target length. automatically controlled.

［実施例］ 以下本発明の一実施例を図面を参照しつつ説明
する。[Example] An example of the present invention will be described below with reference to the drawings.

第１図は本発明の一例を示すもので、前記第２
図と同一の符号を付した部分は同一物を表わして
いる。 FIG. 1 shows an example of the present invention, in which the second
Parts with the same reference numerals as those in the figures represent the same parts.

図示するように、ヘツド２の下端周方向所要位
置には、アクチエータ１６の作動によつて半径方
向に移動することにより、スリツト幅を調整して
パリソン１に厚肉部g1，g2を形成し得るようにし
た移動ブロツク１７を備えており、該移動ブロツ
ク１７の下側位置において、パリソン１の縦方向
に所要の間隔でマーク１２を付けるマーカー１３
を設けている。更に、移動ブロツク１７が設けら
れないパリソン１の定常肉厚部Ｇにも従来と同様
にマーカー１３（図示せず）を設けるようにして
いる。又、上記アクチエータ１６及びマーカー１
３、並びにマンドレル４の昇降を行うサーボシリ
ンダー３は、制御装置２４からの制御信号によつ
て作動されるようになつている。 As shown in the figure, thick portions g 1 and g 2 are formed in the parison 1 at predetermined positions in the circumferential direction of the lower end of the head 2 by adjusting the slit width by moving in the radial direction by actuating the actuator 16. At the lower position of the moving block 17, markers 13 are placed to mark marks 12 at required intervals in the longitudinal direction of the parison 1.
has been established. Furthermore, a marker 13 (not shown) is provided in the constant thick part G of the parison 1 where the moving block 17 is not provided, as in the conventional case. Moreover, the actuator 16 and the marker 1
3 and the servo cylinder 3 for raising and lowering the mandrel 4 are operated by control signals from a control device 24.

又、パリソン１の下端部位置にはパリソン１の
長さを検出するための光電管等からなる長さ検出
器が設けられている。 Further, a length detector made of a phototube or the like is provided at the lower end of the parison 1 to detect the length of the parison 1.

上記において、長さ検出器１８からの長さ信号
１９、射出プランジヤー７位置の検出器９からの
プランジヤー位置信号２０、及び肉厚測定器１４
からの肉厚信号２１が前記制御装置２４に入力さ
れ、該制御装置２４に定常部の肉厚Ｇ、厚肉部の
肉厚g1，g2がパリソンの長さに対応して表示され
るようになつている。 In the above, the length signal 19 from the length detector 18, the plunger position signal 20 from the detector 9 at the injection plunger 7 position, and the wall thickness measuring device 14
The wall thickness signal 21 is input to the control device 24, and the wall thickness G of the steady portion and the wall thicknesses g 1 and g 2 of the thick portion are displayed on the control device 24 in correspondence with the length of the parison. It's becoming like that.

又、前記制御装置２４には、定常肉厚部Ｇの目
標肉厚及び厚肉部g1，g2の目標肉厚を指示する目
標肉厚信号２２、及びパリソン１の目標長さを指
示する目標長さ信号２３が入力されている。 Further, the control device 24 is provided with a target thickness signal 22 that instructs the target thickness of the steady thick portion G, the target thickness of the thick portions g 1 and g 2 , and a target length of the parison 1. A target length signal 23 is input.

従つて、上記により制御装置２４において、試
成形品１５のマーキングされた部分の肉厚の目標
値２２と実施値２１の比からその場所の新たなス
リツト幅を求める作業を、パリソン１の周方向に
行わしめて、周方向のギヤツププロフイルを求
め、且つこれをパリソン１の長手方向所要区間毎
に求め、これに基づいて、サーボシリンダー３の
サーボバルブ１１及びアクチエータ１６の調整を
行つて、定常肉厚部Ｇ及び厚肉部g1，g2の厚さが
目標値になるように自動的に制御する。 Therefore, the control device 24 performs the task of determining a new slit width at that location from the ratio of the target value 22 and actual value 21 of the wall thickness of the marked portion of the sample molded product 15 in the circumferential direction of the parison 1. Then, the gap profile in the circumferential direction is determined, and this is determined for each required section in the longitudinal direction of the parison 1. Based on this, the servo valve 11 and actuator 16 of the servo cylinder 3 are adjusted to maintain a steady state. The thicknesses of the thick portion G and the thick portions g 1 and g 2 are automatically controlled to the target values.

更に、長さ検出器１８によつてパリソン１の長
さを検出し、その長さ信号１９を制御装置２４に
入力しているので、同時にパリソン１の長さも目
標値２３になるように、前記サーボシリンダー３
及びアクチエータ１６を制御してパリソン１の周
方向の厚み全体を調整する。 Furthermore, since the length of the parison 1 is detected by the length detector 18 and the length signal 19 thereof is inputted to the control device 24, the length of the parison 1 is also adjusted to the target value 23 at the same time. Servo cylinder 3
and controls the actuator 16 to adjust the entire circumferential thickness of the parison 1.

尚、本発明は上記実施例にのみ限定されるもの
ではなく、移動ブロツク１７はノズルスリツトを
構成する材料と一体でその部分の弾性変形により
移動効果を出すもの等も含むこと、厚肉部の成形
方式、マーカーによるマーキング方式、パリソン
の長さ検出方式等を種々変更し得ること、その他
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、等は勿論である。 It should be noted that the present invention is not limited to the above-mentioned embodiments, and may also include a moving block 17 that is integral with the material constituting the nozzle slit and produces a moving effect by elastic deformation of that part, and that it may be possible to form a thick portion. It goes without saying that the method, marking method using markers, parison length detection method, etc. may be changed in various ways, and other changes may be made within the scope of the gist of the present invention.

［発明の効果］ 上記したように、本発明のプラスチツク吹込成
形方法によれば、 (i) 定常肉厚部と厚肉部を有したパリソンの成形
において、周方向のギヤツププロフイルを検出
してその検出値に基づき、パリソンの周方向の
肉厚を自動的に制御できるので、煩雑な設定作
業を省略して、制御性の向上を図ることができ
る。[Effects of the Invention] As described above, according to the plastic blow molding method of the present invention, (i) the gap profile in the circumferential direction can be detected in molding a parison having a constant thickness portion and a thick portion; Since the thickness of the parison in the circumferential direction can be automatically controlled based on the detected value, complicated setting work can be omitted and controllability can be improved.

(ii) パリソンの長さを検出し、その長さ信号に基
づいてマンドレル及び移動ブロツクの位置を調
整することにより、周方向の肉厚全体を調整し
てパリソンの長さを自動的に制御することがで
きる。(ii) By detecting the length of the parison and adjusting the position of the mandrel and moving block based on the length signal, the length of the parison is automatically controlled by adjusting the entire wall thickness in the circumferential direction. be able to.

(iii) 成形品の肉厚制御精度が向上し、且つ連続転
中の製品肉厚分布とノズルスリツト幅設定パタ
ーンの比較検討と変更が容易にできるため、品
質管理性が向上する。(iii) The accuracy of controlling the wall thickness of the molded product is improved, and the product wall thickness distribution during continuous rolling and the nozzle slit width setting pattern can be easily compared and changed, so quality control is improved.

(iv) 成形品各部の肉厚測定を成形品を置く治具の
工夫等により自動化できるので、成形作業の一
貫したコンピユーター利用によるオンライン化
を図ることができる。(iv) Since the wall thickness measurement of each part of the molded product can be automated by devising a jig for placing the molded product, it is possible to carry out online molding operations through consistent use of a computer.

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

第１図は本発明の一実施例を示す説明図、第２
図は従来の一例を示す説明図である。 １はパリソン、２はヘツド、３はサーボシリン
ダー、４はマンドレル、５はノズルスリツト、７
は射出プランジヤー、９は検出器、１３はマーカ
ー、１４は肉厚設定器、１５は試成形品、１６は
アクチエータ、１７は移動ブロツク、１８は長さ
検出器、２２は目標肉厚信号、２３は目標長さ信
号、２４は制御装置を示す。 FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram showing a conventional example. 1 is the parison, 2 is the head, 3 is the servo cylinder, 4 is the mandrel, 5 is the nozzle slit, 7
1 is an injection plunger, 9 is a detector, 13 is a marker, 14 is a thickness setting device, 15 is a sample molded product, 16 is an actuator, 17 is a moving block, 18 is a length detector, 22 is a target thickness signal, 23 indicates a target length signal, and 24 indicates a control device.

Claims (1)

【特許請求の範囲】[Claims] １ マンドレルの昇降による定常肉厚部の制御と
移動ブロツクの半径方向の移動による厚肉部の制
御を行うようにしたプラスチツク吹込成形方法に
おいて、パリソン周方向における定常肉厚部と厚
肉部の複数個所に、縦方向に所要の間隔でマーカ
によりマークを付け、成形後成形品の前記縦方向
のマークを付した位置の肉厚を測定し、該測定結
果を制御装置において予め入力された目標肉厚値
と比較して肉厚の差が小さくなるよう次回のマン
ドレル及び移動ブロツクのノズルスリツト幅を求
め、その結果によりマンドレル及び移動ブロツク
のノズルスリツト幅を各個に調整し、更にパリソ
ンの長さを検出してその長さ信号を前記制御装置
に入力し、制御装置に予め入力されている目標パ
リソン長さと比較して、長さの差が小さくなるよ
うに前記マンドレル及び移動ブロツクの位置を全
体的に調整することを特徴とするプラスチツク吹
込成形方法。1 In a plastic blow molding method in which a steady thick part is controlled by raising and lowering a mandrel and a thick part is controlled by moving a moving block in the radial direction, the steady thick part and a plurality of thick parts in the circumferential direction of the parison are controlled. Marks are placed at required intervals in the vertical direction using markers, and after molding, the wall thickness of the molded product at the positions where the marks are placed in the vertical direction is measured. The next nozzle slit width of the mandrel and moving block is determined so that the difference in wall thickness is small compared to the thickness value. Based on the results, the nozzle slit width of the mandrel and moving block is individually adjusted, and then the length of the parison is detected. input the length signal into the control device, compare it with a target parison length inputted in advance into the control device, and adjust the positions of the mandrel and the moving block as a whole so that the difference in length becomes small. A plastic blow molding method characterized by:
JP60170165A 1985-08-01 1985-08-01 Plastic blow molding process Granted JPS6230020A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP60170165A JPS6230020A (en) 1985-08-01 1985-08-01 Plastic blow molding process
SE8602466A SE8602466L (en) 1985-08-01 1986-05-30 BLASFORMINGSMETOD
IT20626/86A IT1204887B (en) 1985-08-01 1986-05-30 MOLDING PROCESS FOR PLASTIC BLOWING MATERIALS
KR1019860004335A KR910000498B1 (en) 1985-08-01 1986-06-02 Thickness controlling method for parison in plastic blow molding process
DE19863619113 DE3619113A1 (en) 1985-08-01 1986-06-06 PLASTIC BLOW MOLDING
CN198686104270A CN86104270A (en) 1985-08-01 1986-06-25 The blow molding method of plastics
GB8618580A GB2178361B (en) 1985-08-01 1986-07-30 Blow moulding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60170165A JPS6230020A (en) 1985-08-01 1985-08-01 Plastic blow molding process

Publications (2)

Publication Number Publication Date
JPS6230020A JPS6230020A (en) 1987-02-09
JPH035294B2 true JPH035294B2 (en) 1991-01-25

Family

ID=15899886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60170165A Granted JPS6230020A (en) 1985-08-01 1985-08-01 Plastic blow molding process

Country Status (7)

Country Link
JP (1) JPS6230020A (en)
KR (1) KR910000498B1 (en)
CN (1) CN86104270A (en)
DE (1) DE3619113A1 (en)
GB (1) GB2178361B (en)
IT (1) IT1204887B (en)
SE (1) SE8602466L (en)

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JPS5764524A (en) * 1980-10-07 1982-04-19 Ishikawajima Harima Heavy Ind Co Ltd Device for controlling thickness of parison

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IT1204887B (en) 1989-03-10
GB2178361B (en) 1989-07-26
KR870001920A (en) 1987-03-28
SE8602466D0 (en) 1986-05-30
CN86104270A (en) 1987-01-28
IT8620626A0 (en) 1986-05-30
GB8618580D0 (en) 1986-09-10
DE3619113A1 (en) 1987-02-12
JPS6230020A (en) 1987-02-09
SE8602466L (en) 1987-02-02
KR910000498B1 (en) 1991-01-26
DE3619113C2 (en) 1990-10-25
GB2178361A (en) 1987-02-11

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