JPH0483733U - - Google Patents

Info

Publication number
JPH0483733U
JPH0483733U JP1990129738U JP12973890U JPH0483733U JP H0483733 U JPH0483733 U JP H0483733U JP 1990129738 U JP1990129738 U JP 1990129738U JP 12973890 U JP12973890 U JP 12973890U JP H0483733 U JPH0483733 U JP H0483733U
Authority
JP
Japan
Prior art keywords
pressure
extrusion
shoe
molding machine
extrusion 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.)
Pending
Application number
JP1990129738U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP1990129738U priority Critical patent/JPH0483733U/ja
Publication of JPH0483733U publication Critical patent/JPH0483733U/ja
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
    • B29C48/25—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/924—Barrel or housing
    • 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
    • B29C2948/92514—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
    • 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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

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

第１図は実施の一例の回路図、第２図は押出成
形機の押出ダイス部分の略示断面図、第３図は第
２図中−線位置における背圧シユーの断面図
、第４図は別の実施例たる背圧シユーの第３図と
同様の断面図、第５図は本考案に係る背圧制御装
置を用いた場合の押出し成形の１サイクル中の押
出しシリンダー内の圧力変化を示す線図、第６図
は背圧を作用させない場合の押出し成形の１サイ
クル中の押出シリンダー内の圧力変化を示す線図
、第７図は従来の背圧装置を用いた場合の連続押
出成形工程中の押出シリンダー内の圧力変化を示
す線図、第８図は、第７図に示すもののうちの押
出し成形の１サイクルにおける押出シリンダー内
の圧力変化を示す線図である。 １……押出成形機、２……押出ダイス、３……
出口部、５……固定シユー、７……可動シユー、
８……流体圧シリンダー装置、９……プランジヤ
ー、１２……成形品、１８……流体流量制御弁、
１９……制御回路、２０……押出シリンダー、２
１……検出器、２２……Ａ／Ｄ変換器、２３……
演算器（ＣＰＵ）、２４……Ｄ／Ａ変換器、２５
……増幅器、Ｏ−Ｏ……中心軸線。 Fig. 1 is a circuit diagram of an example of implementation, Fig. 2 is a schematic sectional view of the extrusion die portion of the extrusion molding machine, Fig. 3 is a sectional view of the back pressure shoe at the - line position in Fig. 2, and Fig. 4 is a cross-sectional view similar to FIG. 3 of another embodiment of the back pressure shoe, and FIG. Figure 6 is a diagram showing the pressure change inside the extrusion cylinder during one cycle of extrusion molding when no back pressure is applied, and Figure 7 is a diagram showing continuous extrusion molding using a conventional back pressure device. FIG. 8 is a diagram showing pressure changes in the extrusion cylinder during one cycle of extrusion molding shown in FIG. 7. 1... Extrusion molding machine, 2... Extrusion die, 3...
Exit part, 5... fixed shoe, 7... movable shoe,
8... Fluid pressure cylinder device, 9... Plunger, 12... Molded product, 18... Fluid flow control valve,
19... Control circuit, 20... Extrusion cylinder, 2
1...Detector, 22...A/D converter, 23...
Arithmetic unit (CPU), 24...D/A converter, 25
...Amplifier, O-O... Central axis line.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 合成樹脂の押出成形機の押出ダイスの出口部に
、ダイスの中心軸線に沿つて２分割された背圧シ
ユーが直結されており、該背圧シユーの一方は機
台側に固定された固定シユーとされ、他方は流体
圧シリンダー装置のプランジヤーに結合された可
動シユーとされ、固定シユーに対し、半径方向に
接離可能に組み付けられていると共に、前記流体
圧シリンダー装置の流体流量制御弁の制御回路に
は、前記押出成形機の押出シリンダー内の合成樹
脂の圧力の検出器と、該検出器の検出値と、予め
入力されている設定圧力とを比較演算して、前記
固定シユーと可動シユーとの間の挟圧力を、前記
押出シリンダー内を前記設定圧力に維持するのに
必要な圧力とするために必要な流体制御信号を出
力する演算器とが組み込まれている押出成形機の
背圧制御装置。 A back pressure shoe divided into two parts along the central axis of the die is directly connected to the outlet of the extrusion die of a synthetic resin extrusion molding machine, and one of the back pressure shoes is connected to a fixed shoe fixed to the machine base. and the other is a movable shoe connected to the plunger of the fluid pressure cylinder device, which is assembled to the fixed shoe so as to be able to move toward and away from it in the radial direction, and which controls the fluid flow rate control valve of the fluid pressure cylinder device. The circuit includes a detector for the pressure of the synthetic resin in the extrusion cylinder of the extrusion molding machine, and compares and calculates the detected value of the detector with a set pressure that has been inputted in advance. back pressure of an extrusion molding machine incorporating a computing unit that outputs a fluid control signal necessary to maintain the squeezing force between the extrusion cylinder and the set pressure at the set pressure; Control device.
JP1990129738U 1990-11-30 1990-11-30 Pending JPH0483733U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990129738U JPH0483733U (en) 1990-11-30 1990-11-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990129738U JPH0483733U (en) 1990-11-30 1990-11-30

Publications (1)

Publication Number Publication Date
JPH0483733U true JPH0483733U (en) 1992-07-21

Family

ID=31877127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990129738U Pending JPH0483733U (en) 1990-11-30 1990-11-30

Country Status (1)

Country Link
JP (1) JPH0483733U (en)

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