CN1035472C - Production line for extruding pipe and wire materials - Google Patents

Production line for extruding pipe and wire materials Download PDF

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Publication number
CN1035472C
CN1035472C CN92101092A CN92101092A CN1035472C CN 1035472 C CN1035472 C CN 1035472C CN 92101092 A CN92101092 A CN 92101092A CN 92101092 A CN92101092 A CN 92101092A CN 1035472 C CN1035472 C CN 1035472C
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China
Prior art keywords
machine
control
production line
pipes
sebific duct
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Expired - Fee Related
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CN92101092A
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Chinese (zh)
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CN1075908A (en
Inventor
徐光�
李凤翔
李新秋
翟长勇
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Tsinghua University
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Tsinghua University
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Priority to CN92101092A priority Critical patent/CN1035472C/en
Publication of CN1075908A publication Critical patent/CN1075908A/en
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    • 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
    • B29C2948/92504—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
    • B29C2948/9259—Angular velocity
    • 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
    • B29C2948/92619—Diameter or circumference
    • 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
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/92923—Calibration, after-treatment or cooling 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
    • B29C2948/92933—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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92971—Fluids, e.g. for temperature control or of environment

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

Abstract

The present invention relates to a production line of pipes and wire materials, which belongs to the production of molding materials. The production line is an automatic production line for producing rubber pipes and plastic pipes with flexible cores. Four closed-loop control systems are arranged on the whole production line, and comprises outer diameter measure and control for the rubber pipes, pressure measure and control for an extruding machine, curling and automatic row displaying, leading-out and tension control, and cooling water temperature and control. The production line of pipes and wire materials has the automatic measurement of the pipes and automatic regulation to guarantee produced products in a qualified range.

Description

The production method that a kind of tubing extrudes
The invention belongs to the production method of moulding material, relate in particular to the extrusion production of rubber tube, plastic tube and wire rod.
Along with development and national economy, industrial demand to various sebific ducts is increasing.But because China's glue tube industrial level is very backward, so be that product quality or output all can not meet the demands far away.At present, the production of China's sebific duct only is equivalent to developed country's level in five sixties, and most factories still adopt old hard core method production technology.This mode of production exists a lot of shortcomings.Mainly be: 1. can only lean on manual operation, not only labour intensity is big, and production efficiency is low, and the difficult quality guarantee of product.2. production length has only 2 meters, no longer than 10 meters.The cutting loss of short sebific duct is very big, and general utilization only is about 70%, wastes very surprising.3. in process of production, need frequent accent machine, not only adjusting machine time is long, and wastes raw material, and therefore causes the very big energy and raw-material waste.
Early seventies, the continuous production of the sebific duct that abroad just begins one's study, soft core method production technology is that new road has been opened up in sebific duct production serialization.This production method not only be suitable for producing big length sebific duct (＞300m), production efficiency height, good product quality, and the automation of being convenient to produce.But external production line costs an arm and a leg, and to various conditional request strictnesses, is not suitable for domestic popularization simultaneously.The object of the present invention is to provide a kind of soft core method sebific duct automation that is suitable for China's national situation to extrude production method.This method has designed four closed-loop control systems, the tension force control and cooling water temperature measurement and the control that comprise sebific duct outside diameter measuring and control, cross-head pressure measxurement and control, derive and curl.These four closed-loop system collaborative works under the monitoring that places the CPU on the master console have realized the increasingly automated of whole production line, and easy to utilize, have the good economic benefits prospect.
Production method of the present invention: adopt derivation machine (1) to derive soft core, derivation tension force through the constant soft core of tension regulator A (2), with extruder (5) to this soft core encapsulate, with Laser Measuring through instrument (6) non-cpntact measurement caliber, and by hauling machine (3) before and after the computer control, (8) speed, make the diameter of extruding pipe material stable, this tubing separant coating after water cooling, machine (11) is collected by being curled behind tension regulator (10) B, it is characterized in that: laser diameter measuring instrument (6) is to send light beam by laser instrument, become directional light by condenser lens, this directional light is divided into two bundles by semi-transparent semi-reflecting lens, scans measured object and grating simultaneously, obtains measured value, and show by charactron, with computer this measured value and standard value are compared, obtain PID (PID) control signal, this signal is directly delivered to hauling machine (3), (8) frequency converter in, hauling machine synchronous operation before and after making, and make the front haulage motor speed be slightly less than the rear haulage motor speed.
The realization of extrusion production technology of the present invention is: adopt derivation machine, tension regulator, front and back hauling machine, cold feed extruder, chilled water unit, separant coating device, crimping device.
Behind the derivation machine and before the crimping machine, be provided with tension regulator respectively, record sebific duct tension force and provide the rotating speed that control signal is controlled derivation machine and crimping machine by tension regulator, in the process that derives and curl, keep permanent tension state to guarantee soft core and sebific duct.Be provided with two hauling machines respectively in the front and back of extruder---front haulage machine and rear haulage machine.Their synchronous operation under the control of laser diameter measuring instrument, and the length velocity relation between them can be regulated arbitrarily according to the needs of production technology.Laser diameter measuring instrument places near the head of extruder, so that measure to extrude the external diameter of sebific duct as early as possible and control mode according to the rules provides control signal.On the head of extruder, be provided with pressure sensor, head pressure is carried out on-line measurement, particularly utilize this signal that the screw speed of extruder is controlled, constant to guarantee head pressure.Chilled water unit has adopted refrigeration machine to add the working method of recirculated water.Behind chilled water unit, be provided with the separant coating device.All speed change systems on the production line have all adopted " alternating current generator adds frequency converter " mode of speed regulation.
Description of drawings:
Fig. 1 is a sebific duct automatic assembly line schematic diagram;
Fig. 2 is a process chart.
[1] derivation machine, [2] tension regulator A, [3] front haulage machine, [4] master console, [5] extruder, [6] laser diameter measuring instrument, [7] chilled water unit, [8] rear haulage machine, [9] separant coating device, [10] tension regulator B, [11] crimping machine and automatic row's pendulum.
Technical solution of the present invention is described in further detail by reference to the accompanying drawings:
Derive soft core by derivation machine [1], the derivation speed of soft core is controlled by tension regulator A, tension regulator A[2] tension value and the standard tension value that measures compared, result relatively processes through special circuit and provides control signal, this control signal is directly inputted to derivation machine Frequency Converter Control end, make frequency converter change frequency to change the rotating speed of alternating current generator in the derivation machine, reach the purpose of control derivation machine rotating speed, guarantee constant tension.
Soft core is by through tension regulator A[2] after the derivation machine of control derives, enter the T-shaped head of extruder through front haulage machine [3], out after soft core wrapped a layer sizing, form sebific duct. What of gel quantity directly affect the sebific duct thickness, for the gel quantity that makes extruder keeps stablizing constant, be provided with pressure closed loop control at head, measure head pressure by pressure sensor, provide controlled quentity controlled variable by special-purpose computer calculating, control extruder screw rotating speed guaranteeing the head constant pressure, thereby has guaranteed that gel quantity stablizes constant.
Sebific duct from extruder [5] out afterwards through laser diameter measuring instrument [6], this laser diameter measuring instrument [6] can carry out online non-cpntact measurement to sebific duct, and directly show measured diameter value by charactron, the internal proprietary computer can compare measured value and standard value and obtain PID (PID) control signal, this signal can be controlled hauling machine and change the sebific duct pace, and it is large that speed becomes, and the sebific duct diameter reduces, speed diminishes, and the sebific duct diameter increases.
Entering chilled water unit [7] behind the sebific duct process laser diameter measuring instrument [6] cools off, this chilled water unit [7] has adopted refrigeration machine to add the recirculated water mode, by temperature sensor water temperature is measured, controller will be opened refrigeration machine and make water for cooling when the super upper limit of water temperature, guarantee temperature deviation be no more than ± 2 ℃.
By cooling off the back sebific duct by rear haulage machine [8] traction, it is to avoid causing distortion owing to stretching that two hauling machines are placed in front and back.Before and after hauling machine be synchronous operation under the control of laser diameter measuring instrument [6], and restriction is arranged each other, front haulage speed is slightly less than rear haulage speed, rear haulage does not start, front haulage can not start, what use in hauling machine is that alternating current generator adds frequency conversion speed-adjusting system, and this system has adopted microcomputer control Sine Wave Pulse Width Modulation and high power transistor inversion transformation technique, and it and laser diameter measuring instrument [6] constitute the control closed loop and guaranteed that sebific duct is qualified products.
The sebific duct that is pulled out by rear haulage machine [8] is coated with one deck interleaving agent by separant coating device [9], and this device adopts the spray mode, and compressed air blowing dry device is housed, by adjusting compressed-air actuated air quantity, adjust the thickness that is coated in separation layer on the sebific duct.
Through the sebific duct after interleaving agent device [9] by tension regulator B[10] after the machine [11] that is curled collect, the speed of collection (crimping machine rotating speed just) is by tension regulator control, its principle is identical with the relation of derivation machine with the front tension regulator.
This method can be operated control to all equipment in the production process on master console [4], and the various running parameters of demonstration line of production technology, recorder can be write down the situation of change of production process cross-head pressure and sebific duct external diameter automatically, CPU is monitored in real time to the working condition of each subsystem, guarantees the whole production line coordinated operation.The each several part device all has the function of operation control respectively simultaneously.
The advantage of this production method:
1. owing to adopt production method of the present invention, become soft core, improved operating efficiency greatly, reduced labour intensity by hard core.
2. employing the present invention, production technology is maintained fixed tension force, makes production process extruder extruding pipe material diameter stable, has guaranteed product quality.
3. design tension regulator and controlled derivation and curling respectively, formed closed-loop control, guaranteed sebific duct constant-tension in the production process, guaranteed the stable of production process.
4. increased head pressure control and guaranteed that gel quantity is constant, for laying a good foundation by hauling machine control sebific duct diameter.
5. laser diameter measuring instrument is placed near the head, and the sebific duct external diameter of on-line measurement extrusion can be controlled the forward and backward speed of leading after the measurement result process internal proprietary Computer Processing as soon as possible, feedback information is fast like this, the control procedure sensitivity, the control best results has guaranteed the sebific duct quality.If production control is carried out under lower deviation, make product can guarantee to save material in a large number again into qualified.
6. cooling water adopts refrigeration machine to add the recirculated water mode, can control the temperature of water automatically, has guaranteed the effective cooling to sebific duct, and has saved water greatly.
7. two hauling machines before and after being provided with change guaranteeing under the situation of hauling machine velocity variations the variation that sebific duct can not be influenced by pulling force synchronously.
8. various piece is worked in coordination, and makes whole production line have higher automaticity.Effectively controlled the quality of product, improved labor productivity, brought bigger economic benefit to national economy.
Embodiment 1:
1. described laser diameter measuring instrument is to send light beam by laser instrument to become directional light by common condenser lens, this bundle directional light is divided into two bundles by a slice semi-transparent semi-reflecting lens, a branch of scanning measured object obtains gate signal, another bundle raster obtains grating signal, detects the diameter value that the grating number has just obtained object with gate signal.Technical parameter sees Table 1.
Table 1 QHJ-50C type laser diameter measuring instrument technical parameter
Project Index
Measurement category 0.1-50mm
Resolution ratio 0.01mm
The degree of accuracy ＜0.02mm
Scan frequency 200 times/S
The numeral display frequency 2-10 time/S
Control mode PID
Output signal 0-100CV
2. described tension regulator is to adopt the reacting condition wire rod of the magneto sensor inductive magnetic steel anglec of rotation situation of dangling, and realizes the adjusting of tension force by computer PID s operation control rotating speed of motor.What wherein magneto sensor adopted is the Hall element of G910603-67 model, and what magnet steel adopted is the cylinder magnet steel of high 15mm.
3. described derivation and crimping device, what the front and back hauling machine all adopted is that alternating current generator adds frequency convertor system, this system has adopted microcomputer control Sine Wave Pulse Width Modulation and high power transistor inversion transformation technique.Wherein the alternating current generator of derivation and crimping device is 0.75 kilowatt, frequency converter model SVS152.The important technological parameters such as the table 2 of hauling machine.
Table 2 hauling machine important technological parameters
Project Index
Bandwidth 95mm
Drawing length 600mm
Operating rate 0-35m/mm
Speed stability ＜10 -3
Power 2.2KW
The belt gap 0-150mm
4. long 4 meters of described chilled water unit, cooling range be at 15 ℃, ± 2 ℃.

Claims (1)

1, the production method that a kind of tubing extrudes, derive soft core by derivation machine (1), derivation tension force through the constant soft core of tension regulator A (2), with extruder (5) to this soft core encapsulate, with Laser Measuring through instrument (6) non-cpntact measurement caliber, and by hauling machine (3) before and after the computer control, (8) speed, make the diameter of extruding pipe material stable, this tubing separant coating after water cooling, machine (11) is collected by being curled behind the tension regulator B (10), it is characterized in that: laser diameter measuring instrument (6) is to send light beam by laser instrument, becomes directional light by condenser lens, and this directional light is divided into two bundles by semi-transparent semi-reflecting lens, scan measured object and grating simultaneously, obtain measured value, and show, this measured value and standard value are compared with computer by charactron, obtain pid control signal, this signal is directly delivered to hauling machine (3), (8) frequency converter in, hauling machine synchronous operation before and after making, and make the front haulage motor speed be slightly less than the rear haulage motor speed.
CN92101092A 1992-02-27 1992-02-27 Production line for extruding pipe and wire materials Expired - Fee Related CN1035472C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN92101092A CN1035472C (en) 1992-02-27 1992-02-27 Production line for extruding pipe and wire materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN92101092A CN1035472C (en) 1992-02-27 1992-02-27 Production line for extruding pipe and wire materials

Publications (2)

Publication Number Publication Date
CN1075908A CN1075908A (en) 1993-09-08
CN1035472C true CN1035472C (en) 1997-07-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1308134C (en) * 2005-07-07 2007-04-04 哈尔滨工业大学星河实业有限公司 Steel band reinforced plastic drainpipe and method and apparatus for manufacturing the same

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CN1073922C (en) * 1997-12-31 2001-10-31 四川联合大学 Prepn. method and appts. for self-strengthening plastic pipe material
CN1307036C (en) * 2003-12-31 2007-03-28 刘津平 Control method for improving quality of extrusion injection shaping product
CN102248009B (en) * 2011-01-15 2014-07-30 合肥市百胜科技发展股份有限公司 Cooling device for diameter measuring instrument
CN102248008B (en) * 2011-01-15 2013-07-10 合肥市百胜科技发展股份有限公司 Cooling device for diameter measuring instrument
CN102729446A (en) * 2011-04-14 2012-10-17 王东奎 Linkage production method and device for rubber hose extrusion
CN102729500B (en) * 2011-04-14 2017-10-20 王东奎 A kind of spiral rubber hose linkage-production method and its device
CN102423769A (en) * 2011-10-17 2012-04-25 江苏巨力钢绳有限公司 Online wire diameter measuring device
CN103632770A (en) * 2013-11-14 2014-03-12 无锡华昊电器股份有限公司 Cable wire diameter automatic regulating system
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CN103950771A (en) * 2014-05-04 2014-07-30 杭州电子科技大学 Tension control unit and control method thereof in thin film production
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CN108946289A (en) * 2018-08-08 2018-12-07 河北金星科技有限公司 A kind of plug detects winding assembly line automatically
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1308134C (en) * 2005-07-07 2007-04-04 哈尔滨工业大学星河实业有限公司 Steel band reinforced plastic drainpipe and method and apparatus for manufacturing the same

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