EP2010367A1 - Procédé de commande d'une installation de traitement de matière plastique et installation de traitement de matière plastique - Google Patents

Procédé de commande d'une installation de traitement de matière plastique et installation de traitement de matière plastique

Info

Publication number
EP2010367A1
EP2010367A1 EP07721890A EP07721890A EP2010367A1 EP 2010367 A1 EP2010367 A1 EP 2010367A1 EP 07721890 A EP07721890 A EP 07721890A EP 07721890 A EP07721890 A EP 07721890A EP 2010367 A1 EP2010367 A1 EP 2010367A1
Authority
EP
European Patent Office
Prior art keywords
volume
volume control
screen
control
melt
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.)
Withdrawn
Application number
EP07721890A
Other languages
German (de)
English (en)
Inventor
Manfred Stark
Harald Pohl
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.)
Maag Pump Systems GmbH
Original Assignee
Maag Pump Systems Textron GmbH
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 Maag Pump Systems Textron GmbH filed Critical Maag Pump Systems Textron GmbH
Publication of EP2010367A1 publication Critical patent/EP2010367A1/fr
Withdrawn legal-status Critical Current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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
    • 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
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
    • B29C48/37—Gear pumps
    • 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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
    • 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
    • B29C48/50—Details of extruders
    • B29C48/69—Filters or screens for the moulding material
    • B29C48/691—Arrangements for replacing filters, e.g. with two parallel filters for alternate use
    • B29C48/6912—Arrangements for replacing filters, e.g. with two parallel filters for alternate use the filters being fitted on a single rectilinearly reciprocating slide
    • 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
    • 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
    • B29C2948/92409—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
    • B29C2948/92323—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
    • B29C2948/92514—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
    • B29C2948/9258—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
    • B29C2948/92657—Volume or quantity
    • 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
    • B29C2948/92885—Screw or gear
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/9299—Treatment of equipment, e.g. purging, cleaning, lubricating or filter exchange
    • 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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/03—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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles

Definitions

  • the present invention relates to a method for controlling a plastics processing plant and a corresponding plant, wherein the plant comprises at least one feed device for a polymeric melt, in particular an extruder, a conveyor, in particular a melt pump, a filter device and a tool.
  • Plastics are processed, for example, in extrusion lines, wherein an extruder is used as a feeder, by means of which a downstream tool is supplied continuously and uniformly with a polymer melt of plastic.
  • delivery devices can be used as volumetric delivery units to produce a constant volume flow. These are needed to produce a product within given tolerances.
  • Operation with a conveying device, for example a gear pump offers advantages over operation without a pump, since the operating stability and handling of the system can be improved.
  • Suitable products of a continuous extrusion process are films, tubes, profiles, flat films, plates and the like. Demands made on the purity of the plastic melt, the melt is passed through a filter device which is arranged between the extruder and the tool.
  • the filter device can result in a considerable, partially non-linear pressure drop, which often reduces the delivery pressure applied by the extruder to such an extent that an additional delivery device is arranged in the melt stream which provides sufficient melt pressure for the tool provides.
  • two different types of screen changers for continuous operation can be used as filter means, which during operation of the system are capable of changing, in particular exchanging or cleaning, the soiled filters, which are also referred to as screens to interrupt the flow of material.
  • a screen changer When processing non-soiled or only slightly soiled virgin material, a screen changer is used, which allows an exchange of soiled sieves during continuous production, which may also involve sieve packets (DE 35 27 173 C1).
  • the melt stream is split, for example, into two streams (channels) on the material inlet side and directed to two sieves. After flowing through the sieves, the two separate streams of the polymer melt are recombined to exit the material.
  • a screen-carrying screen bolt is first pushed axially out of the housing by means of a hydraulic cylinder or manually. As a result, the corresponding channel is shut off at the same time and production continues on the other sieve. After the the screen bolt moved back into the housing.
  • a continuous backflush screen changer can be used.
  • This application benefits from a self-cleaning backwash system.
  • the contamination from the sieve or the sieve pack is washed out with a backward flow of the filtered melt by diverting part of the filtered melt and leading it to the back of the sieve. This dissolves the contamination from the sieve or sieve package and is transported outside.
  • the backwashing process can be carried out repeatedly until Siebverschl foundation, which has a high life of the sieves result.
  • continuous operation is possible if the melt stream is split into at least two streams (channels) and directed to at least two screens or screen packages.
  • Such a device for filtering a fluid is evident from EP 0 798 098 Bl.
  • Backwashing sieve changers are known, to which a reservoir is connected, which is capable of receiving melt be designed in the manner of a hydraulic accumulator.
  • a small partial flow of the filtered melt is diverted into the reservoir until it is filled.
  • the derived partial flow in relation to the main flow must be kept very low in order to disturb the main stream of melt when filling the reservoir little and to ensure the most constant melt main stream can.
  • For backwashing a screen no melt is removed from the production process. Rather, the back of the sieve to be backwashed is connected to the reservoir, which discharges stored melt, which flows through the sieve and cleans it. In this way, the reservoir can compensate for a melt loss during backwashing.
  • the present invention is based on the object
  • the method according to the invention serves to control a continuous plastics-processing installation, the installation having at least one feed device for a polymeric melt, in particular an extruder, a conveying device, in particular a melt pump, a filter device and a tool.
  • Suitable feed devices are, for example, screw extruders or twin-screw extruders.
  • the conveying device is preferably a volumetrically conveying unit, for example a pump, in particular a gear pump, the number is adjustable and generates a constant volume flow.
  • a filter device for example, the screen changer described above, which requires a replacement of the sieves when dirty, or a backwash screen changer can be used.
  • the extrusion tool can be a corresponding tool for producing films, tubes, profiles, flat films, plates and the like, and a flat film die.
  • the invention is not limited to the specifically mentioned extruders, pumps, screen changers and extrusion tools.
  • the method according to the invention is characterized in that a volume control or volume control is activated and intervenes in the case of a change in volume, that is to say in the event of a change in the passage of the melt stream between the feed device and the tool over time.
  • the change in the passage rate of the melt stream occurs primarily in a melt loss at a location between the feeder and the tool. It can be done by a manually or automatically generated intervention in the production process. It occurs primarily during a screen change, irrespective of whether the screen change is an exchange of the screens or a backwashing of the screens, in which the melt is withdrawn from the production process.
  • the volume control affects the conveyor to compensate for the volume change.
  • volume control or volume control becomes active.
  • the volume control or volume control increases the volume flow and compensates for the volume loss, for example, the speed of a the delivery rate increases.
  • volume loss can be compensated by the delivery rate of the conveyor (pump) is adapted so that the pressure and thus the delivery volume is kept constant before the tool.
  • the process according to the invention described above is particularly advantageously applicable to extrusion lines using extruders which are not capable of producing high yields press device.
  • extruders are used, for example, in the processing of recycled material, where the material must be gently homogenized and degassed to remove residual moisture.
  • a conveying device in particular a pump and preferably a gear pump, by which the pressure of the melt exiting the extruder is further increased, so that the pressure now sufficient to push the melt through the filter device and to supply the tool properly and continuously as well as pressure and volume constant with melt.
  • the method according to the invention is particularly effective applicable where the filter device contains at least one screen changer, which causes a volume loss in the melt stream during the screen change, in particular the Sieve replacement or rewinding.
  • two types of screen changers are used.
  • a so-called continuous screen changer is used, which makes it possible during the operation of the system to replace sieves, without interrupting the flow of material.
  • a backflush screen changer is preferably used.
  • the latter has the option of diverting the contaminated sieves from the filter by means of bypassing filtered melt
  • the screen change can be carried out automatically in the case of the two variants mentioned, for example by measuring the pressure increase across the sieve or sieve plate, which gives an indication of the degree of soiling of the sieves, and is used as a size which initiates the sieve change. If a screen change signal is present, a screen change control performs backwashing according to a predefinable program. Automatic backwash controls are well known to those skilled in the art. When using a handles a handles this invention.
  • the screen change can be signaled manually or automatically after a predetermined time and be performed manually accordingly.
  • volume control is activated according to the invention during the screen change or rewinding.
  • the volume control may consist in the fact that in a screen change, the delivery rate of the conveyor is automatically increased by values that were determined by previous attempts at sieve replacement or backwashing.
  • a preferred development of the invention proposes that the tool inlet pressure of the pumped medium (polymer melt) be detected and adjusted for adjustment. subsidized volume flow is used.
  • the pressure of the polymer melt is referred to, which prevails in front of the tool and that at a point between the tool and a lying upstream of the tool component of the system, in particular at a point between the tool upstream filter device and the tool.
  • a melt pressure signal for volume control or volume control is of particular advantage because the pressure measurement at any point of the melt stream can be done in a simple, well-known manner, while a direct flow measurement usually eliminates in practice for polymer melts for practice.
  • pressure can be evaluated either in a volume control, which, for example, when the pressure falls below or exceeds certain pressure values corresponding signals to the conveyor off to give the volume flow to increase or decrease.
  • a volume control is used with a closed loop in which the tool inlet pressure is used as a controlled variable, which is converted by the conveyor into a suitable control variable for volume control.
  • the tool inlet pressure can be kept constant within narrow limits, which stabilizes the melt flow and has an advantageous effect on product quality and production safety.
  • volume control or volume control using the tool inlet pressure is essentially only during the occurrence of a volume loss, so relatively short time. Long-term intervention using a pressure signal is not expedient, since parameters of the melt (for example, the viscosity) can change over a longer period of time, and then a predictable relationship between pressure and volume flow is only conditionally present.
  • volume control or volume control only for short time intervals in the method according to the invention. It is activated automatically if a volume loss is produced by an intervention in the production process. Preferred time intervals are between 10 seconds and 10 minutes, in particular between 1 minute and 5 minutes.
  • a loss of volume occurs in particular during a screen change (replacement or backwashing).
  • these operations can also be performed at least partially manually.
  • the screen change process and the volume control or volume control affect each other. After the initiation of an automatic screen change process, it intervenes by suspending (stopping) the screen change process just before a volume loss is expected to occur for a predetermined period of time. Within this period, the volume control or volume control is activated.
  • a preferred embodiment of the invention provides that after the volume control has been activated and before the backwashing process starts, the reservoir is filled with melt.
  • a screen pin of the backwash screen changer can be moved to a position in which it allows melt passage from the main melt stream to the reservoir.
  • the filling of the reservoir can be done relatively quickly, because the melt, which is branched off from the main melt stream for filling the reservoir, is compensated by the volume control.
  • the rapid filling of the reservoir has the consequence that it can be used if necessary with short backwash intervals.
  • the screen is automatically backwashed by moving the screen bolt further to a position where the reservoir is at the clean back of the screen a melt discharge channel is connected.
  • the reservoir is filled relatively quickly with melt until shortly before backwashing, so that the residence time of the melt in the reservoir is short and chemical degradation and cracking of the polymeric melt is avoided.
  • a displacement sensor can be arranged on the screen pin of the screen changer, the signals of which provide information about the screen pin position and thus also about an imminent loss of volume.
  • the initial values of the volume control are adjusted, in particular during the suspension of the screen change process, by determining the instantaneous tool inlet pressure during a predeterminable period of time before starting the volume control or volume control.
  • the value is taken over as setpoint in the following volume control or volume control. Due to this setpoint equalization, the output of the volume controller is switched to the current conditions bumplessly active after accepting the setpoint.
  • the screen bolt After activating the volume control or volume control, the screen bolt continues to move into preprogrammed positions to perform a sieve replacement or a backwash. In this case, a product volume is removed from the delivery process by venting or backwashing the sieves.
  • the volume loss is compensated by the volume control or volume control, so that in particular pressure and volume flow fluctuations are effectively prevented on the tool. be activated, if previously there were constant conditions for a certain period of time. In particular, no changes in the production speed of the pump should have been made for a selectable period of time since it is necessary for the production process to be stable before and while volume control or volume control becomes active.
  • the volume controller controls the delivery volume of the delivery device (eg the speed of the gear pump) and regulates the pressure drop caused by the volume loss.
  • the pressure is used in particular as an auxiliary quantity for averaging the volume flow.
  • the use of the printing size is of particular advantage because no reliable, inexpensive direct volume meters for plastic melts are available.
  • Measurements in the sense of the inventions cover not only individual pressure measurements but also the measurements of differential pressures.
  • the activation of the volume control or volume control can in principle be maintained for a predefinable period of time and then canceled again.
  • the time span must be chosen so that the volume loss is completed with certainty. This requires an additional safety period.
  • a further development of the invention therefore proposes that the volume control or volume control is automatically deactivated if an intervention in the finished.
  • volume loss occurs, for example, during a screen change, in particular if a screen is exchanged (during venting) or backwashed, a signal from the screen change control, which marks the end of the screen change, can be used to deactivate the volume control.
  • a controller for the conveyor device is bumplessly closed by a transfer to an existing prior to the activation of the speed controller of the conveyor.
  • a pump used as a conveying device, in particular gear pump after the deactivation of the volume control or volume control again with the prevailing prior to activation production value (Dreh Lawrence) promotes.
  • volume control is not activated. It is advantageous to operate the conveying device at a constant delivery volume in this operating state. This constant delivery volume is expediently predetermined by the operator by means of an operating device.
  • a conveying device may serve a pump, such as a pulsation gear pump, which delivers a constant volume flow as a volumetric pumping unit of constant speed.
  • a pump such as a pulsation gear pump
  • the pump is in normal operation, if no volume loss is expected during the production process and the volume control is not activated, set to a desired volume flow corresponding constant speed. The operator can wanted production volume, set.
  • the feed device is an extruder and the conveying device is a gear pump
  • the melt inlet pressure can be detected at the inlet of the gear pump and used as a controlled variable for the extruder rpm control.
  • the delivery volume of the delivery device follows the requirements of the delivery device, as long as the delivery volume (eg the speed of the gear pump) of the delivery device is changed.
  • This variant of the method according to the invention can be effective both in normal operation (no volume loss) and in activated volume control or volume control.
  • the tool inlet pressure is measured and a signal is triggered at a predefinable tolerance deviation of the tool inlet pressure.
  • the signal may be, for example, an acoustic and / or optical signal.
  • the operator can intervene at any time in the extrusion process and, for example, change the pump speed in order to set the production speed.
  • the volume control For a correct function of the volume control, however, it is a prerequisite that during the activated volume control no setpoint changes of the conveyor are made by the operator. Otherwise, the controlled variable, namely the melt pressure at the inlet of the tool, would no longer be usable.
  • the screen change In the case of an intervention by the operator during a screen change (for example during a sieve replacement or a backwash), the screen change is stopped and the volume control is ended.
  • the corresponding screen pin is stopped and a warning signal is generated.
  • a quick retraction of the screen bolt in its middle position should not take place, as there may still be air pockets, which could lead to significant production disruptions.
  • the operator then has the option of well-thought-out manual manipulation to end the process without a production aborted or polar disorders occur.
  • volume control or volume control is aborted and transferred to the controlled normal operation (no volume loss).
  • the screen pin is usually moved automatically according to predetermined program specifications to positions which are predetermined for the backwashing and venting process sequences in accordance with the present screen pin geometry.
  • These predetermined positions of the filter device usually do not depend on changing production conditions. Certain production conditions, such as higher pressures, higher temperatures and loss, which can not be compensated by the pump used (pump), so that it comes despite the volume control to reduce the flow rate at the tool inlet.
  • a development of the invention provides that, when the volume control or volume control is activated, the positioning of the screen bolts is carried out as a function of the opening of the volume regulator, ie the positioning of the sieve bolts is stopped or the volume control is reached when a predefinable control deviation of the volume control is reached slows down and resumes when the control swing has decreased.
  • the abovementioned predetermined positions of the filter device merely serve as "safety limit switches", ie as maximum permissible deflection positions.
  • volume losses due to changing pressures, temperatures and viscosities can be compensated in the inventive method even if the performance of the conveyor is not sufficient to compensate for volume losses in a normal, not affected by the volume control screen change.
  • the positioning of the screen pin in response to the opening of the volume controller but if, conversely, the screen pin is automatically moved to predeterminable program for the purpose of venting Siebkavticianen in predeterminable positions, and the volume controller responds to this and compensates for a volume loss by increasing the speed of the gear pump.
  • the screen pin is not immediately moved to a maximum 5, réellestechnik, but initially placed in a so-called Vorflutposition in which only a small overlap between the backwashed channel is given. The overlap can be, for example, a few tenths of a millimeter. After a time program then the screen pin is moved in one or more other positions with increasing overlap.
  • the respective Siebbolzenpositionen are determined empirically for the respective filter such that the melt loss occurring in the positions of the volume controller is not overwhelmed and the volume controller can compensate for melt loss at any time.
  • the invention relates to a plastic processing plant, which serves primarily to carry out the method described above.
  • the plant according to the invention consists at least of a feed device for a polymeric melt, in particular an extruder, a conveying device, in particular a melt pump, a filter device and a tool.
  • the plastics processing plant is characterized by a volume control device or a volume control device which can be activated at a volume change of the polymer melt occurring between the feed device and the tool, in particular a volume loss, wherein the volume control device or volume control device is in communication with the conveying device and these influenced to make a volume control or volume control of the conveyor, which adjusts the flow rate and compensates for the change in volume.
  • the system according to the invention makes it possible to maintain a constant volumetric flow even when material is removed from the volumetric flow as a result of a screen change or a screen backflush.
  • the filter device contains a backwash screen changer, to which a reservoir for receiving filtered melt is connected.
  • the reservoir serves to receive a partial melt stream from the production process and to use this for backwashing of sieves.
  • the filling of the reservoir and the removal of melt for the purpose of rewinding can be done by moving a sieve pin. In this case, for example, by moving the screen pin backwashed sieve from its production position, d. H. from the melt stream to be driven.
  • the screen bolt then first reaches a predeterminable position in which a connection is established between the filtered main melt stream and the reservoir and the reservoir is filled with melt.
  • the volume control balances the melt loss in the melt main stream.
  • the screen pin After filling the reservoir, the screen pin is moved to another predeterminable position in which a connection between the reservoir and the clean side of the screen is made and the dirty side of the screen communicates with a drain channel. In this position, the backwashing of the screen is carried out without affecting the main stream of melt. After completion of the backwash, the screen pin is moved back to the production position of the screen.
  • the volume control device or volume control device contains a closed control loop.
  • the control circuit uses the tool inlet pressure as a controlled variable and converts it by the conveying device into a suitable control variable for volume control. This ensures that, in particular, in the course of a screen change, the volume flow is kept constant.
  • a pump and preferably a gear pump as the conveying device.
  • the pump is in normal operation of the system, if no volume loss during the production process is to be expected, adjustable to a desired volume flow corresponding constant speed.
  • a second pressure sensor is preferably provided.
  • a first pressure sensor In order to increase the operational safety of the plastics processing plant, it is further expedient to monitor the tool inlet pressure by a first pressure sensor.
  • the pressure sensor is connected to a signaling device, in particular an acoustic and / or optical signaling device. A signal is triggered if the tolerance of the tool inlet pressure is specified and / or if the operator malfunctions.
  • FIG. 1 is a schematic view of a plastic processing plant according to the invention
  • Fig. 2 is a block diagram of the functional sequence for a
  • FIG. 3 is a block diagram of the functional sequence for a
  • 5 is a block diagram of the functional sequence for a
  • a plastic processing plant in which in melt flow of the polymeric melt successively designed as a screw extruder 10 feeder, a safety filter 12, designed as a gear pump 14 conveying device, a filter device 16 and a tool 18, for example, a flat foil nozzle are arranged ,
  • the screw extruder 10 has a filling device in the form of a funnel 20, over which the still to be melted consists of a plastic granules, the or the screw of the screw extruder 10 is supplied. In the screw extruder 10, the granules are heated, melted and conveyed in the direction of the safety filter 12. Depending on the properties of the pumped medium, a degassing device not shown in the worm cylinder of the screw extruder 10 is provided.
  • the gear pump 14 is a low-pulsation gear pump, which supplies a constant volume flow as a volumetrically conveying unit of constant speed.
  • the filter device 16 arranged downstream of the pump 14 can be designed, for example, as a backwash screen changer and / or as a screen changer for a screen replacement.
  • the filter device 16 is designed such that an uninterrupted flow of melt to the tool is also conveyed during the backwashing or replacement of the sieve.
  • a reservoir 21 for receiving filtered melt can be connected to it, which was indicated in FIG. 1 by dashed lines.
  • a first pressure sensor 22 measures the melt pressure (for example 100 bar) which prevails between the filter device 16 and the tool 18.
  • a second pressure sensor 24 measures the melt pressure (for example 30 to 50 bar) which prevails between the safety filter 12 and the gear pump 14.
  • a third pressure sensor 26 measures the melt pressure (for example, 140 bar) prevailing between the gear pump 14 and the filter device 16.
  • a fourth pressure sensor 28 measures the melt pressure (eg, 50 bar) prevailing between the screw extruder 10 and the safety filter 12.
  • the pressure signals of the four pressure sensors 22, 24, 26, 28 are transmitted to an extruder control unit 30.
  • the extruder control unit 30 controls the screw extruder 10 and the gear pump 14. Through an extruder control panel 32 communicating with the extruder control unit 30, an operator can set control signals to influence the operation of the screw extruder 10 and the gear pump 14 To specify, for example, their speed and thus the flow rate.
  • the operator For normal operation, in which no sieve replacement and no backwash, the operator sets a constant melt or volume flow. Because of the use of the gear pump 14, the pump speed is substantially proportional to the delivered melt flow rate through the plant. To keep the volume flow constant, the operator therefore sets a nominal speed for the gear pump 14 via the extruder control panel 32.
  • the extruder control unit 30 delivers corresponding signals to a pump control 34, which activates the drive 36 of the gear pump 14 in order to keep the speed of the gear pump 14 constant at the predetermined desired speed (speed control). Because of the constant speed, the gear pump 14 delivers a constant volume flow, which ensures the required product quality.
  • the third pressure sensor 26, which detects the melt flow at the output of the gear pump 14, serves as a control device to report disturbances.
  • the inlet pressure of the gear pump 14 is detected by the second pressure sensor 24.
  • the extruder control unit 30 regulates the rotational speed of the screw extruder 10 such that the inlet pressure of the gear pump 14 is kept constant. This regulation can be used in all modes of operation described below Screw extruder 10 adapted to the speed of the gear pump 14, and responds to changes in the gear pump speed to a greater or smaller melt demand caused thereby.
  • a screen change control unit 38 automatically controls the screen change (sieve replacement or backwash). About a screen change control panel 40, the operator can influence the screen change, for example, trigger a screen change, cancel the screen change or adjust a degree of contamination of the filter device 16, in which a screen change is triggered automatically.
  • the screen changer control unit 38 and the extruder control unit 30 communicate with one another via the data line 42.
  • the communication is mainly used to control between a speed control of the gear pump 14 and a volume control 39 of the gear pump 14.
  • a filter device 16 can be used, for example, a device as described in EP 0 798 098 Bl.
  • a sequencer runs in the control program. Initially, there is no screen change and the gear pump 14 is speed-controlled as described. In step 100 it is checked Starting condition may be, for example, a manual selection by, the operator, exceeding a preset Siebprordrucks, exceeding a differential pressure threshold or exceeding a time limit.
  • the differential pressure is determined from the measured values of the first and third pressure sensors 22, 26. It increases with the degree of contamination of the sieves of the filter device 16.
  • step 110 If a start condition is present, the hydraulic aggregate of the screen changer is started in step 110.
  • step 120 that sieve or backwash opening is selected with which the backwashing is started.
  • a backwash opening is provided for each of the four screens.
  • all sieves are backwashed in a certain order one after the other.
  • a backflush process is preferably started with the screen following second after the last flushed screen in a previous backflush process. This means that the sieve, which should be started with the backwashing process, if the order is kept knitting, is first skipped and is backwashed last. This ensures that inaccuracies in the rinsing effect after various cycles are compensated.
  • the piston carrying the screen to be backflushed is not immediately moved to the backwashing position. He is first moved to a position in which the backwashing sieve receiving connecting channel area just barely communicates with the associated spillway.
  • the screen changer control unit 38 now carries out an averaging of the signal transmitted by the first printing activates the volume control.
  • the extruder control unit 30 adopts the determined pressure control value and adds this value to the regulation of the gear pump 14. By averaging, the two types of control are adjusted so that a bumpless transfer takes place.
  • pressure is used as a controlled variable and the gear pump 14 as a manipulated variable. This has the consequence that the pressure of the first pressure sensor 22 is kept constant.
  • the speed of the gear pump 14 is a measure of the respective system throughput or volume flow of the polymer melt. It is up to the operator to set and set a speed reference.
  • the gearwheel control is switched from speed control to volume control for a short time.
  • a suitable speed value is formed from the pressure value of the pressure sensor 22.
  • the speed value formed from the pressure value is adjusted to the previously prevailing, "old" speed setpoint such that a smooth transition takes place at the transition between the two control modes. If volume losses occur as a result of the backwash, the pressure measured by the pressure sensor 22 and thus also the associated speed setpoint change.
  • the value of the speed change is added up to the "old" speed setpoint (adder value) and the adder value is used as the current speed setpoint for the volume control.
  • a monitoring algorithm is activated which checks whether an abort criterion exists which requires an interruption of the backwashing.
  • An abort criterion is the Zahnrad.pu.mpe 14 changes, for example, to change the amount of melt flow.
  • the control variable obtained by the first pressure sensor also changes. Consequently, the volume control no longer operates without errors when the setpoint speed is changed.
  • the monitoring algorithm determines the presence of an abort criterion during the intervention of the volume control 39, the control intervention is controlledly interrupted as far as possible and the screen changer is moved into its normal production position. After a waiting period during which no further change takes place, the process is started again with step 100. Alternatively or additionally, a warning signal can be issued to the operator, so that they can finish the Sieb grillvorgang by hand.
  • the screen plunger is moved to its pre-programmed backwash position by step 150. Occurring pressure changes that occur due to the volume loss during backwashing at the first pressure sensor 22 are compensated by the screen changer control unit 38 in combination with the extruder control unit 30.
  • Step 160 sets a programmable backflush time.
  • step 160 After expiry of the backflush time of step 160, the screen bolt is returned to its normal production position as a result of step 170.
  • the volume control closes automatically as soon as no volume loss occurs after closing the backwash opening.
  • the speed control is activated. In this case, the number of revolutions of the put-down gear is set back to the "old" setpoint speed, because the Using the Addierivess can be ensured that after completion of the volume control intervention, the "old" setpoint speed is applied again.
  • the system throughput remains the same before and after the backwash and is not permanently and undesirably changed by the volume control intervention.
  • Step 180 starts a hard-coded waiting period during which the production process can calm down.
  • Step 190 returns the algorithm to step 100 and starts the backwash process for the next sieve until all sieves of the filter device 16 are backwashed. After successful completion of all backwashing processes, the readiness for restarting the backwashing process is activated.
  • FIG. 3 shows a fully automatic functional sequence of a "backwashing" step sequence for a backflush screen changer, in which an intervention by the volume control 39 and, in addition, a dynamic screen pin positioning takes place.
  • the steps 100, 110, 120, 130, 140, 160, 170, 180 and 190 of the functional sequence shown in FIG. 3 correspond to the steps 100, 110, 120, 130 explained with reference to FIG. 2,
  • FIG. 3 deviates from the step 150 of FIG. 2.
  • the different step is designated in FIG. 3 with step 151 and explained below.
  • the screen bolt is replaced by step 151
  • the strainer pin does not move immediately to its position in which the connecting channel region receiving the sieve to be backwash fully covers the associated discharge channel (maximum backwashing position, safety limit switch), as is the case in step 150 of FIG. Rather, the screen pin is driven dynamically controlled in his under the prevailing production conditions maximum backwash position. In this case, occurring pressure changes, which occur due to the volume loss during backwashing at the first pressure sensor 22, are regulated by the screen changer control unit 38. When a preselected threshold value of the control output is reached, the screen pin movement is stopped.
  • FIG. 4 shows a fully automatic functional sequence of a step sequence "screen change" for a screen exchange changer in which an intervention by the volume control 39 takes place.
  • Step 200 is essentially the same as step 100 of FIG. 2. It should be noted, however, that the change of screens involves a manual input assisted by the controller. NEN operator intervention is started.
  • step 210 the hydraulic aggregate of the screen changer is started in step 210.
  • Step 220 moves the screen pin to a pre-programmed screen change position.
  • the order and manner of Siebwechseins depends on this type and not relevant. It is only important here that the sieve holder (cavity) is moved outwards, so that it is accessible and the sieves can be replaced. For screen exchangers with four cavities, two cavities can be moved simultaneously into positions accessible from the outside, in order to make the interchangeability of the screen change more effective.
  • a Sieveendwechsler is for example a filter device into consideration, as described in DE 35 27 173 Cl.
  • step 230 When the screen change position is reached, the operator cleans the externally accessible screen cavities and replaces the screens. After completion of this activity, the re-entry of the screen pin by the operator is started in step 230.
  • the piston carrying the replaced screen is not immediately moved to its normal production position. This would have the consequence that air pockets in the cavity could get to the tool and interfere with the production process. Rather, the screen pin is moved into one or more venting positions, in which the cavities are vented. In this case, a volume loss occurs, which is compensated by the volume control Has reached the ventilation position.
  • the screen changer control unit 38 assumes the current value of the pressure sensor 22 and forms the desired value of the volume control.
  • the extruder control unit 30 adds the determined volume control value to the existing speed setpoint of the gear pump 14 and forwards it to the gear pump 14 as a new desired value. Thus, the speed control is switched to volume control.
  • the two types of control are adjusted so that a bumpless transfer takes place.
  • pressure is used as a control variable and the speed of the gear pump 14 continuously adapted so that the pressure of the first pressure sensor 22 is kept constant.
  • the gear pump 14 thus forms the manipulated variable for the volume control.
  • the speed of the gear pump 14 is a measure of the plant throughput or volume flow. It is up to the operator to set and set a speed reference.
  • the gear pump control switches from the speed control to a volume control for a short time.
  • a suitable speed value is formed from the pressure value of the pressure sensor 22.
  • the speed value formed from the pressure value is adjusted to the previously prevailing, "old" speed setpoint by averaging so that a smooth transition occurs at the transition between the two control modes. If volume losses occur as a result of the sieve replacement, the changes due to the
  • Pressure sensor 22 measured pressure and thus also the associated speed setpoint. The value of the speed change is summed up to the "old" speed setpoint (adding value) and the used.
  • step 250 moves the screen bolt to its pre-programmed bleed position.
  • the Siebkavticianen inflowing melt creates a pressure drop at the first pressure sensor 22, which is compensated by the volume control of the pump speed.
  • Step 270 starts a fixed programmable wait time during which the production process can stabilize.
  • Step 190 returns the algorithm to step 200 and starts the screen changing operation for a second and further screen pin, if any.
  • Sequencer "sieve change" for a sieve replacement in which an intervention by the volume control 39 and additionally a dynamic screen pin positioning takes place.
  • the steps 200, 210, 220, 230 and 240 of the functional sequence shown in FIG. 5 correspond to the steps 200, 210, 220, 230 and 240 explained with reference to FIG. 4 and will not be dealt with again here.
  • the functional sequence of FIG. 5 deviates from the step 250 of FIG. 4.
  • the different step is designated in FIG. 5 with step 251 and explained below.
  • step 251 moves the screen bolt toward its pre-programmed bleed position.
  • the screen bolt is not immediately moved into its position in which a maximum connection between the screen cavity and the environment is produced, as is the case in step 250 of FIG. 4. Rather, the screen pin is driven dynamically controlled in his under the prevailing production conditions maximum ventilation position. In this case occurring pressure changes, which occur due to the volume loss during venting or filling of the cavity at the first pressure sensor 22, through the
  • Screen changer control unit 38 regulated. When a preselected threshold value of the control output is reached, the screen pin movement is stopped. This ensures that the positioning of the screen pin always takes place according to the possibilities of the process components. This allows a controlled outflow of melt, which does not overwhelm the gear pump performance. By these measures, variations in the process, such. As changing pressures, temperatures and viscosities compensated. In addition, always the minimum possible conditions are maximized.
  • the dynamically controlled setting of the screen changer positions is considerably simplified, while at the same time the quality of the positioning is improved with regard to the effectiveness in fulfilling the task.
  • the screen pin After completion of the venting or filling of the Siebkavtician the screen pin is moved according to step 260 in its production position. Before reaching these, the volume control closes automatically as no volume loss occurs and needs to be compensated. The volume control is deactivated and the speed control is activated. The pump speed is set back to the "old" level, since the aforementioned addition value is zero.
  • Step 270 starts a fixed programmable wait time during which the production process can stabilize.

Landscapes

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

Abstract

Un procédé pour commander une installation de traitement de matière plastique et une installation correspondante sont décrits, l'installation comprenant au moins un dispositif d'alimentation d'une matière polymère fondue, en particulier une extrudeuse (10), un dispositif de transport, en particulier une pompe pour matière fondue (14), un dispositif de filtrage (16) et un outil (18). Afin de maintenir un débit volumétrique constant lorsqu'une modification de volume entre le dispositif d'alimentation (10) et l'outil (18) survient, il est proposé, en cas de modification de volume, d'activer un dispositif de commande de volume qui influence la quantité transportée du dispositif de transport (14) de sorte que la modification de volume soit équilibrée. Le dispositif de commande de volume comprend un circuit de régulation qui utilise la pression en amont de l'outil en tant que valeur de régulation.
EP07721890A 2006-04-24 2007-02-07 Procédé de commande d'une installation de traitement de matière plastique et installation de traitement de matière plastique Withdrawn EP2010367A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006019445A DE102006019445A1 (de) 2006-04-24 2006-04-24 Verfahren zur Steuerung einer kunststoffverarbeitenden Anlage und kunststoffverarbeitende Anlage
PCT/DE2007/000220 WO2007121696A1 (fr) 2006-04-24 2007-02-07 Procédé de commande d'une installation de traitement de matière plastique et installation de traitement de matière plastique

Publications (1)

Publication Number Publication Date
EP2010367A1 true EP2010367A1 (fr) 2009-01-07

Family

ID=38235431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07721890A Withdrawn EP2010367A1 (fr) 2006-04-24 2007-02-07 Procédé de commande d'une installation de traitement de matière plastique et installation de traitement de matière plastique

Country Status (3)

Country Link
EP (1) EP2010367A1 (fr)
DE (1) DE102006019445A1 (fr)
WO (1) WO2007121696A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013005199A1 (de) * 2013-03-25 2014-09-25 Maag Pump Systems Gmbh Verfahren zur Steuerung einer schmelzeverarbeitenden Anlage
CN108367479A (zh) 2015-12-16 2018-08-03 埃克森美孚化学专利公司 用于加工聚合物的装置和方法
CN108367478B (zh) * 2015-12-16 2021-05-11 埃克森美孚化学专利公司 用于加工聚合物的装置和方法
DE102017115295B3 (de) 2017-07-07 2018-10-25 Nordson Corporation Filtriervorrichtung und Verfahren zum Betreiben derselben
CN108556305B (zh) * 2018-04-16 2023-09-26 浙江绿宇环保有限公司 一种过滤系统
CN115836146B (zh) 2020-06-16 2026-02-27 美国阿拉丁制造公司 用于提供颜色增强的纱线的系统和方法
EP4164974A4 (fr) 2020-06-16 2025-01-08 Aladdin Manufacturing Corporation Systèmes et procédés de production d'un faisceau de filaments et/ou d'un fil
WO2022029676A1 (fr) * 2020-08-07 2022-02-10 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Extrudeuse et procédé pour effectuer une analyse diagnostique dans une extrudeuse
CN117203383A (zh) 2021-04-23 2023-12-08 美国阿拉丁制造公司 制造纱线的方法和以该方式获得的纱线
CN222756011U (zh) * 2021-12-22 2025-04-15 莱芬豪舍有限责任两合公司机器制造厂 用于利用回收材料来生产膜带的吹膜设备
US12502809B2 (en) 2021-12-23 2025-12-23 Shaw Industries Group, Inc. Polymer injection system comprising multiple pumps and methods of using same
DE102022106334A1 (de) 2022-03-18 2023-09-21 Nordson Corporation Filtriervorrichtung zum Filtrieren eines Fluids sowie betreffendes Betriebsverfahren
CN114750394A (zh) * 2022-04-30 2022-07-15 汕头市达诚环保精机科技有限公司 一种挤出机真空冒料现象的检测及处理方法
CN120866951B (zh) * 2025-09-26 2025-11-25 常州纺兴精密机械有限公司 一种三组份复合中空纤维低阻高效成丝系统及控制方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5122315A (en) * 1990-04-30 1992-06-16 Luwa Corporation Method and appparatus for monitoring and controlling thermoplastic extruder output
AT395825B (de) * 1991-03-25 1993-03-25 Erema Filtriervorrichtung fuer zu reinigende fluide
DE10034468A1 (de) * 2000-07-15 2002-01-31 Kreyenborg Verwaltungen Siebwechsler mit Schmelzepumpe
DE50011981D1 (de) * 2000-11-24 2006-02-02 Maag Pump Systems Textron Ag O Verfahren zur Steuerung eines Extrusionssystems und Vorrichtung zur Durchführung des Verfahrens
DE10113949A1 (de) * 2001-03-22 2002-09-26 Krupp Elastomertechnik Gmbh Vorrichtung zum Sieben von Kautschuk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007121696A1 *

Also Published As

Publication number Publication date
WO2007121696A1 (fr) 2007-11-01
DE102006019445A1 (de) 2007-10-25

Similar Documents

Publication Publication Date Title
EP2010367A1 (fr) Procédé de commande d'une installation de traitement de matière plastique et installation de traitement de matière plastique
DE102011011545B4 (de) Verfahren und Vorrichtung zum Einbringen eines Fluids in eine Fuge
EP0554237A1 (fr) Appareil de filtration pour fluides contaminés et procédé pour sa mise en oeuvre
EP2994289A1 (fr) Procédé et dispositif d'exploitation d'un filtre à tamis rotatif
WO2008025313A1 (fr) Dispositif pour le filtrage d'un fluide, en particulier pour des installations de transformation des matières plastiques
EP1997384B1 (fr) Régulation de la température du flux de matière dans une machine de remplissage
EP1390190B1 (fr) Procede et dispositif de regulation de pression dans une extrudeuse de degazage a une seule vis ou une extrudeuse en cascade
EP1208956B1 (fr) Procédé et dispositif pour régler une ligne d'extrusion
EP4493386A1 (fr) Dispositif de filtration pour filtrer un fluide et procédé de fonctionnement correspondant
EP2111966B1 (fr) Système de traitement de plastique coulable
EP0233548A2 (fr) Méthode et dispositif pour régler le procédé de moulage par injection
JP6553591B2 (ja) 溶融物処理設備を制御する方法
AT525668B1 (de) Plastifiziereinheit für eine Formgebungsmaschine
DE19635706A1 (de) Verfahren zum Plastifizieren, Sieben, Dosieren und Fördern hochviskoser polymerer Schmelzen und Einrichtung für die Durchführung des Verfahrens
DE10356711A1 (de) Bandsiebwechsler
DE10208589C2 (de) Spritzgießmaschine
WO2006018006A1 (fr) Procedes pour filtrer un fluide et dispositif et unite de filtrage pour mettre en oeuvre lesdits procedes
WO2014184220A1 (fr) Filtre de matière en fusion avec dispositif d'entraînement pour un prédrainage actif
EP4412815B1 (fr) Méthode et système de filtration de liquides et/ou de matières fondues
EP1321276B1 (fr) Machine de moulage par injection avec accumulateur hydraulique
EP2931492A1 (fr) Procédé d'extrusion-soufflage et dispositif pour la mise en oeuvre dudit procédé
AT526286B1 (de) Filtervorrichtung
EP1118447B1 (fr) Appareil pour l'alimentation de matériaux élastomériques, utilisation d'un tel appareil et deux méthodes opératoires
DE4136637A1 (de) Trennvorrichtung
DE4405552A1 (de) Regelung des Schmelzestromes bei der Verarbeitung thermoplastischer Kunststoffe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20081001

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MAAG PUMP SYSTEMS GMBH

17Q First examination report despatched

Effective date: 20130814

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140225