DE1529918A1 - Plastic screw press with measuring sensors for the work piece - Google Patents

Plastic screw press with measuring sensors for the work piece

Info

Publication number
DE1529918A1
DE1529918A1 DE19641529918 DE1529918A DE1529918A1 DE 1529918 A1 DE1529918 A1 DE 1529918A1 DE 19641529918 DE19641529918 DE 19641529918 DE 1529918 A DE1529918 A DE 1529918A DE 1529918 A1 DE1529918 A1 DE 1529918A1
Authority
DE
Germany
Prior art keywords
screw
screw press
work piece
measuring sensors
plastic screw
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
DE19641529918
Other languages
German (de)
Inventor
Hermann Hoppe
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.)
Frieseke and Hoepfner GmbH
Original Assignee
Frieseke and Hoepfner 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 Frieseke and Hoepfner GmbH filed Critical Frieseke and Hoepfner GmbH
Publication of DE1529918A1 publication Critical patent/DE1529918A1/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/78Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/84Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders by heating or cooling the feeding screws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92009Measured parameter
    • B29C2948/92019Pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92009Measured parameter
    • B29C2948/92209Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92323Location or phase of measurement
    • B29C2948/92361Extrusion unit
    • B29C2948/9238Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/9239Screw or gear
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion 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

Description

Kunststoff-Schneckenpresse mit Messfühlern fUr das Arbeitsgut P a t e n t a n m e 1 d u n g Die Erfindung bezieht sich auf eine Schneckenpresse fiEr die Herstellung von Gegenständen aus thermoplastischem Kunststoff.Plastic screw press with measuring sensors for the work piece P a t e n t a n t a n m e 1 d u n g The invention relates to a screw press fiEr the manufacture of objects made of thermoplastic material.

Derartige Schneckenpressen sind mit einer Reihe von druck-und temperaturempfindlichen Messfühlern ausgerüstet, mit denen die für eine fachgerechte Verarbeitung der thermoplastischen Massen erforderlichen Kennwerte überwacht werden.Such screw presses are sensitive to pressure and temperature Equipped with measuring sensors with which for a professional processing of the thermoplastic Masses required characteristic values are monitored.

Es ist bekannt, die Temperatur des Arbeitsgutes mit Thermoelementen zu erfassen, die in Bohrungen des die Förder-bzw.It is known to measure the temperature of the work item with thermocouples to record, which in the bores of the production or.

PreBschnecke umgebenden Zylindermantels eingelassen sind. Diese Erfassungsmethode ist jedoch ziemlich unzulänglich, denn die in dem Arbeitsgut oder auch in der Schnecke herrschenden Temperaturen werden nicht direkt erfasst, weil die Thermofühler wegen der sich an der Zylinderwandung entlangbewegenden Schneckengänge nicht in die Kunststoffmasse hineinragen dürfen. Hinzu kommt, dass die Wärmeleitfähigkeit der Kunststoffe bekanntlich relativ schlecht'ist. Hierdurch wird eine weitere Verfälschung des Messer. Tebniases bewirkt. Man hat daher versucht, diesen Unzulänglichkeiten durch besondere Eichungen der Aless-und Anzeigeinstrumente oder ihrer Folgeglieder zu begegnen. Es liegt auf der Hand, dass ... ie dem bekannten Erfassungsprinzip innewohnenden Mängel hierdurch nicht beseitigt, sondern nur mehr oder weniger abgeschwächt werden.PreBschnecke surrounding the cylinder jacket are embedded. This acquisition method is, however, quite inadequate, because that in the work piece or in the screw The prevailing temperatures are not recorded directly because the thermal sensors are due to the screw threads moving along the cylinder wall do not get into the plastic compound are allowed to protrude. In addition, the thermal conductivity of plastics is well known is relatively bad. This will further falsify the knife. Tebniases causes. Attempts have therefore been made to remedy these inadequacies by means of special calibrations to encounter the Aless and display instruments or their successors. It is on it is clear that ... the deficiencies inherent in the known recording principle as a result cannot be eliminated, but only more or less weakened.

Um ein möglichst gleiohmässiges Verarbeiten und damit ein einwandfreies Endprodukt zu erhalten, kann beispielsweise die tberwachung der Temperaturen in der Masse zufolge der scharfen und engen Aufsohmelzbereiche nicht gut genug sein. Ferner muss auch die bei dem jeweiligen, dem Stoff anzupassenden Drehzahlprogramm sioh einstellende Friktionswärme mit erfasst und gesteuert werden. Schliesslich soll sich die Uberwachung der einzelnen Messgrössen über den gesamten wirksamen Schneckenbereich vom Fülltrichter bis hin zum Spritzkopf erstrecken, um die Verarbeitung in allen ihren Einzelphasen kontrollieren zu können.To ensure that processing is as uniform as possible and therefore that it is flawless Obtaining the end product can be done, for example, by monitoring the Temperatures in the bulk do not result from the sharp and narrow melting areas be good enough. Furthermore, the must also be adapted to the respective substance The speed program, which adjusts the friction heat, can also be recorded and controlled. Ultimately, the monitoring of the individual measured quantities should be carried out over the entire effective screw area extend from the hopper to the die head in order to to be able to control the processing in all its individual phases.

Die vorliegende Erfindung setzt sich die Aufgabe, in Abwendung von der bekannten Erfassungsmethode eine Schneckenpresse anzugeben, bei der die Messfühler eine Überwachun der betreffenden Kenngrössen im Arbeitsgut selbst ermöglichen.The present invention has the task of avoiding specify the known detection method a screw press, in which the measuring sensor enable monitoring of the relevant parameters in the work item itself.

Um dies zu erreichen, ist die neue Schneckenpresse für die Herstellung von Gegenständen aus thermoplastischem Kunststoff, mit Messfühlern für das Arbeitsgut, erfindungsgemäss dadurch gekennzeichnet, dass die Förder-bzw. Preßschnecke mit zwischen den Schneckengängen auf dem Schneckenkern angebrachten I. : essfühlernt beispielsweise Thermoelementen,versehen ist. Der einzelne Messfühler kann dabei nur wenig über den Kerndurchmesser hinausragen, er kann aber auch tief in das Arbeitsgut, vorzugsweise bis in halbe Höhe der Schneckengänge, hineinragen. Auf jeden Fall bietet die Erfindung die Möglichkeit, die einzelnen Kenngrössen für das Arbeitsgut an jeder beliebigen Stelle der Förderräume zwischen den Schneckengängen abzun@@men. Es ist wohl offensichtlich, dass mit der erfindungsgemässen Ausbildung der Pressenschnecke eine bestmögliche Erfassung der Kenngrössen gewährleistet und damit eine Anwendung an sich bekannter vollautomatischer Regelungsvorriohtungen bei derartigen Schneckenpressen und demzufolge eine Einsparung an teuerem, fachlich geschulten Bedienungspersonal ermöglicht wird.To achieve this, the new screw press is available for manufacture of objects made of thermoplastic material, with measuring sensors for the work item, according to the invention characterized in that the conveying or. Press screw with between I. attached to the worm threads on the worm core: for example, it feels like eating Thermocouples. The individual measuring sensor can only have a little over the core diameter protrude, but it can also deeply into the work piece, preferably up to half the height of the worm threads. In any case, the invention offers the possibility of the individual parameters for the work item at any Place of the conveying chambers between the screw flights to be removed @@ men. It is obvious that with the design of the press screw according to the invention, the best possible Detection of the parameters guaranteed and thus an application itself better known fully automatic control devices in such screw presses and consequently a saving in expensive, professionally trained operating personnel is made possible.

Die Erfindung wird nachstehend anhand eines in der Zeichnung veranschaulichten AusfUhrungabeispiels erläutert.The invention is illustrated below with reference to one in the drawing Execution example explained.

Die nur im Teil gezeigte Förderschnecke 1 mit den Schneckengängen 2 ist mit Ther oelementen 3 und 4 versehen. Deren Anschlussleitungen 5 und 6 verlaufen durch den hohlen Schneckenkern zum rückwärtigen Ende der Schnecke. Dort werden sie in an sich bekannter Weise liber nach dem Sohleifringprinsip arbeitende Kontaktglieder in den feststehenden Teil der Schneckenpresse übertragen.The screw conveyor 1, shown only in part, with the screw flights 2 is provided with thermoelements 3 and 4. Their connecting lines 5 and 6 run through the hollow screw core to the rear end of the screw. There they will in a manner known per se via contact members working according to the sole ring principle transferred to the fixed part of the screw press.

Wie aus der Zeichung ersichtlich, ragt das Thermoelement4 nur wenig {ber die Oberfläche des Kernes hinaus, w4hrend das Dher-oelenent 3 sich etwa bis in halbe Hohe der Schneckengänge erstreckt.As can be seen from the drawing, the thermocouple 4 protrudes only a little {over the surface of the core, while the Dher oil 3 is about up to extends halfway up the worm threads.

Claims (2)

P a t e n t a n s p r ü c h e : 1. Schneckenpresse für die Herstellun@ von Gegenständen aus thermoplastischem Kunststoff, mit. essliihlern i-ir das Arbeitsgut, d a d u r c h e k e n z e i c nn e t, dass die Förder- bzw. @reßschnecke mit zwischen den Schneckent-än=-en auf dem Schneckenkern angebrachten @eßfühlern, beispielsweise Thermoelementen, versehen ist.P a t e n t a n s p r ü c h e: 1. Screw press for the production of objects made of thermoplastic material, with. essential i-ir the work goods, d a d u r c h e k e n g e i c nn e t that the conveyor or snake screw with between sensors attached to the screw core, for example Thermocouples. 2. Schneckenpresse nach @nspruch 1, g e k e n n z e i c h -net durci eine Anoranung der. essfüh@er derart, dass die Messgrösse im Bereich der @alben Höhe der Sch@eckengrange erfas ; t wird.2. Screw press according to claim 1, g e k e n n n z e i c h -net durci an arrangement of the. in such a way that the measured variable in the area of the albums Height of the Sch @ eckengrange captured; t will.
DE19641529918 1964-06-23 1964-06-23 Plastic screw press with measuring sensors for the work piece Pending DE1529918A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0043238 1964-06-23

Publications (1)

Publication Number Publication Date
DE1529918A1 true DE1529918A1 (en) 1969-10-30

Family

ID=7099456

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19641529918 Pending DE1529918A1 (en) 1964-06-23 1964-06-23 Plastic screw press with measuring sensors for the work piece

Country Status (1)

Country Link
DE (1) DE1529918A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801499A1 (en) * 1978-01-11 1979-07-12 Siemens Ag EXTRUDER FOR THE TREATMENT OF HIGH TEMPERATURE-SENSITIVE PLASTICS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801499A1 (en) * 1978-01-11 1979-07-12 Siemens Ag EXTRUDER FOR THE TREATMENT OF HIGH TEMPERATURE-SENSITIVE PLASTICS

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