DE1072378B - Spray head with slot nozzle for the production of flat films, in particular from thermoplastics - Google Patents
Spray head with slot nozzle for the production of flat films, in particular from thermoplasticsInfo
- Publication number
- DE1072378B DE1072378B DENDAT1072378D DE1072378DA DE1072378B DE 1072378 B DE1072378 B DE 1072378B DE NDAT1072378 D DENDAT1072378 D DE NDAT1072378D DE 1072378D A DE1072378D A DE 1072378DA DE 1072378 B DE1072378 B DE 1072378B
- Authority
- DE
- Germany
- Prior art keywords
- baffle
- plastic
- channel
- sections
- spray head
- 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
Links
- 239000007921 spray Substances 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 229920001169 thermoplastic Polymers 0.000 title description 3
- 239000004416 thermosoftening plastic Substances 0.000 title description 3
- 239000004033 plastic Substances 0.000 claims description 28
- 229920003023 plastic Polymers 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 3
- 238000005755 formation reaction Methods 0.000 claims 3
- 238000007493 shaping process Methods 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000002965 rope Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000009827 uniform distribution Methods 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
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
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
- B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—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
-
- 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
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/255—Flow control means, e.g. valves
- B29C48/2556—Flow control means, e.g. valves provided in or in the proximity of dies
Description
Die Erfindung Hegt auf dem Gebiet der Kunststoffverarbeitung und bat einen Spritzkopf zur Herstellung von Kunststoffolien mit Breitschlitzdüse und einer lediglich mit einer Stauoberfläche in den im Innern des Spritzkopfes den Kunststoffstrom leitenden Kanal hineinreichenden, im Sinne einer Querschnittsveränderung des Kanals verstellbaren Stauwand zum Gegenstand. The invention lies in the field of plastics processing and asked for an extrusion head for the production of plastic films with a slot nozzle and a only with a damming surface in the channel that conducts the plastic flow inside the spray head reaching in, in the sense of a cross-sectional change of the channel adjustable baffle to the object.
Spritzköpfe mit einer Breitschlitzdüse sind an sich bekannt. Sie werden z. B. dazu verwendet, die aus einer Schneckenpresse in Form eines im Querschnitt runden Stranges austretende Kunststoffmasse in eine mehr oder weniger dünne sowie mehr oder weniger breite Folie auszuformen. Zur diesem Zweck sind in das Innere des Spritzkopfes sogenannte Stauwände eingearbeitet, die den mittig eintretenden Kunststoffstrang zwingen, sich nach und nach im Sinne einer Verbreiterung in der einen Richtung und im Sinne einer Verengung in der dazu senkrechten Richtung umzuformen. Die endgültige Formgebung der Folie erfolgt am Austrittsende des Spritzkopfes durch eine starre oder gegebenenfalls auch einstellbare Schlitzdüse. Spray heads with a slot nozzle are known per se. You will e.g. B. used to the a screw press in the form of a round strand in cross-section emerging plastic compound into a to form more or less thin and more or less wide film. For this purpose, in the inside of the spray head incorporates so-called baffles that hold the plastic strand entering the center force yourself gradually in the sense of broadening in one direction and in the sense a constriction in the direction perpendicular thereto. The final shape of the film takes place at the outlet end of the spray head through a rigid or optionally adjustable slot nozzle.
Wesentlich für das Zustandekommen einer brauchbaren, über ihre ganze Breite gleich dicken und gleich dichten, verzerrungsfreien Folie ist dabei, daß die in Form eines Strangs in den Spritzkopf eingeführte Kunststoffmasse sich gleichmäßig über die ganze Breite der herzustellenden Folie verteilt. Dies zu erreichen ist deswegen schwierig, weil die Masse beim Durchtreten durch den Spritzkopf bestrebt ist, sich in Richtung ihrer ursprünglichen Strangform weiterzubewegen. Bei der Dimensionierung der die Verdrängung erzwingenden Stauwände ist man nun bisher so vorgegangen, daß zunächst mit einem grob hergestellten Spritzkopf und unter Verwendung der später zu verarbeitenden Kunststoffart Vorversuche angestellt wurden und im Verlauf dieser Versuche die Stauwände nach Form und Größe so lange nachgearbeitet wurden, bis der Spritzkopf eine zufriedenstellende Folie lieferte.Essential for the creation of a usable one, the same thickness and the same across its entire width The dense, distortion-free film is that which is introduced into the extrusion head in the form of a strand Plastic compound is evenly distributed over the entire width of the film to be produced. To achieve this is difficult because the mass tends to move through the spray head when it passes through To move in the direction of their original strand shape. When dimensioning the the displacement enforcing baffles one has now proceeded so that initially with a roughly manufactured Injection head and preliminary tests were carried out using the type of plastic to be processed later and in the course of these experiments, the shape and size of the retaining walls were reworked for so long until the die provided a satisfactory film.
Mit einem auf die geschilderte Weise empirisch hergestellten Spritzkopf kann man nun aber nur so lange einwandfreie Folien kontinuierlich herstellen, wenn sowohl die verarbeiteten Materialien als auch die Betriebsverhältnisse genau denjenigen entsprechen, die bei den Versuchen vorlagen. Änderungen der Viskosität, wie sie z. B. durch unterschiedliche Weichmachermengen im PVC sowie durch Einsetzen eines anderen Kunststoffes oder allgemein durch Temperaturschwankungen hervorgerufen sein können, oder Änderungen der SchiK-ckeudreli/.ahl bzw. der Ausstoßleistung haben zur Folge, daß eine Folie entsteht, die minderer Qualität oder gar unbrauchbar ist. Man war Spritzkopf mit BreitschlitzdüseWith a spray head empirically produced in the manner described, however, perfect films can only be produced continuously as long as both the processed materials and the operating conditions correspond exactly to those that existed in the tests. Changes in viscosity as they occur e.g. B. can be caused by different amounts of plasticizer in PVC as well as by the use of another plastic or generally by temperature fluctuations, or changes in the SchiK-ckeudreli / .ahl or the output result that a film is produced that is of inferior quality or even unusable . It was a spray head with a slot nozzle
zur Herstellung von Flachfolien,for the production of flat films,
insbesondere aus thermoplastischenespecially from thermoplastic
KunststoffenPlastics
Anmelder:Applicant:
Höppner & Schumann,
Oberlar bei Troisdorf, Moltkestr. 29 Höppner & Schumann,
Oberlar near Troisdorf, Moltkestr. 29
Theo Lang, Oberlar bei Troisdorf,
ist als Erfinder genannt wordenTheo Lang, Oberlar near Troisdorf,
has been named as the inventor
infolgedessen gezwungen, bei Änderung der Betriebsverhältnisse bzw. bei Verarbeitung anderer Kunststoffe die Fertigung zu unterbrechen, die Stauwände den veränderten Bedingungen anzupassen oder — in der Mehrzahl aller Fälle — einen neuen Spritzkopf einzusetzen, der aber zunächst in der oben geschilderten Weise den neuen Bedingungen entsprechend nachgearbeitet werden mußte. Die Nachteile, die somit den bekannten Spritzköpfen der in Frage stehenden Art anhaften, liegen auf der Hand.consequently forced to change the operating conditions or when processing other plastics to interrupt production, to adapt the barriers to the changed conditions or - in the Most of all cases - to use a new spray head, but initially in the one described above Way had to be reworked according to the new conditions. The disadvantages that the known spray heads of the type in question are obvious.
Um die Möglichkeit zu schaffen, einen Spritzkopf mit Breitschlitzdüse beim Verarbeiten von verschiedenartigen
thermoplastischen Kunststoffen bzw. bei sich ändernden Betriebsbedingungen den verschiedenen
Verhältnissen anzupassen, ist es bereits bekannt, unmittelbar vor dem Austrittsschlitz zwei verstellbare
Stauwände anzuordnen, die zwischen ihren eben ausgebildeten Schmalseiten einen über die ganze Ausdehnung
des Schlitzes gleich breiten horizontalen Zwischenraum einschließen, der durch Veränderung
des Plattenabstandes in seiner Breite einstellbar ist. Eine solche Anordnung ist jedoch nur vorteilhaft,
wenn die Vorrichtung so ausgebildet ist, daß die zugeführte Kunststoffmasse durch besondere Maßnahmen
bereits vor Eintritt in den flachen Raum zwischen den verstellbaren Platten annähernd auf Schlitzbreite verteilt
ist. Bei Spritzköpfen, in denen die in Strangform zugeführteKunststoffmasse im wesentlichen allein
durch die Wirkung der Stauwände nach beiden Seiten hin bis auf Schlitzbreite verteilt werden soll, muß sich
der Durchtrittsquerschnitt von der Strangmitte zu den Enden des Austrittsschlitzes hin ändern, und zwar ist
der notwendige Querschnittsverlauf von den Betriebsbedingungen bzw. von den verwendeten Kunststoffen
abhängig.
/ Der Erfindung liegt die Aufgabe zugrunde, einenIn order to create the possibility of adapting a spray head with a slot nozzle when processing different types of thermoplastics or when the operating conditions change to the different conditions, it is already known to arrange two adjustable baffles immediately in front of the outlet slot include the entire extent of the slot equally wide horizontal space, the width of which can be adjusted by changing the distance between the plates. However, such an arrangement is only advantageous if the device is designed in such a way that the supplied plastic compound is distributed approximately over the width of the slot by special measures before it enters the flat space between the adjustable plates. In the case of spray heads in which the plastic mass supplied in strand form is to be distributed to both sides up to the width of the slot essentially solely by the action of the retaining walls, the passage cross-section must change from the center of the strand to the ends of the outlet slot, namely the necessary cross-section of the operating conditions and the plastics used.
/ The invention is based on the object of a
/ Spntzk~öpT mit'Breitschlitzdüse zu schaffen, in dem/ Spntzk ~ öpT with a wide slot nozzle in which
909 707/318909 707/318
Claims (4)
Deutsche Patentschriften Nr. 616 080, 624 494,
826;Considered publications:
German patent specifications No. 616 080, 624 494,
826;
Publications (1)
Publication Number | Publication Date |
---|---|
DE1072378B true DE1072378B (en) | 1959-12-31 |
Family
ID=596860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT1072378D Pending DE1072378B (en) | Spray head with slot nozzle for the production of flat films, in particular from thermoplastics |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1072378B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3080608A (en) * | 1961-03-30 | 1963-03-12 | Jurian W Van Riper | Plastic material extrusion apparatus |
DE1179702B (en) * | 1960-03-10 | 1964-10-15 | Hermann Berstorff Maschb Ansta | Wide slot nozzle for thermoplastics, especially polyvinyl chloride |
US3212134A (en) * | 1961-07-06 | 1965-10-19 | Lucien D Yokana | Extrusion die assembly |
DE1218702B (en) * | 1963-08-27 | 1966-06-08 | Rheinstahl Henschel Ag | Device for adjusting a damming element in slot nozzles |
US3390432A (en) * | 1964-10-23 | 1968-07-02 | Rheinstahl Henschel Ag | Extrusion nozzle for plastic materials |
DE3839980A1 (en) * | 1988-11-26 | 1990-06-07 | Reifenhaeuser Masch | EXTRACTION TOOL FOR THERMOPLASTIFIED PLASTIC |
US5858096A (en) * | 1995-09-06 | 1999-01-12 | Voith Sulzer Papiermaschinen Gmbh | Application unit for the direct or indirect application of a liquid or pasty medium onto a moving material web |
-
0
- DE DENDAT1072378D patent/DE1072378B/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1179702B (en) * | 1960-03-10 | 1964-10-15 | Hermann Berstorff Maschb Ansta | Wide slot nozzle for thermoplastics, especially polyvinyl chloride |
US3080608A (en) * | 1961-03-30 | 1963-03-12 | Jurian W Van Riper | Plastic material extrusion apparatus |
US3212134A (en) * | 1961-07-06 | 1965-10-19 | Lucien D Yokana | Extrusion die assembly |
DE1218702B (en) * | 1963-08-27 | 1966-06-08 | Rheinstahl Henschel Ag | Device for adjusting a damming element in slot nozzles |
US3390432A (en) * | 1964-10-23 | 1968-07-02 | Rheinstahl Henschel Ag | Extrusion nozzle for plastic materials |
DE3839980A1 (en) * | 1988-11-26 | 1990-06-07 | Reifenhaeuser Masch | EXTRACTION TOOL FOR THERMOPLASTIFIED PLASTIC |
US5858096A (en) * | 1995-09-06 | 1999-01-12 | Voith Sulzer Papiermaschinen Gmbh | Application unit for the direct or indirect application of a liquid or pasty medium onto a moving material web |
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