DE4211557A1 - Extruder head for coating cylindrical extrusions - has guide islands to improve flow distribution and give better coating thickness uniformity - Google Patents

Extruder head for coating cylindrical extrusions - has guide islands to improve flow distribution and give better coating thickness uniformity

Info

Publication number
DE4211557A1
DE4211557A1 DE4211557A DE4211557A DE4211557A1 DE 4211557 A1 DE4211557 A1 DE 4211557A1 DE 4211557 A DE4211557 A DE 4211557A DE 4211557 A DE4211557 A DE 4211557A DE 4211557 A1 DE4211557 A1 DE 4211557A1
Authority
DE
Germany
Prior art keywords
channel
coating
spray head
heart
flow distribution
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Withdrawn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
DE4211557A
Other languages
German (de)
Inventor
Erfinder Wird Nachtraeglich Benannt Der
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.)
ANLAGEN ZUR KUNSTSTOFFVERARBEI
Original Assignee
ANLAGEN ZUR KUNSTSTOFFVERARBEI
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
Priority claimed from DE9104539U external-priority patent/DE9104539U1/de
Application filed by ANLAGEN ZUR KUNSTSTOFFVERARBEI filed Critical ANLAGEN ZUR KUNSTSTOFFVERARBEI
Priority to DE4211557A priority Critical patent/DE4211557A1/en
Publication of DE4211557A1 publication Critical patent/DE4211557A1/en
Withdrawn legal-status Critical Current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
    • B29C48/50—Details of extruders
    • B29C48/695—Flow dividers, e.g. breaker plates
    • B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/154—Coating solid articles, i.e. non-hollow articles

Abstract

An extrusion head for coating cylindrical extrusions, esp. large dia. tubes, has an annular distribution channel formed between a mandrel and the housing. The coating material is introduced into the channel in a heart shaped inlet which has at least one additional diverting island surface. The island surface can be mounted on the mandrel. The distribution channel can at first increase in dia. while the cross-section is reduced and then reduce in dia. to suit the dia. of the article to be coated. USE/ADVANTAGE - The invention improves the flow distribution and gives a more uniform thickness of coating.

Description

Die Erfindung betrifft einen Spritzkopf für Extruderan­ lagen zum Ummanteln zylindrischer Strangprodukte, wie insbesondere Rohre größeren Querschnitts, bestehend aus einer von dem zu ummantelnden Strangprodukt durchsetzten Pinole und einem sie umgebenden Gehäuse, die zwischen sich einen das Ummantelungsmaterial einem Düseneinsatz zuführenden ringförmigen Verteilerkanal bilden, in den das Ummantelungsmaterial von einer seitlichen Einström­ öffnung her entlang einer Herzkurve eingeleitet wird.The invention relates to a spray head for extruders were for sheathing cylindrical strand products, such as especially pipes of larger cross section, consisting of one of the strands to be encased Quill and a surrounding housing that between the sheathing material is a nozzle insert form feeding annular distribution channel in the the sheathing material from a side inflow opening is initiated along a heart curve.

Einrichtungen der vorgenannten Art führen in der Praxis wiederholt zu Schwierigkeiten, weil es oftmals damit nicht gelingt, das Ummantelungsmaterial dem Strangprodukt in gleichmäßiger Stärke aufzutragen. Diese unabdingbare Qualitätsforderung läßt sich umso schwerer erfüllen, je größer die Querschnitte der zu ummantelnden Strangpro­ dukte werden, weshalb es zwingend erforderlich ist, die Arbeitsweise der bekannten Verteilersysteme zu verbes­ sern.Facilities of the aforementioned type lead in practice repeated to trouble because it is often with it  the sheathing material fails the strand product apply in even thickness. This indispensable Quality requirements are more difficult to meet, ever larger the cross sections of the strands to be encased products, which is why it is imperative that the Operation of the known distribution systems to verbes ser.

Zur Lösung der bestehenden Aufgabe schlägt die Erfindung in erster Linie vor, daß innerhalb des zwischen der Pi­ nole und dem Gehäuse befindlichen Verteilerkanals zu bei­ den Seiten der Herzkurve mindestens eine den Verteiler­ kanal zusätzlich unterteilende Inselfläche angeordnet ist, wobei sich diese Inselflächen vorzugsweise auf der Pinole befinden sollen. Darüber hinaus läßt sich das Fließverhalten des Ummantelungsmaterials im Spritzkopf noch günstig beeinflussen, wenn nach einem weiteren Merk­ mal der Erfindung der von den Inselflächen unterteilte ringförmige Verteilerkanal zum Düseneinsatz hin zunächst unter gleichzeitiger Querschnittsverringerung in seinem Durchmesser vergrößert ist, bevor dieser bis auf den äuße­ ren Durchmesser des Strangproduktes abnimmt, indem sich dadurch ein Druckanstieg im Verteilerkanal ergibt.The invention proposes to solve the existing problem primarily that within the pi nole and the distribution channel located at the case the sides of the heart curve at least one the distributor channel additionally dividing island surface arranged is, these island areas preferably on the Quill should be located. In addition, that Flow behavior of the coating material in the spray head still influence favorably if after another remark times the invention of that divided by the island areas annular distribution channel towards the nozzle insert initially while reducing the cross section in his Diameter is increased before this to the outside ren diameter of the strand product decreases by this results in an increase in pressure in the distribution channel.

Beide Maßnahmen der Erfindung bewirken nicht nur ein gleichmäßigeres Fließen des Ummantelungsmaterials im Ver­ teilerkanal zwischen der Pinole und ihrem Gehäuse, son­ dern als Folge davon läßt sich auch die Baulänge des Spritzkopfes verringern, was ebenfalls einen wesentlichen Vorteil darstellt.Both measures of the invention do not only effect one more uniform flow of the sheathing material in the ver  divider channel between the quill and its housing, son as a result, the overall length of the Reduce spray head, which is also essential Represents advantage.

Ein Ausführungsbeispiel des Anmeldungsgegenstandes wird nachfolgend anhand der Zeichnung beschrieben.An embodiment of the subject of the application is described below with reference to the drawing.

Der im teilweisen Längsschnitt abgebildete Spritzkopf für eine Extruderanlage zum Ummanteln zylindrischer Strangprodukte besteht aus einem Gehäuse 1 und einer dar­ in angeordneten Pinole 2, die zwischen sich einen ring­ förmigen Verteilerkanal 3 bilden. In diesen Verteiler­ kanal 3 wird das Ummantelungsmaterial von einer seit­ lichen Einströmöffnung 4 des Gehäuses 1 her entlang einer Herzkurve 5 eingeleitet und weiterhin einem Düseneinsatz 6 zugeführt, der in einem dem Gehäuse 1 aufgesetzten Zwischenstück 7 befestigt ist. Der Düseneinsatz 6 dient sodann dazu, das Ummantelungsmaterial der Oberfläche ei­ nes sowohl die Pinole 2 als auch den Düseneinsatz 6 durch­ setzenden zylindrischen Strangproduktes, wie zum Beispiel im vorliegenden Falle eines Rohres 8, aufzutragen.The spray head shown in partial longitudinal section for an extruder system for sheathing cylindrical extrudates consists of a housing 1 and a sleeve 2 arranged therein, which form a ring-shaped distribution channel 3 between them. In this distributor channel 3 , the sheathing material is introduced from a lateral inflow opening 4 of the housing 1 here along a heart curve 5 and continues to be fed to a nozzle insert 6 which is fastened in an intermediate piece 7 placed on the housing 1 . The nozzle insert 6 is then used to apply the sheathing material to the surface of both the sleeve 2 and the nozzle insert 6 by setting cylindrical extrudate, such as in the present case of a tube 8 .

Um das Fließverhalten des Ummantelungsmaterials im Ver­ teilerkanal 3 zu verbessern, ist die Pinole 2 zu beiden Seiten der Herzkurve 5 jeweils mit einer den Verteiler­ kanal 3 in Fließrichtung des Ummantelungsmaterials zu­ sätzlich unterteilenden Inselfläche 9 versehen. Außerdem vergrößert sich im vorderen Bereich des Verteilerkanals 3 dessen Durchmesser unter gleichzeitiger Querschnittsver­ ringerung zum Düseneinsatz 6 hin, bevor er anschließend im Zwischenstück 7 sowie im Düseneinsatz 6 bis auf den äußeren Durchmesser des Rohres 8 abnimmt, was einen vor­ herigen Druckanstieg des Ummantelungsmaterials im Vertei­ lerkanal 3 zur Folge hat. Auf diese Weise wird eine ab­ solut gleichmäßige Verteilung des Ummantelungsmaterials im gesamten Verteilerkanal 3 und damit auch eine gleich­ mäßig starke Ummantelungsschicht auf der Oberfläche des Rohres 8 erreicht.To prime channel 3 to enhance the flow behavior of the casing material in comparison, the quill is provided in each case 2 to either side of the heart cam 5 having a manifold channel 3 in the direction of flow of the jacket material to additionally dividing island surface. 9 In addition, in the front region of the distribution channel 3, its diameter increases with simultaneous reduction in cross section to the nozzle insert 6 , before it then decreases in the intermediate piece 7 and in the nozzle insert 6 to the outer diameter of the tube 8 , which results in a prior pressure increase of the casing material in the distribution channel 3 results. In this way, an absolutely uniform distribution of the sheathing material in the entire distribution channel 3 and thus also a uniformly thick sheathing layer on the surface of the tube 8 is achieved.

Claims (3)

1. Spritzkopf für Extruderanlagen zum Ummanteln zylin­ drischer Strangprodukte, wie insbesondere Rohre grö­ ßeren Querschnitts, bestehend aus einer von dem zu ummantelnden Strangprodukt durchsetzten Pinole und einem sie umgebenden Gehäuse, die zwischen sich einen das Ummantelungsmaterial einem Düseneinsatz zuführenden ringförmigen Verteilerkanal bilden, in den das Ummantelungsmaterial von einer seitlichen Einström­ öffnung her entlang einer Herzkurve eingeleitet wird, dadurch gekennzeichnet, daß innerhalb des zwischen der Pinole (2) und dem Gehäuse (1) befindlichen Verteilerkanals (3) zu beiden Seiten der Herzkurve (5) mindestens eine den Verteilerkanal (3) zusätz­ lich unterteilende Inselfläche (9) angeordnet ist.1. Spray head for extruder systems for sheathing cylindrical extrudate products, such as, in particular, pipes of larger cross-section, consisting of a quill penetrated by the strand product to be sheathed and a housing surrounding it, which form an annular distributor channel between them which supplies the sheathing material to a nozzle insert, into which casing material from one lateral inflow opening forth along a heart-shaped curve is introduced, characterized in that within the opening located between said sleeve (2) and the housing (1) the distribution channel (3) on both sides of the heart-shaped curve (5) at least one distributor channel (3 ) additional Lich dividing island surface ( 9 ) is arranged. 2. Spritzkopf für Extruderanlagen nach Anspruch 1, da­ durch gekennzeichnet, daß sich die den Verteilerkanal (3) im Bereich der Herzkurve (5) teilenden Insel­ flächen (9) auf der Pinole (2) befinden.2. Spray head for extruder systems according to claim 1, characterized in that the distribution channel ( 3 ) in the region of the heart curve ( 5 ) dividing island surfaces ( 9 ) are on the quill ( 2 ). 3. Spritzkopf für Extruderanlagen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der von den Inselflächen (9) unterteilte ringförmige Verteilerkanal (3) zum Düseneinsatz (6) hin zunächst unter gleichzeitiger Querschnittsverringerung in seinem Durchmesser ver­ größert ist, bevor dieser bis auf den äußeren Durch­ messer des Strangproduktes (8) abnimmt.3. Spray head for extruder systems according to claim 1 or 2, characterized in that the ring-shaped distributor channel ( 3 ) divided by the island surfaces ( 9 ) for the nozzle insert ( 6 ) is initially enlarged with a simultaneous cross-sectional reduction in its diameter before the latter except for the outer diameter of the strand product ( 8 ) decreases.
DE4211557A 1991-04-13 1992-04-06 Extruder head for coating cylindrical extrusions - has guide islands to improve flow distribution and give better coating thickness uniformity Withdrawn DE4211557A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4211557A DE4211557A1 (en) 1991-04-13 1992-04-06 Extruder head for coating cylindrical extrusions - has guide islands to improve flow distribution and give better coating thickness uniformity

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9104539U DE9104539U1 (en) 1991-04-13 1991-04-13
DE4211557A DE4211557A1 (en) 1991-04-13 1992-04-06 Extruder head for coating cylindrical extrusions - has guide islands to improve flow distribution and give better coating thickness uniformity

Publications (1)

Publication Number Publication Date
DE4211557A1 true DE4211557A1 (en) 1992-10-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE4211557A Withdrawn DE4211557A1 (en) 1991-04-13 1992-04-06 Extruder head for coating cylindrical extrusions - has guide islands to improve flow distribution and give better coating thickness uniformity

Country Status (1)

Country Link
DE (1) DE4211557A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104085096A (en) * 2014-07-03 2014-10-08 湖南紫皇冠新能源技术服务有限公司 Curtain coating die head with clothes-hanger-type structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343215A (en) * 1965-04-23 1967-09-26 Barmag Barmer Maschf Deflecting extruder head
EP0279321A2 (en) * 1987-02-14 1988-08-24 BEKUM Maschinenfabriken GmbH Co-extrusion head
FR2630963A1 (en) * 1988-05-04 1989-11-10 Alphacan Sa APPARATUS FOR THE EXTRUSION OF HOMOGENEOUS PLASTIC TUBES; PROCESS FOR MANUFACTURING HOMOGENEOUS TUBES USING THE APPARATUS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3343215A (en) * 1965-04-23 1967-09-26 Barmag Barmer Maschf Deflecting extruder head
EP0279321A2 (en) * 1987-02-14 1988-08-24 BEKUM Maschinenfabriken GmbH Co-extrusion head
FR2630963A1 (en) * 1988-05-04 1989-11-10 Alphacan Sa APPARATUS FOR THE EXTRUSION OF HOMOGENEOUS PLASTIC TUBES; PROCESS FOR MANUFACTURING HOMOGENEOUS TUBES USING THE APPARATUS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104085096A (en) * 2014-07-03 2014-10-08 湖南紫皇冠新能源技术服务有限公司 Curtain coating die head with clothes-hanger-type structure

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Free format text: GURR, ROLF, 4972 LOEHNE, DE

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