DE9104539U1 - Injection head for extruder systems for coating cylindrical strand products - Google Patents

Injection head for extruder systems for coating cylindrical strand products

Info

Publication number
DE9104539U1
DE9104539U1 DE9104539U DE9104539U DE9104539U1 DE 9104539 U1 DE9104539 U1 DE 9104539U1 DE 9104539 U DE9104539 U DE 9104539U DE 9104539 U DE9104539 U DE 9104539U DE 9104539 U1 DE9104539 U1 DE 9104539U1
Authority
DE
Germany
Prior art keywords
distribution channel
injection head
extruder systems
sleeve
coating
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.)
Expired - Lifetime
Application number
DE9104539U
Other languages
German (de)
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.)
GESELLSCHAFT fur ANLAGEN ZUR KUNSTSTOFFVERARBEITUNG MBH 4973 VLOTHO DE
Original Assignee
GESELLSCHAFT fur ANLAGEN ZUR KUNSTSTOFFVERARBEITUNG MBH 4973 VLOTHO DE
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 GESELLSCHAFT fur ANLAGEN ZUR KUNSTSTOFFVERARBEITUNG MBH 4973 VLOTHO DE filed Critical GESELLSCHAFT fur ANLAGEN ZUR KUNSTSTOFFVERARBEITUNG MBH 4973 VLOTHO DE
Priority to DE9104539U priority Critical patent/DE9104539U1/en
Publication of DE9104539U1 publication Critical patent/DE9104539U1/en
Priority to DE4211557A priority patent/DE4211557A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C48/15—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

Landscapes

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

Description

183/658183/658

Gesellschaft für Anlagen zur Kunststoffverarbeitung mbH, D-4973 Vlotho-ExterCompany for Plants for Plastics Processing mbH, D-4973 Vlotho-Exter

Spritzkopf für Extruderanlagen zum Ummanteln zylindrischer StrangprodukteInjection head for extruder systems for coating cylindrical strand products

Beschreibung:Description:

Die Erfindung betrifft einen Spritzkopf für Extruderanlagen 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 Einströmöffnung her entlang einer Herzkurve eingeleitet wird.The invention relates to an extrusion head for extruder systems for coating cylindrical extruded products, such as in particular pipes with a large cross-section, consisting of a sleeve through which the extruded product to be coated passes and a housing surrounding it, which form between them an annular distribution channel that feeds the coating material to a nozzle insert, into which the coating material is introduced from a lateral inlet opening along a heart curve.

Einrichtungen der vorgenannten Art führen in der Praxis wiederholt zu Schwierigkeiten, weil es oftmals damitFacilities of the aforementioned type repeatedly lead to difficulties in practice because they often involve

- 2 - 183/658- 2 - 183/658

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 Strangprodukte werden, weshalb es zwingend erforderlich ist, die Arbeitsweise der bekannten Verteilersysteme zu verbessern. It is not possible to apply the coating material to the extruded product in a uniform thickness. This essential quality requirement becomes more difficult to meet the larger the cross-sections of the extruded products to be coated, which is why it is imperative to improve the way the known distribution systems work.

Zur Lösung der bestehenden Aufgabe schlägt die Erfindung in erster Linie vor, daß innerhalb des zwischen der Pinole und dem Gehäuse befindlichen Verteilerkanals zu beiden Seiten der Herzkurve mindestens eine den Verteilerkanal 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 Merkmal 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 äußeren Durchmesser des Strangproduktes abnimmt, indem sich dadurch ein Druckanstieg im Verteilerkanal ergibt.To solve the existing problem, the invention primarily proposes that within the distribution channel located between the sleeve and the housing, at least one island surface is arranged on both sides of the heart curve, which additionally divides the distribution channel, whereby these island surfaces should preferably be located on the sleeve. In addition, the flow behavior of the coating material in the spray head can be influenced even more favorably if, according to a further feature of the invention, the ring-shaped distribution channel divided by the island surfaces is initially enlarged in diameter towards the nozzle insert while simultaneously reducing its cross-section, before it decreases to the outer diameter of the extruded product, thereby resulting in an increase in pressure in the distribution channel.

Beide Maßnahmen der Erfindung bewirken nicht nur ein gleichmäßigeres Fließen des Ummantelungsmaterials im Ver-Both measures of the invention not only result in a more uniform flow of the sheathing material in the

91 Oi 539.91 Oi539.

- 3 - 183/658- 3 - 183/658

teilerkanal zwischen der Pinole und ihrem Gehäuse, sondern als Folge davon läßt sich auch die Baulänge des Spritzkopfes verringern, was ebenfalls einen wesentlichen Vorteil darstellt.divider channel between the sleeve and its housing, but as a result, the overall length of the spray head can also be reduced, which is also a significant advantage.

Ein Ausführungsbeispiel des Anmeldungsgegenstandes wird nachfolgend anhand der Zeichnung beschrieben.An embodiment of the subject matter 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 darin angeordneten Pinole 2, die zwischen sich einen ringförmigen Verteilerkanal 3 bilden. In diesen Verteilerkanal 3 wird das Ummantelungsmaterial von einer seitlichen Einströmöffnung H 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 eines sowohl die Pinole 2 als auch den Düseneinsatz 6 durchsetzenden zylindrischen Strangproduktes, wie zum Beispiel im vorliegenden Falle eines Rohres 8, aufzutragen.The spray head for an extruder system for coating cylindrical strand products, shown in partial longitudinal section, consists of a housing 1 and a sleeve 2 arranged therein, which form an annular distribution channel 3 between them. The coating material is introduced into this distribution channel 3 from a lateral inflow opening H of the housing 1 along a heart curve 5 and then fed to a nozzle insert 6, which is fastened in an intermediate piece 7 placed on the housing 1. The nozzle insert 6 then serves to apply the coating material to the surface of a cylindrical strand product, such as a pipe 8 in the present case, which passes through both the sleeve 2 and the nozzle insert 6.

Um das Fließverhalten des Ummantelungsmaterials im Verteilerkanal 3 zu verbessern, ist die Pinole 2 zu beiden Seiten der Herzkurve 5 jeweils mit einer den Verteiler-In order to improve the flow behavior of the coating material in the distribution channel 3, the sleeve 2 is provided on both sides of the heart curve 5 with a

91 &EEgr; 539.91 &EEgr; 539.

- 4 - 183/658- 4 - 183/658

kanal 3 in Fließrichtung des Ummantelungsmaterials zusätzlich unterteilenden Inselfläche 9 versehen. Außerdem vergrößert sich im vorderen Bereich des Verteilerkanals 3 dessen Durchmesser unter gleichzeitiger Querschnittsverringerung 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 vorherigen Druckanstieg des Ummantelungsmaterials im Verteilerkanal 3 zur Folge hat. Auf diese Weise wird eine absolut gleichmäßige Verteilung des Ummantelungsmaterials im gesamten Verteilerkanal 3 und damit auch eine gleichmäßig starke Ummantelungsschicht auf der Oberfläche des Rohres 8 erreicht.channel 3 is provided with an island surface 9 that additionally divides the flow direction of the coating material. In addition, in the front area of the distribution channel 3, its diameter increases with a simultaneous reduction in cross-section towards 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 pipe 8, which results in a previous increase in pressure of the coating material in the distribution channel 3. In this way, an absolutely even distribution of the coating material in the entire distribution channel 3 and thus also an evenly thick coating layer on the surface of the pipe 8 is achieved.

Claims (2)

183/658 Gesellschaft für Anlagen zur Kunststoffverarbeitung mbH, D-4973 Vlotho-Exter Spritzkopf für Extruderanlagen zum Ummanteln zylindrischer Strangprodukte Ansprüche:183/658 Gesellschaft für Anlagen zur Kunststoffverarbeitung mbH, D-4973 Vlotho-Exter Injection head for extruder systems for coating cylindrical extruded products Claims: 1. Spritzkopf für Extruderanlagen 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 Einströmöffnung 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 Herzkurve1. Injection head for extruder systems for coating cylindrical extruded products, such as in particular pipes with a large cross-section, consisting of a sleeve through which the extruded product to be coated passes and a housing surrounding it, which form between them an annular distribution channel feeding the coating material to a nozzle insert, into which the coating material is introduced from a lateral inlet opening along a heart curve, characterized in that within the distribution channel (3) located between the sleeve (2) and the housing (1) on both sides of the heart curve ^539.^539. - 2 - 183/658- 2 - 183/658 (5) mindestens eine den Verteilerkanal (3) zusätzlich unterteilende Inselfläche (9) angeordnet ist.(5) at least one island surface (9) is arranged which additionally divides the distribution channel (3). 2. Spritzkopf für Extruderanlagen nach Anspruch 1, dadurch gekennzeichnet, daß sich die den Verteilerkanal (3) im Bereich der Herzkurve (5) teilenden Inselflächen (9) auf der Pinole (2) befinden.2. Injection head for extruder systems according to claim 1, characterized in that the island surfaces (9) dividing the distribution channel (3) in the region of the heart curve (5) are located on the sleeve (2). 3- Spritzkopf für Extruderanlagen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der von den Inselflächen (9) unterteilte ringförmige Verteilerkanals (3) zum Düseneinsatz (6) hin zunächst unter gleichzeitiger Querschnittsverringerung in seinem Durchmesser vergrößert ist, bevor dieser bis auf den äußeren Durchmesser des Strangproduktes (8) abnimmt.3- Injection head for extruder systems according to claim 1 or 2, characterized in that the annular distribution channel (3) divided by the island surfaces (9) is initially enlarged in diameter towards the nozzle insert (6) with a simultaneous reduction in cross-section, before it decreases to the outer diameter of the strand product (8). 91 04 5U91 04 5U
DE9104539U 1991-04-13 1991-04-13 Injection head for extruder systems for coating cylindrical strand products Expired - Lifetime DE9104539U1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE9104539U DE9104539U1 (en) 1991-04-13 1991-04-13 Injection head for extruder systems for coating cylindrical strand products
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 (1)

Application Number Priority Date Filing Date Title
DE9104539U DE9104539U1 (en) 1991-04-13 1991-04-13 Injection head for extruder systems for coating cylindrical strand products

Publications (1)

Publication Number Publication Date
DE9104539U1 true DE9104539U1 (en) 1991-07-25

Family

ID=6866291

Family Applications (1)

Application Number Title Priority Date Filing Date
DE9104539U Expired - Lifetime DE9104539U1 (en) 1991-04-13 1991-04-13 Injection head for extruder systems for coating cylindrical strand products

Country Status (1)

Country Link
DE (1) DE9104539U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042018A1 (en) * 1996-05-03 1997-11-13 Giuseppe Raia Process and device for drawing with calibrated extrusion precision tubular linings and tubes made of rubber, plastic and the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997042018A1 (en) * 1996-05-03 1997-11-13 Giuseppe Raia Process and device for drawing with calibrated extrusion precision tubular linings and tubes made of rubber, plastic and the like

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