DE9104539U1 - Injection head for extruder systems for coating cylindrical strand products - Google Patents
Injection head for extruder systems for coating cylindrical strand productsInfo
- 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
Links
- 239000011248 coating agent Substances 0.000 title claims description 18
- 238000000576 coating method Methods 0.000 title claims description 18
- 238000002347 injection Methods 0.000 title claims description 6
- 239000007924 injection Substances 0.000 title claims description 6
- 239000000463 material Substances 0.000 claims description 13
- 235000012438 extruded product Nutrition 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic 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
- B29C48/36—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)
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)
| 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 |
-
1991
- 1991-04-13 DE DE9104539U patent/DE9104539U1/en not_active Expired - Lifetime
Cited By (1)
| 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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