DE1199488B - Two-part spray head for applying cover layers when producing plastic conveyor belts or the like. - Google Patents

Two-part spray head for applying cover layers when producing plastic conveyor belts or the like.

Info

Publication number
DE1199488B
DE1199488B DEP24727A DEP0024727A DE1199488B DE 1199488 B DE1199488 B DE 1199488B DE P24727 A DEP24727 A DE P24727A DE P0024727 A DEP0024727 A DE P0024727A DE 1199488 B DE1199488 B DE 1199488B
Authority
DE
Germany
Prior art keywords
spray head
conveyor belts
part spray
cover layers
channels
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
DEP24727A
Other languages
German (de)
Inventor
Lothar Cords
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.)
PEGULAN WERKE AG
Original Assignee
PEGULAN WERKE AG
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 PEGULAN WERKE AG filed Critical PEGULAN WERKE AG
Priority to DEP24727A priority Critical patent/DE1199488B/en
Priority to GB10623/61A priority patent/GB923208A/en
Publication of DE1199488B publication Critical patent/DE1199488B/en
Pending 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
    • B29C48/15—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
    • B29C48/156—Coating two or more articles simultaneously
    • 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
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • 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
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • 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

Landscapes

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

Description

Zweiteiliger Spritzkopf zum Aufbringen von Deckschichten beim Herstellen von Kunststoff-Förderbändern od. dgl.Two-part spray head for applying top layers during manufacture of plastic conveyor belts or the like.

Zum Herstellen endloser Preßmassebänder oder -bahnen mit Stoffeinlage unter Zuführung der Preßmasse auf beiden Seiten der zu überziehenden Einlage ist ein Mundstück für Strangpressen bekannt. Treffen dabei die seitlich zugeführten Materialströme im Mittelteil der Folien bzw. Schichten aufeinander, so kommt es an diesen Stellen leicht zu einer Nahtbildung und damit zu schwachen Stellen im Erzeugnis. Wird dagegen die Preßmasse dem Mundstück von einer Seite über der Stoffeinlage und von der anderen Seite unter der Stoffeinlage zugeführt, so kann über die Breite des durchlaufenden, zu ummantelnden Trägers keine gleichmäßige Beschichtung erzielt werden, da infolge der scharfkantig ausgebildeten, im Querschnitt gleichbleibenden Zuführungskanäle für die Preßmasse die Materialgeschwindigkeit und der Druck mit zunehmender Weglänge abfallen. Dieser Nachteil wirkt sich naturgemäß mit der Breite der Bänder immer stärker aus. Ferner treten bei dem bekannten Mundstück infolge seiner Schalenbauweise bei hohem Materialdruck unkontrollierbare elastische Verformungen und damit untragbare Beschichtungsschwankungen auf. Schließlich reicht auch die bei dem Mundstück vorgesehene Anordnung von Ventilen wegen ihrer lokalen Wirkungsweise für eine definierte Regelung des Materialflusses bei der Herstellung von Förderbändern nicht aus. For the production of endless molding compound belts or strips with a fabric insert while feeding the molding compound on both sides of the insert to be coated a die known for extrusion. Meet the laterally fed Material flows in the middle part of the foils or layers on top of one another, that's how it happens at these points easily to a seam formation and thus to weak points in the Product. If, on the other hand, the molding compound is applied to the mouthpiece from one side over the fabric insert and fed from the other side under the fabric insert, so it can be across the width of the continuous carrier to be coated does not achieve a uniform coating are, as a result of the sharp-edged trained, constant in cross-section Feed channels for the molding compound, the material speed and the pressure with decrease with increasing path length. This disadvantage naturally affects the width the ligaments get stronger and stronger. Furthermore occur in the known mouthpiece as a result its shell construction with high material pressure uncontrollable elastic deformations and thus intolerable coating fluctuations. After all, that's enough Arrangement of valves provided for the mouthpiece because of their local mode of action for a defined control of the material flow in the production of conveyor belts not from.

Ferner ist eine Einrichtung zur Herstellung von aus mindestens zwei Schichten bestehenden Verbundfolien bekannt, bei welcher mindestens zwei je mit Kunststoff zu beschickende Kammern an ein gemeinsames Düsenmundstück angeschlossen sind. Die Kammern sind dabei in beide Teile des zweiteiligen Spritzkopfes eingearbeitet, so daß bei hohen Drücken die Gefahr einer elastischen Aufweitung des Düsenmundstückes besteht. Außerdem besitzt die Einrichtung keine Stauleisten, sondern ein auswechselbares Futter, welches jedoch eine Regelung des Materialflusses während des Betriebs der Einrichtung nicht zuläßt. Furthermore, a device for producing from at least two Layers of existing composite films known, in which at least two each with Plastic to be charged chambers connected to a common nozzle mouthpiece are. The chambers are incorporated into both parts of the two-part spray head, so that at high pressures there is a risk of elastic expansion of the nozzle mouthpiece consists. In addition, the device has no stowage strips, but an exchangeable one Feed, which, however, regulates the flow of material during operation of the Facility does not allow.

Schließlich ist es an sich bekannt, zur Regelung des Masseflusses bei Breitschlitzdüsen mit mittig zugeführter Kunststoffmasse Stauleisten vorzusehen. Finally, it is known per se to regulate the mass flow For slot nozzles with a centrally fed plastic compound, damming strips are to be provided.

Zur Vermeidung der geschilderten Schwierigkeiten wird erfindungsgemäß ein zweiteiliger Spritzkopf zum Aufbringen von Deckschichten beim Herstellen von Kunststoff-Förderbändern od. dgl. vorgeschlagen, der dadurch gekennzeichnet ist, daß in der Grundplatte Zuführungskanäle, die mit zunehmender Entfernung vom Einlaß in Richtung zur Durchtrittsöffnung für den Förderbandkern verlaufen, sowie zwischen den Zuführungskanälen und der verstellbaren Bandführung verstellbare Stauleisten vorgesehen sind. Die Ausbildung der Grundplatte und der mit ihr verschraubten Frontplatte gestattet insbesondere, die Verformungskräfte in dem geschlossenen Rahmen der verbundenen Front- und Grundplatte aufzunehmen, ohne daß eine Keil- bzw. Hebelwirkung wie bei den bisher üblichen verschraubten Breitschlitzdüsen auftreten kann. In order to avoid the difficulties outlined, according to the invention a two-part spray head for applying cover layers when manufacturing Plastic conveyor belts or the like. Proposed, which is characterized in that that in the base plate feed channels, which with increasing distance from the inlet run in the direction of the passage opening for the conveyor belt core, as well as between the feed channels and the adjustable tape guide adjustable stowage bars are provided. the Formation of the base plate and the front plate screwed to it in particular allows the deformation forces in the closed frame of the connected Include front and base plate without a wedge or lever effect as with the previously usual screwed slot nozzles can occur.

Außerdem können in der Grundplatte Kanäle zur Kantenumspritzung vorgesehen sein. In addition, channels for edge encapsulation can be provided in the base plate be.

In der Zeichnung ist ein Ausführungsbeispiel eines Spritzkopfes gemäß der Erfindung schematisch dargestellt. In the drawing, an embodiment of a spray head is shown in FIG of the invention shown schematically.

F i g. 1 zeigt einen Spritzkopf in Stirnansicht, F i g. 2 im Querschnitt; in der F i g. 3 ist eine Vorderansicht der Grundplatte des Spritzkopfes dargestellt. F i g. 1 shows a spray head in an end view, FIG. 2 in cross section; in FIG. 3 is a front view of the base of the spray head.

In den Figuren ist mit 1 der Spritzkopf bezeichnet, der aus einer Grundplatte 2 und einer Frontplatte 3 besteht. Die Grundplatte 2 besitzt Kanäle 4 und 5, die parallel zur Breitschlitzdüse 6 verlaufen und denen die thermoplastische Kunststoffmasse aus Schneckenpressen, welche mit 7 und 8 angedeutet sind, zugeführt wird. Die Zuführungskanäle 4 und 5 verlaufen mit zunehmender Entfernung vom Einlaß in Richtung zur Durchtrittsöffnung 17 für den Förderbandkern. Die Breitschlitzdüse 6 ist durch Lippen 9 und 10, die an der Frontplatte 3 angebracht sind, gebildet. Sie sind durch Stellschrauben 11 verstellbar. In the figures, 1 denotes the spray head, which consists of a Base plate 2 and a front plate 3 consists. The base plate 2 has channels 4 and 5, which run parallel to the slot nozzle 6 and which the thermoplastic Plastic mass from screw presses, which are indicated with 7 and 8, supplied will. The feed channels 4 and 5 run with increasing distance from the inlet in the direction of the passage opening 17 for the conveyor belt core. The slot nozzle 6 is formed by lips 9 and 10 which are attached to the front plate 3. They can be adjusted using adjusting screws 11.

12 und 13 zeigen verstellbare Stauleisten zur Regulierung des Masseflusses. 14 und 15 sind Kanäle, die zur Kantenumspritzung dienen, wie sie beispielsweise bei der Herstellung von Förderbändern mit nahtloser Kunststoffummantelung notwendig ist. Mit 16 ist die Bandführung bezeichnet, durch deren Durchtrittsöffnung 17 der Förderbandkern, der im Spritzkopf mit Kunststoff beschichtet bzw. ummantelt werden soll, in den Spritzkopf 1 einläuft. Die Bandführung 16 kann mechanisch, hydraulisch oder elektrisch verstellt werden. Die Grundplatte 2 und die Frontplatte 3 sind durch Schraubenl8 verschraubt.12 and 13 show adjustable baffles for regulating the mass flow. 14 and 15 are channels that are used for edge molding, as they are for example necessary for the production of conveyor belts with seamless plastic coating is. With 16 the tape guide is designated, through its passage opening 17 the conveyor belt core, which is coated or sheathed with plastic in the spray head is to be, enters the spray head 1. The tape guide 16 can be mechanical, hydraulic or be adjusted electrically. The base plate 2 and the front plate 3 are through Screws l8 screwed.

Die Wirkungsweise des Spritzkopfes ist an sich bereits aus den Figuren ersichtlich. Die aus den Schneckenpressen 7 und 8 in den Spritzkopf 1 eintretende thermoplastische Kunststoffmasse wird durch die Kanäle 4 und 5 der Breitschlitzdüse 6 zugeführt, wobei der durch die Durchtrittsöffnung 17 einlaufende Träger ummantelt bzw. beschichtet wird. The mode of operation of the spray head can already be seen in the figures evident. The one entering the extrusion head 1 from the screw presses 7 and 8 thermoplastic plastic mass is through the channels 4 and 5 of the slot die 6, the carrier entering through the passage opening 17 being encased or is coated.

Soll beispielsweise eine zweischichtige Folie ohne Verwendung einer Trägerfolie hergestellt werden, so wird die Bandführung 16 durch einen massiven Dom ersetzt, über welchem die zweischichtige Folie im Spritzkopf gebildet wird. For example, if you want a two-layer film without the use of a Carrier film are produced, the tape guide 16 is through a massive Replaced dome, over which the two-layer film is formed in the spray head.

Für die Herstellung von Folien od. dgl. mit einer größeren Anzahl von Schichten können zusätzliche Schneckenpressen seitlich angeordnet werden und einen in entsprechender Weise erweiterten Spritzkopf speisen. For the production of foils or the like with a larger number of layers, additional screw presses can be arranged laterally and feed a correspondingly expanded spray head.

Claims (2)

Patentansprüche: 1. Zweiteiliger Spritzkopf zum Aufbringen von Deckschichten beim Herstellen von Kunststoff-Förderbändern od. dgl., bestehend im wesentlichen aus einer Grund- und Frontplatte, einer Breitschlitzdüse und parallel zur Düse geführten Zuführungskanälen für den Kunststoff, d a -durchgekennzeichnet, daßinderGrundplatte(2) Zuführungskanäle (4, 5), die mit zunehmender Entfernung vom Einlaß in Richtung zur Durchtrittsöffnung (17) für den Förderbandkern verlaufen, sowie zwischen den Zuführungskanälen (4, 5) und der verstellbaren Bandführung (16) verstellbare Stauleisten (12, 13) vorgesehen sind.Patent claims: 1. Two-part spray head for applying top layers in the manufacture of plastic conveyor belts or the like, consisting essentially consisting of a base and front plate, a slot nozzle and parallel to the nozzle Feed channels for the plastic, d a -characterized that in the base plate (2) Feed channels (4, 5), which with increasing distance from the inlet in the direction of Passage opening (17) for the conveyor belt core run, as well as between the feed channels (4, 5) and the adjustable tape guide (16) adjustable stowage bars (12, 13) are provided. 2. Spritzkopf nach Anspruch 1, dadurch gekennzeichnet, daß in der Grundplatte (2) Kanäle (14, 15) zur Kantenumspritzung vorgesehen sind. 2. Injection head according to claim 1, characterized in that in the Base plate (2) channels (14, 15) are provided for edge coating. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 859 368; deutsches Gebrauchsmuster Nr. 1 778 333; USA.-Patentschrift Nr. 2 813 301. Publications considered: German Patent No. 859 368; German utility model No. 1 778 333; U.S. Patent No. 2,813,301.
DEP24727A 1960-04-01 1960-04-01 Two-part spray head for applying cover layers when producing plastic conveyor belts or the like. Pending DE1199488B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEP24727A DE1199488B (en) 1960-04-01 1960-04-01 Two-part spray head for applying cover layers when producing plastic conveyor belts or the like.
GB10623/61A GB923208A (en) 1960-04-01 1961-03-23 Method and extrusion head for the production of multilayered flat films or sheets, bands or webs, conveyor belts and the like, from thermoplastic synthetic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP24727A DE1199488B (en) 1960-04-01 1960-04-01 Two-part spray head for applying cover layers when producing plastic conveyor belts or the like.

Publications (1)

Publication Number Publication Date
DE1199488B true DE1199488B (en) 1965-08-26

Family

ID=7369786

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP24727A Pending DE1199488B (en) 1960-04-01 1960-04-01 Two-part spray head for applying cover layers when producing plastic conveyor belts or the like.

Country Status (2)

Country Link
DE (1) DE1199488B (en)
GB (1) GB923208A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503541A1 (en) * 1991-03-15 1992-09-16 Bridgestone/Firestone, Inc. Extrusion head for producing tread plies for road vehicle tires
EP0724945A1 (en) * 1995-01-31 1996-08-07 BRIDGESTONE/FIRESTONE, Inc. Extrusion apparatus and method with pressure equalization
WO2000012286A1 (en) * 1998-08-27 2000-03-09 Ucb, S.A. Production of cellulose films

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5115552B1 (en) * 1971-06-23 1976-05-18
JPS5148170U (en) * 1974-10-05 1976-04-10
EP1997607B1 (en) * 2007-05-31 2011-03-23 Société de Technologie Michelin Device and method for insulating a set of yarns
CZ305409B6 (en) * 2011-07-26 2015-09-02 Univerzita Tomáše Bati ve Zlíně Extrusion head with inert flat slit of zero length
CN114131875B (en) * 2021-11-10 2022-06-24 浙江中聚材料有限公司 Production process and device of white solar cell packaging EVA (ethylene vinyl acetate) co-extrusion film

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE859368C (en) * 1949-03-17 1952-12-15 Alfred Wesnigk Mouthpiece for extrusion presses for the production of endless molding compound bands or strips with a fabric insert
US2813301A (en) * 1954-12-13 1957-11-19 Monsanto Chemicals Sheeting die
DE1778333U (en) * 1957-05-16 1958-11-27 Alkor Werk Karl Lissmann K G EQUIPMENT FOR THE PRODUCTION OF COMPOSITE FILMS CONSISTING OF AT LEAST TWO LAYERS.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE859368C (en) * 1949-03-17 1952-12-15 Alfred Wesnigk Mouthpiece for extrusion presses for the production of endless molding compound bands or strips with a fabric insert
US2813301A (en) * 1954-12-13 1957-11-19 Monsanto Chemicals Sheeting die
DE1778333U (en) * 1957-05-16 1958-11-27 Alkor Werk Karl Lissmann K G EQUIPMENT FOR THE PRODUCTION OF COMPOSITE FILMS CONSISTING OF AT LEAST TWO LAYERS.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503541A1 (en) * 1991-03-15 1992-09-16 Bridgestone/Firestone, Inc. Extrusion head for producing tread plies for road vehicle tires
US5259746A (en) * 1991-03-15 1993-11-09 Bridgestone/Firestone, Inc. Extrusion head
EP0724945A1 (en) * 1995-01-31 1996-08-07 BRIDGESTONE/FIRESTONE, Inc. Extrusion apparatus and method with pressure equalization
WO2000012286A1 (en) * 1998-08-27 2000-03-09 Ucb, S.A. Production of cellulose films

Also Published As

Publication number Publication date
GB923208A (en) 1963-04-10

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