DE2617898C2 - Injection head for producing a tubular strand made of thermoplastic material - Google Patents

Injection head for producing a tubular strand made of thermoplastic material

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Publication number
DE2617898C2
DE2617898C2 DE2617898A DE2617898A DE2617898C2 DE 2617898 C2 DE2617898 C2 DE 2617898C2 DE 2617898 A DE2617898 A DE 2617898A DE 2617898 A DE2617898 A DE 2617898A DE 2617898 C2 DE2617898 C2 DE 2617898C2
Authority
DE
Germany
Prior art keywords
injection head
annular
piston
thermoplastic material
feed channel
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
Application number
DE2617898A
Other languages
German (de)
Other versions
DE2617898A1 (en
Inventor
Reiner Dipl.-Ing. 5205 St.Augustin Kader
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE2617898A priority Critical patent/DE2617898C2/en
Publication of DE2617898A1 publication Critical patent/DE2617898A1/en
Application granted granted Critical
Publication of DE2617898C2 publication Critical patent/DE2617898C2/en
Expired legal-status Critical Current

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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
    • B29C48/03—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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • 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
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams

Description

Die Erfindung bezieht sich auf einen Spritzkopf zum Herstellen eines schlauchförrnigen Stranges aus thermoplastischem Kunststoff, wie er mit den Merkmalen des Oberbegriffes des Anspruches 1 beschrieben ist.The invention relates to an extrusion head for producing a tubular strand made of thermoplastic material Plastic as described with the features of the preamble of claim 1.

Eine gattungsgemäße Vorrichtung ist bereits nach dem DE-GM 70 43 802 bekannt. Diese Vorrichtung hat den Nachteil, daß sich die Länge des in den Speicherraum mündenden Zufuhrkanals in Abhängigkeit von der Ring-Kolbenstellung ändert und somit unterschiedliche Verweilzeiten des plastischen Kunststoffes im Zufuhrkanal entstehen.A generic device is already known from DE-GM 70 43 802. This device has the disadvantage that the length of the feed channel opening into the storage space depends on the Ring piston position changes and thus different residence times of the plastic in the feed channel develop.

Zur Materialzuführung durch den Ringkolben in den Speicherraum ist beim Gegenstand des Patents 21 61 356 im Außenmantel des Doppelmantelkolbens ein zur Zylinderwand des Spritzkopfes und zur Zuführung des Extruders offener, gegenüber der Stirnfläche des Ringkolbens abgeschlossener und dem Hub des Ringkolbens entsprechender Längskanal angeordnet, welcher einen Durchgang zu dem der Stirnfläche des Ringkolbens abgewandten Ende des Zuführkanals aufweist. The subject of the patent is for the supply of material through the annular piston into the storage space 21 61 356 in the outer jacket of the double jacket piston to the cylinder wall of the spray head and to the feed of the extruder more open, closed off with respect to the end face of the annular piston and the stroke of the Ring piston arranged corresponding longitudinal channel, which has a passage to that of the end face of the Has annular piston facing away from the end of the feed channel.

Hierbei muß insbesondere bei Einspeisung durch nur einen Extruder das von außen als Vollstrang zugeführte Material teilweise mindestens den halben Umfang der Außenfläche des Ringkolbeninnenteils umströmen, um in den ringförmigen Zuführkanal zu gelangen und eine Ringform zu erhalten. Dieser relativ lange Strömungsweg kann zu Inhomogenitäten im Material führen und sich unter Umständen in unterschiedlichen Wanddicken des schlauchförmigcn Stranges auswirken. Bei Verwendung von zwei und mehr Extrudern verringern sich die Fließwege proportional zur Anzahl der Extruder.In this case, especially when feeding through only one extruder, the one fed in from the outside as a full strand must be used Material partially flow around at least half the circumference of the outer surface of the annular piston inner part to to get into the annular feed channel and to obtain an annular shape. This relatively long flow path can lead to inhomogeneities in the material and may have an effect in different wall thicknesses of the tubular strand. Using with two or more extruders the decrease Flow paths proportional to the number of extruders.

Der vorliegenden Erfindung liegt clic Aufgabe zugrunde, den Spritzkopf /.um Herstellen eines schlauchförmigen Stranges aus thermoplastischem Kunststoff nach Patent 2161 35b so zu verbessern, daß auch bei Maierial/ufUhrunt! durch nur einen Extruder das Umströmen der Außenfläche des Ringkolbeninnenteils auf möglichst kurzen Fließwegen erfolgen kann.The present invention is based on the object of the injection head to produce a tubular Strands made of thermoplastic material according to patent 2161 35b so that even with Maierial / ufUhrunt! by only one extruder the flow around the outer surface of the inner ring piston part can take place on the shortest possible flow paths.

Zur Lösung dieser Aufgabe wird ein Spritzkopf vorgeschlagen, wie er mit den Merkmalen des kennzeichnenden Teils des Anspruches 1 beschrieben istTo solve this problem, a spray head is proposed, as it is with the features of the characterizing Part of claim 1 is described

Bei Spritzkopf gemäß der Erfindung ist gewährleistet, daß mehrere Längskanäle entweder auf der Außenfläche der Pinole oder der Innenfläche des Ringkolbeninnenteils angeordnet werden können und sich damit dieWith the spray head according to the invention it is ensured that several longitudinal channels either on the outer surface of the quill or the inner surface of the inner ring piston part can be arranged and thus the

ίο Fließwege beim Umströmen der thermoplastischen Masse um das Ringkolbeninnenteil proportional zur Anzahl der Längskanäle verkürzen.ίο Flow paths when flowing around the thermoplastic Shorten the mass around the inner ring piston part in proportion to the number of longitudinal channels.

Zwar ist nach der DE-OS 20 50 563 eine Vorrichtung mit einem zentralen Zufuhrkanal bekannt, jedoch handelt es sich hierbei um einen Stegdornhalterkopf, bei dem der Kunststoff beim Ausstoßen aus dem Speicherraum von den Stegen des Dornhalters aufgeteilt wird. Es handelt sich hierbei also um eine andersartige und somit gattungsfremde Konstruktion.Although a device with a central feed channel is known from DE-OS 20 50 563, it is This is a bar mandrel holder head in which the plastic is pushed out of the storage space is divided by the webs of the mandrel holder. So it is a different one and thus a non-generic construction.

Die Erfindung wird an Hand der in den Zeichnungen dargestellten Ausführungsbeispielen näher beschrieben. Es zeigtThe invention is described in more detail with reference to the exemplary embodiments shown in the drawings. It shows

F i g. 1 eine Ausführungsform mit auf der Innenfläche des Ringkolbeninnenteils angeordneten Längskanälen;F i g. 1 shows an embodiment with longitudinal channels arranged on the inner surface of the inner ring piston part;

F i g. 2 eine Ausführungsform mit auf der Außenfläche der Pinole angeordneten Längskanälen.F i g. 2 shows an embodiment with longitudinal channels arranged on the outer surface of the quill.

Bei der in F i g. 1 dargestellten Ausführungsform strömt der thermoplastische Kunststoff vom Extruder 10 zunächst durch den Kanal 13 und nach Aufteilung inIn the case of the in FIG. 1, the thermoplastic material flows from the extruder 10 first through channel 13 and after dividing into

jo mindestens zwei Teilströme durch die entsprechende Anzahl Querkanäle 14 und auf der Innenfläche des Ringkolbeninnenteils 5 angeordneten Längskanälen 11 und den kreisförmigen Durchgängen 12 und gelangt nach Umströmen des Ringkolbeninnenteils 5 in den ringförmigen Zuführkanai 6.jo at least two partial flows through the corresponding Number of transverse channels 14 and longitudinal channels 11 arranged on the inner surface of the inner ring piston part 5 and the circular passages 12 and, after flowing around the annular piston inner part 5, enters the annular feed channel 6.

Bei der in F i g. 2 dargestellten Ausführungsform strömt der thermoplastische Kunststoff vom Extruder 10 zunächst durch den Kanal 13 und nach Aufteilung in mindestens zwei Teilströme durch die entsprechende Anzahl Qiierkanäle 14 und auf der Außenfläche der Pinole 2 angeordneten Längskanälen 11 und den kreisförmigen Durchgängen 12 und gelangt nach Umströmen des Ringkolbeninnenteils 5 in den ringförmigen Zuführkanal 6.In the case of the in FIG. 2, the thermoplastic material flows from the extruder 10 first through the channel 13 and after division into at least two partial flows through the corresponding Number of Qiierkanäle 14 and on the outer surface of the quill 2 arranged longitudinal channels 11 and the circular passages 12 and reaches after flow around of the annular piston inner part 5 into the annular feed channel 6.

Der Speicherraum ist mit Bezugszeichen 8 und das Ringkolbenaußenteil mit Bezugszeichen 4 angegeben.The storage space is indicated with reference number 8 and the outer ring piston part with reference number 4.

Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings

Claims (3)

Patentansprüche:Patent claims: 1. Spritzkopf zum Herstellen eines schlauchförmigen Stranges aus thermoplastischem Kunststoff nach Patent 21 61 356, bestehend aus einem Winkelspritzkopf der einen in Ausspritzrichtung verlaufenden und mit der Schneckenpresse durch einen ringförmigen zur Spritzdüse hin offenen Zuführungskanal verbundenen ringförmigen Speicherraum für den Kunststoff aufweist, wobei der Speicherraum mittels eines Kolbens in Richtung auf die Spritzdüse entleerbar ist, und bei dem der Zuführkanal innerhalb des Ringkolbens angeordnet ist, dadurch gekennzeichnet, daß der Spritzkopf einen in der Pinole (2) angeordneten zentralen Zuführungskanal (13) sowie von dort radial nach außen gerichtete Querkanäle (14) und Längskanäle (11) unö Auslaßöffnungen (12), die in den Ringkanal (6) des als Doppelmantelkolben (3) ausgebildeten Ringkolbens münden, aufweist1. Injection head for producing a tubular strand made of thermoplastic material according to patent 21 61 356, consisting of an angled injection head of one extending in the direction of injection and with the screw press through an annular feed channel open towards the spray nozzle having connected annular storage space for the plastic, the storage space can be emptied by means of a piston in the direction of the spray nozzle, and in which the feed channel is inside of the annular piston is arranged, characterized in that the injection head has an in the quill (2) arranged central feed channel (13) and radially outwardly directed from there Transverse channels (14) and longitudinal channels (11) unö outlet openings (12), which in the annular channel (6) of the as Open double jacket piston (3) formed annular piston, has 2. Spritzkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Längskanäle (11) auf der Außenfläche der Pinole (2) angeordnet sind.2. Injection head according to claim 1, characterized in that the longitudinal channels (11) on the outer surface the quill (2) are arranged. 3. Spritzkopf nach Anspruch 1, dadurch gekennzeichnet, daß die Längskanäle (11) auf der Innenfläche des Ringkolbeninnenteils (5) angeordnet sind.3. Injection head according to claim 1, characterized in that the longitudinal channels (11) on the inner surface of the annular piston inner part (5) are arranged.
DE2617898A 1976-04-23 1976-04-23 Injection head for producing a tubular strand made of thermoplastic material Expired DE2617898C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2617898A DE2617898C2 (en) 1976-04-23 1976-04-23 Injection head for producing a tubular strand made of thermoplastic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2617898A DE2617898C2 (en) 1976-04-23 1976-04-23 Injection head for producing a tubular strand made of thermoplastic material

Publications (2)

Publication Number Publication Date
DE2617898A1 DE2617898A1 (en) 1977-11-03
DE2617898C2 true DE2617898C2 (en) 1984-06-28

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Application Number Title Priority Date Filing Date
DE2617898A Expired DE2617898C2 (en) 1976-04-23 1976-04-23 Injection head for producing a tubular strand made of thermoplastic material

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1083765A (en) * 1976-12-01 1980-08-19 Gerd P. H. Lupke Apparatus for producing thermoplastic tubing
DE3026822C2 (en) * 1980-07-16 1985-02-21 Reiner Dipl.-Ing. 5205 St.Augustin Kader Angle spray head for making a hose
DE3822524A1 (en) * 1988-07-04 1990-01-11 Kautex Maschinenbau Gmbh METHOD AND DEVICE FOR PRODUCING HOLLOW BODIES FROM THERMOPLASTIC PLASTICS
ATE117932T1 (en) * 1990-06-01 1995-02-15 Mauser Werke Gmbh STORAGE HEAD FOR A BLOW MOLDING MACHINE.
DE4020819A1 (en) * 1990-06-29 1990-11-08 Bock Stefan Dipl Ing Fh STORAGE HEAD FOR THE PRODUCTION OF SINGLE OR MULTILAYER HOSE-OVER-HOSE STRUCTURED PREFORMS FROM THERMOPLASTICS
DE102015012937A1 (en) * 2015-10-01 2017-04-06 Kocher-Plastik Maschinenbau Gmbh Device for reducing the microbiological contaminants of container products

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7043802U (en) * 1900-01-01 Kader R Injection head for a device for producing a tubular strand from thermoplastic material
DE2050563A1 (en) * 1970-10-15 1972-04-20 Kader R Thermoplastics tube extrusion - with material passed round mandrel from above

Also Published As

Publication number Publication date
DE2617898A1 (en) 1977-11-03

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