DE1224472B - Method and device for the production of self-supporting cellulose films or thermoplastic plastic films - Google Patents

Method and device for the production of self-supporting cellulose films or thermoplastic plastic films

Info

Publication number
DE1224472B
DE1224472B DEB63692A DEB0063692A DE1224472B DE 1224472 B DE1224472 B DE 1224472B DE B63692 A DEB63692 A DE B63692A DE B0063692 A DEB0063692 A DE B0063692A DE 1224472 B DE1224472 B DE 1224472B
Authority
DE
Germany
Prior art keywords
nozzle
films
self
plastic
production
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
DEB63692A
Other languages
German (de)
Inventor
Bernard Victor Fox
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.)
British Cellophane Ltd
Original Assignee
British Cellophane Ltd
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 British Cellophane Ltd filed Critical British Cellophane Ltd
Publication of DE1224472B publication Critical patent/DE1224472B/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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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
    • 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
    • B29C48/25—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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0063—Cutting longitudinally
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Tubes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY

DEUTSCHESGERMAN

PATENTAMTPATENT OFFICE

AUSLEGESCHRIFTEDITORIAL

Int. Cl.:Int. Cl .:

B29dB29d

Deutsche KI.: 39 a3 - 7/02 German KI .: 39 a3 - 7/02

Nummer: 1 224 472Number: 1 224 472

Aktenzeichen: B 63692 X/39 a3File number: B 63692 X / 39 a3

Anmeldetag: 17. August 1961Filing date: August 17, 1961

Auslegetag: 8. September 1966Opening day: September 8, 1966

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur Herstellung von selbsttragenden Cellulosefilmen oder von selbsttragenden thermoplastischen Kunststoffilmen aus in Längsrichtung geteiltem rohrförmigen! Filmmaterial, bei dem der flüssige Kunststoff in einer Ringschlitzdüse, deren eine oder beide Düsenlippen um die Düsenachse drehbar oder schwenkbar sind, zu einem Rohr geformt und dieses dann verfestigt wird.The invention relates to a method and an apparatus for producing self-supporting Cellulose films or self-supporting thermoplastic synthetic films made from longitudinally divided tubular! Film material in which the liquid plastic in an annular slot nozzle, whose one or both nozzle lips are rotatable or pivotable about the nozzle axis, formed into a tube and this is then solidified.

Die bisher bekannten Ausführungen haben den Nachteil, daß das Schlitzen oder Spalten des rohrförmigen Filmmaterials erst dann erfolgt, wenn das Material schon verfestigt ist. Dadurch werden die Kanten des so gebildeten Filmes aber schartig oder rissig. Außerdem besteht die Gefahr, daß sich in ts den Filmen Schlieren oder Risse bzw. Streifen bilden. Ein weiterer Nachteil besteht darin, daß die Trennmesser bald durch das verfestigte Material stumpf werden, wodurch die Gefahr der Scharten- und Rissebildung noch erhöht wird.The previously known designs have the disadvantage that the slitting or splitting of the tubular Film material only takes place when the material has already solidified. This will make the Edges of the film formed in this way, however, are jagged or cracked. There is also the risk that ts streaks or cracks or streaks appear on the films. Another disadvantage is that the cutting knife soon become blunt due to the solidified material, which creates the risk of nicks and cracks is still increased.

Die Erfindung vermeidet diese Nachteile. Ihr liegt die Aufgabe zugrunde, die Aufteilung des Rohres in Längsrichtung zu einem Zeitpunkt vorzunehmen, zu dem das Rohr sich noch in flüssigem Zustand befindet.The invention avoids these disadvantages. It is based on the task of dividing the pipe in the longitudinal direction at a time when the pipe is still in the liquid state is located.

Die Erfindung löst diese Aufgabe dadurch, daß der flüssige rohrförmige Kunstoffstrom kontinuierlich an einer oder mehreren Stellen des Düsenschlitzes in Längsrichtung geteilt wird. Vorteilhaft sind dabei im Sinne der Erfindung als Trennmittel in oder am Düsenschlitz ein oder mehrere Trennfinger zum Teilen des flüssigen rohrförmigen Materialstromes vorgesehen.The invention solves this problem in that the liquid tubular plastic flow is continuous is divided in the longitudinal direction at one or more points of the nozzle slot. Advantages are im For the purposes of the invention as a separating agent in or on the nozzle slot, one or more separating fingers for Divide the liquid tubular material flow provided.

Die Erfindung hat den Vorteil, daß die Kanten des Filmes nicht schartig oder rissig werden und sich in den Filmen keine Schlieren oder Risse bzw. Streifen bilden. Außerdem werden die Trennmittel nicht so schnell abgenutzt bzw. schartig, als beim Trennen eines schon verfestigten Materials.The invention has the advantage that the edges of the film are not jagged or cracked and no streaks or cracks or streaks form in the films. In addition, the release agents not worn or jagged as quickly as when cutting an already solidified material.

Die Erfindung ist anwendbar bei der Herstellung von Filmen aus flüssigem filmbildendem Material, das fest wird, wenn es in ein Verfestigungsbad gegossen wird, wie insbesondere Cellulosefilm, der aus Viskose- oder Cuproxamlösungen gebildet wird, Filme aus Celluloseäthern, wie Methylcellulose, Äthylcellusoe oder Hydroxyäthylcellulose, Filme aus Celluloseestern, wie Celluloseacetat, Filme von polymeren Stoffen, wei Polyacrylnitril und Polymere mit Copolymere von Vinylharzen, Filme von proteinhaltigen Verbindungen, wie Kasein, und Filme von Alginaten. Die Erfindung ist ferner anwendbar bei der Herstellung von Filmen aus thermoplastischen Verfahren und Vorrichtung zur Herstellung von
selbsttragenden Cellulosefilmen oder von
thermoplastischen KunststoffilmenThe invention is applicable to the production of films from liquid film-forming material which solidifies when it is poured into a solidifying bath, such as in particular cellulose film formed from viscose or cuproxam solutions, films made from cellulose ethers such as methyl cellulose, ethyl cellulose or hydroxyethyl cellulose, Films made of cellulose esters such as cellulose acetate, films of polymeric substances such as polyacrylonitrile and polymers with copolymers of vinyl resins, films of proteinaceous compounds such as casein, and films of alginates. The invention is also applicable to the manufacture of films from thermoplastic processes and apparatus for the manufacture of
self-supporting cellulose films or of
thermoplastic plastic films

Anmelder:Applicant:

British Cellophane Limited,British Cellophane Limited,

Bridgwater, Somerset (Großbritannien)Bridgwater, Somerset (UK)

Vertreter:Representative:

Dipl.-Chem. Dr. W. KochDipl.-Chem. Dr. W. Koch

und Dr.-Ing. R. Glawe, Patentanwälte,and Dr.-Ing. R. Glawe, patent attorneys,

Hamburg 52, Waltzstr. 12Hamburg 52, Waltzstr. 12th

Als Erfinder benannt:Named as inventor:

Bernard Victor Fox,Bernard Victor Fox,

Bridgwater, Somerset (Großbritannien)Bridgwater, Somerset (UK)

Beanspruchte Priorität:Claimed priority:

Großbritannien vom 23. August 1960 (29 136),
vom 8. August 1961Great Britain of 23 August 1960 (29 136),
dated August 8, 1961

Stoffen, z. B. aus Polyäthylen, Polypropylen, Polyamiden, Polyestern u. dgl., die in heißem, flüssigem Zustand gepreßt und durch ein gasförmiges Kühlmittel oder ein Abschreckbad geleitet werden. Zwei oder mehr Filme können auch mit ihren Flachseiten nach dem Verfestigen aufeinandergelegt und zusammen in weiteren Behandlungsbädern behandelt werden. Ferner können die selbsttragenden Filme mit einem geeigneten Haftmittel versehen und aufeinandergeklebt werden, zwecks Bildung eines Schichtstoffes.Substances, e.g. B. made of polyethylene, polypropylene, polyamides, polyesters and the like. Which in hot, liquid State pressed and passed through a gaseous coolant or a quenching bath. Two or more films can also be laid on top of one another and together with their flat sides after solidification can be treated in further treatment baths. Furthermore, the self-supporting films with a suitable adhesive and glued together to form a Laminate.

In der Zeichnung ist ein Ausführungsbeispiel einer erfindungsgemäß ausgebildeten Vorrichtung dargestellt. Es zeigtIn the drawing, an embodiment of a device designed according to the invention is shown. It shows

F i g. 1 einen Längsschnitt durch die Vorrichtung,F i g. 1 a longitudinal section through the device,

F i g. 2 im vergrößerten Maßstab die rechte untere Ecke der Vorrichtung nach F i g. 1 nebst Trennfinger und Düsenschlitzende,F i g. 2, on an enlarged scale, the lower right corner of the device according to FIG. 1 plus separator finger and nozzle slot end,

F i g. 3 eine Ansicht von unten gegen das untere rechte Ende der F i g. 1, F i g. 3 is a view from below towards the lower right end of FIG. 1,

F i g. 4 einen Längsschnitt durch einen Teil eines das Verfestigungsbad enthaltenden Behälters mit eingehängter Vorrichtung nach der Erfindung in der Ansicht,F i g. 4 shows a longitudinal section through part of a container containing the solidification bath with a suspended one Device according to the invention in the view,

F i g. 5 einen Querschnitt durch das aus flüssigem Material bestehende Rohr undF i g. 5 shows a cross section through the tube made of liquid material and

F i g. 6 einen Grundriß eines Filmstreifens.F i g. 6 is a plan view of a filmstrip.

- -'- · 609 659/374- -'- · 609 659/374

Die in der Zeichnung dargestellte Vorrichtung besteht aus einer Ringschlitzdüse 1, die mittels Kugellager 2 drehbar in einem Gehäuse 3 gelagert ist und ihren Antrieb von einem Motor 4 über ein Zahnrädergetriebe 5 erhält.The device shown in the drawing consists of an annular slot nozzle 1, which by means of ball bearings 2 is rotatably mounted in a housing 3 and is driven by a motor 4 via a gear train 5 receives.

Die Ringdüse weist einen Träger 9 für die Düsenlippen 7, 8 auf. Dabei ist die Düsenlippe 8 mit ihrem Umf angsflansch 10 zwischen dem Flansch der Düsenlippe 7 und dem Träger 9 gelagert, an dem der Flansch der Düsenlippe 7 mittels Schrauben befestigt ist. Unterhalb des Flansches 10 befindet sich zwischen beiden Düsenlippen 7, 8 der Düsenschlitz 6, in den von unten an zwei sich gegenüberliegenden Stellen befestigte Trennfinger 17 hineinragen.The ring nozzle has a carrier 9 for the nozzle lips 7, 8. The nozzle lip 8 is with her Umf angsflansch 10 mounted between the flange of the nozzle lip 7 and the carrier 9, on which the The flange of the nozzle lip 7 is fastened by means of screws. Below the flange 10 is between two nozzle lips 7, 8 of the nozzle slot 6, in the two opposite locations from below attached separating fingers 17 protrude.

Der Flansch 10 hat mehrere Löcher 15 für den Durchtritt des Materialstromes, das über das Rohr 14, das umlaufende Anschlußstück 16, den Kanal 13 und den Ringkanal 12 zuströmt.The flange 10 has a plurality of holes 15 for the passage of the flow of material passing through the pipe 14, the circumferential connection piece 16, the channel 13 and the annular channel 12 flows towards it.

Nach F i g. 4 tritt der Materialstrom, durch die Trennfinger 17 in zwei Rohrhälften 19, 20 aufgeteilt, in das in dem Behälter 18 befindliche Verfestigungsbad, durch das die beiden Rohrhälften 19,20 zu selbsttragenden Filmen bzw. Filmstreifen 19', 20' verfestigt und über zylindrische Walzen 21, 22 zur weiteren Behandlung weitergeleitet werden.According to FIG. 4 enters the material flow, divided into two pipe halves 19, 20 by the separating fingers 17, into the solidifying bath located in the container 18, through which the two tube halves 19, 20 close self-supporting films or film strips 19 ', 20' solidified and over cylindrical rollers 21, 22 for further Treatment will be forwarded.

Durch das Überführen über die Walzen 21,22 werden etwaige, durch Unebenheiten im Düsenschlitz 6 auftretende Streifen 23 geglättet. Durch getrenntes Aufwickeln der Filmstreifen auf glatte zylindrische Rollen wird ferner erreicht, daß die Fihne nach dem Abwickeln nicht in Querrichtung wellig sind.As a result of the transfer over the rollers 21, 22, any unevenness in the nozzle slot is removed 6 appearing stripes 23 smoothed. By winding the film strips separately on smooth cylindrical ones Rolling is also achieved that the film does not wavy in the transverse direction after unwinding are.

Statt zwei können auch mehrere Trennfinger 17 vorgesehen werden. Sie können auch so angeordnet werden, daß sie mit ihren Enden nicht, wie dargestellt, in die Ringschlitze hineinragen, sondern davor enden. Die Trennfinger selbst können verschiedene Form haben.Instead of two, several separating fingers 17 can also be provided. They can also be arranged that way be that their ends do not protrude into the ring slots, as shown, but end before that. The separating fingers themselves can have different shapes.

Die Ringschlitzdüse kann statt kontinuierlich gedreht hin- und herbewegt werden. Die Lippenglieder 7, 8 können auch gedreht oder hin- und herbewegt werden. Dabei braucht nur eins der Lippenglieder 7,8 gedreht oder hin- und herbewegt zu werden.The ring slot nozzle can be moved back and forth instead of continuously rotated. The limbs of the lips 7, 8 can also be rotated or moved back and forth. Only one of the lip members needs 7,8 to be rotated or moved back and forth.

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zur Herstellung von selbsttragenden Cellulosefilmen oder von thermoplastischen Kunststoffilmen aus in Längsrichtung geteiltem rohrförmigen! Filmmaterial, bei dem der flüssige Kunststoff in einer Ringschlitzdüse, deren eine oder beide Düsenlippen um die Düsenachse dreh-• bar oder schwenkbar sind, zu einem Rohr geformt und das Rohr verfestigt wird, dadurch gekennzeichnet, daß der flüssige rohrförmige Kunststoffstrom kontinuierlich an einer oder mehreren Stellen des Düsenschlitzes in Längsrichtung geteilt wird.1. Process for the production of self-supporting cellulose films or of thermoplastic films Plastic films made from longitudinally divided tubular! Footage where the liquid Plastic in an annular slot nozzle, one or both of which can be rotated around the nozzle axis. are bar or pivotable, formed into a tube and the tube is solidified, characterized in, that the liquid tubular plastic flow continuously at one or more points of the nozzle slot in the longitudinal direction is shared. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, bestehend aus einer Ringschlitzdüse mit einem Antrieb zum Drehen mindestens einer der Düsenlippen sowie mit Trennmitteln zum Aufspalten des Kunststoffrohres in Längsrichtung, dadurch gekennzeichnet, daß als Trennmittel in oder am Düsenschlitz (6) ein oder mehrere Trennfinger (17) zum Teilen des flüssigen rohrförmigen Kunststoffstromes vorgesehen sind.2. Apparatus for performing the method according to claim 1, consisting of an annular slot nozzle with a drive for rotating at least one of the nozzle lips and with release agents for splitting the plastic pipe in the longitudinal direction, characterized in that as Separating means in or on the nozzle slot (6), one or more separating fingers (17) for dividing the liquid tubular plastic flow are provided. In Betracht gezogene Druckschriften:
USA.-Patentschrift Nr. 1 845 249.Considered publications:
U.S. Patent No. 1,845,249. Hierzu 1 Blatt Zeichnungen1 sheet of drawings 609 659/374 8.66 © Bundesdruckerei Berlin609 659/374 8.66 © Bundesdruckerei Berlin
DEB63692A 1960-08-23 1961-08-17 Method and device for the production of self-supporting cellulose films or thermoplastic plastic films Pending DE1224472B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29136/60A GB920805A (en) 1960-08-23 1960-08-23 Improvements in or relating to the manufacture of self-supporting flexible films

Publications (1)

Publication Number Publication Date
DE1224472B true DE1224472B (en) 1966-09-08

Family

ID=10286737

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB63692A Pending DE1224472B (en) 1960-08-23 1961-08-17 Method and device for the production of self-supporting cellulose films or thermoplastic plastic films

Country Status (2)

Country Link
DE (1) DE1224472B (en)
GB (1) GB920805A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748074A (en) * 1969-10-17 1973-07-24 H Nitta Apparatus for plasticizing thermoplastic synthetic resin

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845249A (en) * 1930-08-14 1932-02-16 Fiberloid Corp Method of extruding plastics

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845249A (en) * 1930-08-14 1932-02-16 Fiberloid Corp Method of extruding plastics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748074A (en) * 1969-10-17 1973-07-24 H Nitta Apparatus for plasticizing thermoplastic synthetic resin

Also Published As

Publication number Publication date
GB920805A (en) 1963-03-13

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