AT211534B - Extrusion press - Google Patents

Extrusion press

Info

Publication number
AT211534B
AT211534B AT666058A AT666058A AT211534B AT 211534 B AT211534 B AT 211534B AT 666058 A AT666058 A AT 666058A AT 666058 A AT666058 A AT 666058A AT 211534 B AT211534 B AT 211534B
Authority
AT
Austria
Prior art keywords
screw
sleeve
extrusion press
mass
extrusion
Prior art date
Application number
AT666058A
Other languages
German (de)
Original Assignee
Solvic Ind Delle Materie Plast
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 Solvic Ind Delle Materie Plast filed Critical Solvic Ind Delle Materie Plast
Application granted granted Critical
Publication of AT211534B publication Critical patent/AT211534B/en

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
    • B29C48/505—Screws
    • B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
    • 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
    • B29C48/30—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
    • 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
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders

Landscapes

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

Description

       

   <Desc/Clms Page number 1> 
 



  Strangpresse 
 EMI1.1 
 

 <Desc/Clms Page number 2> 

 



   Zwischen dem Schneckenende und der Hülse 8 ist eine Lagerhülse 9 und zwischen dem Ende des Kegelstumpfes 2 und dem Spritzdom 3 ein weiteres Lager 10 angeordnet. 



     Durch Verändern   der Drehzahl und des Drehsinne der Hülse 8 lassen sich der Druck und die Auspressmenge der Masse in. weiten Grenzen einregeln. 



   Rotiert die Hülse 8 beispielsweise gegensinnig zur Schnecke   l,   dann werden hohe Gegendrücke erzeugt, was für den Fall der Verarbeitung von Stoffen von Bedeutung ist, die-wie beispielsweise im besonderen Fall der Polyolefine - während des Auspressens einer starken Schrumpfung unterliegen. 



   Die erfindungsgemässe Auspressvorrichtung gestattet ferner eine Filtrierung und ein Auswälzen der Masse in der gleichen Weise wie bei einer Walz- und Mischvorrichtung mit Zylindern. Zufolge des Profils der Höcker am konischen Auswälzteil ist jeglicher Verbleib der Masse in der Vorrichtung verhindert, da die Masse stets leicht aus der Vorrichtung entweichen kann. 



    PATENTANSPRÜCHE :    
1. Strangpresse zur Herstellung von Schläuchen aus thermoplastischem Material, bestehend aus einer Förderschnecke und einem Spritzkopf mit einem Düsenring und einem festen, zentral angeordneten   Spritzdom,   dadurch gekennzeichnet, dass der Spritzdom (3) am vorderen Ende einer   achseng1eih   mit der hohlen Förderschnecke   (1)   und innerhalb derselben ortsfest angeordneten, über das vordere Schneckenende hinausstehenden Hülse (7) befestigt ist und dass um diese Hülse (7) in der Bohrung der Schnecke   (1)   eine zweite Hülse (8) drehbar gelagert ist, die als Verlängerung der Schnecke   (1)   in einen am Spritzdorn (3) zentrisch gelagerten Kegelstumpf (2) mit gegen den Spritzkopf zunehmendem Durchmesser übergeht und von   einem,

   die Verlängerung des Zylinders der Schnecke (l)   bildenden, mit einer konischen Bohrung versehenen Teil (4) umgeben ist, wobei die Hülse (8) mit dem Kegelstumpf (2) unabhängig von der Förderschnecke   (1)   gleich-oder gegensinnig mit antreibbar ist.



   <Desc / Clms Page number 1>
 



  Extrusion press
 EMI1.1
 

 <Desc / Clms Page number 2>

 



   A bearing sleeve 9 is arranged between the screw end and the sleeve 8 and a further bearing 10 is arranged between the end of the truncated cone 2 and the injection dome 3.



     By changing the speed and the direction of rotation of the sleeve 8, the pressure and the amount of mass pressed out can be regulated within wide limits.



   If the sleeve 8 rotates, for example, in the opposite direction to the screw 1, then high counter-pressures are generated, which is important in the case of the processing of substances which - as for example in the special case of polyolefins - are subject to severe shrinkage during extrusion.



   The extrusion device according to the invention also allows the mass to be filtered and rolled out in the same way as in a rolling and mixing device with cylinders. As a result of the profile of the humps on the conical rolling part, any remaining of the mass in the device is prevented, since the mass can always easily escape from the device.



    PATENT CLAIMS:
1. Extrusion press for the production of hoses made of thermoplastic material, consisting of a screw conveyor and an injection head with a nozzle ring and a fixed, centrally arranged injection dome, characterized in that the injection dome (3) at the front end of an axis line with the hollow screw conveyor (1) and within the same stationary sleeve (7) projecting beyond the front end of the screw is attached and that around this sleeve (7) in the bore of the screw (1) a second sleeve (8) is rotatably mounted, which as an extension of the screw (1 ) merges into a truncated cone (2) centrally mounted on the spray mandrel (3) with an increasing diameter towards the spray head and from a,

   the extension of the cylinder of the screw (1) forming part (4) provided with a conical bore is surrounded, the sleeve (8) with the truncated cone (2) being able to be driven in the same direction or in opposite directions independently of the conveyor screw (1).

Claims (1)

2. Strangpresse nach Anspruch 1, dadurch gekennzeichnet, dass an der Aussenfläche des kegelstumpfförmigen Teiles (2) ein vorstehender Wulst (15) mit schraubenlinienförmigem Verlauf vorgesehen. ist, dessen Ganghöhe jener der Förderschnecke (1) entspricht und dessen abgerundetes Profil in Richtung gegen den Spritzkopf abnehmende Stärke besitzt. 2. Extruder according to claim 1, characterized in that a protruding bead (15) with a helical course is provided on the outer surface of the frustoconical part (2). is whose pitch corresponds to that of the screw conveyor (1) and whose rounded profile has decreasing strength in the direction towards the spray head.
AT666058A 1957-10-26 1958-09-23 Extrusion press AT211534B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT211534X 1957-10-26

Publications (1)

Publication Number Publication Date
AT211534B true AT211534B (en) 1960-10-25

Family

ID=11177523

Family Applications (1)

Application Number Title Priority Date Filing Date
AT666058A AT211534B (en) 1957-10-26 1958-09-23 Extrusion press

Country Status (5)

Country Link
AT (1) AT211534B (en)
BE (1) BE572394A (en)
DE (1) DE1140336B (en)
FR (1) FR1215692A (en)
GB (1) GB855362A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283496B (en) * 1965-03-19 1968-11-21 Salzgitter Maschinen Ag Conveyor screw for plastic injection molding machines

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289251A (en) * 1964-03-16 1966-12-06 Zimmermann & Jansen Gmbh Extruder (screw type) for the profiling of plastic materials i. e., plastics getters, earthy masses, etc.
FR2416105A1 (en) * 1978-02-03 1979-08-31 Sussex Plastics Engineering In Annular extrusion die - with rotating shear ring to provide pumping and shearing action, used esp. for high mol. PVC
GB2171952A (en) * 1985-03-08 1986-09-10 Extrudaids Ltd Improvements in extruder screws
GB2171951B (en) * 1985-03-08 1989-08-23 Robert Marven Improvements in extruder equipment.
DE8707265U1 (en) * 1987-05-20 1987-08-06 Ruhrchemie Ag, 4200 Oberhausen Extruder for the production of pipes and hollow profiles
DE3806020A1 (en) * 1988-02-26 1989-09-07 Rheydt Kabelwerk Ag EXTRUDER
US5648104A (en) * 1991-01-17 1997-07-15 The University Of Manchester Institute Of Science And Technology Extrusion die
DE10245306B4 (en) * 2002-09-27 2006-03-30 Berstorff Gmbh Extruder / gear pump assembly
CN106976218B (en) * 2017-04-18 2023-04-25 华南理工大学 Extrusion molding method and device for small-caliber pipe without weld mark

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009799B (en) * 1954-06-23 1957-06-06 Arthur Fuehrer Screw press
DE961211C (en) * 1954-08-27 1957-04-04 Heinrich Koch Maschinenfabrik Material guide arranged between the screw head and the caliber mandrel in the injection heads of screw presses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283496B (en) * 1965-03-19 1968-11-21 Salzgitter Maschinen Ag Conveyor screw for plastic injection molding machines

Also Published As

Publication number Publication date
GB855362A (en) 1960-11-30
FR1215692A (en) 1960-04-20
DE1140336B (en) 1962-11-29
BE572394A (en) 1900-01-01

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