FI61145B - Extruder foer behandling av saerskilt temperaturkaensliga plaster - Google Patents

Extruder foer behandling av saerskilt temperaturkaensliga plaster Download PDF

Info

Publication number
FI61145B
FI61145B FI790082A FI790082A FI61145B FI 61145 B FI61145 B FI 61145B FI 790082 A FI790082 A FI 790082A FI 790082 A FI790082 A FI 790082A FI 61145 B FI61145 B FI 61145B
Authority
FI
Finland
Prior art keywords
layer
extruder
cylinder
thermal conductivity
press cylinder
Prior art date
Application number
FI790082A
Other languages
English (en)
Other versions
FI790082A (fi
FI61145C (fi
Inventor
Reiner Schneider
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Publication of FI790082A publication Critical patent/FI790082A/fi
Publication of FI61145B publication Critical patent/FI61145B/fi
Application granted granted Critical
Publication of FI61145C publication Critical patent/FI61145C/fi

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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/84—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders by heating or cooling the feeding screws
    • B29C48/845—Heating
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • 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
    • B29C48/51—Screws with internal flow passages, e.g. for molten material
    • B29C48/515—Screws with internal flow passages, e.g. for molten material for auxiliary fluids, e.g. foaming agents
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/834—Cooling
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/84—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders by heating or cooling the feeding screws
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/84—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders by heating or cooling the feeding screws
    • B29C48/85—Cooling
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/9239—Screw or gear
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/924—Barrel or housing
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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

Landscapes

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

Description

-Τ·1 ΓΑΐ m1,KUULUTUSJUUKAISU ' „ . _ W (11) utlAggningsskrift 61 1 4 5 C Patentti uyönnelty 10 G6 1932 ^ Patent meddelat V-/ (51) Kv.lk?/lnt.CI.3 B 29 P 3/08 SUOMI—FINLAND (*) Ptt«nttlh*k«mut — PKancamMnilng 790082 (22) H»k*ml«p4Jvt — Antöknlnpdag 10.01.79 ' 1' (23) Alkupiivi — Glklghmdig 10.01.79 (41) Tullut lulktoakal — Blivlt offantilg ^2 07 79
Patentti· ja rekisterihallitus .... ........ , , .
... (+4) Nlhttvtkslpwon ) kuuLJulkatsun pvm. —
Patent· oeh registerstyreisen Amöktn uttmgd och utl.ikrift«n puMktrad 26.02.82 (32)(33)(31) Pyydetty etuoikeus —Begird prioritet n, Q1.78
Saksan Liittotasavalta-Förbundsrepubliken Tyskland(DE) P 2801U99-5 (71) Siemens Aktiengesellschaft, Berlin/Miinchen, DE; Wittelsbacherplatz 2, D-8OOO Munchen 2, Saksan Liittotasavalta-Förbundsrepubliken !fyskland(DE) (72) Reiner Schneider, Ebersdorf, Saksan Liittotasavalta-Förbundsrepubliken lyskland(DE) (7*0 Berggren Oy Ab (5*0 Suulakepuristin, jolla käsitellään lämpötilaan hyvin herkästi reagoivia muoveja - Extruder för behandling av särskilt temperaturkänsliga plaster
Esillä oleva keksintö kohdistuu suulakepuristimeen, jolla käsitellään lämpötilaan hyvin herkästi reagoivia muoveja, kuten esim. verkkoutuvaa polyeteeniä tai solupolyeteeniä kemiallisella paisutusaineella ja jossa on jäähdytys- ja kuu-mennuslaitteella varustettu puristinsylinteri, jossa on paineenkestävä seinäkerros sekä sisäpuolinen kulutuskerros.
Eräs tämäntapainen suulakepuristin on rakennettu niin, että puristinsylinterin materiaali ja mahdollisesti sen sisään järjestetty syöttöputki omaa pienemmän lämmönjohtavuuden kuin puristinsylinteriä ulkoa ympäröivän vaipan materiaali, joka vaippa on varustettu kuumennus- ja jäähdytyslaitteilla (DE-OS 23 59 901).
Muoveja käytetään entistä enemmän kaapelien ja johtojen eristykseen. Tällöin myös suulakepuristimien käyttö käy jatkuvasti yhä tärkeämmäksi. Markkinoilla olevissa suulakepu- 61145 ristimissä tunnetaan rakenteita, joissa puristinsylinterin lämpötila on säädettävissä, jolloin lämpötilan muutoksiin hyvin herkästi reagoivien muovien laatua voidaan osaksi optimoida. Tätä tarkoitusta varten puristinsylinterin alueella sovitetaan kuumennus- ja jäähdytyslaitteita (DE-hakemusjulkaisu 24 17 067).
Edelleen tunnetaan suulakepuristin, jonka sylinteriin on paremman lämmönjohtavuuden aikaansaamiseksi pituussuuntaisiin porauksiin sovitettu hyvän lämmönjohtavuuden omaavaa ainetta olevia sauvoja (DE-OS 17 29 384) . Tällä pyritään estämään se, että sylinterin jossakin alueessa syntyvä lämpöenergia olisi johdettava ulos.
Keksinnön tarkoituksena on parantaa hyvin lämpötilaherkillä muoviaineilla saavutettavissa olevaa laatua sen kautta, että puristettavan aineen ulkosivulla puristinsylinterin johdosta vallitseva lämpötila on säädettävissä vielä tarkemmin kuin tunnetuilla laitteilla. Tämän päämäärän saavuttamiseksi on keksinnölle tunnusomaista se, mikä on esitetty oheisessa patenttivaatimuksessa 1.
Näillä toimenpiteillä vältytään myös suulakepuristimien pelätyiltä "kuumilta pesäkkeiltä" eli kohdilta, joiden lämpötila on kohonnut hyvin korkealle. Lisäksi suulakepuristimessa, jossa on tällainen tasoittava kerros, ei enää ole kovinkaan ongelmallista, miten kuumennus- ja jäähdytyslaitteet on sovitettava suulakepuristimen ulkopinnalle.
Puristinsylinterin toiminta-alueiden tällaisen jaon ansiosta voidaan keksinnön rakenteellisessa toteutuksessa myös lämpötila-anturi sijoittaa puristinsylinteriin erityisen tarkoituksenmukaisesti. Tämä saadaan aikaan siten, että esim. läm-pöparien kärkien annetaan tarttua hyvän lämmönjohtavuuden omaavaan aineeseen. Tämän ansiosta liian voimakkaita lämpötilan vaihteluja ei varmasti pääse esiintymään, koska lämpöä hyvin johtava kerros jakaa lämmön tasaisesti sen ympäröimän muovin suunnassa.

Claims (2)

61145 Keksintöä selitetään seuraavassa yksityiskohtaisesti piirustuksessa kaaviollisesti esitetyn suoritusesimerkin avulla. Piirustuksen ainoa kuvio esittää pitkittäisleikkausta suu-lakepurstinsylinterin läpi. Puristinsylinterin 20 osapitkittäisleikkaus näyttää sen kolmikerroksista rakennetta. Varsinaisen puristinsylinterin muodostaa teräksinen seinäkerros 21, joka on mitoitettu siten, että se voi ottaa vastaan puristimen sisätilan 24 osaksi hyvin suuret paineet. Seinäkerros 21 on verhottu sylinterillä 22, joka on kuparia eli siis hyvän lämmönjohtavuuden omaavaa ainetta ja joka on puolestaan erotettu sisätilasta 24 kulumista kestävästä aineesta valmistetulla kulutuskerroksella 23. Puristinsylinterin 20 ulkpinnalle on sovitettu vuorotellen kuumennus- ja jäähdytyslaitteita 25 ja 26. Lämpöparin 8 kärki 9 ulottuu kerrokseen 22.
1. Suulakepuristin, jolla käsitellään lämpötilaan hyvin herkästi reagoivia muoveja, kuten esim. verkkoutuvaa polyetee-niä tai solupolyeteeniä kemiallisella paisutusaineella ja jossa on jäähdytys- ja kuumennuslaitteella (26, 25) varustettu puristinsylinteri (20), jossa on paineenkestävä seinä-kerros (21) sekä sisäpuolinen kulutuskerros (23)»tunnettu siitä, että paineenkestävän seinäkerroksen (21) ja sisäpuolisen kulutuskerroksen (23) väliin on järjestetty homogeeninen kerros (22), jolla on muihin kerroksiin verrattuna suurempi lämmönjohtavuus.
2. Patenttivaatimuksen 1 mukainen suulakepuristin, tunnettu siitä, että suuremman lämmönjohtavuuden omaavaan kerrokseen (22) työntyy ainakin yksi lämpöpari-kärki (9).
FI790082A 1978-01-11 1979-01-10 Extruder foer behandling av saerskilt temperaturkaensliga plaster FI61145C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2801499A DE2801499C3 (de) 1978-01-11 1978-01-11 Extruder zur Behandlung hochtemperaturempfindlicher Kunststoffe
DE2801499 1978-01-11

Publications (3)

Publication Number Publication Date
FI790082A FI790082A (fi) 1979-07-12
FI61145B true FI61145B (fi) 1982-02-26
FI61145C FI61145C (fi) 1982-06-10

Family

ID=6029487

Family Applications (1)

Application Number Title Priority Date Filing Date
FI790082A FI61145C (fi) 1978-01-11 1979-01-10 Extruder foer behandling av saerskilt temperaturkaensliga plaster

Country Status (4)

Country Link
CH (1) CH633219A5 (fi)
DE (1) DE2801499C3 (fi)
FI (1) FI61145C (fi)
GB (1) GB2012659A (fi)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166079A (en) * 1984-10-10 1986-04-30 Bp Chem Int Ltd Internally heated extruder screw for thermoplastic extrusion process
IT1191777B (it) * 1986-05-02 1988-03-23 Gaetano Piazzola Termoregolatore particolarmente studiato per cilindri di estrusori,presse ad iniezione,trafilatrici e macchine per la lavorazione di materia plastica in genere
AT393980B (de) * 1988-06-20 1992-01-10 Boehler Gmbh Verfahren zur herstellung von verbundstahlwerkstuecken und verbundstahlwerkstueck
DE3843576A1 (de) * 1988-12-23 1990-07-12 Jv Kunststoffwerk Verfahren und vorrichtung zur herstellung von kunststoffformteilen
GB8929145D0 (en) * 1989-12-22 1990-02-28 Elmatic Cardiff Ltd Improvements relating to heating units
GB2257607B (en) * 1989-12-22 1994-07-27 Elmatic Improvements relating to heat transfer units
DE4014408C1 (en) * 1990-05-04 1992-01-30 Buss Ag, Basel, Ch Heating materials during work process in closed work area - involves rotating work member, feeding gaseous heat carrier into handling zone and then removing gas
US5447190A (en) * 1993-02-04 1995-09-05 Nokia-Maillefer Sa Device and method for cooling an extrusion cylinder
EP0862981A1 (de) * 1997-03-07 1998-09-09 Ihne & Tesch GmbH Anordnung zur Beheizung und Kühlung des Extrusionszylinders von Kunststoffverarbeitungs-maschinen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263741A (en) * 1964-05-20 1966-08-02 John Williams Machinery Ltd Automatic temperature control system for extruding machines
DE1529918A1 (de) * 1964-06-23 1969-10-30 Frieseke & Hoepfner Gmbh Kunststoff-Schneckenpresse mit Messfuehlern fuer das Arbeitsgut
DE1729384B2 (de) * 1967-02-18 1976-06-24 Weber, Heinz, Dipl.-Ing., 8640 Kronach Vorrichtung zur waermeableitung von stellen hoher temperatur zu stellen niedriger temperatur einer kunststoff-schneckenstrangpresse
US3588956A (en) * 1968-12-16 1971-06-29 Phillips Petroleum Co Apparatus and method for controlling temperature in a feed screw
US3689182A (en) * 1970-03-27 1972-09-05 Midland Ross Corp Extruder providing radial and axial melt removal
CA1006602A (en) * 1972-12-13 1977-03-08 Crompton And Knowles Corporation Temperature control apparatus for extruders
DD103193A1 (fi) * 1973-04-23 1974-01-12

Also Published As

Publication number Publication date
FI790082A (fi) 1979-07-12
DE2801499A1 (de) 1979-07-12
GB2012659A (en) 1979-08-01
CH633219A5 (de) 1982-11-30
FI61145C (fi) 1982-06-10
DE2801499C3 (de) 1981-05-27
DE2801499B2 (de) 1980-08-28

Similar Documents

Publication Publication Date Title
FI61145C (fi) Extruder foer behandling av saerskilt temperaturkaensliga plaster
US11584051B2 (en) Device and method for producing a particle foam part
ES416843A1 (es) Procedimiento para reducir la incidencia de piel de lija durante la extrusion de un material polimero fundido forma- dor de piel de lija.
US2583330A (en) Apparatus for giving an internal gloss finish to a tube or the like of heat plastic material
WO1987006879A1 (en) Die-lip heater
US3357051A (en) Die for extrusion of double-wall of "tube-in-tube" type
GB997970A (en) Apparatus for simultaneously extruding plastic layers on a core
KR920007122A (ko) 열처리로
ES2176956T3 (es) Sistema de inyeccion de material compuesto en el interior de un molde de conformacion.
GB1056133A (en) Improvements in or relating to methods of and apparatus for extrusion
JP3465361B2 (ja) 押出成形方法
US3132377A (en) Deckle rod for an extrusion die
US5302411A (en) Process for vulcanizing insulated wire
IT202200020433A1 (it) Riscaldatore elettrico per macchine per lavorazioni industriali
KR20020042655A (ko) 용융가능한 재료를 가열하기 위한 장치
US5645867A (en) Heated distribution manifold
ES427883A1 (es) Procedimiento y aparato para enfriar un tubo en extrusion de material termoplastico.
GB947255A (en) Process and apparatus for the manufacture of flexible tubes of synthetic thermoplastic material with non-uniform thicknesses
SE512151C2 (sv) Kalanderanordning
US3773872A (en) Method of manufacturing a covered wire
GB783449A (en) Improvements in or relating to the extrusion of organic thermoplastic materials
CN106313455A (zh) 一种注塑用的挤压装置
FR2207016A1 (en) Extrusion of plastics pipes - with sensor for control of wall thickness
US5388976A (en) Wall thickness measuring device with calibration device
KR100857194B1 (ko) 원적외선이 방사되는 단열재용 필름 및 그 제조방법

Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: SIEMENS AKTIENGESELLSCHAFT