CS245044B1 - Charging device for plastics treatment machines especially for extrusion presses - Google Patents

Charging device for plastics treatment machines especially for extrusion presses Download PDF

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Publication number
CS245044B1
CS245044B1 CS825966A CS596682A CS245044B1 CS 245044 B1 CS245044 B1 CS 245044B1 CS 825966 A CS825966 A CS 825966A CS 596682 A CS596682 A CS 596682A CS 245044 B1 CS245044 B1 CS 245044B1
Authority
CS
Czechoslovakia
Prior art keywords
ring
cylinder
charging device
adjusting
treatment machines
Prior art date
Application number
CS825966A
Other languages
English (en)
Other versions
CS596682A1 (en
Inventor
Hans Jarausch
Siegfried Schreiter
Original Assignee
Hans Jarausch
Siegfried Schreiter
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 Hans Jarausch, Siegfried Schreiter filed Critical Hans Jarausch
Publication of CS596682A1 publication Critical patent/CS596682A1/cs
Publication of CS245044B1 publication Critical patent/CS245044B1/cs

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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
    • B29C48/25—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
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • 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
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/286—Raw material dosing
    • 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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/38—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in the same barrel
    • 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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/385—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate barrels
    • 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
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
    • 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
    • B29C48/72—Feedback means, i.e. part of the molten material being fed back into upstream stages of the extruder
    • 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
    • B29C48/76—Venting, drying means; Degassing means
    • 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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Description

-2-
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HecMOTpH Ha το, hto ajih onpefleJieHHax TexHojiornnecKHx sadami0Μθβτ Μβοτο ηο0306τκη&η j^erasanaa b pacnjiaBJíeHHOM coctobhkh .Máčen, BaKKyM, ηριυιοκθΗΗΗϋ κ 3arpy3onnoMy ycTpoftcTBy, oKasn-BaeT npoT0BOfleficTB0e cnocoÓHocTH k 3arpy3Ke nopouiKoodpa3HHxiuiacTMacc 0 cymecTBeHHO orpaMraiBaeT CTeneHB 3anojujeH0HnJiacT00Hpyioii[HX ηθρβηκοβ. 245044 -4-
UeJIL· Κ300ρβϊβΗΗΗ ΙΙ,ολβ H30ÓpeTeHKH saKmoaaeTCH b tom, hto ripn 3arpy3Ke yiíeHB-iuktb TGxiiHHecKiie 3aTpaTH na npoBe^eane ;xex'a3au,HE njiacTMaccC HeóOJíBFJKM HaCHUHHM BGCOM, yjiyHUMTB KaHGCTBO OKCTpyflaTa,a thkhg noBixcíiTB pa3rpy30HHyio πρ0Η3Β0ΑΗΤθΛΒΗ00ΤΒ 3a chgtcTatínjiK3aiíHH npouecca 3KCTpy3Hn. H3JioKenMe cyiunocTií H30ÓpereHim 3aj(aua jí3o6pgtghiih saiumaeTCH b tom, htoóh co3ňaTB 3arpy3on-HOe yCTpoiíCTBO CO ΟΤΟΠΟρΗΗΜ ΗβρΒΒΚΟΜ, KOTOpoe np0H3B0JlHT y,na-.nenne ΒΐυηοΗβΗΗϋ B03jiyxa b 30He npe,HBapHTejiBHoro ynaorneHHHnjiacTi.iaccH b ctohophom njunuyipe h xiobuchtb οτθπθηβ Kanojine-HI1H CMCTei.M IJJiaCTlffi,aU,MH.
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CooTBeTCTBywffi Ηβρτκκ noKa3UBaeT:
Pa3pe3 3arpy3OHHoro ycTpoňcTBa. M3odpaxeHiie pa3pe3a noKa3UBaeT 3arpy3OHHoe ycTpoiícTBO, pac-ποΛοκβΗΗΟθ Ha 3arpy3OHHOM oTBepcTHH ipuiHHUpa 3KCTpy£epa I.Jvih 3arpy3KH sKCTpyňepa 3arpy3OHHaH BOpOHKa 5 ηηποληηθτοηHMesmeiicK ujiacTMaccoů b BUfte nopoimta hjih arjiowepaTa c He-dOJIBUDIM HaCHIlHUM BCCOM H ft7IH ΠΟΒΗΙΙΙβΗΗΗ ΟΤβΠΘΗΗ ΗΗΠΟΛΗΘΗΗΗHepBHKa 3K.CTpy.nepa 2 npeABapKTeJiBHO yiuioTHaeTCfl πρκ homoihhΟΤΟΒΟρΗΟΓΟ UIHeKa 4 B ΟΤΟΠΟρΗΗΜ mUIHHJHP 3. 245044 .6. B CTonopnoM muHHflpe 3, βηποληοιιηομ b bw B03AyxonpoHHuae-Moro pmiHHjípa , προκοχο^κτ y^ajicHne coflepz.auierocH b ruiacTMacceBoaflyxa sa cněT npc.UBapiiTejiBHoiO c?.:a'i'Z.q. CTOnOpHUii UHJIllimp 3 , ftJIH 3T0fi IJ.e.UH, ΒΗΒΟΛΠΟΗ M3 WlIlH/pHneC-khx κοΛβίξ 9, KOTopue 3a chct ueiiTpupyramix KOJieix II Bi.cecTe cpa^HajrtHHMH oTBepcTítfflvM .nerasaiviH 12, pacriomoxeHHUMH nonepwi.ieTpy tokem odpasoM, οϊηοοητθλβηο Apyr jtpyra, hto i«myUOEHApHHecKHMW kojiei^.mm 9 hmjotch y3K«e Kojitueoópasnue mejin 10,KOTopue cnocoócTByioT y^ajieiiiuo B03jjyxa 113 njiacTiwecKoro waTepna-jia b nponecce npejxBapnTe.ai>Horo cxtmia. Πριι riožáouiH qpiaHneB 6, 7 h óojitob 8 njunnyipmiecKiie Kojitpa 9 hneHTpnpyniyie KOJi&ua II coejpiHeHH weamy codoíi. Ιίοηΐξπρκηβοκιιβ kojím# 9 KtferoT acHM.íeTpKHHoe nonepenHoe cene-mie, TaKW oópa3OM, ητο uneeT κθοτο KowiwecKoe pacurapeHne boBHeuiíWKJ CTopoHy KOJn>neodpa3Hoň menu 10.
PacunipeKiie kojím# oópa3Hoií mejm .lym npejroTBpameHH# ynajieHim hjih3axBaTa nacTn# bhjih b nponecce y,najieHHH B03flyxa K3 njiacTwaccHanpaBJíenMe nohami CTonopnoro uměna 4 nanpaBJíeHo b npoTiisono-jioxieKHyio CTopoHy. ípyTKM MeporipwKeM kw. yROJieauíi B03nyxa h npe£OTBpameHRH bu-xo.ua nacTim πηλη b nponecce ynaneHHH B03,nyxa 3aKJiKmaeTCH bTOM, HTOdU Μ3ΜΘΗΗΤΒ UffipMHy KOJILIteodpaSHOH U#JIH 10 TOKIIM Odpa-3OM, HTodu jyícTaHunoHHue mandu 13, Hwewie onpenejiěHHyio toji-mimy ii pacnojioKeHHue Meawy nnjiEHjipHnecKHMH KOJiLnai.m 9 h ηβητριι—pywatKMH KOJibpaMH II , μογλη du duTB 3aMeneHU ^ynír.ni. ΟτοηορΗΗΗ muíMHAP 3 OKpyKěH muiWpnnecKHLi KoscyxoM 14, Haxo-jubuhmch weamy $JiaHnaMH 6, 7, noToputi ocHaněH noflBOjwiM uiTy-nepoi.i 16 ftiifl nojiBOňa npojiyBonHoro B03jjyxa n οτβοληημ uiTyne-poM 18 c TpyóonpoBOflOM odpaTHOfi n onanii 19 b 3arpy3onHuňdyHKep 5. 245044 -7- B npoeTpaHCTBe Meawy οτοπορΗΗΜ φϋΐκΐί^φΟΜ 3 h ixoHHjypiwecKHMKOKyxow 14 pacnojioxena HanpaBJíínomaH cmpa/iB 15, κοτορρκΠΡ0Η3Β0ΛΗΤ paBHOMepHOe ρβΟΠρβΑΘΛβΗΗβ UOTOKa npOJQTBOMHOrOB03syxa Boicpyr CTonopHoro ujumHj^pa 3 λλη τογο, htoóh bnpouecce OTBO.ua B03,nyxa K3 njiacTi.iacc H3 οτΒβροτϋΜ x 0TB0.ua B03flyxa 12 βμχοληιι’κθ ηηοτκβη bujím nepea TpyóonpoBoaoópaTHoií nojiaBH 19 odpaTHo bbocth b 3arpy3oaHhífi ÓyHKep 5. 245044 •8—
<&amp;opwyjia H3óópeTeHHH 1. 3arpy3OHHoe ycTpoňcTBO rm. mhuihh no nepepadoTKe iuiacTH-necKiix MaTepwaJioB, b ocodeHHocTH 3KCTpyflepa, coctoíit H33arpy3OHHoro óyHKepa co οτοπορωίΜ ihuihhjípom η οτοπορΗΗΜuineKOM, pacnojiOjKeHHiíM Ha muiiiHjípe sKCTpyaepa, OTJiRawůcaΤβΜ, ΉΤΟ ΟΤΟΠΟρΗΗϋ UHJMHUP (3) Η3Γ0Τ0ΒΛβΗ H3, ΠΟ KpaflHefiwepe, οληογο φυΐΗΗΛΡΚΗβοκοΓΟ KOJitua (9), κοτοροβ πρη πο-μολη, no KpafiHeít Mepe, οληογο ueHTpnpyMmero KOJima (II),Hweiomero οτΒβροτκΗ λλη OTBO.ua B03,nyxa (12), pacnojioxeHHO-ro Ha KOHnax cTonopHoro muiHHjipa (3) h y^ajiěHHoro ot$jiaHueB (6; 7) npit nowioinH 0ολτοβ (8) τηκημ odpaeoM, hto b cTeHKe umiHH^pa odpaeoBajiocB dH, no KpaňHe® Mepe, οληβKOJHE>iíéodpa3HaH tqeJTB (10) h htoóh itmaiH^PKHecKiiS Koxyx (14),pacnojioaceHHHž Meamy Φληηηημη (6,7) ΒΜβοτβ co uiTyiíepaMii(16; 18) h HanpaBJunomefi cnupajiBio (15) κοηλθητρηηηο oKpyxajiCTOnopHHÍi HHJIHHJ^p (3) . 2. 3arpy3OHHoe ycTpoftcTBO no nyHKTy I, OTJiiwaeTCH τβΜ, htoHiuiiumpHHecKoe kojibuo (9) ημθθτ acuMMeTpinHoe nonepenHoeceneHHe h KOHanecKoe pacnrapeHiie KOJií>ueodpa3Hož mém (10)b HapyxHy» CTopoHy, 3. 3arpy3OHHoe ycTpoĚcTBO no nyHKTaM.I n 2, OTJHwaeTOH τθμ,hto Mesmy UHJiHHj^pnaecKHM kojihjom η ixeHTpnpyiomHM kojibuom(9; II) pacnojioxeHa, no KpaSflefi Mepe, o^Ha jnacTaHiíHOHHaa maftda (13), κοτορβκ MoaceT duří. 3aMeHéHa. 245044 -9- AHHOTaifllg ( Ρθ3Κ)ΜΘ ) 3arpy3OHHoe ycTpoĚCTBO msiuhh no nepepadoTKe njiacTHnecKHxwaTepnaJiOB, b ocodeHHocTH sKCTpy^epa
IfeodpeTeHne KacaeTCfl 3arpy3onnoro ycTpoiícTBa, ocodeHHO jyiHoKCTpynepa rjw ηρΗΓοτοΒΛβΗκη miacTMacc c HedojituniM HacnnHHMB6C0M.
Ifejit H3odpoT6HM 3aKJnonaeTCfl b yMeHLuieHim τθχηϊμθοκηχ saT-paT b nponecce OTBO^a BO3jjyxa H3 njiacrnnecKHx MaTepnaJiOB cHedojiBuiHM HacunHiiM bscom npn 3arpy3Ke 3KCTpynepa n byjiynuieni™ xanecTBa 3KCTpy,naTa. 3a£aneii H3odpeTeHna ηβληοτοβ οο3ληηκθ 3arpy3onHoro ycTponcT-Ba CO CTOnopHHM WHGKOM, KOTOpHH y^aJIHOT BKJIOTeHHH B03flyxaK3 njiacTMacc b cronopnoM muiwpe η ποβηοητ CTeneHb ηθπολ-ΗΘΗΚΚ CHCTOMU nJiaCTHKaííHH.
PeineHHe, corjiacHO H3odpeTeHioo, npenycMaTpHBaeT cosnanne στο-π ΟρΗΟΓΟ HHJIHHJipa H3 XIHJIHHflpH^eCKHX ΚΟΛΘΧΪ H ΠρΗ ΠΟΜΟΙξΗ ρβΗΤρΗpyrannx Kojxep pacnojioraTB hx TaraiM odpa3OM, πτοΰκ m.iejincBy3Kne KOJiBn,eodpa3Hne mejia., CTonopHra ruuiHH£p OKpyjKěH nnJfflHflpHnecKHM KoxyxoM, κοτορκηsanojiHaeTca nponyBOHHHM BO3,nyxoM jyiH ynajiemta BHXoflnmefinjiacTMaccoBofi nuzní b nponecce OTBOfla BO3nyxa H3 KOJii>neoópa3-hhx mejien.
Mexny οτοπορΗΗΜ pujnumpoM h KOJsyxoM inuninnpa ημθθτοη Ha-npaKinKman crnipajit jyin npoflyBonHoro BO3^yxa.
K 3T0My οΜοτρκ pncyHOK 245044

Claims (3)

  1. 245044 1 0 přebmSt V Ϊ H í1 B Z B
    1. Plnicí zařízení pro stroje na zpracování plastických hmot, zejména k výtlačnýmlisům, se skládá z plnicího zásobníku se stavěcím válcem a stavěcím Šnekem, umístěným na válci lisu, vyznačující se tím, že stavěči válec (3) je vyroben v krajní míře, z jedno-ho válcového prstenu (9), který pomocí jednoho středícího prstenu (11), který mé otvorypro odvod vzduchu (12), umístěného na koncích stavěcího válce (3) a vzdáleného od přírub(6, 7) pomocí šroubů (6), vytváří ve stěně válce jednu prstencovou mezeru (10) a válcovýkryt (14), umístěný mezi přírubami (6, 7) spolu s hrdly (16, 16) a vodící spirálou (15)koncentricky obepíná stavěči válce (3).
  2. 2. Plnicí zařízení podle bodu 1, vyznačující se tím, že prsten (9) mé asymetrickýpříčný řez a kuželové rozšíření prstencové mezery (10) na vnější stranu.
  3. 3. Plnicí zařízení podle bodů 1 a 2, vyznačující se tím, že mezi prstencem a stře-dícím prstenem (9, 11) je umístěna jedna distanční podložka (13), které může být měněna. Uznáno vynálezem na základě výsledků expertizy, provedené Úřadem pro vynálezectvía patentnictví, Berlín, DD. 1 výkres
CS825966A 1981-09-10 1982-08-12 Charging device for plastics treatment machines especially for extrusion presses CS245044B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD81233186A DD206646A3 (de) 1981-09-10 1981-09-10 Beschickungseinrichtung fuer plastverarbeitungsmaschinen, insbesondere extruder

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CS596682A1 CS596682A1 (en) 1985-06-13
CS245044B1 true CS245044B1 (en) 1986-08-14

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CS (1) CS245044B1 (cs)
DD (1) DD206646A3 (cs)
DE (1) DE3227983A1 (cs)
SU (1) SU1305049A1 (cs)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3248659A1 (de) * 1982-12-30 1984-07-05 Peroxid-Chemie GmbH, 8023 Höllriegelskreuth Entgasungseinrichtung an einem schnecken-extruder oder dergl.
DE4318137A1 (de) * 1993-06-01 1994-12-08 Herbert Stork Extruder für Materialien der Kunststoff-Aufbereitung
US5783225A (en) * 1993-12-21 1998-07-21 Bacher; Helmut Apparatus for processing thermoplastic synthetic plastics material
ES2102912T3 (es) * 1993-12-21 1997-08-01 Helmut Bacher Dispositivo de tratamiento de materias termoplasticas.
FR2720664B1 (fr) * 1994-06-01 1996-08-30 Sames Sa Dispositif de projection de produit de revêtement pulvérulent.
AT501154B8 (de) * 2005-01-28 2007-02-15 Erema Vorrichtung zur befüllung eines extruders mit vorbehandeltem thermoplastischen kunststoffmaterial
DE102014002209B4 (de) 2013-10-11 2016-11-24 Blach Verwaltungs Gmbh & Co. Kg Vorrichtung zur Seitenstrombeschickung eines Extruders
EP3053725A1 (de) * 2015-02-06 2016-08-10 LANXESS Deutschland GmbH Stopfschnecke
EP4070928A1 (en) * 2021-04-06 2022-10-12 I.C.M.A. San Giorgio Industria Costruzioni Macchine E Affini S.p.A. Apparatus for loading fragments of thermoplastic film in an extruder, particularly for recycling thermoplastic material, and operating method thereof

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Publication number Publication date
SU1305049A1 (ru) 1987-04-23
DD206646A3 (de) 1984-02-01
CS596682A1 (en) 1985-06-13
DE3227983A1 (de) 1983-03-17

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