US3031030A - Worm-device - Google Patents

Worm-device Download PDF

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Publication number
US3031030A
US3031030A US709698A US70969858A US3031030A US 3031030 A US3031030 A US 3031030A US 709698 A US709698 A US 709698A US 70969858 A US70969858 A US 70969858A US 3031030 A US3031030 A US 3031030A
Authority
US
United States
Prior art keywords
worm
roller
wedge
section
longitudinal
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 - Lifetime
Application number
US709698A
Other languages
English (en)
Inventor
Rodenacker Wolf
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Application granted granted Critical
Publication of US3031030A publication Critical patent/US3031030A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21C—MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH
    • A21C11/00—Other machines for forming the dough into its final shape before cooking or baking
    • A21C11/16—Extruding machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B01D1/222—In rotating vessels; vessels with movable parts
    • B01D1/228—In rotating vessels; vessels with movable parts horizontally placed cylindrical container or drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/10—Vacuum distillation
    • 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
    • B29C48/268—Throttling of the flow, e.g. for cooperating with plasticising elements or for degassing
    • 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
    • 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
    • B29C48/63—Screws having sections without mixing elements or threads, i.e. having cylinder shaped sections
    • 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
    • B29C48/68—Barrels or 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
    • B29C48/76—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
    • B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a 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
    • B29C48/03—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

Definitions

  • Worm machines are known in which two worms are arranged one after the other, one worm delivering into a vacuum container and, separately therefrom, a second worm conveying the material out of the vacuum container. These worm arrangements have separate drives. The delivery of the second worm is adjusted to that of the first worm by arranging for the medium being conveyed to contact a longer section of the second Worm, and thus to increase the pressure and the delivery of the second worm.
  • This method of quantity regulation leads to fluctuations in the quantity of material discharged by the machine, leading to dimensional differences in the material produced which are not allowable where standards are relatively high.
  • At least one section of the worm shaft used as a degasification zone, is constructed as a cylindrical roller which is surrounded by a housing comprising evacuatable chambers and which, together with the walls of longitudinal ducts in the housing which extend above and below the roller and communicate through apertures with the worm sections forms wedge-shaped gaps.
  • the cylindrical roller forming part of the worm shaft is conveniently arranged between two worm sections.
  • FIGURE 1 being a longitudinal sectional view
  • FIGURE 2 a cross-sectional view on the line 2-2 of FIGURE 1.
  • the liquid substance is introduced through the hole 1 into the worm section 3, in which it is conveyed, according to the direct-ion of rotation of the worm, through the aperture 4 into the degasification zone, which consists of the longitudinal ducts 6 and 7 formed by the housing 2 and the cylindrical roller 5, and of the evacuatable chambers 8 and 9.
  • the walls of the longitudinal ducts 6 and 7 form, together with the roller 5, the wedge-shaped gaps 10, 11, 12 and 13
  • the liquid conveyed into the longitudinal duct 6 by means of the worm section 3 enters through the wedge-shaped gap at the roller surface in a thin layer into the chamber 8, which is connected by means of the duct 17 to an evacuating device (not shown).
  • the liquid is degasified in the chamber 8 and passes through the wedgeshaped gap 11 under pressure into'the longitudinal duct '7, which is constructed in the same way as the longitudinal duct 6.
  • the longitudinal duct 7 is connected through an aperture 14 to the threads of the worm section 15, so that the liquid mass is fed under pressure into the worm section '15.
  • the worm l5 conveys the material through the hole 16 out of the device.
  • a proportion of the liquid mass is carried from the longitudinal duct 7 through the wedge-shaped gap 12 in a thin layer into the chamber 9 which is also connected by means of a duct 18 .to evacuating means (not shown), and then is fed again under pressure through the wedge-shaped gap 13 into the longitudinal duct 6.
  • the worm shaft which consists of the sections 3, 5 and 15, is driven through the agency of the square head connection 21 by the shaft 19, which is sealed by the stuffing box 2t).
  • the worm shaft sub-divided into three parts, is mounted in freely movable fashion in order that the clearance in the wedge-shaped gaps it), 11, i2 and 13 in the evacuation zone can adjust itself automatically and the liquid mass which is transported in a thin layer on the roller 5 through the vacuum chambers 8 and 9 is not scraped into these chambers.
  • the evaporation zone may also serve, for example, for evaporating a plasticiser as far as a given concentration or for introducing plasticisers, dyestuffs or fillers or the like.
  • a worm device for liquid and plastic material comprising a casing having an inlet and an outlet axially spaced therefrom, a worm shaft rotatably mounted in said casing for conveying material axially through the casing from said inlet to said outlet, 2 section of said worm shaft being formed as a cylindrical roller, a portion of said casing laterally adjacent said roller being formed as an evacuatable chamber, means for evacuating said chamber, another portion of said casing circumferentially adjacent said previously mentioned portion defining with said roller a wedge-shaped gap circumferentially leading into said evacuatable chamber, a passage for material communicating said worm shaft and said wedge-shaped gaps, said worm shaft being laterally movable with respect to the casing wall whereby the clearance in the wedge-shaped gap can adjust itself automatically.
  • a worm device in which said roller is formed on an intermediate section of said worm shaft.
  • a worm device in which the portion of said casing surrounding said roller defines two opposed evacuatable chambers with two opposed longitudinal ducts circumferentially positioned therebetween, wedge-shaped gaps communicating said chambers and ducts in the direction of rotation of said rollers and passages axially communicating a portion of said worm shaft adjacent said roller with said ducts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Gas Separation By Absorption (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US709698A 1957-01-22 1958-01-17 Worm-device Expired - Lifetime US3031030A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0022187 1957-01-22

Publications (1)

Publication Number Publication Date
US3031030A true US3031030A (en) 1962-04-24

Family

ID=7090350

Family Applications (1)

Application Number Title Priority Date Filing Date
US709698A Expired - Lifetime US3031030A (en) 1957-01-22 1958-01-17 Worm-device

Country Status (6)

Country Link
US (1) US3031030A (da)
BE (1) BE564132A (da)
DE (1) DE1067002B (da)
FR (1) FR1190303A (da)
GB (1) GB826096A (da)
NL (2) NL224151A (da)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159873A (en) * 1962-06-18 1964-12-08 Monsanto Co Continuous annealer
US3170190A (en) * 1963-08-06 1965-02-23 Du Pont Extrusion apparatus
US3217783A (en) * 1961-12-22 1965-11-16 Bayer Ag Apparatus for removing volatile constituents contained in liquid synthetic plastic melts
US3233656A (en) * 1962-04-18 1966-02-08 Bayer Ag Falling film evaporator of the rotating drum type
US3601370A (en) * 1967-11-20 1971-08-24 Buss Ag Continuously operating mixing and kneading machine
US4007545A (en) * 1972-01-14 1977-02-15 International Basic Economy Corporation Method for adjusting temperature and pressure of a fluid
WO1984004274A1 (en) * 1983-04-29 1984-11-08 Usm Corp Devolatilizing mixing extruder
US4654150A (en) * 1985-08-12 1987-03-31 Associated Oiltools, Inc. Apparatus and method for removing combustibles from drill cuttings
US4711647A (en) * 1985-05-02 1987-12-08 Barmag Aktiengesellschaft Process and apparatus for degassing liquids, especially polymer melts and solutions
US20070202228A1 (en) * 2003-06-27 2007-08-30 Helou Jr Elie Extrusion mold and method of use
US20080217817A1 (en) * 2007-03-10 2008-09-11 Cool Options, Inc. Screw design and method for metal injection molding
US20120291631A1 (en) * 2010-02-05 2012-11-22 Kazuo Noda Degassing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257173A (en) * 1960-08-23 1966-06-21 Du Pont Polymer finishing apparatus
DE2612827C3 (de) * 1976-03-26 1982-11-18 Werner & Pfleiderer, 7000 Stuttgart Schneckenstrangpresse zur kontinuierlichen Aufbereitung und Entgasung von Elastomeren und Polymeren mit einer Viskosität über 1000 d Pa s

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1283947A (en) * 1915-04-24 1918-11-05 Rubber Regenerating Co Treatment of materials.
US2595455A (en) * 1950-03-07 1952-05-06 Nat Rubber Machinery Co Extruder
US2719325A (en) * 1951-12-13 1955-10-04 Hercules Powder Co Ltd Method and apparatus for mixing plastic compositions
US2797767A (en) * 1956-07-31 1957-07-02 Brooke Lewis Method and apparatus for treating lubricants
US2906367A (en) * 1956-11-08 1959-09-29 American Viscose Corp De-gasifying liquids

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1283947A (en) * 1915-04-24 1918-11-05 Rubber Regenerating Co Treatment of materials.
US2595455A (en) * 1950-03-07 1952-05-06 Nat Rubber Machinery Co Extruder
US2719325A (en) * 1951-12-13 1955-10-04 Hercules Powder Co Ltd Method and apparatus for mixing plastic compositions
US2797767A (en) * 1956-07-31 1957-07-02 Brooke Lewis Method and apparatus for treating lubricants
US2906367A (en) * 1956-11-08 1959-09-29 American Viscose Corp De-gasifying liquids

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217783A (en) * 1961-12-22 1965-11-16 Bayer Ag Apparatus for removing volatile constituents contained in liquid synthetic plastic melts
US3233656A (en) * 1962-04-18 1966-02-08 Bayer Ag Falling film evaporator of the rotating drum type
US3159873A (en) * 1962-06-18 1964-12-08 Monsanto Co Continuous annealer
US3170190A (en) * 1963-08-06 1965-02-23 Du Pont Extrusion apparatus
US3601370A (en) * 1967-11-20 1971-08-24 Buss Ag Continuously operating mixing and kneading machine
US4007545A (en) * 1972-01-14 1977-02-15 International Basic Economy Corporation Method for adjusting temperature and pressure of a fluid
WO1984004274A1 (en) * 1983-04-29 1984-11-08 Usm Corp Devolatilizing mixing extruder
US4491417A (en) * 1983-04-29 1985-01-01 Usm Corporation Devolatilizing mixing extruder
US4711647A (en) * 1985-05-02 1987-12-08 Barmag Aktiengesellschaft Process and apparatus for degassing liquids, especially polymer melts and solutions
US4654150A (en) * 1985-08-12 1987-03-31 Associated Oiltools, Inc. Apparatus and method for removing combustibles from drill cuttings
US20070202228A1 (en) * 2003-06-27 2007-08-30 Helou Jr Elie Extrusion mold and method of use
US8087921B2 (en) * 2003-06-27 2012-01-03 Biosphere Holdings Corporation Extrusion mold and method of use
US20080217817A1 (en) * 2007-03-10 2008-09-11 Cool Options, Inc. Screw design and method for metal injection molding
US9283617B2 (en) * 2007-03-10 2016-03-15 Cool Options, Inc. Screw design and method for metal injection molding
US20120291631A1 (en) * 2010-02-05 2012-11-22 Kazuo Noda Degassing apparatus
US8906147B2 (en) * 2010-02-05 2014-12-09 Sumitomo Bakelite Company Limited Degassing apparatus

Also Published As

Publication number Publication date
NL100736C (da) 1900-01-01
FR1190303A (fr) 1959-10-12
GB826096A (en) 1959-12-23
NL224151A (da) 1900-01-01
BE564132A (da) 1900-01-01
DE1067002B (de) 1959-10-15

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