GB965183A - Method for removing moisture from non-rigid elastomers - Google Patents

Method for removing moisture from non-rigid elastomers

Info

Publication number
GB965183A
GB965183A GB2972/62A GB297262A GB965183A GB 965183 A GB965183 A GB 965183A GB 2972/62 A GB2972/62 A GB 2972/62A GB 297262 A GB297262 A GB 297262A GB 965183 A GB965183 A GB 965183A
Authority
GB
United Kingdom
Prior art keywords
shaft
passes
pressure
temperature
drying
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
Application number
GB2972/62A
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.)
International Basic Economy Corp
Original Assignee
International Basic Economy Corp
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 International Basic Economy Corp filed Critical International Basic Economy Corp
Publication of GB965183A publication Critical patent/GB965183A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B29B13/065—Conditioning or physical treatment of the material to be shaped by drying of powder or pellets
    • 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
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
    • B29C48/687—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having projections with a short length in the barrel direction, e.g. pins
    • 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
    • B29C48/761—Venting, drying means; Degassing means the vented material being in liquid form
    • 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
    • B29C48/762—Vapour stripping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Drying Of Solid Materials (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

965,183. Drying non-rigid elastomers. INTERNATIONAL BASIC ECONOMY CORPORATION. Jan. 26, 1962 [Feb. 17, 1961], No. 2972/62. Heading F4G. [Also in Division B1] In apparatus for drying non-rigid elastomeric material, the material passes through an elongated enclosure with gradually increasing pressure and temperature until a sudden escape of the material from the zone of highest pressure in the enclosure to one of reduced temperature and pressure outside induces instantaneous flash evaporation of moisture in the material and cooling thereof. In a process for preliminary dewatering and drying natural, synthetic and reclaimed rubbers, the material in slurry form passes from a belt 20, Fig. 1, through a preliminary extrusion drier 22 to reduce the water content to between 5 and 20% by weight, and then passes to a drying unit 23, Fig. 6A, in which the material is increasingly compressed by a shaft with compression worms 69, 70, 71 &c. and inwardly extending breaker bolts 77 and heated by a steam heated jacket (not shown). The material is thus compressed and heated until it passes through discharge openings 80 in a removable insert 82, in a dieplate 79, the sudden drop in pressure and temperature inducing flash evaporation of water from the material and also a cooling of the material. A thermocouple (not shown) is inserted in the die plate 79 to sense the temperature of the elastomer and is utilized to control steam admission to the jacket in accordance with the requirements and cutter means (not shown) adjacent the exit reduce the issuing material to limited size. Steam or other vapour or gas under pressure may be introduced into the imperforate barrel of the unit 23 through a valve 90, to increase the total heat input into the material or increase the porosity of the elastomer. The extrusion press drier 22 comprises barrel bars 30, Fig. 3, held by split-ring retainers 31 and clamped by bolts 32 leaving slight spaces therebetween for the escape of liquid forced out by the action of screw flights on a shaft 35 and knife bar tips 34a projecting therebetween. The discharge end has an adjustable cone choke which can be advanced or retracted along the shaft to adjust the escape area between the cone and barrel which respectively carry movable and fixed cutter elements to co-operate in intermittent cutting engagement during rotation of the shaft.
GB2972/62A 1961-02-17 1962-01-26 Method for removing moisture from non-rigid elastomers Expired GB965183A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8997361A 1961-02-17 1961-02-17

Publications (1)

Publication Number Publication Date
GB965183A true GB965183A (en) 1964-07-29

Family

ID=22220470

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2972/62A Expired GB965183A (en) 1961-02-17 1962-01-26 Method for removing moisture from non-rigid elastomers

Country Status (2)

Country Link
DE (1) DE1454801B2 (en)
GB (1) GB965183A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799235A (en) * 1970-11-27 1974-03-26 Firestone Tire & Rubber Co Method and apparatus for desolventizing elastomers
GB1590532A (en) * 1976-08-04 1981-06-03 Exxon Research Engineering Co Elastomer extrusion drying with gas injection
DE3541499C1 (en) * 1985-11-23 1993-06-03 Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover Pin cylinder extruder with a cylinder tempering device
DE4010540C1 (en) * 1990-04-02 1991-11-07 Wilfried Dipl.-Ing. 3017 Pattensen De Baumgarten
DE4244312C1 (en) * 1992-12-28 1994-01-20 Baumgarten Wilfried Screw extruder

Also Published As

Publication number Publication date
DE1454801A1 (en) 1969-03-27
DE1454801B2 (en) 1972-09-07

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