GB2327374A - Melting thermoplastic material for application to surfaces - Google Patents

Melting thermoplastic material for application to surfaces Download PDF

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Publication number
GB2327374A
GB2327374A GB9714931A GB9714931A GB2327374A GB 2327374 A GB2327374 A GB 2327374A GB 9714931 A GB9714931 A GB 9714931A GB 9714931 A GB9714931 A GB 9714931A GB 2327374 A GB2327374 A GB 2327374A
Authority
GB
United Kingdom
Prior art keywords
melting thermoplastic
application
heated
chamber
thermoplastic material
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.)
Withdrawn
Application number
GB9714931A
Other versions
GB9714931D0 (en
Inventor
Noel James Bourke
John Kelly
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9714931A priority Critical patent/GB2327374A/en
Publication of GB9714931D0 publication Critical patent/GB9714931D0/en
Publication of GB2327374A publication Critical patent/GB2327374A/en
Withdrawn legal-status Critical Current

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
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
    • 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
    • B29C48/04—Particle-shaped

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Equipment for rapidly melting thermoplastic materials in powder or granular form without degradation, for use in white-lining and surfacing, comprises a heated rotating cylinder inside a heated outer chamber. The cylinder is fitted with vanes to move the product along the chamber to create turbulence and better thermal mixing. Heating is by indirect hot oil transfer.

Description

1. TECHNICAL FIELD.
THE INVENTION RELATES TO EQUIPMENT USED TO MELT OUT THERMOPLASTIC MATERIALS SUPPLIED IN POWDER OR GRANULAR FORM.
2.BACKGROUND THERMOPLASTIC PRE-HEATERS ARE WELL KNOWN PIECES OF EQUIPMENT AND ARE USED EXTENSIVELY IN THE WHITE LINING CONTRACTING AND SPECIALIST SURFACING CONTRACTING. THESE PIECES OF EQUIPMENT ARE EITHER VERTICAL OR HORIZONTAL MIXERS, DIRECT GAS HEATED OR INDIRECTLY HEATED BY OIL TRANSFER.
BOTH HAVE THEIR INHERENT DRAWBACKS. THE INDIRECT OIL TRANSFER HEATING HAS A LONG MELT OUT TIME COMPARED WITH THE DIRECT GAS HEATER. THE DIRECT GAS HEATER HAS VERY HIGH CONTACT TEMPERATURES WHICH INEVITABLY LEADS TO THERMAL DEGRADATION OF THE PRODUCT BEING MELTED WHEN THE PRODUCT HAS REACHED THE DESIRED TEMPERATURE RELATIVELY LARGE VOLUMES ARE PRODUCED AND THEN HAVE TO BE MAINTAINED AT THE REQUIRED TEMPERATURE.
3 INVENTION.
ACCORDING TO OUR INVENTION BOTH OF THE DEFECTS OF THE CURRENTLY USED EQUIPMENT ARE OVERCOME WE CLAIM RAPID MELT OUT TIME AND THE ELIMINATION OF PRODUCT DEGRADATION THE MOLTEN PRODUCT IS OFTEN REQUIRED CONTINUOUSLY AT A MODERATE RATE AND OUR INVENTION IS DESIGNED TO DO JUST THAT THIS IS ACHIEVED BY USING A SMALL VOLUME INTENSIVE AGITATION MIXING CHAMBER WITH A VERY HIGH RATIO OF HEATING SURFACE TO VOLUME.
THE HEATING IS SUPPLIED BY INDIRECT HOT OIL TRANSFER.
EXAMPLE.
THE MIXING CHAMBER CAN CONSIST OF EITHER ONE OR TWO CYLINDERS, BUT TWO THE PREFERRED DESIGN AS A MORE INTENSIVE MIXING ACTION OCCURS.

Claims (1)

  1. CLAIM.
    A THERMOPLASTIC PRE-HEATER CONSISTING OF A HEATED ROTATING CYLINDER INSIDE A HEATED OUTER CHAMBER. THE INNER CYLINDER TO BE FITTED WITH VANES TO MOVE THE PRODUCT ALONG THE CHAMBER AND TO CREATE TURBULENCE AND BETTER THERMAL MIXING.
GB9714931A 1997-07-17 1997-07-17 Melting thermoplastic material for application to surfaces Withdrawn GB2327374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9714931A GB2327374A (en) 1997-07-17 1997-07-17 Melting thermoplastic material for application to surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9714931A GB2327374A (en) 1997-07-17 1997-07-17 Melting thermoplastic material for application to surfaces

Publications (2)

Publication Number Publication Date
GB9714931D0 GB9714931D0 (en) 1997-09-17
GB2327374A true GB2327374A (en) 1999-01-27

Family

ID=10815914

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9714931A Withdrawn GB2327374A (en) 1997-07-17 1997-07-17 Melting thermoplastic material for application to surfaces

Country Status (1)

Country Link
GB (1) GB2327374A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707756A (en) * 1950-07-24 1954-04-21 Eskil Anders August Axelson An improved spraying installation
GB843514A (en) * 1956-11-21 1960-08-04 Ignazio Pastorello Mixing and thickening machine for extruding and granulating material
GB1459997A (en) * 1972-11-24 1976-12-31 Prismo Universal Ltd Harding J Method and apparatus for feeding liquid material to be sprayed
GB2059815A (en) * 1979-10-11 1981-04-29 Wood T J Mastic dispenser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707756A (en) * 1950-07-24 1954-04-21 Eskil Anders August Axelson An improved spraying installation
GB843514A (en) * 1956-11-21 1960-08-04 Ignazio Pastorello Mixing and thickening machine for extruding and granulating material
GB1459997A (en) * 1972-11-24 1976-12-31 Prismo Universal Ltd Harding J Method and apparatus for feeding liquid material to be sprayed
GB2059815A (en) * 1979-10-11 1981-04-29 Wood T J Mastic dispenser

Also Published As

Publication number Publication date
GB9714931D0 (en) 1997-09-17

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)