WO1982000193A1 - Assemblage de modules de chauffage pour un appareil de fusion et de distribution d'un materiau thermoplastique - Google Patents

Assemblage de modules de chauffage pour un appareil de fusion et de distribution d'un materiau thermoplastique Download PDF

Info

Publication number
WO1982000193A1
WO1982000193A1 PCT/US1980/000825 US8000825W WO8200193A1 WO 1982000193 A1 WO1982000193 A1 WO 1982000193A1 US 8000825 W US8000825 W US 8000825W WO 8200193 A1 WO8200193 A1 WO 8200193A1
Authority
WO
WIPO (PCT)
Prior art keywords
fins
thermoplastic material
melting
heater
recess
Prior art date
Application number
PCT/US1980/000825
Other languages
English (en)
Inventor
Corp Mercer
D Mercer
Original Assignee
Corp Mercer
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 Corp Mercer filed Critical Corp Mercer
Priority to AU69275/81A priority Critical patent/AU6927581A/en
Priority to PCT/US1980/000825 priority patent/WO1982000193A1/fr
Priority to EP19810900697 priority patent/EP0054548A4/fr
Priority to JP50096580A priority patent/JPS57500914A/ja
Publication of WO1982000193A1 publication Critical patent/WO1982000193A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • 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
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/022—Melting the material to be shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/0806—Charging or discharging devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B2014/0887—Movement of the melt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0006—Electric heating elements or system
    • F27D2099/0008—Resistor heating

Definitions

  • This invention relates to apparatus for the melting and dispensing of thermoplastic material, and more particularly to a heater module structure for such apparatus.
  • each first fin of the second module spans the corresponding space between each adjacent pair of second fins of the first module to close all vertical spaces between the adjacent first and second fins and to provide longitudinally staggered vertical holes for the fluid passage of the melted thermplastic material.
  • an entire grid surface may be built up to form a complete heating stage for rapidly melting the thermoplastic material.
  • an assembly of the above heater modules may be utilized in each stage of the melting apparatus by mounting each, assembled stage within a hopper-type housing having a cross-section of the same shape as, but siightly larger than, the cross-section of the assembled stages.
  • Conventional thermoplastic dispensing elements such as a dispensing head and hose, may be incorporated below the various stages assembled fuom the heater modules, for dispensing the melted thermoplastic material.
  • various sizes of heating or grid stages may be constructed, with one or more vertically arranged stages, with a minimum of assembly time and materials.
  • FIG. 2 is a section taken along the line 2-2 of FIG. 1;
  • FIG. 3 is a section taken along the line 3-3 of FIG. 1;
  • FIG. 4 is an enlarged fragmentary section taken along the line 4-4 of FIG. 3;
  • FIG. 5 is a fragmentary section taken along the line 5-5 of FIG. 4;
  • FIG. 6 is a fragmentary top perspective view of a plurality of heater modules assembled in a pre-melting stage. Best Mode For Carrying Out The Invention
  • a hopper 15 for receiving the thermoplastic material 16 in its solid form.
  • a protective casing or jacket 18 may enclose, and be spaced from, the outer surface of the heating receptacle. As shown, the hopper 15 is integral with the jacket 18.
  • a gear pump 20 is driven by motor 21 through sprocket-chain transmission 22 and the driven shaft 23 to move the molten thermoplastic material 24 through the conduit block 12 into the heated dispensing head 25.
  • Hose 26 conveys the hot thermoplastic material 24 from the dispensing head 25, preferably through a nozzle 27, to a point of discharge.
  • the controls for the apparatus 10 are mounted in the control housing 29 on the outside of the jacket 18.
  • a plurality of heater modules 30, made in accordance with this invention, are assembled within the heating receptacle 14 to provide an upper, or pre-melt, stage 31 and a lower, melting, or progressive melting stage 32.
  • Each module 30 includes an elongated body 34 of thermally conductive material.
  • Each elongated body 34 includes an elongated substantially rectangular core 35 of substantial height or depth having a plurality of first and second fins 36 and 37 projecting from opposite sides of the core 35.
  • Each of the first and second fins 36 and 37 is a substantially uniform, rectangular cross-section.
  • the first fins 36 and the second fins 37 are uniformly longitudinally spaced apart to form recesses 38 and 39, respectively, of uniform longitudinal dimensions equal to the longitudinal dimension of each of the fins 36 and 37.
  • the second fins 37 are longitudinally staggered relative to the first fins 36 so that a fin 37 is in lateral alignment with a first recess 38, while each first fin 36 is in lateral alignment with a corresponding second recess
  • a heating stage is built up by assembly of a plurality of modules 30 longitudinally parallel and adjacent to each other, with the first fins 36 of the second module 30' (FIG. 6) opposite and aligned with a second recess 39 in the first module 30, such that the lateral outer vertical face of the fin 36 closes the recess 39.
  • the outer vertical face of each fin 37 closes an opposing recess 38.
  • the closed recesses 38 and 39 form longitudinally staggered vertical holes, each hole having a rectangular cross-section, completely enclosed laterally and longitudinally, but vertically open to pro vide a fluid passage for the molten thermoplastic material 24.
  • Each group of parallel modules 30. in each stage 31 and 32 may be held in assembled position by the ganging bars 50 at each end of the module 30.
  • the ganging bars 50 may be connected together by the vertical connecting bars 41 and suspended from the upper edge of the hopper 15 by the hanger bars 52.
  • the method of supporting the assembled modules 30 by the hanger bars 52 prevents any fastener members from penetrating the walls of the heater receptacle 14, to eliminate leakage of the very hot molten thermoplastic material 24.
  • the thermal sensing elements 43 for each heating stage 31 and 32 are connected to separate and independent the ⁇ nostatic controls, so that the pre-melt stage 31 may be heated to and maintained at a lower temperature than the progressive melt or melting stage 32, as described in the prior U.S. Mercer patent 3,531,023.
  • thermoplastic melting devices and apparatus may be easily and very quickly and economically assembled, regardless of the number of vertical stages required, and regardless of the transverse size and capacity of the apparatus desired.
  • top walls 56 and 57 of the respective fins 36 and 37 are sloped, so that they decline laterally from the core 34 to facilitate drainage of the molten thermoplastic material 24 downward into, the corresponding vertical holes 38 and 39, to prevent unwanted accumulation of the thermoplastic material on top of the modules 30 and 30'. It is also within the scope of this invention to provide horizontal holes in the core 34 to receive heating elements, such as heating elements 40, longitudinally horizontally within the core 34.
  • the monolithic thermally conductive material incorporated in each of the modules may be of an aluminum alloy, such as aluminum alloy No. 202413 or aluminum alloy 6061T6.
  • a pre-melt stage 31 or progressive melting stage 32 has been designed which affords a greater ratio of heating surface to the opening areas for the thermoplastic material, thereby reducing the melting time and increasing the flew velocity of the thermoplastic material 24 through the respective melting stages 31 and 32, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Coating Apparatus (AREA)

Abstract

Les appareils de fusion de distribution d'un materiau thermoplastique de l'art anterieur ont de faibles vitesses de fusion et d'ecoulement du materiau thermoplastique. Un module de chauffage est adapte pour etre utilise dans un appareil de fusion et de distribution d'un materiau thermoplastique (24) avec d'autres modules similaires de formation d'un prefondant et/ou un etage de fusion (31, 32) de chauffage du materiau thermoplastique (24). Chaque module a une construction uniforme et comprend un noyau allonge (35) ayant une pluralite de premieres ailettes espacees longitudinalement (36) se projetant depuis un cote du noyau (35) et des secondes ailettes (37) se projetant depuis l'autre cote du noyau (35), mais placees en quinconce de maniere uniforme et longitudinalement par rapport aux premieres ailettes (36), de telle sorte qu'en placant une pluralite de modules paralleles adjacents entre eux les evidements (38, 39) definis entre les ailettes adjacentes (36, 37) sont fermes par les ailettes opposees (37, 36) pour former des trous verticaux longitudinaux en quinconce pour le passage de l'ecoulement du materiau thermoplastique fondu (24). Les trous verticaux en quinconce dans les modules de chauffage ont un rapport surfaces de chauffage/section d'ouverture augmente ce qui a pour consequence de reduire le temps de fusion et augmenter la vitesse d'ecoulement du materiau thermoplastique.
PCT/US1980/000825 1980-06-30 1980-06-30 Assemblage de modules de chauffage pour un appareil de fusion et de distribution d'un materiau thermoplastique WO1982000193A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU69275/81A AU6927581A (en) 1980-06-30 1980-06-30 Heater module for thermoplastic material melting apparatus
PCT/US1980/000825 WO1982000193A1 (fr) 1980-06-30 1980-06-30 Assemblage de modules de chauffage pour un appareil de fusion et de distribution d'un materiau thermoplastique
EP19810900697 EP0054548A4 (fr) 1980-06-30 1980-06-30 Assemblage de modules de chauffage pour un appareil de fusion et de distribution d'un materiau thermoplastique.
JP50096580A JPS57500914A (fr) 1980-06-30 1980-06-30

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1980/000825 WO1982000193A1 (fr) 1980-06-30 1980-06-30 Assemblage de modules de chauffage pour un appareil de fusion et de distribution d'un materiau thermoplastique
WOUS80/00825800630 1980-06-30

Publications (1)

Publication Number Publication Date
WO1982000193A1 true WO1982000193A1 (fr) 1982-01-21

Family

ID=22154417

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1980/000825 WO1982000193A1 (fr) 1980-06-30 1980-06-30 Assemblage de modules de chauffage pour un appareil de fusion et de distribution d'un materiau thermoplastique

Country Status (4)

Country Link
EP (1) EP0054548A4 (fr)
JP (1) JPS57500914A (fr)
AU (1) AU6927581A (fr)
WO (1) WO1982000193A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917403A (en) * 1988-04-25 1990-04-17 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing support apparatus
EP0771631A2 (fr) * 1995-10-30 1997-05-07 Nordson Corporation Dispositif pour la distribution de matériaux thermoplastiques fondus pourvu de bloc de distribution, filtre et valve de purge automatique
US20210123678A1 (en) * 2019-10-24 2021-04-29 Waterblasting, Llc Melting kettle

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809772A (en) * 1955-05-02 1957-10-15 Kamborian Jacob S Apparatus for melting and dispensing thermoplastic adhesive
US3217793A (en) * 1962-11-30 1965-11-16 Wakefield Eng Inc Heat transfer
US3352279A (en) * 1965-09-15 1967-11-14 Lockwood Tech Adhesive applicator
US3377466A (en) * 1965-04-05 1968-04-09 United Shoe Machinery Corp Apparatus for handling thermoplastic material
US3396458A (en) * 1966-03-28 1968-08-13 Electro Therm Electrical heating elements and method and apparatus for making the same
US3531023A (en) * 1968-04-30 1970-09-29 Mercer Corp Process and apparatus for melting and dispensing thermoplastic material
US3632987A (en) * 1970-02-20 1972-01-04 Harley J Orr Heating and radiating unit for electrical heaters
US3792801A (en) * 1971-10-29 1974-02-19 Nordson Corp Thermoplastic applicator with self-cleaning supply reservoir
US3964645A (en) * 1975-02-12 1976-06-22 Nordson Corporation Apparatus for melting and dispensing thermoplastic material
US4009974A (en) * 1975-02-12 1977-03-01 Nordson Corporation Method and apparatus for pumping viscous material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916262A (en) * 1959-12-08 flores
US1662870A (en) * 1924-10-09 1928-03-20 Stancliffe Engineering Corp Grooved-plate heat interchanger

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809772A (en) * 1955-05-02 1957-10-15 Kamborian Jacob S Apparatus for melting and dispensing thermoplastic adhesive
US3217793A (en) * 1962-11-30 1965-11-16 Wakefield Eng Inc Heat transfer
US3377466A (en) * 1965-04-05 1968-04-09 United Shoe Machinery Corp Apparatus for handling thermoplastic material
US3352279A (en) * 1965-09-15 1967-11-14 Lockwood Tech Adhesive applicator
US3396458A (en) * 1966-03-28 1968-08-13 Electro Therm Electrical heating elements and method and apparatus for making the same
US3531023A (en) * 1968-04-30 1970-09-29 Mercer Corp Process and apparatus for melting and dispensing thermoplastic material
US3632987A (en) * 1970-02-20 1972-01-04 Harley J Orr Heating and radiating unit for electrical heaters
US3792801A (en) * 1971-10-29 1974-02-19 Nordson Corp Thermoplastic applicator with self-cleaning supply reservoir
US3964645A (en) * 1975-02-12 1976-06-22 Nordson Corporation Apparatus for melting and dispensing thermoplastic material
US4009974A (en) * 1975-02-12 1977-03-01 Nordson Corporation Method and apparatus for pumping viscous material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0054548A4 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4917403A (en) * 1988-04-25 1990-04-17 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing support apparatus
EP0771631A2 (fr) * 1995-10-30 1997-05-07 Nordson Corporation Dispositif pour la distribution de matériaux thermoplastiques fondus pourvu de bloc de distribution, filtre et valve de purge automatique
EP0771631A3 (fr) * 1995-10-30 1998-01-28 Nordson Corporation Dispositif pour la distribution de matériaux thermoplastiques fondus pourvu de bloc de distribution, filtre et valve de purge automatique
US20210123678A1 (en) * 2019-10-24 2021-04-29 Waterblasting, Llc Melting kettle
US20210123677A1 (en) * 2019-10-24 2021-04-29 Waterblasting, Llc Thermoplastic extrusion melting kettle
US11604028B2 (en) * 2019-10-24 2023-03-14 Waterblasting, Llc Thermoplastic extrusion melting kettle
US11619449B2 (en) * 2019-10-24 2023-04-04 Waterblasting, Llc Melting kettle

Also Published As

Publication number Publication date
EP0054548A4 (fr) 1985-04-11
AU6927581A (en) 1982-02-02
JPS57500914A (fr) 1982-05-27
EP0054548A1 (fr) 1982-06-30

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