US2371916A - Melting apparatus - Google Patents

Melting apparatus Download PDF

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Publication number
US2371916A
US2371916A US391751A US39175141A US2371916A US 2371916 A US2371916 A US 2371916A US 391751 A US391751 A US 391751A US 39175141 A US39175141 A US 39175141A US 2371916 A US2371916 A US 2371916A
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US
United States
Prior art keywords
melting
composition
pump
feeding
conduit
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
US391751A
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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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2371916A publication Critical patent/US2371916A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/022—Melting the material to be shaped
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/04—Melting filament-forming substances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/86131—Plural
    • Y10T137/86139—Serial

Definitions

  • My present invention relates to improvements in method and apparatus for melting the bits of organic compositions thermoplastic and fusible at a high temperature. More particularly, it re lates to an improved method for producing foils, films, and the like from fusible high molecular weight linear polymers.
  • the composition is continuously forced, for instance, by a weight laid on it, against a, drum 2 toothed like a milling cutter.
  • Said drum is kept at the melting temperature by an electric heating element 3 obtainingthe current by means of sliprings t.
  • the exact adjustment of the temperature is, for instance, eiiected by heat transfer to a pump body which is maimtained at a constant temperature by a control mechanism.
  • the rotatable drum 2 is driven by a shaft 5 and thus removes the just melted end of the rod whereupon the rod is forced against another hot surface.
  • the drum can be toothed in such a manner that when the solid rod contacts it, the pro-heated composition is simulta neously cut into chips.
  • the molten mass is transferred with a part 5 of the drum 2 to a pump l shownas a gear pump, part 6 being a worm.
  • the thread of the worm is so constructed that a pressure which efiects a complete filling of the toothed wheels is produced for the pump.
  • the objects of the invention are accomplished by using a moving heating body adapted to melt thebits of an organic material and connected with a device for feeding the material to be melted and, if required, a mechanism for feeding the molten composition.
  • FIG. l is a front sectional elevation of the melting device constructed in accordance with and embodying the preferred form of my invention
  • Figure 2 is a side sectional elevation of the device shown in Figure 1,
  • Figure 3 is a front .elevational view partly in section of a melting device suitable for the production of films
  • Figure 4 is a side sectional elevation of the device shown in Figure 3.
  • numeral l designates a conduit through which the organic compitch is, for example, made progressive for this purpose. To this pressure a further pressuresnay be added. An inert gas, which is necessary to exclude the air from the melting chamber is pressed into the storing vessel. It is, however, also possible to employ a melting device with open filling funnel if, for example, carbon dioxide is used for driving-out the air, the pump 7 serves automatically to control the feed of the molten mass to the spinneret l, for if a. greater portion of the composition is melted than that removed by thepump, the level of the melt rises and the heat transfer is solely efiected by conduction of heat from the walls of the conduit l. The rising of the'level of melt therefore effects a lowering of the output. The pump accordingly regulates the charge as well as the discharge automatically.
  • the method of the invention can also be carried out in a form other than that shown in Figures 1 and 2.
  • a melting device as described above may be used in spinning processes for producing filaments or ribbons, in casting to form films and thick plates and in injection molding.
  • the melting device is constructed dependent upon the amount and form of the composition and the size of the single apparatus which must correspond to the machines for further treating the molten product.
  • the material to be worked up may be employed in any form, for instance, as endless rods or ribbons, strips, cubes, or in granulated or powdered form.
  • racks are positioned which are provided with saw teeth and adapted to move back and forth. Racks are especially suitable-for'feeding products in pieces.
  • the feeding means may also comprise lateral belt conveyers.
  • worms are preferably suitable.
  • the melting drums must depend in number and size upon the desired power. It is also evident that the grooving of the elements and the condition of their surfaces must correspond to the form of the materials to be treated.
  • FIGs 3 and 4 a device is shown which is suitable for producing articles having large areas as, for instance, films.
  • the material which is introduced into the vessel 8 falls on the melting drums Lworking in both directions.
  • the drums are connectedwith the feeding worms in constructed as helical pumps engaging into one another.
  • the worm or helical. pump produces a pressure by which the toothed wheels I I mounted together with the worms and milling cutters on the same shaft are filled.
  • the gear pump feeds the melt into a distributing conduit I! from which it is forced into a casting tube IS.
  • a corresponding melting device can be constructed for a spinning apparatus having a great number of spinnerets.
  • the advantage of the device according to the invention resides in the fact that the part which is to be maintained at a high temperature is especiaily small whereby the amount of heat necessary for melting the composition can be considerably decreased. This is in particular of importance when temperatures of above 200 0. must be kept which areobtained in most cases by electrical heating.
  • a further great advantage is the regulated melting procedure in which the controlling member simultaneously effects the conveyance of the material.
  • the melting device of this invention is especially suitable ior producing foils, films, and the like from fusible linear high molecular weight polymers such as polyamides and polyurethanes.
  • a vertical conduit for receiving and feeding said composition, a pair of interengaging longitudinally-ribbed melting drums transverse- 1y disposed in the path of said conduit and working in opposite directions, said drums having at one end registering helical feeding worms. and a gear pump to receive and feed the melt downwardly from the helical pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US391751A 1940-01-16 1941-05-03 Melting apparatus Expired - Lifetime US2371916A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2371916X 1940-01-16

Publications (1)

Publication Number Publication Date
US2371916A true US2371916A (en) 1945-03-20

Family

ID=7995580

Family Applications (1)

Application Number Title Priority Date Filing Date
US391751A Expired - Lifetime US2371916A (en) 1940-01-16 1941-05-03 Melting apparatus

Country Status (3)

Country Link
US (1) US2371916A (enrdf_load_html_response)
FR (1) FR880166A (enrdf_load_html_response)
NL (1) NL56648C (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515201A (en) * 1948-05-27 1950-07-18 Dow Chemical Co Gear pump for metering and extruding hot organic thermoplastics
US3492791A (en) * 1966-11-30 1970-02-03 Ici Ltd Polymerisation apparatus and process
FR2406101A1 (fr) * 1977-04-12 1979-05-11 Union Carbide Corp Pompe a engrenage pour liquides visqueux
US4299559A (en) * 1979-06-01 1981-11-10 Fuji Photo Film Co., Ltd. Method and apparatus for melting gel-like substances

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE455778A (enrdf_load_html_response) * 1943-05-14 1900-01-01
DE977167C (de) * 1952-06-15 1965-04-22 Bayer Ag Vorrichtung zum kontinuierlichen Aufschmelzen von in stueckiger Form vorliegenden organischen thermoplastischen Kunststoffen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515201A (en) * 1948-05-27 1950-07-18 Dow Chemical Co Gear pump for metering and extruding hot organic thermoplastics
US3492791A (en) * 1966-11-30 1970-02-03 Ici Ltd Polymerisation apparatus and process
FR2406101A1 (fr) * 1977-04-12 1979-05-11 Union Carbide Corp Pompe a engrenage pour liquides visqueux
US4299559A (en) * 1979-06-01 1981-11-10 Fuji Photo Film Co., Ltd. Method and apparatus for melting gel-like substances

Also Published As

Publication number Publication date
FR880166A (fr) 1943-03-16
NL56648C (enrdf_load_html_response) 1900-01-01

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