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US3596634A - Oven installation for use in the manufacture of a plurality of enameled wires - Google Patents

Oven installation for use in the manufacture of a plurality of enameled wires Download PDF

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Publication number
US3596634A
US3596634A US882124A US3596634DA US3596634A US 3596634 A US3596634 A US 3596634A US 882124 A US882124 A US 882124A US 3596634D A US3596634D A US 3596634DA US 3596634 A US3596634 A US 3596634A
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Prior art keywords
wire
plane
pass path
multigrooved
drying
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Expired - Lifetime
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US882124A
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English (en)
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August Fuchs
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • E04G21/121—Construction of stressing jacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/065—Insulating conductors with lacquers or enamels

Definitions

  • An oven body contains first and second drying retorts.
  • a plurality of wire-handling lines are provided, each of which is operable to move a wire to be enameled in a first direction along a first pass path through first enamel coating means and thereafter through said first drying retort in a first plane, then to move said wire in a second direction, which is opposite to the first, along a second pass path through second enamel coating means and thereafter through said second drying retort in a second plane, which is parallel to said first plane, and to repeat said movement of said wire in said first direction through said first enamel coating means and through said first retort in said first direction in said first plane along at least one additional odd-numbered pass path and through said second coating means and said second retort in said second direction in said second plane along at least one additional even-numbered pass path.
  • Said first and second planes are common to all said wire-handling lines.
  • Each of said wire-handling lines comprises first reversing means for guiding said wire from each odd-numbered pass path to the next succeeding even-numbered pass path, and second reversing means for guiding said wire from each but the last even-numbered pass path to the next succeeding odd-numbered pass path.
  • Said first reversing means comprises first axle means extending in said first plane, a first set of loose pulleys freely rotatably mounted independently of each other on said first axle means, second axle means extending in said second plane, and a second set of pulleys freely rotatably mounted independently of each other on said second axle means.
  • Said second reversing means of each of said wire-handling lines comprise a single multigrooved pulley.
  • Each of said wire-handling lines comprises a variable-speed drive unit and an endless tensile element operatively connecting said drive unit to said multigrooved pulley to drive the same, whereby said multigrooved pulley is operable to pull said wire through said drying retorts. All said multigrooved pulleys are rotatably mounted on a common axle.
  • This invention relates to an oven installation for use in the manufacture of a plurality of enameled wires, which installation comprises drying retorts, through which each wire is moved several times in mutually opposite directions in two parallel planes after individual enamel coating treatments and reversals until a coating having a desired thickness has been formed.
  • the oven 15 provided on one side with a separate, loose deflecting pulley for each pass of each wire, and on the other side with a single grooved pulley for each wire, which grooved pulleys are rotatably mounted on a common axle and by means of which the pull tending to move the wires through the drying retorts is maintained.
  • the oven is provided on that side which is opposite to the loose deflecting pulley with a common grooved roll for all wires and said roll is driven by a variable transmission and the diameters of the grooves for the successive reversals of each wire are so graded that a uniform tension is maintained and slip is avoided.
  • a drying retort after each reversal and the tension is minimized in each wire portion between reversals and will not increase cumulatively throughout the wire; the peripheral velocity of that common grooved roll controls the uniform speed of travel of all wires in the oven installation.
  • the finished insulated wire is wound up on a takeup reel, which is driven with a forward slip by means of a slip clutch so that the the takeup tension is adjustable ln that oven installation, a broken wire cannot be pulled without interference with the remaining wires so that the production with respect to such broken wires will be interrupted until the entire oven installation has been shut down. either because the production is no longer economical as'several wires have broken or for other operational reasons.
  • an oven installation of a different basic type has been developed for use in the manufacture of enameled wire.
  • an oven body incorporates mutually independent drying retorts in a number which corresponds to the number of wires so that reversing rolls which control the withdrawal of respective wires can be mounted separately of each other and the means for driving each of said rolls can be conveniently accommodated.
  • the individual wires are entirely independent of each other as regards the removal of any trouble as well as regards the speed at which the wires are withdrawn so that the diameter of each wire may be freely chosen. It is also possible to select any desired type of enamel for each wire.
  • These adjustable drive units for the grooved pulleys associated with the respective wires are preferably disposed between the oven body, these grooved pulleys and the wire passes moving in opposite directions and two axles each carrying a small loose individual pulley for each wire pass are preferably arranged a suitable distance apart on the opposite outer reversing point.
  • each wire-handling line is entirely independent of the others as regards the selection of the diameters of the wires to be treated and the speed at which these wires move through the drying retorts as well as in the case of any trouble
  • Each of the wires moving one beside the other through one and the same drying retort can be continuously controlled in speed between standstill and a maximum so that the wire can be pulled or readjusted or the wire-handling line may be altered without interference with the remaining production. just as in a single-line oven.
  • each wire-handling line are closely spaced on the common grooved pulley so that a relatively large number of closely spaced wire pass paths can be accommodated within a small space if an insulating enamel coating having a predetermined total thickness is required.
  • This arrangement will result in the application of very thin individual coats during each pass so that under given operating conditions the wires can be moved at a high speed through the drying retorts and the output as well as the quality of the insulation can be increased.
  • Another important advantage of the above-mentioned arrangement is the great range within which the width of the drying retort and with it the number of wire-handling lines to be installed in an oven installation can be selected.
  • Each independent wire-handling line providing for a large number of passes occupies only a fraction of the width of the retort so that even with a highly unfavorable ration between the length and width of the drying retort the temperature differences which may develop across the width of the retort will have no effect because the speed of travel in each wire-handling line can be entirely independently selected.
  • a single takeup reel may be provided for each wire-handling line or two reels may be provided for each line and arranged for a semiautomatic or fully automatic replacement. In the latter case, the full takeup reel is automatically replaced by an empty one without an interruption of the travel of the wire.
  • These takeup reels will be driven by means of slip clutches independently of the means for driving the associated grooved pulleys.
  • the takeup reels provided in the takeup section and associated each with a wirehandling line are driven each by a variable-tension motor, e.g., a so-called hyperbolic motor, the speed of which is automatically controlled in response to the speed of the associated driven grooved pulley
  • Hyperbolic motors are direct current motors having a hyperbolic operating characteristic (torquespeed characteristic
  • the for ward slip of each reel and the speed at which its wire is withdrawn are controlled in a simple manner by a pushbutton or the like and without a change of the adjustable tension of the wire, which remains constant regardless of the increasing diameter of the package.
  • each wire-handling line IS suitably engaged at its last groove by a pressure roller, by means of which the movement of the wire coming from the drying retort is maintained regardless of the tension eterted by the takeup reel.
  • a pressure roller by means of which the movement of the wire coming from the drying retort is maintained regardless of the tension eterted by the takeup reel.
  • this arrangement will avoid an interruption of the travel of the wire during a replacement of reels and any substantial takeup tension will be kept from the wire in the drying retort. where the wire is hot and can be stretched more easily Besides.
  • an automatic control device may be provided for stopping each wire-handling line during an interruption of its normal operation, e.g..
  • the oven installation according to the invention for use in the manufacture of enameled wire may be designed so that four drying re torts may be arranged one over the other in a common oven body and together with the associated guiding and reversing elements form two identical multiple-line enameling systems.
  • a plurality of wires are first moved in opposite directions, e.g., in the two upper drying retorts until an enamel primer coat in a desired thickness has been obtained, and this wire having a single enamel coat is reversed to the sectional grooved roll of the other (lower) enameling system and is moved through the two drying retorts of the latter, where the desired enamel cover coat is applied.
  • FIGS. 1 and 2 are, respectively.
  • a side elevation and a top plan view showing the so-called basic unit of such oven installation, comprising two drying retorts which are accommodated in a common oven body, and a total of eight lines for handling wires which are moved through both retorts.
  • FIG 3 is an enlarged view showing the grooved pulley of one wire-handling line and the drive unit for such pulley.
  • Two vertically spaced axles l2 and 12' carry small loose individual pulleys 13, 13 for each pass of the wire at the outer reversing point (which is on the right in the drawing). Involving only a small expenditure. this arrangement ensures that a sufficiently large spacing will be maintained between the upper and lower pass paths of each wire D.
  • the grooved pulleys 15 are mounted on the common axle 14, which is disposed on the left of the oven body 10. Each of the grooved pulleys 15 is associated with one wire D and is driven from a separate, speed-variable electric motor 16 by a V-belt 16' or the like. These drive units 16 will determine the speed of travel of the wire in the oven installation and are suitably arranged in the space between the oven body 10 and the grooved pulleys 15 between the upper and lower wire passes so that the oven installation can be controlled without obstruction.
  • the wire After each application of an enamel coat to a wire D in one of the enamel coating vessels Ila and 1111, the wire is reversed by one of the reversing systems 13-13 and 14-15 disposed on opposite sides of the oven and is then moved through one of the two drying retorts 10a and 10b in the oven body 10. The wire is moved through these two retorts in mutually opposite directions and in a number of passes until the insulating enamel coating has the desired total thickness.
  • the finished enamel wire D which leaves the oven body 10 after the last pass is held from below by means ofa pressure roller 17 at the last groove of the driven grooved pulley 15; this is the last groove on the right in FIG. 3.
  • each finished enameled wire D which is withdrawn from the grooved pulley 15 is supplied to the takeup station, where it is wound up on the associated takeup reel 21
  • Each takeup reel 21 is driven with a forward slip by a separate variable-tension motor 22, by means of which the tension of the wire D being wound up can be adjusted.
  • the oven body 10 also carries a device for threading the wires.
  • This threading device consists of an endless belt 19, which extends through both drying retorts 10a and 10b and cooperates with guide pulleys 18, which are slidable throughout the width of the oven from one wire-handling line to the other on an axle. on which they are rotatably mounted. Two of said axles are disposed on respective sides of the oven body 10.
  • the arrangement may be such that the enamel coating vessels 11a and 11b, which precede the oven body 10 in the direction of movement of each wire pass, are divided into compartments, each of which is associated with one wire D so that difierent kinds of enamel may be applied to different wires.
  • the several compartments of the enamel coating vessels 11a and 11b preceding the oven body 10 may be separately supplied with enamel in a controlled manner; this supply may be automatically controlled in dependence on the desired thickness of the enamel coat. Because the supply of enamel IS separately metered, e.g., by means of a metering pump, it is sufficient in this arrangement to supply enamel at the rate which is required to obtain a coat having a predetermined thickness.
  • This metering pump associated with each wire D may be automatically controlled in dependence on the wire diameter so that a selected thickness of coat may be maintained most accurately
  • the oven installation according to the invention for the manufacture of enameled wire is not restricted to the embodiments which are described and shown here but different structural changes in the oven installation may be effected to meet special requirements.
  • wires to be coated with insulating enamel other elongated elements or profiled rods may be coated with enamel or other varnishes or paints or with other liquid to viscous binders.
  • the oven installation according to the invention may comprise, e.g., four drying retorts, which are superimposed and accommodated in a common oven body 10 and together with the associated guiding and reversing elements 15-13 form two identical multiple-line enamel coating systems.
  • several wires D may first be moved through the two upper retorts and may then be reversed by the respective individual pulleys l3 and 15 after they have been coated with enamel in the respective enamel coating vessels 1 1 and may be repeatedly moved in opposite directions until an enamel primer coat in the desired thickness has been obtained.
  • each of the two superimposed grooved r0115 disposed on one side of the oven 10 comprises a plurality of sections, each of which is associated with one wire, and the roll sections associated with a given wire are synchronously driven by a common control unit and independently of the other roll sections. This control unit thus determines the speed of travel. Higher speeds may be obtained if drying passes are provided between enamel coating passes in known manner.
  • An oven installation for use in the manufacture of enameled wires which comprises an oven body,
  • a plurality of wire-handling lines each of which is operable to move a wire to be enameled in a first direction along a first pass path through said first enamel coating means and thereafter through said first drying retort in a first plane, then to move said said wire in a second direction, which is opposite to the first, along a second pass path through said second enamel coating means and thereafter through said second drying retort in a second plane, which is parallel to said first plane, and to repeat said movement of said wire in said first direction through said first enamel coating means and through said first retort in said first direction in said first plane along at least one additional odd-numbered pass path and through said second coating means and said second retort in said second direction in said second plane along at least one additional even-numbered pass path,
  • said first and second planes being common to all said wirehandling lines
  • each of said wire-handling lines comprising first reversing means for guiding said wire from each odd-numbered pass path to the next succeeding even-numbered pass path, and second reversing means for guiding said wire from each but the last even-numbered pass path to the next succeeding odd-numbered pass path,
  • said first reversing means comprising first axle means extending in said first plane, a first set of pulleys freely rotatably mounted independently of each other on said first axle means, second axle means extending in said second plane, and a second set of pulleys freely rotatably mounted independently of each other on said second axle means,
  • said second reversing means of each of said wire-handling lines comprising a single multigrooved pulley
  • each of said wire-handling lines comprising a variable-speed drive unit and an endless tensile element operatively connecting said drive unit to said multigrooved pulley to drive the same, whereby said multigrooved pulle'y is operable to pull said wire through said drying retorts,
  • said installation comprising a common axle, on which all said multigrooved pulleys are rotatably mounted, and
  • threading means comprising an endless belt extending through said oven and transversely sliiftable seriatim to each of said plurality of wire-handling lines.
  • said takeup station further comprising a plurality of takeup motors, each of which is operatively connected to one of said reels and operable to maintain a predetermined adjustable tension in the wire moving from said multigrooved pulley to said reel, and
  • control means arranged to control the speed of each of said takeup motors in dependence on the speed of the associated multigrooved pulley.
  • each of said takeup motor is a direct current electric motor having a hyperbolic torque-speed characteristic.
  • each of said multigrooved pulleys has a final delivery groove, which is aligned with said last even-numbered pass path, and
  • each of said wire-handling lines comprises a pressure roller which contacts said multigrooved pulley at said final delivery groove to hold said wire in frictional driving contact with said multigrooved pulley.
  • each of said wire-handling lines comprises an automatic stop motion arranged to interrupt the operation of said wire-handling line in response to a predetermined change in operating conditions.
  • said first, second, third and fourth drying retorts are arranged one over the other, and which comprises third and fourth enamel coating means and a plurality of additional wire-handling lines, each of which is operable to move a wire to be enameled in said first direction along a third pass path through said third enamel coating means and thereafter through said third drying retort in a third plane, then to move said wire in said second direction through said fourth enamel coating means and thereafter through said fourth drying retort in a fourth plane, and to repeat said movement of said wire in said first direction through said third enamel coating means and'through said third retort in said first direction in said third plane along at least one additional odd-numbered pass path and through said fourth coating means and said fourth retort in said second direction along at least one additional even-numbered pass path,
  • said third and fourth planes being parallel to said first and second planes and common to all said additional wirehandling lines
  • each of said additional wire-handling lines comprising third reversing means for guiding said wire from each oddnumbered pass path in said third plane to the next succeeding even-numbered pass path insaid fourth plane, and second reversing means for guiding said wire from each but the last even-numbered pass path in said fourth plane to the next succeeding odd-numbered pass path in said third plane,
  • said third reversing means comprising third axle means extending in said third plane, a third set of loose pulleys freely rotatably mounted independently of each other on said third axle means, fourth axle means extending in said fourth plane, and a fourth set of pulleys freely rotatably mounted independently of each other on said fourth axle means,
  • said fourth reversing means of each of said additional wirehandling lines comprising a single multigrooved pulley
  • each of said additional wire-handling lines comprising a variable-speed drive unit andan endless tensile element operatively connecting said drive unit to said multigrooved pulley to drive the same, whereby said multigrooved pulley of each of said additional wire-handling lines is operable to pull said wire through said third and fourth drying retorts,
  • said installation comprising an additional common axle.
  • on handling lines being adapted to receive said wire when it which all said multigrooved pulleys of said additional has moved along the last of said even-numbered pass wire-handling lines are rotatably mounted. and paths in said second plane.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coating Apparatus (AREA)
  • Drying Of Solid Materials (AREA)
US882124A 1968-12-18 1969-12-04 Oven installation for use in the manufacture of a plurality of enameled wires Expired - Lifetime US3596634A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1233568A AT284931B (de) 1968-12-18 1968-12-18 Vielgang-Ofenanlage zur Herstellung von Lackdrähten

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US3596634A true US3596634A (en) 1971-08-03

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AT (1) AT284931B (de)
DE (1) DE1957504A1 (de)
FR (1) FR2026480A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780697A (en) * 1972-05-11 1973-12-25 Beloit Corp Reversible coater
US4365790A (en) * 1981-05-19 1982-12-28 Mag Maschinen Und Apparatebau Gesellschaft Mbh Plant for producing enameled wire using an inline process
US4717604A (en) * 1986-05-27 1988-01-05 Essex Group, Inc. Die bar carrier and method
US4759960A (en) * 1986-12-12 1988-07-26 Essex Group, Inc. Die bar with integral locking means
US4773353A (en) * 1986-12-29 1988-09-27 Essex Group, Inc. Die bar carrier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843895C3 (de) * 1978-10-07 1981-11-26 Felten & Guilleaume Carlswerk AG, 5000 Köln Verfahren zur Herstellung von mit Lack isolierten elektrischen Leiterdrähten

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US894592A (en) * 1905-05-09 1908-07-28 Gen Electric Wire-coating machine.
GB253906A (en) * 1925-06-16 1927-07-07 Albert Emile Pierre Girard A method of applying coatings to wires, cables, and the like, and compositions therefor
US1782425A (en) * 1926-04-24 1930-11-25 Western Electric Co Apparatus for coating strands
US2059441A (en) * 1933-01-03 1936-11-03 Case Pomeroy & Company Inc Coating composition for wire and process
US2087145A (en) * 1936-03-30 1937-07-13 Wheeler Insulated Wire Company Enameling machine
US2794542A (en) * 1953-07-21 1957-06-04 American Viscose Corp Method and apparatus for lacing thread-advancing rotors
US2943598A (en) * 1956-10-08 1960-07-05 Gen Electric Wire coating apparatus
US3432082A (en) * 1967-01-05 1969-03-11 Broadcast Electronics Inc Common capstan mounting system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US894592A (en) * 1905-05-09 1908-07-28 Gen Electric Wire-coating machine.
GB253906A (en) * 1925-06-16 1927-07-07 Albert Emile Pierre Girard A method of applying coatings to wires, cables, and the like, and compositions therefor
US1782425A (en) * 1926-04-24 1930-11-25 Western Electric Co Apparatus for coating strands
US2059441A (en) * 1933-01-03 1936-11-03 Case Pomeroy & Company Inc Coating composition for wire and process
US2087145A (en) * 1936-03-30 1937-07-13 Wheeler Insulated Wire Company Enameling machine
US2794542A (en) * 1953-07-21 1957-06-04 American Viscose Corp Method and apparatus for lacing thread-advancing rotors
US2943598A (en) * 1956-10-08 1960-07-05 Gen Electric Wire coating apparatus
US3432082A (en) * 1967-01-05 1969-03-11 Broadcast Electronics Inc Common capstan mounting system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780697A (en) * 1972-05-11 1973-12-25 Beloit Corp Reversible coater
US4365790A (en) * 1981-05-19 1982-12-28 Mag Maschinen Und Apparatebau Gesellschaft Mbh Plant for producing enameled wire using an inline process
US4717604A (en) * 1986-05-27 1988-01-05 Essex Group, Inc. Die bar carrier and method
US4759960A (en) * 1986-12-12 1988-07-26 Essex Group, Inc. Die bar with integral locking means
US4773353A (en) * 1986-12-29 1988-09-27 Essex Group, Inc. Die bar carrier

Also Published As

Publication number Publication date
FR2026480A1 (de) 1970-09-18
AT284931B (de) 1970-10-12
DE1957504A1 (de) 1970-07-02

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