Classifications

• • 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
  • H01B13/14—Insulating conductors or cables by extrusion
  • H01B13/145—Pretreatment or after-treatment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
  • B05D1/265—Extrusion coatings
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
  • B05D3/0218—Pretreatment, e.g. heating the substrate
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
  • B05D3/0254—After-treatment

Definitions

• the present invention relates to an apparatus and a method for applying one or more layers of a coating agent to electrically conductive wires.
• winding wires for electric coils are provided with insulating coatings.
• wire enamel is applied to the wires and cured. This step can be repeated between one and more than 30 times to ensure proper isolation. Thereafter, the finished painted wire is wound onto a spool.
• the hitherto known varnishing methods have in common that the wire can be annealed prior to painting in a so-called anneal and can be freed of drawing agent residues. Thereafter, the paint is applied either by a scraper, or a felt. Subsequently, the paint is cured in an oven. To minimize the escape of solvent vapors from the oven, the oven can be operated under a slight vacuum. Depending on the design, the temperature in the oven is between 400 and 700 ° C. The residence time of the wire in the oven depends on the wire diameter and the desired application thickness for the coating agent. During the treatment in the oven, solvent is evaporated and the wire enamel resin is crosslinked. The result is an insoluble, well-adhering film. The evaporated solvent can be largely burned by means of a catalyst. The heat generated by the exothermic process can in turn be used to heat the oven.
• a Device provided with a transport path for continuous passage transport of the wire material.
• a heatable heat-curing station for heat-curing a solvent-containing lacquer layer
• one of the heat-curing station upstream or downstream UV curing station for UV-radiation curing proposed the lacquer layer applied to the flag material.
• a device which is equipped with an insulating paint shaft through which an electrically conductive wire is transported by means of a conveyor.
• the Isolierlackschacht is provided on the inlet side with a paint application unit, which is connected to a container for the paint.
• the necessary thermal energy for baking the insulating paint is produced by a central heating device, wherein the hot air is directed by means of a blower counter to the conveying direction of the wire through the Isolierlackschacht and is guided in a circuit.
• the device described is further equipped with a parallel to the insulating paint booth paint booth, which, if necessary, a partial flow of H amongluftströmungsstoffsverteilers can be supplied.
• a device is also known in which a pipe system is provided for the circulation of hot air.
• a fan for maintaining the hot air circuit and openings in the pipe system for the supply of fresh air and the exhaust-free hot air are provided.
• the described methods and devices are in need of improvement from an energetic point of view. Because about 20% of the energy is lost through the radiation of the stove. About 20% of the exhaust air from the chimney is lost. The wire, which has to be heated every time, consumes about 55% of the energy from the Paint shop. The remaining about 5% are used to cure the paint.
• the present invention has now taken on the task of providing a device for applying an insulating coating on electrically conductive wires, which no longer has the disadvantages described.
• the resulting wires should correspond in their property profile at least the standard commercial wires, so that a recertification is not required.
• the device should work energy efficient. Disposal or treatment-requiring exhaust air should not arise.
• This object is achieved by a device for coating electrically conductive wires, which comprises a plurality of units in, for example, the following arrangement:
• the unit for supplying the wires is known in its configuration to the person skilled in the art, e.g. Wire drainage systems in which
• the coil is set up vertically or at an angle and fed via pulleys the wire to the following units. (These devices can be followed by a mechanical or electronic wire tension control system, so that the wire tension is controlled during Abwicking),
• the coil is driven by a motor for thicker wires to keep the wire tension in combination with a wire tension control system low and constant.
• Wire drainage systems exist in the state of the art in a wide variety of designs for wire-coating and extrusion systems.
• the unit for pretreatment of the wires is also known from conventional painting machines. This may be, for example, a so-called annealer. By this annealing is carried out a soft annealing of the wire and a release of Ziehstoffresten. It may also be a preheating, in which the wire z. B. is heated inductively.
• the unit for applying the coating agent can be configured depending on the coating agent to be used.
• the coating agents are chosen so that they are suitable for insulating the wires.
• thermoplastics can be used.
• Useful thermoplastics are e.g. described in EP 0030717.
• One way to apply the thermoplastics is to use extruders. That The coating material is introduced into the extruder via a storage container. From the extruder, the material is then applied to the wire.
• the extruder expediently has a head unit, which is connected downstream of the pretreatment unit.
• the extruder is preferably constructed so as to be directly connected to the head unit (hereinafter referred to as cross-spray head) so that the wire to be coated can be guided by the head unit.
• the extruder is adapted to the wire diameter and the amount of insulating material to be applied (i.e., coating amount).
• the extruder for example, plastic granules are added from a storage container.
• the material is melted and finally applied in the crosshead head on the pretreated wire.
• the device according to the invention is equipped with a unit for post-treatment of the coated wires.
• This post-treatment unit is preferably a unit in which the crosslinking of the thermoplastic takes place. This means that the applied thermoplastic is postcrosslinked and thus converted into a thermoset. This achieves a property profile similar to that of the conventional produced painted wires is comparable.
• the device for post-crosslinking can work with various common methods.
• the crosslinking can be done by means of heat in an oven.
• the post-crosslinking by radiation is possible. That Curing can take place by means of IR, NIR, UV or electron radiation.
• other common high-energy radiation or heaters can be used.
• the type of crosslinking method used depends on the particular thermoplastic used. Particularly preferred are UV or NIR radiations.
• a cooling section can be provided. This can be operated for example with cooling air or other media.
• thermoplastics can be applied to electrically conductive wires (for example, so-called varnish or winding wires), which meet the modern requirements, in particular the heat resistance.
• electrically conductive wires for example, so-called varnish or winding wires
• the production of the coated wires is simpler than is possible with conventional painting devices or processes, in which, as a rule, only one application method is used.
• the energy consumption per kilogram of manufactured coated wire is much lower than before.
• the system also requires less space overall than was previously known in the art. It applies to these wires, the previously known electrical and mechanical parameters, so that a recertification is not required. Due to the lower number of process parameters compared to the prior art, a higher process reliability is ensured.
• the unit 5 is designed as a so-called. Cross-spray head. This is connected to the extruder 4. In the extruder 4 coming from the reservoir 3 coming plastic granules are melted. The molten plastic granulate is then applied evenly over the crosshead on the wire.
• the cross-spray head 5 consists of the connection piece to the extruder outlet, the wire guide system, which is arranged centrally at right angles or at an angle to the extruder screw axis.
• the material is applied to the wire around the wire guiding system by means of distribution channels and a nozzle guide.
• the distribution channels are designed so that the material is evenly distributed around the central wire passage and the coating is centric.
• the essential parameters consist of the temperature profile over the extruder barrel length, the corner speed, the temperature of the crosshead and the material type.
• the coating thickness can also be controlled by the wire speed.
• the coated wire is fed to the unit 6. In this unit, the Crosslinking of the coating. This is followed by cooling via the unit 7. In the unit 8, the production of the end product takes place by winding the wire.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Application Of Or Painting With Fluid Materials (AREA)
• Coating Apparatus (AREA)
• Processes Specially Adapted For Manufacturing Cables (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=46851937

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (4)

Citations (10)

Family Cites Families (20)

• 2011
  • 2011-08-09 DE DE102011052520A patent/DE102011052520A1/de not_active Withdrawn
• 2012
  • 2012-08-07 CN CN201280038753.0A patent/CN103764300A/zh active Pending
  • 2012-08-07 EP EP12759377.0A patent/EP2741865A1/de not_active Withdrawn
  • 2012-08-07 US US14/237,493 patent/US20140203474A1/en not_active Abandoned
  • 2012-08-07 KR KR1020147006381A patent/KR20140054215A/ko not_active Ceased
  • 2012-08-07 WO PCT/EP2012/065437 patent/WO2013020977A1/de not_active Ceased
  • 2012-08-07 JP JP2014524363A patent/JP2014529843A/ja active Pending

Patent Citations (12)

Non-Patent Citations (1)

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