US3329125A - Electrostatic flocking apparatus - Google Patents

Electrostatic flocking apparatus Download PDF

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Publication number
US3329125A
US3329125A US364147A US36414764A US3329125A US 3329125 A US3329125 A US 3329125A US 364147 A US364147 A US 364147A US 36414764 A US36414764 A US 36414764A US 3329125 A US3329125 A US 3329125A
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US
United States
Prior art keywords
screen
cover
drum
flock
fibers
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
US364147A
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English (en)
Inventor
Grossteinbeck Rolf
Holtz Hans
Rabenhorst Helmut
Willicks Winfried
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Battelle Institut eV
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Battelle Institut eV
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 Battelle Institut eV filed Critical Battelle Institut eV
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Publication of US3329125A publication Critical patent/US3329125A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H11/00—Non-woven pile fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
    • B05C19/001—Flocking
    • B05C19/002—Electrostatic flocking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 

Definitions

  • This invention relates to an apparatus for electro-static flocking of the type where suitably prepared fibers are deposited from a rotating cylindrical screen onto a material previously coated with an adhesive, whereby a high voltage is applied to said cylindrical screen and the screen is covered by a sheet-metal hood.
  • An apparatus of this type where said cover is bent at a certain distance almost entirely around the periphery of the cylindrical screen so as to leave only a small slot for the flock.
  • the cover in said known apparatus is suspended insulated from the electrodes and can, therefore, assume any voltage with respect to the cylinder screen. With such an apparatus, no exact dosage of the flock per unit area of the fabric to be coated can be obtained, and the flock density on the finished fabric is, therefore, subject to more or less strong variations.
  • the flocking apparatus described hereinabove was modified as followsf
  • the cylindrical screen or perforated drum is rotated on a perforated hollow shaft which ensures a steady feed of flock;
  • the cover has a cross-section in form of a bell, and the rim of the bell is extended outwardly and slightly curled upwardly;
  • a wire screen is inserted into the opening of the cover.
  • Said wire screen and the cover are connected to the same terminal of a high voltage source as the cylindrical screen so that there is no electric field between cover, cylindrical screen, and wire screen.
  • FIG. 1 is a perspective view of an apparatus according to the invention, parts broken away;
  • FIG. 2 is a transverse sectional view
  • FIG. 3 a sectional elevation of the apparatus
  • FIG. 4 is a view, partly in cross-section of an apparatus containing three rotating drums in parallel arrangement.
  • numeral 1 indicates a rotating perforated drum of which the shell consists of a wire gauze or screen or of perforated sheets.
  • the shell consists of a wire gauze or screen or of perforated sheets.
  • Such shell elements are readily exchanged which makes it possible to adapt the meshes of the gauze or the size of the perforations to the flow properties of the flock.
  • We may also arrange two or more such drums in series, particularly when a large amount of fibers is to be charged per unit of time.
  • the direction of rotation of the drums may be with, or opposite to, the direction of travel of the adhesive layer 10.
  • the fiber flock is introduced into the drum continuously by means of the conveyor screw 13 through the perforated hollow shaft 12, driven by disc 24.
  • the speed of rotation of the conveyor screw by means of driving disc 20 is infinitely variable, thus ensuring at all times a uniform charge ofthe drum.
  • the hopper 14, equipped with a stirrer 15 driven by discs 21, provides for the admission of the fiber flock from a storage bin to the conveyor screw.
  • the rotation of the drums imparts turbulent motion to the fibers which fall through the meshes of the screen surface into the distributing space 6 (FIG. 2) defined by the cover 2, drum 1, and wire screen 3. All these members are connected to the'same high voltage so that no electric field forces can act on the fiber flock in the distributing zone 6.
  • the fibers fall only under the influence of gravity and centrifugal forces out of the rotating drum in the direction toward the screen 3.
  • the form of the cover 2 is adapted to the trajectory of the fibers and has a bellshaped cross-section. At the inside, the cover is completely smooth and without projections or edges in order to prevent adhesion of the flock to the walls and formation of lumps.
  • the amount of fibers falling through the meshes of the screen is a function of the speed of rotation and the amount of fibers inside the drum only.
  • the speed of rotation By varying the speed of rotation while maintaining the charge constant, the amount of flock deposited can be exactly controlled.
  • a low speed of rotation of the drum (30 rpm.) produces especially uniform flock densities on the adhesive-coated material 10, provided that the flock has good flow properties.
  • the screen 3 is vertically displaceably mounted on vibrating members 17 and consists essentially of metal wires mounted as a net in a metal frame.
  • the wires have a diameter of about 0.3 to 0.5 mm.
  • the screen may be rigidly arranged or it may be vibrated horizontally and/ or vertically at various frequencies by vibrators 18.
  • the distance between screen 3 and the material 10 to be flocked is variable along members 17 and has to be adapted to the type of flock and adhesive used.
  • the field strength obtained between the screen 3 and the carrier 11 is preferably in the range of 4 to 6 kv./cm.
  • the boundary electrodes are shaped so as to weaken the field strength with increasing distance between the support 11 and the electrodes 4, 16. It is important to avoid a deformation of the lines of force. Said lines should follow a path which is as vertical as possible because the fibers impinging on the adhesive layer align themselves in the direction of the force lines. When the force lines are inclined to the vertical, the adhered fibers take the same inclined position so that they prevent subsequently at- 3 tracted fibers to reach the adhesive layer and to become anchored therein. The weaker the field becomes, the slower becomes the oscillating movement of the fibers between the boundary electrode and the adhesive layer, until such movement ceases completely.
  • FIG. 4 An embodiment of the invention using three parallelly arranged drums is shown in FIG. 4.
  • Example 1 Diameter of drum 300 mm., screen aperture 1.2 mm. Speed of rotation of drum 30 r.p.m. (against the direction of travel of the material),belt speed 1.1 m./ sec.
  • Flock fibers 20 den./ 2.5 mm., blue
  • Example 2 Diameter of drum 300 mm.; width of mesh 12 mm.
  • An electrostatic flocking apparatus comprising a perforated hollow shaft, a perforated rotating elongated drum driven by said shaft, a cover in form of a belt covering said drum in spaced relationship thereto, the rim of said cover being outwardly extended and slightly bent upwardly, a screen in the bottom of said cover, a high alternating voltage source, said drum, cover, and screen being connected to the same pole of said high voltage source, a traveling support connected to the other pole of said high alternating voltage source and located below said screen and spaced therefrom to produce an electric field therebetween, and means feeding flock into said perforated shaft.
  • the apparatus claimed in claim 1 comprising a conveyor screw inside said shaft and vertical feed hoppers feeding flock into the ends of said shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nonwoven Fabrics (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Coating Apparatus (AREA)
US364147A 1963-05-02 1964-05-01 Electrostatic flocking apparatus Expired - Lifetime US3329125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB71727A DE1286433B (de) 1963-05-02 1963-05-02 Vorrichtung zum elektrostatischen Beflocken von Klebeschichten mit Fasern

Publications (1)

Publication Number Publication Date
US3329125A true US3329125A (en) 1967-07-04

Family

ID=6977157

Family Applications (1)

Application Number Title Priority Date Filing Date
US364147A Expired - Lifetime US3329125A (en) 1963-05-02 1964-05-01 Electrostatic flocking apparatus

Country Status (8)

Country Link
US (1) US3329125A (enrdf_load_stackoverflow)
AT (1) AT243955B (enrdf_load_stackoverflow)
BE (1) BE647324A (enrdf_load_stackoverflow)
DE (1) DE1286433B (enrdf_load_stackoverflow)
GB (1) GB1017853A (enrdf_load_stackoverflow)
LU (1) LU45865A1 (enrdf_load_stackoverflow)
NL (1) NL6404444A (enrdf_load_stackoverflow)
SE (1) SE200196C1 (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426730A (en) * 1964-09-28 1969-02-11 Head Wrightson & Co Ltd Apparatus for coating continuously moving strip material with powders
US3486484A (en) * 1965-09-23 1969-12-30 British Iron Steel Research Formation of coatings
US3678894A (en) * 1969-12-24 1972-07-25 Indev Inc Flocking
US3798048A (en) * 1971-07-27 1974-03-19 Nyvel Corp Method and apparatus for electrostatically coating an object
US3874334A (en) * 1973-08-29 1975-04-01 Indev Inc Rotatable grid assembly
US3979529A (en) * 1972-10-31 1976-09-07 Usm Corporation Electrostatic application of thermoplastic adhesive
WO2007031136A1 (de) * 2005-09-13 2007-03-22 Gottlieb Binder Gmbh & Co. Kg Verfahren und vorrichtung zum herstellen von befestigungskörpern
CN103264009A (zh) * 2013-05-29 2013-08-28 无锡市医疗仪器有限公司 一种植绒滚轮及其植绒方法
CN108014977A (zh) * 2016-11-03 2018-05-11 天津科焱科技有限公司 一种地毯植绒机头

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA200102941B (en) * 2000-04-13 2001-05-22 Gerhard Rosenberg Extruded, injection moulded or blow moulded pipe, fitting of component.
CN114273143B (zh) * 2021-12-03 2023-02-10 中科芯(苏州)微电子科技有限公司 晶圆装片用涂胶装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2221338A (en) * 1936-10-21 1940-11-12 Research Corp Deposition of material
US2356489A (en) * 1939-08-19 1944-08-22 Behr Manning Corp Apparatus for coating
US2715585A (en) * 1951-03-15 1955-08-16 Velveray Corp Electrostatic flocking procedures and apparatus
US3255730A (en) * 1962-02-26 1966-06-14 Grohl Edmund Device for the production of unicoloured and multicoloured tufted materials

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2218445A (en) * 1936-09-24 1940-10-15 Behr Manning Corp Production of pile surface materials
DE1030738B (de) * 1953-02-12 1958-05-22 Freudenberg Carl Kg Vorrichtung zum Beflocken, insbesondere von Lederteilen
DE1051237B (de) * 1954-06-26 1959-02-26 Wirth Arno H Vorrichtung zum elektrostatischen Beflocken von Koerpern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2221338A (en) * 1936-10-21 1940-11-12 Research Corp Deposition of material
US2356489A (en) * 1939-08-19 1944-08-22 Behr Manning Corp Apparatus for coating
US2715585A (en) * 1951-03-15 1955-08-16 Velveray Corp Electrostatic flocking procedures and apparatus
US3255730A (en) * 1962-02-26 1966-06-14 Grohl Edmund Device for the production of unicoloured and multicoloured tufted materials

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426730A (en) * 1964-09-28 1969-02-11 Head Wrightson & Co Ltd Apparatus for coating continuously moving strip material with powders
US3486484A (en) * 1965-09-23 1969-12-30 British Iron Steel Research Formation of coatings
US3678894A (en) * 1969-12-24 1972-07-25 Indev Inc Flocking
US3798048A (en) * 1971-07-27 1974-03-19 Nyvel Corp Method and apparatus for electrostatically coating an object
US3979529A (en) * 1972-10-31 1976-09-07 Usm Corporation Electrostatic application of thermoplastic adhesive
US3874334A (en) * 1973-08-29 1975-04-01 Indev Inc Rotatable grid assembly
WO2007031136A1 (de) * 2005-09-13 2007-03-22 Gottlieb Binder Gmbh & Co. Kg Verfahren und vorrichtung zum herstellen von befestigungskörpern
CN103264009A (zh) * 2013-05-29 2013-08-28 无锡市医疗仪器有限公司 一种植绒滚轮及其植绒方法
CN103264009B (zh) * 2013-05-29 2016-09-14 无锡市医疗仪器有限公司 一种植绒滚轮及其植绒方法
CN108014977A (zh) * 2016-11-03 2018-05-11 天津科焱科技有限公司 一种地毯植绒机头

Also Published As

Publication number Publication date
AT243955B (de) 1965-12-10
GB1017853A (en) 1966-01-19
LU45865A1 (enrdf_load_stackoverflow) 1964-06-13
DE1286433B (de) 1969-01-02
BE647324A (enrdf_load_stackoverflow) 1964-08-17
SE200196C1 (enrdf_load_stackoverflow) 1965-11-30
NL6404444A (enrdf_load_stackoverflow) 1964-11-03

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