FR2551364A1 - Device for spraying cut textile fibres. - Google Patents

Abstract

The device consists of a casing 1, closed by a screen 2 and fitted with a hollow handle 3 into which is inserted a detachable high-voltage supply cable, the casing comprising a high-safety electrode 5 to 12 which prevents any disruptive discharge and which can rotate about the axis of the handle of the scoop thus formed. No fluid, mechanical (compressed air) or chemical, is necessary for its operation. Among the the applications of the invention mention may be made of manual flock-coating of small articles (decorative or utilitarian) and of the possibility of use by private individuals.

Description

The present invention relates to projection devices

  cut textile fibers, and more particularly cut textile fibers known as "Flocks".

  It is S 4 it that such textile fibers (natural, artificial or synthetic), have lengths of the order of 0.1 to 10 mm. In the following description, they will be

called fibers.

  It is known to project fibers onto a previously glued surface, using an air flow. It is also known a process called electrostatic beating combining the projection of the fibers in an electric field with mechanical beating, often through a sieve Such methods and the devices implementing them have the disadvantage of involving technologies which are difficult for individuals to access: compressed air, motors and mechanical devices

complex and expensive.

  The device according to the invention allows the craftsman or the individual as well as companies or communities not provided with

  these technologies (and more specifically compressed air), to fill with fibers (we say flocking), a support previously glued (with a brush or a hand sprayer for example).

  According to the invention, the device is characterized in that it consists of a box, closed by a fixed, mobile or removable screen, and provided with a hollow handle in which a cable 25 connected to a power supply is inserted. in high voltage; the case being inside, provided with an electrode connected to said cable and all the constituent materials of the device (apart from the electrically active part of the electrode), being made of insulating material ("Afco" or PVC for example) , the fiber loading 30 being able to be carried out by the sieve or by any other opening

practiced in the device.

  In the following description, the device will be called shovel.

  The invention is described below with reference to the accompanying drawings. 5 on which we can see: Figure 1, a sectional view of the projection device of

fibers, shovel-like device.

  Figure 2, a sectional view of the end of the cable

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  electrical connection between the shovel and the high voltage supply. As shown in Figure 1, the device comprises a housing 1, closed by a sieve 2 fixed, mobile or removable, and 5 provided with a hollow handle 3, fixed to the housing 1 by screws 4 ("Nylon" for example), these screws 4 now in the housing 1 a bent tube 5 forming an electrode support (or leaving the electrode free to rotate around the axis of the handle 3) Said electrode consists of a resistor 11 embedded in a iso10 lante 10 material (example: two-component epoxy resin), resistance of which one of the terminals 12 called "tail" is the place where the high voltage is applied to the fibers This "tail" being of very low mass, the risk of discharge disruptive is zero, which constitutes additional protection, especially since this "tail" is located in a recess relative to the bent tube 5 This device of the shovel type requiring no chemical or mechanical fluid to operate, can be connected to a high voltage supply (electrostatic generator, convert issuer etc), by means of a cable inserted in the handle 20 of said shovel which can thus be disconnected from its high voltage supply to be recharged with fibers or changed

  itself (shovels of different dimensions).

  FIG. 2 represents a detail of the end of such a cable consisting of a flexible tube 6 protecting an electric 25 high-voltage cable 7 with an electrical conductor 8 connected to a resistor 11 (for example 10 million Ohms) it even connected to a connector 13 complementary to that of the shovel (by

example: a female banana plug).

  The tube 6 projects beyond the connector 13 in order to ensure greater security by preventing anyone from touching the end

conductive cable.

  The nesting of such a cable in the handle 3 of the shovel is easy and quick and constitutes a guarantee of safety for the manipulator, by avoiding being in contact with conductive parts carried at high voltage, and by avoiding priming

electric arcs.

  Such a device has the advantage of not requiring air c: lm-rnr e for the rrnjection of the fibers and for the control of

  pneumatic relays included in some generators.

  Its shovel can be safely disconnected from the cable in order to be recharged with fibers or to be changed to another other size. The cable can be handled without danger, even under tension. The fibers are introduced into the shovel which is then closed by the sieve. The power supply being under tension, it suffices to position the shovel provided with the cable from the high voltage power supply, sieve at the bottom and horizontally, then d 'impril O sea with a shovel a horizontal back and forth movement so that the fibers crossing the sieve following the parallel lines of the electric field $ without agglomerates, in fine rain with almost parallel fibers come to crash on the previously glued support, and perpendicular to said support, this' 5 surport being itself placed on an electrically conductive plate and connected to the ground. The device which is the subject of the invention can be used for removing fibers from any glued support (flocking for example), and can be used in industry for small productions and especially in the field of crafts and large

  public, either for artistic works, domestic or industrial uses.

  An interesting application is the provision to the general public and for a reasonable cost, of a complete set 25 of flocking (shovel plus high voltage supply), for the

  production of various objects, artistic or other.

  It goes without saying that changes in the form of the

  -e.le, its handle and its electrode, as well as the constituent materials of the device object of the present invention, only 3 C are flush enough to depart from the framework of the present invention.

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Claims (6)

  1 Device for projecting cut textile fibers, characterized in that it consists of a shovel (1) closed by a sieve (2), and comprising an electrode and a handle   hollow (3), into which the high voltage electrode supply cable is inserted.   2 Device according to claim 1, characterized in that the active part of the electrode is constituted by the tail   a protective resistor (11) avoiding the risk of disruptive discharge.   3 Device according to claim 1, characterized in that   that the shovel has a removable connection with its high voltage power cable.   4 Device according to claim 1, characterized in that the disconnectable part of the electrode (9), comprises a par15 tie in extension (3) allowing overlapping of the parts   conductive by the high voltage power cable.   Device according to claims 1 to 4, characterized   in that the screen (2) is mobile or removable.   6 Device according to claims 1 to 5, characterized   in that the fiber loading is effected by an opening   specific in the shovel, separate from the sieve.   7 Device according to claims 1 to 6, characterized   in that the electrode (5 to 12) is mounted therein rotating around   the axis of the handle in order to take different orientations.