DE69905762T2 - DEVICE FOR APPLYING A REFLECTIVE MATERIAL TO A SUBSTRATE - Google Patents

Description

Device for applying a reflective material on a substrate

The present invention relates a device for applying a strip reflective Material, which device contains two fluid delivery systems, means for sequentially moving a tape relative to said two Hydration systems, and heating means for heating of the band after each fluid delivery system.

The material can be purely reflective Properties or reflective properties combined with phosphorescent or have fluorescent properties.

A method for producing a such a reflective material, wherein a cloth with a resin solution, the white Contains particles, is treated and then coated with a transparent resin containing glass beads becomes in DATABASE WPI, section CH. Week 8420, Derwent Publications Ltd., London, UK; Xpoo2113870; & JP 59 059436 discloses.

EP-A-0-573.772 discloses a machine for the Production of a reflective material of a different kind. This machine includes a coating station where a resin binder with a high Saturation color pigment or a fluorescent pigment on a thermobound woven material is applied, and drying agent, where the water on the surface is evaporated from the material and a binder-pigment migration to the surface arises. Indeed a single layer is applied to a substrate.

The invention aims to provide a To provide a device that allows a reflective material in two layers on relatively simple, fast and flexible way to apply to a substrate.

The object is achieved according to the invention by that the heating means contain two rotating heated drums over which the band is to lead and the converging axes have, so that the band, if it is over this Drumming is conducted, automatically towards the end, where the axes are closest to each other lie, wherein at least the second fluid supply system across from This pair of drums is defined as defined in claim 1.

Other designs are in the accompanying claims 2 to 6 to find.

The device includes practically at least one calender, through which the band is leveling and Smooth that of the fluid delivery systems attached layers led can be.

The calender contains two rollers and means for Driving at least one of these roles, leaving a role with a higher one Peripheral speed turns than the other one.

The heating means comprise two rotating ones heated drums, over who led the band is at least the second fluid delivery system with respect to this Drum pair is arranged.

The two drums have converging axes, so that the tape automatically moves to the end where the axes when the tape over led these drums will be closest to each other.

To better the features of the invention to explain The following preferred embodiments of a device for Applying a reflective material to a substrate according to the invention described as an example, with reference to the accompanying drawings is taken, in which:

1 schematically illustrates a side view of an apparatus for applying a strip of reflective material to a substrate according to the invention;

2 schematically a plan view of the device 1 represents;

the 3 and 4 in the 1 With F3 respectively. F4 represent marked parts on a larger scale;

the 5 to 7 also on a larger scale the in 2 With F5 . F6 respectively. F7 represent marked parts;

8th a part analogous to the one in 3 but with reference to another embodiment of the invention;

9 the part analogous to that in 8th but with reference to yet another embodiment of the invention.

To a reflective material according to the invention two layers are applied successively to a substrate, which consists of a base fabric in the example given, interwoven in a fine structure and made of a UV-resistant synthetic material, in particular Polyester.

The first layer is made of a polymer solution, consisting of acrylic polyurethane or acrylic vinyl acetate on an aqueous Base on which one or more pigments have been added, in particular Color pigments and / or metal pigments.

According to a variant, the Pigments wholly or partly from a phosphorescent or fluorescent material, if the reflective strip must also be phosphorescent or fluorescent.

This polymer solution is required in the Shares over the tissue distributed, z. B. by immersion, by means of a nozzle by means of a vibrating roller or by means of a scraper.

The base layer is then dried, which by heating can be accelerated.

The second layer, which is preferably applied only after the first layer has dried, is transparent and consists of light-reflecting the particles, especially glass beads, in a transparent base consisting of resin, polyurethane, polyvinyl chloride, acrylic or the like on an aqueous basis.

This layer is dried and chemically stabilized, whereupon the entire coating applied to the fabric is leveled and being smoothed, by the mentioned Tissue is rolled with the two layers between two rolls, taking the roll which is in contact with the coating is preferably with a higher one Peripheral speed turns than the other one.

Immediately after the second layer has been applied and before it is dried, the substrate can with the two Layers of ultrasonic vibrations are exposed, causing the light-reflecting particles on the surface the second layer emerge, allowing a higher reflection of the reflective Material is achieved.

The method described above is especially suitable for applying a strip of reflective material to a woven tape, the layers are dried and leveled applied can, while The tape is unrolled from a roll and rolled up on another roll becomes.

The 1 to 7 illustrate a device for applying a tape to a tape in such a manner.

This device consists essentially of a frame 1 , a transport mechanism 2 for a woven band 3 , two fluid delivery systems consisting of nozzles 4 and 5 for applying the two above-mentioned layers, means consisting of two internally heated drums 6 and 7 for heating the band 3 behind each nozzle 4 and 5 , a refrigerator 8th a calender 9 and a roll-up mechanism 10 ,

The transport mechanism 2 consists of a roll holder 11 for a coil 12 to which the band 3 is wound up, and two guide rollers 13 and 14 which are pressed against each other and so on the frame 1 are fixed, that they turn loose.

The two drums 6 and 7 which are considerably longer than the width of the tape 3 , lie on camps in the frame 1 so that they extend across the device and with one end opposite the transport mechanism 2 are arranged.

As in 2 represented are the axes of the two drums 6 and 7 not parallel to each other but converge at one end.

These drums 6 and 7 are hollow and can be heated, z. B. by means of a performed hot air or other stream.

The nozzle 4 is at the frame 1 over the way from band 3 attached, between the mentioned transport mechanism 2 and the first drum 6 , towards one end of this drum 6 , and in the example given has a nozzle opening which is narrower than the tape 3 ,

The nozzle 5 is identical, but she is at the frame 1 practically half the length of this drum 6 over the way from band 3 attached.

The refrigerator 8th consists of a number of conductors, for example winches 15 , for the band 3 alternating over and under the frame 1 and are fixed transversely to the device.

The calender 9 consists of two rolls 16 and 17 , one above the other on the frame 1 are attached. One of the rollers, ie, in the present example, the upper roller, is driven by an electric motor 18 driven, as in the 1 and 7 shown. The other role 17 is via a transmission 19 as in 4 shown driven so that their peripheral speed is lower.

The calender 9 also forms the transport device of the band 3 ,

The roll-up mechanism 10 consists of a roll holder 20 for a coil 12 to which the band 3 can be wound up. This coil 12 can on the shaft 21 of the roll holder 20 then locked by the above-mentioned engine 18 z. B. via a transmission 22 is driven.

A roll with tape 3 gets on the roll holder 11 placed, and then the tape 3 wipe the leadership roles 13 and 14 passed, several times over the drums 6 and 7 as a whole, over and under the winds 15 of the cooling part 8th and finally through the calender 9 up to the coil 12 of the reeling mechanism.

The heating of the drums 6 and 7 is on, the engine 18 is pressed, and the nozzles 4 and 5 are fed with the material for forming the two layers.

The ribbon 3 gets through the calender 9 transported and on the spool 12 rolled up the reeling mechanism.

The above-mentioned polymer solution becomes the first layer 23 in the form of a continuous strip 3 through the first nozzle 4 sprayed on, as in 5 shown in detail.

This paste is on the heated drums 6 and 7 dried.

Because the axes of these drums 6 and 7 converge, subsequent windings of the band go 3 around these drums 6 and 7 automatically to the end, where the axes are closest to each other.

By the time this is on the tape 3 sprayed material the nozzle 5 reached, it is dry. A second location 24 of the above-mentioned reflective particle material is then passed through the nozzle 5 in the form of a strip, the z. B. has the same width, on the first layer 23 sprayed.

If this material is the end of the drums 6 and 7 reached, it is dry.

The ribbon 3 with the layers 23 and 24 On top of each other is still warm, but it will be on his up and down path in the refrigerator section 8th cooled by air.

The layers 23 and 24 be through the calender 9 leveled and smoothed.

The method described above is simple and versatile.

According to a variant, the band 3 with the two layers 23 and 24 immediately behind the nozzle 5 and consequently, during the situation 24 still wet, ultrasonic vibrations are exposed.

For this purpose, the device contains, as in 8th shown a plate 25 behind the drum 6 , at the bottom of which a generator for ultrasonic vibrations 26 is appropriate.

Thanks to this ultrasound generator 26 the light-reflecting particles, e.g. B. the glass beads in position 24 , transported to the surface, so that a larger amount of these particles is at the surface and thereby the reflective properties are improved.

The nozzle 5 for spraying the second layer 24 become light-reflecting particles in a transparent base of a reservoir 27 about one in a pump 29 attached pipe 28 fed.

To prevent misunderstandings: this reservoir 27 as well as its% oh5 28 and the pump 29 are in the 1 to 7 not shown.

On the side wall of the reservoir 27 can, as in 8th also shown is a generator for generating ultrasonic vibrations 30 be attached.

Thanks to these ultrasonic vibrations the reflective particles do not settle in the resin of the transparent one Base in the reservoir but remain evenly distributed in this resin.

Also, the nozzle is 4 over a pipe 31 that a pump 32 contains, with a reservoir 33 connected. At this reservoir, a generator for generating ultrasonic vibrations can also be provided, for. To prevent the pigments from settling in the polymer solution, but this is usually not required.

The above-mentioned polymer solution and the above-mentioned resin having light-reflecting particles need not necessarily pass through a nozzle 4 or 5 be supplied. Other fluid delivery systems, e.g. B. with rollers are possible.

9 shows a vibratory roller system as an alternative to the nozzle 5 is used, but of course, such a system and the nozzle 4 replace.

The ribbon 3 is about the leadership roles 34 via a vibrating roller 35 guided, the contact to a moistening roller 36 that partially into the reservoir 37 immersed, which contains the polymer solution or the resin with light-reflecting particles. Also in this reservoir 37 can be a generator for ultrasonic vibrations 26 be provided as in 9 shown.

The width of the band 3 or the layers 23 and 24 It's easy to adjust. So can the layers 23 and 24 the entire width of the band 3 cover.

The strip with the two layers 23-24 adheres very strongly to the tape 3 and has excellent reflective and possibly also phosphorescent properties.

The ribbon 3 can be made of plastic instead of tissue.

Claims (6)

Device for applying a strip ( 23-24 ) reflective material on a tape ( 3 ), which device has two fluid delivery systems ( 4 and 5 ) means for sequentially moving a tape ( 3 ) with respect to said two fluid delivery systems ( 4 and 5 ), and heating means for heating the belt ( 3 ) after each fluid delivery system ( 4-5 ), characterized in that the heating means comprise two rotating, heated drums ( 6 and 7 ), over which the tape is to be guided and which have convergent axes, so that the tape ( 3 ) when it comes to these drums ( 6 and 7 ) is automatically advanced to the end where the axes are closest to each other, at least the second fluid delivery system ( 5 ) opposite this pair of drums ( 6 and 7 ) is located. Device according to claim 1, characterized in that it comprises at least one calender ( 9 ) for leveling and smoothing the fluid delivery systems ( 4-5 ) attached layers ( 23-24 ) and means for transporting this band ( 3 ) through this calender ( 9 ). Device according to claim 2, characterized in that the calender ( 9 ) two rolls ( 16 and 17 ) and means for driving at least one of these roles ( 16-17 ) such that one roll rotates at a higher peripheral speed than the other. Device according to claim 2 or 3, characterized in that it is located between the heating drums ( 6-7 ) and the calender ( 9 ) a cooling part ( 8th ) consisting of guiding elements ( 15 ) for the band ( 3 ), which are arranged alternately at the top and bottom. Device according to one of the preceding claims, characterized in that, according to the second fluid delivery system ( 5 ) one Device according to one of the preceding claims, characterized in that the second fluid supply system ( 5 ) a reservoir ( 27 ; 37 ), whereupon an ultrasonic vibration generator ( 26 ) is attached.