FI96629C - Methods and apparatus for applying coatings - Google Patents

Description

96629

METHOD AND APPARATUS FOR APPLYING COATINGS

The present invention relates to a method for applying coatings and to an apparatus for carrying out this method.

5

The invention relates in particular to the application of asphalt-containing roofing materials.

It is already known how to heat asphalt-containing material by means of an open flame and / or hot air to operating temperatures between 500 ° C and 800 ° C. The materials of the roof structure can easily ignite in this way and can result in a widespread fire, especially when there are gaps and openings in the roof structure for hidden spaces. The number of fires has so far been so high that in many cases insurance companies have refused to accept such coating measures.

U.S. Pat. No. 4,869,044 relates to the application of roof coverings. The known method described in this patent uses gas as a heat source. In this case, the flames are not freely directed against the roof, but are enclosed in a wagon with numerous furnaces. The trolley for roofing is also taken from the trolley 25.

It is an object of the present invention to obviate the problems presented and to provide a method and apparatus for making coatings which can be quickly and safely applied close to the structures and spaces from which fires have so often begun. Another object of the invention is to make the conditions such that they would easily lead to a controlled application of the coatings, i. limit the areas to be coated in terms of time and space so that it is also possible for the layman to apply the coatings in an acceptable manner easily and simply. It is a further object of the invention to reduce the environmental damage, especially since the application of coatings by lay people may result in the formation of strong smoke which is unhealthy to the author and possibly to other persons nearby.

These objects are achieved by a method and an apparatus according to the present invention, which method and apparatus are set out in the preamble of this description and are characterized by what is set out in the characterizing part of claim 1 and the first device claim 10, respectively.

It is important to consider the very essential air distribution of the method and apparatus of the invention. Cooling is generally not an essential and critical feature, but a type of cooling with very specific effects. According to the invention, it is essential that two fans are used, which fans have an interaction which provides an ergonomically ideal solution and not a previously known cooling and ventilation solution, which invention includes air streams directed towards each other and alternatively away from each other. Thus, the fans continuously suck the rising hot air away from the user. The air sucked in in this way then effectively cools the upper part of the device in general and its handle in particular. Thus, the handle 25 and the parts of the device close to the handle are constantly cooled to a considerable extent by means of wide openings located below the handle and in the middle of the device and adapted to pass through most of the cooling air. The cooling air then flows mainly centrally to the space between the reflector plates and the base plate of the reflector body, where strong heat is generated and the heated air currents move away from each other towards the short sides of the device, where their direction of travel is reversed and again towards each other. within the space between the infrared lamps and the safety glass, in which area the currents reach their maximum temperature and at the same time they are directed against each other and then; ltt. Although the primary function of the airflows is to cool the upper and outer parts of the device, especially the area around the handle, the secondary function is not only to transfer but also to absorb heat, the latter having 10 main functions during flow because the air is in contact with the roof covering. does not necessarily cool the heated roof covering, but instead contributes to keeping it in a liquid or semi-liquid state. The latter task is effectively accomplished by the present invention. Due to its characteristic features, an external lunar curtain is formed below and around the device, which maintains heat generation in this area. No direct cooling air flow flows between the unit and the currently heated coating area and only 20 additional air is allowed to leave this area.

Other characteristic features and advantages of the present invention are set forth in the following description and reference is made to the accompanying drawings, which show a preferred but not preferred embodiment. 25 a limited implementation example, which is partly schematically drawn.

The drawings show: Figure 1 shows a detailed perspective view of a device 30 for applying coatings according to the invention; Figure 2 shows an end view from the right side of the device of Figure 1; Fig. 3 shows a sectional view along the line III-1II in Fig. 2; and Figure 4 shows a sectional view along the line IV-IV in Figure 3.

The device shown in the drawings is generally indicated by reference numeral 1 and comprises a body 2 made of a metal and / or plastic material. The frame preferably comprises two substantially mirror-symmetrical longitudinal halves, in which the mutually abutting edges may have fastening means known per se.

5 Said halves and / or other parts are assembled with transverse bolts 3.

In the transverse plane of symmetry, the device is also approximately mirror-symmetrical. As can be seen, the device 10, which may be about twice the width and 2-3 times the length, comprises two body ends 4 and 5, which may be of the same size or at least almost the same size, in which case it is desirable to give the device minimum dimensions. or minimum weight. The body ends include a handle 6 which connects them and is provided with a push button 7 on the main circuit breaker. A recess 8 is formed in the body, which, when viewed roughly parallel, extends parallel to the handle below it. This recess is open in its transverse direction and thus the handle can be gripped easily and quickly. The handle can be partially adapted to form an integral part of the body, e.g. in the form of two uniform halves, if the body comprises two parts.

The fan 11 is mounted on the first body end, e.g. the front end 4, below an inclined top wall 9, in the wall of which a half frame and / or a filter 10 is built-in. The fan is suitably inclined on its outlet side and directed towards the center of the device. A transformer 13 provided with a rectifier, which is adapted to convert e.g. 220 V AC into 14.3 V DC, is installed between the fan 11 and the adjacent recess wall. The fan 11 can be adapted to 12 V, the rotational speed can be increased to increase the pressure, and the rotational speed 35 depends on the voltage.

The fan 16 is also mounted on another frame end, e.g.

Il i Iäti liiti i f) 91! 5 96629 to the rear end 5, below the inclined top wall 9, in which wall a half frame and / or a filter 15 is built in the same way as on the above-mentioned side. The duct inlet 17 is also mounted on the top wall near the recess 8 and below the duct inlet a contactor switch 19 is mounted near the recess wall 18. No electrical conductors are shown in the drawings and no details of the above electrical components as wiring is obvious and said components are known 10 and commercially available. obtainable.

The reflector body 20 with the upwardly projecting mounting lugs 21 is bolted 3. The lamp holders 22 of the infrared lamps 23 are mounted at the ends of the body 20 and extend along the bottom of the body below the reflector plates 24 but above the goggles 25 which protect the reflector downwards. one or more protective glasses are connected from below to the inner and upper glass holders 26, while the lower glass holder 20 is fitted to each end or narrow side of the device and connects the bottom of the protective glass to the support 28. At the same time, the latter glass holder forms feet that place the goggles and infrared lamps and thus heat generation at a distance from the support or surface to be heated.

The long sides of the device are defined downwards by air baffles 29 terminating in an upper support 30 attached to the long sides of the reflector body, while the intermediate portion 31 extends obliquely outwards and downwards to close the air vents 32 on the long sides of the goggles. The end end supports 33 are at a level below the safety glass and preferably somewhat above the level of the bottom of the supports, and are bent towards each other horizontally. In this way, the ventilation air is directed from the area outside the long sides of the safety glass to the area below the safety glass and the safety glass is cooled and at the same time kept clean of at least 6,966,229 partially splashes and other contaminants when the asphalt-containing material is heated. The air is then allowed to exit under the end supports 33.

The body of the reflector is provided in a known manner with longitudinal cooling fins 34 extending downwards from the base plate 35, in which transverse or vertical openings 36 are arranged, which according to a preferred embodiment of the invention are small in the vicinity of the ends of the body and large in the middle of the body. For example, these openings may be round and dense at the ends of the body and slit-like at the center of the body, as shown in Figure 4. In this way, the ventilation air is efficiently passed through the central and hottest parts of the device, which ventilation air 15 is forced mainly to the center of the reflector body (relative to its length) and outwards from the center towards the ends of the reflector body between the plate and the base plate. In this way, the recess 8 can be effectively cooled and the use of two fans 20 is very important, because in this way the two ends of the body can be cooled in essentially the same way and an ergonomically correct, well-balanced device can be implemented. Of course, two fans provide more efficient cooling than just one. Of course, it is also possible to use a pair of fans at each end of the body, e.g. one fan in each end area of the longitudinal sides of the body, in case extremely strong cooling is required.

Between the lower longitudinal sides of the housing or frame and the supports 30, there are preferably vertically and horizontally through holes 37, which allow these areas of the housing and the guide plates to cool down. Such holes may also be provided between the supports 30 and the body of the reflector. The end sides of the body 35 may also be provided with air conditioning, as shown in the lower right half of Figure 4. The lower glass holder 27 is suitably provided with quick-release means, which are known per se, so that the protective glass and / or lamps can be easily and quickly replaced, cleaned, etc. Of course, such quick-release means can also be used in other parts of the device.

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It has been found that such a device and a similar method for applying the coating are very advantageous, especially when the work to be performed is located in hard-to-reach areas. The risk of fire is reduced or even eliminated and the work process 10 itself is easier to control and direct in all respects. Important environmental benefits are also achieved because, for example, overheating and thus no combustion of materials takes place as easily as before, but only with carefully controlled and regulated heating.

15 A more homogeneous result is also obtained.

The invention has been made possible by some important insights, one of which is that splashes against the protective glass, which splashes somewhat despite the protective measures, and thus the fouling of the protective glass after some time disappears as a result of continuous heat release from the upper surface of the safety glass. Amorphous white flour is usually the result of this, but it’s simple! falls from the goggles.

Another realization is that the short-wave infrared radiation of wood, paper or the like alone is much weaker than, for example, asphalt-containing coating materials, which heat up and soften rapidly. Heat transfer also occurs by radiation, part of which occurs in the sight-30 wavelength range. In this way, the parts in the shade and thus the hidden cavities do not heat up. The worker can also see the parts that are illuminated / irradiated.

The application of the device shown and described is very advantageous from an ergonomic point of view. The worker can easily rotate the device sideways and forwards / backwards, as it is usually designed to automatically take the balance position when the worker holds the handle of the device. The device can also be left alone without injuring any important part or any person or damaging any object with heavily heated parts. It is also preferred that when smoke-mixed ventilation air is used, it is moved away from the worker and two long gaps between the baffles and the goggles, as well as a double fan arrangement, ensure fast and efficient removal of the used ventilation air.

10

The invention is not limited to the application examples described above and shown in the drawings.

i · 11 «H i Mil Ilta

Claims (10)

1. Methods of applying surface coatings, especially asphalt-containing roofing materials, using heat for wetting or 5-melting of overlapping layers, characterized in that infrared lamps (23) which are shielded from the surface (protected) are used as heat source ( which is cooled by fan cooling air streams from two mutually opposite halves, initially from one another directed to the back of the lamps with a more intense flow in a central area and also along the sides and finally towards each other between the lamps and the protective glass, which is later re-flared and protective air through directed air currents. Apparatus for performing the method according to claim 1, comprising a heat source (25) for welding or melting overlapping layers of a coating to be applied, in particular an asphalt-containing roofing material, characterized in that the device comprises 20 infrared lamps (25). ) as a heat source in an elongated, preferably split housing (2), both ends of which each have a fan (11 and 16, respectively) and other electrical equipment and encloses a central recess (8) which is bridged by a handle (6), preferably with pressure (7) to a main switch, and the fans are arranged to supply 2. Cooling air along the top or back of a reflector body (20) towards its center, where there are larger throughput openings (36) than in the reflector body's end areas, and that there is air control means for controlling the cooling air on the inside of the reflector body from the center towards the ends between its base plate (35) and reflector foil (24) and from the ends towards the center on the front of the lamps (23) and above the protective glass (25) and simultaneously outward to the sides around the protective glass with rewinding of the same on the coating side through directed air currents and thence onwards. environment. 3. Apparatus according to claim 2, characterized in that it comprises a metal cap and (or) plastic (96629), which is formed in two essentially mirror-symmetrical longitudinal halves, abutting one another. the edges preferably have. an engagement function known per se, and where the halves and / or other parts are joined together by transverse bolts (3). 5 Device according to claim 2 or 3, characterized in that the transverse plane of symmetry is approximately mirror symmetrical, the device being approximately twice as high as wide and 2-3 times longer than high. 10 Device according to the nigot of claims 2-4, characterized in that it comprises two housing ends (4, 5) which are the same size or nigot different, and between which are enclosed the bridging handle (6) with pressure (7). wherein said recess (8) extends approximately parallel to the handle below the said recess, which is transversely open, such that the handle is easily and quickly graspable, the handle being configured as a homogeneous portion, for example in the form of two congruent halves at two-tailed pits. 20 Device according to any of claims 2-5, characterized in that in one of the, for example the front housing end (4), one fan (9) is provided with a built-in contact guard and / or filter (10). 11), which is suitably arranged obliquely with the outlet side directed towards the center of the device with respect to the length, and that the other, for example the rear housing end (5) under an equally oblique upper side (14) with built-in contact guard and / or filter (15) is arranged the second fan (16) p in a corresponding manner. Device according to any of claims 2-6. characterized in that between one of the fans (11) and the adjacent recess wall (12) there is arranged a transformer (13) with rectifiers for transforming, for example, 220 V alternating current to 14.3 V direct current, and that the fans (11, 16 ) are intended for 12 V in and for 3Γ · to obtain a heating in and for increased pressure, where the speed becomes a function of the voltage, and / or that in the upper side there is also near the recess (8) a cable passage (17) and below the same adjacent the recess wall (18) a contactor switch (19). 8. Device according to claim 3, characterized in that the pk bolts (3) are anchored to said reflector body (20) with projecting mounting flaps (21), and that on the ends of the body (20) there are lamp holders (22) for the infrared lamps (23). ) extending along the underside of the body below said reflector sheets (24), but above the reflector body below the shielding glass (25), which is inserted into glass shelves (26, 27), of which glass shelves are provided with an inner or upper seed (26). ), against which one or more protective glass panes abut from below, while a lower glass counter (27) is defined at each end or narrow side of the device and abuts with a shank (28) against the underside of the protective glass, the latter glass coffers 15 simultaneously forming feet which distance both the protective glass and thus the IR lamps and the heat radiation from a substrate or surface to be treated. Device according to any one of claims 2-8, characterized in that the longitudinal sides of the device are limited at the bottom by air control plates (29), which with an upper leg (30) abut against and are attached to the sides of the reflector body, while an intermediate part (31) extends inclined outwards and downwards to enclose air passages (32) along the length of the protective glass, and / or that the closing end legs (33) pk 25. a level below the protective glass and preferably slightly above the level of the underside of the feet are angled horizontally towards each other in opposite directions. the ventilation air from the area outside the longitudinal sides of the protective glass to the area below the protective glass to cool and clean the latter simultaneously to at least some degree from splashes and other contaminants when heating asphalt-containing material and then to release under the end legs (33). 10. Apparatus according to any one of claims 2-9, characterized in that the reflector body in known manner has longitudinally extending 3b heat sinks (34) extending downwards from a base plate (35) in which said transverse or vertical through openings are provided. ! - IB ·? 3 ΙΪ! IH tl '' in 17 96629 (36), which are smaller in proximity to the ends of the body and larger in the center of the body, for example more round or compact at the ends of the body and slit-like in the center of the body, so as to achieve a more intensive flow through of the device. central and most heated. 5 parts with ventilation air, which are mainly forced into the central part of the reflector body with respect to the length and thence towards the ends of the reflector body between the base plate and the film with cooling of these parts and the device in general and also with an intense cooling of the recess (8) and / or that between the lower longitudinal sides of the hood or housing and the joints (30) are preferably in both vertical and horizontal joints (37) which allow cooling of these joints and the guide plates, and / or that there are such slots ( 30) and the reflector body, and / or that the end faces of the housing are ventilable, and / or that the lower glass shelves 15 (27) are provided with fastening means of a known per se, such that the protective glass and / or lamps can be easily and quickly replaced. , cleaned etc.