DE7815635U1 - DEVICE FOR PRODUCING A COMPOSITE RAND - Google Patents

Description

- 3 patent attorneys

DIpI.-Ing. E. Erier
DIpI.-Ing. K. Schis ..- JnKe
8 Munich 4ΰ, fc: lisaüethst, -aBe34

Note: Societe Industrielle et FinancieYe Ie Profil

Munich, March 27, 1979 File 9879 II / er

Device for producing a composite strand

The innovation relates to a device for producing a composite strand, consisting of a metal profile and at least one extruded plastic extending over a region of the outer surface of the metal profile, with a Rinsing area, an adhesive application area, a spray head and a polymerization area.

Such composite strands, which are present as profile strips, are generally found as semi-finished products for the electrical and automotive industries, for furniture manufacturers and for other branches of industry Use as decorative strips and as edge and bumper protection.

In any case, the metal profile and the plastic bead must be very firmly connected to one another, and must not be solve without further ado. So far, the production of such profile

perform problematically because it is very difficult to connect or glue plastic to metal.

A method for producing well-adhering polyurethane coatings on metallic supports is already state of the art known, after which the metallic carrier is brought to an elevated temperature before entering the extrusion head. Through this should be the adhesion results between the metal carrier and improve the plastic overlay. However, this procedure is Time-consuming and costly, since the metal carrier must first be passed through a street of flames.

The state of the art also includes a method of production plastic-coated metal pipes, in which on the metal pipe immediately before the plastic coating is applied a reaction adhesive is applied. Here the adhesion results depend on the intensity of the application of the reaction adhesive.

In contrast, the object of the present innovation is to create a device of the type mentioned above, which creates a very durable adhesive bond between the plastic bead and the associated surface area of the metal profile guaranteed.

This object is achieved according to the invention in that a drying area between the rinsing area and the adhesive application area and between the adhesive application area and the spray head, an evaporation area for evaporating the applied material Adhesive film contained solvent are arranged. This has the advantage that a very durable connection between the metal profile and the plastic profile is established. Since that in the applied adhesive-! If the solvent contained in the film is evaporated, it has sufficient adhesive force to hold the plastic during the joint Advance of the profile and the extruded bead to the polymerization area The subsequent joint

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Heating causes the adhesive to polymerize and thus an intimate connection between the adhesive and the Metal.

The device according to the invention therefore allows composite profile strips very safe without any loss of plastic Manufacture way. The production is advantageously carried out continuously.

Further features of the innovation emerge from the subclaims.

The innovation is described in more detail below with reference to an embodiment shown in the drawing. In the Drawing show:

Fig. 1 is a perspective view of the device for the production of composite profiles 1 afford after cfer Innovation;

2 shows a perspective view of the washing area traversed by the profile;

3 shows a section through the drying area traversed by the cleaned profile;

4 shows a vertical section through the adhesive application area;

4a shows an end view, with parts broken away, of a rotatable guide of the profile;

Fig. 5 is a perspective view of the evaporation area;

6 shows a perspective view of the extrusion head applying the plastic bead to the profile ;

Fig. 7 is a perspective view of the polymerization area.

1 shows schematically the sequence of the individual work areas of a production device for producing a composite strip consisting of a metal profile with a predetermined cross section and at least one plastic bead in a continuous process. Serving as a starting material metal profile is made of band material in the roll forming process for a later purpose en ⁺ - speaking profile is reshaped.

The semi-finished product profile 1 coming from the profile rolling mill becomes polished and then runs into a rinsing area 2, in which it is sprayed with a solution of water and lye from all particles are cleaned and freed that may have been deposited in the course of the previous processing stages to have. This cleaning takes place in the hot process, whereby the rinsing solution is heated to a temperature of approx. 80 C. and with a throughput of approx. 8 m / H under a pressure of 2 bar.

This rinsing area 2 is immediately followed by a drying area 3, in which the profile 1 is coated on its entire circumference by an air blower and completely dried so that any traces of moisture disappear.

On the surface area of the profile to be covered with a bead, an extremely thin area in an adhesive application area 4 becomes Adhesive film applied. The profile 1 runs in a precision-guided manner into this adhesive application area and runs into it Coating member 5, which applies a polymerizable adhesive in a thin layer of about 1 / U thickness, preferably a urethane-based adhesive.

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The dimensions of the coating member 5 are chosen so that the application is extremely precise and the adhesive film on in no case on the metal surface areas to be left free transgresses. The amount of adhesive applied thinly to the profile by the coating element 5 is then added in a station 6 in which the solvent contained in the applied adhesive is reduced by heat treatment, e.g. by from heat generated by electrical resistances.

For this purpose, profile 1 runs through a channel that is heated to a control temperature of approx. 165 ° C. temperature as well as the length of this channel, which is designed as a drainage karrimer, is chosen so that all of it is contained in the adhesive Solvent evaporates and only the actual adhesive remains on the profile.

This is then immediately fed to a spray head 7, which has a surface area coated with the adhesive Plastic bead settles in a certain shape. The one from his solvent The released adhesive has sufficient adhesive strength to essentially adhere the profile 1 with the bead 8 to bind and to take it with you without further ado via the subsequent common feed path.

The thus-coated profile is then fed to a polymerization zone 9 in which it undergoes heating to about 22O ⁰ C, so that a perfect composite obtained by polymerization of the adhesive film between the plastic bead and the metal profile.

The finished composite strip is then stored as a ready-to-use semi-finished product after appropriate cooling. The received Not only does the product look good, it is also resistant to impacts and others that tear off the bead from the profile Very resistant to influences.

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The metal profile can of course have a wide variety of shapes to have. It can have a single central bead, as shown in the drawings, or depending on the intended use pick up several laterally running plastic beads.

This composite profile strip is preferably produced in a continuous process in a device, the rinsing area of which is a closed chamber 2 with a lock 11 or 12 at the input and output (Fig. 2). Inside this chamber are at least three spray names 13, 14 and 15 im arranged at the same distance from one another and directed to the central region of the chamber traversed by the profile 1. These Spray arms are fed from a common supply line 16 via j connecting pipes 17, 18 and 19 at the same time. Two of the Discharge lines 20 and 22 going out from the chamber floor ensure a continuous drainage corresponding to the flushing process.

In the interior of the chamber 2 as well as along the entire manufacturing device, the profile 1 overflows at certain intervals Guide posts 24, the head 25 of which is shaped according to the profile 1.

The profile 1 | passes out of the outlet lock 12 of the chamber 2 through the inlet opening of the drying section 3 is in a \ - by a housing 26 extending, tubular chamber 28; with, for example, a rectangular cross-section. The direction of advance of the profile is indicated in FIGS. 1 to 3 by the arrows f. On both sides of the tubular chamber 28, ie above and below the same, two holding arms 30 and 32 are arranged, which are adjustable with respect to the chamber and each include a row of hot air nozzles 34 and 36, which are heated via an electrical resistor. The two ; Rows of nozzles 34 and 36, all of which are directed obliquely towards the central region of the chamber 28 or towards the profile 1, are supplied with air via two turbines 39. The depth of penetration of the nozzles into the chamber 28 can be regulated by adjusting the support arms 30 and 32 accordingly.

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The number and the heating power of the nozzles can easily be selected to ensure complete drying of the profile is.

The completely dry profile, freed of any impurities, now reaches the adhesive application area 4 (Fig. 4). The profile runs here over at least one guide support 24a, the support head of which is adapted to the inner shape of the profile is. This guide support 24a is firmly seated on a carrier 38, which is in a very precisely defined position, i.e. with a certain Distance to an adhesive container 40 is arranged.

At its upper end, the adhesive container 40 is equipped with a metering device 42 which is not shown Compressed air source is connected. In the bottom of the container 40, an outlet opening 44 is provided, which they vice versa benden, downwardly pointing nozzle 46 opens. A sleeve 48 is seated in this connecting piece 46 and has two seals 50 is completely sealed so that no adhesive can leak between the nozzle and the sleeve.

A cap 51 is screwed onto the free end of the sleeve 48, in which a central rectangular hole is formed, in which a felt or wick 52 forming the stroking member 5 is seated. This wick 52 extends on the one hand into the in the The adhesive contained in the sleeve and, on the other hand, protrudes from the sleeve until it rests on the profile 1 running over the guide 24a out. The position of the wick 52 can be adjusted so precisely that

that he only brushes the metal profile 1 and only applies an extremely thin adhesive film with a thickness of ^B1 approx. 1 / U on this.

In the embodiment shown in Fig. 4, the profile runs over a fixed guide 24a, the felt or Wick 52 the film-like adhesive on the central area of the

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Profile surface applies, so that on this central area a plastic bead 8 can be applied.

The innovation, however, is not limited to rounding strips with a central bead, but also includes strips one or more lateral beads, which can in particular run along their bent flank surfaces. In In this case, instead of the fixed guide 24a, two guides 54 (FIG. 4a) are used, which like the guide 24a their support head are shaped like the profile 1.

These guides 54 are firmly connected to a ring 56 which is rotatably supported in an annular clamping device 58 and via an adjusting screw 59 in its respective angular positions is determinable. The two clamping devices 58 are fixed on the carrier 38 and thus at a precisely defined distance arranged to the adhesive container 40.

By changing the angular position of the ring 54 can change the orientation of the profile 1 and thus turn one or the other side flank of the profile towards the felt 52. The thin one The thickness of the material and the metal of the profile easily allow momentary rotation during its passage through the application station.

Regardless of the area of its outer surface on which the adhesive was applied, the profile 1 is always fed in the same way to the evaporation area 6 (FIG. 6). This area has a chamber 60, the inlet opening of which is connected to a suction device 62. Indfer top cover this chamber 60 the heating resistors 64 are fitted, which heat the Kammerinnre up to 165 ⁰ C, to ensure that the entire evaporates in the adhesive applicator solvent contained. The evaporated solvent is sucked off immediately via the suction device 62. Via a so-called cross spray head

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is now on the solvent-free adhesive film of the profile 1 deposited an extruded plastic bead.

The plastic bead 8, which is made from a plastomer .einem elastomer or a plasto-elastomer is extruded, is continuous perpendicular or at right angles to the feed direction of the profile 1 abandoned on its coated with adhesive surface area.

The bead 8 is carried along by the profile 1 and remains adhered to it, since the adhesive strength of the adhesive for the subsequent, short feed distance is sufficient. The unpainted Surface areas of the profile 1 remain even without a plastic covering, so that the composite strip is practically already shows its final appearance.

The strip only gains its resistance to earth after it Has passed through the polymerization zone 9 (FIG. 7). This area has a table 70 on which guides are arranged are, as well as a tubular frame 72, the induction circuit of a high frequency generator, not shown forms, to which the frame is connected via connecting lugs 76 is.

The pipelines forming the frame 72 are also included a coolant source via a line 75 and connected to a coolant suction device via the line 77. The frame 72 is preferably accommodated in a housing (not shown) which, together with the table 70, is a forms a closed chamber, which is heated by the induction circuit of the high-frequency generator.

The chamber is heated to high temperatures, up to about 220 C, so that the adhesive film between the profile 1 and the bead 8 polymerized and creates an intimate connection between these two components of the bar.

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The profile strip is then cooled, preferably by moving it over a distance of 5 - 7 m over cold water lines leads so that it cools completely.

The profile strip then lies as a ready-to-use semi-finished product and can be easily stored until it is used. Since the connection between the plastic bead and the Metal is extremely strong, has the composite profile strip According to the innovation, high resistance to impacts and other harmful influences.

Patent attorneys

Dipl.-Ing. E. Eder

Dlpl.-Ing. K. Schiac ^ '-. A

8MQnchen40, Elisauethstrasse34

Claims (6)

Ii ·· ·! ·· Il 4 · · ■ I I · I > Ill > · · I I ι Il Il I II Patent attorney Dlpl.-lng. E. Eder Dlpl.-lng. K. Schieschks β Minchen 40, ti ₄ i.-jc.tijtraßo34 Note: Soc. Ind. Et Financiere LE PROFIL Munich, June 6, 1979 File 9879 Il / er Device for producing a composite strand Protection claims Device for producing a composite strand, consisting of a metal profile and at least one extending over a Area of the outer surface of the metal 1 profile extending, extruded plastic, with a rinsing area, an adhesive application area, an injection head and a polymerization area, characterized in that between the Rinsing area (2) and the adhesive application area (4) Dry area (3) and between the adhesive application area (4) and the spray head (7) an evaporation area (6) for evaporating the contained in the applied adhesive film Solvent are arranged, and that a number of fixed guides (24) for the metal profile (1) in the device arranged and on both sides of the adhesive application area (4) at least two pivotable guides (54) which can be moved about a hori zontal axis are provided. I · 1 ■ I I la I t · ι 2. Apparatus according to claim 1, characterized in that the adhesive application area (4) has a coating element (5) in Has the shape of a wick (52), the width of which corresponds to the surface area of the profile to be covered with the plastic bead and which is in an adhesive container (40) extends into it and can be impregnated with an adhesive solution is. 3. Apparatus according to claim 2, characterized in that the adhesive container (40) with a pressure-regulated metering device is equipped and extends at its lower end into a sleeve (48) in which the as Stretcher trained wick (52) extends into it. 4. Device according to one of the preceding claims, characterized in that the SpUlbereich (2) is closed Chamber, each with a lock (11, 12) at the inlet and outlet end, which longitudinally Includes spray arms (13, 14, 15). 5. Apparatus according to claim 1, characterized in that the drying area (3) has a number of hot air atomizer nozzles (34, 36). 6. The device according to claim 1, characterized in that the polymerization area (9) has a tubular, of one Has cooling medium flowed through frame (72). Patent attorneys DIpI.-ing. E. Eder Dipl.-Ing. K. Scfcleschke 8 Mlnchea 40, EUsabethstrasse 34