DE2837548A1 - Fabric-film bonding - using heated blade to cut stacks for layers to be welded at edges - Google Patents

Abstract

To bond overlapping fabric or film sections, such as for the mfr. of kites, at least two flat and overlaid fabric sections, or film layers are cut together by a hot blade in a straight line while laid on a supporting surface. This gives two double-layered or multi-layered sections, so that the layers in each stacked section can be welded together. At least one layer is hinged upwards and along the welding line. The process gives a simple method to give a clean join to material sections, so that they are formed into the kite components, without distortion.

Description

description

The invention relates to a method of joining and mutual Joining of fabric or foil blanks, in particular for the production of coverings for kite decoration models or other model sails.

It is known to sew or sew together fabric or foil blanks to be glued or welded with mutual overlap. This working method are relatively cumbersome because they require that the Blanks first produced separately, then joined or overlapped one on top of the other and finally get connected. On the other hand, it works on a scaled down Model of an object composed of several lengths of fabric, for example a kite model, annoying and unnatural that the seams of the model too no matter how carefully they work, they are immeasurably large.

In many cases, therefore, such models are not made from individual lengths of fabric composed, but made of a coherent web of fabric, whereby individual areas of the same are merely colored differently.

The invention is based on the object for the applications described To propose a working method that is simple, efficient and clean butt joints which results in fabric or foil blanks.

This object is achieved according to the invention in that at least two webs of fabric or foils lying flat on top of one another on a base a cut made in a straight line by means of a hot knife are, so that two double or multi-layer sub-stacks arise, with the Layers of a partial stack are welded together along the cut edge and that then at least one layer of a partial stack that has been created in this way is reversed the welding line is unfolded.

The invention is in the manufacture of sails for decorative kite models tried, whose special attraction lies in the fact that the same made of polyester yarns made of strong colored canvas is used, as with the original kites. However, other fabrics or, in particular, films may also be suitable, provided that they are thermoplastic that by the heating and the pressure of the heating cut a fusion occurs at the cut edges and the material at this fusion or weld remains so elastic, as in the case of the aforementioned sailcloth, that it does not break through the 1800 bend.

Of course, the welded connections cannot be subjected to a large tensile load endure. However, this is the case with decorative models and many other applications also not necessary at all. Rather, what matters is that with such a simple one Different colored tools like a heated knife that is guided along a ruler Pieces can be put together in quick succession so that they are clean and without Overlap and the result is a flat path.

An advantage of the method of the invention is that it can also be carried out with three or more blanks lying on top of one another, so that then all these blanks are connected along the weld line. To this In this way, it is easy to pull through the composite web of fabric or film or attach a hemstitch.

If the strength requirements for the welded joint are higher, or only for decorative reasons, in a further development of the invention, the coherent blanks along the welding line by means of a zigzag seam can also be sewn. In this case, the compound according to the invention is effective a significant simplification and acceleration of work, since the parts are already precise are joined to one another and the clearly visible straight welding line guides the seam simplified.

If the seam is only used for decoration, as in the models mentioned, it can also be represented by a printed line pattern, which is in particular a true-to-scale Replacing a reduction in the size of real sail seams. The pressure stamp, preferably a stamp roller, can also be heated so that the imprint is in the surface leaves a recess in the film or fabric in which a color adheres.

Embodiments of the invention are described below with reference to the drawing explained in more detail. In detail, FIGS. 1 to 4 show schematic enlarged cross-sectional representations of four consecutive process steps when joining two tissue sections, 5 and 6 similar cross-sectional representations of the production of a hemstitch, 7 and 8 are similar cross-sectional views of four interconnected Foil blanks, FIG. 9 a plan view of two additionally sewn together And FIG. 10 shows a top view of part of a kite decoration model.

In the example shown in Figures 1 to 4, two Blanks 1 and 2 of a canvas made from polyester yarns with a Weight per unit area of about 165 g / m2 laid flat on top of one another on a base 3.

Then a ruler 4 is placed over it and along it by means a heated knife 5 made a cut, which is a partial stack of the stack 6 separates. As a result of the pressure and the heating during the cutting process are now the layers or blanks 1 and 2 of the two partial stacks at the cut edges welded together, which is temporarily plastic through a dark depiction material zones that have become is shown. The next step is now the upper one Blank 1 of the left partial stack folded over to the right until it is shown in FIG. 4 in one level with the other blank 2 comes to rest. The sweat zone works like a hinge due to the extraordinary toughness of the material used.

Depending on the circumstances, the right partial stack 6 can be narrower Waste be striped or kept wider and by folding down the top blank how the left sub-stack can still be used.

Figures 5 and 6 show the production of a hemstitch like him at the front edge of the kite sail according to Fig.

10 is provided for inserting the wing spar # n. After that, a Blank 7 folded and a blank 8 placed on top lays. After this Section results in the stack shown in FIG. 5, the upper blank 8 is then folded around.

Similarly, according to FIGS. 7 and 8 with two folded blanks, one folded and two unfolded or four unfolded blanks proceeded will. In any case, after the cut, four layers are attached to each other, one of which optionally one or more can be folded down.

Fig. 9 shows in plan view how the blanks 1 and 2 by means a zigzag seam 9 can also be connected to one another. Such Seam or a color imprint imitating this is on the welding lines of the kite model 10 provided according to FIG.

This kite decoration model represents a scaled down Kite and has a wingspan of about 120 cm. Insert two wing spars 10 in a hemstitch 11 of the sail widening towards the middle, while a longitudinal spar 12 penetrates a downwardly protruding passage of the sail. The spars 10 and 12 are connected to one another at the tip of the kite by means of a gusset plate 13 and braced to one another via a mast 14 and a support frame. The support frame is located under the sail and is therefore not visible in the figure. as well the tensions are omitted for the sake of clarity.

The sail is made up of a total of twelve longitudinal panels 15 and the hemstitching 11 and the aforementioned passage, the tracks generally being different Have colors. Despite the use of the sturdy original sailcloth, the inventive The connection of the individual strips and hems in the model is true to scale Reduction of the connecting seams succeeded, those of the large flying kite are strong and tear-resistant.

Claims (6)

Name: Method of joining and connecting one another of fabric or foil blanks Patent claims 1. Method for joining and mutual connection of fabric or foil blanks, in particular for Production of coverings for kite decoration models or other model sails, characterized in that at least two webs of fabric lying flat on top of one another (1, 2; 7, 8) or foils on a base by means of a hot knife (5) in a straight line - cut are separated together so that two double or multilayer partial stacks (6) arise, whereby-i the layers of a partial stack are welded together along the cut edge, and that then at least a layer (1; 8) of a partial stack thus created unfolded around the welding line will. 2. The method according to claim 1, characterized in that then the coherent cuts along the welding line by means of a zigzag seam (9) are also sewn together. 3. The method according to claim 1, characterized in that then the coherent blanks along the weld line with a line pattern, in particular a zigzag seam imitation. 4. The method according to claim 1, characterized in that the used Knife is electrically heated. 5. The method according to claim 1, characterized in that one off Canvas made from polyester yarn is used. 6. The method according to claim 5, characterized in that the basis weight of the canvas used is around 165 g / m2.