DE1273478B - Method and machine for the production of a non-woven, lattice-like thread structure, in particular for reinforcing flat composite materials - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

D04h

German class: 8 a.m. - 8

Number: 1 273 478

File number: P 12 73 478.0-26 (M 43523)

Filing date: November 27, 1959

Opening day: July 25, 1968

The invention relates to the production of lattice-like thread structures, such as those used to reinforce flat composite materials, e.g. B. on the basis of plastics, especially polyester resins, are necessary. The production of such thread structures in the conventional weaving process is known, however only possible with a great deal of technical effort and correspondingly high manufacturing costs.

It is also already known to dispense with the lattice-like thread structures necessary for reinforcement on the conventional weaving process as so-called "scrim" to produce at least two intersecting sets of threads placed on top of one another and at the cross-hairs be firmly connected to each other. The shape of the mesh can be selected within wide limits (See U.S. Patents 2,797,728 and 2,772,993). In particular, one already knows scrim, whose meshes are arranged in a diamond shape in the longitudinal direction of the material web and the their two marginal edges have a fixed marginal edge through appropriate threading. In Connection with the scrim just mentioned (US Pat. No. 2,772,993) has also become known, the scrim extending in the transverse direction immediately after its manufacture to be laid between two webs of material and to be attached there. This known measure served the invention by placing the transverse threads between two parallel sets of threads can run in existing material webs.

The invention is essentially based on the prior art just mentioned (US Pat. No. 2,772,993): the known scrim is disadvantageous in that, due to its diamond-like mesh shape, it has an unsatisfactory dimensional stability despite the reinforced edge. To improve the dimensional stability of the scrim, the invention is based on the technical problem of stabilizing the laying of the transverse threads, which is effected in a manner known per se by a circulation process, with regard to the laid shape during the laying process. The technical problem of stabilizing the shape of transverse threads has already become known in textile technology in the production of non-woven decorative ribbons (cf. French patent 747 341), but the production of net-like thread layers according to the invention requires another solution, which consists in the longitudinal thread sheets having two outer layers Edge threads are fed and the revolving movement of the transverse threads around the two edge threads is carried out parallel to the method and machine for producing a
non-woven lattice-like scrim,
especially for reinforcing flat
Composite materials

Applicant:

Moulinage et Retorderie de Chavanoz,
ίο Chavanoz, Isere (France)

Representative:
Dr. E. Wiegand

and Dipl.-Ing. W. Niemann, patent attorneys,
8000 Munich 15, Nussbaumstr. 10

Named as inventor:

Emile Butin, Lyon (France)
20th

Claimed priority:

France of December 1, 1958 (38 879)

The longitudinal direction of the scrim can be moved at the appropriate feed rate. This task solution also enables the advantage that the two edge threads in the thread lay a tensile load Form receiving edge reinforcement.

To carry out the manufacturing process according to the invention, a machine is used their structure is essentially characterized by the technical means customary in the field is. As far as this machine is placed under patent protection, this is only valid in connection with the invention Production method.

The invention is explained in more detail below with reference to the drawing, for example.

F i g. Fig. 1 is a schematic plan view of a portion of the nonwoven scrim scrim;

F i g. Figure 2 is a section on line 2-2 of Figure 1;

F i g. Figure 3 is a section on line 3-3 of Figure 1;

F i g. 4 and 5 schematically show a machine for production in a side view and a plan view, respectively of the scrim;

F i g. Figure 6 is a section on line 6-6 of Figure 4;

809 587/371

F i g. 7 is a partial section along line 7-7 of FIG. 4 on a greatly enlarged scale.

The scrim to be produced according to the invention consists essentially of three sets of threads 2, 3 and 4. The threads of the outer sheets 2 and 3 are arranged in the longitudinal direction parallel to one another in such a way that that the lying on one side of the transverse thread sheet 4 longitudinal threads in the spaces between the longitudinal threads lying on the other side of the transverse thread sheet 4 fall, the threads the group 4 run at right angles to the threads of the outer groups 2 and 3. Those three Flocks of filaments can be identical or different, and they can be of any one Material, e.g. B. made of glass.

The threads in the three groups do not cross each other; their connection is made by gluing with Achieved with the help of a binder, the type of which depends on the type of threads.

A scrim formed in this way can be used in particular in the production of layered Articles based on polyester resins are used.

The scrim can be operated at a very high speed with the aid of the FIG. 4 ag to 7 reproduced machine can be produced. The machine has essentially two warp beams 5 and 6, which supply the threads for the two outer groups 2 and 3. These threads that go through combs 7 and 8, run sliding over two parallel guide rods 9 and 10, which in a very are arranged close to each other.

The coulter 4 consisting of the transverse threads is obtained from a plurality of spools 12 carried by a ring 13 supported by spokes 14 is connected to a hollow shaft 15, which is given a continuous rotary movement.

The threads coming from the bobbins 12 each pass through those carried by the rotatable ring 13 Thread guides 16 through and run around two short strip-shaped spacers 17 which are parallel to each other in the longitudinal direction of the machine, d. H. in the direction of movement of the longitudinal thread sheets 2 and 3 are arranged. Each of these spacers 17 has a groove 18 (FIG. 7) in which an edge thread 19 is running, which is drawn into the machine. The two intended edge threads 19 come of two coils (not shown) and progressively pass through the hollow shaft 15 and around Deflection rollers 21 in the guide grooves 18.

The edge threads 19 are continuously moved forward in the direction of arrows 22 (FIGS. 4 and 5), and the cross threads run over the spacers !? and the edge threads 19, as shown in FIGS. 5 and 7 can be seen. The edge threads take the transverse threads with them, which in this way act as a shape-stabilizing thread layer between the two longitudinal thread sheets 2 and 3 in the section between the guide rods 9 and 10 are continuously introduced.

The three thread sheets 2, 3 and 4, which are then in their final arrangement, then run progressing over a guide roller 23 and a cylinder 24, which is with its lower part rotates in a tub 25, which contains a liquid binder, which the threads of the flocks 2,3 and 4 can glue together. The three shares 2, 3 and 4 finally run over guide rollers 26 and on a heating drum 28, which ensures the drying of the binder. The resulting The scrim is finally wound onto a take-up cylinder 29.

In this way, a grid-like scrim is obtained, which is several thousand meters per day produced by means of a particularly simple machine, both in the form of ribbons and large sheets can be.

Claims (5)

Patent claims: 1. Process for the production of a grid-like, non-woven and reinforced edge edges having Scrim as a reinforcement insert for flat composite materials, with between two longitudinal thread bundles one cross thread bundle with one perpendicular to the longitudinal thread plane extending orbital movement is inserted and after application of a binding agent the longitudinal and transverse threads are firmly connected to one another using heat, characterized in that two parallel outer edge threads (19) are fed to the longitudinal thread sheets, which secure the position and shape of the transverse threads during the insertion process. 2. Machine for performing the method according to claim 1, characterized by two Sets of warp beams (5,9) and guides (6, 10) for the continuous feeding of two Outer layers (2,3) of longitudinal threads, a device (21,21) for the continuous supply of two edge threads (19) via spacers (17) between the longitudinal thread outer layers (2,3) and a circumferential ring (13), which carries transverse thread bobbins (12), for the continuous wrapping of the edge threads (19), with an application device (24, 25) for a binding agent the longitudinal thread outer layers (2,3) combined via a guide roller (23) and those from the Transverse threads and the edge thread (19) formed inner layer (4) is provided. 3. Machine according to claim 2, characterized in that the spacers (17) from exist with a guide groove (18) for the edge threads (19) provided strips. 4. Machine according to claim 2 or 3, characterized in that the ring (13) has a hollow axis (15) through which the edge threads (19) can be guided. 5. Machine according to claim 2 or 4, characterized in that the spacers by endless belts or rotatable thread parts, over whose threads the transverse threads are guided are formed. Considered publications: German Patent Specifications Nos. 913 048, 933 083; German Auslegeschrift No. 1040 494; British Patent Nos. 749 914, 762 921; U.S. Patent No. 2,772,993; French patent specification No. 747 341. Older patents considered: German Patent No. 1 127 860. 1 sheet of drawings 809 587/371 7.68 © Bundesdruckerei Berlin