DD269838A1 - DEVICE FOR CONNECTING TRACKS - Google Patents

Abstract

Device for connecting web ends in the continuous processing gear on web-processing machines, for example in the coating of textile surfaces, characterized by two mutually pivotable driven and rolling over translational elements, wherein the compound of the webs in the region of the translational elements is made. Fig. 1

Description

embodiment

Fig. 1: shows a side view with the web located in the ready position and the running web. Fig. 2: shows a side view of the working position when connecting the webs.

A web 1, consisting of a canvas-bonded viscose fiber fabric with a basis weight of 150 g / m ² and a width of 1.5 m, runs from a large docks 2 over an endless, rotatable about the midpoint blanket 3, which two rotatable rollers 4,5 is tensioned with a force of 1000 N and has a thickness of 15 mm and a width of 1.7 m, to a feeder at a speed of 60 m / min too.

The beginning of a second web 6 is attached to a second blanket 7, which corresponds in its execution the blanket 3, with a retainer 8, which consists of a steel rail, which is printed with air pressure to the rubber band attached.

The retainer 8 can be lifted by attached to both sides pneumatic cylinder, which are operated by hand or by photocells 9, from the blanket.

On the second web 6, which is deducted from the large dowel 13 provided, is at the level of the center of the roller 5, a commercial adhesive on both sides self-adhesive tape 10, which consists of a textile basis, which is coated on both sides with a Polyacrylathaftklebestoff, before use with a siliconized paper is covered, attached. A second wide self-adhesive tape 11 is mounted at a distance of 0.8 m from the center of the roller 5.

The end of the web 1 is detected by the photocell 9, which is mounted at a distance of 1 m from the center of the roller 5, whereupon the blanket 7 is rotated so that the roller 5 is pressed with a line pressure of 100 N / cm against the blanket becomes.

At the same time the retainer 8 is raised pneumatically, so that the web 6 of the large dowel 13 is taken from web 1 and the self-adhesive strip 10, the webs 1 and 6 glued.

After 0.8 m common run of both webs adheres the self-adhesive strip 11, the end of the web 1, so that the still free-hanging part of the web 1 is only 0.2 m and in the further course of the coating does not bother. The blanket 6 pivots back to its original position and the endless joining of both webs is completed.

For the next operation of the endless connection, a new large dowel 2 can be positioned and the web 1 fixed by the retainer 8 and provided with the self-adhesive tapes 10 and 11, wherein behind the web at the point where self-adhesive tape 11 is to be attached, a counter-holder 12th is installed for fixing the adhesive tape.

The advantage of the device shown is the low level of equipment complexity with the greatest possible elimination of manual labor. The ^u connection of the web ends with this device is very simple.

Claims (1)

Device for automatically connecting web ends within the processing sequence, eg. As the coating, using signal technology and switching technology for switching on working elements of the device at the beginning and at the termination of the connection process of a running from a large dado web with a web, which is switched by a standing in Beraitschaft large docks, characterized in that two on two rollers (4,5) running driven endless, flexible and mutually pivotable translation elements, preferably blankets (3,7), with on the upper rollers (5) arranged releasable retainers (8) are present. For this 1 page drawings field of use The invention relates to a device for connecting web ends in the continuous processing gear on warbahnverarl leading machines, z. As in the field of coating textlien fabrics, where without interrupting the machine! continuously working processes are carried out. Characteristic of the known state of the art The general state of the art involves stitching the end of the running web with the beginning of a new web inserted into the working process in order to continuously apply coating materials, extrusion foils or the like to a substrate. This work is physically demanding, since all operations must be carried out very quickly and precisely, auc'i this work is not entirely safe, because it must be approached very close to moving parts. It is common to join textile webs of fabrics together to ensure a continuous operation. This is done by known methods by sewing or by gluing with adhesive or contact adhesives (DE 2352038, CH 547220). The production of a seam requires additional time. In coating processes, the application of the coating must be interrupted in such a case. Thus, a continuous operation is no longer guaranteed, or it will require additional memory. According to another method, the fabric ends are welded by means of a film in the high-frequency process (DE 2352038). For this the producer needs a very complex welding technique. Another way of connecting webs is to insert a thermoplastic material and then pre-pressing the fabric ends and in the use of removable heat-resistant films (DE OS 2352038). However, this results in a very strong hardening, which can lead to wrinkling at a later warming. In DE OS 2601967 a method is described in which by interposing strips of fabric between the ends of the textile webs and dissolving or swelling the strips using a heatable press in a short time a heat-resistant flexible connection is made. Disadvantages in this case are the material and Arbeitsplat .belastung by the solvent and the waiting time until evaporation of the swelling agent as additional Zeitl l Furthermore, were previously for di: cutting the fabric webs consuming separation or cutting devices necessary (GHPS 1361496). Object of the invention By the invention high plant engineering effort is to be replaced by simple ^ echanisch working device elements as well as the attention of the work force demanding work can be simplified. Essence of the invention The invention has as its object to connect the end of a running from a dock web with the beginning of a new, also located on a dock web and to develop a device. According to the invention we have achieved the object by a device consisting of two mutually pivotable and running over two rollers endless pliant translation elements, preferably blankets with drives. The upper rollers, over which the respective blanket runs, are associated with releasable retaining means which hold the beginning of the web, which is connected to the running web until the time at which the connection is completed. In the working position in which the two translational elements are pivoted toward one another, their relative speed during continuous translation is zero, so that no tangential movement occurs between the connecting webs Initially, the new material web was placed on the free transporting element, clamped by the '-stop holder and provided with self-adhesive tapes acting on both sides.