DE6945549U - DEVICE FOR CONNECTING TWO TRUNKS MADE OF THERMOPLASTIC PLASTIC. - Google Patents

Description

. FR. THALMANN

ττ «, -. π *. ™ Nahrungsmittel ⁷⁸ FKEIBURG I. BR.

I> __-_ right. H. SCHMITT _KA hlst _EA s _SS » PATENT LAWYERS phone 32199

Michael Kurylec, Rheinfelden (Switzerland), Sallenens tr. 74

File T 69 Th / W / Bi

Device for connecting two sheets of thermoplastic material

The innovation concerns a device for mutual, continuous joining det adjoining edge zones of two webs of thermoplastic material, with for Surface heating of the plastic sheets to be connected Hot air is used.

It is known to connect webs made of thermoplastic material to one another by using hot air. Be there the edge zones to be connected of the two plastic webs are initially placed on top of one another in an overlapping manner, whereupon at least one Treated the two longitudinal joints created in this way with hot air and then filled them with an additional wire will. However, this method is cumbersome and also costly, since it requires a special filler wire from constantly pressed onto a worker immediately after the application of hot air must become. In addition, the connection cross-sections are very small and as a result, the two tracks are only allowed exposed to very low tensile stresses.

The task of the innovation is to report these disadvantages and an easy to use, inexpensive device for connecting to create two sheets of thermoplastic material.

The solution to the problem posed consists in the device described at the beginning in that a guide element for the to be connected edge zones of the plastic webs is available, which at least two practically paralMe, according to different Seldom has open guide slots, a nozzle that can be acted upon by hot air and a pressing device which on the edge zones that continuously emerge from the guide organ in the event of a relative movement between the latter and of the device, first pass the PUhrungsorgan, then the hot air nozzle and finally the Anpreßvordichtung. This device has a simple structure and is easy to use.

The device is shown, for example, with its details essential to the invention in the drawing. It shows: 1 shows a simplified perspective view of a device

for the continuous connection of two plastic sheets, Fig. 2 is a rear view of the device in the direction of the arrow

II seen in Fig. 1,

Flg. 3 shows a longitudinal section of the device according to FIGS. 1 and 2, 4 shows a construction variant in a perspective view

and FIG. 5 shows a cross section of the device according to FIG. 4.

The ones in the drawing in a simplified form, i.e. waived Device shown in insignificant details has a frame 1, the lower part of which as a in his

C345549

mm · ·

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Entire with 2 designated ι guiding organ is formed. This guide system consists essentially of two practically horizontal slots 3 and 4, the openings of which are located on opposite sides of the frame 1. These slots are

ί also offset from one another in height and are thus

with in different main levels.

[As FIG. 2 shows, the two protrude into the slots 3 and 4

Edge zones of the plastic webs 5 and 6 to be connected. If the frame 1 is moved in the direction of arrow 7 (FIG. 1), the edge zones of the plastic webs on the front of the device enter the slots 3 and 4, are guided in and left out of them the guide member 2 again on the opposite side eai.

The frame 1 is a hot air nozzle 8 is further attached, which is loaded from a not-shown compressor through a Heizelemenc H with hot air. As Fig. 3 shows, the relatively flat nozzle 8 is arranged at the exit aer edge zones of the plastic webs so that it comes to lie between the two webs and thus the bottom of the upper web 5 and the top of the lower web 5 and the top of the blows the lower web 6 with hot air.

A pressing device 9 is also articulated to the frame 1 via two levers 10. A web 11 connecting the two levers 10 to one another is rigidly connected with a screw 12. The screw · C

• ·

• ·

• ·

C ff <4

-4-

protrudes through a protruding part 12 of the frame and carries a nut 14 at its upper end. A helical spring 15 arranged between the web 11 and the projection 13 of the frame coaxially to the screw 12 presses the web 11 and with it one at the ends of the lever 10 arranged roller 16 downwards against the plastic webs 5 and 6. By actuating the nut 14, the web 11 can, however, be pulled upwards, whereby the roller 16 is held against the force of the spring 15 in a floating position.

The device described operates as follows t After the two edge zones of connected Kunststc fbahnen 5 and 6 under lifting of the contact pressure (tightening of the nut l4) in the slots 3 and 4 were introduced, the device in direction. s arrow 7 (Pig. I) moved. The facing surfaces of the Ra? «Zoneη of the plastic webs softened by the hot air ^ nd then pressed against one another by the pressure of the roller 6.

According to FIG. 1, the device has a Ku ft; 17, which allows sliding on the base. Instead of a runner , a guide member 18 (FIG. 2) can also be provided, which slides on a rail 19. In principle, it is of course also possible to use wheels or other supporting elements which allow continuous movement.

The connection of the two tracks 5 and achieved in this way

lilt Il ·· · k · I »· ·

111 ··! · · · T

ti III

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extends over the entire overlap width a (Pig. l) and is therefore extremely resistant to tensile stresses.

However, the device described is not only suitable for producing an overlapping connection. In Fig. 4 it is shown how connections with additional material can also be made by a slight structural change. For this purpose, the device has an unwindable roll? 0 with an additional strip 21. The Randzonsn 22 bzs. 23 Jer plastic webs are guided here in two practically in e ^'n · ner main plane lying slots (Fi.g. 5) ^ in.- emerge from the Fo ^ approximately organ like, ate ^ si both come to lie below the nozzle 8 . The St-. 'Eii τ. 21, on the other hand, passes dt ¹ Pü \ u ± 'ungs- or; at dv ui eir a central slit above it ._ ■ -: ■ unj. ti c bf aalb the nozzle 8 from ,, Ie fcj.nanüer facing '^ n surfaces de ?, ßab-.ien 2.'. ¹¹ Hd 23 aine). ^: be :. 3 and the Streif as ° .l anderserse ^ vjfc C ¹ Ti thus c. iroh the exiting hot air is softened and _{pressed against each other by the? assifcr &} , .i dej- · pressure roller l6; n, and r teinand /. verbi .d ^ n.

Nen In both just M.schrieb ^ ^Ausfuhi: ungsformen can üich state de role Io ciL, 3h one other ;: A. 'oreJorgan, such as a smoothing itscbn.h verwväi the..

The device can basically be moved by hand. However, it is advisable to move them by means of a pulling element, for example a chain or a wire rope.

digit, with the pulling element from a motor-driven drum arranged at the end of the movement path can be decoiled. The connection process can be controlled from a central command post after the sheets have been inserted. If necessary, you can of course Install limit switches which automatically switch off the drive motor of the drum when the end of the web is reached.

In principle, it is of course possible to anchor the device in a stationary manner and to move the ^{plastic webs to be connected z 1 '.}

The device described is suitable s: oh zurr. Connect sows ^ mlic! he thermoplo ^ Vischer plastics, ^s ie eispielsw3ise tracks and Piachen made of polyethylene, PVC etc. Thanks to Rossen a width of the seam is d: .e tensile strength of the joint auSerordcntlich large. While the previously usual method was wrong about seven running meters of plastic sheets per hour, the described device allows an increase in performance to about twelve meters per hour.

rille '' CiV.escb -i e ier_ merlanals can be one or λπ any ivombinai lon with each other c be essential to the invention.

Claims (8)

Protection claims 1. Device for the mutual continuous connection of the one adjacent edge zones of two webs made of thermoplastic material, with hot air being used to heat the surface of the webs to be connected, characterized by a guide element (2) for the edge zones of the plastic webs to be connected (5 * 6j 22, 23 ), which has at least two practically parallel holes (5> ^) open on different sides, a nozzle (8) that can be acted upon by hot air, and a pressing device which exerts pressure on the edge zones of the plastic webs continuously emerging from the hole , whereby the edge zones, in the event of a relative movement between the latter and the third device, first pass the guide element, then the hot air nozzle and finally the contact device. 2. Apparatus according to claim 1, wherein the edge zones de ^ Kuns'r-s'coffial'inen overlapping with each other * "" a characterized by the fact that the two slots (3. »^) in fi ^ s; i1 sriprifln Hsiintphpnpn 1 i s> ß - * »ri —— - - ~ - —-— ■ - ■ - - ———— "■■ - '" ■ "" * £ ■ "- - * - ■ - ■ —— ■ - ■ —— - - ■ —- ^ j - - - UTiCl wipe the hot air nozzle (8) in between Av.sti- ^ ttöoffungen the two slits is attached (P: λ. I to 3) · 3. Apparatus according to claim 1, wherein the two rare zones -8th- of the plastic webs border each other and are connected by at least one connecting strip applied on one side, characterized in that the slots of the guide element are practically in one main plane and the hot air nozzle (8) is arranged above the outlet openings of the aforementioned slots (Pi. 4 and 5). 4. that the pressing device is device according to claim 1 to 3, characterized in that a spring-pressure roller (16). 5. The device according to claim 4, characterized in DAB the spring pressure for inserting the web edge zones can be canceled. 6. Apparatus according to claim 1 or one of the following, characterized characterized in that the same along the connecting seam to be attached, e.g. on a skid (17) oc? over a rail (19) is displaceable. J. Device according to claim 3, characterized in that the connecting handle " ^f 21 " runs off a roller (20), see is arranged freely rotatable on the device (Fig. 4). 8. Apparatus according to claim 6, characterized in that A « • a · t · t -9- that their movement is operated by means of a motor Pulling element, e.g. a chain or a wire rope, takes place and can be controlled from a command post. Patent attorney