DE1704407A1 - Method and device for connecting weldable plastic straps that are mainly subjected to tensile stress - Google Patents

Description

Int. Cl .:

B 29 c

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

German class: 39 a2, 19/02

Qj) (2Ϊ)

Offenlegungsschrift 1704 407

File number: P 17 04 407.4 (W 45120) Filing date: November 8, 1967

Disclosure date: May 6, 1971

Exhibition priority: -

Union priority Date: Country: Case number:

Description:

Method and device for connecting weldable plastic strips that are mainly subjected to tensile stress

Addition to: Elimination from: Applicant:

Gottlieb Wiedmann KG, 7012 Fellbach

Representative:

Named as inventor: Zaiser, Rainer, 7012 Schmiden; Kuhn, Wolfgang, 7000 Stuttgart Notification according to Art. 7, Paragraph 1, Paragraph 2, No. 1 d. Ges v. 4.9.1967 (Federal Law Gazette IS. 960): March 28, 1970

O 4.71 109 819/1581 5/80

iottixeD wiedmann Κ <ί Machine factory

Type

to the application from

3.1KdT ^ ₁₁ ,

/.07

"Ancestor and device for connecting mainly on train stressed weldable plastic tapes "

For strapping various kinds of packages, such as boxes, iA'iketen, or 'bundled' mids, generally find steel bands Used by hand or by machine to move the package ^ ele,; t and pulled tight, whereupon a iiuet rope connection, the Perhaps there is also a separate piece of filler attached, which is overlapping üandenden united with each other. ) erarti; e outline = However, sparks are relatively expensive, and so do theirs scrape edges and lack of food for some pack = stumpo un-jeei.rnoto

.'iaii liu t therefore already tried to carry out hmreifun.-jen with weldable r.uniätstof'fbandern, the .u.-jf esti; keit, a viilli-jen Uostfreihelt and Vorbin « _{lun:; sfiü;} '; liclikeit by mere welding for this task ^ eei jnot appear. Jis occurred, IUF, however, insofar Difficult = cold, when sufficiently strong plastic bands we of their J> not icke on dom usual we \ o be welded by means outside an attached heating jaws, never heat does not penetrate / ienü ^ ond by, erührun to f) ; * szoneii dor mandla ^ en to shape plastically without the lio outer material zones have been practically destroyed and thereby the tensile strength of the welded parts inadmissible; sinks.

To remedy this, a touching surface was applied to the flor iland « la ^ en "', (" directed Innonb "hoizunR provided for between the Overlapping ßandonde briefly an electrically heated Ueizplatto oin ', we open, after their withdrawal e Ln l'roß » et traffic light that presses the θΓ * έίΓπ ^ βη hand ends together.

109819/1581

SAO ORIGINAL

Gottlieb Wiedmann Κ'ί Machinon factory

to rnitra ··; from the '3.11.07

at the

üie invention takes a different route. It proceeds in such a way that Ln the one of the intended connection point aligned with one another Pressed; change one or more to the flow temperature The heated pins of the material to be treated are pushed in and through in such a way that holes in the tape drawer with plastic and from La je to La / ye '.ünid / oneu üiitestand, whereupon the locals are withdrawn and that Sand material cools down to form a solid welded joint.

driving the known ancestors accurately observe the heating time required in order not come sum i-'lieflen too much band material, the method according to the rOrfindiin ^i; less sensitive to handling, i) the duration of the application of the ignition pins is not decisive for L.im. The device · for / Vusiibuny laüt rfich make the process easier and "reading process itself is more versatile, a can so that the landing! Been verschwoifJt of f uireifungen as well zweii- or inehrl ι \ Ί · * β lireuzutijsstellen of art material RIBBONS . Finally, it can also be used to manufacture utility items from plastic tapes.

tloini apply dos procedure according to the: Crfindun-7 it is and "yenUift to push the heating pins through just enough so that they are in just immerse the lowest Uandlaje.

In the device for the AuaUbun, «; In the new process, the heating pins are attached to an electrical measuring body, dor in the manner of oiner ivleinmbacko _; "e, 'jt> above a' .round plate, which can be placed under the parts to be connected to one another, is movable and is arranged with a dio Uilnder aligning and pressing against each other to aimnonarboitond that the heating pins

109819/1581

_{J; V} OHC "* ßAD ORIGINAL

Gottlieb tfiedmann KCi machine factory

Type BUtt to the application r from the 3.1 1.67

only come into engagement and disengage again after the hold-down device has been advised, as long as the hold-down device is in operation is still active.

For this purpose, the proportions of the heating elements such as number, dimensions and arrangement are matched to the proportions such as length, width and thickness of the connection to be made. A row of pins is provided for longitudinally connecting the narrow plastic strips, while rows of pins with staggered pins are arranged next to each other to connect relatively wide plastic strips, so that the outer rows of pins can overlap the edges of the strips to achieve a type (andscliweiiiung. Such different situations will arise the device in that the radiator on its support is interchangeably arranged with other pins = arrangements. Instead, one can interchangeably arrange pin arrangements of different properties on the heater The penetration depth of the marking pins in the London plastic strips to be connected can be made adjustable. ■

.if a tape to be treated, as it is when strapping a pack = piece of the case iat, should be tensioned in the closed state, manual clamping devices are assigned to the welding device. As such, lie von der Spann- and Ichlioßvor = are suitable directions for Stahlbandumreifuiigen her well-known clamping and Trein rolls with line contact. In addition, the device be designed as a handset that can be attached to the package iat and the linden trees are welded to one another using a plastic band pre-cut to length. Jie device can also Part of a prepackaging package · * «. bUeUn uie that of a supply roll

109819/1581

0AD ORIGINAL

Gottlieb tfiedmann KGr machine factory

Type

to the application from

3.11. ^ 7

βμη

-L r / 04407

removed tape automatically around the package: shakes, tightens and closes.

In Fig. 1 of the drawing is the scheme of a device / um Carrying out the method according to the invention from the side, 'ever see shown.

The overlapping tape ends 1 and : 1 are to be welded together. For this purpose, the welding device is provided in such a way that they sit on their virund plate 3 and above them there is a hold-down device h and an electrically transmitted heating element ⁷ S with heated pins o at the bottom. The thermostat (not shown) is connected upstream of your 'leizkorner' to keep the temperatures provided in the pins constant. To sides of the radiator are once a clamping = roll 7 and on the other a "friction roller <-i arranged to clamp amphibian train of the driving roller 8:. In ü.'ndendo Ί bet by the vloimrolle 7 is firmly held other landing 1, as a Linreifung i ^J ack = piece of plastic band to be closed, but leave the sections located under the hold-down device h without tension. The hold-down device U and the locking body 5 with the pins on it can be moved up and down, namely like this that when pressing .ms an upper uhesteilun ;? bxcIi first the hold-down device h lowers onto the tape ends 1, 2, aligns it with one another, for example by means of lateral guides, and then presses it against one another. They are pressed into the band layers 1, 2, cause the band material that surrounds them to flow and push forward to the lower ilandla-re 2, so that the material flattens at the contact between the two la.-jon mi we merged with one another. To the

109819/1581

BAOORiQiNAL

Gottlieb tfiedmann Kg Machine factory -.

. 5 »

Type

on the application of November 3, 1967

To adjust the penetration depth of the pins 6, a height-adjustable stop on the round plate i, which limits the downward movement of the heating element 5 and its pins 6, can be used. As a result, the pins can be arranged simply by dipping them into the lower jandla; e 2 without piercing them. After the Sc'iweiüvor. ^ An ·; the heating element 5 is raised and its pins υ leave the welding point, while the hold-down device k continues to press on it. An intermediate position of the radiator 5 can be provided, for example by latching, in which the hold-down device is still active and which is maintained until the welding point has cooled down and solidified. i) The described cooperation between radiator and hold-down can, as shown, be made possible by a b · = «i; r <* nzten Foderuniiswe * between these two parts.

Fi, ';. : i zo ± r, t in the plan view the finished connection point of a slim plastic band, the ends 1 and 2 of which were welded to one another by means of a single row of pins.

Home wide plastic tape / -, according to Kig. 3 a more »clean pen arrangement was used. Here the rows of pins are offset from one another in such a way that all pins and thus also all of the individual weld points have the same distance from one another. This prevents tension from developing in the connecting part. In addition, the pin arrangement is dimensioned so wide and long that the outer edges of the pen and the edge of the two dandles 1 and 2 have about overlaps. • H · so rait ^ «bildot · Handaohv« iflung is with br «it« n 8ünd «rn, di

109819/1581

BATH

üottlieb Uiedmann KG Machine factory

Type

to the application from

3.11.67

Ί704Α07

yes exposed to particularly strong tensile stress, rather vorteilhaft5 by the stress * distributed in the junction uniformly over the width and Ad hand (= ^andauabie; iun (Jen prevented.

In the case of narrow plastic belts, such a (and = welding) can be achieved by the \ ferwen = dun / i a multi-row arrangement However, in the case of the narrow ücind, a central curvature can also be added, as _{shown in Fig. 3} 2.

1 09819/1581

8AO OBtQINAL

Claims (1)

Claims 1. Method for connecting predominantly tensile loads weldable plastic bands, especially for joining the overlapping ends of dandruff strapping at pack counters, characterized in that in the aligned at the intended connection point, pressed one on top of the other bands or several pins heated to the flow temperature of the material to be treated are pushed in and through, that in the Uandlage there are holes with which have become fluid and with themselves Edge zones that merge with one another from layer to layer are created whereupon the ifoiz pins are withdrawn and the tape material cooled down with the help of a solid welded joint. 2 "The method according to claim 1, characterized in that the Only dipping ileiz pens into the lowest iJandlago be pushed through. J. Apparatus for carrying out the method according to claim 1 or 2, characterized in that heatable pins ((>) whose conditions such as number of digits, dimensions and arrangement depend on the behavior such as length, width and size can be coordinated to be produced Vorhin = manure, are placed on a radiator (5) ati, which is in the manner of a clamping jaw ^ o; euübor a round plate (3) »which under the Jjandteilo (1,2) to be connected to each other autzbiir i.st, movable and so aiii the! children align and press on each other,! spring holder (h) cooperation is arranged so that the first time after the hold-down device has become domiciled, the hold-down comes into, reef and out of the attack are, as long as flor ^ ifMlerhalter is still active, 109819/1581 ,., ..,. _, SAD ORIGINAL Gottlieb Uiedraann KG machine factory Type to the application of 3.II067 Qkftt 170UÜ7 H _t A device according to claim 3 for narrow longitudinal connecting = art fabric tapes, characterized in that a row of pins is pre-view "or the edge side engages on mb _o 5. The device according to claim 3 »behaves in particular for connecting = moderately wide plastic tapes, characterized in that several rows of pins with staggered pins next to each other » are arranged, with outer rows of stitches overlapping the edges of the dandy can. O ₀ Device according to claims 3 »^ or 5, characterized in that the radiator on its support can be exchanged for those with other pin arrangements. 7. Device according to claims 3, k or 5 t, optionally also 6, characterized in that pin arrangements of different properties are interchangeable on the radiator. 8. The device according to at least one of claims 3 to 7t thereby characterized in that the depth of penetration of the pins into the plastic strips to be connected to each other by means of suitable Means how the working movement of the radiator can be adjusted! limiting stop that is adjustable. I. 9. The device according to at least one of claims 3 to 8 for strapping, characterized in that for tightening the Plastic strap clamping and tensioning devices (7 * 3) are provided are that de-energize the tape sections at the junction left. GOTTLIEB WIEi) MANN KG 109819/1581
^{OR |} G1NAL