Device applying of the ultrasonic effects to operations such as cut, welding and others carried out to textile articles or in sheets, woven or not partially or completely thermofusible.

the invention concerns a device for applying effects ultra sonic to operations such as cutting, welding and other, executed in textiles or sheet, woven or nonwoven, partially or fully thermally fuse e.

Corollairsment, are within the scope of the invention the machines or equipments having these devices.

The object of the invention relates to technological fields to the production and transmission of mechanical vibrations in general, to methods and apparatuses for general use to produce and/or transmitting the mechanical vibration frequency infrared sound, audible or ultrasonic, for performing mechanical work, marking, visit, bond or separation of textile materials, to an acoustic sound generating devices not provided elsewhere.

According to the invention, it is desired to substantially improve the conditions of some of the jobs or operation, that require the textile articles or sheets of paper, woven or nonwoven, and made partly or wholly in wires, fibers or hot melt material.

This is particularly the case cutting operations of the selvedges and widths of fabric strips, or other.

Currently, the cutting operations, solder, executed synchronously or separately, are carried out in various ways by various means, especially by cold cut, by hot cut, the results obtained have quite often defects such as hillocks welding after the cutting of woven or nonwoven textile articles, which causes an effect " dolly * during conditioning wound of said articles, while impairing their presentation.

Furthermore, in the case of a hot cut, certain tissues are carbonized, despite the required isolation tools, the reliability of use is insufficient.

Remedies these drawbacks by the device of the invention that applying the ultrasonic effects known in themselves, to operations such as cutting, welding, and other operations performed in textiles or sheet, woven or nonwoven, partially or totally hot melt. This device comprises a generator of ultrasounds composed particularly of a low frequency current generator, an electro-acoustic transducer directly carrying ITO indirectly a sonotrode constituting 1 * outil, facing the soaotr-to-an ODS and noted in extension of the latter_Receive being Eontë an anvil or anvil supported aperiodic whose upper part securely carrying the transducer Ileetro-to-aeoustic, the woven or nonwoven articles being engaged between the sonotrode and the anvil which exert their effects by direct or relative mobility.

Another feature of the invention resides in the fact that the support aperiodic carries the anvil in its lower part, either fixedly or resiliently, said support forming a gooseneck having dual ' anchs upper is secured to the electro-acoustic transducer, along its mounting, said support passing through or not the textile articles or sheets to be worked lengthwise® centeredly₅ transversely or otherwise.

These and other still shall become apparent from the description that follows.

To secure the object of the invention, without however limiting capability, in the accompanying drawings:

figure 1 illustrates only exemplary embodiment, by a perspective view schematic nature, the mounting and positioning of the medical device will not limiting embodiment of 1' a, on a cutting machine hot thermôfusiblss tissues.

figure 2 is a perspective view on an enlarged scale of the support and attached, of e® mâms device.

figure 1 is a front view year partial cut of the device, particularly showing one embodiment of the montag® none at all limited elastic encluns in the carrier.

figure 4 is a view along line 4 - 4 shots taken of Figure 3 ·

figure 5 illustrates another embodiment of the anvil of the embodiment with another resilient mounting.

6, 7, 8, 9 10, 11, 12 and drawings set top 13 are views respectively in plan and elevation views corresponding pairs, showing a few embodiments is exclusionary none at all of the anvil or anvil.

Figure 14 is a schematic street large scale showing the rolling by edge thinning and cutting the d * a textile or sheet.

Figure 15 shows by a view taken from a purely schematic, several possible positions of the device according to the invention on a machine.

Figure 16 is a partial front view illustrating a purely schematic application variant and mounting of the device in order to perform the cutting of strips or standard widths.

Figure 17 is a front view of the transducer.

Figure 18 shows a perspective view schematic character to the mounting and positioning will not limiting the inventive device to execute a cross section.

Figure 19 is a cross-sectional view illustrating one embodiment of the resilient mounting of the sonotrode.

Figure 20 is a perspective view showing an alternative embodiment of the device according to the invention and in particular of the anvil.

Make more specific object of the invention, it is now describes a non-limiting manner with reference to the examples and embodiments is illustrated by Figures of the drawings.

It is known and is rappelie, for a better understanding of the ensemhle, an ultrasonic generator aims to transform electrical energy into mechanical energy, from the mains voltage to obtain high frequency vibrations.

one ultrasonic generator is generally composed, in a known manner:

- a low frequency current generator, comprising an adjustable power of car-control on the mechanical resonance frequency of the electroacoustic transducer. The generator is schematically illustrated at 00 on the cutting machine shown by way of example in Figure 1.

- an electro-acoustic converter designated as a whole by 0 and including a transducer 4 which in particular by means of a quartz plate placed between two steel trays (phenomenon of the piezo éleetricit ©), border transfers® the electric oscillations of Sn-mechanical vibrations³ ©®mercnsqualau ls magnitude, to Trey low rpm® of £for telling a direct operated upon by the outiXo SOA vibration TACOS communicated to a_P wherein trggisnst and am " plifie vibrations of the transducer to L^Ooaûii₃ its L.^C. a left atrial soaotrodssaesoQGaaz *

Ssloa L.^F. i2x? entiQB.<" © has facing the sGSGteoi ls® χ and especially in Is extension OD © ettsdôraiôrenoatls an anvil 2 is fixed to a carrier 1 to d°atteindre aperiodic oscillation-free carried d position * démarche₀ the advantage® of the support is integral with the upper transducer toto lîeeir aecusiiqae ^ 4.

Ls medium aperiodic .3 comprises₀ D.⁵ preferred aamlre unun.s_P each of OEL in forums © eygsiSÿfersnsfes whose upper Horizontal present a housing in which is integral with the transducer 4 © FISs * notasmesit year means&S as 5, © oopérsnt with a circular groove formed on the periphery of the 4 - transâmetsur

(fig. 2).

P

the lower limb âu carrier 3 presents in its front portion a circular housing ^ reapect® had drilled, wherein is established for each way UNICEF or&°un3 aanièr © elastic, the anvil 2 complementary shaped bone they Qn=logSEs.i , 3 ^ ο monosaccharide

ponse

two braneiæs 3 and 3 are measured between to Lst g in "? rear parties,

directly or.&⁹ each way - reported, by a vertical braaeh® - it

1®Somus ^ P-longer shown in Figures 3 and 5 bimLiersnsnt, the L^V.enelims g is mounted elastically rests in the bottom MD housing 2l^{the m} in particular a spring coyen β appropriately rated, or other elastic means® the spring $&hasmoysn elastic may be directly mounted in the housing in the j of £carrier 3 and the lower face of 1 * enclume 2 (fig. 3)? bears against the spring 00" in the embodiment of Figure 5₉ 1®rassort 7 is accommodated in a recess formed in the body!⁸ anvil 8®&b. the R * this case get better support each _g® Money Bills CD placed between the spring 7 and the bottom in vivo the pressure of this housing 8jt spring 6 or 7 had adjust the height of the anvil g or 8 sec.^D operates by any means erffective powerU&bsesl and - suitable, noted at means d⁹ each screw 10.

The I " © AE MLT * 2 is pushed élastiqusmsnt by ensuring each pressure against sonotro&th the ts fig. 3 illustrated the dgas₀ the anvil 8 may stop® in TES # © galsasnthautsurIpaultmnt by a political parties formed in the upper bore 3p (fig. 5) to reveal said anvil between 2 the sonotrode and a slight air gap e, Cornai it will be described later on in the scrip except played on the elasticity of 1' anvil for keeping a pressure or an air gap always constant * sheet or textile articles T woven or nonwoven, partially or totally hot melt, are positioned between the vibrating tool (the sonotrode 1) to ultrasonic frequency in the range of 20,000 to 30,000 Hertz, and anvil 2 or 8 considered fixed relative to the sonotrode U

The vibration displacement of the sonotrode j_ is preferably perpendicular to the surfaces to be welded. Vibratory energy generated by the sonotrode j. [is applied by contacting to the article ii. In the case of a textile article the fibers thereof receive therebetween a relative movement of high fréquenea which produces a highly localized heating of the textile, in thickness, outer without dispersion.

A base when, from these effects, by monitoring the level of energy of the sonotrode j. [, perform various operations, in particular a weld, a cut, a marking, decorative effects...

Controlled melting permit material, to maintain its continuity to obtain a weld. For cutting, the fusion is more localized to produce fiber breakage. In one of the cases, the anvil has directly, or referred a sharp edge referring to Figures 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13,

The method therefore provides while performing the cutting, and at the same time the melting edges or selvedges which prevents fraying * as shown in Figure 15, the joint action of the sonotrode j. [and the anvil 2 product LT. melting in selvage, and therefore a thinning or rolling edges which eliminates the disadvantages of buildups in border that produce the ISS systems of known type *

According to one advantageous embodiment a 1' sharp edge 11^ the anvil 1j [pantées transversely has two faces 11^ f. © rmant _ an inclination angle variable according to the case (Figure 6 - 7 and 10 - 11), this angle being generally, but not exclusively more obtuse as possible, based on the results searched about the, rolling the fabric THE T, to the thickness and the composition of the fabric or article.

According to another alternative embodiment. illustrated addition appeared 8

and 12₀ The I ' tan encXusspsnt also form in its parties suoérisure I-O-*^-

keel-spherical cap 12 © srê'teoEpreagut always msec gjnl *, or have a flat sound d°êoragsnsrt indifférasmsnt © arttscossss sounds of T a sluice 9 and 13 represented appeared ", under ostto last embodiments the sounds flat crush * D. 1, 3 ΐ lC® the eralur © J3_. allows

the rolling by thinning confectioneries SS edges D® 1⁵ item 2_{the FF} the Saos

W ^

ridge _ 13g allowing the ®&M.O_D

B.® most s the enclmeçrsslios theGus soisat SSS-shalt stablishe characteristics is easily interchangeable and has spent circular section (appeared drawings) if pslggeuals and interfering ^ rattle flat ₉ noted for the large puissaasss₃

There is also -, coess represented in the off valve used is of the figured! 20 ovsat ascend to the portion of the " lower branch of £forming Ghap®_O the. 3 aperiodic carrier, against a circular tool and rotatable j4₅ having on its periphery ar=Te-plain 14^"Is © © atrs=" eutil EOPA can touruar free centeredly défilensst without the action of 1^I item 2 or firing® positivementp rotated either by the KPU © FNE_O either independent CD and stopped any means suitable as moteuro II results from better distribution of said center=1° usure © negative electrode .Mthe O

disclosure - 1° isles, the artdolss of tontines Eu in the sheets T are aniseisIsaials and caused or engineered amtrsnsnt_{the R} either by scrolling said article T between the sorotrofisJ_ and L^Osnslm and 3 2 (longitudinal strokes)₃ figure 1 illustrates ceases_P or by motion of the sonotreâ © j and the counterfeit anvil!! 2 with respect to the article 2 which is IesbcMIs or stopped for 1⁰ (transversals shots) operated except the O

0a has shown overlying appeared 1_Receive 3 mounting the CD 4 M.

anériodiaue carrier 3 in the direction of run of 1®item e

^, 4" according to arrow W₅ the positioning portion is in the nanotransistors j3 Xigas of shots₀îfin facilitate spent # edges of O - SEP_?

the basis of the vertical brenofes 3g has a reduced section in GBP.

11 is provided another assembly of carrier aperiodic 3 -, GOisre shown dotted in Figure 1₉ according•- which, ©-DSS's wants to carry out operations of counts in other 1s along or P? Ls of longitudinal edges of the article e₅ all support 2. iO ^ transversely disposed with respect to the running direction of the article. Thus the vertical arm is out of the plane of the article. The fixing of the support ^ and the set occurs at any point suitable existing on the machine, or reported, by any known means and suitable.

Note that in the case of a cross-section, as shown in Figure 18, the aperiodic enemble ^ of the holder is attached to a portion of the machine driven by a movement of translation, e.g. V-on a carriage moved angularly in particular by chain, and moving between two parallel rectilinear slides and £çQ. ^ .all support is in this case disposed transverse to the running direction of the article T so that the vertical portion is located in the cutting line.

It should be emphasized that at the start of operation, upon powering on the ultrasonic generator, a preset pressure is exerted on either side of the article between the sonotrode and the anvil 2, or still a certain air gap, according to the features. This pressure or this gap, as a result of 1' overheating caused by operation tend to decrease. This reduction is compensated by the elasticity of the anvil 2 by adjusting at starting, in particular by means of the set screw 10. the pressure or the gap initial holding them constant.

As shown more particularly in Figure Jjî, provision is made when the anvil or anvil 2 is mounted in a fixed way without any elasticity in the medium DDD,

the elasticizing by any known means and suitable branch

2

upper 15 integral with the electro-acoustic transducer 4. M is applied ^ mth order, with the mounting illustrates exemplary Figure 19>pressure on the sonotrode, much to keep the near constant pressure as previously exposed.

WITH

In this embodiment, the base 15 the branch worm -

ticale back form a yoke in which is mounted to base d -

opera free, a second yoke 15^ secured directly where a^{the R} ~~w

referred upper limb 15 " With this mounting also, especially under the effect of the pressure screw C/O and spring 12 the reverse tilt of the top 15^for the adjustment of the sonotrode atrial

Gum shown more particularly in Figure 13,

can execute the rolling or thinning of 1⁵ item 9.ï by the ultrasonic device alone "the blows is then performed cold, by means of a cutting tool 9 of any known type and suitable" âe cutting tool or means 9 is to be preferentially close to the sonotrode JH are

À note that it does not disclose in their details the various parts of the whole d°ultrasons generator, which belong to the technique "well known, so as not encumbering the description" further the profile and dimensions of the sonotrode 1 are given by the manufacturer according to frequency employed and desired by the user "

It is clear that according to the invention, this device applying ultra-effects " of the sound operations such as cutting, welding and other, executed in textiles or sheet, woven or nonwoven, partially or totally hot melt, can be applied on many machines such as looms, cutting machines, and so on®.

The advantages are much of the description, especially emphasized:

- elimination of fire hazards, heat is generated in the tissue alone, and carbonization, the fibers being fused, cannot be carbonize because the temperature does not increase to infinity horn a heating portion₀

without any very sharp cutting - edge thinning ddeffilochageavee mth forms no surépaisssur during conditioning of said wound item e < >

- afforded by the highly safe electronic reliability concerns the ultrasonic assembly,

- saving in the plane of the fabric and the machine, the device of the invention having mainly " does vertical geometry.

- by increasing frequency is decreased tool dimensions in 1' here the sonotrode.

- which comprises working tools cold thereby not requiring isolation.

^ - the use of ultra-sound for said job requested has the additional advantage of complete absence of delay implementation, immediate effect for startup.