HUE030816T2 - Method for manufacturing a tear line - Google Patents

Abstract

The device has sections made of plastic, particularly an inside paneling material for vehicles, and a bearing (3), by which a cover material is supportable. The tool is formed by a chisel, if it is moving back and forth with a frequency from sixteen to seventy kilo hertz. An independent claim is also included for a method for manufacturing breaking line in back of cover material.

Description

The invention reiyesto the use ofim »&|pr 'föíő fc* the: tgar s;% of a covering mmen.al λ high preftrabh ín si least one sehtion is twite fofpiasii%uh panicularan intetioi mm Sfrsterial for vehicles

SiiiiiCiliii np'U. c* \ro »0 \« o»\c *no n (vt. . ^ Oi tní!ií^Oxvns. prfií.eI^. steelotg vvnees cep? or other interior trim materials, hi order to create a tearline m the hovering maters&is for ián atrhőg behind Such an apparatus Is known from Pt’ 2oi fo 542, tor emmpt®. Theioo) rs is; -his case formed by a knife edge which does not remove material h our foe cut produced In ifee: rear side of o tltirmoplastic coverfogfolnt Wihfo this being:'.moved: %msr§s*. fottewingt|e desired ipsth of the tear 11¾¾. ^acie hhd forth:

To prekem the iknk surfaces of foe cm produced by foe oseiHaimg blade in the thermoplastic covering film from socking topfoer immediately aierwatife arelea.se agent wMchwms the tiankssnrflaeeds apoked to the freshly produced cal. The correct delivery and propottioolng rfotfee mlessohgerít are problematic·, becsüse too small a quantify results m.the Sank Mrtacos sticking together and hindering the controlled tearing of the covermg iim in the eoutseof foe tear line, which ts desired in the case of a car abcidfofo and because too large a quantity results in releaseagentgertirtgontolherear side of the covering film in the vicinity of the tear line and: preventing the rets side iif tblkmegidb from nicking to the tbam backing in a desirable manner and at the very least blistering. WO 2004/026629 discloses a drib bit which has a path of the angle of the point winch has two stages and becomes larger. DE :1529686 di&glpsetm h&vktg art ultrasound dxil bit which in its from, section has a point ahf|k which becomes increasingly larger in the dfonfotm of tM cutting edgo. ' η ν ow ί ο V ’ ' J χ e ^ O'f ν ' D ^ tu*. ds ο m> m Vu|i'v '5 * dilim I The drill bit bas a point angle. 1* t ν uOp \ t h. 'm x > >r»\ 'da m* apput '5 ^ w s an t \ m \ ο \ tm ι ΛΚν the reliable opfálioh: upon mleaso of an airbag, and maker a super! uo«s-s*> these objects are achieved according to the invention by a method according to cr«m s Particularly m efevted embodiments of the invention are provided m the dependent clasme s'he vnec.t ο·; λ ha^D on the concept pies cm see the covering mattnál no?r mat mg n region of the mar line rvhhoufgygeosive additives

The h;gh frequency of the hack ana forth mosermnst oftbmhi'lll felt results m such extend- i.v'UV ' ^ s V.XÍ \ t* X " ' . t t\' ! gOx Ox \e >.0 U ' ?«. v v 4 " tastes u) ;s dmuiaced horn the region of the tear line. In this case, not only can sucking Ov prevented. but the result is also Improved cutting quality

Due to the removal of material ttom the tear lino there is no ash ot its flank «ηκ.ο* together afterward! IT is not necessary to add a release agent for th\s i fcs f mine m Inc mm: line obtained in t.ht|way can. be predetermined with high precision a act uteidom '.-esuod»· reliable tearing of the covering material in the course of the tear hue upon release o> -·!ν airbag. Furthermore, t «habié sticking of the rear s-de of the covenng- mgtetitn ohtmnevi α}·.ι foam baching is guatarttocil and in the region of the from side of iw.ν.Λ tear line formed m the rear side cannot be seen the Mil bit has, accordhig so the mventbn, seen parallel to the direct mo of ms oacK ano :<-nm movement, a point angleohich becomes inewemigly larger is the atreetion o.t tee >.nvUg«> edge. áp$.; mill, the transfer of heat to :;^.t the bottom ot the tear m^. produceu by the drill lit Is increased, and transport of the material out ot ine mar nno pfodüeédtind /letiee: grp cj#tg;« favoured; driU hit is defined at the point, measured in the dhecdon of the patiti of the tear Hite, frefeabh bv ^convex! v extending cutting edge. This results In greatly increased durability of the cutting edge, and the drill bit can be moved forwards along the path ot the tear line without being oxrouded front the- cO'Cring material lurnhcrmor*. the- formation of notches at fhibbttom of the tear iltepdiied m# Injait operation, can be avoided . According to £#8ft4opmeitt or the invention, the dnll bit, measured transversely rathe path of the tear Hoe. has á point angle from 30 to 45°. Thus it turned out that effective heating of tfrgAovemg matériái uccui swift stffrioM aiilig, Éíllbaarne tiÉ&amp;ft effect, so that a neat tear line can be produced swiftly

The drill bit can further be defined l>v eonvexly outwardly curved side wells at least in the to be produced, seen parallel to the direction r-f the path of the tear line. As a .««nit the Aid ho eon be rooted about ns ase- to- pure e<. a o,!b-A- y,*. not ut> winch is curved at least in some areas. tn da' \t oo í voaie''h*-s ,¾ e *h *» f j v* ~he pt sr< measured in the direction of the psthofthe tear hue As a result; m conjunction with the high-frequency back and forth movement, a tear line ofttnifonK profile with tight radii can be produced. .According to a development of the invention,the forward movement of the dill bit In the path of the desired tear line is caused at a speed írom e lő SO mm/s Within this range, particularly good ermrottr sharpness of the tear Hoe produced as well as a particularly economical manner of operation are obtained, fie drill bit appopIgtflyAafr be;* of the desired rear line. This ailoWs pdrtiutgtly rapid exchange with respect to the manufacture of differently shspe- t tear lines i ^ edto - g t « 'ik i m m o.*tc, ii k v 'cwovmot- tn TIere, It :s pantcuiady preferred that the tear line Is provided in ns path with breaks in which fhiv drill bit Is moved forwards without touching the covering material The intermediate zoue8 pcnw\n fee IraMCUfe wcfevw of the wa, hue -or then f»nm the fengtw wfeeh Hok! im te ofemfetese of the

Brief de^iffeo^^ p^ure 1 shows schematically an apaxaw being used, ii I cross-· sectional view

Figure 2 shows schematically a covering material provided with a broken tear lifté, Jl a view from behind.

Figure 3 feowp sotaitlehllf &amp; drill bit in a view from fee side.

Preferred cffibodimenis of fee invention are described beiow in detail wife reference to the acoorupanyfeg drawings.

\ * ,*ν ,nv>' λ»' wx> w .-, ode m-cmvo w -"ow' w κ na» ^alo o ii^K 1 m u cv-ss-sown. »fe o' *' o -. w n »"- vv^”1 f i‘ v w fee at ' *o of a eovedno material 2 which can be used for example as an instrument panel., steering wheel cover or other interior tarn portion for (motor} \em-Jes .m fee. present emnooMBent tne cowrfeg material 2 is made of ooh propylene us s customary mixture 'won h.FDM. and ean h \\ v UxWO <N v \\n N + o ' ^ t> ^ * be * <f 1 u,: ~· tvo?*}, lltovever, p should he noted that within the scope ο» fen un cniwn fee most vaneu covering materials can be used, including films, composite materials or rigid materials.

The apparatus according to fee invention comprises gft feiexife# feppott .1 by which fee covering materia! ! ears he supported, and a too! which is mounted at a distance thereabove and can be moved back and forth tv motor in the direction of the support 3 and which own hg sunk in the rear side oil he cover mg materia! 2. and moved forwards, following the path 5 of the desired tear fete » A sonouode or other suitable wtrssouml device can be used as the droc lor she tool for example. ., . , < ,.,,,. , transversely to the path 5 of the te&amp;r line i vhi- tool is tc$mm In? 8 drfo bn 4 wtu*^ Me<u-mw fo «,ir.t .»»te ttom 20 M 45'. for mmpta, .«d »f^h ll« >«<* »rf parallel «. «* toogrn«ii,»l direction of foe Λ» ba 4. « ««d M e tta,u«€y tom i 8 to af; ps-fo. The associated amplitude of die hack-and .«-**«» W'^tivti-.b vb^VvC λ "lv respestivo covering and -is 2o urn in the smo^uimefo.:

The f|r-!i bit 4 it moved forwards at a speedfoil B mm/second, following foe path a of the feeI:If ««á in such * oiThe covering materia! 2 of 0 > mm is preserved,: 1% drill bit 4 Is ddlnetfly a amvexo emending eufoog edge o si die pwnt measured in fos: director: of the path 5 o; the tear line I-

The drill bn 4 has. wen parade) to the direction of its bach and forth movement, a|foiMMgfo which becomes increasingly 1st act' $n the fotccuort ot the cutting edge b it nt rtettned by cotwexl) ouiwarolv curved side wailiAthf mm parallel to the direction of the palit S..of thpdgpf ihl# 1-

Figure 2 shows a -.covering materia) provided with a orokpp tsar lim BalM.. W-tbm fos. path \ do hr cm tear hr,on ~w nivooJ ap.ei 'for., oav.ii who: b\ ,* bcTao-Cv. \

Winch serves to hold fast the cut-out portion surrounded by the toairiiddf puunhig in a ring shape, as by a hinge, when an airbss is released The tear foie ! can}m interrupted under •p> v. u v *v m* a \ » v v -5 * v fo 5 \vi\ po Ov siót" > he cw^mst material 2 in the region concerned following the desired tetirte L without touching foe r« fide arid without producing a tear line there,

Figure 3 shows a drill bit In g view from the side. The drill bit 4 las a length l. ham 0.2 to 3 mot st the tA'foi. measured m the direction of the path S of the tear one \

Claims (6)

FOR THE PRODUCTION OF PREVENTION LINE ISMARIAN GARAGE iZAMDALM 1, Making (i) for producing vehicles (2) is preferably at least saifcMftfeér *. n # on the back of the upholstered request for upholstery material by means of: a means comprising: a support (3) on which the boron material (l) is supported and a tool which moves over a distance at some distance in the direction of the support (3). Which can be immersed in the back of the cover material (2) can also be moved forward after the slope (S) of the kinky burst line ()), which moves the tool (4) back and forth between 16 and 70 kHz. It is carried out at a frequency of 40 kHz, characterized in that the tool engages in a chisel (4) with a chisel (4) inclined towards the cutting edge (s) in a direction parallel to the movement of the die, 2, M Demand Pine Characteristic, characterized in that the chisel t4) at its tip :, the fracture cut line (i;> léfútlsi's path in the direction of £ 3, convex at least at intervals) its boundaries (6). A method according to claim 1 or claim 2, characterized in that the chisel (4), on the hollow path (1) of the semiconductor line (1), has a peak angle of 2 ~ ~ 4SCi (measured transversely to S1). Method according to one of the preceding claims, characterized in that the chisel (4), at least the breaker line to be made (the area of the jib, and the direction of the grooves (1) parallel to the path (S), is kprwez, outwardly outwardly). bounded by sidewalls 5, One of the previous Claims: Sethine: A process characterized in that the chisel 14) at its tip, the chopper-weft | measured in the direction of, i:, 2 ~ 3: mm in length. Method according to one of the preceding claims, characterized in that the amplitude of the movement of the chisel (4) back and forth is 5-40 micrometers, preferably 20-30 micrometers ·. Method according to one of the preceding claims, characterized in that the chisel is moved forward in the desired position. (In a 1 # runway (at a rate of S 1 S-SO mm / s, δ. A method according to any one of the preceding claims, characterized in that the chisel (4) follows the path of the desired windscreen (1)), A method according to claim 1, characterized in that ai%! $ zaklh> line (1) is provided in the run-in path (5) with interruptions (a) in which the chisel is formed. (4) moving forward without contact with the cover (2).