DE1931879A1 - Process for forming objects in a closed, multi-part form, closed form and molded part with a one-piece press burr - Google Patents

Description

Me here © invention befafit. see © It öer formation of G-ettstands in ..geechloasenea forms, also those of the formed Gegeaat-aadi through, separating the Fon® parts from each other will"

With the a @ n Poimverfahre »iat © ® übliöh _$ ύ®η Vormhohlrmm about» au overföllen, so that no bubbles o ^ er aoi & r & uaa iüi formed object or molded part aniseteheiii the tiberaehueaiga material forms in the Ebsn®., In the ii @ porate weröUin iroiieinaiider separated, a fr "Sgrat, d © r entfexo t be _t siu6 the molded Gegenetfi.nd daalt acquires a bsfri © äigeade üLuSenfläch®. With certain Eat © riallta kassi dia removal this difficult tm; ^ eltFa ^ fesEi ssia ₉ mud wenR file li

forest object feaao-damaged accrues »

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90983 1/1353

The present invention is based on the object «, dieee Overcoming the difficulty through a different design of the fora asu, ao that a press burr is produced, the one such shape has that it is easily removed from the molded article can be, whereby - if at all - hardly any danger for one There is damage to the item.

In order to achieve this object, the invention provides a method. from forms of objects in a closed form consisting of several parts that can be separated from one another, with the outer space overflowing, so is the outer space. Fonssaeterial around the outer edge of the object forms a press burr, whereby the present invention provides for the removal of the press burr, && ■ $ ia to the project to his? The connection point to the opposing end "is relatively thin Heabrane formed and it n" * eh outside, away? Oi Gegenöt-2iid _s dieker "

The invention is furthermore a closed structure consisting of atehrereiä, separable Ysiltn, of which at least sgw "* i is between opposite, surfaces a forahoin inside image" which shows the shape of the sm- forming object, whereby according to the invention provided did, vi "iS the each other "have" a Porahohlrauas? whose yeast from the äuSeren Begrenxung to get away for Aust »gegenilberlleijeaden surfaces of awai except de"& U9E? a & X ύα

The invention further iat a Forateil with "ine" a stüokigen ir * ßgr "t, of the won äuSerest} 3egr®nKUßg Porjateile dee" ns Auseu oh r & gt »wherein« 3tfiiuitt? * ££ agea .aes vorgfBeHe "let that the PreSgyat aa »eia # r .A & ^ ehlttSettille en uns Formteil · -die Öeatalt elt & r beträItsii« s * Si ^ Mnm ^ lieai> r «« e feat and n &oh; auS »n & a Ificke atsiiisaÄt» B # $ »eiiietiiaäEige PreSgrat k &si'i eich di« Äua «a» * ite otisF y «<i · Xmuraaelia dta 3for» tei £ * £ 'η * τιΐ3Τ-

«Ine öolöh« £ 2ia »as» rit # -hfel-i *? & K * vß »,» I

809881/1353.

ORJQINAt INSPECTED

its. last Pali "but such a Fredgrat also does both the outside «tie auoh, among other things, the inside of the porateilee extend.

The invention has a particular advantage in the formation of τοη O-rings from ßiasi old minor ^ oleransesi applicable and will has now been described in relation to this application, however, it should be noted that d & 8 the invention as well otherwise generally »with the same or similar advantage is applicable.

The enclosed drawing shows a section through a two-part form of sun fora from Gumai-G-Bingen, this form being designed in accordance with the invention and the cut plane of the accompanying drawing running at right angles to the focal plane of the two shaped parts. The main hollow space 1 on the shape of the O-ring is formed by two semicircular grooves in the upper and lower mold parts 2 and 5; on both sides of this main shape 1 there is a fr @@ grathoMr ^ arranged around 4, which is formed by is cross-section triangular hats in the Fonatei-IibI and 3 _t whereby the abotezid between the KsupformliohlrauB t and the pressure girdle 4 of the preferably formed inside the sulftssigtn keretpraSgratte and can be, for example, on the order of 0.0762 na (three thousand thousandths of an inch). The opposite "!" - parts 2 and 3 of the form "Bind" flee into the same place and "if there was no press burr material" they would touch one another "

At least on the outer core of these three cavities 1, 4 there is a further main pre-burr cavity 5 and, if the inner diameter of the O-core is sufficient, a further main pre-burr cavity L is provided on the inside of the cavities 1, 4, 4.

When using such a forum, the Voluaen

5 O 9 8 S "" · - · 13 5 2

BATH ORIGINAL

-4- 1931379

three cavities 1, 4 and 4 in determining the taken into account and some very material is filled in »λ!» is required to fill this volume. Through this ensures that all three cavities are filled and a little sterial gets into the cavity 5 or cavities 5 and t. Kacn the Fona process and the Srenmmg

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The shaped O-ring 2 faces a great deal of the fora from one another its inside and outside with rather thin membranes Molding material attached to hip. £ ian. can tilt this easily removed by grasping each of these ribs and the thin membrane tears apart, so that the G-Bing stands out from the crowd of the PreOgratnaterifile is separated, with any press burr material remaining on the G-Ring within the '£ oleransber «iches aein aufl.

Depending on the volume of research used the preQgrttt around the formed O-bing have one or two other ribs, which have the outer rib connected to the ring or run within the inner rib connected to the ring, with the white ribs on each side dea O-Riugee iait each other through another thin one Keahrone are connected. Both ribs can be in one Can be easily removed.

The preburrs formed during the pore process need not have the flap-shaped shape described above, although it has been shown that the hip shape facilitates tearing off; It is only important that the thickness of the PreSgratee increases in the direction of the O-Bing. This ensures dat the thinnest and thus serreiSbare to leichtesten part of Freflgrates at the connection parts of the same s de "is 0 ~ ring.

So that the thin, the thicker part of the eating burrs, which connects the O-ring, becomes as thin as possible during the research, the two parts 2 and 3 of the hair dryer feet are pressed against each other by pressing on one or the other

9 0 9 8 81/13 5 3

- 5 - 1931379

exerting pressure on both parts of the fora or by adding the weight The upper moldings "make them so big that the flat ones make one another opposite faces of the parts of the mold almost in contact come together.

The invention was in detail using the example of the formation of a O-Binge "described" but it is obvious that the Invention in shaping any other item is equally applicable.

0 9881/135

Claims (1)

1931379 f A 1 £ 1! ΐ A H S P H ί! CH B Process to form objects in a closed form consisting of several files that can be separated from one another, in which the forsi cavity is overfilled, so that the excess molding material around the leading edge the object forms a press burr around it, characterized in that dall man sur facilitate the subsequent elimination of the PreSgrate this at its Anechluflatelle to the Object as a relatively thin Mesbrane and outwards, away from the object, makes it thicker. 2. The method according to claim 1 y, characterized in that that the press burr r-.le hip formed, which with the ßegenat-.nd is connected by the thin membrane. 3 · Method according to claim 1 or 2, characterized in _F, the m & n the mold parts, the opposing surfaces are separated during dee Forsvorg & Ntot by the freflgrat from each other, firmly aneiaanderpreßt possible "eu surfaces such as, inter alia, the weiabrane of Fredgrates so thin. A * OeBchloaeent forest "which consists of several, separable files, of which at least two mutually opposite surfaces form a porous cavity, which has the" shape of the forensic counterpart, marked by the fact that the opposing smile "s the two fora parts (2, 3) outside of the forahohlrauees (1) have a PreSjr & thohlruuni (4), deseen 'would run away from the outer boundary of the? orehohlr »uaiee to the outside xuniant * 5. Geeehlaeata «fora according to claim 4 for molding of objects old * ia * r Iulsr »n and an inner 3« border "Ung, öÄduroh ^ eJCAnnseleUnet, that the * iüßnd & r 903381/135 3 BAD ORiQiNAL 19 31379 the surfaces of the two parts (2, 3) of the fora (1) also within 4er inner steps of the mold cavity (1) form a PreSgrathohlraua (4), the depth of which is inward, from the inner Limitation of the Jorntteilee lieg suniaat " & · Closed forum according to claim 4 or 3, characterized in that UaS the one of the opposite fleeing of the parts (2, 3) of the fora (1) directly on this boundary or these boundaries of the phono part are flat. 7 · Closed fora according to claim b, characterized are gekennselohnet _s dai the opposing surfaces of the parts (2, 3) of the Fora (1) designed in such a "which, if not available FreSgr let & taaterial, calibratable old touch their planar parts, these surfaces when the For" is susaaatngesettt " 8 * Closed form ßaoh one of the claims 5 6 or 7, characterized by the fact that the FreSgrathohlraua (4) on the outside of the Fonatolleale auxiliary preburr cavity is formed directly on the outside of the forate part, so that a H & uptprsSgrftthohlraim (5) is arranged on the separator outside of this kiln. 9. Closed fora according to claim 5 or C ble Θ, thereby germ-leaning »that the FreSgrathohlraua (4) on the Ittnemseite of the fora part as an auxiliary Spreegrathohlr & among other things is formed directly on the inside of the fora part and d & B a main preseSgrethohlraua (O is the distance inside this auxiliary hollow the forum parts are formed. 10. closed mold according to claim 8 or 9 »characterized in that the main and fiilfepreigrathohlraua (4, 5f 6) τοη« complementary grooves old V-föralge " Cross-section in the opposing surfaces of the 9 0 9 8 8 1/13 5 3 Parts (2, 3) of the Fora (1) are formed. 11. Form part old «inta one-piece prefridge, the ▼ the outer boundary on the molded parts "aaeh mice protrudes gefeeonstdehiiet by dal of? R" 9grett & n "a Ane" hlu§- point on as "molding the shape of" ia $ r verfe & lt isaäSig thin membrane has va & A mach auSec Aa Piake " uniiuit. 12. Forateil old a «eisietüokigeii Pr ^ eSgrat, der from the inner segrgturang of the molded part * naefe ianeti protrudes »by the fact that the? reSgravt asi at its place of attachment to the? oratell has the shape of a relatively thin heebrim *, which is inwardly beaded 13 * molded part aecö the adapters 11 or 12, thereby g * Kennseiehß. * t _# d »S the« lneückig * Frefigrat has the Geetfilt of a rib, which is old the molding by a «verjaältni« i »ÄSig thin Menbrane Terbunden. U. Forate part n * oh Anafrueh 15 »by this "Confirms that the indigent frees up an" additional elp * ou £ - knows the old ier called "ii Hipp" "ureh a comparatively thin * Meafcrane Yerbuaden 1st · 15. Format part after tinea Αφ? ABPrecne ti bie 13 » characterized in that de * iforateiX is an O ~ ring. 909881/1353