FI91112C

FI91112C - Extruder press head

Info

Publication number: FI91112C
Application number: FI916176A
Authority: FI
Inventors: Matti Sistola
Original assignee: Maillefer Nokia Holding
Priority date: 1991-12-31
Filing date: 1991-12-31
Publication date: 1994-05-10
Also published as: FI916176A0; FI916176A; FI91112B

Description

9111291112

Suulakepuristimen puristinpaaExtruder clamp head

Taman keksinnon kohteena on suulakepuristimen puristinpaa kaksikerroksisen påållysvaipan muodostami-5 seksi johtimen ympåri, johon puristinpååhan kuuluu puristinpåån runkoon asennettu matriisi låpi-menevåa johdinta vårten, ainakin kaksi runkoon asennettua jakajaa, jot-ka muodostavat ensimmaisen matriisiin johtavan, johdinta 10 ympåroivån jakokanavan, joka syottåa muovimassaa paål-lysvaipan pintakerrosta vårten, ja toisen matriisiin johtavan, johdinta ympåroivån jakokanavan, joka syottåå muovimassaa påållysvaipan sisåkerrosta vårten, jakajien jakokanaviin yhdistetyt syottokohdat 15 ainakin kahta erivåristå muovimassaa vårten, ja ristiinvaihtovålineet syottokohtien yhdiståmi-seksi valinnaisesti jakajien kuhunkin jakokanavaan.The present invention relates to a press head for forming a two-layer casing of an extruder around a conductor, the press head comprising a matrix mounted on the body of the press head, forming a conductor passing through the conductor and forming a conductor, forming at least two dividers mounted on the body. and a second distribution channel surrounding the conductor leading to the matrix, which feeds the plastic mass from the inner layer of the cover sheath,

Tållaista suulakepuristinpååtå kåytetåån varus-tettaessa johtimia vårillisillå påållysvaipoilla, joiden 20 avulla eri vaiheet ja suojamaa voidaan erottaa toisis-taan såhkoliitåntåtoisså. Påållysvaippa voi tålloin olla yksivårinen tai varustettu yhdellå tai useammalla erivå-risellå raidalla. Halutun vårinen påållysvaippa puriste-taan yleenså johtimen perusvaipan påålle, joka aikaan-25 saadaan samassa puristusvaiheessa.Such an extruder head is used to provide conductors with colored sheaths, by means of which the different phases and the protective earth can be separated from one another in the electrical connection terminals. The cover can then be solid in color or provided with one or more stripes of different colors. The sheath of the desired color is generally pressed over the base sheath of the conductor, which is obtained in the same pressing step.

US-patenttijulkaisuissa 4,761,129 ja 4,832,960 ja EP-hakemusjulkaisussa 0 277 111 on esitetty erilaisia laitteistoja, joilla voidaan påållyståå johtimia erivå-risillå påållysvaipoilla. Kaikille on yhteistå se, ettå 30 suulakepuristimen puristinpååhån johdetaan kaksi erivåristå muovimassavirtaa, joista toinen puristetaan vaipan pintakerrokseksi ja toinen puristetaan alapuoliseksi kerrokseksi. Puristinpåån ulkopuolelle on asennettu vaihtoventtiili, joka sijaitsee muovimassavirtojen vir-35 tausteillå ja jota kiertåmållå virtaustiet voidaan vaih- 2 taa ristikkåin, niin ettå aikaisemmin vaipan pinnalle tuleva muovimassa saadaan vaihtamaan paikkansa alapuo-lelle tulevan muovimassan kanssa, jolloin jålkimmåinen nyt muodostaa vaipan pintakerroksen.U.S. Patent Nos. 4,761,129 and 4,832,960 and EP Application Publication 0 277 111 disclose various apparatus for coating conductors with different colored sheaths. What everyone has in common is that two different colored plastic pulp streams are fed to the press head of the extruder 30, one of which is pressed into the surface layer of the jacket and the other into the bottom layer. A reversing valve is mounted outside the press head, which is located at the flow paths of the plastic mass flows and by which the flow paths can be crossed so that the plastic mass previously on the surface of the jacket can be replaced with the plastic mass below it.

5 US-julkaisujen mukaisten laitteistojen epåkohtana on se, ettå mikåli yksivåristen pintakerrosten asemesta halutaan muodostaa vaippa, jonka pintakerroksessa on yksi tai useampia erivårisiå raitoja, on koko puristin-påå purettava ja jakajat suulakkeineen vaihdettava toi-10 siin. Tåmå vuorostaan vaatii linjan pysåyttåmistå, påål-lystettåvån johtimen katkaisua ja uudelleen pujottamista linjaan ja hidastaa ja monimutkaistaa siten huomattavas-ti påållystetyn johtimen tuotantoa.A disadvantage of the apparatus according to the US publications is that if, instead of monochromatic surface layers, it is desired to form a jacket with one or more stripes of different colors in the surface layer, the entire press head must be disassembled and the manifolds with nozzles replaced. This, in turn, requires stopping the line, cutting and re-threading the conductor to be coated, and thus significantly slowing down and complicating the production of the coated conductor.

EP-hakemusjulkaisussa on tåmå epåkohta yritetty 15 vålttåå kåyttåmållå johtimen påållyståmistå vårten kahta ensiopuristinta ja kahta toisiopuristinta, jotka syottå-våt kahta vaihtoventtiiliå. Tållaisen laitteiston huo-mattavana epåkohtana on puristimien suuri måårå ja laitteiston siitå johtuva kalleus.The EP application has attempted to avoid this disadvantage by using 15 primary presses and two secondary presses which feed the two diverter valves. A significant disadvantage of such equipment is the large number of presses and the resulting high cost of the equipment.

20 Tåmån keksinnon tarkoituksena on aikaansaada suu- lakepuristimen puristinpåå, joka vålttåå edellå mainitut epåkohdat ja joka on rakenteeltaan yksinkertainen ja mahdollistaa johtimen påållysvaipan pintakerroksen vårin vaihtamisen samoin kuin pintakerroksen raidoittamisen 25 linjaa pysåyttåmåttå. Tåmå tarkoitus saavutetaan keksin non mukaisella puristinpåållå, jolle on tunnusomaista se ettå jakajien jakokanavat on jaettu johtimen ympåryssuunnassa erillisiin vyohykkeisiin, ettå ensimmåisen jakokanavan ja toisen jakoka-30 navan vastaavat jakokanavavyohykkeet on puristinpåån rungossa yhdistetty parittain diametraalisesti vastak-kaisiin jakokanavavyohykkeisiin erillisillå syottokana-villa, ja - ettå puristinpåån rungossa on ensimmåinen 35 vaihtoventtiilikara ja toinen vaihtoventtiilikara syot-The object of the present invention is to provide an extruder at the press head which avoids the above-mentioned drawbacks and which has a simple structure and allows the color of the surface layer of the conductor sheath to be changed as well as the striping of the surface layer without stopping the line. This object is achieved by a press head according to the invention, characterized in that the distributor distribution channels are divided into separate zones in the circumferential direction of the conductor, that the respective distribution channel zones of the first distribution channel and the second distribution channel that the body of the press head has a first 35 diverter valve stem and a second diverter valve stem

IIII

91112 3 tokanavien yhdistamiseksi parittain valinnaisesti muovi-massojen syottokohtiin.91112 3 for connecting pairs of channels, optionally in pairs, to the inlets of plastic masses.

Keksinnon mukainen puristinpaå perustuu siihen ajatukseen, ettå johtimen påållysvaipan pinta- ja ala-5 kerrokset muodostavat suulakkeet puristinpååsså jaetaan eri vyohykkeisiin, joita syotetåån diametraalisesti vas-takkaisina pareina eri syottokanavien kautta, joita voi-daan lisåksi vaihtaa ristikkåin. Tållå tavalla saadaan jo kahdella erivårisellå muovimassalla kolme erilaista 10 pintakerrosta påållysvaippaan, nimittåin kaksi våriltåån erilaista yksivåristå pintaa ja yksi raidoitettu pinta.The press head according to the invention is based on the idea that the nozzles forming the surface and lower 5 layers of the conductor sheath at the press head are divided into different zones, which are fed in diametrically opposite pairs via different feed channels, which can additionally be exchanged. In this way, already with two different colored plastic masses, three different 10 surface layers are obtained for the cover, namely two monochromatic surfaces of different colors and one striped surface.

Puristinpåån erås huomattava etu on lisåksi se, ettå keksinnon yksinkertainen toteutusmuoto vaatii liså-laitteina tavanomaiseen kaksikerroksisen påållysvaipan 15 muodostavaan puristinpååhån nåhden vain syottokanavilla varustetun syottoholkin ja kaksi pienikokoista venttii-likaraa, jotka kaikki voidaan asentaa puristinpåån si-såån sen kokoa suuremmitta lisååmåttå.In addition, a considerable advantage of the press head is that the simple embodiment of the invention requires, as accessories, only a large inlet sleeve with two feed channels and two small valve-ducts, which can all be disassembled, in addition to the conventional press head forming the two-layer casing 15.

Keksintoå selitetåån tarkemmin seuraavassa viita-20 ten oheisiin piirustuksiin, joissa kuvio 1 esittåå kaavamaisesti keksinnon mukaisen puristinpåån toimintaperiaatetta, kuviot 2-4 esittåvåt poikkileikkauksena kolmea puristinpåållå valmistettua erilaista vaipparakennetta, 25 kuviot 5 ja 6 esittåvåt keksinnon eråån edullisen toteutusmuodon mukaista puristinpååtå aksiaalileikkauk-sena ja vastaavasti leikkauksena pitkin kuviossa 5 ole-vaa viivaa VI-VI, kuvio 7 esittåå syottoholkkia sivulta nåhtynå, 30 kuvio 8 esittåå syottoholkin syottokanavistoa tasoon levitettynå, kuvio 9 esittåå ensimmåistå jakajaa sivulta nåhtynå, kuvio 10 esittåå ensimmåisen jakajan jakokanavaa 35 tasoon levitettynå, 4 kuvio 11 esittåå toista jakajaa sivulta nåhtynå, kuvio 12 esittåå toisen jakajan jakokanavaa ta-soon levitettynå, kuvio 13 esittåå perusjakajaa sivulta nåhtyna, 5 kuvio 14 esittaå perusjakajan suulakepintaa ta- soon levitettynå, ja kuvio 15 esittåå venttiilikaraa sivulta nåhtynå.The invention will now be described in more detail with reference to the accompanying drawings, in which Figure 1 schematically shows the principle of operation of a press head according to the invention, Figures 2-4 show in cross-section three different section along the line VI-VI in Fig. 5, Fig. 7 shows the intake sleeve as seen from the side, Fig. 8 shows the intake sleeve of the intake manifold when flattened, Fig. 9 shows the first divider as seen from the side, Fig. 10 shows the first divider, Fig. 10 a second distributor seen from the side, Fig. 12 shows the distribution channel of the second distributor applied in a plane, Fig. 13 shows a basic distributor seen from the side, Fig. 14 shows the nozzle surface of the basic distributor applied in a plane, and Fig. 15 shows a vent brick spindle seen from the side.

Keksinnon roukainen puristinpåå kåsittåå pååosil-taan rungon 1, syottoholkin 10, ensimmåisen jakajan 20, 10 toisen jakajan 30, perusjakajan 40 ja vaihtoventtiilit 50, jotka on asennettu keskenåån sama-akselisesti run-koon. Perusjakajassa on aksiaalinen låpimenoreika 41 påållystettåvåå johdinta 60 vårten.The crimped press head of the invention essentially comprises a body 1, a feed sleeve 10, a first distributor 20, a second distributor 30, a basic distributor 40 and reversing valves 50 mounted coaxially with each other in the body. The basic distributor has an axial through hole 41 along the conductor 60 to be coated.

Rungossa on syottokohta 2 johtimen perusvaipan 15 61, kuv. 2, muodostavaa muovimassaa vårten. Syottokohta 2 on yhdistetty syottoholkin 10 ja jakajien 20, 30 låpi ulottuvien reikien 3 kautta perusjakajassa 40 olevaan sinånså tunnettuun syottokanavaan 41a, joka muodostaa rungossa olevaan matriisiin 4 johtavan suulakkeen perus-20 vaipan 61 muodostamiseksi.The body has a feed point 2 in the base sheath 15 61 of the conductor, fig. 2, forming a plastic mass. The feed point 2 is connected through holes 3 extending through the feed sleeve 10 and the dividers 20, 30 to a feed channel 41a known per se in the base distributor 40, which forms a nozzle leading to the matrix 4 in the body to form the base 61 casing.

Rungossa on myos pesåt kahta venttiilikaraa 51, 51' vårten, jotka on asennettu aksiaalisesti liukuvasti runkoon sen akselin suuntaisesti 90° pååhån toisistaan. Kummassakin karassa on kaksi låpimenevåå syottoreikaå 25 52, 53 ja vastaavasti 52', 53', jotka karan tietysså asennossa ovat erikseen yhteydesså kahteen rungossa olevaan tulokanavaan 5, 6 ja vastaavasti 5', 6' kahta purist imista syotettyå erivåristå muovimassaa vårten. Kummassakin karassa on myos toinen pari låpimeneviå syotto-30 reikiå 54, 55 ja vastaavasti 54', 55', jotka karan aksiaalisesti siirretysså asennossa sijaitsevat tulokana-vien 5, 6 ja 5', 6' kohdalla ja kytkevåt tulokanavat ristikkåin. Karat ovat liikuteltavissa aksiaalisesti painevåliainekåyttoisten voimaelimien 7 avulla.The body also has sockets with two valve stems 51, 51 'which are axially slidably mounted on the body 90 ° apart along its axis. Each mandrel has two through-feed feed holes 25 52, 53 and 52 ', 53', respectively, which in a certain position of the mandrel are separately connected to the two inlet channels 5, 6 and 5 ', 6', respectively, for two different colored plastic masses fed from the presses. Each mandrel also has a second pair of through-intake holes 54, 55 and 54 ', 55', respectively, located in the axially displaced position of the mandrel at the inlet passages 5, 6 and 5 ', 6' and connecting the inlet passages crosswise. The spindles can be moved axially by means of force elements 7 driven by a pressure medium.

35 Syottoholkin 10 ulkopinnalla on kaksi ryhmåå li 91112 5 erillisia syottokanavia 11, 11' ja vastaavasti 12, 12'. Syottokanavaryhmåt on siirretty 90° verran toistensa suh-teen. Ensimmåisen syottokanavaparin keskikohdat sijait-sevat rungossa olevien tulokanavien 5, 6 kohdalla ja 5 toisen syottokanavaparin keskikohdat sijaitsevat rungon toisen tulokanavaparin 5', 6' kohdalla, kuvio 8. Kumman-kin syottokanavaparin påisså on holkin låpi ulottuvat syottoreiåt 13, 14 ja 13', 14' ja vastaavasti 15, 16 ja 15', 16'.The outer surface of the feed sleeve 10 has two separate feed channels 11, 11 'and 12, 12', respectively, in groups li 91112 5. The input channel groups are offset by 90 ° relative to each other. The centers of the first pair of inlet ducts are located at the inlet ducts 5, 6 in the body and the centers of the second pair of inlet ducts are located at the second inlet duct pair 5 ', 6' of the body, Fig. 8. The ends of each pair of inlet ducts have 'and 15, 16 and 15', 16 ', respectively.

10 Ensinunåisesså jakajassa 20 on jakokanava 21, joka muodostaa sinånså tunnetun, matriisiin 4 johtavan suu-lakkeen påållysvaipan 62 pintakerroksen 62a, kuv. 2, muodostamiseksi. Jakokanava sijaitsee kahden syottohol-kissa olevan, eri ryhmiin kuuluvan syottokanavan 11, 12 15 syottoreikien 13, 14, 15 ja 16 kohdalla, kuv. 10. En-siminåisesså jakajassa on myos låpimenevåt syottoreiåt 13', 14', 15' ja 16' syottoholkin kahden muun syottokanavan 11', 12' påisså olevien vastaavien syottoreikien kohdalla.The first distributor 20 has a distribution channel 21 which forms the surface layer 62a of the cover jacket 62 of the nozzle leading to the matrix 4, which is known per se. 2, to form. The distribution channel is located at the supply holes 13, 14, 15 and 16 of the two supply channels 11, 12 15 in the feeding sleeve, belonging to different groups, fig. 10. The first divider also has through-going feed holes 13 ', 14', 15 'and 16' at the respective feed holes at the ends of the other two feed channels 11 ', 12' of the feed sleeve.

20 Toisessa jakajassa 30 on jakokanava 31, joka muo dostaa sinånså tunnetun, matriisiin 4 johtavan suulak-keen johtimen påållysvaipan 62 alakerroksen 62b, kuv. 2, muodostamiseksi. Jakokanava sijaitsee ensinunåisesså jakajassa olevien syottoreikien 13', 14', 15' ja 16' koh-25 dalla, kuv. 12.The second divider 30 has a distribution channel 31 which forms the lower layer 62b of the conductor sheath 62 of the nozzle leading to the die 4, which is known per se. 2, to form. The distribution channel is located at the feed holes 13 ', 14', 15 'and 16' in the first distributor, fig. 12.

Ensimmåisen ja toisen jakajan 20, 30 jakokanavat 21 ja 31 on edellå esitetyn rakenteen avulla jaettu nel-jåån tasasuuruiseen vyohykkeeseen 21/1, 21/11, 21/III ja 21/IV ja vastaavasti 31/1, 31/11, 31/III ja 31/IV. Tål-30 loin ensimmåisen jakajan kaksi diametraalisesti vastak-kaista jakokanavavyohykettå 21/1 ja 21/III on yhteydesså syottoholkin ensimmåiseen ryhmåån kuuluvaan syottokana-vaan 11 ja siten myos rungon toisen tulokanavaryhmån tulokanavaan 5. Ensimmåisen jakajan molemmat muut dia-35 metraalisesti vastakkaiset jakokanavavyohykkeet 21/11 ja 6 21/IV ovat vastaavasti yhteydesså syottoholkin syottoka-navaan 12 ja rungon tulokanavaan 5'. Vastaavasti ovat toisen jakajan 30 kaksi diametraalisesti vastakkaista jakokanavaa 31/1 ja 31/III yhteydessa syottoholkin syot-5 tokanavaan 11' ja rungon tulokanavaan 6 ja molemmat muut diametraalisesti vastakkaiset jakokanavat 31/11 ja 31/IV yhteydessa syottoholkin syottokanavaan 12' ja rungon tulokanavaan 6'.The distribution channels 21 and 31 of the first and second dividers 20, 30 are divided into four equal zones 21/1, 21/11, 21 / III and 21 / IV and 31/1, 31/11, 31 / III, respectively, by means of the structure shown above. and 31 / IV. Here, the two diametrically opposite distribution channel zones 21/1 and 21 / III of the first divider are connected to the input channel 11 belonging to the first group of the input sleeve and thus also to the input channel 5 of the second input channel group of the body. 11 and 6 21 / IV are in communication with the inlet duct 12 and the inlet duct 5 'of the body, respectively. Respectively, the two diametrically opposed distribution channels 31/1 and 31 / III of the second divider 30 are connected to the input channel 11 'of the input sleeve 5' and the body inlet channel 6 and the other two diametrically opposite distribution channels 31/11 and 31 / IV are connected to the input channel 12 'of the input sleeve '.

Puristinpåån toimintaa selitetåån seuraavassa 10 viitaten kuviossa 1 esitettyyn periaatteelliseen raken-nekaavioon ja kuviossa 4 esitettyyn paallystetyn johti-men poikkileikkaukseen. Niissa oletetaan, ettå tulokana-viin 5, 5' syotetåan samaa varia olevaa muovimassaa ja tulokanaviin 6, 6' syotetåan toista varia olevaa muovi-15 massaa esittåmåttå jåtetyistå puristimista. Kun tålloin venttiilikarat sijaitsevat kuviossa 1 esitetyisså asen-noissa (kara 51 sisååntyonnettynå ja kara 51' ulosvedet-tynå), saadaan påållysvaipan pintakerrokseen 62a synty-måån kaksi diametraalisesti sijaitsevaa erivåristå rai-20 taa 62a'. Påållysvaipan alakerros 62b koostuu vuorotte-levista erivårisistå osista.The operation of the press head will be explained in the following 10 with reference to the basic construction diagram shown in Fig. 1 and the cross section of the baled conductor shown in Fig. 4. They assume that the inlet ducts 5, 5 'are fed a plastic mass of the same color and the inlet ducts 6, 6' are fed a mass of plastic 15 of the same color from the left presses. When the valve stems are then located in the positions shown in Fig. 1 (stem 51 pushed in and stem 51 'pulled out), two diametrically located strips 62a' of different colors are created in the surface layer 62a of the cover jacket. The lower layer 62b of the cover consists of alternating colored parts.

Kun toinen venttiilikara 51' siirretåån kuviossa 1 esitetystå asennosta ulosvedettyyn asentoon, saadaan påållysvaippa, jonka pintakerros 62a on koko pinnaltaan 25 samanvårinen, kuvio 2. Kun toinen venttiilikara 51 siirretåån kuviossa 1 esitetystå asennosta sisååntyonnettyyn asentoon ja venttiilikara 51' jåtetåån esitettyyn asen-toon, saadaan påållysvaippa, jonka pintakerros 62a on koko pinnaltaan vaihtunut toisenvåriseksi, kuvio 3.When the second valve stem 51 'is moved from the position shown in FIG. a cover whose surface layer 62a has changed to a different color over its entire surface, Fig. 3.

30 Huomataan, ettå johtimen påållysvaipan kolme eri vårivaihtoehtoa aikaansaadaan keksinnon mukaisella pu-ristinpåållå tarvitsematta pysåyttåå påållystyslinjaa ja tarvitsematta purkaa puristinpååtå. Kaikki vålineet saadaan asennetuiksi pienikokoiseen yhtenåiseen rakentee-35 seen.It will be appreciated that the three different color options for the conductor sheath are provided by the press head according to the invention without the need to stop the coating line and without the need to disassemble the press head. All devices can be installed in a small, uniform structure.

IIII

91112 791112 7

Piirustukset ja niihin liittyva selitys on tar-koitettu vain havainnollistamaan keksinnon ajatusta. Yksityiskohdiltaan voi keksinnon mukainen puristinpaa vaihdella patenttivaatimusten puitteissa. Vaikka kuva-5 tussa toteutusmuodossa molemmat erivåriset muovimassat johdetaan puristinpaån runkoon kahdessa kohdassa 5, 6 ja 5', 6' on tietenkin mahdollista syottaå molemmat saman-våriset tulokohdat samasta varilåhteestå. On myos mahdollista tarvittaessa lisåtå vaihtoventtiilien ja jaka-10 jien mååraå ja jakaa jakajien jakokanavat useampiin vyo-hykkeisiin.The drawings and the related explanation are only intended to illustrate the idea of the invention. The details of the press head according to the invention may vary within the scope of the claims. Although in the illustrated embodiment both different colored plastic masses are fed to the press head body at two points 5, 6 and 5 ', 6', it is of course possible to feed both of the same colored input points from the same shadow source. It is also possible, if necessary, to increase the number of diverter valves and manifolds and to divide the manifolds of the manifolds into several zones.

Claims

A press head for an extruder for forming a double-coated cover jacket (62) around a conductor 5 (60), comprising a press head - a 1 press head's body (1) mounted matrix (4) for a continuous conductor, - at least two in the body mounted Distributors (20, 30) forming a first conductive matrix duct, 10 conductor enclosing distribution duct (21), which feeds plastic pulp for the coating layer (62a) of the coating material, and a second conductor enclosing distribution duct (31) which feeds plastic pulp for the coating layer's inner layer (62b), 15. with the feed distribution channels (5, 6) connected to the distribution channels of at least two different colored plastic masses, and - that the distribution channels (21, 30) of the distribution channels (21, 31) are divided in the circumferential direction of the conductor (60) into separate zones (21 / I-21 / IV, 31 / I-31 / IV), 25. that the first the corresponding distribution channel zones of the dividing channel (21) and other distribution channel (31) are connected in pairs with diametrically opposed distribution channel zones by means of separate feed channels (11, 12, 11 ', 12') and 30 in the press housing. (1) there is a first reversing valve spindle (51) and a second reversing valve spindle (51 ') for connecting the feed ducts selectively in pairs with the feed bars of the plastic materials (5, 6, 5', 6 '). 12

2. A press head according to claim 1, in the spring frame (1) there is a hollow-like base distributor (40) with an axial passage (41) for a blank conductor (60) and with a distribution channel (41a) for opening in the matrix (4). a plastic pulp (61) forming a pulp, characterized in that it understands and the second distributor (20, 30) is formed by coaxially located distribution holes with the basic distributor (40) and that the distribution channel zones (21 / I-21 / IV, 31 / I-31 / IV) are pairwise connecting feed channels (11, 12, 11 ', 12 #) located on the surface of a distributor coaxially surrounding feed hole (10).

3. The print head of claim 2 may be characterized in that the feed channels (11, 12, 11 #, 12 ') in the feed hole (10) comprise an understandable feed channel pair (11, 11'), our one feed channel (11). by means of feed holes (13, 14) extending through the feed hole (10) connected to the understandable distributor (20) two diametrically opposite distribution channel zones (21/1, 21 / III) 20 and other feed channel (11 ') are by means of the feed hole (10) and understanding the distributor (20) extending feed holes (13 ', 14') connected to the second distributor (30) two diametrically opposed distribution channel zones (31/1, 31 / III), and a second supply channel pair (12, 12 '), spring one feed channel (12) is provided by means of feed holes (15, 16) extending through the feed hole (10, 16) with the understanding of the distributor (20) two other diametrically opposed distribution channel zones (21/11, 21 / IV) and other feed channel (12 '). ) by means of the feed channel (10) and understand the distributor feed (20) shells (15 ', 16') connected to the second distributor (30) two corresponding diametrically opposed distribution channel zones (31/11, 31 / IV).

4. A press head according to claim 3, characterized in that in the body of the press head (1) li 91112 13 is provided with the single feeding channel (11, 11 ', 12, 12') of the feed head (4, 5 '). 6, 6 ') for plastic pulp, each of the feed duct pairs (11, 11', 12, 12 ') of the feed duct being located one after the other in the axial direction of the feed duct.

5. A press head as claimed in claim 4, k 3 η notwithstanding that in the body of the press head (1) is axially slidably mounted a first reversing valve pin part (51) with two continuous feed holes (52, 53) and two cross feed holes ( 54, 55) which, depending on the spindle's position, connect the inlets (5, 6) for different plastic masses directly or crosswise with the first feeding channel pair (5, 6) and also axially slidably mounted a second reversing valve spindle (51 ') with two continuous feed holes (52 ', 53') and two crosswise feed holes (54 ', 55') which, depending on the spindle's location, connect the inlets (5 ', 6') for different plastic masses directly or cross with the second feed channel pair's feed hole (5 '). , 6 ').