SE190098C1

SE190098C1 -

Info

Publication number: SE190098C1
Authority: SE
Publication date: 1964-01-01

Description

KLASS INTERNATIONELLSVENSK B 29 b39 al:5/04 PATENT- OCH REGISTRERINGSVERKET Ans. 11 359/1152 inkom den 31/12 1952 utlagd den 12/6 1962 K G LUNDH, SCHAAN, LIECHTENSTEIN Anordning for i huvudsak kontinuerlig utmatning av material vaxelvis fun tva kolveylindermekanismer me deist hydrauliskt drivna pumpdon Foreliggande uppfinning avser en anordning for kontinuerlig utmatning av material i syn- nerhet for kontinuerlig pressgjutning av fore- mal sasom lister, slang o. dyl. Vid utpressning av konsttarmmassa eller annat material sasom gummi, gelatin, yiror o. dyl. i t. ex. rorform astadkommer varje fOrandring i trycket en forandring i rOrets diameter. Vidare astad- kommer en andring ay utstromningshastigheten en andring av spanningen i materialet mellan munstycket och den fOljande torkbanan, vilket medfor, att den frampressade kroppen slites av eller att slingor uppsta. CLASS INTERNATIONAL SWEDISH B 29 b39 al: 5/04 PATENT AND REGISTRATION AGENCY Ans. 11 359/1152 was received on 31/12 1952 issued on 12/6 1962 KG LUNDH, SCHAAN, LIECHTENSTEIN Device for substantially continuous discharge of material alternately with two piston cylinder mechanisms with deist hydraulically driven pumps The present invention relates to a device for continuous discharge of material in especially for continuous die casting of molds such as moldings, hose and the like. When squeezing artificial intestinal mass or other material such as rubber, gelatin, yiror and the like. and e.g. tube shape, each change in pressure causes a change in the diameter of the tube. Furthermore, a change in the outflow velocity causes a change in the tension in the material between the nozzle and the following drying path, which causes the pressed body to wear off or loops to form.

For astadkommande av mojligast jamn produktion ha manga anordningar tidigare foreslagits och fOreliggande uppfinning bygger pa en typ besthende av tvenne kolveylindermekanismer anstatna genom ledningar till en ventil, som ar sa inrattad, att den hailer den hogsta trycket uppvisande ledningen ansluten till ett materialutlopp, varvid kolv-eylindermekanismerna aro anordnade att vaxelvis till-fora material till utloppet och anordnade att fyllas under sina overksamma slag genom en ytterligare koly-cylindermekanism ansluten via en dubbel bakslagsventil till fOrstn5.mnda kolv-cylindermekanismers utmatningsledningar, och varvid vane kolv-cylindermekanism är forbunden med var sin hydrauliskt driven kolv-cylinderanordning genom en gemensam kolvstang saint varvid fOrstnamn.da kolv.cylindermekanismers kolvstanger aro forsedda med utbuktningar for samverkan med kontaktorgan fiir manovrering av de de hydrauliska anordningarna drivande pumpdonen. Sasom papekats Or det av synnerlig vikt att sAvOl materialets utmatningshastighet som homogenitet bibehalles konstanta under hela driftstiden, dvs. aven under de tidsintervall, da utmatningsarbetet Overgar frau den ena: kolv-cylindermekanismen till den andra. Att en dylik driftsbetingelse kan uppratthallas Ar vasentligen beroende pa att material tillfores Dupl. kl. 39 a4: 1/06; 39 a4: 3/06 fOrstn5.mnda kolveylindermekanismer under konstant tryck. Foreliggande uppfinning loser detta problem pa. sadant satt, att utbuktningarna aro sa placerade pa tillhorande kolvstanger, att vid slutet av endera kolvrorelsen i utpressningsriktningen den for tillfallet verksamma kolystangens fors ta utbuktning paverkar den ena kontakten f8r igangsattning av den fOr tillfallet overksamma kolv-cylindermekanismens pumpdon och efter ytterligare kolvrOrelse hos forstnamnda kolvstang den andra utbuktningen paverkar aystangnings= kontakten for de egna pumpdonen och vice versa, varvid den ytterligare kolv-cylindermekanismens hydrauliska koly-cylinderanord, ning via en ventilanordning standigt star i forbindelse med den for tillfallet tryck uppvisande ledningen. Genom en dylik anordning kommer den material tillforande ytterligare kolv-eylindermekanismen att uppvisa konstant arbetstryck och tillfOrsakra jamn materialtillforsel till forstnamnda kolvcylindermekanismer. In order to achieve the most uniform production possible, many devices have previously been proposed and the present invention is based on a type consisting of two piston cylinder mechanisms engaged by conduits to a valve which is so arranged that it holds the highest pressure having the conduit connected to a material outlet, the piston the cylinder mechanisms are arranged to alternately supply material to the outlet and are arranged to be filled during their idle strokes by an additional carbon cylinder mechanism connected via a double check valve to the discharge lines of the first piston-cylinder mechanisms, and the piston-cylinder mechanism being used hydraulically driven piston-cylinder device by means of a common piston rod saint, the piston rods of the first piston-cylinder mechanisms being provided with bulges for co-operation with contact means for maneuvering the pumps driving the hydraulic devices. As is the case, it is of particular importance that the discharge rate of the material as homogeneity be maintained constant throughout the operating time, ie. even during the time intervals, when the discharge work passes from one: piston-cylinder mechanism to the other. The fact that such an operating condition can be maintained is essentially dependent on material being supplied to Dupl. at 39 a4: 1/06; 39 a4: 3/06 First piston cylinder mechanisms under constant pressure. The present invention solves this problem. in such a way that the bulges are so placed on the associated piston rods that at the end of either piston movement in the squeezing direction the bulge of the incidently acting carbon rod affects one contact before starting the incidentally inactive piston-cylinder mechanism and the piston actuator the second bulge affects the shut-off contact for the own pumps and vice versa, whereby the hydraulic carbon-cylinder device of the further piston-cylinder mechanism, via a valve device, constantly stands in connection with the line having the occasional pressure. By means of such a device, the material supplying additional piston-cylinder mechanism will exhibit constant working pressure and cause even material supply to the first-mentioned piston-cylinder mechanisms.

Med uppfinningen vinnes aven den fordelen, att ieke flagon sarskild hydraulisk drivanordning fordras for namnda ytterligare kolv-cylindermekanisms hydrauliska kolv-cylinderanordning och denna erhaller alltid ett till forstnamnda kolv-cylindermekanismer avpassat materialmatningstryck. The invention also gains the advantage that no special hydraulic drive device is required for the hydraulic piston-cylinder device of the said additional piston-cylinder mechanism and this always obtains a material supply pressure adapted to the first-mentioned piston-cylinder mechanisms.

Uppfinningen skall narmare beskrivas med hanvisning till en pA bifogade ritning schematiskt visade utfOringsform. The invention will be described in more detail with reference to a diagram schematically shown in the accompanying drawing.

Den visade anordningen bestar av tvenne materialutpressningscylindrar 1, 2 var och en genom ledningar forbunden med var sitt tilllopp till en ventil 3, vars utlopp 4 stir i forbindelse med ett formpressningsmunstycke (icke visat). Ventilen 3 ar sa inrattad, att den hailer den hogsta trycket uppvisande ledningen ansluten till materialutloppet 4. Via en rorledning 5 och en avstangningsventil 6 tillfores material till en forradscylinder 7, vars 2- . - utlopp kommunicerar med en dubbel bakslagsventil 8, vars bada utlopp dro anslutna. till cylindrarnas 1, 2 utlopp. I vardera cylindern 1, 2 aro kolvar och kolvstanger 9, 10 resp. anordnade. I cylindern 7 aro avenledes en kolv med kolvstang 11 anordnade. For drivning av namnda kolvmekanismer dro tvenne hydraulpumpar 12, 13 anordnade, vilka drivas av var sin motor 14, 15 resp. I en behaltare 16 f5rvaras hydraulvatska 17. Fran punal parna 12, 13 ga rorledningar 18, 19 resp. till cylindrar 20, 21. Till ledningen 18 är en grenledning 22 ansluten och till ledningen 19 en grenledning 23. Grenledningarna 22, 23 aro anslutna till en ventilanording 24, som kommunicerar med en cylinder 25. I vardera cylindern. 20, 21 Riper en med kolvstangen 9, 10 resp. ansluten kolv. I cylindern 25 Idper likasa en kolv, som Sr forbunden med kolvstangeri 11. Pa ledningarna 18, 19 finnas med varandra gangade avstangningsventiter 26, 27 resp. for reglering av anordningens arbetshastighet. Ansluten till ledningen 18 finnes en. Overtrycksventil 28 och till ledningen 19 likasâ en overtrycksventil 29. The device shown consists of two material pressing cylinders 1, 2 each connected by lines to each of its inlets to a valve 3, the outlet 4 of which is connected in connection with a molding nozzle (not shown). The valve 3 is so arranged that it holds the highest pressure line connected to the material outlet 4. Via a pipe line 5 and a shut-off valve 6, material is supplied to a storage cylinder 7, the 2- of which. outlet communicates with a double non-return valve 8, the two outlets of which are connected. to the outlets of the cylinders 1, 2. In each cylinder 1, 2 there are pistons and piston rods 9, 10 resp. arranged. In the cylinder 7 a piston with piston rod 11 is arranged. For driving said piston mechanisms, two hydraulic pumps 12, 13 were arranged, which are each driven by a motor 14, 15 and 15, respectively. In a container 16, hydraulic fluid 17 is stored. From the punal pairs 12, 13, pipes 18, 19 resp. to cylinders 20, 21. To the line 18 a branch line 22 is connected and to the line 19 a branch line 23. The branch lines 22, 23 are connected to a valve device 24, which communicates with a cylinder 25. In each cylinder. 20, 21 Scratch one with the piston rod 9, 10 resp. connected piston. In the cylinder 25 Idper like a piston, which Sr connected to piston rod 11. On the lines 18, 19 there are interconnected shut-off valves 26, 27 resp. for regulating the working speed of the device. Connected to line 18 is one. Overpressure valve 28 and to the line 19 as well as an overpressure valve 29.

Andlaget for kolven i cylindern 1 Sr betecknat med 30, for kolven i cylindern. 20 med 31, cylindern 2 med 32 och i cylindern 21 med 83. ph golystangerna 9, 10 aro kontaktpaverkningsorgan i form av knaster 34, 35, 36, 37, 38, 39 anordnade for samverkan med kontaktdon 40, 41, 42, 43, 44, 45. The abutment of the piston in the cylinder 1 Sr denoted by 30, for the piston in the cylinder. 20 with 31, the cylinder 2 with 32 and in the cylinder 21 with 83. the goly rods 9, 10 are contact actuating means in the form of cams 34, 35, 36, 37, 38, 39 arranged for cooperation with connectors 40, 41, 42, 43 44, 45.

For att fOrhindra fOrstoring av anordningen. Aro cylindrarna 20, 21 och 25 forsedda med s. k. sakerhetsledningar 46, 47 och 48 resp., vilka avleda hydraulvatska till behallaren 16 I handelse nagondera kolven skulle bringas att flirskjuta sig utanfor sitt yttre arbetsandlaze 49, 50 och 51, varvid kolvarna gâ forbi oppningarna till namnda ledningar och kolvrorelsen avstannar. To prevent enlargement of the device. The cylinders 20, 21 and 25 are provided with so-called safety lines 46, 47 and 48, respectively, which divert hydraulic fluid to the container 16. In trade, the piston would be caused to flutter outside its outer working shaft 49, 50 and 51, the pistons passing the openings to named lines and the piston movement stops.

Anordningen fungerar ph foljande salt. Det antages, att genom ledningen 5 cylinder. 7 fyllts med material och ventilen 6 stangts och. hydraulpumpen 12 drives av sin motor 14. Det antages vidare, att cylindrarna 1 och 2 och tillhorande materialtransportledningar innehdlla Hydraulvatska pumpas genom ledningen 18 till cylindern. 20 och genom grenledningen 22 och ventilanordningen 24 till cylindern 25. Ventilanordningen 21 Sr sadan, att den ansluter den av grenledningarna 22, 23 till cylinder. 25, vilken for tillfallet uppvisar det storsta trycket. Kolven i cylindern 20 pressar genom kolvstangen 9 kolven i cylindern 1 mot andlaget 30 och kolven i cylindern 25 pressar genom kolvstangen 11 kolven i cylindern 7 i en pressgjutmaterialet utpressande riktning. Det tryck (c :a 400 at.), som astadkomraes i cylindern 1, är avsevart storre an det tryck (ca: 20 at), som astadkommes i cylindern 7, varav foljer, att ventilen 8 kommer att avstanga forbindelsen mellan cylinder 1 och 7 och halla forbindelsen mellan 2 och 7 oppen, sasom visat. Vidare hailer genom trycket fran cylindern 1 ventilen 3 forbindelsen med cylindern 2 stangd. Pressmaterial kommer alltsa att utpressas av cylindern 1 genom utloppet 4. Under detta skede pressas genom cylindern 7 material in i cylindern 2, som darvid fylles under forskjutning av kolvarna pa kolvstangen 10 mot andlaget 33; fyllningen motverkas icke pa nagot satt, enar pumpaggregatet 13, 15 Sr urkopplat. Nar cylindern Sr fylld, paverkar knastret 35 kontaktdonet 41, varvid en icke visad signallampa tandes. The device works ph following salt. It is assumed that through the line 5 cylinder. 7 filled with material and valve 6 closed and. The hydraulic pump 12 is driven by its motor 14. It is further assumed that the cylinders 1 and 2 and associated material transport lines containing Hydraulic fluid are pumped through the line 18 to the cylinder. 20 and through the branch line 22 and the valve device 24 to the cylinder 25. The valve device 21 Sr so that it connects it of the branch lines 22, 23 to cylinder. 25, which incidentally has the greatest pressure. The piston in the cylinder 20 presses through the piston rod 9 the piston in the cylinder 1 against the abutment 30 and the piston in the cylinder 25 presses through the piston rod 11 the piston in the cylinder 7 in an extruding direction of the die casting material. The pressure (approx. 400 at.) Which is provided in the cylinder 1 is considerably greater than the pressure (approx. 20 at.) Which is provided in the cylinder 7, from which it follows that the valve 8 will shut off the connection between cylinder 1 and 7 and keep the connection between 2 and 7 open, as shown. Furthermore, through the pressure from the cylinder 1, the valve 3 connects the connection with the cylinder 2 closed. Press material will thus be pressed out of the cylinder 1 through the outlet 4. During this stage, material is pressed through the cylinder 7 into the cylinder 2, which is then filled while displacing the pistons on the piston rod 10 against the abutment 33; the filling is not counteracted in any way, the pump unit 13, 15 Sr is disconnected. When the cylinder Sr is filled, the crack 35 affects the connector 41, whereby a signal lamp (not shown) lights up.

Nar cylinders 1 kolv narmar sig andlaget 30, paverkar knastret 36 kontaktdonet 43, som sluter strOmkretsen till pumpmotorn 15. Namnda motor b5rj ar nu bygga upp ett arbetstryck till cylindern 21. Nar fullt arbetstryck uppnatts i cylindrarna 2 och 21, har kolystangen 9 forskjutits sa langt, att knastret 38 paverkar kontaktdonet 41, som astadkommer brytning av stromkretsen till motorn 14 och slackning av en ytterligare signallampa, varvid pumpen 12 stannar och trycket i cylindern 20 och ledningen 18 upphor. Harvid kommer ventilen 24 automatiskt att koppla om, sâ att grenledningen 23 anslutes till cylinder. 25, si att trycket bestar i denim cylinder och i cylinder. 7. Samtidigt som cylindern 2 overtager materialutpressningsarbetet, omkastas ventilerna 3 och 8, varvid cylinder. 2 anslutes till utloppet 4 och fOrbindelsen mellan cylindrarna 2 och 7 avstanges, och varvid cylindrarna 1 och 7 fOrbindas med varandra. Harefter paborjas fyllningen av cylindern 1, varvid kolvstangens 9 kolvar forskjutas i riktning mot andlaget 81. Nar knastret 34 pa kolvstangen 9 paverkar kontaktdonet 40, tandes namnda ytterligare signallampa angivande att ifragavarande cylinder är fylld. When the piston of cylinders 1 approaches the abutment 30, the crack 36 affects the connector 43, which closes the circuit to the pump motor 15. Said motor now begins to build up a working pressure to the cylinder 21. When full working pressure is reached in cylinders 2 and 21, the coil rod 9 has shifted so long that the crack 38 affects the connector 41, which causes the circuit of the motor 14 to be broken and a further signal lamp to be switched off, whereby the pump 12 stops and the pressure in the cylinder 20 and the line 18 ceases. In this case, the valve 24 will automatically switch, so that the branch line 23 is connected to the cylinder. 25, say that the pressure consists in denim cylinder and in cylinder. 7. At the same time as the cylinder 2 takes over the material extrusion work, the valves 3 and 8 are reversed, the cylinder. 2 is connected to the outlet 4 and the connection between the cylinders 2 and 7 is cut off, and the cylinders 1 and 7 are connected to each other. Then the filling of the cylinder 1 is drilled, whereby the pistons of the piston rod 9 are displaced in the direction of the abutment 81. When the crackle 34 on the piston rod 9 acts on the connector 40, the said additional signal lamp lights up indicating that the cylinder in question is filled.

Sa snart kolvstangen 10 fOrskjutits sit langt, att knastret 37 paverkar kontaktdonet 42, slates ater strOmkretsen till motorn 14 och pumpen 12 borjar att arbeta fOr att bygga upp arbetstryck i cylindern 20. Nur fullt arbetstryck uppnatts i sistnamnda cylinder, har kolvstangen 10 forskjutit sig sit langt, att knastret 39 paverkar kontaktdonet 45, varvid stramkretsen till motorn 15 brytes forst, namnda signallampa slackes och trycket i cylindrarna 2, 21 och i ledningen 19 upphor. Harvid omkastas ventilerna 3, 8 och 24 till sina forutnamnda lagen och ett nytt arbetsforlopp for cylindrarna 1 och 20 borjar, under det att cylinder. 2 fylles. As soon as the piston rod 10 has been displaced so far that the crack 37 affects the connector 42, the circuit is closed to the motor 14 and the pump 12 begins to operate to build up working pressure in the cylinder 20. Only full working pressure has been reached in the latter cylinder, the piston rod 10 has shifted far, that the crack 39 affects the connector 45, whereby the tightening circuit of the motor 15 is first broken, said signal lamp is slackened and the pressure in the cylinders 2, 21 and in the line 19 ceases. In this case, the valves 3, 8 and 24 are reversed to their aforementioned layers and a new working process for the cylinders 1 and 20 begins, while the cylinder. 2 are filled.

Namnda arbetsforlopp kunna oavbrutet fortsattas anda till dess fOrradscylinderns 7 innehall forbrukats. Om trycket i tillforselledningen 5 Sr nagot hogre an trycket i cylinder. 7, kan pafyllning av cylindern 7 ske utan driftsavbrott. De forut namnda fordelarna, som vinnas med anordningen enligt uppfinningen, framgd. tydligt av ovannamnda beskrivning. — --3 Said workflow can be continued continuously until the contents of the storage cylinder 7 have been consumed. If the pressure in the supply line 5 Sr slightly higher than the pressure in the cylinder. 7, the cylinder 7 can be refilled without interruption of operation. The aforementioned advantages gained with the device according to the invention are stated. clearly from the above description. - --3

Claims

Claim claim: Device for continuous discharge of material consisting of two piston-cylinder mechanisms (1, 9 and 2, 10) connected by lines to a valve (3), which is arranged so that it forms the line having the highest pressure connected to a material outlet (4), the piston-cylinder mechanisms being arranged to alternately supply material to the outlet (4) and arranged to be filled during their idle strokes by a further piston-cylinder mechanism (7, 11) connected via a double bale-type valve to the first-mentioned piston-cylinder mechanisms ( 1, 9 and 2, 10) discharge lines and wherein the usual piston-cylinder mechanism is connected to each hydraulically driven piston-cylinder device (25, 20 and 21) by a piston rod (11, 9 and 10 respectively) saint wherein the former piston-cylinder mechanisms piston rods (9, 10) are provided with bulges (36, 38 and 37, 39 respectively) for co-operation with contact means (48, 44 and 42, 45 respectively) for maneuvering the hydraulic devices dr. pumping means (12, 11 and 13, 15), characterized in that the bulges (36, 38 and 37, 39) are so placed on the associated piston rods (9, 10) that at the end of either piston movement in the direction of extrusion the the first bulge (36) of the piston rod (9) acts on one contact (43) to actuate the pump (13, 15) of the incident piston-cylinder mechanism (10) which is inoperative and, after further piston movement of the first-mentioned piston rod, the second bulge. (38) actuates the shut-off contact for the other pumps (12, 14) and vice versa, the hydraulic piston-cylinder device (11, 25) of the further piston-cylinder mechanism (7, 11) via a valve device (24) constantly being connected to the for the occasion, press the line (18 or 19). Request publications: Patent documents from Sweden 96263; Germany 644695, 821422; USA 2 034 921.