NO135895B

NO135895B -

Info

Publication number: NO135895B
Application number: NO4141/69A
Authority: NO
Inventors: Stein Alexander Marce Ahlqvist
Original assignee: Ahlqvist S A M
Priority date: 1968-11-14
Filing date: 1969-10-17
Publication date: 1977-03-14
Also published as: DK131024C; IL33183A0; DE1955393A1; SE312909B; ES373440A1; JPS4840910B1; AT309805B; CA926318A; DK131024B; NO135895C; BE740702A; FR2023272A1; FI49784C; FI49784B; GB1229714A; NL6916830A; IL33183A; EG9712A; CH498707A

Abstract

Fremgangsmåte for fremstilling av rør.Procedure for the manufacture of pipes.

Description

Oppfinnelsen vedrorer en fremgangsmåte for fremstilling av The invention relates to a method for the production of

ror. Hensikten med oppfinnelsen er å fremstille et ror som er enkelt og billig i produksjon, samt lett, men stivt i håndtering transport, nedlegging m.v. tube. The purpose of the invention is to produce a rudder that is simple and cheap to manufacture, as well as light but rigid in handling, transport, laying down etc.

Det er tidligere kjent å fremstille plastror ved at smeltet plastmateriale sproytes at av et munnstykke og danner lag på It was previously known to produce plastic pipes by spraying melted plastic material from a nozzle and forming layers on it

lag inne i en sylinder, idet de forskjellige lag hefter til hverandre langs hele lengderetningen av lagene. Med denne metode er det imidlertid ikke mulig å fremstille ror med ekstremt store dimensjoner. layers inside a cylinder, with the different layers adhering to each other along the entire length of the layers. With this method, however, it is not possible to produce rudders with extremely large dimensions.

Det er videre kjent å fremstille ror ved skruevikling av et båndformet materiale, hvis kanter har en slik utformning at inntilliggende kanter i efter hverandre folgende vindinger låser hverandre. Heller ikke denne metode eller modifikasjoner av denne har resultert i produkter som med hensyn til storrelse og styrke ville kunne erstatte de vesentlig tyngre betongror som nu anvendes. It is also known to produce rudders by screw winding a strip-shaped material, the edges of which have such a design that adjacent edges in successive windings lock each other. Neither this method nor its modifications have resulted in products that, in terms of size and strength, could replace the significantly heavier concrete pipes that are now used.

Formålet med foreliggende oppfinnelse er å muliggjore en forenklet fremstilling av ror av anselige dimensjoner, hvilke ror er lette men tross dette besitter stor styrke, hvorved de kan anvendes f.eks. for almindelige rorsysterner på tettere befolkede steder og derved kan fremstilles på plassen. Dette innebærer omkostningsbesparelser, reduserte behov for transporter samt forenklet nedlegging. The purpose of the present invention is to enable a simplified production of rudders of considerable dimensions, which rudders are light but despite this possess great strength, whereby they can be used e.g. for ordinary rudder cisterns in more densely populated places and can therefore be produced on site. This involves cost savings, reduced need for transport and simplified shutdown.

Nærmere bestemt vedrorer oppfinnelsen en fremgangsmåte for fremstilling av ror bestående av forst å fremstille et rorvegg- More specifically, the invention relates to a method for producing rudders consisting of first producing a rudder wall

emne i form av en strengformet hulprofil og et i ett stykke med denne sammenhengende festeorgan som har et parti med en blank in the form of a string-shaped hollow profile and an in one piece with this continuous fastening means which has a part with a

kontur som nær svarer til konturen av i det minste et parti av hulprofilen, og derpå å vikle rorveggemnet i skrueform under dannelse av en skjotfuge mellom inntil-liggende vindinger i det skrueviklede ror. Det nye og karakteristiske er at det i forbindelse med tilvirkningen av rorveggemnet innfores skumplast i hulrommet i rorveggemnet og at denne skumplast bringes til å storkne forst efter at rorveggemnet er viklet i skrueform. contour that closely corresponds to the contour of at least part of the hollow profile, and then winding the rudder wall blank in a screw shape while forming a joint between adjacent windings in the screw-wound rudder. What is new and characteristic is that in connection with the manufacture of the tube wall blank, foam plastic is introduced into the cavity in the tube wall blank and that this foam plastic is brought to solidify only after the tube wall blank has been wound into a screw shape.

Oppfinnelsen skal nu beskrives nærmere i forbindelse med tegningen. The invention will now be described in more detail in connection with the drawing.

Fig. 1 viser et eksempel på et veggemne. Fig. 1 shows an example of a wall blank.

Fig. 2 viser et tverrsnitt gjennom et parti av et ror. Fig. 2 shows a cross section through a part of a rudder.

Fig. 3 er et lengdesnitt gjennom et parti av et ror, og Fig. 3 is a longitudinal section through a part of a rudder, and

Fig. 4 viser skjematisk en del av en maskin for fremstilling av et ror ifolge oppfinnelsen. ■ Veggemnet ifolge fig. 1 har form av en rordel 10 og et i ett stykke med rordelen 10 fremstilt festeorgan 11. Dette festeorgan har et parti med en kontur (innerkontur) som nær slutter seg .•til konturen (ytterkonturen) av en del av rordelen 10. Av figuren fremgår tydelig at rprdelens 10 venstre, nedre del har en ytre kontur som stemmer godt overens med festeorganets 11 nedre, indre kontur. Fig. 4 schematically shows part of a machine for producing a rudder according to the invention. ■ The wall material according to fig. 1 has the form of a rudder part 10 and a fixing member 11 produced in one piece with the rudder part 10. This fixing member has a part with a contour (inner contour) which closely joins the contour (outer contour) of a part of the rudder part 10. From the figure it is clear that the left, lower part of the wheel part 10 has an outer contour that agrees well with the lower, inner contour of the fastening member 11.

Fremstillingen av et ror foregår slik at i forbindelse med fremstillingen av veggemnet 10, 11 innfores i veggemnets rordel skumplast som bringes til å storkne efter at veggemnet er viklet skrueformet med rordelen 10 i en vinding innfort i festeorganet 11 i en inntil-liggende vinding med et bindemiddel innfort mellom rordelen 10 og festeorganet 11 slik at skrue-fuge oppstår av rordelen, bindemiddelet og festeorganet. Med sloyfing av bindemiddel kan en skrueformet fuge mellom rordelen og festeorganet fåes ved sveising, dvs. det skrueformet viklete veggemne bringes til å passere mellom to opp-varmingselektroder. The manufacture of a rudder takes place so that in connection with the manufacture of the wall blank 10, 11, foam plastic is introduced into the wall blank's rudder part, which is brought to solidify after the wall blank is wound helically with the rudder part 10 in one turn inserted into the fastening device 11 in an adjacent turn with a bonding agent inserted between the rudder part 10 and the fastening element 11 so that a screw joint is created by the rudder part, the binding agent and the fastening element. With sloyfing of binder, a helical joint between the rudder part and the fastening element can be obtained by welding, i.e. the helically wound wall blank is made to pass between two heating electrodes.

Ved å innfore skumplasten i veggemnets rordel umiddelbart efter at veggemnet har forlatt ekstruderingshodet som former veggemnet, er det mulig å gjennomfore fremstillingen i en enkelt prosess. By inserting the foam plastic into the rudder part of the wall blank immediately after the wall blank has left the extrusion head that forms the wall blank, it is possible to carry out the production in a single process.

I maskinen ifolge fig. 4 fremstilles veggemnet ved at plast-massen bearbeides og transporteres ved en skrueanordning 40 In the machine according to fig. 4, the wall blank is produced by the plastic mass being processed and transported by a screw device 40

og derpå presses gjennom et ekstruderingshode 41, slik at et emne med en rordel fåes, se for eksempel fig. 1. Ved et matningsror 42, som er fort gjennom ekstruderingshodet 41 og således slutter bortenfor ekstruderingshodets fra skrueanord-ningen 40 vendte side, innfores skumplast i nevnte rordel. and then pressed through an extrusion head 41, so that a blank with a rudder part is obtained, see for example fig. 1. In the case of a feed rudder 42, which passes through the extrusion head 41 and thus ends beyond the side of the extrusion head facing away from the screw device 40, foam plastic is inserted into said rudder part.

Som skumplast (celleplast) kan anvendes en herdplast eller en termoplast. Anvendes en herdplast, som for eksempel fenolskum eller polyuretan, skjer skrueviklingen umiddelbart efter at plasten er innfort. Anvendes termoplast, f. eks. polyeten, oppvarmes veggemnet til hensiktsmessig temperatur for herding efter at plasten er innfort og veggemnet er viklet i skrueform. A thermosetting plastic or a thermoplastic can be used as foam plastic (cellular plastic). If a thermosetting plastic is used, such as phenolic foam or polyurethane, the screw winding takes place immediately after the plastic has been inserted. Thermoplastic is used, e.g. polyethylene, the wall blank is heated to an appropriate temperature for curing after the plastic has been inserted and the wall blank is wound in a screw shape.

Claims

1. Method for producing a rudder consisting of firstly producing a rudder wall blank in the form of a string-shaped hollow profile and a one-piece connecting member with this, which has a part with a contour that closely corresponds to the contour of at least a part of the hollow profile, and then winding the rudder wall blank in a screw shape while forming a joint between adjacent turns in the screw-wound rudder, characterized in that, in connection with the production of the rudder wall blank, foam plastic is inserted into the cavity in the rudder wall blank and that

. this foam plastic is brought to solidify only after the pipe wall blank has been wound into a screw shape.

2. Method as stated in claim 1, characterized in that the foam plastic is introduced into the tube wall blank immediately after it has left the extrusion head which forms the blank.

3. Method as stated in claim 1 or 2, characterized in that the inserted foam plastic is made of a thermosetting plastic and that the wall blank immediately after the insertion

4. Method as stated in claim 1 or 2, characterized in that the introduced foam plastic is made of a thermoplastic, and that the blank, after it has been wound helically, is heated to a suitable curing temperature.