DK169908B1 - Apparatus for the continuous manufacturing by extrusion of a pipe with a helical internal thread - Google Patents
Apparatus for the continuous manufacturing by extrusion of a pipe with a helical internal thread Download PDFInfo
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- DK169908B1 DK169908B1 DK566588A DK566588A DK169908B1 DK 169908 B1 DK169908 B1 DK 169908B1 DK 566588 A DK566588 A DK 566588A DK 566588 A DK566588 A DK 566588A DK 169908 B1 DK169908 B1 DK 169908B1
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- Denmark
- Prior art keywords
- supports
- workpiece
- rotation
- displacement
- gripping devices
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000001125 extrusion Methods 0.000 title description 8
- 230000033001 locomotion Effects 0.000 claims description 27
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000009428 plumbing Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000010924 continuous production Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/14—Twisting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/002—Handling tubes, e.g. transferring between shaping stations, loading on mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/355—Conveyors for extruded articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0072—Roughness, e.g. anti-slip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/003—Tubular articles having irregular or rough surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
i DK 169908 B1in DK 169908 B1
Den foreliggende opfindelse angår et apparat, som tillader kontinuert fremstilling gennem ekstrusion af et rør forsynet med skruesnoede gænger på sin indvendige overflade.The present invention relates to an apparatus which permits continuous production by extrusion of a screw threaded tube on its inner surface.
Et sådant apparat kan navnlig anvendes til at fremstille rør til 5 faldstammer for vand i bygninger for selvventilerende roterende afstrømning som beskrevet i skriftet FR-B1-2 251 673. For at sikre en sammenhængende afstrømning ved tyngdekraften, og uden særskilt ventilation af de forskellige former for spildevand, der fremkommer fra forskelligt udstyr i boliger, forsynes ifølge skriftet rørets indre med skruesnoede 10 gænger med trekantet profil for at føre spildevandet i rotation langs rørvæggen og således tilvejebringe en central kerne af luft, som er nødvendig for at undgå tømning af vandlåsene.In particular, such an apparatus can be used to produce pipes for 5 water droplets in buildings for self-ventilating rotary runoff as described in FR-B1-2 251 673. In order to ensure continuous gravity flow and without separate ventilation of the various forms for wastewater resulting from various equipment in homes, according to the writing, the interior of the pipe is provided with screw-threaded 10 threads with a triangular profile to guide the wastewater in rotation along the pipe wall and thus provide a central core of air necessary to avoid emptying the water locks.
Ifølge GB-patentskrift 1 377 401 kan sådanne produkter udføres industrielt ved samtidig udførelse af en fremtrækkepåvirkning og en ro-15 tationspåvirkning på et røremne, idet det går ud af ekstruderens mundstykke ved hjælp af et eller flere rullepar, der drives til rotation og er arrangeret ved diametralt modstående steder på den ene og på den anden side af emnet. Rullernes akser er skråtstillet i forhold til emnets akse og deres rotation bibringer samtidig emnet en fremtrækkevirkning og 20 et moment, som får emnet til at rotere om sig selv.According to British Patent Specification 1,377,401 such products can be made industrially by simultaneously performing a forward action and a rotational action on a plumbing, leaving the nozzle of the extruder by means of one or more roller pairs driven for rotation and arranged at diametrically opposed places on one and the other side of the workpiece. The axes of the rollers are inclined with respect to the axis of the workpiece and their rotation simultaneously gives the workpiece a forward action and a torque which causes the workpiece to rotate about itself.
Denne kendte indretning har den ulempe, at medbringningen til translation og rotation af røremnet sikres ved rulning under udøvelse af en friktionspåvirkning på røremnet. Der er en ikke ubetydelig risiko for glidning mellem emnet og rullerne, hvilket medfører en meget dårlig nøj-25 agtighed i væggene af det således fremstillede rør.This known device has the disadvantage that the conveyance for translation and rotation of the pipe blank is ensured by rolling while exerting a frictional influence on the pipe blank. There is a not insignificant risk of slipping between the workpiece and the rollers, which results in very poor accuracy in the walls of the pipe thus produced.
Det er endvidere, navnlig fra brugsmodel skriftet FR-B3-2 196 954 kendt at udøve en fremtrækkevirkning på et røremne, idet det går ud af en ekstruders mundstykke ved hjælp af en pneumatisk gribeindretning, der føres i en fremadgående bevægelse langs rørets akse. Dette skrift viser 30 ligeledes den samtidige udnyttelse af to gribeindretninger for at sikre kontinuert fremføring af emnet. Der er imidlertid ingen beskrivelse eller antydning af midler, som tillader på den således udførte trækkevirkning at superponere en rotationsvirkning, hvilket vil være nødvendigt for at udføre skruesnoede gænger på det ekstruderede rør.Furthermore, it is known, in particular from the utility model written FR-B3-2 196 954, to exert a thrust effect on a pipe blank as it exits an extruder's nozzle by means of a pneumatic gripping device which is guided in a forward motion along the axis of the pipe. This publication also illustrates the simultaneous utilization of two gripping devices to ensure continuous advancement of the workpiece. However, there is no description or suggestion of means which allow for the pulling effect so performed to superpose a rotary action, which will be necessary to perform screw-threaded threads on the extruded tube.
35 Opfindelsen har til formål at tilvejebringe et apparat, som tilla der kontinuert fremstilling ved ekstrusion af et rør med skruegænger, og hvilket apparat ikke lider af ulemperne ved apparatet beskrevet i skriftet GB-A-1 377 401, og som især tillader at opnå en meget bedre nøjag- DK 169908 B1 2 tighed.The invention has for its object to provide an apparatus which permits continuous production by extrusion of a screw threaded pipe, and which apparatus does not suffer from the disadvantages of the apparatus described in the specification GB-A-1 377 401, and which in particular allows to obtain a much better accuracy.
Dette opnås ved et apparat til kontinuert fremstilling af et rør med skruegænger indvendigt omfattende en ekstruder forsynet med et mundstykke med et tværsnit komplementært til tværsnittet af det rør, som 5 ønskes fremstillet, og et organ til fremtrækning og rotation for på et røremne, der udgår fra mundstykket, at udføre en fremtrækkepåvirkning samtidig med en rotationspåvirkning, hvilket apparat er ejendommeligt ved, at organet til fremtrækning og rotation omfatter mindst to gribe-indretninger indrettet til at være i udvendigt indgreb med eller frikob-10 let fra emnet, et forskydningsorgan indrettet til at bibringe hver af gribeindretningerne en alternativ forskydningsbevægelse langs emnets akse, et rotationsorgan, som sikrer rotation af hver gribeindretning omkring emnets akse under en udtrækningsfase i forskydningsbevægelsen, og et styreorgan for gribeindretningerne og for forskydningsorganerne, 15 hvoraf en aktivering sikrer, at mindst én af gribeindretningerne hele tiden er i indgreb med emnet i en udtrækningsfase i forskydningsbevægelsen.This is achieved by an apparatus for continuously manufacturing a screw threaded tube comprising an extruder provided with a nozzle having a cross-section complementary to the cross-section of the tube which is desired to be manufactured, and a means for drawing and rotating on a pipe blank extending from the nozzle, performing an extension actuation simultaneously with a rotational actuation, the apparatus being characterized in that the actuating and rotating means comprises at least two gripping devices arranged to be externally engaged or disconnected from the workpiece, a displacement means adapted to imparting to each of the gripping devices an alternate shear movement along the axis of the workpiece, a rotating means which ensures rotation of each gripping device about the workpiece axis during an extension phase of the shearing movement, and a control means for the gripping devices and for the shearing means, of which an activation ensures that at least one of the gripping means ne constantly engages with the subject in a pull-out phase of the shear motion.
Organet til fremtrækning og rotation omfatter fortrinsvis en ramme forsynet med midler til at styre mindst to understøtninger parallelt 20 langs emnets akse, idet hver gribeindretning er monteret roterbart omkring emnets akse på én af understøtningerne, idet forskydningsmidlerne, som påvirker understøtningerne, og rotationsorganerne er indskudt mellem rammen og hver af gribeindretningerne.The means for projecting and rotating preferably comprises a frame provided with means for guiding at least two supports parallel to the axis of the workpiece, each gripping device being rotatably mounted around the workpiece axis on one of the supports, the displacement means affecting the supports and the rotating means being interposed between the frame and each of the gripping devices.
Rotationsorganerne kan navnlig omfatte en tandstang forbundet med 25 rammen, et spidshjul monteret på hver understøtning og i tandindgreb med tandstangen og en bevægelsestransmission eller kinematisk transmission, som overfører en rotation fra hvert spidshjul til en rotation af gribe-indretningen monteret på den respektive understøtning.In particular, the rotating means may comprise a rack connected to the frame, a sprocket mounted on each support and in gear with the rack, and a motion transmission or kinematic transmission which transfers a rotation from each sprocket to a rotation of the gripping device mounted on the respective support.
Forskydningsmidlerne omfatter videre fortrinsvis et enkelt motor-30 organ med en udgangsaksel, hvis rotation overføres til en forskydning af hver understøtning langs styremidlerne i retning til trækning af emnet gennem en bevægelsestransmission omfattende en kobling. Hvert forskydningsmiddel omfatter videre en donkraft eller aktuator indskudt mellem rammen og én af understøtningerne, hvor en aktivering heraf styrer en 35 bevægelse af understøtningen langs styreorganet i retning modsat trækning af emnet.The displacement means further preferably comprise a single motor means with an output shaft, the rotation of which is transmitted to an displacement of each support along the control means in the direction of pulling the workpiece through a movement transmission comprising a clutch. Each shear means further comprises a jack or actuator interposed between the frame and one of the supports, an activation thereof controlling a movement of the support along the guide in the direction opposite to the drawing of the workpiece.
Styreorganet kan således samtidig styre motororganet, gribeindretningerne, koblingerne og donkraftene og en hastighedsvariator forbundet i DK 169908 B1 3 med motororganet i afhængighed af ekstruderens ydelse.Thus, the control means can simultaneously control the motor means, the gripping devices, the couplings and the jacks and a speed variator connected in DK 169908 B1 3 with the motor means depending on the extruder's performance.
Hver af gribeindretningerne omfatter endelig fortrinsvis en elastisk muffe, der aktiveres pneumatisk, så den kan medbringe røret uden glidning.Finally, each of the gripping devices preferably comprises an elastic sleeve which is pneumatically actuated so that it can carry the tube without slipping.
5 Opfindelsen vil fremgå nærmere af den følgende beskrivelse under henvisning til den tilhørende tegning, hvorpå fig. 1 viser en skematisk samlet sideafbildning af et apparat til fremstilling af rør ved ekstrusion ifølge opfindelsen, 10 fig. 2 en sideafbildning i større målestok af trække- og rota tionsindretningen ifølge opfindelsen, fig. 3 et skematisk planbillede af en del af indretningen fra fig.The invention will become more apparent from the following description with reference to the accompanying drawings, in which: FIG. 1 shows a schematic overall side view of an apparatus for making extrusion tubes according to the invention; FIG. 2 is a larger scale side view of the pulling and rotating device according to the invention; FIG. 3 is a schematic plan view of a portion of the device of FIG.
2, fig. 4 et skematisk snitbillede af afskæringsindretningen placeret 15 efter trække- og rotationsindretningen, og fig. 5 et perspektivisk delvis gennemskåret billede af det frembragte produkt.2, FIG. 4 is a schematic sectional view of the cutting device positioned 15 after the pulling and rotating device; and FIG. 5 is a perspective, partially cut-away view of the product produced.
Apparatet, som tillader kontinuert fremstilling ved ekstrusion af 20 et plastikrør 5 med indvendige skruegænger 5a som vist i fig. 5, er vist meget skematisk i fig. 1. Dette apparat omfatter en sædvanlig ekstruder 1 forsynet med et ringmundstykke 2 forsynet med indsnit 3 som vist i snitbilledet IV i fig. 1. Mundstykkets indsnit 3 er beregnet til at forme de indvendige gænger i røremnet 5, som forlader mundstykket.The apparatus which allows continuous production by extrusion of a plastic tube 5 with internal screw threads 5a as shown in FIG. 5 is shown very schematically in FIG. 1. This apparatus comprises a conventional extruder 1 provided with an annular nozzle 2 provided with notches 3 as shown in section IV of FIG. 1. The nozzle incision 3 is intended to form the internal threads of the tube blank 5 leaving the nozzle.
25 Efter ekstrusionen underkastes røremnet 5 samtidig en fremtrække- virkning og en rotationsvirkning, som udføres af en trækkeenhed 8, gennem en vakuumformbi ok 6 fulgt af et vandbassin 7, som tillader størkning af det ekstruderede materiale. Trækkeenheden 8 medfører røremnet 5 mod en afsavningsenhed 9 under samtidig fremtrækning og rotation.After the extrusion, the tube blank 5 is simultaneously subjected to a forward action and a rotary action performed by a pulling unit 8 through a vacuum molding tube 6 followed by a water basin 7 which permits solidification of the extruded material. The pulling unit 8 causes the stirrer 5 towards a sawing unit 9 during simultaneous pulling and rotation.
30 Som vist mere nøjagtigt i fig. 4 omfatter oversavningsenheden 9 en oversko 10 og en undersko 10' i V-form anbragt på den ene og den anden side af røret 5 og hver forsynet med frit roterbare ruller 11 på en sådan måde, at de kan være i kontakt med den udvendige overflade af røremnet 5. Skoene 10 og 10' er monteret på en slæde 12, som bærer et savblad 35 13 i afsavningsenheden 9 som vist i fig. 1. En donkraft eller aktuator 33 tillader at bevæge den øverste sko 10, når der gives ordre til oversavning for at sikre friktionsindgreb med rullerne 11 mod den udvendige overflade af emnet 5. Skoene 10 og 10' medfører således i forskydnings- DK 169908 B1 4 bevægelse slæden 12 med savbladet 13 sammen wed røremnet 5, hvilket til-lader savbladet 13 at udføre en transversal afskæring af røret uden dødtid og i takt med rotationen og fremføringen af røret. En opsamlingsbeholder 14 (fig. 1) modtager til sidst de afsavede rørlængder, som er 5 klar til videre behandling.30 As shown more precisely in FIG. 4, the sawing unit 9 comprises an upper shoe 10 and a V-shaped shoe 10 'disposed on one and the other side of the tube 5 and each provided with freely rotatable rollers 11 in such a way that they can be in contact with the outer surface. of the blank 5. The shoes 10 and 10 'are mounted on a carriage 12 which carries a saw blade 35 13 in the sawing unit 9 as shown in FIG. 1. A jack or actuator 33 allows the upper shoe 10 to move when ordering sawing to ensure frictional engagement with the rollers 11 against the outer surface of the workpiece 5. The shoes 10 and 10 'thus result in shearing. moving the carriage 12 with the saw blade 13 together with the pipe blank 5, which allows the saw blade 13 to perform a transverse cutting of the pipe without dead time and in step with the rotation and advance of the pipe. A collection vessel 14 (Fig. 1) eventually receives the sawed pipe lengths which are ready for further processing.
Som vist mere detaljeret i fig. 2 omfatter trækkeenheden 8, som danner enheden til trækning og rotation ifølge opfindelsen, en ramme 15 forsynet med to styrestænger 16 orienteret parallelt med aksen for det røremne 5, som forlader mundstykket 2. To understøtninger 17 er monteret 10 på uafhængig forskydelig måde på styrestængerne 16 på en sådan måde, at de kan medføres indbyrdes uafhængigt i en frem- og tilbagegående bevægelse langs stængerne under virkning af forskydningsorganerne, som skal beskrives nedenfor.As shown in more detail in FIG. 2, the pulling unit 8, which forms the pulling and rotating unit according to the invention, comprises a frame 15 provided with two guide rods 16 oriented parallel to the axis of the pipe blank 5 leaving the nozzle 2. Two supports 17 are mounted independently slidably on the guide rods 16 in such a way that they can be carried independently of one another in a reciprocating motion along the rods under the action of the shear members to be described below.
En gribeindretning 26 er monteret roterbart på hver af understøt-15 ni ngerne 17 omkring en fælles akse, som falder sammen med aksen for røremnet 5. Hver af gribeindretningerne 26 er en pneumatisk styret indretning med en elastisk muffe 28, der kan trykke mod den ydre overflade af røremnet 5 under virkning af et pneumatisk tryk i legemet 29 i gribeind-retningen. Den derved opnåede adhæsion mellem muffen 28 i hver gribeind-20 retning og røremnet tillader at medføre det sidstnævnte under fremtræk-ning og rotation uden nogen form for glidning. Den roterbare understøtning af hver af gribeindretningerne 26 ved den respektive understøtning 17 sikres ved trykkuglelejer 27.A gripping device 26 is rotatably mounted on each of the supports 17 around a common axis which coincides with the axis of the tube blank 5. Each of the gripping devices 26 is a pneumatically controlled device with an elastic sleeve 28 capable of pressing against the outer surface of the tube blank 5 under the action of a pneumatic pressure in the body 29 of the gripping device. The adhesion thus obtained between the sleeve 28 in each gripping device and the tube blank allows to bring about the latter during tensioning and rotation without any slippage. The rotatable support of each of the gripping devices 26 at the respective support 17 is secured by pressure ball bearings 27.
For at udtrækkebevægelsen på røremnet, der udføres alternativt af 25 den ene og den anden gribeindretning 26, skal være ledsaget af en rotationsbevægelse af emnet, er der arrangeret midler til automatisk styring af denne rotation på nøjagtig og kontrolleret måde. Disse midler omfatter en tandstang 19 på rammen 15 orienteret parallelt med røremnets akse. Hver af understøtningerne 17 bærer to koniske spidshjul 18 i indbyr-30 des tandindgreb, hvoraf det ene spidshjul 18 er fast forbundet med et andet spidshjul, som er i tandindgreb med tandstangen 19, mens det andet koniske spidshjul 18 er fast forbundet med gribeindretningen 26 monteret på den tilsvarende understøtning 17. På denne måde forstås det, at forskydningen af hver af understøtningerne 17 langs styrestængerne 16 auto-35 matisk ledsages af en rotation af gribeindretningen 26 båret derpå, hvilken rotation er regelmæssig og vel fastlagt for den nøjagtige forskydningshastighed af understøtningen.In order to extract the movement of the workpiece, alternatively performed by one and the other gripping device 26, must be accompanied by a rotational movement of the workpiece, means for automatically controlling this rotation in an accurate and controlled manner. These means comprise a rack 19 on the frame 15 oriented parallel to the axis of the platen. Each of the supports 17 carries two tapered sprockets 18 with respect to each other, one of which sprocket 18 is fixedly connected to another sprocket, which is in engagement with the rack 19, while the other tapered sprocket 18 is firmly connected to the gripping device 26 mounted. on the corresponding support 17. In this way, it is understood that the displacement of each of the supports 17 along the guide rods 16 is automatically accompanied by a rotation of the gripper device 26 carried thereon, which rotation is regular and well determined for the exact displacement rate of the support.
Medbringningen af hver af understøtningerne 17 i retningen svaren- s DK 169908 B1 5 de til fremtrækning eller udtrækning af røremnet sikres ved en enkelt hovedmotor 25, hvorfra rotationen af udgangsakslen overføres til en forskydning i retningen svarende til udtrækning af røremnet for mindst én af understøtningerne 17 ved en bevæge!seskæde eller kinematisk kæde, som 5 er identisk for hver af understøtningerne. Som det er vist i fig. 2 og 3, omfatter denne bevægelseskæde for hver af understøtningerne 17 en kobling 24 og et sæt af kæder og fortandede hjul på parallelle aksler 21, 22 og 23, som sikrer reduktionsforholdet for bevægelserne. Forskydningen af hver af understøtningerne 17 sikres ved et sidste par af kæder 10 20, der føres af et fortandet hjul på akslen 21, og som er fast på den tilsvarende understøtning 17.The bringing of each of the supports 17 in the direction corresponding to the pulling or pulling of the pipe blank is ensured by a single main motor 25, from which the rotation of the output shaft is transferred to a displacement in the direction corresponding to the pulling of the pipe blank for at least one of the supports 17. by a moving or kinematic chain 5 identical to each of the supports. As shown in FIG. 2 and 3, this movement chain for each of the supports 17 includes a clutch 24 and a set of chains and toothed wheels on parallel shafts 21, 22 and 23 which ensure the reduction ratio of the movements. The displacement of each of the supports 17 is secured by a last pair of chains 10 20 driven by a toothed wheel on the shaft 21 and fixed to the corresponding support 17.
Idet motoren 25 altid roterer i samme retning svarende til bevægelse af understøtningerne 17 i retning af udtrækning af røremnet, opnås forskydningen for hver af understøtningerne 17 i modsat retning ved et 15 særskilt organ. I den viste udførelsesform er dette organ for hver af understøtningerne dannet af en donkraft eller aktuator 30, hvis hus er fast monteret på rammen 15, og hvis stang er orienteret parallelt med røremnets akse, idet yderpunktet for hver aktuatorstang er fast forbundet til den tilsvarende understøtning 17.Since the motor 25 always rotates in the same direction corresponding to the movement of the supports 17 in the direction of extraction of the pipe blank, the displacement for each of the supports 17 is obtained in the opposite direction by a separate member. In the illustrated embodiment, this means for each of the supports is formed by a jack or actuator 30, the housing of which is fixedly mounted on the frame 15 and whose rod is oriented parallel to the axis of the plunger, the extremity of each actuator rod being firmly connected to the corresponding support. 17th
20 Hovedmotoren 25 er fortrinsvis forsynet med en hastighedsvariator 32, der tillader tilpasning af motorhastigheden til ekstruderens ydelse.Preferably, the main motor 25 is provided with a speed variator 32 which allows adjustment of the motor speed to the extruder's performance.
En styreenhed 31 omfattende en programvælger styrer motoren 25 og hastighedsvariatoren 32, så motorhastigheden tilpasses et signal, som indikerer variation i ekstruderydelsen. Programvælgeren 31 styrer lige-25 ledes elektroventiler (ikke vist), som tillader sikring af indgreb og slipning af røremnet i hver af gribeindretningerne 26, koblingerne 24 og aktuatorerne 30.A control unit 31 comprising a program selector controls the motor 25 and the speed variator 32 so that the motor speed is adjusted to a signal indicating variation in the extruder performance. The program selector 31 controls direct-operated electro valves (not shown), which allow the locking and grinding of the blank in each of the gripping devices 26, the couplings 24 and the actuators 30 to be secured.
Programvælgeren 31 sikrer således synkronisering af samtlige bevægelser i trækkeenheden 8, således at der altid er én af gribeindretnin-30 gerne 26 i indgreb med røremnet, og så den understøtning, som bærer den pågældende gribeindretning, samtidig forskydes i retning svarende til udtrækning eller fremføring af røremnet med en hastighed, som er tilpasset ekstruderydelsen. Dette betyder, at koblingen 24 for bevægelseskæden, som sikrer medføring af den pågældende understøtning, tilkobles, og 35 at den tilsvarende aktuator 30 modsat er sat ud af funktion. Gennem tandstangen 19 og spidshjulet 18 opnås, at forskydningen af slæden 17 i retning af fremtrækning af røret ledsages af bibringelsen af en rotation på gribeindretningen 26, hvilken rotation er proportional med understøt- 6 DK 169908 B1 ningens fremskriden uafhængigt af dens forskydningshastighed. Stigningen af de skruegænger, der således udføres i røremnet, er dermed konstant og uafhængig af ekstrusionshastigheden.Thus, the program selector 31 ensures synchronization of all the movements in the pulling unit 8, so that there is always one of the gripping devices 30 in engagement with the plumbing, and so that the support supporting the gripping device in question is simultaneously shifted in the direction corresponding to the pull-out or advance of the the tube blank at a rate adapted to the extruder performance. This means that the coupling 24 for the movement chain, which ensures the supply of the support in question, is switched on and 35 that the corresponding actuator 30 is opposite functionally disabled. Through the rack 19 and the pinwheel 18, the displacement of the carriage 17 towards the extension of the pipe is accomplished by imparting a rotation on the gripper 26 which is proportional to the progress of the support regardless of its shear speed. The increase of the screw threads thus carried out in the pipe blank is thus constant and independent of the extrusion rate.
Mens én af understøtningerne 17 således forskydes for samtidig at 5 sikre fremtrækning og rotation af røremnet, er koblingen 24 ved bevægelseskæden, som forbinder motoren 25 med den anden understøtning 17, fri-koblet, og den tilsvarende aktuator 30 er aktiveret for at tilbageføre denne understøtning 17 i modsat retning.Thus, while one of the supports 17 is displaced so as to ensure simultaneous extension and rotation of the pipe blank, the coupling 24 at the motion chain connecting the motor 25 to the other support 17 is free-coupled and the corresponding actuator 30 is actuated to reverse this support. 17 in the opposite direction.
For at sikre kontinuiteten i bevægelsen til udtrækning og rotation 10 af røremnet bemærkes det, at den returnerende bevægelse af understøtningerne 17 er hurtigere end den fremadgående bevægelse, således at gribe-indretningen 26, der tilbageføres i retning modsat røremnets fremføring ved den tilsvarende aktuator 30, kan aktiveres efter neutralisering af denne aktuator og indkobling af den tilsvarende kobling for at sikre o-15 vertagelse fra den anden gribeindretning, før denne har nået enden af sin vandring. Kontinuiteten af bevægelsen til fremtrækning og rotation af røret nødvendiggør sagt på en anden måde, at de to gribeindretninger er i samtidigt indgreb med røremnet over en kortere del af funktionscyklussen for trækkeindretningen 8. Ved hjælp af de to diskontinuerte al-20 ternati ve bevægelser kan man således bibringe røret en kontinuert bevægelse, som tillader at undgå enhver form for brud under fremstillingen.In order to ensure the continuity of movement for extraction and rotation 10 of the pipe blank, it is noted that the return movement of the supports 17 is faster than the forward movement, so that the gripping device 26 which is reversed in the direction opposite to the movement of the blank by the corresponding actuator 30, can be activated after neutralizing this actuator and switching on the corresponding clutch to ensure o-15 displacement from the second gripper device before it has reached the end of its travel. In other words, the continuity of the movement for pulling and rotating the tube necessitates that the two gripping devices engage simultaneously with the tube blank over a shorter portion of the operating cycle of the pulling device 8. By means of the two discontinuous alternate movements, one can thus, the tube imparts a continuous movement which allows to avoid any breakage during manufacture.
Ved den beskrevne indretning, og navnlig på grund af den perfekte synkronisering af de forskellige faser til fremstilling af røret (eks-trusion, kalibrering, afkøling, torsion-rotation og afsavning), er det 25 således muligt på økonomisk og kontinuert måde uden tab og under udnyttelse af en enkelt trækkeenhed at fremstille plastikrør med indvendige skruegænger med stor præcision.Thus, with the described device, and in particular because of the perfect synchronization of the various phases for the manufacture of the tube (extrusion, calibration, cooling, torsion rotation and sawing), it is possible in an economical and continuous manner without loss and using a single pull unit to manufacture plastic tubes with high precision internal screw threads.
r *r *
Claims (9)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8702050 | 1987-02-18 | ||
| FR8702050 | 1987-02-18 | ||
| PCT/FR1988/000087 WO1988006089A2 (en) | 1987-02-18 | 1988-02-17 | Device for the continuous manufacture by extrusion of a tube provided with spiral threads |
| FR8800087 | 1988-02-17 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK566588D0 DK566588D0 (en) | 1988-10-11 |
| DK566588A DK566588A (en) | 1988-10-11 |
| DK169908B1 true DK169908B1 (en) | 1995-04-03 |
Family
ID=9348029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK566588A DK169908B1 (en) | 1987-02-18 | 1988-10-11 | Apparatus for the continuous manufacturing by extrusion of a pipe with a helical internal thread |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0302922B1 (en) |
| DE (2) | DE3864351D1 (en) |
| DK (1) | DK169908B1 (en) |
| FI (1) | FI94400C (en) |
| NO (1) | NO884513D0 (en) |
| WO (1) | WO1988006089A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2348164A (en) * | 1999-03-24 | 2000-09-27 | Uponor Ltd | Pipe producing method and apparatus |
| DE102017121940A1 (en) * | 2017-09-21 | 2019-03-21 | Arno Friedrichs | Method and device for producing a circular-cylindrical body consisting of plastic mass |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE570554C (en) * | 1933-02-17 | Mannesmann Ag | Rotating device on feed devices for pilgrim step rolling mills | |
| US2871911A (en) * | 1953-01-13 | 1959-02-03 | Glastrusions | Apparatus for producing elongated articles from fiber-reinforced plastic material |
| US3234312A (en) * | 1965-02-01 | 1966-02-08 | Du Pont | Method of orienting thermoplastic pipe |
| DE1602065A1 (en) * | 1967-04-01 | 1971-08-05 | Elektrostalskij Sawod Tyaschel | Tube cold rolling mill |
| DE1752792C3 (en) * | 1968-07-16 | 1973-10-25 | Mannesmann-Meer Ag, 4050 Moenchengladbach | Feed gearbox on cold pilger mills |
| US3630058A (en) * | 1970-01-27 | 1971-12-28 | Frances E Reed | Process and apparatus for forming tubes with spiral corrugations |
| NL7100665A (en) * | 1971-01-18 | 1972-07-20 | ||
| GB1438285A (en) * | 1972-08-25 | 1976-06-03 | Imp Metal Ind Kynoch Ltd | Clamping and transfer device for elongate articles |
| FR2173100B1 (en) * | 1973-02-21 | 1977-07-29 | Florimond Et Chabardes Ets | |
| DE2507186A1 (en) * | 1975-02-20 | 1976-09-09 | Basf Ag | Controlling dimensions and quality of plastic extrudates - by controlling withdrawal velocity in accordance with pressure on molten extrudable mass |
| US4289465A (en) * | 1979-12-07 | 1981-09-15 | Ppg Industries, Inc. | Apparatus for formation of pultruded fiber glass reinforced twisted article |
-
1988
- 1988-02-17 EP EP88901864A patent/EP0302922B1/en not_active Expired - Lifetime
- 1988-02-17 DE DE8888901864T patent/DE3864351D1/en not_active Expired - Lifetime
- 1988-02-17 DE DE198888901864T patent/DE302922T1/en active Pending
- 1988-02-17 WO PCT/FR1988/000087 patent/WO1988006089A2/en not_active Ceased
- 1988-10-10 NO NO884513A patent/NO884513D0/en unknown
- 1988-10-10 FI FI884642A patent/FI94400C/en active IP Right Grant
- 1988-10-11 DK DK566588A patent/DK169908B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI94400C (en) | 1995-09-11 |
| NO884513L (en) | 1988-10-10 |
| FI94400B (en) | 1995-05-31 |
| FI884642A0 (en) | 1988-10-10 |
| EP0302922B1 (en) | 1991-08-21 |
| DE3864351D1 (en) | 1991-09-26 |
| NO884513D0 (en) | 1988-10-10 |
| WO1988006089A2 (en) | 1988-08-25 |
| DK566588D0 (en) | 1988-10-11 |
| DK566588A (en) | 1988-10-11 |
| EP0302922A1 (en) | 1989-02-15 |
| WO1988006089A3 (en) | 1988-11-03 |
| DE302922T1 (en) | 1989-06-01 |
| FI884642A7 (en) | 1988-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PUP | Patent expired |