NO762883L - - Google Patents
Info
- Publication number
- NO762883L NO762883L NO762883A NO762883A NO762883L NO 762883 L NO762883 L NO 762883L NO 762883 A NO762883 A NO 762883A NO 762883 A NO762883 A NO 762883A NO 762883 L NO762883 L NO 762883L
- Authority
- NO
- Norway
- Prior art keywords
- cooling
- cooling body
- pipe
- plastic pipe
- plastic
- Prior art date
Links
- 238000001816 cooling Methods 0.000 claims description 43
- 239000004033 plastic Substances 0.000 claims description 17
- 229920003023 plastic Polymers 0.000 claims description 17
- 238000001125 extrusion Methods 0.000 claims description 8
- 229920001169 thermoplastic Polymers 0.000 claims description 8
- 239000004416 thermosoftening plastic Substances 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004792 oxidative damage Effects 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Classifications
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
-
- 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
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
Oppfinnelsen vedrører en innretning til fremstilling av speriningsfattige rør av termoplastisk kunststoff ved kalibrering og avkjøling utenifra og ekstra indreavkjøling og er spesielt egnet for tykkveggede rør. The invention relates to a device for the production of low-sparing pipes of thermoplastic plastic by calibration and cooling from the outside and additional internal cooling and is particularly suitable for thick-walled pipes.
Gjenstanden for hovedpatentet (norsk søknad nr. The object of the main patent (Norwegian application no.
76 l8 28) er en innretning til fremstilling av spennings fattige kunststoffrør (1) av termoplast, spesielt delkrystallinsk .termoplast, som høytetthets-polyetylen og -polypropylen ved kalibrering og avkjøling utenifra og ekstra indre avkjøling, idet denne innretning erkarakterisert vedat rørsprøytehodets dor t forlenget ved hjelp av et dobbeltvegget, rørformet kjøle-legeme 3, hvis ytre diameter er mindre enn den indre diameter av kunststoffrøret 1 over en isoleringsplate 4, i hulrommet mellom de to vegger av kjølelegemet 3 fører tilførsel og bort-føringer 5, 6 for kjølemediet, i kjølelegemet 3 er anbragt en vifte 7, hvis strømtilførsel foregår gjennom en-.kabel 8 og idet det på viften 7 eventuelt er stukket på et rørformet luft-føringsblikk. 76 l8 28) is a device for producing stress-poor plastic tubes (1) of thermoplastics, especially partially crystalline thermoplastics, such as high-density polyethylene and polypropylene by calibration and cooling from the outside and extra internal cooling, this device being characterized by the tube spray head's dor t being extended by means of a double-walled, tubular cooling body 3, the outer diameter of which is smaller than the inner diameter of the plastic pipe 1 above an insulating plate 4, in the cavity between the two walls of the cooling body 3, supply and removal leads 5, 6 for the cooling medium, a fan 7 is placed in the heatsink 3, the power supply of which takes place through a cable 8 and with the fan 7 possibly being fitted with a tubular air duct.
Luften mellom kunststoffrør og kjølelegemet.kan derved føres mot ekstrusjonsretningen, men også med ekstrusjonsretningen. The air between the plastic tube and the heat sink can thereby be directed towards the direction of extrusion, but also with the direction of extrusion.
Ved innretningen ifølge hovedpatentet hovedsake-lig tynnveggede rør. Ved anvendelse av tykkveggede rør ville det ved den begrenset fremstillbare lengde av kjølelegemet bare oppnås en mindre spenningsreduserende effekt resp. ekstruK-sjonshastigheten måtte for å oppnå den ønskede effekt nedsettes i forhold til normal rørproduksjon. In the device according to the main patent, mainly thin-walled pipes. When using thick-walled pipes, the limited length of the heat sink that can be produced would only achieve a smaller voltage-reducing effect or In order to achieve the desired effect, the extrusion speed had to be reduced compared to normal pipe production.
Videre består ved fremgangsmåten ifølge hovedpatentet ved anvendelse av tykkveggede rør av kunststoff, spesielt polyolefiner, den "mulighet med opptreden av kvalitets-mangler, således at spesielt disse tykkveggede rør ved oksygen-innholdet av den ved den indre kalibrering nødvendige trykkluft kan undergå en avbygning av molekylene på grunn av termisk oksydativ beskadigelse. Ved fremstillingen av tykkveggede polyolefinrør med en høy produksjonshastighet fremkommer nemlig tvangsmessig høye smeltetemperaturer som begunstiger den termisk oksydative avbygning. Furthermore, in the method according to the main patent, when using thick-walled pipes made of plastic, especially polyolefins, there is the "possibility of appearance of quality defects, so that especially these thick-walled pipes can undergo a breakdown of the molecules due to thermal oxidative damage.In the production of thick-walled polyolefin pipes at a high production rate, high melting temperatures occur which favor the thermal oxidative degradation.
Det er nå funnet at det er mulig også å frem-stille tykkveggede rør av termoplaster, spesielt polyolefiner, på fordelaktig måte spennings fritt resp. spenningsfattig- og uten nevnte mangler når man ikke, som i innretningen ifølge hovedpatentet bare anvender ett kjølelegeme 3 ifølge oppfinnelsen, men anordner to eller flere kjølelegemer etter hverandre, hvor på spesiell fordelaktig måte luften strømmer 1 spalten mellom kunststoffrør og kjølelegemet i ekstruksjonsretning. It has now been found that it is also possible to produce thick-walled pipes from thermoplastics, especially polyolefins, in an advantageous manner without tension or voltage-poor and without the mentioned defects when one does not, as in the device according to the main patent, only use one cooling body 3 according to the invention, but arranges two or more cooling bodies one after the other, where in a particularly advantageous way the air flows 1 the gap between the plastic tube and the cooling body in the direction of extrusion.
Oppfinnelsens gjenstand er derfor en innretning til fremstilling av spennings fattige kunststoffrør 1 av termoplaster, spesielt delkrystallinske termoplaster, som høytett- ' hetspolyetylen og -polypropylen ved kalibrering og kjøling utenifra og ekstra indreavkjøling, idet rørsprøytehodets dor 2 over en isoleringsplate 4 forlenges ved et dobbeltvegget, rørformet kjølelegeme 3>hvis ytre diameter er mindre enn den indre diameter av kunststoffrøret 1, i hulrommet mellom de to vegger av.kjølelegemet 3 fører til- og bortføringen 5a 6 for kjølemediet, i kjølelegemet 3 er anbragt en vifte hvis strøm-tilførsel foregår gjennom en kabel 8 ifølge patent (norsk søknad nr. 76 18 28),karakterisert vedat to eller The object of the invention is therefore a device for producing stress-poor plastic tubes 1 of thermoplastics, especially semi-crystalline thermoplastics, such as high-density polyethylene and polypropylene by calibration and cooling from the outside and additional cooling from the inside, the mandrel 2 of the pipe sprayer head being extended over an insulating plate 4 by a double-walled, tubular cooling body 3>whose outer diameter is smaller than the inner diameter of the plastic pipe 1, in the cavity between the two walls of the cooling body 3 leads to the supply and removal 5a 6 for the cooling medium, in the cooling body 3 a fan is placed whose current supply takes place through a cable 8 according to patent (Norwegian application no. 76 18 28), characterized in that two or
■flere kjølelegemer 3' er anordnet etter hverandre i kunststoff-røret 1. ■several cooling bodies 3' are arranged one behind the other in the plastic pipe 1.
Det første kjølelegemet 3 er derved, som allerede nevnt, fastgjort varmeisolerende på doren 2 av rørsprøytehodet og de etterfølgende kjølelegemer 3' forbindes ved forbindelser, spesielt forbindelsesstenger 14 stedfast og fordreibart sikkert med kjølelegemene 3>3'. The first cooling body 3 is thereby, as already mentioned, heat-insulatingly attached to the mandrel 2 of the pipe sprayer head and the subsequent cooling bodies 3' are connected by connections, especially connecting rods 14 securely and rotatably with the cooling bodies 3>3'.
For å unngå en gjennombøyning av første kjøle-legeme anbringes på dets fri ende fordelaktig fjærende lagrede bæreruller 15, som avstøter en del av dets vekt på kunststoff-røret. Dette er mulig på grunn av den allerede foregåtte fastgjøring av rørmaterialet uten påvirkning av rørindreflaten. Det etterfølgende kjølelegemet 3' har ved begge ender bæreruller 15 og støtter sin samlede vekt på kunststoffrøret 1 over bæreruller 15- Pjæringen av bærerullene er avstemt så- In order to avoid bending of the first cooling body, spring-loaded bearing rollers 15 are advantageously placed on its free end, which repel part of its weight on the plastic pipe. This is possible because of the fixing of the pipe material that has already taken place without affecting the pipe inner surface. The subsequent cooling body 3' has support rollers 15 at both ends and supports its total weight on the plastic pipe 1 above support rollers 15- The mooring of the support rollers is adjusted so-
ledes at kjølelegemene 3>3' sentreres i rørmidten. is directed that the cooling bodies 3>3' are centered in the middle of the tube.
Det indre av kjølelegemene 3, 3' utføres derved som varmeutveksler 16, f.eks. rørbuntvarmeutveksler. The interior of the cooling bodies 3, 3' is thereby designed as a heat exchanger 16, e.g. tube bundle heat exchanger.
Tegningsfigur 1 viser en mulig utførelsesform Drawing figure 1 shows a possible embodiment
av innretningen ifølge oppfinnelsen uten dermed å være begrenset hertil. Figur II viser en mulig utførelsesform i detalj med hensyn til et kjølelegeme. of the device according to the invention without thereby being limited to this. Figure II shows a possible embodiment in detail with respect to a cooling body.
På figur I trer kunststoffrøret 1 ut av dysen In Figure I, the plastic tube 1 emerges from the nozzle
av rørverktøyet hvis dor 2 er forlenget ved kjølelegemene 3, 3' ifølge oppfinnelsen. For å unngå varmetap av doren, 2 befinner det seg mellom dor 2 og kjølelegemet 3 en isoleringsplate 4. Kjølelegemet 3>3' består i det vesentlige av dobbeltvegget rør, hvis ytre diameter er mindre enn den indre diameter av kunst-stoffrøret 1, således at det mellom begge består en ringspalte. Et kjølemedium, spesielt vann, føres i hulrommet mellom de of the pipe tool whose mandrel 2 is extended by the cooling bodies 3, 3' according to the invention. In order to avoid heat loss from the mandrel, 2 there is an insulating plate 4 between the mandrel 2 and the heatsink 3. The heatsink 3>3' essentially consists of a double-walled tube, the outer diameter of which is smaller than the inner diameter of the plastic tube 1, thus that there is an annular gap between both. A cooling medium, especially water, is passed in the cavity between them
to vegger av det dobbeltveggede kjølelegemet 353' mot eller med kunststoffrørets 1 ekstruksjonsretning, tilførsel og bort-føring av kjølemediet foregår ved hjelp av rørledninger 5 og 6. Ved hjelp av viften 7, 7<*>ved den til rørsprøytehodet til-eller bortvendte side omsettes luften i spalten mellom det ytre rom og indre rom av kjølelegemet 353' stadig i ekstruksjonsretning eller motsatt. Ved den til viftene 7, 7' oven-forliggende ender av kjølelegemet kan det befinne seg en strømningsgunstig formet luftinntredelsesspalte 10. Tilførsel-en av elektrisk energi for drivmotoren 13 for viftene 7, 7' samt også tilførsel og bortføring av kjølemedium foregår over hulrommet i doren 2 av rørsprøytehodet, som for dette formål utad må ha tilstrekkelig store utboringer. ;Første kjølelegeme 3 er varmeisolerende fastgjort på doren 2 av rørsprøytehodet og de etterfølgende kjølelegemer 3' er ved hjelp av forbindelsesstenger 1<*>1 forbundet stedfast og dreiesikkert med første kjølelegeme 3- For å unngå en for sterk gjennomhengning av kjølelegemet 13 på grunn av dets egen-vekt befinner det seg ved dets fri ender fjærende lagrende bæreruller 15- two walls of the double-walled cooling body 353' against or with the extrusion direction of the plastic pipe 1, the supply and removal of the coolant takes place with the help of pipelines 5 and 6. With the help of the fan 7, 7<*>at the side facing towards or away from the pipe spray head the air in the gap between the outer space and the inner space of the cooling body 353' is constantly exchanged in the direction of extrusion or the opposite. At the ends of the heat sink located above the fans 7, 7', there can be a flow-favorably shaped air entry gap 10. The supply of electrical energy for the drive motor 13 for the fans 7, 7' as well as the supply and removal of cooling medium takes place over the cavity in the mandrel 2 of the pipe sprayer head, which for this purpose must have sufficiently large bores on the outside. ;The first cooling body 3 is heat-insulatingly attached to the mandrel 2 of the pipe sprayer head and the subsequent cooling bodies 3' are by means of connecting rods 1<*>1 connected in a fixed and rotatable manner with the first cooling body 3- In order to avoid a too strong sagging of the cooling body 13 due to its own weight it is located at its free ends springy bearing bearing rollers 15-
Den omtalte innretning anvendes til ekstruksjon The mentioned device is used for extrusion
av kunststoffrør sammen med de hittil vanlige, utelukkende utenifra virkende kjøle- og kalibreringsinnretning 9, hvilket bare skjematisk er vist på figuren. of synthetic pipes together with the hitherto usual, exclusively externally acting cooling and calibration device 9, which is only schematically shown in the figure.
Figur II viser prinsippielt stillingen av første kjølelegeme 3 i detalj. Figure II basically shows the position of the first cooling body 3 in detail.
Betegnelsene stemmer overens med figur I. I en spesiell utførelsesform er her det indre av kjølelegemet 3 utført som rørbunt-varmeutveksler l6, idet rørene 17 av varme-utveksleren gjennomstrømmes av luft og rommet 18 av varmeut-veksleren som omgir rørene gjennomstrømmes av vann. The designations correspond to Figure I. In a special embodiment, the interior of the cooling body 3 is designed here as a tube bundle heat exchanger 16, with the tubes 17 of the heat exchanger being flowed through by air and the space 18 of the heat exchanger surrounding the tubes being flowed through by water.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752537588 DE2537588A1 (en) | 1975-08-23 | 1975-08-23 | DEVICE FOR MANUFACTURING LOW-TENSION PIPES FROM THERMOPLASTIC PLASTIC |
Publications (1)
Publication Number | Publication Date |
---|---|
NO762883L true NO762883L (en) | 1977-02-24 |
Family
ID=5954675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO762883A NO762883L (en) | 1975-08-23 | 1976-08-20 |
Country Status (10)
Country | Link |
---|---|
BE (1) | BE845423R (en) |
DE (1) | DE2537588A1 (en) |
DK (1) | DK378076A (en) |
FI (1) | FI762389A (en) |
FR (1) | FR2321999A1 (en) |
IT (1) | IT1076936B (en) |
LU (1) | LU75639A1 (en) |
NL (1) | NL7609277A (en) |
NO (1) | NO762883L (en) |
SE (1) | SE7609280L (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040047932A1 (en) * | 2002-09-09 | 2004-03-11 | Lupke Manfred A. A. | Pipe mold apparatus with contact and air cooling of plastic in a mold tunnel |
-
1975
- 1975-08-23 DE DE19752537588 patent/DE2537588A1/en active Pending
-
1976
- 1976-08-20 FI FI762389A patent/FI762389A/fi not_active Application Discontinuation
- 1976-08-20 IT IT26396/76A patent/IT1076936B/en active
- 1976-08-20 NO NO762883A patent/NO762883L/no unknown
- 1976-08-20 NL NL7609277A patent/NL7609277A/en not_active Application Discontinuation
- 1976-08-20 LU LU75639A patent/LU75639A1/xx unknown
- 1976-08-20 SE SE7609280A patent/SE7609280L/en unknown
- 1976-08-20 DK DK378076A patent/DK378076A/en unknown
- 1976-08-23 FR FR7625521A patent/FR2321999A1/en active Granted
- 1976-08-23 BE BE169998A patent/BE845423R/en active
Also Published As
Publication number | Publication date |
---|---|
FR2321999B3 (en) | 1979-05-18 |
BE845423R (en) | 1976-12-16 |
LU75639A1 (en) | 1977-03-31 |
DE2537588A1 (en) | 1977-02-24 |
DK378076A (en) | 1977-02-24 |
NL7609277A (en) | 1977-02-25 |
FI762389A (en) | 1977-02-24 |
SE7609280L (en) | 1977-02-24 |
FR2321999A1 (en) | 1977-03-25 |
IT1076936B (en) | 1985-04-27 |
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