• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The twin-nozzle extrusion head in accordance with the invention includes basically three axially spaced but radially overlapping annular housing members, together establishing two nozzle gaps and a first and a middle one of the two members are provided with annular feeder ducts for these nozzles. Each of these ducts has on its exit side a baffle ring wherein one baffle ring is effective on its radially inner surface while the second baffle ring is effective on a radially outer surface of larger diameter. These surfaces are nonround in a particular determined manner to establish nonuniform gap width related directly to the location of feed ducts for the annular channels, generally, the gaps are wider in locations away from a proximity of such feed ducts. The nozzle gaps are both frustoconical of different steepness and terminate in a common plane. The nozzles are particularly provided for disposing an adhesive on top of a steel pipe and a polyethylene coating and envelope on top of the adhesive.
    公开号:SU1109046A3
    申请号:SU823507922
    申请日:1982-11-03
    公开日:1984-08-15
    发明作者:Штуке Вальтер；Глиссманн Карл-Хайнц
    申请人:Маннесманн,Аг (Фирма)；
    IPC主号:
    专利说明:

     The invention relates to chemical engineering, in particular to devices for lining steel pipes with a layer of thermoplastic adhesive material, for example copolymer of polyethylene, and a layer of thermoplastic material, for example polyethylene. The closest in technical essence and the achieved result, the invention is an extrusion head for cladding steel pipes with a thermoplastic material, comprising a first housing ring, an intermediate ring and a second housing ring arranged sequentially one after the other, the first housing ring and the intermediate ring being assembled to form between them is an annular gap for the flow of adhesive material, connected to the annular channel for the supply of material, and the positive side of the intermediate ring is opposite, and Roe case ring mounted to form an annular gap for the flow of thermoplastic communicated with an annular channel for supplying a thermoplastic wherein the outlets of both annular gaps disposed in a common plane, and in annuli mounted retaining ring. In this extrusion head in the intermediate ring, heating elements are located, and the retaining rings are mounted in the same plane, and are made with the same diameters of the working surface. The retaining rings are located eccentrically movable relative to their longitudinal axis by means of screws, and their working surfaces have an elliptical shape; this ensures a uniform thickness of the layer around the circumference, the steel pipe of the adhesive material and the thermoplastic SI However, in the well-known Head, the subplates of the rings move during operation at a relatively high working pressure of the adhesive material and the thermoplastic with great effort, which leads to permanent deformation of the supporting rings and uneven coating of the pipe, because of which it is necessary to replace the retaining rings. Due to the location of the ring shackles and ring eBors, the adhesive material and the thermoplastic material pass a relatively long way with increased back pressure at high operating temperatures. At the same time, decomposition phenomena occur in the temperature-sensitive adhesive material, which leads to deterioration of the adhesion strength of the lining, corrosion of the internal parts of the extrusion head due to the acid released at the same time, and this reduces the adhesion strength of the coating to the steel pipe. The aim of the invention is to improve the quality and strength of adhesion of the coating to the steel pipe by reducing the length of the substrate to the pipe of the adhesive material. The goal is achieved in that in an extrusion head for cladding steel pipes with a thermoplastic material containing a first housing ring, an intermediate ring and a second housing ring installed in series with each other, the first housing ring and the intermediate ring are mounted to form an annular gap between them. material communicated with the annular channel for the supply of material, and the opposite side of the intermediate ring and the second body ring are mounted to form an annular gap for a thermoplastic flow connected to an annular channel for supplying a thermoplastic, the outlet openings of both annular gaps are located in a common plane, and retaining rings are mounted in the annular channels, the annular channel for supplying a thermoplastic is arranged in an intermediate ring, and the retaining rings are fixed, and one of the retaining rings with the inner working surface is placed in the annular channel for the adhesive material, and the other with the outer working surface is mounted in the rings m channel for thermoplastic, and the average diameter of the annular channel for the supply of adhesive material and the diameter of the working surface installed in it retaining ring is chosen smaller than the average diameter of the annular channel thermopl-asta and the diameter of the working surface of the retaining ring, and the annular gap for the adhesive material in section along: longitudinal AXIS EXTRUSION. the heads are straight, linear; In addition, the working surfaces of the retaining rings in the cross section of the SRI are formed by at least four segments of a circle with at least three different radii. In the retaining ring, installed in the annular channel for the thermoplastic, there is no hole on the supply side of the material; recess. . FIG. 1 shows an extrusion head: a longitudinal section; in: FIG. 2 is a section A-A in FIG. in fig. 3 is a section BB in FIG. one; in fig. 4 - retaining ring placed in an annular channel for adhesive material; Fig. 5 shows a retaining ring placed in the annular channel for the thermoplastic; in fig. 6 - retaining rings placed in an extrusion head. The extrusion head comprises a first quasi ring 1, an intermediate ring 2 and a second casing ring 3. The first casing ring 1 and the intermediate ring 2 are mounted to form between them an annular gap 4 for the flow of adhesive material communicated with the annular channel 5 for supplying material . The opposite side of the intermediate ring 2 and the second body ring 3 are mounted to form an annular gap 6 for the flow of a thermoplastic in communication with the annular channel 7 for supplying the thermoplastic. The outlets of both annular gaps 4 and 6 are located in a common plane 8. Retaining rings 9 and 10 are mounted in annular channels 5 and 7. An annular channel 7 for supplying thermoplastic is made in intermediate ring 2. Retaining rings 9 and 10 are fixed, and the supporting ring IO with the inner working surface I1 is located in the annular channel 5 for the adhesive material, and the retaining ring 9 with the outer working surface I2 is mounted in the annular channel 7 for supplying the thermoplastic. The average diameter of the annular channel 5 for the supply of adhesive material and the diameter of the working surface of the retaining ring 10 installed in it are chosen to be smaller than the average diameter of the annular channel 7 for the thermoplastic and the diameter of the working surface of the retaining ring 9 installed there. The annular gap 4 for the adhesive material in cross section along the longitudinal axis of the extrusion head, is made linear. In the retaining ring 9, an annular recess 13 is made on the material supply side for uniform distribution of the material. The working surfaces II and 12 retaining rings 9 and 10 in the transverse section are formed by at least four segments of a circle with at least three different radii. Through the hole 14 in the first corpus I ring, the adhesive material from the extruder is not shown). With the help of two holes 15 and 16, thermoplastic was supplied from the extruder. The operation of the extrusion head is as follows. A steel pipe is fed through the extrusion head and glue D material is applied to it through the annular gap 4, and through the annular gap 6 a thermoplastic enters the layer of adhesive material in the common plane 8. In the installation of retaining rings 9 and 10 in annular channels 5 and 7, it ensures an even distribution in flowable materials. The inner working surface 11 (.4J of the retaining ring 10 is formed from three radii R., Rj Rj Radii R, and Rj are the same in magnitude. Their central points M and Mj are in the center point of the retaining ring 10. Radius R describes an angle equal to 60 ° , in the area of the hole 14, and the radius I is the angle equal to 140, in the opposite region. Adjacent to these areas, both radii Cj describe around their central points in an angle equal to 80 °. The central points Mj are located on a common line offset from the central horizontal lines, and relative but differently. Due to this arrangement, the width of the annular channel 5 in the area of supplying adhesive material is smaller than in the opposite region, and the annular channel expands continuously. The outer working surface 12 (Fig. 5) of the retaining ring 9 is formed of three radii i ,,, Rg and ftg, ii; eHTral points Mc, Mg k M are Ea of the common center line and at a distance from each other.The radius Cif is in the area of the holes 15 and 16, an angle equal to 30. The radii of fig are offset from each other other M dots describe the angle of 5 9 °. The radii Rg with the points shifted relative to each other are adjacent to the segments formed by 1m radii g and describe angles equal to 32. The working surface 12 thus formed provides a gap in the annular canape 7 which is smaller in the region of the holes 5 and 16 than in the offset 90 relative to the area of the holes 15 and 16 of the area of the annular channel 7,
    Depicted in FIG. 2-5 making extruded heads
    : refers to an adhesive material consisting of polyethylene acrylic unsaturated ester with a viscosity of l 2 and a layer thickness of 0.2-0.3 mm. A thermoplastic is polyethylene with a viscosity of 2, 3, and 0.4 and a layer thickness of 1.6-2.2 mm i
    When using an adhesive material and a thermoplastic with different viscosities, retaining rings are installed in the extrusion die, which form different gap widths for the annular channels. The radius and distance between their central points should be the larger, the more viscous the adhesive material and the thermoplastic are applied.
    The use of the invention will allow to obtain a high-quality and durable coating of steel pipes with various tremoplastic materials.
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    权利要求:
    Claims (3)
    [1]
    (57) 1 EXTRUSION HEAD FOR FACING STEEL PIPES WITH THERMOPLAST, comprising first housing ring, an intermediate ring and a second housing ring installed in series with each other, the first housing ring and the intermediate ring being mounted to form an annular gap between them for the flow of adhesive material in communication with an annular channel for supplying material, and the opposite side of the intermediate ring and the second housing ring are mounted with the formation of an annular gap for the flow of thermal hundred communicated with an annular channel for the thermoplastic material supply, with the outlets of both, characterized in 'that, with · to improve the quality and durability of coating adhesion annular gaps disposed in a common plane, and 4 in annuli mounted retaining ring of the steel pipe due to reducing the length of the supply of adhesive material to the pipe, the annular channel for supplying thermoplastics is made in the intermediate ring, and the retaining rings are fixed, one of the retaining rings having an inner working surface placed in the annular channel for adhesive material, and the other with the outer working surface mounted in the annular channel for supplying thermoplastic, and the average diameter of the annular channel for supplying adhesive and the diameter of the working surface of the retaining ring installed in it are selected smaller than the average diameter of the annular channel for thermoplastic and the diameter of the working surface of the retaining ring installed in it, and the annular gap for the adhesive material in section along the longitudinal axis of the extrusion head is made straight linear.
    [2]
    2. The extrusion head according to π. 1, characterized in that the working surfaces of the retaining rings in cross section are formed by at least four segments of a circle with at least three different radii.
    [3]
    3. Extrusion head according to π. 1, with the fact that in the retaining ring installed in the annular channel for thermoplastic, '' an annular recess is made on the supply side of the material.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1109046A3|1984-08-15|Extrusion head for facing steel pipes with thermal resin
    CA2032480C|2001-06-19|Continuous extrusion apparatus
    US4298325A|1981-11-03|Die for the extrusion of material in tube form
    US3809515A|1974-05-07|Extrusion die for blowing plastic film
    EP0046789B1|1984-11-28|Coextrusion die
    US3308508A|1967-03-14|Die
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    US4187067A|1980-02-05|Die for producing plastic resin pellets
    KR0175521B1|1999-05-01|Extrusion head for the manufacture of tube shaped preforms made from an extrudable polymer
    US4547246A|1985-10-15|Extrusion method
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    US7381042B2|2008-06-03|Nozzle head for an extruder
    US4173446A|1979-11-06|Choke ring for pipe extrusion die
    US5690971A|1997-11-25|Tiltable extrusion die having sealing lip connected by thin annular zone
    JP2005523151A|2005-08-04|Die lip for strip coating
    FI79971C|1990-04-10|Extruder
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    KR100924789B1|2009-11-03|The coating device of pipe
    US4495022A|1985-01-22|Extrusion method and apparatus
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    RU1786512C|1993-01-07|Extrusion head
    FI63888B|1983-05-31|TVAERSPRUTNINGSMUNSTYCKE FOER OEVERDRAGNING AV LEDNINGAR ELLERKABLAR
    SU1723588A1|1992-03-30|Device for application of two-layer sheaths over cables
    EP0074812A2|1983-03-23|A method of and apparatus for producing multi-layered plastics products
    同族专利:
    公开号 | 公开日
    US4484877A|1984-11-27|
    GB2110158B|1985-08-14|
    IT8223753D0|1982-10-14|
    AT384774B|1988-01-11|
    CA1203961A|1986-05-06|
    FR2517249B1|1986-06-06|
    DE3147709A1|1983-06-09|
    BE895099A|1983-03-16|
    GB2110158A|1983-06-15|
    FR2517249A1|1983-06-03|
    NL8203995A|1983-06-16|
    DD204882A5|1983-12-14|
    DE3147709C2|1984-12-06|
    ATA393882A|1987-06-15|
    引用文献:
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    US2978748A|1958-02-06|1961-04-11|Koppers Co Inc|Die for extruding tubular plastic film|
    US2987766A|1958-11-10|1961-06-13|Allied Chem|Apparatus for shaping high molecular weight thermoplastics|
    GB892302A|1959-12-29|1962-03-28|Fawcett Preston & Co Ltd|Improvements in an extrusion head for the simultaneous application of two layers of thermoplastic material to an inner core|
    US3957942A|1969-02-20|1976-05-18|Rol|Process of coating an elongated support|
    US3605190A|1969-06-24|1971-09-20|Nrm Corp|Extruder crosshead|
    DE1957078C3|1969-11-10|1979-09-20|Mannesmann Ag, 4000 Duesseldorf|Extruder head|
    US3899276A|1973-05-29|1975-08-12|Beloit Corp|Annular extrusion die with back pressure control|
    DE2332518A1|1973-06-22|1975-01-23|Siemens Ag|SPRAY HEAD|
    DE2557718C3|1974-12-28|1979-11-15|Toyoda Gosei Co. Ltd., Nagoya |Device for making reinforced hoses|
    US4042661A|1976-01-23|1977-08-16|Crown Zellerbach Corporation|Method and apparatus for forming tubular multilaminate plastic film|
    ZA801489B|1979-04-06|1981-03-25|Durapipe Ltd|A method of and apparatus for extruding plastics products|
    US4280801A|1979-05-30|1981-07-28|Crompton & Knowles Corporation|Crosshead|
    DE3122043C2|1981-05-29|1984-06-14|Mannesmann AG, 4000 Düsseldorf|Method for sheathing a steel pipe|US4600550A|1984-04-27|1986-07-15|Cloeren Peter|Coextrusion process for overcoming the curtaining effect|
    US4711623A|1986-05-13|1987-12-08|Mobil Oil Corporation|Annular extrusion die with internal choke ring and spider mandrel|
    US4723902A|1986-08-21|1988-02-09|Wheeling Stamping Company|Balanced flow extrusion crosshead and die assembly|
    US4738611A|1987-03-04|1988-04-19|Graham Engineering Corporation|Cross head die|
    FR2625941A1|1988-01-14|1989-07-21|Mcneil Akron Repiquet Sarl|Head for continuous extrusion or coextrusion with multiple annular orifices|
    US4941812A|1988-05-10|1990-07-17|E. I. Du Pont De Nemours And Company|Spinneret for production of a hollow filament within a hollow filament composite fiber having spacing means|
    US5324187A|1991-06-28|1994-06-28|Cook Warren R|Co-extrusion apparatus|
    US5643618A|1994-05-11|1997-07-01|General Mills, Inc.|Apparatus for making multiple, complexly patterned extrudates|
    US5769128A|1995-11-02|1998-06-23|Central Sprinkler Company|Multilayer fluid conduits|
    WO1997016299A1|1995-11-02|1997-05-09|Central Sprinkler Company|Apparatus and method for making multilayer fluid conduits|
    US5775378A|1995-11-02|1998-07-07|Central Sprinkler Company|Fluid conduit systems and methods for making|
    US5843503A|1997-02-24|1998-12-01|General Mills, Inc.|Apparatus and method for making multiple patterned extrudates|
    US5804222A|1997-04-29|1998-09-08|Brown; Jearl D.|Co-extrusion head for coating wire|
    US6293311B1|1998-05-22|2001-09-25|Pmd Holdings Corp.|Multilayer composite pipe fluid conduit system using multilayer composite pipe and method of making the composite|
    FR2785967B1|1998-11-16|2000-12-08|Inst Francais Du Petrole|THERMALLY INSULATED CONDUCT AND FARICATION METHOD|
    FR2785968B1|1998-11-16|2001-01-12|Inst Francais Du Petrole|THERMALLY INSULATED CONDUCTION BY ELASTOMERIC MATERIAL AND METHOD OF MANUFACTURE|
    US6251452B1|1999-04-23|2001-06-26|General Mills, Inc.|Apparatus and methods for making multiple, complexly patterned extrudates|
    US6383535B1|2000-03-16|2002-05-07|Bestfoods|Extruded potato casing and method of making|
    US6620448B2|2001-10-29|2003-09-16|Recot, Inc.|Extruder die with additive reservoir|
    US7585532B2|2001-10-29|2009-09-08|Frito-Lay North America, Inc.|Apparatus and method for improving the dimensional quality of extruded food products having complex shapes|
    US6854970B2|2001-10-29|2005-02-15|Frito-Lay North America, Inc.|Extruder die injection nozzle|
    US7252847B2|2001-10-29|2007-08-07|Frito-Lay North America, Inc.|Flavored extruded food product|
    US7648352B2|2001-10-29|2010-01-19|Frito-Lay North America, Inc.|Apparatus for imprinting lines on direct-expanded food products having complex shapes with improved dimensional quality|
    EP1916087A1|2006-10-26|2008-04-30|Drossbach GmbH & Co. KG|Device for applying plastic to a workpiece|
    US20100000170A1|2008-07-03|2010-01-07|Parks Jerry M|Pre-Applied Waterless Adhesive On HVAC Facings With Sealable Flange|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3147709A|DE3147709C2|1981-11-27|1981-11-27|Extruder head for sheathing a steel pipe|
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