• 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:
    1. The method of coating steel pipes with thermoplastic Polymeric material, including extruding two strips of film, duplicating them to form a two-layer stepped tape, winding it along a helix on a rotating and longitudinally moving pipe and rolling, which is different in that and quality of the coating, the film strips are produced by the blowing method in the form of a seamless sleeve with its subsequent longitudinal cutting at the outlet of the extruder's bushing head into two parts with a semicircular cross chnym section, which then has a flat offset one. relative to another and serves for duplication. : d: AE 30
    公开号:SU1153819A3
    申请号:SU813367931
    申请日:1981-12-22
    公开日:1985-04-30
    发明作者:Ландграф Хельмут
    申请人:Маннесманн,Аг (Фирма)；
    IPC主号:
    专利说明:

    2. The method according to claim 1, about tl and h ayushi and with the fact that the displacement of the tapes choose the equal half of the feed pipe for one turn.
    3. The method according to claim 1, wherein the cutting thickness of the wall is two times smaller than the thickness of the seamless sleeve
    4. A device for coating steel pipes with thermoplastic polymers with a material that includes extra cores with a head located above the winding zone to obtain strips to the film, a mechanism for their duplication and rolling, means for rotating and moving the pipe, in order to improve the performance and quality of the coating the extruder is blown to obtain a seamless sleeve with an annular slot tapered in two opposite places where electrically heated knives are installed, and located vertically down and on the side of the laying area of the tape, and under the head, in front of the mechanism duplicating the film web against each other, the guide rollers are mounted to lay out the film web.
    The invention relates to a method and an inventive device for coating steel pipes with a thermoplastic synthetic material, in particular polyethylene, and around spiral-wound and longitudinally displaceable pipes wound along a helix of thermoplastic films in the form of strips using adhesive adhesive.
    There is a method of coating steel pipes with a thermoplastic polymer material, including the extrusion of two strips of film, their duplication with the formation of a two-layer stepped tape, its winding along a helix on a rotating and longitudinally moving pipe and rolling lj.
    According to a known method, strips of thermoplastic material are extruded with slotted heads and immediately after this are wound around cleaned and heated pipes. As an adhesive adhesive, a strip of adhesive material is used, which is extruded simultaneously with a strip of synthetic material using a special slotted head and is wound around a pipe. The extruded strips of synthetic material are thus guided in such a way that their
    The edges overlap one another and are welded together.
    When using high molecular weight polyethylene with higher density, e.g., P, 95, when generating through a slit head, large pressures occur, causing a significant decrease in productivity compared to the use of lower density polyethylene. In addition, with an unfavorable distribution of the flow in the slotted heads, there are additionally surface disturbances in the outgoing extrusion product, which prevent welding over the entire surface of the winding layers.
    With a symmetrical rotational distribution of the flow, as it is in extrusion tools for producing thermoplastic cross sections of a ring, significant improvements in the quality of the extrusion product, respectively, of the output compared to carrying a rotational distribution of the flow, for example, in slotted heads, that can be used For example, in the manufacture of extruded thermoplastic films.
    However, in the implementation of the known method, in which pipe coating with polyethylene is achieved by multilayer winding in a heated state, and the winding layers are welded over the entire surface, such an improvement cannot always be achieved, since the flat laying of the cut, in one place, cross-section is circular in shape at a flat belt cross-section, with the dimensions considered, it is possible only at extended intervals, if this does not allow stretching of the film edge. Working with a freshly extruded thermopaste film with the above dimensions is difficult due to the tendency of the films to stick and cool the film. It is also known a device for coating steel pipes with a thermoplastic polymeric material, comprising an extruder with a head located above the winding zone for producing film strips, a mechanism for duplicating and stitching, means for rotating and displacing the pipe lj. The known device does not provide good quality lokraty in a wide range of polymeric materials with increased productivity. The aim of the invention is to increase the productivity and quality of the coating. This goal is achieved by the fact that according to the method, including extrusion of two layers of a film, their duplication with the formation of a two-layer stepped tape, winding it along a helical line onto a rotating and longitudinally moving tube and rolling strip, the film is blown up by the method of blowing in the form of a seamless sleeve followed by a longitudinal by cutting it at the exit from the extruder head into two parts with a semicircular cross section, KOToi, i.e., then flatten one with the other relative to the other and fed to a duplicate s. Moreover, the displacement of the tapes is chosen equal to half the feed pipe per revolution. . In addition, at the cut points, the wall thicknesses are half the thickness of the seamless sleeve. This goal is achieved by the fact that in a device for coating welded pipes with a thermoplastic polymer material, including an extruder with a head located above the winding zone to produce film strips, a mechanism for duplicating and sticking them, means for rotating and moving the pipe, the extruder head is blown to obtain a seamless sleeve an annular gap, narrowed in two opposite places, in which electrically heated knives are installed, and is located vertically down and to the side of the ribbon laying area, and under the head In front of the mechanism, duplicating 1 m with the film web displaced relative to each other, the guide rollers are mounted for laying out the film web. FIG. 1 shows a diagram of the device j in FIG. 2 and 3 — an extruder head in two projections; FIG. 4 is a schematic of the device with the head positioned on the side of the pipe. The steel pipe 1 being moved is moved forward in a known manner by means of driving rollers 2 in the form of a helical line with a lift of 200 mm. On the side above the pipe 1, mounted to an extruder (not shown) is a swivel head 3, which has an annular gap 5 with a diameter of 635 mm and thickness t mm for the production of a film in the form of a seamless sleeve 4. The annular gap is narrowed in two opposite points 6 and 7 to 0.5 mm. Directly below these exit points, there are two electrically heated separating knives 8 and 9, which divide the seamless sleeve 4 produced in the sensing head 3 into two films 4a and 4b in length. The blow head 3 is approximately at a predetermined distance above the top of the pipe 1 and offset from 0.5 to 1.0 mm to the side. It can be rotated for adjustment around its axis and fixed in the corresponding position. A pair of rollers 10 and 11 is located below the drill head 3 approximately at a distance of the cross-sectional diameter of the outlet. If necessary, the device can have the following intermediate roller and planes located in the formed by the knives
    a dividing wall in order to prevent undesirable contact of both sections of thermoplast and to ensure perfect flat folding of the halves of the film 4a and 4b in a semicircular shape. The rollers are coated with Teflon or silicone rubber and mounted for free rotation. The resulting flat cross-sections, which (due to the corresponding rotation formed by both separating knives 8 and 9 straight relative to the pipe axis) are displaced one relative to the other by about 100 mm, are welded into a stepped double film located directly below them with coated rollers 12 and 13 which are resiliently pressed against one another. The number of revolutions of the rollers 12 and 13 and the rate of release from the sensing head 3 are matched with the peripheral speed of the pipe 1 so that the thermoplastic films 4a and 4b are reduced (stretched) between the exit and the overlap of the steel pipe by a factor different about 2, and between the rollers 12 and 13 and the retractable rollers 14 form a slack.
    The head 3 may be located to the side of the top of the pipe 1. (Fig. 4). With this arrangement of the head, after cutting the film 4q and 4b, it enters the guide rollers 15 and, 16 and is duplicated with rolling 17 at the same time.
    The method is implemented as follows.
    0 When extruding from the head 3, a seamless thermoplastic sleeve 4 is injected, due to the constriction of the collar gap 5 in two opposite locations 6 and 7, halved compared to the specified wall thickness. The resulting seamless sleeve 4 at the exit of the head 3 is cut with electrically heated knives in and 9 into two
    0 films 4a and 4b with semicircular cross sections, which are arranged with rollers 10 and 11, and duplicated with rollers 12 and 13. Through the rollers 14, the films are wound and rolled onto pipe 1 which rotates and moves through the rollers 2.
    The use of the invention provides high performance, high-quality coating.
    steel pipe thermoplastic material.
    (rig 2
    ig, 3
    (rigging
    L
    权利要求:
    Claims (4)
    [1]
    1. The method of coating steel pipes with a thermoplastic Polymeric material, including extrusion of two film strips, their duplication with the formation of a two-layer stepped tape, its winding along a helical line on a rotating and longitudinally moving pipe and weld, characterized in that, in order to increase productivity and quality coatings, film strips are obtained by blowing in the form of a seamless sleeve with subsequent longitudinal cutting it at the exit from the extruder's extruder head into two parts with a semicircular transverse HAND, which then has a flat offset one. relatively different and served for duplication.
    61U1‘91T ns
    [2]
    2. The method according to π.1, with the fact that the displacement of the tapes is chosen equal to half the feed pipe for one revolution.
    [3]
    3. The method according to claim 1, with the fact that in the places of cut the wall thickness is performed two times less than the thickness of the seamless sleeve.
    [4]
    4. A device for coating steel pipes with a thermoplastic polymer material, including an extruder with a head located above the winding zone to obtain film strips, a mechanism for their duplication and rolling, means of rotation and movement of the pipe, characterized in that, in order to increase ί productivity and coating quality, the extruder head is blown to obtain a seamless sleeve with an annular gap narrowed in two opposite places in which electrically heated knives are installed, and is located vertically down and on the side of the tape-laying zone, and under the head in front of the mechanism, which duplicates the film of the film with offset relative to each other, guide rollers are mounted for laying out the film sheet.
    类似技术:
    公开号 | 公开日 | 专利标题
    US4466854A|1984-08-21|Method and device for producing a helically wound tube
    US4676728A|1987-06-30|Apparatus for gauge distribution in plastic tubing
    US6231711B1|2001-05-15|Methods and apparatus for making paint roller covers with thermoplastic cores
    SU1153819A3|1985-04-30|Method of coating steel pipes with thermoplastic polymeric material and device for effecting same
    ES8706065A1|1987-06-01|Flattening and take-off apparatus for blown tubular plastics films.
    US2862350A|1958-12-02|Process and apparatus for producing pellets from thermoplastic sheet material
    US3180909A|1965-04-27|Process and apparatus for forming tubular films and the like
    US4254175A|1981-03-03|Multilayer thermoplastic film laminate
    US3758370A|1973-09-11|And products resulting therefrom method for manufacturing a multi ply board of thermoplastic material
    US3576935A|1971-04-27|Apparatus for and method of gauge distribution in plastic tubing
    US4701361A|1987-10-20|Tubular film with transverse closure strips
    CA2121165C|2003-05-20|Production of cross-laminated film from tube
    US3300555A|1967-01-24|Manufacture of plastic tubes
    US3914147A|1975-10-21|Apparatus and method for the continuous production of wound pipes
    US3635634A|1972-01-18|Apparatus for manufacturing tubular films of thermoplastic resins
    US4808099A|1989-02-28|Apparatus for making tubular film with transverse closure strips
    JPH0628892B2|1994-04-20|Method of manufacturing cladding tube with hollow spiral rib
    US3801036A|1974-04-02|Production of thermoplastic films
    US4063988A|1977-12-20|Machine and method for forming continuous tubing
    US3819788A|1974-06-25|Extruded plastic films and method for forming the same
    GB744977A|1956-02-15|Improvements in or relating to the production of films of thermoplastic materials
    US2995990A|1961-08-15|Apparatus for the production of gusseted tubing
    US4383968A|1983-05-17|Method and apparatus for producing multi-layer expanded films
    US3245117A|1966-04-12|Apparatus for manufacturing continuous film
    US4753767A|1988-06-28|Extrusion apparatus and method
    同族专利:
    公开号 | 公开日
    FR2501105A1|1982-09-10|
    DE3109216A1|1982-09-30|
    NL8105735A|1982-10-01|
    GB2094437A|1982-09-15|
    GB2094437B|1984-10-03|
    US4501632A|1985-02-26|
    DE3109216C2|1984-06-07|
    FR2501105B1|1987-01-02|
    JPS57157720A|1982-09-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2454592C2|2006-12-14|2012-06-27|САИПЕМ С.п.А.|Pipe connection method, device for creating underwater pipelines and ship for laying underwater pipeline, which contains above described device|LU33023A1|1900-01-01|
    NL302698A|1962-12-31|1900-01-01|
    US3356556A|1964-05-11|1967-12-05|Int Paper Co|Method and apparatus for coating substrates with films of uniform thickness|
    DE1511928A1|1966-11-03|1970-02-26|Alkor Oerlikon Plastic Gmbh|Carrying bag|
    DE1704562A1|1967-01-14|1971-05-19|Hans Dentler|Method and device for producing a plastic film, in particular for carrier bags|
    US3616123A|1968-01-29|1971-10-26|Johns Manville|Helicoid laminate comprising several continuous tiered strips|
    DE1771764B1|1968-07-05|1972-03-09|Mannesmann Ag|Method for sheathing a steel pipe|
    US3617415A|1969-04-23|1971-11-02|Manfred Hawerkamp|Method of making hollow reinforced bodies|
    FR2088414B1|1970-05-08|1974-09-06|Gunze Kobunshi Ogyo Kk|
    US3969170A|1971-10-22|1976-07-13|Mannesmann Aktiengesellschaft|Method for making a thermoplastic sleeve to be used as coupler fitting for tubes|
    DE2213748A1|1972-03-22|1973-09-27|Continental Gummi Werke Ag|Extrusion press for flat strip - produces tubular extrusion then slits it longitudinally into parallel strips|
    US3945403A|1973-04-19|1976-03-23|Minigrip, Inc.|Tube construction for fastener profile strips|
    NL162864C|1974-02-12|1980-07-15|Mannesmann Ag|METHOD AND APPARATUS FOR WRAPPING A STEEL TUBE WELDED WITH A THERMOPLASTIC PLASTIC|
    DE2710705C3|1977-03-09|1985-10-03|Mannesmann Ag, 4000 Duesseldorf, De|
    US4130453A|1977-07-28|1978-12-19|The Kendall Company|Pipe coating method and apparatus|
    US4211595A|1978-10-10|1980-07-08|The Kendall Company|Method of coating pipe|
    DE2900597C2|1979-01-05|1981-01-29|Mannesmann Ag, 4000 Duesseldorf|Device for coating steel pipes with thermoplastic material|JPS5991025A|1982-11-16|1984-05-25|Kubota Ltd|Device for covering pipe|
    GB2161721B|1984-07-20|1988-02-24|Nippon Steel Corp|Precoated corrosion-resistant steel pipe piles for marine use, and structure thereof|
    US5145628A|1989-12-29|1992-09-08|Rudolph Karg|Process for manufacturing a hose clad with ultra-high molecular weight polyethylene|
    US5178902A|1990-12-21|1993-01-12|Shaw Industries Ltd.|High performance composite coating|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19813109216|DE3109216C2|1981-03-05|1981-03-05|Method and device for sheathing a steel pipe|
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