CN101003173A - Method and equipment for producing steel-plastics composite tube with two layers of polymer layer - Google Patents
Method and equipment for producing steel-plastics composite tube with two layers of polymer layer Download PDFInfo
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- CN101003173A CN101003173A CNA2006100201720A CN200610020172A CN101003173A CN 101003173 A CN101003173 A CN 101003173A CN A2006100201720 A CNA2006100201720 A CN A2006100201720A CN 200610020172 A CN200610020172 A CN 200610020172A CN 101003173 A CN101003173 A CN 101003173A
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Abstract
A method for preparing the composite steel-plastics pipe with two polymer layers includes such steps as providing steel plate or steel band with holes, longitudinal curving or spiral rolling, welding to become a cylindrical metal skeleton, using an extruder to extrude out the fused polymer and make it to pass through the holes for wrapping the metal skeleton to form pipe wall, using another extruder to extrude out the fused polymer but make it not to pass through holes to form a polymer layer on formed pipe wall, and cooling. Its apparatus is also disclosed.
Description
Technical field:
The present invention relates to a kind of steel-plastics composite pipe production method, what be particularly related to is that the molten polymer that a kind of extruder is extruded passes the clad tube wall that pertusate tubular metallic framework forms metallic framework, extrudes the production method and the device of the skin (or internal layer) that is compounded to form steel-plastics composite pipe again.
Background technology:
Existing with pertusate metallic framework do enhancing body, extrude composite polymeric materials and mainly contain three kinds of forms as the method and apparatus that non-individual body becomes the skeleton coating production technology of steel-plastics composite pipe on this skeleton: first kind as BP GB2255,148A92.10.28, Chinese patent application numbers 99112221.6,99232026.7, these disclosed technical schemes are that steel plate with hole with holes is through being curled into cartridge type longitudinally and being welded as the cartridge type metallic framework, metallic framework is pushed or draws in the compound die head of the polymer that molten plastic runner and forming cavity are arranged or forming cavity mould that is connected with plastic extruder, the hole that the polymer non-individual body of fusion passes metallic framework forms the ectonexine tube wall simultaneously at the surfaces externally and internally of metallic framework skeleton is coated, pass through cooling and shaping, just produced the composite metal plastic pipe that metallic framework strengthens the tube wall that is coated with metallic framework; Second kind as patent 94104509.9, the broadwise steel wire twines steel radial through the steel wire tubular metallic framework that is welded, stretch into the polymer that the extrusion die in the steel wire tubular metallic framework of welding fabrication is extruded, the hole that passes metallic framework forms the ectonexine tube wall simultaneously at the surfaces externally and internally of metallic framework and skeleton is coated forms composite metal plastic pipe; The third is 200510022044.5 as number of patent application, and molten mass does not pass the hole of metallic framework and extrudes compound sandwich layer pipe at inner wall of metal tube, extrudes the composition polymer outer tube in the appearance of metallic framework again.But the hole that passes metallic framework by the polymer non-individual body that the technical scheme in the above-mentioned several patents is fusion forms the ectonexine tube wall simultaneously, there is very big defective in this molding mode, the polymer non-individual body of fusion is translated into the mutual again molten adhere of another side at the hole that passes metallic framework, the Turbulence Flow mode that this polymer is crossed metallic framework can stay a lot of residual stress in cooled plastic tube wall, cause in the pipeline use easy to crack, reduced the service life of pipeline, and this type of flow can be destroyed and extrude compound or spraying or cover the particularly very thin one deck adhesive layer in the hole of metallic framework surfaces externally and internally, cause polymer non-individual body and metallic framework surface directly to combine rather than be combined with each other securely each other by adhesive layer, and the polymer non-individual body is an apolar surfaces, the metallic framework surface is a polar surfaces, the two can not be real mutual strong bonded, cause in transportation or installation or delamination mutually in using, in addition, the mutual molten adhere face of polymer causes temperature to descend to some extent owing to cross metallic framework, has also influenced the reliability and the intensity of mutual molten adhere.In order to improve metallic framework and polymer is combined closely mutually, the applicant applied for 03117307.1＜at the continuous process units of steel-plastics composite pipe that hole steel skeleton surfaces externally and internally application binding agent is arranged〉and patent, before extruding composition polymer mechanism the binding agent applying mechanism that can all adhere to binding agent by the hole of tubular steel skeleton at the steel skeleton surfaces externally and internally is simultaneously arranged, promptly earlier the hole of binding agent by the tubular steel skeleton adhered at the steel skeleton surfaces externally and internally, again polymer-extruded hole by the tubular steel skeleton is formed interior outer plastic layer at the steel skeleton surfaces externally and internally, the manufacture method that this binding agent and polymer all will pass the hole of tubular steel skeleton has a shortcoming, be that polymer is when passing the hole of tubular steel skeleton, can will stick to the lip-deep binding agent of steel skeleton washes away, polymer is directly contacted with the steel skeleton surface again, binding agent does not play a role, the mutual strong bonded that polymer and steel skeleton surface can not be real.
Summary of the invention:
The objective of the invention is in order to overcome above deficiency, provide a kind of and can solve the metallic framework in the metallic skeleton reinforced composite plastic pipe and the interface affinity problem of polymer non-individual body, can produce bearing capacity height, anti-corrosion capability strong, have a production method of the steel-plastics composite pipe of two kinds of performance plastic layer tube walls.Another object of the present invention is for a kind of process units of steel-plastics composite pipe is provided.
The object of the present invention is achieved like this:
The present invention has the production method of the steel-plastics composite pipe of two layers of polymer thing layer, comprise pertusate steel plate or steel band buckling moulding or screw winding moulding and be welded into the tubular metallic framework, or the broadwise steel wire twines the warp-wise steel wire through the cylindrical skeleton that is welded, utilize two extruders at least, wherein runner and forming cavity and the core of the molten polymer extruded of extruder by extrusion die passed hole tubular metallic framework, skeleton is coated the formation tube wall, runner and forming cavity and the core film of the molten polymer that another extruder is extruded subsequently by extrusion die will be under the situation of not passing the tubular metallic framework, internal layer or outer compound one layer of polymeric layer at established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping, utilize at least two extruders can produce steel-plastics composite pipe with two kinds of performance plastic layer tube walls, wherein runner and forming cavity and the core of the polymer that polar group is arranged extruded of extruder (as by crosslinked with silicane (or crosslinkable) polymer that has carboxyl or polyethylene or polypropylene hydroxyl or carbonyl polar group or that polarity is arranged or polar group is arranged through graft modification) by extrusion die passed hole tubular metallic framework again, skeleton is coated the formation tube wall, solve metal and compound the two interface of polyethylene and be difficult for that secure bond is compound to be the technical barrier of one, the molten polymer that another extruder is extruded subsequently is under the situation of not passing the tubular metallic framework, at the internal layer or the outer compound one layer of polymeric layer of established tube wall, this strata compound can be common polythene (HDPE) or polypropylene (PP) or non-crosslinked heatproof polyethylene (PE-RT).
The production method of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, the wherein runner of the extrusion die of an extruder of at least two extruders is the cylindrical arranged around at the tubular metallic framework, this molten polymer of extruding is that the runner by extrusion die enters skeleton inside by the hole that the outer surface of metallic framework passes skeleton, under the effect of the support of the core of skeleton inside and forming cavity, skeleton coated and form tube wall, the molten polymer that another extruder is extruded subsequently also be by at the runner of the extrusion die of tubular metallic framework cylindrical arranged around under the situation of not passing the tubular metallic framework, outer compound one layer of polymeric layer at established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping, two extruders and extrusion die are in the cylindrical arranged around of tubular metallic framework, wherein the molten polymer extruded of extruder is that runner by extrusion die enters skeleton inside by the hole that the outer surface of metallic framework passes skeleton, form the internal layer of steel-plastics composite pipe and form one deck clad (thinner) at the inner surface of metallic framework than internal layer at the outer surface of metallic framework, again at the outer compound one layer of polymeric layer of established tube wall, so both can solve compound the two interface of metal and polyethylene and be difficult for that secure bond is compound to be the technical barrier of one, also can save the polyethylene or the polypropylene material of polarity.
The production method of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, the shared die head of the extrusion die of at least two extruders, this die head has two runners, this die head stretches into tubular metallic framework cavity arrangements, wherein the outer runner of the molten polymer extruded of extruder by two runners of extrusion die routed up the skeleton outer surface by the hole that the inner surface of metallic framework passes skeleton, under the support of the core of skeleton inside and forming cavity effect, skeleton coated and form tube wall in the skeleton peripheral disposition, the internal layer runner of the molten polymer that another extruder is extruded subsequently by two runners of extrusion die is under the situation of not passing the tubular metallic framework, at the compound one layer of polymeric layer of the internal layer of established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping, the molten polymer that extrude at this center from the tubular metallic framework (being inner chamber) is routed up the skeleton outer surface by the hole that the inner surface of metallic framework passes skeleton, outer surface at metallic framework forms the outer of steel-plastics composite pipe and (thinner than skin at inner surface formation one deck clad of metallic framework,), again at the compound one layer of polymeric layer of the internal layer of established tube wall, can solve compound the two interface of metal and polyethylene equally and be difficult for that secure bond is compound to be the technical barrier of one, also can save the polyethylene or the polypropylene material of polarity.
The production method of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, at least wherein extrusion die of two extruders and runner are the cylindrical arranged around at the tubular metallic framework, another extruder extrusion die and runner are the cavity arrangements that stretches into the tubular metallic framework, the hole that passes cylindrical skeleton at the extrusion die of the cylindrical arranged around of tubular metallic framework and polymer that runner is extruded thereof coats skeleton, at the extrusion die of the cavity arrangements of tubular metallic framework and polymer that runner is extruded thereof under the situation of not passing the tubular metallic framework, at the compound one layer of polymeric layer of established tube wall internal layer; Or skeleton is coated at the hole that the extrusion die of the cavity arrangements of tubular metallic framework and polymer that runner is extruded thereof pass cylindrical skeleton, under the situation of not passing the tubular metallic framework, at the outer compound one layer of polymeric layer of established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping at the extrusion die of the cylindrical arranged around of cylindrical skeleton and polymer that runner is extruded thereof.
The production method of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, the extrusion die and the connected extruder of extrusion foaming insulation material around the cylindrical of tubular metallic framework, have also been arranged, by this die head and runner thereof at the compound again one deck foaming thermal-insulating of extruding of the outer wall of the multiple tube of finishing two layers of polymer thing layer, increase an extruder and extrusion die, make many one decks of steel-plastics composite pipe insulating foam layer, improved the heat-insulating property of steel-plastics composite pipe.
The production method of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, the extrusion die of tubular metallic framework cylindrical arranged around is a die head that is connected as a single entity, have two runners, the polymer that one of them runner is extruded is to coat skeleton, another runner extruded polymer subsequently forms compound skin on tube wall, have two runners in the die head, make device structure compacter.
The production method of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, extrude the polymer that coats skeleton and be can secure bond and the clad metal skeleton prevent the polymer that polar group arranged of section (interface) pressure fluid medium osmosis in going into, internal layer or outer compound polymeric layer at its tube wall are the nonpolar polymeric layers that makes things convenient for fusion to connect, this polymer that polar group is arranged be through graft modification have carboxyl or polyethylene hydroxyl or carbonyl polar group or that polarity is arranged (HDPE) or polypropylene (PP) or crosslinked with silicane (or crosslinkable) polyethylene (PEX) or a non-crosslinked heatproof polyethylene (PE-RT), non-polar polymer can adopt polyethylene.
The present invention has the process units of the steel-plastics composite pipe of two layers of polymer thing layer, comprise steel plate or steel wire unreeling structure, pertusate steel plate buckling moulding or screw winding shaping form the moulding welding mechanism or the broadwise steel wire winding steel radial of tubular metallic framework and use to weld the wheel pressure welding or hang weldering the crosspoint is welded and the welding fabrication mechanism of formation tubular metallic framework, coat the extrusion mechanism that skeleton polymer forms tube wall and form the composite bed polymer on tube wall, internal layer extruder and/or outer extruder, the cooling and shaping case, hauling machine, periphery and/or inner chamber at pertusate tubular metallic framework are provided with and can molten polymer be passed the extrusion molding mechanism that cylindrical skeleton coats skeleton the formation tube wall by extrusion die and runner thereof, be provided with by extrusion die and runner thereof molten polymer extrusion molding mechanism at the internal layer or the outer multiple tube polymeric layer of established tube wall under the situation of not passing the tubular metallic framework at tubular metallic framework periphery and/or inner chamber, extrusion molding mechanism can all be arranged on around the cylindrical of tubular metallic framework, the skeleton polymer clad and on the clad tube wall compound skin all can finish from the outside of tubular metallic framework; Equally also can by the extrusion die of the inner chamber setting of tubular metallic framework and runner is finished the skeleton polymer clad and on the clad tube wall compound internal layer polymer, extrusion molding mechanism contains extrusion die, runner, forming cavity, core.
The process units of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, internal layer and outer molding die at the multiple tube of the periphery setting of pertusate steel plate tubular metallic framework are to have the coextrusion die head of internal layer and outer layer copolymer runner or have the internal layer polymer runner respectively and two independent molding dies that are provided with of outer layer copolymer runner, the extrusion die runner of tubular metallic framework cylindrical arranged around can be a die head that is connected as a single entity, have two runners, the polymer that one of them runner is extruded is to coat skeleton, another runner extruded polymer subsequently forms compound skin on tube wall, have two runners in the die head, make device structure compacter, two independent molding dies that are provided with then make die head easier.
The process units of the above-mentioned steel-plastics composite pipe that two layers of polymer thing layer is arranged, stretching into, the interior coextrusion die head of steel wire tubular metallic framework of welding fabrication is the coextrusion die head with internal layer and outer layer copolymer runner.
The production method of the steel-plastics composite pipe that two layers of polymer thing layer arranged of the present invention and device solves metallic framework in the metallic skeleton reinforced composite plastic pipe and the interface affinity problem of polymer non-individual body, also can save the polyethylene or the polypropylene material of polarity, can produce the steel-plastics composite pipe that bearing capacity height, anti-corrosion capability are strong, have two kinds of performance plastic layer tube walls, the composite pipe pressure-bearing ability height of producing, plastic tube wall and metallic framework are firmly compound each other.
Description of drawings:
Fig. 1 is a process units schematic diagram of the present invention.
Fig. 2 is a process units horizontal layout schematic diagram of the present invention.
Fig. 3 is that extrusion die is arranged schematic diagram in apparatus of the present invention.
Fig. 4 is another layout schematic diagram of extrusion die in apparatus of the present invention.
Fig. 5 is that extrusion die one is arranged schematic diagram again in apparatus of the present invention.
Fig. 6 is the layout schematic diagram of extrusion die of the present invention and extruder.
Fig. 7 is the present invention's warp, broadwise steel wire draw drum and extrusion die position view.
Fig. 8 is an extrusion die of the present invention, decided at the higher level but not officially announced through the mould position view.
Fig. 9 is another schematic diagram of process units of the present invention.
The specific embodiment:
Embodiment 1:
Fig. 1-Fig. 3 has provided the embodiment of the invention 1 installation drawing.Referring to Fig. 1, Fig. 2, be provided with the unreeling machine 1, tubular hole pattern steel skeleton shaping mechanism 3, tubular hole pattern steel skeleton welding mechanism 4 of hole pattern steel band 2, the tubular hole pattern steel skeleton 5, the heater 6 of tubular hole pattern steel skeleton 5, the extruder 7 that coats hole pattern steel skeleton polymeric layer, the extrusion die 8 that coats hole pattern steel skeleton polymeric layer, outer extruder 9, outer extrusion die 10, composite pipe cooling sizing case 11, composite pipe spraying cooling water case 12, composite pipe hauling machine 13, cutting machine 14, heap pipe support 15 of welding fabrication by compound pipe molding technology precedence.
Referring to Fig. 1, Fig. 2, Fig. 3, the hole pattern steel band 2 of fenestrated 19 is a tubular hole pattern steel skeleton 5 through welding mechanism 4 welding fabrications, in Fig. 3, the fusion that the extruder 7 of coating hole pattern steel skeleton polymeric layer is extruded has runner and forming cavity 20 and the core 18 interior sizing effects of the polymer 21 of polar group by extrusion die 8, polymer 21 is passed the hole 19 of tubular metallic framework, skeleton is coated formation tube wall 16 (being the clad of skeleton 5), again by outer extruder 9, outer extrusion die 10 is extruded compound one deck common polythene outer tube 17 in the outside of tube wall 16, through the cooling sizing, traction, the polymer 16 of producing polar group after the cutting is combined with each other each other securely with the metallic framework surface, there is the hole pattern steel plate of one deck common polythene skin 17 to strengthen composite plastic pipe 22.
Embodiment 2:
Fig. 4 has provided extrusion die layout drawing in the embodiment of the invention 2 devices.Present embodiment 2 is basic same with embodiment 1.The internal layer runner 27 of the coextrusion die head 24 of the clad 25 that is to extrude compound skeleton 5 and the inner tube 26 of not existing together and skeleton clad runner 28 are the cavity arrangements that stretch into the tubular metallic framework, the hole that passes cylindrical skeleton at the extrusion die of the cavity arrangements of tubular metallic framework and the polymer that polar group is arranged that runner is extruded thereof coats skeleton and forms tube wall 25 (being the clad of skeleton 5), at the extrusion die of the cavity arrangements of tubular metallic framework and polymer non-individual body that runner is extruded thereof under the situation of not passing the tubular metallic framework, under forming cavity 30 actings in conjunction outside, the polyethylene that internal layer extruder 23 is extruded is compound again layer of polyethylene 26 on the internal layer of established tube wall 25, through the cooling sizing, traction, the polymer tube wall 25 of producing polar group after the cutting is combined with each other each other securely with the metallic framework surface, there is the hole pattern steel plate of one deck common polythene internal layer 26 to strengthen composite plastic pipe 29.
Embodiment 3:
Fig. 5 has provided extrusion die layout drawing in the embodiment of the invention 3 devices.Present embodiment 3 is basic same with embodiment 1.Do not exist together is to coat the hole 19 that the polymer that polar group is arranged 21 that the extruder 7 of hole pattern steel skeleton polymeric layer extrudes runner and the forming cavity by extrusion die 8 passes polymer 21 the tubular metallic framework, skeleton is coated formation tube wall 16 (being the clad of skeleton 5), and the polymer non-individual body that internal layer extruder 23 is extruded is by internal layer extrusion die 31 compound again one layer of polymeric 26 on the internal layer of established tube wall 16.In present embodiment 3, outer forming cavity 30 is to be contained in the cooling sizing case 11.
Embodiment 4:
Fig. 6 has provided extrusion die layout drawing in the embodiment of the invention 4 devices.Present embodiment 4 is basic same with embodiment 1.The do not exist together skeleton clad runner 28 of extrusion die 33 of the clad 25 that is to extrude compound skeleton 5 is the cavity arrangements that stretch into the tubular metallic framework, the hole that the polymer that polar group is arranged that extruder 32 is extruded passes cylindrical skeleton coats formation tube wall 25 (being the clad of skeleton 5) with skeleton, extrudes compound one deck common polythene outer tube 17 in the outside of tube wall 25 by outer extruder 9, outer extrusion die 10 again.
Embodiment 5:
Fig. 7, Fig. 8 have provided warp, broadwise steel wire draw drum and extrusion die, extrusion die and interior plug die layout drawing in the embodiment of the invention 5 devices.Present embodiment 5 is basic same with embodiment 3, not existing together is the molding mode difference of tubular steel skeleton, in present embodiment 3, warp-wise steel wire 39 is emitted from draw drum 34, broadwise steel wire 40 is emitted from draw drum 35, the crosspoints that weldering wheel 37 twines warp-wise steel wire warp with the broadwise steel wire in the shaping mechanism 36 tubular steel-wire carcass 38 that is welded.Coat hole that the polymer that polar group is arranged 21 that the extruder 7 of hole pattern steel skeleton polymeric layer extrudes runner and the forming cavity by extrusion die 8 pass polymer 21 the tubular metallic framework and skeleton is coated form tube wall 16 (being the clad of skeleton 38), the polymer that internal layer extruder 23 is extruded is by internal layer extrusion die 31 compound again one layer of polymeric 26 on the internal layer of established tube wall 16.
Embodiment 6:
Fig. 9 has provided the embodiment of the invention 6 figure.Present embodiment 6 is basic same with embodiment 3.Not existing together is the molding mode difference of tubular steel skeleton, in present embodiment 3, pertusate steel plate 2 is shaped to tubular metallic framework 43 through bonding machine 42 welding screw windings in screw winding make-up machine 41, the polymer that polar group is arranged 21 that the extruder 7 of coating hole pattern steel skeleton polymeric layer is extruded passes tubular metallic framework 43 by extrusion die 8 hole coats formation tube wall 16 (being the clad of skeleton 38) with skeleton, and the polymer non-individual body that internal layer extruder 23 is extruded is by internal layer extrusion die 31 compound again one layer of polymeric 26 on the internal layer of established tube wall 16.
The various embodiments described above are that foregoing of the present invention is further described, but this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to the foregoing description.All technology that realizes based on foregoing all belong to scope of the present invention.
Claims (10)
1, the production method that the steel-plastics composite pipe of two layers of polymer thing layer is arranged, comprise pertusate steel plate or steel band buckling moulding or screw winding moulding and be welded into the tubular metallic framework, or the broadwise steel wire twines the warp-wise steel wire through the cylindrical skeleton that is welded, it is characterized in that utilizing two extruders at least, wherein runner and forming cavity and the core of the molten polymer extruded of extruder by extrusion die passed hole tubular metallic framework, skeleton is coated the formation tube wall, the molten polymer that another extruder is extruded subsequently by extrusion die runner and forming cavity and core film under the situation of not passing the tubular metallic framework, at the internal layer or the outer compound one layer of polymeric layer of established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping.
2, the production method that the steel-plastics composite pipe of two layers of polymer thing layer is arranged as claimed in claim 1, the wherein runner of the extrusion die of an extruder that it is characterized in that at least two extruders is the cylindrical arranged around at the tubular metallic framework, this molten polymer of extruding is that the runner by extrusion die enters skeleton inside by the hole that the outer surface of metallic framework passes skeleton, under the effect of the support of the core of skeleton inside and forming cavity, skeleton coated and form tube wall, the molten polymer that another extruder is extruded subsequently also be by at the runner of the extrusion die of tubular metallic framework cylindrical arranged around under the situation of not passing the tubular metallic framework, at the outer compound one layer of polymeric layer of established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping.
3, the production method that the steel-plastics composite pipe of two layers of polymer thing layer is arranged as claimed in claim 1, the shared die head of extrusion die that it is characterized in that at least two extruders, this die head has two runners, this die head stretches into tubular metallic framework cavity arrangements, wherein the outer runner of the molten polymer extruded of extruder by two runners of extrusion die routed up the skeleton outer surface by the hole that the inner surface of metallic framework passes skeleton, under the support of the core of skeleton inside and forming cavity effect, skeleton coated and form tube wall in the skeleton peripheral disposition, the internal layer runner of the molten polymer that another extruder is extruded subsequently by two runners of extrusion die is under the situation of not passing the tubular metallic framework, at the compound one layer of polymeric layer of the internal layer of established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping.
4, the production method that the steel-plastics composite pipe of two layers of polymer thing layer is arranged as claimed in claim 1, it is characterized in that wherein extrusion die of two extruders at least and runner are the cylindrical arranged around at the tubular metallic framework, another extruder extrusion die and runner are the cavity arrangements that stretches into the tubular metallic framework, the hole that passes cylindrical skeleton at the extrusion die of the cylindrical arranged around of tubular metallic framework and polymer non-individual body that runner is extruded thereof coats skeleton, at the extrusion die of the cavity arrangements of tubular metallic framework and polymer non-individual body that runner is extruded thereof under the situation of not passing the tubular metallic framework, at the compound one layer of polymeric layer of established tube wall internal layer; Or skeleton is coated at the hole that the extrusion die of the cavity arrangements of tubular metallic framework and polymer non-individual body that runner is extruded thereof pass cylindrical skeleton, at the extrusion die of the cylindrical arranged around of cylindrical skeleton and polymer non-individual body that runner is extruded thereof under the situation of not passing the tubular metallic framework, at the outer compound one layer of polymeric layer of established tube wall, this tubing is produced the steel-plastics composite pipe that the hole tubular strengthens the two layers of polymer thing layer of body metallic framework through cooling and shaping.
5, as claim 1 or 2 or the 3 or 4 described production methods that the steel-plastics composite pipe of two layers of polymer thing layer is arranged, it is characterized in that also having arranged around the cylindrical at the tubular metallic framework extrusion die and connected extruder with the extrusion foaming insulation material, by this die head and runner thereof at the compound again one deck foaming thermal-insulating of extruding of the outer wall of the multiple tube of finishing two layers of polymer thing layer.
6, as right 1 or 2 or the 3 or 4 described production methods that the steel-plastics composite pipe of two layers of polymer thing layer is arranged, the extrusion die that it is characterized in that tubular metallic framework cylindrical arranged around is a die head that is connected as a single entity, have two runners, the polymer that one of them runner is extruded is to coat skeleton, and another runner extruded polymer subsequently forms compound skin on tube wall.
7, as claim 1 or 2 or the 3 or 4 described production methods that the steel-plastics composite pipe of two layers of polymer thing layer is arranged, it is characterized in that extruding the polymer that coats skeleton and be can secure bond and the clad metal skeleton prevent the polymer that polar group arranged of cross-section pressure fluid media (medium) in infiltrating through, be the nonpolar polymeric layer that makes things convenient for fusion to connect at the internal layer or the outer compound polymeric layer of its tube wall.
8, the process units that the steel-plastics composite pipe of two layers of polymer thing layer is arranged, comprise steel plate or steel wire unreeling structure, pertusate steel plate buckling moulding or screw winding shaping form the moulding welding mechanism or the broadwise steel wire winding steel radial of tubular metallic framework and use to weld the wheel pressure welding or hang weldering the crosspoint is welded and the welding fabrication mechanism of formation tubular metallic framework, coat the extrusion mechanism that skeleton polymer forms tube wall and form the composite bed polymer on tube wall, internal layer extruder and/or outer extruder, the cooling and shaping case, hauling machine, it is characterized in that being provided with and by extrusion die and runner thereof molten polymer to be passed cylindrical skeleton skeleton is coated the extrusion molding mechanism that forms tube wall, be provided with by extrusion die and runner thereof molten polymer extrusion molding mechanism at the internal layer or the outer multiple tube polymeric layer of established tube wall under the situation of not passing the tubular metallic framework at tubular metallic framework periphery and/or inner chamber at the periphery of pertusate tubular metallic framework and/or inner chamber.
9,, it is characterized in that internal layer and the outer molding die at the multiple tube of the periphery setting of pertusate steel plate tubular metallic framework is to have the coextrusion die head of internal layer and outer layer copolymer runner or have the internal layer polymer runner respectively and two independent molding dies that are provided with of outer layer copolymer runner as claims 8 described process units that the steel-plastics composite pipe of two layers of polymer thing layer is arranged.
10, as claims 8 described process units that the steel-plastics composite pipe of two layers of polymer thing layer is arranged, it is characterized in that stretching into, the interior coextrusion die head of steel wire tubular metallic framework of welding fabrication is the coextrusion die head with internal layer and outer layer copolymer runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2006100201720A CN101003173A (en) | 2006-01-19 | 2006-01-19 | Method and equipment for producing steel-plastics composite tube with two layers of polymer layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100201720A CN101003173A (en) | 2006-01-19 | 2006-01-19 | Method and equipment for producing steel-plastics composite tube with two layers of polymer layer |
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