CN110039741A - For manufacturing the screw plastic extrusion apparatus of Peroxide-crosslinked Pe Pipe - Google Patents
For manufacturing the screw plastic extrusion apparatus of Peroxide-crosslinked Pe Pipe Download PDFInfo
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- CN110039741A CN110039741A CN201910187898.0A CN201910187898A CN110039741A CN 110039741 A CN110039741 A CN 110039741A CN 201910187898 A CN201910187898 A CN 201910187898A CN 110039741 A CN110039741 A CN 110039741A
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- Prior art keywords
- pipe
- pexa
- rectifier
- extruder
- screw
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 238000001125 extrusion Methods 0.000 title claims abstract description 33
- 229920003023 plastic Polymers 0.000 title claims description 35
- 239000004033 plastic Substances 0.000 title claims description 35
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000007906 compression Methods 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000004484 Briquette Substances 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000000750 progressive effect Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000004132 cross linking Methods 0.000 abstract description 58
- 238000000034 method Methods 0.000 abstract description 21
- 239000003431 cross linking reagent Substances 0.000 abstract description 16
- 230000001360 synchronised effect Effects 0.000 abstract description 16
- 239000000843 powder Substances 0.000 abstract description 14
- 238000000465 moulding Methods 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- 235000008331 Pinus X rigitaeda Nutrition 0.000 abstract description 4
- 235000011613 Pinus brutia Nutrition 0.000 abstract description 4
- 241000018646 Pinus brutia Species 0.000 abstract description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract description 3
- 239000004703 cross-linked polyethylene Substances 0.000 abstract description 3
- 239000013590 bulk material Substances 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 15
- 238000001816 cooling Methods 0.000 description 12
- 210000001161 mammalian embryo Anatomy 0.000 description 12
- 239000000203 mixture Substances 0.000 description 11
- 229920001903 high density polyethylene Polymers 0.000 description 10
- 239000004700 high-density polyethylene Substances 0.000 description 10
- 238000004513 sizing Methods 0.000 description 10
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 9
- 238000009472 formulation Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000012969 di-tertiary-butyl peroxide Substances 0.000 description 7
- 230000004927 fusion Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 150000002978 peroxides Chemical class 0.000 description 5
- 229920001169 thermoplastic Polymers 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 229910000854 Po alloy Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 3
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- ODJQKYXPKWQWNK-UHFFFAOYSA-N 3,3'-Thiobispropanoic acid Chemical compound OC(=O)CCSCCC(O)=O ODJQKYXPKWQWNK-UHFFFAOYSA-N 0.000 description 1
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000003490 Thiodipropionic acid Substances 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000004717 peroxide crosslinked polyethylene Substances 0.000 description 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000019303 thiodipropionic acid Nutrition 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Abstract
The invention discloses a kind of for manufacturing the screw extrusion device of Peroxide-crosslinked Pe Pipe, using screw molding powder plastochondria high pressure extruder, right-angle handpiece, rectifier, and machine barrel, the oily circulation constant temperature system of screw rod and rectifier, manufacture for synchronous cross-linking and two step method crosslinking PEXa pipe, compared with traditional plunger-type extruder, the compression of material is carried out continuously with conveying, the close degree of pine of gained PEXa tube wall is uniform, it can be with high speed extrusion, compared with the manufacture of post-crosslinking PEXa pipe, crosslinking agent is applicable in than wide, worry without " incipient scorch ", gained finished product free from extraneous odour, sanitation performance is good, also it can be used for the manufacture of thermoplasticity crosslinked polyethylene (TPEX) pipe, and the manufacture of two-layer structure resistance oxygen TPEX pipe, it is managed with any specification PEXa, the high speed of TPEX pipe manufactures.
Description
Technical field
The invention belongs to plastics machinery technical field, in particular to a kind of spiral shell for Peroxide-crosslinked Pe Pipe
Rod-type extrusion device.
Background technique
The manufacture of synchronous cross-linking peroxide crosslinked polyethylene (PEXa) pipe, it is raw materials used finely to be blended for various ingredients
Polyvinyl resin bulk material and corresponding additive mixture, using plunger-type extruder, the materials such as resin bulk material are through compressing
Conveying forms plug flow, forms through fusion plastification and be completed at the same time cross-linking reaction.In this course, complete with cross-linking process
At the viscosity of polyethylene steeply rises, and not only needs very big extrusion pressure, and crosslinked pipe embryo can only be parallel to
The overall movement in direction is squeezed out, plunger-type extruder extrusion pressure is big, and only assigns material and squeeze out the single of direction to be parallel to
Thrust, therefore can satisfy this requirement.Worry of the synchronous cross-linking method of this peroxide without " incipient scorch (crosslinking too early) ",
Therefore it is lower that half-life decomposition temperature can be used, but free from extraneous odour, the good DTBP(di-tert-butyl peroxide of sanitation performance) etc.
Crosslinking agent, can be adapted for different tube diameters, different wall thickness PEXa pipe manufacture, dimensional accuracy is high, and low energy consumption, and operation is easy
Deng.But it is restricted by crosslinking agent decomposition rate, so that cross-linking process is completed, only to can provide crosslinking agent abundant for very long head
Resolving time, therefore extrusion pressure needs are very big, speed of production is extremely slow.And the reciprocating motion of the pistons of plunger-type extruder, material
Impulsive compressional and conveying, the close degree of tube wall pine have a cyclically-varying, and there is also have periodically variable internal stress in tube wall.
Common screw formula extruder cannot be used for synchronous cross-linking legal system and make PEXa pipe, this is because common screw formula extruder
It is parallel to the thrust for squeezing out direction and rotational component caused by screw rod rotation while acting on PEXa pipe embryo, causes to lose heat
The PEXa pipe embryo of plasticity blends into clast.And the compression ratio of common screw, generally 4 or so, extrusion pressure is small, powerless push is lost
Go thermoplastic PEXa pipe proembryo into.
Chinese patent literature CN102139538A is disclosed to prepare Peroxide-crosslinked Pe Pipe using post-crosslinking method
Method, i.e., using screw-type extruder post-crosslinking PEXa pipe manufacturing method, speed of production can quickly, and material is squeezing out
Fusion plastification is shaped to crosslinkable PEXa pipe embryo in the process, is then crosslinked.It theoretically requires, material is squeezing out melting modeling
Change formative stage, does not allow crosslinking agent to decompose, that is to say, that cross-linking PEXa pipe embryo is not allowed to crosslink reaction.
The manufacture of this post-crosslinking PEXa pipe, the compression and conveying of material are continuously that tube wall bulk density is uniform.And
In order to guarantee that peroxide cross-linking agent prematurely decomposes in extrusion process, polyethylene is prematurely crosslinked (incipient scorch), it is necessary to use
High-temperature peroxide crosslinking agent.It is introduced according to crosslinking agent handbook (Japanese Chinese translation), DYBP 2,5- dimethyl, 2,5-(tert-butyls,
Peroxy)-hexin -3 ] it is that crosslinking agent uniquely can be used in HDPE, but DYBP peculiar smell is serious, sanitation performance is poor.Guaranteeing HDPE melting
During being plasticized and being molding, it is also necessary to guarantee the decomposition of DYBP prematurely, best melt temperature is 166 DEG C to 169 DEG C, temperature
Control window is extremely narrow, and operation difficulty is very big, even if in this way, it is also not possible to accomplish that DYBP is absolutely not decomposed, because of the beginning of DYBP
Decomposition temperature is 147 DEG C, and " incipient scorch (crosslinking too early) " occurs in extrusion process and is inevitable, this is to the steady of product quality
Qualitative is a kind of serious hidden danger, thus extruder continuous operation for a period of time after, it is necessary to stop cleaning screw rod, machine barrel and head
Deng, waste of time, the energy, worker operation large labor intensity, rejection rate height etc..And manufacture larger caliber PEXa tubing there is not yet
Report.
Summary of the invention
The purpose of the present invention is to provide a kind of close degree of tube wall pine is uniform, sanitation performance is good, the worry without " incipient scorch ", can be with
Manufacturing device suitable for different size PEXa pipe manufacture and the fast PEXa pipe of speed of production.In order to achieve the above objectives, of the invention
The technical solution taken is as follows.
A kind of screw molding powder plastochondria high pressure extrusion device, including self-cleaning type feed hopper, Screw type plastic extruder, machine
The rectifier of cylinder outlet setting, the right-angle handpiece connecting with the rectifier, and oily circulation constant temperature system, the oil circulation are permanent
Warm system is equipped with heating and refrigeration part, is equipped with corresponding subsidiary engine, realizes that the close degree of tube wall pine is uniform, sanitation performance is good, without " burnt
The worry of burning " can be adapted for the manufacture of different size PEXa pipe manufacture and the fast PEXa pipe of speed of production.
Further, the self-cleaning type feed hopper is installed with an agitating paddle in cylinder-shaped or conical hopper, and agitating paddle has
Hopper barrel function is cleaned, center " pipeline " holding " funnel " in hopper is flowed.
Further, the screw rod be tapered single screw rod, screw diameter from large to small, screw channel from depth to shallow, compression ratio 100 with
On.
Further, the extruder barrel outlet is equipped with rectifier, and the rectifier design is " honeycomb briquette " shape, is inside equipped with
Be to be parallel to the rib of its axis between multiple hole, described hole, the powder material being compressed by when it passes through rectifier,
Entrained rotational component is absorbed by the hole wall rib of honeycomb coaly rectifier completely in powder material, is being parallel to extrusion side
To thrust under, head is entered with the bulk material plug flow without rotational component, starts fusion plastification molding crosslinking, and push away
The dynamic PEXa pipe embryo extrusion neck ring mold formed.
Further, the right-angle handpiece, head plug can be embedded in heating element and temperature sensor.
Further, the right-angle handpiece, head plug can pass through gas, such as nitrogen.
Further, teflon coatings are sprayed with the machine head port mould and mandrel surface of plastic contacts in the right-angle handpiece.
Further, the screw rod, machine barrel and rectifier outer wall connect oily circulation constant temperature system, have oil heating and oil cooling
Function, crosslinking agent does not decompose in an extruder, and circulation oil temperature is depending on the lowest decomposition temperature of crosslinking agent used, to DTBP
Speech, recycle oil not higher than 126 DEG C to be advisable.
Above-mentioned extrusion device further includes the corresponding subsidiary engine of extruding pipe material, the subsidiary engine include tubing sizing, cooling, traction,
Collect and control device, post-crosslinking with crosslinking furnace, two-layer structure hinder oxygen TPEX pipe manufacture used in " plastic pipe coat head and
Plastic pipe coating unit containing plastic pipe coating head " (referring to 9481006 B2 of US).
Above-mentioned extrusion device can be used for producing different size synchronous cross-linking PEXa pipe, post-crosslinking PEXa pipe, two step method crosslinking
PEXa pipe, TPEX pipe and coextrusion resistance oxygen TPEX pipe.The synchronous cross-linking PEXa pipe, the conveying of material is to be carried out continuously with compression
, can high speed extrusion, the worry of no incipient scorch, tube wall bulk density is uniform.Peroxide cross-linking agent in the post-crosslinking PEXa pipe is
DTBP(di-tert-butyl peroxide) or BIBP(dual-tert-butyl dicumyl peroxide).The two step method crosslinking PEXa pipe,
Its pipe is completed tentatively to be crosslinked in cross-head, continues to be crosslinked after extrusion neck ring mold, and crosslinking distance is long, and peroxide is handed over
Join agent and obtains sufficiently high temperature, enough heats and sufficient time.TPEX pipe, composition include: HDPE 20~
It 40Phr, PERT 60~80Phr, BiBP 0.20~0.40Phr, 1076 0.25phr, DLTDP 0.15phr and other helps
Agent.The coextrusion hinders oxygen PEX tubing, oxidation prevention layer is done using EVOH/PO alloy barrier material, using " the plastics of the present inventor
Tubing coating head and the plastic pipe coating unit that head is coated containing plastic pipe " is made (referring to 9481006 B2 of US).
The EVOH/PO alloy, i.e. ethylene vinyl alcohol copolymer resin/polyolefin alloy.
Beneficial effects of the present invention:
1, using apparatus of the present invention, the conveying and compression of material are carried out continuously, gained PEXa tubing, TPEX tubing, two layers
Structure hinders oxygen TPEX tubing etc., and wall thickness bulk density is uniform, and the internal stress of aperiodicity variation, pipe performance is squeezed better than plunger type
The PEXa tubing of machine manufacture out.
2, the use of rectifier can effectively eliminate rotational component present in screw-type extruder extruded material, to protect
Screw-type extruder manufacture synchronous cross-linking (worry of no incipient scorch) PEXa pipe has been demonstrate,proved to be possibly realized.
3, the extrusion of bulk material, can with strict control temperature of charge, material in extruding/transmission process, resin do not melt,
Crosslinking agent does not decompose, to ensure that low decomposition temperature crosslinking agent that can be good using free from extraneous odour, sanitation performance.
4, it is managed using apparatus of the present invention production two step method crosslinking PEXa, using first crosslinking (synchronous cross-linking) plus post-crosslinking, machine
Head can shorten, and squeezing out resistance reduces, and crosslinking distance lengthens, and crosslinking agent obtains the sufficient resolving time, therefore height may be implemented
Speed squeezes out.
5, it is managed using apparatus of the present invention production two step method crosslinking PEXa, using first crosslinking (synchronous cross-linking) plus post-crosslinking, pipe
Inside and outside is the atmosphere of inert gases of heat, and without fire hazard in production process, pipe inner and outer surfaces also avoid thermo-oxidative ageing.
6, it is managed using apparatus of the present invention production two step method crosslinking PEXa, any heavy caliber PEXa pipe can be manufactured.
Technical solution of the present invention is described in detail in the following with reference to the drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of extrusion device of the present invention；
Fig. 2 is the rectifier sectional schematic diagram of extrusion device of the present invention；
Fig. 3 is the handpiece structure schematic diagram of extrusion device of the present invention.
Specific embodiment
Fig. 1 is the structural schematic diagram of extrusion device of the present invention.In figure, 1, oil circulating pump；2, oil return pipe；3, send oil pipe；4,
Thrust bearing；5, screw rod；6, outlet of extruder connecting flange；7, extruder barrel；8, feed hopper；9, blender；10, blender
Motor；11, rectifier connecting flange；12, rectifier barrel；13, rectifier rib.
Fig. 2 is the rectifier sectional schematic diagram of extrusion device of the present invention.In figure, 13, rib；12, rectifier barrel.
Fig. 3 is the handpiece structure schematic diagram of extrusion device of the present invention, in figure, 101, and plug electric heater connecting terminal；102,
Head connecting flange；103, plug venthole；104, heater；105, mouth mold adjustment bolt；106, handpiece body；107, plug；
108, mouth mold；109, mouth mold pressure ring；110, plug spanner hole.
Embodiment 1
Manufacture tube wall bulk density is uniform, the synchronous cross-linking PEXa pipe of the worry of no incipient scorch
Bulk material high pressure extruder, rectifier, right-angle handpiece, oily circulation constant temperature system are installed, with conventionally used thermoplasticity
The linking of the subsidiary engines such as sizing, cooling, traction, cutting, the collection device of plastic tube product line, connects water, electricity and gas, and formation one is complete
Whole plastic tube product line.The oil temperature of oil circulating system is set as 120 DEG C, make the machine barrel of powder high pressure extruder, screw rod and
Rectifier barrel temperature is stablized at 120 DEG C or so.Head and plug temperature are set as between 240 DEG C to 250 DEG C, are matched using following
Side's (parts by weight):
200~250 microns of HDPE(partial size) 100
DYBP 0.15~0.25
TAlC(Triallyl isocyanurate) 0.25~0.17
1076(β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid octadecanol ester antioxidant) 0.2~0.35
DLTDP(thiodipropionic acid bis-dodecanol ester antioxidant) 0.2~0.15
Other auxiliary agents are appropriate
Material is weighed by formulation ratio, is put into the hopper 8 of screw bulk material high pressure extruder after blending, and starting bulk material is high
Press extruder, it is rectified after material be squeezed under powerful thrust head start fusion plastification molding be cross-linked into PEXa
Pipe embryo, and extrusion neck ring mold continuously is moved in parallel along tubing axis, under the traction of dragger, into cooling sizing dress
It sets, completes the manufacture of PEXa pipe.
By this technological operation, the gained PEXa pipe degree of cross linking can up to the PEXa pipe line speed of 85% or so, dn20x2
It is but the material using 2 times to 5 times of plunger-type extruder synchronous cross-linking PEXa pipe line speed up to 4 ms/min to 8 ms/min
It is continuous compression and conveying, tube wall bulk density is uniform；Because using synchronous cross-linking technique, allow HDPE melting, plasticizing,
It is molding to be completed at the same time cross-linking process, the worry of no incipient scorch, better than the post-crosslinking process using screw-type extruder.
Embodiment 2
The uniform free from extraneous odour of tube wall bulk density is manufactured to manage without the worry synchronous cross-linking PEXa of incipient scorch
Bulk material high pressure extruder, rectifier, right-angle handpiece, oily circulation constant temperature system are installed, with conventionally used thermoplasticity
The linking of the subsidiary engines such as sizing, cooling, traction, cutting, the collection device of plastic tube product line, connects water, electricity and gas, and formation one is complete
Whole plastic tube product line.The oil temperature of oil circulating system is set as 120 DEG C, make the machine barrel of powder high pressure extruder, screw rod and
Rectifier barrel temperature is stablized at 120 DEG C or so.Head and plug temperature are set as between 230 DEG C to 240 DEG C, are matched using following
Side's (parts by weight):
200~250 microns of HDPE(partial size) 100
DTBP 0.40~0.50
1076 0.30~0.40
DLTDP 0.10~0.15
Other auxiliary agents are appropriate
Material is weighed by formulation ratio, is put into the hopper 8 of screw bulk material high pressure extruder after blending, and starting bulk material is high
Press extruder, it is rectified after material be squeezed under powerful thrust head start fusion plastification molding be cross-linked into PEXa
Pipe embryo, and extrusion neck ring mold continuously is moved in parallel along tubing axis, under the traction of dragger, into cooling sizing dress
It sets, completes the manufacture of PEXa pipe.
By this technological operation, the gained PEXa pipe degree of cross linking is up to 88% or so, because having used sanitation performance to meet FDA regulation
DTBP crosslinking agent, tube wall bulk density is uniform, and tubing free from extraneous odour, sanitation performance is good, the PEXa of the dn20x2 of the worry of no incipient scorch pipe
Line speed is 2 times to 5 times of synchronous cross-linking PEXa pipe speed of production up to 4 ms/min to 8 ms/min.
Embodiment 3
Manufacture worry of the uniform free from extraneous odour of tube wall bulk density without incipient scorch, big small-bore high speed extrusion two step method crosslinking PEXa pipe, by powder
Plastochondria high pressure extruder, rectifier, right-angle handpiece, oil circulating system install, with crosslinking furnace and conventionally used thermoplastic
The linking of the subsidiary engines such as sizing, cooling, traction, cutting, the collection device of pipe production line, connects water, electricity and gas, forms one completely
Plastic tube product line.The oil temperature of oil circulating system is set as 110 DEG C, makes the machine barrel, screw rod and rectification of powder high pressure extruder
Device barrel temperature is stablized at 110 DEG C or so.Head and plug temperature are set as between 210 DEG C to 230 DEG C, and nitrogen is passed through in plug
Gas is crosslinked temperature in furnace and is set as 250 DEG C, using following formulas (parts by weight):
200~250 microns of HDPE(partial size) 100
DTBP 0.40~0.50
1076 0.30~0.40
DLTDP 0.10~0.15
Other auxiliary agents are appropriate
Material is weighed by formulation ratio, is put into the hopper 8 of screw bulk material high pressure extruder after blending, and starting bulk material is high
Press extruder, it is rectified after material be squeezed under powerful thrust head start fusion plastification molding be tentatively cross-linked into
PEXa pipe embryo, and continuously extrusion neck ring mold constantly is not moved in parallel along tubing axis, under the traction of dragger, by being crosslinked furnace
After completing final crosslinking, passing through cooling diameter-setting equipment, the manufacture of PEXa pipe is completed.
By this technological operation, for the gained PEXa pipe degree of cross linking up to 88% or so, tube wall bulk density is uniform, tubing free from extraneous odour,
Sanitation performance is good, and the PEXa pipe line speed of dn20x2 is up to 14 ms/min to 30 ms/min.It is produced higher than post-crosslinking PEXa pipe
Linear velocity is 10 times to 15 times of synchronous cross-linking PEXa pipe speed of production.Pipe inside and outside wall oxidation induction period is close, in production process
Without fire hazard, tubing specification dn10~dn500, even more greatly, the head of head length comparable synchronization cross-linking method shorten.
Embodiment 4
Manufacture thermoplasticity crosslinked polyethylene (TPEX) pipe
Bulk material high pressure extruder, rectifier, right-angle handpiece, oily circulation constant temperature system are installed, with conventionally used thermoplasticity
The linking of the subsidiary engines such as sizing, cooling, traction, cutting, the collection device of plastic tube product line, connects water, electricity and gas, and formation one is complete
Whole plastic tube product line.The oil temperature of oil circulating system is set as 120 DEG C, make the machine barrel of powder high pressure extruder, screw rod and
Rectifier barrel temperature is stablized at 120 DEG C or so.Head and plug temperature are set as between 240 DEG C to 260 DEG C, are matched using following
Side's (parts by weight):
HDPE 20~40,
PERT (heat-proof polythene) 60~80,
BIBP 0.20~0.40,
1076 0.25,
DLTDP 0.15,
Other auxiliary agents are appropriate.
Material is weighed by formulation ratio, is put into the hopper 8 of screw bulk material high pressure extruder after blending, and powder is started
Body high pressure extruder, it is rectified after material be squeezed under powerful thrust head start fusion plastification molding be cross-linked into
TPEX pipe embryo, and extrusion neck ring mold continuously is moved in parallel along tubing axis, under the traction of dragger, pass through cooling sizing
After device, the manufacture of TPEX pipe is completed.
By this technological operation, the gained TPEX pipe degree of cross linking is can be controlled within 3%, tubing free from extraneous odour, heat resistance and compacted
Denaturation can be better than PERT II, close with PEXa, but with thermoplasticity, and tubing can be with hot melting recycling with sweat soldering, waste product.
The TPEX pipe line speed of dn20x2 is up to 15 ms/min to 40 ms/min.
Embodiment 5
Manufacture two-layer structure resistance oxygen TPEX pipe
Bulk material high pressure extruder, rectifier, right-angle handpiece, oily circulation constant temperature system are installed, head outlet end installs " modeling additional
Expects pipe material coats head and the plastic pipe coating unit containing plastic pipe coating head " (referring to 9481006 B2 of US), with
The linking of the subsidiary engines such as sizing, cooling, traction, cutting, the collection device of conventionally used thermoplastic plastic pipe production line, connects water power
Gas forms a complete thermoplastic plastic pipe production line.The oil temperature of oil circulating system is set as 120 DEG C, makes powder high pressure
Machine barrel, screw rod and the rectifier barrel temperature of extruder are stablized at 120 DEG C or so.Head and plug temperature are set as 240 DEG C extremely
It between 250 DEG C, is formulated using embodiment 4, material is weighed by formulation ratio, and screw powder high pressure extruder is put into after blending
In hopper 8, start powder high pressure extruder, it is rectified after material be squeezed into head under powerful thrust, start to melt
Melt plasticizing forming and is cross-linked into TPEX pipe embryo.Oxidation prevention layer does oxidation prevention layer using EVOH/PO alloy gold barrier material, using " plastic tube
Material coating head and the plastic pipe coating unit that head is coated containing plastic pipe " is made (referring to 9481006 B2 of US).
Plastic pipe coats head and the plastic pipe coating unit containing plastic pipe coating head, host temperature of each section
Be set as 140 DEG C, 170 DEG C, 210 DEG C, 210 DEG C, material is weighed by formulation ratio, put into after blending plastic pipe coating head and
In the hopper of the host of plastic pipe coating unit containing plastic pipe coating head, starting plastic pipe coats head and contains
There is the plastic pipe coating unit host of plastic pipe coating head, die extrusion is two-layer structure resistance oxygen TPEX pipe embryo, warp
The processes such as sizing, cooling, obtain two-layer structure resistance oxygen TPEX pipe, and oxygen transit dose is less than the 0.32g/m2 of DlN4726 specified value
d。
Comparative example 1
Using plunger-type extruder and corresponding subsidiary engine, managed by following formulas (parts by weight) production synchronous cross-linking PEXa,
200~250 microns of HDPE(partial size) 100
DTBP 0.45
1076 0.40
Material is weighed by formulation ratio, is put into the hopper of plunger-type extruder after blending, extruder temperature of each section is set as 50
DEG C~80 DEG C, 170 DEG C~180 DEG C, 240 DEG C~260 DEG C, by this technological operation, 1.1 meters of tubing dn20x1.9 line speed/
Divide to 1.5 ms/min, the degree of cross linking 88% or so, plunger-type extruder pulsed causes tube wall Song Micheng to material compression and conveying
Degree is obvious uneven.
Comparative example 2
Using screw-type extruder, add ir-crosslinkable furnace and corresponding subsidiary engine, produces post-crosslinking PEXa by following formulas (parts by weight)
Pipe,
200~250 microns of rice of HDPE(partial size) 100
DYBP 0.42
1076 0.40
Material is weighed by formulation ratio, is put into the hopper of parallel double-screw extruder after blending, melt temperature is strict controlled in
166 DEG C~169 DEG C, by this technological operation, 14 ms/min to 16 ms/min of tubing dn20x2.0 line speed, the degree of cross linking 80%
More than.Tubing has peculiar smell, and sanitation performance is poor, and specification is less than dn50, and the pipe inside and outside wall degree of cross linking is crosslinked significantly lower than tube wall middle layer
Degree.
Using a kind of screw molding powder plastochondria high pressure extruder and Peroxide-crosslinked Pe Pipe high speed manufacture dress
It sets, mating corresponding subsidiary engine, also can be used for being extruded into for the tubing of highly viscous PTFE, UHMWPE etc., bar, plate and profile shapes
The extrusion molding of type and ordinary thermoplastics' tubing.
Technical solution of the present invention is described in detail in above-described embodiment.It is apparent that the present invention is not limited being retouched
The embodiment stated.Based on the embodiments of the present invention, those skilled in the art can also make a variety of variations accordingly, but appoint
What is equal with the present invention or similar variation shall fall within the protection scope of the present invention.
Claims (9)
1. a kind of for manufacturing the screw plastic extrusion apparatus of Peroxide-crosslinked Pe Pipe, which is characterized in that including
Self-cleaning type feed hopper, Screw type plastic extruder, the rectifier of extruder barrel outlet setting are connect straight with the rectifier
Angle head, and oily circulation constant temperature system.
2. the apparatus according to claim 1, which is characterized in that the self-cleaning type feed hopper includes cylinder-shaped or cone material
The agitating paddle installed in bucket.
3. the apparatus according to claim 1, which is characterized in that the screw rod of the extruder is diameter progressive screw, compression ratio 100
More than.
4. the apparatus according to claim 1, which is characterized in that the rectifier has " honeycomb briquette " structure.
5. the apparatus according to claim 1, which is characterized in that the plug insertion heating element and temperature of the right-angle handpiece
Sensor.
6. the apparatus according to claim 1, which is characterized in that the plug of the right-angle handpiece can pass through gas.
7. the apparatus according to claim 1, which is characterized in that in the right-angle handpiece with the machine head port mould of plastic contacts and
Mandrel surface sprays teflon coatings.
8. the apparatus according to claim 1, which is characterized in that screw rod, machine barrel and the rectifier of the extruder are all connected with
Oily circulation constant temperature system.
9. device according to claim 4, which is characterized in that be equipped in " honeycomb briquette " structure of the rectifier porous
It is the hole wall rib for being parallel to its axis between hole, described hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910187898.0A CN110039741A (en) | 2019-03-13 | 2019-03-13 | For manufacturing the screw plastic extrusion apparatus of Peroxide-crosslinked Pe Pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910187898.0A CN110039741A (en) | 2019-03-13 | 2019-03-13 | For manufacturing the screw plastic extrusion apparatus of Peroxide-crosslinked Pe Pipe |
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| CN110039741A true CN110039741A (en) | 2019-07-23 |
Family
ID=67274837
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910187898.0A Pending CN110039741A (en) | 2019-03-13 | 2019-03-13 | For manufacturing the screw plastic extrusion apparatus of Peroxide-crosslinked Pe Pipe |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1751864A (en) * | 2004-09-24 | 2006-03-29 | 李始烈 | Device for forming crosslinked polythene pipe |
| CN103171117A (en) * | 2013-04-18 | 2013-06-26 | 北京化工大学 | Extrusion device of single-screw continuous extruded activated carbon filtering element |
| CN109161081A (en) * | 2018-08-20 | 2019-01-08 | 浙江梅勒派克斯阿管路***有限公司 | A kind of method that two step method prepares Peroxide-crosslinked Pe Pipe |
| CN209937615U (en) * | 2019-03-13 | 2020-01-14 | 浙江曼瑞德舒适***有限公司 | Screw type plastic extrusion device for manufacturing peroxide crosslinked polyethylene pipe |
-
2019
- 2019-03-13 CN CN201910187898.0A patent/CN110039741A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1751864A (en) * | 2004-09-24 | 2006-03-29 | 李始烈 | Device for forming crosslinked polythene pipe |
| CN103171117A (en) * | 2013-04-18 | 2013-06-26 | 北京化工大学 | Extrusion device of single-screw continuous extruded activated carbon filtering element |
| CN109161081A (en) * | 2018-08-20 | 2019-01-08 | 浙江梅勒派克斯阿管路***有限公司 | A kind of method that two step method prepares Peroxide-crosslinked Pe Pipe |
| CN209937615U (en) * | 2019-03-13 | 2020-01-14 | 浙江曼瑞德舒适***有限公司 | Screw type plastic extrusion device for manufacturing peroxide crosslinked polyethylene pipe |
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