CN103448228B - The technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten - Google Patents
The technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten Download PDFInfo
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- CN103448228B CN103448228B CN201310358084.1A CN201310358084A CN103448228B CN 103448228 B CN103448228 B CN 103448228B CN 201310358084 A CN201310358084 A CN 201310358084A CN 103448228 B CN103448228 B CN 103448228B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/39—Plasticisers, homogenisers or feeders comprising two or more stages a first extruder feeding the melt into an intermediate location of a second extruder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
- B29C48/916—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92428—Calibration, after-treatment, or cooling zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
- B29C2948/92619—Diameter or circumference
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92933—Conveying, transporting or storage of articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten, it is characterized in that, comprise the steps: that the material of (1) solid powder adds in screw extrusion device by hopper; (2) barrel entering screw extrusion device heats, and simultaneously through screw rod preliminary consolidation, material becomes semi-molten state; (3) material enters head, further compacting; (4) material enters the mouth mould cavity forming of screw extrusion device is tubulose, fixed inside and outside footpath under the effect of vacuum cooled shaping cover, and tentatively cools; (5) microporous pipe is obtained through cutting means cut-out.Present invention process carries out continuous profiled when being and making polymeric powder be in semi-molten state, is realizing microporous pipe quantity-produced simultaneously, and obtained product again without the need to through post processing, thus substantially increases production efficiency.Present invention process, owing to not using solvent, is of value to the health of environmental protection and operating personnel.
Description
Technical field
The present invention relates to a kind of moulding process of high molecule micropore material, particularly relate to the moulding process of macromolecular micropore pipe.
Background technology
The molding mode of poromerics has both at home and abroad at present: polymer beads sintering process, thermally induced phase separation, particles of inorganic material completion method and melt extruded pulling method etc.Wherein polymer beads sintering process is loaded in corresponding mould by the particle of certain particle diameter, and obtain the method for poromerics through high temperature sintering, be a kind of noncontinuity production method, production efficiency is low; Thermally induced phase separation is at high temperature dissolved in by polymer in specific solvent, form homogeneous phase solution, when the temperature decreases, homogeneous system generation Solid-Liquid Separation, the space that after desolvation, it occupies in system just defines micropore, this method needs a large amount of solvents when producing, and be harmful to, and this method is confined to prepare the little micropore filter material of thickness to environment and operating personnel; Particles of inorganic material completion method take particles of inorganic material as pore-foaming agent, shaping with mixed with polymers aft-loaded airfoil, after goods depanning, utilize extractant that inorganic matter is extracted from goods, the space that particles of inorganic material stays in system has just become hole, the product of the party's legal system need through extraction process, complex process; Melt extruded pulling method is after being extruded by melt polymer material, does not completely carry out rolling before hardening by cooling stretching and forming the method for micropore at it, and the method is generally used for the production of microperforated sheet.In addition, the macromolecule resin tubular body of common extrusion way is closed pore product.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, provide a kind of can consecutive production, the high environmental protection again of production efficiency extruding prepare the technique of microporous pipe.
For achieving the above object, the technical solution used in the present invention is: the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten, is characterized in that, comprise the steps:
(1) material of solid powder adds in screw extrusion device by hopper;
(2) barrel that described material enters described screw extrusion device heats, and simultaneously through the screw rod preliminary consolidation of screw extrusion device, described material becomes semi-molten state;
(3) described material enters the head of described screw extrusion device, the further compacting of the compression through described head;
(4) described material enters the mouth mould cavity forming of described screw extrusion device is tubulose, fixed inside and outside footpath under the effect of vacuum cooled shaping cover, and tentatively cools;
(5) microporous pipe is obtained through cutting means cut-out.
Preferably, described screw extrusion device comprises main and auxiliaries, and the barrel of subsidiary engine arranges perpendicular to the barrel of main frame and is communicated with the barrel of main frame, in described step (1)-(2), the material of solid powder is divided into two parts, portion directly enters main frame barrel, and just melt state in surface after heating, another part is introduced into subsidiary engine barrel, in surperficial significantly molten condition after heating, enter main frame barrel subsequently, and with the mixing of materials in main frame barrel, present uniform semi-molten state after mixing.
Preferably, described main and auxiliaries is connected with independently control system separately, for adjusting corresponding temperature and screw speed.
Preferably, the compression ratio of described head is 0.9-1.5.
Preferably, described screw rod is provided with cooled screw device.
Preferably, the vacuum of described vacuum cooled shaping cover is-0.05Mpa--0.1Mpa.
Preferably, after step (4), before step (5), described material cools further through water cooling plant under hauling machine effect.
Preferably, described material, after water cooling plant cools further, before cutting, continues under hauling machine effect dry through air cooling equipment.
Preferably, in described step (5), cutting means is that activity cuts car, and activity cuts car and carries out obtaining described microporous pipe with cutting to the tubular materials under hauling machine draw.
Preferably, in described step (2), the heating temperature range of barrel is 130 DEG C-190 DEG C.
Preferably, the temperature of described head is 160 DEG C-220 DEG C.
The invention solves the defect existed in background technology, there is following beneficial effect:
1. carry out continuous profiled when present invention process is and makes polymeric powder be in semi-molten state, realizing microporous pipe quantity-produced simultaneously, obtained product again without the need to through post processing, thus substantially increases production efficiency.Present invention process, owing to not using solvent, is of value to the health of environmental protection and operating personnel.
2. adopt two screw-type extruders that orthogonal formula is arranged, because in main frame, the temperature of material is lower, just state is melted in surface, and the temperature of material is slightly high in subsidiary engine, present surface significantly molten condition, therefore the mixing of materials of two kinds of different molten conditions evenly after, material in subsidiary engine because of melt surface part more, the material of melting non-in main frame surface bonding can being got up, guaranteeing that material is by presenting uniform semi-molten state during head, improve microporous pipe quality further.Two extruders can adopt independently control system respectively, so that adjust separately, strengthens flexibility.
3. on the basis of traditional extrusion device structure, control the compression ratio of head, can not only ensure that material is compacted in head, weaken the melting shear effect of extrusion device, thus reach surface bonding but do not melt into the suitable half melting state of, be beneficial to continuously extruding and molding, and can cost be saved.
4. screw rod is arranged cooled screw device, can the screw rod cutting heat be cut in a large number lower the temperature to producing in work in real time, thus avoid cutting and cut melting, the plasticizing that heat causes material, guarantee temperature and the state of material.
5. adopt vacuum cooled shaping cover to shape to material, the Wall thickness uniformity of shaping pipe is good.After preliminary cooling, adopt the mode of water-cooled further to lower the temperature to material, environmental protection, low cost and fast, effectively, adopt air-cooled mode to carry out drying to material further, by the moisture blowout in micropore, can obtain dry product.
6. activity cuts car and coordinates with hauling machine, realizing with cutting, obtaining the product that length is consistent, section is neat to tubular materials.
7. control head, the temperature of vacuum cooled shaping cover and hauling speed, goods can be made progressively to cool, obtain that micropore size is consistent, intensity good, the microporous pipe of any surface finish.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the process chart of the preferred embodiments of the present invention;
In figure: 2, head, 4, mouth mould, 6, vacuum cooled shaping cover, 8, main frame barrel, 12, main-machine screw, 14, motor, 16, reductor, 18, hopper, 22, subsidiary engine barrel, 24, main frame heating collar, 26, subsidiary engine heating collar, 28, cooled screw device, 32, spray pipe, 34, the intensive carrying roller of water-cooled, 36, water receiving tank, 38, air-cooled intensive carrying roller, 42, upper air cooling blowpipe, 44, lower air cooling blowpipe, 46, upper supporting roller, 48, snub pulley, 52, compression cylinder, 54, body, 56, fixed length locating part, 58, cut positioning cylinder, 62, cut saw blade.
Detailed description of the invention
The present invention is further detailed explanation in conjunction with the accompanying drawings and embodiments now, and these accompanying drawings are the schematic diagram of simplification.
As shown in Figure 1, the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten, comprises the steps:
(1) material of solid powder adds in screw extrusion device by hopper;
(2) barrel that material enters screw extrusion device heats, and simultaneously through the screw rod preliminary consolidation of screw extrusion device, material becomes semi-molten state;
(3) material enters the head 2 of screw extrusion device, the further compacting of the compression through head 2;
(4) material enters mouth mould 4 cavity forming of screw extrusion device is tubulose, fixed inside and outside footpath under the effect of vacuum cooled shaping cover 6, and tentatively cools, and leaves screw extrusion device afterwards;
(5) microporous pipe is obtained through cutting means cut-out.
Further, screw extrusion device comprises main and auxiliaries, and main frame comprises the main frame barrel 8 of level, and with the main-machine screw 12 be located in main frame barrel 8.Main frame barrel 8 is stretched out in one end of main-machine screw 12.One end of main frame barrel 8 is provided with the motor 14 driving main-machine screw 12 to rotate, and is also provided with reductor 16 between motor 14 and main-machine screw 12, and the other end is coaxially provided with the head 2 and cylindric mouth mould 4 that diameter of section diminishes gradually successively.Main frame barrel 8 is also provided with hopper 18.Subsidiary engine then comprises subsidiary engine barrel 22, subsidiary engine screw rod, motor, reductor and hopper accordingly, the same main frame of the annexation between each structure member, but overall vertically the setting with subsidiary engine barrel 22 axis of subsidiary engine is as the criterion.The lower end of subsidiary engine barrel 22 is communicated with main frame barrel 8, particular by Flange joint.In step (1)-(2), the material of solid powder is divided into two parts, and portion directly enters main frame barrel 8, and another part is introduced into subsidiary engine barrel 22, subsequently by subsidiary engine screw rod promote be transported in main frame, again under the effect of main-machine screw 12 with mixing of materials in main frame barrel 8.Wherein, the compression ratio of main-machine screw 12 and subsidiary engine screw rod is respectively 1.0-2.0.The outer cover of main frame barrel 8 is provided with corresponding main frame heating collar 24, the outside of subsidiary engine barrel 22 is then arranged with corresponding subsidiary engine heating collar 26, heat material in barrel with this, the heating temperature range of main frame heating collar 24 and subsidiary engine heating collar 26 is 130 DEG C-190 DEG C.But the heating-up temperature of main frame barrel 8 is lower than the heating-up temperature of subsidiary engine barrel 22, therefore just state is melted in surface after directly entering the heating material of main frame, it is then surface significantly molten condition after entering the heating material of subsidiary engine, after two serving material fully mix in main frame barrel 8, in subsidiary engine material because of melt surface part more, the material of the non-melting in main frame surface bonding can be got up, thus obtain uniform semi-molten state.
Main and auxiliaries is connected with independently control system (not shown) separately, thus is convenient to the temperature and the main-machine screw rotating speed that adjust separately main frame, and the temperature of subsidiary engine and subsidiary engine screw speed.
Further, the compression ratio of head 2 controls for 0.9-1.5, to ensure that material is compacted in head 2, surface bonding, but does not melt into one.
Further, main-machine screw 12 and subsidiary engine screw rod are respectively equipped with cooled screw device 28, cooling water is adopted to cool screw rod, make in rotation work produce cut in a large number cut heat screw rod lowered the temperature in time, avoid Yin Qie to cut melting, plasticizing that heat causes material, guarantee temperature and the state of material, also can extend screw rod service life.Concrete, the cooled screw device 28 of main frame is located at one end that main-machine screw 12 stretches out main frame barrel 8, and the cooled screw device of subsidiary engine is located at one end that subsidiary engine screw rod stretches out subsidiary engine barrel 22, and main control system screw rod 12 and subsidiary engine extruder temperature are all at 50 DEG C-150 DEG C.
Further, the vacuum of vacuum cooled shaping cover 6 is-0.05Mpa--0.1Mpa, realizes the sizing to material and preliminary cooling.From screw extrusion device tubing out, can being cooled further by the mode naturally cooled, also can carry out pressure cooling by adding water cooling plant.When adding water cooling plant, water cooling plant comprises the spray pipe 32 be located at above tubing, with the intensive carrying roller 34 of the water-cooled be located at below tubing and water receiving tank 36, spray pipe 32, the intensive carrying roller 34 of water-cooled and water receiving tank 36 are arranged in vertical direction correspondence, the intensive carrying roller 34 of water-cooled carries tubing, and spray pipe 32 pairs of tubing entirety carry out spraying cooling, and water receiving tank 36 then plays the effect of catchmenting.Because product is microcellular structure, cooling water can enter into micropore, if therefore arrange air cooling equipment in water cooling plant downstream, then can obtain dry product fast.Air cooling equipment specifically comprises the air-cooled intensive carrying roller 38 being arranged on tubing lower end carrying tubing, and point is located at the upper air cooling blowpipe 42 of tubing upper and lower and lower air cooling blowpipe 44.With comprehensive raising product drying degree.
Further, after material leaves screw extrusion device, under hauling machine effect, carry out water-cooled, air-cooled and cut successively.Hauling machine is arranged on cutting means upstream, comprise the upper supporting roller 46 and snub pulley 48 that set up tubing upper and lower separately, upper supporting roller 46 is driven by drive unit and rotates, and compresses tubing by compression cylinder 52 from top simultaneously, and drive the snub pulley 48 of tubing lower end to rotate, thus realize the traction to tubing.A upper supporting roller 46, snub pulley 48 and and the compression cylinder 52 of correspondence be one group, preferably arrange two groups.For avoiding, because traction causes microporous pipe protrusion of surface, uneven phenomenon, frequency conversion type hauling machine can being adopted, ensureing the stable of hauling speed, simultaneously by the adjustment to hauling speed and extruded velocity, can obtain among a small circle, the microporous pipe of different porosities.Such as main control system screw rod 12 rotating speed 5 revs/min-40 revs/min, hauling speed 5 ms/h-30 ms/h, can obtain the microporous pipe of porosity 20%-40%.
Further, cutting means activity of selecting cuts car, and activity cuts car and can realize with cutting the tubular materials under hauling machine draw, thus obtains the microporous pipe that length is consistent, section is neat.Concrete, activity cuts the wheel that car comprises tabular body 54 and is located at body 54 lower end, one end, downstream of body 54 is provided with the fixed length locating part 56 raised up, one end, upstream of body 54 is provided with successively and cuts positioning cylinder 58 and cut saw blade 62, and fixed length locating part 56 can be tabular, sheet, bulk or shaft-like.Cut saw blade 62 to move under in the vertical direction.The axis cutting positioning cylinder 58 is vertically arranged.During work, the cropped positioning cylinder 58 of upstream extremity of pipe material product compresses location, downstream is against activity and cuts on the fixed length locating part 56 of car, and tubing continues to vacillate dynamic downwards under hauling machine effect, and activity cuts car and obtains microporous pipe with dynamic cutting tubing simultaneously.
Controlling head 2 temperature is 160 DEG C-220 DEG C, and the temperature of vacuum cooled shaping cover 6 is 80 DEG C-130 DEG C, and hauling speed 5 ms/h-30 ms/h, and goods can be made progressively to cool, and obtains that micropore size is consistent, intensity good, the microporous pipe of any surface finish.
Above according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, related personnel in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on description, must determine technical scope according to right.
Claims (9)
1. a technique for the continuously extruded preparation microporous pipe of polymeric powder semi-molten, is characterized in that, comprise the steps:
(1) material of solid powder adds in screw extrusion device by hopper;
(2) barrel that described material enters described screw extrusion device heats, and simultaneously through the screw rod preliminary consolidation of screw extrusion device, described material becomes semi-molten state;
(3) described material enters the head of described screw extrusion device, the further compacting of the compression through described head;
(4) described material enters the mouth mould cavity forming of described screw extrusion device is tubulose, fixed inside and outside footpath under the effect of vacuum cooled shaping cover, and tentatively cools;
(5) microporous pipe is obtained through cutting means cut-out;
Described screw extrusion device comprises main and auxiliaries, the barrel of subsidiary engine arranges perpendicular to the barrel of main frame and is communicated with the barrel of main frame, in described step (1)-(2), the material of solid powder is divided into two parts, and portion directly enters main frame barrel, just state is melted in surface after heating, another part is introduced into subsidiary engine barrel, in surperficial significantly molten condition after heating, enters main frame barrel subsequently, and with the mixing of materials in main frame barrel, present uniform semi-molten state after mixing; Described main and auxiliaries is connected with independently control system separately, for adjusting corresponding temperature and screw speed.
2. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 1, is characterized in that: the compression ratio of described head is 0.9-1.5.
3. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 1, is characterized in that: described screw rod is provided with cooled screw device.
4. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 1, is characterized in that: the vacuum of described vacuum cooled shaping cover is-0.05Mpa--0.1Mpa.
5. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 1, it is characterized in that: after step (4), before step (5), described material cools further through water cooling plant under hauling machine effect.
6. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 5, is characterized in that: described material, after water cooling plant cools further, before cutting, continues under hauling machine effect dry through air cooling equipment.
7. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 1, it is characterized in that: in described step (5), cutting means is that activity cuts car, and activity cuts car and carries out obtaining described microporous pipe with cutting to the tubular materials under hauling machine draw.
8. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 1, is characterized in that: in described step (2), the heating temperature range of barrel is 130 DEG C-190 DEG C.
9. the technique of the continuously extruded preparation microporous pipe of a kind of polymeric powder semi-molten according to claim 1, is characterized in that: the temperature of described head is 160 DEG C-220 DEG C.
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| CN108367477A (en) * | 2016-11-29 | 2018-08-03 | 吕林霖 | Infiltrating irrigation pipe automatic moulding production line and moulding process |
| CN108752106B (en) * | 2018-07-17 | 2023-11-07 | 华南农业大学 | Device and process for preparing carbon-based fertilizer particles by utilizing nutrient crystal fusion infiltration |
| CN109177105B (en) * | 2018-07-19 | 2021-01-05 | 宿迁绿金人橡塑机械有限公司 | Method for continuously and rapidly preparing rubber-plastic blended microporous infiltrating irrigation pipe by multistage extruder |
| CN111204031A (en) * | 2020-03-13 | 2020-05-29 | 赵金山 | Plastic granules dissolves shaping tubulation equipment |
| CN111841444A (en) * | 2020-07-21 | 2020-10-30 | 杭州仁和热熔胶有限公司 | Hot melt adhesive melting extrusion granulation device and process thereof |
| CN112895374B (en) * | 2021-02-07 | 2023-04-25 | 云南长宜科技有限公司 | Preparation method and device of airflow unit |
| CN113386316A (en) * | 2021-06-11 | 2021-09-14 | 河北工业大学 | Method for preparing multi-cavity tube based on hot stretching technology |
| CN113858571A (en) * | 2021-10-08 | 2021-12-31 | 广东顺塑塑料实业有限公司 | Novel high-efficient plastify pipe extrusion line |
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