CN105946194B - A kind of fluorine plastic-steel pipe production method - Google Patents

A kind of fluorine plastic-steel pipe production method Download PDF

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Publication number
CN105946194B
CN105946194B CN201610576492.8A CN201610576492A CN105946194B CN 105946194 B CN105946194 B CN 105946194B CN 201610576492 A CN201610576492 A CN 201610576492A CN 105946194 B CN105946194 B CN 105946194B
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Prior art keywords
steel pipe
product
production method
fluorine plastic
mould
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CN201610576492.8A
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Chinese (zh)
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CN105946194A (en
Inventor
杨明
朱云峰
李军
余正勇
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Quzhou Bai Qiang new Mstar Technology Ltd
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Quzhou Bai Qiang New Mstar Technology Ltd
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Classifications

    • 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
    • B29C48/91—Heating, e.g. for cross linking
    • B29C48/9105—Heating, e.g. for cross linking of hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • 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
    • 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
    • B29C2948/92514—Pressure
    • 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
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/92857—Extrusion unit
    • 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
    • B29C2948/92923—Calibration, after-treatment or cooling zone
    • 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 fluorine plastic-steel pipe production method, this method is to first pass through centrifuge to rotate the centrifugation of fluoroplastics powder, is removed the impurity in fluoroplastics powder by centrifugal force；Plastics processing is carried out to A product again, A product is entered plasticizing flow regime and then is squeezed into fluoroplastics in mould by high pressure extruder and continuously extrusion molding is in outer surface of steel tube, by fluoroplastics and the shaping of steel pipe integral type continuous extrusion；Finally it is placed in after solidifying channel heating through going de-stress to handle, obtains finished product.The present invention can not only avoid the generation of stomata, improve connective stability, improve isolation effect, extend steel pipe service life, also with the advantages of material cost is relatively low, finished product thermal resistance is small, finished product good effect of heat exchange and production efficiency is high.

Description

A kind of fluorine plastic-steel pipe production method
Technical field
The present invention relates to a kind of fluorine plastic-steel pipe production method.
Background technology
In order to prevent steel pipe to be corroded, damage in use environment, a plastics or painting are covered typically now outside steel pipe Material isolates steel tube surface with external environment.Wherein the steel pipe of plastic covering is processed typically by the method for die casting or socket , i.e., in one plastic tube of outer surface of steel tube die casting, or a plastic pipe sleeve is connected on outer surface of steel tube, so as to form plastics Steel pipe.But this kind of production method easily produces stomata in production, not only results in the connective stability of plastic tube and steel pipe Poor, plastic tube is easier to separate with steel pipe, and has an effect on isolation effect of the plastic tube to steel tube surface, causes the use of steel pipe Life-span is shorter.In addition, the plastic sheath thickness on the plastic steel pipe that this kind of production method is produced is larger, not only material cost compared with Height, and for when being used as heat exchanger tube, thermal resistance to be larger, and heat transfer effect is poor.Therefore, existing plastic steel pipe production method is present Be also easy to produce stomata, plastic tube and steel pipe connective stability it is poor, isolation effect is poor, the service life of steel pipe is shorter, material Expect the problem of cost is higher, finished product thermal resistance is larger and the heat transfer effect of finished product is poor.
The content of the invention
It is an object of the present invention to provide a kind of fluorine plastic-steel pipe production method.The present invention can not only avoid the production of stomata It is raw, the connective stability of plastic tube and steel pipe is improved, improves isolation effect, extends steel pipe service life, also with material cost Relatively low, finished product thermal resistance is small and the advantages of good effect of heat exchange.
Technical scheme：A kind of fluorine plastic-steel pipe production method, comprises the following steps：
A, impurity elimination is centrifuged, rotates the centrifugation of fluoroplastics powder using centrifuge, by centrifugal force by fluoroplastics powder Impurity removes, and obtains A product；
B, plastics processing is carried out to A product, A product is entered plasticizing flow regime, obtain B product；
C, B product are squeezed into mould by high pressure extruder, make B product continuously extrusion molding outside the steel pipe at the uniform velocity moved axially Surface, B product and steel pipe integral type continuous extrusion are molded, obtain C product；
D, (it is heating and curing), then is removed into a heating passage after C product being passed through into solidifying channel heating Stress processing, obtains finished product.
In a kind of foregoing fluorine plastic-steel pipe production method, the integral type continuous extrusion in the step c is shaped to, by steel pipe Be placed in mould, make to form die cavity between mould and outer surface of steel tube, finally by B product squeeze into die cavity with steel pipe integral type extrusion molding Shaping, while steel pipe at the uniform velocity moves in mould, make B product continuously extrusion molding in outer surface of steel tube.
In a kind of foregoing fluorine plastic-steel pipe production method, the high pressure extruder in the step c applies 20MPa's to B product Extruding force, and squeezed into after B product are heated into 65 DEG C in mould；The axial movement speed of the steel pipe is 0.7 m/min.
In a kind of foregoing fluorine plastic-steel pipe production method, the bore of the steel pipe is 10mm~60mm, and steel pipe thickness is 0.5mm~6mm, the thickness of die cavity is 0.3mm~3mm；The fluoroplastics powder is PTFE powders.
In a kind of foregoing fluorine plastic-steel pipe production method, the step b is that first A product are pre-processed, then A product are entered Row plastics processing, A product is entered plasticizing flow regime, obtain B product.
In a kind of foregoing fluorine plastic-steel pipe production method, the pretreatment is that it is A quality 1% that quality is added in A product ~3% aviation kerosine, stood at normal temperatures after stirring and stack 11h~12h.
In a kind of foregoing fluorine plastic-steel pipe production method, the plastics processing in the step b is to add quality in A product For the solvent naphtha of A quality 25%, it is subsequently placed in 50 DEG C of sealed thermostat case 12 hours.
In a kind of foregoing fluorine plastic-steel pipe production method, solidifying channel includes 4 segment length being sequentially connected in the step d It is 3 meters of passage, the heating-up temperature of 4 sections of passages is followed successively by 100 DEG C, 200 DEG C, 300 DEG C and 400 DEG C；C product are in solidifying channel Translational speed be 0.7 m/min.
In a kind of foregoing fluorine plastic-steel pipe production method, gone in the step d de-stress processing be, with 0.7 m/min of speed Degree, which is passed through in cooling duct, to be cooled down；Cooling duct include be sequentially connected 300 DEG C of cooling section, 100 DEG C of air cooling section and The water cooling section of normal temperature, cooling segment length are 3 meters, and air cooling segment length is 7 meters, and water cooling segment length is 2 meters.
Compared with prior art, present invention improves over plastic steel pipe production method, a kind of fluorine Plastic Steel Pipe producer is devised Method, by centrifuging the impurity in impurity elimination removal fluoroplastics powder, mobility of the fluoroplastics in extrusion molding is improved, avoids the production of stomata It is raw；By plastics processing, fluoroplastics is entered plasticizing flow regime, then by high pressure extruder and mould make fluoroplastics with The steel pipe that at the uniform velocity moves in steel tube surface extrusion moulding, and fluoroplastics and steel pipe integral type extrusion moulding, avoid fluorine modeling pipe from existing Stomata is produced during extrusion molding, not only increases the connective stability of fluorine modeling pipe and steel pipe, moreover it is possible to improves isolation effect, extending steel pipe makes With the life-span, additionally it is possible to the less fluorine modeling pipe of thickness is extruded on the less steel pipe of bore, forms small-diameter, thin-walled fluorine Plastic Steel Pipe, Material cost is reduced, the thermal resistance of finished product is reduced and improves the heat transfer effect of finished product.In addition, the present invention by pre-process into One step improves the mobility of fluoroplastics powder, enters a generation for preventing stomata；Improved by the shaping of integral type continuous extrusion Production efficiency；By curing process and go de-stress to handle, complete fixed line and eliminate the stress in fluorine Plastic Steel Pipe, further improve Connective stability, extends steel pipe service life.Therefore, the present invention can not only avoid the generation of stomata, and it is steady to improve connection It is qualitative, isolation effect is improved, extends steel pipe service life, also with material cost is relatively low, finished product thermal resistance is small, finished product heat transfer effect The advantages of good and production efficiency is high.
Embodiment
With reference to embodiment, the present invention is further illustrated, but is not intended as the foundation limited the present invention.
Embodiment one.A kind of fluorine plastic-steel pipe production method, comprises the following steps：
A, impurity elimination is centrifuged, rotates the centrifugation of fluoroplastics powder using centrifuge, by centrifugal force by fluoroplastics powder Impurity removes, and obtains A product；
B, plastics processing is carried out to A product, A product is entered plasticizing flow regime, obtain B product；
C, B product are squeezed into mould by high pressure extruder, make B product continuously extrusion molding outside the steel pipe at the uniform velocity moved axially Surface, B product and steel pipe integral type continuous extrusion are molded, obtain C product；
D, after C product being passed through into solidifying channel heating, then stress processing is removed, obtains finished product.
Integral type continuous extrusion in the step c is shaped to, and steel pipe is placed in mould, makes mould and outer surface of steel tube Between form die cavity, finally B product are squeezed into steel pipe integral type extrusion moulding in die cavity, while steel pipe at the uniform velocity moves in mould It is dynamic, make B product continuously extrusion molding in outer surface of steel tube.Plastics processing in the step b is that it is A qualities that quality is added in A product The solvent naphtha of amount 25%, is subsequently placed in 50 DEG C of sealed thermostat case 12 hours.
Embodiment two.A kind of fluorine plastic-steel pipe production method, comprises the following steps：
A, impurity elimination is centrifuged, rotates the centrifugation of fluoroplastics powder using centrifuge, by centrifugal force by fluoroplastics powder Impurity removes, and obtains A product；
B, first A product are pre-processed, then plastics processing is carried out to A product, A product is entered plasticizing flow regime, obtain B product； The pretreatment is that the aviation kerosine that quality is A quality 1%~3% is added in A product, quiet at normal temperatures after stirring Put and stack 11h~12h；
C, B product are squeezed into mould by high pressure extruder, make B product continuously extrusion molding outside the steel pipe at the uniform velocity moved axially Surface, B product and steel pipe integral type continuous extrusion are molded, obtain C product；
D, after C product being passed through into solidifying channel heating, then stress processing is removed, obtains finished product.
Integral type continuous extrusion in the step c is shaped to, and steel pipe is placed in mould, makes mould and outer surface of steel tube Between form die cavity, finally B product are squeezed into steel pipe integral type extrusion moulding in die cavity, while steel pipe at the uniform velocity moves in mould It is dynamic, make B product continuously extrusion molding in outer surface of steel tube.High pressure extruder in the step c applies 20MPa extruding force to B product, And squeezed into after B product are heated into 65 DEG C in mould；The axial movement speed of the steel pipe is 0.7 m/min.The bore of the steel pipe For 10mm~60mm, steel pipe thickness is 0.5mm~6mm, and the thickness of die cavity is 0.3mm~3mm；The fluoroplastics powder is PTFE Powder.Plastics processing in the step b is that the solvent naphtha that quality is A quality 25% is added in A product, is subsequently placed in 50 DEG C sealed thermostat case in 12 hours.
Solidifying channel includes the passage that 4 segment length that are sequentially connected are 3 meters, the heating temperature of 4 sections of passages in the step d Degree is followed successively by 100 DEG C, 200 DEG C, 300 DEG C and 400 DEG C, and C product are progressively heated into 400 DEG C by 4 sections of passages；C product are logical in solidification Translational speed in road is 0.7 m/min.It is that it is logical to be passed through cooling with 0.7 m/min of speed that de-stress processing is gone in the step d Cooled down in road；Cooling duct includes the water cooling section for 300 DEG C of cooling section, 100 DEG C of air cooling section and the normal temperature being sequentially connected, It is 3 meters to cool down segment length, and air cooling segment length is 7 meters, and water cooling segment length is 2 meters, and by cooling duct, C product are progressively from 400 DEG C of drops To normal temperature.

Claims (7)

1. a kind of fluorine plastic-steel pipe production method, it is characterised in that comprise the following steps：
A, impurity elimination is centrifuged, rotates the centrifugation of fluoroplastics powder using centrifuge, by centrifugal force by the impurity in fluoroplastics powder Remove, obtain A product；
B, first A product are pre-processed, then plastics processing is carried out to A product, A product is entered plasticizing flow regime, obtain B product；
C, B product are squeezed into mould by high pressure extruder, make B product continuously extrusion molding in the steel pipe surface at the uniform velocity moved axially Face, B product and steel pipe integral type continuous extrusion are molded, obtain C product；
D, after C product being passed through into solidifying channel heating, then stress processing is removed, obtains finished product；
The pretreatment is the aviation kerosine that quality is A quality 1%~3% to be added in A product, in normal temperature after stirring Lower stand stacks 11h~12h.
A kind of 2. fluorine plastic-steel pipe production method according to claim 1, it is characterised in that：Integral type in the step c Continuous extrusion is shaped to, and steel pipe is placed in mould, is made to form die cavity between mould and outer surface of steel tube, is finally squeezed into B product With steel pipe integral type extrusion moulding in die cavity, while steel pipe at the uniform velocity moves in mould, make B product continuously extrusion molding in steel pipe surface Face.
A kind of 3. fluorine plastic-steel pipe production method according to claim 2, it is characterised in that：High extrusion in the step c Go out machine and B product are applied with 20MPa extruding force, and squeezed into after B product are heated into 65 DEG C in mould；The axial movement speed of the steel pipe Spend for 0.7 m/min.
A kind of 4. fluorine plastic-steel pipe production method according to claim 2, it is characterised in that：The bore of the steel pipe is 10mm ~60mm, steel pipe thickness are 0.5mm~6mm, and the thickness of die cavity is 0.3mm~3mm；The fluoroplastics powder is PTFE powders.
A kind of 5. fluorine plastic-steel pipe production method according to claim 1, it is characterised in that：At plasticizing in the step b Manage and be, the solvent naphtha that quality is A quality 25% is added in A product, is subsequently placed in 50 DEG C of sealed thermostat case 12 hours.
A kind of 6. fluorine plastic-steel pipe production method according to any claim in claim 1 to 5, it is characterised in that：Institute The passage that 4 segment length that solidifying channel includes being sequentially connected in step d are 3 meters is stated, the heating-up temperature of 4 sections of passages is followed successively by 100 DEG C, 200 DEG C, 300 DEG C and 400 DEG C；Translational speed of the C product in solidifying channel is 0.7 m/min.
A kind of 7. fluorine plastic-steel pipe production method according to any claim in claim 1 to 5, it is characterised in that：Institute It is to be passed through in cooling duct and cooled down with 0.7 m/min of speed to state and de-stress processing is gone in step d；Cooling duct include according to The water cooling section of 300 DEG C of cooling section of secondary connection, 100 DEG C of air cooling section and normal temperature, cooling segment length are 3 meters, air cooling segment length For 7 meters, water cooling segment length is 2 meters.
CN201610576492.8A 2016-07-20 2016-07-20 A kind of fluorine plastic-steel pipe production method Active CN105946194B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101058658A (en) * 2006-10-27 2007-10-24 朱汪力 Black polytetrafluoroethene line and preparation technique
CN202674576U (en) * 2012-06-08 2013-01-16 谢雁 Production line for steel-plastic complex pipe with outer coating layer
CN103213270A (en) * 2013-04-09 2013-07-24 天津市天塑科技集团有限公司技术中心 Automatic production method of polytetrafluoroethylene (PTFE) dispersion resin
CN103921078A (en) * 2014-05-07 2014-07-16 张家港市维达纺织机械有限公司 Continuous production device of plastic coated stainless steel pipeline
CN103950170A (en) * 2014-05-07 2014-07-30 张家港市维达纺织机械有限公司 Continuous production device of three-layer plastic-coated metal pipes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101058658A (en) * 2006-10-27 2007-10-24 朱汪力 Black polytetrafluoroethene line and preparation technique
CN202674576U (en) * 2012-06-08 2013-01-16 谢雁 Production line for steel-plastic complex pipe with outer coating layer
CN103213270A (en) * 2013-04-09 2013-07-24 天津市天塑科技集团有限公司技术中心 Automatic production method of polytetrafluoroethylene (PTFE) dispersion resin
CN103921078A (en) * 2014-05-07 2014-07-16 张家港市维达纺织机械有限公司 Continuous production device of plastic coated stainless steel pipeline
CN103950170A (en) * 2014-05-07 2014-07-30 张家港市维达纺织机械有限公司 Continuous production device of three-layer plastic-coated metal pipes

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