CN105946194A - Method for producing fluoroplastic steel pipe - Google Patents
Method for producing fluoroplastic steel pipe Download PDFInfo
- Publication number
- CN105946194A CN105946194A CN201610576492.8A CN201610576492A CN105946194A CN 105946194 A CN105946194 A CN 105946194A CN 201610576492 A CN201610576492 A CN 201610576492A CN 105946194 A CN105946194 A CN 105946194A
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- China
- Prior art keywords
- product
- steel pipe
- production method
- fluorine plastic
- mould
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B29C48/91—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a method for producing a fluoroplastic steel pipe. The method includes the steps that fluoroplastic powder is made to do centrifugal rotation through a centrifugal machine at first, and impurities in the fluoroplastic powder are removed through centrifugal force; then, a product A is subject to plasticizing treatment, so that the product A enters in a plasticizing flow state; afterwards, fluoroplastic is extruded into a mold through a high-pressure extruder and is continuously subject to extrusion molding on the outer surface of the steel pipe, and the fluoroplastic and the steel pipe achieve continuous and integrated extrusion molding; at last, the corresponding product is placed in a curing channel to be heated and then subject to stress relief treatment, and accordingly a finished product can be obtained. By the adoption of the method, air holes can be avoided, connective stability is improved, the isolation effect is also improved, and the service life of the steel pipe is prolonged. Furthermore, the method has the advantages that material cost is low, thermal resistance of the finished product is small, the heat transfer effect of the finished product is good, and production efficiency is high.
Description
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 in using environment, damage, typically now it is cladded with at steel pipe
Cover plastics or coating steel tube surface to be isolated with external environment.The wherein steel pipe of plastic covering
Typically by die casting or socket method process, i.e. at one plastics of outer surface of steel tube die casting
Pipe, or a plastic pipe sleeve is connected on outer surface of steel tube, thus form plastic steel pipe.But,
This kind of production method easily produces pore when producing, and not only results in the company of plastic tube and steel pipe
Connecing less stable, plastic tube is easier to separate with steel pipe, but also affects plastic tube to steel pipe table
The isolation effect in face, the service life causing steel pipe is shorter.Additionally, this kind of production method produces
Plastic sheath thickness on plastic steel pipe out is relatively big, and not only material cost is higher, and is used for
During as heat exchanger tube, thermal resistance is relatively big, and heat transfer effect is poor.Therefore, existing plastic steel pipe is raw
Product method also exist be easily generated pore, plastic tube and steel pipe connective stability is poor, isolation effect
Service life the most poor, steel pipe is shorter, material cost is higher, the thermal resistance of finished product relatively greatly with become
The problem that the heat transfer effect of product is poor.
Summary of the invention
It is an object of the invention to, it is provided that a kind of fluorine Plastic Steel Pipe production method.The present invention can not only
Enough avoid the generation of pore, improve the connective stability of plastic tube and steel pipe, improve isolation effect,
Extend steel pipe service life, also have that material cost is relatively low, finished product thermal resistance is little and good effect of heat exchange
Advantage.
Technical scheme: a kind of fluorine Plastic Steel Pipe production method, comprises the following steps:
A, centrifugal roguing, use centrifuge to make the centrifugal rotation of fluoroplastics powder, pass through centrifugal force
By the Impurity removal in fluoroplastics powder, obtain A product；
B, A product are carried out plastics processing, make A product enter plasticizing flow regime, obtain B product；
C, by high pressure extruder, B product are clamp-oned in mould, make B product extrusion molding continuously even
The outer surface of steel tube that speed moves axially, by B product and steel pipe integral type continuous extrusion molding, obtains C
Product；
D, C product are passed through solidifying channel heating after (i.e. enter one to add the passage of heat and heat
Solidification), then it is removed stress process, obtain finished product.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, the integral type in described step c is squeezed continuously
Molded is to be placed in mould by steel pipe, makes to be formed between mould and outer surface of steel tube die cavity,
Finally B product are clamp-oned in die cavity with steel pipe integral type extrusion moulding, steel pipe is even in mould simultaneously
Speed is mobile, makes B product extrusion molding continuously at outer surface of steel tube.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, the high pressure extruder pair in described step c
B product apply the extruding force of 20MPa, and clamp-on in mould after B product are heated to 65 DEG C；Described
The speed that moves axially of steel pipe is 0.7 m/min.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, the bore of described steel pipe be 10mm～
60mm, steel pipe thickness is 0.5mm～6mm, and the thickness of die cavity is 0.3mm～3mm；Described fluorine
Plastic powder is PTFE powder.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, described step b is, first carries out A product
Pretreatment, then A product are carried out plastics processing, make A product enter plasticizing flow regime, obtain B
Product.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, described pretreatment is, adds in A product
Quality is the aerial kerosene of A quality 1%～3%, stands heap after stirring at normal temperatures
Put 11h～12h.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, the plastics processing in described step b is,
Adding the solvent naphtha that quality is A quality 25% in A product, the sealing being subsequently placed in 50 DEG C is permanent
In incubator 12 hours.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, in described step d, solidifying channel includes depending on
4 segment length of secondary connection are the passage of 3 meters, and 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 translational speed in solidifying channel is 0.7
M/min.
In aforesaid a kind of fluorine Plastic Steel Pipe production method, described step d go de-stress to process
For, cool down in being passed through cooling duct with the speed of 0.7 m/min；Cooling duct includes depending on
The cooling section of 300 DEG C of secondary connection, the air cooling section of 100 DEG C and the water-cooled section of room temperature, cooling section
A length of 3 meters, air cooling segment length is 7 meters, and water-cooled segment length is 2 meters.
Compared with prior art, present invention improves over plastic steel pipe production method, devise one
Fluorine Plastic Steel Pipe production method, removes the impurity in fluoroplastics powder by centrifugal roguing, improves fluorine
The plastics mobility when extrusion molding, it is to avoid the generation of pore；By plastics processing, make fluoroplastics
Enter plasticizing flow regime, then make fluoroplastics along with at the uniform velocity by high pressure extruder and mould
The steel pipe of movement is at steel tube surface extrusion moulding, and fluoroplastics and steel pipe integral type extrusion moulding,
Avoid fluorine to mould pipe and produce pore when extrusion molding, not only increase fluorine and mould the stable connection of pipe and steel pipe
Property, moreover it is possible to improve isolation effect, extend steel pipe service life, additionally it is possible at the steel that bore is less
Extrude the less fluorine of thickness on pipe and mould pipe, form small-diameter, thin-walled fluorine Plastic Steel Pipe, reduce material
Material cost, reduces the thermal resistance of finished product and improves the heat transfer effect of finished product.Additionally, the present invention
Improved the mobility of fluoroplastics powder by pretreatment further, enter a product preventing pore
Raw；Production efficiency is improve by integral type continuous extrusion molding；By cured and removal
Stress processes, and completes fixed line and eliminates the stress in fluorine Plastic Steel Pipe, further increases connection steady
Qualitative, extend steel pipe service life.Therefore, the present invention can not only avoid the generation of pore,
Improve connective stability, improve isolation effect, extend steel pipe service life, also there is material
This is the most relatively low, finished product thermal resistance is little, finished product good effect of heat exchange and the high advantage of production efficiency.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but is not intended as the present invention
The foundation limited.
Embodiment one.A kind of fluorine Plastic Steel Pipe production method, comprises the following steps:
A, centrifugal roguing, use centrifuge to make the centrifugal rotation of fluoroplastics powder, pass through centrifugal force
By the Impurity removal in fluoroplastics powder, obtain A product；
B, A product are carried out plastics processing, make A product enter plasticizing flow regime, obtain B product；
C, by high pressure extruder, B product are clamp-oned in mould, make B product extrusion molding continuously even
The outer surface of steel tube that speed moves axially, by B product and steel pipe integral type continuous extrusion molding, obtains C
Product；
D, C product are passed through solidifying channel heating after, then be removed stress process, obtain finished product.
Integral type continuous extrusion in described step c is shaped to, and is placed in mould by steel pipe, makes
Between mould and outer surface of steel tube formed die cavity, finally B product are clamp-oned in die cavity with steel pipe one
Formula extrusion moulding, steel pipe at the uniform velocity moves in mould simultaneously, makes B product extrusion molding continuously at steel pipe
Outer surface.Plastics processing in described step b is, adding quality in A product is A quality
The solvent naphtha of 25%, is subsequently placed in the sealed thermostat case of 50 DEG C 12 hours.
Embodiment two.A kind of fluorine Plastic Steel Pipe production method, comprises the following steps:
A, centrifugal roguing, use centrifuge to make the centrifugal rotation of fluoroplastics powder, pass through centrifugal force
By the Impurity removal in fluoroplastics powder, obtain A product；
B, first A product are carried out pretreatment, then A product are carried out plastics processing, make A product enter
Plasticizing flow regime, obtains B product；Described pretreatment is, adding quality in A product is A quality
The aerial kerosene of amount 1%～3%, stands at normal temperatures after stirring and stacks 11h～12h i.e.
Can；
C, by high pressure extruder, B product are clamp-oned in mould, make B product extrusion molding continuously even
The outer surface of steel tube that speed moves axially, by B product and steel pipe integral type continuous extrusion molding, obtains C
Product；
D, C product are passed through solidifying channel heating after, then be removed stress process, obtain finished product.
Integral type continuous extrusion in described step c is shaped to, and is placed in mould by steel pipe, makes
Between mould and outer surface of steel tube formed die cavity, finally B product are clamp-oned in die cavity with steel pipe one
Formula extrusion moulding, steel pipe at the uniform velocity moves in mould simultaneously, makes B product extrusion molding continuously at steel pipe
Outer surface.High pressure extruder in described step c applies the extruding force of 20MPa to B product, and
Clamp-on in mould after B product are heated to 65 DEG C；The speed that moves axially of described steel pipe is 0.7
M/min.The bore of described steel pipe is 10mm～60mm, and steel pipe thickness is 0.5mm～6mm, type
The thickness in chamber is 0.3mm～3mm；Described fluoroplastics powder is PTFE powder.Described step b
In plastics processing be that adding quality in A product is the solvent naphtha of A quality 25%, then
It is placed in the sealed thermostat case of 50 DEG C 12 hours.
In described step d, solidifying channel includes that 4 segment length being sequentially connected with are 3 meters logical
Road, 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, logical
Cross 4 sections of passages and C product are progressively heated to 400 DEG C；C product translational speed in solidifying channel
It it is 0.7 m/min.Described step d goes de-stress to be processed as, leads to the speed of 0.7 m/min
Cool down in entering cooling duct；The cooling section of cooling duct include being sequentially connected with 300 DEG C,
The air cooling section of 100 DEG C and the water-cooled section of room temperature, a length of 3 meters of cooling section, air cooling segment length is
7 meters, water-cooled segment length is 2 meters, and through cooling duct, C product are progressively often down to from 400 DEG C
Temperature.
Claims (9)
1. a fluorine Plastic Steel Pipe production method, it is characterised in that comprise the following steps:
A, centrifugal roguing, use centrifuge to make the centrifugal rotation of fluoroplastics powder, pass through centrifugal force
By the Impurity removal in fluoroplastics powder, obtain A product；
B, A product are carried out plastics processing, make A product enter plasticizing flow regime, obtain B product；
C, by high pressure extruder, B product are clamp-oned in mould, make B product extrusion molding continuously even
The outer surface of steel tube that speed moves axially, by B product and steel pipe integral type continuous extrusion molding, obtains C
Product；
D, C product are passed through solidifying channel heating after, then be removed stress process, obtain finished product.
A kind of fluorine Plastic Steel Pipe production method the most according to claim 1, it is characterised in that:
Integral type continuous extrusion in described step c is shaped to, and is placed in mould by steel pipe, makes mould
And between outer surface of steel tube, form die cavity, finally B product are clamp-oned in die cavity and squeeze with steel pipe integral type
Molded, steel pipe at the uniform velocity moves in mould simultaneously, makes B product extrusion molding continuously at steel pipe surface
Face.
A kind of fluorine Plastic Steel Pipe production method the most according to claim 2, it is characterised in that:
High pressure extruder in described step c applies the extruding force of 20MPa to B product, and is added by B product
Heat is clamp-oned in mould after 65 DEG C；The speed that moves axially of described steel pipe is 0.7 m/min.
A kind of fluorine Plastic Steel Pipe production method the most according to claim 2, it is characterised in that:
The bore of described steel pipe is 10mm～60mm, and steel pipe thickness is 0.5mm～6mm, the thickness of die cavity
Degree is 0.3mm～3mm；Described fluoroplastics powder is PTFE powder.
A kind of fluorine Plastic Steel Pipe production method the most according to claim 1, it is characterised in that:
Described step b is, A product first carries out pretreatment, then A product are carried out plastics processing, make A
Product enter plasticizing flow regime, obtain B product.
A kind of fluorine Plastic Steel Pipe production method the most according to claim 5, it is characterised in that:
Described pretreatment is, adds the aerial kerosene that quality is A quality 1%～3% in A product,
Stand at normal temperatures after stirring and stack 11h～12h.
A kind of fluorine Plastic Steel Pipe production method the most according to claim 1, it is characterised in that:
Plastics processing in described step b is, adding quality in A product is the molten of A quality 25%
Agent oil, is subsequently placed in the sealed thermostat case of 50 DEG C 12 hours.
8. raw according to a kind of fluorine Plastic Steel Pipe described in any claim in claim 1 to 7
Product method, it is characterised in that: in described step d, solidifying channel includes 4 segment lengths being sequentially connected with
Degree is the passage of 3 meters, and the heating-up temperature of 4 sections of passages is followed successively by 100 DEG C, 200 DEG C, 300 DEG C
With 400 DEG C；C product translational speed in solidifying channel is 0.7 m/min.
9. raw according to a kind of fluorine Plastic Steel Pipe described in any claim in claim 1 to 7
Product method, it is characterised in that: described step d go de-stress to be processed as, with 0.7 m/min
Speed be passed through cooling duct in cool down；Cooling duct include being sequentially connected with 300 DEG C
Cooling section, the air cooling section of 100 DEG C and the water-cooled section of room temperature, a length of 3 meters of cooling section, air cooling
Segment length is 7 meters, and water-cooled segment length is 2 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610576492.8A CN105946194B (en) | 2016-07-20 | 2016-07-20 | A kind of fluorine plastic-steel pipe production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610576492.8A CN105946194B (en) | 2016-07-20 | 2016-07-20 | A kind of fluorine plastic-steel pipe production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105946194A true CN105946194A (en) | 2016-09-21 |
| CN105946194B CN105946194B (en) | 2018-04-10 |
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| CN201610576492.8A Active CN105946194B (en) | 2016-07-20 | 2016-07-20 | A kind of fluorine plastic-steel pipe production method |
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Citations (5)
| 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 |
-
2016
- 2016-07-20 CN CN201610576492.8A patent/CN105946194B/en active Active
Patent Citations (5)
| 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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| CN105946194B (en) | 2018-04-10 |
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Effective date of registration: 20170615 Address after: 324000 No. 9 warehouse Road, Quzhou, Zhejiang Applicant after: Quzhou Bai Qiang new Mstar Technology Ltd Address before: Hangzhou City, Zhejiang province 310000 Gongshu District Fengtan Road No. 380 intime city C, 12A Applicant before: Hangzhou the last one hundred Energy Science Co., Ltd |
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