CN201389977Y - Special nose for continuous production two-way stretching PVC pipe - Google Patents
Special nose for continuous production two-way stretching PVC pipe Download PDFInfo
- Publication number
- CN201389977Y CN201389977Y CN200920020451U CN200920020451U CN201389977Y CN 201389977 Y CN201389977 Y CN 201389977Y CN 200920020451 U CN200920020451 U CN 200920020451U CN 200920020451 U CN200920020451 U CN 200920020451U CN 201389977 Y CN201389977 Y CN 201389977Y
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- China
- Prior art keywords
- pipe
- core
- cooling body
- homogenizing
- axial tension
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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.)
- Expired - Fee Related
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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
- B29C48/03—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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model provides a special nose for a continuous production two-way stretching PVC pipe, which comprises a molten material shunt shaping body, a molten pipe blank homogenizing body, a pipe blank cooling body, a radial stretching body and an axial stretching body, and is characterized in that a high-strength sealing connection structure is arranged between the molten pipe blank homogenizing body and the pipe blank cooling body, and a heat insulating layer is added; the core moulds and the outer moulds of the pipe blank cooling body, the radial stretching body and the axial stretching body are cooled by a labyrinth runner; the labyrinth runner adopts a water distribution unit of a water distribution loop, thereby simplifying the production process, reducing the impact of environmental factors on the production process, well realizing the two-way stretching effect in one step, preventing the energy waste in the heat insulating and cooling processes, and preventing the high pressure of a mould cavity from damaging a mould.
Description
Technical field
The utility model relates to a kind of plastic extruder head, especially a kind of extruded bidirectional stretched plastic tubing head.
Background technology
In the existing polychloroethylene pipes production used die head all be with happy and harmonious material base through the spreader shunting, typing becomes the cylindric tubulose material base of molten state, pipe is through one section straight stable section, after material structure tends towards stability, the pipe extrusion die of fusion.Under the traction of hauling machine, the pipe of fusion enters the cooling of finalizing the design of Vacuum shaping groove, becomes the stable tubing of apparent size.Existing external and domestic production technology is also developed on this technical foundation.Recognize from documents and materials, polyvinyl chloride pipe stretched in two directions is (English the be called for short PVC-0) of the YorkshireImperialPlastics of Britain in the leading exploitation seventies, Australian Vinidex was arranged afterwards, U.S. Uponor-ETI, Holland Polva and French Seperef produce, and domestic also have enterprise and scientific research institution to research and develop this production technology.Early stage what adopt all is ' off-line ' processing technology (two step processing methods), is extrusion molding and the PVC-U tubing section cooled off to be expand into by heating and pressurization require size to realize being orientated in mould.But off-line processing technology speed of production is low, and equipment investment height (the unit output) is difficult to promote.Developed afterwards that ' online ' is orientated in extrusion process, produced the production technology of PVC-0 continuously.Be exactly on the tubing extruding production line, the PVC-U tubing of extrusion molding by radially expansion and axial stretching realize biaxial orientation, cooling and shaping becomes PVC-0 tubing then.From present disclosed data, the front portion of production line is the common line of extruding, and extrudes the thick pipe that is used as the material embryo continuously, and the fixed bit in the material embryonic tube is equipped with two cock bodys; ' batcher ' in front and at ' expandable plug ' of back.Under the temperature of controlling well, between two cock bodys, import water under high pressure by interior operation pipe and realize the expansion radially of material embryonic tube, realize the axial tension of material embryonic tube simultaneously by hauling speed difference before and after the production line.Expandable plug will correspondingly expand and keep sealing (sliding all the time between plug face and the pipe material inner wall) to water under high pressure between two plugs in this process.At last the tubing cooling and shaping of having realized biaxial orientation through radially expansion and axial stretching.Though this technology has kept existing production technology, heating process has caused the waste of the energy again, has increased cost, and also there is operational difficulty in radial dilatation technology owing to add compression swelling, causes stopping accident easily.
Summary of the invention
The purpose of this utility model is to provide a kind of special-purpose head of continuous production polyvinyl chloride pipe stretched in two directions.
The technical scheme that the utility model adopted is: the special-purpose head of producing polyvinyl chloride pipe stretched in two directions continuously, form by melting charge shunting forming body, fusion pipe homogenizing body, pipe cooling body, radial drawing body, axial tension body five parts, it is characterized in that: be the high strength structure that is tightly connected between fusion pipe homogenizing body and the pipe cooling body, and install thermal insulation layer additional, the core of pipe cooling body, radial drawing body and axial tension body and external mold all adopt the labyrinth path cooling, and labyrinth path adopts the water-distributing device of cloth water ring.
The main design data of head is:
1) fusion pipe homogenizing body length is 10 times of this section die cavity gap;
2) adopt bolt to connect between fusion pipe homogenizing body and the pipe cooling body;
3) thermal insulation layer between fusion pipe homogenizing body and pipe cooling body is the not thermal conductor of an annular;
4) be uniform-distribution with many hollow pipelines along circumference in the external mold of pipe cooling body, radial drawing body and axial tension body and the core, pipeline has circular pipe identical on the left side of pipe cooling body and the right side of axial tension body;
5) between the circular pipe and circumferential many hollow pipelines of inlet, be provided with a water-locator, the shape of water-locator is a torus, and a hole littler than hollow pipeline aperture arranged in the position over against hollow pipeline;
6) connector of pipeline all designs the right side at head;
7) pipeline of core leads to the mould outside by the air flue at core center and the air flue in the shunting support;
8) pipe cooling body length be this section die cavity gap 60-80 doubly;
9) the radial drawing body is a circular cone expansion body, and the chamber area of the arbitrary section of circular cone expansion body equates that the height of radial drawing body is between pipe cooling body external mold inner diameter values and the external mould inner diameter values of axial tension.The angle of flare of radial drawing body is 90-150 °, and radial drawing is than being 1.8-2.7;
10) axial tension phantom chamber is a cylindrical shape, the core external diameter be institute's production tube outer diameter 1.01-1.18 doubly, the core height be tube outer diameter 0.6-1.2 doubly, the external mold height be tube wall thickness 3-8 doubly, the die cavity gap for 1.2-1.5 times of production tube wall thickness.
Compared with prior art, the utility model has the advantages that:
The cooling and the biaxial tension of the shunting of fusion material base, homogenizing typing and fusion material base are integrated on the cover head, have save loaded down with trivial details production procedure, reduced the influence of environmental factor production process.
Adopt the connected mode of high strength, strong sealing, overcome pipe and cooled off the leakage material that the die cavity high pressure in the process that causes causes, well realized the effect of one-step method biaxial tension.
The energy dissipation in insulation and the cooling procedure has been avoided in the design of employing effectively insulating.
Employing is cooled off mould along the equally distributed hollow pipeline of circumference, has improved the bearing capacity of mould, avoids the die cavity high pressure that mould is damaged.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a broken circle part enlarged drawing among Fig. 1,
Fig. 3 is the mating surface position enlarged drawing of fusion material base homogenizing body and pipe cooling body,
Fig. 4 is the water-locator enlarged drawing of pipe cooling body external mold conduction oil hollow pipeline porch.
Fig. 5 is the enlarged drawing of pipe cooling body core conduction oil hollow pipeline porch.
Among Fig. 1: 1 for melting charge shunting forming body, 2 for fusion pipe homogenizing body, 3 be the pipe cooling body, 4 for radial drawing body, 5 for axial tension body, 6 is connecting bolt, 7 be hollow pipeline, 8 for thermal insulation layer, 9 for the external mould of fusion material base homogenizing, 10 for the molten mass core, 11 for pipe cooling body core, 12 for pipe cooling body external mold, 13 for core coolant flow channel end sealing ring, 14 for heat insulating mattress, 15 be that water-locator, 16 is a water-locator.
The specific embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
Produce the special-purpose head of polyvinyl chloride pipe stretched in two directions continuously, form by melting charge shunting forming body 1, fusion pipe homogenizing body 2, pipe cooling body 3, radial drawing body 4, axial tension body 5 five parts, be the high strength structure that is tightly connected between fusion pipe homogenizing body 1 and the pipe cooling body 3, and install thermal insulation layer 8 additional, the core of pipe cooling body 3, radial drawing body 4 and axial tension body 5 and external mold all adopt the labyrinth path cooling, and labyrinth path adopts the water-distributing device of cloth water ring.
The main design data of head is:
1) fusion pipe homogenizing body 2 length are 10 times of this section die cavity gap;
2) adopt bolt to connect between fusion pipe homogenizing body 2 and the pipe cooling body 3;
3) thermal insulation layer 8 between fusion pipe homogenizing body 2 and pipe cooling body 3 is not thermal conductors of an annular;
4) be uniform-distribution with many hollow pipelines 7 along circumference in the external mold of pipe cooling body 3, radial drawing body 4 and axial tension body 5 and the core, hollow pipeline 7 is identical with the circular pipe on the right side of axial tension body on the left side of pipe cooling body 3;
5) between the circular pipe and circumferential many hollow pipelines 7 of inlet, be provided with a water-locator 15, the shape of water-locator 15 is torus, has one in the position over against hollow pipeline 7 than little hole, hollow pipeline 7 apertures;
6) connector of pipeline all designs the right side at head;
7) pipeline of core leads to the mould outside by the air flue at core center and the air flue in the shunting support;
8) pipe cooling body 3 length be this section die cavity gap 60-80 doubly;
9) radial drawing body 4 is a circular cone expansion body, the chamber area of the arbitrary section of circular cone expansion body equates, the height of radial drawing body is between pipe cooling body 3 external mold inner diameter values and axial tension body 5 external mold inner diameter values, the angle of flare of radial drawing body 4 is 90-150 °, and radial drawing is than being 1.8-2.7;
10) axial tension body 5 die cavitys are cylindrical shapes, the core external diameter be institute's production tube outer diameter 1.01-1.18 doubly, the core height be tube outer diameter 0.6-1.2 doubly, the external mold height be tube wall thickness 3-8 doubly, the die cavity gap for 1.2-1.5 times of production tube wall thickness.
Connecting bolt 6 couples together external mould of fusion material base homogenizing and pipe cooling body external mold, and hollow pipeline 7 evenly distributes along circumference, is used for cooling off die head, the control die head temperature.Each hollow pipeline 7 is communicated with a circular pipe respectively at two ends, be brought together then, connects the import and export of conduction oil.
Water-locator 15 is uniform the annular pads with hollow pipeline 7 as many pores, and conduction oil is sprayed onto in the hollow pipeline 7 by these holes, can guarantee that like this fluid flow in all hollow pipelines 7 is consistent with heat output, guarantees to conduct heat evenly.Empty footpath generally is 0.3 times of hollow pipeline 7 diameters, to guarantee to form certain pressure.
Water-locator 16 structures of pipe cooling body core conduction oil hollow pipeline 7 porch are the same with water-locator 15.
A lot of high molecular polymers can significantly be gained in strength and toughness along the molecules align direction by molecularly oriented, and polyvinyl chloride is no exception.Think in theory,, on differently-oriented directivity, can reach good intensity and toughness near glassy state the time when plastics stretch.Be about 175-185 ℃ for its viscous state temperature of polyvinyl chloride, glass transition temperature is 85-110 ℃.Technical essential of the present utility model is exactly that the material base of viscous state is cooled near glassy state in the integrated mould of a cover, carries out biaxial tension then.
Raw material through the extruder plastifying fusion, in melting charge shunting forming body 1, be fixed to the tubulose material base, the tubulose material base discharges stress in homogenizing body 2, the weld mark fusion, become the tubulose material base of uniformity, this moment, the pipe of molten state formed, next step is exactly that tubulose material base with molten state cools near glassy state, this process all is to carry out in accurately being controlled near the die head of glassy state temperature by biaxial tension up to pipe, and the conduction oil that flows in the temperature control pattern body of this part mould is taken away the heat that the material base cooling discharges.In pipe cooling body 3, the pipe of molten state is cooled to gradually near glassy state, then in radial drawing body 4 by radial oriented, radial oriented material base is easy to take place disorientation, so need an inner support character plug keep radial oriented achievement, Here it is wants longer reason at axial tension body 5 core moulds.In axial tension body 5, under the draw of hauling machine, pipe is again by axial tension, the radial and axial like this pipe that all is oriented has just formed, at this moment pipe temperature is very than higher, the achievement that can not keep radial and axial orientation is in time under the cooling normal temperature, promptly below the glassy state temperature.At this moment just used conventional vacuum sizing groove.The pipe of biaxial tension is close to calibration sleeve and is cooled off under the effect of vacuum, guaranteed the external diameter that pipe is certain.
There are two zones in the thermal treatment zone and cooling zone in the die head of this integrated form, and they are separated by heat insulating mattress 8 and 14, avoids scattering and disappearing of heat.Melting charge shunting forming body 1 and tubulose material base are to control by the heating constant-temperature system on the die body in the insulation of homogenizing body 2, scatter and disappear with the compensation heat.The temperature control of pipe cooling body 3 is to control by the flow of the conduction oil in the labyrinth type coolant flow channel and temperature, and the heat that material base is distributed is in time taken away.Temperature is all accurately measured by thermocouple in each functional areas, and controls the speed of heating and cooling automatically, and temperature control precision is very high, can accurately regulate the temperature of each functional areas.
Claims (3)
1, produces the special-purpose head of polyvinyl chloride pipe stretched in two directions continuously, form by melting charge shunting forming body, fusion pipe homogenizing body, pipe cooling body, radial drawing body, axial tension body five parts, it is characterized in that between fusion pipe homogenizing body and the pipe cooling body being the high strength structure that is tightly connected, and installing thermal insulation layer additional, the core of pipe cooling body, radial drawing body and axial tension body and external mold all adopt the labyrinth path cooling.
2, the special-purpose head of continuous production polyvinyl chloride pipe stretched in two directions according to claim 1 is characterized in that labyrinth path adopts the water-distributing device of cloth water ring.
3, the special-purpose head of continuous production polyvinyl chloride pipe stretched in two directions according to claim 1 is characterized in that the main design data of head is:
1) fusion pipe homogenizing body length is 10 times of this section die cavity gap;
2) adopt bolt to connect between fusion pipe homogenizing body and the pipe cooling body;
3) thermal insulation layer between fusion pipe homogenizing body and pipe cooling body is the not thermal conductor of an annular;
4) be uniform-distribution with many hollow pipelines along circumference in the external mold of pipe cooling body, radial drawing body and axial tension body and the core, pipeline has circular pipe identical on the left side of pipe cooling body and the right side of axial tension body;
5) between the circular pipe and circumferential many hollow pipelines of inlet, be provided with a water-locator, the shape of water-locator is a torus, and a hole littler than hollow pipeline aperture arranged in the position over against hollow pipeline;
6) connector of pipeline all designs the right side at head;
7) pipeline of core leads to the mould outside by the air flue at core center and the air flue in the shunting support;
8) pipe cooling body length be this section die cavity gap 60-80 doubly;
9) the radial drawing body is a circular cone expansion body, the chamber area of the arbitrary section of circular cone expansion body equates, the height of radial drawing body is between pipe cooling body external mold inner diameter values and the external mould inner diameter values of axial tension, and the angle of flare of radial drawing body is 90-150 °, and radial drawing is than being 1.8-2.7;
10) axial tension phantom chamber is a cylindrical shape, the core external diameter be institute's production tube outer diameter 1.01-1.18 doubly, the core height be tube outer diameter 0.6-1.2 doubly, the external mold height be tube wall thickness 3-8 doubly, the die cavity gap for 1.2-1.5 times of production tube wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920020451U CN201389977Y (en) | 2009-04-07 | 2009-04-07 | Special nose for continuous production two-way stretching PVC pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920020451U CN201389977Y (en) | 2009-04-07 | 2009-04-07 | Special nose for continuous production two-way stretching PVC pipe |
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| Publication Number | Publication Date |
|---|---|
| CN201389977Y true CN201389977Y (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920020451U Expired - Fee Related CN201389977Y (en) | 2009-04-07 | 2009-04-07 | Special nose for continuous production two-way stretching PVC pipe |
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| CN (1) | CN201389977Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108974A (en) * | 2015-09-28 | 2015-12-02 | 湖南鑫高自动化设备有限公司 | Pipe blank injection molding method and pipe blank mold for high-capacity plastic bottles |
| CN105172097A (en) * | 2015-07-29 | 2015-12-23 | 佛山市日丰企业有限公司 | Online biaxial orientation extrusion mold for plastic small-caliber tube |
| CN105196514A (en) * | 2015-07-29 | 2015-12-30 | 佛山市日丰企业有限公司 | Extrusion molding mould of online biaxially oriented plastic large diameter pipe |
| CN105235228A (en) * | 2015-07-29 | 2016-01-13 | 佛山市日丰企业有限公司 | Technological method and device for preparing biaxial orientation plastic pipe through one-step method |
| CN106346739A (en) * | 2016-08-31 | 2017-01-25 | 浙江飞龙管业有限公司 | Production tooling and production method of solid-wall CO pipe |
| CN107553885A (en) * | 2016-06-30 | 2018-01-09 | 新疆天业（集团）有限公司 | A kind of double orientation stretching device |
| CN108582720A (en) * | 2018-07-10 | 2018-09-28 | 南塑建材塑胶制品（深圳）有限公司 | A kind of polyolefin pipe extrusion die |
| CN109676891A (en) * | 2018-12-20 | 2019-04-26 | 山东东宏管业股份有限公司 | One kind is for non-excavation rehabilitation hdpe pipe and preparation method thereof |
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2009
- 2009-04-07 CN CN200920020451U patent/CN201389977Y/en not_active Expired - Fee Related
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| CN105196514B (en) * | 2015-07-29 | 2019-01-18 | 日丰企业集团有限公司 | A kind of extrusion molding mould of online biaxial orientation plastics heavy caliber pipe |
| CN105196514A (en) * | 2015-07-29 | 2015-12-30 | 佛山市日丰企业有限公司 | Extrusion molding mould of online biaxially oriented plastic large diameter pipe |
| CN105235228A (en) * | 2015-07-29 | 2016-01-13 | 佛山市日丰企业有限公司 | Technological method and device for preparing biaxial orientation plastic pipe through one-step method |
| CN105172097B (en) * | 2015-07-29 | 2019-05-07 | 日丰企业集团有限公司 | A kind of extrusion molding mould of online biaxial orientation plastics minor caliber pipe |
| CN105172097A (en) * | 2015-07-29 | 2015-12-23 | 佛山市日丰企业有限公司 | Online biaxial orientation extrusion mold for plastic small-caliber tube |
| CN105108974A (en) * | 2015-09-28 | 2015-12-02 | 湖南鑫高自动化设备有限公司 | Pipe blank injection molding method and pipe blank mold for high-capacity plastic bottles |
| CN105108974B (en) * | 2015-09-28 | 2016-09-28 | 湖南昊兴机械科技有限公司 | The pipe embryo injection molding forming method of a kind of Large Copacity plastic bottle and pipe embryo mould |
| CN107553885A (en) * | 2016-06-30 | 2018-01-09 | 新疆天业（集团）有限公司 | A kind of double orientation stretching device |
| CN106346739B (en) * | 2016-08-31 | 2018-12-14 | 浙江飞龙管业有限公司 | A kind of the production tooling and production method of solid wall CO pipe |
| CN106346739A (en) * | 2016-08-31 | 2017-01-25 | 浙江飞龙管业有限公司 | Production tooling and production method of solid-wall CO pipe |
| CN108582720A (en) * | 2018-07-10 | 2018-09-28 | 南塑建材塑胶制品（深圳）有限公司 | A kind of polyolefin pipe extrusion die |
| CN108582720B (en) * | 2018-07-10 | 2023-08-29 | 南塑建材塑胶制品（深圳）有限公司 | Polyolefin pipeline extrusion die |
| CN109676891A (en) * | 2018-12-20 | 2019-04-26 | 山东东宏管业股份有限公司 | One kind is for non-excavation rehabilitation hdpe pipe and preparation method thereof |
| CN109676891B (en) * | 2018-12-20 | 2021-07-02 | 山东东宏管业股份有限公司 | High-density polyethylene pipe for trenchless restoration and preparation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20150407 |
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| EXPY | Termination of patent right or utility model |