CN105599314B - A kind of apparatus for continuous formation and method of work of biaxially orienting polyvinyl chloride tubing - Google Patents
A kind of apparatus for continuous formation and method of work of biaxially orienting polyvinyl chloride tubing Download PDFInfo
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- CN105599314B CN105599314B CN201511003783.XA CN201511003783A CN105599314B CN 105599314 B CN105599314 B CN 105599314B CN 201511003783 A CN201511003783 A CN 201511003783A CN 105599314 B CN105599314 B CN 105599314B
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- polyvinyl chloride
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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
- B29C48/90—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
- B29C48/901—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 of hollow bodies
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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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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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
-
- 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
- B29C48/905—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 wet calibration, i.e. in a quenching tank
Abstract
The present invention relates to a kind of apparatus for continuous formation and method of work of biaxially orienting polyvinyl chloride tubing.The apparatus for continuous formation of the biaxially orienting polyvinyl chloride tubing, including external mold, core, pipe cooling system, double orientation stretch forming system；The pipe cooling system includes, low-pressure inlet pipe, lead, division board, temperature adjustable water immersion water tank and sealing ring；The double orientation stretch forming system includes, conical orientation mould, sizing cooling water tank, high-pressure pipe, hauling machine, pressure bladder and air bag pull bar；The apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing of the present invention, make to reach after extrusion the pipe cooling before glass transition temperature uniformly and eliminate pipe internal stress；And tubing is increased the supportive of hauling machine, the balance of traction is ensure that, so as to ensure that tubing quantity-produced is reliable and stable.
Description
Technical field
The present invention relates to a kind of apparatus for continuous formation and method of work of biaxially orienting polyvinyl chloride tubing, belong to plastic tube
The technical field of material extrusion molding instrument.
Background technology
With the lifting to environmental problem attention rate, there is saving material in people, reduce energy consumption and reduce carbon emission amount
Deng requirement, coming years PVC-O pipe, in particular for supplying water, is drunk as the pipe-line system solution of these requirements is met
With fields such as water and waste water.PVC-O has obvious advantage relative to non-polymer tubing, and not only carbon emission amount is far below as ball
Traditional product as graphite cast iron pipe, there is not yet etching problem.In addition, up-to-date information shows, PVC-O tubing is in feedwater piping
Install even better than polyolefin (PO) class pipeline, such as PE100 pipelines.
The molecule biaxial orientation of PVC-O tubing is typically realized by different approach：
A kind of mode is the offline processing technology of two-step method, first under forming temperature, extrusion molding PVC-U pipes, then
Ring and axial orientation are carried out to pipe under specified conditions.
Another way is one-step method on-line machining technique, in tube forming process while the tubing quilt after biaxial orientation
It is rapidly cooled to room temperature.This tubing being oriented is stable in glass transition temperature (75 DEG C of ≈) following structure.Herein
Temperature above material is in rubbery state, and after temperature rise, tubing can be retracted to original dimension.
Layer structure is presented after pipe material molecularly oriented.This structure can resist nibs and tubing table in material
Brittle break caused by the cut in face.Therefore, PVC-O has higher notched impact properties, is also spread rapidly without crackle
Risk, tubing orientation after material circumferential force and impact resistance be improved.
Two-step method processed and applied is more early, and Processes and apparatus is simple, but low production efficiency, consumes the energy and human cost.
And the one-step method relative productivity for starting application at present greatly improves, required manpower, energy resource consumption are relatively low, but apparatus and process
More complicated, pipe chilling temperature and pipe are bad because internal stress caused by chilling controls, and cross and draw because tube wall is thin after tube forming
Machine causes pipe biaxial tension post-tensioning more difficult than control and wall thickness debugging, influences PVC-O pipes because the small traction of support force is skidded
The end-use properties of material.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing.
The present invention also provides a kind of method of work of the apparatus for continuous formation of above-mentioned biaxially orienting polyvinyl chloride tubing.
Technical scheme is as follows：
A kind of apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, including it is external mold, core, pipe cooling system, double
Orientation stretching formation system；The pipe cooling system includes, low-pressure inlet pipe, lead, division board, temperature adjustable water immersion water
Case and sealing ring；The side wall of lead is provided with the gentle capsule stomata of high pressure stomata, low pressure stomata；Low-pressure inlet pipe through core with
Low pressure stomata connects；The radial section airtight connection of temperature adjustable water immersion water tank and external mold.Pipe is extruded between external mold and core
Enter temperature adjustable water immersion water tank afterwards, the water in temperature adjustable water immersion water tank contacts with pipe to be cooled down to pipe；
The double orientation stretch forming system includes, conical orientation mould, sizing cooling water tank, high-pressure pipe, hauling machine,
Pressure bladder and air bag pull bar；The air bag pull bar is hollow structure；Conical orientation mold cavity is provided with high pressure stomata；Height is pressed into
Tracheae connects through core with high pressure stomata；Pressure bladder connects with air bag pull bar；
The core, lead and conical orientation mould sequentially coaxially connect；The effect of lead is that pipe is oriented to
And connect conical orientation mould below；The outer tapered portions of conical orientation mould point carry out double to the pipe for being not up to glass transition temperature
Orientation is oriented to stretching.
Low-pressure inlet pipe makes pipe keep tube-like condition when being cooled to before glass transition temperature and makes pipe micro- swollen, eliminates anxious
Cold stress.High-pressure pipe adjusts tube outer diameter and improves tubing support force when tubing is compressed by traction；Pass through air bag air admission hole
Air inlet adjustment pressure bladder pressure, makes pressure bladder keep a pressure, and pressure bladder outer wall is close to the pipe material inner wall after shaping.
Preferably, the left and right ends of the sizing cooling water tank are respectively arranged with calibration sleeve and annulus sealing gasket.Calibration sleeve
Sealing, which is adjacent to, with annulus sealing gasket and outer pipe wall plays sealing function.
Pressure bladder should be able to make pressure bladder be placed in hauling machine by air bag tie rods and transmission and air pressure, air bag pull bar length
Rear, so that tube chamber keeps air pressure when tubing passes through hauling machine, tubing support force is improved, is improved in tubing continuous flow procedure
Stability and reliability.
Preferably, the apparatus for continuous formation of the biaxially orienting polyvinyl chloride tubing also includes pinch roller support frame；Pinch roller branch
Support is rotatably arranged in sizing cooling water tank side wall, and rotational plane is vertical direction；Pass through threaded screw rod on pinch roller support frame
It is connected with multiple pinch rollers.Pinch roller support frame can 360 ° rotation regulation, screw thread is passed through according to the tube wall thickness deviation after shaping
The elastic and regulation puck position of screw mandrel regulation relevant position pinch roller；The pinch roller is rigid plastics, and surface is smooth.
Preferably, temperature adjustable water immersion water tank is connected with external mold by screw mandrel；Between temperature adjustable water immersion water tank and external mold
It is provided with division board；The one end of temperature adjustable water immersion water tank away from external mold is provided with rubber blanket.Division board isolates high temperature, protects mould
Body, while play a part of sealing and anti-leakage water.It is further preferred that the division board is polyfluortetraethylene plate.Rubber blanket is close to
Pipe outer wall is blocked, to ensure that it is water-tight that cistern water level is totally submerged pipe.
Preferably, lead and conical orientation the mould outer surface is smooth surface.
Preferably, the pawl number of the hauling machine is more than or equal to three, and the hauling machine is provided with non-slip rubber block.
Preferably, the pressure bladder is rubber pneumatic bag.The wearability of rubber pneumatic bag is higher.
A kind of method of work of the apparatus for continuous formation of above-mentioned biaxially orienting polyvinyl chloride tubing, including step are as follows：
1) pipe is extruded between external mold, core, is passed through sealing ring through lead, is opened low-pressure inlet pipe, gas passes through
Core, export, make in the low pressure seal region that pipe, core and lead surround in formation from the low pressure stomata of lead side
Pressure；
2) pipe is cooled down through temperature adjustable water immersion water tank；The air pressure in low-pressure inlet pipe is adjusted, is leading pipe
Tubulose is kept to outside post and produces expansion, caused internal stress in elimination pipe temperature-fall period (when i.e. pipe goes out external mold, core
200 DEG C or so drop to caused internal stress before glass transition temperature), adjust temperature adjustable water immersion water tank in water temperature, make pipe from
Temperature when temperature adjustable water immersion water tank comes out (is maintained at more than PVC glass transition temperature, PVC glass more than 90 DEG C
The scope of glass temperature is 80 DEG C -90 DEG C)；
3) continue traction and not yet reach the pipe of glass transition temperature through conical orientation mould progress radially, longitudinally double orientation drawing
Stretch, the pipe after double orientation stretching forms tubing, and tubing cools down through sizing cooling water tank to the tubing after stretching；Pipe
Material crosses the position of pressure bladder, opens air bag air admission hole, and gas passes through core, lead, conical orientation mould and air bag successively
Pressure bladder is reached after pull bar, pressure bladder is close to pipe material inner wall after inflating；
4) high-pressure pipe is opened, gas by core, lead, conical orientation mould, makes conical orientation mould, sealing successively
Internal pressure is formed in the tubing inner region that air bag and pipe material inner wall are formed；Air pressure in adjusting high-pressure air inlet pipe, make tubing tight
Calibration sleeve is pasted, sizing cooling water tank is cooled down and shaped to tubing, tubing is reached satisfactory diameter and in vitrifying
Shaped below temperature.
Preferably, it is provided with recirculated water in the pipe cooling water tank and in sizing cooling water tank；Sizing cooling water tank
The mode of tubing cooling is cooled down for fountain or immersion type cools down.
Preferably, the air pressure range in the high-pressure pipe is 0.05~1MPa；Air pressure range in low-pressure inlet pipe
For 0.01~0.1MPa；Air pressure range in air bag pull bar is 0.1~1MPa.
The usefulness of the invention is：
1st, the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing of the present invention, reaches glass transition temperature after making extrusion
Preceding pipe cooling is uniform and eliminates pipe internal stress；And tubing is increased the supportive of hauling machine, it ensure that the flat of traction
Weighing apparatus, so as to ensure that tubing quantity-produced is reliable and stable；
2nd, the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing of the present invention, passes through the temperature adjustable water of controlling water temperature
Immersion water tank is uniformly cooled down to tubing, and is connected with high and low pressure air inlet pipe in pipe core rod, is disappeared by low-pressure inlet pipe regulation
It is stress-retained except pipe chilling, by high-pressure pipe tubing is reached suitable outer diameter and make tubing keep in pressure and traction
Machine forms internal and external pressure balance, avoids drawing in production and skids, ensures tubing quantity-produced stability；
3rd, the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing of the present invention, simple in construction, practicality is high, safeguards
Cost is low.
Brief description of the drawings
Fig. 1 is the schematic cross-section of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing of the present invention；
Fig. 2 is Fig. 1 partial enlarged drawing；
Wherein, 1, high-pressure pipe；2nd, low-pressure inlet pipe；3rd, air bag air admission hole；4th, external mold；5th, core；6th, division board；7、
Lead；8th, temperature adjustable water immersion water tank；9th, pipe；10th, low pressure seal region；11st, screw mandrel；12nd, sealing ring；13rd, pinch roller；
14th, conical orientation mould；15th, pinch roller support frame；16th, calibration sleeve；17th, sizing cooling water tank；18th, tubing inner region；19th, air bag is drawn
Bar；20th, hauling machine；21st, pressure bladder；22nd, shaping pipe.
Embodiment
The present invention is described in detail with reference to embodiment and Figure of description, but not limited to this.
Embodiment 1
As shown in Figure 1-2.
A kind of apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, including external mold 4, core 5, the cooling system of pipe 9,
Double orientation stretch forming system；The cooling system of pipe 9 includes, low-pressure inlet pipe 2, lead 7, division board 6, temperature adjustable water
Immersion water tank 8 and sealing ring 12；The side wall of lead 7 is provided with the gentle capsule stomata of high pressure stomata, low pressure stomata；Low-pressure inlet pipe
2 connect through core 5 with low pressure stomata；The radial section airtight connection of temperature adjustable water immersion water tank 8 and external mold 4.Pipe 9 is from outer
Enter temperature adjustable water immersion water tank 8 after being extruded between mould 4 and core 5, the water in temperature adjustable water immersion water tank 8 contacts pair with pipe 9
Pipe 9 is cooled down；
The double orientation stretch forming system includes, and conical orientation mould 14, sizing cooling water tank 17, high-pressure pipe 1, leads
Draw machine 20, pressure bladder 21 and air bag pull bar 19；The air bag pull bar 19 is hollow structure；The inner chamber of conical orientation mould 14 is provided with
High pressure stomata；High-pressure pipe 1 connects through core 5 with high pressure stomata；Pressure bladder 21 connects with air bag pull bar 19；
The core 5, lead 7 and conical orientation mould 14 sequentially coaxially connect；The effect of lead 7 is that pipe 9 is entered
Row is oriented to and connects conical orientation mould 14 below；The outer tapered portions of conical orientation mould 14 point are to being not up to glass transition temperature
Pipe 9 carries out double orientation and is oriented to stretching.
Low-pressure inlet pipe 2 makes pipe 9 keep tube-like condition when being cooled to before glass transition temperature and makes pipe 9 micro- swollen, disappears
Except chilling stress.High-pressure pipe 1 adjusts tube outer diameter and improves tubing support force when tubing is compressed by traction；Entered by air bag
The pressure of 3 air inlet adjustment pressure bladder of stomata 21, pressure bladder 21 is set to keep a pressure, after the outer wall of pressure bladder 21 is close to shaping
Pipe material inner wall.
Embodiment 2
The apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, its difference are as described in Example 1, the sizing
The left and right ends of cooling water tank 17 are respectively arranged with calibration sleeve 16 and annulus sealing gasket.Calibration sleeve 16 and annulus sealing gasket and tubing
Outer wall is adjacent to sealing and plays sealing function.
Pressure bladder 21 is stretched by air bag pull bar 19 and transmission and air pressure, the length of air bag pull bar 19 should be able to put pressure bladder 21
In the rear of hauling machine 20, so that tube chamber keeps air pressure when tubing passes through hauling machine 20, tubing support force is improved, improves tubing company
Stability and reliability in continuous production process.
Embodiment 3
The apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing as described in Example 1, its difference are that the device is also
Also include pinch roller support frame 15；Pinch roller support frame 15 is rotatably arranged in the sizing side wall of cooling water tank 17, and rotational plane is vertical
Direction；2 pinch rollers 13 are connected with by threaded screw rod on pinch roller support frame 15.Pinch roller support frame 15 can 360 ° of rotation tune
Section, the elastic of relevant position pinch roller 13 and regulation pinch roller position are adjusted by threaded screw rod according to the tube wall thickness deviation after shaping
Put；The pinch roller 13 is rigid plastics, and surface is smooth.
Embodiment 4
The apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, its difference are as described in Example 1, temperature adjustable water
Immersion water tank 8 is connected with external mold 4 by screw mandrel；Be provided with division board 6 between temperature adjustable water immersion water tank 8 and external mold 4, it is described every
It is polyfluortetraethylene plate from plate 6；The one end of temperature adjustable water immersion water tank 8 away from external mold 4 is provided with rubber blanket.Division board 6 is isolated
High temperature, die body is protected, while play a part of sealing and anti-leakage water.Rubber blanket is close to the outer wall of pipe 9 and blocked, to ensure water tank
It is water-tight that water level is totally submerged pipe 9.
Embodiment 5
The apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, its difference are as described in Example 1, the guiding
Post 7 and the outer surface of conical orientation mould 14 are smooth surface.
Embodiment 6
The apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, its difference are as described in Example 1, the traction
The pawl number of machine 20 is three, and the hauling machine 20 is provided with non-slip rubber block.
Embodiment 7
The apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, its difference are as described in Example 1, the sealing
Air bag 21 is rubber pneumatic bag.The wearability of rubber pneumatic bag is higher.
Embodiment 8
A kind of method of work of the apparatus for continuous formation of the biaxially orienting polyvinyl chloride tubing as described in embodiment 1-7, including
Step is as follows：
1) pipe 9 is extruded between external mold 4, core 5, is passed through sealing ring 12 through lead 7, is opened low-pressure inlet pipe 2, gas
Body passes through core 5, is exported from the low pressure stomata of the side of lead 7, the low pressure seal for surrounding pipe 9, core 5 and lead 7
Internal pressure is formed in region 10；
2) pipe 9 is cooled down through temperature adjustable water immersion water tank 8；The air pressure in low-pressure inlet pipe 2 is adjusted, makes pipe 9
Tubulose is kept outside lead 7 and produces expansion, caused internal stress in the elimination temperature-fall period of pipe 9 (i.e. pipe 9 go out external mold 4,
200 DEG C or so during core 5 drop to caused internal stress before glass transition temperature), adjust the water temperature in temperature adjustable water immersion water tank 8
For 100 DEG C, make pipe 9 from temperature adjustable water immersion water tank 8 come out when temperature (be maintained at PVC vitrifying more than 90 DEG C
More than temperature, the scope of PVC glass transition temperature is 80 DEG C -90 DEG C)；
3) traction is continued and not yet reaches the pipe 9 of glass transition temperature to carry out radially, longitudinally double orientation through conical orientation mould 14
Stretching, the pipe 9 after double orientation stretching form tubing, and tubing is carried out cold through sizing cooling water tank 17 to the tubing after stretching
But；Tubing crosses the position of pressure bladder 21, opens air bag air admission hole 3, and gas takes by core 5, lead 7, taper successively
Pressure bladder 21 is reached after to mould 14 and air bag pull bar 19, pressure bladder 21 is close to pipe material inner wall after inflating；
4) high-pressure pipe 1 is opened, gas by core 5, lead 7, conical orientation mould 14, makes conical orientation mould successively
14th, internal pressure is formed in the tubing inner region 18 that pressure bladder 21 and pipe material inner wall are formed；Air pressure in adjusting high-pressure air inlet pipe 1
Power, tubing is set to be close to calibration sleeve 16, sizing cooling water tank 17 is cooled down and shaped to tubing, tubing is reached satisfactory
Diameter simultaneously shapes below glass transition temperature.
Embodiment 9
The method of work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing as described in Example 8, its difference be,
Recirculated water is provided with the temperature adjustable water immersion water tank 8 and sizing cooling water tank 17；Cooling water tank of shaping cools down to tubing
Mode be fountain cooling.
Embodiment 10
The method of work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing as described in Example 9, its difference be,
The mode that sizing cooling water tank cools down to tubing cools down for immersion type.
Embodiment 11
The method of work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing as described in Example 8, its difference be,
Air pressure range in the high-pressure pipe 1 is 0.05~1MPa；Air pressure range in low-pressure inlet pipe 2 for 0.01~
0.1MPa；Air pressure range in air bag pull bar 19 is 0.1~1MPa.
Claims (9)
1. a kind of method of work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing, the biaxially orienting polyvinyl chloride pipe
The apparatus for continuous formation of material, including external mold, core, pipe cooling system, double orientation stretch forming system；The pipe cooling system
System includes, low-pressure inlet pipe, lead, division board, temperature adjustable water immersion water tank and sealing ring；The side wall of lead is provided with height
Calm the anger hole, the gentle capsule stomata of low pressure stomata；Low-pressure inlet pipe connects through core with low pressure stomata；Temperature adjustable water immersion water tank with
The radial section airtight connection of external mold；The double orientation stretch forming system includes, conical orientation mould, sizing cooling water tank, height
It is pressed into tracheae, hauling machine, pressure bladder and air bag pull bar；The air bag pull bar is hollow structure；Conical orientation mold cavity is set
There is high pressure stomata；High-pressure pipe connects through core with high pressure stomata；Pressure bladder connects with air bag pull bar；The core,
Lead and conical orientation mould sequentially coaxially connect；It is characterised in that it includes step is as follows：
1) pipe is extruded between external mold, core, is passed through sealing ring through lead, is opened low-pressure inlet pipe, and gas passes through core,
Exported from the low pressure stomata of lead side, make formation internal pressure in the low pressure seal region that pipe, core and lead surround；
2) pipe is cooled down through temperature adjustable water immersion water tank；The air pressure in low-pressure inlet pipe is adjusted, makes pipe in lead
Outer holding tubulose simultaneously produces expansion, eliminates caused internal stress in pipe temperature-fall period, adjusts in temperature adjustable water immersion water tank
Water temperature, make pipe from temperature adjustable water immersion water tank come out when temperature be more than 90 DEG C；
3) continue to draw the pipe for not yet reaching glass transition temperature through conical orientation mould progress radially, longitudinally double orientation stretching, it is double
Pipe after orientation stretching forms tubing, and tubing cools down through sizing cooling water tank to the tubing after stretching；Tubing is crossed
The position of pressure bladder, air bag air admission hole is opened, gas reaches pressure bladder, pressure bladder is close to pipe material inner wall after inflating；
4) high-pressure pipe is opened, in the interior formation of the tubing inner region for forming conical orientation mould, pressure bladder and pipe material inner wall
Pressure；Air pressure in adjusting high-pressure air inlet pipe, makes tubing be close to calibration sleeve, and sizing cooling water tank is cooled down and determined to tubing
Type, tubing is reached satisfactory diameter and shaped below glass transition temperature.
2. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, its feature
It is, calibration sleeve and annulus sealing gasket is provided with the sizing cooling water tank.
3. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, its feature
It is, the apparatus for continuous formation of the biaxially orienting polyvinyl chloride tubing also includes pinch roller support frame；Pinch roller support frame is rotated and set
Put in sizing cooling water tank side wall；Multiple pinch rollers are connected with by threaded screw rod on pinch roller support frame.
4. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, its feature
It is, temperature adjustable water immersion water tank is connected with external mold by screw mandrel；It is provided with and isolates between temperature adjustable water immersion water tank and external mold
Plate；The one end of temperature adjustable water immersion water tank away from external mold is provided with rubber blanket；Further, the division board is polytetrafluoroethylene (PTFE)
Plate.
5. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, its feature
It is, lead and conical orientation the mould outer surface is smooth surface.
6. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, its feature
It is, the pawl number of the hauling machine is more than or equal to three, and the hauling machine is provided with non-slip rubber block.
7. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, its feature
It is, the pressure bladder is rubber pneumatic bag.
8. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, its feature
It is, recirculated water is provided with the sizing cooling water tank；The mode that sizing cooling water tank cools down to tubing cools down for fountain
Or immersion type cooling.
9. the method for work of the apparatus for continuous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, the height
It is 0.05~1MPa to be pressed into endotracheal air pressure range；Air pressure range in low-pressure inlet pipe is 0.01~0.1MPa；Air bag is drawn
Air pressure range in bar is 0.1~1MPa.
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| CN201511003783.XA CN105599314B (en) | 2015-12-28 | 2015-12-28 | A kind of apparatus for continuous formation and method of work of biaxially orienting polyvinyl chloride tubing |
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| CN201511003783.XA CN105599314B (en) | 2015-12-28 | 2015-12-28 | A kind of apparatus for continuous formation and method of work of biaxially orienting polyvinyl chloride tubing |
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| CN105599314B true CN105599314B (en) | 2018-01-02 |
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| 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 |
| CN109366932A (en) * | 2018-09-30 | 2019-02-22 | 安徽骏泰塑业科技有限公司 | A kind of energy-saving pvc pipe production patterning process device |
| CN110341173A (en) * | 2019-08-13 | 2019-10-18 | 永高股份有限公司 | A kind of preparation method of biaxial stretch-formed PVC pipe |
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