CN105599314A - Continuous forming device of biaxial orientation polyvinyl chloride pipe and operating method - Google Patents
Continuous forming device of biaxial orientation polyvinyl chloride pipe and operating method Download PDFInfo
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- CN105599314A CN105599314A CN201511003783.XA CN201511003783A CN105599314A CN 105599314 A CN105599314 A CN 105599314A CN 201511003783 A CN201511003783 A CN 201511003783A CN 105599314 A CN105599314 A CN 105599314A
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- pipe
- pressure
- water tank
- tubing
- 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
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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
- B29C48/905—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention relates to a continuous forming device of a biaxial orientation polyvinyl chloride pipe and an operating method. The continuous forming device of the biaxial orientation polyvinyl chloride pipe comprises an outer mold, a core mold, a pipe blank cooling system and a double orientation stretch forming system; the pipe blank cooling system comprises a low pressure air inlet pipe, a guide post, a separator, a temperature-adjustable water immersion type tank and a seal ring; the double orientation stretch forming system comprises a tapered orientation mold, a sizing cooling tank, a high pressure air inlet pipe, a tractor, a seal airbag and an airbag pull rod. By adopting the continuous forming device of the biaxial orientation polyvinyl chloride pipe, an extruded pipe blank not reaching vitrification temperature is cooled evenly, and the inner stress of the pipe blank is removed; the support of the pipe to the tractor is increased, the traction balance is ensured, and thus the stableness and reliability of continuous production of the pipe is ensured.
Description
Technical field
The apparatus for continous formation and the method for work that the present invention relates to a kind of biaxially orienting polyvinyl chloride tubing, belong to plastic tube extrusionThe technical field of shaping jig.
Background technology
Along with the lifting to environmental problem attention rate, there is saving material in people, reduce energy consumption and reduce the requirements such as carbon emission amount,The coming years, PVC-O pipe will become the pipe-line system solution that meets these requirements, in particular for supplying water, and drinking water and uselessThe fields such as water. PVC-O has obvious advantage with respect to non-polymer tubing, and not only carbon emission amount is far below picture ductile iron pipe, also there is not etching problem in such traditional product. In addition, up-to-date information shows, PVC-O tubing is in the installation of feedwater pipingOn be even better than polyolefin (PO) class pipeline, as PE100 pipeline.
The molecule biaxial orientation of PVC-U tubing is generally realized by different approach:
A kind of mode is two-step method off-line processing technology, first under forming temperature, and extrusion molding PVC-U pipe, then specificUnder condition, pipe is carried out to hoop and axial orientation.
Another kind of mode is one-step method on-line machining technique, tube forming process simultaneously after biaxial orientation tubing by cold rapidlyBut to room temperature. This tubing being oriented is stable in the following structure of glass transition temperature (75 DEG C of ≈). This temperature withUpper material is rubbery state, and after temperature raises, tubing can be retracted to original dimension.
After pipe material molecularly oriented, present layer structure. This structure can be resisted drawing of nibs in material and tube surfacesThe brittle break that trace produces. Therefore, PVC-O has higher notch shock performance, also there is no the crackle risk of diffusion rapidly,After tubing orientation, circumferential force and the impact resistance of material are improved.
Early, Processes and apparatus is simple for two-step method processed and applied, but production efficiency is low, consumes the energy and human cost. And orderThe front one-step method relative productivity that starts application improves greatly, and required manpower, energy resource consumption are lower, but apparatus and process is more multipleAssorted, pipe chilling temperature and pipe are bad because of the internal stress control that chilling produces, and cross hauling machine because propping up after tube forming because tube wall is thinThe little traction of support force is skidded, cause pipe biaxial tension after-drawing than control and wall thickness debugging more difficult, affect PVC-O tubingWhole serviceability.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of apparatus for continous formation of biaxially orienting polyvinyl chloride tubing.
The present invention also provides a kind of method of work of apparatus for continous formation of above-mentioned biaxially orienting polyvinyl chloride tubing.
Technical scheme of the present invention is as follows:
An apparatus for continous formation for biaxially orienting polyvinyl chloride tubing, comprises external mold, core, pipe cooling system, double orientationStretch forming system; Described pipe cooling system comprises, low-pressure inlet pipe, lead, division board, temp. controllable water logging formula water tankAnd sealing ring; The sidewall of lead is provided with high pressure pore, the gentle capsule pore of low pressure pore; Low-pressure inlet pipe is through core and lowCalm the anger hole be communicated with; The airtight connection of radial section of temp. controllable water logging formula water tank and external mold. Pipe is laggard from extruding between external mold and coreEnter temp. controllable water logging formula water tank, the water in temp. controllable water logging formula water tank contacts and carries out cooling to pipe with pipe;
Described double orientation stretch forming system comprises, conical orientation mould, sizing cooling water tank, high-pressure pipe, hauling machine, closeEnvelope air bag and air bag pull bar; Described air bag pull bar is hollow structure; Conical orientation mold cavity is provided with high pressure pore; High pressure admissionPipe is communicated with high pressure pore through core; Pressure bladder is communicated with air bag pull bar;
Described core, lead and conical orientation mould are coaxially connected successively; The effect of lead is that pipe is led and connectedConical orientation mould below; The outside tapering part of conical orientation mould carries out double orientation guiding to the pipe that does not reach vitrification pointStretch.
Low-pressure inlet pipe makes pipe in the time being cooled to before vitrification point, keep tubulose form and make pipe micro-swollen, eliminates chilling stress.High-pressure pipe regulates tube outer diameter and improves tubing and is pulled tubing support force while compression; Close by air bag air admission hole air inlet adjustmentEnvelope gasbag pressure, makes pressure bladder keep a pressure, and pressure bladder outer wall is close to the pipe material inner wall after moulding.
Preferably, the two ends, left and right of described sizing cooling water tank are respectively arranged with calibration sleeve and annulus sealing gasket. Calibration sleeve and annulusSealing gasket and outer pipe wall are adjacent to sealing and play sealing function.
Pressure bladder is stretched and transmission and air pressure by air bag pull bar, and air bag pull bar length should be able to make pressure bladder be placed in hauling machine rear,So that tubing tube chamber when the hauling machine keeps air pressure, improve tubing support force, improve stable in tubing continuous flow procedureProperty and reliability.
Preferably, the apparatus for continous formation of described biaxially orienting polyvinyl chloride tubing also comprises pinch roller bracing frame; Pinch roller bracing frame turnsMoving being arranged on sizing cooling water tank sidewall, rotational plane is vertical direction; On pinch roller bracing frame, connect setting by threaded screw rodThere are multiple pinch rollers. Pinch roller bracing frame can regulate in 360 ° of rotations, regulates by threaded screw rod according to the tube wall thickness deviation after being shapedThe degree of tightness of relevant position pinch roller and adjusting puck position; Described pinch roller is rigid plastics, and smooth surface is smooth.
Preferably, temp. controllable water logging formula water tank is connected by screw mandrel with external mold; Between temp. controllable water logging formula water tank and external mold, be provided withDivision board; Temp. controllable water logging formula water tank is provided with rubber blanket away from one end of external mold. Division board isolation high temperature, protection die body, withTime play the effect of sealed against leakage water. Further preferred, described division board is polyfluortetraethylene plate. Rubber blanket is close to outside pipeWall carries out shutoff, water-tight to ensure the complete submergence pipe of cistern water level.
Preferably, described lead and conical orientation mould outer surface are smooth surface.
Preferably, the pawl number of described hauling machine is more than or equal to three, and described hauling machine is provided with non-slip rubber block.
Preferably, described pressure bladder is rubber pneumatic bag. The wearability of rubber pneumatic bag is higher.
A method of work for the apparatus for continous formation of above-mentioned biaxially orienting polyvinyl chloride tubing, comprises that step is as follows:
1) pipe is extruded between external mold, core, through sealing ring, opens low-pressure inlet pipe through lead, and gas passes core,Derive from the low pressure pore of lead side, in forming in the low pressure seal region that pipe, core and lead are surrounded, press;
2) pipe carries out cooling through temp. controllable water logging formula water tank; Regulate the air pressure in low-pressure inlet pipe, make pipe outside leadKeep tubulose and produce expanding, eliminating the internal stress that produces in pipe temperature-fall period (is pipe when going out external mold, core 200DEG C left and right drops to the internal stress producing before vitrification point), regulate the water temperature in temp. controllable water logging formula water tank, make pipe from adjustableThe temperature of temperature immersion type water tank out time be greater than 90 DEG C (more than remaining on pvc pipe material vitrification point, pvc pipe material glassThe scope of changing temperature is 80 DEG C-90 DEG C);
3) continue pipe that traction not yet reaches vitrification point through conical orientation mould carry out radially, longitudinally double orientation stretches, two gettingPipe after stretching forms tubing, and tubing, through sizing cooling water tank, carries out cooling to the tubing after stretching; Tubing is crossed closeThe position of envelope air bag, opens air bag air admission hole, and gas arrives successively after core, lead, conical orientation mould and air bag pull barReach pressure bladder, make to be close to pipe material inner wall after pressure bladder inflation;
4) open high-pressure pipe, gas passes through core, lead successively from conical orientation mould, makes conical orientation mould, blanket gasIn forming in the tubing inner region that capsule and pipe material inner wall form, press; Air pressure in adjusting high-pressure air inlet pipe, is close to tubing fixedFootpath cover, sizing cooling water tank carries out cooling and sizing to tubing, make tubing reach satisfactory diameter and vitrification point withLower setting.
Preferably, in described pipe cooling water tank and in sizing cooling water tank, be provided with recirculated water; Sizing cooling water tank is to tubingCooling mode is that fountain is cooling or immersion type is cooling.
Preferably, the air pressure range in described high-pressure pipe is 0.05～1MPa; Air pressure range in low-pressure inlet pipe is 0.01～0.1MPa; Air pressure range in air bag pull bar is 0.1～1MPa.
The usefulness of this invention is:
1, the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing of the present invention, makes to reach after extruding the pipe before vitrification pointBase is cooling evenly and eliminate pipe internal stress; And tubing is strengthened the supportive of hauling machine, ensure the balance of traction, therebyEnsure that tubing quantity-produced is reliable and stable;
2, the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing of the present invention, by the temp. controllable water logging formula water of controlling water temperatureCase carries out evenly cooling to tubing, and is connected with high and low pressure air inlet pipe at pipe core rod, is regulated and is eliminated pipe by low-pressure inlet pipeChilling stress-retained, is made tubing reach suitable external diameter and tubing is kept in internal pressure and hauling machine form by high-pressure pipeExternal pressure balance, draws and skids in avoiding producing, and ensures tubing quantity-produced stability;
3, the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing of the present invention, simple in structure, and practicality is high, maintenance costLow.
Brief description of the drawings
Fig. 1 is the schematic cross-section of the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing of the present invention;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Wherein, 1, high-pressure pipe; 2, low-pressure inlet pipe; 3, air bag air admission hole; 4, external mold; 5, core; 6, isolationPlate; 7, lead; 8, temp. controllable water logging formula water tank; 9, pipe; 10, low pressure seal region; 11, screw mandrel; 12, sealingCircle; 13, pinch roller; 14, conical orientation mould; 15, pinch roller bracing frame; 16, calibration sleeve; 17, sizing cooling water tank; 18,Tubing inner region; 19, air bag pull bar; 20, hauling machine; 21, pressure bladder; 22, shaping pipe.
Detailed description of the invention
Below in conjunction with embodiment and Figure of description, the present invention is described in detail, but is not limited to this.
Embodiment 1
As shown in Figure 1-2.
An apparatus for continous formation for biaxially orienting polyvinyl chloride tubing, comprises external mold 4, core 5, pipe 9 cooling systems, twoOrientation stretching formation system; Described pipe 9 cooling systems comprise, low-pressure inlet pipe 2, lead 7, division board 6, temp. controllableImmersion type water tank 8 and sealing ring 12; The sidewall of lead 7 is provided with high pressure pore, the gentle capsule pore of low pressure pore; Low compressing intoTracheae 2 is communicated with low pressure pore through core 5; The airtight connection of radial section of temp. controllable water logging formula water tank 8 and external mold 4. PipeBase 9 enters temperature adjustable water extruding between external mold 4 and core 5 and soaks formula water tank 8, water and pipe in temp. controllable water logging formula water tank 8Base 9 contacts and carries out cooling to pipe 9;
Described double orientation stretch forming system comprises, conical orientation mould 14, sizing cooling water tank 17, high-pressure pipe 1, tractionMachine 20, pressure bladder 21 and air bag pull bar 19; Described air bag pull bar 19 is hollow structure; The 14 inner chamber settings of conical orientation mouldThere is high pressure pore; High-pressure pipe 1 is communicated with high pressure pore through core 5; Pressure bladder 21 is communicated with air bag pull bar 19;
Described core 5, lead 7 and conical orientation mould 14 are coaxially connected successively; The effect of lead 7 is that pipe 9 is carried outLead and connect conical orientation mould 14 below; The outside tapering part of conical orientation mould 14 is not to reaching the pipe of vitrification pointBase 9 carries out double orientation guiding and stretches.
Low-pressure inlet pipe 2 makes pipe 9 in the time being cooled to before vitrification point, keep tubulose form and make pipe 9 micro-swollen, eliminates anxiousCold stress. High-pressure pipe 1 regulates tube outer diameter and improves tubing and is pulled tubing support force while compression; By air bag air admission hole3 air inlet adjustment pressure bladder 21 pressure, make pressure bladder 21 keep a pressure, and pressure bladder 21 outer walls are close to after mouldingPipe material inner wall.
Embodiment 2
The apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 1, its difference is, described sizing is coolingThe two ends, left and right of water tank 17 are respectively arranged with calibration sleeve 16 and annulus sealing gasket. Calibration sleeve 16 and annulus sealing gasket and outer pipe wallBe adjacent to sealing and play sealing function.
Pressure bladder 21 is stretched and transmission and air pressure by air bag pull bar 19, and air bag pull bar 19 length should be able to make pressure bladder 21 be placed inHauling machine 20 rears, so that tubing tube chamber when the hauling machine 20 keeps air pressure, improve tubing support force, have improved tubing and have connectedStability and reliability in continuous production process.
Embodiment 3
The apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 1, its difference is, this device also wrapsDraw together pinch roller bracing frame 15; Pinch roller bracing frame 15 rotates and is arranged on sizing cooling water tank 17 sidewalls, and rotational plane is vertical direction;On pinch roller bracing frame 15, be connected with 2 pinch rollers 13 by threaded screw rod. Pinch roller bracing frame 15 can regulate in 360 ° of rotations,Regulate the degree of tightness of relevant position pinch roller 13 and regulate puck position by threaded screw rod according to the tube wall thickness deviation after being shaped; DescribedPinch roller 13 is rigid plastics, and smooth surface is smooth.
Embodiment 4
The apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 1, its difference is, temp. controllable water logging formulaWater tank 8 is connected by screw mandrel with external mold 4; Between temp. controllable water logging formula water tank 8 and external mold 4, be provided with division board 6, described everyBe polyfluortetraethylene plate from plate 6; Temp. controllable water logging formula water tank 8 is provided with rubber blanket away from one end of external mold 4. Division board 6 everyFrom high temperature, protection die body plays the effect of sealed against leakage water simultaneously. Rubber blanket is close to pipe 9 outer walls and is carried out shutoff, to ensureThe complete submergence pipe 9 of cistern water level is water-tight.
Embodiment 5
The apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 1, its difference is, described lead 7With conical orientation mould 14 outer surfaces be smooth surface.
Embodiment 6
The apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 1, its difference is, described hauling machine 20Pawl number be three, described hauling machine 20 is provided with non-slip rubber block.
Embodiment 7
The apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 1, its difference is, described pressure bladder21 is rubber pneumatic bag. The wearability of rubber pneumatic bag is higher.
Embodiment 8
A method of work for the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in embodiment 1-7, comprise step asUnder:
1) pipe 9 is extruded between external mold 4, core 5, through sealing ring 12, opens low-pressure inlet pipe 2 through lead 7,Gas, through core 5, is derived the low pressure that pipe 9, core 5 and lead 7 are surrounded from the low pressure pore of lead 7 sidesIn the interior formation of sealing area 10, press;
2) pipe 9 carries out cooling through temp. controllable water logging formula water tank 8; Regulate the air pressure in low-pressure inlet pipe 2, pipe 9 is existedThe outer maintenance tubulose of lead 7 also produces expansion, and eliminating the internal stress producing in pipe 9 temperature-fall periods (is that pipe 9 is from going out external mold4,200 DEG C of left and right when core 5 drop to the internal stress producing before vitrification point), regulate in temp. controllable water logging formula water tank 8Water temperature is 100 DEG C, and the temperature out time is greater than 90 DEG C and (remains on pvc pipe material from temp. controllable water logging formula water tank 8 to make pipe 9More than vitrification point, the scope of pvc pipe material vitrification point is 80 DEG C-90 DEG C);
3) continue pipe 9 that traction not yet reaches vitrification point through conical orientation mould 14 carry out radially, longitudinally double orientation stretches,Pipe 9 after double orientation stretches forms tubing, and tubing, through sizing cooling water tank 17, carries out cooling to the tubing after stretching; PipeMaterial is crossed the position of pressure bladder 21, opens air bag air admission hole 3, and gas passes through core 5, lead 7, conical orientation successivelyThe rear arrival pressure bladder 21 of mould 14 and air bag pull bar 19, makes to be close to pipe material inner wall after pressure bladder 21 inflations;
4) open high-pressure pipe 1, gas passes through core 5, lead 7 successively from conical orientation mould 14, makes conical orientation mould14, in the interior formation of tubing inner region 18 that pressure bladder 21 and pipe material inner wall form, press; Air in adjusting high-pressure air inlet pipe 1Pressure, makes tubing be close to calibration sleeve 16, and sizing cooling water tank 17 carries out cooling and sizing to tubing, tubing is reached meet to wantThe diameter of asking also formalizes below vitrification point.
Embodiment 9
The method of work of the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 8, its difference is, described inIn temp. controllable water logging formula water tank 8 and sizing cooling water tank 17, be provided with recirculated water; The sizing cooling water tank mode cooling to tubingFor fountain cooling.
Embodiment 10
The method of work of the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 9, its difference is, sizingCooling water tank is that immersion type is cooling to the cooling mode of tubing.
Embodiment 11
The method of work of the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing as described in Example 8, its difference is, described inAir pressure range in high-pressure pipe 1 is 0.05～1MPa; Air pressure range in low-pressure inlet pipe 2 is 0.01～0.1MPa; GasAir pressure range in capsule pull bar 19 is 0.1～1MPa.
Claims (10)
1. an apparatus for continous formation for biaxially orienting polyvinyl chloride tubing, is characterized in that, comprises that external mold, core, pipe are coldBut system, double orientation stretch forming system; Described pipe cooling system comprises, low-pressure inlet pipe, lead, division board, canTemperature adjustment immersion type water tank and sealing ring; The sidewall of lead is provided with high pressure pore, the gentle capsule pore of low pressure pore; Low-pressure admissionPipe is communicated with low pressure pore through core; The airtight connection of radial section of temp. controllable water logging formula water tank and external mold; Described double orientation drawsStretch formation system and comprise, conical orientation mould, sizing cooling water tank, high-pressure pipe, hauling machine, pressure bladder and air bag pull bar;Described air bag pull bar is hollow structure; Conical orientation mold cavity is provided with high pressure pore; High-pressure pipe is through core and high pressure gasHole is communicated with; Pressure bladder is communicated with air bag pull bar; Described core, lead and conical orientation mould are coaxially connected successively.
2. the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, is characterized in that, described fixedThe two ends, left and right of type cooling water tank are respectively arranged with calibration sleeve and annulus sealing gasket.
3. the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, is characterized in that, described twoThe apparatus for continous formation of axle orientation polychloroethylene pipes also comprises pinch roller bracing frame; Pinch roller bracing frame rotates and is arranged on sizing cooling waterOn case sidewall; On pinch roller bracing frame, be connected with multiple pinch rollers by threaded screw rod.
4. the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, is characterized in that, temp. controllableImmersion type water tank is connected by screw mandrel with external mold; Between temp. controllable water logging formula water tank and external mold, be provided with division board; Temp. controllable water loggingFormula water tank is provided with rubber blanket away from one end of external mold; Further preferred, described division board is polyfluortetraethylene plate.
5. the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, is characterized in that, described in leadBe smooth surface to post and conical orientation mould outer surface.
6. the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, is characterized in that, described in leadThe pawl number that draws machine is more than or equal to three, and described hauling machine is provided with non-slip rubber block.
7. the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 1, is characterized in that, described closeEnvelope air bag is rubber pneumatic bag.
8. a method of work for the apparatus for continous formation of the biaxially orienting polyvinyl chloride tubing as described in claim 1-7, its spyLevy and be, comprise that step is as follows:
1) pipe is extruded between external mold, core, through sealing ring, opens low-pressure inlet pipe through lead, and gas passes core,Derive from the low pressure pore of lead side, in forming in the low pressure seal region that pipe, core and lead are surrounded, press;
2) pipe carries out cooling through temp. controllable water logging formula water tank; Regulate the air pressure in low-pressure inlet pipe, make pipe outside leadKeep tubulose and produce expanding, eliminate the internal stress producing in pipe temperature-fall period, regulate the water temperature in temp. controllable water logging formula water tank,The temperature out time is greater than 90 DEG C from temp. controllable water logging formula water tank to make pipe;
3) continue pipe that traction not yet reaches vitrification point through conical orientation mould carry out radially, longitudinally double orientation stretches, two gettingPipe after stretching forms tubing, and tubing, through sizing cooling water tank, carries out cooling to the tubing after stretching; Tubing is crossed closeThe position of envelope air bag, opens air bag air admission hole, and gas arrives pressure bladder, makes to be close to pipe material inner wall after pressure bladder inflation;
4) open high-pressure pipe, in forming in the tubing inner region that conical orientation mould, pressure bladder and pipe material inner wall are formed, press;Air pressure in adjusting high-pressure air inlet pipe, makes tubing be close to calibration sleeve, and sizing cooling water tank carries out cooling and sizing to tubing,Make tubing reach satisfactory diameter and formalize below vitrification point.
9. the method for work of the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 8, its feature existsIn, in described pipe cooling water tank and in sizing cooling water tank, be provided with recirculated water; The sizing cooling water tank side cooling to tubingFormula is that fountain is cooling or immersion type is cooling.
10. the method for work of the apparatus for continous formation of biaxially orienting polyvinyl chloride tubing according to claim 8, described heightCompressing into endotracheal air pressure range is 0.05～1MPa; Air pressure range in low-pressure inlet pipe is 0.01～0.1MPa; Air bag pull barInterior air pressure range 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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| 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 |
| 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 |
| CN115027044A (en) * | 2022-06-21 | 2022-09-09 | 临海伟星新型建材有限公司 | Bidirectional stretching orientation enhancing device and method for pipe |
| CN117863504A (en) * | 2024-03-12 | 2024-04-12 | 四川鸿宇恒创塑料制品有限责任公司 | Polyvinyl chloride pipe injection molding device and injection molding method |
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