CN107443716A - Produce PVC O, BOPVC, biaxial tension PVC dilatation mold, production line and method - Google Patents
Produce PVC O, BOPVC, biaxial tension PVC dilatation mold, production line and method Download PDFInfo
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- CN107443716A CN107443716A CN201710689305.1A CN201710689305A CN107443716A CN 107443716 A CN107443716 A CN 107443716A CN 201710689305 A CN201710689305 A CN 201710689305A CN 107443716 A CN107443716 A CN 107443716A
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- sizing section
- pvc
- pressure rating
- outside dimension
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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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
- B29C55/24—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes radial
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
One kind production PVC O, BOPVC, biaxial tension PVC dilatation mold, including：Guide section；Caliber expansion elements, caliber expansion elements are cone structure, and the miner diameter end of caliber expansion elements is connected with guide section, and first through hole is offered in the surface of caliber expansion elements；Sizing section, sizing section are arranged at the rear end of caliber expansion elements, in offering the second through hole on sizing section.Expansion elements can form stair-stepping caliber expansion structure, and it can improve the product quality after the expansion of PVC O calibers, can greatly reduce the operation difficulty of tubing biaxial tension.Some through holes are provided with expansion elements and sizing section, the retraction force for offsetting tubing itself outwards can be used for by output pressure by the through hole on dilatation mold, realize that slight drag state of the blank tubing on mould passes through, resistance problem of the invention greatly between solution blank tubing and mould is so enabled to, so as to greatly reduce the biaxial tension operation difficulty of PVC.
Description
Technical field
The present invention relates to PVC biaxial tension equipment technical field, more specifically, more particularly to a kind of production PVC-
O, BOPVC, biaxial tension PVC produce PVC-O, BOPVC, biaxial tension PVC production line with dilatation mold, one kind
And a kind of produce PVC-O, BOPVC, the method for biaxial tension PVC.
Background technology
PVC-O tubing (BIAXIAL ORENTED PVC PIPE) is also referred to as biaxial tension PVC.Because of its remarkable pressure-bearing
Performance, economy and security are used widely in fields such as the urban water supplies of developed country.It is traditional PVC-U tubing, PE
The substitute in feedwater field such as tubing, spheroidal graphite cast-iron tubing.Britain, France, Holland, Portugal, the U.S., Australia, south
For many years, economic benefit and social benefit are notable for the application of non-sum Japan and other countries.But due to the difficulty in manufacturing process, external skill
Art maintain secrecy and introduce technology it is with high costs, China so far also without on orientation polyvinyl chloride (PVC-O) pipe of merchandized handling
City.
The advantage of PVC-O tubing is the molecule arranging structure for by the biaxial tension to material, changing material, makes material
Linear structure of the molecule of material from before stretching is changed into the network structure after stretching, substantially increases the tensile strength of material so that
PVC-O tubing improves by about one time than the pressure-resistant performance of traditional PVC-U tubing, i.e., under the situation same using pressure, PVC-O pipes
Material connects by about one time than the meter Chong little of traditional PVC.
The content of the invention
(1) technical problem
Therefore, in production process, when draw-gear pulls PVC-O tubing to move backward, the inwall of tubing how is reduced
Frictional force between the lateral surface of dilatation mold, become those skilled in the art's urgent problem to be solved.
(2) technical scheme
The invention provides one kind production PVC-O, BOPVC, biaxial tension PVC dilatation mold, for production
The axially and radially stretching of blank tubing used in PVC-O, BOPVC, biaxial tension PVC, including：
Guide section, the cross section of the guide section is circular configuration；
The caliber expansion elements being arranged on rear side of the guide section, the caliber expansion elements are cone structure, the pipe
The miner diameter end of footpath expansion elements is connected with the guide section, and first through hole is offered in the surface of the caliber expansion elements；
Sizing section, the sizing section are arranged at the rear end of the caliber expansion elements, in offering on the sizing section
Two through holes.
Preferably, in being provided with independent guide section closed chamber on the guide section, in the caliber expansion elements
Independent expansion elements closed chamber is provided with, in being provided with independent sizing section closed chamber on the sizing section；Described
One through hole connects with the expansion elements closed chamber.
Preferably, the caliber expansion elements are provided with multiple, and whole caliber expansion elements are coaxially arranged in a straight line
Set, the cross-sectional diameter between adjacent two caliber expansion elements is incremented by successively and formed with step structure
Expansion segment；One end of the expansion segment is connected with the sealing ring, and the other end of the expansion segment is connected with the sizing section.
Preferably, changeover portion is provided between the expansion segment and the sizing section, the changeover portion is cone structure,
The miner diameter end closing of the changeover portion, the bigger diameter end of the changeover portion are open hatch frame, the bigger diameter end of the changeover portion
Connected with the sizing section.
Preferably, the sizing section is provided with multiple separate sizing segment units, and each sizing segment unit is equal
It is provided with the sizing section closed chamber of a closing；The changeover portion is connected with first sizing segment unit.
Preferably, the sealing ring being arranged on rear side of the guide section, the sealing ring relative to the guide section outside
Face out protrusion.
Preferably, in offering the balancing slit parallel with its lateral surface bus on the lateral surface of the caliber expansion elements,
The first through hole is opened in the bottom land of the balancing slit.
Preferably, the caliber expansion elements include nose cone portion and are arranged on rear side of the nose cone portion
Seal section, the nose cone portion are cone structure.
Preferably, the back segment lateral surface in the nose cone portion is plane or arcwall face；The lateral surface of the seal section is
Plane, concave surface and or convex surface.
Preferably, the guide section is the guide section of solid construction, and the caliber expansion elements are the caliber of solid construction
Expansion elements, the sizing section are the sizing section of solid construction.
Preferably, the sizing section carries out sizing to blank tubing, and the sizing section is straight pipe type structure, the sizing section
Relation between the outside dimension of production tube is：
During a diameter of 110mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section
For 105-107mm, pressure rating 1.6MPa, the outside dimension scope of the sizing section is 104-105.4mm, and pressure rating is
2.0MPa, the outside dimension scope of the sizing section is 103-104mm；
During a diameter of 125mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section
For 120-121mm, pressure rating 1.6MPa, the outside dimension scope of the sizing section is 118-119mm, and pressure rating is
2.0MPa, the outside dimension scope of the sizing section is 116-117mm；
During a diameter of 160mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 155-157mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 154-155mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 152-153mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 151-152mm；
During a diameter of 200mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 194-196-197mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 193-194mm, pressure rating
For 1.6MPa, the outside dimension scope of the sizing section is 190-191mm, pressure rating 2.0MPa, the sizing section it is outer
Footpath size range is 187-189mm；
During a diameter of 225mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section
For 217-218mm, pressure rating 1.25MPa, the outside dimension scope of the sizing section is 216-217mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 214-215mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 211-212mm；
During a diameter of 250mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 243-245mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 241-243mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 238-239mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 235-236mm；
During a diameter of 315mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 311-313mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 304-305mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 300-301mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 296-297mm；
During a diameter of 355mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 346-347mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 342-344mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 338-339mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 333-335mm；
During a diameter of 400mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 390-391mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 386-388mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 381-382mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 376-377mm；
During a diameter of 450mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 439-440mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 436-437mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 429-430mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 422-424mm；
During a diameter of 500mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 488-489mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 484-485mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 475-477mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 470-471mm；
During a diameter of 630mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 613-614mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 608-609mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section is 598-600mm.
Present invention also offers one kind production PVC-O, BOPVC, biaxial tension PVC production line, include and be used for
The heater heated to tubing and the cooling and shaping device for carrying out cooling and shaping to tubing.Based on said structure
Design, present invention additionally comprises have production PVC-O, BOPVC, biaxial tension PVC dilatation mold described above；
The production PVC-O, BOPVC, biaxial tension PVC are arranged at the heater and institute with dilatation mold
State between cooling and shaping device.
Present invention also offers it is a kind of produce PVC-O, BOPVC, biaxial tension PVC method, in the method,
The present invention using production PVC-O, BOPVC described above, biaxial tension PVC dilatation mold to the common PVC after heating-
U tubing is used to producing PVC-O, BOPVC, the blank tubing used in biaxial tension PVC is axially and radially stretched, from
And blank tubing inside points subchain is caused to reticulate structure.
(3) beneficial effect
By said structure design, in the present invention, this is used to produce PVC-O, BOPVC, the expansion of biaxial tension PVC
Opening mould mainly includes guide section, expansion elements and sizing section.Wherein, expansion elements can form stair-stepping caliber expansion
Structure, it can improve the product quality after the expansion of tubing caliber, and can largely reduce behaviour when stretching tubing
Make difficulty.In addition, be provided with through hole in expansion elements and sizing section, when tubing climb it is expanding during, through hole energy
Air-flow, water or other liquid are enough sprayed, make to form barrier film between the inwall of tubing and expansion elements, greatly reduce tubing in mould
Running resistance on tool so that blank pipe can completely be stretched through whole dilatation mold by hauling machine, so be enabled to
The present invention thoroughly solves the problems, such as that frictional force is larger and stretches difficult between tubing and mould.
Brief description of the drawings
Fig. 1 is that production PVC-O, BOPVC, the structure of biaxial tension PVC dilatation mold are shown in the embodiment of the present invention
It is intended to；
In Fig. 1, the corresponding relation of component names and accompanying drawing number is：
Guide section 1, caliber expansion elements 2, first through hole 3, sizing section 4, the second through hole 5, sealing ring 6.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
Illustrate the present invention, but can not be used for limiting the scope of the present invention.
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more；Term " on ",
" under ", "left", "right", " interior ", " outer ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. be only used for describe purpose, and it is not intended that instruction or
Imply relative importance.
In the description of the invention, it is necessary to which explanation, unless otherwise clearly defined and limited, term " connected ", " connects
Connect " it should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or it is integrally connected；It can be machine
Tool connects or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary.For this area
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Fig. 1 is refer to, Fig. 1 is that PVC-O, BOPVC, biaxial tension PVC extension module are produced in the embodiment of the present invention
The structural representation of tool.
The invention provides one kind production PVC-O, BOPVC, biaxial tension PVC dilatation mold, for production
The axially and radially stretching of blank tubing used in PVC-O, BOPVC, biaxial tension PVC.
In an embodiment of the invention, the dilatation mold includes：
1st, guide section, the cross section of guide section 1 is circular configuration, and guide section 1 is designed using round tube shape structure, and its outside is
Even surface structure.
2nd, the caliber expansion elements 2 of the rear side of guide section 1 are arranged at, according to technique productions order, caliber expansion elements 2 are set
In the rear side of guide section 1.Base pipe carries out traction guiding by guide section 1, enters afterwards in caliber expansion elements 2, in blank pipe
It is heated to realize radial direction and axial biaxial tension by caliber expansion elements 2 after elastomeric state.
Specifically, caliber expansion elements 2 are cone structure, and one end of caliber expansion elements 2 is miner diameter end, and its other end is
Bigger diameter end, this makes it possible to base pipe is gradually expanded.The miner diameter end of caliber expansion elements 2 is connected with guide section 1, is expanded in caliber
The surface of unit 2 offers first through hole 3.Ventilated by first through hole 3, water flowing or be passed through other liquid, gas, water or other liquid
Body can form a barrier film between base pipe and caliber expansion elements 2, can so effectively reduce base pipe and caliber expansion is single
The movement and shaping of frictional force, more conducively base pipe between member 2.
3rd, sizing section, sizing section 4 are arranged at the rear end of caliber expansion elements 2, in offering the second through hole 5 on sizing section 4.
Sizing section 4 carries out the determination of physical dimension according to the design requirement of finished product, and the second through hole 5 is opened up on sizing section 4, is led to by second
The outlet of hole 5, water outlet or the other liquid of output, enable to form a barrier film between the lateral surface of base pipe and sizing section 4, should be every
Film can reduce the frictional force between sizing section 4 and pipe material inner wall, be easy to the continuous motion of tubing.
Under actual job state, pushed ahead after the heating of base pipe by guide section 1 to caliber expansion elements 2, caliber
The diameter of expansion elements 2 is more than the diameter of guide section 1, because the heating of base pipe is in elastomeric state, therefore continues to push ahead, base pipe
It can just be expanded in the presence of caliber expansion elements 2.
Exported for the ease of air-flow, water or other liquid from the through hole 5 of first through hole 3 and second, the present invention is to being oriented to
Section 1, caliber expansion elements 2 and sizing section 4 have carried out structure optimization：Closed in being provided with independent guide section on guide section 1
Chamber, in being provided with independent expansion elements closed chamber in caliber expansion elements 2, independent determine in being provided with sizing section 4
Footpath section closed chamber；First through hole 3 connects with expansion elements closed chamber.
Independent chamber is set in each " section " structure, the pressure source that each chamber can be independent as one
Voltage supply (compressed air, water or other liquid are pressurising medium), can so high-precision control be carried out to the processing technology of base pipe.
In said structure design, base pipe is heated be in elastomeric state, also, it is stretched after base pipe also there is heat to bounce back
Characteristic.Expand its in caliber expansion elements 2 " climbing " heating of base pipe, elastomeric state can allow base pipe to carry out deformation, base
The hot contraction performance of pipe can be such that base pipe is tightly wrapped on dilatation mold, so as to realize the closing of pressurising medium, ensure above-mentioned
Barrier film can be formed smoothly.
In the present invention, caliber expansion elements 2 are provided with multiple, and whole caliber expansion elements 2 are coaxially arranged in a straight line to be set
Put, the cross-sectional diameter between adjacent two caliber expansion elements 2 is incremented by successively and expansion formed with step structure
Section；One end of expansion segment is connected with sealing ring 6, and the other end of expansion segment is connected with sizing section 4.
Based on above-mentioned improvement, in the present invention, expansion segment has following three kinds of structure type：1st, cone is multi-ladder knot
Structure；2nd, cone is single hierarchic structure；3rd, single cone structure.
In yet another embodiment of the present invention, the guide section is the guide section of solid construction, the caliber expansion
Unit is the caliber expansion elements of solid construction, and the sizing section is the sizing section of solid construction.
As shown in the above, the expansion of base pipe can regard the small step composition of multiple identicals as, expand in each caliber
An independent expansion operation is all carried out on Zhang Danyuan 2, then, in order to ensure that each small step septation is smoothly formed, this
Invention extends from the miner diameter end of caliber expansion elements 2 to its bigger diameter end direction, and close to the side of miner diameter end, it is cone structure, is leaned on
The side of nearly bigger diameter end is seal section, and seal section is flat construction or is micro-arc structure (concave arc either outer convex arc
Shape).Seal section is act as：When base pipe continues " climbing " shaping after the seal section, the pyrocondensation of base pipe can be wrapped up only
On seal section, by seal section pressurising medium can be avoided to play base tube top, ensure the smooth formation of barrier film.
Specifically, changeover portion, transition are provided between expansion segment and sizing section 4 based on said structure design, the present invention
Section be cone structure, and the miner diameter end of changeover portion is closed, and the bigger diameter end of changeover portion is open hatch frame, the bigger diameter end of changeover portion
Connected with sizing section 4.
In the present invention, the sizing section carries out sizing to blank tubing, and the sizing section is straight pipe type structure, described fixed
Relation between footpath section and the outside dimension of production tube is：
During a diameter of 110mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section
For 105-107mm, pressure rating 1.6MPa, the outside dimension scope of the sizing section is 104-105.4mm, and pressure rating is
2.0MPa, the outside dimension scope of the sizing section is 103-104mm；
During a diameter of 125mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section
For 120-121mm, pressure rating 1.6MPa, the outside dimension scope of the sizing section is 118-119mm, and pressure rating is
2.0MPa, the outside dimension scope of the sizing section is 116-117mm；
During a diameter of 160mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 155-157mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 154-155mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 152-153mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 151-152mm；
During a diameter of 200mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 194-196-197mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 193-194mm, pressure rating
For 1.6MPa, the outside dimension scope of the sizing section is 190-191mm, pressure rating 2.0MPa, the sizing section it is outer
Footpath size range is 187-189mm；
During a diameter of 225mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section
For 217-218mm, pressure rating 1.25MPa, the outside dimension scope of the sizing section is 216-217mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 214-215mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 211-212mm；
During a diameter of 250mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 243-245mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 241-243mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 238-239mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 235-236mm；
During a diameter of 315mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 311-313mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 304-305mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 300-301mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 296-297mm；
During a diameter of 355mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 346-347mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 342-344mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 338-339mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 333-335mm；
During a diameter of 400mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 390-391mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 386-388mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 381-382mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 376-377mm；
During a diameter of 450mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 439-440mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 436-437mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 429-430mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 422-424mm；
During a diameter of 500mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 488-489mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 484-485mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 475-477mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 470-471mm；
During a diameter of 630mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section
For 613-614mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 608-609mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section is 598-600mm.
In an embodiment of the invention, sizing section 4 is provided with multiple separate sizing segment units, Ge Geding
Footpath segment unit is provided with the sizing section closed chamber of a closing；Changeover portion is connected with first sizing segment unit.
The present invention is provided with sealing ring 6 in the rear side of guide section 1, sealing ring 6 relative to guide section 1 lateral surface convex
Go out.The sealing acting as after increase base pipe pyrocondensation between guide section 1 of sealing ring 6 is set.
In the present invention, in offering the balancing slit parallel with its lateral surface bus on the lateral surface of caliber expansion elements 2.
Balancing slit is strip trough body structure, and balancing slit opens up multiple, whole balancing slits around lateral surface of caliber expansion elements 2 etc.
It is arranged at intervals.Balancing slit is act as：First through hole 3 is offered in the bottom land of balancing slit, pressurising medium is by first through hole 3 equal
It can ensure that pressurising homogeneous media sprays under the structure function of indent so that barrier film is more likely formed；Further reduce base pipe and expansion
Frictional force between mould so that the continuous motion of base pipe is more smooth.
In the present invention, caliber expansion elements 2 include nose cone portion and are arranged at close on rear side of nose cone portion
Section is sealed, nose cone portion is cone structure.Wherein, the back segment lateral surface in nose cone portion is plane or arcwall face；Seal section
Lateral surface is plane, concave surface or convex surface.
PVC-O tubing, it is necessary to tubing to be tensioned is heated to elastomeric state, utilizes the expansion of the present invention in production and processing
Mould expands tubing, and quickly cooling and shaping is carried out to tubing in the case where keeping expanding.Produce the stretching of PVC-O tubing
Journey simply says the blank drawing pipe that exactly would be heated to hauling machine under elastomeric state and fully wrapped around by dilatation mold,
PVC-O tubing is a kind of heat-shrink tube (the blank tubulose state bounced back to after heated before stretching) again, passes through expansion in tubing parcel
Very huge resistance can be produced during mould, this resistance can cause drawing pipe to fail, in order to solve the problem, the expansion to tubing
Mould inputs certain pressure source (including air pressure, hydraulic pressure, hydraulic pressure etc.), and dilatation mold can be outwards defeated in the presence of pressure source
Go out pressure, this pressure, which acts on pipe material inner wall, can offset the retraction force of tubing itself, in the state of balance between two forces, can make
Obtain and a barrier film is formed between dilatation mold and the inner tubal wall of tubing, so non-can be significantly reduced resistance consequently facilitating to pipe
The stretching of material.
Present invention also offers one kind production PVC-O, BOPVC, biaxial tension PVC production line, include and be used for
The heater heated to tubing and the cooling and shaping device for carrying out cooling and shaping to tubing.Production PVC-O,
BOPVC, biaxial tension PVC are arranged between heater and cooling and shaping device with dilatation mold.
Dilatation mold is provided between heater and cooling and shaping device, the dilatation mold is production described above
PVC-O, BOPVC, biaxial tension PVC dilatation mold.
Base pipe is axially and radially drawn tubing by heating devices heat under high-elastic state by dilatation mold
Stretch, the quick cooling and shaping under the effect of cooling and shaping device of the tubing after expansion, carry out other techniques again afterwards and complete production.
Present invention also offers it is a kind of produce PVC-O, BOPVC, biaxial tension PVC method, in the method,
The present invention using production PVC-O, BOPVC described above, biaxial tension PVC dilatation mold to the common PVC after heating-
U tubing is used to producing PVC-O, BOPVC, the blank tubing used in biaxial tension PVC is axially and radially stretched, from
And blank tubing inside points subchain is caused to reticulate structure.
Embodiments of the invention provide for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be to more preferably illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to designing the various embodiments with various modifications suitable for special-purpose.
Claims (14)
1. one kind production PVC-O, BOPVC, biaxial tension PVC dilatation mold, for production PVC-O, BOPVC, double
Axially and radially stretching to the blank tubing used in stretching PVC, it is characterised in that including：
Guide section (1), the cross section of the guide section is circular configuration；
The caliber expansion elements (2) being arranged on rear side of the guide section, the caliber expansion elements are cone structure, the caliber
The miner diameter end of expansion elements is connected with the guide section, and first through hole (3) is offered in the surface of the caliber expansion elements；
Sizing section (4), the sizing section are arranged at the rear end of the caliber expansion elements, in offering second on the sizing section
Through hole (5).
2. production PVC-O, BOPVC according to claim 1, biaxial tension PVC dilatation mold, its feature exist
In,
It is independent in being provided with the caliber expansion elements in being provided with independent guide section closed chamber on the guide section
Expansion elements closed chamber, in being provided with independent sizing section closed chamber on the sizing section；
The first through hole connects with the expansion elements closed chamber.
3. production PVC-O, BOPVC according to claim 1, biaxial tension PVC dilatation mold, its feature exist
In,
The caliber expansion elements are provided with multiple, the whole caliber expansion elements coaxially settings arranged in a straight line, adjacent
Cross-sectional diameter between two caliber expansion elements is incremented by successively and expansion segment formed with step structure；
One end of the expansion segment is connected with the sealing ring, and the other end of the expansion segment is connected with the sizing section.
4. production PVC-O, BOPVC according to claim 3, biaxial tension PVC dilatation mold, its feature exist
In,
It is provided with changeover portion between the expansion segment and the sizing section, the changeover portion is cone structure, the changeover portion
Miner diameter end closing, the bigger diameter end of the changeover portion be open hatch frame, the bigger diameter end of the changeover portion and the sizing
Duan Liantong.
5. production PVC-O, BOPVC according to claim 4, biaxial tension PVC dilatation mold, its feature exist
In,
The sizing section is provided with multiple separate sizing segment units, and each sizing segment unit is provided with an envelope
The sizing section closed chamber closed；
The changeover portion is connected with first sizing segment unit.
6. production PVC-O, BOPVC, biaxial tension PVC dilatation mold according to any one of claim 1 to 5,
Characterized in that,
The sealing ring (6) being arranged on rear side of the guide section, the sealing ring relative to the guide section lateral surface convex
Go out.
7. production PVC-O, BOPVC according to claim 6, biaxial tension PVC dilatation mold, its feature exist
In,
In offering the balancing slit parallel with its lateral surface bus, the first through hole on the lateral surface of the caliber expansion elements
It is opened in the bottom land of the balancing slit.
8. production PVC-O, BOPVC according to claim 1, biaxial tension PVC dilatation mold, its feature exist
In,
The caliber expansion elements include nose cone portion and the seal section being arranged on rear side of the nose cone portion, described
Nose cone portion is cone structure.
9. production PVC-O, BOPVC according to claim 8, biaxial tension PVC dilatation mold, its feature exist
In,
The back segment lateral surface in the nose cone portion is plane or arcwall face；
The lateral surface of the seal section be plane, concave surface and or convex surface.
10. production PVC-O, BOPVC according to claim 1, biaxial tension PVC dilatation mold, its feature exist
In,
The guide section be solid construction guide section, the caliber expansion elements be solid construction caliber expansion elements, institute
State the sizing section that sizing section is solid construction.
11. production PVC-O, BOPVC according to claim 1, biaxial tension PVC dilatation mold, its feature exist
In,
The sizing section carries out sizing to blank tubing, and the sizing section is straight pipe type structure, the sizing section and production tube
Relation between outside dimension is：
During a diameter of 110mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section is
105-107mm, pressure rating 1.6MPa, the outside dimension scope of the sizing section is 104-105.4mm, and pressure rating is
2.0MPa, the outside dimension scope of the sizing section is 103-104mm；
During a diameter of 125mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section is
120-121mm, pressure rating 1.6MPa, the outside dimension scope of the sizing section is 118-119mm, and pressure rating is
2.0MPa, the outside dimension scope of the sizing section is 116-117mm；
During a diameter of 160mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
155-157mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 154-155mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 152-153mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 151-152mm；
During a diameter of 200mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
194-196-197mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 193-194mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 190-191mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 187-189mm；
During a diameter of 225mm of the pipe external diameter of production tube, pressure rating 1.0MPa, the outside dimension scope of the sizing section is
217-218mm, pressure rating 1.25MPa, the outside dimension scope of the sizing section is 216-217mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 214-215mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 211-212mm；
During a diameter of 250mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
243-245mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 241-243mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 238-239mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 235-236mm；
During a diameter of 315mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
311-313mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 304-305mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 300-301mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 296-297mm；
During a diameter of 355mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
346-347mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 342-344mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 338-339mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 333-335mm；
During a diameter of 400mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
390-391mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 386-388mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 381-382mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 376-377mm；
During a diameter of 450mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
439-440mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 436-437mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 429-430mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 422-424mm；
During a diameter of 500mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
488-489mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 484-485mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section are 475-477mm, pressure rating 2.0MPa, the external diameter of the sizing section
Size range is 470-471mm；
During a diameter of 630mm of the pipe external diameter of production tube, pressure rating 0.8MPa, the outside dimension scope of the sizing section is
613-614mm, pressure rating 1.0MPa, the outside dimension scope of the sizing section is 608-609mm, and pressure rating is
1.6MPa, the outside dimension scope of the sizing section is 598-600mm.
12. one kind production PVC-O, BOPVC, biaxial tension PVC production line, include for being heated to tubing
Heater and the cooling and shaping device for carrying out cooling and shaping to tubing, it is characterised in that
Also include expanding just like production PVC-O, BOPVC described in any one of claim 1 to 11, biaxial tension PVC
Mould；
The production PVC-O, BOPVC, biaxial tension PVC are arranged at the heater and described cold with dilatation mold
But between shaping equipment.
13. a kind of produce PVC-O, BOPVC, the method for biaxial tension PVC, it is characterised in that
Use production PVC-O, BOPVC as described in any one of claim 1 to 11, biaxial tension PVC dilatation mold
Common PVC-U tubing after heating is used to producing PVC-O, BOPVC, the blank pipe used in biaxial tension PVC carries out axle
To and radial drawing so that blank tubing inside points subchain reticulates structure.
14. production PVC-O, BOPVC according to claim 13, the method for biaxial tension PVC, its feature exist
In,
PVC-U blanks tubing when being climbed in expansion body by center-pole to expansion body front end provide principal pressure, while
The tail end of expansion body provides aux. pressure, and its pressure source can be air pressure, hydraulic pressure or other fluid pressures；
When PVC-U blank tubing it is fully wrapped around by expansion body after, disconnect input aux. pressure, only persistently provide pressure by center-pole
Power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689305.1A CN107443716A (en) | 2017-08-14 | 2017-08-14 | Produce PVC O, BOPVC, biaxial tension PVC dilatation mold, production line and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710689305.1A CN107443716A (en) | 2017-08-14 | 2017-08-14 | Produce PVC O, BOPVC, biaxial tension PVC dilatation mold, production line and method |
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| Publication Number | Publication Date |
|---|---|
| CN107443716A true CN107443716A (en) | 2017-12-08 |
Family
ID=60492165
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710689305.1A Pending CN107443716A (en) | 2017-08-14 | 2017-08-14 | Produce PVC O, BOPVC, biaxial tension PVC dilatation mold, production line and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108859077A (en) * | 2018-07-17 | 2018-11-23 | 黄石市至正橡塑新材料股份有限公司 | A kind of heat-shrink tube expansion tube production line |
| CN115326860A (en) * | 2022-10-12 | 2022-11-11 | 苏州科斯林电力科技有限公司 | Test system for retraction stress of heat-shrinkable sleeve |
| CN116252464A (en) * | 2023-05-15 | 2023-06-13 | 河北建投宝塑管业有限公司 | Control system and control method for orientation process of oriented PVC-O pipe |
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| EA000977B1 (en) * | 1995-09-20 | 2000-08-28 | Юпонор Б.В. | Oriented polymeric products |
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| CN116252464A (en) * | 2023-05-15 | 2023-06-13 | 河北建投宝塑管业有限公司 | Control system and control method for orientation process of oriented PVC-O pipe |
| CN116252464B (en) * | 2023-05-15 | 2023-08-11 | 河北建投宝塑管业有限公司 | Control system and control method for orientation process of oriented PVC-O pipe |
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Application publication date: 20171208 |