CN104827651B - A kind of online two-way stretch device of plastic pipe - Google Patents
A kind of online two-way stretch device of plastic pipe Download PDFInfo
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- CN104827651B CN104827651B CN201510312968.2A CN201510312968A CN104827651B CN 104827651 B CN104827651 B CN 104827651B CN 201510312968 A CN201510312968 A CN 201510312968A CN 104827651 B CN104827651 B CN 104827651B
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- plastic pipe
- way stretch
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- 229920003023 plastic Polymers 0.000 title claims abstract description 28
- 239000004033 plastic Substances 0.000 title claims abstract description 26
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 230000035939 shock Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000001161 mammalian embryo Anatomy 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 1
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 1
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention discloses a kind of online two-way stretch device of plastic pipe, it is included in the mouth mold set on extrusion die, plug and the annular channel between mouth mold and plug, it is additionally provided with the die cavity being connected with the mouth mold, the core being connected with the plug, the expanding annular channel connected with the annular channel is sequentially provided with wherein between die cavity and core, the horizontal annular runner connected with expanding annular channel, cavity is provided with core, cyclone is provided with cavity, the inlet tube and outlet of cyclone are respectively communicated with external die heater, the diameter ratio of the diameter of the annular channel and the horizontal annular runner is 1:1.7‑1.9.It is an advantage of the invention that：The biaxial tension of tubing can be realized with on-line continuous, improves shock resistance and the tensile property of tubing, without high-pressure medium, sealing is convenient, simple in construction and safe and reliable.
Description
Technical field
The present invention relates to a kind of device of plastic processing, more particularly, to a kind of online two-way stretch device of plastic pipe.
Background technology
Plastic pipe is widely used at present, and it is several to be probably divided into special plastic, engineering plastics and general-purpose plastics,
Special plastic and engineering plastics high comprehensive performance but expensive, common plasticses performance and price is relatively low but combination property is general.
How to realize that the high performance of common plasticses is a major issue, and problem, wherein just including the two-way drawing of plastic pipe
Stretching process improves.
Biaxial tension can make plastics macromolecular chain along the regular arrangement of biaxially oriented, and the defects of eliminate wherein, thus obtain
High intensity, high tenacity, high-impact, antifatigue new type plastic pipe.
The most successful application of stretch processes technology is BOPP film, although principle is the same, in contour machining procedure
In equipment, plastic pipe has obvious difference with film, and directly results in plastic pipe will implement biaxial tension, and technology is difficult
Degree is bigger.
At present by whether can continuous production, stretch processes are divided into two kinds of off-line process and on-line method.But no matter off-line process
Or on-line method, the country also rest on development, do not have so far can batch and steady production technique and equipment.It is offline two-way
Drawing process equipment and technics comparing are simple, can reach preferable orientation effect, and producible product scope is wider, but produce
Efficiency is low, artificial and high energy consumption, causes integrated cost higher.Online stretch processes production efficiency is higher, artificial and energy consumption
It is less, it is empty by the heat of internal high pressure tubing from the less thick material embryo of bore respectively using hot-air and hot water two media
The medium such as gas or hot water, expands into larger caliber tubing.But no matter medium is hot-air or hot water, because pressure is high, exist
The sealing problem of high-pressure medium, and need the very high superduty hauling machine of tractive force, equipment and complex process, equipment price
Also it is very expensive.
The content of the invention
It is an object of the invention to provide one kind plastic melt can be made to be completed in simple core and die cavity runner two-way
Stretching is orientated and freezed, and can continuous production, the online two-way stretch device of lower-cost plastic pipe.
The present invention technical solution be：A kind of online two-way stretch device of plastic pipe, is included on extrusion die
Mouth mold, plug and the annular channel between mouth mold and plug of setting, it be additionally provided be connected with the mouth mold die cavity,
The expanding annular connected with the annular channel is sequentially provided between the core being connected with the plug, wherein die cavity and core
Runner, the horizontal annular runner connected with expanding annular channel, core is interior to be provided with cavity, and cyclone is provided with cavity, is revolved
Flow the inlet tube of device and outlet is respectively communicated with external die heater, the diameter of the annular channel and the horizontal annular runner
Diameter ratio is 1:1.7-1.9.
The expanding annular channel formed between die cavity and core is communicated with annular channel, and cavity and rotation are provided with core
Device is flowed, is connected by pipeline with external die heater, heat exchange medium can enter inside core, and medium is under the guiding of cyclone
Olderly flowage in the cavities, improves the efficiency of heat exchange, and makes the temperature of each several part more uniform, in the mouth mold and core of original mould
The melt plastified in annular channel between rod, horizontal annular runner can be flowed to by expanding annular channel
Interior, melt completes biaxial tension orientation in flow process, passes through the regulation of external die heater, it is ensured that temperature in core
Accurate control, so that the orientation of melt is frozen, the tubing type embryo being orientated is formed, led by existing cooling, sizing
Draw and the technique such as cutting, the tubing of bore can be needed to produce.By setting die cavity and core on mould, realize online
Continuous and stable production, heated without high-pressure medium, it is simple in construction, it is safe and reliable.
Angle between the expanding annular channel and the annular channel extended line is 20 ° -30 °.Preferably 25 °.
The degree of tubing biaxial tension orientation can be ensured, improve finished product tubing tensile yield strength, shock resistance effect is more preferable, also simultaneously
Moulding processability can be ensured.
The diameter ratio of the diameter of the annular channel and the horizontal annular runner is 1:1.8.Ensureing that formed product adds
On the basis of work performance, the degree of tubing biaxial tension orientation is fully improved, improves finished product tubing tensile yield strength, further
Lift shock resistance effect.
The thermocouple being connected with external die heater is provided with the core.It is convenient that temperature in core is measured, have
Beneficial to accurate control mandrel temperatures, ensure the freezing efficiency to stretching.
Temperature control is at 110 DEG C -130 DEG C in the core.Preferably 120 DEG C.Both the biaxial tension of melt can have been ensured
Degree of orientation, finished product tubing tensile yield strength is improved, the phenomenon of disorientation or processing and forming difficulty can be avoided the occurrence of again.
It is an advantage of the invention that：The biaxial tension of tubing can be realized with on-line continuous, improves the shock resistance and stretching of tubing
Performance, without high-pressure medium, sealing is convenient, simple in construction and safe and reliable.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of two-way stretch device of the embodiment of the present invention；
Accompanying drawing 2 is the partial enlarged drawing in accompanying drawing 1；
1st, mouth mold, 2, plug, 3, annular channel, 4, die cavity, 5, core, 6, expanding runner, 7, horizontal annular runner, 8,
Cavity, 9, cyclone, 10, inlet tube, 11, outlet, 12, thermocouple, 13, thermocouple interface, 14, media outlet, 15, medium
Entrance.
Embodiment
Embodiment：
Refering to Fig. 1-2, a kind of online two-way stretch device of plastic pipe, be included in set on extrusion die mouth mold 1,
Plug 2 and the annular channel 3 between mouth mold 1 and plug 2, it is additionally provided with the die cavity 4 being connected with mouth mold, is connected with plug 2
Core 5, the expanding annular channel 6 and expanding that are connected with annular channel 3 are sequentially provided with wherein between die cavity 4 and core 5
The horizontal annular runner 7 that annular channel 6 connects, core 5 is interior to be provided with cavity 8, and cyclone 9 is provided with cavity 8, cyclone 9
Inlet tube 10 and outlet 11 are respectively communicated with media outlet 14 and the medium inlet 15 of external die heater.Be provided with the core 5 with
The thermocouple 12 that external die heater thermocouple interface 13 connects.Folder between expanding annular channel 6 and the extended line of annular channel 3
Angle α is 20 ° -30 °, and preferably α is 25 °.In addition, the diameter ratio of the diameter of annular channel 3 and horizontal annular runner 7 is 1:1.7-
1.9, preferably 1:1.8.By external die heater, control type in-core temperature is at 110 DEG C -130 DEG C, preferably 120 DEG C.
The expanding annular channel 6 formed between die cavity 4 and core 5 is communicated with annular channel 3, and sky is provided with core 5
Chamber 8 and cyclone 9, the inlet tube 10 of cyclone 9 connect the media outlet 14 of external die heater, and outlet 11 connects external mould temperature
The medium such as medium inlet 15, the silicone oil or water of constant temperature of machine can enter in core 5, and medium is under the guiding of cyclone 9 in sky
Olderly flowage in chamber 8, the efficiency of heat exchange is improved, so as to accurately control the temperature of core 5.In the mouth mold 1 of tube extrusion die
The melt plastified in annular channel 3 between plug 2, horizontal loops can be flowed to by expanding annular channel 6
In shape runner 7, melt completes biaxial tension orientation in flow process, passes through the regulation of external die heater, it is ensured that core 5
The accurate control of interior temperature, so that the orientation of melt is frozen, the tubing type embryo being orientated is formed, by existing cold
But, the technique such as sizing drawing and cutting, the tubing of bore can be needed to produce.
Beneficial effects of the present invention are further illustrated below by way of experiment.
By taking the PVC of 110 × 3.2mm specifications as an example
1st, under same formula, the common finished product tubing and the obtained pipe of the embodiment of the present invention of biaxial tension orientation are not carried out
Material performance and moulding processability contrast are as shown in table 1：
Table 1：Pipe performance contrast table after common tubing and progress biaxial tension orientation
From the correction data in table 1 can be seen that tubing carry out biaxial tension orientation after Charpy Impact, drop impact
Can it be improved a lot with tensile yield strength.
2nd, an important technology index for assessing degree of orientation is the tensile yield strength of production tube, in same formula situation
Under, degree of orientation is bigger, then tensile yield strength is bigger, and Charpy Impact is also higher.Control core 5 is carried out at different temperatures
Performance and the moulding processability contrast of tubing after biaxial tension are as shown in table 2：
Table 2：Influence of the different temperatures to stretching orientation
As can be seen from the above table, if temperature is too low, melt viscosity is big, and melt pressure is high, causes to be stranded to processing and forming
Difficulty, and temperature control is too high, and opposite disorientation easily occurs after orientation, the tensile yield strength of production tube can decline, and influence
Properties of product, therefore the temperature control in core 5 is between 110~130 DEG C, preferably 120 DEG C.
3rd, the ratio of the outlet diameter of horizontal annular runner 7 and the outlet diameter of annular channel 3, it is two-way also to influence tubing
The degree of orientation is stretched, as shown in table 3：
Table 3：Horizontal annular runner 7 contrasts with the outlet diameter ratio of annular channel 3
According to upper table data, the ratio of the outlet diameter of horizontal annular runner 7 and the outlet diameter of annular channel 3 is 1.7
When between~1.9, the tensile yield strength combination property of production tube is best.
4th, the angle α between expanding annular channel and annular channel extended line also has corresponding to the performance of finished product tubing
Influence, it is as shown in table 4 below：
The angle α of table 4 contrasts to the performance impact of finished product tubing
Angle α between expanding annular channel and annular channel extended line is bigger, the tensile yield strength meeting of production tube
Increase, brings the difficulty of processing and forming simultaneously, and angle α is smaller, though handling ease, tensile yield strength accordingly declines.
Above-listed detailed description is illustrating for one of present invention possible embodiments, and the embodiment simultaneously is not used to limit
The scope of the claims of the present invention, all equivalence enforcements or change without departing from carried out by the present invention, it is intended to be limited solely by the scope of the claims of this case
In.
Claims (8)
1. a kind of online two-way stretch device of plastic pipe, it is included in the mouth mold set on extrusion die, plug and positioned at mouth mold
Annular channel between plug, it is characterised in that：It is additionally provided with the die cavity being connected with the mouth mold, is connected with the plug
The expanding annular channel connected with the annular channel and expansion type ring are sequentially provided with before core, wherein die cavity and core
The horizontal annular runner of shape flow passage, is provided with cavity in core, is provided with cyclone in cavity, the inlet tube of cyclone with go out
Mouth pipe is respectively communicated with external die heater, the interval of the cavity and the expanding annular channel and the horizontal annular runner
From.
A kind of 2. online two-way stretch device of plastic pipe according to claim 1, it is characterised in that：The expansion type ring
Angle between shape passage and the annular channel extended line is 20 °~30 °.
A kind of 3. online two-way stretch device of plastic pipe according to claim 2, it is characterised in that：The expansion type ring
Angle between shape runner and the annular channel extended line is 25 °.
A kind of 4. online two-way stretch device of plastic pipe according to claim 1 or 2 or 3, it is characterised in that：The ring
The outlet diameter ratio of the outlet diameter of shape runner and the horizontal annular runner is 1:1.7-1.9.
A kind of 5. online two-way stretch device of plastic pipe according to claim 4, it is characterised in that：The annular channel
The outlet diameter ratio of outlet diameter and the horizontal annular runner be 1:1.8.
A kind of 6. online two-way stretch device of plastic pipe according to claim 4, it is characterised in that：In the core
Provided with the thermocouple being connected with external die heater.
A kind of 7. online two-way stretch device of plastic pipe according to claim 4, it is characterised in that：It is warm in the core
Degree control is at 110 DEG C -130 DEG C.
A kind of 8. online two-way stretch device of plastic pipe according to claim 7, it is characterised in that：It is warm in the core
Degree control is at 120 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510312968.2A CN104827651B (en) | 2015-06-09 | 2015-06-09 | A kind of online two-way stretch device of plastic pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510312968.2A CN104827651B (en) | 2015-06-09 | 2015-06-09 | A kind of online two-way stretch device of plastic pipe |
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| Publication Number | Publication Date |
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| CN104827651A CN104827651A (en) | 2015-08-12 |
| CN104827651B true CN104827651B (en) | 2018-01-09 |
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| CN201510312968.2A Active CN104827651B (en) | 2015-06-09 | 2015-06-09 | A kind of online two-way stretch device of plastic pipe |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105599314B (en) * | 2015-12-28 | 2018-01-02 | 山东华信塑胶股份有限公司 | A kind of apparatus for continuous formation and method of work of biaxially orienting polyvinyl chloride tubing |
| CN112847906B (en) * | 2021-01-25 | 2023-03-14 | 宜宾天亿新材料科技有限公司 | Multi-section type pipe heating device used before preparation of PVC-O pipe fitting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060255497A1 (en) * | 2003-03-07 | 2006-11-16 | Bernard Prevotat | Method for continuously producing plastic tubes by biaxial drawing and a production line for carrying out said method |
| CN101537712A (en) * | 2009-04-07 | 2009-09-23 | 山东陆宇塑胶工业有限公司 | Continuous production technology of polyvinyl chloride pipe stretched in two directions |
| CN101670665A (en) * | 2009-10-19 | 2010-03-17 | 杭州波达塑料科技股份有限公司 | Online biaxial-orienting PVC extrusion molding mould |
| CN102029711A (en) * | 2009-09-27 | 2011-04-27 | 上海酬智塑胶科技有限公司 | Biaxial orientation processing equipment for thermoplastic plastic pipe |
| CN204773543U (en) * | 2015-06-09 | 2015-11-18 | 佛山市日丰企业有限公司 | Online biaxial stretching device of plastics tubular product |
-
2015
- 2015-06-09 CN CN201510312968.2A patent/CN104827651B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060255497A1 (en) * | 2003-03-07 | 2006-11-16 | Bernard Prevotat | Method for continuously producing plastic tubes by biaxial drawing and a production line for carrying out said method |
| CN101537712A (en) * | 2009-04-07 | 2009-09-23 | 山东陆宇塑胶工业有限公司 | Continuous production technology of polyvinyl chloride pipe stretched in two directions |
| CN102029711A (en) * | 2009-09-27 | 2011-04-27 | 上海酬智塑胶科技有限公司 | Biaxial orientation processing equipment for thermoplastic plastic pipe |
| CN101670665A (en) * | 2009-10-19 | 2010-03-17 | 杭州波达塑料科技股份有限公司 | Online biaxial-orienting PVC extrusion molding mould |
| CN204773543U (en) * | 2015-06-09 | 2015-11-18 | 佛山市日丰企业有限公司 | Online biaxial stretching device of plastics tubular product |
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| CN104827651A (en) | 2015-08-12 |
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Address after: 528000 Guangdong province Foshan City Temple Road No. 16 HSBC Building 8 floor Applicant after: RIFENG ENTERPRISE GROUP Co.,Ltd. Applicant after: RIFENG TECHNOLOGY Co.,Ltd. Address before: 528000 Guangdong province Foshan City Temple Road No. 16 HSBC Building 8 floor Applicant before: Foshan Rifeng Enterprise Co.,Ltd. Applicant before: FOSHAN RIFENG ENTERPRISE SCIENCE & TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20171023 Address after: 528100 Guangdong Province, Foshan City Sanshui District of Leping Town, Feng Road No. 1 F1-F14 Applicant after: RIFENG ENTERPRISE (FOSHAN) Co.,Ltd. Applicant after: RIFENG ENTERPRISE GROUP Co.,Ltd. Applicant after: RIFENG TECHNOLOGY Co.,Ltd. Address before: 528000 Guangdong province Foshan City Temple Road No. 16 HSBC Building 8 floor Applicant before: RIFENG ENTERPRISE GROUP Co.,Ltd. Applicant before: RIFENG TECHNOLOGY Co.,Ltd. |
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Application publication date: 20150812 Assignee: Foshan Rifeng New Pipe Co.,Ltd. Assignor: RIFENG ENTERPRISE (FOSHAN) Co.,Ltd.|RIFENG ENTERPRISE GROUP Co.,Ltd.|RIFENG TECHNOLOGY Co.,Ltd. Contract record no.: 2019440000041 Denomination of invention: Online two-way stretching device of plastic pipes Granted publication date: 20180109 License type: Common License Record date: 20190315 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20150812 Assignee: RiFeng New Material Co.,Ltd. Assignor: RIFENG ENTERPRISE (FOSHAN) Co.,Ltd.|RIFENG ENTERPRISE GROUP Co.,Ltd.|RIFENG TECHNOLOGY Co.,Ltd. Contract record no.: X2023980038607 Denomination of invention: An online biaxial stretching device for plastic pipes Granted publication date: 20180109 License type: Common License Record date: 20230726 |