CN103213265B - The extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder - Google Patents
The extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder Download PDFInfo
- Publication number
- CN103213265B CN103213265B CN201310120649.2A CN201310120649A CN103213265B CN 103213265 B CN103213265 B CN 103213265B CN 201310120649 A CN201310120649 A CN 201310120649A CN 103213265 B CN103213265 B CN 103213265B
- Authority
- CN
- China
- Prior art keywords
- pipe die
- die
- pipe
- core rod
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000005187 foaming Methods 0.000 title claims abstract description 27
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 19
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 15
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 15
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 15
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 238000004513 sizing Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 10
- 239000004033 plastic Substances 0.000 abstract description 8
- 229920003023 plastic Polymers 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 206010000269 abscess Diseases 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
Abstract
The invention belongs to plastic extruder technical field, relate to the extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder, after pipe die, die sleeve is fixedly connected with die sleeve before pipe die, after pipe die, the rear side of die sleeve inner chamber is provided with pipe die positioning sleeve, installed in front has pipe die core rod, the front portion of pipe die core rod to be arranged on before pipe die in die sleeve, after pipe die, die sleeve is provided with on pipe die core rod the air exhaust rod being communicated with pipe die core rod centre bore, air exhaust rod is bolted with pressure regulator valve, the head of pipe die core rod is provided with prismoid section and the straight sections of necking down formation, homogenizing chamber is formed with between die sleeve before die sleeve and pipe die after pipe die core rod and pipe die, compression chamber is formed with between die sleeve before pipe die core rod prismoid section and pipe die, chamber of shaping is formed with between die sleeve before pipe die core rod straight sections and pipe die, homogenizing chamber, compression chamber, the inner chamber of sizing chamber and pipe die positioning sleeve is interconnected, advantage is: the surfacing of the PP foaming bandlet prepared, width is even, there is matt effect, yield rate is high.
Description
Technical field
The invention belongs to plastic extruder technical field, refer in particular to the extruder head of the foaming bandlet of a kind of supercritical carbon dioxide/polypropylene extruder.
Background technology
Foamed plastics is the focusing body that gas dispersion is formed in solid polymer, is apply higher products similar.Wherein PP(polypropylene) advantage such as to reclaim with its higher rigidity, excellent mechanical property, good chemistry and heat endurance and good environmental adaptation and being easy to and become the preferred material of foamed plastics, be widely applied in the field of the high standards such as automobile, electronics, office stationary, high performance requirements do heat insulation with amortizing packaging material etc.Due to foamed plastics, particularly PP(polypropylene) be the environmental friendliness shaped material of a kind of easy degraded, good rigidly, heat-resisting and easy recovery, so in field of artware, the application particularly on table mat starts extensively to replace plastics table linen.And manufacture and bandlet in the material of braiding table mat are its required raw materials, particularly alleviate weight after foaming and greatly reduce cost, so be more and more used widely.
Extruder is for rubber, plastics mix continuously, the device of extrusion molding, its head is the critical piece of extruder, head is built with stock mould, head makes all one from the plastics of extruder and blowing agent be that parallel lines is moved by converting rotary motion, along certain runner by the importing stock mould of head neck uniform and stable, and give homogeneous system shaping necessary briquetting pressure, become homogeneous system and stop nucleation and foaming in machine, the shape of material is carried out shaping and stablizing, simultaneously to its finishing, thus it is more accurate to obtain sectional dimension, the continuous foamed material that cross sectional shape is consistent.
Because the supercritical pressure of carbon dioxide is very high, and for physical blowing, the polymer/supercritical carbon dioxide systems becoming homogeneous phase in extruder and head is very crucial, and therefore head and runner design thereof also just seem crucial especially.After this system goes out head, pressure discharges suddenly, and foaming process therefore can be caused to be difficult to control.Consequent effect is that expanded material occurs that surface irregularity, wash boarding, feel are comparatively hard, abscess merges and break and surface-brightening etc.In addition, because foaming process is wayward, and build-up of pressure is uneven, thus causes the difference of foam degrees.It is inconsistent at surface quality, expansion ratio, cell size and uniformity, feel and matt effect that the consequence directly caused is exactly the bandlet prepared, and causes yield rate extremely low.
For the shaping requirement of foaming bandlet be surfacing, without obvious striped, soft and have matt effect, the conventional flat die head of its extruder, conventional tubular die head or blowpipe die head are all difficult to reach requirement.Because traditional flat-mould head and traditional tubulose die head due to the rate of closed hole produced in foaming process very high, and the less feel that causes of expansion ratio is stone, and tearing strength extreme difference; What traditional tubulose die head was extruded is a foaming tube, and the difference of foam degrees causes the diameter of the pipe extruded different, thus the width of the bandlet of preparation can be made to be difficult to reach less tolerance, and therefore, yield rate also reduces greatly.Common blowpipe die head is open-celled structure due to what produce completely, goes out after die head and can generate a hollow tube rapidly, and therefore, the internal stress of generation is large, causes that the surface smoothness of foaming bandlet is bad, striped is many and do not have matt effect.Because the tolerance stayed in hollow tube is in process of production uncontrollable, therefore, the different diameters of the hollow tube generated at different time is very large, thus causes production technology cannot stability contorting and be difficult to obtain the uniform product of width, and yield rate is extremely low.
Summary of the invention
The object of this invention is to provide the extruder head of the foaming bandlet of a kind of supercritical carbon dioxide/polypropylene extruder, make the surfacing of the foaming bandlet prepared, without obvious striped, soft, width even, have matt effect, ensure in manufacture process, keep the diameter of expanding hollow pipe by the stable gas pressure in the expanding hollow pipe after automatically controlling out tubulose head consistent all the time simultaneously, thus ensureing that the even width of the foaming bandlet prepared is consistent, yield rate is high.
The object of the present invention is achieved like this:
The extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder, after pipe die, die sleeve is fixedly connected with die sleeve before pipe die, after pipe die, the rear side of die sleeve inner chamber is provided with pipe die positioning sleeve, installed in front has pipe die core rod, the front portion of pipe die core rod to be arranged on before pipe die in die sleeve, after pipe die, die sleeve is provided with on pipe die core rod the air exhaust rod being communicated with pipe die core rod centre bore, air exhaust rod is bolted with pressure regulator valve, the head exterior surface of pipe die core rod is provided with the prismoid section of necking down formation and the straight sections that forward extend identical with the external diameter of the minor diameter part of prismoid section, after the outer surface of pipe die core rod and pipe die before die sleeve and pipe die die sleeve inner surface between be formed with homogenizing chamber, before the outer surface of pipe die core rod prismoid section and pipe die die sleeve inner surface between be formed with compression chamber, before the outer surface of pipe die core rod straight sections and pipe die die sleeve inner surface between be formed with chamber of shaping, homogenizing chamber, compression chamber, sizing chamber and the inner chamber of pipe die positioning sleeve are interconnected formation inner flow passage.
After the above-mentioned pipe die stated, die sleeve and die sleeve before pipe die are spirally connected by screw and are connected, are located by alignment pin.
Above-mentioned automatic pressure regulator can be the pressure valve automatically opened or closed under the preset pressure of setting up.
Above-mentioned automatic pressure regulator is overflow valve or safety valve.
Above-mentioned pipe die core rod stretches out outside the front end face of pipe die front mould cover.
The present invention gives prominence to compared to existing technology and useful technique effect is:
1, the gas in the expanding hollow pipe extruded by pipe die can be entered air exhaust rod by the hole at pipe die core rod center by air exhaust rod by the present invention, be discharged in air by automatic pressure regulator again, change the pressure in expanding hollow pipe by the amount changing the gas in expanding hollow pipe at any time.The size of pressure directly can cause the size of the diameter of expanding hollow pipe.And pressure pre-sets according to process conditions by automatic pressure regulator, after the pressure in expanding hollow pipe is greater than preset pressure, automatic pressure regulator automatically can be opened and gas unnecessary in expanding hollow pipe is discharged in air the pressure reduced in hollow tube; When the pressure that pressure is preset lower than automatic pressure regulator, automatic pressure regulator can be closed automatically, thus the pressure in expanding hollow pipe is raised.Therefore, gas pressure in expanding hollow pipe can be remained in a minimum scope by the effect of automatic pressure regulator and fluctuate, this scope is only relevant with the precision of automatic pressure regulator, therefore, this foaming process is realized completely controlled, the even width of the foaming bandlet prepared, width tolerance is very little, thus substantially increases yield rate.
2, tubulose head of the present invention forms a longer runner by the forward and backward die sleeve of pipe die and pipe die core rod, this runner has very long homogenizing zone and certain sizing section, thus ensures that supercritical carbon dioxide/polypropylene keeps homogeneous system in extruder and head.The screw of material can be become rectilinear motion at this by homogenizing zone length preferably that increase tubulose head, thus ensures the homogeneity of foaming.Can be made by this design that the uniform foam cell of the bandlet prepared is consistent, cell size uniformity is good, expansion ratio accurately controls, rate of closed hole is higher, the goods of micropore abscess.And be that surfacing, good pliable and tough, higher tearing strength, soft, surface are without the effect of obvious striped and surperficial sub-light from the feature macroscopically shown.
3, the present invention is applicable to the extruder head making high-quality PP formed product equipment.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present invention.
Fig. 2 is the enlarged partial sectional view of stock mould inner flow passage structure of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, see Fig. 1-Fig. 2:
The extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder, after pipe die, die sleeve 2 is fixedly connected with die sleeve before pipe die 5, after pipe die, the rear side of die sleeve 2 inner chamber is provided with pipe die positioning sleeve 1, installed in front has pipe die core rod 3, the front portion of pipe die core rod 3 to be arranged on before pipe die in die sleeve 5, after pipe die die sleeve 1 with pipe die core rod 3 is provided with the air exhaust rod 11 being communicated with pipe die core rod 3 centre bore 10, air exhaust rod 11 is bolted with pressure regulator valve 12, the head exterior surface of pipe die core rod 3 is provided with the prismoid section 31 of necking down formation and the straight sections 32 that forward extend identical with the external diameter of the minor diameter part of prismoid section 31, after the outer surface of pipe die core rod 3 and pipe die before die sleeve 2 and pipe die die sleeve 5 inner surface between be formed with homogenizing chamber 9, before the outer surface of pipe die core rod prismoid section 31 and pipe die die sleeve 5 inner surface between be formed with compression chamber 7, before the outer surface of pipe die core rod straight sections 32 and pipe die die sleeve 5 inner surface between be formed with chamber 6 of shaping, homogenizing chamber 9, compression chamber 7, sizing chamber 6 and the inner chamber of pipe die positioning sleeve 1 are interconnected formation inner flow passage, the shaping required pressure of foaming bandlet is set up to ensure suitable rate of closed hole by this inner flow passage, cell size and structure, thus prepare surfacing, good is pliable and tough, higher tearing strength, soft, surface is without the bandlet goods of the effect of obvious striped and surperficial sub-light.
After the above-mentioned pipe die stated, die sleeve 2 and die sleeve before pipe die 5 are spirally connected by screw 8 and are connected, are located by alignment pin 4.
Above-mentioned automatic pressure regulator 12 can be the pressure valve automatically opened or closed under the preset pressure of setting up.
Above-mentioned automatic pressure regulator 12 is overflow valve or safety valve, but is not limited to overflow valve or safety valve.
Above-mentioned pipe die core rod 3 stretch out pipe die front mould cover 5 front end face 51 outside so that sizing and for product extrude guiding.
Above-described embodiment is only preferred embodiment of the present invention, not limits the scope of the invention according to this, therefore: all equivalence changes done according to structure of the present invention, shape, principle, all should be covered by within protection scope of the present invention.
Claims (5)
1. the extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder, it is characterized in that: after pipe die, die sleeve is fixedly connected with die sleeve before pipe die, after pipe die, the rear side of die sleeve inner chamber is provided with pipe die positioning sleeve, installed in front has pipe die core rod, the front portion of pipe die core rod to be arranged on before pipe die in die sleeve, after pipe die, die sleeve is provided with on pipe die core rod the air exhaust rod being communicated with pipe die core rod centre bore, air exhaust rod is bolted with pressure regulator valve, the head exterior surface of pipe die core rod is provided with the prismoid section of necking down formation and the straight sections that forward extend identical with the external diameter of the minor diameter part of prismoid section, after the outer surface of pipe die core rod and pipe die before die sleeve and pipe die die sleeve inner surface between be formed with homogenizing chamber, before the outer surface of pipe die core rod prismoid section and pipe die die sleeve inner surface between be formed with compression chamber, before the outer surface of pipe die core rod straight sections and pipe die die sleeve inner surface between be formed with chamber of shaping, homogenizing chamber, compression chamber, sizing chamber and the inner chamber of pipe die positioning sleeve are interconnected formation inner flow passage.
2. the extruder head of the foaming bandlet of supercritical carbon dioxide according to claim 1/polypropylene extruder, is characterized in that: after described pipe die, die sleeve and die sleeve before pipe die are spirally connected by screw and are connected, are located by alignment pin.
3. the extruder head of the foaming bandlet of supercritical carbon dioxide according to claim 1/polypropylene extruder, is characterized in that, automatic pressure regulator can be the pressure valve automatically opened or closed under the preset pressure of setting up.
4. the extruder head of the foaming bandlet of supercritical carbon dioxide according to claim 3/polypropylene extruder, is characterized in that: described automatic pressure regulator is overflow valve or safety valve.
5. the extruder head of the foaming bandlet of the supercritical carbon dioxide according to any one of claim 1-4/polypropylene extruder, is characterized in that: described pipe die core rod stretches out outside the front end face of pipe die front mould cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310120649.2A CN103213265B (en) | 2013-04-08 | 2013-04-08 | The extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310120649.2A CN103213265B (en) | 2013-04-08 | 2013-04-08 | The extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103213265A CN103213265A (en) | 2013-07-24 |
| CN103213265B true CN103213265B (en) | 2015-08-12 |
Family
ID=48811580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310120649.2A Expired - Fee Related CN103213265B (en) | 2013-04-08 | 2013-04-08 | The extruder head of the foaming bandlet of supercritical carbon dioxide/polypropylene extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103213265B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112297382B (en) * | 2020-08-31 | 2023-06-16 | 扬州吉山津田光电科技有限公司 | Injection molding equipment for hollow pipe fitting |
| CN112297383A (en) * | 2020-08-31 | 2021-02-02 | 扬州吉山津田光电科技有限公司 | Hollow pipe injection molding equipment with wide application range |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101480831A (en) * | 2009-01-19 | 2009-07-15 | 北京中拓机械有限责任公司 | Supercritical fluid aerating powder conveying device and control method |
| CN102615805A (en) * | 2012-03-22 | 2012-08-01 | 大连理工大学 | Right-angle extrusion die for multi-cavity plastic micro-pipe |
| CN203198218U (en) * | 2013-04-08 | 2013-09-18 | 天台县富力产业用布厂 | Extrusion head of foaming flat ribbon of supercritical carbon dioxide/polypropylene extruder |
-
2013
- 2013-04-08 CN CN201310120649.2A patent/CN103213265B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101480831A (en) * | 2009-01-19 | 2009-07-15 | 北京中拓机械有限责任公司 | Supercritical fluid aerating powder conveying device and control method |
| CN102615805A (en) * | 2012-03-22 | 2012-08-01 | 大连理工大学 | Right-angle extrusion die for multi-cavity plastic micro-pipe |
| CN203198218U (en) * | 2013-04-08 | 2013-09-18 | 天台县富力产业用布厂 | Extrusion head of foaming flat ribbon of supercritical carbon dioxide/polypropylene extruder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103213265A (en) | 2013-07-24 |
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| C06 | Publication | ||
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| ASS | Succession or assignment of patent right |
Owner name: TIANTAI CHENGYI NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: TIANTAI FULI INDUSTRIAL CLOTH FACTORY Effective date: 20141201 |
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Effective date of registration: 20141201 Address after: 317200, Tiantai County, Zhejiang province Baihe Town under the road Applicant after: The sincere new material Co., Ltd of balcony Address before: 317200, Zhejiang City, Taizhou province Tiantai County Baihe Town under the road Applicant before: Tiantai County Fuli Industrial Cloth Factory |
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Effective date of registration: 20170504 Address after: 6, No. 28, building 2, building 1, 1 West Avenue, Qingyang District, Sichuan, Chengdu, 610000 Patentee after: Liu Ke Address before: 317200, Tiantai County, Zhejiang province Baihe Town under the road Patentee before: The sincere new material Co., Ltd of balcony |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150812 Termination date: 20210408 |