CN101811358B - Composite metal plastic pipe extrusion molding device and molding method thereof - Google Patents
Composite metal plastic pipe extrusion molding device and molding method thereof Download PDFInfo
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- CN101811358B CN101811358B CN2010101491089A CN201010149108A CN101811358B CN 101811358 B CN101811358 B CN 101811358B CN 2010101491089 A CN2010101491089 A CN 2010101491089A CN 201010149108 A CN201010149108 A CN 201010149108A CN 101811358 B CN101811358 B CN 101811358B
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Abstract
The invention discloses a composite metal plastic pipe extrusion molding device and a molding method thereof. The device comprises a sieve mesh cover, a connection flange, a wedging ring, a core rod, a material cover, an airless assisted mold and a connecting outer cover; the right end of the airless assisted mold is connected with an air assisted mold; the outer side of the air assisted mold is provided with an air assisted mold outer cover; the air assisted mold outer cover is connected with a mold air inlet cover plate; the leak tightness of air passage is guaranteed through a sealing ring; the right end of the core rod is connected with the inner cover of the core rod; and the right end is connected with the air inlet cover plate of the core rod. The method comprises that lubrication gas with certain pressure is divided into two paths while entering the air assisted molding passage. Since stable air cushion films are formed between the mold, the core rod and the plastic melt, thereby reducing the extrusion pressure, saving the energy consumption, basically eliminating die swelling, improving precision of products, reducing material waste, shortening molding period, and saving the cost.
Description
Technical field
The present invention relates to a kind of macromolecular material contour machining equipment, particularly a kind of composite metal plastic pipe extrusion molding device and forming method thereof.
Background technology
Steel-plastics composite pipe be a kind of be wild phase with steel wire or steel plate, be matrix with high density polyethylene (HDPE), polypropylene, continuously shaped and have a two-sided anti-corrosion pipeline of premium properties on extruding production line.Its remarkable design feature is that the corrosion resistance of plastics and the high strength of steel pipe are integrated in one, and has been widely used in fields such as oil, natural gas, chemical industry, municipal administration.Existing composite metal plastic pipe extrusion molding device mainly comprises sieve aperture cover, adpting flange, wedging ring, plug, homocline cover, mouthful mould and is connected overcoat, but owing to the high viscosity and the viscoplasticity of polymer melt, has following shortcoming during the steel-plastics composite pipe moulding:
1, be prone to extrusion swelling: extrusion swelling has increased the extrusion die design difficulty, influences the multiple tube precision.
2, the internal drop of extrusion die runner is big: make and extrude the increase of multiple tube internal stress, cause distortion to increase, also increased energy consumption simultaneously.
3, extrudate blemish: the critical extruded velocity that surpasses material owing to extruded velocity makes product surface produce " turtle skin " and extrudes phenomenon such as break, and the appearance of extrudate surface quality defect has limited the raising of extruded velocity, influences production efficiency.
Above Three Difficult Issues have a strong impact on multiple tube goods precision, the restriction extruded velocity promotes, and cause extruding the energy consumption height.Produce the traditional extruding technology of having its source in of above problem and adopt non-slippage adhesion sheared edge mould extrusion way, make that mouthful die side wall is big to the resistance of melt extrusion.
Summary of the invention
For solving the problems referred to above that prior art exists, the present invention will design composite metal plastic pipe extrusion molding device and the forming method thereof that a kind of formed precision is high, extruded velocity is fast, energy consumption is low.
To achieve these goals; Technical scheme of the present invention is following: a kind of composite metal plastic pipe extrusion molding device; Comprise sieve aperture cover, adpting flange, wedging ring, plug, homocline cover, the auxilliary mouthful mould of no gas and be connected overcoat; Described adpting flange be connected overcoat and connect through bolt; Said homocline cover is positioned at the madial wall that connects overcoat, and homocline is overlapped and is connected overcoat through the bolt connection, and adpting flange is positioned at the left end of homocline cover; The madial wall of homocline cover is followed successively by sieve aperture cover, wedging ring from left to right and does not have the auxilliary mouthful mould of gas; Connect between overcoat and the homocline cover and form helical flow path, described helical flow path puts distribution through sieve aperture many rows sieve aperture and sieve aperture cover are communicated with cavity runner between the plug, and described cavity runner is communicated with gentle auxilliary mouth mould of no gas assisted molding district runner and the gas that the cavity runner between wedging ring and the plug, no gas assist between mouth mould and the plug from left to right successively and assists the cavity runner between the plug; Auxilliary mouthful of mould right-hand member of described no gas is connected with the auxilliary mouthful mould of gas, and auxilliary mouthful of mould outside of described gas is equipped with auxilliary mouthful of mould overcoat of gas, and auxilliary mouthful of mould overcoat of described gas is connected with a mouthful mould air inlet cover plate, and guarantees the sealing of gas passage through sealing ring; Described plug right-hand member is connected with the auxilliary plug of gas, and the auxilliary plug installed inside of described gas has the interior cover of plug, right-hand member to be connected with plug air inlet cover plate.The auxilliary mouthful mould of described no gas, mouthful mould air inlet cover plate, sealing ring, auxilliary mouthful of mould overcoat of gas, the auxilliary mouthful mould of gas constitute the lubricated gas gas circuit of article one, and the auxilliary mouthful mould of described no gas, the gentle auxilliary mouthful of mould of auxilliary mouthful of mould overcoat of gas form closed air chamber A; Cover, the auxilliary plug of gas, plug air inlet cover plate constitute the lubricated gas gas circuit of second in described plug, the plug, and cover, the auxilliary plug of gas form closed air chamber B in described plug, the plug.Between the auxilliary plug of described plug and gas, be connected through bolt between the auxilliary plug of gas and the plug air inlet cover plate; The material of the auxilliary mouthful of gentle auxilliary plug of mould of described gas is a porous material.
Connection overcoat of the present invention is connected through bolt with a mouthful mould air inlet cover plate.
Between the auxilliary plug of plug of the present invention and gas, be connected through bolt between the auxilliary plug of gas and the plug air inlet cover plate.
A kind of forming method of composite metal plastic pipe extrusion molding device may further comprise the steps:
A, plasticizing: fix the enhancing steel skeleton earlier; Make plastic melt begin to take shape tubular flow then through the helical flow path that connects the formation of overcoat and homocline cover; And get in the cavity runner that sieve aperture cover and plug constitute through many rows sieve aperture that sieve aperture puts distribution; Be right after in the cavity runner that gets into wedging ring and plug formation, the variation through the wedging ring cross section makes plastic melt further plastified by shear action;
B, moulding: plastic melt gets into the gas assisted molding runner through the no gas assisted molding district runner of auxilliary mouthful mould of no gas and plug formation; Lubricated gas with certain pressure gets into the gas assisted molding runner with the time-division two-way; One road gas gets into the air chamber A that is made up of mouth mould air inlet cover plate, auxilliary mouthful of mould overcoat of gas, the auxilliary mouthful mould of gas, and penetrates into by auxilliary mouthful of cavity runner that the gentle auxilliary plug of mould constitutes of gas through the auxilliary mouthful mould of gas; Another road gas gets into the air chamber B that is made up of cover in gas auxilliary plug, plug air inlet cover plate and the plug, and penetrates into by auxilliary mouthful of cavity runner that the gentle auxilliary plug of mould constitutes of gas through the auxilliary plug of gas.
Certain pressure of the present invention is 0～0.5MPa.
Lubricated gas of the present invention is compressed air.
Compared with prior art, the present invention has following beneficial effect:
1, because the present invention in extruding the steel-plastics composite pipe process, adopts auxilliary mouthful of gentle auxilliary mandrel structure of mould of gas, makes to form between a mouthful mould, plug and the plastic melt and stablize air-cushion film; Because the coefficient of friction of gas is extremely low, the air cushion rete drops to mouth mould inwall, plug outer wall minimum to the frictional resistance of melt, through the characteristic of control air-cushion film; Make extrusion molding convert the approximate non-adhesion extrusion way of complete slippage to by non-slippage adhesion extrusion way, plastic melt is piston-shaped in runner extrudes, and realizes reducing extrusion pressure; Save energy consumption, eliminate die swelling basically, improved the goods precision; Reduce waste of material, shortened molding cycle, practiced thrift cost.
2, because the present invention is regional at gas assisted molding, the auxilliary mouthful mould of gas, the auxilliary plug of gas all adopt porous material, have guaranteed the uniformity of the lubricated gas in injection moulding district, have strengthened the stability of air film.
Description of drawings
3 in the total accompanying drawing of the present invention, wherein:
Fig. 1 is the assembling sketch map of steel plastic composite pipe extrusion molding apparatus.
Fig. 2 is a gas flow sketch map between mouth mould and the plastic melt of steel plastic composite pipe extrusion molding apparatus.
Fig. 3 is a gas flow sketch map between plug and the plastic melt of steel plastic composite pipe extrusion molding apparatus.
Among the figure: 1, plug, 2, adpting flange, 3, the sieve aperture cover, 4, the homocline cover, 5, wedging ring; 6, auxilliary mouthful of mould of no gas, 7, connect overcoat, 8, mouthful mould air inlet cover plate, 9, sealing ring, 10, auxilliary mouthful of mould overcoat of gas; 11, air chamber A, 12, auxilliary mouthful of mould of gas, 13, the auxilliary plug of gas, 14, plug air inlet cover plate, 15, air chamber B; 16, cover in the plug, 17, strengthen steel skeleton, 18, plastic melt, 19, lubricated gas.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.Shown in Fig. 1-3; A kind of composite metal plastic pipe extrusion molding device; Comprise sieve aperture cover 3, adpting flange 2, wedging ring 5, plug 1, homocline cover 4, the auxilliary mouthful mould 6 of no gas and be connected overcoat 7; Adpting flange 2 be connected overcoat 7 and connect through bolt, said homocline cover 4 is positioned at the madial wall that connects overcoat 7, homocline cover 4 with is connected overcoat 7 and passes through the bolt connection; Adpting flange 2 is positioned at the left end of homocline cover 4, and the madial wall of homocline cover 4 is followed successively by sieve aperture cover 3, wedging ring 5 from left to right and does not have the auxilliary mouthful mould 6 of gas; Auxilliary mouthful of mould 6 right-hand members of described no gas are connected with the auxilliary mouthful mould 12 of gas, and auxilliary mouthful of mould 12 outsides of described gas are equipped with auxilliary mouthful of mould overcoat 10 of gas, and auxilliary mouthful of mould overcoat 10 of described gas is connected with a mouthful mould air inlet cover plate 8, and guarantees the sealing of gas passage through sealing ring 9; The auxilliary plug 13 of described plug 1 right-hand member and gas is connected, auxilliary plug 13 installed inside of described gas have overlap 16 in the plug, right-hand member is connected with plug air inlet cover plate 14.The auxilliary mouthful mould 6 of described no gas, mouthful mould air inlet cover plate 8, sealing ring 9, auxilliary mouthful of mould overcoat 10 of gas, the auxilliary mouthful mould 12 of gas constitute lubricated gas 19 gas circuits of article one, and the auxilliary mouthful mould 6 of described no gas, auxilliary mouthful of mould overcoat of gas 10 gentle auxilliary mouthful of moulds 12 form closed air chamber A11; Cover 16, the auxilliary plug 13 of gas, plug air inlet cover plate 14 constitute lubricated gas 19 gas circuits of seconds in described plug 1, the plug, and cover 16, the auxilliary plug 13 of gas form closed air chamber B15 in described plug 1, the plug.Described homocline cover 4 with is connected overcoat 7 and connects through bolt, adpting flange 2 be connected overcoat 7 and pass through the bolt connection.Described connection overcoat 7 and mouthful mould air inlet cover plate 8 are connected through bolt.Between the auxilliary plug 13 of described plug 1 and gas, be connected through bolt between the auxilliary plug 13 of gas and the plug air inlet cover plate 14.The material of auxilliary mouthful of mould 12 gentle auxilliary plugs 13 of described gas is porous materials.
A kind of forming method of composite metal plastic pipe extrusion molding device may further comprise the steps:
A, plasticizing: fix enhancing steel skeleton 17 earlier; Make plastic melt 18 begin to take shape tubular flow with the helical flow path that homocline cover 4 forms then through connecting overcoat 7; And get in the cavity runner that sieve aperture cover 3 and plug 1 constitute by the many rows sieve aperture that distributes on the sieve aperture cover 3; Be right after and get in the cavity runner that wedging ring 5 and plug 1 constitute, the variation by wedging ring 5 cross sections makes plastic melt 18 further plastified by shear action;
B, moulding: plastic melt 18 gets into the gas assisted molding runner through auxilliary mouthful mould 6 of no gas and the no gas assisted molding district runner that plug 1 constitutes; Lubricated gas 19 with certain pressure gets into the gas assisted molding runner with the time-division two-way; One road gas gets into the air chamber A11 that is made up of mouth mould air inlet cover plate 8, auxilliary mouthful of mould overcoat 10 of gas, the auxilliary mouthful mould 12 of gas, and penetrates into by auxilliary mouthful of cavity runner that mould 12 gentle auxilliary plugs 13 constitute of gas through the auxilliary mouthful mould 12 of gas; Another road gas gets into the air chamber B15 that is made up of cover 16 in gas auxilliary plug 13, plug air inlet cover plate 14 and the plug, and penetrates into by auxilliary mouthful of cavity runner that mould 12 gentle auxilliary plugs 13 constitute of gas through the auxilliary plug 13 of gas.
Certain pressure of the present invention is 0～0.5MPa.Described lubricated gas 19 is compressed air.
Claims (6)
1. composite metal plastic pipe extrusion molding device; Comprise sieve aperture cover (3), adpting flange (2), wedging ring (5), plug (1), homocline cover (4), auxilliary mouthful of mould (6) of no gas and be connected overcoat (7); Described adpting flange (2) be connected overcoat (7) and connect through bolt; Said homocline cover (4) is positioned at the madial wall that connects overcoat (7); Homocline cover (4) be connected overcoat (7) and connect through bolt; Adpting flange (2) is positioned at the left end of homocline cover (4); The madial wall of homocline cover (4) is followed successively by the auxilliary mouthful mould (6) of sieve aperture cover (3), wedging ring (5) and no gas from left to right; Connect between overcoat (7) and the homocline cover (4) and form helical flow path, described helical flow path is gone up many rows sieve aperture of distributing and sieve aperture cover (3) and is communicated with cavity runner between the plug (1) through sieve aperture cover (3), and described cavity runner is communicated with gentle auxilliary mouth mould (12) of no gas assisted molding district runner and the gas that the cavity runner between wedging ring (5) and the plug (1), no gas assist between mouth mould (6) and the plug (1) from left to right successively and assists the cavity runner between the plug;
It is characterized in that: auxilliary mouthful of mould (12) of auxilliary mouthful of mould (6) right-hand member of described no gas and gas is connected; Auxilliary mouthful of mould (12) outside of described gas is equipped with the auxilliary mouthful mould overcoat (10) of gas; Auxilliary mouthful of mould overcoat (10) of described gas is connected with a mouthful mould air inlet cover plate (8), and guarantees the sealing of gas passage through sealing ring (9); Described plug (1) right-hand member is connected with the auxilliary plug (13) of gas, and described gas is assisted plug (13) installed inside has the interior cover of plug (16), right-hand member to be connected with plug air inlet cover plate (14); The auxilliary mouthful mould (6) of described no gas, mouthful mould air inlet cover plate (8), sealing ring (9), the auxilliary mouthful mould overcoat (10) of gas, auxilliary mouthful of mould (12) of gas constitute lubricated gas (19) gas circuit of article one, and the auxilliary mouthful mould (6) of described no gas, auxilliary mouthful of gentle auxilliary mouthful of mould of mould overcoat (10) (12) of gas form closed air chamber A (11); Cover (16), the auxilliary plug (13) of gas, plug air inlet cover plate (14) constitute lubricated gas (19) gas circuit of second in described plug (1), the plug, and cover (16), the auxilliary plug (13) of gas form closed air chamber B (15) in described plug (1), the plug; The material of auxilliary mouthful of mould (12) gentle auxilliary plugs (13) of described gas is a porous material.
2. a kind of composite metal plastic pipe extrusion molding device according to claim 1 is characterized in that: described connection overcoat (7) is connected through bolt with a mouthful mould air inlet cover plate (8).
3. a kind of composite metal plastic pipe extrusion molding device according to claim 1 is characterized in that: between the auxilliary plug (13) of described plug (1) and gas, be connected through bolt between the auxilliary plug (13) of gas and the plug air inlet cover plate (14).
4. the forming method of a kind of composite metal plastic pipe extrusion molding device according to claim 1 is characterized in that: may further comprise the steps:
A, plasticizing: fix enhancing steel skeleton (17) earlier; Make plastic melt (18) begin to take shape tubular flow with the helical flow path that homocline cover (4) forms then through connecting overcoat (7); And get in the cavity runner that sieve aperture cover (3) and plug (1) constitute through many rows sieve aperture that sieve aperture cover (3) go up to distribute; Be right after and get in the cavity runner that wedging ring (5) and plug (1) constitute, the variation through wedging ring (5) cross section makes plastic melt (18) further plastified by shear action;
B, moulding: plastic melt (18) gets into the gas assisted molding runner through the no gas assisted molding district runner of auxilliary mouthful mould (6) of no gas and plug (1) formation; Lubricated gas (19) with certain pressure gets into the gas assisted molding runner with the time-division two-way; One road gas gets into by mouth mould air inlet cover plate (8), the auxilliary mouthful mould overcoat (10) of gas, auxilliary mouthful of air chamber A (11) that mould (12) constitutes of gas, and penetrates into by auxilliary mouthful of cavity runner that mould (12) gentle auxilliary plugs (13) constitute of gas through auxilliary mouthful of mould (12) of gas; Another road gas gets into the air chamber B (15) that is made up of cover (16) in the auxilliary plug (13) of gas, plug air inlet cover plate (14) and the plug, and penetrates into by auxilliary mouthful of cavity runner that mould (12) gentle auxilliary plugs (13) constitute of gas through the auxilliary plug (13) of gas.
5. the forming method of a kind of composite metal plastic pipe extrusion molding device according to claim 4, it is characterized in that: described certain pressure is 0～0.5MPa.
6. the forming method of a kind of composite metal plastic pipe extrusion molding device according to claim 4, it is characterized in that: described lubricated gas (19) is compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101491089A CN101811358B (en) | 2010-04-16 | 2010-04-16 | Composite metal plastic pipe extrusion molding device and molding method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101491089A CN101811358B (en) | 2010-04-16 | 2010-04-16 | Composite metal plastic pipe extrusion molding device and molding method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101811358A CN101811358A (en) | 2010-08-25 |
| CN101811358B true CN101811358B (en) | 2012-09-12 |
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| CN2010101491089A Expired - Fee Related CN101811358B (en) | 2010-04-16 | 2010-04-16 | Composite metal plastic pipe extrusion molding device and molding method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103568241A (en) * | 2012-08-10 | 2014-02-12 | 宁波康润机械科技有限公司 | Composite tube molding extrusion equipment and method |
| CN104943122B (en) * | 2015-05-04 | 2017-01-04 | 柳和生 | Gas auxiliary mouth die assembly |
| CN110421819A (en) * | 2019-07-23 | 2019-11-08 | 南昌大学 | A kind of wire and cable clad extrusion die and method |
| CN114193805B (en) * | 2021-12-10 | 2023-03-21 | 公元股份有限公司 | Forming equipment of continuous fiber reinforced composite pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4578024A (en) * | 1985-02-22 | 1986-03-25 | The Firestone Tire & Rubber Company | Coextrusion apparatus |
| CN1433881A (en) * | 2002-01-19 | 2003-08-06 | 汪兆钧 | Steel-plastics combined pipe extrusion mould head using hole-penetrated steel pipe as frame |
| CN201685428U (en) * | 2010-04-16 | 2010-12-29 | 大连海事大学 | Extrusion molding device for plastic-steel composite pipes |
-
2010
- 2010-04-16 CN CN2010101491089A patent/CN101811358B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4578024A (en) * | 1985-02-22 | 1986-03-25 | The Firestone Tire & Rubber Company | Coextrusion apparatus |
| CN1433881A (en) * | 2002-01-19 | 2003-08-06 | 汪兆钧 | Steel-plastics combined pipe extrusion mould head using hole-penetrated steel pipe as frame |
| CN201685428U (en) * | 2010-04-16 | 2010-12-29 | 大连海事大学 | Extrusion molding device for plastic-steel composite pipes |
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| CN101811358A (en) | 2010-08-25 |
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