CN102085719A - Device for molding special temperature-resistant, pressure-resistant and bidirectional self-strengthening plastic pipe for oil treatment - Google Patents
Device for molding special temperature-resistant, pressure-resistant and bidirectional self-strengthening plastic pipe for oil treatment Download PDFInfo
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- CN102085719A CN102085719A CN2009101917801A CN200910191780A CN102085719A CN 102085719 A CN102085719 A CN 102085719A CN 2009101917801 A CN2009101917801 A CN 2009101917801A CN 200910191780 A CN200910191780 A CN 200910191780A CN 102085719 A CN102085719 A CN 102085719A
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- Prior art keywords
- stress field
- generating means
- pipe
- pipes
- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
- B29C48/9185—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling in the direction of the stream of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a device for producing and manufacturing various pipes, which is characterized in that the molding device has a temperature gradient field generating device capable of controlling temperature by segments and a shearing-stretching combined stress field generating device, and can realize a temperature gradient field and hearing-stretching two-way combined stress field coupled pipe extruding and molding process. When the device provided by the invention is used for producing the plastic pipes, the strength and the modulus of the pipes are strengthened in the axial and circumferential directions, so the material performance is optimized, and the satisfaction degree of the requirement of the internally stressed pipes on the material performance is improved. After being strengthened, the orientation degree of the pipes in the axial and circumferential directions is higher than the regular pipes, and the crystal plate of the strengthened pipe is thicker, the degree of crystallization is higher, and the temperature resistance is also improved in comparison with the regular pipe, the strengthened pipe is particularly suitable to be used as the special pipe for oil treatment. The device provided by the invention is small in investment and low in production cost and has high product performance and a good industrial prospect.
Description
Technical field:
Present technique relates to the former that various plastic pipe products are manufactured, and especially relates to the special-purpose heat resisting and pressure resisting plastic pipe of oil processing is upwards realized self-reinforcing in its week extrusion equipment.
Background technology:
In the waste oil recycling and the process of re-refining, the pipeline of delivering oil not only needs to bear corrosion, but also often needs to bear certain pressure and temperature.But plastic pipe is plastic products after all, its stiffness and strength and heat resistance etc. are all far away from cast iron pipe, in order to satisfy the application in the waste oil recycling and the process of re-refining, just need to improve the compressive resistance and the heat resistance of plastic pipe, as adopt commonsense method to improve the wall thickness that its intensity just must increase tubing, but wall thickness has brought again by nonuniform heating or cooling after increasing, during solid-state phase changes with Volume Changes, the additional internal stress that factors such as the difference of each several part deformation extent and contraction obstruction cause, these additional internal stress will be through making the force-bearing situation of tubing worsen more after the stack.Therefore rely on the method that increases tube wall thickness will cause the internal stress of tubing to produce more disadvantageous synergistic effect merely, and the degradation factor also make the wall thickness of tubing not thicken arbitrarily under the economic benefit that causes because wall thickness increase materials increase.And conventional at present plastic pipe extrusion equipment device also can't overcome the predicament of so facing a difficult choice.Though also developed the shaped device of many self-reinforced plastic pipes in recent years, but since self-reinforced structure by these tubing of being obtained of device and effect again because it is in higher temperature environment a large amount of fusions reply and disappear, thereby to improve effect be not obvious especially all the time.
Summary of the invention:
The objective of the invention is to overcome tubing that the plastic pipe extrusion equipment device of present routine produced and can't satisfy not only thin-walled, low-cost but also have a deficiency of higher stiffness and heat resistance etc. simultaneously, particularly the new method that is occurred in recent years can't be retained the deficiency of self-reinforced structure and effect in a large number, provides a kind of can and the interpolation at same wall thickness to promote tubing axle circumferential strength and heat resistance under the prerequisite of any other reinforcing agent simultaneously significantly and these are improved the extrusion equipment device that effect remains.
The object of the present invention is achieved like this: in order to promote tubing circumferential and axial intensity simultaneously, and don't increase its wall thickness and add other any reinforcing agents, then special a kind of temperature gradient field of design and shear tension combined stress field coupling extruded bidirectional self-reinforcing tube forming device, utilize the temperature gradient field of this device and the coupling of shear tension combined stress field in the extrusion molding process, to form along the big molecule of tubing circumferential and axial oriented crystalline, the high-performance condensed state structure of polymer such as shish-kebab and shish-kebab interlocking, and these high-performance condensed state structures are resided in the heterogeneous microstructure of final products.Be characterized in whole forming process is applied the temperature gradient field of a sectional temperature control and the tubing of extrusion molding applied the two-way combined stress field of circumferential shearing and axial tension, make microstructures such as polymer macromolecule and macromolecular chain under this influence of circumferentially shearing the two-way combined stress of axial tension field drives, form big molecule along tubing circumferential and axial oriented crystalline, the high-performance condensed state structure of polymer such as shish-kebab and shish-kebab interlocking, the sectional temperature-controlled function of the utilizing temperature gradient field simultaneously temperature after with two-way enhancing profiled section is controlled at and makes the big molecule along tubing circumferential and axial oriented crystalline that is obtained in the solid plastics temperature environment that is lower than under the melting temperature, the high-performance condensed state structure of polymer such as shish-kebab and shish-kebab interlocking resides in the heterogeneous microstructure of goods.Its processing step is:
---raw-material dehumidifying baking material
---raw material add the extruder plasticizing
---molten plastic is extruded through extruder
---plastic pipe is realized extruded bidirectional self-reinforcing moulding under temperature gradient field and the field coupling of shear tension combined stress
---cooling and shaping
---cutting is collected
Apparatus of the present invention the mechanism of the two-way self-reinforcing of tubing is achieved in that allow plastic material in the process of extrusion molding plastic pipe by the two-way combined stress of a shear tension field, this combined stress field is produced and control and regulation by a special crowded pipe unit, and this device is in the temperature gradient field of a sectional temperature control always.In the extrusion molding process of plastic pipe, molten plastic passes through the shear stress field and the trending extensional tectonic stress field of this device successively, when melt-flow during through circumferential shear stress field, the shearing rotation inducing action of rotating guide owing to the shearing in this stress field produces linear nucleus---fibril, linear nucleus is constantly grown, is orientated, is arranged in order under the continuation effect of shear-induced and finishes first oriented crystalline process, and forms big molecule, shish-kebab and the shish-kebab interlocking structure of first oriented crystalline.Big molecule when these first oriented crystallines, when the big molecule of shish-kebab and shish-kebab interlocking structure and polymer and macromolecular chain are flowed through the trending extensional tectonic stress field that is produced by the stretching astringent runner between mouth mould and the plug subsequently, the big molecule of first oriented crystalline, the big molecule of shish-kebab and shish-kebab interlocking structure and polymer and macromolecular chain are again along the trending extensional tectonic stress field oriented crystalline, the polymer macromolecule of the not first oriented crystalline of part and the big molecule that macromolecular chain has just formed the first oriented crystalline consistent with tensile stress field direction (being the axial direction of tubing), shish-kebab and shish-kebab interlocking structure, and the big molecule of oriented crystalline for the first time, the big molecule of shish-kebab and shish-kebab interlocking structure and polymer and macromolecular chain under the effect of trending extensional tectonic stress field, formed neither along tubing axially also not along the circumferential oblique arrangement structure of tubing, and these structures form a large amount of secondary oriented crystalline structures owing to the effect in stretching outfield and then the oriented crystalline that carrying out the degree of depth in the process of evolution.Sectional temperature-controlled function by temperature gradient field just remains the formation in a single day of these structures crystallization fusion and the orientation answer of having avoided under the condition of high temperature in polymer pipe simultaneously.They still impel the axial and circumferential performance of tubing to obtain to strengthen improvement along the axial or circumferential oriented crystalline structure of tubing with what remain through same principle jointly.Apparatus of the present invention that Here it is can make polymer pipe obtain the mechanism of the two-way self-reinforcing of axial and circumferential.
The principle that apparatus of the present invention strengthen properties of product with the oriented crystalline structure of polymer macromolecule is applied to the manufacturing industry of plastic pipe and the sectional temperature-controlled function by temperature gradient field is kept these performances, therefore, the plastic pipe that utilizes apparatus of the present invention to produce, the intensity of tubing and modulus all can obviously obtain the two-way enhancing on the axial and circumferential, have greatly promoted to satisfy to be subjected to the current demand of interior pressure pipe material to material property.The wafer thickness of tubing is thicker after strengthening, and degree of crystallinity is higher, thereby the also more conventional tubing of its heat resistance improves significantly, and is especially suitable for use as to be the oil processing pipe special.The present device small investment, cost of material is low, and producing cost is cheap and product properties is good, has the good industrialized prospect.
Description of drawings:
Fig. 1 is temperature gradient field of the present invention and the crowded pipe unit structural principle schematic diagram of shear tension combined stress field coupling
The microcosmic molecular structure model schematic diagram of the two-way self-reinforcing tubing inside that Fig. 2 produces for apparatus of the present invention
Among the figure:
1. mouthful mould is 2. sheared turnbarrel, 3. plug, 4. molten plastic, 5. temperature control and regulation device, 6. oriented crystalline shish-kebab interlocking structure, 7. oriented crystalline shish-kebab structure, the 8. big molecule of oriented crystalline.
I. die temperature I section, II. die temperature II section, III. die temperature III section, IV. die temperature IV section.
A. plastics molten condition A, B. plastics molten condition B, C. plastics molten condition C, D. plastics molten condition D.
A. shear stress field section, b. trending extensional tectonic stress field section, c. cooling and shaping section.
Specific embodiment:
Before squeezing pipe production, temperature section control and regulation function by temperature control and regulation device 5 will the crowded pipe unit in whole two-way combined stress field the die temperature segmentation to be controlled to be die temperature I section be on the melting temperature, die temperature II section is on the melting temperature+5 ℃ of sections, die temperature III section is melting temperature-5 a ℃ section, die temperature IV section is after the solid plastics section under the melting temperature, then the state of each section of plastic melt is in Zhuan Zhi the temperature stabilization deutostoma mould: A is the molten state plastics, B is the molten state plastics, C is the semisolid plastics, and D is a solid plastics.Open extruder and extrude molten plastic 4, molten plastic 4 has been cooled to semisolid plastic melt C when flowing through trending extensional tectonic stress field section b.When molten plastic 4 is flowed through the circumferential shear stress field section a of plug 3, owing to the shearing rotation inducing action of shearing turnbarrel 2 makes molten plastic 4 produce linear nucleus---fibril, linear nucleus is constantly grown, is orientated, is arranged in order under the continuation effect of the shear-induced of shearing turnbarrel 2 and finishes first oriented crystalline process, and forms big molecule 8, shish-kebab 7 and the shish-kebab interlocking structure 6 of first oriented crystalline.When the big molecule of big molecule 8, shish-kebab 7 and the shish-kebab interlocking structure 6 and the polymer of these first oriented crystallines and macromolecular chain are flowed through the trending extensional tectonic stress field section b of plug 3 subsequently, promptly formed neither along tubing axially also not along the structure of the circumferential oblique arrangement of tubing, and these structures are carrying out the oriented crystalline of the degree of depth and are forming secondary oriented crystalline shish-kebab interlocking structure 6 in a large number in the process of evolution.Simultaneously because these shish-kebab interlocking structures 6 just enter after forming in the solid plastics temperature environment of mouth mould IV section of section under the melting temperature immediately, thereby these structures in case form just remain the axial and circumferential performances of impelling tubing in a large number and obtain to strengthen and improve in polymer pipe.
Claims (6)
1. the shaped device of the special-purpose heat resisting and pressure resisting plastic tubes for biaxial self-reinforcement of oil processing is characterized in that this shaped device contains two generating means of temperature gradient field and shear tension combined stress field.
2. the shaped device of the special-purpose heat resisting and pressure resisting plastic tubes for biaxial self-reinforcement of a kind of oil processing according to claim 1 is characterized in that the temperature gradient field generating means of this device mainly comprises the temperature control and regulation device that can realize sectional temperature-controlled function.
3. the shaped device of the special-purpose heat resisting and pressure resisting plastic tubes for biaxial self-reinforcement of a kind of oil processing according to claim 1 is characterized in that the shear tension combined stress field generating means of this device contains a circumferential shear stress field generating means.
4. the shaped device of the special-purpose heat resisting and pressure resisting plastic tubes for biaxial self-reinforcement of a kind of oil processing according to claim 1, the shear tension combined stress field generating means that it is characterized in that this device contain an axial tensile stress field generating means that is next to after its circumferential shear stress field generating means.
5. the shaped device of the special-purpose heat resisting and pressure resisting plastic tubes for biaxial self-reinforcement of a kind of oil processing according to claim 3, it is characterized in that in the circumferential shear stress field generating means of this device, be provided with a sleeve that can rotate in a circumferential direction shearing and induce the circumferential shear stress field of generation.
6. the shaped device of the special-purpose heat resisting and pressure resisting plastic tubes for biaxial self-reinforcement of a kind of oil processing according to claim 4, it is characterized in that in the generating means of the axial tensile stress field of this device, be provided with one and produce the axial astringent runner of axial tensile stress field by the convergence of the stretching between plug and mouthful mould inducing action that flows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101917801A CN102085719A (en) | 2009-12-07 | 2009-12-07 | Device for molding special temperature-resistant, pressure-resistant and bidirectional self-strengthening plastic pipe for oil treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101917801A CN102085719A (en) | 2009-12-07 | 2009-12-07 | Device for molding special temperature-resistant, pressure-resistant and bidirectional self-strengthening plastic pipe for oil treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102085719A true CN102085719A (en) | 2011-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101917801A Pending CN102085719A (en) | 2009-12-07 | 2009-12-07 | Device for molding special temperature-resistant, pressure-resistant and bidirectional self-strengthening plastic pipe for oil treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102085719A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273352A (en) * | 2016-08-29 | 2017-01-04 | 武汉金牛经济发展有限公司 | The preparation method of a kind of inbred group breeding (PPESK) tubing and device |
| CN108527817A (en) * | 2018-04-13 | 2018-09-14 | 安徽恒森新材料有限公司 | A kind of differential method crystallization enhancing PP material cortex intensity methods |
-
2009
- 2009-12-07 CN CN2009101917801A patent/CN102085719A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273352A (en) * | 2016-08-29 | 2017-01-04 | 武汉金牛经济发展有限公司 | The preparation method of a kind of inbred group breeding (PPESK) tubing and device |
| CN108527817A (en) * | 2018-04-13 | 2018-09-14 | 安徽恒森新材料有限公司 | A kind of differential method crystallization enhancing PP material cortex intensity methods |
| CN108527817B (en) * | 2018-04-13 | 2021-01-15 | 安徽恒森新材料有限公司 | Method for enhancing strength of PP material cortex through differential crystallization |
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Application publication date: 20110608 |