CN102653129A - Pressure adjusting method and device of handpiece of screw extruder - Google Patents
Pressure adjusting method and device of handpiece of screw extruder Download PDFInfo
- Publication number
- CN102653129A CN102653129A CN2012101581417A CN201210158141A CN102653129A CN 102653129 A CN102653129 A CN 102653129A CN 2012101581417 A CN2012101581417 A CN 2012101581417A CN 201210158141 A CN201210158141 A CN 201210158141A CN 102653129 A CN102653129 A CN 102653129A
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- CN
- China
- Prior art keywords
- porous plate
- screw extruder
- head pressure
- slip
- handpiece
- 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.)
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Classifications
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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
- B29C48/36—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
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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
- B29C48/36—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a pressure adjusting method and a device of a handpiece of a screw extruder. The pressure adjusting method comprises the following steps of: arranging two overlapped porous plates between a machine barrel and an opening mould, wherein one porous plate is fixed and the other is slidable, and holes in the two overlapped porous plates are overlapped and penetrated to form a smelted body channel; and moving the slidable porous plate, so that an overlapping position between the slidable porous plate and the fixed porous plate is changed, the area of the smelted body channel formed by penetrating through the holes is changed, and thus the resistance for a smelted body to pass through is changed. According to the pressure adjusting method and the device of the handpiece of the screw extruder, online real-time adjustment of a pressure of the handpiece of the screw extruder can be realized, the performance of a polymer commixed modified material is improved and the cost is reduced.
Description
Technical field
The present invention relates to the materials processing technology field, specifically come just to relate to a kind of control method of screw extruder head pressure, also relate to the adjusting device of this screw extruder head pressure simultaneously.
Background technology
Typical polymer blending modification material Merlon (the PC)/ABS alloy that is widely used in all trades and professions; Utilize the good toughness of PC, rigidity and hear resistance; Have complementary advantages with ABS good processing properties, comprehensive mechanical property, cheap reaching with the limited compatibility formation of PC; And aspect impact flexibility, produce synergy, but full-bodied PC in often need adopting, and the PC mass content surpasses 60%; Alloy material could obtain excellent mechanical property, otherwise the impact flexibility of material significantly reduces.This has brought certain difficulty for the processing of injection-molded item, and be difficult to the complicated goods of shaping form, and be difficult to further reduce material cost,
Screw extruder is the common equipment that is used for the polymeric material blending and modifying, and the intense shear effect that under molten condition, relies on screw rod to provide evenly mixes each component; And under the effect of mechanical force; Improve the compatibility of component, under the prerequisite that possesses certain compatibility between the component, shear action is strong more; The decentralized photo particle diameter is more little, and the amplitude that performance improves is big more.But excessive shearing also can make the overheated generation degraded of component, decomposition or oxidation; And performance is had a negative impact, so the control of shear strength is very important, shear strength mainly receives the influence that head pressure, screwing element combination, temperature setting, component viscosity, material mixture ratio, screw speed, blanking amount, extruding dies place are extruded factors such as bar aperture area; Wherein the adjustment of screwing element combination is time-consuming; The adjustment of temperature be prone to produce than great fluctuation process and response slowly, and screw speed, blanking amount all influence production efficiency, and these means to the adjustment effect of shear strength because the interaction of numerous factors; Requirement to technology is very high; Be difficult to fully up to expectationsly, the online adjustment difficulty that mouthful mould place extrudes the bar aperture area is very big, is difficult to adapt to suitability for industrialized production.
Summary of the invention
The control method of the screw extruder head pressure that the objective of the invention is to regulate for a kind of online in real time that can realize the screw extruder head pressure that overcomes that above-mentioned shortcoming provides,
Another object of the present invention is to provide the adjusting device of this screw extruder head pressure.
The control method of the head pressure of a kind of screw extruder of the present invention may further comprise the steps:
(1) porous plate of two stacks is set between machine barrel and mouthful mould, fixing, a slip, stack runs through and forms the melt canal between the hole on the two porous plates;
(2) slip porous plate motion, its with the hole of fixing porous plate between the position that superposes change, the melt canal area that runs through formation between the hole changes thereupon, thereby changes the resistance that melt passes through, and reaches the purpose of adjusting head pressure.
A kind of adjusting device of screw extruder head pressure comprises fixedly porous plate, slip porous plate, and wherein: the slip porous plate is at pressing plate and fixedly between the porous plate, and with fixedly porous plate (1) stack, the slip porous plate is connected with drive unit.
The adjusting device of the head pressure of above-mentioned a kind of screw extruder, wherein: slip porous plate two ends up and down is provided with back-up block and following back-up block.
The adjusting device of the head pressure of above-mentioned a kind of screw extruder, wherein: drive unit adopts oil cylinder or screw mandrel.
The present invention compared with prior art; Has tangible beneficial effect; Can know from above scheme: adopt fixedly porous plate and the stack of slip porous plate; Be installed in the screw extruder runner, become the connecting link between machine barrel and mouthful mould, melt flows to the screw extruder outlet through numerous holes that run through of two porous plates.Pressing plate, fixedly porous plate, back-up block constitutes slideway up and down; The slip porous plate moves along slideway; Itself and the position that fixedly superposes between the hole of porous plate change; The orifice flow that runs through the melt canal area of formation between the hole changes to outlet of extruder thereupon, thereby changes the resistance that melt passes through, and plays the effect of adjusting screw(rod) cross-head pressure.Porous plate slides in slideway, can adopt oil cylinder or screw mandrel to drive, and stop also can be set limit its sliding position and limit its maximal regulated amount.Show the head actual pressure at the head adopts pressure sensor, can form closed-loop system and realize regulating automatically.According to head pressure and the shear strength relation of being proportionate; Rapid adjustment through head pressure can effectively be controlled shear strength; Material to different viscositys, different thermal sensitivitys carries out the head pressure regulation and control, plays and improves blending modified material performance, the purpose of stabilizing material quality.
Description of drawings
Fig. 1 is the structural representation of adjusting device of the head pressure of screw extruder;
Fig. 2 is the A-A cutaway view of Fig. 1;
Sketch map when Fig. 3 is hole aperture area maximum;
Sketch map when Fig. 4 reduces for the hole aperture area;
Fig. 5 is the user mode figure of adjusting device of the head pressure of screw extruder.
Mark among the figure: 1, fixing porous plate; 2, slip porous plate; 3, pressing plate; 4, drive unit; 5, go up back-up block; 6, following back-up block.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to be elaborated according to the specific embodiment of the present invention, characteristic and effect thereof as after.
Referring to Fig. 1-2, the adjusting device of screw extruder head pressure comprises fixedly porous plate 1, slip porous plate 2, and wherein: slip porous plate 2 is at pressing plate 3 and fixedly between the porous plate 1, and with fixedly porous plate 1 stack, slip porous plate 2 is connected with drive unit 4.Drive unit 4 adopts oil cylinder or screw mandrel.The slip porous plate is provided with back-up block 5 and following back-up block 6 in two ends about in the of 2.
Referring to Fig. 5, a kind of control method of head pressure of screw extruder may further comprise the steps:
(1) porous plate of two stacks is set between machine barrel and mouthful mould, fixing, a slip, stack runs through and forms the melt canal between the hole on the two porous plates;
(2) slip porous plate motion, its with the hole of fixing porous plate between the position that superposes change, the melt canal area that runs through formation between the hole changes thereupon, thus the resistance that the change melt passes through.Fixedly porous plate overlaps with numerous perforated holes of porous plate slidably fully, is in when overlapping the position the fixing aperture area of porous plate hole maximum (referring to Fig. 3), melt head pressure minimum; When the slip porous plate slides, when fixedly porous plate produced dislocation, the aperture area of porous plate hole reduced (referring to Fig. 4), and the resistance that melt passes through increases, and the melt head pressure increases.
Experimental example
Below adopt in the Φ 40 prepared in twin-screw extruder PC/ABS alloys through this device is applied in, proportioning and the viscosity of observing head pressure, PC component are to effect of material performance (PC that all adopts Bayer to produce).
Wherein: the head pressure that does not carry out under the head pressure adjusting situation is the head pressure that nature forms, and carries out the head pressure of head pressure for regulating by predetermined target value under the head pressure adjusting situation.
Experimental result: can find out from above two tables,, increase shear strength, improve melting effect, adopt the PC of low-viscosity also can obtain good impact flexibility to improve the mode of screw extruder head pressure.In addition, can in the proportioning that reduces PC, obtain good impact flexibility, material cost is significantly reduced.Therefore through the control of head pressure, play a multiplier effect, reach the purpose that improves material property, reduces cost.
Claims (4)
1. the control method of the head pressure of a screw extruder may further comprise the steps:
(1) porous plate of two stacks is set between machine barrel and mouthful mould, fixing, a slip, stack runs through and forms the melt canal between the hole on the two porous plates;
(2) slip porous plate motion, its with the hole of fixing porous plate between the position that superposes change, the melt canal area that runs through formation between the hole changes thereupon, thus the resistance that the change melt passes through.
2. the adjusting device of a screw extruder head pressure; It is characterized in that: comprise fixedly porous plate (1), slip porous plate (2); It is characterized in that: slip porous plate (2) is positioned at pressing plate (3) and fixedly between the porous plate (1); With fixedly porous plate (1) stack, slip porous plate (2) is connected with drive unit (4).
3. the adjusting device of the head pressure of screw extruder as claimed in claim 2, it is characterized in that: slip porous plate (2) two ends up and down is provided with back-up block (5) and following back-up block (6).
4. like the adjusting device of the head pressure of claim 2 or 3 described screw extruders, it is characterized in that: drive unit (4) adopts oil cylinder or screw mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101581417A CN102653129A (en) | 2012-05-21 | 2012-05-21 | Pressure adjusting method and device of handpiece of screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101581417A CN102653129A (en) | 2012-05-21 | 2012-05-21 | Pressure adjusting method and device of handpiece of screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102653129A true CN102653129A (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101581417A Pending CN102653129A (en) | 2012-05-21 | 2012-05-21 | Pressure adjusting method and device of handpiece of screw extruder |
Country Status (1)
| Country | Link |
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| CN (1) | CN102653129A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716679A (en) * | 2019-03-20 | 2020-09-29 | 诺信公司 | Die assembly and granulation device with pressure regulating device |
| CN113752409A (en) * | 2021-08-16 | 2021-12-07 | 倪豆豆 | Plastic master batch forming machine |
| CN116373255A (en) * | 2023-06-05 | 2023-07-04 | 四川众鑫盛农牧机械有限公司 | Pressure regulating valve group for screw extrusion mechanism and pressure regulating valve thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527429Y (en) * | 2002-02-08 | 2002-12-25 | 刘兆庆 | Extrusion moulding plastic multi hole plate machine head |
| WO2005046963A1 (en) * | 2003-11-12 | 2005-05-26 | Lg Cable Ltd. | Circular slit-type breaker plate assembly for use in extruder |
| CN101142012A (en) * | 2005-07-26 | 2008-03-12 | 川崎成套设备股份有限公司 | Mixed fluid uniformization device and mixed fluid feeding apparatus |
| CN102036801A (en) * | 2008-05-26 | 2011-04-27 | Wpc株式会社 | Extrusion apparatus |
-
2012
- 2012-05-21 CN CN2012101581417A patent/CN102653129A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527429Y (en) * | 2002-02-08 | 2002-12-25 | 刘兆庆 | Extrusion moulding plastic multi hole plate machine head |
| WO2005046963A1 (en) * | 2003-11-12 | 2005-05-26 | Lg Cable Ltd. | Circular slit-type breaker plate assembly for use in extruder |
| CN101142012A (en) * | 2005-07-26 | 2008-03-12 | 川崎成套设备股份有限公司 | Mixed fluid uniformization device and mixed fluid feeding apparatus |
| CN102036801A (en) * | 2008-05-26 | 2011-04-27 | Wpc株式会社 | Extrusion apparatus |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716679A (en) * | 2019-03-20 | 2020-09-29 | 诺信公司 | Die assembly and granulation device with pressure regulating device |
| US11858176B2 (en) | 2019-03-20 | 2024-01-02 | Nordson Corporation | Die assembly with pressure regulating device, and a pelletizing apparatus |
| CN113752409A (en) * | 2021-08-16 | 2021-12-07 | 倪豆豆 | Plastic master batch forming machine |
| CN113752409B (en) * | 2021-08-16 | 2023-12-12 | 海丰县小山塑胶实业有限公司 | Plastic master batch forming machine |
| CN116373255A (en) * | 2023-06-05 | 2023-07-04 | 四川众鑫盛农牧机械有限公司 | Pressure regulating valve group for screw extrusion mechanism and pressure regulating valve thereof |
| CN116373255B (en) * | 2023-06-05 | 2023-08-25 | 四川众鑫盛农牧机械有限公司 | Pressure regulating valve group for screw extrusion mechanism and pressure regulating valve thereof |
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Application publication date: 20120905 |