CN203705302U - Double-charging barrel capillary rheometer - Google Patents
Double-charging barrel capillary rheometer Download PDFInfo
- Publication number
- CN203705302U CN203705302U CN201420060707.7U CN201420060707U CN203705302U CN 203705302 U CN203705302 U CN 203705302U CN 201420060707 U CN201420060707 U CN 201420060707U CN 203705302 U CN203705302 U CN 203705302U
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- Prior art keywords
- capillary
- barrels
- rheometer
- double
- fluid
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- Expired - Fee Related
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- 239000000463 material Substances 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 14
- 229920000642 polymer Polymers 0.000 abstract description 2
- 238000000518 rheometry Methods 0.000 abstract description 2
- 229920002521 macromolecule Polymers 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a double-charging barrel capillary rheometer, and belongs to the technical field of high polymer rheology testing. Double capillary opening moulds as core parts of the rheometer are designed into a long capillary opening mould and a short capillary opening mould so as to change the design of a zero-length capillary opening mould of the conventional common double-charging barrel capillary rheometer. According to the double-charging barrel capillary rheometer, plungers are driven and controlled by a servo motor and a lead screw to squeeze macromolecule fluid inside two charging barrels with the same inner diameter at the same speed, then the macromolecule fluid inside the two charging barrels enters two parallel capillaries with the same inner diameter and outer diameter and different lengths, the pressures of the macromolecule fluid in the two capillaries are respectively measured by pressure sensors, the pressure drop of the fluid flowing through the inlet and the outlet of each capillary can be conveniently eliminated after the subtraction of pressures; besides, compared with fluid in a zero-length capillary, the fluid in the short capillary opening mould with a certain length has a completely development and flowing area with a certain length, and the flowing situations of the fluid in the long and short capillaries are more similar, so that the finally measured pressure drop is more accurate, and closer to the actual situation.
Description
Technical field
The utility model belongs to superpolymer rheology technical field of measurement and test, especially a kind of Double Die Capillary Rheometer.
Background technology
Rheological property is the important performance of superpolymer, the processing of the quality of rheological property on superpolymer and be prepared with important impact, thereby the rheological data of Accurate Determining superpolymer is most crucial.Capillary rheometer is one of key instrument of measuring rheological property, it is by measuring the changing value of shear viscosity with various Polymer Structure parameters (as molecular weight, molecular weight distribution, cladodification degree) and flow field parameter (as shear rate, temperature, pressure), set up the quantitative relation formula between them, obtain theoretical model and and guide actual production.Because thin material cylinder capillary rheometer exists very large entrance pressure drop, need to adopt loaded down with trivial details Bagley to proofread and correct, at present general capillary rheometer is Double Die Capillary Rheometer in the world, can eliminate well entrance pressure drop, and can be able to predict preferably the draft flowing deformation performance of material.But what at present nearly all Double Die Capillary Rheometer adopted is distance of zero mark capillary die, and fluid in distance of zero mark kapillary does not have complete developing flow district, due to the viscoelasticity feature of superpolymer fluid, the elasticity of fluid is larger what reply after distance of zero mark kapillary, and after long capillary, reply less, cause thus distance of zero mark top hole pressure capillaceous to fall with the top hole pressure of long capillary and fall and have larger difference, cause measurement result and actual conditions to have certain gap.
Utility model content
The purpose of this utility model is the deficiency for existing instrument, and a kind of Double Die Capillary Rheometer is provided, and critical piece has portable plate, two barrels, two plungers, long and short two capillary and temperature and pressure sensors; Described two plungers are enclosed within respectively in two barrels, and described long capillary and short capillary lay respectively at the bottom of two barrels, and described temperature and pressure sensor is two, lays respectively at top capillaceous, and concordant with the inwall of two barrels respectively.Wherein portable plate upper end is connected with servomotor, two barrels are around heated at constant temperature sleeves, become melt for adding thermal material, and two plungers are vertically fixed on portable plate, the Length Ratio of long capillary and short capillary is 3/2～4/1, die entrance angle 10～50 capillaceous.This flow graph is driven and is controlled plunger with the polymeric fluid in the identical barrel of identical two internal diameters of speed extruding by servomotor and leading screw, then enter two parallel capillary tubes that inside and outside footpath is identical, length is different, by respectively gaging pressure of pressure transducer, the eliminate fluid entrance and exit Pressure Drop capillaceous of flowing through easily after pressure subtracts each other; Simultaneously with respect to distance of zero mark kapillary, there is the complete developing flow district that fluid in the short capillary mouth mould of certain length possesses certain length, the mobility status of fluid in long and short two kapillaries is more close, makes the Pressure Drop that finally records more accurate, more approaches actual conditions.
Brief description of the drawings
By describing in more detail exemplary embodiment of the present utility model with reference to accompanying drawing, above and other aspect of the present utility model and advantage will become more and be readily clear of, in the accompanying drawings:
Fig. 1 is the structural representation of this Double Die Capillary Rheometer.
In figure: 1. portable plate, 2. barrel, 3. plunger, 4. long capillary, 5. kapillary back up pad, 6. plunger rod, 7. thermal insulation board, 8. barrel back up pad, 9. short capillary, 10. temperature and pressure sensor, 11. capillary conduit saddles.
Fig. 2 is the cut-open view of these Double Die Capillary Rheometer two capillaries.
Embodiment
Hereinafter, now with reference to accompanying drawing, the utility model is described more fully, various embodiment shown in the drawings.But the utility model can be implemented in many different forms, and should not be interpreted as being confined to embodiment set forth herein.On the contrary, it will be thorough with completely providing these embodiment to make the disclosure, and scope of the present utility model is conveyed to those skilled in the art fully.
Hereinafter, exemplary embodiment of the present utility model is described with reference to the accompanying drawings in more detail.
With reference to accompanying drawing 1, first add appropriate material to two barrels, heating muff heating cylinder makes material melting, driven and controlled plunger with certain speed pressing materials by servomotor leading screw, material enters kapillary and flows out, the data such as temperature, pressure under temperature and pressure sensor record, test finishes, wherein long capillary length is 20mm, and short capillary length is 10mm, and the diameter of two capillary mouth moulds is 1mm.
The foregoing is only embodiment of the present utility model, be not limited to the utility model.The utility model can have various suitable changes and variation.All any amendments of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.
Claims (7)
1. a Double Die Capillary Rheometer, is characterized in that: critical piece has portable plate (1), two barrels (2), two plungers (3), long capillary (4), kapillary back up pad (5), plunger rod (6), thermal insulation board (7), barrel back up pad (8), short capillary (9), temperature and pressure sensor (10) and capillary conduit saddle (11); Described two plungers are enclosed within respectively in two barrels, and described long capillary and short capillary lay respectively at the bottom of two barrels, and described temperature and pressure sensor is two, lays respectively at top capillaceous, and concordant with the inwall of two barrels respectively; Wherein portable plate upper end is connected with servomotor, and two barrels are around heated at constant temperature sleeves, become melt for adding thermal material, and two plungers are vertically fixed on portable plate.
2. Double Die Capillary Rheometer as claimed in claim 1, is characterized in that: described portable plate (1) upper end is connected with servomotor.
3. Double Die Capillary Rheometer as claimed in claim 1, is characterized in that: described two barrels (2) are around heated at constant temperature sleeves, become melt for adding thermal material.
4. Double Die Capillary Rheometer as claimed in claim 1, it is characterized in that: it is upper that described two plungers (3) are vertically fixed on portable plate (1) by plunger rod (6), and wherein the size of plunger coordinates with the internal diameter of two barrels.
5. Double Die Capillary Rheometer as claimed in claim 1, is characterized in that: described long capillary (4) is 3/2～4/1 with the Length Ratio of short capillary (9).
6. Double Die Capillary Rheometer as claimed in claim 1, is characterized in that: described die entrance angle capillaceous 10～50.
7. Double Die Capillary Rheometer as claimed in claim 1, it is characterized in that: described capillary conduit saddle (11) coordinates with kapillary back up pad (5) by external thread, in the middle of capillary conduit saddle (11), there is regular hexagon through hole, wherein the external diameter of capillary conduit saddle (11) is greater than external diameter capillaceous, and regular hexagon shape of through holes is less than kapillary external diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060707.7U CN203705302U (en) | 2014-02-10 | 2014-02-10 | Double-charging barrel capillary rheometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060707.7U CN203705302U (en) | 2014-02-10 | 2014-02-10 | Double-charging barrel capillary rheometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705302U true CN203705302U (en) | 2014-07-09 |
Family
ID=51055723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420060707.7U Expired - Fee Related CN203705302U (en) | 2014-02-10 | 2014-02-10 | Double-charging barrel capillary rheometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705302U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822851A (en) * | 2014-02-10 | 2014-05-28 | 李振中 | Double-charging barrel capillary pipe rheometer |
| CN104316437A (en) * | 2014-10-15 | 2015-01-28 | 华南理工大学 | Plunger type testing apparatus and test method for extrusion rheological property |
-
2014
- 2014-02-10 CN CN201420060707.7U patent/CN203705302U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822851A (en) * | 2014-02-10 | 2014-05-28 | 李振中 | Double-charging barrel capillary pipe rheometer |
| CN104316437A (en) * | 2014-10-15 | 2015-01-28 | 华南理工大学 | Plunger type testing apparatus and test method for extrusion rheological property |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20200210 |