CN203824961U - Ultrasonic online measuring device for melt flow orientation of polymers - Google Patents
Ultrasonic online measuring device for melt flow orientation of polymers Download PDFInfo
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- CN203824961U CN203824961U CN201420197592.6U CN201420197592U CN203824961U CN 203824961 U CN203824961 U CN 203824961U CN 201420197592 U CN201420197592 U CN 201420197592U CN 203824961 U CN203824961 U CN 203824961U
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- 229920000642 polymer Polymers 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000155 melt Substances 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 10
- 238000002604 ultrasonography Methods 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000011160 research Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 3
- 238000012512 characterization method Methods 0.000 abstract description 2
- 238000001746 injection moulding Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002197 infrared dichroism spectroscopy Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004736 wide-angle X-ray diffraction Methods 0.000 description 1
Abstract
The utility model discloses an ultrasonic online measuring device for the melt flow orientation of polymers. The device comprises a signal processing center and ultrasonic transducers, wherein the ultrasonic transducers are used for transmitting and receiving ultrasonic signals; the signal processing center is connected with the ultrasonic transducers; the number of the ultrasonic transducers is at least two, and the ultrasonic transducers are arranged on a melt flowing channel when a polymer material is formed. A measuring section of the device is arranged at the material outlet of an extruder or an injection molding machine, and by using the ultrasonic transducers arranged on the cross section of the melt flowing channel, the orientation of polymers flowing through the channel in real time is characterized through ultrasonic signals in different directions on the cross section. The device can realize the online measurement and characterization research of the melt flow orientation of polymers in the process of machining, and overcomes the defects that traditional orientation test samples are harsh in off-line sampling measurement and sample preparation requirements and high in test cost, and the like. The online real-time monitoring on the melt flow orientation of polymers is realized, and a more scientific basis is provided for the adjustment of process conditions in the process of product processing.
Description
Technical field
The utility model relates to the measurement mechanism in polymer material molding manufacture field, relates in particular to a kind of device of ultrasound wave on-line measurement polymer melt flow orientation.
Background technology
The degree of orientation is important parameter of macromolecular material, and its size has close relationship with the macro physical performance of macromolecular material.Except the Some features of polymkeric substance itself, in process, form as characteristics such as the orientation textures of phase morphology structure, aggregated structure, strand, these all can produce very great impact to the performance of goods.So, in improving macromolecular material performance study, detection to Polymer Materials ' Structure and sign become an important research direction in macromolecule research field, and the real-time detection of material in materials processing forming process have been caused especially to the attention of Chinese scholars.
The method of measuring at present polymer orientation degree mainly contains infrared dichroism method, By Birefringence Method, wide-angle x-ray diffraction and sonic method etc.Compared with other several methods, sonic method can be under the condition that realizes Non-Destructive Testing the degree of orientation of characterize polymers.Acoustic wave propagation velocity is more faster than the direction perpendicular to chain along molecular backbone direction, and in main chain direction, vibration realizes by chemical bond in interatomic transmission, and in the direction perpendicular to main chain, only has the intermolecular force much weak between atom.If the velocity of sound of polymkeric substance represents with CU, the velocity of sound in sample to be tested is C, as follows Calculating material degree of orientation F and average angle of orientation < θ >.
In prior art, ultrasound wave detects the method for the tubing degree of orientation online, same material is prepared the sample of multiple different orientation degree, by the velocity of sound of the above-mentioned multiple samples of ultrasonic investigation, recycling infrared dichroism method is carried out the Accurate Measurement of the degree of orientation to above-mentioned multiple samples; Then set up ultrasonic velocity and degree of orientation relation, obtain corresponding working curve; On pipe production line, the tubing of extruding in producing is carried out to continuous test and obtain acoustic velocity, recycle above-mentioned working curve real-time online and detect, determine the tubing degree of orientation.Although be convenient to realize robotization and the intellectuality of degree of orientation on-line monitoring, itself be to demarcate by off-line method, then set up working curve between ultrasonic velocity and the degree of orientation, cannot study for the dynamic orientation in melt flows process.
The method of measuring the macromolecular material degree of orientation in prior art, mostly is spot measurement, although or be that multiple spot is not the orientation information of research same position, these methods of essence can only obtain the one-dimension information on measurement point.
But, these methods all cannot detect melt in melt-flow the multidimensional orientation conditions information in passage.
Summary of the invention
The purpose of this utility model is to utilize the ultrasonic line Measurement Technique of multiple spot to study the melt flows orientation conditions in same cross section of fluid channel, to overcome, product off-line measurement in prior art, production efficiency are low, high in cost of production shortcoming, propose a kind of devices and methods therefor of ultrasound wave on-line measurement polymer melt flow orientation.
The utility model is achieved through the following technical solutions:
A device for ultrasound wave on-line measurement polymer melt flow orientation, described aligning device comprises signal processing enter, for launching and the ultrasonic transducer of received ultrasonic signal; Signal processing enter is connected with ultrasonic transducer;
Described ultrasonic transducer has two at least, and while being arranged on polymeric material moulding, melt-flow is on passage.
At least two ultrasonic transducers are fixedly mounted on perpendicular to melt-flow on the xsect of passage.
Described aligning device also includes at least two plane-reflectors, and this plane-reflector is arranged on melt-flow through the inwall of passage relative with ultrasonic transducer.
Described ultrasonic transducer has four at least, and wherein every two are arranged on melt-flow on the same straight line of passage, and one of every centering for launching ultrasonic signal, and another is for received ultrasonic signal.
Described melt-flow is round section through passage.
Described aligning device also comprises at least two melt force sensors, and this melt force sensor is arranged on respectively the runner upstream and downstream of melt-flow through passage, measurement xsect symmetry.
Described aligning device also comprises a melt temperature sensor, and this melt temperature sensor is arranged on melt-flow in the ultrasonic measurement xsect of passage.
The method of said apparatus on-line measurement polymer melt flow orientation, comprises the steps:
Send ultrasound wave launch time, frequency instruction by computing machine to ultrasonic pulse generation/receptacle, ultrasonic pulse generation/receptacle sends pulse signal to ultrasonic transducer on request, radiation, scattered signal that meanwhile pick-up transducers is accepted, the signal entering signal processing enter that this signal detects together with melt force sensor, melt temperature sensor, carry out A/D digital-to-analog conversion and Signal Pretreatment, the data of handling send back to computing machine and store and analyze.
The utility model, with respect to prior art, has following advantage and effect:
At present mostly adopt infrared spectrometer or X-ray diffractometer to carry out off-line measurement to macromolecular material to the measurement of the macromolecular material degree of orientation, not only the response time is long, also cannot realize material is carried out to on-line measurement and requirement of real-time control, and this devices and methods therefor, orientation conditions that can real-time online characterize polymers.
Adopt the ultrasonic transducer of different numbers to be arranged on perpendicular to obtaining multi-direction measurement data on the xsect of melt flow passage, characterize real-time streams and cross the orientation conditions of polymkeric substance of runner and composition thereof by different directions ultrasonic signal.
This device can be realized on-line measurement and the characterization research of polymkeric substance melt flows orientation in process, has overcome tradition directed test sample off-line sampling measurement, sample preparation requirement harshness, the high deficiency of testing expense.Realize the on-line real time monitoring of polymer melt flow orientation, for the adjustment of product processing process conditions provides the more foundation of science.
As can be seen here, this installs, and not only technological means is simple and easy to do, and has overcome that product off-line measurement in prior art, production efficiency are low, high in cost of production shortcoming.
Brief description of the drawings
Fig. 1 is the measuring section 13 of the device of the utility model ultrasound wave on-line measurement polymer melt flow orientation, cross-sectional structure schematic diagram.
Fig. 2 is the vertical section structure schematic diagram of Fig. 1.
Fig. 3 is 2 pairs of ultrasonic transducer structure schematic diagram.
Fig. 4 is 3 pairs of ultrasonic transducer structure schematic diagram.
Fig. 5 is 4 pairs of ultrasonic transducer structure schematic diagram.
Fig. 6 is the measuring section 13 of the device of the utility model ultrasound wave on-line measurement polymer melt flow orientation, is connected to the schematic diagram of extruding on injection-moulding device 14.
Fig. 7 is measuring system hardware block diagram.
Embodiment
Below in conjunction with specific embodiment, the utility model is more specifically described in detail.
Embodiment
As shown in Fig. 1 to 7.The utility model discloses the device of a kind of ultrasound wave on-line measurement polymer melt flow orientation, described aligning device comprises signal processing enter (seeing Fig. 7), for launching and the ultrasonic transducer 1 of received ultrasonic signal; Signal processing enter is connected with ultrasonic transducer 1; Described ultrasonic transducer 1 has two at least, and while being arranged on polymeric material moulding, melt-flow is on passage 2.
Described melt-flow is round section through passage 2 (being test section).Round section reduces the asymmetric anisotropy that causes that melt flow field is inhomogeneous and cause of runner.
At least two ultrasonic transducers 1 are fixedly mounted on perpendicular to melt-flow on the xsect of passage 2 (comprise be arranged on melt-flow on the same cross section of passage 2 or be vertically mounted on melt-flow on the multiple different xsect of passage 2).In the time that ultrasonic transducer 1 adopts two, in 90 ° on the xsect of passage 2 perpendicular to melt-flow.
Described aligning device also includes at least two plane-reflectors 3, and this plane-reflector 3 is arranged on melt-flow through the inwall of passage 2 relative with ultrasonic transducer 1.The quantity of plane-reflector 3 can be according to the quantity relative set of ultrasonic transducer 1, as three, four, five etc.
The object of mounting plane reflecting plate 3 is to avoid the Pipeline Curvature generation reflected signal deflection of melt-flow through passage 2.
In Fig. 3, ultrasonic transducer has 2 pairs.4 ultrasonic transducers 1 are being installed on the same xsect of passage 2 perpendicular to melt-flow, wherein every two are arranged on same straight line, one for launching ultrasonic signal, and another is for received ultrasonic signal, and between every adjacent two straight lines, angle is 90 °.
In Fig. 4, ultrasonic transducer 1 has 3 pairs.6 ultrasonic transducers 1 are being installed on the same xsect of passage 2 perpendicular to melt-flow, wherein every two pairs are arranged on same straight line, one for launching ultrasonic signal, and another is for received ultrasonic signal, and between every adjacent two straight lines, angle is 60 °.In Fig. 5, ultrasonic transducer 1 has 4 pairs, and wherein every two pairs are arranged on melt-flow on the same straight line of passage 2, and one of every centering for launching ultrasonic signal, and another is for received ultrasonic signal, and between every adjacent two straight lines, angle is 45 °.
Described aligning device also comprises at least two melt force sensors 5 (as Fig. 2), this melt force sensor 5 is arranged on respectively the runner upstream and downstream of melt-flow through passage 2, measurement xsect symmetry, for pressure drop, inside push away ultrasonic transducer and measure the melt pressure in xsect.
Described aligning device also comprises a melt temperature sensor 4, and this melt temperature sensor 4 is arranged on melt-flow in the ultrasonic measurement xsect of passage, for measuring the melt temperature of xsect.
Shown in Fig. 6.The measuring section 13 of this device is arranged on the material outlet place of extruder 14 (or injection machine), utilize ultrasonic transducer is installed on channel cross-section in melt-flow, characterize real-time streams and cross the orientation conditions of polymkeric substance of runner and composition thereof by different directions ultrasonic signal on xsect.
The method that adopts said apparatus on-line measurement polymer melt flow orientation, can realize as follows:
As shown in Figure 7.Sent the instructions such as ultrasound wave launch time, frequency to ultrasonic pulse generation/receptacle by computing machine, ultrasonic pulse generation/receptacle sends pulse signal to ultrasonic transducer on request, the signal such as radiation, scattering that meanwhile pick-up transducers is accepted, the signal entering signal processing enter that this signal detects together with melt force sensor 5, melt temperature sensor 4, carry out A/D digital-to-analog conversion and Signal Pretreatment, the data of handling send back to computing machine and store and analyze.
As mentioned above, just can realize preferably the utility model.
Embodiment of the present utility model is not restricted to the described embodiments; other are any does not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitute, combination, simplify; all should be equivalent substitute mode, within being included in protection domain of the present utility model.
Claims (5)
1. a device for ultrasound wave on-line measurement polymer melt flow orientation, is characterized in that:
Described aligning device comprises that signal processing enter is for launching and the ultrasonic transducer of received ultrasonic signal; Signal processing enter is connected with ultrasonic transducer;
Described ultrasonic transducer has two at least, and while being arranged on polymeric material moulding, melt-flow is on passage.
2. the device of ultrasound wave on-line measurement polymer melt flow orientation according to claim 1, is characterized in that: described measurement aligning device comprises that at least two ultrasonic transducers are fixedly mounted on perpendicular to melt-flow on the xsect of passage.
3. the device of ultrasound wave on-line measurement polymer melt flow orientation according to claim 2, it is characterized in that: described aligning device also includes at least two plane-reflectors, this plane-reflector is arranged on melt-flow through the inwall of passage relative with ultrasonic transducer.
4. the device of ultrasound wave on-line measurement polymer melt flow orientation according to claim 1, it is characterized in that: described ultrasonic transducer has four, wherein every two are arranged on melt-flow on the same straight line of passage, one of every centering for launching ultrasonic signal, and another is for received ultrasonic signal.
5. according to the device of the ultrasound wave on-line measurement polymer melt flow orientation described in any one in claim 1 to 4, it is characterized in that: described aligning device also comprises at least two melt force sensors, this melt force sensor is arranged on respectively the runner upstream and downstream of melt-flow through passage, measurement xsect symmetry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197592.6U CN203824961U (en) | 2014-04-22 | 2014-04-22 | Ultrasonic online measuring device for melt flow orientation of polymers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197592.6U CN203824961U (en) | 2014-04-22 | 2014-04-22 | Ultrasonic online measuring device for melt flow orientation of polymers |
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| Publication Number | Publication Date |
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| CN203824961U true CN203824961U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420197592.6U Expired - Lifetime CN203824961U (en) | 2014-04-22 | 2014-04-22 | Ultrasonic online measuring device for melt flow orientation of polymers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954685A (en) * | 2014-04-22 | 2014-07-30 | 华南理工大学 | Device and method for ultrasonically measuring flow orientation of polymer melt on line |
| CN106596331A (en) * | 2017-01-20 | 2017-04-26 | 华南理工大学 | Device and method for on-line measurement of polymer melt density |
| CN113763674A (en) * | 2021-08-23 | 2021-12-07 | 北京奥蓝仕技术有限公司 | Remote absolute stress real-time monitoring and early warning system and method |
-
2014
- 2014-04-22 CN CN201420197592.6U patent/CN203824961U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954685A (en) * | 2014-04-22 | 2014-07-30 | 华南理工大学 | Device and method for ultrasonically measuring flow orientation of polymer melt on line |
| CN103954685B (en) * | 2014-04-22 | 2017-02-15 | 华南理工大学 | Device and method for ultrasonically measuring flow orientation of polymer melt on line |
| CN106596331A (en) * | 2017-01-20 | 2017-04-26 | 华南理工大学 | Device and method for on-line measurement of polymer melt density |
| CN106596331B (en) * | 2017-01-20 | 2023-04-21 | 华南理工大学 | Device and method for online measurement of polymer melt density |
| CN113763674A (en) * | 2021-08-23 | 2021-12-07 | 北京奥蓝仕技术有限公司 | Remote absolute stress real-time monitoring and early warning system and method |
| CN113763674B (en) * | 2021-08-23 | 2023-11-07 | 北京奥蓝仕技术有限公司 | Remote absolute stress real-time monitoring and early warning system and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |