CN204172300U - The device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring - Google Patents
The device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring Download PDFInfo
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- CN204172300U CN204172300U CN201420609921.3U CN201420609921U CN204172300U CN 204172300 U CN204172300 U CN 204172300U CN 201420609921 U CN201420609921 U CN 201420609921U CN 204172300 U CN204172300 U CN 204172300U
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- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000011161 development Methods 0.000 title claims abstract description 29
- 238000000520 microinjection Methods 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 238000000465 moulding Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 abstract description 26
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000001746 injection moulding Methods 0.000 abstract description 4
- 239000000289 melt material Substances 0.000 abstract description 4
- 239000007924 injection Substances 0.000 description 24
- 238000002347 injection Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 14
- 239000000155 melt Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000012899 standard injection Substances 0.000 description 6
- 239000012809 cooling fluid Substances 0.000 description 4
- 230000000875 corresponding effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000877 morphologic effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002079 cooperative effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses the device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring, regulate and control module, observation module and control module by melt and form; Described melt regulation and control module comprises cavity plate, sliding ring, guide pillar, transparent die cavity cover plate, gripper shoe, bearing, motor and power transmission shaft; Described cavity plate comprises taper sprue, semicircle fluid channel, air discharge duct, steam vent, annular seal groove, circular cavity, water back and cooling pipe.The utility model possesses following advantage: (1) has broken away from the restriction requirement to being observed the melt material transparency; (2) monitoring result accurately can reflect the real-time Form Development of composite in injection moulding production process under high temperature fused state; (3) the polymer micro-nano manufacturing technology fields such as micro-injection moulding are applicable to.
Description
Technical field
The utility model relates to a kind of regulation device of polymer micro-nano manufacture process, is specifically related to the on-Line Monitor Device of composite Form Development in a kind of micro-injection moulding.
Background technology
Under the MEMS developed rapidly (MEMS) drives, as an important technology of the emerging development of field of micro-Na manufacture, micro-effect be injection-moulded in polymer micro-nano manufacture becomes and becomes more and more important.The many advantages such as low by means of cost, productivity ratio is high and stock utilization is high, micro-injection molding technology has been used to the micro polymer nano parts manufacturing numerous kinds in recent years.The development of miniaturization of products trend, not only proposes more strict requirement to the dimensional accuracy of micro-injection-molded item, and it is also proposed higher requirement to its property indices.In this context, how carrying out furtheing investigate from the angle of Material cladding under minute yardstick is a new problem being worth discussion.Pass through Material cladding, the correlation experience of accumulation in nano composite material development can be used for reference, realize multiple material to make up for each other's deficiencies and learn from each other in performance, produce cooperative effect, make the generation of composite micro-goods excellent and regulatable combination property, to meet the great demand of domestic and international market to the micro-injection-molded item of high-performance.
According to goods " form determines performance, and performance determines purposes " this principle, studying polymer composites Form Development rule in micro-injection moulding is gear to actual circumstances and problem in the urgent need to address in this field current.Due to the complexity of polymer melt behavior in flow process and the diversity of influence factor, the external morphology of current Study Polymer Melts composite mainly takes offline inspection mode, namely forming process terminates to carry out cutting sampling, surface treatment to goods afterwards, relends instrument/means such as helping electronic scanner microscope, transmission electron microscope and light microscope and carries out observation and characterize.If testing result can not meet the material shape requirement of expection, need adjusting process parameter to carry out repeating experiment/production, and then carry out sampling and form test sign, so repeatedly till meeting the demands.Obviously, above-mentioned off-line checking method length consuming time and process is loaded down with trivial details; In addition, inevitably can destroy original form of composite inner before detecting to the sampling of goods and subsequent physical/chemical treating process, thus cause metrical error.
In view of the deficiency of above-mentioned offline inspection mode, if Real-Time Monitoring can be carried out to polymer composites external morphology evolution process in micro injection molding process, thus the injection molding process of micro-goods is optimized, just can significantly reduce detection time and improve accuracy of detection.Patent (application publication number: CN103085249A; Patent name: a kind of visual polymer melt Injection filling running system) disclose a kind of simulating polymer melt Injection filling flowing real-time monitoring system, the major function of system described in this patent is identical with the visualization system generally used at present, namely for observing macroscopical flow regime of polymer melt.And from polymer composites Form Development (motion state as micro-nano granules) angle monitoring minute yardstick, there is following open defect in this patent: (1) this system is analogue experiment installation, utilize the polymeric material in flow regime under normal temperature, its experimental result is difficult to accurately to reflect that the true form of polymer composites in injection moulding production process under high temperature fused state develops; (2) involved by this patent is conventional shot size scope, cannot be applicable to micro-injection moulding occasion that size is small; (3) be the most keyly, this system adopts transparent polymer fluid, and utilize penetration light path, therefore high-speed camera obtain about the resultant effect that the shape information of filler particles is along runner entire depth direction in image, thus clearly cannot observe the form of designated depth position polymer composites in runner.In sum, for realizing the on-line monitoring of polymer composites Form Development in micro-injection moulding process, still there is the solution of many problems demand in this field at present.
Summary of the invention
The purpose of this utility model is to provide the device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring, with the demand of the micro injection molding technology of satisfied fast development to promptly and accurately process detection means.To achieve these goals, the utility model takes following technical solution:
The device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring that the utility model provides, comprise melt regulation and control module, described melt regulation and control module comprises cavity plate, sliding ring, guide pillar, transparent die cavity cover plate, gripper shoe, bearing, motor and power transmission shaft; Described transparent die cavity cover plate is fixedly installed on the power transmission shaft that connects with associated electric motor; Described power transmission shaft is axially fixed in gripper shoe by bearing; " closing " and " unlatching " two kinds of relative position relations can be formed by the axially-movable of guide pillar between described cavity plate and transparent die cavity cover plate; Under described motor and power transmission shaft drive, transparent die cavity cover plate can rotate around its axis; Described melt regulation and control module can be assemblied in standard injection mold frame, is convenient to realize injection mo(u)lding on-line operation.
Described cavity plate is provided with a taper sprue, and described taper sprue large end place is provided with a semicircle fluid channel be communicated with it, and described semicircle fluid channel end is circumferentially provided with an air discharge duct be communicated with it; The end of described air discharge duct is provided with a steam vent be communicated with it, and described steam vent and taper sprue are positioned at diametrically same; A concentric annular seal groove is respectively provided with inside and outside described semicircle fluid channel; When described cavity plate and transparent die cavity cover plate " close ", the sealing of semicircle fluid channel can be realized by the sliding ring in annular seal groove; Described cavity plate central authorities are provided with a circular cavity, and are provided with a water back run through in semicircle fluid channel side; Described water back both sides are respectively provided with a cooling pipe parallel with it.
The radius of described semicircle fluid channel is r, and the width of square-section is W, the degree of depth is H, and relative dimensions span is preferably: 50mm≤r≤200mm; 200 μm≤H≤1000 μm; 10≤W/H≤20.
In the micro-injection moulding of described a kind of on-line monitoring, the device of composite Form Development also comprises observation module, and described observation module comprises annular light source, plane mirror, microscope and high-speed camera; Described annular light source and plane mirror are installed in gripper shoe plane relative with transparent die cavity cover plate in melt regulation and control module, described plane mirror is right against the semicircle fluid channel in cavity plate, described microscope and high-speed camera be positioned over successively melt regulation and control module outside, and described plane mirror, microscope and high-speed camera be centrally located on same level line; Described observation module adopts reflection type optical path, compared to penetration light path, has broken away from the restriction requirement to being observed the melt material transparency.
In the micro-injection moulding of described a kind of on-line monitoring, the device of composite Form Development also comprises control module, and described control module comprises industrial computer and specical software system; The control circuit of described industrial computer and injection machine, melt regulates and controls module and high-speed camera all adopts private cable to be connected.
In the micro-injection moulding of a kind of on-line monitoring described in the utility model, the operation principle of the device of composite Form Development is as follows: by described melt regulation and control module assembly in standard injection mold frame, and standard injection mold frame is arranged on injection machine forms micro injection molding system, utilize the heating rod be installed in described water back that cavity plate is heated to predetermined temperature; Before monitoring, the polymer composites be made up of one or more thermoplastic polymers and one or more micro-nano fillers is put into injection machine melt, after described cavity plate and transparent die cavity cover plate " close ", melt is injected semicircle fluid channel from described taper sprue, in described taper sprue and semicircle fluid channel, original air flows through air discharge duct successively and steam vent is discharged under melt promotes, described control module is according to melt pressure value before and after the injection of gathered injection machine simultaneously, calculates the melt pressure obtaining unit length of flow and falls; After injection machine stops injection, cavity plate is cooled to room temperature by logical cooling fluid in described cooling pipe, takes out afterwards the cold burden in semicircle fluid channel until described cavity plate and transparent die cavity cover plate " unlatching "; Then described cavity plate is again heated to predetermined temperature, after described cavity plate and transparent die cavity cover plate " close ", again melt is injected described semicircle fluid channel, described control module sends instruction to motor simultaneously, makes it rotate with the flow direction of preset rotation speed according to melt in described semicircle fluid channel; Subsequently, the light transmission sent by described annular light source transparent die cavity cover plate illuminates the melt flowed in semicircle fluid channel, described high-speed camera catches from plane mirror reflection and the melt flows image amplified by microscope, monitors the form of described semicircle fluid channel interpolymer composite thus; After injection machine stops injection, in described cooling pipe, cavity plate is cooled to room temperature by logical cooling fluid, after described cavity plate and transparent die cavity cover plate " unlatching ", takes out the cold burden in semicircle fluid channel; Finally, the polymer composites morphological image information that described control module analysis is gathered by high-speed camera, and repeat said process after adjusting motor speed, carry out on-line monitoring next time.
The utility model applies Moving Boundary condition to melt, and namely under the rotation of described transparent die cavity cover plate, one of them wall of semicircle fluid channel does the motion identical with melt flows direction.Therefore, only need regulate and control the rotating speed of described transparent die cavity cover plate, just can obtain the different motion speed of fluid channel wall and the different in flow rate/shear rate of melt, and then can by the Form Development of the fluid channel deep inside polymer composites observing module monitors corresponding with different melt flow velocity/shear rate.
The utility model has essence novelty, main characteristics is: mobility structure achieving fluid channel wall, speed and the shear rate of polymer composites melt just can be changed by the translational speed of regulation and control fluid channel wall, and then can by the Form Development process of any deep inside polymer composites of observation module online monitoring fluid channel.
The utility model also tool has the following advantages: 1, observe module adopt reflection type optical path, broken away from the restriction requirement to being observed the melt material transparency, therefore the scope of application is wider; 2, adopt injection mo(u)lding full-scale condition, monitoring result accurately can reflect the real-time Form Development of composite in injection moulding production process under high temperature fused state; 3, described device relates to micro-dimension scope, is applicable to the polymer micro-nano manufacturing technology fields such as micro-injection moulding.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is melt regulation and control module " unlatching " state diagrams.
Fig. 3 is that melt regulation and control module " closes " state diagram.
Fig. 4 is the A-A sectional view in Fig. 3.
Fig. 5 is the B-B sectional view in Fig. 4.
Fig. 6 is the partial enlarged view in I region in Fig. 5.
In figure: 1, injection machine; 2, melt regulation and control module; 3, microscope; 4, high-speed camera; 5, control module; 21, cavity plate; 22, sliding ring; 23, guide pillar; 24, transparent die cavity cover plate; 25, plane mirror; 26, gripper shoe; 27, bearing; 28, motor; 29, power transmission shaft; 210, annular light source; 2101, taper sprue; 2102, cooling pipe; 2103, semicircle fluid channel; 2104, water back; 2105, air discharge duct; 2106, steam vent; 2107, annular seal groove; 2108, circular cavity.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail, but the claimed scope of the utility model is not limited to the scope of embodiment statement.
With reference to Fig. 1 ~ Fig. 6, the device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring that the utility model provides, comprise melt regulation and control module 2, described melt regulation and control module 2 comprises cavity plate 21, sliding ring 22, guide pillar 23, transparent die cavity cover plate 24, gripper shoe 26, bearing 27, motor 28 and power transmission shaft 29; Described transparent die cavity cover plate 24 is fixedly installed in motor 28 on joining power transmission shaft 29; Described power transmission shaft 29 is axially fixed in gripper shoe 26 by bearing 27; " closing " and " unlatching " two kinds of relative position relations can be formed by the axially-movable of guide pillar 23 between described cavity plate 21 and transparent die cavity cover plate 24; Under described motor 28 and power transmission shaft 29 drive, transparent die cavity cover plate 24 can rotate around its axis; Described melt regulation and control module 2 can be assemblied in standard injection mold frame, is convenient to realize injection mo(u)lding on-line operation.
Described cavity plate 21 is provided with a taper sprue 2101, and described taper sprue large end place is provided with a semicircle fluid channel 2103 be communicated with it, and described semicircle fluid channel 2103 end is circumferentially provided with an air discharge duct be communicated with it 2105; The end of described air discharge duct 2105 is provided with a steam vent be communicated with it 2106, and described steam vent 2106 is positioned at diametrically same with taper sprue 2101; A concentric annular seal groove 2107 is respectively provided with inside and outside described semicircle fluid channel 2103; When described cavity plate 21 is with transparent die cavity cover plate 24 " closing ", the sealing of semicircle fluid channel 2103 can be realized by the sliding ring 22 in annular seal groove 2107; Described cavity plate 21 central authorities are provided with a circular cavity 2108, and are provided with a water back run through 2104 in semicircle fluid channel 2103 side; Described water back 2014 both sides are respectively provided with a cooling pipe 2102 parallel with it.
The radius of described semicircle fluid channel 2103 is r, and the width of square-section is W, the degree of depth is H, and relative dimensions span is preferably: 50mm≤r≤200mm; 200 μm≤H≤1000 μm; 10≤W/H≤20.
In the micro-injection moulding of described a kind of on-line monitoring, the device of composite Form Development also comprises observation module, and described observation module comprises annular light source 210, plane mirror 25, microscope 3 and high-speed camera 4; Described annular light source 210 and plane mirror 25 are installed in gripper shoe 26 plane relative with transparent die cavity cover plate 24 in melt regulation and control module 2, described plane mirror 25 is right against the semicircle fluid channel 2103 in cavity plate 21, described microscope 3 and high-speed camera 4 be positioned over successively melt regulation and control module 2 outside, and described plane mirror 25, microscope 3 and high-speed camera 4 be centrally located on same level line; Described observation module adopts reflection type optical path, compared to penetration light path, has broken away from the restriction requirement to being observed the melt material transparency.
In the micro-injection moulding of described a kind of on-line monitoring, the device of composite Form Development also comprises control module 5, and described control module 5 comprises industrial computer and specical software system; The control circuit of described industrial computer and injection machine, melt regulates and controls module 2 and high-speed camera 4 all adopts private cable to be connected.
In the utility model, described melt regulation and control module 2 is assemblied in standard injection mold frame, and standard injection mold frame is arranged on injection machine forms micro injection molding system, utilize the heating rod be installed in described water back 2104 that cavity plate 21 is heated to predetermined temperature, before monitoring, the polymer composites be made up of one or more thermoplastic polymers and one or more micro-nano fillers is put into injection machine melt, after described cavity plate 21 with transparent die cavity cover plate 24 " closing ", melt is injected semicircle fluid channel 2103 from described taper sprue 2101, in described taper sprue 2101 and semicircle fluid channel 2103, original air flows through air discharge duct 2105 successively and steam vent 2106 is discharged under melt promotes, described control module 5 is according to melt pressure value before and after the injection of gathered injection machine simultaneously, calculate the melt pressure obtaining unit length of flow to fall, after injection machine stops injection, in described cooling pipe 2102, cavity plate 21 is cooled to room temperature by logical cooling fluid, takes out afterwards the cold burden in semicircle fluid channel 2103 until described cavity plate 21 and transparent die cavity cover plate 24 " unlatching ", then described cavity plate 21 to predetermined temperature is again heated, after described cavity plate 21 with transparent die cavity cover plate 24 " closing ", again melt is injected described semicircle fluid channel 2103, described control module 5 sends instruction to motor 28 simultaneously, makes it rotate with the flow direction of preset rotation speed according to melt in described semicircle fluid channel 2103, subsequently, the light transmission transparent die cavity cover plate 24 sent by described annular light source 210 illuminates the melt flowed in semicircle fluid channel 2103, described high-speed camera 4 catches and reflects and the melt flows image amplified by microscope 3 from plane mirror 25, monitors the form of described semicircle fluid channel 2103 interpolymer composite thus, after injection machine stops injection, in described cooling pipe 2102, cavity plate 21 is cooled to room temperature by logical cooling fluid, after described cavity plate 21 with transparent die cavity cover plate 24 " unlatching ", takes out the cold burden in semicircle fluid channel 2103, finally, described control module 5 analyzes the polymer composites morphological image information gathered by high-speed camera 4, and repeats said process after adjusting motor 28 rotating speed, carries out on-line monitoring next time.
As everyone knows, the shear rate suffered by melt is the principal element affecting polymer composites Form Development.Be different from traditional fixed boundary condition, the utility model applies Moving Boundary condition to melt, and namely under the rotation of described transparent die cavity cover plate 24, one of them wall of semicircle fluid channel 2103 does the motion identical with melt flows direction.Therefore, only need regulate and control the rotating speed of described transparent die cavity cover plate 24, just can obtain the different motion speed of fluid channel wall and the different in flow rate/shear rate of melt, and then can by the Form Development of the fluid channel deep inside polymer composites observing module monitors corresponding with different melt flow velocity/shear rate.
The above embodiment is most preferred embodiment of the present utility model, but and is not used to limit the utility model.Do not deviating from the utility model principle situation, those of ordinary skill in the art can make various corresponding change and distortion according to the utility model, but these change accordingly and distortion all should belong within the right belonging to the utility model.
Claims (4)
1. the device of composite Form Development in the micro-injection moulding of on-line monitoring, it is characterized in that: comprise melt regulation and control module, described melt regulation and control module comprises cavity plate, sliding ring, guide pillar, transparent die cavity cover plate, gripper shoe, bearing, motor and power transmission shaft; Described transparent die cavity cover plate is fixedly installed on the power transmission shaft that connects with associated electric motor; Described power transmission shaft is axially fixed in gripper shoe by bearing; " closing " and " unlatching " two kinds of relative position relations can be formed by the axially-movable of guide pillar between described cavity plate and transparent die cavity cover plate; Under described motor and power transmission shaft drive, transparent die cavity cover plate can rotate around its axis.
2. the device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring according to claim 1, it is characterized in that: described cavity plate is provided with a taper sprue, described taper sprue large end place is provided with a semicircle fluid channel be communicated with it, and described semicircle fluid channel end is circumferentially provided with an air discharge duct be communicated with it; The end of described air discharge duct is provided with a steam vent be communicated with it, and described steam vent and taper sprue are positioned at diametrically same; A concentric annular seal groove is respectively provided with inside and outside described semicircle fluid channel; When described cavity plate and transparent die cavity cover plate " close ", the sealing of semicircle fluid channel can be realized by the sliding ring in annular seal groove; Described cavity plate central authorities are provided with a circular cavity, and are provided with a water back run through in semicircle fluid channel side; Described water back both sides are respectively provided with a cooling pipe parallel with it.
3. the device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring according to claim 2, it is characterized in that: the radius of described semicircle fluid channel is r, the width of square-section is W, the degree of depth is H, and relative dimensions span is preferably: 50mm≤r≤200mm; 200 μm≤H≤1000 μm; 10≤W/H≤20.
4. the device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring according to claim 1, characterized by further comprising observation module, described observation module comprises annular light source, plane mirror, microscope and high-speed camera; Described annular light source and plane mirror are installed in gripper shoe plane relative with transparent die cavity cover plate in melt regulation and control module, described plane mirror is right against the semicircle fluid channel in cavity plate, described microscope and high-speed camera are positioned over outside melt regulation and control module successively, and being centrally located on same level line of described plane mirror, microscope and high-speed camera.
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| CN201420609921.3U CN204172300U (en) | 2014-10-11 | 2014-10-11 | The device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring |
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| CN201420609921.3U CN204172300U (en) | 2014-10-11 | 2014-10-11 | The device of composite Form Development in the micro-injection moulding of a kind of on-line monitoring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104309085A (en) * | 2014-10-11 | 2015-01-28 | 浙江师范大学 | Device and method for monitoring morphological evolution of composite material in injection molding on line |
| CN110746830A (en) * | 2019-10-31 | 2020-02-04 | 佛山市涂亿装饰材料科技有限公司 | Light-reflecting powder coating for traffic signs and preparation method thereof |
| CN113715284A (en) * | 2021-08-31 | 2021-11-30 | 中南大学 | Online polymer viscosity detection system and method for micro-scale rectangular slit |
| CN114393788A (en) * | 2022-01-19 | 2022-04-26 | 西南科技大学 | Convection mixing action mode filling balance regulation and control device |
-
2014
- 2014-10-11 CN CN201420609921.3U patent/CN204172300U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104309085A (en) * | 2014-10-11 | 2015-01-28 | 浙江师范大学 | Device and method for monitoring morphological evolution of composite material in injection molding on line |
| CN110746830A (en) * | 2019-10-31 | 2020-02-04 | 佛山市涂亿装饰材料科技有限公司 | Light-reflecting powder coating for traffic signs and preparation method thereof |
| CN113715284A (en) * | 2021-08-31 | 2021-11-30 | 中南大学 | Online polymer viscosity detection system and method for micro-scale rectangular slit |
| CN114393788A (en) * | 2022-01-19 | 2022-04-26 | 西南科技大学 | Convection mixing action mode filling balance regulation and control device |
| CN114393788B (en) * | 2022-01-19 | 2023-12-01 | 西南科技大学 | Filling balance regulating and controlling device for convection mixing action mode |
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Granted publication date: 20150225 Termination date: 20161011 |