CN102601976A - On-line measurement method for plastic product thickness on extruding machine - Google Patents
On-line measurement method for plastic product thickness on extruding machine Download PDFInfo
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- CN102601976A CN102601976A CN2012100900561A CN201210090056A CN102601976A CN 102601976 A CN102601976 A CN 102601976A CN 2012100900561 A CN2012100900561 A CN 2012100900561A CN 201210090056 A CN201210090056 A CN 201210090056A CN 102601976 A CN102601976 A CN 102601976A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 37
- 239000004033 plastic Substances 0.000 title claims abstract description 37
- 238000000691 measurement method Methods 0.000 title abstract 5
- 239000000463 material Substances 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims description 37
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 20
- 239000003990 capacitor Substances 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 235000012438 extruded product Nutrition 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- B29C48/92—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
- B29C2948/92009—Measured parameter
- B29C2948/92114—Dimensions
- B29C2948/92152—Thickness
-
- 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
- B29C2948/92009—Measured parameter
- B29C2948/9219—Density, e.g. per unit length or area
-
- 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
- B29C2948/92009—Measured parameter
- B29C2948/92295—Errors or malfunctioning, e.g. for quality control
-
- 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
- B29C2948/92323—Location or phase of measurement
- B29C2948/92438—Conveying, transporting or storage of articles
-
- 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
- B29C2948/92609—Dimensions
- B29C2948/92647—Thickness
-
- 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
- B29C2948/92685—Density, e.g. per unit length or area
-
- 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
- B29C2948/9279—Errors or malfunctioning, e.g. for quality control
-
- 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
- B29C2948/92933—Conveying, transporting or storage of articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses an on-line measurement method for plastic product thickness on an extruding machine. An extruded material outlet on the extruding machine is provided with at least one plate condenser; two electrodes of the plate condenser are respectively positioned on two sides of the extruded material; when the plastic material is extruded, the capacitance value of the plate condenser is measured; and the corresponding thickness of the extruded material is determined according to the function relationship of the capacitance value and the thickness of the extruded material. The on-line measurement method utilizes the principle that the thickness variation of the extruded material between the two electrodes of the capacitor is reflected by the capacitance value variation, and the product thickness of the plastic product is evaluated by the capacitance value variation of the plate condenser on two sides of the extruded material of the extruding machine. With the measurement method, on-line measurement can be realized, a user does not need to directly contact with the plastic product, and therefore the on-line measurement method is very suitable for measuring the thickness of the film product with high requirement on the surface quality.
Description
Technical field
The present invention relates to be used for the extruder device of plastic products, plastic product on-line thickness measuring method on especially a kind of extruder.
Background technology
Extruder is the device that is used to process the high molecule plastic product; Extrusion is meant that macromolecule (plastics) particle plastifies into uniform melt through extrusion system in barrel, and under the pressure of being set up in this course, by the process of screw rod continuous extruder head; Step such as that extrusion comprises is reinforced, fusion plastification, screw rod are extruded; Though it is shorter that this process is lasted, great changes will take place for the state of melt in extruder, and these quality that change final products have decisive influence.
In recent years, to the raising day by day of plastic product quality requirement, need be in process by on-line measurement control method sooner and more reliably.In process of production; These control methods need record the variation of various mass parameters as early as possible; In extruding production process, the technology of existing measurement extruded product quality mainly is the off-line point measurement, for example the macromolecule product of producing is taken out and carries out component analysis; The mechanical mechanics property experiment, thickness, density measure experiment etc.Yet; Though these metering systems can obtain the quality results of product; But if detect problematic product, the information that the needs that feedback according to these problems are regulated manufacturing parameter but has been after the several hrs, lags behind the control of real-time production far away; Cause the waste of last ton product this moment already, caused no small economic loss.
Present extruding production line On-line Measuring Method mainly comprise these two kinds of interior temperature of barrel and the on-line measurements of barrel internal pressure, yet these all can not directly reflect the final mass of product, and the information content that provides is extremely limited.For example application number is that 200910206586.6 Chinese patent " being used for measuring the method for temperature and the device of plastics of plastification in the exit of extruder " discloses a kind of utilization and treats that the spread speed of the sound wave of extruded material measures plastics method of temperature and device; But only be confined to online temperature or pressure test; The mass parameters such as thickness evenness, consistent in density property, mixing uniformity or the crystallisation by cooling uniformity of reflection plastic product quality can't be measured, thereby the final mass of plastic product can not be directly reflected.
Summary of the invention
The technical problem that the present invention will solve is: the thickness On-line Measuring Method that provides a kind of thickness to plastic product that is used on the extruder to carry out on-line measurement.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopted is:
Plastic product on-line thickness measuring method on a kind of extruder; The extruded material exit is provided with at least one plate condenser on the said extruder; Two electrodes of said plate condenser lay respectively at the both sides of extruded material; During the extruding of plastic material, measure the capacitance of plate condenser and confirm the respective thickness of extruded material by the functional relation of capacitance and extruded material thickness.
Further as preferred embodiment, the capacitance of measuring said plate condenser may further comprise the steps:
Convert the capacitance that plate condenser detects into analog voltage through a capacitance voltage modular converter;
Through an analog-to-digital conversion module said analog voltage is converted into digital quantity through analog-to-digital conversion;
Gather the digital quantity of said analog-to-digital conversion module output in real time through an acquisition module;
Obtain the capacitance of plate condenser according to the linear relationship of the magnitude of voltage digital quantity that collects and magnitude of voltage and capacitance.
Further as preferred embodiment, the functional relation of the capacitance of said plate condenser and extruded material thickness is:
In the following formula, δ is an extruded material thickness, ε
0Be the dielectric constant of air, ε
rBe the dielectric constant of extruded material, S is the relative area of capacity plate antenna two electrodes, and D is the relative distance of plate condenser two electrodes, C
xCapacitance for plate condenser.
Further as preferred embodiment, this measuring method may further comprise the steps:
Convert the capacitance that plate condenser detects into analog voltage through a capacitance voltage modular converter;
Through an analog-to-digital conversion module said analog voltage is converted into digital quantity through analog-to-digital conversion;
Gather the digital quantity of said analog-to-digital conversion module output in real time through an acquisition module;
Gather the digital quantity of said analog-to-digital conversion module output in real time through an acquisition module;
The respective thickness that magnitude of voltage that obtains according to the magnitude of voltage digital quantity that collects and capacitance voltage modular converter and the functional relation between the extruded material thickness are confirmed extruded material.
Further as improving, this measuring method also comprises the step that the digital quantity of said acquisition module collection is fed back to extruder control system.
Further as preferred embodiment, said plate condenser is positioned at extruder head exit on the extruder, and two electrodes of said plate condenser radially are fixed on the symmetrical both sides in said extruder head exit through insulating materials.
Further as preferred embodiment, said plate condenser is positioned at extruder head exit on the extruder, and two electrodes of said plate condenser pass through the support fixed placement in symmetrical both sides radially, said extruder head exit.
Further as preferred embodiment, two electrodes of said plate condenser can movable adjusting position through support.
The invention has the beneficial effects as follows: plastic product on-line thickness measuring method on the extruder of the present invention; Utilize the principle of extruded material varied in thickness between two electrodes of plate condenser capacitance variation reflection plate condenser; The product thickness of plastic product is assessed in the variation of capacitance that is positioned at the plate condenser of extruder extruded material both sides through measurement; This measuring method can realize on-line measurement; And need directly not contact, be fit to very much thickness measure the very high film series products of surperficial quality requirement with plastic product.
Description of drawings
Be described further below in conjunction with the accompanying drawing specific embodiments of the invention:
Fig. 1 is the structure principle chart of plastic product quality on-line measurement device on the extruder of the present invention;
Fig. 2 is the structural representation of measurement mechanism middle plateform capacitor of the present invention;
Fig. 3 is the position view of the measuring method embodiment middle plateform capacitor of plastic product thickness on the extruder of the present invention;
Fig. 4 is the principle schematic that method for measuring thickness middle plateform condenser capacitance value of the present invention is measured.
The specific embodiment
Plastic product on-line thickness measuring method on the extruder of the present invention; Utilize the principle of extruded material varied in thickness between two electrodes of plate condenser capacitance variation reflection plate condenser; Before measuring method of the present invention is described, specifically introduce plastic product quality on-line measurement device on the extruder that is used for the embodiment of the present invention measuring method earlier.
With reference to Fig. 1; Plastic product quality on-line measurement device on a kind of extruder; Comprise the plate condenser 10 that is used to measure extruded material mass parameter on the extruder; Two electrodes of said plate condenser are positioned at the both sides of extruded material, and two electrodes of said plate condenser 10 are drawn a lead 30 respectively and are connected to a capacitance measurement unit 20, and capacitance measurement unit 20 is used for monitoring in real time the variation tendency of 10 liang of interelectrode capacitance values of plate condenser; The user can draw out the capacitance variations curve of extruded material according to the capacitance that capacitance measurement unit 20 collects, for closed-loop control system provides the control supplemental characteristic.
Preferably; With reference to Fig. 1; Said capacitance measurement unit 20 comprises the capacitance voltage modular converter 21 that is used for the capacitance that said plate condenser 10 is measured is converted into analog voltage; Said capacitance voltage module 21 is connected with one and converts analog voltage the analog-to-digital conversion module 22 of digital quantity into, and said analog-to-digital conversion module 22 is connected with the acquisition module 23 of a continuous acquisition analog-to-digital conversion module 22 output digital quantities.
With reference to Fig. 2, plate condenser 10 is based on capacitance principle design, comprises two electrodes of being processed by metallic plate 11 of symmetry, and when extrusion did not take place, the dielectric layer between two electrodes 11 was an air 12; When extrusion takes place, comprise the dielectric layer that extruded material 13 such as macromolecule melt constitutes between two electrodes 11.
When extrusion took place, with reference to Fig. 4, setting δ was extruded material thickness, and d is the top electrode of plate condenser and the distance between the extruded material, and S is the relative area of plate condenser two electrodes, and D is the relative distance of plate condenser two electrodes, C
1Be the capacitance of extruded material upper space, C
2Be the capacitance of extruded material, C
3Capacitance for the extruded material lower space; The capacitance of plate condenser is C
xWhen extrusion takes place, capacitance C
xComputing formula be:
In above-mentioned formula 1,
Be the capacitance of extruded material upper space, wherein ε
0Dielectric constant for extruded material;
Being the capacitance of extruded material, wherein is the dielectric constant of extruded material, and δ is the thickness of extruded material;
Capacitance for the extruded material lower space.The thickness δ that can draw extruded material like this is:
Above-mentioned formula 2 has promptly provided the capacitance C of plate condenser
xAnd the functional relation between the thickness δ of extruded material.
With reference to Fig. 3, in the preferred embodiment of the present invention, be provided with a plate condenser in the extruder head exit 41 of extruder.Extruded material causes capacitance C during through plate condenser through extruder head 43
xVariation.It will be appreciated by those skilled in the art that; The mutual electrical isolation of metallic plate of two electrodes 11 of plate condenser 10; Promptly form capacitor; So two electrodes 11 are fixed to the radially both sides in extruder head exit 41 through insulating materials, just can measure the variation that extruded material passes the capacitance of the plate condenser 10 that two electrodes 11 cause.Except being fixed on two electrodes 11 of plate condenser 10 on the extruder through insulating materials; Can also two electrodes 11 of plate condenser 10 be fixedly installed on the relevant position of extruder, the for example radially both sides in the extruder head exit 41 described in the embodiment by extraneous support; Further, movable adjustment can be come through support in the position of two electrodes 11 of plate condenser 10, thereby 10 liang of interelectrode relative distances of adjustment plate condenser perhaps adapt to the differing heights of extruder.
In order to realize monitoring to the capacitance of plate condenser 10; On two electrodes 10 of plate condenser 10, draw a lead 30 respectively; Said lead 30 is welded on the back of electrode 10; A lead 30 prolongs and is connected to a utmost point of the capacitance voltage modular converter 21 in the capacitance measurement unit 20, and another root lead 30 prolongs and be connected to another utmost point of said capacitance voltage modular converter 21.
Measuring method of the present invention may further comprise the steps:
Aanalogvoltage output is measured and converted into to the capacitance of 21 pairs of said plate condensers 10 of capacitance voltage modular converter, and the aanalogvoltage and the capacitance of output are linear, and the magnitude of voltage of setting 21 outputs of capacitance voltage modular converter is V
x, capacitance
, m, n are definite value in the following formula concerning fixing system for one, therefore the magnitude of voltage V after changing
xWith capacitance C
xLinear;
Analog-to-digital conversion module 22 converts the analog voltage that receives into digital quantity;
23 pairs of said magnitude of voltage digital quantities of acquisition module are gathered in real time;
Obtain the capacitance of plate condenser according to the linear relationship of the magnitude of voltage digital quantity that collects and magnitude of voltage and capacitance.
The capacitance C that confirms according to formula 2
xAnd the functional relation between the thickness δ of extruded material calculates corresponding extruded material thickness δ.
Because the magnitude of voltage V after conversion
xWith capacitance C
xLinear, method for measuring thickness of the present invention also can be directly by magnitude of voltage V
xMeasure extruded material thickness δ, the step of this measuring method comprises:
Convert the capacitance that plate condenser detects into analog voltage through a capacitance voltage modular converter 21;
Through an analog-to-digital conversion module 22 said analog voltage is converted into digital quantity through analog-to-digital conversion;
Gather the digital quantity of said analog-to-digital conversion module 22 outputs in real time through an acquisition module 23;
According to magnitude of voltage digital quantity that collects and magnitude of voltage V
xWith the extruded material thickness C
xBetween functional relation confirm the respective thickness of extruded material.
Further as preferred embodiment, acquisition module 23 feeds back to extruder control system 50 with the digital quantity of the magnitude of voltage that collects.Preferably, capacitance measurement unit 20 adopts fixed form such as supports to fix, and receiving the capacitance that detects from plate condenser, and the digital quantity of magnitude of voltage is fed back to extruder control system 50.
The magnitude of voltage digital quantity of 50 pairs of feedbacks of extruder control system carries out continuous acquisition and record; Write down the extrusion temperature and the pressure and other parameters of current time simultaneously; Voltage-temperature and voltage-pressure and other parameters curve can be obtained, the pairing parameter of extruded product thickness can be confirmed according to these curves.The control system is through preestablishing needed thickness value, calculates corresponding voltage value, and magnitude of voltage and preset value that actual feedback is returned compare, and adjusts the parameter that temperature and pressure etc. influences extruded product thickness according to parameter curve.Through such closed-loop control system, can in extrusion, automatically adjust, can effectively promote the quality of extruded product.
Plastic product on-line thickness measuring method on the extruder of the present invention adopts plate condenser according to the variation that extruded material passes the capacitance that the zone causes between the plate condenser electrode, measures the thickness of extruded material.Because the reaction speed of capacitor is fast, certainty of measurement is high, and the characteristics of on-line measurement, but extensive use and extruder field of plastic products.And this measuring method does not contact the characteristics of extruded material, the thickness of can the surface measurements quality requirement very high film series products.
More than be that preferable enforcement of the present invention is specified; But the invention is not limited to said embodiment; Those of ordinary skill in the art can also make all equivalent variations or replacement under the prerequisite of spirit of the present invention, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (8)
1. plastic product on-line thickness measuring method on the extruder; The extruded material exit is provided with at least one plate condenser on the said extruder; Two electrodes of said plate condenser lay respectively at the both sides of extruded material; It is characterized in that, during the extruding of plastic material, measure the capacitance of plate condenser and confirm the respective thickness of extruded material by the functional relation of capacitance and extruded material thickness.
2. plastic product on-line thickness measuring method is characterized in that on a kind of extruder according to claim 1, and the capacitance of measuring said plate condenser may further comprise the steps:
Convert the capacitance that plate condenser detects into analog voltage through a capacitance voltage modular converter;
Through an analog-to-digital conversion module said analog voltage is converted into digital quantity through analog-to-digital conversion;
Gather the digital quantity of said analog-to-digital conversion module output in real time through an acquisition module;
Obtain the capacitance of plate condenser according to the linear relationship of the magnitude of voltage digital quantity that collects and magnitude of voltage and capacitance.
3. plastic product on-line thickness measuring method on a kind of extruder according to claim 1 is characterized in that: the functional relation of the capacitance of said plate condenser and extruded material thickness is:
In the following formula, δ is an extruded material thickness, ε
0Be the dielectric constant of air, ε
rBe the dielectric constant of extruded material, S is the relative area of capacity plate antenna two electrodes, and D is the relative distance of plate condenser two electrodes, C
xCapacitance for plate condenser.
4. plastic product on-line thickness measuring method on a kind of extruder according to claim 1, it is characterized in that: this measuring method may further comprise the steps:
Convert the capacitance that plate condenser detects into analog voltage through a capacitance voltage modular converter;
Through an analog-to-digital conversion module said analog voltage is converted into digital quantity through analog-to-digital conversion;
Gather the digital quantity of said analog-to-digital conversion module output in real time through an acquisition module;
Gather the digital quantity of said analog-to-digital conversion module output in real time through an acquisition module;
The respective thickness that magnitude of voltage that obtains according to the magnitude of voltage digital quantity that collects and capacitance voltage modular converter and the functional relation between the extruded material thickness are confirmed extruded material.
5. plastic product on-line thickness measuring method on a kind of extruder according to claim 4 is characterized in that: also comprise the step that the digital quantity of said acquisition module collection is fed back to extruder control system.
6. plastic product on-line thickness measuring method on a kind of extruder according to claim 1; It is characterized in that: said plate condenser is positioned at extruder head exit on the extruder, and two electrodes of said plate condenser radially are fixed on the symmetrical both sides in said extruder head exit through insulating materials.
7. plastic product on-line thickness measuring method on a kind of extruder according to claim 1; It is characterized in that: said plate condenser is positioned at extruder head exit on the extruder, and two electrodes of said plate condenser pass through the support fixed placement in symmetrical both sides radially, said extruder head exit.
8. plastic product on-line thickness measuring method on a kind of extruder according to claim 7 is characterized in that: two electrodes of said plate condenser can movable adjusting position through support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210090056.1A CN102601976B (en) | 2012-03-30 | 2012-03-30 | On-line measurement method for plastic product thickness on extruding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210090056.1A CN102601976B (en) | 2012-03-30 | 2012-03-30 | On-line measurement method for plastic product thickness on extruding machine |
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| CN102601976A true CN102601976A (en) | 2012-07-25 |
| CN102601976B CN102601976B (en) | 2014-09-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992002A (en) * | 2012-10-18 | 2013-03-27 | 吴江市元通纺织品有限公司 | Alarming device for conveyer belt |
| CN105365179A (en) * | 2015-11-10 | 2016-03-02 | 广州市香港科大霍英东研究院 | Online quality detection method for injection molding process |
| CN109342514A (en) * | 2018-09-04 | 2019-02-15 | 东莞弗兰德通信科技有限公司 | The dielectric constant measurement method and device of dielectric plastic |
| CN111457868A (en) * | 2020-03-19 | 2020-07-28 | 绵阳人众仁科技有限公司 | Film detection method based on microwave resonance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102992002A (en) * | 2012-10-18 | 2013-03-27 | 吴江市元通纺织品有限公司 | Alarming device for conveyer belt |
| CN105365179A (en) * | 2015-11-10 | 2016-03-02 | 广州市香港科大霍英东研究院 | Online quality detection method for injection molding process |
| CN109342514A (en) * | 2018-09-04 | 2019-02-15 | 东莞弗兰德通信科技有限公司 | The dielectric constant measurement method and device of dielectric plastic |
| CN111457868A (en) * | 2020-03-19 | 2020-07-28 | 绵阳人众仁科技有限公司 | Film detection method based on microwave resonance |
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