CN104441571A - Method for measuring temperature of polymer melt on screw rod surface - Google Patents
Method for measuring temperature of polymer melt on screw rod surface Download PDFInfo
- Publication number
- CN104441571A CN104441571A CN201410614451.4A CN201410614451A CN104441571A CN 104441571 A CN104441571 A CN 104441571A CN 201410614451 A CN201410614451 A CN 201410614451A CN 104441571 A CN104441571 A CN 104441571A
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- Prior art keywords
- screw
- measured
- temperature
- signal
- temperature sensor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—Measuring, controlling or regulating
- B29B7/726—Measuring properties of mixture, e.g. temperature or density
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7604—Temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/7618—Injection unit
- B29C2945/76187—Injection unit screw
-
- 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
- B29C2948/92209—Temperature
-
- 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
- B29C2948/92361—Extrusion unit
- B29C2948/9238—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/9239—Screw or gear
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a method for measuring temperature of a polymer melt on a screw rod surface. The method comprises the steps as follows: a radial measurement hole is formed in a to-be-measured region of a to-be-measured hollow screw rod of screw rod type polymer processing equipment; a temperature sensor is arranged in the formed measurement hole; a signal wire of the temperature sensor is led out from a power input end of a to-be-measured hollow screw rod and is connected to a signal conversion and transmission box; when a machine runs, the temperature sensor transmits a temperature signal to a signal receiver on an external data collection system in an electromagnetic wave form through the signal conversion and transmission box; and automatic collection of the temperature signal of the polymer melt on the screw rod surface is achieved. Through adoption of the method disclosed by the invention, the defect in the existing temperature measurement technology that the temperature of the melt on the screw rod surface is difficult to measure at the working speed can be overcome; and a new way is provided for real-time monitoring of the melt temperature in the screw rod type polymer processing equipment.
Description
Technical field
The present invention relates to mechanical chemical industry technical field, particularly relate to a kind of method measuring screw surface polymer-melt temperature.
Background technology
In Polymer Processing is shaping, accurately measures and control melt temperature, is the necessary means ensureing product quality, carry out process optimization.In screw polymer-processing equipment, the uniformity of melt conveying zone melt temperature has material impact to product quality.Scientific research and production practices show, at the melt conveying zone of screw polymer-processing equipment, on same cross section, the melt temperature of different radial position is not identical, and the temperature difference can reach more than 10 DEG C sometimes.The melt temperature of different radial position on the same cross section of Measurement accuracy melt conveying zone, and then grasp its Temperature Distribution, structure is improved and process optimization all extremely important.
At present in the shaping scientific research of Polymer Processing and production practices, the method of the measurement melt temperature generally adopted offers measured hole on the actionless parts such as machine barrel, head connector, mouth mould, install the temperature element such as thermocouple, RTD, the signal of temperature element collection passes to data collecting system by holding wire.The method of this sensor installation on stationary parts can only measure the melt temperature near machine barrel internal face, cannot obtain the Multipoint synchronous temperature value of different radial position on same cross section.
In order to measure the melt temperature of different radial position on same cross section, in recent years, some researchers creatively applied thermocouple network technology, infrared induction thermometry, ultrasonic temperature measurement technology, fluorescence thermometry and nuclear magnetic resonance thermometry.Also some researcher designs and moves radially lever apparatus and cam gear, and for installing thermocouple, in measurement screw channel, Different Diameter is to the melt temperature of position.
Thermocouple network technology is only applicable to measure the Temperature Distribution do not had on the cross section of rotating member, the different cross sections in such as screw rod end and mouth mould.Infrared induction thermometry, ultrasonic temperature measurement technology, fluorescence thermometry and nuclear magnetic resonance thermometry all belong to contactless measurement, signal response speed is fast, and sensor is noiseless to tested flow field, but test macro complex and expensive, seldom adopt in industrial practice, be mainly limited to laboratory research.Move radially bar and cam temperature measuring equipment can only be used for the lower occasion of screw speed, limitation is large.And this several relatively new multipoint temperature measuring method has a common ground, namely temperature sensor or whole temperature measuring equipment are also mounted on the static hardware of machine, and collected signal also passes to data collecting system by holding wire.Obviously, when measuring point is more, holding wire quantity will be multiplied, thus cause data collecting system more complicated, increase the complexity of whole experimental system or production equipment.
Summary of the invention
The object of this invention is to provide a kind of method measuring screw surface polymer-melt temperature, object is to overcome the deficiency that existing thermometry is difficult to screw surface melt temperature under surveying work rotating speed, in screw polymer-processing equipment, the real-time monitoring of melt temperature provides new means.
The object of the invention is to be achieved through the following technical solutions:
Measure a method for screw surface polymer-melt temperature, the method comprises:
Offer radial measurement hole in the region to be measured of screw polymer-processing equipment hollow screw to be measured, and in the measured hole offered set temperature sensor;
The holding wire of described temperature sensor is drawn from the power intake of described hollow screw to be measured and is connected to signal conversion with launch-box;
During machine run, temperature signal to be passed to the signal receiver in external data acquisition system by described temperature sensor by electromagnetic wave with launch-box by signal conversion, realize the automatic collection of screw surface polymer-melt temperature signal.
Further, described screw polymer-processing equipment is the polymer-processing equipment with screw element, comprising: singe screw, twin-screw, multiscrew and Planetary Screw Extruder, and two-rotor continuous mixer and screw injection molding machine.
Further, the region to be measured in described hollow screw to be measured is arranged on the difference in functionality element of hollow screw to be measured, comprising: the screw thread delivery element of hollow, and has the hollow screw element of fusion plastification, exhaust, mixing, temperature homogenisation function.
Further, the number in radial measurement hole is offered in described region to be measured is one or offers multiple along same cross section; Described radial measurement hole is opened in root footpath place and/or the outer radius of hollow screw element, comprising: on the root of hollow screw element and/or spiral shell rib.
Further, during described machine run, the holding wire of described temperature sensor, described temperature sensor and signal are changed with launch-box along with described hollow screw to be measured together rotates.
Further, the conversion of described signal is mechanically connected pattern with launch-box by screw thread or other and is fixedly connected with described hollow screw to be measured.
As seen from the above technical solution provided by the invention, method provided by the invention directly can measure the melt temperature on hollow screw surface to be measured, thus expands the measurement category of melt temperature on a certain cross section in screw polymer-processing equipment; Meanwhile, measuredly pass to data collecting system in a non contact fashion by electromagnetic wave, do not increase the quantity of machine peripheral signal line and arrange difficulty; In addition, when measuring the melt temperature of screw surface, temperature sensor probe can suitably stretch in melt stream, thus can measure the melt temperature of different radial position on same cross section easily; In this case, because temperature sensor rotates with screw rod, can not move interference between the stationary parts of screw polymer-processing equipment and temperature sensor probe, the degree of depth that thus sensor probe stretches into melt stream can adjust in a big way, and can not be damaged.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
A kind of flow chart measuring the method for screw surface polymer-melt temperature that Fig. 1 provides for the embodiment of the present invention;
A kind of schematic diagram measuring the method for screw surface polymer-melt temperature that Fig. 2 provides for the embodiment of the present invention;
The schematic diagram of radial measurement hole place partial enlargement in the hollow screw that Fig. 3 provides for the embodiment of the present invention;
The schematic diagram of the junction of the signal conversion that Fig. 4 provides for the embodiment of the present invention and launch-box and hollow screw power intake.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
Embodiment
A kind of method flow diagram measuring screw surface polymer-melt temperature that Fig. 1 provides for the embodiment of the present invention one.As shown in Figure 1, the method mainly comprises the steps:
Step 11, offer radial measurement hole in the region to be measured of screw polymer-processing equipment hollow screw to be measured, and in the measured hole offered set temperature sensor.
In the embodiment of the present invention, described screw polymer-processing equipment is for having the polymer-processing equipment of (hollow) screw element, comprise: singe screw, twin-screw, multiscrew and Planetary Screw Extruder, and two-rotor continuous mixer and screw injection molding machine etc.
Region to be measured in described hollow screw to be measured can be arranged on the difference in functionality element of hollow screw to be measured, comprising: the screw thread delivery element of hollow, and has the hollow screw element of the functions such as fusion plastification, exhaust, mixing, temperature homogenisation.
Exemplary, common cannulated threaded delivery element can be the melt conveying zone of single screw extrusion machine; Have the mixing hollow screw element with temperature homogenisation function can for pineapple head element, pin device, toothed element, be separated screw element etc.; There is fusion plastification function, the hollow screw element of degassing function can for kneading disk, reverse-flight elements, S shape screw element etc.
The number that radial measurement hole is offered in described region to be measured is one or offers multiple along same cross section; Described radial measurement hole is opened in root footpath place and/or the outer radius of hollow screw element, comprising: on the root of hollow screw element and/or spiral shell rib.
In addition, some new polymers process equipments, such as vane type extruder, also can utilize method provided by the invention to measure the melt temperature on rotatable parts surface.It should be noted that, the region to be measured of hollow screw to be measured is come specifically to specify by user according to the actual requirements.
The holding wire of step 12, described temperature sensor is drawn from the power intake of described hollow screw to be measured and is connected to signal conversion with launch-box.
In the embodiment of the present invention, if having multiple radial measurement hole, in each radial measurement hole, the type of temperature sensor can be identical, also can be different.
In the embodiment of the present invention, described signal conversion can be mechanically connected pattern by screw thread or other with launch-box and be fixedly connected with described hollow screw to be measured.
When step 13, machine run, temperature signal to be passed to the signal receiver in external data acquisition system by described temperature sensor by electromagnetic wave with launch-box by signal conversion, realize the automatic collection of screw surface polymer-melt temperature signal.
In the above embodiment of the present invention, when machine run, the holding wire of described temperature sensor, described temperature sensor and signal are changed with launch-box along with described hollow screw to be measured together rotates.
For the ease of understanding, can see accompanying drawing 2-4.Wherein, the schematic diagram of the method that Fig. 2 provides for the embodiment of the present invention, Fig. 3 is the partial enlarged drawing at radial measurement hole place in hollow screw, and Fig. 4 is the connection enlarged drawing of signal conversion and launch-box and hollow screw power intake.In Fig. 2-Fig. 4, Reference numeral 1 represents hollow screw to be measured, mark 2 represents radial measurement hole, mark 3 is for being arranged on the temperature sensor in radial measurement hole, mark 4 is the holding wire of temperature sensor, mark 5 is signal conversion and launch-box, and mark 6 is external data acquisition system, and mark 7 is signal receiver.
Specifically, the temperature sensor 3 in hollow screw 1 shown in Fig. 2 can be threaded connection and be arranged in radial measurement hole 2; During mounting temperature sensor 3, first the holding wire 4 on temperature sensor 3 is stretched into hollow screw 1 from radial measurement hole 2, when holding wire 4 arrives the power intake of hollow screw 1, it is fixed with the respective terminal sub-connection on launch-box 5 with signal conversion, afterwards temperature sensor 3 is arranged in radial measurement hole 2; After all temperature sensors 3 and holding wire 4 thereof are all installed and are fixed, again signal conversion is threaded connection with launch-box 5 power intake being arranged on hollow screw 1, for receiving in signal receiver 7 data collecting system 6 mounted externally of the electromagnetic wave signal that the conversion of described signal is launched with launch-box 5, the temperature signal spread out of with launch-box 5 can be changed by real-time reception signal, and be passed to external data acquisition system 6.
The temp measuring method that the embodiment of the present invention provides has the following advantages compared with existing temp measuring method:
One, directly can measure the melt temperature of the screw surface such as screw root, spiral shell rib top.Melt temperature in usual screw polymer-processing equipment on a certain cross section or the melt temperature in certain screw channel cross section are uneven, near machine tube inner wall face and the melt temperature near the melt temperature of screw surface and stream central area different.Utilize method provided by the invention directly can measure the melt temperature of screw surface, thus expand the measurement category of melt temperature on a certain cross section in screw polymer-processing equipment.
Its two, when utilizing method provided by the invention to measure the melt temperature of screw surface, measuredly pass to data collecting system in a non contact fashion by electromagnetic wave, do not increase the quantity of machine peripheral signal line and arrange difficulty.
Its three, utilize method provided by the invention can measure the melt temperature of different radial position on same cross section easily.In conventional methods where, temperature sensor is arranged in the stationary elements such as machine barrel, when temperature probe stretches into melt stream, and the impact of spiral shell rib when take into full account bolt rotary, avoid sensor probe impaired, this degree of depth stretching into melt stream that makes to pop one's head in is limited in very among a small circle.When utilizing method provided by the invention to measure the melt temperature of screw surface, temperature sensor probe can suitably stretch in melt stream; In this case, because temperature sensor rotates with screw rod, can not move interference between the stationary parts of screw polymer-processing equipment and temperature sensor probe, the degree of depth that thus sensor probe stretches into melt stream can adjust in a big way, and can not be damaged
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. measure a method for screw surface polymer-melt temperature, it is characterized in that, the method comprises:
Offer radial measurement hole in the region to be measured of screw polymer-processing equipment hollow screw to be measured, and in the measured hole offered set temperature sensor;
The holding wire of described temperature sensor is drawn from the power intake of described hollow screw to be measured and is connected to signal conversion with launch-box;
During machine run, temperature signal to be passed to the signal receiver in external data acquisition system by described temperature sensor by electromagnetic wave with launch-box by signal conversion, realize the automatic collection of screw surface polymer-melt temperature signal.
2. method according to claim 1, it is characterized in that, described screw polymer-processing equipment is the polymer-processing equipment with screw element, comprising: singe screw, twin-screw, multiscrew and Planetary Screw Extruder, and two-rotor continuous mixer and screw injection molding machine.
3. method according to claim 1, it is characterized in that, region to be measured in described hollow screw to be measured is arranged on the difference in functionality element of hollow screw to be measured, comprise: the screw thread delivery element of hollow, and there is the hollow screw element of fusion plastification, exhaust, mixing, temperature homogenisation function.
4. method according to claim 1, is characterized in that, the number that radial measurement hole is offered in described region to be measured is one or offers multiple along same cross section; Described radial measurement hole is opened in root footpath place and/or the outer radius of hollow screw element, comprising: on the root of hollow screw element and/or spiral shell rib.
5. method according to claim 1, is characterized in that, during described machine run, the holding wire of described temperature sensor, described temperature sensor and signal are changed with launch-box along with described hollow screw to be measured together rotates.
6. method according to claim 1 or 5, is characterized in that, described signal conversion is mechanically connected pattern with launch-box by screw thread or other and is fixedly connected with described hollow screw to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410614451.4A CN104441571A (en) | 2014-11-04 | 2014-11-04 | Method for measuring temperature of polymer melt on screw rod surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410614451.4A CN104441571A (en) | 2014-11-04 | 2014-11-04 | Method for measuring temperature of polymer melt on screw rod surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104441571A true CN104441571A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410614451.4A Pending CN104441571A (en) | 2014-11-04 | 2014-11-04 | Method for measuring temperature of polymer melt on screw rod surface |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908100A (en) * | 2017-03-16 | 2017-06-30 | 西安近代化学研究所 | A kind of whole field parameters test device of kneader |
| CN111605162A (en) * | 2020-05-20 | 2020-09-01 | 苏州威瑞成新材料有限公司 | Temperature control system of double-screw extruder and use method thereof |
| CN114872225A (en) * | 2022-07-11 | 2022-08-09 | 如皋市中如新材料科技有限公司 | Preparation equipment and process of PVC flame-retardant plastic particles for wires and cables |
| CN115431480A (en) * | 2022-08-30 | 2022-12-06 | 广东力劲塑机智造股份有限公司 | Device for measuring and improving temperature uniformity of injection molding melt and using method thereof |
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| CN102865827A (en) * | 2012-06-29 | 2013-01-09 | 杭州珏光物联网科技有限公司 | Fiber Bragg grating strain sensor |
| CN203719732U (en) * | 2014-02-28 | 2014-07-16 | 金川集团股份有限公司 | Water level detection device for solar energy water tank |
| CN104089729A (en) * | 2014-07-23 | 2014-10-08 | 上海市建筑科学研究院 | Stress monitoring sensor and method for connecting bolt of fiber bragg grating structure |
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2014
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| JP3820412B2 (en) * | 1996-05-10 | 2006-09-13 | 国立大学法人 東京大学 | Screw for measuring temperature distribution in groove of molding machine and molding machine |
| CN102865827A (en) * | 2012-06-29 | 2013-01-09 | 杭州珏光物联网科技有限公司 | Fiber Bragg grating strain sensor |
| CN203719732U (en) * | 2014-02-28 | 2014-07-16 | 金川集团股份有限公司 | Water level detection device for solar energy water tank |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908100A (en) * | 2017-03-16 | 2017-06-30 | 西安近代化学研究所 | A kind of whole field parameters test device of kneader |
| CN111605162A (en) * | 2020-05-20 | 2020-09-01 | 苏州威瑞成新材料有限公司 | Temperature control system of double-screw extruder and use method thereof |
| CN111605162B (en) * | 2020-05-20 | 2022-06-10 | 安徽威普达材料科技有限公司 | Temperature control system of double-screw extruder and use method thereof |
| CN114872225A (en) * | 2022-07-11 | 2022-08-09 | 如皋市中如新材料科技有限公司 | Preparation equipment and process of PVC flame-retardant plastic particles for wires and cables |
| CN115431480A (en) * | 2022-08-30 | 2022-12-06 | 广东力劲塑机智造股份有限公司 | Device for measuring and improving temperature uniformity of injection molding melt and using method thereof |
| CN115431480B (en) * | 2022-08-30 | 2024-08-30 | 广东力劲塑机智造股份有限公司 | Injection molding melt temperature uniformity measuring and improving device and application method thereof |
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Application publication date: 20150325 |
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