CN101234524A - Method and device for on-line testing relationship of polyalcohol pressure, specific volume and temperature - Google Patents
Method and device for on-line testing relationship of polyalcohol pressure, specific volume and temperature Download PDFInfo
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- CN101234524A CN101234524A CNA2007100634613A CN200710063461A CN101234524A CN 101234524 A CN101234524 A CN 101234524A CN A2007100634613 A CNA2007100634613 A CN A2007100634613A CN 200710063461 A CN200710063461 A CN 200710063461A CN 101234524 A CN101234524 A CN 101234524A
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 150000005846 sugar alcohols Polymers 0.000 title description 2
- 229920000642 polymer Polymers 0.000 claims abstract description 68
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 36
- 238000006073 displacement reaction Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000001746 injection moulding Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 4
- 238000011017 operating method Methods 0.000 claims description 2
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- 230000000875 corresponding effect Effects 0.000 description 4
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- 238000010998 test method Methods 0.000 description 4
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- 229910052753 mercury Inorganic materials 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 230000002596 correlated effect Effects 0.000 description 1
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- 229920002521 macromolecule Polymers 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a method for testing relationship among pressure-specific volume-temperature of polymer on line and a device thereof, which adopts a testing device consisting of a die, a pressure sensor, a temperature sensor, a displacement sensor, a heating rod and a cavity switch. The testing device is arranged in a die matching system of an injection machine for utilization. In the online testing, the conditions of injection and forming process can be consistent with actual processing process and at the same time die shape of the testing device is the same with the die shape of processing products. The relationship among the pressure-the specific volume-the temperature can truly reflects the tested relationship among the pressure-the specific volume-the temperature under the condition of the actual injection and forming process. The relationship among the pressure-the specific volume-the temperature and tested online can be used for guiding formulation of parameters of the injection and forming process for polymer products or designing the dies of the products and analyzing by CAE.
Description
Technical field
The present invention relates to a kind of polyalcohol pressure (P), specific volume (V), temperature (T) and concern on-line testing method and device, particularly relate to a kind of method of testing and device that is used for the P-V-T relation of injection machine on-line testing polymer.
Background technology
Injection machine mainly is made of mould, adapted to injection system, matched moulds system, hydraulic drive and electric control system, and mould mainly is made up of quiet template, moving platen, core, running gate system, guidance system, positioning and fixing parts and the demoulding system of loosing core.Mould is installed on the matched moulds plate of matched moulds system and uses.Pressure, temperature, time are the principal elements of impact polymer injection molding process.Under the certain situation of polymer raw materials, mould structure, injection-mold process parameter has a direct impact quality of item.The pressure of polymer, specific volume, temperature relation, promptly the pass between the P-V-T be injection-molded process parameter setting and analyze the reason that produces defectives such as warpage, contraction, bubble fault in the goods processing foundation be provided.
Polymer P-V-T tester is a kind of instrument that is used to measure polymer specific volume and pressure, specific volume and functional relationship of temperature.Specific volume and pressure and specific volume and functional relationship of temperature be by P-V-T curve map reflection, can obtain the information of the aspects such as density, specific volume, compressibility, the coefficient of cubical expansion and state equation of polymer intuitively from the P-V-T curve map of polymer.Polymer P-V-T parameter testing technology has direct pressurization and the two kinds of method of testings of pressurizeing indirectly at present, for example: the Piston-cylinder technology of German SWO company and the Confining fluid technology of Gnomix company can be summed up as direct pressurization and two kinds of method of testings of pressurization indirectly respectively.Money is Chinese-English to wait the people in " polymer P VT concerns determination techniques " (Chinese plastics, 1996,10 (2): report 63) difference of these two kinds of methods is whether the instrument pressurizing piston directly contacts with polymer sample.Charge into liquid medium in indirect method in the piston cylinder, sample floats in the liquid medium, and piston is exerted pressure to polymer sample by liquid medium or heated, cools off.Generally in direct method was measured, the volume of sample analyzer only need be measured displacement height.Indirect method is measured owing to will use liquid medium, and the variation of volume of sample is that the measurement by the liquid medium Volume Changes obtains by analysis, and the density of being measured is relative value, liquids in general medium with water silver, and mercury exists toxicity, leakage problem.Using in addition also needs in the mensuration process of mercury medium to get rid of the air that exists in the liquid medium by vacuum.When direct method is measured, can reach 420 ℃ according to the technological parameter temperature of polymer processing, pressure can reach 250MPa, but not direct method when measuring because liquid medium mercury, temperature is the highest can only to be 350 ℃.
The instrument and equipment that adopts above two kinds of methods all is to test at polymer samples.But also all have a problem: the actual machining process of the test condition of polymer samples and polymer is inconsistent, therefore to instruct the formulation of injection-mold process parameter be not accurate enough to the polymer P-V-T curve that obtains by these technical testings, polymer P-V-T curve is used for the mould design and cae analysis also just there are differences.Especially in the epoch of current CAD/CAE/CAM technology develop rapidly, the P-V-T data of polymer more can truly reflect the actual conditions of polymer in the process, and computer simulation results just can heal accurately.When analyzing with CAE software, can only obtain quite rough result if carry out analog computation abroad with the polymeric material properties data that provides, therefore be necessary to carry out the P-V-T parameter measurement according to China's polymeric material commonly used, it is just very meaningful to set up polymer P-V-T database on this basis.And, more than two kinds of methods all be to be that carrier is realized polymer P-V-T relation test by special instrument, need the special experimental instrument and equipment of design, also to be ready to specimen specially before the test.These have brought inconvenience all for the mensuration of polymer P-V-T relation.
At present, the technology of testing on injection machine has had a lot, be included in some correlation techniques that setting pressure sensor and temperature sensor come pressure and temperature in the on-line measurement die cavity in the mould, measuring all is at injection machine process control of process parameters.But concern at polymer P-V-T and also not see the report of the on-line testing technology that is specifically designed to injection machine aspect the measurement.
Summary of the invention
The purpose of this invention is to provide a kind of method and device that can be used for on-line testing polymer pressure-specific volume-temperature relation on the injection machine, the present invention can be under the injection molding process condition, the online P-V-T parameter value that directly records polymer in the cavity body of mould.
The technical scheme of the method for on-line testing polymer pressure-specific volume-temperature relation of the present invention has adopted the testing arrangement that is made of mould, pressure sensor, temperature sensor, displacement transducer, heating rod and die cavity switch, testing arrangement is installed in the matched moulds system of injection machine, in the injection machine injection molding process, the polymer pressure-specific volume-temperature relation test operating procedure is as follows:
(1) by injection machine matched moulds system matched moulds;
(2) be injected in the die cavity of mould by the tested polymer of injection machine adapted to injection system molten condition;
(3) drive the die cavity switch, die cavity is closed;
(4) according to test process parameter is set, system pressurizes by the injection machine matched moulds, utilize the heating rod of testing arrangement that mould is heated, gather pressure, temperature and the displacement data of tested polymer by pressure sensor, temperature sensor and displacement transducer in good time;
(5) data that collect are passed through the pressure-specific volume-temperature curve map that Computer Processing obtains tested polymer;
(6) continue to finish the injection technique process cooling, die sinking, eject and the operating process of die cavity switch open.
The inventive method, the test process of injection machine on-line testing polymer pressure-specific volume-temperature relation are that equipressure is lowered the temperature-boosted, isobaric cooling-step-down, equipressure heat up-boost, equipressure intensification-step-down, isothermal are boosted-lowered the temperature, isothermal boosts-heats up, isothermal step-down-cooling, isothermal step-down-intensification.
Testing arrangement of the present invention is made of mould, pressure sensor, temperature sensor, displacement transducer, heating rod and die cavity switch; Mould mainly is made up of quiet template, moving platen, core, running gate system, guidance system, positioning and fixing parts and the demoulding system of loosing core, and the die cavity that core and quiet template form has one section straight section that cross-sectional area is constant in the matched moulds direction; Pressure sensor and temperature sensor are arranged on the quiet template and core of mould, and displacement transducer is arranged between the quiet template and moving platen of mould; Heating rod and cooling water channel are arranged on the quiet template and moving platen of mould; The die cavity switch is made of die cavity switch valve, contiguous block and driving hydraulic cylinder, and the die cavity switch is fixed between the quiet template and solid plate of mould.
The die cavity switch valve of the mould of apparatus of the present invention is that stairstepping is arranged in the step trough of offering on the quiet template of mould, and the leading portion of die cavity switch valve has through hole, is provided with relief hole and communicates with step trough on the quiet template of mould.
Device of the present invention, the die cavity switch valve of mould are arranged in the step trough of offering on the quiet template of mould, and the die cavity switch valve is a stairstepping, and the leading portion of die cavity switch valve has through hole, be provided with relief hole and communicate with step trough on the quiet template of mould; The die cavity switch valve is when opening position: through hole communicates with the sprue and the cast gate of mould, and the die cavity switch valve is when closing position: through hole communicates with relief hole.
Polymer P-V-T parameter on-line testing method that the present invention proposes, also belong to a kind of direct pressurization according to principle, but it be under the injection molding process condition to die cavity in tested polymer directly pressurize, test in the process of step-down or heating, cooling.On-line testing not only injection molding process condition can be consistent with actual process; And the mould of the testing arrangement of use is identical with the mold shape of fabricated product, and the P-V-T data that record can reflect the P-V-T data under the actual injection molding process condition more realistically.
Description of drawings
Fig. 1 is the device front view of on-line testing polymer pressure-specific volume-temperature relation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Among the figure: 1, pressure sensor, 2, temperature sensor, 3, displacement transducer, 4, heating rod, 5, quiet template, 6, moving platen, 7, core, 8, tested polymer, 9, the die cavity switch valve, 10, contiguous block, 11, drive hydraulic cylinder, 12, solid plate, 13, step trough, 14, through hole, 15, relief hole, 16, sprue, 17, cast gate, 18, cooling water channel, 19, straight section.
The specific embodiment
Testing arrangement of the present invention is made of mould, pressure sensor 1, temperature sensor 2, displacement transducer 3, heating rod 4 and die cavity switch shown in Fig. 1～2.Mould the same with common mould it mainly form by quiet template 5, moving platen 6, core 7, running gate system, guidance system, positioning and fixing parts and the demoulding system of loosing core.What the present invention was different with common mould is that quiet template 5, moving platen 6 and core 7 have been carried out following repacking, make pressure sensor 1, temperature sensor 2, displacement transducer 3, heating rod 4 and die cavity switch and mould can be assembled into one, make testing arrangement possess essential test function.On the quiet template 5 of mould, core 7, have the hole of sensor installation, pressure sensor 1, temperature sensor 2 are installed on the mould in the corresponding installing hole, the measuring head of pressure sensor 1 and temperature sensor 2 can directly contact with tested polymer 8, can record pressure, the variation of temperature of tested polymer 8 in the die cavity; Displacement transducer 3 is arranged between the quiet template 5 and moving platen 6 of mould, measures the relative displacement between quiet template 5 and the moving platen 6.The die cavity switch is by die cavity switch valve 9, contiguous block 10 and drive hydraulic cylinder 11 and constitute, and the die cavity switch is fixed between the solid plate 12 in the positioning and fixing parts of the quiet template 5 of mould and mould.The die cavity switch valve of mould is arranged in the step trough of offering on the quiet template 5 of mould 13.Die cavity switch valve 9 is a stairstepping, and the leading portion of die cavity switch valve 9 has through hole 14, offers relief hole 15 on the quiet template 4, and relief hole 15 communicates with step trough 13.The die cavity switch valve 9 of die cavity switch drives by driving hydraulic cylinder 11, makes the straight line back and forth movement in the step trough 13 of die cavity switch valve 9 on the quiet template 4 of mould, realizes the switch control of mould sprue 16 with cast gate 17 by driving hydraulic cylinder 11.When die cavity switch valve 9 was opened, the through hole 14 of the leading portion of die cavity switch valve 9 communicated with cast gate 17 with the sprue 16 of mould; When test, die cavity switch valve 9 cuts out the sprue 16 and the cast gate 17 of mould, to guarantee the constant mass of tested polymer 8; After die cavity was closed, the clout in the through hole 14 on the die cavity switch valve 9 was pressed against a side of step trough 13, and this moment, through hole 14 communicated with relief hole 16.After the die sinking, the ejecting mechanism by the matched moulds system ejects clout along relief hole 15.Be furnished with cooling water channel 18 on the quiet template 5 of mould and moving platen 6, cooling water channel 18 external temperature control cooling waters are controlled the temperature of mould with the cooling water in heating rod 7 and the cooling water channel 18.
Displacement transducer 1 can be selected commercially available magnetostrictive displacement sensor as shown in fig. 1 for use, and its stationary part is fixed on the quiet template 5 of mould, and its standing part is supported on the support on the moving platen 6.Fig. 1～Fig. 2 is an example of the testing arrangement of the bowl-shape goods of injection moulding.The die cavity that is full of from tested polymer 8 as can be seen, core 7 forms a bowl-shape die cavity with quiet template 5, its the rim of a bowl place has one section to be that the constant straight section of cross-sectional area 19 is cylindric, because the cross section of straight section 19 is changeless when matched moulds, by the relative displacement between displacement transducer 3 quiet templates 5 of mensuration and the moving platen 6, obtain the variation of volume by the variation of displacement, can be scaled the variation of specific volume.Method of the present invention also is fit to measure the goods of other shape, but owing to the requirement to the volume test, all needs die cavity that one section straight section that cross section is constant is arranged except that the test that is applicable to bowl-shape goods.
Method of the present invention is after polymer is filled with die cavity, pressure, temperature, the displacement parameter of polymer in the test die cavity, and the data of collecting pressure, temperature, displacement that can be in good time obtain the situation of change of pressure, temperature, specific volume.Measured data record is finished, data are handled, draw the P-V-T graph of relation of polymer; Or sensor connected with computer by ad/da converter, utilize computer processing data, again by software programming, generate the P-V-T graph of relation of polymer.According to the polymer P that draws-V-T curve map, can get information about the information of the aspects such as density, specific volume, compressibility, the coefficient of cubical expansion and state equation of polymer with this.Can be with the accuracy of its macromolecule thermodynamical model studied of checking and state equation etc., simultaneously can be with other correlated performance parameter of the data computation that records, set up database, to instruct computer simulation as CAE softwares such as Moldflow/Mold, the final guidance formulation injection molding process of realizing, reduce the forming defect of goods, improve quality of item.
Polymer P provided by the invention-V-T parameter on-line testing method has the following advantages:
(1) the matched moulds system that has made full use of injection machine controls the variation of pressure in the mould cavity, and test is simple, directly.
(2) data that obtain under actual injection molding process condition more can reflect the P-V-T of polymer under the injection molding process condition; Help the processing and forming of polymer is instructed, the better choice injection-mold process parameter, thus reduce the defective of goods in the injection mo(u)lding, improve quality of item; The data that obtain under actual injection molding process condition gear to actual circumstances more, also just help improving the accuracy of computer simulation more, more help CAE software and carry out Data Management Analysis, and instruct the mould design.
(3) existing measuring technology all is to measure at polymer samples, and the present invention directly measures the polymer that is used for the product molding process, has accuracy and specific aim.
Method of testing of the present invention and device can be implemented in line to the pressure, volume, temperature parameter of polymer in the mould cavity carry out that equipressure is lowered the temperature-boosted, isobaric cooling-step-down, equipressure heat up-boost, equipressure intensification-step-down, isothermal are boosted-lowered the temperature, isothermal boosts-heats up, isothermal step-down-cooling, isothermal step-down-multiple different test process such as intensification, obtain corresponding polymer P-V-T parametric plot.
With the equipressure test process of lowering the temperature-boost is that example describes test process, after testing arrangement being installed in the matched moulds system of injection machine, set injection technological parameter, earlier behind the several goods of injection molding technique flow process moulding according to routine, begin the mensuration to the P-V-T parameter of tested polymer, testing procedure is as follows:
(1) by injection machine matched moulds system matched moulds.
(2) be injected in the die cavity of mould by the tested polymer of injection machine adapted to injection system molten condition.
(3) utilize the die cavity switch die cavity to be closed at sprue and cast gate place.
(4) by equipressure lower the temperature-the boost temperature of test process and the variation of displacement, according to test process parameter is set, system pressurizes by the injection machine matched moulds, utilize the heating rod of testing arrangement that mould is heated, gather pressure, temperature and the displacement data of tested polymer by pressure sensor, temperature sensor and displacement transducer in good time.Initial pressure is made as 0MPa, records the numerical value of constant pressure temperature and displacement under 0MPa by temperature sensor and displacement transducer in good time, and each temperature reduction value is made as definite value, writes down one time shift value, and shift value is converted, and obtains corresponding specific volume.As required, initial temperature is the highest usually is set to 400 ℃, and each temperature reduction value can be made as 20 ℃, obtains a constant pressure at last at the temperature of 0MPa and the relation curve of specific volume.The constant pressure that can raise again then is to next setting value, promptly records the numerical value of temperature and displacement under one group of different constant pressure.General maximum pressure can be set to 200MPa, and each pressure lift-off value can be made as 40MPa.Gather this sets of curves, obtain the P-V-T graph of relation of tested polymer.
(5) operation that continue to finish the cooling of injection technique flow process, die sinking, ejects, the die cavity switch open.So far, EOT.
The test process that above-mentioned test process is called equipressure lowers the temperature-boost, these pressure drop temperature-process of boosting is consistent with the technical process of goods process.The test P-V-T relation that obtains meets the actual injection molding process condition of injection machine the most, and therefore resulting data are the variations that can reflect polymer P-V-T in forming process.
The operation of step (4) can be only changed as required to above-mentioned test process, just equipressure cooling-step-down can be carried out.For example step (4) is according to following operation: initial pressure is made as 200MPa, record the numerical value of constant pressure temperature and displacement under 200MPa by temperature sensor and displacement transducer in good time, each temperature depreciation is made as definite value, write down one time shift value, shift value is converted, obtain corresponding specific volume.As required, initial temperature is the highest usually is set to 400 ℃, and each temperature reduction value can be made as 20 ℃, obtains a constant pressure at last at the temperature of 200MPa and the relation curve of specific volume.Can reduce constant pressure then again to next setting value, promptly record the numerical value of temperature and displacement under one group of different constant pressure.Each pressure reduction value can be made as 40MPa.Gather this sets of curves, promptly obtain the P-V-T graph of relation of the tested polymer of isobaric cooling-step-down process.By that analogy, can obtain also that equipressure heats up-boosts, isobaric intensification-step-down, isothermal are boosted-are lowered the temperature, isothermal boosts-heats up, the P-V-T graph of relation of the tested polymer of isothermal step-down-cooling, isothermal step-down-processes such as intensification.
Claims (4)
1. the method for on-line testing polymer pressure-specific volume-temperature relation, it is characterized in that: adopted the testing arrangement that constitutes by mould, pressure sensor, temperature sensor, displacement transducer, heating rod and die cavity switch, testing arrangement is installed in the matched moulds system of injection machine, in the injection machine injection molding process, the polymer pressure-specific volume-temperature relation test operating procedure is as follows:
(1) by injection machine matched moulds system matched moulds;
(2) be injected in the die cavity of mould by the tested polymer of injection machine adapted to injection system molten condition;
(3) drive the die cavity switch, die cavity is closed;
(4) according to test process parameter is set, system pressurizes by the injection machine matched moulds, utilize the heating rod of testing arrangement that mould is heated, gather pressure, temperature and the displacement data of tested polymer by pressure sensor, temperature sensor and displacement transducer in good time;
(5) data that collect are passed through the pressure-specific volume-temperature curve map that Computer Processing obtains tested polymer;
(6) continue to finish the injection technique process cooling, die sinking, eject and the operating process of die cavity switch open.
2. method according to claim 1 is characterized in that: the test process of injection machine on-line testing polymer pressure-specific volume-temperature relation is that equipressure is lowered the temperature-boosted, isobaric cooling-step-down, equipressure heat up-boost, equipressure intensification-step-down, isothermal are boosted-lowered the temperature, isothermal boosts-heats up, isothermal step-down-cooling, isothermal step-down-intensification.
3. be used for the testing arrangement of the described method of claim 1, it is characterized in that: testing arrangement is made of mould, pressure sensor, temperature sensor, displacement transducer, heating rod and die cavity switch; Mould mainly is made up of quiet template, moving platen, core, running gate system, guidance system, positioning and fixing parts and the demoulding system of loosing core, and the die cavity that core and quiet template form has one section straight section that cross-sectional area is constant in the matched moulds direction; Pressure sensor and temperature sensor are arranged on the quiet template and core of mould, and displacement transducer is arranged between the quiet template and moving platen of mould; Heating rod and cooling water channel are arranged on the quiet template and moving platen of mould; The die cavity switch is made of die cavity switch valve, contiguous block and driving hydraulic cylinder, and the die cavity switch is fixed between the quiet template and solid plate of mould.
4. device according to claim 3, it is characterized in that: the die cavity switch valve of mould is that stairstepping is arranged in the step trough of offering on the quiet template of mould, the leading portion of die cavity switch valve has through hole, is provided with relief hole and communicates with step trough on the quiet template of mould.
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| CNB2007100634613A CN100560334C (en) | 2007-02-01 | 2007-02-01 | The method of on-line testing polymer pressure-specific volume-temperature relation and device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102490329A (en) * | 2011-12-13 | 2012-06-13 | 北京化工大学 | Isometric process control method utilizing PVT (pressure-volume-temperature) relation of polymers |
| CN102582032A (en) * | 2011-01-07 | 2012-07-18 | 日本航空电子工业株式会社 | Mold for injection molding, and injection molding method, injection-molded article, and injection molding machine using the mold for injection molding |
| CN102642286A (en) * | 2012-05-17 | 2012-08-22 | 北京化工大学 | Fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method |
| CN104290301A (en) * | 2013-07-18 | 2015-01-21 | 昆山德安模具设计有限公司 | Intelligent injection moulding machine |
| CN104807729A (en) * | 2015-05-04 | 2015-07-29 | 河南师范大学 | Polymer osmotic pressure measurement device and use method thereof |
| CN106079261A (en) * | 2016-06-24 | 2016-11-09 | 芜湖市万华塑料制品有限公司 | The injection mold being accurately controlled |
| CN108237669A (en) * | 2016-12-23 | 2018-07-03 | 恩格尔奥地利有限公司 | For adjusting the method for molding machine |
| CN111391260A (en) * | 2020-03-21 | 2020-07-10 | 吴学涛 | Temperature control system of injection molding machine |
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| CN102582032A (en) * | 2011-01-07 | 2012-07-18 | 日本航空电子工业株式会社 | Mold for injection molding, and injection molding method, injection-molded article, and injection molding machine using the mold for injection molding |
| TWI503216B (en) * | 2011-01-07 | 2015-10-11 | Japan Aviation Electron | Mold for injection molding, and injection molding method, injection-molded article, and injection molding machine using the mold for injection molding |
| CN102490329A (en) * | 2011-12-13 | 2012-06-13 | 北京化工大学 | Isometric process control method utilizing PVT (pressure-volume-temperature) relation of polymers |
| CN102642286A (en) * | 2012-05-17 | 2012-08-22 | 北京化工大学 | Fully-electric ultra-high speed injection molding PVT (Pressure Volume Temperature) online measurement and control method |
| CN104290301A (en) * | 2013-07-18 | 2015-01-21 | 昆山德安模具设计有限公司 | Intelligent injection moulding machine |
| CN104807729A (en) * | 2015-05-04 | 2015-07-29 | 河南师范大学 | Polymer osmotic pressure measurement device and use method thereof |
| CN104807729B (en) * | 2015-05-04 | 2017-12-29 | 河南师范大学 | A kind of polymer penetration pressure measuring device and its application method |
| CN106079261A (en) * | 2016-06-24 | 2016-11-09 | 芜湖市万华塑料制品有限公司 | The injection mold being accurately controlled |
| CN108237669A (en) * | 2016-12-23 | 2018-07-03 | 恩格尔奥地利有限公司 | For adjusting the method for molding machine |
| US11000982B2 (en) | 2016-12-23 | 2021-05-11 | Engel Austria Gmbh | Methods of setting a shaping machine |
| CN111391260A (en) * | 2020-03-21 | 2020-07-10 | 吴学涛 | Temperature control system of injection molding machine |
| CN111391260B (en) * | 2020-03-21 | 2021-04-09 | 浙江博创机械有限公司 | Temperature control system of injection molding machine |
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