CN101653977B - Metering device of supercritical fluid foaming agent - Google Patents
Metering device of supercritical fluid foaming agent Download PDFInfo
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- CN101653977B CN101653977B CN 200910306412 CN200910306412A CN101653977B CN 101653977 B CN101653977 B CN 101653977B CN 200910306412 CN200910306412 CN 200910306412 CN 200910306412 A CN200910306412 A CN 200910306412A CN 101653977 B CN101653977 B CN 101653977B
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Abstract
The invention relates to a metering device of a supercritical fluid foaming agent, in particular to a device for controlling the injection dosage of supercritical nitrogen gas/carbon dioxide foaming agent into a reciprocating four-screw plasticizing device or batch-type plasticizing device during injection. The device consists of a cut-off valve 1, a high-pressure vessel 2, a pressure reducing valve 3, a pressure sensor 4, an electrogmagnetic proportioning valve 5, a high-pressure servo valve 6, a pressure sensor 7, a temperature sensor 8, an adjustable throttling valve 9, a controlled cur-off valve 10, a pressure sensor 11, a controlled cut-off valve 12, a data processing and controlling module 13, an operating interface 14 and pressure pipelines and communication wires or cables for connecting the components. The invention has the advantages that: the metering device not only can evenly inject a foaming agent into melting resin in the reciprocating four-screw plasticizing device or batch-type plasticizing device according to the set flow, but also can realize the stability of every input dosage.
Description
Technical field
The present invention relates to a kind of metering device of supercritical fluid aerating powder, relate more specifically to when injection mo(u)lding, control and yearn for the device that injects overcritical nitrogen/carbon dioxide foaming agent dosage in compound spiro rod plasticizing device or the batch (-type) plasticizing apparatus.
Background technology
Or because the needs of structure, or because the needs of product's dimensional precision or stability, or for the purpose of the cost that saves material, use more and more the thermoplastic plastic foaming injection molded article.When foaming, such as injection or other molding modes, a kind of known method is that employing CBA and thermoplastic resin are mixing, and strictly controls technological parameter.Yet when using CBA, require on the one hand technology controlling and process very strict, exist on the other hand the blowing agent residue is arranged in the goods, mould corrosion and goods are follow-up is subjected to the restriction of environmental requirement when using, therefore the molded merchant of foaming product tends to use physical blowing agent more and more.Because nitrogen, carbon dioxide are inert gas, not can with the resin reaction of molten state; And nitrogen or carbon dioxide can be dissolved in the molten resin when supercriticality, and can in molten resin, spread with speed faster, form homogeneous mixture with molten resin, when this homogeneous mixture with larger pressure reduction or when pressure drop rate is injected in the mold cavity faster, can obtain good injection foaming goods, so supercriticality nitrogen or carbon dioxide are a kind of desirable physical blowing agents.Known, the critical point of nitrogen is that pressure is that 34 bar and temperature are-147
oC, and the critical point of carbon dioxide is that pressure 71 bar and temperature are 31.4
oC.Add man-hour adopting these supercritical fluid aerating powders to foam, the implantation dosage of blowing agent and stability thereof directly have influence on the quality stability of foaming product.Authorize a kind of system that controls gaseous state physical blowing agent flux of announcement among the disclosed Chinese patent ZL200620049021.3 " fluid flow control system of gas foaming agent " in before application and on November 28th, 2007, blowing agent is nitrogen or the carbon dioxide of nitrogen or carbon dioxide, particularly supercriticality.In actual use, find that the blowing agent flow that this system is injected has extraordinary stability and precision when continuous extrusion, but when adopting the injection machine injection mo(u)lding of reciprocating screw rod plasticizing apparatus or batch (-type) plasticizing apparatus, run into very large problem, for reciprocating screw rod plasticizing apparatus or batch (-type) plasticizing apparatus, because the spiro rod plasticizing motion is step, although can interrupt by the blowing agent stream that stop valve will lead in the melten gel after plasticizing stops, come regime flow but need to increase by-pass collar, otherwise it is stable to realize injecting pressure and/or the dosage of melten gel blowing agent within the very short time next time.
Summary of the invention
The objective of the invention is the problem according to above-mentioned the deficiencies in the prior art and existence, guarantee that when injecting blowing agent output flow is stable, thereby but and realize by identical flow and dosage blowing agent being injected into melten gel by the pressure state that when stopping to inject blowing agent, keeps adjusting joint stream valve two ends next time, and avoid impact to melten gel, a kind of device of stable injection blowing agent is provided when adopting the injection machine moulded products of reciprocating screw rod plasticizing apparatus or batch (-type) plasticizing apparatus.
The object of the invention realizes being finished by following technical scheme:
Device of the present invention is by stop valve 1, high-pressure bottle 2, pressure-reducing valve 3, pressure sensor 4, electromagnetic proportional valve 5, high pressure servo valve 6 second pressure sensors 7, temperature sensor 8, but adjusting joint stream valve 9, the first controlled stop valve 10, the 3rd pressure sensor 11, the second controlled stop valve 12, data are processed and control module 13, operation interface 14, and the pressure pipeline and communication wire or the cable composition that connect above-mentioned parts, wherein, stop valve 1, high-pressure bottle 2, high pressure servo valve 6, but adjusting joint stream valve 9, the first controlled stop valve 10, the second controlled stop valve 12 is connected in series with pressure pipeline in order, but the pipeline between high pressure servo valve 6 and adjusting joint stream valve 9 arranges the second pressure sensor 7 and temperature sensor 8, between the first controlled stop valve 10 and the second controlled stop valve 12, the 3rd pressure sensor 11 is set, stop valve 1 is connected with supercritical fluid aerating powder source 100, and the second controlled stop valve 12 directly is connected with plasticizing apparatus 300 and is installed in the installing hole 306 of machine barrel; Wherein, pressure-reducing valve 3 is connected with electromagnetic proportional valve 5, the first pressure sensor 4 is arranged on the pipeline that connects pressure-reducing valve 3 and electromagnetic proportional valve 5, and the outlet of electromagnetic proportional valve 5 is connected with the pilot gas interface of high pressure servo valve 6, and the import of pressure-reducing valve 3 is connected with compressed gas source 200.Wherein data processing and control module 13 comprise input port and delivery outlet, and its input port is connected to come receiving process parameter, force value and temperature value signal with operation interface 14, the first pressure sensor 4, the second pressure sensor 7, the 3rd pressure sensor 11, temperature sensor 8, control system for shot machine 400; Its delivery outlet is connected to come the output function instruction with electromagnetic proportional valve 5, the first controlled stop valve 10, the second controlled stop valve 12 and/or injection moulding machine control system 400; But the pipeline between adjusting joint stream valve 9 and the first controlled stop valve 10 satisfies capacity limitation that supercritical fluid aerating powder passes through at 0.01 milliliter to 0.2 milliliter.
Advantage of the present invention is, both can be implemented in the molten resin of realizing in the blowing agent injection process in reciprocating screw rod plasticizing apparatus or the clearance-type plasticizing apparatus blowing agent that injects equably by setting flow, can also realize inputting the stable of dosage at every turn.
Description of drawings
Accompanying drawing 1 is apparatus of the present invention structural representation;
Accompanying drawing 2 uses view for the present invention.
The specific embodiment
Feature of the present invention and correlated characteristic thereof are described further by embodiment below in conjunction with accompanying drawing:
Such as accompanying drawing 1,2 show, wherein label represents respectively, the 1-stop valve, the 2-high-pressure bottle, the 3-pressure-reducing valve, 4-the first pressure sensor, 5-electromagnetic proportional valve valve, the 6-high pressure servo valve, 7-the second pressure sensor, the 8-temperature sensor, but 9-adjusting joint stream valve, 10-the first controlled stop valve, 11-the 3rd pressure sensor, 12-the second controlled stop valve, the 13-data are processed and control module, the 14-operation interface, 100-supercritical fluid aerating powder source, the 200-compressed gas source, the 300-plasticizing apparatus, the 301-screw arbor assembly, the 302-machine barrel, 303-cut-off type injection nozzle, the 304-driving mechanism, 305-resin feeding port, controlled stop valve 12 installing holes of 306-, the 400-injection molding machine control device.
Show such as accompanying drawing 1,2, but apparatus of the present invention comprise by stop valve 1, high-pressure bottle 2, pressure-reducing valve 3, the first pressure sensor 4, electromagnetic proportional valve 5, high pressure servo valve 6, the second pressure sensor 7, temperature sensor 8 adjusting joints stream valve 9, the first controlled stop valve 10, the 3rd pressure sensor 11, the second controlled stop valve 12, data processing and control module 13, operation interface 14, and the pressure pipeline and communication wire or the cable composition that connect above-mentioned parts; Wherein, but stop valve 1, high-pressure bottle 2, high pressure servo valve 6, the first controlled stop valve 10 adjusting joints stream valve 9, controlled stop valve 12 are connected in series with pressure pipeline in order, but the pipeline between high pressure servo valve 6 and adjusting joint stream valve 9 arranges the second pressure sensor 7 and temperature sensor 8, and between the first controlled stop valve 10 and the second controlled stop valve 12, the 3rd pressure sensor 11 is set, stop valve 1 is connected with supercritical fluid aerating powder source 100, and the second controlled stop valve 12 directly is connected with plasticizing apparatus 300; Wherein, pressure-reducing valve 3 is connected with electromagnetic proportional valve 5, and the outlet of electromagnetic proportional valve 5 is connected with the pilot gas interface of high pressure servo valve 6, and the import of pressure-reducing valve 3 is connected with compressed gas source 200.The control of whole device and operation are processed by data and control device 13 and operation interface 14 carry out.Wherein data processing and control device 13 comprise input port and delivery outlet, and its input port is connected to come receiving process parameter, force value and temperature value signal by cable or electric wire with operation interface 14, the first pressure sensor 4, the second pressure sensor 7 and the 3rd pressure sensor 11, temperature sensor 8, injection molding machine control device 400; Its delivery outlet and electromagnetic proportional valve 5, the first controlled stop valve 10 and be connected that controlled stop valve 12 and/or injection moulding machine control device 400 are connected and the output function instruction.But the piping volume that the permission supercritical fluid aerating powder between adjusting joint stream valve 9 and the first controlled stop valve 10 passes through by the length that shortens pipeline and/or the area of section that reduces pipeline, is limited between 0.01/ milliliter to 0.2 milliliter.The described first controlled stop valve 10 and the second controlled stop valve 12 are pneumatic stopping valve or hydraulic-driven stop valve.The metering method that adopts of metering device of the present invention is included in the employing closed-loop control of supercritical fluid aerating powder injection stage and realizes stability of flow and adopt the control injection length to realize that injection supercritical fluid aerating powder dosage is fully consistent in each gas injection cycle.The control method of flow provided by the invention and dosage has taken into full account the impact on flow such as blowing agent temperature, effective throttle diameter, absolute pressure, pressure variation, in the supercritical fluid aerating powder injection process, output flow is carried out closed-loop control, make output flow fully consistent with the setting flow; And open and close by the first controlled stop valve 10 and the second controlled stop valve 12 time, determine to be injected in each injection cycle on the one hand the dosage of the supercritical fluid aerating powder of molten resin; On the other hand after the first controlled stop valve 10 and the second controlled stop valve 12 are closed simultaneously, the pressure that the 3rd pressure sensor 11 detects and feeds back will be the pressure of stop valve turn-off transient, and can remain unchanged until next injection circulation beginning the first controlled stop valve 10 and the second controlled stop valve 12 are opened simultaneously.Can realize fast like this reproduction of last injection process and dosage.Close the disconnected impact to follow-up injection technology of rear foaming agent flow resistance in order to reduce by the first controlled stop valve 10, but the piping volume that allows supercritical fluid aerating powder to pass through between adjusting joint stream valve 9 to the first controlled stop valves 10 is limited between 0.01 milliliter to 0.2 milliliter, and as far as possible little; Like this after the first controlled stop valve 10 is closed, but the pressure in this segment pipe space can be elevated to the before pressure of pipeline of adjusting joint stream valve 9, i.e. the second pressure sensor 7 detected pressure, and after the first controlled stop valve 10 and the second controlled stop valve 12 are opened simultaneously, the pressure in this section space can be promptly with the first controlled stop valve 10 after pipeline pressure comprehensive; When the described piping volume in front is limited between 0.01 milliliter to 0.2 milliliter, the ducted pressure pressure that raises in this segment pipe space can not make the first controlled stop valve 10 after the first controlled stop valve 10 and the second controlled stop valve 12 are opened after produces larger fluctuation, namely can not produce the molten resin in the plasticizing apparatus and impact.According to the situation of concrete injection-molded item, but adjusting joint stream valve 9 is adjusted to a position and locking; Set the supercritical fluid aerating powder flow value that injects at operation interface 14, and the time of the first controlled stop valve 10 and the second controlled stop valve 12 simultaneously opening and closing.When a supercritical fluid aerating powder injection cycle began, data processing and control module 13 were sent instruction and are opened simultaneously the first controlled stop valve 10 and the second controlled stop valve 12; This moment, control module 13 was according to the second pressure sensor 7 and the 3rd pressure sensor 11 actual force value that record, the temperature sensor 8 actual temperature values that record, calculate actual flow, and the flow value of actual flow value and setting compared, and arrive electromagnetic proportional valve 5 by output order and adjust the pilot gas pressure, and then the output pressure of adjustment high pressure servo valve 6, make actual flow fully consistent with the setting flow.Finish when the injection cycle, close simultaneously the first controlled stop valve 10 and the second controlled stop valve 12, obtain a dose value that injects supercritical fluid aerating powder this moment.After the first controlled stop valve 10 and the second controlled stop valve 12 are closed simultaneously, the pressure between the first controlled stop valve 10 and the second controlled stop valve 12 in the pipeline will remain unchanged substantially.
Show such as Fig. 2, use when of the present invention, the second controlled stop valve 12 is installed in the installing hole 306 on plasticizing apparatus 300 machine barrels 302; This plasticizing apparatus is according to authorizing disclosed Chinese patent ZL200820057051.8 " a kind of reciprocating screw rod plasticizing apparatus " to design and produce on February 4th, 2009, wherein the i.e. additive fluid connector described in this patent of installing hole 306; Like this delivery outlet of stop valve 12 directly with screw rod 301 and machine barrel 302 between molten resin contact; At plasticizing apparatus 300 under the driving of Power Drive Unit 304, screw rod 301 is transported to the material stream end of machine barrel 302 and the space between the shut off nozzle 303 with molten resin, meanwhile screw rod 301 retreats, the first controlled stop valve 10 and the second controlled stop valve 12 are opened simultaneously, according to mass flow or the volume flow set on the operation interface 14, for example per minute or the per hour volume flow of injection, accurately in molten resin, inject supercritical fluid aerating powder, realize molten resin and the supercritical fluid aerating powder proportioning of expectation; By setting the simultaneously time point of shut-in time before plasticizing stops or stopping of the first controlled stop valve 10 and the second controlled stop valve 12 on the operation interface 14, stable flow value and injection length length realize the implantation dosage control in each injection cycle when injecting by control like this; And the molten resin that has mixed supercritical fluid aerating powder is flowed down mixing elements on the screw rod 301 of trip and mixes and form the homogeneous mixture system by material; After opening the cut-off type injection nozzle, be injected among the mold cavity;
After the first control stop valve 10 and the second controlled stop valve 12 closed simultaneously until before next cycle opens simultaneously, big ups and downs process when the molten resin pressure in the plasticizing apparatus 300 will experience injection, and return to pressure state when beginning a gas injection cycle, and at this section in the period, because after the first controlled stop valve 10 and the second controlled stop valve 12 cut-offs, pressure before ducted gas pressure maintains cut-off substantially between the first controlled stop valve 10 and the second controlled stop valve 12, pressure sensor 11 feeds back to data processing and control module 13 with force value wherein; And but module 13 is controlled pressure between high pressure servo valve 6 and the adjusting joint stream valve 9 by flow-rate ratio, and when calculated flow rate was consistent with the setting flow, high pressure servo valve 6 in fact was in cut-off state or near cut-off state; After next fusion cycle begins or begins each constantly, the first controlled stop valve 10 and the second controlled stop valve 12 are opened under the instruction that data are processed and control module 13 is sent simultaneously, the supercritical fluid aerating powder that installs pipes just can be immediately according to the traffic flow of setting and be injected in the molten resin, thereby realize the stable of flow and each injection cycle implantation dosage.
In order to make technical staff of the same trade understand the present invention, further be described as follows by specific embodiment:
As blowing agent, adopt polypropylene (PP) to produce a kind of automobile safety handle with overcritical nitrogen, a mould four chambeies, single-piece weight 85 grams.With the injection machine production of 250 tons of clamp forces, plasticizing apparatus is according to authorizing disclosed Chinese patent ZL200820057051.8 " a kind of reciprocating screw rod plasticizing apparatus " to design and produce on February 4th, 2009, and screw diameter is 54 millimeters, draw ratio L/D=23.Use diaphragm type compressor proper Operation of Industrial bottled nitrogen to be boosted to supercriticality (260-350 bar, about 30 of an optimization
oC) as the blowing agent source.In the metering device of supercritical fluid foaming agent in the present embodiment, but directly be connected with a pneumatic stopping valve at adjusting joint stream valve outlet port, piping volume between the two is at 0.01 milliliter.Adopting metering device of supercritical fluid foaming agent of the present invention that overcritical nitrogen gas foaming agent source and plasticizing apparatus are installed said method is connected.But first with adjusting joint stream valve regulation to a position, the input pressure that makes choke valve 240 bar, output pressure during at 160 bar flow be 20 liter/mins of clocks, locking choke valve, and the flow of setting injection is at 18 liter/mins of clocks; Set the plasticizing back pressure of injection machine at 10 bar oil pressure, set the plasticizing rotating speed and make plasticizing apparatus finish plasticizing 340 gram PP material at 15 seconds; Opened in 1 second after beginning to plastify signal obtaining injection machine simultaneously but set the first controlled stop valve 10 at adjusting joint stream valve two ends and the second controlled stop valve 12, set the first controlled stop valve 10 and the second controlled stop valve 12 and closed simultaneously in 11 seconds after beginning to plastify signal obtaining injection machine.After setting like this, open the stop valve 1 of input port, open diaphragm type compressor and make the pressure of high-pressure bottle 2 be elevated to a force value between the 260 bar-350 bar scope; And the import of pressure-reducing valve 3 in the pilot gas gas circuit of device is connected with the compressed air source of 6 bar.Whole system is ready like this, begins to produce foregoing automobile safety handle.Produce continuously 50 moulds, although the pressure of molten resin has certain fluctuation in plasticizing process, and the moment after two Controlled valves are opened simultaneously, the pressure that sensor detects has one less than the minor fluctuations of 1 bar pressure, keep stable but observe each flow curve that injects circulation, implantation dosage is in 3 ± 0.009 liters scope; Detect the weight of goods, the weight of goods further detects the cross-section structure of goods in each die cavity in the scope of 84.5-85 grams, finds that the foaming situation is consistent.This illustrates that blowing agent volume control device of the present invention realized automated closed-loop control flow, can realize fully-automatic production.
Again for example: as blowing agent, the product of employed injection machine and production is identical with embodiment 1 with supercritical carbon dioxide.And metering device of supercritical fluid foaming agent different from above-described embodiment be, but the piping volume between adjusting joint stream valve and the controlled stop valve is 0.2 milliliter, choke valve when input pressure 240 bar, output pressure during at 160 bar flow be the flow of 40 liter/mins of clocks, the blowing agent injection length remained 11 seconds in each cycle.Produce continuously 50 moulds, although the pressure of molten resin has certain fluctuation in plasticizing process, and the moment after two Controlled valves are opened simultaneously, the pressure that sensor detects has one less than the minor fluctuations of 5 bar pressures, keep stable but observe each flow curve that injects circulation, implantation dosage is in 6 ± 0.01 liters scope; Detect the weight of goods, the weight of goods further detects the cross-section structure of goods in each die cavity in the scope of 84.5-85 grams, finds that the foaming situation is consistent.This illustrates that blowing agent volume control device of the present invention realized automated closed-loop control flow, can realize fully-automatic production.
Although below with reference to accompanying drawing design and embodiment according to the object of the invention have been done to elaborate; but those of ordinary skills can recognize; under the precondition that does not break away from the claim limited range; still can make various improvement and conversion to the present invention, and this improvement and conversion still should belong to protection scope of the present invention.
Claims (2)
1. metering device of supercritical fluid foaming agent, it is characterized in that, by stop valve (1), high-pressure bottle (2), pressure-reducing valve (3), the first pressure sensor (4), electromagnetic proportional valve (5), high pressure servo valve (6), the second pressure sensor (7), temperature sensor (8), but adjusting joint stream valve (9), the first controlled stop valve (10), the 3rd pressure sensor (11), the second controlled stop valve (12), data are processed and control module (13), operation interface (14), and the pressure pipeline and communication wire or the cable composition that connect above-mentioned parts, wherein, stop valve (1), high-pressure bottle (2), high pressure servo valve (6), but adjusting joint stream valve (9), the first controlled stop valve (10), the second controlled stop valve (12) is connected in series with pressure pipeline in order, in high pressure servo valve (6) but and the pipeline between the adjusting joint stream valve (9) the second pressure sensor (7) and temperature sensor (8) are set, between the first controlled stop valve (10) and the second controlled stop valve (12), the 3rd pressure sensor (11) is set, stop valve (1) is connected with supercritical fluid aerating powder source (100), and the second controlled stop valve (12) directly is connected and is installed in the installing hole (306) of machine barrel with plasticizing apparatus (300); Wherein, pressure-reducing valve (3) is connected with electromagnetic proportional valve (5), the first pressure sensor (4) is arranged on the pipeline that connects pressure-reducing valve (3) and electromagnetic proportional valve (5), the outlet of electromagnetic proportional valve (5) is connected with the pilot gas interface of high pressure servo valve (6), and the import of pressure-reducing valve (3) is connected with compressed gas source (200); Wherein data processing and control module (13) comprise input port and delivery outlet, and its input port is connected to come receiving process parameter, force value and temperature value signal with operation interface (14), the first pressure sensor (4), the second pressure sensor (7), the 3rd pressure sensor (11), temperature sensor (8), control system for shot machine (400); Its delivery outlet is connected to come the output function instruction with electromagnetic proportional valve (5), the first controlled stop valve (10), the second controlled stop valve (12) and/or injection moulding machine control system (400).
2. according to claim 1 metering device of supercritical fluid foaming agent is characterized in that, but the pipeline between adjusting joint stream valve (9) and the first controlled stop valve (10) satisfies capacity limitation that supercritical fluid aerating powder passes through at 0.01 milliliter to 0.2 milliliter.
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| CN103213237B (en) * | 2013-04-08 | 2015-04-22 | 天台诚一新材料有限公司 | Injecting and metering device for supercritical carbon dioxide in extrusion foaming |
| CN113608557A (en) * | 2021-08-04 | 2021-11-05 | 长虹美菱股份有限公司 | Sectional type control system and method for foaming injection flow |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1752236A1 (en) * | 2005-07-26 | 2007-02-14 | GM Global Technology Operations, Inc. | Online control of blowing agent content of polymer beads for making lost foam patterns |
| CN101200108A (en) * | 2006-12-15 | 2008-06-18 | 北京中拓机械有限责任公司 | Fluid flow control system of gas foaming agent |
| CN101480831A (en) * | 2009-01-19 | 2009-07-15 | 北京中拓机械有限责任公司 | Supercritical fluid aerating powder conveying device and control method |
| CN201471668U (en) * | 2009-09-02 | 2010-05-19 | 北京中拓机械有限责任公司 | Supercritical fluid foaming agent dosage control device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1752236A1 (en) * | 2005-07-26 | 2007-02-14 | GM Global Technology Operations, Inc. | Online control of blowing agent content of polymer beads for making lost foam patterns |
| CN101200108A (en) * | 2006-12-15 | 2008-06-18 | 北京中拓机械有限责任公司 | Fluid flow control system of gas foaming agent |
| CN101480831A (en) * | 2009-01-19 | 2009-07-15 | 北京中拓机械有限责任公司 | Supercritical fluid aerating powder conveying device and control method |
| CN201471668U (en) * | 2009-09-02 | 2010-05-19 | 北京中拓机械有限责任公司 | Supercritical fluid foaming agent dosage control device |
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Owner name: BEIJING CHN-TOP MACHINERY GROUP CO., LTD. Free format text: FORMER NAME: BEIJING CHN-TOP MACHINERY CO., LTD. |
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Address after: 102208 Beijing, Huilongguan, Beijing, China Billiton Machinery Co., Ltd. Patentee after: Co., Ltd of mechanical group is opened up in Beijing Address before: 102208 Beijing, Huilongguan, Beijing, China Billiton Machinery Co., Ltd. Patentee before: Beijing Chn-Top Machinery Co., Ltd. |