CN109351804B - Protection method for curling machine - Google Patents
Protection method for curling machine Download PDFInfo
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- CN109351804B CN109351804B CN201811176806.0A CN201811176806A CN109351804B CN 109351804 B CN109351804 B CN 109351804B CN 201811176806 A CN201811176806 A CN 201811176806A CN 109351804 B CN109351804 B CN 109351804B
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- machine
- key switch
- key
- safety door
- curling
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010008 shearing Methods 0.000 claims description 28
- 238000005096 rolling process Methods 0.000 claims description 17
- 238000009957 hemming Methods 0.000 claims description 16
- 239000002699 waste material Substances 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
The invention belongs to the technical field of steel production safety, and particularly relates to a protection method of a curling machine. The method comprises the following steps: after the controller receives a stop signal fed back by the first curling machine, the controller sends a first opening signal to control the first safety door to open; after the controller receives a stop signal fed back by the second curling machine, the controller sends a second opening signal to control the second safety door to open; after the controller receives the stop signals fed back by the first curling machine and the second curling machine, the controller sends a third opening signal to control the third safety door to open; and after the controller receives the stop signals fed back by the first curling machine and the second curling machine, the controller sends a fourth opening signal to control the fourth safety door to open. The invention can improve the safety of operators in operation.
Description
Technical Field
The invention belongs to the technical field of steel production safety, and particularly relates to a protection method of a curling machine.
Background
The shearing unit is mainly used for producing the non-oriented silicon steel. The main function of the shearing unit is to realize the edge cutting and the coil splitting of the finished coil. The shearing machine set is equipped with a curling machine and is used for coiling the waste edge generated in the production process of the shearing machine set.
Among the prior art, in the finishing operation district of silicon steel, have two symmetrical arrangement's shearing unit in the same span of factory building, install in the below ground pit in the middle of two shearing units with shearing unit complex beader, still be provided with the waste hopper in this pit, the waste hopper sets up between two beaders, the waste material that the beader produced is collected through the waste hopper, after the waste material in the waste hopper is piled up fully, need change the waste hopper, in order to clear away the waste material in the waste hopper, need the manual work to enter into the pit promptly and carry out work.
In implementing the present invention, the applicant has found that at least the following problems exist in the prior art:
due to the requirements of the work task in the production process of the shearing unit and the limit of the easy overlap and sleeve lifting characteristics of the curling unit in the coiling process, the problems that people are injured by misoperation of the curling unit, people are injured by the overlap of the slitter edges or people are injured by the overlap lifting of the slitter edges and the like are easily caused, and therefore, how to meet the requirements of the work task of the shearing unit and ensure the safety of the work of entering the pit by workers is a technical problem which needs to be solved urgently in the prior art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a protection method for a curling machine, which can meet the requirements of the work task of a shearing unit and ensure the safety of the manual work entering a pit for work.
The invention realizes the purpose through the following technical scheme:
the protection method of the edge rolling machine is characterized in that the two edge rolling machines are arranged between two shearing machine sets which are symmetrically arranged, the two shearing machine sets are respectively a first shearing machine set and a second shearing machine set, protective guards are arranged on the periphery of the edge rolling machine, a first safety door is arranged at one end, close to the first shearing machine set, of the front side of each protective guard, a second safety door is arranged at one end, close to the second shearing machine set, of the front side of each protective guard, a third safety door is arranged in the middle of the front side of each protective guard, a fourth safety door is arranged in the middle of the rear side of each protective guard, the two edge rolling machines are respectively a first edge rolling machine and a second edge rolling machine, and a waste hopper is arranged between the first edge rolling machine and the second edge rolling machine; the protection method comprises the following steps:
when the first safety door needs to work, a controller sends a first stop signal to a first curling machine, the first curling machine feeds back to the controller after the first curling machine stops, and the controller sends a first opening signal to control the first safety door to open after receiving the stop signal fed back by the first curling machine;
when the second safety door needs to work, the controller sends a second stop signal to the second curling machine, the second curling machine feeds back to the controller after the second curling machine stops, and the controller sends a second opening signal to control the second safety door to open after receiving the stop signal fed back by the second curling machine;
when a third safety door needs to work, a controller sends a third stop signal to the first curling machine and the second curling machine, after the first curling machine and the second curling machine stop, the first curling machine and the second curling machine feed back to the controller, and after the controller receives the stop signals fed back by the first curling machine and the second curling machine, the controller sends a third opening signal to control the third safety door to open;
when the fourth safety door needs to work, the controller sends a fourth stop signal to the first curling machine and the second curling machine, after the first curling machine and the second curling machine stop, the first curling machine and the second curling machine feed back to the controller, and after the controller receives the stop signal fed back by the first curling machine and the second curling machine, the controller sends a fourth opening signal to control the fourth safety door to open.
Further, the controller sends out a first opening signal, and the control of opening the first safety door specifically includes:
the first emergency exit lateral part is provided with first operation panel, be provided with first key switch on the first operation panel, first key is set up with unblocking in the first key switch, the controller sends first opening signal extremely first key switch, first key switch unblock, first key follow take out in the first key switch, will through first key first emergency exit is opened.
Further, the controller sends a second opening signal to control the second safety door to open specifically comprises:
the side part of the second safety door is provided with a second operating platform, a second key switch is arranged on the second operating platform, a second key can be arranged in the second key switch in an unlocking mode, the controller sends a second opening signal to the second key switch, the second key switch is unlocked, the second key is taken out of the second key switch, and the second safety door is opened through the second key.
Further, the controller sends a third opening signal to control the third safety door to open specifically includes:
the controller sends a third opening signal to the first key switch and the second key switch, the first key switch and the second key switch are unlocked, the first key and the second key are taken out of the first key switch and the second key switch respectively, and the third safety door is opened through the first key and the second key.
Further, the controller sends a fourth opening signal to control the fourth safety door to open specifically including:
still be provided with the third key switch on the first operation panel, the third key sets up with unblocking in the third key switch, still be provided with the fourth key switch on the second operation panel, the fourth key sets up with unblocking in the fourth key switch, the controller sends the fourth turn-on signal extremely the third key switch with the fourth key switch, the third key switch with fourth key switch unblock, the third key with the fourth key is followed respectively the third key switch with take out in the fourth key switch, through the third key with the fourth key will fourth emergency exit is opened
The invention has the beneficial effects that:
according to the protection method of the curling machine, the first safety door is close to the first curling machine and far from the second curling machine, when the first safety door needs to work, the controller sends out the first opening signal to control the first safety door to open after the first curling machine stops, and therefore safety of operators entering the first safety door during working can be improved.
Similarly, the second safety door is close to the second curling machine and far from the first curling machine, so that when the second safety door needs to work through the second safety door, the controller sends a second opening signal to control the second safety door to open after the second curling machine stops, and the safety of an operator entering the second safety door during working can be improved.
Because the third safety door is positioned between the first curling machine and the second curling machine, when the third safety door is required to work, the controller sends a third opening signal to control the third safety door to open after the first curling machine and the second curling machine stop, so that the safety of operators entering the third safety door during working can be improved.
Similarly, because the fourth safety door is positioned between the first curling machine and the second curling machine, when the fourth safety door is required to work, the controller sends a fourth opening signal to control the fourth safety door to open after the first curling machine and the second curling machine are stopped, and the safety of operators entering the fourth safety door during working can be improved.
In summary, according to the protection method for the hemming machine provided by the invention, because the safety doors are opened under the working environment that the corresponding hemming machine is stopped, the safety of the operator during operation can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic configuration diagram of an arrangement environment of a hemming machine in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First, the arrangement environment of the hemming machine in the embodiment of the present invention is described.
Fig. 1 is a schematic configuration diagram of an arrangement environment of a hemming machine in an embodiment of the present invention. Referring to fig. 1, the two curling machines of the embodiment of the present invention are respectively a first curling machine 1 and a second curling machine 2, the two curling machines are disposed between two shearing units which are symmetrically disposed, the two shearing units are respectively a first shearing unit 3 and a second shearing unit 4, a guard rail 5 is disposed around the curling machine, a first safety door 6 is disposed at one end of the front side of the guard rail 5 close to the first shearing unit 3, a second safety door 7 is disposed at one end of the front side of the guard rail 5 close to the second shearing unit 2, a third safety door 8 is disposed in the middle of the front side of the guard rail 5, a fourth safety door 9 is disposed in the middle of the rear side of the guard rail 5, and a waste bin 10 is disposed between the first curling machine 1 and the second curling machine 2.
With reference to fig. 1, in the embodiment of the present invention, a first operation table 11 is provided on a side portion of the first security door 6, a first key switch 12 and a third key switch 13 are provided on the first operation table 11, the first key is provided in the first key switch 12 so as to be unlocked, and the third key is provided in the third key switch 13 so as to be unlocked. A second operation table 14 is provided on the side of the second safety door 7, a second key switch 15 and a fourth key switch 16 are provided on the second operation table 14, the second key is provided in the second key switch 15 so as to be unlocked, and the fourth key switch 16 is provided in the fourth key switch so as to be unlocked.
Regarding the arrangement environment of the hemming machine, the protection method of the hemming machine provided by the embodiment of the invention comprises the following steps:
1. when the first safety door 6 needs to work, the controller sends a first stop signal to the first curling machine 1, after the first curling machine 1 stops, the first curling machine 1 feeds back to the controller, and after the controller receives the stop signal fed back by the first curling machine 1, the controller sends a first opening signal to control the first safety door 6 to open.
The first safety door 6 is usually opened when the thickness of the steel sheet wound by the first hemming machine 1 meets the requirement, and the wound steel sheet needs to be taken out, and at this time, the first safety door 6 needs to be opened. Because the first safety door 6 is close to the first curling machine 1 and far from the second curling machine 2, when the first safety door 6 needs to work, the first curling machine 1 needs to be stopped, and the controller sends a first opening signal to control the first safety door 6 to be opened after the first curling machine is stopped, so that the safety of an operator entering the first safety door during working can be improved.
In the embodiment of the present invention, the sending a first opening signal by the controller to control the opening 6 of the first security door specifically includes:
the controller sends a first opening signal to the first key switch 12, the first key switch 12 is unlocked, the first key is taken out of the first key switch, and the first safety door 6 is opened through the first key.
2. When the second safety door 7 needs to work, the controller sends a second stop signal to the second curling machine 2, after the second curling machine 2 stops, the second curling machine 2 feeds back to the controller, and after the controller receives the stop signal fed back by the second curling machine 2, the controller sends a second opening signal to control the second safety door 7 to open.
The secondary safety door 7 is opened at a timing that the rolled steel sheet is taken out when the thickness of the steel sheet rolled by the secondary rolling machine 2 is generally in conformity with a requirement, and at this time, the secondary safety door 7 is opened. Because the second safety door 7 is close to the second curling machine 2 and far from the first curling machine 1, when the second safety door 7 needs to work, the second curling machine 2 needs to be stopped, and the controller sends a second opening signal to control the second safety door 6 to be opened after the second curling machine is stopped, so that the safety of operators entering the second safety door during working can be improved.
In the embodiment of the present invention, the sending of the second opening signal by the controller to control the opening of the second security door specifically includes:
the controller sends a second opening signal to the second key switch 15, the second key switch 15 is unlocked, the second key is taken out of the second key switch 15, and the second safety door is opened through the second key.
3. When the third safety door 8 needs to work, the controller sends a third stop signal to the first curling machine 1 and the second curling machine 2, after the first curling machine 1 and the second curling machine 2 stop, the first curling machine 1 and the second curling machine 2 feed back to the controller, and after the controller receives the stop signal fed back by the first curling machine 1 and the second curling machine 2, the controller sends a third opening signal to control the third safety door 8 to open.
In the embodiment of the present invention, the third safety door 8 is opened when the waste bin 10 is full of waste and the waste bin 10 needs to be replaced, and at this time, the third safety door 8 needs to be opened. Because the third safety door 8 is positioned between the first curling machine 1 and the second curling machine 2, when the third safety door 8 is needed to work, the controller sends a third opening signal to control the third safety door 8 to open after the first curling machine 1 and the second curling machine 2 are both stopped, so that the safety of operators entering the third safety door during working can be improved.
In the embodiment of the present invention, the sending, by the controller, the third opening signal to control the third security door 8 to open specifically includes:
the controller sends a third opening signal to the first key switch 12 and the second key switch 15, the first key switch 12 and the second key switch 15 are unlocked, the first key and the second key are taken out of the first key switch 12 and the second key switch 15 respectively, and the third safety door is opened through the first key and the second key.
In the embodiment of the invention, as the two keys are required to be respectively unlocked from the two key switches, and the two key switches are unlocked only on the premise that the corresponding curling machine is stopped, the danger caused by opening the third safety door 8 when the curling machine is not stopped can be prevented, and the safety is improved.
4. When the fourth safety door 9 needs to work, the controller sends a fourth stop signal to the first curling machine 1 and the second curling machine 2, after the first curling machine 1 and the second curling machine 2 stop, the first curling machine 1 and the second curling machine 2 feed back to the controller, and after the controller receives the stop signal fed back by the first curling machine 1 and the second curling machine 2, the controller sends a fourth opening signal to control the fourth safety door 10 to open.
In the embodiment of the invention, the fourth safety door 9 is opened when the first hemming machine 1 and/or the second hemming machine 2 has a fault and needs to be maintained by a worker, so that the fourth safety door 9 is opened. Because the fourth safety door 9 is positioned between the first curling machine 1 and the second curling machine 2, when the fourth safety door 9 is needed to work, the controller sends a fourth opening signal to control the fourth safety door 9 to open after the first curling machine 1 and the second curling machine 2 are stopped, so that the safety of an operator entering the fourth safety door during working can be improved.
In the embodiment of the present invention, the sending of the fourth opening signal by the controller to control the opening of the fourth safety door 9 specifically includes:
the controller sends a fourth opening signal to the third key switch 13 and the fourth key switch 16, the third key switch 13 and the fourth key switch 16 are unlocked, the third key and the fourth key are taken out of the third key switch 13 and the fourth key switch 16 respectively, and the fourth safety door 9 is opened through the third key and the fourth key.
In the embodiment of the invention, as the two keys are required to be respectively unlocked from the two key switches, and the two key switches are unlocked only on the premise that the corresponding curling machine is stopped, the danger caused by opening the third safety door 8 when the curling machine is not stopped can be prevented, and the safety is improved.
It should be noted that, in the embodiment of the present invention, the third key switch 13 and the fourth key switch 16 may also be disposed at other positions, for example, on operation platforms at two ends of the rear side of the guard rail 5, which is not limited in this respect in the embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the third key switch 13 and the fourth key switch 16, and the first key switch 12 and the second key switch 15 may be unlocked simultaneously, or may be unlocked in groups, that is, when the third key switch 13 and the fourth key switch 16 are unlocked, the first key switch 12 and the second key switch 15 are not unlocked, and when the first key switch 12 and the second key switch 15 are unlocked, the third key switch 13 and the fourth key switch 16 are unlocked, all of the unlocking manners may be to unlock the corresponding security door, and therefore, the embodiment of the present invention is not limited to this.
When the operator finishes the required work, the keys are respectively taken down and inserted back into the key switches at the corresponding positions, the keys are locked again, and the corresponding curling machines recover the normal functions.
In summary, according to the protection method for the hemming machine provided by the invention, because the safety doors are opened under the working environment that the corresponding hemming machine is stopped, the safety of the operator during operation can be improved.
The above-mentioned embodiments are only for convenience of description of the invention, and are not intended to limit the invention in any way, and those skilled in the art will recognize that the invention can be practiced without departing from the spirit and scope of the invention.
Claims (1)
1. The protection method of the edge rolling machine is characterized in that the two edge rolling machines are arranged between two shearing machine sets which are symmetrically arranged, the two shearing machine sets are respectively a first shearing machine set and a second shearing machine set, protective guards are arranged on the periphery of the edge rolling machine, a first safety door is arranged at one end, close to the first shearing machine set, of the front side of each protective guard, a second safety door is arranged at one end, close to the second shearing machine set, of the front side of each protective guard, a third safety door is arranged in the middle of the front side of each protective guard, a fourth safety door is arranged in the middle of the rear side of each protective guard, the two edge rolling machines are respectively a first edge rolling machine and a second edge rolling machine, and a waste hopper is arranged between the first edge rolling machine and the second edge rolling machine; the protection method comprises the following steps:
when the first safety door needs to work, the controller sends a first stop signal to the first hemming machine, after the first hemming machine stops, the first hemming machine feeds back to the controller, after the controller receives the stop signal fed back by the first hemming machine, the controller sends a first opening signal to control the first safety door to open, and the controller sends a first opening signal to control the first safety door to open specifically comprises:
a first operating platform is arranged on the side of the first safety door, a first key switch is arranged on the first operating platform, a first key can be arranged in the first key switch in an unlocking mode, the controller sends a first unlocking signal to the first key switch, the first key switch is unlocked, the first key is taken out of the first key switch, and the first safety door is unlocked through the first key;
when needs are through second emergency exit during operation, the controller sends second shut down signal extremely the second beading machine, after the second beading machine stops, the second beading machine to the controller feedback, the controller is received behind the shut down signal of second beading machine feedback, the controller sends the second and opens the signal, controls the second emergency exit is opened and specifically includes:
a second operation table is arranged on the side of the second safety door, a second key switch is arranged on the second operation table, a second key can be arranged in the second key switch in an unlocking mode, the controller sends a second unlocking signal to the second key switch, the second key switch is unlocked, the second key is taken out of the second key switch, and the second safety door is unlocked through the second key;
when a third safety door needs to work, the controller sends a third stop signal to the first curling machine and the second curling machine, after the first curling machine and the second curling machine stop, the first curling machine and the second curling machine feed back to the controller, after the controller receives the stop signal fed back by the first curling machine and the second curling machine, the controller sends a third opening signal to control the third safety door to open, and the controller sends a third opening signal to control the third safety door to open, wherein the third opening signal specifically comprises:
the controller sends a third opening signal to the first key switch and the second key switch, the first key switch and the second key switch are unlocked, the first key and the second key are taken out of the first key switch and the second key switch respectively, and the third safety door is opened through the first key and the second key;
when the fourth safety door needs to work, the controller sends a fourth stop signal to the first curling machine and the second curling machine, after the first curling machine and the second curling machine stop, the first curling machine and the second curling machine feed back to the controller, after the controller receives the stop signal fed back by the first curling machine and the second curling machine, the controller sends a fourth opening signal to control the fourth safety door to be opened, and the fourth safety door is specifically opened to include:
still be provided with the third key switch on the first operation panel, the third key sets up with unblocking in the third key switch, still be provided with the fourth key switch on the second operation panel, the fourth key sets up with unblocking in the fourth key switch, the controller sends the fourth turn-on signal extremely the third key switch with the fourth key switch, the third key switch with the fourth key switch unblock, the third key with the fourth key is followed respectively the third key switch with take out in the fourth key switch, through the third key with the fourth key will the fourth emergency exit is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176806.0A CN109351804B (en) | 2018-10-10 | 2018-10-10 | Protection method for curling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176806.0A CN109351804B (en) | 2018-10-10 | 2018-10-10 | Protection method for curling machine |
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| Publication Number | Publication Date |
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| CN109351804A CN109351804A (en) | 2019-02-19 |
| CN109351804B true CN109351804B (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811176806.0A Active CN109351804B (en) | 2018-10-10 | 2018-10-10 | Protection method for curling machine |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2885492Y (en) * | 2006-03-21 | 2007-04-04 | 山东齐鲁电机制造有限公司 | Safety protective device for shear plate apparatus |
| US8505423B2 (en) * | 2009-01-08 | 2013-08-13 | Esys Corporation | Weight material dispensing and cutting system |
| CN102601191A (en) * | 2012-03-19 | 2012-07-25 | 中国重型机械研究院有限公司 | Safety door control system of curling machine of rewinding unit |
| CN202877644U (en) * | 2012-09-20 | 2013-04-17 | 赵天喜 | Safety protective device of sawing machine |
| CN104438950B (en) * | 2014-12-25 | 2016-05-04 | 济南二机床集团有限公司 | The safety device of automatic stamping line and method |
| CN106112680B (en) * | 2016-07-25 | 2019-01-18 | 杭州蕙勒智能科技有限公司 | A kind of numerically-controlled machine tool automatic production line with safety door system |
| CN205968444U (en) * | 2016-08-30 | 2017-02-22 | 浙江陀曼智造科技有限公司 | Protective safety door |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 064400 No. 025 Zhao'an Street, Qian'an Economic Development Zone, Tangshan City, Hebei Province Patentee after: Shougang Zhixin Electromagnetic Materials (Qian'an) Co.,Ltd. Country or region after: China Address before: 064400 No. 025, Zhao an street, western industrial area, Qian'an, Tangshan City, Hebei Patentee before: SHOUGANG ZHIXIN QIAN'AN ELECTROMAGNETIC MATERIALS Co.,Ltd. Country or region before: China |