CN115818318A - Thermoplastic polyurethane elastomer cast film rewinding machine - Google Patents
Thermoplastic polyurethane elastomer cast film rewinding machine Download PDFInfo
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- CN115818318A CN115818318A CN202211332419.8A CN202211332419A CN115818318A CN 115818318 A CN115818318 A CN 115818318A CN 202211332419 A CN202211332419 A CN 202211332419A CN 115818318 A CN115818318 A CN 115818318A
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Abstract
The invention relates to the technical field of cast film production, and discloses a thermoplastic polyurethane elastomer cast film rewinding machine which comprises a contact wheel, wherein rotating shafts are arranged on two sides of the contact wheel, a cavity is jointly formed in the contact wheel and the rotating shafts, a rotating groove is formed in the contact wheel, a fixing rod is fixedly mounted in the cavity, a shifting part is mounted on the fixing rod, a telescopic cavity is formed in the contact wheel, a telescopic rod is mounted in the telescopic cavity, a deflection cavity is formed in the contact wheel, a push-pull rod is mounted in the push-pull cavity, tension parts are mounted on the left side and the right side of the contact wheel, a rod body of the push-pull rod is fixedly connected with the tension parts, and a connecting rod is mounted in a cavity of the deflection cavity. According to the invention, the small-area film is axially pulled through the arrangement of the tension piece and the connecting rod, so that the probability of generating folds of the small-area film is reduced, and the winding quality is indirectly improved.
Description
Technical Field
The invention relates to the technical field of cast film production, in particular to a thermoplastic polyurethane elastomer cast film rewinding machine.
Background
The thermoplastic polyurethane elastomer cast film is a flat extruded film obtained by processing and forming polyurethane elastomer through plastic processing and forming technologies such as extrusion, injection, calendering, blow molding, salivation and the like, and after the production is finished, a rewinding machine is usually needed to divide a large-area film into a plurality of small-area films which are coiled to be convenient for subsequent transportation.
The existing rewinding machine comprises a feeding wheel, a cutting blade, a contact wheel, a tensioning wheel and a winding wheel, wherein during operation, a large-area film on the feeding wheel firstly passes through the blade, so that the blade cuts the large-area film into a small-area film, then the small-area film sequentially passes through the contact wheel and the tensioning wheel and finally is wound on the surface of the winding wheel.
Disclosure of Invention
Aiming at the defects of the existing rewinding machine in the use process in the background technology, the invention provides the thermoplastic polyurethane elastomer cast film rewinding machine which has the advantages of reducing the probability of generating wrinkles on a small-area film and improving the winding quality, and solves the technical problems in the background technology.
The invention provides the following technical scheme: a thermoplastic polyurethane elastomer cast film rewinding machine comprises a contact wheel, rotating shafts are fixedly mounted at two side positions of the contact wheel, the contact wheel and the rotating shafts jointly penetrate through the contact wheel to form a cavity, a rotating groove is formed in the middle position of the interior of the contact wheel, a fixed rod which moves relative to the rotating shafts is fixedly mounted in the cavity, a poking piece in the rotating groove is fixedly mounted on the fixed rod, telescopic cavities are circumferentially and equidistantly formed in the positions, located on the outer side of the rotating groove, of the interior of the contact wheel, inner end heads of the telescopic rods penetrate through telescopic rods of the contact wheel, the inner end heads of the telescopic rods are in contact with the circumferential side faces of the poking piece, deflection cavities are circumferentially and equidistantly formed in the positions, located on the left side and the right side of the telescopic cavities, of the interior of the contact wheel, located on one side, far away from the telescopic cavities, of the deflection cavities, and used for communicating the telescopic cavities with the telescopic cavities, push-pull rods are slidably mounted in the push-pull cavities, tension pieces are circumferentially mounted on the left side and right side of the contact wheel, a rod body of the equidistant push-pull rod is fixedly connected with the side faces of the contact wheel, a connecting rod, and a fixed end of the push-pull rod is hinged with a fixed end of the push-pull rod.
Preferably, the diameter of the rotary groove is larger than that of the cavity, a lug structure which is inclined is fixedly mounted on the circumferential side face of the stirring piece, the rear side of the lug structure and the circumferential side face of the stirring piece form smooth transition arrangement, and the inclined angle of the lug structure corresponds to the angle of the contact wheel contacting the film.
Preferably, the telescopic rod is in sealed movable connection with a position penetrating through the contact wheel, and the piston end of the push-pull rod is in sealed movable connection with the wall body of the push-pull cavity.
Preferably, when the lug structure drives the telescopic link limit and stretches into flexible chamber, the connecting rod drives the push-and-pull rod and removes to the direction of keeping away from flexible chamber, shared space is for moving occupation space outward when the telescopic link limit stretches into flexible chamber, when flexible chamber is kept away from to the push-and-pull rod, lie in the push-and-pull rod in the push-and-pull chamber and be axial occupation space towards the cavity of flexible chamber one side position, the volume that moves occupation space outward is less than axial occupation space's volume.
Preferably, an elastic part is fixedly mounted between the inner wall of the push-pull cavity facing the telescopic cavity and the piston end of the push-pull rod, and the elasticity of the elastic part is greater than the gravity of the telescopic rod.
Preferably, the push-pull rod and the tension member are provided with through holes, one side of each through hole is communicated with a cavity in the push-pull cavity, the cavity is located at one side of the push-pull rod facing the telescopic cavity, and the other side of each through hole is arranged on the circumferential side face of the tension member.
Preferably, the circumferential side of the tension member is provided with an arc-shaped structure, and the diameter of the arc-shaped structure is larger than that of the contact wheel.
The invention has the following beneficial effects:
1. according to the invention, through the arrangement of the tension member and the connecting rod, when the small-area film is in contact with the circumferential side surfaces of the contact wheel and the tension member, the tension member is driven by the connecting rod to extend out along the axial direction of the contact wheel, so that the small-area film is axially pulled, the probability of generating wrinkles on the small-area film is further reduced, and the winding quality is indirectly improved.
2. According to the invention, through the arrangement of the tension member and the through hole and the arc-shaped structure arranged on the circumferential side of the tension member, the contact area between the film and the tension member is increased, so that the film is more easily pulled by the tension member, the probability of wrinkles generated on the small-area film is reduced, meanwhile, in the stretching process of the tension member, negative pressure is generated in the push-pull cavity, and the negative pressure passes through the through hole to exert attraction on the film attached to the surface of the tension member, so that the film can be effectively pulled by the tension member.
3. According to the invention, through the arrangement of the push-pull rod and the telescopic rod, in the rotation process of the contact wheel, when the film leaves the tension piece, the elastic piece releases the elastic force, so that the push-pull rod and the telescopic rod are reset, the reset push-pull rod and the telescopic rod impact the wall body of the push-pull cavity and the stirring piece, the contact wheel is further vibrated, and through the vibration, the film which is not in contact with the contact wheel is shaken to a certain degree, so that impurities adhered to the lower surface of the film are separated from the film, and the film is prevented from being deformed due to the fact that the film and the contact wheel extrude the impurities together when the film is in contact with the contact wheel, and the final winding quality is further influenced.
Drawings
FIG. 1 is a schematic view of the internal structure of a contact wheel according to the present invention;
FIG. 2 is an enlarged view of a portion of the structure A of FIG. 1;
FIG. 3 is a schematic view of a rotary slot of the present invention;
FIG. 4 is a schematic view of the toggle member of the present invention;
fig. 5 is a schematic diagram of the prior art.
In the figure: 1. a contact wheel; 2. a rotating shaft; 3. a cavity; 4. rotating the groove; 5. fixing the rod; 6. a toggle piece; 7. a telescoping chamber; 8. a telescopic rod; 9. a deflection chamber; 10. a push-pull cavity; 11. a push-pull rod; 12. a tension member; 13. a connecting rod; 14. an elastic member; 15. and a through hole.
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.
Referring to fig. 1 and 3, a thermoplastic polyurethane elastomer cast film rewinding machine comprises a contact wheel 1, rotating shafts 2 are welded at two sides of the contact wheel 1, the rotating shafts 2 are driven by a power mechanism (such as a motor), a cavity 3 is formed in the contact wheel 1 and the rotating shafts 2 in a common axial penetrating manner, a rotating groove 4 is formed in the middle position inside the contact wheel 1, the diameter of the rotating groove 4 is larger than that of the cavity 3, a fixing rod 5 is installed in the cavity 3, two ends of the fixing rod 5 and an external mechanism (a mounting table in the prior art) are welded and fixed, the fixing rod 5 and the rotating shafts 2 are in relative motion arrangement, a stirring piece 6 is welded on the fixing rod 5, the stirring piece 6 is positioned in the rotating groove 4, telescopic cavities 7 are circumferentially arranged at positions outside the rotating groove 4 inside the contact wheel 1 at equal intervals, telescopic rods 8 are slidably installed in the telescopic cavities 7, and inner ends of the telescopic rods 8 penetrate through the contact wheel 1, and extend into the rotary slot 4, the inner end of the telescopic rod 8 contacts with the circumferential side surface of the toggle piece 6, the positions of the contact wheel 1, which are positioned at the left and right sides of the telescopic cavity 7, are respectively provided with a deflection cavity 9, the positions of the contact wheel 1, which are positioned at the side of the deflection cavity 9, which is far away from the telescopic cavity 7, are respectively provided with a push-pull cavity 10, one side of the deflection cavity 9 is communicated with the telescopic cavity 7, the other side of the deflection cavity 9 is communicated with the push-pull cavity 10, a push-pull rod 11 is slidably arranged in the push-pull cavity 10, the rod body of the push-pull rod 11 extends out of the push-pull cavity 10, the left and right sides of the contact wheel 1 are respectively provided with tension pieces 12 at equal circumferential intervals, the rod body of the push-pull rod 11 and the side surface of the tension piece 12 facing the contact wheel 1 are welded and fixed, a connecting rod 13 is arranged in the cavity of the deflection cavity 9, one end of the connecting rod 13 is hinged and fixed with the outer end of the telescopic rod 8, and the other end of the connecting rod 13 is hinged and fixed with the piston end of the push-pull rod 11, in the process that the small-area film is contacted with the circumferential side faces of the contact wheel 1 and the tension member 12, the power mechanism drives the contact wheel 1 and the tension member 12 to rotate (the rotating speed is the same as the transmission speed of the film), when the contact wheel 1 rotates to the position contacted with the film, the stirring member 6 drives the telescopic rod 8 to further retract into the telescopic cavity 7, so that the telescopic rod 8 drives the push-pull rod 11 and the tension member 12 to extend out along the axial direction of the contact wheel 1 through the connecting rod 13, further the small-area film is axially pulled (the pulling force is smaller than the limit elastic force of the film, the film is prevented from being irreversibly deformed), the small-area film is not easy to wrinkle, the rolling quality is influenced, and then, the film is separated from the tension piece 12 along with the continuous rotation of the contact wheel 1, then, when the contact wheel 1 drives the telescopic rod 8 to be close to the film again, the telescopic rod 8 is reset through self gravity, the push-pull rod 11 is driven to reset, the reset push-pull rod 11 and the telescopic rod 8 impact the wall body of the push-pull cavity 10 and the circumferential side face of the stirring piece 6, the contact wheel 1 is further made to vibrate, and through the vibration, the film which is not in contact with the contact wheel 1 is further made to shake to a certain degree, and impurities adhered to the lower surface of the film are made to be separated from the film, so that when the film is prevented from being in contact with the contact wheel 1, the film and the contact wheel 1 extrude impurities together, the film is deformed, and the final rolling quality is influenced.
Please refer to fig. 1 and 4, the circumferential side of the toggle member 6 is welded with a bump structure, the rear side of the bump structure and the circumferential side of the toggle member 6 form a smooth transition arrangement, the bump structure is an inclination angle arrangement, the inclination angle of the bump structure corresponds to the angle of the contact wheel 1 contacting the film, through the arrangement of the bump structure, when the telescopic rod 8 is driven by the contact wheel 1 and contacts with the bump structure, the telescopic rod 8 can move along the circumferential side of the bump structure, and further the outer end of the telescopic rod 8 is further received into the telescopic cavity 7, thereby realizing the above functions.
The telescopic rod 8 is in sealed sliding connection with a position penetrating through the contact wheel 1, (the connection relationship is similar to the connection relationship between an oil cylinder and a piston in the prior art), the piston end of the push-pull rod 11 is in sealed sliding connection with the wall body of the push-pull cavity 10, and through the sealed arrangement of the structure, the change of gas pressure is realized through the movement of the structure, so that the subsequent negative pressure is generated smoothly.
When the bump structure drives the telescopic rod 8 to extend into the telescopic cavity 7 at the limit, the connecting rod 13 drives the push-pull rod 11 to move towards the direction away from the telescopic cavity 7, the occupied space is occupied by moving outwards when the telescopic rod 8 extends into the telescopic cavity 7 at the limit, when the push-pull rod 11 is far away from the telescopic cavity 7, the cavity in the push-pull cavity 10, which is positioned at the position of the push-pull rod 11 facing one side of the telescopic cavity 7, is occupied by the axial direction, the volume of the occupied space which is moved outwards is smaller than the volume of the occupied space by the axial direction, when the telescopic rod 8 and the push-pull rod 11 move to the above state, negative pressure can be generated in the push-pull cavity 10, and through the negative pressure, the film is pulled by the tension member 12 to provide fixing force.
Referring to fig. 1 and 2, an elastic member 14 is installed in the push-pull chamber 10 at a position opposite to the telescopic chamber 7 at the piston end of the push-pull rod 11, one end of the elastic member 14 is fixedly connected with the piston end of the push-pull rod 11, the other end of the elastic member 14 is fixedly connected with the inner wall of the push-pull chamber 10 facing the telescopic chamber 7, and the elastic force of the elastic member 14 is greater than the gravity of the telescopic rod 8, so that after the tension member 12 is separated from the film by the arrangement of the elastic member 14, because the telescopic rod 8 is separated from the protruding block structure of the toggle member 6 at this time, the elastic member 14 releases the elastic force and drives the telescopic rod 8 to rapidly reset, the impact force generated by the telescopic rod 8 and the push-pull rod 11 is further increased, and the effect of separating impurities from the film is improved.
Through holes 15 are jointly formed in the push-pull rod 11 and the tension member 12, one side of each through hole 15 is communicated with a cavity in the push-pull cavity 10, which is located at the position of one side of the push-pull rod 11 facing the telescopic cavity 7, the other side of each through hole 15 is formed in the circumferential side face of the tension member 12, and when negative pressure is generated in the push-pull cavity 10, the negative pressure passes through the through holes 15 and further exerts attractive force (the attractive force is smaller than the limit deformation force of the film) on the film attached to the surface of the tension member 12, so that the attachment force between the tension member 12 and the film is increased, and the tension member 12 can pull the film more effectively.
The circumference side of tension piece 12 is the arc structure setting, and the diameter of this arc structure is greater than the diameter of contact wheel 1, sets up through the arc structure that sets up on the tension piece 12 circumference side, and then increases the area of contact of film and tension piece 12 for laminating power between film and the tension piece 12 increases, thereby further reduces the probability that the small size film produced the fold.
The use method (working principle) of the invention is as follows:
when the device works, firstly, a large-area film on a feeding wheel (in the prior art) passes through a blade (in the prior art), so that the blade cuts the large-area film into small-area films, then, the small-area films sequentially pass through a contact wheel 1 and a tension wheel (in the prior art), and are finally wound on the surface of a winding wheel (in the prior art), as shown in fig. 5, in the process, a power mechanism (in the prior art, such as a motor) drives the contact wheel 1 to rotate through a rotating shaft 2, so that a tension piece 12 and a telescopic rod 8 synchronously rotate, when the contact wheel 1 and the tension piece 12 are in contact with the small-area films, the telescopic rod 8 is in contact with a convex block structure of a stirring piece 6, so that the telescopic rod 8 is further retracted into a telescopic cavity 7, and a connecting rod 13 drives a push-pull rod 11 and the tension piece 12 to axially move, so that Zhang Lijian applies an axial pulling force to the small-area film, in the process, the push-pull rod 11 compresses the elastic part 14, and a negative pressure is generated in a cavity body positioned on one side of the push-pull rod 11 facing the telescopic cavity 7 in the push-pull cavity 10, the negative pressure passes through the through hole 15 to further attract and fix a film attached to the surface of the tension part 12, then, along with the continuous rotation of the contact wheel 1, after a small-area film is separated from the contact wheel 1, because the telescopic rod 8 is separated from the bump structure at the moment, the elastic part 14 releases the elastic force and drives the push-pull rod 11 to reset, the connecting rod 13 drives the telescopic rod 8 to synchronously reset, in the process, the push-pull rod 11 impacts the inner wall of the push-pull cavity 10, the telescopic rod 8 impacts the circumferential side surface of the stirring part 6, the tension part 12 impacts the contact wheel 1, and through the action, the contact wheel 1 vibrates, and the film which is not in direct contact with the contact wheel 1 shakes, the impurities on the lower surface of the film are removed, and then the tension member 12 contacts the small-area film again along with the continuous rotation of the contact wheel 1, which is a work cycle.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A thermoplastic polyurethane elastomer casting film rewinding machine comprises a contact wheel (1), and is characterized in that: the device is characterized in that a rotating shaft (2) is fixedly arranged at the two sides of the contact wheel (1), the contact wheel (1) and the rotating shaft (2) are provided with a cavity (3) in a penetrating manner, a rotating groove (4) is formed in the middle of the inside of the contact wheel (1), a fixed rod (5) which moves relative to the rotating shaft (2) is fixedly arranged in the cavity (3), a toggle piece (6) in the rotating groove (4) is fixedly arranged on the fixed rod (5), telescopic cavities (7) are formed in the positions, located on the outer side of the rotating groove (4), of the inside of the contact wheel (1) at circumferential equal intervals, a telescopic rod (8) with an inner end penetrating through the contact wheel (1) is slidably arranged in the telescopic cavities (7), the inner end of the telescopic rod (8) is in contact with the circumferential side face of the toggle piece (6), deflection cavities (9) are formed in the positions, located on the left side and the right side of the telescopic cavity (7), of the inside of the contact wheel (1), the push-pull wheel (1) is provided with a push-pull cavity (9), the position far away from the telescopic cavity (10) is communicated with the tension push-pull cavity (12), and the push-pull cavity (10) is arranged in the push-pull cavity (12), the side face, facing the contact wheel (1), of the rod body of the push-pull rod (11) is fixedly connected with the side face of the tension piece (12), a connecting rod (13) is installed in the cavity of the deflection cavity (9), and two ends of the connecting rod (13) are hinged and fixed with the outer end portion of the telescopic rod (8) and the piston end of the push-pull rod (11) respectively.
2. The rewinding machine for cast films of thermoplastic polyurethane elastomers according to claim 1, characterized in that: the diameter of the rotary groove (4) is larger than that of the cavity (3), a lug structure with an inclined angle is fixedly mounted on the circumferential side face of the stirring piece (6), the rear side of the lug structure and the circumferential side face of the stirring piece (6) form a smooth transition arrangement, and the inclined angle of the lug structure corresponds to the angle of the contact wheel (1) contacting the film.
3. The thermoplastic polyurethane elastomer cast film rewinding machine as claimed in claim 2, wherein: the telescopic rod (8) is in sealed movable connection with the position penetrating through the contact wheel (1), and the piston end of the push-pull rod (11) is in sealed movable connection with the wall body of the push-pull cavity (10).
4. The rewinding machine for cast films of thermoplastic polyurethane elastomers according to claim 3, characterized in that: when lug structure drives telescopic link (8) limit and stretches into flexible chamber (7), connecting rod (13) drive push-and-pull rod (11) and remove to the direction of keeping away from flexible chamber (7), shared space is for moving occupation space outward when telescopic link (8) limit stretches into flexible chamber (7), when flexible chamber (7) are kept away from in push-and-pull rod (11), lie in push-and-pull rod (11) in push-and-pull chamber (10) and be axial occupation space towards the cavity of flexible chamber (7) one side position, the volume that moves occupation space outward is less than axial occupation space's volume.
5. The rewinding machine for cast films of thermoplastic polyurethane elastomers according to claim 1, characterized in that: an elastic piece (14) is fixedly arranged between the inner wall of the push-pull cavity (10) facing the telescopic cavity (7) and the piston end of the push-pull rod (11), and the elasticity of the elastic piece (14) is larger than the gravity of the telescopic rod (8).
6. The rewinding machine for cast films of thermoplastic polyurethane elastomers according to claim 4, characterized in that: the inner parts of the push-pull rod (11) and the tension member (12) are jointly provided with a through hole (15), one side of the through hole (15) is communicated with a cavity in the push-pull cavity (10) at the position of one side of the push-pull rod (11) facing the telescopic cavity (7), and the other side of the through hole (15) is arranged on the circumferential side surface of the tension member (12).
7. The rewinding machine for cast films of thermoplastic polyurethane elastomers according to claim 1, characterized in that: the circumferential side of the tension member (12) is of an arc-shaped structure, and the diameter of the arc-shaped structure is larger than that of the contact wheel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211332419.8A CN115818318B (en) | 2022-10-28 | 2022-10-28 | Thermoplastic polyurethane elastomer curtain coating membrane rewinding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211332419.8A CN115818318B (en) | 2022-10-28 | 2022-10-28 | Thermoplastic polyurethane elastomer curtain coating membrane rewinding machine |
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| Publication Number | Publication Date |
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| CN115818318A true CN115818318A (en) | 2023-03-21 |
| CN115818318B CN115818318B (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211332419.8A Active CN115818318B (en) | 2022-10-28 | 2022-10-28 | Thermoplastic polyurethane elastomer curtain coating membrane rewinding machine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1026764B (en) * | 1953-02-10 | 1958-03-27 | Maschf Augsburg Nuernberg Ag | Roller with coating bars for smoothing when winding continuous paper or fabric webs |
| JP2012062553A (en) * | 2010-09-17 | 2012-03-29 | Sumitomo Metal Mining Co Ltd | Method and apparatus for stretching wrinkle on can roll |
| CN107973165A (en) * | 2017-11-22 | 2018-05-01 | 南通华勤纺织装饰有限公司 | A kind of tentering machine on automatic poking side |
| CN113830610A (en) * | 2020-06-08 | 2021-12-24 | 拓卡奔马机电科技有限公司 | A turn-up surface fabric opening device for spreading cloth machine |
| CN115043257A (en) * | 2022-05-09 | 2022-09-13 | 江苏泰富恒通特种材料有限公司 | Be used for welded welding wire production take-up |
-
2022
- 2022-10-28 CN CN202211332419.8A patent/CN115818318B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1026764B (en) * | 1953-02-10 | 1958-03-27 | Maschf Augsburg Nuernberg Ag | Roller with coating bars for smoothing when winding continuous paper or fabric webs |
| JP2012062553A (en) * | 2010-09-17 | 2012-03-29 | Sumitomo Metal Mining Co Ltd | Method and apparatus for stretching wrinkle on can roll |
| CN107973165A (en) * | 2017-11-22 | 2018-05-01 | 南通华勤纺织装饰有限公司 | A kind of tentering machine on automatic poking side |
| CN113830610A (en) * | 2020-06-08 | 2021-12-24 | 拓卡奔马机电科技有限公司 | A turn-up surface fabric opening device for spreading cloth machine |
| CN115043257A (en) * | 2022-05-09 | 2022-09-13 | 江苏泰富恒通特种材料有限公司 | Be used for welded welding wire production take-up |
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| CN115818318B (en) | 2023-10-03 |
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