CN209755874U - Calendering device - Google Patents

Calendering device Download PDF

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Publication number
CN209755874U
CN209755874U CN201920262619.8U CN201920262619U CN209755874U CN 209755874 U CN209755874 U CN 209755874U CN 201920262619 U CN201920262619 U CN 201920262619U CN 209755874 U CN209755874 U CN 209755874U
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China
Prior art keywords
heat
calendering
conducting film
scraper
roller
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CN201920262619.8U
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Chinese (zh)
Inventor
杨文斌
王亚东
陈浩
吴永飞
唐春雷
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World Star Polytron Technologies Inc
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World Star Polytron Technologies Inc
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Abstract

The utility model discloses a calendering device, which comprises a dust removing mechanism, wherein the dust removing mechanism is provided with a dust removing piece and a first driver connected with the dust removing piece, and one side wall of the dust removing piece facing to a heat conducting film is provided with an air port; the first driver generates suction force or blowing force on the heat-conducting film through the air opening. When the heat-conducting film drawn out from the first discharging shaft and the bottom film drawn out from the second discharging shaft pass through the pressing process between the first pressing roller and the second pressing roller, under the action of the suction force or the blowing force, scraps, broken edges and other impurities attached to the surface of the heat-conducting film are sucked into the inner cavity of the dust removing part through the air opening or blown away from the heat-conducting film, so that the surface of the heat-conducting film entering the calendering roller set is clean, the first pressing roller and the second pressing roller cannot be polluted in the calendering process, and the appearance and the performance of a product are improved.

Description

Calendering device
Technical Field
The utility model belongs to the technical field of the calendering, concretely relates to calendering device.
Background
High-integration and high-performance electronic devices are becoming mainstream in the industry, and the higher the performance processing power of the chip and the processor is, the larger the heat emitted is, and the traditional way of utilizing heat dissipation devices such as fans and the like is obviously not suitable for the trend of ultra-thinning of the digital products. At present, the heat conductive graphite film, also called as an artificial synthetic graphite film, has high heat conductivity, is an excellent heat dissipation material, and is increasingly used in current electronic products.
The heat-conducting graphite film coiled material is formed by firstly sintering a polyimide film serving as a raw material at a high temperature, then rolling the polyimide film by a rewinding machine, and finally pressing the polyimide film and a release film by a rolling device.
At present, after a graphite film is subjected to high-temperature sintering and rolling processes, defects such as bright edges, chippings and broken edges exist on the surface of the graphite film, and on the existing graphite film rolling device in the market, the defects such as bubbles, surface bulges and flanging which affect the product quality are directly generated on the surface of the film after rolling, or the defects such as the chippings and the broken edges are adhered to a roller of the rolling device to form a pollution source, so that the poor repeatability of the surface of the rolled film is indirectly caused, and the appearance and the performance of the product are affected by the poor phenomena.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model discloses the technical problem that will solve lies in that current calendering device arouses the bad phenomenon of heat conduction membrane surface quality, leads to the appearance and the poor problem of performance of product after the calendering.
Therefore, the utility model provides a calendering device, include
The calendering roller group is provided with a first pressing roller and a second pressing roller which are relatively abutted and can be rotatably arranged;
The first discharging shaft and the second discharging shaft are arranged on the same side of the calendering roller group;
The material receiving shaft is arranged on the other side of the calendering roller group and is used for pressing and winding the heat-conducting film and the bottom film which are respectively drawn out from the first discharging shaft and the second discharging shaft on the first pressing roller and the second pressing roller;
The dedusting mechanism is provided with at least one dedusting piece which is arranged close to the heat-conducting film before entering the calender roll group, one side wall surface of the dedusting piece facing the heat-conducting film is provided with at least one air opening, and a first driver connected with the dedusting piece, and the first driver generates suction force or blowing force on the heat-conducting film through the air opening.
Preferably, in the above rolling device, the first driver is a suction fan or a suction pump, and the suction force is generated; or
The first driver is a blower or an air gun that generates the purge force.
Preferably, in the above rolling device, the tuyere is a slit extending along the axis of the first discharge shaft.
Preferably, in the above rolling device, the dust removing member is a hollow rod.
Preferably, in the rolling device described above, the dust removing mechanism further includes at least one scraper which can abut against the circumferential outer wall surface of the first pressing roller or the second pressing roller; and the second driver is connected with the scraper and drives the scraper to slide in a reciprocating manner along the axial direction of the first press roller.
Further preferably, in the rolling device described above, the inner wall surface of the scraper facing the first pressing roller or the second pressing roller is an arc surface, and the arc surface is matched with the circumferential outer wall surface of the corresponding pressing roller.
Preferably, in the calendering device, the scraper has a hollow inner cavity, the hollow inner cavity is suitable for containing a cleaning agent, and at least one nozzle is formed on an inner wall surface of the scraper facing to each corresponding press roller.
Preferably, in the above rolling device, the inner wall surface of the scraper is made of a flexible material; and/or
And the inner wall surface of the scraper is provided with a dust-free flexible layer so as to enable the inner wall surface of the scraper to be in flexible contact with the circumferential outer wall surface of the corresponding press roller.
Preferably, the calendering device further comprises a first guide roller rotatably disposed between the calender roller group and the second discharge shaft, and the first guide roller is used for guiding the bottom film to enter between the first pressing roller and the second pressing roller along a linear direction; and/or
the second guide roll is rotatably arranged between the calender roll group and the material receiving shaft and is used for guiding the heat-conducting film subjected to calendering to be wound on the material receiving shaft along the linear direction.
Preferably, the calendering device further includes at least one first deviation rectifier and at least one second deviation rectifier, which are respectively disposed, and the first deviation rectifier and the second deviation rectifier are respectively used for adjusting the movement of the bottom film and the calendered heat-conducting film.
The utility model discloses technical scheme has following advantage:
1. The utility model provides a calendering device, which is provided with a dust removing mechanism, wherein the dust removing mechanism is provided with a dust removing piece and a first driver connected with the dust removing piece, and one side wall of the dust removing piece facing to a heat conducting film is provided with an air port; the first driver generates suction force or blowing force on the heat-conducting film through the air opening.
The rolling device with the structure has the advantage that the dust removing mechanism is provided with a dust removing part close to the heat conducting film before entering the rolling roller group. When the heat-conducting film drawn out of the first discharging shaft and the bottom film drawn out of the second discharging shaft pass through the first pressing roller and the second pressing roller in a laminating process, the first driver is started, suction force is generated on the surface of one side of the heat-conducting film before entering the calender roll group through the air opening, and under the action of the suction force, scraps, broken edges and other impurities attached to the surface of the heat-conducting film are sucked into the inner cavity of the dust removing part through the air opening, then enter the first driver and finally are discharged to the outside; or the first driver applies blowing force to the surface of the heat-conducting film, and under the action of the blowing force, scraps, broken edges and other impurities attached to the surface of the heat-conducting film are blown away, so that the surface of the heat-conducting film entering the calender roll set is clean, the first press roll and the second press roll cannot be polluted in the calendering process, meanwhile, the surface of the heat-conducting film product after calendering is clean, almost no pollutants exist, and the appearance and the performance of the product are improved.
2. in the calendering device provided by the utility model, the air port is a slit extending along the axis of the first discharging shaft, so that the air port is prevented from being too large, and the suction force or the blowing force generated on the heat-conducting film is too large, so that the heat-conducting film is bent and can be influenced to move along the linear direction; due to the arrangement of the slit, the suction force applied to the heat-conducting film by the first driver through the slit is moderate, and the normal operation of the heat-conducting film can not be influenced when chips, broken edges and other impurities on the surface of the heat-conducting film are sucked or blown away.
3. The utility model provides a calendering device, the dust removal mechanism also comprises at least one scraper which can be abutted against the circumferential outer wall surface of the first compression roller or the second compression roller; and the second driver is connected with the scraper and drives the scraper to slide in a reciprocating manner along the axial direction of the first press roller.
The calendering device of this structure, all set up the scraper on the circumference outer wall of first compression roller and second compression roller, prevent that the wind gap from inhaling or sweeping when unclean to impurity such as piece on the heat conduction membrane, the piece can be transmitted on first compression roller and the second compression roller, the setting of scraper, wipe off impurity such as remaining a small amount of pieces on the circumference outer wall of first compression roller and second compression roller, ensure to roll the in-process, two compression roller surfaces are clean, can not influence follow-up calendering in-process membrane repetitive pollution because the compression roller surface is unclean.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a rolling device provided in embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a scraper of the calendering apparatus in fig. 1.
description of reference numerals: 1-a first discharge shaft; 2-a second discharge shaft; 31-a first guide roll; 32-a second guide roll; 41-a first error corrector; 42-a second error corrector; 51-a first press roll; 52-a second press roll; 6-material receiving shaft; 7-a suction fan; 8-a scraper; 81-nozzle.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The present embodiment provides a rolling device, as shown in fig. 1, including a roll group, a first discharging shaft 1, a second discharging shaft 2, a receiving shaft 6, and a dust removing mechanism.
As shown in fig. 1, the calender roll group has a first press roll 51 and a second press roll 52 which are relatively abutted and rotatably arranged, and preferably, the first press roll 51 and the second press roll 52 have the same diameter and are symmetrically arranged. The first discharging shaft 1 and the second discharging shaft 2 are arranged on the same side of the calendering roller group, and the first discharging shaft 1 and the second discharging shaft 2 are respectively suitable for sleeving or winding a heat-conducting film roll and a bottom film roll; the material receiving shaft 6 is arranged at the other side of the calender roll group and is used for pressing and winding the heat-conducting film and the bottom film which are respectively drawn out from the first discharging shaft 1 and the second discharging shaft 2 on the first pressing roll 51 and the second pressing roll 52. The axes of the first discharging shaft 1, the second discharging shaft 2, the material receiving shaft 6, the first press roll 51 and the second press roll 52 are all parallel. For example, the axis extends in a horizontal direction, and the first press roller 51 is positioned above the second press roller 52.
Preferably, in the calendering process, the material receiving shaft 6 is driven by a motor to rotate, and under the action of the heat-conducting film and the bottom film, the material receiving shaft 6 drives the first discharging shaft 1 and the second discharging shaft 2 to rotate. Of course, the first discharging shaft 1 and the second discharging shaft 2 may be driven by one motor to rotate synchronously, or different motors may be used to drive the respective rotation, and the speed of the relative rotation is determined by the actual use condition, and is not limited specifically.
As shown in fig. 1, the dust removing mechanism has at least one dust removing member disposed near the heat conductive film before entering the calender roll group, and a first driver connected to the dust removing member, wherein a plurality of air ports are formed in a side wall surface of the dust removing member facing the heat conductive film, and the first driver generates suction force to the heat conductive film through the air ports. Before the heat-conducting film does not enter the calender roll group, a first driver is started, the first driver generates suction force on the surface of one side of the heat-conducting film through an air opening, under the action of the suction force, the impurities such as scraps, broken edges and the like adsorbed on the surface of the heat-conducting film are sucked into the dust removal part through the air opening and then enter the first driver, and finally discharged to the outside, so that the impurities on the heat-conducting film before calendering are sucked away, the surface of the heat-conducting film is a clean surface, the impurities cannot be transmitted to a first compression roller 51 and a second compression roller 52 in the calendering process, and the compression rollers are ensured not to be polluted; meanwhile, the surface appearance of a heat-conducting film product formed by rolling the heat-conducting film and the bottom film is clean, and the performance of the heat-conducting film product is improved.
For example, the first driver is a suction fan 7 or an air pump, and the suction force applied to the heat-conducting membrane by the suction fan 7 or the air pump sucks off impurities such as debris on the surface of the heat-conducting membrane.
The dust removing member is preferably a cylindrical rod body, a plurality of air ports are formed in the cylindrical rod body, the air ports may be slits extending along the axis of the first discharging shaft 1, for example, the length of the slits is not less than the width of the heat conducting film, or the length of the slits is less than the width of the heat conducting film. The slit is arranged to prevent the air opening from being too large, and the suction force generated on the heat-conducting film is too large, so that the heat-conducting film is bent and can be influenced to move along the linear direction; the suction force applied to the heat-conducting film by the first driver through the slit is moderate, and the normal operation of the heat-conducting film is not influenced while debris, broken edges and other impurities on the surface of the heat-conducting film are sucked.
As shown in fig. 1, the dust removing mechanism further includes scrapers 8 which can abut on the circumferential outer wall surfaces of the first pressing roller 51 and the second pressing roller 52, respectively; and a second driver connected to the scrapers 8 in a one-to-one correspondence, the second driver driving the scrapers 8 to make reciprocating sliding along the axial direction of the first press roller 51. For example, the second driver is a telescopic cylinder, the telescopic cylinder is connected to one side surface of the scraper 8, which is opposite to the first pressing roller 51 or the second pressing roller 52, the scraper 8 is driven to move through telescopic movement of the telescopic cylinder, so that the scraper 8 performs reciprocating wiping work along the axial direction of the first pressing roller 51, the cleaning of the peripheral surface of the pressing roller is realized, the scraper 8 scrapes impurities such as chips and the like on the circumferential outer wall surface of the corresponding pressing roller or received from a heat-conducting film, the first pressing roller 51 and the second pressing roller 52 keep clean circumferential surfaces, and the appearance and performance of subsequent rolled products are not affected.
Preferably, the inner wall surface of the scraper 8 facing the first pressing roller 51 or the second pressing roller 52 is a circular arc surface, and the circular arc surface is matched with the circumferential outer wall surface of the corresponding pressing roller. The arrangement of the arc surface ensures that the scraper 8 does not influence the normal rotation of the press roll when moving. The material of the inner wall surface of the scraper 8 is preferably a flexible material, such as rubber. When flexible material and compression roller contact, can not produce the mar to the surface of compression roller to apply and can be a little bit for 8 dynamics of scraping of scraper, make the effect of scraping off impurity better.
In order to scrape impurities on the circumferential outer wall surfaces of the two compression rollers cleaner, the scraper 8 is also provided with a hollow inner cavity, the hollow inner cavity is suitable for containing a cleaning agent, and a plurality of nozzles 81 are formed in the inner wall surface, facing the compression rollers, of the scraper 8. When the scraper 8 scrapes off impurities on the circumferential outer wall surface of the compression roller, the nozzle 81 of the scraper 8 can continuously spray cleaning agent, so that the impurities on the circumferential outer wall surface of the compression roller can be conveniently and cleanly scraped by the inner wall surface of the scraper 8. An exhaust fan can be arranged on the scraper 8, and the exhaust fan is used for timely absorbing impurities scraped from the compression roller by the scraper 8, so that the phenomenon that the impurities occupied on the scraper 8 are too much and reversely drop back to the compression roller is avoided.
As shown in fig. 1, the above-mentioned rolling apparatus further includes a first guide roll 31 rotatably disposed between the roll group and the second discharge shaft 2, for supporting the base film and guiding the base film in a linear direction between a first press roll 51 and a second press roll 52; and a second guide roll 32 rotatably disposed between the calender roll group and the take-up shaft 6, for supporting the heat conductive film after calendering, and guiding the heat conductive film after calendering to wind around the take-up shaft 6 in a linear direction. The first guide roller 31 and the second guide roller 32 are arranged to keep the linear motion of the base film and the heat-conducting film at the same height during the movement of the base film from the second discharging shaft 2 to the receiving shaft 6. In order to detect whether the lateral wall end faces of the bottom film and the heat conducting film after calendering are parallel and level or not in time, the calendering device further comprises a first deviation corrector 41 and a second deviation corrector 42 which are respectively arranged at the positions close to the bottom film and the heat conducting film after calendering, under the support of a first guide roller, the first deviation corrector 41 is convenient to adjust the motion of the bottom film in time, under the support of a second guide roller, the second deviation corrector 42 is convenient to adjust the motion of the heat conducting film after calendering, and the lateral wall end faces of the bottom film and the heat conducting film after calendering are parallel and level. The deviation rectifier adopts the existing middle deviation rectifier, the specific structure is not limited, and the existing deviation rectifier is only needed.
In the embodiment, the bottom film is preferably a PET release film, the heat-conducting film is preferably a heat-conducting graphite film,
Provide heat conduction graphite membrane through first blowing axle 1, second blowing axle 2 provides PET and leaves the type membrane, the graphite membrane is before getting into first compression roller 51 and second compression roller 52, the suction fan 7 is siphoned away the impurity such as piece on the graphite membrane surface through the wind gap on the dust removal piece, clean graphite membrane in surface and PET are from the type membrane and get into between first compression roller 51 and the second compression roller 52, two compression rollers with heat conduction graphite membrane with from type membrane calendering molding, calendering molding's heat conduction membrane is at last through receiving the material axle rolling. Meanwhile, in the rolling process, the circumferential outer wall surfaces of the first compression roller 51 and the second compression roller 52 are respectively scraped or wiped by the two scrapers 8, so that the surfaces of the two compression rollers are kept clean, and the membrane is prevented from being repeatedly polluted in the rolling process; the transmission guide roller and the deviation rectifier are respectively arranged after the material is discharged and before the material is received, so that the edges of the discharged material and the received material are ensured to be neat, and the whole equipment is controlled by a microcomputer program.
As a modified embodiment of example 1: the scraper 8 is not required to be provided with a nozzle, the dust removing mechanism also comprises a bracket, and the first driver is arranged on the bracket; and a nozzle provided on the holder, the nozzle opening facing the circumferential outer wall surface of the first press roller 51 or the second press roller 52. The cleaning degree of the press roller can be further enhanced by spraying the externally-connected cleaning agent to the circumferential outer wall surface of the press roller through the spray heads.
As a second alternative embodiment of example 1, the inner wall surface of the scraper 8 may not be made of a flexible material, and the dust removing mechanism further includes a dust-free flexible layer provided on the inner wall surface of the scraper 8, for example, a conventional dust-free cloth is used, and the dust-free flexible layer is in flexible contact with the circumferential outer wall surface of each of the corresponding press rolls, so that the circumferential outer wall surface of the press roll is wiped without scratching.
Example 2
This example provides a rolling apparatus which differs from the rolling apparatus provided in example 1 only in that:
The first driver applies blowing force to the heat-conducting film through the air opening, continuously blows air to the surface of one side of the heat-conducting film, applies blowing force to the surface of the side of the heat-conducting film before rolling, blows away impurities such as scraps, broken edges and the like adsorbed on the surface of the heat-conducting film under the action of the blowing force, and enables the surface of the heat-conducting film to be a clean surface, so that the impurities cannot be transmitted to the first compression roller 51 and the second compression roller 52 in the rolling process, and the compression rollers are ensured not to be polluted; meanwhile, the surface appearance of a heat-conducting film product formed by rolling the heat-conducting film and the bottom film is clean, and the performance of the heat-conducting film product is improved.
For example, the first driver is a blower or an air gun, and the blower or the air gun applies a blowing force to the heat conductive film to blow off impurities such as debris on the surface of the heat conductive film.
Example 3
The present embodiment provides a rolling apparatus which is different from the rolling apparatus provided in embodiment 1 in that: the scraper 8 does not need to be provided with a nozzle, for example, the dust removing mechanism further comprises a bracket, and the first driver is arranged on the bracket; and a nozzle provided on the holder, the nozzle opening facing the circumferential outer wall surface of the first press roller 51 or the second press roller 52. The cleaning degree of the press roller can be further enhanced by spraying the externally-connected cleaning agent to the circumferential outer wall surface of the press roller through the spray heads.
The inner wall surface of the scraper 8 in the above embodiments 1, 2 and 3 may not be made of a flexible material, and the dust removing mechanism further includes a dust-free flexible layer provided on the inner wall surface of the scraper 8, for example, an existing dust-free cloth is used, the dust-free flexible layer and the circumferential outer wall surface of each corresponding press roller form a flexible contact, and the circumferential outer wall surface of the press roller is wiped without scratching. Or the inner wall surface of the scraper is made of flexible materials, and meanwhile, a dust-free flexible layer is arranged, so that flexible contact is formed between the inner wall surface of the scraper 8 and the circumferential outer wall surface of the press roll.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description.

Claims (10)

1. A rolling device is characterized by comprising
At least one calender roll group, which is provided with a first press roll (51) and a second press roll (52) which are relatively abutted and rotatably arranged;
The first discharging shaft (1) and the second discharging shaft (2) are arranged on the same side of the calendering roller group;
the material receiving shaft (6) is arranged on the other side of the calendering roller group and is used for pressing and then winding the heat-conducting film and the bottom film which are respectively drawn out from the first discharging shaft (1) and the second discharging shaft (2) on the first pressing roller (51) and the second pressing roller (52);
the dedusting mechanism is provided with at least one dedusting piece which is arranged close to the heat-conducting film before entering the calender roll group, one side wall surface of the dedusting piece facing the heat-conducting film is provided with at least one air opening, and a first driver connected with the dedusting piece, and the first driver generates suction force or blowing force on the heat-conducting film through the air opening.
2. Calendering device according to claim 1, wherein said first drive is a suction fan (7) or a suction pump, generating said suction force; or
The first driver is a blower or an air gun that generates the purge force.
3. Calendering device according to claim 1, characterized in that said tuyere presents a slit extending along the axis of the first discharge shaft (1).
4. The calendering apparatus of any one of claims 1 to 3, wherein said dusting member is a hollow rod.
5. The calendering apparatus according to any one of claims 1 to 3, wherein the dedusting mechanism further comprises at least one scraper (8) abuttable on a circumferential outer wall surface of the first pressing roller (51) or the second pressing roller (52); and the second driver is connected with the scraper (8), and drives the scraper (8) to slide in a reciprocating manner along the axial direction of the first press roller (51).
6. A calendering device according to claim 5, wherein the inner wall surface of the scraper (8) facing the first press roll (51) or the second press roll (52) is a circular arc surface matching the circumferential outer wall surface of the respective press roll.
7. Calendering device according to claim 5, wherein the scraper (8) has a hollow inner cavity suitable for containing a cleaning agent, the scraper (8) having at least one orifice opening onto the inner wall facing the respective pressure roller.
8. Calendering device according to claim 5, characterized in that the inner wall surface of the scraper (8) is made of a flexible material; and/or
And a dust-free flexible layer is arranged on the inner wall surface of the scraper (8) so as to enable the inner wall surface of the scraper (8) to be in flexible contact with the circumferential outer wall surface of each corresponding press roller.
9. A calendering apparatus according to any one of claims 1 to 3, further comprising a first guide roll (3) rotatably disposed between the calender roll group and the second discharge shaft (2) for supporting the base film and guiding the base film in a linear direction into between the first press roll (51) and the second press roll (52); and/or
the second guide roll (32) is rotatably arranged between the calender roll group and the material receiving shaft (6) and is used for supporting the heat-conducting film after calendering and guiding the heat-conducting film after calendering to be wound on the material receiving shaft (6) along the linear direction.
10. Calendering device according to claim 9, further comprising at least a first and a second rectifier (41, 42) respectively provided, said first and second rectifier (41, 42) being adapted to regulate the movement of the bottom film and of the calendered heat-conducting film respectively.
CN201920262619.8U 2018-03-01 2019-03-01 Calendering device Active CN209755874U (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN2018202903035 2018-03-01
CN201820290303 2018-03-01
CN2018202903143 2018-03-01
CN201820290314 2018-03-01

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Publication Number Publication Date
CN209755874U true CN209755874U (en) 2019-12-10

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN209755874U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112570455A (en) * 2020-11-17 2021-03-30 湖南仁发材料科技有限公司 Metal material calendering equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112570455A (en) * 2020-11-17 2021-03-30 湖南仁发材料科技有限公司 Metal material calendering equipment

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