CN113546530B - Supporting component of PTFE enhanced hollow fiber composite membrane - Google Patents
Supporting component of PTFE enhanced hollow fiber composite membrane Download PDFInfo
- Publication number
- CN113546530B CN113546530B CN202110968220.3A CN202110968220A CN113546530B CN 113546530 B CN113546530 B CN 113546530B CN 202110968220 A CN202110968220 A CN 202110968220A CN 113546530 B CN113546530 B CN 113546530B
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- rod
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- pressing ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/30—Polyalkenyl halides
- B01D71/32—Polyalkenyl halides containing fluorine atoms
- B01D71/36—Polytetrafluoroethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a PTFE enhanced hollow fiber composite membrane, which comprises a support component, wherein a fixing component is arranged behind the support component, a surrounding component is arranged at the top end of the support component, a limiting component is arranged outside the fixing component, the support component comprises a front pressing ring and a rear pressing ring arranged behind the front pressing ring, a first rolling track is arranged on the periphery side of the front pressing ring, a clamping convex block is fixedly connected behind the front pressing ring, a clamping groove which is in clamping connection with the clamping convex block is arranged in front of the rear pressing ring, and a second rolling track is arranged on the periphery side of the rear pressing ring. The reinforced composite structure is formed by combining the multi-layer PTFE films, the reinforced composite structure is pressed and fixed through the front pressing ring and the rear pressing ring, and then the surrounding assembly is driven by the fixing assembly to surround the pressing ring to uniformly fix each part on the periphery of the pressing ring under stress, so that the phenomena of damage and rupture of the films caused by uneven stress and pollution to the composite film are avoided, and the phenomenon of manual pressing is replaced.
Description
Technical Field
The invention belongs to the field of PTFE (polytetrafluoroethylene) films, and particularly relates to a supporting component of a PTFE (polytetrafluoroethylene) reinforced hollow fiber composite film.
Background
PTFE film is made of polytetrafluoroethylene dispersion resin, and is divided into clothing film, pu Wei waterproof film, filtering film and purifying film by special process such as premixing, extrusion, calendaring, biaxial stretching. Conventional PTEF membranes may cause rupture of the membrane under excessive tension if subjected to water pressure or excessive pressure during operation, and a common solution is to use multiple layers of PTEF membrane to form a composite structure to accommodate the abrupt pressure or pressure. However, the fixed installation stress of the composite membrane is uneven, and improper operation may cause pollution of the membrane, and influence the filtering effect. Therefore, the supporting component of the PTFE reinforced hollow fiber composite membrane is provided.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a supporting component of a PTFE reinforced hollow fiber composite membrane, wherein a reinforced composite structure is formed by combining a plurality of PTFE membranes, the reinforced composite structure is pressed and fixed through a front pressing ring and a rear pressing ring, and then the surrounding component is driven by a fixing component to surround the pressing ring to uniformly fix each part on the periphery of the pressing ring under stress, so that the membrane is prevented from being damaged and broken due to uneven stress, and the phenomena of uneven stress and pollution to the composite membrane are replaced by manual pressing.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
the supporting component of the PTFE enhanced hollow fiber composite membrane is provided with a fixing component at the rear part of the supporting component, the top end of the supporting component is provided with a surrounding component, and the outer side of the fixing component is provided with a limiting component;
the support assembly comprises a front pressing ring and a rear pressing ring arranged behind the front pressing ring, a first rolling track is arranged on the periphery side of the front pressing ring, a clamping convex block is fixedly connected to the rear of the front pressing ring, a clamping groove which is in clamping connection with the clamping convex block is arranged in front of the rear pressing ring, and a second rolling track is arranged on the periphery side of the rear pressing ring;
the fixed assembly comprises a positioning center column, a rotating center column and a moving rod, wherein an L-shaped rod is fixedly connected to the periphery of the positioning center column, a rotating positioning hole which is rotationally connected with the rotating center column is formed in the rear end of the positioning center column, a surrounding rod is fixedly connected to the periphery of the rotating center column, a first positioning disc is fixedly connected to the periphery of the surrounding rod, a first spring is movably sleeved on the periphery of the surrounding rod, a first sliding hole is formed in the end face of the moving rod, the surrounding rod penetrates through the first sliding hole and is in sliding connection with the moving rod, a connecting rod which is in a circular array is fixedly connected to the bottom end of the moving rod, a driving block is fixedly connected to one end of the connecting rod, and a second sliding hole which is in sliding connection with the surrounding rod is formed in the end face of the driving block;
the utility model provides a circle subassembly, including the supporting shoe, the gear, the front clamp plate, the back clamp plate, preceding gyro wheel, the back gyro wheel, the catch bar, the installation curb plate of supporting shoe front end fixedly connected with, the rotation hole has been seted up to the installation curb plate side, the gear is located between the installation curb plate, gear both ends fixedly connected with and rotation hole rotation connection's rotation axis, the front clamp plate openly has seted up first rectangular hole with installation curb plate sliding connection's first rectangular hole, the front clamp plate openly is located installation curb plate below and has seted up first hole of stepping down, the first otic placode of front clamp plate bottom fixedly connected with, the last rack of front clamp plate rear fixedly connected with and gear engaged with, the second rectangular hole with installation curb plate sliding connection has been seted up on the back clamp plate openly, the back clamp plate openly is located the second rectangular hole and has been equipped with the second hole of stepping down, the preceding fixedly connected with rack of back clamp plate, preceding gyro wheel terminal surface fixedly connected with and first otic placode rotation connection's front axle, the back clamp plate terminal surface fixedly connected with and second otic placode rotation connection's rear axle, the catch bar rear clamp plate front and the catch bar rear side fixedly connected with, the second straight bar side of catch bar sliding connection has the second movable positioning spring week fixed connection.
Further, spacing subassembly includes erection column, the compression column, the bolt, the nut of symmetry setting, the through hole has been seted up to erection column week side, the communicating intubate hole of through hole has been seted up to erection column week side, erection column week side fixedly connected with connects the dead lever, it keeps away from erection column one end and back clamping ring back fixed connection to connect the dead lever, compression column passes through hole and erection column sliding connection, compression column week side has been seted up with the corresponding tight face of L type pole, the through hole that link up has been seted up to compression column terminal surface, the bolt passes through the through hole and nut threaded connection.
Further, the first spring top is connected with the bottom end of the surrounding rod in a contact mode, the bottom end of the first spring is connected with the top end of the second sliding hole in a contact mode, and the connecting rod is located on the outer side of the first positioning disc.
Further, one end of the second spring is in contact connection with the fixed straight rod, and the other end of the second spring is in contact connection with the pushing rod.
Further, the rear end of the fixed straight rod is fixedly connected with the periphery of the movable rod, and one end, far away from the installation side plate, of the supporting block is fixedly connected with the periphery of the rear roller.
Further, one end of the L-shaped rod, which is far away from the positioning center column, is inserted into the insertion hole and is in sliding connection with the mounting column.
Further, the front roller rolls in the first rolling track and the rear roller rolls in the second rolling track.
The beneficial effects of the invention are as follows: this kind of PTFE enhancement mode hollow fiber composite membrane, it is fixed to compress tightly through preceding clamping ring and back clamping ring with multilayer PTFE membrane combination formation enhancement composite structure, and the rethread fixed subassembly drives around the subassembly and encircles the clamping ring and evenly atress is fixed everywhere of clamping ring week side, prevents that the uneven damage that causes the membrane of atress from breaking, has replaced manual compressing tightly, causes the uneven phenomenon of atress and pollutes the composite membrane.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an exploded view of a partial structure of the present invention;
FIG. 3 is an exploded view of a partial structure of the present invention;
FIG. 4 is an exploded view of a partial structure of the present invention;
fig. 5 is an exploded view of a partial structure of the present invention.
In the figure: 1. a support assembly; 11. a front pressing ring; 111. a first scroll track; 12. a rear pressing ring; 121. a second rolling track; 2. a fixing assembly; 21. positioning a center column; 22. an L-shaped rod; 23. rotating the center column; 24. surrounding the rod; 241. a first positioning disk; 25. a first spring; 26. a moving rod; 261. a first sliding hole; 27. a connecting rod; 28. a driving block; 281. a second sliding hole; 3. a surround assembly; 31. a support block; 311. installing a side plate; 3111. a rotation hole; 32. a gear; 321. a rotation shaft; 33. a front platen; 331. a first rectangular hole; 332. a first relief hole; 333. a first ear plate; 334. a rack is arranged; 34. a rear pressing plate; 341. a second rectangular hole; 342. a second relief hole; 343. a second ear plate; 344. a lower rack; 35. a front roller; 351. a front axle; 36. a rear roller; 361. a rear axle; 37. a push rod; 371. a sliding jack; 38. fixing a straight rod; 381. a second positioning disk; 39. a second spring; 4. a limit component; 41. a mounting column; 411. a through hole; 412. an insertion hole; 42. connecting a fixed rod; 43. a compression column; 431. a tightening surface; 432. a through hole; 44. a bolt; 45. and (3) a nut.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "open," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like indicate orientation or positional relationships, merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The supporting component of the PTFE enhanced hollow fiber composite membrane is shown in fig. 1, a fixing component 2 is arranged behind the supporting component 1, a surrounding component 3 is arranged at the top end of the supporting component 1, and a limiting component 4 is arranged outside the fixing component 2.
As shown in fig. 2, the support assembly 1 includes a front pressing ring 11 and a rear pressing ring 12 disposed behind the front pressing ring 11, a first rolling track 111 is provided on a circumferential side of the front pressing ring 11, a locking protrusion is fixedly connected to a rear side of the front pressing ring 11, a locking groove connected to the locking protrusion in a locking manner is provided in front of the rear pressing ring 12, a second rolling track 121 is provided on a circumferential side of the rear pressing ring 12, a front roller 35 rolls in the first rolling track 111, and a rear roller 36 rolls in the second rolling track 121.
As shown in fig. 3, the fixing assembly 2 includes a positioning center column 21, a rotating center column 23, and a moving rod 26, wherein an L-shaped rod 22 is fixedly connected to the circumferential side of the positioning center column 21, a rotating positioning hole rotationally connected to the rotating center column 23 is provided at the rear end of the positioning center column 21, a surrounding rod 24 is fixedly connected to the circumferential side of the rotating center column 23, a first positioning plate 241 is fixedly connected to the circumferential side of the surrounding rod 24, a first spring 25 is movably sleeved around the circumferential side of the surrounding rod 24, a first sliding hole 261 is provided at the end surface of the moving rod 26, the surrounding rod 24 passes through the first sliding hole 261 and is slidably connected with the moving rod 26, a connecting rod 27 in a circular array is fixedly connected to the bottom end of the moving rod 26, a driving block 28 is fixedly connected to one end of the connecting rod 27, a second sliding hole 281 is provided at the end surface of the driving block 28 and is slidably connected to the bottom end of the surrounding rod 24, the bottom end of the first spring 25 is in contact connection with the top of the second sliding hole 281, and the connecting rod 27 is located outside the first positioning plate 241.
As shown in fig. 4, the encircling assembly 3 comprises a supporting block 31, a gear 32, a front pressing plate 33, a rear pressing plate 34, a front roller 35, a rear roller 36 and a push rod 37, wherein the front end of the supporting block 31 is fixedly connected with a mounting side plate 311, a rotation hole 3111 is formed in the side surface of the mounting side plate 311, the gear 32 is positioned between the mounting side plates 311, the two ends of the gear 32 are fixedly connected with a rotation shaft 321 which is rotationally connected with the rotation hole 3111, a first rectangular hole 331 which is slidingly connected with the mounting side plate 311 is formed in the front surface of the front pressing plate 33, a first yielding hole 332 is formed in the front surface of the front pressing plate 33 and is positioned below the mounting side plate 311, a first lug plate 333 is fixedly connected with the bottom end of the front pressing plate 33, an upper rack 334 which is fixedly connected with the gear 32, a second rectangular hole 341 which is slidingly connected with the mounting side plate 311 is fixedly connected with the front surface of the front pressing plate 34, a second lug plate 343 is fixedly connected with the front end surface of the rear pressing plate 33, a straight rod 39 is fixedly connected with the end surface of the push rod 38, a straight rod 37 is slidingly connected with the end surface of the push rod 38, and the end surface of the push rod 37 is fixedly connected with the end surface of the push rod 38, and the end of the push rod is fixedly connected with the push rod 37, and the end of the push rod is fixedly connected with the end of the push rod 38.
As shown in fig. 5, the limiting component 4 includes a mounting column 41, a symmetrically arranged compression column 43, a bolt 44, and a nut 45, the periphery of the mounting column 41 is provided with a through hole 411, the periphery of the mounting column 41 is provided with an insertion hole 412 communicated with the through hole 411, the periphery of the mounting column 41 is fixedly connected with a connecting fixing rod 42, one end of the connecting fixing rod 42 far away from the mounting column 41 is fixedly connected with the rear of the rear pressing ring 12, the compression column 43 is slidably connected with the mounting column 41 through the through hole 411, the periphery of the compression column 43 is provided with a supporting surface 431 corresponding to the L-shaped rod 22, the end face of the compression column 43 is provided with a through hole 432, the bolt 44 passes through the through hole 432 and is in threaded connection with the nut 45, and one end of the L-shaped rod 22 far away from the positioning center column 21 is inserted into the insertion hole 412 and slidably connected with the mounting column 41.
In the invention, a composite film is prevented from being arranged between a front pressing ring 11 and a rear pressing ring 12, the front pressing ring 11 and the rear pressing ring 12 are closed to enable the composite film to cover an intermediate ring surface, an L-shaped rod 22 is inserted into an insertion hole 412, a bolt 44 and a nut 45 are screwed, a pressing column 43 moves inwards to be tightly abutted against the periphery of the L-shaped rod 22, a fixed component 2 is fixedly connected with the rear pressing ring 12, a pushing rod 37 is pushed to move by the elasticity of a second spring 39, a pushing rod 37 pushes a rear pressing plate 34 to move, the rear pressing plate 34 moves towards a front roller 35, a lower rack 344 is meshed with a gear 32 to drive an upper rack 334 to move towards the rear pressing plate 34, the front pressing plate 33 is provided with the rear roller 36, the front roller 35 and the rear roller 36 are driven to be tightly clamped and connected with the front pressing ring 11 and the rear pressing ring 12 in a first rolling track 111 and a second rolling track 121, a rotating center column 23 is rotated, a moving rod 26 always has a force of rotating center column 23 to move towards the periphery of the pressing ring 12 under the action of the first spring 25, and the front pressing ring 26 can always move towards the periphery of the pressing ring 12 and be uniformly clamped and clamped by the pressing ring 12.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (1)
1. The supporting component of the PTFE enhanced hollow fiber composite membrane is characterized in that a fixing component (2) is arranged behind the supporting component (1), a surrounding component (3) is arranged at the top end of the supporting component (1), and a limiting component (4) is arranged outside the fixing component (2);
the support assembly (1) comprises a front pressing ring (11) and a rear pressing ring (12) arranged behind the front pressing ring (11), a first rolling track (111) is arranged on the periphery side of the front pressing ring (11), a clamping convex block is fixedly connected to the rear of the front pressing ring (11), a clamping groove which is in clamping connection with the clamping convex block is formed in the front of the rear pressing ring (12), and a second rolling track (121) is formed on the periphery side of the rear pressing ring (12);
the fixed assembly (2) comprises a positioning center column (21), a rotating center column (23) and a moving rod (26), wherein an L-shaped rod (22) is fixedly connected to the periphery of the positioning center column (21), a rotating positioning hole which is rotationally connected with the rotating center column (23) is formed in the rear end of the positioning center column (21), a surrounding rod (24) is fixedly connected to the periphery of the rotating center column (23), a first positioning disk (241) is fixedly connected to the periphery of the surrounding rod (24), a first spring (25) is movably sleeved on the periphery of the surrounding rod (24), a first sliding hole (261) is formed in the end face of the moving rod (26), the surrounding rod (24) penetrates through the first sliding hole (261) and is in sliding connection with the moving rod (26), a connecting rod (27) which is in a circular array is fixedly connected to the bottom end of the moving rod (26), a driving block (28) is fixedly connected to one end of the connecting rod (27), and a second sliding hole (281) which is in sliding connection with the surrounding rod (24) is formed in the end face of the driving block (28);
the surrounding assembly (3) comprises a supporting block (31), a gear (32), a front pressing plate (33), a rear pressing plate (34), a front roller (35), a rear roller (36) and a push rod (37), wherein the front end of the supporting block (31) is fixedly connected with a mounting side plate (311), a rotation hole (3111) is formed in the side surface of the mounting side plate (311), the gear (32) is positioned between the mounting side plates (311), two ends of the gear (32) are fixedly connected with a rotation shaft (321) rotationally connected with the rotation hole (3111), a first rectangular hole (331) which is in sliding connection with the mounting side plate (311) is formed in the front surface of the front pressing plate (33), a first yielding hole (332) is formed in the front surface of the front pressing plate (33) below the mounting side plate (311), a first ear plate (333) is fixedly connected with the bottom end of the front pressing plate (33), an upper rack (334) meshed with the gear (32) is fixedly connected with the front surface of the front pressing plate (34), a second rectangular hole (341) which is in sliding connection with the mounting side plate (311), a second rectangular hole (341) is formed in the front surface of the rear pressing plate (34), a second rectangular hole (341) is positioned above the second rectangular hole (311) and a second yielding hole (342), the end face of the front roller (35) is fixedly connected with a front wheel shaft (351) which is rotationally connected with a first lug plate (333), the end face of the rear roller (36) is fixedly connected with a rear wheel shaft (361) which is rotationally connected with a second lug plate (343), the front face of the push rod (37) is fixedly connected with the rear face of the rear pressing plate (34), the end face of the push rod (37) is provided with a sliding jack (371) which is in sliding connection with a fixed straight rod (38), the periphery of the fixed straight rod (38) is fixedly connected with a second positioning disc (381), and the periphery of the fixed straight rod (38) is movably sleeved with a second spring (39);
the limiting component (4) comprises a mounting column (41), a symmetrically arranged compression column (43), a bolt (44) and a nut (45), wherein a through hole (411) is formed in the periphery of the mounting column (41), an insertion hole (412) communicated with the through hole (411) is formed in the periphery of the mounting column (41), a connecting fixing rod (42) is fixedly connected to the periphery of the mounting column (41), one end, far away from the mounting column (41), of the connecting fixing rod (42) is fixedly connected with the rear face of the rear pressing ring (12), the compression column (43) is in sliding connection with the mounting column (41) through the through hole (411), a supporting surface (431) corresponding to the L-shaped rod (22) is formed in the periphery of the compression column (43), a through hole (432) is formed in the end face of the compression column (43), and the bolt (44) penetrates through the through hole (432) to be in threaded connection with the nut (45);
the top end of the first spring (25) is in contact connection with the bottom end of the surrounding rod (24), the bottom end of the first spring (25) is in contact connection with the top end of the second sliding hole (281), and the connecting rod (27) is positioned outside the first positioning disc (241);
one end of the second spring (39) is in contact connection with the fixed straight rod (38), and the other end of the second spring (39) is in contact connection with the pushing rod (37);
the rear end of the fixed straight rod (38) is fixedly connected with the periphery of the movable rod (26), and one end, far away from the mounting side plate (311), of the supporting block (31) is fixedly connected with the periphery of the rear roller (36);
one end of the L-shaped rod (22) far away from the positioning center column (21) is inserted into the insertion hole (412) and is in sliding connection with the mounting column (41);
the front roller (35) rolls in a first rolling track (111) and the rear roller (36) rolls in a second rolling track (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110968220.3A CN113546530B (en) | 2021-08-23 | 2021-08-23 | Supporting component of PTFE enhanced hollow fiber composite membrane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110968220.3A CN113546530B (en) | 2021-08-23 | 2021-08-23 | Supporting component of PTFE enhanced hollow fiber composite membrane |
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| CN113546530A CN113546530A (en) | 2021-10-26 |
| CN113546530B true CN113546530B (en) | 2023-07-25 |
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| JP4551581B2 (en) * | 2001-03-27 | 2010-09-29 | スター精密株式会社 | Speaker |
| CN202602879U (en) * | 2012-05-29 | 2012-12-12 | 昌邑市新达电声科技有限公司 | Diaphragm tightening device for producing electret microphone diaphragm |
| CN207010958U (en) * | 2017-08-02 | 2018-02-13 | 江苏华风电子有限公司 | A kind of taut film tool of adjustable diaphragm tensile force |
| CN111003255B (en) * | 2019-12-23 | 2021-08-17 | 戴志刚 | Surface film coating treatment device and method for formed ceramic tile |
| CN112123280A (en) * | 2020-10-12 | 2020-12-25 | 长春通视光电技术有限公司 | Adjustable thread pressing ring fastening mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021280A (en) * | 2019-03-12 | 2019-07-16 | 宁波座头鲸文化科技有限公司 | A kind of drum drum face structure of electronic percussion instrument |
| CN213501336U (en) * | 2020-09-12 | 2021-06-22 | 浙江立丰新材料科技有限公司 | Environment-friendly hot-pressing composite device for pasting and transferring direct-printing stained paper |
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