阅读说明：本技术 一种展平装置及涂布机 (Flattening device and coating machine ) 是由 李斌 吴晓明 章贵荣 杨国宏 陈桂华 何志强 彭炳文 岳水华 王超 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种展平装置及涂布机,涉及印刷设备技术领域,所述展平装置与涂布机的滚筒配合使用,所述展平装置包括撑杆及设于所述撑杆上的若干个吹风板,所述撑杆与所述滚筒平行设置,所述吹风板沿着所述撑杆的轴向间隔设置,所述吹风板朝向所述滚筒的一侧具有弧面部,所述吹风板的内部开设有导风腔,所述吹风板的表面设有进气孔,所述吹风板于所述弧面部上开设有若干出气孔,所述进气孔、所述出气孔均与所述导风腔连通,在气压作用下,气流自所述出气孔喷射出以使纸张紧贴所述滚筒。本发明能够解决现有涂布机中压纸板与纸张接触容易形成堆墨的技术问题。(The invention discloses a flattening device and a coating machine, and relates to the technical field of printing equipment, wherein the flattening device is matched with a roller of the coating machine for use, the flattening device comprises a support rod and a plurality of blowing plates arranged on the support rod, the support rod and the roller are arranged in parallel, the blowing plates are arranged at intervals along the axial direction of the support rod, one side of each blowing plate, facing the roller, is provided with an arc surface part, a wind guide cavity is formed in each blowing plate, the surface of each blowing plate is provided with a gas inlet hole, the arc surface parts of the blowing plates are provided with a plurality of gas outlet holes, the gas inlet holes and the gas outlet holes are communicated with the wind guide cavities, and under the action of air pressure, airflow is ejected from the gas outlet holes so as to enable paper to be tightly attached to the roller. The invention can solve the technical problem that ink piling is easily formed when the paperboard is contacted with paper in the existing coating machine.)

1. The utility model provides a flattening device, flattening device uses with the cylinder cooperation of coating machine which characterized in that: the flattening device comprises a supporting rod and a plurality of air blowing plates arranged on the supporting rod, the supporting rod and the roller are arranged in parallel, the air blowing plates are arranged along the axial direction of the supporting rod at intervals, arc-shaped portions are arranged on one sides, facing the roller, of the air blowing plates, air guide cavities are formed in the air blowing plates, air inlet holes are formed in the surfaces of the air blowing plates, a plurality of air outlet holes are formed in the arc-shaped portions of the air blowing plates, the air inlet holes and the air outlet holes are communicated with the air guide cavities, and under the action of air pressure, air flow is ejected from the air outlet holes so that paper can be tightly attached to the roller.

2. The flattening apparatus of claim 1, wherein: the flattening device further comprises a first guide structure, wherein the first guide structure is arranged at one end of the air blowing plate and used for guiding the head end of the paper into the space between the arc surface part and the roller.

3. The flattening apparatus of claim 2, wherein: the first guide structure is in a smooth transition shape and is arranged at the front end of the air blowing plate, and the first guide structure faces one side of the roller.

4. The flattening apparatus of claim 2, wherein: the flattening device further comprises a second guide structure, and the second guide structure is arranged at the other end of the air blowing plate and used for guiding out the tail end of the paper between the arc surface part and the roller.

5. The flattening apparatus of claim 4, wherein: the second guide structure comprises a paper pressing wheel, the paper pressing wheel is rotatably arranged on the air deflector, and paper is pressed on the surface of the roller through the paper pressing wheel.

6. The flattening apparatus of claim 5, wherein: the second guide structure further comprises a mounting bracket, and the paper pressing wheel is fixed on the air guide plate through the mounting bracket.

7. The flattening apparatus of claim 5, wherein: the clearance between the outer surface of the roller and the cambered surface part is larger than the clearance between the outer surface of the roller and the outer surface of the paper pressing wheel.

8. The flattening apparatus of any one of claims 1-7, wherein: the air blowing plate is characterized in that a mounting seat is arranged on the support rod, and the air blowing plate is fixed on the support rod through the mounting seat.

9. The flattening apparatus of claim 8, wherein: the two ends of the support rod are respectively provided with an adjustable connecting piece, and the support rod is fixed on the coating machine through the adjustable connecting pieces.

10. A coater, characterized in that: the coater comprises a roller and several sets of flattening devices according to any of claims 1-9.

Technical Field

The invention relates to the technical field of printing equipment, in particular to a flattening device and a coating machine.

Background

The bill surface on-line detection system of the double-side coating machine (SG15A type) in the existing code making part of the bill printing company uses a fixed platen mechanism as a paper flattening mechanism.

In the actual use process, because the paper is unstable in the advancing process, the paper pressing plate is inevitably contacted with the paper, so that ink piling is formed at the front end of the paper pressing plate, and the ticket surface online detection is greatly influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a flattening device and a coating machine, and aims to solve the technical problem that ink piling is easily formed when a paperboard is contacted with paper in the conventional coating machine.

The invention provides a flattening device, which is matched with a roller of a coating machine for use, and comprises a stay bar and a plurality of blowing plates arranged on the stay bar, wherein the stay bar is arranged in parallel with the roller, the blowing plates are arranged at intervals along the axial direction of the stay bar, one side of each blowing plate, which faces the roller, is provided with an arc surface part, a wind guide cavity is formed in each blowing plate, the surface of each blowing plate is provided with a gas inlet hole, the arc surface part of each blowing plate is provided with a plurality of gas outlet holes, the gas inlet holes and the gas outlet holes are communicated with the wind guide cavities, and under the action of air pressure, airflow is ejected from the gas outlet holes so that paper is tightly attached to the roller.

Compared with the prior art, the invention has the beneficial effects that: in the flattening device disclosed by the invention, the plurality of air blowing plates are arranged on the stay bar, the air inlet holes and the air outlet holes are formed in the air blowing plates, and air flow can be ejected at high speed through the air outlet holes under the action of air pressure, so that paper can move close to the roller.

According to one aspect of the above technical solution, the flattening device further includes a first guide structure, and the first guide structure is disposed at one end of the air blowing plate and used for guiding the head end of the paper between the arc surface portion and the drum.

According to one aspect of the above technical solution, the first guide structure is in a smooth transition shape and is disposed at a front end of the blowing plate, and the first guide structure faces one side of the drum.

According to one aspect of the above technical solution, the flattening device further includes a second guide structure, and the second guide structure is arranged at the other end of the blowing plate, so as to guide out the tail end of the paper between the arc surface portion and the drum.

According to one aspect of the above technical solution, the second guide structure includes a paper pressing wheel, the paper pressing wheel is rotatably disposed on the air guide plate, and the paper is pressed on the surface of the drum by the paper pressing wheel.

According to one aspect of the above technical solution, the second guide structure further includes a mounting bracket, and the paper pressing wheel is fixed to the air guide plate through the mounting bracket.

According to an aspect of the above technical solution, a gap between the outer surface of the drum and the arc portion is larger than a gap between the outer surface of the drum and the outer surface of the platen roller.

According to one aspect of the technical scheme, the stay bar is provided with the mounting seat, and the blowing plate is fixed on the stay bar through the mounting seat.

According to one aspect of the technical scheme, the two ends of the support rod are respectively provided with an adjustable connecting piece, and the support rod is fixed on the coating machine through the adjustable connecting pieces.

The second aspect of the present invention provides a coater, which includes a roller and the flattening device described in the above technical solution.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a first embodiment of a flattening apparatus cooperating with a roller;

FIG. 2 is a schematic structural diagram of a flattening device according to a first embodiment of the present invention;

FIG. 3 is a schematic view of a first embodiment of the present invention showing a blowing plate at a first viewing angle;

FIG. 4 is a schematic structural view of a blowing plate according to a first embodiment of the present invention from a second perspective;

the figure elements are illustrated in symbols:

the roller comprises a roller 10, a flattening device 20, a support rod 21, a blowing plate 22, an arc-shaped part 220, a first guide structure 221, a paper pressing wheel 222, a mounting bracket 223, an air inlet hole 224, an air outlet hole 225, a mounting seat 23 and an adjustable connecting piece 24.

Detailed Description

In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and not for purposes of indicating or implying that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, a first embodiment of the present invention provides a flattening device, where the flattening device 20 is used in cooperation with a drum 10 of a coater, and the drum 10 may be equipped with a plurality of flattening devices 20, and the flattening device 20 can tightly attach a running paper to an outer surface of the drum 10, so as to prevent the paper from contacting with the flattening device 20, thereby avoiding ink accumulation and effectively ensuring the on-line ticket surface detection procedure.

Specifically, as shown in fig. 2, the flattening device 20 includes a supporting rod 21 and a plurality of blowing plates 22 disposed on the supporting rod 21, the supporting rod 21 is disposed in parallel with the drum 10, the blowing plates 22 are disposed along an axial direction of the supporting rod 21 at intervals, a mounting seat 23 is disposed on the supporting rod 21, the blowing plates 22 are fixed on the supporting rod 21 through the mounting seat 23, when in specific application, the plurality of blowing plates 22 can be disposed along the axial direction of the supporting rod 21 at intervals, an arc surface portion 220 is disposed on one side of the blowing plate 22 facing the drum 10, a wind guiding cavity (not shown) is disposed inside the blowing plate 22, air inlet holes 224 are disposed on a surface of the blowing plate 22, the air inlet holes 224 on all the blowing plates 22 are connected in parallel to a high-pressure air source, a plurality of air outlet holes 225 are disposed on the blowing plate 22 above the arc surface portion 220, and an aperture of the air outlet holes 225 is small, the air outlet holes 225 are relatively densely arranged on the arc-shaped surface portion 220, the air inlet holes 224 and the air outlet holes 225 are both communicated with the air guide cavity, and under the action of air pressure, air flow is ejected from the air outlet holes 225 so that paper is tightly attached to the roller 10.

In the embodiment, through set up venthole 225 on blowing board 22, the air current outwards sprays on the paper surface through venthole 225, high velocity air can make the printing ink rapid-curing cutback on the paper, under the air current effect, will overcome the centrifugal force that applies for the paper when cylinder 10 rotates, the paper will hug closely in the surface of cylinder 10, under drive of drive mechanism, the paper will be attached to the surface of cylinder 10 and advance, paper and the board 22 of blowing between contactless, avoid the production of pile ink, effectively guarantee going on of ticket face on-line measuring procedure.

It should be noted here that the area of the sheet that, in terms of its direction of travel, enters first between the spreader 20 and cylinder 10 is the leading end of the sheet, and conversely, the area of the sheet that exits last between the spreader 20 and cylinder 10 is the trailing end of the sheet.

In order to ensure that the head end of the paper can smoothly enter between the arc portion 220 and the drum 10, as shown in fig. 3, the flattening device 20 further includes a first guiding structure 221, and the first guiding structure 221 is disposed at one end of the blowing plate 22, so as to guide the head end of the paper into between the arc portion 220 and the drum 10. Specifically, the first guide structure 221 is provided at the front end of the blowing plate 22 in a smooth transition shape, and the first guide structure 221 faces the drum 10.

That is, the gap between the first guiding structure 221 and the outer surface of the drum 10 is larger than the gap between the arc portion 220 and the outer surface of the drum 10, so that the head end of the paper can smoothly enter between the arc portion 220 of the blowing plate 22 and the drum 10, and the situation that the paper is not favorable for the paper to travel, such as paper collision, paper tearing and the like in the traveling process of the paper, is avoided.

In order to ensure that the tail end of the paper slips, please refer to fig. 3 and 4, the flattening device 20 further includes a second guiding structure, which is disposed at the other end of the blowing plate 22 and is used for guiding out the tail end of the paper between the arc-shaped surface portion 220 and the drum 10. Specifically, the second guiding structure includes a paper pressing wheel 222, the paper pressing wheel 222 is rotatably disposed on the air guide plate, the paper is pressed on the surface of the drum 10 by the paper pressing wheel 222, the paper pressing wheel 222 and the drum 10 move in opposite directions to guide out the tail end of the paper during the paper advancing process, and the tail end of the paper is not easy to swing during the paper advancing process under the condition that a certain extrusion force is given to the tail end of the paper.

Further, the second guiding structure further includes a mounting bracket 223, and the paper pressing wheel 222 is fixed on the air guiding plate through the mounting bracket 223. Wherein, the position of the paper pressing wheel 222 on the mounting bracket 223 can be adjusted according to the thickness of the paper, so that the pressing force of the paper pressing wheel 222 on the paper can be kept within a reasonable range. When the paper is thick, the gap between the platen roller 222 and the drum 10 can be increased to ensure that the thick paper can smoothly pass between the drum 10 and the platen roller 222. Conversely, when the sheet is thin, the gap between the platen roller 222 and the drum 10 can be reduced to ensure the pressing force of the platen roller 222 against the sheet.

It should be noted here that the adjustment stroke of the paper pressing wheel 222 should ensure that the gap between the outer surface of the roller 10 and the arc portion 220 is always larger than the gap between the outer surface of the roller 10 and the outer surface of the paper pressing wheel 222, so that the paper pressing wheel 222 can have a certain pressing force on the paper.

In some embodiments, the two ends of the stay bar 21 are respectively provided with an adjustable connecting piece 24, and the stay bar 21 is fixed on the coating machine through the adjustable connecting pieces 24. The adjustable connecting piece 24 can be movably fixed on the coating machine, or the stay bar 21 can be movably fixed on the adjustable connecting piece 24, as long as the position of the stay bar 21 can be adjusted in practical application, and meanwhile, the assembly is convenient.

The second embodiment of the present invention provides a coater including a roll 10 and the flattening device 20 described in the first embodiment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.