WO2011124086A1 - 无需助卷板的无芯纸卷复卷机 - Google Patents

无需助卷板的无芯纸卷复卷机 Download PDF

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Publication number
WO2011124086A1
WO2011124086A1 PCT/CN2011/000314 CN2011000314W WO2011124086A1 WO 2011124086 A1 WO2011124086 A1 WO 2011124086A1 CN 2011000314 W CN2011000314 W CN 2011000314W WO 2011124086 A1 WO2011124086 A1 WO 2011124086A1
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WO
WIPO (PCT)
Prior art keywords
rewinding
roll
suction
roller
roller body
Prior art date
Application number
PCT/CN2011/000314
Other languages
English (en)
French (fr)
Inventor
黎启标
罗兆波
Original Assignee
佛山市宝索机械制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=43336128&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2011124086(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 佛山市宝索机械制造有限公司 filed Critical 佛山市宝索机械制造有限公司
Priority to EP11765004.4A priority Critical patent/EP2559642B1/en
Priority to US13/640,473 priority patent/US9073717B2/en
Priority to ES11765004.4T priority patent/ES2632762T3/es
Publication of WO2011124086A1 publication Critical patent/WO2011124086A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/2276—The web roll being driven by a winding mechanism of the coreless type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/28—Attaching the leading end of the web to the replacement web-roll core or spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/41419—Starting winding process
    • B65H2301/41426—Starting winding process involving suction means, e.g. core with vacuum supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/33—Rotary suction means, e.g. roller, cylinder or drum
    • B65H2406/331—Rotary suction means, e.g. roller, cylinder or drum arranged for rotating while moving along material to be handled, e.g. rolling on material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/36—Means for producing, distributing or controlling suction
    • B65H2406/361—Means for producing, distributing or controlling suction distributing vacuum from stationary element to movable element
    • B65H2406/3612—Means for producing, distributing or controlling suction distributing vacuum from stationary element to movable element involving a shoe in sliding contact with flanges of a rotating element

Definitions

  • This invention relates to rewinders, and in particular to rewinders that can be used to produce coreless rolls. Background technique
  • a coreless roll is characterized by the absence of a reel in the middle of the roll.
  • Existing rewinders use a roll of support to complete the winding process when rewinding such rolls.
  • the patent number is
  • the nip between the upper roll and the lower roll must be changed during the process from the roll to the normal roll, resulting in a roll of paper
  • the initial force of the coil is unstable, which is easy to cause the rewinding failure.
  • the paper roll is supported by the auxiliary wrap. It is difficult to ensure uniform force on the paper roll, which is easy to cause the winding tightness of the core of the paper roll to be serious. Uniform (commonly known as "flower core”), which seriously affects the subsequent processing of the paper roll and the quality of the finished product; 3.
  • the lower roll moves while rotating at a high speed, and must precisely control the moving distance of the rewinding lower roll, which inevitably increases the mechanism Complexity and manufacturing cost; 4.
  • the front end of the auxiliary wrap needs to be made into a comb-tooth type, and the tooth end of the comb is inserted into the ring groove of the cylindrical surface of the rewinding roll, and the ring groove of the cylindrical surface of the rewinding roll is rewinded.
  • a significant indentation is exerted on the surface of the paper roll, which affects the appearance quality of the paper roll product.
  • the coreless roll rewinder without the roll assisting plate comprises a rewinding upper roll and a rewinding lower roll which are parallel to each other, the paper is wound on the rewinding upper roll and the rewinding and rewinding from the rewinding
  • the nip between the lower rolls passes, in particular, the nip between the rewinding upper roll and the rewinding lower roll is not more than 10 mm, and a plurality of air flow passages are distributed in the roll body of the rewinding lower roll, and the plurality of air flows
  • the channels are arranged along the circumferential direction of the roller body, each airflow channel is connected to a group of suction ports on the surface of the roller body, and a group of suction ports connected by the same airflow channel are arranged in one or more rows on the surface of the roller body.
  • Each row of suction ports is arranged along the length direction of the roller body, and the suction ports of each row are arranged along the circumferential direction of the roller body, and an air suction cover is arranged at a position close to the end of the rewinding roller, with the rewinding
  • the rotation of the lower roller when a certain suction port on the surface of the rewinding roller is far and near the nip between the rewinding upper roller and the rewinding lower roller, the airflow in the roller body through which the suction port is connected The passage is rotated to a region corresponding to the suction opening of the suction hood, when the rewinding roller
  • the air flow passage in the roller body connected to the suction port of the row is rotated to the air inlet of the suction hood Deviated area.
  • the winding principle of the present invention utilizes the suction force generated by the suction port on the surface of the rewinding roll near the nip between the rewinding roll and the rewinding roll to make the head of the paper roll up, and The rolled paper head is blocked by a narrow nip between the rewinding roll and the rewinding lower roll, so that the subsequently passed paper is rolled up between the rewinding roll and the rewinding roll The department continues to wind up and realize the roll.
  • the entire rewinding process of the present invention from the winding up to the rewinding does not need to rely on the support of the wrap, nor the nip between the rewinding and rewinding rolls, so the present invention has the following advantages:
  • the paper roll is stable and uniform during the rewinding process, and the reliability is high. 2.
  • the winding tightness of the core of the paper roll is uniform, avoiding the phenomenon of "flower core"; 3. It is not necessary to set the high speed of the rewinding roll.
  • Figure 1 is a schematic view showing the structure of an embodiment of the present invention
  • Figure 2 is a left side view of the rewinding roll of Figure 1;
  • Figure 3 is an example of another layout of the air flow passage in the roll body of the rewinding roll and the suction port on the surface of the roll body;
  • Figure 4 is a left side view of Figure 3;
  • Figure 5 shows another arrangement position of the suction hood
  • Figure 6 is a partial cross-sectional view taken along line A-A of Figure 5;
  • Figure 7 is a schematic view of the winding process of the embodiment shown in Figure 1;
  • FIG. 8 is a schematic structural view of another embodiment of the present invention.
  • the coreless roll rewinder of the present invention as shown in Fig. 1, comprises a rewind upper roll 1 and a rewind lower roll 2 which are parallel to each other.
  • the sheet 3 is wound on the rewind upper roll 1 and passes through a nip between the rewind upper roll 1 and the rewind lower roll 2.
  • the nip M between the rewinding upper roll 1 and the rewinding lower roll 2 is not more than 10 mm.
  • a plurality of air flow passages 4 parallel to the axis of the roller body are distributed in the roller body of the rewinding roller 2, and each of the airflow passages penetrates to the end surface of the roller body.
  • a plurality of air flow passages 4 are arranged at intervals along the circumferential direction of the roller body. Each of the air flow passages 4 communicates with a set of suction ports 5 on the surface of the roller body.
  • a group of suction ports 5 connected by the same air flow passage 4 are arranged in a row on the surface of the roller body.
  • a group of air inlets connected by the same air flow channel 4 are arranged in two rows of 5', 5".
  • a group of air suctions connected by the same airflow channel 4 The mouth can also be arranged in more rows.
  • each row of suction ports 5 are arranged along the length of the roller body 2, but it is not required that the direction of alignment must be parallel to the axis of the roller body, and may have a certain helix angle. As shown in Fig. 1, each of the rows of suction ports 5 are arranged at intervals along the circumferential direction of the roller body.
  • An air suction hood 6 is fixed to the end surface of the roller 2 which is approaching the rewinding.
  • the suction hood 6 is connected to a vacuuming device (not shown) to cause the suction hood 6 to generate a negative pressure.
  • the suction opening of the suction hood 6 faces the end surface of the rewinding roller 2.
  • each of the air flow passages 4 is in communication with and disconnected from the suction opening of the suction hood 6 in accordance with the rotation of the rewinding lower roller 2.
  • the air flow passage 4 in Fig. 1 can be connected to both end faces of the rewinding lower roll 2, or can be connected only to one end face of the rewinding lower roll 2; accordingly, the suction hood 6 can be disposed on the rewinding lower roll Both ends of 2 may be disposed only at one end of the rewinding lower roller 2.
  • the suction hood 6 can also be arranged as shown in Figs. 5 and 6 at a position close to the cylindrical surface of the rewinding roll 2 and near the end of the roll body.
  • the suction opening of the suction hood 6 faces the cylindrical surface of the roller body. Accordingly, the air flow passage 4 in the roller body communicates with the suction hood 6 on the cylindrical surface of the roller body as shown in Fig. 6.
  • the volume The paper head is obstructed at the nip between the rewinding upper roll 1 and the rewinding lower roll 2, and after a row of suction ports 5a originally communicating with the suction hood are separated from the nip, the The suction port 5a is disconnected from the suction opening of the suction hood 6 to lose the suction force, so that the rolled paper head can be blocked by the nip between the rewinding upper roll 1 and the rewinding lower roll 2, and then the subsequent pass The paper coming in continues to be wound up to achieve the roll.
  • the diameter of the paper roll is gradually increased, and then the rewinding upper roller 1, the rewinding lower roller 2, and the platen roller 7 are used to rotate the paper roll, and the paper at the end of the paper roll is broken after the rewinding is completed. , forming a new paper head.
  • FIG. 8 has a plurality of air flow passages 8 distributed in the roller body of the rewinding upper roller 1, and a plurality of air flow passages 8 are arranged at intervals along the circumferential direction of the roller body, each of which The air flow passage 8 communicates with a set of suction ports 9 on the surface of the roller body, and a group of suction ports 9 communicated by the same air flow passage 8 are arranged in one or more rows on the surface of the roller body, and each row of suction ports 9 is along The longitudinal direction of the roller bodies is arranged, and the suction ports 9 of the rows are arranged at intervals along the circumferential direction of the roller body, and the second suction hood 10 is disposed at a position close to the end of the upper roller of the rewinding, with the roll 1 of the upper roll Rotating, when a certain row of suction ports on the surface of the upper roll is rewinded, for example, a row of suction ports 9a in
  • FIG. 8 the improvement of FIG. 8 is to add an air flow passage 8, a suction port 9, and a second suction hood 10 to the rewinding upper roller 1 in the same manner as the rewinding lower roller 2. After this improvement, it can be more It is ensured that the rolled paper head can be blocked by the nip between the rewinding upper roll 1 and the rewinding lower roll 2, further improving the reliability of the unwinding.
  • the air inlet 9 and the second air suction hood 10, and the arrangement position of the second air hood 10 refer to the previous embodiment, and details are not described herein.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Winding Of Webs (AREA)

Description

无需助卷板的无芯纸卷复卷 技术领域
本发明涉及复卷机， 特别是可用于生产无芯纸卷的复卷机。 背景技术
无芯纸卷的特点是纸卷的中间没有卷轴。现有的复卷机在复卷这 类纸卷的时候借助一块助卷板来完成起卷过程。 例如专利号为
94101338.3、 名称为 "具有在卷绕过程中支持卷筒的表面， 用于带材 卷筒无芯卷绕的改进的重复卷绕机"的专利， 其所公开的复卷机在起 卷阶段将复卷上辊和复卷下辊 （此专利中称为 "卷绕滚轮 1、 3 ") 临 时靠拢在一起， 并且依靠一块助卷板（此专利中称为 "支持表面 21 ") 的支撑才能实现起卷，起卷后还需将复卷上辊和复卷下辊复位至正常 位置才能继续复卷。这种依赖助卷板起卷的复卷机存在以下问题： 1、 从起卷到正常复卷的过程中必须改变复卷上辊和复卷下辊之间的辊 隙， 导致纸卷在复卷的初期受力不稳定， 容易造成复卷失败； 2、 在 复卷的初期依靠助卷板支撑纸卷， 难以保证纸卷受力均匀， 易于导致 纸卷芯部的卷绕松紧度严重不均匀 （俗称 "花芯")， 严重影响纸卷的 后续加工和成品质量； 3、 复卷下辊一边高速旋转一边移动， 并且必 须精确控制复卷下辊的移动距离，这样必然增加了机构的复杂性和制 造成本； 4、 助卷板的前端需要做成梳齿型， 而且梳齿的齿端插入开 设在复卷下辊圆柱面的环槽内，而复卷下辊圆柱面的环槽会在纸卷的 表面压出明显的压痕， 影响纸卷产品的外观质量。 发明内容 本发明的目的是提供一种无需助卷板的无芯纸卷复卷机。
本发明是这样实现的：无需助卷板的无芯纸卷复卷机包括相互平 行的复卷上辊和复卷下辊，纸张绕在复卷上辊上并且从复卷上辊和复 卷下辊之间的辊隙中经过， 特别地， 复卷上辊和复卷下辊之间的辊隙 不大于 10毫米， 在复卷下辊的辊体内分布有多条气流通道， 多条气 流通道沿着辊体的圆周方向间隔排列，每一条气流通道连通至辊体表 面的一组吸气口，同一条气流通道所连通的一组吸气口在辊体表面排 列成一排或多排， 每一排吸气口沿着辊体的长度方向排列， 各排吸气 口沿着辊体的圆周方向间隔排列，在靠近复卷下辊端部的位置设置有 吸风罩， 随着复卷下辊的旋转， 当复卷下辊表面的某排吸气口由远及 近靠近复卷上辊和复卷下辊之间的辊隙时，该排吸气口所连通的辊体 内的气流通道转动至与吸风罩的吸风口对应连通的区域，当复卷下辊 表面的某排吸气口由近及远远离复卷上辊和复卷下辊之间的辊隙时， 该排吸气口所连通的辊体内的气流通道转动至与吸风罩的吸风口偏 离的区域。
本发明的起卷原理是利用复卷下辊表面的吸气口在由远及近靠 近复卷上辊和复卷下辊之间的辊隙时产生的吸力， 使纸张头部卷起， 并利用复卷上辊和复卷下辊之间的窄小辊隙阻挡卷起的纸张头部，使 后续传过来的纸张在复卷上辊和复卷下辊之间随着卷起的纸张头部 继续卷绕， 实现起卷。
本发明从起卷到复卷完毕的整个复卷过程都不需要依赖助卷板 的支撑， 也无需改变复卷上辊和复卷下辊之间的辊隙， 因此本发明具 有以下优点： 1、纸卷在复卷过程中受力稳定而且均匀，可靠性高； 2、 纸卷芯部的卷绕松紧度均匀， 避免产生 "花芯"现象； 3、 无需设置 令复卷下辊一边高速旋转一边移动的机构，有利于降低机构的复杂性 和制造成本； 4、 无需在复卷下辊的圆柱面上开设环槽， 不会在纸卷 的表面压出压痕， 提高了纸卷产品的外观质量。 附图说明
图 1是本发明的一种实施例的结构示意图；
图 2是图 1中的复卷下辊的左视图；
图 3 是复卷下辊的辊体内的气流通道以及辊体表面的吸气口的 另一种布局示例；
图 4是图 3的左视图；
图 5表示吸风罩的另一种布置位置；
图 6是图 5的 A-A局部剖视图；
图 7是图 1所示实施例的起卷过程示意图；
图 8是本发明的另一种实施例的结构示意图； 具体实施方式
本发明所述的无芯纸卷复卷机如图 1示，包括相互平行的复卷上 辊 1和复卷下辊 2。 纸张 3绕在复卷上辊 1上并且从复卷上辊 1和复 卷下辊 2之间的辊隙中经过。 复卷上辊 1和复卷下辊 2之间的辊隙 M 不大于 10毫米。 在复卷下辊 2的辊体内分布有多条平行于辊体轴线 的气流通道 4， 每条气流通道贯通至辊体的端面。 多条气流通道 4沿 着辊体的圆周方向间隔排列。每一条气流通道 4与辊体表面的一组吸 气口 5连通。 同时参见图 1、 图 2， 同一条气流通道 4所连通的一组 吸气口 5在辊体表面排列成一排。 或者也可以如图 3、 图 4那样， 同 一条气流通道 4所连通的一组吸气口排列成两排 5'、 5"。 以此类推， 同一条气流通道 4所连通的一组吸气口还可以排列成更多排。 如图 2 所示， 每一排吸气口 5沿着辊体 2的长度方向排列， 但并不要求排列 方向必须与辊体的轴线平行， 可以有一定的螺旋角。 如图 1所示， 各 排吸气口 5沿着辊体的圆周方向间隔排列。在逼近复卷下辊 2的端面 处固定有吸风罩 6。 吸风罩 6与抽真空设备 （图中未示出） 连接， 使 吸风罩 6产生负压。吸风罩 6的吸风口朝向复卷下辊 2的端面。随着 复卷下辊 2的旋转， 当复卷下辊 2表面的某排吸气口， 例如图 1中的 一排吸气口 5a， 由远及近靠近复卷上辊 1和复卷下辊 2之间的辊隙 时， 该排吸气口 5a所连通的辊体内的气流通道 4a转动至与吸风罩 6 的吸风口对应连通的区域， 使得整排吸气口 5a产生吸力； 当复卷下 辊 2表面的某排吸气口， 例如图 1中的一排吸气口 5b， 由近及远远 离复卷上辊 1和复卷下辊 2之间的辊隙时， 该排吸气口 5b所连通的 辊体内的气流通道 4b转动至与吸风罩 6的吸风口偏离的区域， 使得 整排吸气口 5b丧失吸力。 如此， 各条气流通道 4随着复卷下辊 2的 旋转轮流与吸风罩 6的吸风口连通和断开。
图 1中的气流通道 4既可以连通至复卷下辊 2的两个端面，也可 以只连通至复卷下辊 2的一个端面； 相应地， 吸风罩 6既可以布置在 复卷下辊 2的两端， 也可以只布置在复卷下辊 2的一端。
吸风罩 6也可以如图 5、 图 6所示布置在逼近复卷下辊 2的圆柱 面并且靠近辊体端部的位置处。 吸风罩 6 的吸风口朝向辊体的圆柱 面。相应地， 辊体内的气流通道 4如图 6所示在辊体的圆柱面与吸风 罩 6连通。
下面结合附图说明图 1所示实施例的起卷原理： 随着复卷下辊 2 的转动， 辊体表面的一排吸气口 5a与吸风罩 6的吸风口连通而产生 吸力， 将纸张 3的头部吸附在复卷下辊 2上； 复卷下辊 2随即将纸张 的头部往回带， 使纸张头部卷起， 形成图 7所示状态。 在图 7中， 卷 起的纸张头部在复卷上辊 1和复卷下辊 2之间的辊隙处受到阻碍，加 之原先与吸风罩连通的一排吸气口 5a由近及远离开辊隙后， 该排吸 气口 5a就与吸风罩 6的吸风口断开而丧失吸力， 使得卷起的纸张头 部能够被复卷上辊 1和复卷下辊 2之间的辊隙阻挡，于是后续传过来 的纸张继续卷绕， 实现起卷。
起卷后， 纸卷直径逐渐增大， 再由复卷上辊 1、 复卷下辊 2以及 压纸辊 7 —起夹着纸卷转动， 直至复卷完成后将纸卷尾部的纸张拉 断， 形成新的纸张头部。
作为本发明的改进方案，图 8所示的另一实施例在复卷上辊 1的 辊体内分布有多条气流通道 8， 多条气流通道 8沿着辊体的圆周方向 间隔排列， 每一条气流通道 8连通至辊体表面的一组吸气口 9， 同一 条气流通道 8所连通的一组吸气口 9在辊体表面排列成一排或多排， 每一排吸气口 9沿着辊体的长度方向排列，各排吸气口 9沿着辊体的 圆周方向间隔排列， 在靠近复卷上辊端部的位置设置有第二吸风罩 10， 随着复卷上辊 1的旋转， 当复卷上辊表面的某排吸气口， 例如图 8中的一排吸气口 9a， 由远及近靠近复卷上辊 1和复卷下辊 2之间的 辊隙时，该排吸气口 9a所连通的辊体内的气流通道 8a转动至与第二 吸风罩 10的吸风口对应连通的区域， 使得整排吸气口 9a产生吸力， 当复卷上辊表面的某排吸气口， 例如图 8中的一排吸气口 9b， 由近 及远远离复卷上辊 1和复卷下辊 2之间的辊隙时， 该排吸气口 9b所 连通的辊体内的气流通道 8b转动至与第二吸风罩 10的吸风口偏离的 区域。如此， 各条气流通道 8随着复卷上辊 1的旋转轮流与第二吸风 罩 10的吸风口连通和断开。
简而言之，图 8的改进之处就是为复卷上辊 1增设与复卷下辊 2类同 的气流通道 8、 吸气口 9以及第二吸风罩 10。如此改进后， 能够更可 靠地保证卷起的纸张头部能够被复卷上辊 1和复卷下辊 2之间的辊隙 阻挡， 进一步提高起卷的可靠性。 气流通道 8、 吸气口 9以及第二吸 风罩 10的结构和工作原理，以及第二吸风罩 10的布置位置可参考前 一实施例， 不再赘述。

Claims

权利要求书
1、 无需助卷板的无芯纸卷复卷机， 包括相互平行的复卷上辊和 复卷下辊，纸张绕在复卷上辊上并且从复卷上辊和复卷下辊之间的辊 隙中经过， 其特征是： 复卷上辊和复卷下辊之间的辊隙不大于 10毫 米， 在复卷下辊的辊体内分布有多条气流通道， 多条气流通道沿着辊 体的圆周方向间隔排列，每一条气流通道连通至辊体表面的一组吸气 口，同一条气流通道所连通的一组吸气口在辊体表面排列成一排或多 排， 每一排吸气口沿着辊体的长度方向排列， 各排吸气口沿着辊体的 圆周方向间隔排列， 在靠近复卷下辊端部的位置设置有吸风罩， 随着 复卷下辊的旋转，当复卷下辊表面的某排吸气口由远及近靠近复卷上 辊和复卷下辊之间的辊隙时，该排吸气口所连通的辊体内的气流通道 转动至与吸风罩的吸风口对应连通的区域，当复卷下辊表面的某排吸 气口由近及远远离复卷上辊和复卷下辊之间的辊隙时，该排吸气口所 连通的辊体内的气流通道转动至与吸风罩的吸风口偏离的区域。
2、 如权利要求 1所述的无需助卷板的无芯纸卷复卷机， 其特征 是： 在复卷上辊的辊体内分布有多条气流通道， 多条气流通道沿着辊 体的圆周方向间隔排列，每一条气流通道连通至辊体表面的一组吸气 口，同一条气流通道所连通的一组吸气口在辊体表面排列成一排或多 排， 每一排吸气口沿着辊体的长度方向排列， 各排吸气口沿着辊体的 圆周方向间隔排列， 在靠近复卷上辊端部的位置设置有第二吸风罩， 随着复卷上辊的旋转，当复卷上辊表面的某排吸气口由远及近靠近复 卷上辊和复卷下辊之间的辊隙时，该排吸气口所连通的辊体内的气流 通道转动至与第二吸风罩的吸风口对应连通的区域，当复卷上辊表面 的某排吸气口由近及远远离复卷上辊和复卷下辊之间的辊隙时，该排 吸气口所连通的辊体内的气流通道转动至与第二吸风罩的吸风口偏 离的区域。
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