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WO2014161283A1 - 多色印刷机的真空吸附系统 - Google Patents

多色印刷机的真空吸附系统 Download PDF

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Publication number
WO2014161283A1
WO2014161283A1 PCT/CN2013/084668 CN2013084668W WO2014161283A1 WO 2014161283 A1 WO2014161283 A1 WO 2014161283A1 CN 2013084668 W CN2013084668 W CN 2013084668W WO 2014161283 A1 WO2014161283 A1 WO 2014161283A1
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opening
valve
vacuum adsorption
cam
vacuum
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French (fr)
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邱耀光
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B41F15/18—Supports for workpieces
    • B41F15/20—Supports for workpieces with suction-operated elements

Definitions

  • the present invention relates to the field of printing equipment, and more particularly to a vacuum adsorption system for a multicolor printer.
  • the vacuum substrate is usually used to fix the single-sheet substrate, that is, the substrate is placed on the platform station to be printed, and the vacuum-adsorbing substrate is used to fix the substrate, thereby preventing the substrate from being printed during the printing process. move.
  • a fixedly disposed vacuum pump is connected to a vacuum suction stage of a multicolor printing press through a pipe.
  • the printing platform needs a long distance movement, which is a non-linear reciprocating motion, and the vacuum adsorption of the vacuum adsorption table needs to be continuous, that is, from loading to printing. , including multiple print drying, until the material is cut, the entire dynamic process needs to maintain the vacuum adsorption state of the substrate without interruption.
  • the vacuum adsorption system is difficult to maintain the vacuum adsorption state of the substrate without interruption.
  • the technical problem to be solved by the present invention is that in the above-mentioned multi-color printing machine of the prior art, in the printing process, it is difficult for the vacuum adsorption system to continuously maintain the vacuum adsorption state defect of the substrate, and provide a kind of printing process which can The vacuum adsorption system of the multicolor printer that maintains the vacuum adsorption state of the substrate.
  • the technical solution adopted by the present invention to solve the technical problem thereof is to construct a vacuum adsorption system of a multicolor printing press, comprising a rotating wheel, a conveyor belt surrounding the rotating wheel, and a plurality of mounting on the conveyor belt for adsorption a vacuum adsorption stage of the substrate, a pipe connecting the plurality of vacuum adsorption stages, and a vacuum pump;
  • the pipe is a circulating pipe that communicates end to end, and the pipe surrounds the conveyor belt;
  • the vacuum adsorption system further includes installation At least two opening and closing devices on one end face of the rotating wheel, a plurality of first valves uniformly mounted on the conveyor belt and connected to the pipe, and a multi-channel rotary joint; wherein each of the opening and closing devices Connecting to the vacuum pump through the multi-channel rotary joint;
  • the distance between two adjacent first valves along the conveyor belt is equal to the distance between two adjacent opening and closing devices along the circumference of the rotating wheel;
  • At least one of the opening and closing devices pushes a spool of the first valve corresponding thereto such that a passage for gas communication is formed therebetween, thereby allowing the vacuum pump to communicate with the vacuum suction stage.
  • the vacuum adsorption system further includes a cam
  • a protruding portion of the cam is adjacent to a side of the rotating wheel contacting the conveyor belt; at least one of the opening and closing devices is in sliding contact with the protruding portion of the cam;
  • the opening and closing device in sliding contact with the protruding portion of the cam may push a spool of the first valve such that a passage for gas circulation is formed between the opening and closing device and the first valve;
  • the opening and closing device when the non-protrusion portion of the cam is in sliding contact is in a closed state.
  • the vacuum adsorption system further includes a fixed shaft; the rotating wheel is rotatably mounted on the fixed shaft; the cam is fixedly mounted on the fixed On the shaft.
  • the opening and closing device includes a second valve connected to the vacuum pump and fixedly mounted on one end surface of the rotating wheel, and a second valve a movable rod connected to the spool; the movable rod is slidably contactable with the cam and controls the second valve to open or close;
  • the opening and closing device further includes an elastic returning member; the movable end of the elastic returning member is coupled to the movable rod, and the elastic returning member is fixed The end is connected to the rotating wheel.
  • the elastic return member is a spring.
  • the movable rod pushes one end of the valve body of the first valve with a seal.
  • a bearing is mounted at one end of the movable lever in sliding contact with the cam.
  • the rotating wheel is a sprocket;
  • the conveyor belt is a chain that meshes with the sprocket.
  • the vacuum adsorption system of the multicolor printing machine embodying the invention has the following beneficial effects: the vacuum adsorption system of the multicolor printing machine adopts the structure of the opening and closing device and the first valve, and the multicolor printing machine can be in the printing process, and the vacuum adsorption system can A continuous vacuum adsorption state of the substrate is achieved.
  • FIG. 1 is a schematic structural view of a vacuum adsorption system of a multicolor printing press according to a preferred embodiment of the present invention
  • Fig. 2 is a schematic view showing the structure of the movable rod in contact with the cam in the vacuum adsorption system of the multicolor printing press shown in Fig. 1.
  • a preferred embodiment of the present invention provides a vacuum adsorption system for a multicolor printer comprising a rotating wheel 1, a conveyor belt 2, a opening and closing device 3, a first valve 4, and a vacuum suction station. (not shown), piping (not shown), vacuum pump (not shown), and multi-channel swivel joints.
  • the conveyor belt 2 is wound around the rotating wheel 1 and can be synchronized with the rotating wheel 1.
  • a plurality of vacuum adsorption stages are provided, and each vacuum adsorption stage is uniformly mounted on the conveyor belt 2.
  • Multi-color presses Vacuum printing stations can be used to adsorb substrates during printing operations.
  • Each vacuum adsorption stage is connected by a pipe.
  • the pipe is a circulating pipe that communicates end to end, and the pipe is wound around the conveyor belt 2 and can move synchronously with the belt 2.
  • the first valve 4 is provided in plurality, which are uniformly mounted on the conveyor belt 2, and each of the first valves 4 is connected to the pipe, respectively. It can be understood that as long as one of the plurality of first valves 4 is connected to the vacuum pump, the vacuum pump is connected to the vacuum adsorption stage, and the vacuum adsorption stage can be used to adsorb the substrate.
  • At least two opening and closing devices 3 are provided, which are evenly mounted on one end face of the rotating wheel 1, and the opening and closing device 3 is capable of moving as the rotating wheel 1 rotates.
  • Each opening and closing device 3 is connected to a vacuum pump, respectively.
  • each of the opening and closing devices 3 is connected to a vacuum pump through a multi-channel rotary joint.
  • the multi-channel rotary joint employs a multi-channel rotary joint that is common in the prior art, and the number of joints matches the number of opening and closing devices 3.
  • Each of the opening and closing devices 3 is connected to the vacuum pump through a multi-channel rotary joint, and since the joint connected to each of the opening and closing devices 3 can be kept connected to the vacuum pump during the rotation, when the vacuum pump is fixedly disposed, the opening and closing device 3 can be rotated during the rotation. Keep the connection to the vacuum pump.
  • the positional relationship between the first valve 4 and the opening and closing device 3 is such that the distance between the adjacent two first valves 4 along the conveyor belt 2 is equal to the distance between the adjacent two opening and closing devices 3 along the circumference of the rotating wheel 1.
  • the opening and closing device 3 can be brought into contact with the first valve 4 during the movement of the rotating wheel 1 and the conveyor belt 2.
  • the at least one opening and closing device 3 can push the valve core of the first valve 4 corresponding thereto, so that the opening and closing device 3 and the first valve 4 form a passage for gas circulation. . Since the vacuum pump is connected to the opening and closing device 3, at this time, the vacuum pump is sequentially connected to the vacuum adsorption stage through the opening and closing device 3, the first valve 4, and the vacuum adsorption stage can keep the vacuum adsorption stage in a state of adsorbing the substrate.
  • the vacuum adsorption system further includes a cam 5 and a fixed shaft 6.
  • the rotary wheel 1 is rotatably mounted on a fixed shaft 6, and the cam 5 is fixedly mounted on the fixed shaft 6. It can be understood that the cam 5 does not rotate as the rotating wheel 1 rotates.
  • the projection of the cam 5 is adjacent to the side of the contact portion of the rotating wheel 1 with the conveyor belt 2. Accordingly, the non-protrusion portion of the cam 5 is located on the side of the non-contact portion of the rotating wheel 1 and the conveyor belt 2.
  • at least one of the opening and closing devices 3 is in sliding contact with the projection of the cam 5.
  • the curvature of the convex portion of the cam 5 is equal, the curvature of the non-contact portion is also equal, and the convex portion and the non-protrusion portion smoothly transition to ensure smoothness when the opening and closing device 3 is in sliding contact with the cam 5.
  • Sex. It can be understood that the cam 5 can be replaced by a concave wheel as long as the convex portion of the concave wheel is close to the side of the contact portion of the rotating wheel 1 and the conveyor belt 2. In other embodiments, the cam 5 may have other alternative configurations.
  • the opening and closing device 3 When one end of the opening and closing device 3 is in sliding contact with the protruding portion of the cam 5, the other end of the first valve 4 pushes the valve body of the first valve 4 to form a passage for the gas to flow between the opening and closing device 3 and the first valve 4, and the vacuum pump operates.
  • the vacuum adsorption stage can be kept in a state of adsorbing the substrate.
  • the rotating wheel 1 is a sprocket.
  • the conveyor belt 2 is a chain that is meshed with the sprocket.
  • the chain drive has the advantages of accurate transmission ratio and reliable operation.
  • the opening and closing device 3 includes a second valve 31, a movable rod 32, and an elastic returning member (not shown).
  • the second valve 31 is connected to the vacuum pump and fixedly mounted on the end surface of the rotating wheel 1.
  • the movable lever 32 is coupled to the spool of the second valve 31.
  • the multi-color printing press can be in sliding contact with the cam 5 during the printing operation and control the second valve 31 to open or close.
  • the resilient return member is a spring. It can be understood that the elastic reset member can also adopt other structures that can realize automatic reset.
  • the opening and closing device 3 is provided with eight, which are uniformly mounted on the end faces of the rotating wheel 1.
  • the number of the first valves 4 is designed according to the size of the conveyor belt 2, and the distance between the adjacent two first valves 4 along the conveyor belt 2 is equal to the distance between the adjacent two opening and closing devices 3 along the circumference of the rotating wheel 1. .
  • the movable lever 32 drives the second valve 31 under the action of the cam 5.
  • the spool moves so that the second valve 31 is opened, at the same time, the movable rod 32 pushes the spool of the first valve 4, so that a passage for the gas to flow is formed between the first valve 4 and the second valve 31.
  • the vacuum pump sequentially communicates with the vacuum adsorption stage through the second valve 31 and the first valve 4, and the vacuum adsorption stage can keep the vacuum adsorption stage in a state of adsorbing the substrate.
  • the opening and closing device 3 When the opening and closing device 3 is rotated from the protruding portion of the cam 5 to the non-protruding portion of the cam 5, the movable lever 32 is disengaged from the first valve 4 by the elastic returning member. At this time, the first valve 4 The spool and the spool of the second valve 31 are automatically reset to remain closed.
  • the opening and closing device 3 comes into contact with the projection of the cam 5, the opening and closing device 3 comes into contact with the other first valve 4, thereby reciprocatingly circulating.
  • at least one opening and closing device 3 communicates with the first valve 4, so that the vacuum pump can communicate with the vacuum adsorption stage to ensure that the vacuum adsorption stage adsorbs the state of the substrate.
  • the number of the opening and closing devices 3 can also have other options.
  • the movable rod 32 pushes the end of the valve body of the first valve 4 with the sealing member 33.
  • the sealing performance when the first valve 4 and the second valve 31 are in communication can be improved.
  • the bearing 34 is attached to one end of the movable lever 32 in sliding contact with the cam 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Screen Printers (AREA)

Abstract

一种多色印刷机的真空吸附系统包括转动轮（1）、传送带（2）、若干个真空吸附台、连接若干个真空吸附台的管道、真空泵、安装在转动轮端面的至少两个开合装置（3）、多个安装在传送带上并与管道连接的第一阀（4）、以及多通道旋转接头。每个开合装置分别通过多通道旋转接头与真空泵连接；至少一个开合装置可推动与其相对应的第一阀的阀芯，使得该开合装置与该第一阀之间形成供气体流通的通道，进而使真空泵与真空吸附台实现连通。采用开合装置与第一阀等结构，真空吸附系统能够在多色印刷机的印刷过程中实现对承印物保持连续的真空吸附状态。

Description

多色印刷机的真空吸附系统 技术领域
本发明涉及印刷设备技术领域，更具体地说，涉及一种多色印刷机的真空吸附系统。
背景技术
在网版印刷过程中，对单片承印物的固定通常采用真空吸附台，即将承印物放置在需印刷的平台工位上，利用真空吸附承印物使其固定，在印刷过程中防止承印物窜动。
现有技术的多色印刷机，固定设置的真空泵通过管路与多色印刷机的真空吸附台连接。在多色印刷过程中，印刷平台需较长距离运动，该运动为非直线型的循环往复运动，且真空吸附台对承印物的真空吸附需要是连续性的，即从上料到多次印刷，其中包括多次印品干燥，直至下料，整个动态过程均需要不间断地对承印物保持真空吸附状态。而现有的多色印刷机在印刷过程中，真空吸附系统难以实现不间断地对承印物保持真空吸附状态。
发明内容
本发明要解决的技术问题在于，针对现有技术的上述多色印刷机在印刷过程中，真空吸附系统难以实现不间断地对承印物保持真空吸附状态缺陷，提供一种在印刷过程中能够对承印物保持真空吸附状态的多色印刷机的真空吸附系统。
本发明解决其技术问题所采用的技术方案是：构造一种多色印刷机的真空吸附系统，包括转动轮、环绕在所述转动轮上的传送带、若干个安装在所述传送带上并用于吸附承印物的真空吸附台、连接所述若干个真空吸附台的管道、以及真空泵；所述管道为首尾相通的循环管道，且所述管道环绕在所述传送带上；所述真空吸附系统还包括安装在所述转动轮一端面的至少两个开合装置、多个均匀安装在所述传送带上并与所述管道连接的第一阀、以及多通道旋转接头；其中，每个所述开合装置分别通过所述多通道旋转接头与所述真空泵连接；
相邻两个所述第一阀沿所述传送带之间的距离与相邻两个所述开合装置沿所述转动轮圆周之间的距离相等；
至少一个所述开合装置推动与其相对应的第一阀的阀芯使得两者之间形成供气体流通的通道，进而使所述真空泵与所述真空吸附台实现连通。
在本发明所述的多色印刷机的真空吸附系统中，所述真空吸附系统还包括凸轮；
所述凸轮的凸出部靠近所述转动轮与所述传送带接触部位的一侧；至少一个所述开合装置与所述凸轮的凸出部滑动接触；
与所述凸轮的凸出部滑动接触时的所述开合装置可推动所述第一阀的阀芯，使得所述开合装置与所述第一阀之间形成供气体流通的通道；与所述凸轮的非凸出部滑动接触时的所述开合装置处于关闭状态。
在本发明所述的多色印刷机的真空吸附系统中，所述真空吸附系统还包括固定轴；所述转动轮可转动地安装在所述固定轴上；所述凸轮固定安装在所述固定轴上。
在本发明所述的多色印刷机的真空吸附系统中，所述开合装置包括与所述真空泵连接并固定安装在所述转动轮一端面的第二阀、以及与所述第二阀的阀芯连接的活动杆；所述活动杆可与所述凸轮滑动接触，并控制所述第二阀打开或关闭；
所述活动杆的一端与所述凸轮的凸出部滑动接触时，所述活动杆的另一端推动所述第一阀的阀芯使得所述第二阀与所述第一阀之间形成供气体流通的通道。
在本发明所述的多色印刷机的真空吸附系统中，所述开合装置还包括弹性复位件；所述弹性复位件的活动端与所述活动杆连接，且所述弹性复位件的固定端与所述转动轮连接。
在本发明所述的多色印刷机的真空吸附系统中，所述弹性复位件为弹簧。
在本发明所述的多色印刷机的真空吸附系统中，所述活动杆推动所述第一阀的阀芯的一端安装有密封件。
在本发明所述的多色印刷机的真空吸附系统中，所述活动杆与所述凸轮滑动接触的一端安装有轴承。
在本发明所述的多色印刷机的真空吸附系统中，所述转动轮为链轮；所述传送带为与所述链轮啮合传动的链条。
实施本发明的多色印刷机的真空吸附系统，具有以下有益效果：多色印刷机的真空吸附系统采用开合装置与第一阀等结构，多色印刷机在印刷过程中，真空吸附系统能够实现对承印物保持连续的真空吸附状态。
附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明较佳实施例提供的多色印刷机的真空吸附系统的结构示意图；
图2是图1所示的多色印刷机的真空吸附系统中的活动杆与凸轮接触时的结构示意图。
具体实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
如图1、图2所示，本发明的较佳实施例提供一种多色印刷机的真空吸附系统，其包括转动轮1、传送带2、开合装置3、第一阀4、真空吸附台（图未示）、管道（图未示）、真空泵（图未示）、以及多通道旋转接头。传送带2环绕在转动轮1上，可与该转动轮1实现同步传动。真空吸附台设置有若干个，每个真空吸附台均匀地安装在传送带2上。多色印刷机在印刷工作过程中，真空吸附台可用于吸附承印物。可根据多色印刷机的印刷色数，选择不同数量的真空吸附台。每个真空吸附台通过管道进行连接。该管道为首尾相通的循环管道，且该管道环绕在传送带2上，可与传动带2同步运动。第一阀4设置有多个，其均匀地安装在传送带2上，每个第一阀4分别与该管道连接。可以理解的是，多个第一阀4中只要有一个第一阀4与真空泵连接，即使得真空泵与真空吸附台实现连通，可实现真空吸附台吸附承印物。
开合装置3至少设置有两个，其均匀地安装在转动轮1的一端面，该开合装置3并能够随着转动轮1的转动而产生运动。每个开合装置3分别与真空泵连接。该实施例中，每个开合装置3分别通过多通道旋转接头与真空泵连接。多通道旋转接头采用现有技术中常见的多通道旋转接头，其接头数量与开合装置3的数量相匹配。每个开合装置3通过多通道旋转接头与真空泵连接，由于与每个开合装置3连接的接头可在旋转过程中保持与真空泵连接，真空泵固定设置时，开合装置3在转动过程中能够保持与真空泵的连接。
第一阀4与开合装置3的位置关系为：相邻两个第一阀4沿传送带2之间的距离与相邻两个开合装置3沿转动轮1圆周之间的距离相等。通过此位置关系以保证转动轮1和传送带2在运动过程中，开合装置3能够与第一阀4相接触。
多色印刷机在印刷工作过程中，至少一个开合装置3可推动与其相对应的第一阀4的阀芯，使得该开合装置3与该第一阀4之间形成供气体流通的通道。由于真空泵与开合装置3连接，此时，真空泵依次通过开合装置3、第一阀4与真空吸附台实现连通，真空泵运作时即可使真空吸附台保持吸附承印物的状态。
具体地，所述真空吸附系统还包括凸轮5、以及固定轴6。转动轮1可转动地安装在固定轴6上，凸轮5固定安装在固定轴6上。可以理解的是，凸轮5不会随着转动轮1的转动而产生转动。该凸轮5的凸出部靠近转动轮1与传送带2接触部位的一侧，相应地，凸轮5的非凸出部位于转动轮1与传送带2非接触部位的一侧。在运动过程中，至少一个开合装置3与凸轮5的凸出部滑动接触。该实施例中，凸轮5的凸出部的曲率相等，非接触部位的曲率同样相等，凸出部与非凸出部平滑地进行过渡，以保证开合装置3与凸轮5滑动接触时的平稳性。可以理解的是，该凸轮5可以采用凹轮进行替换，只要满足该凹轮的凸出部靠近转动轮1与传送带2接触部位的一侧即可。其它实施例中，凸轮5亦可有其它的替代结构。
开合装置3的一端与凸轮5的凸出部滑动接触时，其另一端推动第一阀4的阀芯使得开合装置3与第一阀4之间形成供气体流通的通道，真空泵运作时即可使真空吸附台保持吸附承印物的状态。开合装置3与凸轮5的非凸出部滑动接触时，开合装置3与第一阀4脱离接触，开合装置3处于关闭状态，以保证真空泵的正常运作。
进一步地，本实施例中，转动轮1为链轮。传送带2为与该链轮啮合传动的链条。采用链传动具有传动比准确、工作可靠等优点。
开合装置3包括第二阀31、活动杆32、以及弹性复位件（图未示）。第二阀31与真空泵连接并固定安装在转动轮1端面。活动杆32与第二阀31的阀芯连接。多色印刷机在印刷工作过程中，活动杆32可与凸轮5滑动接触，并控制第二阀31打开或关闭。活动杆32的一端与凸轮5的凸出部滑动接触时，活动杆32的另一端推动第一阀4的阀芯。弹性复位件的固定端与转动轮1连接，且弹性复位件的活动端与活动杆32连接。该实施例中，弹性复位件为弹簧。可以理解的是，弹性复位件亦可采用其它可实现自动复位的结构。
本实施例中，开合装置3设置有八个，其均匀地安装在转动轮1的端面。第一阀4的数量根据传送带2的尺寸进行设计，且保证相邻两个第一阀4沿传送带2之间的距离与相邻两个开合装置3沿转动轮1圆周之间的距离相等。
多色印刷机在印刷工作过程中，当某个开合装置3从凸轮5的非凸出部转动到凸轮5的凸出部时，活动杆32在凸轮5的作用下带动第二阀31的阀芯运动，使得第二阀31打开，与此同时，活动杆32推动第一阀4的阀芯，使得第一阀4与第二阀31之间形成供气体流通的通道。此时，真空泵依次通过第二阀31、第一阀4与真空吸附台实现连通，真空泵运作时即可使真空吸附台保持吸附承印物的状态。当该开合装置3从凸轮5的凸出部转动到凸轮5的非凸出部时，在弹性复位件的作用下，活动杆32与第一阀4脱离接触，此时，第一阀4的阀芯与第二阀31的阀芯自动复位以保持关闭状态。当开合装置3再与凸轮5的凸出部接触时，开合装置3与另一个第一阀4接触，以此往复循环。在该印刷工作过程中，至少有一个开合装置3与第一阀4相连通，使得真空泵可与真空吸附台相连通，以保证真空吸附台吸附承印物的状态。可以理解的是，开合装置3的数量亦可有其它选择，开合装置3的数量越多时，与第一阀4相连通的开合装置3的数量也越多，真空吸附台的吸附承印物的稳定性越高。
本实施例中，为了提高第一阀4与第二阀31相连通时的密封性能，活动杆32推动第一阀4的阀芯的一端安装有密封件33。通过设置密封件33的结构，可以提高第一阀4与第二阀31相连通时的密封性能。
本实施例中，为了减小活动杆32与凸轮5滑动接触时运动阻力，活动杆32与凸轮5滑动接触的一端安装有轴承34。通过设置轴承34的结构，使得活动杆32与凸轮5滑动接触的滑动接触时摩擦力小，运动更加顺畅。
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护之内。

Claims (9)

  1. 一种多色印刷机的真空吸附系统，包括转动轮（1）、环绕在所述转动轮（1）上的传送带（2）、若干个安装在所述传送带（2）上并用于吸附承印物的真空吸附台、连接所述若干个真空吸附台的管道、以及真空泵；其特征在于，所述管道为首尾相通的循环管道，且所述管道环绕在所述传送带（2）上；所述真空吸附系统还包括安装在所述转动轮（1）一端面的至少两个开合装置（3）、多个均匀安装在所述传送带（2）上并与所述管道连接的第一阀（4）、以及多通道旋转接头；其中，每个所述开合装置（3）分别通过所述多通道旋转接头与所述真空泵连接；
    相邻两个所述第一阀（4）沿所述传送带（2）之间的距离与相邻两个所述开合装置（3）沿所述转动轮（1）圆周之间的距离相等；
    至少一个所述开合装置（3）推动与其相对应的第一阀（4）的阀芯使得两者之间形成供气体流通的通道，进而使所述真空泵与所述真空吸附台实现连通。
  2. 根据权利要求1所述的多色印刷机的真空吸附系统，其特征在于，所述真空吸附系统还包括凸轮（5）；
    所述凸轮（5）的凸出部靠近所述转动轮（1）与所述传送带（2）接触部位的一侧；至少一个所述开合装置（3）与所述凸轮（5）的凸出部滑动接触；
    与所述凸轮（5）的凸出部滑动接触时的所述开合装置（3）可推动所述第一阀（4）的阀芯，使得所述开合装置（3）与所述第一阀（4）之间形成供气体流通的通道；与所述凸轮（5）的非凸出部滑动接触时的所述开合装置（3）处于关闭状态。
  3. 根据权利要求2所述的多色印刷机的真空吸附系统，其特征在于，所述真空吸附系统还包括固定轴（6）；所述转动轮（1）可转动地安装在所述固定轴（6）上；所述凸轮（5）固定安装在所述固定轴（6）上。
  4. 根据权利要求2所述的多色印刷机的真空吸附系统，其特征在于，所述开合装置（3）包括与所述真空泵连接并固定安装在所述转动轮（1）一端面的第二阀（31）、以及与所述第二阀（31）的阀芯连接的活动杆（32）；所述活动杆（32）可与所述凸轮（5）滑动接触，并控制所述第二阀（31）打开或关闭；
    所述活动杆（32）的一端与所述凸轮（5）的凸出部滑动接触时，所述活动杆（32）的另一端推动所述第一阀（4）的阀芯使得所述第二阀（31）与所述第一阀（4）之间形成供气体流通的通道。
  5. 根据权利要求4所述的多色印刷机的真空吸附系统，其特征在于，所述开合装置（3）还包括弹性复位件；所述弹性复位件的活动端与所述活动杆（32）连接，且所述弹性复位件的固定端与所述转动轮（1）连接。
  6. 根据权利要求5所述的多色印刷机的真空吸附系统，其特征在于，所述弹性复位件为弹簧。
  7. 根据权利要求4所述的多色印刷机的真空吸附系统，其特征在于，所述活动杆（32）推动所述第一阀（4）的阀芯的一端安装有密封件（33）。
  8. 根据权利要求4所述的多色印刷机的真空吸附系统，其特征在于，所述活动杆（32）与所述凸轮（5）滑动接触的一端安装有轴承（34）。
  9. 根据权利要求1所述的多色印刷机的真空吸附系统，其特征在于，所述转动轮（1）为链轮；所述传送带（2）为与所述链轮啮合传动的链条。
PCT/CN2013/084668 2013-04-03 2013-09-30 多色印刷机的真空吸附系统 Ceased WO2014161283A1 (zh)

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