WO2014161283A1

WO2014161283A1 - Vacuum adsorption system for multicolor press

Info

Publication number: WO2014161283A1
Application number: PCT/CN2013/084668
Authority: WO
Inventors: 邱耀光
Original assignee: Qiu Yaoguang
Priority date: 2013-04-03
Filing date: 2013-09-30
Publication date: 2014-10-09
Also published as: CN103203978B; CN103203978A

Abstract

A vacuum adsorption system for a multicolor press comprises a rotation wheel (1), a conveying belt (2), a plurality of vacuum adsorption platforms, a pipeline connecting the plurality of vacuum adsorption platforms, a vacuum pump, at least two opening and closing devices (3) mounted on an end face of the rotation wheel (1), multiple first valves (4) mounted on the conveying belt (2) and connected to the pipeline, and a multichannel rotary joint. Each opening and closing device (3) is connected to the vacuum pump through the multichannel rotary joint, and at least one opening and closing device (3) can push a valve core of the first valve (4) corresponding to the opening and closing device, so that a channel for gas circulation is formed between the opening and closing device (3) and the first valve (4); so as to enable the vacuum pump to be communicated with the vacuum adsorption platforms. By using structures, such as the opening and closing devices, and the first valves, during printing of the multicolor press,, the vacuum adsorption system allows continuous vacuum adsorption for printed materials.

Description

Vacuum adsorption system for multicolor printing presses

Technical field

The present invention relates to the field of printing equipment, and more particularly to a vacuum adsorption system for a multicolor printer.

Background technique

In the screen printing process, 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.

In the prior art multi-color printing press, a fixedly disposed vacuum pump is connected to a vacuum suction stage of a multicolor printing press through a pipe. In the multi-color printing process, 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. However, in the existing multi-color printing press, the vacuum adsorption system is difficult to maintain the vacuum adsorption state of the substrate without interruption.

Summary of the invention

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.

In the vacuum adsorption system of the multicolor printing press of the present invention, 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.

In the vacuum adsorption system of the multicolor printing press of the present invention, 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.

In the vacuum adsorption system of the multicolor printing press of the present invention, 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;

When one end of the movable rod is in sliding contact with the protruding portion of the cam, the other end of the movable rod pushes the spool of the first valve such that a gap is formed between the second valve and the first valve The passage of gas circulation.

In the vacuum adsorption system of the multicolor printing press of the present invention, 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.

In the vacuum adsorption system of the multicolor printer of the present invention, the elastic return member is a spring.

In the vacuum adsorption system of the multicolor printer of the present invention, the movable rod pushes one end of the valve body of the first valve with a seal.

In the vacuum suction system of the multicolor printer of the present invention, a bearing is mounted at one end of the movable lever in sliding contact with the cam.

In the vacuum adsorption system of the multicolor printing press of the present invention, 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.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

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.

detailed description

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2, 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. Different numbers of vacuum adsorption stages can be selected according to the number of printing colors of the multi-color printing machine. 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. In this embodiment, 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. By this positional relationship, 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.

During the printing operation, 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.

Specifically, 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. During the movement, at least one of the opening and closing devices 3 is in sliding contact with the projection of the cam 5. In this embodiment, 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.

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. When the opening and closing device 3 is in sliding contact with the non-protrusion portion of the cam 5, the opening and closing device 3 is out of contact with the first valve 4, and the opening and closing device 3 is in a closed state to ensure the normal operation of the vacuum pump.

Further, in the present embodiment, 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. When one end of the movable lever 32 is in sliding contact with the projection of the cam 5, the other end of the movable lever 32 pushes the spool of the first valve 4. The fixed end of the elastic return member is coupled to the rotating wheel 1, and the movable end of the elastic return member is coupled to the movable rod 32. In this embodiment, 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.

In the present embodiment, 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. .

During the printing operation, when a certain opening and closing device 3 is rotated from the non-protruding portion of the cam 5 to the protruding portion of the cam 5, 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. At this time, 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. 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. When 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. During the printing operation, 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. It can be understood that the number of the opening and closing devices 3 can also have other options. The more the number of the opening and closing devices 3, the more the number of the opening and closing devices 3 communicating with the first valve 4, and the adsorption printing of the vacuum adsorption table. The stability of the object is higher.

In the present embodiment, in order to improve the sealing performance when the first valve 4 and the second valve 31 are in communication, the movable rod 32 pushes the end of the valve body of the first valve 4 with the sealing member 33. By providing the structure of the seal member 33, the sealing performance when the first valve 4 and the second valve 31 are in communication can be improved.

In the present embodiment, in order to reduce the movement resistance when the movable lever 32 is in sliding contact with the cam 5, the bearing 34 is attached to one end of the movable lever 32 in sliding contact with the cam 5. By providing the structure of the bearing 34, the sliding force of the movable lever 32 in sliding contact with the cam 5 is small, and the movement is smoother.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive, and those skilled in the art In the light of the present invention, many forms may be made without departing from the spirit and scope of the invention as claimed.

Claims

A vacuum adsorption system for a multicolor printing press, comprising a rotating wheel (1), a conveyor belt (2) surrounding the rotating wheel (1), and a plurality of mounting on the conveyor belt (2) for adsorbing substrates a vacuum adsorption stage, a pipe connecting the plurality of vacuum adsorption stages, and a vacuum pump; wherein the pipe is a circulating pipe that communicates end to end, and the pipe surrounds the conveyor belt (2); The adsorption system further comprises at least two opening and closing devices (3) mounted on one end face of the rotating wheel (1), a plurality of first valves (4) uniformly mounted on the conveyor belt (2) and connected to the pipe (4) And a multi-channel rotary joint; wherein each of the opening and closing devices (3) is connected to the vacuum pump through the multi-channel rotary joint;

The distance between two adjacent first valves (4) along the conveyor belt (2) is equal to the distance between two adjacent opening and closing devices (3) along the circumference of the rotating wheel (1) ;

At least one of the opening and closing devices (3) pushes a spool of the first valve (4) corresponding thereto such that a passage for gas communication is formed therebetween, thereby allowing the vacuum pump to communicate with the vacuum suction table.
A vacuum adsorption system for a multicolor printer according to claim 1, wherein said vacuum adsorption system further comprises a cam (5);

a projection of the cam (5) is adjacent to a side of the contact portion of the rotating wheel (1) and the conveyor belt (2); at least one of the opening and closing device (3) and the convex portion of the cam (5) Sliding contact;

The opening and closing device (3) in sliding contact with the projection of the cam (5) can push the spool of the first valve (4) such that the opening and closing device (3) and the first A passage for gas flow is formed between the valves (4); the opening and closing device (3) is in a closed state when it is in sliding contact with the non-protrusion portion of the cam (5).
A vacuum adsorption system for a multicolor printing press according to claim 2, wherein said vacuum adsorption system further comprises a fixed shaft (6); said rotating wheel (1) being rotatably mounted on said fixed shaft ( 6) Upper; the cam (5) is fixedly mounted on the fixed shaft (6).
A vacuum suction system for a multicolor printing press according to claim 2, wherein said opening and closing device (3) includes a second attached to said vacuum pump and fixedly mounted on an end surface of said rotating wheel (1) a valve (31), and a movable rod (32) coupled to the valve core of the second valve (31); the movable rod (32) is slidably contactable with the cam (5), and controls the second The valve (31) is opened or closed;

When one end of the movable rod (32) is in sliding contact with the protruding portion of the cam (5), the other end of the movable rod (32) pushes the spool of the first valve (4) such that the first A passage for the gas to flow is formed between the two valve (31) and the first valve (4).
A vacuum suction system for a multicolor printing press according to claim 4, wherein said opening and closing device (3) further comprises an elastic return member; a movable end of said elastic return member and said movable lever (32) Connected, and the fixed end of the elastic return member is coupled to the rotating wheel (1).
A vacuum adsorption system for a multicolor printer according to claim 5, wherein said elastic return member is a spring.
A vacuum suction system for a multicolor printing press according to claim 4, wherein said movable lever (32) pushes one end of the spool of said first valve (4) with a seal member (33).
A vacuum suction system for a multicolor printing press according to claim 4, characterized in that a bearing (34) is mounted at one end of the movable lever (32) in sliding contact with the cam (5).
A vacuum suction system for a multicolor printing press according to claim 1, wherein said rotating wheel (1) is a sprocket; said conveyor belt (2) is a chain that meshes with said sprocket.