CN201058514Y - Circular flattening type offset press - Google Patents

Abstract

The utility model provides a circle flattening formula offset press, includes adhesive tape cylinder, plate cylinder, printing table and draws material cylinder, is provided with the annular track on the offset press, and the printing table sets up in the track below, and plate cylinder sets up in the middle of the track, is provided with arc printing ink section in the track, when the adhesive tape cylinder rolls this section with plate cylinder surface crimping, required printing pattern rendition is to the adhesive tape cylinder on, the track corresponds the printing table and is provided with straight printing section, draws the one-way intermittent type operation of material cylinder. The track is provided with a chain or a steel cable connected with an output shaft of the driving motor, and the adhesive tape roller is arranged on the chain or the steel cable. The side surface of the track is provided with annular internal teeth similar to the shape of the track, the chain is provided with a planet wheel, the planet wheel is meshed with the internal teeth, and the end part of the adhesive tape roller is arranged on the planet wheel. The paper feeding device has the characteristics of unidirectional high-speed operation, intermittent paper feeding, line-surface contact between the adhesive tape roller and the printing table, high printing speed, high printing precision, low working noise and flexible operation.

Description

Rotary Flat Offset Press

technical field

The utility model relates to an offset printing machine, in particular to a one-way intermittent circular flattening type offset printing machine.

Background technique

A common offset printing machine that uses roll materials, the printing material is passed between the adhesive tape cylinder and the impression cylinder, so the printing material is in continuous motion during the printing process, there is no gap at all, and the specifications of all printed products are determined by the adhesive tape cylinder. The perimeter is determined, and the specifications cannot be changed at will.

The paper feeding method of the intermittent rotary machine is that during the printing process, the printing material is synchronously feeding in the same direction between the two cylinders: when the printing plate cylinder turns to the preset rotary position, the printing material immediately returns in the reverse direction , this way of paper feeding is back and forth movement, and the printing material basically has no real interval and sufficient residence time in the movement, so this printing method can only be used for printing, and the flat die-cutting and other processes after printing cannot be carried out on the same machine at the same time conduct.

Nowadays, the rotary flat printing machine that uses roll materials can only use the embossing method, and cannot use other printing methods. During printing, the printing plate cylinder can only move back and forth in the longitudinal direction of the printing machine. There are also certain restrictions on the step distance between plates.

In addition, during the printing process of the offset printing machine, due to the use of a ratchet mechanism or a linkage mechanism to apply ink, and to print back and forth with the rubber roller, it is necessary to drive the motor forward and reverse or to change direction through an intermediate mechanism. It is difficult to achieve high speed and high speed in actual production. Quality printing effects.

If the die-cutting is carried out when the printing material is in motion, then the die-cutting must use a roller die-cutting knife. This kind of roller die-cutting knife is very expensive on the one hand and has too many restrictions on specifications.

Utility model content

The technical problem to be solved by the utility model is to provide a simple and reasonable structure, one-way high-speed operation of the adhesive roller, one-way intermittent operation of the pulling roller, line-surface contact between the adhesive roller and the printing table, fast printing speed, high printing accuracy, and low working noise. A rotary flat offset printing machine with low cost, flexible operation and long service life to overcome the deficiencies in the prior art.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a circular flattening offset printing machine, including a rubber cloth cylinder, a printing plate cylinder, a printing table and a material pulling cylinder, and its structural feature is that the offset printing machine is provided with a circular track, and the printing table It is set under the track, and the printing plate cylinder is set in the middle of the track. There is an arc-shaped ink section in the track. When the rubber cloth roller passes through this section, it will be in pressure contact with the surface of the printing plate cylinder, and the required printing pattern will be transferred to the rubber cloth cylinder. Corresponding to the printing table, there is a flat printing section, and the pulling cylinder runs intermittently in one direction.

The length of the arc-shaped ink section in the above track is equal to the circumference of the rubber plaster cylinder, and is arranged concentrically with the printing plate cylinder, and the length of the straight printing section is equal to the circumference of the rubber plaster cylinder.

A chain or a steel cable connected with the output shaft of the drive motor is arranged in the above track, and the rubber cloth roller is arranged on the chain or the steel cable.

The side of the above-mentioned track is provided with ring-shaped internal teeth similar in shape to the track, and the chain is provided with planetary gears, the planetary gears mesh with the internal teeth, and the end of the rubber cloth roller is set on the planetary gears

The side of the chain plate in the above chain is provided with rollers or rolling bearings, and the rollers or rolling bearings are crimped in the track.

The above-mentioned printing machine is also provided with an ink transfer mechanism, which includes ink transfer sticks and glue sticks that are pressed against each other. The motors are connected, and the intermediate roller with a gap is set between the front and rear rubber sticks.

When the utility model is working, the drive motor drives the chain to move in one direction at high speed in one direction all the time in the track, that is, to rotate around the printing plate cylinder arranged in the middle of the track, and the rubber cloth roller set on the chain through the planetary wheel is also unidirectional along the track. Since the side of the track is provided with ring-shaped internal teeth, the rubber plaster cylinder itself rotates around the printing plate cylinder in the center and at the same time rotates. The surface is crimped and moves in the same direction, because the arc length of the arc-shaped ink segment AB is equal to the circumference of the tape cylinder, and the arc-shaped ink segment AB is set concentrically with the printing plate cylinder, so when the tape cylinder rolls over point B, that is Automatically transfer good ink patterns.

When the rubber blanket cylinder moves to the straight printing section CD on the track, the blanket cylinder contacts the printing material on the workbench to start printing, and at this moment, the printing material is still. Because the length of the flat printing section CD is equal to the circumference of the rubber blanket cylinder, so when the blanket cylinder moves to point D, the printing process of one version ends and the printing of the next version starts.

When the adhesive roller leaves the point D, it is out of the crimping with the printing material, and the pulling roller starts to work automatically. Since the adhesive roller leaves the flat printing section CD for the first time, it runs along the circular track and enters the flat printing section CD again. The period of time is relatively long. Of course, this long time is only relative to the simple printing time or simple transfer ink pattern or ink time. Theoretically speaking, the pulling roller can pull the printing material forward during this period It can be completed within any period of time, but it must be stopped when the rubber blanket cylinder enters the flat printing section CD again, that is, when the rubber blanket cylinder enters the flat printing section CD along the track, the printing material is still, and relevant printing, related plane die-cutting, Creases, piezoelectric aluminum, cutting sheets, printing serial numbers or subsequent multi-color or register printing are carried out while the substrate is at rest.

Since the driving motor keeps rotating in one direction, and there is no intermediate reversing mechanism, its operating speed is higher, and the adhesive tape cylinder is also printed at high speed in the track, and the matching ink transfer mechanism is also unidirectional under the action of the driving motor. Rotate at high speed and transfer ink, in order to prevent the moving rubber cloth cylinder from interfering with the middle roller that transfers ink, a space is set on the middle roller to avoid the high speed moving rubber cloth roller, so the entire printing speed and ink filling speed are relatively fast , when the tape cylinder is printing, the pulling cylinder just stops, and the subsequent processes such as related die-cutting can be carried out at this time, and because the printing material is in a static state, the best effect can be achieved.

In order to ensure that the chain in the track can rotate flexibly under high-speed operation, the utility model is provided with rollers on the side of the chain plate, and the running accuracy is guaranteed by the crimping of the rollers and the track. Since the rubber cloth cylinder is arranged on the planetary gear, and the planetary gear meshes with the internal teeth provided on the side of the track, the movement precision of the rubber cloth cylinder is relatively high, and finally better printing quality can be obtained.

In summary, the utility model can truly realize high-speed one-way operation, one-way intermittent paper feeding, one-way intermittent printing, circular flattening, and timely die-cutting.

Description of drawings

Fig. 1 is a working principle diagram of an embodiment of the utility model.

Fig. 2 is a three-dimensional structural schematic diagram of an embodiment of the utility model.

Fig. 3 is a schematic diagram of the three-dimensional structure of Fig. 2 turned 180 degrees.

FIG. 4 is a schematic structural diagram of the left view of FIG. 2 .

FIG. 5 is a schematic diagram of the right view of FIG. 2 .

Fig. 6 is a schematic diagram of an enlarged assembly structure of a track, a chain and a bearing.

Fig. 7 is a schematic diagram of an enlarged assembly structure of the track, the internal teeth, the chain and the planetary gear.

8-9 are structural schematic diagrams of the working process of the ink transfer mechanism of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

In the figure: 1 is the rubber cloth cylinder, 2 is the track, 3 is the printing plate cylinder, 4 is the printing table, 5 is the pulling cylinder, 6 is the intermediate roller, 7 is the chain, 8 is the planetary wheel, 9 is the inner tooth, 10 is the bearings.

Referring to Fig. 1-Fig. 3, the circular flattening type offset printing machine is provided with a circular track 2 symmetrically left and right, and the track is arc-triangular in shape, and transition arcs are set at the corners. The length of the arc-shaped ink section AB in the track 2 is equal to the circumference of the adhesive tape cylinder 1 , and the arc-shaped ink section AB is concentrically arranged with the printing plate cylinder 3 . The printing table 4 is arranged below between the two rails 2, and the two ends of the plate cylinder 3 are respectively arranged in the middle of the left and right rails. When the rubber cloth cylinder 3 rolls over this section, it is in pressure contact with the surface of the printing plate cylinder 3, and the required printing pattern is transferred to the rubber cloth cylinder. The track 2 corresponds to the printing table 4 and is provided with a straight printing section CD, and the length of the straight printing section CD is Equal to the circumference of adhesive tape cylinder 1. The track 2 is provided with a chain 7 connected to the output shaft of the drive motor, see Fig. 6-Fig. The internal teeth are meshed, the end of the adhesive tape cylinder 1 is arranged on the planetary wheel, and the side of the chain plate in the chain is provided with a bearing 10, and the bearing is crimped in the track. The pulling drum 5 on the side of the workbench runs intermittently in one direction. The printing machine is also equipped with an ink transfer mechanism, as shown in Figure 8-9, the ink transfer mechanism includes an ink transfer stick and a glue stick that are pressed against each other, and the ink transfer stick and the glue stick are connected through gears and chains respectively, as shown in Figure 4- Fig. 5, the gear and the chain are connected with the driving motor, and the intermediate roller with the space avoidance is arranged between the front and rear rubber sticks.

Claims (9)

1. round planishing type offset press, comprise blanket cylinder (1), plate cylinder (3), print station (4) and draw feed roller (5), it is characterized in that offset press is provided with circular orbit (2), print station is arranged on the track below, plate cylinder is arranged in the middle of the track, be provided with arc printing ink section AB in the track, when blanket cylinder rolls across this section and the crimping of plate cylinder surface, required ink logo is transferred on the blanket cylinder, the corresponding print station of track is provided with straight print zone CD, draws the unidirectional intermittent duty of feed roller.

2. round planishing type offset press according to claim 1 is characterized in that the arc printing ink section AB length in the described track (2) equates with the girth of blanket cylinder (1).

3. round planishing type offset press according to claim 2 is characterized in that arc printing ink section AB and the concentric setting of plate cylinder (3) in the described track (2).

4. round planishing type offset press according to claim 1 is characterized in that the straight print zone CD length in the described track (2) equates with the girth of blanket cylinder (1).

5. according to the described round planishing type offset press of the arbitrary claim of claim 1 to 4, it is characterized in that being provided with chain (7) or the cable wire that joins with the drive motors output shaft in the described track (2), blanket cylinder (1) is arranged on chain or the cable wire.

6. round planishing type offset press according to claim 5, it is characterized in that described track (2) side is provided with the ring-type internal tooth (9) similar to trade shape, chain (7) is provided with planetary gear (8), planetary gear and internal tooth engagement, and the blanket cylinder end is arranged on the planetary gear.

7. round planishing type offset press according to claim 5 is characterized in that the Chain plate side in the described chain is provided with roller or rolling bearing (10), and roller or rolling bearing are crimped in the track.

8. according to claim 1 or 2 or 3 or 4 or 6 described round planishing type offset presses, it is characterized in that described track is the circular arc triangular shape, its edge is provided with transition arc.

9. round planishing type offset press according to claim 1, it is characterized in that also being provided with on the described printing machine ink transfer mechanism, this ink transfer mechanism comprises the ink transfer rod and the glue rod of mutual crimping, ink transfer rod and glue rod join by gear and/or chain respectively, gear and/or chain and drive motors join, and the intermediate calender rolls (6) of band clearance position is arranged between the glue rod of front and back.

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