Multicolor offset press for label printing

Abstract

The utility model discloses a multicolor offset press for label printing, which belongs to the technical field of offset presses and comprises an unwinding roller and a winding roller which are mounted on two sides of the top of a bottom plate, a plurality of groups of offset printing devices are mounted on the bottom plate and positioned between the unwinding roller and the winding roller, a drying box is arranged on one side of each offset printing device, and the drying box is arranged on the other side of each offset printing device. A drying machine is arranged at the top of the drying box, a material guiding roller, an ink distributing roller and two sets of offset printing rollers are arranged in the offset printing devices, an inking device is arranged at the tops of the offset printing devices, multiple sets of driving gears which are meshed with one another are arranged on one sides of the offset printing devices, and linkage devices are arranged among the multiple sets of offset printing devices; according to the multicolor offset press disclosed by the utility model, the uniform printing of ink is ensured, the printing quality of the printing roller is improved, and the use of labels is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to offset press technical field especially relates to a multicolor offset press for label printing. BACKGROUND

[0002] Offset press is one kind of lithographic press, when printing, printing picture is first printed on rubber roller from printing plate, and then is transferred to paper by rubber roller; offset press can be divided into single color, double color, four color and multicolor printing press according to the printing color number completed by once paper feeding.

[0003] When printing by using offset press, continuous ink feeding in offset press is needed, and ink is delivered to printing roller, but the offset press in the prior art is prone to uneven ink distribution when delivering ink to printing roller, thereby affecting the printing quality of printing roller and the use of final label. UTILITY MODEL CONTENT

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to provide a multicolor offset press capable of ensuring uniform ink printing, improving the printing quality of printing roller and ensuring label use.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a multicolor offset press for label printing, including unwinding roller and take-up roller installed at the both sides of the top of bottom plate, a plurality of groups of offset printing devices are installed on the bottom plate and are located between unwinding roller and take-up roller, one side of offset printing device is provided with drying box, drying machine is arranged at the top of drying box, the inside of offset printing device is provided with guide roller, ink distributing roller and two groups of offset printing roller respectively,

[0007] The top of offset printing device is provided with inking device, a plurality of groups of driving gear that are provided with intermeshing are arranged at one side of offset printing device, and linkage device is arranged between a plurality of groups of offset printing device to drive offset printing device operation.

[0008] The utility model optimizes the technical scheme in that the inking device includes the ink storage tank that is provided with ink inlet pipe at the top, the ink storage tank is provided with the communication pipeline with the inking tank arranged in the inside of offset printing device, the communication pipeline is provided with solenoid valve, eccentric wheel is rotatably connected in the inside of inking tank, the eccentric wheel is connected with linkage device, and the inside of inking tank is provided with ink outlet device.

[0009] The utility model discloses preferably technical scheme lies to, the ink outlet device includes setting on the ink supply box bottom ink outlet hole on the sealing plate, the sealing plate with eccentric wheel abuts, the sealing plate both sides are provided with the movable plate, the movable plate section structure is L type shape, the movable plate inside is provided with T type board, and the spring is connected between T type board bottom and ink supply box bottom.

[0010] The utility model discloses preferably technical scheme lies to, the ink outlet end of ink supply box bottom ink outlet hole is provided with ink outlet sponge, and the ink roller is set up in ink outlet sponge bottom.

[0011] The utility model discloses preferably technical scheme lies to, the ink roller one side is provided with the scraper, and the scraper one side is connected with the material collecting box through the through slot.

[0012] The utility model discloses preferably technical scheme lies to, the linkage device includes setting up in the connecting gear of multiple groups of offset printing device one side, and the rack drive connection is passed to the moulding connecting gear between, the connecting gear is coaxial with eccentric wheel and drive gear and sets up, and the gear shaft of drive gear is connected with motor.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses through linkage device control eccentric wheel rotation, under the cooperation of spring, movable plate and T type board, control sealing plate operation, thereby control ink outlet hole and carry out the ink outlet, and the ink flows to ink outlet sponge through ink outlet hole, and makes the ink stain to ink roller on the ink outlet sponge in the process of ink roller rotation, and the ink is stained to offset printing roller on ink roller, thereby carries out the printing to label, avoids the ink and is directly transported to offset printing roller, causes uneven distribution of ink, thereby influences the printing quality of offset printing roller, influences the use of final label, improves label printing's effect and quality, makes it meet the requirement of printing production. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of multicolor offset press that the utility model provides in specific embodiment;

[0016] Figure 2 It is the structure front view of multicolor offset press that the utility model provides in specific embodiment;

[0017] Figure 3 It is the structure schematic diagram of ink supply device that the utility model provides in specific embodiment;

[0018] Figure 4 It is the structure schematic diagram of ink outlet device that the utility model provides in specific embodiment.

[0019] In the drawings, the component list that each sign represents is as follows:

[0020] 1, bottom plate; 2, unwinding roller; 3, winding roller; 4, offset printing device; 41, material collecting box; 42, material guide roller; 43, scraper; 44, ink distributing roller; 45, offset printing roller; 5, drying box; 51, drying machine; 6, ink feeding device; 61, ink storage box; 62, ink feeding pipe; 63, ink feeding box; 64, eccentric wheel; 65, ink discharging device; 651, sealing plate; 652, movable plate; 653, T-shaped plate; 654, spring; 66, ink discharging sponge; 7, driving gear; 8, linkage device; 81, connecting gear; 82, rack; 83, motor. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model is further illustrated below in combination with the drawings and through specific embodiments.

[0022] A multi-color offset printing machine for label printing comprises unwinding rollers 2 and winding rollers 3 installed on both sides of the top of a bottom plate 1, a plurality of offset printing devices 4 are installed on the bottom plate 1 and located between the unwinding rollers 2 and the winding rollers 3, an ink drying box 5 is arranged on one side of the offset printing devices 4, a drying machine 51 is arranged on the top of the ink drying box 5, and material guide rollers 42, ink distributing rollers 44 and two groups of offset printing rollers 45 are arranged in the offset printing devices 4 respectively.

[0023] An ink feeding device 6 is arranged on the top of the offset printing devices 4, a plurality of driving gears 7 are arranged on one side of the offset printing devices 4 and meshed with each other, and a linkage device 8 is arranged between the plurality of offset printing devices 4 to drive the offset printing devices 4 to work.

[0024] The ink feeding device 6 comprises an ink storage box 61 provided with an ink feeding pipe 62 on the top, the ink storage box 61 is provided with a communication pipeline connected with an ink feeding box 63 arranged in the offset printing devices 4, an electromagnetic valve is arranged on the communication pipeline, an eccentric wheel 64 is rotatably connected in the ink feeding box 63, the eccentric wheel 64 is connected with the linkage device 8, an ink discharging device 65 is arranged in the ink feeding box 63, an ink discharging sponge 66 is arranged on the ink discharging end of the ink discharging hole in the bottom of the ink feeding box 63, and the ink distributing roller 44 is arranged at the bottom of the ink discharging sponge 66.

[0025] The multi-color ink is added into the corresponding ink storage tank 61 through the ink inlet pipe 62, the label paper to be printed is installed on the unwinding roller 2, the other end passes through the offset printing device 4 and the drying tank 5 and is wound on the winding roller 3, the offset printing device 4 is started to work, the electromagnetic valve is opened, the ink in the ink storage tank 61 enters the ink supply tank 63 through the communication pipe, the linkage device 8 drives the eccentric wheel 64 to rotate, the eccentric wheel 64 abuts against the ink outlet device 65, the eccentric wheel 64 rotates one circle, and the ink outlet device 65 controls the ink to be discharged from the ink outlet hole once, the ink is absorbed by the ink outlet sponge 66, and then the ink on the ink outlet sponge 66 is stained on the ink distributing roller 44 in the rotating process of the ink distributing roller 44, and the ink is stained on the offset printing roller 45 through the ink distributing roller 44, so that the label is printed, the ink is avoided to be directly delivered to the offset printing roller 45, the uneven distribution of the ink is avoided, the printing quality of the offset printing roller 45 is affected, the use of the final label is affected, the printing effect and quality of the label are improved, and the label meets the requirements of printing production.

[0026] As a possible implementation manner of the present scheme, preferably, the ink outlet device 65 comprises a sealing plate 651 arranged on the ink outlet hole at the bottom of the ink supply tank 63, the sealing plate 651 abuts against the eccentric wheel 64, movable plates 652 are arranged on both sides of the sealing plate 651, the movable plates 652 have an L-shaped cross section, a T-shaped plate 653 is arranged in the movable plates 652, and springs 654 are connected between the bottom of the T-shaped plate 653 and the bottom of the ink supply tank 63.

[0027] The eccentric wheel 64 rotates under the action of the linkage device 8 and is always separated from the sealing plate 651 in the rotating process, when the eccentric wheel 64 rotates upwards, the T-shaped plate 653 drives the movable plates 652 to move upwards under the action of the springs 654, the movable plates 652 drive the sealing plate 651 to move upwards in the moving process, the ink flows to the ink outlet sponge 66 through the ink outlet hole, the ink outlet sponge 66 stains the ink on the ink distributing roller 44, the ink distributing roller 44 uniformly stains the ink on the offset printing roller 45, the printing of the offset printing roller 45 is ensured to be uniform, and the printing quality of the label is improved.

[0028] As a possible implementation manner of the present scheme, preferably, the ink distributing roller 44 is provided with a scraper 43 on one side, and a material collecting tank 41 is connected to the scraper 43 on one side through a through groove. By arranging the scraper 43, the excessive ink on the surface of the ink distributing roller 44 is avoided to affect the printing quality of the subsequent offset printing roller 45, the excessive ink scraped off is collected in the material collecting tank 41 through the through groove and the cooperation of the scraper 43 and the material collecting tank 41, the waste caused by excessive ink is reduced, and the uniformity of the subsequent printing of the offset printing roller 45 is ensured.

[0029] As a possible implementation of the present scheme, preferably, the linkage device 8 comprises connecting gears 81 arranged on one side of the plurality of offset printing devices 4, the connecting gears 81 are drivingly connected through a rack 82, the connecting gears 81 are coaxially arranged with the eccentric wheels 64 and the driving gears 7, and a motor 83 is connected to a gear shaft of the driving gears 7.

[0030] The motor 83 drives the driving gears 7 to rotate, since the driving gears 7 are coaxially arranged with the connecting gears 81 and the eccentric wheels 64, the plurality of offset printing devices 4 are synchronously controlled to work through the cooperation of the connecting gears 81 and the rack 82 while the inking device 65 is controlled to ink out by the eccentric wheels 64.

[0031] The utility model is described through preferred embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. The utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the claims of the present application belong to the protection scope of the utility model.

Claims

1. A multi-color offset printing press for label printing, characterized by: Including the unwinding roll (2) and winding roll (3) installed on both sides of the top of the bottom plate (1), a plurality of groups of offset printing devices (4) are installed on the bottom plate (1) and located between the unwinding roll (2) and the winding roll (3), one side of the offset printing device (4) is provided with a drying oven (5), the top of the drying oven (5) is provided with a dryer (51), and the inside of the offset printing device (4) is respectively provided with a guide roller (42), an ink roller (44) and two groups of offset rollers (45); The top of the offset printing device (4) is provided with an inking device (6), one side of the offset printing device (4) is provided with a plurality of groups of driving gears (7) arranged in mesh with each other, and a linkage device (8) is arranged between a plurality of groups of the offset printing device (4) to drive the offset printing device (4) to work.

2. The multi-color offset printing machine for label printing according to claim 1, characterized in that: The inking device (6) comprises an ink storage tank (61) provided with an ink inlet pipe (62) at the top, the ink storage tank (61) is provided with a communication pipeline with an ink supply tank (63) arranged inside the offset printing device (4), the communication pipeline is provided with a solenoid valve, the inside of the ink supply tank (63) is rotatably connected with an eccentric wheel (64), the eccentric wheel (64) is connected with the linkage device (8), and the inside of the ink supply tank (63) is provided with an ink outlet device (65).

3. The multi-color offset printing machine for label printing according to claim 2, characterized in that: The ink outlet device (65) comprises a sealing plate (651) arranged on the ink outlet hole at the bottom of the ink supply tank (63), the sealing plate (651) abuts against the eccentric wheel (64), the sealing plate (651) is provided with a movable plate (652) on both sides, the movable plate (652) has an L-shaped cross-sectional structure, the inside of the movable plate (652) is provided with a T-shaped plate (653), and the bottom of the T-shaped plate (653) is connected with the bottom of the ink supply tank (63) through a spring (654).

4. The multi-color offset printing machine for label printing according to claim 3, characterized in that: An ink outlet sponge (66) is arranged at the ink outlet end of the ink outlet hole at the bottom of the ink supply tank (63), and the ink roller (44) is arranged at the bottom of the ink outlet sponge (66).

5. The multi-color offset printing machine for label printing according to claim 1, characterized in that: The ink roller (44) is provided with a scraper (43) on one side, and the scraper (43) is connected with a material collecting tank (41) through a through slot on one side.

6. The multi-color offset printing machine for label printing according to claim 1, characterized in that: The linkage device (8) comprises a connecting gear (81) arranged on one side of a plurality of groups of the offset printing device (4), the connecting gears (81) are drivingly connected through a rack (82) between the connecting gears (81), the connecting gears (81) are coaxially arranged with the eccentric wheel (64) and the driving gear (7), and the gear shaft of the driving gear (7) is connected with a motor (83).

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