CN117734297A - Annular crawler-type screen printing device - Google Patents

Abstract

The invention relates to an annular crawler-type screen printing device, which comprises a roll screen printing method taking two-color roll printing as an example and a sheet monochromatic screen printing method as an example, and can complete multicolor printing by the same method. The coil stock screen printing equipment as shown in fig. 2 comprises a frame, an unreeling mechanism, a reeling mechanism and a screen printing mechanism, wherein the unreeling mechanism and the reeling mechanism are respectively arranged at two ends of the frame; the unreeling mechanism unreels the printing material, the screen printing mechanism prints the printing material and cures the printing material through the UV curing mechanism, and the reeling mechanism reels the printing material. The screen printing equipment has compact structure, large and adjustable printing area, no scraper and high speed. In addition, the unreeling mechanism is used for unreeling continuously, the reeling mechanism is used for reeling continuously, the screen printing mechanism can be used for rolling printing continuously, and the printing efficiency is high; the correction mechanism can correct the printing material, the color mark sensor can ensure the accurate printing position, and the defective rate can be reduced; the printing material is subjected to quick drying through a UV curing mechanism, and the sheet annular crawler type screen printing machine shown in fig. 3 comprises a feeding unit for feeding sheets, a printing unit for printing, a curing unit for curing and a receiving unit for receiving materials.

Description

Annular crawler-type screen printing device

Technical Field

The invention relates to an annular crawler-type screen printing device.

Background

The existing screen printing can be divided into two types of flat screen printing and circular screen printing, the circular screen printing is fast but the printing area is fixed, the printing area cannot be adjusted, the flat screen printing is variable but the printing speed is slow, both the printing area and the printing area need to be used with a scraper in the screen printing process, and the defect that the printing speed cannot be too fast and the scraper needs to be sharpened frequently is overcome.

Disclosure of Invention

The invention aims to overcome the defects of the prior screen printing technology, and provides a ring-type crawler screen printing and scraper-free screen printing device which adopts automatic ink supply, scraper-free screen printing, automatic feeding, automatic material receiving, automatic positioning and automatic solidification. The device can adjust the printing area and has the advantage of high printing speed, meanwhile, a scraper is not used in the printing process, the printing speed can be greatly increased, the printing speed can reach tens of thousands of sheets/hour, the method for adjusting the printing area is to use annular crawler-type screen printing plates with different lengths, one printing unit of the device adopts two 1-bracket screen printing rollers, 1 2-ink conveying pipes, three 3-ink probes, a plurality of 4-ink, 1 5-printing rollers, a plurality of 6-printing materials, 1 7-embossing rollers, one 8-ink homogenizing roller, 1 9-annular screen printing plate, two rows of screen printing positioning holes are arranged on two sides of the annular screen printing plate, two rows of 51-screen printing screen positioning pins are arranged on two sides of the 52-printing rollers as shown in fig. 6, two rows of 31-screen printing screen positioning holes are arranged on the 32-screen printing plate as shown in fig. 4, the combination of the 31-screen printing plate positioning holes and the 51-screen printing plate positioning pins ensures the accurate positioning of the annular crawler type screen printing plate in the printing process, the circular hole positioning mode is adopted, the positioning mode can also adopt other positioning modes, the deviation correction type positioning mode, the limiting positioning mode at two sides of the screen printing plate and the positioning mode of the positioning strips additionally arranged at two sides of the screen printing plate can ensure that the position of the printing screen plate is not changed in the printing process, the annular crawler type screen printing plate is supported by two screen supporting rollers and a printing roller in a triangle shape, which is the most material-saving method, the printing system can also select more than two screen supporting rollers, an ink roller consisting of ink is formed above the ink roller due to different rotating speeds of the printing roller and the ink homogenizing roller, the ink probe can detect whether ink exists, when no ink is detected, the ink adding pump is automatically controlled to add ink through the ink conveying pipe until the ink probe detects the ink, the ink adding pump stops working, the ink layer size can be adjusted by adjusting the distance between the ink homogenizing roller and the printing roller, the ink layer depth of a printed matter can be adjusted, and the ink is printed on the printed matter by pressing the 7-embossing roller and the printing roller.

Detailed Description

The technical scheme of the whole machine of the roll annular crawler-type screen printing machine is shown in fig. 2, and the machine consists of eight units, namely 11-feeding, 12-deviation rectifying, 13-printing 1, 14-UV lamp 1, 15-printing 2, 16-UV lamp 2, 17-paper pulling and 18-material collecting.

The feeding mechanism of the coil stock screen printer is responsible for conveying coil stock, the deviation correcting mechanism is responsible for correcting deviation of the coil stock, the deviation correcting system is composed of a double-servo high-precision deviation correcting system, the deviation correcting precision can reach 0.05mm, the printing 1 of the coil stock screen printer is responsible for printing of a first color, the UV lamp 1 is responsible for solidifying printing ink of the first color, the printing 2 of the reel screen printer is responsible for printing of a second color, the UV lamp 2 is responsible for solidifying the second color ink, and the like can be used for multicolor printing, the UV lamp can be replaced with an infrared solidifying or microwave solidifying mechanism, the material pulling mechanism of the coil stock screen printer is responsible for pulling printing materials, the material collecting mechanism of the coil stock screen printer is responsible for winding the printing materials, and a color mark sensor is arranged in front of each printing unit of the annular crawler type screen printer for automatically printing and positioning the printing unit.

The whole technical scheme of the sheet annular crawler-type screen printing machine is shown in fig. 3, and the sheet annular crawler-type screen printing machine consists of eight units, namely a 21-paper feeding femto, a 22-screen printing unit, a 23-UV curing lamp, a 24-paper guide belt, a 25-paper collecting unit, a 26-paper feeding unit, a 27-embossing roller and a 28-paper guide roller, wherein the screen printing unit can be composed of a plurality of screen printing units so as to print a plurality of colors, and the UV curing unit is arranged behind each screen printing unit.

The further technical scheme is as follows: the UV curing may be replaced by ultraviolet LED lamp curing and infrared lamp curing or microwave curing.

The further technical scheme is as follows: the feeding end of the coil stock annular crawler-type screen printing mechanism is provided with a plurality of feeding rollers for tensioning printing materials, and the discharging end of the coil stock annular crawler-type screen printing mechanism is provided with a conveying roller.

The further technical scheme is as follows: the feeding mechanism and the receiving mechanism of the coiled material annular crawler-type screen printing machine comprise air expansion shafts for winding printing materials, wherein the air expansion shafts for receiving the printing materials are provided with driving motors; the unreeling mechanism and the feeding mechanism are respectively arranged at the lower sides of the two ends of the rack.

The further technical scheme is as follows: color mark sensors for alignment are arranged at the front end of the printing 1 and the front end of the printing 2 of the roll annular crawler type screen printer, and are used for adjusting the positions of servo driving motors of a printing unit behind the color mark sensors.

Compared with the prior art, the invention has the beneficial effects that: the screen printing equipment has the advantages of compact structure, small occupied space, adjustable printing area, high printing speed, no scraper in the printing process, no scraper grinding and high printing speed. In addition, the feeding mechanism of the coiled material annular crawler-type screen printing machine continuously unreels, the material collecting mechanism continuously winds, the screen printing mechanism can continuously roll and print, and the printing efficiency is high; the correction mechanism can correct printing materials, the color code sensor can ensure accurate printing positions, the defective rate can be reduced, the printing speed is high, the module design is convenient to install, and the degree of automation is high.

Drawings

The invention is further described below with reference to the drawings and specific embodiments.

Fig. 1 is a technical scheme of a printing unit structure of an endless track type screen printer.

Fig. 2 is a structural diagram of a whole machine technical scheme of a coil stock silk screen printing machine.

Fig. 3 is a block diagram of a web endless-track screen printer according to the present invention.

FIG. 4 is a diagram of the structure of an endless track type halftone of the present invention.

Fig. 5 is a physical structure diagram of a printing unit of the endless track screen printing machine of the present invention.

FIG. 6 is a block diagram of a printing roller screen positioning mechanism of an endless screen crawler screen printer according to the present invention.

In order to more fully understand the technical content of the present invention, the following technical solutions of the present invention will be further described and illustrated with reference to specific embodiments, but are not limited thereto.

The foregoing examples are provided to further illustrate the technical contents of the present invention for the convenience of the reader, but are not intended to limit the embodiments of the present invention thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.

Claims (8)

1. The invention provides an annular crawler-type screen printing device, and relates to an annular crawler-type screen and scraper-free screen printing machine. The device can adjust the printing area and has the advantage of high printing speed, meanwhile, a scraper is not used in the printing process, the printing speed can be greatly increased, the printing speed can reach tens of thousands of sheets/hour, the method for adjusting the printing area is to use two annular crawler type screen plates with different lengths, one printing unit of the device adopts two 1-supporting screen plate rollers, 1 2-ink conveying pipes, three 3-ink probes, a plurality of 4-ink, 1 5-printing rollers, a plurality of 6-printing materials, 1 7-embossing rollers, one 8-ink homogenizing roller, 1 9-annular screen plate, two rows of screen plate positioning holes are arranged on two sides of the annular crawler type screen plate, two rows of 51-screen plate positioning pins are arranged on two sides of 52-printing rollers as shown in fig. 6, two rows of 31-screen plate positioning holes are arranged on the 32-screen plate as shown in fig. 4, the combination of the 31-screen printing screen positioning holes and the 51-screen printing screen positioning pins as shown in fig. 6 ensures the accurate positioning of the annular crawler-type screen printing screen, the circular hole positioning mode is adopted, other positioning modes such as a deviation correction positioning mode and a screen limiting positioning mode are adopted, screen limiting devices are arranged on two sides of a printing roller, the screen printing screen position is ensured not to change in the printing process, the annular crawler-type screen printing screen is supported by two screen supporting rollers and a printing roller in a triangular shape, the printing system can also adopt more than two screen supporting rollers, an ink roller consisting of ink is formed due to different rotation speeds of the printing roller and the ink distributing roller, three ink probes are arranged above the ink roller, the ink probe can detect whether ink exists, when no ink is detected, the ink adding pump is automatically controlled to add ink through the ink conveying pipe until the ink probe detects the ink, the ink adding pump stops working, the ink layer size can be adjusted by adjusting the distance between the ink homogenizing roller and the printing roller, the ink layer depth of a printed matter can be adjusted, and the ink is printed on the printed matter by pressing the 7-embossing roller and the printing roller.

2. The endless-track screen printing device as recited in claim 1, wherein a UV curing mechanism is provided on a rear side of the endless-track screen printing machine, and the UV curing is capable of ultraviolet curing, infrared curing, or microwave curing.

3. The endless track type screen printing device according to claim 1, when used for roll-up, characterized in that the feed end of the roll-up screen printing machine is provided with a plurality of tension rollers for tensioning printing materials, and the take-up end is provided with a take-up roller.

4. The endless-track screen printing device as claimed in claim 1, when used for roll-up, wherein the feeding mechanism and the receiving mechanism of the roll-up endless-track screen printing machine comprise air expansion shafts for winding printing materials, and the receiving unit comprises a driving motor connected with the air expansion shafts for transmission; the feeding mechanism and the receiving mechanism are respectively arranged at the lower sides of the two ends of the frame.

5. The endless-track screen printing device as recited in claim 1, when used in a web, comprising the steps of: step 1, unreeling a printing material by an unreeling mechanism; step 2, the printing material passes through a correction mechanism, corrects the position of the printing material and enters a screen printing mechanism; step 3, the screen printing mechanism carries out continuous rolling printing on the printing material; the step 4, the printed printing material passes through a plurality of conveying rollers and is cured and shaped after passing through a UV curing mechanism; and 5, winding the solidified printing material by a material receiving mechanism to finish the printing work.

6. The endless-track screen printing device as claimed in claim 1, wherein the endless-track screen printing plate is provided with two rows of circular positioning holes or positioning holes of other shapes on both sides as shown in fig. 4 for positioning the screen printing plate, and the printing roller of the printing machine is provided with two rows of circular protruding positioning pins or positioning pins of other shapes on both ends as shown in fig. 6 for precisely positioning the screen printing plate.

7. The front end of the printing unit of the endless track type screen printing device of claim 1 is provided with a color code sensor for adjusting printing alignment and ensuring accurate printing.

8. The screen positioning mechanism of the annular crawler-type screen printing device of claim 1 can be used for positioning two rows of circular holes, or can be used for positioning two sides of the screen in a limiting manner, and positioning strips and the like are additionally arranged on two sides of the screen.