One-net two-color rotary screen printing unit

Abstract

The invention discloses a one-net two-color rotary screen printing unit, which comprises a rotary screen and a scraping and printing mechanism. The scraping and printing mechanism comprises a scraping and printing workpiece and a pulp pipe for supplying pulp to the rotary screen. Both ends of the pulp pipe are open ends. The pulp pipe is divided into two sections of pulp supply pipes which are not communicated with each other by a partition plate arranged in the middle. The pulp pipe passes through two axial ends of the rotary screen. Each open end of the pulp pipe is respectively connected with a pulp supply device pipe. The pulp pipe is provided with a plurality of pulp supply holes at intervals along its axial direction. An air blowing pipe is installed in the rotary screen. One end of the air blowing pipe is connected with an air compression device outside the rotary screen. The other end of the air blowing pipe blows air toward the bottom wall of the rotary screen below the middle of the pulp pipe. The compressed air sprayed from the air blowing port blows to the bottom wall of the rotary screen and then moves toward the two ends of the rotary screen, thereby blocking the pulp at the two ends inside the rotary screen from gathering to the middle, playing a partition role, thereby realizing the simultaneous and parallel printing of two fabrics with different colors, thereby improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the field of textile machinery and equipment, in particular to a one-net two-color rotary screen printing unit. Background Art

[0002] The rotary screen printing machine is a main equipment for textile printing. Its working principle is: a cylindrical metal screen with a pattern (commonly known as a round screen) is used to make a pure rolling motion on the fabric to be printed, so that the dye in the round screen is transferred to the fabric through the mesh of the round screen with a pattern under the pressure of the scraper.

[0003] The main structure of the printing unit of the rotary screen printing machine includes a rotary screen and a scraping mechanism. The scraping mechanism includes a scraping workpiece and a pulp pipe for supplying pulp to the rotary screen. One end of the pulp pipe is closed, and the other end of the pulp pipe is connected to the pulp supply system. The bottom of the pulp pipe is provided with several pulp supply holes along its length. The scraping workpiece can be a magnetic roller or a scraper, which is installed in the rotary screen and fits the bottom inner wall of the rotary screen. The structure of the traditional printing unit determines that each rotary screen in the traditional printing process can only print one color, and it is impossible to print two colors on two fabrics at the same time. Summary of the invention

[0004] The object of the present invention is to provide a one-net two-color rotary screen printing unit.

[0005] The technical scheme for achieving the purpose of the present invention is: a one-net two-color rotary screen printing unit, which includes a rotary screen and a scraping and printing mechanism located in the rotary screen, the scraping and printing mechanism includes a scraping and printing workpiece and a pulp pipe for supplying pulp to the rotary screen, the scraping and printing workpiece is located on the bottom wall inside the rotary screen, both ends of the pulp pipe are open ends, the pulp pipe is divided into two sections of pulp supply pipes that are not connected to each other by a partition arranged in the middle, the pulp pipe passes through the two axial ends of the rotary screen, each open end of the pulp pipe is connected to a pulp supply device pipe respectively, and the bottom of the tube body of the pulp pipe located in the rotary screen is provided with a plurality of pulp supply holes spaced along its axial direction; a blowing pipe is also installed in the rotary screen, one end of the blowing pipe is connected to an air compression device outside the rotary screen, the other end of the blowing pipe is bent toward the bottom wall of the rotary screen below the middle of the pulp pipe and an air outlet opposite to the bottom wall of the rotary screen is opened, the air outlet of the blowing pipe is flat and contracted, and the long side of the air outlet is perpendicular to the projection of the axial direction of the pulp pipe in the horizontal plane.

[0006] Furthermore, the scraping workpiece is a magnetic roller or a scraper.

[0007] The innovative one-net two-color rotary screen printing unit of the present invention transforms the traditional pulp pipe into a structure with two ends open and the middle closed, so that the pulp is fed into the two ends of the pulp pipe at the same time and then flows from the pulp feeding holes to the bottom wall of the rotary screen respectively, and the compressed air sprayed from the air outlet blows to the bottom wall of the rotary screen and then moves to the two ends of the rotary screen, thereby preventing the pulp at the two ends of the rotary screen from gathering in the middle. Its structure is simple and easy to assemble. When the width of the fabric is less than half of the effective printing width of the machine, two fabrics can be fed in parallel, and two fabrics of different colors can be printed in parallel at the same time, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the front perspective structure of a one-net two-color rotary screen printing unit according to an embodiment of the present invention; wherein the slurry pipe is a cross-sectional structure, the hollow arrow represents the flow direction of the slurry, and the solid arrow represents the wind direction;

[0009] Figure 2 It is a schematic side cross-sectional structural diagram of a one-net two-color rotary screen printing unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0010] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0011] like Figure 1 and Figure 2 As shown, a one-net two-color rotary screen printing unit comprises a rotary screen 1 and a scraper printing mechanism 2 located inside the rotary screen, the scraper printing mechanism 2 comprises a magnetic roller 21 and a pulp pipe 22 for supplying pulp to the rotary screen 1, the magnetic roller 21 is located on the bottom wall inside the rotary screen, both ends of the pulp pipe 22 are open ends, the pulp pipe 22 is divided into two sections of pulp supply pipes (222, 223) that are not connected to each other by a partition plate 221 arranged in the middle, the pulp pipe 22 passes through the two axial ends of the rotary screen 1, and each open end of the pulp pipe is connected to a pulp supply device (not shown) pipeline, and the two The color pastes in the pulp supply devices are different in color. The pulp pipe 22 is located at the bottom of the tube body in the round screen 1, and several pulp feeding holes 224 are arranged at intervals along its axial direction. A blowing pipe 3 is also installed in the round screen 1. One end of the blowing pipe 3 is connected with the air compression equipment 4 outside the round screen 1, and the other end of the blowing pipe 3 is bent toward the round screen bottom wall 11 below the middle of the pulp pipe 22 and an air outlet 31 opposite to the round screen bottom wall 11 is opened. The air outlet 31 of the blowing pipe is flat and contracted, and the long side 331 of the air outlet 31 is perpendicular to the projection of the axial direction of the pulp pipe 22 in the horizontal plane.

[0012] When working, first start the air compression equipment to supply air to the blowing pipe, and then the color paste enters the pulp pipe from both ends of the pulp pipe respectively, and flows to the bottom of the round screen through the self-supplied pulp hole. At this time, the compressed air ejected from the blowing port blows to the bottom wall of the round screen and then moves to both ends of the round screen, thereby blocking the pulp at both ends of the round screen from gathering in the middle, and then the magnetic roller attracted to the magnetic table prints the color paste onto the fabric through the mesh holes.

[0013] The slurry pipe described in the present invention can be welded by two sections of pipes with one end open and the other end closed. The specific processing technology is a conventional technical means in the field of mechanical processing and will not be elaborated here; the scraping workpiece is not limited to a magnetic roller and can also be a scraper. This is common knowledge in the field of rotary screen printing machines; the structure of the air compression equipment is a conventional structure in the mechanical field and will not be elaborated here.

[0014] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent process changes made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A one-net two-color rotary screen printing unit comprising a rotary screen and a scraping mechanism located inside the rotary screen, the scraping mechanism comprising a scraping workpiece and a slurry pipe for supplying slurry to the rotary screen, the scraping workpiece being located on the bottom wall inside the rotary screen, characterized in that: Both ends of the pulp pipe are open ends, and the pulp pipe is divided into two sections of pulp supply pipes that are not connected to each other by a partition arranged in the middle. The pulp pipe passes through the two axial ends of the circular screen, and each open end of the pulp pipe is connected to a pulp supply device pipe respectively. The bottom of the tube body of the pulp pipe located in the circular screen is provided with a plurality of pulp supply holes spaced along its axial direction; a blowing pipe is also installed in the circular screen, one end of the blowing pipe is connected to the air compression equipment outside the circular screen, and the other end of the blowing pipe is bent toward the bottom wall of the circular screen below the middle of the pulp pipe and is provided with an air outlet opposite to the bottom wall of the circular screen, and the air outlet of the blowing pipe is flat and contracted, and the long side of the air outlet is perpendicular to the projection of the axial direction of the pulp pipe in the horizontal plane.

2. The one-net two-color rotary screen printing unit according to claim 1, characterized in that: The scraping workpiece is a magnetic roller or a scraper.

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