A type of rotary screen scraper

Abstract

This utility model relates to the field of printing squeegee technology, and in particular to a rotary screen squeegee; comprising: an injection tube with a plurality of injection holes; a blade body disposed on one side of the injection tube; and a material receiving tray fixed to the lower side of the injection tube, with the injection holes facing the material receiving tray and disposed below the blade body; this utility model allows the ink paste to preferentially flow down from this side onto the rotary screen, and the squeegee spreads the ink paste evenly and presses it onto the substrate, while excess ink paste is blocked by the squeegee and falls onto the material receiving tray, and then flows back onto the rotary screen, thus realizing ink paste recycling.

Description

Technical Field

[0001] This utility model relates to the field of printing squeegee technology, and in particular to a rotary screen squeegee. Background Technology

[0002] Rotary screen printing, as a highly efficient continuous printing process, operates on the following core principle: A hollow cylindrical screen serves as the pattern carrier. A paste-like ink containing dye and glue is filled into the screen. Pressure is applied to the inner wall of the screen using a squeegee, forcing the ink paste out through the mesh and transferring it to the surface of the substrate, such as fabric or film, ultimately forming the pre-set pattern. During this process, the method of ink paste supply, its uniformity of distribution, and the handling of excess ink directly determine the clarity, colorfastness, and economic efficiency of the printed pattern, making them key factors affecting the quality of rotary screen printing.

[0003] Currently, rotary screen printing equipment generally suffers from the following technical defects regarding the supply and coating structure of the pigments inside the rotary screen:

[0004] The doctor blade generates a large amount of excess pigment during the coating process. The existing structure lacks an effective recycling mechanism, and the excess pigment often drips directly onto the equipment frame or the ground. This not only causes a large waste of pigment raw materials (especially for high-value functional dyes), but also contaminates equipment parts (such as rotary screen bearings and transmission mechanisms), increasing the frequency and cost of equipment cleaning and maintenance. At the same time, the pigment may dry and clog the rotary screen mesh, shortening the service life of the rotary screen.

[0005] Therefore, there is an urgent need for a rotary screen doctor blade structure that can achieve uniform distribution, efficient recovery, and stable flow of pigment paste, in order to solve the pain points of existing technologies and meet the needs of the rotary screen printing industry for high-quality and low-loss production. Utility Model Content

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a rotary screen scraper capable of recovering pigment paste.

[0007] In view of this, the present invention provides a rotary screen scraper, comprising:

[0008] The injection tube has several injection holes.

[0009] The blade is located on one side of the injection tube;

[0010] The material receiving tray is fixed to the lower side of the injection pipe, with the injection hole facing the material receiving tray and located below the cutter body.

[0011] Furthermore, it also includes:

[0012] The mounting slot has an interference fit for a mounting rod, and the cutter body is fixedly mounted on the top of the mounting rod, with the cutter body abutting against the wall of the mounting slot.

[0013] Furthermore, it also includes a reinforcing rib plate, which has an L-shaped cross-section, with one end connected to the material receiving plate and the other end connected to the injection pipe.

[0014] Furthermore, the injection hole is positioned higher than the material receiving plate.

[0015] Furthermore, the inner bottom surface of the material receiving tray is flat.

[0016] Furthermore, the bottom surface of the material receiving tray is a plane, and it is on the same plane as the bottom surface of the reinforcing rib plate.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model utilizes the method of allowing the pigment paste to flow down from this side onto the rotary screen first, and then spreading and pressing the pigment paste onto the substrate using a squeegee. Excess pigment paste is blocked by the squeegee and falls onto the substrate tray, and then flows back onto the rotary screen, thus achieving pigment paste recycling.

[0019] 2. This utility model is installed by welding a mounting groove to the side of the injection pipe near the blade body. The mounting groove is a channel-shaped iron. The blade body is fixed to the top surface of the mounting rod. The mounting rod is placed in the mounting groove, and the blade body abuts against the top surface of the mounting groove. When the blade body scrapes off excess color paste and flows onto the mounting rod, the color paste is more easily directed to the receiving tray because the cylindrical surface of the mounting rod is curved. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0022] The markings in the diagram are as follows:

[0023] 1. Injection pipe; 2. Injection hole; 3. Blade body; 4. Material receiving tray; 5. Mounting groove; 6. Mounting rod; 7. Reinforcing rib plate. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0025] Example 1:

[0026] This embodiment provides a rotary screen scraper, including:

[0027] Injection tube 1, with a plurality of injection holes 2 provided on injection tube 1;

[0028] The blade body 3 is located on one side of the injection tube 1;

[0029] The material receiving plate 4 is fixed on the lower side of the liquid injection pipe 1, and the liquid injection hole 2 faces the material receiving plate 4 and is located below the cutter body 3.

[0030] In rotary screen printing, the location of dye (or printing paste, usually a paste-like mixture containing dye, paste, etc.) addition is directly related to the structure of the rotary screen and the feeding system. The core is to deliver the dye into the interior of the rotary screen. Typically, the rotary screen is a hollow cylindrical tube. During printing, the dye needs to be filled inside the rotary screen, and then squeezed out of the mesh by a squeegee and transferred to the external substrate to form a pattern. In this embodiment, the screen is installed inside the rotary screen, with the squeegee 3 abutting against the inner wall of the screen. Both ends of the injection tube 1 can be injection ports, or one end can be sealed and the other end can be an injection port. Several uniform injection ports are formed on the side wall of the injection tube 1. The ink injection hole 2 of the cloth allows the ink to be evenly distributed on the substrate tray 4. When the substrate tray 4 is full, the height of the side of the substrate tray 4 closest to the cylindrical screen wall is lower than the other sides. The ink will preferentially flow down from this side onto the cylindrical screen and be spread evenly and pressed onto the substrate by the squeegee. Excess ink will be blocked by the squeegee and fall onto the substrate tray 4, and then flow back onto the cylindrical screen. This can prevent uneven distribution of ink. The substrate tray 4 can be rearranged to readjust the ink surface and then flow down uniformly. Due to the effect of liquid tension, a guide groove can be opened on the lower side of the substrate tray 4 to increase the guidance of the ink and make the ink more evenly distributed.

[0031] Example 2:

[0032] This embodiment provides a rotary screen scraper, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0033] Also includes:

[0034] Mounting slot 5, in which mounting rod is interference-fitted, and cutter body 3 is fixedly mounted on the top of mounting rod, with cutter body 3 abutting against the groove wall of mounting slot 5.

[0035] The mounting groove 5 is welded to the side of the injection pipe 1 near the blade 3. The mounting groove 5 is a channel-shaped iron. The blade 3 is fixed to the top surface of the mounting rod. The mounting rod 6 is placed in the mounting groove 5. The blade 3 abuts against the top surface inside the mounting groove 5. When the blade 3 scrapes off excess color paste and it flows onto the mounting rod 6, the color paste is more easily directed to the receiving tray 4 because the cylindrical surface of the mounting rod is curved.

[0036] Furthermore, when the circular mesh is reversed, the cutter body 3 can swing away from the circular mesh along with the installed mounting rod, preventing damage to the circular mesh structure.

[0037] Example 3:

[0038] This embodiment provides a rotary screen scraper, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0039] The reinforcing rib 7 has an L-shaped cross-section, with one end connected to the material receiving plate 4 and the other end connected to the injection pipe 1.

[0040] The reinforcing rib 7 is an angle steel, with one side welded to the material receiving plate 4 and the other side welded to the end of the injection pipe 1 away from the scraper, so that the material receiving plate 4 can hold more color paste, making the structure of the material receiving plate 4 stronger and less prone to deformation.

[0041] The position of injection hole 2 is higher than that of the material receiving plate 4.

[0042] This makes it easier for the color paste to flow into the receiving tray 4.

[0043] The inner bottom surface of the material receiving tray 4 is flat.

[0044] The bottom surface of the material receiving plate 4 is a plane, and it is on the same plane as the bottom surface of the reinforcing rib plate 7.

[0045] This makes the structure of the material tray 4 more stable, enabling it to withstand denser and heavier pigments.

[0046] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms fall within the scope of protection of this application.

Claims

1. A rotary doctor blade characterized in that, include: Injection tube (1), with several injection holes (2) on the injection tube (1); The blade (3) is located on one side of the injection tube (1); The material receiving plate (4) is fixed on the lower side of the liquid injection pipe (1), and the liquid injection hole (2) faces the material receiving plate (4) and is located below the knife body (3).

2. A rotary doctor blade according to claim 1, wherein Also includes: The mounting slot (5) has an interference fit for mounting rod (6), and the blade (3) is fixedly mounted on the top of the mounting rod (6). The blade (3) abuts against the groove wall of the mounting slot (5).

3. A rotary doctor blade according to claim 1, wherein It also includes a reinforcing rib (7), which has an L-shaped cross section, with one end connected to the material receiving plate (4) and the other end connected to the injection pipe (1).

4. A rotary doctor blade according to claim 1, wherein The position of the injection hole (2) is higher than that of the material receiving plate (4).

5. A rotary doctor blade according to claim 1 wherein, The inner bottom surface of the material receiving tray (4) is flat.

6. A rotary doctor blade according to claim 3, wherein The bottom surface of the material receiving plate (4) is a plane and is on the same plane as the bottom surface of the reinforcing rib plate (7).

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