Air draft device for digital printing machine
By introducing a receiving tray and filter screen structure into the exhaust device of the digital printing machine, the problem of impurities being drawn into the airflow channel was solved, achieving high-quality printing results and stable operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN DADI COMPUTER EMBROIDERY CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-05
AI Technical Summary
The exhaust system of existing digital printing machines can easily draw fiber debris and other impurities into the airflow channel during the exhaust process, causing the impurities to adhere to the uncured printed layer, affecting the clarity of the pattern and the feel of the fabric.
A ventilation device for a digital printing machine is designed, comprising a fan, a filter frame, a filter screen, and a receiving tray installed on a drying chamber. The receiving tray catches impurities to prevent them from falling onto the fabric, while intervals are provided to allow airflow.
It effectively prevents impurities from adhering to the fabric, improves printing quality, ensures pattern clarity and fabric feel, has a stable structure, and is easy to use.
Smart Images
Figure CN224194338U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of digital printing machine technology, and in particular to an exhaust device for a digital printing machine. Background Technology
[0002] Digital printing machines are modern textile printing equipment based on computer digital control technology. They use high-precision nozzles to directly spray water-based or solvent-based inks onto the surface of textiles to form complex patterns. Compared to traditional screen printing, digital printing machines offer advantages such as no need for plate making, high flexibility, and high color fidelity, and are widely used in clothing, home textiles, and decorative materials. Their workflow typically includes pattern design, substrate pretreatment, inkjet printing, drying and color fixing, and post-processing, with the drying stage playing a crucial role in the quality of the finished product.
[0003] After printing, the uncured ink needs to be rapidly dried using a high-temperature drying system (such as infrared heating or hot air circulation) to achieve physical or chemical curing. However, during the high-temperature drying process, organic solvents, volatile organic compounds (VOCs), and some dye components in the ink will evaporate due to heat, producing toxic and harmful gases containing benzene compounds, formaldehyde, and other substances. If these gases are not removed in time, they will not only pollute the production environment and endanger the health of operators, but may also cause the printed fabric to reabsorb pollutants, resulting in color distortion or surface defects.
[0004] To eliminate the aforementioned problems, existing technologies commonly employ forced ventilation systems to exhaust air from the drying area. Conventional ventilation systems typically consist of a centrifugal fan, ventilation ducts, and external exhaust ports, using negative pressure to directly draw harmful gases away from the work area. However, in actual production environments, textile workshops commonly contain suspended impurities such as fiber debris and thread ends, especially near high-speed printing lines where airflow disturbances exacerbate the diffusion of these impurities. During the forced ventilation process of the drying area, the strong suction generated by the ventilation system easily draws impurities from the environment into the airflow channels. As these impurities move with the airflow, some may remain above the fabric transport path, or even come into contact with the incompletely cured printed surface. These impurities easily adhere to the damp printed layer, forming visible spots or uneven marks, directly affecting the clarity of the pattern and the feel of the fabric. Utility Model Content
[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide a ventilation device for a digital printing machine that can catch impurities, is easy to use, and has a stable structure.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0007] A ventilation device for a digital printing machine is installed on a drying chamber. The drying chamber has a liftable top cover, on which a ventilation fan is mounted. The exhaust end of the ventilation fan is connected to an exhaust duct, and the exhaust end of the ventilation fan is connected to an exhaust duct. The opening of the exhaust duct is located inside the drying chamber. A ventilation hood is fixedly installed downward on the top cover. A filter frame is installed downward on the top cover via a connecting structure. A filter screen is fixedly installed inside the filter frame. A receiving plate is fixed downward on the filter frame via a connecting rod. The receiving plate has a recessed receiving groove, the size of which is larger than the size of the filter screen. A gap is provided between the receiving plate and the ventilation hood.
[0008] In this way, the exhaust system is installed on the drying chamber to promptly remove toxic and harmful gases generated during the drying process. During exhaust, the exhaust fan, typically a centrifugal fan, is activated. The fan draws airflow from the drying chamber, carrying the toxic and harmful gases through an exhaust duct. This duct is connected to a gas treatment device, which processes the gases—a standard treatment system. During the exhaust process, impurities are carried by the airflow to the filter screen. A receiving tray is installed to catch impurities reaching the filter screen, preventing them from falling onto the fabric and ensuring better printing quality. A gap is created between the receiving tray and the exhaust hood to facilitate airflow.
[0009] Preferably, the connection structure includes a column fixedly installed on the filter frame, the upper end of the column is provided with an internal threaded hole, the top cover is provided with a relief hole through the internal threaded hole, the bolt passes through the relief hole and is connected to the internal threaded hole, and the end of the bolt is pressed against the top cover.
[0010] Preferably, the lower center of the receiving plate protrudes downwards.
[0011] Preferably, the receiving plate is provided with a guide slope in the circumferential direction.
[0012] Preferably, two lifting cylinders are fixedly installed on both sides of the drying box, and the two sides of the top cover extend to the outside of the drying box. The cylinder rods of the lifting cylinders are set upward and fixedly connected to the top cover.
[0013] Preferably, the lower opening of the exhaust hood is larger than the upper opening.
[0014] In summary, the exhaust device for this digital printing machine has the advantages of being able to catch impurities, being easy to use, and having a stable structure. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of an exhaust device for a digital printing machine according to the present invention.
[0016] Figure 2 for Figure 1 A schematic diagram of the top cover being raised in the exhaust device of the digital printing machine.
[0017] Figure 3 for Figure 1 A sectional view.
[0018] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.
[0019] Figure 5 This is a schematic diagram showing the connection status of the filter screen and the receiving tray.
[0020] Figure 6 for Figure 5 A diagonally upward view. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0022] like Figure 1-6 As shown, a ventilation device for a digital printing machine is installed on a drying chamber 1. The drying chamber has a liftable top cover 11, on which a ventilation fan 12 is installed. The exhaust end of the ventilation fan is connected to an exhaust duct 13, and the exhaust end of the ventilation fan is connected to an exhaust duct 14. The opening of the exhaust duct is located inside the drying chamber. A ventilation hood 15 is fixedly installed downward on the top cover. A filter frame 16 is installed downward on the top cover via a connecting structure. A filter screen 17 is fixedly installed inside the filter frame. A receiving plate 19 is fixedly installed downward on the filter frame via a connecting rod 18. The receiving plate has a recessed receiving groove 2, the size of which is larger than the size of the filter screen. A gap is provided between the receiving plate and the ventilation hood.
[0023] In this way, the exhaust system is installed on the drying chamber to promptly remove toxic and harmful gases generated during the drying process. During exhaust, the exhaust fan, typically a centrifugal fan, is activated. The fan draws airflow from the drying chamber, carrying the toxic and harmful gases through an exhaust duct. This duct is connected to a gas treatment device, which processes the gases—a standard treatment system. During the exhaust process, impurities are carried by the airflow to the filter screen. A receiving tray is installed to catch impurities reaching the filter screen, preventing them from falling onto the fabric and ensuring better printing quality. A gap is created between the receiving tray and the exhaust hood to facilitate airflow.
[0024] In implementation, the connection structure includes a column 21 fixedly installed on the filter frame. The upper end of the column has an internally threaded hole 22. A clearance hole is provided through the top cover opposite the internally threaded hole. A bolt passes through the clearance hole and connects to the internally threaded hole, with the end of the bolt pressed against the top cover. The filter frame is installed by connecting it to the column with bolts, facilitating disassembly and installation.
[0025] In practice, the lower center of the receiving plate protrudes downwards, giving it a guide slope. Impurities in contact with the receiving plate are driven upwards along the guide slope by the airflow and flow to the filter screen.
[0026] In practice, the receiving tray is provided with a guiding slope 24 in the circumferential direction. This facilitates the guidance of impurities, allowing them to reach the filter screen more quickly.
[0027] In practice, two lifting cylinders 25 are fixedly installed on both sides of the drying chamber. The top cover extends to the outside of the drying chamber on both sides. The cylinder rods of the lifting cylinders are set upward and fixedly connected to the top cover. After a period of use, impurities are adsorbed on the filter screen. The lifting cylinders then move the top cover upward, causing the filter frame and support tray to move to the top of the drying chamber. After that, the filter screen on the filter frame and the impurities in the support tray can be cleaned.
[0028] In practice, the lower opening of the exhaust hood is larger than the upper opening. This facilitates the concentration of airflow, allowing toxic and harmful gases to quickly reach the exhaust duct through the guide of the exhaust hood.
[0029] Specifically, a mesh conveyor belt 26 for conveying the fabric and a heating component for heating the fabric are installed inside the drying chamber. The heating component can be a hot air blower installed at the lower end of the drying chamber, which is an existing structure.
[0030] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A ventilation device for a digital printing machine, installed on a drying chamber (1), the drying chamber (1) having a liftable top cover (11), a fan (12) installed on the top cover (11), an exhaust pipe (13) connected to the exhaust end of the fan (12), an exhaust pipe (14) connected to the exhaust end of the fan (12), the opening of the exhaust pipe (14) being located inside the drying chamber (1), and a ventilation hood (15) fixedly installed downward on the top cover (11); characterized in that, The top cover (11) is connected to a filter frame (16) which is installed downwards via a connecting structure. A filter screen (17) is fixedly installed inside the filter frame (16). A receiving plate (19) is fixedly installed downwards via a connecting rod (18). The receiving plate (19) is recessed to form a receiving groove (2). The size of the receiving groove (2) is larger than the size of the filter screen (17). There is a gap between the receiving plate (19) and the exhaust hood (15).
2. The exhaust device for a digital printing machine according to claim 1, characterized in that, The connection structure includes a column (21) fixedly installed on the filter frame (16). The upper end of the column (21) is provided with an internal threaded hole (22). The top cover (11) is provided with a relief hole through the internal threaded hole (22). The bolt passes through the relief hole and is connected to the internal threaded hole (22). The end of the bolt is pressed against the top cover (11).
3. The exhaust device for a digital printing machine according to claim 2, characterized in that, The receiving plate (19) is provided with a downward protrusion at the lower center.
4. The exhaust device for a digital printing machine according to claim 1, characterized in that, The receiving plate (19) is provided with a guide slope (24) in the circumferential direction.
5. The exhaust device for a digital printing machine according to claim 1, characterized in that, Two lifting cylinders (25) are fixedly installed on both sides of the drying box (1). The two sides of the top cover (11) extend to the outside of the drying box (1). The cylinder rod of the lifting cylinder (25) is set upward and fixedly connected to the top cover (11).
6. The exhaust device for a digital printing machine according to claim 1, characterized in that, The lower opening of the exhaust hood (15) is larger than the upper opening.