Screen printing equipment

Abstract

The utility model discloses silk-screen printing equipment, which relates to the technical field of printing equipment and comprises a conveying table, a printing mechanism and a drying mechanism, the drying mechanism comprises a drying oven arranged on the table top of the conveying table, the drying oven is provided with a drying cavity used for containing printed matter to be dried, at least two heating structures distributed at intervals in the conveying direction of the conveying table are arranged in the drying cavity, and each heating structure comprises a heating base connected to the drying oven or the conveying table. An arc-shaped groove is formed in the lower end of the heating base in the length direction of the heating base, and a heating element facing the table top of the conveying table is arranged on the inner wall of the arc-shaped groove. An air outlet communicated with the drying chamber is formed in the upper end or one side of the drying oven, a ventilation pipeline is externally connected to the air outlet, and a filter part is detachably connected to the air outlet; and heating is uniform in the drying process, and waste gas generated in the drying process can be effectively purified.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a screen printing equipment. Background Art

[0002] As an important printing technology, screen printing is widely used in many industries such as electronics, packaging, and decoration, and occupies an indispensable position in modern industrial production.

[0003] In the screen printing process, post-printing drying plays a crucial role in final product quality. Traditional screen printing equipment has numerous shortcomings in this regard. Some early screen printing equipment relied solely on natural ventilation or simple heating plates to dry the ink. This extremely slow drying method severely impacted production efficiency, especially in today's rapidly growing demand for large-scale production. For example, in the screen printing of some electronic circuit boards, untimely ink drying prevents subsequent processing steps from proceeding smoothly, extending production cycles and increasing production costs.

[0004] With the development of technology, some screen printing equipment is equipped with drying devices, but they still have defects. The heating of some drying devices is uneven, which can easily cause inconsistent drying levels in different parts of the printed product. For example, when printing large advertising posters or large-area decorative materials, uneven heating may cause the edges of the printed pattern to dry out excessively, resulting in discoloration, deformation and other problems, while the center part may not dry enough, and ink viscosity will remain, affecting the overall quality and aesthetics of the product. In addition, the ventilation system design of traditional drying devices is not perfect. The harmful gases, odors and ink volatiles generated during the drying process cannot be effectively handled and are directly discharged into the workshop environment, which not only endangers the health of operators, but may also pollute the surrounding environment and violate increasingly stringent environmental protection regulations.

[0005] Therefore, it is necessary to propose an improved technical solution to solve the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0007] A screen printing device comprises a conveying platform, a printing mechanism and a drying mechanism sequentially arranged along the conveying direction of the conveying platform;

[0008] The drying mechanism includes an oven disposed on a conveyor table, the oven having a drying chamber for accommodating printed materials to be dried, at least two heating structures arranged at intervals along the conveying direction of the conveyor table, the heating structure including a heating seat connected to the oven or the conveyor table, an arc-shaped groove formed along the length direction of the heating seat and at its lower end, and a heating element disposed on the inner wall of the arc-shaped groove facing the conveyor table;

[0009] An air inlet connected to the drying chamber is provided at the upper end of the oven, a fan is externally connected to the air inlet, an opening connected to the arc-shaped groove is provided along the upper end of the heating seat, the opening corresponds to the air inlet, an air outlet connected to the drying chamber is provided at the upper end or one side of the oven, a ventilation duct is externally connected to the air outlet, and a filter is detachably connected to the air outlet.

[0010] As a further solution of the present invention: a connecting seat is protruded from the upper end of the heating seat and located at the opening, and the connecting seat is connected to the air inlet pipe.

[0011] As a further solution of the present invention: an assembly plate is fixedly provided on the inner walls on both sides of the oven, and a plurality of connecting grooves are sequentially arranged at intervals along the height direction of the assembly plate. Connecting columns are respectively extended on both sides of the heating seat, and the connecting columns are snap-fitted with any connecting groove to fix the heating seat and the assembly plate.

[0012] As a further solution of the present invention: a vertical groove is further provided on the assembly plate, and a plurality of the connecting grooves are provided with a transverse groove connected to the vertical groove, and a bayonet acting on the connecting column is formed between the connection between the transverse groove and the corresponding connecting groove.

[0013] As a further solution of the present invention: a mounting plate is detachably connected to the air outlet in the oven, the mounting plate has a cavity connected to the air outlet, the filter is arranged inside the cavity, and a ventilation hole is opened at the lower end or one side of the mounting plate to connect the cavity with the drying chamber.

[0014] As a further solution of the present invention: a side panel is detachably connected to one side of the oven.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] Compared with traditional screen printing equipment that relies solely on natural ventilation or simple heating plates, this equipment significantly accelerates the ink drying speed through the combination of a unique heating structure design and forced convection by the fan. The reasonable layout of the heating structure and the special design of the arc groove ensure that heat is evenly distributed on the surface of the printed matter, effectively solving the print quality problems caused by uneven heating in traditional drying devices. The ventilation ducts and detachable filters at the air outlet can effectively purify the exhaust gas generated during the drying process, remove harmful components, reduce pollution to the workshop environment, protect the health of operators, make the equipment comply with environmental protection regulations, and contribute to the sustainable development of the enterprise, while also enhancing the company's social image.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a structural diagram of the drying mechanism in the utility model;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the heating seat in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the assembly plate in the utility model.

[0024] The reference numerals and names in the figures are as follows:

[0025] 1. Conveyor platform; 2. Printing mechanism; 3. Drying mechanism; 4. Oven; 5. Drying chamber; 6. Heating base; 7. Arc groove; 8. Air inlet; 9. Fan; 10. Opening; 11. Air outlet; 12. Filter element; 13. Connecting base; 14. Assembly plate; 15. Connecting groove; 16. Connecting column; 17. Vertical groove; 18. Horizontal groove; 19. Bayonet; 20. Mounting plate; 21. Cavity; 22. Ventilation port; 23. Side panel. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-5 In an embodiment of the present invention, a screen printing device includes a conveying platform 1, a printing mechanism 2 and a drying mechanism 3 sequentially arranged along the transmission direction of the conveying platform 1;

[0028] The drying mechanism 3 includes an oven 4 disposed on the surface of the conveyor platform 1. The oven 4 has a drying chamber 5 for accommodating printed materials to be dried. At least two heating structures are arranged in the drying chamber 5 along the conveying direction of the conveyor platform 1 and at intervals. The heating structure includes a heating seat 6 connected to the oven 4 or the conveyor platform 1. An arc-shaped groove 7 is formed along the length direction of the heating seat 6 and at its lower end. The inner wall of the arc-shaped groove 7 is provided with a heating element facing the surface of the conveyor platform 1.

[0029] An air inlet 8 connected to the drying chamber 5 is provided at the upper end of the oven 4, and a fan 9 is externally connected to the air inlet 8. An opening 10 connected to the arc-shaped groove 7 is provided along the upper end of the heating seat 6, and the opening 10 corresponds to the air inlet 8. An air outlet 11 connected to the drying chamber 5 is provided at the upper end or one side of the oven 4, and a ventilation duct is externally connected to the air outlet 11, and a filter element 12 is detachably connected.

[0030] In the technical solution of the present invention, in terms of overall structural layout, the drying oven 4 is directly placed on the table top of the conveying platform 1. This design allows the printed matter to enter the drying chamber 5 of the drying oven 4 immediately after the printing process is completed, greatly shortening the time interval from the completion of printing to the start of drying of the printed matter, avoiding the problem of delayed drying of the ink or quality affected by environmental factors during the transfer process, and laying the foundation for efficient drying;

[0031] In order to solve the key problem of heating uniformity, at least two heating structures are carefully arranged in the drying chamber 5 and arranged at intervals along the transmission direction of the conveyor table 1. The core component of each heating structure, the heating seat 6, adopts a unique arc groove 7 design. The inner wall of the arc groove 7 at the lower end along its length is equipped with a heating element facing the surface of the conveyor table 1. This arc groove 7 structure has a sophisticated optical and thermal principle basis, similar to the focusing effect of a parabolic reflector, which can effectively converge and evenly reflect the heat generated by the heating element, so that the heat is radiated to the surface of the printed matter below in a more uniform and concentrated manner. For example, after the heating element (such as a heating wire) is powered on and heated, the heat is dissipated to the surroundings, and the inner wall of the arc groove 7 reflects and integrates this heat. This avoids disorderly diffusion of heat, thereby ensuring that printed products at different locations receive stable and uniform heat radiation. When the printed products enter the oven 4 along the conveyor 1, the multiple heating structures, based on their spaced-apart positions, provide all-round heat coverage to the printed products from different areas, forming a coordinated heating network. This layout can flexibly adapt to printed products of different sizes and shapes, whether they are narrow electronic circuit boards or large decorative panels. By adjusting the power of each heating structure and combining it with the airflow guidance of the fan 9, precise and uniform heating of all parts of the printed product is achieved, effectively eliminating quality defects such as deformation and discoloration of the printed product caused by local overheating, and ink viscosity residue caused by insufficient local drying.

[0032] The fan 9 is externally connected to the air inlet 8 at the upper end of the drying oven 4. When the fan 9 is started, the external air is continuously introduced into the drying chamber 5 of the drying oven 4 under the suction force of the fan 9. This incoming air flows into the interior of the arc groove 7 along the opening 10 at the upper end of the heating base 6 that is connected to the arc groove 7. During this process, the air fully contacts and quickly mixes with the high heat generated by the heating element, forming a hot air flow with a higher temperature and a faster flow rate. This greatly accelerates the transfer rate of heat from the hot air flow to the surface of the printed matter, allowing the solvent molecules in the ink to obtain sufficient energy to quickly evaporate and leave the printed matter.

[0033] The air outlet 11 is set at the upper end or one side of the drying oven 4 and is connected to the ventilation duct and the detachable filter 12. The exhaust gas containing solvent vapor, odor and possible harmful gases discharged from the drying chamber 5 enters the ventilation duct under the pressure of the fan 9. The ventilation duct provides a directional channel for the exhaust gas to ensure that the exhaust gas can be discharged from the drying oven 4 system in an orderly manner. The filter 12 detachably connected to the air outlet 11 is the key line of defense for protecting the environment and personnel health. The filter 12 usually adopts a multi-layer composite structure. For example, it first passes through a layer of primary effect. The filter cotton can intercept larger particulate impurities in the exhaust gas, such as pigment particles in ink, dust, etc.; followed by the activated carbon adsorption layer. The activated carbon has a rich microporous structure and a huge specific surface area, which can effectively remove odor molecules, organic volatiles and some harmful gases in the exhaust gas through physical adsorption, such as benzene and formaldehyde; finally, there will be a layer of high-efficiency HEPA filter, which can capture tiny suspended particles, including some extremely fine ink particles and microorganisms that still remain after the previous treatment, to ensure that the discharged gas meets environmental emission standards.

[0034] In summary, compared with traditional screen printing equipment that relies solely on natural ventilation or simple heating plates, this equipment significantly accelerates the ink drying speed through the unique heating structure design combined with the forced convection of the fan 9. The reasonable layout of the heating structure and the special design of the arc groove 7 ensure that the heat is evenly distributed on the surface of the printed matter, effectively solving the print quality problem caused by uneven heating of traditional drying devices. The ventilation duct at the air outlet 11 and the detachable filter 12 can effectively purify the exhaust gas generated during the drying process, remove harmful components, reduce pollution to the workshop environment, protect the health of operators, make the equipment comply with environmental protection regulations, and benefit the sustainable development of the enterprise, while also enhancing the social image of the enterprise.

[0035] In the embodiment of the present invention, a connecting seat 13 is protruded from the upper end of the heating seat 6 and located at the opening 10 , and the connecting seat 13 is connected to the air inlet 8 pipe.

[0036] The presence of the connecting seat 13 forms an optimized airflow transmission path between the air inlet 8 and the opening 10 of the heating seat 6, and structurally constructs a stable and sealed airflow channel, so that the air introduced from the outside by the fan 9 can be accurately introduced into the arc groove 7 of the heating seat 6, thereby acting on the printed matter delivered from the printing mechanism 2. It can be understood that the arc groove 7 is a through groove with an opening 10 at the lower end.

[0037] In the embodiment of the present invention, an assembly plate 14 is fixed to the inner walls of both sides of the oven 4, and a plurality of connecting grooves 15 are sequentially spaced along the height direction of the assembly plate 14. Connecting posts 16 are respectively extended from both sides of the heating seat 6. The connecting posts 16 are engaged with any of the connecting grooves 15 to securely connect the heating seat 6 to the assembly plate 14.

[0038] The assembly plate 14 is further provided with a vertical slot 17 , and the plurality of connecting slots 15 are provided with a transverse slot 18 communicating with the vertical slot 17 . The connection between the transverse slot 18 and the corresponding connecting slot 15 forms a bayonet 19 acting on the connecting column 16 .

[0039] During the assembly process, the connecting posts 16 on both sides of the heating seat 6 are first aligned with the vertical grooves 17 on the assembly plate 14. Since the vertical grooves 17 are continuous in the height direction, the connecting posts 16 can be easily inserted into the vertical grooves 17 at a suitable height position. Then, by translating the heating seat 6, the connecting posts 16 slide along the transverse grooves 18 into the connecting grooves 15 connected thereto. At this time, the bayonet 19 formed at the connection between the transverse grooves 18 and the connecting grooves 15 can effectively snap the connecting posts 16 into the supporting connecting grooves 15, thereby firmly fixing the heating seat 6 on the assembly plate 14. The design principle of this snap-fit ​​is based on the limit and locking mechanism in the mechanical structure, and utilizes the shape and position relationship of the connecting grooves 15, the vertical grooves 17 and the transverse grooves 18 to achieve accurate positioning and stable fixation of the heating seat 6 in the oven 4.

[0040] Since the connecting grooves 15 are arranged in sequence along the height direction of the assembly plate 14, the height of the heating seat 6 is adjustable. In actual production, printed products of different types, thicknesses or materials may require different heating distances and angles. By selecting connecting grooves 15 at different height positions to fix the heating seat 6, the height of the heating seat 6 relative to the printed product can be conveniently adjusted.

[0041] In an embodiment of the present invention, a mounting plate 20 is detachably connected to the air outlet 11 in the oven 4. The mounting plate 20 has a cavity 21 connected to the air outlet 11. The filter element 12 is disposed in the cavity 21. A vent 22 is provided at the lower end or one side of the mounting plate 20 to connect the cavity 21 to the drying chamber 5.

[0042] A detachable mounting plate 20 is provided at the air outlet 11 in the oven 4, and the filter element 12 is built into the cavity 21 of the mounting plate 20. This design constructs an integrated structure specifically for exhaust gas treatment. When the hot air in the oven 4 carries solvent vapor, odor and harmful gases and flows toward the air outlet 11, it will first enter the cavity 21 of the mounting plate 20 through the vent 22 at the lower end or one side of the mounting plate 20, and fully contact with the built-in filter element 12, thereby achieving the purpose of purifying the exhaust gas generated during the drying process, removing harmful components, and reducing pollution to the workshop environment. Furthermore, the detachable connection method of the mounting plate 20 makes it easy to remove the mounting plate 20 for operation when the filter element 12 needs to be replaced or cleaned, and its connection method can be a conventional screw connection fastening method.

[0043] In the embodiment of the present invention, a side panel 23 is detachably connected to one side of the oven 4 .

[0044] The oven 4 is designed with a detachable side panel 23 on one side, mainly for the convenience of equipment maintenance, inspection and replacement of internal components. During the operation of the screen printing equipment, the heating structure, ventilation duct, filter element 12 and other components inside the oven 4 may malfunction or require regular maintenance and cleaning. When these components need to be operated, the detachable side panel 23 allows maintenance personnel to directly access the internal space of the oven 4 without the need for complicated disassembly or destruction of the entire oven 4 structure. Its connection method can be a conventional screw connection fastening method.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A screen printing device, characterized in that: It includes a conveying platform, a printing mechanism and a drying mechanism arranged in sequence along the conveying direction of the conveying platform; The drying mechanism includes an oven disposed on a conveyor table, the oven having a drying chamber for accommodating printed materials to be dried, at least two heating structures arranged at intervals along the conveying direction of the conveyor table, the heating structure including a heating seat connected to the oven or the conveyor table, an arc-shaped groove formed along the length direction of the heating seat and at its lower end, and a heating element disposed on the inner wall of the arc-shaped groove facing the conveyor table; An air inlet connected to the drying chamber is provided at the upper end of the oven, a fan is externally connected to the air inlet, an opening connected to the arc-shaped groove is provided along the upper end of the heating seat, the opening corresponds to the air inlet, an air outlet connected to the drying chamber is provided at the upper end or one side of the oven, a ventilation duct is externally connected to the air outlet, and a filter is detachably connected to the air outlet.

2. The screen printing device according to claim 1, characterized in that: A connecting seat is protruded from the upper end of the heating seat and located at the opening, and the connecting seat is connected to the air inlet pipe.

3. The screen printing device according to claim 1, characterized in that: The inner walls on both sides of the oven are fixed with assembly plates, and a plurality of connecting grooves are arranged in sequence along the height direction of the assembly plates. Connecting columns are respectively extended on both sides of the heating seat, and the connecting columns are engaged with any connecting groove to fix the heating seat and the assembly plate.

4. The screen printing device according to claim 3, characterized in that: The assembly plate is further provided with a vertical slot, and a plurality of the connecting slots are provided with a transverse slot connected to the vertical slot, and a bayonet for acting on the connecting column is formed between the transverse slot and the corresponding connecting slot.

5. The screen printing device according to claim 1, characterized in that: A mounting plate is detachably connected to the air outlet in the oven, and has a cavity connected to the air outlet. The filter is disposed in the cavity, and a ventilation hole is provided at the lower end or one side of the mounting plate to connect the cavity with the drying chamber.

6. The screen printing device according to any one of claims 1 to 5, characterized in that: A side panel is detachably connected to one side of the oven.

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