Screen printing machine with positioning and drying functions

Abstract

The invention relates to the technical field of printing machines, in particular to a screen printing machine with positioning and drying functions, the screen printing machine comprises a base, a sealing cover, a lifting moving mechanism and a fixing seat, and the sealing cover and the lifting moving mechanism are oppositely arranged above the base; compared with an existing screen printing machine, the screen printing machine is provided with the sealing frame, so that the steps of pretreatment, printing, drying and the like can be synchronously carried out, and then the working efficiency is improved. By means of the suction holes, the area, close to the suction holes, of the materials can be prevented from being sunken, and therefore it is guaranteed that ink can be evenly and completely conveyed to the surfaces of the materials; the materials printed with the ink can be dried through the fixing bases on the basis that it is guaranteed that the materials do not make contact with the external environment; and hot air after the ink is dried and waste gas generated when the ink is dried are continuously exhausted.

Description

Technical Field

[0001] The invention relates to the technical field of printing machines, in particular to a screen printing machine with positioning and drying functions. Background Art

[0002] A screen printer is a device commonly used in the printing industry. It transfers ink, paint or pigment to the printed object through the openings on the screen. This printing technology is suitable for printing on flat and curved surfaces, and is commonly used in making logos, posters, T-shirts, and other products. Current screen printers usually include a screen frame, a scraper, a printing table and other components.

[0003] Current screen printing machines usually use vacuum suction cups as a fixing mechanism for fixing printed materials, such as the patents "Announcement No. CN108146059B Fully Automatic Screen Printing Machine" and "CN118046666A A Flat Screen Screen Printing Machine". However, in actual use, if the printed material is a flexible and thin material, then the suction hole attachment of the printed material often appears concave when it is adsorbed by the empty suction cup. During the printing process, the material in the concave part of the printed material may not be in direct contact with the screen, which may cause the printing ink to not be evenly covered or completely transferred to the printing substrate, thereby causing the product pattern to be distorted; finally, after each printing of the current screen printing machine, the staff needs to remove the printed material from the vacuum suction cup and place it in a dryer to dry the ink, which leads to low overall production efficiency. Summary of the invention

[0004] The object of the present invention is to provide a screen printing machine with positioning and drying functions to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a screen printing machine with positioning and drying functions, the screen printing machine includes a base, a sealing cover, a lifting and moving mechanism and a fixed seat, the sealing cover and the lifting and moving mechanism are relatively arranged above the base, the lifting and moving mechanism is provided with a horizontal moving mechanism on the side close to the sealing cover, the horizontal moving mechanism is provided with an ink scraping mechanism and a clamping frame on the side close to the sealing cover, a fixed frame is provided at the middle position of the clamping frame, a screen is provided at the middle position of the fixed frame, a turntable and a servo motor (not shown in the figure) are provided inside the base, and the servo motor and The turntables are connected by a gear assembly, and the fixed seats are provided with four groups. The four groups of fixed seats are arranged in a ring shape above the turntable, and the materials are fixed by the fixed seats. The gear assembly includes a first gear and a second gear. The first gear is fixedly installed on the outer side of the turntable, and the second gear is fixedly installed on the main shaft of the servo motor. The servo motor drives the turntable to rotate through the gear assembly, so that the four groups of fixed seats can pass directly under the wire mesh in sequence. In the present invention, a group of bosses are provided on each group of the fixed seats. When one group of the fixed seats is located directly under the wire mesh, the fixed frame and the bosses on the fixed seats are moved by the lifting and moving mechanism. The ink on the screen is then contacted, and then the ink scraping mechanism is used to print the ink on the material surface. Compared with the current screen printing machine, the present invention is provided with a group of cylinders under each group of the fixed seats, and the fixed seats are driven to rise and fall on the turntable by the cylinders. At the same time, a sealing disk is provided inside the sealing cover, and a first air cavity and a second air cavity are provided inside the sealing disk. The lower ends of the first air cavity and the second air cavity are both provided with through holes. A purification component and a drying component are provided inside the base, and the purification component is connected to the first air cavity, and the drying component is connected to the second air cavity. Before working, the present invention needs to place the material away from the screen. The servo motor and the turntable are then used to make the material pass through the bottom of the first air cavity, the bottom of the screen and the bottom of the second air cavity in sequence. When the material passes through the bottom of the first air cavity, a group of suction is generated by the purification component to pre-treat the unprinted material to avoid impurities on the surface of the material, so that the quality of the printed product is poor. When the material passes through the bottom of the screen, the cylinder drives the fixed seat to move up to facilitate the contact between the fixed frame and the boss on the fixed seat. When printing is completed, when the material passes through the bottom of the second air cavity, hot air is delivered to the material printed with ink through the drying component, thereby achieving the purpose of drying.

[0006] Furthermore, the purification component includes an air inlet cavity and a first fan, and the drying component includes a heating element. The air inlet end of the first fan is connected to the air inlet cavity, and the air outlet end of the first fan is connected to the second air cavity through the heating element and the air inlet channel. A filter element is arranged inside the air inlet cavity, one end of the filter element is connected to the external environment through the air inlet hole, and the other end of the filter element is connected to the first air cavity through the air outlet channel. When the unprinted material is located below the first air cavity, the gas in the first air cavity and the impurities carried on the surface of the material are sucked away by the first fan, so as to avoid product defects. When the material brushed with ink is located below the second air cavity, the gas in the first air cavity and the external gas are transported to the heating element for heating through the first fan, and then the hot air flows into the second air cavity to dry the material printed with ink. The present invention is provided with four groups of fixed seats. Each time it works, except for a group of fixed seats far away from the screen, there are materials on the remaining three groups of fixed seats. Through the above technical scheme, when the first fan is working, it can simultaneously pre-treat and dry the materials under the first air cavity and the second air cavity, which improves the work efficiency on the one hand, and achieves the purpose of multiple uses of one machine on the other hand, reducing the cost of the equipment.

[0007] Furthermore, an infrared heating lamp is provided in the second air cavity to facilitate the staff to select the drying method according to the thickness of the ink printed on the surface of the material. A humidity detector (not shown in the figure) is provided on the outside of the base. The filter element provided in the present invention has the function of dehumidifying and filtering impurities in the air. The humidity detector detects whether the humidity of the external environment is within the rated humidity, so that the filter element can choose whether to turn on the dehumidification function according to the external humidity conditions, thereby avoiding the dehumidification area of ​​the filter element from being in contact with the external environment for a long time and thus reducing its performance.

[0008] Furthermore, a positioning platform is provided at the bottom end of the fixed frame, and a groove is provided at the bottom end of the positioning platform, and the boss cooperates with the groove. When the material in the present invention passes under the screen, the cylinder drives the fixed seat to move up, and at the same time the lifting and moving mechanism drives the fixed frame to descend. When the boss is inserted into the groove, it means that the position of the material is correct. When the boss cannot be inserted into the groove, it means that the rotation angle of the turntable is deviated. Through the above technical solution, it is convenient for the staff to repair the equipment in time to avoid inaccurate printing area.

[0009] Furthermore, a plurality of groups of negative pressure grooves are arranged at the upper inner end of the fixed seat, a group of telescopic grooves are arranged below each group of the negative pressure grooves, a group of sealing frames are arranged inside each group of the negative pressure grooves, a group of second electromagnets are arranged in each group of the telescopic grooves, one end of the sealing frame is located in the negative pressure groove and is wound with a spring, the other end of the sealing frame is located in the telescopic groove and is magnetic, a second fan is arranged at the lower inner end of the fixed seat, the second fan is connected to the plurality of groups of negative pressure grooves, and when the present invention is working, the plurality of groups of second electromagnets have two working states, the first working state: when the material is placed on the fixed seat, the second electromagnet located directly below the material is turned on and generates a group of magnetic fields that attract the sealing frame, at which time the sealing frame moves downward, and the passing The second fan sucks away the gas inside the negative pressure tank directly below the material, and under the action of atmospheric pressure, the material is sucked to the surface of the fixed seat; the second working state: when the material is below the screen, the scraper mechanism will press the screen downward, and the screen will bend in an arc shape and contact the material line. When the scraper mechanism presses the screen and moves horizontally on the material surface, the second electromagnet below the scraper mechanism will be alternately closed (the second electromagnet not below the scraper mechanism is normally turned on). Compared with the vacuum suction cup used in the current screen printing machine, the present invention can avoid the depression of the material near the suction hole when printing flexible and thin materials, thereby ensuring that the ink can be evenly and completely transferred to the material surface to prevent the product printing pattern from being distorted.

[0010] Furthermore, two groups of air guide grooves are provided at the inner side end of the fixed seat, and the two groups of air guide grooves are connected through an annular channel. A three-way pipe is also provided inside the fixed seat, one end of the three-way pipe is connected to the air inlet end of the second fan, the other end of the three-way pipe is connected to a plurality of groups of negative pressure grooves through a first valve, and the last end of the three-way pipe is connected to the annular channel through a second valve. When the fixed seat of the present invention is not located below the second air cavity, the second valve is always in a closed state, and the first valve is always in an open state. At this time, the second fan can only control the gas in the negative pressure groove to be sucked away. When the fixed seat of the present invention is located below the second air cavity, the first valve is closed first to ensure that the negative pressure state in the negative pressure groove is not destroyed, and then the second valve is opened. At this time, the hot air after drying the ink and the exhaust gas generated during the drying of the ink can be continuously discharged from the bottom of the second air cavity through the second fan. On the one hand, it avoids the hot air discharged from the second air cavity from gathering below the second air cavity, resulting in local overheating of the material surface, and on the other hand, it accelerates the drying speed of the ink on the material surface.

[0011] Furthermore, the filter element includes a purification sleeve, one end of the purification sleeve is connected with the air outlet channel through a first air guide hole, and the other end of the purification sleeve is connected with the external environment through a second air guide hole. The purification sleeve is provided with an exhaust channel, and an adjusting component is provided at one end of the purification sleeve away from the exhaust channel. When the present invention is working, the first fan sucks away the gas below the first air cavity on the one hand, so as to pre-treat the unprinted material, and on the other hand, the gas in the first air cavity and the external gas are transported to the heating element for heating, so as to dry the material printed with ink. The present invention is provided with two groups of filter plates in the exhaust channel, and a telescopic frame is provided between the two groups of filter plates. A desiccant is provided in the telescopic frame. The gas in the first air cavity and the external gas will pass through the two groups of filter plates and the telescopic frame when flowing out of the purification sleeve. The desiccant in the two groups of filter plates and the telescopic frame can prevent the gas transported by the first fan to the heating element from containing impurities and moisture.

[0012] Furthermore, the adjustment component includes a first electromagnet, a hydraulic groove and an adjustment groove, one end of the telescopic frame is arranged in the adjustment groove, the telescopic frame and the adjustment groove are connected by an adjustment spring, the first electromagnet is arranged at one end of the hydraulic groove away from the adjustment groove, a movable plate and an adjustment fluid are arranged in the hydraulic groove, the hydraulic groove is connected to the adjustment groove, and the movable plate is magnetic. When the present invention is working, if the humidity of the external environment is high, the first electromagnet will generate a set of magnetic fields that repel the movable plate, so that the movable plate squeezes the adjustment fluid into the adjustment groove, and under the action of the hydraulic pressure, the telescopic frame extends into the two sets of filter plates If the external environment is relatively dry, the first electromagnet will generate a magnetic field that attracts the movable plate. Under the action of the adjusting spring, the telescopic frame leaves between the two groups of filter plates. The present invention controls the telescopic frame to move between the two groups of filter plates through the adjusting component, so as to facilitate the staff to choose whether to turn on the dehumidification function according to the external humidity conditions. On the one hand, it prevents the desiccant of the telescopic frame from being in contact with the external environment for a long time and thus reducing its performance. On the other hand, it prevents the telescopic frame from affecting the gas in the first air cavity and the smoothness of the external gas passing through the exhaust channel, ensuring that when the external environment is normal, the drying speed of the material printed with ink is affected.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: compared with the current screen printing machine, the present invention is provided with a sealing disk, and a first air cavity and a second air cavity are provided inside the sealing disk. During operation, the four sets of fixed seats provided by the present invention will carry the material to the bottom of the first air cavity, the bottom of the screen and the bottom of the second air cavity in turn. When the material passes under the first air cavity, the purification component can be used to pre-treat the unprinted material to avoid impurities on the surface of the material, so that the quality of the printed product is poor. When the material printed with ink passes under the second air cavity, the drying component and the infrared heating lamp are used to enable the staff to select the drying method according to the thickness of the ink printed on the surface of the material. Compared with the current screen printing machine, the pretreatment, printing, drying and other steps of the present invention can be carried out simultaneously, thereby improving the work efficiency. The present invention is also provided with a fixed seat. Compared with the vacuum suction cup used in the current screen printing machine, the present invention can avoid the material from approaching when printing flexible and thin materials. The area of ​​the suction hole is sunken, thereby ensuring that the ink can be evenly and completely transferred to the surface of the material, preventing the printed pattern of the product from being distorted. In addition, when drying the material printed with ink, the fixed seat can continuously discharge the hot air after drying the ink and the exhaust gas generated during the drying of the ink on the basis of ensuring that the material does not contact the external environment. On the one hand, it avoids local overheating of the material surface, and on the other hand, it accelerates the drying speed of the ink on the material surface, while also preventing the material from being contaminated by the external environment during the drying process. Finally, the present invention is also provided with an adjustment component, which can control the telescopic frame to move between the two groups of filter plates, so as to facilitate the staff to choose whether to turn on the dehumidification function of the filter element according to the external humidity conditions. On the one hand, it avoids the desiccant of the telescopic frame from contacting the external environment for a long time and thus reducing its performance. On the other hand, it avoids the telescopic frame from affecting the gas in the first air cavity and the patency of the external gas passing through the exhaust channel, ensuring that when the external environment is normal, the drying speed of the material printed with ink is affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the sealing cover of the present invention; Figure 3 It is a schematic diagram of the internal structure of the base of the present invention; Figure 4 The present invention Figure 3Schematic diagram of the structure of the middle AA section; Figure 5 This is a schematic diagram of the internal structure of the fixing seat of the present invention. Figure 6 This is a schematic diagram of the bottom structure of the fixed frame of the present invention. Figure 7 This is a schematic diagram of the purification sleeve structure of the present invention. Figure 8 It is a cross-sectional view of a purification sleeve of the present invention.

[0016] In the figure: 1, base; 11, air inlet; 12, turntable; 121, first gear; 13, air inlet chamber; 14, purification sleeve; 141, filter plate; 142, first air guide hole; 143, exhaust channel; 144, telescopic frame; 145, adjustment slot; 146, second air guide hole; 147, first electromagnet; 148, hydraulic slot; 15, first fan; 16, air outlet channel; 17, air inlet channel; 18, heating element; 19, second gear; 2, sealing cover; 21 , sealing plate; 211, first air cavity; 212, second air cavity; 3, clamping frame; 4, horizontal moving mechanism; 5, lifting and lowering moving mechanism; 6, ink scraping mechanism; 7, fixing frame; 71, screen; 72, positioning table; 8, fixing seat; 81, boss; 82, second fan; 83, three-way pipe; 831, first valve; 832, second valve; 84, negative pressure groove; 85, sealing frame; 86, telescopic groove; 87, second electromagnet; 88, air guide groove; 89, annular channel. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] See also Figure 1-Figure 8The present invention provides a technical solution: a screen printing machine with a positioning and drying function, the screen printing machine includes a base 1, a sealing cover 2, a lifting and moving mechanism 5 and a fixed seat 8, the sealing cover 2 and the lifting and moving mechanism 5 are relatively arranged above the base 1, the lifting and moving mechanism 5 is provided with a horizontal moving mechanism 4 on the side close to the sealing cover 2, the horizontal moving mechanism 4 is provided with an ink scraping mechanism 6 and a clamping frame 3 on the side close to the sealing cover 2, the clamping frame 3 is provided with a fixed frame 7 at the middle position, the fixed frame 7 is provided with a screen 71 at the middle position, the base 1 is provided with a turntable 12 and a servo motor (not shown in the figure), the servo motor is connected to the turntable 12 through a gear assembly, and the fixed The seat 8 is provided with four groups, and the four groups of fixed seats 8 are arranged in a ring shape above the turntable 12. The material is fixed by the fixed seat 8. The gear assembly includes a first gear 121 and a second gear 19. The first gear 121 is fixedly installed on the outer side of the turntable 12, and the second gear 19 is fixedly installed on the main shaft of the servo motor. The servo motor drives the turntable 12 to rotate through the gear assembly, so that the four groups of fixed seats 8 can pass directly under the screen 71 in sequence. In the present invention, a group of bosses 81 are provided on each group of fixed seats 8. When one group of fixed seats 8 is located directly under the screen 71, the fixed frame 7 is brought into contact with the boss 81 on the fixed seat 8 through the lifting and moving mechanism 5, and then the ink scraper is used. The structure 6 prints the ink on the screen 71 onto the surface of the material. Compared with the existing screen printing machine, the present invention is provided with a group of cylinders under each group of fixed seats 8, and the fixed seats 8 are driven to rise and fall on the turntable 12 by the cylinders. At the same time, a sealing disk 21 is provided inside the sealing cover 2, and a first air cavity 211 and a second air cavity 212 are provided inside the sealing disk 21. The lower ends of the first air cavity 211 and the second air cavity 212 are both provided with through holes. A purification component and a drying component are provided inside the base 1, and the purification component is connected to the first air cavity 211, and the drying component is connected to the second air cavity 212. Before working, the present invention needs to place the material on a group of fixed seats 8 away from the screen 71. Then, the servo motor and the turntable 12 are used to make the material pass through the bottom of the first air cavity 211, the bottom of the screen 71 and the bottom of the second air cavity 212 in sequence. When the material passes through the bottom of the first air cavity 211, a set of suction is generated by the purification component to pre-treat the unprinted material to avoid impurities on the surface of the material, so that the quality of the printed product is poor. When the material passes through the bottom of the screen 71, the cylinder drives the fixed seat 8 to move up to facilitate the contact between the fixed frame 7 and the boss 81 on the fixed seat 8. When printing is completed, when the material passes through the bottom of the second air cavity 212, hot air is delivered to the material printed with ink through the drying component, thereby achieving the purpose of drying.

[0019] like Figure 3As shown, the purification component includes an air inlet cavity 13 and a first fan 15, and the drying component includes a heating element 18. The air inlet end of the first fan 15 is connected to the air inlet cavity 13, and the air outlet end of the first fan 15 is connected to the second air cavity 212 through the heating element 18 and the air inlet channel 17. A filter element is arranged inside the air inlet cavity 13, and one end of the filter element is connected to the external environment through the air inlet hole 11, and the other end of the filter element is connected to the first air cavity 211 through the air outlet channel 16. When the unprinted material is located below the first air cavity 211, the gas in the first air cavity 211 and the impurities carried on the surface of the material are sucked away by the first fan 15, so as to avoid product defects. When the printed material is oily, the impurities in the first air cavity 211 are sucked away by the first fan 15, so as to avoid product defects. When the ink material is located below the second air cavity 212, the gas in the first air cavity 211 and the external gas are transported to the heating element 18 for heating through the first fan 15, and then this group of hot air will flow into the second air cavity 212 to dry the material printed with ink. The present invention is provided with four groups of fixed seats 8. Each time it works, except for one group of fixed seats 8 far away from the screen 71, there are materials on the remaining three groups of fixed seats 8. Through the above technical scheme, the first fan 15 can simultaneously pre-treat and dry the materials below the first air cavity 211 and the second air cavity 212 when working, which improves the work efficiency on the one hand, and achieves the purpose of one machine with multiple uses on the other hand, thereby reducing the cost of the equipment.

[0020] like Figure 3 As shown, an infrared heating lamp is arranged in the second air cavity 212, so that the staff can select the drying method according to the thickness of the ink printed on the surface of the material. A humidity detector (not shown in the figure) is arranged on the outside of the base 1. The filter element arranged in the present invention has the functions of dehumidifying and filtering impurities in the air. The humidity detector detects whether the humidity of the external environment is within the rated humidity, so that the filter element can choose whether to turn on the dehumidification function according to the external humidity conditions, so as to avoid the dehumidification area of ​​the filter element from being in contact with the external environment for a long time and thus reducing the performance.

[0021] like Figure 6 As shown, a positioning platform 72 is provided at the bottom end of the fixed frame 7, and a groove is provided at the bottom end of the positioning platform 72. The boss 81 cooperates with the groove. When the material in the present invention passes under the screen 71, the fixed seat 8 is driven upward by the cylinder, and the lifting and moving mechanism 5 drives the fixed frame 7 to descend. When the boss 81 is inserted into the groove, it means that the position of the material is correct. When the boss 81 cannot be inserted into the groove, it means that the rotation angle of the turntable 12 is deviated. Through the above technical solution, it is convenient for the staff to repair the equipment in time to avoid inaccurate printing areas.

[0022] like Figure 5As shown, a plurality of negative pressure grooves 84 are arranged at the upper end of the interior of the fixed seat 8, a group of telescopic grooves 86 are arranged below each group of negative pressure grooves 84, a group of sealing frames 85 are arranged inside each group of negative pressure grooves 84, a group of second electromagnets 87 are arranged in each group of telescopic grooves 86, one end of the sealing frame 85 is located in the negative pressure groove 84 and is wound with a spring, the other end of the sealing frame 85 is located in the telescopic groove 86 and has magnetism, a second fan 82 is arranged at the lower end of the interior of the fixed seat 8, and the second fan 82 is connected to the plurality of negative pressure grooves 84. When the present invention is working, the plurality of second electromagnets 87 have two working states. In the first working state, when the material is placed on the fixed seat 8, the second electromagnet 87 located directly below the material is turned on and generates a group of magnetic fields that attract the sealing frame 85. At this time, the sealing frame 85 is below The second blower 82 sucks away the gas inside the negative pressure groove 84 directly below the material, and the material is fixed to the surface of the fixed seat 8 under the action of atmospheric pressure; the second working state: when the material is below the screen 71, the scraper mechanism 6 presses the screen 71 downward, and the screen 71 bends into an arc and contacts the material line. When the scraper mechanism 6 presses the screen 71 and moves horizontally on the material surface, the second electromagnet 87 below the scraper mechanism 6 is alternately closed (the second electromagnet 87 not below the scraper mechanism 6 is normally opened). Compared with the vacuum suction cup used in the current screen printing machine, the present invention can avoid the depression of the material near the suction hole when printing flexible and thin materials, thereby ensuring that the ink can be evenly and completely transferred to the material surface to prevent the product printing pattern from being distorted.

[0023] like Figure 3 , Figure 5 As shown, two groups of air guide grooves 88 are provided at the inner side end of the fixed seat 8, and the two groups of air guide grooves 88 are connected through the annular channel 89. A three-way pipe 83 is also provided inside the fixed seat 8, one end of the three-way pipe 83 is connected to the air inlet end of the second fan 82, and the other end of the three-way pipe 83 is connected to a plurality of groups of negative pressure grooves 84 through a first valve 831, and the last end of the three-way pipe 83 is connected to the annular channel 89 through a second valve 832. When the fixed seat 8 of the present invention is not located below the second air cavity 212, the second valve 832 is always in a closed state, and the first valve 831 is always in an open state. state, at this time, the second fan 82 can only control the gas in the negative pressure groove 84 to be sucked away. When the fixing seat 8 of the present invention is located below the second air cavity 212, the first valve 831 is closed first to ensure that the negative pressure state in the negative pressure groove 84 is not destroyed, and then the second valve 832 is opened. At this time, the hot air after drying the ink and the waste gas generated when the ink is dried can be continuously discharged from the bottom of the second air cavity 212 through the second fan 82. On the one hand, it is avoided that the hot air discharged from the second air cavity 212 is gathered below the second air cavity 212 to cause local overheating of the material surface, and on the other hand, the drying speed of the ink on the material surface is accelerated.

[0024] like Figure 3 , Figure 7-Figure 8 As shown, the filter element includes a purification sleeve 14, one end of the purification sleeve 14 is connected to the air outlet channel 16 through the first air guide hole 142, and the other end of the purification sleeve 14 is connected to the external environment through the second air guide hole 146. The purification sleeve 14 is provided with an exhaust channel 143, and the end of the purification sleeve 14 away from the exhaust channel 143 is provided with an adjustment component. When the present invention is working, the first fan 15 is used to suck away the gas below the first air cavity 211 on the one hand, so as to pre-treat the unprinted material, and on the other hand, the gas in the first air cavity 211 is sucked away. The gas and external gas are transported to the heating element 18 for heating to dry the material printed with ink. In the present invention, two groups of filter plates 141 are arranged in the exhaust channel 143, and a telescopic frame 144 is arranged between the two groups of filter plates 141. A desiccant is arranged in the telescopic frame 144. The gas in the first air cavity 211 and the external gas will pass through the two groups of filter plates 141 and the telescopic frame 144 when flowing out of the purification sleeve 14. The two groups of filter plates 141 and the desiccant in the telescopic frame 144 prevent the gas transported by the first fan 15 to the heating element 18 from containing impurities and moisture.

[0025] like Figure 7-Figure 8 As shown, the adjustment component includes a first electromagnet 147, a hydraulic groove 148 and an adjustment groove 145, one end of the telescopic frame 144 is arranged in the adjustment groove 145, and the telescopic frame 144 and the adjustment groove 145 are connected by an adjustment spring. The first electromagnet 147 is arranged at one end of the hydraulic groove 148 away from the adjustment groove 145, and a movable plate and an adjustment fluid are arranged in the hydraulic groove 148. The hydraulic groove 148 is connected to the adjustment groove 145, and the movable plate has magnetism. When the present invention is working, if the humidity of the external environment is high, the first electromagnet 147 will generate a set of magnetic fields that repel the movable plate, so that the movable plate squeezes the adjustment fluid into the adjustment groove 145, and under the action of the hydraulic pressure, the telescopic frame 144 extends into the two groups Between the filter plates 141, if the external environment is relatively dry, the first electromagnet 147 will generate a magnetic field that attracts the movable plate. Under the action of the adjusting spring, the telescopic frame 144 leaves between the two groups of filter plates 141. The present invention controls the telescopic frame 144 to move between the two groups of filter plates 141 through an adjusting component, so as to facilitate the staff to choose whether to turn on the dehumidification function according to the external humidity conditions. On the one hand, it avoids the desiccant of the telescopic frame 144 from being in contact with the external environment for a long time and thus reducing its performance. On the other hand, it avoids the telescopic frame 144 from affecting the gas in the first air cavity 211 and the smoothness of the external gas passing through the exhaust channel 143, ensuring that when the external environment is normal, the drying speed of the material printed with ink is affected.

[0026] The working principle of the present invention is as follows: before work, the staff needs to place the material on a set of fixed seats 8 away from the screen 71, and then use the servo motor and the turntable 12 to make the material pass through the bottom of the first air cavity 211, the bottom of the screen 71 and the bottom of the second air cavity 212 in sequence. When the material passes under the first air cavity 211, the gas in the first air cavity 211 and the impurities carried on the surface of the material are sucked away by the first fan 15, so as to avoid surface pattern defects of the material when printing. When the material passes under the screen 71, the fixed seat 8 is driven by the cylinder to move up, so as to facilitate the contact between the fixed frame 7 and the boss 81 on the fixed seat 8. When the boss 81 is inserted into the groove, the ink scraping mechanism 6 will press the screen 71 to move down. At this time, the screen 71 will bend into an arc shape and contact with the material line. When the ink scraping mechanism 6 presses the screen 71 and moves horizontally on the surface of the material, the second electromagnet 87 located below the ink scraping mechanism 6 will be alternately closed (the second electromagnet 87 not located below the ink scraping mechanism 6 is normally turned on) to avoid the material from being dented in the area above the negative pressure groove 84 during the printing process, thereby ensuring that the ink can be evenly and completely transferred to the surface of the material and the printed pattern of the product is distorted. When the material printed with ink is located below the second air cavity 212, the gas in the first air cavity 211 and the external gas are transported to the heating element 18 for heating through the first fan 15, and then this group of hot air will flow into the second air cavity 212 to dry the material printed with ink.

[0027] Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and vary the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A screen printing machine with positioning and drying function, characterized in that: The screen printing machine comprises a base (1), a sealing cover (2), a lifting and moving mechanism (5) and a fixed seat (8); the sealing cover (2) and the lifting and moving mechanism (5) are arranged above the base (1) relative to each other; a horizontal moving mechanism (4) is arranged on the side of the lifting and moving mechanism (5) close to the sealing cover (2); an ink scraping mechanism (6) and a clamping frame (3) are arranged on the side of the horizontal moving mechanism (4) close to the sealing cover (2); a fixed frame (7) is arranged at the middle position of the clamping frame (3); a screen (71) is arranged at the middle position of the fixed frame (7); a turntable (12) and a servo motor are arranged inside the base (1); the servo motor is connected to the turntable (12) via a gear assembly; the fixed frame (7) is arranged at the middle position of the fixed frame (7); a rotating disk (12) and a servo motor are arranged inside the base (1); the servo motor is connected to the rotating disk (12) via a gear assembly; the fixed Four groups of fixed seats (8) are provided. The four groups of fixed seats (8) are arranged in a ring shape above the rotating disk (12). A group of cylinders is provided below each group of fixed seats (8). The fixed seats (8) are driven to rise and fall on the rotating disk (12) by the cylinders. A sealing disk (21) is provided inside the sealing cover (2). A first air cavity (211) and a second air cavity (212) are provided inside the sealing disk (21). A purification component and a drying component are provided inside the base (1). The purification component is connected to the first air cavity (211), and the drying component is connected to the second air cavity (212). The purification component is used to pre-treat unprinted materials, and the drying component is used to dry materials printed with ink.

2. The screen printing machine with positioning and drying function according to claim 1, characterized in that: The purification component comprises an air inlet cavity (13) and a first fan (15); the drying component comprises a heating element (18); an air inlet end of the first fan (15) is connected to the air inlet cavity (13); an air outlet end of the first fan (15) is connected to the second air cavity (212) via the heating element (18) and an air inlet passage (17); a filter element is arranged inside the air inlet cavity (13); one end of the filter element is connected to the external environment via an air inlet hole (11); and the other end of the filter element is connected to the first air cavity (211) via an air outlet passage (16).

3. The screen printing machine with positioning and drying function according to claim 2, characterized in that: An infrared heating lamp is arranged in the second air cavity (212), and a humidity detector is arranged on the outside of the base (1).

4. A screen printing machine with positioning and drying function according to any one of claims 1 to 3, characterized in that: The fixing seat (8) is provided with a boss (81), the bottom end of the fixing frame (7) is provided with a positioning platform (72), the bottom end of the positioning platform (72) is provided with a groove, and the boss (81) matches the groove.

5. The screen printing machine with positioning and drying function according to claim 4, characterized in that: A plurality of groups of negative pressure grooves (84) are arranged at the upper end of the interior of the fixed seat (8), a group of telescopic grooves (86) are arranged below each group of the negative pressure grooves (84), a group of sealing frames (85) are arranged inside each group of the negative pressure grooves (84), a group of second electromagnets (87) are arranged inside each group of the telescopic grooves (86), one end of the sealing frame (85) is located in the negative pressure groove (84) and is wound with a spring, the other end of the sealing frame (85) is located in the telescopic groove (86) and has magnetism, and a second fan (82) is arranged at the lower end of the interior of the fixed seat (8), the second fan (82) is connected to the plurality of groups of negative pressure grooves (84).

6. The screen printing machine with positioning and drying function according to claim 5, characterized in that: Two groups of air guide grooves (88) are provided at the inner side end of the fixed seat (8), and the two groups of air guide grooves (88) are connected through an annular channel (89). A three-way pipe (83) is also provided inside the fixed seat (8), one end of the three-way pipe (83) is connected to the air inlet end of the second fan (82), the other end of the three-way pipe (83) is connected to a plurality of groups of negative pressure grooves (84) through a first valve (831), and the last end of the three-way pipe (83) is connected to the annular channel (89) through a second valve (832).

7. The screen printing machine with positioning and drying function according to claim 2, characterized in that: The filter element comprises a purification sleeve (14); one end of the purification sleeve (14) is connected to an air outlet channel (16) via a first air guide hole (142) and a one-way valve; the other end of the purification sleeve (14) is connected to an external environment via a second air guide hole (146); an exhaust channel (143) is provided on the purification sleeve (14); an adjustment component is provided at one end of the purification sleeve (14) away from the exhaust channel (143); two groups of filter plates (141) are provided in the exhaust channel (143); a telescopic frame (144) is provided between the two groups of filter plates (141); a desiccant is provided in the telescopic frame (144); the adjustment component is connected to the telescopic frame (144); the telescopic frame (144) is controlled by the adjustment component to move between the two groups of filter plates (141).

8. The screen printing machine with positioning and drying function according to claim 7, characterized in that: The adjustment component comprises a first electromagnet (147), a hydraulic groove (148) and an adjustment groove (145); one end of the telescopic frame (144) is arranged in the adjustment groove (145); the telescopic frame (144) and the adjustment groove (145) are connected via an adjustment spring; the first electromagnet (147) is arranged at one end of the hydraulic groove (148) away from the adjustment groove (145); a movable plate and adjustment fluid are arranged in the hydraulic groove (148); the hydraulic groove (148) is connected to the adjustment groove (145); and the movable plate has magnetism.

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