An on-demand printing system

Abstract

The present application relates to the field of printing system equipment, and discloses a kind of on-demand printing system, including fixed plate frame, setting in fixed plate frame for the placement component of steel mesh, setting in fixed plate frame and the glue valve for glue outlet of drive mechanism, drive mechanism is also provided with the glue scraping plate component for glue scraping on it, glue valve is connected with glue supply mechanism, drive mechanism includes linear drive assembly and slide rail assembly being arranged in the both sides of placement component, linear drive assembly and slide rail assembly are provided with the moving horizontal shaft being located above placement component and being driven by linear drive assembly and moving horizontally above placement component, two vertical drive assemblies are arranged on the corresponding position of moving horizontal shaft and placement component, and vertical direction movement of glue scraping plate component and glue valve is driven respectively. Quantitative glue outlet is used to glue valve, control glue amount, and use how much to export how much, reduce residual glue, reduce the contact time of glue and air, save resources and can reduce subsequent cleaning difficulty.

Description

Technical Field

[0001] This utility model relates to the field of printing system equipment, and in particular to an on-demand printing system. Background Technology

[0002] Screen printing is a stencil printing technique. Its basic principle is to use a screen as a printing plate, creating a screen printing plate with images and text through a photosensitive method. During printing, ink is transferred to the substrate through the mesh of the image area by a squeegee, forming an image identical to the original artwork. Existing equipment involves pouring large amounts of glue directly onto a flat surface, making it difficult to control the amount of glue and resulting in direct contact with air. This leads to glue waste, easy contamination from air exposure, difficulty in cleaning after use, and the need for manual readjustment after maintenance, which is time-consuming and highly dependent on the operator's skill level. Utility Model Content

[0003] This invention provides an on-demand printing system that solves the technical problems of existing equipment where large amounts of glue are poured directly onto a flat surface, making it difficult to control the amount of glue and causing direct contact with air. This results in glue waste, easy contamination upon contact with air, difficulty in cleaning after use, and the need for manual readjustment after maintenance, which is time-consuming and relies on the operator's skill level.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an on-demand printing system, including a fixed plate frame, a placement component for placing a steel mesh on the fixed plate frame, a drive mechanism on the fixed plate frame, and a glue dispensing mechanism for dispensing glue on the drive mechanism. The glue dispensing mechanism is a scraper valve. The drive mechanism is also provided with a scraper assembly for scraping glue. The scraper valve is connected to a glue supply mechanism. The drive mechanism includes a linear drive component and a slide rail component arranged parallel to both sides of the placement component. A moving horizontal axis is provided on the linear drive component and the slide rail component, located above the placement component and driven by the linear drive component to move horizontally above the placement component. A first vertical drive component and a second vertical drive component are provided on the moving horizontal axis at positions corresponding to the placement component. The scraper assembly is provided on the first vertical drive component and is driven by the first vertical drive component to move vertically to scrape glue. The scraper valve is provided on the second vertical drive component and is driven by the second vertical drive component to move vertically. Using a scraper valve to dispense glue in precise quantities controls the amount of glue used, reducing residual glue, shortening the time the glue is exposed to air, saving resources, and reducing the difficulty of subsequent cleanup.

[0005] Furthermore, the glue scraper valve includes a solenoid valve, a glue quantity control valve body, a glue inlet head, a flow divider, and a scraper head. The glue quantity control valve body is fixedly connected to the lower end of the solenoid valve. A glue control valve rod controlled by the solenoid valve is disposed within the glue quantity control valve body. The flow divider is disposed at the lower end of the glue quantity control valve body. The glue inlet head is disposed on one side of the flow divider. A first glue inlet channel and a second glue inlet channel are connected to the glue inlet head and the flow divider. The flow divider has a glue inlet cavity whose flow rate is controlled by the glue control valve rod. The glue inlet cavity in the flow divider is connected to a glue outlet channel. The scraper head is fixed to the flow divider and cooperates with the glue outlet channel to control the glue flow. Automatic electrical signal adjustment saves debugging time and reduces operator skill requirements.

[0006] Furthermore, the upper end of the diverter nozzle is provided with a sealing recess communicating with the upper end of the glue inlet cavity. The lower end of the glue quantity control valve body is provided with a sealing assembly located within the sealing recess. The sealing assembly has a through cavity through which the glue control valve rod extends into the glue inlet cavity. At least one inner sealing ring is provided in the through cavity, which elastically abuts against the outer surface of the glue control valve rod. The outer surface of the sealing assembly has an annular groove, and at least one outer sealing ring is provided in the annular groove, which elastically abuts against the side wall of the sealing recess. This structure is simple and effectively prevents glue from overflowing from the glue inlet cavity.

[0007] Furthermore, the dispensing channel on the nozzle is end-of-lined with a dispensing groove. This dispensing groove includes two first-section dispensing grooves extending horizontally from the end of the dispensing channel to both sides; two second-section dispensing grooves extending vertically downwards from the relatively distant ends of the two first-section dispensing grooves; a third-section dispensing groove horizontally connecting the lower ends of the two second-section dispensing grooves; and two fourth-section dispensing grooves along the horizontal outer edges of the third-section dispensing groove. This effectively disperses the adhesive evenly, ensuring uniform and stable dispensing and preventing accumulation and leakage.

[0008] Furthermore, the corners at the connections of the first, second, third, and fourth flow dividers are all rounded and flared, facilitating the flow of the adhesive.

[0009] Furthermore, the scraper head is detachably fixed to the diverter nozzle, and the scraper head and diverter nozzle are configured to form a rectangular dispensing groove that connects to the third and fourth diverter grooves. This allows for easy cleaning, a large dispensing area, and uniform dispensing.

[0010] Furthermore, an elastic clip is provided between the scraper head and the diverter nozzle. When fixed between the scraper head and the diverter nozzle, the elastic clip covers the first and second diverter grooves and has a guide notch that connects with the third and fourth diverter grooves. The guide notch, together with the diverter nozzle and the scraper head, forms a rectangular dispensing groove. This provides good sealing, is easy to clean, and the elastic clip can be directly replaced during cleaning and maintenance, resulting in high maintenance efficiency.

[0011] Furthermore, the scraper assembly includes a scraper fixing plate, a vertical slide rod, a spring, and a scraper. The scraper fixing plate is fixed to a first vertical drive assembly and is driven to move vertically by the first vertical drive assembly. A horizontal limiting plate is provided at the lower end of the scraper fixing plate. The horizontal limiting plate has multiple vertical through holes that limit the vertical movement of the vertical slide rod. A limiting cap is provided at the upper end of the vertical slide rod. The lower end of the vertical slide rod passes through the vertical through holes and is fixed to the upper end of the scraper. The spring is sleeved on the vertical slide rod portion below the horizontal limiting plate, with both ends abutting against the lower end of the horizontal limiting plate and the upper end of the scraper, respectively. This avoids damage to the components due to hard contact.

[0012] Furthermore, the lower end of the scraper is provided with an inclined scraping section, and the lower side of the scraping section is provided with connected inclined first and second scraping sections. The angle between the first scraping section and the horizontal plane is greater than the angle between the second scraping section and the horizontal plane. This results in a better and more uniform scraping effect. Attached Figure Description

[0013] Figure 1 This is a top view schematic diagram of the present invention;

[0014] Figure 2 This is a front view schematic diagram of the scraper valve;

[0015] Figure 3 This is a right-side view of the glue inlet head, diverter nozzle, and glue scraper head of the glue scraper valve after they have been cut open.

[0016] Figure 4 This is a schematic diagram of the lower side of the diverter nozzle;

[0017] Figure 5 This is a front view of the lower side of the diverter nozzle and the elastic clip;

[0018] Figure 6 This is a right-side schematic diagram of the scraper assembly and the first vertical drive assembly.

[0019] The components marked in the diagram are: scraper valve 100, solenoid valve 110, glue quantity control valve body 120, glue control valve stem 121, sealing assembly 122, glue inlet head 130, first glue inlet channel 131, diverter nozzle 140, second glue inlet channel 141, glue inlet cavity 142, glue outlet channel 143, first diverter groove 144, second diverter groove 145, third diverter groove 146, fourth diverter groove 147, scraper head 150, and elastic clip 16. 0. Scraper assembly 200, scraper fixing plate 210, horizontal limiting plate 211, vertical slide bar 220, limiting cap 221, spring component 230, scraper 240, scraper part 241, first scraper part 242, second scraper part 243, linear drive assembly 310, slide rail assembly 320, moving horizontal axis 330, first vertical drive assembly 340, second vertical drive assembly 350, placement assembly 400, fixing plate frame 500. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 The on-demand printing system shown includes a fixed plate frame 500, a placement assembly 400 for mounting a stencil on the fixed plate frame 500, a drive mechanism on the fixed plate frame 500, and a glue dispensing mechanism on the drive mechanism for dispensing glue. The glue dispensing mechanism is a scraper valve 100. The drive mechanism is also equipped with a scraper assembly 200 for scraping glue. The scraper valve 100 is connected to a glue supply mechanism. The drive mechanism includes a linear drive assembly 310 and a slide rail assembly 320 arranged parallel to both sides of the placement assembly 400. The 20 is provided with a horizontal moving axis 330 located above the placement component 400 and driven horizontally above the placement component 400 by a linear drive component 310. A first vertical drive component 340 and a second vertical drive component 350 are provided on the horizontal moving axis 330 at positions corresponding to the placement component 400. The glue scraper assembly 200 is provided on the first vertical drive component 340 and is driven by the first vertical drive component 340 to move vertically to scrape glue. The glue scraper valve 100 is provided on the second vertical drive component 350 and is driven by the second vertical drive component 350 to move vertically.

[0022] In this specific embodiment, the linear drive component 310 is a linear motor. In specific implementations, the linear drive component 310 can also be a motor and lead screw assembly or a linear drive mechanism such as a cylinder with controllable stroke. The first vertical drive component 340 and the second vertical drive component 350 are both slide cylinder assemblies. In specific implementations, the first vertical drive component 340 and the second vertical drive component 350 can also be linear drive components such as linear motors. In specific implementations, the linear drive component 310 drives the scraper valve 100 to move horizontally to the position of the placement component 400. Upon reaching the designated position, the second vertical drive assembly 350 drives the scraper valve 100 downwards to a preset position for initial glue dispensing. After the initial glue dispensing and application, the second vertical drive assembly 350 drives the scraper valve 100 upwards to reset, and the linear drive assembly 310 drives the scraper plate assembly 200 horizontally to the position corresponding to the placement assembly 400. The first vertical drive assembly 340 then drives the scraper plate assembly 200 downwards to a preset position, and the linear drive assembly 310 drives the scraper plate assembly 200 horizontally for a second glue application, thus completing the automated glue dispensing process. Using the scraper valve 100 to dispense a measured amount of glue controls the amount dispensed, reducing residual glue, shortening the glue's contact time with air, saving resources, and reducing subsequent cleanup difficulty.

[0023] Based on the above, such as Figures 1 to 3 As shown, the scraper valve 100 includes a solenoid valve 110, a glue quantity control valve body 120, a glue inlet head 130, a flow divider 140, and a scraper head 150. The glue quantity control valve body 120 is fixedly connected to the lower end of the solenoid valve 110. A glue control valve rod 121 controlled by the solenoid valve 110 is disposed inside the glue quantity control valve body 120. The flow divider 140 is disposed at the lower end of the glue quantity control valve body 120, and the glue inlet head 130 is disposed at the lower end of the flow divider head 150. On one side of the nozzle 140, the glue inlet head 130 and the diverter nozzle 140 are provided with a first glue inlet channel 131 and a second glue inlet channel 141 that are connected. The diverter nozzle 140 has a glue inlet cavity 142 whose flow rate is controlled by a glue control valve rod 121. The glue inlet cavity 142 in the diverter nozzle 140 is connected to a glue outlet channel 143. The glue scraper head 150 is fixed to the diverter nozzle 140 and works with the glue outlet channel 143 to control the glue flow. In specific implementation, the glue quantity control valve body 120 is controlled by a solenoid valve 110 to automatically adjust the position of the glue control valve rod 121, thereby controlling the amount of glue entering the glue inlet cavity 142. Automatic electrical signal adjustment saves debugging time and reduces operator skill requirements.

[0024] Based on the above, such as Figures 1 to 3As shown, the upper end of the diverter nozzle 140 is provided with a sealing recess communicating with the upper end of the glue inlet cavity 142. The lower end of the glue quantity control valve body 120 is provided with a sealing assembly 122 located within the sealing recess. The sealing assembly 122 is provided with a through cavity through which the glue control valve rod 121 extends into the glue inlet cavity 142. At least one inner sealing ring is provided in the through cavity, which elastically abuts against the outer surface of the glue control valve rod 121. The outer surface of the sealing assembly 122 is provided with an annular groove, and at least one outer sealing ring is provided in the annular groove, which elastically abuts against the side wall of the sealing recess. In this specific embodiment, there are two inner sealing rings and one outer sealing ring. In specific implementations, the number of inner and outer sealing rings can be selected according to the actual situation. The structure is simple and can effectively prevent glue from overflowing from the glue inlet cavity 142.

[0025] Based on the above, such as Figure 3 and Figure 4 As shown, the end of the glue dispensing channel 143 on the flow divider 140 is provided with a glue-distributing groove. The glue-distributing groove includes two first-section flow dividers 144 extending horizontally to both sides from the end of the glue dispensing channel 143, two second-section flow dividers 145 extending vertically downward from the two relatively far ends of the two first-section flow dividers 144, a third-section flow divider 146 horizontally connecting the lower ends of the two second-section flow dividers 145, and two fourth-section flow dividers 147 along the horizontal outer edge of the third-section flow divider 146. In specific implementation, the glue finally flows out through the third-section flow divider 146 and the fourth-section flow divider 147, effectively dispersing the glue evenly, ensuring uniform and stable glue dispensing, and avoiding accumulation and leakage.

[0026] Based on the above, such as Figure 3 and Figure 4 As shown, the corners at the connections of the first diversion channel 144, the second diversion channel 145, the third diversion channel 146, and the fourth diversion channel 147 are all rounded and outwardly flared surfaces. This facilitates the flow of adhesive.

[0027] Based on the above, such as Figures 2 to 5 As shown, the scraper head 150 is detachably fixed to the diverter nozzle 140, and the scraper head 150 and the diverter nozzle 140 are configured to form a rectangular dispensing groove that connects to the third diverter groove 146 and the fourth diverter groove 147. In this specific embodiment, the scraper head 150 is detachably fixed to the diverter nozzle 140 by multiple bolts. When cleaning the diverter nozzle 140 and the scraper head 150, the bolts can be directly removed, making cleaning convenient. The rectangular dispensing groove connects to the third diverter groove 146 and the fourth diverter groove 147, resulting in a large dispensing area and uniform dispensing.

[0028] Based on the above, such as Figures 2 to 5As shown, an elastic clip 160 is provided between the scraper head 150 and the diverter nozzle 140. When the elastic clip 160 is fixed between the scraper head 150 and the diverter nozzle 140, it covers the first diverter groove 144 and the second diverter groove 145 and is provided with a guide notch that mates with the third diverter groove 146 and the fourth diverter groove 147. The guide notch, together with the diverter nozzle 140 and the scraper head 150, forms a rectangular glue outlet groove. This design provides good sealing, is easy to clean, and allows for direct replacement of the elastic clip 160 during cleaning and maintenance, resulting in high maintenance efficiency.

[0029] Based on the above, such as Figure 1 and Figure 6 As shown, the scraper assembly 200 includes a scraper fixing plate 210, a vertical slide rod 220, a spring member 230, and a scraper 240. The scraper fixing plate 210 is fixed on a first vertical drive assembly 340 and is driven by the first vertical drive assembly 340 to move vertically. A horizontal limiting plate 211 is provided at the lower end of the scraper fixing plate 210. The horizontal limiting plate 211 is provided with a plurality of vertical through holes that limit the vertical movement of the vertical slide rod 220. A limiting cap 221 is provided at the upper end of the vertical slide rod 220. The lower end of the vertical slide rod 220 passes through the vertical through holes and is fixed to the upper end of the scraper 240. The spring member 230 is sleeved on the portion of the vertical slide rod 220 below the horizontal limiting plate 211 and its two ends abut against the lower end of the horizontal limiting plate 211 and the upper end of the scraper 240, respectively. In practice, the scraper 240 makes elastic contact with the scraping surface when scraping glue, avoiding hard contact that could damage the parts.

[0030] Based on the above, such as Figure 1 and Figure 6 As shown, the lower end of the scraper 240 is provided with an inclined scraping part 241. The lower side of the scraping part 241 is provided with connected inclined first scraping part 242 and second scraping part 243. The angle between the first scraping part 242 and the horizontal plane is greater than the angle between the second scraping part 243 and the horizontal plane. In specific implementations, the first scraping part 242 is used first to initially spread the glue evenly, and then the second scraping part 243 is used for more precise scraping. Completing the scraping on an inclined surface results in a better and more uniform scraping effect.

[0031] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An on-demand printing system, comprising a fixed plate holder (500), a placement assembly (400) disposed on the fixed plate holder (500) for placing a stencil, a drive mechanism disposed on the fixed plate holder (500), and a glue dispensing mechanism disposed on the drive mechanism for dispensing glue, characterized in that: The glue dispensing mechanism is a scraper valve (100), and the driving mechanism is also provided with a scraper assembly (200) for scraping glue. The scraper valve (100) is connected to a glue supply mechanism. The driving mechanism includes a linear drive assembly (310) and a slide rail assembly (320) arranged parallel to both sides of the placement assembly (400). The linear drive assembly (310) and the slide rail assembly (320) are provided with water jets located above the placement assembly (400) and driven by the linear drive assembly (310) above the placement assembly (400). A horizontal axis (330) for translational movement is provided, on which a first vertical drive assembly (340) and a second vertical drive assembly (350) are provided at positions corresponding to the placement assembly (400). The scraper assembly (200) is provided on the first vertical drive assembly (340) and is driven by the first vertical drive assembly (340) to move vertically to scrape glue. The scraper valve (100) is provided on the second vertical drive assembly (350) and is driven by the second vertical drive assembly (350) to move vertically.

2. The on-demand printing system according to claim 1, characterized in that: The scraper valve (100) includes a solenoid valve (110), a glue quantity control valve body (120), a glue inlet head (130), a flow divider (140), and a scraper head (150). The glue quantity control valve body (120) is fixedly connected to the lower end of the solenoid valve (110). A glue control valve rod (121) controlled by the solenoid valve (110) is provided inside the glue quantity control valve body (120). The flow divider (140) is located at the lower end of the glue quantity control valve body (120), and the glue inlet head (130) is located at the flow divider head (150). On one side of the nozzle (140), the glue inlet head (130) and the diverter nozzle (140) are provided with a first glue inlet channel (131) and a second glue inlet channel (141) that are connected. The diverter nozzle (140) is provided with a glue inlet cavity (142) whose flow rate is controlled by a glue control valve rod (121). The glue inlet cavity (142) in the diverter nozzle (140) is connected to a glue outlet channel (143). The glue scraper head (150) is fixed on the diverter nozzle (140) and cooperates with the glue outlet channel (143) to control the glue flow.

3. The on-demand printing system according to claim 2, characterized in that: The upper end of the diverter (140) is provided with a sealing recess that communicates with the upper end of the glue inlet cavity (142). The lower end of the glue quantity control valve body (120) is provided with a sealing assembly (122) located in the sealing recess. The sealing assembly (122) is provided with a through cavity through which the glue control valve rod (121) extends into the glue inlet cavity (142). At least one inner sealing ring that elastically abuts against the outer surface of the glue control valve rod (121) is provided in the through cavity. The outer surface of the sealing assembly (122) is provided with an annular groove. At least one outer sealing ring that elastically abuts against the side wall of the sealing recess is provided in the annular groove.

4. The on-demand printing system according to claim 3, characterized in that: The dispensing channel (143) on the dispensing nozzle (140) is provided with a dispensing groove at the end. The dispensing groove includes two first dispensing grooves (144) extending horizontally from the end of the dispensing channel (143) to both sides, two second dispensing grooves (145) extending vertically downward from the two ends of the two first dispensing grooves (144) that are relatively far apart, a third dispensing groove (146) connecting the lower ends of the two second dispensing grooves (145) in a horizontal direction, and two fourth dispensing grooves (147) at both ends of the third dispensing groove (146) along the horizontal outer edge of the direction of the third dispensing groove (146).

5. The on-demand printing system according to claim 4, characterized in that: The corners at the connection points of the first diversion channel (144), the second diversion channel (145), the third diversion channel (146), and the fourth diversion channel (147) are all smooth, outwardly expanding arc surfaces.

6. The on-demand printing system according to claim 5, characterized in that: The scraper head (150) is detachably fixed on the diverter nozzle (140), and the scraper head (150) and the diverter nozzle (140) are configured to form a rectangular dispensing groove that is connected to the third diverter groove (146) and the fourth diverter groove (147).

7. The on-demand printing system according to claim 6, characterized in that: An elastic clip (160) is provided between the scraper head (150) and the diverter nozzle (140). When the elastic clip (160) is fixed between the scraper head (150) and the diverter nozzle (140), it covers the first diverter groove (144) and the second diverter groove (145) and is provided with a flow guide notch that connects with the third diverter groove (146) and the fourth diverter groove (147). The flow guide notch, together with the diverter nozzle (140) and the scraper head (150), forms a rectangular glue outlet groove.

8. The on-demand printing system according to claim 1, characterized in that: The scraper assembly (200) includes a scraper fixing plate (210), a vertical slide bar (220), a spring (230), and a scraper (240). The scraper fixing plate (210) is fixed on a first vertical drive assembly (340) and is driven by the first vertical drive assembly (340) to move vertically. A horizontal limiting plate (211) is provided at the lower end of the scraper fixing plate (210), and multiple limiting devices are provided on the horizontal limiting plate (211). The vertical slide rod (220) has a vertical through hole for vertical movement. The upper end of the vertical slide rod (220) is provided with a limit cap (221). The lower end of the vertical slide rod (220) passes through the vertical through hole and is fixed to the upper end of the scraper plate (240). The spring (230) is sleeved on the vertical slide rod (220) portion below the horizontal limit plate (211) and its two ends abut against the lower end of the horizontal limit plate (211) and the upper end of the scraper plate (240) respectively.

9. The on-demand printing system according to claim 8, characterized in that: The lower end of the scraper (240) is provided with an inclined scraping part (241). The lower side of the scraping part (241) is provided with a connected inclined first scraping part (242) and second scraping part (243). The angle between the first scraping part (242) and the horizontal plane is greater than the angle between the second scraping part (243) and the horizontal plane.

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