Visual curing following printing system and method

Abstract

The invention provides a visual curing following printing system and method.The printing system comprises a printing mechanism, a following curing device and a driving mechanism, and the printing mechanism is used for printing light curing glue on the surface of a substrate; the follow-up curing device comprises a light generator, and the light generator is used for emitting curing light to cure the light curing glue liquid flowing out of the printing mechanism to the surface of the substrate; the printing mechanism comprises a printing needle head, the printing needle head is sleeved with the light generator, the light generator forms a light coverage area and a light shielding area relative to the substrate, and a plurality of observation windows are arranged in the light shielding area; the driving mechanism is used for driving the light generator to move relative to the printing needle. The printing state of the printing needle head can be observed in real time through the observation window; and when the printing needle head is blocked or hangs materials, printing is stopped, the driving mechanism is adopted to drive the light generator to move relative to the printing needle head, and the printing needle head is overhauled or cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, and in particular to a visual curing follow-up printing system and method. Background Art

[0002] With the continuous development of the semiconductor chip industry, the industries and equipment related to the mobile phone middle frame are also constantly updated and upgraded. Among them, the glue dispensing of the mobile phone middle frame is an important link in the mobile phone manufacturing process. The glue dispensing of the mobile phone middle frame uses glue dispensing equipment to apply glue on the middle frame to achieve the bonding and sealing of the mobile phone middle frame. During the glue dispensing process, the width and thickness of the glue dispensing require extremely high precision. In addition, the glue dispensing process must not have problems such as glue breakage, glue overflow, and glue collapse to ensure a close fit between the mobile phone frame and the screen module.

[0003] The existing mobile phone middle frame glue dispensing equipment includes a printing mechanism and a follow-up curing device. The follow-up curing device is used to timely cure the glue on the surface of the mobile phone middle frame during printing to prevent the glue pattern from collapsing. Among them, the follow-up curing device mostly uses a wrapped ring UV lamp, that is, the ring UV lamp wraps the entire printing needle, so that the printing needle cannot be observed in real time during the working process to obtain the needle status and glue pattern data. When glue leakage or needle blockage occurs, it is impossible to stop the maintenance in time.

[0004] The Chinese patent document discloses "a follow-up light-curing printing device", and its authorization announcement number is CN217395696U. The printing device includes a curing module and a light module; the curing module includes a bracket, an extruder, a light generator and a light spot adjustment member; the light module includes a control box and a fixed frame; one side of the fixed frame is fixedly connected to one side of the bracket; a through hole is opened inside the fixed frame, and a light generator is installed inside the through hole; the light spot adjustment member is installed on the fixed frame; the upper end of the extruder is fixed on the bracket, and the lower end is inserted into the fixed frame. However, the light generator of the patent cannot irradiate the glue on the surface of the mobile phone middle frame in all directions, and cannot achieve uniform curing. At the same time, the light generator of the printing device still adopts a sheathed structure, and it is impossible to observe the needle condition in real time during the working process. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a visual curing follow-up printing system and method, which is used to solve the problem that the follow-up curing device in the existing mobile phone frame dispensing equipment mostly uses a wrapped annular UV lamp to cover the entire printing needle, making it impossible to observe the printing needle in real time during the operation to obtain the needle status and glue type data, and when glue leakage or needle blockage occurs, maintenance cannot be stopped in time.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a visualized curing follow-up printing system, comprising a printing mechanism, a follow-up curing device and a driving mechanism, wherein the printing mechanism is used to print a light-curing glue on the surface of a substrate; the follow-up curing device comprises a light generator, and the light generator is used to emit curing light to cure the light-curing glue flowing out from the printing mechanism to the surface of the substrate; the printing mechanism comprises a printing needle, and the light generator is sleeved on the outside of the printing needle, and the light generator forms a light coverage area and a light shielding area relative to the substrate, and a plurality of observation windows are provided in the light shielding area; the driving mechanism is used to drive the light generator to move relative to the printing needle.

[0007] When the visualized curing follow-up printing system of the present application is applied to the glue dispensing process of the mobile phone middle frame, a printing mechanism is used to print the light-curing glue on the surface of the substrate, and a light generator is used to emit curing light to cure the light-curing glue flowing out of the printing mechanism to the surface of the substrate; the printing status of the printing needle is observed in real time through the observation window; when the printing needle is blocked, the printing is stopped, and the driving mechanism is used to drive the light generator to move relative to the printing needle to inspect the printing needle. The observation window must be set in the light shielding area of ​​the light generator, otherwise the light-curing glue to be cured on the surface of the mobile phone middle frame will not be fully irradiated by the curing light, resulting in uneven curing. The light shielding area refers to the area where the light generator fails to irradiate the substrate.

[0008] Preferably, the follow-up curing device further comprises an observation camera, and the observation camera is used to monitor the printing state of the printing needle in real time through the observation window and obtain glue type data.

[0009] Preferably, the printing mechanism further comprises a mounting plate and a supply barrel arranged on the mounting plate, the supply barrel is used to contain the photocurable adhesive, and the printing needle is arranged at the bottom of the supply barrel.

[0010] Preferably, the mounting plate is also provided with an open fixing frame, the barrel of the supply barrel is located in the open fixing frame, the observation camera is fixed on the open fixing frame, and the open fixing frame has an open state and a closed state. During normal printing, the open fixing frame is in a closed state; when the supply barrel needs to be replaced, the door-type fixing frame is in an open state, which is convenient for manual opening to take out the supply barrel in time for adding materials.

[0011] Preferably, the mounting plate is further provided with a barrel mounting seat located below the open fixing frame, the supply barrel is arranged on the barrel mounting seat, the barrel mounting seat is provided with a liquid level sensor, and the liquid level sensor is used to detect the liquid level of the photocurable adhesive in the supply barrel in real time.

[0012] Preferably, the driving mechanism comprises a linear guide rail arranged on the mounting plate, a slider slidably connected to the linear guide rail, and a driving member for driving the slider to move along the linear guide rail relative to the printing needle, and the light generator is fixedly connected to the slider.

[0013] Preferably, a limiting member is provided on the linear guide rail, and the limiting member is used to limit the movement stroke of the slider along the linear guide rail.

[0014] Preferably, the light generator is provided with a needle light shielding plate, and a needle accommodating hole for accommodating a printing needle is provided at the center of the needle light shielding plate. The present application provides a needle light shielding plate in the light generator, and the needle light shielding plate is used to absorb UV light scattered by a UV lamp to prevent the light-curing glue in the needle from being cured and thus causing needle blockage.

[0015] Preferably, the needle light shielding plate is arranged in the light coverage area of ​​the light generator. The curing light emitted by the light shielding area itself does not irradiate the substrate, and an observation window is provided. By arranging the needle light shielding plate in the light coverage area of ​​the light generator, the observation line of the observation window is avoided from being blocked.

[0016] Preferably, a light absorption groove is provided on the bottom surface of the needle light shielding plate, and the light absorption groove is used to absorb the curing light scattered by the light generator toward the printing needle to prevent the light-curing glue in the printing needle from solidifying and causing needle blockage.

[0017] More preferably, the light absorption groove is at least a step groove, which can form multi-level reflections for the scattered curing light, further improving the light absorption effect and preventing the light-curing glue in the printing needle from solidifying and causing needle blockage.

[0018] Preferably, the light generator is also provided with an airflow heat dissipation structure, and the airflow heat dissipation structure is used to cool the light generator through airflow. The UV curing lamp generates a large amount of heat during operation. In the prior art, a large-volume heat dissipation fan is connected to the UV curing lamp to achieve the heat dissipation effect. The present application creatively adopts an airflow heat dissipation structure, and replaces the traditional fan heat dissipation with airflow cooling, thereby reducing the volume of the follow-up curing device, making the structure of the printing system more compact and more widely applicable.

[0019] Preferably, the airflow heat dissipation structure comprises a plurality of airflow channels arranged along the circumference of the light generator, and the airflow channels are provided with air path interfaces, and the air path interfaces are used for connecting to an external air supply device.

[0020] Preferably, the light generator is an annular structure, the substrate is a mobile phone middle frame, the cross section of the observation window is a rectangle, and the two diagonals of the observation window are parallel to the long side and the short side of the mobile phone middle frame. When the position of the observation window is set according to the above structure, the observation window is just located in the light shielding area, which effectively solves the technical problem that the light-curable adhesive to be cured on the surface of the mobile phone middle frame cannot be fully irradiated and covered by the curing light, thereby achieving the technical effect of taking into account full curing and real-time observation of the printing needle status and acquisition of adhesive type data.

[0021] The present invention also provides a visualized curing follow-up printing method, which uses the above-mentioned visualized curing follow-up printing system and includes the following steps: A printing mechanism is used to print a light-curing adhesive on the surface of the substrate, and a light generator is used to emit curing light to cure the light-curing adhesive that flows out of the printing mechanism to the surface of the substrate; Observe the printing status of the printing needle in real time through the observation window; When the printing needle is clogged or stuck, printing is stopped, and a driving mechanism is used to drive the light generator to move relative to the printing needle, and the printing needle is repaired or cleaned by a glue erasing mechanism.

[0022] Preferably, the printing mechanism further comprises a mounting plate, an open fixing frame arranged on the mounting plate, a supply barrel and a liquid level sensor, the barrel body of the supply barrel is located in the open fixing frame, and the open fixing frame has an open state and a closed state; A liquid level sensor is used to detect the liquid level of the light-curing adhesive in the supply barrel in real time. When the light-curing adhesive needs to be replenished, the open fixed frame is opened, and the supply barrel is taken out for replenishment.

[0023] Preferably, the follow-up curing device further comprises an observation camera, and the observation camera is fixed on the open fixing frame; During the printing process, an observation camera is used to observe the printing status of the print needle in real time through the observation window and obtain the glue type data.

[0024] As described above, the visual curing and printing system and method of the present invention have the following beneficial effects: (1) The visualized curing follow-up printing system of the present application, when applied to the glue dispensing process of the mobile phone middle frame, uses a printing mechanism to print light-curing glue on the surface of the substrate, and uses a light generator to emit curing light to cure the light-curing glue flowing out of the printing mechanism to the surface of the substrate; the printing status of the printing needle is observed in real time through the observation window; when the printing needle is blocked, the printing is stopped, and the driving mechanism is used to drive the light generator to move relative to the printing needle to inspect and repair the printing needle; (2) The observation window is set in the light shielding area of ​​the light generator, that is, the area where the light generator cannot irradiate the substrate, so as to avoid the situation where the light-curing adhesive to be cured on the surface of the mobile phone middle frame cannot be fully irradiated by the curing light, resulting in uneven curing; (3) A needle light shielding plate is provided between the printing needle and the light generator, and the needle light shielding plate is used to absorb the UV light scattered by the UV lamp to prevent the light-curing glue in the needle from being cured and thus causing needle blockage; an airflow heat dissipation structure is used instead of the traditional fan heat dissipation, which reduces the volume of the follow-up curing device, making the structure of the visual curing follow-up printing system more compact and more widely applicable; (4) An open-type fixing frame with an open state and a closed state is used. During normal printing, the open-type fixing frame is in a closed state; when the supply barrel needs to be replaced, the door-type fixing frame is in an open state, which is convenient for manual opening and timely removal of the supply barrel for adding materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is a schematic diagram of the structure of a visual curing-following printing system.

[0026] Figure 2 Display as Figure 1 Schematic diagram of the structure from another perspective.

[0027] Figure 3 Shown is a schematic diagram of the assembly structure of the light generator and the light shielding plate.

[0028] Figure 4 Display as Figure 3 Schematic diagram of the structure from another perspective.

[0029] Figure 5 Shown is a schematic diagram of the structure of the light generator.

[0030] Figure 6 Shown is a schematic diagram of the three-dimensional structure of the sunshade.

[0031] Figure 7 Schematic diagram showing the structure with the open bracket opened.

[0032] Figure 8 Shown is a schematic diagram of the application scenario of the follow-up curing device and the mobile phone middle frame.

[0033] Explanation of the accompanying drawings: light generator 1, needle accommodating hole 11, observation window 12, needle shading plate 13, light absorption groove 131, air path interface 14, printing needle 2, substrate 3, observation camera 4, mounting plate 5, supply barrel 51, open fixing frame 52, first support plate 521, second support plate 522, hinge 523, camera mounting plate 524, positioning bead 525, indexing pin 526, barrel mounting seat 53, liquid level sensor 531, linear guide rail 6, slider 61, driving member 62, limit member 63. DETAILED DESCRIPTION

[0034] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 creative work are within the scope of protection of the present invention.

[0035] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0036] Unless otherwise clearly specified and limited, the terms "connection", "fixation" and "setting" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] like Figure 1 and Figure 2As shown, an embodiment of the present application provides a visualized curing follow-up printing system, including a printing mechanism, a follow-up curing device and a driving mechanism, wherein the printing mechanism is used to print a photocurable adhesive on the surface of a substrate 3; the follow-up curing device includes a light generator 1 and an observation camera 4, wherein the light generator is used to emit curing light to cure the photocurable adhesive flowing out from the printing mechanism to the surface of the substrate; the printing mechanism includes a printing needle 2, a mounting plate 5 and a supply barrel 51, an open fixing frame 52 and a barrel mounting seat 53 arranged on the mounting plate, wherein the barrel body of the supply barrel is located in the open fixing frame, the observation camera is fixed on the open fixing frame, the open fixing frame has an open state and a closed state, the supply barrel is arranged on the barrel mounting seat, and the barrel mounting seat is provided with a liquid level sensor 531, and the liquid level sensor is used to detect the liquid level of the photocurable adhesive in the supply barrel in real time. The light generator is sleeved on the outside of the printing needle. The light generator forms a light coverage area and a light blocking area relative to the substrate. The light blocking area refers to the area where the light generator fails to irradiate the substrate. A plurality of observation windows 12 are provided in the light blocking area. The observation camera is used to monitor the printing status of the printing needle in real time through the observation window and obtain the glue type data; the driving mechanism is used to drive the light generator to move relative to the printing needle. The driving mechanism includes a linear guide 6 provided on the mounting plate, a slider 61 slidably connected to the linear guide, and a driving member 62 for driving the slider to move along the linear guide relative to the printing needle. The light generator is fixedly connected to the slider, and a limiter 63 is provided on the linear guide. The limiter is used to limit the movement stroke of the slider along the linear guide. The driving member can be a telescopic cylinder or the like.

[0038] like Figure 3 and Figure 4 As shown, the light generator is provided with a needle light shielding plate 13, the center of which is provided with a needle accommodating hole 11 for accommodating a printing needle, and the needle light shielding plate 13 is arranged in the light coverage area of ​​the light generator. Figure 6 As shown, the bottom surface of the needle light shielding plate is provided with a light absorption groove 131, which is used to absorb the curing light scattered by the light generator toward the printing needle to prevent the light-curing glue in the printing needle from being cured and causing needle blockage. The light absorption groove is a multi-step groove, which can form multi-level reflections for the scattered curing light, further improving the light absorption effect, and preventing the light-curing glue in the printing needle from being cured and causing needle blockage.

[0039] like Figure 7As shown, the open fixing frame 52 includes a first support plate 521 and a first support plate 522 arranged opposite to each other and a camera mounting plate 524. The mounting plate 521, the first support plate 522 and the camera mounting plate 524 are enclosed to form a supply barrel accommodating space, so that the barrel body of the supply barrel is located in the supply barrel accommodating space of the open fixing frame, and the observation camera is fixed on the camera mounting plate. The first support plate 522 and the camera mounting plate 524 are hinged by a hinge 523, and the open fixing frame 52 realizes two states of opening and closing through the cooperation of a positioning bead 525 and a dividing pin 526.

[0040] The light generator is also provided with an airflow heat dissipation structure, which is used to cool the light generator by airflow. The airflow heat dissipation structure includes a plurality of airflow channels arranged along the circumference of the light generator, and the airflow channels are provided with the following Figure 3 The gas circuit interface 14 shown is used for connecting to an external gas supply device.

[0041] like Figure 8 As shown, the light generator is a ring structure, the light generator is a ring-shaped UV curing lamp, the curing light is UV light, and the light-curing adhesive is UV glue. Figure 5 The substrate is a mobile phone middle frame, the cross section of the observation window is a rectangle, and the two diagonal lines of the observation window are parallel to the long side and the short side of the mobile phone middle frame respectively.

[0042] The embodiment of the present application also provides a visual curing follow-up printing method, which uses the above-mentioned visual curing follow-up printing system and includes the following steps: A printing mechanism is used to print a light-curing adhesive on the surface of the substrate, and a light generator is used to emit curing light to cure the light-curing adhesive that flows out of the printing mechanism to the surface of the substrate; A liquid level sensor is used to detect the liquid level of the light-curing adhesive in the supply barrel in real time. When the light-curing adhesive needs to be replenished, the positioning bead 525 and the indexing pin 526 are separated, the open fixing frame is opened, and the supply barrel is taken out for adding material; During the printing process, an observation camera is used to observe the printing status of the printing needle in real time through the observation window and obtain the glue type data. The printing status of the printing needle is observed in real time through the observation window; When the print needle is clogged or stuck, printing is stopped, and the drive member 62 is used to drive the light generator 1 to drive the slider 61 to move along the linear guide 6 relative to the print needle 2. At this time, the print needle is separated from the light generator 1, and the print needle can be inspected or cleaned using an eraser mechanism.

[0043] In summary, when the visualized curing and following printing system of the present invention is applied to the glue dispensing process of the mobile phone middle frame, a printing mechanism is used to print the light-curing glue on the surface of the substrate, and a light generator is used to emit curing light to cure the light-curing glue flowing out of the printing mechanism to the surface of the substrate; the printing state of the printing needle is observed in real time through the observation window; when the printing needle is blocked, the printing is stopped, and a driving mechanism is used to drive the light generator to move relative to the printing needle, and the printing needle is repaired or the glue erasing mechanism is used to clean the printing needle. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A visual curing and printing system, characterized in that: The invention comprises a printing mechanism, a follow-up curing device and a driving mechanism, wherein the printing mechanism is used to print a light-curing adhesive on the surface of a substrate (3); the follow-up curing device comprises a light generator (1), wherein the light generator is used to emit curing light to cure the light-curing adhesive flowing out of the printing mechanism to the surface of the substrate; the printing mechanism comprises a printing needle (2), wherein the light generator is sleeved outside the printing needle, and the light generator forms a light covering area and a light shielding area relative to the substrate, wherein a plurality of observation windows (12) are provided in the light shielding area; and the driving mechanism is used to drive the light generator to move relative to the printing needle.

2. The visual curing and printing system according to claim 1, characterized in that: The follow-up curing device also includes an observation camera (4), which is used to monitor the printing state of the printing needle in real time through the observation window and obtain glue type data.

3. The visual curing and following printing system according to claim 2, characterized in that: The printing mechanism further comprises a mounting plate (5) and a supply barrel (51) arranged on the mounting plate, the supply barrel being used to contain light-curing adhesive liquid, and the printing needle being arranged at the bottom of the supply barrel.

4. The visual curing and following printing system according to claim 3, characterized in that: An open fixing frame (52) is also provided on the mounting plate, the barrel body of the supply barrel is located in the open fixing frame, the observation camera is fixed on the open fixing frame, and the open fixing frame has an open state and a closed state.

5. The visualized curing and following printing system according to claim 4, characterized in that: The mounting plate is also provided with a barrel mounting seat (53) located below the open fixing frame, the supply barrel is arranged on the barrel mounting seat, and the barrel mounting seat is provided with a liquid level sensor (531), the liquid level sensor being used to detect the liquid level of the light-curing adhesive in the supply barrel in real time.

6. The visualized curing and following printing system according to claim 3, characterized in that: The driving mechanism comprises a linear guide rail (6) arranged on a mounting plate, a slider (61) slidably connected to the linear guide rail, and a driving member (62) for driving the slider to move along the linear guide rail relative to the printing needle head, and the light generator is fixedly connected to the slider.

7. The visualized curing and printing system according to claim 6, characterized in that: A limiting member (63) is provided on the linear guide rail, and the limiting member is used to limit the movement stroke of the slide block along the linear guide rail.

8. The visualized curing and printing system according to claim 1, characterized in that: The light generator is provided with a needle light shielding plate (13), and a needle accommodating hole (11) for accommodating a printing needle is provided at the center of the needle light shielding plate.

9. The visualized curing and printing system according to claim 8, characterized in that: The needle light shielding plate (13) is arranged in the light coverage area of ​​the light generator.

10. The visualized curing and following printing system according to claim 8, characterized in that: A light absorbing groove (131) is provided on the bottom surface of the needle light shielding plate, and the light absorbing groove is used to absorb the curing light scattered by the light generator in the direction of the printing needle, so as to prevent the light curing glue in the printing needle from curing and causing needle blockage.

11. The visualized curing and following printing system according to claim 1, characterized in that: The light generator is also provided with an airflow heat dissipation structure, and the airflow heat dissipation structure is used to cool the light generator through airflow.

12. The visualized curing and following printing system according to claim 11, characterized in that: The airflow heat dissipation structure comprises a plurality of airflow channels arranged along the circumference of the light generator, the airflow channels being provided with an air path interface (14) for connecting to an external air supply device.

13. The visualized curing and printing system according to claim 1, characterized in that: The light generator is an annular structure, the substrate is a mobile phone middle frame, the cross section of the observation window is a rectangle, and two diagonal lines of the observation window are parallel to the long side and the short side of the mobile phone middle frame respectively.

14. A visual curing and following printing method, characterized in that: The visual curing and following printing system as claimed in any one of claims 1 to 13 comprises the following steps: A printing mechanism is used to print a light-curing adhesive on the surface of the substrate, and a light generator is used to emit curing light to cure the light-curing adhesive that flows out of the printing mechanism to the surface of the substrate; Observe the printing status of the printing needle in real time through the observation window; When the printing needle is clogged or stuck, printing is stopped, and a driving mechanism is used to drive the light generator to move relative to the printing needle, and the printing needle is repaired or cleaned by a glue erasing mechanism.

15. The visual curing and following printing method according to claim 14, characterized in that: The printing mechanism also includes a mounting plate, an open fixing frame arranged on the mounting plate, a supply barrel and a liquid level sensor, wherein the barrel body of the supply barrel is located in the open fixing frame, and the open fixing frame has an open state and a closed state; A liquid level sensor is used to detect the liquid level of the light-curing adhesive in the supply barrel in real time. When the light-curing adhesive needs to be replenished, the open fixed frame is opened, and the supply barrel is taken out for replenishment.

16. The visualized curing and following printing method according to claim 15, characterized in that: The following curing device further comprises an observation camera, and the observation camera is fixed on the open fixing frame; During the printing process, an observation camera is used to observe the printing status of the print needle in real time through the observation window and obtain the glue type data.

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