Stacked screen printing machine

Abstract

The utility model relates to a stackable screen printing machine, which comprises a central printing mechanism, a printing mechanism and a printing mechanism, the two opposite sides of the central printing mechanism are provided with a first side and a second side. The two positioning frames are respectively connected to the first side and the second side of the central printing mechanism; and the two material trolleys are detachably arranged on the two positioning frames, and a plurality of carrying discs are stored in the two material trolleys. When the printing station executes printing operation, the carrying disc on the uppermost portion of the material trolley on the first side is moved by a first conveying mechanism to the central printing mechanism for printing, and the carrying disc lifting mechanism on the first side moves the remaining carrying discs of the material trolley on the first side upwards by one layer. And the carrying disc at the lowermost part of the material trolley at the second side is moved to the lowermost part of the material trolley at the first side by a second conveying mechanism. According to the utility model, the same printed matter can be repeatedly printed in a single printing machine, so that the site cost and the time cost of the printing operation are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a screen printing machine, in particular to a stackable screen printing machine. BACKGROUND

[0002] The existing screen printing equipment is mostly continuous and connected in series, and only a small drying oven is left between the printing stations. When the same screen pattern needs to be printed on the material multiple times, the following problems may occur: (1) The number of screen plates corresponding to the number of times of stack printing needs to be made, and the screen plate making itself has errors, so it is difficult to control the precision when using different screen plates for stack printing. (2) Stack printing often occurs in the gold oil base coating process for making a printing pattern on the surface of the material. Water-based gold oil needs a long drying time, and is not suitable for using infrared and other heating devices for rapid drying. The drying oven of the existing automatic screen printing machine often cannot dry normally. (3) The product often has different stack printing process sequences. When using the existing automatic screen printing machine for production, each printing station can only print once and then move down to the oven for drying before printing again at the next station. Because the number of printing stations needed depends on the total number of stack printing times of each process, a large number of printing stations are needed. Therefore, how to provide a single-module printing machine that can perform repeated stack printing through single printing is one of the urgent problems to be solved by the practitioners and researchers in the printing industry. SUMMARY

[0003] The utility model aims at providing a stackable screen printing machine that can complete the repeated printing of the same printed matter on a single printing machine.

[0004] To achieve the above-mentioned utility model purposes, the utility model provides a stacked screen printing machine, which comprises a printing mechanism for printing a carrier disc, the printing mechanism has a first side and a second side on opposite sides, two positioning frames are connected to the first side and the second side of the printing mechanism, two material trolleys are movably arranged in the two positioning frames on the first side and the second side, each material trolley has a plurality of support layers arranged in an up-down interval for placing a plurality of carrier discs, a first conveying mechanism is movably arranged on the top of the printing mechanism, and both ends of the first conveying mechanism correspond to the uppermost support layers of the two material trolleys, a second conveying mechanism is movably arranged on the bottom of the printing mechanism, and both ends of the second conveying mechanism correspond to the lowermost support layers of the two material trolleys, and two carrier disc lifting mechanisms are arranged in the two positioning frames in a liftable manner for being controlled to move each carrier disc on the material trolley in the positioning frame up and down, wherein when printing is performed, the uppermost carrier disc of the material trolley on the first side is moved to the printing mechanism by the first conveying mechanism for printing, each remaining carrier disc of the material trolley on the first side is moved up by one layer by the carrier disc lifting mechanism on the first side, the lowermost carrier disc of the material trolley on the second side is moved to the lowermost support layer of the material trolley on the first side by the second conveying mechanism, each remaining carrier disc of the material trolley on the second side is moved down by one layer by the carrier disc lifting mechanism on the second side, and after printing of the carrier disc is completed, the carrier disc is moved to the uppermost support layer of the material trolley on the second side by the first conveying mechanism, and each carrier disc is sequentially and circularly moved until printing of each carrier disc is completed.

[0005] The carrier disc lifting mechanism comprises a plurality of claw groups, a plurality of claw telescopic driving units and a plurality of claw lifting driving units, each claw group is arranged on opposite sides of the material trolley, each claw group has a plurality of claws corresponding to each support layer of the material trolley, each claw telescopic driving unit is connected to each claw group to drive each claw group to move towards or away from the material trolley, and each claw lifting driving unit is connected to each claw group to drive each claw group to move up and down along the vertical direction.

[0006] Opposite sides of each material trolley are provided with two detachable support groups, each support group has a plurality of support pieces arranged in an up-down interval and extending inward, and each support layer is formed between the support pieces, so that when the carrier disc is arranged on each support layer, the bottom of the carrier disc is supported on each support piece.

[0007] The tray lifting mechanism further comprises two clamping units and two clamping unit driving units. The two clamping units are respectively arranged at the bottom of the positioning frame and correspond to the two connecting portions of the two support groups of the material trolley. The two clamping unit driving units are movably connected to the two clamping units to drive the two clamping units to clamp the two connecting portions and move in the direction of approaching or moving away from the material trolley, so that the two support groups can be separated outward from the material trolley or reset inward.

[0008] The positioning frame further comprises a trolley positioning mechanism, which has two handles arranged on opposite sides of the positioning frame and can be moved between an open position and a closed position to limit the material trolley from leaving the positioning frame when the material trolley enters the positioning frame.

[0009] The positioning frame further comprises a trolley lifting mechanism, which has a plurality of positioning claws and a plurality of positioning claw driving units. Each positioning claw is movably arranged at a corner of the positioning frame and corresponds to a plurality of positioning holes in the bottom of the material trolley. Each positioning claw driving unit is movably connected to one end of each positioning claw to drive each positioning claw to extend and retract and ascend, so that each positioning claw can extend into each positioning hole of the material trolley to form a fixed position when the material trolley enters the positioning frame, and the material trolley is lifted to a predetermined height.

[0010] The first conveying mechanism has two tracks, two transmission members, two tray driving units, two hooks and two pushers. The two tracks are arranged on opposite sides of the printing mechanism. The two transmission members are arranged in the two tracks to be driven by a power source to rotate in a rotating direction. The two tray driving units are movably arranged in the two tracks and connected to the two transmission members to be driven by the two transmission members to move along the two tracks. The two hooks are arranged on one side of the two tray driving units to hook the uppermost tray of the material trolley on the first side and move the tray to the printing mechanism with the transmission members. The two pushers are arranged on the other side of the two tray driving units opposite the two hooks to push the tray located in the printing mechanism to the uppermost support layer of the material trolley on the second side.

[0011] The second conveying mechanism has a conveying belt and a conveying belt lifting unit. The conveying belt is driven to rotate in a rotating direction. The conveying belt lifting unit is arranged at the bottom of the conveying belt to drive the conveying belt to move up and down, so that the height of the conveying belt moves to correspond to the lowermost support layer of the two material trolleys.

[0012] The utility model further comprises a drying mechanism arranged on one side of the positioning frame to perform drying operation on each tray in the two material trolleys under control.

[0013] The printing mechanism comprises a printing seat and a printing seat lifting device; the printing seat is used for placing the carrier disc, and the printing seat lifting device is movably connected to the printing seat and used for driving the printing seat to move along the Z-axis direction to control the height of the printing seat.

[0014] The present application can complete the repeated printing operation on the same printed matter in a single printing machine, effectively reducing the site cost and time cost of the printing operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of a preferred embodiment of the present application.

[0016] Figure 2 It is an exploded view of a preferred embodiment of the present application.

[0017] Figure 3 It is a perspective view of a material trolley of a preferred embodiment of the present application.

[0018] Figure 4 It is a partial perspective view of a material trolley after removing the carrier disc of a preferred embodiment of the present application.

[0019] Figure 5 It is a partial enlarged view of Figure 3 .

[0020] Figure 6 It is a perspective view of a trolley positioning mechanism of a preferred embodiment of the present application.

[0021] Figure 7 It is a perspective view of a trolley jacking mechanism of a preferred embodiment of the present application.

[0022] Figure 8 It is a perspective view of a carrier disc lifting mechanism of a preferred embodiment of the present application.

[0023] Figure 9 It is a perspective view of a first conveying mechanism of a preferred embodiment of the present application.

[0024] Figure 10 It is a working schematic view of a preferred embodiment of the present application, showing the path of the circulating movement of the carrier disc.

[0025] Figures 11-17 It is a working schematic view of a preferred embodiment of the present application, showing the process of the carrier disc lifting mechanism controlling the carrier disc in the material trolley to rise.

[0026] SYMBOL DESCRIPTION:

[0027] (1)Stacked screen printing machine (10) printing mechanism (11) printing seat (12) printing positioning area (13) printing seat lifting device (20) positioning frame (21) frame (22) accommodation space (23) entrance and exit (24) trolley limiting mechanism (240) handle (25) trolley jacking mechanism (250) positioning claw (250a) inclined surface (251) positioning claw driving unit (26) mounting groove (27) ventilation hole (30) material trolley (31) trolley body (310) moving wheel (311) positioning hole (311a) bearing (32) support group (320) support body (321) bearing piece (322) connecting part (33) bearing layer (40) carrier disc lifting mechanism (41) jacking claw group (410) jacking claw (42) jacking claw telescopic driving unit (43) jacking claw lifting driving unit (44) clamping claw unit (45) clamping claw driving unit (50) first conveying mechanism (51) rail (52) transmission part (53) carrier disc driving unit (54) hook claw (55) push claw (60) second conveying mechanism (61) conveying belt (62) conveying belt lifting unit (70) drying mechanism (100) carrier disc DETAILED DESCRIPTION

[0028] The following description with reference to the drawings is a preferred embodiment of the present application. It should be understood that the drawings and the description herein are only for the purpose of illustration and are not intended to limit the present application. In addition, the words "upper", "lower", "left", "right", "front", "back", "first", "second", and the like described in the specification, are used to clearly describe the relative position between the elements or mechanisms, and are not used as limiting terms.

[0029] Please refer to Figures 1-9 The stacked screen printing machine (1) provided by the preferred embodiment of the present application is used to provide a single machine modular printing device, which can complete the stacked printing operation of multiple carrier discs in a single printing station. The so-called stacked printing operation refers to the repeated stacked printing of planar screen printing on the same printed matter multiple times. The stacked screen printing machine (1) mainly comprises a printing mechanism (10), two positioning frames (20), two material trolleys (30), two carrier disc lifting mechanisms (40), a first conveying mechanism (50), a second conveying mechanism (60), and multiple drying mechanisms (70). Among them:

[0030] The printing mechanism (10) comprises a printing seat (11) and a printing positioning area (12). The printing seat (11) is used to displace the printing blade set above the screen plate to perform printing. The printing positioning area (12) is used to provide a support platform for printing and can position the position of the carrier plate in the X-axis and Y-axis directions of the printing seat (11). The printing related technology of the printing mechanism (10) is similar to that of the large area printing machine on the market, and the detailed content is not described here. It is particularly important to note that the printing mechanism (10) of the utility model further comprises a printing seat lifting device (13) movably connected to the printing seat (11) to drive the printing seat (11) to move along the Z-axis direction to control the height of the printing seat (11). In this embodiment, the printing seat lifting device (13) is controlled by a servo motor, and the user can set the screen plate height to gradually increase during the cycle printing, and the screen surface and the material surface distance is continuously maintained when the thickness of the base coating gradually increases. Among them, the relative two sides of the printing mechanism (10) have a first side and a second side.

[0031] Two positioning frames (20) are respectively arranged on the first side and the second side of the printing mechanism (10). Each positioning frame (20) has a frame body (21), a containing space (22) and an entrance (23). The frame body (21) is a metal combined member, one end of which is connected to the printing mechanism (10). The containing space (22) is arranged inside the frame body (21). The entrance (23) is arranged on the side of the positioning frame (20) away from the printing mechanism (10) and is communicated with the containing space (22).

[0032] The material trolley (30) is a mobile carrier which is detachably arranged in the accommodating space (22) of the positioning frame (20) and can be manually driven or automatically controlled to enter or exit the positioning frame (20) from the entrance (23) of the positioning frame (20). Specifically, the material trolley (30) has a trolley body (31), two support groups (32) and a plurality of holding layers (33). The bottom side of the trolley body (31) is provided with a plurality of moving wheels (310) and a plurality of positioning holes (311) arranged above the moving wheels (310). The two support groups (32) are detachably arranged on the opposite sides of the trolley body (31), and each support group (32) has a support body (320), a plurality of holding pieces (321) and a connecting part (322). The support body (320) is a metal frame generally in the shape of U. The holding pieces (321) are arranged side by side on the support body (320), and the holding pieces (321) of the two support groups (32) correspond to each other. The connecting part (322) is arranged on the bottom side of the support body (320) and extends away from the material trolley (30). Each holding layer (33) is formed between the holding pieces (321) and is used to accommodate a plurality of carrier plates (100). When each carrier plate (100) is accommodated in each holding layer (33), the bottom of each carrier plate (100) is supported on each holding piece (321). In this embodiment, the user places or pastes the material to be printed on the carrier plate (100) in advance, and then places the carrier plate (100) into the material trolley (30). At this time, the support groups (32) are fixed by a tension spring (not shown) so that the support groups (32) cannot be moved.

[0033] The positioning frame (20) further comprises a trolley limiting mechanism (24) and a trolley lifting mechanism (25). The trolley limiting mechanism (24) has two handles (240) arranged on the opposite sides of the frame body (21) of the positioning frame (20) and can be moved between an open position and a closed position. The two handles (240) are used to move from the open position to the closed position to block the entrance (23) of the positioning frame (20) when the material trolley (30) enters the positioning frame (20), so that the material trolley (30) is fixed in the positioning frame (20) and cannot exit the positioning frame (20). In this embodiment, the two handles (240) are two manual handles.

[0034] The trolley lifting mechanism (25) is arranged at the bottom of the positioning frame (20) and has a plurality of positioning claws (250) and a plurality of positioning claw driving units (251). Each positioning claw (250) is movably arranged at a corner of the positioning frame (20) and corresponds to a plurality of positioning holes at the bottom of the material trolley (30), and a bevel (250a) is arranged at the front end of each positioning claw. Each positioning claw driving unit (251) is connected to one end of each positioning claw (250) to drive the positioning claw (250) to extend and retract. Each positioning hole (311) is provided with a bearing (311a) above, and the height of each bearing (311a) is lower than that of each positioning claw (250) when the material trolley (30) is on the ground. When the material trolley (30) enters the positioning frame (20), the trolley lifting mechanism (25) is started to make each positioning claw (250) inserted into each positioning hole (311), and the bevel (250a) at the front end of each positioning claw (250) contacts the bearing (311a) above the positioning hole (311) and lifts it, so that the material trolley (30) is lifted to a predetermined height and leaves the ground. In this way, the height position of the two material trolleys (30) in the two positioning frames (20) can be kept consistent and will not be affected by the uneven ground.

[0035] The two tray lifting mechanisms (40) are respectively arranged on the two positioning frames (20) and respectively act on the two material trolleys (30) to lift the trays of the material trolleys (30). Specifically, each tray lifting mechanism (40) includes four claw groups (41), four claw extension and retraction driving units (42), four claw lifting driving units (43), two clamping claw units (44), and two clamping claw driving units (45). Two claw groups (41) are arranged on opposite sides of the material trolley (30) at a distance from each other. Each claw group (41) has a plurality of claws (410) arranged in an upper and lower interval, and the position of each claw (410) corresponds to each support layer (33) of the material trolley (30). Each claw extension and retraction driving unit (42) is connected to each claw group (41) to drive each claw group (41) to move towards or away from the material trolley (30). Each claw lifting driving unit (43) is connected to each claw group (41) to drive each claw group (41) to move up and down in the vertical direction. Two clamping claw units (44) are arranged on the bottom of the positioning frame (20) and correspond to two connecting parts (322) of two support groups (32) of the material trolley (30), to be driven by the clamping claw driving unit (45) to clamp the connecting part, and can be further driven by the clamping claw driving unit (45) to move towards or away from the material trolley (30), so that the support group (32) can be separated or reset from the material trolley (30).

[0036] The first conveying mechanism (50) is arranged on the top of the printing mechanism (10) and corresponds to the two support layers (33) on the top of the material trolley (30) on the two sides, respectively, to move the tray on the top of the material trolley (30) on the first side to the printing mechanism (10) for printing, and drive the tray on the printing mechanism (10) to move to the support layer (33) on the top of the material trolley (30) on the second side for placement. Specifically, the first conveying mechanism (50) has two tracks (51), two driving members (52), two tray driving units (53), two claws (54), and two push claws (55). The two tracks (51) are arranged on the opposite sides of the printing seat of the printing mechanism (10), respectively. The two driving members (52) are arranged in the two tracks (51), respectively, to be driven to rotate in a rotating direction by a power source. The two tray driving units (53) are movably arranged in the two tracks (51) and connected to the two driving members (52), to be driven by the two driving members (52) to move along the two tracks (51). The two claws (54) are arranged on one side of the two tray driving units (53), to hook the tray (100) on the top of the material trolley (30) on the first side and move the tray to the printing mechanism (10) with the driving member (52). The two push claws (55) are arranged on the other side of the two tray driving units (53) opposite to the two claws (54), to push the tray on the printing mechanism (10) to move to the support layer (33) on the top of the material trolley (30) on the second side. Among them, the two tray driving units (53) are controlled to rise so that the two claws (54) or the two push claws (55) can contact the tray (100), and when the tray (100) moves to a predetermined position, the two tray driving units (53) are lowered to make the two claws (54) or the two push claws (55) disengage from the tray (100).

[0037] The second conveying mechanism (60) is arranged at the bottom of the printing mechanism (10) and corresponds to the two support layers (33) of the lowermost material trolley (30) on the two sides, so as to be controlled to move the tray (100) of the lowermost material trolley (30) on the second side to the support layer (33) of the lowermost material trolley (30) on the first side. The second conveying mechanism (60) comprises a conveying belt (61) and a conveying belt lifting unit (62). In the embodiment, the conveying belt (61) is a double-track synchronous PVC belt conveyor. The conveying belt lifting unit (62) is arranged at the bottom of the conveying belt (61) and is used to control the lifting of the conveying belt (61). When the two material trolleys (30) enter the equipment for positioning, the two material trolleys (30) are lifted to keep the height of the two material trolleys (30) consistent during positioning and not affected by the uneven ground, so the bottom conveyor is designed to be movable up and down. When the two material trolleys (30) are not positioned, the conveying belt lifting unit (62) drives the conveying belt (61) to descend to facilitate the entry and exit of the two material trolleys (30) without interference. When the two material trolleys (30) are positioned, the conveying belt lifting unit (62) drives the conveying belt (61) to rise so that the conveying belt (61) can receive the tray (100) of the lowermost layer of the two material trolleys (30).

[0038] The two drying mechanisms (70) are arranged on the opposite sides of the positioning frame (20) and are used to dry each tray (100) in the material trolley (30). Specifically, each positioning frame (20) has an installation groove (26) and a plurality of ventilation holes (27) on the opposite sides, which are connected to the installation groove (26). Each drying mechanism (70) is installed in the installation groove (26) of the positioning frame (20) and heats the installation groove (26) through the ventilation holes (27). In the embodiment, the drying mechanism (70) can be a hot air dryer, an infrared dryer, a filament dryer or any other device that can heat and dry each tray.

[0039] According to the above structure, the stacking screen printing machine (1) provided by the utility model has the following actual operation applications:

[0040] Please refer to Figure 10As shown, when the stacking type screen printing machine (1) of the present application performs printing operation, the topmost tray (100) of the material trolley (30) on the first side is moved to the printing mechanism (10) by the first conveying mechanism (50) for printing. Then, the tray lifting mechanism (40) on the first side moves the remaining trays (100) of the material trolley (30) on the first side upward by one layer. Then, the bottommost tray (100) of the material trolley (30) on the second side is moved to the bottommost support layer (33) of the material trolley (30) on the first side by the second conveying mechanism (60). Then, the tray lifting mechanism (40) on the second side moves the remaining trays (100) of the material trolley (30) on the second side downward by one layer. Then, after the printing mechanism (10) completes printing, the tray (100) is moved to the topmost support layer (33) of the material trolley (30) on the second side by the first conveying mechanism (50). The trays (100) of the two material trolleys (30) are sequentially moved N times until the printing operation of each tray (100) is completed, so that the printed products on each tray (100) can complete the stacking type printing operation at a single printing station. N is a positive integer greater than 2.

[0041] The detailed mechanism of the tray lifting mechanism (40) on the first side lifting each tray (100) of the material trolley (30) by one layer will be further described below. As shown in Figure 11 When the tray lifting mechanism (40) on the first side is in standby state, each top claw extension and retraction drive unit (42) is in retracted state, and each top claw lifting drive unit (43) is in retracted state. At this time, each tray (100) has not contacted each top claw group (41). When the topmost tray (100) of the material trolley (30) is moved to the printing mechanism (10) by the first conveying mechanism (50), the tray lifting mechanism (40) on the first side starts to operate. First, as shown in Figure 12 Each top claw extension and retraction drive unit (42) drives each top claw group (41) to extend obliquely upward towards the material trolley (30), so that each top claw of each top claw group (41) extends into each support layer (33) of the material trolley (30) and lifts each tray (100) upward. Then, as shown in Figure 13 The two clamp jaw drive units (45) control the two clamp jaw units (44) to clamp the two connecting portions of the two support groups (32) and move outward, so that the two support groups (32) are separated from the material trolley (30). It is worth noting that since the two support groups (32) are withdrawn from the material trolley (30), each tray (100) is no longer supported by the two support groups (32), and the two support groups (32) do not block the movement of each tray (100) in the vertical direction. Then, as shown in Figure 14As shown, each of the top claw lifting driving units (43) drives each of the top claw groups (41) to move upward, so that each of the carrier plates (100) is lifted upward synchronously. The distance of the upward movement of each of the carrier plates (100) is about the height of the supporting layer (33). Then, as shown in FIG. 4C, Figure 15 As shown, the two clamping claw driving units (45) control the two clamping claw units (44) to move inward, so that the two support groups (32) are reconnected to the material trolley (30). Then, as shown in FIG. 4D, Figure 16 As shown, each of the top claw retracting driving units (42) drives each of the top claw groups (41) to retract obliquely downward away from the material trolley (30), so that each of the top claws of each of the top claw groups (41) is away from each of the supporting layers (33) of the material trolley (30) and each of the carrier plates (100) is supported by each of the supporting pieces (321) of the two support groups (32). Finally, as shown in FIG. 4E, Figure 17 As shown, each of the top claw lifting driving units (43) drives each of the top claw groups (41) to move downward, so that each of the top claw groups (41) returns to the standby position to complete the carrier plate lifting operation. It should be noted that, at this time, the position of each of the carrier plates (100) has been moved upward by one layer compared with the beginning, so that the supporting layer (33) on the top of the material trolley (30) on the first side can always keep the state that there is a carrier plate (100) to be moved.

[0042] On the other hand, the detailed mechanism of lowering and raising of each tray (100) of the material trolley (30) on the second side is similar to that of the first side, except that the initial position and moving direction of the top claw are reversed. When the tray lifting mechanism (40) on the second side is in standby state, each top claw extension and retraction drive unit (42) is in extended state, and each top claw lifting drive unit (43) is in retracted state, so the initial position of the top claw group (41) is higher. When the tray (100) of the printing mechanism (10) is moved to the uppermost support layer (33) of the material trolley (30) on the second side by the first conveying mechanism (50), the tray lifting mechanism (40) on the second side starts to operate. First, each top claw extension and retraction drive unit (42) drives each top claw group (41) to extend obliquely upward toward the material trolley (30), so that each top claw of each top claw group (41) extends into each support layer (33) of the material trolley (30) and lifts each tray (100) upward. Then, the two clamp jaw drive units (45) control the two clamp jaw units (44) to clamp the two connecting portions of the two support groups (32) and move outward, so that the two support groups (32) are separated from the material trolley (30). Then, each top claw lifting drive unit (43) drives each top claw group (41) to move downward, so that each tray (100) moves downward synchronously. The distance of downward movement of each tray (100) is about the height of a support layer (33). Then, the two clamp jaw drive units (45) control the two clamp jaw units (44) to move inward, so that the two support groups (32) are reconnected to the material trolley (30). Then, each top claw extension and retraction drive unit (42) drives each top claw group (41) to retract obliquely downward away from the material trolley (30), so that each top claw of each top claw group (41) is away from each support layer (33) of the material trolley (30) and each tray (100) is supported by each support piece (321) of each support group (32) again. Finally, each top claw lifting drive unit (43) drives each top claw group (41) to move upward, so that each top claw group (41) returns to the standby position and completes the tray lowering operation. It is worth noting that the position of each tray (100) has been lowered by one layer compared with the beginning, so that the support layer (33) at the top of the material trolley (30) on the second side can always accommodate trays.

[0043] It is to be supplemented that, in addition to the single printing station form, the stacking screen printing machine can also be configured as a modular production line design composed of multiple printing stations, material feeding stations, and material trolleys in another preferred embodiment. Each material trolley moves between each material feeding station and each printing station as needed, and the production line can be flexibly arranged according to the production process of the product. For example, the three-dimensional base coating which needs a large amount of time can be allocated to multiple stations, and then the subsequent single station coloring is composed. In this way, more complex or larger printing operations can be met.

[0044] In summary, the stacking screen printing machine provided by the utility model provides a single machine modular printing machine for the user, so that the carrier disc continuously moves up and down between the two material trolleys and the printing mechanism (10), thereby realizing repeated stacking printing in a single printing machine. In addition, the utility model can also be combined with the material trolley to achieve multi-station printing station series printing production. The single machine modular design and the material trolley design make it easier to cope with different printing frequency process composition of products, and the arrangement of the production line is more flexible.

Claims

1. A stacked screen printer characterized by It comprises a printing mechanism for printing a carrier disc, the printing mechanism has a first side and a second side on opposite sides, two positioning frames are connected to the first side and the second side of the printing mechanism, two material trolleys are movably arranged in the two positioning frames of the first side and the second side, each material trolley has a plurality of upper and lower spaced support layers for placing a plurality of carrier discs, a first conveying mechanism is movably arranged at the top of the printing mechanism, both ends correspond to the uppermost support layers of the two material trolleys, a second conveying mechanism is movably arranged at the bottom of the printing mechanism, both ends correspond to the lowermost support layers of the two material trolleys, and two carrier disc lifting mechanisms are arranged in the two positioning frames in a lifting manner to be controlled to move each carrier disc on the material trolley in the positioning frame up and down; when performing printing, the uppermost carrier disc of the material trolley on the first side is moved to the printing mechanism by the first conveying mechanism for printing, the remaining carrier discs of the material trolley on the first side are moved up by one layer by the carrier disc lifting mechanism on the first side; the lowermost carrier disc of the material trolley on the second side is moved to the lowermost support layer of the material trolley on the first side by the second conveying mechanism, the remaining carrier discs of the material trolley on the second side are moved down by one layer by the carrier disc lifting mechanism on the second side; after the printing of the carrier disc is completed, the carrier disc is moved to the uppermost support layer of the material trolley on the second side by the first conveying mechanism, and each carrier disc is sequentially and circularly moved until the printing of each carrier disc is completed.

2. The stacked screen printing machine according to claim 1, wherein the carrier disc lifting mechanism comprises a plurality of claw groups, a plurality of claw extension and retraction driving units, and a plurality of claw lifting driving units; each claw group is arranged on opposite sides of the material trolley, each claw group has a plurality of claws corresponding to each support layer of the material trolley; each claw extension and retraction driving unit is connected to each claw group to drive each claw group to move towards or away from the material trolley; and each claw lifting driving unit is connected to each claw group to drive each claw group to move up and down in the vertical direction.

3. The stacked screen printing machine according to claim 1, wherein each material trolley has two detachable support groups on opposite sides, each support group has a plurality of support pieces arranged in an upper and lower manner and extending inwardly; each support layer is formed between each support piece, so that when each carrier disc is arranged on the support layer, the bottom of each carrier disc is supported on each support piece.

4. The stacked screen printing machine of claim 1, wherein the carrier lifting mechanism further comprises two clamping units and two clamping driving units; the two clamping units are respectively arranged at the bottom of the positioning frame and correspond to the two connecting portions of the two support groups of the material trolley, and the two clamping driving units are movably connected to the two clamping units to drive the two clamping units to clamp the two connecting portions and move in the direction of approaching or moving away from the material trolley, so that the two support groups can be separated outwardly from the material trolley or reset inwardly.

5. The stacked screen printer of claim 1, characterized by The positioning frame further comprises a trolley positioning mechanism having two handles arranged at opposite sides of the positioning frame and movable between an open position and a closed position to be operated to move from the open position to the closed position when the material trolley enters the positioning frame, so as to limit the material trolley from leaving the positioning frame.

6. The stacked screen printing machine of claim 1, wherein the positioning frame further comprises a trolley lifting mechanism having a plurality of positioning claws and a plurality of positioning claw driving units; each positioning claw is movably arranged at a corner of the positioning frame and corresponds to a positioning hole at the bottom of the material trolley, and each positioning claw driving unit is movably connected to one end of each positioning claw to drive each positioning claw to extend and retract and ascend, so that when the material trolley enters the positioning frame, each positioning claw can extend into each positioning hole of the material trolley to form a fixation, and ascend to lift the material trolley to a predetermined height.

7. The stacked screen printing machine of claim 1, wherein the first conveying mechanism has two tracks, two transmission members, two carrier driving units, two hooks and two pushers; the two tracks are respectively arranged at opposite sides of the printing mechanism, the two transmission members are respectively arranged in the two tracks to be driven by a power source to rotate in a rotating direction, the two carrier driving units are movably arranged in the two tracks and connected to the two transmission members to be driven by the two transmission members to move along the two tracks, the two hooks are arranged at one side of the two carrier driving units to hook the carrier at the uppermost of the material trolley on the first side and move the carrier to the printing mechanism with the transmission members, and the two pushers are arranged at the other side of the two carrier driving units opposite to the two hooks to push the carrier at the printing mechanism to move to the support layer at the uppermost of the material trolley on the second side.

8. The stacked screen printing machine of claim 1, wherein the second conveying mechanism has a conveying belt and a conveying belt lifting unit; the conveying belt is driven to rotate in a rotating direction, and the conveying belt lifting unit is arranged at the bottom of the conveying belt to drive the conveying belt to move up and down, so that the height of the conveying belt moves to correspond to the support layer at the lowermost of the two material trolleys.

9. The stacked screen printing machine of claim 1, further comprising a drying mechanism arranged at one side of the positioning frame to be controlled to perform drying operation on the carriers in the two material trolleys.

10. The stacked screen printer of claim 1, characterized by The printing mechanism comprises a printing seat and a printing seat lifting device; the printing seat is used for placing the carrier disc, and the printing seat lifting device is movably connected to the printing seat and used for driving the printing seat to move along the Z-axis direction to control the height of the printing seat.

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