Automatic cloth printing method and automatic printing machine

Abstract

The present invention discloses an automatic cloth printing method and an automatic printing machine, which perform multi-layer transfer through a multi-layer automatic transfer mechanism before the next silk screen printing, thereby extending the transfer time after the silk screen printing of the printed cloth. The method can realize the natural drying of ink during the multi-color silk screen printing process without the need for separate drying, thereby improving the printing efficiency and reducing energy consumption; the equipment can automatically complete the cloth loading, silk screen printing transfer, and cloth unloading, thereby saving labor and reducing printing costs.

Description

Technical Field

[0001] The invention relates to a cloth screen printing device, in particular to an automatic cloth printing method and an automatic printing machine. Background Art

[0002] With the advancement of science, there are many methods and devices for multi-color printing of fabrics, but the method / device with the lowest printing cost and the most stable printing effect is to form multi-color patterns or color patterns through multiple single-color screen printing. Due to multiple single-color screen printing, if the screen printing ink is not dry before the next screen printing, ink adhesion will occur, resulting in damage to the pattern of the printed cloth (cloth to be screen printed), damage to the screen printing screen, and even scrapping of the screen printing equipment. Therefore, the previous method to solve this problem is usually to dry it in the sun after one screen printing or to add a high-power hot air blower between two screen printing mechanisms to blow hot air to dry the printed cloth. The disadvantages of these two methods are: drying in the sun after one screen printing requires a lot of time and a lot of manpower to transfer and dry the printed cloth, which occupies a large area; adding high-power drying equipment to dry the printed cloth during the two screen printing processes consumes a lot of electricity (usually the power of each drying station is more than 3 kilowatts), which invisibly greatly raises the printing cost. Summary of the invention

[0003] The main technical problem to be solved by the present invention is to provide an automatic cloth printing method and an automatic printing machine, which can realize natural drying of ink during the multi-color silk screen printing process without the need for separate drying, thereby improving printing efficiency and saving energy consumption.

[0004] In order to solve the above technical problems, the present invention provides a method for automatic printing of cloth, wherein the printed cloth is adhered to a plate with a self-adhesive sticker and is transferred between a plurality of monochrome screen printing mechanisms together with the plate to respectively print pictures and texts, and the pictures and texts printed on the printed cloth by each monochrome screen printing mechanism are composited to form multi-color or color pictures and texts, and the method flow is as follows:

[0005] Step a: attach the printed cloth to one side of the board with the adhesive sticker;

[0006] Step b, transferring the plate to the screen printing mechanism;

[0007] Step c: After screen printing, the board is transferred to the subsequent station through a multi-level automatic transfer mechanism. The board will not encounter the next processing station until it has been transferred to at least 6 levels;

[0008] Step d, repeat the above steps b and c at least once, and transfer the color to the screen printing mechanism each time in a different color;

[0009] Step e, transferring the plate to the cloth unloading station to separate the printed cloth from the plate body;

[0010] Step f, the plate body is transferred back to the cloth loading station of step a through another path;

[0011] In the above steps, multiple plates are simultaneously transferred in multiple levels between the steps.

[0012] The present invention also provides an automatic printing machine, including a plurality of printed cloths and a plurality of plates with self-adhesive stickers, and also includes a sequentially arranged cloth loading station for adhering the printed cloths to the plates, a multicolor screen printing station for transferring the plates and performing multiple single-color screen printings during the transfer process, and a cloth unloading station for separating the printed cloths from the plates; and also includes a manipulator located above for transferring the cloth-free plates to the cloth loading station, and an empty plate return station for transferring the cloth-free plates after being unloaded at the cloth unloading station to the manipulator. The mechanism realizes the adhesion, separation and automatic screen printing of the printed cloths and the plates, and the multicolor screen printing station can transfer the plates and perform multiple single-color screen printings during the transfer process, and the ink can be dried naturally during the transfer process.

[0013] The beneficial effects of the present invention are: an automatic cloth printing method and an automatic printing machine, which can realize the natural drying of ink during the multi-color silk screen printing process without the need for separate drying, thereby improving printing efficiency and saving energy consumption. The equipment automatically completes cloth loading, silk screen printing, and cloth unloading, saving labor and reducing printing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an overall layout diagram of an embodiment of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the multi-color screen printing station;

[0016] Figure 3 This is a schematic diagram of the structure of the internal board transfer part of the multi-color screen printing station;

[0017] Figure 4 It is a three-dimensional structural diagram of a pair of linked straight chain;

[0018] Figure 5 Specific transfer schematics for the screen printing station;

[0019] Figure 6 It is a schematic diagram of the structure of the cloth loading station;

[0020] Figure 7 It is a three-dimensional schematic diagram of the partial structure of the upper manipulator and scraper mechanism of the cloth loading station;

[0021] Figure 8 It is a schematic diagram of the structure of the claw body of the manipulator;

[0022] Fig. 9 It is a schematic diagram of the local structure of the scraper mechanism;

[0023] Fig.10The figure is a schematic structural diagram of an embodiment of a four-color automatic printing machine of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0025] Please refer to Figures 1 to 10 As shown, a method for automatic cloth printing is provided, in which the printed cloth is adhered to a plate with a self-adhesive sticker (which can be called a platen adhesive, which has continuous stickiness and will not dry out, and can continue to adhere to another printed cloth after one printed cloth is peeled off) and is transferred between multiple monochrome screen printing mechanisms for printing of pictures and texts respectively, and the pictures and texts printed on the printed cloth by each monochrome screen printing mechanism are composited to form multi-color or color pictures and texts, and the method flow is as follows:

[0026] Step a: Install the cloth, and automatically adhere the printed cloth to one side of the board with the adhesive sticker;

[0027] Step b, transferring the plate to the screen printing mechanism; the plate adheres to the printing cloth, which is equivalent to the back plate of the printing cloth, and the screen of the screen printing mechanism only needs to be close to the printing cloth to scrape the ink and then separate.

[0028] Step c, after screen printing, the board is transferred to the subsequent station through a multi-level automatic transfer mechanism. The board will encounter the next processing station only after transferring at least 6 levels; the multi-level automatic transfer extends the time for each board to reach the next processing station, during which time the ink is fully dried, and there is no need to transfer the board to other places, which does not affect the normal processing process and improves efficiency.

[0029] Step d, repeating the above steps b and c at least once, each time transferring the printed material to the screen printing mechanism to be of a different printing color; thereby achieving drying and multi-color screen printing.

[0030] Step e, transferring the plate to the cloth unloading station to separate the printed cloth from the plate body;

[0031] Step f, the plate body is transferred back to the cloth loading station of step a through another path;

[0032] In the above steps, multiple plates are transferred in multiple levels in sequence between the steps at the same time; the best situation is that there is a plate being transferred in each level, in which case the equipment utilization rate is the highest and the production efficiency is the greatest.

[0033] During implementation, in step c, the time taken for the plate to transfer at least 6 layers is greater than the time taken for the silk-screen printing ink to dry.

[0034] During implementation, in step d, the number of times of repeating steps b and c is 2 to 8 times, corresponding to 3-color to 9-color screen printing.

[0035] For example, in step d, the number of times steps b and c are repeated in the three implementation schemes is 2 times, 4 times or 8 times, and the corresponding three implementation schemes are 3-color silk screen printing, 5-color silk screen printing or 9-color silk screen printing.

[0036] During implementation, the step a can be achieved by an automatic cloth loading mechanism, which controls the plate body to be close to the adhesive printed cloth, then smoothes it through the mechanism, and then transfers the plate body away.

[0037] During implementation, the step e can be performed by an automatic cloth unloading mechanism to peel off the printed cloth from the plate body and collect it;

[0038] During implementation, step f can be achieved through an automatic empty plate return mechanism, for example, a robot clamps the plate without printed cloth and places it into a transfer mechanism to transfer the plate back to the cloth loading station.

[0039] When implemented, the unloading station can be directly above the last transfer level (refer to Fig.10 ).

[0040] During implementation, the multi-level automatic transmission mechanism can be an existing straight plate chain, where each straight plate of the straight plate chain is used as a support drag for supporting the plate body. The straight plate chain is a closed loop structure. The number of straight plates on one side of the straight plate chain is the number of levels for the shelving plate body. For details, please refer to the equipment description below. This method is simple, compact, reliable and low-cost.

[0041] The present invention also provides an automatic printing machine, such as Figure 1 Figure 2 As shown, an automatic printing machine includes a plurality of printed cloths and a plurality of plates 7 with self-adhesive stickers, and also includes a cloth loading station 1 arranged in sequence for adhering the printed cloths to the plates 7, a multi-color screen printing station 2 for transferring the plates 7 and performing multiple single-color screen printings during the transfer process, and a cloth unloading station 3 for separating the printed cloths from the plates 7; and also includes a robot 4 located above for transferring cloth-free plates to the cloth loading station 1, and an empty plate return station 5 for transferring the cloth-free plates after being unloaded at the cloth unloading station 3 to the robot 4. The multi-color screen printing station 2 includes a multi-level automatic transfer mechanism, which transfers the board to the subsequent station after screen printing, and the board will encounter the next processing station only after multi-level transfer. At this time, the ink has been dried during the transfer process; the equipment can extend the transfer time by adding levels or slowing down the transfer speed. This equipment does not need to transfer the board to another place or add a drying mechanism during production, that is, the ink can dry by itself, does not affect the normal processing process, occupies a small space, saves energy, has high production efficiency, and most of the intermediate processes are fully automated.

[0042] There is no upper limit to the number of printed cloths, because the equipment is working and the printed cloths are constantly consumed; the maximum number of the plate bodies 7 is the sum of the number of all levels in all multi-level automatic transfer mechanisms in the equipment plus the sum of the number of plate bodies in the empty plate return station 5 and the corresponding manipulator 4 and other transfer positions, so that full-load production can be achieved with high efficiency and small space occupation. The more the number of plate bodies 7, the more transfer levels (plate body synchronous transfer space) are added, which can extend the plate body transfer time and allow the screen printing ink to have a longer drying time.

[0043] Reference Figure 2 As shown, during implementation, the multi-color screen printing station 2 is divided into at least three transfer parts 201, 202, 203, and a screen printing mechanism 21, 22, 23 is arranged above each transfer part; each transfer part includes a lower transfer plate area and an upper transfer plate area, the upper transfer plate area 2012 of the first transfer part 201 is adjacent to the lower transfer plate area 2021 of the second transfer part 202, and the upper transfer plate area 2022 of the second transfer part 202 is adjacent to the lower transfer plate area 2031 of the third transfer part 203; at the bottom of the multi-color screen printing station 2 In the lower part of the upper screen printing mechanism of the multi-color screen printing station 2, there is also a lower transfer plate mechanism 212 for transferring the plate body of the lower transfer plate area in each transfer part to the upper transfer plate area; in the lower part of the upper screen printing mechanism of the multi-color screen printing station 2, there is also a cross-transfer plate mechanism 211 for transferring the plate body of the upper transfer plate area in each transfer part to the lower transfer plate area of ​​the next transfer part; each lower transfer plate area and each upper transfer plate area contain at least 3 plates. The synchronous transfer space, that is, the plate body is transferred at least 6 levels or 6 times before reaching the next screen printing station (the last time is to transfer to the cloth unloading station 3). The more levels or times the plate body is transferred, the more time the screen printing ink on the printed cloth (cloth) has to dry. In theory, the more time the better, but in fact, as long as it is sufficiently dry and does not affect the next screen printing, it is sufficient.

[0044] When implementing, refer to Figure 1 Figure 6 As shown, a transition station 6 is also included on the right side of the cloth loading station 1. After the printed cloth is adhered to the board 7 of the cloth loading station 1, the board is flipped to the transition station through a flipping mechanism. The transition station has a supporting mechanism to support the board, and then the board 7 is lifted up from the supporting mechanism through a cross-part transfer plate mechanism 211 and transferred to the multi-color silk-screen printing station 2 for the first silk-screen printing.

[0045] like Figure 2 , Figure 5 , Fig.10As shown, the number of transfer parts is increased according to the need for multi-color screen printing (the number of transfer parts is the same as the number of colors), and the last transfer part 20N is transferred backward to the cloth unloading station 3. The cross-part transfer plate mechanism 211 and the lower transfer plate mechanism 212 can be an integral mechanism that spans each transfer part at the same time. For example: the lower transfer plate mechanism 212 is an integrated mechanism (support frame) driven by a cylinder and extending from the lower transfer plate area 2011 of the first transfer part 201 to the lower transfer plate area 20N1 of the last transfer part 20N (this area can be directly located in the cloth unloading station 3). The lower transfer plate mechanism 212 is provided with a corresponding unit of a bearing plate body 7 corresponding to each lower transfer plate area. When the plate body transferred downward by each lower transfer plate area reaches the corresponding unit of the bearing plate body, the cylinder works to push the lower transfer plate mechanism 212 to the right, so that each plate body 7 on the lower transfer plate mechanism 212 reaches directly below the adjacent upper transfer plate area. At the same time, a lifting mechanism (which can be a cylinder) is also provided corresponding to the lower transfer plate mechanism 212. At this time, the lifting mechanism lifts the lower transfer plate mechanism 212 as a whole, so that all the plate bodies 7 are correspondingly embedded in the bottom layer of the straight plate chain 8 of each upper transfer plate area, and then start to transfer upward; then the lower transfer plate mechanism 212 descends and resets to the left. Correspondingly, the cross-part transfer plate mechanism 211 is an integrated mechanism (support frame) driven by a cylinder and extending from the top of the lower transfer plate area 20N1 of the last transfer part 20N to the lower transfer plate area 2011 of the first transfer part 201 (when the cloth unloading station 3 is a station independent of the multi-color screen printing station 2, the right side of the cross-part transfer plate mechanism 211 can be extended to the cloth unloading station 3 to facilitate the plate body transfer). In the horizontal direction, the cross-part transfer plate mechanism 211 can be moved to the left by 1 / 2 of the length of the transfer part (i.e., equal to the length of an upper transfer plate area or a lower transfer plate area) under the action of the cylinder, and in the height direction, there is a corresponding lifting mechanism (which can be a cylinder) that can lift the cross-part transfer plate mechanism 211 to a certain height. Under normal circumstances, the left end of the cross-part transfer plate mechanism 211 is located below the transition station 6.When the plate body 7 of the cloth loading station 1 is turned over to the transition station 6 and is supported by the supporting mechanism, the cross-transfer plate mechanism 211 then lifts up the plate body, and at the same time, the plate bodies transferred to the upper end by the upper transfer plate areas of the transfer parts 201, 202, 203 ... 20N on the right side are also lifted up by the cross-transfer plate mechanism 211 and separated from the straight plate chains 8; then the horizontal cylinder acts to move the cross-transfer plate mechanism 211 to the right by 1 / 2 of the length of the transfer part (the lifting mechanism is still in the lifting state), and the plate body 7 of the transition station 6 enters the first screen printing mechanism 21 just below the first screen printing mechanism 21, and the plate body at the upper end of the upper transfer plate area 2012 of the first transfer part 201 enters the second screen printing mechanism 21. The plate body at the upper end of the upper transfer plate area 2022 of the second transfer part 202, directly below the printing mechanism 22, enters directly below the third screen printing mechanism 23... The plate body at the upper end of the upper transfer plate area of ​​the N-1 transfer part 20N-1 enters directly below the Nth screen printing mechanism 2N; then, each screen printing mechanism presses the plate body for screen printing; thereafter, the lifting mechanism resets (descends), and the cross-part transfer plate mechanism 211 descends so that each plate body is placed on the corresponding straight plate chain 8 of each lower transfer plate area; the horizontal cylinder resets, and the left end of the cross-part transfer plate mechanism 211 returns to the bottom of the transition station 6, and each plate body is synchronously transferred downward under the action of the straight plate chain 8 of each lower transfer plate area.

[0046] When implementing, Figure 3 , 4 As shown, the transmission part transmits the plate body through the straight plate chain 8, and the straight plate chain 8 forms a chain closed loop. The straight plates (801, 802, 803...) evenly distributed on the straight plate chain 8 are used as support blocks (for supporting the plate body) with a corresponding number of layers spaced apart from each other. The spacing between the straight plates and the number of settings can be adjusted according to needs during production; the chain closed loop is supported by two gears 9 of equal diameter on the inner periphery of the straight plate chain 8 and driven to rotate at a uniform speed. The two straight vertical parts of the straight plate chain formed after the support of the two gears 9 serve as the working parts for the transmission of the plate body 7. Every four straight plate chains 8 (see Figure 4 , two straight plate chains 8 and gears 9 arranged side by side inside and outside are coaxially connected in pairs, linked to form a pair, and two adjacent pairs cooperate with each other) four straight plates of corresponding height cooperate to form a plate body transmission level, and one level can hold a plate body 7; each transmission part (201, 202, 203...20N) includes three pairs of such straight plate chains 8, and the junctions of two adjacent transmission parts share a pair of straight plate chains. From left to right, each adjacent pair of straight plate chains rotates in opposite directions clockwise, counterclockwise, clockwise, and counterclockwise respectively. The rotation speed of each straight plate chain 8 is the same, and each straight plate on the adjacent straight plate chain is also one-to-one at the same height to ensure a flat shelf plate body. The rotation speed adjustment of each straight plate chain is unified, simultaneous, and synchronous. Specifically, the action synchronization between each pair of straight plate chains 8 can also be achieved through chain transmission.

[0047] Specifically, there must be at least 7 straight plates on the straight plate chain 8, so as to ensure that the plate body reaches the next screen printing station after being transmitted 6 times / layers, so that there is a certain ink drying time and the plate body transmitted synchronously by screen printing has a certain volume. Of course, in principle, the more straight plates there are on the straight plate chain 8, the larger the production volume / the higher the efficiency, and the faster the screen printing speed of the screen printing mechanism is, the more meaningful it is. Of course, a large number of straight plates are set, but it is also possible to use straight plates at intervals during production. The number of straight plates required to support a plate body can be adjusted according to needs.

[0048] When implementing, Figure 1 , Figure 6 As shown, the cloth loading station 1 comprises a turning frame 11 located at the upper part for embedding the plate body (there are several protrusions on the inner edge, so that the bottom surface of the plate body is exposed as a whole and contacts the printed cloth after the plate body is embedded, and will not slide down from the lower part of the turning frame 11), a cloth placing area 12 located at the lower part for placing the printed cloth and transferring the printed cloth upward (the cloth placing area 12 holds a stack of printed cloths and slightly moves upward, so that the top printed cloth adheres to the plate body in the turning frame 11), and a scraper mechanism 10 is also provided between the turning frame 11 and the cloth placing area 12 for flattening the printed cloth after the printed cloth is adhered to the plate body 7. After the printed cloth is adhered to the plate body 7, the cloth placing area 12 drives other printed cloths to move downward, and then the scraper mechanism 10 adheres to the plate body and moves from one side to the other side and then returns, and the scraper mechanism 10 ensures that only one printed cloth is on the plate body 7 and is adhered flatly.

[0049] like Figure 1 , 6 As shown in , 7 and 8 , the robot 4 is used to clamp the board body from the empty board return station 5 and embed it into the flip frame 11 .

[0050] When implementing, Figure 7 , Fig. 9 As shown, the specific scraper mechanism 10 includes a double screw mechanism 102, a scraper bracket 101 with both ends positioned on the screw mechanism, and a roller 103 with a certain friction coefficient is arranged at the front of the scraper bracket 101 horizontally, and a V-shaped scraper 104 is arranged at the rear. The scraper mechanism 10 is attached to the plate body and moves, and the roller 103 is first attached to the printed cloth (plate body support) and rolls to prevent the electrostatic adsorption of multiple layers of printed cloth on the first layer of printed cloth; then the V-shaped scraper 104 is reversely attached to the printed cloth (plate body support) and scraped to make the printed cloth and the adhesive on the plate body 7 adhere smoothly.

[0051] When implementing, Figure 1 Figure 6As shown, the cloth loading station 1 further includes a transition station 6 located on the right side thereof, and the transition station 6 is used to: after the printed cloth is adhered to the plate body 7 in the flip frame 11 of the cloth loading station 1, the plate body 7 is received when the flip frame 11 flips and pours out the plate body 7, so as to transfer the plate body to the multi-color screen printing station 2 in the next process. Specifically, four protrusions 601 are provided on the upper side of the transition station 6, and the rear edge of the plate body 7 in the flip frame 11 is just placed on the protrusions 601. When the plate body 7 is flipped, the printed cloth originally located at the lower part is flipped to the upper part, and the printed cloth can be directly printed at the next screen printing station.

[0052] like Figure 5 As shown, the lower transfer plate mechanism 212 includes a support frame for supporting multiple plates transferred downward from each lower transfer plate area, a cylinder whose driving end is connected to the support frame and used to drive the support frame to move horizontally left and right, and a lifting mechanism for extending the support frame. The lifting mechanism has the following functions during operation: rising to make the support frame close to support the plate separated from the lower transfer plate area, descending to transfer the plate to the lower part of the upper transfer plate area under the action of the cylinder, and then rising again to make each plate embedded in the support drag block of the straight plate chain 8 of the upper transfer plate area, and then descending again.

[0053] like Figure 5 As shown, the cross-part transfer plate mechanism 211 includes a support frame for supporting the plate body of the cloth loading station 1 and multiple plate bodies transferred from the top of each upper transfer plate area, a cylinder connected to the support frame at the driving end for driving the support frame to move horizontally left and right, and a jacking mechanism for extending the support frame. The functions of the jacking mechanism during operation are: lifting to separate the plate body at the upper end of the upper transfer plate area from the straight plate chain, then the cylinder pulls the plate body to move to the next screen printing station, and continues to lift the plate body to attach to the screen printing mechanism for screen printing. After the screen printing is completed, the jacking mechanism descends again to embed the plate body into the upper part of the straight plate chain of the lower transfer plate area.

[0054] like Fig.10 As shown (for Fig.10 For unmarked numbers, please refer to Figure 1-Figure 9), an automatic printing machine embodiment, including four screen printing mechanisms (four colors), corresponding to four transfer parts, the right half of the fourth transfer part and the upper transfer plate area and its upper part are also used as a cloth unloading station 3 (that is, after the ink is dried, the plate body is clamped by a robot, and another robot peels off and collects the printed cloth, and the plate body without printed cloth is transferred to the empty plate return station 5 and transferred back to the robot 4 for loading the plate), the leftmost robot 4 clamps the plate body 7 and loads it into the flip frame 11, the cloth placing area 12 lifts a stack of printed cloth to contact the plate body, the top layer of printed cloth is attached to the self-adhesive sticker of the plate body, the cloth placing area 12 descends, and the scraper mechanism 10 is attached to the plate body and moves to make the printed cloth a single layer And it is attached flat, flip the flip frame 11, and the plate falls into the transition station 6 and is supported by four protrusions 601; at this time, all the straight plate chains 8 on the right side are synchronously and intermittently rotating (interval time = silk screen time + plate body crossing area transfer time + preset static time), each level of the straight plate chain 8 has a plate body being transferred, and the cross-section transfer plate mechanism 211 rises to lift the plate body of the transition station 6 from the four protrusions 601, and at the same time, the three plate bodies at the upper ends of the first three upper transfer plate areas on the right are also lifted up by the cross-section transfer plate mechanism 211 at the same time, the cross-section transfer plate mechanism 211 moves right four plate bodies just under the four silk screen printing mechanisms, and then lifts the cross-section transfer plate mechanism 211. The plate delivery mechanism 211 or the screen printing mechanism descends, the printed cloth on the plate body contacts the screen, and the screen printing mechanism scrapes the ink to complete the screen printing. The cross-transfer plate mechanism 211 descends to separate the plate body from the screen printing mechanism until the four plate bodies are respectively placed on the four straight plates of the four straight plate chains in the lower transfer plate area. The cross-transfer plate mechanism 211 descends again and then moves left by 1 / 2 of the length of the transfer part to avoid hindering the plate body from being transferred downward. The plate body is transferred downward by one level, and a plate body is also separated from the bottom of the corresponding four lower transfer plate areas. At this time, the lower transfer plate mechanism 212 rises to support the four plate bodies, and then the lower transfer plate mechanism 212 descends and moves right by 1 / 2 of the length of the transfer part. After the length is reached, it rises again to embed the four plates into the bottom of the four upper transfer plate areas respectively, and the lower transfer plate mechanism 212 descends and resets; because the transfer between the upper transfer plate area and the lower transfer plate area is also synchronized, so during the period from the detachment of the four plates in the lower transfer plate area to the detachment of the lower four plates, the upper transfer plate area must also have four plates running to the top and one plate flipping to the transition station 6. The cross-transfer plate mechanism 211 is required to transfer the first four plates (the last plate is unloaded), so the operation of the cross-transfer plate mechanism 211 and the lower transfer plate mechanism 212 is synchronized, and the difference will not exceed half a layer transfer cycle at most.

[0055] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A method for automatic printing of fabrics, characterized in that: The printed cloth is adhered to the plate with the adhesive and is transferred between multiple monochrome screen printing mechanisms together with the plate to print pictures and texts respectively. The pictures and texts printed on the printed cloth by each monochrome screen printing mechanism are combined to form multi-color pictures and texts. The method process is as follows: Step a: attach the printed cloth to one side of the board with the adhesive sticker; Step b, transferring the plate to the screen printing mechanism; Step c, after screen printing, the board is transferred to the subsequent station through the transfer unit, and the board will not meet the next processing station until it has transferred at least 6 levels; the time taken for the board to transfer at least 6 levels is greater than the time it takes for the ink of the screen printing image to dry; Step d, repeat the above steps b and c at least once, and transfer the color to the screen printing mechanism each time in a different color; Step e, transferring the plate to the cloth unloading station to separate the printed cloth from the plate body; Step f, the plate body is transferred back to the cloth loading station of step a through another path; In the above steps, a plurality of plates are transferred in a multi-level sequence between the steps at the same time. The automatic printing machine comprises at least three transfer parts (201, 202, 203), and a screen printing mechanism (21, 22, 23) is arranged above each transfer part; each transfer part comprises a lower transfer plate area and an upper transfer plate area, the upper transfer plate area (2012) of the first transfer part (201) is adjacent to the lower transfer plate area (2021) of the second transfer part (202), and the upper transfer plate area (2022) of the second transfer part (202) is adjacent to the lower transfer plate area (2031) of the third transfer part (203); the transfer part transfers the plate body through a straight plate chain (8); each straight plate of the straight plate chain is used as a support to support the plate body, and the straight plate chain is a closed loop structure. The number of straight plates on one side of the straight plate chain is equal to the number of levels of the plate bodies.

2. The automatic cloth printing method according to claim 1, characterized in that: In the step d, the number of times of repeating the above steps b and c is 2 to 8 times, corresponding to 3-color to 9-color screen printing.

3. An automatic printing machine, comprising a plurality of printing cloths and a plurality of plates (7) with adhesive labels, characterized in that: It also includes a cloth loading station (1) for adhering the printed cloth to the plate body (7), a multi-color screen printing station (2) for transferring the plate body (7) and performing multiple single-color screen printing during the transfer process, and a cloth unloading station (3) for separating the printed cloth from the plate body (7), which are arranged in sequence; it also includes a robot (4) located above the cloth loading station (1) for transferring a cloth-free plate body to the cloth loading station (1), and an empty plate return station (5) for transferring the cloth-free plate body after the cloth is unloaded at the cloth unloading station (3) to the robot (4); a cross-part transfer plate mechanism (211) is also provided at the lower part of the upper screen printing mechanism of the multi-color screen printing station (2) for transferring the plate body of the upper transfer plate area in each transfer part to the lower transfer plate area of ​​the next transfer part; the multi-color screen printing station (2) is divided into at least three transfer parts (201, 202, 203), and a screen printing mechanism (21, 22, 23) is provided above each transfer part; Each transfer part includes a lower transfer plate area and an upper transfer plate area, the upper transfer plate area (2012) of the first transfer part (201) is adjacent to the lower transfer plate area (2021) of the second transfer part (202), and the upper transfer plate area (2022) of the second transfer part (202) is adjacent to the lower transfer plate area (2031) of the third transfer part (203); at the lower part of the multi-color screen printing station (2), a lower transfer plate mechanism (212) is also provided for transferring the plate body of the lower transfer plate area in each transfer part to the upper transfer plate area thereof; each lower transfer plate area and each upper transfer plate area include at least three plates for synchronous transfer; the cross-part transfer plate mechanism (211) includes a support frame for supporting the plate body of the cloth loading station (1) and a plurality of plates transferred from the top of each upper transfer plate area, a cylinder having a driving end connected to the support frame for driving the support frame to move horizontally left and right, and a lifting mechanism for extending the support frame.

4. The automatic printing machine according to claim 3, characterized in that: The transmission part transmits the plate body through a straight plate chain (8), and each straight plate chain (8) is supported by two gears (9) of equal diameter on its inner periphery; the gears (9) of each two parallel straight plate chains (8) are coaxially connected to form a pair of straight plate chains (8); each transmission part includes three pairs of such straight plate chains (8), and two adjacent transmission parts share a pair of straight plate chains (8) at their junctions, and from left to right, each pair of adjacent straight plate chains (8) rotates in the opposite directions clockwise, counterclockwise, clockwise, and counterclockwise respectively; the cloth loading station (1) includes a turning frame (11) located at the upper part for embedding the plate body (7), and a cloth placing area (12) located at the lower part for placing the printed cloth and transferring the printed cloth upward, and a scraper mechanism (10) is also provided between the turning frame (11) and the cloth placing area (12) for flattening the printed cloth after the printed cloth is attached to the plate body (7).

5. The automatic printing machine according to claim 4, characterized in that: The cloth loading station (1) further comprises a transition station (6) located on the right side thereof, wherein the transition station (6) is provided with four protrusions (601) for catching the plate body when the flip frame (11) flips over and pours out the plate body.

6. The automatic printing machine according to claim 4, characterized in that: The lower transfer plate mechanism (212) comprises a support frame for supporting a plurality of plate bodies transferred downward from each lower transfer plate area, a cylinder whose driving end is connected to the support frame and is used to drive the support frame to move horizontally left and right, and a lifting mechanism for extending the support frame.

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