High-precision row transfer printing method and equipment

Abstract

The invention provides a high-precision row transfer printing method and equipment, the high-precision row transfer printing equipment comprises a directional conveying transfer printing turnover bottom plate on a conveying line, a female die visual detection device, a transfer printing device and a rubber head visual detection device, the female die visual detection device comprises a first Y driver, the first Y driver drives an upper visual camera in a translation manner, and the upper visual camera is erected above the conveying line; the transfer printing device comprises a base, a transfer printing steel plate is fixedly arranged on the base, an ink box is driven above the transfer printing steel plate in a reciprocating mode, and a row rubber head mechanism is driven on the base through translation of an X driver. The rubber head visual detection device comprises a second Y driver located between the transfer printing steel plate and the conveying line, the second Y driver drives a lower visual camera in a translation mode, and the row rubber head mechanism is erected above the transfer printing steel plate and the lower visual camera. A plurality of single processing stations are integrated and independently driven, and can be independently adjusted according to different position deviation degrees, so that independent correspondence is ensured according to individual differences.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a pad printing technology, in particular to a high-precision row pad printing method and equipment. Background Art

[0002] In the application field of pad printing technology for medical and electronic products, the current pad printing devices are all for single product processing. The low processing rate affects the product production efficiency. In addition, the production is all mechanically positioned, which makes it easier to produce products with color deviations, and thus the product quality cannot be stably controlled.

[0003] For example, Chinese patent document 202410673133.9 discloses a side pad printing process for Mini & Micro-LED substrates. The side pad printing process for Mini & Micro-LED substrates includes the steps of scraping ink with an ink cup, taking ink with a rubber head, pressing ink, cleaning ink with a rubber head, and curing ink. According to the pad printing width of the substrate, the width and depth of the steel groove of the steel plate etching steel groove are determined, the ink is scraped by moving the ink cup to leave the ink in the steel groove, the rubber head is moved to the top of the steel groove, the appropriate pressing height is determined, the rubber head is moved to dip the ink in the steel groove, the rubber head is moved to the top of the edge of the substrate, the appropriate pressing position and pressing height are determined, the ink of the rubber head is printed on the edge of the substrate and wraps the front / back and part of the side of the substrate, the ink remaining on the surface of the rubber head is cleaned, and the ink is cured on the surface of the substrate at high temperature.

[0004] Although the pad printing process is disclosed in the above technical solution, during the pad printing process, the pad head and the ink position on the substrate often shift and misalign, resulting in large pad printing errors and poor precision, affecting the yield rate and finished product quality. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose a high-precision pad printing method and device.

[0006] The object of the present invention can be achieved by the following technical solutions: A high-precision pad printing method comprises the following steps:

[0007] S1. When loading the machine, the center point of each pad pattern on the pad printing steel plate is collected as the reference point for each pad head;

[0008] S2, obtaining the initial coordinates of each pad, starting the X-drive to translate the row of pad mechanisms to displace each pad by a distance K along the X direction according to the corresponding reference point, so that each pad leaves the space directly above the pad printing plate to make room for the ink cartridge;

[0009] S3, starting the servo mechanism to drive the ink cartridge to move horizontally from the front end to the rear end of the pad printing steel plate, and applying ink on each pad printing pattern during the movement to complete the ink supply;

[0010] S4, start the Y drive to drive the upper visual camera to move horizontally above the pad printing turnover bottom plate to detect the position of each concave mold;

[0011] S5, start the X driver to translate the row of rubber heads so that each rubber head corresponds to the top of each pad printing pattern, start the Z telescope to drive the rubber head downward to contact the pad printing pattern to transfer the ink pattern, start the Z telescope to lift the rubber head away from the pad printing steel plate, start the X driver to drive the row of rubber heads to translate to the top of the lower visual camera, and detect the position of each rubber head;

[0012] S6. Determine the deviation size of the position of the die and the rubber head one by one, select the alignment rubber head whose deviation size is smaller than the critical deviation size, drive the alignment rubber head to transfer the ink to the corresponding die to complete the first transfer printing; adjust and correct the remaining misaligned rubber heads whose deviation size is larger than the critical deviation size, and drive the remaining rubber heads to transfer the ink to the corresponding die to complete the second transfer printing.

[0013] Preferably, in step S1, there are 5 pad printing patterns on the pad printing steel plate, and the center point coordinates of the 5 pad printing patterns are (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), and (X5, Y5);

[0014] In step S2, the coupled glue head mechanism has a total of 5 glue heads, and the initial coordinates of the 5 glue heads are (X'1, Y'1), (X'2, Y'2), (X'3, Y'3), (X'4, Y'4), and (X'5, Y'5); according to the reference point and the displacement K distance, the coordinates of the 5 glue heads are adjusted to (X1+k, Y1), (X2+k, Y2), (X3+k, Y3), (X4+k, Y4), and (X5+k, Y5).

[0015] Preferably, in step S4, the coordinates of the five concave dies are (X"1, Y"1), (X"2, Y"2), (X"3, Y"3), (X"4, Y"4), and (X"5, Y"5);

[0016] According to the position of each die detected by the upper visual camera, a is set as the supplementary amount of the die in the X direction, and the adjustment compensation coordinates of the die in the X direction are realized by moving the positioning base as follows:

[0017] (X”1+a,Y”1)\(X”2+a,Y”2)\(X”3+a,Y”3)\(X”4+a,Y”4)\(X”5+a,Y”5);

[0018] Preferably, in step S6, the coordinates of the reference points to which the five rubber heads move are (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), and (X5, Y5); the critical deviation size is set to △f; therefore, the judgment formula is as follows:

[0019] X1-(X”1+a)≤△f, Y”1-Y1≤△f;

[0020] X2-(X”2+a)≤△f, Y”2-Y2≤△f;

[0021] X3-(X”3+a)≤△f, Y”3-Y3≤△f;

[0022] X4-(X”4+a)≤△f, Y”4-Y4≤△f;

[0023] X5-(X”5+a)≤△f, Y”5-Y5≤△f;

[0024] Among the above five groups, when the coordinate deviations of the die and the rubber head are consistent in both the X and Y directions, it is a registered pad printing combination and there is no need to adjust the position;

[0025] Among the above five groups, when the coordinate deviation between the die and the pad does not match in at least one of the X and Y directions, it is a misaligned pad printing combination and needs to be corrected.

[0026] A high-precision row pad printing device comprises a conveyor line, on which a pad printing turnover bottom plate is directional transported, a plurality of concave molds are arranged on a positioning base on the pad printing turnover bottom plate, a concave mold visual detection device, a pad printing device and a rubber head visual detection device are arranged along the conveying direction of the conveyor line, the concave mold visual detection device comprises a Y driver 1, the Y driver 1 translates and drives an upper visual camera, and the upper visual camera is set above the conveyor line; the pad printing device comprises a base, on which a pad printing steel plate is fixed, an ink cartridge is reciprocated above the pad printing steel plate, and a row of rubber head mechanisms are translated and driven on the base by an X driver; the rubber head visual detection device comprises a Y driver 2 located between the pad printing steel plate and the conveyor line, the Y driver 2 translates and drives a lower visual camera, and the row of rubber head mechanisms is set above the pad printing steel plate and the lower visual camera.

[0027] Preferably, the base has a table top, on which the pad printing steel plate is horizontally fixed, and a plurality of pad printing patterns are arranged along the Y direction on the top surface of the pad printing steel plate.

[0028] Preferably, a servo mechanism is installed on the table along the Y direction, and the servo mechanism includes a servo motor. The rotating shaft of the servo motor drives the connecting screw, and the screw is threaded with a nut, and the nut is fixedly connected to a slider. A guide rod is arranged parallel to the side of the screw, and the slider is sleeved on the guide rod to form a sliding connection. The slider is fixedly connected to the ink cartridge through a connecting plate, and the bottom of the ink cartridge is an ink-coated surface, and the ink-coated surface contacts the top surface of the pad printing steel plate.

[0029] Preferably, the X driver comprises a slide electric cylinder and a guide rail arranged along the X direction, the sliding seat of the slide electric cylinder is fixedly connected to a mounting frame, a slider is fixedly arranged at the bottom of the mounting frame, and the slider is clamped on the guide rail to form a sliding connection.

[0030] Preferably, the row of rubber head mechanisms comprises a plurality of pad printing components arranged on the mounting frame, the pad printing components comprising a Z telescope fixedly mounted on the mounting frame, the downward Z telescope end of the Z telescope fixedly connected to the Y telescope, the Y telescope end of the Y telescope fixedly connected to the X telescope, and the X telescope end of the X telescope fixedly connected to the rubber head via a mounting block.

[0031] Preferably, the conveyor line includes a base frame arranged along the Y direction, a transmission motor is fixed on the base frame, a plurality of pulleys are hinged on the base frame along the length direction, a transmission belt is tensioned and sleeved on a plurality of the pulleys, and a rotating shaft of the transmission motor is driven and connected to any of the pulleys.

[0032] Compared with the prior art, the high-precision pad printing method and equipment have the following beneficial effects:

[0033] 1. By integrating multiple single processing stations and driving them independently, independent adjustments can be made for different position deviations to ensure independent correspondence based on individual differences, thus expanding the flexibility and integration of applications and improving production efficiency.

[0034] 2. The position of the product is inspected by upper vision, and the position of the pad printing head is inspected by lower vision. That is, the position of the product and the pad printing pad is quickly located by camera line scanning, and it is determined whether the deviation of each group of relative position is within the allowable range. The first batch of qualified combinations are selected for the first pad printing, and the remaining unqualified combinations are compensated and adjusted for the second pad printing. The coordination of visual positioning and independent pad printing pads will greatly improve the positioning stability of the pad printing process and improve the processing quality yield of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The three-dimensional structure of this high-precision pad printing equipment Figure 1 .

[0036] Figure 2 The three-dimensional structure of this high-precision pad printing equipment Figure 2 .

[0037] Figure 3 This is the side view of the high-precision pad printing equipment.

[0038] Figure 4 The operating principle of this high-precision pad printing equipment Figure 1 .

[0039] Figure 5 The operating principle of this high-precision pad printing equipment Figure 2 .

[0040] Figure 6 The operating principle of this high-precision pad printing equipment Figure 3 .

[0041] Figure 7 The operating principle of this high-precision pad printing equipment Figure 4 .

[0042] Figure 8 It is the center point coordinate of the pad printing pattern in the operation method of this high-precision joint pad printing equipment.

[0043] Fig. 9 The initial coordinates and correction of the pad in the operation method of this high-precision pad printing equipment.

[0044] Fig.10 These are the coordinates of the concave mold in the operation method of this high-precision pad printing equipment.

[0045] In the figure, 1. conveyor line; 2. pad printing turnover base plate; 3. die; 4. Y driver 1; 5. upper visual camera; 6. base; 7. pad printing steel plate; 7a. pad printing pattern; 8. servo mechanism; 9. ink cartridge; 10. slide cylinder; 11. guide rail; 12. mounting frame; 13. pad printing assembly; 13a. rubber head; 14. Y driver 2; 15. lower visual camera. DETAILED DESCRIPTION

[0046] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0047] Embodiment 1

[0048] like Figures 1 to 3As shown, the high-precision row pad printing equipment comprises a conveyor line 1, which is extended along the Y direction. The conveyor line 1 is directed to transport the pad printing turnover base 2, and a plurality of concave molds 3 are arranged on the positioning base on the pad printing turnover base 2. Two rows of concave molds 3 are arranged on each pad printing turnover base 2, and each row has 5 concave molds 3. A concave mold visual inspection device, a pad printing device and a rubber head visual inspection device are arranged along the conveying direction of the conveyor line 1. The concave mold visual inspection device comprises a Y driver 4. The Y driver 4 can adopt a slide table electric cylinder arranged along the Y direction. The Y driver 4 translates and drives the upper visual camera 5. The sliding block of the slide table electric cylinder is fixedly connected to the upper visual camera 5 through a bracket. The visual camera 5 is set up above the conveyor line 1, and the lens of the upper visual camera 5 shoots the pad printing turnover bottom plate 2 downward; the pad printing device includes a base 6, on which a pad printing steel plate 7 is fixed, and an ink cartridge 9 is reciprocatingly driven above the pad printing steel plate 7, and the base 6 is driven by an X driver to translate the row of glue heads; the glue head visual inspection device includes a Y driver 14 located between the pad printing steel plate 7 and the conveyor line 1, and the Y driver 14 can use a slide electric cylinder arranged along the Y direction, and the Y driver 14 translates and drives the lower visual camera 15, and the sliding block of the slide electric cylinder is fixedly connected to the lower visual camera 15 through a support, and the row of glue heads The mechanism is set above the pad printing steel plate 7 and the lower visual camera 15.

[0049] Preferably, the conveyor line 1 includes a chassis arranged along the Y direction, a transmission motor is fixed on the chassis, a plurality of pulleys are hinged on the chassis along the length direction, a transmission belt is tensioned and sleeved on the plurality of pulleys, and the shaft of the transmission motor drives and connects to any pulley. The transmission motor is started to drive the shaft to rotate in a directional manner, and a pulley is synchronously driven to rotate, and the remaining pulleys and the transmission belt are driven to rotate in a directional manner through the friction force, and a plurality of pad printing turnover bottom plates 2 are placed on the belt to realize the directional transportation of the pad printing turnover bottom plates 2. The conveyor line 1 can also realize the directional transportation of the pad printing turnover bottom plates 2 by other existing methods.

[0050] like Figures 1 to 2 As shown, preferably, the base 6 has a table top, on which a pad printing steel plate 7 is horizontally fixed, and a plurality of pad printing patterns 7a are arranged along the Y direction on the top surface of the pad printing steel plate 7. The pad printing steel plate 7 is a consumable material used for etching patterns and used on a pad printing machine. The pad printing pattern 7a is a pattern or text formed on the surface of the substrate by a pad printing process, and there are 5 pad printing patterns 7a in a row.

[0051] Preferably, a servo mechanism 8 is installed on the table along the Y direction, and the servo mechanism 8 includes a servo motor. The rotating shaft of the servo motor drives the connecting screw, the threaded nut on the screw is connected to the nut, the nut is fixedly connected to the slider, a guide rod is arranged parallel to the side of the screw, the slider is connected to the guide rod to form a guide connection, and the slider is fixedly connected to the ink cartridge 9 through a connecting plate. The bottom of the ink cartridge 9 is the ink coating surface, and the ink coating surface contacts the top surface of the pad printing steel plate 7.

[0052] The servo motor is started to drive the lead screw to rotate, and the connecting plate is driven to move back and forth along the guide rod through the threaded engagement transmission, and the ink is applied to the plurality of pad patterns 7a through the ink-coated surface of the ink cartridge 9 passing through the plurality of pad patterns 7a of the pad printing steel plate 7. After the servo mechanism 8 drives the ink cartridge 9 to perform a reciprocating motion, the pad patterns 7a can be inked twice, that is, the ink cartridge 9 moves from the initial position to the end along the pad printing steel plate 7 to form the first ink supply, and when the rubber head 13a contacts the pad pattern 7a to transfer the ink, the ink cartridge 9 returns to the initial position to form the second ink supply, and the above actions are repeated to form a reciprocating ink supply.

[0053] like Figures 1 to 2 As shown, preferably, the X driver includes a slide cylinder 10 and a guide rail 11 arranged along the X direction, the slide seat of the slide cylinder 10 is fixedly connected to the mounting frame 12, a slider is fixedly arranged at the bottom of the mounting frame 12, and the slider is clamped on the guide rail 11 to form a guide connection. The slide cylinder 10 is started to drive the slide seat to drive the mounting frame 12 to move forward and backward, and at the same time, the mounting frame 12 slides linearly forward and backward along the guide rail 11 through the slider, thereby improving the stability of translation.

[0054] Preferably, the row of rubber head mechanisms includes a plurality of pad printing components 13 arranged on a mounting frame 12, the pad printing components 13 including a Z telescope fixedly mounted on the mounting frame 12, the Z telescope end facing downwards of the Z telescope fixedly connected to the Y telescope, the Y telescope end of the Y telescope fixedly connected to the X telescope, and the X telescope end of the X telescope fixedly connected to the rubber head 13a through a mounting block.

[0055] The Y telescopic end is driven by the Y telescopic device to adjust the position of the rubber head 13a in the Y direction. The X telescopic end is driven by the X telescopic device to adjust the position of the rubber head 13a in the X direction. The Z telescopic end is driven by the Z telescopic device to control the rubber head 13a to move downward for printing operation, or to control the rubber head 13a to move upward for separation operation. Specifically, five pad printing components 13 are used, that is, there are five rubber heads 13a that can be operated independently of each other. According to practical needs, 5 rows are used as the optimal number of pad printing.

[0056] Embodiment 2

[0057] Based on the first embodiment, the difference of this embodiment is that:

[0058] An operating method of a high-precision pad printing device is applied to the high-precision pad printing device as above, and the operating method comprises the following steps:

[0059] like Figure 4 As shown, S1, when the machine is on, the center points of each pad printing pattern 7a on the pad printing steel plate 7 are collected as reference points corresponding to each pad head 13a one by one;

[0060] like Figure 4As shown, S2, obtaining the initial coordinates of each rubber head 13a, starting the X-drive translational rubber head mechanism to displace each rubber head 13a by a distance K along the X direction according to the corresponding reference point, so that each rubber head 13a leaves the space just above the pad printing steel plate 7, leaving travel space for the ink cartridge 9;

[0061] like Figure 4 As shown, S3, the servo mechanism 8 is started to drive the ink cartridge 9 to move horizontally from the head end to the tail end of the pad printing steel plate 7, and the ink is applied to each pad printing pattern 7a during the movement to complete the ink supply;

[0062] like Figure 4 As shown, S4, start the Y driver 4 to drive the upper visual camera 5 to move horizontally above the pad printing turnover bottom plate 2 to detect the position of each concave mold 3;

[0063] like Figure 4 As shown, S5, start the X driver to translate the row of rubber heads to make each rubber head 13a correspond to the top of each pad printing pattern 7a, start the Z telescopic device to drive the rubber head 13a downward to contact the pad printing pattern 7a to transfer the ink pattern, start the Z telescopic device to lift the rubber head 13a away from the pad printing steel plate 7, as shown in FIG. Figure 5 As shown, the X driver is started to drive the row of pad heads to move horizontally to above the lower visual camera 15 to detect the position of each pad head 13a; the ink cartridge 9 returns to the initial position, that is, it moves horizontally from the tail end to the head end of the pad printing steel plate 7, and the ink is applied to each pad printing pattern 7a during the movement, completing the ink supply again;

[0064] S6. Determine the deviation between the position of the die 3 and the position of the rubber head 13a in a one-to-one correspondence, such as Figure 6 As shown, the alignment rubber head 13a with a deviation size smaller than the critical deviation size is selected, and the alignment rubber head 13a is driven to transfer the ink to the corresponding concave mold 3 to complete one pad printing, that is, the X driver is started to drive the row of rubber head mechanisms to move horizontally to the top of the pad printing turnover bottom plate 2, and then the Z telescopic device is started to drive the alignment rubber head 13a downward to contact the corresponding concave mold 3; Figure 7 As shown, the misplaced rubber head 13a whose remaining deviation size is greater than the critical deviation size is adjusted and corrected, that is, the Y telescope is started to adjust the position of the misplaced rubber head 13a in the Y direction, and the X telescope is started to adjust the position of the misplaced rubber head 13a in the X direction until the deviation size is less than the critical deviation size, and the remaining rubber head 13a is driven to transfer the ink to the corresponding concave mold 3 to complete the secondary transfer printing.

[0065] like Figure 8 As shown, preferably, in step S1, there are 5 pad printing patterns 7a on the pad printing steel plate 7, and the center point coordinates of the 5 pad printing patterns 7a are (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), and (X5, Y5);

[0066] like Fig. 9 As shown, in step S2, the coupled glue head mechanism has a total of 5 glue heads 13a, and the initial coordinates of the 5 glue heads 13a are (X'1, Y'1), (X'2, Y'2), (X'3, Y'3), (X'4, Y'4), and (X'5, Y'5); according to the reference point and the displacement K distance, the coordinates of the 5 glue heads 13a are adjusted to (X1+k, Y1), (X2+k, Y2), (X3+k, Y3), (X4+k, Y4), and (X5+k, Y5).

[0067] like Fig.10 As shown, preferably, in step S4, the coordinates of the five concave dies 3 are (X"1, Y"1), (X"2, Y"2), (X"3, Y"3), (X"4, Y"4), and (X"5, Y"5);

[0068] According to the position of each die (3) detected by the upper visual camera (5), a is set as the supplement amount of the die in the X direction, and the adjustment compensation coordinates of the die in the X direction are realized by moving the positioning base as follows:

[0069] (X”1+a,Y”1)\(X”2+a,Y”2)\(X”3+a,Y”3)\(X”4+a,Y”4)\(X”5+a,Y”5);

[0070] Preferably, in step S6, the coordinates of the reference points to which the five glue heads 13a are moved are (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), and (X5, Y5); the critical deviation size is set to △f; therefore, the judgment formula is as follows:

[0071] X1-(X”1+a)≤△f, Y”1-Y1≤△f;

[0072] X2-(X”2+a)≤△f, Y”2-Y2≤△f;

[0073] X3-(X”3+a)≤△f, Y”3-Y3≤△f;

[0074] X4-(X”4+a)≤△f, Y”4-Y4≤△f;

[0075] X5-(X”5+a)≤△f, Y”5-Y5≤△f;

[0076] Among the above five groups, when the coordinate deviations of the concave mold 3 and the rubber head 13a are consistent in both the X and Y directions, it belongs to the pad printing combination of alignment, and there is no need to adjust the position;

[0077] In the above five groups, when the coordinate deviation between the die 3 and the rubber head 13a is inconsistent in at least one of the X and Y directions, it is a misaligned pad printing combination and needs to be corrected.

[0078] In this operation method, a pad printing pattern 7a is provided on the pad printing steel plate 7. The center point of each pad printing pattern 7a is used as the reference point, and the reference point is only used to collect reference data once when the machine is installed, that is, each rubber head 13a corresponds to a reference point. By adjusting the position of the rubber head 13a, the initial coordinates of the rubber head 13a are formed, and then the pad printing steel plate 7 and the rubber head 13a are no longer adjusted. The pattern of the rubber head 13a is detected to determine the center of the pattern, and the center coordinates of the die 3 are detected. When the coordinate deviations of all the dies 3 and the corresponding rubber heads 13a are within the allowable range, multiple rubber heads 13a are pad printed synchronously; if there is at least one set of deviations outside the allowable range, other rubber heads 13a with qualified alignment are pad printed first, and the chucks with deviations outside the range are adjusted in the X and Y directions, and then pad printed for the second time. The compensation does not involve the position compensation of the pad printing steel plate 7, and it is based on the pad printing steel plate 7.

[0079] The difference between this method and the traditional process is that the multiple pads 13a are adjusted independently of each other, and are directly transmitted through the pad printing turnover base plate 2. The pad printing device is independent of the transmission structure, so it can be combined to form multi-color pad printing. In addition, the position of the concave mold 3 on the pad printing turnover base plate 2 is collected, which can be shared with multiple subsequent pad printing stations as a basis for accuracy compensation of subsequent stations.

[0080] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but will not deviate from the spirit of the present invention or exceed the defined scope. Although the present invention is described and described in detail in the drawings and the foregoing description, such descriptions and descriptions are considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, changes and modifications may be made by a person of ordinary skill. Specifically, the present invention encompasses additional embodiments having any combination of features from the above-mentioned different embodiments. With respect to the use of the expression "generally" or "substantially", this patent application should be understood to disclose that these features and values ​​are also fully satisfied, i.e., there is no aforementioned characterization as "generally" or "substantially".

[0081] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A high-precision pad printing method, characterized in that: The following steps are involved: S1. When the machine is on, the center points of each pad printing pattern (7a) on the pad printing steel plate (7) are collected as reference points for each pad head (13a) to correspond to one another; S2, obtaining the initial coordinates of each rubber head (13a), starting the X-drive to translate the row of rubber heads mechanism to displace each rubber head (13a) by a distance K along the X direction according to the corresponding reference point, so that each rubber head (13a) leaves the space directly above the pad printing steel plate (7) to make room for the ink cartridge (9); S3, starting the servo mechanism (8) to drive the ink cartridge (9) to move horizontally from the head end to the tail end of the pad printing steel plate (7), and applying ink on each pad printing pattern (7a) during the movement, thereby completing ink supply; S4, start the Y drive 1 (4) to drive the upper visual camera (5) to move horizontally to the top of the pad printing turnover bottom plate (2) to detect the position of each concave mold (3); S5, start the X driver to translate the row of rubber head mechanisms so that each rubber head (13a) corresponds to the top of each pad printing pattern (7a), start the Z telescopic device to drive the rubber head (13a) downward to contact the pad printing pattern (7a) to transfer the ink pattern, start the Z telescopic device to lift the rubber head (13a) away from the pad printing steel plate (7), start the X driver to drive the row of rubber head mechanisms to translate to the top of the lower visual camera (15), and detect the position of each rubber head (13a); S6, judging the deviation size of the position of the concave mold (3) and the position of the rubber head (13a) in a one-to-one correspondence, selecting the alignment rubber head (13a) whose deviation size is smaller than the critical deviation size, and driving the alignment rubber head (13a) to transfer the ink to the corresponding concave mold (3) to complete one transfer printing; The misaligned rubber heads (13a) whose remaining deviation size is greater than the critical deviation size are adjusted and corrected, and the remaining rubber heads (13a) are driven to transfer the ink to the corresponding concave mold (3) to complete the secondary transfer printing.

2. The high-precision pad printing method according to claim 1, characterized in that: In step S1, there are five pad printing patterns (7a) on the pad printing steel plate (7), and the center point coordinates of the five pad printing patterns (7a) are (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), and (X5, Y5); In step S2, the linked glue head mechanism has a total of 5 glue heads (13a), and the initial coordinates of the 5 glue heads (13a) are (X'1, Y'1), (X'2, Y'2), (X'3, Y'3), (X'4, Y'4), and (X'5, Y'5); according to the reference point and the displacement distance K, the coordinates of the 5 glue heads (13a) are adjusted to (X1+k, Y1), (X2+k, Y2), (X3+k, Y3), (X4+k, Y4), and (X5+k, Y5).

3. The high-precision pad printing method according to claim 2, characterized in that: In step S4, the coordinates of the five concave dies (3) are (X"1, Y"1), (X"2, Y"2), (X"3, Y"3), (X"4, Y"4), and (X"5, Y"5); According to the position of each die (3) detected by the upper visual camera (5), a is set as the supplement amount of the die in the X direction, and the adjustment compensation coordinates of the die in the X direction are realized by moving the positioning base as follows: (X”1+a,Y”1)\(X”2+a,Y”2)\(X”3+a,Y”3)\(X”4+a,Y”4)\(X”5+a,Y”5).

4. The high-precision pad printing method according to claim 3, characterized in that: In step S6, the coordinates of the five rubber heads (13a) moving to the reference points are (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), and (X5, Y5); the critical deviation size is set to △f; therefore, the judgment formula is as follows: X1-(X”1+a)≤△f, Y”1-Y1≤△f; X2-(X”2+a)≤△f, Y”2-Y2≤△f; X3-(X”3+a)≤△f, Y”3-Y3≤△f; X4-(X”4+a)≤△f, Y”4-Y4≤△f; X5-(X”5+a)≤△f, Y”5-Y5≤△f; In the above five groups, when the coordinate deviations of the concave mold (3) and the rubber head (13a) are consistent in both the X and Y directions, it belongs to the pad printing combination of alignment, and there is no need to adjust the position; In the above five groups, when the coordinate deviation between the concave mold (3) and the rubber head (13a) is inconsistent in at least one of the X and Y directions, it is a misaligned pad printing combination and needs to be corrected.

5. A high-precision row pad printing device, comprising a conveyor line (1), on which a pad printing turnover base (2) is directional transported, a plurality of concave molds (3) are arranged on a positioning base on the pad printing turnover base (2), and a concave mold visual inspection device, a pad printing device and a rubber head visual inspection device are arranged along the conveying direction of the conveyor line (1), characterized in that: The die visual inspection device comprises a Y driver (4), the Y driver (4) drives an upper visual camera (5) in translation, and the upper visual camera (5) is mounted above the conveyor line (1); the pad printing device comprises a base (6), a pad printing steel plate (7) is fixed on the base (6), an ink cartridge (9) is reciprocatedly driven above the pad printing steel plate (7), and a row of rubber head mechanisms are driven in translation on the base (6) through an X driver; the rubber head visual inspection device comprises a Y driver (14) located between the pad printing steel plate (7) and the conveyor line (1), the Y driver (14) drives a lower visual camera (15) in translation, and the row of rubber head mechanisms are mounted above the pad printing steel plate (7) and the lower visual camera (15).

6. The high-precision pad printing device according to claim 5, characterized in that: The base (6) has a table top, on which the pad printing steel plate (7) is horizontally fixed, and a plurality of pad printing patterns (7a) are arranged along the Y direction on the top surface of the pad printing steel plate (7).

7. The high-precision pad printing device according to claim 6, characterized in that: A servo mechanism (8) is installed on the table along the Y direction, and the servo mechanism (8) includes a servo motor, the rotating shaft of the servo motor drives a connecting screw, a nut is threaded on the screw, and the nut is fixedly connected to a slider, a guide rod is arranged parallel to the side of the screw, and the slider is sleeved on the guide rod to form a guide sliding connection, and the slider is fixedly connected to the ink cartridge (9) through a connecting plate, and the bottom of the ink cartridge (9) is an ink coating surface, and the ink coating surface contacts the top surface of the pad printing steel plate (7).

8. The high-precision pad printing device according to claim 6, characterized in that: The X-driver comprises a slide electric cylinder (10) and a guide rail (11) arranged along the X direction; a mounting frame (12) is fixedly connected to a sliding seat of the slide electric cylinder (10); a sliding block is fixedly arranged at the bottom of the mounting frame (12); and the sliding block is clamped on the guide rail (11) to form a sliding guide connection.

9. The high-precision pad printing device according to claim 8, characterized in that: The row of rubber head mechanisms comprises a plurality of pad printing components (13) arranged in an array on the mounting frame (12), the pad printing components (13) comprising a Z telescope fixedly mounted on the mounting frame (12), the Z telescope end facing downwards being fixedly connected to a Y telescope, the Y telescope end of the Y telescope being fixedly connected to an X telescope, and the X telescope end of the X telescope being fixedly connected to a rubber head (13a) via a mounting block.

10. The high-precision pad printing device according to claim 9, characterized in that: The conveyor line (1) comprises a base frame arranged along the Y direction, a transmission motor is fixed on the base frame, a plurality of pulleys are hinged on the base frame along the length direction, a transmission belt is tensioned and sleeved on a plurality of the pulleys, and the rotating shaft of the transmission motor is driven and connected to any of the pulleys.

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