Sheltered 3D pad printing jig and method

Abstract

The application discloses a kind of shielding 3D pad printing jig and method, jig includes: fixed plate (1), two micrometer slides (10) are fixedly installed in fixed plate (1), corresponding connector (20) is provided on the movable part of two micrometer slides (10), cover plate (2) is movably connected with two connectors 20 by two pins (22), cover plate (2) is provided with pad printing mouth (21) matched with product, cover plate (2) is corresponded with product body by adjusting two micrometer slides (10) and lets the pad printing mouth (21), cover plate (2) is realized overturning by corresponding on two connectors (20) by two pins (22) and let the cover plate (2) cover in the top of fixed plate (1);The shielding 3D pad printing jig and method of the application have the characteristics that the amount of ink used in the pad printing process is saved, the position of the pattern printed is more accurate, and the cost of manpower and material resources is saved.

Description

Technical Field

[0001] This invention relates to the field of 3D pad printing technology, and in particular to a masking 3D pad printing fixture and method. Background Technology

[0002] Existing 3D pad printing machines involve manually placing the product jig into the machine during the pad printing process. The jig is fixed to the machine base using a T-slot and M5 screws, and the product is held in place by a vacuum suction groove. Structurally, this method cannot effectively shield the product's body, resulting in 100% ink overflow at the body area. Functionally, existing jigs are relatively simple, only serving to support the product and allow it to be transferred under high pressure. They cannot control the transfer area, leading to poor transfer when the product is transferred to an ineffective area. Furthermore, existing pad printing processes cannot overcome the problem of ink overflow at the body of the product. The cause of ink overflow is that to achieve no light leakage and no ink overflow during pad printing, the deformation of the ink nozzle during ink intake / transfer is too large. This requires expanding the design of the pad printing pattern to solve the light leakage problem in existing technologies, but this method amplifies the ink overflow problem, resulting in a waste of manpower and resources. Summary of the Invention

[0003] This invention aims to solve the problem that existing jigs easily cause inaccurate product precision, and that existing pad printing jigs cannot solve the problem of excessive waste of manpower and resources caused by ink overflow. Therefore, a masking 3D pad printing jig and method are proposed.

[0004] According to the present invention, a masking 3D pad printing fixture includes: a fixed plate, a cover plate, and a product-shaped base. Two micrometer slides are mounted on the fixed plate, and connecting parts are correspondingly provided on the movable parts of the two micrometer slides. The cover plate is movably connected to the two connecting parts by two pins. The cover plate is provided with a pad printing port that matches the product. The cover plate is adjusted so that the pad printing port aligns with the product body by adjusting the two micrometer slides. The cover plate is flipped over by the two pins corresponding to the two connecting parts so that the cover plate covers the product-shaped base.

[0005] In the above-mentioned masking 3D pad printing fixture of the present invention, the part where the cover plate and the product contour base are in contact is in a seamless fit.

[0006] In the above-mentioned masking 3D pad printing fixture of the present invention, two second mounting portions are provided on the end face of the cover plate opposite to the connector, and two first mounting portions matching the second mounting portions are provided on the end face of the connector opposite to the cover plate. The pin passes through the first mounting portions and the second mounting portions to connect the connector to the cover plate.

[0007] In the above-mentioned shielding 3D pad printing fixture of the present invention, the fixing plate, cover plate, two micrometer slide product contour bases and connecting parts are all made of aluminum alloy.

[0008] In the above-mentioned masking 3D pad printing fixture of the present invention, both micrometer slides include a fixed part, a scale and a sliding part. The fixed part is mounted on a fixed plate, the scale is disposed on the fixed part and the sliding part is disposed on the scale.

[0009] In the above-mentioned masking 3D pad printing fixture of the present invention, the two micrometer slides and the product contour base are all fixed to the fixing plate by hexagonal screws.

[0010] In the above-mentioned masking 3D pad printing fixture of the present invention, Teflon engineering plastic is attached to the product contour base.

[0011] On the other hand, embodiments of the present invention provide a method for 3D pad printing using a masking technique, employing the aforementioned masking 3D pad printing fixture, and including the following steps:

[0012] S1. Prepare a product-shaped base and a corresponding cover plate according to the product specifications;

[0013] S2. Fix the product contour base and two micrometer slides onto the fixed plate.

[0014] S3. Install the two connectors on the top of the micrometer slide, respectively;

[0015] S4. Install and connect the cover plate to the two connectors using pins. Adjust the micrometer slide to align the cover plate's printing port with the product's contour base, so that the cover plate around the printing port can block the invalid printing area.

[0016] S5. Flip the cover open and place the product on the product-shaped base;

[0017] S6. Flip and close the cover plate, and transfer the product through the transfer printing port on the cover plate;

[0018] S7. Flip open the cover, take out the product that has been pad-printed, put in the next product that needs to be pad-printed, and repeat step S5 until all products have been pad-printed.

[0019] The method described above in this invention further includes: fixing the fixing plate to the pad printing machine platform to ensure the secure installation of the product contour base and prevent it from moving.

[0020] In the method described above in this invention, both micrometer slides include a fixed part, a scale, and a sliding part. The fixed part is mounted on a fixed plate, the scale is disposed on the fixed part, and the sliding part is disposed on the scale so that the transfer printing port on the cover plate is aligned with the product contour base, so that the cover plate completely covers the invalid transfer printing area.

[0021] In the method described above in this invention, two first mounting portions are provided on the side wall opposite to the cover plate of the connector, and two second mounting portions that match the first mounting portions are provided on the side wall opposite to the connector of the cover plate, so that the cover plate can be flipped relative to the fixing plate by a pin, and the cover plate can be opened or closed.

[0022] The masking 3D pad printing fixture and method of this invention, by setting a connector with pins on the fixed plate, allows the cover plate to be reversed and the product-shaped base to be added, thus splitting the original fixture in two. This effectively saves base material and makes replacement more convenient and quick. A micrometer slide is set on the fixed plate, and the connector 20 is fixed on the micrometer slide, which allows for effective control of the cover plate position, greatly improving the product body masking accuracy, solving the problem of excessive ink consumption during pad printing, and saving ink consumption. The cover plate not only provides a masking effect but also fixes the position of the product to be pad printed, improving pad printing accuracy and work efficiency. One fixture has multiple functions, making the fixture more functional and inventive, overcoming the problem of ink overflow on the product body, and saving a lot of manpower and material costs in the later stage. Attached Figure Description

[0023] Figure 1 This is an exploded view structural diagram of a shielded 3D pad printing fixture according to one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the shielded 3D pad printing fixture from another perspective in the illustrated embodiment;

[0025] Figure 3 The figure shows a top view of the structure of the masking 3D pad printing fixture in the embodiment shown in the figure;

[0026] The labels and component names represented in each drawing are uniformly explained as follows: 1-Fixed plate, 10-Micrometer slide, 100-Fixed part, 101-Scale, 102-Sliding part, 2-Cover plate, 20-Connector, 200-First mounting part, 21-Pattern printing port, 22-Pin, 23-Second mounting part, 3-Product contour base. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Example 1

[0029] Figures 1 to 3 This invention illustrates a masking 3D pad printing fixture, comprising a fixed plate 1, two micrometer slides 10, a cover plate 2, two connectors 20, and a product-contouring base 3. In this invention, the fixed plate 1 can be installed inside a 3D pad printing machine to support the pad-printed product and other components. The bottom and top of the two micrometer slides 10 are respectively a fixed part 100 and a sliding part 102, with at least X and Y axis scales 101 between them. The fixed part 100 is used to be tightly attached to and fixedly installed on the fixed plate 1. By moving the middle scale 101, the sliding part 102 is driven to slide, thereby changing the position of the sliding part 102 relative to the fixed part 100 and the fixed plate 1 in the X and / or Y axis.

[0030] like Figures 1-3 Both micrometer slides 10 include a fixed part 100, a scale 101, and a sliding part 102. The fixed part 100 is mounted on the fixed plate 1, the scale 101 is set on the fixed part 100, and the sliding part 102 is set on the scale 101. The sliding part 102 is adjusted by sliding the scale 101 on the fixed part 100, thereby causing the connecting piece 20 fixedly connected to the sliding part 102 to move the cover plate 2, so that the printing port 21 on the cover plate 2 corresponds to the product body. It should be noted that each micrometer slide 10 has two scales 101. The two scales 101 on the same micrometer slide 10 are located on the X-axis and Y-axis respectively. By simultaneously moving the two scales 101 on the X-axis, the two connecting parts 20 can move simultaneously in the positive and negative directions of the X-axis. By simultaneously moving the two scales 101 on the Y-axis, the two connecting parts 20 can move simultaneously in the positive and negative directions of the Y-axis, thereby calibrating the position of the cover plate 2.

[0031] When using this pad printing fixture, by adjusting the two micrometer slides 10, the cover plate 2 can move forward and backward (X-axis) and / or left and right (Y-axis) on the product contour base 3. When adjusting the two micrometer slides 10, the direction and degree of adjustment must be consistent. This allows the connecting piece 20 to move the cover plate 2 on the fixed plate 1 in the X-axis and / or Y-axis directions. By continuously adjusting the scales on the two micrometer slides 10, the pad printing opening 21 on the cover plate 2 is aligned with the top of the product contour base 3, ensuring that the 3D pad printing machine operates smoothly during the pad printing process. The printing head enters the cover plate 2 through the printing port 21 and prints the parts of the product to be printed, improving the accuracy of the product after molding. The reversible cover plate 2 with a fixed conformal glass base divides the original fixture into two, effectively saving base material and making replacement more convenient and quick, thus improving work efficiency. The cover plate 2 is equipped with a micrometer slide 10, which allows the position of the cover plate 2 to be effectively controlled, greatly improving the product body covering accuracy. While playing a blocking role, the cover plate 2 also plays a role in fixing the product to be printed, improving the printing accuracy and printing quality.

[0032] like Figures 1-3 Two connectors 20 are provided with a first mounting part 200 with mounting holes on the side wall facing the cover plate 2. The cover plate 2 is provided with a second mounting part 23 with mounting holes corresponding to the connectors 20 on the side wall facing the connectors 2. When the first mounting part 200 and the second mounting part 23 abut against each other, the pin 22 passes through the mounting hole, allowing the connectors 20 to be movably connected to the cover plate 2. The bottom of the connectors 20 is fixedly connected to the top of the micrometer slide 10. At this time, the connectors 20 cannot move on the micrometer slide 10, but the cover plate 2 can be flipped on the connectors 20 by the pin 22. The included angle between the cover plate 2 and the fixed plate 1 is between 90° and 180°, which makes it convenient to have enough space to place the product to be transferred on the product contour base 3 or remove it from the product contour base 3. At the same time, the connectors 20 are fixedly connected to the top of the micrometer slide 10 (that is, the sliding part 102).

[0033] It should be noted that the first mounting part 200 and the second mounting part 23 are perfectly matched when they abut, and the diameter of the mounting hole is perfectly matched with the diameter of the pin 22. In this way, the cover plate 2 cannot wobble left or right or back and forth, and its position remains unchanged unless the micrometer slide 10 is moved. When pad printing is required, the cover plate 2 is flipped onto the top of the fixing plate 1, so that the size of the finished product corresponds to the size on the design drawing, solving the ink overflow problem. After the pad printing is completed, the cover plate 2 is flipped over to the top of the connector 20, making it easy to remove the finished product from the product contour base 3. At the same time, the original fixture relies on manual placement of glass and vacuum adsorption for fixing, which makes the product prone to displacement, resulting in poor pad printing accuracy. Due to the structure of the cover plate 2, the cover plate 2 will assist in placing the material and pressing the product to be pad printed, playing a positioning function and improving the placement accuracy of the product to be pad printed, thereby improving the pad printing accuracy. Furthermore, the connection between the cover plate 2 and the product contour base 3 is a highly flat and seamless fit, with no gaps at the joint between the two modules. When they are fitted together, they can be regarded as a whole, which improves the covering accuracy of the cover plate 2 and has the function of resisting high pressure and not easily deforming. The cover plate 2 will cover the product body, thereby achieving the function of covering the glass body. This improves the problem that existing fixtures cannot overcome, such as 100% ink overflow / ink overflow to non-paddle printing surfaces of 3D pad printing products, saving a lot of manpower and material resources.

[0034] In this embodiment, please refer to Figure 1 The fixing plate 1 has multiple through holes, which can be used to install the fixing plate 1 inside the 3D pad printing machine. At the same time, it can also be used to install the micrometer slide 10 and the product contour base 3 together with the fixing plate 1 by bolts through the through holes on the micrometer slide 10 and the product contour base 3. The fixing plate 1 serves as a mounting base.

[0035] In this embodiment, the product contouring base 3 is divided into two parts: a base plate for fixed connection with the fixing plate 1 and a product contouring component. The product contouring base 3 is made according to the product shape to create a corresponding product outline, which plays a role in initial positioning. This can improve the accuracy of product pad printing and reduce the compensation value of manual material placement error, thereby improving the operation accuracy and operability. Teflon engineering plastic is attached to the jig contouring base. Teflon has corrosion resistance and high chemical stability. It will not react chemically when in contact with solutions such as ink and thinner. It has a low coefficient of friction. Attaching Teflon to the jig surface can effectively ensure that the product glass will not be scratched by the jig. In addition to using Teflon as the engineering plastic material, Teflon can also be replaced with soluble polytetrafluoroethylene (PFA) or fluorinated ethylene propylene copolymer, which also have high melting points and strong corrosion resistance. Users can negotiate with the manufacturer when purchasing according to their actual use.

[0036] The fixture's fixing plate 1, cover plate 2, two micrometer slides 10, product contour base 3, and connector 20 are all made of aluminum alloy. This material has the advantages of high compressive strength, durability, light weight, corrosion resistance, and abrasion resistance. It can withstand countless high-intensity pressures from the pad printing machine without deformation, and the fixture structure is not damaged by friction during operation, ensuring stable pad printing operations.

[0037] Please refer to Figure 3 When the cover plate 2 is flipped to the top of the fixing plate 1, the cover plate 2 can completely cover the product contour base 3. The printing port 21 on the cover plate 2 is opposite to the top of the product contour base 3. The glue head is poured into the product contour base 3 from the printing port 21, and the printing material on the glue head solidifies and shapes on the product contour base 3.

[0038] To implement the shielded 3D pad printing fixture of this embodiment, firstly, two micrometer slides 10 and the product contour base 3 are fixed to the fixing plate 1 with bolts. Then, two connectors 20 are installed on the top of the two micrometer slides 10 with bolts, so that the parts that can install pins 22 face the product contour base 3. Then, the two pins 22 are inserted into the two connectors 20. After that, the fixture that has been initially installed can be installed in the 3D pad printing machine. By adjusting the installation position of the fixing plate 1, the product contour base 3 is positioned directly below the nozzle of the 3D pad printing machine. Finally, the cover plate 2 is pivotally connected to the connectors 20 with pins 22. At this point, the installation steps of the fixture are completed. When pad printing is required, firstly, the cover plate 2 is rotated 150° from above the connectors 20 to cover the product contour base 3. Then, the two micrometer slides 10 are adjusted... The micrometer scale aligns the printing port 21 on the cover plate 2 with the product's contour base 3, allowing the 3D pad printing machine's ink head to enter the cover plate 2 through the printing port 21. The ink head then prints the pattern onto the product. After the pattern solidifies, the cover plate 2 is flipped back from the fixing plate 1 to the top of the connector 20, allowing the product to be quickly removed, completing the product pad printing process. Using this pad printing fixture, during the molding process, the cover plate 2 not only completely covers the product to be pad printed, ensuring that the amount of ink used by the pad printing machine's ink head during ink intake and printing matches the amount of ink required for the initially designed pattern, solving the problem of excessive ink usage during pad printing and saving ink, but also stabilizes the position of the product to be pad printed, improving printing accuracy. This fixture combines multiple functions, making it more functional and innovative, overcoming the problem of ink overflow from the product, and saving significant manpower and material costs in the later stages.

[0039] Example 2

[0040] An embodiment of the present invention provides a masking 3D pad printing method, which uses the masking 3D pad printing fixture described in Embodiment 1. The method includes:

[0041] S1 Prepare two micrometer slides 10, a product contour base 3, and a cover plate 2 that is compatible with it;

[0042] S2 fixes the product contour base 3 and the two micrometer slides 10 onto the fixing plate 1;

[0043] S3 installs the two connectors 20 on the top of the micrometer slide table 10 respectively;

[0044] S4 installs and connects the cover plate 2 to the two connectors 20 via pins 22. By adjusting the micrometer slide 10, the transfer printing port 21 of the cover plate 2 is aligned with the product contour base 3, so that the cover plate 2 around the transfer printing port 21 can block the invalid transfer printing area.

[0045] S5 opens cover 2 and inserts the product;

[0046] S6 closes the cover plate 2 and performs pad printing on the product through the pad printing port 21 of the cover plate 2;

[0047] S7 Open cover 2, take out the product that has been pad-printed, put in the next product that needs to be pad-printed, and repeat step S5 until all products have been pad-printed.

[0048] in,

[0049] In step S1, the pad printing port on the cover plate 2 is prepared to have the same projection as the contour of the product contour base 3 to ensure that normal pad printing can be carried out and pad printing outside the range is blocked.

[0050] In step S2, the fixing plate 1 also needs to be fixedly installed on the pad printing machine platform to ensure that the product contour base 3 and the micrometer slide 10 are firmly installed and not easily moved.

[0051] In this embodiment, the fixing plate 1, micrometer slide 10, and product contour base 3 are assembled only when the fixture is needed. Since the micrometer slide 10 is a high-precision instrument, storing it separately can prevent damage to its precision. The product contour base 3, as in step S1, needs to be customized according to the size and shape of the product to be transferred. Therefore, in step S3, a portion of each of the two micrometer slides 10 is fixedly installed onto both sides of the fixing plate 1 and the product contour base 3.

[0052] In step S4, two first mounting portions 200 are provided on the side wall opposite to the cover plate 2 of the connector 20, and two second mounting portions 23 that match the first mounting portions 200 are provided on the side wall opposite to the connector 20 of the cover plate 2. When the first mounting portions 200 and the second mounting portions 23 abut against each other, the connector 22 can be connected to the cover plate 2 by the pin 22 passing through the first mounting portions 200 and the second mounting portions 23. When the first mounting portions 200 and the second mounting portions 23 abut against each other, there is no gap between them, which avoids the cover plate 2 from wobbling from side to side, which would lead to a decrease in the accuracy of the pad printing.

[0053] In step S4, both micrometer slides 10 can move in the X and Y axis directions. By moving the scale 101 on the micrometer slide 10, the sliding part 102 drives the connector 20, and the connector 20 drives the cover plate 2, so that the transfer printing port 21 on the cover plate 2 is aligned with the product contour base 3, so that the cover plate 2 completely covers the invalid transfer printing area.

[0054] In step S5, open the cover plate 2, or flip the cover plate 2 to a position between 90° and 180° with the fixing plate 1, and place the product on the product contour base 3 to ensure consistent projection;

[0055] In step S6, since the product to be printed has been placed into the product contour base 3, the part of the cover plate 2 outside the printing port 21 blocks the part outside the product outline, so that the printing can proceed smoothly without ink overflow.

[0056] In step S7, to ensure that the fixture completely solves the ink overflow problem for each product, and to facilitate the quick and easy removal of the product and placement of the next product to be printed after the pad printing of one product is completed, the cover plate 2 needs to change its position between flipping up and flipping down. Flipping up the cover plate 2 makes it easy to remove and place the product, while flipping down the cover plate 2 completely covers the invalid pad printing area.

[0057] In this embodiment, the connector 20 is used to connect the micrometer slide 10 and the cover plate 2, allowing the position of the cover plate 2 to be precisely adjusted via the micrometer slide 10. Therefore, part of the connector 20 is fixed to the micrometer slide 10, and the other part is connected to the cover plate 2. Specifically, a second mounting part 23 is provided on the end face of the cover plate 2 opposite to the connector 20, and a first mounting part 200 matching the second mounting part 23 is provided on the end face of the connector 20 opposite to the cover plate 2. After aligning the second mounting part 23 with the first mounting part 200, the cover plate 2 is connected to the connector 20 via a pin 22. The connector 20 and the mounting part are completely fitted together, ensuring that the cover plate 2 will not wobble after adjusting the micrometer slide 10, thus avoiding affecting the accuracy of the covering. At the same time, the pin 22 acts as a pivot, allowing the connector 20 to rotate relative to the cover plate 2.

[0058] In this embodiment of the invention, a connector 20 is fixedly connected to the micrometer slide 10, and a mounting part matching the connector 20 is provided on the cover plate 2. The connector 20 is connected to the cover plate 2 by a pin 22, allowing the cover plate 2 to rotate 150°. By moving the scale 101 on the micrometer slide 10, the cover plate 2 is completely aligned with the product contour base 3, so that the cover plate 2 can completely cover the ineffective transfer printing area, solving the problem of ink overflow on the product body and saving a lot of manpower and material costs in the later stage.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A shielded 3D pad printing jig, characterized by, The utility model relates to a kind of product imprinting device, including: Fixed plate (1), cover plate (2) and product profiling base (3), two micrometer slides (10) are installed on the fixed plate (1), and the movable part of two micrometer slides (10) is provided with connecting piece (20) correspondingly, the cover plate (2) is movably connected with two connecting pieces (20) by two pins (22), so that the cover plate is opened or covers product on the product profiling base (3), the cover plate (2) is provided with pad printing opening (21) matched with product, the cover plate (2) is passed through two micrometer slides (10) and let pad printing opening (21) correspond with product body, the micrometer slide (10) includes fixed part (100), scale (101) that can be axially displaced and sliding part (102), the fixed part (100) is installed on the fixed plate (1), the scale (101) is arranged on fixed part (100), the sliding part (102) is arranged on scale (101), by the scale (101) is driven the sliding part (102) is slid, so that the sliding part (102) relative to the fixed part (100) and the fixed plate (1) change in the position of X axis or / and Y axis direction, so that pad printing opening (21) on cover plate (2) is aligned with product profiling base (3), and cover plate (2) completely covers ineffective pad printing area;The part of cover plate (2) and product profiling base (3) contact is seamless state.

2. The occluded 3D pad printing jig of claim 1, wherein, The end face of the cover plate (2) opposite to the connecting piece (20) is provided with two second mounting portions (23), and the end face of the connecting piece (20) opposite to the cover plate (2) is provided with two first mounting portions (200) matched with the second mounting portions (23), and the pin (22) penetrates the first mounting portion (200) and the second mounting portion (23) to make the connecting piece (20) pivotally connected with the cover plate (2).

3. The occluded 3D pad printing jig of claim 1, wherein, The fixed plate (1), the cover plate (2), the two micrometer slides (10), the product profiling base (3) and the connecting piece (20) are all made of aluminum alloy material.

4. The occluded 3D pad printing jig of any of claims 1-3, wherein, The micrometer slide (10) and the product profiling base (3) are fixed on the fixed plate (1) by screws, and the surface of the product profiling base (3) is attached with Teflon engineering plastic.

5. A method of using the shielded 3D pad printing jig of claim 1, wherein, The steps include: S1, product profiling base (3) and cover plate (2) suitable therefor are prepared according to product; S2, the product profiling base (3) and the two micrometer slides (10) are fixedly installed on the fixed plate (1); S3, the two connecting pieces (20) are correspondingly mounted on the top of the micrometer slide (10); S4, the cover plate (2) is installed and connected with the two connecting pieces (20) by the pin (22), and the pad printing opening (21) of the cover plate (2) is opposite to the product profiling base (3) by adjusting the micrometer slide (10), so that the cover plate (2) around the pad printing opening (21) can block the ineffective pad printing area; S5, the cover plate (2) is opened, and the product is placed on the product profiling base (3). S6, turn over and close the cover plate (2) to print the product through the printing opening (21) of the cover plate (2); S7, turn over and open the cover plate (2), take out the product with completed printing, put in the next product to be printed, repeat to step S5 until all products are printed; Wherein, the micrometer sliding table (10) comprises a fixed part (100), a scale (101) and a sliding part (102), the fixed part (100) is fixedly installed on the fixed plate (1), the scale (101) is arranged on the fixed part (100), and the sliding part (102) is arranged on the scale (101) to align the printing opening (21) on the cover plate (2) with the product profiling base (3), so that the cover plate (2) completely shields the ineffective printing area.

6. The method of claim 5, wherein: Further comprising: The fixed plate (1) is fixedly installed on the platform of the printing machine.

7. The method of claim 5, wherein: Further comprising: The opposite side wall of the connecting piece (20) is provided with two first installation parts (200), and the opposite side wall of the cover plate (2) is provided with two second installation parts (23) matched with the first installation parts (200), so that the cover plate (2) can be turned over relative to the fixed plate (1) through the pin (22), and the cover plate (2) can be opened or closed.

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