High-precision double-sided printing device

Abstract

A high-precision double-face printing device comprises a first printing part for printing a first face of a printing substrate and a second printing part for printing a second face of the printing substrate, and a first material roller and a second material roller are arranged on the outer side of the first printing part and the outer side of the second printing part respectively. The first printing part comprises a first printer and a first printing platform matched with the first printer, and the second printing part comprises a second printer and a second printing platform matched with the second printer. The distance between the two printing platforms can be shortened through the obliquely-arranged first printing platform and the horizontally-arranged second printing platform, during printing, the second printing platform can be used as a printing front face part, good adaptability to ink and a printing substrate with the shading effect is achieved, and therefore the printing effect is guaranteed.

Description

Technical Field

[0001] The present application relates to a high-precision double-sided printing device. Background Art

[0002] Double-sided printing refers to flipping the printing on both sides of a printing substrate, so that the printing on both sides of the printing substrate forms a symmetrical setting, which can be used for structures such as light boxes and has a better display effect. Currently, printing mostly uses two horizontal support platforms, and then uses guide rollers to turn between the two horizontal support platforms to finally complete the printing operation between the two sides. However, in this way, the distance stretched by the printing substrate between the two platforms is too long, which affects the printing accuracy of the printed pattern on the printing substrate. In order to avoid the above problems as much as possible, there are some structures that use two inclined platforms, and then turn directly between the two inclined platforms. However, this oblique printing method will affect the printing after the inkjet printing, due to the extension problem of the printing substrate, the oblique printing accuracy problem and the blurring problem, etc., which ultimately affects the display effect. Utility Model Content

[0003] In order to solve the above problems, the present application proposes a high-precision double-sided printing device, including a first printing part for printing the first side of a printed substrate and a second printing part for printing the second side, a first material roller and a second material roller are respectively arranged on the outside of the first printing part and the outside of the second printing part, the first printing part includes a first printer and a first printing platform arranged in cooperation with the first printer, the second printing part includes a second printer and a second printing platform arranged in cooperation with the second printer, the first printing platform is an obliquely arranged platform, and the second printing platform is a horizontally arranged platform; a steering roller is arranged between the first printing platform and the second printing platform to cooperate with the first printing platform and the second printing platform; a first supporting roller is arranged on the other side of the first printing platform relative to the steering roller; and a second supporting roller is arranged on the other side of the second printing platform relative to the steering roller. The present application can shorten the distance between the two printing platforms by using the obliquely arranged first printing platform and the horizontally arranged second printing platform. When printing, the second printing platform can be used as the front part of the printing, and has good adaptability to inks with a smudge effect and printing substrates, thereby ensuring the printing effect.

[0004] Preferably, the steering roller is provided with a first import position for exporting from the first printing platform and a second import position for importing to the second printing platform, or the steering roller is provided with a first import position for importing to the first printing platform and a second import position for exporting from the second printing platform; the angle formed by the first import position and the second import position is α, 90°<α<180°. The present application adopts a steering roller to complete the steering between the two printing platforms. The steering roller directly cooperates with the first printing platform part to receive the printed substrate thereon, and the other side cooperates with the second printing platform part to receive the printed substrate thereon, thereby ensuring the stability of the printed substrate during operation. The large-angle contact of the steering roller can prevent the printed substrate from wrinkling and slipping when flowing between the two printing platforms, which affects the subsequent printing effect.

[0005] Preferably, 105°≤α≤135°.

[0006] Preferably, the contact position of the first support roller and the printing substrate adjacent to the first printing platform and the first introduction position are arranged on the same side relative to the plane where the first printing platform is located, and the angle formed by the section where the contact position is located and the first printing platform is the same as the angle formed by the section where the first introduction position is located and the first printing platform. The extension direction thereof is arranged away from the first printing platform.

[0007] Preferably, the contact position of the second support roller with the printing substrate adjacent to the second printing platform is arranged on the same side as the second introduction position relative to the plane where the second printing platform is located, and the angle formed by the section where the contact position is located and the second printing platform is the same as the angle formed by the section where the second introduction position is located and the second printing platform. The extension direction thereof is arranged away from the second printing platform.

[0008] Preferably, a first cloth guide roller is arranged between the side of the first support roller away from the first printing platform and the first material roller, the lower part of the first cloth guide roller is provided with a first cloth guide abutment portion arranged to contact the printing substrate, and the upper part of the first support roller is provided with a first support abutment portion arranged to contact the printing substrate.

[0009] Preferably, the center angle of the first cloth guide roller corresponding to the first cloth guide abutment portion is A, A≤90°, and the circular angle of the first support roller corresponding to the first support abutment portion is B, B≤90°; A≤B. The present application controls the position of the first support roller by the first cloth guide roller, that is, limits the position of the first support roller to enter the first printing platform. The use of the first cloth guide roller and the first support roller in this manner can avoid wrinkles and excessive stretching of the printed substrate, and can better complete the printing of one side, thereby facilitating double-sided alignment printing.

[0010] Preferably, a second cloth guide roller is arranged between the second support roller on the side away from the second printing platform and the second material roller, the second cloth guide roller is provided with a second cloth guide abutment portion arranged to contact the printing substrate, and the second support roller is provided with a second support abutment portion arranged to contact the printing substrate.

[0011] Preferably, the center angle of the second supporting roller corresponding to the second supporting abutment portion is D, 90°≤D≤180°, and the center angle of the second cloth guiding roller corresponding to the second cloth guiding abutment portion is C, C≤150°; C≤D;

[0012] The second cloth guide roller is a cloth clamping roller that can abut against or move away from the second support roller;

[0013] The steering roller and the second supporting roller are active rollers;

[0014] The first support roller and the first cloth guide roller are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the corresponding steel rollers. The second cloth guide roller of the present application is in the form of a cloth clamping roller, which is convenient for loading and targeted tension adjustment for different printing substrates, thereby providing a structural basis for improving printing accuracy.

[0015] This application can bring the following beneficial effects:

[0016] 1. The present application can shorten the distance between the two printing platforms by means of an obliquely arranged first printing platform and a horizontally arranged second printing platform. During printing, the second printing platform can be used as the front printing part, and has good adaptability to inks and printing substrates with a blurring effect, thereby ensuring the printing effect.

[0017] 2. The present application controls the position of the first cloth guide roller entering the first support roller, that is, limits the position of the first printing platform. The use of the first cloth guide roller and the first support roller can avoid wrinkles and excessive stretching of the printed substrate, and can better complete the printing of one side, thereby facilitating double-sided alignment printing.

[0018] 3. The second cloth guide roller of the present application is in the form of a cloth clamping roller, which is convenient for material loading and can perform targeted tension adjustment for different printing substrates, thereby providing a structural basis for improving printing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 A schematic diagram of this application.

[0021] Figure 2 This is a schematic diagram of some printed patterns in the examples of this application. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of the present solution, the present application is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0023] The present application discloses a high-precision double-sided printing device, and the printing method is actually a method for using the device.

[0024] like Figure 1 As shown, a high-precision double-sided printing device includes a first printing section 1 for printing the first side of a substrate 10 and a second printing section 2 for printing the second side. A first material roller 3 and a second material roller 4 are respectively arranged on the outside of the first printing section 1 and the outside of the second printing section 2. The first printing section 1 includes a first printer 5 and a first printing platform 6 arranged in cooperation with the first printer 5. The second printing section 2 includes a second printer 7 and a second printing platform 8 arranged in cooperation with the second printer 7. The first printing platform 6 is an obliquely arranged platform, and the second printing platform 8 is a horizontally arranged platform. A steering roller 9 is arranged between the first printing platform 6 and the second printing platform 8 to cooperate with the first printing platform 6 and the second printing platform 8.

[0025] For the steering roller 9, the steering roller 9 is provided with a first import position 11 for exporting from the first printing platform 6 and a second import position 12 for importing to the second printing platform 8, or the steering roller 9 is provided with a first import position 11 for importing to the first printing platform 6 and a second import position 12 for exporting from the second printing platform 8; the angle formed by the first import position 11 and the second import position 12 is α, 90°<α<180°.

[0026] A more preferred angle α is: 105°≤α≤135°.

[0027] For the auxiliary support roller part, a first support roller 13 is arranged on the other side of the first printing platform 6 relative to the steering roller 9; the contact position of the first support roller 13 and the printing substrate 10 adjacent to the first printing platform 6 and the first introduction position 11 are arranged on the same side relative to the plane where the first printing platform 6 is located, and the angle formed by the cross-section where the contact position is located and the first printing platform 6 is the same as the angle formed by the cross-section where the first introduction position 11 is located and the first printing platform 6.

[0028] A second supporting roller 14 is arranged on the other side of the second printing platform 8 relative to the steering roller 9; the contact position of the second supporting roller 14 and the printing substrate 10 adjacent to the second printing platform 8 is arranged on the same side as the second introducing position 12 relative to the plane where the second printing platform 8 is located, and the angle formed by the section where the contact position is located and the second printing platform 8 is the same as the angle formed by the section where the second introducing position 12 is located and the second printing platform 8.

[0029] A first cloth guide roller 15 is arranged between the side of the first support roller 13 away from the first printing platform 6 and the first material roller 3, the lower part of the first cloth guide roller 15 is provided with a first cloth guide abutment portion 16 arranged in contact with the printing substrate 10, and the upper part of the first support roller 13 is provided with a first support abutment portion 17 arranged in contact with the printing substrate 10.

[0030] For the material inlet and outlet, the first cloth guide abutment portion 16 corresponds to the first cloth guide roller 15 with a central angle of A, A≤90°, and the first support abutment portion 17 corresponds to the first support roller 13 with a circular angle of B, B≤90°; A≤B. The definition of angles A and B in the present application is actually the positional relationship between the first cloth guide roller 15 and the first support roller 13, both of which are in a state of small angle contact, which plays a general guiding role for the cloth.

[0031] A second cloth guide roller 18 is arranged between the second support roller 14 on the side away from the second printing platform 8 and the second material roller 4, the second cloth guide roller 18 is provided with a second cloth guide abutment portion 20 arranged to contact the printing substrate 10, and the second support roller 14 is provided with a second support abutment portion 19 arranged to contact the printing substrate 10.

[0032] The center angle of the second support roller 14 corresponding to the second support abutment portion 19 is D, 90°≤D≤180°, and the center angle of the second cloth guide roller 18 corresponding to the second cloth guide abutment portion 20 is C, C≤150°; C≤D;

[0033] The second cloth guide roller 18 is a cloth clamping roller that can be in contact with or away from the second support roller 14. The definition of angles C and D in the present application actually defines the up-down, left-right positional relationship of the second cloth guide roller 18 and the second support roller 14. Both are in a state of large-angle contact, which plays a role in adjusting the tension of the cloth.

[0034] The steering roller and the second supporting roller are active rollers;

[0035] The first support roller and the first cloth guide roller are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the corresponding steel rollers, which reduces the inertia moment and improves the printing accuracy.

[0036] In specific use, the direction of feeding and receiving materials is not limited: the following steps are included:

[0037] Select one of the first material roller 3 or the second material roller 4 as the feeding roller and the other as the receiving roller;

[0038] Then, the first material roller 3 or the second material roller 4 as the feeding roller is introduced into the adjacent first printing section 1 or the second printing section 2, and enters into another printing section through the turning roller 9, and finally the material is collected from the part as the receiving roller;

[0039] The angle between the plane where the printing substrate 10 on the first printing platform 6 is located and the plane where the printing substrate 10 on the second printing platform 8 is located is β, and 0<β<90°.

[0040] In order to prove the effectiveness of the present application, the position adjustment comparison of components such as the cloth guide roller and the support roller is used to illustrate the effectiveness of the present application.

[0041] Embodiment 1:

[0042] S101. With the first material roller 3 as the feeding roller and the second material roller 4 as the receiving roller, a 1m wide scraper cloth is set on the first material roller 3;

[0043] S102. Then the scraper cloth is introduced from the first material roller 3 as a feeding roller to the bottom of the first cloth guide roller 15, then turned over to the top of the first support roller 13, and then enters the first printing platform 6, and enters the second printing platform 8 after being turned over by the steering roller 9, and then enters the top of the second support roller 14, and then under the guidance and clamping of the second cloth guide roller 18, passes between the second support roller 14 and the second cloth guide roller and enters the second material roller 4 as a receiving roller;

[0044] The steering roller 9 and the second supporting roller 14 are set as active rollers;

[0045] The first support roller 13 and the first cloth guide roller 15 are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the corresponding steel rollers;

[0046] A is 40°, B is 60°;

[0047] C is 130°, D is 170°;

[0048] α is 135°, β is 45°;

[0049] S103. Set the print pattern (such as Figure 2As shown): the front and back sides are both set to be evenly distributed and overlapping circles, the outer diameter of the circle is 10mm, a right cross mark is set in the middle, the spacing between adjacent circles is 10mm, the line width is 0.2mm, the back side of the scraper cloth is printed by the first printer 5, the front side of the scraper cloth is printed by the second printer 7, and then the final product is obtained by winding it through the second material roller 4, and a 1m long scraper cloth is taken for light transmission observation, and the number of marked circles with right crosses with obvious deviations is recorded. If there is any doubt about whether there is a deviation, measurement is carried out. If the offset distance of the right cross exceeds 1mm, it is determined to be deviant.

[0050] S104. Verify whether the color blocks overlap or not. There is no deviation in the marked circle with a right cross. The maximum deviation is measured to be 0.3 mm.

[0051] Embodiment 2:

[0052] S201. With the second material roller 4 as the feed roller and the first material roller 3 as the receiving roller, a 1m wide scraper cloth is set on the second material roller 4;

[0053] S202. Then the scraper cloth is introduced from the second material roller 4 as a feeding roller to the bottom of the second cloth guide roller 18, then passes between the second cloth guide roller 18 and the second support roller 14, and then enters the second printing platform 8, and then enters the first printing platform 6 after being turned over by the steering roller 9, and then enters above the first support roller 13, and then enters the first material roller 3 as a receiving roller under the guidance of the lower part of the first cloth guide roller 15;

[0054] The steering roller 9 and the second supporting roller 14 are set as active rollers;

[0055] The first support roller 13 and the first cloth guide roller 15 are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the steel rollers of the corresponding shape;

[0056] A is 40°, B is 60°;

[0057] C is 130°, D is 170°;

[0058] α is 135°, β is 45°;

[0059] S203. Set the print pattern (such as Figure 2As shown): the front and back sides are both set to evenly distributed and overlapping circles, the outer diameter of the circle is 10mm, a right cross mark is set in the middle, the spacing between adjacent circles is 10mm, the line width is 0.2mm, the front side of the scraper cloth is printed by the second printer 7, the back side of the scraper cloth is printed by the first printer 5, and then the final product is obtained by winding it through the first material roller 4, and a 1m long scraper cloth is taken for light transmission observation, and the number of marked circles with right crosses with obvious deviations is recorded. If there is any doubt about whether there is a deviation, measurement is carried out. If the offset distance of the right cross exceeds 1mm, it is deemed to be deviant.

[0060] S204. Verify whether the color blocks overlap or not. There is no deviation in the marked circle with a right cross. The maximum deviation is measured to be 0.4 mm.

[0061] Embodiment 3:

[0062] S301. With the first material roller 3 as the feeding roller and the second material roller 4 as the receiving roller, a 1m wide scraper cloth is set on the first material roller 3;

[0063] S302. Then the scraper cloth is introduced from the first material roller 3 as a feeding roller to the bottom of the first cloth guide roller 15, then turned over to the top of the first support roller 13, and then enters the first printing platform 6, and enters the second printing platform 8 after being turned over by the steering roller 9, and then enters the top of the second support roller 14, and then under the guidance and clamping of the second cloth guide roller 18, passes between the second support roller 14 and the second cloth guide roller and enters the second material roller 4 as a receiving roller;

[0064] The steering roller 9 and the second supporting roller 14 are set as active rollers;

[0065] The first support roller 13 and the first cloth guide roller 15 are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the steel rollers of the corresponding shape;

[0066] A is 40°, B is 60°;

[0067] C is 130°, D is 170°;

[0068] α is 105°, β is 45°;

[0069] S303. Set the print pattern (such as Figure 2As shown): the front and back sides are both set to be evenly distributed and overlapping circles, the outer diameter of the circle is 10mm, a right cross mark is set in the middle, the spacing between adjacent circles is 10mm, the line width is 0.2mm, the back side of the scraper cloth is printed by the first printer 5, the front side of the scraper cloth is printed by the second printer 7, and then the final product is obtained by winding it through the second material roller 4, and a 1m long scraper cloth is taken for light transmission observation, and the number of marked circles with right crosses with obvious deviations is recorded. If there is any doubt about whether there is a deviation, measurement is carried out. If the offset distance of the right cross exceeds 1mm, it is determined to be deviant.

[0070] S304. Verify whether the color blocks overlap or not. There is no deviation in the marked circle with a right cross. The maximum deviation is measured to be 0.3 mm.

[0071] Embodiment 4:

[0072] S401. With the first material roller 3 as the feeding roller and the second material roller 4 as the receiving roller, a 1m wide scraper cloth is set on the first material roller 3;

[0073] S402. Then the scraper cloth is introduced from the first material roller 3 as a feeding roller to the bottom of the first cloth guide roller 15, then turned over to the top of the first support roller 13, and then enters the first printing platform 6, and enters the second printing platform 8 after being turned over by the steering roller 9, and then enters the top of the second support roller 14, and then under the guidance and clamping of the second cloth guide roller 18, passes between the second support roller 14 and the second cloth guide roller and enters the second material roller 4 as a receiving roller;

[0074] The steering roller 9 and the second supporting roller 14 are set as active rollers;

[0075] The first support roller 13 and the first cloth guide roller 15 are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the steel rollers of the corresponding shape;

[0076] A is 40°, B is 60°;

[0077] C is 130°, D is 170°;

[0078] α is 150°, β is 45°;

[0079] S403. Set the print pattern (such as Figure 2As shown): the front and back sides are both set to be evenly distributed and overlapping circles, the outer diameter of the circle is 10mm, a right cross mark is set in the middle, the spacing between adjacent circles is 10mm, the line width is 0.2mm, the back side of the scraper cloth is printed by the first printer 5, the front side of the scraper cloth is printed by the second printer 7, and then the final product is obtained by winding it through the second material roller 4, and a 1m long scraper cloth is taken for light transmission observation, and the number of marked circles with right crosses with obvious deviations is recorded. If there is any doubt about whether there is a deviation, measurement is carried out. If the offset distance of the right cross exceeds 1mm, it is determined to be deviant.

[0080] S404. Verify whether the color blocks overlap or not. There is no deviation in the marking circle in the shape of a right cross. The maximum deviation is measured to be 0.9 mm.

[0081] Embodiment 5:

[0082] S501. With the first material roller 3 as the feeding roller and the second material roller 4 as the receiving roller, a 1m wide scraper cloth is set on the first material roller 3;

[0083] S502. Then the scraper cloth is introduced from the first material roller 3 as a feeding roller to the bottom of the first cloth guide roller 15, then turned over to the top of the first support roller 13, and then enters the first printing platform 6, and enters the second printing platform 8 after being turned over by the steering roller 9, and then enters the top of the second support roller 14, and then under the guidance and clamping of the second cloth guide roller 18, passes between the second support roller 14 and the second cloth guide roller and enters the second material roller 4 as a receiving roller;

[0084] The steering roller 9 and the second supporting roller 14 are set as active rollers;

[0085] The first support roller 13 and the first cloth guide roller 15 are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the corresponding steel rollers;

[0086] A is 75°, B is 60°;

[0087] C is 130°, D is 170°;

[0088] α is 135°, β is 45°;

[0089] S503. Set the print pattern (such as Figure 2As shown): the front and back sides are both set to be evenly distributed and overlapping circles, the outer diameter of the circle is 10mm, a right cross mark is set in the middle, the spacing between adjacent circles is 10mm, the line width is 0.2mm, the back side of the scraper cloth is printed by the first printer 5, the front side of the scraper cloth is printed by the second printer 7, and then the final product is obtained by winding it through the second material roller 4, and a 1m long scraper cloth is taken for light transmission observation, and the number of marked circles with right crosses with obvious deviations is recorded. If there is any doubt about whether there is a deviation, measurement is carried out. If the offset distance of the right cross exceeds 1mm, it is determined to be deviant.

[0090] S504. Verify whether the color blocks overlap or not, and there are deviations in 10 marked circles with right crosses.

[0091] Embodiment 6:

[0092] S601. With the first material roller 3 as the feeding roller and the second material roller 4 as the receiving roller, a 1m wide scraper cloth is set on the first material roller 3;

[0093] S602. Then the scraper cloth is introduced from the first material roller 3 as a feeding roller to the bottom of the first cloth guide roller 15, then turned over to the top of the first support roller 13, and then enters the first printing platform 6, and enters the second printing platform 8 after being turned over by the steering roller 9, and then enters the top of the second support roller 14, and then under the guidance and clamping of the second cloth guide roller 18, passes between the second support roller 14 and the second cloth guide roller and enters the second material roller 4 as a receiving roller;

[0094] The steering roller 9 and the second supporting roller 14 are set as active rollers;

[0095] The first support roller 13 and the first cloth guide roller 15 are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of the steel rollers of the corresponding shape;

[0096] A is 40°, B is 60°;

[0097] C is 130°, D is 120°;

[0098] α is 135°, β is 45°;

[0099] S603. Set the print pattern (such as Figure 2As shown): the front and back sides are both set to be evenly distributed and overlapping circles, the outer diameter of the circle is 10mm, a right cross mark is set in the middle, the spacing between adjacent circles is 10mm, the line width is 0.2mm, the back side of the scraper cloth is printed by the first printer 5, the front side of the scraper cloth is printed by the second printer 7, and then the final product is obtained by winding it through the second material roller 4, and a 1m long scraper cloth is taken for light transmission observation, and the number of marked circles with right crosses with obvious deviations is recorded. If there is any doubt about whether there is a deviation, measurement is carried out. If the offset distance of the right cross exceeds 1mm, it is determined to be deviant.

[0100] S604. Verify whether the color blocks overlap or not. There are 50 marked circles with right crosses that have deviations.

[0101] Embodiment 7:

[0102] Based on Example 1, the first support roller 13 and the first cloth guide roller 15 are set as steel rollers, and the weight is 3 times that of the aluminum roller used in Example 1.

[0103] The final determination showed that there were 50 deviations in the marked circles with a right cross.

[0104] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A high-precision double-sided printing device, characterized in that: The invention comprises a first printing part for printing the first side of a printed substrate and a second printing part for printing the second side, a first material roller and a second material roller are respectively arranged on the outer side of the first printing part and the outer side of the second printing part, the first printing part comprises a first printer and a first printing platform arranged in cooperation with the first printer, the second printing part comprises a second printer and a second printing platform arranged in cooperation with the second printer, the first printing platform is an obliquely arranged platform, and the second printing platform is a horizontally arranged platform; a steering roller cooperating with the first printing platform and the second printing platform is arranged between the first printing platform and the second printing platform; a first supporting roller is arranged on the other side of the first printing platform relative to the steering roller; a second supporting roller is arranged on the other side of the second printing platform relative to the steering roller.

2. A high-precision double-sided printing device as claimed in claim 1, characterized in that: The steering roller is provided with a first import position for exporting from the first printing platform and a second import position for importing to the second printing platform, or the steering roller is provided with a first import position for importing to the first printing platform and a second import position for exporting from the second printing platform; the angle formed by the first import position and the second import position is α, 90°<α<180°.

3. A high-precision double-sided printing device as claimed in claim 2, characterized in that: 105°≤α≤135°。 4. A high-precision double-sided printing device as claimed in claim 2, characterized in that: The contact position of the first support roller and the printing substrate adjacent to the first printing platform and the first introduction position are arranged on the same side relative to the plane where the first printing platform is located, and the angle formed by the cross-section at the contact position and the first printing platform is the same as the angle formed by the cross-section at the first introduction position and the first printing platform.

5. A high-precision double-sided printing device as claimed in claim 4, characterized in that: The contact position between the second support roller and the printing substrate adjacent to the second printing platform is arranged on the same side as the second introduction position relative to the plane where the second printing platform is located, and the angle formed by the cross-section at the contact position and the second printing platform is the same as the angle formed by the cross-section at the second introduction position and the second printing platform.

6. A high-precision double-sided printing device as claimed in claim 5, characterized in that: A first cloth guide roller is arranged between the side of the first support roller away from the first printing platform and the first material roller, a first cloth guide abutment portion contacting the printing substrate is arranged at the lower part of the first cloth guide roller, and a first support abutment portion contacting the printing substrate is arranged at the upper part of the first support roller.

7. A high-precision double-sided printing device as claimed in claim 6, characterized in that: The center angle of the first cloth guide roller corresponding to the first cloth guide abutment portion is A, A≤90°, and the circular angle of the first support roller corresponding to the first support abutment portion is B, B≤90°; A≤B.

8. A high-precision double-sided printing device as claimed in claim 5, characterized in that: A second cloth guide roller is arranged between the second material roller and the side of the second support roller away from the second printing platform, the second cloth guide roller is provided with a second cloth guide abutment portion arranged to contact the printing substrate, and the second support roller is provided with a second support abutment portion arranged to contact the printing substrate.

9. A high-precision double-sided printing device as claimed in claim 8, characterized in that: The center angle of the second supporting roller corresponding to the second supporting abutment portion is D, 90°≤D≤180°, and the center angle of the second cloth guiding roller corresponding to the second cloth guiding abutment portion is C, C≤150°; C≤D; The second cloth guide roller is a cloth clamping roller that can abut against or move away from the second support roller; The steering roller and the second supporting roller are active rollers; The first supporting roller and the first cloth guide roller are aluminum rollers, and the weight of the aluminum rollers used is 1 / 3 of that of steel rollers of corresponding shapes.

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