Printing method of fully printed polyurethane silent balls and fully printed polyurethane silent balls

Abstract

This invention provides a printing method for a fully printed polyurethane silent ball and the fully printed polyurethane silent ball itself. The printing method includes preparing a patterned hemisphere; preparing an adhesive, which is a two-component PU adhesive comprising an A-component containing NCO isocyanate and a B-component containing hydroxyl groups; uniformly applying the adhesive to the inside of the patterned hemisphere; placing the polyurethane silent ball inside the patterned hemisphere, with the two patterned hemispheres joined together to cover the polyurethane silent ball; after the adhesive gels and becomes adhesive, separating the two patterned hemispheres from the polyurethane silent ball, transferring the ink layer onto the surface of the polyurethane silent ball through the adhesive, and forming a gel layer with the adhesive; tapping the surface of the polyurethane silent ball with a non-stick silicone plate to cause the gel layer to collapse into the recesses on the surface of the polyurethane silent ball, causing the gel layer to rupture at the corresponding recesses, thereby forming holes; and after the gel layer cures, a fully printed polyurethane silent ball is produced.

Description

Technical Field

[0001] This invention relates to the field of silent ball printing technology, and particularly to a printing method for a fully printed polyurethane silent ball and the fully printed polyurethane silent ball. Background Technology

[0002] A silent ball is a soft, open-cell solid foam ball made with polyurethane soft foaming technology. It has excellent elasticity and can be used as a basketball dribble. Because there are many holes on the surface of the ball, it makes very little noise when dribbled, hence the name silent ball.

[0003] When existing silent balls are printed with various graphics and texts, a thin film with graphics and texts is formed on the surface of the ball. This film covers the holes on the surface of the silent ball, and when it is tapped, it will make a loud noise and lose its silent effect.

[0004] Therefore, there is a need to provide a printing method for fully printed polyurethane silent balls and a fully printed polyurethane silent ball to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a printing method for a fully printed polyurethane silent ball and a fully printed polyurethane silent ball, to solve the problem in the prior art where the surface graphic film of the silent ball covers the pores on the surface of the silent ball, thus causing the silent ball to lose its silent effect.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a printing method for a fully printed polyurethane silent ball, characterized in that it includes:

[0007] S1: Prepare a flower-shaped hemisphere, wherein a release layer is provided on the inner side of the flower-shaped hemisphere, and an ink layer is provided on the side of the release layer away from the flower-shaped hemisphere, and two flower-shaped hemispheres are provided;

[0008] S2: Prepare an adhesive, wherein the adhesive is a two-component PU adhesive, comprising an A-component containing NCO isocyanate and a B-component containing hydroxyl groups;

[0009] S3: The floral membrane hemisphere is bonded to the polyurethane silencing ball using the adhesive. The polyurethane silencing ball has recessed holes on its surface. The specific steps include:

[0010] S31: Apply the adhesive evenly to the inside of the flower membrane hemisphere;

[0011] S32: Place the polyurethane silencing ball inside the flower membrane hemisphere, and splice the two flower membrane hemispheres together to cover the polyurethane silencing ball.

[0012] S4: After the adhesive gels and becomes adhesive, the two flower-shaped hemispheres are detached from the polyurethane silent ball. The ink layer is adhered to the surface of the polyurethane silent ball by the adhesive, and the ink layer and the adhesive form a gel layer.

[0013] S5: Tap the surface of the polyurethane silencing ball with a non-stick silicone plate to cause the gel layer to collapse into the concave holes on the surface of the polyurethane silencing ball, and the gel layer to break at the corresponding concave holes, thereby forming holes.

[0014] S6: After the gel layer is cured, it is made into a fully printed polyurethane silent ball.

[0015] In this invention, S1 includes:

[0016] S11: Prepare the sheet material;

[0017] S12: Print a release layer on one side of the sheet;

[0018] S13: Print graphics on one side of the release layer to form an ink layer;

[0019] S14: The sheet is vacuum-formed into a hemisphere, and the ink layer is disposed on the inner side of the hemisphere, thereby forming a patterned hemisphere.

[0020] In this invention, in step S2, the A glue and B glue are mixed in a 1:1 ratio.

[0021] In this invention, in step S5, according to the formula: Deformation rate = h / (h+d), where h is the deformation height of the polyurethane silencing ball, d is the height of the polyurethane silencing ball after deformation, and h+d is the diameter of the polyurethane silencing ball before deformation.

[0022] The force applied to the surface of the polyurethane silent ball is such that the deformation rate is between 10% and 20%.

[0023] In this invention, the tapping stop condition is that the change in the pore coverage of the gel layer on the surface of the polyurethane silent ball is less than a set value within a set time.

[0024] In this invention, in step S6, the pore coverage of the gel layer is between 20% and 60%.

[0025] In this invention, in step S14, a hemispherical brim is also provided on the periphery of the hemispherical body after vacuum forming;

[0026] In step S32, the hemispherical brims of the two flower-shaped hemispheres are locked together, so that the surface of the polyurethane silent ball is in contact with the inner surface of the two hemispherical brims of the two flower-shaped hemispheres.

[0027] In this invention, in step S13, the ink layer may be provided in several groups, and the several groups of ink layers are sequentially stacked on the release layer.

[0028] The present invention also provides a fully printed polyurethane silencing ball, which is manufactured by the above-described printing method for a fully printed polyurethane silencing ball.

[0029] The fully printed polyurethane sound-absorbing spheres include:

[0030] Polyurethane sound-absorbing spheres, wherein the surface of the polyurethane sound-absorbing spheres is provided with concave holes for sound absorption; and

[0031] A gel layer is disposed on the outer surface of the polyurethane silencing ball. The gel layer includes an ink layer and an adhesive. The ink layer is adhered to the surface of the polyurethane silencing ball by the adhesive.

[0032] The gel layer has pores that communicate with the recesses.

[0033] In this invention, the coverage of the holes is between 20% and 60%.

[0034] Compared to existing technologies, the advantages of this invention are as follows: The printing method of the fully printed polyurethane sound-absorbing ball and the fully printed polyurethane sound-absorbing ball of this invention, through the use of a hemispherical patterned film with a release layer and an ink layer, ensure that the ink layer is uniformly covered on the surface of the polyurethane sound-absorbing ball, improving printing quality and uniformity. The PU two-component adhesive, as a binder, provides good adhesion and durability, allowing the ink layer to firmly adhere to the surface of the polyurethane sound-absorbing ball. By disassembling the hemispherical patterned film and the polyurethane sound-absorbing ball, the ink layer can be completely adhered to the surface of the polyurethane sound-absorbing ball, forming a gel layer. By tapping the polyurethane sound-absorbing ball with a non-stick silicone plate, the gel layer can collapse and connect with the pores on the surface of the polyurethane sound-absorbing ball to form holes, further increasing the sound absorption effect. After the gel layer cures, a fully printed polyurethane sound-absorbing ball can be produced, which has a long service life and stable quality.

[0035] The fabricated fully printed polyurethane sound-absorbing spheres achieve sound absorption through the concave holes on the surface and the pores in the gel layer. The pores allow for air circulation, ensuring both sound absorption and the clarity of the ink layer's graphics. This creates a thin film with graphics on the surface of the polyurethane sound-absorbing spheres, enhancing the overall visual appeal of the fully printed polyurethane sound-absorbing spheres. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of the present invention.

[0037] Figure 1 This is a flowchart illustrating the printing method of a fully printed polyurethane silent ball according to a preferred embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram of the sheet structure according to a preferred embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the flower membrane hemispherical structure according to a preferred embodiment of the present invention.

[0040] Figure 4 This is a curing state curve of the adhesive according to a preferred embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the surface structure of the polyurethane silencing ball according to a preferred embodiment of the present invention.

[0042] Figure 6 for Figure 5 The cross-sectional view at point 1-1 in the diagram.

[0043] Figure 7 This is a schematic diagram of the combination of the polyurethane silent ball and the flower film hemisphere in a preferred embodiment of the present invention.

[0044] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point C.

[0045] Figure 9 This is a partial structural diagram of the gel layer on the surface of a polyurethane silencing ball, according to a preferred embodiment of the present invention.

[0046] Figure 10 for Figure 9 The cross-sectional view at point 2-2 in the diagram.

[0047] Figure 11 This is a schematic diagram of the gel layer structure on the surface of the tapping polyurethane silent ball according to a preferred embodiment of the present invention.

[0048] Figure 12 for Figure 11 The cross-sectional view at point 3-3 is shown in the figure.

[0049] Figure 13 This is a partial structural diagram of the surface of the fully printed polyurethane silent ball according to a preferred embodiment of the present invention.

[0050] Figure 14 for Figure 13 The cross-sectional view at point 4-4 is shown.

[0051] Figure 15 This is a schematic diagram of the structure of the patting polyurethane silent ball according to a preferred embodiment of the present invention.

[0052] Figures 16A-16CThis is a schematic diagram of the surface of the fully printed polyurethane silent ball formed under different tapping forces according to the present invention.

[0053] Figure reference numerals: 11, sheet material; 111, patterned hemisphere; 112, hemispherical brim; 12, release layer; 13, ink layer; 14, adhesive; 15, polyurethane silencing ball; 151, concave hole; 16, gel layer; 161, hole; 17, non-stick silicone board surface; h is the deformation height of the polyurethane silencing ball; d is the height of the polyurethane silencing ball after deformation. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0056] The terms "first" and "second" used in the terminology of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as limiting the order of events.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] The following is a printing method for a fully printed polyurethane silent ball that can solve the above technical problems, and a preferred embodiment of the fully printed polyurethane silent ball provided by the present invention.

[0059] Please refer to Figure 1 ,in Figure 1 This is a flowchart illustrating a preferred embodiment of the printing method for a fully printed polyurethane silencing ball according to the present invention. In the figure, structurally similar units are represented by the same reference numerals.

[0060] This invention provides a printing method for fully printed polyurethane silent spheres, the specific steps of which are as follows:

[0061] S1: Prepare a patterned hemisphere. A release layer is provided on the inner side of the patterned hemisphere. An ink layer is provided on the side of the release layer away from the patterned hemisphere. Two patterned hemispheres are provided. In this embodiment, two patterned hemispheres that can be spliced ​​together are preferred.

[0062] Combination Figure 2 and Figure 3 The specific steps for S1 are as follows:

[0063] S11: Prepare sheet 11; in this embodiment, sheet 11 is preferably PVC sheet 11.

[0064] S12: Print release layer 12 on one side of sheet 11.

[0065] S13: Print graphics on one side of release layer 12 to form ink layer 13.

[0066] S14: The sheet 11 is vacuum-formed into a hemisphere, and the ink layer 13 is placed on the inner side of the hemisphere to form a patterned hemisphere 111; a hemisphere brim 112 is also provided on the periphery of the vacuum-formed hemisphere to facilitate the assembly and disassembly of the two patterned hemispheres 111.

[0067] S2: Prepare adhesive 14, which is a two-component PU adhesive (two-component polyurethane adhesive), comprising an A component containing NCO isocyanate (NCO refers to the isocyanate group in chemical materials) and a B component containing hydroxyl groups; the A component and the B component are mixed in a 1:1 ratio.

[0068] In this embodiment, the adhesive 14 is a two-component AB adhesive, which is a PU two-component solvent-free adhesive 14 with a solid content of 100%. Component A contains NCO isocyanate, and component B contains hydroxyl groups.

[0069] In this embodiment, the adhesive 14 exhibits high bonding strength with the polyurethane sound-dampening ball 15, while also possessing flexibility, elasticity, tear resistance, and a comfortable feel. In particular, the adhesive 14 exhibits strong initial tack and a long gel time; the time from liquid to gel is relatively short, approximately 30 minutes, the gel duration is approximately 90 minutes, and the time from solid to complete curing is approximately 12 hours. Figure 4 As shown. Therefore, ink layer transfer and surface treatment operations can be performed while the adhesive 14 is in the gel state for up to 90 minutes.

[0070] S3: The flower film hemisphere 111 is attached to the polyurethane silent ball 15 by adhesive 14. The polyurethane silent ball 15 has concave holes 151 on its surface.

[0071] like Figure 5 and Figure 6 As shown, the polyurethane silent ball 15 in this embodiment is made of polyurethane foam material, which is soft and open-celled. Its surface has many concave holes 151, which have a sound-absorbing effect, so the sound is relatively small when it is hit. The fully printed polyurethane silent ball also has good elasticity and softness, and can be played with as a toy basketball.

[0072] like Figure 7 and Figure 8 As shown, the specific steps of S3 include:

[0073] S31: Apply adhesive 14 evenly to the inside of the flower film hemisphere 111.

[0074] S32: Place the polyurethane silencing ball 15 inside the flower membrane hemisphere 111, and splice the two flower membrane hemispheres 111 together to cover the polyurethane silencing ball 15.

[0075] The hemispherical brims 112 of the two floral membrane hemispheres 111 are fastened together, so that the surface of the polyurethane silent ball 15 is in contact with the inner surface of the two hemispherical brims 112 of the two floral membrane hemispheres 111.

[0076] Place the silent polyurethane sphere 15 inside the patterned film hemisphere 111; two corresponding patterned film hemispheres 111 are combined to form a complete patterned film sphere, with the silent polyurethane sphere 15 located inside the complete patterned film sphere. The surface of the polyurethane sphere 15 is tightly attached to the ink layer 13 on the inner side of the patterned film sphere, and the two hemispherical caps 112 are tightly clamped, so that all surfaces of the polyurethane sphere 15 are fully attached to the inner surfaces of the patterned film hemisphere 111 and the hemispherical caps 112. The above operations should be completed within 30 minutes of the adhesive 14 forming to facilitate the subsequent ink layer transfer operation.

[0077] S4: After the adhesive 14 gels and becomes adhesive, the two flower-shaped hemispheres 111 are detached from the polyurethane silencing ball 15. The ink layer 13 is adhered to the surface of the polyurethane silencing ball 15 by the adhesive 14, and the ink layer 13 and the adhesive 14 form a gel layer 16, as shown. Figure 9 and Figure 10 As shown.

[0078] Within a first set time period, the patterned hemisphere 111 is separated from the silent polyurethane ball 15, and the ink layer 13 is adhered to the surface of the silent ball by the adhesive 14. In this embodiment, the patterned hemisphere 111 and the polyurethane silent ball 15 are separated between 30 and 120 minutes after the A and B adhesives are mixed. At this time, after the adhesive 14 has gelled and has a certain degree of adhesion, the patterned hemisphere 111 and the hemispherical brim 112 are peeled off, and the ink layer 13 is completely adhered to the surface of the polyurethane silent ball 15 by the adhesive 14. The surface of the polyurethane silent ball 15 is now a gel layer 16 with ink, and its surface is smooth, flat, and non-porous.

[0079] S5: Tap the surface of the polyurethane silent ball 15 with the non-stick silicone plate 17. The gel layer 16 collapses into the recess 151 on the surface of the polyurethane silent ball 15, and the gel layer 16 breaks at the corresponding recess 151, thereby forming a hole 161.

[0080] like Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, the tapping stops when the change in the pore coverage of the gel layer 16 on the surface of the polyurethane silent ball 15 within a set time is less than a set value. This set time can be about 1 minute, and the change value is set to about 1%, meaning that the pore coverage of the gel layer 16 will not change significantly. Steps S4 and S5 above need to be performed between 30 and 120 minutes after the A and B adhesives are mixed to ensure the gel state of the gel layer 16.

[0081] In this embodiment, the striking force is defined by the deformation rate of the polyurethane silent ball 15 caused by striking it. Figure 15 As shown, the deformation rate is calculated according to the formula: Deformation rate = h / (h+d), where h is the deformation height of the polyurethane silencing sphere, d is the height of the polyurethane silencing sphere after deformation, and h+d is the diameter of the polyurethane silencing sphere before deformation.

[0082] Pore ​​coverage = Number of pores exposed by gel layer tearing / Number of pores on the surface of polyurethane sound-absorbing balls; the number of pores exposed by gel layer tearing, such as... Figure 13 The number of holes 161 on the surface of the polyurethane silencing ball 15 shown.

[0083] The method for detecting the pore coverage rate in this embodiment is to take a picture of the surface of the polyurethane silencing ball 15 before laying the gel layer 16. The pores 151 on the surface of the polyurethane silencing ball 15 appear as black dots in the picture. The number of pores 151 on the surface of the polyurethane silencing ball 15 is determined by the number of black dots.

[0084] Then, the surface of the polyurethane silent ball 15 covered with gel layer 16 is photographed. The holes 161 of gel layer 16 appear as black dots in the photograph. The number of holes 161 is counted by the number of black dots, and the hole coverage rate is calculated.

[0085] The following are the volume detection statistics of the polyurethane silent ball 15 made with different hitting forces during use:

[0086]

[0087] In areas with significant collapse, tiny cracks will appear, revealing the true color of the polyurethane silencing ball 15. The less force and the shorter the duration of the tapping, the less the gel collapses, and cracks will not appear, but the sound-dampening effect will be worse (at the first tapping force). Figure 16A As shown); the greater the force and the longer the duration of the tapping, the more cracks will appear in all the collapses, resulting in good sound absorption, but the surface graphics cannot be clearly displayed, and the overall printing effect is poor (the third tapping force). Figure 16B (As shown).

[0088] Therefore, the experiment shows that under the second striking force ( Figure 16C As shown), the surface of the sphere has both collapse and a certain proportion of cracks. When the coverage of the pores 161 of the gel layer 16 is between 20% and 60% (i.e., 20%-60% of the pores on the surface of the sphere are exposed), the surface graphic effect is better and a better sound damping effect can be achieved. Of course, if the user has higher requirements for the sound damping effect, the coverage of the pores after the sphere is hit can be increased.

[0089] Furthermore, the polyurethane silent ball 15 can be tapped and kneaded in various ways while in the gel state, causing the gel layer to collapse and break into holes. The size and porosity of the holes can be adjusted. The core of this invention is the tapping deformation of the gel layer 16 in the transfer state. The collapse and breakage of the gel layer 16 have both the continuity of the graphics and the broken holes, thus realizing the silent function of the fully printed polyurethane silent ball.

[0090] S6: After the gel layer 16 is cured, a fully printed polyurethane silencing ball is formed. The coverage of the pores 161 of the gel layer 16 is between 20% and 60%. The fully printed polyurethane silencing ball, while ensuring the sound absorption effect, can also ensure the clarity of the graphics on the ink layer 13, thus improving the comprehensiveness of the graphic display of the fully printed polyurethane silencing ball of this application.

[0091] In summary, this invention provides a printing method for fully printed polyurethane silent spheres.

[0092] Through the above-mentioned preferred scheme, it is possible to obtain polyurethane silencing balls with full-color printed graphics on the surface and a certain number of concave cracks on the surface. Although the diameter of these cracks is smaller than the original concave diameter, they can still achieve the sound absorption effect, thus realizing the preparation of fully printed polyurethane silencing balls.

[0093] The fully printed polyurethane silencing ball provided by this invention is flexible, elastic, and comfortable to the touch. Through the concave holes 151 on the surface of the polyurethane silencing ball 15 and the pores 161 in the gel layer 16, it achieves a sound-absorbing effect. The pores 161 in the gel layer 16 allow for air circulation, ensuring both sound absorption and the clarity of the ink layer 13's graphics. This creates a thin film with graphics on the surface of the polyurethane silencing ball 15, enhancing the overall graphic display of the fully printed polyurethane silencing ball of this application. The fully printed polyurethane silencing ball provided by this invention maintains both the pores 161 on the surface of the polyurethane silencing ball 15 for sound absorption and the continuity of the graphics; thus achieving the excellent effect of the fully surface color-printed silencing ball of this application.

[0094] In addition, the above steps can be replaced in some ways. For example, the three-layer printed film can be made into four layers. As for the adhesive 14, it is not limited to a two-component adhesive with a 1:1 ratio. The adhesive 14 can be a three-component adhesive or a flexible adhesive, but it must have a certain gelation time. At this time, the adhesive is in a colloidal state. Any adhesive that can form a relatively long gelation time can be used to replace the adhesive of the present invention.

[0095] The concave holes of the polyurethane silent ball 15 can be large or small; regardless of the method used, the gel layer 16 must be tapped and collapsed to create holes in order to achieve the effect of this application.

[0096] The present invention also provides a fully printed polyurethane silencing ball, which is manufactured by the printing method of the fully printed polyurethane silencing ball in the above embodiments; the fully printed polyurethane silencing ball includes a polyurethane silencing ball 15 and a gel layer 16; the surface of the polyurethane silencing ball 15 is provided with recesses 151 for sound absorption; the gel layer 16 is disposed on the outer surface of the polyurethane silencing ball 15, and the gel layer 16 includes an ink layer 13 and an adhesive 14, the ink layer 13 being adhered to the surface of the polyurethane silencing ball 15 by the adhesive 14.

[0097] The gel layer 16 has pores 161 that are connected to recesses 151, and the coverage of the pores 161 is between 20% and 60%.

[0098] The fully printed polyurethane silencing ball of this application achieves sound absorption through the concave holes 151 on the surface of the polyurethane silencing ball 15 and the pores 161 in the gel layer 16. The coverage of the pores 161 is between 20% and 60%, which allows for air circulation. While ensuring the sound absorption effect, it also ensures the clarity of the graphics in the ink layer 13, so that the surface of the polyurethane silencing ball 15 forms a thin film with graphics, thus improving the comprehensiveness of the graphic display of the fully printed polyurethane silencing ball of this application.

[0099] Furthermore, the combination of ink layer 13 and adhesive 14 within gel layer 16 provides better durability and adhesion. This results in a longer service life and better quality stability for the fully printed polyurethane silencing ball, making it suitable for various applications requiring reduced noise transmission.

[0100] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A printing method for a fully printed polyurethane silent ball, characterized in that, include: S1: Prepare a flower-shaped hemisphere, wherein a release layer is provided on the inner side of the flower-shaped hemisphere, and an ink layer is provided on the side of the release layer away from the flower-shaped hemisphere, and two flower-shaped hemispheres are provided; S2: Prepare an adhesive, wherein the adhesive is a two-component PU adhesive, comprising an A-component containing NCO isocyanate and a B-component containing hydroxyl groups; S3: The floral membrane hemisphere is bonded to the polyurethane silencing ball using the adhesive. The polyurethane silencing ball has recessed holes on its surface. The specific steps include: S31: Apply the adhesive evenly to the inside of the flower membrane hemisphere; S32: Place the polyurethane silencing ball inside the flower membrane hemisphere, and splice the two flower membrane hemispheres together to cover the polyurethane silencing ball. S4: After the adhesive gels and becomes adhesive, the two flower-shaped hemispheres are detached from the polyurethane silent ball. The ink layer is adhered to the surface of the polyurethane silent ball by the adhesive, and the ink layer and the adhesive form a gel layer. S5: Tap the surface of the polyurethane sound-dampening ball with a non-stick silicone pad to cause the gel layer to collapse into the recesses on the surface of the polyurethane sound-dampening ball, causing the gel layer to rupture at the corresponding recesses, thereby forming holes. In S5, according to the formula: Deformation rate = h / (h+d), h is the deformation height of the polyurethane silencing ball, d is the height of the polyurethane silencing ball after deformation, and h+d is the diameter of the polyurethane silencing ball before deformation. The force applied to the surface of the polyurethane silent ball is such that the deformation rate is between 10% and 20%. The collapse and rupture of the gel layer have both the continuity of the graphics and the ruptured holes, thus realizing the silent function of the fully printed polyurethane silent ball. S6: After the gel layer is cured, it is made into a fully printed polyurethane silent ball.

2. The printing method for the fully printed polyurethane silent sphere according to claim 1, characterized in that, S1 includes: S11: Prepare the sheet material; S12: Print a release layer on one side of the sheet; S13: Print graphics on one side of the release layer to form an ink layer; S14: The sheet is vacuum-formed into a hemisphere, and the ink layer is disposed on the inner side of the hemisphere, thereby forming a patterned hemisphere.

3. The printing method for the fully printed polyurethane silent sphere according to claim 1, characterized in that, In step S2, adhesive A and adhesive B are mixed in a 1:1 ratio.

4. The printing method for the fully printed polyurethane silent sphere according to claim 1, characterized in that, In step S5, the tapping stop condition is that the change in the pore coverage of the gel layer on the surface of the polyurethane silent ball is less than a set value within a set time.

5. The printing method for the fully printed polyurethane silent sphere according to claim 1, characterized in that, In step S6, the pore coverage of the gel layer is between 20% and 60%.

6. The printing method for the fully printed polyurethane silent sphere according to claim 2, characterized in that, In S14, a hemispherical brim is also provided on the periphery of the vacuum-formed hemisphere. In step S32, the hemispherical brims of the two flower-shaped hemispheres are locked together, so that the surface of the polyurethane silent ball is in contact with the inner surface of the two hemispherical brims of the two flower-shaped hemispheres.

7. The printing method for the fully printed polyurethane silent sphere according to claim 2, characterized in that, In step S13, the ink layer is provided in several groups, and the several groups of ink layers are sequentially stacked on the release layer.

8. A fully printed polyurethane silent ball, characterized in that, Made by the printing method of any one of claims 1-7 for the fully printed polyurethane silent sphere; The fully printed polyurethane sound-silencing spheres include: Polyurethane sound-absorbing spheres, wherein the surface of the polyurethane sound-absorbing spheres is provided with concave holes for sound absorption; and A gel layer is disposed on the outer surface of the polyurethane silencing ball. The gel layer includes an ink layer and an adhesive. The ink layer is adhered to the surface of the polyurethane silencing ball by the adhesive. The gel layer has pores that communicate with the recesses.

9. The fully printed polyurethane silent ball according to claim 8, characterized in that, The coverage of the holes is between 20% and 60%.

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