Method and device for printing pictures and texts on surface of irregular object

Abstract

The invention relates to a method and a device for printing pictures and texts, particularly to a method and a device for printing fine pictures and texts on the surface of an irregular object, which comprises the following steps of: a. manufacturing a compound transfer printing film; b. pre-deforming the compound transfer printing film; c. placing the deformed compound transfer printing film in a plastic hollow blow molding mould, realizing transfer printing in the plastic molding process, or clinging the deformed compound transfer printing film to a printing undertaking object, and sharing through one or more modes of heating, infrared illumination, ultraviolet illumination and pressurization to realize transfer printing; and d. removing a substrate layer and a stripping layer. The invention has the advantages that the printing of fine pictures and texts can be carried out on the surfaces of a regular object and the irregular object, pictures and texts are continuous, whether the local surface or the entire surface can be printed once through the invention, and the invention has a good solution particularly for an object with a complicated surface.

Description

Technical field [0001] The invention relates to a method and device for printing pictures and texts, in particular to a method and a device for printing fine pictures and texts on the surface of irregular objects. Background technique [0002] The surface of all objects can be summarized as plane, cylinder, conical surface, arc surface, spherical surface, uneven surface, plane type such as flat plate and cube, etc.; cylindrical surface and conical surface such as bottle, barrel and drinking cup, etc.; arc Surfaces and spherical surfaces such as spheres, ellipsoids, etc.; uneven surfaces such as characters, animals, cartoon dolls, and some complex objects are composed of two or more types of surfaces mentioned above. The current printing technology has a mature technology for plane, cylinder, and conical surfaces and can achieve good results. However, for irregular objects containing curved surfaces, spherical surfaces, and uneven surfaces, such as balls, characters, animals,...

AI Technical Summary

Problems solved by technology

[0003] 1. Screen printing method. In recent years, there have been many screen printing machines for curved surfaces, which mainly use the limited flexible deformation of the screen and some rotational movement of the substrate to print graphics and text on the curved surface of the object. This method is because The flexible deformation of the screen has certain limitations, so it can only print pictures and texts on parts of the product, such as ball products, this technology can only print a picture and text strip on the equator of the ball, which only accounts for 1 / of the spherical surface 5

[0004] 2. Oil spraying method, spray the color on the surface of the product several times through a hollow mold to form a certain graphic decoration effect. This method is more suitable for products with large color blocks and simple graphics. For products that require fine graphics product, this method cannot resolve

Due to the limitation of the shape of the rubber roller, this method can only carry out heat transfer printing on the plane, cylindrical surface, and conical surface. Although the special-shaped rubber can be made into various shapes, it cannot achieve a large area on the surface of irregular objects because of the need for exhaust. printing, which can only be realized locally

[0006] 4. Dye-sublimation transfer printing, by heating the back of the sublimation transfer paper, the graphic layer is flown onto the substrate. Also due to the limitation of the heating material, graphic printing on regular surfaces and partial surfaces can only be achieved, and due to The temperature required by this method is very high, so that ordinary plastic products cannot bear it, only high-temperature-resistant engineering plastics can bear it, and a layer of polyester layer needs to be treated on the surface, and its application is also limited.

[0008] 6. Water draping, print the graphic layer on the water-based film, place the graphic layer up in the water tank, activate the ink layer through the activator, and stick the substrate tightly to realize the transfer of the graphic. This method has a good solution to the curved surface, but because the movement and deformation of the graphics and texts are irregular, only some simple and repetitive graphics and texts can be printed, and precise positioning cannot be performed.

[0021] Chinese patent 02825756.1 discloses a method and device for embossing graphics and text on a curved surface. Specifically, the flexible transfer film is deformed in one direction to conform to the curved surface of the substrate and then heat-pressed. Although the method mentions the use of flexible film to deform in accordance with the surface of the substrate, it is limited to two-dimensional deformation and still cannot solve the printing problem of three-dimensional surfaces.

[0022] In summary, none of the existing methods can be used on the surface of irregular objects, such as balls, ellipsoids containing arcs, spheres, uneven surfaces, cartoon dolls, three-dimensional animals, and character dolls. Print fine graphics and text, especially when the graphics and text on the surface of the entire product are required to be continuous in whole or in part, none of the above methods can meet its requirements

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