Packaging box with different-color mark and injection molding method and device thereof

Abstract

The invention discloses a packaging box with a different-color mark and an injection molding method and device thereof. The packaging box comprises a box body formed by injection molding of a plasticmaterial with one color, and a different-color mark body formed by injection molding of a plastic material with another color on the box body. When the packaging box with the different-color mark is subjected to injection molding, S1, firstly, the box body formed by injection molding of the plastic material with one color is obtained in the molding device in an injection molding mode, and a grooveformed through synchronous injection molding is formed in the position, needing to be subjected to injection molding marking, of the box body; and S2, the groove is filled with the plastic with the another color to form the different-color mark body with a flat surface. Compared with a conventional marking and forming mode, the different-color mark of the packaging box has the characteristics ofbeing remarkable, firm and simple in process, and the requirement of the packaging box for the mark can be greatly met.

Description

technical field [0001] The invention relates to a packaging box with different-color marks, an injection molding method and a device. Background technique [0002] For plastic packaging boxes, the marks are usually obtained in the following ways: ① Synchronously form logo marks or other marks during injection molding (that is, the inner cavity of the mold has a corresponding concave or convex reverse mark shape), but this method is due to The mark and the box body are integrally formed of the same material, which often has the disadvantage that the mark is not obvious; ② or after the molding is demoulded, the marking equipment is used alone to form a corresponding concave or convex mark on the inner or outer surface of the packaging box. It is relatively complex and also has the same inconspicuous characteristics due to the same material, and it is easy to damage the box body by marking alone; ③ or after forming, other color marks are formed by hot stamping, but there is als...

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Problems solved by technology

[0002] For plastic packaging boxes, the marks are usually obtained in the following ways: ① Synchronously form logo marks or other marks during injection molding (that is, the inner cavity of the mold has a corresponding concave or convex reverse mark shape), but this method is due to The mark and the box body are integrally formed of the same material, which often has the disadvantage that the mark is not obvious; ② or after the molding is demoulded, the marking equipment is used alone to form a corresponding concave or convex mark on the inner or outer surface of the packaging box. It is relatively complex and also has the same inconspicuous characteristics due to the same material, and it is easy to damage the box body by marking alone; ③ or after forming, other color marks are formed by hot stamping, but there is also the problem of complicated process, and hot stamping It is also easy to damage the box body during printing and has higher requirements on the hot stamping process; ④ There is also a new type of laser marking material developed, that is, after injection molding, the material is irradiated with laser light. Due to the characteristics of the new material, the material itself will Carbonization or other reactions form a variety of marks of different colors. This technology is relatively advanced, but there are deficiencies in the requirements for high material performance, and the development is difficult and costly.

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