CN115732255A - Manufacturing process of keycaps with multi-color symbols - Google Patents

Abstract

The invention relates to a key cap with multiple color-changing symbols and a manufacturing process thereof, and the key cap comprises a key cap and a film adhered to the surface of the key cap, wherein a display symbol and at least one invisible symbol are printed on the film, the display symbol is visible under normal light, the invisible symbol is invisible under normal light, and the invisible symbol is displayed under the irradiation of an ultraviolet light source or an infrared light source; the manufacturing process comprises the following steps: s1: respectively printing a display symbol and at least one invisible symbol on the film, S2: and (3) in-mold forming: fix the film at injection moulding machine's inner wall and carry out injection moulding to the key cap to key cap and film integrated into one piece. The keycap manufactured by the invention only displays the display symbol visible under normal light, and different invisible symbols are changed under the irradiation of the ultraviolet light source or the infrared light source, and the effect of the common display symbol is recovered after the light is changed, thereby the appearance of the keyboard has variability.

Description

Manufacturing process of keycaps with multi-color symbols

Technical Field

The invention relates to the field of computer peripheral equipment, in particular to a manufacturing process of a keycap with a multi-color-changing symbol.

Background

As an input device, the function of the keyboard is self-evident, and the key caps are important components of the keyboard, and the character processes used by the key caps with different purposes and materials are different, wherein the most common are laser etching, screen printing, laser filling, hollow printing, double-color molding and the like. No matter which character process is adopted, only the display symbol is arranged on the keycap, so that the appearance is monotonous. With the improvement of the quality of the nation, the requirement of the nation for beauty and individuation is more and more, so the requirement on the decoration of the keyboard is higher and higher.

In the prior art, chinese patent document CN110676101A discloses a key cap for displaying different symbols, which includes a main body, a symbol, and a light source. The main body is made of opaque material, the symbols are made of semi-transparent material, each different symbol is made of semi-transparent material with different colors, the light source is a multicolor light source or a plurality of light sources with different colors, corresponds to the color of the symbol and is placed below the characters and the patterns. In the technical scheme, the keycaps are printed or carved with a plurality of symbols, and the symbols displayed in different colors are displayed, so that the symbols displayed in the colors are reminded to have the function of displaying the colors after the key is pressed.

In the prior art, chinese patent document CN102832070B discloses a manufacturing process of a light-emitting keyboard, which includes the following steps: providing a transparent material layer to form a light transmission layer of the keycap; forming a light shielding layer on the surface of the outer side of the light transmitting layer; a laser engraving process is adopted to engrave and define a light transmitting area and a light shielding area on the surface of the light shielding layer, the light shielding area corresponds to the area where the light shielding layer is located, and the light transmitting area is formed by removing the light shielding layer area; and forming a surface color layer on the outer surface of the keycap. The surface of the luminous keyboard keycap is processed to form the shading area and the light-transmitting area with different light transmittances, so that the keyboard display meets the use requirement, and the appearance is effectively improved.

The applicant has found that infrared laser powder can generate color change under the action of an external excitation light source, and the infrared laser powder is applied to the current fields.

Disclosure of Invention

In order to solve the problems, the invention provides a manufacturing process of a keycap with a multi-color-changing symbol.

In order to achieve the purpose, the key cap with the multi-color-changing symbol comprises the key cap and a film attached to the surface of the key cap, wherein a display symbol layer and at least one invisible symbol layer are arranged on the film, the display symbol layer is visible under normal light, the invisible symbol layer is invisible under normal light, and the invisible symbol layer is displayed under the irradiation of ultraviolet light.

As an improvement, the film is from top to bottom including the substrate layer that piles up in proper order, from type layer, UV coating, printing ink layer, A1 evaporation coating, adhesion layer, the printing ink layer includes at least two-layer printing ink layer, is first printing ink layer and second printing ink layer respectively, first printing ink layer have the visible display symbol under the ordinary light, second printing ink layer visible stealthy symbol under having the ultraviolet ray.

A process for manufacturing keycaps having multi-chromatic symbols, comprising the steps of:

s1: printing a display symbol and at least one invisible symbol on a film;

s2: and (3) in-mold forming: fix the film at the inner wall of injection moulding machine's cavity portion and carry out injection moulding to the key cap to key cap and film integrated into one piece.

The method comprises the following steps of S1, preparing a substrate, coating a functional release agent on one surface of the substrate, forming a release layer on the surface of the substrate, coating UV glue on the release layer, forming a UV layer through photocuring, coating first ink on the UV layer to form a first ink layer, wherein the first ink layer is provided with a display symbol, coating second ink on the first ink layer to form a second ink layer, the second ink layer is provided with an invisible symbol, the invisible symbol and the display symbol are printed in a staggered mode, forming an A1 evaporation layer on the display symbol and the invisible symbol by adopting an evaporation method on the surfaces of the display symbol and the invisible symbol, and coating an adhesive on the A1 evaporation layer.

As an improvement, the substrate layer is made of resin.

As an improvement, the thickness of the substrate layer is 0.038-0.05mm, the surface roughness of the release layer is 2.38-2.65 mu m, the thicknesses of the first ink layer and the second ink layer are 6-8 mu m, and the thickness of the A1 evaporation coating layer is 0.5-10.0 mu m.

As an improvement, wherein the UV layer is photocured with an intensity of 65-75W/cm, and the dosage is 260-300J/cm ² The irradiation time is 30-40s, and the UV layer strengthens the wear resistance.

As an improvement, the second printing ink contains infrared ray excitation powder or fluorescent powder.

As an improvement, a third ink layer is formed by coating a third ink on the second ink layer, the third ink layer is provided with invisible symbols, and the third ink contains infrared excitation powder or fluorescent powder.

As an improvement, in the step S2, the keycap is molded by using a completely transparent or semi-transparent material.

The invention has the beneficial effects that: the key cap of the invention makes the full-transparent or semi-transparent effect, the film printed with display symbol and a plurality of invisible symbols is pasted on the surface of the key cap, the film is integrated with the key cap by adopting the in-mold forming technology, the manufacturing process is simple and easy to realize, and a set of key cap molds do not need to be matched with different molds because of different characters on the key cap, the symbols are directly printed on the film, the symbol design can be changed at any time without changing the molds, the design is flexible, the product diversification can be quickly realized at lower cost, the invisible characters or patterns printed on the film can not be seen by sunlight or common light source irradiation, the invention can be coated with a plurality of layers of printing ink containing infrared excitation powder or fluorescent powder, the characters or patterns on different printing ink layers can be displayed by using ultraviolet rays with the wavelength of 200-280 nm or infrared light source irradiation of 980 nm, thereby the appearance of the key cap is changeable, and the invisible symbols can also be used as anti-fake marks.

Drawings

FIG. 1 is a schematic view of the present invention in normal light.

Fig. 2 is a schematic view of the present invention under irradiation of ultraviolet light.

Fig. 3 is a schematic view of the present invention under irradiation with infrared light.

Detailed Description

The invention relates to a manufacturing process of a keycap with a multi-color-changing symbol, which comprises the keycap and a film adhered to the surface of the keycap, wherein the film is provided with a display symbol layer and at least one invisible symbol layer, the display symbol layer is visible under normal light, the invisible symbol layer is invisible under normal light, and the invisible symbol layer is displayed under the irradiation of ultraviolet light; the manufacturing process comprises the following steps:

s1, printing a display symbol and at least one invisible symbol on a film, preparing a substrate, wherein the substrate is made of resin, such as PET, PC, PP and the like, in the embodiment, the substrate is made of PET with the thickness of 0.038-0.05mm, one surface of the PET is coated with a functional release agent to form a release layer, the surface roughness of the release layer is 2.38-2.65 mu m, the surface roughness of the coated functional release agent layer is 2.38-2.65 mu m, the release layer is coated with UV glue, and the UV layer is formed by photocuring; the light-cured intensity is 65-75W/cm, and the dosage is 260-300J/cm ² The irradiation time is 30-40s, the wear resistance of the UV layer is strengthened, a display symbol is printed on the UV layer to form a first ink layer with the thickness of 6-8 mu m, a stealth symbol is printed on the first ink layer to form a second ink layer with the thickness of 6-8 mu m, the ink adopted by the second ink layer contains infrared excitation powder, an A1 evaporation coating is formed on the surface of the second ink layer by adopting an evaporation method, the thickness of the A1 evaporation coating is 0.5-10.0 mu, so that the display symbol and the stealth symbol have a highlight effect, and an adhesion layer is coated on the A1 evaporation coating to better adhere the display symbol and the stealth symbol on the surface of a keycap;

s2: and (3) in-mold forming: fix the film at the inner wall of injection moulding machine's cavity portion and carry out injection moulding to the key cap to key cap and film integrated into one piece. The film has pasted a rete for the key cap surface in other words, has antifouling anti-injury effect, and in addition, the direct printing of symbol is on the film, and the symbol design can change at any time and need not to change the mould, and the design is nimble, realizes the product diversification fast with lower cost, uses ordinary injection mold just can accomplish the interior decoration process of mould, cancels film preforming and die-cut technology and corresponding mould, and mould development is easier, reduces mould input and equipment input.

As a refinement, the third ink layer may be applied after the second ink layer. The ink adopted by the third ink layer contains fluorescent powder.

Under normal light, the display symbol is shown in figure 1, under the irradiation of ultraviolet light source with wavelength of 200-280 nm, the hidden ultraviolet color image is shown in figure 2, and under the irradiation of infrared light source with wavelength of 980 nm, the hidden infrared color image is shown in figure 3. The invention can be realized by additionally arranging the ultraviolet light source and the infrared light source on the keyboard, and the arrangement of the light source in the keyboard is a conventional technical means in the field, and the detailed description is not provided herein.

The above embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the design of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims (10)

1. The utility model provides a key cap with changeable look sign which characterized in that: the invisible mark comprises a keycap and a film adhered to the surface of the keycap, wherein the film is provided with a display mark layer and at least one invisible mark layer, the display mark layer is visible under normal light, the invisible mark layer is invisible under normal light, and the invisible mark layer is displayed under the irradiation of an ultraviolet light source or an infrared light source.

2. A key cap with multi-changeable symbols according to claim 1, wherein: the film from top to bottom is including the substrate layer that piles up in proper order, release layer, UV coating, printing ink layer, A1 evaporation coating, adhesion layer, the printing ink layer includes at least two-layer printing ink layer, is first printing ink layer and second printing ink layer respectively, first printing ink layer have the visible display symbol under the ordinary light, second printing ink layer have the invisible symbol that is visible under ultraviolet light source or infrared light source shine.

3. A process for manufacturing a keycap having a multi-chromatic symbol according to claim 1, wherein: the method comprises the following steps:

s1: printing a display symbol and at least one invisible symbol on a film;

s2: and (3) forming in a mold: fix the film at the inner wall of injection moulding machine's cavity portion and carry out injection moulding to the key cap to key cap and film integrated into one piece.

4. A key cap with multi-changeable symbols according to claim 3, wherein: in S1, a substrate is prepared firstly, a functional release agent is coated on one surface of the substrate, a release layer is formed on the surface of the substrate, UV glue is coated on the release layer, a UV layer is formed through photocuring, a first ink layer is coated on the UV layer to form a first ink layer, the first ink layer is provided with a display symbol, a second ink layer is coated on the first ink layer to form a second ink layer, the second ink layer is provided with an invisible symbol, the invisible symbol and the display symbol are printed in a staggered mode, an A1 evaporation coating layer is formed on the display symbol and the invisible symbol surface by adopting an evaporation coating method, and an adhesive is coated on the A1 evaporation coating layer.

5. A key cap with multi-changeable symbols according to claim 4, wherein: the base material layer is made of resin.

6. A key cap with multi-changeable symbols according to claim 4, wherein: the thickness of the substrate layer is 0.038-0.05mm, the surface roughness of the release layer is 2.38-2.65 mu m, the thicknesses of the first ink layer and the second ink layer are 6-8 mu m, and the thickness of the A1 evaporation layer is 0.5-10.0 mu m.

7. A key cap with multi-changeable symbols according to claim 4, wherein: wherein the UV layer has light curing intensity of 65-75W/cm and dosage of 260-300J/cm ² The irradiation time is 30-40s.

8. A key cap with multi-changeable symbols according to claim 4, wherein: the second printing ink contains infrared excitation powder or fluorescent powder.

9. A key cap with multi-changeable symbols according to claim 4, wherein: and coating third printing ink on the second printing ink layer to form a third printing ink layer, wherein the third printing ink layer is provided with invisible symbols, and the third printing ink contains infrared excitation powder or fluorescent powder.

10. A key cap with multi-changeable symbols according to claim 3, wherein: and in the step S2, the keycaps are molded by adopting a completely transparent or semi-transparent material.

Images