阅读说明：本技术 一种激光雕刻方法 (Laser engraving method ) 是由 武大军 于 2020-06-17 设计创作，主要内容包括：本发明提供了一种激光雕刻方法,包括在提供的基板表面涂覆第一油墨,在所述涂覆第一油墨的所述基板的所述表面进行激光雕刻图案,在所述基板的所述表面的所述雕刻图案上涂覆第二油墨,通过本发明,可解决在现有基板上进行激光雕刻难以获得彩色图案的问题,同时可以在基板上呈现出较为复杂的彩色图案,满足市场高层次的需求。(The invention provides a laser engraving method, which comprises the steps of coating first printing ink on the surface of a provided substrate, performing laser engraving patterns on the surface of the substrate coated with the first printing ink, and coating second printing ink on the engraved patterns on the surface of the substrate.)

1. A laser engraving method, characterized in that it comprises at least the following steps:

coating first printing ink on one surface of the substrate;

performing a laser engraving pattern on the surface of the first ink-coated substrate;

applying a second ink on the engraved pattern on the surface of the substrate.

2. The laser engraving method of claim 1, wherein the substrate is glass, plastic, ceramic or crystal.

3. The laser engraving method of claim 1, further comprising: and coating the first ink on the back surface of the substrate by using a screen printer.

4. The laser engraving method of claim 3, wherein the screen printer is one of a flat screen printer, a curved screen printer, a rotary screen printer and an electrostatic screen printer.

5. The laser engraving method of claim 1, further comprising: and in the process of engraving the pattern by laser, covering a protective film on the substrate.

6. The laser engraving method of claim 5, wherein the protective film is one of a wet newspaper, a platinum sheet, and an adhesive tape.

7. The laser engraving method of claim 1, further comprising: the manner of applying the second ink on the engraved pattern includes: spray gun spraying paint, writing brush painting and needle tube painting.

8. The laser engraving method of claim 1, further comprising: a second ink is applied over the engraved pattern using a screen printer.

9. The laser engraving method as claimed in claim 1, wherein a laser engraving machine is used to perform laser engraving on the back surface of the substrate, the laser engraving machine has a dimension of 1500-2000mm, a width of 800-1200mm and a height of 1000-1500 mm.

10. The laser engraving method of claim 9, wherein the laser heads of the laser engraving machine include a red laser head, a violet laser head, a blue laser head, and a green laser head.

Technical Field

The invention relates to the technical field of engraving equipment, in particular to a laser engraving method.

Background

The laser engraving technology is based on numerical control technology, and laser is a processing medium. The physical denaturation of the processing material due to instant melting and gasification under the irradiation of laser engraving can enable the laser engraving to achieve the purpose of processing. The laser engraving is to use laser technology to engrave patterns or characters on an object, the patterns or characters engraved by the technology have no nicks, the surface of the object is still smooth, and the patterns or characters cannot be abraded. In addition, the soft material is not contacted with the surface of the material, is not influenced by mechanical motion, does not deform on the surface, generally does not need to be fixed, is not influenced by the elasticity and the flexibility of the material, and is convenient to process the soft material.

The laser engraved patterns or characters are colorless, some are only the natural color of the material, or the color of the material after high-temperature oxidation, but the laser engraved patterns or characters are expected to have bright colors in many fields of practical application, so the laser engraving technology for obtaining the colored patterns or characters is the direction of research and development.

Disclosure of Invention

The invention aims to provide a laser engraving method, which solves the problem that a colorful pattern is difficult to obtain by laser engraving on a substrate in the prior art through a mode of coating ink for multiple times.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a laser engraving method, which at least comprises the following steps: coating first printing ink on one surface of the substrate; performing a laser engraving pattern on the surface of the first ink-coated substrate; applying a second ink on the engraved pattern on the surface of the substrate.

In one embodiment, the substrate is glass, plastic, ceramic, or crystal.

In an embodiment, the method further comprises: and coating the first ink on the back surface of the substrate by using a screen printer.

Further, the screen printer is one of a flat screen printer, a curved screen printer, a rotary screen printer, and an electrostatic screen printer.

In an embodiment, the method further comprises: and in the process of engraving the pattern by laser, covering a protective film on the substrate.

Further, the protective film is one of wet newspaper, a platinum sheet and an adhesive tape.

In an embodiment, the method further comprises: the manner of applying the second ink on the engraved pattern includes: spray gun spraying paint, writing brush painting and needle tube painting.

In an embodiment, the method further comprises: a second ink is applied over the engraved pattern using a screen printer.

In an embodiment, a laser engraving machine is used to perform laser engraving on the back surface of the substrate with color, and the laser engraving machine has a size of 1500-.

Further, the laser head of the laser engraving machine comprises a red light laser head, a purple light laser head, a blue light laser head and a green light laser head.

The invention obtains the substrate with the colorful patterns by a method of coating the ink for many times, and solves the problem that the colorful patterns are difficult to obtain by laser engraving on the substrate in the prior art. The laser engraving machine adopted in the invention comprises a plurality of engraving machines capable of emitting light with different colors, and can process a plurality of complex patterns. The laser engraving machine disclosed by the invention is large in size, and can be used for engraving large-size substrates by laser.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

Fig. 1 is a process flow diagram of a laser engraving method.

Fig. 2 is a production flow chart of the laser engraving process.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, the present invention is a laser engraving method, which at least includes the following steps: step S1: providing a substrate; step S2: coating first printing ink on one surface of the substrate; step S3: performing a laser engraving pattern on the surface of the first ink-coated substrate; step S4: a second ink is applied on the engraved pattern on the surface of the substrate, and further, a surface of the substrate may be selected, for example, a back surface of the substrate.

In step S1, the substrate may be glass, plastic, ceramic, or crystal, such as glass, but not limited thereto.

In steps S2 and S4, the first ink and the second ink may be applied using a screen printer, which may be one of a flat screen printer, a curved screen printer, a rotary screen printer, and an electrostatic screen printer. In step S4, the second ink may be applied to the engraved pattern by one of spray gun painting, brush painting, and needle tube painting.

In step S2, to satisfy the diversity and complexity of the engraved pattern, the first ink application may include multi-layer printing, such as 3 layers, 5 layers, and 7 layers, and in one embodiment of the present invention, the first ink application includes 3-layer printing.

In step S4, the second ink application may also include multi-layer printing, such as 3, 4, 5, 7 layers, and in one embodiment of the present invention, the second ink application includes 4 layers of printing;

further, the first ink and the second ink can be obtained by weighing ink raw materials, additives and diluents and blending and stirring the materials in proportion, wherein the weight ratio of the additives can be 0.5% -5%, such as 2%, the weight ratio of the diluents can be 0-5%, such as 5%, the viscosity of the first ink and the second ink can be 2000-14000mpa.s, and in yet another embodiment of the invention, the additives can be the beauty aids XC 3-262.

In one embodiment of the present invention, for example, a flat screen printer with a doctor angle of 60 to 80 °, a doctor angle of 60 to 90 °, a printing speed of 15 to 35HZ, and a return speed of 20 to 45HZ may be used for printing the first and second inks.

Further, the flat screen printer also comprises a screen printing plate manufacturing process before printing; the screen printing plate manufacturing process can comprise screen stretching, washing, developing and checking, and further, the mesh number in the screen collapsing process can be 80-300, such as 150, 200 and 300; further, the warp tension and the weft tension in the screen stretching process can be adjusted according to the mesh number of the screen, further, the cleaning process can uniformly wet and clean the screen by using clean water, further, the size, appearance, logo and pattern of the film can be checked before the developing process, the developing process can include an exposure step, the exposure step can be performed in an exposure machine, the energy of the exposure machine can be set according to the mesh number, for example, 150 and 300J, for example, 190J, 230J, 240J and 280J, the exposure step can be followed by a plate drying process, and the plate drying time can be 30-60min, for example, 45min and 60 min; the inspection process may include inspecting the screen printing area for breakage or for too low a screen tension, etc.

In steps S2 and S4, the screen printing of the first ink and the second ink first forms a pattern of corresponding printing items on a screen, places the first ink and the second ink on corresponding screens, and prints the first ink and the second ink on the substrate through the flat screen printer, and further, after each layer of printing items of the first ink and the second ink are completed, a baking process may be further included, in an embodiment of the present invention, the baking process may employ one or a combination of a mesh belt type baking tunnel baking and a roller type baking tunnel baking, the baking temperature may be 150-.

In step S3, the laser engraving pattern further includes: in the process of carving patterns by laser, covering a protective film on the substrate, wherein the protective film can help the surface of the substrate to be cooled during laser carving; in which covering a wet newspaper as a protective film is a common method, further platinum sheet or adhesive tape may be selected.

Further, a laser engraving machine is used to perform laser engraving on the back surface of the substrate, the size of the laser engraving machine may be, for example, 1500-.

Further, the parameters of the laser engraving machine can be set, the laser frequency can be 10-50KHz, the power control can be 1% -100%, and the engraving speed can be 1000-: 30KHz, power control: 65%, engraving speed: 2500 mm/s.

Further, the laser head of the laser engraving machine can comprise a red light laser head, a purple light laser head, a blue light laser head and a green light laser head, lasers with different wavelengths can be used on different substrates, and the pattern capable of processing patterns is widened.

In one embodiment of the present invention, in order to improve the strength and operability of the substrate, the substrate may be pretreated before the first ink is applied, and the substrate pretreatment includes, but is not limited to, substrate inspection, substrate cutting, substrate edging, cleaning, and tempering.

The substrate inspection may be to inspect the length, width and thickness of the substrate by using a caliper and a micrometer, inspect the appearance and glass color by using naked eyes, the substrate may be a large substrate, the length of the large substrate may be 2000 + 4000mm, such as 2440mm, 3300mm, 3660mm, the width may be 1500 + 3500mm, such as 2360mm, 2440mm, 3300mm, the thickness may be 3-6mm, such as 3.2mm, 4mm, 6mm, further, the large substrate specification may be selected, for example: 2360 3660 mm.

Further, the substrate cutting may be performed by a dicing saw, the diameter of a cutter wheel of the dicing saw for substrate cutting may be 4-10mm, the angle of the cutter wheel may be 145-200 °, the pressure of the cutter wheel may be 1-1.5P, the cutting speed may be 100000-180000M/H, and the size of the substrate after cutting may be, for example: length 1713.5mm, width 390 mm; further, the cutting can also be water knife cutting, and the cutting speed of the water knife cutting can be 0.5-1 m/min.

The edge grinding of the substrate can be performed in various manners such as manual edge grinding or CNC edge grinding, in an embodiment of the present invention, CNC edge grinding can be performed, further, CNC edge grinding can be performed on the cut substrate for a plurality of times, for example, 2 times, according to requirements, the CNC edge grinding is performed on the cut substrate by using a CNC edge grinding machine, the rotation speed of a motor of the edge grinding machine is 4500-7000r/min, the grinding amount can be 0.5-1mm, for example, 0.5mm, and the edge grinding linear speed is 0.5-8m/min, for example, 1m/min, 5 m/min; further, the edging linear speed can be set according to a grinding amount, and further, the grinding amount is proportional to the edging linear speed, and in an embodiment of the present invention, the length of the edged substrate is 1712.5mm, and the width of the edged substrate is 389 mm.

The cleaning may be performed on the edge-polished substrate by using a cleaning machine.

In addition, the cleaned substrate can be tempered by a tempering furnace, that is, the cleaned glass is put into the tempering furnace, and the tempering furnace can be divided into a preheating section, a heating section and a cooling section; the substrate is preheated by the preheating section, then enters the heating section for heating, and then enters the cooling section for cooling, wherein the cooling section can be divided into a high-pressure cooling section and a low-pressure cooling section; in the preheating section, the temperature in the toughening furnace is 300-700 ℃, in the heating section, the temperature in the toughening furnace is 500-800 ℃, and the heating time is 100-200 s; in the high-pressure cooling section, the opening degree of quenching wind pressure of the toughening furnace is 60-80%, and the quenching time is 50-80 s; in the low-pressure cooling section, the opening degree of cooling wind pressure of the toughening furnace is 80-100%, and the quenching time is 50-80 s; in one embodiment of the invention, the distance between the air grids of the high-pressure cooling section is 2260 mm; the distance of the air grid of the low-pressure cooling section is 6360 mm.

Further, the pretreated substrate may be stored in a warehouse using a transfer cart to perform the steps of S1 to S4.

Further, it is also right after the second printing ink coating is all accomplished the glass substrate is inspected and is packed, the inspection can be visual inspection, the material for packing can be B tile paper backing plate, paper angle bead for the blank identification card of sign to and be used for packing the cork gasket of protection, the foam piece, PE packaging film, PET membrane etc. that looses, specific consumptive material can be according to the different packing demands preparation of customer.

The application of the laser engraving method can be applied to the field of household appliances, can be commonly used for manufacturing door bodies of refrigerators, freezers and various display cabinets, for example, a glass panel in a glass door body of a side-by-side refrigerator can present various colored patterns through the laser engraving method, and is attractive, clean, fresh and transparent.

The application of the laser engraving method can also be used in the field of manufacturing various artworks, plays a role in advertisement decoration, and can be commonly applied to the manufacturing of various colored patterns on crystal, plastic and ceramic substrates, such as manufacturing of medals and plaque.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.