阅读说明：本技术 汽车仪表刻度盘图案扭曲调整印刷工艺方法 (Automobile instrument dial pattern distortion adjustment printing process method ) 是由 朱伟东 于 2021-08-30 设计创作，主要内容包括：本发明公开了汽车仪表刻度盘图案扭曲调整印刷工艺方法,涉及汽车表盘印刷技术领域。本发明是结合工程设计软件绘制而成,通过在仪表标度盘图案上设置等间距的网格线,并通过印刷及成型后再加以调整,以达到弥补和控制图案变形的工艺方法；采用本发明可简化印刷工序,具有成本低、时间周期短、产品调整数据灵活、效果明显等优点。(The invention discloses a printing process method for distortion adjustment of dial patterns of an automobile instrument, and relates to the technical field of automobile dial printing. The invention is drawn by combining engineering design software, and the process method is characterized in that the equal-spaced grid lines are arranged on the instrument dial pattern, and the pattern deformation is compensated and controlled by printing, forming and adjusting; the invention can simplify the printing process and has the advantages of low cost, short time period, flexible product adjustment data, obvious effect and the like.)

1. The automobile instrument dial pattern distortion adjustment printing process method is characterized by comprising the following steps of: the method comprises the following steps:

s1, drawing equidistant grid lines in engineering drawing software;

s2, converting the film into a flat design software format, and manufacturing a film;

s3, manufacturing a screen printing plate for printing according to the film;

s4, preparing color matching ink;

s5, finishing the screen printing product;

and S6, checking deviation and repeating the silk-screen operation.

2. The method of claim 1, wherein the printing process comprises: the step S1 includes the steps of:

(a) in engineering drawing software AUTOCAD, firstly, determining the position of a region where a dial pattern is deformed;

(b) drawing mesh lines at equal intervals in software, and determining that the mesh lines at the intervals of 1x1mm are more suitable in a range with smaller curvature change through trial production verification for multiple times;

(c) determining a grid line with a spacing of 0.5x0.5mm is more suitable for a range with large curvature change or a region with high adjustment precision;

(d) the thickness of the grid line is 0.15mm, and the method is suitable for the characteristics of a screen printing process.

3. The method of claim 1, wherein the printing process comprises: the step S2 includes the steps of:

(a) converting the DXF format file drawn by drawing software AUTOCAD into an AI format file of the plane design software ILLUSTRATORD;

(b) and in the plane design software, modifying the drawn grid lines, after an ideal effect is achieved, arranging a plurality of cross corner lines around the film, wherein the thickness of the corner lines is 0.2-0.35 mm, and outputting the film.

4. The method of claim 1, wherein the printing process comprises: the step S3 includes the steps of:

(a) repairing films: under a yellow light source of a plate-repairing table, the film is flatly placed on a glass table surface, a red lead pen is used for repairing needle eye light leakage points in the film, and the blackness value of a black area of the film is ensured to meet the exposure requirement;

(b) stretching the net: adopting a 250-300-mesh polyester silk screen, stretching the screen at 90 degrees, and having a central tension of 18-22 newtons, performing aging treatment for 24 hours, then coating Alpha #231 adhesive net glue on the periphery, and filling the periphery of the inner side of the screen frame with edge-repairing glue after completely drying;

(c) and mesh cloth pretreatment: flatly placing the net frame stretched with the net in a water tank, pouring 30-50 g of AUTOTYPE net grinding glue on the net cloth, and applying 20-30N of force to the net cloth by using a brush to perform circular motion so as to achieve the aim of roughening treatment; pouring 30-50 g of UMP degreasing cleaning agent after flushing residual liquid with a high-pressure water gun, polishing the mesh cloth repeatedly to achieve the purpose of degreasing treatment, and flushing residual liquid on the front side and the back side of the mesh cloth with the high-pressure water gun;

(d) and (3) drying: erecting the cleaned screen frame in a low-temperature oven at 25-30 ℃ for drying for 1-2 hours;

(e) preparing a photosensitive emulsion: selecting diazo photosensitive emulsion within a shelf life, adding 100-150 ml of distilled water into a photosensitive agent (5-10 g)/bottle, thoroughly mixing uniformly, pouring into a bucket with 1kg of emulsion, stirring for 15-30 minutes, and standing for 30-60 minutes for use;

(f) coating a photosensitive resist: coating photosensitive glue on two sides of the screen printing plate by using a scraping groove in a dark room, pasting a plate-making film on the reverse side, tightly adhering the medicine film surface with the photosensitive glue without leaving bubbles, and standing in a low-temperature oven at 25-30 ℃ for drying for 2-4 hours;

(g) and exposure and development: selecting an ultraviolet light source of 2-3 kw, wherein the exposure distance is 1000-1200 mm, the exposure index is 350-400, the vacuum degree is less than-90, after exposure, the screen printing plate is washed away by clear water in a developing tank to ensure that the residual photosensitive resist is clear and the pattern is displayed, and then vertically drying in a low-temperature oven for 1-2 hours for later use.

5. The method of claim 1, wherein the printing process comprises: the step S4 includes the steps of: weighing different printing inks according to the color matching proportion, injecting 150-200 g of alpha #224 diluent solvent, placing the mixture into a barrel, manually stirring the mixture for 5-10 minutes, then placing the mixture into a stirrer for stirring for 60 minutes at a speed of more than 2000 rpm, taking the mixture out, and standing the mixture for 30 minutes for use.

6. The method of claim 1, wherein the printing process comprises: the step S5 includes the steps of: resetting the position of an adjusting handle of the semi-automatic printing machine, adjusting the printing position by erecting a net frame, locking the net frame, finely adjusting the printing position, and locking the adjusting handle; mounting and locking a scraper, determining a printing stroke, and pouring ink; and locking the ink returning blade on the frame for printing.

7. The method of claim 1, wherein the printing process comprises: the step S6 includes the steps of: and measuring the deviation of the pattern of the formed product, and adjusting the obtained data to repeat the silk-screen printing process.

Technical Field

The invention relates to the technical field of automobile dial printing, in particular to a method for twisting, adjusting and printing a dial pattern of an automobile instrument.

Background

The IML manufacturing industry has a relatively troublesome technical problem in development and production. That is, after various patterns on the film of the planar screen printing are subjected to various 3D forming processes, especially in a range of large curvature variation, the pattern on the film is greatly distorted and deformed, and sometimes is beyond the same shape. The pattern change has close relation with various factors such as physical indexes of each film, process parameters of various forming modes, even temperature and humidity of working environment and the like, and relates to a plurality of subject fields such as engineering materials science, manufacturing technology and the like.

In the scheme for solving the problem at present abroad, necessary specific data such as performance indexes of materials, forming process parameters and the like are input through computer professional software at the early stage, the deformation of the formed pattern is simulated, and when the design of the plane at the early stage works, the compensation quantity is firstly compensated for by the pattern, and then the development and trial production are carried out. However, in actual development and production, due to the limitation of various unstable factors, the effect is not ideal. Based on the situation, a process method which is simple and convenient and can efficiently solve the problems is sought, and the method becomes the direction of efforts of IML manufacturing personnel.

Disclosure of Invention

The invention aims to provide a method for printing patterns of a dial of an automobile instrument by means of distortion adjustment, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the automobile instrument dial pattern distortion adjustment printing process method comprises the following steps:

s1, drawing equidistant grid lines in engineering drawing software;

s2, converting the film into a flat design software format, and manufacturing a film;

s3, manufacturing a screen printing plate for printing according to the film;

s4, preparing color matching ink;

s5, finishing the screen printing product;

and S6, checking deviation and repeating the silk-screen operation.

Preferably, the step S1 includes the steps of:

(a) in engineering drawing software AUTOCAD, firstly, determining the position of a region where a dial pattern is deformed;

(b) drawing mesh lines at equal intervals in software, and determining that the mesh lines at the intervals of 1x1mm are more suitable in a range with smaller curvature change through trial production verification for multiple times;

(c) determining a grid line with a spacing of 0.5x0.5mm is more suitable for a range with large curvature change or a region with high adjustment precision;

(d) the thickness of the grid line is 0.15mm, and the method is suitable for the characteristics of a screen printing process.

Preferably, the step S2 includes the steps of:

(a) converting the DXF format file drawn by drawing software AUTOCAD into an AI format file of the plane design software ILLUSTRATORD;

(b) and in the plane design software, modifying the drawn grid lines, after an ideal effect is achieved, arranging a plurality of cross corner lines around the film, wherein the thickness of the corner lines is 0.2-0.35 mm, and outputting the film.

Preferably, the step S3 includes the steps of:

(a) repairing films: under a yellow light source of a plate-repairing table, the film is flatly placed on a glass table surface, a red lead pen is used for repairing needle eye light leakage points in the film, and the blackness value of a black area of the film is ensured to meet the exposure requirement;

(b) stretching the net: adopting a 250-300-mesh polyester silk screen, stretching the screen at 90 degrees, and having a central tension of 18-22 newtons, performing aging treatment for 24 hours, then coating Alpha #231 adhesive net glue on the periphery, and filling the periphery of the inner side of the screen frame with edge-repairing glue after completely drying;

(c) and mesh cloth pretreatment: flatly placing the net frame stretched with the net in a water tank, pouring 30-50 g of AUTOTYPE net grinding glue on the net cloth, and applying 20-30N of force to the net cloth by using a brush to perform circular motion so as to achieve the aim of roughening treatment; pouring 30-50 g of UMP degreasing cleaning agent after flushing residual liquid with a high-pressure water gun, polishing the mesh cloth repeatedly to achieve the purpose of degreasing treatment, and flushing residual liquid on the front side and the back side of the mesh cloth with the high-pressure water gun;

(d) and (3) drying: erecting the cleaned screen frame in a low-temperature oven at 25-30 ℃ for drying for 1-2 hours;

(e) preparing a photosensitive emulsion: selecting diazo photosensitive emulsion within a shelf life, adding 100-150 ml of distilled water into a photosensitive agent (5-10 g)/bottle, thoroughly mixing uniformly, pouring into a bucket with 1kg of emulsion, stirring for 15-30 minutes, and standing for 30-60 minutes for use;

(f) coating a photosensitive resist: coating photosensitive glue on two sides of the screen printing plate by using a scraping groove in a dark room, pasting a plate-making film on the reverse side, tightly adhering the medicine film surface with the photosensitive glue without leaving bubbles, and standing in a low-temperature oven at 25-30 ℃ for drying for 2-4 hours;

(g) and exposure and development: selecting an ultraviolet light source of 2-3 kw, wherein the exposure distance is 1000-1200 mm, the exposure index is 350-400, the vacuum degree is less than-90, after exposure, the screen printing plate is washed away by clear water in a developing tank to ensure that the residual photosensitive resist is clear and the pattern is displayed, and then vertically drying in a low-temperature oven for 1-2 hours for later use.

Preferably, the step S4 includes the steps of: weighing different printing inks according to the color matching proportion, injecting 150-200 g of alpha #224 diluent solvent, placing the mixture into a barrel, manually stirring the mixture for 5-10 minutes, then placing the mixture into a stirrer for stirring for 60 minutes at a speed of more than 2000 rpm, taking the mixture out, and standing the mixture for 30 minutes for use.

Preferably, the step S5 includes the steps of: resetting the position of an adjusting handle of the semi-automatic printing machine, adjusting the printing position by erecting a net frame, locking the net frame, finely adjusting the printing position, and locking the adjusting handle; mounting and locking a scraper, determining a printing stroke, and pouring ink; and locking the ink returning blade on the frame for printing.

Preferably, the step S6 includes the steps of: and measuring the deviation of the pattern of the formed product, and adjusting the obtained data to repeat the silk-screen printing process.

Compared with the prior art, the invention has the beneficial effects that:

(1) aiming at the technical problem of deformation after pattern forming, on the premise of relatively stabilizing printing process parameters and forming process parameters, some process grid lines are additionally printed on the basis of patterns required by a plane printing drawing for measuring the deformation amount in the forming process, compensation is carried out on a plane printing film before trial production is carried out again after data is obtained through detection and measurement, and the requirement of controlling the deformation amount of the patterns can be met through 2-3 times of correction of plane printing manuscripts for products with smaller product deformation curvature; even if the product has large curvature change, the grid lines can be adjusted for many times through the process, and the inspection requirements and the technical requirements of the product of customers can be basically met.

(2) The technical method is characterized in that the pattern distortion adjustment printing process method of the automobile instrument dial is drawn by combining engineering design software, and the pattern distortion is compensated and controlled by arranging grid lines at equal intervals on the pattern of the instrument dial and adjusting the pattern after printing and forming; the invention can simplify the printing process and has the advantages of low cost, short time period, flexible product adjustment data, obvious effect and the like.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a schematic diagram illustrating the amount of compensation for distortion of the shape of a symbol during flat printing according to the present invention;

FIG. 3 is a schematic view of a similar process grid for adjusting the distortion of symbol shapes in accordance with the present invention;

FIG. 4 is a schematic view of a product of the present invention after molding and with the symbol shape substantially returning to normal;

fig. 5 is a diagram of the effect of the product of the invention.

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. 1-5, the present invention provides a technical solution: the automobile instrument dial pattern distortion adjustment printing process method comprises the following steps:

s1, drawing equidistant grid lines in engineering drawing software;

s2, converting the film into a flat design software format, and manufacturing a film;

s3, manufacturing a screen printing plate for printing according to the film;

s4, preparing color matching ink;

s5, finishing the screen printing product;

and S6, checking deviation and repeating the silk-screen operation.

Step S1 includes the following steps:

(a) in engineering drawing software AUTOCAD, firstly, determining the position of a region where a dial pattern is deformed;

(b) drawing mesh lines at equal intervals in software, and determining that the mesh lines at the intervals of 1x1mm are more suitable in a range with smaller curvature change through trial production verification for multiple times;

(c) determining a grid line with a spacing of 0.5x0.5mm is more suitable for a range with large curvature change or a region with high adjustment precision;

(d) the thickness of the grid line is 0.15mm, and the method is suitable for the characteristics of a screen printing process.

Step S2 includes the following steps:

(a) converting the DXF format file drawn by drawing software AUTOCAD into an AI format file of the plane design software ILLUSTRATORD;

(b) and in the plane design software, modifying the drawn grid lines, after an ideal effect is achieved, arranging a plurality of cross corner lines around the film, wherein the thickness of the corner lines is 0.2-0.35 mm, and outputting the film.

Step S3 includes the following steps:

(a) repairing films: under a yellow light source of a plate-repairing table, the film is flatly placed on a glass table surface, a red lead pen is used for repairing needle eye light leakage points in the film, and the blackness value of a black area of the film is ensured to meet the exposure requirement;

(b) stretching the net: adopting a 250-300-mesh polyester silk screen, stretching the screen at 90 degrees, and having a central tension of 18-22 newtons, performing aging treatment for 24 hours, then coating Alpha #231 adhesive net glue on the periphery, and filling the periphery of the inner side of the screen frame with edge-repairing glue after completely drying;

(c) and mesh cloth pretreatment: flatly placing the net frame stretched with the net in a water tank, pouring 30-50 g of AUTOTYPE net grinding glue on the net cloth, and applying 20-30N of force to the net cloth by using a brush to perform circular motion so as to achieve the aim of roughening treatment; pouring 30-50 g of UMP degreasing cleaning agent after flushing residual liquid with a high-pressure water gun, polishing the mesh cloth repeatedly to achieve the purpose of degreasing treatment, and flushing residual liquid on the front side and the back side of the mesh cloth with the high-pressure water gun;

(d) and (3) drying: erecting the cleaned screen frame in a low-temperature oven at 25-30 ℃ for drying for 1-2 hours;

(e) preparing a photosensitive emulsion: selecting diazo photosensitive emulsion within a shelf life, adding 100-150 ml of distilled water into a photosensitive agent (5-10 g)/bottle, thoroughly mixing uniformly, pouring into a bucket with 1kg of emulsion, stirring for 15-30 minutes, and standing for 30-60 minutes for use;

(f) coating a photosensitive resist: coating photosensitive glue on two sides of the screen printing plate by using a scraping groove in a dark room, pasting a plate-making film on the reverse side, tightly adhering the medicine film surface with the photosensitive glue without leaving bubbles, and standing in a low-temperature oven at 25-30 ℃ for drying for 2-4 hours;

(g) and exposure and development: selecting an ultraviolet light source of 2-3 kw, wherein the exposure distance is 1000-1200 mm, the exposure index is 350-400, the vacuum degree is less than-90, after exposure, the screen printing plate is washed away by clear water in a developing tank to ensure that the residual photosensitive resist is clear and the pattern is displayed, and then vertically drying in a low-temperature oven for 1-2 hours for later use.

Step S4 includes the following steps: weighing different printing inks according to the color matching proportion, injecting 150-200 g of alpha #224 diluent solvent, placing the mixture into a barrel, manually stirring the mixture for 5-10 minutes, then placing the mixture into a stirrer for stirring for 60 minutes at a speed of more than 2000 rpm, taking the mixture out, and standing the mixture for 30 minutes for use.

Step S5 includes the following steps: resetting the position of an adjusting handle of the semi-automatic printing machine, adjusting the printing position by erecting a net frame, locking the net frame, finely adjusting the printing position, and locking the adjusting handle; mounting and locking a scraper, determining a printing stroke, and pouring ink; and locking the ink returning blade on the frame for printing.

Step S6 includes the following steps: and measuring the deviation of the pattern of the formed product, and adjusting the obtained data to repeat the silk-screen printing process.

The working principle is as follows: the technical method for twisting, adjusting and printing the pattern of the dial of the automobile instrument is drawn by combining engineering design software, and achieves the technical method for compensating and controlling the pattern deformation by arranging grid lines with equal intervals on the pattern of the dial of the automobile instrument and adjusting the pattern after printing and forming; the invention can simplify the printing process and has the advantages of low cost, short time period, flexible product adjustment data, obvious effect and the like; aiming at the technical problem of deformation after pattern forming, on the premise of relatively stabilizing printing process parameters and forming process parameters, some process grid lines are additionally printed on the basis of patterns required by a plane printing drawing for measuring the deformation in the forming process, compensation is carried out on a plane printing film before trial production is carried out again after data is obtained through detection and measurement, and the requirement of controlling the deformation of the patterns can be met by correcting the plane printing manuscript for 2-3 times for products with small product deformation curvature; even if the product has large curvature change, the grid lines can be adjusted for many times through the process, and the inspection requirements and the technical requirements of the product of customers can be basically met.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.