阅读说明：本技术 一种精益网版制作工艺 (Lean screen printing plate manufacturing process ) 是由 邱炳潮 詹有根 詹诚杰 詹红有 潘青 柴水华 刘兴 于 2019-10-25 设计创作，主要内容包括：本发明涉及一种精益网版制作工艺,包括：步骤一,丝网和网框的选择；步骤二,拉网；步骤三,洗网；步骤四,涂胶；将干燥好的待用网放置在涂胶台上,将胶水均匀涂在丝网上,先涂印刷面,后涂油墨面,然后将网干燥；步骤五,曝光；将底片菲林药膜面贴在丝网的印刷面,然后放在真空曝光机内曝光；步骤六,显影；从曝光机取下丝网,去掉底片,先用20～30℃水湿润丝网两面,再用高压水枪彻底冲洗,直至图像显出,然后用吸水布吸干四周多余水分,再将丝网放进30～40℃烘箱中烘干。本发明的精益网版制作工艺制作的网版质量及印刷精度好,拉网张力提高,提升网版印刷过程中的移刷性,拉网效率高,网版不易脱胶。(The invention relates to a lean screen printing plate manufacturing process, which comprises the following steps: step one, selecting a silk screen and a screen frame; step two, pulling a net; step three, washing the net; step four, gluing; placing the dried standby net on a gluing table, uniformly coating glue on a silk screen, firstly coating a printing surface, then coating an ink surface, and then drying the net; step five, exposure; pasting the film surface of the negative film on the printing surface of the silk screen, and then placing the negative film in a vacuum exposure machine for exposure; step six, developing; and taking the silk screen from the exposure machine, removing the negative film, wetting two sides of the silk screen with water of 20-30 ℃, thoroughly washing with a high-pressure water gun until the image is displayed, absorbing the redundant water around with water absorption cloth, and drying the silk screen in an oven of 30-40 ℃. The screen printing plate manufactured by the lean screen printing plate manufacturing process has good quality and printing precision, the screen pulling tension is improved, the brush moving performance in the screen printing plate printing process is improved, the screen pulling efficiency is high, and the screen printing plate is not easy to degum.)

1. A lean screen manufacturing process is characterized by comprising the following steps:

step one, selecting a silk screen and a screen frame; determining classification standards of the silk screen, and selecting a target silk screen and a required screen frame according to the tensile strength, the elongation at break and the resilience of the silk screen;

step two, pulling a net; adopting a net puller to pull the net, changing the net pulling angle, and adopting a diagonal net pulling method;

step three, washing the net; selecting washing powder to wet the screen plate, then polishing the two sides of the screen plate by using cotton cloth, and drying the screen plate in a dryer for later use after the screen is washed;

step four, gluing; placing the dried standby net on a gluing table, uniformly coating glue on a silk screen, firstly coating a printing surface, then coating an ink surface, and then drying the net;

step five, exposure; pasting the film surface of the negative film on the printing surface of the silk screen, and then placing the negative film in a vacuum exposure machine for exposure;

step six, developing; and taking the silk screen from the exposure machine, removing the negative film, wetting two sides of the silk screen with water of 20-30 ℃, thoroughly washing with a high-pressure water gun until the image is displayed, absorbing the redundant water around with water absorption cloth, and drying the silk screen in an oven of 30-40 ℃.

2. The fine screen manufacturing process according to claim 1, wherein the target screen is a monofilament polyester screen, and the color of the target screen is yellow or brown yellow.

3. The manufacturing process of a lean screen printing plate according to claim 1, wherein the screen frame is formed by enclosing a hard alloy aluminum square tube section, and the connection part is welded or riveted by argon arc.

4. A process for manufacturing a lean halftone according to claim 1, wherein in the second step, the halftone is pulled and then the screen is cut along the frame edge.

5. A lean screen process according to claim 4, wherein the diagonal screen drawing method in the second step comprises:

the included angle between the warp threads or the weft threads of the silk screen and the edge of the screen frame is 30-45 degrees, the silk screen is clamped into a screen drawing machine positioned at one corner of the screen frame, then the straightened silk screen is clamped by a screen drawing clamping head at the diagonal position, four corners of the screen frame are fixed in turn, the silk screen is straightened and tightened, the stress is uniform, a screen drawing rotary table is enlarged, and the warp threads and the weft threads of the pulled silk screen are connected with the edge of the screen frame to be vertical.

6. A lean screen printing plate manufacturing process according to claim 1, wherein in the third step, the net pulled before washing the net should be placed for more than 24 hours.

7. A lean screen printing plate manufacturing process according to claim 1, wherein in the fourth step, the screen bonding glue penetrates into the bonding surface holes of the screen to completely bond the screen to the screen frame, and when the screen bonding glue is not completely dry, the glue is scraped to press the bonding of the screen frame so that the screen is completely attached to the screen frame.

8. The process of claim 1, wherein in the fifth step, the exposure time is measured by an exposure ruler before exposure, and then the exposure time of the screen to be manufactured is fixed.

9. The manufacturing process of a lean screen printing plate according to claim 1, wherein in the sixth step, after the screen is dried, whether the manufactured screen printing plate meets the production processing standard is checked; if the answer is yes, sealing the net; if not, repairing or re-manufacturing.

Technical Field

The invention belongs to the technical field of screen printing plate manufacturing, and particularly relates to a lean screen printing plate manufacturing process.

Background

The silk screen printing is that a silk screen is used as a plate base, a silk screen printing plate with pictures and texts is manufactured by a photosensitive plate making method, the basic principle that part of meshes of the pictures and the texts of the silk screen printing plate can penetrate ink and part of meshes of non-pictures and the texts can not penetrate ink is utilized to print, when printing is carried out, ink is poured into one end of the silk screen printing plate, a scraper plate is used for applying certain pressure to ink positions on the silk screen printing plate, meanwhile, the ink moves towards the other end of the silk screen printing plate at a constant speed, the ink is extruded to a printing stock from the meshes of the pictures and the texts by the scraper plate in the moving process, and a screen printing plate needs to be manufactured in the silk screen printing.

Disclosure of Invention

The invention aims to provide a lean screen printing plate manufacturing process to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a lean screen manufacturing process comprises the following steps:

step one, selecting a silk screen and a screen frame; determining classification standards of the silk screen, and selecting a target silk screen and a required screen frame according to the tensile strength, the elongation at break and the resilience of the silk screen;

step two, pulling a net; adopting a net puller to pull the net, changing the net pulling angle, and adopting a diagonal net pulling method;

step three, washing the net; selecting washing powder to wet the screen plate, then polishing the two sides of the screen plate by using cotton cloth, and drying the screen plate in a dryer for later use after the screen is washed;

step four, gluing; placing the dried standby net on a gluing table, uniformly coating glue on a silk screen, firstly coating a printing surface, then coating an ink surface, and then drying the net;

step five, exposure; pasting the film surface of the negative film on the printing surface of the silk screen, and then placing the negative film in a vacuum exposure machine for exposure;

step six, developing; and taking the silk screen from the exposure machine, removing the negative film, wetting two sides of the silk screen with water of 20-30 ℃, thoroughly washing with a high-pressure water gun until the image is displayed, absorbing the redundant water around with water absorption cloth, and drying the silk screen in an oven of 30-40 ℃.

Preferably, the target silk screen is a monofilament polyester silk screen, and the color of the target silk screen is yellow or brownish yellow.

As a preferred scheme, the net frame is formed by enclosing a hard alloy aluminum square tube section, and the connecting part is welded or riveted through argon arc.

Preferably, in the second step, the screen plate is pulled first, and then the screen is cut along the frame edge.

Preferably, the diagonal net pulling method in the second step includes:

the included angle between the warp threads or the weft threads of the silk screen and the edge of the screen frame is 30-45 degrees, the silk screen is clamped into a screen drawing machine positioned at one corner of the screen frame, then the straightened silk screen is clamped by a screen drawing clamping head at the diagonal position, four corners of the screen frame are fixed in turn, the silk screen is straightened and tightened, the stress is uniform, a screen drawing rotary table is enlarged, and the warp threads and the weft threads of the pulled silk screen are connected with the edge of the screen frame to be vertical.

Preferably, in the third step, the net pulled before washing the net should be placed for more than 24 hours.

Preferably, in the fourth step, the screen bonding glue penetrates into the bonding surface holes of the screen to completely bond the screen to the screen frame, and when the screen bonding glue is not completely dried, the glue is scraped and pressed to completely adhere the screen to the screen frame.

Preferably, in the fifth step, the exposure time is measured by an exposure calculating ruler before exposure, and then the exposure time of the manufactured screen is fixed.

As a preferred scheme, in the sixth step, after the silk screen is dried, whether the manufactured screen printing plate meets the production processing standard is checked; if the answer is yes, sealing the net; if not, repairing or re-manufacturing. .

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

1. the method adopts proper silk screen and screen frame materials, ensures the printing precision of the screen printing plate and the tension stability of the screen printing plate, improves the pattern printing precision by changing the screen drawing angle, increases about 30 percent of the screen drawing turntable, improves the screen drawing tension, straightens and tightens the silk screen, has uniform stress and improves the brush moving property in the screen printing process;

2. by firstly pulling the screen printing plate and then cutting the screen along the edge of the screen frame, time and screen meshes are saved, and screen pulling efficiency is improved;

3. before gluing, the screen is wetted by washing powder with strong detergency, then polished by cotton cloth to remove burrs on the surface of the screen, and the screen is completely stuck on the glued screen frame, so that the screen cannot be loosened from the screen frame under large scraping pressure in the screen printing process, and the screen is manufactured through exposure and development, and the quality and printing precision of the screen are good.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a flow chart of the fabrication process of the present 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, the present invention provides a technical solution:

a lean screen manufacturing process comprises the following steps: step one, selecting a silk screen and a screen frame; step two, pulling a net; step three, washing the net; step four, gluing; step five, exposure; step six, developing;

in the first step, the classification standard of the silk screen is known, the tensile strength, the elongation at break and the rebound resilience of the silk screen are mastered, the proper silk screen is selected, the silk screen is reasonably stored, and the screen frame which is small in deformation, light in volume, difficult to rust and convenient to move is selected;

in the second step, a net drawing machine is adopted for drawing a net, the net drawing angle is changed, a diagonal net drawing method is adopted, namely, a silk screen is clamped into the net drawing machine positioned at a certain corner of a net frame at a certain inclination, generally, the included angle between the warp threads or the weft threads of the silk screen and the edge of the net frame is 30-45 degrees, then the straightened silk screen is clamped by a net drawing chuck at the diagonal position, four corners are fixed in such a way, the silk screen is straightened and tightened, the stress is uniform, a net drawing turntable is enlarged, the warp threads and the weft threads of the pulled silk screen are connected with the edge of the net frame as vertical as possible, and the positive wire drawing net is adopted, namely, the force is equal to the wire direction connection; secondly, the silk screen clamped by the screen clamp can move transversely when being stretched, the screen plate becomes loose or looser with use, the tension is generated and falls down along with the time, a continuous screen pulling and repeated screen pulling key tightening needs to be accommodated, the tension loosening is completed before the screen is fixed, and in the second step, the screen plate is pulled firstly, and then the silk screen is cut along the edge of the screen frame;

in the third step, the washing powder with strong detergency is selected to wet the screen plate, then the screen plate is polished by cotton cloth, two sides of the screen plate are polished during polishing, force is needed to be lightened when the opposite sides of the screen plate are polished, so that gauze is prevented from falling off, after the screen is washed, the screen is placed in a dryer to be dried for later use, in the third step, the screen which is well pulled before the screen is washed is placed for at least more than 24 hours to ensure that the stress of each point is equal and deformation is prevented, the screen plate with higher meshes is required to be placed for longer time, generally 2-3 days are preferred, the tension of the screen plate is stable after placement, the stress of the name point is equal, so that the screen plate is not deformed and is not easy;

wherein in the fourth step, the dried standby screen is placed on a glue spreading table, the screen printing plate is placed stably, a proper amount of glue is poured into a scraper, the scraper is used for uniformly spreading the glue on the silk screen, the printing surface is firstly coated, the ink surface is then coated, each side is generally coated for three times, the web is then dried, this being the first time, if a thick screen is required, it can be brushed multiple times, namely, after the first gluing, the silk screen is immediately put into a drying oven at the temperature of 30-40 ℃ for drying, taken out and glued again, determining the number of gluing according to the required thickness, paying attention to the fact that the number of the glue is 2-3 more than that of the ink on the general printing surface, in the fourth step, the glue must be able to penetrate into the holes of the glued surface of the screen to make the screen completely glued on the screen frame, and when necessary, when the screen sticking glue is not completely dried, the screen mesh is helped to be completely and firmly attached to the screen frame after the screen frame is manually scraped and pressed for gluing by using a scraping glue;

in the fifth step, the film surface of the film is pasted on the printing surface of the silk screen and then is put in a vacuum exposure machine for exposure, in the fifth step, the exposure time is measured by an exposure calculating ruler before exposure, and then the exposure time of the manufactured screen is fixed;

and in the sixth step, the silk screen is taken down from the exposure machine, the negative film is removed, the two surfaces of the silk screen are wetted by warm cold water with the temperature of 20-30 ℃, after about 30-60 seconds of wetting, the silk screen is thoroughly washed by a high-pressure water gun until the image is displayed, the water absorption cloth is used for absorbing the redundant water around the silk screen, the silk screen is put into a drying oven with the temperature of 30-40 ℃ for drying, and in the sixth step, after the silk screen is dried, whether the manufactured screen plate meets the production and processing requirements is carefully checked, if the screen plate meets the standard, the screen sealing work is immediately carried out, so that production personnel can use the screen plate for use, and if.

Based on the above, the invention has the advantages that the invention adopts proper silk screen and screen frame materials to ensure the printing precision of the screen printing plate and the stable tension of the screen printing plate, by changing the screen drawing angle, the pattern printing precision is improved, the screen drawing rotary table is enlarged by about 30 percent, the screen drawing tension is improved, the silk screen is straightened and tightened, the stress is uniform, the brush moving performance in the screen printing process is improved, by firstly pulling the screen printing plate and then cutting the screen along the edge of the screen frame, the time is saved, the silk screen is saved, the screen pulling efficiency is improved, the screen is wetted by washing powder with strong detergency before gluing, then polished by cotton cloth, burrs on the surface of the silk screen are removed, the silk screen is completely stuck on the glued screen frame, the screen printing plate is ensured to be in the screen printing process, the screen cloth can not loosen from the screen frame under the large scraping pressure, the manufacture of the screen printing plate is completed through exposure and development, and the quality and the printing precision of the screen printing plate are good.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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.