阅读说明：本技术 一种快速丝网印刷工艺 (Rapid silk-screen printing process ) 是由 龚俊华 于 2021-06-24 设计创作，主要内容包括：本发明公开了一种快速丝网印刷工艺,主要包括丝网网版的制作、丝网网版的安装、印刷板件的安装、刮墨刀和回墨刀的设置安装、设备测试微调、调制油墨、正式印刷等共计十个步骤。本发明中感光胶的稳定性好,贮存时间长,成膜强度大,耐印率高,制版精度、分辨率高；油性清洁剂的去胶效果好,使用方便,无需额外增加擦拭力度,保护了丝网印版的图案；通过合理的设计,充分利用丝网网版的表面区域,通过设计好的部件,简化印制中多余的对位和调整动作,提高印制效率；印制到承印件的油墨不易缺失、掉落,更加耐用。(The invention discloses a quick silk-screen printing process which mainly comprises ten steps of manufacturing a silk-screen printing plate, installing the silk-screen printing plate, installing a printing plate, arranging and installing a doctor blade and a return blade, testing and fine-adjusting equipment, modulating ink, formally printing and the like. The photosensitive emulsion has good stability, long storage time, high film forming strength, high printing resistance, high plate making precision and high resolution; the oily cleaning agent has good photoresist removing effect and convenient use, does not need to additionally increase wiping force, and protects the patterns of the screen printing plate; through reasonable design, the surface area of the screen printing plate is fully utilized, and through designed components, redundant alignment and adjustment actions in printing are simplified, and the printing efficiency is improved; the printing ink printed on the printing piece is not easy to lose and drop, and is more durable.)

1. A rapid silk-screen printing process is characterized in that: the process comprises the following steps:

s1, preparing a photosensitive adhesive and an oily cleaning agent, and manufacturing a screen printing plate;

s2, mounting the screen printing plate into fixed sockets at two ends of the workbench, and fixing the positions;

s3, directly installing the printed printing plate into a groove table in the center of the workbench;

s4, mounting a doctor blade and a return blade on a cylinder assembly matched with the workbench, wherein the deviation of the doctor blade and the return blade is opposite and a gap is reserved between the doctor blade and the return blade;

s5, testing equipment, and carrying out fine adjustment;

s6, preparing ink;

s7, pouring the prepared ink into a printing plate groove of a screen printing plate, and uniformly coating the ink on a printing area;

s8, performing ink scraping printing formally, returning ink, and finishing the printing of the current plate;

s9, conducting ink scraping and ink returning actions on the subsequent plates in sequence until the printing is finished;

and S10, cleaning the screen printing plate, and returning the equipment to the initial state.

2. The rapid screen printing process according to claim 1, characterized in that: the preparation method of the photosensitive adhesive in the step S1 comprises the following steps:

taking 120-125 parts by weight of nitric acid fiber film forming agent, and mixing the components in a proportion of 1: 4, adding water for dilution, heating to 75 ℃, stirring for at least 20min, adding 15-20 parts by weight of divinylbenzene and 50-60 parts by weight of dialkoxy acetophenone, continuing stirring for 10min, and adding 5-6 parts by weight of vinyl dimethylethoxysilane under stirring to obtain a photosensitive colloid stock solution;

and adding 13-15 parts by weight of polyvinylpyrrolidone, 4-6 parts by weight of tetrabutyl titanate and 70-80 parts by weight of chlorinated acetophenone into the photosensitive glue stock solution, performing ultrasonic oscillation, and standing at room temperature for 1-2 hours to obtain the final photosensitive glue.

3. The rapid screen printing process according to claim 1, characterized in that: the preparation method of the oily cleaning agent in the step S1 comprises the following steps:

mixing 20-30 parts by weight of copper-silver corrosion inhibitor benzotriazole, 5-6 parts by weight of clove oil, 10-12 parts by weight of oleic acid and 7-8 parts by weight of paraffin, then carrying out ball milling, adding 25-28 parts by weight of sorbitan monooleate, stirring and precipitating, and removing the upper-layer precipitation liquid to obtain the final oily cleaning agent.

4. The rapid screen printing process according to claim 1, characterized in that: the method for manufacturing the screen printing plate in the step S1 comprises the following steps:

drawing patterns on the silk-screen gauze in a hand-drawing or pasting printing mode;

embedding a frame around the silk-screen gauze with the pattern, so that the silk-screen gauze is divided into a printing surface and an ink surface, and the ink surface and the frame are of a sunken structure;

coating photosensitive glue on the framed silk screen printing screen, and then placing the silk screen printing screen in the sun for photosensitive and airing;

and wiping the wiping cloth soaked with the oily cleaning agent along the lines of the pattern, and wiping off the photosensitive resist on the surface of the pattern to obtain the silk screen printing plate for printing.

5. The rapid screen printing process according to claim 1, characterized in that: the method for mounting the screen plate in the step S2 is as follows:

the fixed sockets at two ends are only provided with a socket at the front end, a slot is arranged in the fixed sockets, and the top surface of the socket and the surface of the fixed socket at the opposite side are provided with seals;

the screen printing plate is inserted along the insertion ports and the insertion slots at the two ends and then is abutted to the end part at the rear end, so that the screen printing plate cannot move up and down, left and right;

vertically inserting a seal into the fixed sockets at the two ends along the seal, so that the screen printing plate cannot move forwards and backwards;

finally, the screen printing plate is completely fixed between the fixed sockets at the two ends.

6. The rapid screen printing process according to claim 1, characterized in that: the groove table in the step S3 and the screen printing plate in the step S1 have a set of matched specification standards;

the fixed slot has been seted up at the elevating platform center that recess platform is actual for sunken elevating platform, the degree of depth of fixed slot is less than printing plate's thickness, and printing plate can follow one side and install to the fixed slot, takes out from the opposite side:

when the lifting platform is lifted to the highest position, the surface of the lifting platform is lower than the surface of the workbench, and the surface of the printing plate piece is higher than the surface of the workbench;

a special horizontal slot is formed in the workbench, the horizontal slot penetrates through one side of the workbench, a cavity is formed in the other side of the workbench, and the cavity, the workbench and the horizontal slot are communicated;

when the lifting platform descends to the lowest position, the lifting platform is aligned with the horizontal slot, the printing plate can be inserted into the horizontal slot from one side, is installed in the fixed slot, and ascends along with the groove platform to be printed; after printing is completed, the groove table descends, and the printing plate can be taken out from the other side.

7. The rapid screen printing process according to claim 1, characterized in that: in step S4, the ink scraping blade and the ink returning blade are installed in a rectangular groove at the end of the starting assembly and fixed through a fastener, the ink scraping blade is arranged in a mode of deviating from the ink returning blade, and the gap between the ink scraping blade and the ink returning blade is not smaller than 3 cm.

8. The rapid screen printing process according to claim 1, characterized in that: the preparation method of the ink in the step S6 is as follows: according to the color design of the pattern, taking related single-color printing ink, and adding the printing ink into a material cup for blending;

then, according to the following steps of 1: 10, adding water for dilution, and fully stirring;

and finally, adding polyvinyl chloride resin under the stirring state, and continuously stirring for 30min to obtain the final printing ink.

9. The rapid screen printing process according to claim 1, characterized in that: in step S7, by installing the test plate, the doctor blade and the ink return blade perform a single doctor and return action to achieve uniform application of ink.

10. The rapid screen printing process according to claim 1, characterized in that: after the step S8 is completed, the printed board needs to be checked and accepted to ensure that the pattern is printed normally.

Technical Field

The invention relates to the technical field of screen printing, in particular to a rapid screen printing process.

Background

The silk screen printing refers to that a silk screen is used as a plate base, and a silk screen printing plate with pictures and texts is manufactured by a photosensitive plate making method. The screen printing is composed of five major elements, namely a screen printing plate, a scraper, ink, a printing table and a printing stock. The basic principle that the meshes of the image-text part and the non-image-text part of the screen printing plate are permeable to ink and impermeable to ink is utilized to print. When printing, ink is poured into one end of the screen printing plate, a scraper plate is used for applying a certain pressure to the ink position on the screen printing plate, meanwhile, the scraper plate moves towards the other end of the screen printing plate at a constant speed, and the ink is extruded onto a printing stock from meshes of the image-text part by the scraper plate in the moving process.

However, the position of the clamping seat needs to be manually adjusted, the screen printing plate is clamped on the clamping seat, the printing position of the printing stock needs to be debugged, the boundary for uniformly placing the printing stock is determined by tape pasting or other modes, then the printing stock can be placed on the clamping seat for printing, and the counterpoint is needed every time, so that the method is very complicated; for printing of plates, because the pattern design area is limited and the size of the workbench is limited, although screen printing plates with different sizes can be adapted in a manner of adjusting the clamping seat, the screen printing plates are provided with areas irrelevant to printing, and the functions are luxurious and unrealistic; the quality of photosensitive glue and oily cleaning agent of the screen printing plate can influence the subsequent printing, the screen printing plate needs to be firmly closed, and the printing ink printed on a printing piece is easy to drop and lose in use.

Disclosure of Invention

In view of the shortcomings of the prior art, it is an object of the present invention to provide a rapid screen printing process that solves one or more of the above problems.

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

a quick silk-screen printing process comprises the following steps:

s1, preparing a photosensitive adhesive and an oily cleaning agent, and manufacturing a screen printing plate;

s2, mounting the screen printing plate into fixed sockets at two ends of the workbench, and fixing the positions;

s3, directly installing the printed printing plate into a groove table in the center of the workbench;

s4, mounting a doctor blade and a return blade on a cylinder assembly matched with the workbench, wherein the deviation of the doctor blade and the return blade is opposite and a gap is reserved between the doctor blade and the return blade;

s5, testing equipment, and carrying out fine adjustment;

s6, preparing ink;

s7, pouring the prepared ink into a printing plate groove of a screen printing plate, and uniformly coating the ink on a printing area;

s8, performing ink scraping printing formally, returning ink, and finishing the printing of the current plate;

s9, conducting ink scraping and ink returning actions on the subsequent plates in sequence until the printing is finished;

and S10, cleaning the screen printing plate, and returning the equipment to the initial state.

Further, the preparation method of the photoresist in step S1 is:

taking 120-125 parts by weight of nitric acid fiber film forming agent, and mixing the components in a proportion of 1: 4, adding water for dilution, heating to 75 ℃, stirring for at least 20min, adding 15-20 parts by weight of divinylbenzene and 50-60 parts by weight of dialkoxy acetophenone, continuing stirring for 10min, and adding 5-6 parts by weight of vinyl dimethylethoxysilane under stirring to obtain a photosensitive colloid stock solution;

and adding 13-15 parts by weight of polyvinylpyrrolidone, 4-6 parts by weight of tetrabutyl titanate and 70-80 parts by weight of chlorinated acetophenone into the photosensitive glue stock solution, performing ultrasonic oscillation, and standing at room temperature for 1-2 hours to obtain the final photosensitive glue.

Further, the preparation method of the oily cleaning agent in the step S1 is as follows:

mixing 20-30 parts by weight of copper-silver corrosion inhibitor benzotriazole, 5-6 parts by weight of clove oil, 10-12 parts by weight of oleic acid and 7-8 parts by weight of paraffin, then carrying out ball milling, adding 25-28 parts by weight of sorbitan monooleate, stirring and precipitating, and removing the upper-layer precipitation liquid to obtain the final oily cleaning agent.

Further, the method for manufacturing the screen printing plate in step S1 includes:

drawing patterns on the silk-screen gauze in a hand-drawing or pasting printing mode;

embedding a frame around the silk-screen gauze with the pattern, so that the silk-screen gauze is divided into a printing surface and an ink surface, and the ink surface and the frame are of a sunken structure;

coating photosensitive glue on the framed silk screen printing screen, and then placing the silk screen printing screen in the sun for photosensitive and airing;

and wiping the wiping cloth soaked with the oily cleaning agent along the lines of the pattern, and wiping off the photosensitive resist on the surface of the pattern to obtain the silk screen printing plate for printing.

Further, the method of mounting the screen plate in step S2 is:

the fixed sockets at two ends are only provided with a socket at the front end, a slot is arranged in the fixed sockets, and the top surface of the socket and the surface of the fixed socket at the opposite side are provided with seals;

the screen printing plate is inserted along the insertion ports and the insertion slots at the two ends and then is abutted to the end part at the rear end, so that the screen printing plate cannot move up and down, left and right;

vertically inserting a seal into the fixed sockets at the two ends along the seal, so that the screen printing plate cannot move forwards and backwards;

finally, the screen printing plate is completely fixed between the fixed sockets at the two ends.

Further, the groove table in the step S3 and the screen plate in the step S1 have a set of matched specification standards;

the fixed slot has been seted up at the elevating platform center that recess platform is actual for sunken elevating platform, the degree of depth of fixed slot is less than printing plate's thickness, and printing plate can follow one side and install to the fixed slot, takes out from the opposite side:

when the lifting platform is lifted to the highest position, the surface of the lifting platform is lower than the surface of the workbench, and the surface of the printing plate piece is higher than the surface of the workbench;

a special horizontal slot is formed in the workbench, the horizontal slot penetrates through one side of the workbench, a cavity is formed in the other side of the workbench, and the cavity, the workbench and the horizontal slot are communicated;

when the lifting platform descends to the lowest position, the lifting platform is aligned with the horizontal slot, the printing plate can be inserted into the horizontal slot from one side, is installed in the fixed slot, and ascends along with the groove platform to be printed; after printing is completed, the groove table descends, and the printing plate can be taken out from the other side.

Further, in step S4, the doctor blade and the ink return blade are mounted in the rectangular groove at the end of the actuating assembly and fixed by the fastener, the doctor blade is set to be biased to the ink return blade, and the gap between the doctor blade and the ink return blade is not less than 3 cm.

Further, the preparation method of the ink in the step S6 is: according to the color design of the pattern, taking related single-color printing ink, and adding the printing ink into a material cup for blending;

then, according to the following steps of 1: 10, adding water for dilution, and fully stirring;

and finally, adding polyvinyl chloride resin under the stirring state, and continuously stirring for 30min to obtain the final printing ink.

Further, in step S7, by mounting the test plate, the doctor blade and the ink return blade perform a single doctor and ink return action to achieve uniform application of ink.

Further, after step S8 is completed, the printed board needs to be checked to ensure that the pattern is printed normally.

In conclusion, the invention has the following beneficial effects:

1. the photosensitive emulsion has good stability, long storage time, high film forming strength, high printing resistance, high plate making precision and high resolution;

2. the oily cleaning agent has good photoresist removing effect and convenient use, does not need to additionally increase wiping force, and protects the patterns of the screen printing plate;

3. through reasonable design, the surface area of the screen printing plate is fully utilized, and through designed components, redundant alignment and adjustment actions in printing are simplified, and the printing efficiency is improved;

4. the printing ink printed on the printing piece is not easy to lose and drop, and is more durable.

Drawings

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

Detailed Description

Example 1:

a quick silk-screen printing process comprises the following steps:

s1, preparing a photosensitive adhesive and an oily cleaning agent, and manufacturing a screen printing plate;

s2, mounting the screen printing plate into fixed sockets at two ends of the workbench, and fixing the positions;

s3, directly installing the printed printing plate into a groove table in the center of the workbench;

s4, mounting a doctor blade and a return blade on a cylinder assembly matched with the workbench, wherein the deviation of the doctor blade and the return blade is opposite, the doctor blade is arranged leftwards, the return blade is arranged rightwards, and a gap is reserved between the doctor blade and the return blade;

s5, testing equipment, and carrying out fine adjustment;

s6, preparing ink;

s7, pouring the prepared ink into a printing plate groove of a screen printing plate, and uniformly coating the ink on a printing area;

s8, main printing:

the ink scraping knife descends to be close to the printing plate for ink scraping printing, after printing is finished, the ink scraping knife ascends, the ink returning knife descends to be close to the printing plate for ink returning, and printing of the current plate is finished;

s9, conducting ink scraping and ink returning actions on the subsequent plates in sequence until the printing is finished;

and S10, cleaning the screen printing plate, and returning the equipment to the initial state.

The preparation method of the photosensitive adhesive in the step S1 comprises the following steps:

taking 120 parts by weight of nitrocellulose film forming agent, and mixing the components in a ratio of 1: 4, adding water for dilution, heating to 75 ℃, stirring for at least 20min, adding 15 parts by weight of divinylbenzene and 50 parts by weight of dialkoxy acetophenone, continuing stirring for 10min, and adding 5 parts by weight of vinyl dimethylethoxysilane under stirring to obtain a photosensitive colloid stock solution;

and adding 13 parts by weight of polyvinylpyrrolidone, 4 parts by weight of tetrabutyl titanate and 70 parts by weight of chlorinated acetophenone into the photosensitive emulsion stock solution, performing ultrasonic oscillation, and standing at room temperature for 1 hour to obtain the final photosensitive emulsion.

The preparation method of the oily cleaning agent in the step S1 comprises the following steps:

mixing 20 parts by weight of copper-silver corrosion inhibitor benzotriazole, 5 parts by weight of clove oil, 10 parts by weight of oleic acid and 7 parts by weight of paraffin, then carrying out ball milling, adding 25 parts by weight of sorbitan monooleate, stirring and precipitating, and removing the upper-layer precipitation liquid to obtain the final oily cleaning agent.

The method for manufacturing the screen printing plate in the step S1 comprises the following steps:

drawing patterns on the silk-screen gauze in a hand-drawing or pasting printing mode;

embedding a frame around the silk-screen gauze with the pattern, so that the silk-screen gauze is divided into a printing surface and an ink surface, and the ink surface and the frame are of a sunken structure;

coating photosensitive glue on the framed silk screen printing screen, and then placing the silk screen printing screen in the sun for photosensitive and airing;

and wiping the wiping cloth soaked with the oily cleaning agent along the lines of the pattern, and wiping off the photosensitive resist on the surface of the pattern to obtain the silk screen printing plate for printing.

The method for mounting the screen plate in the step S2 is as follows:

the fixed sockets at two ends are only provided with a socket at the front end, a slot is arranged in the fixed sockets, and the top surface of the socket and the surface of the fixed socket at the opposite side are provided with seals;

the screen printing plate is inserted along the insertion ports and the insertion slots at the two ends and then is abutted to the end part at the rear end, so that the screen printing plate cannot move up and down, left and right;

vertically inserting a seal into the fixed sockets at the two ends along the seal, so that the screen printing plate cannot move forwards and backwards;

finally, the screen printing plate is completely fixed between the fixed sockets at the two ends.

The groove table in the step S3 and the screen printing plate in the step S1 have a set of matched specification standards;

the fixed slot has been seted up at the elevating platform center that recess platform is actual for sunken elevating platform, the degree of depth of fixed slot is less than printing plate's thickness, and printing plate can follow one side and install to the fixed slot, takes out from the opposite side:

when the lifting platform is lifted to the highest position, the surface of the lifting platform is lower than the surface of the workbench, and the surface of the printing plate piece is higher than the surface of the workbench;

a special horizontal slot is formed in the workbench, the horizontal slot penetrates through one side of the workbench, a cavity is formed in the other side of the workbench, and the cavity, the workbench and the horizontal slot are communicated;

when the lifting platform descends to the lowest position, the lifting platform is aligned with the horizontal slot, the printing plate can be inserted into the horizontal slot from one side, is installed in the fixed slot, and ascends along with the groove platform to be printed; after printing is completed, the groove table descends, and the printing plate can be taken out from the other side.

In step S4, the ink scraping blade and the ink returning blade are installed in a rectangular groove at the end of the starting assembly and fixed through a fastener, the ink scraping blade is arranged in a mode of deviating from the ink returning blade, and the gap between the ink scraping blade and the ink returning blade is not smaller than 3 cm.

The preparation method of the ink in the step S6 is as follows: according to the color design of the pattern, taking related single-color printing ink, and adding the printing ink into a material cup for blending;

then, according to the following steps of 1: 10, adding water for dilution, and fully stirring;

and finally, adding polyvinyl chloride resin under the stirring state, and continuously stirring for 30min to obtain the final printing ink.

In step S7, by installing the test plate, the doctor blade and the ink return blade perform a single doctor and return action to achieve uniform application of ink.

After the step S8 is completed, the printed board needs to be checked and accepted to ensure that the pattern is printed normally.

Example 2

A quick silk-screen printing process comprises the following steps:

s1, preparing a photosensitive adhesive and an oily cleaning agent, and manufacturing a screen printing plate;

s2, mounting the screen printing plate into fixed sockets at two ends of the workbench, and fixing the positions;

s3, directly installing the printed printing plate into a groove table in the center of the workbench;

s4, mounting a doctor blade and a return blade on a cylinder assembly matched with the workbench, wherein the deviation of the doctor blade and the return blade is opposite, the doctor blade is arranged leftwards, the return blade is arranged rightwards, and a gap is reserved between the doctor blade and the return blade;

s5, testing equipment, and carrying out fine adjustment;

s6, preparing ink;

s7, pouring the prepared ink into a printing plate groove of a screen printing plate, and uniformly coating the ink on a printing area;

s8, main printing:

the ink scraping knife descends to be close to the printing plate for ink scraping printing, after printing is finished, the ink scraping knife ascends, the ink returning knife descends to be close to the printing plate for ink returning, and printing of the current plate is finished;

s9, conducting ink scraping and ink returning actions on the subsequent plates in sequence until the printing is finished;

and S10, cleaning the screen printing plate, and returning the equipment to the initial state.

The preparation method of the photosensitive adhesive in the step S1 comprises the following steps:

taking 125 parts by weight of nitrocellulose film forming agent, and mixing the raw materials in a proportion of 1: 4, adding water for dilution, heating to 75 ℃, stirring for at least 20min, adding 20 parts by weight of divinylbenzene and 60 parts by weight of dialkoxy acetophenone, continuing stirring for 10min, and adding 6 parts by weight of vinyl dimethylethoxysilane under stirring to obtain a photosensitive colloid stock solution;

and adding 15 parts by weight of polyvinylpyrrolidone, 6 parts by weight of tetrabutyl titanate and 80 parts by weight of chlorinated acetophenone into the photosensitive emulsion stock solution, performing ultrasonic oscillation, and standing at room temperature for 1h to obtain the final photosensitive emulsion.

The preparation method of the oily cleaning agent in the step S1 comprises the following steps:

mixing 30 parts by weight of copper-silver corrosion inhibitor benzotriazole, 6 parts by weight of clove oil, 12 parts by weight of oleic acid and 8 parts by weight of paraffin, then carrying out ball milling, adding 28 parts by weight of sorbitan monooleate, stirring and precipitating, and removing the upper-layer precipitated liquid to obtain the final oily cleaning agent.

The method for manufacturing the screen printing plate in the step S1 comprises the following steps:

drawing patterns on the silk-screen gauze in a hand-drawing or pasting printing mode;

embedding a frame around the silk-screen gauze with the pattern, so that the silk-screen gauze is divided into a printing surface and an ink surface, and the ink surface and the frame are of a sunken structure;

coating photosensitive glue on the framed silk screen printing screen, and then placing the silk screen printing screen in the sun for photosensitive and airing;

and wiping the wiping cloth soaked with the oily cleaning agent along the lines of the pattern, and wiping off the photosensitive resist on the surface of the pattern to obtain the silk screen printing plate for printing.

The method for mounting the screen plate in the step S2 is as follows:

the fixed sockets at two ends are only provided with a socket at the front end, a slot is arranged in the fixed sockets, and the top surface of the socket and the surface of the fixed socket at the opposite side are provided with seals;

the screen printing plate is inserted along the insertion ports and the insertion slots at the two ends and then is abutted to the end part at the rear end, so that the screen printing plate cannot move up and down, left and right;

vertically inserting a seal into the fixed sockets at the two ends along the seal, so that the screen printing plate cannot move forwards and backwards;

finally, the screen printing plate is completely fixed between the fixed sockets at the two ends.

The groove table in the step S3 and the screen printing plate in the step S1 have a set of matched specification standards;

the fixed slot has been seted up at the elevating platform center that recess platform is actual for sunken elevating platform, the degree of depth of fixed slot is less than printing plate's thickness, and printing plate can follow one side and install to the fixed slot, takes out from the opposite side:

when the lifting platform is lifted to the highest position, the surface of the lifting platform is lower than the surface of the workbench, and the surface of the printing plate piece is higher than the surface of the workbench;

a special horizontal slot is formed in the workbench, the horizontal slot penetrates through one side of the workbench, a cavity is formed in the other side of the workbench, and the cavity, the workbench and the horizontal slot are communicated;

when the lifting platform descends to the lowest position, the lifting platform is aligned with the horizontal slot, the printing plate can be inserted into the horizontal slot from one side, is installed in the fixed slot, and ascends along with the groove platform to be printed; after printing is completed, the groove table descends, and the printing plate can be taken out from the other side.

In step S4, the ink scraping blade and the ink returning blade are installed in a rectangular groove at the end of the starting assembly and fixed through a fastener, the ink scraping blade is arranged in a mode of deviating from the ink returning blade, and the gap between the ink scraping blade and the ink returning blade is not smaller than 3 cm.

The preparation method of the ink in the step S6 is as follows: according to the color design of the pattern, taking related single-color printing ink, and adding the printing ink into a material cup for blending;

then, according to the following steps of 1: 10, adding water for dilution, and fully stirring;

and finally, adding polyvinyl chloride resin under the stirring state, and continuously stirring for 30min to obtain the final printing ink.

In step S7, by installing the test plate, the doctor blade and the ink return blade perform a single doctor and return action to achieve uniform application of ink.

After the step S8 is completed, the printed board needs to be checked and accepted to ensure that the pattern is printed normally.

Example 3

A quick silk-screen printing process comprises the following steps:

s1, preparing a photosensitive adhesive and an oily cleaning agent, and manufacturing a screen printing plate;

s2, mounting the screen printing plate into fixed sockets at two ends of the workbench, and fixing the positions;

s3, directly installing the printed printing plate into a groove table in the center of the workbench;

s4, mounting a doctor blade and a return blade on a cylinder assembly matched with the workbench, wherein the deviation of the doctor blade and the return blade is opposite, the doctor blade is arranged leftwards, the return blade is arranged rightwards, and a gap is reserved between the doctor blade and the return blade;

s5, testing equipment, and carrying out fine adjustment;

s6, preparing ink;

s7, pouring the prepared ink into a printing plate groove of a screen printing plate, and uniformly coating the ink on a printing area;

s8, main printing:

the ink scraping knife descends to be close to the printing plate for ink scraping printing, after printing is finished, the ink scraping knife ascends, the ink returning knife descends to be close to the printing plate for ink returning, and printing of the current plate is finished;

s9, conducting ink scraping and ink returning actions on the subsequent plates in sequence until the printing is finished;

and S10, cleaning the screen printing plate, and returning the equipment to the initial state.

The preparation method of the photosensitive adhesive in the step S1 comprises the following steps:

taking 123 parts by weight of nitrocellulose film forming agent, and mixing the components in a ratio of 1: 4, adding water for dilution, heating to 75 ℃, stirring for at least 20min, adding 17 parts by weight of divinylbenzene and 55 parts by weight of dialkoxy acetophenone, continuing stirring for 10min, and adding 5.5 parts by weight of vinyl dimethylethoxysilane under stirring to obtain a photosensitive colloid stock solution;

and adding 14 parts by weight of polyvinylpyrrolidone, 5 parts by weight of tetrabutyl titanate and 75 parts by weight of chlorinated acetophenone into the photosensitive emulsion stock solution, performing ultrasonic oscillation, and standing at room temperature for 1 hour to obtain the final photosensitive emulsion.

The preparation method of the oily cleaning agent in the step S1 comprises the following steps:

mixing 25 parts by weight of copper-silver corrosion inhibitor benzotriazole, 5.5 parts by weight of clove oil, 11 parts by weight of oleic acid and 7.5 parts by weight of paraffin, then carrying out ball milling, adding 27 parts by weight of sorbitan monooleate, stirring and precipitating, and removing the upper-layer precipitation liquid to obtain the final oily cleaning agent.

The method for manufacturing the screen printing plate in the step S1 comprises the following steps:

drawing patterns on the silk-screen gauze in a hand-drawing or pasting printing mode;

embedding a frame around the silk-screen gauze with the pattern, so that the silk-screen gauze is divided into a printing surface and an ink surface, and the ink surface and the frame are of a sunken structure;

coating photosensitive glue on the framed silk screen printing screen, and then placing the silk screen printing screen in the sun for photosensitive and airing;

and wiping the wiping cloth soaked with the oily cleaning agent along the lines of the pattern, and wiping off the photosensitive resist on the surface of the pattern to obtain the silk screen printing plate for printing.

The method for mounting the screen plate in the step S2 is as follows:

the fixed sockets at two ends are only provided with a socket at the front end, a slot is arranged in the fixed sockets, and the top surface of the socket and the surface of the fixed socket at the opposite side are provided with seals;

the screen printing plate is inserted along the insertion ports and the insertion slots at the two ends and then is abutted to the end part at the rear end, so that the screen printing plate cannot move up and down, left and right;

vertically inserting a seal into the fixed sockets at the two ends along the seal, so that the screen printing plate cannot move forwards and backwards;

finally, the screen printing plate is completely fixed between the fixed sockets at the two ends.

The groove table in the step S3 and the screen printing plate in the step S1 have a set of matched specification standards;

the fixed slot has been seted up at the elevating platform center that recess platform is actual for sunken elevating platform, the degree of depth of fixed slot is less than printing plate's thickness, and printing plate can follow one side and install to the fixed slot, takes out from the opposite side:

when the lifting platform is lifted to the highest position, the surface of the lifting platform is lower than the surface of the workbench, and the surface of the printing plate piece is higher than the surface of the workbench;

a special horizontal slot is formed in the workbench, the horizontal slot penetrates through one side of the workbench, a cavity is formed in the other side of the workbench, and the cavity, the workbench and the horizontal slot are communicated;

when the lifting platform descends to the lowest position, the lifting platform is aligned with the horizontal slot, the printing plate can be inserted into the horizontal slot from one side, is installed in the fixed slot, and ascends along with the groove platform to be printed; after printing is completed, the groove table descends, and the printing plate can be taken out from the other side.

In step S4, the ink scraping blade and the ink returning blade are installed in a rectangular groove at the end of the starting assembly and fixed through a fastener, the ink scraping blade is arranged in a mode of deviating from the ink returning blade, and the gap between the ink scraping blade and the ink returning blade is not smaller than 3 cm.

The preparation method of the ink in the step S6 is as follows: according to the color design of the pattern, taking related single-color printing ink, and adding the printing ink into a material cup for blending;

then, according to the following steps of 1: 10, adding water for dilution, and fully stirring;

and finally, adding polyvinyl chloride resin under the stirring state, and continuously stirring for 30min to obtain the final printing ink.

In step S7, by installing the test plate, the doctor blade and the ink return blade perform a single doctor and return action to achieve uniform application of ink.

After the step S8 is completed, the printed board needs to be checked and accepted to ensure that the pattern is printed normally.

Coating the photosensitive resist in the embodiment 1-3 on the surface of a printed piece with the same specification and size, repeatedly rolling and rubbing by using a roller, observing the film forming condition, and summarizing the film forming strength;

coating the photosensitive resist in the embodiments 1 to 3 on a printing piece with the same specification and size, testing whether a printed image is clear and complete after printing for 100, 500 and 1000 times, and summarizing the printing resistance;

coating the photosensitive resist in the embodiment 1-3 on the surface of a printed piece with the same specification and size for comparison, and summarizing the definition and the precision of plate making;

the photoresists of examples 1 to 3 were left open and used for 7 days, 15 days and 30 days, and the storage properties were judged by observing the basic properties such as film formation.

The four cases were subjected to separate experiments and summarized in the following table:

	film formation Strength	Printing durability	Definition of plate making	Precision of plate making	Storage Properties
						Example 1	Is preferably used	Is preferably used	Is preferably used	Is preferably used	It is preferable that
Example 2	Is preferably used	It is preferable that	Is preferably used	Is preferably used	Is preferably used
						Example 3	It is preferable that	Is preferably used	It is preferable that	It is preferable that	Is preferably used

TABLE 1

As can be seen from Table 1, the photoresist of example 3 has the best overall properties.

The oily cleaning agent in the examples 1 to 3 is wiped off the same target oil agent, the test is carried out for a plurality of times, the condition is observed, the force for wiping clean, the time length required for wiping with the same force and the condition of wiping residue are recorded, and the summary is as follows:

	force for wiping	The time length required for wiping with the same force	Wiping residue
				Example 1	Is less	Is shorter	No obvious residue
Example 2	Maximum of	Is shorter	No obvious residue
				Example 3	Is less	Shortest length	No obvious residue

TABLE 2

As is clear from Table 2, the oily cleansing agent of example 3 was the most labor-saving, the fastest wiping time, and had no significant residue.

Polyvinyl chloride resin is additionally added to the printing inks of the embodiments 1 to 3, the printing inks and common printing inks are tested, the printing inks are coated on the same object and placed in the same environment, the durability is tested, in order to shorten the testing time, the temperature and the air speed of an experimental space are adjusted, finally, the printing inks are shaken with the same force, the adhesion condition of the printing inks is observed, and obviously, the printing inks added with the polyvinyl chloride resin are stronger in adhesion and more durable.

In summary, the photosensitive emulsion has the advantages of good stability, long storage time, high film forming strength, high printing resistance, high plate making precision and high resolution; the oily cleaning agent has good degumming effect and convenient use, and does not need to additionally increase wiping force; the surface area of the silk screen is fully utilized, redundant alignment and adjustment actions in printing are simplified, and the printing efficiency is improved; the printing ink printed on the printing piece is not easy to lose and drop, and is more durable. The embodiment 3 is the best mode.

It should be noted that the present embodiment is only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications to the embodiment without inventive contribution as required after reading the present specification, but all the modifications are protected by patent law within the scope of the claims of the present invention.