CN108859390B - Stretching method of silk-screen polyester screen printing plate - Google Patents
Stretching method of silk-screen polyester screen printing plate Download PDFInfo
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- CN108859390B CN108859390B CN201810851661.3A CN201810851661A CN108859390B CN 108859390 B CN108859390 B CN 108859390B CN 201810851661 A CN201810851661 A CN 201810851661A CN 108859390 B CN108859390 B CN 108859390B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/14—Forme preparation for stencil-printing or silk-screen printing
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- Manufacturing & Machinery (AREA)
- Printing Plates And Materials Therefor (AREA)
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Abstract
The invention discloses a method for stretching a silk-screen polyester screen printing plate, which is characterized in that warps, wefts and a screen frame of a silk screen are calibrated by using a film, so that after the edges of the screen frame and the warps or wefts of the silk screen keep a standard preset angle, screen bonding and glue fixing are carried out, the wave crest and trough difference of sawteeth after printing is obviously reduced, the problem of the sawteeth of the screen printing plate and printing is greatly improved, and the printing yield is improved.
Description
Technical Field
The invention relates to the technical field of screen printing, in particular to a method for stretching a silk-screen polyester screen printing plate.
Background
At present, domestic silk screen printing polyester screen printing plate manufacturing has higher manufacturing level, but when the polyester screen printing plate of high-precision level is manufactured in batches, the angle of putting a screen frame and the extension characteristic of a stretched silk screen lead to the level which can not be close to the standard preset angle (for example, 45 degrees), further, the line crossing of the tangent line of the edge of a pattern after printing is too much, the tangent line saw teeth are obvious (please refer to figure 1), the saw teeth can be seen by naked eyes after the edge of a glass window lens is printed, the difference between the wave peak and the wave trough can be found to be too large by observation under a magnifier, the acceptance of a customer can not be passed, the yield is extremely low, and the number of times of printing resistance.
Disclosure of Invention
The invention mainly aims to provide a method for stretching a silk-screen polyester screen printing plate, which aims to solve the problem that the existing silk-screen polyester screen printing plate still cannot be close to the level of a standard preset angle.
In order to achieve the purpose, the invention provides a method for stretching a silk-screen polyester screen printing plate, which comprises the following steps:
s10: stretching and tightening the silk screen on a screen stretching machine;
s20: placing a screen frame below the screen by taking the warps or the wefts of the screen as reference lines, so that an included angle between the screen frame and the reference lines is approximately alpha;
s30: horizontally placing a film on the upper surface of the silk screen, so that the cut edge of the film is parallel to the reference line;
s40: observing the reference line and the cut edge of the film through a magnifier, adjusting the warp tension and the weft tension of the silk screen according to the observation condition of the magnifier to enable the reference line to be parallel to the cut edge of the film, and adjusting the screen frame to enable an included angle between the screen frame and the cut edge of the film to be alpha;
s50: and bonding the screen frame and the screen mesh, and cutting the screen mesh after drying.
Preferably, α is 45 °.
Preferably, the step S10 includes:
s11: opening a silk screen on the screen stretching machine, closing a warp clamping head of the screen stretching machine, and stretching the warp of the silk screen to enable the tension of the warp of the silk screen to be stabilized at a first preset value, wherein the first preset value is smaller than a rated requirement value;
s12: and closing a weft clamping head of the screen stretching machine, and stretching the weft of the screen mesh to ensure that the tension of the screen mesh is stabilized at the rated requirement value.
Preferably, in step S11, the first predetermined value is half of the rated demand value.
Preferably, the step S12 includes:
s121: stretching the weft threads of the silk screen to keep the tension of the silk screen at the rated required value for t minutes;
s122: gradually increasing the weft tension of the screen stretching machine to gradually increase the tension of the screen to a second preset value, wherein the second preset value is larger than the rated requirement value;
s123: and repeating the previous step n times after the tension of the weft of the screen stretching machine is reduced, so that the tension of the screen is stabilized at the rated required value.
Preferably, the step S10 includes:
closing a chuck of the screen stretching machine, marking a mark line along the contour of a warp chuck or a weft chuck of the screen stretching machine, and checking whether the mark line has a twisted wrinkle after the silk screen is stretched to judge whether the chuck of the screen stretching machine is loosened.
Preferably, the step S30 further includes: and turning on a light source arranged below the silk screen, so that the light of the light source irradiates the area of the silk screen where the film is arranged.
Preferably, the light source is an LED light source of a mobile phone.
Preferably, the magnifying glass is a hand-held microscope.
Preferably, the step S50 includes: and after drying for 10-15 minutes, removing the tension of the screen stretching machine and then scratching the screen printing plate.
According to the technical scheme provided by the invention, warps, wefts and a screen frame of the screen are calibrated by using the film, so that after the edges of the screen frame and the warps or wefts of the screen maintain a standard preset angle, screen bonding and glue fixing are carried out, the wave crest and wave trough difference of sawteeth after printing down is obviously reduced, the problems of screen printing and printing sawteeth are greatly improved, and the printing yield is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a partially enlarged schematic view of a conventional silk-screen polyester screen printing plate;
FIG. 2 is a schematic flow chart of an embodiment of a method for stretching a silk-screen polyester screen printing plate according to the present invention;
FIG. 3 is a detailed flowchart of step S10 in FIG. 2;
fig. 4 is a detailed flowchart of step S12 in fig. 3.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a method for stretching a silk-screen polyester screen printing plate, and fig. 2 to 4 show an embodiment of the method for stretching the silk-screen polyester screen printing plate provided by the invention.
Referring to fig. 2, in the present embodiment, the method for stretching the silk-screen printing polyester screen plate includes the following steps:
and step S10, stretching and tightening the silk screen on the screen stretching machine.
In this embodiment, the mesh is 420 mesh, has a diameter of 27 μm, and is woven by PW. Referring to fig. 3, in the present embodiment, the step S10 specifically includes:
step S11, opening the silk screen on the screen stretching machine, closing the warp clamping heads of the screen stretching machine, and stretching the warp of the silk screen to enable the tension of the warp of the silk screen to be stabilized at a first preset value, wherein the first preset value is smaller than a rated requirement value.
The warp threads of the screen are stretched while the weft grippers of the screen-stretching machine are released, and the first predetermined value is less than the nominal requirement, specifically, in this embodiment, half of the nominal requirement (the nominal requirement is set by the customer, typically 22N ± 1N, and the tension can be measured by a mechanical tensiometer).
S12: and closing a weft clamping head of the screen stretching machine, and stretching the weft of the screen mesh to ensure that the tension of the screen mesh is stabilized at the rated requirement value.
Referring to fig. 4, in the present embodiment, the step S12 includes: s121: stretching the weft threads of the screen so that the tension of the screen is maintained at the nominal required value t minutes (typically around 5 minutes); s122: gradually increasing the weft tension of the screen stretcher to gradually increase the tension of the screen to a second predetermined value, wherein the second predetermined value is greater than the rated requirement (for example, the rated requirement is 22N, and the second predetermined value is 26N); s123: and repeating the previous step n times (usually 2-3 times) after the tension of the weft of the screen stretching machine is reduced, so that the tension of the silk screen is stabilized at the rated requirement value, and the method is favorable for reducing the extension characteristic of the silk screen after being stretched and the influence on the product quality.
In order to avoid the situation that the clamping head of the screen stretching machine loosens and does not clamp the screen, in this embodiment, the step S10 includes: closing a chuck of the screen stretching machine, marking a mark line along the contour of a warp chuck or a weft chuck of the screen stretching machine, and checking whether the mark line has a twisted wrinkle after the silk screen is stretched to judge whether the chuck of the screen stretching machine is loosened.
And step S20, taking the warp or the weft of the silk screen as a reference line, and placing a screen frame below the silk screen so that an included angle between the screen frame and the reference line is approximately alpha.
In this embodiment, the reference line is a radial gripper or a weft gripper of the screen-binding machine. Specifically, the screen frame is the aluminium frame, and is right earlier the screen frame carries out polishing treatment, makes screen frame surface is clean level and smooth, does not have arch and burr, then will the upper surface of screen frame evenly coats the one deck glue, and rethread angle chi will the screen frame is put extremely the below of silk screen, makes the screen frame with the contained angle is alpha (in this embodiment, alpha is 45 degrees) setting approximately between the reference line, accomplishes promptly the preliminary adjustment of screen frame.
And step S30, horizontally placing a film on the upper surface of the silk screen, so that the cut edges of the film are parallel to the reference line.
In this embodiment, the resolution of the film is 25300 dpi. In this step, the cut edge of the film is aligned with the reference line by human eyes.
And S40, observing the reference line and the cut edges of the film through a magnifier, adjusting the warp tension and the weft tension of the silk screen according to the observation condition of the magnifier, so that the reference line is parallel to the cut edges of the film, and adjusting the screen frame, so that an included angle between the screen frame and the cut edges of the film is alpha.
Through the magnifying glass (in this embodiment, the magnifying glass is hand-held type microscope), follow a radial line or weft as far as possible, let the side cut of film with the net twine of silk screen aligns, if it is not up to find the net twine, loosen the weft chuck, adjust warp tension. In order to facilitate observation through the magnifying glass, the step S30 further includes: and turning on a light source (which can be an LED light source of a mobile phone) arranged below the silk screen, so that the light of the light source irradiates the area of the silk screen where the film is arranged.
In addition, in this embodiment, a line is drawn along the cut edge of the film, and the position of the screen frame is adjusted again by using the line as a reference line, so that an included angle between the screen frame and the reference line is set to be α.
S50: and bonding the screen frame and the screen mesh, and cutting the screen mesh after drying.
After the silk screen is adjusted and the tension of the silk screen is stabilized at the rated requirement value, the screen frame is lifted through the screen stretching machine to enable the screen frame to be flatly abutted against the silk screen, and glue is brushed on the overlapping position of the screen frame and the silk screen. It should be specially noted here that the screen frame can not be lifted too high to prevent accidental screen breakage, a layer of screen sticking glue is applied, after drying for 10-15 minutes, the tension of the screen stretching machine is removed, the screen printing plate is cut open, the screen printing plate is marked with the mesh number, the production date, the place where the screen printing plate is placed and ventilated for continuous drying, and the screen printing plate is put into plate making use after being placed for 48 hours.
According to the technical scheme provided by the invention, warps, wefts and a screen frame of the screen are calibrated by using the film, so that after the edges of the screen frame and the warps or wefts of the screen maintain a standard preset angle, screen bonding and glue fixing are carried out, the wave crest and wave trough difference of sawteeth after printing down is obviously reduced, the problems of screen printing and printing sawteeth are greatly improved, and the printing yield is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for stretching a silk-screen polyester screen is characterized by comprising the following steps:
s10: stretching and tightening the silk screen on a screen stretching machine;
s20: placing a screen frame below the screen by taking the warps or the wefts of the screen as reference lines, so that an included angle between the screen frame and the reference lines is approximately alpha;
s30: horizontally placing a film on the upper surface of the silk screen, so that the cut edge of the film is parallel to the reference line;
s40: observing the reference line and the cut edge of the film through a magnifier, adjusting the warp tension and the weft tension of the silk screen according to the observation condition of the magnifier to enable the reference line to be parallel to the cut edge of the film, and adjusting the screen frame to enable an included angle between the screen frame and the cut edge of the film to be alpha;
s50: and bonding the screen frame and the screen mesh, and cutting the screen mesh after drying.
2. The method for stretching a silk-screen polyester screen printing plate according to claim 1, wherein α is 45 °.
3. The method for stretching the silk-screen polyester screen printing plate according to claim 1, wherein the step S10 comprises:
s11: opening a silk screen on the screen stretching machine, closing a warp clamping head of the screen stretching machine, and stretching the warp of the silk screen to enable the tension of the warp of the silk screen to be stabilized at a first preset value, wherein the first preset value is smaller than a rated requirement value;
s12: and closing a weft clamping head of the screen stretching machine, and stretching the weft of the screen mesh to ensure that the tension of the screen mesh is stabilized at the rated requirement value.
4. The method for stretching the silk-screen polyester screen printing plate of claim 3, wherein in the step S11, the first predetermined value is half of the rated requirement value.
5. The method for stretching the silk-screen polyester screen printing plate of claim 3, wherein the step S12 comprises:
s121: stretching the weft threads of the silk screen to keep the tension of the silk screen at the rated required value for t minutes;
s122: gradually increasing the weft tension of the screen stretching machine to gradually increase the tension of the screen to a second preset value, wherein the second preset value is larger than the rated requirement value;
s123: and repeating the previous step n times after the tension of the weft of the screen stretching machine is reduced, so that the tension of the screen is stabilized at the rated required value.
6. The method for stretching the silk-screen polyester screen printing plate according to claim 1, wherein the step S10 comprises:
closing a chuck of the screen stretching machine, marking a mark line along the contour of a warp chuck or a weft chuck of the screen stretching machine, and checking whether the mark line has a twisted wrinkle after the silk screen is stretched to judge whether the chuck of the screen stretching machine is loosened.
7. The method for stretching the silk-screen polyester screen printing plate according to claim 1, wherein the step S30 further comprises: and turning on a light source arranged below the silk screen, so that the light of the light source irradiates the area of the silk screen where the film is arranged.
8. The method for stretching a silk-screen polyester screen printing plate of claim 7, wherein the light source is an LED light source of a mobile phone.
9. The method for stretching silk-screen polyester screen printing plate of claim 1, wherein the magnifying glass is a hand-held microscope.
10. The method for stretching the silk-screen polyester screen printing plate according to claim 1, wherein the step S50 comprises: and after drying for 10-15 minutes, removing the tension of the screen stretching machine and then scratching the screen printing plate.
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| CN201810851661.3A CN108859390B (en) | 2018-07-26 | 2018-07-26 | Stretching method of silk-screen polyester screen printing plate |
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| CN201810851661.3A CN108859390B (en) | 2018-07-26 | 2018-07-26 | Stretching method of silk-screen polyester screen printing plate |
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| CN108859390B true CN108859390B (en) | 2020-10-20 |
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| CN110116543B (en) * | 2019-06-04 | 2020-12-18 | 沃苏特电子科技（苏州）有限公司 | Pull net stress releasing process |
| CN110561887B (en) * | 2019-09-19 | 2020-12-15 | 中国电子科技集团公司第五十四研究所 | Method for stretching high-precision composite screen printing plate for LTCC (Low temperature Co-fired ceramic) |
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Effective date of registration: 20200916 Address after: Baoan District Xin'an street Shenzhen city Guangdong province 518101 District 67 District 1 Building 3 floor COFCO Powerise Applicant after: SHENZHEN INKTOP INK TECHNOLOGY Co.,Ltd. Address before: 518000 No. 11, 603-2 Bamboo Road, Jihe community, Longgang Bay, Shenzhen, Guangdong Applicant before: SHENZHEN JIEBEIER PRECISION SCREEN TECHNOLOGY Co.,Ltd. |
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