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    电脑键盘的丝印工艺流程!
    2019-02-09 23:43:15
    今年来随着计算机的国产化,需要在ABS塑胶键上网印字符的工件越来越多。国内对塑胶印字虽有介绍,但多是用于装饰性的,而且丝印印面积较大,对字迹精度,牢固程度要求不很高,而且字键经常与手指接触,因此要求字符在塑胶键上的附着牢固度要好,耐磨性要强,并应具有耐溶剂、耐手汗等性能。
    This year, with the localization of computers, more and more jobs need to print characters on ABS plastic keys. Although plastic printing is introduced in China, it is mostly used for decoration, and the screen printing area is large, the accuracy and firmness of the handwriting is not very high, and the keys are often in contact with fingers. Therefore, it is required that the characters adhere to the plastic keys with good firmness, strong wear resistance, solvent resistance, hand sweat resistance and other properties.
    由于字键面积。坑侄,用反贴法印字显然不适合,因此采用丝网漏印法。为解决字键之间凹凸不平的的现象,在网印时要按字键的排列情况,制作专用夹具。
    Because of the small area and large number of keys, it is obviously unsuitable to use the back-pasting method for printing, so the silk screen leak printing method is adopted. In order to solve the problem of uneven keys, special fixture should be made according to the arrangement of keys in screen printing.
    ①印刷适应性强
    (1) Good printing adaptability
    平印、凸印、凹印三大印刷方法一般只能在平面的承印物上进行印刷。而丝网印刷不但可以在平面上印刷,也可以在曲面、球面及凹凸面的承印物上进行印刷。另一方面,丝网印刷不但可在硬物上印刷,还可以在软物上印刷,不受承印物的质地限制。除此之外,丝网印刷除了直接印刷外,还可以根据需要采用间接印刷方法印刷,即先用丝网印刷在明胶或硅胶版上,再转印到承印物上。因此可以说丝网印刷适应性很强,应用范围广泛。
    The three printing methods of lithography, embossing and gravure printing can only be printed on the flat impression. Screen printing can be printed not only on the plane, but also on the surface, sphere and concave-convex surface. On the other hand, screen printing can be printed not only on hard material, but also on soft material, which is not limited by the quality of the printed material. In addition, besides direct printing, screen printing can also be printed indirectly according to need, that is, screen printing on gelatin or silicone plate, and then transfer to the substrate. So it can be said that screen printing has strong adaptability and wide application range.
    ②立体感强
    (2) Strong stereoscopic sense

    质感丰富胶印和凸印的墨层厚度一般为5微米,凹印为12微米左右,柔性版(苯胺)印刷的墨层厚度为10微米,而丝网印刷的墨层厚度远远超过了上述墨层的厚度,一般可达30微米左右。专门印制电路板用的厚丝网印刷,墨层厚度可至1000微米。用发泡油墨印制盲文点字,发泡后墨层厚度可达1300微米。丝网印刷墨层厚,印刷品质感丰富,立体感强,这是其它印刷方法不能相比的。丝网印刷不仅可以单色印刷,还可以进行套色和加网彩色印刷。

    济南丝网印刷

    Ink layer thickness of offset and relief printing with rich texture is generally 5 microns, gravure printing is about 12 microns, flexographic (aniline) printing is about 10 microns, and screen printing is much thicker than the above ink layer thickness, generally up to 30 microns. Thick screen printing for printed circuit boards, ink thickness can reach 1000 microns. Braille characters are printed with foaming ink. The thickness of the ink layer after foaming can reach 1300 microns. Screen printing has thick ink layer, rich printing quality and strong stereoscopic sense, which can not be compared with other printing methods. Screen printing not only can be monochrome printing, but also can be used for color matching and screen printing.
    ③耐光性强
    3. Strong light resistance
    色泽鲜艳由于丝网印刷具有漏印的特点,所以它可以使用各种油墨及涂料,不仅可以使用浆料、粘接剂及各种颜料,也可以使用颗粒较粗的颜料。除此之外,丝网印刷油墨调配方法简便,例如,可把耐光颜料直接放入油墨中调配,这是丝网印刷的又一大特点。丝网印刷产品有着耐光性强的极大优势。经实践表明,按使用黑墨在铜版纸上一次压印后测得的最大密度值范围进行比较,胶印为1.4、凸印为1.6、凹印为1.8,而丝网印刷的最大密度值范围可达2.0,因此丝网印刷产品的耐光性比其它种类的印刷产品的耐光性强,更适合于在室外作广告、标牌之用。
    Because screen printing has the characteristics of leak printing, it can use various inks and coatings, not only slurries, adhesives and various pigments, but also coarse particles of pigments. In addition, screen printing ink formulation method is simple, for example, light-resistant pigments can be directly put into the ink allocation, which is another major feature of screen printing. Screen printing products have great advantages in light resistance. Practice shows that the maximum density range measured by using black ink on copperplate paper is 1.4 for offset printing, 1.6 for relief printing and 1.8 for gravure printing, while the maximum density range of screen printing can reach 2.0. Therefore, the light resistance of screen printing products is stronger than that of other types of printing products, and it is more suitable for outdoor advertising and labeling.
    ④印刷面积大
    (4) Large printing area
    一般胶印、凸印等印刷方法所印刷的面积尺寸最大为全张尺寸,超过全张尺寸,就受到机械设备的限制。而丝网印刷可以进行大面积印刷,当今丝网印刷产品最大幅度可达3米×4米,甚至更大。
    Generally, offset printing, embossing and other printing methods print the largest area size of the full sheet size, exceeding the full sheet size, it is limited by mechanical equipment. Screen printing can be used for large-area printing. Today, the maximum range of screen printing products can reach 3 meters *4 meters, or even larger.
    以上四点均是丝网印刷与其它印刷的区别,同时也是丝网印刷的特点及优势。了解了丝网印刷的特点,在选取印刷方法上,就可以扬长避短,突出丝网印刷的优势,以此达到更为理想的印刷效果。
    The above four points are the difference between screen printing and other printing, but also the characteristics and advantages of screen printing. Understanding the characteristics of screen printing, in the selection of printing methods, we can make full use of advantages and avoid disadvantages, highlight the advantages of screen printing, in order to achieve a better printing effect.
    丝网印刷同其他印刷一样需要准确地再现原稿的图文及色调。丝网印刷所采用的原稿原则上和其它印刷方法所用原稿没有很大差异,但在具体的制版、印刷实践中,其要求就有不同之处,这主要是由于丝网印刷特性所决定的。特别是由于丝网印刷墨层厚实、色泽鲜艳,所以在选择原稿及制版时要充分考虑丝网印刷的特殊效果。
    Screen printing, like other printing, needs to accurately reproduce the original pictures and tones. In principle, the manuscripts used in screen printing are not very different from those used in other printing methods, but in the practice of plate making and printing, the requirements are different, which is mainly determined by the characteristics of screen printing. Especially because of the thick ink layer and bright color of screen printing, the special effect of screen printing should be fully considered when selecting manuscripts and plate making.
    若印制的图形面积过大,可根据情况将油墨倒在版面上,但不要让油墨流出承印物。注意调配的油墨不要太。膊灰,干湿适中为好。小面积印字、印画,可一人操作,方法是将活面版的一端用包装胶带贴于承印物机所需位置上,然后,用另一只手拉紧印版紧贴承印物上,即可进行印刷。起版注意:一定按贴好胶带一端的方向较轻起版,若两人操作起版广告也是如此,采用此种方法印刷,具有操作方便,对承印物的要求灵活,能大能。靠啥嗫缮,具有成本低谦节约能源的优点。
    If the printing area is too large, the ink can be poured on the plate according to the situation, but do not let the ink flow out of the substrate. Attention should be paid to the blending of ink not too thin, nor too dry, wet and dry is better. Small area printing, printing, can be operated by one person, the method is to use packaging tape at one end of the face plate on the position required by the printer, and then, with the other hand to tighten the plate on the substrate, you can print. Initiation Note: It must be lighter in the direction of one end of the tape. If two people operate the initial advertisement, the printing method has the advantages of easy operation, flexible requirements for the prints, large capacity and small quantity, low cost, modest and energy saving.