Secondary chromeplating process of printing round-net die
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A technology for printing rotary screen and mold, applied in jewelry and other directions, can solve the problems of inability to continuously produce, poor uniformity of screen making, short service life, etc., and achieve the effect of not easy to drop glue, high genuine product rate, and lower production cost.
Active Publication Date: 2013-02-13
江苏东方镍网有限公司
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Problems solved by technology
It overcomes many shortcomings such as easy degumming of nickel-plated molds, short service life, inability to continue production, poor mesh uniformity, and low opening rate.
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[0020] The secondary chrome plating process of printing rotary screen mold, the processing steps are as follows:
[0021] 1. Nickel plating operation steps:
[0022] 1). In the mold blank preparation stage, the process of the chrome-plated mold and the nickel-plated mold is the same; the processed mold blank is hoisted into the nickel-plating tank for nickel plating, and the speed is 50-70 rpm;
[0023] 2). According to the number and size of the mold base, set the power on the rectifier to 15-200 ampere hours;
[0024] 3). Start the rectifier, regardless of the size of the mold base, the current is set at 50 amperes;
[0025] 4). After 3-5 minutes of electroplating, increase the current to 150-300 amperes according to the number and size of the mold blank until the electroplating is completed;
[0026] 5) After the electroplating is completed, stop the rotation, lift the mold blank, and rinse the mold blank with pure water;
[0027] Second, the first chrome plating op...
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Abstract
A secondary chromeplating process for a printing round-net die includes: plating nickel on a processed die blank, and performing first-time chromeplating and second-time chromeplating, wherein the first-time chromeplating solution is prepared by 240-350g/l of chromium trioxide, 2-10g/l of chromium sesquioxide, 2-5g/l of sulfuric acid and purified water; and the second-time chromeplating solution is prepared by 80-140g/l of chromium trioxide, 1-8g/l of chromium sesquioxide, 200-700mg/l of chloridion and purified water. A layer of chromate film is added on the first-time chromeplating surface of the die blank and firmly bonded in hexagonal net points of the die blank, when insulator glue is embedded in the hexagonal net points of the die blank, the chromate film can be well bonded, and glue dropping cannot be generated. The printing round-net die produced by the secondary chromeplating process is high in surface smoothness, long in service life, good in net evenness and high in poring rate and overcomes the shortcomings existing in the prior art.
Description
technical field [0001] The invention relates to a chrome-plating process, in particular to a secondary chrome-plating process for a printing cylinder mold. technical background [0002] Printing rotary screen, also known as nickel screen, is a necessary consumable equipment for rotary screen printing machines. It is a cylindrical cylinder without joints, with a specific number of meshes on the surface, and a hexagonal screen uniformly arranged in a honeycomb shape. hole, see attached figure 1 ; According to the number of meshes, there are 10 meshes, 20 meshes, 30 meshes, 40 meshes, 60 meshes, 80 meshes, 100 meshes, 125 meshes, 135 meshes, 155 meshes, 165 meshes, 185 meshes, 195 meshes, etc.; To distinguish the length, there are 640 mm, 688 mm, 725 mm, 819 mm, 914 mm, 1018 mm, etc.; to distinguish according to the length of the rotary net, there are 1420 mm-3500 mm, etc.; according to the number of meshes, the length of the circumference and the length of the rotary net Th...
Claims
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Application Information
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