Method for increasing durability rate of roller chromium layer of gravure plate

A gravure plate roller and printing durability technology, applied in the field of gravure plate making, can solve the problems of weak chromium layer deposition, weak chromium deposition, low current efficiency, etc. Smooth and bright, high print durability

Active Publication Date: 2016-04-20
DONGGUAN YUNCHENG PLATE MAKING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Due to the limitation of the conductive mechanism of the existing chromium plating technology, the current efficiency is low, which is 10%-15%, the chromium deposition rate is 0.3um / min (10um plating in 35 minutes), the chrome plating current generally needs 65-70A, and the power consumption is large. Moreover, the chromium deposition is not firm and wear-resistant; in order to improve the printing durability of the plate roller, methods such as increasing the thickness of the chromium layer (15-17um) and increasing the hardness of the chromium layer (820-850HV) are generally adopted, but increasing the thickness of the chromium layer, After increasing the hardness, there will be problems such as shallow printing effect and weak chromium layer deposition.

Method used

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  • Method for increasing durability rate of roller chromium layer of gravure plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] See figure 1 , a method for improving the printing durability of the chromium layer of the gravure plate roller, the plate roller is placed in an electroplating tank filled with chrome plating solution for electroplating, and the anode 1 used in the electroplating is a "U"-shaped anode. The cathode 2 (plate roll) is installed in the "U"-shaped cavity of the "U"-shaped anode 1.

[0028] The deposition rate of chromium during electroplating is 0.4 μm / min; the thickness of the chromium plating layer obtained after electroplating is 10 μm.

[0029] The hardness of the chrome-plated layer obtained after the electroplating is 1100Hv.

[0030] The temperature of the electroplating is 59° C.; the rotational speed of the plate roll during the electroplating is 40 m / min.

[0031] The electroplated anode 1 is a lead-tin-silver alloy with a tin content of 20% and a silver content of 0.5%.

[0032] The power transmission method of the electroplating is: first use a small current ...

Embodiment 2

[0040] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0041] The deposition rate of chromium during electroplating is 0.5 μm / min; the thickness of the chromium plating layer obtained after electroplating is 11 μm.

[0042] The hardness of the chrome-plated layer obtained after the electroplating is 1200Hv.

[0043] The temperature of the electroplating is 60° C.; the rotation speed of the plate roll during the electroplating is 45 m / min.

[0044] The electroplated anode 1 is a lead-tin-silver alloy with a tin content of 30% and a silver content of 0.8%.

[0045] The power transmission method of the electroplating is: first use a small current of 5A / dm 2 Electrolyze for 3 minutes, then use an impulse current of 80A / dm 2 Electroplating for 55s; finally use normal current until electroplating is completed.

[0046] The chrome plating solution includes CrO 3 、Cr 3+ 、H 2 SO 4 and additives, among them, CrO 3 The concentration is 295g / L, C...

Embodiment 3

[0049] The difference between this embodiment and the above-mentioned embodiment 1 is:

[0050] The deposition rate of chromium during electroplating is 0.5 μm / min; the thickness of the chromium plating layer obtained after electroplating is 12 μm.

[0051] The hardness of the chrome-plated layer obtained after the electroplating is 1300Hv.

[0052] The temperature of the electroplating is 61° C.; the rotational speed of the plate roll during the electroplating is 50 m / min.

[0053] The electroplated anode 1 is a lead-tin-silver alloy with a tin content of 35% and a silver content of 1%.

[0054] The power transmission method of the electroplating is: first electrolyze with a small current of 5A / dm2 for 2min, and then use an impact current of 85A / dm 2 Electroplating for 60s; Finally, use normal current until the electroplating is completed.

[0055] The chrome plating solution includes CrO 3 、Cr 3+ 、H 2 SO 4 and additives, among them, CrO 3 The concentration is 300g / L,...

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Abstract

The invention relates to the technical field of gravure plate making, particularly to a method for increasing the durability rate of a roller chromium layer of a gravure plate. A printing roller is placed into an electroplating bath containing a chromium plating solution for electroplating; and an anode adopted in the electroplating is a 'U'-shaped anode. According to the method, the anode is transformed, the electric conduction effect is enhanced, the current efficiency is improved, and the deposition rate of chromium is increased, so that the chromium layer deposition is smooth and bright, the abrasion resistance is excellent, the durability rate of the gravure printing roller is increased, the durability rate of the gravure chromium layer is increased, the production cost is reduced, and environmental pollution is also reduced.

Description

technical field [0001] The invention relates to the technical field of gravure plate making, in particular to a method for improving the printing durability of a chrome layer of a gravure plate roll. Background technique [0002] Due to the limitation of the conductive mechanism of the existing chromium plating technology, the current efficiency is low, which is 10%-15%, the chromium deposition rate is 0.3um / min (10um plating in 35 minutes), the chrome plating current generally needs 65-70A, and the power consumption is large. Moreover, the chromium deposition is not firm and wear-resistant; in order to improve the printing durability of the plate roller, methods such as increasing the thickness of the chromium layer (15-17um) and increasing the hardness of the chromium layer (820-850HV) are generally adopted, but increasing the thickness of the chromium layer, After increasing the hardness, there will be problems such as shallow printing effect and weak chromium layer depos...

Claims

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Application Information

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IPC IPC(8): C25D17/12C25D3/10B41N3/03B41N1/20B41N1/06
CPCB41N1/06B41N1/20B41N3/03C25D3/10C25D17/12
Inventor 郝贵龙张晓文贾玉林张朝辉
Owner DONGGUAN YUNCHENG PLATE MAKING
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