ABS電鍍問題1.漏鍍是指注塑件局部未電鍍，使塑料表面外露，一般漏鍍可

ABS電鍍問題1.漏鍍是指注塑件局部未電鍍，使塑料表面外露，一般漏鍍可分為片狀漏鍍與針孔漏鍍兩種類型。片狀漏鍍，顧名思義，即漏鍍的區域呈片狀；針孔漏鍍是指化學鍍鎳後工件表面有很小的點狀漏鍍。在電鍍後這種缺陷很容易與麻點相混淆，兩者區別在於在這個點上有沒有金屬沉積，沒有金屬沉積的就是針孔漏鍍。2.結合力不良結合力的關鍵因素在於：選材、注塑件結構設計、注塑工藝、除油等。其中以選材為例：電鍍型ABS：電鍍型ABS塑料中丁二烯含量達22%～24%，鍍層結合力比非電鍍型ABS樹脂高不少。一定範圍內ABS塑料中丁二烯含量越高,鍍層的結合力就越好。丁二烯含量低於18%或高於24%都會導致塑件表面鍍層鉚合效應低，鍍層與塑件附著力差，所以選材很關健。 3.化學鎳粗糙，針孔造成上述缺陷的可能原因：鉻酸與硫酸的比例失調或偏低，粗化液中三價鉻含量偏高；粗化時間過短或過長，粗化溫度過低或過高；粗化液受到污染。長時間使用後，粗化液中溶解的丁二烯膠物過多，阻礙粗化。解決方案：粗化液中鉻酸與硫酸的比例應控制在1∶1，且三價鉻含量不超過15 g/L；粗化溫度控制在62 ～ 68 ℃，時間5 ～ 10 min；粗化液受到污染後，應更換1/3鍍液並清缸處理。半年應更新1/3粗化液。4.掛具上鍍上鍍層主要原因：鈀缸濃度偏高，化學鍍鎳反應過快，沒有及時清洗濾泵及更換槽液。解決方案：換粗化後各水洗槽、中和及活化槽；降低鈀缸藥品濃度，或縮短工件在鈀缸工序的生產時間；在使用掛具生產之前將掛具表面清洗乾淨，必要時可以在粗化缸浸泡以徹底清除掛具表面吸附的雜質；縮短化學鍍鎳時間；延長粗化工序的生產時間。

結果 (英文) 1:

Electroplating ABS problem


1. leakage plating means plating an injection member partially not, the exposed surface of the plastic, the sheet can be divided into general drain leakage plating plating plating pinhole leak two types. Plating a sheet drain, by definition, that the drain region of the plating flaky; refers to pinhole leak plating the surface with a very small leak point after electroless nickel plating. After plating such defects are easily confused with pits, difference between the two is that at this point there is no metal deposition, metal deposition is no leakage of plating pinholes.
2. The key factor binding force poor binding force that: the selection, design injection molding, injection molding, degreasing. In an example wherein selection: Plating type ABS: ABS plastic type plating butadiene content of 22% to 24% coating adhesion than non-plated ABS resin-type lot. ABS plastic higher butadiene content within a certain range, the better coating adhesion. A butadiene content of less than 18% or more than 24% will lead to plastic rivet low alloy surface cladding effect, plastic coating and poor adhesion, it is the key selection.



3. Chemical Nickel rough, causing pinholes possible causes of the defect: the ratio of chromic acid and sulfuric acid or disorder low roughening trivalent chromium content was high; coarsening time is too short or too long, excessive coarsening temperature low or too high; roughening are contaminated. After prolonged use, the crude solution of butadiene rubber was dissolved in excess, roughened hindered. Solution: roughening solution of chromic acid and sulfuric acid should be controlled in proportion 1:1, and trivalent chromium content not exceeding 15 g / L; coarsening temperature was controlled at 62 ~ 68 ℃, time 5 ~ 10 min; coarsening after the contaminated liquid, and replace the bath 1/3 cylinder cleaning process. Six months should be updated 1/3 roughening solution.

4. The electroless plating on the upper rack main reasons: high palladium concentration tank, a nickel plating reaction was too fast, not timely cleaning bath by filtration and replacement pumps. Solution: for the roughening of each washing tank, neutralization and activation chamber; lower drug concentration of the palladium cylinder, or reduction in work production time of a palladium cylinder step; before use rack producing the rack clean the surface, can, if necessary, in the roughened cylinder immersed completely remove adsorbed impurities linked to the surface; shortening the electroless nickel plating time; roughening step prolonged production time.

結果 (英文) 2:

ABS plating problems

1. Leak plating refers to the injection molding parts local not plating, so that the plastic surface exposed, the general leakage plate can be divided into flaky leakage plate and pinhole leakage two types. Flaky leakage plating, as the name implies, that is, the area of leakage is flaky, and pin hole leakage refers to chemical nickel plating after the surface of the workpiece has a very small point-shaped leakage plating. After electroplating, this defect is easily confused with the hemp dot, the difference is that there is no metal deposit at this point, no metal deposit is the pinhole leakage plating.
2. The key factors of the bad combination force are: material selection, injection molding structure design, injection molding process, de-oil, etc. Take material selection as an example: electroplating ABS: electroplating ABS plastic in butadiene content of 22% to 24%, the binding force of the plating than non-electroplating ABS resin is much higher. The higher the content of butadiene in ABS plastic within a certain range, the better the binding force of the coating. Butadiene content is less than 18% or more than 24% will lead to the plastic surface coating riveting effect is low, coating and plastic attachment is poor, so the material selection is very critical.

3. Chemical nickel rough, pinhole caused the above defects of the possible reasons: chromic acid and sulfuric acid ratio imbalance or low, crude liquid in the three-price chromium content is high; After long-term use, there is too much butadiene glue dissolved in the coarse solution, which hinders coarsening. Solution: The ratio of chromic acid to sulfuric acid in coarse solution should be controlled at 1:1, and the content of triavachromium should not exceed 15 g/L, the coarse temperature control should be controlled at 62 to 68 degrees C, time 5 to 10 min, and after the coarse liquid is contaminated, the plated liquid should be replaced and cleared. Half years should be updated 1/3 of the coarse liquid.

4. The main reasons for coating on the hanging gear: high concentration of the crucible cylinder, the reaction of chemical nickel plating is too fast, and the filter pump is not cleaned in time and the fluid is replaced. Solution: after the roughing of each washing tank, medium and activation grooves, reduce the concentration of tantalum cylinder drugs, or shorten the production time of the workpiece in the crucible process, before the production of the hanging gear will be cleaned, if necessary, the rough cylinder can be soaked to completely remove the surface adsorption of impurities, shorten the chemical nickel plating time, extend the production time of the roughing process.

結果 (英文) 3:

ABS electroplating problems
1. Missing plating refers to the fact that the injection parts are partially unplated to expose the plastic surface. Generally, there are two types of missing plating: sheet missing plating and pinhole missing plating. As the name implies, the area of missing plating is flake; pinhole missing plating refers to the small spot like missing plating on the surface of workpiece after electroless nickel plating. This kind of defect is easy to be confused with pitting after electroplating. The difference between the two is whether there is metal deposition at this point. If there is no metal deposition, it is pinhole missing plating.
2. The key factors of poor binding force are material selection, structural design of injection parts, injection process, oil removal, etc. For example, electroplated Abs: the content of butadiene in electroplated ABS plastics is 22% - 24%, and the coating adhesion is much higher than that of non electroplated ABS resins. In a certain range, the higher the content of butadiene in ABS plastics, the better the adhesion of the coating. If the content of butadiene is lower than 18% or higher than 24%, the riveting effect of the coating on the surface of the plastic part will be low, and the adhesion between the coating and the plastic part will be poor, so the material selection is very important.
3. The possible causes of the above defects are: maladjustment or low ratio of chromic acid and sulfuric acid, high content of trivalent chromium in roughening solution, too short or too long roughening time, too low or too high roughening temperature, and pollution of roughening solution. After long-term use, too much butadiene rubber dissolved in the coarsening solution hinders coarsening. Solution: the proportion of chromic acid and sulfuric acid in the roughing solution shall be controlled at 1:1, and the trivalent chromium content shall not exceed 15 g / L; the roughing temperature shall be controlled at 62-68 ℃, and the time shall be 5-10 min; after the roughing solution is polluted, the 1 / 3 plating solution shall be replaced and the cylinder shall be cleaned. 1 / 3 roughening solution should be renewed in half a year.
4. The main reasons for plating on the hanger: the concentration of palladium cylinder is too high, the reaction of electroless nickel plating is too fast, and the filter pump is not cleaned and the tank solution is not replaced in time. Solution: after roughening, each water washing tank, neutralization tank and activation tank shall be replaced; drug concentration of palladium cylinder shall be reduced, or production time of workpiece in palladium cylinder process shall be shortened; surface of hanging appliance shall be cleaned before production of hanging appliance; if necessary, impurities adsorbed on the surface of hanging appliance can be completely removed by soaking in roughening cylinder; time of electroless nickel plating shall be shortened; production time of roughening process shall be prolonged.