Cosmetic glass bottle electroplating process introduction

Cosmetic glass bottle electroplating process introduction

Electroplating is the abbreviation of electrolytic metal plating. Electroplating is to immerse the plated parts (products) in the potion containing the metal ions to be plated and connect the cathode and place an appropriate anode (soluble or insoluble) on the other end of the potion. method of layering metal into thin films. A simple understanding is the change or combination of physics and chemistry. The most commonly encountered electroplating methods at present: aqueous electroplating (barrel plating, rack plating, continuous plating), chemical plating.

Process cost: mold cost (none), single piece cost (high);

typical products: surface treatment of vehicles, consumer electronics, furniture, jewelry and silverware, etc.;

the output is suitable: single piece to large batch;

quality: extremely high gloss, anti-oxidative corrosion;

speed: Moderate speed, depending on material type and coating thickness.

1. Electroplating equipment

The biggest functional advantage of electroplating is that a new and extremely glossy metal layer can be formed on the surface of both metal and non-metal parts, which directly improves the visual quality of the original parts. The cost is much lower than direct metal forming parts. Electroplating of specific areas on the surface of the same part can be applied to areas that do not require electroplating with special waxes and coatings. Chrome plating is widely used for surface treatment in the vehicle and furniture industries.

2. Main materials

There are more than 30 types of electroplating metals, of which more than ten are widely used, including galvanized, cadmium, copper, nickel, chromium, silver, tin, gold, iron, cobalt, lead, antimony, platinum, titanium, cymbal, etc. kind. In addition to single metal coatings, there are many alloy coatings, such as copper-tin, copper-zinc, copper-nickel, nickel-iron, lead-tin, zinc-tin, zinc-iron, zinc-nickel, copper-cadmium, zinc-cadmium, tin-iron, tin-cobalt, Iron tungsten, etc.

In terms of plastics, ABS is the most commonly used, because ABS can withstand the high temperature of electroplating at 60°C (140°F), and its electroplating layer and non-plating layer have high bonding strength. Most metals can be electroplated, but different metals have different grades. Purity and plating efficiency. The most common of these are: tin, chromium, nickel, silver, gold and rhodium (rhodium: a type of platinum that is extremely expensive and maintains high brightness for a long time, and can resist most chemicals and acids. Most commonly used to add luster to product surfaces products with extremely high requirements, such as trophies and medals), nickel metal should not be used for electroplating products that come into contact with the skin because nickel is irritating and toxic to the skin.

3. Coating description

According to the coating, it can be divided into chrome plating, copper plating, cadmium plating, tin plating, zinc plating and so on.

During electroplating, the plated metal or other insoluble material is used as the anode, the workpiece to be plated is used as the cathode, and the cations of the plated metal are reduced on the surface of the workpiece to be plated to form a plated layer. In order to eliminate the interference of other cations and make the coating uniform and firm, a solution containing metal cations in the coating should be used as the electroplating solution to keep the concentration of the metal cations in the coating unchanged. The purpose of electroplating is to coat a metal coating on the substrate and change the surface properties of the substrate.

We take the common electroplating of ABS plastic parts as an example. ABS electroplating is to chemically corrode B (butadiene) in ABS, so that some loose pores appear on the surface of the product, and then a layer of conductor (such as copper) is attached to make it able to conduct electricity and is subsequently electroplated in the same way as metal electroplating. Therefore, ABS plating is a mixture of electroless plating and electroplating.

4. Electroplating process

Pretreatment (grinding→preliminary cleaning→water washing→electrolytic degreasing→water washing→acid dipping and activation→water washing)→neutralization→water washing→electroplating (priming)→water washing→neutralization→water washing→electroplating (surface layer)→water washing→ Pure water→Dehydration→Drying

In the cosmetic packaging industry, since the electroplated coating cannot be in direct contact with the contents, the electroplating process is mainly applied to external components, such as various packaging material shells, lipstick shells, bottle cap shells, cosmetic tool components, etc.