What are the structures of electroplating equipmen

Core Tip: Most electronic connectors, terminals must be surface treated, generally referred to as electroplating. There are two main reasons: one is to protect the terminal reed substrate from corrosion; the other is to optimize the performance of the terminal surface, establish and maintain the contact interface between the terminals, especially the film layer control. In other words, it makes it easier to achieve metal-to-metal contact.
For most electronic connectors, the terminals are surface treated, which is generally referred to as electroplating. There are two main reasons: one is to protect the terminal reed substrate from corrosion; the other is to optimize the performance of the terminal surface, establish and maintain the contact interface between the terminals, especially the film layer control. In other words, it makes it easier to achieve metal-to-metal contact.

This article describes the structure of the electroplating equipment for continuous plated terminals: it is convenient for everyone to better understand the structure of the equipment.

1 medicine sink body

Commonly used materials are PP, PVC, stainless steel. If you do not need heating, you can use PVC tank. If the temperature is below 70 °C, you can use PP tank. If the temperature exceeds 70 °C, you need to use stainless steel tank, but the plating tank is not available stainless steel tank (metal tank 0. In continuous plating, there are The mother tank is used for electroplating syrup, and the sub-tank is used for electroplating. At present, the mother tank is separated, the same body, and the three modes are shared. The design of the mother groove structure is relatively simple, only need to consider water flow, stirring, and stability. Flow, positioning, anode and cathode distance and other factors.

2 trough base

Generally there are plastic medicine troughs, angle iron, stainless steel square tube, black iron lacquer and other methods. In order to consider strength and corrosion resistance, it is recommended to use stainless steel square tubes.

3 water inlet system

Pure water and tap water are generally used. In each tank, there is a water inlet on the sink to supplement the water level and clear the tank. In order to avoid water leakage or human negligence, the plating tank is not equipped with water inlet.

4 drainage system

Generally, the drainage needs to be classified first and then the drainage system. The wastewater continuously electroplated by the terminals is classified into an acid liquid, an alkali liquid, a nickel liquid, a gold liquid, a tin lead liquid, and the like. It is recommended to use more than one inch of pipe for each tank drain. The drainage effect is better. Generally, a single drain valve is provided in the washing tank, and a double drain valve is provided in each plating tank to avoid human inadvertent discharge of the potion. Each sink is provided with an overflow pipe to prevent full water from flowing to its tank.

5 exhaust system

The plating equipment needs to be sealed (that is, there is a cover), and the ventilation effect is provided. An air vent is set up in a tank that mainly generates exhaust gas, and the amount of exhaust air can be adjusted. Due to the extremely high water content in the gas, a drainage device is required. The extracted gas must also be treated as exhaust gas.

6 electric heating system

The heating system is important because the tank needs to be heated. The general heating system consists of a heater, a temperature sensor, a liquid level sensor, a temperature setter, a TIMER, an alarm, and the like. Due to safety concerns, there must be a waterless automatic power-off system. The material immersed in the syrup is the longest used titanium metal, but in the strong alkali medicine tank, it is recommended to use stainless steel or Teflon.

7 cooling system

There are generally direct freezing methods and indirect freezing methods. The direct freezing method is to pump the syrup into the freezer for cooling. This method has a good freezing effect. The indirect freezing method is to indirectly freeze the syrup in the cooling water pipe in the medicine tank. This method has poor freezing effect and is difficult to clear the tank. The cooling method of the freezer is water cooling (requires cooling tower) and air cooling (fan). If the tin-lead syrup can maintain a low temperature for 24 hours, the syrup will not cause turbidity.

8 electronic control system

In addition to the above-mentioned electronic control of the heating and cooling system, there are electronic controls for pumps, filters, oscillators, rectifiers, transmissions, ovens, blowers, etc., which are usually controlled by a power control box. The rectifier and the transmission are set as interlocking devices.

9 wiper equipment

In the continuous plating apparatus, the wiping method includes a method of using a rubber blade, a brush, a blowing, a water absorbing sponge, and the like. Among them, the blowing method has the best effect, but the cost is the highest. At present, the blowing method has the air compressor generating type and the blower generating type. The terminal structure is poor (easy to deform), the brush and the squeegee are not suitable, and the 矽 rubber squeegee is suitable for the flat terminal.

10 drying system

After the plating is finished, the water droplets on the surface of the terminal must be removed, otherwise the drying effect will be poor. Generally dry ovens use HEATER or IR and are dried under hot air circulation. The oven must have a temperature control.

11 Discharge system

Generally, the discharging method is horizontal and vertical. The discharging area is provided with a paper winding device, a linkage switch, and a positioning guide wheel. If the production speed is very fast, it is necessary to provide buffer wiring.

12 receiving system

Generally, the receiving methods are horizontal and vertical. The receiving area shall be provided with a transmission device (some special transmission devices are not in the receiving system), counting devices, linkage switches, receiving devices, paper turntables, positioning guide wheels, if the production speed is fast, it is necessary to set There are buffer wiring.

13 pump filter

Generally, the horizontal and vertical pumps are divided into HP horsepower. The larger the horsepower, the larger the flow rate. The filter filter is usually 1μ, 5μ, 10μ. The smaller the μ, the more particles can be filtered. Small, the better the filtering effect. It is generally recommended to use gold tanks, palladium nickel tanks use 1μ, while others use 5μ filter cores and check regularly every week. The longer the filtration time, the better the effect, such as the best filtration in 24 hours.

14 rectifier

At present, there are controllable silicon rectifiers, electric crystal rectifiers, variable frequency rectifiers, pulse rectifiers, and the like. Because the DC ripple affects the current density range, the smaller the filter, the wider the operational current density, and typically the filter must be below 3%. Among them, the inverter rectifier is the best, and the filtering degree is about 0.1%.

15 positioner

Generally used in the medicine tank are fixed type (used when fully immersed) and adjusted type (selected or used when considering current distribution), and plastic, glass, ceramic, etc. which are made of acid and alkali resistant and heat resistant. As for the positioner outside the tank, most of the stainless steel is used.

16 anode and cathode

The specification of the cathode (positive) pole conductive wire is == maximum operating current / 4 * (number of lines). If the current is 100 amps and the wires are two, the cross-section of the wire needs to be at least 12.5 mm 2 . The anode has a soluble anode and an insoluble anode. The soluble anode is used for supplementation (common to common metal plating), and the insoluble anode is used as an auxiliary anode. For example, when nickel plating is used, nickel metal is used as the dissolved anode, and the titanium basket is used for nickel metal, so it is an insoluble anode. Precious metal plating usually uses an insoluble anode and is electrically conductive, and a noble metal insoluble anode such as platinum is used. Cathode generally refers to the plated part, but the cathode described here is the cathode conductive head for the plated part. Generally, the cathode lead is made of copper alloy or stainless steel. It must be considered for conduction, corrosion resistance, operation and cost. material. The cathode conductive head needs to be in good contact with the plated member, and the smaller the friction, the better.

17 agitator

In order to promote the plating efficiency, increase the plating uniformity, and increase the current density, it is necessary to enhance the stirring effect. Generally used for strong water flow agitation, cathodic oscillation agitation, ultrasonic agitation, air agitation and the like.