Carbon oil filling hole method and equipment for single-sided carbon oil filling hole PCB

Abstract

The invention relates to a carbon oil hole filling method and equipment for a single-sided carbon oil filling hole PCB. The method is characterized by comprising the steps that a screen print mechanism performs screen print on the reverse side of the PCB; meanwhile, a ventilation mechanism performs ventilation on the obverse side of the PCB, and therefore carbon oil on the reverse side of the PCB is absorbed into oil holes in the PCB. The carbon oil filling hole equipment adopted in the carbon oil hole filling method comprises the screen print mechanism, an exhaust fan, a working table and a carbon oil filling hole panel subplate, wherein the exhaust fan is installed on the working table, and the exhaust fan is located below the top surface of the working table; the carbon oil filling hole panel subplate is installed on the top surface of the working table; the screen print mechanism is located above the carbon oil filling hole panel subplate. As carbon oil hole filling and PCB reverse circuit printing can be completed in a one-off mode, working efficiency can be substantially enhanced, the carbon oil is saved, and energy consumption is lowered. Meanwhile, the auxiliary examination procedures are reduced, product quality is effectively improved, and the rejection rate is greatly lowered.

Description

technical field [0001] The invention relates to a carbon oil filling method and equipment for a single-sided carbon oil filling printed circuit board. Background technique [0002] The single-sided carbon oil filled printed circuit board is a printed circuit board that replaces the traditional PTH by filling through the carbon paste to connect the lines on both sides of the printed circuit board. For PCB boards that do not require high wire resistance, in order to reduce costs, the through-hole connection can be completed by carbon filling process to achieve the purpose of reducing costs. The hole resistance of carbon filling holes is generally below 50 ohms, and the conductivity is stable and reliable. Counters and remote controllers are often used in PCB boards, so single-sided carbon oil filled printed circuit boards are widely used in toys, small household appliances and other fields. In the production process of single-sided carbon oil filled printed circuit boards, th...

AI Technical Summary

Problems solved by technology

[0022] B. If the circuit board is pre-baked, there will be a difference in height when the circuit is printed on the back of the circuit board, making it difficult to apply oil to the position with the difference in height, which will affect the electrical conductivity of the position

[0023] C. If the circuit board is pre-baked, there are two layers of oil at the opening of the filling hole when the circuit is printed on the back of the circuit board, while the other parts of the circuit have only one layer of oil, which has a serious unevenness and affects the appearance. If the button The position is close to the hole position, which will also affect the trigger performance of the key

[0024] D. When pre-baking is not performed, it is easy to scratch the circuit when printing the circuit on the back of the circuit board, resulting in an open circuit or a short circuit

[0025] E. When pre-baking is not performed, because there is ink filled in the hole position, when the circuit on the back of the printed circuit board is scraped, the ink is easily scraped flat, or even scraped to other positions, resulting in a short circuit

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