CN203513798U

CN203513798U - Liquid spraying system for etching machine

Info

Publication number: CN203513798U
Application number: CN201320708384.3U
Authority: CN
Inventors: 邵永明; 童德明
Original assignee: LIN'AN SHENGDA ELECTRONICS FACTORY
Current assignee: LIN'AN SHENGDA ELECTRONICS FACTORY
Priority date: 2013-11-11
Filing date: 2013-11-11
Publication date: 2014-04-02
Anticipated expiration: 2023-11-11

Abstract

The utility model relates to a liquid spraying system for an etching machine. The utility model aims to provide the system which can not only keep the etching quality but also ensure the etching process consistency. The liquid spraying system has the advantages of simple structure and convenience in manufacturing. According to the technical scheme, the liquid spraying system for the etching machine comprises a plurality of parallel liquid spraying pipes which are mounted in an internal cavity of a machine body and are hung above a conveyor belt, and a liquid supply assembly for supplying acid etching liquid for the liquid spraying pipes, wherein the liquid spraying pipes are horizontally distributed and transversely extend in the width direction of the conveyor belt. The liquid spraying system is characterized in that a plurality of vertical downward nozzles are mounted on each spraying pipe; the nozzles on the liquid spraying pipes are arranged in the shape with both hither ends and a lower middle part, and are respectively communicated with the liquid spraying pipes through corresponding transition pipes.

Description

Etching machine spray system

Technical field

The utility model relates to a kind of spray system of circuit card etching system, especially etching machine of circuit board.

Background technology

Printed circuit board (PCB) (pcb board) Production Flow Chart comprises the operations such as cutting copper-clad plate, pre-treatment copper-clad plate, printed circuit board circuitry, etched circuit board, drilling holes on circuit board, wiring board pre-treatment, and etching machine is key equipment wherein.Before pickling etched circuit board, need first to print one deck ink and cover the circuit needing protection, then by travelling belt, send into etching machine, with acidic etching liquid, unwanted copper metal is removed, then wash away aforesaid ink; Finally obtained etched pcb board.

Existing etching is often found the inconsistent problem of pcb board etching progress rate in producing; The etching of pcb board that is positioned at transmission bandwidth degree dual-side edge completes, and the pcb board that is positioned at travelling belt central part residual more not removed metal still, thereby normal production is brought to considerable influence.

Utility model content

The purpose of this utility model is the deficiency overcoming in above-mentioned background technology, and a kind of improvement of etching machine spray system is provided, and this system should be able to guarantee that etching progress rate is consistent when keeping etching quality, and simple in structure, making facility.

The technical scheme that the utility model provides is: etching machine spray system, comprise being installed on body inner chamber and dangling and provide the liquid supply assembly of acidic etching liquid at several sparge pipes that are parallel to each other of travelling belt top and for aforementioned sparge pipe, described sparge pipe all horizontally disposed and lateral extent, at the width of travelling belt, is all installed with several vertically nozzles down on each sparge pipe; It is characterized in that the nozzle arrangement on described each sparge pipe becomes shape low between the senior middle school of two ends, and respectively by the described sparge pipe of transition conduit connection separately.

The described circular arc that is shaped as.

The described trilateral that is shaped as.

Described liquid supply assembly is for transporting to acidic etching liquid by pipeline the corrosion-resistant liquid pump of sparge pipe.

Principle of work of the present utility model is: because the nozzle of middle part has moved down height, the following pcb board of distance near (and the following pcb board of the nozzle distance at two ends is far away), thereby the flow velocity of the acidic etching liquid of ejection is greater than the acid etching flow velocity of two ends nozzle ejection, also just obviously accelerated the etching speed of middle part pcb board, and then the etching speed that makes the pcb board on travelling belt kept unanimously, eliminated the inconsistent shortcoming of existing equipment etching progress rate.

The beneficial effects of the utility model are: the spray system that the utility model provides, by the adjustment to nozzle location, solved the inconsistent defect of etching machine etching progress rate, and also significantly improved quality product; And the utility model is simple in structure, easy to make, cost of manufacture is also substantially constant.

Accompanying drawing explanation

Fig. 1 is main TV structure schematic diagram of the present utility model.

Fig. 2 is left TV structure schematic diagram of the present utility model.

Embodiment

Below in conjunction with Figure of description, the utility model is described in further detail.

Etching machine spray system shown in the drawings, several sparge pipes 5 are installed in parallel to each other body 1 inner chamber and dangle in travelling belt 2 tops, these sparge pipes all horizontally disposed and lateral extent at the width of travelling belt, on each sparge pipe, be all installed with several vertically nozzles down (nozzle is connected sparge pipes by transition conduit 3; Thereby the nozzle in figure is arranged on the bottom of transition conduit); Liquid supply assembly is to provide the corrosion-resistant liquid pump (omitting in figure) of acidic etching liquid by pipeline 4 for aforementioned sparge pipe; The acidic etching liquid refluxing is connected container for storing liquid 6 by pipeline.

General, whole etching production line needs many etching machines and cleaning machine to be composed in series (in figure, only showing an etching machine), travelling belt is carrying pcb board and is passing through successively after too much platform etching machine and cleaning machine, and (arrow A in Fig. 2 is the working direction of travelling belt carrying pcb board to complete etch process; Arrow B is travelling belt Return-ing direction).

These all with the structure of existing etching machine roughly the same.

In existing etching machine, the height that each nozzle is installed is identical, and the acidic etching liquid speed of ejection also roughly the same; Yet in etching process, trickling contains cupric ion (cupric ion being dissolved down) acidic etching liquid on pcb board face constantly to be changed because corrosive power weakens needs, but acidic etching liquid mobile that is positioned at travelling belt middle part is subject to the stopping of acidic etching liquid at travelling belt width direction two ends, and flow velocity will be lower than the flow velocity of two ends acidic etching liquid; So it is relatively slow to be positioned at the etching speed of pcb board of travelling belt middle part.

For this reason, the utility model is readjusted the high and low position of the nozzle on described each sparge pipe, and specifically according to shape low between the senior middle school of two ends, (the preferred circular arc P of described shape can be also trilateral W; All with two dot chain line, represent) arrange, then each nozzle is respectively by the described sparge pipe of transition conduit 3 connection separately.Obviously, need to make the transition conduit (normally plastics tubing) of different lengths

Because the acidic etching liquid in liquid supply assembly input sparge pipe exists pressure, thus the acidic etching liquid speed while just spray from nozzle (strength is also larger) greatly, speed can slow down gradually (strength also reduces) after the air of a segment distance stops.So arrange in several nozzles according to shape low between the senior middle school of two ends, the nozzle distance pcb board of middle part is nearer, and the acidic etching liquid speed of ejection is larger, thereby the acid etching flow velocity after falling on this position pcb board is also larger; Although the nozzle distance pcb board of two-end part is far away, the acidic etching liquid speed relatively little (flow velocity is also slower) of ejection, yet the acidic etching liquid of middle part flows through travelling belt width direction two ends leaves travelling belt (container for storing liquid while being back to), also improved the acidic etching liquid speed of travelling belt width direction two-end part, and then the etching speed of all pcb boards of travelling belt width direction is consistent.

Claims

1. etching machine spray system, comprise being installed on body (1) inner chamber and dangling and provide the liquid supply assembly of acidic etching liquid at several sparge pipes that are parallel to each other (5) of travelling belt top and for aforementioned sparge pipe, described sparge pipe all horizontally disposed and lateral extent, at the width of travelling belt (2), is all installed with several vertically nozzles down on each sparge pipe; It is characterized in that the nozzle arrangement on described each sparge pipe becomes shape low between the senior middle school of two ends, and respectively by the described sparge pipe of transition conduit (3) connection separately.

2. etching machine spray system according to claim 1, is characterized in that: described in be shaped as circular arc.

3. etching machine spray system according to claim 1, is characterized in that: described in be shaped as trilateral.

4. according to the etching machine spray system described in claim 2 or 3, it is characterized in that: described liquid supply assembly is for transporting to acidic etching liquid by pipeline the corrosion-resistant liquid pump of sparge pipe.