CN202450160U

CN202450160U - Constant-temperature etching machine for circuit board

Info

Publication number: CN202450160U
Application number: CN2012200019381U
Authority: CN
Inventors: 刘拼; 袁霄
Original assignee: THREE GORGES VOCATIONAL COLLEGE OF ELECTRIC POWER
Current assignee: THREE GORGES VOCATIONAL COLLEGE OF ELECTRIC POWER
Priority date: 2012-01-05
Filing date: 2012-01-05
Publication date: 2012-09-26
Anticipated expiration: 2022-01-05

Abstract

The utility model discloses a constant-temperature etching machine for a circuit board. The constant-temperature etching machine comprises a machine case, a heating element, an electric water pump, an etching tank and a clear water tank; the etching tank and the clear water tank are arranged in the machine case; the etching tank is connected with the heating element which is connected with the electric water pump; a temperature controller is arranged in the machine case; the output end of the temperature controller is connected with the heating element; and the input end of the temperature controller is connected with a temperature detection element which is positioned in the etching tank. According to the constant-temperature etching machine for the circuit board, a quartz electric heating film heating tube used as the heating element is used for heating etching liquid. The etching liquid continuously flows circularly in the quartz tube under the action of the electric pump, so that the etching liquid in the machine case can be heated. The reliable isolation between water and power can be realized, and the working safety of the etching machine can be guaranteed.

Description

Circuit card constant temperature etching machine

Technical field

The utility model relates to a kind of etching machine, particularly a kind of circuit card constant temperature etching machine.

Background technology

The method of circuit board manufacturing is a lot, with liquor ferri trichloridi the circuit card that is printed on schematic circuit is corroded, and is to make the domestic method of producing circuit card.Under the situation of short run, corrosion process is carried out in etching machine.Circuit card is placed in the etching machine that fills corrosive fluid, waits for that liquor ferri trichloridi is oxidized to CU with the copper-clad surface that circuit card exposes ²⁺, free in solution, when temperature was low, it is slow that this process is carried out, long processing time.For shortening the PT, the normal methods such as adding gentle stirring solution that adopts is accelerated corrosion speed, because iron trichloride is to the severe corrosive of metal device; Conventional metallic heating element can not directly be used for heating solution; Normal adopt indirect heating or be placed on nichrome wire in the silica tube to the corrosive fluid heating, these methods, efficient is lower; Temperature rises slower, and effect is not ideal enough.

Summary of the invention

For solving the problems of the technologies described above, the utility model provides a kind of circuit card constant temperature etching machine, corrosive fluid is heated as heating unit with quartzy electrothermal film heating pipe.The corrosive fluid that silica tube inside constantly circulates under the motor-mount pump effect is realized the heating to cabinet internal corrosion liquid with this, has realized the reliable isolation of water with electricity simultaneously, has guaranteed the safety of etching machine work.

The above-mentioned purpose of the utility model is to realize through such technical scheme: circuit card constant temperature etching machine comprises cabinet, heating unit, electric water pump, etching tank, Rinsing Area; Be provided with etching tank and Rinsing Area in the cabinet, said etching tank is connected with heating unit, and heating unit connects electric water pump; Cabinet is equipped with temperature regulator, and the temperature regulator output terminal connects heating unit, and the temperature regulator input terminus is connected with detector unit, and detector unit is positioned at etching tank.

Said temperature regulator connects liquid crystal display LCD.

Said temperature regulator is provided with one-chip computer module, triac, optocoupler; Heating unit through the series connection triac after incoming transport 220V both ends of power; Said heating unit one end is connected the optocoupler output terminal with triac one end; The optocoupler input terminus connects one-chip computer module, and one-chip computer module connects liquid crystal display LCD and detector unit.

Said temperature regulator is provided with alarm module.

Said heating unit is quartzy electrothermal film heating pipe or ceramic electrothermal film heating pipe.

Said detector unit is TP DS18B20.

A kind of circuit card constant temperature of the utility model etching machine adopts quartzy electrothermal film heating pipe or ceramic electrothermal film heating pipe that corrosive fluid is heated, and has effectively realized the highly reliable isolation of electricity with water.The Electric radiant Heating Film that is coated at the silica tube outer wall is to through the heating of the corrosive fluid in the silica tube, and heating unit is simple in structure, and heating efficiency is high, because that the Electric radiant Heating Film heating power can be done is bigger, is easy to realize the rapid heating to corrosive fluid.Under the cooperation of the temperature regulator that is provided with one-chip computer module, this etching machine can be to the automatic adjusting control of corrosive fluid temperature.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

Fig. 1 is the utility model device front view;

Fig. 2 is the utility model device side view;

Fig. 3 is the utility model device circuit schematic diagram.

Wherein, among Fig. 1: 1 is cabinet, and 1-1 is a connected entrance under the etching machine, and 1-2 is a connected entrance on the etching machine.

2 is heating unit, and 2-1 is an Electric radiant Heating Film, and 2-2 is an electrode.

3 is electric water pump, and 4 is temperature regulator, and 4-1 is liquid crystal display LCD, and 4-2 is LED warning indication, and 4-3 is an alarming horn, and 4-4 is a temperature adjustment button, and 5 is TP.

Among Fig. 2: 6 is etching tank, and 7 is Rinsing Area.

Embodiment

Like Fig. 1, shown in Figure 2, circuit card constant temperature etching machine comprises cabinet 1, heating unit 2, electric water pump 3, etching tank 6, Rinsing Area 7; Be provided with etching tank 6 and Rinsing Area 7 in the cabinet 1, said etching tank 6 is connected with heating unit 2, and heating unit 2 connects electric water pump 3.Cabinet 1 is equipped with temperature regulator 4, and temperature regulator 4 output terminals connect heating unit 2, and temperature regulator 4 input terminuss are connected with detector unit 5, and detector unit 5 is positioned at etching tank 6.

Temperature regulator 4 connects liquid crystal display LCD.

Heating unit 2 is quartzy electrothermal film heating pipe or ceramic electrothermal film heating pipe.

Detector unit 5 is TP DS18B20.

Temperature regulator 4 is provided with one-chip computer module IC1, triac U2, optocoupler U1; Heating unit 2 through series connection triac U2 after incoming transport 220V both ends of power; Said heating unit 2 one ends are connected optocoupler U1 output terminal with triac U2 one end; Optocoupler U1 input terminus connects one-chip computer module IC1, and one-chip computer module IC1 connects liquid crystal display LCD4-1 and detector unit 5.

In etching tank 6; Be provided with two connected entrances up and down, be connected with the electric water pump 3 of heating unit 2 and anticorrosive type under the etching machine on connected entrance 1-1 and the etching machine between the connected entrance 1-2, during electric water pump 3 operations; Corrosive fluid in the etching tank 6 is under the effect of electric water pump 3; Reversingcurrent is realized cyclic motion from bottom to up through heating tube, and the heating tube energized just can be carried out rapid heating to the round-robin corrosive fluid.The output terminal of temperature regulator 4 is connected with heating tube two electrode 2-2, and input terminus is connected with TP, and TP passes to temperature regulator 4 to the temperature variation signal of sensing in real time, is used for temperature is controlled automatically.To the circuit card that etches, can put into Rinsing Area 7 from taking-up in the etching tank 6, in time circuit board surface is cleaned.

The heating tube level is installed in etching machine bottom, and during electric water pump 3 operations, the corrosive fluid that leaves 6 li of etching tanks in is under the effect of water pump, and reversingcurrent is through heating tube, realizes circulating from bottom to up.This has promoted cupric ion CU on the one hand ²⁺From the speed that circuit card is stripped from, when the heating tube energized, the heating tube temperature raises on the other hand; Circulation is realized rapid heating through the corrosive fluid in its pipe; Corrosive fluid in the corrosion case is under the round-robin effect, and temperature constantly rises, and has accelerated the corrosion progress of circuit card.

In addition, the too high meeting of the temperature of heating comes off the protective membrane on the circuit card, causes corrosion default even circuit card to scrap.Therefore, need be controlled at a reasonable range to temperature, this function is realized by temperature regulator 4, and is as shown in Figure 3.Temperature regulator 4 is connected with a TP IC2; TP IC2 is placed in the corrosion case and keeps contacting with the direct of corrosive fluid; And in time the signal of temperature variation is passed to temperature regulator 4, and in the temperature regulator 4 single chip machine controlling circuit being installed, the P1.0 mouth of one-chip computer module IC1 is connected with the data terminal of TP IC2; The P0 mouth is connected with liquid crystal display LCD4-1 with part P2 mouth; The P2.7 mouth of micro-chip is connected with optocoupler U1, and the other end of optocoupler is connected with triac U2, and this circuit is realized the control to the heating tube heated condition through silicon controlled rectifier.During work, micro-chip shows the real-time liquid crystal display LCD4-1 that passes through of temperature information that IC2 gathers on the one hand, on the one hand temperature information is judged; When temperature value reaches its ceiling temperature; Micro-chip P2.7 mouth output high level, optocoupler U1 is turned off, and silicon controlled rectifier U2 breaks off; The power supply of heating tube is cut off, and stops heating.When the temperature value that detects is lower value, micro-chip P2.7 mouth output low level, optocoupler U1 conducting, silicon controlled rectifier U2 opens, and power connection, heating tube begin heating again, and so circulation realizes the corrosive fluid temperature auto control.

The safety of using for guaranteeing, the utility model etching machine also is provided with warning device, when Heating temperature reaches when temperature is set; Micro-chip P3.3 mouth output 1Hz pulse signal; Make the LED warning indication 4-2 on the temperature regulator 4, temperature surpasses when the temperature certain limit is set, and one of micro-chip P2.1 mouth output is interrupted sound signal; Make that alarming horn 4-3 on the temperature regulator 4 can send " pouting ... pout ... " Alarm sound, cause danger out of control to prevent heating unit 2 faults.Micro-chip P3.4-P3.7 mouth is connected with 4 keyswitch: S1-S4, is used for being provided with temperature controlling range.

The circuit card that etches can take out from etching tank 6 and directly put into Rinsing Area 7, in time conveniently circuit board surface is carried out clean.

In the utility model device, heating tube adopts quartzy electrothermal film heating pipe RL as heating unit, this element at the quartz glass tube outer wall with special process spreading one deck Electric radiant Heating Film; Working voltage is the 220V AC power, and two electrode 2-2 are through silicon controlled rectifier U2 put in circuit, during the silicon controlled rectifier conducting; Power connection; Electric radiant Heating Film begins heating, and heating power can reach more than hundreds of watts, and the corrosive fluid that flows through in the silica tube will be by rapid heating; Add thermal control silicon controlled rectifier U2 and adopt BTA16-600B (16A-600V) triac; Optocoupler U1 adopts thyrister form optocoupler MOC3021, and detector unit IC2 adopts the intelligent TP DS18B20 of unibus, has simplified the circuit structure of temperature-control circuit greatly.Micro-chip IC1 adopts AT89S51, the LCD1602 type liquid-crystal display that display lcd adopts two row to show.

Claims

1. circuit card constant temperature etching machine comprises cabinet (1), heating unit (2), electric water pump (3), etching tank (6), Rinsing Area (7);

Be provided with etching tank (6) and Rinsing Area (7) in the cabinet (1), said etching tank (6) is connected with heating unit (2), and heating unit (2) connects electric water pump (3);

It is characterized in that: cabinet (1) is equipped with temperature regulator (4); Temperature regulator (4) output terminal connects heating unit (2); Temperature regulator (4) input terminus is connected with detector unit (5), and detector unit (5) is positioned at etching tank (6).

2. according to the said circuit card constant temperature of claim 1 etching machine, it is characterized in that: said temperature regulator (4) connects liquid crystal display LCD.

3. according to claim 1 or 2 said circuit card constant temperature etching machines; It is characterized in that: said temperature regulator (4) is provided with one-chip computer module (IC1), triac (U2), optocoupler (U1); Heating unit (2) is through series connection triac (U2) back incoming transport 220V both ends of power; Said heating unit (2) one ends are connected optocoupler (U1) output terminal with triac (U2) end; Optocoupler (U1) input terminus connects one-chip computer module (IC1), and one-chip computer module (IC1) connects liquid crystal display LCD and detector unit (5).

4. according to claim 1 or 2 said circuit card constant temperature etching machines, it is characterized in that: said temperature regulator (4) is provided with alarm module.

5. according to the said circuit card constant temperature of claim 1 etching machine, it is characterized in that: said heating unit (2) is quartzy electrothermal film heating pipe or ceramic electrothermal film heating pipe.

6. according to the said circuit card constant temperature of claim 1 etching machine, it is characterized in that: said detector unit (5) is TP DS18B20.