CN2458089Y

CN2458089Y - Deactivation tank

Info

Publication number: CN2458089Y
Application number: CN 00257012
Authority: CN
Inventors: 周天宝; 吴金坤; 谢春; 王金芳
Original assignee: Beitai Automobile Industry Co ltd Beijing
Current assignee: Beitai Automobile Industry Co ltd Beijing
Priority date: 2000-12-09
Filing date: 2000-12-09
Publication date: 2001-11-07
Anticipated expiration: 2010-12-09

Abstract

The utility model discloses a deactivation container, which carries out colored deactivation for work-pieces, wherein, the surfaces of which are coated with oxidized metal, so the surfaces of which are formed into deactivation protective film. The utility model is characterized in that the inner wall of the existing deactivation tank is arranged in parallel with more than two sets of air inlet pipes 2 along the depth direction thereof; the air inlet pipes 2 are distributed with air outlet holes 3; each set of the air inlet pipes 2 is externally connected with independent air control valves 4 respectively. The utility model controls the air input of each set of the air inlet pipes 2 through the air control valves 4 in order to adjust the stirring intensity and the flow speed of air to each zone of deactivation liquid in a tank body and reduces the color differences of the deactivation protective film of the upper surfaces and the lower surfaces of the work-pieces.

Description

Deactivation slot

The utility model relates to a kind of workpiece that the surface is coated with easy oxidation metal and carries out chromatic passivation, makes its surface form the employed passivation container of passivation protection film.

Because it is oxidized easily in air than the workpiece of active metal that the surface is coated with,, make its surface form the passivation protection film so will carry out chromatic passivation to plating the back workpiece; Passivation technology is a collection of workpiece to be divided into multilayer up and down place on the hanger, put into that deactivation slot carries out, existing paralysis facility to the workpiece passivation after, place on the hanger, there is big aberration in the surface of the work passivating film color of lower floor, this aberration is because last, the passivation reaction asynchronism(-nization) causes lower floor's workpiece in passivating solution, because the most advanced groove of lower floor's workpiece and go out groove at last always, the most laggard groove of upper strata workpiece and go out groove at first, on making, the passivation reaction time phase difference of lower floor's workpiece is about 10 seconds, and workpiece in passivating solution total passivation time greatly about about 30 seconds, the gap in 10 seconds is very big to the formation influence of passivating film, cause the workpiece passivating film color that is placed on the hanger upper strata shallow excessively, the workpiece passivating film color of lower floor is dark excessively, longer for hanger, the paralysis facility that deactivation slot is darker, after the passivation on, the aberration of lower floor's workpiece passivating film is particularly evident.

The purpose of this utility model is to provide a kind of and guarantees that the color of the upper and lower layer of hanger workpiece passivation rear surface passivating film do not have the deactivation slot of obvious aberration.

For achieving the above object, the utility model is taked following technical proposals: be provided with air inlet pipe more than two groups at existing deactivation slot inwall along its depth direction is parallel, be furnished with venthole on the air inlet pipe, every group of air inlet pipe be external separate control valve door respectively.

For the passivating solution that makes same section layer in the deactivation slot stirs fully, flow velocity is even, every group of air inlet pipe comprises that two rows place the pipeline of cell body opposed inner walls respectively, and with the venthole spaced set on row's air inlet pipe, the venthole on relative two row's air inlet pipe is split.

By such scheme as seen, the utility model is to utilize air that passivating solution is stirred, adjust the flowing velocity of different deep layer passivating solutions by the air inflow of controlling each air inlet pipe, the passivating solution convection velocity of cell body inner bottom part is the slowest, more up convection velocity is fast more, hanger lower floor workpiece is positioned at the slower zone of passivating solution convection velocity, just prolonged the required time of this surface of the work film forming, equally, hanger upper strata workpiece is positioned at passivating solution convection velocity zone faster, just shortened the required time of this surface of the work film forming, different in flow rate by different deep layer passivating solutions in the control cell body remedies on the hanger, the different difference of lower floor's workpiece passivation film formation time, that is to say, for relatively short upper strata workpiece of time in passivating solution, can improve the passivating solution flowing velocity of this layer by the utility model, passivation reaction is accelerated relatively; And, can make the passivating solution flowing velocity reduction even static relatively of this layer for relatively long lower floor's workpiece of time in passivating solution, passivation reaction is slowed down relatively.

Description of drawings:

Fig. 1 is the utility model structure principle chart;

Fig. 2 is the vertical view of Fig. 1.

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing:

As shown in Figure 1, at existing deactivation slot cell body 1 inwall along its depth direction three groups of air inlet pipe 2 that be arranged in parallel, air inlet pipe 2 can adopt the ABS material, pipeline is fixed on the inwall of cell body 1 by support, spacing between the two adjacent groups air inlet pipe is 500-800mm, in conjunction with shown in Figure 2, air inlet pipe 2 is made up of the U-shaped pipe that a straight tube and that stretches out cell body 1 is horizontally placed in the cell body 1, two pipes intersect at the root of U-shaped pipe, on the U-shaped pipe of air inlet pipe 2, have the relative venthole 3 of two round eyes, spacing with adjacent two ventholes 3 of row is the 80-100mm spaced set, every group of external separate control valve door 4 of air inlet pipe difference, respectively organize the air inlet amount of air inlet pipe 2 by by-pass valve control 4 controls and adjust the flowing velocity of air, make on the hanger the stirring intensity and the passivating solution of each regional passivating solution in the cell body, lower floor's surface of the work passivating film color and luster reaches unanimity.

Claims

1, deactivation slot is characterized in that: be provided with air inlet pipe more than two groups at the cell body inwall along its depth direction is parallel, be furnished with venthole on the air inlet pipe, be connected to separate control valve door respectively in every group of air inlet pipe.

2, deactivation slot according to claim 1 is characterized in that: every group of air inlet pipe comprises that two rows place the pipeline of cell body opposed inner walls respectively, and with the venthole spaced set on row's air inlet pipe, the venthole on relative two row's air inlet pipe is relative.

3, deactivation slot according to claim 1 is characterized in that: the spacing between the two adjacent groups air inlet pipe is 500-800mm.

4, deactivation slot according to claim 1 and 2 is characterized in that: the spacing with adjacent venthole on row's air inlet pipe is 80-100mm.