JPH0433879B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vertically suspended surface treatment apparatus that can be applied to various surface treatments such as anodizing treatment, electrolytic coloring treatment, and electrophoretic painting treatment of aluminum shapes and the like.

[Conventional technology]

For example, aluminum profiles used for various building materials are subjected to pretreatments such as degreasing, etching, and smut removal, and then subjected to a series of treatments such as anodizing, electrolytic coloring, and electrophoretic painting.

In this treatment process, a large number of shapes are sequentially immersed in each treatment tank while being held in a transport frame.
Further, it is transported to a processing tank for the next step by a transport frame.

In such surface treatment, a plurality of materials to be treated are usually suspended from one transport frame in the longitudinal direction and transported. From the perspective of mass processing, the larger the amount of hanging, the better, but if the hanging interval of the treated material is narrowed, the film thickness and coloring will become uneven, making it impossible to maintain a constant quality, so there is a certain limit.

In order to solve this problem, a racking method in which a plurality of materials to be treated are hung in a staggered manner at predetermined intervals along the longitudinal direction on both sides of one transport frame was proposed in Japanese Patent Publication No. 59-33197. Proposed in the gazette.

[Problem that the invention seeks to solve]

In recent years, in response to the diversification of user needs regarding color tones of surface treatment products, surface treatment lines are also becoming smaller in lot size and more multi-colored, but this can reduce the capacity of existing lines. is unavoidable. In other words, with conventional equipment, it is virtually impossible to electrolytically color, for example, two types of colors at the same time using one surface treatment bath.
It may be necessary to use two electrolytic coloring baths corresponding to the desired color tone of each profile, or to electrolytically color a series of profiles to one shade before electrolytically coloring another profile to a different shade. If we try to accommodate the increasing number of colors in products, productivity will drop. In addition, in response to smaller lots, for example, different shapes can be framed in the same transport frame, or shapes of different lengths can be framed in the same transport frame, regardless of whether they are the same or different shapes. When electrolytic coloring is performed, the spreadability and coloring progress are uneven, making it difficult to obtain a colored film of constant quality.

According to the racking method described in Japanese Patent Publication No. 59-33197, it is possible to increase the amount of framing and improve the efficiency of the surface treatment process, but it is not a solution to the problems described above. However, it is difficult to meet the demands for smaller lots and more colors.

Therefore, an object of the present invention is to provide a vertically suspended surface that can fully meet the needs of small lots and multicolor production without the above-mentioned problems, and that can provide products of stable quality without reducing productivity. The purpose of this invention is to provide a processing device.

[Means and actions for solving problems]

The vertically suspended surface treatment apparatus of the present invention includes at least two counter electrodes in the processing tank, and two transport frames for suspending and transporting the material to be treated between each counter electrode. A plurality of gripping devices are provided at the lower part of the transport frame at predetermined intervals along the longitudinal direction and in a staggered manner between the transport frames to suspend the material to be processed. It is something.

In this way, by providing at least two transport frames per processing tank and suspending the material to be treated in a staggered manner between each transport frame, the amount of framing can be increased and productivity can be increased. In addition, different voltages can be applied to each transport frame by separate power supplies or by switching the power supply wiring, and different colored coatings can be applied to the workpieces suspended from each transport frame.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments shown in the drawings.

1 and 2 show a state in which a workpiece 2 is suspended from two parallel transport frames 1a and 1b according to the present invention. Each transport frame 1a, 1b
At the bottom of the frame, gripping devices 3 are arranged at regular intervals along the longitudinal direction and in a staggered manner between the respective transport frames, that is, in a staggered manner on each of the transport frames 1a and 1b. installed. The materials to be processed 2 are held and suspended by the gripping device 3, and are therefore suspended from each of the transport frames 1a and 1b in a staggered manner. The material is immersed in each treatment tank and subjected to surface treatment.

This type of vertically suspended surface treatment can be applied to various treatments such as anodizing, electrolytic coloring, electrodeposition painting, and plating, but the electrolytic coloring treatment of aluminum shapes shown in Figures 3 to 5 is an example. This will be explained in detail.

In FIG. 3, reference numeral 4 denotes an electrolytic cell filled with an electrolytic solution 5, and an overflow gutter 6 is provided at the upper part of both side walls of the electrolytic cell 4. In addition, electrolytic tank 4
Inside there are two counter electrodes (aluminum cathode) on both sides.
7a and 7b are arranged, and two transport frames (electrolytic frames) 1a and 1b are arranged between them. A gripping device 3 is attached to the lower part of each transport frame 1a, 1b in the state shown in FIG. They are held between the lever 9 and the lever 9, and are suspended in a staggered arrangement as shown in FIG. 2, and immersed in the electrolytic solution 5. As the gripping device, various conventionally known devices can be used. Frame portion 1 of one transport frame 1a and counter electrode 7a
0a is connected to a power source A, and the other transport frame 1b and the frame portion 10b of the counter electrode 7b are connected to a power source B.

Therefore, desired electrolytic coloring can be obtained by varying the energizing time, voltage, energizing pattern, etc. of the power supplies A and B. For example, the present applicant first determined the relationship between coloring time and current density for each color tone, that is, the current density pattern, and controlled the current density pattern according to the desired color tone, thereby establishing one standard. We have developed an electrolytic coloring method that can uniformly color a wide range of colors using an electrolytic solution, and have already applied for patents (Japanese Patent Laid-Open Nos. 127897-1989,
127898, Japanese Patent Application No. 62-122598), such an electrolytic coloring method can be advantageously applied to the aluminum profile 2 attached to each of the conveying frames 1a and 1b, and the need for multicoloring can be met. can be adequately addressed.

For example, the shapes suspended from the transport frame 1a can be electrolytically colored silver, and the shapes suspended from the transport frame 1b can be electrolytically colored bronze, or bronze and black. . Note that by switching the power supply wiring, the power supplies A and B can be combined into one power supply, thereby making it possible to further expand the range of selection.

Each of the transport frames 1a and 1b can be provided movably in a direction toward each of the opposing counter electrodes 7a and 7b. As a result, each transport frame 1
By movably adjusting the distance between a and 1b according to the size, shape, etc. of the aluminum profile, and by movably adjusting the distance between the poles and the counter electrode, the optimum voltage can be obtained when applying the set current density. You can also do it like this.

In addition, not only the transport frames 1a and 1b but also the counter electrode 7
A and 7b themselves can be made movable to facilitate adjustment, and the counter electrode surface can be partially insulated to adjust the pole ratio (the ratio of the counter electrode area to the area of the material to be treated) according to the amount of frame attached. , it is possible to stabilize the electrolytic conditions. In electrolytic coloring, the higher the voltage, the larger the non-Falladian current and the greater the variation in the degree of coloring.However, by moving the movable counter electrode in the electrolyte and narrowing the distance between the electrodes, the voltage can be lowered. (15V or less) can also be achieved. The area of the counter electrode can be adjusted by using, for example, a counter electrode in the form of a split plate, a round bar, a pipe, a shape, or the like.

By using the two conveyor frames as described above, it is possible to handle small lots of glossy, matte, and color coatings in subsequent painting processes such as electrocoating, making it possible to handle small lots. It can be made into an ideal specification as a countermeasure line for multicolor and multicolor.

In addition, when the processing apparatus of the present invention is applied to anodizing treatment or electrodeposition coating, it is also possible to form anodized films or paint films with different thicknesses on the treated materials suspended from each transport frame. .

4 shows the power supply wiring when applying electrolytic coloring of the same color to the treated materials suspended from each transport frame using the apparatus shown in Fig. 3, and shows the power supply wiring applied to each transport frame 1a, 1b. The voltage from C is kept constant.

Although the case where two transport frames are used has been described above, it is also possible to use a larger number of transport frames. For example, FIG. 5 shows a case where four conveyance frames are used, two conveyance frames 1a and 1b arranged between two counter electrodes 7a and 7b, and two
Two conveyance frames 1c and 1d arranged between the two counter electrodes 7c and 7d are arranged as a set, respectively,
Each set of transport frames 1a, 1b, 1c, and 1d is wired with power as shown in Figure 4, and the material to be treated suspended from one set of transport frames is electrolytically colored in the same color. is electrolytically colored in a different color tone from the other sets of treated materials. Alternatively, as shown in FIG. 3, each of the four conveyor frames 1a, 1b, 1c, 1d and each frame portion 10a, 10b, 10c, 10d of each counter electrode 7a, 7b, 7c, 7d opposing thereto. It is also possible to connect the two transport frames to separate power supplies so that each of the materials to be treated suspended from each transport frame pair can be electrolytically colored in a different color tone.

〔Effect of the invention〕

As described above, according to the present invention, at least two conveyors are provided per treatment tank, and surface treatment is performed while the materials to be treated are suspended in a staggered manner between the respective conveyor frames. In addition to increasing the amount of frames applied without adversely affecting the uniformity of film thickness and coloring, it is also possible to apply different voltages to each transport frame using separate power supplies or by switching the power supply wiring, It is also possible to apply a voltage, and it is possible to apply different colored films or the same colored film to the materials to be treated suspended from each transport frame. Therefore, it is possible to fully meet the needs for smaller lots and more colors, and to provide products of stable quality without reducing productivity.

Further, according to an embodiment of the present invention, by making each transport frame (or further counter electrode) movable in the lateral direction, that is, in the direction toward each opposing counter pole (or each transport frame), In addition to adjusting the distance between each material to be treated according to the size and shape of the material, the distance between the material to be treated and the corresponding counter electrode can be adjusted to obtain the optimal voltage when applying the set current density. It is possible to obtain a film with stable quality in terms of degree of coloring, uniformity, etc., even in the case of different types of racking.

[Brief explanation of drawings]

FIG. 1 is a partial side view showing a state in which a material to be processed is suspended from a conveyance frame according to the present invention, FIG. 2 is a view taken along the line - arrow in FIG. FIG. 4 is a partial longitudinal cross-sectional view showing one embodiment of the electrolytic coloring treatment apparatus constructed, FIG. 4 is a partial longitudinal cross-sectional view showing another embodiment, and FIG. 5 is a partial longitudinal cross-sectional view showing still another embodiment. . 1a, 1b, 1c, 1d are transport frames, 2 is a material to be processed, 3 is a gripping device, 4 is an electrolytic cell, 5 is an electrolytic solution,
A, B, C, C ₁ and C ₂ are power supplies.

Claims (1)

[Scope of Claims] 1. At least two counter electrodes are provided in the processing tank, and two transport frames for suspending and transporting the material to be treated are arranged between each counter electrode, and each transport frame has a A vertically suspended surface treatment system, characterized in that a plurality of gripping devices are provided at the bottom for suspending the treated material at predetermined intervals along the longitudinal direction and in a staggered manner between each conveyor. Device. 2. The device according to claim 1, wherein each transport frame is movably arranged relative to each opposing counter electrode. 3. Claims 1 or 2, in which each counter electrode is movably arranged with respect to each corresponding conveyance frame.
Equipment described in Section.