JPH053263Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a paint drying oven for drying paint applied to various objects such as automobile bodies and casings of electrical products. This invention relates to a structure for preventing condensed tar from dripping in a paint drying oven, which is equipped with a gutter that catches the condensed tar flowing down from the wall surface.

[Conventional technology]

The gutter that catches the flow of resin condensed on the furnace wall was originally provided for the purpose of preventing the condensed resin from dripping onto the dried material.
Generally, it is installed at the upper periphery of the opening through which dried materials are carried into and out of the furnace, but in the past, no measures were taken to prevent tar condensation on the outer surface of the gutter itself ( (Unable to provide references).

[Problem that the invention attempts to solve]

However, there was a problem in that tar condensed on the outer surface of the gutter dripped onto the dried product, resulting in defective coated products.

Moreover, this also posed the problem of requiring frequent maintenance to remove resin condensed on the outer surface of the gutter.

An object of the present invention is to effectively prevent tar from condensing on the outer surface of the gutter that receives the condensed tar flowing down.

[Means for solving problems]

The characteristic structure of the condensed tar dripping prevention structure of the paint drying oven according to the present invention is that a water-containing tar condensation prevention material is attached to the outer surface of the gutter that catches the falling tar that has condensed on the furnace wall. Its functions and effects are as follows.

[Effect]

In other words, as a result of research on resin condensation, the process by which resin condensation occurs is that first, moisture in the furnace condenses to form a wet surface, and resin condensation occurs when resin components dissolve into the condensed water on the wet surface. It turned out to be.

Therefore, if a water-retaining material is attached to the outer surface of the gutter, the formation of a wet surface is avoided due to its water-retaining action, and condensation of resin components is effectively prevented.

[Effect of idea]

As a result, it has become possible to avoid the occurrence of defective painted products caused by condensed tar dripping on the outer surface of the gutter, resulting in a paint drying oven that is superior in terms of processing quality and processing efficiency. It has also become possible to reduce maintenance costs by reducing the maintenance required to remove condensed tar.

Incidentally, it is possible to eliminate the need for a gutter by attaching water-containing tar condensation prevention material to almost the entire surface of the furnace wall, but this would be a major improvement and would be disadvantageous in terms of equipment costs, as well as prevent the attached tar condensation. Replacement of the prevention material requires a large amount of expense and labor.

In this regard, according to the present invention in which resin condensation prevention material is attached to the outer surface of the gutter, there is no particular need to attach resin condensation prevention material to the entire surface of the furnace wall surface, so the improvement is easy and it is advantageous in terms of equipment cost. Moreover, even when replacing the tar condensation prevention material, the replacement maintenance is easy.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 2 shows a coating drying oven for drying paint applied to an object to be coated, and is provided with a hot air circulation path 3 for circulating hot air generated by a hot air generator 1 into a tunnel-shaped furnace body 2. , dried product A
A conveyor device 4 is provided for passing through the furnace body.

As shown in FIGS. 2 and 3, the front wall 5 and rear wall 6 of the furnace body 2, as well as the front partition wall 5A and rear partition wall 6A provided close to them, are subjected to drying treatment. An opening 7 is formed for carrying the material A into and out of the furnace body 2, and a gutter 8 is formed at the upper edge of the opening 7 to catch the resin condensed on each wall surface.
is provided.

In other words, in the front wall 5, the rear wall 6, and the front partition wall 5A and rear partition wall 6A adjacent to them, there is a large amount of tar condensation on the wall surfaces because of the openings 7. 8 to catch the flowing condensed tar, it is possible to prevent the condensed tar from dripping onto the dried material A that is passing through the opening 7.

The gutter 8 is given a slope θ such that the condensed resin received flows down to both outside sides of the width of the opening 7, and the condensed resin that is guided by the gutter 8 and flows down to both outside sides of the width of the opening 7 is appropriately disposed of. It is designed to be collected in a collection container.

As shown in FIG. 1, a slate plate 9 is attached to the lower surface of the outer surface of the gutter 8, where there is a high possibility of resin condensation on the outer surface, as a water-containing resin condensation prevention material.

In other words, considering that the wet surface formed by the condensation of moisture in the furnace is the cause of tar condensation, a straight plate 9 is attached to the outer surface of the gutter 8 where there is a possibility of tar condensation. The water-containing action of 9 prevents the formation of a wet surface itself and prevents condensation of resin on the outer surface of the gutter 9, and as a result, the resin condensed on the outer surface of the gutter 8 drips onto the dried material A passing through the opening 7. It is designed to prevent any occurrence that may lead to the production of defective products. 9A in the figure is a glass wool material for heat insulation interposed between the outer surface of the gutter 8 and the slate plate 9.

The slate plate 9 used as a tar condensation prevention material is attached so as to be freely replaceable, and its attachment structure is as follows:
A slate plate 9 is integrally formed over almost the entire length of the gutter 8.
The above-mentioned is fixed to the gutter 8 by a mounting bracket 10 on the outside of the passage width d of the material A to be dried.

That is, by arranging the mounting bracket 10 outside the path width d of the dried material passage system, resin condensed on the outer surface of the mounting bracket 10 is prevented from dripping onto the dried material A.

The slate plate 9 is replaced when the slate plate 9 deteriorates or when its moisture content becomes excessive and a wet surface is formed on the outer surface of the slate plate. Board gutter 8
As a result of experiments carried out by attaching it to the outside surface of the slate board, even after 3 weeks of use, only slight discoloration occurred on the surface of the slate board, but no condensation of resin dripped, and replacement maintenance was unnecessary for a long period of time. It turns out that there is something.

Incidentally, if a water-containing tar condensation prevention material such as a slate board was not attached, it would be necessary to wipe off the condensed tar on the outer surface of the gutter 8 at least once a day.

[Another example]

Next, another embodiment of the present invention will be described.

As the tar condensation prevention material 9 attached to the outer surface of the gutter 8, various materials can be used as long as it is water-containing, such as a slate board or asbestos.

The specific structure of the gutter 8 and the mounting position within the furnace can be changed in various ways, and the specific structure in which the tar condensation prevention material 9 is attached to the outer surface of the gutter 8 can also be improved in various ways.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is an enlarged sectional view of the main parts, Fig. 2 is an overall configuration diagram of the drying oven, and Fig. 3 is an enlarged sectional view of the main part.
The figure shows the entrance and exit section of the drying oven. 5, 6... Furnace wall, 8... Gutter, 9... Tar condensation prevention material.

Claims (1)

[Scope of utility model registration request] A drying oven for painting which is provided with a gutter 8 that catches the flow of tar condensed on the walls of the furnace walls 5 and 6, and a tar condensation prevention material 9 having water-containing properties is attached to the outer surface of the gutter 8. Structure that prevents condensed resin from dripping in the drying oven.