JPS63188005A - Method of molding tabular body with irregularity - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for molding a plate-like body having unevenness, and particularly to a molding method employing electrophoresis. Specifically, the present invention relates to a molding method suitable for use as a method for manufacturing large-sized ceramic plates having irregularities.

[Prior Art] A method using electrophoresis is known as a method for producing large ceramic plates (Japanese Patent Publication No. 50761/1983).

A molding method employing this known electrophoresis method will be explained with reference to FIG. Reference numerals 1.2 and 1.2 denote rolls whose at least surfaces are made of a conductive material, and whose axes are horizontal and parallel to each other, and which are disposed at a predetermined interval on the circumferential surface of the roll 1.2. these rolls 1
A triangular cathode 3 convex downward is provided above the minimum gap between the rolls 1 and 2, and the side surface of the portion between the rolls 1 and 2 where this cathode 3 is disposed is not shown in the figure. Surrounded by a pair of plates, it is possible to collect the suspension above the minimum gap between the rolls 1.2. The cathode 3 includes a plate portion 3a curved in an arc shape along the circumferential surface of the roll 1.2, and
It has a side plate part 3b that connects the two, and a suspension outlet 4 is provided in this side plate part 3b. Reference numeral 5 designates an inlet for introducing the suspension between these rolls 1.2. Note that a conveyor 6 is installed below the roll 2.

In the forming apparatus having such a configuration, the roll 1 is
．． 2, a voltage is applied between the cathode 3 and the roll 1.2, and the roll 1.2 is slowly rotated at the same speed, the suspended particles in the suspension S are It is deposited in a layer on the surface of the roll 1.2 by electrophoresis. This layered deposit is fed into the minimum gap of the roll 1.2 as the roll rotates 1.20 times, and is overlapped to form a single sheet.
After passing through the minimum gap, it is peeled off from the surface of the roll 2,
The molded plate 7 is sent to the next process on the conveyor 6.

[Problems to be solved by the invention] According to this molding method that employs the known electrophoresis method, even large ceramic plates can be manufactured continuously, but the resulting ceramic plates have problems on both sides. It becomes smooth.

However, the texture and appearance of large porcelain ware resembles that of a steel plate coated with paint, and the unique texture and appearance of ceramics.
Easy to lose appearance.

[Means for Solving the Problems] The method for forming a plate-like body having unevenness according to the present invention is a method for forming a plate-like body from a suspension using a known electrophoresis method, in which a plate-like body is formed in close contact with one roll. In this state, a belt having a large number of holes passing through the belt in the thickness direction is passed through the suspension at the same speed as the circumferential speed of the roll.

Further, in the molding method of the present invention, a gearing roll having corrugations is then brought into contact with the molded product to form corrugations on the surface of the molded product.

[Function] In the plate forming method of the present invention, the charged particles in the suspension are attached to the roll surface by electrophoresis, but in the present invention, the surface of one roll is a belt with openings. Since the belt is covered, the particles in the suspension will adhere only to the openings of this belt on the one roll.

Therefore, in a molded plate produced by bonding the deposits of both rolls together, an uneven shape in which the deposits in the opening portion are raised is formed on one plate surface.

Furthermore, in the molding method of the present invention, by bringing the molded article with the uneven shape formed on one plate surface into contact with a gearing roll, further pleat-like unevenness is formed on the one plate surface, so that the uneven shape is further formed on the one plate surface. It is possible to form intricate or minute uneven shapes.

[Embodiments] The present invention will be explained in more detail below with reference to embodiments shown in the drawings.

FIG. 1 is a longitudinal sectional view illustrating an embodiment of the molding method of the present invention. In FIG. 1, the same parts as in the conventional example shown in FIG. ing.

A belt 8 is placed around one of the rolls 2. In this embodiment, this belt 8 is stretched between a drive roll 9 placed behind the roll 2 and the roll 2, and the drive roll 9 is driven to rotate in the same direction at the same circumferential speed as the roll 2. It is considered possible. This belt 8 has a large number of openings 10 passing through it in its thickness direction.

Note that reference numeral 11 is a cleaning device for the circumferential surface of the roll 1.2, which sprays clean water onto the circumferential surface of the roll 1.2 to wash away particles remaining on the circumferential surface of the roll 1.2. be able to. Further, reference numeral 12 is a coating device for coating a mold release agent on the circumferential surface of the roll 1.2, and a roll coater or the like is employed, for example. Further, reference numeral 13 is a cleaning device for the belt 8, which sprays clean water onto the belt 8 that has been separated from the roll 2, and can wash off particles adhering to the belt 8.

Thus, the suspension is continuously introduced from the inlet 5, and the suspension S is placed above the minimum gap between the rolls 1.2.
is stored at a predetermined level. When a voltage is applied between the roll 1.2 and the cathode 3, the roll 1.2 is rotated at the same circumferential speed, and the belt 8 is rotated at the same circumferential speed as the roll 2, this suspension is caused. Particles in the suspension S adhere to the surface of the roll 1.2. Particles adhere to the surface of the roll 1 in a uniform thickness, but on the roll 2, the particles adhere only to the opening 10 of the belt 8. The deposits on the circumferential surface of the rolls 1.2 are overlapped when passing through the minimum gap between the rolls 1.2, and thus form a plate-shaped molded product 14 with unevenness formed on one plate surface. Become. This plate-shaped molded product 14 is peeled off from the roll 1.2 and sent to the next process on the conveyor 6. For example, if the plate-shaped molded product is a clay molded product, it is made into a large ceramic plate through various steps such as drying, glazing, and firing.

As described above, according to the method of the present invention, a large plate-shaped molded product having irregularities on one plate surface can be continuously manufactured.

Note that the opening 10 formed in the belt 8 may have any shape or arrangement as long as it passes through the belt 8 in the thickness direction. FIG. 2 is a plan view showing an example of the shape of the opening 10 (
Figure 1! I-line arrow view). FIG. 2(a) shows rectangular openings arranged regularly. FIG. 2(b) shows a belt in which a long rectangular opening is formed in the width direction of the belt. Second
Figure (C) shows circular openings arranged in a staggered arrangement. Of course, in the present invention, the apertures can be arranged in various shapes other than those shown in FIG. 2 or in accordance with various arrangement patterns, and the aperture arrangement may be completely random.

FIG. 3 is a sectional view illustrating the second method of the present invention. In FIG. 3, a smooth guide roll 15 and a gearing roll 16 whose circumferential surface is provided with minute irregularities in the form of pleats are placed below the roll 1.2, with their axial centers horizontal and It is installed at a predetermined interval between both circumferential surfaces. In this method of FIG. 3, roll 1.
The uneven surface of the plate-like molded product 14 formed in step 2 further comes into contact with the gearing roll 16, and fine pleat-like unevenness is imprinted thereon. As a result, a plate-shaped molded product 17 whose surface is extremely varied is provided. The rest of the configuration is the same as that in FIG. 1, so the same parts as in FIG. 1 are given the same reference numerals and their explanation will be omitted.

FIG. 4 is a longitudinal sectional view of a main part explaining a different embodiment method of the present invention. That is, in the methods shown in FIGS. 1 and 3, the belt 8 was stretched between the rolls 2 and 9, but
In the illustrated embodiment, the belt 8A is fitted onto the roll 2. When the belt 8A is fitted into a ring shape in this manner, it is preferable to thoroughly clean the opening 10 of the belt 8A and the circumferential surface of the drum 2 to ensure that any adhered particle residue is removed.

The rest of the configuration in FIG. 4 is the same as that in FIG. 1, so the same members are given the same reference numerals and their explanations will be omitted.

Although a rubber belt is used in the above embodiment, other materials may be used as long as they are non-conductive. Although this belt is not particularly limited, a belt having a thickness of about 1 to 10 mm, particularly about 2 to 8 mm, is suitable.

Further, it is preferable that the inner wall surface of the opening 10 of this belt 8.8A is substantially perpendicular to the curved surface of the roll 2.

[Effects of the Invention] As described above, according to the present invention, a plate-like body having irregularities can be continuously manufactured. Therefore, when manufacturing a large diaphragm using the method of the present invention, it is possible to manufacture a large porcelain plate with unevenness formed on the - side plate surface, rich in the texture unique to ceramics, and full of high quality and luxury. Can be done. Further, it is also possible to form the material so as to have an extremely fine pleated pattern as the uneven pattern.

Pressing or other methods can be considered as a method for forming irregularities on the surface of a molded product of plastic material, but if this pressing method is applied to the method of forming irregularities on the surface of the diaphragm base material, stress will be applied locally, resulting in This may cause cracks, etc. According to the method of the present invention, such local stress is not applied to the molded product, and no cracks or the like occur, resulting in extremely high productivity.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view explaining the method of the present invention, FIG. 2 is a plan view of the main part of the belt, FIG. 3 is a sectional view explaining another method of the present invention, and FIG. 4 is a still another method. A sectional view of the main parts to be explained,
FIG. 5 is a sectional view illustrating a conventional method. 1.2... Roll, 3... Cathode, 6... Conveyor, 8... Belt, 10... Opening, 16... Gearing roll.

Claims (2)

[Claims] (1) A suspension is supplied between a pair of rolls that are placed opposite each other with their axes horizontal and parallel to each other, and the suspended particles are deposited in a layer on the circumferential surface of the roll by electrophoresis, and then this layered material In a forming method in which a plate-shaped product is obtained by peeling the suspension from the circumferential surface of the roll, a belt having a large number of openings penetrating through the thickness is tightly attached to one of the rolls, and the suspension is peeled off from the circumferential surface of the roll at the same speed as the circumferential speed of the roll. 1. A method for forming a plate-shaped object having an unevenness, characterized in that unevenness following the openings is formed on one plate surface of the plate-shaped object by passing the liquid through the liquid. (2) A suspension is supplied between a pair of rolls that are placed opposite each other with their axes horizontal and parallel to each other, and the suspended particles are deposited in a layer on the circumferential surface of the roll by electrophoresis, and then this layered material In a forming method in which a plate-shaped product is obtained by peeling the suspension from the circumferential surface of the roll, a belt having a large number of openings penetrating through the thickness is tightly attached to one of the rolls, and the suspension is peeled off from the circumferential surface of the roll at the same speed as the circumferential speed of the roll. By passing the liquid through the liquid, unevenness following the openings is formed on one plate surface of the plate-shaped molded product, and then, by further contacting the one plate surface with a gathering roll having pleated unevenness. A method for forming a plate-like body having unevenness, the method comprising forming pleat-like unevenness on the one surface.