JPS603038B2 - Manufacturing method of glazed ceramic plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing pongee ceramic boards useful for the interior and exterior of buildings, paving, decoration, etc.

Conventionally, the porcelain plate was made by molding powder or neck grain powder using a compression molding machine to form the base of the porcelain plate, and then spraying pure water suspension onto the base of the side porcelain plate. It is then manufactured by firing it in a kiln. However, with this method, water penetrates into the base of the pongee board from the pongee surface during pongee making, causing the pongee board to crack during drying and firing. It is said to be difficult to produce shiitake plates with high yield. In addition, there are many other problems, such as the occurrence of dust caused by the molding of the ceramic plate base and the application of citron, and the generation of pollution by wastewater after washing away the scattered citron, and the installation of devices to prevent this. Therefore, in recent years, a new method has been developed, in which a pure medicinal sheet is obtained by mixing yuzu medicine and woven materials, or by coating or impregnating a sheet with yuzu medicine, and then firing the pongee medicine sheet together with a ceramic plate base. How to obtain ceramic plates by
6, Hakama Sekisho 48-89712, Japanese Patent Publication No. 49-13340
JP-A No. 52-27406, etc.) have been proposed.

According to these methods, the drawbacks of the conventional methods for manufacturing finely milled ceramic plates described above can be solved to some extent. However, the method for manufacturing pongee chest porcelain plates described above (including the conventional method for manufacturing pongee ceramic porcelain plates) is a batch-type manufacturing method in which a flat plate press machine is used to mold the chest porcelain base material. Therefore, production efficiency is poor,
In addition, if sufficient deaeration is not performed during molding, complete molding will not be possible, resulting in various defects in the ceramic plate body and the molded parts.

Furthermore, as the size of the ceramic plate base increases, high pressure is required, which makes it unavoidable that the press machine becomes larger. Therefore, in the present invention, we investigated a method to increase the production efficiency of pongee ceramic boards and to perform degassing and molding continuously without any problems when molding pongee ceramic board bases.

As a result, we have discovered a method for molding ceramic plate bases using a roll-type press instead of the conventional batch-type molding method using a flat-plate press. In order to continuously manufacture pongee ceramic plates using a roll-type press machine in a highly productive manner, a sheet for chest magnet plates and a citron sheet are used. 'It is not possible to obtain a good pongee ceramic board by simply stacking pongee medicine sheets with different properties, pressure-molding them, and then firing them. By stacking the sheets and firing the obtained pongee pongee board base under specific conditions using a roll press machine, we can continuously produce high-quality pongee pongee board in a highly productive manner. It has become clear that it can be manufactured.

That is, the present invention provides at least one sheet for a ceramic plate having a water content of 50% or less, which is composed of 95 parts by weight of Hi-Shi 7 and 5 parts by weight of fiber material 3, and 1 to 95 parts by weight of Pure Medicine 7. 95
Parts by weight and one or more citron sheets with a water content of 50% or less, which are made of parts by weight to 5 parts by weight of the fiber material 3, are stacked together and continuously pressed together using a roll press machine under a pressure of 100 x 9' or more. This method of manufacturing a ceramic board is characterized by forming a ceramic board base, cutting the base into a desired size as necessary, and then firing it.

In the present invention, the sheet for ceramic plates and the pongee sheet may be paper-made by adding Hi-shi or Yu-yaku at the paper-making stage, or they may be made by electrochemically adsorbing No-i-shi or Yu-yaku on the fiber material, etc. The sheet may be coated with or impregnated with Hi-shi or Yūyaku on the sheet obtained by further sanding, but in either case, the final crimping process involves molding the ceramic plate sheet and the pure chemical sheet into one piece. Moisture content at stage is 50%
The reason for this is that if the moisture content is 50% or more, it may cause problems in forming the pongee ceramic board base, and furthermore, cracks may occur in the pongee ceramic board after firing.

In the final crimping stage of integrally molding the ceramic plate sheet and the pongee medicine sheet, it is necessary to reduce the moisture content of both the side plate sheet and the sleeve medicine sheet to 50% or less. It is not necessarily necessary to specify the moisture content of the medical sheet or the pongee medicine sheet to be 50% or less, and even if the moisture content is high, 50% or more, by using a dehydration device as shown in Figure 1, It is possible to adjust the moisture content to 50% or less for molding. That is, the water content is 50
% or more of ceramic plate sheet or pongee medicine sheet 1 is passed between rotating belts 2, 2' to 7, 7, which are made of an elastic substrate 8 such as felt or asbestos, and which has water absorbing properties.
Let it pass while applying pressure with '. At this time, between the first pressure rolls 2, 2' and the seventh pressure rolls 7, 7', the first pressure is The pressure is gradually increased from the pressure rolls 2, 2' to the seventh pressure rolls 7, 7'. As a result, the elastic, water-absorbent substrate 8 such as felt or asbestos is compressed into the ceramic sheet or pongee sheet 1 squeezed out by the pressure rolls 2, 2' to 7, 7'.
By absorbing the moisture content of the sheet and absorbing the linear pressure stress caused by the pressure roll, the moisture content can be adjusted to 50% or less without damaging the shape or surface of the ceramic sheet or pongee sheet 1. be. The moisture content in the present invention is based on a wet basis, and is the value obtained by dividing the moisture by the total weight including moisture and multiplying it by 100. In the present invention, the amount of fiber material in the material or citron is also an important factor in manufacturing the pongee ceramic board, and if the amount of fiber material is more than necessary, the resulting There is a problem with dimensional stability, and on the other hand, if the amount of fiber material is less than necessary, the handling strength will decrease, making it difficult to form a continuous pongee ceramic plate base using a roll press machine. - 3 to 5 parts by weight for 7 to 95 parts by weight of Citrus or Cucumber 7.

As for the fiber material, cellulose pulp can be used like normal paper, but if there are any fiber materials that can be used in wet paper making, such as inorganic fibers and heat-melt synthetic fibers (including heat-melt synthetic pulp), these can be used. However, from the viewpoint of improving the compressibility during thermocompression bonding, the stiffness of the base sheet before firing, etc., thermofusible synthetic fibers may be used alone or other fibers (pulp may be used). (including) 3% by weight
It is preferable to use the above in combination. The roll press used in the present invention may be a calendar used for paper manufacturing, or any similar device such as a roll for kneading rubber and plastics or a roll for embossing, and the material of the rolls may be metal rolls or similar equipment. or a combination of metal rolls and elastic rolls such as rubber rolls, asbestos rolls, or cotton rolls, or combinations of elastic rolls, and if necessary, the rolls can be embossed with patterns, etc. Even with a combination of engraved rolls and rolls that can be heated to improve the crimping properties, if a chest plate sheet and a citrus sheet are passed between the two rolls, the linear pressure at the roll nip will decrease. (Linear pressure means the pressure between two cylinders that are in contact and overlap.

It is 10 [indicated by 9] per length of the cylinder.
It is sufficient if it is formed so that the weight is 0 kg/skin or more. If the linear pressure of the roll press is less than 100 k9', the sheets will not adhere well to each other, and the sheets may peel off during the firing process, making it impossible to obtain a satisfactory pongee ceramic plate. By passing between two rolls with a linear pressure of 100k9/g or more, the chest plate sheet and pongee medicine sheet are
This becomes the integrated pongee ceramic board base, and if necessary, this base is cut with a cutter to the desired size of the pongee china board. For continuous production, a cutter with a rotary blade may be used.

In the present invention, the firing temperature and time for firing the base ceramic board in a kiln are the same as the temperature and time for firing when obtaining the base pongee porcelain board of the subordinate pottery. Varies depending on the type.

One example of a specific implementation method of the present invention described above will be explained with reference to the drawings. FIG. 2 shows an apparatus for implementing the present invention, in which a pongee medicine sheet 9 with a moisture content of 50% or less and a pongee medicine sheet 9 with a moisture content of 50% or less are shown.
The following Cheshijisaka sheets 10 are overlapped and crimped together with a linear pressure of 100 k9/press or more using a pair of crimping rolls 11 and 11' to form a pressed ceramic plate base 12, and the base 12 is used as required. After cutting to the desired size, it is fired. In this case, it is also possible to overlay and press a plurality of yuzu medicine sheets 9 and one sheet for the chest magnetic plate, and also to overflow the pair of crimping rolls 11, 11' to press the yuzu medicine sheet 9 and the ceramic plate sheets. There is no problem in crimping the plate sheet 10. In particular, when containing synthetic fiber materials such as synthetic pulp, thermal welding between fibers occurs due to heating.
It is possible to improve the adhesion of the yuzu medicine sheet and the sheet for ceramic plates. In addition, in order to form a pongee pongee chest plate base by pressing together a citron sheet with a moisture content of more than 50% and a pectoral plate sheet, the citron sheet is prepared using the dewatering device shown in Figure 1. Then, the chest magnetic plate sheet may be dehydrated to reduce the moisture content to 50% or less, and then crimped using the apparatus shown in FIG. 2. The advantages of the manufacturing method of the present invention will be described below in comparison with conventional manufacturing methods.

○'Improvement of production speed While the conventional compression process for manufacturing chest magnetic plates is a batch production method using a compression molding machine (flat plate press machine), the present invention uses a continuous production method using a roll press machine. Therefore, the production speed can be increased several times to more than ten times that of the conventional method.

{2) It is possible to manufacture large-sized pongee pottery plates with high production and high speed.It is possible to continuously produce pongee pottery plates of any desired size, from small to large, and especially in the production of sub-chambers. This method has made it possible to manufacture large pongee ceramic plates of 20 square meters or more with high production and high yield, whereas the productivity was poor with this method.

'31 Solving the Pollution Problem In the conventional method of manufacturing pongee chest plates, dust is generated because the powder of the sage and the powder are used as they are. However, in the manufacturing method of the present invention, since sheets are used, no pollution problem occurs.

'4' Partially applied pongee Ceramic plates can be manufactured in a continuous manner.It was difficult to apply various patterns etc. on the surface of a ceramic plate in a continuous manner in parts using the conventional batch production method. In the method of the present invention, a sheet for a ceramic board is laid, a sheet for a ceramic board is re-placed on a portion, the sheet is re-formed in a roll press, the sheet is cut as necessary, and then fired. Magnetic plates can be produced continuously.

In addition, since various designs can be printed on the citron sheet and sewn over the entire surface of the chest magnet plate, chest magnet plates with various designs can be continuously manufactured. {51 Improving product progress Because a flat plate press is used for compression molding in the production of the following breast plate, it is difficult to degas the plate during pressing, and the residual air may cause the scales of the plate to form. However, in the present invention, there is no need to worry about degassing as the product is pressed with rolls, and the occurrence of defective firing spots due to insufficient deaeration is completely eliminated, and the product yield is dramatically improved.

'6' It is possible to continuously manufacture pongee chest porcelain plates with three-dimensional irregularities on the surface. Conventional pongee ceramic plates require manual labor to create three-dimensional irregularities on the pongee surface. Therefore, it had to be expensive.

However, in the method of the present invention, by using an emboss roll as the pressure roll, it is extremely easy to give three-dimensional unevenness to the surface of the citrus ceramic plate, and it is also possible to continuously produce this, so it is an art. A highly durable porcelain plate can be manufactured at low cost. '7 - It is possible to manufacture large and thin woven ceramic plates Since the present invention uses a roll-type press machine, it is possible to manufacture woven ceramic plates that are large in both width and length, and it is also possible to manufacture woven ceramic plates that are large in width and length. Due to the intertwining effect of the fibers, the strength of the pongee ceramic plate is stronger than that of the conventional one, and it is possible to deform large pieces even with a thickness of 5 sides or less. It can be manufactured without any

', 81 It is possible to manufacture pongee chest magnetic plates without misalignment of the pongee. In the conventional manufacturing method, if a pongee sheet is also used for manufacturing, the pongee sheet cannot be precisely repositioned on the chest magnetic plate base material. Misalignment occurs because the edges of the pongee ceramic plate and the edges of the pongee sheet do not match.

However, in the method of the present invention, the problem of misalignment does not occur at all because the ceramic plate sheet and the pongee sheet are continuously rolled up and wrapped. Furthermore, after crimping, the entire piece is cut with a cutter if necessary, so there is no problem of misalignment of the pongee. Examples are described below.

Example 1 Parts by weight of synthetic pulp 1 were mixed with parts by weight of Citrus 9, followed by resinous resin (polyamide polyamine mepichlorohydrin type), sulfuric acid band, and coagulant (polyacrylamide type). 3 with a moisture content of 10% by wet papermaking.
00 Yu/I got that pongee medicine sheet.

On the other hand, 1 part of synthetic pulp is added to 9 parts by weight of powder.
A moisture-resistant resin (polyamide polyamine epichlorohydrin type), sulfuric acid band, and a flocculant (polyacrylamide type) were added in this order to the mixture, and wet papermaking was carried out to make 800 sheets of paper with different moisture contents. A magnetic plate ordered sheet was obtained. The citron sheet obtained as described above and the sheet for ceramic plate were laminated and pressed and molded using a roll press machine, and the molded base was heated in a scaling furnace at an overflowing rate of 3 to 4°C/min and a maximum temperature of 12°C.
The scales were formed under conditions of holding for 5 minutes and 1 minute, and the results were shown in Table 1.

Table 1 From the results in Table 1, it can be seen that there is no problem even if the pure drug sheet and the chest magnetic plate sheet are crimped at room temperature, or even if the pressure is overflowing. If the moisture content exceeds 50%, the adhesion between the ceramic plate sheet and the cuff sheet will be poor, making it impossible to obtain a good pongee ceramic plate.

Further, even if the pressing pressure is less than 100 k9/min, a good pongee breast plate cannot be obtained. From this, it is clear that both the moisture content in the chest magnetic plate sheet and the pressure when the cuff medicine sheet and the chest magnetic plate sheet are attached must be specified. In this example, the moisture content of the pongee medicine sheet was set to 10%, and the moisture content of the chest magnetic plate sheet was varied.
Although the results are shown in this example, results similar to those of this example were also obtained when the moisture content of the chest magnet plate sheet was set to 10% and the moisture content of the pongee medicine sheet was varied.

Example 2 85 parts by weight of pongee medicine was mixed with 15 parts by weight of fiber materials (9 parts by weight of synthetic pulp, 6 parts by weight of wood pulp), and to this was added a temperature-resistant resin (bolyamide polyamine mepichlorohydrin) sulfate band. and a flocculant (polyacrylamide type) were added in this order, and wet papermaking was performed to obtain a pongee sheet with a moisture content of 10% and a paper weight of 300 sheets per day.

On the other hand, 1 part of fibrous material (6 parts by weight of synthetic pulp, 4 parts by weight of wood pulp) is mixed with 9 parts by weight of /.
A moisture-resistant resin (polyamide polyamine epichlorohydrin type) sulfuric acid band and a flocculant (polyacrylamide type) were added to this in this order, and wet papermaking was carried out to form a paper with a moisture content of 10%.
00 evening/I got that chest plate sheet. The six sheets for ceramic plates obtained as described above were stacked one after another, and one of the above-mentioned citron sheets was superimposed on the top surface of the stack, and the sheets were crimped with a linear pressure of 150 k9' in a calender consisting of two metal rolls. A pongee chest magnetic plate base material and a pongee chest magnetic plate base material crimped with a linear pressure of 300 k9' were obtained. Next, this chest plate material was cut into a size of 20 x 30 using a guillotine cutter.
Temperature increase rate 3-4℃/Branch high temperature 1230℃, 1
When fired under the conditions of maintaining the temperature, the linear pressure was 150k9'.
Therefore, we were able to make a strong, thin, pressed chest porcelain board from both the crimped and pressed ceramic board bases and the pressed ceramic board bases, which were bonded at a linear pressure of 300k9'.

Example 3 Both sides of the ceramic plate sheet obtained in Example 1 with a moisture content of 60% and a thickness of 10 W' were sandwiched between the dehydration rhombuses shown in Figure 1 and passed through at a circumferential speed of 50/min. I did dehydration.

At this time, the dehydration using the second and third rolls is performed by sandwiching the chest plate sheet between two sides of felt with a thickness of low/thick to the extent that the chest plate sheet and the felt are slightly in contact with each other. At a pressure of , the 40th roll has a linear pressure of 25k9/k, and the 5th roll has a linear pressure of 50k9/k.
Dehydration was carried out at a linear pressure of 70k9/cm on the sixth roll, and at a linear pressure of 90k9'/cm on the seventh roll. As a result, when the moisture content of the obtained chest magnetic plate sheet was adjusted to 25%, it was crimped with a linear pressure of 100k9/cm. Next, this ceramic plate sheet and the citron sheet obtained in Example 1 were superimposed, and a pongee ceramic plate base was formed in the same manner as in Example 1, and then heated in a firing furnace at a heating rate of 3~ 4℃, maximum temperature 1
When fired under the conditions of 25 mm and held for 10 minutes, a strong and thin ceramic plate could be obtained.

[Brief explanation of the drawing]

An example of an apparatus for dehydrating the water content of ceramic plate sheets and apricot sheets that are larger than 50% to below 50%. Figure 2 shows an example of an apparatus for crimping the chest magnetic plate sheets and apricot sheets. It is. 1... Chest plate sheet or citron sheet, 2,2'
, 3, 3', 4, 4', 6, 5', 6, 6', 7, 7'
...Pressure roll, 8...Base, 9...
Pongee medicine sheet, 10...Sheet for ceramic plate, 11,
11'...Crimping roll, 12...Sesode porcelain board base. Ta 1 1 Tsuka no Gan

Claims (1)

[Claims] 1 One or more sheets for ceramic plates with a moisture content of 50% or less, consisting of 70 to 95 parts by weight of high soil and 30 to 5 parts by weight of fiber material, 70 to 95 parts by weight of glaze, and 30 parts by weight of fiber material - 5 parts by weight of glaze sheet with a water content of 50% or less, and heat as necessary using a roll-type press crosspiece to apply a linear pressure of 100 kg at the roll nip.
A method for manufacturing a glazed ceramic plate, which comprises: integrally and continuously molding a glazed ceramic plate base under a pressure of /cm or more, cutting the base to a desired size as necessary, and then firing the base.