JPS63149143A - Tile for lining and manufacture thereof - 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 (Field of Industrial Application) The present invention relates to a lining tile that is attached to the surface of a base material with a bonding agent in order to improve the heat resistance, corrosion resistance, abrasion resistance, etc. of the base material. The present invention relates to a manufacturing method thereof.

(Prior Art) For example, the metal impeller of a pump that conveys slurry liquid or the like is exposed to severe wear and corrosion depending on usage conditions. For this reason, the life of the base material is increased by lining the surface of the base material with alumina-based or zirconia-based ceramic tiles that have excellent heat resistance, corrosion resistance, and abrasion resistance. Various bonding agents such as cement, mortar, organic adhesives, and metal bonding agents are used to fix these ceramic tiles to the base material surface, but conventional ceramic tiles have flat bonding surfaces. Therefore, the bonding force to the base material cannot be said to be sufficient, and attempts have been made to improve the anchoring effect of the bonding agent by mechanically roughening the joint surface, but it easily peels off when the base material is deformed due to thermal expansion etc. There was a drawback to it.

(Problems to be Solved by the Invention) The present invention has been completed with the aim of solving these conventional problems and providing a lining tile and a method for manufacturing the same that can significantly increase bonding strength to base materials such as metals. It is what was done.

(Means for Solving the Problems) The present invention is a first invention relating to a lining tile characterized by having a large number of independent recessed holes having an inner diameter larger than an opening diameter on a joint surface with a base material. Then, on the surface of the lower mold, a number of spherical bodies made of a material that melts, burns out, or sublimates at a temperature below the firing temperature of the ceramic are arranged at appropriate intervals, and the ceramic raw material is filled from the upper surface to form the tile body, A second invention relating to a method for manufacturing a lining tile, characterized in that the molded product is calcined or left in the atmosphere to remove spherical bodies and then fired; The present invention also relates to a method for producing a lining tile, which comprises forming a preform, pressing the unfired preform in a mold to plastically deform the peripheral edge of the recess inward, and then taking it out of the mold and firing it. This invention consists of a third invention.

(Example) Next, the present invention will be explained in detail with reference to the illustrated example.
Figure 1 shows the first embodiment, in which (1) is a tile body made of a ceramic material with excellent heat resistance, corrosion resistance, and wear resistance, such as partially stabilized zirconia or alumina, and (2) is its matrix. The joint surface (3) with the material is a large number of independent recesses formed in the joint surface (2). The recessed hole (3) is formed so that its inner diameter is larger than its opening diameter, and its inner peripheral surface is spherical.To manufacture a lining tile as shown in Figure 1, first polystyrene is A spherical body (4) is formed from a material that melts or burns out at a temperature below the firing temperature of ceramics, such as resin, or a material that sublimates at room temperature, such as naphthalene, and is then molded into a sheet such as adhesive tape as shown in Figure 2. (5) at appropriate intervals, and then placed on the surface of the lower mold (6) as shown in FIG. Also, without using the sheet (5), the spherical body (4) is directly placed in the lower mold (
6) may be adhered to the surface. Spheroid (4) and sheet (
5) and the adhesive force between the spherical body (4) and the lower mold (6) allow the spherical body (4) to be easily peeled off from the lower mold (6) when releasing the molded body. Keep it as much as possible. Next, the top surface of the spherical body (4) is filled with ceramic powder (7) and compression molded using an upper mold (8), or the tile body is formed by casting ceramic powder.

The molded body thus obtained was taken out from the mold, and
If the spherical body (4) is calcined at a temperature of around 0°C or is made of a sublimable material, the spherical body (4) will disappear if it is left in the atmosphere. A lining tile having a large number of independent recessed holes (3) on the joint surface (2) as shown in the figure is obtained. As can be seen from the above-mentioned process, the spherical body (4) needs to be fixed to the surface of the lower mold (6) when it is filled with the ceramic raw material, so in order to increase stability, it is necessary to Hole (
In order to make the opening diameter of 3) an appropriate size, it is preferable to have a flat part at the bottom rather than a completely spherical body. Further, a recess corresponding to the spherical body (4) may be provided on the surface of the lower mold to prevent movement of the spherical body (4). However, in the case of compression molding, it is possible to use a completely spherical body since it will be crushed by the compression force.

Next, in the second embodiment shown in FIG. 4, a large number of independent recessed holes (3) formed in the joint surface (2) of the tile body (1) have narrow openings and are crushed. It has an approximately cylindrical shape. In order to manufacture a lining tile having such a shape, first, a preform 00 having a large number of independent cylindrical recesses (9) as shown in FIG.
) is molded by compression molding method or slip gearst method. At this time, water, an organic binder, etc. are added to the ceramic raw material. Such a preform 00) is
As shown in the figure, the lower mold (6) is placed with the fourth part (9) facing upward.
), interpose a sheet (11) if necessary, and compress it strongly with the mold (8) to form the recess (9).
The peripheral edge (12) of the opening part is plastically deformed inward by pressure. Preform α0) plastically deformed in this way
If it is removed from the mold and fired, a lining tile as shown in FIG. 4 will be obtained.

Next, in order to evaluate the adhesive strength of the lining tiles of the present invention, the following experiment was conducted.

First, a lining tile as shown in FIG. 1 was manufactured by compression molding using the method of the second invention shown in FIGS. 2 and 3. The spherical body (4) was made of polystyrene and had a diameter of 3.5 mm, the tile body (1) had dimensions of 30 Tn x 40 m x 3 tm thickness, and partially stabilized zirconia was used as the ceramic raw material. 30 of this
Calcined at 0°C for 2 hours to remove the spherical bodies (4), and further heated to 150°C.
The first test piece was baked at 0°C for 4 hours.

Next, a lining tile as shown in FIG. 4 was manufactured by the method of the third invention of the present application shown in FIGS. 5 and 6. The ceramic raw material was partially stabilized zirconia, and an organic binder was mixed therein as a binder. The dimensions of the preform are 30 fl x 4 Q11 x 5 R thickness, and the six recesses (9) have an inner diameter of 5 m and a depth of 3.5 m.
It is m. This was pressed in a mold with a load of 80 kg to plastically deform the opening diameter of the recess (9) to 3.8 mm. Thereafter, the sample was fired at 1500° C. for 4 hours and used as a second test piece. Furthermore, a conventional ceramic tile with the same dimensions (30 inches x 40 meters x 61 meters thick) and a flat joint surface (2) was manufactured from the same material, and this was used as a third test piece.

These first to third test pieces were coated with an organic adhesive (21) commercially available from Sumitomo 3M under the product number SW2214-HT on the surface of a bonding member (20) made of 5S41 material whose surface had been sandblasted. Each was pasted by

There are two types of adhesive thickness: 0.5 fin and 1 fl, and the adhesive area is 25nx28n in both cases, and the six openings described above are within this adhesive area. As shown in Figure 7, the ceramic tile is placed on a U-shaped pedestal (22), and an inverted U-shaped pressing tool (23) is used to press only the ceramic tile downward (based on ASTM-0321). ) Therefore, the peel strength was evaluated. The results are shown in the table below.

As is clear from the above data, the lining tiles of the present invention have a large bonding force with the base material, so as shown in FIG. When bonded, a lining layer with excellent heat resistance, corrosion resistance, and abrasion resistance can be formed.

(Effects of the Invention) As is clear from the above description, the lining tiles of the first invention of the present application can significantly increase the bonding force to the base material, and are suitable for lining various mechanical parts such as impellers. It is suitable for Moreover, according to the second and third inventions of the present application, the above-mentioned lining tiles can be easily manufactured. Therefore, the present invention can greatly contribute to the development of industry as a lining tile and its manufacturing method that solves the conventional problems.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of the present invention;
Figure 2 is a perspective view showing the manufacturing process, Figure 3 is a sectional view also showing the manufacturing process, Figure 4 is a partially cutaway perspective view showing the second embodiment, and Figure 5 is the manufacturing process. Perspective view, No. 6
7 is a perspective view showing a peel strength testing device, and FIG. 8 is a partially cutaway perspective view showing an example of the state of use. (1): Tile body, (2): Joint surface, (3): Recessed hole,
(4) Bispheroid, (9): recess. Figure 1 q; Concave cloud γ Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A lining tile characterized by having a large number of independent recessed holes with an inner diameter larger than the opening diameter on the joint surface with the base material. 2. On the surface of the lower mold, a large number of spherical bodies made of a material that melts, burns out, or sublimates at a temperature below the firing temperature of ceramics is arranged at appropriate intervals, and the ceramic raw material is filled from the top surface to form the tile body, A method for manufacturing a lining tile, which comprises calcining or leaving a molded product to remove spherical bodies and then firing. 3. Form a ceramic preform with a large number of independent recesses on its surface, press it in an unfired mold to plastically deform the periphery of the recesses inward, and then remove it from the mold. A method for manufacturing lining tiles, which comprises firing.