JP2927666B2 - Powder press molding machine for brick molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder supply charger table which is one of components of a powder press molding machine such as a brick molding machine. The present invention relates to a charger table that slides with a powder and a charger when a body is transported to a press mold portion.

[0002]

2. Description of the Related Art In general, brick production involves powder (mixed raw material).
The process of (1) kneading (2) molding (3) firing is followed. Of these, the molding process is briefly described as shown in FIG. That is, the blended raw material 1 is put into the charger 3 from the hopper 2, and the blended raw material is transferred by the charger to the punch die 4, and the steel charger table 5
It is conveyed above and thrown. Next, after being pressed by a punch die, it is taken out.

[0003] The steel charger table used in the above-described press forming machine for bricks has a very low frictional wear, especially with respect to sliding abrasion, because the raw material mixes into the gap between the charger and the gap when the raw material is conveyed by the charger. Used under severe conditions.

[0004]

Conventionally, the upper surface of the table is worn during use of the molding machine, and the compounding raw material is spilled from the gap between the charger and the table, and dust is generated. Therefore, the table must be replaced frequently. There was a problem.

[0005]

Means for Solving the Problems The present inventors have developed a powder press molding machine for brick molding according to the present invention as a result of various studies and experiments in order to solve various defects of the conventional method. The technical configuration of a powder press molding machine used for brick molding and the like is that alumina, zirconia, silicon nitride, and carbonized A material composed of one of silicon and sialon or a composite composition of these ceramics is provided, and the composition such as the sintered ceramic is formed of a tile-shaped divided segment or an integral shape, and the composition such as the sintered ceramic is distributed. Installation, fixation is in the powder press molding machine for brick molding, characterized in that it is either bonding by adhesive or mounting by mechanical means, It is an object of the present invention to provide a powder press molding machine for brick molding that can be used continuously for a long period of time, and furthermore, the ceramic material to be joined can be selected appropriately in consideration of wear resistance. It is assumed that.

In the present invention, as the material of the sintered ceramic, alumina, zirconia, silicon nitride, silicon carbide, sialon, porcelain and the like can be used. A particularly preferred material is alumina (purity: 90%
), Zirconia, silicon nitride (Si ₃ N ₄ ), silicon carbide (SiC), and sialon.
Shown in Table 1 also shows the characteristics of the steel material (SS400) for comparison.

[0007]

[Table 1]

In order to investigate and measure the wear characteristics of a part generally used as a sliding wear part, the result of an erosion test agrees relatively well with actual use conditions. The results of the erosion test are also described in Japanese Patent Application No. 5-100292, but in order to examine the sliding wear resistance, a sand blast wear test was performed in the same manner as in the above-mentioned Japanese Patent Application. In this test, silicon carbide powder having a particle size of 50 μm is sprayed at 90 ° to the test piece at a distance of 50 mm from the test piece, for a time of 2 minutes, and at a pressure of 0.49 MPa. In order to approach the use condition of the charger table, a method of spraying the test piece at a collision angle of 45 ° was also performed. As a method of evaluating the test results, the wear amount (wear volume) of the test pieces was measured and compared.
The ceramic test piece used here was alumina (purity: 90%, 94%, 99%, 99.8%, 99.95).
%, A total of 5 types), zirconia, silicon nitride, silicon carbide,
The test piece made of sialon and used for comparison was SS400. FIG. 2 shows the test results of the sandblast abrasion test on these test pieces. FIG.
From the viewpoint of comparison with a steel test piece (SS400) used for a normal charger table, even when sprayed at 90 ° or 45 °, the ceramic material used in the test is several times as large in terms of wear resistance. It turns out that it is several times better. Among ceramic materials, it was recognized that the higher the purity of alumina, the smaller the amount of wear as the purity was higher. In particular, high-purity alumina (99.8% or more) showed almost no difference from zirconia, silicon nitride, silicon carbide, and sialon. The order of wear amount is as follows: sialon ≦ silicon carbide ≦ silicon nitride <zirconia ≦ 99.95% alumina <9
9.8% alumina <99% alumina <94% alumina <
It was confirmed that it was 90% alumina.

[0009] The charger table of the present invention is characterized in that the ceramic tile is disposed on a steel base table. The method for joining the ceramic tiles is not particularly limited, but includes epoxy,
Alternatively, it is preferable to use a urethane-based adhesive or the like.

Further, in the ceramic charger table of the present invention, a high-purity product of alumina having more excellent wear resistance, zirconia, silicon nitride, silicon carbide, It is also possible to perform selective laminating work according to the purpose (so-called zone arrangement work), for example, using sialon or the like and making other parts with low abrasion resistance but inexpensive low-purity alumina.

[0011]

The charger table according to the present invention has abrasion resistance by bonding and bonding a sintered ceramic plate tile such as alumina, zirconia, silicon nitride, silicon carbide, and sialon to a sliding surface with the charger. And an effect that the life is ten times or more as compared with the conventional steel sheet is produced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Four embodiments of the present invention will be described below.

The ceramic charger table is made of a table steel plate and a ceramic tile. When the steel plate and the tile are joined, they are manufactured using an epoxy-based adhesive. The charger is made of a steel charger main body, ceramic tile or urethane rubber, and when the main body and the tile or rubber are bonded, they are bonded using an epoxy adhesive.

Example 1 A ceramic table was used for a charger table for a brick forming pressure of 500 tons. The material is made of alumina (purity 90 to 99.95%), zirconia, silicon nitride, and silicon sialon, and a tile of 40 mm square × 3 mm thick is manufactured, and 1100 mm × 800
900 mm x 600 mm on a steel plate with a thickness of 16 mm x 16 mm
An epoxy-based adhesive was applied over the area of the punch-type portion (including a punched portion of 600 mm × 310 mm) to bond the tiles. Using this table, alumina particles and carbon powder were used as compounding materials for brick production, and the results (life due to table wear) of the actual machine were evaluated. The result is shown in FIG. For comparison, iron-based materials (SS400)
FIG. 3 also shows the result of using the same actual machine as above using a conventional table consisting of

The compounding raw materials in this example are: alumina particles: particle size 0.1 to 0.2 mm carbon powder: particle size 50 to 60 μm, and the weight ratio is 1: 1.

Regarding the life of the table, the thickness of the tile at the thinnest point is 0.3 mm (the wear amount is 2.7 m).
m). As shown in FIG. 3, the ceramic-attached charger table has a service life that is at least five times longer than that of a conventional steel table with respect to sliding abrasion. Particularly, alumina (purity: 99.95%) and silicon nitride ,
Silicon carbide and Sialon exhibited a service life 10 times or more that of conventional materials. In addition, the period up to the life in actual use is in the order of sialon> silicon carbide> silicon nitride>zirconia> alumina (from high purity to low purity)> SS400, which is almost the same as the sandblast test result described above. It was a trend.

Example 2 A ceramic tile was used for a charger table for a brick forming pressure of 500 tons. As the material, a tile of 40 mm square × 3 mm thick was manufactured from alumina (purity 99.8%), and 1100 mm × 800
900 mm x 600 mm on a steel plate with a thickness of 16 mm x 16 mm
An epoxy-based adhesive was applied over the area of the punch-type portion (including a punched portion of 600 mm × 310 mm) to bond the tiles. The material of the charger that slides on the table is urethane rubber having a hardness of 70, alumina (purity of 90 to 99.95%), zirconia, silicon nitride,
A tile having a size of 40 mm square and a thickness of 3 mm was manufactured using silicon carbide and Sialon, and joined to the charger body using an epoxy adhesive. Using this table and charger, alumina particles and carbon powder were used as compounding raw materials for brick production, and the results of using the actual machine (life due to wear of the charger) were evaluated. FIG. 4 shows the results.

The compounding raw materials of this example are: alumina particles: particle size 0.1 to 0.2 mm carbon powder: particle size 50 to 60 μm, and the weight ratio is 1: 1.

Regarding the life of the charger, the thickness of the thinnest tile is 0.3 mm (wear amount 2.
7 mm). As shown in FIG. 4, the ceramic-attached charger has five times or more the life of sliding wear as compared to the rubber-attached charger. In particular, silicon nitride, silicon carbide, and sialon use the conventional material rubber. The service life was 10 times or more as compared with that of the prior art. In addition, the period up to the life in actual use is in the order of sialon> silicon carbide> silicon nitride>zirconia> alumina (from high purity to low purity)> rubber, which is almost the same as the above sandblast test result. It was a trend.

Example 3 A ceramic table was used for a charger table for 800 tons of brick forming pressure. The material is alumina (purity 90 to 99.95%), zirconia, silicon nitride, silicon carbide, sialon, 40 mm
Square tile x 3mm thick tile is manufactured, 850mm x 820
800mm × 720mm on a steel plate of mm × 15mm thickness
An epoxy-based adhesive was applied over the area of the punch (including the punch-shaped portion 640 mm × 330 mm) to bond the tiles. Using this table, alumina particles and carbon powder were used as compounding materials for brick production, and the results (life due to table wear) of the actual machine were evaluated. The result is shown in FIG. For comparison, iron-based materials (SS400)
FIG. 5 also shows the results of using the same actual machine as above using a conventional table consisting of

The raw materials used in this example are: alumina particles: particle size 0.1 to 0.2 mm carbon powder: particle size 50 to 60 μm magnesia particles: particle size 1.0 to 1.5 mm, and the weight ratio is 1 1: 2.

Regarding the life of the table, the thickness of the tile at the thinnest point is 0.3 mm (wear amount 2.7 m).
m). As shown in FIG. 5, the ceramic-attached charger table has five times or more the life of sliding wear as compared with the conventional steel table. In particular, alumina (purity 99.95%), silicon nitride ,
Silicon carbide and Sialon exhibited a service life 10 times or more that of conventional materials. In addition, the period up to the life in actual use is in the order of sialon> silicon carbide> silicon nitride>zirconia> alumina (from high purity to low purity)> SS400, which is almost the same as the sandblast test result described above. It was a trend.

Example 4 A ceramic table was used for a charger table for a brick forming pressure of 800 tons using a ceramic tile. The material was alumina (purity 99.8%), 40 mm square.
Produce a 3mm thick tile, 850mm x 820mm
An epoxy-based adhesive was applied to a steel plate having a thickness of 15 mm over a width of 800 mm x 720 mm (including a punched portion of 640 mm x 330 mm), and the tiles were bonded. The material of the charger that slides on the table is a urethane rubber having a hardness of 70, alumina (purity 90 to 99.95%), zirconia, silicon nitride, silicon carbide, and sialon, 40 mm square × 3 mm thick. Was manufactured and joined to the charger body using an epoxy adhesive. Using this table and charger with alumina and carbon powder as blending raw materials for brick production, results of actual use (life due to charger wear)
Was evaluated. FIG. 6 shows the result.

The blending raw materials in this example are: alumina particles: particle size 0.1 to 0.2 mm carbon powder: particle size 50 to 60 μm magnesia particles: particle size 0.1 to 1.5 mm, and the weight ratio is 1 1: 2.

Regarding the life of the charger, the thickness of the tile at the thinnest point is 0.3 mm (wear amount 2.
7 mm). From FIG. 6, the ceramic-attached charger has five or more times the life of sliding wear as compared with the rubber-attached charger. In particular, alumina (purity: 99.95%), silicon nitride, silicon carbide Sialon showed a service life 10 times or more longer than that of the conventional material. Also, the period up to the life in actual use is sialon> silicon carbide> silicon nitride> zirconia ≧
The order of alumina (from high purity to low purity)> rubber was almost the same as the sandblast test result described above.

FIG. 7 is a side view of a main part showing another example of the present invention. In this example, not only is a sintered ceramics layer provided on the upper surface of the charger table 5, but also a lower edge portion of the charger 3 (FIG. The sintered ceramic layer is also provided on the lower part sliding on the surface of the charger table), and the wear resistance is greatly improved as compared with the case where the sintered ceramic layer is provided only on the upper surface of the charger table. Is allowed.

In the above-described embodiment, the example of bonding the sintered ceramics to the table base by using an adhesive has been described. However, it is needless to say that mechanical fixing means such as screwing can be used without using an adhesive. is there.

[0028]

As described in detail above, the present invention is characterized in that a ceramic tile excellent in wear resistance is bonded to a sliding surface of a charger table steel sheet with a charger. As compared with the conventional steel charger table, the life due to sliding wear is about 10%.
It was confirmed that a remarkable practical effect was obtained in that the improvement was more than doubled.

[Brief description of the drawings]

FIG. 1 is a schematic view of the flow of compounding raw materials in brick molding.

FIG. 2 is a diagram showing the results of a sandblast wear test on various ceramic test pieces and steel test pieces.

FIG. 3 is a graph showing the number of bricks manufactured up to the table life in Example 1.

FIG. 4 is a graph showing the number of bricks manufactured up to the table life in Example 2.

FIG. 5 is a graph showing the number of bricks manufactured up to the table life in Example 3.

FIG. 6 is a graph showing the number of bricks manufactured up to the table life in Example 4.

FIG. 7 is a side view showing another example to which the sintered ceramics according to the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Raw material 2 Hopper 3 Charger 4 Punch type part 5 Charger table 6 Upper punch 7 Lower punch 8 Transfer robot 9 Ceramics layer 10 Press molded article 11 Steel table stand

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-56680 (JP, A) JP-A-58-151240 (JP, A) JP-A-7-80821 (JP, A) JP-A-3-80 69311 (JP, A) Japanese Utility Model 60-34408 (JP, U) Japanese Utility Model 58-194006 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B28B 3/02

Claims (1)

(57) [Claims] In a powder press molding machine used for brick molding or the like, alumina, zirconia, silicon nitride, silicon carbide, or the like is used as a sintered ceramic in a sliding portion with a charger table and / or a movable charger for supplying powder. ,
A type of sialon or a composite composition of these ceramics
A material made of a material
If the product is a tiled segment or an integral
The arrangement and fixation of the composition such as the sintered ceramic,
Either adhesive bonding or mounting by mechanical means
A powder press molding machine for brick molding, characterized in that: