JPH0442073B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an apparatus for manufacturing a perforated screening plate for a vibrating screening machine used to screen iron ore, coke, and the like.

BACKGROUND TECHNOLOGY A perforated plate used for the above purpose includes, for example, a ceramic layer having sieve holes and a ceramic layer having sieve holes formed on the lower surface of the ceramic layer, as disclosed in JP-A-60-122082. A rubber layer having sieve holes communicating with the ceramic layer is known, and the ceramic layer is made of a plurality of ceramic tiles that are bonded to the rubber layer but not adjacent to each other.

In the above-mentioned perforated plate, the ceramic layer and the rubber layer are separately molded into predetermined shapes in advance, and then,
A perforated plate was manufactured by manually joining the two.

Problems to be Solved by the Invention As mentioned above, manually manufacturing a perforated plate is inefficient and unsuitable for mass production, and there are problems in that the manufacturing cost is high.

An object of the present invention is to provide a manufacturing apparatus that can manufacture the above-mentioned perforated plate at low cost.

Means for Solving the Problems A manufacturing apparatus according to the present invention includes a ceramic layer having a sieve hole and a rubber layer having a sieve hole formed on the lower surface of the ceramic layer and communicating with the sieve hole. , a device for manufacturing a perforated plate consisting of a plurality of ceramic tiles that are bonded to a rubber layer but not adjacent to each other, the perforated plate is placed on the bottom surface of an upwardly facing cavity of a rubber vulcanization mold. Ceramic tile positioning protrusions are provided that fit into the portions that should become sieve holes.

Embodiments Embodiments of the present invention will now be described with reference to the drawings.

In the following explanation, vertical and horizontal refers to the vertical direction of Fig. 1, with Fig. 1 as a reference, and horizontal direction is horizontal. It is defined as

The perforated plate is formed of a ceramic layer 11, a rubber layer 12, and an iron plate layer 13 in this order from the top.

The ceramic layer 11 has a large number of sieve holes 21 and consists of a large number of ceramic tiles 22. The sieve holes 21 are all horizontally elongated rectangles of the same shape, specifically rectangles of 4 x 40 mm, and are arranged in rows vertically and horizontally. The ceramic tile 22 has a rectangular shape, specifically a square of 10×20 mm, and a thickness of 4 mm. The ceramic tiles 22 are arranged in a pattern described below. First, although not shown in their entirety in FIG. 1, ceramic tiles 22 are arranged along the outer peripheral edge of the perforated plate so as to be continuous in the length direction thereof to form one frame. Inside the ceramic tiles 22 forming the frame in this way, the ceramic tiles 22 are arranged so as to extend vertically in a row in the lengthwise direction between the vertical rows formed by the sieve holes 21. There is. In this way, between adjacent ceramic tiles 22 extending in the vertical direction, two ceramic tiles 22 are arranged horizontally in a row in the length direction, located between the adjacent sieve holes 21. has been done. As a result of the ceramic tiles 22 being arranged as described above, one sieve hole 21 is surrounded by a total of six ceramic tiles 22, two from each side and one from each end. Another one
two sieve holes 21 from each side,
It is surrounded by a total of eight ceramic tiles 22, two from each end.

The rubber layer 12 has a thickness of 3 mm and has a sieve hole 23 communicating with the sieve hole 21 . The sieve holes 23 in the rubber layer 12 are rectangular, one size larger than the sieve holes 21 in the ceramic layer 11, and have rounded ends, with a length of 42 mm and a width of 6 mm.

The iron plate layer 13 has a thickness of 3.2 mm and has sieve holes 24 that match the sieve holes 23 of the rubber layer 12.

FIG. 3 shows a rubber vulcanization mold 31 for manufacturing the above-mentioned perforated plate. The bottom surface of the upward cavity 32 of the mold 31 is formed flat, and there are ceramic tile positioning protrusions 33 on the bottom surface.
are integrally provided. The protrusion 33 has an outer circumferential surface that matches the inner circumferential surface of the sieve hole 21 and has a thickness greater than or equal to the combined thickness of the ceramic layer 11 and rubber layer 12 of the perforated plate. The height is less than the combined thickness.

When forming a perforated plate, first, cavity 3
Ceramic tiles 22 are arranged in the above-described pattern on the bottom surface of 3 where there is no protrusion 33. Next, a thermosetting adhesive is coated on the ceramic tile 22, and a rubber plate 34 before vulcanization is placed thereon. In this case, the lower surface of the rubber plate 34 may also be coated with a thermosetting adhesive. A hole 35 that will become the sieve hole 23 is pre-drilled in the rubber plate 34, and the projection 33 is fitted into the hole 35. Next, an iron plate 36 with holes 37 pre-drilled in the same manner is placed on top of the rubber plate 34. Then, pressure is applied from above the iron plate 36 using a hot platen (not shown).
Heat. Then, when the rubber is vulcanized after a predetermined period of time has elapsed, a perforated plate is obtained, which can be taken out from the mold 31.

In the above embodiment, the ceramic tiles are rectangular, but instead of this, the following ceramic tiles may be used. That is, FIG. 4 shows a ceramic tile 41 having a notch 42 formed in one edge. Then, two ceramic tiles 41 are arranged so that their respective notches 42 face each other, and the two notches 42 are combined to form one sieve hole. Further, FIG. 5 shows a ceramic tile 51 having a through hole 52 formed in its center. The through holes 52 of the ceramic tile 51 directly serve as sieve holes.

Further, in the above embodiment, the protrusion is integrally provided with the mold, but instead of the protrusion, although not shown, it is also possible to use something like a waste material separate from the mold. When using sacrificial material, the bottom surface of the cavity of the mold remains flat without protrusions being formed, and during molding, the sacrificial material is placed in the portion corresponding to the protrusion, and the sacrificial material is discarded after molding.

Effects of the Invention According to the present invention, the ceramic tile positioning protrusion that enters into the portion of the perforated plate that should become the sieve hole is provided on the bottom surface of the upward cavity of the rubber vulcanization mold. Since it can be molded into any position and shape and supports ceramic tiles by vulcanization of rubber, perforated plates can be produced in large quantities at low cost.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a plan view of a perforated plate manufactured by the apparatus according to the invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. A vertical sectional view of the rubber vulcanization mold of the apparatus, FIG. 4 is a plan view showing a modified example of the ceramic tile, and FIG. 5 is a plan view showing another modified example of the ceramic tile. 11...Ceramic layer, 12...Rubber layer, 21
...Sieve hole, 22...Ceramic tile, 23
...sieve hole, 31 ... mold, 32 ... cavity, 33 ... protrusion.

Claims (1)

[Claims] 1. A ceramic layer 11 having sieve holes 21;
A rubber layer 12 having sieve holes 23 formed on the lower surface of the ceramic layer 11 and communicating with the sieve holes 21.
The ceramic layer 11 is the rubber layer 1.
2 is a device for manufacturing a perforated plate for a vibrating sieving machine, which is made of a plurality of ceramic tiles 22 that are joined to each other but adjacent ones are not joined to each other, and the upwardly facing cavity 3 of a mold 31 for rubber vulcanization molding.
Ceramic tile positioning protrusion 3 that fits into the part that should become the sieve hole 21 of the perforated plate on the bottom surface of 2.
Manufacturing equipment equipped with 3.