JPH0410006Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a brick forming device, and more particularly to a special brick forming device for special bricks having a protrusion on the lower surface.

BACKGROUND TECHNOLOGY When molding a special brick having a protrusion on the lower surface, when clay is put into a mold as usual, the compression molding density of the clay becomes uneven between the flat part and the protrusion. Therefore, conventionally, the amount of clay put into the mold was determined by adding a predetermined amount of clay to the protruding part of the special brick according to the compression ratio of the clay, but the added clay It is difficult to stably form special bricks with uniform density because they become piles or flow to the sides due to vibrations, etc., and special bricks tend to crack at protruding parts, making it difficult to form strong bricks. That was difficult.

By the way, as an apparatus for manufacturing special bricks with uniform density, a special brick forming apparatus disclosed in Japanese Patent Publication No. 58-27083 is known. In this special brick forming machine, a rod for pressure forming the protruding part of the special brick is installed in the lower punch of the forming machine, and the protruding part of the special brick is pressurized to the same final compression ratio as other parts. It is made to be moldable.

Problems to be solved by the invention However, with the above-mentioned special brick forming equipment, conventional general-purpose brick forming equipment cannot be used as is, and considerable modification is required to use conventional general-purpose brick forming equipment. However, it was not easy to do, and the cost of modification was high.

Means for Solving the Problems The present invention was developed in view of the above-mentioned problems.In order to solve the above-mentioned problems, the lower mold plate of a special brick mold having a protrusion on the lower surface is protruded. An opening is formed in the part corresponding to the part to form a flat plate, and a mold member for forming a protrusion is provided in the opening so that it can be freely fitted, and the lower mold plate is elastically attached to the lower press block of the brick forming apparatus. The elastic material is attached at a predetermined step to the mold part for forming the protrusion part through the material, and the elastic material is set at a predetermined level so as to keep the final compression ratio of the clay for forming special bricks put into the mold constant. To provide a special brick forming apparatus characterized in that the brick is made of a material having an elastic modulus of .

Function According to the present invention, when clay is uniformly charged into a mold at a predetermined height and pressure-formed, the elastic material with a predetermined elastic modulus provided on the lower mold plate forms a flat surface. The amount of clay added to the parts and protrusions can be proportional to the final compression ratio of the special brick, and the compression density of the flat part and the protrusions is the same, making it possible to stably form a molded body that is uniform throughout. It can be molded by In addition, unlike the special brick forming equipment mentioned above, there is no need for major modifications.
It can be easily and inexpensively modified by simply attaching simple members such as an elastic material and a mold part for forming protrusions to the lower press block, and conventional general-purpose brick forming equipment can be used almost as is.

Examples The present invention will be described below based on examples.
FIG. 1 and subsequent figures show an embodiment of the present invention. As shown in FIG. 1, the brick forming apparatus 1 includes a lower press block 4 which can be pushed up a predetermined amount by a push-up cylinder 3 on a lower table 2, and a pressure device (not shown), which is an impact type screw pressing means, arranged above. A plunger 6 is disposed on the upper press block 5 which can be pushed down and pressurized freely, the lower mold plate 7 is attached to the lower press block 4, and the upper mold plate 8 is attached to the plunger 6.
and attach these to the cavity part 10 of the mold 9.
A required special brick 11 is formed so as to be able to be press-formed in opposition to it. The special brick 11 is like a sliding plate of a sliding nozzle, and has a horizontally long octagonal shape as shown in FIGS. 2 and 3, and has a slightly eccentric circular protrusion 1 on its lower surface.
2 is installed protrudingly. In order to mold this special brick 11, the lower mold plate 7 has the outer shape of the special brick 11 with a flat upper surface as shown in FIGS. 1, 4, and 5, and the protruding part of the special brick 11 An opening 13 that conforms to the outer shape of the protrusion 12 is formed at a position corresponding to the protrusion 12, and a protrusion forming mold member 14 is formed so as to be fitable therein. The protrusion forming mold member 14 of the lower mold plate 7 is fixed to the end face of the lower press block 4 with a fixing device (not shown) such as a bolt.
The flat part 15 of the lower mold plate 7 is horizontally spaced from the lower press block 4 by elastic members 16 such as coil springs arranged at regular intervals as shown in FIGS. 4 and 5. I try to support it in the same way. The elastic material 16 has a compressive strength that can withstand the total weight of the lower mold plate 7 and the weight of the clay 17 to be charged.
The elastic modulus is such that it can be compressed under the preload of the upper press block 5, and the lower mold plate 7 is inserted into the recessed part 18 opened at the end face of the lower press block 4 as shown in the figure.
It is inserted into the support rod 19 screwed onto the lower mold plate 7 in the same way as the protrusion forming mold member 14 during molding.
is brought into close contact with the end face of the lower press block 4. The lower mold plate 7, which is supported by the elastic material 16 with a step difference from the protrusion forming mold member 14, is provided with compression ratio adjusting tools 20 such as bolts at symmetrical positions in the front, rear, left and right directions. At the same time, the compression ratio adjuster 20 is inserted into a compression ratio adjustment opening 21 recessed in the lower press block 4 and locked with an adjusting part 22 such as a nut.
The lower mold plate 7 can be adjusted to a predetermined height by the adjustment part 22 against the upward force of the elastic material 16, and the clay for forming bricks is introduced into the cavity part 10 of the mold 9. Special brick with compression ratio of 17
The clay 17 can be placed so that it is the same on the flat part 23 and the protruding part 12 of 1.

Then, by adjusting the adjustment part 22 of the compression ratio adjustment tool 20, the amount of clay 17 to be charged into the protrusion forming mold part 14 of the lower mold plate 7 as shown in FIG. 1 is adjusted, for example, as shown in FIG. The height Z of the lower mold plate 7 is set so that the height Z is 2Y, which is twice the protrusion amount Y of the protrusion part 12 of the special brick 11. In addition, as shown in FIGS. 1 and 7a, the clay 17 is placed on the lower mold plate 7 on the flat surface 2 of the special brick 1.
Pour in 2X amount, which is twice the thickness of Step 3.

As shown in Fig. 7b, when the upper press block 5 is lowered to compress the clay 17, the supporting force of the elastic material 16 is small, so the elastic material 16 contracts instantly, as shown in Fig. 7c. Thus, the lower mold plate 7 is in close contact with the lower press block 4. Subsequently, the upper press block 5 is pressurized by impact-type screw pressurization, and the clay 17 is compressed by an amount of X at the plane portion 23 and an amount of X+Y at the protrusion portion 12, thereby forming the molded material. After the molding is completed, the upper press block 5 is raised and the lower press block 4 is pushed up to the top of the mold 9 as shown in FIG. The special brick 11 thus made is in a state where it is easy to separate from the lower mold plate 7. Special brick 1 with a pick-up device (not shown)
1 is taken out and the special bricks 11 are sequentially formed as described above.

The results of measuring the bulk specific gravity after firing of the special brick molded in this way and the special brick molded by adding an appropriate amount of conventional clay to the protruding parts are as follows.
As shown in Figure 8. Note that an alumina-mullite-carbon material is used as the fireproof material.

As is clear from Fig. 8, in the special brick according to the present invention, both the flat part and the protruding part are pressurized to the same compression ratio,
There is no variation in the density of the bricks as a whole, and a tough and homogeneous molded body can be obtained.

In addition, the clay can be added in the same way as the conventional automatic charging method for ordinary bricks, and when the bricks are taken out, the special bricks are placed on the lower mold plate as described above, so it is possible to use the pick-up device. It can also be taken out easily.

In the above example, the compression ratio of the clay was set to 1/2 for ease of explanation, but it is also possible to calculate the compression ratio and set the lower mold plate to a predetermined height using a compression ratio adjuster. Pressure molding can be performed to a predetermined compression ratio as appropriate.

Effects of the Invention As described above, in the present invention, the flat part of the lower mold plate is floated by a predetermined amount on the lower press block of the brick forming machine via an elastic material, and the mold is placed in the cavity part of the mold. By placing the bricks at a predetermined height, the flat and protruding parts of the special bricks can be pressurized with the same compression ratio without any difference in compression ratio, and the special bricks can be molded with uniform density throughout. , it is possible to produce tough and homogeneous molded bodies. What's more, since simple parts such as elastic materials such as coil springs and compression ratio adjusters such as bolts are installed between the lower mold plate and the lower press block, conventional general-purpose brick forming equipment can be greatly modified. It can be easily and inexpensively modified without having to do anything, and it is possible to form special bricks economically.

[Brief explanation of drawings]

Figure 1 is a partially omitted side sectional view of an embodiment of the present invention, Figures 2 and 3 are side and bottom views of the special brick, and Figures 4 and 5 are the lower mold of the present invention. A plan view and a side sectional view of the plate part, FIG. 6 is a side sectional view of the compression ratio adjustment part of the same as above, FIG. FIG. 3 is an explanatory diagram comparing the bulk specific gravity of the special bricks of the present invention and the conventional ones after firing. DESCRIPTION OF SYMBOLS 1...Brick forming device, 4...Lower press block, 7...Lower mold plate, 9...Mold, 11...Special brick, 12...Protrusion, 13...Opening, 14...
...Mold member for forming protrusion part, 15...Plane part, 16
... Elastic material, 17 ... Clay, 20 ... Compression ratio adjuster, 23 ... Plane part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A lower mold plate of a special brick mold having a protrusion on the lower surface is formed into a flat plate by opening an opening in the part corresponding to the protrusion, and A mold member for forming a protrusion is provided so as to be freely fitable, and the lower mold plate is attached to a lower press block of a brick molding device via an elastic material with a predetermined step difference relative to the mold member for forming a protrusion. A special brick forming apparatus characterized in that the elastic material is made of a material having a predetermined elastic modulus so that the final compression ratio of the special brick-forming clay charged into the mold is constant. (2) The elastic material has a strength that is greater than the weight of the lower mold plate and the weight of the clay to be added, but less than the pressure force that presses the mold part for forming the protrusion, and has elasticity. 2. The special brick forming apparatus according to claim 1, which is a utility model and is equipped with a compression ratio adjuster so that the height of the lower mold plate can be variably set against the pressure of the material.