JPS6329523Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Purpose of the invention" (Field of industrial application) The present invention is a method of squeezing clay raw materials into sausage shapes to continuously form a large number of wet molded products. This invention relates to a molding device.

(Prior art and its problems) Granular clay or powdered clay used in dry pressure molding etc. is obtained by drying and pulverizing a wet molded product.
Conventionally, the wet molded products have been formed by squeezing clay raw materials using an extrusion molding apparatus 1 shown in FIG. 3, an extrusion molding apparatus 6 shown in FIG. 4, or the like.

In the drawing apparatus 1 shown in FIG. 3, two cylindrical raw material transfer tanks 2, 2 are horizontally installed parallel to each other, and a rotatable spiral shaft 4 is provided in each raw material transfer tank 2, 2. will be included. The raw material transfer tank 2 has one end closed to form a forming plate 3, and the forming plate 3 has a large number of squeeze holes 3a, 3a, . . .
are drilled in a distributed manner. This squeeze molding device 1
When the clay raw material is supplied to the raw material input port 5, the raw material is transported toward the forming plate 3 of the raw material transfer tank 2 along the rotation of the spiral shaft 4. Then, the moving raw material that is continuously supplied later pushes against the staying raw material that is about to stay in the vicinity of the forming plate 3, and wet-formed products are produced separately from each squeeze hole 3a, 3a, ... of the forming plate 3. It's starting to squeeze out more.

The drawing device 6 shown in FIG. 4 is installed at an inlet part of a carry-out conveyor 11, etc., and is composed of a fixed cylindrical body 7 with a scraping plate 10 protruding in the circumferential direction, and It consists of an extrusion blade 8 which rotates within the body 7 and has an S-shaped planar view, and a rotating disk 9 which rotates at a slow speed in the opposite direction to the extrusion blade 8. The fixed cylindrical body 7 has a large number of squeeze holes 7a, 7 on the lower side of the circumferential surface.
a,... are drilled in a distributed manner. The extrusion molding device 6 rubs the clay raw material against the inner circumferential surface of the fixed cylindrical body 7 by rotating the extrusion blades 8 .
The wet molded product squeezed onto the outer peripheral surface of the fixed cylindrical body 7 falls onto the rotating disk 9 due to its own weight, and is carried in an arc shape on the rotating disk 9. Then, it is guided by the scraping plate 10 of the fixed cylindrical body 7 and transferred to the carry-out conveyor 11.

(Problems to be solved by the invention) The drawing apparatus 1 shown in FIG. becomes longer. For this reason, when switching raw materials, a large amount of raw materials remaining in the raw material transfer tank 2 must be wasted. However, 1 ton of raw materials remained. Furthermore, the switching operation took a long time of 15 minutes, as it required removing all remaining raw materials. Furthermore, since the raw material transfer tank 2 and the spiral shaft 4 are long, if the helical blades of the spiral shaft 4 are worn out or damaged, it is extremely difficult to disassemble, repair, and assemble them.

The squeeze molding device 6 shown in FIG. 4 is designed to solve the problems of the squeeze molding device 1 (see FIG. 3). However, this squeeze molding device 6
In this case, the raw material often remained around the rotating shaft of the extrusion blade 8, resulting in poor yield. Moreover, since the extrusion blade 8 has a complicated S-shaped planar shape as described above, if its lower end surface is worn away by the raw material between it and the fixed cylindrical body 7, the extrusion blade 8 This had the disadvantage that the entire wing 8 had to be replaced.

The present invention was made in view of the above circumstances, and it solves various problems that were considered to be fatal due to the structure of the conventional drawing machine (see Fig. 3 and Fig. 4). The object of the present invention is to provide a novel clay raw material squeezing molding device that solves all problems and can be expected to operate smoothly in forming wet molded products.

"Structure of the invention" (Means for solving the problems) The gist of the drawing device of the present invention is that it includes a disk-shaped bottom forming plate in which a large number of drawing holes are arranged in a distributed manner, and It consists of a shell wall that stands up around the entire circumference of the bottom molded plate, and a winding blade that rotates on the bottom molding plate along the inner circumferential cylindrical surface of the shell wall, and the winding blade is connected to the shell wall. The molding plate is provided at an angle so as to guide the clay raw material loaded therein to the bottom molding plate.

(Function) The winding blade is provided at an angle so as to guide the clay raw material to the squeezing hole of the bottom forming plate. Therefore,
The raw material in the shell wall rising around the entire circumference of the bottom forming plate is guided to the bottom forming plate so as to be generally pressed by the winding blades. In other words, the raw material once rolled up under the winding blade due to the rotation of the winding blade is always squeezed out from the bottom molding plate and molded continuously, resulting in a very high yield. Also, if we look at the movements of the original drawing machine one by one,
The amount of raw material pushed under the blade of the winding blade is small. Therefore, the raw materials lost when switching raw materials are
Only a small amount remains under the winding blade.

In addition, in the drawing forming apparatus of the present invention, if a structure is adopted in which at least the rubbing edge of the engulfing blade near the bottom molding surface is removable, even if the engulfing blade is worn, the rubbing edge can be removed. It can be easily repaired by simply replacing the parts with new ones.

(Example) The present invention will be described below based on drawings showing examples thereof.

FIG. 1 is a partially cutaway perspective view of the drawing apparatus according to the present invention. The drawing device of the present invention consists of a bottom forming plate 12, a shell wall 13, and a winding blade 14. In this embodiment, the drawing apparatus according to the present invention is installed on a suitable pedestal 15.

The bottom forming plate 12 is made of a disc-shaped plate material, and a large number of squeeze holes 12a, 12a, . . . are bored in the plate surface.

The shell wall 13 is formed in a cylindrical shape so as to rise around the entire circumference of the bottom molded plate 12.

The winding blades 14 are attached to a rotating shaft 19 that hangs down along the central axis of the shell wall 13 so as to project oppositely to both sides thereof. The winding blade 14 is composed of a blade body 14b and a rubbing edge 14a, and the upper edge of the blade body 14b is curved upward in the direction of rotation, and the rubbing edge 14a is inclined in the direction rearward in the rotation direction. It is formed like this. Further, the winding blade 14 has a rubbing edge 14a with a slight gap between it and the bottom molded plate 12, and its blade tip meets the inner circumferential surface of the shell wall 13. The same gap is maintained all around the circumference. Therefore, the winding blade 14 is connected to the rotating shaft 19
As the shell wall 13 rotates, the clay raw material loaded into the shell wall 13 is guided to the squeezing hole 12a of the bottom molding plate 12.

Note that the rubbing edge 14a of the winding blade 14 is
It is screwed onto the blade base body 14b with a suitable bolt 16, and can be attached or detached as necessary. Therefore, when the winding blade 14 becomes worn out, it is not only easy to replace it with a new one;
It has the advantage that only the rubbing edge 14a needs to be made of an expensive material with excellent wear resistance.

(Study of another aspect) The number of winding blades 14 to be attached is not limited, and for example, if the forming ability of a wet molded product is to be increased, a large number may be used; on the contrary, if such a forming ability is expected, If you don't need it, just reduce it. Of course, the outer shape and blade area of the winding blade 14 are not limited in any way. Further, when it is desired to quickly dry the wet molded product after formation, it is preferable to use a bottom molding plate 17 as shown in FIG. The bottom molding plate 1
7 is the squeezing holes 17a, 17a, . . . on the discharge surface side.
It has an expansion recess 18. The expansion recess 18
plays the role of releasing residual stress in the wet molded product after squeezing. Therefore, the wet-formed product that is squeeze-molded has some compressive stress during its molding.
It can be recovered instantaneously and the packing density will not be abnormally increased. In this way, the configuration and shape of the drawing device according to the present invention can be changed as appropriate depending on the embodiment.

"Effects of the Invention" As is clear from the above explanation, according to the squeezing apparatus for clay raw materials according to the present invention, the amount of raw material loss when switching raw materials is reduced. for example
In the case of the present drawing machine with a processing capacity of 4 tons/hr, the amount of raw material lost is only 0.2 tons.
In addition, the working time required for the changeover can be significantly shortened, and in the case of the present drawing machine having a processing capacity of 4 tons/hr, it took only 3 minutes.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the drawing device according to the present invention, Fig. 2 is an enlarged side sectional view showing another embodiment of the bottom forming plate, and Figs. 3 and 4 are the conventional drawing device. FIG. 2 is a partially cutaway perspective view of two types of squeeze molding devices. 12... Bottom molding plate, 12a... Squeezing hole, 13
...Shell wall, 14...Involving blade, 14a...Rubbing edge, 14b...Blade base body.

Claims (1)

[Claims for Utility Model Registration] 1. A disc-shaped bottom molded plate in which a large number of squeeze holes are arranged in a distributed manner, a shell wall that rises around the entire circumference of the bottom molded plate, and the shell. The winding blade rotates on the bottom molding plate along the inner circumferential cylindrical surface of the wall, and the winding blade is inclined so as to guide the clay raw material loaded into the shell wall to the bottom molding plate. 1. A device for squeezing clay raw material, characterized in that it is provided with: 2. The squeezing-molding apparatus for clay raw material according to claim 1, wherein at least the rubbing edge of the winding blade near the bottom forming plate is made removable.