JPH069810B2 - Cement extruded product manufacturing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for manufacturing a cement extrusion molded article used as a building material or the like.

[Background Art] In manufacturing cement molded products, it is becoming popular to use extrusion molding because of its excellent production efficiency. When a cement molded product is produced by extrusion molding, the cement molded product is formed on the same cross section over the entire length, and it is not possible to form an intermittent uneven pattern on the cement molded product. Then, as shown in FIG. 3, the cement molded product 7 immediately after being extruded is formed with the patterning projection 1
2 through the embossing roll 9 having the embossing roll 9 and the patterning projection 12 of the embossing roll 9 forms an intermittent pattern concave portion 8 as shown in FIG. It is arranged on the surface.

However, when the pattern recess 8 is formed on the surface of the cement molded product 7 by the pattern projection 12 of the embossing roll 9 as described above, the pattern recess 8 is formed by pressing the pattern projection 12. Patterned protrusion 1
The cement molding material of the portion pressed by 2 is shown in Fig. 4 (a) (b).
As shown in FIG. 4, the peripheral edge of the pattern concave portion 8 bulges on the surface of the cement molded product 7, and therefore the bulge 13 makes it difficult to form the cement molded product 7 with a uniform thickness. is there.

[Object of the Invention] The present invention has been made in view of the above points, and a cement extrusion molded article capable of forming a pattern concave portion on a cement molded article by an embossing roll without forming a raised portion at a peripheral edge portion. It is intended to provide a manufacturing apparatus.

DISCLOSURE OF THE INVENTION The apparatus for producing a cement extrusion molded article according to the present invention, however, has a molding die 4 provided with an extrusion port 3 through which the cement molding material 2 attached to the front end of the extrusion molding machine 1 passes.
And a preliminary concave portion forming tool 6 for forming a preliminary concave portion 5 on the surface of the cement molded product 7 which is mounted in the molding die 4 and is intermittently driven to project into the extrusion port 3 to be extruded through the extrusion port 3. , The molding die 4 disposed in front of the molding die 4
The embossing roll 9 for forming the pattern concave portion 8 in the preliminary concave portion 5 is provided on the surface of the cement molded product 7 extruded from the extrusion port 3 of the above, and is mounted in the molding die 4. The above-described object is achieved by preliminarily providing the preliminary concave portion 5 on the surface of the cement molded product 7 by the preliminary concave portion forming tool 6, and the present invention will be described in detail below with reference to examples.

The molding die 4 is attached to the front end of the extrusion molding machine 1, and the extrusion port 3 opened at the front end of the molding die 4 is communicated with the inside of the extrusion molding machine 1 as shown in FIG. The front end portion of the molding die 4 is provided with recesses 14 which are open forward and whose lower surface is opened into the extrusion port 3 at a plurality of locations along the flat extrusion port 3 as shown in FIG. 2 (a). A central portion of a flat plate-shaped preliminary recess forming tool 6 is attached to the inside of the recess 14 by a shaft pin 15 in a state where the lower surface opening to the extrusion port 3 is closed. And, it is swingable and rotatable in the vertical direction. By rotating the front end of the preliminary recess forming tool 6 downward, the front end of the preliminary recess forming tool 6 projects into the extrusion port 3. The state in which the front end projects downward and the preliminary recess forming tool The preliminary recess forming tool 6 is rotated between the state where 6 is returned to the horizontal state.

A connecting plate 17 is rotatably connected to the rear end of the preliminary recess forming tool 6 with the lower end inserted into the recess 16 of the preliminary recess forming tool 6, and the connecting plate 17 is a molding die. 4 through holes 1
The upper end portion is projected above the molding die 4 through 8. On the upper surface of the molding die 4, a plurality of drive plates 20 whose central portions are rotatably supported by bearings 19 are attached so as to be capable of swinging up and down about the bearings 19, and one end of each drive plate 20 is a spare. It is rotatably connected to the upper end of a connecting plate 17 connected to the recess forming tool 6. The rear end of each drive plate 20 is integrally connected by a connecting bar 21, and a passive plate 22 is projected rearward from the connecting bar 21 as shown in FIG. 2 (b). A prime mover 23 is attached to the upper surface of the molding die 4, an output shaft 25 supported by a bearing 24 is connected to the prime mover 23, and a cam 26 is attached to the tip of the output shaft 25. The cam 26 is provided in contact with the upper surface of the passive plate 22.

As shown in FIG. 1, a receiving roll 28 and an embossing roll 9 on the upper side of the receiving roll 28 are rotatably driven in front of the molding die 4. On the outer periphery of the embossing roll 9, a patterning protrusion 12 is provided so as to correspond to the preliminary recess forming tool 6.

Therefore, when the cement molded product 7 is molded by the device formed as described above, first, the cement molding material 2 is passed from the extrusion molding machine 1 to the extrusion port 3 of the molding die 4 to obtain the cement molded product 7. Although it is pushed out, the cam 26 is rotationally driven by the driving of the prime mover 23 at this time, and the passive plate 22 is pressed by the cam 26 at regular time intervals, and the drive plate 20 is rotated so that its tip portion moves upward. Then, as the tip of the drive plate 20 moves upward, the connecting plate 17
The preliminary recess forming tool 6 is rotated so as to move the rear part upward, and by this rotation, the tip of the preliminary recess forming tool 6 is rotated downward and protrudes into the extrusion port 3 to open the extrusion port 3. As shown in FIG. 1, a preliminary recess 5 is formed in a portion of the surface of the cement molded product 7 which is molded by passing through the preliminary recess molding tool 6. When the pressing of the passive plate 22 is released by the rotation of the cam 26, the upper surface of the molding die 4 and the passive plate 22 are released.
The passive plate 22 is returned to its original state by a return spring 27 provided between the drive plate 20 and the front portion of the drive plate 20 and the preliminary recessed part forming tool 6 is moved upward to form a concave portion. After returning to the place 16, the tip of the preliminary recess forming tool 6 does not project into the extrusion port 3, and the preliminary recess 5 is not formed on the surface of the cement molded product 7. Cam 2 like this
With the rotation of 6, the preliminary recess forming tool 6 intermittently projects into the extrusion port 3 at regular intervals, and the preliminary recesses 5 are intermittently formed on the surface of the cement molded product 7 at a constant pitch. Will be done.

As described above, the cement molded product 7 extruded from the molding die with the preliminary recesses 5 provided on the surface at a constant pitch is
Then, it is passed between the embossing roll 9 and the receiving roll 28. The embossing roll 9 is rotationally driven so that the peripheral speed is synchronized with the extrusion speed of the cement molded product 7, and the outer peripheral length is made substantially equal to the pitch length of the preliminary recesses 5 provided in the cement molded product 7. When the cement molded product 7 is passed through the embossing roll 9, the patterning projections 12 are provided at the timings corresponding to the respective preliminary recesses 5. Therefore, the patterning projection 12 of the embossing roll 9 presses the surface of the cement molded product 7 so as to fit into each preliminary recess 5, and the patterning recess 8 is formed by the patterning projection 12 at the portion of the preliminary recess 5. Will be done. The preliminary recess 5 has a smaller area and a smaller depth than the pattern recess 8.
By forming the pattern recessed portion 8 by the patterning projection 12 at the portion, it is possible to form the pattern recessed portion 8 as an accurate pattern and form the uneven pattern on the surface of the cement molded product 7. The cement molded product 7 on which the pattern concave portion 8 is formed is sent to the next step by the take-up conveyor belt 29.

[Advantages of the Invention] As described above, in the present invention, the preliminary concave portion is provided on the surface of the cement molded product which is mounted in the molding die and is intermittently driven to project into the extrusion port and extruded through the extrusion port. A preliminary concave portion forming tool to be formed, and an embossing roll for forming a pattern concave portion in the preliminary concave portion on the surface of the cement molded article which is arranged in front of the molding die and extruded from the extrusion port of the molding die A cement molded product can be extruded and molded with a recessed part forming tool intermittently provided with a preliminary recessed part, and a pattern recessed part is formed by pressing with an embossing roll at the part of the preliminary recessed part provided on the surface of this cement molded product. In this case, the amount of cement molding material pressed by the embossing roll is reduced, and the cement molding material rises in the peripheral edge of the pattern recess. Therefore, it is possible to prevent the thickness of the cement molded product from becoming uneven.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIGS. 2 (a) and (b) are front views and a plan view of the same, and FIG. 3 is a state in which a pattern recess is formed in a cement molded product by an embossing roll. Sectional views, and FIGS. 4 (a) and 4 (b) are a perspective view and an enlarged sectional view showing problems in the conventional example. 1 is an extrusion molding machine, 2 is a cement molding material, 3 is an extrusion port, 4 is a molding die, 5 is a preliminary concave portion, 6 is a preliminary concave portion molding tool, 7 is a cement molded product, 8 is a patterned concave portion, 9 is an embossing roll. Is.

Claims (1)

[Claims] 1. A molding die which is attached to a front end of an extrusion molding machine and has an extrusion port through which a cement molding material is passed,
A preliminary recess forming tool for forming a preliminary recess on the surface of a cement molded product that is mounted in the molding die and is driven to intermittently project into the extrusion port and is extruded through the extrusion port, and is arranged in front of the molding die. An apparatus for producing a cement extrusion molded article, comprising: an embossing roll for forming a pattern recess in a preliminary recess on the surface of the cement molded article extruded from the extrusion port of the molding die.