JP2654192B2 - Rectifier plate for extrusion of fiber cement material - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow straightening plate for extruding a fiber cement material into which fibers are kneaded, and more particularly, to an extrusion hole in which fibers kneaded into a fiber cement material are extruded. The present invention relates to a technique for avoiding occurrence of poor extrusion due to clogging.

[Related Art] Conventionally, a straightening plate for extruding a fiber cement material into which fibers are kneaded is formed by forming a large number of circular extrusion holes 3 in a flat straightening plate body 1 as shown in FIG. It is.

[Problems to be Solved by the Invention] However, in the case where a large number of circular extrusion holes 3 are formed in the flat plate-shaped current plate main body 1 as described above, the fibers a are caught on the edges of the extrusion holes 3 and grow. As a result, there is a problem that the diameter of the extrusion hole 3 is reduced, and finally the extrusion hole 3 is closed, resulting in poor extrusion.

The present invention has been made in view of such a problem, and an object of the present invention is to prevent the fibers from being caught on the edge of the extrusion hole and to be blocked by the growth of the fibers caught in the extrusion hole. An object of the present invention is to provide a rectifying plate for extrusion molding of a fiber cement material, which can prevent the occurrence of poor extrusion and prevent the occurrence of poor extrusion.

Means for Solving the Problems The current plate for extrusion molding of the fiber cement material of the present invention is formed in a funnel shape so that the current plate main body 1 projects toward the center in the extrusion direction downstream in the extrusion direction. A through hole 2 is formed at the center of the main body 1, and a slit-shaped extrusion hole 3 is formed radially around the through hole 2 so as to communicate with the through hole 2.

[Operation] As described above, the current plate main body 1 is formed in a funnel shape so as to protrude toward the downstream side in the pushing direction toward the center thereof, and the through hole 2 is formed in the central portion of the current plate main body 1. The slit-shaped extrusion holes 3 are formed radially around the through-holes 2 so that the fibers caught at the edges of the slit-shaped extrusion holes 3 are formed in the funnel-shaped straightening plate main body 1. The fibers are moved toward the funnel-shaped center along the edge of the slit-shaped extrusion hole 3, and the fibers are extruded from the central through-hole 2,
As described above, the fibers are not caught on the edge of the extrusion hole 3 and are prevented from growing and clogging the extrusion hole 3.

Examples Examples of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an extruder in which a cement material is kneaded by kneading fibers such as polypropylene and pulp by rotating a screw 5 in a kneading chamber 4. Is provided with a rectifying plate A, a fiber cement material is extruded from a plurality of extrusion holes 3 formed in the rectifying plate A, and is extruded from the die 6 into, for example, a plate shape.

The current plate main body 1 of the current plate A is formed in a funnel shape so as to project toward the downstream side in the pushing direction toward the center. A through hole 2 is formed at the center of the current plate body 1. This through hole 2
A slit-shaped extrusion hole 3 is formed radially around the through hole 2 so as to communicate with the through hole 2. In such a slit-shaped extrusion hole 3, a small piece 8 having a sharp tip and a piece 9 longer than the small piece 8 are attached to a cylindrical casing 7 with bolts 10, and a slit-shaped extrusion hole is provided between the small piece 8 and the long piece 9. A hole 3 was formed, and a through hole 2 was formed at the center. Thus, even if the fiber cement material is extruded toward the current plate A by the rotation of the screw 5, and the fibers are caught on the edge of the slit-shaped extrusion hole 3, the fibers are still funnel-shaped. The fiber is moved toward the funnel-shaped center along the edge of the slit-shaped extrusion hole 3 of the main body 1, and the fiber passes through the central through-hole 2.
And the extrusion hole 3 is not clogged from its edge.

[Effects of the Invention] In summary, according to the present invention, the current plate main body is formed in a funnel shape so as to protrude toward the center in the extrusion direction downstream, and a through hole is formed in the central portion of the current plate main body. Since the slit-shaped extrusion hole is formed radially around the through hole, the fibers caught on the edge of the slit-shaped extrusion hole are funnel-shaped. The fiber is extruded from the central through-hole along the edge of the hole toward the funnel-shaped center and has the advantage that the extruded hole is not clogged.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of an extruder according to one embodiment of the present invention, and FIG.
FIG. 3 is a front view of the above-mentioned current plate, FIG. 3 is a cross-sectional view of the same, and FIG. 4 is a cross-sectional view of a conventional example, where 1 is a current plate main body, 2 is a through hole, and 3 is an extrusion hole.

Claims (1)

(57) [Claims] A straightening plate for extruding a fiber cement material into which fibers are kneaded, wherein the straightening plate body is formed in a funnel shape so that its center portion protrudes downstream in the extrusion direction.
A through hole is formed at the center of the current plate body, and a slit-shaped extrusion hole is formed radially around the through hole so as to communicate with the through hole. rectifier.