JPS6223707A - Manufacture of cement extrusion molded shape - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a method for manufacturing a flat cement extrusion molded product used as a building panel or the like.

[Backweight Technology J Flat cement extrusion molded products used as construction panels, etc. are made using cement as a base material, and are made by kneading lightweight aggregates, reinforcing fibers, water, plasticizers, etc. into 3Il*. It can be obtained by extruding the molding material from a mold of an extruder. By using such an extrusion molding method, a cement molded product with an irregular cross section is produced, as shown in FIG. 3 can be obtained, and the architectural panel formed in this way can be stably connected by fitting the male protrusion 8 and the female concave line 9. Furthermore, by performing extrusion molding, it is possible to form a cavity 10 that spans the entire length, making it possible to reduce the weight even in the form of a thick inner plate, and by filling this cavity 10 with a heat insulating material, a heat insulating function can be imparted. It will also be possible to do so.

Although molding the cement molded product 3 by extrusion has the above-mentioned advantages in addition to production efficiency, there are some problems that arise in the extrusion molding process. That is, as shown in FIG. 4, a cement molding material is discharged from a mold 2 at the tip of an extrusion molding machine 1, and a cement molded product 3 is extruded onto a receiving conveyor 4 such as a roller conveyor 4a or a belt conveyor 4b to be received. The cement molded product 3 is picked up by the conveyor 4 and conveyed to the next process such as cutting and curing, but at this time, the cement molded product 3 tends to warp and bend on the receiving conveyor 4 in a meandering manner. Normally, the length l of cement molded product 3 is 3000ffla.
In the case of +, the warpage ε occurs in about several lll11. This warpage is thought to be caused by a combination of various phenomena, but the main cause is that when the discharge port of the mold 2 has an irregular cross section, the flow resistance of the cement molding material within the mold 2 is uneven. As a result, the amount of cement molding material flowing out from the mold 2 becomes uneven, and the cement molded product 3 extruded from the mold 2 is in a flexible state with uncured and unhardened mortar. It is thought that uneven force acts on item 3, causing the warpage.

When the cement molded product 3 is warped in this way, this warpage remains in the architectural panel as a product.
The fit between the male protrusion 8 and the female concave line 9 may be poor, resulting in a gap at the joint, which may cause problems such as poor rain drainage and deterioration of the appearance. This increases the incidence of non-defective products.

[Objective of the Invention J The present invention has been made in view of the above points, and an object of the present invention is to provide a method for manufacturing a cement extrusion molded product that can be molded without the fear of warping or bending. The purpose is to

[Disclosure of the Invention] According to the method for manufacturing a cement extrusion molded product according to the present invention, a plate-shaped cement molded product 3 is moved from a mold 2 of an extrusion molding machine 1 with its lower surface in the width direction, and is placed against a horizontal surface. The cement molded product 3 is extruded onto the receiving conveyor 4 in an inclined state, and the receiving conveyor 4 is arranged to be inclined with respect to the horizontal plane at the same angle as the inclination of the cement molded product 3. At the same time, a guide 5 along the extrusion direction is provided at the inclined lower end position of the receiving conveyor 4. The cement molded product 3 is moved in the extrusion direction on the receiving conveyor 4 while one side end surface of the extruded cement molded product 3 is brought into contact with the guide 5, and the cement molded product 3 is tilted. The cement molded product 3 is pushed out in this state and moved on the receiving conveyor 4 in an inclined state so that the side end surface of the cement molded product 3 comes into contact with the guide 5 due to the weight of the cement molded product 3 due to the inclination. The cement molded product 3 can be extruded without warping along the curve.The present invention will be described in detail below with reference to Examples.

The mold 2 attached to the tip of the extrusion molding machine 1 is provided with a discharge port (not shown) in the form of a horizontally long slit, and this discharge port is inclined with respect to the horizontal plane. In front of this mold 2, as shown in FIG. 1(a), a roller conveyor 4 is disposed, as shown in FIG. 1 (b) at the same inclination angle as the discharge port of the mold 2.
), it is inclined with respect to the horizontal plane. At this time,
The inclination angle of the discharge port of the mold 2 and the inclination angle of the receiving conveyor 4 vary depending on the softness of the cement molding material, the thickness of the cement molded product 3, the side shape of the cement molded product 3, the extrusion speed, etc., but usually they are 60° or less, preferably 45° or less, more preferably 15° to 35°
It is best to set it to °.

If the angle of inclination is too large, the force of pressing the cement molded product 3 against the guide 5, which will be described later, will be too large, which may cause crushing deformation of the cement molded product 3 at the side end surface.If the angle of inclination is too small, the cement molding There is a possibility that the effect of preventing the product 3 from warping and bending may become insufficient. Also,
A guide formed by a long plate-shaped guide plate 6 parallel to the extrusion direction of the cement molded product 3 is provided on the upper surface side of the inclined lower end of the receiving conveyor 4 at a position corresponding to one side end of the discharge port of the mold 2. 5 is disposed, and this guide 5 is erected at right angles to the upper surface of the receiving conveyor 4. Here, the guide plate 6 is preferably formed of a material having low contact frictional resistance with the cement molded product 3, for example, polyethylene or polypropylene.

For example, when extrusion molding a cement molded product 3 having a cross-sectional shape as shown in Fig. The molded material is extruded from a mold 2 of an extrusion molding machine 1. At this time, from mold 2 to cement molded product 3
will be pushed onto the receiving conveyor 4 with its width direction inclined with respect to the horizontal plane, and will be sent on the receiving conveyor 4 with its width direction inclined with respect to the horizontal plane. Since the cement molded product 3 is in an inclined state on the receiving conveyor 4 in this way, a force of sliding downward on the receiving conveyor 4 due to its own weight acts on the cement molded product 3, and this force causes the cement molded product to The receiving conveyor 4 immediately moves along the guide 5 in the extrusion direction without touching one side end surface of the conveyor 3 or the inner surface of the guide 5.
It will be sent by.

At this time, even if a force is applied to the cement molded product 3 to prevent the cement molding material from being extruded unevenly from the discharge port of the mold 2, which has an irregular cross section, the cement molded product 3 is received in an inclined state. To be sent on conveyor 4,
The force of sliding downward on the receiving conveyor 4 due to its own weight is constantly acting on the cement molded product 3, and the cement molded product 3 does not warp and one side end surface of the cement molded product 3 is aligned with the inner surface of the guide 5. The extrusion direction tool is immediately sent along the guide 5 by the receiving conveyor 4. Further, even if the cement molded product 3 were to warp, the side end surface of the cement molded product 3 would gradually come into contact with the guide 5 due to sliding due to its own weight, and the warp would be corrected. The cement molded product 3 extruded in this way is cut 8!1
2, it is cut into a predetermined size, transferred to a pedestal, and supplied to the next process such as curing.

FIG. 2 shows another embodiment of the present invention, in which a pulley 1 is provided in the same manner as the one in FIG.
3, but the gamma id 5 is formed with the id belt 7, and in this case, the side end surface of the extruded cement molded product 3 is formed by the cement molded product 3.
The cement molded product 3 and the guide plate 6 in the embodiment shown in FIG. The effects of friction can be avoided.

[Effects of the Invention] As described above, in the present invention, a plate-shaped cement molded product is extruded from a mold of an extrusion molding machine onto a receiving conveyor with its lower surface inclined with respect to a horizontal plane in the width direction, The receiving conveyor is arranged to be inclined with respect to the horizontal plane at the same angle as the inclination of the cement molded product, and a guide along the extrusion direction is provided at the lower end position of the receiving conveyor, so that the extruded cement molded product is Since it is moved in the extrusion direction on the receiving conveyor while being in contact with the guide, even if a force is applied to the extruded cement molded product to warp it, the cement molded product that is sent in an inclined state on the receiving conveyor has its own weight. The force of sliding downward on the receiving conveyor is constantly acting on the cement molded product, and the cement molded product is extruded along the guide until one side end surface of the cement molded product comes into contact with the inner surface of the guide without warping or bending. It is directly sent by the receiving conveyor, and even if the cement molded product is warped, the side end surface of the cement molded product will gradually come into contact with the guide due to sliding due to its own weight, and the warp will not occur. This is something that will be corrected.

[Brief explanation of drawings]

Fig. 1 (aHb) is a plan view and a side view of one embodiment of the present invention, Fig. 2 is a plan view of another embodiment of the above, Fig. 3 is a perspective view of a cement molded product, and Fig. 4 is a conventional FIG. 3 is a plan view of an example. 1 is an extrusion molding machine, 2 is a mold, 3 is a cement molded product, 4
is a receiving conveyor, and 5 is a guide.

Claims (1)

[Claims] (1) Extrude a plate-shaped cement molded product from the mold of an extrusion molding machine onto a receiving conveyor with its lower surface inclined with respect to the horizontal plane in the width direction, and move the receiving conveyor at the same angle as the inclination of the cement molded product. A guide is provided at the lower end of the receiving conveyor to extend in the extrusion direction, and the extruded cement molded product is placed on the receiving conveyor in the extrusion direction with one side end surface in contact with the guide. A method for producing a cement extrusion molded product, which comprises moving the product.