JPH0639093B2 - Method of manufacturing extruded building materials - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing an extruded building material.

(Prior art and its problems) Asbestos cement materials formed by kneading asbestos and hardened cement products are formed by papermaking and extrusion molding methods, and often have a plate shape or a tubular shape.

The strength of this asbestos-cement material is lower than that of the concrete material, and the only reinforcing method is to insert the thin-diameter streaks into the uncured asbestos-cement material that has been extruded.

That is, it cannot be used as a load-bearing structural building member such as a precast concrete material, and the asbestos cement material itself is only used as a non-bearing member such as a partition wall or curtain oar.

(Means for Solving Problems) The present invention has been devised in view of the above problems, and in recent years, the compressive strength of asbestos cement materials themselves has become equal to or higher than that of concrete materials (for example, 600 Kg / c
Focusing on the m ² ) point, one end of the core material is applied to the central die provided on the discharge side of the extrusion molding machine, and the other end is supported by the support table, and the molding material is discharged from the discharge port in order. The present invention provides a manufacturing method for covering the outer circumference.

According to this manufacturing method, the outer periphery of the core material can be covered with the molding material itself in the step of extruding the molding material. It becomes a composite structural member of a molding material and a core material, and can exert structural strength similar to that of so-called reinforced concrete, in which the molding material takes compressive strength and the core material takes tensile strength.

(Example) Below, the manufacturing method of the extrusion molded material for buildings of this invention is demonstrated in detail.

FIG. 1 is a schematic side sectional view of an extruder 1 used in the invention.

This extruder 1 comprises a cylinder 11 and the cylinder 11
It consists of a pressure plate 13 driven inside by a ram 12. A center die 14 is attached to the center of the discharge side of the cylinder 11.

The center die 14 has a shape required for holding one end of the core material by applying one end of the core material as described later. Further, since the extruded molding material is coated on the outer periphery of the core material, the core material has a sectional shape substantially equal to the sectional shape of the core material. An outer peripheral die 15 is attached around the ejection side of the cylinder 11, and the central die 14 and the outer peripheral die 15 described above form an ejection port 16.
The discharge port 16 is set to have a predetermined opening area according to the thickness of the molding material that covers the outer periphery of the core material.

On the other hand, a support base 17 is arranged at a predetermined position and at a height substantially equal to that of the central die 14.

Next, a manufacturing method using the extrusion molding machine 1 will be described.

First, the one end 21 of the core material 2 is applied to and held by the center die 14. Further, the support base 17 is held in contact with the other end 22. That is, the core material 2 is held by the center die 14 and the support 17. Next, a predetermined amount of the molding material 3 is put into the cylinder 11 via a hopper (not shown) or the like. The molding material 3 is a kneaded product mainly composed of asbestos and cement, and in order to improve the strength, a part of the asbestos can be replaced with a carbon fiber material or an organic fiber material, if necessary.

To discharge the above molding material 3 from the cylinder 11,
The ram 12 is driven to press the pressure plate 13 in a predetermined direction (rightward in FIG. 1). Then, the molding material 3 is sequentially extruded from the discharge port 16.

In such a state, the outer surface of the central die 14 and the outer peripheral surface of the core material 2 are substantially flush with each other, and although not shown, the die member / conveyor belt provided on the upper and lower parts of the core material 2 is molded. Since the material 3 moves in synchronization with the extrusion (coating) speed of the material 3, the molding material 3 from the discharge port 16 advances in a state of covering the outer peripheral surface of the core material 2. The drive of the ram 12 is stopped when the other end 22 is reached.

In this state, one end 21 and the other end 22 of the core material 2 are released from the center die 14 and the support stand 17, respectively, after a lapse of a predetermined time.
Then, if necessary, a heating / humidifying / curing treatment is further performed, so that the molding material 3 has an adhesive force by itself, so that the molding material 3 adheres to the outer peripheral surface of the core material 2 as the curing progresses, and becomes a state of being entirely covered.

A rotating auger or the like is also used as a means for extruding the forming material 3.

FIG. 2 is a schematic cross-sectional view of the building extruded material A formed by the above manufacturing method.

As the core material 2, a die-shaped steel material is used alone, and the molding material 3 is coated on the outer periphery thereof. In this extruded building material A for construction, the inside of the core material 2 is hollow so that the weight can be reduced. In addition, the forming material 3 bears the compressive force, and the die-shaped steel material bears the tensile force, which makes it optimal for a shaft material such as a column material.

On the other hand, the extruded building material B for construction shown in FIG. 3 comprises a plurality of core materials 2, 2 ... A pipe steel material is used as the core material 2, and a molding material 3 is coated on the outer periphery.

Since the adjacent pipe steel materials are integrally formed by the molding material 3, they have a plate shape as a whole.

Similar to the above, the pipe steel material is used to reduce the weight, and the molding material 3 is optimal for compression, and the pipe steel material is suitable for the wall material and the floor slab, respectively.

As described above, in the manufacturing method of the present invention, since the center die 14 and the outer peripheral die 15 may be appropriately set in advance in accordance with the dimensions of the core material or the extruded building material for construction, the extruded material for construction with a desired cross-sectional shape Can be easily manufactured.

(Effects) As described above, the production method of the present invention comprises the step of pressing the molding material mainly composed of asbestos and cement, and the step of coating the molding material on the outer periphery of the core material substantially simultaneously with the step The composite structural member is manufactured with high productivity. Moreover, since the molding material itself is lightweight and the core material is made of a hollow material or the like to reduce the weight, the extruded structural material for construction is extremely lightweight, which is convenient for transportation and installation.

Further, since it has a structural strength equal to or higher than that of a reinforced concrete material having the same cross section, its use as a structural material is greatly expanded.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of an extrusion molding machine used in this manufacturing method, FIG. 2 is a cross-sectional view of an extrusion-molded material manufactured by this manufacturing method, and FIG. FIG. 1 ... Extruder, 2 ... Core material, 21 ... Core material one end, 22 ... Core material other end, 3 ... Molding material, 14 ... Center die, 15 ... Outer die, 16 ... Discharge Exit, 17 ... Supporting stand.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Saburo Haneda Nozawa, 15 Naniwa-cho, Chuo-ku, Kobe-shi, Hyogo (72) Inventor Nobuo Okuma 15 Naniwa-cho, Chuo-ku, Kobe, Hyogo (56) Reference JP-A-51-74013 (JP, A)

Claims (1)

[Claims] 1. A center die provided on the discharge side of an extruder,
One end of a hollow core material is applied with the outer surface of the central die and the outer peripheral surface of the core material being substantially flush with each other, and the other end is supported by a support base, and the central die and the outer peripheral die A building extrusion characterized in that a molding material is discharged to the outside from a discharge port formed by, the outer periphery of the core material is covered with the molding material, and the discharging is terminated when the other end is reached. Manufacturing method of molding material.