JPS62238705A - Manufacture of extrusion molding material for construction - 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] (Industrial usage Tn) The present invention relates to a method for producing extruded materials for construction.

(Prior art and its problems) Asbestos-cement materials, which are formed by kneading asbestos and hardened cement, are formed by papermaking or extrusion methods, and are often plate-shaped or tubular.

The strength of this asbestos-cement material is lower than that of concrete, and the only way to reinforce it is to insert small-diameter bars into the extruded, uncured asbestos-cement material.

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

(Means for Solving the Problems) The present invention was devised in view of the above problems, and especially in recent years, the compressive strength of asbestos cement material itself has become equal to or higher than that of concrete materials (for example, 600 g
/crn' Focusing on three points, one end of the core material is placed on the center die provided on the discharge side of the extrusion molding machine, and with the other end supported on a support stand, the molding material is discharged from the discharge port to form the core one by one. The present invention provides a manufacturing method for coating the outer periphery of a material.

According to this manufacturing method, it is possible to cover the outer periphery of the core material with the eyes of the molding material at the same time as the step of extruding the molding material. It is a composite structural member consisting of a molded material and a core material, and can exhibit a structural strength similar to that of so-called reinforced steel concrete, in which the compressive strength is provided by the molded material and the tensile strength is provided by the core material.

(Example) The method for producing an extruded material for construction according to the present invention will be described in detail below.

FIG. 1 is a schematic side sectional view of extrusion molded aluminum used in the invention.

This extrusion a1 consists of a cylinder 11 and a pressure plate 13 driven within the cylinder 11 by a ram 12. A center die 14 is located in the center of the discharge side passage of this cylinder 11.
Or installed.

The center die 14 has a shape necessary to hold one end of the core material to which it is applied, as will be described later. Further, since the extruded molding material is coated on the outer periphery of the core material, the cross-sectional shape is approximately the same as the cross-sectional shape of the core material. An outer peripheral die 15 is attached around the discharge side of the cylinder 11, and a discharge port 16 is formed by the above-mentioned center die 14 and this outer peripheral die 15. The discharge port lIJ is set to have a predetermined opening area depending on the thickness of the molding material covering the outer periphery of the core material.

On the other hand, a support stand 17 is arranged at a predetermined position and at approximately the same height as the center die 14.

Next, a manufacturing method using the above-mentioned extrusion molding Al will be explained.

First, one end 21 of the core material 2 is applied to the center die 14 and held there. Furthermore, the support stand 17 is brought into contact with the other end 22 and held. That is, the core material 2 is
It is assumed that the two are clamped together. Next, the molding material 3 is charged into the cylinder 11 via a hopper (not shown) or the like to a predetermined extent. The molding material 3 is a kneaded material mainly composed of asbestos and cement, and in order to improve the strength, part of the asbestos can be replaced with carbon fiber material or organic fiber material as necessary.

In order to discharge the 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 discharged from the discharge port 16.
It is extruded sequentially from

In such a state, the outer surface of the center die 14 and the outer circumferential surface of the core material 2 are substantially aligned and smooth, so that the discharge port 16
The molded material 3 extruded from the core material 2 advances while covering the outer peripheral surface of the core material 2. When it reaches the other end 22, the driving of the ram 12 stops.

In this state, after a predetermined period of time has elapsed, one end 21 and the other end 22 of the core material 2 are released from the center die 14 and the support base 17, respectively. Then, if necessary, heating and humidification curing treatment is further performed, and since the molding material 3 itself has adhesive force, it adheres to the outer circumferential surface of the core material 2 as it hardens, resulting in a state in which the entire core material 2 is covered.

Note that a rotating auger 1 is also used as a means for extruding the molding material 3.

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

As the core material 2, a mouth-shaped steel material is used as a single body, and the outer periphery of the core material 2 is coated with a molding material 3. In this extruded material A for construction, the core material 2 is hollow inside, so that weight reduction can be achieved. Moreover, the forming material 3 bears the compressive force, and the mouth-shaped steel material bears the tensile force, making it ideal for shaft materials such as pillar materials.

On the other hand, the extrusion molded material B for construction shown in FIG. 3 is constructed by installing a plurality of core materials 2.degree. A pipe steel material is used as this core material 2,
The outer periphery is covered with a molding material 3.

Since the adjacent steel pipes are integrally formed by the forming material 3, the pipe has a plate shape as a whole.

As in Section L, weight reduction is achieved by using a pipe steel material, and the compression forming material 3 becomes optimal for wall materials and floor slabs where the pipe steel material takes charge of tension, respectively.

In addition, in the second explanation, when carrying out this manufacturing method, it is also possible to use shaped steel materials such as H, L, and U, without necessarily limiting it to hollow materials. be. Alternatively, it may be an extruded aluminum material that has been subjected to corrosion-resistant treatment.

As described above, in the manufacturing method of the present invention, the center die 14 and the outer die 15 can be set appropriately in advance according to the dimensions of the core material and the extrusion molded material for construction, so that extrusion molding for construction with a desired cross-sectional shape can be performed. The material is easy to manufacture.

(Effects) As described above, the manufacturing method of the present invention consists of a step of pressing a molding material mainly made of asbestos and cement, and a step of coating the outer periphery of the core material with the molding material almost simultaneously. Composite structural members can be manufactured with high productivity. Moreover, if the molded material itself is lightweight and the weight is reduced by using a hollow core material, etc., the extruded molded material for construction can be extremely lightweight and transportable.
There is a lot of construction work involved.

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

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view of an extrusion molding machine used in this manufacturing method, Fig. 2 is a sectional view of an extrusion molded material manufactured by this manufacturing method, and Fig. 3 is a cross-sectional view of an extrusion molded material manufactured by the present manufacturing method. FIG. l...extrusion molding machine, 2...core material. 21... One end of the core material, 22... The other end of the core material. 3...Molding material, 14...Center tie. 15...Outer circumferential tie, 16...Discharge port, 17
...Support stand. Patent Applicant Kajima Corporation Agent Patent Attorney Norihiro Funa Hashikuni Figure 2 Figure 3

Claims (1)

[Claims] One end of the core material is applied to the center die provided on the discharge side of the extrusion molding machine, and the other end is supported on the support stand.
A method for producing an extruded molded material for construction, comprising discharging a molding material from a discharge port formed by a center die and an outer peripheral die, and covering the outer periphery of a core material with the molding material.