JPS59156706A - Manufacture of light thick cured body - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] □ [Technical Field] The present invention relates to a method for producing a lightweight, thick cured product mainly used for inorganic building materials such as wall materials.

[Background technique basket]

ALC (Auth
Oclaved Light Concrete) is widely used. This ALC has many excellent properties as a lightweight and thick construction material, such as 1) heat insulation, 2) noncombustibility and fire resistance, and 2) good dimensional stability. However, it also has drawbacks as described below.

That is, in terms of quality, since it is porous, it has a high water absorption rate and is inferior in durability. Although it is lightweight, its matrix density is low, making it weak and brittle.

In addition, in terms of production, a batch-type production method using casting molding is used, and a large amount of mixing water is required. If the amount of mixed water is large, various physical properties such as water absorption, strength, and durability will deteriorate.

For this reason, it is necessary to remove excess moisture by means such as autoclave curing or drying, which has disadvantages such as increased energy costs. In addition, the batch-type manufacturing method has the disadvantage that the mold cannot be removed until the molded product is cured, so a large number of molds are required, resulting in poor productivity.

[Purpose of the invention]

This invention was made in view of the above circumstances, and by mixing an inorganic binder and lightweight aggregate with less than one foot of mixing water, a bulk specific gravity of 1 with excellent strength and durability is obtained.
．． 0. To obtain a lightweight, thick cured product with a thickness of 20 tsm or more, and to release the molded product from the mold using a special gripping tool without damaging the molded product while it is not yet cured, it is possible to obtain a lightweight and thick product with good productivity. An object of the present invention is to provide a method for obtaining a cured product.

[Disclosure of the invention]

In order to achieve such an object, the invention provides a method for obtaining a lightweight, thick cured product, in which a hopper, a forming roll,
The inorganic molding material is continuously extruded using a molding device equipped with a molding die, and the molding material contains an inorganic binder as a main component, and the bulk specific gravity of the final molded product is 1.0 or less. Lightweight aggregate is added so that the amount of mixed water is 35 parts by weight or less per 100 parts of total solids, and the slump value is 0. The gist thereof is a method for producing a non-lightweight, thick cured body, which is characterized by gripping both side surfaces of the molded body while the molded body molded above is uncured and lifting the molded body to release the molded body from the receiving mold. . This will be explained in detail below.

The inorganic binder used in this invention refers to hydraulic substances in a broad sense, and cements in a narrow sense. In other words, hydraulic substances include cement and slag.

Gypsum 1 refers to lime, magnesium carbonate, etc.

Cement types include ordinary Portland cement, alumina cement, early strength cement, and jet cement.2. Refers to blast furnace cement, fly ash cement, etc. Furthermore, lightweight aggregates refer to general inorganic, organic, and lightweight aggregates. That is, the inorganic lightweight aggregate refers to ordinary foamed lightweight aggregates such as expanded shale, expanded clay, perlite, and shirasu balloon. Organic lightweight aggregate refers to organic resin foams and foam waste, such as styrene bead foams, phenol foams, urethane foams, and polyester foams.

In this invention, the above-mentioned inorganic binder and lightweight aggregate are mixed in a certain ratio, but the mixing ratio cannot be limited because it varies depending on the bulk specific gravity of the inorganic binder and lightweight aggregate used, but the final cured product is The mixing ratio is determined so that the bulk specific gravity is 1.0 or less.

That is, for example, the mixing ratio of ordinary Portland cement (volume-volume ratio type 1.5) and shale foam (volume specific gravity 0.5) is: cement/shale foam = 1/3 in volume ratio.
Reduce to about 1/4. Next, the above inorganic binder and lightweight aggregate are mixed in the presence of water, and the mixing ratio of the water is
The amount should be 35 parts by weight or less per 100 parts by weight of the total solid content of the inorganic binder, lightweight aggregate, etc. That is, the purpose is to mix with as little water as possible, so that the so-called slump value becomes zero. The amount of water is preferably 20 parts by weight or more. It is optional to add reinforcing fibers, fillers, and other additives to the mixture thus mixed, if necessary.

FIG. 1 is an explanatory diagram showing an embodiment of the manufacturing method according to the present invention. As shown in the figure, in the roll extrusion molding apparatus 1 used in this embodiment, a mold 3 is placed on an endless conveyor 2 and is moved in one direction (direction of arrow A). On the receiving mold 3, there is a hopper 5 containing the kneaded molding material 4, and an extrusion molding roll 6 having a smooth circumferential surface and rotating in the direction of arrow B.
and a molded diamond. A cutting device 10 having a cutting blade 9 for cutting the molded object 8ai on the receiving mold 3 into an appropriate size is provided behind the molding die, and further behind the cutting device 10, a molded object gripping device is provided. 11 are provided. The molded body gripping device 11 is configured to grip and lift the cut molded body 8b on the receiving mold 3 while the molded body 8b is not cured, and release the molded body from the receiving mold.

2 and 3 are longitudinal sectional views of main parts of the molded object gripping device 11 used in the manufacturing method according to the present invention.
The figure shows the state before gripping the molded object, and Figure 3 shows the state after gripping the molded object. As seen in these figures, the molded object gripping device 11 is configured to move up and down in the direction of arrow C. The molded body gripping device 11 includes a support frame 12 that spans the receiving mold 3 and the molded body 8b, and a support 13 for suspending the molded body gripping device 11 is provided on the upper surface of the central portion of the support frame 12. A pressing piece 15 for pressing the surface of the molded body 8b is attached to the lower part thereof via a support rod 14. Arm portions 16, 16' at both ends of the support frame 12 face the side surfaces of the receiving mold 3 and the molded body 8b. The arm parts 16, 16' have gripping pieces 19, 19' for gripping the side parts 18° 18' of the molded body 8b, and a telescopic member 17 such as an air cylinder.
, l7'. The molded body gripping device 11 is shown in FIG. 1, in which the molded body is gripped and released from the receiving mold 3 by moving a support 13 using a rail (not shown) or the like, and is prepared in a separate location. Palette 21
It can be stacked on top.

In this configuration, the kneaded molding material 4 is molded onto the receiving mold 3 by the action of the extrusion molding roll 6 and the molding diamond, moves continuously in the direction of the arrow, and is formed into a continuous molded body 8a. The molded body 8a is cut into a rectangular molded body 8b by a cutting device 9 to a required size, and the molded body gripping device 1
There is a pillar directly under 1. Here, after gripping the molded object, N11 is lowered and the pressing piece 15 provided at the center of the support frame 12 is pressed against the molded object 8.
Press the surface of b as shown in Figure 2. . Next, arm part 16
The gripping pieces 19, 19' are extended by the telescopic members 17, 17' provided at 16', and press and grip the side surface 1818' of the molded body 8b. In this state, when the molded body gripping device ll is raised, the molded body 8b is easily released from the receiving mold 3. The lifted molded bodies 8b are transferred as shown by the chain lines in FIG. 1, and are sequentially stacked on a separately prepared pallet 21. Thereafter, when the molded body 8b is subjected to moist heat curing as usual, a lightweight, thick cured body having a bulk specific gravity of 1.0 or less and a thickness of 20 mm or more is obtained.

In addition, in the manufacturing method of the present invention, tongue portions 21 and 21' can be formed on both side surfaces of the cured body 200 as shown in FIG. This can be achieved by providing uneven portions 23, 231 on the inner surface of both side surfaces of the molding die 22 as shown in FIG. That is, as shown in FIG. 5, the molding material 4 discharged from a hopper (not shown) is molded by a molding extrusion roll 6, and then passed through a molding die 22 having uneven portions 23 and 23' on both side surfaces. Here, the molded body is conveyed by the receiving mold 3 with unevenness (rabbits) automatically formed on both side surfaces.

By curing this, a lightweight, thick cured body 20 having tongues on both side surfaces as shown in FIG. 4 can be obtained.

〔Effect of the invention〕

In this invention, the main component is an inorganic binder as a molding material, a lightweight aggregate is added to this so that the bulk specific gravity of the final molded product is 1.0 or less, and the amount of water mixed is 10% of the total solid content.
Using a mold that has a slump value of 0 and a slump value of 35 parts by weight or less compared to 0 parts by weight, a hollow chisel, a molding roll, and a molding die are placed on a mold that moves continuously in one direction as a molding device. Obtain a molded body on the receiving mold using a machine equipped with
While the molded body is uncured, both sides of the molded body are pressed and held and lifted to release the molded body from the receiving mold, so even a lightweight and thick uncured molded body will not collapse. It can be easily released from the mold. For this reason, it is more reliable and efficient than a normal suction transfer method that sucks up the surface of the molded object and releases it from the mold. Moreover, the productivity is significantly higher than the ALC casting method in which the mold is removed after curing, and it is much more economical. Therefore, the lightweight thick cured product obtained by the manufacturing method according to the present invention has a bulk specific gravity of 1.
．． A lightweight, thick cured body having excellent strength, durability, etc. and having a thickness of 0 or less and a thickness of 2011r1n or more can be efficiently obtained with high productivity and at a low price.

Examples will be described in detail below.

〔Example〕

As a molding material, blast furnace upper layer) B type 20 capacity, perlite (volume weight 0.2) 10 capacity, expanded clay (LECA)
3-10m volume weight 0.3) 40 volume ratio 1 foamed clay (0-
3tm volume weight 0.55) 30 capacity chi was used.

Using the roll extrusion molding device shown in Figure 1, the molding speed was 15 m/
Molding was carried out under the following conditions: a surface pressure of 30 kg/m during molding, and a plate thickness of 75 mm. Using a molded body gripping device, both sides of the uncured and cut molded body molded on the receiving mold were placed under a surface pressure of 3
The molds were released by pressing at a pressure of kg/ffl and then stacked on a separately prepared pallet. During this operation, the uncured molded body was able to be released from the receiving mold without becoming completely heated. The molded bodies stacked on a pallet were left at room temperature for 4 hours, and then cured for 2 days under humid heat at 60°C to obtain a lightweight, thick cured body. The obtained cured product had a bulk specific gravity of 0.80 and was in good condition with no cracks or cracks.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the manufacturing method according to the present invention, Fig. 2 is a longitudinal cross-sectional view of the main part of the compact gripping device showing the state before gripping the compact, and Fig. 3 is after grasping the compact. Fig. 4 is a perspective view of a lightweight, thick cured material having tongue portions, and Fig. 5 is a longitudinal cross-sectional view of the main part of a molded object gripping device that shows the state of molding. Material 6... Extrusion roll 7゜22... Molding die 8a, 8b... Molded object 10... Cutting device 11... Molded object gripping device
15... Pressing piece 19, 19'... Gripping piece 21
, 21'... tongue part 23. 23'... Uneven part agent Patent attorney Matsumoto Takehiko Rei [Itorokutsu City Seisho (self-motivated) September 19, 1981 1, case display 58 evenings [Ushi o Kogorota 140 3 1 5
6 No. 6 No. 2, Name of the invention Process for producing lightweight thick hardened material 3, Relationship with the case of the person making the amendment Patent applicant Address 1048 Kadoma, Kadoma City, Osaka Name (583) Matsushita Electric Works Co., Ltd. Representative Representative shout-out Emperor: Iku Kobayashi 4, no agent

Claims (2)

[Claims] (1) A method for obtaining a lightweight, thick cured product, in which during molding, a hopper, a
The inorganic molding material is continuously extruded using a molding device equipped with a molding roll and a molding die, and the molding material contains an inorganic binder as a main component, and the final molded product has a bulk specific gravity of 1. Lightweight aggregate is added so that the total solid content is 0 or less, and the amount of mixed water is 35 parts by weight per 100 parts by weight of total solids.
By using a product that has a slump value of O and is adjusted to be less than the overlapped part, the molded product formed on the receiving mold is lifted by grasping both sides of the molded product while it is not yet cured. A method for producing a lightweight thick cured product, characterized by releasing the molded product from the mold. (2) The method for manufacturing a lightweight, thick cured product according to claim 1, wherein the molding die is provided with concave and convex portions on the inner surfaces of both side surfaces to create tongues on both side surfaces of the molded product. .