JPS5845008A - Manufacture of inorganic 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] The present invention relates to a method for manufacturing an inorganic molded body. .

Injection molding of mechanical polymers allows for the easy molding of objects with complex shapes, so studies have been conducted to apply this to the molding of inorganic materials, but no success has been achieved so far. In some cases, inorganic powder is mixed with several 1% thermosetting resin, injection molded, and then fired to burn out the thermosetting resin and at the same time sinter the inorganic powder to produce a ceramic base. There are some ways to do this.

The present invention was devised for the purpose of injection molding inorganic articles, and a curable composition of hydraulic cement-clay-water system is injected into a mold from an injection molding machine, and the molding space inside the mold is The purpose is to obtain an inorganic molded article by curing and curing this composition that has been photoseeded inside, and has the advantage that a molded article with a structure and appearance similar to that of a ceramic base can be easily produced in an open weaving manner. First, we will explain the hydraulic cement-clay-water compositions used as molding materials: commercially available ordinary Portland cement, early-strength Portland cement, medium-heat Portland cement, white Portland cement, blast furnace cement, fly ash cement, silica cement, and color. Hydraulic cement such as cement or alumina cement is added alone or in combination, and a sufficient amount of plastic clay or clay mineral such as Georgian kaolin is added to the composition to impart FiJ plasticity, and water is added to the composition. It is added to a range sufficient to make it plastic and harden sufficiently.

Usually, about 20 to 50 percent of clay is mixed with hydraulic cement S- (@quantity ratio). Addition/111 It is thought that it is better to keep the amount of water to a minimum in order to prevent shrinkage during molding as much as possible, and if desired, use a cement water reducing agent that has a clay dissolving effect.

In addition, in order to make the properties of the molded product rare, the composition contains silica, limestone, blast furnace slag, silica, calcium, aluminum hydroxide, alumina, zircon, zirconia, cordialite, Iwagumi I, glass A-cone. Others may be added as necessary, such as sodium chloride, silica, methyl cellulose, etc., if desired.
17 fat emulsion, paraffin emulsion, calcium stearate, water-soluble silico-water cutting, etc. may be added. Hydraulic cement-clay-water system compositions have a yield Q'+, especially for large molded products. In order to compensate for this shrinkage, it is recommended to add an appropriate cement expansion agent.
It may also be a good idea to pre-fire some clays.

Injection molding machines do not need to heat the molding material, so they only need to inject and force-feed the molding material toward the mold.
The conventional screw set or piston-type α-Korushiren or Kiyabo-Kura demolition machine for extrusion molding of clay or cement can be used instead of 1] gold for injection molding.

Since the hydraulic cement-clay-water composition does not harden instantly, a large number of molds are required for industrial production. A large number of molds are successively installed on a conveyor, conveyed one after another and attached to the mouthpiece of an injection molding machine, and a hydraulic cement-viscous water-based molding material is delivered from the injection molding machine into the space of the mold. It is possible to set up a factory that sequentially injects the

Plastic or rubber is suitable as the mold material, but a wooden mold or metal mold filled with a mold release IWII such as mold release ball 1 may also be used. The surface of the molded body molded using a highly smooth plastic mold has a mirror finish, and the molded body resembles a polishing stone.

Normally, after injection molding, the mold is removed from the mold about 1 day after injection molding, and the product is left to dry for about 2 months to 2 months. Through this normal curing or steam curing, etc., a high strength comparable to that of a 6Ft pottery base is developed.

When demolded after about 7 days of age, the molded product has low strength, so the mold is either a split mold, that is, the mold is divided to make it easier to demold, or a soft mold is used. It is necessary to bend the mold and make it easy to demold. If it is still difficult to remove the mold, the mold can be removed later using a waste material such as electricity-generating polystyrene, and by using such a waste material, it is possible to produce hollow molded bodies. . Release 5! Removal of waste W such as styrene and styrene is done by shaving by heating.

Hydraulic cement obtained by injection II3 molding of the present invention
Clay-based products can be left as they are (similar to ceramic material 11!1), but are preferably treated with an oil-based silicone agitated water agent (class 1 waterproofing agent). Also, if the surface is coated with inorganic paint, epoxy resin paint, or metallic paint. It is possible to change the external appearance by applying metallization), and in some cases, the entire molded product may be subjected to rough-in content or impregnation with a synthetic tree layer.

Inorganic molded bodies that can be manufactured according to the present invention include, for example, garden furniture, toilet bowls, wash basins, sink top boards, bath unit building materials, relief ties, blocks, ornaments, flower stands, dolls, umbrella stands, and arcs. Possible uses include cycoat, heat-resistant materials, electrical insulation materials, etc.

The manufacturing method of the present invention is illustrated in the attached Figure 1, in which the reference numeral / indicates the injection molding machine, 2 indicates the screw, 3 indicates the molding material input port, and G indicates the mouthpiece. Hail. Reference numeral 10 indicates a mold, and // indicates a molding space (injection space) provided therein. A hydraulic cement-clay-water-based plastic hardening composition (not shown) introduced from the molding material input port 3 of the injection molding fi/ is injected from the mouthpiece t by rotation of the screw λ of the injection molding machine, and then The molding space (injection space) in the mold lO connected to the mouthpiece q of the molding machine is filled with the molding process. After injection, the screw of the injection molding machine is turned 11, the mold IO is removed from the injection molding machine, and the composition described in @ is cured by curing, so it is removed from the mold after curing.

Hereinafter, the present invention relates to a method for producing an inorganic molded article, which is characterized by injection molding a hydraulic cement-clay-water composition, and enables the easy production of inorganic molded articles such as ceramic pieces. It dictates the possible benefits.

[Brief explanation of drawings]

FIG. 1 is a sectional view for explaining 7.1 the method for manufacturing an inorganic molded body according to the present invention. (Explanation of the symbols in the figure) ／・・・・・・・・・・・・Injection molding machine 2・・・・・・・・・・・・Screw 3・・・・・・・・・・Injecting molding material 1”ψ・・・・・・
......1] Gold 10...Molding mold//...Molding space (injection space) Patent applicant: Hl Haru Satoru Yoi 1 seagull

Claims (1)

[Claims] 1. A method for producing a one-piece molded body, characterized by injection molding a hydraulic cement-clay-water composition.