JPS59185613A - Method of molding pipe made of ceramics - 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 ceramic pipe, and more particularly, to a method for forming a ceramic pipe having a fine diameter through hole.

Conventionally, when molding a ceramic pipe, as shown in FIG. Generally, the base material (1) is extruded and formed between the extrusion molded product and the outer diameter of the eight rods 5) is the inner diameter of the through hole (1') formed inside the extruded product.

However, if the diameter of the through hole (1') is extremely fine, the diameter of the eight rods must also be extremely fine. The diameter of the 8-rod (5) must also be between 0.01 mm and several 11 mΦ, and not only can the 8-rod (5) be made extremely fine in this way, but also the diameter of the 8-rod (5) for the extrusion molding machine (A). The installation of the 8 rods (5) is difficult and frequent, and due to the discharge pressure and hardness of the substrate (1), the 8 rods 5) are worn out and deformed, and the 8 rods 5) are replaced in a short period of time. ．． However, there are defects that lead to a dramatic increase in manufacturing costs and the complexity of the manufacturing process.

The present invention has been made in view of the above-mentioned conventional circumstances, and its purpose is to eliminate the above-mentioned conventional drawbacks and to reduce manufacturing costs even when the diameter of the internal insertion hole is extremely small, for example, 0.01 mm' to several III1Φ. It is an object of the present invention to provide a method for easily and simply forming a ceramic pipe without causing a rise in the price or complication of the manufacturing process.

The basic method for achieving this purpose is to suspend the core wire from the nozzle of an extrusion molding machine so that it can be fed out, and then extrude it from the nozzle at the same time as the extruded base material, burying the core wire within the base material, and then forming the extrusion molding. By pulling out the core wire from the product and firing it, micropores are created in the core.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The extrusion molding machine (A) has a form and structure well known in this technical field, and has a 10-karat gold (
From the nozzle (b,) of a), the ceramic extrusion base (1
) For example, as a plasticizer in ceramic powder such as alumina -C
A material containing clay, an organic binder, and water or a solvent is discharged under pressure.
Attach a core (C) inside the cap (a) so that one or more core wires (2) are fed out together with 1) and buried in the substrate, and insert the tip of this core (C) into the nozzle. (b) and insert the core wire (2) into the core metal (C) through the nozzle (b).
) so that it can be extended.

The core metal (C) has a through hole (6) for the core wire (2) inside, and the core metal (C) is suspended or otherwise inserted into the mouthpiece of the molding machine (A) so that the tip thereof is close to the nozzle (b). The core wire (2) is suspended in the nozzle (b) by fixing it by any means.

The core wire (2) has an extremely fine diameter, for example, 0.01 mm, and has an outer diameter corresponding to the diameter of the through hole (1') that connects the pipe.
~ several lΦ, for example, made of nylon fishing line, tungsten thin wire, etc., and this core wire (2) is
Nozzle (b) inserted into the inside of C) and ready to be fed out.
When the extruded material (1) is discharged, it is inserted into the material (1) which is fed out together with the extruded material (1). This feeding is carried out by the action of tensile force and the like when the extruded material is discharged, but the top surface of the extrusion molding machine (A) and the mouth (a)
It may be wound around a roll (3) or the like provided at a desired location such as in front of the extruded material and fed out by a separate feeding device or the like in response to the discharging of the extruded material, or as mentioned above, it may be fed out sequentially when a tensile force is applied during discharging. It is also a good idea to In addition, this core wire (2) depends on the type of pipe to be formed,
That is, it is possible to suspend the necessary water corresponding to the number of through holes (1').

The base material (1) extruded from the nozzle (b) is extruded into a molded product (4) with the core wire (2) embedded therein due to its discharge pressure and viscosity. After cutting and drying, the core wire is drawn out and fired in an oxidizing or inert atmosphere to obtain a ceramic pipe (B) having a fine diameter through hole (1'') inside.

The ceramic pipe (B) molded by the molding method of the present invention can be used as a ceramic capillary for a pen tip or the like.

As described above, the present invention involves the steps of discharging the core wire from a nozzle together with the extruded base material, embedding the core wire in the base material and extruding it, pulling out the buried core wire, and molding the molded product in an oxidizing or inert atmosphere. Since the firing process is carried out sequentially, a ceramic pipe having a fine-diameter through-hole inside can be easily and easily formed using a core wire. Therefore, it is not necessary to manufacture 8 rods in an extrusion molding machine, which is almost impossible with conventional methods, and the difficulty and complexity of installation is eliminated.By sequentially feeding out the core wire, there is no need to replace 8 rods. Molded products can be easily and accurately made.

Therefore, the desired purpose can be achieved.

[Brief explanation of drawings]

The drawings show an example of the method for forming a ceramic pipe according to the present invention, in which Fig. 1 is an enlarged sectional view of the main part, Fig. 2 is an enlarged sectional view of the extruded product before the core wire is used, and Fig. 3 is an enlarged cross-sectional view of the fired ceramic pipe, and Figure 4 is (
FIG. 5 is a partially enlarged sectional view of an extrusion molding machine in a conventional molding method. In the figure, (A): Extrusion molding machine (a): Nozzle (2): Core wire (1): Extrusion base Patent Office Commissioner Waka
Mr. Kazuo Sugi (Patent Office Examiner) 1. Indication of the case Patent Application No. 61904 of 1982 (2, title of invention: Ceramics), method for molding a vibrator, 3. Relationship with the amended person's case Patent application Person's name (Name) (AO8) Toto Kiki Co., Ltd. 4, Agent 5, Voluntary amendment with an order for amendment) Showa year, Month, Day 6, Detailed explanation of the invention column 7 of the specification subject to amendment, Amendment Content

Claims (1)

[Claims] The core wire is suspended from the nozzle of an extrusion molding machine so that it can be fed out, and the core wire is discharged into the nozzle at the same time as the extrusion base material, and the core wire is embedded in the base material and extrusion molded.After that, the core wire is pulled out from the molded product. A method for forming a ceramic pipe characterized by firing.