JP2590318Y2 - spoon - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spoon, and more particularly to a spoon made of a ceramic member.

[0002]

2. Description of the Related Art A spoon used simultaneously with a coffee cup or the like is generally formed of a metal material such as stainless steel.

In recent years, it has been proposed to form a spoon with a ceramic member in order to prevent the elution of metal components to improve the taste and to improve the palatability (for example, Japanese Patent Publication No. Sho 61-7086). Gazette).

When the spoon is formed of a ceramic member, a slurry of ceramic raw material is prepared, and the slurry is formed into a spoon shape by, for example, a casting method or an injection molding method, and the formed body is fired at a desired temperature. It is possible. In other words, in the casting method, a ceramic slurry is prepared by adding an aqueous binder or the like to a ceramic raw material powder, and the slurry is poured into a plaster mold, and formed into a spoon shape by using the inking of the mold and water absorption. It is to be molded. Also,
Injection molding is a method in which a ceramic raw material powder and an organic binder are kneaded at a high temperature to impart fluidity to a plastic state, and then molded into a spoon shape by pressure injection into a metallic mold. It is. In each of the casting method and the injection molding method, an injection port for the slurry is provided in the grip portion of the mold of the spoon, and the slurry is injected so as to gradually fill the tip of the dish portion of the spoon. Thereafter, in the casting method, a formed body is dried for a predetermined time to obtain a formed body, and the formed body is degreased and fired at a predetermined temperature to sinter the ceramic raw material and perform a desired polishing to form a spoon. You.

[0005]

However, when the spoon is formed by the casting method, when the spoon plate is formed to be thin, the mud often does not fill up to the tip of the spoon plate. There is a problem that the production yield is extremely poor.

Further, when the spoon is formed by injection molding, if the plate portion of the spoon is formed to be thin, the slurry is cooled by the mold and solidified when the slurry is poured into the mold. There is a problem that a dish having a thin wall cannot be formed. Also, if the injection pressure of the slurry is increased, the slurry can be injected up to the tip of the dish. There was a problem that deformation and cracks sometimes occurred.

[0007]

SUMMARY OF THE INVENTION The spoon according to the present invention has been made in view of such problems of the prior art, and is characterized in that a dish is provided at the tip of the grip. In the formed spoon, the grip portion and the dish portion were formed of a ceramic member, and the tip of the dish portion was made thinner than the grip portion side, or a thick portion was formed at the boundary between the grip portion and the dish portion. On the point.

[0008]

Since the cross-sectional area near the boundary between the grip portion and the plate portion of the spoon is increased by the above configuration, the spoon is formed by a casting method or an injection molding method using a ceramic slurry. In this case, the flow path of the mud at the boundary between the grip of the spoon and the plate becomes large, and the mud can be filled up to the tip of the mold of the plate of the spoon,
The spoon plate can be made thinner. In addition, when formed by an injection molding method, the injection pressure can be reduced, and even if the slurry is injected into a mold at a high injection pressure, it can be filled with a uniform density, and the spoon produced shape is distorted. No cracks or the like occur during firing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a view showing one embodiment of a spoon according to the present invention, wherein 1 is a spoon, 2
Denotes a grip portion of the spoon, and 3 denotes a dish portion of the spoon. The spoon 1 includes a grip portion 2 and a plate portion 3, and the grip portion 2 and the plate portion 3 are integrally formed. The thickness of the dish portion 3 is set as follows: tip 3a <center 3b <grip 3c. In the spoon of the present invention, for example, the thickness of the dish 3 is such that the tip 3a has a thickness of about 1 mm or more,
Is set to about 1.5 mm or more, and the thickness of the grip portion side 3c is set to about 2 mm or more. That is, it is desirable to form the plate portion 3 as thick as possible in terms of strength, but it is desirable to form the plate portion 3 as thin as possible in terms of appearance and usability.

FIGS. 2 (a) and 2 (b) are views showing an embodiment of a spoon according to the present invention.
Is a view from the side, and (b) is a view from the bottom. Also in this invention, the spoon 1 is constituted by the grip portion 2 and the plate portion 3, and the thick portion 4 is formed on the back surface of the boundary between the grip portion 2 and the plate portion 3. This thick part 4 has a good appearance and strength.
Although it is desirable to provide on the back side of the grip portion 2 and the dish portion 3 for molding, it may be provided on the front side, the front side and the back side, or the side surface side of the grip portion 2 and the dish portion 3.

The grip 2 and the dish 3 are integrally formed of a ceramic member. As a ceramic member forming such a spoon, a small amount of a sintering aid such as zirconia (ZrO ₂ ) -based sintered body or magnesia (MgO) containing a small amount of a stabilizer such as yttria (Y ₂ O ₃ ) is used. Containing alumina (Al ₂ O ₃ ) sintered body, silicon carbide (Si
C) sintered body, or silicon nitride (Si ₃ N ₄ ) based sintered body. In particular, the zirconia sintered body is preferable because the bending strength thereof is 10,000 to 20,000 kg / cm ^2, which is much larger than the other sintered bodies of 1,800 to 7,500 kg / cm ² . In the case of forming a zirconia sintered body, it is desirable to use a raw material in which a stabilizer and zirconia are coprecipitated.

[0012] Such a spoon is formed by forming a formed body by a casting method, an injection molding method, a pressure molding method, or the like, and firing at a desired temperature. When formed by a casting method, a desired amount of water, a binder such as an acrylic resin, a dispersant such as an ester resin, and a surfactant is added to the raw material powder, and the mixture is poured into a gypsum mold and solidified. Forming features. In this case, about 30 parts of water, about 2 parts of a binder, about 1 part of a dispersant, and about 0.2 part of a surfactant are added to 100 parts of the raw material to form a slurry, which is poured into a gypsum mold. I let the mold absorb water,
Solid casting. In the spoon of the present invention, the grip portion side 3c of the plate portion 3 is formed thicker than the tip portion 3a side, or the thick portion 4 is formed at the boundary between the grip portion 2 and the plate portion 3, The mud spreads to the tip 3a of the dish 3,
Since the vicinity of the boundary between the grip portion 2 and the dish portion 3 is formed thick, the strength of the formed body is also increased.

When formed by injection molding, a plasticizer such as polyethylene glycol or oil, a surfactant,
A desired amount of a lubricant such as an ester-based resin, a gelling agent such as a hydroxy fatty acid, and a crystallization inhibitor such as a hydrocarbon compound is added, followed by molding. In this case, about 4 to 7 parts of a plasticizer, about 0.1 to 3 parts of a surfactant, about 5 to 8 parts of a lubricant, about 0.5 to 3 parts of a gelling agent, about 0.5 to 3 parts of a crystallization inhibitor, based on 100 parts of the raw material. About 0.01 to 1 part is added to form a slurry, which is injected into a cooled mold at a low injection pressure of about ² to 5 kg / cm ² for molding. With the spoon of the present invention,
Since the grip portion side 3c of the plate portion 3 is formed thicker than the tip portion 3a side, or the thick portion 4 is formed at the boundary portion between the grip portion 2 and the plate portion 3, mud matter even at a small injection pressure. Can be poured to the tip 3a of the dish portion 3, so that the density of the slurry in the mold becomes uniform, and the molded body can be fired without causing distortion or the like when firing.

Also, about 5 to 9 parts of a binder such as an acrylic resin, about 3 to 7 parts of a plasticizer such as polyethylene glycol, and 3 to 7 parts of a lubricant such as stearic acid are added to the raw material powder.
About 1 part / cm ² may be injected into a mold that has been cooled at a high injection pressure of about 1 ton / cm ² . In the spoon of the present invention, the grip portion side 3c of the plate portion 3 is formed to be thicker than the tip portion 3a side, or the thick portion 4 is formed at the boundary between the grip portion 2 and the plate portion 3, Even if the injection is performed at a high injection pressure, the packing density of the slurry in the mold becomes uniform, and the formed product can be fired without generating distortion or the like and without generating cracks or the like during firing.

When a zirconia sintered body or an alumina sintered body is manufactured, it is fired at a temperature of 1400 to 1600 ° C., and when a silicon carbide sintered body or a silicon nitride sintered body is manufactured, 1800 to 2200 ° C. At a temperature of

[0016]

As described above, according to the spoon according to the present invention, the grip portion and the plate portion are formed of a ceramic member, and the tip portion of the plate portion is made thinner than the grip portion side, and the grip portion and the dish portion are made thinner. Since the thick part is formed at the boundary of the dish, the cross-sectional area near the boundary between the grip of the spoon and the dish becomes large,
When the spoon is formed by casting or injection molding using ceramic mud, the flow path of the mud at the boundary between the grip of the spoon and the plate becomes large and extends to the tip of the plate of the spoon. It can be filled with mud and the dish of the spoon can be thinned. In addition, when formed by an injection molding method, the injection pressure can be reduced, and even if the slurry is injected into a mold at a high injection pressure, it can be filled with a uniform density, and the spoon produced shape is distorted. No cracks or the like occur during firing.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a spoon according to the invention described in claim 1;

FIG. 2 is a view showing one embodiment of a spoon according to the invention described in claim 2, (a) is a view from the side, (b)
Is a view from the bottom.

[Explanation of symbols]

1 ... spoon, 2 ... grip, 3 ... plate, 4
... Thick parts

Claims (2)

(57) [Scope of request for utility model registration] 1. A spoon in which a dish portion is formed at the tip of a grip portion, wherein the grip portion and the dish portion are formed of a ceramic member, and the tip portion of the dish portion is made thinner than the grip portion side. And a spoon. 2. A spoon having a dish portion formed at the tip of the grip portion, wherein a thick portion is formed at a boundary between the grip portion and the dish portion.