JPH06279013A - Production of dry ice and apparatus for forming dry ice - Google Patents

Abstract

PURPOSE:To provide a method and apparatus for the automatic continuous production of a necessary number of dry ice balls having uniform size. CONSTITUTION:A press-receiving face 5 and a pressing face 6 movable by a press piston 3 are placed opposite to each other. Each face has a form concave to the opposite face. The pressing face 6 is brought closer to the press- receiving face 5 and snowy dry ice 2 is compressed between the curved pressing faces 5, 6 while exhausting excess gas 8 from exhaustion parts 7 of the faces 5, 6 to obtain a solid dry ice block 4 having spherical or nearly spherical form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry ice manufacturing method and a dry ice molding apparatus capable of continuously molding small solid dry ice in the shape of a sphere or a lump close to a sphere.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
Due to the efficiency of the compressor, dry ice is shaped into a cushion.
Therefore, this cushion-sized dry ice is cut into brick-sized pieces for sale, and when the user (purchaser) desires small dry ice due to the intended use, this brick-sized dry ice is used. Ice must be crushed and cut with ice picks one by one before use.

In this case, cutting and crushing are troublesome only with dry ice, and there is also a drawback that excessively crushing produces waste, and the appearance is bad.

The present invention focuses on the increasing demand for small dry ice in various fields such as cake shops, ice cream shops, university laboratories, laboratories, hospitals, and refrigerated home delivery. It is a technical problem to provide a dry ice manufacturing method and a manufacturing apparatus capable of automatically and continuously molding a ball-shaped dry ice of a certain size on the spot without the trouble of going to the dry ice molding shop. is there.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

Liquid carbon dioxide is jetted into the dry ice forming chamber 1 to generate snow-like dry ice 2, and the snow-like dry ice 2 is compressed by a press piston 3 inserted into the dry ice forming chamber 1. The solid dry ice 4 is molded, and the compression receiving surface 5 on one side facing each other and the compression surface 6 movable by the press piston 3 on the other side are curved compression surfaces 5 concavely curved toward the inside. 6, the compression receiving surface 5 is brought closer to the compression receiving surface 5, and the curved compression surface 5
While compressing the snow-like dry ice 2 while exhausting an excess gas 8 from the exhaust portion 7 provided on the curved compression surfaces 5 and 6 between 6,
The present invention relates to a method for producing dry ice, which comprises forming a solid dry ice 4 in the shape of a sphere or a sphere close to a sphere.

A compression receiving surface 5 is provided on one side of the dry ice forming cylinder 9.
A press piston device capable of moving at least the compression receiving surface 5 or the compression surface 6 by forming the dry ice forming chamber 1 by arranging the compression receiving surface 5 and the compression surface 6 facing the compression receiving surface 5.
10 is provided so that the compression surface 6 can be separated from the compression receiving surface 5, and the spray hole 11 for spraying liquid carbon dioxide into the dry ice forming chamber 1 to generate the snow-like dry ice 2 is dry ice. Curved compression surfaces 5 and 6 provided in the molding chamber 1 in which the opposing compression receiving surface 5 and compression surface 6 are concavely curved inwardly facing each other.
When the snow-like dry ice 2 is compressed between the curved compression surfaces 5 and 6 by bringing the compression surface 6 close to the compression receiving surface 5, the extra gas 8 is exhausted to be spherical or nearly spherical. The present invention relates to an apparatus for producing dry ice, characterized in that it is provided on the curved compression surfaces 5 and 6 of the exhaust unit 7 capable of forming the solid dry ice 4 in a lump form.

[0008]

The function of claim 1 will be described.

A curved compression surface 5 in which the snow-like dry ice 2 generated in the dry ice forming chamber 1 is concavely curved inwardly facing each other.
• Compress at 6 to form spherical or near spherical solid dry ice 4.

As described above, since the rice ball is pressed and solidified by the wrapping compression method between the curved compression surfaces 5 and 6, the solid dry ice 4 having a high hardness which does not lose its shape without requiring a strong compression force is formed. The Rukoto.

In this respect, since the solid dry ice in the form of a flat plate has been used in the past, an extremely strong compression force is required to obtain a hardness that does not cause the mold to collapse, which results in a large-sized compression molding machine, which is efficient. It formed large dry ice. In addition, the hugging compression method of pressing between the curved compression surfaces 5 and 6 as a result of carrying out the operation causes an excessive gas 8 to be hugged when the snow-like dry ice 2 is compressed, and good compression molding cannot be performed. In addition, a problem "sucker phenomenon" may occur in which the solid dry ice 4 after compression is difficult to be adsorbed on the curved compression surfaces 5 and 6 and is difficult to be released.

In this respect, according to the present invention, the curved compression surface 5 is used for compression.
The excessive gas 8 is compressed while being exhausted from the exhaust portion 7 provided in 6, and the exhaust portion 7 serves as a vent hole at the time of demolding to prevent the sucker phenomenon. The hugging compression is realized.

The second aspect of the present invention has the same effect as that of the first aspect, and therefore will be omitted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the invention according to claim 2 which can be an embodiment of the invention according to claim 1 will be described.

First, the configuration of this embodiment will be described.

On one side of the cylindrical type dry ice molding cylinder 9, a porous molding cylinder 13 formed of a porous material having air permeability such as a sintered body is connected. Press piston devices 10 and 11 are arranged on both left and right sides of the molding cylinders 9 and 13, respectively, and at the tip of the press piston 3 protruding from the air cylinder of the press piston device 10 on the side of the porous molding cylinder 13 (left side in the drawing). The compression surface 6 is formed.

On the other hand, the compression receiving surface 5 is formed at the tip of the press piston 15 protruding from the air cylinder of the press piston device 11 on the opposite side. The compression receiving surface 5 and the compression receiving surface 6
Are formed on the curved compression surfaces 5 and 6 that are concavely curved inwardly facing each other.

A mounting hole 16 is formed in the compression receiving surface 5 (curved compression surface 5) and the compression surface 6 (curved compression surface 6), and a porous exhaust member 17 formed of a porous material in the mounting hole 16 is formed. And a vent passage 18 is formed in the press pistons 3 and 15 so as to communicate with a large number of vent holes of the porous exhaust member 17, the vent passage 18 is communicated with the outside, and the exhaust portion 7 is provided. ing.

Next, the operation of this embodiment and the method for producing dry ice of this embodiment will be described with reference to FIG.

As shown in FIG. 1 (A), a carbon dioxide injection valve
19 is opened, and compressed liquid carbon dioxide is ejected into the dry ice forming chamber 1 through the ejection hole 12. The air in the dry ice molding chamber 1 is exhausted from the ventilation hole of the porous molding cylinder 13 of the outer cylinder portion of the dry ice molding chamber 1 and the exhaust portion 7, and the replacement with the compressed liquid carbon dioxide is easily performed.

Since this compressed liquid carbon dioxide is rapidly returned to atmospheric pressure, it is cooled and becomes snow-like dry ice 2 in the dry ice forming chamber 1.

After the compressed liquid carbon dioxide is ejected, the press piston devices 10 and 11 are operated, the press piston 3 of the press piston device 10 projects from the air cylinder, and is fixedly held by the projecting force of the press piston 15 of the press piston device 11. The compression surface 6 is pushed toward the compression receiving surface 5.

That is, as shown in FIG. 1B, the snow-like dry ice 2 is pressed and solidified by the compression receiving surface 5 and the compression surface 6 in the dry ice forming chamber 1. Since both the compression receiving surface 5 and the compression surface 6 are formed as curved compression surfaces 5 and 6 that are concavely curved inwardly facing each other, they are very strong and glossy and hard due to the hugging compression action that grips and solidifies a rice ball. Solid dry ice 4
Is molded into.

At this time, since the excess gas 8 is exhausted to the outside through the exhaust portion 7 provided on the compression receiving surfaces 5 and 6, the hardness is realized by the hugging compression.

As shown in FIG. 1 (B), after this holding compression is held for several seconds, the press piston device 11 is retracted to retract the compression receiving surface 5 as shown in FIG. 1 (C). Further, as shown in FIG. 1 (D), the press piston device 10 is operated to advance the compression surface 5 and push out the block-shaped solid dry ice 4 having two spherical opposite surfaces from the inside of the dry ice forming chamber 1. . The pushed solid dry ice 4 drops into a predetermined storage tray 20.

Since the exhaust portion 7 is formed on the curved compression surfaces 5 and 6 and is in a ventilated state with the outside, the solid dry ice 4 and the curved compression surfaces 5 and 6 are attracted to each other by a so-called sucker phenomenon or ice. It is also prevented that it becomes difficult to release due to sticking and adsorption.

Further, even if the curved compression surface 5 is not adsorbed and does not fall, the forced drop device 21 always pushes down the solid dry ice 4 when adsorbed at a predetermined timing. Further, in this embodiment, as shown in FIGS. 2 and 3, two dry ice producing sections 22 configured and operated as described above are provided in parallel.

Since it takes several tens of seconds to complete one manufacturing process as described above, the two dry ice manufacturing units 22
・ Allow 22 to operate alternately to improve manufacturing efficiency,
Each valve that stops the injection of liquid carbon dioxide into each forged part 22
The control unit 23 controls the opening / closing control of the valves 19/19 and the valve opening / closing control for stopping the injection of air into the press piston devices 10/11, and as shown in FIG. 3, one carbon dioxide cylinder 24 and one air compressor 25. By alternately using and without waste, the operating efficiency is improved and this device is designed compactly.

In the figure, reference numeral 26 is an opening / closing door for taking out the molded solid dry ice 4, and 14 is an operating portion.

Further, in the present embodiment, the dry ice production unit 22
Porous molding cylinder 13 using a porous material that constitutes the
Other than the compression receiving surface 5 (curved compression surface 5) / compression surface 6 (curved compression surface 6), the press piston 3, the press piston 15, etc. are made of brass (copper alloy). Since brass has excellent thermal conductivity, when the operation of the present apparatus is started, the entire dry ice forming chamber 1 is cooled to a predetermined temperature by the jetted compressed liquid carbon dioxide in a single hour. If it is not cooled to this predetermined temperature, the amount of snow-like dry ice 2 produced will be insufficient, and the solid dry ice 4 smaller than the desired shape will be formed several times at the start of operation. That is, when the compressed liquid carbon dioxide is ejected, the compressed liquid carbon dioxide is quickly cooled to a predetermined temperature so that the "startup time" of the apparatus can be shortened. On the contrary, since brass has good thermal conductivity, when the solid dry ice 4 after molding is released from the mold, immediately the compression receiving surface 5 (curved compression surface 5) and the compression surface 6 are pressed.
The temperature of the (curved compression surface 6) rises toward room temperature, the compression receiving surface 5 (curved compression surface 5) and the compression surface 6 (curved compression surface 6) become iced, and the solid dry ice 4 becomes difficult to release. I am trying to prevent it.

[0031]

Since the present invention is constructed as described above, it compresses by embracing it between the curved compression surfaces which are concavely curved inwardly facing each other, so that it is extremely strong (hard) and solid dry ice is not affected by a large compression force. The dry ice can be compacted into a spherical shape or a lump close to a spherical shape, and it is possible to continuously mold as many solid dry ice pieces with a predetermined shape as is desired. A dry ice manufacturing method and a dry ice forming apparatus are provided.

Further, even in the hugging compression molding using the curved compression surface, since the exhaust portion is provided on the curved compression surface, the extra gas hugged during the compression is exhausted and the compression can be performed extremely well. It becomes easy to release the mold, and the hugging compression that exhibits the above-mentioned effect can be realized.

[Brief description of drawings]

FIG. 1 is an explanatory side cross-sectional view of a main part showing a molding process of this example.

FIG. 2 is an explanatory plan sectional view of a main part of the present embodiment.

FIG. 3 is a schematic configuration perspective view showing a usage state of the present embodiment.

[Explanation of symbols]

 1 Dry Ice Molding Room 2 Snowy Dry Ice 3 Press Piston 4 Solid Dry Ice 5 Compression Plane (Curved Compression Surface) 6 Compression Plane (Curved Compression Surface) 7 Exhaust Section 8 Extra Gas 9 Dry Ice Molding Tube 10 Press Piston Device 12 Spout hole

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[Procedure amendment]

[Submission date] February 23, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

A compression receiving surface 5 is provided on one side of the dry ice forming cylinder 9.
And a compression surface 6 facing the compression receiving surface 5 to form a dry ice molding chamber 1, and at least the compression receiving surface 5 or the compression surface 6 can move.
10 is provided so that the compression surface 6 can be separated from the compression receiving surface 5, and the spray hole 12 for spraying liquid carbon dioxide into the dry ice forming chamber 1 to generate the snow-like dry ice 2 is dry ice. Curved compression surfaces 5 and 6 provided in the molding chamber 1 in which the opposing compression receiving surface 5 and compression surface 6 are concavely curved inwardly facing each other.
When the snow-like dry ice 2 is compressed between the curved compression surfaces 5 and 6 by bringing the compression surface 6 close to the compression receiving surface 5, the extra gas 8 is exhausted to be spherical or nearly spherical. The present invention relates to a dry ice manufacturing apparatus, characterized in that an exhaust portion 7 capable of forming a lump of solid dry ice 4 is provided on the curved compression surfaces 5 and 6.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

At this time, since the excess gas 8 is discharged to the outside through the exhaust portion 7 provided on the compression receiving surface 5 and the compression surface 6 (curved compression surfaces 5 and 6), the hardness due to the hugging compression Is realized.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

As shown in FIG. 1 (B), after this holding compression is held for several seconds, the press piston device 11 is retracted to retract the compression receiving surface 5 as shown in FIG. 1 (C). Further, as shown in FIG. 1 (D), the press piston device 10 is operated to move the compression surface 6 forward, and the block-shaped solid dry ice 4 having two spherical opposite surfaces is pushed out from the inside of the dry ice forming chamber 1. . The pushed solid dry ice 4 drops into a predetermined storage tray 20.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

Since it takes several tens of seconds to complete one manufacturing process as described above, the two dry ice manufacturing units 22
・ Allow 22 to operate alternately to improve manufacturing efficiency,
Each valve that stops the injection of liquid carbon dioxide into each manufacturing department 22
The control unit 23 controls the opening / closing control of the valves 19/19 and the valve opening / closing control for stopping the injection of air into the press piston devices 10/11, and as shown in FIG. 3, one carbon dioxide cylinder 24 and one air compressor 25. By alternately using and without waste, the operating efficiency is improved and this device is designed compactly.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

[0031]

As described above, according to the present invention, since it is configured as described above, it is squeezed and compressed between the curved compression surfaces which are concavely curved toward the inner side, so that it is extremely strong (hard) and solid dry ice is not affected by a large compression force. Can be compacted, the device can be downsized, and the dry ice to be molded can be miniaturized into a spherical shape or a lump close to a spherical shape, and it is extremely excellent that it is possible to continuously mold as many solid dry ice pieces with a predetermined shape as desired. A dry ice manufacturing method and a dry ice forming apparatus are provided.

Claims (2)

[Claims] 1. A dry carbon dioxide is ejected into a dry ice forming chamber to generate snow-like dry ice, and the snow-like dry ice is compressed by a press piston inserted into the dry ice forming chamber to form solid dry ice. The compression receiving surface on one side and the compression surface movable by the press piston on the other side are formed as curved compression surfaces concavely curved inwardly facing each other. Compressing the snow-like dry ice while making the compression surfaces close to each other and exhausting an excess gas from the exhaust portion provided on the curved compression surfaces between the curved compression surfaces to form spherical or nearly spherical solid dry ice. A method for producing dry ice, comprising: 2. A dry ice forming chamber is formed by arranging a compression receiving surface on one side of a dry ice forming cylinder, and arranging a compression surface opposite to the compression receiving surface to form a dry ice forming chamber. A press piston device capable of moving the surface is provided so that the compression surface can be separated from the compression receiving surface, and a spray hole portion for spraying liquid carbon dioxide into the dry ice forming chamber to generate snow-like dry ice is dried. Provided in the ice molding chamber, the opposing compression receiving surface and the compression surface are respectively formed as curved compression surfaces that are concavely curved inwardly facing each other, and the compression surface is brought closer to the compression receiving surface so that snow is generated between the curved compression surfaces. An apparatus for producing dry ice, characterized in that, when compressing the dry ice, an exhaust portion capable of forming spherical or nearly spherical solid dry ice while exhausting excess gas is provided on the curved compression surface.