JP2001335311A - Apparatus and method of molding dry ice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for readily remolding a remaining dry ice or the like without causing cracks or useless work. SOLUTION: This dry ice molding apparatus 100 comprises a base 102 arranged on a body 101, a molding frame 103 which is provided ascendably and descendably on the base 102, a water atomizing part 104 (a water atomizing means) which atomizes water on the inner wall of the molding frame 103, a pressing part 105 (a pressing means) which is provided with a press plate 51 that is insertably arranged in the inner space of the molding frame 103, and a feeding tray 106 which is protrudingly arranged at the front side of the molding frame 103.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry ice molding machine for molding powdery dry ice into a predetermined shape.

[0002]

2. Description of the Related Art Dry ice is distributed as a block of a fixed weight, for example, in a 25 kg cube.
Weights below this are subdivided by cutting the cube at the point of sale.

[0003]

However, when cutting dry ice, residues and chips are generated at the time of weight adjustment, and the residues and chips cannot be sold. In this case, waste corresponding to the residue and chips is generated. In addition, pieces of dry ice generated by breakage and dry ice deformed by sublimation cannot be sold in the same manner as described above.

On the other hand, a method has been devised in which a residue of dry ice, chips and chips are put into a mold and compressed to form a dry ice lump having a predetermined shape again. However, there is a problem that the dry ice formed by compression is adsorbed on the mold and hardly comes off. Further, sublimation of dry ice at the time of compression causes cracks in the formed dry ice and reduces the weight of the dry ice to cause waste.

The present invention has been made in view of these points, and has as its object to provide a means for easily reshaping dry ice from the residue of dry ice without causing cracks or waste. And

[0006]

According to a first aspect of the present invention, there is provided a dry ice forming machine, comprising: a flat base provided on an airframe; and an inlet for powdery dry ice. Having a opening at the lower end thereof for discharging the formed dry ice, and a molding frame provided on the base so as to be able to move up and down,
Pressurizing means which is fitted into the internal space of the molding frame and presses powdery dry ice put into the internal space of the molding frame with a press plate provided so as to be movable up and down. In the machine, all of the upper surface of the base, the inner wall of the molding frame, and the lower surface of the press plate are made of polytetrafluoroethylene. Thereby, the polytetrafluoroethylene insulates the powdery dry ice, suppresses sublimation of the dry ice, and suppresses the molded dry ice from adsorbing on the inner wall.

A dry ice forming machine according to a second aspect of the present invention has a flat base provided on the body and an inlet for powdery dry ice.
It has an opening for discharging the formed dry ice, a molding frame provided on the base so as to be able to move up and down, and is inserted into an internal space of the molding frame, and is provided so as to be able to move up and down. Pressurizing means for pressing the powdery dry ice put into the internal space of the molding frame by a press plate, wherein a water spray means for spraying water on the inner wall of the molding frame is provided. Is what you do. As a result, the powdery dry ice is compression-molded into a certain shape surrounded by the base, the molding frame, and the press plate, and an ice film is formed on the surface of the molded dry ice, and the dry ice is formed. Prevents adhesion to the inner wall of the molding frame.

According to a third aspect of the present invention, there is provided a dry ice molding machine according to the first or second aspect, wherein the molding frame has a gas vent passage communicating between the internal space and the external space. Things. Thus, when the powdery dry ice is compressed, the carbon dioxide gas generated by sublimation of a part of the dry ice is discharged to the outside of the molding frame through the gas release passage.

According to the present invention (claim 4), in the dry ice molding machine according to claim 3, the molding frame has a rectangular cross section, and each corner of the rectangle has
The gas vent passage extends vertically.

According to a fifth aspect of the present invention, there is provided a dry ice molding machine according to the first or second aspect, wherein the dry ice molding machine is provided in contact with a peripheral edge of an inlet of the molding frame. An input tray including a receiving plate bent along the shape of the input port and having an opening on the upper side, and a sliding plate provided on the receiving plate so as to be able to advance and retreat toward the input port. Is what you do. Thereby, the powdery dry ice placed on the receiving plate is pushed forward by the sliding plate and is put into the inlet.

The dry ice molding method according to claim 6 of the present invention is directed to a dry ice molding method in which powdery dry ice is put into a molding frame, and then the powdery dry ice is compressed and molded into a predetermined shape. Spraying water on the inner wall of the molding frame before pouring the powdery dry ice into the molding frame.

[0012]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a schematic diagram showing a configuration of a main part of a dry ice forming machine 100 according to an embodiment of the present invention. FIG. 1 (a) is a schematic diagram of a front side, and FIG. It is a schematic diagram. FIG. 2 is a schematic view showing the appearance of the front surface of the dry ice molding machine 100. As shown in FIGS. 1 and 2, the present dry ice forming machine 100 includes a base 102 provided on a body 101, and a base 102.
A molding frame 103 provided on the top so as to be movable up and down;
Water spraying unit (water spraying means) 104 for spraying water on the inner wall 3
And a pressurizing unit (pressurizing means) 105 having a press plate 51 fitted and provided in the internal space of the molding frame 103.
And the input tray 10 protruding from the front side of the molding frame 103.
6 is provided. Further, on the base 102, a take-out arm 107 for taking out the formed dry ice is provided so as to be slidable in the front direction. Further, on the front side of the body 101, the dry ice forming machine 100 is provided. A control box 108 for controlling the operation is provided.

As shown in FIGS. 1 and 2, the base 102 comprises a flat plate 21 covered with a Teflon (registered trademark) plate 22 made of polyfluoroethylene.
01 is fixed. The Teflon plate 22 is
3 is large enough to be mounted thereon.

As shown in FIGS. 1 and 2, the molding frame 103 is provided on the base 102 so as to be able to move up and down, and until the molding frame 103 is placed on the Teflon plate 22 of the base 102. It can be lowered, while it can be raised higher than the height of the dry ice to be molded.
The lifting and lowering of the molding frame 103 is performed by a molding frame vertical hydraulic cylinder 35 provided on the body 101, and as shown in FIG.
The upper and lower hydraulic cylinders 35 of the molding frame are connected to a hydraulic device 11 including a hydraulic pump, a valve, and the like provided on the body 101, and a control box 10 is provided.
8 is controlled.

As shown in FIG. 1, the molding frame 103 includes an outer frame 31 having openings at upper and lower ends and having a rectangular cross section, and a Teflon plate 32 made of polyfluoroethylene is provided on each inner side surface of the outer frame 31. Has been fixed. FIG.
FIG. 4 is a diagram showing the shape of the molding frame 103 in the -A cross section, as shown in the figure, each Teflon plate 32 has substantially the same shape as the shape of the inner surface of the corresponding outer frame 31;
At both side ends, they are provided so as not to be in close contact with each other and to have a slight gap. Thereby, at each corner inside the outer frame 31, a space serving as the gas release passage 33 is formed in the outer frame 3.
1 and extends vertically, and is provided with a gas vent passage 3 through the gap.
3, the internal space and the external space of the molding frame 103 are communicated with each other. As shown in FIGS. 1B and 2, an inlet 34 is provided on a front side surface of the molding frame 103, and powdery dry ice is supplied from the inlet 34 by the input tray 106. It is put into the internal space of the molding frame 103.

As shown in FIG. 1A, the water spray section 104 comprises a nozzle 41 for spraying water, a pump 42, and a tank 43 for storing water to be sprayed.
A pair of nozzles 41 are provided near the upper end of the molding frame 103 so that water can be sprayed on the entire Teflon plate 32 of the molding frame 103. The position and the number of the nozzles 41 to be disposed should be appropriately set in consideration of the shape and size of the molding frame 103 so that water can be sprayed uniformly on the entire Teflon plate 32 of the molding frame 103. Is desirable.

The pressing section 105 includes a press plate 51 and a molding hydraulic cylinder 52 as shown in FIG. 1, and the press plate 51 is provided with the press plate 51 as shown in FIG. The molding frame 103 is fitted into an inner space surrounded by the Teflon plate 32 and is provided so as to be able to move up and down by a molding hydraulic cylinder 52 and to be able to press downward. A Teflon plate 53 is provided on the lower surface of the press plate 51. Thereby, the molding frame 10
In a state where 3 is placed on the base 102, a fixed space is surrounded by the base 102, the molding frame 103, and the press plate 51 to form a dry ice mold to be molded. The molding hydraulic cylinder 52 is also connected to the hydraulic device 11 including a hydraulic pump, a valve and the like provided on the body 101 and controlled by the control box 108, similarly to the molding frame vertical hydraulic cylinder 35. ing.

FIG. 4 is a front view for explaining the detailed configuration of the input tray 106, and FIG.
It is sectional drawing which shows the -B cross section. In each figure, the molding frame 1
03 is in a state of being lowered on the base 102, and the input tray 106 is in a state of the molding frame 103 in the state of being lowered.
A receiving plate 61 which is provided so as to be in contact with the peripheral edge of the input port 34, is bent along the shape of the input port 34, and has an opening on the upper side; And a sliding plate 62 provided so as to be able to advance and retreat toward.

More specifically, the receiving plate 61
Is bent along the bottom side and both side sides of the input port 34 and is expanded toward the upper side, and the sliding plate 62 is provided with the receiving plate 3
4 is in close contact with the bottom surface and both side surfaces. A pair of rails 63 are provided on both sides of the receiving plate 61, and cutouts are provided on both sides of the sliding plate 62 at positions corresponding to the rails 63. Thus, the sliding plate 62 advances and retreats along the rail 63. A handle 64 is provided on the front side of the sliding plate 62, and a sliding plate 62
Is fixed to the inlet 34 side. The input tray 106 is fixed to the machine body 101 (not shown) via a flat attachment member 66.

Hereinafter, the operation of the dry ice forming machine 100 will be described with reference to FIGS. In the initial state, as shown in FIG. 6, the molding frame 103 and the press plate 51 are both in a state of being raised to the standby position.
When the operator operates the control box 108, first, the rod of the molding frame vertical hydraulic cylinder 35 is extended,
The molding frame 103 is lowered until it is placed on the base 102, that is, until the opening at the lower end of the molding frame 103 is in close contact with the Teflon plate 22 of the base 102. Thereafter, as shown in FIG.
A predetermined amount of water is sprayed on the surface of each Teflon plate 32 (water spraying step).

Here, the operation of the dry ice molding machine 100 is temporarily stopped. The worker uses the dry ice molding machine 10
When 0 stops, the predetermined amount of powdered dry ice 1 is put in the receiving plate 61 of the input tray 106, and the sliding plate 62 is pushed toward the input port 34 of the molding frame 103, as shown in FIG. Then, the powdery dry ice 1 is charged into the inside of the molding frame 103 (a powdery dry ice charging step). The powdery dry ice 1 to be charged may be a mixture of pieces and the like, but remolding is easier if the pieces and the like are pulverized in advance to make them all powdery.

When the addition of the powdery dry ice 1 is completed,
The operator operates the control box 108 again to restart the operation of the dry ice molding machine 100, the rod of the hydraulic cylinder 52 for molding is extended, the press plate 51 descends in the internal space of the molding frame 103, and the powder The dry ice 1 is pressed at a predetermined pressure. As a result, as shown in FIG. 9, the powdery dry ice 1 is compressed to form the fixed dry ice 2 surrounded by the base 102, the molding frame 103 and the press plate 51 (compression step).
At this time, the powdery dry ice 1 is thermally insulated by the Teflon plate 22 of the base 102, the Teflon plate 32 of the molding frame 103, and the Teflon plate 53 of the press plate 51, so that the powdery dry ice 1 Is not transmitted, so that the sublimation of the powdery dry ice 1 hardly occurs. further,
Even if a part of the powdery dry ice 1 sublimates during the compression to generate carbon dioxide gas, the gas release passage 33 is provided at each corner of the molding frame 103, so that the carbon dioxide gas is Through the removal passage 33, it comes out of the molding frame 103.

Next, the rod of the molding hydraulic cylinder 51 is retracted, the press plate 51 is slightly raised, and the pressure applied to the molding dry ice 2 is released. Is retracted and the molding frame 103 is raised. At the same time, the molding hydraulic cylinder 51 is further contracted, and the press plate 51 is also raised to the standby position. Thereby, as shown in FIG. 10, the molded dry ice 2 is discharged from the opening at the lower end of the molding frame 103 and remains on the base 102 (discharge step). Since water has been sprayed on the inner wall of the Teflon plate 32 of the molding frame 103 in advance by the water spraying unit 104, the water forms an ice film on the surface of the molding dry ice 2 and
Is prevented from adhering to the Teflon plate 32. Molding frame 1
03 and the press plate 51 are completely raised to the standby position, the take-out arm 107 is pulled out, and the molded dry ice 2 is taken out.

As described above, according to the dry ice molding machine 100 according to the present embodiment, the inner wall of the molding frame 103 which comes into contact with the molding dry ice 2 is made of polytetrafluoroethylene. The dry ice 2 is insulated and can suppress sublimation. As a result, the wear rate of the conventional dry ice using iron or stainless steel (the amount of dry ice reduced by sublimation) is about 5%, but can be reduced to 2% or less in the present invention.

Further, according to the present dry ice molding machine 100, the water spraying section 104 is provided, and water is sprayed on the inner wall of the molding frame 103 so that an ice film is formed on the surface of the molded dry ice 2. This prevents the molded dry ice 2 from adhering to the Teflon plate 32 of the molding frame 103.

Further, a gas vent passage 33 provided at each corner of the molding frame 103 removes carbon dioxide gas generated by sublimation of a part of the powdery dry ice 1 when the powdery dry ice 1 is compressed. Since it is discharged to the outside of the molding frame 103, it is possible to prevent cracks and the like from occurring in the molded dry ice 2.

The receiving tray 6 is provided by the input tray 106.
The powdery dry ice 1 placed on the top 1 is pushed into the input port 34 of the molding frame 103 by being pushed by the sliding plate 62, so that the powdery dry ice 1 remains on the receiving plate 61. In addition, the powdery dry ice 1 can be reliably charged into the charging port 34 by a single operation.

In the dry ice molding machine 100 according to the present embodiment, the pressurizing section 105 is composed of the press plate 51 and the molding hydraulic cylinder 52, but instead of the molding hydraulic cylinder 52. The press plate 51 may be raised and lowered using a jack or the like, and the powdery dry ice 1 put into the internal space of the molding frame 103 may be compression molded.

Further, in the present embodiment, the gas vent passages 33 are formed to extend vertically at each corner of the molding frame 103, but they may be provided at other positions of the molding frame 103. The same effect as in the present embodiment can be obtained.

Further, in the present embodiment, the Teflon plates 22, 32, 53 made of polyfluoroethylene are used for the portions in contact with the molded dry ice 2, but other fluororesins, for example, poly Even when chlorotrifluoroethylene, polyvinylidene fluoride, or the like is used, the same effect as in the present embodiment can be obtained.

[0031]

As described above, according to the dry ice forming machine of the present invention, the dry ice forming machine has a flat base provided on the fuselage and an inlet for powdery dry ice.
At the lower end thereof, there is provided an opening for discharging the formed dry ice, a molding frame provided on the base so as to be able to move up and down, and inserted into the internal space of the molding frame, and Pressurizing means for pressing powdery dry ice put into the internal space of the molding frame by a freely provided press plate, a dry ice molding machine comprising: an upper surface of the base; an inner wall of the molding frame; Since both the lower surface of the press plate and the lower surface of the press plate are made of polytetrafluoroethylene, the polytetrafluoroethylene insulates the powdery dry ice, suppresses the sublimation of the dry ice, and forms the formed dry ice. Ice is prevented from adsorbing on the inner wall or the like. This allows
Dry ice can be easily remolded using the residue, chips, pieces, and the like of the dry ice.

Further, according to the present invention, a flat base provided on the fuselage and an inlet for powdery dry ice are provided, and an opening for discharging the formed dry ice is provided at the lower end thereof. A molding frame provided on the base so as to be able to move up and down, and inserted into the inner space of the molding frame, and is put into the inner space of the molding frame by a press plate provided so as to be able to move up and down. And a pressurizing means for pressing the powdered dry ice, wherein the dry ice forming machine is provided with a water spraying means for spraying water on the inner wall of the molding frame. Is formed into a fixed shape surrounded by a molding frame and a press plate, and an ice film is formed on the surface of the molded dry ice, and the dry ice adheres to the inner wall of the molding frame. Prevent the door. This makes it possible to easily re-form dry ice using the residue, chips, pieces and the like of dry ice.

Further, according to the present invention, since the molding frame has a degassing passage communicating the inner space and the outer space, the powdered dry ice is compressed when the powdered dry ice is compressed. The carbon dioxide gas generated by sublimation of a part of the gas is discharged to the outside of the molding frame through a gas vent passage. This can prevent cracks and the like from occurring in the formed dry ice.

According to the present invention, the molding frame has a rectangular cross section, and each corner of the rectangle has
Since the gas vent passage extends vertically, the carbon dioxide can be efficiently discharged to the outside of the molding frame.

According to the present invention, the receiving plate is provided in contact with the periphery of the charging port of the molding frame, and is bent along the shape of the charging port and has an opening on the upper side. And a sliding plate provided on the receiving plate so as to be able to advance and retreat toward the input port, so that the powdery dry ice placed on the receiving plate is provided. Is pushed forward by the sliding plate and inserted into the input port. Thereby, the powdery dry ice can be reliably injected into the inlet by a single operation without the powdery dry ice remaining on the receiving plate.

Further, according to the method for molding dry ice according to the present invention, after the powdery dry ice is charged into the molding frame,
The dry ice molding method of compressing the powdery dry ice into a fixed shape includes a step of spraying water on an inner wall of the molding frame before introducing the powdery dry ice into the molding frame. Therefore, an ice film is formed on the surface of the molded dry ice to prevent the dry ice from adhering to the inner wall of the molding frame. This makes it possible to easily re-form dry ice using the residue, chips, pieces and the like of dry ice.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a main part of a dry ice forming machine 100 according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an appearance of a dry ice forming machine 100 according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a cross-sectional structure of a molding frame 103.

FIG. 4 is a front view for explaining a detailed configuration of the input tray 106.

FIG. 5 is a cross-sectional view illustrating a cross-sectional structure of the input tray 106.

FIG. 6 is a schematic diagram for explaining an operation of the dry ice forming machine 100 in an initial state.

FIG. 7 is a dry ice forming machine 1 in a water spraying step.
It is a schematic diagram for demonstrating the operation of 00.

FIG. 8 is a schematic diagram for explaining an operation of the dry ice forming machine 100 in a powdery dry ice charging step.

FIG. 9 is a dry ice forming machine 10 in a compression step.
It is a schematic diagram for demonstrating operation | movement of 0.

FIG. 10 is a dry ice forming machine 1 in a discharging step.
It is a schematic diagram for demonstrating the operation of 00.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 powdery dry ice 2 molded dry ice 100 dry ice molding machine 101 body 102 base 103 molding frame 104 water spraying section 105 pressurizing section 106 input tray 22, 32, 53 Teflon plate 33 gas vent passage 34 input port 51 press plate 61 Receiving plate 62 Sliding plate

Claims (6)

[Claims] 1. A flat base provided on an airframe, having an inlet for powdery dry ice, and having an opening at a lower end thereof for discharging the formed dry ice, A molding frame provided on the base so as to be able to move up and down, and is inserted into the internal space of the molding frame, and
Pressurizing means for pressing powdery dry ice introduced into the internal space of the molding frame by a press plate provided so as to be able to move up and down, wherein the upper surface of the base, the inner wall of the molding frame And a lower surface of the press plate is made of polytetrafluoroethylene. 2. A flat base provided on the fuselage, having an inlet for powdery dry ice, and having an opening at a lower end thereof for discharging the formed dry ice, A molding frame provided on the base so as to be able to move up and down, and is inserted into the internal space of the molding frame, and
And a pressurizing means for pressing the powdery dry ice put into the internal space of the molding frame by a press plate provided to be able to move up and down. In the dry ice molding machine, water is sprayed on the inner wall of the molding frame. A dry ice molding machine comprising water spray means. 3. The dry ice molding machine according to claim 1, wherein the molding frame has a gas vent passage communicating the internal space and the external space. 4. The molding frame has a rectangular cross-sectional shape, and the gas vent passage extends vertically in each corner of the rectangular shape. Item 4. A dry ice molding machine according to Item 3. 5. A receiving plate which is provided in contact with a peripheral edge of an input port of the molding frame, is bent along the shape of the input port, and has an opening on an upper side; The dry ice molding machine according to claim 1 or 2, further comprising a loading tray comprising a sliding plate provided to move forward and backward toward the loading port. 6. After the powdery dry ice is put into a mold,
A dry ice molding method for compressing the powdery dry ice into a fixed shape, comprising the step of spraying water on an inner wall of the mold before introducing the powdery dry ice into the mold. Dry ice molding method.