JP6499399B2 - Manufacturing method of burial glasses - Google Patents

Description

The present invention relates to a method of manufacturing burial spectacles stored in a cremation jar.

Cremation is aimed at obtaining burned bone, and therefore cannot continue burning for a long time at high temperatures. For example, if high-temperature combustion at 1,200 ° C. or higher continues, the body becomes completely “ash” and it is impossible to leave burned bone. In the current cremation furnace, the atmospheric temperature in the main combustion furnace is set to 800 to 900 ° C, and the exhaust gas from the main combustion furnace is secondarily burned at 800 to 900 ° C in the recombustion furnace to decompose organic substances in the exhaust gas. The mineralized exhaust gas is discharged by an exhaust treatment device.

However, since cremation cannot be performed at such a high temperature, dioxins are generated during cremation. In particular, if a plastic containing chlorine or the like is placed in a casket as a side funeral, the side funeral will burn and dioxins will be generated. Since cremation is not a waste incineration, it will not be subject to legal regulations, but when the aging of the country progresses in 2036 and Japan's death population reaches a peak of about 1.76 million, the facilities of the cremation furnace remain as they are. If any, the amount of dioxins generated is expected to reach 3.2-6.9 grams. This amount is about 35% of the amount of waste incinerators that are being regulated.

For this reason, in Hokkaido, for example, they are calling to refrain from putting dioxin-causing substances in caskets as by-products. In many cases, glasses, such as lenses and frames, are almost entirely made of plastic, and glasses are among the secondary funerals that should be held down. However, if the bereaved family used glasses before birth, they believed that they could use glasses in the post-mortem world by placing them in a cage as a side funeral and cremating them as they were, and strongly recommended that glasses be put in a cage as a side funeral. I hope.

In order to solve such a problem, for example, according to Japanese Patent Laid-Open No. 5-42185 and Japanese Patent Laid-Open No. 10-33603, it is disclosed that a wooden model is created as a sub-funeral and the wooden model is put in a casket and cremation is made. Has been.

In the above-mentioned conventional publication, because the model is made of wood, even if the glasses are such a wooden model, the lens part is not transparent, and no matter how much the model is, the feeling that the glasses have been sub-funded There is a problem that it is difficult to obtain. Moreover, since it is wooden, it is necessary to cut out one by one, and there is a problem that it takes man-hours for production and the price is high.

In Japanese Patent Application Laid-Open No. 2003-180767, auxiliary funeral glasses without the above-mentioned problems have been proposed. The proposed sub-funeral glasses are sub-funeral glasses stored in a cremation jar, and are formed of a transparent resin that does not generate dioxin by combustion.

If the sub-funeral glasses are made of a transparent resin that does not generate dioxin, the appearance will be similar to actual glasses even if the lens portion is made of this resin, and the bereaved family will not feel uncomfortable. The resin can be a lactic acid biodegradable plastic.

Japanese Patent Laid-Open No. 5-42185 JP-A-10-33603 JP 2003-180767 A

In JP-A-2003-180767, burial spectacles can be manufactured by injection molding, but such burial spectacles must be almost custom-made, and there are many types of molds. According to the injection molding that must be prepared, there is a problem that each one becomes expensive.

Therefore, according to the present invention, when the lens is formed of a biodegradable plastic and attached to the eyelid, it does not emit harmful gas. When worn, the lens has a face atmosphere almost equivalent to a lens formed of a normal material. An object of the present invention is to provide a method of manufacturing burial glasses that can manufacture such burial glasses at low cost.

The above object of the present invention is achieved by a method of manufacturing burial spectacles according to the present invention having the following configurations (1) to ( 8 ).
(1)
In the method of manufacturing burial spectacles in which the lens has a degree for correcting vision, the burial spectacles are spectacles that are cremated while worn by the deceased, and all the parts of the spectacles burn at the cremation temperature. A method for producing burial spectacles, characterized in that it is formed from a biodegradable plastic that does not generate harmful gases, and all the parts of the spectacles are manufactured using a 3D printer.
(2)
The method for manufacturing burial glasses according to (1), wherein the lens is for myopia and is a pickled lens.
(3)
The burial spectacles according to (2), wherein the bud lens is a Matahei lens or a Mataro lens.
(4)
The method for producing spectacles for burial according to any one of (1) to (3), wherein the biodegradable plastic is a polylactic acid-based biodegradable resin.
(5)
The method of manufacturing burial glasses according to any one of (1) to (4), wherein the 3D printer is of an inkjet powder lamination system.
(6)
The method for producing burial spectacles according to (5), wherein the powder to be used is a biodegradable plastic powder and the adhesive is a biodegradable plastic emulsion.
(7)
The method for manufacturing burial glasses according to any one of (1) to (6), wherein at least a lens and a frame are integrally formed.
(8)
The method for producing burial spectacles according to any one of (1) to (7) above, wherein the frame is made cloudy using a biodegradable plastic material that is clouded by introducing bubbles .

Since the method for manufacturing burial glasses according to the present invention uses the 3D printer to manufacture the burial glasses as described above, it is not necessary to prepare a mold as in the case of injection molding, and the cost is low. Can be manufactured one by one. Moreover, since the burial spectacles manufactured by the manufacturing method of the present invention are entirely made of biodegradable plastics, no harmful gas is generated even if they are attached to the heel, and the concave lens is a pickled lens. Since it is formed, it becomes almost the same degree as the glasses worn by the deceased before life, so the deceased wears and the face does not feel strange.

It is a perspective view which shows an example of the burial spectacles manufactured by embodiment of this invention. It is sectional drawing which shows the 1st form of the lens shown in FIG. It is sectional drawing which shows the 2nd form of the lens shown in FIG. It is a figure explaining manufacture with the 3D printer of the spectacles for burial shown in FIG. 1 (a frame and a lens are integrated).

FIG. 1 is a perspective view showing an example of burial glasses 10 manufactured by a method of manufacturing burial glasses according to an embodiment of the present invention.

The spectacles 10 includes a spectacle frame 12 and a concave or convex lens 14 attached thereto. The spectacle frame 12 includes a front portion 16, temples 18 attached to both sides of the front portion 16, and a pad 20. Naturally, the lens 14 is preferably transparent, and the spectacle frame 12 is preferably clouded.

The entire part of the glasses 10 is made of a biodegradable plastic, particularly a polylactic acid-based biodegradable resin, which burns at the cremation temperature and does not generate harmful gases. As this biodegradable plastic, those manufactured by Toray Industries, Inc. can be used.

When the lens 14 is a concave lens, it is preferable to use the matahei shown in FIG. 2 or the matarou shown in FIG. By doing so, the lens can be given a considerable degree and the edge can be made thin. Thus, when manufacturing a concave lens with a biodegradable plastic, since the biodegradable plastic has a low refractive index, the lens surface must have a considerably small curvature in order to achieve the same degree as the actual lens. The edge of the lens becomes considerably thick. However, if the matahei shown in FIG. 2 or the matalow shown in FIG. 3 is used, the edge of the lens can be made thin.

Next, a method for manufacturing a 3D printer (inkjet powder lamination method) of the burial spectacles 10 (the front portion 16 of the spectacle frame 12 and the lens 14 are integrated) shown in FIG. 1 will be described with reference to FIG.

In this method, the polylactic acid-based biodegradable resin as a powder, a transparent biodegradable plastic emulsion (for a lens) as an adhesive, and a biodegradable plastic emulsion in a cloudy state such as by introducing bubbles (For frame) is used.

First, a single layer of powder 32 is spread on a stage 30 with a roller (not shown), and then a biodegradable plastic emulsion in a cloudy state is applied to the front portion 16 of the frame by a head 36 of an inkjet 34. 14 parts are sprayed with a transparent biodegradable plastic emulsion to form a single layer of front and lens. FIG. 4 shows a transparent biodegradable plastic in which the powder where the adhesive is not sprayed is a normal white circle 32a, and the powder where the biodegradable plastic emulsion in the cloudy state is sprayed is a black circle 32b. The white powder 32c in which the dots are arranged is shown in the part where the emulsion was sprayed.

  After the first layer is completed, the stage 30 is lowered by the height of one layer of powder, and the above is repeated to manufacture the front of the frame with an integrated lens. Other parts may be made separately and attached later.

DESCRIPTION OF SYMBOLS 10 Glasses 12 Glasses frame 14 Lens 16 Front part 18 Temple 20 Pad 30 Stage 32 Powder 34 Inkjet 36 Head

Claims (8)

In the method of manufacturing burial spectacles in which the lens has a degree for correcting vision, the burial spectacles are spectacles that are cremated while worn by the deceased, and all the parts of the spectacles burn at the cremation temperature. A method for producing burial spectacles, characterized in that it is formed from a biodegradable plastic that does not generate harmful gases, and all the parts of the spectacles are manufactured using a 3D printer. The method of manufacturing burial glasses according to claim 1, wherein the lens is for myopia and is a pickled lens. The burial spectacles according to claim 2, wherein the bud lens is a Matahei lens or a Mataro lens. The method for manufacturing spectacles for burial according to claim 1, wherein the biodegradable plastic is a polylactic acid-based biodegradable resin. The method for manufacturing spectacles for burial according to any one of claims 1 to 4, wherein the 3D printer is of an ink jet powder lamination type. The method for producing burial spectacles according to claim 5, wherein the powder used is a biodegradable plastic powder and the adhesive is a biodegradable plastic emulsion. Any of the processes for preparation of the burial eyewear of claim 1 to 6 to integrally form at least the lens and the frame. The manufacturing method of the burial spectacles in any one of Claims 1-7 which makes a frame cloudy using the biodegradable plastic material made into cloudy by putting air bubbles .