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JP-2026075120-A - Method for manufacturing a hydraulic molded body

JP2026075120AJP 2026075120 AJP2026075120 AJP 2026075120AJP-2026075120-A

Abstract

[Problem] To provide a method for manufacturing a hydraulic molded article that can obtain excellent strength even with a high bone meal content. [Solution] A hydraulic composition containing Portland cement and bone meal, with a bone meal content of 30 to 60 wt% (excluding water), is poured into a mold, allowed to harden, and then demolded to remove the hydraulic molded body. The bone meal content is 40 to 150 parts by mass per 100 parts by mass of Portland cement. This makes it possible to obtain a bone Buddha with a high bone meal content and excellent strength. [Selection Diagram] Figure 1

Inventors

  • 荒井 正道
  • 石井 寛人

Assignees

  • 宗教法人光明院

Dates

Publication Date
20260507
Application Date
20260303

Claims (9)

  1. A method for producing a hydraulic molded body, comprising: casting a hydraulic composition containing Portland cement and bone meal, wherein the bone meal content (excluding water) is 30-60 wt%, into a mold, allowing it to harden, and then demolding to remove the hydraulic molded body.
  2. The method for producing a hydraulic molded article according to claim 1, wherein the bone meal content is 40 to 150 parts by mass per 100 parts by mass of the Portland cement.
  3. The method for producing a hydraulic molded article according to claim 2, wherein the water-cement mass ratio of the hydraulic composition is 0.30 to 0.60.
  4. The method for producing a hydraulic molded article according to any one of claims 1 to 3, wherein the Portland cement is white Portland cement.
  5. A method for producing a hydraulic molded article according to any one of claims 1 to 3, wherein the hydraulic composition is a mortar composition.
  6. A method for producing a hydraulic molded article according to any one of claims 1 to 3, wherein the size of the bone powder is 2 mm or less.
  7. The method for manufacturing a hydraulic molded article according to any one of claims 1 to 3, wherein the mold is composed of multiple parts arranged in a vertical direction from the bottom to the top, and the multiple parts are detachable.
  8. The method for manufacturing a hydraulic molded body according to any one of claims 1 to 3, wherein the hydraulic molded body is part of or all of a Buddhist statue.
  9. A method for hardening a hydraulic composition, comprising casting a hydraulic composition containing Portland cement and bone meal, wherein the bone meal content excluding water is 30 to 60 wt%, into a mold, allowing it to harden, and then demolding to remove a hydraulic molded body.

Description

An application for application of Article 30, Paragraph 2 of the Patent Law has been filed. It was published on November 23, 2023, on the website of the religious corporation Komyoin (https://koumyouin.net/), on November 23, 2023, on the video sharing site (https://www.youtube.com/watch?v=fy7D-OZmY-E&t=4940s), on November 23, 2023, within the religious corporation Komyoin, and on November 23, 2023, in "Komyoin Gokotsubutsu Kanshabutsu" published by the religious corporation Komyoin. This invention relates to a method for manufacturing a hydraulic molded article using cement. Traditionally, it has been practiced to create objects such as Buddhist statues, tombstones, memorial tablets, lanterns, and animal figures from the bone powder remaining after cremation, and to enshrine these objects (see, for example, Patent Document 1). For instance, a bone Buddha statue, created from cremated remains, combines the worship of Buddha with the idea of ancestor veneration, thus attracting the faith of many people. Furthermore, because it contains cremated remains, a bone Buddha statue can also provide comfort to bereaved family members and those connected to the deceased. However, conventional sculptures containing bone powder tend to have a low bone powder content in order to maintain strength, and it is desirable to include as much bone powder as possible. Furthermore, given social factors such as a declining birthrate, an aging population, a high death rate, and an increase in unclaimed graves, there is a growing consideration to collect bones that have been deceased for a certain period of time or bones of unclaimed individuals to create bone Buddhas, which will serve as objects of worship for many people. On the other hand, since bone Buddhas are often installed inside temples and shrines, it is desirable to include as much bone powder as possible in a bone Buddha of a limited size while maintaining strength. Japanese Patent Application Publication No. 9-300896 Figure 1 is a flowchart showing a method for manufacturing a hydraulic molded article using this technology.Figure 2 is a schematic front view of a bone Buddha statue.Figure 3 is a schematic front view showing the main image of the Buddha in a bone Buddha.Figure 4 is a schematic front view showing the upper lotus section of a bone Buddha statue.Figure 5 is a schematic front view showing the lower lotus section of a bone Buddha statue.Figure 6 is a schematic front view showing the halo portion of a bone Buddha statue.Figure 7 is a photograph showing a Buddhist statue made from bones using this technology. Hereinafter, embodiments of the present invention will be described in detail in the following order with reference to the drawings. 1. Method for manufacturing hydraulic molded articles 2. Examples <1. Method for manufacturing a hydraulic molded article> Figure 1 is a flowchart showing a method for manufacturing a hydraulic molded body using this technology. As shown in Figure 1, the method for manufacturing a hydraulic molded body includes a preparation step (A) for preparing a hydraulic composition, a casting step (B) for casting the hydraulic composition into a mold, a curing step (C) for hardening the hydraulic composition, a demolding step (D) for demolding the hydraulic molded body from the mold, and a finishing step (E) for assembling and coloring the hydraulic molded body. The hydraulic molded body may be all or part of a sculptural object such as a Buddhist statue, tombstone, memorial tablet, lantern, or animal. The bone powder is preferably made from crushed cremated bone, and preferably has been treated with sterilization, drying, and heating. Below, as a specific example of a method for manufacturing a hydraulically hardened molded body, we will describe in detail the manufacturing process of a Buddhist statue made of bone, specifically the preparation process (A), casting process (B), hardening process (C), demolding process (D), and finishing process (E). Figure 2 is a schematic front view of a bone Buddha, and Figures 3 to 6 are schematic front views of the main image section, upper lotus section, lower lotus section, and halo section of the bone Buddha, respectively. As shown in Figures 2 to 6, the manufacturing method of the bone Buddha, as a specific example, involves shaping the bone Buddha into four parts: the main image section 11, the upper lotus section 12, the lower lotus section 13, and the halo section 14, and then assembling these parts to create the bone Buddha. [Preparation step (A)] In preparation step (A), a hydraulic composition containing Portland cement and bone meal is prepared. The hydraulic composition may be a mortar composition containing fine aggregate or a concrete composition containing coarse aggregate. Here, fine aggregate refers to aggregate that passes through a 10 mm sieve and whose mass accounts for 85% or more of the total is less than 5 mm in size. Coarse aggregate refers to aggregate that accumulates on a 5