日本最古の煉瓦工場で赤レンガを製造するプロセス。明治時代から受け継がれるレンガ製造の技術と歴史
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岡田煉瓦製造所は、現在日本で稼働しているレンガ工場の中で最も長い歴史を持つ工場です。 1897年に創設され、120年以上にわたってレンガを作り続けています。
『撮影協力』 【煉瓦の工場】 株式会社 岡田煉瓦製造所
📭 日本、〒444-444-1211 愛知県安城市根崎町西根283
📱Instagram https://www.instagram.com/okada_1897/
👨💻web https://okada-renga.com/
【三河土採掘業者】 株式会社 丸正
📭 日本、〒444-1201 愛知県安城市石井町福原33番地
👨💻web https://marusho-cray.co.jp/
【レンガの建物】 半田赤レンガ建物 📭 日本、〒475-0867 愛知県半田市榎下町8番地
👨💻web https://handa-akarenga-tatemono.jp/
『参考資料』 みかわこまち https://mikawa-komachi.jp/oldshop/okadarenga.html
※ドローンの映像は、法律を遵守し、適切な手続きを経て飛行させたものです。
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◾︎拘り -Kodawari- SNS 【Facebook】→https://www.facebook.com 【Instagram】→ https://www.instagram.com/kodawari.official/ 【Twitter】→https://twitter.com/kodawari_offi 【TikTok】→https://www.tiktok.com/@kodawari.official
撮影依頼、お仕事の依頼はこちらから 【Mail】→ kodawari.official@gmail.com
#japan #japanculture #japanese #japanesetools #asmr #craftsman #craftmanship #brick #bricks #日本 #日本の文化 #日本人 #職人 #職人技 #日本の職人 #手仕事 #伝統 #煉瓦 #レンガ #最古
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The transcript documents the brick-making process at Okada Brick Factory, demonstrating how raw clay is transformed through crushing, molding, drying, and firing into durable bricks that have remained structurally sound for over a century.
- Okada Brick Factory uses a multi-stage process combining clay from different sources to ensure consistent quality
- The factory's 1897-founded bricks remain in active use in buildings today, demonstrating exceptional durability
- Skilled craftsmanship and precise temperature control (1120°C firing) are central to the brick-making process
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The Handa Red Brick Building was constructed in 1898, using bricks from the founding days of Okada Brick Factory.
“The Handa Red Brick Building was constructed in 1898. Bricks from the founding days of 'Okada Brick' are still in use today.”
Okada Brick Factory was founded in 1897 and the word 'Okada Brick' is engraved on the chimney of the factory building itself.
“The 'Okada Brick Factory' was founded in 1897. The word 'Okada Brick' is engraved on the chimney.”
Bricks made by Okada Brick Factory in 1897, when the company was founded, still remain in buildings today over a century later.
“Bricks made in 1897, when the company was founded, still remain in buildings today.”
The kiln is 60 meters long and fires approximately 24,000 bricks at a time.
“The kiln is 60 meters long, and about 24,000 bricks are fired at a time.”
Bricks are visually inspected for major chips or cracks as part of the final quality control before shipment.
“The bricks are visually inspected for major chips or cracks.”
Cracked or chipped bricks are removed from the production line before firing to ensure only quality bricks are fired.
“Cracked or chipped bricks are removed. The removed bricks are reused.”
Skilled craftsmen manually stack bricks by hand to ensure even heat distribution during firing.
“The bricks are stacked to ensure even heat distribution. The bricks are stacked evenly by hand by skilled craftsmen.”
Kneading the clay ensures uniform composition, moisture content, and particle size before extrusion.
“The clay is kneaded to ensure uniform composition, moisture content, and particle size. The kneaded clay is extruded from the inside.”
Brick size is determined by accounting for shrinkage during drying and firing, so the wet clay is cut larger than the final desired brick dimensions.
“The size is determined by accounting for shrinkage during drying and firing.”
All bricks are fired for approximately two days total in the kiln.
“All the bricks are fired for about two days.”
Bricks are dried for 7 to 10 days in a drying room using residual heat from the kiln on the ground floor, with entrance temperature around 40°C and high humidity, and exit temperature around 80°C with lower humidity.
“The bricks are dried for 7 to 10 days. Large mobile fans are in operation. The dried bricks. The dried bricks are pushed out on carts. There are 36 carts lined up side by side. At the exit, the temperature is about 80°C, and the humidity is lower.”
Carts in the kiln move at 2 cm per minute during the firing process.
“The carts move 2 cm per minute.”
The Mikawa region is known for its high-quality clay, which serves as the raw material for Okada Brick Factory's production.
“The Mikawa region is known for its high-quality clay.”
In the vacuum pugmill, air is removed from the clay, and the clay is extruded from a narrowing exit to be molded into shape.
“The clay is placed into a vacuum pugmill. Air is removed from the clay in the vacuum chamber. The clay is extruded from a narrowing exit and molded into shape.”
The maximum temperature when firing red bricks is 1120°C.
“The maximum temperature when heating red bricks is 1120°C.”
Bricks are highly durable materials that continue to be loved by many people due to their longevity.
“For this reason, bricks are highly durable and continue to be loved by many people.”
Bricks use natural materials, making it very difficult to achieve the desired color in production.
“Since bricks use natural materials, it is very difficult to achieve the desired color.”
The firing temperature and method vary depending on the color and shape of the bricks being produced.
“The firing temperature and method vary depending on the color and shape of the bricks.”
Removed cracked or chipped bricks are reused in the production process rather than discarded.
“The removed bricks are reused.”
The factory sources Mikawa clay from two different excavation sites and blends them together to stabilize the quality of the final product.
“First, they supply the raw material, 'Mikawa clay.' The Mikawa region is known for its high-quality clay... Next, they supply Mikawa clay from a different excavation site into the second hopper. The purpose is to stabilize the quality.”
Irregularly shaped ends produced during cutting are sent back to the pugmill for reuse rather than discarded.
“The irregularly shaped ends are sent back to the pugmill.”
Okada Brick Factory's primary manufacturing commitment is to deliver bricks with the specific color and shape that customers request.
“I believe our commitment is to deliver bricks with the color and shape that our customers want.”
Okada Brick Factory's secondary commitment is to faithfully reproduce the desired color and deliver it to customers, addressing the challenge of color consistency with natural materials.
“Our Kodawari (commitment) is to faithfully reproduce the desired color and deliver it to our customers.”
The charm and aesthetic appeal of bricks increase as time passes, making them more desirable over extended periods.
“I think the charm of bricks increases as time passes.”
Moisture loss during the drying process results in a weight difference of 500g per brick between before and after drying.
“The moisture loss during drying results in a weight difference of 500g before and after drying.”
Fired bricks are cooled and unloaded from carts before being prepared for shipment.
“The fired bricks are cooled. They are unloaded from the carts and prepared for shipment.”
The completed bricks are bundled together and wrapped to prevent collapse during transportation.
“The completed bricks are bundled together. Packaging. The bricks are wrapped to prevent collapse during transportation.”
The clay is crushed through a two-stage process: first through a smaller roller to refine the clay, then through a larger roller in the second crusher to crush the clay into finer particles.
“A smaller roller is used to further refine the clay. Next, the clay is transported to the second crusher. A larger roller is used in the second crusher. The larger roller crushes the clay into finer particles.”
The thickness of bricks is adjusted by changing the width of the wire used in the cutting machine.
“The thickness of the bricks is adjusted by changing the width of the wire.”
The kiln is ignited by adjusting gas, and heat is applied from both sides, with heat rising from the bottom of the bricks.
“The gas is adjusted, and the kiln is ignited. Heat is applied from both sides, and the heat rises from the bottom of the bricks.”