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Twin-Plunger Air-Chamber Churn: Two Plungers Throw the Cream Through a Middle Chamber
Emma

作成者

Emma

6. 10月 2026SE
32
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Twin-Plunger Air-Chamber Churn: Two Plungers Throw the Cream Through a Middle Chamber

Andrews made the cream do the travelling, back and forth through a middle chamber. John Andrews of Middlesex County, Massachusetts, received US 7,298, dated 23 April 1850, for a churn box divided by two vertical partitions into three apartments, with a series of holes "at or near its bottom" in each partition, "unprovided with valves." Each outer chamber has a plunger on a rod jointed to a brake, "one of the said plungers being elevated while the other is being depressed," so the cream is thrown "back and forth in several streams through the air chamber." Holes near the partitions' tops let air in under each rising plunger. This rung works out the streams, then prints the partitions and plungers, builds the box and brake, and makes butter.
中級者
About 5 hours, plus printing

手順

1

The streams

Jupyter ノートブックを読み込み中…
2

Two dashers worked oppositely by one lever before it

The embedded blueprint works two dashers in one churn from a lever. Andrews puts each plunger in its own chamber so the cream must flow between them.
3

Read US 7,298

"Through each of the partitions a, b, and near the upper part thereof, I make one or more holes d, d, d, &c., as seen in Figs. 2 and 3, they being so arranged that the plunger F or F', during its upward stroke, shall pass partially or wholly above them, and in order to allow air to rush through said hole or holes and into the space directly under the plunger. The descent of the plunger forces such air into and through the cream."
4

Print the parts

Print two partitions with their foot holes and air holes, two plungers and the brake hub. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

このステップの材料:

PETGフィラメントPETGフィラメント1 個

必要な工具:

FDM 3D プリンターFDM 3D プリンター
5

Print the partition

The partition, printed as step 4 describes.
デザインファイルSTLCC0 - Free
6

Print the plunger

The plunger, printed as step 4 describes.
デザインファイルSTLCC0 - Free
7

Print the brake hub

The brake hub, printed as step 4 describes.
デザインファイルSTLCC0 - Free
8

The box

Take a food-safe box about 230 × 120 × 160 mm. Glue the two partitions across it in silicone, dividing it into three equal chambers.

このステップの材料:

食品級の保存容器食品級の保存容器1 個
シリコーンシーラントシリコーンシーラント1 個

必要な工具:

クランプクランプ
メジャー(巻尺)メジャー(巻尺)
9

Plungers and brake

Glue a 12 mm hardwood dowel rod in each plunger. Screw two pine standards to the box's middle, pass a dowel through them as the rocker shaft, and fix a pine brake across it with the hub. Join each rod to an end of the brake on a loose screw, so one plunger rises as the other falls.

このステップの材料:

堅木のダボ堅木のダボ1 個
松板松板1 個
小ねじ小ねじ1 個
六角ナット六角ナット1 個
木工用接着剤木工用接着剤1 個
#8 × 1 インチ木ねじ#8 × 1 インチ木ねじ1 個

必要な工具:

手のこぎり手のこぎり
コードレスドリルコードレスドリル
ドリルビットセットドリルビットセット
ドライバーセットドライバーセット
10

The patent drawing

US 7,298 drawing sheet, public domain (expired patent).
ステップ 10 - Image 1
11

Rock the brake and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1.5 litres, below the top holes. Rock the brake steadily up and down; time until the butter comes. Pour off the buttermilk, add cold water, churn a little and pour off again until it runs clear; work in a pinch of salt and weigh the butter.

このステップの材料:

生クリーム生クリーム1500 ml
粗い海塩粗い海塩1 個
水水1 個

必要な工具:

差しっぱなしのプローブ温度計差しっぱなしのプローブ温度計
ストップウォッチストップウォッチ
デジタルキッチンスケールデジタルキッチンスケール
ステンレス鋼の大きな混ぜ鉢ステンレス鋼の大きな混ぜ鉢
12

Plungers that stick, cream over the top

Twin-plunger air-chamber churn troubleshooting.

Flow

Loading...
13

History and honest limits

**John Andrews** of Middlesex County, Massachusetts, received US 7,298, dated 23 April 1850. He wrote that the streams "so intermingle air with the lacteal matter as to very quickly oxygenate and cause a separation"; that is his account. He claimed the combination of the external chambers, their plungers and passages with the middle or air chamber, and the air-entering passages d. **Honest limits.** A food-safe box and printed parts stand in for his wooden box and plungers. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

材料

12

必要な工具

11

設計ファイル

3

CC0 パブリックドメイン

このブループリントはCC0で公開されています。許可を求めずに、自由にコピー、修正、配布、あらゆる目的で使用できます。

メイカーを応援するには、ブループリント経由で製品を購入してください。メイカーには メイカーコミッション がベンダーにより設定されています。または、このブループリントの新しいイテレーションを作成し、自分のブループリントにコネクションとして含めて収益を共有できます。

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