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Rotary-Dasher Box Churn: Float Boards on Crossed Arms in a Curved Box
An up-and-down dash churn is slow, tiring work.
Rufus Porter of Billerica, Massachusetts, received US 735, dated 10 May 1838, for a churn: a box eighteen inches long with a bottom curved from end to end; a wooden shaft running between a hollow cone and a pointed centre screw; two parallel pairs of rods through the shaft at right angles, carrying float boards parallel with the shaft — "what is termed the rotary dasher" — turned by a crank whose twisted tenon is pressed into the shaft and comes out when the occasion requires.
This rung compares his churn's sweep with a tabletop one, then prints the dasher, builds the box, and makes butter.
Menengah
About 5 hours, plus printing
Instruksi
1
1
Butter yield and sweep
Butter yield and sweep
Memuat notebook Jupyter…
2
2
A board pushed through liquid before it
A board pushed through liquid before it
The embedded blueprint drives a boat with a flat paddle. Porter's float boards push through cream the same way, turning on a shaft.
3
3
Read US 735
Read US 735
"Four round bars or rods, sixteen inches long and one inch in diameter, pass through the shaft; two of these rods are parallel, and about five inches apart, each being one inch from one end of the shaft. The other two are parallel to each other, but at right angles with the first pair, and three inches apart; the four bars thus constituting eight arms."
4
4
Print the dasher
Print the dasher
Print the rotary dasher: core, two parallel pairs of arms at right angles, and four float boards (/uploads/blueprints/rotary-dasher-box-churn-dasher.stl). Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.
Material untuk langkah ini:
Filamen PETG1 buahAlat yang dibutuhkan:
Pencetak 3D filamen (FDM)5
5
Use a box with a curved bottom
Use a box with a curved bottom
Take a food-safe storage box about 150 × 100 mm and 150 mm deep. Drill both ends on the dasher's axis, 85 mm up. Bed a plywood strip curved from end to end in its floor with silicone, as his curved bottom.
Material untuk langkah ini:
Wadah penyimpan HDPE1 buah
Lembaran kayu lapis1 buah
Sealant Silikon1 buahAlat yang dibutuhkan:
Gergaji Coping
Bor Tanpa Kabel
Set Mata Bor6
6
Cone, centre screw and crank
Cone, centre screw and crank
File an M5 screw to a point and run it through one end as the centre screw into the dasher's end hole. Through the other end pass a 5 mm rod into the dasher's seat as the hollow-cone bearing, bent outside into a crank.
Material untuk langkah ini:
Sekrup mesin1 buah
Mur Segi Enam1 buah
Batang Baja Lunak1 buahAlat yang dibutuhkan:
Kikir (Kikir Tangan)
Ragum Meja
Kunci Inggris7
7
The patent drawing
The patent drawing
US 735 drawing sheet, public domain (expired patent).
8
8
Make butter
Make butter
Let 500 ml of heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour it into the box, close the lid, and crank steadily; time until the butter comes. Pour off the buttermilk, add cold water, churn a few turns and pour off again until it runs clear; work in a pinch of salt and weigh the butter.
Material untuk langkah ini:
Krim kental500 ml
Garam Laut Kasar1 buah
Air1 buahAlat yang dibutuhkan:
Termometer probe tinggal-pasang
Stopwatch
Timbangan Dapur Digital
Mangkuk aduk baja nirkarat (besar)9
9
A dasher that sticks, a box that leaks
A dasher that sticks, a box that leaks
Rotary-dasher box churn troubleshooting.
Flow
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10
10
History and honest limits
History and honest limits
**Rufus Porter** of Billerica, Massachusetts, received US 735, dated 10 May 1838. His box is eighteen inches long, ten wide and eighteen deep, of boards three-quarters of an inch thick; the bottom, three-eighths thick, is curved so its centre is three inches lower than its ends; a lid with ventilation apertures fits a rabbet; the float boards are eight inches long and three wide. He gave the dimensions of every part.
**Honest limits.** A storage box and a printed dasher at tabletop scale stand in for his. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.
Bahan
10- 1 buahPlaceholder
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- 500 mlPlaceholder
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Blueprint terkait
Blueprint ini berbagi pengetahuan — teknik, bahan, atau prinsip
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CC0 Domain Publik
Cetak biru ini dirilis di bawah CC0. Anda bebas untuk menyalin, memodifikasi, mendistribusikan, dan menggunakan karya ini untuk tujuan apa pun, termasuk komersial, tanpa meminta izin.
Dukung Maker dengan membeli produk melalui Cetak Biru mereka di mana mereka mendapatkan Komisi Pembuat yang ditetapkan oleh Penjual, atau buat iterasi baru dari Cetak Biru ini dan masukkan sebagai koneksi di milik Anda sendiri.