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MICHEZO
TEKNOLOJIA
VAZI
Cast Acrylic Sheet
Pixel

Imeundwa na

Pixel

22. Septemba 2026FI
2
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Cast Acrylic Sheet

Otto Röhm had worked on acrylic chemistry since his 1901 doctorate. His firm first used polymethacrylate as the sticky middle layer of laminated safety glass - and noticed that the polymer came away from the glass plates cleanly, leaving a clear sheet as smooth as the glass. Sold from 1933 as Plexiglas, the sheet went into aircraft canopies within the decade. **US 2,154,639**, "Process for the manufacture of polymerization products", Röhm and Bauer, assigned to Röhm & Haas, filed 4. December 1935, granted 18. April 1939: methacrylic esters polymerised between sheets of glass and then separated from them, for "glass substitutes" whose faces are "as highly polished as the surfaces of the glass itself". **You use that polish**: an edge-lit sign whose engraving glows while the smooth faces stay dark, and two heat-bent offcuts that show how tight a bend the light survives.
Mwanzo
3 hours

Maagizo

1

Cut the panel

Keep the protective film on. Score 3 mm cast acrylic 200 x 120 mm with the utility knife against a ruler, 8 to 10 passes, then snap it over the bench edge. Cut two 100 x 30 mm offcuts the same way.

Vifaa kwa hatua hii:

Bamba la AkrilikiBamba la Akriliki1 kipande

Zana zinazohitajika:

Kisu cha kaziKisu cha kazi
Rula ya chumaRula ya chuma
Miwani ya usalama iliyo waziMiwani ya usalama iliyo wazi
2

Polish the light edge

Sand the 120 mm bottom edge flat, then run the Micro-Mesh grits in order until it is clear. Light enters here; a frosted edge scatters it at the door.

Zana zinazohitajika:

Seti ya Kusugua ya Nyavu Ndogo (Vipimo 9)Seti ya Kusugua ya Nyavu Ndogo (Vipimo 9)
3

Engrave the back

Peel the back film. Draw your design on paper, tape it under the sheet, and trace it with the engraving point at medium speed, light pressure.

Zana zinazohitajika:

Kifaa cha kuzunguka (aina ya Dremel)Kifaa cha kuzunguka (aina ya Dremel)
Ncha ya kuchongaNcha ya kuchonga
Miwani ya usalama iliyo waziMiwani ya usalama iliyo wazi
4

Slot the base

Cut a pine block 160 x 60 x 40 mm. Saw two parallel kerfs 3.5 mm apart, 15 mm deep, along its length and chisel out between them. Chisel a channel underneath for the LED strip to shine up into the slot.

Vifaa kwa hatua hii:

Ubao wa msonobariUbao wa msonobari1 kipande

Zana zinazohitajika:

Msumeno wa mkonoMsumeno wa mkono
Seti ya patasi za mtiSeti ya patasi za mti
5

Light it

Strip 5V, GND and DIN to the Uno's 5V, GND and D6. Install the Adafruit NeoPixel library and upload. Stand the panel in the slot.
edge_lit_panel.inocpp
// Edge-lit acrylic panel - batch 98, US 2,154,639
// A short WS2812B strip under the panel's bottom edge. Data -> D6 through the strip's own input.
#include <Adafruit_NeoPixel.h>

const int PIN = 6;
const int COUNT = 8;          // LEDs under the 120 mm edge
Adafruit_NeoPixel strip(COUNT, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.setBrightness(60);    // keep well under full power when run from USB
}

void loop() {
  // slow colour wheel: the engraving glows, the polished faces stay dark
  for (long hue = 0; hue < 65536; hue += 256) {
    strip.fill(strip.gamma32(strip.ColorHSV(hue)));
    strip.show();
    delay(30);
  }
}

Vifaa kwa hatua hii:

Ukanda wa LED wa NeopixelUkanda wa LED wa Neopixel1 kipande
Seti ya nyaya za Dupont (dume-jike)Seti ya nyaya za Dupont (dume-jike)1 seti

Zana zinazohitajika:

Arduino Uno R3Arduino Uno R3
SparkFun Cerberus USB Cable - 1.8 meterSparkFun Cerberus USB Cable - 1.8 meter
6

Bend two offcuts

Heat an offcut along a line on the strip heater, turning it over every 30 seconds, until it flexes. Bend it 90° round a 6 mm dowel and hold until cool. Bend the second round a 20 mm dowel.

Vifaa kwa hatua hii:

Kigingi cha mbaoKigingi cha mbao1 kipande

Zana zinazohitajika:

Kipasha joto cha mstari kwa akrilikiKipasha joto cha mstari kwa akriliki
Glavu za kulehemuGlavu za kulehemu
7

Trace the beam

In a dim room shine the laser pointer into the end of each bent strip, never towards anyone's eyes. See where light escapes at the bend, and compare with the notebook.

Zana zinazohitajika:

Kielekezi cha LezaKielekezi cha Leza
8

Critical angle and bends

Inapakia daftari la Jupyter…
9

History & Context

**What the patent specifies:** methacrylic esters polymerised between glass sheets and separated, giving a glass substitute with glass-polished faces. **Modern build (derived):** commercial cast acrylic sheet, cut and heat-bent. Cast sheet is still made between glass plates; cheaper extruded sheet came later and is softer and more prone to crazing. The limits: acrylic scratches, cracks if drilled carelessly, crazes when solvents or stress meet, and burns.
Hatua 9 - Image 1

Vifaa

5

Zana Zinazohitajika

13

Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Polycarbonate

Polycarbonate

na PennyDK

Mitambo

0
0
0
0
0
0
Laminated Safety Glass

Laminated Safety Glass

na MaryFI

Kemia

37
0
0
0
0
0

CC0 Umma Wote

Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.

Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.

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