fab

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-# 3d-print-dat.md

-

-- [[3d-print]]

-

-

-## tech

-

-- [[Lithophane-dat]]

-

-## features

-

-- placement

-

-

-

-## common 3d printer websites

-

-

-- [Printables.com](https://www.printables.com)

-- [Thingiverse](https://www.thingiverse.com)

-- [MakerWorld](https://makerworld.com)

-- [Cults 3D](https://cults3d.com)

-

-- https://thangs.com/?sort=trending

-

-

-## good projects by 3D print

-

-- [[rover-dat]]

-

-

-## drone claw

-

-

-## common errors

-

-- 存在多壳体结构

-- 存在反向三角面

-- 存在坏边

-- 不存在孔洞缺陷

-- 不存在薄壁结构

-

-

-

-

-## ref

-

-- [[3d-print]]

-

-# 3d-print-service-dat

-

-Supported 3D formats: stl/stp/step/obj/3mf.

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-You can upload up to 20 files at a time, with each file size less than 100MB.

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-For full-color printing, compressed files in rar/zip format can be uploaded.

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-Note: To ensure more accurate printing and avoid unnecessary disputes, it is strongly recommended to upload STL format files!

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-Special reminder: Wall thickness should be greater than 1.2mm, with the thinnest part not less than 0.8mm.

-

-

-

-

-## extra

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-### embedded nuts

-

-

-- [[fab-3d-print-materials-dat]]

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-## ref

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-- [[3d-print-service]] - [[3d-print]]

-

-# PLA-dat

-

-

-

-# fab-3d-print-materials-dat

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-- [[PLA-dat]] - [[PETG-dat]] - [[ABS-dat]] - [[mylon-dat]] - [[TPU-dat]]

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-

-

-

-

-# Common 3D Printing Materials — Comparison Table (with Cost)

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-| Feature | PLA | ABS | PETG | TPU | Nylon |

-|---------|-----|-----|------|-----|-------|

-| **Full Name** | Polylactic Acid | Acrylonitrile Butadiene Styrene | Polyethylene Terephthalate Glycol | Thermoplastic Polyurethane | Polyamide |

-| **Printing Temp** | 180–220°C | 220–250°C | 230–250°C | 210–230°C | 240–260°C |

-| **Bed Temp** | 20–60°C | 90–110°C | 70–90°C | 20–60°C | 70–100°C |

-| **Ease of Printing** | Very easy | Moderate | Moderate | Hard | Hard |

-| **Warping** | Low | High | Moderate | Low | High |

-| **Flexibility** | Low | Low | Medium | Very high | Medium |

-| **Strength** | Medium | High | High | Medium | High |

-| **Heat Resistance** | Low (~60°C) | High (~100°C) | Medium (~80°C) | Low (~60°C) | High (~100°C) |

-| **Durability** | Medium | High | High | Medium | High |

-| **Odor** | Low | Strong | Low | Low | Low |

-| **Cost (per kg)** | Low (~$20–30) | Low (~$20–35) | Medium (~$25–40) | Medium–High (~$30–50) | High (~$40–70) |

-| **Common Uses** | Prototypes, figurines, educational | Functional parts, enclosures | Mechanical parts, functional items | Flexible parts, gaskets | Functional parts, mechanical components |

-| **Notes** | Biodegradable, beginner-friendly | Can warp, fumes, requires ventilated enclosure | Tough, chemical resistant, less brittle | Very flexible, elastic, harder to print | Strong, abrasion-resistant, requires drying |

-

-

-

-## material

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-### 9600

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-适用范围: 适用于管道，卡扣，电子产品外壳，汽车壳体，仪表盘组件等。

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-优点: 颜色更白，样件纹路佳，表面光滑，韧性、耐用性强，机械性能好。

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-缺点: 不适宜放置高温及强太阳光环境。

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-成型工艺: SLA立体光固化

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-材料精度: ±0.2mm或0.3%以内

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-颜色: 哑光白

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-热变形温度: 59°C

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-

-

-

-

-## ref

-

-- [[3d-print-dat]]

-

-# injection-molding-dat

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-- [[plastic-dat]]

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-- 塑料柱

-- 加强筋

-- 加强柱 == boss

-- 一体成型

-# Small-batch Molding Options

-

-A concise guide to three common small-batch molding approaches. Use the table below for a quick comparison, then read the recommended workflows and pros/cons for each option.

-

-| Option | Method | Ideal quantity | Mold cost (¥) | Unit cost (¥) | Summary |

-| ------ | ----------------------------------------- | -------------------------: | --------------------------: | -----------------------: | ----------------------------------------------------- |

-| 1 | Silicone mold + resin casting | 10–300 | 300–800 | 5–20 | Golden option — recommended for most small runs |

-| 2 | Aluminum mould / Simple injection mould | Very simple parts only | 1,500–3,000 | 1–3 | Cost-effective per unit if design is extremely simple |

-| 3 | 3D‑printed mould + injection / heat-press | Prototyping / experimental | Varies (material & printer) | Very low (material only) | Low-cost experiments, not for stable production |

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-## Option 1 — Silicone Mold + Resin Casting (Strongly recommended)

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-Best for 10–300 pieces. Balanced cost, surface finish and ease of use.

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-Costs (typical)

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-- Silicone mold: ¥300–800

-- Resin part (per piece): ¥5–20

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-Example: 100 pieces (assume mold ¥600, resin ¥10 each)

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-- Average unit cost = (600 + 100×10) / 100 = ¥16 per piece

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-Advantages

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-- Low mold cost

-- Failed casts are repairable

-- Good surface finish

-- Master can be 3D printed (save tooling time)

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-Limitations

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-- Parts are not as strong as injection molded items

-- Slightly worse dimensional stability compared to injection molding

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-Tips

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-- Use a high-quality silicone (shore hardness chosen by demoulding requirements).

-- Post-cure resin parts if required for strength/stability.

-- Consider vacuum degassing when pouring resin to reduce bubbles.

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-## Option 2 — Aluminum Mold / Simple Injection Mold (Grey area)

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-Suitable only for very simple geometries: single cavity, no undercuts, no fine ribs.

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-Costs (typical)

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-- Mold: ¥1,500–3,000

-- Unit: ¥1–3 (material + simple press running)

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-When it makes sense

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-- If the part geometry is extremely simple and you need many pieces (or need higher strength/dimensional stability).

-- Note: hidden costs include setup, machining tolerances, and possible rework of the mold.

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-Limitations

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-- Not suitable for complex parts (no undercuts, no deep ribs, no thin cores)

-- Higher upfront cost and lead time than silicone molds

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-## Option 3 — 3D-Printed Mold + Injection / Heat-press (Advanced / Experimental)

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-Workflow

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-- Print the mold in a high‑temperature resin (or otherwise suitable material).

-- Use low-melting-point plastics (or hot melt adhesives) to form parts.

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-Suitable for

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-- Rapid experiments, proof-of-concept, or extremely low-cost runs.

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-Limitations

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-- Mold lifetime and dimensional stability are limited by print resin and layer strength.

-- Not recommended for stable, repeatable production runs.

-

-## Recommendation Summary

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-- Use Option 1 (silicone + resin) for most small-batch needs (10–300 pcs): lowest risk, good finish, flexible.

-- Consider Option 2 only when the part is extremely simple and unit cost must be minimized for larger quantities.

-- Use Option 3 only for prototyping and experimental workflows where low cost and speed matter more than long-term stability.

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-## Quick checklist before choosing

-

-- Quantity required

-- Geometric complexity (undercuts, thin ribs, threads)

-- Required mechanical strength

-- Dimensional tolerance and stability

-- Surface finish requirements

-- Budget and lead time

-# fab-mech-dat.md

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-- [[3d-print-dat]] - [[3d-prototype-dat]]

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-

-

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-## fab-mech

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-- [[fab-sheet-metal-dat]]

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-## small scale and prototype preparation

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-- [[fab-drilling-dat]]

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-

-

-

-

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-## fab mech compare

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-### CNC Aluminium (per piece pricing)

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-| QTY | unit price (¥) | total (¥) |

-| ---: | -------------: | --------: |

-| 1 | 54.86 | 54.86 |

-| 2 | 47.32 | 94.64 |

-| 5 | 41.40 | 207.00 |

-| 10 | 35.84 | 358.40 |

-| 20 | 32.05 | 641.00 |

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-### CNC ABS (per piece pricing)

-

-- [[abs-dat]] - [[plastic-dat]]

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-| QTY | unit price (¥) | total (¥) |

-| ---: | -------------: | --------: |

-| 1 | 41.75 | 41.75 |

-| 2 | 34.43 | 68.86 |

-| 5 | 29.73 | 148.65 |

-| 10 | 24.33 | 243.30 |

-| 20 | 19.72 | 394.40 |

-

-### 3D Printing

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-- Typical price: ¥14.84 per part (example figure)

-

-

-

-## ref

-

-- [[fab-dat]]

-

-# fab-drilling-dat.md

-

-- make the **master pattern** for drilling

-

-

-

-

-## ref

-

-- [[fab-drilling]] - [[fab]] - [[fab-mech]]

-# Sheet Metal Fabrication Data

-

-- Supported 3D (required) formats: .step, .stp; Supported 2D formats: dwg, dxf, pdf; Compressed packages (zip, rar) can be uploaded directly.

-- Supports unified ordering for multiple parts in a compressed package; file names for 2D files, BOM lists, etc., need to be consistent (number of files per upload 20, individual file size <100M).

-- If there are assembly relationships between parts, it is strongly recommended that you upload an assembly STEP file.

-

-Sheet Metal Fabrication typically refers to cold working processes on metal sheets, mainly including the following major categories ??

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-## 1. Cutting / Blanking

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-Cut the sheet to size for blanks

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-- Shearing

-- Laser cutting

-- CNC punching / Turret punch

-- Plasma cutting

-- Waterjet cutting

-- Saw cutting

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-## 2. Stamping / Punching

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-Forming locally or entirely through molds

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-- Punching

-- Blanking

-- Trimming

-- Flanging / Extrusion

-- Deep drawing

-- Embossing / Beading

-- Forming stamping

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-## 3. Bending / Forming

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-Change the angle or shape of the sheet

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-- Press brake bending

-- Air bending / Bottoming / Coining

-- Roll bending

-- Hemming

-- Curling

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-## 4. Forming

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-Change the overall or local shape of the sheet

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-- Deep drawing

-- Hydroforming

-- Flanging

-- Necking / Expanding

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-## 5. Joining

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-Combine multiple sheet metal parts

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-- Spot welding

-- TIG / MIG welding

-- Riveting

-- Blind rivet

-- Screw fastening

-- PEM fasteners

-- Clinching

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-## 6. Surface Treatment

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-Improve appearance, corrosion resistance, or functionality

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-- Powder coating

-- Painting

-- Plating

-- Anodizing (aluminum)

-- Brushing

-- Polishing

-- Black oxide

-- Passivation

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-## 7. Finishing

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-Improve dimensional and assembly quality

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-- Deburring

-- Chamfering

-- Leveling

-- Tapping

-- Reaming / Countersinking

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-## 8. Common Materials (Sheet Metal)

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-- Cold rolled steel (SPCC)

-- Galvanized sheet (GI / SECC)

-- Stainless steel (304 / 316)

-- Aluminum sheet (5052 / 6061)

-- Copper / Brass

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-## 9. One-sentence Summary

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-Sheet Metal Fabrication = Cutting Stamping Bending Forming Joining Surface Treatment Finishing

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-## Examples Stainless Steel 201

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-- The following bending rack price == 20RM == 3 USD

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-

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-## Example Plastic PP PE Sheet

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-unit == mm, color == black

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-## ref

-

-- [[CAD-dat]] - [[AI]]