Plastic injection machine, Precious Plastic
Project data
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Category: Plastic production URL (first publication): https://community.preciousplastic.com/academy/build/injection License: CC BY-NC-SA 4.0 Organization: Precious Plastic Project status: Active Certification status: In process
Maturity of the project: production / full product
Contains PDF-drawings: Yes CAD files are editable: Yes Bill of materials is published: Yes
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Project details
Description
In order to develop a homemade machine, capable of making parts by injection of recycled plastic, this project is presented, developed by the Precious Plastic organization (P.P.), where a device is manufactured from reused iron parts and some electrical components, efficient for this purpose. Details of the original development are on the P.P. website.
Technical data
Some features of the machine:
- Type: Injection
- Version: 1.0
- Weight: 23 kg
- Dimensions: 830 x 700 x 1300 mm
- Barrel volume: 150 cm³
- Leverage: 3
- Injection pressure: 45 bars
- Max mould size: 360 x 330 mm
- Injections p/h: 10 - 30
- Voltage: 220V
- AMP: 2.6A
- Input Flake Size: Medium, Small
- Temperature control: PID Controller, Solid State Relay and Thermocouple
- Processed material: HDPE, LDPE, PP, PS
- Output: 10-30 injections per hour depending on mould
Technical documentation
Plastic injection machine - CAD-files
Plastic injection machine - bill of materials
Other technical notes
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Tips & tricks while making
- Take care welding around the hopper tabs. The heat can easily distort the barrel, ruining that perfect slide.
- Adding an insulated barrel cover will increase efficiency and reduce the chances of the user accidentally touching the barrel when hot.
- When building, the lever is stronger as a circular profile when compared to a square profile. Which will reduce the likelihood of bending it.
Assembly instructions
Here are some plans with the assembly sets and pieces, which can be detailed at this link
Zoom in
Zoom out
Tests, practical applications
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It can be seen that the machine can produce injected parts from recycled plastic, see this point in the video.
+ General Reviews 
Reviews
| Pos. | Qty. | Part Name | Part code | Part Type | Specifications | Review Status | Show All Comments | |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | Framework | |
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| 1.1 | 2 | Tube 30x30x3 | 1 | Steel, L.800 | |
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| 1.2 | 1 | Tube 30x30x3 | 2 | Steel, L.830 | |
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| 1.3 | 2 | Tube 30x30x3 (4) | 3 | Steel, L=210 | |
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| 1.4 | 3 | Flat 30x4 (2) | 4 | Steel, L=65 | |
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| 1.5 | 1 | Tube 30x30x3 (2) | 5 | Steel, L=183 | |
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| 1.6 | 1 | Tube 30x30x3 (5) | 6 | Steel, L=188 | |
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| 1.7 | 1 | Angle 30x30x3 | 7 | Steel, L=160 | |
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| 1.8 | 1 | Tube 30x30x3 (3) | 8 | Steel, L=850 | |
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| 1.9 | 1 | Tube30x30x3 | 9 | Steel, L=720 | |
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| 1.10 | 1 | Framework Wooden base | Wood, 18mm | |
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| 1.11 | 1 | Framework Pullrod 2X | |
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| 1.12 | 1 | Framework Plunger | |
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| 2 | 1 | Framework Lever | |
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| 2.1 | 2 | Flat 30x4(1) | 1 | Steel, L.70 | |
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| 2.2 | 1 | Tube 30x30x3 (1) | 2 | Steel, L.1100 | |
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| 3 | 1 | Hopper | |
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| 3.1 | 2 | 20x3 | 1 | Steel, L. 90 | |
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| 3.2 | 2 | Side | 2 | Steel, 1mm | |
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| 3.3 | 1 | Bottom | 3 | Steel, 1mm | |
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| 3.4 | 1 | Front | 4 | Steel, 1mm | |
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| 4 | 1 | Barrel | |
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| 4.1 | 1 | Tube 34x26 | 1 | Steel, L=530 | |
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| 4.4 | 2 | Flat 30x4 | 4 | Steel, L=120 | |
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| 5 | 1 | Eletronic Assembly | |
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| 5.2 | 1 | Cover | 2 | Steel, Sheet 150x200x2mm | |
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| 5.4 | 1 | Rear | 4 | Steel, 150x200x2mm | |
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| 5.5 | 1 | Side | 5 | Steel, 200x200x2mm | |
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| 5.6 | 1 | Top | 6 | Steel, 150x200x2mm | |
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| 5.7 | 4 | Bracket | 7 | Steel, Flat 30x3 -45' | |
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| 5.8 | 1 | Side (2) | 8 | Steel, 200x200x2mm | |
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| 5.9 | 1 | Bottom | g | Steel, 150x200x2mm | |
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| 6 | 1 | Electronic sheets | |
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| 6.1 | 1 | Rear(1) | 1 | Steel, 150x200x2mm | |
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| 6.2 | 1 | Side (3) | 2 | Steel, 200x200x2mm | |
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| 6.3 | 1 | Cover (1) | 3 | Steel, Sheet 150x200x2mm | |
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| 6.4 | 1 | Bracket (1) | 4 | Steel, Flat 30x3-45' | |
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| 6.5 | 1 | Bottom (2) | 5 | Steel, 150x200x2mm | |
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| 7 | 1 | Electronics | |
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| 7.1 | 2 | PID Controller | 0-400 Degree | |
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| 7.2 | 2 | SSR | 2-24 V | |
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| 7.3 | 2 | Thermocouple | Type K | |
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| 7.4 | 4 | Bandheater | metal, 35x45MM | |
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| 7.5 | 1 | Power switch | 220V | |
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| 7.6 | 1 | Led indicator | 220V | |
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| 7.7 | 5m | Powercord | 30x30x3mm | |
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