El Tornillo Motor Injection Machine

Machine Design:
Motor Injection Machine

Machine Size:
Height: 76.77 inches (195 cm); Width: 19.69 inches (50 cm); Depth: 19.69 inches (50 cm)

Machine Cost:
In Colombia, Bill of Material: COP $4,700,000

Features:
Equipped with a motor for pressure application, improving upon older hand-lever models.

Compatibility:
Suitable for injection molds.

Compatible Plastic Types:
PP, HDPE, LDPE, PS

To build this machine, you will need:

• Turning (machining on a lathe)
• Milling (machining on a mill)
• General metalworking (cutting, drilling)
• Welding
• Advanced assembly work (requires specific tools, measurement instruments, and knowledge of tolerances for alignment and assembly)
• General electrical work (wiring safety switches, temperature controllers)
• Motor electrical work (wiring motors, contactors, overload protection)

Watch this video for instructions on building the machine:

0:00 Introduction 3:09 Motor Injection Machine Overview 3:36 Chapter I: Frame Construction 7:12 Chapter II: Mould Area Assembly 8:25 Chapter III: Piston System Installation 14:39 Chapter IV: Heating Barrel Setup 17:51 Chapter V: Electrical Wiring 18:56 Chapter VI: Motor Connection 20:10 Chapter VII: Final Assembly

How to Operate the Machine

1. Activate the machine and load the barrel with plastic.
2. For the initial injection, allow 25 minutes after activation and loading.
3. Position the mold on the jack surface and press it firmly against the nozzle.
4. Engage the motor to lower the piston, forcing the molten plastic into the mold until the belt slips in the pulley.
5. Deactivate the motor and maintain piston pressure for approximately 5 seconds.
6. Reverse the motor to raise the piston.
7. For continuous use, refill the barrel before detaching the mold from the nozzle.
8. Lower the jack to remove the mold.
9. Open the mold and extract the molded part.
10. Close the mold and repeat the process from step 3.

Recommendations

Molds must feature a conical nozzle connection or require an adapter. The machine generates significant pressure, allowing for the injection of items with thin walls.

This guide outlines the process for constructing a Motor Injection Machine.

For those unable to replicate the machine or interested in purchasing other machines or molds, please visit my shop.