Introduction: Filament Injector for 3D Printing

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Injection machinery is used to manufacture different types of products

effectively by direct injection of the plastic to form the product.

Among the products that can be manufactured with injection machinery are containers, plastic bottles, tapers, household utensils, caps and any plastic object.

Our objective for the construction of this injector is to manufacture filament for 3d printer since the filament for 3D printing in Peru is very expensive.






-Reduce motor

-Resistors (heaters)


-Solid state relays


- Cables (jumpers)

Step 1: Hopper

Project outline and functioning

The operation of the filament extruder is not very complex after

have taken into account the formulas for heating the type of plastic, volume, etc.

It would only remain to know what each component of the injector is for

-Hopper: is the funnel where the crushed or cut plastic is deposited

in my case I use the spout of a bottle of Incakola that can be removed

when the temperature required to inject the plastic is very high.

Step 2: Husillo

It is in charge of transporting and crushing the plastic through the hot steel tube so that it then comes out through the nozzle. In my case, I use a twist drill.

I recommend that you buy it there express because finding one can be somewhat tedious

Step 3: Gear Motor

es el encargado de generar la energía
mecánica suficiente para la rotación de la broca. los puedes encontrar en Paruro en pequeñas dimensiones de torque o en jr.carcamo a puedes encontrar de torque industrial

Step 4: Coupling

The flexible coupling is used to give a margin of flexibility between the moto-reducto and the bit so that it does not have much rigidity and if there is any margin of error (there are no breaks)

Step 5: Arduino

electronic board in charge of the control

of temperature and the on and off of the reducer motor and resistors.

Step 6: Solid State Relay

in charge of regulating the input voltage in the resistance and in the control of the reducer motor.In this case we put a solid state relay

Step 7: