Information Injection machine

Share here all your information, suggestions inspiration for a extrusion machine. The more information we gather the better the machine will get.

I really like the possibilities of this machine, but was wondering if we could improve the lever mechanism with some similar to this? The idea being that we utilise the benefits of leverage. If you created a product that has a high demand it would make sense to make the machine as easy and efficient to operate as possible.

What do you think?

image from:

here a nice explanation about injection combined extrusion

how much harder is to make it semi automatic injection system with a pump and just atach it to the extrusion machine?


In the blueprint section the following text doesn’t belong to the injection section on page 4:

The press.

The screw inside is the most important thing. I found an old one, you can also use an old drill or make one on the lathe. The press is made of brass, this is not a necessity.


cut- to turn the screw inside -cut


Use the attached 3D model for all measurements. > There is no file?

Regards, Boy


why should you combine a linear hydraulic movement with a srew? They are both going in the same direction and you don’t want that displacement for the screw…

i think iam going to try this idea
What do you think about it ?
it will work ?

see the attachment

Excuse me because I do not know English well

Hello Dave,

I thing i can help you in your project.
I’m experienced freelance product, mechanical designer and project manager in Belgium(Namur area).
I own Solidworks prenium license and powerful mobile workstation for design.
I have a university degree level in plastic, composite materials and industrial design including mold and tooling.

Don’t hesite to contact me for any questions.


Pie Olivier. A

Hoi Dave,
I would like to talk about your project. I am not that engineer but i can
contribute if you like.
Maybe with my experiences as a designer, modelmaker i can help or support.
Like to hear from you.

Alfred Valk
Instructor Plastics

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There are hydraulic workshop presses in a very simple construction:
They are made just by a steelframe and a hydraulic car-jack in different performance categorys. Maybe there could be a motor at the side to close and open the mould faster. But I think this is the worldwide most accessible and powerful construction. Usually you can get them from nearby scrapyards for some bucks or for free.

Additional you can use them for metal bending or for pressing form-wood, inserting press-fittings etc.

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Great, thanks for helping!

No I haven’t. I dont have any engineering experience, just a tinkerer. My friend and I have started, and really interested in these machines to create employment opportunities for our neighbours.

Jsut looking for ways to contribute back to the Open Source movement, also looking for someone in Auckland, New Zealand who can help us fabricate these machines.

The leverage could definitely be improved. Yours seems like a good alternative, more efficient solution. Have you ever worked with it? Does it work properly?