diff --git a/README.md b/README.md index 5016bdb8fc413ca956675e202059512a13f74779..23d09219d63b0e5556520ba861fb7e7d296fdd59 100644 --- a/README.md +++ b/README.md @@ -12,7 +12,56 @@ The section to extrude is composed by a central circular section, in this case o  +In order to achieve the stiffnes needed in the main beam and the softness needed in the exterior hairs, iterations with geometry and material proposed can be done. ## Materials -Looking for [medical-grade plastics](https://www.raumedic.com/medical-technology/medical-grade-plastics) has been a tricky thing. Not every approval plastic has the same range and looking for which material is accepted to be inserted in mouth and nose has been a rabbit hole. The most successful output Ive got here has been research which material uses a conventional medical use NP swab. Most of them are Nylon +Looking for [medical-grade plastics](https://www.raumedic.com/medical-technology/medical-grade-plastics) has been a tricky thing. Not every approval plastic has the same range and looking for which material is accepted to be inserted in mouth and nose has been a rabbit hole. The most successful output Ive got here has been research which material uses a conventional medical use NP swab. Most of them are Nylon, Polyester (PET). If someone can help me here it would be nice to have some orientation. + +The most interesting one would be the one with the lowing melting temperature, at least to start with the mock-up. + +## Machine + +Based on any conventional plastic extruder machine + + + +It is wanted to change: + + 1. Modify the extrusion part. + +This piece can be done with the EDM. The length of it can be iterated to ensure that the attempt shape has enough transition length to adapt to the final complex cross section. + + + + + + + + + + + +It will be attached to a conventional screw feeder. + + + +To find this item from a provider inside the US is being as well a tricky part. + +The design can adapt in function of the available outer diameter part. The proposed design is 10mm. + +The feed shaft would be attached to a stepper. + +I think the most ideal position of this extrusion to not be affected by gravity is to put it vertically. An adaptor to feed pellet is also needed. + + + +The intermediate box represent the space to install the shaft adaptor between the motor and the feeder and the possible leakage system. + +A closed loop heating system is needed in the exterior of the shaft, the green element. + +## Parts + +TBD, have a call with Sam asking about his zipping extruder. + +# WIP