105 lines
5.4 KiB
Markdown
105 lines
5.4 KiB
Markdown
---
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title: Faceshield with extrusion die and A4 clear sheet
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slug: faceshield-with-extrusion-die-and-a4-clear-sheet
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description: We make a face shield from basic elements and the extrusion machine. Face shields are critically lacking in many countries affected by COVID-19. You need up to 22 per patient. We need a DIY way of making these and making these fast..
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Remember face shields are only a complement to googles and masks and are meant to reduce the viral charge.
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tags: ["HDPE","extrusion"]
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category: Products
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difficulty: Medium
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time: < 1 week
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keywords:
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location: Wick, United Kingdom of Great Britain and Northern Ireland (the)
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---
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# Faceshield with extrusion die and A4 clear sheet
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We make a face shield from basic elements and the extrusion machine. Face shields are critically lacking in many countries affected by COVID-19. You need up to 22 per patient. We need a DIY way of making these and making these fast..
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Remember face shields are only a complement to googles and masks and are meant to reduce the viral charge.
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User Location: Wick, United Kingdom of Great Britain and Northern Ireland (the)
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## Steps
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### Step 1: Make a nozzle to attach to the extruder.
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The nozzle needs to have a relatively large entry and a tapering end.
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The best is to have some bars to cool down a bit the plastic and funnel it towards the exit.
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To activate the nozzle we heat it up with hot air gun
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The outside plates are only 1mm apart
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You can also do it without nozzle but it is even more complicated to control the thickness and elasticity of the future band
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<a class="text-orange-600 underline" href="https://www.youtube.com/watch?v=BTiQqPFE9vs" target="_blank" rel="noopener noreferrer">youtube.com: youtube.com/watch?v=BTiQqPFE9vs</a>
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### Step 2: Extrude the stripe
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This is a delicate part and needs improvement as you need to pull the plastic out so that the thickness and flow is even. Make your motor rotate at the slowest speed possible.
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Because of changes in the thickness and rate of cooling your stripe might twist
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We heat it up back with the hot air gun and pass it inside our metal mangle. This will straighten the band. Don#t expect miracles, you will keep the concave shape. Although in the end it makes no difference with our design
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Based on the work on the Badger shield
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<a class="text-orange-600 underline" href="https://www.delve.com/assets/documents/OPEN-SOURCE-FACE-SHIELD-DRAWING-v1.PDF" target="_blank" rel="noopener noreferrer">delve.com: delve.com/assets/documents/OPEN-SOURCE-FACE-SHIELD-DRAWING-v1.PDF</a>
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We can see that ideally the contact with the head should be 13"/ 33 cm. Cut to length
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Here we have used HDPE from ocean plastic we regularly recover on the local beaches. We recommend HDPE as it is easier to source and also low temperature to melt.
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### Step 3: Punch holes for the attachment
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The best for the attachment is an elastic band for clothes but we didn't have any so made with a rope like in the example of <a class="text-orange-600 underline" href="https://menorplastic.com/tutorial-para-fabricarte-tu-protector-facial-casero/" target="_blank" rel="noopener noreferrer">menorplastic.com: menorplastic.com/tutorial-para-fabricarte-tu-protector-facial-casero</a>
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however to avoid making knots and for an easy attachment you can simply punch a set of holes
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A square wood chisel size 10 is perfect for that.
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You have to make 3 sets of 2 holes and one set of 3 holes at one end (could be two if you use rope)
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### Step 4: lace the plastic band
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Follow the right order for comfort, according to drawing
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The 2-hole design allows to tighten at any size of head quickly.
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The third hole design is to pass the elastic band in a very secure latch.
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You can also make a similar knot as in the third figure for easier adjustment.
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### Step 5: Staple the screen
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Try to center the screen with your attachment then staple from one end.
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3 staples suffice one on each end and one in the middle, going progressively from one side to the other.
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Keep the staples open until the screen is really tight on the plastic stripe you extruded. You can repunch the screen to tighten if needed.
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The plastic sheets can be sourced from overhead or like here from a lamination machine where we stuck two ends together.
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The shield is only to be used in extreme cases where no other alternatives are possible. However it takes on most of the designs of approved PPE with a minimum of resource
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You can get more details and updates if you follow this link. We cannot update both websites at the same times at the moment. Sorry for the inconvenience
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<a class="text-orange-600 underline" href="https://www.plasticatbay.org/2020/03/29/plasticbay-faceshield-design" target="_blank" rel="noopener noreferrer">plasticatbay.org: plasticatbay.org/2020/03/29/plasticbay-faceshield-design</a>
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## Resources
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## References |