difficulty_level: "Easy"
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time: "< 1 hour"
category:
  label: "Moulds"
  _created: "2022-05-09T21:18:16.628Z"
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creatorCountry: "cz"
_created: "2021-08-15T12:25:45.811Z"
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comments:
  - _id: "hPH8EAOwD5OjNGASp9Db"
    text: "haha that injector! Nice work"
    _created: "2021-08-15T13:37:30.293Z"
    creatorCountry: "pt"
    creatorName: "precious-plastic"
    _creatorId: "precious-plastic"
  - text: "Nice how-to! Thanks for sharing! Would be possible to reduce the melting time to increase the production/time rate?"
    _creatorId: "fair-enough"
    creatorCountry: "es"
    _id: "PKKO14dWidHahNcg9O08"
    creatorName: "fair-enough"
    _created: "2021-10-20T20:42:24.488Z"
tags:
  - "product"
  - "mould"
  - "injection"
description: "Make plastic recycled medals to boost promotion of methods how to post-process plastic waste. In this how to you can find blueprints for very simple injection mould and I describe manufacturing process. Average cycle time approx. 4,5min. / medal."
_id: "9RArePVGeUFQvC7z9p5y"
files:
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slug: "plastic-medals-incl-mould-design"
_modified: "2023-08-14T11:07:02.285Z"
id: "9RArePVGeUFQvC7z9p5y"
fileLink: ""
steps:
  - title: "1. What do you need? "
    _animationKey: "unique1"
    text: "- shredded plastic, I recommend to use PP or HDPE\n- injection mould - you can download blueprints for free\n- injection machine developed by Precious Plastic "
    images: []
    videoUrl: "https://www.youtube.com/watch?v=mGL1QOCip78"
  - text: "For 4 medals you need 100g of PP or HDPE.\nSelect colour as you want.\nShread it into small pieces which you can get into cylinder of injection machine."
    title: "Prepare material"
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  - title: "Prepare injection mould"
    _animationKey: "unique3"
    text: "Mould is very simple. \n\nIt consists of 4 parts:\n- connector is made from machined aluminium (same design as for dome joints) \n- top plate, middle plate and bottom plate were laser cutted\n- you can also add engraving to make lables on every medal as you want. \n\nWe made laser engraving in depth of 0,3mm. \n\nMiddle part and bottom part are connected with bolts. \n\nTo make holes in plastic part I finally used a bolt M6 which I screw inside for every medal before every injection. \n"
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        timeCreated: "2021-08-15T12:25:40.101Z"
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        contentType: "image/jpeg"
  - text: "Temperature setting depends on type of plastic. \nFor HDPE I used 260 deg. C\nMelting time 18 min. (depends on size of shredded particles)\nAfter injection leave mould for 2 min closed. \nRemove medals and cut edges. \n\nIn video or picture below you can see it was difficult to press it. I used material from oil bottles which was difficult to inject. :D\n#floorislava"
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    title: "Injection moulding"
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    title: "Make people happy"
    text: "The medal itself has little effect on the overall solution of the planet's plastic pollution. But if you understand it correctly, for example, as part of an event for the public, you can teach people the real use of plastics for new things. In this case, even a small medal can serve as an interesting gift and motivate people to reduce plastic consumption. During Olympic Festival in Prague we made more than 1000 plastic medals :)\n\n+ easy to make\n+ interesting for public \n+ you can use medal also as coaster or attach it to keys\n- stiffness of mould is not very good => if you apply more force plastic can flow out easily and you need cut more plastic.\n\nGet in touch: https://linktr.ee/plastmakers"
_contentModifiedTimestamp: "2023-06-14T11:02:15.830Z"
total_views: 92
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title: "Plastic medals (incl. mould design)"
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