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    Discussion in 'SolidWorks' started by gchiham, Aug 3, 2015.

    1. gchiham

      gchiham New Member

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      I would like to know a bit more info on this.
      About how much will it cost to make a mould from the attach item.
      Item: Bucket to hold water.
      Size 10x9x11 inches
      Weight: 400g
      Item holds 3 gallons

      What are cavities ? and how many does this item have ?

      I will appreciate if you can give me a small help.





      [​IMG][​IMG][​IMG][/URL][/IMG]
       
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    3. CPPMable

      CPPMable Well-Known Member

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      Do you want to setup a plastic injection mold? Or what type of mold? How many pieces do you want to make? How long do you want your mold to last?
       
    4. gchiham

      gchiham New Member

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      Yes the mold is going to be for plastic injection.
      How many pcs less than 5k
      Last for 2 years
       
    5. Mr White

      Mr White New Member

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      I can tell you right now that for this you would be better of with either vacuum forming or rotational moulding. This is as the design is not complex so a part can be produced with good accuracy by these methods whilst avoiding the higher tooling cost of injection moulding. But I have to ask is the lead time an important thing to you? (this may ultimately influence your manufacturing method)


      Anyway to answer the cost part of your question it may initially coast £168 and it will taper down from here.


      How I got to this (assumptions in mind btw so don't take this as rule of law): I used part of the 1 3 9 rule and ABS (on average £0.52/Kg) as a material of choice as it is a common plastic. which gave a material cost of £0.34 just based on an approximation of weight the dimensions of your bucket give. Assuming labour cost is £7/hr over an 8 hour period and this is the only intrinsic cost to manufacturing this gives £168. So total £168.34.


      **Top tip if you are savy with CAD you can upload a design to Protomold and they will give you a full quote for injection moulding. Waaay more reliable and accurate than the 1 3 9 rule for estimating cost**
       
    6. Mr White

      Mr White New Member

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      I can tell you right now that for this you would be better of with either vacuum forming or rotational moulding. This is as the design is not complex so a part can be produced with good accuracy by these methods whilst avoiding the higher tooling cost of injection moulding. But I have to ask is the lead time an important thing to you? (this may ultimately influence your manufacturing method)




      Anyway to answer the cost part of your question it may initially coast £168 and it will taper down from here.




      How I got to this (assumptions in mind btw so don't take this as rule of law): I used part of the 1 3 9 rule and ABS (on average £0.52/Kg) as a material of choice as it is a common plastic. which gave a material cost of £0.34 just based on an approximation of weight the dimensions of your bucket give. Assuming labour cost is £7/hr over an 8 hour period and this is the only intrinsic cost to manufacturing this gives £168. So total £168.34.




      **Top tip if you are savy with CAD you can upload a design to Protomold and they will give you a full quote for injection moulding. Waaay more reliable and accurate than the 1 3 9 rule for estimating cost**
       
    7. gchiham

      gchiham New Member

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      Thank you for the TIP.
      You say a company will charge me around $270 to make the mold and producing each piece will be around $0.80 a piece ?

      Mr White
      I am trying to bring down the cost of this product which is the best technique to produce 1,000 pieces ? Injection mold ?
      And lead time is not important, what is important is to keep prices down. :p
       
    8. Mr White

      Mr White New Member

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      The figures I have given you are not too far fetched, albeit tooling (making the mould) could be in the thousands to be honest. I would seriously consider getting a direct quote though from a company like Protomold. The 1 3 9 rule is an estimate and to be honest not a very good one. What I have given you is a baseline idea. I hope that clears things up.

      PS look into rotational moulding or vacuum forming if lead time is not a factor.
       
    9. nina

      nina Member

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      Would you mind surface finish? generally injection mold process will have good preformance , vacumm and rotational is hard to control surface finish and also tolerance is also hard control .

      As your provide size 1 cavity is enough because it is not a small parts , too many cavities which will be increase mould cost .
       
    10. nina

      nina Member

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      reply to gchiham (info on creating a mould )

      Would you mind surface finish? generally injection mold process will have good preformance , vacumm and rotational is hard to control surface finish and also tolerance is also hard control .

      As your provide size 1 cavity is enough because it is not a small parts , too many cavities which will be increase mould cost .
       
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