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  • Tips for reducing injection mould part cost/mould cost

    Discussion in 'Plastic moulding' started by oemodm, Sep 19, 2016.

    1. oemodm

      oemodm Active Member

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      Hi everyone,

      Looking for tips on the reduction of injection mould tooling cost, and part cost. I've listed my current methods below, however my main curiosity is:

      >>>>>>>>>>>>>>>
      If I've 4 small parts, for example, is it cheaper to join in CAD into one part, and mould as one part? (please ignore post production automatic cutting process costs).
      >>>>>>>>>>>>>>>

      Current methods of reducing injection mould and part cost:

      - Focus on symmetrical part design (moulding 1 part in double quantities)
      - Harmonize part depths, to match, on 1 mould tool blank
      - Multi functional parts
      - Use mould keys, for selective injection of parts, saving on multiple mould tools

      >>>>>>>>>>>>>>>>>>>
      Also interested in lists/resources to other cost reduction methods, for part and mould cost
      >>>>>>>>>>>>>>>>>>>

      thanks / simon
       
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    3. Hongzhun Technology

      Hongzhun Technology New Member

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      Plastic injection molding is a very cost-effective. Even so, there are a number of things you can do to save even more money on a project without sacrificing anything in the finished product.
      Use designs that minimize materials.
      Use materials that meet your needs.
      Modify and reuse molds.
      Choose the right shop.
      For more information click here Mould Components.
       
    4. Ravi Rs.M

      Ravi Rs.M New Member

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      Hi!
      While considering cost & material details, reducing the no. of mold will achieve the low cost in overall production. For example; while your design contains two different parts with same material & weight, try to allocate them in a single family mold. so that you may reduce the no. of mold on whole design.

      Re-consider/re-check your product design, regarding appearance level; to modify gates & side core concepts to minimum level & simple concepts.

      Re-consider/re-check your production requirement to finalize no. of cavities in all molds.

      Try to get mold bolster as standard one.

      Thanks.
       
    5. stevenchengcn

      stevenchengcn New Member

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      The cost of injection molding parts is related to many factors, but mainly to the following:

      • The raw materials cost. The cost could be calculated easily, just ask suppliers of raw materials for the price. After the injection molding parts plus its loss (about 3%) multiplied by the price of raw materials, the cost of raw materials can be obtained;
      • Injection molding cost. You should know the processing cost per hour of the different injection molding machines. Assuming: The processing cost of 100 tons plastic injection molding machine is USD 30.00 / hour, so the processing cost per minute to 0.5 USD;Now you should find out the plastic injection molding cycle time and the mould cavity number, on this case, the estimated injection cycle is 30 seconds, then 1 hour has 60×2 shots, the assumed cavity is 2,then plastic machine processing costs is 30/(60x2x2),its injection molding is USD 0.125/piece.
      • Secondary process costs.it includes spray / silk printing / plating, and these can be asked from the suppliers respectively.
      • Packaging costs. According to the injection molding part bulk, the packaging carton / packaging bags and other expenses would be calculated.
      • transport costs. According to the shipment cost and the loading quantity, the each part transport cost could be calculated
      • Personnel expenses. Because the above cost does not include the cost of the personnel, the final price should include them.
      • Profits: it is the real and final part you will get, you could decide according to the factory situation; normally it is 10%-20%.The others like tax…
       

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