Alternatives to overmolding

Discussion in 'SolidWorks' started by scorsi, Jan 15, 2006.

  1. scorsi

    scorsi Guest

    Hello all,

    I am lead development designer for a new cosmetics packaging (compacts,
    bottles lipsticks etc)for a very high profile fashion house. The core
    concept of the the look we have been directed to acheive is a clear
    acrylic shell with a colored inner wall that shows through from the
    inside. To acheive this effect, the best way we know is to overmold the
    two layers and so all design direction for tooling has been to this
    end. However, the tooling costs that we are recieving from our
    candidate manufacturers are a little prohibitive. Therefore, I would
    very much appreciate some input into alternative processes to achaive
    the colored inner wall effect.

    So far, we have considered: spraying - ruled out because hard to
    control

    Separate moldings then inserted: ruled out because fused effect of two
    materials against each as seen from outside can not be achieve due to
    reflection from inside surface of acrylic- Any methods to reduce
    reflection?

    insert molding: a form of overmolding, we will proably use in some
    cases because cheaper methodology but still bond between surfaces can
    lack integrity

    Cubic transfer: won't work because concave area is to be coloured


    Our first year production requirements will be @ 100,000 pieces.

    Very much appreciate any input,

    scorsi
     
    scorsi, Jan 15, 2006
    #1
  2. scorsi

    slohcin Guest

    Looks to me as though your alternative forms of manufactue would be
    more expensive than overmoulding.
    We use Chinese sources for our overmoulded parts (Instrument Cases) and
    have found that both part and tooling costs are quite reasonable. I
    should add that our quantities are at around 1/10th of your estimated
    annual production.

    Pete
     
    slohcin, Jan 15, 2006
    #2
  3. scorsi

    Bo Guest

    Expense is always the issue.

    Plasma coatings (ala aerospace & military work) can achieve some
    surprising results, but again, it isn't cheap.

    Bo
     
    Bo, Jan 15, 2006
    #3
  4. scorsi

    cadPIRATE Guest


    Aye,

    Me thinks Petey be right mateys. Set the black powder t' the many hands
    in asia to ease the purse string woes ye be havin scorsi.
    ..

    Arrrrr
     
    cadPIRATE, Jan 16, 2006
    #4
  5. scorsi

    parel Guest

    Insert molding can be designed very strong. Perhaps a mechanical
    feature can be designed in to hold the over-mold better?

    Perhaps you can blow-mold the colored part into the transparent acrylic
    shell?
     
    parel, Jan 16, 2006
    #5
  6. scorsi

    cadPIRATE Guest

    hmmmm... Molds fer the blowin.... me old sea wind blown brain never
    considered that.


    Arrrrrrr
     
    cadPIRATE, Jan 16, 2006
    #6
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