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Recent content by breezy83

  1. breezy83

    Brittle Diecast Zinc (ZA8)

    Hello, I'm seeing a zinc diecast cylindrical rod failing (shearing off) prematurely (small moments applied). I had a composition analysis done, which showed the presence of the following materials, which aren't specified to be part of the alloy: Phosphorus (0.02%), Silicon (0.03%), and Tungsten...
  2. breezy83

    Quality Control Process for China

    Hello, I've been having a product manufactured in China for about 1 year, and currently we have a 3rd party do an Final Random Inspection on ~7.5% of the 1st completed container of the build. So far the quality has been good and we haven't had any major issues, but this process doesn't allow us...
  3. breezy83

    Brass Cylinder Shear Failure

    Hello, I'm recently had a few shear failures for a turned brass H59 part (see the link below for an image). My gut tells me that it's a material defect, since we've made over 10k of these prior and only just started seeing this failure mode. Does this make sense? Has anyone seen this before...
  4. breezy83

    General Profile Tolerance for Injection Molding

    Hi, I was hoping someone could tell me a reasonable value for a general profile tolerance for injection molded parts. Thanks!
  5. breezy83

    Dyson material/finish question

    Hello, I was hoping someone could tell me how Dyson achieves the look of the attached plastic part. Is it an in-mold label? I would appreciate any feedback you have!https://files.engineering.com/getfile.aspx?folder=5f4f404a-e737-496c-8e3f-fa4f80ced4d5&file=dyson_pic1.JPG
  6. breezy83

    Foreign Diecast and Extrusion Vendor Recommendations

    Apologies, I am in the US and looking for low-cost vendors for these 2 processes. As for process details, I need pressure diecasting, and the extrusions are a mix of custom profiles and off-the-shelf cut-to-length. I hope this clears everything up!
  7. breezy83

    Foreign Diecast and Extrusion Vendor Recommendations

    Hello, I'm working through my supply chain for a new product I'm working on, and my old overseas vendors for diecasting and metal extrusions have dried up. Does anyone have any recommendations for good foreign vendors for these two fabrication methods? I would really appreciate any...
  8. breezy83

    Metallic Looking Resin Color for Plastic

    Hello, I'm trying to see if I can avoid plating a plastic component I have by using a resin color that looks metallic. I've seen this on products before, but I don't know where to look to find these types of colors/processing parameters. Does anyone have any advice? Thanks!
  9. breezy83

    Chrome Plating after Ultrasonically Welding

    Has anyone had success with chrome plating on 2 plastic (ABS plating grade) parts that have been ultrasonically welded together? I received DFM feedback from 1 vendor that said they thought there would be discoloration around the seam due to an inability to properly clean that area. I would...
  10. breezy83

    Long Internal Cavity Injection Molding Question

    Thanks! Do you know what draft is required for this type of core-pull?
  11. breezy83

    Long Internal Cavity Injection Molding Question

    Hello, I recently was wondering how the crevice tool attachment of my vacuum is made (see picture link below). It has a long internal cavity with minimal to no draft. The only thing I can think of is that it's either made in 2 halves and then ultrasonically welded, or it utilizes a collapsible...
  12. breezy83

    Joining mirrored diecast parts

    drawoh, Thanks for your response! I'm avoiding fasteners for aesthetic reasons. The parts aren't finalized yet, and won't be fully mirrored. I definitely haven't ruled out glue, but is there any reason you wouldn't use an interference fit to mate the halves? I was thinking of bosses for...
  13. breezy83

    Joining mirrored diecast parts

    Hello, I'm looking to join 2 mirrored diecast parts. Basically, I'm looking for the equivalent to ultrasonic welding for diecasting. Does anyone know the best practice to achieve this? The materials I'm considering are AL or a Zinc AL alloy (Z8). I would appreciate any advice, thanks!
  14. breezy83

    Plastic Creep Question

    Hello, I'm designing an ABS plastic part that's going to experience a constant load (see image link below). I'm concerned that the surface under load will creep over time. If this surface deflects too much or breaks, then this could cause failure of the product. I can't seem to find creep...
  15. breezy83

    Valve design guide recommendations

    Hello, I'm an ME of 14 years, but have only worked on electromechanical consumer products, and haven't work with fluids. I working on a project now that requires me to design a 3 way valve for a shower application, and I was hoping to find some design guide recommendations. Any help would be...
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