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Question on Casting Medium

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  • aquatroy
    Permanent Member
    • Apr 28, 2002
    • 3289

    Question on Casting Medium

    In the past I've exclusively used smooth on 300/305. I'm designing a new body and I've found that 300/305 just isnt strong enough for certain parts I've developed. I need something with the same viscosity, but much stronger.
    Any suggestions?

    Troy
    Hey! Check out the pictures.
  • Type3Toys
    Home Of The Type3 Body
    • Jan 18, 2005
    • 619

    #2
    I've never had a problem with the strength of 305. Even on the ancle piece I designed for my Type3toys custom body.
    I have literally made 100s of bodies and only one body part has ever failed. That's going all the way back to 2004.
    What body part are you having an issue with?
    LOOK
    Action Figure Design & Prototypes
    For Samples See Home -Type 3 Body & Spiderman
    To Contact: type3toys@comcast.net

    Comment

    • aquatroy
      Permanent Member
      • Apr 28, 2002
      • 3289

      #3
      It's a ball joint on the hip. I feel like 305 is going to a bit soft and wear down. And, when I try to remove the leg the ball tears away from the rest of the piece.
      Hey! Check out the pictures.

      Comment

      • Doctor Dim
        New Member
        • May 18, 2017
        • 32

        #4
        Do you cast in a vacuum pot? I've found that to significantly strengthen resin casts.

        Comment

        • Type3Toys
          Home Of The Type3 Body
          • Jan 18, 2005
          • 619

          #5
          Originally posted by aquatroy
          It's a ball joint on the hip. I feel like 305 is going to a bit soft and wear down. And, when I try to remove the leg the ball tears away from the rest of the piece.
          Not sure I'm following you. Ball at the top of the thigh? Is it a separate piece?
          I have never had a 305 piece wear down. I have pieces that are easily 10 years old+.
          The difficult part is creating enough drag on resin to resin parts.
          LOOK
          Action Figure Design & Prototypes
          For Samples See Home -Type 3 Body & Spiderman
          To Contact: type3toys@comcast.net

          Comment

          • aquatroy
            Permanent Member
            • Apr 28, 2002
            • 3289

            #6
            Yes. It's ball joint at the top of the leg. It would be the hip.
            Thanks for the info. Perhaps the real problem is that I'm not trusting the casting medium.
            Hey! Check out the pictures.

            Comment

            • aquatroy
              Permanent Member
              • Apr 28, 2002
              • 3289

              #7
              In the past I've used a vacuum food storage device and found that casting medium would "boil" in a vacuum. I would end up with parts with a honeycombed interior. Would a proper vacuum pot solve this? How about a pressure pot? I've seen youtube vids of people using a pressure pot and getting beautiful casts.
              Hey! Check out the pictures.

              Comment

              • Doctor Dim
                New Member
                • May 18, 2017
                • 32

                #8
                I'm sorry; I meant to say a pressure pot. A vacuum chamber is better for the molds themselves, but takes too long for resin. 50 psi in a pressure pot should give you bubble-free casts.

                Comment

                • aquatroy
                  Permanent Member
                  • Apr 28, 2002
                  • 3289

                  #9
                  It's something Im going to look into. Thanks.
                  Hey! Check out the pictures.

                  Comment

                  • Confessional
                    Maker & Whatnot
                    • Aug 8, 2012
                    • 3410

                    #10
                    Other helpful suggestions… don't overlook the value of high quality, properly-built molds, as well as molds that are properly poured with resins that are carefully mixed. Many things can be cast without the use of a pressure pot by controlling these factors well.

                    Comment

                    • LonnieFisher
                      Eloquent Member
                      • Jan 19, 2008
                      • 10814

                      #11
                      If you use a pressure pot to cast, you have to make your molds with a vacuum chamber. Otherwise you will get "warts" all over the castings. Any tiny bubbles in the mold will collapse.

                      Comment

                      • aquatroy
                        Permanent Member
                        • Apr 28, 2002
                        • 3289

                        #12
                        That's a great tip. Thanks.
                        Hey! Check out the pictures.

                        Comment

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