New mould design?
New mould design?
(OP)
I am trying to redesign a mould for making rubber to AL bonded parts in a press.
Does anyone have any useful links to help?
Is it possible to inject mould rubber?
Does anyone have any useful links to help?
Is it possible to inject mould rubber?






RE: New mould design?
RE: New mould design?
Many elastomers or "synthetic rubbers" can be injection moulded
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RE: New mould design?
Bright
Sr.Project Manager&GM
HT-MOLDS
www.ht-molds.com
RE: New mould design?
To answer your 2nd question, yes you can injection mold rubber although it is not done very often in an overmolding application. I would go with compression if the design allows for it.
RE: New mould design?
For good adhesion of rubber to aluminum parts, the aluminum is usually copper plated.
This is also true for steel, e.g., wire used in the tire bead is " usually coated with Bronze (Cu : Sn) or Brass Coating (Cu: Zn) for achieving adhesion with rubber." -- http://en.wikipedia.org/wiki/Tire_manufacturing
Another technique is to roughen the aluminum surface and use a bonding agent. See
Improve Adhesion to Aluminum Extrusion
thread367-125777
& 'Chemlok Rubber-to-Substrate Adhesives' at http://www.lord.com/tabid/3261/Default.aspx
Suitable adhesive is available for coating the metal insert prior to molding the rubber.