Capabilities
Transfer Molding
 Custom Rubber Corp. has well over 100 years of institutional knowledge about
transfer molding.
Similar to compression molding, transfer molding
requires secondary raw material preparation into "pre-forms" that
are loaded into a "pot."
When the mold is closed, a "plunger" compresses the rubber in the "pot" and
forces it through holes or sprues into the cavity to fill the part cavity.
The advantages of transfer molding over compression molding can include:
- Fewer
and simpler pre-forms because one pre-form can fill hundreds of cavities.
- Tighter
dimensional tolerance control because the mold is not held open by excess
material spilling out of the cavity parting line; all the excess hold the "plunger" open
from the "pot."
- Colored rubber parts benefit because pre-forms
can be cut by hand from raw material sheets, significantly reducing the chance
of contamination that can come from mechanical prep for compression molding
or the injection screw and barrel in injection molding.
The primary disadvantage is increased waste; the "flash pad" or
rubber left in the pot after transfer is typically cured and has to be recycled
or thrown out.
For newly designed parts, Custom Rubber Corp. can help you determine the most
cost effective way to manufacture your solution: compression
molding, transfer
molding, or injection molding.
Custom Rubber Corp. is an active member of the RMA (Rubber
Manufacturer's Association) and one benefit to that membership is access to
industry-specific operator training for all of our manufacturing methods. If
you are interested in seeing a preview of the type of training all of our operators
receive, you can visit
the online site and learn a little about molded rubber.
See Other Capabilities
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