 Mack
Molding was recently approached with the opportunity to quote the
replacement of two, 4-cavity unscrewing molds used to manufacture seal
nuts, roughly 1-1/4” and 2” in diameter respectively, using PVC. The
older molds were run by another molding company and had a history of
excessive downtime that was attributed to their unscrewing cores.
Because the OEM customer would not be held responsible, Mack knew any
maintenance costs incurred within the first million cycles would be
their burden, so Mack hesitated to build new molds using the same
unscrewing methods.
Roehr Tool’s stainless steel DT Cores provided the solution and gave
Mack engineers the confidence they needed to introduce new designs to
its customer for more robust and reliable tools.
Carlson Tool & Mfg. Co. was selected by Mack Molding to build the new
tools, and found them to be “a very simple mold to design because it
didn’t have a complex unscrewing system,” said Brian Wagner, Engineering
Manager at Carlson Tool. “The simplicity was also apparent in the mold
building process.”
“The OEM customer verified that part quality was much improved and more
consistent, thus requiring less destructive testing,” states Jeff White,
senior account manager at Mack Molding. “Ease of maintenance was also a
selling point. Because of how they are constructed, the DT Cores can
even withstand welding for repairs or revisions.”
"From a production standpoint, we have been able to mold complex
internal threads very efficiently as a result of the collapsible cores,"
says Gene Birmingham,
 manufacturing manager at Mack's Cavendish, Vt.,
facility. "Eliminating complex unscrewing
mechanisms and additional sequencing saves time and helps us meet our
customer's production schedule."
To calculate the savings of a collapsible core mold versus an unscrewing tool,
tooling engineers can now access an online cost justification calculator.
Access this new tool at
www.procomps.com/Math. |
