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Custom Tooling

Some of the finest toolmakers in the country are located in Dayton, Ohio. For 53 years, C & M Rubber Co. has worked with many toolmakers to produce high quality and durable tooling. The tools range from a simple-O-ring to parts consisting of sophisticated, geometrical curves with challenging dimensional tolerances. Ultimately, our customers enjoy the benefit of our years of tooling and molding experience by incorporating our proprietary know-how into their tooling. These unique techniques contribute to a dimensionally true part that costs less to mold and process into a finished part. The best news is we can accomplish all of this within budget and on time.

Prototype Lead Time
As a general rule, discounting cueing delays as a result of heavy job scheduling demand and depending upon geometric complexity, a single cavity prototype can be completed in as few as 15 days. To minimize delivery disappointment, it is recommended that a drop dead date be established prior to "cutting steel".

Production Tool Lead Time
As a general rule, it is recommended that you allow at least 75 days and sometimes 90 days for production tool completion. If you are looking at constructing a Liquid Injection Mold, lead times can range from 90 to 120 days due to the tight tolerances required for successful tool performance.

There are many factors that effect tooling delivery, including:

  • The geometric complexity of the molded part is a prominent factor in the lead-time required to complete a mold (tool). Some molded shapes require complex, multi-stage cutting and the use of sophisticated CNC machines to create the finished product.
  • The higher the cavity count, the longer it will take to complete a mold.
  • The closer the dimensional tolerances, the longer the lead-time will be.
  • Dimensional changes processed after steel cutting has commenced will extend the lead-time and may require abandoning the current tooling project and starting over. 


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Custom Tooling Capabilities

Max. Tooling Dimension 24" W x 24"D
Max. Tooling Height 2" to 7" Range
Preferred Composition Unalloyed Tool Steel - Production & Prototype
Max. Cavity Count Part size & target piece price are determining factors
Mold Types Compression, Transfer and Liquid Injection Mold (LIM)
Mold Configuration Single Cavity Prototype, Sleeve Prototype Mold
Single Layer Production or Book Mold Production
De-molding Cavity Treatment Polished, Matte, Titanium/Nickel & PTFE/Nickel
Tolerances PDFSee RMA Dimensional Tolerance Table (PDF - 344KB)
Shrink Factor 2.5% to 3.5% - part size, thickness, specific application & environment, mold type and raw material will influence final shrink percentage used.
Preferred Drawing Software -Autodesk Inventor Compatible with PDF Files, .JPG, .TIF, Most major drawing standards, 3D models in SAT or JT & DWF Publishing and Markup
Lead Time Tool geometry, complexity, cutting method (mechanical, EDM, plasma) & specified tolerances are all factors in lead time. There is no rule of thumb; however, prudent planning allocates 4-6 weeks for average tool creation. Also factor in time necessary to qualify the tool for dimensional accuracy, form, fit and finish in your assembly.

Quality Assurance

Engineering Support
49 Years of Silicone Molding Experience
Prototyping Expertise
Tooling Design Review & Creation w/Autodesk Inventor 2009
Statistical Process Control
Material Selection Consultation & Recommendation
UL & NSF Application Assistance/Submission

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