Poly Seal Industries is a leading provider of molded and custom rubber goods with the ability to support projects from the design and engineering phases through final delivery to the customer.
A customer in the food production industry needed a rubber knife that would cut uncooked dough into a specific shape while the dough passed through on a special conveyor. The customer's original design needed to be re-engineered to improve the consistency of the cut, while increasing durability of the knife. The original design was difficult to mold and still hold the required tolerances and it did not function to the customer's satisfaction. Our engineering team worked with the customer to co-design the new rubber knife. Factors that figured into this new design included: a food grade elastomer, which could not be affected by oils, extreme durability (tens of thousands of cut cycles per day) and compliancy that would prevent damage to plastic trays that the knife cut against. Once the design was completed, we designed the production process to produce a part that met the highest quality at the lowest possible cost. The process utilizes mills, calendars, die cutting machines, and a 300 ton molding press. The material used for the knife is a carboxylated nitrile rubber that encapsulates a spring steel insert. Overall part dimensions are 1.5" wide by 14" in length.
For more information on our project, or the processes involved in manufacturing this part see the table below or contact us directly.