Cryogenic deflashing for molded rubber parts

July 19, 2023 RubberWorld 3681 Views 2023, July

Flash is excess rubber that protrudes from the surface of a molded part. This defect is common to injection, transfer and compression molding, and can be caused by worn tooling, improper venting, low clamping pressure, low viscosity or uneven flow. Even a small amount of mold flash reduces part quality; but excessive flashing can interfere with part performance or product assembly. Rubber molders have a choice of deflashing methods, but cryogenic deflashing provides cost saving advantages and improves quality and consistency across elastomers and applications.

Articles Featured Patents

Patents for July

July 19, 2023 RubberWorld 2748 Views 2023, July

Patents as collected for the month of July by the editors of Rubber World Magazine Tire sensor container system for

Articles Featured Tire Technology & Manufacturing

Devulcanization: A solution for scrap rubber

May 23, 2023 RubberWorld 3443 Views 2023, May

Development of a market for devulcanized and revulcanized rubbers can be achieved with in-depth understanding of the precise correlation among the physical and chemical properties of the initial vulcanizate, the devulcanization technique, and properties of the resulting devulcanizates.

Articles Carbon Black, Silica & Reinforcing Materials Extrusion Featured

Effect of Thermax N990 on EPDM electrical percolation threshold

May 23, 2023 RubberWorld 4330 Views 2023, May

Blends of hard clay, N990 and N550 were utilized to evaluate the electrical percolation region of EPDM compounds; and the viscosity and physical properties of the compounds were also measured.

Articles Extrusion Featured

Continuous extrusion processes for elastomeric materials

May 23, 2023 RubberWorld 4274 Views 2023, May

Principal methods for processing elastomeric materials are reviewed, including continuous extrusion and what is described as multi-step extrusion.

Articles Featured Latex and Natural Rubber

Latex today with Jim Finn: The Lightning Round

May 23, 2023 RubberWorld 2875 Views 2023, May

The objective here is to provide a list of common latex types, their key characteristics, and a summary of their useful properties and contributions. It is unlikely that the summary will capture all the salient points of each latex type; but it should provide enough information to be useful if called upon to deliver a “30 second commercial.”

Articles Featured Patents

Patents for May

May 22, 2023 RubberWorld 2453 Views 2023, May

Patents as compiled by the editors of Rubber World for May 2023 Fluid infused elastomersU.S. patent: 11,584,841Issued: February 21, 2023Inventors:

Articles Extrusion Featured

Novel approach to solve EPDM bonding issue without surface treatment

May 22, 2023 RubberWorld 4256 Views 2023, May

High dyne EPDM compounds offer an exceptional high surface energy level with a minimum of 58 dynes/cm, which is higher than all known rubbers, and at least twice as high as that of a typical EPDM compound.

Articles Featured Patents

Patents for April

April 14, 2023 RubberWorld 2227 Views 2023, April

Patents as compiled by the editors of Rubber World for April 2023 Crosslinked rubber composition and production method thereforU.S. patent:

Articles Featured Mixing

Silane modified low molecular weight liquid polymers in sulfur cured mixtures of styrene butadiene copolymers and silica

March 21, 2023 RubberWorld 4608 Views 2023, March

Global emissions of greenhouse gases from trucks and passenger cars are influenced by the deformation energy and friction losses of tires. It is mostly associated with the rolling resistance between the tire tread and the road surface. For this reason, the rolling resistance is considered one of the most important performance indicators (that is, targeted to be reduced) within the tire industry.