The Enduring Legacy of Simmons Cone Crushers: Design Excellence in Secondary and Tertiary Crushing

Por mais de um século, the name "Simmons" has been synonymous with robust, confiável, and efficient cone crushing technology within the aggregate mining and construction industries. While ownership and branding have evolved – most notably becoming part of under (and subsequently Outotec and now ) – the fundamental design principles established by Edgar B. Simmons remain a cornerstone of secondary and tertiary crushing circuits worldwide. Understanding these machines involves appreciating their historical significance, distinctive engineering features, vantagens operacionais, typical applications, maintenance considerations, and their place in today's diverse crushing equipment landscape.

A Historical Foundation

The genesis of the modern cone crusher is widely attributed to Symons Brothers founders William Symons Jr., his brother Robert Symons Sr., along with Edgar B. Simons (note spelling variation) em volta 1920 in Milwaukee, Wisconsin. Edgar B Simons was granted US Patent 1,488,428 on April 1st 1924 for his cone crusher design which formed the basis for what became known as the Symons Cone Crusher; Simons' name was eventually trademarked as SYMONS® which became synonymous with this style of crusher regardless of manufacturer later on due largely because acquired Symons Brothers Co.. This pioneering design introduced critical concepts like:

1. Gyratory Precession: Unlike jaw crushers that use compressive force in a linear motion or earlier gyratory designs primarily focused on primary crushing duties at larger sizes than typically associated today's 'cone' units; The Simons principle involved an eccentrically gyrating mantle within a stationary concave bowl liner creating compressive force through rotational movement combined effectively translating into powerful rock-on-rock compression plus attrition forces against liners themselves during each cycle rotationally speaking thereby efficiently reducing material size progressively down through chamber zones defined by spacing between mantle surface profile versus corresponding concave liner profiles above it below depending upon configuration specifics chosen per application requirements desired output gradations sought after product shape characteristics etcetera...

2. The Floating Shaft Principle: A hallmark innovation was incorporating bearings both above and below eccentric assembly supporting main shaft assembly allowing entire head/mantle combination essentially float freely atop hydraulic support system beneath enabling automatic compensation momentary tramp iron events uncrushable material entering chamber without catastrophic damage occurring components involved unlike rigidly mounted alternatives prevalent era time period invention took place originally conceived patented implemented successfully commercialized thereafter globally adopted standard practice industry wide decades following introduction initially marketplace