The Linear Vibrating Screen (also known as a Linear Pellet Screener, Rectangular Vibratory Grader, or Pellet Classifier) is a high-efficiency size-classification and separation system designed for plastics pelletizing lines, masterbatch compounding plants, and polymer recycling facilities. Positioned directly downstream of centrifugal dryers, water-ring dewatering units, or strand pelletizers, the screener performs continuous inline classification: reliably scalping out oversized agglomerates and stringers, isolating off-spec fines and cutting dust, and delivering clean, precisely graded on-spec pellets to downstream storage, air cooling, or packaging stations.<\/p>\n
The machine is powered by dual synchronous contra-rotating vibration motors mounted at a precision inclination angle. As the two motors rotate synchronously in opposite directions, their eccentric centrifugal force components cancel each other out in the lateral direction while compounding along the longitudinal axis. This creates a powerful linear trajectory that fluidizes the polymer pellet bed, throwing particles upward and forward in a smooth, continuous conveying wave across the inclined screen deck.<\/p>\n
Depending on production cleanliness criteria and quality specifications, linear vibrating screens are configured with single-deck (two fractions) or double-deck (three fractions) separation layouts:<\/p>\n
The upper screen deck utilizes heavy-gauge SUS304 perforated punch plates or coarse mesh (typically 4.0 mm to 6.0 mm apertures). As bulk pellets flow over the deck, oversized agglomerates, doublets (twin pellets formed by strand contact in cooling troughs), polymer strings, and start-up clumps are prevented from falling through. These rejected lumps are continuously conveyed forward and discharged through the top oversize chute for offline granulating or reprocessing, protecting downstream molding machinery from nozzle blockages.<\/p>\n
On double-deck configurations, material that passes through the top screen lands onto a high-precision lower screen cloth (typically 1.5 mm to 2.0 mm apertures). Standard calibrated pellets cannot pass through this lower mesh and travel across the deck to discharge through the central on-spec product chute. Meanwhile, broken pellet fragments, tails, cutting dust, and abrasive fines fall through into the bottom collection pan and discharge via the undersize chute, ensuring that finished pellets are 100% dust-free and uniform in bulk density.<\/p>\n","protected":false},"excerpt":{"rendered":"
Industrial linear vibrating screen for plastic pelletizing lines, delivering continuous multi-fraction classification to scalp out agglomerates and eliminate fines and dust.<\/p>\n","protected":false},"featured_media":556,"template":"","equipment_category":[36,38],"process_stage":[44],"material_family":[131,133,139,129,95,132],"material_form":[75],"production_problem":[116,108],"class_list":["post-248","equipment","type-equipment","status-publish","has-post-thumbnail","hentry","equipment_category-pelletizing-auxiliaries","equipment_category-screening-separation","process_stage-post-pellet-treatment","material_family-modified-plastics","material_family-multifunctional-masterbatch","material_family-recycled-plastics","material_family-resin","material_family-rubber","material_family-thermoplastic-elastomer","material_form-pellets","production_problem-off-spec-pellet-size-and-fines","production_problem-sticking-and-agglomeration"],"_links":{"self":[{"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/equipment\/248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/equipment"}],"about":[{"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/types\/equipment"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/media\/556"}],"wp:attachment":[{"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/media?parent=248"}],"wp:term":[{"taxonomy":"equipment_category","embeddable":true,"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/equipment_category?post=248"},{"taxonomy":"process_stage","embeddable":true,"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/process_stage?post=248"},{"taxonomy":"material_family","embeddable":true,"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/material_family?post=248"},{"taxonomy":"material_form","embeddable":true,"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/material_form?post=248"},{"taxonomy":"production_problem","embeddable":true,"href":"https:\/\/polypelletizer.com\/wp-json\/wp\/v2\/production_problem?post=248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}