Sprues are typically composed of clean production scrap and can therefore be easily reused.

》Materialcost accounts foralmost 80% of the value of injection molded parts. In-house recycling of all such production scrap is therefore highly desirable.
Closed-loop recycling gives a second life to in-house production scrap and also pre-empts waste disposal costs and the excessive use of virgin resin.
Granulated in-house scrap can constitute as much as 25% of new parts.
Beside-the-press granulation eliminates the storage ortransportation of waste,thus minimizing thepotential for contamination of the material.
The ROl(Return On Investment) for beside-the-press granulation is typically just afew months.

The G-Max series Smart engineering - Compact granulators

Asmartautomatedwastenputforaclosed-loopgranulconveyingsystemisstandard.tfedsdirectlybacktotheMM (up to 50O tons) and grinds all soft to medium-hard plastics such as PP, PE, ABS, PU, PC.

Meteredfeedingviaspruepicker/conveyorandbulkywastesaremadeeffcientbyoptimalfeedinghopperclearance. Toollesscreenchanging andcleaningismadesimlethankstothetitinghopperhisallowsmuhbetteracestoth top of the cutting chamber and the swing-down screen cradle.

Achieving better cutting performance and maximizing cutting effciency

》The speed of 200\ r p\mathsf{m}\ @\ 50\ \mathsf{H}\bar{\iota} reducesunnecessaryrepeated cuts.Particles go through an optimized rotorand screen, producing cleaner regrind and thebest combination forthroughput.
Apowerfulgrindingactionreducesawiderangeofpartsizesandshapesinordertoprocessboththickandthinwalled materials using staggered or hybrid rotors.
{\mathfrak{n}} Reduced noise, energy consumption and rotor-stalling is achieved through smaller blade design.

Automatictensioningsystemonbeltdrive

AmaintenancefreesystemofbeltdriveuppliedTheautomatiselftensioningsystemelminatestheconstantned for retensioning the belt to prevent slipping and rotor-stalling. Greaterandmorecostefectivecutingforcesareachievedwithoutaddinghorsepowerthankstothemassivefywheel pulley which maximizes the inertia of the rotor.

Low noise levels during operation

Thesoundproofedfedinghopperincludessounddampeningmaterialthatisplacedetweetwsheetsofstainlesstel Thisreducesnoisewhenmaterialhitstheinsidewalls.

G-Max Series: Technical specifications

One size does not fit all

》The G-Max 9hopper comes in 3different styles.The granulator can be exactly matched toapplicationneeds,and canbe modified inthefield.
》Beside-the-press application withsprue picker orrobot.
》Mid-height in-feed hopperforplacement undera conveyorbelt ora drumseparator.
》Lower throattobeplaced directlyunderaslide chute adjacent to an IMM.

G-Max 9

》Cutting chamber: 130x260mm Staggered rotor: 9 blades 》Motor output:2.2 kW 》Rotor diameter:180 mm 》Regrind bin inlet volume:5liters Feeding height:1,150-880-650 mm

Standardfeatures

》The staggered rotor allows faster processing, and also provides a powerful cutting force by concentrating the total granulation energy into one short knife at a time. For convenience,the electrical panel can be relocated on thealternatesideaccording to theplacementof the granulator.
Regrind bin with fixed outlet.

Optionalfeatures

Lockinginmetallicparticlescanbepreventedbyplacing a magnet along one side of the feeding hopper. Grindinghot/warmmaterialswithawatercooledcutting chamber. Alarm sensorfor regrind level provides audible and visual alarms to avoid the overfilling of the regrind bin. Saving energy by shutting down the granulator via an electricalinterfacewhentheIMMisturnedoff.

G-Max 13

Cutting chamber: 247x284~mm 》Open rotor design:3 blades 》Motor output:3kW 》Rotor diameter: 180~\mathsf{mm} Regrind bin inlet volume:13 liters

G-Max 23

》Cutting chamber: 310x235~mm Hybrid-staggered rotor:6 blades 》Motoroutput:3kW Rotor diameter:220 mm Regrind bin inlet volume:13 liters

G-Max 33

Cutting chamber: 460x235~mm 》Hybrid-staggered rotor: 9 blades 》Motor output:4 kW Rotor diameter:220mm Regrind bin inlet volume:16 liters

Standard features

Effcientgranulationofmaterialsthatarestillwarm from processing is helped via airflow in the cutting chamberandby open spacesbetween the rotating knives and the center of the shaft of the hybrid-staggered and open rotor design. The electric panel can be located onboth sidesof the granulator. Regrind bin with fixed outlet.

Optional features

Locking in metallicparticles canbe preventedbyplacing a magnet along one side of the feeding hopper. Grindinghot/warmmaterialswithawater-cooled cutting chamber. Alarmsensorforregrindlevelprovidesaudibleandvisual alarms to avoid the overfilling of the regrind bin. Savingenergybyshutting downthegranulatorvia an electricalinterfacewhentheIMMisturnedoff.

Screenless granulators

Themost effcient and cost-effective grinding of engineeredresins aswellasstyrenics,acrylics, and glass-fiber-reinforced materials due to low speed (27\ r p m\circledast50\ H z)

Lowspeedmeanshightorque,lesswearoncutting toolsforreduced maintenance,lowsound levels, low energy consumption.The low speed decreases noise and flyback during operation and provides a consistent regrind and better quality.

Ideally suited for metered feed beside injection molding machines up to 300 tons.

The small footprint accommodates tight spaces and the wide-mouth, flared in-feed hoppereasilyhandles a range of robot or conveyor drops and sprue/runner sizes.

Easy usage dueto

Viewing window to provide visibility to the cutting chamber during operation.

Low noise levels during operation

The soundproofed feeding hopper includes sound-dampening material thatisplacedbetweentwo sheets of stainlesssteel. Thisreduces noise when material hits theinside walls.

S-Max 1

S-Max 2

Cutting chamber: 240x160~mm 》Number of cutters:1 》Motor output:0.75 kW Regrind bin inlet volume: 4.5 liters

Cutting chamber: 240x279~mm Number of cutters:2 Motor output: 1.1 kW Regrind bin inlet volume:6.5 liters

S-Max3

S-Max 2 plus

》Cutting chamber: 240x346~mm 》Number of cutters: 2 》Motor output:1.5 kW 》Regrind bin inlet volume:10.5liters

Cutting chamber: 240x467~mm Number of cutters:3 Motor output:2.2 kW Regrind bin inlet volume:12 liters

Optionalfeatures

Granulation of thicker-walled or tougher plastics with ARS(Automatic Reversing System)tohelp avoid rotor blocking in case of jams. Granulationoflargeandnestedspruesorpartscausingbridgingintothefeedinghopper,theecondshaft (S-Max 3 only) is a force feed system for pullin and pre-break actions. Locking inmetallicparticles canbe prevented byplacingamagnet alongone sideof thefeeding hopper. Grindinghot/warm materials with a water-cooled cutting chamber.
Saving energybyshutting down the granulatorvia anelectrical interface whenthe IMM isturned off.
Alarmsensorforegrind level provides audible and visual alarms to avoid the overflling of the regrind bin.

Screenless granulators for central scrap reclamation

S-MaxDualseries

Equipped with tworotorsinthe cutting chamberforlarge sprues and parts, the S-Max Dual is typically used offline, located away from the process.

Materialisfedintothe granulatorby a conveyorbelt orby dumping the content of a box directly into thefeed hopper of the granulator.

Alarmsensorforregrindlevelprovides audible andvisual alarmsto avoid the overflling of the regrind bin.

Possibility of different positions for vacuum take-off connection.

S-Max Dual 4

S-MaxDual 6

Cutting chamber: 530x346~mm Number of cutters: 4 Motor output: 2x2.2 kW Regrind bin inlet volume:25 liters

Cutting chamber: 530x467~mm Number of cutters:6 Motor output: 2x2.2 kW Regrind bininlet volume:30liters

S-MaxDual 8

Cutting chamber: 530x588~mm Number of cutters: 8 Motor output: 2x3 kW Regrind bininlet volume:40liters

Optional features

Granulation of thicker-walled ortougher plastics with ARS(AutomaticReversing System)tohelp avoid rotor blocking in case of jams. Granulationof large and nested sprues orpartscausing bridgingintothefeeding hopper,thethird shaft is a force feed system for pullin and pre-break actions. 》Locking inmetallic particles canbe prevented byplacing amagnet along one side of thefeedinghopper. Grindinghot/warm materials with a water-cooled cutting chamber. 》Automatic emptying system with a high capacity vacuum loader.

Medium-size blade granulator

G-Max XL

Efcientmediumbeside-the-press granulatorforbulkypartsfrom injectionmolding and/orblowmolding applications.

Veryruggedunitandextremelyversatil,canbeusedinrobotfed,conveyor-fedrhand-fedapplicatin.

Higherthroughput withlessmotorpower,lessnoise,andreducedfnes anddustduetoscissorcuting action and a slant-knife arrangement.

Efficient granulation of materialsthat arestillwarmfrom processing due to airflowthroughthecutting chamberbythe openspacesbetweentherotatingknives and thecentre oftheshaft ofthe3-blade open rotor design.

Easychangingofbladeswhichareadjustable andpre-adjustedtothe propergapoutsidethegranulator with the use of the knife gap pre-adjustment fixture.

Longer knife life due to adjustable rotating and stationary knives.

No contaminationoftheregrindbecause motorbearings arepositionedoutsidethecuttingchamber.

Screenchanging andcleaningareextremely simple withouttoolsduetothetitinghopperwhichallows better access to the top of thecutting chamber and the swing-down screen cradle.

Easytomaintainahighlevelofcleanliness because theregrind collectionbinismade ofstainlesssteel

Asoundproofedfeedinghopperincludessound-dampeningmaterialplacedbetweentwo sheetsofstainlesssteel,this reduces noise when materialhits theinside walls.

G-Max XL

Cutting chamber: 300x300~mm 》Motor output:5.5kW 》Rotor diameter:260 mm

Optional features

Mechanicalhighlevelsensorintheregrindcollectionbin. Locking inmetallic particles canbe prevented by placing a magnet along one side of the feeding hopper. Grindinghot/warm materials witha water-cooled cutting chamber. Granulation of thicker-walledpartsviaa massiveinertiaflywheelthatreduces the stalling of the rotor and minimizes motor amperage spikes. Granulation of long parts via rear feeding-allowing a more direct access to the cutting chamber. Automatic emptying system with a high capacity vacuum loader.

Scrapis gravity-fed directlyfromthe processingmachine,requiring noconveying ormanualhandling

Low profile and compact design fits under most presses.

A multi-positionswiveloutlet pipemakeseasierconnectiontotheflexiblehoseofthehopperloader.

Easy tomaintainahighlevelof cleanlinessbecause the regrind collectionbinismadeofstainlesssteel.

Regularfeedingofrunners/spruesinsidethecutingchamberduetoapre-cuttingknifeontheaugertube which pre-empts wrap-arounds and screw jams.

ScreenlessmodelMinor2A

》Low speed (27 rpm @ 50Hz)forthe most efficient and cost effective grinding of glass-filled plastics.
》 Allowsno"longs"and provides uniformregrind with minimal fines for efficient re-processing. Low-speed single pass processing means less wear on cutting tools forreduced maintenance,low sound levels,and lowenergy consumption.
"Cutting chamber: 240x249~mm
111 Number of cutters:2
》Opening of auger throat: 600x280~mm
_{11} Motor output: 2x1.1 kW
Feeding height: 595~\mathsf{mm} (optional: 545~\mathsf{mm}

Blade model MAS2A

Conventional model forprocessing softtomediumhardmaterials.

3-blade open rotor with adjustable rotating and stationary knives.

Scissor-type cutting actionforeffcientprocessing ofthin,soft,flexible materials.

Openrotor allowsforhigher airflow throughthe cutting chamber for more efficient processing of hot scrap.

”Cutting chamber: 247x255~mm 》Open rotor:3 blades Opening of auger throat: 600x280~mm 》Motor output: 4\mathsf{k W}+7.1 kW Feeding height: 602~\mathsf{mm} (optional: 522~\mathsf{mm}

Optionalfeatures

Prevents locking inmetallicparticlesvia a metal detection system.
Grinding hot/warm materials with a water cooled cutting
chamber and/or auger. RegulargranulationwithAutomaticReversingSystem on the auger rotor to reduce any stalling in case of jams. High level sensor for regrind bin.
Link to theIMM's doors with On/Off function of the granulator's screw.
Remote control boxtooperate the granulatorfrom the opposite side of placement.
WITTMANN Technology GmbH
Lichtblaustrasse 10
1220 Vienna|Austria
Tel: +43 1 250 39-0
info.at@wittmann-group.com

www.wittmann-group.com