[{"data":1,"prerenderedAt":739},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio:*":258,"guides:topics:barrel-screw:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio:path,title,short":504,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw:diagram":557,"diagram:id:injection-unit":558,"catalog:parts::MC-BC-02":731},{"categories":4,"machines":132,"zones":212,"totals":255},[5,35,59,122],{"id":6,"name":7,"slug":8,"description":9,"partCount":10,"subcategories":11},"EC","Electrical Components","electrical","Electrical systems and components for injection molding machines including heaters, thermocouples, servo motors, and controllers.",11,[12,17,22,27,31],{"id":13,"name":14,"slug":15,"partCount":16},"EC-CBC","Circuit Boards & Controllers","circuit-boards",4,{"id":18,"name":19,"slug":20,"partCount":21},"EC-CE","Connectors & Cables","connectors-cables",2,{"id":23,"name":24,"slug":25,"partCount":26},"EC-GEP","Servo Motors & Drives","servo-motors",1,{"id":28,"name":29,"slug":30,"partCount":21},"EC-HT","Heaters","heaters",{"id":32,"name":33,"slug":34,"partCount":21},"EC-SF","Safety Components","safety",{"id":36,"name":37,"slug":38,"description":39,"partCount":40,"subcategories":41},"HY","Hydraulic Components","hydraulic","Complete range of hydraulic system components including pumps, valves, motors, and pressure controls for injection molding machines.",14,[42,46,51,55],{"id":43,"name":44,"slug":45,"partCount":26},"HY-AU","Accumulators","accumulators",{"id":47,"name":48,"slug":49,"partCount":50},"HY-CV","Control Valves","control-valves",6,{"id":52,"name":53,"slug":54,"partCount":26},"HY-MO","Monitors & Gauges","monitors-gauges",{"id":56,"name":57,"slug":58,"partCount":50},"HY-PW","Pumps & Motors","pumps-motors",{"id":60,"name":61,"slug":62,"description":63,"partCount":64,"subcategories":65},"MC","Mechanical Components","mechanical","Mechanical parts and assemblies including barrels, screws, tie bars, bushings, platens, and clamping components.",42,[66,71,75,80,85,89,93,97,101,105,109,114,118],{"id":67,"name":68,"slug":69,"partCount":70},"MC-BC","Barrels & Cylinders","barrels-cylinders",5,{"id":72,"name":73,"slug":74,"partCount":16},"MC-SB","Screw Barrels & Seals","screws",{"id":76,"name":77,"slug":78,"partCount":79},"MC-TC","Tie Bars & Columns","tie-bars",7,{"id":81,"name":82,"slug":83,"partCount":84},"MC-GZ","Bushings & Guides","bushings-guides",8,{"id":86,"name":87,"slug":88,"partCount":26},"MC-PP","Platens","platens",{"id":90,"name":91,"slug":92,"partCount":70},"MC-TL","Toggle & Links","toggle-links",{"id":94,"name":95,"slug":96,"partCount":21},"MC-CC","Clamping Components","clamping",{"id":98,"name":99,"slug":100,"partCount":21},"MC-GMP","Tools & Accessories","tools-accessories",{"id":102,"name":103,"slug":104,"partCount":21},"MC-ES","End Caps & Plates","end-caps",{"id":106,"name":107,"slug":108,"partCount":26},"MC-SR","Seals & Rings","seals-rings",{"id":110,"name":111,"slug":112,"partCount":113},"MC-JM","Joints & Mounts","joints-mounts",3,{"id":115,"name":116,"slug":117,"partCount":26},"MC-SG","Safety Guards","safety-guards",{"id":119,"name":120,"slug":121,"partCount":26},"MC-CR","Clamping Mechanism","clamping-mechanism",{"id":123,"name":124,"slug":125,"description":126,"partCount":113,"subcategories":127},"O","Other Components","other","Additional components including filters, cooling systems, lubrication parts, and other auxiliary equipment.",[128],{"id":129,"name":130,"slug":131,"partCount":113},"O-TC","Filters & Cooling","filters-cooling",[133,143,161,172,180,188,194,200,205],{"id":134,"name":135,"slug":134,"series":136,"partCount":142},"haitian","Haitian International",[137,138,139,140,141],"Mars Series (MA)","Jupiter Series (JU)","Zhafir Venus Series (VE)","Zhafir Zeres Series (ZE)","Zhafir Jeres Series (JE)",68,{"id":144,"name":145,"slug":144,"series":146,"partCount":160},"yizumi","Yizumi",[147,148,149,150,151,152,153,154,155,156,157,158,159],"A6 Series","A5-EU Series","A5-N Series","SKIII Series","DP Series","D1 Series","FF Series","FF-M Series","P Series","CG-P Series","VM Series","SPET Series","LSR Series",12,{"id":162,"name":163,"slug":162,"series":164,"partCount":171},"chen-hsong","Chen Hsong",[165,166,167,168,169,170],"JETMASTER MK Series","JETMASTER SVP Series","SUPERMASTER Series","EASYMASTER Series","SPARK Series","JETMASTER C2 Series",10,{"id":173,"name":174,"slug":173,"series":175,"partCount":179},"tederic","Tederic",[176,177,178],"NEO Series","D Series (Two-Platen)","DE Series (All-Electric)",0,{"id":181,"name":182,"slug":181,"series":183,"partCount":179},"borch","Borch",[184,185,186,187],"BU Series (Two-Platen)","BS-III Series (Servo)","BE Series (All-Electric)","BM Series (Multi-color)",{"id":189,"name":190,"slug":189,"series":191,"partCount":179},"log-machine","LOG Machine",[192,193],"LOG-SE Series","LOG-EE Series (All-Electric)",{"id":195,"name":196,"slug":195,"series":197,"partCount":179},"donghua","Donghua",[198,199],"DH Series (Servo)","DH-TP Series (Two-Platen)",{"id":201,"name":202,"slug":201,"series":203,"partCount":179},"sunbun","Sunbun",[204],"Sunbun Servo Series",{"id":206,"name":207,"slug":206,"series":208,"partCount":179},"lijin","L.K. Machinery (Lijin)",[209,210,211],"POTENZA Series","FORZA Series (Two-Platen)","ELETTRICA Series (All-Electric)",[213,217,221,225,228,231,235,238,242,248,251],{"id":214,"number":26,"name":215,"role":216,"partCount":21},"clamp-cylinder","Clamping cylinder","The hydraulic cylinder behind the rear platen. It drives the crosshead that straightens the toggle links, which opens and closes the mold and builds the clamping force.",{"id":218,"number":21,"name":219,"role":220,"partCount":50},"toggle","Toggle mechanism","Links, pins and bushings between the rear and moving platens. They multiply the force of the clamping cylinder and lock the mold shut while plastic is injected.",{"id":222,"number":113,"name":223,"role":224,"partCount":113},"ejector","Ejector","A small cylinder behind the moving platen that pushes the ejector rods and plate forward to release the finished part from the mold.",{"id":78,"number":16,"name":226,"role":227,"partCount":40},"Tie bars & bushings","Four steel columns that join the platens, guide the moving platen and carry the clamping force. Tie bar nuts lock them in place; bushings guide the moving platen along them.",{"id":88,"number":70,"name":229,"role":230,"partCount":21},"Platens & mold plates","The fixed and moving platens carry the two halves of the mold; the rear platen anchors the toggle. Locating rings and clamping plates center and hold the mold.",{"id":232,"number":50,"name":233,"role":234,"partCount":50},"barrel-screw","Barrel, screw & nozzle","The screw turns inside the heated barrel to melt and mix the plastic, then moves forward to inject it through the nozzle into the mold. The screw tip and check ring stop melt from flowing back.",{"id":30,"number":79,"name":236,"role":237,"partCount":113},"Heater bands & sensors","Heater bands around the barrel and nozzle melt the plastic. Thermocouples measure each heating zone so the controller can hold the set temperature.",{"id":239,"number":84,"name":240,"role":241,"partCount":79},"injection-unit","Injection unit","Injection cylinders push the screw forward, the hydraulic (plasticizing) motor turns it, and the carriage moves the unit against the mold on its guide rails.",{"id":243,"number":244,"name":245,"role":246,"partCount":247},"hydraulics",9,"Hydraulic unit","The pump, motor, valves, accumulator, filters and oil cooler in the machine base. They supply and control the oil pressure for every movement of the machine.",16,{"id":8,"number":171,"name":249,"role":250,"partCount":244},"Electrical cabinet","The controller, I\u002FO and drive boards, servo drives, contactors and safety switches that run and protect the machine.",{"id":252,"number":10,"name":253,"role":254,"partCount":21},"feet","Machine feet","Leveling bolts and anti-vibration pads under the machine base that keep the machine level and stop vibration spreading to the floor.",{"parts":256,"subcategories":257},70,23,{"id":259,"title":260,"body":261,"description":476,"diagram":477,"extension":478,"faq":479,"item":492,"lastModified":493,"meta":494,"navigation":495,"order":10,"parts":496,"path":498,"seo":499,"seoTitle":500,"short":501,"stem":502,"__hash__":503},"guides\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio.md","Screw L\u002FD ratio and compression ratio in injection molding",{"type":262,"value":263,"toc":465},"minimark",[264,268,277,282,285,291,294,297,301,308,314,319,326,330,333,338,341,355,359,411,414,418,445,449,452],[265,266,267],"p",{},"The L\u002FD ratio of an injection molding screw is its flighted length (L) divided by its nominal diameter (D), and the compression ratio is the depth of the screw channel in the feed zone divided by its depth in the metering zone. Together they describe how much work the screw does on the plastic as it melts it. General-purpose injection screws typically have an L\u002FD of about 20:1 to 25:1 and a compression ratio between about 2:1 and 3:1, but the right values depend on the material and the machine.",[265,269,270,271,276],{},"Both ratios describe the screw, item 4 in the drawing. For the screw's parts and its three zones, see the ",[272,273,275],"a",{"href":274},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew\u002F","screw guide",".",[278,279,281],"h2",{"id":280},"how-to-calculate-the-ld-ratio","How to calculate the L\u002FD ratio",[265,283,284],{},"Divide the flighted length by the nominal diameter:",[265,286,287],{},[288,289,290],"strong",{},"L\u002FD = flighted length ÷ screw diameter",[265,292,293],{},"For example, a 40 mm screw with 880 mm of flights has an L\u002FD of 880 ÷ 40 = 22, written 22:1.",[265,295,296],{},"Not every data sheet measures L the same way. Most use the flighted length; some use the effective length, from the front edge of the feed opening to the front of the flights. Check which one a machine or screw specification uses before comparing two screws.",[278,298,300],{"id":299},"what-the-ld-ratio-changes","What the L\u002FD ratio changes",[265,302,303,304,307],{},"A ",[288,305,306],{},"longer"," screw (higher L\u002FD) gives the plastic more time and more flights to heat, melt and mix in. It produces a more uniform melt, handles higher outputs and mixes colors better. The drawbacks are a longer residence time, which can degrade heat-sensitive materials, more torque to turn the screw, and a longer screw that is harder to keep straight.",[265,309,303,310,313],{},[288,311,312],{},"shorter"," screw keeps the plastic in the barrel for less time, which suits heat-sensitive materials. Screws for thermosets are short, with little or no compression, because the material must not cure in the barrel.",[315,316,318],"h3",{"id":317},"effective-ld-during-screw-recovery","Effective L\u002FD during screw recovery",[265,320,321,322,276],{},"As the screw recovers, it moves backward, and the rear flights pass behind the feed opening. The length of flights doing work in front of the feed opening shrinks by the length of the stroke. With a long shot stroke, the last part of the shot is melted by a shorter screw, so melt quality can fall at the end of recovery. This is one reason why very large shots relative to the barrel are avoided; see the ",[272,323,325],{"href":324},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size\u002F","shot size calculation",[278,327,329],{"id":328},"the-compression-ratio","The compression ratio",[265,331,332],{},"In its simplest form, the compression ratio is:",[265,334,335],{},[288,336,337],{},"Compression ratio = feed zone channel depth ÷ metering zone channel depth",[265,339,340],{},"For example, a screw with a 6.0 mm deep channel in the feed zone and a 2.4 mm deep channel in the metering zone has a compression ratio of 6.0 ÷ 2.4 = 2.5:1. Some screw makers calculate it from the channel volumes per turn instead of the depths, which gives a slightly different figure.",[265,342,303,343,346,347,350,351,354],{},[288,344,345],{},"higher"," compression ratio squeezes and shears the plastic more, which helps melting and mixing but adds heat. A ",[288,348,349],{},"lower"," ratio is gentler, for materials that degrade with heat or shear. The ",[288,352,353],{},"length"," of the compression zone matters as well: a long, gradual compression zone suits materials that soften over a wide temperature range, and a short one suits materials that melt over a narrow range.",[278,356,358],{"id":357},"screw-geometry-by-material","Screw geometry by material",[360,361,362,375],"table",{},[363,364,365],"thead",{},[366,367,368,372],"tr",{},[369,370,371],"th",{},"Material type",[369,373,374],{},"Typical screw choice",[376,377,378,387,395,403],"tbody",{},[366,379,380,384],{},[381,382,383],"td",{},"General-purpose plastics such as PP, PE, PS and ABS",[381,385,386],{},"General-purpose three-zone screw",[366,388,389,392],{},[381,390,391],{},"Heat-sensitive plastics such as rigid PVC",[381,393,394],{},"Lower compression with a gradual compression zone, often with a free-flow tip",[366,396,397,400],{},[381,398,399],{},"Semi-crystalline plastics that melt over a narrow range, such as nylon",[381,401,402],{},"Short compression zone",[366,404,405,408],{},[381,406,407],{},"Thermosets",[381,409,410],{},"Short screw with little or no compression",[265,412,413],{},"These are general tendencies. The machine maker or the screw supplier sets the actual geometry, and the material supplier can tell you whether a standard screw is suitable.",[278,415,417],{"id":416},"how-to-measure-a-screws-ld-and-compression-ratio","How to measure a screw's L\u002FD and compression ratio",[419,420,421,430,433,436,439,442],"ol",{},[422,423,424,425,429],"li",{},"Pull the screw (see ",[272,426,428],{"href":427},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fremoving-the-screw\u002F","how to remove the screw",") and clean it.",[422,431,432],{},"Measure the flight diameter with a micrometer in a part of the screw with little wear, or use the nominal size from the machine data.",[422,434,435],{},"Measure the flighted length with a tape along the screw.",[422,437,438],{},"Measure the root diameter in the middle of the feed zone and of the metering zone with a caliper or micrometer.",[422,440,441],{},"Work out each channel depth as (flight diameter − root diameter) ÷ 2, then the two ratios.",[422,443,444],{},"Count the flights in each zone: the compression zone is where the root diameter changes.",[278,446,448],{"id":447},"choosing-ld-and-compression-for-a-replacement-screw","Choosing L\u002FD and compression for a replacement screw",[265,450,451],{},"For a replacement, keep the original geometry unless you have a processing problem that a different screw would solve. The L\u002FD is fixed by the barrel: a longer screw needs a longer barrel. Within the same barrel, the screw maker can change the zone lengths, the compression ratio and the mixing sections for a particular material.",[265,453,454,455,459,460,464],{},"The ",[272,456,458],{"href":457},"\u002Fparts\u002Fmc-bc-01\u002F","bimetallic barrel and screw assemblies"," we supply are listed with L\u002FD ratios of 20:1 to 22:1 for screw diameters up to Φ50 mm, and 20:1 to 24:1 for Φ60 mm and Φ70 mm. When you ",[272,461,463],{"href":462},"\u002Frequest-quote\u002F","request a quote",", send the materials you run along with the screw dimensions listed on the screw page.",{"title":466,"searchDepth":21,"depth":21,"links":467},"",[468,469,472,473,474,475],{"id":280,"depth":21,"text":281},{"id":299,"depth":21,"text":300,"children":470},[471],{"id":317,"depth":113,"text":318},{"id":328,"depth":21,"text":329},{"id":357,"depth":21,"text":358},{"id":416,"depth":21,"text":417},{"id":447,"depth":21,"text":448},"What the L\u002FD ratio and the compression ratio of an injection molding screw mean, how to measure and calculate them, typical values, and how they affect the melt.",null,"md",[480,483,486,489],{"question":481,"answer":482},"What is a good L\u002FD ratio for an injection molding screw?","General-purpose injection screws typically have an L\u002FD ratio of about 20:1 to 25:1. Longer screws give a more even melt, shorter ones keep heat-sensitive materials in the barrel for less time; the machine maker sets the ratio for each barrel.",{"question":484,"answer":485},"What is the compression ratio of a screw?","The compression ratio is the channel depth in the feed zone divided by the channel depth in the metering zone. It shows how much the screw compresses the plastic as it melts; general-purpose screws typically have a ratio between about 2:1 and 3:1.",{"question":487,"answer":488},"Does a higher L\u002FD ratio give better melt quality?","Generally a longer screw gives a more uniform melt and better mixing, because the plastic spends longer being heated and sheared. The drawback is a longer residence time, which can degrade heat-sensitive materials.",{"question":490,"answer":491},"Is the L\u002FD ratio of an injection screw the same as an extruder screw?","No. Extrusion screws are usually longer relative to their diameter, because they melt plastic continuously, while an injection screw melts one shot at a time and also moves back and forth.","screw","2026-11-01",{},true,[497],"MC-BC-02","\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio",{"title":260,"description":476},"Screw L\u002FD Ratio and Compression Ratio Explained","L\u002FD ratio","injection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio","2VS-d4CK2KN70c_YU9GYb14Qg91tcAN1Zgm93l4eDgE",[505,509,513,517,521,525,529,533,537,541,545,549,553],{"path":506,"title":507,"short":508},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew","Injection molding screw: parts, zones and types","Screw",{"path":510,"title":511,"short":512},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel","Injection molding machine barrel: construction, zones and wear","Barrel",{"path":514,"title":515,"short":516},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring","Check ring (non-return valve) of an injection molding screw","Check ring",{"path":518,"title":519,"short":520},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip","Screw tip of an injection molding machine: types and removal","Screw tip",{"path":522,"title":523,"short":524},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle","Injection molding machine nozzle: tip, size and design","Nozzle",{"path":526,"title":527,"short":528},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshut-off-nozzle","Shut-off nozzle for injection molding: types and uses","Shut-off nozzle",{"path":530,"title":531,"short":532},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle-filter","Injection molding nozzle filter: types, use and cleaning","Nozzle filter",{"path":534,"title":535,"short":536},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel-head","Barrel head (front flange) of an injection molding machine","Barrel head",{"path":538,"title":539,"short":540},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fhopper-and-feed-throat","Hopper and feed throat of an injection molding machine","Hopper and feed throat",{"path":542,"title":543,"short":544},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel","Bimetallic barrel and screw for injection molding machines","Bimetallic barrel",{"path":546,"title":547,"short":548},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fback-pressure","Back pressure in injection molding: what it does and how to set it","Back pressure",{"path":550,"title":551,"short":552},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size","Shot size calculation for injection molding machines","Shot size calculation",{"path":554,"title":555,"short":556},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fremoving-the-screw","How to remove the screw from an injection molding machine","Removing the screw",{"diagram":239},{"diagram":559},{"title":560,"description":561,"base":562,"labels":573,"items":584},"Parts of the injection unit","Section through an injection unit: nozzle, barrel front flange, barrel, screw with its feed, compression and metering zones, screw tip and check ring, heater bands, hopper throat and injection cylinder, numbered.",{"solid":563,"line":565},[564],"M470 118h14v104h-14z",[566,567,568,569,570,571,572],"M484 124L520 124","M484 216L520 216","M142 212L466 212","M142 207L142 217","M240 207L240 217","M340 207L340 217","M466 207L466 217",[574,578,581],{"x":575,"y":576,"text":577},191,228,"METERING",{"x":579,"y":576,"text":580},290,"COMPRESSION",{"x":582,"y":576,"text":583},403,"FEED",[585,600,617,632,661,674,698,711],{"id":586,"name":524,"role":587,"parts":588,"marker":590,"shapes":594},"nozzle","Screws into the front of the barrel and seals against the mold’s sprue bushing. The melt passes through it on every shot.",[589],"MC-BC-07",[591,592,591,593],52,24,156,{"solid":595,"hidden":598},[596,597],"M32 166L50 158L50 182L32 174Z","M52 156h36a2 2 0 0 1 2 2v24a2 2 0 0 1 -2 2h-36a2 2 0 0 1 -2 -2v-24a2 2 0 0 1 2 -2z",[599],"M34 170L88 170",{"id":601,"name":602,"role":603,"parts":604,"marker":606,"shapes":609},"front-flange","Barrel front flange","Also called the front head or end cap. It closes the front of the barrel and holds the nozzle.",[605],"MC-BC-08",[607,592,607,608],98,144,{"solid":610,"line":612,"hidden":615},[611],"M90 144h16a2 2 0 0 1 2 2v48a2 2 0 0 1 -2 2h-16a2 2 0 0 1 -2 -2v-48a2 2 0 0 1 2 -2z",[613,614],"M95.5 151a2.5 2.5 0 1 0 5 0a2.5 2.5 0 1 0 -5 0z","M95.5 189a2.5 2.5 0 1 0 5 0a2.5 2.5 0 1 0 -5 0z",[616],"M90 170L108 170",{"id":618,"name":512,"role":619,"parts":620,"marker":623,"shapes":626},"barrel","Thick steel tube the screw turns in. Bimetallic barrels have a hard alloy lining that resists wear from glass-filled and abrasive plastics.",[621,622],"MC-BC-01","MC-SB-01",[624,592,624,625],188,146,{"solid":627,"line":629},[628],"M108 146h362v48h-362z",[630,631],"M108 156L470 156","M108 184L470 184",{"id":492,"name":508,"role":633,"parts":634,"marker":635,"shapes":640},"Melts and meters the plastic. Its flights are deep in the feed zone, get shallower through the compression zone and stay shallow in the metering zone.",[497],[636,637,638,639],230,336,232,178,{"solid":641,"line":644},[642,643],"M142 162L240 162L340 166L486 166L486 174L340 174L240 178L142 178Z","M488 162h30a2 2 0 0 1 2 2v12a2 2 0 0 1 -2 2h-30a2 2 0 0 1 -2 -2v-12a2 2 0 0 1 2 -2z",[645,646,647,648,649,650,651,652,653,654,655,656,657,658,659,660],"M148 157L156 183","M168 157L176 183","M188 157L196 183","M208 157L216 183","M228 157L236 183","M248 157L256 183","M268 157L276 183","M288 157L296 183","M308 157L316 183","M328 157L336 183","M348 157L356 183","M368 157L376 183","M388 157L396 183","M408 157L416 183","M428 157L436 183","M448 157L456 183",{"id":662,"name":663,"role":664,"marker":665,"shapes":669},"screw-tip","Screw tip and check ring","A non-return valve on the front of the screw. The ring lets melt pass while the screw turns and seals when it injects, so the shot does not flow back.",[666,637,667,668],122,128,183,{"solid":670},[671,672,673],"M110 170L122 163L132 163L132 177L122 177Z","M125 157h8a1 1 0 0 1 1 1v24a1 1 0 0 1 -1 1h-8a1 1 0 0 1 -1 -1v-24a1 1 0 0 1 1 -1z","M134 159h8v22h-8z",{"id":675,"name":676,"role":677,"subcategory":28,"marker":678,"shapes":682},"heater-bands","Heater bands","Bands around the barrel and nozzle that heat the plastic to its processing temperature, each zone controlled by its own thermocouple.",[679,592,680,681],330,313,138,{"solid":683},[684,685,686,687,688,689,690,691,692,693,694,695,696,697],"M152 138h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M152 194h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M202 138h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M202 194h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M252 138h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M252 194h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M302 138h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M302 194h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M352 138h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M352 194h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M402 138h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M402 194h22a2 2 0 0 1 2 2v4a2 2 0 0 1 -2 2h-22a2 2 0 0 1 -2 -2v-4a2 2 0 0 1 2 -2z","M58 150h20a2 2 0 0 1 2 2v2a2 2 0 0 1 -2 2h-20a2 2 0 0 1 -2 -2v-2a2 2 0 0 1 2 -2z","M58 184h20a2 2 0 0 1 2 2v2a2 2 0 0 1 -2 2h-20a2 2 0 0 1 -2 -2v-2a2 2 0 0 1 2 -2z",{"id":699,"name":540,"role":700,"marker":701,"shapes":704},"feed-throat","Pellets drop from the hopper through the feed throat into the screw. The throat is usually water-cooled so the pellets do not melt and stick before the screw.",[702,592,702,703],446,62,{"solid":705,"hidden":708},[706,707],"M410 62L482 62L462 110L430 110Z","M434 110h24v36h-24z",[709,710],"M434 146L434 156","M458 146L458 156",{"id":712,"name":713,"role":714,"parts":715,"subcategory":72,"marker":717,"shapes":721},"injection-cylinder","Injection cylinder","Hydraulic cylinder that drives the screw forward to inject and holds pressure while the part sets. Its seals are wear parts.",[716],"MC-BC-06",[718,592,719,720],556,560,132,{"solid":722,"hidden":728},[723,724,725,726,727],"M520 128h8v84h-8z","M528 132h62v76h-62z","M590 128h8v84h-8z","M540 124h10v8h-10z","M570 124h10v8h-10z",[729,730],"M548 136h10v68h-10z","M528 170L548 170",[732],{"partNumber":497,"name":733,"subcategory":67,"subcategoryName":68,"shortDescription":734,"image":735,"inStock":495,"zone":232,"compatibleMachines":736},"Injection Screw","Replacement injection screw for injection molding machine plasticizing unit.","\u002Fpart-images\u002FMC\u002FMC-BC-01\u002FMC-BC-02\u002Ffront.jpg",[737,738],"Haitian MA Series","Haitian MA II Series",1793548981228]