[{"data":1,"prerenderedAt":797},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel:*":258,"guides:topics:barrel-screw:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel:path,title,short":560,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw:diagram":613,"diagram:id:injection-unit":614,"catalog:parts::MC-BC-01":787},{"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":533,"diagram":534,"extension":535,"faq":536,"item":549,"lastModified":550,"meta":551,"navigation":552,"order":171,"parts":553,"path":555,"seo":556,"seoTitle":557,"short":366,"stem":558,"__hash__":559},"guides\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel.md","Bimetallic barrel and screw for injection molding machines",{"type":262,"value":263,"toc":523},"minimark",[264,268,277,282,290,306,314,318,321,342,345,349,426,429,433,440,453,457,474,478,491,494,498,515],[265,266,267],"p",{},"A bimetallic barrel is an injection molding machine barrel whose bore is lined with a layer of wear-resistant alloy that is cast and bonded to a steel outer tube. The steel carries the injection pressure and the alloy liner takes the wear, so the barrel lasts much longer than a nitrided barrel with glass-filled, mineral-filled, flame-retardant or corrosive plastics. A bimetallic barrel and screw assembly pairs it with a matching screw whose flights are hard-faced.",[265,269,270,271,276],{},"The barrel is item 3 in the drawing. For its construction, zones and measurement, see the ",[272,273,275],"a",{"href":274},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel\u002F","barrel guide","; this page covers what changes when the barrel is bimetallic.",[278,279,281],"h2",{"id":280},"how-a-bimetallic-barrel-is-made","How a bimetallic barrel is made",[265,283,284,285,289],{},"The liner is usually made by ",[286,287,288],"strong",{},"centrifugal casting",":",[291,292,293,297,300,303],"ol",{},[294,295,296],"li",{},"A measured charge of the liner alloy is loaded into the bore of a machined steel tube, and the ends are sealed.",[294,298,299],{},"The tube is heated in a furnace until the alloy melts.",[294,301,302],{},"The tube is spun at high speed, which spreads the molten alloy into an even layer around the bore, where it bonds to the steel as it cools.",[294,304,305],{},"The bore is then machined and honed to its finished size and surface.",[265,307,308,309,313],{},"The ",[272,310,312],{"href":311},"\u002Fparts\u002Fmc-bc-01\u002F","bimetallic barrel and screw assemblies"," we supply have a centrifugally cast alloy liner in a 38CrMoAlA steel barrel, with a listed liner hardness of HRC 58–65.",[278,315,317],{"id":316},"liner-alloys","Liner alloys",[265,319,320],{},"Liner alloys fall into a few families, chosen for the material the barrel will run:",[322,323,324,330,336],"ul",{},[294,325,326,329],{},[286,327,328],{},"Iron-based alloys"," are hard and resist abrasion; they suit most filled materials.",[294,331,332,335],{},[286,333,334],{},"Nickel- or cobalt-based alloys"," resist corrosion better, for plastics and additives that release corrosive gases, such as some flame retardants.",[294,337,338,341],{},[286,339,340],{},"Alloys with tungsten carbide"," particles in a nickel-based matrix resist the heaviest abrasion, such as high glass-fiber contents, and abrasion combined with corrosion.",[265,343,344],{},"Ask the barrel maker which alloy suits your materials; one choice rarely covers every case.",[278,346,348],{"id":347},"bimetallic-or-nitrided-barrel","Bimetallic or nitrided barrel",[350,351,352,367],"table",{},[353,354,355],"thead",{},[356,357,358,361,364],"tr",{},[359,360],"th",{},[359,362,363],{},"Nitrided barrel",[359,365,366],{},"Bimetallic barrel",[368,369,370,382,393,404,415],"tbody",{},[356,371,372,376,379],{},[373,374,375],"td",{},"Wear surface",[373,377,378],{},"A thin hardened layer of the barrel steel itself",[373,380,381],{},"A cast liner of wear-resistant alloy, much thicker than a nitrided layer",[356,383,384,387,390],{},[373,385,386],{},"Once the hard layer is worn",[373,388,389],{},"Wear speeds up in the softer steel below",[373,391,392],{},"The liner keeps its properties through its thickness",[356,394,395,398,401],{},[373,396,397],{},"Corrosion resistance",[373,399,400],{},"Limited",[373,402,403],{},"Good with a nickel- or cobalt-based liner",[356,405,406,409,412],{},[373,407,408],{},"Suited to",[373,410,411],{},"Most unfilled plastics",[373,413,414],{},"Glass-filled, mineral-filled, flame-retardant and corrosive plastics",[356,416,417,420,423],{},[373,418,419],{},"Cost",[373,421,422],{},"Lower",[373,424,425],{},"Higher, offset by longer life with abrasive materials",[265,427,428],{},"For unfilled commodity plastics a nitrided barrel is often enough. If you switch a machine to filled or corrosive grades, or if barrels on that machine wear out quickly, a bimetallic barrel is the usual upgrade.",[278,430,432],{"id":431},"bimetallic-screws","Bimetallic screws",[265,434,435,436,439],{},"A ",[286,437,438],{},"bimetallic screw"," has a layer of hard alloy welded or sprayed onto its flight lands, the surfaces that run against the barrel. The rest of the screw is the base steel. Other options for abrasive and corrosive materials are hard coatings over the whole screw and screws made of tool steel.",[265,441,442,443,447,448,452],{},"Choose the screw and the barrel together, so the flight surface and the liner suit each other and the material you run. When both are worn, replacing them as a matched assembly gives the correct clearance from the start. The ",[272,444,446],{"href":445},"\u002Fparts\u002Fmc-bc-02\u002F","injection screws"," we supply come in standard nitrided and bimetallic versions, and the ",[272,449,451],{"href":450},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew\u002F","screw guide"," explains the screw's zones and types.",[278,454,456],{"id":455},"when-a-bimetallic-barrel-is-worth-it","When a bimetallic barrel is worth it",[322,458,459,462,465,468,471],{},[294,460,461],{},"Glass-fiber or mineral-filled plastics.",[294,463,464],{},"Flame-retardant grades and other materials that release corrosive gases when they overheat.",[294,466,467],{},"High loadings of abrasive pigments, such as titanium dioxide.",[294,469,470],{},"Machines that run one demanding material for long periods.",[294,472,473],{},"Barrels that have needed replacing often on the same job.",[278,475,477],{"id":476},"wear-and-inspection","Wear and inspection",[265,479,480,481,485,486,490],{},"A bimetallic liner wears gradually, like a nitrided bore, and is measured the same way: see ",[272,482,484],{"href":483},"\u002Fblog\u002Fmeasuring-barrel-screw-wear-injection-molding\u002F","measuring barrel and screw wear"," and ",[272,487,489],{"href":488},"\u002Fblog\u002Fwhen-to-replace-injection-molding-machine-barrel\u002F","when to replace the barrel",". Also look for cracks, chips or flaking in the liner, especially near the ends.",[265,492,493],{},"The liner is hard but less ductile than steel, so treat the bore with care: clean it with brass tools, never strike it with steel bars, and never turn or inject on plastic that is not fully melted. Once the liner is worn through in places, the barrel wears quickly and should be replaced.",[278,495,497],{"id":496},"what-to-send-for-a-quote","What to send for a quote",[291,499,500,503,506,509,512],{},[294,501,502],{},"The machine brand and model, and the screw diameter.",[294,504,505],{},"The materials you run, with the filler type and content, and any corrosive additives.",[294,507,508],{},"The barrel dimensions listed on the barrel page linked above, or the OEM part number.",[294,510,511],{},"Whether you need the barrel alone or the barrel with a screw, screw tip, check ring and end cap.",[294,513,514],{},"Photos of the old barrel and screw.",[265,516,517,518,522],{},"Our bimetallic assemblies are listed for screw diameters from Φ36 mm to Φ70 mm. ",[272,519,521],{"href":520},"\u002Frequest-quote\u002F","Request a quote"," with the details above.",{"title":524,"searchDepth":21,"depth":21,"links":525},"",[526,527,528,529,530,531,532],{"id":280,"depth":21,"text":281},{"id":316,"depth":21,"text":317},{"id":347,"depth":21,"text":348},{"id":431,"depth":21,"text":432},{"id":455,"depth":21,"text":456},{"id":476,"depth":21,"text":477},{"id":496,"depth":21,"text":497},"What a bimetallic barrel is, how its alloy liner is cast, how it compares with a nitrided barrel, what a bimetallic screw is, and when the upgrade is worth it.",null,"md",[537,540,543,546],{"question":538,"answer":539},"What is a bimetallic barrel?","A bimetallic barrel is a steel barrel whose bore is lined with a layer of wear-resistant alloy, cast and bonded to the steel. The steel carries the pressure and the alloy liner takes the wear.",{"question":541,"answer":542},"How much longer does a bimetallic barrel last than a nitrided one?","There is no fixed figure. It depends on the material, the filler content, the temperatures and the cycle. With abrasive or corrosive materials a bimetallic barrel lasts much longer, because its wear layer is far thicker than a nitrided layer.",{"question":544,"answer":545},"What is a bimetallic screw?","A bimetallic screw is a steel screw whose flight lands carry a welded or sprayed layer of hard, wear-resistant alloy. It is the usual partner for a bimetallic barrel when the material is abrasive.",{"question":547,"answer":548},"Do I need a bimetallic barrel for glass-filled plastics?","For regular production, usually yes. Glass fiber and mineral fillers wear through the thin hardened layer of a nitrided barrel quickly, while a bimetallic liner keeps its wear resistance through its full thickness.","barrel","2026-11-01",{},true,[554],"MC-BC-01","\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel",{"title":260,"description":533},"Bimetallic Barrel and Screw: How They Are Made and Used","injection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel","EH5ijMVYm9J0BOYpQ01pwnJF1s4qplZADPesO6b1eN0",[561,565,569,573,577,581,585,589,593,597,601,605,609],{"path":562,"title":563,"short":564},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew","Injection molding screw: parts, zones and types","Screw",{"path":566,"title":567,"short":568},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel","Injection molding machine barrel: construction, zones and wear","Barrel",{"path":570,"title":571,"short":572},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring","Check ring (non-return valve) of an injection molding screw","Check ring",{"path":574,"title":575,"short":576},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip","Screw tip of an injection molding machine: types and removal","Screw tip",{"path":578,"title":579,"short":580},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle","Injection molding machine nozzle: tip, size and design","Nozzle",{"path":582,"title":583,"short":584},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshut-off-nozzle","Shut-off nozzle for injection molding: types and uses","Shut-off nozzle",{"path":586,"title":587,"short":588},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle-filter","Injection molding nozzle filter: types, use and cleaning","Nozzle filter",{"path":590,"title":591,"short":592},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel-head","Barrel head (front flange) of an injection molding machine","Barrel head",{"path":594,"title":595,"short":596},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fhopper-and-feed-throat","Hopper and feed throat of an injection molding machine","Hopper and feed throat",{"path":598,"title":599,"short":600},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio","Screw L\u002FD ratio and compression ratio in injection molding","L\u002FD ratio",{"path":602,"title":603,"short":604},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fback-pressure","Back pressure in injection molding: what it does and how to set it","Back pressure",{"path":606,"title":607,"short":608},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size","Shot size calculation for injection molding machines","Shot size calculation",{"path":610,"title":611,"short":612},"\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":615},{"title":616,"description":617,"base":618,"labels":629,"items":640},"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":619,"line":621},[620],"M470 118h14v104h-14z",[622,623,624,625,626,627,628],"M484 124L520 124","M484 216L520 216","M142 212L466 212","M142 207L142 217","M240 207L240 217","M340 207L340 217","M466 207L466 217",[630,634,637],{"x":631,"y":632,"text":633},191,228,"METERING",{"x":635,"y":632,"text":636},290,"COMPRESSION",{"x":638,"y":632,"text":639},403,"FEED",[641,656,673,686,717,730,754,767],{"id":642,"name":580,"role":643,"parts":644,"marker":646,"shapes":650},"nozzle","Screws into the front of the barrel and seals against the mold’s sprue bushing. The melt passes through it on every shot.",[645],"MC-BC-07",[647,648,647,649],52,24,156,{"solid":651,"hidden":654},[652,653],"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",[655],"M34 170L88 170",{"id":657,"name":658,"role":659,"parts":660,"marker":662,"shapes":665},"front-flange","Barrel front flange","Also called the front head or end cap. It closes the front of the barrel and holds the nozzle.",[661],"MC-BC-08",[663,648,663,664],98,144,{"solid":666,"line":668,"hidden":671},[667],"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",[669,670],"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",[672],"M90 170L108 170",{"id":549,"name":568,"role":674,"parts":675,"marker":677,"shapes":680},"Thick steel tube the screw turns in. Bimetallic barrels have a hard alloy lining that resists wear from glass-filled and abrasive plastics.",[554,676],"MC-SB-01",[678,648,678,679],188,146,{"solid":681,"line":683},[682],"M108 146h362v48h-362z",[684,685],"M108 156L470 156","M108 184L470 184",{"id":687,"name":564,"role":688,"parts":689,"marker":691,"shapes":696},"screw","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.",[690],"MC-BC-02",[692,693,694,695],230,336,232,178,{"solid":697,"line":700},[698,699],"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",[701,702,703,704,705,706,707,708,709,710,711,712,713,714,715,716],"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":718,"name":719,"role":720,"marker":721,"shapes":725},"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.",[722,693,723,724],122,128,183,{"solid":726},[727,728,729],"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":731,"name":732,"role":733,"subcategory":28,"marker":734,"shapes":738},"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.",[735,648,736,737],330,313,138,{"solid":739},[740,741,742,743,744,745,746,747,748,749,750,751,752,753],"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":755,"name":596,"role":756,"marker":757,"shapes":760},"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.",[758,648,758,759],446,62,{"solid":761,"hidden":764},[762,763],"M410 62L482 62L462 110L430 110Z","M434 110h24v36h-24z",[765,766],"M434 146L434 156","M458 146L458 156",{"id":768,"name":769,"role":770,"parts":771,"subcategory":72,"marker":773,"shapes":777},"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.",[772],"MC-BC-06",[774,648,775,776],556,560,132,{"solid":778,"hidden":784},[779,780,781,782,783],"M520 128h8v84h-8z","M528 132h62v76h-62z","M590 128h8v84h-8z","M540 124h10v8h-10z","M570 124h10v8h-10z",[785,786],"M548 136h10v68h-10z","M528 170L548 170",[788],{"partNumber":554,"name":789,"subcategory":67,"subcategoryName":68,"shortDescription":790,"image":791,"inStock":552,"zone":232,"compatibleMachines":792},"Bimetallic Barrel & Screw Assembly","High-quality bimetallic barrel and screw assembly for plastic injection molding machines.","\u002Fpart-images\u002FMC\u002FMC-BC-01\u002FMC-BC-02\u002Ffront.jpg",[793,794,795,796],"Haitian MA Series","Haitian MA II Series","Haitian Jupiter Series","Yizumi A5 Series",1793548981195]