[{"data":1,"prerenderedAt":737},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring:*":258,"guides:topics:barrel-screw:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring:path,title,short":497,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw:diagram":550,"diagram:id:injection-unit":551,"catalog:parts::MC-BC-02,MC-GMP-01":723},{"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":468,"diagram":469,"extension":470,"faq":471,"item":484,"lastModified":485,"meta":486,"navigation":487,"order":113,"parts":488,"path":491,"seo":492,"seoTitle":493,"short":494,"stem":495,"__hash__":496},"guides\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring.md","Check ring (non-return valve) of an injection molding screw",{"type":262,"value":263,"toc":460},"minimark",[264,273,276,281,298,320,323,327,358,361,365,391,395,422,435,439,453],[265,266,267,268,272],"p",{},"The check ring is the sliding ring on the screw tip of an injection molding machine that works as a ",[269,270,271],"strong",{},"non-return valve"," (also called a check valve or ring check valve). It lets the melt flow forward while the screw turns, then seals when the screw injects, so the shot goes into the mold instead of flowing back along the flights. A worn ring lets melt leak back, which shows as an unstable cushion and varying shots.",[265,274,275],{},"The screw tip and check ring are item 5 in the drawing.",[277,278,280],"h2",{"id":279},"how-the-check-ring-works","How the check ring works",[265,282,283,284,289,290,293,294,297],{},"The non-return valve has three parts: the ",[285,286,288],"a",{"href":287},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip\u002F","screw tip",", which screws into the front of the screw; the ",[269,291,292],{},"check ring",", a hardened ring that can slide a short distance along the tip; and the ",[269,295,296],{},"seat ring"," (check seat) behind it.",[299,300,301,308,314],"ul",{},[302,303,304,307],"li",{},[269,305,306],{},"While the screw turns (plasticizing):"," melt carried by the flights pushes the ring forward against the tip's wings. Melt flows between the ring and the tip into the space in front of the screw.",[302,309,310,313],{},[269,311,312],{},"When the screw injects:"," the pressure in front of the screw pushes the ring backward onto the seat ring. The valve closes, and the screw pushes the melt into the mold like a plunger.",[302,315,316,319],{},[269,317,318],{},"During hold pressure:"," the ring stays closed, so the screw can keep packing the part.",[265,321,322],{},"Because the ring closes only when it is pushed back, a little melt flows backward at the start of every injection before it seats. A worn or sticking ring lets much more flow back, and that leak shows up in the cushion.",[277,324,326],{"id":325},"signs-of-a-worn-or-damaged-check-ring","Signs of a worn or damaged check ring",[299,328,329,336,343,349,355],{},[302,330,331,332,335],{},"The ",[269,333,334],{},"cushion"," varies from shot to shot, or the screw bottoms out.",[302,337,338,339,342],{},"The screw ",[269,340,341],{},"drifts forward"," during hold pressure while the mold is full.",[302,344,345,348],{},[269,346,347],{},"Short shots"," or part weight variation that changing the process does not fix.",[302,350,351,354],{},[269,352,353],{},"Longer injection time"," at the same speed setting.",[302,356,357],{},"Recovery is normal but the shot is inconsistent: the screw melts the plastic but cannot hold it.",[265,359,360],{},"A cracked ring or a broken tip can also leave metal fragments in parts, which is a reason to stop the machine immediately.",[277,362,364],{"id":363},"why-check-rings-wear","Why check rings wear",[299,366,367,373,379,385],{},[302,368,369,372],{},[269,370,371],{},"Abrasive fillers"," such as glass fiber and minerals wear the ring's sealing faces and its outside diameter.",[302,374,375,378],{},[269,376,377],{},"Corrosive materials"," attack the steel.",[302,380,381,384],{},[269,382,383],{},"Cold starts",": turning or injecting before the barrel has heated through puts high loads on the tip and ring.",[302,386,387,390],{},[269,388,389],{},"Barrel wear",": the ring's outside diameter seals against the barrel bore, so a worn barrel leaks even with a new ring.",[277,392,394],{"id":393},"inspecting-and-replacing-the-check-ring","Inspecting and replacing the check ring",[396,397,398,401,404,416,419],"ol",{},[302,399,400],{},"Heat the barrel to processing temperature, let it soak, and purge it empty.",[302,402,403],{},"Remove the nozzle and the barrel head (front flange), then, in manual mode at low speed and pressure, push the screw forward to expose the tip.",[302,405,406,407,411,412,415],{},"Unscrew the tip with a ",[285,408,410],{"href":409},"\u002Fparts\u002Fmc-gmp-01\u002F","screw head wrench"," while it is hot. Most screw tips have a ",[269,413,414],{},"left-hand thread",", so check before applying force.",[302,417,418],{},"Clean off the plastic and inspect the ring, seat and tip for scoring, chipped edges, cracks and wear on the sealing faces.",[302,420,421],{},"Replace the tip, ring and seat as a set, coat the thread with high-temperature anti-seize compound, and tighten to the torque in the machine manual.",[265,423,424,425,429,430,434],{},"If the ring is worn, measure the barrel bore and the ",[285,426,428],{"href":427},"\u002Fparts\u002Fmc-bc-02\u002F","screw"," flights as well: our guide to ",[285,431,433],{"href":432},"\u002Fblog\u002Fmeasuring-barrel-screw-wear-injection-molding\u002F","measuring barrel and screw wear"," explains how.",[277,436,438],{"id":437},"what-to-send-for-a-replacement","What to send for a replacement",[396,440,441,444,447,450],{},[302,442,443],{},"The machine brand and model, and the screw diameter.",[302,445,446],{},"The tip thread size and hand.",[302,448,449],{},"The outside and inside diameters and the length of the ring, if you can measure them.",[302,451,452],{},"Photos of the old tip, ring and seat.",[265,454,331,455,459],{},[285,456,458],{"href":457},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002F","barrel and screw guide"," shows how the check ring fits with the rest of the plasticizing unit.",{"title":461,"searchDepth":21,"depth":21,"links":462},"",[463,464,465,466,467],{"id":279,"depth":21,"text":280},{"id":325,"depth":21,"text":326},{"id":363,"depth":21,"text":364},{"id":393,"depth":21,"text":394},{"id":437,"depth":21,"text":438},"What the check ring (non-return valve) on an injection molding screw does, how it opens and seals, the signs of a worn ring, and how to replace it.",null,"md",[472,475,478,481],{"question":473,"answer":474},"What is a check ring in injection molding?","A check ring is the sliding ring on the screw tip of an injection molding machine. It works as a non-return valve: it lets melt flow forward while the screw turns, and seals when the screw injects so the melt goes into the mold instead of back along the screw.",{"question":476,"answer":477},"What are the symptoms of a worn check ring?","A cushion that changes from shot to shot or runs to zero, the screw drifting forward during hold pressure, short shots and shot weight variation, and longer injection times at the same settings.",{"question":479,"answer":480},"How often should a check ring be replaced?","There is no fixed interval. It depends on the material, fillers, cycle count and temperature. Check it whenever the cushion becomes unstable, and inspect it each time the screw is pulled.",{"question":482,"answer":483},"Can I replace the check ring without replacing the screw?","Yes. The check ring, seat ring and screw tip are separate wear parts. Replace them as a set so the sealing faces match, and inspect the screw flights while the screw is out.","screw-tip","2026-11-01",{},true,[489,490],"MC-GMP-01","MC-BC-02","\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring",{"title":260,"description":468},"Check Ring in Injection Molding: Function, Wear, Replacement","Check ring","injection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring","P6KBTSgT12AEANU0BOmK6rCxWoLKMwxGpTOS3zZoNTY",[498,502,506,510,514,518,522,526,530,534,538,542,546],{"path":499,"title":500,"short":501},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew","Injection molding screw: parts, zones and types","Screw",{"path":503,"title":504,"short":505},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel","Injection molding machine barrel: construction, zones and wear","Barrel",{"path":507,"title":508,"short":509},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip","Screw tip of an injection molding machine: types and removal","Screw tip",{"path":511,"title":512,"short":513},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle","Injection molding machine nozzle: tip, size and design","Nozzle",{"path":515,"title":516,"short":517},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshut-off-nozzle","Shut-off nozzle for injection molding: types and uses","Shut-off nozzle",{"path":519,"title":520,"short":521},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle-filter","Injection molding nozzle filter: types, use and cleaning","Nozzle filter",{"path":523,"title":524,"short":525},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel-head","Barrel head (front flange) of an injection molding machine","Barrel head",{"path":527,"title":528,"short":529},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fhopper-and-feed-throat","Hopper and feed throat of an injection molding machine","Hopper and feed throat",{"path":531,"title":532,"short":533},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel","Bimetallic barrel and screw for injection molding machines","Bimetallic barrel",{"path":535,"title":536,"short":537},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio","Screw L\u002FD ratio and compression ratio in injection molding","L\u002FD ratio",{"path":539,"title":540,"short":541},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fback-pressure","Back pressure in injection molding: what it does and how to set it","Back pressure",{"path":543,"title":544,"short":545},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size","Shot size calculation for injection molding machines","Shot size calculation",{"path":547,"title":548,"short":549},"\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":552},{"title":553,"description":554,"base":555,"labels":566,"items":577},"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":556,"line":558},[557],"M470 118h14v104h-14z",[559,560,561,562,563,564,565],"M484 124L520 124","M484 216L520 216","M142 212L466 212","M142 207L142 217","M240 207L240 217","M340 207L340 217","M466 207L466 217",[567,571,574],{"x":568,"y":569,"text":570},191,228,"METERING",{"x":572,"y":569,"text":573},290,"COMPRESSION",{"x":575,"y":569,"text":576},403,"FEED",[578,593,610,625,654,666,690,703],{"id":579,"name":513,"role":580,"parts":581,"marker":583,"shapes":587},"nozzle","Screws into the front of the barrel and seals against the mold’s sprue bushing. The melt passes through it on every shot.",[582],"MC-BC-07",[584,585,584,586],52,24,156,{"solid":588,"hidden":591},[589,590],"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",[592],"M34 170L88 170",{"id":594,"name":595,"role":596,"parts":597,"marker":599,"shapes":602},"front-flange","Barrel front flange","Also called the front head or end cap. It closes the front of the barrel and holds the nozzle.",[598],"MC-BC-08",[600,585,600,601],98,144,{"solid":603,"line":605,"hidden":608},[604],"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",[606,607],"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",[609],"M90 170L108 170",{"id":611,"name":505,"role":612,"parts":613,"marker":616,"shapes":619},"barrel","Thick steel tube the screw turns in. Bimetallic barrels have a hard alloy lining that resists wear from glass-filled and abrasive plastics.",[614,615],"MC-BC-01","MC-SB-01",[617,585,617,618],188,146,{"solid":620,"line":622},[621],"M108 146h362v48h-362z",[623,624],"M108 156L470 156","M108 184L470 184",{"id":428,"name":501,"role":626,"parts":627,"marker":628,"shapes":633},"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.",[490],[629,630,631,632],230,336,232,178,{"solid":634,"line":637},[635,636],"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",[638,639,640,641,642,643,644,645,646,647,648,649,650,651,652,653],"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":484,"name":655,"role":656,"marker":657,"shapes":661},"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.",[658,630,659,660],122,128,183,{"solid":662},[663,664,665],"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":667,"name":668,"role":669,"subcategory":28,"marker":670,"shapes":674},"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.",[671,585,672,673],330,313,138,{"solid":675},[676,677,678,679,680,681,682,683,684,685,686,687,688,689],"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":691,"name":529,"role":692,"marker":693,"shapes":696},"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.",[694,585,694,695],446,62,{"solid":697,"hidden":700},[698,699],"M410 62L482 62L462 110L430 110Z","M434 110h24v36h-24z",[701,702],"M434 146L434 156","M458 146L458 156",{"id":704,"name":705,"role":706,"parts":707,"subcategory":72,"marker":709,"shapes":713},"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.",[708],"MC-BC-06",[710,585,711,712],556,560,132,{"solid":714,"hidden":720},[715,716,717,718,719],"M520 128h8v84h-8z","M528 132h62v76h-62z","M590 128h8v84h-8z","M540 124h10v8h-10z","M570 124h10v8h-10z",[721,722],"M548 136h10v68h-10z","M528 170L548 170",[724,731],{"partNumber":490,"name":725,"subcategory":67,"subcategoryName":68,"shortDescription":726,"image":727,"inStock":487,"zone":232,"compatibleMachines":728},"Injection Screw","Replacement injection screw for injection molding machine plasticizing unit.","\u002Fpart-images\u002FMC\u002FMC-BC-01\u002FMC-BC-02\u002Ffront.jpg",[729,730],"Haitian MA Series","Haitian MA II Series",{"partNumber":489,"name":732,"subcategory":98,"subcategoryName":733,"shortDescription":734,"inStock":487,"zone":232,"compatibleMachines":735},"Screw Head Wrench (3-Prong \u002F 4-Prong \u002F 6-Prong)","Maintenance Tools","Specialist screw head wrench for removing injection molding machine screw heads.",[729,730,736],"Yizumi A5 Series",1793548980895]