[{"data":1,"prerenderedAt":791},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip:*":258,"guides:topics:barrel-screw:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip:path,title,short":555,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw:diagram":608,"diagram:id:injection-unit":609,"catalog:parts::MC-GMP-01":782},{"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":527,"diagram":528,"extension":529,"faq":530,"item":543,"lastModified":544,"meta":545,"navigation":546,"order":16,"parts":547,"path":549,"seo":550,"seoTitle":551,"short":552,"stem":553,"__hash__":554},"guides\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip.md","Screw tip of an injection molding machine: types and removal",{"type":262,"value":263,"toc":518},"minimark",[264,268,282,287,315,319,375,378,382,416,419,423,461,469,473,490,494,511],[265,266,267],"p",{},"The screw tip, also called the screw head, is the hardened, pointed part screwed into the front of the injection molding machine screw. It guides the melt into the front of the barrel and, on most machines, carries the non-return valve: the check ring slides on it and seals against the seat ring behind it. It is a wear part, replaced together with the ring and seat, and it has to come off whenever the valve is inspected or replaced.",[265,269,270,271,276,277,281],{},"The screw tip and check ring are item 5 in the drawing. For how the valve opens and seals, see the ",[272,273,275],"a",{"href":274},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring\u002F","check ring guide","; for the rest of the plasticizing unit, see the ",[272,278,280],{"href":279},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002F","barrel and screw guide",".",[283,284,286],"h2",{"id":285},"where-the-screw-tip-sits-and-what-it-does","Where the screw tip sits and what it does",[288,289,290,298,304],"ul",{},[291,292,293,297],"li",{},[294,295,296],"strong",{},"Thread."," The tip's shank screws into the front end of the screw. On a ring-type valve it passes through the check ring and the seat ring, and its shoulder clamps the seat ring against the front face of the screw.",[291,299,300,303],{},[294,301,302],{},"Flutes and wings."," The front part of the tip has wings with flutes between them. The wings stop the check ring in its open position, and the melt flows forward through the flutes.",[291,305,306,309,310,314],{},[294,307,308],{},"Cone."," The pointed front is shaped to match the inside of the ",[272,311,313],{"href":312},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel-head\u002F","barrel head",", so that at the end of injection the screw pushes out almost all the melt and little is left behind to degrade.",[283,316,318],{"id":317},"types-of-screw-tip","Types of screw tip",[320,321,322,338],"table",{},[323,324,325],"thead",{},[326,327,328,332,335],"tr",{},[329,330,331],"th",{},"Type",[329,333,334],{},"How it works",[329,336,337],{},"Typical use",[339,340,341,353,364],"tbody",{},[326,342,343,347,350],{},[344,345,346],"td",{},"Ring-type (sliding ring)",[344,348,349],{},"A check ring slides on the tip and seals on the seat ring",[344,351,352],{},"Most materials; the standard design",[326,354,355,358,361],{},[344,356,357],{},"Ball check",[344,359,360],{},"A ball inside the tip lifts off its seat to let melt through and is pushed back onto it to seal",[344,362,363],{},"Some machines and applications; more restriction to flow than a ring",[326,365,366,369,372],{},[344,367,368],{},"Free-flow (smear) tip",[344,370,371],{},"No valve; the melt can flow back during injection",[344,373,374],{},"Heat-sensitive materials such as rigid PVC",[265,376,377],{},"Tips are also made in different steels and with hard coatings for abrasive or corrosive materials. Fit the type and material the screw was designed for, unless the machine maker or the screw supplier recommends a change.",[283,379,381],{"id":380},"signs-of-a-worn-or-damaged-screw-tip","Signs of a worn or damaged screw tip",[288,383,384,391,397,403,410],{},[291,385,386,387,390],{},"The ",[294,388,389],{},"cushion"," varies or runs to zero, usually together with a worn check ring.",[291,392,386,393,396],{},[294,394,395],{},"wings are worn or rounded",", or the shoulder that holds the seat ring is damaged.",[291,398,399,402],{},[294,400,401],{},"Black specks"," from degraded plastic trapped between the tip, the seat ring and the screw face.",[291,404,405,406,409],{},"A ",[294,407,408],{},"cracked or broken tip",": a sudden loss of cushion, metal in parts, or a fragment blocking the nozzle. Stop the machine at once.",[291,411,405,412,415],{},[294,413,414],{},"seized or damaged thread"," found when you try to remove it.",[265,417,418],{},"The usual causes are turning or injecting before the barrel has heated through, abrasive and corrosive materials, a tip that was not tightened to the specified torque, and mismatched parts from different sets.",[283,420,422],{"id":421},"how-to-remove-a-screw-tip","How to remove a screw tip",[424,425,426,429,437,440,443,451,458],"ol",{},[291,427,428],{},"Heat the barrel to processing temperature, let it soak, and purge it empty.",[291,430,431,432,436],{},"Retract the injection unit and remove the ",[272,433,435],{"href":434},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle\u002F","nozzle"," and the barrel head.",[291,438,439],{},"In manual mode, at low speed and pressure, push the screw forward until the tip is exposed.",[291,441,442],{},"Make sure the screw cannot turn while you loosen the tip; follow the method in the machine manual.",[291,444,445,446,450],{},"Fit a ",[272,447,449],{"href":448},"\u002Fparts\u002Fmc-gmp-01\u002F","screw head wrench"," that matches the tip. The wrenches we supply come in 3-prong, 4-prong and 6-prong versions for different tip designs.",[291,452,453,454,457],{},"Remove the tip while it is hot. Most screw tips have a ",[294,455,456],{},"left-hand thread",", so check before applying force.",[291,459,460],{},"Slide off the check ring and the seat ring, and clean all parts while they are warm with brass tools.",[265,462,463,464,468],{},"If the tip will not move, keep it at temperature longer rather than forcing it. Do not heat a hardened tip with a torch: the heat can soften it and damage the screw thread. On some machines it is easier to pull the screw first and remove the tip on the bench, as described in ",[272,465,467],{"href":466},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fremoving-the-screw\u002F","how to remove the screw","; do it before the tip cools.",[283,470,472],{"id":471},"refitting-the-screw-tip","Refitting the screw tip",[424,474,475,478,481,484,487],{},[291,476,477],{},"Clean the thread in the screw and the face the seat ring sits against. Any plastic left there stops the parts seating and can let the tip loosen.",[291,479,480],{},"Fit a matching set: seat ring, check ring and tip. Make sure the check ring slides freely on the tip.",[291,482,483],{},"Coat the thread with a high-temperature anti-seize compound. Keep it off the sealing faces.",[291,485,486],{},"Tighten the tip to the torque in the machine manual, with the barrel at the temperature the manual specifies.",[291,488,489],{},"Refit the barrel head and the nozzle, heat the barrel and let it soak before turning the screw.",[283,491,493],{"id":492},"what-to-send-for-a-replacement-screw-tip","What to send for a replacement screw tip",[424,495,496,499,502,505,508],{},[291,497,498],{},"The machine model and the screw diameter.",[291,500,501],{},"The thread size and hand, and the overall length of the tip.",[291,503,504],{},"The type (ring, ball or free-flow) and the number of flutes.",[291,506,507],{},"The outside diameter, inside diameter and length of the check ring and seat ring, if you can measure them.",[291,509,510],{},"Photos of the tip, ring and seat, and the materials you run.",[265,512,513,517],{},[272,514,516],{"href":515},"\u002Frequest-quote\u002F","Request a quote"," with these details. The tip, ring and seat are quoted as a set, because their sealing faces must match.",{"title":519,"searchDepth":21,"depth":21,"links":520},"",[521,522,523,524,525,526],{"id":285,"depth":21,"text":286},{"id":317,"depth":21,"text":318},{"id":380,"depth":21,"text":381},{"id":421,"depth":21,"text":422},{"id":471,"depth":21,"text":472},{"id":492,"depth":21,"text":493},"What the screw tip of an injection molding machine does, ring, ball and free-flow tip types, signs of wear, and how to remove and refit a screw tip safely.",null,"md",[531,534,537,540],{"question":532,"answer":533},"Which way do you unscrew an injection molding screw tip?","Most screw tips have a left-hand thread, so they loosen when turned clockwise as you face the tip. Check the machine manual or the tip itself before applying force, because some tips have a right-hand thread.",{"question":535,"answer":536},"Should a screw tip be removed hot or cold?","Hot. Heat the barrel to processing temperature and remove the tip while the plastic around it is still molten. Cold plastic in the thread and between the faces locks the tip in place.",{"question":538,"answer":539},"What is the difference between the screw tip and the check ring?","The screw tip is the pointed part screwed into the front of the screw. The check ring is the sliding ring that sits around it and works as the non-return valve together with the seat ring. The three parts are normally replaced as a set.",{"question":541,"answer":542},"When is a screw tip without a check ring used?","A free-flow (smear) tip with no valve is used for heat-sensitive materials such as rigid PVC, where any place melt can hang up would let it degrade. The shot is less consistent because some melt flows back during injection.","screw-tip","2026-11-01",{},true,[548],"MC-GMP-01","\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip",{"title":260,"description":527},"Injection Molding Screw Tip: Types, Wear and Removal","Screw tip","injection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip","xKLba3M7m1dTGBGt63aSA2c0CKjNj3lPMzlnszJ5h5c",[556,560,564,568,572,576,580,584,588,592,596,600,604],{"path":557,"title":558,"short":559},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew","Injection molding screw: parts, zones and types","Screw",{"path":561,"title":562,"short":563},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel","Injection molding machine barrel: construction, zones and wear","Barrel",{"path":565,"title":566,"short":567},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring","Check ring (non-return valve) of an injection molding screw","Check ring",{"path":569,"title":570,"short":571},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle","Injection molding machine nozzle: tip, size and design","Nozzle",{"path":573,"title":574,"short":575},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshut-off-nozzle","Shut-off nozzle for injection molding: types and uses","Shut-off nozzle",{"path":577,"title":578,"short":579},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle-filter","Injection molding nozzle filter: types, use and cleaning","Nozzle filter",{"path":581,"title":582,"short":583},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel-head","Barrel head (front flange) of an injection molding machine","Barrel head",{"path":585,"title":586,"short":587},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fhopper-and-feed-throat","Hopper and feed throat of an injection molding machine","Hopper and feed throat",{"path":589,"title":590,"short":591},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel","Bimetallic barrel and screw for injection molding machines","Bimetallic barrel",{"path":593,"title":594,"short":595},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio","Screw L\u002FD ratio and compression ratio in injection molding","L\u002FD ratio",{"path":597,"title":598,"short":599},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fback-pressure","Back pressure in injection molding: what it does and how to set it","Back pressure",{"path":601,"title":602,"short":603},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size","Shot size calculation for injection molding machines","Shot size calculation",{"path":605,"title":606,"short":607},"\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":610},{"title":611,"description":612,"base":613,"labels":624,"items":635},"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":614,"line":616},[615],"M470 118h14v104h-14z",[617,618,619,620,621,622,623],"M484 124L520 124","M484 216L520 216","M142 212L466 212","M142 207L142 217","M240 207L240 217","M340 207L340 217","M466 207L466 217",[625,629,632],{"x":626,"y":627,"text":628},191,228,"METERING",{"x":630,"y":627,"text":631},290,"COMPRESSION",{"x":633,"y":627,"text":634},403,"FEED",[636,650,667,682,713,725,749,762],{"id":435,"name":571,"role":637,"parts":638,"marker":640,"shapes":644},"Screws into the front of the barrel and seals against the mold’s sprue bushing. The melt passes through it on every shot.",[639],"MC-BC-07",[641,642,641,643],52,24,156,{"solid":645,"hidden":648},[646,647],"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",[649],"M34 170L88 170",{"id":651,"name":652,"role":653,"parts":654,"marker":656,"shapes":659},"front-flange","Barrel front flange","Also called the front head or end cap. It closes the front of the barrel and holds the nozzle.",[655],"MC-BC-08",[657,642,657,658],98,144,{"solid":660,"line":662,"hidden":665},[661],"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",[663,664],"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",[666],"M90 170L108 170",{"id":668,"name":563,"role":669,"parts":670,"marker":673,"shapes":676},"barrel","Thick steel tube the screw turns in. Bimetallic barrels have a hard alloy lining that resists wear from glass-filled and abrasive plastics.",[671,672],"MC-BC-01","MC-SB-01",[674,642,674,675],188,146,{"solid":677,"line":679},[678],"M108 146h362v48h-362z",[680,681],"M108 156L470 156","M108 184L470 184",{"id":683,"name":559,"role":684,"parts":685,"marker":687,"shapes":692},"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.",[686],"MC-BC-02",[688,689,690,691],230,336,232,178,{"solid":693,"line":696},[694,695],"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",[697,698,699,700,701,702,703,704,705,706,707,708,709,710,711,712],"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":543,"name":714,"role":715,"marker":716,"shapes":720},"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.",[717,689,718,719],122,128,183,{"solid":721},[722,723,724],"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":726,"name":727,"role":728,"subcategory":28,"marker":729,"shapes":733},"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.",[730,642,731,732],330,313,138,{"solid":734},[735,736,737,738,739,740,741,742,743,744,745,746,747,748],"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":750,"name":587,"role":751,"marker":752,"shapes":755},"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.",[753,642,753,754],446,62,{"solid":756,"hidden":759},[757,758],"M410 62L482 62L462 110L430 110Z","M434 110h24v36h-24z",[760,761],"M434 146L434 156","M458 146L458 156",{"id":763,"name":764,"role":765,"parts":766,"subcategory":72,"marker":768,"shapes":772},"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.",[767],"MC-BC-06",[769,642,770,771],556,560,132,{"solid":773,"hidden":779},[774,775,776,777,778],"M520 128h8v84h-8z","M528 132h62v76h-62z","M590 128h8v84h-8z","M540 124h10v8h-10z","M570 124h10v8h-10z",[780,781],"M548 136h10v68h-10z","M528 170L548 170",[783],{"partNumber":548,"name":784,"subcategory":98,"subcategoryName":785,"shortDescription":786,"inStock":546,"zone":232,"compatibleMachines":787},"Screw Head Wrench (3-Prong \u002F 4-Prong \u002F 6-Prong)","Maintenance Tools","Specialist screw head wrench for removing injection molding machine screw heads.",[788,789,790],"Haitian MA Series","Haitian MA II Series","Yizumi A5 Series",1793548980942]