[{"data":1,"prerenderedAt":615},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fplatens\u002Flocating-ring:*":258,"guides:topics:platens:\u002Finjection-molding-machine-parts\u002Fplatens\u002Flocating-ring:path,title,short":467,"guides:page:\u002Finjection-molding-machine-parts\u002Fplatens:diagram":480,"diagram:id:platen":482,"catalog:parts::MC-JM-04":606},{"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":439,"diagram":440,"extension":441,"faq":442,"item":455,"lastModified":456,"meta":457,"navigation":458,"order":113,"parts":459,"path":461,"seo":462,"seoTitle":463,"short":464,"stem":465,"__hash__":466},"guides\u002Finjection-molding-machine-parts\u002Fplatens\u002Flocating-ring.md","Locating ring in injection molding",{"type":262,"value":263,"toc":429},"minimark",[264,274,279,306,310,313,316,327,335,339,342,349,353,370,374,394,398,412,416],[265,266,267,268,273],"p",{},"A locating ring is the round steel ring on the fixed half of an injection mold that fits into the center bore of the machine's stationary platen. It centers the mold on the platen, so that the mold's sprue bushing lines up with the machine nozzle. The locating ring locates the mold but does not hold it: that is the job of the ",[269,270,272],"a",{"href":271},"\u002Finjection-molding-machine-parts\u002Fplatens\u002Fmold-clamps\u002F","mold clamps",".",[275,276,278],"h2",{"id":277},"where-the-locating-ring-sits","Where the locating ring sits",[280,281,282,290,296],"ul",{},[283,284,285,289],"li",{},[286,287,288],"strong",{},"On the mold:"," the ring is screwed to the outside of the mold's fixed clamping plate, around the sprue bushing. On many molds it also holds the sprue bushing in place.",[283,291,292,295],{},[286,293,294],{},"In the platen:"," the center bore of the stationary platen, highlighted in the drawing, receives the ring. Some machines have a replaceable centering ring or insert in this bore, so molds with different ring sizes can be used.",[283,297,298,301,302,273],{},[286,299,300],{},"On the moving side:"," some molds have a second locating ring on the ejector half that fits the center bore of the moving platen. On most machines that bore is used by the central ",[269,303,305],{"href":304},"\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-rod\u002F","ejector rod",[275,307,309],{"id":308},"how-the-locating-ring-works","How the locating ring works",[265,311,312],{},"The ring's outside diameter is a close sliding fit in the platen bore. When the mold is hung in the machine, the ring is guided into the bore and the fixed half is brought flat against the platen face before the clamps are tightened. The bore is concentric with the nozzle, so the sprue bushing ends up on the nozzle axis.",[265,314,315],{},"This matters on every shot. The nozzle tip presses against the seat of the sprue bushing, and the two only seal if they meet squarely and on center. An off-center mold leads to:",[280,317,318,321,324],{},[283,319,320],{},"melt leaking between the nozzle and the sprue bushing and building up as a lump of plastic around the nozzle;",[283,322,323],{},"a sprue that sticks in the bushing, because the nozzle orifice does not line up with the sprue opening;",[283,325,326],{},"damage to the nozzle tip and the sprue bushing seat.",[265,328,329,330,334],{},"The ",[269,331,333],{"href":332},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle\u002F","nozzle guide"," explains how the nozzle radius and orifice have to match the sprue bushing.",[275,336,338],{"id":337},"sizes-and-fit","Sizes and fit",[265,340,341],{},"There is no single locating ring size. The machine's data sheet gives the diameter of the stationary platen's center bore, and the mold's ring must match it with a small clearance, so it slides in without force. Mold component suppliers make locating rings in standard metric and inch diameters, and the size is usually given on the mold drawing. When a mold moves to another machine, check the ring diameter first: a ring that is too large will not go in, and one that is too small leaves the mold off center.",[265,343,329,344,348],{},[269,345,347],{"href":346},"\u002Fparts\u002Fmc-jm-04\u002F","mold clamping plate \u002F locating ring"," we supply is made of 45# steel, black oxide or zinc-plated, and is listed for Haitian MA and MA II series machines.",[275,350,352],{"id":351},"signs-of-a-problem","Signs of a problem",[280,354,355,358,361,364,367],{},[283,356,357],{},"The mold will not go into the bore: wrong size, burrs on the ring or in the bore, or plastic and dirt in the bore.",[283,359,360],{},"Plastic leaking at the nozzle, or a sticking sprue, after a mold change.",[283,362,363],{},"A bent, dented or burred ring, often from a mold that was dropped or swung into the platen.",[283,365,366],{},"Loose ring screws.",[283,368,369],{},"A worn or damaged platen bore, or an injection unit that is no longer on center with the platen.",[275,371,373],{"id":372},"checking-nozzle-alignment","Checking nozzle alignment",[375,376,377,380,383,386],"ol",{},[283,378,379],{},"Follow your setting procedure and the machine's safety instructions: the nozzle and sprue bushing are hot.",[283,381,382],{},"With the mold clamped, bring the nozzle forward slowly at low force against a piece of thin paper held on the sprue bushing seat.",[283,384,385],{},"Look at the print the nozzle leaves. It should be a full, even ring around the center of the seat.",[283,387,388,389,393],{},"If the print is off center and the locating ring and bore are correct, check the alignment of the injection unit and its carriage on the ",[269,390,392],{"href":391},"\u002Finjection-molding-machine-parts\u002Finjection-unit\u002Flinear-guide\u002F","linear guide",", as the manual describes.",[275,395,397],{"id":396},"replacing-a-locating-ring","Replacing a locating ring",[375,399,400,403,406,409],{},[283,401,402],{},"Take the mold out of the machine, or reach the ring with the mold safely supported.",[283,404,405],{},"Remove the ring screws and take off the ring. Check whether it also retains the sprue bushing, and keep the bushing in place.",[283,407,408],{},"Clean the seat and inspect the sprue bushing.",[283,410,411],{},"Check the new ring's outside diameter against the platen bore, fit it, and tighten the screws evenly.",[275,413,415],{"id":414},"what-to-send-for-a-replacement-quote","What to send for a replacement quote",[265,417,418,419,423,424,428],{},"Send the ring's outside diameter, thickness and inside diameter; the screw size and bolt circle; the diameter of the platen's center bore from the machine data; and the machine brand and model. A photo of the old ring helps. ",[269,420,422],{"href":421},"\u002Frequest-quote\u002F","Request a quote",", and see the ",[269,425,427],{"href":426},"\u002Finjection-molding-machine-parts\u002Fplatens\u002F","platens guide"," for the other platen features.",{"title":430,"searchDepth":21,"depth":21,"links":431},"",[432,433,434,435,436,437,438],{"id":277,"depth":21,"text":278},{"id":308,"depth":21,"text":309},{"id":337,"depth":21,"text":338},{"id":351,"depth":21,"text":352},{"id":372,"depth":21,"text":373},{"id":396,"depth":21,"text":397},{"id":414,"depth":21,"text":415},"What the locating ring does in injection molding, how it centers the mold on the stationary platen and nozzle, how to match its size, and the signs of a poor fit.",null,"md",[443,446,449,452],{"question":444,"answer":445},"What is a locating ring in injection molding?","A locating ring is a round steel ring on the fixed half of the mold that fits into the center bore of the stationary platen. It centers the mold so that the sprue bushing lines up with the machine nozzle.",{"question":447,"answer":448},"Is the locating ring part of the mold or the machine?","The locating ring is normally part of the mold, fitted to its fixed clamping plate. The machine provides the center bore it fits into, and some machines have a replaceable centering insert in that bore.",{"question":450,"answer":451},"How do I know what size locating ring a machine needs?","The machine's data sheet gives the diameter of the stationary platen's center bore. The mold's locating ring must match it with a small sliding clearance.",{"question":453,"answer":454},"Does the locating ring hold the mold in place?","No. The locating ring only centers the mold; the mold clamps or bolts hold it against the platen.","center-bore","2026-10-31",{},true,[460],"MC-JM-04","\u002Finjection-molding-machine-parts\u002Fplatens\u002Flocating-ring",{"title":260,"description":439},"Injection Molding Locating Ring: Function and Fit","Locating ring","injection-molding-machine-parts\u002Fplatens\u002Flocating-ring","0oXpEWPn3oeQJ7locDZQxHT7EbciHjGfCzgxIMgmPs8",[468,472,476],{"path":469,"title":470,"short":471},"\u002Finjection-molding-machine-parts\u002Fplatens\u002Fmoving-platen","Moving platen and stationary platen of an injection molding machine","Moving platen",{"path":473,"title":474,"short":475},"\u002Finjection-molding-machine-parts\u002Fplatens\u002Fplaten-parallelism","Platen parallelism of an injection molding machine","Platen parallelism",{"path":477,"title":478,"short":479},"\u002Finjection-molding-machine-parts\u002Fplatens\u002Fmold-clamps","Mold clamps and T-slots for injection molding","Mold clamps and T-slots",{"diagram":481},"platen",{"diagram":483},{"title":484,"description":485,"items":486},"Parts of a platen","Line drawing of an injection molding machine platen in front view and side view, showing the tie bar bores, T-slots, tapped holes, center bore with locating ring, ejector holes and toggle lugs, numbered.",[487,500,525,538,557,577,592],{"id":481,"name":488,"role":489,"parts":490,"marker":492,"shapes":496},"Platen","Cast iron plate the mold half is bolted to. A toggle machine has three: the stationary platen at the injection side, the moving platen and the rear platen behind the toggle.",[491],"MC-PP-01",[493,494,493,495],464,24,50,{"solid":497},[498,499],"M104 50h252a4 4 0 0 1 4 4v252a4 4 0 0 1 -4 4h-252a4 4 0 0 1 -4 -4v-252a4 4 0 0 1 4 -4z","M442 50h44a2 2 0 0 1 2 2v256a2 2 0 0 1 -2 2h-44a2 2 0 0 1 -2 -2v-256a2 2 0 0 1 2 -2z",{"id":501,"name":502,"role":503,"parts":504,"marker":506,"shapes":509},"tie-bar-bores","Tie bar bores and bushings","The four tie bars pass through the corner bores. In the moving platen each bore has a bushing, so the platen slides along the bars without wear.",[505],"MC-TC-07",[507,494,507,508],140,66,{"solid":510,"line":515,"hidden":520},[511,512,513,514],"M116 90a24 24 0 1 0 48 0a24 24 0 1 0 -48 0z","M116 270a24 24 0 1 0 48 0a24 24 0 1 0 -48 0z","M296 90a24 24 0 1 0 48 0a24 24 0 1 0 -48 0z","M296 270a24 24 0 1 0 48 0a24 24 0 1 0 -48 0z",[516,517,518,519],"M123 90a17 17 0 1 0 34 0a17 17 0 1 0 -34 0z","M123 270a17 17 0 1 0 34 0a17 17 0 1 0 -34 0z","M303 90a17 17 0 1 0 34 0a17 17 0 1 0 -34 0z","M303 270a17 17 0 1 0 34 0a17 17 0 1 0 -34 0z",[521,522,523,524],"M440 66L488 66","M440 114L488 114","M440 246L488 246","M440 294L488 294",{"id":526,"name":527,"role":528,"parts":529,"marker":530,"shapes":534},"t-slots","T-slots","Slots across the platen face for the bolts of the mold clamps that hold the mold half in place.",[460],[531,494,532,533],190,176,120,{"solid":535},[536,537],"M109 120h242a1 1 0 0 1 1 1v6a1 1 0 0 1 -1 1h-242a1 1 0 0 1 -1 -1v-6a1 1 0 0 1 1 -1z","M109 232h242a1 1 0 0 1 1 1v6a1 1 0 0 1 -1 1h-242a1 1 0 0 1 -1 -1v-6a1 1 0 0 1 1 -1z",{"id":539,"name":540,"role":541,"marker":542,"shapes":545},"tapped-holes","Tapped holes","Threaded holes in a set pattern, for bolting the mold or its clamps straight to the platen.",[531,543,531,544],336,255.5,{"solid":546},[547,548,549,550,551,552,553,554,555,556],"M186.5 108a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M186.5 252a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M226.5 108a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M226.5 252a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M266.5 108a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M266.5 252a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M120.5 160a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M120.5 200a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M332.5 160a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z","M332.5 200a3.5 3.5 0 1 0 7 0a3.5 3.5 0 1 0 -7 0z",{"id":455,"name":558,"role":559,"parts":560,"marker":561,"shapes":565},"Center bore and locating ring","On the stationary platen the locating ring in this bore centers the mold on the nozzle. On the moving platen the bore lets the ejector rod through.",[460],[562,543,563,564],236,245,206,{"solid":566,"line":569,"hidden":574},[567,568],"M200 180a30 30 0 1 0 60 0a30 30 0 1 0 -60 0z","M435 150h4a1 1 0 0 1 1 1v58a1 1 0 0 1 -1 1h-4a1 1 0 0 1 -1 -1v-58a1 1 0 0 1 1 -1z",[570,571,572,573],"M212 180a18 18 0 1 0 36 0a18 18 0 1 0 -36 0z","M227.5 204a2.5 2.5 0 1 0 5 0a2.5 2.5 0 1 0 -5 0z","M206.71539030917347 168a2.5 2.5 0 1 0 5 0a2.5 2.5 0 1 0 -5 0z","M248.28460969082653 168a2.5 2.5 0 1 0 5 0a2.5 2.5 0 1 0 -5 0z",[575,576],"M440 162L488 162","M440 198L488 198",{"id":578,"name":579,"role":580,"parts":581,"marker":583,"shapes":586},"ejector-holes","Ejector holes","On the moving platen, extra holes for ejector rods that push the mold’s ejector plate at several points.",[582],"MC-ES-08",[584,543,585,564],282,280,{"solid":587},[588,589,590,591],"M174 160a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z","M174 200a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z","M274 160a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z","M274 200a6 6 0 1 0 12 0a6 6 0 1 0 -12 0z",{"id":593,"name":594,"role":595,"subcategory":90,"marker":596,"shapes":599},"toggle-lugs","Toggle lugs","Lugs on the back of the moving and rear platens where the toggle links are pinned.",[597,543,597,598],504,294,{"solid":600,"line":603},[601,602],"M491 66h26a3 3 0 0 1 3 3v42a3 3 0 0 1 -3 3h-26a3 3 0 0 1 -3 -3v-42a3 3 0 0 1 3 -3z","M491 246h26a3 3 0 0 1 3 3v42a3 3 0 0 1 -3 3h-26a3 3 0 0 1 -3 -3v-42a3 3 0 0 1 3 -3z",[604,605],"M496 90a8 8 0 1 0 16 0a8 8 0 1 0 -16 0z","M496 270a8 8 0 1 0 16 0a8 8 0 1 0 -16 0z",[607],{"partNumber":460,"name":608,"subcategory":110,"subcategoryName":609,"shortDescription":610,"image":611,"inStock":458,"zone":88,"compatibleMachines":612},"Mold Clamping Plate \u002F Locating Ring","Mold Interface","Mold clamping plate and locating ring for injection molding machine platens.","\u002Fpart-images\u002FMC\u002FMC-JM-04\u002F1c14909c-5314-4154-98bb-30936336a906.png",[613,614],"Haitian MA Series","Haitian MA II Series",1793548980462]