[{"data":1,"prerenderedAt":621},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-plate:*":258,"guides:topics:ejector:\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-plate:path,title,short":480,"guides:page:\u002Finjection-molding-machine-parts\u002Fejector:diagram":497,"diagram:id:ejector":498,"catalog:parts::MC-ES-09":608},{"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":452,"diagram":453,"extension":454,"faq":455,"item":468,"lastModified":469,"meta":470,"navigation":471,"order":21,"parts":472,"path":474,"seo":475,"seoTitle":476,"short":477,"stem":478,"__hash__":479},"guides\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-plate.md","Ejector plate in injection molding",{"type":262,"value":263,"toc":443},"minimark",[264,268,273,276,279,292,301,305,308,324,332,336,361,364,368,371,385,388,402,406,426,430],[265,266,267],"p",{},"In injection molding, \"ejector plate\" can mean two different plates. On the machine, the ejector connecting plate sits behind the moving platen and joins the ejector cylinder's rod to the ejector rods. In the mold, the ejector plate and its retainer plate carry the ejector pins. The machine's plate drives the mold's plate through the ejector rods: when the connecting plate moves forward, the rods push the mold's ejector plate, and its pins push the part off the core. This page covers both, starting with the machine's connecting plate, the item highlighted in the drawing.",[269,270,272],"h2",{"id":271},"the-machines-connecting-plate","The machine's connecting plate",[265,274,275],{},"The connecting plate is a steel plate fixed to the end of the ejector cylinder's rod. The ejector rods screw into it, so the cylinder moves all the rods together. Guide pins pass through it, and in the drawing the return springs sit on these pins between the plate and the moving platen.",[265,277,278],{},"The connecting plate has three jobs:",[280,281,282,286,289],"ul",{},[283,284,285],"li",{},"to share the cylinder's force between the rods in use;",[283,287,288],{},"to keep the rods parallel to each other and square to the platen, guided by its pins;",[283,290,291],{},"to stop all the rods at the same position at both ends of the stroke.",[265,293,294,295,300],{},"The ",[296,297,299],"a",{"href":298},"\u002Fparts\u002Fmc-es-09\u002F","connecting plate and pin kit"," we supply for Haitian MA60–160T and MA200T machines includes a recessed connecting plate with holes, a connecting plate with holes, a solid connecting plate and a pin, sold individually or as a 4-piece set, in alloy steel with a black oxide or nickel finish.",[269,302,304],{"id":303},"the-molds-ejector-plate","The mold's ejector plate",[265,306,307],{},"Inside the mold, behind the core, two plates are bolted together:",[280,309,310,318],{},[283,311,312,313,317],{},"the ",[314,315,316],"strong",{},"ejector retainer plate",", which holds the heads of the ejector pins, sleeves and blades in counterbored holes;",[283,319,312,320,323],{},[314,321,322],{},"ejector plate"," behind it, which closes the counterbores and takes the push of the machine's ejector rods.",[265,325,326,327,331],{},"The two plates move in the space between the support plate and the mold's ejector-side clamping plate, between the spacer blocks. Many molds guide them with their own ejector guide pins and bushings, and rest them on stop buttons, small pads that give a clean, defined back position. Return pins fixed in the plates reach the parting line, so the fixed half pushes the plates back when the mold closes, and springs often return them earlier. The pins themselves are covered on the ",[296,328,330],{"href":329},"\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-pins\u002F","ejector pins"," page.",[269,333,335],{"id":334},"how-the-two-plates-work-together","How the two plates work together",[337,338,339,342,345,348],"ol",{},[283,340,341],{},"The ejector cylinder pushes the machine's connecting plate forward.",[283,343,344],{},"The ejector rods carry the push through the moving platen and the mold's clamping plate to the mold's ejector plate.",[283,346,347],{},"The mold's plate moves forward and the pins push the part.",[283,349,350,351,355,356,360],{},"On the way back, the connecting plate retracts, helped by the ",[296,352,354],{"href":353},"\u002Finjection-molding-machine-parts\u002Fejector\u002Freturn-springs\u002F","return springs",". The mold's plate follows if the rods are coupled to it, or is returned by its own springs and return pins if they are not: see ",[296,357,359],{"href":358},"\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-rod\u002F","ejector rods",".",[265,362,363],{},"If either plate tilts, the pins are pushed sideways in their holes, which leads to galling, binding and broken pins.",[269,365,367],{"id":366},"signs-of-wear-or-damage","Signs of wear or damage",[265,369,370],{},"On the machine's connecting plate:",[280,372,373,376,379,382],{},[283,374,375],{},"worn or scored guide pins and guide holes, which let the plate tilt;",[283,377,378],{},"damaged threads where the ejector rods and the cylinder rod screw in, or rods that keep coming loose;",[283,380,381],{},"a bent or cracked plate after ejecting against a blocked mold;",[283,383,384],{},"broken or tired return springs, so the plate returns slowly or not fully.",[265,386,387],{},"In the mold:",[280,389,390,393,396,399],{},[283,391,392],{},"pins binding or breaking, often on one side of the plate;",[283,394,395],{},"a plate that does not return fully, so the pins stand proud and leave marks, or are crushed when the mold closes;",[283,397,398],{},"dirt, plastic or water under the plate or on the stop buttons;",[283,400,401],{},"worn ejector guide bushings.",[269,403,405],{"id":404},"inspecting-and-replacing-the-connecting-plate","Inspecting and replacing the connecting plate",[337,407,408,411,414,417,420,423],{},[283,409,410],{},"Retract the ejector, switch off and lock out the machine, and release the hydraulic pressure.",[283,412,413],{},"Remove the ejector rods, then unscrew or unbolt the plate from the cylinder rod.",[283,415,416],{},"Take the plate off with its guide pins and springs, noting how the springs and any spacers sit.",[283,418,419],{},"Check the plate for flatness and cracks, the guide holes and pins for wear, and all the threads.",[283,421,422],{},"Fit the new plate and pins, refit the springs, tighten the cylinder rod connection and refit the rods.",[283,424,425],{},"Run the ejector slowly without a mold, then with the mold, and check that the plate moves smoothly and stops square.",[269,427,429],{"id":428},"what-to-send-for-a-replacement-quote","What to send for a replacement quote",[265,431,432,433,437,438,442],{},"Send the machine brand, model and clamping force; which plate you need (recessed with holes, with holes, or solid), or a photo of the old one; the plate's outside dimensions and thickness; the positions and thread sizes of the holes for the ejector rods and the cylinder rod; and the diameter and length of the guide pins. ",[296,434,436],{"href":435},"\u002Frequest-quote\u002F","Request a quote",", and see the ",[296,439,441],{"href":440},"\u002Finjection-molding-machine-parts\u002Fejector\u002F","ejector guide"," for the whole system.",{"title":444,"searchDepth":21,"depth":21,"links":445},"",[446,447,448,449,450,451],{"id":271,"depth":21,"text":272},{"id":303,"depth":21,"text":304},{"id":334,"depth":21,"text":335},{"id":366,"depth":21,"text":367},{"id":404,"depth":21,"text":405},{"id":428,"depth":21,"text":429},"The two ejector plates in injection molding: the machine's connecting plate behind the moving platen and the mold's ejector plate, how they work together and wear.",null,"md",[456,459,462,465],{"question":457,"answer":458},"What is an ejector plate in injection molding?","In the mold, the ejector plate is the plate, bolted to a retainer plate, that carries the ejector pins and pushes them forward to eject the part. On the machine, the connecting plate behind the moving platen, which drives the ejector rods, is also often called the ejector plate.",{"question":460,"answer":461},"How does the machine move the mold's ejector plate?","The machine's ejector cylinder pushes its connecting plate, which drives the ejector rods through the moving platen. The rods push the mold's ejector plate, and its pins push the part off the core.",{"question":463,"answer":464},"What brings the ejector plate back?","On the machine, the ejector cylinder and, on many machines, return springs on the guide pins. In the mold, coupled ejector rods pull the plate back; otherwise the mold's springs and return pins push it back as the mold closes.",{"question":466,"answer":467},"Why do ejector pins break on one side of the plate?","Usually because the plate tilts as it moves. Common causes are ejector rods of different lengths, worn guide pins or bushings, and dirt under the plate.","connecting-plate","2026-10-31",{},true,[473],"MC-ES-09","\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-plate",{"title":260,"description":452},"Ejector Plate in Injection Molding: Machine and Mold","Ejector plate","injection-molding-machine-parts\u002Fejector\u002Fejector-plate","3DkPdV6e858TXAUX2gdSlkpu7D3XxZA48U-Z41siMO8",[481,485,489,493],{"path":482,"title":483,"short":484},"\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-rod","Ejector rods of an injection molding machine","Ejector rods",{"path":486,"title":487,"short":488},"\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-pins","Ejector pins in injection molding","Ejector pins",{"path":490,"title":491,"short":492},"\u002Finjection-molding-machine-parts\u002Fejector\u002Freturn-springs","Ejector return springs","Return springs",{"path":494,"title":495,"short":496},"\u002Finjection-molding-machine-parts\u002Fejector\u002Fejector-cylinder","Ejector cylinder of an injection molding machine","Ejector cylinder",{"diagram":222},{"diagram":499},{"title":500,"description":501,"base":502,"labels":512,"items":517},"Parts of the ejector","Side view of the ejector system: ejector cylinder, connecting plate and pins, return springs, moving platen, ejector rods and the mold ejector plate, numbered.",{"solid":503,"line":507,"hidden":510},[504,505,506],"M310 96h110v148h-110z","M420 96h80v148h-80z","M502 70h26a2 2 0 0 1 2 2v216a2 2 0 0 1 -2 2h-26a2 2 0 0 1 -2 -2v-216a2 2 0 0 1 2 -2z",[508,509],"M140 138L140 84L270 84","M140 202L140 256L270 256",[511],"M414 146h12v48h-12z",[513],{"x":514,"y":515,"text":516},460,90,"MOLD",[518,536,550,562,574,595],{"id":519,"name":496,"role":520,"parts":521,"marker":523,"shapes":527},"ejector-cylinder","Small hydraulic cylinder mounted behind the moving platen. It pushes the ejector plate forward to free the part, then pulls it back.",[522],"MC-CC-02",[524,525,524,526],128,24,138,{"solid":528,"hidden":533},[529,530,531,532],"M93 138h84a3 3 0 0 1 3 3v58a3 3 0 0 1 -3 3h-84a3 3 0 0 1 -3 -3v-58a3 3 0 0 1 3 -3z","M104 128h10v10h-10z","M152 128h10v10h-10z","M180 163h36v14h-36z",[534,535],"M132 142h10v56h-10z","M142 170L180 170",{"id":468,"name":537,"role":538,"parts":539,"marker":540,"shapes":544},"Connecting plate and pins","Plate that joins the cylinder rod to the ejector rods so they all move together. Guide pins through it keep it square.",[473],[541,525,542,543],190,223,96,{"solid":545,"line":547},[546],"M218 96h10a2 2 0 0 1 2 2v144a2 2 0 0 1 -2 2h-10a2 2 0 0 1 -2 -2v-144a2 2 0 0 1 2 -2z",[548,549],"M200 104L270 104","M200 236L270 236",{"id":551,"name":492,"role":552,"parts":553,"marker":555,"shapes":558},"return-springs","Springs on the guide pins that push the plate back after ejection, so the ejector rods are clear before the mold closes.",[554],"MC-SR-05",[556,525,556,557],244,98,{"line":559},[560,561],"M230 104L234 98L239 110L244 98L249 110L254 98L259 110L264 98L268 104L270 104","M230 236L234 230L239 242L244 230L249 242L254 230L259 242L264 230L268 236L270 236",{"id":563,"name":564,"role":565,"parts":566,"marker":568,"shapes":571},"moving-platen","Moving platen","The ejector rods pass through holes in the moving platen to reach the mold.",[567],"MC-PP-01",[569,525,570,256],296,290,{"solid":572},[573],"M272 70h36a2 2 0 0 1 2 2v216a2 2 0 0 1 -2 2h-36a2 2 0 0 1 -2 -2v-216a2 2 0 0 1 2 -2z",{"id":575,"name":484,"role":576,"parts":577,"marker":579,"shapes":583},"ejector-rods","Hardened rods that carry the ejector force through the platen to the mold’s ejector plate.",[578],"MC-ES-08",[580,525,581,582],340,324,125,{"solid":584,"hidden":588},[585,586,587],"M230 125h40v10h-40z","M230 165h40v10h-40z","M230 205h40v10h-40z",[589,590,591,592,593,594],"M270 125L340 125","M270 135L340 135","M270 165L340 165","M270 175L340 175","M270 205L340 205","M270 215L340 215",{"id":596,"name":597,"role":598,"marker":599,"shapes":603},"mold-ejector","Mold ejector plate and pins","Part of the mold, not the machine: the plate carries the pins that push the molded part off the core.",[600,525,601,602],384,350,108,{"hidden":604},[605,606,607],"M340 108h14v124h-14z","M354 134L420 134","M354 206L420 206",[609],{"partNumber":473,"name":610,"subcategory":102,"subcategoryName":611,"shortDescription":612,"image":613,"inStock":471,"zone":222,"compatibleMachines":614},"Ejector Connecting Plate & Pin Kit","Ejector System","Ejector assembly connecting plate and pin kit for Haitian injection molding machines.","\u002Fpart-images\u002FMC\u002FMC-ES-09\u002FRecessed Connecting Plate with Holes\u002FRecessed Connecting Plate with Holes.jpg",[615,616,617,618,619,620],"Haitian MA60T","Haitian MA80T","Haitian MA90T","Haitian MA120T","Haitian MA160T","Haitian MA200T",1793548979148]