[{"data":1,"prerenderedAt":450},["ShallowReactive",2],{"catalog:meta":3,"catalog:part:mc-sr-05":258,"diagram:part:mc-sr-05":332,"guides:links:parts:MC-SR-05":445,"blog:related:3:ejector spring,return spring,return spring \u002F ejector spring,springs & supports":449},{"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,{"part":259,"category":287,"zone":302,"related":303},{"partNumber":260,"name":261,"slug":262,"category":60,"subcategory":106,"categoryName":61,"subcategoryName":263,"shortDescription":264,"description":265,"specifications":266,"variants":273,"compatibleMachines":274,"images":278,"tags":279,"relatedParts":282,"inStock":285,"featured":286},"MC-SR-05","Return Spring \u002F Ejector Spring","return-ejector-spring","Springs & Supports","Return spring and ejector spring for injection molding machine ejector and toggle systems.","Heavy-duty tempered steel return springs for injection molding machine ejector systems and toggle mechanism returns. Available in various sizes and spring rates to match different machine models.",[267,270],{"name":268,"value":269},"Material","65Mn Spring Steel",{"name":271,"value":272},"Surface","Shot-peened \u002F zinc plated",[],[275,276,277],"Haitian MA Series","Haitian MA II Series","Yizumi A5 Series",[],[280,281],"return spring","ejector spring",[283,284],"MC-ES-08","MC-ES-09",true,false,{"id":60,"name":61,"slug":62,"description":63,"partCount":64,"subcategories":288},[289,290,291,292,293,294,295,296,297,298,299,300,301],{"id":67,"name":68,"slug":69,"partCount":70},{"id":72,"name":73,"slug":74,"partCount":16},{"id":76,"name":77,"slug":78,"partCount":79},{"id":81,"name":82,"slug":83,"partCount":84},{"id":86,"name":87,"slug":88,"partCount":26},{"id":90,"name":91,"slug":92,"partCount":70},{"id":94,"name":95,"slug":96,"partCount":21},{"id":98,"name":99,"slug":100,"partCount":21},{"id":102,"name":103,"slug":104,"partCount":21},{"id":106,"name":107,"slug":108,"partCount":26},{"id":110,"name":111,"slug":112,"partCount":113},{"id":115,"name":116,"slug":117,"partCount":26},{"id":119,"name":120,"slug":121,"partCount":26},{"id":222,"number":113,"name":223,"role":224},[304,309,320,327],{"partNumber":283,"name":305,"subcategory":102,"subcategoryName":306,"shortDescription":307,"inStock":285,"zone":222,"compatibleMachines":308},"Ejector Rod","Ejector System","Machine ejector rod for injection molding machine ejector system.",[275,276],{"partNumber":284,"name":310,"subcategory":102,"subcategoryName":306,"shortDescription":311,"image":312,"inStock":285,"zone":222,"compatibleMachines":313},"Ejector Connecting Plate & Pin Kit","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",[314,315,316,317,318,319],"Haitian MA60T","Haitian MA80T","Haitian MA90T","Haitian MA120T","Haitian MA160T","Haitian MA200T",{"partNumber":321,"name":322,"subcategory":67,"subcategoryName":68,"shortDescription":323,"image":324,"inStock":285,"zone":232,"compatibleMachines":325},"MC-BC-01","Bimetallic Barrel & Screw Assembly","High-quality bimetallic barrel and screw assembly for plastic injection molding machines.","\u002Fpart-images\u002FMC\u002FMC-BC-01\u002FMC-BC-02\u002Ffront.jpg",[275,276,326,277],"Haitian Jupiter Series",{"partNumber":328,"name":329,"subcategory":67,"subcategoryName":68,"shortDescription":330,"image":324,"inStock":285,"zone":232,"compatibleMachines":331},"MC-BC-02","Injection Screw","Replacement injection screw for injection molding machine plasticizing unit.",[275,276],{"diagram":333,"items":444},{"title":334,"description":335,"base":336,"labels":346,"items":351},"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":337,"line":341,"hidden":344},[338,339,340],"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",[342,343],"M140 138L140 84L270 84","M140 202L140 256L270 256",[345],"M414 146h12v48h-12z",[347],{"x":348,"y":349,"text":350},460,90,"MOLD",[352,371,386,398,410,431],{"id":353,"name":354,"role":355,"parts":356,"marker":358,"shapes":362},"ejector-cylinder","Ejector cylinder","Small hydraulic cylinder mounted behind the moving platen. It pushes the ejector plate forward to free the part, then pulls it back.",[357],"MC-CC-02",[359,360,359,361],128,24,138,{"solid":363,"hidden":368},[364,365,366,367],"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",[369,370],"M132 142h10v56h-10z","M142 170L180 170",{"id":372,"name":373,"role":374,"parts":375,"marker":376,"shapes":380},"connecting-plate","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.",[284],[377,360,378,379],190,223,96,{"solid":381,"line":383},[382],"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",[384,385],"M200 104L270 104","M200 236L270 236",{"id":387,"name":388,"role":389,"parts":390,"marker":391,"shapes":394},"return-springs","Return springs","Springs on the guide pins that push the plate back after ejection, so the ejector rods are clear before the mold closes.",[260],[392,360,392,393],244,98,{"line":395},[396,397],"M230 104L234 98L239 110L244 98L249 110L254 98L259 110L264 98L268 104L270 104","M230 236L234 230L239 242L244 230L249 242L254 230L259 242L264 230L268 236L270 236",{"id":399,"name":400,"role":401,"parts":402,"marker":404,"shapes":407},"moving-platen","Moving platen","The ejector rods pass through holes in the moving platen to reach the mold.",[403],"MC-PP-01",[405,360,406,256],296,290,{"solid":408},[409],"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":411,"name":412,"role":413,"parts":414,"marker":415,"shapes":419},"ejector-rods","Ejector rods","Hardened rods that carry the ejector force through the platen to the mold’s ejector plate.",[283],[416,360,417,418],340,324,125,{"solid":420,"hidden":424},[421,422,423],"M230 125h40v10h-40z","M230 165h40v10h-40z","M230 205h40v10h-40z",[425,426,427,428,429,430],"M270 125L340 125","M270 135L340 135","M270 165L340 165","M270 175L340 175","M270 205L340 205","M270 215L340 215",{"id":432,"name":433,"role":434,"marker":435,"shapes":439},"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.",[436,360,437,438],384,350,108,{"hidden":440},[441,442,443],"M340 108h14v124h-14z","M354 134L420 134","M354 206L420 206",[387],[446],{"to":447,"label":388,"description":448},"\u002Finjection-molding-machine-parts\u002Fejector\u002Freturn-springs\u002F","What ejector return springs do on an injection molding machine and in the mold, spring types, signs of a broken or tired spring, and how to check and replace them.",[],1793548979057]