[{"data":1,"prerenderedAt":764},["ShallowReactive",2],{"catalog:meta":3,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size:*":258,"guides:topics:barrel-screw:\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size:path,title,short":522,"guides:page:\u002Finjection-molding-machine-parts\u002Fbarrel-screw:diagram":574,"diagram:id:injection-unit":575,"catalog:parts::MC-BC-01,MC-SB-01":747},{"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":492,"diagram":493,"extension":494,"faq":495,"item":508,"lastModified":509,"meta":510,"navigation":511,"order":512,"parts":513,"path":516,"seo":517,"seoTitle":518,"short":519,"stem":520,"__hash__":521},"guides\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size.md","Shot size calculation for injection molding machines",{"type":262,"value":263,"toc":483},"minimark",[264,273,282,287,294,300,303,313,316,320,325,332,339,344,347,355,359,373,376,379,383,389,409,412,416,419,434,437,445,449,452,470],[265,266,267,268,272],"p",{},"The shot size of an injection molding machine is the volume, or weight, of melt that the screw can push into the mold in one stroke. Shot size calculation starts from the screw diameter and the injection stroke: ",[269,270,271],"strong",{},"shot volume = π × D² ÷ 4 × stroke",". To get the shot weight for your material, multiply that volume by the material's melt density. Machine catalogs usually state shot weight for polystyrene, so convert it before comparing it with your part.",[265,274,275,276,281],{},"Shot size is a property of the barrel and screw, items 3 and 4 in the drawing. For how the screw builds the shot during recovery, see the ",[277,278,280],"a",{"href":279},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002F","barrel and screw guide",".",[283,284,286],"h2",{"id":285},"barrel-capacity-calculation","Barrel capacity calculation",[265,288,289,290,293],{},"The ",[269,291,292],{},"barrel capacity",", or theoretical shot volume, is the volume the screw sweeps over its full injection stroke:",[265,295,296,299],{},[269,297,298],{},"Shot volume (cm³) = π × D² ÷ 4 × stroke",", with the screw diameter D and the stroke in centimeters.",[265,301,302],{},"For example, a screw of 40 mm (4.0 cm) diameter with a maximum stroke of 150 mm (15 cm):",[304,305,306,310],"ol",{},[307,308,309],"li",{},"Screw cross-section area: π × 4.0² ÷ 4 = 12.57 cm²",[307,311,312],{},"Theoretical shot volume: 12.57 × 15 = 188.5 cm³",[265,314,315],{},"The screw diameter and the maximum stroke are in the machine's specification sheet, usually together with the theoretical shot volume.",[283,317,319],{"id":318},"from-shot-volume-to-shot-weight","From shot volume to shot weight",[265,321,322],{},[269,323,324],{},"Shot weight (g) = shot volume (cm³) × melt density (g\u002Fcm³)",[265,326,327,328,331],{},"Use the ",[269,329,330],{},"melt density",", not the density of the solid plastic: the melt is less dense than the molded part, which shrinks as it cools. Material data sheets often list it. In the example, a material with a melt density of 0.9 g\u002Fcm³ gives 188.5 × 0.9 ≈ 170 g.",[265,333,334,335,338],{},"Machine catalogs usually give shot weight for ",[269,336,337],{},"polystyrene (PS)",". To convert:",[265,340,341],{},[269,342,343],{},"Shot weight for your material ≈ PS shot weight × (density of your material ÷ density of PS)",[265,345,346],{},"using the same kind of density, melt or solid, for both.",[265,348,349,350,354],{},"In practice the screw delivers a little less than the theoretical volume, because the melt compresses under pressure and a little flows back past the ",[277,351,353],{"href":352},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring\u002F","check ring"," before it closes. A worn check ring or a worn screw and barrel make the difference larger.",[283,356,358],{"id":357},"how-much-shot-a-mold-needs","How much shot a mold needs",[304,360,361,364,367,370],{},[307,362,363],{},"Weigh the parts from all cavities together with the runner and sprue (for a cold runner mold), or calculate it from the part volumes.",[307,365,366],{},"Convert the weight to melt volume: weight ÷ melt density.",[307,368,369],{},"Divide by the screw cross-section area to get the stroke the shot needs.",[307,371,372],{},"Add the cushion: the melt left in front of the screw at the end of hold, so the screw does not bottom out.",[265,374,375],{},"For example, 120 g of parts and runner in a material with a melt density of 0.9 g\u002Fcm³ needs 120 ÷ 0.9 = 133 cm³ of melt. On the 40 mm screw above, that is 133 ÷ 12.57 = 10.6 cm, or about 106 mm of stroke, plus the cushion.",[265,377,378],{},"Decompression (suck-back) after recovery moves the screw further back without adding melt, so it does not count toward the shot.",[283,380,382],{"id":381},"shot-size-as-a-share-of-barrel-capacity","Shot size as a share of barrel capacity",[265,384,385,388],{},[269,386,387],{},"Capacity used = shot volume needed ÷ theoretical shot volume."," In the example, 133 ÷ 188.5 ≈ 71%.",[390,391,392,398],"ul",{},[307,393,394,397],{},[269,395,396],{},"Too small a share."," The plastic stays in the barrel for many cycles before it is injected. The residence time grows, and heat-sensitive materials degrade, giving black specks and discoloration. Very short strokes are also harder to control precisely.",[307,399,400,403,404,408],{},[269,401,402],{},"Too large a share."," There is little stroke left for the cushion and for process changes. The screw also recovers over a long stroke, which shortens the length of flights doing the melting; see ",[277,405,407],{"href":406},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio\u002F","L\u002FD ratio"," for why that affects melt quality.",[265,410,411],{},"A common rule of thumb is to use roughly 20% to 80% of the barrel's shot capacity. Material suppliers give a maximum residence time for heat-sensitive grades, which can narrow that range.",[283,413,415],{"id":414},"choosing-a-screw-diameter-for-the-shot","Choosing a screw diameter for the shot",[265,417,418],{},"Many injection units can be fitted with more than one screw diameter. The force of the injection cylinder stays the same, so:",[390,420,421,428],{},[307,422,423,424,427],{},"A ",[269,425,426],{},"larger screw"," gives more shot volume but a lower maximum injection pressure.",[307,429,423,430,433],{},[269,431,432],{},"smaller screw"," gives less shot volume but a higher maximum injection pressure.",[265,435,436],{},"Shot volume grows with the square of the diameter, and the maximum injection pressure falls by the same factor. For example, going from a 40 mm to a 45 mm screw gives (45 ÷ 40)² ≈ 1.27 times the shot volume and about 0.79 times the maximum injection pressure. Choose the screw that covers the shot with the pressure the part needs.",[265,438,439,440,444],{},"A change of screw diameter means a new screw, barrel and tip set, and the machine maker should confirm that the injection unit accepts it. Our article on ",[277,441,443],{"href":442},"\u002Fblog\u002Fshort-shots-injection-molding-causes-fixes\u002F","short shots"," covers what to check when the machine does not fill the part.",[283,446,448],{"id":447},"what-to-send-for-a-quote","What to send for a quote",[265,450,451],{},"If your shots do not fit the barrel you have, send:",[304,453,454,457,460,463],{},[307,455,456],{},"The machine brand and model, and the current screw diameter.",[307,458,459],{},"The shot weight you need, including the runner, and the material.",[307,461,462],{},"The injection pressure the part needs, if you know it.",[307,464,465,466,281],{},"The screw and barrel details listed in the ",[277,467,469],{"href":468},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew\u002F","screw guide",[265,471,472,473,477,478,482],{},"We supply ",[277,474,476],{"href":475},"\u002Fparts\u002Fmc-bc-01\u002F","bimetallic barrel and screw assemblies",". ",[277,479,481],{"href":480},"\u002Frequest-quote\u002F","Request a quote"," with the details above.",{"title":484,"searchDepth":21,"depth":21,"links":485},"",[486,487,488,489,490,491],{"id":285,"depth":21,"text":286},{"id":318,"depth":21,"text":319},{"id":357,"depth":21,"text":358},{"id":381,"depth":21,"text":382},{"id":414,"depth":21,"text":415},{"id":447,"depth":21,"text":448},"How to calculate shot size and barrel capacity on an injection molding machine: swept volume, shot weight for your material, stroke, cushion and capacity use.",null,"md",[496,499,502,505],{"question":497,"answer":498},"How do you calculate shot size in injection molding?","Multiply the screw's cross-section area by the injection stroke: shot volume = π × D² ÷ 4 × stroke. Multiply the volume by the material's melt density to get the shot weight.",{"question":500,"answer":501},"What is the difference between shot volume and shot weight?","Shot volume is the volume of melt the screw sweeps in one stroke, set by the screw diameter and stroke. Shot weight is that volume multiplied by the density of the material, so the same machine has a different shot weight for each material.",{"question":503,"answer":504},"Why is the shot weight of a machine given for polystyrene?","Polystyrene (PS) is used as a common reference material, so that machines can be compared. To find the shot weight for another material, scale the PS figure by the ratio of the two materials' densities.",{"question":506,"answer":507},"What percentage of the barrel capacity should a shot use?","A common rule of thumb is to use roughly 20% to 80% of the barrel's shot capacity. Smaller shots leave the plastic in the barrel too long, larger ones leave little reserve; heat-sensitive materials need a narrower range, so check the material supplier's guidance.","barrel","2026-10-31",{},true,13,[514,515],"MC-BC-01","MC-SB-01","\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size",{"title":260,"description":492},"Shot Size Calculation: Barrel Capacity and Shot Weight","Shot size calculation","injection-molding-machine-parts\u002Fbarrel-screw\u002Fshot-size","d0u4ulkgStam3xPH4-PqX00gGA-p1TRueAmrG49V-PU",[523,527,531,535,539,543,547,551,555,559,563,566,570],{"path":524,"title":525,"short":526},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew","Injection molding screw: parts, zones and types","Screw",{"path":528,"title":529,"short":530},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel","Injection molding machine barrel: construction, zones and wear","Barrel",{"path":532,"title":533,"short":534},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fcheck-ring","Check ring (non-return valve) of an injection molding screw","Check ring",{"path":536,"title":537,"short":538},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fscrew-tip","Screw tip of an injection molding machine: types and removal","Screw tip",{"path":540,"title":541,"short":542},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle","Injection molding machine nozzle: tip, size and design","Nozzle",{"path":544,"title":545,"short":546},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fshut-off-nozzle","Shut-off nozzle for injection molding: types and uses","Shut-off nozzle",{"path":548,"title":549,"short":550},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fnozzle-filter","Injection molding nozzle filter: types, use and cleaning","Nozzle filter",{"path":552,"title":553,"short":554},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbarrel-head","Barrel head (front flange) of an injection molding machine","Barrel head",{"path":556,"title":557,"short":558},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fhopper-and-feed-throat","Hopper and feed throat of an injection molding machine","Hopper and feed throat",{"path":560,"title":561,"short":562},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fbimetallic-barrel","Bimetallic barrel and screw for injection molding machines","Bimetallic barrel",{"path":564,"title":565,"short":407},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fl-d-ratio","Screw L\u002FD ratio and compression ratio in injection molding",{"path":567,"title":568,"short":569},"\u002Finjection-molding-machine-parts\u002Fbarrel-screw\u002Fback-pressure","Back pressure in injection molding: what it does and how to set it","Back pressure",{"path":571,"title":572,"short":573},"\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":576},{"title":577,"description":578,"base":579,"labels":590,"items":601},"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":580,"line":582},[581],"M470 118h14v104h-14z",[583,584,585,586,587,588,589],"M484 124L520 124","M484 216L520 216","M142 212L466 212","M142 207L142 217","M240 207L240 217","M340 207L340 217","M466 207L466 217",[591,595,598],{"x":592,"y":593,"text":594},191,228,"METERING",{"x":596,"y":593,"text":597},290,"COMPRESSION",{"x":599,"y":593,"text":600},403,"FEED",[602,617,634,646,677,690,714,727],{"id":603,"name":542,"role":604,"parts":605,"marker":607,"shapes":611},"nozzle","Screws into the front of the barrel and seals against the mold’s sprue bushing. The melt passes through it on every shot.",[606],"MC-BC-07",[608,609,608,610],52,24,156,{"solid":612,"hidden":615},[613,614],"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",[616],"M34 170L88 170",{"id":618,"name":619,"role":620,"parts":621,"marker":623,"shapes":626},"front-flange","Barrel front flange","Also called the front head or end cap. It closes the front of the barrel and holds the nozzle.",[622],"MC-BC-08",[624,609,624,625],98,144,{"solid":627,"line":629,"hidden":632},[628],"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",[630,631],"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",[633],"M90 170L108 170",{"id":508,"name":530,"role":635,"parts":636,"marker":637,"shapes":640},"Thick steel tube the screw turns in. Bimetallic barrels have a hard alloy lining that resists wear from glass-filled and abrasive plastics.",[514,515],[638,609,638,639],188,146,{"solid":641,"line":643},[642],"M108 146h362v48h-362z",[644,645],"M108 156L470 156","M108 184L470 184",{"id":647,"name":526,"role":648,"parts":649,"marker":651,"shapes":656},"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.",[650],"MC-BC-02",[652,653,654,655],230,336,232,178,{"solid":657,"line":660},[658,659],"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",[661,662,663,664,665,666,667,668,669,670,671,672,673,674,675,676],"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":678,"name":679,"role":680,"marker":681,"shapes":685},"screw-tip","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.",[682,653,683,684],122,128,183,{"solid":686},[687,688,689],"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":691,"name":692,"role":693,"subcategory":28,"marker":694,"shapes":698},"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.",[695,609,696,697],330,313,138,{"solid":699},[700,701,702,703,704,705,706,707,708,709,710,711,712,713],"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":715,"name":558,"role":716,"marker":717,"shapes":720},"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.",[718,609,718,719],446,62,{"solid":721,"hidden":724},[722,723],"M410 62L482 62L462 110L430 110Z","M434 110h24v36h-24z",[725,726],"M434 146L434 156","M458 146L458 156",{"id":728,"name":729,"role":730,"parts":731,"subcategory":72,"marker":733,"shapes":737},"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.",[732],"MC-BC-06",[734,609,735,736],556,560,132,{"solid":738,"hidden":744},[739,740,741,742,743],"M520 128h8v84h-8z","M528 132h62v76h-62z","M590 128h8v84h-8z","M540 124h10v8h-10z","M570 124h10v8h-10z",[745,746],"M548 136h10v68h-10z","M528 170L548 170",[748,757],{"partNumber":514,"name":749,"subcategory":67,"subcategoryName":68,"shortDescription":750,"image":751,"inStock":511,"zone":232,"compatibleMachines":752},"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",[753,754,755,756],"Haitian MA Series","Haitian MA II Series","Haitian Jupiter Series","Yizumi A5 Series",{"partNumber":515,"name":758,"subcategory":72,"subcategoryName":759,"shortDescription":760,"image":761,"inStock":511,"zone":232,"compatibleMachines":762},"Screw Barrel Assembly","Seals & Bearings","Complete screw and barrel assembly for injection molding machine plasticizing unit.","\u002Fpart-images\u002FMC\u002FMC-BC-01\u002FMC-SB-01\u002F8a8d3cba-2faf-4123-8b59-514390486726.png",[753,763,754],"Haitian MA1600",1793548981303]