模具組成簡介

1、- 1 - / 9This trial version can use only a part of item.Function of Major PartsYou will learn about the names and functions of major partsused for an ejection system.A push back pin and a coil spring are used for regular molds, whereasa push back pin and a gas spring are sometimes used for large siz

2、emolds.This figure illustrates an example of a large mold.- 2 - / 9- 3 - / 9Eiuctcir眥口口曰Geis Suring Hold呂i自ctDGuidE PinRJyaaQGai鈦Etaririg占口UPL匸:k.PinMRJ-_1KQii- 4 - / 9Ejector Stopper (Stroke End Pin)A block that stops an ejector plate from going forward二stopPin- 5 - / 9Sprue Lock PinsA pin has the

3、edge of which is undercut to pull a part in mold ope ning andremove a sprue from a sprue bush.After mold ope ning, this pin will fun cti on as an ejector pin and ejects thesprue from a aprue bush. Also it releases gas contained in molte n plastic.Push Rod St叩PinCore Adaptor Plate- 6 - / 9Also called

4、 a push plate. A plate that supports an edge of an ejector pin ora push back pin to eject a part from a mold.It is ejected by an ejector device of a mold ing mach ine, andreturned to the original position when the edge of a push back pin collideswith a cavity plate during mold clamping.- 7 - / 9Cavi

5、 AdaptorPlateRunner StripperPlateCavity PlateInsert Part SectionStripper PlateSpacer BlackCare PlateCushion PlateSupport PlateSupport PinEjector Plate Upper SideEjector Plate Lower SideCore Adaptor PlateGuide Bush AGuide Bush BGuide PinPush Back PinEjector Fin- 8 - / 9Stop PinsA stopper in stalled t

6、o keep an ejector plate horiz on tal orprevent the ejector plate from retreating too far and damagingEjector Guide Pi ns / Ejector Guide BushAn ejector guide pin is also called a push plate guide pin and functions asa guide for sliding of an ejector plate.Because an ejector guide bush slides, a hard

7、 material is used.- 9 - / 9An ejector guide bush is also called a push plate guide bush.It is a cylindrical part used to determine the position by match ing theejector guide pi n.Push RodsA shaft linked to the force (hydraulic or mecha ni cal) of the moldi ng machine in order to get the ejector plat

8、e to work.Ejector 3uide PinEjector Guide BushEjector Plate- 10 - / 9Core Adaptor Plate/f|Power of Maldinq MachinePush PinI十Ejector EarGas Spring / Gas Spring HolderA gas springforcibly pushes back an ejector plate.stre ngth of the spri ng is adjusted by adjust ing the filli ng pressure.Whe n using a

9、 gas spri ng, make sure to avoid high temperature(heat may expand gas, deterioratingthe original functionsEjector Plate TVTheofGets SpringGas Spring Holder- 11 - / 9a gas spring).Calculating Filling PressureTo figure out filling pressure (P) from early load(Wo):P= 100 *Wo/C(C: constant)To figure out corresponding spring constant (K) fromfilling pressure (P) and gas spring constant (G):K=G*P/ 100To figure out force by displacement (x) from the topD.C. of the piston rod (W):W=P(Gx+C)* See the catalog of each manufacturer for constant (C)and gas spring constant (G).A gas