A tlangpuiin, rubber molded products chu molding processing atan chuan a inmil mold kaltlangin mold a ngai a, rubber product chu temperature sang tak, high pressure vulcanization, mold cavity emaw mold core atanga lo chhuak hnua mold release tia hriat a ni tlangpui. Rubber thil siam quality chhiatna leh production efficiency-a nghawng a neih chhan pawimawh tak pakhat chu demolding ha lo a ni. Thil chhia a thlen thei a, chu chuan a then a tichhe thei a, a then phei chuan mold a tichhia a, normal production-ah harsatna a thlen thei bawk. Rubber thil siam demolding tichhe thei thil ha lo tak takte zir chianna hi thil siam hatna tur, chhiatna awm lo tur venna atan, scrap venna atan, leh thil siam chhuah ha zawka tihchangtlun nan thil pawimawh tak a ni.
1. Rubber thil siam demolding tichhe thei thil
Rubber products demolding tha lo tih awmzia ber chu product chu eject a nih chuan a tla tha thei lo tihna a ni. Hei hi thil nghawng nei tam tak avanga lo awm a ni a, heng thilte hi an inzawm tlat a, an nghawng dan leh an lantir dan pawh a inang lo hle a, a bik takin rubber product design, mold design leh siam dan, production process, operation method, mold maintenance, etc. te a ni.
1.1 Rubber product design-in mold release a nghawng dan
Rubber product design hian product release performance a nghawng nghal a, chuvangin product design hian product te awlsam taka demolding theihna tur thil mamawh a tlin tur a ni. Product design-a demolding nghawngtu ber chu demolding slope a ni a, mold hawn a, product chhuah chhuah theih nan vertical parting surface chhung leh pawn lam chu demolding slope tling tak siam tur a ni. Product thenkhat chuan demolding slope nei mahse, a hlutna chu a tlem lutuk a, product thenkhat chuan pawn lam slope chauh an nei a, chhung lam leh chhung lam ribs slope leh perseverance ngaihthah lovin Product thenkhat chuan slope an nei lo tak tak a, hei hian product demolding-ah harsatna a thlen thin. Product a bak hnuah centripetal shrinkage hi product cooling vang a ni a, chu chuan core emaw pin emaw ah holding force lian tak a siam a, chu chuan demolding a tikhawlo a ni. Demolding slope tihsan a nih chuan he resistance hi nasa takin a tlahniam thei a, slope awm lohna avanga product tearing ang chi defect te pawh a awm thei bawk. Demolding slope hi product pianzia leh a thickness nen a inzawm a, a tlangpuiin empirically-a teh a ni a, general product slope chu 1 ° ~ 3 ° inkar a ni.
1.2 Mould design leh manufacturing-in mold release a nghawng dan
1.2.1 Mould release-a mold design-in nghawng a neih dan
Rubber mold hi rubber product siamna atana hmanraw lian ber pakhat a ni a, mold pressing principle hi injection mold, die casting mold-ah then theih a ni a, pressing mold design hi a pianzia, a mizia leh a hman dan tur ang zela siam a ni a, rubber product inang ang chiah hian structure hrang hranga mold engemaw zat design tur a ni. Mold structure hi product quality, production efficiency, mold processing harsatna leh service life nen a inzawm tlat a ni. Chuvangin mold structure design research hi a pawimawh khawp mai. Rubber products te hian geometry dik tak leh dimensional accuracy engemaw zat an neih theih nan mold structure design hian a hnuaia principle te hi zawm tur a ni:
(1) Rubber siamna atana hman tur thilte khauhna, a tihtlem leh hman dan tur thiam leh hriatthiam.
(2) Product chu a pianzia leh a contour chu enfiah rawh.
(3) Mould structure chu a awlsamin a remchan dan angin a awm tur a ni a, a dahna tur chu rintlak a ni tur a ni a, a dahna leh a thenfai pawh a awlsam tur a ni a, a hman awlsam tur a ni bawk.
(4) Mould cavities awm zat chu a dik a, chu chu machining leh mold hmanna atan a remchang a, production efficiency ngaihtuah tur a ni.
(5) Mold chuan chakna leh rigidity tling tak a nei tur a ni a, a pianzia chu a te, a rit lo, a siam awlsam, leh a siam chhuah dan nena inmil turin a bei tur a ni.
(6) Mould cavity chu product load leh lakchhuahna atan a remchang tur a ni a, vulcanizing-ah chuan rubber material hian pressure tling tak a nei tur a ni.
(7) Mould hian a dikna engemaw chen, a finish leh a thenfai theihna tur a nei tur a ni a, chu chu trim awlsam tak a ni.
(8) Mold chu tihfai awlsam zawk nan rubber groove chhe tawh tak a nei tur a ni.
(9) Mould design chu serialization leh standardization nena inmil tur a ni a, versatility tha tak neih tum tur a ni.
Mould design-a thil mamawh atang chuan thil siamte demolding tichhe thei thilte chu mold stiffness, demolding resistance, ejection mechanism, etc. te a ni tih a hriat theih.
1.2.1.1 Mold khauh lutuk
Rubber mold-ah hian combined mold hman a ni tlangpui a, chuvangin mold-ah hian interference fit emaw gap fit emaw a awm thin. Production process-ah chuan clamping force emaw injection pressure emaw action hnuaiah mold parts te chu elastic deformation an nei duh hle a, mold hawn a nih chuan heng deformations te hian steel leh steel surface inkarah friction a siam ang. Elastic rebound a lian chuan rubber leh mold surface inkarah extrusion force a siam bawk ang a, frame lai tak chu arc-ah a chang ang a, rubber material chu curved frame seam atang hian a chhuak ang. Chumi avang chuan mold hawn theihna a sang a, chu chuan demolding a harsat phah a, chu chuan product chu a ti chhe a, mold pawh a scrap thei bawk (a tlangpuiin product hian steel skeleton material a nei a ni). Chuvangin, mold design-ah chuan molded parts te chu rigidity tling tak an neih theih nan a enfiah tur a ni.
1.2.1.2 Demolding do theihna
Product chu demolded a nih chuan mold opening resistance leh ejection resistance te chu hneh a ngai a ni. Mould release ha lo avanga product quality chhiatna tam zawk hi chu hei nen hian a inzawm tlat a ni. Ejection resistance hi a bulpui ber chu product-in a core thlenga a holding force atanga lo chhuak a ni a, chutah chuan shrinkage, extrusion, bonding leh rubber leh steel surface inkara friction avanga force awm te pawh a tel a ni. Heng force te hi add up emaw, kawng hrang hranga inzawmkhawm emaw a ni a, chu chuan product release a nghawng a ni.
1.2.1.3 Ejection hman dan tur
Ejection mechanism hian ejection effect chu direct-in a nghawng a, demoulding ejector rod hi a tlangpuiin mold lairil position-ah dah a ni a, demoulding ejector rod cross-sectional area pawh a tlem lutuk tur a ni lo, unit area khata force tam lutuk ven nan, thin products top break emaw steel skeleton deformation nei products siam a awlsam hle. Area lian leh rit rit tak tak siam chhuah hunah chuan ejection action jamming emaw ejector rod bending emaw avanga friction nasa lutuk ven nan mold pad-ah demolding guide block ¢100mm vel dah tur a ni a, a aia tam mold ejector rod assembly set up tur a ni a, mahse a balance a ngai a ni.
1.2.2 Mold siamnain mold release a nghawng dan
Mould siam chhung hian insert structure-a cavity, core surface roughness, leh mating surface gap te kha khauh taka enfiah tur a ni a, chuti lo chuan product-a mold release a nghawng dawn a ni. Insert leh mating surface inkar gap hi a lian lutuk a, rubber hian a lum chuan fluid property a nei a, mold filling process-ah rubber hi a squeeze awlsam a, thick flash a siam a, hei hian demolding leh product appearance chu nasa takin a tikhawlo a ni. Chu bakah, deep-cavity thin-walled products tan chuan eject a nih chuan a part leh core chung lamah vacuum a lo awm a, chu chuan demolding a harsat phah a ni. Chuvangin, mold siam a nih hian core hian air intake holes mumal tak a nei tur a ni emaw, core surface chu a rough deuh (product quality tichhe lovin) a ni tur a ni a, chu chuan mold release atan a tha hle.
1.3 Mold release-a production process parameter-te nghawng dan
Production process parameters hi products quality defects nen a inzawm a, chung zingah chuan injection pressure, holding pressure pressure, vulcanization temperature, glue content, vulcanization time, etc. te hian demolding ah nghawng lian tak a nei a ni. Injection pressure a san lutuk chuan mold parts te chu elastic deformation a siam ang a, extrusion force a siam ang. Holding time a rei lutuk chuan mold cavity chhunga pressure a sang a, chu chuan shear force leh molecular orientation stress a tisang ang. Chutih rual chuan holding pressure injection force a sang lutuk a, hun a rei lutuk bawk a, hei hian process filling a thlen bawk ang a, internal stress lian tak a siam ang a, mold parts te deformation emaw mating surface inkara flash emaw a thlen bawk ang a, demolding a ti harsa zual ang. Vulcanization temperature, rubber content rate, vulcanization time te hi rubber shrinkage rate nen a inzawm a, vulcanized rubber hi temperature sang takah chuan original phenomenon-ah kir leh a awlsam a, vulcanization hnua rubber shrinkage rate lian tak, vice versa, shrinkage tenau te. Rubber content rate a san chuan a shrinkage a sang a, rubber content a hniam a, a shrinkage a tlem a, vulcanization time a rei zawk a, cross-linking degree a sang zawk a, shrinkage rate a tlem a, vulcanization time a tawi a, crosslinking time a tlem a, shrinkage rate a lian a, process lamah pawh shrinkage rate a lian a, the shrinkage rate hi under-vulcanization emaw per-vulcanization-ah a lian a, minimum shrinkage rate chu positive vulcanization point-ah chauh a lian a, complex core leh insert structure nei mould holding force pawh a lian a, hei hian product demolding atan a tha lo.
1.4 Mould release-a operation method-in nghawng a neih dan
Mold pahnih, rubber material inang hmanga siam leh process flow inang hmanga siam ang chi, operator thiamna leh hmanraw hrang hrang avang hian release effect hmuh pawh a danglam hle. Chuvangin, demolding effect tha tak neih theih nan product demolding method hi hriat chian leh thiam a ngai a ni. Release dan dik tak tlemte chu hetiang hi a ni:
(1) Manual demolding hi rubber product-te’n mold cavity leh mold core atanga product an lak chhuah dan pakhat a ni a, hei hi part tenau chi hrang hrang leh rubber product hardness sang tak nei tan a tha hle.
(2) Mechanical demolding hi injection molding mold, die-casting mold leh rubber product lian dangte atan hman a ni ber.
(3) Air demolding chu compressed air emaw vacuum suction cup hmanga thil siam chhuah chhuah a ni a, a thil langsar ber chu: mold structure tih awlsam, hawn leh khar hun tawi, hnathawk chakna tihtlem, leh thil siam chhuah efficiency tihchangtlun hi a ni.
(4) Deformation demolding hi rubber elasticity leh elongation tha tak hman a ni ber a, forced compression emaw elongation deformation emaw hmanga demolding effect hmuh theihna tur a ni.
(5) Mold core demolding chu demolding laiin center mold core knock out emaw press out emaw a ni a, chutah chuan mold chu demold turin hawn a ni a, hei hian product quality leh demolding effect enfiahna atan a tha hle.
(6) Insert demolding hi complex zawk emaw, insert nei product emaw tan a tha.
1.5 Mold enkawl danin mold release a nghawng dan
A pair of moulds with reasonable structure, a service life tih rei nan leh product quality a nih theih nan, uluk taka hman bakah, mold enkawl dan pawh i ngaihven tur a ni. Mould hman zawh hnuah a hnuaia thilte hi enfiah a ngai a ni:
(1) Mold chu a deformed em tih, a bik takin mold cavity emaw mold frame emaw. Mould chu a deform hnuah chuan rubber products steel skeleton emaw, hardness sang emaw hmanga demolding atan a tha lo.
(2) Mating part-ah hian loosening leh hair pulling a awm leh awm loh. Mould chu a chhuah leh chhuah chuan gap leh mark a awm ang a, rubber material chu a hrual hnuah chuan mold chu chhuah a harsa a, product pawh a tikehsawm thei bawk.
(3) Positioning hi rintlak a nih leh nih loh. Mould cavity hi a tlangpuiin template tam tak dahkhawm atanga siam a ni a, positioning dik lo chuan mold chu gap emaw deformation emaw a thlen ang.
(4) Mould cavity chunglam chu a hrual em tih leh eng angin nge fouling situation a awm. Mould cavity a rust emaw foul emaw hnuah demolding process chhung hian friction lian tak a awm ang a, chu chu product demolding atan a tha lo.
(5) Mould chhunga movable matching core leh ejector accessories te chu a kim tawh em tih.
A chunga kan sawi ang harsatna te hi a awm a nih chuan mold chu siam that, tihfai, rustproof, etc.
2 Fimkhur tur
A chunga kan sawi tak hian thil chi hrang hrangte’n thil siam chhuah (demolding)-a nghawng a neih dan a zirchiang a, nghawng nei thil tinte tan a inmil tur countermeasures a siam a ni. Mould release ha lo tur venna atana hmalakna bulpui ber berte chu hetiang hian boil down theih a ni:
(1) Product structure hi demold a awlsam a, demolding slope tling tak a awm tur a ni.
(2) Mold structure chu a remchang a, mold stiffness pawh a theih ang anga tihchangtlun a ni.
(3) Production process parameters chu a remchan dan anga ruat.
(4) Hnathawktute hnathawh dan (operation level) tihchangtlun.
(5) Mould enkawl dan ngaihven rawh.
(6) Friction tihtlem la, mold release agent dik tak hmang rawh.
(7) Viscosity formula dik leh dik tak thlang rawh.
