A tlangpuiin, rubber molded products chu molding processing atan a inmil mold hmanga mold a ngai a, temperature sang tak hnua rubber product, high pressure vulcanization, mold cavity emaw mold core atanga mold core atanga mold release tia hriat lar a ni. Demolding tha lo hi rubber products quality defects awm chhan pawimawh tak pakhat leh production efficiency-a nghawng a neih chhan pawimawh tak pakhat a ni. A parts distortion leh tearing ang chi defect a thlen thei a, thenkhat chuan mold pawh an tichhia a, normal production-ah harsatna an thlen thei bawk. Rubber products tihchhiatna nghawngtu thil tha lo tak takte zir chian chu thil siam chhuah quality tha tak a nih theih nan, a chhiatna tur venna tur, scrap venna tur leh thil siam chhuah thatna tur a siam that theih nan a pawimawh hle.

1. Rubber thil siam chhuah tihchhiatna thlentu thilte .

Rubber products demolding tha lo tihna ber chu product eject a nih chuan a tlakbuak thei lo tihna a ni ber. Hei hi influencing factor tam tak avanga lo awm a ni a, heng factors te hi an inzawm tlat a, an influence leh expression degree pawh a danglam a, a bik takin rubber product design, mold design leh manufacturing, production process, operation method, mold maintenance, etc. te pawh a huam tel a ni.

1.1 Rubber product design hian mold release a nghawng dan .

Rubber products design hian direct-in product release performance a nghawng a, chuvangin products design hian awlsam taka thil siam chhuah demolding mamawh a phuhruk tur a ni. Product design-a demolding nghawngtu ber chu demolding slope a ni a, mold hawn theihna tur leh product lak chhuah nan, vertical parting surface chhung leh pawn lam chu demolding slope tling tak pek tur a ni. Thil siam ṭhenkhat chuan demolding slope nei mah se, a hlutna chu a tlem lutuk a, thil siam ṭhenkhat chuan a pawn lam slope chauh a nei a, a chhung lam leh a chhunga ribs leh chhelna chu ngaihthah a ni a Product thenkhat chuan slope an nei lo tak tak a, chu chuan product demolding-ah harsatna a thlen a ni. Product an siam zawh hnuah centripetal shrinkage hi a 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 a san chuan he resistance hi nasa takin a tlahniam thei a, slope awm lohna avanga product tear ang chi defects te pawh a awm lo thei bawk. Demolding slope hi a pianzia leh a thickness nen a inzawm a, a tlangpuiin empirically-in an teh a, general product slope chu 1 ° ~ 3 ° inkar a ni.

1.2 Mold design leh manufacturing in mold release a nghawng dan .

1.2.1 Mold design hian mold release a nghawng dan .

Rubber mold hi rubber product siamna atana hmanraw pawimawh ber pakhat a ni a, mold pressing principle chu injection mold, die casting mold-ah then theih a ni a, pressing mold design hi a pianzia, a nihna leh a hman dan azirin, rubber products ang chiah a zirin structure hrang hrang mold engemaw zat design turin a ni. Mold structure hi thil siam quality, production efficiency, mold processing harsatna leh service life te 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 tak an neih theih nan mold structure design hian a hnuaia principle te hi a zawm tur a ni:

(1) Rubber thil siamna atana hman tur thilte chu a khauhzia, a tihtlem dan leh a hman dan tur a hriat chianzia leh a hman dan tur hriatthiam.

(2) Product awm dan leh contour enfiah.

(3) Mold structure chu a awlsam leh a remchan dan tur a ni tur a ni a, positioning chu rintlak a ni tur a ni a, installation leh disassembly pawh a awlsam tur a ni a, hman awlsam tur a ni bawk.

(4) Mold cavities awm zat hi a dik a, chu chu machining leh mold hmanna atan a remchang a, production efficiency pawh ngaihtuah tel tur a ni.

(5) Mold hian chakna leh rigidity tling tak a nei tur a ni a, a pianziaah te, a rit zawng a rit a, a siam awlsam a, a siam chhuahna kalphung nen a inmil tur a ni.

(6) Mold cavity chu product phurh leh lak chhuah nan a remchang tur a ni a, vulcanizing a nih chuan rubber material chuan pressure a nei tling tur a ni.

(7) Mold hian dikna engemaw zat, finish leh reasonable parting surface a nei tur a ni a, chu chu trim awlsam tak a ni.

(8) Mould hian rubber groove chhe tawh a nei tur a ni a, chu chuan tihfai a awlsam phah tur a ni.

(9) Mold design chu serialization leh standardization nen a inmil tur a ni a, versatility tha tak neih a tum tur a ni.

Mold design-a thil mamawh aang chuan, thil siam chhuah tihchhiatna nghawngtu thilte chu mold stiffness, demolding resistance, ejection mechanism, etc. te a ni tih a hriat theih.

1.2.1.1 Mold a nghet .

Rubber mold hian a tlangpuiin combined mold a hmang a, chuvangin mold-ah hian interference fit emaw gap fit emaw a awm a ni. A siam chhuahna kawngah chuan clamping force emaw injection pressure emaw action hnuaiah chuan mold parts te chu elastic deformation an nei awlsam a, mold an hawn chuan heng deformation te hi steel leh steel surface te inkarah friction a thlen ang. Elastic rebound a lian chuan rubber leh mold surface inkarah extrusion force a siam bawk ang a, frame lairil chu arc a nih tir ang a, rubber material chu curved frame seam atang chuan extrude a ni ang. Chumi avang chuan mold hawn theihna a pung a, chu chuan demolding a ti harsa a, chu chuan product chu a ti chhe a, mold pawh a ti chhe vek a ni (a tlangpuiin product hian steel skeleton material a nei a ni). Chuvangin, mold design hian molded parts te hian rigidity an neih theih nan a enkawl tur a ni.

1.2.1.2 Hmelma dona .

Product demold a nih chuan mold opening resistance leh ejection resistance te hneh a ngai a ni. Mold release tha lo avanga product quality defect tam zawk hi chu a inzawm tlat a ni. Ejection resistance hi a bul berah chuan product-a holding force atanga lo chhuak a ni a, chutah chuan shrinkage, extrusion, bonding leh rubber leh steel surface inkar friction avanga lo awm force te pawh a tel a ni. Heng force te hi add up emaw, product release dan tur a nghawng theih nan kawng hrang hrangin an inzawm khawm emaw a ni.

1.2.1.3 Ejection hman dan tur .

Ejection mechanism hian direct takin ejection effect a nghawng a, demoulding ejector rod chu a tlangpuiin mold centre position-ah dah a ni a, demoulding ejector rod cross-sectional area chu a tlem lutuk tur a ni lo, unit area khata force tam lutuk lo turin, steel skeleton deformation hmanga top break emaw product emaw siam a awlsam hle. A hmun zau tak leh a rit lutuk siam chhuah hunah, ejection action jamming emaw ejector rod bending avanga friction tam lutuk lo awm tur ven nan, mold pad-ah hian demolding guide block ¢100mm vel a awm tur a ni a, a aia tam pawh set up mold ejector rod assembly dah tur a ni a, mahse a balance a ngai a ni.

1.2.2 Mold siamnain mold release a nghawng dan .

Mold siamna process chhung hian cavity, core surface roughness, leh insert structure mating surface gap te chu khauh taka enfiah tur a ni a, chutiang a nih loh chuan product release a nghawng dawn a ni. Insert leh mating surface inkar gap hi a lian lutuk a, rubber hian a lum laiin fluid property a nei a, rubber chu mold filling process laiin squeeze a awlsam a, flash thick tak a siam a, chu chuan demolding leh product appearance chu nasa takin a tikhawlo a ni. Chu bakah, deep-cavity thin-walled products tan chuan, ejected a nih chuan, part leh core chunglamah vacuum a lo awm a, chu chuan demolding-ah harsatna a thlen a ni. Chuvangin, mold siam a nih chuan a core chuan air intake holes dik tak a nei tur a ni a nih loh chuan core surface chu a rough deuh (product quality a nghawng lo), chu chu mold release theihna tur a ni.

1.3 Mold release-a production process parameter-te nghawng dan .

Production process parameters te 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 hian nghawng nasa tak an nei a ni. Injection pressure a san lutuk chuan mold parts te elastic deformation a thlen ang a, extrusion force a thlen ang. Holding time a rei lutuk chuan mold cavity-a 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, a hun a rei lutuk a, chu chuan process filling a thlen bawk ang a, internal stress lian tak a siam ang a, mold parts emaw mating surface inkar flash emaw a ti chhe bawk ang a, demolding a ti harsa zawk ang. Vulcanization temperature, rubber content rate, vulcanization time hi rubber shrinkage rate nen a inzawm a, vulcanized rubber chu a awlsam a, a original phenomenon-ah a siam awlsam a, temperature sang takah a awm leh a, vulcanization hnua rubber shrinkage rate lian tak a ni a, a lehlamah, a tlahniam lo hle bawk. Rubber content rate a san chuan a tlahniam tam poh leh rubber awm zat a hniam chuan a tlem poh leh vulcanization hun a tlem zawk a, cross-linking degree a sang zawk a, a tlahniam rate a tlem a, vulcanization hun rei lo zawk a awm a, crosslinking hun a tlem a, shrinkage rate chu a lian hle a, shrinkage rate chu process-ah a lian hle a, shrinkage rate chu a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate pawh a lian hle a, shrinkage rate hi a lian zawk a, shrinkage rate pawh a lian hle a, shrinkage rate hi a lian zawk a ni. Per-vulcanization, leh minimum shrinkage rate chu positive vulcanization point-ah chauh a lian a, complex core leh insert structure nei mold-a holding force pawh a lian hle a, chu chu product demolding atan a tha lo hle.

1.4 Mold release-a hman dan kalphung nghawng .

Rubber material inang hman leh process flow inang hman ang chi mold structure tha tak tak pahnih, operator thiamna leh method hrang hrang avang hian release effect hmuh pawh a danglam hle. Chuvangin, demolding effect tha tak kan hmuh theih nan product-a demolding method hriat chian leh master a ngai a ni. A release dan tur dik tak tlemte chu hetiang hi a ni:

(1) Manual demolding hi rubber products ten mold cavity leh mold core atanga product an lak chhuah dan pakhat a ni a, hei hi miscellaneous parts te te leh rubber products hardness sang tak nei te tan a tha hle.

(2) Mechanical demolding hi injection molding mold, die-casting mold leh rubber product lian dangte atan hman a ni tlangpui.

(3) Air demolding chu compressed air emaw vacuum suction cup hmanga thil siam chhuah a ni a, a thil langsar ber chu: mold structure awlsam zawk siam, hawn hun leh khar hun tawi, labour intensity tihtlem, leh production efficiency tihsan te a ni.

(4) Deformation demolding chu elasticity leh elongation tha tak, forced compression emaw elongation deformation hmanga elongation tha tak hman a ni ber a, chutiang chuan demolding effect a hmu thei ang.

(5) Mold core demolding chu demold laiin center mold core chu knock out emaw press out emaw a ni a, chutah chuan mold chu demold turin hawn a ni a, chu chu product quality leh demolding effect tih chian nan a tha hle.

(6) Insert Demolding hi complex zawk emaw, insert nei product emaw tan a tha.

1.5 Mold enkawlna hian mold release a nghawng dan .

A pair of molds with reasonable structure, a service life tihzauh nan leh product quality a awm theih nan, uluk taka hman bakah mold enkawlna lam pawh i ngaihven tur a ni. Mold hman zawhah a hnuaia thilte hi enfiah tur a ni:

(1) Mold a chhe em tih te, a bik takin mold cavity emaw mold frame emaw a nih leh nih loh. Mold a lo inthlak hnuah chuan rubber products steel skeleton emaw high hardness emaw hmanga demolding atan a tha lo.

(2) Mating part-ah hian loosening leh sam hrual a awm leh awm loh. Mold a lo chhuah leh a chhuah chuan gap leh mark a awm ang a, rubber material a squeeze hnuah chuan mold chu chhuah a harsa a, product pawh a phelh a harsa bawk.

(3) Positioning chu rintlak a nih leh nih loh. Mold cavity hi a tlangpuiin template tam tak dahkhawm a siam a ni a, positioning dik lo chuan gap emaw mold deformation emaw a thlen ang.

(4) Mold cavity chunglam chu a smooth em tih leh engtin nge fouling situation a nih leh nih loh. Mold cavity chu a rust emaw, a foul emaw hnuah, demolding process chhungin friction lian tak a lo chhuak ang a, chu chu product demolding atan a tha lo ang.

(5) Mold chhunga movable matching core leh ejector accessories te chu a zo tawh em tih.

A chunga harsatna kan tawhte hi a awm a nih chuan, mold chu siamthat, tihfai, rustproof, etc. te a ni tur a ni.

2 Fimkhurna .

A chunga kan sawi tak hian thil chi hrang hrangte’n thil siamte an tihchhiat theihna tura nghawng a neih dan a zirchiang a, influencing factor tin atan a inmil tur countermeasures a dah chhuak bawk. Mold release tha lo awm lo tura hmalakna bulpui ber chu hetiang hian boil down theih a ni:

(1) Product structure hi demold awlsam tak a ni a, demolding slope tling tak a awm tur a ni.

(2) Mold structure chu a remchang a, mold stiffness chu a theih ang angin a ti tha zawk a ni.

(3) Production process parameters te chu a remchan dan angin a ruat ang.

(4) Hnathawktute hnathawh dan level tihsan.

(5) Mold enkawl dan ngaihven rawh.

(6) Friction tihtlem leh mold release agent dik tak hman.

(7) Viscosity formula remchang leh remchang thlang rawh.