THIT K CH TO KHUN P NHA

THIT K CH TO KHUN P NHA

TRNG H S PHM K THUT HCMKHOA O TO CHT LNG CAO

THIT K CH TO KHUN P NHA

BO CO

GVHD: TRN MINH TH UYN SVTH : L VN TI MSSV:11144168

NI DUNG1 .GII THIU KHUN 2 TM

2 .GII THIU KHUN 3 TM

1 .GII THIU KHUN 2 TMI Khi nim:Khun 2 tm l loi khun c 1 mt phn khun bao gm. Phn c nh v phn di ngn gin l: m 1 ln ly sn phm v knh nha.II Cu to:

Hnh cu to ca khun 2 tm.

Chc nng cc b phn khun 2 tm :1.Vt lc gic : lin kt cc tm khun v to tnh thm m.2.Vng nh v: nh tm gi bc cung phun v vi phun..3.Bc cung phun: dn nha t my p phun vo cc knh dn nha.4.Khun ci: to hnh cho sn phm.5.Bc nh v: m bo v tr tng quan gia khun c v khun ci.6.Tm kp trc: gi cht phn c nh ca khun vo my p.7.V khun ci .

8.Cht hi: hi h thng y v v tr ban u khi khun ng.

9.Khun c: to hnh cho sn phm.

10.Cht nh v : dn hng v nh v khi khun ng.

11. V khun c.

12.Tm : tng bn cho khun trong qu trnh lm vic.

13.Gi : to khong trng tm y hot ng.

14.Tm gi: gi cc cht y.

15.Tm y: y cc cht y li sn phm ri khi khun.

16.Tm kp sau: Gi cht phn di ng ca khun p nha trn my p nha.

17.Gi ph: tng bn cho khun trong qu trnh p phun.

III.Nguyn L Hot ng : Ban u, phn bn my ca khun ng s chuyn ng t tri qua phi, mang theo phn khun ng. Trc dn hng v bc dn hng s dn hng cho 2 na khun ng v tnh.

Khi phn khun ng p vo phn khun tnh mt phn khun th my c s bm nha vo lng khun . Ty thuc vo ln ca sn phm, trong khong t 18 n 30 giy th nha s in y th nha s in y lng khun.

Sau h thng lm mt s hot ng . Lc ny trc y ca my c s y 2 tm y v ko theo l c h thng y sn phm ra khi lng khun

u im: So vi khun 3 tm th khun 2 tm n gin hn, r hn, chu k p gn hnVic thit k n gin. Kt cu khun khng i hi phc tp (khun ch c 2 phn core v cavity do ch cn m 1 ln ly sn phm v knh nha)

Thi gian gia cng v ch to khun cng ngn hn(s knh dn t).

Gi thnh thp hn khun 3 tm hay nhiu tng, khun 2 tm ch c 2 tm nn vt liu gia cng t v vic thit k khun t thi gian v cng sc nn nh gi thp hn.

Nhc im: Khun 2 tm ch s dng c cho c chi tit i hi c chnh xc thp hn so vi cc loi khun nhiu tm.

Qu trnh t ng ha hon ton trong qu trnh lm vic thp hn do khng c h thng ct i keo, h thng ny t ng tch ra trong qu trnh tch khun nn i keo vn cn ln.

Khun 2 tm th khng th dng gia cn nhng sn phm c phc tp cao. V s in y khun 2 tm l khng kim sot c, v cc sn phm ca khun 2 tm c rt t ming phun nn qu trnh a nha vo sn phm th rt lu c th gy nhiu bin dng cho sn phm

ng dng: ng dng vi nhng sn phm c vng i ngn nh mt hng in t, dn dng trong vng vi thng .

sn phm i t ming phun sn phm dn dng, dng c nhn, sn phm gia nh.

Nhng sn phm i hi thi gian thit k ngn v gia cng ngn cung ng th trng.

Sn Phm ca khun 2 tm:

2.GII THIU KHUN 3 TMI.Khi Nim: + Khun 3 tm c c rnh dn nha t gia khun ng v khun tnh. Runner nm gia tm trung gian(tm runner) v khun tnh. Khoang nm gia tm trung gian v khun ng.+ Khun hai tm thi h thng knh dn ca khun ba tm c t trn tm th hai song song vi mt phn khun chnh. Chnh nh tm th hai ny m knh dn v cung phun c th ri ra khi sn phm khi khun t m (t ct ui keo).+ Khun ba tm c s dng khi m ton b h thng knh dn khng th t trn cng mt phng nh khun hai tm. iu ny c th l do: Khun c nhiu lng khun. Khun c mt lng khun nhng phc tp nn cn hn mt vi tr phun nha. Kh khn trong vic chn ra mt vi tr phun thch hp khc. V phi cn bng ng nha gia cc knh dn vi nhau nn buc phi thit k knh dn khng nm trn mt phn khun.

II.Cu To V c im:IMC TRNG CA KHUN BA TM L T CT UI KEO:Khun ba tm c s dng khi m ton b h thng knh dn khng th t trn cng mt phng nh khun hai tm. v:

Khun c nhiu lng khun.

Khun c mt lng khun nhng phc tp nn cn hn mt vi tr phun nha.

Kh khn trong vic chn ra mt vi tr phun thch hp khc.

V phi cn bng ng nha gia cc knh dn vi nhau nn buc phi thit k knh dn khng nm trn mt phn khun.

imc trng ca khun ba tm l t ct ui keo.

III.Nguyn L Hot ng Ca Khun 3 Tm Knh dn ca khun ba tm c t th hai so vi mt phn khun chnh. Nh tm ny knh dn v cun phun c th ri ra khi sn phm khi khun m

Khi khun m,cc l xo gia tm v tm trung gian m bo cho tm gi chuyn ng vi tm chuyn ng, trong khi h thng knh nha vn gi nguyn bi trc ko cun phun. Kt qu ny lm cho cc ming phun b nt v tch h thng knh nha ra khi sn phm.

Cng lc tm m trn cng dch chuyn xung di lm cho knh nha tch ra khi cun phun.Tm gia s tip tc i theo tm chuyn ng ca khun cho n khi b nt chn trn phn khun di ng gi li. Khong dch chuyn phi d ln c di ca h thng nha thot ra c

Lc ny trc y ca my c s y 2 tm y v ko theo l c h thng y sn phm ra khi lng khun

u im: t bi hng hc hn khun c knh dn nng C th ph hp vi nhng vt liu chiu nhit km Gi thnh thp hn so vi khun hai tm c knh dn nngNhc im: Lng ph nhiu vt liu Cn gi p sut phun lu in y Chu k p phun tng do hnh trnh ca dng nha in y lng khun diTI LIU THAM KHO: THIT K V CH TO KHUN PHUN P NHA( T.S PHM SN MINH THS TRN MINH TH UYN)WEB THAM KHO : http://tai-lieu.com/tai-lieu/cong-nghe-che-tao-khuon-mau-khuon-hai-tam-1578/

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