NGHIEN cufu - TRAO Ddl
,1 HUdNG Tdl TU DONG HOA QUA TRINH TAO MANG MONG DANG TRON TCr NGUYEN LIEU GAO Ml
TOWARDS AUTOMATION PRODUCTION PROCESS TO CREATE THIN MEMBRANE FROM RICE FLOUR
TrSn Doan Son", Nguyin Tuin Le Giang', NguySn Van BSc' 'Khoa Co khi, Trucmg Dai hpc Bach IChoa, Dai hpc Qufic gia TR Hfi Chi Minh
^ Cong ty TNHH Robert Bosch Engineering and Business Solutions Vietnam
^NCS tai Truong Dai hpc Bach Khoa, Dai hpc Qufic gia TR Hfi Chl Minh TOM TAT
Trong nhieu ndm qua, bdnh trdng gao duac sdn xudt chit yeu bdng thit cong do do ndng sudt khong cao. chdt lucmg khong dong deu, khong ddm bdo ve sinh an todn Ihuc phdm, dgc biel lit khong CO ke hogch sdn xudt vdphu thugc vdo dieu kien thai tiet. Bdnh trdng hien nay duac sdn xudt bdng mdy bdn tu dgng a dang bang chU nhal rdi dem di cdl Iron, ddn den co phu phdm (khodng 35%), nen hieu qud kinh le chua cao. Ngodi ra, bdnh trdng sau khi dugc sdn xual raphdi Irai len phen tre vd dem di phai kho a ngodi Irai, do do bui bdn, vi sinh co the bdm vdo Ihdnh phdm nen khong ddm bdo lieu chudn ve sinh.
Trong bdi viel ndy, chung toi trinh bdy gidi phdp tgo mdng mong dgng Iron lit nguyen li^u ggo mi Iheo phucmg phdp in ddp lap hot long, tit true Igo hinh cao su len be mat bdng Idi vdi Iheo huang tu dong hoa khep kin ddy chuyen, de dp dung trong viec sdn xudt bdnh trdng ggo dgng Iron nhdm ddm bdo yeu cdu ve sinh thuc phdm, ndng cao hieu qud kinh te.
Tu- kh6a: Bdnh trdng ggo; Mdng mong dgng Iron; In dap, hu&ng lai lu dgng hoa.
ABSTRACT
For many years, rice paper is made by hand so the productivity is not high; Ihe quality is not uniform, does not assure Ihe food hygiene, especially the production schedule depends on Ihe weather Recently, some topics lo mechanize Ihe rice pgper production are researched and applied successfully so Ihat Ihe productivity and quality of product is improved. However, the rice paper is produced as a square shape and has to be cut into a round shape later. This step leads too much remainder of materials (about 35%) so Ihe economic efficiency is not high. During the production, rice paper is spread on a bamboo grill and basked in the sunlight so thai the dust or germ may harm the final product and not assure the food hygiene standard.
In this article, we introduce Ihe solution to create the thin membrane from rice flour by stamping the liquid material from forming shaft into cloth conveyor towards aulomalion lo apply in rice paper production, assure the food hygiene and increase economic efficiency.
Keywords: Rice pgper, thin membrgne by round shape, stamping, towards aulomalion.
ISSN 0866 - 7056
TAP CHI CO KHi VIET NAM, S6 6 nSm 2015 HTVTv.cokhivietnam.vn
NGHIEN CUTU-TRAO Ddl
1. GKJl THIEU len se lam chin banh. Nguoi tha dung diia tachbanh ra khoi tdm vdi vd trdi len phen tre roi dem Vipt Nam Id mroc nong nghiep vd la mot di phoi.
trong nhung nuac xudt khdu gao hang ddu tren the gicri. Cac san pham dupc che bien tu gao rat phong phli, ddc biet la banh trdng. Banh trdng dupc san xudt tir nguyen li8u bpt gao (them nguyen liSu phu la bpt ndng) co dang hmh tron hay hinh vuong va mat bdnh co van.
Hinh 3: Ldm bdnh trdng thu cong Qud trinh phai bdnh trdng thanh pham a ngodi troi nen bui, vi sinh co the nhiem vdo sdn pham nen khong dam bdo ti^u chudn ve sinh an toan thuc phdm, khong dat chi tieu xudt khdu.
Ben c?inh do, qud trinh phcri con phu thupc nhieu vdo dieu kien thai tiet nen khong co ke hoach sdn xudt cu the. Do vay, can phai co mpt gidi phdp tu dpng hoa qua trinh san xudt banh trdng gao dang tron de khdc phuc cdc vdn de tren.
2. NGHIEN CUtJ GIAI PHAP TAO MANG MONG Tir NGUYEN LIEU GAO MI
Khi chung ta cho hai vdt the tiep xiic vdi nhau, mpt vat the dang s§t vd mpt vdt the dang ran thi anh huang tuong tdc giGa chiing se xdy ra hien tuprng in dap hinh hpc ciia vdt the dang set long len vat the dang ran. Nguyen ly ndy duac minh hpa bang hinh ve sau:
Hinh 1: Dgng hinh hoc cua bdnh trdng Bdnh trang dang vuong hien nay duac trdng bang may ban tu dpng, sau do trdi len phen roi dem di phai. De thu dupc bdnh trdng tron, nguai ta dem bdnh trang vuong di cdt tron, ddn d§n phu pham nhieu, khoang 35% nen hi8u qua kinh te chua cao.
Hinh 2- Phyt phdm ciia bdnh trdng sau khi cdt tron Bdnh trang dang tron thi vdn duac sdn xudt thii cong bang tay voi cong nghe truyen thong. Gao dupc xay nhuyen vai nuac, cpng them phu gia Id bpt nang thanh hon hap dang sfit. Nguofi tha se phii mot tdm vai mong len noi nuac soi roi dung muong miic nguyen lieu vd do len tam vdi. Tay nguai thp se xoay tron de tao bien dang tron cho banh trdng roi dong nap noi lai vd giu trong khodng 5-10 gidy. Hai nong hoc
1 , Vjl Ihc 1 chuyen d^ng trod 2 : V|l ihe 2 chuyeii d^og Ijnb Den 3 : Lt!rp b^l i V g Sft (b^) g^o. b^l IAD)
Hinh 4: Nguyin ly tgo hinh
ISSN 0866 - 7056
TAP CHf CO KHf VIET NAM, S6 6 ndm 2015 www.cokhivietnam.vn
NGHIEN cufu-TRAODdl
Ta nhdn thdy:
• Khi V, = v^: Ln dap khong trupl.
• Khi Vj i^ v^: In dap co trupt.
Khi vdt thg (1) CO bien dang nhu hinh 5 (tron) va v^ = v^ thi hien tuang in dap khong truat xdy ra, ta co mpt lap bpt mong la hinh tron tren vdt thd (2).
Hinh 5: Bien dgng true tgo hinh tgo mdng mong hinh Iron
Khi V| ^ v^ thi hien tupng in dap co trupt xdy ra, ta co bien dang mdng mong duac hmh thanh tren be mdt vdt th^ (2) Id dang clip hoac bdng chvt nhat tuy thupc su khac biet gitra v^ va v^.
Nhdn xet: Khi van t6c v, ^ v^ di8u kien in dap tir lop hot set (3) len vdt thl (2) se dl dan^
han vi ngoai lire dinh ciia hai be mat con xudt hien luc ma sdt gi&a hk mat (2) vd lap bpt (3).
Tuy nhien, d^ duac bien dang tron tren b6 mat vdt thl (2), bien d^ng ciia lap bpt tren v^t thl (1) se khong tron md co dang elip. Nlu sir khac giija V, yd v^ qud lon, bien dang in dap len bl mat vat the (2) se co dang hinh chu nhdt.
3. THIET LAP BAI TOAN LY THUYET VA THlTC NGHIEM
^ De xdy ra hien tuang in dap tu lap hot set tren bl mat ydt thl (1) len be mat vat thl (2) phdi thod man dieu kien:
Luc dinh gifia vat thl (2) vd lap bpt (3) phai lan hon lire Hen ket cua lop hot (3) vai bl mat Clia vat the (1). Tii ddy, ta co phuang trinh:
F > F ni
dinh (2,3) dinh (1.3) L ' J
Trong do:
• F^^ j2 3)" ^^'^ ^^^ S**^ ^^ n^^* •v^t th^
(2) vd lop bpt (3). Luc dinh nay phu thupc vdt lieu va trang thai be mat ciia vat the (2) (vai cotton hoac kim loai), ma sat giua hai be mat khi CO van toe chuyen ddng tucmg doi cua hai be m$t (2) vd lap bpt (3).
' F^^^^j3| - Luc lien ket (luc dinh) ciia lap bpt tren be mdt vdt the (1).
De gidi phuang trinh [1], ta cdn giai quyet nhung van de sau:
- Qui hoach thuc nghiem de tim dp ket dinh Clia bpt set phu thupc vdo ti le cac loai bpt va nuac tham gia vao hon hgp.
- Xac dinh luc dinh ket ciia hot phu thupc vao trang thai be mat ciia vdt the 1 vd 2 khi dp nhat Clia hot la khdc nhau.
- Xdc dinh dieu kien xdy ra ciia phuang trinh [1].
Do khuon kho bdi bao, nhiing van de tren se dupc trinh bay trong huang phat trien ciia cong trinh nghien ciiu.
4. DE XUAT THIET KE HU'OfNG T 6 I TV*
DONG HOA
Sau day, chiing toi trinh bay giai phdp thiet ke huong toi tu dpng hoa san xudt bdnh trdng gao dang tron.
Hinh 6: Bdn ve lap mdy tu dgng ldm bdnh trdng dgng tron
ISSN 0866 - 7056
TAP CHf CO KHf V I £ T NAM, S6 6 nam 2015 www.cokhivietnara.vn
NGHIEN CUTU-TRAO Ddl
Nguyen lieu gom bpt gao, hot sdn, nuac, phu gia a dang spt duoc cdp vao thiing chiia (2) duac trpn deu bai dpng ca khudy (1). Nguyen lipu se qua he th6ng 6ng ddn, van dilu chmh (3) de vao mdng chiia hot (5). True tao hinh (4) se cuon lay nguyen lieu va in dap len bang tai (9).
Do bdng tdi (9) vai true tao hinh (4) tilp xiic vai nhau thong qua lap bpt, qua trinh m dap se xdy ra. Bien dang cua true tao hinh se dupc thilt k l sau khi gidi phuang trinh (1), bien dang tron ciia bdnh trdng duac tao thanh. Bang tdi (9) se mang bdnh vdo n6i hdp (10) de hdp chin banh. Cum dao gat (8) se boc banh chin ra khoi bang tai (9).
Phen (6) dupc cdp vao bdng tdi (7) d l ldy banh trang ra, dua vdo may say a cong doan tiep theo.
Ta ciing co the thiet ke he thong xich a ben duai mo hinh mdy ndy de say nhieu tang bang dien tro nham d&t dupc dp am thich hap.
huong tu dpng hoa vd sdn xuat dong bp theo day chuyen, con giiip cho nhd quan ly san xudt thudn tien ban trong viec kiem sodt tieu chudn moi truang va tieu chudn an todn ve sinh thuc phdm.
San xudt sach, khong gdy 6 nhiem moi truang va khong che sir tdc dpng ciia moi truang vao san phdm, dat chi tieu xuat khdu, gop phdn ndng cao hieu qud kinh te vd an sinh xd hpi.'I*
Ngdy nhdn bdi: 20/4/2015 Ngdy phdn bien: 25/5/2015
Tai lieu tham Idiao:
[1]. Kari T Ulhch, Steven D. Eppinger, Product design and development. Second Edition, McGraw-Hill, 2000.
[2]. Ma Phuac Hoang; Nghien cuu tgn dung nhiet thdi tie Id bdnh frdng de sdy bdnh trdng.
Tap chi Khoa hpc Cong nghe Dai hpc Da Ndng, s6 01(86), trang 62 (2015).
[3]. Trdn Doan Son, Trdn Truang Son, Doan Van Minh; Nghien cieu tgo vdn lu&i bdnh trdng ri tren co sa to hgp cdc chuyen dgng fhdnh phdn vd mo phong qud trinh dgng hgc bdng hai ddu rot. Tap chl Phat trien Khoa hpc & Cong nghe.
Tap 12, s6 04 (2009).
[4].Trdn Thi Thu Trd; Cong nghe bdo qudn va che bien luang thuc, tap 1 — Bao qudn luang thuc), NXB. Dai hpc Qu6c gia TR H6 Chi Minh (2010).
Hinh 7: Mo hinh 3D mdy tu dgng ldm bdnh trdng dgng tron
5. KET L U ^ N
Viec thilt ke gidi phdp huong tai hj dpng hoa qua trinh tao mdng mong dang tron tu nguyen lipu gao mi, se mo ra mpt huang m6i trong viec san xuat bdnh trang gao dang tron.
Giai phap nay, lam tdng ndng suat, tang hieu qud kinh te thong qua giam luang phu phdm.
Nghien CIJU cong nghe va thiet bi theo
ISSN 0866 - 7056
TAP CHf CO KHf VIET NAM, S6 6 nam 2015 www.co khivietna m.vn
