Skip to main content

INJECTION MOLDING DEFECT 2~short shot

 Doston short moulding ya fir short shot kya hota hai Iske bare Mein  Kuchh baat karte hain.


 Jab mold mein plastic melt material ko barrel se tab vah mold ki cavity ke hisab se material ko set Kiya jata hai ki jitne material ko inject Karana hota hai vah part ke shot weight ke hisab se hi inject kara Dete Hain .

doston  barrel Mein Jitna material Hota Hai jo ki Jyada Se Jyada bade se bade mold Mein inject karaya Ja sakta hai usko shot capacity bolte Hain aur Jitna material Ham inject Karate Hain usko Ham short size bolate Hain per Jo material Ka weight Hota Hai Jitna Ham inject Karate Hain mold mein kisi cavity ko bharne ke liye Jo impression hota hai Core aur cavity ke bich mein jo ki batata hai ki kitna weight hai impression ka usse yah decide hota hai aur cavity ke bich Jo material Hai vah Kitne shot size ka Hai Kitne gram Ka Hai Isko gram Mein major Karte Hain vaise to short size Jo Hota Hai Chhote mold Mein kam rahata hai aur Bade mold mein jyada rahata hai depend karta hai ki part Kitna deep Hai Kitna lamba hai aur Kitna breadth mein hai.


 To doston,

 short shot kya hota hai short shot Ek defect hota hai Jaise man Lijiye ki Hamen 20 gram ka product banana hai To Ham 20 gram material hi inject karaenge mold Mein per use 20 gram ko Ham machine aur mold ke hisab se mm Mein convert Karke inject karaenge aur jab material inject kara Dete Hain To mold mein part pura Bhar Ke Nahin Aata Hai material ka uski Kuchh vajah hoti hai yahi defect shot molding  kahlata Ha yah isliye Aata Hai Doston Kyunki bahut bar Jo injection pressure Ham set karte hain vah kam rahata hai ya FIR injection speed kam set ki Gai hoti hai Teesra Karan Hai holding speed kam hone ke Karan bhi short moulding aata hai injection pressure ya holding pressure kam hota hai tab bhi aata hai agar machine ka sahi se nahin liya Gaya Hai tab bhi yah defect Aata Hai Iske alava Agar transfer position sahi se set na ki Gai ho to bhi short shot Aata Hai agar temperature ki value Sahi Nahin set ki gai hai to bhi short  aaega agar back pressure bahut kam de rakha hai to short shot aaega Iske bad Agar RPM bahut hi jyada kam hai tab bhi short shot aaega starting Mein RPM ko Badha Ke Rakhna chahie FIR Kuchh der bad aap kam kar sakte hain cooling time ke hisab se Taki refilling Waqt per ho jaaye short shot aane ke aur bhi reason hai jismein ki injection position Kafi kam hone se bhi short shot Aata Hai Kai bar machine ka jo Nojel Hai vah Uska hole jo hai vah Kafi Jyada Chhota hone se short shot aata hai ya FIR machine ki screws se machine ke Nobel ka jo contact Hai alignment hai vah proper nahin hai jisse ki short shot Aata Hai yani ki center out Ho Jata Hai To fir material leakage karta hai ya FIR Kai bar machine ka jo nozal ka tip Hai vah Chhota pad Jata Hai mold ke Nahin Pata Hai tab bhi Aata Hai Agar screw ka ring plunger Fail Ho Gaya Hai To material Wapas machine Mein Chala Jata Hai jisse ki part Bhar Nahin pata hai aur short shot aata hai to Is Tarah Se Jo problem hai molding ki vah inhin chijon ki vajah se Aati Hai



 Is problem ko solve karne ke liye Hamen injection speed suitable Deni chahie injection pressure holding pressure holding speed screw RPM temperature aur back pressure ki Sahi value fit Karni chahie part ke hisab se Taki short molding Na Aaye Is Tarah Se Ham is troubleshoot kar sakte hain doston to kaisa laga aapko yah aaj ka blog ummid hai Achcha Laga Hoga Hamare blog se Jude rahiye aur Hamen Baki social media per bhi follow kariye doston agale video agale block Mein Ham aapke liye agale defect ke bare mein Hindi mein baat karenge Taki aapko acche se chijen aur concept Samajh Mein Aaye                         


                 thank u

APKA APNA~

EZYPLAST

Comments

Popular posts from this blog

What is suck back in injection molding

 Good morning dosto Suck back , Naam se hi lag rha hai ki koi cheez suck ho rhi hai yani kheechi ja rhi hai . Suck back ka matlab hua peeche ki taraf kheechna  .  Actually jab plastic melt material mold me inject ho jata hai aur injection ke baad holding  complete ho jati hai tab part cooling zone me jata hai aur isi waqt refilling bhi sath sath hoti rhti hai refilling poori hone k baad screw straight direction me back hota hai utne mm jitna set kiya jata hai. Alag alag material k liye alag alag value me set krte hai suck back  Suck back dene se drooling ki problem ko solve kiya jata hai aur sath hi sath   silver bhi troubleshoot hota hai .suck back dene se material me threading generate nhi hoti hai nozzle se  

Types of plastic

Plastic 2 prakar ke hote hai 1 thermoplastic 2 thermosetting plastic Wo plastic jo ek baar heat dene k baad   soft ho jate hai aur easily doosrey article me convert ho jate hai .isme na unki physical property change hoti hai n chemical property change hoti bus sirf physical look change ho jata hai Jabki thermosetting plastic me  agar ek baar kisi article ko heat kiya to fir se wo dobara nhi change nhi hoga aur material degrade ho jaega aur dirty si smell aane lagti hai for example aap cooker k utensil hi lelo .isliye thermoplastics achche hote hai kyuki wo recyclable hote hai . Unse koi bahut jyada environment ka khatra bhi nhi hai . #injection molding #plastic #indiaplast #ezyplast #whatisplastic #typesofplastic #plastasia #polymer

What is l/d ratio

L/d ratio👉 Yah screw ki flight length aur outside diameter Ka anupat Hota Hai jyadatar yah anupat 20:1 hota hai aur ya 18:1 se 24 * 1 Tak hota hai dharmon set material Mein yah anupat 12:1 se 16 is Tu Van tak rahata hai Jyada Se Jyada share hit generate Hoti Hai plastic Mein Bina Jale Hue Jitna Jyada mixing hoti hai utna hi h*** genus melt hota hai Jitna Jyada residence time hota hai plastic ka barrel mein aur LCM Jyada hoga to kam cycle time mein Bade shots nikal Lete Hain. To yah To Kuchh definition Thi doston ab main aapko Aasan bhasha mein samjhata hun ki l y Di ratio Hota kya hai dekhiae jo screw ki lambai hoti hai usko Ham bolate Hain flight length theek Hai Doston Kyunki yah flight Jahan se start hoti hai aur jahan tak flight ka end hota hai rinklanjar wale part Ko Chhod Karke is group mein vah lambai kahlati hai flight length aur jo nominal diameter hota hai is group ka usko Ham outside Tak napte Hain usko Ham bolate Hain out side diameter ine donon ka hi jo ratio Hota Hai vah...