FAQs
- How to Determine Parting Line of mold products?
- Parting Line
- Cavity
- Two shot plastic injection molding
- Hot Runner
- Mold problems
- Mold Structure
- do you know about" Injection molding"
- Mold Layout Design
- Mold Layout/Design
- Mold Wiki
- Quality
- Die casting
- Delivery Terms
- 3 D Printing
- Manufacture plastic parts
- Service
- Yunpeng Certificate
- 3D Drawing Format
- Yunpeng mould advantage 2
- Yunpeng advantage
- Payment terms
- Delivery time
- surface treatment
- Plastic Material
- Good Factory
- Mould steel
- Mold tooling
- Factory
Certificates
why causes mold with hot runner leakage?
Is the leakage on the outside of the plastic injection mold or internally. Possible causes for external leaks are worn probe seals or improper cleaning when being maintenance. Internal leakage may be caused by shooting through when manifold in not fully up to temp or wear on the crush rings reducing the preload on the system.
There are several Hot Runner systems on the market and many causes for leakage. It would be helpful if you could be more specific with the type of system and location of leak. Also a great source for trouble shooting would be to contact the hot runner manufacturer since they are most familiar with their system(s) and the problems they may have.
In general:
I have seen hot runner internally flooded with plastic because injection molding parameters and settings are wrong. For example: mold cavity fill time too long, which causes the material to freeze up close to the injection points; then hold pressure applied onto frozen injection points—> the molten plastic has to go somewhere, maybe into your hot runner. A good symptom for this problem is if you have material leakage at the mainmould entry valve gate and plastic creeping back up your screw cylinder - because the molten material cannot get into the frozen cavity.
One specific situation:
There are several Hot Runner systems on the market and many causes for leakage. It would be helpful if you could be more specific with the type of system and location of leak. Also a great source for trouble shooting would be to contact the hot runner manufacturer since they are most familiar with their system(s) and the problems they may have.
In general:
I have seen hot runner internally flooded with plastic because injection molding parameters and settings are wrong. For example: mold cavity fill time too long, which causes the material to freeze up close to the injection points; then hold pressure applied onto frozen injection points—> the molten plastic has to go somewhere, maybe into your hot runner. A good symptom for this problem is if you have material leakage at the mainmould entry valve gate and plastic creeping back up your screw cylinder - because the molten material cannot get into the frozen cavity.
One specific situation:
if your hot runner has transfer gates to inserts, and these inserts are not currently in use. The transfer gates might need time to warm up to the same temperature, so they stay shut. Or check if these unused transfer gates are really well shut.
- if you need help, pls contact me, I am Tea, my email is injectionmold2006@163.com
- whatsapp+8615958816137 skype:injectionmold2006@163.com
NAVIGATION
PRODUCT
- 3D printing & Prototype
- Home Appliances Plastic Mould/Molding
- Overmolding Mould/Molding
- Electronic Plastic Mould/Molding
- Medical Plastic Mould/Molding
- Industrial Plastic Mould/Molding
- Commodity Plastic Mould/Molding
- Auto plastic mould/molding
- Packaging Plastic Mould/Molding
- Stamping Mould & Die Casting
- Silicone Mould/Molding
- Blowing Mould/Molding
CONTACT US
- Name:
- Louis
- Tel:
- 86-18667882836
- 86-18967854492
- 86-0574-62001718
- WhatsApp:
- https://wa.me/8618667882836
- Skype:
- Skype:lzylzy8760
- Address:
- number 36 .yujinggen road.yuyao city .zhejiang province
subscription
QR code
