Most melt transfer or pumping problems in plastic pelletizers are caused by inappropriate metering section designs. Below Shuliy Machinery introduces the common problems and possible solutions of plastic granulators in use.

The first most common problem in the melt conveying of plastic granulators is that the grooves are too deep; the second most common problem is the insufficient length of the metering section. If the groove is too deep, the metering section of the screw can be cooled to reduce the effective depth.

Conversely, if the threaded groove is too shallow, the metering section of the screw can be heated to increase the effective depth of the threaded groove and increase the melt transfer capacity. However, if the depth of the metering section is incorrect, it is best to change the screw design with an appropriate metering section size.

In some cases, simply changing the design of the screw does not effectively improve melt transfer capacity. For example, there is a two-stage extruder screw that must be operated at high outlet pressures. If the second-order length of the screw is insufficient, it may not be possible to use the screw to generate the required high pressure.

Such conditions will cause exhaust gas flow, that is, the molten polymer flows out of the exhaust holes. One possible solution to this problem is to place a gear pump between the extruder and the die. In this method, the gear pump can generate the required head pressure, and only the screw can generate enough pressure to feed the gear pump.

Other possible solutions for exhaust flow are:

1. Reduce pressure.

2. Increase the length of the extruder.

3. Use the internal heating of the screw in the second stage of the screw.

4. Reduce the barrel temperature in the second stage.

E-mail me when people leave their comments –

You need to be a member of The Brooklynne Networks to add comments!

Join The Brooklynne Networks

Brooklynne Brands & Services


TicketENVY- Find & Buy Sold out Concert, Sports and Theater Tickets Worldwide

SportsBrook- Fully Licensed Online Urban Sports Betting and Gaming Platform (Coming Soon)

KaratCity- Helping to provide regular people save and spend GOLD

VerticalRents- Helping Landlords mange and engage their Tenants Easier

MyTeleMedics- Get your Personal and Family Remote Healthcare Services NOW

FunderPass- Crowdfunding Platform for Urban Communty Projects Cause Activism and Upstanding Individual Needs

SeksCity Toys- Adult Pleasure Aids and Supplies (Must Be 18+)


Brooklynne Info Weekly- News nd Events of featured Brooklyn Entrepreneurs and Community Related Issues

Brooklynne Style Daily- Brooklyn & NYC Based Style and Fashion News

Brooklynne Shop- Exclusive Graphic Designs from Featured Artists and Partners

Brooklynne TV- Watch Underground Indie Videos Podcasts & Live Events

Brooklynne Hookups-  Find Urban Dates and HookUps

Local Business Services

The Brooklynne Agency -Full Service Digital Marketing and Development Marketplace

Brooklynne Social - Free Social Media Marketing Mgmt Platform for Brands

The Brooklynne Agency - Office

Phetch.Co Ordering Mgmt

Xpurts by Phetch - Have REMOTE private conferences and meetings with Professional Experts

Go Phetch - Multi Cuisine Order and Delivery Mgmt Facilites and Marketplace for local Ethnic Food Providers in Brooklyn (Coming to NYC HOU DMV  & ATL)

Phetch IT- Order for Delivery Food Groceries Alcohol & Laundry from your favorite Independent merchants in your Area(Coming to NYC HOU DMV and ATL)

Phetch Charg- Start an Electric Vehicle Charging Station at yur Urban locations Tdday