Screws Fender
 |
US $.99
A Study on Screen Changer of Extruder
There are impurities in most of the plastic materials, but they can be cleaned effectively by a screen changer, which is installed on the back of an extruder, and it is a kind of honey net, sharing the same diameter of the barrel for extrusion machine.
Generally speaking?a screen changer is composed of different nets. The net inside can filter the smallest solid particles from the stream of melt; while the outside coarse mesh can prevent larger particles from entering the dense inner net.
In order to resist the force due to melt flow, there is a round steel plate, which is called fender, imbedded in the groove of the end of an extruder’s barrel.
Please remove the down stream equipment to change the blocked mesh with a new one, and reinstall the new mesh onto the production line.
Screen Changer
It is unnecessary to stop working with the way above; at the same time it can dispense much labor. As per the design, there are two main types: interchangeable type and continuous type.
An interchangeable screen changer owns two identical mesh groups, one of which is installed over the path of melt flow. Another mesh is used when the first group is ineffective; while the used group is changed outside. These two groups of mesh are put on the same steel plate, revolving round the same shaft, or sliding along the guide. The former works based on a lever by manual control; while the latter moves its mesh group by hydraulic pressure from one side to another. A valve is needed in another method to change mesh, so that the melt can flow into a new mesh group from the old one.
Continuous screen changer: it removes the new mesh into melt flow, from which the old one is moved away. The speed of this process can be adjusted according to the amount of impurities automatically. A continuous screen changer enables to get rid of the pressure and temperature change of melt due to the discontinuous operation.
A continuous screen changer is designed based on swivelslide.There are numerous mesh groups lining along a turntable, driven by a wheel machine. When the turntable is moved, the used mesh is removed from melt flow.
Some extruders use oblong meshes, which are usually 120 feet long. In the place where a oblong mesh enters in or comes out, a few pieces of plastics become cool and hard, so that the loss of polymer can be avoided. The filter net is pulled out by hydraulic pressure outside.
About the Author
by Xiangsu
|
|
Fender Neck Mounting Screws $9.99 Fender Neck Mounting Screws |
|
|
Fender Gold Pickguard Screws $16.99 Fender Gold Pickguard Screws |
|
|
Fender Pickguard Screws $4.49 Fender Pickguard Screws |
|
|
Fender Set Screws for Fender Knobs (12) $5.99 Fender Set Screws for Fender Knobs (12) |
|
|
Fender Set Screws For Fender Knobs (12) $5.99 Fender Set Screws for Fender Knobs (12) |
|
|
Fender Pickup/Switch Screws (12) $3.99 Fender Pickup/Switch Screws (12) |
|
|
Fender Neck Mounting Screws (4) $4.49 Fender Neck Mounting Screws (4) |
|
|
DiMarzio Fender Pickguard Screws Black Set of 24 $8.5 DiMarzio Fender Pickguard Screws Black Set of 24 |
|
|
DiMarzio Fender Pickguard Screws Chrome Set of 24 $6 DiMarzio Fender Pickguard Screws Chrome Set of 24 |
|
|
Fender American Std Bridge Height Screws (12) $4.99 Fender American Std Bridge Height Screws (12) |
|
|
Fender Original Strat Bridge Height Screws (12) $4.99 Fender Original Strat Bridge Height Screws (12) |
|
|
Fender Thumb Screws for Piggyback Amplifier - Set of 2 $15.99 Fender Thumb Screws for Piggyback Amplifier - Set of 2 |
|
|
DiMarzio Fender Pickguard Screws Gold Set of 24 $10.5 DiMarzio Fender Pickguard Screws Gold Set of 24 |
|
|
Fender Gold Pickup/Switch Screws (12) $12.99 Fender Gold Pickup/Switch Screws (12) |
|
|
Dimarzio Fender Pickguard Screws Black Set Of 24 $8.5 DiMarzio Fender Pickguard Screws Black Set of 24 |
|
|
Fender Thumb Screws For Piggyback Amplifier - Set Of 2 $15.99 Fender Thumb Screws for Piggyback Amplifier - Set of 2 |
|
|
Dimarzio Fender Pickguard Screws Gold Set Of 24 $10.5 DiMarzio Fender Pickguard Screws Gold Set of 24 |
|
|
Dimarzio Fender Pickguard Screws Chrome Set Of 24 $6 DiMarzio Fender Pickguard Screws Chrome Set of 24 |
