Industrial Paper Machine Vacuum Suction Couch Roll for Paper Mill

Product Description

Product Description
The vacuum couch roll is the last dehydration components of fourdrinier paper machine, and also is an important dehydration components of twin-wire former paper machine. Paper machine vacuum couch roll is mainly by vacuum pumping, is high-pressure difference dehydration.
The vacuum couch roll of a paper machine is to remove water by application of vacuum. It also serves as the final "wrap" where the wet web exits the forming fabric on its way to the wet-press section. The surface of the couch roll is covered with rows of small holes. Baffles within the interior of the couch roll direct the vacuum toward that segment of the roll where the wet web is on the fabric. Unlike vacuum boxes, an increase in vacuum does not increase the power needed to drive the forming fabric. However, too high an application of vacuum at the couch is likely to produce visible suction-hole "shadows" due to movement of fines within the sheet.
Detailed Photos
Product Parameters

Product Name	Vacuum Couch Roll
Application	Paper machine
Roller Material	Carbon/stainless steel,Aluminum alloy or other specified material
Diameter	460-1600mm
Length	2100-12000mm
Color	Customers' Request
Surface treatment	Trivalent chromium galvanized, chrome, paint, anodized, Teflon spray
Coating	Rubber
Quality Grades:	G1.0, G1.6 and G2.5
Type	Make-to-order

The adhesive layer have good elasticity, compression resistance, flex resistance and thermal conductivity.
The maximum tolerance of the hardness should be within the allowable range, otherwise the unevenness of the pulp will be uneven and the quality of the paper will be affected.
Generally, the Shore hardness is 40°~100°, and the tolerance is ±2°~±4°.Stainless steel rolls body have the following advantages over tin bronze rolls:1.Has higher rigidity and mechanical strength. Its tensile yield strength and impact toughness are more than double that of copper, which is conducive to improving the dehydration rate.
2.Has higher hardness and abrasion resistance, good impact toughness. It does not deform during long-term high alternating load operation, which is incomparable with copper structure.
3.It has high hardness and abrasion resistance, has extremely high corrosion fatigue strength and ability to resist corrosion cracking and corrosion wear, which is 2-3 times that of copper alloys, and the service life is also increased by more than 2-3 times.
Application and Function
ApplicationVacuum couch roll, one of the papermaking machines, is located at the end of the wet end.
Function
Have higher rigidity and mechanical strength. Its tensile yield strength and impact toughness are more than twice that of copper, which is beneficial to increase the dehydration rate.
It has high hardness and abrasion resistance, and good impact toughness. It does not deform during long-term operation under high alternating loads, which is incomparable with copper structures.
It has high hardness and abrasion resistance, and has extremely high corrosion fatigue strength and resistance to corrosion cracking and corrosion wear. It is 2-3 times that of copper alloys, and its service life is also increased by more than 2-3 times.
Production Process
Different type rolls Company Profile
LEIZHAN is a China Based engineering company and machinery supplier committed to offer complate solution and provide high-cost-performance equipments related to stock preparation and paper-making industry.
For years,we have insisted on taking customer's value as our center and having strict quality-control and innovation in the whole process. With advantage technology and excellent equipment,we provide one-stop service from consultation,process design and optimization,manufacture,installation,commissing and personnel training and so on.
At the same time,we can supply all kinds of stock preparation and paper making equipment and accessories.Besides,we can custom design according to customers' requirements. Our products have reliable quality and superior performance and have been exported to Poland,Greece,Turkey,Iran,India,Packistan, Bangladesh, Thailand, Indonesia, Philippines, Malaysia, Vietnam, Mexico, Guatemala, Costa Rica, Columbia, Egypt etc.