Polyurethane composite rubber roll and manufacture method thereof

Abstract

The invention discloses a polyurethane rubber roll and a manufacture method thereof, and belongs to the technical field of rubber roll. The polyurethane composite rubber roll comprises bonding layers and a polyurethane rubber layer. A five-layer structure comprises a core layer, a first bonding layer, a glass fiber reinforced plastic layer, a second bonding layer and a polyurethane rubber layer from inside to outside. The core layer and the glass fiber reinforced plastic layer are connected through a bonding layer; the glass fiber reinforced plastic layer and the polyurethane rubber layer are connected by the second bonding layer. A manufacture method comprises steps of: (1) cladding the first interface bonding layer; (2) cladding the glass fiber reinforced plastic layer; (3) cladding the second interface bonding layer; (4) cladding the polyurethane rubber layer. The polyurethane composite rubber roll with a five-layer structure of the invention can eliminate influences on the interface bonding layers caused by surface dark fringes on a cast iron core, sand holes and graphite migration, avoid reduction of core external diameter caused by reprocessing and preclude integral disengaging of a glue line. The invention enhances usefulness of the polyurethane rubber roll and prolongs usage life of the core.

Description

technical field [0001] The invention relates to a polyurethane rubber roller and a manufacturing method thereof, in particular to a polyurethane composite rubber roller with a five-layer structure and a manufacturing method thereof. Background technique [0002] Polyurethane rubber (PUR) is a rubber with excellent tensile strength, elasticity and elongation at break. It is often used to prepare special rubber rollers and wear-resistant products used in various papermaking and smelting industries. [0003] Polyurethane rubber rollers widely used in papermaking and metallurgical industries are mainly structured from the inside to the outside, with a three-layer composite structure of roller core layer / interface adhesive layer / polyurethane rubber layer, in which the roller core is cast iron or 45 # steel. [0004] However, during the use of this type of rubber roller (especially the rubber roller of the cast iron roller core layer), there are the following obvious defects, wh...

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Problems solved by technology

[0005] 1. The precipitation of graphite in cast iron leads to the deterioration of the performance of the interface bonding layer

[0006] Cast iron has relatively serious graphite precipitation during processing and use. The precipitation of graphite with an isolation effect is likely to cause debonding at the interface between cast iron and polyurethane, especially at high speeds, high loads and high operating temperatures. The problem is more prominent, which also leads to the inability of this type of rubber roller to be used in a more harsh processing environment

[0007] 2. The increase in the thickness of the polyurethane rubber layer caused by the repair of the rubber roller will easily lead to the phenomenon of "exploding rubber"

With the increase of the number of repairs, the continuous increase of the thickness of the adhesive layer will cause a series of problems: first, the increase of the pouring cost, and more seriously, due to the large "hysteresis loss" of the polyurethane when it is subjected to periodic loads, repeated deformation The post-generated heat is high and the heat transfer coefficient is low. Under high-speed operation, the heat generated inside the over-thick rubber layer cannot be quickly eliminated, which will easily lead to the decomposition, melting or even bursting of the rubber layer, which seriously affects the service life of the rubber roller.

[0009] 3. The number of roller core repairs is small, which brings huge waste of resources

These documents do not propose a solution for the bursting of the polyurethane rubber layer.

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