As we all know, polyurethane casters are molded using polyurethane raw material pouring. Pouring polyurethane casters is a process that involves many links, from the preliminary preparation to the final curing and maintenance, each step requires precise operation and strict control. So how many steps do polyurethane rubber casters need to go through to be molded?
Pre-preparation
Before starting to pour polyurethane casters, adequate preparation is required. First of all, suitable raw materials such as polyurethane resin, catalyst, filler and solvent should be selected. These materials should have good mechanical strength, wear and corrosion resistance. At the same time, relevant tools and equipment should be prepared, such as weighers, mixers, molds and so on. The selection of molds should be based on the size and shape of the casters, while ensuring the firmness and stability of the molds.
Mixing
Mix the selected polyurethane resin, catalyst, filler and solvent according to a certain proportion. During the mixing process, pay attention to the control of temperature and viscosity to ensure that the fluidity of the raw materials is good. After mixing, pour the mixed polyurethane material into the pre-prepared mold.
Pouring
During the pouring process, the pouring speed and pressure should be controlled to avoid problems such as air bubbles and lack of material. At the same time, pay attention to observe the pouring situation and adjust the pouring speed and pressure in time. Generally speaking, the casting casters should be slightly larger than the actual size needed for trimming after curing.
Curing and Maintenance
Polyurethane materials need to be cured and maintained after casting. The curing time is generally 24 hours, during which time the surface of the slurry should be kept moist, and can be humidified or protected from the sun, etc., according to the construction conditions. During the maintenance period, care should be taken to avoid the influence of external factors on the casters, such as temperature and humidity.
Performance Characteristics
Abrasion resistance: cast polyurethane casters have extremely high abrasion resistance, can be used for a long time in poor working environment, significantly extend the service life.
A good polyurethane caster should have the following characteristics:
Oil resistance: the material has good corrosion resistance to many kinds of oils and is suitable for various oil-contaminated environments.
Water resistance: cast polyurethane casters are not easy to deform in water and have good water resistance.
Low temperature resistance: the material can still maintain good elasticity under low temperature conditions, suitable for cold areas.
Environmental protection: the polyurethane material is non-toxic and odorless, which meets the requirements of environmental protection and is conducive to sustainable development.
Post time: Oct-18-2024