A metal part that wears out every quarter, and a line stoppage because of a broken scraper, is a typical situation for production sites with abrasives and impact load. Cast polyurethane solves it, because in the same joints it serves many times longer than metal and rubber. The TIMOL factory in Dnipro produces polyurethane parts using open casting technology to the customer’s drawing. Let us break down how this production is arranged, which industries it works for and why polyurethane displaces other materials.
How Polyurethane Parts Production Is Arranged
Polyurethane parts production in Ukraine at the TIMOL factory is built around open casting technology. The essence is that liquid polyurethane is poured into a mold without high pressure, after which it polymerizes and acquires the specified properties. Unlike pressure casting, this method does not require expensive metal molds for each product, so production of single and small-series parts becomes economically justified.
The process starts with a drawing or a sample. The engineer determines the hardness and composition to match the working conditions of the joint, after which the mold is prepared and the part is cast. For products on a metal base, for example rollers or lining shafts, the metal surface is cleaned, degreased and primed with an adhesive, and only then poured with polyurethane. Because of this, the bond of the polymer to the metal comes out so strong that the part wears through before the joint tears.
Open Casting Technology: Why It Is Flexible
Open casting gives the main advantage, freedom of geometry and dimensions. One method produces both large lining sheets for hoppers and small bushings or seals, without changing expensive tooling. This is critical for industry, where often not a series of thousands is needed, but a specific part for a joint that is no longer on sale.
Hardness is regulated across a wide range, from 50 Shore A to 70 Shore D, that is, from elastic products that damp impact to rigid structural parts that hold abrasive and pressure. The same base material for different tasks gives different characteristics, and it is precisely the engineer who selects the required combination. More detail about the material’s properties is collected in the reference information section.
Comparison Table: Polyurethane Versus Metal and Rubber
So that the material choice is well grounded, here are the characteristics from standard references alongside the verified data of TIMOL polyurethane. The table shows where polyurethane beats steel and rubber, and where they keep the advantage.
| Characteristic | TIMOL Polyurethane | Steel St3 | SBR Rubber |
|---|---|---|---|
| Abrasion DIN 53516, mm³ | 38-39 | n/a | 100-200 |
| Working temperature, °C | -60…+100 | -40…+500 | -40…+80 |
| Density, g/cm³ | 1.05-1.25 | 7.7-7.9 | 0.94-1.1 |
| Tensile strength, MPa | 39-87 | 370-700 | 8-20 |
| Corrosion resistance | does not corrode | low | does not corrode |
| Vibration and impact damping | good | poor | good |
Steel is irreplaceable where ultimate strength or a temperature above +100 °C is required, but it is heavy, corrodes and transmits impacts to the structure. Rubber is cheaper, but wears 2 to 5 times faster. Polyurethane gives a balance of wear resistance, low weight and impact damping, so in many joints it replaces both materials.
TIMOL engineer’s tip: when you order production for a worn joint, send not only the old part, but also a measurement of the seat. A worn sample gives understated dimensions, and copying from it will repeat the defect. From the drawing or from the seat we will restore the correct geometry and select the hardness to match your load, this is the difference between a part that just fits and a part that serves its full life.
Which Industries the Factory Works For
Cast polyurethane is used in 12 industries, and the production range reflects this. For agriculture, seeding and transport parts are cast; for mining, lining of hoppers, chutes and pipelines; for metallurgy, rollers and scrapers; for utilities, wheels and seals. The food and pharmaceutical sectors receive parts that contact the product, with the material composition agreed in advance.
Such breadth is explained by the versatility of polyurethane itself: one material closes the tasks of wear, impact and chemical resistance that used to be solved with different parts with different weak spots. It is convenient for an enterprise to order whole groups of products from a single manufacturer with predictable characteristics. An overview of typical products is collected in the catalog of polyurethane products.
Why Polyurethane Replaces Metal and Plastic
The main reason for switching to polyurethane is the combination of durability and low weight. A part of the same volume weighs roughly six to seven times less than a steel one, does not corrode and damps the vibration that metal transmits to the frame. At the same time, in wear resistance in abrasive joints, polyurethane beats both rubber and many plastics, while retaining the elasticity that hard plastics lack.
The practical effect is simple: less frequent replacement, less line downtime, lower maintenance costs. Where a steel scraper has to be changed every quarter, a polyurethane one runs considerably longer, and the lighter construction reduces the load on drives and supports. This is exactly why industrial enterprises are steadily converting wear joints to cast polyurethane.
Summary and Ordering Production
Polyurethane parts production in Ukraine using open casting technology gives enterprises a flexible solution: a part for a specific drawing, the required hardness from 50 Shore A to 70 Shore D and wear resistance that outlasts metal and rubber. The TIMOL factory in Dnipro covers the tasks of 12 industries, from single non-standard parts to serial lining and conveyor products.
To order production from a drawing or sample or to get a consultation about the material for your joint, get in touch through the factory contacts. An engineer will select the hardness, composition and geometry to match the working conditions of your part and calculate the optimal batch.
