Wear protection and easy hopper cleaning

Cleaning concrete mixer drums is absolutely necessary to avoid increasing a vehicle‘s weight due to hardened residual concrete. It ensures that a ready-mix truck‘s maximum loading capacity is available and that the vehicle can be operated cost-effectively.
Unwanted residual concrete build-up is removed by a well-known, old-fashioned  procedure – “cleaning by hammer”. Once a year, as a general rule, an employee gets into the mixer drum for a couple of hours, or up to five days, and removes the hardened residual concrete with a hammer and chisel. This type of work is almost unimaginable in terms of occupational safety – “working in an enclosed space” – and in view of the stress placed on the employee as regards dust and noise emissions. Cutting-edge, robot-controlled concepts for removing residual concrete from a mixer drum are now being employed for this work. A lance is introduced into the mixer drum and the cleaning process carried through in a short time using a high-pressure water jet. When utilised regularly, this procedure provides preventative protection against new caking. The cleaning lance has to be introduced horizontally through the infeed funnel. This is an almost impossible task, since any opening in the funnel would render it non-functional.

The patented two layer hose with cut-resistant outer layer and wear-resistant inner layer!

So-called concrete hoses are used in ready-mix facilities to transfer material from the concrete mixer to the mobile mixer. Most concrete hoses are made of rubber or, occasionally, PUR and have a seam. The constant high stresses from the rough site conditions mean that the material must be elastic and be resistant to wear, cuts, oils and exposure to UV rays.

When using these products, it is obvious that there is a need for improvement in the following areas:

• The service of the adhesive joint is insufficient, particularly under strong UV
• There are many signs of wear from sharp edges in the area of the mobile mixer´s metal filling hopper. When driving the mixer up to the transfer point, these sharp edges can cut ito the softmaterials.
• Rubber materials are usually sufficiently elastic but sometimes kink if the mobile mixer is not in the centre of the transfer point. If the hose is kinked, it may burst if the seams are not strong enough.
• Conventional concrete hoses do not have a simple solution for preventive maintenance.

Keeping an eye on wear

Polyurethane hopper linings for extremely long service lives

Hopper linings made from Hawiflex® polyurethane are supplied in centric design as a ready part. The anti-adhesive effect ensures significantly shorter cleaning times compared to steel hoppers.

The cantilever effect enables extremely long service lives in comparison to steel hoppers or lining with rubber.

But that’s not all! If the concrete is impacted from one or two sides, you can promptly turn the hopper 90° or 120° and thus double or treble the service life. This is easily possible, as the lining is only hung or screwed in loosely.

Self-protecting through catchment compartment

Impact plates made from Hawiflex® polyurethane can be used at handover and transfer points of conveyor belts. They utilise the catchment compartment principle for self­-protecting wear reduction.

Avoid material fractures and abrasion residues like those with rubber

Gripper strips are located at the gripping end of gripper arms and are used, among other things, in the sand-lime brick and concrete industry for handling palletized and unpalletized building material packages. Polyurethane gripper strips offer in comparison to the usual grippers enormous advantages for long-term use in terms of abrasion and usability in weather-unstable outdoor applications.

This is due to the fact that our products are free of extracting elements, UV-resistant and highly abrasion-resistant. The bottom line is that the physical properties remain stable over the entire period of use without embrittlement process, which can ultimately lead to material breakouts. Due to the high abrasion resistance there are also no unwanted black stripes on your stone packages. Our range of gripper strips also includes profiles for truck-mounted cranes or forklift grabs. Get in touch with us!

Minimises wear, quick and easy to install

Polyurethane sheets are ideal for wear protection linings. The use of the step plate is recommended at loading and transfer points in conveyor technology in order to further reduce wear. The effect of the material recesses in the step plates is to give its “teeth” enough space for flexibility in order to buffer high impact forces.

Due to this trampoline effect the step plate wears out less quickly than a compact surface. The step plate is available in two thicknesses and has stud bolts cast in on the back. If required a version without bolts is also available for the option to adapt the step plate to an existing drill pattern. The perforated metal sheet reinforcement also offers a special rigidity. The step plate can ideally upgrade a plate lining in certain areas or it can also act on its own. Our products can be freely combined and can be cut to size on site with suitable tools.

Quick and easy installation

Sometimes it is advantageous to break the whole thing down into smaller manageable pieces. According to this principle we have developed our wear-resistant Hawiflex® tiles which can be arranged like a backsplash. In this way large areas can be lined ergonomically piece by piece. Large area weights of linings are dispersed to pieces with a unit weight of approx. 5kg.
This makes working in inaccessible and risky areas of the plant easier and safer for your employees.

In pitfalls or manholes the given format allows that the tiles can be laid straight from top to bottom. Alternatively you can also start anywhere in order to cut the finishing pieces to size with a suitable tool. This sometimes makes sense for geometries that are not right-angled. Ask us if you need more detailed information on cutting Hawiflex®. We will find a processing option that can be easily carried out by you on sight.

For increased transport safety

As a Hawiflex® polyurethane finished part, this protection is cost effective and flexible. Assembly and disassembly are really easy.

Highly durable

For use in mining and tunnel driving technology, we select appropriate application-specific materials to manufacture your individual concrete spray nozzle according to drawing or template for exact spraying.