Collecting, buying, selling, storing and processing waste in materials as diverse as aluminum, copper, bronze, lead and iron. All this work, typical of scrap yards, requires moving and handling large quantities of heavy items in an agile and safe way, both for the environment and the workers.
These two requirements, agility and safety, that condition the tools and machines that must work in a scrap yard. Finding options that satisfy both means finding a mechanism that guarantees productivity and offers versatility, such as Stemm's grapples.
What Stemm orange peel grabs do in a scrap treatment plant
The scrap orange peel grabs its name from the special claws that shape it and pick up the materials. It is a specialized crane that facilitates the scrap treatment plant’s work thanks to four differential benefits:
- It loads and unloads materials of different densities and as heavy as beams or steel blocks quickly since, in the same transfer, it can handle large quantities.
- It facilitates the handling of scrap for stacking due to its movements and control, maximizing the use of storage space.
- It provides efficiency in the process because it shortens handling times and increases profitability.
- It increases safety and can reduce the risk of accidents since it minimizes manual handling of heavy materials.
In other words, using grabs in a scrap orange peel grab improves efficiency, safety, and profitability. For this, it is crucial to choose the most suitable model, taking into account variables such as the materials to be collected, the space for its installation and the collection capacity that will be required.
The most suitable scrap grab for each case
Among the options that Stemm designs and manufactures, several models of grabs can meet the objectives of a scrap yard according to the criteria of materials, density and location in which they operate.
Orange peel grabs
Stemm's electrohydraulic grabs allow precise handling of light, medium and structural scrap. They work at any inclination and with a low noise level. In addition to safety stops, they have unique anti-wear manganese steel penetration teeth and claws with maximum penetration, dragging and compacting force. Its motor pump guarantees fast cycles.
Among Stemm's electro-hydraulic grabs, four models may be suitable for different densities:
- PH 0.9, the density of 0.9 t/m³ (± 15%), for light scrap.
- PHR 2.5, the density of 2.5 t/m³ (± 15%), for medium scrap and fragmented scrap
- PH 3, the density of 3 t/m³ (± 15%), for medium and fragmented scrap metal
- PH 3,5, the density of 3,5 t/m³ (± 15%), for structural scrap
Mechanical grabs
For installations where the grapple movement is cable-guided, such as shipyards or harbors, Stemm cable grabs are the answer. Their claw and half-shell profile adapts to materials with maximum penetration force, and their robust structure is made of high yield strength steel.
- PMC 0.9, density 0.9 t/m³ (± 15%), for light scrap.
- PMC 2.5, density 0.9 t/m³ (± 15%), for medium and fragmented scrap metal
- PMC 3,5, density of 0,9 t/m³ (± 15%), for structural scrap
Hydraulic grabs PHNA 3.5
Stemm hydraulic grabs work with all types of scrap. They have unique Hardox 500 teeth, anti-wear manganese steel penetration, and a steel-reinforced structure with a high elastic limit. Their claw joints do not require greasing and are maintenance-free.
- PHNA 3.5, density 3.5 t/m³ (± 15%), for all types of scrap.
The correct choice of grapples is fundamental to achieving optimal and adequate use of the automation processes, as is already the case at the Alt Empordà Waste Treatment Center and the Sogama materials recovery plant, both examples of working with Stemm grapples.
