Drying and curing of end devices – Equipment for backend assembly
Rehm Thermal Systems offers innovative drying and curing processes for this field of application that meet any requirement. The new Pramo drying system guarantees best drying and curing results thanks to reliable looped band transport. The flexible carrier receptors are interchangeable, which means various assemblies – also special forms –can be guided safely and reliably through the plant.
Wind power renewable energy is playing an increasingly important role in the energy mix, electric drives have to deliver more and more power while consuming less energy. Rapid charging stations for hybrid and all-electric drives are in increasing demand and powerful battery storage devices are designed to help stabilise the power grid. They all have one thing in common – they all have control electronics and electronic housing assemblies inside them whose reliability has to be guaranteed at all times.
These highly complex assemblies use several manufacturing techniques, which are all there to ensure the reliability of the assembly. Depending on the application and requirements, the modules are painted to protect them from corrosion and environmental influences or have to be firmly integrated into the housing by means of encapsulation or adhesive technology. The drying and curing of different materials is an essential step of the process.
Unique technology advantages
- Reliable loop transport for optimum drying and curing results
- flexible goods carrier shots
- Transport of special shapes of different assemblies is possible
- Lowest heat radiation due to excellent insulation
- Flexible solutions for hot function test
- Optimum accessibility of the system technology and high ease of maintenance
Technical Details –
The assemblies on product carriers are transported through the system in the Pramo continuous dryer with “shuttles” – passing through several zones in which they are heated up to the appropriate temperature and then maintained at the set temperature for the drying / hardening process. Cycle time depends on the time the assemblies need to harden the materials within the drying system according to specifications.
- Loading | Unloading
A robot / handling system loads and unloads the components into the product carriers. Manual loading and unloading can be an alternative.
- Looped transport
The assembly is transported through the machine on a circular product carrier transport. This cycle time is adjustable. The transport is carried out in loops in order to achieve the longest possible throughput times and process a high number of units. This reduces the surface area as well as the height of the system. Depending on the number of product carriers, the Pramos is available as a 2-, 3 -, or 4-looped transport.
The assemblies for downstream processes are cooled in the cooling section. This allows the assemblies to be subsequently processed immediately. Each segment has cooled air blown onto the carrier with the assembly. The waste heat is transferred from the internal to the external water circuit via a heat exchanger and thus removed from the production room in an energy-saving way. Alternatively there is a residual management system with 2 cooler/filter units for cold condensation available instead of the heat exchanger. The filter can be easily cleaned in an ultrasonic bath for maintenance purposes. The return line can alternatively be run as an additional heating zone when the parts are unloaded when warm (warm function test).
- Measuring nacelle
The gondolas / carrier boats are equipped with a clamping unit for automatic loading with a robot. A measuring cable with prepared parts and memory meter is can be easily used via a quick-action fixation.
The system is controlled by software via a touchscreen user interface. All relevant process parameters such as throughput time and temperature are documented via a barcode on the product carrier nacelle and, if necessary, transferred to an MES system. SMEMA interfaces provide for the integration of the system into any production line.
Hot-Function test – Flexible solution with Pramo
The Pramo offers flexibility and security in the design and implementation of your testing tasks, including with warm function testing. Stable circular product carrier transport ensures safe transport of the assembly through the system and absolute process stability. This gives the Pramo sufficient capacity to reliably adhere to the desired test temperature, even when processing large parts in a short cycle time. In order to guarantee the removal of the assemblies at the appropriate temperature, the product carrier return is designed as an additional heating zone.
Line solutions – Example Pramo with 3 loops
2 – loop principle
3 – loop principle
4 – loop principle