Reliable transport through the oven: flexible conveyor system
Your PCB passes through various system segments during the soldering process: from the preheating zone to the peak zone, and finally to the cooling tract. The most important factor for continuous processing is reliable conveyance. Our systems provide users with a customized conveyor.
Whether large or small, thick or thin, long or short – our conveyor systems can be ideally adapted to your PCB. Conveyor lanes and transport speeds are flexibly adjustable. In this way, the VisionXS makes lead-free or lead-containing soldering processes possible in a single reflow system..
Getting safely from A to B: flexible conveyor systems
Your PCB passes through various system segments during the soldering process: from the preheating zone to the peak zone, and finally to the cooling tract. The most important factor for continuous processing is reliable conveyance. Our systems provide users with a flexible conveyor.
Whether large or small, thick or thin, long or short – our conveyor systems can be ideally adapted to your PCB. Conveyor lanes and transport speed are flexibly adjustable. In this way, the VisionXP+ makes lead-free or lead-containing soldering processes possible in a single reflow system.
Various conveyor options
Various conveyor options are available depending on system configuration:
- Single-lane conveyor
- Two-lane conveyor (synchronous, asynchronous)
- Multi-track conveyor
- Quad-lane conveyor
With or without center support – the choice is yours!
Reliable and clean – effective Residue Management
Substances are released from the PCBs, the solder paste and the components during production with modern SMT manufacturing lines, and these can lead to contamination of the soldering system and must therefore be filtered out of the process gas. Modern ovens with nitrogen atmosphere are equipped with so-called residue management systems which recirculate process gas within the system and purify it.
Residues which accumulate during soldering are separated by the VisionXC with the help of an efficient filter unit. The 1 to 3-stage residue management system is integrated at the front of the system. Each stage consists of a cooler and a filter. Liquid and crystalline residues are reliably removed by means of this combination. This results in minimal maintenance costs and more efficient production.
The advantages at a glance:
- Thorough purification and a clean process chamber
- Solution integrated into the system
- Reliable process
- Easily accessible
- Minimal maintenance costs
The residue management function included in the VisionXS and VisionXP+ combines two different modes of action: pyrolysis in the heat zone and cold condensation in the cooling tract’s filter units. Liquid and crystalline residues are effectively removed by means of this combination. Residues are separated with the help of a special granulate during pyrolysis.
Long molecular chains are broken down (cracked) into smaller elements by means of thermal fission. Temperatures ranging from 500 to 900 °C are required to this end. Afterwards, the molecular chains are small enough to be taken up by the granulate and removed from the production process. The granulate only needs to be changed once a year, making the pyrolysis unit easy to maintain – and you profit from minimal downtime. Your manufacturing processes continue to run smoothly.
Liquid residues condense above all on the cooling tract’s filter units, by which they are then removed. The system is easy to clean. The filters are exchanged in sets at the back of the system. The process chamber doesn’t even have to be opened.
In order to make your manufacturing system even more efficient, the VisionXP+ is optionally available with double pyrolysis. Your system’s cleaning efficiency is significantly increased. The first pyrolysis unit is located underneath the inlet area. It purifies the nitrogen from the preheating zones. The second pyrolysis unit is installed beneath the outlet area and filters the process gas from the peak zones. Cleaning efficiency is significantly increased for the process gas and the soldering system’s chambers are kept clean and dry with very little maintenance and minimal downtime.
Advantages of VisionXP+ Residue Management
- The system is kept clean and dry in the inlet area, as well as in the preheating and peak zones
- Double pyrolysis for increased cleaning effectiveness (optional)
- Minimal maintenance: the pyrolysis unit is entirely maintenance-free for a full year
- Long granulate service life (roughly one year)
Multiple applications of vacuum
The VisionXP+ with vacuum option reliably removes pores, gas occlusions and voids immediately after the soldering process – while the solder is in an ideally molten state. Void rates of less than 2 % are made possible by vacuum of down to 2 mbar. Pressure and speed can be individually adjusted. This integrated solution results in a more time-efficient and stable production sequence. Time-consuming processing of the PCB in an external vacuum system is no longer necessary – the workpieces are transferred from the peak zones directly to the vacuum process.
Vacuum after the soldering process for fewer voids
Vacuum down to 2 mbar for reducing the number of voids in the solder joints
- Three-part conveyor: preheating and peak zone, vacuum module, cooling tract
- Infinitely adjustable, automatic advancing of the process chamber to the processing or the maintenance position
- Clean vacuum chamber thanks to two pyrolysis units and separate filtering of the depressurized atmosphere in the vacuum chamber
- Minimal downtime thanks to low maintenance
- Outstanding cooling performance, cooling time can be extended by means of synchronization
Effective cooling of the PCBs
Depending on system length, the VisionX is equipped with a 2, 3 or 4-stage cooling tract. The fans in the individual zones, which can be controlled separately as an option, allow for accurate control and cooling gradients can be correspondingly influenced. This assure stress-free cooling for your PCBs to below 50 °C, for lead-free soldering as well.
Energy-efficient system ensures reduced operating costs
The VisionXP+ is our best-in-class convection reflow soldering system which is clearly in line with the trend towards dealing with natural resources in an environmentally sound fashion. The industry sector will have to do some rethinking – and machinery manufacturing won’t be able to ignore this development.
Rehm’s energy concept combines a top quality, sustainable production system with the requirements of modern manufacturing companies. Special emphasis was placed on energy-efficiency, reduced emissions and low operating costs during development of the VisionXP+.
With the help of the VisionXP+, our customers are verifiably able to reduce energy consumption by up to 20 % and produce 10 tons less CO2 per year on the average. A true energy wizard with outstanding performance.
Unique technological advantages:
- Process stability
- Environmentally aware management of resources
- Greatly reduced consumption of energy, nitrogen and coolant water in the standby mode
- Outside panel temperature of max. 15° C above room temperature
- Noise level reduction to less than 70 dB
- Full control thanks to monitoring of current, nitrogen and energy consumption for cooling
- Durable insulation for greatly reduced transfer of heat to the environment
- Minimal maintenance costs
- Efficient residue management
- Outstanding traceability through the use of numerous software tools
Electric Energy Saving
* only in combination with option nitrogen control