Static oven for cycles
of vulcanization elastomer
This oven has been designed and manufactured using high-quality materials and features a 15 cm high-density thermal insulation and a sealed internal chamber. It has been developed to meet the technical requirements of post-curing processes for elastomeric materials such as NBR, silicone, and Viton, which require high temperature precision, uniformity, and air exchange.
High-efficiency motors, high-dissipation heating elements, and a carefully engineered ventilation system ensure a high level of thermal uniformity and process accuracy.
In addition, the oven can be equipped (optional) with an air-to-air heat exchanger which, by recovering heat from the exhaust fumes, preheats the incoming air. The level of heat recovery varies depending on several parameters, including operating temperature and inlet air temperature, but can reach an increase of 15–40 °C, corresponding to approximately 25% of the total energy consumption.
Some details:
- Manually adjustable air inlet valve
- Easily removable external panels for insulation inspection
- Sealed working chamber
- Door sealing ensured by mineral fiber gasket
- Double safety system for high temperatures
- Internal temperature uniformity within ±5 °C
- Insulated base
- Tilting raised platform for trolley loading
Construction data
Material: Stainless steel
Working temperature: Max: 250° C (300° C on request)
Gaskets: Fibreglass for high temperatures
Power: 18 / 36 Kw
Weight: 1,000 / 1,450 Kg
Internal brushing: Stainless steel
External brushing: Aluminised steel
Armoured heating elements: Stainless steel
Characteristics
The oven is characterized by the numerous characteristics that allow to improve the post- curing process.
Internal flaps
for adjusting the air flow
Heat exchanger
allows considerable energy savings
Motorized door
Control and regulation of incoming air
L.C.P. Valve
programmed chamber wash: expels the condensed fumes from the chamber.
Siemens PLC thermoregulator
improves control and temperature regulation
Air exchange
Air circulation is one of the most critical aspects in oven operation. Proper airflow management ensures uniform temperature distribution, reducing process times and improving the quality of the final product.
The adopted solution involves introducing clean air at the intake, which is then mixed with the already heated air inside the oven. The resulting airflow is introduced into the working chamber through adjustable dampers, allowing precise control of the air volume.
This system optimizes thermal distribution and ensures stable and uniform process conditions.
Safety systems
Although the system is highly reliable, potential faults cannot be completely excluded. For this reason, the electrical panel is equipped with a second temperature controller, completely independent from the PLC and connected to a dedicated temperature probe.
It is essential that this device is set at a temperature 20 °C higher than the vulcanization temperature, in order to provide an additional level of process safety.
Control system – Siemens PLC
The system is equipped with a Siemens PLC with the capability to store up to 49 programs. Thanks to Ethernet connectivity, the system can be interfaced with a PC and, through dedicated software, the oven can be fully managed remotely: from starting post-curing cycles to viewing temperature/time graphs and recording actual cycles associated with batch codes.
This configuration fully complies with quality standards requirements.
Alternatively, a Standard version of the controller is available, which does not include program storage.
Upon request, it is also possible to evaluate integration of the PLC with the company’s management system, subject to analysis by our IT department.
Technical features
Features
- Siemens PLC series 1211 with expansion for 1 PT100 (RTD) probe channel
- Siemens stabilized power supply 24V – 2.5 A
- Siemens KP300 monochrome operator panel
- Heating control via Gefran solid-state relays (25 A or higher, depending on power)
- Oven safety system in Category 4 with dedicated safety module
- Gefran 600 controller for redundant temperature control, with manual setting of maximum temperature
- Full oven management via PLC
- Parameter settings: cycle time (minutes), temperature without ramp, and thresholds
- Maximum temperature alarm
- Provision for Flite_1200 unidirectional recording system
Programming modes:
- Possibility to store up to 49 programs
- Each program includes: temperature set point, ramp time, holding time, and tolerance band
- Supply of electrical diagram and related certification
Technical support
– Electronic technician
– IT technician
– 2 mechanical service technicians
– Remote assistance modem for remote support
Optional
Shelves and trolleys
They facilitate handling. The removable shelves allow you to easily position materials to be treated
Rotating basket
Steel trolley with a rotating basket. Recommended for obtaining flatness of O-Rings and flat gaskets.
Cooling station
Both for deck and trolleys with a rotating basket, it allows quick cooling of materials, freeing the oven for new production cycles.
Basket with rods
Steel trolley with a rotating basket. Recommended for obtaining the flatness of O-Rings of larger dimensions.
Extraction hood installed on the door
Quick cooling motor: It allows a much larger amount of ambient air to enter, reducing cooling times. Air intake device controlled by an ON/OFF valve operated by a PLC
DESCRIPTION AND OPERATION:
The heat exchanger kit is installed on the oven exhaust flue and makes it possible to achieve:
- Energy savings
- Reduction of dust and volatile pollutants contained in the fumes emitted by the process.
In the standard configuration, commonly available on the market, the oven draws air from the surrounding environment and heats it by means of electric heating elements up to the desired operating temperature.
For example, the ambient temperature is 20 °C, while the operating temperature is 200 °C. The resulting temperature difference is therefore 180 °C.
With our device, the outgoing air preheats the incoming clean air up to 40–50 °C (depending on the opening of the intake valve).
Energy savings can reach 20% to 30% of the maximum power of the oven in operation.
This process therefore allows the incoming air to be heated while simultaneously cooling the outgoing exhaust fumes.
As a result, there is a partial reduction of plasticizers, which condense and collect in a container located beneath the heat exchanger, significantly reducing (depending on the quantity and type of rubber) the emissions and visible smoke from the exhaust stack.
The sensor installed in the upper section of the working chamber is considered an additional protection to the safety thermostat supplied as standard.
The sensor is interfaced with the PLC, which automatically sets a temperature 30 °C higher (recommended value) than the vulcanization cycle setpoint.
If the temperature exceeds this value, the PLC immediately cuts power to the heating elements and the ventilation motor, and closes the valve installed above the exhaust pipe in order to prevent any possible fire from feeding the extraction ducts.
This device also allows a large amount of ambient air to be introduced into the oven chamber and then expelled through your extraction system. This helps keep the oven clean and improves the vulcanization process.
Time and duration settings are managed via a suitably programmed PC.
Composed of:
- T-fitting with automatic ON/OFF valve;
- Motorized valve for air intake regulation;
- Installed safety thermostat.
Incorrect work cycle settings or unforeseen accidental failures may cause fires in the material being processed. Overheating inside the chamber, in the presence of gases generated during the post-curing process, may also lead to unpredictable explosions, as they occur instantaneously.
The FRONT SAFETY BAR is designed to prevent the door from being forced out of its housing due to a sudden increase in internal pressure.
The bar must be correctly positioned in order to close an electrical contact, which enables operation.
Technical data of some models
| Model | Internal volume (l) |
Internal dimensions (cm) |
Static trolley (ripiani / m2) |
Rotating trolley (lit.) |
|---|---|---|---|---|
| FG-MINI | 800 | 92 x 71 x 114 | 9 / 4 m2 | 200 |
| FG-S | 2.200 | 125 x 130 x 161 | 12 / 12 m2 | 650 |
| FG-N | 3.000 | 111 x 150 x 182 | 14 / 14 m2 | 600 |
| FG-L | 3.400 | 127 x 150 x 182 | 14 / 18 m2 | 850 |
| FG-XL | 4.900 | 174 x 150 x 182 | 28 / 27 m2 | 1.700 |
| FG-XL MAXI | 7.400 | 177 x 200 x 217 | 32 / 62 m2 | 2.500 |
WE ARE ABLE TO PROVIDE MADE TO MEASURE OVENS STUDIED TO SATISFY YOUR NEEDS
REQUEST A FREE QUOTE
We are at your complete disposal to design a customized solution
Our Ovens
Oven studied for the treatment of post-curing of elastomer materials such as NBR, Silicone, Viton, etc.
Max Temp. 200 / 300°C
Oven studied for the treatment of post- curing of elastomer, such as O-ring, for which flatness is required.
Max temp. 300°C
Oven studied for the specific application of sintering treatments on PTFE polymers.
Max temp. 450°C
Oven designed to hold the moulds before being installed on the press.
Max temp. 200°C
Contact immediately our experts for a free quote
Fill in the form below or call us at the number
+39 035 31.10.40
We have specialized for 20 years in the supply and consultancy of
scientific instrumentation for quality control and R&D laboratories.
Via Fiume Po, 50 – 24040 Stezzano (BG)
+39 035.31.10.40
www.forlabitalia.it
Carrelli a ripiani
Facilitano la movimentazione. I ripiani estraibili consentono di posizionare facilmente i materiali da trattare
Cesto rotante
Carrello in acciaio con cesta rotante. Consigliata per ottenere la planarità degli O-Ring e guarnizioni piane.