Sealing a service panel in the washing machine rear wall
The reference material presented here, FERMAPOR K31-A 9260-26 and B-N (B-component), is a room-temperature-curing 2- component polyurethane foam for the sealing of service panels in washing machine rear walls. It has already proven itself in many years of use by leading appliance manufacturers.
The polyurethane sealing foam is applied directly to the component using FIPFG (Formed-In-Place-Foam-Gasket) technology and our fully automated dosing machines, very precisely, safely and efficiently.
Bespoke sealing solutions for the washing machine
Polyurethane foam gasket for sealing a service panel in the washing machine rear wall
If desired, we can also customize our polyurethane sealing foams to meet your specific component requirements.
Influencing factors include pot life until start of foaming, curing time, and the viscosity, hardness and adhesion properties. Thanks to a mixed-cell foam structure, the closing forces when installing the foam gasket are low.
The different reaction phases of the sealing foam in the chronological sequence
Reference material
| Service panel in the washing machine rear wall | ||
| FERMAPOR K31-A-9260-26 | ||
| FERMAPOR K31-B-N | ||
| Mixing ratio | 6 : 1 | |
| Pot life time | 29 sec. | |
| Tack-free time | 4 min. | |
|
Viscosity of the A component |
33,000 mPas | |
| Density of the foam | 0.18 g/cm³ | |
| Hardness (Shore 00) | 21 | |
| Temperature resistance | from -40 to + 80 °C | |
| Pretreatment | Plasma / Korona / Primer |
In addition to the reference products, we develop material systems according to your individual requirements. Influencing factors include pot life until start of foaming, curing time, and the viscosity, hardness and adhesion properties.
Repeated opening and re-closing of the service panel for maintenance purposes, while maintaining consistent sealing effect
FERMAPOR K31 polyurethane foam gasket compensates for component tolerances during sealing and has a very good resetting ability of the seal foam structure.
This allows repeated opening and re-closing of the service panels for maintenance purposes, while maintaining a consistent sealing effect of the foam gasket.
It exhibits excellent long-term behavior even after years of continuous use and has good temperature resistance within a range of -40 to +80 °C.
The video shows the polyurethane foam seal FERMAPOR K31 in cross section - first in the uncompressed state, then 50 % compressed, so that the sealing function of the seal is given.
Cross-section of a polyurethane foam bead – unpressed
Cross-section of a polyurethane foam bead with approx. 50 % compression
DM 502 mixing and dosing system with 3-axis linear robot for the sealing of service panels in washing machine rear walls with polyurethane foam
Flexible and fully automatic – fully in line with your requirements
The reference configuration shown here for true-to-contour application of FERMAPOR K31 2-component polyurethane sealing foam to the rear wall covers of washing machines consists of the DM 502 mixing and dosing system with a 3-axis linear robot and the WT 1-LEVEL shuttle table. Parts are picked up and processed in continuous shuttle mode in one plane.
Alternatively, we can offer the WT 2-LEVEL shuttle table with pick-up plates in two planes situated one above the other in shuttle mode.
The highly dynamic LR-HD 3-axis linear robot used or, alternatively, the highly efficient LR-HE plus ensures that the MK 800 PRO precision mixing head is guided over the component true to contour.
At the same time, the mixing head applies the polyurethane foam to the pre-programmed contour fully automatically with high dosing accuracy.
After the dosing cycle, the coupling point of the foam gasket closes seamlessly and is thus almost invisible. The applied material foams, expanding to several times its original volume, and forms an elastic soft foam gasket with the desired foam hardness at room temperature.
Due to the chemical reaction of the FERMAPOR K31 material components, good adhesion to the component is usually achieved. A cross-linked structure is formed afterwards, which is extremely resistant to moisture and temperature effects.
Our mixing and dosing machines can be operated easily and intuitively without requiring much training. Thanks to the automatic logging of dosing program data, all process data can be traced and evaluated by the machine operator via the CONTROL 2 operating panel while production is running.
In all solutions, our main focus is on extremely reliable plant engineering, minimized maintenance times and consistent dosing quality. As process experts, we support you with tailored advice for the automation of your manufacturing processes.
Mixing head 825 PRO
CONTROL 2
MP 2 Mobile panel
WT 1-LEVEL shuttle / sliding table
Dosing machine cabinet
Control cabinet
Supply Tap
Elevator
Mixing head 825 PRO
MK 800 PRO precision mixing head with high-pressure water rinsing or alternative component rinsing system
More information to our mixing headsCONTROL 2
Optionally available: CONTROL touchscreen operating panel (21.5“) for operating the dosing system
More information to our operating panelsMP 2 Mobile panel
The multifunctional MP 2 mobile panel (10.1” WXGA TFT) enables convenient operation of the dosing system.
More information to our operating panelsWT 1-LEVEL shuttle / sliding table
Two pick-up plates operating in pendulum mode in one plane
More information to our shuttle tablesDosing machine cabinet
The dosing machine cabinet contains the components of the dosing periphery, e.g. the dosing pumps.
More information to our dosing machine cabinetsControl cabinet
The control electronics, safety engineering and industrial PC are installed in the control cabinet.
More information to our control cabinetsSupply Tap
Optional: Automatic SUPPLY TAP drum refilling station for low-viscosity products, e.g. isocyanate (B-component)
More information to our refilling stationsElevator
Optional: Automatic ELEVATOR drum refilling station for the A-component with pneumatic lift and agitator
More information to our refilling stations