A method is disclosed for dispensing a polyurethane mixture onto a substrate by generating a liquid mixture from reactive component resins; introducing the mixture in an inlet section of a dispensing device so as to advance it towards a planar-shaped outlet slit section, transversely to the advancement direction of the substrate; distributing the mixture along a gap chamber having a cross section diverging towards the outlet slit section; and dispensing the mixture through the outlet slit section, so as to deposit a thin, uniform film onto the substrate. Fractions of the mixture travel equal distances from the inlet section to the outlet slit section, in equal times, maintaining equal average speeds along each section having zones placed all at the same path distance either from the inlet section or from the outlet slit section.

According to the present invention, there is provided a foaming apparatus that discharges a foamable material obtained by mixing gas into a viscous material of a resin and dispersing bubbles in a liquid of the viscous material. The foaming apparatus includes: a pipe; a material supply unit; a gas supply unit; a first gear pump; a second gear pump; a third gear pump; a mixer; a discharge unit; and a control unit.

The invention relates to a process for producing rigid polyurethane (PUR) and polyurethane/polyisocyanurate (PUR/PIR) foams, comprising the steps of i) producing a reaction mixture containing the components A) an isocyanate-reactive component, B) a polyisocyanate component, and C) a blowing agent, and ii) applying the reaction mixture by using a system comprising at least one casting device. The casting device (100) having: a supply port (12) for feeding the reaction mixture (10), at least one discharge gap (13) extending in a transverse direction (Q) for the discharge of the reaction mixture (10), two gap-forming plates (14) arranged opposite one another, a gap space (15) extending between the gap-forming plates (14) above the discharge gap (13) in a height direction (H), wherein the reaction mixture can be introduced into the gap space (15), distributed over the length of the supply duct (16).

The present disclosure relates to a method and a system for applying a foamable reaction mixture to a moving outerlayer, the reaction mixture being applied from discharge openings on the outerlayer, and the outerlayer moves at a speed of 15 meters per minute relative to the discharge openings. The system also comprises 7 discharge openings.

The invention relates to a method and a device for applying a foamable reaction mixture to a moving cover layer (10), the reaction mixture being applied to discharge openings (400) on the cover layer (10) and the cover layer moving at a speed of 15 meters per minute relative to the discharge openings. The device also comprises 7 discharge openings (400).

Method of designing and manufacturing a distributor bar for use in a production line comprising a mixing head for providing a viscous foamable liquid mixture, a laminator with a predefined speed of at least 20 m/min, the distributor bar having a central inlet fluidly connected to a number of outlets via a main channel. The method comprises: choosing (3001) a geometry for the distributor bar and defining a set of geometrical parameters; assigning (3002) values to said parameters; creating (3003) a virtual model; simulating (3005) flow in said model by performing a Computational Fluid Dynamics simulation (CFD), taking into account (3004) a non-Newtonian shear thinning model; e) evaluating the simulated flow; building (2007) a physical distributor bar. A distributor bar, a production line, and a computer program product.

A dispensing system for dispensing a hot melt adhesive foam onto a substrate is described. The dispensing system comprises a pump having a first input to receive a hot melt adhesive and a second input to receive a gas, where the pump mixes the hot melt adhesive and the gas to produce a solution. The dispensing system also includes a temperature sensor to detect a temperature of the solution, a dispenser to receive the solution from the pump and dispense the solution, and a controller. The controller instructs the pump to operate at a first speed, receives the temperature of the solution, and instructs the pump to operate at a second speed that is different than the first speed in response to the signal.

Method of designing and manufacturing a distributor bar for use in a production line comprising a mixing head for providing a viscous foamable liquid mixture, a laminator with a predefined speed of at least 20 m/min, the distributor bar having a central inlet fluidly connected to a number of outlets via a main channel. The method comprises: choosing (3001) a geometry for the distributor bar and defining a set of geometrical parameters; assigning (3002) values to said parameters; creating (3003) a virtual model; simulating (3005) flow in said model by performing a Computational Fluid Dynamics simulation (CFD), taking into account (3004) a non-Newtonian shear thinning model; e) evaluating the simulated flow; building (2007) a physical distributor bar. A distributor bar, a production line, and a computer program product.

The present invention relates to a tool (W) having at least one first inlet opening (E1) and at least one second inlet opening (E2), and also at least one first outlet opening (A1), at least one second outlet opening (A2) and at least one third outlet opening (A3), wherein the second outlet opening (A2) and the third outlet opening (A3) alternate with the first outlet opening (A1). The present invention further relates to a process for producing a fiber/foam composite by extruding through the tool (W) and to the use of the tool (W) for production of a fiber/foam composite by extrusion.

The present invention provides a method for the continuous production of a PIR/PUIR/PUR foam cored sandwich panel (12) with metal sheets (16, 18) as facings at top and bottom, wherein the upper metal sheet (16) and the lower metal sheet (18) are continuously fed into a double belt (28), wherein a PIR/PUIR/PUR core material is applied between the upper metal sheet (16) and the lower metal sheet (18), wherein an adhesive is applied to the lower metal sheet (18), wherein a portion of the adhesive applied to the lower metal sheet (18) is applied to the upper metal sheet (16) by means of a rotating brush. The present invention further provides an apparatus for the continuous production of a PIR/PUIR/PUR foam cored sandwich panel (12) with metal sheets (16, 18) as facings at top and bottom.