Edge-banding machine with pneumatic adhesive granulate feed

A glue pot filling device for an edge banding machine having a glue pot for melting an adhesive granulate, the glue pot filling device comprising:

• a storage container for holding an adhesive granulate;
• and
• an adhesive granulate conveying device for pneumatically conveying the adhesive granulate from the storage container into the glue pot of the edge banding machine wherein the adhesive granulate conveying device comprises:
• a conveying line having a first end section assigned to the storage container and a second end section assigned to the glue pot;
• a compressed air supply device assigned to the first end section for feeding compressed air into the conveying line or a negative pressure supply device assigned to the second end section for feeding a negative pressure into the conveying line;
• a filling nozzle arranged at the second end section for discharging the adhesive granulate to the glue pot;
• and
• an air baffle for cooling an end of the filling nozzle facing the glue pot.

A glue pot filling device for an edge banding machine having a glue pot for melting an adhesive granulate, the glue pot filling device comprising:

• a storage container for holding an adhesive granulate;
• and
• an adhesive granulate conveying device for pneumatically conveying the adhesive granulate from the storage container into the glue pot of the edge banding machine wherein the adhesive granulate conveying device comprises:
• a conveying line having a first end section assigned to the storage container and a second end section assigned to the glue pot;
• a compressed air supply device assigned to the first end section for feeding compressed air into the conveying line or a negative pressure supply device assigned to the second end section for feeding a negative pressure into the conveying line;
• and
• a filling nozzle arranged at the second end section for discharging the adhesive granulate to the glue pot;
• wherein:
• the filling nozzle is arranged pivotably about a pivot axis on the second end section of the conveying line;
• or
• the filling nozzle comprises a first and a second nozzle section, the second nozzle section being pivotable relative to the first nozzle section.

A glue pot filling device for an edge banding machine having a glue pot for melting an adhesive granulate, the glue pot filling device comprising:

• a storage container for holding an adhesive granulate;
• and
• an adhesive granulate conveying device for pneumatically conveying the adhesive granulate from the storage container into the glue pot of the edge banding machine wherein the adhesive granulate conveying device comprises:
• a conveying line having a first end section assigned to the storage container and a second end section assigned to the glue pot;
• a compressed air supply device assigned to the first end section for feeding compressed air into the conveying line or a negative pressure supply device assigned to the second end section for feeding a negative pressure into the conveying line;
• and
• a filling nozzle arranged at the second end section for discharging the adhesive granulate to the glue pot;
• wherein the storage container is a first storage container for receiving a first adhesive granulate and the glue pot filling device further comprises a second storage container for receiving a second adhesive granulate, wherein the adhesive granulate conveying device is switchable between pneumatic conveying from the first storage container and from the second storage container.

An edge banding machine with a glue pot for melting an adhesive granulate and a glue pot filling device, the glue pot filling device comprising:

• a storage container for holding an adhesive granulate;
• and
• an adhesive granulate conveying device for pneumatically conveying the adhesive granulate from the storage container into the glue pot of the edge banding machine wherein the adhesive granulate conveying device comprises:
• a conveying line having a first end section assigned to the storage container and a second end section assigned to the glue pot;
• a compressed air supply device assigned to the first end section for feeding compressed air into the conveying line or a negative pressure supply device assigned to the second end section for feeding a negative pressure into the conveying line;
• and
• a filling nozzle arranged at the second end section for discharging the adhesive granulate to the glue pot;
• wherein:
• the storage container is a first storage container for receiving a first adhesive granulate and the glue pot filling device further comprises a second storage container for receiving a second adhesive granulate;
• a first adhesive granulate conveying device is associated with the first storage container and a second adhesive granulate conveying device is associated with the second storage container;
• and
• further comprising a control unit adapted to switch between an operation of the first adhesive granulate conveying means and the second adhesive granulate conveying means to convey the first adhesive granulate or the second adhesive granulate into the glue pot.

A method of filling a glue pot of an edge banding machine with an adhesive granulate, the method comprising pneumatically conveying the adhesive granulate from a storage container along a conveying line into the glue pot;

• wherein the glue pot filling device comprises a storage container for holding an adhesive granulate, and an adhesive granulate conveying device for pneumatically conveying the adhesive granulate from the storage container into the glue pot of the edge banding machine, wherein the adhesive granulate conveying device comprises:
• a conveying line, which has a first end section assigned to the storage container and a second end section assigned to the glue pot;
• a compressed air supply device assigned to the first end section for feeding compressed air into the conveying line or a negative pressure supply device assigned to the second end section for feeding a negative pressure into the conveying line;
• and
• a filling nozzle arranged at the second end section for discharging the adhesive granulate to the glue pot;
• and
• wherein the method comprises the steps of:
• conveying the adhesive granulate by compressed air from the storage container through the conveying line to a granulate inlet opening of the filling nozzle;
• conveying the adhesive granulate by compressed air through a first section of the filling nozzle along a first direction, which includes a component opposite to the direction of gravity;
• conveying the adhesive granulate by gravity through a second section of the filling nozzle, which adjoins the first section to a granule outlet opening of the filling nozzle, in a second direction which is different from the first direction and has a component in the direction of gravity;
• and
• conveying at least part of the compressed air from at least one air escape opening, which is arranged in a transition region between the first section and the second section of the filling nozzle in a wall of the filling nozzle, in a third direction, which is different from the second direction.