Method and device for applying glue to a honeycomb structure
View Patent ↗A plunger is used for applying an adhesive to a honeycomb structure. The plunger includes a receptacle, a plunger covering, a metering unit and a chamber. The chamber being delimited by the receptacle and the metering unit and the plunger covering is located on a side of the metering unit facing away from the chamber. The plunger is used in conjunction with a device for applying an adhesive to a honeycomb structure, in particular a metal catalyst support for purifying the exhaust gas of mobile internal combustion engines.
1. A plunger for applying glue to a honeycomb structure, the plunger comprising:
a metering unit;
a plunger cover;
a receptacle, said receptacle and said metering unit defining and bounding a chamber, said plunger cover disposed on a side of said metering unit facing away from said chamber; and
a device for generating a predefinable pressure in said chamber.
2. The plunger according to claim 1 , wherein said device includes a regulating unit for setting the predefinable pressure in said chamber.
3. A plunger for applying glue to a honeycomb structure, the plunger comprising:
a metering unit;
a plunger cover;
a receptacle, said receptacle and said metering unit defining and bounding a chamber, said plunger cover disposed on a side of said metering unit facing away from said chamber; and
at least one sensor for determining a quantity of the glue taken up by the plunger.
4. The plunger according to claim 3 , wherein said sensor is integrated into at least one of said plunger cover and said metering unit.
5. A plunger for applying glue to a honeycomb structure, the plunger comprising:
a metering unit;
a plunger cover being embodied with a variable permeability, and said permeability increasing in radially outer regions of said plunger cover in comparison with centrally disposed regions; and
a receptacle, said receptacle and said metering unit defining and bounding a chamber, said plunger cover disposed on a side of said metering unit facing away from said chamber.
6. A plunger for applying glue to a honeycomb structure, the plunger comprising:
a metering unit;
a plunger cover;
a receptacle, said receptacle and said metering unit defining and bounding a chamber, said plunger cover disposed on a side of said metering unit facing away from said chamber; and
a regulating unit for setting a predefinable pressure in said chamber, said chamber and said regulating unit further defining a suction unit;
said plunger cover being applied to said metering unit and being secured to said metering unit by said suction unit.
7. A device for applying glue to a honeycomb structure, the device comprising:
at least one glue reservoir;
a drive; and
at least one plunger being movable in relation to said glue reservoir by said drive, said plunger containing:
a metering unit;
a plunger cover; and
a receptacle, said receptacle and said metering unit defining and bounding a chamber, said plunger cover disposed on a side of said metering unit facing away from said chamber.
8. The device according to claim 7 , wherein said drive generates a reciprocating movement of said plunger in a direction of an axis of said plunger.
9. The device according to claim 8 , further comprising at least one positioning unit for ensuring a substantially central configuration of an end side of the honeycomb structure with respect to the axis of said plunger.
10. A method for wetting a honeycomb structure with glue, which comprises the steps of:
providing a device for applying glue according to claim 7 ;
dipping the plunger at least partially into the glue reservoir being at least partially filled with the glue;
taking up the glue by way of the plunger cover and/or into the metering unit of the plunger;
removing the plunger from the glue reservoir for exposing at least the plunger cover;
setting a predefinable quantity of the glue in the plunger cover and/or the metering unit;
conducting away any excess quantity of the glue into the chamber on a side of the metering unit facing away from the plunger cover; and
placing the plunger cover in contact with an end side of the honeycomb structure.
11. The method according to claim 10 , which further comprises setting the predefinable quantity of the glue by at least partially generating a predefinable differential pressure between surroundings outside the plunger and the chamber.
12. The method according to claim 10 , which further comprises setting the predefinable quantity of the glue by using at least one sensor to determine a quantity of the glue being actually taken up by the plunger.
13. The method according to claim 10 , which further comprises:
collecting an excess quantity of the glue in the chamber; and
removing the excess quantity of the glue at predefined intervals.
14. The method according to claim 10 , which further comprises carrying out a reciprocating movement of the plunger in a direction of an axis of the plunger to dip into and emerge from the glue in the glue reservoir.