Control flap for controlled exhaust gas recirculation and method for its production

A control flap (1) comprising a flap body (2) and a circumferential seal (3) that is capable of sealing upon abutting a sealing surface (7) of an opening (8) to be sealed, the flap body (2) being made of a thermoplastic and the seal (3) being made of an elastomer, wherein

• the seal (3) is joined to the flap body (2) via a pressure plate (4) made of a thermoplastic;
• the flap body (2) has a recess (16) for receiving the seal (3) with the pressure plate (4), and the recess (16) forms a circumferential front abutment surface (17) toward the seal (3);
• the pressure plate (4) has a central receiving indentation (22) with a central ventilation opening (23);
• and
• the recess (16) of the flap body (2) has a central connection frustum (24) that is received by the receiving indentation (22) of the pressure plate (4).

A control flap (1) comprising a flap body (2) and a circumferential seal (3) that is capable of sealing upon abutting a sealing surface (7) of an opening (8) to be sealed, the flap body (2) being made of a thermoplastic and the seal (3) being made of an elastomer, wherein

• the seal (3) is joined to the flap body (2) via a pressure plate (4) made of a thermoplastic;
• the flap body (2) has a recess (16) for receiving the seal (3) with the pressure plate (4), and the recess (16) forms a circumferential front abutment surface (17) toward the seal (3);
• the pressure plate (4) has a central receiving indentation (22) with a central ventilation opening (23);
• and
• the recess (16) of the flap body (2) has a central connection frustum (24) that is received by the receiving indentation (22) of the pressure plate (4).

A control flap (1) for sealing against a sealing surface (7) that surrounds an opening (8), the control flap (1) comprising:

• a flap body (2) made of a thermoplastic and having a recess (16) with a front surface (17) facing toward the opening (8) when the control flap (1) is in a closed position, the front surface of the recess (16) of the flap body (2) having a central projection (24), a rim surrounding the recess (16) and facing toward a part of the sealing surface (7) spaced outward of the opening (8) when the control flap (1) is in the closed position;
• a circumferential seal (3) that is made of an elastomer, the circumferential seal (3) having a rear contact surface (14) engaged against the front surface (17) of the recess (16) in the flap body (2), an outer circumferential surface engaged against an inner circumferential surface of the rim, an inner circumferential surface and a front surface capable of sealing upon abutting the sealing surface (7) that surrounds the opening (8) to be sealed when the flap body (2) is in the closed position;
• and
• a pressure plate (4) made of a thermoplastic, the pressure plate (4) having a rear surface (21) with a central receiving indentation (22) having a central ventilation opening (23), the central receiving indentation (22) engaging the central projection (24) of the flap body (2) to hold the pressure plate (4) in the recess (16) in the flap body (2) with an outer circumferential edge section (11) of the pressure plate (4) engaging the inner circumferential surface of the seal (3) for holding the seal (3) in the recess (16).