Method for producing a rear wall of a seat backrest

A vehicle seat structure, comprising:

• at least one shell extending in a direction transverse to a direction of travel and having a front side relative to the direction of travel and a back side relative to the direction of travel, wherein the shell has an overall flat and planar shape and the planar shape possesses no curvature,
• wherein the shell comprises an inner portion, an outer portion, and a frame structure;
• reinforcement ribs arranged on the inner portion and the outer portion of the front side of the shell;
• absorption ribs arranged on the inner portion and the outer portion of the back side of the shell;
• and
• structural insertion components arranged on the shell and/or the frame structure,
• wherein at least the shell and the frame structure are a one-piece, integrated, thermoplastic structural component,
• wherein the shell and the frame structure are molded such that the frame structure surrounds and encloses the inner portion of the shell in the direction transverse to the direction of travel and separates the inner portion of the shell from the outer portion of the shell,
• wherein the reinforcement ribs and the absorption ribs each include a plurality of horizontal ribs and vertical ribs that intersect each other,
• wherein the reinforcement ribs surround the structural insertion components on the front side of the shell in the direction transverse to the direction of travel.

A vehicle seat structure, comprising:

• at least one back shell extending in a direction transverse to a direction of travel and having a front side relative to the direction of travel and a back side relative to the direction of travel, wherein the shell has an overall flat and planar shape and the planar shape possesses no curvature,
• wherein the back shell comprises an inner portion, an outer portion, and a frame structure;
• reinforcement ribs arranged on the inner portion and the outer portion of the front side of the back shell;
• absorption ribs arranged on the inner portion and the outer portion of the back side of the back shell;
• and
• structural insertion components arranged on the back shell and/or the frame structure,
• wherein at least the back shell and the frame structure are molded to each other in a plastic to plastic manner by melting surfaces of the back shell and the frame structure and subsequently molding the back shell and the frame structure at those melted surfaces to form a one-piece, integrated, thermoplastic structural component,
• wherein the back shell and the frame structure are molded such that the frame structure surrounds and encloses the inner portion of the back shell in the direction transverse to the direction of travel and separates the inner portion of the back shell from the outer portion of the back shell,
• wherein the reinforcement ribs and the absorption ribs each include a plurality of horizontal ribs and vertical ribs that intersect each other,
• wherein the reinforcement ribs surround the structural insertion components on the front side of the back shell in the direction transverse to the direction of travel.