Method for producing a tub-shaped sanitary object made of plastic with a visible side and a bottom
A method for producing a tub-shaped sanitary object made of plastic with a visible side and a bottom, including the following steps: providing a plastic sheet to be molded to form the sanitary object; providing a forming device having a frame arrangement including a first frame with a first frame-shaped bending structure and a second frame with a second frame-shaped bending structure, wherein the plastic sheet is to be formed by bending structures; arranging and attaching the heated plastic sheet to the first frame; inserting the second frame into the open first frame into a forming end position so that the second frame takes along the plastic sheet with its bending structure when it is inserted, wherein the plastic sheet is formed into a tub shape by both the first and the second bending structure; and, cooling the formed plastic sheet.
1 . A forming device for producing a tub-shaped sanitary object made of plastic with a visible side and a bottom, comprising a frame arrangement having a first frame with a first frame-shaped bending structure and a second frame with a second frame-shaped bending structure, wherein the second frame can be inserted into the first frame while taking with it a plastic sheet which is fixed to the first frame until the second frame reaches a final forming position in which the tub-shaped sanitary object is formed, wherein the plastic sheet is deformed by the bending structures of both frames to form bends.
2 . The forming device according to claim 1 , wherein the first frame comprises a first framework structure, on which the first bending structure is arranged, and the second frame comprises a second framework structure, on which the second bending structure is arranged.
3 . The forming device according to claim 1 , wherein the first bending structure is formed by means of flat struts which have a rectangular cross-section and are connected in a frame-shaped manner and the second bending structure is formed by means of round or oval struts which are connected in a frame-shaped manner.
4 . The forming device according to claim 1 , wherein the first bending structure comprises an outer first frame-shaped structural section and a second frame-shaped structural section which extends parallel thereto and is lying inside the first structural section.
5 . The forming device according to claim 4 , wherein the two structural sections extend in a common plane, or in that the first structural section which is lying further outside is higher than the second structural section which is lying inside.
6 . The forming device according to claim 1 , wherein a fixing device is provided for attaching the plastic sheet to the first frame.
7 . The forming device according to claim 6 , wherein the fixing device is designed to clamp an edge section of the plastic sheet which is bent around the first bending structure, in particular the outer first structural section.
8 . The forming device according to claim 7 , wherein the fixing device comprises clamping strips which can be placed laterally against the first bending structure or the first structural section and clamp the edge section thereto.
9 . The forming device according to claim 1 , wherein a stop is provided on the first frame, against which the second frame or against which the plastic sheet can be moved during forming.
10 . The forming device according to claim 9 , wherein the stop is height-adjustable.
11 . The forming device according to claim 10 , wherein the first framework structure comprises a framework section which is arranged in a height-adjustable manner on vertical carriers and on which the stop is arranged.
12 . The forming device according to claim 11 , wherein the framework section is frame-shaped and is provided with two stop elements which are positioned offset with respect to one another.
13 . The forming device according to claim 1 , wherein a male forming element is provided on the second frame for forming the plastic sheet while forming a drain geometry.
14 . The forming device according to claim 13 , wherein a female forming element is provided on the first frame, which can be brought into operative connection with the male forming element in the forming end position.
15 . The forming device according to claim 14 , wherein the male forming element is movable by means of an adjusting means from a rest position, in which it is at a distance from the plastic sheet, into a forming position, in which it forms the plastic sheet while forming the drain geometry.
16 . The forming device according to claim 13 , wherein the male forming element or both forming elements are arranged on the first and on the second frame in their position which can be changed.
17 . The forming device according to claim 16 , wherein the female forming element is arranged on a carrier that is displaceably arranged on the first framework structure and the male forming element is arranged on a carrier that is displaceably arranged on the second framework structure.
18 . The forming device according to claim 17 , wherein both forming elements are displaceably arranged on the carrier.