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1. (WO2019025999) FORMING GROUP FOR PRODUCING SANITARY ARTICLES
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CLAIMS

Forming group (1) for producing sanitary articles, comprising at least one support frame (2), at least one first portion (3) and one second portion (4), associated with said frame (2), respectively bearing at least one first mold (5) and one second mold (6) selectively connectable to each other, so as to define at least one forming cavity (7) adapted to receive the casting of at least one pressurized fluid mixture which, once solidified, forms at least one sanitary article,

said first portion (3) and second portion (4) being connected to said frame (2) in hung configuration and being selectively and mutually approachable in a closed configuration, so as to bring into mutual contact said molds (5,6) in order to define said at least one forming cavity (7), and mutually movable away in an open configuration in order to allow the extraction of the sanitary article once it is formed inside said cavity (7),

characterized in that at least said first portion (3) comprises a plurality of pressing members (9, 10, 11) which abut against the perimeter surface (5b) of said first mold (5) in said closed configuration, at least one flexible and non-extensible tightening element (12) which encircles said pressing members (9, 10, 11), and traction means (18) associated with said tightening element (12). Group according to claim 1, wherein said tightening element (12) comprises at least one cable, or at least one chain, or at least one belt, or at least one strip, or a combination of the aforesaid elements, or a combination of separate portions of the aforesaid elements.

Group according to claim 2, wherein said traction means (18) comprise at least one actuator (19) provided with a fixed element (19a) joined to said first portion (3), and with a movable element (19b) joined to the first end (12a) and to the second end (12b) of said tightening element (12), said tightening element (12) being closed substantially like a loop around said pressing members (9, 10, 11).

Group according to one of the preceding claims, wherein each of said

pressing members (9, 10, 11) comprises an external portion (22) provided with means (23) for coupling with said tightening element (12), said coupling means (23) being adapted to allow the relative sliding of said tightening element (12) with respect to said external portion (22).

Group according to the preceding claim, wherein said coupling means (23) comprise a plurality of wheels (24) rotatably supported in said external portion (22), each of said wheels (24) comprising at least one peripheral portion (24a) in which said tightening element (12) is engaged.

Group according to claim 4 or 5, wherein each of said pressing members (9, 10, 11) comprises a respective operating portion (27) for abutting against the perimeter surface (5b) of said first mold (5), said external portion (22) comprising a substantially arc-shaped profile (28), said coupling means (23) being arranged along said profile (28).

Group according to one of the claims 3-6, wherein said traction means (18) comprise a first and a second transmission roller (25, 26) in which said tightening element (12) is engaged, interposed between said pressing members (9, 10, 11) and said actuator (19).

Group according to one of the preceding claims, wherein said first portion (3) comprises a first support reinforcement (14) and wherein said pressing members (9, 10, 11) comprise a first pressing member (9), a second pressing member (10) and a third pressing member (11) respectively associated with a first section (14a), second section (14b) and third section (14c) of said first support reinforcement (14), and wherein at the fourth section (14d) of said first support reinforcement (14) said traction means (18) are provided, said pressing members (9, 10, 11) being respectively arranged according to the three consecutive sides of a rectangle or of a square.

Group according to one of the preceding claims, wherein said first mold (5) is a female mold and said second mold (6) is a male mold, said first mold (5) comprising at least one recess (8) for the insertion of at least one respective relief (29) provided in said second mold (6) so as to define said forming cavity (7).

10. Group according to claim 8 or 9, wherein said first pressing member (9), said second pressing member (10) and said third pressing member (11) comprise respective first elastic connection means (30), second elastic connection means (31) and third elastic connection means (32) for respectively connecting to a first section (14a), second section (14b) and third section (14c) of the first support reinforcement (14) of said first portion (14), said first, second, third elastic connection means (30, 31, 32) being adapted to bring said pressing members (9, 10, 11) back into the respective rest positions at the end of each forming cycle.

11. Group according to one of the claims 8-10, wherein said first portion (3) comprises first means (36) for adjusting the position of said first pressing member (9) with respect to said first section (14a) of said first support reinforcement (14), and second means (45) for adjusting the position of said third pressing member (11) with respect to said third section (14c) of said first support reinforcement (14).

12. Group according to one of the preceding claims, wherein said second portion (4) comprises rotation means (53) for rotating said second mold (6) from a substantially vertical forming position, in use, to a position that is substantially horizontal for unloading the formed object, in use.

13. Group according to the preceding claim, wherein said rotation means (53) comprise at least one table (54), associated with said second mold (6), hinged to the second support reinforcement (49) of said second portion (4) at a first axis (55), and rotary actuator means (56) adapted to rotate said table (54) from said substantially vertical position to said substantially horizontal position, and vice versa.

14. Group according to the preceding claim, wherein said rotary actuator means (56) comprise at least one linear actuator (57) having a first end (57a) articulated to the second support reinforcement (49) of said second portion (4) at a second axis (58), and a second end (57b) articulated to said table (54) at a third axis (59) parallel to said second axis (58), so as to make a thrust crank gear.

15. Line for forming sanitary articles, comprising a support frame (2) provided with at least one horizontal structure (13), a plurality of forming groups (1) according to one of the claims 1-14, connected to said horizontal structure (13) in hung configuration and side-by-side each other, and pressing means provided at the ends of said horizontal structure (13), which act on suitable surfaces of the forming groups (1) that are situated at the ends of said plurality, in a manner so as to retain said forming groups (1) in the respective closed configurations wherein they define the respective forming cavities (7).