Pracovn  hlava pro trval  tvarov n  hrdla na koncov  sti trubky z plastu pro pou it  v automatick m za° zen  (1) na tv °en  hrdel na koncov²ch stech (50) plastov²ch trubek je ovl dan  tlakovou tekutinou a obsahuje formu (52), opat°enou dutinou (80) pro zasunut  koncov  sti (50) trubky (51), uveden  teplem do plastick ho stavu, a s tvarovan²m vnit°n m povrchem (53). D le obsahuje trn (55), zasunuteln² do koncov  sti (50) trubky (51), uspo° dan² v ose formy (52) a opat°en² p° vodn mi kan ly (58) tlakov  tekutiny, vystupuj c mi z jeho povrchu (81) a p° rubu (60) ulo enou souose a posuvn  vzhledem k trnu (55) a form  (52) a opat°enou dorazovou plochou (82) pro dosednut  okraje koncov  sti (50) trubky (51). D le obsahuje t snic  prvky (59), uspo° dan  na povrchu (81) trnu (55) a ur en  pro spolup soben  s vnit°n m povrchem (83) koncov  sti (50) trubky (51). Forma (52), trn (55) a p° ruba (60) spolu ohrani uj  tvarovac  komoru (72) koncov  sti (50) trubky (51), kter  obsahuje prvn  tlakovou komoru (63), uspo° danou mezi povrchem (81) trnu (55) a vnit°n m povrchem (83) trubky (51). Forma (52) je d le opat°ena p° vodn mi kan ly (54) pro tlakovou tekutinu, kter  vystupuj  z jej ho tvarovan ho vnit°n ho povrchu (53), a trn (55) je opat°en tvarovac m povrchem (81). Na vnit°n m povrchu (53) formy (52) jsou uspo° d ny t snic  prvky (59) pro spolup soben  s vn j  m povrchem (84) koncov  sti (50) trubky (51) umo  uj c  ut sn n  ulo en  trubky (51) v hlav  (66). Tvarovac  komora (72) je trubkou (51) rozd lena a obsahuje tak  druhou tlakovou komoru (64), uspo° danou mezi vn j  m povrchem trubky (51) a vnit°n m povrchem (53) formy (52), p°i em  ob  tlakov  komory (63, 64)
Output: The working head for the neck n-shaped ends at the ends of the plastic tube for use in the automatic device (1) on the neck sockets on the plastic tube ends (50) is pressurized and contains the mold (52) provided with a cavity (80) for inserting the ends of the tube (50) of the tube (51), brought heat into the plastic, and with the shaped inner surface (53). In addition, the mandrel (55) retractable to the ends of the tube (51) of the tube (51) is arranged in the mold axis (52) and provided with a fluid channel (58) of the fluid pressure exiting it. the surface (81) and the back (60) positioned coaxially and slidable relative to the mandrel (55) and the mold (52) and provided with a stop surface (82) for abutting the edge of the ends of the tube (51). The bottom comprises elements (59) arranged on the surface (81) of the mandrel (55) and intended to cooperate with the inner surface (83) of the ends of the tube (50) of the tube (51). Form (52), mandrel (55) and tube (60) together deflect the forming chamber (72) of the end of the tube (50) of the tube (51), which includes a first pressure chamber (63) disposed between the surface (81) the mandrel (55) and the inner surface (83) of the tube (51). The mold (52) is provided with a pressurized fluid passage (54) which protrudes from its molded inner surface (53), and the mandrel (55) is provided with a molding device. surface (81). On the inner surface (53) of the mold (52), the female elements (59) are arranged to co-operate with the outer surface (84) of the tube ends (50) of the tube (51). tubes (51) in heads (66). The forming chamber (72) is divided by the tube (51) and thus comprises a second pressure chamber (64) disposed between the outer surface of the tube (51) and the inner surface (53) of the mold (52). ob chamber pressures (63, 64)