Injection chamber or container

An injection chamber or container that, applicable to be incorporated in machines for pressure die casting of non-ferrous materials and consisting in a cylinder (1) formed from an assembly that comprises an external envelope (2) and an internal insert (3) through which a material is passed under pressure through an opening (4) and pushed by means of a piston (5) from one end of the cylinder (1) to inside a mold (6) located at an opposite end, characterized in that an external diameter (d) of the internal insert (3) is smaller than an internal diameter (D) of the external envelope (2), between both diameters (d, D) a difference of size (a) existing so that it allows an introduction and extraction of the insert (3) in the envelope (2) directly without expanding it, and that a sole expansion the insert (3) sustains, by a heat of the material to be injected that passes through it when the cylinder (1) is operating, reduces to zero the difference of size (a) provoking its fixation within the envelope (2), wherein the envelope (2) comprises a cooling system that comprises two areas having a different degree of cooling;

• a first cooling area limited to a lower part of the envelope (2) distal to the mold, that means the part opposite to the opening (4), and a second cooling area located proximal to the mold (6) where the second cooling area comprises cooling the full circumference of the envelope (2), characterized in that the insert (3) possesses grooves (7) for radially inserting retaining parts (8) that are fixed to it with screws (9), acting as stop in the envelope (2), wherein the grooves (7) are recesses of an external surface of the end of the insert (3), in stretches that protrude externally to the envelope (2), and the retaining parts (8) are formed by both sectors of circumference that are adjusted to the grooves (7) remaining coupled on a rim of the envelope (3), on which surface screwed holes (10) have been pierced coincident with boreholes (11) provided in the parts (8) for the passage of the screws (9), and wherein the retaining parts (8) possess protrusions (8a) that are introduced in slots (3a) of the insert (3) preventing a rotation between the insert (3) and the envelope (2).