Abstract: An apparatus and method for the production of bi-material hollow bodies by injection overmolding. The apparatus includes: n base molding cavities or groups of base molding cavities inserted between n+1 overmolding cavities or groups of overmolding cavities or vice versa; and 2n cores or groups of cores which are fixed to a core holder plate mounted such that it can move in a transverse direction on a base plate that is actuated to move in a longitudinal direction in order alternately to insert each core into one of the base molding cavities, so as to mold a first layer, and into one of the overmolding cavities, so as to overmold a second layer. The apparatus also includes an ejecting device for ejecting the finished bi-material hollow bodies and a valve for alternately distributing the molding material to one or the other of the outer cavities.

Abstract: The invention relates to a guide column with a double ejection mechanism of plates acting simultaneously as a guide column for the ejector plates and as a mechanism for the movement of the two sets of ejector plates in two sequenced movements.

Abstract: The invention relates to a slide mechanism comprising an ejector shaft (2) with a first end portion (2c) attached to a mobile ejector plate (3), a second conical end portion (2a) which ends in a protrusion (2b) coupled to a cam (6), the protrusion (2b) acting as a rotation shaft on which the cam (6) can oscillate; a wedge-shaped slide (5) with a molding portion (5d), an inclined segment (5a) between a push surface (5b) which is in contact with the part to be obtained (10) and a base segment (5c) and a sliding passage (14) which extends through the slide (5) in which at least one portion of the cam (6) slides in parallel with the negative (11a); a fixed sliding support (4) with an axial passage (4a) through which the ejector shaft (2) axially slides, and a slope (4c) on which the inclined segment (5a) of the slide (5) shifts, with a complementary inclination to that of the inclined segment (5a) of the slide.

Abstract: The invention relates to a sealed bearing which comprises a body with a general cylindrical configuration for its assembly in the housing of a mold or support body, and has a cylindrical inner hole for the assembly and balancing of the tight movement of a rotary shaft or core pin provided with internal cooling. The body has: an inner channel for the assembly of a dual-effect rotary seal activated by a first O-ring seal; an outer channel for the assembly of a second O-ring seal for the static sealing of the bearing in the housing of a mold or support part; and, at one of its ends, a head with peripheral planes and threaded holes for its grip and extraction from the housing of the mold or support part.

Abstract: An apparatus and method for the production of bi-material hollow bodies by injection overmolding is disclosed. The apparatus includes: n base molding cavities or groups of base molding cavities inserted between n+1 overmolding cavities or groups of overmolding cavities or vice versa; and 2n cores or groups of cores which are fixed to a core holder plate that is mounted such that it can move in a transverse direction on a base plate that is actuated to move in a longitudinal direction in order alternately to insert each core into one of the base molding cavities, to mold a first layer, and into one of the overmolding cavities, to overmold a second layer. The apparatus also includes an ejector for ejecting the finished bi-material hollow bodies and a valve for alternately distributing the molding material to one or the other of the outer cavities.

Abstract: A numbering apparatus incorporates a push rod which is pushed mechanically by an ejector plate or other mechanism of an injection mold in each injection process. The push rod moves, in a linear direction, a link attached to a central cylinder which turns inside wheels having, on their outer face, marking digits. The wheels have an inner toothing, on which pressure is exerted by a comb, made up of comb teeth, that protrude externally from the central cylinder in order to change the position of the wheel in the forward direction of the central cylinder. The digit displayed, while also incorporating magnets, matching up with the outer face of the wheel which assist in securing the position of the comb, thereby preventing the wheel from turning while the cylinder is sliding back.

Abstract: Having a body that forms the marking insert body. This body has a central opening into which the marking case will be inserted and a ring being set out externally on the side to be inserted into the mould, on which different motifs to be transferred to the moulded body, will be engraved. Internally it has a nut secured by means of a spring to the closing end-cap, the shaft of the marking unit screwing into said nut, the spring staying in tension while in use, and retaining the marking insert from a possible withdrawal.

Abstract: The numbering machine comprises a series of cams (2) and a series of wheels (3), each cam (2) being connected with a wheel (3), so that the turning of a cam (2) signifies the turning of a wheel (3). The cams (2) have on their periphery nine projections (17) and a recess or hollow (18), while each wheel (3) has on its periphery the digits corresponding to the first nine numbers.