Mold including a locking device
The invention relates to a mold ( 1 ) for molding, in particular by injection, that comprises two half-molds ( 2, 3 ) each defined by a side surface ( 21, 31 ), a front face and a rear face. One at least of said two half-molds is to be associated with means for opening and closing the mold. The two half-molds can be brought into contact at the level of a junction plane ( 1 ) when the mold is in the closed position. The mold is characterized in that one half-mold is provided with a locking device ( 6 ) that comprises: at least one latch ( 7 ) that can be simultaneously housed in a recess ( 25 ) in each half-mold ( 2, 3 ); and at least one independent system ( 8 ) capable of bringing together or separating the latch ( 7 ) and the recesses ( 25, 35 ) in which the latch ( 7 ) is to be received, and including one or more jack(s) ( 8 ) including a chamber connected to the half-mold, a piston capable of movement in said chamber, and a rod connected to the piston and to which the latch is attached.
1. A mold for molding comprising two half-molds each defined by a side surface, a front face and a rear face, at least one of the two half-molds being designed to be associated with means for carrying out the opening and the closure of the mold, the front faces of the two half-molds being capable of coming into contact at a parting line when the mold is closed,
wherein each of the two half-molds has at least one recess arranged on the side surface, said recesses extending parallel to each other, each of said recess having an opening, a bottom, two end surfaces substantially orthogonal to the parting line, and two opposite side faces, between the opening and the bottom, the parting line being closer to one side face than to the other, the parting line and the closer side face defining an angle (A) between 2° and 20°,
wherein at least one of the two half-molds is fitted with at least one locking device comprising:
at least one latch made in one block having a C-shaped section to match the at least one recess of each half-mold, said latch comprising two tenons extending parallel to each other and capable of being housed respectively in the recesses of the half-molds, each tenon having an inner surface comprising a bearing plate comprising a slidable material and an outer surface opposite to the inner surface, the inner surface arranged to contact the side surface of the recess closer to the parting line, wherein when the tenons are housed respectively in the recesses of the half-molds, the outer surface of at least one tenon contacts the side face of the recess farther from the parting line; and
at least one standalone system capable of bringing the latch toward and away from the recesses and comprising a cylinder comprising a chamber attached to a support coupled to the side surface of at least one of the two half-molds, a piston capable of moving in said chamber and a rod secured to the piston and to which the latch is attached, the cylinder can move the piston in translation along a thrust axis, the rod being positioned out of the chamber when the locking device is closed, and positioned in the chamber when the locking device is open.
2. The mold as claimed in claim 1 , wherein the thrust axis of the cylinder corresponds to an axis of movement of the latch.
3. The mold as claimed in claim 1 , wherein a first half-mold of the two-half molds is designed to be associated with a fixed platen, a second half-mold of the two half-molds is designed to be associated with a movable platen, at least one of the platens or at least one of the half-molds being fitted with means for injecting material to be molded and means for ejecting a molded part.
4. The mold as claimed in claim 1 , wherein each recess of a first half-mold of the two half-molds is positioned in symmetry with the recess of a second half-mold of the two half-molds relative to the parting line.
5. The mold as claimed in claim 1 , wherein the thrust axis extends substantially along the parting line.
6. The mold as claimed in claim 1 , wherein the angle (A) is between 3° and 10°.