Apparatus for pivoting a component or a group of components of an injection mold

Claim 2

In an apparatus for pivoting at least one component of an injection molding machine about a sector angle not greater than 180* and including a drive shaft provided with at least one helical drive groove formed in its outer surface, a control pin mounted for engagement within the groove for effecting a pivotal movement of the component, the machine including an injection mold unit composed of two clamping members movable relative to one another and arranged to support cooperating mold halves to permit opening and closing movements between such mold halves, with the pivot axis of the component being coincident with the horizontal axis of symmetry of the mold unit, and with the driving energy for the pivotal movement being derived from the opening or closing movements between the mold halves, the improvement wherein: the drive shaft is provided with two drive grooves, is mounted with its longitudinal axis coincident with the horizontal axis of symmetry of the mold closing unit, and is directly connected with, and serves as a pivot axis for, the component to be pivoted; the ends of each said drive groove terminate at diametrically oppositely disposed sides of said shaft in linear groove sections; one of said clamping members is a stationary clamping plate; and each said linear groove section for one said groove is in communication with one said linear groove section for the other said groove via a linear idling groove section, said idling groove section having a base surface which is inclined with respect to the axis of symmetry of the mold unit and extending radially outwardly in the direction toward said stationary clamping plate.

Claim 3

An apparatus as defined in claim 1, wherein each of said two drive grooves extend only over one-half of the circumference of the drive shaft, and wherein the terminal ends of each said drive groove enclose a sector angle of 180*.

Claim 4

An apparatus as defined in claim 1, wherein each of said two drive grooves is disposed in the outer surface of the drive shaft in such a way that corresponding base points of each drive groove are disposed diametrically opposite one another with respect to the shaft axis, and wherein the distances between corresponding base points of each groove are equal.

Claim 5

An apparatus as defined in claim 1, further comprising means for biasing said control pin toward the drive shaft.

Claim 6

An apparatus as defined in claim 1, wherein two diametrically oppositely disposed control pins are provided, each engaging one of said drive grooves.

Claim 7

An apparatus as Defined in claim 1, further comprising a stationary abutment member, wherein the other of said clamping members is a movable mold clamping plate, and wherein said abutment member is disposed at a distance from said movable clamping plate in the path of movement of the drive shaft.

Claim 8

In an apparatus for pivoting at least one component of an injection molding machine about a sector angle not greater than 180* and including a drive shaft provided with at least one helical drive groove formed in its outer surface, a control pin mounted for engagement with the groove for effecting a pivotal movement of the component, the machine including an injection mold unit composed of two clamping members movable relative to one another and arranged to support cooperating mold halves to permit opening and closing movements between such mold halves, with the pivot axis of the component being coincident with the horizontal axis of symmetry of the mold unit, and with the driving energy for the pivotal movement being derived from the opening or closing movements between the mold halves, the improvement wherein: the drive shaft is provided with two drive grooves, is mounted with its longitudinal axis coincident with the horizontal axis of symmetry of the mold closing unit, and is directly connected with, and serves as a pivot axis for, the component to be pivoted; and said apparatus comprises a stationary mold half constituting one of such cooperating mold halves, said stationary mold half comprising two units separated by a parting line and displaceable with respect to each other, one of said units includes a core mover within which a bore is situated such that its longitudinal axis is inclined with respect to the horizontal axis of symmetry of the mold closing unit, the other of said units includes a control pin which extends into said bore, both said units being adapted to receive therebetween spring means for effecting the displacement of said units, said core mover being movable in a radial direction to the horizontal axis of symmetry of the mold unit as a result of the engagement of said pin and bore.

Claim 9

In an apparatus for pivoting at least one component of an injection molding machine about a sector angle not greater than 180* and including a drive shaft provided with at least one helical drive groove formed in its outer surface, a control pin mounted for engagement with the groove for effecting a pivotal movement of the component, the machine including an injection mold unit composed of two clamping members movable relative to one another and arranged to support cooperating mold halves to permit opening and closing movements between such mold halves, with the pivot axis of the component being coincident with the horizontal axis of symmetry of the mold unit, and with the driving energy for the pivotal movement being derived from the opening or closing movements between the mold halves, the improvement wherein: the drive shaft is provided with two drive grooves, is mounted with its longitudinal axis coincident with the horizontal axis of symmetry of the mold closing unit, and is directly connected with, and serves as a pivot axis for, the component to be pivoted; and said apparatus comprises a stationary mold half constituting one of such cooperating mold halves, said stationary mold half comprising two units separated by a parting line and displaceable with respect to each other, one of said units includes a core mover within which a bore is situated such that its longitudinal axis is inclined with respect to the horizontal axis of symmetry of the mold closing unit, the other of said units includes a control pin which extends into said bore, both said units being adapted to receive therebetween spring means for effecting the displacement of said units, said core mover being movable in a radial direction to the horizontal axis of symmetry of the mold unit as a result of the engagement of said pin and bore.

Claim 10

Apparatus as defined in claim 7, for forming objects in two stages, wherein said core mover includes a core which forms a charging channel for the objects formed in the first of the two stages.

Claim 11

An apparatus as defined in claim 1, further comprising bushing means and associated bearing means, and wherein the control pin is rotatably mounted in said bushing means by said bearing means.

Claim 12

An apparatus as defined in claim 9, further comprising a movable mold half constituting the other of such cooperating mold halves, and a plurality of elastic ring means, wherein said bushing means is mounted in said movable mold half, and said plurality of elastic ring means are mounted between said bushing means and said movable mold half.

Claim 13

An apparatus as defined in claim 10, wherein the component to be pivoted is relatively movable in an axial direction with respect to said movable mold half.

Claim 14

In an apparatus for pivoting at least one component of an injection molding machine about a sector angle not greater than 180* and including a drive shaft provided with at least one helical drive groove formed in its outer surface, a control pin mounted for engagement with the groove for effecting a pivotal movement of the component, the machine including an injection mold unit composed of a stationary mold half, a stationary receptacle, and a movable mold clamping plate arranged to support a movable mold half to permit opening and closing movements between the mold halves, with the pivot axis of the component being coincident with the horizontal axis of symmetry of the mold unit, and with the driving energy for the pivotal movement being derived from the opening or closing movements between the mold halves, the improvement wherein the drive shaft is provided with two drive grooves, is mounted with its longitudinal axis coincident with the horizontal axis of symmetRy of the mold closing unit, and is directly connected with, and serves as a pivot axis for, the component to be pivoted, and the control pin is disposed in said stationary receptacle and said receptacle is disposed externally of said movable mold clamping plate and in a direction away from said stationary mold half.

Claim 15

In an apparatus for pivoting at least one component of an injection molding machine about a sector angle not greater than 180* and including a drive shaft provided with at least one helical drive groove formed in its outer surface, a control pin mounted for engagement with the groove for effecting a pivotal movement of the component, the machine including an injection mold unit composed of a stationary mold half, a stationary receptacle, and a movable mold clamping plate arranged to support a movable mold half to permit opening and closing movements between the mold halves, with the pivot axis of the component being coincident with the horizontal axis of symmetry of the mold unit, and with the driving energy for the pivotal movement being derived from the opening or closing movements between the mold halves, the improvement wherein the drive shaft is provided with two drive grooves, is mounted with its longitudinal axis coincident with the horizontal axis of symmetRy of the mold closing unit, and is directly connected with, and serves as a pivot axis for, the component to be pivoted, and the control pin is disposed in said stationary receptacle and said receptacle is disposed externally of said movable mold clamping plate and in a direction away from said stationary mold half.

Claim 16

An apparatus as defined in claim 12, wherein said stationary receptacle is plate shaped and has a central bore which receives one end of the drive shaft when the mold is closed and through which the drive shaft passes when the mold is opened.

Claim 17

An apparatus as defined in claim 12, further comprising an ejector rod, wherein said stationary receptacle supports said ejector rod.