US 8,708,692 B2Granted

Apparatus for injection molding

AssigneeDME Corporation

InventorsFrank Joseph Eigler, Craig Vincent Kovacic, Jon R. Garvey

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Abstract

An apparatus for facilitating removal and installation of mold insert members of a mold assembly from and into the clamp unit of an injection molding machine comprising a material distributing sub-assembly from which at least one material distributing nozzle projects, the apparatus comprises a two-part frame comprising an ejector part, an injection part being releasably connectable to the material distributing sub-assembly, and support pins spanning between the ejector part and the injection part when the injection part is separated from the material distributing sub-assembly, and guide elements projecting from the material distributing sub-assembly to engage a mold insert member received in the injection part and effective to align that mold insert member relative to the material distributing sub-assembly. The two-part frame comprises first clearance bores and second clearance bores allowing protrusion into the mold insert member of, respectively, the material distributing nozzles and the guide elements.

Claims20

Dependent claims

An apparatus for facilitating removal and installation of mold components of a mold assembly from and into a clamp unit of an injection molding machine, the apparatus comprising a two-part frame comprising an ejector part mounted and attached to a movable platen of the clamp unit, the ejector part configured to receive mold insert members of a primary core component of the mold assembly, and an injection part releasably connected to a material distributing sub-assembly of the mold assembly, the material distributing sub-assembly being mounted and attached to a fixed platen of the clamp unit, the injection part configured to receive mold insert members of a primary cavity component of the mold assembly, wherein the primary cavity component comprises a member for receiving the outlet ends of material distributing nozzles comprising the material distributing sub-assembly, a plurality of support pins projecting from one of the ejector part and injection part toward the other of the ejector part and injection part, the one of the ejector part and injection part not comprising the support pins comprising a plurality of support pin bores for receiving the support pins, the support pins and support pin bores lying outside the area circumscribed by sides of the mold insert members received in the two-part frame, the injection part being supported by the ejector part when the injection part is separated from the material distributing sub-assembly, a plurality of guide elements projecting from the material distributing sub-assembly toward the movable platen for engaging a mold insert member received in the injection part and effective to align that mold insert member relative to the material distributing sub-assembly.

A two-part frame for facilitating removal and installation of mold insert members comprising components of a mold assembly from and into the clamp unit of an injection molding machine, the mold assembly being adapted for releasable connection with a material distributing sub-assembly having at least one projecting material distributing nozzle and being mounted and attached to a fixed platen of the clamp unit, the frame comprising:

a. an ejector part for receiving mold insert members comprising a primary core component of a mold assembly;
b. an injection part for receiving mold insert members comprising a primary cavity component of a mold assembly;
c. a plurality of support pins and corresponding support pin bores arranged to support the injection part from the ejector part when the injection part is separated from the material distributing sub-assembly, the support pins and support pin bores being arranged to permit removal and installation of mold insert members from and into the two-part frame;
d. at least one clamping device for releasably clamping the injection part to the material distributing sub-assembly;
e. at least one first clearance bore through the injection part and a plurality of second clearance bores through the injection part, the first clearance bores located to receive projecting material distributing nozzles of the material distributing sub-assembly and the second clearance bores located to receive projecting guide elements of the material distributing sub-assembly, the first clearance bores and the second clearance bores allowing projecting nozzles and projecting guide elements, respectively, to protrude into mold insert members received in the injection part when the injection part is connected with the material distributing sub-assembly.

2 more elements

Dependencies are inferred from the claim text.