Collapsible core assembly for a molding apparatus
AssigneeProgressive Components International Corporation
InventorGarry Zydron
Life of this patent
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Abstract
A collapsible core device for molding articles around the core device in a mold cavity includes a first sleeve, a second sleeve and an expansion member. The first sleeve includes a plurality of first ribs extending from a first base in an axial direction and defining a discontinuous first perimeter surrounding a channel. The second sleeve includes a plurality of second ribs extending from a second base in an axial direction and defining a discontinuous second perimeter surrounding the central channel. Each of the second ribs is arranged between adjacent ones of the first ribs. The expansion member is fittable within the central channel to displace the first and second ribs outwardly to form an overall perimeter defined by the first and second ribs.
Claims20
A collapsible core device for molding articles around said core device in a mold cavity, comprising:
- a first sleeve member having a plurality of first ribs extending from a first base in an axial direction, said plurality of first ribs defining a discontinuous first perimeter surrounding a channel;
- a second sleeve member having a plurality of second ribs extending from a second base in an axial direction, said plurality of second ribs defining a discontinuous second perimeter surrounding said central channel;
- each of said second ribs arranged between adjacent ones of said first ribs;
- and
- an expansion member, fittable within said central channel to displace said first and second ribs outwardly to form an overall perimeter defined by said first and second ribs.
A method of assembling a collapsible core device for molding articles around said core device in a mold cavity, comprising:
- providing a first sleeve having a plurality of first ribs extending from a first base in an axial direction, said first ribs defining a discontinuous first perimeter surrounding a channel;
- providing a second sleeve having a plurality of second ribs extending from a second base in an axial direction, said second ribs defining a discontinuous second perimeter surrounding said central channel;
- inserting said second sleeve within said first sleeve to the extent that each of said second ribs is arranged between adjacent ones of said first ribs;
- and
- providing an expansion member configured to be forcibly fit within said central channel;
- forcibly fitting said expansion member within said central channel to displace said first and second ribs outwardly to form an overall perimeter defined by said first and second ribs for molding an article around said overall perimeter.
Dependencies are inferred from the claim text.