Mold for a plastic filter
AssigneeJuken Fine Tool Co., Ltd.
InventorChihiro Kawai
Life of this patent
Estimating the term…
Abstract
A mold, for molding a cylindrical filter having a narrow-pitched mesh structure through resin injection molding, has a cavity divided into sections radially freely attachable/detachable. The sections of the cavity being formed as stacked assemblies bodies each having a number of thin plates, and with edge portions of alternating ones of the thin plates projecting further radially inward than edge portions of interposed alternating ones of the thin plates A core fits in the cavity a defines inside surface of the mesh structure. Air existing between the core and the cavity is externally released from gaps in the stacked thin plates during resin injection.
Claims3
A mold for a plastic filter, comprising:
- at least a pair of mold sections defining a cylindrical cavity in an assembled state;
- a core fittable in the cylindrical cavity for molding the filter between an outer circumference of the core and inner circumference of the cavity,
- the mold sections being freely attachable/detachable in direction away from a center line of the cylindrical cavity,
- the mold sections each being a stacked body formed by stacking a number of thin plates that have inner circumferences defining each of horizontal cross-sections of the inner circumference of the cavity, alternating ones of the inner circumferences projecting further radially inward than interposed alternating other ones of the inner circumferences to form horizontal ridges defining horizontal grooves therebetween,
- inner end surfaces of the horizontal ridges being in contact with the outer circumference of the core, and
- wherein air existing between the core and the cavity is externally released from gaps between the stacked thin plates during resin injection.
A mold for a plastic filter, comprising:
- at least a pair of mold sections defining a cylindrical cavity in an assembled state;
- a core fittable in the cylindrical cavity for molding the filter between an outer circumference of the core and inner circumference of the cavity,
- the mold sections being freely attachable/detachable in direction away from a center line of the cylindrical cavity,
- the core being formed by stacking a number of thin plates of like geometry in a direction of the center line, outer circumference of the core being formed with a number of vertical ridges extending parallel to the center line that are circumferentially spaced from each other, with vertical groove portions formed between the vertical ridges,
- the vertical ridges having outer surfaces in contact with the inner surface of the cavity,
- said core defining an air passage within said core;
- and
- wherein air existing between the core and the cavity is externally released from gaps in the stacked thin plates during resin injection via said air passage.
Dependencies are inferred from the claim text.