Apparatus for making plastic devices
AssigneeC & L Plastics, Inc.
InventorHarry E. Littleton
Life of this patent
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Abstract
An apparatus for injection molding of plastic lure skirts utilizes an openable mold wherein a conic cavity is formed between a pair of mold plates and a conic insert is selectively advanced to abut the inner surface of the conic cavity. A plurality of grooves are formed in the conic cavity which communicates with a tubular section wherein the soft plastic is introduced such that a body portion and a stranded skirt are formed when plastic is injected between the mold plates and the conic insert. The apparatus may be used for forming double skirted lures or conventional non-skirted lures by internal injection when a stripper bar is used to partially seal the mold distribution channel.
Claims14
Apparatus for injection molding of plastic articles using pressurized heated plastic from a defined source comprising in combination with said source:
- (a) fixed mold plate having a first plurality of molding cavities formed therein in a linear array and a groove formed therein intermediate said cavities, said groove intersecting said cavities proximal the middle of each cavity and communicating with said source;
- (b) a movable mold plate hingedly affixed to said fixed mold plate for selective relative movement to an abutting position and a displaced position, said movable mold plate having a second plurality of molding cavities formed therein for cooperative alignment with said first plurality of molding cavities to form a plurality of paired abutting cavities;
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- (c) a strip-like member removably placed in sealing relationship in said groove separating said groove from said cavities and having a plurality of apertures cooperatively spaced to provide individual communication between each pair of said plurality of abutting pairs of cavities and said groove.
An apparatus for forming plastic articles by injection of heated plastic from a source thereof into a reusable mold, comprising:
- (a) a fixed mold plate having at least one elongated distribution channel intersecting a plurality of mold cavities formed therein;
- and movable mold plate having a plurality of mold cavities formed therein for cooperative abutment against said fixed mold plate to form a series of spaced apart molds interconnected by said distribution channel;
- and a bar member removably inserted in said distribution channel to separate said distribution channel from said molds, with said bar member having an aperture therethrough adjacent each mold in said series providing communication between said distribution channel and each mold.
Apparatus for forming plastic articles by injection of the heated plastic from a source thereof into a reusable mold, comprising:
- (a) a first mold plate having a plurality of mold recesses formed thereon for selective communication with said source, each recess being semi-conical and tapering inwardly from one side of said mold plate;
- (b) a second mold plate mounted for selective movement into abutting relationship with said first mold plate and having a plurality of mold recesses formed therein for cooperative registration with the plurality of mold recesses formed in said first plate such that laterally opening conic molds are formed in said mold plate;
- (c) a plurality of cones mounted for selective movement into said conic molds to laterally seal said molds, each of said cones having a smooth outer surface and each of said molds having a plurality of axial grooves for receiving heated plastic therein;
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- (d) a plastic delivery channel formed in said first mold plate in communication with said source and in communication with each mold recess thereon and a sealing strip removably inserted in said plastic delivery channel to separate said mold recesses from the plastic delivery channel and sealing said channel along the length thereof, said strip having a plurality of apertures, each aperture thereof aligned with the mold recess, with each aperture providing communication between said plastic delivery channel and said recess.
Apparatus as defined in clam 12 further comprising a mounting bar for supporting said plurality of cones, said mounting bar aligned with said mold plates and having a plurality of spindles aligned with said molds, each spindle of said plurality of spindles slidably supporting thereon one cone of said plurality of cones and supports thereon means for urging said cone toward said mold plates.
Dependencies are inferred from the claim text.