Self-contained molding apparatus and method for clamping the mold unit of an injection mold apparatus
OwnerSiebolt Hettingainventor
Life of this patent
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Abstract
A method and apparatus for clamping a plastic injection mold. The apparatus utilizes leader pins connected directly to a pair of mold sections. By directly connecting the leader pins to the mold sections, standard platens and housings can be eliminated, thereby reducing the overall weight and dimensions of the apparatus. An ejection assembly and runner assembly are bolted onto the mold sections, but are not subjected to clamping pressures during the molding process. Since these assemblies are not subject to clamping pressures, the standard housings usually provided on these assemblies may also be eliminated.
Claims34
A plastic injection molding apparatus for molding a plastic article, comprising:
- (a) leader pins;
- (b) a first mold section directly secured to said leader pins;
- (c) a second mold section directly coupled to said leader pins, said second mold section forming a parting line and a mold cavity with said first mold section when moved into sealed engagement with said first mold section;
- and
- (d) a pressure actuator capable of applying sufficient pressure to said second mold section to clamp said second mold section into sealed engagement with said first mold section, wherein said pressure actuator is slidable into a position proximate to said second mold section.
A plastic injection molding apparatus for molding a plastic article, comprising:
- (a) leader pins;
- (b) a one-piece first mold section directly secured to said leader pins in a manner which maintains said leader pins in a predetermined orientation relative to one another;
- (c) a pressure transfer plate secured to said leader pins, said pressure transfer plate being provided with an aperture;
- (d) a one-piece second mold section directly and slidably coupled to said leader pins, said second mold section forming a parting line and a mold cavity with said first mold section when moved into sealed engagement with said first mold section;
- (e) a pressure arm secured to said second mold section, said pressure arm being of a diameter sufficient to allow said pressure arm to pass through said aperture provided in said pressure transfer plate;
- (f) a track secured to said pressure transfer plate;
- (g) a pressure actuator slidably coupled to said track, said pressure actuator having a dimension sufficiently narrow to allow said pressure actuator to slide into a position between said pressure arm and said pressure transfer plate, wherein said pressure actuator covers said aperture provided in said pressure transfer plate.
A plastic injection molding apparatus for molding a plastic article, said plastic injection molding apparatus comprising:
- (a) a first mold section;
- (b) a plate having an aperture therein;
- (c) a second mold section between said first mold section and said plate, wherein said second mold section is engageable with and retractable from said first mold section;
- (d) a pressure arm on said second mold section;
- and
- (e) a cylinder assembly slidable from a first position between said plate and said second mold section to a second position, wherein said cylinder assembly is capable of supplying sufficient pressure to said pressure arm to clamp said second mold section into sealed engagement with said first mold section when said cylinder assembly is in said first position, and wherein said pressure arm is receivable in said aperture of said plate when said cylinder assembly is in said second position and when said second mold section is retracted from said first mold section.
A plastic injection molding apparatus for molding a plastic article, comprising:
- (a) a first mold section;
- (b) a second mold section forming a mold cavity with said first mold section when moved into sealed engagement with said first mold section;
- and
- (c) a pressure actuator slidable into a position proximate to said second mold section, said pressure actuator capable of supplying sufficient pressure to said second mold section to clamp said second mold section into sealed engagement with said first mold section to form said mold cavity.
Dependencies are inferred from the claim text.