Method for molding dynamically balanced fans
First Claim
1. In the method of injection molding dynamically balanced plastic air movement devices wherein mold halves having complementary faces forming a mold cavity in the configuration of an air movement device are injected with plastic material to form an air movement device in the configuration of the mold cavity, the improvement comprisinginserting a plurality of selectively extendable plugs into one of the mold halves to form balancing pads of plastic material on the air movement device at predetermined positions to effect dynamic balancing thereof, andadjusting said selectively extendable plugs from the face of said mold half to vary the quantity of plastic material forming said balancing pads.
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Accused Products
Abstract
A method of manufacture of dynamically balanced molded plastic air movement devices wherein material may be readily added or deleted from inactive surface portions of the air movement devices during manufacture by adjustable pins accessable from the front or face of a mold half.
36 Citations
2 Claims
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1. In the method of injection molding dynamically balanced plastic air movement devices wherein mold halves having complementary faces forming a mold cavity in the configuration of an air movement device are injected with plastic material to form an air movement device in the configuration of the mold cavity, the improvement comprising
inserting a plurality of selectively extendable plugs into one of the mold halves to form balancing pads of plastic material on the air movement device at predetermined positions to effect dynamic balancing thereof, and adjusting said selectively extendable plugs from the face of said mold half to vary the quantity of plastic material forming said balancing pads.
Specification
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- Resources
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Current AssigneeTecair Incorporated
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Original AssigneeRichard E. Sr. Swin
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InventorsSwin, Richard E. Sr.
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Primary Examiner(s)Hoag, Willard E.
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Application NumberUS05/789,872Time in Patent Office480 DaysField of Search264/328, 264/329, 264/219, 249/140, 249/142, 249/151, 249/152, 249/155, 249/158, 249/102-104, 249/156, 425/117, 425/140, 425/542US Class Current264/275CPC Class CodesB29C 45/376 adjustable B29C45/374 takes...B29L 2031/087 PropellersF04D 29/325 for axial flow fans blade m...
