US 12,257,749 B2
Injection unit with telescopic melt coupling
Arash Rostamimouri, Newmarket (CA); Alex Teng, Richmond Hill (CA); and Harshan Pugazhenthy, Brampton (CA)
Assigned to Husky Injection Molding Systems Ltd., Bolton (CA)
Appl. No. 18/245,375
Filed by HUSKY INJECTION MOLDING SYSTEMS LTD., Bolton (CA)
PCT Filed Aug. 27, 2021, PCT No. PCT/CA2021/051190
§ 371(c)(1), (2) Date Mar. 15, 2023,
PCT Pub. No. WO2022/056618, PCT Pub. Date Mar. 24, 2022.
Claims priority of provisional application 63/079,540, filed on Sep. 17, 2020.
Prior Publication US 2023/0286196 A1, Sep. 14, 2023
Int. Cl. B29C 45/20 (2006.01); B29C 45/17 (2006.01)
CPC B29C 45/1773 (2013.01) [B29C 45/20 (2013.01); B29C 2045/202 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An injection unit for an injection molding machine having a hot runner with a sprue, the injection unit comprising:
a heated melt pipe configured to convey a continuous stream of melt;
a shooting pot assembly including at least one shooting pot, the shooting pot assembly configured to convert the continuous stream of melt from the heated melt pipe into batches for cyclical injection; and
a telescopic melt coupling configured to convey melt from the heated melt pipe to the shooting pot assembly;
wherein the telescopic melt coupling comprises:
a spigot; and
a sleeve slidable about the spigot between an extended position and a collapsed position while maintaining a seal with the spigot to substantially contain melt.