| US 7,513,191 B2 | ||
| Piston head for hydraulic injection molding machine | ||
| Jeong-Ho Kim, Gyeonggi-do (Korea, Republic of); Joon-Keun Lee, Seoul (Korea, Republic of); and Young-Ju Kang, Seoul (Korea, Republic of) | ||
| Assigned to LS Mtron Ltd., Anyang (Korea, Republic of) | ||
| Filed on Jan. 08, 2007, as Appl. No. 11/651,373. | ||
| Claims priority of application No. 10-2006-0002616 (KR), filed on Jan. 10, 2006. | ||
| Prior Publication US 2007/0175325 A1, Aug. 02, 2007 | ||
| Int. Cl. F16J 1/12 (2006.01) | ||
| U.S. Cl. 92—179 [92/255] | 3 Claims |
| 1. A piston head of a hydraulic injection molding machine, which is screwed with a tie rod inside a hydraulic cylinder of
the hydraulic injection molding machine,
wherein the piston head has a second screw formed in an inner circumference of a hollow of the piston head and engaged with
a first screw formed in an outer circumference of the tie rod, and an insert groove having a predetermined shape is formed
in the inner circumference of the piston head in front of the second screw,
wherein the insert groove is formed in a circumferential direction of the inner circumference, and
wherein the insert groove is formed between the second screw and an oil sealing unit that prevents inflow of oil.
|