US 12,134,220 B2
Injection molding machine and method of controlling the same
Ryuichi Katsumata, Numazu (JP); Yohei Yamazaki, Numazu (JP); and Kotaro Maruoka, Numazu (JP)
Assigned to SHUBAURA MACHINE CO., LTD., Tokyo-to (JP)
Appl. No. 17/624,521
Filed by SHIBAURA MACHINE CO., LTD., Tokyo-to (JP)
PCT Filed Dec. 16, 2019, PCT No. PCT/JP2019/049247
§ 371(c)(1), (2) Date Jan. 3, 2022,
PCT Pub. No. WO2021/002038, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 2019-125437 (JP), filed on Jul. 4, 2019.
Prior Publication US 2022/0242022 A1, Aug. 4, 2022
Int. Cl. B29C 45/76 (2006.01); B29C 45/04 (2006.01); B29C 45/26 (2006.01); B29C 45/77 (2006.01); B29C 45/80 (2006.01); G05B 19/4155 (2006.01)
CPC B29C 45/7653 (2013.01) [B29C 45/04 (2013.01); B29C 45/2602 (2013.01); B29C 45/77 (2013.01); B29C 45/80 (2013.01); G05B 19/4155 (2013.01); B29C 2945/76083 (2013.01); B29C 2945/76096 (2013.01); B29C 2945/76234 (2013.01); B29C 2945/76254 (2013.01); B29C 2945/76384 (2013.01); B29C 2945/76498 (2013.01); B29C 2945/76505 (2013.01); B29C 2945/76732 (2013.01); B29C 2945/76862 (2013.01); G05B 2219/45244 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An injection molding machine that molds a product for each execution of a molding cycle through an injecting process of injecting a material into clamped molds, a dwell process of controlling dwell pressure of the material in the molds, and a cooling process of cooling the material in the molds, the injection molding machine comprising:
a mold opening amount sensor configured to detect a mold opening amount of the molds; and
a controlling unit configured to control clamping force of the molds and the dwell pressure based on the mold opening amount during the molding cycle, wherein,
the molds include a first mold and a second mold facing each other;
the injection molding machine further includes:
a toggle mechanism including a toggle link and a toggle supporting board configured to move the first mold by bending or extension of the toggle link, the toggle link including a first end connected with the first mold and a second end connected with the toggle supporting board, the toggle supporting board supporting the toggle link, and
a mold thickness adjusting mechanism configured to adjust a distance between the toggle supporting board and the second mold;
the controlling unit is configured to update the clamping force by expansion and contraction of the toggle link in a non-lock-up state; and
the controlling unit is configured to adjust the distance so that, after update of the clamping force is stopped, the clamping force in a lock-up state of the toggle link becomes equal to the clamping force at update stop.