US 12,337,517 B2
Mold opening/closing device and method for controlling mold opening/closing device
Yasuhiro Hidaka, Nagano (JP)
Assigned to NISSEI ASB MACHINE CO., LTD., Nagano (JP)
Appl. No. 17/921,565
Filed by NISSEI ASB MACHINE CO., LTD., Nagano (JP)
PCT Filed Apr. 26, 2021, PCT No. PCT/JP2021/016680
§ 371(c)(1), (2) Date Jan. 27, 2023,
PCT Pub. No. WO2021/221022, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 2020-078455 (JP), filed on Apr. 27, 2020.
Prior Publication US 2023/0166439 A1, Jun. 1, 2023
Int. Cl. B29C 45/82 (2006.01); B29C 45/67 (2006.01); B29C 49/42 (2006.01); B29C 49/56 (2006.01)
CPC B29C 45/82 (2013.01) [B29C 45/67 (2013.01); B29C 49/42 (2013.01); B29C 49/5605 (2022.05); B29C 49/561 (2022.05); B29C 2945/76598 (2013.01); B29C 2945/76732 (2013.01); B29C 2945/76866 (2013.01); B29C 2945/76872 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A control method for a mold opening/closing device, the mold opening/closing device including:
a hydraulic cylinder that opens and closes a mold;
a hydraulic drive device that drives the hydraulic cylinder by supplying a hydraulic oil; and
a controller that controls the hydraulic drive device,
wherein the controller changes speed change in a deceleration region, in which movement of the hydraulic cylinder is decelerated, between a first half portion and a second half portion of the deceleration region,
in the control in the deceleration region when the mold is closed, the speed is changed nonlinearly in the first half portion,
the controller causes speed change rate per unit time in the second half portion to be smaller than in the first half portion and controls the speed change in the second half portion to be closer to linear than the speed change in the first half portion, and
the speed change in the second half portion is non-zero.