Patents Assigned to J&C CO., LTD.
  • Patent number: 9890824
    Abstract: A method for manufacturing a monoblock-type caliper housing includes: preparing a middle core mold provided with a first and second core-forming portion and a first, second, and third channel; pouring molding sand into the first and second core-forming portions and the first, second, and third channels; heating the middle core mold to form a middle core; forming a salt coating layer on the surfaces of the first, second, and third channel-forming portions of the middle core; putting and heating the middle core in the middle core mold; putting the resultant middle core in a casting mold; pouring molten aluminum in a cavity between the middle core and the casting mold to form a caliper housing; applying ultrasonic waves to the caliper housing to remove the middle core; rinsing the caliper housing; and forming an oil supply hole in the caliper housing.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: February 13, 2018
    Assignee: J&C CO., LTD.
    Inventor: Cheol Kyu Jung