Resin injection apparatus and method of manufacturing core product
OwnerHirotoshi Mabuinventor
Life of this patent
Estimating the term…
Abstract
A resin injection apparatus includes: a mold die and a receiving die configured to hold a core body in an axial direction of the core body, the core body having a resin formation region serving as a region where resin is to be formed by injection of molten resin; a plurality of plungers; and a pot group attached to the mold die, the pot group including a plurality of pots proximately located next to each other in a direction. Each of the plurality of pots has a through hole in which a corresponding plunger of the plungers is insertable. The plurality of pots have a first coefficient of thermal expansion that is lower than a second coefficient of thermal expansion of the mold die.
Claims20
A method of manufacturing a core product comprising:
- holding a core body with a mold die and a receiving die in an axial direction of the core body, the core body having a resin formation region that houses injected molten resin;
- pushing out the molten resin in each of a plurality of pots attached to the mold die toward the core body with a plunger, while the core body is held by the mold die and the receiving die, wherein the plurality of pots are arranged adjacent to each other in a direction of alignment to form a pot group, wherein at least some of the plurality of pots are in contact with each other, and wherein the plurality of pots have a first coefficient of thermal expansion lower than a second coefficient of thermal expansion of the mold die;
- and
- curing the molten resin pushed out by the plunger and injected into the resin formation region.
A method of manufacturing a core product comprising:
- holding a core body with a mold die and a receiving die in an axial direction of the core body, the core body having a resin formation region that houses injected molten resin;
- pushing out the molten resin in each of a plurality of pots attached to the mold die toward the core body with a plunger, while the core body is held by the mold die and the receiving die, wherein the plurality of pots are annularly arranged adjacent to each other in a direction of alignment to firm a pot group, wherein a diameter of the pot group corresponding to an outer surface of the plurality of pots opposed to the core body is larger than a maximum outer diameter of the core body, and wherein the plurality of pots have a first coefficient of thermal expansion lower than a second coefficient of thermal expansion of the mold die;
- and
- curing the molten resin pushed out by the plunger and injected into the resin formation region.
Dependencies are inferred from the claim text.