Die and method of manufacturing cast product

• US 7,686,066 B2
• Filed: 12/08/2008
• Issued: 03/30/2010
• Est. Priority Date: 01/31/2008
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Hirao, Hiroaki
• Primary Examiner(s): Kerns; Kevin P
• Application Number:
  US12/330,214
• Publication Number:
  US 20090194249A1
• Time in Patent Office: 477 Days
• Field of Search: 164/113, 164/284, 164/312, 164/133, 164/337, 164/137, 164/342
• US Class Current: 164/113
• CPC Class Codes: B22D 17/22 Dies manufacture, see the appropriate class, e.g. B23P15/24; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
• CPC Class Codes: B22D 17/2272 Sprue channels

Abstract

According to one embodiment, a die is provided with a stationary die and a movable die. When the movable die is combined with the stationary die, a biscuit section, a product section in which a product is to be cast, a main runner configured to guide a molten metal from the biscuit section toward the product section, a main gate provided between the main runner and the product section, a sub-runner diverging from the main runner and extending along a side edge part of the product section, and a sub-gate provided between the sub-runner and the product section are formed between the stationary die and the movable die. The sub-gate is connected to the side edge part in an end portion of the product section. The sub-runner extends beyond the product section in a direction in which the side edge part extends.

Claims

1. A die for die casting, comprising:

a stationary die; and

a movable die to be combined with the stationary die,

a plurality of elements are situated between the stationary die and the movable die when the movable die is combined with the stationary die, the plurality of the elements comprise

(i) a biscuit section configured to receive a molten metal from an injection apparatus of a casting machine,

(ii) a product section in which a product is to be case, the product section including a main edge part, and a side edge part extending from an end portion of the main edge part,

(iii) a main runner configured to guide the molten metal from the biscuit section toward the main edge part of the product section,

(iv) a main gate provided between the main edge part of the product section and having a thickness smaller than that of the main runner,

(v) a sub-runner diverging from the main runner and extending along the side edge part of the product section, and

(vi) a sub-gate provided between the sub-runner and the side edge part of the product section and having a thickness smaller than that of the sub-runner, wherein

the product section including a first end portion connecting with the main gate and a second end portion as an end portion of the product section opposite from the first end portion,

the sub-gate being connected to the side edge part in the second end portion of the product section,

the sub-runner extending beyond the product section in a direction in which the side edge part extends,

a part of the sub-runner extending beyond the product section being unitized as a liner replaceable with another liner which forms a sub-runner of a different shape.

2. A method of manufacturing a cast product by die casting, comprising:

preparing a die which includes a stationary die and a movable die to be combined with the stationary die, the die being configured so that

(i) a biscuit section configured to receive a molten metal from an injection apparatus of a casting machine,

(ii) a product section in which a product is to be cast, the product section including a main edge part, and a side edge part extending from an end portion of the main edge part,

(iii) a main runner configured to guide the molten metal from the biscuit section toward the main edge part of the product section,

(iv) a main gate provided between the main runner and the main edge part of the product section and having a thickness smaller than that of the main runner,

(v) a sub-runner diverging from the main runner and extending along the side edge part of the product section, and

(vi) a sub-gate provided between the sub-runner and the side edge part of the product section and having a thickness smaller than that of the sub-runner

are formed between the stationary die and the movable die when the movable die is combined with the stationary die, wherein

the product section including a first end portion connecting with the main gate and a second end portion as an end portion of the product section opposite from the first end portion,

the sub-gate being connected to the side edge part in the second end portion of the product section,

the sub-runner extending beyond the product section in a direction in which the side edge part extends,

a part of the sub-runner extending beyond the product section being unitized as a liner replaceable with another liner which forms a sub-runner of a different shape;

combining the movable die with the stationary die; and

infusing the molten metal into the biscuit section.