US20230150017A1 - Method of manufacturing hollow product using draft angle - Google Patents
Method of manufacturing hollow product using draft angle Download PDFInfo
- Publication number
- US20230150017A1 US20230150017A1 US17/622,638 US202017622638A US2023150017A1 US 20230150017 A1 US20230150017 A1 US 20230150017A1 US 202017622638 A US202017622638 A US 202017622638A US 2023150017 A1 US2023150017 A1 US 2023150017A1
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- Prior art keywords
- core
- carrier
- clip
- hollow product
- hollow
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000007423 decrease Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 11
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/24—Accessories for locating and holding cores or inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
Definitions
- the present disclosure relates to a method of manufacturing a hollow product. More particularly, the present disclosure relates to a method of manufacturing a hollow product using a draft angle.
- FIG. 1 illustrates a related art hollow product 10 .
- the hollow product 10 may be made of a cast product including a hollow tube 15 .
- the hollow product 10 may be formed in a circular pipe shape.
- the hollow tube 15 may be formed to extend from a first side 16 disposed at an upper part of the hollow product 10 to the inside of the hollow product 10 .
- the hollow tube 15 inside the hollow product 10 may be formed to extend along the inside of an outer wall of the hollow product 10 .
- the hollow tube 15 inside the hollow product 10 may have a coil spring shape.
- the hollow tube 15 inside the hollow product 10 may be formed to extend to a second side 17 disposed at a lower part of the hollow product 10 .
- a longitudinal direction of the hollow tube 15 may be a direction in which the hollow tube 15 extends from the first side 16 to the second side 17 .
- the hollow tube 15 may be formed in the form of a circular pipe.
- FIG. 2 is a cross-sectional view illustrating the related art hollow product 10 and a core 20 .
- the core 20 may be disposed at the center of a mold (not shown).
- the core 20 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis.
- the core 20 may include a first upper surface 21 perpendicular to the center line CL, an outer surface 23 that is parallel to the center line CL and extends downward from a perimeter of the first upper surface 21 , and a second upper surface 22 that is perpendicular to the center line CL and extends from a lower end of the outer surface 23 in a direction away from the center line CL.
- a longitudinal direction of the outer surface 23 may be the up-down direction.
- the hollow tube 15 may be installed at a position spaced apart from the outer surface 23 of the core 20 .
- An inner surface of the mold may be disposed at a position spaced apart from an outer surface of the hollow tube 15 .
- the hollow product 10 may be molded by pouring a molten metal into the mold.
- the hollow product 10 may include an inner surface 13 formed to extend from the lower end of the outer surface 23 of the core 20 along the longitudinal direction of the outer surface 23 of the core 20 , an upper surface 11 formed to extend from an upper end of the inner surface 13 in the direction away from the center line CL, a lower surface 12 formed to extend from a lower end of the inner surface 13 in the direction away from the center line CL, and outer surface 14 connecting an outer perimeter of the upper surface 11 and an outer perimeter of the lower surface 12 .
- the hollow product 10 and the core 20 of FIG. 2 are configured such that the center line CL and the outer surface 23 of the core 20 are parallel to each other and the inner surface 13 of the hollow product 10 is in direct contact with the outer surface 23 of the core 20 , a sufficient draft angle for taking the core 20 out of the hollow product 10 is not formed. In this case, there is a problem in that it is difficult to remove the core 20 from the hollow product 10 .
- An object of the present disclosure is to address the above-described and other problems.
- Another object of the present disclosure is to provide a core having a draft angle.
- Another object of the present disclosure is to provide a method of manufacturing a hollow product using a core having a draft angle.
- Another object of the present disclosure is to provide a carrier having a draft angle.
- Another object of the present disclosure is to provide a method of manufacturing a hollow product using a carrier having a draft angle.
- Another object of the present disclosure is to provide a clip having a draft angle.
- Another object of the present disclosure is to provide a method of manufacturing a hollow product using a clip having a draft angle.
- a method of manufacturing a hollow product using a core having a draft angle wherein the core is formed to protrude in one direction and has an outer surface at a perimeter of a protruding portion of the core, the outer surface of the core forms a slope with respect to the one direction, and a cross-sectional area of the core decreases as the core goes toward a protruding direction
- the method comprising disposing a mold to be spaced apart from the outer surface of the core, disposing a hollow tube between the core and the mold, injecting a molten metal into a space between the core and the mold, and removing the core when the molten metal is solidified and the hollow product is molded.
- the present disclosure can provide a core that is easily separated from a hollow product due to a draft angle of the core.
- the present disclosure can provide a carrier that is easily separated from a core due to a draft angle of the carrier.
- the present disclosure can provide a clip that is easily separated from a hollow product due to a draft angle of the clip.
- FIG. 1 illustrates a related art hollow product 10 .
- FIG. 2 is a cross-sectional view illustrating a related art hollow product 10 and a core 20 .
- FIG. 3 is an exploded cross-sectional view illustrating a core 120 and a carrier 130 according to an embodiment of the present disclosure.
- FIG. 4 is a cross-sectional view illustrating the core 120 and the carrier 130 of FIG. 3 and a hollow product 110 molded using them.
- FIG. 5 is a cross-sectional view illustrating a core 220 and a hollow product 210 molded using the same according to another embodiment of the present disclosure.
- FIG. 6 is an exploded cross-sectional view illustrating a core 320 , a clip 340 , and a hollow tube 315 installed in the clip 340 according to another embodiment of the present disclosure.
- FIG. 7 is a plan view illustrating the core 320 , the clip 340 , and the hollow tube 315 of FIG. 6 .
- FIG. 8 is a cross-sectional view illustrating the core 320 , the clip 340 , and the hollow tube 315 of FIG. 6 and a hollow product 310 molded using core 220 .
- FIG. 9 is a plan view illustrating the core 320 , the clip 340 , the hollow tube 315 , and the hollow product 310 of FIG. 8 .
- a singular expression can include a plural expression as long as it does not have an apparently different meaning in context.
- a specific order of processes may be performed differently from the order described. For example, two consecutively described processes may be performed substantially at the same time, or performed in the order opposite to the described order.
- FIG. 3 is an exploded cross-sectional view illustrating a core 120 and a carrier 130 according to an embodiment of the present disclosure.
- the core 120 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis.
- the core 120 may have a shape in which a portion is formed to protrude upward.
- the core 120 may include an outer surface 123 formed around the protruding portion, a first upper surface 121 formed at an upper end of the outer surface 123 , and a second upper surface 122 formed at a lower end of the outer surface 123 .
- the core 120 may include the first upper surface 121 perpendicular to the center line CL.
- the core 120 may include the outer surface 123 extending downward from a perimeter of the first upper surface 121 .
- the outer surface 123 may be formed to move away from the center line CL as it goes toward the lower side.
- the core 120 may include the second upper surface 122 that is perpendicular to the center line CL and extends from the lower end of the outer surface 123 in a direction away from the center line CL.
- the outer surface 123 of the core 120 may have a slope with respect to the center line CL.
- An angle forming the slope may be referred to as a first angle ⁇ 1 .
- the first angle ⁇ 1 may be formed such that a cross-sectional area of the core 120 decreases as the core 120 goes toward the upper side.
- the first angle ⁇ 1 may be referred to as a draft angle.
- the carrier 130 may have a form in which the center line CL extending in the up-down direction is used as a rotation axis.
- the carrier 130 may include an upper surface 131 that is perpendicular to the center line CL and extends from a position spaced apart from the center line CL in the direction away from the center line CL.
- the carrier 130 may include an outer surface 134 that is parallel to the center line CL and extends downward from an outer perimeter of the upper surface 131 .
- a longitudinal direction of the outer surface 134 may be the up-down direction.
- the carrier 130 may include a lower surface 132 that extends from a lower end of the outer surface 134 in a direction approaching to the center line CL.
- the carrier 130 may include an inner surface 133 that connects an inner perimeter of the upper surface 131 and an inner perimeter of the lower surface 132 . That is, a core insertion hole 135 may be formed inside the carrier 130 . A diameter of a lower end of the core insertion hole 135 may be equal to a diameter of a lower end of the outer surface 123 of the core 120 .
- an angle between the inner surface 133 and the outer surface 134 of the carrier 130 may be referred to as a second angle ⁇ 2 .
- the second angle ⁇ 2 may be equal to the first angle ⁇ 1 .
- the second angle ⁇ 2 may be referred to as a draft angle. That is, when the carrier 130 is fitted to the core 120 , the inner surface 133 of the carrier 130 and the outer surface 123 of the core 120 may be in close contact with each other. Hence, a molten metal can be prevented from penetrating between the core 120 and the carrier 130 .
- the carrier 130 may be manufactured by forming a hollow in a cylindrical extruded material and machining the inner surface 133 of the hollow.
- the carrier 130 may be manufactured by rolling a flat plate material having the inner surface 133 and the outer surface 134 into a circular shape.
- a slope of the inner surface 133 of the carrier 130 may be formed to be same as a slope of the outer surface 123 of the core 120 , and a slope of the outer surface 134 of the carrier 130 may be formed to be parallel to the center line CL.
- a material of the carrier 130 may be a metal or a non-ferrous metal.
- FIG. 4 is a cross-sectional view illustrating the core 120 and the carrier 130 , and a hollow product 110 molded using them.
- a mold may be disposed to be spaced apart from the outer surface 134 of the carrier 130 .
- a hollow tube 115 may be disposed between the outer surface 134 of the carrier 130 and the mold. The molten metal may be injected into a remaining space between the outer surface 134 of the carrier 130 and the mold. When the molten metal is solidified, the hollow product 110 including the hollow tube 115 may be molded.
- the hollow product 110 may include an inner surface 113 that extends from a lower end of the outer surface 134 of the carrier 130 along the longitudinal direction of the outer surface 134 of the carrier 130 .
- the hollow product 110 may include an upper surface 111 that extends from an upper end of the inner surface 113 in the direction away from the center line CL.
- the hollow product 110 may include a lower surface 112 that extends from a lower end of the inner surface 113 in the direction away from the center line CL.
- the hollow product 110 may include an outer surface 114 that connects an outer perimeter of the upper surface 111 and an outer perimeter of the lower surface 112 .
- the core 120 can be easily taken out of the carrier 130 .
- the hollow product 110 including the carrier 130 can be formed.
- the carrier 130 can be easily removed from the hollow product 110 .
- the carrier 130 may be elastically deformed since the core insertion hole 135 of the carrier 130 becomes empty. Hence, the carrier 130 can be easily taken out of the hollow product 110 .
- FIG. 5 is a cross-sectional view illustrating a core 220 and a hollow product 210 molded using the same according to another embodiment of the present disclosure.
- the core 220 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis.
- the core 220 may have a shape in which a portion is formed to protrude upward.
- the core 220 may include an outer surface 223 formed around the protruding portion, a first upper surface 221 formed at an upper end of the outer surface 223 , and a second upper surface 222 formed at a lower end of the outer surface 223 .
- the core 220 may include the first upper surface 221 perpendicular to the center line CL.
- the core 220 may include the outer surface 223 extending downward from a perimeter of the first upper surface 221 .
- the outer surface 223 may be formed to move away from the center line CL as it goes toward the lower side.
- the core 220 may include the second upper surface 222 that is perpendicular to the center line CL and extends from the lower end of the outer surface 223 in a direction away from the center line CL.
- the outer surface 223 of the core 220 may have a slope with respect to the center line CL.
- An angle forming the slope may be referred to as a third angle ⁇ 3 .
- the third angle ⁇ 3 may be formed such that a cross-sectional area of the core 220 decreases as the core 220 goes toward the upper side.
- the third angle ⁇ 3 may be referred to as a draft angle.
- a longitudinal direction of the outer surface 223 may be a direction that is inclined with respect to the center line CL by the third angle ⁇ 3 in the up-down direction.
- a mold may be disposed to be spaced apart from the outer surface 223 of the core 220 .
- a hollow tube 215 may be disposed between the outer surface 223 of the core 220 and the mold.
- a molten metal may be injected into a remaining space between the outer surface 223 of the core 220 and the mold. When the molten metal is solidified, the hollow product 210 including the hollow tube 215 may be molded.
- the hollow product 210 may include an inner surface 213 that extends from a lower end of the outer surface 223 of the core 220 along the longitudinal direction of the outer surface 223 of the core 220 . That is, an angle between the inner surface 213 and the center line CL may be the same as the third angle ⁇ 3 .
- the hollow product 210 may include an upper surface 211 that extends from an upper end of the inner surface 213 in the direction away from the center line CL.
- the hollow product 210 may include a lower surface 212 that extends from a lower end of the inner surface 213 in the direction away from the center line CL.
- the hollow product 210 may include an outer surface 214 that connects an outer perimeter of the upper surface 211 and an outer perimeter of the lower surface 212 .
- the core 120 can be easily taken out of the hollow product 210 .
- FIG. 6 is an exploded cross-sectional view illustrating a core 320 , a clip 340 , and a hollow tube 315 installed in the clip 340 according to another embodiment of the present disclosure.
- FIG. 7 is a plan view illustrating the core 320 , the clip 340 , and the hollow tube 315 .
- the core 320 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis.
- the core 320 may have a shape in which a portion is formed to protrude upward.
- the core 320 may include an outer surface 323 formed around the protruding portion, a first upper surface 321 formed at an upper end of the outer surface 323 , and a second upper surface 322 formed at a lower end of the outer surface 323 .
- the core 320 may include the first upper surface 321 perpendicular to the center line CL.
- the core 320 may include the outer surface 323 extending downward from a perimeter of the first upper surface 321 .
- the outer surface 323 may be formed to move away from the center line CL as it goes toward the lower side.
- the core 320 may include the second upper surface 322 that is perpendicular to the center line CL and extends from the lower end of the outer surface 323 in a direction away from the center line CL.
- the outer surface 323 of the core 320 may have a slope with respect to the center line CL.
- An angle forming the slope may be referred to as a fourth angle ⁇ 4 .
- the fourth angle ⁇ 4 may be formed such that a cross-sectional area of the core 320 decreases as the core 320 goes toward the upper side.
- the fourth angle ⁇ 4 may be referred to as a draft angle.
- the clip 340 may have a form in which the center line CL extending in the up-down direction is used as a rotation axis. As illustrated in FIG. 7 , the clip 340 may be formed only in a partial area using the center line CL as the rotation axis. The clip 340 may be formed on the left side and the right side of the core 320 .
- the clip 340 may include an upper surface 341 that is perpendicular to the center line CL and extends from a position spaced apart from the center line CL in the direction away from the center line CL.
- the clip 340 may include an outer surface 344 that is parallel to the center line CL and extends downward from an outer perimeter of the upper surface 341 .
- a longitudinal direction of the outer surface 344 may be the up-down direction.
- the clip 340 may include a lower surface 342 that extends from a lower end of the outer surface 344 in a direction approaching to the center line CL.
- the clip 340 may include an inner surface 343 that connects an inner perimeter of the upper surface 341 and an inner perimeter of the lower surface 342 .
- the hollow tube 315 may be fixed to the outer surface 344 of the clip 340 .
- an angle between the inner surface 343 and the outer surface 344 of the clip 340 may be referred to as a fifth angle ⁇ 5 .
- the fifth angle ⁇ 5 may be equal to the fourth angle ⁇ 4 .
- the fifth angle ⁇ 5 may be referred to as a draft angle. That is, when the clip 340 is installed in the core 320 , the inner surface 343 of the clip 340 and the outer surface 323 of the core 320 may be in close contact with each other. Hence, a molten metal can be prevented from penetrating between the core 320 and the clip 340 .
- FIG. 8 is a cross-sectional view illustrating the core 320 , the clip 340 , and the hollow tube 315 , and a hollow product 310 molded using them.
- FIG. 9 is a plan view illustrating the core 320 , the clip 340 , the hollow tube 315 , and the hollow product 310 .
- the hollow tube 315 may be fixed to the outer surface 344 of the clip 340 .
- the mold may be disposed to be spaced apart from an outer surface of the hollow tube 315 , the outer surface 344 of the clip 340 , and the outer surface 323 of the core 320 .
- the molten metal may be injected into a remaining space between the outer surface 323 of the core 320 and the mold.
- the hollow product 210 including the clip 340 and the hollow tube 315 may be molded.
- a height of the hollow product 310 may be the same as a height of the clip 340 .
- the height of the hollow product 310 may be greater than the height of the clip 340 .
- the hollow product 310 may be formed so that the fixed hollow tube 315 of the clip 340 is covered.
- the hollow product 310 formed in a portion not having the clip 340 may have the same shape as the hollow product 210 described above.
- a material of the clip 340 may be a metal or a non-ferrous metal.
- the material of the clip 340 may be the same as a material of the molten metal. That is, the material of the clip 340 may be the same as a material of the hollow product 310 .
- FIG. 9 illustrates distinguishably a boundary between the hollow product 310 and the clip 340 for convenience of explanation. However, after going through a high-pressure casting process using the molten metal, an external surface of the clip 340 may be melted in the molten metal, and the boundary between the clip 340 and the hollow product 310 may disappear.
- the core 320 can be easily taken out of the clip 340 . Since the outer surface 323 of the core 320 and an inner surface (not shown) of the hollow product 310 each have the draft angle ⁇ 4 , the core 320 can be easily taken out of the hollow product 310 .
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Abstract
A method of manufacturing a hollow product using a draft angle is disclosed. A method of manufacturing a hollow product using a draft angle refers to a method of manufacturing a hollow product using a core having a draft angle. The core is formed to protrude in one direction and has an outer surface at a perimeter of a protruding portion of the core, the outer surface of the core forms a slope with respect to the one direction, and a cross-sectional area of the core decreases as the core goes toward a protruding direction. The method comprises disposing a mold to be spaced apart from the outer surface of the core, disposing a hollow tube between the core and the mold, injecting a molten metal into a space between the core and the mold, and removing the core when the molten metal is solidified and the hollow product is molded.
Description
- The present disclosure relates to a method of manufacturing a hollow product. More particularly, the present disclosure relates to a method of manufacturing a hollow product using a draft angle.
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FIG. 1 illustrates a related arthollow product 10. Thehollow product 10 may be made of a cast product including ahollow tube 15. Thehollow product 10 may be formed in a circular pipe shape. Thehollow tube 15 may be formed to extend from afirst side 16 disposed at an upper part of thehollow product 10 to the inside of thehollow product 10. Thehollow tube 15 inside thehollow product 10 may be formed to extend along the inside of an outer wall of thehollow product 10. Thehollow tube 15 inside thehollow product 10 may have a coil spring shape. Thehollow tube 15 inside thehollow product 10 may be formed to extend to asecond side 17 disposed at a lower part of thehollow product 10. A longitudinal direction of thehollow tube 15 may be a direction in which thehollow tube 15 extends from thefirst side 16 to thesecond side 17. Thehollow tube 15 may be formed in the form of a circular pipe. -
FIG. 2 is a cross-sectional view illustrating the related arthollow product 10 and acore 20. In order to make thehollow product 10 of the circular pipe shape, thecore 20 may be disposed at the center of a mold (not shown). Thecore 20 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis. Thecore 20 may include a firstupper surface 21 perpendicular to the center line CL, anouter surface 23 that is parallel to the center line CL and extends downward from a perimeter of the firstupper surface 21, and a secondupper surface 22 that is perpendicular to the center line CL and extends from a lower end of theouter surface 23 in a direction away from the center line CL. A longitudinal direction of theouter surface 23 may be the up-down direction. - Thereafter, the
hollow tube 15 may be installed at a position spaced apart from theouter surface 23 of thecore 20. An inner surface of the mold may be disposed at a position spaced apart from an outer surface of thehollow tube 15. Thehollow product 10 may be molded by pouring a molten metal into the mold. Thehollow product 10 may include aninner surface 13 formed to extend from the lower end of theouter surface 23 of thecore 20 along the longitudinal direction of theouter surface 23 of thecore 20, an upper surface 11 formed to extend from an upper end of theinner surface 13 in the direction away from the center line CL, alower surface 12 formed to extend from a lower end of theinner surface 13 in the direction away from the center line CL, andouter surface 14 connecting an outer perimeter of the upper surface 11 and an outer perimeter of thelower surface 12. - In order to obtain the finished
hollow product 10, it is necessary to remove thecore 20 disposed inside thehollow product 10. However, since thehollow product 10 and thecore 20 ofFIG. 2 are configured such that the center line CL and theouter surface 23 of thecore 20 are parallel to each other and theinner surface 13 of thehollow product 10 is in direct contact with theouter surface 23 of thecore 20, a sufficient draft angle for taking thecore 20 out of thehollow product 10 is not formed. In this case, there is a problem in that it is difficult to remove thecore 20 from thehollow product 10. - [Patent Document 1] Korean Patent No. 10-1761677
- An object of the present disclosure is to address the above-described and other problems.
- Another object of the present disclosure is to provide a core having a draft angle.
- Another object of the present disclosure is to provide a method of manufacturing a hollow product using a core having a draft angle.
- Another object of the present disclosure is to provide a carrier having a draft angle.
- Another object of the present disclosure is to provide a method of manufacturing a hollow product using a carrier having a draft angle.
- Another object of the present disclosure is to provide a clip having a draft angle.
- Another object of the present disclosure is to provide a method of manufacturing a hollow product using a clip having a draft angle.
- In order to achieve the above-described and other objects, in one aspect of the present disclosure, there is provided a method of manufacturing a hollow product using a core having a draft angle, wherein the core is formed to protrude in one direction and has an outer surface at a perimeter of a protruding portion of the core, the outer surface of the core forms a slope with respect to the one direction, and a cross-sectional area of the core decreases as the core goes toward a protruding direction, the method comprising disposing a mold to be spaced apart from the outer surface of the core, disposing a hollow tube between the core and the mold, injecting a molten metal into a space between the core and the mold, and removing the core when the molten metal is solidified and the hollow product is molded.
- Effects of a method of manufacturing a hollow product using a draft angle according to the present disclosure are described as follows.
- According to at least one embodiment of the present disclosure, the present disclosure can provide a core that is easily separated from a hollow product due to a draft angle of the core.
- According to at least one embodiment of the present disclosure, the present disclosure can provide a carrier that is easily separated from a core due to a draft angle of the carrier.
- According to at least one embodiment of the present disclosure, the present disclosure can provide a clip that is easily separated from a hollow product due to a draft angle of the clip.
- Additional scope of applicability of the present disclosure will become apparent from the detailed description given blow. However, it should be understood that the detailed description and specific examples such as embodiments of the present disclosure are given merely by way of example, since various changes and modifications within the spirit and scope of the present disclosure will become apparent to those skilled in the art from the detailed description.
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FIG. 1 illustrates a related arthollow product 10. -
FIG. 2 is a cross-sectional view illustrating a related arthollow product 10 and acore 20. -
FIG. 3 is an exploded cross-sectional view illustrating acore 120 and acarrier 130 according to an embodiment of the present disclosure. -
FIG. 4 is a cross-sectional view illustrating thecore 120 and thecarrier 130 ofFIG. 3 and ahollow product 110 molded using them. -
FIG. 5 is a cross-sectional view illustrating acore 220 and ahollow product 210 molded using the same according to another embodiment of the present disclosure. -
FIG. 6 is an exploded cross-sectional view illustrating acore 320, aclip 340, and ahollow tube 315 installed in theclip 340 according to another embodiment of the present disclosure. -
FIG. 7 is a plan view illustrating thecore 320, theclip 340, and thehollow tube 315 ofFIG. 6 . -
FIG. 8 is a cross-sectional view illustrating thecore 320, theclip 340, and thehollow tube 315 ofFIG. 6 and ahollow product 310 molded usingcore 220. -
FIG. 9 is a plan view illustrating thecore 320, theclip 340, thehollow tube 315, and thehollow product 310 ofFIG. 8 . - Reference will now be made in detail to embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. In general, a suffix such as “module” and “unit” may be used to refer to elements or components. Use of such a suffix herein is merely intended to facilitate description of the present disclosure, and the suffix itself is not intended to give any special meaning or function. It will be noted that a detailed description of known arts will be omitted if it is determined that the detailed description of the known arts can obscure the embodiments of the disclosure. The accompanying drawings are used to help easily understand various technical features and it should be understood that embodiments presented herein are not limited by the accompanying drawings. As such, the present disclosure should be construed to extend to any alterations, equivalents and substitutes in addition to those which are particularly set out in the accompanying drawings.
- The terms including an ordinal number such as first, second, etc. may be used to describe various components, but the components are not limited by such terms. The terms are used only for the purpose of distinguishing one component from other components.
- When any component is described as “being connected” or “being coupled” to other component, this should be understood to mean that another component may exist between them, although any component may be directly connected or coupled to the other component. In contrast, when any component is described as “being directly connected” or “being directly coupled” to other component, this should be understood to mean that no component exists between them.
- A singular expression can include a plural expression as long as it does not have an apparently different meaning in context.
- In the present disclosure, terms “include” and “have” should be understood to be intended to designate that illustrated features, numbers, steps, operations, components, parts or combinations thereof are present and not to preclude the existence of one or more different features, numbers, steps, operations, components, parts or combinations thereof, or the possibility of the addition thereof.
- In the drawings, sizes of the components may be exaggerated or reduced for convenience of explanation. For example, the size and the thickness of each component illustrated in the drawings are arbitrarily illustrated for convenience of explanation, and thus the present disclosure is not limited thereto unless specified as such.
- If any embodiment is implementable differently, a specific order of processes may be performed differently from the order described. For example, two consecutively described processes may be performed substantially at the same time, or performed in the order opposite to the described order.
-
FIG. 3 is an exploded cross-sectional view illustrating acore 120 and acarrier 130 according to an embodiment of the present disclosure. - The
core 120 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis. Thecore 120 may have a shape in which a portion is formed to protrude upward. Thecore 120 may include anouter surface 123 formed around the protruding portion, a firstupper surface 121 formed at an upper end of theouter surface 123, and a secondupper surface 122 formed at a lower end of theouter surface 123. - The
core 120 may include the firstupper surface 121 perpendicular to the center line CL. Thecore 120 may include theouter surface 123 extending downward from a perimeter of the firstupper surface 121. Theouter surface 123 may be formed to move away from the center line CL as it goes toward the lower side. Thecore 120 may include the secondupper surface 122 that is perpendicular to the center line CL and extends from the lower end of theouter surface 123 in a direction away from the center line CL. - As illustrated in
FIG. 3 , theouter surface 123 of thecore 120 may have a slope with respect to the center line CL. An angle forming the slope may be referred to as a first angle θ1. The first angle θ1 may be formed such that a cross-sectional area of the core 120 decreases as thecore 120 goes toward the upper side. The first angle θ1 may be referred to as a draft angle. - The
carrier 130 may have a form in which the center line CL extending in the up-down direction is used as a rotation axis. Thecarrier 130 may include anupper surface 131 that is perpendicular to the center line CL and extends from a position spaced apart from the center line CL in the direction away from the center line CL. Thecarrier 130 may include anouter surface 134 that is parallel to the center line CL and extends downward from an outer perimeter of theupper surface 131. A longitudinal direction of theouter surface 134 may be the up-down direction. Thecarrier 130 may include alower surface 132 that extends from a lower end of theouter surface 134 in a direction approaching to the center line CL. Thecarrier 130 may include aninner surface 133 that connects an inner perimeter of theupper surface 131 and an inner perimeter of thelower surface 132. That is, acore insertion hole 135 may be formed inside thecarrier 130. A diameter of a lower end of thecore insertion hole 135 may be equal to a diameter of a lower end of theouter surface 123 of thecore 120. - As illustrated in
FIG. 3 , an angle between theinner surface 133 and theouter surface 134 of thecarrier 130 may be referred to as a second angle θ2. The second angle θ2 may be equal to the first angle θ1. The second angle θ2 may be referred to as a draft angle. That is, when thecarrier 130 is fitted to thecore 120, theinner surface 133 of thecarrier 130 and theouter surface 123 of thecore 120 may be in close contact with each other. Hence, a molten metal can be prevented from penetrating between the core 120 and thecarrier 130. - The
carrier 130 may be manufactured by forming a hollow in a cylindrical extruded material and machining theinner surface 133 of the hollow. Thecarrier 130 may be manufactured by rolling a flat plate material having theinner surface 133 and theouter surface 134 into a circular shape. A slope of theinner surface 133 of thecarrier 130 may be formed to be same as a slope of theouter surface 123 of thecore 120, and a slope of theouter surface 134 of thecarrier 130 may be formed to be parallel to the center line CL. - A material of the
carrier 130 may be a metal or a non-ferrous metal. -
FIG. 4 is a cross-sectional view illustrating thecore 120 and thecarrier 130, and ahollow product 110 molded using them. A mold may be disposed to be spaced apart from theouter surface 134 of thecarrier 130. Ahollow tube 115 may be disposed between theouter surface 134 of thecarrier 130 and the mold. The molten metal may be injected into a remaining space between theouter surface 134 of thecarrier 130 and the mold. When the molten metal is solidified, thehollow product 110 including thehollow tube 115 may be molded. - The
hollow product 110 may include aninner surface 113 that extends from a lower end of theouter surface 134 of thecarrier 130 along the longitudinal direction of theouter surface 134 of thecarrier 130. Thehollow product 110 may include anupper surface 111 that extends from an upper end of theinner surface 113 in the direction away from the center line CL. Thehollow product 110 may include alower surface 112 that extends from a lower end of theinner surface 113 in the direction away from the center line CL. Thehollow product 110 may include anouter surface 114 that connects an outer perimeter of theupper surface 111 and an outer perimeter of thelower surface 112. - Referring to
FIGS. 3 and 4 , since the draft angles θ1 and θ2 are formed in theouter surface 123 of thecore 120 and theinner surface 133 of thecarrier 130, thecore 120 can be easily taken out of thecarrier 130. Hence, thehollow product 110 including thecarrier 130 can be formed. - Unlike the above description, the
carrier 130 can be easily removed from thehollow product 110. When thecore 120 is removed, thecarrier 130 may be elastically deformed since thecore insertion hole 135 of thecarrier 130 becomes empty. Hence, thecarrier 130 can be easily taken out of thehollow product 110. -
FIG. 5 is a cross-sectional view illustrating acore 220 and ahollow product 210 molded using the same according to another embodiment of the present disclosure. - The
core 220 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis. Thecore 220 may have a shape in which a portion is formed to protrude upward. Thecore 220 may include anouter surface 223 formed around the protruding portion, a firstupper surface 221 formed at an upper end of theouter surface 223, and a secondupper surface 222 formed at a lower end of theouter surface 223. - The
core 220 may include the firstupper surface 221 perpendicular to the center line CL. Thecore 220 may include theouter surface 223 extending downward from a perimeter of the firstupper surface 221. Theouter surface 223 may be formed to move away from the center line CL as it goes toward the lower side. Thecore 220 may include the secondupper surface 222 that is perpendicular to the center line CL and extends from the lower end of theouter surface 223 in a direction away from the center line CL. - As illustrated in
FIG. 5 , theouter surface 223 of thecore 220 may have a slope with respect to the center line CL. An angle forming the slope may be referred to as a third angle θ3. The third angle θ3 may be formed such that a cross-sectional area of the core 220 decreases as thecore 220 goes toward the upper side. The third angle θ3 may be referred to as a draft angle. A longitudinal direction of theouter surface 223 may be a direction that is inclined with respect to the center line CL by the third angle θ3 in the up-down direction. - A mold may be disposed to be spaced apart from the
outer surface 223 of thecore 220. Ahollow tube 215 may be disposed between theouter surface 223 of thecore 220 and the mold. A molten metal may be injected into a remaining space between theouter surface 223 of thecore 220 and the mold. When the molten metal is solidified, thehollow product 210 including thehollow tube 215 may be molded. - The
hollow product 210 may include aninner surface 213 that extends from a lower end of theouter surface 223 of thecore 220 along the longitudinal direction of theouter surface 223 of thecore 220. That is, an angle between theinner surface 213 and the center line CL may be the same as the third angle θ3. Thehollow product 210 may include anupper surface 211 that extends from an upper end of theinner surface 213 in the direction away from the center line CL. Thehollow product 210 may include alower surface 212 that extends from a lower end of theinner surface 213 in the direction away from the center line CL. Thehollow product 210 may include anouter surface 214 that connects an outer perimeter of theupper surface 211 and an outer perimeter of thelower surface 212. - Since the same draft angle θ3 is formed in the
outer surface 223 of thecore 220 and theinner surface 213 of thehollow product 210, thecore 120 can be easily taken out of thehollow product 210. -
FIG. 6 is an exploded cross-sectional view illustrating acore 320, aclip 340, and ahollow tube 315 installed in theclip 340 according to another embodiment of the present disclosure.FIG. 7 is a plan view illustrating thecore 320, theclip 340, and thehollow tube 315. - The
core 320 may have a form in which a center line CL extending in an up-down direction is used as a rotation axis. Thecore 320 may have a shape in which a portion is formed to protrude upward. Thecore 320 may include anouter surface 323 formed around the protruding portion, a firstupper surface 321 formed at an upper end of theouter surface 323, and a secondupper surface 322 formed at a lower end of theouter surface 323. - The
core 320 may include the firstupper surface 321 perpendicular to the center line CL. Thecore 320 may include theouter surface 323 extending downward from a perimeter of the firstupper surface 321. Theouter surface 323 may be formed to move away from the center line CL as it goes toward the lower side. Thecore 320 may include the secondupper surface 322 that is perpendicular to the center line CL and extends from the lower end of theouter surface 323 in a direction away from the center line CL. - As illustrated in
FIG. 6 , theouter surface 323 of thecore 320 may have a slope with respect to the center line CL. An angle forming the slope may be referred to as a fourth angle θ4. The fourth angle θ4 may be formed such that a cross-sectional area of the core 320 decreases as thecore 320 goes toward the upper side. The fourth angle θ4 may be referred to as a draft angle. - The
clip 340 may have a form in which the center line CL extending in the up-down direction is used as a rotation axis. As illustrated inFIG. 7 , theclip 340 may be formed only in a partial area using the center line CL as the rotation axis. Theclip 340 may be formed on the left side and the right side of thecore 320. - The
clip 340 may include anupper surface 341 that is perpendicular to the center line CL and extends from a position spaced apart from the center line CL in the direction away from the center line CL. Theclip 340 may include anouter surface 344 that is parallel to the center line CL and extends downward from an outer perimeter of theupper surface 341. A longitudinal direction of theouter surface 344 may be the up-down direction. Theclip 340 may include alower surface 342 that extends from a lower end of theouter surface 344 in a direction approaching to the center line CL. Theclip 340 may include aninner surface 343 that connects an inner perimeter of theupper surface 341 and an inner perimeter of thelower surface 342. Thehollow tube 315 may be fixed to theouter surface 344 of theclip 340. - As illustrated in
FIG. 6 , an angle between theinner surface 343 and theouter surface 344 of theclip 340 may be referred to as a fifth angle θ5. The fifth angle θ5 may be equal to the fourth angle θ4. The fifth angle θ5 may be referred to as a draft angle. That is, when theclip 340 is installed in thecore 320, theinner surface 343 of theclip 340 and theouter surface 323 of thecore 320 may be in close contact with each other. Hence, a molten metal can be prevented from penetrating between the core 320 and theclip 340. -
FIG. 8 is a cross-sectional view illustrating thecore 320, theclip 340, and thehollow tube 315, and ahollow product 310 molded using them.FIG. 9 is a plan view illustrating thecore 320, theclip 340, thehollow tube 315, and thehollow product 310. - The
hollow tube 315 may be fixed to theouter surface 344 of theclip 340. The mold may be disposed to be spaced apart from an outer surface of thehollow tube 315, theouter surface 344 of theclip 340, and theouter surface 323 of thecore 320. The molten metal may be injected into a remaining space between theouter surface 323 of thecore 320 and the mold. When the molten metal is solidified, thehollow product 210 including theclip 340 and thehollow tube 315 may be molded. - A height of the
hollow product 310 may be the same as a height of theclip 340. The height of thehollow product 310 may be greater than the height of theclip 340. Thehollow product 310 may be formed so that the fixedhollow tube 315 of theclip 340 is covered. Thehollow product 310 formed in a portion not having theclip 340 may have the same shape as thehollow product 210 described above. - A material of the
clip 340 may be a metal or a non-ferrous metal. The material of theclip 340 may be the same as a material of the molten metal. That is, the material of theclip 340 may be the same as a material of thehollow product 310.FIG. 9 illustrates distinguishably a boundary between thehollow product 310 and theclip 340 for convenience of explanation. However, after going through a high-pressure casting process using the molten metal, an external surface of theclip 340 may be melted in the molten metal, and the boundary between theclip 340 and thehollow product 310 may disappear. - Referring to
FIGS. 8 and 9 , since theouter surface 323 of thecore 320 and theinner surface 343 of theclip 340 have the draft angles θ4 and θ5, respectively, thecore 320 can be easily taken out of theclip 340. Since theouter surface 323 of thecore 320 and an inner surface (not shown) of thehollow product 310 each have the draft angle θ4, thecore 320 can be easily taken out of thehollow product 310. - Some embodiments or other embodiments of the present disclosure described above are not mutually exclusive or distinct from each other. Configurations or functions of some embodiments or other embodiments of the present disclosure described above can be used together or combined with each other.
- It is apparent to those skilled in the art that the present disclosure can be embodied in other specific forms without departing from the spirit and essential features of the present disclosure. Accordingly, the above detailed description should not be construed as limiting in all aspects and should be considered as illustrative. The scope of the present disclosure should be determined by rational interpretation of the appended claims, and all modifications within an equivalent scope of the present disclosure are included in the scope of the present disclosure.
Claims (8)
1. A method of manufacturing a hollow product using a core having a draft angle, wherein the core is formed to protrude in one direction and has an outer surface at a perimeter of a protruding portion of the core, the outer surface of the core forms a slope with respect to the one direction, and a cross-sectional area of the core decreases as the core goes toward a protruding direction, the method comprising:
disposing a mold to be spaced apart from the outer surface of the core;
disposing a hollow tube between the core and the mold;
injecting a molten metal into a space between the core and the mold; and
removing the core when the molten metal is solidified and the hollow product is molded.
2. The method of claim 1 , wherein a carrier is installed at a perimeter of the outer surface of the core,
wherein an inner surface of the carrier is in close contact with the outer surface of the core,
wherein an outer surface of the carrier is formed parallel to the one direction,
wherein in the disposing of the mold, the mold is disposed to be spaced apart from the outer surface of the carrier
wherein in the disposing of the hollow tube, the hollow tube is disposed between the carrier and the mold, and
wherein in the injecting of the molten metal, the molten metal is injected between the carrier and the mold.
3. The method of claim 2 , wherein the carrier is formed such that a hollow is formed inside a cylindrical extruded material, and an inner surface of the hollow is processed to be tapered.
4. The method of claim 2 , wherein that carrier is formed such that a plate, in which a slope of one surface is the same as a slope of the outer surface of the core and a slope of other surface is formed parallel to the one direction, is in close contact with the outer surface of the core.
5. The method of claim 5 , wherein a material of the carrier is a metal or a non-ferrous metal.
6. The method of claim 1 , wherein a clip is installed at a perimeter of the outer surface of the core,
wherein an inner surface of the clip is in close contact with the outer surface of the core,
wherein an outer surface of the clip is formed parallel to the one direction, and
wherein the hollow tube is fixed to the outer surface of the clip.
7. The method of claim 6 , wherein a material of the clip is a metal or a non-ferrous metal.
8. The method of claim 5 , wherein the clip is formed only on a portion of the perimeter of the outer surface of the core.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR10-2020-0186554 | 2020-12-29 | ||
KR1020200186554A KR102512983B1 (en) | 2020-12-29 | 2020-12-29 | Method of manufacturing hollow product using draft |
PCT/KR2020/019358 WO2022145530A1 (en) | 2020-12-29 | 2020-12-30 | Hollow product manufacturing method using draft |
Publications (1)
Publication Number | Publication Date |
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US20230150017A1 true US20230150017A1 (en) | 2023-05-18 |
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Family Applications (1)
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US17/622,638 Abandoned US20230150017A1 (en) | 2020-12-29 | 2020-12-30 | Method of manufacturing hollow product using draft angle |
Country Status (3)
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US (1) | US20230150017A1 (en) |
KR (1) | KR102512983B1 (en) |
WO (1) | WO2022145530A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060048911A1 (en) * | 2004-09-09 | 2006-03-09 | Newcomb Thomas P | Cylinder bore liners for cast engine cylinder blocks |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3502476B2 (en) * | 1995-05-31 | 2004-03-02 | 積水化学工業株式会社 | Manufacturing equipment for electric fusion joints |
JPH09248859A (en) * | 1996-03-18 | 1997-09-22 | Janome Sewing Mach Co Ltd | Production of hollow fiber reinforced resin molded object |
JP2005040983A (en) * | 2003-07-22 | 2005-02-17 | Bridgestone Corp | Mold for molding resin pipe molded product |
KR200395925Y1 (en) * | 2005-07-01 | 2005-09-14 | (주)대덕화학 | Electrical Fusion Joint for Sewer pipe |
KR101761677B1 (en) * | 2016-12-29 | 2017-08-07 | 엠에이치기술개발 주식회사 | Cooling apparatus for motor housing |
-
2020
- 2020-12-29 KR KR1020200186554A patent/KR102512983B1/en active IP Right Grant
- 2020-12-30 WO PCT/KR2020/019358 patent/WO2022145530A1/en active Application Filing
- 2020-12-30 US US17/622,638 patent/US20230150017A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060048911A1 (en) * | 2004-09-09 | 2006-03-09 | Newcomb Thomas P | Cylinder bore liners for cast engine cylinder blocks |
Also Published As
Publication number | Publication date |
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KR20220094885A (en) | 2022-07-06 |
WO2022145530A1 (en) | 2022-07-07 |
KR102512983B1 (en) | 2023-03-23 |
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