Monolithic precursor test coupons for testing material properties of metal-injection-molded components and methods and apparatuses for making such coupons

A method of removing flash from a gauge portion of a monolithic precursor test coupon using a flash-removal tool is provided. The flash-removal tool comprises a tool body, extending along a longitudinal tool axis, a tooth, and an engagement surface, spaced apart from the tooth along the longitudinal tool axis. The tooth projects from the tool body in a first direction and comprises a shearing surface, facing in the first direction and located an offset distance away from the longitudinal tool axis in a second direction. The method comprises steps of coupling the engagement surface of the flash-removal tool against a first precursor-coupon end of the monolithic precursor test coupon, orienting the longitudinal tool axis parallel to a longitudinal symmetry axis of the monolithic precursor test coupon, wherein the shearing surface registers longitudinally with the flash, and shearing, using the shearing surface, the flash from the gauge portion.

Monolithic precursor test coupons for testing material properties of metal-injection-molded components and methods and apparatuses for making such coupons

A metal-injection-molding (MIM) apparatus for making a monolithic precursor test coupon comprises a mold, defining a mold cavity. The mold cavity comprises a first-grip-portion cavity and a second-grip-portion cavity. The mold cavity also comprises an intermediate-portion cavity, interconnecting the first-grip-portion cavity and the second-grip-portion cavity. The mold cavity further comprises runner cavities, directly interconnecting the first-grip-portion cavity and the second-grip-portion cavity and not directly connected to the intermediate-portion cavity. The MIM apparatus additionally comprises an injector, operable to inject feedstock material that comprises a metal powder, into the mold cavity to form the monolithic precursor test coupon.

Monolithic precursor test coupons for testing material properties of metal-injection-molded components and methods and apparatuses for making such coupons

A flash-removal tool comprises a tool body, extending along a longitudinal tool axis, and a tooth, projecting from the tool body in a first direction. The flash-removal tool further comprises an engagement surface, perpendicular to the longitudinal tool axis and located a preselected distance away from the tooth along the longitudinal tool axis. The tooth comprises a shearing surface, facing in the first direction and located an offset distance away from the longitudinal tool axis in a second direction. The first direction and the second direction are orthogonal to each other and define a plane, perpendicular to the longitudinal tool axis.

Head gasket in motor of ship - made with aluminium@ core having similar electrode potential to that of surface of motor block and cylinder head

Head gasket for a ships motor which is cooled by the motor in which the strip moves consists of a metal core (52) with upper and low (58,60) coatings. The electrode potential of the core is approx. equal to that of the non-ferrous metal surfaces of the motor block (14) and cylinder head (12). The surface of the motor block and cylinder head are made of Al as is the core of the head gasket. The coating layers may be fixed to the core by using an adhesive (64) which is solvent based and water resistant or by mechanical means. The core is perforated to correspond to the openings in the head and block sections. The main openings (66) are provided with ring shaped metallic fire seals (74) which overlays the core on both the upper and lower surfaces (76,78). The fire seal is pref. made from stainless steel. ADVANTAGE - Galvanic corrosion between the gasket and motor surfaces is minimised.

Cylinder head gasket with aluminium core for marine engines and marine engine equipped with such a gasket

A cylinder head gasket for use in a marine engine designed to be cooled by the water in which it is operating, the engine including a cylinder head made of a non-ferrous alloy and an engine block made of a non-ferrous alloy, the engine block and cylinder head both, preferably, being made of aluminium alloy. The gasket comprises a metal sheet forming a core (52), the core including upper (54) and lower (56) surfaces, layers (58, 60) of external material located fixedly on the said upper (54) and lower (56) surfaces, and in which the electrolytic solution potential of the metallic sheet is substantially equal to the respective electrolytic solution potentials of the engine block and of the cylinder head.

Aluminum core cylinder head gasket for marine engines

ABSTRACT A cylinder head gasket for use in a marine engine adapted to be cooled by the water in which the engine is running, the engine having a non-ferrous alloy cylinder head and a non-ferrous alloy engine block, both the block and cylinder head preferably being made of aluminum alloy. The gasket includes a metallic sheet forming a core, the core having upper and lower surfaces, layers of facing material securely disposed upon those upper and lower surfaces, and wherein the electrolytic solution potential of the metallic sheet is approximately equal to the respective electrolytic solution potentials of the engine block and the cylinder head.

System and method for inspecting components fabricated using a powder metallurgy process

A nondestructive inspection method includes steps of: (1) forming a first inspection standard using a metal injection molding process; (2) forming a second inspection standard using the metal injection molding process; and (3) creating a reference library that includes the first and the second inspection standards. The first inspection standard includes a first crack, induced by at least one of a thermal shock and a thermal stress. The second inspection standard includes a second crack, induced by at least one of the thermal shock and the thermal stress. At least one of the thermal shock and the thermal stress introduced during a sintering operation for the first inspection standard is different than at least one of the thermal shock and the thermal stress introduced during the sintering operation for the second inspection standard. The first crack and the second crack are different.

System and method for inspecting components fabricated using a powder metallurgy process

A method for nondestructive testing includes steps of: (1) forming a first inspection standard using a metal injection molding process; (2) forming a second inspection standard using the metal injection molding process; and (3) creating a reference library that includes the first inspection standard and the second inspection standard. The first inspection standard includes first voids that are induced by a first set of conditions of a sintering operation and a hot isostatic pressing operation of the metal injection molding process. The second inspection standard includes second voids that are induced by a second set of the conditions of the sintering operation and the hot isostatic pressing operation. At least one of the conditions in the second set of the conditions is different than at least one of the conditions of the first set of the conditions. The first voids and the second voids are different.

Monolithic precursor test coupons for testing material properties of metal-injection-molded components and methods and apparatuses for making such coupons

A monolithic precursor test coupon (100) comprises a first grip portion (110), a second grip portion (112), and an intermediate portion (114), interconnecting the first grip portion (110) and the second grip portion (112). The monolithic precursor test coupon (100) also comprises runners (130), directly interconnecting the first grip portion (110) and the second grip portion (112) and not directly connected to the intermediate portion (114). The first grip portion (110), the second grip portion (112), the intermediate portion (114), and the runners (130) are composed of a substance (150) that comprises metal powder (748) and that is in a green state.

Monolithic precursor test coupons for testing material properties of metal-injection-molded components and methods and apparatuses for making such coupons

A monolithic precursor test coupon (100) comprises a first grip portion (110), a second grip portion (112), and an intermediate portion (114), interconnecting the first grip portion (110) and the second grip portion (112). The monolithic precursor test coupon (100) also comprises runners (130), directly interconnecting the first grip portion (110) and the second grip portion (112) and not directly connected to the intermediate portion (114). The first grip portion (110), the second grip portion (112), the intermediate portion (114), and the runners (130) are composed of a substance (150) that comprises metal powder (748) and that is in a green state.

金属射出成形部品の材料特性を試験するための一体型前駆体試験クーポン、並びにそのようなクーポンを作成するための方法及び装置

【課題】クーポンの損傷リスクを軽減する、金属射出成形部品の材料特性を試験するための一体型前駆体試験クーポンの提供。【解決手段】一体型前駆体試験クーポン（１００）は、第１の把持部分（１１０）と、第２の把持部分（１１２）と、第１の把持部分（１１０）と第２の把持部分（１１２）とを相互に連結する中間部分（１１４）とを含む。一体型前駆体試験クーポン（１００）はまた、第１の把持部分（１１０）と第２の把持部分（１１２）とを直接相互に連結し、かつ中間部分（１１４）に直接連結されないランナー（１３０）を含む。第１の把持部分（１１０）、第２の把持部分（１１２）、中間部分（１１４）、及びランナー（１３０）は、金属粉を含み、かつグリーン状態である物質（１５０）からなる。【選択図】図２Ａ

Monolithic precursor test coupons for testing material properties of metal-injection-molded components