Glossary of Casting Terminology "I"
This glossary lists in alphabetical order casting industry terms and their explanations.
| Word/Expression | Explanation |
|---|---|
| impregnation processing | A process for impregnating the porosity of a casting with resin and inorganic materials and hardening it to prevent leakage of air, water, oil, etc., through the porosity. Impregnation processing may be organic or inorganic. |
| impurities | Trace amounts of unnecessary materials contained in a target material. |
| inboard-outdrive engine | A propulsion mechanism for small watercraft in which the engine is located within the craft's hull and the drive unit (screw propulsion) is positioned outside the stern. |
| indentation | A recessed shape formed by applying pressure to a casting or a test material. In Brinell hardness tests and the like, the diameter of the recess formed in the test piece by a prescribed pressure and load is measured and then converted to ascertain its hardness. |
| induction hardening | A heat treatment process which metals (iron/steel) are subjected to high-frequency electromagnetic waves to cause induction, overheating the surface for quenching. Since only the surface layer of the metal (iron/steel) is hardened in this way, the interior retains its original toughness, so the metal is hard on the surface while retaining its overall flexibility. |
| induction heating furnace | An electric furnace in which the eddy currents in a material begin to flow via electromagnetic induction and the resulting Joule heating used to heat and/or melt metals. Induction heating furnaces are often used as melting furnaces for cast iron. Based on stirring power, they are categorized by capability into high-, medium- and low-frequency induction furnaces. |
| injection | Filling the sleeve of a high-pressure die casting machine with molten metal and then pushing it forward with the plunger tip to fill the product cavity of a mold. |
| inner sheath | A metallic cover on the inside of a cable preventing its insulating material from getting wet or otherwise damaged. |
| insert | Casting and manufacturing in advance various accompanying items, such as a cast iron sleeve for an aluminum casting, and then putting them into a casting mold and pouring the aluminum or other metal in to adhere them together. |
| inside cut | In aluminum die casting and the like, this is the underfill of a product caused by a crack generated on the product portion when breaking a gate with a press or a hammer after casting. Also called “breakage.” |
| inside diameter | The inner diameter of an object with a cylindrical or spherical shape, etc. |
| insulation resistance | The electric resistance between two conductors insulated by an insulating material. |
| intake | An inlet for drawing in a liquid, gas or the like. |
| intensification | In high-pressure die casting, using the pressure of an accumulator to increase injection pressure and then apply it to a casting design and product cavity. |
| interlock | To connect multiple machines or devices together with a control device for coordinated operation. |
| internal defect | A defect that exists within a product such as a blowhole, shrinkage, a pinhole, an impurity or an inclusion. |
| internal thread | The helical grooves drilled down the length of cylindrical or conical holes for receiving a corresponding screw. Also referred to as a “female thread” for receiving a “male thread.” |
| inverse burr | While burrs are generated by metal seeping into a gap between the mating surfaces of a mold, an inverse burr is a phenomenon that occurs when metal that has entered between the mating surfaces or into a dividing section of the mold remains in a convex position to the mold, resulting in product underfill. |
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