| 摘要 |
PURPOSE:To make it possible to cover a base material with synthetic resin at low cost by a method wherein the base material, on the surface of which plating is applied, is inserted in the cavity of a heated mold under the conditions that a part of the base material is supported by the mold and molten synthetic resin, the temperature of which is higher than the melting temperature of plating and lies within the predetermined temperature range, is filled in the cavity. CONSTITUTION:The thickness and length, by which a mold 2 support, of a base material 1 is set so as not to melt plating through the transfer of the heat of molten synthetic resin to the mold side. When the base material 1 is supported overhung by the mold 2, the length L of the supported portion of the base material depends on the length L1 of the portion, which locates in the cavity 3, of the base material or the relationship between the latter L1 to the former L is set to be L1divided by L<=30. Under the condition that the mold overhangs the base material by the length L of the supported portion, molten synthetic resin, the temperature of which is set less than or equal to 450 deg., is poured in the cavity so as to cover the base material locating in the cavity. Thus, the base material, which is plated with the plating having lower melting temperature, can be inserted by the molten synthetic resin, the temperature of which is higher than the low melting temperature of the plating. Further, since the above-mentioned constitution is simple, the insert molding can be mass-produced at low cost. |
