Vehicular lamp and injection mold and manufacturing method for lamp body of vehicular lamp
AssigneeKoito Manufacturing Co., Ltd.
InventorKouji Shimakura
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Abstract
A vehicular lamp and injection mold and manufacturing method for lamp bodies for producing a plurality of different types of vehicular lamps while resulting in a reduced cost of manufacturing due to sharing of a common injection mold. A lamp body of a tail lamp, for example, includes a reflective surface for reflecting light from a light source bulb forward and is formed with a bulb attachment hole for mounting the light source bulb constituted by an insert-molded surface. That is, part of a reflective surface of the lamp body is formed by an insert-molded surface molded with a cavity surface of an insert constituting a part of a fixed mold of an injection mold. To change to molding a different type of lamp body, it is only necessary to change the insert.
Claims5
An injection mold for a lamp body for use in manufacturing by injection molding a lamp body of a vehicular lamp which includes a reflective surface for reflecting light from a light source bulb forward and which is formed with a bulb attachment hole for mounting said light source bulb on said lamp body, comprising a fixed mold and a movable mold for forming a cavity with a shape corresponding to said lamp body, one of said fixed and movable molds comprising a mold body and an insert detachably attached to said mold body, a part of said reflective surface being molded by a cavity surface of said insert, wherein said bulb attachment hole is formed by said cavity surface of said insert.
A manufacturing method for injection molding a lamp body of a vehicular lamp which includes a reflective surface for reflecting light from a light source bulb forward, and which is formed with a bulb attachment hole for mounting said light source bulb, comprising the steps of:
- configuring a fixed mold and a movable mold for forming a cavity with a shape corresponding to said lamp body with an insert being detachably attached to one of said fixed mold and said movable mold, and
- molding said lamp body in said cavity and comprising molding a part of said reflective surface with a cavity surface of said inserts,
- wherein said bulb attachment hole is formed with said cavity surface of said insert.
Dependencies are inferred from the claim text.