Electrical junction block for automobile and a method for manufacturing the same

Claim 1

An electrical junction block for an automobile which can be used in an atmosphere at temperatures equal to or higher than 70° C, comprising at least one metal bus bar formed in at least one preset circuit pattern as a wiring means in a case body, said case body being formed from a molded nylon polymer alloy, wherein said nylon polymer alloy consists essentially of 40 to 60 weight % nylon and 60 to 40 weight % polyphenylene ether or an ABS resin, as the main components thereof; said nylon polymer alloy having (i) a tensile elongation retention in an aging test in which said alloy is left for 24 hours at a temperature of 170° C. of 50% or more, (ii) a notch Izod impact value of 12 Kg.cm/cm or more and (iii) a melt flow rate under a 5 kg load and at a temperature of 280° C. of 20 g/10 minutes or more.

Claim 10

A method for manufacturing an electrical junction block for an automobile which can be used in an atmosphere at temperatures equal to or higher than 70° C., comprising: molding an upper case body on which mounting portions for mounting functional parts and mounting portions for mounting connection connectors for input/output wires are formed and molding a lower case body which is engaged with said upper case body and on which mounting portions for mounting connection connectors for input/output wires are formed by using a nylon polymer alloy, wherein said nylon polymer alloy consists essentially of 40 to 60 weight % nylon and 60 to 40 weight % polyphenylene ether or an ABS resin, as the main components thereof; said nylon polymer alloy having (i) a tensile elongation retention in an aging test in which said alloy is left for 24 hours at a temperature of 170° C. of 50% or more, (ii) a notch Izod impact value of 12 Kg.Cm/cm or more and (iii) a melt flow rate under a 5 kg load and at a temperature of 280° C. of 20 g/10 minutes or more; disposing insulative plates, on which metal bus bars formed in preset circuit patterns are disposed, into said upper and lower case bodies, without subjecting said upper and lower case bodies to a moisture absorption process; and mounting one or more functional parts on said upper case body.

Claim 11

A method for manufacturing an electrical junction block for an automobile which can be used in an atmosphere at temperatures equal to or higher than 70° C., comprising: molding an upper case body on which mounting portions for mounting functional parts and mounting portions for mounting connection connectors for input/output wires are formed and molding a lower case body which is engaged with said upper case body and on which mounting portions for mounting connection connectors for input/output wires are formed by using a nylon polymer alloy, wherein said nylon polymer alloy consists essentially of 40 to 60 weight % nylon and 60 to 40 weight % polyphenylene ether or an ABS resin, as the main components thereof; said nylon polymer alloy having (i) a tensile elongation retention in an aging test in which said alloy is left for 24 hours at a temperature of 170° C. of 50% or more, (ii) a notch Izod impact value of 12 Kg.Cm/cm or more and (iii) a melt flow rate under a 5 kg load and at a temperature of 280° C. of 20 g/10 minutes or more; disposing insulative plates, on which metal bus bars formed in preset circuit patterns are disposed, into said upper and lower case bodies, without subjecting said upper and lower case bodies to a moisture absorption process; and mounting one or more functional parts on said upper case body.