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Insulated Hookup Wire: Plastic Over-Jacketed onto Copper
Insulated wire is made by over-jacketing extrusion, the usual way to insulate wire: copper wire is pulled through a die while an extruder pushes molten plastic around it. The extruder melts plastic pellets with a turning screw and heaters along its barrel and pushes the melt through a screen pack into the die. With jacketing tooling the melt meets the wire only just before the die lips; with pressure tooling it meets the wire earlier, under high pressure, so the insulation grips the wire. The coated wire is pulled through a water bath to cool, because plastic gives up its heat slowly.
中级
Factory process
说明
1
1
Melt the plastic
Melt the plastic
Feed PVC pellets from the hopper into the extruder barrel. The screw and the heater zones melt them gradually, and the melt passes a screen pack that removes contaminants.
此步骤所需材料：
PVC复合颗粒1 as required所需工具：
颗粒进料斗
塑料挤出机2
2
Coat the wire
Coat the wire
Pull the copper wire through the crosshead die while the melt flows round it. Choose jacketing tooling for a loose jacket or pressure tooling when the insulation must grip the wire.
此步骤所需材料：
铜线1 as required所需工具：
电线包覆直角机头模3
3
Cool
Cool
Pull the coated wire through a water bath until the plastic has set.
此步骤所需材料：
水1 as required所需工具：
水冷槽
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