Here is Connector Stamping Mould Manufacturer talking about Method For Reducing Shape Error By Guide Post Guide Sleeve.
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Since the matching clearance of the guide bush is affected by the punching clearance requirement and the machining requirements of the guide bush bushing, the minimum fit clearance cannot be selected to be large, and thus the shape and position tolerance of the guide bush are required to be strict. It brings difficulties to mold manufacturing. Here are some solutions.
(1) Change the fixing method of the guide post guide sleeve. It is more common to design the guide sleeve into a flange shape, adjust the punching clearance during assembly, and then fasten the guide sleeve with screws and position it with a pin. The guide post guide sleeve is also fixed to the upper and lower molds by using an epoxy resin or the like.
(2) The mounting hole of the guide bush guide sleeve is processed by the method of arranging, reducing the position error of the two holes.