Jenny

By Jenny Temperature can change the length of a mold component while it is being measured, so two readings may not be directly comparable when the part, instrument, or inspection environment differs. Buyers should agree on a dimensional reference temperature, record actual part temperature, identify the material’s thermal-expansion data, and state whether results are compensated […]

By Jenny EDM recast layer inspection determines whether an EDM-machined mold component has the surface condition required for its intended service—not simply whether it looks smooth or measures to size. Approval should combine representative cross-section metallography, surface-texture verification, crack assessment, finishing-stock control, and dimensional reinspection after any removal process. Electrical discharge machining (EDM) removes electrically

Reviewed by XUXIANG Precision Engineering Team Ejector pin clearance must be defined from the mold design, polymer, operating temperature, venting intent and approved component standards; it cannot be reduced to one universal fit number. Verify both the pin and its running bore with traceable measurements, control straightness and surface condition, and assess the assembly under

Reviewed by XUXIANG Quality Team A mold insert pocket fit must locate the insert repeatably, support molding loads, allow the intended assembly method and preserve serviceability through temperature and maintenance. “Slide fit” or “tight fit” is not enough. Datums, tolerances, corner relief, seating surfaces, retention and thermal behavior must be defined together. This workflow supports

Reviewed by XUXIANG Quality Team Mold guide pin and bushing clearance must allow repeatable platen-side alignment through the operating temperature range without binding, impact, excess play or abnormal wear. A nominal diameter difference alone is insufficient. Geometry, position, surface finish, hardness, lubrication, thermal growth and assembly datums determine the working fit. This workflow supports precision

Reviewed by XUXIANG Quality Team An ejector pin witness mark should be accepted or rejected against a drawing-defined location, height or depth, appearance zone and functional requirement—not by the vague instruction “no ejector marks.” Ejection necessarily transfers force to the molded part. The engineering task is to place, size and control that evidence so it

Reviewed by XUXIANG Quality Team A mold insert surface-finish specification must describe the intended functional surface, the finishing method and the inspection agreement in terms that design, tooling and molding teams interpret the same way. A vague note such as “polish,” “matte” or “SPI finish” can leave direction, location, cutoff, gloss, texture replication and repair

Reviewed by XUXIANG Quality Team A hardness result is valid only when the drawing requirement, material condition, test method, scale, surface, thickness, location, instrument verification and individual readings are traceable. One value copied from a heat-treatment certificate may not represent a finished insert, and one indentation at an easy location may not represent the critical

Reviewed by XUXIANG Quality Team Engineering change control prevents an approved mold component from being altered through an informal drawing, program, material or process update. A change is complete only when its need, technical impact, authorization, implementation, inspection and release are traceable. Sending a revised CAD file without disposition leaves purchasing, machining and quality teams

Reviewed by XUXIANG Quality Team Mold component traceability is the ability to move from a finished insert, core, cavity, slide or pin back to its released drawing, material lot, manufacturing route, inspection evidence and approved changes. A stamped part number alone is not enough if records cannot show which revision and process produced the component.