Ensuring success in mold making
Can anyone fill in on the do’s and dont’s in mold making to ensure surefire success, especially in the area where parts dimensions are affected by factors other than shrinkage such as deflection or uneven wall thickness or flexing due to geometry.I would also like everyone to focus on do’s and dont’s for parts with very close tolerances and how to achieve them.
Do's- Provide a rigid Taper lock-(Core Holder with Core, Core With Cavity)
Do's- Provide male radius slightly bigger than Female.
Do's- Provide Sufficient airvents
Do's- Allow Pillar and Bush To Guide First
Dont's- Never let Air ejection to project more than 0.05mm, from the matching surface
My major skills are :
•3D modeling & Designing of Tools.
•Designing, Modeling & Drawing skillful added mechanical design software .
( CAD/CAM )
• (Solidworks (with all adds ins)..., UG, Catia, Powershape, Powermill, MDT, Mold flow...) proficiency.
•Skillful in general software (Ms-office, Ms-project, Visio)
•Quality control equipments.
• ISO-TS requirements, process audit, product audit,CTFE ,feasibility study,FMEA,SQFE,survay plan.
•Design of sheet metal Die (progressive stamping Die , G groups Die),Design of any type of Injection Mold, experience in mold and process troubleshooting.
• JIG & FIXTURE Design, Special machines design,..., Fine-blanking Tool design ,Tools PM ,
•Design of Panel Gauge Based on GD&T .
•Mechanical and hydraulic press machine, High speed & Progressive press machine, Injection Molding Machine PM.
,• Design of Hydraulic and Pneumatic circuit Diagram.
•CNC programming by Powermill software.
•Metal, polymer selection knowledge.
•Machinery Tools and Equipments selection knowledge.
•NDT (nondestructive testing).
The mantra then is , stay steel safe and correct after first trials.I think the more the experience the closer one gets to the final size.I remember a plastic part somewhat like a small push fitting with two wings with a control dimension on wingtips at 16mm +/- 0.05. The tips would collapse a good 1mm after injection moulding and took us over four iterations to achieve the tolerance required.The do's would be to keep correctable inserts and be able to predict collapse.
This is the sort of part that I would like to come closer to in the first attempt.