Welcome Professional Custom Parts Machining and Mold Service Provider
When mold finish machining, fitting parting line and final assembly, it steps into tryout procedure. To a new mold, the first mold tryout is very important. By means of a complete tryout procedure, we can evaluate if the mold function works well including injection system, ejection system and side cores system and so on
During tryout, the plastic parts are samples. With proper injection parameters, we can evaluate the quality of samples and mold. After tryout, we summarize a correction list in order to obtain good parts eventually and satisfied by customer.
Mold tryout list is aimed at checking mold and samples in details and documented as a report as customer request. It includes the checking list of mold and that of sample. Here, we only list some of checking items in common use.
Check that the following mold requirements are fulfilled:
Is the mold clean?
Are the mold faces free from corrosion and rust?
Are the mold dimensions correct as per design?
⮕ Record the actual dimensions.
Is the material of each mold component correct as per design?
Is the hardness of mold components correct as specified?
Does the ejection system move through full stroke in both injection and ejection directions?
Is the ejection pressure without part acceptable as per customer requirement?
Is the ejection pressure with part acceptable as per customer requirement?
Is there any abnormal noise during ejection movement?
Do lifters have anti-rotation features?
Is the lifter shaft/rod correctly located and properly guided?
Does the parting line fit properly?
Does the parting line protection plate fit correctly?
Does the angle location plate fit correctly?
Are wear plates present on all required sides?
Do slides work correctly in both injection and ejection positions?
Do angle pins have anti-rotation features?
Are guide pins long enough to protect the inside of the mold?
Is one guide pin offset as designed?
Is adequate venting provided in the mold?
Are handling holes provided on all mold plates as per design?
Is the mold lifting square and balanced?
Does the cooling system work properly as designed?
Does the hydraulic system work properly (if applicable)?
Does the injection system work properly?
⮕ Are hot runner drawings available (if applicable)?
Is the clamping force correct as per design?
Are water and oil circuits (if applicable) clearly identified with numbers and IN/OUT markings?
Are water connections correct and positioned as designed?
Are oil connections correct and positioned as designed?
Are electrical connections correct and positioned as designed?
Are mold identification plates present on the mold?
Are all wires properly protected and enclosed according to customer standards?
Check that the following part requirements are fulfilled:
Is the gate position correct?
Is gate filling balanced for multi-cavity molds?
Is gate filling balanced within a single part?
Is there any jetting at the gate?
Is the part free from flash?
Is the part free from distortion during ejection?
Is the part free from ejector pin marks?
Is the part free from damage?
Is there any mismatch on the part?
Is cavity surface polishing acceptable?
Is rib polishing acceptable?
Is core surface polishing acceptable?
Is the part weight within tolerance?
Does the part show any short molding?
Are flow lines or weld lines acceptable?
Are sink marks acceptable?
Is there any gas burning or gassing on the part?
Is the part sticking to the cavity side?
Is the wall thickness of the part correct?
Is the part free from contamination?
Are markings present on the part as per customer requirement?
Are part dimensions correct as per part drawing / 3D CAD data?
⮕ Is a part measurement report available?
Are parts properly packaged in cartons before delivery?
Feel free to reach out—our team is ready to provide quick, clear, and professional support for all your inquiries.
