The Process Of Checking Plastic Samples

After machining, fitting the parting line, and final assembly, the mould enters the testing phase. For a new mould, the first mould test is critical. Through a comprehensive testing process, we can evaluate if the mould systems—such as the injection system, ejection system, and side cores—are functioning correctly.

During testing, plastic parts are produced as samples. By adjusting proper injection parameters, we assess the quality of both the samples and the mold. Before sending the samples to our customers, we perform a thorough checklist to ensure everything is in order, aiming for full customer satisfaction.

Mould Checklist:

Is the mould clean?

Are the mould faces free from corrosion?

Are the mould dimensions correct as designed? Record the actual dimensions.

Is the material of the mould components correct as per the design?

Is the hardness of the mould components correct as specified?

Does the injection system move fully in both injection and ejection directions?

Is the ejection pressure without parts acceptable as per customer requirements?

Is the ejection pressure with parts acceptable as per customer requirements?

Is there any noise during ejection movement?

Does the lifter have anti-rotation?

Is the lifter shaft rod positioned and guided properly?

Does the parting line fit well?

Does the parting line protection plate fit well?

Does the angle location plate fit properly?

Are wear plates present on the sides of the mould?

Does the slide work correctly during both injection and ejection?

Do angle pins have anti-rotation?

Is the guide pin long enough to protect the inside of the mould?

Is one guide pin offset?

Is there adequate venting in the mould?

Are handling holes present on all mould plates as designed?

Is the mould lifting squared?

Does the cooling system function as designed?

Does the hydraulic system work well (if applicable)?

Does the injection system operate correctly? Are hot runner drawings available (if applicable)?

Is the clamping force as per design?

Are water and oil circuits (if applicable) clearly marked with numbers and IN/OUT labels?

Are the water connections positioned correctly as designed?

Are the oil connections positioned correctly as designed?

Are the electrical connections in the correct locations as designed?

Is the mould identification plate present?

Are all wires protected and enclosed according to customer standards?

Samples (Plastic Part) Checklist:

Is the gate position correct?

Are the gating fills balanced for a multi-cavity mold?

Is the gating fill balanced in a single part?

Is the gate jetting?

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 the polishing on the cavity surface acceptable?

Is the polishing on the ribs acceptable?

Is the polishing on the core surface acceptable?

Is the part weight within tolerance?

Does the part have short molding?

Are flow lines or weld lines acceptable?

Are sink marks acceptable?

Is the part gassing?

Is the part sticking to the cavity side?

Is the part’s wall thickness correct?

Does the part show any contamination?

Is the marking present on the part as per customer requirements?

Are the part dimensions correct per the drawing/3D data? Is the part measurement report available?

Once all items on the checklist are completed and verified, we will send the samples to our customers for confirmation.

For inquiries or further assistance, please contact Shine:

Email: shine@swymould.com

Mob/WhatsApp: +86 157 5766 8880