How to

As a injection mold manufacturer, we received a lot of inquiries from our website and B2B, an interesting phenomenon is the professional/ potential customers usually very clear about what they need, the information provided by them are very specific, we take serious for this kind of inquiries. On the other hand, inquiries with very little information could be a signal of no intention to purchase; we do not put it in priority. This explains why you get very few replies when you send inquiries to many injection mold manufacturers, you did not inquiry like a professional.

All the mold and injection molding project are custom manufacturing project, so it's not like other common product, the demands are always diverse, injection mold factories need to know the detailed demands of the customer before they can provide the most suitable solution, it's much more than pricing, it's a custom made solution.

We have to some correction of water flow and temperature of water with mold temperature control unit, but it is extra cost and setting it to optimum level with minimum extra energy cost is critical and time consuming.

At corners, forces are in 3d for shrinkage, some corners require the design to be compromised or if not to compromise an another pre made filler plastic insert to added while molding and/or extra cooling at corners externally and/or by giving feeding material (hot), ie an extra gate point with, and its direction of feeding material, towards the shrink pulling.

Quick link of the Troubleshooting Guide:

1) Dark brown spots 2) Brittle fracture 3) Bubbles (Or Steelyard balance : stranded gas) 4) Burn marks 5) Plastic injection molding machine of mucosa 6) Grain crack 7) Plastic degradation 8) Injection molded parts deforms 9) Injection molded cloak 10) Injection molded parts does not shrink 11) Surface roughness 12) Silver streak

13) Surface wrinkled skin texture 14) Color distribution 15) Fusion line location decline 16) Insufficient filling 17) Injection molded parts size differences 18) Systolic trace 19) Dirt marks 20) Sprue adhesion 21) Empty hole 22) Curved injection molded parts 23) Spraying trace 24) Surface layer (peeling)

After we finish assembling a new mold, we need to launch it and do a mold tryout.

The mold designer and mold maker sometimes made mistakes, any small mistakes could lead to major damage of the injection mold, the purpose of mold tryout is to find out any potential defects and ensure the mold perform stable and efficiency during molding production. If the tryout process did not follow reasonable procedures and make the appropriate records, then we cannot guarantee smooth production, this could cause serious problem, it means much higher cost or even delay for mass production.

Let's face it, those of us in the plastics molding industry typically have to deal with sink marks with most parts. We all understand that the Geometry, Variations in Wall stock and Interior features sometimes go beyond design guidelines and result in sink marks. For reducing sink marks there are some process adjustments that may resolve the problem. If you have Quality Tooling and an accurate water temperature controller, you might be able to "Freeze Off" the Cavity side of the part while keeping a good hold pressure on the resin. This technique would usually add time to the total cycle but perhaps worth it. I have also used the RHRC (Rapid Heat Rapid Cool) process which is not used at many molders since it requires a Steam System that is piped to the Molding Presses