the first principle for deciding on the parting line is to assure the plastic part’s appearance. Because during molding, the parting plane may easily lead to welding marks or overflow, it is hard to clean the mold, so a better choice of the parting plane is to help to form smooth, rounded corners on the plastic part.
The first place to know the best parting line to use for an injection molded product is the mold design. In some parts, the choice is obvious while it might not be so clear in some places. This section will address the importance of parting lines in plastic design.
The first consideration is to determine the opening direction of the mold relative to the part. Machinists call this factor “the line of draw.” It is very important in determining how the design of the part will look like. It also helps to know which sides to add the features of the product. Apart from this, it also helps to determine how the vestiges left by the two halves of the injection molded product will look like on the final product.
Another factor that is important when determining the parting line is where to place components on the part. This is because the shrinking of plastic while it cools might shift the position of the part in the mold. This could displace the functional features of the part, rendering it useless. Also, the machinists should ensure the shrinking part doesn’t shrink too hard to avoid difficult ejection.
One way to ensure the components stay in the right place is to draft the walls of the injection molded part away from the parting line. The more draft, the less the probability of the features falling apart.
Another good way to determine the part line in injection molding is with checking the Design for Manufacturability (DfM) of your product. Apart from suggesting the best positions for your part line, it also helps to check for defects and optimize your part for manufacture. This will help provide economic options to manufacturing your part.
With all injection-molded parts, there are several ways to address parting line challenges. An awareness of the significance of the parting line is a good start. As stated earlier, parting line location is obvious and not a problem on many parts. For more complex parts, you may be able to use tools within some CAD packages to locate and evaluate split lines, or you can just upload a 3D CAD model online and we’ll propose a parting line and suggest appropriate draft based on that orientation. Our software may also point out that the part cannot be made in a straight-pull mold and that design changes, side-actions, and/or pickouts may be required.
keep in mind that the suggested parting line may not be your only option. Neither your CAD program nor our design analysis software knows how you intend to use the part. Look carefully at the suggested parting line and consider whether its location will work both cosmetically and functionally. If not, there may be other options for your existing design, or you may want to change the design to allow a more suitable parting line for your application.
I’ve found that your blog lists a lot of rules about the design of the parting line, and you’re really a good mold engineer.
as a mold designer, i can understand the importance of parting line
all the rules about deciding the position of parting line you mentioned in this blog are very helpful for my mold design
the position of parting line is very important for mold design
Be careful to determine the location of the parting line, since it cannot be changed after the mold is finished.
yes! parting line design is very important
all the rules for designing parting line you mentioned in this blog are very useful for me:-) thanks!
It is very prudent to decide the position of the parting line， your blog on this topic is very helpful
actually every time, we always have a meeting to discuss this parting line design for a new product
the appearance of almost plastic products is very important，but there are some exceptions
all principles you mentioned about designing parting line is very helpful for many mold designers
I needed to thank you for this great read!! your blog is great. parting line position is very important for every mold design
as a mold designer, I agree all the experience you shared about designing parting line.
your design principle about designing parting line is very useful for me. thanks for sharing
no doubt parting line is very important for an injection mold design
i am a mould designer, your principles about deciding parting line are very helpful for some fresh mold designers
as a mould designer, I understand The importance of parting line
your experience on mold design is very good, thanks for sharing
actually it is very importance to decide the position of parting line in every mold design
as a mold designer, I understood the importance of the parting line
as a mould designer, I can understand deciding the parting line position is very important
appearance is very important for a plastic part
parting line is very important for injection mold design
every body knew the appearance of almost every product is very important
Hello, just want to tell you, I learned something useful from this post. please Keep on posting!
in mold design, the position of parting line is very important
the position of the parting line is very important in mold design
Hey! this is a very nice blog! I like to read!
we often have the discussion about deciding the position og parting line when designing some new molds
in plastic product, appearance is very imoportant
as a mold engineer, I understand the location of the parting line in every mould is very important
Thank you for sharing your experience on deciding parting line position
yes! especially for The shell of electronic products
.
parting line position is very important for mold design
thanks for sharing your experience on this issue
your suggestion on this issue is worth studying
appearance is a very important factor for a new product design, so when our mold designer designs a mould for it, please consider the parting line position carefully
the plastic part’s appearance requirement is very important.
appearance requirement for a new product is very importance
I can understand your suggestion!
yes! the plastic part’s appearance is very important
yes! that is very important.
parting line position is a very important decision in mould design
thanks for sharing your experience on mold design
the position of parting line is very important
as a mold designer, I understand your meaning
Thanks for sharing your thoughts on the parting line of plastic part.
Regards
for an injection mould design, the parting line position is very important
the plastic part’s appearance is very important, but sometimes, we need a balance between product struture design and mold design
Yes! every mold designer absolutely know parting line is the most important decision in a mold design
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