Choosing plastic mold steel is a very important process in mold manufacturing, because the classification of plastic mold are generally on the length of plastic mold by 5 grades, grade1 is over a million times; grade 2 is 500,000-100 million; grade3 is from 300,000 to 500,000; grade4 is from 100,000 to 300,000, grade 5 is 10 million below
for Grade1 and 2, mold stell require hardness after heat-treatment reaching around HRC50 , because plastic which is easy to wear, could violate the tolerance, so we should select steel heat afetr treatment showing better performance, but also at high hardness of the state has good cutting performance, normally, it can be introduced to choose imported raw materials in the Pearl River Delta.
Usually chosen in Sweden 8407, S136, U.S. 420, H13, Europe, 2316,2344,083, or Japan SKD61, DC53 (the original mold for the metal material, the use of special circumstances.) grade 1 steel. In addition, raw plastic materials and the added filler have a great impact on the mold steel choice, especially glass fiber could have a very strong worn impact on the mold cavity surface.
Some plastic materials have acid corrosion, and some added modified enhancer or other agent, such as glass fiber lead to mold damage, so plastic material selection should be considered. There is strong general election corrosive plastic S136, 2316,420 grade1 steel, then weak corrosive plastic should elect S136, 2316,420, there SKD61, NAK80, PAK90, 718M. Strong acid plastic material: PVC, POM, PBT plastic material weak acid has: PC, PP, PMMA, PA,
Product appearance of the requirements of the selection of plastic mold material there is also a great impact, transparent pieces and surface requirements of parabolic mirror products, may choose to use the material S136, 2316,718 S, NAK80, PAK90, 420, high transparency of the mold should choose S136 and 420.
More than meeting the product requirements are from the run, but, are you involved in the demand for the cost of molds? you should also consider price, Take the S136 to compare with 2316, a difference of 55-60 yuan per kilogram, if you choose incorrectly, you may lose much money
Pre-hardened mold steel , there is grade: S136H, 2316H, 718H, 083H, hardness HB270 —- 340, 45 die by P20, 718,738,618,2311,2711, particularly low for the requirements molds, may have used S50C, 45 # steel, that is, directly in the mold cavity up to do.
When plastic is molded, due to molecular stretching and shearing, residual stress is left in the product, which causes the product to warp and even crack.
Residual stress is also generated during the machining of the mold steel. This residual stress causes the mold to deform or even crack.
The prime function of any mould steel must be that of meeting the service requirements imposed upon it.
Moulding requirements vary， e.g., from simple prototype work undertaken on soft aluminum construction moulds to fully hardened alloy steel volume production moulding to close dimensional tolerances.
The plastic mold application must be thoroughly investigated and fully understood before a selection decision can be made to avoid costly long-term mistakes.
Once decided upon， the selected material should be written into the tooling specification for future procurement purposes.
Using a tooling specification laying out the mould requirements before tool quotation or construction greatly reduces the risk of fundamental mistakes at the toolmaking stage.
The choice of mould steel is of great importance if the mould is to function effectively.
When plastic is molded, due to molecular stretching and shearing, residual stress is left in the product, which causes the product to warp and even crack.
Residual stress is also generated during the machining of the mold steel. This residual stress also causes the mold to deform or even crack.
The prime function of any mould steel must be that of meeting the service requirements imposed upon it.
Moulding requirements vary，e.g. from simple prototype work undertaken on soft aluminium construction moulds, to fully hardened alloy steel volume production moulds moulding to close dimensional tolerances.
In order to avoid costly long-term mistakes, the plastic mould application must be thoroughly investigated and fully understood before a selection decision can be made.
Once decided upon，the selected material should be written into the tooling specification for future procurement purposes.
The use of a tooling specification laying out the mould requirements prior to tool quotation or construction greatly reduces the risk of fundamental mistakes being made at the toolmaking stage.
Hi
Could you please suggest me mold steel material for processing polysulfone transparent material?
Hi Ajay, the mold steel for transparent material is easy to find in your market, but if your product has some special requirement, maybe we can have talk.
I am responsible for the purchase of mold steel in the company. I think your experience is worth learning.
As a mold engineer, I think the correct mold material is very important to the success of the mold.
I agree you at all, thanks for sharing
I am in charge of purchasing mould steel in the company. I very much agree with your experience.
The most important is to select the mold steel according to the requirements of the product.
thanks for sharing experience on this issue, actually we always do like this
In fact, there are many kinds of mold steel, the right choice is very important.
your suggestions about choosing mold steel are very helpful, thanks for sharing
it is very important for every mold designer to correctly choose mold steel
when selecting mold steel, we should be familiar with plastics.
After reading your blog, I think I still need to learn a lot of knowledge to become a good mold designer.
It is very important to choose mold steel correctly.
In fact, the mold steel suppliers will give a copy of all kinds of the material about mold steel, as a mold designer, you can correctly choose mold steel according to it
I think every mold designer should read your blog which contains a lot of information in mold industry
It usually depends on your injection molding material，But sometimes the cost is something to consider.
Frankly, it depends on the offer your customer can accept.
For injection moulds, it is very important to choose steel correctly.
For different mold requirements, our mold designers should know to choose different steel.
thanks for sharing your experience on this issue, it is very useful
The classification of mold steel is becoming more and more detailed, so make sure you know them clearly before you choose them.
this is a good article about choosing plastic mold steel, thanks for sharing
In fact, the mold steel suppliers will give you the information about the composition and performance of the steel, according to this information to choose.
In fact, if you can realize the importance of choosing steel when you are making a mold design, you are already a qualified mold designer.
There are more and more steel suitable for injection moulds.
your experience on this issue is very good, worth studying, thanks for sharing
In actual mold production, many mold engineers often ignore this process.
This is a very good article, as a mold steel seller, I admire your blog!
Product appearance of the requirements of the selection of plastic mold material there is also a great impact.
that is very important for every injection mold designer and engineer
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your experience on this issue is very helpful for me
This is a problem we can not ignore
how to choose plastic mold steel is a very important decision
This is an age-old question
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maybe you are a mould expert, do you have any great ideal?
Steel are used to design the mould and Liquid plastic are injected in the steel mould.