Gate Type & Mold Steels

The type of gate depends upon a number of factors including the following:

1. Are you using hot runner or cold runner? Both runners have a number of gate types to choose from. For example, commonly used gates for cold runners are tab, submarine and pin gates. For hot runners hot tip and valve gates.

2. The shape of the part influences the type of gate. For example, flat parts often use a tab gate. Flat parts can also use valve gates for hot runners and allow gating in the centre of the part (such as a lid) and leave a clean flat gate mark.

3. Part material. Some plastic materials require a larger gate because they are shear sensitive (such as PET) than other materials so a large tab gate for a cold runner design or a valve gate for a hot runner design are often used. Pin gates or hot tip gates should be avoided with shear sensitive materials.

4. Part cosmetic requirements. Some gates are designed to leave minimal gate vestige such as a submarine gate.

Finally, the type of gate used is very dependent on the application. Every part has different requirements so each one must be studied on a case by case basis.

 

The mold material mainly depends upon the annual shot quantity requirement. But it also depends upon part design and part plastic material.

For shot quantity requirements of less than 500,000 prehardened tool steel (called P20) is most commonly used for cores and cavities and the mould base.

Although mild steel could also be used for the mould base as well.This steel is cheap.

Also, aluminium is growing in popularity in the automotive sector.Aluminium is much easier to machine and handle compared with tool steel so the cost of manufacture is less.Cycle times are also better but mold maintenance is critical to ensure part quality – anybuild up of residue will damage the shut off surface and cause part flashing.

Anything above 500,000 the use of thru hardened tool steels such as H13 or H11 should be considered for the cores and cavities. These materials will produce quality parts for much longer than P20 or aluminium because mould wear is less.

For corrosive environments such as when molding PVC plastic, stainless steel tool steels can also be used in mold construction. Stainless steels will minimize corrosion.

In addition to the above, part design & mould design play a role in material selection.. Some part designs will require moving or rotating components in the mould design. One option is to use nitriding steels so that “pick up” or damage does not occur when mould components move relative to each other. Examples of nitriding steels are P20 & H13.

26 thoughts on “How to choose the correct gate type and the correct mold steel?

  1. Hello,I log on to your blog named “How to choose the correct gate type and the correct mold steel? | Your Factory In China” daily.Your humoristic style is witty, keep it up! And you can look our website about proxy list.

  2. I like this weblog very much, Its a very nice billet to read and incur info . “What happens to the hole when the cheese is gone” by Bertolt Brecht.

  3. is

    Which Battery Type? | Wireless Home Security Systems

  4. I have not checked in here for some time as I thought it was getting boring, but the last several posts are great quality so I guess I¦ll add you back to my daily bloglist. You deserve it my friend :)

  5. I’ve been surfing on-line greater than 3 hours as of late, but I never discovered any fascinating article like yours. It is beautiful worth enough for me. In my opinion, if all webmasters and bloggers made good content material as you did, the internet shall be a lot more helpful than ever before.

  6. An interesting discussion is worth comment. I think that you should write more on this topic, it might not be a taboo subject but generally people are not enough to speak on such topics. To the next. Cheers

  7. A person essentially help to make severely posts I might state. That is the very first time I frequented your website page and up to now? I amazed with the research you made to make this particular put up incredible. Wonderful job!

  8. It seems like a single of the guys could manage one particular skinny girl twerking but when the other came it was too considerably for him.

  9. girls are genius when it comes to mixing the art of dancing and the art of being attractive at the same time.|The suit described the abuse suffered by girls at the northern Minnesota

  10. I simply want to tell you that I’m newbie to blogging and really enjoyed this page. Almost certainly I’m want to bookmark your site . You absolutely come with beneficial stories. Appreciate it for sharing with us your website.

  11. Faytech North America is a touch screen Manufacturer of both monitors and pcs. They specialize in the design, development, manufacturing and marketing of Capacitive touch screen, Resistive touch screen, Industrial touch screen, IP65 touch screen, touchscreen monitors and integrated touchscreen PCs. Contact them at http://www.faytech.us, 121 Varick Street,3rd Floor,New York, NY 10013,+1 646 205 3214

  12. “hi!,I love your writing very much! proportion we communicate more about your post on AOL? I need an expert in this area to resolve my problem. May be that’s you! Having a look ahead to look you.”

  13. MetroClick specializes in building completely interactive products like Photo Booth for rental or sale, Touch Screen Kiosks and Digital Signage, and experiences. With our own hardware production facility and in-house software development teams, we are able to achieve the highest level of customization and versatility for Photo Booths, Touch Screen Kiosks and Digital Signage. MetroClick, 121 Varick St, #301, New York, NY 10013, +1 646-843-0888

  14. As a Newbie, I am constantly browsing online for articles that can be of assistance to me. Thank you

  15. Great write-up, I’m regular visitor of one’s blog, maintain up the excellent operate, and It is going to be a regular visitor for a long time.

  16. But wanna remark on few general things, The website design is perfect, the articles is very wonderful : D.

  17. You made some good points there. I did a search on the subject matter and found most people will go along with with your site.

  18. Thank you a lot for giving everyone a very spectacular chance to read articles and blog posts from this site. It can be very amazing plus stuffed with a good time for me personally and my office co-workers to search the blog at a minimum three times in 7 days to study the latest things you have got. And lastly, we are actually astounded with the unique creative concepts served by you. Selected 1 areas in this article are in reality the most impressive I have had.

  19. It¡¦s actually a nice and useful piece of info. I am satisfied that you simply shared this helpful info with us. Please keep us informed like this. Thank you for sharing.

  20. It’s almost unattainable to encounter well-advised viewers on this subject, fortunately you come across as like you comprehend which you’re raving about! Cheers

  21. It is appropriate day to construct some options for the future. I have looked over this post and if I may just, I wish to recommend you handful important instruction.

  22. This is very interesting, You are a very skilled blogger. I’ve joined your rss feed and look forward to seeking more of your great post. Also, I’ve shared your web site in my social networks!

  23. I will immediately grab your rss feed as I can not in finding your email subscription hyperlink or e-newsletter service. Do you have any? Kindly let me realize so that I may subscribe. Thanks.

  24. Hello There. I found your blog using msn. This is an extremely well written article. I’ll make sure to bookmark it and come back to read more of your useful information. Thanks for the post. I will definitely comeback.

  25. My brother suggested I might like this web site. He was entirely right. This post actually made my day. You can not imagine just how much time I had spent for this information! Thanks!

Leave a Reply