July 14, 2022

The feed throat temperature in injection molding process

blog aco mold

In general most feed throat temps are from 95 deg (f) to no more than 130 deg (f). And if you stay within those temperatures it will not bother the drying of the material. We run radel which its melt temperatures go up 640 deg (f) and we ran the feed throat at 120 deg (f).

There are some injection machines that have specific feed throat temperature specs. Husky PET machines are an example. However most injection machines do not. There are several things to avoid. Do not get any part of the feed throat cool enough to cause condensation. Do not let the feed throat get hot enough to let the material soften and clump. Outside these cautions you will usually find little effect of the injection molding process from FT temperature.

The throat temperature should be the same as the dryer temperature. This will ensure you will not get any bridging of the material in the throat. If you do not have hot, dry air to the hopper on top of the throat. You can also get wet material depending on your throughput. I have used hot oil to the throat on materials such as Ultem, PEEK, etc.

I have reviewed lab data on the effect of feed throat temperature on molded parts, there is a direct correlation! You need to keep the feed throat hot enough so that it will never condensate and not too hot to clump. The reason Husky and the high end injection molding machine makers put tight controls on this is because they know it can affect quality. How many machine have you seen where the FT water solenoid valve gets stuck, so they just remove it.

Related Blogs

Aco Mold Injection Molding
Achieving Efficiency with Hot Runner Injection Molding Systems in Plastics Manufacturing

Hot runner injection molding systems have been a game-changer in plastic manufacturing. These systems have revolutionized the production process by reducing cycle times, minimizing plastic waste, and increasing overall efficiency. …

blog aco mold
Cost analysis of plastic injection molded products

Many oversea buyers intend to send their inquiries to a bunch of Chinese plastic injection mold makers before they placed order to one of them, choices sometimes just simply made …

bg production
Precision Plastic Injection Molding

Making a super high precision injection mold is only part of the formula required to produce high precision plastic parts. The plastic injection molding process is just as critical, if …

blog aco mold
Can I eliminate parting line on molded plastic parts?

You need to review those mold drawings, BOM and verify if the materials used were actually used and if they are the correct materials for your type of plastics and …

Tell us your request right now and contact us today about getting started on your next project together!


Or Fill Out The Contact Form Below:

Support Your Business with Better Molding Solution

Contact Info
Copyright © 2023, ACO Mold. Terms of Service and Privacy Policy. All rights reserved.  Powered by ACO MOLD.
1 1.png

Join Our Network

Please email to sales@acomold.com
or fill out the contact form below: