Home News

company news about Differences and options for rubber equipment

Customer Reviews
We have purchased several different heat press machines from China. This by far has the evenest temperatures across the two plates and with shore heating time. Really liking this press. very short delivery time, I purchased this item on 9/7/21 and it was delivered on 10/9/21. I was very pleased to have it delivered so fast. Thanks

—— Jay Crue

The press machine looks really beautiful, I look forward to buying another one. Thank you.

—— Darin R.

Hi lily, I have been told that we are having great success with the cooling press but have not been able to get a good lap using the skiving machine. Your help & cooperation is greatly appreciatd. Thank you. Jim Raudenbush

—— Jim Raudenbush

Good morning Daisy I have received the Ply separatorand it works good! Thanks for all your help.I will let you know when I need another piece of equipment for my belt shop. Karmen Bidleman

—— Karmen Bidleman

Everything works as required. everything is within specs. As expected for price and origin one must connect power water, and lubricate before use. Once this is done it operates well. Package was sturdy and contained everything without damage

—— Samuel Meredith

The delivery was fast, thanks to Lily's timely feedback of pictures and videos during the production process. The vulcanizer looks very stable and the details are well handled. You can use it directly after receiving it. The cowshed mat made is very good and the surface is smooth. Many thanks.

—— Ulugbek

I'm Online Chat Now
Company News
Differences and options for rubber equipment
Latest company news about Differences and options for rubber equipment

The most common mixers in rubber manufacturing are the Banbury and the Kneader, both internal mixers, and the rolling mill. The construction of these two internal mixers is similar in regard to their mechanical characteristics, where- as each machine has its preferences for different proce- dures, and they can be used complementarily for optimized time and cost efficiency. Both mixers basically consist of counter-rotating pairs of rotors, a mixing chamber, a float- ing weight (ram), and a feed hopper. The two mixers have different rubber output mechanisms: the rubber exits the Kneader directly from the mixing chamber, which is tilted backwards in order to discharge the material. The Banbury has a drop door, through which the rubber is dropped onto the rolling mill.Both machines are available in different chamber sizes.

Contrary to popular industry belief, a large mixer is not directly linked to a more efficient process or a high quality of the final outcome: with thermally sensitive polymers such as NR and SBR, a certain temperature should not be exceeded during the mixing process. The key advantage of smaller mixers is a more favorable chamber volume to cooling surface ratio. Smaller mixing systems have a superior surface-cooling ratio compared to larger systems: The volume increases in the cube, whereas the cooling surface increases in the square. Consequently, the mixing temperature will always be considerably higher in a larger mixer. Furthermore, in larger mixers it takes longer to mix the large batches, which can damage the rubber’s molecular structure and can harm the quality of the final compound. The quality decreases with extended mixing time and finally negatively affects the physical properties of the final product. As a matter of fact, a larger mixer is economi- cally beneficial due to its higher output rates, but following the principle of quality as a priority, a middle-sized mixer should be the first choice to put quality over quantity.

latest company news about Differences and options for rubber equipment  0latest company news about Differences and options for rubber equipment  1

Despite the similarities of both internal mixers, each ma- chine provides certain benefits that make it more suit- able for one production step than another (for a detailed overview see table 1). The Banbury is the superior mixer for masterbatch production with its high-performance engine, adjustable rotor speed, and automated weigh- ing system. High degrees of dispersion and mixing high viscosity rubber can be achieved within a short time frame. Since the Banbury operates at higher temperatures than the Kneader, it is not the best solution for mastication and finalization, although it is possible. The higher temperature of the Banbury is compensated by a shorter mixing time. However, there are certain advantages to favor the Kneader over the Banbury.


Selecting the right mixer for the respective production step and its correct operation requires a lot of experience; using both mixers can be a huge advantage.

latest company news about Differences and options for rubber equipment  2

The rolling mill consists of two parallel, counter rotating rolls with a gap in between that can be adjusted. The roll- ing mill can be used for all steps of the mixing process. For the masterbatch production other compounding ingredi- ents are added into the rubber. The extremely high shearing forces of the rolling mill at a low temperature lead to su- perior dispersibility of the ingredients, but unlike the inter- nal mixers with their sealed chambers, the rolling mill is an open mechanic system and the raw materials would scatter.

This would create a dusty and unsafe production environ- ment, which is a strong argument for the use of internal mix- ers. Additionally, a longer mixing time reduces the efficiency of the rolling mill and it is therefore most commonly used for sheeting, which will be described in the following section.




Pub Time : 2022-04-11 14:52:31 >> News list
Contact Details
Qingdao Running Machine CO.,LTD

Contact Person: Mr. LEE

Fax: 86-532-83197554

Send your inquiry directly to us (0 / 3000)