CN-122008425-A - Efficient mixing process method for improving dispersion uniformity of sizing material

Abstract

The invention provides a high-efficiency mixing process method for improving the dispersion uniformity of sizing materials, which realizes the rapid and uniform dispersion of small materials in the sizing materials by controlling the synergistic effect of mixing parameters and physical pressure in stages. The process comprises the steps of (1) feeding rubber, (2) closing a feeding door, (3) increasing the rotating speed of a mixing mill to 50 revolutions per minute for high-speed dispersion, (4) maintaining a high-speed dispersion state for free mixing, and (5) pressing an upper top bolt to further promote dispersion by using pressure. Compared with the traditional process, the invention perfects two process steps, aims at occupying time, dispersing the small materials as soon as possible, and melting the small materials into the rubber as soon as possible, avoiding agglomeration of the small materials in the process or agglomeration of the small materials in dead corners of an internal mixer, causing uneven mixing of the agglomerated small materials and the rubber, solving the hidden quality trouble, and not increasing any cost.

Inventors

• WANG SAIHUI
• HONG PAN
• GE HAIJIAN

Assignees

• 物产中大欧泰有限公司

Dates

Publication Date

20260512

Application Date

20260320

Claims (4)

1. 1. The high-efficiency mixing process method for improving the dispersion uniformity of the sizing material is characterized by comprising the following steps of: (1) Feeding glue; (2) Closing the charging door; (3) The rotation speed of the mixer is increased to 50 revolutions per minute to carry out high-speed dispersion; (4) Maintaining a high-speed dispersion state for free mixing; (5) The upper plug is depressed and pressure is used to further promote dispersion.
2. 2. The process according to claim 1, wherein in the high-speed dispersion step, the initial rotation speed is 45 rpm and the step-wise increase is carried out to 50 rpm.
3. 3. A process according to claim 1 or 2, wherein the time of the free mixing step is controlled to be 5 seconds to ensure adequate incorporation of the pellets into the gum material.
4. 4. A process according to any one of claims 1 to 3, wherein the step of pressing down the upper plug is carried out by a pressure system built into the mixer to enhance the binding of the small pieces to the sizing material.

Description

Efficient mixing process method for improving dispersion uniformity of sizing material Technical Field The invention relates to the technical field of rubber processing, in particular to a high-efficiency mixing process method for improving the dispersion uniformity of rubber materials. Background In the production process of rubber products, mixing is a key process of uniformly dispersing various compounding agents (such as small materials of vulcanizing agents, accelerators, fillers and the like) in raw rubber or plasticated rubber. The traditional final rubber mixing process adopts ① rubber feeding ② closing charging door ③ pressing top bolt. The traditional method is easy to agglomerate the small materials, and is not beneficial to further dispersion of the small materials and the sizing materials. Therefore, developing a mixing process method capable of effectively improving the dispersion uniformity of the sizing material has important significance for improving the overall quality of rubber products. Disclosure of Invention In view of this, the invention provides a high-efficiency mixing process method for improving the dispersion uniformity of sizing materials, To solve the problem of uneven dispersion caused by small powder caking. In order to achieve the above purpose, the present invention adopts the following technical scheme: a high-efficiency mixing process method for improving the dispersion uniformity of sizing materials comprises the following steps: (1) And (3) a rubber feeding step, namely firstly, adding a preset amount of raw rubber or plasticated rubber into a mixing chamber of a mixing machine, and preparing for mixing operation. (2) Closing the charging door, namely closing the charging door of the mixing mill after confirming that the sizing material is accurately placed, ensuring that the material cannot leak in the mixing process, and simultaneously maintaining the necessary pressure environment in the mixing chamber. (3) And in the stage of increasing the rotating speed, starting the mixing mill, initially setting the rotating speed to 45 rpm, and gradually increasing the rotating speed to 50 rpm after the equipment runs stably. The key of the step is that the strong shearing force generated by high rotating speed is utilized to promote the small materials to rotate and disperse in the sizing material rapidly, so that the phenomenon of small material agglomeration is effectively avoided, and a foundation is laid for subsequent uniform mixing. (4) The free mixing stage is to keep the high rotation speed of 50 rpm for 5 seconds, and is called free mixing stage. During this time, the small material is sheared and rubbed sufficiently in the high-speed rotating sizing material, accelerating the process of blending into the sizing material, and enabling the sizing material and the small material to form a uniform mixture preliminarily. (5) And in the pressing-up stage, after the free mixing is finished, the mixer is immediately operated to press down the upper plug, and the sizing material is further compressed and sheared by utilizing the pressure applied by equipment, so that the step is beneficial to eliminating possible micro bubbles, enhancing the binding force between the small material and the sizing material, and ensuring that the final dispersion of the small material in the sizing material reaches a highly uniform state. Compared with the prior art, the invention has the following technical effects: Compared with the traditional process, the invention perfects two process steps, aims at occupying time, dispersing the small materials as soon as possible, and melting the small materials into the rubber as soon as possible, avoiding agglomeration of the small materials in the process or agglomeration of the small materials in dead corners of an internal mixer, causing uneven mixing of the agglomerated small materials and the rubber, solving the hidden quality trouble, and not increasing any cost. Drawings In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art. FIG. 1 is a defect chart of a sizing material in the conventional process; FIG. 2 is a graph showing the effect of uneven dispersion of a sizing material in the conventional process; FIG. 3 is a graph showing the effect of the improved process of the invention. Detailed Description The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but