A kind of granulation external lubricant adding system and method

Abstract

The invention relates to an external lubricant addition system for granulation, which belongs to the field of resin synthesis. The system includes: a liquid storage tank, a liquid level gauge, a metering pump, a valve, a pipeline, and an electrical control cabinet, which are arranged on the same base. storage tank; the liquid level gauge is used to monitor the liquid level in the liquid storage tank, and is arranged on the liquid storage tank; the pipeline communicates with the liquid storage tank and the pellet air supply pipe; the metering pump is used for The quantitative pumping liquid lubricant is arranged on the pipeline; the electrical control cabinet is used to control the system and communicates with the liquid level gauge and the metering pump. The present invention also provides a method for adding an external lubricant to granulation, which is applied to the above system. The invention adopts liquid lubricant to replace powder lubricant, improves the appearance of product particles, reduces production cost, and improves product processing efficiency; meanwhile, reducing dust pollution is beneficial to environmental protection and emission reduction. The system provided by the invention has compact structure, small footprint and easy installation.

Description

technical field [0001] The invention relates to the field of resin synthesis, in particular to a system and method for adding an external lubricant to granulation. Background technique [0002] High-molecular polymers such as synthetic resins usually have high viscosity after melting. During processing, when the molten polymer is granulated through runners such as slits and gates, the polymer melt must be mixed with the processing. The mechanical surface produces friction, some of which are detrimental to the processing of polymers. These frictions reduce the melt fluidity, and severe friction can cause the film surface to become rough, lack luster or flow lines. To this end, it is necessary to add additives for the purpose of improving lubricity, reducing friction, and reducing interfacial adhesion properties. Lubricants can be divided into two types: external lubricants and internal lubricants. The function of external lubricants is to improve the friction between the pol...

AI Technical Summary

Problems solved by technology

[0004] 1. Product quality problems: First, the addition process will cause the powdery external lubricant to scatter and lose, and the actual amount added will be less than the formula amount; second, in the packaging process, some external lubricants in the granules that are fed into the packaging machine in the initial silo Due to the weak adhesion, it will fall off and accumulate under the double action of gravity and friction between the particles, resulting in too much external lubricant in the initial packaging, and less addition in the subsequent normal packaging.

A small amount of the above-mentioned external lubricants will affect the lubrication effect

In addition, there is also the fact that the powder external lubricant adheres to the surface of the pellets and affects the appearance of the product. Users will mistake the powder external lubricant for product powder during unpacking and use, and for benzene products, they will also mistake it for poor transparency;

[0005] 2. Environmental issues: First, in the feeding process, part of the powdery wetting agent will be dispersed into the atmosphere of the workshop, and second, the process of removing powder by the dust removal equipment before the material enters the silo will also take away part of the powdery wetting agent , which will cause harm to the surrounding environment and workers;

[0006] 3. Increased cost: Because the above-mentioned feeding and dust removal process will cause flying loss of powdery wetting agent, powdery wetting agent is a fine chemical, and the price is generally higher, so the cost of the product increases

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