Granulation external lubricant adding system and method

Abstract

The invention relates to a granulation external lubricant adding system, and belongs to the field of resin synthesis. The system comprises a liquid storage tank, a liquid level meter, a metering pump, a valve, a pipeline and an electrical control cabinet which are arranged on a same base, and the liquid storage tank is used for storing a liquid external lubricant and is connected with a mineral oil storage tank through a mineral oil pump; the liquid level meter is used for monitoring the liquid level in the liquid storage tank and is arranged on the liquid storage tank; the pipeline is communicated with the liquid storage tank and a granular material air conveying pipe; the metering pump is used for quantitatively pumping the liquid lubricant and is arranged on the pipeline; and the electrical control cabinet is used for controlling the system and is communicated with the liquid level meter and the metering pump. The invention further provides a granulation external lubricant adding method which is applied to the system. The liquid lubricant is adopted to replace a powdery lubricant, so that the appearance of product particles is improved, the production cost is reduced, and the product processing efficiency is improved; and meanwhile, dust pollution is reduced, and environmental protection and emission reduction are facilitated. The system provided by the invention is compact in structure, small in occupied area and easy to install.

Description

technical field [0001] The invention relates to the field of resin synthesis, in particular to a system and method for adding lubricant outside granulation. Background technique [0002] High molecular polymers such as synthetic resins usually have a high viscosity after melting. During processing, when the molten high polymer is granulated through narrow slits, gates and other runners, the polymer melt must be in contact with the processing. Friction occurs on the mechanical surface, and some friction is very unfavorable to the processing of polymers. These frictions reduce the fluidity of the melt, and severe friction can make the surface of the film rough, lack luster or flow lines. For this reason, it is necessary to add additives for the purpose of improving lubricity, reducing friction, and reducing interfacial adhesion performance. Lubricants can be divided into two types: external lubricants and internal lubricants. The function of external lubricants is mainly to i...

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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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