RU2295399C1 - Method for ultrasonic cleaning of equipment, parts and tools by removing burned-on polymer - Google Patents

Abstract

FIELD: processes for ultrasonic cleaning of surfaces of equipment such as extrusion heads, draw plates and so on from burned-on polymer, possibly in any branches of industry.

SUBSTANCE: method comprises steps of preparing cleaning liquid, namely at first preparing solution of acetic acid with acetic acid concentration in range 5 - 7% and the adding 2 - 3 g of chalk per 1 liter of prepared solution; cleaning desired object with use of prepared liquid at temperature 45 - 65°C for 50 - 75 min at frequency of ultrasound oscillations 33 - 35 kHz; neutralizing liquid by means of sodium carbonate solution with concentration 0.1 mol/l; washing objects in flow-through water and drying them.

EFFECT: intensified lowered-cost process for high-quality cleaning of objects from burned-on polymer without damaging surfaces of equipment, possibility for multiple use of prepared cleaning liquid at reduced labor consumption.

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Description

The invention relates to methods for ultrasonic cleaning of equipment surfaces (extrusion heads, dies) from a polymer burnout and can be used in any industries.

The technical task of the invention is to increase the cleaning efficiency of equipment, parts and tools, the intensification of the cleaning process, the ability to remove burns in hard to reach places, forming equipment without damaging the surface of the tool.

The problem is achieved in that the method of ultrasonic cleaning of equipment, parts and tools from a polymeric burn-on involves the preparation of a cleaning liquid, whereby at first a solution of acetic acid is prepared with a concentration of acetic acid of 5-7 wt.%, Then 2 g are added per 1 liter of the resulting solution chalk, objects are treated with a cleaning liquid at t = 45-65 ° C for 50-75 min and a frequency of ultrasonic vibrations of 33-35 kHz, followed by neutralization with a soda solution with a concentration of 0.1 mol / l, then the objects are washed proto pure water and dried.

The technical result consists in increasing the efficiency of cleaning equipment, parts and tools from a polymer burnout, intensifying the cleaning process, as well as the ability to remove burns in hard-to-reach places of molding equipment without damaging the surface of the tool.

The method is as follows.

A cleaning liquid is prepared, and first, a solution of acetic acid with a concentration of acetic acid of 5-7 wt.% Is prepared, then 2-3 g of chalk are added per 1 liter of the resulting solution.

The ultrasonic bath is filled with a cleaning solution to a certain level. The instrument is placed on special devices in an ultrasonic bath so that the parts do not touch the walls of the bath and are completely immersed in the cleaning liquid, include heating the ultrasonic bath. Start the equipment with the timer set for 25 minutes. The cleaning process is carried out at t = 45-65 ° C for 50-75 minutes and a frequency of ultrasonic vibrations of 33-35 kHz. Restarting the bath is carried out by the button to re-enable the timer (p.start).

The cleaned tool is removed from the bath. The remaining cleaning fluid is allowed to drain. Carefully inspect the surface of the tool. They should not even contain traces of soot and other impurities. Next, the acid is neutralized by placing objects in a soda solution with a concentration of 0.1 mol / L, then they are washed with running water and dried in a heating cabinet until the moisture is completely removed. If necessary, you can perform additional surface polishing with felt.

The method is illustrated by the following examples.

Example 1. Prepare a cleaning liquid, and first prepare a solution of acetic acid with a concentration of acetic acid of 5 wt.%, Then 2 g of chalk are added to 1 liter of the resulting solution. The cleaning process is carried out at t = 45 ° C for 50 min and a frequency of ultrasonic vibrations of 33 kHz.

Example 2. Prepare a solution analogously to example 1, but with a concentration of acetic acid of 7 wt.%, And 1 g of the resulting solution add 3 g of chalk. The cleaning process is carried out at t = 65 ° C for 75 min and a frequency of ultrasonic vibrations of 35 kHz.

In both cases, after cleaning on the surface of the equipment being cleaned, there are no traces of burnout and contamination.

When preparing a cleaning liquid with a lower concentration of acetic acid and chalk, as well as with a decrease in the frequency of ultrasonic vibrations, insufficient cleaning of the surfaces of the objects being cleaned occurs.

With an increase in the concentration of acetic acid and chalk, as well as with an ultrasound frequency of more than 35 kHz, the cleaning intensity increases, however, a partial etching of the surface of the instrument being cleaned occurs.

The proposed method of ultrasonic cleaning from a polymer burn allows you to:

- intensify the cleaning process;

- carry out high-quality cleaning from a polymer burnout without damaging the surfaces of the equipment;

- increase the life of parts;

- reuse cleaning fluid;

- reduce the cost of cleaning the tool;

- reduce the complexity of cleaning parts.

Claims (1)

The method of ultrasonic cleaning of equipment, parts and tools from a polymer burnout, including the preparation of a cleaning liquid, first, a solution of acetic acid with a concentration of acetic acid of 5-7 wt.% Is prepared, then 2 g of chalk is added to 1 liter of the resulting solution, treatment of objects with a cleaning agent the liquid is carried out at t = 45-65 ° C for 50-75 min and a frequency of ultrasonic vibrations of 33-35 kHz, followed by neutralization with a soda solution with a concentration of 0.1 mol / l, then the objects are washed with running water and dried.