How to clean two-color injection molds? What are the methods of cleaning?

After high temperature and pressure, the mold will inevitably encounter the phenomenon of rusting. The reasons for rusting of two-color injection molds are cooling water back moisture, gas corrosion from the decomposition of melt material, etc.. The usual application of lubricating oil will also produce grease and dirt, which will accumulate on the surface of the mold and also affect the quality of the products produced, so the cleaning of the mold is the key. So how to clean the two-color injection mold? The following is to introduce several cleaning methods.

1. Manual cleaning

Manual cleaning can also be said to be pure manual cleaning, is a traditional cleaning method, can clear simple dirt. However, this cleaning method has greater disadvantages, high labor costs, labor intensity, such as dead ends, blind holes, fine holes, sun pattern can not be cleaned, cleaning personnel do not pay attention to the mold surface is also easy to damage.

2. Dry ice cleaning

Dry ice cleaning, also known as cold spray, is to use the compressed air flow to push a medium, so that the medium hit the surface, so as to clean the surface or the surface treatment. So that the surface of the object to be cleaned dirt, oil, residual impurities, such as rapid freezing, thus condensing, brittle, stripped, and at the same time with the airflow to remove. Dry ice cleaning is suitable for cleaning large flat molds, such as foam molds, mold surface with jamming, corners, blind holes is not easy to clean; dry ice is a consumable material volatile, storage is more troublesome, cleaning noise; cleaning must wear protective masks, masks, glasses and other protective tools. Unlike other cleaning methods, dry ice cleaning generally does not require the removal of the injection mold from the injection press, and can be cleaned online, while other cleaning processes require the removal of the mold.

3. Ultrasonic cleaning

Ultrasonic cleaning using chemical and physical process technology for cleaning, the process can be precisely adjusted in accordance with the cleaning task. Cleaning operation is simple and does not require manual participation when working. The mold is immersed in a tank equipped with ultrasonic transducer cleaning solution, ultrasonic cleaning effect is based on the principle of cavitation, that is, the alternating effect of pressure and suction, in the suction stage to produce small bubbles, in the pressure stage small bubbles will burst, which will produce a strong liquid flow and turbulence, the dirt from the mold "blown off". Material residues and materials such as coatings, oxides, oils, etc. are carefully but efficiently removed from the surface as well as from some pits such as cooling and venting holes. In addition, the ultrasonic device can also effectively dry the mold. Ultrasonic cleaning also has certain disadvantages, cleaning is not complete, can only remove oil or rust, the noise is relatively large, the need to work with ear plugs.

4. Electrolytic cleaning

Electrolytic cleaning through electrolysis and ultrasonic combination, can completely clean the mold, thoroughly clean the mold surface Vasci, sulfide, carbon, oil, rust, etc., mold core on the dirt. Suitable for connector molds, precision gears, auto parts molds and other precision molds. Will not damage the mold itself, including the diamond corner, nibble pattern, plating, etc. The advantages are labor saving, mold maintenance efficiency improvement, reduce defective rate. Less cleaning noise and easy to operate. After cleaning, you need to do anti-corrosion.

5. Laser cleaning

Laser cleaning is based on the photophysical reaction caused by the interaction between the high-intensity beam, short pulse laser and the contaminated layer. Its physical principle is that the laser emits a beam of light is absorbed by the contamination layer on the surface to be treated, the absorption of large energy to form a rapidly expanding plasma, resulting in shock waves, shock waves make the contaminants into fragments and be removed, the width of the light pulse must be short enough to avoid the thermal accumulation of the surface to be treated to be damaged. Laser cleaning is suitable for cleaning molds with large flat surfaces that do not require high precision, such as: tire molds. Although the operation is simple, but in the cleaning of the mold must be scanning type of movement, staff labor intensity, if the mold surface has a jam, corner, blind hole is not easy to wash clean.

The above is all about how to clean two-color injection molds. Comparing these five methods, we can know that electrolytic cleaning method is relatively better and there is no damage to the mold after cleaning. In addition, you should follow the production cycle of the two-color injection mold to clean it regularly. Before cleaning the mold, you can make a cleaning plan for different parts of the mold. The attention is not to over-clean.