In refrigerator production lines, the foaming mold is the core component of the molding process. Its sealing strip not only plays the role of heat preservation and sealing, but is also an important factor in determining whether the foaming effect is uniform. However, under high temperature, high pressure and frequent opening and closing working environments, the mold sealing strip is prone to aging, deformation, cracking and other problems, which directly affect product quality and production efficiency.
So, how to maintain the sealing strip scientifically and extend its service life? The following is a systematic analysis for you:
1. Regular maintenance: lubrication to extend service life and reduce friction noise
In order to keep the sealing strip running smoothly for a long time, it is recommended to add an appropriate amount of lubricating oil to the sealing strip every 2 to 3 months, especially in the parts where the sealing strip repeatedly contacts the mold cavity. High-quality lubrication can not only reduce friction and noise, but also effectively delay the aging of rubber materials.
2. Clean thoroughly to avoid dirt that exacerbates aging
During use, if you find oil stains on the surface of the mold limiter arm, pin or connecting bracket, you should clean it in time and re-apply grease. Otherwise, these accumulated impurities will easily aggravate the wear of the sealing strip, causing local aging or even breakage.
3. Timely replacement: aging sealing strips affect the sealing of the mold
Once the sealing strip is obviously aged, damaged or loses its elasticity, it must be replaced immediately. Aged sealing strips cannot effectively seal the mold, which can easily lead to refrigerant leakage, uneven foaming, and blistering edges of products. Long-term use of aged sealing strips will also cause obvious wind noise and friction sounds, affecting the appearance and process consistency of the product.
4. Tracing the cause of aging: reducing wear and tear from the source
The aging of the sealing strip is often caused by a humid environment, accumulation of residues or natural aging of the rubber. Especially when it has not been cleaned for a long time, deep dirt will accelerate the hardening and even mold of the sealing strip. It is recommended to use an oxygen-cleaning soaking agent for deep cleaning every week, and use dental floss to clean the gaps. Avoid using hard objects such as steel wool to scratch the rubber.
5. Storage and maintenance suggestions: Apply silicone oil + ventilate and dry
If production is suspended or the mold is stored for a long time, a small amount of food-grade silicone oil can be applied to the surface of the sealing strip. This not only plays a waterproof role, but also effectively prevents the rubber from cracking. After cleaning, the sealing strip should be placed in a ventilated and cool place to dry naturally, or use cold air to blow dry the gap, and avoid deformation caused by direct sunlight or hot air baking.
Kesimpulan
Although the mold seal is small, it is related to the stability of the entire refrigerator foaming process and the quality of the final product. Standardized cleaning and maintenance procedures can not only extend the life of the mold, but also improve product yield and reduce the rework rate. For every manufacturing company that attaches importance to production efficiency and quality control, reasonable management of the seal is to protect the production line.