When it comes to guaranteed spring travel, the guide length should be greater than half of the spring's free length. This ensures proper alignment and smooth operation. The installation of the spring must be parallel with both the upper and lower mounting surfaces of the replacement mold spring. The front end of the self-shaft and the socket opening should be chamfered, while care must be taken to avoid creating a large chamfer at the bottom of the hole. When replacing or repairing mold springs, only one or a few springs should be replaced at a time. Mixing old and new springs can lead to uneven load distribution, causing some springs to bear excessive load and fail prematurely.
It is essential to prevent the inclusion of iron filings, scrap metal, or other debris in the spring. These contaminants can reduce the effective number of coils, leading to increased stress and potential damage to the spring. To avoid this, the mold should be opened after each production cycle for cleaning. Never mix or alter springs without proper consideration. Springs are designed and manufactured to perform optimally under specific conditions. During mold maintenance, if standard springs are modified due to the unavailability of suitable replacements—such as cutting, grinding inner or outer diameters, or using springs in series—it may compromise the original performance characteristics, ultimately resulting in early spring failure.
In addition, always follow the manufacturer’s specifications when handling or replacing springs. Using incorrect or non-standard components can significantly affect the overall performance and lifespan of the mold. It is also recommended to keep a stock of properly sized and rated springs to avoid last-minute modifications that could jeopardize the integrity of the system. Regular inspections and maintenance can help identify potential issues before they lead to costly failures. By maintaining strict control over spring selection, installation, and maintenance, you can ensure consistent performance and extend the life of your molds and springs.
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