Orange peel texture on the product surface

In the '2079851475616104458 (vacuum forming) production process, the product exhibits the quality defect of "Orange peel texture on the product surface". The specific manifestation is that an orange-peel-like texture appears on the product surface. This defect is relatively common when processing materials such as PP, PS, PET, PVC, ABS sheets, and its occurrence conditions are usually related to the unreasonable settings of sheet heating temperature, forming pressure/vacuum level, mold temperature, and cooling time. When the "Orange peel texture on the product surface" situation is severe, it will cause a series of chain quality defects in the product in terms of appearance, dimensional accuracy, mechanical properties, etc., which not only reduces the functionality and safety of the product in use, but also directly increases the scrap rate and production cost. Therefore, this problem requires systematic diagnosis and optimization from multiple dimensions such as material selection, the status of the '2079851475616104458 machine, heating oven, mold, and vacuum/air pressure system, and sheet heating temperature, forming pressure/vacuum level, mold temperature, and cooling time.

1. Sheet temperature too low. Temperature is the core factor affecting melt fluidity and viscosity. A temperature set too high will cause the melt viscosity to decrease, insufficient melt strength, and even thermal degradation; a temperature that is too low results in poor melt fluidity and insufficient plasticization, making it impossible to fill or form smoothly. A reasonable temperature window should be optimized and determined within the recommended range according to the melting characteristics and thermal stability of the material. 2. Insufficient forming pressure. Pressure directly determines the filling ability of the melt during the forming process and the effect of conforming to the mold. Insufficient pressure results in incomplete filling and poor replication accuracy; excessive pressure may cause secondary defects such as flash and excessive internal stress. The pressure setting should comprehensively consider factors such as material viscosity, product dimensions, and mold structure. 3. Mold surface too cold. The mold is the core tool that gives the product its shape and surface quality. Unreasonable mold design, such as improper runner/gate dimensions, insufficient venting, and inadequate draft angle, will directly cause molding defects. The machining accuracy, surface treatment quality, and daily maintenance status of the mold also directly affect product quality. In terms of equipment maintenance, the regular overhaul and precision confirmation of the '2079851475616104458 machine, heating oven, mold, and vacuum/air pressure system are not in place, causing the actual operating parameters of the equipment to deviate from the process requirements, which will also become a potential inducement of the "Orange peel texture on the product surface" problem.

1. Increase the sheet temperature. When implementing adjustments, it is recommended to adopt the single-factor variable method, adjusting only one parameter at a time and fully evaluating the effect, to avoid simultaneous changes of multiple parameters making the cause of the problem untraceable. The adjustment amplitude should be small rather than large; each adjustment is recommended to be controlled within 5%~10% of the original value, and after adjustment, run stably for at least 3~5 mold cycles to observe the effect. 2. Increase the forming pressure. When implementing adjustments, it is recommended to adopt the single-factor variable method, adjusting only one parameter at a time and fully evaluating the effect, to avoid simultaneous changes of multiple parameters making the cause of the problem untraceable. The adjustment amplitude should be small rather than large; each adjustment is recommended to be controlled within 5%~10% of the original value, and after adjustment, run stably for at least 3~5 mold cycles to observe the effect. 3. Appropriately increase the mold temperature. When implementing adjustments, it is recommended to adopt the single-factor variable method, adjusting only one parameter at a time and fully evaluating the effect, to avoid simultaneous changes of multiple parameters making the cause of the problem untraceable. The adjustment amplitude should be small rather than large; each adjustment is recommended to be controlled within 5%~10% of the original value, and after adjustment, run stably for at least 3~5 mold cycles to observe the effect. In terms of material management, incoming inspection of raw materials upon arrival and in-process inspection of work-in-progress should be strengthened, and the key performance indicators of PP, PS, PET, PVC, ABS sheets should be strictly controlled to ensure the stability of molding quality from the source.

In summary, the causes of the "Orange peel texture on the product surface" problem can be attributed to the combined action of multiple factors such as Sheet temperature too low, Insufficient forming pressure. Solving this problem requires starting from aspects such as Increase the sheet temperature, Increase the forming pressure and adopting systematic governance measures. In actual production, it is recommended to establish a prevention and rapid response mechanism for this problem, and achieve stable production and continuous improvement through sheet heating uniformity and stretch ratio control.