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¶ The deformation of an 80°C heat-resistant plastic after being dried in a 70°C dryer for 6 hours could be caused by the following reasons:
Uneven Heating (Applicable to deformation issues in material drying trays and model annealing)
• Explanation: The temperature distribution in the drying equipment may be uneven, causing certain areas of the plastic to overheat and undergo localized softening or deformation.
• Details: The temperature control system in the dryer may fluctuate, causing certain areas to exceed 70°C, which can push the plastic beyond its temperature tolerance limits.
Long Exposure to Heat Leading to Plastic Softening (Applicable to material drying trays and model annealing deformation issues)
• Explanation: The heat resistance of plastics refers to the maximum temperature they can withstand over a short period, but prolonged exposure to heat—even below the heat resistance limit—can cause the material to slowly soften and deform.
• Details: The 80°C heat tolerance typically refers to short-term performance, but prolonged exposure at 70°C can cause the plastic to become softer or undergo stress relaxation (especially in crystalline plastics).
Internal Stress Release (Applicable only to model annealing, not material drying trays)
• Explanation: Residual internal stress from the molding process may be released during high-temperature heating, causing deformation.
• Details: In injection molding or extrusion molding, rapid cooling or uneven cooling can induce internal stress within the plastic. During heating, these stresses can redistribute, leading to warping or deformation of the material.
Moisture Absorption (Applicable only to model annealing, not material drying trays)
• Explanation: Certain plastics (such as nylon and PET) are hygroscopic. When heated, the moisture within the material evaporates, which can cause deformation.
• Details: During the drying process, moisture escaping from the plastic leads to uneven volumetric changes. If the drying temperature is too high or the time is too long, the surface of the material may shrink or warp.
¶ How to Reduce Plastic Deformation
Ensure Temperature Uniformity:
• Check the drying machine’s temperature control system to ensure even temperature distribution and avoid localized overheating.
Lower the Drying Temperature:
• Try lowering the drying machine’s temperature and extending the drying time to avoid prolonged exposure to the plastic’s temperature limit.
Control Drying Time:
• Do not expose the plastic to temperatures close to its temperature limit for extended periods. 6 hours may be too long for some plastics, so shorten the time appropriately.
Check Material Type:
• Confirm the true temperature resistance and drying requirements of the material (e.g., some plastics may require low-temperature drying over an extended period).
¶ Health Tips — Caring for Your Health: FusRock Recommends You
1. For long-term and extensive use of 3D printing materials, it is recommended to operate in a dedicated room with proper ventilation.
2. If you have a history of allergies, make sure that the material you are using will not cause any allergic reactions upon contact.
3. For individuals with respiratory conditions or chronic illnesses, please wear a mask to protect your health. Even if you do not have any related conditions, it is strongly recommended to wear a mask during operation.
4. When sanding, cutting, or performing other actions on fiber-based printed products, which may release fibers, be sure to take protective measures to prevent injury or inhalation.
5. Lastly, we recommend keeping children and infants away from the printing area during operations to ensure a safe environment for the next generation.
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