Plastic Thermoforming: Separating Scrap from the Main Part

In the thermoforming of plastic products, there are several reasons why the main part might not separate correctly from the scrap:

• Inadequate Cutting: If the cutting is not done precisely, the main part might remain attached to the scrap.
• Inappropriate Material: Some thermoplastic materials may have properties that make separation difficult, so choosing the right material for the specific process is crucial.
• Mold Design: It’s crucial to plan for part removal during the mold design phase to avoid any separation issues later on.
• Temperature Control: Uneven or inadequate temperatures during the thermoforming process can cause deformations that make it difficult to separate the part from the scrap. It is essential to:
• Maintain a uniform temperature across the entire surface of the plastic sheet to avoid bubbles, weak spots, or deformations.
• Heat gradually to avoid thermal shocks that could compromise the material’s integrity.
• Use temperature sensors and automatic control systems to continuously monitor and adjust the temperature during the process.
• Use a cooling system to prevent overheating and, after forming, consolidate the part into the desired shape.
• Pressure and Vacuum: Inadequate control of pressure and vacuum during the process can affect the quality of the forming and consequently the ease of separating the part.