Technical Analysis and Applications of Chengda Machinery's Flanging Machine

As an innovative packaging equipment, Haining Chengda Machinery Co., Ltd.'s flanging machine achieves a breakthrough improvement in the leak-proof performance of paper cups by integrating multiple precision processes. Below is a systematic analysis from three dimensions: technical principles, functional advantages, and application scenarios.

I. Technical Principles and Process Flow

• Precision Milling and Positioning High-precision cutting tools perform micron-level cutting on the paper material edges, ensuring flatness and consistency in the seam area. This provides a standardized working surface for subsequent gluing.
• Smart Gluing System A spraying module equipped with a visual positioning device precisely applies food-grade hot melt adhesive to the pre-set seam area. The adhesive layer thickness is controlled within a $\pm 0.1\text{ mm}$ error margin by a dynamic flow control system, balancing bonding strength with environmental friendliness.

II. Core Performance Advantages

• Composite Barrier Structure The PE (low-density polyethylene) coating and cellulose substrate form a gradient interface with a contact angle of $>110^{\circ }$. This effectively blocks the penetration of polar/non-polar liquids such as coffee tannins and carbonated solutions.
• Mechanical Reinforcement Design The double-layer composite structure increases the radial compression strength of the cup body by 40%, meeting the requirements for holding $80^{\circ }\text{C}$ hot beverages. Its anti-deformation capability surpasses traditional waxed products.
• Sustainable Manufacturing System Compared to a full plastic liner solution, PE usage is reduced by 60%, and it is compatible with FSC-certified pulp raw materials. The equipment's modular design supports rapid changeovers within 8 hours, with a production capacity of 6,000 pieces/hour (for $\varphi 90\text{ mm}$ standard cup type).

III. Expanded Application Scenarios

• Food Service Sector

  • Coffee Chain Brands: Addresses issues of brand image damage caused by latte art cup leakage.
  • Fast Food Industry: Suitable for packaging carbonated beverages containing citric acid ($\text{pH}<3.5$) and high-grease soups.

• Industrial Packaging Sector

  • Automotive Lubricant Repackaging: Withstands SAE 5W-40 grade oils for 72 hours without leakage.
  • Pesticide Formulation Packaging: Complies with GB 3796 agricultural packaging sealing standards.

• New Consumption Scenarios

  • Baked Grease Products: Can hold shortening and chocolate sauce with a melting point of $\le 45^{\circ }\text{C}$.
  • Cold Chain Packaging: PE film maintains flexibility at $-18^{\circ }\text{C}$, preventing freezing cracks.