Utility Model Patent: A Rotary Clamping Mechanism for a Packaging Machine

The “Rotary Clamping Mechanism for Packaging Machines,” independently developed by Hunan Fumaco Food Engineering Technology Co., Ltd. (Utility Model Patent No.: ZL 201520716984.3), was filed on September 16, 2015, and officially authorized by the National Intellectual Property Administration on January 13, 2016. The successful approval of this patent represents authoritative recognition of the company’s strong R&D capabilities in core functional components for packaging machines, highlighting the company’s innovative focus on deepening its expertise in food packaging equipment and perfecting its automated supporting system for rotary-type packaging production lines.

This patent addresses the core pain points of traditional packaging machine turntable clamping mechanisms, including asynchronous opening and closing of grippers, poor clamping stability, easy detachment and skewing of bags, low coordination efficiency among multiple stations, and high failure rates during high-speed operations. It innovatively adopts an integrated structural design featuring “cam-driven linkage plus circumferential array grippers,” enabling an automated and highly precise upgrade of the turntable clamping process. The mechanism is equipped with a high-precision rotary turntable at its core, around which multiple sets of gripper assemblies are evenly arranged in a circular pattern. Through the coordinated action of coaxial cams and connecting rod transmission mechanisms, all gripper assemblies are driven to perform their opening and closing movements synchronously, ensuring that the clamping force and rhythm across different stations remain highly consistent. This effectively resolves the issues of motion lag and coordination disruptions commonly encountered in conventional multi-drive clamping mechanisms. The grippers feature a symmetrical elastic clamping structure, with flexible anti-slip pads installed on the inner side. These pads not only enhance the frictional grip between the grippers and the bags, preventing bag detachment during high-speed rotation, but also minimize compressive damage to the bags, thereby safeguarding the integrity of the packaged product’s appearance.

The integrated optoelectronic position sensor and travel limit module can detect the rotary table’s rotation angle and the gripper’s opening and closing status in real time, enabling precise control of the gripping timing and ensuring seamless coordination between the gripper and preceding processes such as bag feeding and filling. Key transmission components feature precision bearings and a high-strength synchronous transmission structure, significantly enhancing the mechanism’s operational stability and positioning accuracy, thereby guaranteeing stability and service life even under high-speed operation.

The parts that come into contact with materials and packaging bags are all made of food-grade stainless steel, with a polished surface that leaves no sanitary dead spots. Additionally, these components feature modular disassembly and assembly capabilities, making cleaning and maintenance exceptionally convenient and fully compliant with the clean production requirements of the food industry. By adjusting the opening and closing stroke of the gripper jaws, the device can flexibly accommodate the clamping needs of packaging bags of various specifications, offering excellent compatibility.

This technological achievement significantly enhances the efficiency and reliability of rotary table clamping, reduces labor-intensity costs, and further strengthens the company’s technical foundation in the core components of rotary-table packaging machines. It provides food processing enterprises with a highly efficient, precise, and reliable automated rotary table clamping solution, thereby supporting the full-process automation upgrade and market expansion of packaging production lines.