Bayonet mechanism for outer tube of telescopic straw and working method thereof

A telescopic straw outer tube bayonet mechanism and working method thereof relate to a continuous automatic bayonet molding device, especially the technical field of a plastic stretch-contracted straw outer tube safety bayonet molding mechanism. The length direction of the main shaft of the present invention is sequentially arranged with the first flange, the receiving roller, the heating plate, and the cylindrical cam plate. The heating plate is embedded with a precision guide sleeve, and the heating plate on the side close to the cylindrical cam plate is fixedly connected with the radial limit The forming needle parallel to the main shaft is respectively inserted on the precision guide sleeve and the radial limit disc. One end of the forming needle is connected to the cylindrical cam disc, and the other end of the forming needle is connected to the bayonet cutter disc; the cylindrical cam disc is connected to the Spindle connection. The invention achieves the purposes of simple structure, fast forming speed, reducing production cost and improving production efficiency. V91 inch O prison 01 CNIO2038416A Claim 1/1 page 1. A telescopic straw outer tube bayonet mechanism, characterized in that the first flange (1) and the connection are arranged in sequence along the length direction of the main shaft (14) The material roller (2), the heating plate (8), the cylindrical cam plate (6), the heating plate (8) is inlaid with a precision guide sleeve (12), and the heating plate (8) on the side close to the cylindrical cam plate (6) is fixed Connected to the radial limit disc (10), the forming needle (11) parallel to the main shaft (14) is respectively inserted on the precision guide sleeve (12) and the radial limit disc (10), one end of the forming needle (11) It is connected with the cylindrical cam disc (6), the other end of the forming needle (11) is connected with the bayonet cutter disc (13); the cylindrical cam disc (6) is connected with the main shaft (14) through the bearing (7). 2. The bayonet mechanism for the outer tube of the telescopic straw according to claim 1, characterized in that the side of the heating plate (8) close to the receiving roller (2) is fastened by a second flange (3) and mounted on On the spindle (14). 3. The bayonet mechanism for the outer tube of the telescopic straw according to claim 2, characterized in that the second flange (3) and the heating plate (8) clamp an insulation ring (4), the insulation ring ( 4) A through hole matched with the precision guide sleeve (12) is provided on it. The bayonet mechanism for the outer tube of the telescopic straw according to claim 1, characterized in that the outer periphery of the heating plate (8) is provided with a heating ring (5) whose axis is parallel to the main shaft (14). 5. The bayonet mechanism for the outer tube of the telescopic straw according to claim 1, characterized in that the radial limit block (9) is provided with a radial limit disc (10) on one side close to the cam cylindrical disc (6), forming The needle (11) passes through the radial stop block (9). 6. The bayonet mechanism of the telescopic straw outer tube according to claim 1, characterized in that the molding needle (11) is embedded on the cylindrical cam disc (6) through a cam bearing, and the circumference of the cylindrical cam disc (6) is arranged with the cam bearing Matching grooves. 7. The working method of the bayonet mechanism of the telescopic straw outer tube based on claims 1 to 6, characterized in that the main shaft (14) is first driven to rotate by the transmission mechanism, and drives the first flange (1) and the second The flange (3) starts to rotate together, the first flange (1) drives the receiving roller (2) to rotate, and the second flange (2) drives the heating plate (8) to rotate; after the heating plate (8) rotates , Drives the precision guide sleeve (12) and the radial limit block (9) to start to rotate around the main shaft (14). With the rotation of the precision guide sleeve (12), the forming needle (11) starts to rotate around the main shaft (14), And expand and contract according to the curve on the grooved cylindrical cam disc (6)