Plastic packaging hose floating extrusion sealing device

Abstract

The invention discloses a device for sealing a plastic packaging hose in a floating mode through squeezing. According to the device for sealing the plastic packaging hose in the floating mode through squeezing, guide shafts and a supporting plate are fixed together, bearing seats located on a front sealing head and on a rear sealing head are in clearance fit with the guide shafts, the front sealing head and the rear sealing head are connected with a piston rod of a double-shaft cylinder and a cylinder block of the double-shaft cylinder respectively, the other end of the piston rod of the double-shaft cylinder is fixed to a tail yoke plate, the middle of a crank is hinged to a supporting plate, the two ends of the crank are respectively hinged to an end connecting rod, the other ends of the two end connecting rods are hinged to the cylinder block of the double-shaft cylinder and the tail yoke plate respectively, blocking shoulders are arranged on the inner walls of a group of through holes formed in the front sealing head, a guide column is arranged in each through hole, the rear end of each guide column is connected with a check ring, a floating sealing block is fixed to the front end of each guide column, each guide column is sleeved with a spring, and the two ends of each spring abut against the corresponding floating sealing block and the corresponding blocking shoulder respectively. According to the device for sealing the plastic packaging hose in the floating mode through squeezing, automatic attaching and alignment between the sealing surfaces of the floating sealing blocks and the sealing surface of the rear sealing head are achieved after press fit, automatic compensation for unbalanced squeezing force is achieved through the elastic force of the springs, and thus sealing gaps and sealing pressures of the sealing positions of all sections of the sealing heads are made uniform and consistent.

Description

technical field [0001] The invention relates to a sealing device in packaging equipment, in particular to a plastic packaging hose floating extrusion sealing device. Background technique [0002] Plastic packaging hoses made of low-density polyethylene are currently widely used in beverage packaging. An existing sealing device has a double-axis cylinder, a pair of heads, a support plate and a pair of guide shafts. The pair of guide shafts are parallel to each other, and one end of them is fixed to the support plate. A pair of bearing seats fixed on the top are respectively matched with a guide shaft in clearance, and the two heads are respectively connected with one end of the piston rod of the double-axis cylinder and the cylinder body of the double-axis cylinder, and the other end of the piston rod of the double-axis cylinder passes through The supporting plate is fixed with a tail connecting plate. The middle part of a crank is hinged with the upper end of the supporting...

AI Technical Summary

Problems solved by technology

The existing sealing device can complete the continuous sealing process for each group of heat-melted packaging tubes, but due to the small deviation of the piston rod of the double-axis cylinder during the movement, thus It will cause inconsistent force on the packaging hose at both ends of the head, which will cause some packaging hoses to be sealed weakly, or the sealing surface of the sealing surface of the packaging hose is not clear, and the appearance is inconsistent, which affects product quality.

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