Heat sealing device suitable for narrow seal of packaging machine

Abstract

The invention discloses a heat sealing device suitable for a narrow seal of a packaging machine. The heat sealing device comprises a pair of hollow stepped shafts which are arranged in parallel and can rotate circumferentially around the axis thereof, wherein each stepped shaft is provided with a coaxial heating tube in a penetration manner; when the stepped shafts rotate, the heating tubes are stationary; a heating part is arranged at one end of each heating pipe; a heat-seal wheel is fixedly sleeved at the end part of each stepped shaft and corresponds to the heating part; and when the heating pipes generate heat, the heat can be radiated to the heat-seal wheels on the peripheries of the stepped shafts. When the stepped shafts rotate, the heating pipes arranged in the stepped shafts in apenetration manner can radiate heat to the heat-seal wheels arranged on the stepped shafts; When the stepped shafts rotate, the heat generating tube can be kept stationary, thus, easy-to-wear structures such as conducting rings are not needed, the mutual friction and wear among various components are reduced, the electric appliance and circuit structures of the heating part are simplified, the manufacturing cost and the maintenance workload are also greatly reduced.

Description

technical field [0001] The invention relates to the technical field of heat-sealing packaging, in particular to a heat-sealing device suitable for narrow sealing of packaging machines. Background technique [0002] In the field of packaging technology, heat sealing technology is a widely used packaging sealing technology, which is widely used in daily chemical product packaging, food and drug packaging and other fields. The main method is to use heat to seal the material to make it reach a viscous flow state, and then pressurize it to make it sticky and sealed. Generally, it is completed with a heat-press sealing device or a heat-press sealing machine. [0003] Wherein the heat-sealing head is the actuator for heat-sealing, and the heat-sealing head needs to supply power to the heating device in the heat-sealing head during the heat-pressing process. Since the heat-generating device rotates together with the heat-sealing head, Conductive rings are connected to ensure proper...

AI Technical Summary

Problems solved by technology

The material of the conductive ring requires high mechanical strength, is a good conductor of electricity, and has corrosion resistance. When it is in sliding contact with the brush, it must have wear resistance and stable sliding contact characteristics. The manufacturing cost is relatively high, and During long-term operation, friction will be generated due to high-speed rotation, resulting in accelerated wear of parts. In addition, a conductive slip ring circuit also has a high requirement for insulation. Insulation problems and leakage lead to a relatively large amount of after-sales, which greatly increases operating and maintenance costs

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