Automatic thin film replacing machine for plastic bag production

Abstract

The invention discloses an automatic thin film replacing machine for plastic bag production. The automatic thin film replacing machine comprises a frame, upper and lower unrolling devices and upper and lower storage devices are arranged on the frame, the upper and lower unrolling devices enable automatic erection of upper and lower thin film rolls at operating positions, and the upper and lower storage devices are used for storing upper and lower thin films released from the upper and lower unrolling devices. A fixing device is arranged between each unrolling device and the corresponding storage device and capable of fixedly clamping a thin film between the two devices to prevent the thin film from moving forwards. When each fixing device fixedly clamps the thin film, the corresponding storage device continuously conveys the thin film stored in the storage device to realize plastic bag production. A cutting device for cutting off the film is arranged between each fixing device and thecorresponding unrolling device, a welding device is arranged between each cutting device and the corresponding fixing device and used for hot-melting pressing and welding of thin films of two adjacentthin film rolls, and in a replacing process, the thin film stored in each storage device is continuously conveyed outwards to realize continuous uninterrupted production.

Description

【Technical field】 [0001] The invention relates to a film automatic refilling machine for producing plastic bags. 【Background technique】 [0002] The plastic bag is generally formed by hot-melting and pressing two upper and lower films. The inner side of each film is usually made of PE material, and the outer side is made of PA material. The hot-melt weldability of PE is used to facilitate the heating of the upper and lower films. Melting and pressing. In production, when a roll of film is unloaded, it is generally necessary to stop the machine, manually replace another new roll of film in the working position, and connect the films of the front and rear film rolls together before continuing to start production , therefore, need stop to wait, and production efficiency is low. Moreover, since the upper (layer) film is PE facing downward and PA facing upward, it is necessary to turn over the end of the cut-off side of the front film when changing the material, so that the con...

AI Technical Summary

Problems solved by technology

In production, when a roll of film is unloaded, it is generally necessary to stop the machine, manually replace another new roll of film at the working position, and connect the films of the front and rear film rolls together before continuing to start production , therefore, it is necessary to stop and wait, and the production efficiency is low

Moreover, since the upper (layer) film is PE facing downward and PA facing upward, it is necessary to turn over the end of the cut-off side of the front film when changing the material, so that the connecting end PE faces upward, and then place the rear film to be connected The downward facing PE surface is thermally welded with the upward facing PE surface after the front film is folded. The process is complex and requires multiple workers to cooperate with manual refueling. The efficiency is low and the cost is high.

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