Doubling device for packaging machinery

Abstract

The invention discloses a doubling device for packaging machinery, comprising a regulating device, two arc-shaped elastic plates and a folding device. The two arc-shaped elastic plates are connected above the regulating device; the folding device is correspondingly jointed with the elastic plates; the folding device comprises a baffle plate, pressing pieces and a paper stop sliding block, whereina folding groove is arranged between the baffle plate and the pressing pieces; the pressing pieces are fixed on the baffle plate by the paper stop sliding block and correspond to the elastic plates; a gap through which a packaging body can pass is left between the elastic plates and the baffle plate of the folding device; and the right front of the elastic plates is provided with an upper pressing wheel which prevents the packaging body from bulging. The doubling device has high work efficiency without energy consumption and can not break down easily, thereby producing less defective products. Moreover, the doubling device is suitable for all packaging bodies with various sizes and thicknesses by adjusting the length and the width of the folding groove of the folding device and the transverse and longitudinal distances of the two elastic plates.

Description

technical field

[0001] The invention relates to a device used on a packaging machine, in particular to a half-folding device used for the half-folding process of paper bags. Background technique

[0002] There is a kind of packaging such as double-fold paper bags on the market, such as envelopes, express paper bags, CD-ROM bags, etc. Their common feature is that most of these double-fold paper bags need to be coated with glue on the edges when they are processed. Glue, and then go through other processes such as folding in half. Among them, half-folding is a very important link in the whole paper bag (envelope type) processing process. At present, most of the existing half-folding processes adopt the form of pull hook type and air blowing type. The disadvantage of the prior art is that: the air blowing type requires high-pressure airflow The promotion, high energy consumption, low efficiency, easy to produce defective products, and need to install a large air pump on the pa...

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