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Feeding unit for feeding plastic film

A technology for feeding and plastic materials, which is applied in the field of feeding units, can solve the problems of large stress of packaging film, loss of accuracy of sheet positioning and orientation, etc., and achieve the effects of increasing output, simple manufacturing, and improving positioning accuracy

Pending Publication Date: 2022-01-11
PLUSLINE SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to meet the production rate of the packaging machine, shorter sheets are subjected to higher accelerations, which puts excessive stress on the packaging film and may also cause a loss of precision in the positioning and orientation of the sheet on the lifter

Method used

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  • Feeding unit for feeding plastic film
  • Feeding unit for feeding plastic film
  • Feeding unit for feeding plastic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Simplified to the basic structure of the feed unit and with reference to the accompanying drawings, the feed unit (UG) according to the invention for feeding plastic film in a packaging machine specially configured for packaging rolls of paper comprises:

[0023] - a unit (1) for unrolling the plastic film (F) from the corresponding roll (2);

[0024] - a cutting device (3) arranged downstream of the unrolling unit (1) with respect to the direction followed by the film (F);

[0025] - a conveying device (4) arranged downstream of the cutting device (3);

[0026] - A positioning device (5) located downstream of the conveying device (4).

[0027] The unrolling unit (1) comprises a pair of horizontal unrolling rollers (10, 11) defining a nip (N) through which the film (F) passes and the unrolling rollers (10, 11 ) are motorized in a suitable manner so as to exert a dragging action on the film in cooperation with each other which unwinds the film itself from the roll (2)....

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Abstract

A feeding unit (UG) for feeding a plastic film in packaging machines, comprising: a unit (1) for unwinding the film from a reel (2); a cutting device (3) downstream of the unwinding unit (1) and intended to form sheets (SF) of predetermined length; a transfer device (4) downstream of the cutting device (3); a positioning device (5) downstream of the transfer device (4) and comprising drive belts (50, 51) able to engage the upper and the lower faces of the film. The belts of the positioning device are controlled by a control unit (UE) connected with optical means (OC) that detect the passage of signs (T) formed on the film (F). The control unit (UE) is programmed to compare a transit time elapsing during the passage of the signs (T) of a same side of two consecutive sheets (SF) with a cycle time and to increase or decrease the speed of said belts (50, 51) if the transit time is less than or greater than the cycle time.

Description

technical field [0001] The invention relates to a feed unit for feeding plastic film in a packaging machine, in particular but not exclusively for packaging rolls of paper. Background technique [0002] EP1584558A1 discloses a unit for feeding and cutting a web of packaging material to length. [0003] US6067780 discloses an automatic machine for packaging products such as rolls of paper using a packaging sheet which is wrapped and folded around the product and sealed on itself. [0004] In packaging machines of the above-mentioned type, the packaging is carried out by sequentially feeding individual products or groups of products along a forming line in which the products pass beforehand through a series of operating stations in which In each of the operating stations specific operations are performed to obtain the desired packaging. [0005] Usually, in each station of an automatic machine for packaging products, such as paper rolls, the following steps are carried out: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H23/188B65B41/18
CPCB65H23/1882B65B41/18B65H2801/81B65B41/12
Inventor 维托里奥·格里
Owner PLUSLINE SRL