DE3031391A1 - AUTOMATIC BAG EMPTYING MACHINE - Google Patents

Description

Automatic bag emptying machine

The present invention relates to an automatic one Machine for emptying sacks.

It is known that the sack emptying machines currently on the market have the sack to be emptied at one end cut open and the contents are removed by tapping and / or shaking. The machines of the above Type have some shortcomings. In fact, the knocking action that has the task of To rid the sack of its contents, a considerable amount of dust, which is important for environmental hygiene and in the long term is also harmful to the organs of the machine itself. In addition, said tilting and / or vibrating elements produce considerable noise, which is another serious nuisance to persons' health.

It is also known that with the system currently in use described above, there is always a certain residual amount remains in the sack which is either lost or manual intervention by an operator to retrieve it requires.

130012/0687

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The aim of the present invention is to develop an automatic machine for emptying sacks (made of paper, Polyethylene, fabric, etc.); the product in the sack in both dust and grain form empties without knocking; the said emptying process is carried out in such a way that the sack is cut open and the Product is uncovered and tipped over so that basically the sack is removed from the product instead of as usual to get the product out of the sack.

Another goal is that the machine - since it does not require any clapping elements or shaking processes - is quiet and generates little dust during operation, while at the same time allowing the residual amount of the product to be kept in this way as much as humanly possible.

Another goal is that the machine because of its basic principle allows high hourly outputs (up to 500 bags per hour) to be achieved, with the specific Operating costs are low.

Further objects and advantages will emerge from the following description and the accompanying drawings, which schematically and in exemplary form an embodiment of the Invention explained.

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130012/0687

With reference to said drawing, the

Fig. 1 is a side view of the machine which is the subject of the present invention;

Fig. 2 is a front view near the cutting knives.

The machine consists of a metallic structure 1, shown in section in the figures, in order to make it work of the basic elements and can be loaded by hand or with a conveyor belt synchronized with it will.

The sack, which is guided by the rollers 3 and 4 into the machine on the conveyor belt 2, lifts a belt 5 which is connected to an electrical sensor that triggers all subsequent operations and regulates the access of the following sacks. The sack, which slides forward on the belt 2 in its longitudinal direction, is made to ^{hook on the chains 6 and 6 1} , which are equipped with a series of steel nails for the purpose of pulling the sack after the knives and thereby in one correct position. The named chains 6 and 6 ¹ with the S.tahlnägeln engage in the roller 4 and slide on appropriately shaped guide bushes: the guide bush 7 of the chain 6 is shown in the figure.

1 3 0 0 VlJ 0 6 8 7

The sack is cut open by a pair of horizontal circular knives 8 and 8 "which are opposite to each other and in the opposite direction compared to the forward sliding of the sack Rotate direction; Each of the mentioned knives is mounted on the shaft 9, which is driven by the motor 10 is driven.

The cutting of the sack begins with the knives ajar (position A and A ¹ ) so that the front head of the sack is completely cut open; after cutting the front head of the sack, it lifts the belt 11 connected to an electric sensor that activates the hydraulic winch 12 and opens the knives (position B and B ¹ ) by sliding the respective motors on the guide 13 In this way, the cut continues along the flanks of the sack up to the back of the head, which is only partially cut open.

When the sack has been cut, the belt 11 lowers again and thus allows the knives 8 and 8 ^{1 to} approach each other again for the cut of the next sack. The cut sack slides further forward: the lower half sack, held in place by the nails of the steel nail chain 6 and the guide 14, is turned upside down, while the upper half sack is lowered and comes to rest on the holding device 15.

130012/0687

If you slide further forward, the lower half-sack is guided to the exit, while the upper half-sack on the Holding device 15 slides and is then hooked onto the steel nail chain. At this stage the content of the sack is tipped into the funnel 16.

The open, inverted sack, cut in half lengthways, is held by the nails of the steel nail chain suspended by means of pulling rod 17 and pulled by carrier belt 18 to the exit. Deflated in this last phase the sack completely absorbs its contents because of gravity. Finally, the belts 18 lead it to the ejector rollers 19 and 20, where it can be removed for reuse.

The present invention, explained and described schematically and in example form, is to be understood in such a way that it can be extended to all associated variants which, as such, fall within their scope.

130012/0687

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Claims (4)

Reference: Your message from Applicant: Comav S.r.l., Pieve di Cento (Bologna), Via Provinciale Centese n.37, Italy Patent claims f 1.J Automatic bag emptying machine, d u r c h characterized in that the forward movement of the sack takes place with a conveyor belt, the conveyor chain follow, on which a number of nails is provided, to which the sack is hooked and of which it is in one correct position is maintained. Telephone: Lindau (083 82) 6917 05 4374 2. Automatic sack emptying machine according to claim 1, characterized in that the The process of cutting open the sack is carried out with a pair of rotating horizontal circular knives, which are designed so that the sack in the longitudinal direction over its entire circumference in two halves suidaät: with ansaatae of the rear part of the head ^ § _cTleokkonto . by agreement Bayer. Vereinsbank Lindau (B! No. 120 8578 (BLZ 735 200 74) Mönchen 295 25-809 130012/0687 3. Automatic bag emptying according to claims 1 and 2, characterized in that the cut-bag is further pulled by the steel nail holder chain and so upset that ^7, the upper bag edge, which rests on a relevant retaining device, complete opening and emptying allows the bag. 4. Automatic sack emptying machine according to the claims 1, 2 and 3, characterized by the fact that the cut and emptied sack by means of a The pull-out rod is unhooked from the nail carrier chain and removed for reuse. 130012/0687