Machine for washing and/or sterilizing supplying-batching devices

In a machine for washing and/or sterilizing supplying-batching devices, an enclosing structure has supporting means for a supplying-batching device to be washed and/or sterilized. Feeding ducts are to be connected to a hopper of the supplying-batching device for feeding washing fluids. Working devices are to be connected to batching means and to supplying means of the supplying-batching device, and are to be operated to reproduce working operation of the batching means and supplying means, so as to perform working cycles with said washing fluids fed to the hopper.

FIELD OF THE INVENTION

The present invention relates to filling of containers, in particular squeezable tubes, with paste products and the like. In particular, the invention relates to a machine for washing and/or sterilizing supplying-batching devices.

DESCRIPTION OF THE PRIOR ART

At present, there are apparatuses for automatic filling the squeezable tubes with batched quantities of paste products and subsequent closing the tubes.

These apparatuses generally include a feeding station, equipped with a device for supplying and batching the paste product.

An apparatus of this type is described in the document EP 1.170.210.

According to this known solution, the supplying-batching device includes substantially a hopper, which is fed with the product to be batched and from which the product is sent to batching means, for example, a syringe.

The syringe batching means communicate, via suitable valve means, with nozzle supply means for filling tubes, which are supplied with the opening turned upwards.

One of the problems occurring with the above apparatuses is connected with washing and/or sterilizing the supplying-batching device each time the product to supply is changed or in other similar circumstances.

At present, such operation includes, besides stopping the machine and removal of the whole supplying-batching device, disassembling of all working means making up the device.

Then, the disassembled working means are washed and/or sterilized, usually in an autoclave, and subsequently, assembled again, in order to reconstruct the supplying-batching device, which is mounted onto the apparatus for filling and closing tubes and the production resumes.

The washing and/or sterilization of the supplying-batching device is obviously difficult and requires relatively long time, as well as the necessary manpower, which increases the production costs.

SUMMARY OF THE INVENTION

The main object of the present invention is to resolve the above problem, by proposing a machine, which performs automatically the washing and/or sterilization of the supplying-batching devices, without dismantling the working means of the supplying-batching devices.

Another object of the present invention, resulting from the main one, is to propose a machine, whose constructive concept is simple, working reliable and use versatile.

The above mentioned objects are obtained in accordance with the contents of the claims, by a A machine for washing and/or sterilizing supplying-batching devices including a hopper, batching means and supplying means, the machine including:

a structure with a receiving station:

supporting means situated inside the structure for supporting a supplying-batching device to be washed and/or sterilized;

feeding means each time connected to said hopper of said supplying-batching device for feeding washing fluids thereto;

working means situated inside the structure and connected to said batching means and supplying means of said supplying-batching device, said working means being operated for reproducing working operation of said batching means and supplying means, so as to perform working cycles with said washing fluids fed to said hopper;

a plurality of channels for discharging said washing fluids, connected to supplying means of said supplying-batching device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

With particular reference to the above Figures, the reference numeral1indicates the machine for washing and/or sterilizing of a supplying-batching device2aimed at being used with apparatuses of known type for filling containers, in particular squeezable tubes, with paste products and the like.

The supplying-batching device2includes substantially a hopper20, which is fed, in normal operation conditions, with the paste product to be batched, and which is sent to the batching means21, e.g. a syringe.

The syringe batching means21communicate, by suitable commutation valve means22, with respective supplying nozzle means23, which fill the tubes.

According to the shown example, the supplying-batching device2includes a pair of batching means21and supplying means23for filling contemporaneously two tubes.

The machine for washing and/or sterilizing the supplying-batching device2includes a structure10, in which a receiving station SR is made for the supplying-batching device2, practically reproducing the seat of the machine for filling and closing tubes, from which the supplying-batching device2has been dismantled.

The shape of the enclosing structure10is like a casing and the receiving station SR has an aperture12, made in its front part, for the introduction of the supplying-batching device2to be washed and/or sterilized.

The aperture12is closed by a suitable door, made e.g. of transparent material to allow visual check of the operation steps.

The machine sterility can be increased, when required, by providing means (not shown) on the roof of the structure10for generating a laminar flow of air directed downwards into the receiving station SR, to sterilize the atmosphere in the station.

The receiving station SR includes supporting means11for the supplying-batching device2to be washed and/or sterilized, formed substantially by a plate13, intermediate with respect to the structure10and having fastening means14for fixing stably the supplying-batching device2in the position indicated with the broken line inFIG. 1.

Feeding means30are situated inside the receiving station SR for being connected to the hopper20of the supplying-batching device2, to deliver suitable washing fluids.

Working means40,50are to be connected respectively to the syringe batching means21and to the valve means22of the supplying nozzle means23.

As it will be specified in the following, the working means40,50are operated by suitable motor means, to reproduce the usual working functions of the batching means21and supplying means23, so as to perform a series of working cycles with the washing fluids fed to the hopper20.

The feeding means30include a plurality of pipes31, having respective interception valve means32, for feeding different washing fluids, in particular water from the water system, sterile water, sterile air, steam.

The pipes31are set in communication with a feeding channel33, which is to be connected to the top of the hopper20, in correspondence to the traditional coupling means34, made in the latter and normally used in the machine for filling and closing tubes to connect the inlet channels of the paste product to batch.

The first working means40include substantially a cross bar41, situated horizontally in the lower part of the structure10and having connection means42, which are to be connected with the pistons24of the syringe batching means21.

The cross bar41is translated vertically by suitable motor means, so as to operate the above pistons24.

Suitably, the cross bar41makes the pistons24of the syringe batching means21perform a path, whose extension is bigger with respect to the maximum stroke normally performed in the tubes filling machine.

The second working means50include substantially gripping means51, which are fixed to the commutation valve means22of the supplying nozzle means23.

The gripping means51are operated to rotate angularly by suitable activating means52, preferably a respective rotating piston.

The gripping means51make the valve means22rotate by 90° during the washing step and by 180° during the sterilizing step.

The nozzles of the supplying means23are connected to respective channels53for discharging fluids used for washing.

The washing circuit includes also a channel55for supplying detergent substances, fed from small tanks56by suitable batching pumps57.

The supply channel55leads to a side of the hopper20(seeFIGS. 2 and 3).

The supplying-batching device2, in order to be washed and/or sterilized, is first removed from the machine for filling and closing tubes, then mounted inside the machine1, by fixing to the plate13of the support means11.

The different working means of the supplying-batching device2are then connected, as it has been shown previously, to the corresponding feeding means30and the working means40,50of the machine.

At this point, a series of working cycles can be performed with washing fluids fed to the hopper20of the supplying-batching device2.

Obviously, these working cycles are different in function to the kind of paste product to be removed and to the kind of washing and/or sterilizing required in relation to this product.

It is to be noted that the washing and/or sterilizing of the supplying-batching device are performed inside a closed environment, defined by the structure10of the machine, made perfectly sterile according to the regulations.

Therefore, the proposed machine fulfills the object of automatic washing and/or sterilizing the supplying-batching devices without dismantling the working means of the supplying-batching devices, which results obviously in reduction of time and man labor.

This is obtained particularly due to the fact that the machine can reproduce substantially the working functions of different working means of the supplying-batching device, in particular the syringe batching means and the nozzle supply means.

In other words, the supplying-batching device inside the machine performs a series of working cycles, which simulate the normal operation performed by the above working means, making circulate the suitable washing and/or sterilizing fluids.

These operations can be suitably increased with respect to the normal working conditions, to ensure the reaching of the required washing and/or sterilizing degree.

In particular, the pistons24of the syringe batching means21are made perform a path, whose extension is greater than the maximum stroke normally performed in the tubes filling machine and the valve means22perform a 180° rotation during the sterilizing step, greater than the rotation performed normally.

One of the prerogatives of the proposed machine lies in the fact that the working cycles can be programmed in different ways, in relation to the characteristics of the products to remove.

In practice, the machine working can be regulated according to a wide range of working modes in relation to the users' specific needs.

Obviously, traditional electronic control means allow to perform automatically the above mentioned working cycles, according to a prefixed program.

The proposed machine is also safe to use for the operators, who introduce the supplying-batching device by a suitable carriage and thus they can control the execution of the working step from outside.

It is understood that the proposed invention has been described, with reference to the enclosed figures, as a mere, not limiting example. Therefore, it is obvious that any changes or variants applied thereto remain within the protective scope defined by the following claims.