Cutting device, winding device and cutting method

Abstract

The present invention provides a cutting device, a winding device and a cutting method. The cutting device is suitable for being installed on a winding device (A) by means of a winding film (F), more precisely on an object winding device (A), in particular a pallet (P). It comprises a heat-activated cutting element (11) for cutting the film (F), and a main support element (12) for supporting the film (F) near the heat-activated cutting element (11). In addition, the cutting device (10) also comprises: a secondary support element (13) for supporting the film (F) near the heat-activated cutting element (11); the secondary support element (13) is placed in a position so that the heat-activated cutting element (11) is placed between the main support element (12) and the secondary support element (13), thereby avoiding contact between the heat-activated cutting element (11) and the film.

Description

Technical Field

[0001] The present invention relates to a cutting device and method for cutting packaging film. The cutting device is intended to be installed on a stretch wrapping machine, in particular on a stretch wrapping machine for packaging objects such as trays or other objects requiring a hot-cut film device. Background Art

[0002] A pallet is basically a flat structure, usually made of wood, on which goods are placed to simplify storage and transportation. However, the "tower" of goods stacked on top of a pallet is not only unprotected but also often quite unstable.

[0003] To solve the above problems, a pallet wrapping machine is now used. Specifically, the wrapping machine wraps an elastic and extensible film around the pallet and the goods, which can wrap and shape the goods and stably fix the goods.

[0004] There are different types of pallet wrapping machines to meet the diverse production needs of your business. Automatic wrapping machines not only automatically wrap the packaged goods but also independently cut the final edge of the film at the end of the wrapping process and then weld it. Therefore, they are often placed at the end of the production line, directly connected to the machine that palletizes the products.

[0005] In this type of wrapping machine, the cutting is performed by a cutting device equipped with supporting and cutting elements that stretch the wrapping film and hold it in place.

[0006] It is particularly noteworthy that traditional wrapping machines use an electrically heated resistance wire that cuts the wrapping film according to a preset line as it comes into direct contact with the wrapping film.

[0007] However, this cutting technique allows possible residue to remain on the wire and, as it accumulates, reduces its cutting ability, necessitating the replacement of the wire.

[0008] Furthermore, the direct contact between the hot wire and the wrapping film gives off an odor which is very unpleasant to the operator during the cutting operation.

[0009] Taking into account the above mentioned circumstances, it is obvious that the drawbacks listed above do not only concern existing pallet wrapping machines, but more generally all wrapping devices that cut the wrapping film by direct contact thermal cutting methods.

[0010] Therefore, it is desirable to improve existing wrap film cutting devices, as well as existing wrapping devices using wrap film or film remaining on objects (e.g. pallets); in particular, it is desirable to provide a solution that can ensure high cutting performance and long-term continuous and effective operation. Summary of the Invention

[0011] An object of the present invention is to improve existing cutting devices for winding devices.

[0012] Another object of the present invention is to provide a set of high-performance cutting devices with high cutting capacity and good cutting effect.

[0013] Yet another object of the present invention is to provide a cutting method and a cutting device capable of maintaining high cutting capacity and efficiency over time.

[0014] A further object of the present invention is to provide a technical solution making it possible to extend the operating life of the cutting device.

[0015] A further object of the present invention is to provide a technical solution for film cutting which is capable of suppressing or at least significantly reducing the unpleasant odors generated during the cutting operation.

[0016] The above objects and other advantages are achieved according to the cutting device and cutting method specified in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The invention may be better understood with reference to the accompanying drawings, which illustrate it in an exemplary and non-limiting embodiment, and in which:

[0018] Figure 1 is a perspective view of a cutting device according to the present invention;

[0019] Figure 2 yes Figure 1 A perspective view of a cutting device with a wrap film to be cut placed on the cutting device;

[0020] Figure 3 yes Figure 2 A top view of

[0021] Figure 4 It is installed on the pallet wrapping device equipped with a pallet Figure 1 Perspective view of the cutting device. DETAILED DESCRIPTION

[0022] The general features of the invention will be illustrated by means of exemplary and non-limiting embodiments in the appendix below.

[0023] With reference to the accompanying drawings, the cutting device 10 will be described below.

[0024] The cutting device 10 is mounted on the device A and is used to wrap objects, especially to wrap a pallet P on the device A, through a film F. Figure 4 shown.

[0025] Of particular note is the configuration of the apparatus A for wrapping a pallet P with an elastic wrapping film F.

[0026] refer to Figure 1 and Figure 2 The cutting device 10 provides a heat-activated cutting element 11 for cutting the stretch film F in a clear and precise manner.

[0027] The cutting device 10 comprises a main support element 12 for supporting the film F. The main support element 12 is located at the proximal end of the cutting element 11 .

[0028] In addition, the cutting device 10 has a secondary support element 13 for supporting the film F at the proximal end of the cutting element 11 .

[0029] It is particularly noteworthy that the secondary support element 13 is designed to enable the cutting element 11 to be placed between the primary support element 12 and the secondary support element 13; Figure 2 As shown, the two have corresponding portions of outer surfaces 14, 15 that together define a support plane, within which the film F lies during the cutting operation. For example, the support elements 12, 13 can be return rollers. According to other versions (not shown), the support elements 12, 13 can consist of round steel, profiled steel, or other desired elements.

[0030] The support elements 12 and 13 are designed to prevent the film F from coming into contact with the cutting element 11. In other words, the cutting device 10 according to the present invention can ensure that the film F and the cutting element 11 are kept at a distance.

[0031] refer to Figure 1 The cutting element 11 has a longitudinal development axis Y1 that is parallel both to the longitudinal development axis Y2 of the primary support element 12 and to the longitudinal development axis Y3 of the secondary support element 13. In this way, the support plane is parallel to the cutting element 11. For example, the cutting element 11 can be tensioned by means of heat-activated wires 16, 17.

[0032] also, Figure 3 As can be more clearly seen in the figure, the cutting element 11 is positioned at a distance d from the support plane. Once the heat-activated cutting element 11 becomes incandescent, it cuts the film F by thermal radiation. In this manner, the cutting operation is performed without direct contact between the cutting element 11 and the film F. This configuration prevents residue from accumulating on the cutting element 11 and reducing its cutting performance.

[0033] like Figure 2As shown, the extent to which the cutting element 11 extends along the longitudinal development axis Y1 is at least equal to the width L of the film F along this axis Y1, so that the film F can be completely cut in a single cutting operation. In the same way, the extent to which the supporting elements 12 and 13 extend longitudinally along the longitudinal development axes Y2 and Y3, respectively, is at least equal to the width L of the film F along the axes Y2 and Y3, so that the film F can be supported along its entire width on the supporting elements 12 and 13 and thus lie within the aforementioned support plane.

[0034] Thanks to the features described above, the cutting device 10 not only has a high cutting capacity and efficiency, but also ensures that this cutting capacity remains effective over time, thereby extending the operating life of the cutting element 11. In addition, since contact between the film F and the heat-activated cutting element 11 is avoided, the generation of unpleasant odors during the cutting operation is suppressed or at least significantly reduced.

[0035] As shown above, it is obvious that the cutting device according to the present invention successfully achieves all the aforementioned preset objectives.

[0036] The description and illustrations in the accompanying drawings are provided for the purpose of illustrating the innovative functions of the cutting device.

[0037] In practice, the various materials can be appropriately selected according to the requirements and the state of the art, provided they are compatible with the specific application and the respective individual components. Modifications and / or additions may be made to the descriptions and illustrations in the drawings.

Claims

1. A cutting device (10), adapted to be mounted on a winding device (A) for winding an object with a winding film (F), the cutting device (10) comprising: a heat-activated cutting element (11) for cutting the film (F); A primary support element (12) for supporting the film (F) at the proximal end of the heat-activated cutting element (11), characterized in that the cutting device (10) further comprises: a secondary support element (13) for supporting the film (F) at the proximal end of the heat-activated cutting element (11), the secondary support element (13) being positioned so that the heat-activated cutting element (11) is placed between the primary support element (12) and the secondary support element (13), thereby avoiding contact between the heat-activated cutting element (11) and the film (F).

2. The cutting device (10) according to claim 1, wherein The primary support element (12) and the secondary support element (13) each have a corresponding portion (14, 15) of an outer surface, which together define a support plane, inside which the film (F) lies during the cutting operation.

3. The cutting device (10) according to claim 2, wherein: The primary support element (12) has a primary longitudinal development axis (Y2), and the secondary support element (13) has a secondary longitudinal development axis (Y3), and the primary longitudinal development axis (Y2) and the secondary longitudinal development axis (Y3) are parallel to each other.

4. The cutting device (10) according to claim 3, wherein: The heat-activated cutting element (11) has another longitudinal development axis (Y1) parallel to the main longitudinal development axis (Y2) and the secondary longitudinal development axis (Y3), corresponding to the main support element (12) and the secondary support element (13), respectively.

5. The cutting device (10) according to claim 4 or claim 3, wherein: The heat activated cutting element (11) is parallel to the support plane.

6. The cutting device (10) according to claim 5, wherein The heat-activated cutting element (11) is placed at a distance (d) from the support plane, so that during operation, thermal radiation cutting of the film (F) can be achieved because the configuration of the heat-activated cutting element (11) can cut the film (F) without direct contact with the film.

7. The cutting device (10) according to claim 3, wherein The extent to which the primary support element (12) and the secondary support element (13) extend longitudinally along their respective primary longitudinal development axes (Y2) and secondary longitudinal development axes (Y3) is at least equal to the width (L) of the film (F) along the primary longitudinal development axes (Y2) and the secondary longitudinal development axes (Y3), so that the film (F) is supported on the primary support element (12) and the secondary support element (13) along its entire width.

8. The cutting device (10) according to claim 4, wherein The extent of the heat-activated cutting elements (11) along the respective further longitudinal development axes (Y1) is at least equal to the width (L) of the film (F) along the further longitudinal development axes (Y1), thereby achieving complete cutting of the film (F) in a single cutting operation.

9. The cutting device (10) according to claim 1 or 2, wherein: The primary support element (12) and the secondary support element (13) are return rollers, round steel or profiled steel.

10. The cutting device (10) according to claim 1 or 2, wherein: The heat-activated cutting element (11) is a heat-activated metal wire.

11. The cutting device (10) according to claim 10, wherein The heat-activated cutting element (11) is tensioned by tensioning means (16, 17).

12. A wrapping device (A) for a pallet (P) using a wrapping film (F), characterized in that: Said winding means (A) comprises a cutting device according to any one of the preceding claims.

13. A method for cutting a film (F) of a pallet (P) by means of a heat-activated cutting element (11), comprising the steps of: - at the end of the wrapping of the film (F) on the pallet (P), placing the first portion of the film (F) on the main support element (12), proximal to the heat-activated cutting element (11), - supporting a second portion of said film (F) on a secondary support element (13), proximal to said heat-activated cutting element (11), - thermally activating the heat-activated cutting element (11) to perform cutting due to the thermal effect of the film, wherein: The secondary support element (13) is pre-configured so that the heat-activated cutting element (11) is positioned between the primary support element (12) and the secondary support element (13), and During the cutting operation, the heat activated cutting element (11) and the film (F) are kept separate from each other.

14. The cutting method according to claim 13, wherein: The cutting operation is achieved by heat radiation generated by the heat-activated cutting element (11) on the film (F), and the film (F) and the heat-activated cutting element (11) are spaced apart.

Images