Cutting tool for putty cartridge nozzles

Abstract

The invention relates to a cutting device for cutting nozzles of cartridges in a reproducible manner. The cutting device has a housing with a cutting edge on one face and an opening on the other face; the cartridge is inserted through the opening and the nozzle of the cartridge is cut at the cutting edge by means of a rotation.

Description

[0001] 24-0936

[0002] 1

[0003] Cutting tool

[0004] The present disclosure relates to a cutting device for cartridges.

[0005] The disclosure relates equally to a cutting device for cartridges and / or a method for reproducibly adjusting the outlet size of cartridges.

[0006] Many production processes involve several steps where highly viscous materials, such as adhesives or fillers, need to be applied. These often need to be mixed first.

[0007] Static mixers are typically used for this purpose. The cartridges and mixing mechanism of a static mixer can be purchased separately and assembled on-site. To make the cartridges suitable for various applications and materials, the outlet is designed to be conical or stepped. The outlet is cut at different steps or positions of a cone to achieve different outlet sizes. This is usually done with a knife or scissors.

[0008] When cutting with a knife or scissors, the outlet is compressed, which can lead to an oval deformation. Furthermore, the reproducibility of the outlet geometry is not guaranteed. This is particularly problematic when the cartridge is mounted in a system and the material being processed moves in two directions beneath the cartridge. This can result in varying material thicknesses when applied in these two directions. Uneven material thicknesses due to inaccurate cartridge outlets lead to rejects.

[0009] EP1172154A2 describes a mixer for two-component attachment elements which has a cuff whose inner surface can be plugged into the outer bottle of the cartridge's nozzle in a sealing manner, so that the outlets can be exchanged and manufactured specifically for the application.

[0010] In light of this prior art, one objective of the present disclosure is to provide a device and a method that provides cartridges with consistently shaped outlets. In particular, the objective of the disclosure is to provide a device and a method for reproducibly cutting cartridge outlets.

[0011] The problem is solved by the features of the independent claims. The dependent claims contain further developments of the disclosure. 24-0936

[0012] 2

[0013] According to one aspect of the disclosure, the problem is solved by a cutting device (1) for cartridge outlets with a housing (6), wherein the housing (6) has a cutting edge (2) on one side of the housing (6) and a passage (5) on the other side for inserting an outlet of a cartridge, and wherein the cutting edge (2) is arranged on a radial plane (3) perpendicular to the longitudinal axis (4) of the housing (6) and a stop (7) is axially spaced from the cutting edge (2) on the inside of the housing (6).

[0014] Likewise, according to one aspect of the disclosure, the problem is solved by a method in which a cartridge with its outlet is pushed into a cutting device until a stop (7) is reached. Then the cutting device (1) or the cartridge is rotated, or the cartridge and cutting device (1) are simultaneously rotated in opposite directions to each other.

[0015] According to one aspect of the disclosure, the housing (6) is cylindrical. The cylindrical or slightly conical shape advantageously allows for the guidance of the cartridge outlet and thus ensures a straight cut.

[0016] According to one aspect of the disclosure, the stop (7) is a radially inwardly projecting projection. In general, cartridge outlets are conical, at least in the immediate vicinity of the tip. A stop of a cutting device according to the invention can therefore also be designed with a correspondingly adapted conical area. However, cartridge outlets can also have a stepped area near the tip. This allows the user to cut the tip at different steps. In the cutting device (1), a stop (7) can be adapted to the steps of a cartridge. The stop (7) of a cutting device guarantees cutting at the same location on the outlet and thus reproducibility in generating a consistently sized opening.

[0017] According to one aspect of the disclosure, the housing (6) is designed in two parts. A first part (8) comprises the passage (5) for inserting a cartridge outlet and the stop (7), and a second part (9) comprises the cutting edge (2). A two-part design allows the cutting device to be adjusted to different lengths between the stop (7) and the cutting edge (2). This enables the outlets of identical cartridges with different opening positions and sizes to be cut. The first part (8) and second part (9) of the cutting device (1) are detachably connected to each other at a connection point (10) according to 24-0936.

[0018] 3

[0019] For example, by means of a screw connection, a plug connection, a bayonet connection or another detachable connection.

[0020] According to one aspect of the revelation, a set comprising at least two first parts (8, 81) with a passage (5) for introducing an outlet of a cartridge with a stop (7, 71) and a second part (9) with a cutting edge (2) is provided, wherein each first part 8 or 81 is detachably connectable to the second part (9) and wherein first parts 8 and 81 have different lengths between cutting edge (2) and stop (7, 71).

[0021] According to one aspect of the disclosure, the cutting edge (2) is arranged at an angle W° of 0.5 to 3°, preferably 1°, to the radial plane (3). An angled arrangement of the cutting edge (2) improves the cut.

[0022] According to one aspect of the disclosure, the cutting edge (2) is recessed into the housing (6). For manual use of the cutting device (1), recessing the cutting edge (2) is advantageous for user safety, as it prevents accidental cutting. In automatic applications, recessing the cutting edge (2) also provides advantageous protection against accidental cutting when handling the device, for example, when replacing cartridges.

[0023] According to one aspect of the disclosure, the casing (6) is made of aluminum or plastic.

[0024] According to one aspect of the revelation, the procedure includes the following steps:

[0025] Inserting an outlet of a cartridge into a passage (5) of the cutting device (1)

[0026] Rotating the cartridge or the cutting device (1), or the cartridge and cutting device (1) simultaneously in opposite directions to each other. When the cartridge is inserted into the cutting device (1) with its outlet, the cutting edge (2) rests against the cartridge outlet at the point to be cut. Each cartridge outlet of the same cartridge rests against the cutting edge (2) in the cutting device (1) in the same position. This ensures a reproducible cut. A circumferential cut is produced by rotating the outlet against the cutting edge (2). This can be achieved by rotating the cartridge in the fixed cutting device (1). It can also be achieved by rotating the cutting device (1) around the fixed cartridge. Another possibility is to rotate the cartridge in one direction and the cutting device (1) in the opposite direction. 24-0936

[0027] 4

[0028] According to one aspect of the disclosure, the procedure is carried out manually. For this purpose, the cartridge is held in one hand of the user and the cutting device (1) in the other hand. The outlet of the cartridge is inserted into the cutting device (1) until a stop (7) is reached, and the cartridge or the cutting device (1), or the cartridge and the cutting device (1), are simultaneously rotated in opposite directions relative to each other.

[0029] According to one aspect of the disclosure, the process is carried out in an automated machine. The cartridge is fixed in an automated machine, for example, one that later applies the material from the cartridge to the product being manufactured. Before production begins, the cartridge is moved to the cutting device (1), and the outlet is inserted into the opening of the cutting device (1) until a stop (7) is reached. The cartridge or the cutting device (1) can then be rotated. The use of the cutting device (1) in the automated machine simplifies the production process. Cartridges in the production of, for example, motor vehicles, must be replaced regularly because they wear out quickly. A consistent size and dimension of the cartridge outlet opening is advantageous for the quality of the final product.Specifically, when the product is moved two-dimensionally under the cartridge or the cartridge is moved two-dimensionally above the product, uniform material thicknesses are ensured even in the corners during the dispensing of the viscous material in the cartridge.

[0030] The advantage is that identical cartridges can be used for different applications requiring varying outlet opening sizes, ensuring a reproducible and consistent result. This reduces the production cost of the final product.

[0031] The cutting device (1) is advantageously used in the manufacture of motor vehicles. Static mixers are used here for the application of adhesives and gap fillers. The desired nozzle diameters are matched to ensure the appropriate volume can be dispensed within the cycle time.

[0032] One embodiment of each is described below with reference to the figures.

[0033] Fig. 1 shows a cutting device (1) with a view of the cutting edge (2);

[0034] Fig. 2 shows a schematic view of the cutting device (1) with a view of the cutting edge (2);

[0035] Fig. 3 shows a cross-section of the cutting device (2); and 24-0936

[0036] 5

[0037] Fig. 4 shows a set with a second part (9) and three first parts (8, 81 , 82) schematically superimposed.

[0038] Figure 1 shows a cutting device 1 with a view of the cutting edge 2 according to one aspect of the disclosure. The cutting device according to Figure 1 has a cylindrical housing 6. On one side of the housing 6 is a passage 5 for inserting the outlet of a cartridge. On the opposite side is the cutting edge 2. The cutting edge 2 is located in a radial plane 3. The radial plane 3 is perpendicular to the longitudinal axis 4 of the housing 6. On the opposite side of the radial plane 3 is a passage 5 for inserting the outlet of a cartridge. The cutting edge 2 is recessed in the radial plane 3 and does not project beyond the radial plane 3.

[0039] Figure 2 shows the same cutting device 1 in a schematic view. On the upper side, the cutting edge 2 is visible in the radial plane 3. One side of the cutting edge 2 extends into the center of a longitudinal opening along the longitudinal axis 4. On the opposite side is the opening 5 for inserting the outlet of a cartridge. On the inside of the cylindrical housing 6, a stop 7 is implemented as a projection that extends radially inwards.

[0040] Figure 3 shows a cross-sectional view of the cutting device. The cutting edge 2 is visible on the upper side in the radial plane 3. One side of the cutting edge 2 extends into the center of a longitudinal opening along the longitudinal axis 4. On the opposite side is the opening 5 for inserting the outlet of a cartridge. On the inside of the cylindrical housing 6, a stop 7 is implemented as a projection that extends radially inwards. Further radially inward-projecting projections 7a and 7b are also visible. These are optional and form the counterpart to a stepped cone. With a three-stepped stop as shown in Figure 7, the cartridge is guided particularly securely in the cutting device.

[0041] Figure 4 schematically shows a cutting device 1 in which the housing 6 is in two parts. The first parts 8, 81, 82 each comprise a passage 5 for inserting a cartridge outlet and each a stop 7. The second part 9 comprises the cutting edge 2. The first parts 8, 81, 82 and the second part 9 are detachably connected to each other in 10, for example by means of a screw connection, a plug connection, or a bayonet connection.

[0042] In a first part 8 there is a first attack 7, in another first part 81 there is another first attack 71 and in another first part 82 there is another first attack 72 24-0936

[0043] 6 realized. All three first parts 8, 81 and 82 are schematically superimposed in Figure 4 to illustrate the differences.

[0044] Stop 7 has a different distance to cutting edge 2 of the second part 9, marked here as length JE, as stop 71, cutting edge 2 of the second part 9, marked here as FE, and both have a different distance to cutting edge 2 of the second part 9 as stop 72, marked here as GJ. In a set, the first part 9 is grouped together with the three second parts 8, 81, and 82.

[0045] In Figure 4, angle W° is also marked, indicating that the cutting edge 2 lies in the radial plane 3.

[0046] 24-0936

[0047] 7

[0048] Reference symbol (part of the description)

[0049] 1 Cutting device 2 Cutting edge

[0050] 3 radial plane

[0051] 4 Longitudinal axis

[0052] 5 Passage for inserting the outlet of a cartridge

[0053] 6 Housing 7, 7a, 7b Stop

[0054] 8, 81, 82 Part One

[0055] 9 Part Two

[0056] 10 liaison point

[0057] W° angle

Claims

24-0936 8 Claims 1. Cutting device (1) for cartridge outlets with a housing (6), wherein the housing (6) has a cutting edge (2) on one side of the housing (6) and a passage (5) on the other side for inserting an outlet of a cartridge, and wherein the cutting edge (2) is arranged on a radial plane (3) perpendicular to the longitudinal axis (4) of the housing (6) and a stop (7) is axially spaced from the cutting edge (2) on the inside of the housing (6).

2. Cutting device (1) according to claim 1, wherein the housing (6) is cylindrical.

3. Cutting device (1) according to one of claims 1 or 2, wherein the stop (7) is a radially inwardly projecting projection.

4. Cutting device (1) according to one of claims 1 to 3, wherein the housing (6) is two-part and a first part (8) comprises the passage (5) for inserting an outlet of a cartridge and the stop (7) and a second part (9) comprises the cutting edge (2).

5. Cutting device according to one of claims 1 to 4, wherein the cutting edge (2) lies at an angle W° of 0.5 to 3° in the radial plane (3).

6. Cutting device (1) according to one of claims 1 to 5, wherein the housing (6) is made of aluminium.

7. Cutting device (1) according to one of claims 1 to 5, wherein the housing (6) is made of plastic.

8. Method for cutting outlets of a cartridge with the following steps: Inserting an outlet of a cartridge into a passage (5) of a cutting device according to one of claims 1 to 7 Rotating the cartridge or the cutting device (1) or the cartridge and cutting device (1) simultaneously in opposite directions to each other 9. Method according to claim 7, wherein the cartridge is mounted in a machine and the cutting device (1) is rotated. 24-0936 9 10. Set comprising at least two first parts (8, 81) with a passage (5) for inserting an outlet of a cartridge with a stop (7, 71) and a second part (9) with a cutting edge (2), wherein each first part 8 and 81 is detachably connectable to the second part (9) and wherein the first parts 8 and 81 have different lengths between the cutting edge (2) and the stop (7, 71).

Images