Cutting Ro1ler for Rotary Die Cutter

Abstract

The device comprises a roller body (11) and a cutting die (20) coupled to the roller body (11) so that when the corrugated cardboard is cut, the cut portion on the inner side of the knife can be reliably separated from the remaining portion on the outer side of the knife. The above cutting die (20) comprises a base (22) coupled to the outer surface of the roller body (11), a knife (24) having a lower end fixed by being embedded in the base (22) and a blade (25) formed at the upper end, and having a shape corresponding to the shape of the corrugated cardboard (2) to be cut in order to cut the corrugated cardboard (2) into a predetermined shape, and a sheet push part (30) that applies a pushing force to the severed part (2B) so that the severed part (2B) of the corrugated cardboard (2) is separated from the remaining part (2A) of the corrugated cardboard (2) when the corrugated cardboard (2) is cut. This provides a cutting roller for a rotary die cutting device.

Description

Technology Field

[0001] The present invention relates to a cutting roller for a rotary die cutting device, and more specifically, to a cutting roller for a rotary die cutting device configured to more reliably separate the severed portion of the corrugated cardboard from the remaining portion when the corrugated cardboard is cut by a cutting roller to form holes for handles or ventilation during the packaging box manufacturing process. Background Technology

[0002] Generally, packing a certain amount of goods into a box is called box packaging. Boxes used for box packaging are manufactured from materials such as styrofoam, synthetic resin, wood, paper, cardboard, and corrugated cardboard.

[0003] Among the various boxes used for packaging, many made of cardboard and corrugated cardboard are folding boxes. Folding boxes are shipped by the manufacturer in a folded state and form their shape when used.

[0004] Folding boxes, such as corrugated cardboard boxes, are manufactured by forming holes such as handles or ventilation holes in a predetermined shape through cutting during the manufacturing process. At this time, the hole portion is cut using a cutting roller equipped with a knife on the outer surface.

[0005] Here, the cutting roller is installed to be in contact with the support roller in the middle of the conveying path of the corrugated cardboard continuously supplied from the supply section, and at the same speed as the conveying speed of the corrugated cardboard. It forms holes of a predetermined shape in the corrugated cardboard while rotating rapidly. By using a rotating cutting roller, there is no need to stop the corrugated cardboard transport, which can improve work speed.

[0006] A rotary die cutting device including such cutting rollers and supporting rollers that support them can be equipped with knives of various shapes, such as cylindrical shapes, depending on the shape of the hole.

[0007] In conventional rotary die cutting devices, the cutting rollers do not separate well from the part to be cut on the inside of the knife and a portion remains attached to the remaining part on the outside of the knife.

[0008] Therefore, since the parts to be cut are separated one by one using manpower, it leads to reduced productivity and labor shortages, causes defects in the cutting surface, reduces the corrugation preservation of the corrugated cardboard when cutting, and accelerates the wear rate of the knife.

[0009] In addition, the cutting roller of a conventional rotary die cutting device is configured to use a sponge, rubber, or cork attached to the inside of the knife to separate the part to be cut inside the knife from the remaining part outside the knife. However, this configuration has low elasticity and makes it difficult to rapidly undergo elastic deformation and recovery in accordance with the cutting speed. Consequently, it is difficult to separate the part to be cut inside the knife from the remaining part in accordance with the fast cutting speed, and the durability is weak, and the corrugations of the corrugated cardboard may be damaged as the remaining part around the part to be cut is pressed. Prior art literature

[0010] Registered Patent Publication No. 10-1421608 (July 15, 2014) Published Patent Publication No. 10-2013-0129881 (November 29, 2013) Registered Patent Publication No. 10-1431138 (August 11, 2014) The problem to be solved

[0011] The present invention is made with regard to the above points, and aims to provide a cutting roller for a rotary die cutting device configured to more reliably separate the cut portion resulting from the formation of a hole in the corrugated cardboard by ensuring that the elasticity of the sheet push portion separating the cut portion of the corrugated cardboard from the remaining portion is excellent and that the elastic deformation and recovery response are rapidly configured. means of solving the problem

[0012] The cutting roller for a rotary die cutting device proposed by the present invention comprises a roller body (11) and a cutting die (20) coupled to the roller body (11).

[0013] The above cutting die (20) comprises a knife (24) having a shape corresponding to the shape of the corrugated cardboard (2) to be cut so as to cut the corrugated cardboard (2) into a predetermined shape, with the lower end fixed by being embedded in the base (22) and a blade (25) formed at the upper end, and a sheet push part (30) that applies a pushing force to the severed part (2B) so that the severed part (2B) of the corrugated cardboard (2) is separated from the remaining part (2A) of the corrugated cardboard (2) when the corrugated cardboard (2) is cut.

[0014] The above sheet push unit (30) comprises a plurality of fixing grooves (32) formed at regular intervals in the inner portion of the base (22) where the knife (24) is supported, a plurality of cylinders (40) assembled inside each of the fixing grooves (32), a plurality of push rods (50) each having their lower portions installed to be movable up and down inside the cylinders (40), a contact head (60) installed on the upper portion of the plurality of push rods (50) and having its upper surface in contact with the severed portion (2B) of the corrugated cardboard (2), and a plurality of elastic members (70) installed inside each of the cylinders (40) and applying force to ensure that each of the push rods (50) always moves upward. Effects of the invention

[0015] According to the cutting roller for a rotary die cutting device according to an embodiment of the present invention, when a corrugated cardboard is cut, the cutting portion located on the inner side of the knife is easily separated from the non-cut portion located on the outer side of the knife, so there is no need to remove the cutting portion on the inner side of the knife by human power, thereby resolving labor shortages and improving productivity.

[0016] Furthermore, according to the cutting roller for a rotary die cutting device according to an embodiment of the present invention, the part is structured to facilitate disassembly and assembly, making replacement or repair due to part breakage or wear easy. Brief explanation of the drawing

[0017] FIG. 1 is a perspective view showing a cutting roller for a rotary die cutting device according to an embodiment of the present invention. FIG. 2 is an enlarged perspective view of a die cutter of a cutting roller for a rotary die cutting device according to an embodiment of the present invention. FIG. 3 is an exploded perspective view showing a cutting die of a cutting roller for a rotary die cutting device according to an embodiment of the present invention. FIG. 4 is an exploded cross-sectional view showing a cutting die of a cutting roller for a rotary die cutting device according to an embodiment of the present invention. FIG. 5 is a cross-sectional view showing a cutting die of a cutting roller for a rotary die cutting device according to an embodiment of the present invention. FIG. 6 is a partially enlarged cross-sectional view showing a cutting die of a cutting roller for a rotary die cutting device according to an embodiment of the present invention. FIG. 7 is an enlarged cross-sectional view of another part showing the cutting die of a cutting roller for a rotary die cutting device according to one embodiment of the present invention. FIG. 8 is a cross-sectional view showing the state in which a corrugated cardboard is cut by a cutting roller for a rotary die cutting device according to an embodiment of the present invention. Specific details for implementing the invention

[0018] Next, a preferred embodiment of a cutting roller for a rotary die cutting device according to the present invention will be described in detail with reference to the drawings.

[0019] In the following, the same reference numerals are used for technical elements that perform the same function, and repetitive detailed descriptions are omitted to avoid redundant explanations.

[0020] The embodiments described below are provided as examples to effectively demonstrate preferred embodiments of the present invention and should not be interpreted to limit the scope of the present invention.

[0021] The cutting roller for a rotary die cutting device according to the present invention is configured to cut corrugated cardboard in a predetermined pattern, such as forming a handle hole in the corrugated cardboard for packaging boxes.

[0022] A cutting roller (10) for a rotary die cutting device according to one embodiment of the present invention comprises, as shown in FIG. 1, a roller body (11) and a cutting die (20) coupled to the roller body (11).

[0023] The roller body (11) is formed in a cylindrical shape.

[0024] As shown in FIGS. 2 to 5, the cutting die (20) comprises a base (22) coupled to the outer surface of the roller body (11), a knife (24) fixed to the base (22), and a seat push part (30) located inside the knife (24).

[0025] The base (22) is made of wood and has a curved plate shape corresponding to the outer circumference of the roller body (11), and its inner surface contacts the outer surface of the roller body (11).

[0026] The lower part of the knife (24) is fixed by being embedded in the base (22), and a blade (25) is formed on the upper end.

[0027] The above knife (24) is formed in a shape corresponding to the shape of the corrugated cardboard (2) to be cut in order to cut the corrugated cardboard (2) into a predetermined shape.

[0028] For example, the knife (24) is formed in a cylindrical shape when a circular hole is formed in the corrugated cardboard (2).

[0029] The above sheet pusher (30) is characterized by easily separating the remaining part (2A) of the corrugated cardboard (2), which is located outside the knife (24), by applying a pushing force to the cutting part (2B) of the corrugated cardboard (2), which is located inside the knife (24), when the corrugated cardboard (2) is cut.

[0030] As shown in FIGS. 4 to 8, the above sheet pusher (30) comprises a plurality of fixing grooves (32) formed at regular intervals in the inner part of the base (22) where the knife (24) is supported, a plurality of cylinders (40) assembled inside each of the fixing grooves (32), a plurality of push rods (50) each having their lower side installed to be movable up and down inside the cylinders (40), a contact head (60) installed on the upper side of the plurality of push rods (50) and whose upper surface contacts the severed part (2B) of the corrugated cardboard (2) when the corrugated cardboard (2) is cut, and a plurality of elastic members (70) installed inside each of the cylinders (40) and applying force to ensure that each of the push rods (50) always moves upward.

[0031] The above fixed groove (32) is formed to penetrate the base (22).

[0032] That is, the fixed groove (32) is formed so that it penetrates the inner and outer surfaces of the base (22) formed in the shape of the curved plate.

[0033] The above fixed groove (32) is formed with a circular cross-section, for example.

[0034] A catch (38) is formed on the lower side of the above-mentioned fixed groove (32).

[0035] The above cylinder (40) is moved from the lower side to the upper side of the fixed groove (32) and assembled into the fixed groove (32).

[0036] The above cylinder (40) comprises a body (41) having a cylindrical shape with an open lower side, an upper and lower movement hole (42) through which the push rod (50) passes on the upper side, and a locking groove (43) formed on the lower inner side, and a bottom plate (44) assembled to the lower side of the body (41) to close the open lower side of the body (41) and having a locking projection (48) formed on the outer circumference that engages with the locking projection (38) of the fixing groove (32).

[0037] An insertion part (45) may be further formed on the upper side of the base plate (44), in which the tip part (46) is caught and supported in the catch groove (43).

[0038] Referring to FIG. 8, when the corrugated cardboard (2) is cut, the push rod (50) is lowered from a raised state and then raised again, and the elastic member (70) is compressed when the push rod (50) is lowered from an extended state and then extended again.

[0039] The above push rod (50) may be provided with a connecting plate (52) on the lower side that is slidably coupled to the interior of the cylinder (40).

[0040] The above-mentioned connecting plate (52) is formed to have a shape corresponding to the cross-sectional shape of the cylinder (40). For example, the connecting plate (52) is formed in a circular shape.

[0041] The contact head (60) is screw-fastened to the upper side of the push rod (50).

[0042] The above-mentioned contact head (60) is fixed, for example, to the upper side of the push rod (50) via a fixing screw (66).

[0043] The above-mentioned contact head (60) may be provided with a cushion layer (62) made of rubber or sponge, etc., on its upper surface.

[0044] That is, the upper part (62) of the above-mentioned contact head (60) is made of a cushion layer (62) made of rubber or sponge, etc., and the rear body part (61) is made of metal, synthetic resin, etc. to have excellent rigidity.

[0045] The side perimeter shape of the above-mentioned contact head (60) can be formed to correspond to the inner side perimeter shape of the above-mentioned knife (24).

[0046] The above elastic member (70) can be made of a compression coil spring.

[0047] The above elastic member (70) is compressed when the corrugated cardboard (2) is cut and then returns to its original state. That is, it is compressed to a length corresponding to the thickness of the corrugated cardboard (2) and then stretched back to its original state by elasticity.

[0048] Although preferred embodiments of a cutting roller for a rotary die cutting device according to the present invention have been described above, the present invention is not limited thereto, and various modifications are possible within the scope of the claims, the description of the invention, and the attached drawings, and such modifications are also within the scope of the present invention. Explanation of the symbols

[0049] 2 : Corrugated cardboard 2A : The remaining part of the corrugated cardboard 2B: The part where the corrugated cardboard is cut 10: Cutting roller 11: Roller body 20: Cutting die 22 : Base 24 : Knife 25 : Blade 30 : Seat push part 32 : Fixing groove 35 : Locking tab 40 : Cylinder 41 : Body 42 : Upper movement hole 43 : Locking groove 44 : Base plate 45 : Locking projection 45 : Insertion part 50 : Push rod 52 : Connecting plate 60 : Close-fitting head 62 : Cushion layer 70 : Elastic member

Claims

Claim 1 A cutting roller (10) comprising a roller body (11) and a cutting die (20) coupled to the roller body (11), wherein the cutting die (20) comprises a base (22) coupled to the outer surface of the roller body (11), a knife (24) having a lower end fixed by being embedded in the base (22) and a blade (25) formed at the upper end, and having a shape corresponding to the shape of the corrugated cardboard (2) to be cut in order to cut the corrugated cardboard (2) into a predetermined shape, and a sheet pusher (30) that applies a pushing force to the cut portion (2B) of the corrugated cardboard (2) so that the cut portion (2B) of the corrugated cardboard (2) is separated from the remaining portion (2A) of the corrugated cardboard (2) when the corrugated cardboard (2) is cut, and wherein the sheet pusher (30) comprises a plurality of fixing grooves (32) formed at regular intervals in the inner portion of the base (22) where the knife (24) is supported, and each of the A cutting roller for a rotary die cutting device comprising a plurality of cylinders (40) assembled inside a fixed groove (32), a plurality of push rods (50) each having a lower end installed to be movable up and down inside the cylinder (40), a contact head (42) installed on the upper end of the plurality of push rods (50) and having an upper end surface in contact with the cut portion (2B) of the corrugated cardboard (2) (when cutting the corrugated cardboard (2)), and a plurality of elastic members (60) installed inside each cylinder (40) and applying force to ensure that each push rod (50) always moves upward. Claim 2 A cutting roller for a rotary die cutting device according to claim 1, wherein the fixing groove (32) has a catch projection (35) on the lower side, and the cylinder (40) has a catch projection (45) on the lower side that catches on the catch projection (35). Claim 3 A cutting roller for a rotary die cutting device according to claim 2, wherein the fixed groove (32) is formed to penetrate the base (22), and the cylinder (40) is moved from the lower side to the upper side of the fixed groove (32) and installed in the fixed groove (32). Claim 4 A cutting roller for a rotary die cutting device according to claim 2, wherein the cylinder (40) comprises a body (41) having a tubular shape with an open lower side and an upper and lower moving hole (52) formed on the upper side through which the push rod (50) passes, and a bottom plate (44) assembled on the lower side of the body (41) to close the open lower side of the body (41) and having the locking projection (45) on the outer circumference. Claim 5 A cutting roller for a rotary die cutting device according to claim 4, wherein the body (41) further has a catch groove (43) on the lower inner surface, and the bottom plate (44) further has an insertion part (46) on the upper side into which the tip is inserted into the catch groove (43). Claim 6 A cutting roller for a rotary die cutting device according to claim 1, wherein the cylinder (40) comprises a body (41) having a tubular shape with an open lower side and an upper and lower moving hole (42) formed on the upper side through which the push rod (50) passes, and a bottom plate (44) coupled to the lower side of the body (41) to close the open lower side of the body (41). Claim 7 A cutting roller for a rotary die cutting device according to claim 1, wherein the push rod (50) has a connecting plate (52) that is slidably coupled to the interior of the cylinder (40) on the lower side, and the connecting plate (52) is formed to have a shape corresponding to the cross-sectional shape of the cylinder (40). Claim 8 In claim 1, the contact head (60) is a cutting roller for a rotary die cutting device that is screw-fastened to the push rod (50). Claim 9 In claim 1, the contact head (60) is a cutting roller for a rotary die cutting device formed in a shape corresponding to the internal cross-sectional shape of the knife (24). Claim 10 A cutting roller for a rotary die cutting device according to claim 1, wherein the contact head (60) is characterized by having a cushion layer (62) made of rubber or sponge on its upper surface. Claim 11 A cutting roller for a rotary die cutting device according to claim 1, wherein the elastic member (70) is made of a compression coil spring.

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