Drying device for packaging printing machine

Abstract

The utility model discloses a drying device for a packaging printing machine, which comprises a base frame, the inside of the base frame is hollow to form a drying cavity, a first traction wheel and a second traction wheel are arranged in the drying cavity, and the first traction wheel is horizontally and symmetrically arranged relative to the second traction wheel. The first traction wheel and the second traction wheel are each provided with a first abutting column and a second abutting column which extend in the radial direction in a circumferential array mode. According to the drying device for the packaging printing machine, the first abutting columns and the second abutting columns sequentially rotate to abut against and support the material belt so that the contact area between the first traction wheel and the material belt and the contact area between the second traction wheel and the material belt can be reduced, and therefore the first traction wheel and the second traction wheel do not need to make contact with all positions of the material belt; therefore, the problem that printing patterns are damaged due to the fact that the first traction wheel and the second traction wheel rub ink on the material belt is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing machines, in particular to a drying device for a packaging printing machine. Background Art

[0002] A printing press is a machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate mounting, inking, embossing, and paper feeding (including folding). Its working principle is to first make the text and images to be printed into a printing plate, install it on the printing press, and then apply ink to the places with text and images on the printing plate manually or by the printing press, and then directly or indirectly transfer it to paper or other substrates (such as textiles, metal plates, plastics, leather, templates, glass and ceramics, etc.), thereby replicating printed products identical to the printing plate. The invention and development of the printing press has played an important role in the spread of human civilization and culture.

[0003] According to announcement number CN207931289U, published (announcement) date: 2018.10.02, the disclosed drying device for a packaging bag printing machine includes a combustion chamber, a drying chamber and a top cover. The combustion chamber and the drying chamber are both boxes with top openings. The top cover covers the top opening of the drying chamber. The drying chamber is arranged at the top opening of the combustion chamber. An open flame isolation layer is horizontally arranged at the bottom of the drying chamber. A number of traction rollers are arranged in the drying chamber. A combustion stove is arranged in the combustion chamber. A gas supply pipe is arranged on the combustion stove. A first through hole is arranged on the combustion chamber. The gas supply pipe can pass through the first through hole to extend to the outside of the combustion chamber. An air supply pump is arranged on the combustion stove. An air supply pipe is arranged on the air supply pump. A second through hole is arranged on the combustion chamber. The air supply pipe can pass through the second through hole to communicate with the external atmosphere.

[0004] In the prior art including the above-mentioned patent, a traction roller is used to roll the material into a drying chamber for drying. However, since the traction roller rolls to transport the material, the traction roller will continue to roll and contact all surfaces of the material, which may easily cause the traction roller to scratch the ink on the material and damage the printed pattern. Utility Model Content

[0005] The purpose of the utility model is to provide a drying device for a packaging printing machine, which is used to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drying device for a packaging printing machine, comprising a material belt and a base frame, wherein the base frame is hollow inside to form a drying chamber, wherein the drying chamber is provided with:

[0007] A first traction wheel and a second traction wheel, wherein the first traction wheel is horizontally symmetrically arranged with respect to the second traction wheel, and the first traction wheel and the second traction wheel are respectively provided with radially extending first and second resistance columns in a circumferential array, and the first traction wheel and the second traction wheel are driven to rotate so that the first and second resistance columns rotate circumferentially to convey the material belt forward, and the material belt is pushed by the first and second resistance columns to be located in a V shape in the drying chamber, and the first traction wheel is located at the lower side of the material belt.

[0008] Preferably, the first traction wheel and the second traction wheel are both provided with a charging chamber for charging hot air, the first resistance column and the second resistance column are both provided with a pre-blowing groove connected with the charging chamber, and the first traction wheel and the second traction wheel are driven to rotate so that the pre-blowing groove rotates toward the material belt before the first resistance column and the second resistance column.

[0009] Preferably, a drying groove opening along the circumference of the first traction wheel is provided on the side surface of the first friction column of the first traction wheel, and the drying groove is communicated with the charging chamber. The first traction wheel is driven to rotate so that the two first friction columns contact the conveying material belt, and the drying groove and the pre-blowing groove form a hot air vortex in the two first friction columns and the material belt.

[0010] Preferably, the pre-blowing slot can be divided into a connecting chamber, an expansion chamber and a blowing outlet which are connected in sequence, the connecting chamber is connected to the charging chamber, and the cross-sectional flow areas of the connecting chamber, the expansion chamber and the blowing outlet are first expanded and then reduced in sequence.

[0011] Preferably, a blocking block is slidably disposed in the first abutting column, and the blocking block is driven to slide by gravity to block the drying slot and the pre-blowing slot facing away from the first side of the material belt.

[0012] Preferably, a flexible contact piece is provided in the first abutting column, and the blocking block is driven to abut against the flexible contact piece to block the drying slot and the pre-blowing slot.

[0013] Preferably, a heat-insulating layer is provided in the drying chamber of the base frame.

[0014] In the above technical scheme, the utility model provides a drying device for a packaging printing machine, which has the following beneficial effects: a plurality of first resistance columns and a second resistance column are used to rotate and resist the supporting material belt in sequence to reduce the contact area between the first traction wheel, the second traction wheel and the material belt, so that the first traction wheel and the second traction wheel do not need to contact all positions of the material belt, thereby avoiding the problem of the first traction wheel and the second traction wheel scratching the ink on the material belt and causing damage to the printed pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of a partial structure of the overall embodiment of the utility model;

[0017] Figure 2 A schematic cross-sectional view of the overall structure provided for an embodiment of the utility model;

[0018] Figure 3 A partial enlarged schematic diagram of point A provided in an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the blowing direction of the air to the material belt by the first traction wheel provided in an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Base frame; 2. Material belt; 3. First traction wheel; 31. First resistance column; 32. Filling chamber; 33. Pre-blowing slot; 331. Connecting chamber; 332. Expansion chamber; 333. Blowing outlet; 34. Drying slot; 35. Sliding slot; 4. Second traction wheel; 41. Second resistance column; 5. Sealing block; 6. Flexible contact piece; 8. Conveying roller group; 9. Insulation layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0023] like Figure 1-4 As shown, a drying device for a packaging printing machine includes a material belt 2 and a base frame 1. The base frame 1 is hollow inside to form a drying chamber. The drying chamber is provided with:

[0024] A first traction wheel 3 and a second traction wheel 4 are provided, the first traction wheel 3 is horizontally symmetrically arranged with respect to the second traction wheel 4, and radially extending first and second resistance columns 31 and 41 are respectively arranged in a circumferential array on the first traction wheel 3 and the second traction wheel 4, the first traction wheel 3 and the second traction wheel 4 are driven to rotate so that the first and second resistance columns 31 and 41 rotate circumferentially to convey the material belt 2 forward, the material belt 2 is pushed by the first and second resistance columns 31 and 41 to be located in a V shape in the drying chamber, and the first traction wheel 3 is located at the lower side of the material belt 2.

[0025] Specifically, the base frame 1 is symmetrically provided with a conveying roller group 8 for assisting in conveying the material belt 2. The base frame 1 is hollow inside to form a drying chamber. A heating component is provided in the drying chamber. The heating component is a technical common sense known to those skilled in the art and will not be described in detail here. The first traction wheel 3 and the second traction wheel 4 are both rotatably provided in the drying chamber, and the second traction wheel 4 is located between the two first traction wheels 3. Figure 2 As shown, the material belt 2 can be made to pass through the first traction wheel 3, the second traction wheel 4 and the first traction wheel 3 in sequence in a V shape, thereby realizing the support of the material belt 2 in the drying chamber, and then the first traction wheel 3 and the second traction wheel 4 are driven to rotate to make the first resistance column 31 and the second resistance column 41 rotate circumferentially to convey the material belt 2 forward, and a plurality of first resistance columns 31 and the second resistance columns 41 are used to rotate and resist the support material belt 2 in sequence to reduce the contact area between the first traction wheel 3, the second traction wheel 4 and the material belt 2, thereby making it unnecessary for the first traction wheel 3 and the second traction wheel 4 to contact various positions of the material belt 2, thereby reducing the problem of the first traction wheel 3 and the second traction wheel 4 scratching the ink on the material belt 2 and causing damage to the printed pattern.

[0026] Furthermore, since the material belt 2 is composed of a plurality of packaging bags connected end to end in sequence, the distance between the two first friction columns 31 can be made substantially equal to the distance between the ends of the packaging bags of the material belt 2, and the first friction column 31 is aligned with the end of the packaging bags of the material belt 2. Subsequently, if the first traction wheel 3 and the second traction wheel 4 rotate to convey the material belt 2, the first friction column 31 and the second friction column 41 both rotate axially to contact the end-to-end connection of the packaging of the material belt 2 in sequence for conveying, thereby further avoiding the problem of the first friction column 31 and the second friction column 41 contacting the pattern position in the middle of the packaging bags of the material belt 2 and causing scratches and damage.

[0027] Furthermore, a heat-insulating layer 9 is provided in the drying chamber of the base frame 1, and the heat-insulating layer 9 is utilized to improve the heat-insulating effect in the drying chamber and improve the drying efficiency.

[0028] In the above technical solution, a plurality of first resistance posts 31 and second resistance posts 41 are used to rotate and resist the supporting material belt 2 in sequence to reduce the contact area between the first traction wheel 3, the second traction wheel 4 and the material belt 2, so that the first traction wheel 3 and the second traction wheel 4 do not need to contact all positions of the material belt 2, thereby avoiding the problem that the first traction wheel 3 and the second traction wheel 4 scratch the ink on the material belt 2 and cause damage to the printed pattern.

[0029] As an embodiment further provided by the present invention, a charging chamber 32 for charging hot air is provided on the first traction wheel 3 and the second traction wheel 4, a pre-blowing slot 33 connected to the charging chamber 32 is provided on the first resistance column 31 and the second resistance column 41, and the first traction wheel 3 and the second traction wheel 4 are driven to rotate so that the pre-blowing slot 33 rotates toward the material belt 2 before the first resistance column 31 and the second resistance column 41.

[0030] Specifically, Figure 2 and Figure 3 As shown, the first traction wheel 3 and the second traction wheel 4 are both provided with a charging chamber 32, and the charging chamber 32 is connected to the external hot air pipe, and the pre-blowing slots 33 on the first abutting column 31 and the second abutting column 41 are respectively connected to the charging chambers 32 on the first traction wheel 3 and the second traction wheel 4. When the first traction wheel 3 and the second traction wheel 4 rotate to convey the material belt 2, as shown in FIG. Figure 3 As shown, the first traction wheel 3 rotates clockwise to make the first friction column 31 rotate close to the material belt 2 for conveying, and because the pre-blowing groove 33 is located on the side of the first friction column 31, before the first friction column 31 rotates close to the material belt 2, the pre-blowing groove 33 has been facing the surface of the material belt 2. At this time, the hot air filled in the cavity 32 is first dried along the pre-blowing groove 33 toward the surface of the material belt 2, and then the first friction column 31 is in contact with the position where the material belt 2 has been pre-dried by hot air, thereby further avoiding the problem of the first friction column 31 and the second friction column 41 scratching the ink on the material belt 2 and causing damage to the printed pattern.

[0031] As an embodiment further provided by the present invention, a drying groove 34 is provided on the side of the first conflicting column 31 of the first traction wheel 3 and is open along the circumference of the first traction wheel 3. The drying groove 34 is communicated with the charging chamber 32. The first traction wheel 3 is driven to rotate so that the two first conflicting columns 31 conflict with the conveying material belt 2, and the drying groove 34 and the pre-blowing groove 33 form a hot air vortex in the two first conflicting columns 31 and the material belt 2.

[0032] Specifically, Figure 3As shown, a drying groove 34 is provided on the side of the first abutting column 31 and is opened along the circumference of the first traction wheel 3. The drying groove 34 is connected to the charging chamber 32. When the ends of the two first abutting columns 31 abut against the surface of the material belt 2 for conveying, the two first abutting columns 31 and the material belt 2 enclose a space, and the drying groove 34 faces the enclosed space. Figure 4 As shown, the pre-blowing slot 33 blows hot air along the surface of the material belt 2, and the drying slot 34 blows hot air at an angle toward the surface of the material belt 2, thereby forming a hot air vortex in the space surrounded by the two first conflicting columns 31 and the material belt 2, so as to quickly heat and dry the material belt 2, thereby improving the efficiency and effect of drying.

[0033] As an embodiment further provided by the present invention, the pre-blowing slot 33 can be divided into a connecting chamber 331, an expansion chamber 332 and a blowing outlet 333 which are connected in sequence. The connecting chamber 331 is connected to the charging chamber 32, and the cross-sectional flow areas of the connecting chamber 331, the expansion chamber 332 and the blowing outlet 333 are first expanded and then reduced in sequence.

[0034] Specifically, Figure 3 As shown, the pre-blowing slot 33 can be divided into a connecting chamber 331, an expansion chamber 332 and a blowing outlet 333 which are connected in sequence. The connecting chamber 331 is connected to the charging chamber 32, and the cross-sectional flow areas of the connecting chamber 331, the expansion chamber 332 and the blowing outlet 333 are first expanded and then reduced in sequence. When the hot air in the charging chamber 32 is blown out along the connecting chamber 331, the expansion chamber 332 and the blowing outlet 333 in sequence, the hot air first increases its flow rate due to entering the expansion chamber 332, and then the cross-sectional flow area of ​​the blowing outlet 333 is reduced, resulting in the mutual squeezing of the air flows and further increasing the wind speed, thereby improving the pre-drying efficiency at the pre-blowing slot 33.

[0035] As a further embodiment of the present invention, a blocking block 5 is slidably disposed in the first abutting column 31 , and the blocking block 5 is driven to slide by gravity to block the drying slot 34 and the pre-blowing slot 33 facing away from the first side of the material belt 2 .

[0036] Specifically, Figure 3 As shown, a sliding groove 35 is provided in the first abutting column 31, and the blocking block 5 is slidably disposed in the sliding groove 35. Figure 3The blocking block 5 is always sliding due to gravity. When the first traction wheel 3 is driven to rotate so that the position of the first abutting column 31 is higher than the axial position of the first traction wheel 3, the blocking block 5 slides away from the connecting chamber 331, thereby making the connecting chamber 331 communicate with the charging chamber 32, so that when the first abutting column 31 is close to the material belt 2, the pre-blowing slot 33 and the drying slot 34 are opened for hot air drying; and when the first traction wheel 3 is driven to rotate so that the position of the first abutting column 31 abuts against the axial position of the first traction wheel 3, the blocking block The blocking block 5 slides under the force of gravity close to the connecting cavity 331 to block the connecting cavity 331, thereby separating the pre-blowing groove 33 and the drying groove 34 from the charging cavity 32, so that the drying groove 34 and the pre-blowing groove 33 facing away from the first side of the material belt 2 do not blow out hot air, and the existence of the blocking block 5 is used to reduce the waste of hot air resources. Secondly, blocking the drying groove 34 and the pre-blowing groove 33 facing away from the first side of the material belt 2 can also increase the air flow pressure of the drying groove 34 and the pre-blowing groove 33 facing the first side of the material belt 2, thereby improving the drying efficiency.

[0037] As an embodiment further provided by the present invention, a flexible contact member 6 is provided in the first abutting column 31 , and the blocking block 5 is driven to abut against the flexible contact member 6 to block the drying slot 34 and the pre-blowing slot 33 .

[0038] Specifically, a flexible contact piece 6 is provided in the first abutting column 31 , and the blocking block 5 is driven to abut against the flexible contact piece 6 to block the drying slot 34 and the pre-blowing slot 33 . The flexible contact piece 6 is not utilized to further improve the blocking stability of the blocking block 5 .

[0039] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A drying device for a packaging printing machine, comprising a material belt (2), characterized in that: It also comprises a base frame (1), the interior of the base frame (1) is hollow to form a drying chamber, and the drying chamber is provided with: A first traction wheel (3) and a second traction wheel (4), wherein the first traction wheel (3) is horizontally symmetrically arranged with respect to the second traction wheel (4), and radially extending first abutment columns (31) and second abutment columns (41) are respectively arranged in a circumferential array on the first traction wheel (3) and the second traction wheel (4), and the first traction wheel (3) and the second traction wheel (4) are driven to rotate so that the first abutment columns (31) and the second abutment columns (41) rotate circumferentially to convey the material belt (2) forward, and the material belt (2) is pushed by the first abutment columns (31) and the second abutment columns (41) to be located in a V-shape in the drying chamber, and the first traction wheel (3) is located below the material belt (2).

2. The drying device for a packaging printing machine according to claim 1, characterized in that: The first traction wheel (3) and the second traction wheel (4) are both provided with a charging chamber (32) for charging hot air, and the first abutment column (31) and the second abutment column (41) are both provided with a pre-blowing slot (33) connected to the charging chamber (32), and the first traction wheel (3) and the second traction wheel (4) are driven to rotate so that the pre-blowing slot (33) rotates toward the material belt (2) before the first abutment column (31) and the second abutment column (41).

3. The drying device for a packaging printing machine according to claim 2, characterized in that: A drying groove (34) opening along the circumference of the first traction wheel (3) is provided on the side surface of the first abutment column (31) of the first traction wheel (3); the drying groove (34) is communicated with the charging chamber (32); the first traction wheel (3) is driven to rotate so that the two first abutment columns (31) abut against the conveying material belt (2); and the drying groove (34) and the pre-blowing groove (33) form a hot air vortex in the two first abutment columns (31) and the material belt (2).

4. The drying device for a packaging printing machine according to claim 2, characterized in that: The pre-blowing slot (33) can be divided into a connecting chamber (331), an expansion chamber (332) and a blowing outlet (333) which are connected in sequence. The connecting chamber (331) is connected to the charging chamber (32), and the cross-sectional flow areas of the connecting chamber (331), the expansion chamber (332) and the blowing outlet (333) are first expanded and then reduced in sequence.

5. The drying device for a packaging printing machine according to claim 3, characterized in that: A blocking block (5) is slidably disposed inside the first abutting column (31), and the blocking block (5) is driven to slide by gravity to block the drying slot (34) and the pre-blowing slot (33) on the first side facing away from the material belt (2).

6. The drying device for a packaging printing machine according to claim 5, characterized in that: A flexible contact piece (6) is provided in the first abutting column (31), and the blocking block (5) is driven to abut against the flexible contact piece (6) to block the drying slot (34) and the pre-blowing slot (33).

7. The drying device for a packaging printing machine according to claim 1, characterized in that: A heat-insulating layer (9) is provided in the drying chamber of the base frame (1).

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