A pulp molding drum forming machine

Abstract

The invention discloses a pulp molding drum forming machine, comprising: a drum, a mold frame, a forming mold, a power mechanism, an air chamber and a vacuum air distribution chamber; the drum is a polyhedron, comprising a plurality of drum surfaces, a mold frame is fixedly arranged on each drum surface, and a mold frame vent hole connected to the drum is opened; the forming mold is fixedly arranged on the mold frame; the power mechanism is used to drive the drum to rotate; the air chamber is arranged in the drum and is connected to the forming mold; the vacuum air distribution chamber is arranged on the side of the drum and is connected to the air chamber; the air chamber is made of a bent sheet metal part and is integrally welded with the drum, the air chamber comprises a side sealing plate, a bottom sealing plate and a drain pipe, the bottom sealing plate has a certain slope, and the drain pipe is located at the end of the bottom sealing plate with a lower height. The invention reduces the required vacuum consumption, improves the efficiency of vacuum dehydration, and impurities in the water are not easy to accumulate on the bottom sealing plate, reduces the accumulated dirt, and shortens the cleaning cycle.

Description

Technical Field

[0001] The invention relates to the field of pulp molding, and in particular to a pulp molding rotary drum forming machine. Background Art

[0002] Pulp molding is a three-dimensional papermaking technology that uses waste paper pulp as raw material to shape paper products into certain three-dimensional shapes using special molds on a molding machine. It is often used to make egg trays, egg boxes, fruit trays, flower pots, lunch boxes, disposable medical bedpans, and industrial cushioning packaging. The finished product can be recycled and reused, and its volume is smaller than that of foamed plastics, so it can be stacked and convenient for transportation.

[0003] Pulp molding mainly includes pulp suction, dehydration, product transfer, drying and shaping processes. The usual practice is to use a pulp suction molding machine to carry out pulp suction and dehydration treatment, and then transfer the semi-finished product from the pulp suction molding machine to the transfer mold, and then carry out the drying and shaping process to obtain the final finished paper box.

[0004] The slurry suction forming machine generally includes a reciprocating drum forming machine, a swing drum forming machine, and a drum suction forming machine. The drum forming machine has a drum that performs intermittent rotation. The drum has a tetrahedron, a hexahedron, an octahedron, a dodecahedron, etc. Each surface will intermittently rotate to a different station to perform each process. Figure 1 As shown in the figure, after the molding mold completes the slurry absorption, the vacuum air distribution chamber will perform vacuum dehydration treatment on the mold cavity through the suction pipe to extract the moisture in the slurry.

[0005] However, there are certain defects in setting up the suction pipe for water intake and pumping: (1) The suction pipe cannot be pre-processed and formed as a whole with the drum. It is often necessary to weld the pipe after the drum is completed. The assemblers need to drill into the inside of the drum to weld the suction pipe, which is difficult to construct and the welding quality is difficult to guarantee. (2) The suction pipe has many bends and merges. The main pipeline is arranged horizontally without a slope. Water cannot be naturally drained by its own weight. A large amount of vacuum is required, which consumes a lot of energy and causes a decrease in vacuum suction efficiency. In addition, due to the presence of certain impurities in the slurry, dirt will accumulate in the suction pipe, affecting the efficiency of the dehydration process. After long-term use, it is very difficult to clean the pipe. (3) The suction pipe and the drum are assembly structures with poor air tightness and are prone to water leakage. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the object of the present invention is to provide a pulp molding drum forming machine, which can dewater the pulp through an air chamber welded integrally with the drum.

[0007] The present invention is achieved through the following technical solutions:

[0008] A pulp molding drum forming machine comprises: a drum, a mold frame, a forming mold, a power mechanism, an air chamber and a vacuum air distribution chamber; the drum is a polyhedron, comprising a plurality of drum surfaces, the mold frame is fixedly arranged on each of the drum surfaces, and is provided with a mold frame air vent connected to the drum; the forming mold is fixedly arranged on the mold frame; the power mechanism is used to drive the drum to rotate; the air chamber is arranged in the drum and is connected to the forming mold; the vacuum air distribution chamber is arranged on the side of the drum and is connected to the air chamber; the air chamber is made of bent sheet metal and is welded integrally with the drum, the air chamber is a hollow structure, comprising a side sealing plate, a bottom sealing plate and a drain pipe, the bottom sealing plate has a certain slope, and the drain pipe is located at the end of the bottom sealing plate with a lower height.

[0009] Furthermore, the air chamber includes a plurality of air chamber reinforcing ribs, and the air chamber reinforcing ribs are evenly arranged on the side sealing plates.

[0010] Furthermore, the rotary drum is formed by integral welding.

[0011] Furthermore, the rotary drum is also provided with a plurality of rotary drum reinforcing ribs.

[0012] Furthermore, the vacuum gas distribution chamber is provided with a plurality of gas distribution holes for introducing vacuum, the number of the gas distribution holes corresponds to the number of the gas chambers, and the gas distribution holes are communicated with the gas chambers.

[0013] Furthermore, the power mechanism comprises a motor and a rotating main shaft, the rotating main shaft is transmission-connected to the motor, and the rotating main shaft is fixedly connected to the rotating drum and rotates in conjunction therewith.

[0014] Furthermore, a main shaft mounting hole is also provided at the end of the rotating drum, and the main shaft mounting hole is suitable for matching with the rotating main shaft, and the rotating main shaft is rotatably arranged in the main shaft mounting hole.

[0015] Furthermore, the pulp molding drum forming machine also includes a frame, and the motor is fixedly mounted on the frame.

[0016] Furthermore, a mold frame mounting hole is provided on the rotating drum, and the mold frame is fixedly connected to the rotating drum by bolts.

[0017] Furthermore, the rotating drum is an octahedron, including eight rotating drum surfaces.

[0018] Compared with the prior art, the present invention can achieve the following beneficial effects: by providing an air chamber integrally formed with the drum, the conventional air suction pipe is replaced to realize the dewatering process of the pulp, which at least includes the following technical effects: (1) the air chamber is formed by welding the drum integrally with the bent sheet metal parts, and no subsequent welding is required after the drum is manufactured, which reduces the difficulty and workload of the assembly workers and improves the welding quality; (2) the air chamber is an overall hollow structure, the area of ​​the side wall is smaller than that of the pipe, the water capacity is large, and the bottom sealing plate has a certain slope, the water flow can be discharged naturally by its own weight, reducing the required vacuum consumption and improving the efficiency of vacuum dehydration, and impurities in the water are not easy to accumulate on the bottom sealing plate, reducing the accumulated dirt and shortening the cleaning cycle; (3) the air chamber is welded integrally with the drum through the side sealing plate, the air tightness is better than the pipe, it is not easy to leak, and the efficiency of vacuum dehydration can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of dehydration of a rotary drum forming machine in the prior art;

[0020] Figure 2 It is an overall schematic diagram of the present invention;

[0021] Figure 3 It is a front cross-sectional view of the present invention;

[0022] Figure 4 is a three-dimensional schematic diagram of a rotating drum;

[0023] Figure 5 It is the left side view of the drum (only one mold frame is shown);

[0024] Figure 6 It is a schematic diagram of dehydration of the pulp molding machine of the present invention;

[0025] Figure 7 The figure is a schematic diagram of the operation of an embodiment of the present invention.

[0026] In the figure: 10, drum; 11, drum reinforcement rib; 12, spindle mounting hole; 20, mold frame; 21, mold frame mounting hole; 30, forming mold; 40, air chamber; 41, side sealing plate; 42, bottom sealing plate; 43, drain pipe; 44, air chamber reinforcement rib; 50, motor; 60, rotating spindle; 70, vacuum air distribution chamber; 71, air distribution hole; 80, frame; 90, suction pipe; 100, slurry pool; 110, slurry suction station; 120, dehydration station; 130, transfer station; 140, mold washing station. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] The invention discloses a pulp molding rotary drum forming machine, which is used for pulp absorption and dehydration treatment of pulp molding. Figure 2-Figure 4 This pulp molding drum forming machine includes: a drum 10, a mold frame 20, a forming mold 30, a power mechanism, an air chamber 40 and a vacuum air distribution chamber 70. The drum 10 is a polyhedron, including a plurality of drum surfaces. The mold frame 20 for mounting the forming mold 30 is fixedly arranged on each drum surface. The bottom of the mold frame 20 is provided with a mold frame vent hole connected to the drum 10, so that the vacuum can adsorb the forming mold 30; the forming mold 30 is used to accommodate pulp and form the pulp, and is fixedly arranged on the mold frame 20; the power mechanism is used to drive the drum 10 to perform intermittent rotational motion; the air chamber 40 is arranged in the drum 10 and is connected to the forming mold 30 for introducing vacuum and draining water; the vacuum air distribution chamber 70 is fixedly arranged on the side of the drum 10 and is connected to the air chamber 40. The vacuum air distribution chamber 70 rotates synchronously with the drum 10, and a vacuum pump is arranged outside the vacuum air distribution chamber 70 (not shown), the air chamber 40 is vacuum-adsorbed to dehydrate the pulp in the forming mold 30; specifically, the air chamber 40 is made of bent sheet metal and welded integrally with the drum 10, that is, it is welded together with the main body of the drum 10 during the manufacturing process of the drum 10, and there is no need for subsequent welding after the drum 10 is completed; the air chamber 40 is a hollow structure, including a side sealing plate 41, a bottom sealing plate 42 and a drain pipe 43, the side sealing plate 41 is welded in the drum 10, the bottom sealing plate 42 has a certain slope, and the drain pipe 43 is located at the end of the bottom sealing plate 42 with a lower height, so the length of the drain pipe 43 is very short, and it only serves as a transfer, and the other end of the drain pipe 43 is connected to the vacuum air distribution chamber 70.

[0029] As a preferred embodiment, see Figure 3 The air chamber 40 includes a plurality of air chamber reinforcing ribs 44, which are evenly arranged on the side sealing plate 41. Since the side sealing plate 41 is a flat plate structure made of sheet metal and is subject to a certain vacuum adsorption force, the air chamber reinforcing ribs 44 are provided to enhance its strength and stability. In this embodiment, the air chamber reinforcing ribs 44 are strip-shaped structures.

[0030] As a preferred embodiment, the drum 10 is integrally welded. In the past, the drum usually adopts an assembled drum, and each component is separately processed and then assembled, and the method adopted is mostly bolt connection. There are cumulative errors in the process from processing to assembly, which makes it impossible to guarantee the accuracy of the polyhedron, which will cause inaccurate mold closing when the product is transferred, resulting in a low product qualification rate; in addition, the overall rigidity of the drum is relatively low. When the drum forming machine is running, the drum stops intermittently. Due to its own inertia, it is easy to cause overall deformation. Therefore, in actual production, the rotation speed of the drum cannot be too fast, which restricts the improvement of production capacity. The present invention adopts an integrally formed drum 10, which ensures the accuracy of mold closing and improves the product yield. In addition, the overall rigidity of the drum 10 is high, which can increase the rotation speed and improve the production capacity.

[0031] As a preferred embodiment, see Figure 3 , a plurality of drum reinforcing ribs 11 are also provided on the drum 10. As described above, the overall structure of the drum 10 is integrated, so its strength and stability need to be ensured, so the drum reinforcing ribs 11 are arranged on the drum 10. In this embodiment, the drum reinforcing ribs 11 are long strip structures.

[0032] As a preferred embodiment, see Figure 5 The vacuum gas distribution chamber 70 is provided with a plurality of gas distribution holes 71 for introducing vacuum, the number of the gas distribution holes 71 corresponds to the number of the gas chambers 40, and the gas distribution holes 71 are connected to the vacuum pump and the gas chambers 40 respectively.

[0033] As a preferred embodiment, see Figure 3 The power mechanism includes a motor 50 and a rotating spindle 60, the rotating spindle 60 is connected to the motor 50, and the rotating spindle 60 is fixedly connected to the drum 10 and rotates in conjunction. The power mechanism includes but is not limited to the motor 50, and can also use a rotating cylinder and other driving mechanisms that can achieve rotational motion.

[0034] Further preferably, a spindle mounting hole 12 is also provided at the end of the drum 10, and the spindle mounting hole 12 is suitable for cooperating with a rotating spindle 60, and the rotating spindle 60 is rotatably disposed in the spindle mounting hole 12; the motor 50 drives the rotating spindle 60, thereby driving the drum 10 to perform intermittent rotational motion.

[0035] As a preferred embodiment, see Figure 2 The pulp molding drum forming machine also includes a frame 80 for supporting the motor 50 , and the motor 50 is fixedly mounted on the frame 80 .

[0036] As a preferred embodiment, see Figure 4 The drum 10 is also provided with a mold frame mounting hole 21, and the mold frame 20 and the drum 10 are fixedly connected by bolts.

[0037] As a preferred embodiment, the drum 10 is an octahedron, including eight drum surfaces.

[0038] See also Figure 7 In this embodiment, the drum 10 is an octahedron. A pulp pool 100 for accommodating pulp is provided at the bottom of the drum forming machine. The drum 10 rotates intermittently. Each time it rotates, the drum surface reaches the position of the adjacent drum surface. The drum surface at the bottom is immersed in the pulp pool 100, which is a pulp suction station 110. The five adjacent drum surfaces along the rotation direction are dewatering stations 120. One drum surface adjacent to the dewatering station 120 along the rotation direction is a transfer station 130. One drum surface adjacent to the transfer station 130 along the rotation direction is a mold washing station 140.

[0039] The specific working process is as follows: Figure 6-Figure 7 , the motor 50 drives the rotating main shaft 60 to drive the drum 10 to rotate, the drum surface located at the slurry suction station 110 is immersed in the pulp pool 100, the vacuum pump is started and suction is performed through the vacuum gas distribution chamber 70, and the pulp is sucked into the forming mold 30; the drum 10 continues to rotate, and the drum surface located at the slurry suction station 110 reaches the dewatering station 120, and the vacuum pump continues to draw in vacuum, so that the moisture in the pulp liquid is sucked into the air chamber 40, passes through the inclined diversion of the bottom sealing plate 42, and is finally discharged through the drain pipe 43, and at the same time, the other drum surface reaches the slurry suction station 110 and sucks slurry; the forming mold 30 after dehydration treatment reaches the transfer station 130, cooperates with the product transfer mold to complete the transfer of the semi-finished product, and performs the subsequent drying and shaping process; the forming mold 30 after completing the product transfer reaches the mold washing station 140 for the cleaning process; the cleaned forming mold 30 will reach the slurry suction station 110 again to realize the working cycle.

[0040] Through the detailed description of the above embodiments, it can be understood that the present invention replaces the conventional suction pipe 90 by providing an air chamber 40 integrally formed with the drum 10 to achieve the dewatering process of the pulp, which at least includes the following technical effects: (1) The air chamber 40 is formed by welding the drum 10 integrally with the bent sheet metal parts, and does not need to be subsequently welded after the drum 10 is manufactured, which reduces the difficulty and workload of the assembly workers and improves the welding quality; (2) The air chamber 40 is an overall hollow structure, the area of ​​the side wall is smaller than that of the pipe, the water capacity is large, and the bottom sealing plate 42 has a certain slope, the water flow can be discharged naturally by its own weight, reducing the required vacuum consumption, improving the efficiency of vacuum dehydration, and impurities in the water are not easy to accumulate on the bottom sealing plate 42, reducing the accumulated dirt and shortening the cleaning cycle; (3) The air chamber 40 is welded integrally with the drum 10 through the side sealing plate 41, and the air tightness is better than that of the pipe, and it is not easy to leak, which can also improve the efficiency of vacuum dehydration.

[0041] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pulp molding drum forming machine, characterized in that: include: A rotating drum, a mold frame, a forming mold, a power mechanism, an air chamber and a vacuum air distribution chamber; the rotating drum is a polyhedron, including a plurality of rotating drum surfaces, the mold frame is fixedly arranged on each of the rotating drum surfaces, and is provided with a mold frame air vent connected to the rotating drum; the forming mold is fixedly arranged on the mold frame; the power mechanism is used to drive the rotating drum to rotate; the air chamber is arranged in the rotating drum and is connected to the forming mold; the vacuum air distribution chamber is arranged on the side of the rotating drum and is connected to the air chamber; the air chamber is made of bent sheet metal parts and is welded integrally with the rotating drum, the air chamber is a hollow structure, including a side sealing plate, a bottom sealing plate and a drain pipe, the bottom sealing plate has a certain slope, the drain pipe is located at the end of the bottom sealing plate with a lower height, and the other end of the drain pipe is connected to the vacuum air distribution chamber; The air chamber further comprises a plurality of air chamber reinforcing ribs, and the air chamber reinforcing ribs are evenly arranged on the side sealing plate; The rotary drum is integrally welded and formed; The rotary drum is also provided with a plurality of rotary drum reinforcing ribs.

2. The pulp molding drum forming machine according to claim 1, characterized in that: The vacuum gas distribution chamber is provided with a plurality of gas distribution holes for introducing vacuum, the number of the gas distribution holes corresponds to the number of the gas chambers, and the gas distribution holes are communicated with the gas chambers.

3. The pulp molding drum forming machine according to claim 1, characterized in that: The power mechanism comprises a motor and a rotating main shaft, the rotating main shaft is in transmission connection with the motor, and the rotating main shaft is fixedly connected with the rotating drum and rotates in conjunction with it.

4. The pulp molding drum forming machine according to claim 3, characterized in that: The end of the rotating drum is also provided with a main shaft mounting hole, the main shaft mounting hole is suitable for the rotating main shaft to cooperate with, and the rotating main shaft is rotatably arranged in the main shaft mounting hole.

5. The pulp molding drum forming machine according to claim 3, characterized in that: The pulp molding drum forming machine also includes a frame, and the motor is fixedly mounted on the frame.

6. The pulp molding drum forming machine according to claim 1, characterized in that: The rotating drum is also provided with a mold frame mounting hole, and the mold frame is fixedly connected to the rotating drum by bolts.

7. The pulp molding drum forming machine according to claim 1, characterized in that: The rotating drum is an octahedron, including eight rotating drum surfaces.

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