Dry-pressing paper pulp molding machine

Abstract

The invention discloses a dry pressing paper pulp molding machine which comprises a rack, the rack comprises an upper rack and a lower rack, an upper mold assembly is arranged on the upper rack, the upper mold assembly comprises a shaping mechanism and a shaping mechanism, the upper mold assembly further comprises a pre-pressing mechanism, the pre-pressing mechanism is located between the shaping mechanism and the shaping mechanism, and the shaping mechanism is located between the shaping mechanism and the shaping mechanism. A pre-pressing upper die and a pre-pressing lifting mechanism are arranged at the pre-pressing mechanism; the upper rack is provided with an upper die assembly, the lower rack is provided with a lower die assembly, the lower die assembly comprises a pre-pressing lower die and a shaping lower die, the pre-pressing lower die is internally provided with a steam heating pipeline, and the upper die assembly and / or the lower die assembly are / is connected with a horizontal moving mechanism. Recycled waste heat is fully utilized for prepressing heating, the water content of paper pulp molding can be rapidly reduced, meanwhile, it can be avoided that drying is conducted outside the mold for a long time, and the drying efficiency is improved in a low-energy-consumption mode.

Description

Technical Field

[0001] The invention belongs to the technical field of pulp molding equipment, and more specifically designs a dry-pressing pulp molding machine. Background Art

[0002] Pulp molding is a three-dimensional papermaking technology. It uses waste paper as raw material and uses special molds on a molding machine to shape paper products of a certain shape. The production process is completed by pulping, adsorption molding, drying and shaping, etc. It is harmless to the environment and can be recycled.

[0003] The pulp molding dry pressing production process is a traditional production process, which separates pulp molding from drying, shaping and trimming processes, that is, the pulp is first made into a wet paper mold on the molding machine, and then transferred to the dryer outside the molding machine for drying (out-of-mold drying), and finally shaping and trimming are performed to complete the entire production process. Its production process is simple and the energy consumption is relatively low. It is mainly used for the production of egg trays, fruit trays and general industrial packaging products.

[0004] The dry pressing process takes 3-5 seconds to form, and then it is manually placed on the drying rack, and then the drying rack is pulled outdoors or to the drying room. Depending on the weather and the temperature of the drying room, it takes 6-10 hours outdoors in summer and 15-24 hours in winter; it takes 6-10 hours in the drying room; then the rough blank with only about 10% moisture is passed through a 40-ton press with a temperature of 160 degrees and hot-pressed for 3-5 seconds to shape.

[0005] The wet pressing process uses in-mold drying, but the energy consumption in the production process is relatively high. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides an additional pre-pressing component, which utilizes the steam generated by the heating of the shaping lower mold for heating, and fully utilizes the recovered waste heat for pre-pressing heating, so that the moisture content of pulp molding can be quickly reduced, while at the same time it can avoid long-term out-of-mold drying, thereby improving the drying efficiency in a low-energy consumption manner.

[0007] To achieve the above object, the present invention provides the following technical solution: a dry-pressed pulp molding machine, comprising a frame, the frame comprising an upper frame and a lower frame, an upper mold assembly is arranged on the upper frame, the upper mold assembly has a shaping mechanism and a shaping mechanism, The shaping mechanism is provided with a shaping upper mold and a shaping lifting mechanism, the shaping upper mold is located below the shaping lifting mechanism, and the shaping upper mold is located above the pulp tank, and the shaping upper mold is connected with a first suction pipe and a blowing pipe; The shaping mechanism is provided with a shaping upper die and a shaping lifting mechanism, and the shaping upper die is located below the shaping lifting mechanism; The upper mold assembly also includes a pre-pressing mechanism, which is located between the shaping mechanism and the shaping mechanism. The pre-pressing mechanism is provided with a pre-pressing upper mold and a pre-pressing lifting mechanism, and the pre-pressing upper mold is located below the pre-pressing lifting mechanism. The lower frame is provided with a lower mold assembly, which includes a pre-pressing lower mold and a shaping lower mold, a steam heating pipeline is provided in the pre-pressing lower mold, a lower heating wire is provided in the shaping lower mold, a steam suction pipe is connected to the shaping lower mold, and the steam suction pipe is connected to the steam heating pipeline; The upper mold assembly and / or the lower mold assembly is connected with a horizontal moving mechanism.

[0008] Furthermore, the lower mold assembly is connected to a movable slide, the movable slide is slidably connected to the lower frame, and a horizontal driving mechanism is arranged between the movable slide and the lower frame.

[0009] Furthermore, the pre-pressing upper die and / or the pre-pressing lower die are provided with an exhaust pipe.

[0010] Furthermore, the pre-pressing upper mold is connected to a second air intake pipe, and the shaping upper mold is connected to a third air intake pipe.

[0011] Furthermore, a material unloading conveyor belt is also arranged on the movable slide plate.

[0012] Furthermore, the steam heating pipeline is distributed in the pre-pressing lower mold in an S shape.

[0013] Furthermore, an upper heating wire is arranged in the upper shaping mold.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by adding a pre-pressing upper mold and a pre-pressing lower mold, the waste heat of steam is utilized when the molds are closed to quickly heat the newly shaped pulp blank and remove part of the moisture, so that the pulp blank has a higher temperature after entering between the shaping lower mold and the shaping upper mold, thereby reducing the temperature difference and improving the drying and shaping efficiency. As a whole, there is no need for external drying, and no additional energy consumption is added. On the contrary, due to the pre-pressing and heating process, the waste of heat caused by excessive temperature difference at the shaping place is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The three-dimensional structure of the dry-pressed pulp molding machine of the present invention Figure 1 ; Figure 2 The three-dimensional structure of the dry-pressed pulp molding machine of the present invention Figure 2 ; Figure 3 It is a front view of the dry pressing pulp molding machine of the present invention; Figure 4 The three-dimensional structure of the movable slide plate and the lower frame in the present invention Figure 1 ; Figure 5 The three-dimensional structure of the movable slide plate and the lower frame in the present invention Figure 2 ; Figure 6 It is a front view of the cooperation between the movable slide plate and the lower frame in the present invention.

[0016] Attached figures: 11, upper frame; 12, lower frame; 126, servo motor; 2, pulp tank; 31, shaping upper mold; 32, shaping lifting mechanism; 41, pre-pressing upper mold; 42, pre-pressing lifting mechanism; 43, pre-pressing lower mold; 431, steam heating pipeline; 51, shaping upper mold; 52, shaping lifting mechanism; 53, shaping lower mold; 531, steam straw; 6, moving slide plate; 61, unloading conveyor belt; 1261, gear; 62, rack. DETAILED DESCRIPTION

[0017] Reference Figures 1 to 6 The embodiment of the dry pressing pulp molding machine of the present invention is further described.

[0018] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "several" and "a number" mean two or more, unless otherwise clearly and specifically defined.

[0020] A dry-pressed pulp molding machine comprises a frame, wherein the frame comprises an upper frame 11 and a lower frame 12, an upper mold assembly is arranged on the upper frame 11, and the upper mold assembly has a shaping mechanism and a shaping mechanism. The shaping mechanism is provided with a shaping upper mold 31 and a shaping lifting mechanism 32, the shaping upper mold 31 is located below the shaping lifting mechanism 32, and the shaping upper mold 31 is located above the pulp tank 2, and the shaping upper mold 31 is connected to a first suction pipe and a blowing pipe; The shaping mechanism is provided with a shaping upper die 51 and a shaping lifting mechanism 52, and the shaping upper die 51 is located below the shaping lifting mechanism 52; The upper mold assembly also includes a pre-pressing mechanism, which is located between the shaping mechanism and the shaping mechanism. The pre-pressing mechanism is provided with a pre-pressing upper mold 41 and a pre-pressing lifting mechanism 42, and the pre-pressing upper mold 41 is located below the pre-pressing lifting mechanism 42; The lower frame 12 is provided with a lower mold assembly, which includes a pre-pressing lower mold 43 and a shaping lower mold 53. A steam heating pipeline 431 is provided in the pre-pressing lower mold 43, a lower heating wire is provided in the shaping lower mold 53, and a steam suction pipe 531 is connected to the shaping lower mold 53, and the steam suction pipe 531 is connected to the steam heating pipeline 431; The upper mold assembly and / or the lower mold assembly is connected with a horizontal moving mechanism.

[0021] In this embodiment, the upper mold assembly and the lower mold assembly move relative to each other in the horizontal direction. The lower mold assembly may be connected to a movable slide 6, which is slidably connected to the lower frame 12, and a horizontal driving mechanism is arranged between the movable slide 6 and the lower frame 12. That is, at this time, the upper mold assembly maintains a fixed position with the frame, and the lower mold assembly can move relative to the upper mold assembly.

[0022] like Figure 5 and 6 As shown, a driving motor is preferably installed on the lower frame 12, and the output end of the motor is connected to the gear 1261. A rack 62 is installed at the bottom of the movable skateboard 6. The rack 62 and the gear 1261 are meshed with each other. The position of the movable skateboard 6 is driven by the rotation of the motor, wherein the motor is a servo motor 126, which can accurately control the position.

[0023] Of course, the lower mold assembly and the frame may be kept fixed, while the upper mold assembly slides to achieve the purpose of relative movement between the upper mold assembly and the lower mold assembly.

[0024] Preferably, the pre-pressing upper mold 41 is connected to a second air intake pipe, and the shaping upper mold 51 is connected to a third air intake pipe.

[0025] The movable slide plate 6 is also provided with a material unloading conveyor belt 61 .

[0026] In this embodiment, the upper mold assembly is fixed and the lower mold assembly is movable.

[0027] The position of the shaping upper mold 31 of the upper mold assembly is the shaping station, the position of the pre-pressing upper mold 41 is the pre-pressing station, and the position of the shaping upper mold 51 is the shaping station.

[0028] S1. During operation, the shaping lower mold faces the top of the pulp tank 2, and is lowered into the pulp tank 2 through the shaping lifting mechanism 32. The first suction pipe works to absorb the pulp, so that the fibers remain on the surface of the shaping upper mold 31, and the water is sucked out. The shaping upper mold 31 moves upward and leaves the pulp tank 2. The fibers remain on the shaping upper mold 31 to be shaped to form a blank. S2, then the lower mold assembly moves forward one station, so that the pre-pressing lower mold 43 reaches below the shaping upper mold 31, that is, the pre-pressing lower mold 43 reaches the shaping station, the shaping upper mold 31 moves downward, and the blowing pipe moves to place the blank of the shaping upper mold 31 on the pre-pressing lower mold 43; S3, the lower die assembly moves back, so that the pre-pressing lower die 43 reaches below the pre-pressing upper die 41, that is, the pre-pressing lower die 43 reaches the pre-pressing station, at this time, the pre-pressing lifting mechanism 42 makes the pre-pressing upper die 41 and the pre-pressing lower die 43 close together, and hot steam is introduced into the steam heating pipeline 431 provided in the pre-pressing lower die 43 to pre-heat and dry the blank; at this time, the area below the shaping upper die 31 is empty, and step S1 can be performed; S4, after the pre-pressing is completed, the second suction pipe is actuated, the pre-pressing upper die 41 sucks air into the blank, and then the lower die assembly moves forward one station, at which time the pre-pressing lower die 43 returns to the shaping station, and the pre-pressing lower die 43 and the shaping upper die 31 perform step S2; and the shaping lower die 53 arrives at the pre-pressing station, the pre-pressing upper die 41 places the blank on the shaping lower die 53, the lower die assembly moves back, the shaping lower die 53 arrives at the shaping station, the shaping upper die 51 descends and closes with the shaping lower die 53, and the blank is completely dried and shaped by the heating of the lower heating wire. At this time, the high temperature generated by the wire causes the water in the blank to form steam, and the steam is transported to the steam heating pipeline 431 of the pre-pressing lower die 43 through the steam suction pipe 531 for use in the pre-pressing station action; S5. After the shaping is completed, the third suction pipe is activated, and the shaping upper mold 51 sucks air, and then the lower mold assembly moves forward one station. At this time, the pre-pressing lower mold 43 returns to the shaping station, the shaping lower mold 53 returns to the pre-pressing station, and the shaping upper mold 51 faces the unloading conveyor belt 61. The shaping upper mold 51 places the dried product on the unloading conveyor belt 61.

[0029] Specifically, in this embodiment, the slurry is sucked and formed at the shaping station, and the product blank is formed after the water is filtered through the shaping upper mold 31. At this time, the water content of the blank is 70%-75%; The pre-pressing time of the pre-pressing station is 20-35 seconds, and the surface temperature of the pre-pressing lower mold 43 is 70-100 degrees, which can reduce the moisture content of the blank to about 40%; The surface temperature of the shaping lower die 53 of the shaping station is 180 degrees. After 20-35 seconds, the moisture content of the blank can be reduced to 0% to achieve the shaping effect.

[0030] The efficiency is high, each station is actually running synchronously, and the pre-pressing station utilizes waste heat, which basically does not increase additional energy consumption, but can greatly reduce the waiting time of each station and the drying time of the entire product; at the same time, due to the existence of the pre-pressing station, the surface temperature of the pre-pressed blank is relatively high, which can reduce the heat loss of the shaping lower mold 53 and the shaping upper mold 51 during shaping.

[0031] In this embodiment, the pre-pressing upper die 41 and / or the pre-pressing lower die 43 are preferably provided with an exhaust pipe, which heats the blank during the pre-pressing process, and the heat generated by the blank is discharged through the exhaust pipe.

[0032] In this embodiment, the steam heating pipeline 431 is preferably distributed in an S shape in the pre-pressing lower mold 43, and the steam heating pipe covers as large an area as possible in the pre-pressing lower mold 43, so that the pre-pressing lower mold 43 receives more heat.

[0033] In the preferred embodiment of the present invention, an upper heating wire is provided in the upper shaping mold 51 , and the heating and shaping efficiency can be improved by the upper heating wire and the lower heating wire working simultaneously.

[0034] In this embodiment, the shaping lifting mechanism 32 , the pre-pressing lifting mechanism 42 and the shaping lifting mechanism 52 can all be made of cylinders.

[0035] The shaping lifting mechanism 32 may also adopt a linear motor, which can make the shaping upper mold 31 stop accurately at any specified position.

[0036] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A dry press pulp molding machine, comprising a frame, the frame comprising an upper frame and a lower frame, an upper mold assembly is arranged on the upper frame, and the upper mold assembly has a shaping mechanism and a shaping mechanism, characterized in that: The shaping mechanism is provided with a shaping upper mold and a shaping lifting mechanism, the shaping upper mold is located below the shaping lifting mechanism, and the shaping upper mold is located above the pulp tank, and the shaping upper mold is connected with a first suction pipe and a blowing pipe; The shaping mechanism is provided with a shaping upper die and a shaping lifting mechanism, and the shaping upper die is located below the shaping lifting mechanism; The upper mold assembly also includes a pre-pressing mechanism, which is located between the shaping mechanism and the shaping mechanism. The pre-pressing mechanism is provided with a pre-pressing upper mold and a pre-pressing lifting mechanism, and the pre-pressing upper mold is located below the pre-pressing lifting mechanism. The lower frame is provided with a lower mold assembly, which includes a pre-pressing lower mold and a shaping lower mold, a steam heating pipeline is provided in the pre-pressing lower mold, a lower heating wire is provided in the shaping lower mold, a steam suction pipe is connected to the shaping lower mold, and the steam suction pipe is connected to the steam heating pipeline; The upper mold assembly and / or the lower mold assembly is connected with a horizontal moving mechanism.

2. The dry pressing pulp molding machine according to claim 1, characterized in that: The lower mold assembly is connected with a movable slide, the movable slide is slidably connected with the lower frame, and a horizontal driving mechanism is arranged between the movable slide and the lower frame.

3. The dry pressing pulp molding machine according to claim 2, characterized in that: The pre-pressing upper die and / or the pre-pressing lower die are provided with an exhaust pipe.

4. The dry pressing pulp molding machine according to claim 3, characterized in that: The pre-pressing upper die is connected with a second air suction pipe, and the shaping upper die is connected with a third air suction pipe.

5. The dry pressing pulp molding machine according to claim 4, characterized in that: The movable slide plate is also provided with a material unloading conveyor belt.

6. The dry pressing pulp molding machine according to claim 5, characterized in that: The steam heating pipeline is distributed in the pre-pressing lower mold in an S shape.

7. The dry pressing pulp molding machine according to claim 6, characterized in that: An upper heating wire is arranged in the upper shaping die.

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