A pulp molding production device

Abstract

The utility model relates to a molding production technical field especially relates to a paper pulp molding production device, including work table, drying box, hot air machine and dehumidifier, the bottom of drying box is equipped with the turntable by motor drive, the hot air machine passes through the ventilation box, ventilation hood and porous plate to drying box inside delivery hot air, the rotatable air uniformity board of ventilation hood below is equipped with by step motor drive, drying box lower part passes through the pipeline connection dehumidifier, and dehumidifier export passes through the three -way pipe and is connected hot air machine air inlet and atmospheric environment respectively, the utility model discloses through the cooperation of rotary turntable and dynamic air uniformity board, has realized the even drying of paper pulp molding product, has formed a three -dimensional, dead angleless dynamic drying area, and simultaneously through the dispersion of hot air into innumerable strands of small air current by porous plate, then passes through the secondary distribution of air uniformity board, avoided the direct impact of strong wind to the paper pulp molding product still in the wet soft state, effectively prevented the crack or deformation of product surface, improved drying quality.

Description

Technical Field

[0001] This utility model relates to the field of molding production technology, and in particular to a pulp molding production device. Background Technology

[0002] Pulp molding is a three-dimensional papermaking technology that uses waste paper as raw material. It uses special molds on a molding machine to create paper products of a certain shape. It has four major advantages: the raw material is waste paper, including cardboard, waste cardboard, and waste white edge paper, which are widely available. The production process is completed by pulping, adsorption molding, drying and shaping, etc., which is harmless to the environment; it can be recycled and reused; and it is smaller in volume than foamed plastics, can be stacked, and is convenient for transportation.

[0003] Pulp molding includes egg cartons, egg trays, fruit trays, flower pots, and disposable medical bedpans. It uses waste paper as raw material, adds some moisture-proof or waterproof agents, and then makes various shapes of molded products according to different uses. It is used as packaging lining for eggs, fruits, precision parts, fragile glass and ceramic products, handicrafts, etc., and has good cushioning and protective properties. According to the search, Chinese patent CN218291449U is disclosed. This utility model uses a hot air blower to directly dry the pulp mold through all the air hoods. However, this method will result in uneven distribution of hot air, which will cause uneven heating of the product, dead corners, and cracks or deformation on the surface of the pulp mold, affecting the drying quality. Therefore, this utility model proposes a pulp molding production device. Utility Model Content

[0004] Technical problem to be solved: Existing technology uses a hot air blower to directly dry the pulp mold through all the air hoods, but this method results in uneven distribution of hot air, leading to uneven heating of the products, dead corners, and easy cracks or deformation on the surface of the pulp mold, affecting the drying quality.

[0005] To achieve the above objectives, this utility model proposes a pulp molding production device, including a workbench, a drying oven, a hot air blower, and a dehumidifier. The drying oven is fixedly installed on the workbench, and a first motor is located at the center of its bottom. The output end of the first motor is connected to a turntable via a drive shaft. The hot air blower is located outside the drying oven, and its air outlet is connected to a first ventilation pipe. The first ventilation pipe extends to the top of the drying oven and connects to a ventilation box. The bottom of the ventilation box is provided with multiple ventilation hoods, and each ventilation hood has a perforated plate at its outlet. A rotatable air distribution plate is provided below the ventilation hood, and the air distribution plate is driven by a micro stepper motor.

[0006] In one example, a second ventilation pipe is connected to the lower side wall of the drying oven, and the second ventilation pipe is connected to the air inlet of the dehumidifier; the air outlet of the dehumidifier is connected to a three-way pipe through a third ventilation pipe, one outlet of the three-way pipe is connected to the air inlet of the hot air blower, and the other outlet is connected to the atmospheric environment.

[0007] In one example, the first motor is a variable frequency motor.

[0008] In one example, the turntable has a circular groove for placing pulp molding, and the circular groove is uniformly provided with a plurality of ventilation holes.

[0009] In one example, the ventilation hood is frustum-shaped and evenly distributed at the bottom of the ventilation box.

[0010] In one example, the wind distribution plate can be rotated or angularly oscillated.

[0011] In one example, a removable filter is installed at the inlet of the second ventilation duct.

[0012] In one example, the two inlet ends of the tee are equipped with regulating valves.

[0013] In one example, the inner wall of the drying oven is provided with a layer of heat-insulating material.

[0014] The pulp molding production apparatus proposed in this utility model has the following beneficial effects: 1. In this utility model, the rotation of the turntable ensures that the pulp molding can be blown at all angles on the horizontal plane, while the swinging or rotating of the air distribution plate changes the vertical distribution pattern of the hot air. The combination of the two forms a three-dimensional, dynamic drying area without dead angles.

[0015] In this invention, hot air is first dispersed into numerous fine airflows through a perforated plate, becoming uniform and gentle. Then, it undergoes secondary distribution through an air distribution plate, preventing strong winds from directly impacting the still-soft pulp molded product. This effectively prevents cracks or deformation from appearing on the product surface. 3. In this utility model, the dynamic air supply method enables more thorough heat exchange between hot air and the molded surface of pulp, reducing the waste of heat accumulation in a certain area, thereby improving the thermal energy utilization efficiency of the entire system. At the same time, through the combined use of the hot air circulation system and the dehumidifier, the humid and hot exhaust gas is partially recycled after dehumidification, which significantly reduces energy consumption and meets the requirements of energy conservation and environmental protection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 for Figure 1 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the perforated plate structure of this utility model; Figure 5 This is a schematic diagram of the wind distribution plate structure of this utility model.

[0017] The attached figures are labeled as follows: 1. Workbench; 2. Drying oven; 3. First motor; 4. Drive shaft; 5. Turntable; 6. Hot air blower; 7. First ventilation duct; 8. Ventilation box; 9. Ventilation hood; 10. Perforated plate; 11. Second ventilation duct; 12. Dehumidifier; 13. Third ventilation duct; 14. T-connector; 17. Regulating valve; 18. Air distribution plate; 19. Miniature stepper motor. Detailed Implementation

[0018] To more clearly illustrate the overall concept of this utility model, a detailed description is provided below with reference to the accompanying drawings.

[0019] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

[0023] like Figures 1-5 As shown in the figure, an embodiment of this utility model proposes a pulp molding production device, which includes a workbench 1 on which a drying chamber 2 is fixedly installed. A first motor 3 (in this example, a variable frequency motor) is mounted on the bottom center of the drying chamber 2 via a bracket. The output end of the first motor 3 is connected to a turntable 5 via a drive shaft 4. Considering that the bottom of the molded wet pulp has a higher moisture content and is not easy to dry, the molded wet pulp product is placed on the turntable 5 with the bottom facing up. Starting the first motor 3 can drive the turntable 5 to rotate slowly at a speed of 2-5 revolutions per minute.

[0024] A hot air blower 6 is placed on one side of the workbench 1, and its air outlet is connected to a first ventilation pipe 7. The first ventilation pipe 7 extends to the top of the drying oven 2 and connects to a horizontally arranged ventilation box 8. Multiple downward-opening ventilation hoods 9 are welded to the bottom of the ventilation box 8. A perforated plate 10 is fixedly installed at the outlet of each ventilation hood 9. The hot air generated by the hot air blower 6 enters the ventilation box 8 through the first ventilation pipe 7, and is then dispersed into countless fine airflows by the perforated plates 10 of each ventilation hood 9, becoming uniform and gentle.

[0025] Below the multiple ventilation hoods 9, symmetrically arranged rotatable air distribution plates 18 are provided. The air distribution plates 18 are driven by a micro stepper motor 19 via a coupling, allowing for slow rotation at 5-10 rpm or oscillation within ±30 degrees. The air distribution plates 18 are equipped with nozzles, which continuously change direction, creating a dynamic flow field within the drying chamber 2 rather than a static one. This dynamic airflow breaks down the temperature stratification and humidity barriers that static airflow may create, allowing for more thorough heat exchange between the hot air and the molded pulp surface, thus improving thermal efficiency.

[0026] An outlet is provided on the lower side wall of the drying chamber 2, connecting to a second ventilation duct 11. A removable filter is installed at the inlet of the second ventilation duct 11 to prevent paper fibers from being carried away. The second ventilation duct 11 is connected to the air inlet of the dehumidifier 12. The air outlet of the dehumidifier 12 is connected to a third ventilation duct 13, and the other end of the third ventilation duct 13 is connected to a T-junction 14. One outlet of the T-junction 14 is connected to the air inlet of the hot air blower 6 via a pipe, and the other outlet is open to the atmospheric environment. Regulating valves 17 are installed at both inlet ends of the T-junction 14 to adjust the mixing ratio of the recirculated dry air and the supplementary fresh air.

[0027] To improve heat preservation performance, a layer of insulation cotton is pasted on the inner wall of drying oven 2 as an insulation material layer.

[0028] Work process: The wet pulp molded product is placed upside down on the turntable 5. The hot air blower 6, the first motor 3, and the micro stepper motor 19 are started. The hot air generated by the hot air blower 6 enters the ventilation box 8 through the first ventilation pipe 7, and is then dispersed into countless fine airflows by the perforated plates 10 of each ventilation hood 9, becoming uniform and gentle. After secondary distribution by the air distribution plate 18, the airflow is dynamically evenly distributed and then blown onto the rotating product for drying, avoiding the direct impact of strong winds on the still wet and soft pulp molded product. The wet and hot exhaust gas is drawn into the dehumidifier 12 through the second ventilation pipe 11, and becomes dry and hot air after removing the moisture. This part of the dry and hot air flows back to the air inlet of the hot air blower 6 through the three-way pipe 14, mixes with fresh air, and is reheated for reuse, thereby saving energy.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulp molding production apparatus, comprising a workbench (1), a drying oven (2), a hot air blower (6), and a dehumidifier (12), characterized in that: The drying box (2) is fixedly installed on the workbench (1), and a first motor (3) is provided at the center of its bottom. The output end of the first motor (3) is connected to the turntable (5) through the drive shaft (4). The hot air blower (6) is set outside the drying box (2), and its air outlet is connected to the first ventilation pipe (7). The first ventilation pipe (7) extends to the top of the inside of the drying box (2) and is connected to the ventilation box (8). The bottom of the ventilation box (8) is provided with multiple ventilation hoods (9), and each ventilation hood (9) is equipped with a perforated plate (10) at its outlet. A rotatable air distribution plate (18) is provided below the ventilation hood (9), and the air distribution plate (18) is driven by a micro stepper motor (19).

2. The pulp molding production apparatus according to claim 1, characterized in that, The lower side wall of the drying box (2) is connected to the second ventilation pipe (11), which is connected to the air inlet of the dehumidifier (12). The air outlet of the dehumidifier (12) is connected to the three-way pipe (14) through the third ventilation pipe (13). One outlet of the three-way pipe (14) is connected to the air inlet of the hot air blower (6), and the other outlet is connected to the atmospheric environment.

3. The pulp molding production apparatus according to claim 1, characterized in that, The first motor (3) is a variable frequency motor.

4. The pulp molding production apparatus according to claim 1, characterized in that, The turntable (5) is provided with a circular groove for placing pulp molding, and the circular groove is provided with multiple ventilation holes evenly distributed.

5. The pulp molding production apparatus according to claim 1, characterized in that, The ventilation hood (9) is truncated cone-shaped and is evenly distributed at the bottom of the ventilation box (8).

6. The pulp molding production apparatus according to claim 1, characterized in that, The air distribution plate (18) can be rotated or angularly oscillated.

7. The pulp molding production apparatus according to claim 2, characterized in that, The inlet of the second ventilation duct (11) is equipped with a removable filter screen.

8. A pulp molding production apparatus according to claim 2, characterized in that, The two inlet ends of the tee pipe (14) are equipped with regulating valves (17).

9. A pulp molding production apparatus according to claim 1, characterized in that, The inner wall of the drying oven (2) is provided with a heat insulation material layer.

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