A pulp molding machine

Abstract

This utility model discloses a pulp molding machine, including a frame, a forming drum, a transfer drum, and a conveyor belt. A pulp tank is mounted on the frame, and the forming drum is rotatably mounted on the frame with its lower end immersed in the pulp tank. Above the pulp tank, along the rotation direction of the forming drum, the frame sequentially arranges a spraying device and a first drying device. Several forming molds are mounted on the forming drum, and each forming mold is connected to a first air pump. The transfer drum is rotatably mounted on the frame, and along the rotation direction of the transfer drum, the frame arranges a second drying device. The transfer drum is located on the side of the forming drum and has several transfer molds corresponding to the shapes of the forming molds. Each transfer mold is connected to a second air pump. The conveyor belt is located below the transfer drum. This utility model can reduce fiber shrinkage and mold repositioning errors, improve production accuracy, and increase drying efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of pulp molding equipment, and specifically relates to a pulp molding machine. Background Technology

[0002] Dry pressing is a common process in pulp molding production. It typically involves pulp absorption, dewatering, spraying, and initial drying before being transferred for final drying and molding. While dry pressing is simple and relatively energy-efficient, it requires initial air drying to a semi-dry state before secondary shaping. This results in significant fiber shrinkage and mold repositioning errors, leading to low production precision. Therefore, it is mainly used for egg trays, fruit trays, and general industrial packaging products. Furthermore, the initial drying process necessitates manual transfer for final drying and molding, resulting in low production efficiency. Therefore, to overcome these shortcomings, improvements to the existing technology are necessary. Utility Model Content

[0003] The purpose of this invention is to provide a pulp molding machine that can reduce fiber shrinkage and mold reset error, improve production accuracy, and increase drying efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A pulp molding machine includes a frame, a forming drum, a transfer drum, and a conveyor belt. A pulp tank is mounted on the frame. The forming drum is rotatably mounted on the frame, with its lower end immersed in the pulp tank. A spraying device and a first drying device are sequentially arranged on the frame along the rotation direction of the forming drum. A plurality of forming molds are mounted on the forming drum, and each forming mold is connected to a first air pump. The transfer drum is rotatably mounted on the frame. A second drying device is arranged on the frame along the rotation direction of the transfer drum. The transfer drum is located on the side of the forming drum, and a transfer station is formed at the adjacent location of the forming drum and the transfer drum. A plurality of transfer molds corresponding to the shape of the forming molds are mounted on the transfer drum, and each transfer mold is connected to a second air pump. The conveyor belt is located below the transfer drum.

[0006] As a preferred embodiment of the above-mentioned pulp molding machine, the coverage area of ​​the first drying device is from above the spraying device to the transfer station, and the coverage area of ​​the second drying device is from above the transfer station to the side of the transfer drum away from the transfer station.

[0007] As a preferred embodiment of the above-mentioned pulp molding machine, a mold washing device is provided on the side of the frame near the molding drum, and the mold washing device is located below the transfer station.

[0008] As a preferred embodiment of the above-mentioned pulp molding machine, the frame is provided with a plurality of first air pumps, each of which is connected to one of the molding dies, and the frame is provided with a plurality of second air pumps, each of which is connected to one of the transfer dies.

[0009] As a preferred embodiment of the above-mentioned pulp molding machine, the molding drum is provided with eight molding molds, and the transfer drum is provided with eight transfer molds.

[0010] As a preferred embodiment of the above-mentioned pulp molding machine, the molding die at the bottom of the molding drum can be completely submerged in the pulp tank.

[0011] The advantages of implementing the pulp molding machine provided by this utility model compared with the prior art are as follows:

[0012] The lower end of the forming drum of this invention is immersed in a pulp tank, and the forming mold is connected to a first air pump. The first air pump draws air from the pulp tank into the forming mold, where it is shaped and dewatered. Then, it is sprayed by a spraying device to enhance fiber bonding and adhesion. The frame is arranged with a spraying device and a first drying device along the rotation direction of the forming drum for preliminary drying after spraying. A transfer drum is located on the side of the forming drum, and the transfer mold is connected to a second air pump. At the adjacent point of the transfer drum and the forming drum, the first air pump blows air to detach the pulp product from the forming mold, and the second air pump blows air to allow the detached pulp product to be adsorbed onto the transfer mold, completing the transfer. The transfer mold corresponds in shape to the forming mold, allowing lighter pulp products to be adsorbed and transferred in a conformal shape. By setting up the transfer drum... The pulp products on the forming drum are transferred automatically, improving work efficiency. A conveyor belt is located below the transfer drum. When the transfer mold rotates with the transfer drum to above the conveyor belt, a second air pump blows air to detach the pulp products from the transfer mold and transfer them to the conveyor belt for transport, improving handling and transfer efficiency. A second drying device is set along the rotation direction of the transfer drum, so that the pulp products on the transfer mold can be dried while the transfer drum is rotating, improving drying efficiency. Moreover, since the pulp products are dried in the mold, they can fully extend and tightly adhere to the mold surface when heated and pressed in the mold, forming smooth and flat details. The pulp fibers are in a highly plastic state, which not only reduces fiber shrinkage and mold reset error, improving production accuracy, but also improves the surface quality of the pulp products. In addition, the simultaneous transfer and drying also improves drying efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0014] Figure 1 This is a schematic diagram of the internal structure of the pulp molding machine of this utility model from the front.

[0015] Figure 2 This is a schematic diagram of the internal structure of the pulp molding machine after the hidden frame shell is installed.

[0016] Figure 3 yes Figure 2 A magnified view of a portion of the forming drum;

[0017] Figure 4 This is a front view of the rotating ring on the forming drum of this utility model after it is paired with the stationary ring on the first air pump;

[0018] Figure 5 This is a front view of the forming drum of this utility model.

[0019] Marked in the image:

[0020] 100. Frame; 110. Slurry tank; 120. Spraying device; 130. First drying device; 140. Transfer station; 150. Second drying device; 160. Mold washing device; 200. Forming drum; 210. Forming mold; 220. First air pump; 300. Transfer drum; 310. Transfer mold; 320. Second air pump; 400. Conveyor belt; 500. Servo motor; 600. Stationary ring; 610. Moving ring. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] Please refer to the following: Figures 1 to 5 The pulp molding machine provided in the embodiments of this utility model will now be described.

[0026] like Figures 1 to 5 As shown, the pulp molding machine of this utility model includes a frame 100, a molding drum 200, a transfer drum 300, and a conveyor belt 400. A pulp tank 110 is mounted on the frame 100. The molding drum 200 is rotatably mounted on the frame 100, with its lower end immersed in the pulp tank 110. Above the pulp tank 110, the frame 100 is sequentially equipped with a spraying device 120 and a first drying device 130 along the rotation direction of the molding drum 200. A plurality of molding molds 210 are mounted on the molding drum 200, and the molding molds 210 are connected to a first... An air pump 220 is provided. The transfer drum 300 is rotatably mounted on the frame 100. The frame 100 is provided with a second drying device 150 along the rotation direction of the transfer drum 300. The transfer drum 300 is located on the side of the forming drum 200. The adjacent positions of the forming drum 200 and the transfer drum 300 form a transfer station 140. The transfer drum 300 is provided with a plurality of transfer molds 310 corresponding to the shape of the forming mold 210. The transfer molds 310 are connected to the second air pump 320. The conveyor belt 400 is located below the transfer drum 300.

[0027] By connecting the first air pump 220 to the forming mold 210 and the second air pump 320 to the transfer mold 310, the pulp products can be transferred from the forming drum 200 to the transfer drum 300, thus automating the transfer of the pulp products, saving labor costs and improving transfer efficiency. By setting a second drying device 150 in the rotation direction of the transfer drum 300, the pulp products can be dried while being transferred, thereby improving drying efficiency.

[0028] Specifically, the forming drum 200 and the transfer drum 300 are driven to rotate by a servo motor 500. A first air pump 220 is installed at the front end of the forming drum 200, and a servo motor 500 is installed at the rear end. The output end of the servo motor 500 is connected to the forming drum 200 to drive its rotation. Figures 3-5 As shown, a stationary ring 600 is fixedly connected to the first air pump 220, and a rotating ring 610 is fixedly connected to the forming drum 200. The stationary ring 600 is fixed to the first air pump 220, and the rotating ring 610 rotates with the forming drum 200. Both the stationary ring 600 and the rotating ring 610 have matching channel holes. The channel hole near the transfer station 140 is connected to the compressed air end of the first air pump 220, and the other channel holes are connected to the vacuum end of the first air pump 220, thereby realizing the blowing of air to the forming mold 210 near the transfer station 140 and the suction of air to the forming mold 210 in other positions. The driving principle of the transfer drum 300 is the same. The first air pump 220 and the second air pump 320 can be double-acting piston pumps or diaphragm pumps to realize blowing and suction, which will not be described in detail here.

[0029] For example, the coverage area of ​​the first drying device 130 is from above the spraying device 120 to the transfer station 140, and the coverage area of ​​the second drying device 150 is from above the transfer station 140 to the side of the transfer drum 300 away from the transfer station 140. The first drying device 130 starts drying the pulp molded product after spraying, and the second drying device 150 has a wide coverage area and dries the pulp product while it is being transferred, improving drying efficiency. Moreover, since the pulp product is dried in the transfer mold 310, it can fully stretch and tightly adhere to the mold surface when heated and pressed in the mold, forming a smooth and flat surface. The pulp fibers are in a highly plastic state, which not only reduces fiber shrinkage and mold reset error, but also improves production accuracy.

[0030] For example, the distance between the transfer mold 310 and the forming mold 210 at the transfer station 140 is less than the thickness of the forming mold 210. The distance between the transfer mold 310 and the forming mold 210 at the transfer station 140 is close enough to ensure that the pulp product demolded from the forming mold 210 can be smoothly transferred to the transfer mold 310. The distance between the transfer mold 310 and the forming mold 210 at the transfer station 140 is less than the thickness of the forming mold 210 to ensure that the pulp product after being removed from the forming mold 210 will not fall down through the gap between the forming mold 210 and the transfer mold 310.

[0031] It should be noted that in actual production, due to the light weight of pulp products, they can be successfully transferred at the transfer station 140 by the pressure of the first air pump 220 and the suction of the second air pump 320. Even if the distance between the transfer mold 310 and the forming mold 210 at the transfer station 140 is greater than the thickness of the forming mold 210, the pulp products are not easy to fall down from the gap between the forming mold 210 and the transfer mold 310.

[0032] Specifically, an ejector device can be provided on the forming mold 210 to assist the transfer of pulp products from the forming mold 210 to the transfer mold 310. For the specific principle, please refer to the patent document CN101781871B, which will not be elaborated here.

[0033] For example, a mold washing device 160 is provided on the side of the frame 100 near the forming drum 200, and the mold washing device 160 is located below the transfer station 140. After the forming mold 210 completes the transfer of the pulp product, the mold washing device 160, located below the transfer station 140, can clean the pulp product remaining on the forming mold 210, facilitating the subsequent re-intake of pulp into the pulp tank 110 for a new round of pulp product molding.

[0034] For example, the frame 100 is provided with a plurality of first air pumps 220, each of the first air pumps 220 being connected to one of the forming molds 210, and the frame 100 is provided with a plurality of second air pumps 320, each of the second air pumps 320 being connected to one of the transfer molds 310. Each first air pump 220 can independently control the blowing and suction of each forming mold 210, ensuring that when the forming mold 210 is in the pulp tank 110, it can be sucked in by the first air pump 220 to draw in the pulp in the pulp tank 110, and ensuring that when the forming mold 210 is at the transfer station 140, it can be blown by the first air pump 220 to complete the demolding of the pulp product; similarly, each second air pump 320 can independently control the blowing and suction of each transfer mold 310, ensuring that when the transfer mold 310 is at the transfer station 140, it can be sucked in by the second air pump 320 to adsorb the pulp product, and ensuring that when the transfer mold 310 is above the conveyor belt 400, it can be blown by the second air pump 320 to demold the pulp product and transfer it onto the conveyor belt 400.

[0035] For example, the forming drum 200 is provided with eight forming molds 210, and the transfer drum 300 is provided with eight transfer molds 310. The eight forming molds 210 allow the forming drum 200 to stop rotating for a period of time after each 45-degree rotation, giving the forming molds 210 located at different positions on the forming drum 200 sufficient time to complete the processes of slurry suction, dewatering, spraying, drying, and transfer.

[0036] For example, the forming mold 210 at the bottom of the forming drum 200 can be completely immersed in the pulp tank 110. This ensures that the forming mold 210 can fully absorb pulp when absorbing it in the pulp tank 110, resulting in full pulp products and improving the quality of the pulp products.

[0037] The advantages of implementing the pulp molding machine provided by this utility model compared with the prior art are as follows:

[0038] The lower end of the forming drum 200 of this invention is immersed in the pulp tank 110, and the forming mold 210 is connected to a first air pump 220. The first air pump 220 draws air from the pulp tank 110 to draw pulp into the lower forming mold 210 for shaping. After drawing in the pulp, it undergoes dewatering, and then is sprayed by a spraying device 120 to enhance fiber bonding and adhesion strength. The frame 100 is sequentially equipped with the spraying device 120 and a first drying device 130 along the rotation direction of the forming drum 200. After spraying, preliminary drying is performed, and the pulp is then transferred... A rotating drum 300 is positioned on the side of the forming drum 200. A transfer mold 310 is connected to a second air pump 320. At the adjacent points of the transfer drum 300 and the forming drum 200, the first air pump 220 blows air to detach the pulp product from the forming mold 210. The second air pump 320 then blows air to allow the detached pulp product to be adsorbed onto the transfer mold 310, completing the transfer. Furthermore, the transfer mold 310 corresponds in shape to the forming mold 210, allowing lighter pulp products to be adsorbed and transferred in a conformal manner. The transfer mold 310, through the transfer drum 300, transfers the pulp products on the forming drum 200, achieving automated transfer and improving work efficiency. The conveyor belt 400 is positioned below the transfer drum 300. When the transfer mold 310 rotates with the transfer drum 300 to above the conveyor belt 400, the second air pump 320 blows air to detach the pulp products from the transfer mold 310 and transfer them to the conveyor belt 400 for transport, improving handling and transfer efficiency. A second drying device 150 is installed on the frame 100 along the rotation direction of the transfer drum 300. When the transfer drum 300 rotates, the pulp products on the transfer mold 310 can be transferred and dried simultaneously, improving the drying efficiency. Moreover, since the pulp products are dried in the transfer mold 310, they can fully stretch and tightly adhere to the mold surface when heated and pressed inside the mold, forming smooth and flat details. The pulp fibers are in a highly plastic state, which not only reduces fiber shrinkage and mold reset error, improving production accuracy, but also enhances the surface quality of the pulp products. Furthermore, the simultaneous transfer and drying also improves the drying efficiency.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principle of the present utility model, and these improvements and substitutions should also be considered as protection of the present utility model.

Claims

1. A pulp moulding machine, characterised in that include: A frame, on which a pulp tank is mounted; A forming drum is rotatably mounted on the frame. The lower end of the forming drum is immersed in the slurry tank. The frame is provided with a spraying device and a first drying device in sequence along the rotation direction of the forming drum. A plurality of forming molds are provided on the forming drum, and the forming molds are connected to a first air pump. A transfer drum is rotatably mounted on the frame. A second drying device is provided on the frame along the rotation direction of the transfer drum. The transfer drum is located on the side of the forming drum. A transfer station is formed at the adjacent position of the forming drum and the transfer drum. A plurality of transfer molds corresponding to the shape of the forming mold are provided on the transfer drum. The transfer molds are connected to a second air pump. A conveyor belt is disposed below the transfer drum.

2. The pulp molding machine according to claim 1, characterized in that The coverage area of ​​the first drying device is from above the spray device to the transfer station, and the coverage area of ​​the second drying device is from above the transfer station to the side of the transfer drum away from the transfer station.

3. A pulp moulding machine according to claim 2, characterised in that A mold washing device is provided on the side of the frame near the forming drum, and the mold washing device is located below the transfer station.

4. The pulp molding machine according to any one of claims 1 to 3, characterized in that The frame is provided with a plurality of first air pumps, each of which is connected to one of the forming molds. The frame is also provided with a plurality of second air pumps, each of which is connected to one of the transfer molds.

5. A pulp moulding machine according to claim 4, characterised in that The forming drum is provided with eight forming molds, and the transfer drum is provided with eight transfer molds.

6. A pulp moulding machine according to claim 5, characterised in that The molding mold at the bottom of the molding drum can be completely submerged in the slurry tank.

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