Paper pulp molding device and molding method

Abstract

The invention discloses a paper pulp molding device which comprises a rack, a paper pulp groove and a molding mechanism are arranged on the rack, the molding mechanism comprises a horizontal linear guide rail, a sliding plate, a horizontal driving mechanism, a shaping mechanism and a shaping mechanism, a coating groove is formed in the position, beside the paper pulp groove, of the rack, and the coating groove is used for containing a coating solution. Functional paint is sucked in before paper pulp molding, so that the paint permeates into the interior and the surface of a mold, after complete drying and molding, secondary processing is not needed, the paint can be distributed on the surface of a product and can also be distributed in the product at the same time, and for fireproof paint, the paint can be uniformly sprayed on the surface and the surface of the product. And the fireproof performance of the whole paper pulp molding is stronger.

Description

Technical Field

[0001] The invention belongs to the technical field of pulp molding, and more specifically relates to a pulp molding device and a molding method. 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] For example, a Chinese patent with publication number CN116837664A discloses a pulp forming device and a pulp forming method, wherein the pulp forming device comprises: a pulp depositing device, a hot pressing forming device and a cutting device; a first transfer device, a second transfer device and a third transfer device, wherein the first transfer device is arranged between the pulp depositing device and the hot pressing forming device and is suitable for transferring the pulp scooping mesh plate to the pulp depositing device and the hot pressing forming device; the second transfer device is arranged between the pulp depositing device and the cutting device and is suitable for transferring the pulp mold blank on the pulp scooping mesh plate of the first transfer device to the third transfer device; the third transfer device is suitable for loading or removing the pulp mold blank into or out of the cutting device, and transferring the pulp mold blank to the pulp mold blank output device.

[0004] Another example is a Chinese patent with publication number CN114505199A, which discloses a pulp molded lunch box spraying production line, which relates to the pulp molded lunch box production technology field. The technical solution includes a first spraying system, a flip transfer mechanism, and a second spraying system. The first spraying system is used to spray the inner surface of the pulp molded lunch box, and the second spraying system is used to spray the outer surface of the pulp molded lunch box. The spraying system includes a rotating adsorption mechanism, and the rotating adsorption mechanism includes a rotatable adsorption template.

[0005] The above two patented technologies are respectively for forming pulp into products and spraying thin film coatings on the surface of products. The sprayed thin film coatings generally have functions such as fireproofing, water-proofing and oil-proofing. For example, when producing pulp tableware, the pulp is usually formed first, and after it is completely dried and formed, it is transferred to the spraying equipment for coating. The coating can make the tableware have a certain fireproof effect during storage and transportation, and has a waterproof and oil-proof effect when in use. However, the production process is cumbersome and requires the transfer of products between different equipment or even different manufacturers, and can only be sprayed on the surface of the tableware. For flammable paper, the fire retardant coating cannot penetrate into the interior. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a method for absorbing functional coatings before pulp molding, so that the coatings can penetrate into the mold and surface. After complete drying and molding, no secondary processing is required. The coatings can be distributed both on the surface of the product and inside the product. For fire-retardant coatings, the fire-retardant performance of the entire pulp molding can be enhanced.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pulp molding device, comprising a frame, a pulp tank and a molding mechanism are arranged on the frame, the molding mechanism comprises a horizontal linear guide rail, a slide plate, a horizontal driving mechanism, a shaping mechanism and a shaping mechanism, one end of the horizontal linear guide rail extends to the top of the pulp tank to form a shaping station, and the other end extends to the outside of the pulp tank to form a shaping station and a material unloading station, the shaping mechanism and the shaping mechanism are installed on the slide plate, and the horizontal driving mechanism connects the horizontal linear guide rail and the slide plate; The shaping mechanism comprises a shaping upper die and a shaping lifting mechanism, the shaping upper die is located below the shaping lifting mechanism, and the shaping upper die is connected with an air suction pipe and an air blowing pipe; The shaping mechanism comprises a shaping upper die, a shaping lower die and a shaping lifting mechanism, wherein the shaping upper die is located below the shaping lifting mechanism, the shaping lower die is located at a corresponding shaping station on the frame, and a separation air pipe is connected to the shaping upper die; The lower shaping mold is connected with a steam straw, and a lower heating wire is arranged on the lower shaping mold; A coating tank is arranged on the frame corresponding to the pulp tank, and the coating tank is used to contain the coating solution. A coating station is arranged above the linear guide rail corresponding to the coating tank.

[0008] Furthermore, the coating station is located between the shaping station and the shaping station.

[0009] Furthermore, a cleaning pipe is arranged in the pulp tank, and a plurality of cleaning nozzles are arranged on the cleaning pipe.

[0010] Furthermore, a slide rail is provided on the pulp tank, a cleaning pipe is slidably connected to the slide rail, and the cleaning pipe is connected to a cleaning drive mechanism.

[0011] Furthermore, an inclined blanking plate is provided at the blanking station, one end of the blanking plate is hinged to the frame, an adjustment hole is provided on the side of the blanking plate, and an adjustment rod is provided between the adjustment hole of the blanking plate and the frame.

[0012] A pulp molding method comprises the following steps: S1. Shaping: The shaping mechanism moves to the shaping station to allow the shaping upper die to enter the pulp tank, and negative pressure is generated through the suction pipe, so that the pulp passes through the shaping upper die, and the fibers are intercepted and attached to the shaping upper die to be shaped into a blank; S2. Coating penetration: The shaping mechanism carries the blank to the coating area and allows the blank to enter the coating tank. Negative pressure is generated through the suction pipe, allowing the coating solution to enter the surface and interior of the blank. S3, shaping: The shaping mechanism carries the blank to the shaping station, makes the blank contact the shaping lower die, and the pressure is generated by the blowing pipe to place the blank completely on the shaping lower die. Then the shaping upper die returns to the shaping station, and the shaping upper die arrives at the shaping station and is molded with the shaping lower die. The blank is heated and dried to shape it through the action of the upper heating wire and the lower heating wire. The steam suction pipe also absorbs the steam generated during the heating process. S4, unloading: The separation air pipe connected to the shaping upper mold sucks air, sucks up the shaped product and transfers it to the unloading station, and the product slides from the unloading plate to the designated position for collection.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the pulp liquid in the pulp tank can be sucked away by the suction pipe connected to the shaping upper mold, and the fibers can be left on the shaping upper mold. The amount of pulp liquid sucked by the suction pipe can be controlled according to the required thickness of the pulp model, and before the blank is completely dried, it enters the coating tank, and the suction pipe works again to absorb the coating solution and immerse it into the blank, which is dried and formed in the subsequent forming station. At the same time, the pulp and coating solution are heated and dried. After forming, the interior and surface of the product have functional coatings, and no secondary processing is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The three-dimensional structure of the pulp molding device of the present invention Figure 1 ; Figure 2 The three-dimensional structure of the pulp molding device of the present invention Figure 2 ; Figure 3 The three-dimensional structure of the pulp molding device of the present invention Figure 3 ; Figure 4 It is a front view of the pulp molding device of the present invention.

[0015] Figure numerals: 1. Frame; 21. Pulp tank; 211. Cleaning pipe; 212. Cleaning nozzle; 22. Paint tank; 3. Horizontal linear guide rail; 4. Slide plate; 5. Shaping mechanism; 51. Shaping upper mold; 52. Shaping lifting mechanism; 53. Air suction pipe; 54. Air blowing pipe; 6. Shaping mechanism; 62. Shaping lifting mechanism; 63. Separation air pipe; 64. Shaping lower mold; 641. Steam suction pipe; 65. Shaping upper mold; 7. Unloading plate; 71. Adjustment hole; 72. Adjustment rod; 8. Horizontal driving mechanism. DETAILED DESCRIPTION

[0016] Reference Figures 1 to 4The embodiments of the direct drop molding device and molding method of the present invention are further described.

[0017] 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.

[0018] 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.

[0019] A pulp molding device comprises a frame 1, on which a pulp tank 21 and a molding mechanism are arranged, wherein the molding mechanism comprises a horizontal linear guide rail 3, a slide plate 4, a horizontal driving mechanism 8, a shaping mechanism 5 and a shaping mechanism 6, wherein one end of the horizontal linear guide rail 3 extends to the top of the pulp tank 21 to form a shaping station, and the other end extends to the outside of the pulp tank 21 to form a shaping station and a material unloading station, the shaping mechanism 5 and the shaping mechanism 6 are mounted on the slide plate 4, and the horizontal driving mechanism 8 connects the horizontal linear guide rail 3 and the slide plate 4; The shaping mechanism 5 includes a shaping upper die 51 and a shaping lifting mechanism 52. The shaping upper die 51 is located below the shaping lifting mechanism 52. The shaping upper die 51 is connected to an air suction pipe 53 and an air blowing pipe 54. The air suction pipe 53 is connected to a vacuum pump, and the air blowing pipe 54 is connected to a compressed air machine.

[0020] The shaping mechanism 6 includes a shaping upper die 65, a shaping lower die 64 and a shaping lifting mechanism 62. The shaping upper die 65 is located below the shaping lifting mechanism 62. The shaping lower die 64 is located at a corresponding shaping station on the frame 1. The shaping upper die 65 is connected to a separation air pipe 63. A steam suction pipe 641 is connected to the lower molding die 64 , and a vacuum pump is connected to the steam suction pipe 641 . The steam suction pipe 641 can be connected to the same vacuum pump as the suction pipe 53 , and the on-off of each is controlled by a valve body. A lower heating wire is also connected to the lower molding die 64 .

[0021] The lower shaping mold 64 is connected to a steam suction pipe 641, and a lower heating wire is arranged on the lower shaping mold 64; A coating tank 22 is arranged on the frame 1 corresponding to the pulp tank 21, and the coating tank 22 is used to contain the coating solution. The coating station is arranged above the linear guide corresponding to the coating tank 22, and the coating tank 22 is connected to a coating delivery pipe, through which the coating can be continuously delivered to the coating tank 22.

[0022] The pulp tank 21 is connected to a pulp liquid conveying pipe, through which pulp liquid can be continuously conveyed into the pulp tank 21 .

[0023] Preferably, the shaping lifting mechanism 52, the horizontal driving mechanism 8 and the shaping lifting mechanism 62 are all cylinders.

[0024] In this embodiment, the coating station is preferably located between the shaping station and the forming station, and the forming station is located between the coating station and the unloading station.

[0025] The shaping upper mold 51 is a porous filter structure that allows water to pass through and intercepts fibers in the pulp liquid. During the continuous suction process of the suction pipe 53, the water in the pulp tank 21 is extracted, and at the same time, the fibers are stacked on the shaping upper mold 51 to be shaped into a blank.

[0026] In the preferred embodiment of the present invention, a cleaning pipe 211 is provided in the pulp tank 21 , and a plurality of cleaning nozzles 212 are provided on the cleaning pipe 211 .

[0027] The cleaning pipe 211 is connected to the clean water tank through a water pump. When the water pump is working, clean water or cleaning agent is sprayed upward through the nozzle to clean the shaping upper mold 51 and flush away the fibers adhered to the shaping upper mold 51 to avoid clogging of the shaping upper mold 51 or the shaping upper mold 51 cannot shape the pulp well.

[0028] Preferably, a slide rail is provided on the pulp tank 21, and the cleaning pipe 211 is slidably connected to the slide rail, and the cleaning pipe 211 is connected to a cleaning drive mechanism.

[0029] The cleaning drive mechanism can be a cylinder or a linear motor, etc. When cleaning, the cleaning tube 211 can be moved to achieve comprehensive cleaning of the surface of the shaping upper mold 51.

[0030] Preferably, an inclined blanking plate 7 is provided at the blanking station, one end of the blanking plate 7 is hinged to the frame 1 , an adjustment hole 71 is provided on the side of the blanking plate 7 , and an adjustment rod 72 is provided between the adjustment hole 71 of the blanking plate 7 and the frame 1 .

[0031] By connecting the adjusting rod 72 to different positions of the adjusting hole 71, the inclination angle of the unloading plate 7 can be adjusted to control the speed of product unloading and change the guiding direction.

[0032] A pulp molding method comprises the following steps: S1, shaping: the shaping mechanism 5 moves to the shaping station to make the shaping upper die 51 enter the pulp tank 21, and the suction pipe 53 generates negative pressure, so that the pulp passes through the shaping upper die 51, and the fibers are intercepted and attached to the shaping upper die 51 to be shaped into a blank; S2, coating penetration: the shaping mechanism 5 carries the blank to the coating area and allows the blank to enter the coating tank 22, and negative pressure is generated through the suction pipe 53, so that the coating solution enters the surface and interior of the blank; S3, shaping: the shaping mechanism 5 carries the blank to the shaping station, makes the blank contact the shaping lower die 64, and the blowing pipe 54 generates pressure to place the blank completely on the shaping lower die 64, then the shaping upper die 51 returns to the shaping station, the shaping upper die 65 arrives at the shaping station and closes with the shaping lower die 64, and the blank is heated and dried by the upper heating wire and the lower heating wire to shape it, and the steam suction pipe 641 simultaneously absorbs the steam generated during the heating process; S4, unloading: the separation air pipe 63 connected to the shaping upper mold 65 sucks air, sucks up the shaped product and transfers it to the unloading station, and the product slides from the unloading plate 7 to the designated position for collection.

[0033] In this embodiment, the production of paper-plastic tableware is taken as an example, and the coating tank 22 is filled with a fireproof solution. The fireproof solution can also be mixed with a solution with waterproof, oil-proof, acid-resistant and alkali-resistant functions.

[0034] The working process is as follows: S1, the slide plate 4 is moved by the horizontal driving mechanism 8, and the shaping mechanism 5 reaches above the pulp tank 21.

[0035] At the shaping station, the shaping lifting mechanism 52 descends, so that the bottom of the shaping upper mold 51 is immersed in the pulp tank 21, and the suction pipe 53 sucks air to absorb the moisture in the pulp tank 21, and the fibers are covered on the shaping upper mold 51. Specifically, the suction pipe 53 is connected to the upper part of the shaping upper mold 51, so that the fibers are covered on the lower surface of the shaping upper mold 51. The suction time and amount of the suction pipe 53 can be controlled according to the required thickness of the pulp model. After reaching the required amount, the shaping lifting mechanism 52 makes the shaping upper mold 51 rise. When the suction pipe 53 is working, the pulp liquid conveying pipe continuously replenishes the pulp liquid into the pulp tank 21. S2, the slide plate 4 moves so that the shaping upper mold 51 reaches above the coating tank 22.

[0036] At the coating station, the shaping lifting mechanism 52 descends, so that the blank on the shaping upper mold 51 enters the coating solution in the coating tank 22, and the suction pipe 53 sucks air to make the coating solution enter the blank. The suction speed of the suction pipe 53 is controlled so that the coating solution is absorbed by the blank in a specified amount. After completion, the shaping lifting mechanism 52 rises; S3, the slide plate 4 moves so that the shaping upper mold 51 reaches above the shaping lower mold 64, the shaping lifting mechanism 52 descends to place the blank on the shaping lower mold 64, the shaping upper mold 51 moves away, the shaping upper mold 65 reaches the position of the shaping lower mold 64 to close the mold and press the pulp model, the lower heating wire heats, and the steam suction pipe 641 sucks air at the same time, the lower heating wire heats the pulp model, and the water inside it is quickly evaporated, and the steam suction pipe 641 quickly sucks away the water, so as to achieve the purpose of quickly shaping the entire pulp model. After shaping is completed, the steam suction pipe 641 stops; S4, the separation air pipe 63 of the shaping upper mold 65 sucks air, and the shaping lifting mechanism 62 makes the shaping upper mold 65 rise, and at the same time, it rises with the shaped product and moves to the unloading station. The separation air pipe 63 stops sucking air, and the shaped product falls on the unloading plate 7.

[0037] In this embodiment, the time of adsorption drop and adsorption can be adjusted according to actual conditions, such as conducting experiments according to the thickness of the product to be formed, the concentration of the solution and other conditions.

[0038] In the present invention, the process of shaping - applying functional coating - high-temperature heating to fix the shape - producing the finished product can be completed at one time, without the need for secondary coating operation required by the prior art. At the same time, it can ensure that the product has functional coating inside, especially fireproof performance, and its fireproof performance is better than that of the surface coating.

[0039] 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 pulp molding device, characterized in that: The machine comprises a frame, on which a pulp tank and a forming mechanism are arranged, wherein the forming mechanism comprises a horizontal linear guide rail, a slide plate, a horizontal driving mechanism, a shaping mechanism and a shaping mechanism, wherein one end of the horizontal linear guide rail extends to the top of the pulp tank to form a shaping station, and the other end extends to the outside of the pulp tank to form a shaping station and a feeding station, the shaping mechanism and the shaping mechanism are installed on the slide plate, and the horizontal driving mechanism connects the horizontal linear guide rail and the slide plate; The shaping mechanism comprises a shaping upper die and a shaping lifting mechanism, the shaping upper die is located below the shaping lifting mechanism, and the shaping upper die is connected with an air suction pipe and an air blowing pipe; The shaping mechanism comprises a shaping upper die, a shaping lower die and a shaping lifting mechanism, wherein the shaping upper die is located below the shaping lifting mechanism, the shaping lower die is located at a corresponding shaping station on the frame, and a separation air pipe is connected to the shaping upper die; The lower shaping mold is connected with a steam straw, and a lower heating wire is arranged on the lower shaping mold; A coating tank is arranged on the frame corresponding to the pulp tank, and the coating tank is used to contain the coating solution. A coating station is arranged above the linear guide rail corresponding to the coating tank.

2. The pulp molding device according to claim 1, characterized in that: The coating station is located between the shaping station and the shaping station.

3. The pulp molding device according to claim 2, characterized in that: A cleaning pipe is arranged in the pulp tank, and a plurality of cleaning nozzles are arranged on the cleaning pipe.

4. The pulp molding device according to claim 3, characterized in that: The pulp tank is provided with a slide rail, the cleaning pipe is slidably connected to the slide rail, and the cleaning pipe is connected to a cleaning driving mechanism.

5. The pulp molding device according to claim 4, characterized in that: An inclined blanking plate is arranged at the blanking station, one end of the blanking plate is hinged to the frame, an adjustment hole is arranged on the side of the blanking plate, and an adjustment rod is arranged between the adjustment hole of the blanking plate and the frame.

6. A pulp molding method, characterized in that: The steps include: S1. Shaping: The shaping mechanism moves to the shaping station to allow the shaping upper die to enter the pulp tank, and negative pressure is generated through the suction pipe, so that the pulp passes through the shaping upper die, and the fibers are intercepted and attached to the shaping upper die to be shaped into a blank; S2. Coating penetration: The shaping mechanism carries the blank to the coating area and allows the blank to enter the coating tank. Negative pressure is generated through the suction pipe, allowing the coating solution to enter the surface and interior of the blank. S3, shaping: The shaping mechanism carries the blank to the shaping station, makes the blank contact the shaping lower die, and the pressure is generated by the blowing pipe to place the blank completely on the shaping lower die. Then the shaping upper die returns to the shaping station, and the shaping upper die arrives at the shaping station and is molded with the shaping lower die. The blank is heated and dried to shape it through the action of the upper heating wire and the lower heating wire. The steam suction pipe also absorbs the steam generated during the heating process. S4, unloading: The separation air pipe connected to the shaping upper mold sucks air, sucks up the shaped product and transfers it to the unloading station, and the product slides from the unloading plate to the designated position for collection.

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