EP3702530B1

EP3702530B1 - Molding process and equipment

Info

Publication number: EP3702530B1
Application number: EP17870641.2A
Authority: EP
Inventors: Fabin YI; Yuyang ZOU
Original assignee: Shenzhen Wopuzhixuan Technology Co Ltd
Current assignee: Shenzhen Bromake New Material Co Ltd
Priority date: 2017-10-24
Filing date: 2017-11-24
Publication date: 2023-05-03
Anticipated expiration: 2037-11-24
Also published as: CN207468990U; JP6668471B2; WO2019080242A1; EP3702530A4; CN107881856A; ES2949423T3; US20200332473A1; JP2019536914A; EP3702530A1

Description

BACKGROUND

1. Technical Field

The present disclosure generally relates to a plant molded product molding process and a device for a plant molded product using same.

2. Description of Related Art

The conventional paper-making and paper pulp molding technology is using cellulose and hemi-cellulose diluted slurry as raw materials, but not directly using plant raw material for molding. It is necessary to chemically treat the raw material in order to obtain high purity fiber during the process, thereby the raw material utilization rate is low. In addition, it is also necessary to add chemical additives to seriflux in order to form a paper molded product with a certain strength, configuration and function. In order to obtain the seriflux with only cellulose and hemi-cellulose, it is necessary to add acid or alkali to plant mixture seriflux of crushed plants to remove other substances in the plant raw material. For some packaging paper products, the cost of the aforementioned production process is too high, the waste of resources is serious, and the environmental pollution by the manufacturing process is large. Therefore, it is needed to improve the conventional technology of pulp molded products. A first related document EP 1235462 A1 discloses a loudspeaker system, a method and an apparatus of manufacturing the same. The loudspeaker system includes a vibrating plate producing sound due to change in air pressure based on vibration; and a paper-skimmed and formed paper frame member supporting the vibrating plate in a rear direction of the vibrating plate and having a hole releasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. The method of manufacturing the loudspeaker system, comprising the steps of: a first step of bringing auxiliary mold into contact with a part of a forming surface in a frame-forming mold for paper-skimming and forming a frame member of a loudspeaker system; a second step of adhesion of liquefied paper material having a water content to a section other than a section making contact with the auxiliary mold in the forming surface of the frame-forming mold; a third step of removing water from the liquefied paper material adhered to the forming surface of the frame-forming mold; and a fourth step of heating and drying the water-removed paper material to form a paper frame member. A second related document US 6086720 discloses an efficient, low cost method and an apparatus for controlling fiber deposition in a fiber reinforced perform. In the method, a main screen is placed in a tank filled with liquid, the main screen has a major surface, upright side walls and a plurality of openings formed therein; reinforcing fibers are added to the liquid to create a slurry, the main screen is raised through the slurry to a level beneath the top of the slurry, thereby causing the reinforcing fibers to be deposited on the main screen. A retainer screen is inserted into the slurry so that the reinforcing fibers are sandwiched between the main screen and the retainer screen. Both the main screen and retainer screen are raised out of the tank effectively forming a preform with minimal deformation. An alternative embodiment includes a bubbler zone control device for mixing the slurry. The tank is divided into separate areas or zones whereby the supply of fluid to each bubbler zone is controlled. The bubbler zone controller may be used to initiate or diminish a vortex in the slurry as the screen is being raised out of the tank. Another embodiment includes a fiber dispenser controller for sequentially adding different fibers to the slurry. A third related document WO 2017/165986 A1 discloses an automatic molding machine for a molded product, a manufacturing method, and a finished product. Mainly provided are an automatic molding machine for enabling upper and lower pulp suction molds (10, 20) to simultaneously suck pulp in a pulp box (30), closing the molds and forming a molded blank, and then performing dewatering and thermal compression shaping to form a molded product, a manufacturing method, and a finished product. The automatic molding machine for a molded product, the manufacturing method, and the finished product can improve the manufacturing speed, increase the thickness of a finished product and a shock absorbing effect, and enable surfaces to be excellent surfaces. A fourth document WO 2017/149408 A1 discloses an energy efficient method to manufacture 3D shaped articles, with smooth crease-free surfaces, from cellulose-based material. The method comprises the steps of: - providing a suspension with a dry content of more than 10%, which suspension comprises at least 95w% of cellulose fibers calculated on the total amount of dry material, whereof at least 50w% of said cellulose fibers have a fiber length of less than 1 mm, - spraying said suspension on a 3D-shaped, heated mold having a smooth surface, in at least a first step, whereby a 3D shaped article of cellulose fiber based material is formed, - drying said 3D shaped article.

SUMMARY

The technical problems to be solved: in view of the shortcomings of the related art, the present disclosure relates to a plant molded product molding process and a device using same which can achieve high utilization of raw materials, waste reduction, energy saving and environmental protection.
The technical solution adopted for solving the technical problems of the present disclosure is: a molding process for a plant molded product includes the following contents:
producing paper pulp based on plants as raw material; obtaining high consistency paper pulp by adding water into the raw material of the paper pulp and crushing a mixture thereof, and obtaining paper seriflux via the high consistency paper pulp being diluted with water; obtaining high consistency plant seriflux by adding water into plant raw materials and then crushing and wall-breaking a mixture thereof, and obtaining plant seriflux via the high consistency plant seriflux being diluted with water; dehydrating the paper seriflux to form a paper pulp enveloping layer of a molded product; dehydrating the plant seriflux to form a plant pulp layer of the molded product; fitting the paper pulp enveloping layer with the plant pulp layer, fitting the paper pulp enveloping layer with the plant pulp layer, performing state-of-change on the non-cellulosic material of the plant pulp layer and then migrating the plant pulp layer after being performed state-of-change toward the pulp enveloping layer by changing the temperature and the pressure of the molded product, so as to combine and mold the plant pulp layer with the paper pulp enveloping layer.
Wherein a range of the temperature is between 30 degree below zero and 280 degree, and a range of the pressure is between 1 MPa and 11 MPa.
Wherein concentration of the paper seriflux is between 0.5% and 1.5%, and concentration of the plant seriflux is between 0.8% and 1.5%.
Wherein the plant raw material includes herbs, crop stalks and roots, stems, leaves, and shells of shrubs, and the pulp raw material includes pulp boards and recycled papers.
In another aspect, a plant molding device according to an exemplary embodiment of the present disclosure includes a first storage tank configured for containing paper seriflux; a second storage tank configured for containing plant seriflux; a slurry pool including an outlet formed thereof and an inlet portion connected to the first and second storage tanks; a mold unit connected to the outlet. According to the process sequence, the mold unit sequentially includes a water mold, a forming mold and a drying mold with a heating device thereof. The water mold, the forming mold and the drying mold each include a first mold core and a second mold core matched with the first mold core. Each first mold core is mounted with an elevating driver for driving the first mold core to be opened and closed with the corresponding second mold core, and each of the first mold core and the second mold core is respectively connected with a vacuum gas circuit for adsorbing a plant molded product. A strainer is formed at a junction between each of the first mold core and the second mold core and its corresponding vacuum gas circuit for water permeation. A guiding device is positioned between every two adjacent the water mold, the forming mold and the drying mold; and wherein the first mold core or the second mold core of each mold of the water mold, the forming mold and the drying mold can move along the guiding device so that at least one set of the first and second mold cores respectively belonging to every two adjacent the water mold, the forming mold and the drying mold can achieve mold opening and mold closing. The first storage tank is connected with a first water cleaning tank and a high consistency paper pulp tank; the second storage tank is connected with a second water cleaning tank and a high consistency plant pulp tank; the high consistency paper pulp tank connected to a first hydraulic pulper and the high consistency plant pulp tank connected to a second hydraulic pulping and kneading device; a corresponding pump valve member provided between the first and second storage tanks and the slurry pool, between the first water cleaning tank, the high consistency paper pulp tank and the first storage tank, and between the second water cleaning tank, the high consistency plant pulp tank and the second storage tank. Pulp board or waste paper is broken in hydraulic pulper to obtain the high consistency paper pulp, and then the high consistency paper pulp is transferred to the high consistency paper pulp tank; plant raw material is first shredded in the hydraulic pulper and then kneaded by a kneading device until fiber of the plant is exposed outside to obtain high consistency plant seriflux transferred to the high consistency plant pulp tank, so that the high consistency paper pulp and water is pumped to the first storage tank by the pump valve member to obtain the paper seriflux, and the high consistency plant seriflux and water is also pumped to the second storage tank by the pump valve member to obtain the plant seriflux.
Wherein the guiding device includes an upper guide rail extending along a direction towards the forming mold from the water mold and a lower guide rail, the first mold core of the water mold movably installed in the upper guide rail, the second mold core of both the forming mold and the drying mold movably installed in the lower guide rail. One end of the lower guide rail is corresponding to the upper guide rail and the other end of the lower guide rail is extended out through the forming mold and the drying mold.
Wherein each bottom surface of the first and second mold cores is connected with a compression gas circuit for releasing pressure of the plant molded product, the first mold core of the water mold and each second mold core of the forming mold and the drying mold can be driven to respectively move along the guiding device by a corresponding horizontal cylinder.
The present disclosure provides the advantages as below.
The present disclosure can use different components of the plant to help shape and improve strength, and to achieve high utilization of raw materials, waste reduction, energy saving and environmental protection.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of the plant molding device in accordance with an exemplary embodiment.
FIG. 2 is a front schematic view of the plant molding device of FIG. 1.

In the figures, the element labels according to the embodiment of the present disclosure shown as below:
first storage tank 1, second storage tank 2, water mold 3, forming mold 4, drying mold 5, first mold core 6, second mold core 7, elevating driver 8, horizontal cylinder 9, upper guide rail 10, lower guide rail 11, high consistency paper pulp tank 12, first water cleaning tank 13, high consistency plant pulp tank 14, second water cleaning tank 15, first hydraulic pulper 16, second hydraulic pulping and kneading device 17, slurry pool 18, vacuum gas circuit 19, compression gas circuit 20, pump valve member 21, mold module 100, inlet portion 101, guiding device 102, strainer 103.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings, in which like reference numerals indicate similar elements.
A plant molding process for a plant molded product includes the following contents: producing paper pulp based on plants as raw material (usually pulp boards or recycled papers); and obtaining high consistency paper pulp by adding water into the raw material of the paper pulp and crushing a mixture thereof, and obtaining paper seriflux via the high consistency paper pulp being diluted with water; obtaining high consistency plant seriflux by adding water into plant raw materials and then crushing and wall-breaking (kneaders can be used) a mixture thereof, and obtaining plant seriflux via the high consistency plant seriflux being diluted with water. Concentration of the paper seriflux is preferably between 0.5% and 1.5%, and concentration of the plant seriflux is preferably between 0.8% and 1.5%. The purpose of diluting the high consistency slurry is to facilitate the delivery of the seriflux in a pipeline to avoid clogging. At the same time, the diluted seriflux has a certain flow rate after casting into a mold, which can be evenly filled with a mold core. The plant molding process further includes the following contents: forming a pulp enveloping layer of a molded product by dewatering the paper seriflux; forming a plant pulp layer of the molded product by dewatering the plant seriflux; laminating the pulp enveloping layer and the plant pulp layer and processing non-cellulosic material of the plant pulp layer to make it migrate towards the pulp enveloping layer for combining them together.
The plant raw material includes: surplus materials after harvesting of agricultural crops such as rice straws, wheat stalks, cotton stalks and corn stalks, forestry side materials such as shrubs and wild grasses and surplus materials after wood processing, such as saw-milling edge materials. The above raw materials are physically shredded and the shredding shape is not specifically required. But at least one dimension should be smaller than the thickness of the final product to meet the usage conditions. That is to say, the more a wall along the shredding plant original tissue interface is opened, the physical crushing of the plant materials is better. The plant material is added water to form the plant seriflux.
The enveloping layer of the molded product is formed by the paper seriflux, and the pulp raw material can be pulp boards or recycled papers. The pulp enveloping process can adjust a color and a smoothness of the pulp, make the molded product better and meet different requirements of the manufacturers. The enveloping layer should control its density and thickness, and its density and thickness can be changed by the paper seriflux concentration (between 0.15 and 1.5 %), the vacuum (between minus 0.05 MPa and minus 0.07 MPa) and the forming time (between 1 ms and 1 min).
According to the requirement, the cooperation of the plant seriflux layer and a fabric layer can be controlled. An example of the molded product with a three-layer configuration is taken: firstly, the paper seriflux is casted in a mold to form an inner layer of the plant molded product, and then the plant seriflux is casted onto the inner layer to form an interlayer of the plant molded product. Finally, the plant seriflux is casted onto the interlayer to form an outer layer of the plant molded product. In this way, the plant molded product with a three-layer configuration is obtained. During casting the structure of each layer, the moisture of the seriflux should be removed in order to gradually form the layer. In this process, the moisture removed from each layer can be returned to the corresponding high consistency slurry for recycling again. At last, the plant molded product is heated and dried to obtain a final plant molded product. Generally, the molded product with pressure dehydration is transferred to a corresponding mold. So, a final product can be finalized, according to the product requirements, the selection of materials, the temperature range in 30 degree below zero and 280 degree, the real-time temperature environment, a continuous pressure range between 1 MPa and 11 MPa and a time range from 30 s to 30 min.
The conventional paper-making pulping technology requires the separation of cellulose from other substances as much as possible to retain cellulose and hemi-cellulose. The fluid with a certain concentration is formed to suit the process requirements of a paper sheet, with the material utilization at about 30%. The present disclosure uses crop straws and other plant materials as the plant raw materials, and the purpose is to crush the plant rather than separate fibers. And then all the fiber materials within the plant itself, such as pectin, fat, resin, are used to take phase transition and migration so that the fiber lap is realized. The strength of the plant molded product is increased by using material such as lignin and ash in the plant, and partial material surface migration is realized in the heating mold to meet the strength demand of the plant molded product. The present disclosure can utilize different components in the plant to achieve the plant molded product and enhancing the strength, and obtain 99.9% utilization rate of the raw material. The state-of-change is referred that a state of the material is changed to another state, such as from solid-phase to the liquid-phase.
The conventional pulp molding process usually takes a pulp sucking, one time or more times molding methods in order to make the plant molded product look more neat and beautiful. The present disclosure process is provided for pulp sucking more than once and molding more than once. The plant molded product can be divided into three layers with an inner layer, a middle layer and an outer layer so that it is to impart various kinds of sensory perception to the product. In this way, this kind of plant molding process can not only ensure the strength of the plant molded product and meet various different demands, but also can guarantee the plant molded product configuration via molding for many times namely to numerous reshaping and functionality. At the same time, in order to realize the need of multiple molding, the requirement of the temperature, the vacuum degree and the parameters are higher than that of the conventional pulp molding process. A range of the vacuum degree is controlled within 0.05 MPa to 0.07 MPa, a temperature range in the mold is between 30 degree below zero and 280 degree, and an internal pressure of the mold is controlled by the hydraulics stepless regulation way.
In the present embodiment of the disclosure, the multi-layer structure can change biochemical characteristics and adjust the life cycle of the plant molded product by controlling thickness and density of each of the inner layer, the interlayer and the outer layer, as well as the interlayer between each two adjacent the inner layer and the outer layer. The principle is that the temperature and the pressure is applied between the pulp enveloping layer and the plant pulp layer, thereby the non-cellulosic material of the plant pulp layer (such as pectin, resin, starch and other organic matter and inorganic metal molecules)can migrate from the plant pulp layer to an adjacent interface between the two parts. An organic matter is tightly wrapped in the structure by a fine structure of the pulp enveloping layer to be solidified and molded so that the organic matter is non-contacted with oxygen, thereby the oxidation reduction speed of the organic matter is reduced. In addition, a fine degree of the plant molded product can be adjusted by controlling the molding pressure of the mold. That is to say, the more the pressure is, the more dense the plant molded product is, thereby the path which gas molecules passing in a denser product is more narrow and tortuous. Thus, the transmittance of oxygen is also decreased. Therefore, it is possible to control the rate of oxidation and adjust the life cycle of the product by changing the fine density of the product to change the transmittance of oxygen. In the present disclosure, the reason for retaining the organic matter is that the organic matter can accelerate the degradation rate of the product during the degradation process. The whole product is a kind of pure plant raw material, with its waste product being composted, so it can directly carry on natural degradation and enter the natural circulation law.
Referring to FIG. 1 and FIG. 2, a corresponding plant molding device is provided in order to achieve the above mentioned plant molding process.
The plant molding device includes a first storage tank 1, a second storage tank 2, a slurry pool 8 and a mold unit 100. The first storage tank 1 is configured for containing the paper seriflux, and the second storage tank 2 is configured for containing the plant seriflux. The slurry pool 8 includes an inlet portion 101 connected to the first and second storage tanks 1, 2 and an outlet connected to the mold unit 100.
Preferably, the first storage tank 1 is connected with a first water cleaning tank 13 and a high consistency paper pulp tank 12, and the second storage tank 2 is connected with a second water cleaning tank 15 and a high consistency plant pulp tank 14. The high consistency paper pulp tank 12 is connected to a first hydraulic pulper 16 and the high consistency plant pulp tank 14 is connected to a second hydraulic pulping and kneading device 17. A corresponding pump valve member 21 is provided between the first and second storage tanks 1, 2 and the slurry pool 18, between the first water cleaning tank 13, the high consistency paper pulp tank 12 and the first storage tank 1, and between the second water cleaning tank 15, the high consistency plant pulp tank 14 and the second storage tank 2. The delivery of the seriflux is achieved by the pump valve member 21.
According to the process sequence, the mold unit 100 sequentially includes a water mold 3, a forming mold 4 and a drying mold 5 with a heating device thereof. The water mold 3, the forming mold 4 and the drying mold 5 each include a first mold core 6 and a second mold core 7 matched to the first mold core 6. Generally, the first mold core 6 is positioned on top of a mold, while the second mold core 7 is positioned on bottom of the mold. Each first mold core 6 is mounted with an elevating driver 8 (the elevating driver 8 can be driven to lifting up and down by a cylinder) for driving the first mold core 6 to be opened and closed with the corresponding second mold core 7. Each of the first second mold cores 6, 7 is respectively connected with a vacuum gas circuit 19 for adsorbing the plant molded product. A strainer 103 is formed at the junction between each of the first and second mold cores 6, 7 and its corresponding vacuum gas circuit 19 for water permeation. The strainer 103 may be a plurality of apertures evenly distributed across each of the first and second mold cores 6, 7only for the gas and the water passing through the plurality of apertures. When the vacuum gas circuit 19 can not only absorb the plant molded product through the plurality of apertures, but also be as a function of water removal. In this way, the seriflux is gradually solid so that the plant molded product is formed in the first and second mold cores 6, 7. The vacuum degree of the vacuum gas circuit 19 is controlled between 0.05MPa and 0.08MPa.
A guiding device 102 is positioned between every two adjacent the water mold 3, the forming mold 4 and the drying mold 5. The first mold core 6 or the second mold core 7 of each of the water mold 3, the forming mold 4 and the drying mold 5 can move along the guiding device 102 so that at least one set of first and second mold cores 6, 7 respectively belonging to every two adjacent the water mold 3, the forming mold 4 and the drying mold 5 can achieve mold opening and mold closing. The plant molded product can be transmitted between the water mold 3, the forming mold 4 and the drying mold 5 via the movement of each of the first mold core 6 and the second mold core 7 and the opening and closing between the water mold 3, the forming mold 4 and the drying mold 5 to complete the corresponding process in each mold without requiring excessive manual intervention.
Furthermore, the water mold 3 is corresponding to the position of the outlet of the slurry pool 8 and the seriflux in the slurry pool 18 is pumped through its vacuum gas circuit 19. The mold is in correspondence with the outlet of the slurry pool 18 to implement the use of the liquid in the slurry pool 18, which has been achieved in several ways in the conventional plant molding process. The typical method is that the mold is directly connected to the outlet of the slurry pool 18 or the mold is moved into the outlet of the slurry pool 18 and then draws the liquid from the slurry pool 18 to a corresponding mold core. In the present disclosure, the second mold core 7 of the water mold 3 is corresponding to the location of the outlet of the slurry pool 18, thereby the second mold core 7 of the water mold 3 and the slurry pool 18 can be connected through the pipeline, and the second mode core 7 can be moved until the inlet of a casting liquid is connected with the outlet of the slurry pool 18, and then the seriflux can be sucked from the slurry pool 18 into the corresponding mold core by the vacuum gas circuit 19.
The guiding device 102 includes an upper guide rail 10 extending along a direction towards the forming mold 4 from the water mold 3 and a lower guide rail 11. The first mold core 6 of the water mold 3 is movably installed in the upper guide rail 10, and the second mold core 7 of both the forming mold 4 and the drying mold 5 is movably installed in the lower guide rail 11. One end of the lower guide rail 11 is corresponding to the upper guide rail 10 and the other end of the lower guide rail 11 extends out through the forming mold 4 and the drying mold 5. Each the first mold core 6 or the second mold core 7 of the water mold 3, the forming mold 4 and the drying mold 5 is driven by a horizontal cylinder 9 to move along their corresponding guide rail.
Preferably, each bottom surface of the first and second mold cores 6, 7 is connected with a compression gas circuit 20 for releasing the pressure of the plant molded product in order to facilitate transmission of the plant molded product.
The preferred implementation process of the present disclosure is shown as follows:
The pulp board or the waste paper is broken in hydraulic pulper to obtain the high consistency paper pulp, and then the high consistency paper pulp is transferred to the high consistency paper pulp tank 12. The plant raw material is first shredded in the hydraulic pulper and then kneaded by a kneading device until the fiber of the plant is exposed outside to obtain the high consistency plant seriflux, and the high consistency plant seriflux is transferred to the high consistency plant pulp tank 14. In this way, the high consistency paper pulp and water is pumped to the first storage tank 1 by the pump valve member 21, thereby the paper seriflux is obtained. At the same time, the high consistency plant seriflux and water is also pumped to the second storage tank 2 by the pump valve member 21 to obtain the plant seriflux.
Furthermore, the pump valve member 21 is first started to transfer the paper seriflux through the pipeline to the slurry pool 18, and then the vacuum gas circuit 19 of the second mold core 7 of the water mold 3 is opened to draw the paper seriflux from the slurry pool 18 to the second mold core 7 of the water mold 3. At the same time, the moisture therein is discharged from the vacuum gas circuit 19 via the strainer 103 so that the inner layer of the plant molded product is formed. The slurry pool 18 is cleaned and the plant seriflux is transferred to the slurry pool 18, and then the vacuum gas circuit 19 connected with the second mold core 7 of the water mold 3 is opened to draw the plant seriflux from the slurry pool 18 to the second mold core 7 of the water mold 3, moisture therein is thirdly discharged from the vacuum gas circuit 19 via the strainer 103 so that the interlayer of the plant molded product is formed. Finally, the slurry pool 18 is cleaned again and the plant seriflux is sucked by the vacuum gas circuit 19 to cast onto the interlayer and remove the moisture via the strainer so that the outer layer of the plant molded product is formed. In this way, the plant molded product with a three-layer structure is obtained.
The first mold core 6 of the water mold 3 is driven downward by the elevating driver 8 to match with its second mold core 7 for forming the plant molded product. After reaching a certain compression time, the vacuum gas circuit 19 of the second mold core 7 is closed and its compressed gas circuit 20 is then opened, and the vacuum gas circuit 19 of the first mold core 6 is opened to absorb the plant molded product. At this time, the elevating driver 8 is lifted again so that the plant molded product adsorbed on the first mold core 6 of the water mold 3 is following to lift.
The first mold core 6 of the water mold 3 is moving along the upper guide rail 10 towards the forming mold 4 under action of the horizontal cylinder 9, and the second mold core 7 of the forming mold 4 is also moving along the lower guide rail 11 towards the water mold 3 until the two parts corresponds up and down. The first mold core 6 of the water mold 3 is moved downward under action of the horizontal cylinder 9 to match with the second mold core 7 of the forming mold 4, the vacuum gas circuit 19 belonging to the first mold core 6 of the water mold 3 is closed and its compression gas circuit 20 is opened to release the plant molded product, while the vacuum gas circuit 19 belonging to the second mold core 7 of forming mold 4 is opened to absorb the plant molded product. In this condition, the first mold core 6 of the water mold 3 and the second mold core 7 of the forming mold 4 are opened to reset along their corresponding guide rails.
The first mold core 6 of the forming mold 4 is moving downward to match with its second mold core 7 and further compress and remove moisture from the plant molded product until the first mold cores 6 and the second mold core 7 of the forming mold 4 are opened after a certain time. At the same time, the plant molded product is adsorbed on the first mold core 6 of the forming mold 4 by means of the corresponding operation of both the vacuum gas circuit 19 and the compression gas circuit 20 to follow moving upward.
After the mold opening, the second mold core 7 of the forming mold 4 is moving towards the water mold 3 to receive a next plant molded product, the second mold core 7 of the drying mold 5 is moved along the lower guide rail 11 to below the forming mold 4. At this time, the first mold core 6 of the forming mold 4 is moved downward to match with the second mold core 7 of the drying mold 5, and the next plant molded product is transferred to the second mold core 7 of the drying mold 5 by means of the corresponding operation of both the vacuum gas circuit 19 and the compression gas circuit 20.
The second mold core 7 of the drying mold 5 moves back to its reset position along the lower guide rail 11 and its first mold core 6 moves downward to close with the corresponding second mold core 7, the heating device is then opened to dry the plant molded product, thereby a final plant molded product is obtained.
In the present disclosure, the necessary mold of the water mold 3, the forming mold 4, and the drying mold 5 used in the plant molding process of the product is designed to be an active installation and engaged with a corresponding guide rail to realize the delivery and docking of the final product by the water mold 3, the forming mold 4, and the drying mold 5. In this way, the structure can reduce manual intervention and improve high production efficiency and product yield.
Although the features and elements of the present disclosure are described as embodiments in particular combinations, each feature or element can be used alone or in other various combinations within the principles of the present disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.

Claims

A plant molded product molding process comprising the following steps:
producing paper pulp based on plants as raw material;

obtaining high consistency paper pulp by adding water into the raw material of the paper pulp and crushing a mixture thereof, and obtaining paper seriflux via the high consistency paper pulp being diluted with water;

obtaining high consistency plant seriflux by adding water into plant raw materials and then crushing and wall-breaking a mixture thereof, and obtaining plant seriflux via the high consistency plant seriflux being diluted with water;

dehydrating the paper seriflux to form a paper pulp enveloping layer of a molded product;

dehydrating the plant seriflux to form a plant pulp layer of the molded product;

fitting the paper pulp enveloping layer with the plant pulp layer, performing state-of-change on the non-cellulosic material of the plant pulp layer and then migrating the plant pulp layer after being performed state-of-change toward the pulp enveloping layer by changing the temperature and the pressure of the molded product, so as to combine and mold the plant pulp layer with the paper pulp enveloping layer.
The plant molded product molding process as claimed in claim 1, wherein a range of the temperature is between 30 degree below zero and 280 degree, and a range of the pressure is between 1 MPa and 11 MPa.
The plant molded product molding process as claimed in claim 2, wherein concentration of the paper seriflux is between 0.5% and 1.5%, and concentration of the plant seriflux is between 0.8% and 1.5%.
The plant molded product molding process as claimed in claim 3, wherein the plant raw material includes herbs, crop stalks and roots, stems, leaves, and shells of shrubs, and a pulp raw material includes pulp boards and recycled papers.
A plant molding device comprising:
a first storage tank (1) configured for containing paper seriflux;

a second storage tank (2) configured for containing plant seriflux;

a slurry pool (18) comprising an outlet formed thereof and an inlet portion (101) connected to the first and second storage tanks (1, 2);

a mold unit (100) connected to the outlet, according to the process sequence, the mold unit (101) sequentially comprising a water mold (3), a forming mold (4) and a drying mold (5) with a heating device thereof;

the water mold (3), the forming mold (4) and the drying mold (5) each comprising a first mold core (6) and a second mold core (7) matched with the first mold core (6), each first mold core (6) mounted with an elevating driver (8) for driving the first mold core (6) to be opened and closed with the corresponding second mold core (7), each of the first mold cores (6) and the second mold cores (7) respectively connected with a vacuum gas circuit (19) for adsorbing a plant molded product;

a strainer (103) formed at the junction between each of the first mold core (6) and the second mold core (7) and its corresponding vacuum gas circuit (19) for water permeation;

a guiding device (102) positioned between every two adjacent the water mold (3), the forming mold (4) and the drying mold (5); and wherein

the first mold core (6) or the second mold core (7) of each of the water mold (3), the forming mold (4) and the drying mold (5) can move along the guiding device (102) so that at least one set of the first and second mold cores (6, 7) respectively belonging to every two adjacent the water mold (3), the forming mold (4) and the drying mold (5) can achieve mold opening and mold closing; and wherein

the first storage tank (1) is connected with a first water cleaning tank (13) and a high consistency paper pulp tank (12); the second storage tank (2) is connected with a second water cleaning tank (15) and a high consistency plant pulp tank (14); the high consistency paper pulp tank (12) connected to a first hydraulic pulper (16) and the high consistency plant pulp tank (14) connected to a second hydraulic pulping and kneading device (17); a corresponding pump valve member (21) provided between the first and second storage tanks (1, 2) and the slurry pool (18), between the first water cleaning tank (13), the high consistency paper pulp tank (12) and the first storage tank (1), and between the second water cleaning tank (15), the high consistency plant pulp tank (14) and the second storage tank (12); and wherein

pulp board or waste paper is broken in hydraulic pulper to obtain the high consistency paper pulp, and then the high consistency paper pulp is transferred to the high consistency paper pulp tank (12); plant raw material is first shredded in the hydraulic pulper and then kneaded by a kneading device until fiber of the plant is exposed outside to obtain high consistency plant seriflux transferred to the high consistency plant pulp tank (14), so that the high consistency paper pulp and water is pumped to the first storage tank (1) by the pump valve member (21) to obtain the paper seriflux, and the high consistency plant seriflux and water is also pumped to the second storage tank (2) by the pump valve member (21) to obtain the plant seriflux.
The plant molding device as claimed in claim 5, wherein the guiding device (102) comprises an upper guide rail (10) extending along a direction towards the forming mold (4) from the water mold (3) and a lower guide rail (11), the first mold core (6) of the water mold (3) movably installed in the upper guide rail (10), the second mold core (7) of both the forming mold (4) and the drying mold (5) movably installed in the lower guide rail (11), and one end of the lower guide rail (11) corresponding to the upper guide rail (10) and the other end of the lower guide rail (11) extending out through the forming mold (4) and the drying mold (5).
The plant molding device as claimed in claim 6, wherein each bottom surface of the first and second mold cores (6, 7) is connected with a compression gas circuit (20) for releasing pressure of the plant molded product, the first mold core (6) of the water mold (3) and each second mold core (7) of the forming mold (4) and the drying mold (5) can be driven to respectively move along the guiding device (102) by a corresponding horizontal cylinder (9).