WO2019080242A1

WO2019080242A1 - Plant molding process and equipment

Info

Publication number: WO2019080242A1
Application number: PCT/CN2017/112960
Authority: WO
Inventors: 易发斌; 邹育洋
Original assignee: 深圳沃普智选科技有限公司
Priority date: 2017-10-24
Filing date: 2017-11-24
Publication date: 2019-05-02
Also published as: EP3702530A1; EP3702530B1; JP6668471B2; CN207468990U; US20200332473A1; JP2019536914A; EP3702530A4; CN107881856A; ES2949423T3

Abstract

Provided are a plant molded product molding process and a plant molded product molding equipment. The plant molded product molding process comprises the steps: taking and dehydrating pulp liquor to form a paper pulp envelope of a molded product; taking and dehydrating plant liquor to form a plant pulp layer of the molded product; and fitting the paper pulp envelope with the plant pulp layer, and carrying out processing to migrate non-fibrous matters in the plant pulp layer to the paper pulp envelope so as to make the plant pulp layer and the paper pulp envelope are combined and molded. The plant molded product molding equipment comprises vessels (1, 2) for accommodating each pulp and a die group (3, 4, 5) connected with the vessels (1, 2) by transmission pipelines, and the die group (3, 4, 5) is used for realizing product transmission by virtue of a guide rail device (10, 11). According to the process, the molding assisting and strength improving effects are achieved by using different components in plants, the utilization rate of raw materials of the plants reaches 99%, and the process is energy-saving and environment-friendly; and the equipment is intelligent in operation, little in manual intervention, capable of reducing the cost and increasing the production efficiency and high in yield rate of products.

Description

Plant molding process and equipment

Technical field

The invention relates to a plant molding process and apparatus.

Background technique

The existing papermaking technology and pulp molding technology use a diluted slurry of cellulose and hemicellulose as raw materials, and the plant raw materials are not directly used for molding. In the process, in order to obtain high-purity fiber, it is necessary to chemically process the raw material, resulting in low utilization rate of raw materials; and in order to form a paper product having a certain strength, structure and function, it is necessary to add a chemical auxiliary agent to the slurry; In the slurry of cellulose and hemicellulose, it is necessary to add an acid or a base to the pulverized plant mixture to remove other substances in the plant material. For some packaging paper products, the above-mentioned manufacturing process is too expensive, the resource waste is serious, and the environmental pollution generated in the manufacturing process is large, so there is an improvement in the technology of the existing pulp molded products.

Summary of the invention

The technical problem to be solved by the present invention is to provide a plant molding molding process and an apparatus for realizing the same, which are high in utilization rate of raw materials and environmentally friendly.

The technical solution adopted by the present invention to solve the technical problem thereof is: a molding process of a plant molded product, and the process includes the following contents:

Dewatering the pulp slurry to form a pulp envelope layer of the molded article;

Dehydrating the plant slurry to form a pulp layer of the molded article;

The pulp envelope layer and the vegetable pulp layer are laminated, and the non-fibrous material in the plant pulp layer is transferred to the pulp envelope layer to form a combination of the two.

The vegetable molding product forming process as described above, the pulp raw material is added with water to obtain a paper thick slurry, and the paper thick slurry is diluted with water to obtain the paper pulp; the plant raw material is added with water to be broken and broken to obtain a plant thick pulp, and the plant is obtained. The thick slurry was diluted with water to obtain a plant slurry.

The plant molding article forming process as described above changes the non-fibrous substance in the plant pulp layer by changing the temperature and pressure of the molded article, and migrates to the pulp envelope layer.

The vegetable molded article molding process as described above, wherein the temperature ranges from zero to 30 ° C to 280 ° C; the pressure ranges from 1 to 11 MPa.

The vegetable molded article molding process as described above, wherein the concentration of the pulp slurry is from 0.5% to 1.5%, and the concentration of the vegetable slurry is from 0.8% to 1.5%.

The plant molding product forming process as described above, wherein the plant material comprises roots, stems, leaves, shells and crop straws of herbs, shrubs; and the pulp material comprises pulp boards, recycled paper.

A plant molding product molding apparatus, the apparatus comprising a pulp pool and a mold set, the pulp pool having a liquid take-up port for docking with the mold set, the mold set comprising a water mold, a molding die and a mounting in sequence according to a process sequence a drying mold of the heating device, the apparatus further comprising a first slurry tank and a second slurry tank

a first slurry tank for containing a pulp slurry;

a second slurry tank for containing a plant slurry;

a slurry tank having an inlet end connected to the first slurry tank and the second slurry tank;

The water mold, the molding die and the drying die each include a first core and a second core which are matched with each other, and each of the first cores is provided with a lifting drive member for driving the mold and the second core, and each of the mold cores A core and a second core are connected with a vacuum gas path for adsorbing the plant molded product, and a filter structure for allowing moisture to pass through the connection with the vacuum gas path; The first core or the second core in the mold can be moved along the rail device, so that at least one component belongs to the first core and the second core can be opened and closed.

A plant molding product molding apparatus as described above, wherein the rail device comprises an upper rail and a lower rail, the first core of the water mold is movably mounted on the upper rail, and the upper rail is formed by the water mold toward the molding die The direction of the lower rail corresponds to the upper rail, and the other end extends through the molding die and the drying die. The molding die and the second core of the drying die are movably mounted on the lower rail.

a plant molding product molding apparatus as described above, wherein a bottom surface of each of the first core and the second core is further connected with a compressed gas path for depressurizing the plant molded product; A second core of both a core, a forming die, and a dry die is driven by the cylinder along the rail assembly.

a plant molding product molding apparatus as described above, wherein the first slurry tank is connected to a first fresh water tank, a paper thick slurry tank, and the paper thick slurry tank is connected to a first hydraulic pulper; The second slurry tank is connected with a second clean water tank and a plant thick slurry tank, wherein the plant thick slurry tank is connected with the second hydraulic pulper and the rake machine; the first slurry tank and the second slurry tank are Between the pulp pools, a first fresh water tank, a paper thick slurry tank and a first slurry tank, a pump valve assembly is installed between the second fresh water tank, the plant thick slurry tank and the second slurry tank.

The technical solution of the present invention has at least the following beneficial effects: high utilization rate of raw materials, reduced waste, energy saving and environmental protection.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

Figure 1 is a schematic perspective view of the apparatus of the present invention;

2 is a front view of the device of the present invention;

The logo in the figure is as follows:

1, the first slurry tank; 2, the second slurry tank; 3, water mold; 4, forming mold; 5, drying mold; 6, the first core; 7, the second core; 8, lifting drive 9, horizontal cylinder; 10, upper rail; 11, lower rail; 12, paper thick tank; 13, first clear water tank; 14, plant thick slurry tank; 15, second clear water tank; 16, first hydraulic crush Pulping machine; 17, second hydraulic pulper and boring machine; 18, pulp pool; 19, vacuum gas path; 20, compressed gas path; 21, pump valve assembly.

Detailed ways

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

For the molding process of the plant molded product, the pulp raw material (generally pulp board or recycled paper) is added with water to be pulverized to form a paper thick slurry, and water is added to the paper thick slurry to obtain a pulp slurry, and the pulp slurry concentration is preferably 0.5%-1.5%. . The plant material is added with water to be disintegrated, and then subjected to a wall breaking treatment (a machine can be used) to obtain a plant thick slurry, which is diluted with water to obtain a plant slurry, and the plant slurry concentration is preferably 0.8% to 1.5%. The purpose of diluting the thick slurry is to facilitate the transportation of the slurry in the pipeline to avoid clogging. At the same time, the slurry obtained after dilution has a certain flow rate after being cast into the mold, and can evenly spread the core. The pulp slurry is dehydrated to form a pulp envelope layer of the molded product, and the plant pulp is dehydrated to form a plant pulp layer of the molded product; then the pulp envelope layer and the vegetable pulp layer are laminated, and the non-fibrous substance in the plant pulp layer is processed. The pulp envelope layer migrates to combine the two.

Plant raw materials include residual materials after harvesting of agricultural crops, such as straw, wheat straw, cotton stalks, corn stalks; forestry margins, such as shrubs, wild grasses; residual materials after wood processing, such as sawn timber. The above raw materials are physically pulverized, and the shape of the pulverized material is not explicitly required, but the size of at least one dimension is smaller than the thickness of the finished product to satisfy the use condition, and the more the wall of the original tissue of the plant along the pulverizing interface is opened, the better the plant material is added with water. For plant pulp.

The pulp slurry is formed by the envelope layer of the product. The raw material is pulp board and recycled paper. The pulp envelope can easily adjust the color and smoothness, and make the products more sophisticated and meet the different needs of manufacturers. The envelope layer must be controlled in density and thickness, and the density and thickness can be varied by the pulp concentration (0.15% to 1.5%), the degree of vacuum (negative 0.05 MPa to minus 0.07 MPa), and the molding time (1 ms to 1 min).

According to the need to control the mixing of the vegetable slurry layer and the fabric layer, a three-layer structure product is taken as an example: first, the pulp slurry is cast in a mold to form a bottom layer of the plant molded product, and then the plant slurry is cast on the bottom layer to form a molded product interlayer. And the paper pulp is cast on the interlayer of the molded product to form a surface layer of the molded product, thereby forming a three-layer structure of the plant molded product. When pouring each layer of the structure, the water in the slurry is removed and gradually formed, and the water removed from each layer can be returned to the corresponding thick slurry for recycling. Finally, the molded molded article is heated and dried to obtain a final product. Generally, the pressure-dehydrated molded product is transferred to the corresponding mold, and the temperature environment is provided in real time in the temperature range of minus 30 ° C to 280 ° C according to the product requirements and material selection, and the pressure is continuously applied to the product (1-11 trillion). Pa) 30s to 30min, you can complete the product stereotypes.

In the prior art, papermaking pulping needs to separate the cellulose in the plant from other substances as much as possible, thereby retaining cellulose and hemicellulose, forming a certain concentration of fluid to meet the process requirements of the papermaking sheet, and the raw material utilization rate is 30. %about. The material preparation of the technology uses plant materials such as crop straws, the purpose is to pulverize the plants instead of separating the fibers, and then use the plant itself to contain all the non-fibrous materials, if the colloid, fat, resin, etc. undergo phase transformation and migration to achieve fiber bonding The use of lignin, ash and other substances in the plant to enhance the strength of the product, and to achieve partial material surface migration in the heating mold to meet the product strength requirements. The technology utilizes different components in the plant to assist in shaping and strength enhancement, and the utilization rate of the raw materials reaches 99.9%. The phase transition refers to the transformation of a substance from one phase to another, such as a solid phase to a liquid phase.

The existing pulp molding generally adopts one-time suction, one or more molding methods, and the purpose of multiple molding is to make the product shape more neat and beautiful. The molding process of the technology adopts multiple suction and multiple molding methods. The product can be divided into three layers: inner, middle and outer. The purpose of stratification is to give the product a variety of senses. While ensuring the strength of the product, it also meets various needs, and multiple moldings are required for multiple shaping and functionality. Guarantee product structure. At the same time, in order to achieve the need for multiple molding, the temperature and vacuum control and parameters are higher than the requirements of pulp molding. The degree of vacuum should be controlled at 0.05MPa-0.07MPa, the temperature range of the mold is -30°C-280°C, and the pressure inside the mold is hydraulically steplessly regulated.

The multi-layer structure can change the life cycle of the product by controlling the thickness and density of the outer layer, the interlayer, the inner layer structure, and the interlayer between the layers to change the biochemical characteristics of the product. The principle is that temperature and pressure act between the pulp envelope layer and the plant pulp layer. Non-fibrous substances (such as rubber, resin, starch and other organic substances and inorganic metal molecules) in the plant pulp layer will be from the plant pulp layer. It migrates to the adjacent interface between the two, and the organic material is tightly wrapped in the structure to form a solid structure by the fine structure of the pulp envelope layer, and the organic substance is in contact with oxygen to reduce the redox reaction speed of the organic substance. In addition, by controlling the molding pressure of the mold, the fineness of the product can be adjusted, that is, the larger the pressure, the denser the product, and the denser the structure of the product makes the gas molecular transmission path narrow and tortuous, the oxygen permeability decreases, so it can pass By changing the fineness of the product to change the oxygen transmission rate, the oxidation reaction rate can be controlled to adjust the life cycle of the product. The reason for retaining organic substances is that organic substances can accelerate the degradation rate of products during the degradation process. Since the whole product is pure plant material, the waste product can be composted, and it can directly undergo natural degradation and enter the natural circulation law.

In order to achieve the above process, corresponding equipment is now provided, as shown in Figures 1-2.

The apparatus includes a first slurry tank 1, a second slurry tank 2, a slurry tank 18, and a mold set, the first slurry tank 1 is for accommodating the pulp slurry; the second slurry tank 2 is for accommodating the vegetable slurry; It has an inlet end connected to the first slurry tank 1 and the second slurry tank 2, and a liquid take-up port that interfaces with the mold group.

Preferably, the first slurry tank 1 is connected with a first fresh water tank 13 and a paper thick slurry tank 12, and the paper thick slurry tank 12 is connected to the first hydraulic pulper 16; the second slurry tank 2 is connected with The second fresh water tank 15 and the plant thick slurry tank 14 are connected to the second hydraulic pulper and the rake machine 17. Between the first slurry tank 1, the second slurry tank 2 and the slurry tank 18, between the first fresh water tank 13, the paper thick slurry tank 12 and the first slurry tank 1, the second fresh water tank 15, and the plant thick A pump valve assembly 21 is installed between the slurry tank 14 and the second slurry tank 2, and slurry transfer is achieved by the pump valve assembly 21.

The mold set includes a water mold 3, a molding die 4, and a dry mold 5 mounted with a heating device in sequence according to a process sequence, and any of the foregoing molds includes a first core 6 and a second core 7 that are matched with each other, generally first. The core 6 is on the top, the second core 7 is on the bottom, and each of the first cores 6 is mounted with a lifting drive member 8 (the cylinder can be used to implement the lifting and lowering drive member 8) for opening and closing the mold with the second core 7 The first core 6 and the second core 7 are connected with a vacuum gas path 19 for adsorbing the plant molded product, and a connection with the vacuum gas path 19 is provided with a filter structure for permeating moisture. The filter structure may be uniformly distributed with a plurality of small holes on each of the mold cores. These small holes are only for the passage of gas and water. When the vacuum gas passage 19 passes through the small holes to adsorb the plant molded product, the water can also function as a water removal function. The slurry is gradually solid, so that the plant molded product is molded in the core, and the vacuum degree of the vacuum gas path is generally controlled to be 0.05 MPa to 0.08 MPa.

A guide rail device is disposed between each of the molds, and the first core 6 or the second core 7 in each mold can be moved along the rail device, thereby realizing at least one component belonging to the first core 6 and the second of the two adjacent molds. The core 7 can open and close the mold, and the plant molded product can realize the transfer of the mold parts through the movement of each core and the opening and closing mold, so as to complete the corresponding process in each mold without manual intervention.

Wherein, the water mold 3 corresponds to the position of the liquid take-out port of the slurry tank 18, and the slurry in the pulp pool 18 is sucked by the vacuum gas path 19. The mold and the liquid intake port of the slurry tank 18 correspond to the use of the liquid in the slurry tank. There are various implementations in the prior art, and the two are usually directly connected or the mold is moved to the liquid intake port and then from the pulp pool. The liquid is pumped into the corresponding core. Specifically, in the present case, the position of the second core 7 of the water mold 3 and the liquid intake port of the slurry tank 18 may be two, or the second core 7 may be connected. Until the inlet of the casting liquid and the liquid inlet are docked, the slurry in the slurry tank 18 is sucked into the core by the vacuum gas path 19.

The guide rail device and which mold core is selected as the movable mold core in each mold are in various combinations. In this case, one of the designs is described by taking the example shown in the drawing: the rail device includes the upper rail 10, the lower rail 11, and the water mold 3 The first core 6 is movably mounted on the upper rail 10, and the upper rail 10 extends from the water mold 3 toward the molding die 4; the lower rail 11 has one end corresponding to the upper rail 10, and the other end passes through the molding die 4 and the drying die. 5 extending out, the molding die 4 is And the second cores 7 of the drying mold 5 are movably mounted on the lower rails 11, and each of the cores is generally driven by a cylinder to move along the rails.

Preferably, the bottom surface of each of the first core 6 and the second core 7 is further connected with a compressed gas path 20 for depressurizing the plant molded article to facilitate the transfer of the product.

The preferred implementation process of this case is as follows:

The pulp board or waste paper is disintegrated in the hydraulic disintegrator, and the obtained paper thick slurry is transferred to the paper thick slurry tank 12, and the plant raw materials are disintegrated in the hydraulic disintegrating machine, and then the machine is used to pick up The fiber is exposed to obtain a thick slurry of the plant, and the plant thick slurry is transferred to the plant thick slurry tank 14, and the paper thick slurry and water are pumped to the first slurry storage tank 1 by the pump valve assembly 21 to obtain a pulp slurry, and the plant thick pulp and water are pumped to the first The second slurry tank 2 obtains a plant slurry.

The pump valve is started to transport the pulp slurry into the slurry tank 18 via the pipeline, the vacuum gas path 19 of the second core 7 of the water mold 3 is opened, and the pulp slurry is sucked from the slurry tank 18 into the second core 7, while The water therein is discharged from the vacuum gas path 19 via the screen structure to shape the bottom layer of the plant molded article; then the pulp pool 18 is cleaned, the plant slurry is transferred to the pulp pool 18, and the vacuum of the second mold core 7 of the water mold 3 is opened. The gas path 19 draws the plant slurry in the slurry tank 18 into the second core 7, removes the moisture to form a sandwich of the plant molded product; cleans the pulp pool 18, and finally draws the pulp slurry from the vacuum gas path 19 to cast it. Above the interlayer, moisture is removed to form the surface layer of the plant molded article. So far, a three-layer structure of a plant molded article has been formed.

The first core 6 of the water mold 3 is driven downward by the lifting cylinder to be clamped with the second core 7, and the product is molded. After reaching a certain compression time, the vacuum gas path 19 of the second core 7 is closed to open the compressed gas path 20, while the vacuum core 19 of the first core 6 is opened to attract the product, the cylinder is lifted, and the product is adsorbed on the water. The first core 6 of the mold 3 follows the rise.

The first core 6 of the water mold 3 runs along the upper rail 10 in the direction of the forming mold 4 under the action of the horizontal cylinder 9, and the second core 7 of the forming mold 4 runs along the lower rail 11 toward the water mold 3 until both Corresponding to the upper and lower sides, the first core 6 of the water mold 3 moves downwardly under the action of the lifting cylinder to clamp with the second core 7 of the forming mold 4, and the first core 6 of the water mold 3 closes the vacuum gas path 19 and opens the compressed gas. The road 20 releases the product sucked by it, and the second core 7 of the forming mold 4 opens the vacuum gas path 19 to suck the product, the two cores are opened, and the reset is performed along the respective guide rails.

The first core 6 of the molding die 4 moves downward and is clamped with the second core 7 to further remove the moisture in the product. After the time is reached, the two molds are opened, and the vacuum gas path 19 and the compressed gas path 20 are passed through both. Corresponding operation, the article is adsorbed on the first core 6 of the forming mold 4, and the article moves upwards.

After the mold is opened, the second core 7 of the molding die 4 moves toward the water mold 3 to receive the next product, and the second core 7 of the dry mold 5 runs along the guide rail below the molding die 4, and the molding die 4 A core 6 is driven downward to mold the second core 7 of the drying mold 5, and the product is realized by the operation of the vacuum gas path 19 and the compressed gas path 20 Transfer to the second core 7 of the drying mold 5.

The second core 7 of the drying mold 5 is operated and reset along the guide rail, and the first core 6 is moved downward to the mold to be closed, and the heating device is turned on to dry the product, thereby obtaining a finished product.

In the equipment, the molds necessary for the completion of the products are designed to be installed in activities, and the corresponding rail devices are installed to realize the transfer and docking of the products by the molds, thereby reducing manual intervention, improving production efficiency and product yield.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications, combinations and changes may be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

A process for molding a plant molded article, characterized in that the process comprises the following contents:

Dewatering the pulp slurry to form a pulp envelope layer of the molded article;

Dehydrating the plant slurry to form a pulp layer of the molded article;

The pulp envelope layer and the vegetable pulp layer are laminated, and the non-fibrous material in the plant pulp layer is transferred to the pulp envelope layer to form a combination of the two.
The process for molding a plant molded product according to claim 1, wherein: the pulp raw material is added with water to obtain a paper thick slurry, and the paper thick slurry is diluted with water to obtain the paper pulp; the plant raw material is added with water to be broken and broken. A plant thick slurry is obtained, and the plant slurry is diluted with water to obtain a plant slurry.
The plant molding article molding process according to claim 2, wherein the non-fibrous substance in the vegetable pulp layer is phase-changed by changing the temperature of the molded article and the pressure applied, and migrates to the pulp envelope layer.
A process for molding a plant molded article according to claim 3, wherein said temperature is in the range of from 30 ° C to 280 ° C; and said pressure is in the range of from 1 to 11 MPa.
The plant molding article molding process according to claim 4, wherein the concentration of the pulp slurry is from 0.5% to 1.5%, and the concentration of the vegetable slurry is from 0.8% to 1.5%.
The plant molding product molding process according to claim 5, wherein the plant material comprises roots, stems, leaves, shells and crop straws of herbs, shrubs; and the pulp material comprises pulp board and regeneration paper.
A plant molding product molding apparatus, the apparatus comprising a pulp pool and a mold set, the pulp pool having a liquid take-up port for docking with the mold set, wherein the mold set comprises a water mold and a molding in sequence according to a process sequence a mold and a drying mold mounted with a heating device, the apparatus further comprising a first slurry tank and a second slurry tank

a first slurry tank for containing a pulp slurry;

a second slurry tank for containing a plant slurry;

a slurry tank having an inlet end connected to the first slurry tank and the second slurry tank;

The water mold, the molding die and the drying die each include a first core and a second core which are matched with each other, and each of the first cores is provided with a lifting drive member for driving the mold and the second core, and each of the mold cores A core and a second core are connected with a vacuum gas path for adsorbing the plant molded product, and a filter structure for allowing moisture to pass through the connection with the vacuum gas path; The first core or the second core in the mold can be moved along the rail device, so that at least one component belongs to the first core and the second core can be opened and closed.
A plant molding product molding apparatus according to claim 7, wherein said rail device comprises an upper rail and a lower rail, and said first core of said water mold is movably mounted on said upper rail, said upper rail Extending from the water mold toward the molding die; one end of the lower rail corresponds to the upper rail, and the other end extends through the molding die and the drying die, and the Both the mold and the second core of the dry mold are movably mounted on the lower rail.
A plant molding product molding apparatus according to claim 8, wherein a bottom surface of each of the first core and the second core is further connected with a compressed gas path for depressurizing the plant molded article; The second core of both the first core of the water mold, the forming mold, and the drying mold are driven by the cylinder to move along the rail device.
A plant molding product molding apparatus according to claim 9, wherein said first slurry tank is connected with a first fresh water tank, a paper thick slurry tank, said paper thick slurry tank and said first hydraulic crushing a second slurry tank connected with a second fresh water tank and a plant thick slurry tank, wherein the plant thick slurry tank is connected with a second hydraulic pulper and a rake machine; the first slurry tank, Between the second slurry tank and the slurry tank, between the first fresh water tank, the paper thick slurry tank and the first slurry tank, a pump valve is installed between the second fresh water tank, the plant thick slurry tank and the second slurry tank Component.