Molded pulp dry production system
By using nozzle high-pressure nozzle spraying and multi-axis robotic arm adjustment technology in the paper plastic production process, the problems of high energy consumption and low production efficiency of wet blanks are solved, efficient production and differentiated distribution of local strength are achieved, and carbon emissions are reduced.
Patent Information
- Application Number
- CN202420750028.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-11
AI Technical Summary
In the existing paper and plastic production process, wet blanks consume high energy, low production efficiency, large carbon emissions, and product strength uniformity cannot meet the strength differentiation needs of refined design.
The dry production system of pulp molding is adopted. The pulp is sprayed onto the surface of the wet blank molding mold through a nozzle under the action of high-pressure airflow, so that moisture seeps out, reduces the moisture content of the wet pulp, and directly performs hot pressing and shaping, cancels drying lines, and uses many uses. The shaft robotic arm adjusts the spray angle to form a local spray overlap area to increase local strength.
It realizes drying without drying line, high production efficiency, low carbon emissions, and can form a differentiated distribution of local strength in the product according to design requirements.
Smart Images
Figure CN222226944U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of pulp molding, and in particular to a pulp molding dry process production system. Background Art
[0002] The conventional production process of paper plastic in the prior art is: beating - slurry absorption - transfer - drying - hot pressing shaping - trimming - packing and packaging. The slurry absorption process is that the raw materials are first crushed and melted in water to form a suspension solution of a certain concentration, and then the slurry absorption die head absorbs the water through the suction force of the slurry absorption holes on the mold, so that the fibers are covered on the surface of the slurry absorption die head, and finally a wet blank of the product is formed. Since the moisture content of the wet blank is about 70%, the wet blank generally needs to be dried through a natural gas drying line to make its moisture content less than 5%, and then hot pressed and shaped.
[0003] Therefore, in the conventional production process of paper plastics in the prior art, the drying process of wet blanks consumes a lot of energy, has low production efficiency, and is not conducive to the contemporary concept of energy conservation and emission reduction. Moreover, the paper plastic products produced by the conventional paper plastic production process are theoretically uniform in strength, which cannot meet the differentiated strength distribution required by the refined design, and cannot form the requirement of additional strengthening of the material strength at a local position according to the actual packaging requirements.
[0004] Therefore, there is an urgent need for a new paper-plastic preparation system on the market to solve the problems of high energy consumption for wet blank drying, low production efficiency and high carbon emissions in the paper-plastic production process in the prior art. Utility Model Content
[0005] The disclosed embodiment provides a pulp molding dry production system to solve the problems of high energy consumption in wet blank drying, low production efficiency and high carbon emissions in the paper molding production process in the prior art.
[0006] The dry pulp molding production system provided by the embodiment of the present disclosure includes a fiber pool, a feeder, a spraying machine and a wet blank forming mold arranged in sequence;
[0007] The feeder is used to supply the pulp liquid in the fiber pool to the spraying machine;
[0008] The spraying machine has a plurality of nozzles and a plurality of multi-axis mechanical arms connected to the nozzles in a one-to-one correspondence;
[0009] The nozzles are connected to the spraying machine through respective slurry delivery hoses, and can change the spraying angle toward the wet blank forming mold under the drive of the multi-axis robot arm.
[0010] In one possible implementation, the wet blank forming mold includes an attachment mold;
[0011] The mold attachment mold has a plurality of paper-plastic molding surfaces, and a plurality of liquid seepage holes are opened in the paper-plastic molding surfaces;
[0012] In one embodiment, the wet blank forming mold further comprises a slurry suction die head;
[0013] The slurry suction die head is arranged on the side of the attachment mold facing away from the paper-plastic molding surface, and is used for sucking water through the liquid seepage holes.
[0014] In one possible implementation, the wet blank forming mold further comprises a hot pressing mold;
[0015] The hot pressing mold is arranged at a corresponding interval with the attachment mold and can move toward the attachment mold to press and heat the wet pulp attached to the paper-plastic molding surface.
[0016] In one possible implementation manner, the attachment mold is a convex mold, the paper-molding surface is a convex surface in the convex mold, and the hot pressing mold is a concave mold and has a concave hot pressing surface adapted to the paper-molding surface;
[0017] Alternatively, the attachment mold is a concave mold, the paper-plastic molding surface is a recessed surface in the concave mold, and the hot pressing mold is a convex mold having a convex hot pressing surface adapted to the paper-plastic molding surface.
[0018] In one possible implementation manner, the spraying direction of the nozzle forms a spraying angle of 90°±5° with the normal direction of the paper molding surface.
[0019] In one possible implementation, the feeder has a screw feeding mechanism;
[0020] The screw feeding mechanism comprises a feeding barrel and a screw feeding rod arranged in the feeding barrel;
[0021] Wherein, a through drainage hole is provided on the wall of the feeding cylinder.
[0022] In one possible implementation, the feeder further includes a water spray nozzle and a humidity detector;
[0023] The humidity detector is arranged in the feeding barrel and is electrically connected to the water spray nozzle;
[0024] The water spray nozzle is arranged above the feeding cylinder and is used for spraying and humidifying the feeding cylinder.
[0025] In one possible implementation, among the plurality of nozzles, the multi-axis robot arm can drive and change the spraying angles of at least two of the nozzles so that the two nozzles form a local overlapping spraying reinforcement zone.
[0026] In one possible implementation manner, the spraying pressure of the nozzle is 0.1 MPa to 0.3 MPa.
[0027] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:
[0028] The pulp molding dry production system provided by the embodiment of the present disclosure sprays pulp liquid onto the surface of the wet blank forming mold through the blowing effect of the nozzle in the high-pressure airflow, and a large amount of water in the pulp liquid can be separated and seeped out in the process of the pulp liquid being sprayed from the nozzle and attached to the wet blank forming mold through high-speed impact, so that the water content of the wet pulp sprayed onto the surface of the wet blank forming mold is greatly reduced, and there is no need to dry it through a drying line subsequently, and the sprayed wet pulp can be directly hot-pressed and shaped by a hot-pressing shaping device, which has the beneficial effects of not requiring drying by a drying line, high production efficiency and low carbon emissions.
[0029] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:
[0031] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.
[0032] Figure 1 A schematic diagram of a pulp molding dry process production system provided by an embodiment of the present disclosure is shown;
[0033] Figure 2 The layout diagram of the nozzle and the wet blank forming mold in the pulp molding dry production system provided by the embodiment of the present disclosure is shown;
[0034] Figure 3 It shows a first structural schematic diagram of a wet blank forming mold in a pulp molding dry process production system provided by an embodiment of the present disclosure;
[0035] Figure 4 A second structural schematic diagram of a wet blank forming mold in a pulp molding dry process production system provided by an embodiment of the present disclosure is shown.
[0036] Explanation of the numbers in the figure: 1. Fiber pool; 2. Feeder; 21. Feeding barrel; 22. Water spray nozzle; 3. Spraying machine; 31. Nozzle; 32. Multi-axis robotic arm; 4. Wet blank forming mold; 41. Attachment mold; 411. Paper plastic forming surface; 412. Liquid seepage hole; 42. Slurry suction die head; 43. Hot pressing mold. DETAILED DESCRIPTION
[0037] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.
[0038] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0039] Combination Figure 1 and Figure 2 As shown, the embodiment of the present disclosure provides a pulp molding dry production system, which includes a fiber pool 1, a feeder 2, a spray machine 3 and a wet blank forming mold 4 arranged in sequence; the feeder 2 is used to supply the pulp liquid in the fiber pool 1 to the spray machine 3; the spray machine 3 has a plurality of nozzles 31, and a plurality of multi-axis robotic arms 32 connected to the nozzles 31 in a one-to-one correspondence; the nozzles 31 are connected to the spray machine 3 through their own pulp delivery hoses, and can change the spraying angle toward the wet blank forming mold 4 under the drive of the multi-axis robotic arm 32.
[0040] When the pulp molding dry production system is preparing for paper molding production, the pulp liquid in the fiber pool 1 is first supplied to the spraying machine 3 through the feeder 2, and then the spraying machine 3 sprays toward the wet blank forming mold 4 at different angles through multiple nozzles 31. Since the nozzle 31 sprays the pulp liquid on the surface of the wet blank forming mold 4 under the action of high-pressure airflow, the process of the pulp liquid being sprayed from the nozzle 31 and attached to the wet blank forming mold 4 by high-speed impact will cause a large amount of water in the pulp liquid to be analyzed and seeped out, thereby greatly reducing the water content of the wet pulp sprayed on the surface of the wet blank forming mold 4 and further improving the shaping and solidifying ability. There is no need to dry it through a drying line in the future, and the wet pulp sprayed on the surface of the wet blank forming mold 4 can be directly hot-pressed and shaped by a hot-pressing shaping device.
[0041] Moreover, since the multiple nozzles 31 are respectively connected to the multi-axis robotic arm 32 in a one-to-one manner, the spraying angles of the multiple nozzles 31 toward the wet blank forming mold 4 can be flexibly adjusted and changed through the drive of the multi-axis robotic arm 32, ensuring that the pulp liquid can be evenly sprayed onto the surface of the wet blank forming mold 4.
[0042] In addition, the multi-axis robot arm 32 can be used to change the spraying angles of two adjacent nozzles 31 so that the two adjacent nozzles 31 can form a local spray overlapping area, so that the pulp liquid in the spray overlapping area can be hot-pressed and shaped to form an effect of increasing the local structural thickness and strengthening the local structural strength, thereby meeting the differentiated strength distribution required by the refined design and forming the packaging requirements of additionally strengthening the material strength at the local position according to the actual packaging requirements.
[0043] In summary, compared with the conventional paper-molding production process in the prior art, the pulp molding dry production system provided by the embodiment of the present disclosure sprays the pulp liquid onto the surface of the wet blank forming mold 4 through the blowing effect of the nozzle 31 in the high-pressure airflow, and in the process of the pulp liquid being sprayed from the nozzle 31 and attached to the wet blank forming mold 4 by high-speed impact, a large amount of water in the pulp liquid can be separated and seeped out, so that the water content of the wet pulp sprayed onto the surface of the wet blank forming mold 4 is greatly reduced, and there is no need to dry it through a drying line subsequently, and the sprayed wet pulp can be directly hot-pressed and shaped by a hot pressing shaping device, which has the beneficial effects of no need for drying by a drying line, high production efficiency and low carbon emissions.
[0044] In one possible implementation manner, the wet blank forming mold 4 includes an attachment mold 41 ; the attachment mold 41 has a plurality of paper-plastic forming surfaces 411 , and a plurality of liquid seepage holes 412 are opened in the paper-plastic forming surfaces 411 .
[0045] Specific, combined Figure 2 To further explain in detail, a mold attachment mold 41 is arranged in the wet blank forming mold 4, and the mold attachment mold 41 has a plurality of paper-plastic forming surfaces 411, and a plurality of seepage holes 412 are opened in the paper-plastic forming surface 411, so that when the nozzle 31 sprays the pulp liquid on the paper-plastic forming surface 411 in the mold attachment mold 41, the moisture in the pulp liquid will quickly penetrate the mold attachment mold 41 from the seepage holes 412 under the action of the high-pressure airflow of the nozzle 31 and the impact of the pulp liquid itself, thereby greatly reducing the moisture content of the wet pulp sprayed on the paper-plastic forming surface 411 and further improving the shaping and solidifying ability, so that the subsequent hot pressing shaping device can perform hot pressing shaping on the wet pulp.
[0046] The above-mentioned liquid seepage holes 412 can be specifically evenly arranged in multiple in the paper-plastic molding surface 411, and the liquid seepage holes 412 can be, but are not limited to, arranged as capillary holes, or conical holes with a large inlet and a small outlet.
[0047] In one embodiment, the wet blank forming mold 4 further includes a slurry suction die head 42 ; the slurry suction die head 42 is disposed on the side of the attachment mold 41 facing away from the paper-plastic forming surface 411 , and is used to absorb moisture through the liquid seepage holes 412 .
[0048] Specific, combined Figure 3To further explain in detail, the slurry suction die head 42 can be specifically connected to the vacuum extraction equipment, and a plurality of suction holes can be evenly opened on the surface of the slurry suction die head 42, and the suction vacuum degree of the slurry suction die head 42 only needs to be set at about 0.05 vacuum degree, so as to timely absorb and collect the water seeping out of the seepage holes 412, thereby ensuring that the seepage holes 412 in the attached mold 41 can always smoothly seep out the water in the pulp liquid.
[0049] The specific configuration of the slurry suction die head 42 has a simple structure and can realize the function of timely and rapid suction of water seeping out of the liquid seepage hole 412 by only applying a very small suction vacuum.
[0050] In one embodiment, the wet blank forming mold 4 further includes a hot pressing mold 43 ; the hot pressing mold 43 is spaced apart from the attachment mold 41 and can move toward the attachment mold 41 to squeeze and heat the wet slurry attached to the paper plastic forming surface 411 .
[0051] Specific, combined Figure 3 To further explain in detail, a hot pressing mold 43 is also provided in the wet blank forming mold 4, and the hot pressing mold 43 is spaced and arranged correspondingly to the attachment mold 41, and can move toward the attachment mold 41 to squeeze and heat the wet slurry attached to the paper plastic forming surface 411.
[0052] The hot pressing mold 43 can be heated by electric heating, gas heating and other methods, but not limited to them. The hot pressing mold 43 also uses a "motor + screw nut transmission mechanism" to achieve the function of moving and extruding toward the attached mold 41.
[0053] Furthermore, the hot pressing mold 43 can be configured to match the shape of the attachment mold 41 , and the size of the hot pressing mold 43 can be slightly larger than the attachment mold 41 .
[0054] In one embodiment, the attachment mold 41 is a convex mold, the paper-molding surface 411 is a convex surface in the convex mold, and the hot pressing mold 43 is a concave mold and has a concave hot pressing surface adapted to the paper-molding surface 411;
[0055] Alternatively, the attachment mold 41 is a concave mold, the paper-plastic molding surface 411 is a recessed surface in the concave mold, and the hot pressing mold 43 is a convex mold having a convex hot pressing surface adapted to the paper-plastic molding surface 411 .
[0056] Specific, combined Figure 3 and Figure 4 For further details, Figure 3 The corresponding attachment mold 41 is a convex mold, the paper-plastic molding surface 411 is a convex surface in the convex mold, and the hot pressing mold 43 is a concave mold and has a concave hot pressing surface adapted to the paper-plastic molding surface 411; Figure 4The corresponding attachment mold 41 is a concave mold, the paper-plastic molding surface 411 is a recessed surface in the concave mold, and the hot pressing mold 43 is a convex mold and has a convex hot pressing surface adapted to the paper-plastic molding surface 411 .
[0057] The above two configurations correspond to the production of paper-plastic parts of different packaging types, and the mold attachment mold 41 and the hot pressing mold 43 can be correspondingly configured into shapes that match each other.
[0058] In one embodiment, the spraying direction of the nozzle 31 forms a spraying angle of 90°±5° with the normal direction of the paper molding surface 411 .
[0059] The spraying direction of the nozzle 31 is set to form a spraying angle of 90°±5° with the normal of the paper-plastic molding surface 411, so as to maximize the spraying range of the nozzle 31, so that the paper pulp liquid can be sprayed more evenly and cover the paper-plastic molding surface 411 of the attached mold 41 in a larger range.
[0060] Of course, since the nozzle 31 is connected and driven by the multi-axis robot arm 32, the multi-axis robot arm 32 can also be used to flexibly and slightly change the spraying angle of the nozzle 31 in real time, thereby further improving the spraying flexibility of the nozzle 31.
[0061] In one possible implementation, the feeder 2 has a screw feeding mechanism; the screw feeding mechanism includes a feeding barrel 21 and a spiral feeding rod disposed in the feeding barrel 21; wherein the barrel wall of the feeding barrel 21 is provided with a penetrating drainage hole.
[0062] Specific, combined Figure 1 To further explain in detail, a screw feeding mechanism is arranged in the feeder 2, and is specifically arranged as a feeding barrel 21 and a spiral feeding rod located in the feeding barrel 21, and a through drainage hole is opened on the barrel wall of the feeding barrel 21, so that when the spiral feeding rod rotates around its own axis, the pulp liquid can be squeezed and drained to a certain extent in the feeding barrel 21, and the excess water will be discharged from the drainage hole, which can reduce the water content of the pulp liquid to a certain extent, thereby facilitating the subsequent spraying, water penetration and hot pressing shaping of the nozzle 31.
[0063] In one embodiment, the feeder 2 also includes a water spray nozzle 22 and a humidity detector; the humidity detector is arranged in the feeding barrel 21 and is electrically connected to the water spray nozzle 22; the water spray nozzle 22 is arranged above the feeding barrel 21 and is used to spray humidification to the feeding barrel 21.
[0064] Specific, combined Figure 1To further explain in detail, a humidity detector is provided in the feeding barrel 21, and the humidity detector is electrically connected to the water spray nozzle 22 above the feeding barrel 21, so that when the water content of the pulp liquid in the feeding barrel 21 is too low, which is not conducive to the nozzle 31 to spray the pulp liquid evenly, the humidity detector can detect this situation accordingly, and electrically control the water spray nozzle 22 to spray humidification to the feeding barrel 21 in time, thereby ensuring that the water content of the pulp liquid is within the optimal humidity range.
[0065] The specific arrangement of the humidity detector and the water spray nozzle 22 has the beneficial effects of simple structure and the ability to flexibly and intelligently control the moisture content of the pulp liquid.
[0066] In one possible implementation, among the multiple nozzles 31, the multi-axis robot arm 32 can at least drive and change the spraying angles of two nozzles 31 so that the two nozzles form a local overlapping spraying reinforcement area.
[0067] Specifically, the spraying angles of two adjacent nozzles 31 can be changed by two adjacent multi-axis robotic arms 32, so that the two adjacent nozzles 31 can form a local spray overlapping area, so that the pulp liquid in the spray overlapping area can be formed after hot pressing and shaping, so as to form an effect of increasing the local structural thickness and strengthening the local structural strength, so as to meet the differentiated strength distribution required by the refined design, and form the packaging requirement of additionally strengthening the material strength at the local position according to the actual packaging requirements.
[0068] In one embodiment, the spraying pressure of the nozzle 31 is 0.1 MPa to 0.3 MPa.
[0069] The spraying pressure of the nozzle 31 is limited to 0.1Mpa to 0.3Mpa, which is a moderate value, and can ensure that the pulp liquid can be sprayed out evenly at a moderate speed and adhere to the surface of the wet blank forming mold 4.
[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0071] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. A pulp molding dry process production system, characterized in that: It comprises a fiber pool (1), a feeder (2), a shotcrete machine (3) and a wet blank forming mold (4) which are arranged in sequence; The feeder (2) is used to supply the pulp liquid in the fiber pool (1) to the spraying machine (3); The spraying machine (3) comprises a plurality of nozzles (31) and a plurality of multi-axis mechanical arms (32) connected to the nozzles (31) in a one-to-one correspondence; The nozzles (31) are connected to the spraying machine (3) through respective slurry delivery hoses, and can change the spraying angle toward the wet blank forming mold (4) under the drive of the multi-axis mechanical arm (32).
2. The pulp molding dry production system according to claim 1, characterized in that: The wet blank forming mold (4) comprises a mold attachment mold (41); The attachment mold (41) has a plurality of paper-plastic molding surfaces (411), and a plurality of liquid seepage holes (412) are provided in the paper-plastic molding surfaces (411).
3. The pulp molding dry process production system according to claim 2, characterized in that: The wet blank forming mold (4) also includes a slurry suction die head (42); The slurry suction die head (42) is arranged on the side of the attachment mold (41) facing away from the paper-plastic molding surface (411) and is used to suck moisture through the liquid seepage holes (412).
4. The pulp molding dry production system according to claim 2, characterized in that: The wet blank forming mold (4) further comprises a hot pressing mold (43); The hot pressing mold (43) is arranged at a corresponding interval to the attaching mold (41) and is capable of moving toward the attaching mold (41) to press and heat the wet pulp attached to the paper-plastic molding surface (411).
5. The pulp molding dry process production system according to claim 4, characterized in that: The attachment mold (41) is a convex mold, the paper-plastic molding surface (411) is a convex surface in the convex mold, and the hot pressing mold (43) is a concave mold and has a concave hot pressing surface adapted to the paper-plastic molding surface (411); Alternatively, the attachment mold (41) is a concave mold, the paper-plastic molding surface (411) is a recessed surface in the concave mold, and the hot pressing mold (43) is a convex mold and has a convex hot pressing surface adapted to the paper-plastic molding surface (411).
6. The pulp molding dry process production system according to claim 2, characterized in that: The spraying direction of the nozzle (31) forms a spraying angle of 90°±5° with the normal direction of the paper plastic forming surface (411).
7. The pulp molding dry process production system according to claim 1, characterized in that: The feeder (2) has a screw feeding mechanism; The screw feeding mechanism comprises a feeding barrel (21) and a screw feeding rod arranged in the feeding barrel (21); Wherein, the wall of the feeding cylinder (21) is provided with a through drainage hole.
8. The pulp molding dry process production system according to claim 7, characterized in that: The feeder (2) further comprises a water spray nozzle (22) and a humidity detector; The humidity detector is arranged in the feeding cylinder (21) and is electrically connected to the water spray nozzle (22); The water spray nozzle (22) is arranged above the feeding cylinder (21) and is used for spraying and humidifying the feeding cylinder (21).
9. The pulp molding dry process production system according to any one of claims 1 to 8, characterized in that: Among the plurality of nozzles (31), the multi-axis robot arm (32) is capable of driving at least two of the nozzles (31) to change the spraying angles so that the two nozzles form a local overlapping spraying reinforcement zone.
10. The pulp molding dry process production system according to claim 9, characterized in that: The spraying pressure of the nozzle (31) is 0.1Mpa to 0.3Mpa.