Composite bamboo and wood fiber mould pressing tray and mould pressing mould thereof
By compositely impregnating the prototyping layer and glue connection on the surface of the bamboo and wood fiber molded pallet, the existing bamboo and wood fiber pallets have been solved, and the effect of more wear-resistant, durable and efficient production is achieved.
Patent Information
- Application Number
- CN202421662571.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing bamboo and wood fiber pallets are thicker after molding, have high cost, and are insufficient in load-bearing and bending resistance, resulting in demoulding deformation and short service life.
Using a composite bamboo and wood fiber molding tray, a more wear-resistant and durable surface is formed by combining the immersion layer on the upper and/or the lower surface of the molded fiberboard body, and bonding it to form a more wear-resistant and durable surface.
Improves the wear and durability of the pallet, extends service life, and improves the robotic removal efficiency by reducing surface roughness.
Smart Images
Figure CN222972389U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bamboo and wood molded pallets, and particularly relates to a composite bamboo and wood fiber molded pallet and a molding die thereof. Background Art
[0002] Compared with plastic pallets, bamboo and wood molded pallets have the advantages of environmental protection and low cost. Due to the strength requirement of the pallet, the thickness of the existing bamboo and wood fiber pallets is relatively thick after molding, and more materials are needed, resulting in higher costs. Secondly, in order to meet the strength requirements, on the premise of a relatively thick thickness, the existing pallets are further formed with reinforcing ribs on the upper and / or lower surfaces of the pallet. Although there are reinforcing ribs, the load-bearing performance and bending resistance of the pallet still have defects. For example, when demolding after molding, there is a large shrinkage stress in the pallet, resulting in demolding deformation and affecting the final use of the pallet.
[0003] Patent CN117863654A discloses a flat honeycomb fiber molded pallet, which includes a fiber molded plate body made of fiber materials through molding. A number of upwardly recessed honeycomb blind holes are directly molded on the lower surface of the fiber molded plate body, and the honeycomb blind holes form a honeycomb structure.
[0004] In the above patent, since the molded fiber plate body is made of fiber materials through molding, during long-term use, fiber materials will fall off from the surface of the molded fiber plate body, resulting in a significant reduction in the load-bearing strength of the plate body and a low service life of the plate body. The surface roughness in the thickness direction of the existing molded fiber plate body is relatively large, resulting in that the molded fiber plate body can only be taken manually, with very low efficiency and high labor intensity. At the same time, there are also very large potential production safety hazards. Summary of the Utility Model
[0005] The purpose of the utility model is to solve the above problems and provide a composite bamboo and wood fiber molded pallet and a molding die thereof that can solve the above technical problems.
[0006] To achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The composite bamboo and wood fiber molded pallet includes a molded fiber plate body made of crushed bamboo and / or wood fiber materials through molding. An impregnated profiling layer is compounded on the upper surface and / or lower surface of the molded fiber plate body, and the impregnated profiling layer is integrated with the molded fiber plate body during molding.
[0008] Further, the fiber materials are mixed with glue and / or one surface of the impregnated profiling layer close to the molded fiber plate body is provided with glue, and the impregnated profiling layer and the molded fiber plate body are connected by glue.
[0009] Further, the molded fiber board body is any one of a molded fiber honeycomb board body and a molded fiber pallet board.
[0010] Further, the impregnated profiling layer is impregnated kraft paper or an impregnated plastic film.
[0011] Further, impregnated profiling layers are respectively compounded on the upper surface and the lower surface of the molded fiber board body. The impregnated profiling layers are defined as an upper impregnated profiling layer and a lower impregnated profiling layer, and the materials of the upper impregnated profiling layer and the lower impregnated profiling layer are the same or different.
[0012] Further, a plurality of pressure relief through holes distributed in an array are provided on the upper impregnated profiling layer and / or the lower impregnated profiling layer.
[0013] Further, the surface roughness of the impregnated profiling layer is less than the roughness of the upper surface or the lower surface of the molded fiber board body.
[0014] The present application also provides a molding die for a composite bamboo and wood fiber molded pallet, and the molding die is used for molding and manufacturing the composite bamboo and wood fiber molded pallet.
[0015] Further, the molding die includes a fixed die and at least one moving die that moves relative to the fixed die in the vertical direction. The moving die and the fixed die are closed to form at least one molding pallet cavity.
[0016] The present application also provides a manufacturing method for a composite bamboo and wood fiber molded pallet, including the following steps:
[0017] S1. Prepare a molding die and two impregnated profiling layers. The molding die includes a fixed die and at least one moving die that moves relative to the fixed die in the vertical direction. The moving die and the fixed die are closed to form at least one molding pallet cavity.
[0018] S2. When the moving die is in the open state, lay one of the impregnated profiling layers in the fixed die in S1, and add crushed fiber material mixed with glue into the fixed die. At this time, the impregnated profiling layer is at the bottom of the crushed fiber material; and lay the other impregnated profiling layer on top of the crushed fiber material;
[0019] Level the crushed fiber material and then lay the other impregnated profiling layer on top of the crushed fiber material;
[0020] S3. Driven by a driving force, the moving die and the fixed die in S2 are closed. After the molding die performs molding and holds pressure for a set time, the composite bamboo and wood fiber molded pallet is manufactured in the molding pallet cavity.
[0021] S4. Driven by the driving force, the movable mold and the fixed mold in S3 are separated, and the composite bamboo-wood fiber molded tray is sucked by a suction cup manipulator and transferred outside the molding die, that is, the manufacturing is completed.
[0022] Further, there are two movable molds, and the fixed mold is located between the two movable molds. After each movable mold is combined with the fixed mold respectively, a molding tray cavity is formed.
[0023] Further, the two movable molds move relative to the fixed mold alternately.
[0024] The upper surface of the fixed mold is provided with a first cavity. One movable mold above the fixed mold is a convex mold. At this time, when the two are combined, a molding tray cavity is obtained.
[0025] The other movable mold below the fixed mold is a concave mold. The concave mold has a second cavity. When the lower surface of the fixed mold and the second cavity are combined, another molding tray cavity is obtained.
[0026] Compared with the existing technology, the advantages of the present application are as follows: By using the technology of compounding the impregnated profiling layer and the molded fiberboard body, and compounding the impregnated profiling layer on the upper surface and / or the lower surface of the molded fiberboard body, the wear resistance and durability of the tray surface can be improved, and the service life of the tray can be extended. At the same time, due to the setting of the impregnated profiling layer, the surface roughness of the molded fiberboard body in the thickness direction becomes smaller, and the manipulator can take out the finished product more quickly, improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 is a three-dimensional structural schematic diagram of the composite bamboo-wood fiber molded tray of the present utility model;
[0028] Figure 2 is Figure 1 a partial enlarged detailed view of the structure of area A in
[0029] Figure 3 is a top view structural schematic diagram of the composite bamboo-wood fiber molded tray of the present utility model;
[0030] Figure 4 is Figure 3 a side view along the C-C section line in
[0031] Figure 5 is Figure 4 a partial enlarged detailed view of the structure of area B in
[0032] Figure 6 is another three-dimensional structural schematic diagram of the composite bamboo-wood fiber molded tray of the present utility model;
[0033] Figure 7Explosion separation schematic diagram of the composite bamboo and wood fiber compression molding tray of the present utility model;
[0034] Figure 8 Simplified structural schematic diagram of the compression molding die of the present utility model;
[0035] In the figure, the compression molding fiber board body 1, the board thickness 1S, the forming depression 10, the arc concave surface 100, the arc chamfered surface 101, the draft arc concave surface 102, the forming protrusion 11, the wall thickness 11S, the arc convex surface 110, the bisecting line 12, the reserved part 13, the impregnated profiling layer 2, the upper impregnated profiling layer 20, the lower impregnated profiling layer 21, the pressure relief through hole 210, the fixed die 3, and the moving die 4. Specific embodiments
[0036] The following are specific embodiments of the present utility model and in combination with the attached drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments. Embodiment 1
[0037] As Figures 1 - 2 shown, the composite bamboo and wood fiber compression molding tray of this embodiment includes a compression molding fiber board body 1 made by compression molding of bamboo and / or wood crushed fiber materials. For example, the compression molding fiber board body 1 is made of pure bamboo materials, the compression molding fiber board body 1 is made of wood materials, or the compression molding fiber board body 1 can also be obtained by mixing bamboo and wood.
[0038] As Figures 1 - 2 shown, an impregnated profiling layer 2 is compounded on the upper surface and / or the lower surface of the compression molding fiber board body 1, and there are the following several schemes:
[0039] First, an impregnated profiling layer 2 is compounded on the upper surface of the compression molding fiber board body 1.
[0040] Second, an impregnated profiling layer 2 is compounded on the lower surface of the compression molding fiber board body 1.
[0041] Third, impregnated profiling layers 2 are compounded on both the upper and lower surfaces of the compression molding fiber board body 1.
[0042] The third is the most preferred scheme and can ensure that no fibers fall off.
[0043] For example, impregnated kraft paper is impregnated in a flame retardant liquid to form a flame retardant function, and impregnated kraft paper is impregnated in a waterproof material to form a waterproof function. The impregnated profiling layer 2 is integrated with the compression molding fiber board body 1 during the compression molding of the compression molding fiber board body 1. Since the compression molding fiber board body 1 is made by compression molding of fiber materials, during long-term use, fiber materials will fall off from the surface of the compression molding fiber board body 1, making the use cleaner. The impregnated profiling layer 2 is compounded on the upper surface and / or the lower surface of the compression molding fiber board body 1 to improve the wear resistance and durability of the tray surface and extend the service life of the tray.
[0044] Secondly, the lamination of the impregnated profiling layer 2 can improve the structural strength of the bamboo and wood fiber molded tray.
[0045] The fiber material is mixed with glue and / or one surface of the impregnated profiling layer 2 close to the molded fiber board body 1 is provided with glue, and the impregnated profiling layer 2 and the molded fiber board body 1 are connected by glue. At the same time, in a preferred embodiment, in this embodiment, the fiber material is mixed with glue and one surface of the impregnated profiling layer 2 close to the molded fiber board body 1 is provided with glue. Specifically, a layer of adhesive is evenly applied on the contact surface between the impregnated profiling layer 2 and the molded fiber board body 1. At the same time, the molded fiber board body 1 is mixed with glue before molding, and then the impregnated profiling layer 2 and the molded fiber board body 1 are connected by high-pressure glue.
[0046] The molded fiber board body 1 of this embodiment is any one of a molded fiber honeycomb board body and a molded fiber pallet. In this embodiment, the molded fiber board body 1 is designed as a molded fiber honeycomb board body. The honeycomb structure board body has better compressive strength and the advantage of cost savings.
[0047] The impregnated profiling layer 2 is an impregnated kraft paper or an impregnated plastic film. The impregnated profiling layer 2 is an impregnated functional material, such as, for example, mildew-proof, waterproof and fireproof materials, etc. The impregnated plastic film is, for example, a nylon film, etc.
[0048] As a preferred solution, impregnated profiling layers 2 are respectively laminated on the upper surface and the lower surface of the molded fiber board body 1. The impregnated profiling layers 2 are defined as an upper impregnated profiling layer 20 and a lower impregnated profiling layer 21. Since the substances and friction degrees contacted by the upper impregnated profiling layer 20 and the lower impregnated profiling layer 21 during operation are different, the materials of the upper impregnated profiling layer 20 and the lower impregnated profiling layer 21 are the same or different.
[0049] At the same time, during the die pressing process, there will be some air that has not been discharged between the impregnated profiling layer 2 and the molded fiber board body 1. A number of pressure relief through holes 210 are provided on the upper impregnated profiling layer 20 and / or the lower impregnated profiling layer 21 and are arranged in an array. During die pressing, the air can be discharged from the pressure relief through holes 210, so that the two are more closely attached, preventing air from being trapped in the molded fiber board body 1 and affecting the structural strength of the finished tray.
[0050] The surface roughness of the impregnated profiling layer 2 is less than the surface roughness of the upper surface or the lower surface of the molded fiber board body 1. A smooth surface usually means less wear. Therefore, the surface roughness of the impregnated profiling layer 2 being less than that of the molded fiber board body 1 can improve the wear resistance of the tray and extend its service life, so as to completely solve the industrial technical defect that fiber boards or trays are not conducive to being picked up and transferred by a manipulator, and fill the gap of defects in production and use, etc. caused by the lack of lamination of fiber molded boards.
[0051] Furthermore, the impregnated profiling layer 2 has a smaller surface roughness. Another advantage is that after the molding process is completed, since the composite bamboo and wood fiber molded tray is in the molding groove and has a large volume, it is not easy for workers to take it out using a manipulator. Now that the impregnated profiling layer 2 has a smaller surface roughness, the manipulator can better take out the composite bamboo and wood fiber molded tray from the molding groove, greatly improving the work efficiency. Embodiment 2
[0052] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The different structure lies in that for the composite bamboo and wood fiber molded tray in Embodiment 1 above, this embodiment provides an explanation of the manufacturing method of the composite bamboo and wood fiber molded tray.
[0053] The manufacturing method uses a molding die. The structure of the molding die includes a fixed die 3 and at least one moving die 4 that moves relative to the fixed die 3 in the vertical direction.
[0054] The steps of this manufacturing method are as follows:
[0055] S1. Prepare a molding die and two impregnated profiling layers 2. The molding die includes a fixed die 3 and at least one moving die 4 that moves relative to the fixed die 3 in the vertical direction. The moving die 4 and the fixed die 3 are closed to form at least one molded tray cavity.
[0056] In this step, the moving die 4 and the fixed die 3 described cooperate for molding through a power device such as hydraulic or electromagnetic drive. Preferably, it is the hydraulic method.
[0057] S2. When the moving die 4 is in the open state, lay one impregnated profiling layer 2 in the fixed die 3 in S1, and add crushed fiber material mixed with glue to the fixed die 3. At this time, the impregnated profiling layer 2 is at the bottom of the crushed fiber material; and lay the other impregnated profiling layer 2 on top of the crushed fiber material, that is, after the crushed fiber material is leveled, lay the other impregnated profiling layer 2 on top of the crushed fiber material.
[0058] S3. Under the drive of a driving force (such as hydraulic pressure), the moving die 4 and the fixed die 3 in S2 are closed. After the molding die performs molding and holds pressure for a set time, a composite bamboo and wood fiber molded tray is produced in the molded tray cavity.
[0059] The crushed fiber material is mixed with an adhesive. After the holding pressure time, the crushed fiber material and the impregnated profiling layer 2 finally produce a composite bamboo and wood fiber molded tray.
[0060] S4. Under the drive of a driving force, the moving die 4 and the fixed die 3 in S3 are opened. Use a suction cup manipulator to hold the composite bamboo and wood fiber molded tray and transfer it outside the molding die, that is, the manufacturing is completed.
[0061] In this step, since the surface roughness of the outer layer of the impregnated profiling layer 2 is small, the suction cup manipulator can stably hold the composite bamboo and wood fiber compression molding tray.
[0062] To improve the mold processing efficiency, there are two moving molds 4, and the fixed mold 3 is located between the two moving molds 4. That is, the fixed mold 3 is in the middle position between the two moving molds 4. After each moving mold 4 is combined with the fixed mold 3 respectively, a compression molding tray cavity is formed. Each moving mold 4 is respectively coordinated with the hydraulic power.
[0063] When two moving molds 4 are selected, the two moving molds 4 move alternately relative to the fixed mold 3. That is, when the mold closing operation is carried out in a certain compression molding tray g cavity, fiber materials can be added into another compression molding tray cavity. At this time, compression molding and adding fiber materials can be carried out synchronously, so as to greatly improve the production efficiency.
[0064] When two moving molds 4 are selected, the upper surface of the fixed mold 3 is provided with a first cavity. One moving mold 4 above the fixed mold 3 is a convex mold. At this time, when the two are combined, a compression molding tray cavity is obtained; the other moving mold 4 below the fixed mold 3 is a concave mold. The concave mold has a second cavity, and when the lower surface of the fixed mold 3 and the second cavity are combined, another compression molding tray cavity is obtained. Embodiment III
[0065] The structure and principle of this embodiment are basically the same as those of Embodiment I. The different structure lies in that a molded fiber honeycomb plate body is selected. The molded fiber honeycomb plate body has a number of formed depressions 10 and forms a concave honeycomb structure on the upper surface, and a convex honeycomb structure corresponding to the formed depressions 10.
[0066] The convex honeycomb structure covers at least 1 / 2 of the surface area of the other surface of the molded fiber plate body 1. The large-area coverage of the convex honeycomb structure can increase the stiffness and strength of the molded fiber plate body 1, make the tray more durable and reliable, and at the same time can also increase the friction force.
[0067] The stacked honeycomb structure with concave-convex structure can effectively reduce the transportation cost. At the same time, the honeycomb structure with concave-convex structure can make the tray lighter and meet the strength requirements.
[0068] Such as Figures 4 - 5 As shown, the wall thickness 11S of the whole fiber plate body during the compression molding process is consistent with the plate thickness 1S, thereby improving the overall quality and stability of the product. In addition, the consistent wall thickness can also ensure the structural strength and stability of the product, make the product more durable and have properties such as compression resistance and bending resistance.
[0069] The convex honeycomb structure is a number of formed protrusions 11, and the formed protrusions 11 correspond to the formed depressions 10 one by one.
[0070] The formed recess 10 and the formed protrusion 11 are integrally formed, which can ensure the consistency of the strength (in the thickness direction) of the composite bamboo and wood fiber molded tray. The formed recess 10 is any one or a combination of oval, circular, and polygonal configurations.
[0071] In this embodiment, the formed recess 10 is in the form of a combination of a honeycomb-shaped hexagon and a special shape. The advantage of the honeycomb shape is that it has high structural strength and stiffness, can withstand large external loads, and improves the impact resistance and load-bearing capacity of the product.
[0072] The bottom surface of the formed recess 10 is an arc-shaped concave surface 100, and the formed protrusion 11 has an arc-shaped convex surface 110 whose center coincides with the center of the arc-shaped concave surface 100.
[0073] The arc-shaped concave surface 100 is formed by a spherical convex surface, which further strengthens the strength of the honeycomb walls between two adjacent formed recesses 10. Moreover, on the premise of using the same amount of materials as the conventional molded pallet and meeting the use strength, the thickness of the molded tray can be greatly reduced while maintaining the uniform board density of the molded tray. The simultaneous formation of several formed recesses 10 and formed protrusions 11 can ensure the consistency of the strength (in the thickness direction) of the composite bamboo and wood fiber molded tray.
[0074] The opening of the formed recess 10 and the other surface of the molded fiber board body 1 are connected by an arc chamfer surface 101.
[0075] The design of the arc chamfer surface 101 can reduce stress concentration, reduce the possibility of initial cracks, and improve the tensile and shear resistance of the connection part. The arc-shaped concave surface 100 and the arc chamfer surface 101 are connected by a draft arc-shaped concave surface 102. The connection design through the draft arc-shaped concave surface 102 can reduce stress concentration, disperse the action of the applied force, reduce wear and damage of the stressed part, and extend the service life of the product; in addition, the design of the draft arc-shaped concave surface 102 can reduce sharp edges and corners, reduce the risk of injury, and improve the safety of the product.
[0076] At least two adjacent formed recesses 10 are spaced apart. When the formed recesses 10 are spaced apart, the loads and stresses externally applied to the pallet can be effectively dispersed, avoiding local stress concentration, reducing the possibility of deformation and damage of the product. This design can improve the overall force balance of the pallet, increase the load-bearing capacity and durability of the product, and extend the service life of the product.
[0077] Taking any pair of half-division lines 12 of the molded fiber board body 1 as the boundary, the 1 / 2 formed recesses 10 provided on the molded fiber board body 1 and the remaining 1 / 2 formed recesses 10 are symmetrically distributed with respect to the half-division line 12.
[0078] As Figure 3As shown, in this embodiment, the formed recess 10 covers at least 1 / 2 of the surface area of the molded fiberboard body 1, and reserved portions 13 are respectively provided in the four corner regions of the molded fiberboard body 1.
[0079] The symmetrically distributed formed recesses 10 can make the tray more balanced in force during use and prevent excessive force on some areas, thus affecting the use effect. The protruding height of the formed protrusion 11 protruding from the other surface of the molded fiberboard body 1 is less than the plate thickness of the molded fiberboard body 1. The design of the formed protrusion 11 with a height less than the plate thickness 1S can ensure the overall flatness of the product, avoid uneven pressure distribution and deformation caused by too high protrusions, and can also reduce the possibility of deformation and breakage of the tray during manufacturing or use. Too high formed protrusions 11 are likely to cause stress concentration and structural instability, resulting in a decrease in product strength and an increase in fragility.
[0080] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A composite bamboo-wood fiber molded pallet, comprising a molded fiberboard body (1) obtained by molding bamboo and / or wood pulverized fiber material, characterized in that: An impregnated contour layer (2) is composited on the upper surface and / or lower surface of the molded fiberboard body (1), and the impregnated contour layer (2) is integrally connected to the molded fiberboard body (1) when the molded fiberboard body (1) is molded.
2. The composite bamboo fiber molded pallet according to claim 1, characterized in that: The fiber material is mixed with glue and / or a surface of the impregnated contour layer (2) close to the molded fiberboard body (1) is provided with glue, and the impregnated contour layer (2) and the molded fiberboard body (1) are connected by glue.
3. The composite bamboo fiber molded pallet according to claim 1, characterized in that: The molded fiber board body (1) is any one of a molded fiber honeycomb board body and a molded fiber support board.
4. The composite bamboo fiber molded pallet according to claim 1, characterized in that: The impregnated contour layer (2) is impregnated kraft paper or impregnated plastic film.
5. The composite bamboo fiber molded pallet according to claim 1, characterized in that: An impregnated profiling layer (2) is respectively compounded on the upper surface and the lower surface of the molded fiberboard body (1), wherein the impregnated profiling layer (2) is defined as an upper impregnated profiling layer (20) and a lower impregnated profiling layer (21), and the material of the upper impregnated profiling layer (20) is the same as or different from the material of the lower impregnated profiling layer (21).
6. The composite bamboo fiber molded pallet according to claim 5, characterized in that: A plurality of pressure relief through holes (210) distributed in an array are provided on the upper impregnated contour layer (20) and / or the lower impregnated contour layer (21).
7. The composite bamboo fiber molded pallet according to claim 1, characterized in that: The surface roughness of the impregnated contoured layer (2) is less than the roughness of the upper surface or the lower surface of the molded fiberboard body (1).
8. The molding die of the composite bamboo-wood fiber molded pallet is characterized by: The molding die is used for molding the composite bamboo-wood fiber molded pallet as described in any one of claims 1-7.
9. The molding die for the composite bamboo-wood fiber molded pallet according to claim 8, characterized in that: The molding die comprises a fixed die (3) and at least one movable die (4) which moves in a vertical direction relative to the fixed die (3); the movable die (4) and the fixed die (3) are combined to form at least one molding tray cavity.
10. The molding die for the composite bamboo-wood fiber molded pallet according to claim 9, characterized in that: There are two movable molds (4), and the fixed mold (3) is located between the two movable molds (4). Each movable mold (4) is molded together with the fixed mold (3) to form a molded tray cavity.