A container floor and a manufacturing method thereof

Abstract

The present invention discloses a container floorboard, which comprises a bamboo layer, a hardwood layer, an impact-resistant layer and a sandwich core; the hardwood layer and the bamboo layer are arranged opposite to each other and form a plurality of cavities evenly distributed along the length direction, and the cavities are arranged horizontally, and the sandwich core is filled in the cavities to form a floorboard main body; the impact-resistant layer is coated outside the floorboard main body. The present invention can reduce the self-weight of the container floorboard on the premise of ensuring the performance of the container floorboard.

Description

Technical Field

[0001] The present invention relates to the technical field of container production, and in particular to a container bottom plate and a manufacturing method thereof. Background Art

[0002] Existing container bottom plates can be divided into three types according to the material. One is a pure hardwood bottom plate made of tropical hardwood. Such a bottom plate has good insect resistance, moisture resistance and corrosion resistance. However, the raw materials of such a bottom plate come from Southeast Asia, so its cost is relatively high, and its self-weight is large, resulting in a large overall weight of the container. The second is a hybrid bottom plate, which is formed by gluing tropical hardwood and other plates. Although its performance is similar to that of the above bottom plate, a large amount of glue is required, and the environmental protection coefficient is low. The third is a bamboo bottom plate, which has the characteristic of wear resistance, but its corrosion resistance is weaker than that of the pure hardwood bottom plate. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a container bottom plate and a manufacturing method thereof, which can reduce the weight of the container bottom plate on the premise of ensuring that the performance of the bottom plate does not decline.

[0004] In order to solve the above technical problem, the technical solution adopted by the present invention is:

[0005] A container bottom plate includes a bamboo layer, a hardwood layer, an impact-resistant layer and a sandwich core;

[0006] The hardwood layer and the bamboo layer are arranged oppositely and form a plurality of cavities evenly distributed along the length direction, and the cavities are arranged horizontally. The sandwich core is filled in the cavities to form a bottom plate main body;

[0007] The impact-resistant layer is coated outside the bottom plate main body.

[0008] In order to solve the above technical problem, another technical solution adopted by the present invention is:

[0009] A manufacturing method of a container bottom plate for producing a container bottom plate includes the following steps:

[0010] S1: Rolling and flattening bamboo and then performing hot pressing and shaping to obtain bamboo slices;

[0011] S2: High-temperature pressing two bamboo slices together to obtain a bamboo board;

[0012] S3: Cutting the bamboo board to form an accommodation groove for accommodating the sandwich core and a first dovetail groove or a first dovetail tenon for splicing with the hardwood layer, to obtain a bamboo layer;

[0013] S4: Cutting the wooden board to form a second dovetail tenon or a second dovetail groove on the surface of the wooden board, which is matched with the dovetail groove or dovetail tenon in S3, to obtain a hardwood layer;

[0014] S5: After placing the sandwich core into the accommodation groove, slide and splice the bamboo layer in S3 and the hardwood layer in S4 to form the main body of the bottom plate.

[0015] S6: Place the main body of the bottom plate into a mold filled with impact-resistant material, and after the impact-resistant material completely wraps around the outside of the bottom plate and cures, demold it.

[0016] Wherein, the ratio of the thickness of the accommodation groove to the thickness of the bamboo board is 1:2 to 1:4; there are two accommodation grooves, and the two accommodation grooves are arranged along the width direction of the bamboo layer; the wood board is tropical hardwood.

[0017] Wherein, the impact-resistant material includes the following components:

[0018] 50 - 80 parts of epoxy resin, 50 - 80 parts of curing agent, 20 - 30 parts of polysulfide rubber, and 5 - 10 parts of filler; the curing agent is a polyamide-based curing agent; the filler is at least one of quartz powder, glass fiber, asbestos fiber, and iron powder.

[0019] Wherein, S1 and S2 are hot-pressed using a hot-pressing device; the hot-pressing device includes a liquid tank, a plurality of hydraulic push rods, and a hot pressing plate; the hot pressing plate includes a central pressing plate in the middle and annular pressing plates sequentially sleeved outside the central pressing plate; the central pressing plate and the annular pressing plates can slide up and down and be misaligned relative to each other; the hydraulic push rods are arrayed above the central pressing plate and the annular pressing plates respectively to push the central pressing plate and the annular pressing plates down; the upper part of the liquid tank is in the shape of a hollow cylinder, and the lower end is in the shape of a bowl; a main piston is hermetically and slidably sleeved in the liquid tank; the main piston divides the liquid tank into an upper liquid chamber and a lower liquid chamber up and down; the upper liquid chamber is filled with water and is provided with an electrode pair; the electrode pair can controllably discharge to act on the water in the upper liquid chamber to generate a liquid-electric effect; the lower liquid chamber is filled with hydraulic oil; one end of multiple liquid guide pipes communicates with the lower liquid chamber through the bowl-shaped part at the lower end of the liquid tank, and the other end communicates with the hydraulic push rods.

[0020] Wherein, the hydraulic push rod includes a hollow cylindrical cylinder body and a rod body that is hermetically and slidably sleeved at the upper end inside the hollow cylindrical cylinder body, and the lower end extends out of the cylinder body and is fixedly connected to the central pressing plate or the annular pressing plate; a guiding cavity is enclosed between the upper end of the rod body and the cylinder body; a sub-piston is hermetically and slidably sleeved in the guiding cavity; electromagnets that can control the magnetic force size and have the same poles on the opposite surfaces are respectively fixed on the opposite surfaces of the sub-piston and the rod body; the sub-piston divides the guiding cavity into an upper liquid pushing chamber and a lower magnetic pushing chamber.

[0021] Wherein, the rod body is guided to slide vertically up and down through a fixedly arranged guiding sleeve.

[0022] Wherein, heating wires are embedded in the central pressing plate and the annular pressing plates; the central pressing plate and the annular pressing plates are heat-conducting rigid bodies.

[0023] Among them, the liquid tank is located above the center of the hot pressing plate and is connected to the hydraulic push rod through multiple liquid guide pipes; the length of the liquid guide pipe is the straight-line distance from the bottom of the liquid tank to the top of the hydraulic push rod; a spring is connected between the main piston and the liquid tank for resetting the main piston.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention adopts the method of splicing bamboo and wood to form multiple cavities for accommodating the sandwich core. On the premise of ensuring the hardness of the bottom plate main body, the self-weight of the bottom plate main body is reduced. At the same time, an impact-resistant layer is coated on the outside of the bottom plate main body to further improve the hardness, corrosion resistance and impact resistance of the container bottom plate. The present invention can reduce the self-weight of the bottom plate on the premise of ensuring that the performance of the bottom plate does not decline.

[0026] 2. The hot pressing plate of the hot pressing device of the present invention adopts a multi-layer sleeve structure, which is independently pushed by different hydraulic push rods. Combined with the same pressure transmitted by the hydraulic oil in the lower liquid cavity, and then skillfully combined with the repulsive force between the controllable electromagnets, the controllable step-by-step hot pressing from the inside to the outside of the container bottom plate to be hot pressed is realized. The relay hot pressing method can make part of the deformation amount generated by the container bottom plate during the hot pressing process move horizontally from the center to the outside, thereby improving the thickness accuracy of the container bottom plate after hot pressing, and reducing the problem of large internal stress after hot pressing. The formed container bottom plate has a more stable shape, is not easy to bend and deform, and the size is not easy to repeat; and problems such as fracture or internal cracks are not easy to occur.

[0027] 3. The present invention utilizes the characteristic that the electromagnet can simply control the magnetic force by the magnitude of the current. Under the condition of ensuring the same final pressure, the release speed of the pressure of each layer of pressing plate and the delay time of complete release are controlled, so that the direction and magnitude of the material flow of the container bottom plate under hot pressing can be controlled to a certain extent, and this process is smooth and stepless, and there will be no sudden or cliff-like pressure changes; ensuring the order, accuracy and efficiency of the hot pressing process of the container bottom plate.

[0028] 4. The sleeve structure of the present invention cleverly plays the role of non-stop retraction, can stabilize the position of the main piston, and can maintain the pressure of the hydraulic oil in the lower liquid cavity and the upper liquid push cavity infinitely, so as to realize the pressure holding during the hot pressing process; and simply by controlling the solenoid valve, the return of the main piston and the position reset of each component of the hot pressing device can be realized, and the accurate activities of the next hot pressing can be completed automatically and quickly. Description of the Drawings

[0029] Figure 1 It is a cross-sectional view of the container bottom plate in the present invention;

[0030] Figure 2This is a schematic structural diagram of the hot pressing device in the normal state of the present invention;

[0031] Figure 3 This is a schematic structural diagram of the hot pressing device during hot pressing in the present invention;

[0032] Figure 4 This is a schematic diagram of the hot pressing plate and the hydraulic push rod in the present invention.

[0033] Label description:

[0034] 1. Bamboo layer; 11. Accommodating groove; 12. First dovetail groove; 2. Wood layer; 21. Second dovetail tenon; 3. Bottom plate main body; 30. Cavity; 4. Impact resistance layer; 5. Sandwich core; 6. Hot pressing device; 61. Liquid tank; 610. Connecting pipe; 611. Main piston; 612. Upper liquid cavity; 613. Lower liquid cavity; 614. Electrode pair; 615. Sleeve; 616. Outer annular cavity; 617. Inner cylindrical cavity; 618. Top liquid cavity; 619. Check valve; 620. Solenoid valve; 62. Hydraulic push rod; 621. Cylinder body; 622. Rod body; 624. Sub-piston; 625. Electromagnet; 626. Upper liquid push cavity; 627. Lower magnetic push cavity; 631. Central pressing plate; 632. Annular pressing plate; 64. Liquid guiding pipe; 65. Spring; 66. Guide sleeve. Specific implementation manner

[0035] To describe in detail the technical content, achieved purpose and effects of the present invention, the following is described in conjunction with the implementation manners and with reference to the drawings.

[0036] Refer to Figure 1 Embodiment 1 of the present invention is as follows:

[0037] A container bottom plate includes a bamboo layer 1, a hardwood layer 2, an impact resistance layer 4 and a sandwich core 5; the hardwood layer 2 and the bamboo layer 1 are arranged opposite to each other and form a plurality of cavities 30 evenly distributed along the length direction, and the cavities 30 are arranged horizontally, and the sandwich core 5 is filled in the cavities 30 to form the bottom plate main body 3; the impact resistance layer 4 is coated outside the bottom plate main body 3. Preferably, the hardwood layer 2 and the bamboo layer 1 are spliced by dovetail grooves and dovetail tenons. Preferably, the sandwich core 5 is a honeycomb board.

[0038] Embodiment 2 of the present invention is as follows:

[0039] On the basis of Embodiment 1, a manufacturing method of a container bottom plate is adopted for producing a container bottom plate, including the following steps:

[0040] S1: Roll and flatten the bamboo and then perform hot pressing and shaping to obtain bamboo slices;

[0041] S2: Hot press and bond two bamboo slices at high temperature to obtain a bamboo board;

[0042] S3: Cut the bamboo board to form a receiving groove 11 for accommodating the sandwich core 5 and a first dovetail groove 12 or a first dovetail tenon for splicing with the hardwood layer 2, obtaining the bamboo material layer 1;

[0043] S4: Cut the wooden board to form a second dovetail tenon 21 or a second dovetail groove on the surface of the wooden board, which matches the first dovetail groove 12 or the first dovetail tenon in S3, obtaining the hardwood layer 2;

[0044] S5: After placing the sandwich core 5 into the receiving groove 11, slidably splice the bamboo material layer 1 in S3 and the hardwood layer 2 in S4 to form the bottom plate main body 3;

[0045] S6: Place the bottom plate main body 3 into a mold filled with anti-impact material, so that the anti-impact material completely wraps around the outside of the bottom plate and cures, then demold.

[0046] To improve the bearing capacity of the bamboo board, preferably, the ratio of the thickness of the receiving groove 11 to the thickness of the bamboo board is 1:3.

[0047] In this embodiment, two receiving grooves 11 are provided, and the two receiving grooves 11 are arranged along the width direction of the bamboo material layer 1. The two receiving grooves 11 are provided to form transverse and longitudinal support beams on the bamboo material layer 1, thereby improving the bearing capacity of the container bottom plate in the thickness direction.

[0048] Preferably, the wooden board is tropical hardwood.

[0049] In this embodiment, the anti-impact material includes the following components:

[0050] 50 parts of epoxy resin, 50 parts of curing agent, 20 parts of polysulfide rubber and 5 parts of filler. Preferably, the curing agent is a polyamide-based curing agent. Optionally, the filler is at least one of quartz powder, glass fiber, asbestos fiber, and iron powder. In this embodiment, an anti-impact layer with good anti-impact performance is formed outside the bottom plate body through epoxy resin, curing agent and polysulfide rubber, improving the anti-impact performance and hardness of the container bottom plate.

[0051] Embodiment 3 of the present invention is as follows:

[0052] Based on Embodiment 1, a manufacturing method for a container bottom plate is adopted for producing a container bottom plate, including the following steps:

[0053] S1: Roll and flatten the bamboo material and then perform hot pressing and shaping to obtain bamboo slices;

[0054] S2: Press two bamboo slices at high temperature to obtain a bamboo board;

[0055] S3: Cut the bamboo board to form a receiving groove 11 for accommodating the sandwich core 5 and a first dovetail groove 12 or a first dovetail tenon for splicing with the hardwood layer 2, obtaining the bamboo material layer 1;

[0056] S4: Cut the wooden board to form a second dovetail tenon 21 or a second dovetail groove on the surface of the wooden board that matches the first dovetail groove 12 or the first dovetail tenon in S3, obtaining the hardwood layer 2;

[0057] S5: After placing the sandwich core 5 into the accommodation groove 11, slidably splice the bamboo layer 1 in S3 and the hardwood layer 2 in S4 to form the bottom plate main body 3;

[0058] S6: Place the bottom plate main body 3 into a mold filled with impact-resistant material, and after the impact-resistant material completely wraps around the outside of the bottom plate and cures, demold.

[0059] Preferably, the ratio of the thickness of the accommodation groove 11 to the thickness of the bamboo board is 1:3.

[0060] In this embodiment, two accommodation grooves 11 are provided, and the two accommodation grooves 11 are arranged along the width direction of the bamboo layer 1.

[0061] Preferably, the wooden board is tropical hardwood.

[0062] In this embodiment, the impact-resistant material includes the following components:

[0063] 70 parts of epoxy resin, 70 parts of curing agent, 25 parts of polysulfide rubber, and 7 parts of filler. Preferably, the curing agent is a polyamide curing agent. Optionally, the filler is at least one of quartz powder, glass fiber, asbestos fiber, and iron powder.

[0064] Embodiment 4 of the present invention is as follows:

[0065] On the basis of Embodiment 1, a manufacturing method for a container bottom plate is adopted for producing a container bottom plate, including the following steps:

[0066] S1: Roll and flatten the bamboo material and then perform hot pressing and shaping to obtain bamboo slices;

[0067] S2: Press two bamboo slices at high temperature to obtain a bamboo board;

[0068] S3: Cut the bamboo board to form an accommodation groove 11 for accommodating the sandwich core 5 and a first dovetail groove 12 or a first dovetail tenon for splicing with the hardwood layer 2, obtaining the bamboo layer 1;

[0069] S4: Cut the wooden board to form a second dovetail tenon 21 or a second dovetail groove on the surface of the wooden board that matches the first dovetail groove 12 or the first dovetail tenon in S3, obtaining the hardwood layer 2;

[0070] S5: After placing the sandwich core 5 into the accommodation groove 11, slidably splice the bamboo layer 1 in S3 and the hardwood layer 2 in S4 to form the bottom plate main body 3;

[0071] S6: Place the main body 3 of the base plate into a mold filled with impact-resistant material, so that the impact-resistant material completely wraps around the outside of the base plate and after curing, demold it.

[0072] Preferably, the ratio of the thickness of the accommodating groove 11 to the thickness of the bamboo board is 1:3.

[0073] In this embodiment, two accommodating grooves 11 are provided, and the two accommodating grooves 11 are arranged along the width direction of the bamboo layer 1.

[0074] Preferably, the wooden board is tropical hardwood.

[0075] In this embodiment, the impact-resistant material includes the following components:

[0076] 80 parts of epoxy resin, 80 parts of curing agent, 30 parts of polysulfide rubber and 10 parts of filler. Preferably, the curing agent is a polyamide-based curing agent. Optionally, the filler is at least one of quartz powder, glass fiber, asbestos fiber, iron powder.

[0077] In addition, referring to Figures 2 to 4 , on the basis of the above embodiments, S1 and S2 are hot-pressed by a hot-pressing device; the hot-pressing device 6 includes a liquid tank 61, a plurality of hydraulic push rods 62 and a hot pressing plate; the hot pressing plate includes a central pressing plate 631 located in the middle and an annular pressing plate 632 sequentially sleeved outside the central pressing plate 631; between the central pressing plate 631 and the annular pressing plate 632 and between adjacent two annular pressing plates 632 can slide up and down and be misaligned; the hydraulic push rods 62 are arrayed above the central pressing plate 631 and the annular pressing plate 632 respectively to push the central pressing plate 631 and the annular pressing plate 632 to press down; the upper part of the liquid tank 61 is hollow cylindrical, and the lower end is bowl-shaped; a main piston 611 is hermetically sleeved and slidably arranged in the liquid tank 61; the main piston 611 divides the liquid tank 61 into an upper liquid chamber 612 and a lower liquid chamber 613 up and down; the upper liquid chamber 612 is filled with water, and an electrode pair 614 is provided; the electrode pair 614 can be controlled to discharge to act on the water in the upper liquid chamber 612 to generate a liquid-electric effect; the lower liquid chamber 613 is filled with hydraulic oil; one end of multiple liquid guide pipes 64 is communicated with the lower liquid chamber 613 through the bowl-shaped part at the lower end of the liquid tank 61, and the other end is communicated with the hydraulic push rods 62.

[0078] Further, the hydraulic push rod 62 includes a hollow cylindrical cylinder body 621 and a rod body 622 whose upper end is hermetically sleeved and slidably arranged in the hollow cylindrical cylinder body 621, and the lower end extends out of the cylinder body 621 and is fixedly connected to the central pressing plate 631 or the annular pressing plate 632; a guide force chamber is enclosed between the upper end of the rod body 622 and the cylinder body 621; a sub-piston 624 is hermetically sleeved and slidably arranged in the guide force chamber; electromagnets 625 with controllable magnetic force and the same polar opposite faces are respectively fixed on the opposite faces of the sub-piston 624 and the rod body 622; the sub-piston 624 divides the guide force chamber into an upper liquid pushing chamber 626 and a lower magnetic pushing chamber 627.

[0079] Further, the rod body 622 is guided by a fixedly arranged guiding sleeve 66 to slide vertically up and down.

[0080] Further, heating wires are embedded in the central pressing plate 631 and the annular pressing plate 632; the central pressing plate 631 and the annular pressing plate 632 are heat-conducting rigid bodies.

[0081] Further, the liquid tank 61 is located above the center of the hot pressing plate and is connected to the hydraulic push rod 62 through a plurality of liquid guide pipes 64; the length of the liquid guide pipe 64 is the straight-line distance from the bottom of the liquid tank 61 to the top of the hydraulic push rod 62; a spring 65 is connected between the main piston 611 and the liquid tank 61 for resetting the main piston 611.

[0082] Furthermore, a sealable and telescopic sleeve 615 is arranged in the upper liquid cavity 612; the upper end of the sleeve 615 is fixedly connected to the top of the upper liquid cavity 612, and the lower end is fixedly connected to the main piston 611, and the upper liquid cavity 612 is hermetically divided into an inner cylindrical cavity 617 and an outer annular cavity 616; the electrode pair 614 is arranged in the inner cylindrical cavity 617; a top liquid cavity 618 is arranged above the upper liquid cavity 612; the outer annular cavity 616 is communicated with the top liquid cavity 618 through a plurality of one-way valves 619, so that the hydraulic oil in the top liquid cavity 618 can enter the outer annular cavity 616 unidirectionally through the one-way valves 619; a communicating pipe 610 is also connected between the outer annular cavity 616 and the top liquid cavity 618; a solenoid valve 620 is arranged on the communicating pipe 610.

[0083] For the preparation process of the container bottom plate, the hot pressing method is as follows:

[0084] ① Place the bamboo slices to be hot pressed in the bottom mold, and control the electrode pair 614 to generate a high-intensity electric field through the controller. The high-intensity electric field generates a liquid-electric effect in the water in the inner cylindrical cavity 617, and the generated impact force pushes the main piston 611 to move downward, squeezing the hydraulic oil in the lower liquid cavity 613;

[0085] ② The squeezed hydraulic oil enters the upper liquid pushing cavity 626 through the liquid guide pipe 64, and pushes the sub-piston 624 to move downward;

[0086] ③Due to the repulsive force between the sub-piston 624 and the electromagnet 625 on the rod body 622, as the sub-piston 624 continuously approaches the upper end of the rod body 622, the repulsive force becomes greater. Until the two touch or the repulsive force is greater than the pressure of the hydraulic oil acting on the sub-piston 624, the rod body 622 completely receives the hydraulic pressure and transmits this pressure to the container bottom plate to be formed through the central pressing plate 631 and the annular pressing plate 632; and the magnitude of the repulsive force between the two electromagnets 625 determines the distance that the sub-piston 624 and the rod body 622 can approach and the time when the rod body 622 completely receives the hydraulic pressure. The controller controls the magnetic force magnitude of each electromagnet 625 according to the design requirements. From the central pressing plate 631 outwards, the repulsive force gradually decreases, so that the central pressing plate 631 first presses the bamboo slices, and then from the inside outwards, the remaining annular pressing plates 632 press the bamboo slices in turn;

[0087] ④While step ① is being carried out, during the downward movement of the main piston 611, the sleeve 615 is stretched downwards, increasing the volume of the outer annular cavity 616 and generating a negative pressure. Hydraulic oil is sucked from the top liquid cavity 618 through the one-way valve 619 for filling; due to the existence of the one-way valve 619, the sucked hydraulic oil cannot drain away by itself, thus stabilizing the position of the main piston 611 and being able to maintain the pressure of the hydraulic oil in the lower liquid cavity 613 and the upper liquid pushing cavity 626 infinitely, thereby realizing the pressure holding during the hot pressing process;

[0088] ⑤After the hot pressing is completed, the solenoid valve 620 is opened through the controller. Under the combined action of the restoring force of the container bottom plate, the restoring force of the spring 65, and the negative pressure in the inner cylindrical cavity 617, the main piston 611 moves upwards and returns, and squeezes the hydraulic oil in the outer annular cavity 616 back into the top liquid cavity 618 through the connecting pipe 610 until all components of the hot pressing device return to the initial position.

[0089] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A container bottom plate, characterized in that, It includes a bamboo layer, a hardwood layer, an impact-resistant layer and a sandwich core; The hardwood layer and the bamboo layer are oppositely arranged and form a plurality of cavities evenly distributed along the length direction, and the cavities are arranged horizontally. The sandwich core is filled in the cavities to form the main body of the bottom plate; The impact-resistant layer is coated outside the main body of the bottom plate; The manufacturing method of the container bottom plate includes the following steps: S1: Roll and flatten the bamboo and then perform hot pressing and shaping to obtain bamboo slices; S2: High-temperature press two bamboo slices together to obtain a bamboo board; S3: Cut the bamboo board to form an accommodation groove for accommodating the sandwich core and a first dovetail groove or a first dovetail tenon for splicing with the hardwood layer, so as to obtain the bamboo layer; S4: Cut the wooden board to form a second dovetail tenon or a second dovetail groove on the surface of the wooden board, which matches the dovetail groove or dovetail tenon in S3, so as to obtain the hardwood layer; S5: After placing the sandwich core into the accommodation groove, slidably splice the bamboo layer in S3 and the hardwood layer in S4 to form the main body of the bottom plate; S6: Place the main body of the bottom plate into a mold filled with impact-resistant material, so that the impact-resistant material completely coats the outside of the bottom plate and cures, and then demold; S1 and S2 are hot-pressed by a hot-pressing device. The hot-pressing device (6) includes a liquid tank (61), a plurality of hydraulic push rods (62) and a hot pressing plate. The hot pressing plate includes a central pressing plate (631) located in the middle and annular pressing plates (632) sequentially sleeved outside the central pressing plate (631). Between the central pressing plate (631) and the annular pressing plates (632) and between adjacent two annular pressing plates (632), they can slide up and down and be displaced. The hydraulic push rods (62) are respectively arrayed above the central pressing plate (631) and the annular pressing plates (632) to push the central pressing plate (631) and the annular pressing plates (632) to press down. The upper part of the liquid tank (61) is in the shape of a hollow cylinder, and the lower end is in the shape of a bowl. A main piston (611) is hermetically and slidably sleeved in the liquid tank (61). The main piston (611) divides the liquid tank (61) into an upper liquid chamber (612) and a lower liquid chamber (613) up and down. The upper liquid chamber (612) is filled with water and is provided with an electrode pair (614). The electrode pair (614) can be controlled to discharge and act on the water in the upper liquid chamber (612) to generate a liquid-electric effect. The lower liquid chamber (613) is filled with hydraulic oil. One ends of multiple liquid guide pipes (64) communicate with the lower liquid chamber (613) through the bowl-shaped part at the lower end of the liquid tank (61), and the other ends communicate with the hydraulic push rods (62).

2. A container floor according to claim 1, wherein, The hardwood layer and the bamboo layer are spliced by dovetail grooves and dovetail tenons; the sandwich core is a honeycomb board.

3. The manufacturing method of a container bottom plate according to claim 1, characterized in that, The thickness ratio of the accommodation groove to the thickness of the bamboo board is 1:2 to 1:

4. There are two accommodation grooves, and the two accommodation grooves are arranged along the width direction of the bamboo layer. The wooden board is tropical hardwood.

4. The manufacturing method of a container floor according to claim 1, characterized in that, The impact-resistant material includes the following components: 50-80 parts of epoxy resin, 50-80 parts of curing agent, 20-30 parts of polysulfide rubber and 5-10 parts of filler; the curing agent is a polyamide curing agent; the filler is at least one of quartz powder, glass fiber, asbestos fiber and iron powder.

5. The manufacturing method of a container floor according to claim 1, characterized in that The hydraulic push rod (62) includes a hollow cylindrical cylinder block (621), and a rod body (622) with its upper end hermetically and slidably sleeved inside the hollow cylindrical cylinder block (621), and its lower end extending out of the cylinder block (621) and fixedly connected to the central pressing plate (631) or the annular pressing plate (632); a force guiding cavity is defined by enclosing the upper end of the rod body (622) and the cylinder block (621); a sub-piston (624) is hermetically and slidably sleeved inside the force guiding cavity; electromagnets (625) which can control the magnetic force magnitude and have the same polarities on the opposite faces are respectively fixed on the opposite faces of the sub-piston (624) and the rod body (622); the sub-piston (624) divides the force guiding cavity into an upper hydraulic push cavity (626) and a lower magnetic push cavity (627).

6. The manufacturing method of a container bottom plate according to claim 5, characterized in that, The rod body (622) is guided to slide vertically up and down through a fixedly arranged guiding sleeve (66).

7. The manufacturing method of a container bottom plate according to claim 6, characterized in that, The central pressing plate (631) and the annular pressing plate (632) are embedded with heating wires; the central pressing plate (631) and the annular pressing plate (632) are heat-conducting rigid bodies.

8. A manufacturing method of a container bottom plate according to claim 7, characterized in that, The liquid tank (61) is located above the center of the hot pressing plate and is connected to the hydraulic push rod (62) through a plurality of liquid guiding pipes (64); the length of the liquid guiding pipe (64) is the straight-line distance from the bottom of the liquid tank (61) to the top of the hydraulic push rod (62); a spring (65) is connected between the main piston (611) and the liquid tank (61) for resetting the main piston (611).

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