Auxiliary foaming device, foamed sheet and foaming method

Abstract

The application provides an auxiliary foaming device, a foamed plate and a foaming method. The auxiliary foaming device comprises a main flow guide part and branch flow guide parts. The main flow guide part is used for being connected with a material injection gun. The main flow guide part is provided with a main flow guide groove. The branch flow guide parts are at least two. The at least two branch flow guide parts are connected with the main flow guide part and extend towards different directions. The branch flow guide parts are provided with branch flow guide grooves. The branch flow guide grooves are communicated with the main flow guide groove to form flow guide grooves. The falling points of foaming materials sprayed by one high-pressure foaming machine are changed from one to multiple through the branch flow guide parts. The foaming materials can fully and quickly cover each corner of a cavity of a container to be filled, and the uniformity and integrity of filling are ensured. The main flow guide part and the branch flow guide parts adopt flow guide grooves, the resistance of fluid is reduced, the conveying speed is accelerated, and the fluidity and transmission efficiency of the fluid are improved.

Description

Technical Field

[0001] This application relates to the field of container technology, and more specifically to an auxiliary foaming device, foaming board, and foaming method. Background Technology

[0002] Refrigerated containers play a vital role in the cold chain logistics industry as an important multimodal transport tool. A refrigerated container consists of a refrigeration unit and an insulated refrigerated box. The refrigeration unit provides a continuous supply of cooling energy to the container, while the insulated refrigerated box provides insulation.

[0003] Common insulation for refrigerated containers typically uses rigid polyurethane foam. The industry often employs a multi-stage foaming process, where the various sides of the refrigerated container are sandwiched and foamed in a closed mold before assembly. Because the sides of refrigerated containers are relatively large, the foam filling process often requires the foam material to have good flowability and a long flow distance. To achieve this, the reaction speed of the foam material must be slow. Simultaneous injection using multiple nozzles can easily lead to excessively high filling rates, wasting resources, and the large number of nozzles increases equipment investment and operating costs.

[0004] Therefore, there is a need to provide an auxiliary foaming device, foaming board, and foaming method to at least partially solve the above problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, a first aspect of this application provides an auxiliary foaming device, comprising:

[0007] A main flow section is provided, which is used to connect with the injection gun and has a main flow groove.

[0008] At least two branch flow guides are provided, and at least two of the branch flow guides are connected to the main flow guide and extend in different directions. The branch flow guides are provided with branch flow guide grooves, wherein the branch flow guide grooves are connected to the main flow grooves to form flow guide grooves.

[0009] According to the auxiliary foaming device of the first aspect of this application, the foaming material sprayed from a high-pressure foaming machine is redirected from one point to multiple points via a branch guide section. This allows the foaming material to fully and quickly cover all corners of the container's filling cavity, ensuring uniformity and integrity of the filling. The main flow section and the branch guide section employ guide channels to reduce fluid resistance, accelerate conveying speed, and improve fluid flowability and transmission efficiency.

[0010] Optionally, the branch guide portion includes:

[0011] Branch base plate;

[0012] The first branch side plate is connected to one side of the branch base plate;

[0013] The second branch side plate is connected to the other side of the branch base plate and is disposed opposite to the first branch side plate;

[0014] The branch bottom plate, the first branch side plate, and the second branch side plate together form the branch guide channel.

[0015] Optionally, the dominant flow section includes:

[0016] Main base plate;

[0017] The first main side plate is connected to one side of the main bottom plate;

[0018] The second main side plate is connected to the other side of the main bottom plate and is disposed opposite to the first main side plate. The main bottom plate, the first main side plate and the second main side plate together form the main flow channel.

[0019] Optionally, the auxiliary foaming device includes two branch guide sections, which are respectively disposed on both sides of the main flow section;

[0020] The main base plate is connected to the branch base plate, the first main side plate is connected to the first branch side plate of one of the two branch guide sections, the second main side plate is connected to the second branch side plate of the other of the two branch guide sections, and the first branch side plates and second branch side plates of each of the two branch guide sections that are not connected to the main guide section are connected to each other.

[0021] Optionally, the auxiliary foaming device has an exhaust groove on the end face away from the bottom wall of the guide channel, and the exhaust groove is provided through the thickness direction of the side wall of the guide channel.

[0022] Optionally, the width of the exhaust groove is 5-10 mm and the depth is 5-10 mm.

[0023] A second aspect of this application provides a foamed board, the foamed board comprising:

[0024] First board;

[0025] The second plate is positioned opposite to and spaced apart from the first plate;

[0026] The aforementioned auxiliary foaming device is located between the first plate and the second plate, and the bottom wall of the guide channel of the auxiliary foaming device is in contact with the first plate or the second plate.

[0027] Foam material is filled between the first plate and the second plate.

[0028] According to the second aspect of this application, the structure of the auxiliary foaming device is similar to that of a channel steel, which can provide higher strength and rigidity when subjected to pressure and tension, thereby improving the mechanical properties of the foamed board after the foaming material has cured and is combined with the foaming material.

[0029] Optionally, the foamed board further includes a beam structure, which is disposed along a first direction on the inner wall surface of the first board and / or the second board;

[0030] The auxiliary foaming device includes two branch flow guides, which are respectively disposed on both sides of the main flow guide. The auxiliary foaming device is located between adjacent beam structures on the second plate or the first plate, and the ends of the branch flow guides away from the main flow guide are in contact with two adjacent beam structures respectively.

[0031] Optionally, the thickness 'a' of the bottom wall of the guide channel is approximately equal to the dimension by which the beam structure protrudes from the first plate or the second plate; and / or

[0032] The width b of the bottom wall of the guide channel is 70-100 mm; and / or

[0033] The dimension c of the auxiliary foaming device along the thickness direction of the foamed board is 75%-85% of the distance between the first board and the second board.

[0034] Optionally, at least two auxiliary foaming devices are provided within the foamed board, wherein the minimum distance from the feed end of the auxiliary foaming device to the edge of the foamed board along the second direction is 1 / 7 to 1 / 5 of the dimension of the foamed board along the second direction, wherein the second direction is perpendicular to the first direction; and / or

[0035] The distance from the discharge end of the auxiliary foaming device to the edge of the foamed board along the first direction is 1 / 3 to 1 / 2 of the dimension of the foamed board along the first direction.

[0036] Optionally, the foamed board further includes a third plate and a fourth plate located between the first plate and the second plate and disposed opposite to each other. The third plate or the fourth plate is provided with an injection section and an exhaust hole, wherein the injection section corresponds to the feed end of the auxiliary foaming device.

[0037] A third aspect of this application provides a method for preparing a foamed board, comprising the following steps:

[0038] Formwork support steps: one of the first plate or the second plate is used as the upper plate, and the other of the first plate or the second plate is used as the lower plate. The lower plate is placed on the support plate, and the formwork support is installed on the edge of the lower plate. The auxiliary foaming device is placed on the lower plate.

[0039] Mold closing steps: Cover the upper plate onto the support mold so that the upper plate, the lower plate and the support mold form the cavity to be filled. Transport the pallet into the fixture and close the mold under the clamping of the upper plate fixture and the lower plate fixture.

[0040] Injection steps: Connect the foaming gun head to the feed end of the main flow section and inject foaming liquid into the cavity to be filled;

[0041] Curing step: The foaming liquid in the cavity to be filled expands and solidifies, completing the curing process;

[0042] In the demolding step, the pallet is moved out of the fixture, the mold support is removed, and the foamed board is obtained.

[0043] The method for preparing foamed boards according to the third aspect of this application improves the foaming effect, reduces subsequent processing work, helps to obtain high-quality foamed boards, and provides a convenient and efficient preparation process.

[0044] Optionally, the injection step further includes: after injecting foaming liquid into the cavity to be filled, disengaging the foaming gun head from the main flow section and plugging the feed end of the main flow section. Attached Figure Description

[0045] The following drawings, illustrating embodiments of this application, are incorporated herein by reference and are used to understand this application. The drawings illustrate embodiments of this application and their descriptions, serving to explain the principles of this application. In the drawings,

[0046] Figure 1 This is a schematic diagram of an auxiliary foaming device for a refrigerated container according to a preferred embodiment of this application;

[0047] Figure 2 for Figure 1 Schematic diagram of section aa;

[0048] Figure 3This is a schematic diagram of a foamed board in the injection foaming process according to a preferred embodiment of this application;

[0049] Figure 4 for Figure 3 A top-down view;

[0050] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0051] Figure 6 A schematic diagram of the third board of the foamed board as the front board in a preferred embodiment of this application;

[0052] Figure 7 This is a schematic diagram of a preferred embodiment of the method for preparing foamed board according to this application.

[0053] Explanation of reference numerals in the attached figures

[0054] 10: Main Flow Section

[0055] 11: Main base plate

[0056] 12: First main side panel

[0057] 13: Second main side panel

[0058] 20: Branch guide section

[0059] 21: Branch base plate

[0060] 22: First branch side plate

[0061] 23: Second branch side plate

[0062] 30: Exhaust channel

[0063] 40: Foaming gun tip

[0064] 50: Injection Section

[0065] 60: First board

[0066] 61: Second board

[0067] 62: Third Board

[0068] 63: Beam Structure

[0069] 64: Foam materials

[0070] 65: Exhaust port

[0071] 70: Pallet

[0072] 71: Formwork

[0073] 72: Upper plate fixture

[0074] 73: Lower plate clamp

[0075] D1: First Direction

[0076] D2: Second Direction Detailed Implementation

[0077] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0078] In this document, ordinal numbers such as “first” and “second” used in this application are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0079] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0080] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0081] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0082] like Figure 1-2As shown, this application provides an auxiliary foaming device for refrigerated containers, including a main flow section 10 and at least two branch flow sections 20. The main flow section 10 is used to connect with the injection gun and is provided with a main flow channel. At least two branch flow sections 20 are connected to the main flow section 10 and extend in different directions. Each branch flow section 20 is provided with a branch flow channel, which communicates with the main flow channel to form a flow channel. In this application, the flow channel can accommodate foaming material. By setting the branch flow sections 20, the landing point of the foaming material sprayed from a high-pressure foaming machine is changed from one to multiple. By changing the number and position of the landing points, the flow filling distance of the foaming liquid is shortened, allowing the foaming material to fully and quickly cover all corners of the container's cavity to be filled, ensuring uniformity and integrity of the filling. Simultaneously, due to the shortened flow distance, the amount of foaming material injected can also be reduced, thereby reducing the cost of the insulation material. In this application, during the conveying process of the foaming material, the flow channel structure reduces the resistance of the fluid, accelerates the conveying speed, and improves the fluidity and transmission efficiency.

[0083] In some embodiments of this application, the branch guide section 20 includes a branch base plate 21, a first branch side plate 22, and a second branch side plate 23. The first branch side plate 22 is connected to one side of the branch base plate 21. The second branch side plate 23 is connected to the other side of the branch base plate 21 and is disposed opposite to the first branch side plate 22. The branch base plate 21, the first branch side plate 22, and the second branch side plate 23 together form a branch guide groove.

[0084] Based on the above embodiment, the main flow section 10 includes a main base plate 11, a first main side plate 12, and a second main side plate 13. The first main side plate 12 is connected to one side of the main base plate 11. The second main side plate 13 is connected to the other side of the main base plate 11 and is disposed opposite to the first main side plate 12. The main base plate 11, the first main side plate 12, and the second main side plate 13 together form the main flow channel.

[0085] Based on the above embodiments, the auxiliary foaming device includes two branch flow guides 20, which are respectively disposed on both sides of the main flow guide 10; wherein, the main base plate 11 is connected to the branch base plate 21, the first main side plate 12 is connected to the first branch side plate 22 of one of the two branch flow guides 20, the second main side plate 13 is connected to the second branch side plate 23 of the other of the two branch flow guides 20, and the first branch side plate 22 and the second branch side plate 23 of each of the two branch flow guides 20 that are not connected to the main flow guide 10 are connected to each other.

[0086] like Figure 2As shown, in some embodiments of this application, the auxiliary foaming device has an exhaust groove 30 on the end face away from the bottom wall of the guide channel, and the exhaust groove 30 is arranged through the thickness direction of the side wall of the guide channel. The figure shows the cross-section of the first branch side plate 22 or the second branch side plate 23. It can be understood that the first main side plate 12 and the second main side plate 13 also have similar exhaust grooves 30. During the foaming process, the foaming material releases gas to form a foam structure. In actual use, the guide channel of the auxiliary foaming device is set with the opening facing upward. During the filling of the foaming material, a certain amount of hot air is generated. The hot air has the tendency to rise and is discharged from the opening of the guide channel. At the same time, since the exhaust groove 30 is set on the end face of the side plate away from the bottom plate, the gas flow during the injection is further enhanced. In this application, by setting the guide channel and the exhaust groove 30, the accumulation of unexpelled gas in the closed space is avoided, the internal pressure is stabilized, and the excessive expansion of gas during the foaming process is avoided, ensuring uniform foaming and stabilizing the foam structure.

[0087] In some embodiments of this application, the width of the venting groove 30 is 5-10 mm and the depth is 5-10 mm. Appropriate width and depth of the venting groove 30 provide sufficient channel space, allowing gas to smoothly exit from the groove, preventing gas accumulation and blockage, and ensuring the quality and uniformity of the filler. The size of the venting groove 30 can also affect the flow rate of the foaming material in the groove, avoiding excessively fast or slow flow, and ensuring the stability and consistency of the filling process.

[0088] like Figure 3-6 As shown, this application also provides a foamed board, including a first board 60, a second board 61, the aforementioned auxiliary foaming device, and foam material 64. The second board 61 is positioned opposite and spaced apart from the first board 60. The auxiliary foaming device is located between the first board 60 and the second board 61, and the bottom wall of the guide channel of the auxiliary foaming device is in contact with either the first board 60 or the second board 61. The foam material 64 fills the space between the first board 60 and the second board 61. The structure of the auxiliary foaming device is similar to channel steel, providing higher strength and rigidity under pressure and tension, thereby improving the mechanical properties of the foamed board after the foam material has cured. The bottom wall of the guide channel of the auxiliary foaming device is in contact with either the first board 60 or the second board 61, meaning that the opening of the guide channel faces upwards during the foamed board preparation process. Utilizing the weight of the transported foam material, the foam material can be well supported within the guide channel, allowing it to reach designated areas through the branch guide sections 20 extending in different directions, achieving rapid filling of the foam material.

[0089] In some embodiments of this application, the foamed board further includes a beam structure 63, which is disposed along a first direction D1 on the inner wall surface of the first plate 60 and / or the second plate 61. The auxiliary foaming device includes two branch guide sections 20, which are respectively disposed on both sides of the main flow section 10. The auxiliary foaming device is located between adjacent beam structures 63 on the second plate 61 or the first plate 60, and the ends of the branch guide sections 20 away from the main flow section 10 are in contact with the two adjacent beam structures 63 respectively. The beam structure 63 can increase the overall rigidity of the foamed board, enabling it to withstand greater external pressure and load. During transportation, the foamed board may be subjected to forces such as impact, vibration, and stacking. The beam structure 63 can effectively disperse these forces, reduce deformation and damage to the box, and extend the service life of the foamed board. The branches of the auxiliary foaming structure, located away from the main flow channel, contact the beam structures 63 of the lower plate. During the foaming process, this prevents the foaming material from initially filling the area between the two beam structures 63. Furthermore, the obstruction of the beam structures 63 on both sides could cause foaming material accumulation, leading to inconsistent foaming after curing due to different foaming times. The outlet end of the auxiliary foaming device contacts the beam structures 63, ensuring that the foaming material first fills the areas at both ends of the two beam structures 63. After filling to a certain extent, the foaming material then fills the area between the two beam structures 63, resulting in uniform and consistent foaming within the container.

[0090] In some embodiments of this application, the thickness 'a' of the bottom wall of the guide channel is approximately equal to the size of the beam structure 63 protruding from the first plate 60 or the second plate 61.

[0091] In some embodiments of this application, the width b of the bottom wall of the guide channel is 70-100 mm.

[0092] In some embodiments of this application, the dimension c of the auxiliary foaming device along the thickness direction of the foaming board is 75%-85% of the distance between the first board 60 and the second board 61.

[0093] In some embodiments of this application, at least two auxiliary foaming devices are provided within the foamed board. The minimum distance from the inlet end of the auxiliary foaming device to the edge of the foamed board along the second direction D2 is 1 / 7 to 1 / 5 of the dimension of the foamed board along the second direction D2, where the second direction D2 is perpendicular to the first direction D1. In some embodiments of this application, the distance from the outlet end of the auxiliary foaming device to the edge of the foamed board along the first direction D1 is 1 / 3 to 1 / 2 of the dimension of the foamed board along the first direction D1. Providing multiple auxiliary foaming devices within the container panel allows for injection of foaming material from multiple locations, ensuring uniform filling of the container interior and preventing localized accumulation or unevenness. Setting the inlet end at 1 / 7 to 1 / 5 of the dimension along the second direction D2 at both ends of the foamed board and setting the outlet end at 1 / 3 to 1 / 2 of the dimension along the first direction D1 shortens the filling path of the foaming material, reduces the flow distance during filling, improves filling efficiency and saves time, and enhances the consistency of foaming at the same location.

[0094] In some embodiments of this application, the foamed board further includes a third plate 62 and a fourth plate located between the first plate 60 and the second plate 61 and disposed opposite to each other. The third plate 62 or the fourth plate is provided with an injection section 50 and an exhaust port 65, wherein the injection section 50 corresponds to the feed end of the auxiliary foaming device. The injection port is used to install a spray gun, and the feed end of the main channel is directly opposite the injection port. Preferably, the injection port is a tubular structure, with the spray gun and the main channel inserted into the injection port. The injection port design makes operation more convenient and easier. The operator only needs to insert the spray gun into the injection port to begin injecting the foaming material, without the need for additional tools or complex operating procedures. Preferably, the outer diameter of the spray gun is not greater than the width of the concave groove opening. The spray gun is inserted into the concave groove to achieve a tight connection, avoiding leakage and overflow of the foaming material during the injection process. At the same time, the auxiliary foaming structure helps to accurately guide the foaming material to the area that needs to be filled, preventing waste and contamination. The inserted connection can effectively seal the auxiliary foaming structure, preventing dust, impurities or other substances from entering the auxiliary foaming structure and maintaining the purity of the foaming material.

[0095] This application also provides a method for preparing foamed boards, such as... Figure 7 The system shown is used to prepare the above-mentioned foamed boards, including the following steps:

[0096] Formwork support steps: One of the first plate 60 or the second plate 61 is used as the upper plate, and the other of the first plate 60 or the second plate 61 is used as the lower plate. The lower plate is placed on the support plate 70, and the formwork support 71 is installed on the edge of the lower plate. The auxiliary foaming device is placed on the lower plate.

[0097] Mold closing steps: Cover the upper plate onto the support mold 71 so that the upper plate, lower plate and support mold 71 form the cavity to be filled. Transport the pallet 70 into the fixture and close the mold under the clamping of the upper plate fixture 72 and the lower plate fixture 73.

[0098] Injection steps: Connect the foaming gun head 40 to the feed end of the main flow section 10 and inject foaming liquid into the cavity to be filled;

[0099] Curing step: The foaming liquid in the cavity to be filled expands and solidifies, completing the curing process;

[0100] In the demolding step, the pallet 70 is moved out of the fixture, the support mold 71 is removed, and the foamed board is obtained.

[0101] Based on the above embodiment, a third plate 62 and a fourth plate are provided between the first plate 60 and the second plate 61, spaced apart from each other. The third plate 62 serves as the front plate and is located near the foaming gun head 40. The third plate 62 is provided with an injection section 50 and an vent hole 65.

[0102] In some embodiments of this application, the injection step further includes: after injecting foaming liquid into the cavity to be filled, removing the foaming gun head 40 from the main flow section 10 and plugging the feed end of the main flow section 10.

[0103] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0104] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A foamed board, characterized in that, include: First board; The second plate is positioned opposite to and spaced apart from the first plate; Foam material is filled between the first plate and the second plate; An auxiliary foaming device, the auxiliary foaming device comprising: A main flow section is provided, which is used to connect with the injection gun and has a main flow groove. At least two branch flow guides are provided, and at least two of the branch flow guides are connected to the main flow guide and extend in different directions. Each branch flow guide is provided with a branch flow guide groove, wherein the branch flow guide groove is connected to the main flow groove to form a flow guide groove. The flow guide groove is set with its opening facing upward. An exhaust groove is provided on the end face of the auxiliary foaming device away from the bottom wall of the flow guide groove. The exhaust groove is set through the thickness direction of the side wall of the flow guide groove. The auxiliary foaming device is located between the first plate and the second plate, and the bottom wall of the guide channel of the auxiliary foaming device is in contact with the first plate or the second plate.

2. The foamed board according to claim 1, characterized in that, The branch guide section includes: Branch base plate; The first branch side plate is connected to one side of the branch base plate; The second branch side plate is connected to the other side of the branch base plate and is disposed opposite to the first branch side plate; wherein... The branch bottom plate, the first branch side plate, and the second branch side plate together form the branch guide channel.

3. The foamed board according to claim 2, characterized in that, The dominant flow section includes: Main base plate; The first main side plate is connected to one side of the main bottom plate; The second main side plate is connected to the other side of the main base plate and is disposed opposite to the first main side plate; wherein... The main bottom plate, the first main side plate, and the second main side plate together form the main flow channel.

4. The foamed board according to claim 3, characterized in that, The auxiliary foaming device includes two branch flow guides, which are respectively disposed on both sides of the main flow guide. The main base plate is connected to the branch base plate, the first main side plate is connected to the first branch side plate of one of the two branch guide sections, the second main side plate is connected to the second branch side plate of the other of the two branch guide sections, and the first branch side plates and second branch side plates of each of the two branch guide sections that are not connected to the main guide section are connected to each other.

5. The foamed board according to claim 1, characterized in that, The exhaust groove has a width of 5-10mm and a depth of 5-10mm.

6. The foamed board according to claim 1, characterized in that, The foamed board also includes a beam structure, which is disposed along a first direction on the inner wall surface of the first board and / or the second board; The auxiliary foaming device includes two branch flow guides, which are respectively disposed on both sides of the main flow guide. The auxiliary foaming device is located between adjacent beam structures on the second plate or the first plate, and the ends of the branch flow guides away from the main flow guide are in contact with two adjacent beam structures respectively.

7. The foamed board according to claim 6, characterized in that, The thickness 'a' of the bottom wall of the guide channel is approximately equal to the dimension by which the beam structure protrudes from the first plate or the second plate; and / or The width b of the bottom wall of the guide channel is 70-100mm; and / or The dimension c of the auxiliary foaming device along the thickness direction of the foamed board is 75%-85% of the distance between the first board and the second board.

8. The foamed board according to claim 6, characterized in that, At least two auxiliary foaming devices are provided within the foamed board. The minimum distance from the feed end of the auxiliary foaming device to the edge of the foamed board along the second direction is 1 / 7 to 1 / 5 of the dimension of the foamed board along the second direction, wherein the second direction is perpendicular to the first direction; and / or The distance from the discharge end of the auxiliary foaming device to the edge of the foamed board along the first direction is 1 / 3 to 1 / 2 of the dimension of the foamed board along the first direction.

9. The foamed board according to claim 1, characterized in that, The foamed board also includes a third plate and a fourth plate located between the first plate and the second plate and arranged opposite to each other. The third plate or the fourth plate is provided with an injection section and an exhaust hole, wherein the injection section corresponds to the feed end of the auxiliary foaming device.

10. A method for preparing a foamed board, used to prepare a foamed board according to any one of claims 1-9, characterized in that, Includes the following steps: Formwork support steps: one of the first plate or the second plate is used as the upper plate, and the other of the first plate or the second plate is used as the lower plate. The lower plate is placed on the support plate, and the formwork support is installed on the edge of the lower plate. The auxiliary foaming device is placed on the lower plate. Mold closing steps: Cover the upper plate onto the support mold so that the upper plate, the lower plate and the support mold form the cavity to be filled. Transport the pallet into the fixture and close the mold under the clamping of the upper plate fixture and the lower plate fixture. Injection steps: Connect the foaming gun head to the feed end of the main flow section and inject foaming liquid into the cavity to be filled; Curing step: The foaming liquid in the cavity to be filled expands and solidifies, completing the curing process; In the demolding step, the pallet is moved out of the fixture, the mold support is removed, and the foamed board is obtained.

11. The method for preparing foamed board according to claim 10, characterized in that, The injection step further includes: after injecting foaming liquid into the cavity to be filled, disengaging the foaming gun head from the main flow section and plugging the feed end of the main flow section.

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