A foaming process at the top corner of an insulation container and an insulation container

Abstract

A foaming process at a top corner of an insulation container and the insulation container. The insulation container comprises a top plate and a side plate, the top plate comprises an inner top plate, an outer top plate and a top insulation layer between the inner top plate and the outer top plate, the side plate comprises an inner side plate, an outer side plate and a side insulation layer between the inner side plate and the outer side plate, wherein the outer top plate is connected with the outer side plate, the top insulation layer and the side insulation layer have a cavity therebetween, and the inner top plate is spaced apart from the inner side plate to form an opening to the cavity. The foaming process at the top corner of the insulation container comprises: a spraying step of controlling a spraying device to spray a foaming material into the cavity through the opening in a length direction of the insulation container; and a closing step of installing an elastomer sealing plate to the opening corresponding to the part of the cavity filled with the foaming material during the spraying step, and fixing the elastomer sealing plate to the inner top plate and the outer top plate, so that the foaming material can be bonded with the elastomer sealing plate after expansion and solidification.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of containers, in particular to a foaming process for the top corner of an insulation container and an insulation container. BACKGROUND

[0002] At present, there is a cavity at the top corner of the insulation container after assembly, which needs to be filled by secondary foaming. The traditional process generally adopts multiple processes such as “sponge tape sticking (top corner sealing two side walls) → sealant coating (preventing water vapor from entering) → rivet fixing (connecting the inner top plate and the inner side plate) → secondary foaming”.

[0003] However, such a process has significant technical defects, for example:

[0004] The process is complicated and highly dependent on manual operation. The traditional process needs to go through multiple processes, and the core steps such as tape sticking and rivet fixing rely on manual operation, which not only has high labor intensity, but also has high labor cost proportion;

[0005] Low production efficiency: the secondary foaming process needs to complete the steps of top mold installation, foaming material injection, pressure holding and curing, rivet plugging injection hole, mold removal, etc. in turn, and is limited by the pressure holding time. The single box production cycle is long, which is difficult to adapt to the rhythm of large-scale production line;

[0006] Unstable quality of foam body: the secondary foaming area is limited in space due to the closed mold, and the flowability of the foaming material is blocked, which is easy to form air bubbles, uneven density and other defects. After curing, the foam body is easy to produce gaps due to stress shrinkage, which increases the heat leakage rate of the refrigerated container and seriously affects the insulation performance.

[0007] Therefore, a foaming process for the top corner of an insulation container and an insulation container are needed to at least partially solve the above problems. SUMMARY

[0008] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the detailed description section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solutions, nor to attempt to determine the protection scope of the claimed technical solutions.

[0009] To at least partially solve the above problems, a first aspect of the present application provides a foaming process for a top corner of an insulation container, the insulation container comprising a top plate and a side plate, the top plate comprising an inner top plate, an outer top plate and a top insulation layer between the inner top plate and the outer top plate, the side plate comprising an inner side plate, an outer side plate and a side insulation layer between the inner side plate and the outer side plate, wherein the outer top plate is connected with the outer side plate, the top insulation layer and the side insulation layer have a cavity therebetween, the inner top plate is spaced apart from the inner side plate to form an opening to the cavity, and the foaming process for the top corner of the insulation container comprises:

[0010] a spraying step, in which a spraying device is controlled to spray foaming material into the cavity through the opening along a length direction of the insulation container;

[0011] a closing step, in which an elastomer closing plate is installed at the opening corresponding to the part of the cavity filled with the foaming material, and the elastomer closing plate is fixedly connected with the inner top plate and the outer top plate, so that the foaming material can be bonded with the elastomer closing plate after expansion and solidification.

[0012] According to the foaming process for the top corner of the insulation container, a semi-open foaming mode of spraying and installing simultaneously is adopted, which has higher quality and higher automation degree than traditional closed foaming in terms of foaming, and saves the process such as rivet fixing in traditional closed foaming, further saving labor, improving efficiency and saving cost.

[0013] Optionally, the elastomer closing plate is continuously installed along the length direction.

[0014] Optionally, the elastomer closing plate comprises:

[0015] a top closing part, which is provided with a top clamping part towards a side surface of the outer top plate, and a top clamping groove is formed between the top clamping part and the top closing part;

[0016] a side closing part, which is provided with a side clamping part towards a side surface of the outer side plate, and a side clamping groove is formed between the side closing part and the side clamping part, and the top closing part is connected with the side closing part at an angle to form a bending corner protruding towards the cavity between the top closing part and the side closing part;

[0017] When the elastomer closing plate is installed to the opening, the edge of the inner top plate is embedded in the top clamping groove, and the edge of the inner side plate is embedded in the side clamping groove.

[0018] Optionally, the elastomer closing plate further comprises:

[0019] a top elastic buckle part, which is provided at an end of the top closing part and is bent towards the top plate.

[0020] a side elastic buckle part, arranged at the end of the side sealing part, which is bent towards the side plate.

[0021] Optionally, the closing step comprises: applying a force to the top sealing part and the side sealing part of the elastic sealing plate in a direction towards each other, so that the top sealing part and the side sealing part are bent in a direction towards each other, and the bent angle of the elastic sealing plate is pushed into the cavity, so that the edge of the inner top plate is aligned with the top clamping groove and the edge of the inner side plate is aligned with the side clamping groove, and then the force is removed so that the elastic sealing plate rebounds, and the edge of the inner top plate is embedded in the top clamping groove to form a snap, and the edge of the inner side plate is embedded in the side clamping groove to form a snap.

[0022] Optionally, the spraying step further comprises a protection step: laying a protective film on the edges of the inner top plate and the outer top plate before the spraying step.

[0023] The process further comprises a deprotection step: removing the protective film before installing the elastic sealing plate.

[0024] Optionally, when the required spraying thickness is greater than 25 mm, the foaming process at the top corner of the thermal container comprises at least two spraying steps, and the closing step is performed after the last spraying step.

[0025] Optionally, the foaming process at the top corner of the thermal container is carried out in a top corner foaming workshop, the top corner foaming workshop is located downstream of a painting workshop, the thermal container enters the top corner foaming workshop after being painted in the painting workshop, so that the temperature of the container body is 30-50℃ when the thermal container enters the top corner foaming workshop.

[0026] Optionally, the top corner foaming workshop is provided with two foaming workstations, the two foaming workstations are arranged at both ends of the length direction of the thermal container, and the spraying equipment at the two foaming workstations synchronously performs the spraying step.

[0027] Optionally, the top corner foaming workshop is further provided with two inspection workstations, the two inspection workstations are arranged on both sides of the width direction of the thermal container.

[0028] The foaming process at the top corner of the thermal container further comprises a cleaning and inspection step, the cleaning and inspection step is synchronously performed with the spraying step, and the cleaning and inspection step comprises: inspecting and cleaning the outer facade of the thermal container.

[0029] Optionally, the expansion and solidification time of the foaming material is matched with the time required for the cleaning and inspection step, so that the closing step and the cleaning and inspection step can be completed synchronously.

[0030] Optionally, the spraying device comprises:

[0031] A track assembly comprising a track arranged along the length direction and a moving part configured to move along the track;

[0032] A spraying assembly arranged on the moving part, the spraying assembly comprising a pressure pump, a storage barrel and a spray gun.

[0033] Optionally, the distance between the spray nozzle of the spray gun and the spraying surface is 30-50 cm, and the spraying pressure is 0.3-0.5 MPa.

[0034] Optionally, the elastic body sealing plate is made of polyurethane elastomer, silica gel elastomer or EPDM elastomer.

[0035] The second aspect of the present application provides a thermal insulation container manufactured by the foaming process at the top corner of the thermal insulation container according to the first aspect.

[0036] The thermal insulation container according to the present application has similar technical effects to the foaming process at the top corner of the thermal insulation container according to the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0037] The following drawings of the present application are hereby incorporated as part of the present application for the purpose of understanding the present application. The embodiments of the present application and the description thereof shown in the drawings are used to explain the principles of the present application. In the drawings:

[0038] Figure 1 FIG. 1 is a sectional view of a thermal insulation container according to an embodiment of the present application, showing the cross section of the thermal insulation container when no foaming material is sprayed at the top corner of the thermal insulation container;

[0039] Figure 2 FIG. 3 is a schematic view showing the spraying of foaming material in the cavity at the top corner of the thermal insulation container;

[0040] Figure 3 FIG. 5 is a sectional view of the thermal insulation container according to an embodiment of the present application, showing the cross section of the thermal insulation container after the elastic body sealing plate is installed at the top corner of the thermal insulation container;

[0041] Figure 4 FIG. 6 is a structural schematic view of the elastic body sealing plate of the thermal insulation container according to an embodiment of the present application; and

[0042] Figure 5 FIG. 8 shows a schematic view of the arrangement of the inspection station and the foaming station.

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] 100: thermal insulation container; 110: top plate; 111: inner top plate; 112: outer top plate; 113: top thermal insulation layer; 120: side plate; 121: inner side plate; 122: outer side plate; 123: side thermal insulation layer; 130: cavity; 140: opening; 150: foamed elastomer; 160: elastomer sealing plate; 161: top sealing portion; 162: top clamping portion; 163: top clamping groove; 164: side sealing portion; 165: side clamping portion; 166: side clamping groove; 167: bending angle; 168: top elastic buckle portion; 169: side elastic buckle portion; 20: spraying assembly; 30: track assembly. DETAILED DESCRIPTION

[0045] In the following description, numerous specific details are given to provide a thorough understanding of the application. However, it will be apparent that the application can be practiced without one or more of the specific details. In other instances, well-known

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0047] The ordinal numbers such as "first" and "second" used in the present application are merely identifiers instead of any other meaning, for example, a specific order. Also, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and similar expressions used herein are for illustrative purposes only and are not limiting.

[0048] Reference will now be made to Figures 1 to 5 Example embodiments in accordance with the present application will be described in more detail.

[0049] One aspect of the present application provides a thermal insulation container 100, and another aspect provides a foaming process at a top corner of a thermal insulation container.

[0050] Reference will now be made to Figure 1The heat preservation container 100 comprises a top plate 110 and a side plate 120, wherein the top plate 110 is arranged in a substantially horizontal direction, the side plate 120 is arranged in a substantially vertical direction, and the top plate 110 and the side plate 120 are connected to form a top corner. The top plate 110 comprises an inner top plate 111, an outer top plate 112, and a top heat preservation layer 113, wherein the inner top plate 111 is arranged in a spaced manner with the outer top plate 112, and the top heat preservation layer 113 is arranged between the inner top plate 111 and the outer top plate 112. The side plate 120 comprises an inner side plate 121, an outer side plate 122, and a side heat preservation layer 123, wherein the inner side plate 121 and the outer side plate 122 are arranged in a spaced manner, and the side heat preservation layer 123 is arranged between the inner side plate 121 and the outer side plate 122. The top heat preservation layer 113 and the side heat preservation layer 123 can be made of prefabricated foaming material, or can be made by foaming grouting process between the inner top plate 111 and the outer top plate 112 and between the inner side plate 121 and the outer side plate 122.

[0051] The outer top plate 112 is connected with the outer side plate 122, the top heat preservation layer 113 and the side heat preservation layer 123 have a cavity 130 therebetween, the inner top plate 111 is arranged in a spaced manner with the inner side plate 121 to form an opening 140 to the cavity 130, and the foaming process at the top corner of the heat preservation container comprises a spraying step and a closing step.

[0052] Referring to Figure 2 The spraying step comprises: controlling the spraying equipment to spray foaming material into the cavity 130 through the opening 140 along the length direction of the heat preservation container 100.

[0053] Referring to Figure 3 The closing step comprises: installing an elastomer sealing plate 160 to the opening 140 corresponding to the part of the cavity 130 filled with foaming material, and fixing the elastomer sealing plate 160 with the inner top plate 111 and the outer top plate 112, so that the foaming material can be bonded with the elastomer sealing plate 160 after the foaming material is expanded and solidified to form a foaming elastomer 150.

[0054] According to the foaming process at the top corner of the heat preservation container, the semi-open foaming mode of spraying and installing simultaneously is adopted, which has higher quality and higher automation degree of foaming body in the spraying aspect than the traditional closed foaming, and saves the process such as rivet fixing in the traditional closed foaming, further saving labor, improving efficiency and saving cost.

[0055] More specifically, the spraying equipment comprises a track assembly 30 and a spraying assembly 20. The track assembly 30 comprises a track arranged in a length direction and a moving part configured to move along the track. The spraying assembly 20 is arranged on the moving part, and the spraying assembly 20 comprises a pressure pump, a storage barrel, and a spray gun.

[0056] The position of the track assembly 30 can be substantially the same as the position of the opening 140, whereby after the automatic control system moves the moving part to the designated position, the moving part moves at a constant speed in the length direction, for example, in the direction from the front end to the rear end or in the direction from the rear end to the front end, and the spray gun also sprays at a constant speed under control. Compared with the traditional process of first closing the cavity 130 and then injecting the material, the automatic spraying in the semi-open environment of the present application greatly reduces the labor cost, and the semi-open space is conducive to operation, eliminates the space limitation, improves the uniformity of the sprayed foam body, avoids the accumulation and dripping of the material, and reduces the quality fluctuation caused by human error.

[0057] In order to further improve the production efficiency, with reference to Figure 5 Two foam spraying stations can be configured for one thermal container 100, and the two foam spraying stations are respectively located on the two sides of the thermal container 100 in the length direction. In other words, one spraying device is arranged at each end of the thermal container 100. Thus, the two spraying devices simultaneously enter the box body to perform the foam spraying operation, for example, one device can uniformly move from the end, and the other device can uniformly move from the middle in the same direction, or the two devices can move towards each other from the ends. After the spraying is completed, the spray gun is retracted and the moving part returns along the original path.

[0058] In order to further improve the quality of the foam body, when the required spraying thickness is greater than 25 mm, the foaming process at the top corner of the thermal container includes at least two spraying steps, and the spraying thickness of each spraying step is not more than 25 mm, so as to avoid local accumulation. The closing step described above is performed after the last spraying step.

[0059] As a preferred embodiment, the foaming process is performed after the coating is completed. Specifically, a coating workshop and a top corner foaming workshop are arranged on the production line, and the top corner foaming workshop is arranged downstream of the coating workshop. The thermal container 100 enters the top corner foaming workshop after the coating is completed in the coating workshop. Since the inherent process of the coating workshop makes the temperature of the box body high, the temperature of the box body is still 30-50℃ when the thermal container 100 enters the top corner foaming workshop. This temperature can assist the rapid solidification of the foaming material, and a heating oven for solidification can be avoided in the top corner foaming process. This not only shortens the solidification period and speeds up the production efficiency, but also greatly reduces the production cost.

[0060] Accordingly, since the top corner foaming is performed after the painting process, the inner surface of the container needs to be protected before spraying the foaming material to reduce splashing pollution. As an example, a protection step is added before the spraying step, i.e. laying a protective film on the edges of the inner roof 111 and the outer roof 112. A deprotection step is added before the closing step is performed, i.e. removing the protective film before the elastomer closure plate 160 is installed. As a preferred embodiment, the distance between the nozzle of the spray gun and the spraying surface is controlled to be 30-50 cm, and the spraying pressure is controlled to be 0.3-0.5 MPa, so as to further reduce splashing.

[0061] As an optional embodiment, referring to Figure 5 , in order to further improve production efficiency, the thermal insulation container 100 can also be cleaned and inspected at the same time as the top corner foaming, i.e. the outer facade after the previous painting process is inspected and cleaned. In other words, the foaming process at the top corner of the thermal insulation container 100 also includes a cleaning and inspection step, which is performed synchronously with the spraying step. Preferably, the top corner foaming workshop is also provided with two inspection stations, which are arranged on both sides of the width direction of the thermal insulation container 100.

[0062] It should be noted that the expansion and solidification time of the foaming material can be adjusted to match the time required for the cleaning and inspection step, so that the closing step and the cleaning and inspection step can be completed synchronously. For example, the expansion and solidification time of the foaming material is adjusted to 3-5 min.

[0063] The closing step of the foaming process at the top corner of the thermal insulation container will be described in detail below. The elastomer closure plate 160 is made of polyurethane elastomer, silicone elastomer or EPDM elastomer. Referring to Figure 3 and Figure 4 , the elastomer closure plate 160 includes a top sealing portion 161 and a side sealing portion 164. The top sealing portion 161 is provided with a top clamping portion 162 towards the side surface of the outer roof 112, and a top clamping groove 163 is formed between the top clamping portion 162 and the top sealing portion 161. The side sealing portion 164 is provided with a side clamping portion 165 towards the side surface of the outer side plate 122, and a side clamping groove 166 is formed between the side clamping portion 165 and the side sealing portion 164. The top sealing portion 161 is connected at an angle with the side sealing portion 164 to form a bending angle 167 protruding towards the cavity 130 between the top sealing portion 161 and the side sealing portion 164. When the elastomer closure plate 160 is installed to the opening 140, the edge of the inner roof 111 is embedded in the top clamping groove 163, and the edge of the inner side plate 121 is embedded in the side clamping groove 166. As a preferred embodiment, the elastomer closure plate 160 is continuously installed along the length direction. That is, the elastomer closure plate 160 is configured as an integral member along the length direction.

[0064] More specifically, since the elastomer sealing plate 160 is elastic, it can be quickly and snugly installed by deforming it. For example, the sealing step includes: applying a force to the top sealing portion 161 and the side sealing portion 164 of the elastomer sealing plate 160 in a direction of approaching each other, so that the top sealing portion 161 and the side sealing portion 164 are bent in the direction of approaching each other, and the bent corner 167 of the elastomer sealing plate 160 is pushed into the cavity 130, so that the edge of the inner top plate 111 aligns with the top clamping groove 163 and the edge of the inner side plate 121 aligns with the side clamping groove 166, and then the force is removed so that the elastomer sealing plate 160 rebounds, and the edge of the inner top plate 111 is embedded in the top clamping groove 163 to form a snap fit, and the edge of the inner side plate 121 is embedded in the side clamping groove 166 to form a snap fit.

[0065] In order to further improve the installation strength, the end of the top sealing portion 161 can be provided with a top elastic buckle portion 168 which is bent towards the direction of the top plate 110, and the end of the side sealing portion 164 can be provided with a side elastic buckle portion 169 which is bent towards the direction of the side plate 120. Thus, after the inner top plate 111 and the top clamping groove 163, and the inner side plate 121 and the side clamping groove 166 form a snap fit, the elasticity of the top elastic buckle portion 168 and the side elastic buckle portion 169 makes the top sealing portion 161 and the side sealing portion 164 respectively have a tendency to move away from the top plate 110 and the side plate 120, so that the inner top plate 111 is locked in the top clamping groove 163 and the inner side plate 121 is locked in the side clamping groove 166. Further, it is ensured that the foaming material does not drive the elastomer sealing plate 160 to displace during the process of fully expanding and solidifying to form the foamed elastomer 150, greatly improving the bonding strength between the two.

[0066] In summary, the foaming process at the top corner of the thermal insulation container of the present application greatly simplifies the process compared to the traditional process, eliminates multiple processes such as sponge tape application, rivet fixing, secondary foaming mold disassembly, etc., and shortens the production time of a single container by more than 40%. And it improves the degree of automation of production, replaces manual operation with automatic foaming and sliding components, reduces labor costs, and also avoids quality fluctuations caused by human error. The semi-open foaming eliminates space restrictions, improves the uniformity of the foam density, and accelerates the curing of the residual heat of the container left by the coating process, reduces shrinkage gaps, and significantly reduces heat leakage. In addition, the use of residual heat of the container after coating for curing saves energy consumption of separately building an oven, and combined with the reduction of auxiliary materials such as tape and rivets, the overall cost of the product is reduced.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The features described herein in one embodiment can be used in another embodiment unless the features are not compatible or are otherwise stated otherwise.

[0068] The application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and the application is not limited to the above-mentioned embodiments, and more kinds of variations and modifications can be made according to the teachings of the application, which all fall within the scope of the application claimed.

Claims

1. A process for insulating the roof corner of a shipping container, characterized by, The heat preservation container comprises a top plate and a side plate, the top plate comprises an inner top plate, an outer top plate and a top heat preservation layer between the inner top plate and the outer top plate, the side plate comprises an inner side plate, an outer side plate and a side heat preservation layer between the inner side plate and the outer side plate, wherein the outer top plate is connected with the outer side plate, the top heat preservation layer and the side heat preservation layer have a cavity therebetween, the inner top plate is spaced apart from the inner side plate to form an opening to the cavity, and a foaming process at the corner of the heat preservation container top comprises: a spraying step, along the length direction of the heat preservation container, controlling a spraying device to spray foaming material into the cavity through the opening; a closing step, installing an elastomer sealing plate to the opening corresponding to the part of the cavity filled with foaming material, and making the elastomer sealing plate fixedly connected with the inner top plate and the outer top plate, so that the foaming material can be bonded with the elastomer sealing plate after expansion and solidification, wherein the elastomer sealing plate comprises: a top sealing part, the top sealing part is provided with a top clamping part towards the side of the outer top plate, a top clamping groove is formed between the top clamping part and the top sealing part, and a side sealing part, the side sealing part is provided with a side clamping part towards the side of the outer side plate, a side clamping groove is formed between the side sealing part and the side clamping part, the top sealing part and the side sealing part are connected at an angle to form a bending angle protruding towards the cavity between the top sealing part and the side sealing part, when the elastomer sealing plate is installed to the opening, the edge of the inner top plate is embedded in the top clamping groove, and the edge of the inner side plate is embedded in the side clamping groove, the closing step further comprises applying a force to the top sealing part and the side sealing part of the elastomer sealing plate in a direction towards each other, so that the top sealing part and the side sealing part are bent in a direction towards each other, and the bending angle of the elastomer sealing plate is pushed into the cavity, so that the edge of the inner top plate is aligned with the top clamping groove and the edge of the inner side plate is aligned with the side clamping groove, then the force is removed so that the elastomer sealing plate rebounds, and the edge of the inner top plate is embedded in the top clamping groove to form a bite, and the edge of the inner side plate is embedded in the side clamping groove to form a bite.

2. The process for foaming at the roof corners of an insulated shipping container according to claim 1, wherein, The elastomer sealing plate is continuously installed along the length direction.

3. The process for foaming at the roof corners of an insulated shipping container according to claim 1, wherein, The elastomer sealing plate further comprises: a top elastic buckle part, the top elastic buckle part is provided at the end of the top sealing part and is bent towards the direction of the top plate; a side elastic buckle part, the side elastic buckle part is provided at the end of the side sealing part and is bent towards the direction of the side plate.

4. The foaming process at the corner of the heat preservation container top according to claim 1, wherein the spraying step further comprises a protection step: laying a protection film on the edges of the inner top plate and the outer top plate before the spraying step; the closing step further comprises a deprotection step: removing the protection film before installing the elastomer sealing plate.

5. The process for foaming at the roof corners of an insulated shipping container according to claim 1, wherein, When the required spraying thickness is greater than 25 mm, the foaming process at the corner of the heat preservation container top comprises at least two spraying steps, and the closing step is performed after the last spraying step.

6. The process for foaming at the roof corners of an insulated shipping container according to claim 1, wherein, The foaming process at the top corner of the thermal container is carried out in a top corner foaming workshop, the top corner foaming workshop is located downstream of a painting workshop, the thermal container enters the top corner foaming workshop after being painted in the painting workshop, so that the temperature of the thermal container is 30-50℃ when it enters the top corner foaming workshop.

7. A process for insulating the roof corners of a shipping container according to claim 6, wherein, The top corner foaming workshop is provided with two spraying and foaming stations, the two spraying and foaming stations are arranged at two ends of the length direction of the thermal container, and the spraying equipment on the two spraying and foaming stations synchronously performs the spraying step.

8. The process of claim 7, wherein, The top corner foaming workshop is also provided with two inspection stations, the two inspection stations are arranged at two sides of the width direction of the thermal container. The foaming process at the top corner of the thermal container also includes a cleaning and inspection step, the cleaning and inspection step is synchronously performed with the spraying step, and the cleaning and inspection step includes inspecting and cleaning the outer facade of the thermal container.

9. A process for insulating the roof corners of a shipping container according to claim 8, wherein, The expansion and solidification time of the foaming material matches the time required by the cleaning and inspection step, so that the closing step and the cleaning and inspection step can be synchronously completed.

10. The process for foaming at the roof corners of an insulated shipping container according to claim 1, wherein, The spraying equipment includes: a track assembly, the track assembly includes a track and a moving part, the track is arranged along the length direction, and the moving part is configured to move along the track; a spraying assembly, the spraying assembly is arranged on the moving part, and the spraying assembly includes a pressure pump, a storage barrel and a spray gun.

11. A process for insulating the roof corners of a shipping container according to claim 10, wherein, The distance between the nozzle of the spray gun and the spraying surface is 30-50cm, and the spraying pressure is 0.3-0.5MPa.

12. The process for foaming at the roof corners of a thermal insulated shipping container according to claim 1, characterized in that, The elastic body sealing plate is made of polyurethane elastomer, silica gel elastomer or EPDM elastomer.

13. A thermal insulation container, characterized in that, The thermal container is manufactured by using the foaming process at the top corner of the thermal container according to any one of claims 1-12.

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