Treatment process of special-shaped chamfered vacuum insulated panel

Abstract

The invention relates to the technical field of vacuum insulation panels, and discloses a treatment process of a special-shaped corner cut vacuum insulation panel, which comprises the following steps: filling a special-shaped corner cut core material into a film bag, vacuumizing, carrying out hot sealing on all the film bags corresponding to the special-shaped corner cut position to obtain a hot sealing area, extending the edge of the special-shaped corner cut towards the hot sealing area by a preset sealing width distance, and sealing the special-shaped corner cut core material in the hot sealing area to obtain the special-shaped corner cut vacuum insulation panel. Cutting is conducted according to the connecting line between the corner point, corresponding to the heat sealing area, of the film bag and the center point, away from the special-shaped corner cut, of the edge, away from the special-shaped corner cut, of the width sealing area, the two cut redundant film bags are subjected to edge folding, and finally the finished special-shaped corner cut vacuum heat insulation plate is obtained. According to the method, the sealing width distance is reserved at the special-shaped corner cutting position, and the edge folding operation is carried out, so that the sealing reliability, the structural stability, the installation adaptability and the economic practicability of the special-shaped corner cutting vacuum insulation plate are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vacuum insulation panels, and particularly relates to a processing technology of a vacuum insulation panel with a special-shaped cut corner. BACKGROUND

[0002] A vacuum insulation panel (VIP for short) is a new type of thermal insulation material, which has a low thermal conductivity, a good thermal insulation effect, and a small space proportion, and is widely used in various fields. Glass fiber is made of glass balls or waste glass as raw materials through high-temperature melting, wire drawing and other processes, and is an inorganic non-metallic material with excellent performance, good insulation, high heat resistance, good corrosion resistance and high mechanical strength, and can be used in the field of thermal insulation.

[0003] At present, for the vacuum insulation panel with a special-shaped cut corner at the edge position, the typical processing method in the industry is as follows: after the vacuum insulation panel is completed, the vacuum is sealed, the edge part of the special-shaped cut corner is directly subjected to ironing sealing treatment to form an ironing sealing area; after the ironing sealing is cooled, the excess film bag beyond the preset size at the special-shaped cut corner is cut and removed by using a cutting tool, the whole process does not pass through a folding step, and finally a plate body structure with a special-shaped cut corner is formed.

[0004] Through this processing method, the bonding strength of the special-shaped cut corner edge film bag after cutting and the core material is low, and there is no reinforcing structure formed by folding; the product rework rate caused by sealing failure and edge damage is high (about 2-3 times of the folding process), which indirectly increases the production cost and material loss. SUMMARY

[0005] The present application discloses a processing technology of a vacuum insulation panel with a special-shaped cut corner, to solve the problems of poor sealing, weak structure and poor process adaptability of the vacuum insulation panel with a special-shaped cut corner only subjected to ironing sealing without folding in the prior art.

[0006] In order to solve the above problems, the present application adopts the following technical scheme: A processing technology of a vacuum insulation panel with a special-shaped cut corner, comprising the following steps: S1, cutting a core material to obtain a special-shaped cut corner core material; S2, loading the special-shaped cut corner core material obtained in S1 into a film bag; S3, vacuumizing the film bag loaded with the special-shaped cut corner core material in S2 to obtain a vacuum insulation panel with a special-shaped cut corner semi-finished product; S4, ironing sealing the film bag corresponding to the special-shaped cut corner position of the vacuum insulation panel with a special-shaped cut corner semi-finished product obtained in S3 to obtain an ironing sealing area; S5, after the ironing sealing in S4 is cooled, extending the edge of the special-shaped cut corner to the ironing sealing area by a preset sealing width, so that the sealing width area formed by the preset sealing width in the ironing sealing area has the same shape as the special-shaped cut corner. S6, cutting the film bag in S4 along the line connecting the corner point of the sealing area and the center point of the edge of the sealing width area away from the special-shaped corner in S5 to cut the excess film bag in the sealing area into two parts except the sealing width area; S7, folding the two parts of the excess film bag cut in S6 to obtain the finished product of the special-shaped corner vacuum insulation board.

[0007] Further, the distance of the preset sealing width in S5 is 5-10mm.

[0008] Further, the shape of the special-shaped corner in S5 is L-shaped or stepped.

[0009] Further, the pressure of the vacuum packaging process in S3 is 5x10 -2 Pa, and the time of the vacuum packaging process is 15-20 minutes.

[0010] Further, after the film bag is vacuumized in S3, the opening of the film bag is heat sealed to obtain the semi-finished product of the special-shaped corner vacuum insulation board.

[0011] Further, the two parts of the excess film bag cut in S7 are folded in two directions towards the core material.

[0012] Further, the cutting in S1 and S6 is carried out by a numerical control laser cutting machine or a standardized cutting die.

[0013] Further, the special-shaped corner core material in S2 is located in the middle of the film bag, that is, the edges of the film bag correspond to the edges of the special-shaped corner core material with the same distance.

[0014] Further, the shape of the core material in S1 is square.

[0015] The technical scheme adopted by the present application can achieve the following beneficial effects: 1. The present application provides sufficient avoidance space for the excess film bag folding by setting the sealing width area, avoiding the stress between the core material and the film bag caused by mutual extrusion during folding, which can cause wrinkles, damage and other problems of the film bag, ensuring the integrity of the film bag and laying a foundation for subsequent good sealing effect. The sealing area formed in cooperation fully covers and seals the film bag corresponding to the special-shaped corner position, forming a three-sealing structure of "closed sealing + cutting avoidance + directional folding", which reduces the risk of vacuum leakage caused by film bag damage by more than 60% compared with the traditional process, improves the vacuum retention rate by more than 30% in long-term use, and significantly improves the sealing reliability of the special-shaped corner vacuum insulation board. 2. The notch formed after the corner is cut in this invention makes the core material and the film bag fit more tightly at the corner. The cutting operation before folding can be completed accurately along the preset cutting path, avoiding problems such as folding offset and corner deformation caused by the lack of clearance space in traditional processes. Actual tests show that after adopting this solution, the perpendicularity deviation at the corner of the irregularly shaped corner vacuum insulation board is controlled within ±0.5mm, and the overall dimensional accuracy is improved to ±1mm, which enhances the structural stability and dimensional accuracy of the irregularly shaped corner vacuum insulation board. 3. The processing technology of the irregularly shaped corner vacuum insulation panel of the present invention extends the service life of the irregularly shaped corner vacuum insulation panel, avoids membrane bag wrinkles and stress concentration, reduces the material fatigue aging rate, and, in conjunction with the reinforced sealing structure, extends the service life of the irregularly shaped corner vacuum insulation panel from 8-10 years of traditional process to more than 15 years. 4. This invention improves the performance of irregularly shaped corner vacuum insulation panels in terms of sealing, structure, process and lifespan through the design of "cutting-hot sealing-folding". It solves the defects of existing processes and has significant practical and economic value. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the irregularly shaped chamfered vacuum insulation panel semi-finished product in step S5 of some embodiments of this application; Figure 2 This is a schematic diagram of the structure of the irregularly shaped chamfered vacuum insulation panel semi-finished product in step S6 of some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the irregularly shaped chamfered vacuum insulation panel semi-finished product in step S7 of some embodiments of this application.

[0018] In the picture: 100-Irregularly shaped chamfered core material; 200-film bag; 300 - Hot-sealed area; 400-width sealed area. Detailed Implementation

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0020] The terms "first", "second", "third" and the like in the specification and claims of the present application are used to distinguish similar objects, not to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", "third" and the like are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0021] The inventive concept of the present application is described as follows: At present, for the vacuum insulation board with irregular cut corner at the edge position, the typical processing method in the industry is: after the vacuum insulation board is completed vacuum packaging, the irregular cut corner edge part is directly subjected to sealing treatment (the packaging film bag of the area is sealed by hot melting through hot pressing equipment), forming a sealing area; after the sealing is cooled, the excess film bag beyond the preset size at the irregular cut corner is cut and removed by cutting tool, the whole process does not go through the edge folding step, and finally the plate body structure with irregular cut corner is formed.

[0022] This processing method only forms a sealing area by sealing, the sealing path is short and there is no redundant protection structure, and external air and water vapor can easily penetrate into the plate body through the micro cracks (such as local unsealed area caused by uneven hot pressing, cracks generated by film bag heat shrinkage) of the sealing edge; especially at the inflection point of the irregular cut corner (such as rectangular cut corner, the edge corner of the vacuum insulation board is L-shaped, and the inflection point is the right angle of the L-shaped), because of the stress concentration of the film bag, sealing failure is more likely to occur after sealing, the thermal conductivity coefficient is significantly increased, and the heat preservation performance is greatly attenuated.

[0023] The bonding strength of the cut and shaped corner edge film bag and the core material is low, and there is no reinforcing structure formed by the folding edge. During transportation, installation or subsequent processing, when the corner is collided, rubbed or bent, the film bag is easily damaged, and the cutting parameters (such as tool angle and pressure) need to be adjusted separately after the sealing process, which prolongs the production rhythm (the processing time of a single plate is 20%-30% higher than that of the folding edge process). In addition, the product rework rate caused by sealing failure and edge damage is high (about 2-3 times of the folding edge process), which indirectly increases the production cost and material loss.

[0024] The existing processing method for the cut and shaped corner vacuum insulation board has obvious deficiencies in sealing reliability, structural stability, installation adaptability and production economy. Based on this, the inventors provide a processing method for a cut and shaped corner vacuum insulation board, which improves the sealing reliability, structural stability, installation adaptability and economic practicality of the cut and shaped corner vacuum insulation board by reserving a sealing width distance at the cut and shaped corner position and performing a folding edge operation.

[0025] The processing method for a cut and shaped corner vacuum insulation board provided by the present application will be described in detail below in combination with the accompanying drawings Figures 1 to 3 and specific embodiments and application scenarios.

[0026] Referring to Figures 1 to 3 A processing method for a cut and shaped corner vacuum insulation board, comprising the following steps: Referring to Figure 1 S1, cutting a core material to obtain a cut and shaped corner core material 100; Referring to Figure 1 In this embodiment, the shape of the core material is a square. Through this setting, the four right-angle edges can be used as positioning references for the cutting device, and the positioning error of the cut and shaped corner position can be controlled within ±0.1mm, which is much better than the ±0.5mm error of non-square core materials (such as circular and triangular core materials). The cut and shaped corner path of the square core material can be quickly programmed by offsetting along the square edge line, without complex curve fitting. At the same time, the batch cutting of the square core material can realize array processing, and the processing efficiency is improved by 40% compared with non-square core materials, and the size consistency of the cut and shaped corners in the same batch reaches 99.5%. In addition, the basic cutting waste can be reduced, and the material utilization rate can be improved. The waste generated by cutting the cut and shaped corner of the square core material is still in a regular shape and can be used to produce small cut and shaped boards. The waste of non-square core materials is mostly irregular fragments and cannot be reused, which further improves the overall material utilization rate. The present application mainly cuts the corners of the square core material.

[0027] Referring to Figure 1 In this embodiment, the shape of the cut and shaped corner is L-shaped or stepped.

[0028] Specifically, the L-shaped cut corner reduces the edge linear heat transfer rate by about 35% by converting the traditional planar edge into a double-planar structure intersecting perpendicularly, forming a 90° bend at the corner according to the thermal bridge effect theory model; the corner of the stepped cut corner is also set with a 90° bend, reducing the edge linear heat transfer rate.

[0029] Referring to Figure 1 In this embodiment, the shape of the special-shaped cut corner is preferably L-shaped.

[0030] Referring to Figure 1 In this embodiment, the core material is cut by a numerical control laser cutting machine or a standardized cutting die.

[0031] Specifically, the positioning accuracy of the numerical control laser cutting machine can reach ±0.1mm, and the cutting tolerance is ≤0.05mm, which can accurately reproduce the special-shaped cut corner in the design drawing. At the same time, laser cutting is a non-contact cutting method that does not apply mechanical pressure to the core material, avoiding cracks and slagging of the core material and ensuring the thermal insulation performance of the core material. It can be linked with the MES production system to automatically read design parameters, position materials, and complete cutting without manual adjustment throughout the process. The cutting data can be recorded in real time, which is convenient for quality tracing, reduces the quality fluctuation range of the cutting process from ±8% to ±1.5% by manual operation; the cutting accuracy of the standardized cutting die can reach ±0.2mm, which is slightly lower than the laser cutting, but through the fixed profile of the die cavity, it can realize one-time positioning and batch cutting, ensuring that the special-shaped structures of products in the same batch are completely consistent, avoiding sealing risks such as incomplete coverage of the film bag 200 during subsequent heat sealing due to size differences; both cutting devices are suitable for the characteristics of the core material, reducing the structural damage to the core material. It only needs to put the material into the positioning clamp manually, and the equipment automatically completes the cutting. The operator does not need professional skill training, and the size and angle of each cutting are completely consistent, avoiding quality differences caused by different operation habits of workers; cutting through two kinds of cutting equipment can control the flatness of the cutting surface of the core material within 0.1mm, reducing the film bag 200 sticking defects caused by irregular core material during subsequent packaging.

[0032] Referring to Figure 1 S2, the special-shaped cut corner core material 100 obtained in S1 is loaded into the film bag 200; Referring to Figure 1 In this embodiment, the special-shaped cut corner core material 100 is located in the middle of the film bag 200, that is, the edges of each side of the film bag 200 correspond to the edges of each side of the special-shaped cut corner core material 100 with the same distance.

[0033] Specifically, the square core material can be quickly centered by diagonal positioning. For example, the core material has a length of 250 mm and a width of 250 mm, and the film bag 200 has a length of 300 mm and a width of 300 mm. When the core material is centered, each side of the core material is 50 mm away from the edge of the film bag 200, so that the excess of each side of the film bag 200 is easy to control. If the core material is offset, a larger size of the film bag 200 (for example, 300*300 mm instead of 250*250 mm) needs to be selected to ensure the local excess, and the utilization rate of the film material per square meter is reduced from 85% to 70%. When the core material is centered, the size of the film bag 200 can be accurately calculated, the utilization rate of the film material is increased to more than 92%, and the cost of the film material for a single product is reduced by 15%. The offset of the core material can easily cause the subsequent process to be scrapped (for example, insufficient heat sealing and cutting deviation), and the scrap rate is about 10%. When the core material is centered, each process can be stably landed, the scrap rate is reduced, and the loss of scrap is reduced.

[0034] Referring to Figure 1 , S3, vacuumizing the film bag 200 filled with the profiled cut corner core material 100 in S2 to obtain a profiled cut corner vacuum insulation panel semi-finished product; Specifically, the mechanical structure of the square core material is more stable. When vacuumizing, the extrusion stress of the film bag 200 on the core material can be uniformly dispersed to four sides, and the stress deviation is less than or equal to 5%, so that the edge collapse of the core material caused by stress concentration is avoided. The square structure can reduce the breakage rate during vacuumizing and ensure the uniformity of the thermal insulation performance of the core material. The profiled cut corner core material 100 is located in the middle of the film bag 200, so that when vacuumizing, the film bag 200 needs to be tightly attached to the profiled contour (such as L-shaped or stepped) of the core material. If the core material is offset, the film bag 200 in the area with too little excess of a side will be wrinkled due to excessive stretching. If the excess of a side is too much, redundant film material will be left, which will cause uneven vacuum degree. When the core material is centered, the excess of each side is uniform, the film bag 200 can uniformly shrink during vacuumizing, and the attachment degree is more than 98%. The wrinkle rate is reduced from 8% to less than 1% when the core material is offset, so that the vacuum degree of the semi-finished product is stable.

[0035] Referring to Figure 1 In this embodiment, the pressure of the vacuumizing and packaging process is 5*10 -2 Pa, and the time of the vacuumizing and packaging process is 15-20 minutes.

[0036] Specifically, when the vacuum degree is higher than 5*10 -2 Pa (i.e., the pressure is greater), the density of the residual gas molecules in the film bag 200 is too high, which can transfer heat through convection, resulting in that the thermal conductivity of the product breaks through 3 mW / (m*K) (far exceeds the industry core index of less than or equal to 2.5 mW / (m*K)). Although the thermal conductivity can be further reduced when the pressure is lower than the pressure (for example, 1*10 -2 Pa), the vacuum pump equipment needs to be upgraded, the cost is increased by more than 40%, and the requirement for the negative pressure strength of the film bag 200 is higher. In addition, when the pressure is 5*10 -2At the vacuum degree of Pa, the pressure difference between the inside and outside of the film bag 200 is in the safe stress interval, the film bag 200 will not be stretched too much due to too large pressure difference, and will not cause gas residue due to too small pressure difference; the edge angle, step and other structures of the special-shaped cut corner core material 100 will form a gas retention dead angle, if the vacuum extraction time is less than 15 minutes, the gas in the dead angle cannot be completely extracted, which will cause the vacuum degree to decrease after the product is used for 1-2 years, the thermal conductivity will increase by 50%, and the service life will be shortened to less than 8 years, 15 minutes can make the gas fully penetrate to the air outlet, if the vacuum extraction time is more than 20 minutes, on the one hand, the core material (especially the brittle material such as nano aerogel) will be compressed too much due to long time negative pressure, the pore structure will collapse, and the solid thermal conductivity will increase, which will cause the thermal conductivity to increase, on the other hand, the production rhythm will be lengthened, which cannot meet the industrialized batch demand; and during the 15-20 minute vacuum extraction process, the film bag 200 will gradually fit the contour of the special-shaped cut corner core material 100, forming a preformed shape, avoiding incomplete sealing due to wrinkles of the film bag 200 during subsequent sealing by heat.

[0037] Referring to Figure 1 In this embodiment, after the film bag 200 is vacuumed, the opening of the film bag 200 is heat sealed to obtain a special-shaped cut corner vacuum heat insulation plate semi-finished product.

[0038] Specifically, after the film bag 200 is vacuumed, the opening of the film bag 200 is immediately heat sealed, the heat sealing layer of the film bag 200 is melted by high temperature to form a continuous and dense sealing band, which completely blocks the external air from entering, avoids that the film bag 200 opening will quickly inhale air if the heat sealing is not timely, which will cause the vacuum degree to drop sharply, and the effect of the previous vacuum extraction process will be completely invalid; during the heat sealing process, the shrinkage force at the opening of the film bag 200 will slightly tighten the film bag 200, so that the core material and the film bag 200 inner wall are tightly fitted, and the cut corner edge of the core material and the corresponding position of the film bag 200 form a positioning reference; after heat sealing, the film bag 200 forms a closed cavity, and the overall contour of the semi-finished product is fixed, avoiding deformation of the film bag 200 in subsequent sealing, cutting and edge folding processes.

[0039] And a small amount of adsorbed gas may be left in the core material (such as glass fiber, aerogel), which is locked in the film bag 200 after heat sealing after vacuum extraction, and is gradually solidified by the adsorption characteristics of the core material itself, avoiding long-term attenuation of the vacuum degree caused by slow release.

[0040] Referring to Figure 1 S4, the film bag 200 corresponding to the special-shaped cut corner position of the special-shaped cut corner vacuum heat insulation plate semi-finished product obtained in S3 is completely sealed by heat sealing to obtain a heat sealing area 300; Specifically, the heat sealing area 300 includes the sealing width area 400 mentioned later, and the heat sealing area 300 is in the Figure 1The middle part refers to the area within the dashed line; the cut corner edge of the square core material (such as the L-shaped right angle edge) is a straight line, and a continuous and uniform sealing band can be formed during sealing; the special-shaped cut corner core material 100 is located in the middle part of the film bag 200, and the film bag 200 at the cut corner position is sealed in a targeted manner. If the core material is offset, the film bag 200 on one side corresponding to the cut corner has insufficient excess, which can cause the sealing area 300 to fail to cover the cut corner edge, forming a sealing gap. If the excess is too much, the sealing area will be increased, which will waste energy and be prone to uneven sealing. The design of the center makes each direction of the cut corner have sufficient excess, and a sealing band with the same shape as the cut corner can be accurately formed during sealing, with a width error of ≤0.5mm, which ensures that each cut corner edge is effectively sealed, and the sealing qualification rate is improved from 85% to 99%. By initially sealing the cut corner position, a basic sealing layer is formed.

[0041] Referring to Figure 1 , S5, after the sealing in S4 is cooled, the edge of the special-shaped cut corner extends to the sealing area 300 by a distance of a preset sealing width, so that the sealing width area 400 formed by the preset sealing width in the sealing area 300 has the same shape as the special-shaped cut corner; Specifically, the preset sealing width is a preset closed width, specifically, the vertical distance between the center point of the sealing width area 400 away from the edge of the special-shaped cut corner and the core material provides sufficient space for the subsequent folding of the excess film bag 200, avoiding the problem that the film bag 200 is wrinkled, damaged, etc. due to stress between the core material and the film bag 200 caused by mutual extrusion during folding, ensuring the integrity of the film bag 200, and thereby laying a foundation for subsequent good sealing effect.

[0042] Referring to Figure 1 In this embodiment, the distance of the preset sealing width is 5-10mm.

[0043] Specifically, the preset sealing width of 5-10mm can disperse local stress during installation or transportation to a larger area by expanding the sealing area, avoiding sealing failure caused by stress concentration, and maintaining good sealing reliability; the sealing width of 5-10mm can extend the heat conduction path at the cut corner position to 1.5-2 times of the traditional process, so that the edge thermal conductivity is stably controlled at 5-8mW / (m·K).

[0044] Referring to Figure 2 , S6, cutting the line between the corner point of the film bag 200 corresponding to the sealing area 300 in S4 and the center point of the sealing width area 400 away from the edge of the special-shaped cut corner in S5 to cut the excess film bag 200 in the sealing area 300 except the sealing width area 400 into two parts, facilitating the subsequent folding; Specifically, the sealing wide area 400 can provide a safety margin for cutting to avoid damaging the effective sealing area; in this embodiment, the film bag 200 is cut along the diagonal line between the corner point corresponding to the sealing area 300 and the center point of the edge of the sealing wide area 400 away from the special-shaped cutting corner (i.e., the corner of the L-shaped corner).

[0045] Referring to Figure 2 In this embodiment, the line is cut by a numerical control laser cutting machine or a standardized cutting die.

[0046] Specifically, both cutting devices are adapted to the characteristics of the core material, reducing structural damage to the core material, and can guarantee the sealing basis of the film bag 200 and avoid edge failure.

[0047] Referring to Figure 3 S7, fold the two parts of the excess film bag 200 cut in S6 to obtain the finished product of the special-shaped cutting corner vacuum insulation panel.

[0048] Specifically, only the excess film bag 200 is folded when folding, and the sealing wide area 400 is not folded; when folding, it can be folded accurately along a straight line, and the folding angle error is ≤1°, avoiding the sealing rupture and folding wrinkles caused by the curved edges of the non-square core material, further guaranteeing the edge sealing and thermal insulation performance; by accurately cutting the excess film bag 200 and folding, the edge tensile strength is improved, and external stress is effectively dispersed, avoiding film bag 200 rupture caused by collision during transportation or installation; the set sealing wide area 400 can improve the structural strength after folding.

[0049] Referring to Figure 3 In this embodiment, the two parts of the excess film bag 200 cut are folded in two directions towards the core material.

[0050] Specifically, the two directions in the above are two perpendicular directions, and the excess film bag 200 covers the sealing wide area 400 and the film bag 200 adsorbed on the surface of the core material, improving the edge impact and tensile resistance; the folding direction completely corresponds to the profile of the core material, which can tightly press the film bag 200 in the special-shaped gap of the core material, avoiding the formation of a slow air leakage channel by air remaining in the gap; and the coverage range of the two folding directions exactly overlaps with the sealing wide area 400, forming a double-sealing structure of the sealing layer + folding layer after folding, the sealing layer is responsible for the basic vacuum locking, and the folding layer is responsible for completing the sealing short board of the special-shaped gap, reducing the sealing failure probability from 1% / year to 0.1% / year, and further extending the product vacuum life from 15 years to more than 20 years.

[0051] The special-shaped cut corner core material 100 is located in the middle of the film bag 200, if the core material is offset, the film bag 200 is 3mm too much on one side (not enough for folding), and after folding, the multi-layer protection cannot be formed, and the edge is easy to crack; the film bag 200 is 15mm too much on one side (excessive), and after folding, the edge will appear to be stacked and protrude, which affects the installation and is easy to produce a gap, and the center design makes the film bag 200 on each side be suitable for the folding requirement, and after folding, the edge layer is uniformly two layers, and the impact resistance is consistent, and there is no local sealing short board.

[0052] Compared with the no folding treatment mode in the traditional process, the process avoids the fatigue cracking of the film bag 200 material caused by excessive stretching through the continuous cutting and local folding.

[0053] In summary, the application provides sufficient avoidance space for the folding of the excess film bag 200 by setting the sealing width area 400, avoids the stress between the core material and the film bag 200 caused by mutual extrusion during folding, and prevents the film bag 200 from wrinkling, breaking and other problems, thereby ensuring the integrity of the film bag 200 and laying a foundation for subsequent good sealing effect; the formed sealing area 300 fully covers and seals the film bag 200 corresponding to the special-shaped cut corner position, forms a three-sealing structure of "closed sealing + cutting avoidance + directional folding", reduces the vacuum leakage risk caused by damage to the film bag 200 by more than 60% compared with the traditional process, improves the vacuum retention rate by more than 30% in long-term use, and significantly improves the sealing reliability of the special-shaped cut corner vacuum insulation board; The gap formed after cutting the corner makes the core material and the film bag 200 at the corner fit more closely, and the cutting operation before folding can be accurately completed along the preset cutting path, avoiding the problems of folding offset and corner deformation caused by the lack of avoidance space in the traditional process; the actual measurement shows that the perpendicularity deviation of the special-shaped corner corner of the special-shaped corner vacuum insulation board is controlled within ±0.5mm after using the scheme, the overall size accuracy is improved to ±1mm, and the structural stability and size accuracy of the special-shaped corner vacuum insulation board are enhanced; The processing process of the special-shaped corner vacuum insulation board of the application prolongs the service life of the special-shaped corner vacuum insulation board, avoids the wrinkling and stress concentration of the film bag 200, reduces the material fatigue aging speed, and cooperates with the reinforced sealing structure, so that the service life of the special-shaped corner vacuum insulation board is prolonged from 8-10 years of the traditional process to more than 15 years; The application improves the performance of the special-shaped corner vacuum insulation board from the aspects of sealing, structure, process and life by the design of "cutting-sealing-folding", solves the defects of the existing process, and has significant practical value and economic value.

[0054] It should be noted that, as used herein, the terms "includes," "including," or "has" are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements is not limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0055] Furthermore, it is to be understood that the scope of the present application is not limited to the particular details of the methods and apparatus described herein, and that various modifications can be made without departing from the scope of the application. For example, although the method steps are described in a particular order, alternative embodiments can perform the method steps in a different order, or perform different steps, or perform the method steps in parallel, or add, remove, or combine steps. Furthermore, features described in relation to one example can be combined with features described in relation to other examples.

[0056] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A processing method of a profiled corner-cut vacuum insulation panel, characterized by, The method comprises the following steps: S1, cutting corners of a core material to obtain a profiled corner core material; S2, loading the profiled corner core material obtained in S1 into a film bag; S3, vacuumizing the film bag loaded with the profiled corner core material in S2 to obtain a profiled corner vacuum insulation board semi-product; S4, sealing the film bag corresponding to the profiled corner position of the profiled corner vacuum insulation board semi-product obtained in S3 to obtain a sealing area; S5, after the sealing in S4 is cooled, extending the edge of the profiled corner to the sealing area by a preset sealing width, so that the sealing width area formed in the sealing area has the same shape as the profiled corner; S6, cutting the line between the corner point of the film bag corresponding to the sealing area in S4 and the center point of the edge of the sealing width area away from the profiled corner in S5 to cut the excess film bag in the sealing area into two parts; S7, folding the two parts of the excess film bag cut in S6 to obtain a profiled corner vacuum insulation board product.

2. The processing method of the profiled corner-cut vacuum insulation panel according to claim 1, characterized in that, The distance of the preset sealing width in S5 is 5-10 mm.

3. The processing method of the profiled corner-cut vacuum insulation panel according to claim 1, characterized in that, The shape of the profiled corner in S5 is L-shaped or stepped.

4. The processing method of the profiled corner-cut vacuum insulation panel according to claim 1, characterized in that, The pressure of the vacuum packaging process in S3 is 5x10 -2 Pa, and the time of the vacuum packaging process is 15-20 minutes.

5. The processing method of the profiled corner-cut vacuum insulation panel according to claim 4, characterized in that, After the film bag is vacuumized in S3, the opening of the film bag is heat sealed to obtain a profiled corner vacuum insulation board semi-product.

6. The processing method of the profiled corner-cut vacuum insulation panel according to claim 1, wherein, The two parts of the excess film bag cut in S7 are folded in two directions respectively towards the core material.

7. The processing method of the profiled corner-cut vacuum insulation panel according to claim 1, wherein, The cutting in S1 and S6 is performed by a numerical control laser cutting machine or a standardized cutting die.

8. The processing method of the profiled corner-cut vacuum insulation panel according to claim 1, wherein, The profiled corner core material in S2 is located in the middle of the film bag, that is, the edge distance of each side of the film bag corresponding to the edge of each side of the profiled corner core material is the same.

9. The processing method of the profiled corner-cut vacuum insulation panel according to claim 1, wherein, The shape of the core material in S1 is square.

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