Mineral wool sandwich board PIR edge sealing production system and production process

Abstract

The invention relates to a mineral wool sandwich board PIR edge sealing production system and production process. The mineral wool sandwich board PIR edge sealing production system comprises a white material storage tank, a pentane storage tank, an on-line cutting precision mixer, a transition tank, a black material storage tank and a mixing head. Due to the fact that the using amount of edge sealing materials is small, the mixing effect of polyester and pentane is affected, and edge sealing sandwich boards with high fire resistance cannot be manufactured, the system cuts, extrudes, impacts and disperses white materials and pentane in the mixer by increasing flow feeding, and the mixing effect is improved. Due to the fact that the premixing white material amount consumed by the mixing head is small, discharging of the mixing head cannot be interrupted, and the output of the premixing white material is different from the premixing white material amount consumed by the mixing head, in order to achieve flow balance of the premixing white material and the premixing white material amount consumed by the mixing head, flow balance is achieved by increasing the premixing white material flow + intermittent feeding = small flow of the mixing head + continuous discharging. The middle transfer transition device caches the premixed white material to solve the problem of uninterrupted discharging of the mixing head so as to achieve continuous production, and the major problem that online mixing foaming cannot be achieved due to small flow of polyester and pentane is successfully solved.

Description

Technical Field

[0001] The invention relates to the technical field of sandwich panels, and in particular to a PIR edge banding production system and a production process for a mineral wool sandwich panel. Background Art

[0002] At present, the industry is very troubled by the polyurethane edge sealing foam products of rock wool sandwich panels. Originally, 141B was used as the foaming agent. The miscibility of 141B foaming agent and polyester is relatively good. With the approaching of the final ban time of 141B under the United Nations Montreal Protocol (banned from January 1, 2026), replacing 141B foaming agent is an urgent top priority. The current alternative methods are: 1) Water foaming (easy to shrink, will powder, low strength requires high foam density to compensate, and cannot meet the quality requirements of sandwich panels); 2) 245 foaming: 245 is not a very environmentally friendly material, with a high greenhouse effect. It is also a material that the United Nations is preparing to eliminate. It can be used temporarily, but the price is extremely high, RMB 40,000 / ton, which is simply unbearable, and almost no one uses this material; 3) LBA foaming agent, the current price is 60,000 / ton, the cost is extremely high, and no one in the industry will use this material

[0003] Currently, the more economical alternative is polyether + cyclopentane, which can barely be produced, but it cannot produce highly flame-retardant PIR foam. It can only be used to make sandwich panels with a fire-resistant grade of B3. In addition, due to the high boiling point of cyclopentane, which evaporates at 49°C, the pressure of the closed cells in the core of the sandwich panel exposed to the atmosphere is reduced (the outdoor air temperature is usually lower than 49°C). As a result, the sandwich panel is flattened by atmospheric pressure (the thickness direction of the sandwich panel will shrink severely). In addition, the strength of polyether is originally low. The combination of the two will cause the shrinkage of the sandwich panel to be very serious.

[0004] The polyurethane edge banding of the rock wool sandwich panel is on both sides, and the rock wool in the middle will not shrink, which will cause the board surface to be uneven and collapse on both sides, seriously affecting the quality of the wall. This problem cannot be solved in the industry at present.

[0005] In the building insulation sandwich panel industry, rock wool and glass wool sandwich panels are widely used as a thermal insulation and fireproof building material. However, since mineral wool is an inorganic material that easily absorbs water, the strength of the board will be greatly reduced after absorbing water, the insulation effect will be greatly reduced, the life of the core material will be reduced, the inner paint layer of the steel plate will be corroded faster, and the overall life of the sandwich panel will be shortened. The industry usually uses polyurethane edge sealing on the side of the sandwich panel to improve the strength and waterproof performance of the board. Although the edge sealing solves the waterproof problem, it brings the serious disadvantage of not being fireproof, resulting in two safety hazards of this rock wool polyurethane edge sealing sandwich panel. The first is that when it is attacked by open flames, the wall will collapse immediately after the polyurethane edge sealing node is burned down, for example Figure 1As shown in the photo, a fire broke out at Chaofeng Company in Jintan, Changzhou on November 5, 2024. The polyurethane edge sealing part of its rock wool polyurethane edge sealing sandwich panel is a foamed body composed of 141B and polyether, with a fire protection level of B3. After being attacked by fire, the edge sealing was quickly burned and could not play the role of connecting and supporting the sandwich panel, causing the wall to collapse; the second is that during construction, sparks from electric welding and grinding wheel cutting were ignited and caused fire, for example Figure 2 The photo shows a fire that occurred during the construction of a temporary construction project at a subway entrance in Jinan. This is an edge-sealed foam composed of polyether and cyclopentane, and the fire resistance level is also B3. This is a serious safety and quality hazard of the product at present, because its foam edge sealing is not flame retardant and will be ignited and cause fire when exposed to various open flames.

[0006] In the process of producing PIR polyurethane edge-sealed rock wool sandwich panels, since polyester and pentane are two completely incompatible materials, the current mixing process path on the market is: using a reactor tank for mixing. The working principle is to weigh the white polyester and pentane in proportion, transport them to the reactor, and drive the materials to mix by rotating the propeller in the middle of the reactor tank. In this mixing process, the two materials are not quickly cut, dispersed, and collided, and belong to macroscopic mixing. After this mixing stops, stratification will occur immediately, and pentane hazardous chemicals will overflow from the mixture. Since the density of pentane is lower than that of white polyester, it will float on the surface of polyester, causing serious safety hazards, and PIR edge-sealed sandwich panels cannot be produced. At present, only polyether and cyclopentane can be used for mixing. The reactor can barely meet the mixing requirements, but polyether cannot produce highly flame-retardant PIR foam. It can only make ordinary non-fireproof edge-sealed foam.

[0007] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0008] Aiming at the process technology that has not been overcome in the current industry, the embodiment of the present invention discloses a mineral wool sandwich panel PIR edge banding production system and production process to solve the key problem that polyester and pentane cannot be mixed online in PIR polyurethane edge banding.

[0009] The technical solution adopted by the present invention is as follows:

[0010] A mineral wool sandwich panel PIR edge banding production system, the production system comprises a white material storage tank, a pentane storage tank, an online cutting precision mixer, a transfer transition device, a black material storage tank and a mixing head; the white material storage tank is connected to the first feed end of the online cutting precision mixer through a first pipeline, a white material metering pump is arranged on the first pipeline, and the white material metering pump conveys white material to the online cutting precision mixer; the pentane storage tank is connected to the second feed end of the online cutting precision mixer through a second pipeline, a pentane metering pump is arranged on the second pipeline, and the pentane metering pump conveys pentane to the online cutting precision mixer; the online cutting precision mixer mixes the white material with the pentane by cutting A premixed white material is obtained, and the discharge end of the online cutting precision mixer is connected to the transfer transition device, and the online cutting precision mixer outputs the premixed white material to the transfer transition device; the transfer transition device is connected to the mixing head through a third pipeline, and a premixed white material metering pump is arranged on the third pipeline, and the premixed white material metering pump continuously conveys the premixed white material to the mixing head, and the feeding speed of the transfer transition device is greater than the discharge speed of the premixed white material metering pump; the black material storage tank is connected to the mixing head through a fourth pipeline, and a black material metering pump is arranged on the fourth pipeline, and the black material metering pump continuously conveys black material to the mixing head, and the premixed white material and the black material collide and mix in the mixing head.

[0011] Its further technical solution is that the online cutting precision mixer is a dynamic mixer, and the dynamic mixer performs dynamic high-shear mixing and emulsification. The dynamic mixer includes a motor, a shell, a fixed blade arranged in the shell, a rotating blade matched with the fixed blade, a shaft connecting the rotating blade and the output end of the motor, and a mechanical seal sleeved on the outside of the shaft. The mechanical seal is sealed and connected to the end face of the shell. When the white material and pentane flow into the flow channel between the fixed blade and the rotating blade through the pressure of the pump, the output of the motor causes the rotating blade to rotate at a high speed of 3 to 20 m / s. The gap of 0.1 to 0.5 mm between the rotating blade and the fixed blade shears each other, and the two different phase liquids of white material and pentane that repel each other are instantly blasted, cut, dispersed, and collided to reach nano-level fine particles and then recombine to form a stable continuous phase liquid.

[0012] Its further technical solution is that the online cutting precision mixer is a static mixer, which is tubular, and a cutting blade with a certain angle spiral is fixed in the tube. When the liquid flows, it is gradually cut and mixed by the cutting blade. The cutting blade is in a fluid spiral shape to reduce the resistance when the liquid passes through and make the liquid rotate during the movement along the length of the tube body to improve the mixing effect. The cutting blade is arranged from small to large in number from the inlet to the outlet, and the pores are from large to small, and from thick to thin. The cutting blade cuts the white material and pentane into 2 and 4 strands from the beginning of feeding to the mixed liquid cut into thousands of strands at the discharge point to meet the pre-mixing process requirements of PIR foam. The diameter of the mixing tube, according to the flow rate of polyester and pentane, the flow rate in the tube must reach more than 3m / s. The flow rate of pentane and polyester reaches more than 3m / s in the tube and after colliding with the blade, a relatively good mixed liquid will be obtained. This mixed liquid generally does not have any precipitation within 24 hours, which can fully meet the edge sealing foaming production of PIR.

[0013] Its further technical solution is that the transfer transition device is a storage tank with a capacity of 5L to 20L. The feed end of the storage tank is connected to an online cutting precision mixer through a pipeline, and the discharge end of the storage tank is connected to a premixed white material metering pump through a third pipeline. A liquid level sensor is arranged in the storage tank, and the lower limit of the liquid level sensor is the start of feeding, and the upper limit of the liquid level sensor is the stop of feeding.

[0014] Its further technical solution is that the transfer transition device includes a movable container, a conveying device and a storage tank. The dynamic mixer outputs the premixed white material and inputs it into the movable container. The conveying device transports the movable container to a sandwich panel production line at a different location and loads the material into the storage tank. The storage tank is connected to a third pipeline. The capacity of the movable container is generally 200kg to 1t. The premixed white material metering pump continuously transports the premixed white material in the storage tank to the mixing head through the third pipeline.

[0015] Its further technical solution is that the ratio of white material and pentane input into the online cutting precision mixer is 100:, and the pentane is n-pentane or cyclopentane or cycloisopentane or n-isopentane; the mixing head is a low-pressure spiral cutting blade mixing tube, and the compressed air pressure input into the mixing tube is 0.5Bar~7Bar; the black material and premixed white material in the mixing tube rely on the rapid flow of gas to drive the mixed white material and black material to be quickly cut by the spiral blade to achieve the process mixing requirements; the mixing head can also adopt high-pressure mixing, and the black material and the premixed white material are input into the mixing head after the pressure is established by their respective high-pressure metering pumps, and then their respective high-pressure switch valves are opened instantly and simultaneously, and the two streams of material collide with each other at high pressure in the mixing chamber of the mixing head to achieve high-pressure mixing, and the high-pressure collision pressure in the mixing tube is 100~150Bar, and high-pressure mixing can fully achieve sufficient mixing and emulsification.

[0016] The production process of PIR edge banding of mineral wool sandwich panels includes the following steps:

[0017] In order to obtain emulsified mixed liquid, the process of increasing premixed white material + intermittent feeding = small flow rate of mixing head + continuous discharge is adopted to achieve flow balance. The intermediate transfer transition device caches the premixed white material to solve the problem of uninterrupted discharge of the mixing head to achieve continuous production, successfully overcoming the major problem of online mixing and foaming due to the small flow rate of polyester and pentane;

[0018] Feeding: The white material metering pump intermittently transports the white material in the white material storage tank to the online cutting precision mixer, and the pentane metering pump intermittently transports the pentane in the pentane storage tank to the online cutting precision mixer;

[0019] Large flow premixing: the online cutting precision mixer cuts and mixes the white material and pentane to obtain the premixed white material;

[0020] Premixed white material buffer: The transfer transition device receives the premixed white material intermittently input from the online cutting precision mixer;

[0021] Small flow continuous mixing at the mixing head: the premixed white material metering pump continuously transports the premixed white material in the transfer transition device to the white material chamber of the mixing head, and the feeding speed of the transfer transition device is greater than the discharging speed of the premixed white material metering pump; the black material metering pump continuously transports the black material in the black material storage tank to the black material chamber of the mixing head, and the premixed white material and the black material pass through their respective feeding chambers and then flow into the mixing chamber to collide and then enter the mixing tube for mixing to obtain PIR polyurethane edge sealing foam.

[0022] A further technical solution is that the step of the transfer transition device receiving the premixed white material intermittently input from the online cutting precision mixer comprises:

[0023] At the same time, open the white material metering pump, pentane metering pump and online cutting precision mixer to replenish the storage tank, and close them at the same time after the liquid level sensor detects that the liquid level of the premixed white material in the storage tank rises to the upper limit position, so as to keep the supplied material ratio completely consistent;

[0024] The mixing head works non-stop, and with continuous material supply, the material in the storage tank is gradually consumed. After the liquid level sensor detects that the liquid level of the premixed white material in the storage tank has dropped to the lower limit, it sends out a refill signal, and then starts the white material metering pump, pentane metering pump and online cutting precision mixer at the same time to refill the storage tank, completing a cycle.

[0025] A further technical solution is that the step of the premixed white material metering pump conveying the premixed white material in the transfer transition device to the white material chamber of the mixing head comprises:

[0026] The premixed white material metering pump transports the premixed white material in the storage tank to the white material chamber of the mixing head through the third pipeline.

[0027] A further technical solution is that the step of the premixed white material metering pump conveying the premixed white material in the transfer transition device to the white material chamber of the mixing head comprises:

[0028] The premixed white material output from the dynamic mixer is loaded into a movable container;

[0029] The conveying device transfers the movable container to a sandwich panel production line at a different location and loads the material into a storage tank. The storage tank is connected to the third pipeline. The premixed white material metering pump continuously conveys the premixed white material in the storage tank to the mixing head through the third pipeline.

[0030] The beneficial effects of the embodiments of the present invention are as follows:

[0031] (I) The mineral wool sandwich panel PIR edge banding production system of the present invention comprises a white material storage tank, a pentane storage tank, an online cutting precision mixer, a transfer transition device, a black material storage tank and a mixing head. Since the amount of edge banding material used is very small, the mixing effect of polyester and pentane is affected, and a highly fire-resistant edge banding sandwich panel cannot be made. The present invention fully squeezes and impacts the white material and pentane through a large flow rate feed to achieve a PIR foaming mixing process. Since the amount of premixed white material used in the mixing head is relatively small, and the discharging of the mixing head cannot be interrupted during continuous foaming production, the output of the premixed white material in the front stage is different from the amount of premixed white material consumed by the final mixing head in the rear stage. In order to achieve a balance between the two, the premixed white material in the front stage is fed through large flow + intermittent feeding, and the small flow rate in the rear stage is continuously discharged to achieve a balance between the two. The intermediate transfer transition device plays a connecting role. After the PIR rock wool sandwich panel is sealed, the fire protection of the sandwich panel is improved by two levels, directly from B1 to B3, which prevents the sandwich panel from being ignited during the construction process and causing a vicious safety accident. When encountering a fire, the fire protection time of the wall is longer, which buys time for rescue, escape, and rescue of property, and greatly reduces the harm of the fire.

[0032] (ii) Furthermore, because pentane is a hazardous chemical, when the mixture ratio of pentane vapor leaking and air reaches 1.5% to 78%, it will explode when exposed to open flames or high temperatures above 800°C. Therefore, it is very important to limit the volatilization of pentane gas during production, which greatly improves the safety factor of the production process.

[0033] 2.1 Elimination of hazardous gases at the foaming site: Mixing process path 1 of the present invention: The online cutting precision mixer adopts a dynamic mixer, and the rotating blade and the fixed blade shear each other at a rotation speed of 10-20m / s and a gap of 0.1-0.5mm. The white material and pentane, two different phase liquids, are instantly blasted, cut, dispersed, and collided to reach nano-scale particles and then recombined to form a stable continuous phase emulsion, so that the polyester nanoparticles wrap the pentane, and the pentane nano-fine particles are dissolved in the polyester. In this way, when the material discharged from the mixing head is exposed to the air and injected into the continuous plate moving cavity, the pentane is not easy to overflow and there is almost no leakage;

[0034] The second mixing process path of the present invention: the online cutting precision mixer adopts the static mixing tube process, and the inner diameter of the mixing tube is 10mm. After the flow rate is increased, the flow rate of the mixture of white material and pentane through the static mixer increases accordingly, and the impact speed of the cutting blade arranged between the material and the mixing tube also increases accordingly. Generally, the fluid speed and the impact force of the blade should reach more than 3m / s. In this way, a premixed white material that will not precipitate in a short time can be obtained, ensuring that the production process is safe. The polyester and pentane are fully mixed and wrapped with each other to meet the PIR production process.

[0035] 2.2 Save the cost of raw materials and equipment investment: This is not only safe and guaranteed, but also reduces the volatilization emission of pentane and saves raw materials. In the conventional reactor mixing process, a large amount of organic waste gas will volatilize after the mixture is spit out of the mixing head. According to environmental protection requirements, carbon adsorption, catalytic combustion or RTO incineration treatment can be used, which requires a lot of investment. The present invention greatly limits the volatilization of organic waste gas, greatly saves the cost of organic waste gas treatment and equipment investment, and the raw materials do not volatilize, saving raw materials.

[0036] 2.3 Since polyester raw materials are used, the functionality of polyester is high, and the resulting PIR foam has high compression strength and will not shrink. Since the sandwich panel is made of mineral wool in the middle, it will not shrink, while the edge sealing on the market now uses PUR foam, which will shrink. In this way, on the cross section of the sandwich panel, the rock wool section in the core material is high, while the PUR edge sealing section is collapsed. This phenomenon cannot be solved at present. The present invention uses PIR foam, which has high foam strength and is not easy to shrink. The manufactured sandwich panel rock wool section and PIR polyurethane edge sealing section are flat.

[0037] 2.4 Investment in foaming equipment: Generally, sandwich panel production lines are capable of producing PIR high-flow all-polyurethane core materials, but another set of foaming equipment is required for producing rock wool core polyurethane edge sealing (equipment with a polyether system as raw material). After adopting the present invention, the set of foaming equipment dedicated to edge sealing can be greatly reduced, and only the output pump group at the rear section is required. The equipment at the front section can be shared with the original foaming machine, which greatly saves equipment investment.

[0038] 2.5 Procurement of raw materials: PIR polyurethane sandwich panels and rock wool polyurethane edge-sealed sandwich panels can generally be produced on one production line, and these two materials are different systems, the former is a PIR system, and the latter is a PUR system. After using the present invention, sandwich panel manufacturing companies no longer need to purchase two chemical materials, but only need to purchase polyester white materials, which is very convenient for management, procurement and warehousing, and saves internal consumption.

[0039] 2.6 When the front-end premixing and the rear-end mixing head output are produced separately in different places, the transition is carried out through the transfer transition device. The front-end premixing can be set at the chemical material supplier, and the transfer transition device can be allocated to the centralized feeding method of multiple sandwich panel manufacturers, which greatly reduces the equipment investment of sandwich panels.

[0040] (III) Furthermore, the transfer device is a storage tank, and the premixed white material metering pump transports the premixed white material in the storage tank to the mixing head through the third pipeline, which can meet the online production needs of PIR polyurethane. The transfer device includes a movable container, a conveying device and a storage tank. The discharge end of the dynamic mixer is loaded into the movable container. The conveying device transfers the movable container to a sandwich panel production line in a different location and loads the material into the storage tank. The storage tank is connected to the third pipeline. The premixed white material metering pump continuously transports the premixed white material in the storage tank to the mixing head through the third pipeline, which can meet the off-site production needs of PIR polyurethane. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of a manufacturer's sandwich wall panel collapsing rapidly after a fire.

[0042] Figure 2 This is a schematic diagram of a manufacturer's sandwich panel wall being ignited by sparks from electric welding during construction.

[0043] Figure 3 It is a structural schematic diagram of a mineral wool sandwich panel PIR edge banding production system according to a first embodiment of the present invention.

[0044] Figure 4 It is a structural schematic diagram of a mineral wool sandwich panel PIR edge banding production system according to a third embodiment of the present invention.

[0045] Figure 5 This is a cross-sectional view of a 50mm thick sandwich panel.

[0046] Figure 6 This is the cross-section of a 200mm thick sandwich panel.

[0047] Figure 7 This is a test diagram of the fire resistance performance of the PIR edge banding of the mineral wool sandwich panel of the present invention. Figure 7(a) is a schematic diagram of the combustion test of commercially available PUR polyurethane edge sealing and the PIR polyurethane edge sealing prepared according to the fourth embodiment of the present invention. Figure 7 (b) is a schematic diagram of the cessation of combustion of commercially available PUR polyurethane edge sealing and the PIR polyurethane edge sealing prepared in the fourth embodiment of the present invention. Figure 7 (c) On the left is a schematic diagram of the internal structure of commercially available PUR polyurethane edge sealing after combustion. Figure 7 (c) The right side is a schematic diagram of the internal structure of the PIR polyurethane edge seal after combustion, obtained in accordance with the fourth embodiment of the present invention.

[0048] In the figure:

[0049] 1. White material storage tank; 11. First pipeline; 12. White material metering pump; 2. Pentane storage tank; 21. Second pipeline; 22. Pentane metering pump; 3. Online cutting precision mixer; 4. Transfer transition device; 41. Third pipeline; 42. Premixed white material metering pump; 43. Liquid level sensor; 5. Black material storage tank; 51. Fourth pipeline; 52. Black material metering pump; 6. Mixing head; 61. Mixing tube; 62. White material chamber; 63. Black material chamber; 7. Filter; 8. Heat exchanger. DETAILED DESCRIPTION

[0050] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0051] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0052] First embodiment:

[0053] This embodiment discloses a mineral wool sandwich panel PIR edge banding production system.

[0054] like Figure 3 As shown, the mineral wool sandwich panel PIR edge banding production system includes a white material storage tank 1, a pentane storage tank 2, an online cutting precision mixer 3, a transfer transition device 4, a black material storage tank 5 and a mixing head 6.

[0055] The white material storage tank 1 is connected to a first feed end of the in-line cutting precision mixer 3 via a first pipeline 11 . A white material metering pump 12 is arranged on the first pipeline 11 . The white material metering pump 12 intermittently supplies white material to the in-line cutting precision mixer 3 .

[0056] The pentane storage tank 2 is connected to the second feed end of the in-line cutting precision mixer 3 through a second pipeline 21 . A pentane metering pump 22 is arranged on the second pipeline 21 . The pentane metering pump 22 intermittently supplies pentane to the in-line cutting precision mixer 3 .

[0057] The online cutting precision mixer 3 cuts and mixes the white material and pentane to obtain a premixed white material, and the discharge end of the online cutting precision mixer 3 is connected to the transfer transition device 4. Exemplarily, the ratio of the white material and pentane input into the online cutting precision mixer 3 is 100:6-12, and the pentane is normal pentane or cyclopentane or cycloisopentane or normal isopentane. The online cutting precision mixer 3 is a dynamic mixer, such as an emulsification pump. The dynamic mixer includes a motor, a shell, a fixed blade arranged in the shell, a rotating blade matched with the fixed blade, a shaft connecting the rotating blade and the output end of the motor, and a mechanical seal sleeved on the outside of the shaft. The mechanical seal is sealed and connected to the end face of the shell. When the white material and pentane flow into the flow channel between the fixed blade and the rotating blade through the pressure of the metering pump, the output of the motor causes the rotating blade to rotate at a high speed of 3 to 20 m / s. The gap of 0.1 to 0.5 mm between the rotating blade and the fixed blade shears each other. The two different phase liquids of white material and pentane that repel each other are instantly exploded, cut, dispersed, and collided to reach nano-level fine particles and then recombine to form a stable continuous phase liquid.

[0058] The online cutting precision mixer 3 outputs the premixed white material to the transfer transition device 4. The transfer transition device 4 is connected to the mixing head 6 through the third pipeline 41, and a premixed white material metering pump 42 is arranged on the third pipeline 41. The premixed white material metering pump 42 continuously delivers the premixed white material to the mixing head 6, and the feeding speed of the transfer transition device 4 is greater than the discharge speed of the premixed white material metering pump 42. Exemplarily, the transfer transition device 4 is a storage tank, and the volume of the storage tank is 5L to 20L. When transporting in a different place, the storage tank will increase to 200kg to 1t. The feed end of the storage tank is connected to the online cutting precision mixer 3 through a pipeline, and the discharge end of the storage tank is connected to the premixed white material metering pump 42 through the third pipeline 41. A liquid level sensor 43 is arranged in the storage tank, and the liquid level upper limit and liquid level lower limit in the storage tank are detected by the liquid level sensor 43, and the feeding stop and feeding start of the white material metering pump 12, the pentane metering pump 22 and the online cutting precision mixer 3 are controlled respectively. Of course, in other embodiments of the present invention, the opening time and closing time may be set to meet the balance of feeding and discharging of the premixed white material, and the present invention does not impose any further limitation on this.

[0059] The black material storage tank 5 is connected to the mixing head 6 through the fourth pipeline 51. The fourth pipeline 51 is provided with a black material metering pump 52. The black material metering pump 52 continuously supplies black material to the mixing head 6. The premixed white material and the black material collide and mix in the mixing head 6. Exemplarily, the black material metering pump 52 continuously pumps the black material, and the feeding speed of the black material metering pump 52 is. The mixing head 6 is a low-pressure spiral cutting blade mixing tube 61, and the pressure in the mixing tube 61 is 0.5Bar~7Bar. The black material and the premixed white material in the mixing tube 61 rely on gas flow to increase the impact force of the two materials and the spiral cutting blades in the mixing tube 61 to achieve cutting and mixing. In other embodiments of the present invention, the mixing head 6 can also adopt high-pressure mixing. After the black material and the premixed white material are pressured by their respective high-pressure metering pumps, they are input into the mixing chamber of the mixing head 6 to collide with each other at high pressure to achieve high-pressure mixing. The high-pressure collision pressure in the mixing tube 61 is 100~150Bar, and high-pressure mixing can fully achieve sufficient mixing and emulsification.

[0060] In this embodiment, there are four groups of mixing heads 6, namely, a male edge mixing head 6, a female edge mixing head 6 and two corrugated peak mixing heads 6. The number of mixing heads 6 can be adjusted according to actual production needs.

[0061] Furthermore, a filter 7 and a heat exchanger 8 are respectively provided on the first pipeline 11, the second pipeline 21 and the fourth pipeline 51. The filter 7 filters impurities in the white material, pentane and black material, and the heat exchanger 8 controls the feed temperature of the white material, pentane and black material.

[0062] In this embodiment, since the amount of edge-sealing material used is very small, the mixing effect of polyester and pentane is affected, and a highly fire-resistant edge-sealing sandwich panel cannot be made. This system fully squeezes and impacts the white material and pentane through large-flow feeding to achieve the mixing process of PIR foaming. Since the amount of premixed white material used by the mixing head 6 is relatively small, and the discharging of the mixing head 6 cannot be interrupted during continuous foaming production, the output of the premixed white material in the front stage is different from the amount of premixed white material consumed by the final mixing head 6 in the rear stage. In order to achieve a balance between the two, the premixed white material in the front stage is fed with large flow + intermittent feeding, and the small flow continuous discharging in the rear stage is achieved to achieve a balance between the two. The intermediate transfer transition device 4 plays a connecting role.

[0063] Second embodiment:

[0064] Based on the first embodiment, the second embodiment further optimizes and refines the in-line cutting precision mixer 3 of the first embodiment.

[0065] The online cutting precision mixer 3 is a static mixing tube. The static mixer is tubular. A cutting blade with a spiral at a certain angle is fixed in the tube. When the liquid flows, it is gradually cut and mixed by the cutting blade. The cutting blade is in a fluid spiral shape to reduce the resistance when the liquid passes through and make the liquid rotate during the movement along the length of the tube body to improve the mixing effect. The cutting blade is arranged from small to large in number from the inlet to the outlet, and the pores are from large to small, and from thick to thin. The cutting blade cuts the white material and pentane into 2 and 4 strands from the initial feed to the mixed liquid cut into thousands of strands at the later discharge to meet the pre-mixing process requirements of PIR foam.

[0066] Third embodiment:

[0067] Based on the first embodiment, the third embodiment further optimizes and refines the transfer device of the first embodiment.

[0068] like Figure 4 As shown, the transfer transition device 4 includes a movable container, a conveying device and a storage tank. The dynamic mixer outputs the premixed white material and inputs it into the movable container. The conveying device transports the movable container to a sandwich panel production line at a different location and loads the material into the storage tank. The storage tank is connected to the third pipeline 41. The premixed white material metering pump 42 continuously transports the premixed white material in the storage tank to the mixing head 6 through the third pipeline 41.

[0069] Exemplarily, in this embodiment, a dynamic mixer is used to prepare the premixed white material. The conveying device can be a conveyor belt, an AGV trolley, a truck or a tanker, etc. The movable container is charged through the flexible joint at the discharge end of the online cutting precision mixer 3, and the material is transported through the flexible joint at the end of the third pipeline 41.

[0070] Fourth embodiment:

[0071] This embodiment also discloses a production process of a rock wool and glass wool sandwich panel with highly flame retardant PIR polyurethane edge sealing, comprising the following steps:

[0072] Step S1 , feeding: the white material metering pump 12 intermittently transports the white material in the white material storage tank 1 to the online cutting precision mixer 3 , and at the same time, the pentane metering pump 22 intermittently transports the pentane in the pentane storage tank 2 to the online cutting precision mixer 3 .

[0073] Step S2, large flow premixing: the online cutting precision mixer 3 cuts the mixed white material and pentane to obtain a premixed white material.

[0074] Step S3, premixed white material buffer: the transfer transition device 4 receives the premixed white material intermittently input from the online cutting precision mixer 3 .

[0075] Specifically, the steps of the transfer transition device 4 receiving the premixed white material intermittently input by the online cutting precision mixer 3 include:

[0076] Step S31, simultaneously start the white material metering pump 12, the pentane metering pump 22 and the online cutting precision mixer 3 to replenish the storage tank, until the liquid level sensor 43 detects that the liquid level of the premixed white material in the storage tank rises to the upper limit position and then closes, so as to keep the supplied material ratio completely consistent.

[0077] In step S32, the mixing head 6 works non-stop. With continuous material supply, the material in the storage tank is gradually consumed. After the liquid level sensor 43 detects that the liquid level of the premixed white material in the storage tank has dropped to the lower limit position, the white material metering pump 12, the pentane metering pump 22 and the online cutting precision mixer 3 are started again at the same time to replenish the storage tank, completing a cycle.

[0078] Step S4, the mixing head 6 continuously mixes at a small flow rate: the premixed white material metering pump 42 continuously transports the premixed white material in the transfer transition device 4 to the white material chamber 62 of the mixing head 6, the feeding speed of the transfer transition device 4 is greater than the discharging speed of the premixed white material metering pump 42, the black material metering pump 52 continuously transports the black material in the black material storage tank 5 to the black material chamber 63 of the mixing head 6, the premixed white material and the black material pass through their respective feeding chambers and then flow into the mixing chamber to collide with each other and then enter the mixing tube 61 for mixing to obtain PIR polyurethane edge sealing foam.

[0079] Specifically, the step of the premixed white material metering pump 42 conveying the premixed white material in the transfer transition device 4 to the white material chamber 62 of the mixing head 6 includes:

[0080] The premixed white material metering pump 42 transports the premixed white material in the storage tank to the white material chamber 62 of the mixing head 6 through the third pipeline 41 .

[0081] In this embodiment, in order to obtain an emulsified mixed liquid, a process of increasing the premixed white material + intermittent feeding = small flow of the mixing head 6 + continuous discharge is adopted to achieve flow balance. The intermediate transfer transition device 4 buffers the premixed white material to solve the uninterrupted discharge of the mixing head to achieve continuous production, successfully overcoming the major problem of inability to mix and foam online due to the small flow of polyester and pentane.

[0082] Fifth embodiment:

[0083] Based on the fourth embodiment, the fifth embodiment further optimizes and refines the transfer step of the third embodiment.

[0084] The steps of the premixed white material metering pump 42 conveying the premixed white material in the transfer transition device 4 to the white material chamber 62 of the mixing head 6 include:

[0085] Step S41, the dynamic mixer outputs the premixed white material and loads it into a movable container.

[0086] In step S42, the conveying device transfers the movable container to a sandwich panel production line at a different location and loads the material into a storage tank. The storage tank is connected to the third pipeline 41, and the premixed white material metering pump 42 continuously conveys the premixed white material in the storage tank to the mixing head 6 through the third pipeline 41.

[0087] Sixth embodiment

[0088] like Figure 5 As shown, take the production of 50mm thick sandwich panels as an example.

[0089] The sandwich panel has male and female edges of the same size on both sides. The female edge sealing section is 0.0014㎡, the production line speed is 8m / min, the material conveying speed is 0.0014㎡*8m / min=0.0112m3 / min, and the total feed rate is 0.0112m3 / min×core material density 50kg / m3=0.56kg / min=560g / min.

[0090] The ratio of black material to premixed white material is 165:110. Black material feeding speed = 560g / min*165÷(165+110) = 336g / min = 5.6g / s; premixed white material feeding speed = 560g / min*110÷(165+110) = 224g / min = 3.7g / s;

[0091] Since the amount of the male and female sides of the sandwich panel is the same, the total feeding speed of the premixed white material for the male and female sealing edges = 3.7g / s*2 = 7.4g / s.

[0092] A 20L storage tank was used, and the feeding was started when the low liquid level was 3L, and the feeding was stopped when the high liquid level was 15L. The feeding amount each time was 12L×1.1g / cm3=13200g.

[0093] 13200g÷448g / min=29.5min, i.e., refilling starts after 29.5min. The mixing head 6 consumes 7.4g / s*45.5s=340g per second, and the refilling amount each time is 13200g+340g=13540g. The actual refilling speed is 298g / s, and the refilling time each time is 13540g÷298g / s=45.5s, i.e., the refilling time each time is 45.5s.

[0094] Calculate the cutting speed of the premixed white material and the static mixer cutting blade:

[0095] If the mixing process with the same premixing flow rate at the front end and the same consumption at the back end is adopted, the discharge speed of the premixed white material is 7.4g / s, which is converted into a volume of 7.4g / s÷1.1g / cm3=6.73cm3 / s=6730mm3 / s. The diameter of the static mixing tube is 10mm, and the cutting speed is 6730mm3 / s÷(5mm2*3.14)=85.7mm / s. When pentane and polyester move at a speed of 85.7mm / s and are cut by the blade in the static mixing tube, there is almost no impact force, and the mixed and emulsified premixed polyester white material cannot be obtained, which cannot lay the foundation for the later production of PIR foam.

[0096] If the mixing process of the present invention is used to increase the flow rate, the discharge speed of the premixed white material is 298g / s, which is converted into volume as 298g / s÷1.1g / cm3=270cm3 / s=270909mm3 / s. The diameter of the static mixing tube is 10mm, and the cutting speed = 6730mm3 / s÷(5mm2*3.14)=3.45m / s.

[0097] Summary: Through large flow mixing, the discharge speed of premixed white material is 298g / s, and the cutting speed of premixed white material and static mixer cutting blade is 3.45m / s. If the mixing process of increasing flow is not adopted, the cutting speed of premixed white material and static mixer cutting blade is 85.7mm / s.

[0098] Seventh embodiment

[0099] like Figure 6 As shown, take the production of 200mm thick sandwich panels as an example.

[0100] The sandwich panel has male and female edges of the same size on both sides. The female edge sealing section is 0.00645㎡, the production line speed is 4m / min, the material conveying speed is 0.00645㎡*4m / min=0.0258m3 / min, and the total feed rate is 0.0258m3 / min×core material density 50kg / m3=1.29kg / min=1290g / min.

[0101] The ratio of black material to premixed white material is 165:110. Black material feeding speed = 1290g / min*165÷(165+110) = 774g / min = 12.9g / s; premixed white material feeding speed = 1290g / min*110÷(165+110) = 516g / min = 8.6g / s;

[0102] Since the amount of the male and female sides of the sandwich panel is the same, the total feeding speed of the premixed white material for the male and female sealing edges = 8.6g / s*2 = 17.2g / s = 1032g / min.

[0103] A 20L storage tank was used, and the feeding was started when the low liquid level was 3L, and the feeding was stopped when the high liquid level was 15L. The feeding amount each time was 12L×1.1g / cm3=13200g.

[0104] 13200g÷1032g / min=12.8min, i.e., refilling starts after 12.8min. The mixing head 6 consumes 17.2g / s*45.5s=783g per second, and the refilling amount each time is 13200g+783g=13983g, the actual refilling speed is 307g / s, and the refilling time each time is 13983g÷307g / s=45.5s, i.e., the refilling time each time is 45.5s.

[0105] Calculate the cutting speed of the premixed white material and the static mixer cutting blade:

[0106] If the mixing process is adopted with the same front-end premixing flow and back-end consumption, the premixed white material discharge speed is 17.2g / s, which is converted into volume as 17.2g / s÷1.1g / cm3=15.63cm3 / s=15636mm3 / s. The diameter of the static mixing tube is 10mm, and the cutting speed = 15636mm3 / s÷(5mm2*3.14)=199mm / s.

[0107] If the mixing process of the present invention is used to increase the flow rate, the discharge speed of the premixed white material is 307 g / s, which is converted into volume as 307 g / s÷1.1 g / cm3=279.09 cm3 / s=279090 mm3 / s. The diameter of the static mixing tube is 10 mm, and the cutting speed=279090 mm3 / s÷(5 mm2*3.14)=3.55 m / s.

[0108] Summary: Through large-flow mixing, the discharge speed of the premixed white material is 307g / s, and the cutting speed of the premixed white material and the static mixer cutting blade is 3.55m / s.

[0109] If the mixing process to increase the flow rate is not used, the cutting speed of the premixed white material and the static mixer cutting blade is 199 mm / s.

[0110] Test example:

[0111] The premixed white material and black isocyanate prepared in the fourth embodiment are mixed and injected into the side cavity of the sandwich panel for curing to form a PIR rigid foam edge. Commercially available PUR foam is purchased and injected into the side cavity of the sandwich panel for curing to form a PUR rigid foam edge. A fire resistance test is conducted by using the same 1200°C flame equidistantly perpendicular to the board surface to burn the sandwich panel PUR rigid foam edge and the sandwich panel PIR rigid foam edge for 2 minutes. The test results are as follows: Figure 7 shown. Figure 7In (b), the burning of the PUR polyurethane edge band on the right side is still ongoing after the fire source is removed, while the burning of the PIR polyurethane edge band on the left side stops immediately after the fire source is removed. Figure 7 In (c), the inside of the PUR polyurethane edge banding on the left has been completely carbonized and has lost its supporting strength. Figure 7 In (c), the PIR polyurethane edge banding on the right is only slightly carbonized on the outer surface, while the interior remains intact and still has supporting strength, with better fire resistance.

[0112] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0113] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A mineral wool sandwich panel PIR edge banding production system, characterized in that: The production system comprises a white material storage tank (1), a pentane storage tank (2), an online cutting precision mixer (3), a transfer transition device (4), a black material storage tank (5) and a mixing head (6); the white material storage tank (1) is connected to a first feed end of the online cutting precision mixer (3) via a first pipeline (11), a white material metering pump (12) is arranged on the first pipeline (11), and the white material metering pump (12) conveys white material to the online cutting precision mixer (3); the pentane storage tank (2) is connected to a second feed end of the online cutting precision mixer (3) via a second pipeline (21), a pentane metering pump (22) is arranged on the second pipeline (21), and the pentane metering pump (22) conveys pentane to the online cutting precision mixer (3); the online cutting precision mixer (3) cuts and mixes the white material and the pentane to obtain a premixed white material, The discharge end of the inline cutting precision mixer (3) is connected to the transfer transition device (4), and the inline cutting precision mixer (3) outputs the premixed white material to the transfer transition device (4); the transfer transition device (4) is connected to the mixing head (6) via a third pipeline (41), and a premixed white material metering pump (42) is arranged on the third pipeline (41), and the premixed white material metering pump (42) continuously delivers the premixed white material to the mixing head (6), and the feeding speed of the transfer transition device (4) is greater than the discharge speed of the premixed white material metering pump (42); the black material storage tank (5) is connected to the mixing head (6) via a fourth pipeline (51), and a black material metering pump (52) is arranged on the fourth pipeline (51), and the black material metering pump (52) continuously delivers the black material to the mixing head (6), and the premixed white material and the black material collide and mix in the mixing head (6).

2. The mineral wool sandwich panel PIR edge banding production system according to claim 1, characterized in that: The online cutting precision mixer (3) is a dynamic mixer, which performs dynamic high-shear mixing and emulsification. The dynamic mixer comprises a motor, a housing, a fixed blade arranged in the housing, a rotating blade matched with the fixed blade, a shaft connecting the rotating blade and the output end of the motor, and a mechanical seal sleeved on the outer side of the shaft. The mechanical seal is sealed and connected to the end face of the housing. When the white material and pentane flow into the flow channel between the fixed blade and the rotating blade through the pressure of the metering pump, the output of the motor causes the rotating blade to rotate at a high speed of 3 to 20 m / s. The gap of 0.1 to 0.5 mm between the rotating blade and the fixed blade shears each other. The white material and pentane, two different phase liquids that repel each other, are instantly exploded, cut, dispersed, and collided to reach nano-level fine particles and then recombined to form a stable continuous phase liquid.

3. The mineral wool sandwich panel PIR edge banding production system according to claim 1, characterized in that: The online cutting precision mixer (3) is a static mixer. The static mixer is tubular. A cutting blade with a spiral at a certain angle is fixedly arranged in the tube. When the liquid flows, it is continuously cut and mixed by the cutting blade. The cutting blade is in a fluid spiral shape to reduce the resistance of the liquid when it passes through and makes the liquid rotate during the linear movement along the length of the tube body, thereby improving the mixing effect. The cutting blades are arranged from small to large in number from the inlet to the outlet, and the pores are from large to small, and from thick to thin. The cutting blades cut the white material and pentane into 2 strands and 4 strands at the beginning of the feeding and into thousands or tens of thousands of strands of mixed liquid at the later discharge to meet the process requirements of the premixing of the PIR foam. The diameter of the mixing tube is determined according to the flow rate of the pump. The flow rate in the tube must reach more than 3 m / s. The flow rate of pentane and polyester reaches more than 3 m / s in the tube. After colliding with the blade, a relatively good mixed liquid will be obtained. This mixed liquid will not have any precipitation within 24 hours, and can fully meet the edge sealing foaming production of PIR.

4. The mineral wool sandwich panel PIR edge banding production system according to any one of claims 1 to 3, characterized in that: The transfer transition device (4) is a storage tank with a capacity of 5L to 20L. The feed end of the storage tank is connected to the online cutting precision mixer (3) through a pipeline, and the discharge end of the storage tank is connected to the premixed white material metering pump (42) through a third pipeline (41). A liquid level sensor (43) is arranged in the storage tank, and the lower limit of the liquid level sensor (43) is the start of feeding, and the upper limit of the liquid level sensor (43) is the stop of feeding.

5. The mineral wool sandwich panel PIR edge banding production system according to claim 2, characterized in that: The transfer transition device (4) includes a movable container, a conveying device and a storage tank. The dynamic mixer outputs the premixed white material and inputs it into the movable container. The conveying device transports the movable container to a sandwich panel production line at a different location and loads the material into the storage tank. The storage tank is connected to a third pipeline (41). The premixed white material metering pump (42) continuously transports the premixed white material in the storage tank to the mixing head (6) through the third pipeline (41).

6. The mineral wool sandwich panel PIR edge banding production system according to claim 1, characterized in that: The ratio of white material to pentane input into the online cutting precision mixer (3) is 100:(6-12), and the pentane is n-pentane or cyclopentane or cycloisopentane or n-isopentane; the mixing head (6) is a low-pressure spiral cutting blade mixing tube (61), and the compressed air pressure input into the mixing tube (61) is 0.5 Bar-7 Bar; the black material and the premixed white material in the mixing tube (61) are driven by the rapid flow of gas to be quickly cut by the spiral blade to meet the process mixing requirements; the mixing head (6) can also adopt high-pressure mixing, and the black material and the premixed white material are input into the mixing chamber of the mixing head (6) after the pressure is built up by their respective high-pressure metering pumps, and the two materials collide with each other at high pressure to achieve high-pressure mixing, and the high-pressure collision pressure in the mixing tube (61) is 100-150 Bar, and high-pressure mixing can fully achieve sufficient mixing and emulsification.

7. The production process of PIR edge banding of mineral wool sandwich panels is characterized by: The following steps are involved: In order to obtain an emulsified mixed liquid, a process of increasing premixed white material + intermittent feeding = small flow rate of the mixing head (6) + continuous discharge is adopted to achieve flow balance. The intermediate transfer transition device (4) caches the premixed white material to solve the problem of uninterrupted discharge of the mixing head to achieve continuous production, successfully overcoming the major problem of inability to mix and foam online due to the small flow rate of polyester and pentane; Feeding: The white material metering pump (12) intermittently transports the white material in the white material storage tank (1) to the online cutting precision mixer (3), and at the same time, the pentane metering pump (22) intermittently transports the pentane in the pentane storage tank (2) to the online cutting precision mixer (3); Large flow premixing: the online cutting precision mixer (3) cuts and mixes the white material and pentane to obtain a premixed white material; Premixed white material buffer: the transfer transition device (4) receives the premixed white material intermittently input from the online cutting precision mixer (3); The mixing head (6) performs continuous mixing at a small flow rate: the premixed white material metering pump (42) continuously transports the premixed white material in the transfer transition device (4) to the white material chamber (62) of the mixing head (6), and the feeding speed of the transfer transition device (4) is greater than the discharging speed of the premixed white material metering pump (42); the black material metering pump (52) continuously transports the black material in the black material storage tank (5) to the black material chamber (63) of the mixing head (6), and the premixed white material and the black material are collected into the mixing chamber after passing through their respective feeding chambers, collide with each other, and then enter the mixing pipe (61) for mixing, thereby obtaining PIR polyurethane edge-sealed foam.

8. The PIR edge banding production process for mineral wool sandwich panels according to claim 7, characterized in that: The step of the transfer transition device (4) receiving the premixed white material intermittently input from the online cutting precision mixer (3) comprises: At the same time, the white material metering pump (12), the pentane metering pump (22) and the in-line cutting precision mixer (3) are turned on to replenish the material storage tank until the liquid level sensor (43) detects that the liquid level of the premixed white material in the material storage tank rises to the upper limit position and then they are turned off at the same time, so that the material ratio supplied is kept completely consistent; The mixing head (61) works non-stop. With continuous material supply, the material in the storage tank is gradually consumed. After the liquid level sensor (43) detects that the liquid level of the premixed white material in the storage tank has dropped to the lower limit, it sends a refilling signal and starts the white material metering pump (12), pentane metering pump (22) and online cutting precision mixer (3) at the same time to refill the storage tank, completing a cycle.

9. The PIR edge banding production process for mineral wool sandwich panels according to claim 7, characterized in that: The step of the premixed white material metering pump (42) conveying the premixed white material in the transfer transition device (4) to the white material chamber (62) of the mixing head (6) comprises: The premixed white material metering pump (42) transports the premixed white material in the material storage tank to the white material chamber (62) of the mixing head (6) through the third pipeline (41).

10. The PIR edge banding production process for mineral wool sandwich panels according to claim 7, characterized in that: The step of the premixed white material metering pump (42) conveying the premixed white material in the transfer transition device (4) to the white material chamber (62) of the mixing head (6) comprises: The premixed white material output from the dynamic mixer is loaded into a movable container; The conveying device transfers the movable container to a sandwich panel production line at a different location and loads the material into a storage tank. The storage tank is connected to a third pipeline (41). The premixed white material metering pump (42) continuously conveys the premixed white material in the storage tank to the mixing head (6) through the third pipeline (41).

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