Production method and block structure of rock wool sandwich aerated concrete block without cold bridge

Abstract

The present invention relates to a method for producing a cold bridge-free rock wool sandwich aerated concrete block and a block structure, belonging to the technical field of building components. The production method is to arrange cutting steel wires on four cutting surfaces of a rock wool board before inserting the rock wool board into an aerated concrete slurry mold barrel, insert the rock wool board with the cutting steel wires into the aerated concrete slurry by using a steel chisel, and after the aerated concrete slurry reaches the initial setting state, cut along the cutting surface of the rock wool board with the cutting steel wire, retain the aerated concrete layer at the bonding surface of the rock wool board, expose the surrounding of the rock wool board to the outside, and finally autoclave curing it; when the block is used, the rock wool boards of adjacent blocks contact each other, and no cold bridge is generated, so that the thermal insulation performance of the building is better, and the cutting position is accurate and dust is not generated by cutting with the cutting steel wire in the initial setting stage instead of cutting with a cutting machine after the final setting. In the formed block structure, the bonding strength between the layers of materials is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of building components, and in particular relates to a production method of a cold bridge-free rock wool sandwich aerated concrete building block and a building block structure. Background Art

[0002] With the rise of prefabricated buildings and the policy promotion of green buildings, there are more and more factories and houses using autoclaved aerated concrete (AAC) wall materials. However, with the improvement of living standards, people's requirements for building performance are gradually improving, and the demand for thermal insulation performance of walls is also higher. In order to improve the thermal insulation of walls, some building materials factories have improved autoclaved aerated concrete materials. Rock wool sandwich concrete material is an improved autoclaved aerated concrete material with better thermal insulation.

[0003] The earliest rock wool sandwich autoclaved aerated concrete material, such as a fly ash concrete composite block disclosed in the Chinese patent publication number CN1215781A, is composed of a lightweight hollow block and a thermal insulation core material in the cavity thereof, wherein the lightweight hollow block is a fly ash concrete block; wherein the thermal insulation core material is polyphenyl foam, phenolic foam, urea foam, glass wool, rock wool, perlite or vermiculite. The fly ash concrete composite block is wrapped around the thermal insulation core material with a fly ash concrete layer. After the blocks are built into a wall, the concrete layers of adjacent blocks contact each other, and the contacting concrete layers form a cold bridge, which seriously affects the thermal insulation performance of the wall.

[0004] In view of the above problems, improvements have been made to rock wool sandwich autoclaved aerated concrete blocks / boards. For example, the invention patent application with application publication number CN114523732A discloses an autoclaved aerated concrete fiber sandwich panel, which includes: at least one layer of reinforcing fiber material layer and at least two layers of autoclaved aerated concrete layer; two sides of the sandwich panel are two autoclaved aerated concrete layers; the reinforcing fiber material layer and the autoclaved aerated concrete layer are arranged in sequence, and each autoclaved aerated concrete layer is directly in contact with and bonded to the adjacent reinforcing fiber material layer. After the autoclaved aerated concrete composite wall panel is spliced, the fiber material layers of the adjacent wall panels are in contact with each other, so there will be no cold bridge, and the thermal insulation effect is better.

[0005] During the production process of the above-mentioned fiber-sandwich autoclaved aerated concrete blocks / boards without cold bridges, the autoclaved aerated concrete layer and the fiber material layer are produced separately. After production, the autoclaved aerated concrete layer is bonded to both sides of the fiber material layer with an adhesive. This bonding method results in low bonding strength between the fiber material layer and the autoclaved aerated concrete layer. Under harsh conditions or after long-term use, the fiber material layer and the autoclaved aerated concrete layer will fall off.

[0006] Another processing method is to insert the fiber material layer into the autoclaved aerated concrete slurry. After the autoclaved aerated concrete is cured and formed, a cutting tool is used to cut off the protective layer around the fiber material layer. This forming process has the following defects: 1. After the fiber material layer is inserted into the concrete slurry, the buoyancy of the concrete slurry causes the fiber material layer to float. After the concrete slurry is finally set, the position of the fiber material layer can only be roughly known. When the protective layer is cut by a cutting machine, the fiber material layer is sometimes cut, and sometimes the fiber material layer cannot be completely exposed, resulting in a high scrap rate of the fiber sandwich autoclaved aerated concrete block / board, affecting the final thermal insulation effect; 2. A large amount of dust is generated during the cutting process, affecting the production environment and the health of the cutting personnel. Summary of the invention

[0007] The present invention provides a method for producing a cold bridge-free rock wool sandwich aerated concrete block and a block structure, so as to solve the problems of low bonding strength and easy falling off of each layer of materials when a rock wool board and an aerated concrete layer are connected by bonding, and solve the problems of inability to accurately control the cutting position, high scrap rate of fiber sandwich autoclaved aerated concrete blocks / boards, poor working environment, etc. when a rock wool board and an aerated concrete layer are integrated into one molding method.

[0008] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0009] The present invention relates to a method for producing a cold bridge-free rock wool sandwich aerated concrete building block, which comprises the following steps:

[0010] S1. Take a rectangular parallelepiped rock wool board, the two opposite faces with the largest area of ​​the rock wool board are bonding faces, and the other four faces are cutting faces. Drill holes in the rock wool board to form a number of through holes connecting the two bonding faces, set guide rods between adjacent cutting faces, and set cutting wires between the guide rods on both sides of the same cutting face;

[0011] S2. Use a steel chisel to insert the rock wool board into the mold barrel containing the aerated concrete slurry, and the six surfaces of the rock wool board are not in contact with the inner wall of the mold barrel, so that after the aerated concrete slurry is initially set, an aerated concrete layer is formed on the periphery of the rock wool board, and the aerated concrete slurry penetrates into the through holes to form aerated concrete ribs;

[0012] S3. Use a steel chisel to remove the aerated concrete block, dig out the aerated concrete layer at the cutting wire to expose the cutting wire, pull the cutting wire to move it along the guide rod, cut off the aerated concrete layer at the cutting surface of the rock wool board, and only retain the aerated concrete layer at the bonding surface. The cutting surfaces of the retained aerated concrete layer are flush with the corresponding cutting surfaces of the rock wool board, and the aerated concrete ribs connect the aerated concrete layers at the bonding surfaces on both sides of the rock wool board;

[0013] S4. Transport the rock wool board and the retained aerated concrete layer to the autoclave for autoclave curing.

[0014] Preferably, in step S1, a steel bar connector is further provided in each through hole, and both ends of the steel bar connector protrude from the bonding surfaces on both sides of the rock wool board, and after step S3, both ends of the steel bar connector extend into the retained aerated concrete layer. The steel bar connector improves the connection strength of the aerated concrete rib to the aerated concrete layers on both sides.

[0015] Preferably, the steel bar connector includes straight bars and U-shaped tie bars arranged at both ends of the straight bars. A nut is provided in the middle of the U-shaped tie bars, and a thread head is provided at both ends of the straight bars. The U-shaped tie bars are fixed to the ends of the straight bars through the cooperation of the thread head and the nut, and the two ends of the U-shaped tie bars are inserted into the rock wool board.

[0016] Preferably, the length of the cutting wire provided in step 1 is greater than the length of the cutting surface on which it is located.

[0017] Preferably, the ends of the cutting wire provided in step 1 are provided with a gripping portion.

[0018] Preferably, in step 2, the rock wool board is installed on the steel chisel through a clamping piece, and the clamping piece includes an upper splint, a plastic tube and a lower splint; the plastic tube passes through the rock wool board, and the position of the plastic tube is staggered with the position of the through hole, and an elastic chuck is provided at the top of the plastic tube; the upper splint and the lower splint are respectively arranged on two opposite cutting surfaces of the rock wool board, and a circular hole matching the elastic chuck is provided at the center of the upper splint, and the upper splint is connected to the upper end of the plastic tube through a spring chuck passing through the circular hole; a rectangular hole is provided at the center of the lower splint, and an elliptical plug is provided at the bottom end of the steel chisel, and the long diameter of the elliptical plug is larger than the short side of the rectangular hole and smaller than the long side of the mounting hole, and the steel chisel passes through the plastic tube so that the elliptical plug passes through the rectangular hole of the lower splint, and the steel chisel is rotated 90 degrees and then locked. After the steel chisel locks the lower splint, a protective box is set on the elliptical plug.

[0019] Preferably, the upper and lower splints are both U-shaped plates, and the distance between the side plates of the upper and lower splints is equal to the distance between the two bonding surfaces of the rock wool board; the upper and lower splints are made of hard and easily fusible plastic, which is melted by heat during the autoclave curing process in step S4.

[0020] Preferably, in step S2, multiple rock wool boards are placed in a mold barrel containing aerated concrete slurry using multiple steel chisels, and the multiple rock wool boards are arranged at intervals along a straight line; in step S3, after taking out the aerated concrete block using the steel chisel, the aerated concrete block is first cut in layers to form multiple aerated concrete block sub-units, and then the aerated concrete layer at the cut surface of the rock wool board in the corresponding aerated concrete block sub-unit is cut with a cutting wire. In this way, the production efficiency of the rock wool sandwich aerated concrete block can be improved.

[0021] The present invention also relates to a cold-bridge-free rock wool sandwich aerated concrete block structure formed by the above-mentioned cold-bridge-free rock wool sandwich aerated concrete block production method, which includes a rock wool board and two aerated concrete layers; the two opposite surfaces of the rock wool board with the largest areas are bonding surfaces, and the remaining four surfaces are cutting surfaces, and the two aerated concrete layers are closely attached to the two bonding surfaces of the rock wool board; the four surfaces of the aerated concrete layer that are perpendicular to the bonding surfaces of the rock wool board are respectively flush with the cutting surfaces corresponding to the rock wool board; the rock wool board is provided with a number of through holes connecting the two bonding surfaces, and the through holes are provided with aerated concrete ribs integrally formed with the aerated concrete layer.

[0022] Preferably, a steel bar connector is provided inside the aerated concrete rib, and both ends of the steel bar connector extend into two aerated concrete layers respectively; the steel bar connector includes straight bars and U-shaped tie bars arranged at both ends of the straight bars, a nut is provided in the middle of the U-shaped tie bars, and a thread head is provided at both ends of the straight bars, and the U-shaped tie bars are fixed to the ends of the straight bars through the cooperation of the thread head and the nut, and the two ends of the U-shaped tie bars are inserted into the rock wool board.

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] 1. The present invention relates to a method for producing a cold bridge-free rock wool sandwich aerated concrete block. Before the rock wool board is inserted into the aerated concrete slurry mold barrel, cutting wires are arranged on the four cutting surfaces of the rock wool board, and the rock wool board installed with the cutting wires is inserted into the aerated concrete slurry by using a steel chisel. After the aerated concrete slurry reaches the initial setting state, the cutting wire is used to cut along the cutting surface of the rock wool board, and only the aerated concrete layer at the bonding surface of the rock wool board is retained, so that the surrounding of the rock wool board is exposed to the outside, and finally it is subjected to autoclave curing. When the block is used, the rock wool boards of adjacent blocks are in contact with each other, and no cold bridge is generated. The cutting by the cutting wire in the initial setting stage replaces the cutting by the cutting machine after the final setting, and the cutting position is accurate and no dust is generated.

[0025] 2. The rock wool board used in the method for producing cold bridge-free rock wool sandwich aerated concrete blocks according to the present invention is provided with a through hole, and a steel bar connector is also provided in the through hole. After the through hole is inserted into the aerated concrete slurry, the aerated concrete flows into the through hole. When the aerated concrete slurry hardens, aerated concrete ribs are formed at the through hole. The aerated concrete ribs tie the aerated concrete layers on both sides of the rock wool board together, so that the bonding strength between the layers of materials is guaranteed, and there will be no separation problem between the layers of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the rock wool board preparation process;

[0027] Figure 2It is a schematic diagram of the structure after the steel bar connectors and clamps are installed on the rock wool board;

[0028] Figure 3 is the front view of the clamp;

[0029] Figure 4 This is the front view of the steel drill;

[0030] Figure 5 It is a schematic diagram of the steel bar connection of the semi-finished (omitted) rock wool sandwich aerated concrete block of initial setting;

[0031] Figure 6 It is a schematic diagram of the structure of the final rock wool sandwich aerated concrete block;

[0032] Figure 7 It is the main view of the final rock wool sandwich aerated concrete block.

[0033] Illustration: 1- rock wool board, 11- bonding surface, 12- cutting surface, 13- through hole, 14- guide rod, 15- cutting wire, 2- steel chisel, 21- elliptical plug, 22-, 3- aerated concrete layer, 4- aerated concrete rib, 5- steel bar connector, 51- straight bar, 52- U-shaped tie bar, 6- clamping piece, 61- upper splint, 62- plastic pipe, 63- lower splint, 64- elastic chuck. DETAILED DESCRIPTION

[0034] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0035] The present invention relates to a method for producing a cold bridge-free rock wool sandwich aerated concrete building block, which comprises the following steps:

[0036] S1. Take a rectangular parallelepiped rock wool board 1, the two opposite faces with the largest area of ​​the rock wool board 1 are bonding faces 11, and the other four faces are cutting faces 12. Drill holes in the rock wool board 1 to form a number of through holes 13 connecting the two bonding faces. Set guide rods 14 between adjacent cutting faces 12. The guide rods 14 can be bonded to the rock wool board 1 with adhesive tape. Cutting wires 15 are set between the guide rods on both sides of the same cutting face. The two ends of the cutting wires 15 are temporarily wound around the guide rods 14 to form a Figure 1 In the structure shown in FIG. 1 , the length of the cutting wire 15 is greater than the length of the cutting surface on which it is located, and the ends of the cutting wire 15 are provided with a gripping portion; a steel bar connector 5 is provided in each through hole 13, and both ends of the steel bar connector 5 protrude from the bonding surfaces on both sides of the rock wool board 1. The specific structure of the steel bar connector 5 is as follows Figure 2As shown, it includes a straight reinforcement 51 and U-shaped reinforcement bars 52 arranged at both ends of the straight reinforcement 51. A nut is provided in the middle of the U-shaped reinforcement bar 52, and a thread head is provided at both ends of the straight reinforcement 51. The U-shaped reinforcement bar 52 is fixed to the end of the straight reinforcement 51 through the cooperation of the thread head and the nut. In this way, the distance between the U-shaped reinforcement bars 52 at both ends can be adjusted. Finally, the two heads of the U-shaped reinforcement bar 52 need to be inserted into the rock wool board 1.

[0037] S2. Use a steel drill 2 to insert the rock wool board 1 into a mold barrel containing aerated concrete slurry. The rock wool board 1 is installed on the steel drill 2 through a clamp 6. The structure of the clamp 6 is as follows: Figure 3 As shown, it includes an upper clamping plate 61, a plastic tube 62 and a lower clamping plate 63. The plastic tube 62 passes through the rock wool board 1, and the position of the plastic tube 62 is staggered with the position of the through hole 13. The top of the plastic tube 62 is provided with an elastic clamping head 64, and the center of the lower clamping plate 63 is provided with a rectangular hole; the specific connection method of the steel drill 2 and the rock wool board 1 is as follows Figures 2 to 4 As shown, the upper clamping plate 61 and the lower clamping plate 62 are respectively arranged on two opposite cutting surfaces of the rock wool board 1, and the upper clamping plate 61 and the lower clamping plate 62 are both U-shaped plates. The distance between the side plates of the upper clamping plate 61 and the lower clamping plate 62 is equal to the distance between the two bonding surfaces of the rock wool board 1. The upper clamping plate 61 and the lower clamping plate 62 are made of hard and easily fusible plastic. The center of the upper clamping plate 61 is provided with a circular hole that matches the elastic clamp. The upper clamping plate 61 is connected to the upper end of the plastic pipe through the spring clamp 64 that passes through the circular hole; the steel drill 2 The bottom end is provided with an elliptical plug 21, the long diameter of which is larger than the short side of the rectangular hole and smaller than the long side of the mounting hole. The steel drill 2 penetrates the plastic tube 62 so that the elliptical plug 21 passes through the rectangular hole of the lower clamping plate 63. After the steel drill 2 is rotated 90 degrees, the long diameter of the elliptical plug 21 is parallel to the short side of the rectangular hole, thereby locking the lower clamping plate 63. After the steel drill 2 locks the lower clamping plate, a protective box 22 is set at the elliptical plug 21 to prevent the steel cable 2 from being pulled out after the aerated concrete slurry solidifies. After the rock wool board 1 is inserted into the mold barrel, the six surfaces of the rock wool board 1 do not contact the inner wall of the mold barrel, thereby forming an aerated concrete layer 3 on the periphery of the rock wool board 1 after the aerated concrete slurry is initially solidified, and the aerated concrete slurry penetrates into the through hole to form an aerated concrete rib 4.

[0038] S3. Use the steel drill 2 to take out the initially set aerated concrete block, rotate the steel drill 2 90 degrees again, so that the long diameter of the elliptical plug 21 is parallel to the long side of the rectangular hole, and pull out the steel drill 2. At this time, the protective box 22 remains in the initially set aerated concrete layer (the aerated concrete layer with the protective box 22 remaining needs to be removed later), dig out the aerated concrete layer 3 at the cutting wire 15, expose the cutting wire 15, pull the cutting wire 15 to move it along the guide rod 14, cut off the aerated concrete layer at the cutting surface 12 of the rock wool board 1, and only retain the aerated concrete layer at the bonding surface 11. The cutting surfaces of the retained aerated concrete layer are flush with the corresponding cutting surfaces of the rock wool board 1, and the aerated concrete ribs 4 are connected to the aerated concrete layer 3 at the bonding surfaces on both sides of the rock wool board 1. Figure 6 and Figure 7 Both ends of the steel connector 5 extend into the retained aerated concrete layer 3 to improve the connection strength of the aerated concrete ribs 4 to the aerated concrete layer 3 on both sides.

[0039] S4. The rock wool board 1 and the retained aerated concrete layer 3 are transported to an autoclave for autoclaving and curing. During the autoclaving and curing process, the upper clamping plate 61 and the lower clamping plate 62 are melted by heat.

[0040] According to the method for producing cold bridge-free rock wool sandwich aerated concrete blocks, after the aerated concrete slurry reaches the initial setting state, a cutting wire 15 is used to cut along the cutting surface 12 of the rock wool board 1, and only the aerated concrete layer 3 at the bonding surface 11 of the rock wool board 1 is retained, so that the surrounding areas of the rock wool board 1 are exposed to the outside, and finally the rock wool board 1 is subjected to autoclave curing. The cutting by the cutting wire in the initial setting stage replaces the cutting by the cutting machine after the final setting, so the cutting position is accurate and dust is not generated.

[0041] In order to improve production efficiency, in step S2, multiple rock wool boards 1 are placed in a mold barrel containing aerated concrete slurry using multiple steel chisels, and multiple rock wool boards 1 are arranged at intervals along a straight line; in step S3, after taking out the aerated concrete block with the steel chisel, the aerated concrete block is first cut in layers to form multiple aerated concrete block sub-units, and then the aerated concrete layer at the cut surface of the rock wool board in the corresponding aerated concrete block sub-unit is cut with a cutting wire. In this way, multiple uncured rock wool sandwich aerated concrete blocks can be formed at one time.

[0042] The cold bridge-free rock wool sandwich aerated concrete block structure produced by the above processing method is as follows Figure 6 and 7As shown, it includes a rock wool board 1 and two layers of aerated concrete layers 3; the two opposite surfaces with the largest area of ​​the rock wool board 1 are bonding surfaces 11, and the remaining four surfaces are cutting surfaces 12, and the two layers of aerated concrete layers 3 are close to the two bonding surfaces 11 of the rock wool board 1; the four surfaces of the aerated concrete layer 3 that are perpendicular to the bonding surface of the rock wool board are flush with the cutting surfaces 12 corresponding to the rock wool board 1; the rock wool board is provided with a plurality of through holes 13 connecting the two bonding surfaces, and the through holes 13 are provided with aerated concrete ribs 4 integrally formed with the aerated concrete layer 3; the aerated concrete rib 4 is provided with a steel bar connector 5 inside, and the two ends of the steel bar connector 5 extend into the two layers of aerated concrete layers 3 respectively; the steel bar connector 5 includes a straight bar 51 and a U-shaped tie bar 52 arranged at both ends of the straight bar, a nut is provided in the middle of the U-shaped tie bar 52, and a thread head is provided at both ends of the straight bar 51, and the U-shaped tie bar 52 is fixed to the end of the straight bar through the cooperation of the thread head and the nut, and the two ends of the U-shaped tie bar are inserted into the rock wool board 1. When the building block is in use, the rock wool boards 1 of adjacent building blocks are in contact with each other, and no cold bridge is generated.

[0043] The present invention is described in detail above in conjunction with the embodiments, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for producing a cold bridge-free rock wool sandwich aerated concrete block, characterized in that: It includes the following steps: S1. Take a rectangular parallelepiped rock wool board, the two opposite faces with the largest area of ​​the rock wool board are bonding faces, and the other four faces are cutting faces. Drill holes in the rock wool board to form a number of through holes connecting the two bonding faces, set guide rods between adjacent cutting faces, and set cutting wires between the guide rods on both sides of the same cutting face; S2. Use a steel chisel to insert the rock wool board into the mold barrel containing the aerated concrete slurry. Specifically, use multiple steel chisels to put multiple rock wool boards into the mold barrel containing the aerated concrete slurry. The multiple rock wool boards are arranged at intervals along a straight line. The six surfaces of the rock wool board do not contact the inner wall of the mold barrel, so that after the aerated concrete slurry is initially set, an aerated concrete layer is formed on the periphery of the rock wool board, and the aerated concrete slurry penetrates into the through holes to form aerated concrete ribs; S3. Take out the aerated concrete block with a steel chisel, first cut the aerated concrete block in layers to form multiple aerated concrete block sub-units, then dig out the aerated concrete layer at the cutting wire to expose the cutting wire, pull the cutting wire to move it along the guide rod, and use the cutting wire to cut off the aerated concrete layer at the cutting surface of the rock wool board in the corresponding aerated concrete block sub-unit, leaving only the aerated concrete layer at the bonding surface, the cutting surfaces of the retained aerated concrete layer are flush with the corresponding cutting surfaces of the rock wool board, and the aerated concrete ribs connect the aerated concrete layers at the bonding surfaces on both sides of the rock wool board; S4. Transport the rock wool board and the retained aerated concrete layer to the autoclave for autoclave curing.

2. The method for producing a cold bridge-free rock wool sandwich aerated concrete block according to claim 1, characterized in that: In the step S1, a steel bar connector is also arranged in each through hole, and both ends of the steel bar connector protrude from the bonding surfaces on both sides of the rock wool board. After step S3, both ends of the steel bar connector extend into the retained aerated concrete layer.

3. The method for producing a cold bridge-free rock wool sandwich aerated concrete block according to claim 2, characterized in that: The steel bar connector includes a straight bar and a U-shaped tie bar arranged at both ends of the straight bar. A nut is provided in the middle of the U-shaped tie bar, and a thread head is provided at both ends of the straight bar. The U-shaped tie bar is fixed to the end of the straight bar through the cooperation of the thread head and the nut, and the two ends of the U-shaped tie bar are inserted into the rock wool board.

4. The method for producing a cold bridge-free rock wool sandwich aerated concrete block according to claim 1, characterized in that: The length of the cutting wire set in step 1 is greater than the length of the cutting surface on which it is located.

5. The method for producing cold bridge-free rock wool sandwich aerated concrete blocks according to claim 1, characterized in that: The ends of the cutting wires provided in step 1 are all provided with gripping parts.

6. The method for producing cold bridge-free rock wool sandwich aerated concrete blocks according to claim 1, characterized in that: In the step 2, the rock wool board is installed on the steel chisel through a clamping piece, and the clamping piece includes an upper splint, a plastic tube and a lower splint; the plastic tube passes through the rock wool board, and the position of the plastic tube is staggered with the position of the through hole, and an elastic chuck is provided at the top of the plastic tube; the upper splint and the lower splint are respectively arranged on two opposite cutting surfaces of the rock wool board, and a circular hole matching the elastic chuck is provided at the center of the upper splint, and the upper splint is connected to the upper end of the plastic tube through a spring chuck passing through the circular hole; a rectangular hole is provided at the center of the lower splint, and an elliptical plug is provided at the bottom end of the steel chisel, and the long diameter of the elliptical plug is larger than the short side of the rectangular hole and smaller than the long side of the mounting hole. The steel chisel passes through the plastic tube so that the elliptical plug passes through the rectangular hole of the lower splint, and the steel chisel is rotated 90 degrees and then locked. After the steel chisel locks the lower splint, a protective box is set on the elliptical plug.

7. The method for producing cold bridge-free rock wool sandwich aerated concrete blocks according to claim 6, characterized in that: The upper and lower splints are both U-shaped plates, and the distance between the side plates on both sides of the upper and lower splints is equal to the distance between the two bonding surfaces of the rock wool board; the upper and lower splints are made of hard and easily fusible plastic.

8. A cold-bridge-free rock wool sandwich aerated concrete block structure formed by the cold-bridge-free rock wool sandwich aerated concrete block production method according to claim 1, characterized in that: It includes a rock wool board and two layers of aerated concrete; the two opposite surfaces of the rock wool board with the largest area are bonding surfaces, and the other four surfaces are cutting surfaces, and the two aerated concrete layers are closely attached to the two bonding surfaces of the rock wool board; the four surfaces of the aerated concrete layer that are perpendicular to the bonding surface of the rock wool board are respectively flush with the corresponding cutting surfaces of the rock wool board; the rock wool board is provided with a plurality of through holes connecting the two bonding surfaces, and the through holes are provided with aerated concrete ribs integrally formed with the aerated concrete layer.

9. The cold bridge-free rock wool sandwich aerated concrete block structure according to claim 8, characterized in that: A steel bar connector is provided inside the aerated concrete rib, and both ends of the steel bar connector extend into two aerated concrete layers respectively; the steel bar connector includes a straight bar and a U-shaped tie bar arranged at both ends of the straight bar, a nut is provided in the middle of the U-shaped tie bar, and a thread head is provided at both ends of the straight bar. The U-shaped tie bar is fixed to the end of the straight bar through the cooperation of the thread head and the nut, and the two ends of the U-shaped tie bar are inserted into the rock wool board.

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