RU222382U1 - Device for joint laying of construction mixture and reinforcing flexible mesh - Google Patents

Abstract

The utility model refers to devices that provide 3D printing with building mixtures with automatic internal reinforcement with mesh materials. Achieved technical result: construction 3D printing of a reinforced wall immediately, without the need for any additional reinforcement operations; construction 3D printing is faster and easier, due to the increased dimensional stability of the printed layer; reducing the load on the building mixture supply unit (concrete and mortar pumps) due to the increased dimensional stability of the printed layer, more mobile types of building mortars can be used; you can easily change the degree of mesh reinforcement by increasing the number of bends inside the printed layer; variable transverse profile. A device for joint laying of a building mixture and a reinforcing flexible mesh, containing a construction mixture supply unit, an extrusion die, characterized in that it additionally contains a housing that acts as a supporting frame, to which an extrusion die is fixed by means of a welding connection, connected by an adapter to the construction mixture supply unit , a mesh feeding and bending unit, fixed to the body by welding and consisting of nuts fixed on the shafts of the storage drum with a mesh amount sensor on the storage drum, feed rollers, one or more forming replaceable rollers, as well as mesh guides with a mesh breakage sensor , fixed by welding, a mesh trimming and cutting unit, fixed to the body using a bolted connection, consisting of knives and motors that provide movement along the Z and Y axes in coordinates according to GCODE, a rotary positioning unit, which is installed on the body and bolted connection.

Description

The utility model relates to devices that provide

3D printing with building mixtures with automatic internal reinforcement with mesh materials with minimal expenditure of time and materials;

dimensional stability of the printed layer, without the use of expensive types of materials, thanks to the use of mesh internal reinforcement. The predetermined shape of the mesh in the cross section allows you to print complex volumetric geometric solutions and can be used for printing load-bearing walls, partitions, statues, and architectural decor;

predictability of the characteristics and properties of the extruded composite, which significantly improves the quality and speed of printing. The increasing thermal and sound insulation characteristics of the printed wall make it possible to reduce the thickness of the insulation and simplify its installation.

A technical solution is known (patent for invention RU No. 2683447 Method for constructing a monolithic building, structure using 3D printing and a device for its implementation), according to which the device contains a dispensing head for layer-by-layer laying of filament of a building mixture, a device for rope reinforcement, scissors for cutting reinforcement, and a container for impregnation of fittings. The known design has a number of disadvantages. The device is not equipped with a rotation unit for the co-extrusion of the concrete mixture. Rope reinforcement will not be able to provide the required dimensional stability of the printed layer and printing of complex volumetric geometric solutions. Breaking the reinforcement with scissors during the printing process is unacceptable, as it reduces the strength characteristics of the printed layer.

These disadvantages are eliminated by the proposed technical solution. The main objective of the claimed utility model is to increase the strength and durability of the printed layer with minimal expenditure of time and materials due to the supply of the building mixture, due to the rotary-positioning unit, the unit for feeding and bending the reinforcing mesh, the unit for trimming and cutting the mesh, and the extrusion die.

In fig. 1 - a device for joint laying of a building mixture with automatic mesh reinforcement for construction 3D printers, differing from known solutions by the presence of:

1) a rotary-positioning unit, which is designed for rotation, rotational orientation relative to the Z axis of a construction 3D printer, which is installed on the body and secured with a bolted connection, can have various configurations, but in any case consists of at least:

1.1) bed;

1.2) belt/chain/gear/cable transmission mounted on the frame;

1.3) a servomotor or stepper motor with a rotation angle sensor, installed on the frame and fixed with a bolt connection.

Can work with a gearbox.

2. The mesh feeding and bending unit, which is designed to supply the mesh to the die and correctly bend the mesh, is fixed to the body by welding.

Comprises:

2.1) a storage drum with a mesh amount sensor on the storage drum;

2.2) feed rollers, the rollers may have corrugations for better grip of the mesh;

2.3) one or more forming replaceable rollers; the drum, feed and forming rollers are fixed with nuts on the shafts;

2.4) guides for the mesh with a mesh break sensor, fixed by welding.

The cross-sectional shape of the mesh depends on the characteristics of the printed layer. It can be U-shaped, trapezoidal, triangular, wave.

3. Mesh cutting unit, designed for partial or complete cutting of mesh. Fixed to the body using a bolt connection.

Comprises:

3.1) knives for cutting mesh;

3.2) motors that provide movement along the Z and Y axes. To change the movement to a significant angle of cutting the mesh, it uses knives and can (according to the program) partially or completely cut the mesh for easier bending, so that there are no uneven tensions of the mesh.

Technical result

1. Construction 3D printing of a reinforced wall immediately, without the need for any additional reinforcement operations.

2. Construction 3D printing is faster and easier, due to the increased dimensional stability of the printed layer.

3. Reducing the load on the construction mixture supply unit (concrete and mortar pumps) due to the increased dimensional stability of the printed layer, more mobile types of construction solutions can be used

4. The degree of mesh reinforcement can be easily changed by increasing the number of folds within the printed layer, changing the cross-sectional profile.

Implementation example

The device for joint laying of the building mixture and reinforcing flexible mesh (Fig. 1) consists of

1. Rotary-positioning unit, which is installed on the body and secured with a bolted connection;

1.1) bed;

1.2) belt/chain/gear/cable transmission fixed to the frame;

1.3) a servomotor or stepper motor with a rotation angle sensor, installed on the frame and fixed with a bolt connection.

Can work with a gearbox.

2. The unit for feeding and bending the mesh is fixed to the body by welding;

2.1) a storage drum with a mesh quantity sensor on the storage drum;

2.2) feed rollers, the rollers may have corrugations for better grip of the mesh;

2.3) one or more forming replaceable rollers; the drum, feed and forming rollers are fixed with nuts on the shafts;

2.4) guides for the mesh with a mesh break sensor, fixed by welding.

The cross-sectional shape of the mesh depends on the characteristics of the printed layer. It can be U-shaped, trapezoidal, triangular, wave.

3. Unit for trimming and cutting the mesh, fixed to the body using a bolted connection;

3.1) knives for cutting mesh;

3.2) motors that provide movement along the Z and Y axes. To change the movement of the device at a significant angle, the mesh cutting unit uses knives and can (according to the program) partially or completely cut the mesh for easier bending, so that there are no uneven mesh tensions .

4. Construction mixture supply unit. An adapter is used for connection.

5. Extrusion die, fixed to the body using a welding connection.

6. The housing, which acts as a supporting frame.

1) the mesh is wound onto the storage drum and tucked into the feeding and positional bending unit of the mesh;

2) a servomotor and a belt/chain/gear/cable rotation-positioning drive rotate our device to the starting angle. The rotation is carried out in the XY plane, around the Z axis of the robot. The rotation angle is additionally controlled by a rotation angle sensor;

3) the construction mixture supply unit is turned on, which pumps the construction mixture through the hose into the die. In the case of using a building mixture supply sensor, when the die is sufficiently filled and ready for printing, a signal is sent to the controller that it is ready for 3D printing. In its case, the start of printing begins after a certain time, corresponding to the complete filling of the hose with the building mixture;

4) immediately after the start, several actions are performed simultaneously. The robot moves the device in XY coordinates according to GCODE. The rotary positioning unit rotates the device around its axis according to GCODE. The mesh feeding and bending unit unwinds the reinforcing mesh from the storage drum using feed rollers and directs it to the forming roller or rollers running one after another, where the reinforcing mesh is bent. Next, the mesh enters the guides, which directly deliver the mesh to the die, where they are connected, i.e. the mesh is filled with construction mixture and is completely or partially covered with it. The mesh is fed in the direction of movement of the device. The construction mixture can be supplied both in the direction of movement of the device and perpendicular to it or at some angle;

5) if it is necessary to change the movement of the device at a significant angle, then the mesh cutting unit uses knives and can (according to the program) partially or completely cut the mesh for easier bending, so that there are no uneven tensions of the mesh;

6) if it is necessary to replace the mesh, then work is stopped, a new drum with mesh is installed, and all processes begin from the point where work was stopped.

Claims (1)

A device for joint laying of a building mixture and a reinforcing flexible mesh, containing a construction mixture supply unit, an extrusion die, characterized in that it additionally contains a housing that acts as a supporting frame, to which an extrusion die is fixed by means of a welding connection, connected by an adapter to the construction mixture supply unit , a mesh feeding and bending unit, fixed to the body by welding and consisting of nuts fixed on the shafts of the storage drum with a mesh amount sensor on the storage drum, feed rollers, one or more forming replaceable rollers, as well as mesh guides with a mesh breakage sensor , fixed by welding, a mesh trimming and cutting unit, fixed to the body using a bolted connection, consisting of knives and motors that provide movement along the Z and Y axes in coordinates according to GCODE, a rotary positioning unit, which is installed on the body and bolted connection.