Concrete mixer - an indispensable unit for domestic construction. It is used in the construction of a new building, minor repairs at the dacha. At the same time, it is not necessary to buy it in finished form. This equipment can be assembled by yourself using available tools and tools. When properly performed, a home-made electric mixer with an electric drive is capable of performing a high-quality kneading solution for a long time.
Self-made concrete mixer will save money on the purchase of industrial equipment, as well as the time spent on mixing concrete.
Types of concrete mixers and materials used
Self-made concrete mixers can be divided into 2 large categories: automatic and manual. The automatically controlled concrete mixer constructively provides for the presence of an engine, with the help of which the solution is kneaded. This greatly facilitates and speeds up the work, but at the same time making such a unit is somewhat more difficult. A manual concrete mixer is provided for preparing a small amount of mortar, since it is quite difficult to turn the whole structure manually. Therefore, in such a performance unit is rare.
Size table of concrete mixer.
Self-made concrete mixer can be of the gravitational type or forced mixing. In 1 case, the mixing of the solution occurs through the use of gravity. In case 2, concrete blades are used to produce concrete, which depends on the material, the size of the concrete mixer tank and its angle of inclination on the base frame. Self-made concrete mixers of vibration type use a drill and a special nozzle. But this type of mixing is most often used to knead less heavy solutions, for example, putty or plaster.
As the starting materials for the mixing tank, home-made concrete mixers use a metal barrel, a large cylindrical canister, a milk can, as well as an old washing machine.
The basis for home-made concrete mixers can serve as angles and channel bars, welded in a special way. The wooden structure, which is made of timber, is also reliable and fairly stable for this unit. But on the metal frame most often fix the wheels, which allows you to move the mixer on the construction site without much difficulty.
Drawing mixer: 1-frame; 2-pin locking pivot device; 3 rotary device; 4-electric motor; 5-gearbox; 6-pinion gear; 7-tub; 8-wheel; 9-pin wheel; 10 grounding; 11-restrictive chain; 12-mount engine; 13-lead pulley; 14 belt; 15-driven pulley; 16-bolt tension.
Wooden support implies being stationary in one place, which is not always convenient, especially if you want to concrete something at a considerable distance from it.
Regardless of the design, a home-made concrete mixer will require materials and tools such as:
- metal barrel with a capacity of not less than 200 liters;
- metal corners 45x45 mm;
- welding machine with electrodes.
Additionally, you may need grinder, drill, seals.Back to table of contents
Gravity type stationary concrete mixer
In order for the self-made concrete mixer to start its operation, it is necessary to choose the right capacity for mixing the mortar. As it is best to use a metal barrel of 100-200 liters, in which both bottoms are welded during production, and one of them has a cork. If the bottom of one of the sides is removable, then it will have to be welded using a welding machine, using the same metal to obtain a reliable welded joint.
Concrete mixer device.
Through the entire barrel it is necessary to pass a metal pipe, which will be the axis of the concrete mixer. However, it must be welded on both sides to the base of the barrel. Gaps in the joints should not be. It is desirable that the axis runs along the center of two bottom circles. This will ensure the stability of the mixer when mixing the solution.
As a base, a home-made concrete mixer can use a wooden shield or bars with a section of 150x150 mm, which are fastened together with self-tapping screws. If the base is not solid, then the rectangular base of the bar must be equipped with crossbars to give it the required rigidity and strength. The size of the base must be more than 50 cm on all sides from the side of the barrel, and more than 70 cm from the side of the concrete overturning. These dimensions allow the barrel not to roll over during operation.
The supports, which are attached to the axle of a home-made concrete mixer, are made of a metal corner, channel bar, profile, and boards. If the supports are wooden boards, then they are put together into a shield so that the next row of boards is at an angle to the previous one. Metal and wooden elements of the supports are provided with locks in which the axis of the unit is laid. As it can be used a pipe slightly larger than the axis, the size of the flanges or bearings. The height of the supporting structure should allow containers to be placed freely under it to collect the prepared concrete. Instead of a container, you can mount a metal shield with a slope, along which the ready-made solution will drain into a bucket or trough.Back to table of contents
To load the constituent materials for the solution in the barrel cut the window with a grinder.
The design of a manual concrete mixer from the barrel.
The same hole is used to unload the finished concrete. To cover for the hatch loading and unloading was sealed, it is made from a sheet of metal that follows the contours of the barrel. It is best to cut the desired segment of the barrel of the same size and shape with an increase of 10 cm from each of the edges. A rubber seal is stuck around the entire perimeter of the barrel. The cover is attached to the bolts to the barrel. To accelerate its opening bolts supply nuts. Such connection provides tightness and allows to avoid solution leakages in the course of work. You can use other methods of closing the hatch, for example, metal latches. They are fixed from 4 sides around the perimeter of the cover, snapping in, provide the required tightness of the container. The sealer should be replaced during wear.
Inside the barrel, the blades should be welded to its walls, which will not allow the components to simply flow along the inner surface while the barrel is rotating, and will contribute to the mixing of the components. They are made of metal and carefully welded. In this case, the design of the blades may be different. For example, it may be a metal strip with small legs, which are welded to the container. Their height should be such that the gap between the tank and the blade strip is 2-3 cm. This will allow not to accumulate sand or cement under them in the process.
For filling the foundation will be enough concrete mixer with a volume of 50 liters.
In addition to solid blades for kneading, you can use the design of the comb. It resembles a garden tool rake and is a metal corner, on which nails of various sizes from 7 to 10 cm are welded or attached to rivets. In addition to nails, you can use strips of strong metal 1.5-2 cm wide. These strips are welded to the corner. Nails or strips of metal need not be the same height. The placement of the blades should be symmetrical to avoid loosening of the unit during operation.
As a drive, self-made concrete mixers of this type can be used by motor-blocks, low-power two-stroke engines or even a bicycle drive. To do this, a pulley or gear is attached to the concrete mixer, and an engine is already attached to it.
To move a concrete mixer to another place, it is necessary to pull out the axle on which the pulley is not secured from the keylocks. Then the capacity can be transferred to a new location and reassembled on the base.Back to table of contents
Mobile concrete mixer: features
Construction of a home-made concrete mixer begins with the implementation of the basics. To do this, use metal corners with a length of 50 (4 pcs.), 70 (2 pcs.), 40 (2 pcs.), See. They are welded so as to form a reliable structure that can withstand the load when the unit is operating. Different lengths of segments due to the fact that the tank for mixing the solution must be mounted at an angle. Such its placement will allow to carry out a batch effectively.
Mobile concrete mixer is conveniently moved to different places where you need to make concrete mixing.
On one side of the base it is necessary to fix the wheels, which will allow the concrete mixer to be moved around the construction site.
On the resulting base mount gearbox, which is attached to the engine. The gearbox is installed capacity. For this design, you can use a barrel, in which the bottom is only from one side. Its capacity is 100-200 liters.
Capacity is mounted on a large pulley (gearbox). The small pulley is the gear. They interact with a belt.
To install the engine on the basis of a shelf made of metal angle. To protect the engine from possible ingress of the solution in the process of its unloading, as well as moisture when working with a concrete mixer, perform the motor housing. As it can serve as a box of sufficient dimensions, which is fixed to the bolts.
Self-made concrete mixers use handles to tilt the barrel with a solution. To do this, use a metal pipe, which is welded to the bottom.