This is the simplest manual concrete mixer do-it-yourself, requiring a minimum of cost and effort in the manufacture. However, the quality of the prepared mixture in such a device can be called nothing more than satisfactory, and large volumes of the solution in it cannot be made.
And yet, with relatively small needs in the solution, given the simplicity and cheapness, such a concrete mixer with his own hands is quite widely used in the performance of construction work on personal plots.
Structurally, its scheme is a horizontally disposed, closed container with an opening door through which components are supplied.
For more convenient use of a gravitational-type concrete mixer, it is installed on a welded support frame.
As a container you can use a metal can or an ordinary steel barrel. After laying the necessary materials through the door, it is tightly closed, and the capacity begins to rotate with the handle. After mixing, the gravitational-type concrete mixer turns the door down, and the ready-made mortar falls out through it into the substituted pan.
Self-made concrete mixer with their own hands of mechanical type looks very similar to gravity. The main difference is inside her.
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These are guides and cutting blades welded to the inner walls of the container. They direct the fall of the overturned seams, cutting them into separate parts.
In this case, dare will be obtained better and in a shorter time. The presence of blades changes the very principle of gravitational mixing. Therefore, the working capacity can be positioned not only horizontally, but also at an angle, which allows a more efficient use of the volume of the concrete mixer and makes the work more convenient.
Schematic representation of a mechanical concrete mixer.
In addition, the working tank, installed at an angle to the horizon, no longer requires a resealable pressure cap, and the ready-mix can be dumped through a constantly open hole, turning the working tank itself.
Manufacturing working capacity
As a working tank, you can also use a steel barrel, to the inner walls of which steel blades should be welded at an angle of 30-35 degrees. The height of the blades should be equal to a quarter of the diameter of the barrel. The option of welding blades to a rotating shaft, passing inside.
A more complicated option would be to make a container of your own design, such as homemade. For this, you will need a piece of thin-walled steel pipe with a wall thickness of 2.5-3.5 mm, a diameter of at least 800 mm and a length of at least one meter.
The support frame is best made from steel tubes.
One side of the pipe is welded with a steel circle. On the other hand, 4-6 triangular segments are cut out, which fold to the middle and weld together. The result is a container resembling a pear. Inside the pear, the blades are welded, and in the center, on the outside of the bottom, there is a steel axis for the subsequent fastening of the drive pulley.
They are less prone to bending than the corner, and have a relatively small weight. The design of the frame should provide for the installation of support wheels, on which the container will lie, and a platform for the installation of the electric motor.
The frame itself should consist of two parts:
- support, which will hold the whole structure;
- rotary on which the working capacity will lean.
Support frame with handle and wheels.
The supporting and turning parts of the frame are interconnected through short shafts fixed in bearings or bushings.
It is necessary to weld the transverse handle to one of the shafts in order to be able to tilt the rotary part of the frame, and with it the working capacity, which will lie on the frame, leaning on the castors.
Drive Mechanical Concrete Mixer
The drive for rotating the mixer in devices of this type is extremely rare and only with a small volume of working capacity. Usually for rotation use an electric motor connected to a mixer through a belt drive.
It is even better to connect the electric drive through a reducer, but a concrete mixer made by hand will be too expensive in terms of the necessary components. In the factory constructions, it is possible to see a gear transmission from the engine, installed on the side of the tank, in the place of the largest diameter, but with independent production, this solution is only theoretically feasible.
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Vibration type concrete mixer
Vibration devices are widely used in the industrial preparation of mortars and concrete mixtures, since they provide the best quality of the final material. They are very simple in their design, and then make them your own hands quite easily.
During operation, the components begin to actively mix, and water is gradually added until the required degree of solution density is obtained. At the end of the process, a hatch is opened in the lower part of the tank, and the finished mixture falls into the pan or car body.
Structurally, such a concrete mixer is a fixed container located vertically. In the upper part, the necessary components are loaded for preparing a mortar or concrete, a certain amount of water is added and an immersion vibrator is lowered in the middle.
If you already have your own immersion vibrator or you have the opportunity to purchase it, then it will not be difficult to make such a concrete mixer yourself. It does not have moving and rotating parts, it is not necessary to reinvent the drive and pivoting frame design, but simply install the improved barrel design on the support frame and position the receiving sump at the bottom.
The main difficulty in the operation of such a structure is the need to ensure a stable position of the vibrator. In order for the finished mixture to be of high quality, it is necessary to position the vibrator strictly in the center of the volume occupied by the prepared solution, and mix it all at the same time.
At the industrial enterprises for this purpose use a special lowering design on which the working mechanism is fixed.
If you decide to use a steel barrel as a working tank, then, first of all, you must remove the bottom and the lid from it. After that, you need to make a truncated cone of steel sheet, the larger diameter of which must be equal to the diameter of the barrel, and the opening gate is welded to a smaller diameter. You can buy it or make it from existing corners and a steel plate with a handle – then you will get it for free. Weld the cone made to the barrel, and the working capacity will be ready.
Now you need to install the container on the support frame, the height of which will allow the receiving pan to be located under the concrete mixer. It is best to install it with a slight slope or to feed it into the solution along the receiving chute, and install the tray itself nearby.
Making a decision to make a concrete mixer with your own hands, it is necessary to understand that in order to make it you will need to perform a large amount of welding and plumbing work. You must have these skills or have an assistant who can do it. It will also be nice to look at the network for additional photos and videos, having familiarized with the experience already accumulated by other people.
The work should begin with the definition of materials already available. On the basis of such a revision, it is necessary to make drawings or a sketch of the future device. After that, acquire all the missing materials and tools, and then proceed to manufacturing.
How to make a concrete mixer do it yourself: a step by step guide with diagrams and drawings
Concrete mixers come in all different sizes, as they are needed for the production of concrete and on an industrial scale, and for home use. The principle of operation of the most ordinary apparatus is quite simple. However, technology does not stand still, and such units are also being improved. For example, there are devices with two shafts that make better-quality concrete, and it is also more convenient to use them for large volumes of batches. If we talk about home use, then there are recommendations on how to make a concrete mixer with your own hands.
Video: homemade concrete mixer
The essence of the work and varieties of concrete mixers
A device that helps to mix cement, aggregates, and water until smooth, is called a concrete mixer. After the ingredients are fed into her drum, mixing begins. Its duration is set by the user, and the result is a concrete mix.
By the principle of operation, the equipment is:
- with forced mixing;
- with gravitational mixing.
The first option assumes that the capacity of the machine does not move, but the mixture of a blade of a particular shape is stirred.
In gravitational machines, the drum rotates, and the blades are located inside it. Due to their method of installation, repeated falling and raising of the mixture, the mass reaches the desired condition. Such units are notable for the fact that they can be used to mix both mortar and hard concrete mixtures.
Manual concrete mixer can be made from barrels
Important characteristics of the unit
Today there are various options for such technology. For example, enterprises need huge mobile mixers. At home, such equipment is not required. For small batches there are special mini concrete mixers. They are powered by electricity, and the drum is attached to the base on wheels. Therefore, it is convenient for the user to move the unit around the site. In addition, a convenient design and the fact that the capacity can be rotated on a horizontal axis to unload the concrete on the wheelbarrow.
To improve the efficiency of the mixer, you must put the motor
Based on the size of the equipment, as well as the volume of the mixture, which it prepares at one time, the choice is made when buying a device. Because sometimes it is necessary that the concrete mixer is not only easily transported, but also placed in cramped conditions.
Finally, there is a technique with additional convenient features. For example, there are units that independently load raw materials into the drum, and then unload the concrete mix. Such devices do not require the application of physical labor, facilitating the construction process.
What is needed for the manufacture of concrete mixers with their own hands
Since almost any construction work requires the use of mortar, this technique has a very wide application. For example, concrete mixes are needed when building a blind area of a house and pouring a screed, making a foundation and in many other situations. Many have attempted to knead the solution by hand. But this work is very hard, and it is impossible to guarantee the quality of the concrete.
Many craftsmen make concrete mixers with their own hands
Although the market has a large number of proposals for such equipment, many craftsmen are interested in the question of how to make a concrete mixer. If there is a necessary minimum of tools and certain construction skills, then it is possible to implement such a project independently.
What is needed for a homemade concrete mixer:
- capacity for solution;
- two bearings;
- drive shaft;
- elements for the frame, blades;
- electric motor.
A metal or plastic barrel can be used as a tank in which the solution will be stirred. Its volume should be from 200 liters. For the drive shaft often choose a conventional metal pipe or rod, and for different parts of the design fit trimming fittings, angles, channel.
Since the operation of the main power module, the installation electric motor, is very important, it is recommended to use a drive motor that will provide a rotation speed of 1500 revolutions per minute at a rated power of 2200 W. It is necessary to take into account such a moment as the speed of rotation of the drive shaft. It should not exceed 48 revolutions per minute. Therefore, an additional gearbox or corresponding belt drive pulleys will also be required.
The process of manufacture and assembly of the device
In the bottoms of the barrel it is necessary to make holes into which the shaft will be inserted and through which you can firmly fix the tank with bolts. To make the hatch for loading ingredients, cut a hole on the side. It can be a rectangle with dimensions 24×30 cm.
Scheme for the manufacture of the simplest mixer
On the edges of the hatch paste a soft rubber, and then the lid of the hole and the barrel are connected through the bolts with hinges. As an option, card loops are used. The most important thing is to ensure that the manhole cover fits snugly while the concrete mixer is operating. Fix it to help metal corners on the coupling bolts.
Preparing a barrel, inside it establish a crosspiece. For this, metal corners or channels are used. This element is welded, leaving a gap between the walls of the tank and the structure of not less than 10-15 mm. It will help to mix the solution more evenly.
From metal corners make a detail that will help facilitate the process of freeing the barrel from the solution. The design for tipping the concrete mixer also complements the mechanism for transporting the unit.
Since the concrete mix cannot be stored inside the tank, it is calculated that the homemade unit does not exceed a volume of 7-8 liters of the finished solution.
Proportions for the preparation of concrete mix
It is not enough to make a concrete mixer with your own hands, you need to know how to properly prepare the cement mortar.
Homemade concrete mixer through the eyes of a humorist
In order to prepare one cubic meter of concrete, you need 125 liters of water. This is a defining moment, since excess liquid promises a reduction in the strength of the final product.
In addition to water, sand with grains up to 5 mm in the amount of 30-45 percent of the total mass is necessary. Another 55-70 percent is gravel. Thus, the ratio of sand to gravel is 1: 1.2. If, instead of the latter, to use crushed stone, then it will need more: 1: 2.
It is important to consider that high-quality concrete requires the use of clean sand and water. For example, contamination by oils or aggressive substances is excluded. In summer, cold water is used, and in winter, it is heated to 40 degrees.
Good luck to you in all construction matters!
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Sources: http://nashgazon.com/instrument/inventar/kak-sdelat-betonomeshalku-svoimi-rukami-video-i-chertezhi.html, http://protrotuarnujuplitku.ru/beton/samodelnaya-betonomeshalka-svoimi-rukami. html, http://101dizain.ru/texnika/betonomeshalka-svoimi-rukami.html