RU2814226C1 - Dough kneading machines of continuous action - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention relates to equipment for production of pasta products, in particular, to dough kneading machines of continuous action for kneading crumb-like dough mass. Dough kneading machine contains a loading branch pipe, a horizontal working chamber with two working shafts equipped with scraper and kneading blades, a drive. Drive consists of a motor, a V-belt transmission, gear transmissions, a crank, a double-arm lever, a cam and a roller. Machine is equipped with traction. Traction is connected by one end to the double-arm lever, and by the second end to the single-arm lever. Single-arm lever is fixed on working shaft and has common axis with it.

EFFECT: invention increases efficiency of the mechanism and simplifies the design.

1 cl, 1 dwg

Description

The present invention relates to equipment for the production of pasta, in particular to continuous dough mixing machines for kneading crumbly dough mass.

Existing designs of mixing devices operate mainly in stationary conditions, i.e. at constant angular velocity of the working body. At the same time, there are zones in mixers where there is little or no movement of material, so the quality of the finished product is reduced. When the mixer is operating, the speed of the mixture after some time becomes equal to the speed of the mixer working body. As a result, the mixture moves layer by layer: particles of components with a larger mass move in orbits of a larger radius, and particles of a smaller mass move in orbits of a smaller radius. which negatively affects the mixing process (formation of dough lumps, i.e. unkneading). When a variable angular velocity is communicated to the working body, the actual instantaneous speed of the working shaft is the sum of the time-average value of the flow velocity and the deviation of the actual speed from the average. In this case, the process of transition of the elementary masses of the mixture from top to bottom occurs, which helps to improve the quality and intensity of the mixing process. This mode of movement allows you to achieve a homogeneous kneading of the dough; for this it is advisable to use mixers with variable speed of rotation of the kneading body. This problem is solved by using drive mechanisms that ensure uneven rotation of the mixer working body.

A continuous dough mixing machine is known [RU 2752158 C1, A21C 1/06], containing a flour dispenser, a trough-shaped working chamber and a working shaft with kneading blades placed in it along its axis. The disadvantage of this dough mixing machine is the unsatisfactory quality of the knead.

In addition, a continuous dough mixing machine [FR 2161690 (A5)] is known, containing a loading pipe, a horizontal working chamber in which two working shafts with kneading blades are installed, rotating and reciprocating, and a drive. The drive consists of a motor that transmits rotational motion to the operating shafts through a belt drive and a two-stage gear transmission, and reciprocating motion through a single-stage gear and worm transmission and a cam mechanism.

The disadvantages of this dough mixing machine include the following: during machine downtime, the crumbly dough mass in the working chamber is compacted; restarting the machine is difficult, and in some cases impossible, due to increased loads on the kneading blades. Consequently, there is a need to unload the crumbly dough mass from the working chamber. Upon subsequent startup, it takes time to load the working chamber with crumbly test mass and the machine to enter a stationary mode, which reduces productivity.

A known continuous dough mixing machine [a.s. No. 2455826, RF, A21C 1/06], which contains a loading pipe, a horizontal working chamber with two working shafts with kneading blades, a drive consisting of an engine, a mechanism for imparting rotational motion to the working shafts, including a belt and two-stage gear drives, and a transmission mechanism for communicating reciprocating motion to the shafts, consisting of a single-stage gear and worm gear and a cam mechanism. In this case, a safety clutch is installed on the shaft between the worm and the gear wheel of a single-stage gear transmission. This design of the dough mixing machine makes it possible to increase its productivity by reducing downtime caused by the need to unload the compacted crumbly dough mass from the working chamber, its subsequent loading and the machine entering a stationary mode.

The disadvantage of this dough mixing machine is due to the complexity of the kinematic chain, which provides for longitudinal movement of the working shafts, which imposes restrictions on increasing its productivity.

A continuous dough mixing machine (RU 2752158С1) was selected as a prototype, which contains a loading pipe, a horizontal working chamber with two working shafts equipped with scraper and kneading blades and a drive consisting of an engine, a V-belt drive, gears, and for communicating with the working shafts rotary motion with variable speed, the drive is equipped with a transmission mechanism, including a crank, one end of which is connected to the driven shaft of the gear transmission, and the other carries a double-arm lever, on one of the arms of which there is a roller, and on the other - a block placed in the groove of the rocker, an axis rotation of which is common with the working shaft, and the working shaft is connected to the working shaft by means of a gear transmission.

The disadvantages of this dough mixing machine, which includes a rocker group, are the increased friction of this pair, leading to a decrease in the overall efficiency of the machine, and the necessary exhibition condition for the moment the cracker enters the groove of the rocker.

The objective (technical result) of the proposed invention is to increase efficiency and simplify the design by eliminating the rocker group, which has increased friction.

The stated task (technical result) is achieved by the fact that a continuous dough mixing machine containing a loading pipe, a horizontal working chamber with two working shafts equipped with scraper and kneading blades, and a drive consisting of an engine, a V-belt drive, gears, a crank, and a double-arm lever , cam, roller, a rod is introduced, one end of which is connected to a double-arm lever, and the second end to a single-arm lever mounted on the working shaft and having a common axis with it.

In the drawing FIG. Figure 1 shows a kinematic diagram of the proposed device. The proposed machine contains an engine (1), a V-belt drive (2), gears (3, 12), a crank (4), a double-arm lever (5), a rod (6), a single-arm lever (7), a working shaft (8), roller (9), cam (10), working shafts (11, 13), scraper blades (14), kneading blades (15).

The machine works as follows. The movement from the engine (1) through a V-belt (2) and gear transmission (3) is transmitted to the crank (4), which drives the double-arm lever (5) into rotation, one of the arms of which carries a roller (9) placed in the groove of the stationary cam (10), and the second shoulder transmits movement to the single-arm lever (7) through a rod (6) to the operating shaft (8). From the shaft (11) through gearing (12) the movement is transmitted to the working shaft (13). Scraper blades (14) and kneading blades (15) are installed on the working shafts (11, 13).

The technical result of the proposed invention is to simplify the design and increase efficiency by reducing friction pairs.

Claims (1)

A continuous dough mixing machine, characterized in that it has a loading pipe, a horizontal working chamber with two working shafts equipped with scraper and kneading blades, and a drive consisting of a motor, a V-belt drive, gears, a crank, a double-arm lever, a cam and a roller, Moreover, to increase the efficiency of the machine drive, it is equipped with a rod connected at one end to a double-arm lever, and at the other end to a single-arm lever mounted on the working shaft and having a common axis with it.