MXPA98005615A - Dough hook and a food mixer - Google Patents

Abstract

A dough hook (50) for a planetary mixer (10) which comprises a shaftportion (52) for attaching said hook (50) to a mixer head (30) and a hook portion having a plurality of points located on a common edge of said shaft.

Description

MASS HOOK AND A FOOD MIXER BACKGROUND OF THE INVENTION The present invention relates to a dough hook and an apparatus for mixing dough when using this hook, and more particularly, this invention relates to a mixer having a dough hook configured in such a way that a novel relationship is produced between the dough hook and the inner surface of a mixing bowl. Industrial and domestic mixers are well known for mixing foods. From these foods, you can knead dough in these mixers with the substitution of dough hooks rotating instead of conventional blenders. However, already # that the dough is dry and relatively heavy, it is very difficult to mix. Therefore, place heavy loads in the mixer. Overloading when mixing heavy mass is a major problem, which causes the engine to overheat, break down, and oscillate on / off buttons. The heavy mass mix also leads to other problems such as transmission failure, bowl support breakdown, and other electrical problems such as capacitor and switch faults. The process for mixing dough consists of two actions. The First, it is a mixing action to incorporate the ingredients. The another is a kneading action to develop the dough. The dough will get more energy through the kneading action and its temperature and elasticity rise in the process. Planetary mixers have been shown to provide both mixing and kneading actions. A planetary arrow presents m mixing action while a stirring arrow presents kneading action. Therefore, an object of the present invention is to modify the m icing machine to improve its reliability and reduce its load when m icing mass. Another object of this invention is to improve the design of the dough hook in order to reduce the maximum load when mixing heavy dough and to minimize the additional mixing time required to obtain the same dough quality. This will increase the life of the mixer and reduce the time.

BRIEF DESCRIPTION OF THE INVENTION The space between the mass hook of the mixing apparatus and the bowl plays an important role in the development of mass. If there is a lot of space, then the hook does not effectively reach the mass and the mass needs a much longer time to incorporate and develop. But if there is very little space, the hook pinches the dough very hard against the bowl. This requires a lot of horsepower from the engine, causes very high load on all parts of the mixer, and wears out energy due to the pinch of the dough instead of the desired kneading action.

Therefore, the dough hook of the present invention is of a helical shape and angled so as to improve the space between the reach of the hook as it rotates and the internal periphery of the bowl. The space is such that it minimizes the load on the machine.

BRIEF DESCRIPTION OF THE DRAWINGS ^ Figure 1 is a planetary mixer that exemplifies the present invention; Figure 2 is a conventional dough hook; Figure 3 is a representation of the space between the reach of the dough hook of Figure 2 and the inner surface of a bowl; Figure 4 is a dough hook in accordance with the present invention; Figures 5, 6, 7, 8, 9, 10, 11 and 12 are several cross-sectional views of the dough hook of the present invention; and Figure 13 is a representation of the space between the reach 20 of the dough hook of Figure 4 and the inner surface of a bowl.

* DETAILED DESCRIPTION OF THE PREFERRED MODALITY This system will now be described in detail with respect to the figures. It should be understood that the above general description and the following detailed description are examples and explanations but should not restrict the invention. The accompanying drawings that are incorporated in and constitute a part of this invention, illustrate the "embodiments of the invention, and, together with the description, serve to explain the principles of the invention in general terms. similar numbers refer to similar parts throughout the description. Any type of planetary mixing machine known in the art can be used. However, the invention will be described with respect to the mixing machine 10 exemplified in Figure 1 This mixer machine includes a housing 12 having a base 14, a support structure 16 and an arm 18 exiting the upper end of the support structure. The base 14 is formed by two pairs of separate legs 20. The support structure 16 extends vertically from the base 14 and the arm 18 comes out horizontally of the support structure on the space between the pair of legs 20. The arm 18 carries a mounting member 22 for a mixing tool. The mixer 10 further includes an arc bowl holder 24 mounted to the support structure 16 The bowl holder 24 is semicircular in shape and defines a cavity to support a removable, complementary bowl 26 containing the substance to be mixed. The support 24 holds the bowl 26 a distance from the surface 28 on which the feet 20 rest.

The arm 18 houses supports and means of reduction and transmission system appropriate as are known in the art that are driven by a motor housed in the structure 16. The mixer also includes a mixing arrow that is driven by the motor and is adapted to receive the mixing tool. The impulse system may include an epi-cyclic or planetary gear whereby the arrow rotates on its own axis and, at the same time, rotates around a main vertical axis. The mixer 10 also includes a mixing abutment driving head 30, an auxiliary abutment door 34 and a shift cam assembly 36. The mixing abutment driving head 30 extends from the assembly 22 of the arm 18 and is bonded to a drive train that drives the attachment. This driving head drives the removably mounted dough hook. The bowl holder 24 supports the mixing bowl 26 under the mixing abutment driving head 30. The lever 38 is rotatably mounted in the housing 12 and used to raise and lower the bowl 26 in position under the driving head of the bowl. Mixing additive 30. Mixers are in a variety of size capacities. The volume of each of the bowls varies accordingly and is determined by the height of the wall of the bowl. Each of the bowls curves upward in a slightly concave configuration. In Figure 2 a conventional dough hook 100 is shown. It is one of a pair that act together to knead the dough. The 5 hooks are formed so that when turning, the dough being kneaded is forced down from the hooks, thus preventing the dough from rising on the hooks towards the housing. The hook 100 is helical in shape and has a proximal end 102 that connects * removably to an accessory attachment 30 of a head mixer, and a distal end 104 that exits in the bowl and is rolled up slightly. Along the length of the hook, the cross section is angular and changes. The dough hook of a mixer of 18.93 liters is provided with a propeller having a conduction of approximately 7.78 cm with a rotation of 0 ° at point A, which is i > approximately 35 ° on the horizontal line. The hook is between about 30.87 cm and about 31.19 cm long. The second hook is not shown. One hook has a right helical profile and the other has a left helical profile that is a mirror image of the right hook. The propellers overlap as they rotate. Figure 3 shows the space between the reach of the dough hook 106 (ie, the point of the hook 100 that is closest to the inner periphery of the bowl as the hook rotates) and the internal curvature of the bowl 108 for a conventional mixer with a capacity of 18.93 liters. The distance from the center line of the bowl 110 to the center line of the dough hook 1 12 is 4.65 cm.

Point A is in the plane of the bowl, perpendicular to and 3.47 cm from the proximal end 102 of the hook. Point F is closer to * bowl bottom and is approximately 31.036 cm from the end. Point F is approximately 0.95 cm from the inner periphery of the bowl. Point G is on the roll. 10 As can be seen, the space at points C, D and E in the middle portion of the bowl, where the upper part of the mass would be, is relatively small. As explained above, this requires excessive force to move the dough and greatly reduces the life that can be used from the mixing machine.

The dough hook 50 of the present invention for a similar mixer with a capacity of 18.93 liters is shown in Figure 4. It has a spiral shape similar to the conventional dough hook 100 shown in Figure 2. However, the shape has been altered so that the space between the reach of the hook 56 as it rotates and the internal surface of the bowl 58 is maximized with respect to the minimum required energy of the mixer and the ability to mix maximum. Another difference is that the rolled end 54 is longer, for better incorporation of flour. This dough hook has a helix that has a 7.78 cm pipe as in the conventional hook of Figure 2. It has a 0 ° rotation in the C-C section, which is approximately 35 ° on the horizontal line. The hook is between about 30.87 cm and about 31.19 cm long as in the conventional hook. The cross-sectional views of the helical arrow portion of the dough hook are shown in Figures 5-12 taken at points 5-5, 6-6, 7-7, 8-8, 9-9, 10-10. , 1 1 -1 1 and 12-12, respectively. The cross sections have a common edge. Figure 13 shows the space between the reach 56 of the dough hook 50 and the inner edge 58 of the mixing bowl. The points A-G are in the same rotation and distance from the proximal end 52 as in Figure 3. All distances have tolerances of = 0.127 cm. However, since the rolled portion of the hook 54 is longer, an eighth point H is shown to rotate 394 ° from point A and is 2.33 cm from the lower portion of the hook at point F.

As can be clearly seen by contrasting figures 3 and 13, the space between the reach of the hook and the bowl is less at point B where there is usually no mass, but much longer at points C, D and E. distance at point C from the center line of the dough hook at range is 8.81 cm compared to 9.32 cm from the dough hook of the prior art. At point D, the distance from the center line of the mass hook within reach is 7.62 cm versus 8.73 cm from the mass hook of the prior art. these two examples are for a bowl of 18.93 liters, however, the space will be proportional for mixers with larger capacity and mixers with smaller capacity (ie, larger mixers should have a larger space and smaller mixers will have more space little). However, for a mixer of 18.93 liters, the space of the smaller portion should not exceed approximately 1 .78 * cm. For a mixer of 22.71 liters the dimensions of hook are the following ± 0.127 cm: # For a mixer of 0.946 liters the dimensions of the hook are the following ± 0.127 cm: - éfa__ EXAMPLE Different doughs were used including medium bread dough, * 40% pizza dough, 50% pizza dough, and salty cookie dough in a 18.93 liter mixer. A comparison chart is in the box below. The table shows the extended life of the main parts of the mixer (arrows, gears, supports and hooks) in different loads when using the hook of the present invention in comparison with the mass hook of the prior art. For life analysis of arrow, gear and hook, the fatigue stress theory is used: Sf = aN; where Sf = material fatigue stress a = (0.9 Su,) 2 / Se b = -1/3 log ((0.9 Su,) / Sß) b = -0.0851 for steel (Su / Se = 2) b = 0.139 for aluminum (Sut / Se = 32/1 1) N = cycles Se = fatigue limit of material Su (= stress of material tension for the calculation of support: L2 / L1 = (F1 / F2) a; where 1 = old 2 = new L = life F = force a = 3 (constant for ball supports) - # ß This table shows the extended life of the main parts of the mixer (arrows, gears, supports and hooks) in different loads. Several times the test could not be completed to mix 50% pizza dough with the conventional dough hook since there were many starting windings that could damage the test equipment. Even the mass that is not very heavy, damaged the unit when the old hook was heavily used. Some of the results recorded that the new hook required w_w a longer mixing time. However, the hook of the The present invention greatly increases the reliability and duration of the mixer. After having described the invention in detail and by reference to preferred embodiments thereof, it will be apparent that modifications and variations are possible without departing from the scope of the invention. scope of the invention defined in the appended claims. #

Claims (10)

1. - A dough hook for a planetary mixer comprising: an arrow portion for fixing said hook to a mixing head; and a hook portion having a plurality of points located on a common edge of said arrow, ~ 5"said points being approximately the following:

2. The dough hook according to claim 1, wherein said dots are located approximately as follows:

3. - The dough hook according to claim 1, wherein an external reach of said hook portion of said dough hook and an internal surface of a companion mixing bowl define a space and said space is less than or equal to about 1.78 cm for a mixer of 18.93 liters.

4. The dough hook according to claim 3, wherein said space is relatively larger for mixers of larger quantity and relatively smaller for mixers of small quantity.

5. The dough hook according to claim 1, further comprising points such as the following:

6. - The dough hook according to claim 5. wherein said hook has a divided profile based on the previous points.

7. - A dough hook for a planetary mixer comprising: an arrow portion for fixing said hook to a mixing head; and a hook portion having a plurality of points located on a common edge of said arrow, said points being approximately the following:

8. - The dough hook according to claim 7. wherein said points are approximately the following:

9. - A dough hook for a planetary mixer that includes: an arrow portion for securing said hook to a mixing head; and a hook portion having a plurality of points located on a common edge of said arrow, said points being approximately the following:

10. - The dough hook according to claim 9, wherein said points are approximately the following: 1 1 .- A mixer for mixing dough comprising: a housing portion of said mixer; a mixing bowl disposed removably in said housing; a mixing head fixed to said housing and driven by a motor; at least one dough hook mounted on said mix kneading head contained in said mixing bowl, said dough hook having a helical portion, wherein an external reach of said helical portion of said dough hook and an inner surface from said mixing bowl form a space, said space being of a quantity small enough to effectively mix the dough, but not so small to pinch the dough to a degree that said motor oscillates the on / off buttons and overheats. 12. The mixer according to claim 1, wherein said hook has a right helical profile. 13. The mixer according to claim 1, wherein said hook has a left helical profile. 14. The mixer according to claim 13, wherein a second hook has a right helical profile that is a mirror image of said left profile. 15. The dough hook according to claim 1, wherein said space is less than or equal to about 1.78 cm for a 18.93 liter mixer. 16. The dough hook according to claim 1. wherein said hook portion has a trapezoid cross section. # 17. The dough hook according to claim 9, wherein said hook portion has a trapezoid cross section. 18. The dough hook according to claim 7, wherein said hook portion has a trapezoid cross section. ^^ L