Patent Application
20210015141
The present invention is related to beans roasting, and more particularly to a roasting drum and a manufacturing method thereof.
Some of bean foods need to be roasted so they can easily show their flavor. Take coffee beans as an example, caffeine has a refreshing effect and gives off a unique aroma, which is loved by many people, so it has become a popular drink in society. Green coffee beans need to be roasted in a coffee bean roaster to have coffee beans ripened. The roasting process is to put coffee beans in a rotating drum under which a heating device is disposed to heat the drum so that the coffee beans are roasted in the drum. Since the heating device is located under the drum, the drum wall is heated directly, and the coffee beans contact the drum wall directly, which causes the coffee beans easily to get burnt black or scorched and consequently affects the taste of the coffee beverage.
To have coffee beans heated uniformly in the process of roasting, inside a drum of a conventional coffee bean roaster is usually provided with agitator blades. During the rotation of the drum, coffee beans are agitated by the agitator blades to keep them from contacting the drum wall for too long to be burnt black or scorched, which shows the importance of the agitator blades in a coffee bean roaster. However, the conventional method of disposing agitator blades in a drum is to place agitator blades in the drum first and then weld the agitator blades onto the drum. Due to the confined space of the drum, the agitator blades are not easy to fix and tend to displace in the welding process, resulting in the difficulty of precise welding between the drum and the agitator blades. Even if the agitator blades are successfully welded onto the drum, the welding position of the agitator blades may be not the same as the predetermined position and needs to be welded again after removing the weld, which causes inconvenience in installation and time consuming.
In view of the above, a purpose of the present invention is to provide a roasting drum and a manufacturing method thereof to have agitator blades precisely positioned in the drum.
The present invention provides a roasting drum including a drum body and at least one agitator blade. The drum body includes a drum wall which provides with at least one fixing hole, the at least one fixing hole passing through an inner surface and an outer surface of the drum wall. The at least one agitator blade is disposed in the drum body and is provided with at least one fixing convex part which passes through the at least one fixing hole.
The present invention provides a manufacturing method of a roasting drum, comprising the steps of:
providing a drum body which includes a drum wall;
forming at least one fixing hole that passes through an inner surface and an outer surface of the drum wall of the drum body;
providing at least one agitator blade which has at least one fixing convex part;
putting the at least one agitator blade in the drum body and disposing the at least one fixing convex part of the at least one agitator blade into the at least one fixing hole; and
fixing the at least one agitator blade on the drum wall of the drum body.
An advantage of the present invention is to have the agitator blades not easily displaced in the drum body by disposing the fixing convex parts of the agitator blades into the fixing hole and further fix the agitator blades onto the drum wall of the drum body so that the agitator blades can be precisely fixed at the predetermined positions.
The present invention will be best understood by referring to the following detailed description of some illustrative embodiments in conjunction with the accompanying drawings, in which:
The following illustrative embodiments and drawings are provided to illustrate the disclosure of the present invention, these and other advantages and effects can be clearly understood by persons skilled in the art after reading the disclosure of this specification.
As illustrated in
As shown in
As illustrated in
As shown in
When assembling, place the drum body 12 on a working platform first, and then put the agitator blades 20 into the drum body 12 one by one. Each of the agitator blades 20 is assembled in the same manner Take one agitator blade 20 as an example in the following description.
Target the fixing convex parts 24 of the agitator blade 20 at one group of the fixing holes 124 to pass each of the fixing convex parts 24 through the corresponding one fixing hole 124. The fixing convex parts 24 are exposed on the outer surface 122b of the drum wall 122. As shown in
Next, fix the agitator blades 20 to the drum wall 122 of the drum body to have the agitator blades 20 disposed at predetermined positions. In the current embodiment 12, the fixing convex parts 24 and the outer surface 122b of the drum body 12 are fixed to each other by welding from an outside of the drum body 12, wherein solder 18 connects the fixing convex parts 24 and the outer surface 122b of the drum wall. For a small-sized drum body 12 (an inner diameter thereof can be 3 to 6 inches), it is preferably being welded externally, but if the inner diameter of the drum body 12 is large enough to have a welding tool working inside the drum body 12, it is not limited to be welded externally. When being welded internally, it is not limited to being welded at the fixing convex parts 24 and may be welded at any proper positions between the blade body 21 and the inner surface 122a of the drum body 12.
As illustrated in
Further place the other end of the drum body 12 on the working platform to have the recesses 126 facing upward, and place each of the protrusions 14b correspondingly into each of the recesses 126. The outer circumference of the circular plate body 14a is surrounded by the inner surface 122a of the drum body 12. With two sides of each recess 126 for confining corresponding one protrusions 14b, each of the protrusions 14b is stably placed at a predetermined position to prevent the displacement of the end plate 14. Then, attach the end plate 14 and the drum body 12, for example, each recess 126 and a corresponding protrusion 14b are further attached by welding, so that each recess 126 and the corresponding one protrusion 14b are fixed well to each other. The step of attaching the end plate 14 and the drum body 12 can be performed before putting the agitator blades 20 into the drum body 12.
With the above steps, the roasting drum 100 as shown in
A roasting drum 200 of a second preferred embodiment of the present invention is shown in
When putting the agitator blade 30 in drum body 12, target the fixing convex part 34 of the agitator blade 30 at a fixing hole 40 of the drum wall 38 and place it into the fixing hole 40. Pass the connecting section 34a of the fixing convex part 34 through the fixing hole 40 of the drum wall 38 and the engaging section 34b of the fixing convex part 34 is exposed on an outer surface 38a of the drum wall 38. Move the agitator blade 30 forward to have a part of the drum wall 38 placed in the locking slot 36 so that the engaging section 34b is engaged against the outer surface 38a of the drum wall 38 to have the agitator blade 30 and the drum body 12 is not easily separated. Then, attach the engaging section 34b and the outer surface 38a by welding to have the agitator blade 30 welded fixedly at a predetermined position.
A roasting drum 300 of a third preferred embodiment of the present invention is shown in
In addition, a drum body attached to an agitator blade is not limited to a drum body having two open ends and may be a drum body having one end with an end plate.
In conclusion, the fixing convex part of the agitator blade and the fixing hole of the drum body of the present invention are attached to each other to be positioned, so that the agitator blade can be disposed at a predetermined position of the drum body, and the position of the agitator blade is not displaced even with the movement of the agitator blade or the drum body during assembly, so as to achieve the effect of precise positioning. The roasting drum of the present invention and the manufacturing method thereof are suitable for making drum bodies of various sizes, in particularly, small-sized drum bodies (inner diameters thereof are 3 to 6 inches) that are not easy for a user's hand or tool to reach into the drum body to hold an agitator blade are more suitable to use the manufacturing method of the roasting drum of the present invention.
The roasting drum of the present invention is not limited to the use of coffee beans, but is also applied to roast any granular food.
It must be pointed out that the embodiments described above are only some embodiments of the present invention. All equivalent structures which employ the concepts disclosed in this specification and the appended claims should fall within the scope of the present invention.
