JP3288439B2 - How to make powdered tea - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing powdered tea used, for example, by enclosing it in a tea bag.

[0002]

2. Description of the Related Art Conventionally, powdered tea sealed in a tea bag made of filter paper has generally used a small one produced in a process such as kneading.

[0003]

However, in this conventional powdered tea, the size of the particles is not only relatively large, about 0.5 to 3 millimeters, but also the surface of the particles is relatively smooth. Therefore, there is a problem that the extraction efficiency is low when the tea is made in a state where the tea is sealed in a tea bag or the like.

[0004] For this reason, it is necessary to enlarge the tea bag and enclose a large amount of powdered tea, and there has been a problem that the manufacturing price per pack becomes high. The present invention has been made in view of the problems existing in such a conventional technique, and a first object of the present invention is to make a powdered tea having a high extraction efficiency and enclose it in a tea bag. It is also an object of the present invention to provide a method for producing powdered tea which can be produced at a low cost by only enclosing a small amount of powdered tea in a small tea bag.

[0005] A second object of the present invention is to seal the opening of the tea bag without enclosing the powder tea in the sealing portion of the tea bag when the tea is sealed in the tea bag. An object of the present invention is to provide a method for producing powdered tea in a tea bag that can be worn.

[0006]

To achieve pre-Symbol purpose SUMMARY OF THE INVENTION In the present invention, the raw material tea and impact crushed powdery
To make powdered tea and to enclose the powdered tea, both ends of the sheet
To the sheet feeding direction while sealing
Seal at right angles sequentially, and insert at the entrance to supply powdered tea.
It is characterized by sealing while sending a.

[0007]

[0008]

According to the present invention, when powdered tea is sequentially enclosed,
Because tea is pushed in the supply direction by air,
Powdered tea is mixed into the bag's sealing area, resulting in poor sealing.
Can be reliably prevented.

[0009]

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a powdered tea manufacturing apparatus embodying the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the frame 1 is fixed on a support base 3 via a leg portion 2 and a mounting cylinder 5 is provided at a lower portion thereof for mounting a storage bag 4 in a detachable manner. Have been. The casing 6 is fixed on the frame 1,
A supply port 7 is provided on the peripheral side, and a discharge port 8 that opens into the mounting cylinder 5 is provided on the center lower surface. The lining plate 9 is provided on the inner peripheral upper surface of the casing 6, and a number of ridges 10 are arranged on the inner surface. The screen 11 is disposed on the inner peripheral lower surface of the casing 6 and extends along the discharge port 8 in an arc shape.

The rotating shaft 12 is rotatably supported in the casing 6 via a bearing 13, and a rotating disk 14 is fixed to an intermediate portion thereof. The plurality of hammers 15 are rotatably supported on the periphery of the rotating disk 14 by a support shaft 16. When the rotating disk 14 rotates, the hammer 15 is radially extended by centrifugal force, and is opposed to the ridge 10 of the lining plate 9 with a small gap (in the embodiment, 1 mm or less). You. Pulley 17 is rotating shaft 12
The rotating shaft 12 is rotated at a high speed (16000 rpm in the embodiment) through the belt and the pulley 17 by a main motor (not shown).

The screw shaft 18 is rotatably supported in the supply port 7 via a bearing 19, and a worm gear 20 is provided at the shaft end. The worm 21 is meshed with the worm gear 20, and the worm 21 and the worm gear 20 are driven by a supply motor (not shown).
, The screw shaft 18 is rotated. The hopper 22 is connected to the upper end of the supply port 7.
The raw tea stored therein is supplied into the casing 6 through the supply port 7 as the screw shaft 18 rotates. Then, with the rotation of the hammer 15, the raw tea collides with the ridges 10 of the lining plate 9 and is beaten by the hammer 15. For this reason, the raw tea is subjected to impact crushing to produce powdered tea powder.

A cooling water supply passage 23 is formed inside the peripheral wall of the casing 6, and has a water supply port 24 at one end and a drainage port 25 at the other end. Then, when the cooling water is supplied from the water supply port 24 to the drain port 25 through the supply path 23, the internal temperature of the casing 6 becomes a predetermined temperature (5 to 7 in the embodiment) suitable for the production of powdered tea.
° C).

An exhaust pipe 26 is provided above the mounting pipe 5, and a blower (not shown) is connected to the exhaust pipe 26. Then, with the rotation of the blower, a suction force is applied from the exhaust pipe 26 to the inside of the casing 6 through the discharge port 8, and the powdered tea produced in the casing 6 is passed through the screen 11 by the suction force. 4 is accommodated by suction.

Next, the production of the powdered tea having the above-described structure will be described. By the way, during operation of this manufacturing equipment,
The belt and pulley 17 are driven by a main motor (not shown).
The rotating shaft 12 is rotated at a high speed in the counterclockwise direction in FIG. 1 through the shaft, and each hammer 15 on the rotating disk 14 is extended radially by centrifugal force. For this reason, the tip of each hammer 15 is rotated at a high speed while maintaining a small gap with respect to the ridge 10 of the lining plate 9. On the other hand, the screw shaft 18 is rotated by a supply motor (not shown) via the worm 21 and the worm gear 20, and the raw tea in the hopper 22 is supplied into the casing 6 through the supply port 7.

As a result, the raw tea collides with the ridges 10 of the lining plate 9 and is beaten by the hammer 15 to be impacted, crushed, atomized, and turned into powdered powdered tea. Then, the powdered tea is sucked and stored in the storage bag 4 through the screen 11 from the discharge port 8 by a suction action of a blower (not shown).

At the time of producing the powdered tea, the water supply port 24
The cooling water is supplied to the drain port 25 through the supply path 23 from the, and the internal temperature of the casing 6 is maintained at a predetermined temperature of 5 to 7 ° C. For this reason, the internal temperature of the casing 6 does not increase with the high-speed rotation of the hammer 15, and it is possible to reliably prevent the raw tea and the powdered tea from being exposed to high temperatures and deteriorated.

Therefore, according to the manufacturing apparatus of this embodiment,
The powdered tea has a fine particle size of about 3 to 100 microns and does not have a rounded grain shape. In addition, the surface of each particle is roughened by impact crushing, and the surface area is increased. For this reason, the size of the conventional particles is about 0.5 to 3 millimeters, and compared to powdered tea having a smooth surface,
The efficiency of extracting tea powder can be greatly improved to about 200 to 500%. Therefore, when this powdered tea is used by being sealed in a tea bag, a small amount of powdered tea may be sealed in a small tea bag, so that it can be manufactured at low cost.

FIG. 7 is a magnified (500 ×) photograph of powdered tea produced by the production method of this embodiment. As is clear from this enlarged photograph, the powdered tea particles have a rough surface and a large surface area. FIG. 8 is an enlarged photograph of matcha that is apparently similar to powdered tea according to the manufacturing method of this embodiment (500 on the left side).
The right side is a photograph in which the white frame on the left is magnified 5 times with a photograph. Since matcha is manufactured using a stone mill, the surface is smooth as is clear from the enlarged photograph of FIG. FIG.
The total length of the white line displayed at the lower left of the enlarged photograph of FIG. 8 is 55.5 microns.

By the way, the particle size of the powdered tea is determined by rotating shaft 1
It can be adjusted by changing the rotation speed of 2, the number of hammers 15, the supply speed of raw tea by the screw shaft 18, the pitch of the ridges 10 of the lining plate 9, the mesh of the screen 11, and the like.

An apparatus for enclosing the powdered tea manufactured as described above in a tea bag will be described. As shown in FIGS. 3 to 5, the winding shaft 31 is rotatably supported by a frame (not shown), and a filter paper P as a band-shaped sheet is provided on the outer periphery thereof.
Is wound. A hot-melt adhesive that melts at a high temperature of 150 ° C. or higher is applied to one surface of the filter paper P. The guide roller 32 is disposed on the side of the winding shaft 31, and the filter paper P unwound from the winding shaft 31 is
It is guided and transported along the guide roller 32. The guide plate 33 is disposed below the guide roller 32, and the filter paper P is transported along the guide plate 33 to be folded from the flat state with the adhesive applied surface inside. .

A pair of vertically sealing rollers 34 is rotatably disposed near the lower end of the guide plate 33. When the vertically sealing roller 34 is rotated in a heated state, the folded filter paper P is folded. Is sealed by heating to form a vertical sealing portion S1 in the same portion. A pair of horizontal sealing rotation plates 35 are rotatably disposed below the vertical sealing roller 34, and the horizontal sealing rotation plate 35 is rotated in a heated state,
The middle portion of the filter paper P is heat-sealed at predetermined intervals, and a horizontal sealing portion S2 is formed in the middle portion. A plurality of tea bags B are sequentially formed by the sealing portions S1 and S2.

The supply tray 36 is disposed on the side of the guide plate 33, and a hopper 37 is provided above the supply tray 36.
The supply pipe 38 is connected to the bottom of the supply tray 36, and its tip extends downward through the guide plate 33. Then, a vertical sealing portion S1 and a lower horizontal sealing portion S are attached to the filter paper P.
In the state in which 2 is formed, the powdered tea T stored in the hopper 37 is supplied into the tea bag B via the supply tray 36 and the supply pipe 38.

The air pipe 39 extends along the supply pipe 38, and has a base end connected to an air supply source (not shown). When the opening of the tea bag B is sealed by forming the horizontal sealing portion S2 in a state where the powdered tea T is supplied into the tea bag B, the air pipe 3
9, air is supplied into the tea bag B in the same direction as the supply direction of the powdered tea. As a result, the powdered tea T is pushed downward in the tea bag B, and the possibility that the powdered tea T is mixed and interposed between the upper horizontal sealing portions S2 to cause a sealing failure is prevented.

The rotary blade 40 is rotatably disposed below the horizontal sealing rotary plate 35, and has a saw-toothed blade portion 41 at both ends. The die 42 is disposed to be opposed to the side of the rotary blade 40.
1 and the die 42 cooperate to form a perforation D on the horizontal sealing portion S2.
Is formed.

Next, the operation of the production of the powdered tea in the tea bag constructed as described above will be described. During the operation of the manufacturing apparatus, the filter paper P is unwound from the winding shaft 31 and transported along the guide plate 33, so that the filter paper P is folded from a flat state to a folded state. In addition, with the heating rotation of the vertical sealing roller 34, a vertical sealing portion S1 is formed on the side edge of the filter paper P in a folded state. Further, with the heating rotation of the rotating plate 35 for horizontal sealing, horizontal sealing portions S2 are formed at predetermined intervals in an intermediate portion of the filter paper P, and the tea bag B
Are formed.

In a state where the vertical sealing portion S1 and the lower horizontal sealing portion S2 are formed on the filter paper P, the powdered tea T in the hopper 37 is supplied to the tee 37 via the supply tray 36 and the supply pipe 38. Supplied in bag B. Thereafter, when the opening of the tea bag B is sealed by the formation of the horizontal sealing portion S2, the air flows into the tea bag B through the air pipe 39.
, And the powdered tea T is pushed downward in the tea bag B. Therefore, the upper side sealing portion S
Powder tea T is not interposed between the two, and it is possible to reliably prevent the possibility of poor sealing occurring in the horizontal sealing portion S2 due to the mixing of powder tea T.

It should be noted that the present invention is not limited to the configuration of the above-described embodiment, but may be arbitrarily changed without departing from the spirit of the present invention, for example, by appropriately changing the configuration of each of the above-described manufacturing apparatuses. It is also possible to make it concrete.

[0030]

According to the present invention, as described above , when powdered tea is sequentially enclosed, the powdered tea is
Because it is pushed in the supply direction by air,
Powder tea mixed into the sealing part of the
This has an excellent effect that it can be reliably prevented .

[0031]

[0032]

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing one embodiment of a powdered tea manufacturing apparatus embodying the present invention.

FIG. 2 is a partial cross-sectional view taken along line XX of FIG.

FIG. 3 is a partial sectional view of an apparatus for enclosing powdered tea in a tea bag.

FIG. 4 is a partially enlarged sectional view taken along line YY of FIG. 3;

FIG. 5 is a partially enlarged sectional view taken along line ZZ of FIG. 3;

FIG. 6 is a partially enlarged front view showing a state in which powdered tea is sealed in a tea bag.

FIG. 7 is a micrograph showing the particle structure of powdered tea produced by the production method of the present invention.

FIG. 8 is a micrograph showing the particle structure of matcha apparently similar to powdered tea produced by the production method of the present invention.

[Explanation of symbols]

6 ... casing, 9 ... lining plate, 10 ... ridge, 11 ... screen, 14 ... rotating disk, 15 ... hammer, 18 ... screw shaft, 33 ... guide plate, 3
7: Hopper, 38: Supply pipe, 39: Air pipe, P
... filter paper, S1: vertical sealing part, S2: horizontal sealing part, B: tea bag, T: powdered tea.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A23F 3/00 B65D 85/50

Claims (1)

(57) [Claims] 1. A method for producing powdered powdered tea by subjecting raw tea to impact crushing.
And seal both ends of the sheet to enclose the powdered tea.
Direction perpendicular to the sheet feeding direction while forming into a cylinder
, And send air to the entrance where powdered tea is supplied.
A method for producing powdered tea, characterized in that sealing is performed while sealing .