JP2002079516A - Hopper dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a hopper dryer that a raw material is evenly dried. SOLUTION: In the hopper dryer, an inner basket, in which a funnellike vessel is formed into two-step constitution, is fitted to the lower part of the body of a drying vessel and a plastic raw material filling the upper part of the inner basket is dried by blowing hot air from the low part. The inner basket has a funnel shape each other and is divided into a first vessel 111 becoming the upper part and a second vessel 112 becoming the lower part. The first vessel has a first top face of area S1 and a second bottom face of area S2. The second vessel has a third top face of area S3 and a fourth bottom face of area S4. Size of respective faces is made to S1>S3>S2>S4 and the second face of the first vessel is inserted to the central inside of the third face of the second vessel and fixed by connecting means 114 crossed orthogonally so as to equip equal openings in the circumferential edges of both the inserted first vessel and the second vessel receiving the same. A conical up cover 115 is set in the central position on the orthogonal connection means existing on the base of the first vessel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hopper dryer for drying plastic resin.

[0002]

2. Description of the Related Art Raw materials for plastic resin processing are resin pellets, and it is common to use new pellets mixed with pulverized raw materials for recycle in addition to new pellets. In this case, powder in the process of pulverization is generated in the raw material for increasing the amount, and these are combined to become a resin raw material.

[0003] The above-mentioned resin raw materials need to be dried with hot air before use, and a hopper dryer is used as equipment for this purpose. The outline of hot air drying will be described with reference to FIG.

In FIG. 4, reference numeral 1 denotes a main body of a hopper dryer, which has a body 10 located at an upper part, a bottom part 11 located at a lower part, a fan 12 and a controller 13 for a heat source and the like. The part 13 is connected to the bottom part 11 via a connecting pipe 14.

Next, the inside of the main body of the hopper dryer will be described. Inside the funnel-shaped container, an upper portion (referred to as a first container) 111 and a lower portion (referred to as a second container) 112 are provided.
The upper part 111 is integrally assembled with the container of the lower part 112 by providing a uniform gap 113 around the lower part of the container in the upper part 111. That is, the upper part and the lower part are, for example, the shaft 11
By fixing each other by penetrating through each other, they are fixed to each other so that a uniform gap is formed around the periphery.

More specifically, the first container has a first surface having an area S1 serving as an upper surface and a second surface having an area S2 serving as a bottom surface. Has a third surface having an area S3 serving as an upper surface and a fourth surface having an area S4 serving as a bottom surface. The first to fourth surfaces are open (each surface is entirely open), and the sizes of the surfaces have a relationship of S1>S3>S2> S4. In addition, the second surface of the first container is inserted into the center of the third surface of the second container so that the peripheral edge between the first container and the second container has a uniform opening. They are fixed using connecting means orthogonal to each other.

During operation, pellets and an expanding material for recycling are fed into the hopper dryer from above. In this state, the switch of the control unit 13 is turned on,
As a result, when hot air is blown in the direction of the arrow in the figure, a gap 113 between the upper part 111 and the lower part 112 in a funnel shape is formed.
The hot air enters the funnel-shaped medium basket (the upper part and the lower part are collectively referred to as a medium basket) via the.

The hot air that has entered the middle basket is discharged to the outside through the upper air holes 101 along the paths a, b, and c, and at the same time is stirred in the body. After a lapse of a predetermined time, S
When W is turned off, the sufficiently dried raw material is discharged to the outside from below, and the discharged raw material is transported to a predetermined position by a transporting means (not shown).

[0009]

According to the above-mentioned conventional apparatus, the hot air that has entered the middle basket flows upward toward the center of the body 10 as shown by the arrow in the figure. There is little agitation of the raw material on the side wall side close to, and drying becomes uneven.

[0010] For this reason, there is a disadvantage that the drying of the raw material on the periphery in the body becomes insufficient. There is also a basket made of a net-shaped material, but in the case of this kind of material, the crushed powder that has entered for recycling in the mesh is clogged,
This will reduce the efficiency for separation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a hopper dryer in which raw materials in a body can be uniformly dried.

[0012]

According to a first aspect of the present invention, there is provided a hopper dryer in which a basket having a funnel-like container in a two-stage configuration is attached to a lower portion of a drying container main body, and the upper portion of the basket is filled. In a hopper dryer that blows hot plastic air from below to dry the plastic material, the middle basket has the following configuration (a), (b), (c), (d), and (e). (A) It is divided into a first container having a funnel shape and serving as an upper portion and a second container serving as a lower portion, and (b) the first container has a first area S1 having an upper surface. And a second surface having an area S2 serving as a bottom surface, and the second container also has a third surface having an area S3 serving as an upper surface and a fourth surface having an area S4 serving as a bottom surface. (C) the first to fourth
Are open, and the size of each surface is S1> S3
>S2> S4, (d) inserting the second surface of the first container into the center of the third surface of the second container, and inserting the inserted first container and Is fixed using a connecting means orthogonal to each other so as to have a uniform opening around the periphery of the second container receiving the second container, and (e) a conical shape is formed at a central position on the orthogonal connecting means on the bottom surface of the first container. Place the top lid.

[0013]

FIG. 1 is a structural view showing an embodiment of the present invention, in which an inner basket comprising an upper container (first container) 111 and a lower container (second container) 112 is shown. It is the perspective view which took out and showed only the part. In FIG. 1, the same parts as those in FIG. What is newly provided in the present embodiment is the upper lid 115, and the other configuration is the same as that of FIG.

The upper lid 115 has a conical overall shape, and a notch 116 is formed at a position obtained by dividing the bottom surface into four equal parts. When this notch is placed and fixed on connecting means orthogonal to each other, it occupies the central position of the bottom surface of the first container, and a gap is formed on the periphery thereof. The connecting means fixes and positions the mutual position of the upper container 111 and the lower container 112, and forms a gap 113 around the periphery thereof.
It is a shaft provided for providing a.

That is, the two shafts 114-1 and 114
-2 is orthogonal to the opening surface of the opening 117 of the container having a funnel shape. Therefore, when the four notches 116 of the upper lid are engaged with the orthogonal shaft, the shaft occupies the central position of the opening.

Although the mounting state of the middle basket is not described, if the connecting means 15 for fixing the body 10 and the bottom 11 is opened, the whole basket can be taken out upward. In addition, in the case of fixing, when the middle basket is inserted inside in the open state, the flange 118 on the peripheral edge of the upper portion is formed so as to come to the upper peripheral edge of the bottom portion 11. If the part 10 is placed and the fixing means 15 is fastened, it is firmly fixed.

In the above, the material of the upper container or the lower container constituting the middle basket is not particularly described. However, the description is made on the premise that a zinc cage or the like is used, for example. In the conventional example, the material is usually a net-like material or is formed by a perforated iron plate, etc. This is because the.

Next, the operation will be described with reference to FIG.
In this case, the flow of the dry air will be described. In FIG. 2, when hot air is blown into the bottom portion 11 through the connecting pipe 14, hot air filled in a range surrounded by a peripheral edge of the lower container 112 and a peripheral edge of the upper container 111 loses a place to go. , Flows into the lower container 112 via a gap 113 provided in the peripheral edge of each container.

The hot air that has flowed into the lower container 112 rises upward at the center thereof, but cannot be directly flowed upward due to the upper lid 115 at the upper center position. Therefore, the hot air hitting the upper lid 115 is equally diverted to the peripheral edge, and overflows to the upper peripheral edge via the opening 117 between the central upper lid and the bottom surface of the upper container.

Moreover, the overflowing hot air spreads and diverges at a stretch along the funnel-shaped inclined surface of the upper container and the inclined surface of the upper lid located at the center of the heated air, so that the hot air is evenly diffused into the body 10. I do. As a result, the raw materials inside are dried evenly.

FIG. 3 shows a state in which the drying is stopped after a predetermined time and the raw material is discharged. That is, the dried raw material is distributed to the periphery by the conical top lid 115,
Here, the sorted materials are discharged downward via the lower container 112.

[0022]

As described above, according to the present invention, a conical upper lid is provided at the center of the opening of the upper container forming the middle basket, and the opening is formed on the peripheral edge of the conical upper lid. Is provided, the hot air overflowing from the opening thereof is diffused at a stretch, and the raw material in the body can be dried uniformly.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing the operation of the drawing.

FIG. 3 is a diagram illustrating discharge of raw materials.

FIG. 4 is a diagram illustrating a conventional device.

DESCRIPTION OF SYMBOLS 1 Hopper dryer body 10 Body 11 Bottom 12 Fan 13 Control unit 14 Connecting pipe 111 Upper container 112 Lower container 113 Void 114 Shaft 101 Air hole 115 Top lid 116 Notch 117 Opening 118 Flange 15 Connection means

Claims (1)

[Claims] 1. A hopper dryer in which a basket having a funnel-shaped container in a two-stage configuration is attached to a lower portion of a drying container main body, and the plastic raw material filled in the upper portion of the basket is blown up with hot air from below to dry. The hopper dryer is characterized in that the basket has the following configuration (a), (b), (c), (d), and (e). (A) It is divided into a first container having a funnel shape and serving as an upper portion and a second container serving as a lower portion, and (b) the first container has a first area S1 having an upper surface. And a second surface having an area S2 serving as a bottom surface, and the second container also has a third surface having an area S3 serving as an upper surface and a fourth surface having an area S4 serving as a bottom surface. (C) the first to fourth
Are open, and the size of each surface is S1> S3
>S2> S4, (d) inserting the second surface of the first container into the center of the third surface of the second container, and inserting the inserted first container and Is fixed using a connecting means orthogonal to each other so as to have a uniform opening around the periphery of the second container receiving the second container, and (e) a conical shape is formed at a central position on the orthogonal connecting means on the bottom surface of the first container. Place the top lid.