JPS61124427A - Air mixing conveyor of bulk material - Google Patents

Abstract

PURPOSE:To simplify the structure and facilitate the operation and production by conveying an invariably stable quantity of pellets to a molding machine from a hopper drier in an air mixing conveyor of pellets such as a plastic material. CONSTITUTION:A pellet outlet pipe 12 extending directly downward is formed in one body with the bottom section of a hopper drier 10, and the lower end opening edge of this pellet outlet pipe 12 is formed so as to be inclined against the horizontal line. When the hopper drier 10 is operated, pellets dried and processed in the drier 10 are dropped into a pellet receiving box 13 through the pellet outlet pipe 12. The pellets dropped into the box 13 are pushed and moved toward the opening section 17 of the pellet outlet pipe 16. Then, when a blower 23 is driven, the pressure air fed by pressure into the box 13 via a pressure air inlet pipe 14 is fed into a hopper 18 via an opening section 15, the outlet pipe 16, and a conduit pipe 21, and both the pellets and air are fed by pressure.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is particularly concerned with processing granular raw materials (pellets), such as plastic raw materials, under complete drying together with dry air (2). This invention relates to an air mixing transfer device for granules.

[Background of the invention]

Most of the glass raw materials used for molding plastic products are pellets, but if these pellets contain moisture, they will hydrolyze and deteriorate the resin, causing molded products to deteriorate. The strength and toughness decrease, and as the water content increases, the fluidity of the molten resin increases;
In the mold, overfilling and generation of flakes occur, which adversely affects the shape accuracy and surface gloss of the molded product. Transfer to the molding machine (2).

However, in the conventional pellet transfer device, as shown in FIG. 4, a pellet storage chamber 2 is provided at the bottom of the hopper dryer 1, and a pressure air supply pipe 6 and a pressure air supply pipe 6 are installed on the side of the pellet storage chamber 2. A delivery pipe 4 facing the entry pipe 6 is provided, and at the other end of the pressure air delivery pipe 3, a flow branch port 6a of a flow divider 6 having a pressure air introduction pipe 5 is provided.
Connect. In addition, a bypass pipe 8 having an air volume control valve 7 is connected between the other branch port 6b and the delivery pipe 4, and in this device, the pellets 9 dried in the hopper dryer 1 are , inside pellet storage chamber 2 (
= When it is full, when a pressure blower (not shown) is driven to supply pressurized air into the flow divider 6, a part of the pressure air inside the flow divider 6 passes through the pressure air supply pipe 3 and is stored in pellets. The pellets 9 in the chamber 2 are transferred together with the pressurized air to a molding machine (not shown) via the delivery pipe 4. In addition, in order to send other pressurized air in the flow divider 6 to the delivery pipe 4 via the bypass pipe 8, it is necessary to operate the air volume control valve 7 provided in the bypass pipe 8. It is possible to adjust the amount of pellets 9 to be delivered from the delivery pipe 4 (;) from inside the storage chamber 2.

However, in our facility, which starts a pressure blower to feed the pellets 9 accumulated in the pellet storage chamber 2 into the delivery pipe 4, we use a relatively strong pressure air. (2. Air volume control valve 7
When the pellets 9 in the pellet storage chamber 2 are sequentially delivered, appropriate pellets 9 can be sequentially transferred to the delivery pipe 4 using relatively weak pressure air. Since the air volume control valve 7 needs to be moved in the direction of opening, it is necessary to operate the air volume control valve 7 each time the operation is started and when the operation continues, and the operation of the air volume control valve 7 is troublesome. . Further, since the structure of this device is complicated, there are problems such as the assembly of the device and equipment costs are high, and furthermore, it takes time and effort to clean the inside every time the pellets are replaced.

[Purpose of the invention]

The present invention has been made to solve these problems, and has a simple structure, easy maintenance, and allows a stable amount of pellets to be transferred from the hopper dryer to the molding machine at all times. The object of the present invention is to provide an air mixing transfer device for powder and granular materials.

[Embodiments of the invention]

The present invention will be explained in detail below based on the embodiments shown in FIGS. 1 to 3.

Reference numeral 10 denotes a dryer dryer for drying the pellets 11. Since this hopper dryer 10 can selectively use one having a well-known structure, a structural explanation of the internal structure of the hopper dryer 10 will be omitted. .

A pellet outlet pipe 12 extending directly downward is integrally formed at the bottom of the hopper dryer 10, and the opening edge of the lower end of the pellet outlet pipe 12 is formed so as to maintain an inclination of an angle α with the horizontal line. has been done. Reference numeral 16 denotes a cube-shaped pellet receiving box that is integrally formed with the pellet outlet tube 12 so as to wrap around the lower end of the pellet outlet tube 12, and the lower tip 12' of the pellet outlet tube 12 is horizontal. - The inner bottom surface of the pellet receiving box 16 (which is located on the upper side of the inside side of the pellet receiving box 16, that is, the upper part of the dorsal side of the inclined pellet outlet tube opening edge) A pressure air introduction pipe having an opening 15 and 16
teeth.

This pellet outlet tube has an opening 17 at the other side inside the pellet receiving box 16, that is, at the lower part of the opening side of the inclined opening edge of the pellet outlet tube. 18 is attached to the upper part of the forming fi 19, and the pellet inlet 20 provided in this hopper 18 and the pellet outlet pipe 16 are connected by a conduit 21. In addition, the air outlet 22 and the pressure air introduction pipe 14 are connected by a conduit 21' having a blower 26 in the middle. It is something that has been done.

In addition, 24 is inside the hopper 18 (two filters provided, 25
indicates a damper.

The above is the structure of this embodiment. As shown in FIG. Because it is pushed out in the direction of the opening 17 (
2. The pellet 11 is moved to the vicinity of the opening 17.

Therefore, when the blower 26 is driven, the pressure air introduction pipe 14
The pressurized air is fed under pressure into the pellet receiving box 16 through the opening 15 and the pellet outlet pipe 16. conduit 2
1 and into the hopper 18 (2), but when the air in this pellet receiving box 16 is about to be sent from the opening 15 to the pellet outlet pipe 16, the pellets have been moved to the vicinity of the opening 17. 11 is smoothly and continuously pumped with air into the conduit 21 and supplied into the popper 18 (two times).

That is, by driving the blower 26, the pellets 11 dropped into the pellet receiving box 16 are supplied into the popper 18 from the opening 17 through the pellet outlet pipe 16 by the action of pressurized air from the blower 23. The amount of pellets supplied into the hopper 18 can be adjusted by adjusting the amount of pressurized air supplied from the blower 26 (from the second point).

Can be adjusted. Also, from the pellet outlet pipe 12,
Pellet 1 dropped into pellet receiving box 16
1 is located near the opening 17 of the pellet outlet pipe 16, and even if the blower 26 is stopped, the pellets 11 will not be filled inside the pellet receiving box 16 (2), so the pellet transfer starts.

Even if stops are made frequently, the pellets 11 can be smoothly transferred in appropriate amounts. In addition, since the configuration of the device according to Example 1 is simplified compared to the conventional one, the economical efficiency of the device as a whole is increased, and the inside of the device is easy to clean, making management and maintenance easier. There are also advantages in this respect.

[Summary of the invention]

As described above, the present invention has a pellet receiving box 16 provided so as to enclose the lower end opening of the pellet outlet pipe 12 provided in the lower part of the hopper dryer, and an open end inside the pellet receiving box. A pressurized air introduction pipe 14 and a pellet ejection pipe 16 are provided, the opening ends of which are arranged at substantially symmetrical positions (=disposed) with the pellet ejection pipe 12 as a boundary, and furthermore, the lower end opening of the pellet ejection pipe 12 is This is an air mixing and transporting device for powder and granular material, characterized in that the opening is opened at an opening inclination angle α toward the opening 17 of the pellet outlet pipe 16.

〔Effect of the invention〕

Therefore, the pressure air introduction pipe 1 of this powder air mixing transfer device
41 and the pellet outlet pipe 16 to the popper 18 of the molding machine and drive the blower, the pellets dropped into the pellet receiving box 13 are moved by the action of the pressurized air from the blower. This has the effect that the pellets in the pellet receiving box 16 can be smoothly supplied to the molding machine from the pellet outlet pipe 16. Further, the lower end opening of the pellet outlet pipe 12 is connected to the pellet outlet pipe 1
Since the opening of the box 6 is inclined to open in the direction of the opening 17, even if the blower 23 is stopped, the pellet receiving box 16 is not filled with pellets, so it is difficult to start or stop the pellet transfer. Even if it is carried out frequently, it has the effect of smoothly transferring and supplying the appropriate amount of pellets.Furthermore, this device (=) has a simpler structure compared to conventional ones, so it is easier to manufacture. It has advantages such as ease of management and maintenance.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an embodiment of the device according to the present invention in a state of use, Fig. 2 is a perspective view of only the above-mentioned device, Fig. 3 is a sectional view thereof, and Fig. 4 is an explanatory diagram of a conventional example. be. 10... Hopper dryer 11... Pellet 12... Pellet outlet pipe 16... Pellet receiving box 14... Pressure air introduction pipe
15... Opening 16... Pellet outlet pipe
17...Opening 18...Hopper 1
9... Molding machine 20... Pellet introduction port 2
1.21'... Conduit 22... Air outlet
26... Blower 24... Filter
25-...Danbarmo 25th- Taku 31 Kakeru Prisoner

Claims (1)

[Claims] A pellet receiving box 13 is provided so as to enclose the lower end opening of the pellet outlet pipe 12 hanging below the hopper dryer, and the pellet receiving box has an open end, and the open end is connected to the pellet outlet pipe 12. A pressurized air introduction pipe 14 and a pellet outlet pipe 16 are provided, each of which is disposed at a substantially symmetrical position with respect to 12 as a boundary, and the lower end opening of the pellet outlet pipe 12 extends toward the opening of the pellet outlet pipe 16. An air mixing and transferring device for powder and granular material, characterized in that the opening is at an inclination angle α.