JPH1110641A - Apparatus for drying/screening resin pellet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize the cooling and drying of high temperature granules sent from a granulator with a single facility and, at the same time, the screening of granules except the granules having a predetermined size. SOLUTION: In this device, a box 17 is elastically supported on a base by means of four springs or front, rear, left, and right springs. Within the box 17, a coarse-meshed sieve 31 and a fine-meshed sieve 32 are supported in two stages or upper and lower stages. Further, a loading aperture 9a, through which high temperature granules as a pellel stock is loaded, is provided on the upper side of the basic end pat of the box 17. In addition, a first chute 21 is provided in the under side midway of the fine-meshed sieve 32, a second chute 27 is provided at the tip part of the fine-meshed sieve 32 and a third chute 28 is provided at the tip part of the coarse-meshed sieve 31. To a space between the bottom plate 8 of the box 17 and the fine-meshed sieve 32, the air plenum 17 of a blower 10 is connected. Furthermore, on the under surface of the bottom plate 8 of the box 17, avibrator 7, which gives oblique upward vibrations towards the tip side of the box 17, is held.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for drying and sorting granular pellet raw materials for obtaining a resin molded product by a resin molding machine, and more particularly to a method for cooling and drying a high-temperature granular material from a granulator to a size other than a predetermined size. For drying and sorting resin pellets.

[0002]

2. Description of the Related Art In general, a molded product made of synthetic resin (plastic) is formed from a granular synthetic resin material called a pellet by an injection molding machine or the like. Is added and kneaded with a kneader at a temperature lower than the molding temperature, and the kneaded viscous material is granulated by a granulator or the like. The granules are cooled and dried, and then sieved to remove pellets larger than a predetermined size (some of the particles are solidified in a dumpling) and powdery particles smaller than a predetermined size to form a pellet. .

Conventionally, granular materials from a granulator are sequentially processed by a cooling / drying machine and a sorting machine, so that the equipment becomes large, a large installation space is required, and the equipment cost increases. is there.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to cool and dry high-temperature granules from a granulator in a single facility, and to simultaneously cool and granulate high-temperature granules having a size larger than a predetermined size. It is an object of the present invention to provide a highly efficient and inexpensive resin pellet drying and sorting apparatus which can sort and remove the resin pellets.

[0005]

In order to solve the above-mentioned problems, the structure of the present invention elastically supports a box on a base with four front, rear, left and right springs, and has two coarsely arranged upper and lower surfaces inside the box. A sieve and a fine sieve are supported, and an input port for inputting a high-temperature granular material that is a pellet raw material is provided above the base end of the box,
A first shot is provided on the lower half of the fine sieve, a second shot is provided at the tip of the fine sieve, and a third shot is provided at the tip of the coarse sieve. Connecting the outlet of the blower to the space between the bottom plate and the fine sieve,
A vibrator, which applies an obliquely upward vibration toward the front end side of the box, is supported on the lower surface of the bottom plate of the box.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, high-temperature granules pneumatically conveyed from a granulator are received by a hopper of a cyclone type separator, air is discharged outside the hopper, and the granules are vertically separated into two stages. Into the base end of the coarse and fine sieves, vibrating the sieve in a diagonal direction with a vibrator, removing those above a predetermined size from the granular material with the upper sieve, and below the predetermined size Is removed by the lower sieve. At the same time, air is sent from the lower side of the sieve to the upper side by a blower, and the granules on the sieve are cooled and dried. Of the granular materials, those having a predetermined size or more are discharged to the end of the upper sieve, and those having a predetermined size or less are dropped in the middle of the lower sieve and discharged to the side, and those having the predetermined size are discharged to the lower side. It is discharged as resin pellets from the end of the sieve.

[0007]

1 is a side sectional view showing a schematic configuration of a resin pellet drying and sorting apparatus according to the present invention, and FIG. 2 is a line 2A of FIG.
FIG. 2B is a rear sectional view of the apparatus for drying and sorting resin pellets according to -2A. The resin pellet drying and sorting apparatus is provided with spring supports 3a and 4a at the upper ends of two pairs of front and rear support legs 3 and 4 supported on the base 2, and the box 17 is connected to the spring supports 3a and 4a via springs 5 and 6. Supported. The spring receiver 4 a is screwed and supported on the support leg 6 so as to be vertically adjustable, and corrects the inclination of the box 17.

The box 17 is composed of a pair of left and right side walls 42, a base wall 41, a front wall 44 and a bottom plate 8. Box 17
A duct 16 formed at the intersection of the bottom plate 8 and the base end wall plate 41 is connected to the outlet 14 of the blower 10 via a flexible tube 15. When the impeller 13 supported by the rotating shaft 12 is rotated by an electric motor (not shown), air is sucked in from the suction port at the axial end of the blower case, and is blown out from the outlet port 14 to the duct 16. ing.

[0009] An electromagnetic or unbalanced weight rotary type vibrator 7 is supported on the lower surface of the bottom plate 8 via a pair of support plates 17b.
The vibrator 7 applies vibration in the direction of the arrow x to the box 17. The upper side of the base end portion of the box 17 (from the base end wall plate 41 of the box 17 to the upper side of the shot 26) is covered by the top plate 9, but the tip side of the box 17 is opened upward. . An outlet pipe 24 protruding downward from the hopper 23 is inserted into the input port 9 a provided in the top plate 9. The high temperature and soft granular material pneumatically conveyed from the granulator is supplied from the inlet 21 of the cyclone type separator 20 to the inside of the hopper 23, and only air is discharged to the outside from the air outlet 22 of the upper end wall of the hopper 23. The granular material is put into the base end of the box 17 from the outlet pipe 24 of the hopper 23.

An intermediate bottom plate 25 facing the top plate 9 is provided on the base end side of the box 17, and a first short 26 projecting to the side of the box 17 is provided at the tip of the bottom plate 25. Box 1
In front of the intermediate wall plate 43 at the front end of the front end 7, a second shot 27 protruding laterally is provided. Tip wall plate 44 of box 17
A third shot 28 is formed between the second wall member 43 and the intermediate wall plate 43. Inside the box 17, a coarse sieve 31 having a U-shaped cross section is disposed on the upper side, and a fine sieve 32 is disposed on the lower side. Sieve 3
Although the base ends of the base members 1 and 32 are curved obliquely upward toward the base wall plate 41, they are supported substantially horizontally between the shots 26 and 27.

As shown in FIG. 2, flanges 31a and 32a projecting from upper edges of sieves 31 and 32 having a U-shaped or groove-shaped cross section to both sides from upper edges of side wall plates 42 of box 17, respectively. And is fixed by a plurality of clamps 35. Although the illustration of the left clamp 35 is omitted, the right clamp 35 is supported by a tiltable lever 38. Lever 3
8 is supported by a support plate 37 of the shelf 17a by a support shaft 36, is wound around the support shaft 36, and has one end connected to a lever 38.
In addition, the clamp 35 causes the flanges 31a,
32a is pressed against the shelf 17a.

Preferably, when the lever 38 is rotated to an upright position by a known toggle mechanism or the like, the lever 38
Is configured to maintain an upright position, at which time the sieve 3
The sieves 31 and 32 can be removed from the box 17 by moving and pulling the sieves 31 and 32 to the front end side of the box 17, and the clogging of the sieves 31 and 32 and the cleaning of the inside of the box 17 can be easily performed. To

Next, the operation of the apparatus for drying and sorting resin pellets according to the present invention will be described. The high-temperature particulate matter pneumatically conveyed from the granulator is received by the hopper 23 of the cyclone-type separator 20, and air is discharged from the exhaust port 22 to the hopper 2.
3 to the outside. The granular material is introduced from the introduction port 9a to the base end side of the coarse sieve 31. With the sieve 31 vibrated in the oblique direction by the vibrator 7, the granular material having a predetermined size or more, that is, the lump is discharged from the end of the coarse sieve 31 to the shot 28. Most of the granular material falls from the coarse sieve 31 to the fine sieve 32, and only the granular material having a predetermined size or less, that is, a powdery material, falls from the fine sieve 32 to the bottom plate 25, and is discharged from the box 26 to the box 17 It is discharged to the side of. Granules having a predetermined size are finely sieved by a vibrator 7 in a diagonal direction.
2 and is discharged from the terminal to the side of the box 17 via the shot 27.

When the granules are transferred by the sieves 31 and 32, the granules are cooled and dried by the air sent from the lower side of the sieve 32 to the upper side of the sieve 31 by the blower 10. Since the granular material jumps on the vibrating sieves 31 and 32 and the granular materials come and go from each other, the air flow is smooth, and the granular material is uniformly cooled from the upper layer to the lower layer. Thus, the granular material having a predetermined size is discharged from the end of the lower sieve 32 to the shot 27 as a resin pellet.

Since the right side wall of the shout 26 projects to the lower surface of the fine sieve 32 and the top plate 9 covers the upper side of the shout 26, the powder discharged from the intermediate bottom plate 25 to the shout 26 is cooled and dried. Therefore, it is not necessary to dispose a dust collector above the box 17, and the drying and sorting apparatus for the resin pellets is small, and the floor space of the equipment is small. And installation space is greatly reduced.

[0016]

As described above, according to the present invention, the box is elastically supported on the base by four front, rear, left and right springs, and the coarse and fine sieves are supported in the upper and lower two stages inside the box. An inlet for charging high-temperature granular material as a pellet material is disposed above the base end of the box, and a first shot is provided below the fine sieve and a tip end of the fine sieve. A second shot,
A third shot is disposed at the tip of the coarse sieve, a blower outlet is connected to a space between the bottom plate of the box and the fine sieve, and the box is provided on the lower surface of the bottom plate of the box. Because it supports a vibrator that gives an obliquely upward vibration toward the tip side of the granule, the hot granules from the granulator are cooled and dried in a single facility, It can be sorted out, processing is efficient, equipment costs are reduced and equipment floor space is saved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a schematic configuration of a resin pellet drying and sorting apparatus according to the present invention.

FIG. 2 is a rear cross-sectional view of the apparatus for drying and sorting resin pellets along line 2A-2A in FIG. 1;

[Explanation of symbols]

2: Base 3: Support leg 3a: Spring receiver 4: Support leg 4
a: Spring holder 5: Spring 6: Spring 7: Exciter 8: Bottom plate 9: Top plate 9a: Input port 10: Blower 12: Rotary shaft 13: Impeller 1
4: Outlet 15: Flexible tube 16: Duct 17: Box
17a: shelf board 17b: support plate 20: cyclone type separator 21: inlet 22: exhaust port 23: hopper 24: outlet pipe 25: middle bottom plate 26: shunt 27: shunt 28: shunt 31: sieve 31a: flange 32: Sieve 32
a: Flange 35: Clamp 36: Support shaft 37: Support plate 38: Lever 41: Base wall plate 42: Side wall plate 43: Intermediate wall plate 4
4: Tip wall plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29B 13/10 B29B 13/10

Claims (2)

[Claims] 1. A box is elastically supported by four front, rear, left and right springs on a base, and a coarse sieve and a fine sieve are supported in upper and lower two stages inside the box. An inlet for charging high-temperature granular material as a pellet material is provided on the upper side, a first shot is provided on the lower half of the fine sieve, and a second shot is provided at the tip of the fine sieve. A third shunt is disposed at the tip of the coarse sieve, a blower outlet is connected to the space between the bottom plate of the box and the fine sieve, and the tip of the box is attached to the lower surface of the bottom plate of the box. A resin pellet drying / sorting device, which supports a vibrator for applying an obliquely upward vibration toward a side. 2. The upper and lower coarse sieves and the fine sieves have a U-shaped cross section, and have flanges projecting outward from upper edges of side walls having different heights from each other, and upper end edges of both side walls of the box. The resin pellet drying and sorting apparatus according to claim 1, wherein the apparatus is locked by being superimposed on a shelf plate provided in the apparatus.