JP2007076234A - Treatment method and device of discharged resin material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To release a worker from hard labor by cutting discharged resin materials as a ribbon-like resin through a die hole of a die for diverter, and at the same time, eliminate a risk of a burn in handling in a processing task of the discharged resin materials discharged from a large-sized screw type extruder. <P>SOLUTION: The treatment method and device of the discharged resin materials comprises a method and constitution wherein the resin materials discharged from a diverter bulb (2) connected to a tip of the screw type extruder (1) are pushed out into a plurality of slim ribbon-like resins (55a) by each die hole (4a) of the die for diverter (4), are subjected to a chill setting by cooling water on an inclined gutter slab (51), and are cut short by a cutting device (6). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a processing method and apparatus for discharged resin material, and in particular, it is applied mainly at start-up of a large screw type extruder having a processing capacity of 10 tons / hour or more for melt-kneading and granulating a resin material, The present invention relates to a novel improvement for facilitating the subsequent discharge process by forming a resin resin discharged from a diverter valve into a string-like resin and cutting it finely.

  Conventionally, a synthetic resin material produced by a synthetic reaction has an underwater cutting device, which is a large-capacity granulating device, for the purpose of reforming and homogenizing the material and facilitating subsequent handling in a molding device. It is melt-kneaded and granulated by a screw type extruder having a large size, that is, a processing capacity of 10 tons / hour or more. In such a screw type extruder, a diverter valve is usually provided upstream of the submerged cutting device to be connected, that is, between the screw type extruder and the underwater cutting device. As a processing system for discharged resin material (purge resin) using this diverter valve, for example, the configurations of Patent Documents 1 and 2 are disclosed.

  This diverter valve is a device that switches whether the synthetic resin material melt-kneaded by a screw-type extruder flows into a granulator or is discharged to the outside. In other words, in a large screw extruder, the quality after the grade or type of the resin material is changed during start-up, operation stop, or continuous operation when the properties of the melt-kneaded synthetic resin material are not stable in a steady state. In such a case until the temperature becomes stable, the melt-kneaded synthetic resin material is discharged from the diverter valve to the outside. Since the discharged synthetic resin material is deposited on the floor as it is, an operation for sequentially removing it is performed. The actual processing operations for these discharged resin materials are as shown in FIGS. 3 and 4 below.

  That is, in FIG. 3 and FIG. 4, the processing method and processing apparatus of the conventional waste resin material are shown. In FIG. 3, what is shown by the code | symbol 1 is a screw type extruder, and the front-end | tip part which is the downstream is shown. A diverter valve 2, a manifold 3 having a flow path 3a, and a granulator (not shown) are sequentially connected to the tip of the screw extruder 1 in the downstream direction. This screw type extruder 1 is comprised by the cylinder 11 and the screw 12 inserted in the inner hole 11a so that rotation drive was possible.

The diverter valve 2 includes a valve box 21, a valve body 22 and a driving device 23. The valve box 21 has a flow passage 21a communicating with the inner hole 11a of the screw extruder 1 and penetrating in the horizontal direction and a valve body hole 21b having a circular cross section penetrating perpendicularly to the vertical direction with respect to the flow passage 21a. Is formed. The valve body 22 is a columnar member inserted into the valve body hole 21b, and communicates with the upstream side of the flow path 21a of the valve box 21 at an intermediate portion thereof and passes through an L-shape that opens downward, that is, from the lower end to the outside. 22a is formed. The driving device 23 is provided on the upper portion of the valve box 21 and is connected to the upper end of the valve body 22, and the valve body 22 is reciprocated or reciprocated in the vertical direction, whereby the flow path 21 a of the valve box 21 and the valve body are moved. 22 is configured to be able to switch communication with the 22 discharge holes 22a or a flow path (not shown).
A flow path 3 a is formed in the manifold 3.

  FIG. 4 shows a reciprocating cutting constituted by a cutter 31 reciprocated by, for example, a hydraulic cylinder 30 at the opening of the discharge hole 22a at the lower end surface of the valve box 21 of the diverter valve 2 shown in FIG. A device 8 is provided. Since the structure and configuration of the screw extruder 1, the diverter valve 2 and the manifold 3 are the same as those shown in FIG. 3, the same parts are denoted by the same reference numerals and description thereof is omitted. To do.

  In the diverter valve 2 configured as described above, in the case of the configuration shown in FIG. 3, the discharged resin material is processed as follows. That is, in the diverter valve 2, the discharge hole 22 a of the valve element 22 is in communication with the upstream side of the flow path 21 a of the valve box 21 by operating the driving device 23. Next, the synthetic resin material melted and kneaded by the rotation of the screw 12 in the screw extruder 1 is transported through the inner hole 11a of the cylinder 11 and is extruded from the tip thereof to the flow path 21a of the valve box 21 of the diverter valve 2. Then, it is pushed out to the discharge hole 22a and discharged from the opening at the lower end to the outside. The discharged resin material 55 continuously discharged in a bar shape is cut into an appropriate length by the operator with the cutting spatula 7 in the vicinity of the opening at the lower end of the discharge hole 22a. The discharged resin material 55 cut to an appropriate length and dropped onto the floor is cooled and solidified by water discharge or the like, and is carried outside.

  In the case of the configuration shown in FIG. 4, the rod-shaped discharge resin material 25 discharged to the outside from the opening at the lower end of the discharge hole 22 a is discharged by the cutter 31 operated by the operator operating, for example, a hydraulic operation valve. It is cut into an appropriate length in the vicinity of the opening at the lower end of 22a.

Japanese Patent No. 3181498 JP 2003-340905 A

  Since the conventional processing apparatus and processing method of the discharged resin material are configured as described above, the following problems exist. In other words, since the discharged resin material is discharged from the large-diameter opening of the valve body, the cut discharged resin material is in a large lump shape, and the handling and unloading work has been a heavy labor for the operator. In addition, since this discharged resin material is discharged at a temperature almost equal to that in the melt-kneaded state, that is, about 150 ° C., and has a large heat capacity, even if it is cooled and solidified by water discharge etc., the inside of the lump is not cooled easily. The surface layer was high in temperature for a long time, and there was a risk of burns during handling.

In the method for treating discharged resin material according to the present invention, the discharged resin material discharged from the diverter valve connected to the downstream side of the screw-type extruder has a plurality of thin strings via diverter dies having a plurality of die holes. The string-like resin is extruded as a resin, cooled and solidified by cooling water, and cut by a cutting device, and the string-like resin flows down an inclined saddle plate of a cooling device located below the diverter valve. The cutting device is a method of using a rotary blade that is supplied on water and rotates with respect to a fixed blade.
The apparatus for treating discharged resin material according to the present invention includes a diverter valve connected to a downstream side of a screw type extruder, a diverter die provided at a lower portion of a valve box of the diverter valve, and a diverter die. A cooling device disposed below, an inclined gutter plate provided in the cooling device from which cooling water flows, and a cutting device disposed adjacent to the cooling device, wherein a plurality of diverter dies are provided. The string-like resin extruded from the die hole is configured to be cut by the cutting device after being supplied and cooled on the inclined slab where the cooling water flows down, and the cutting device. Is constituted by a rotary blade rotating with respect to a fixed blade, and the string-like resin is cut into resin after being cut by the cutting device.

  Since the method and apparatus for treating a discharged resin material according to the present invention are configured as described above, the following effects can be obtained. That is, the synthetic resin material is extruded into a plurality of thin string-like resins through a diverter die provided on the lower end surface of the valve box of the diverter valve, and is supplied onto the inclined vertical plate where the cooling water flows and moves. Then, it is cooled and solidified by cooling water, and the thin string-like discharged resin material is easily cooled and solidified to the inside. Further, the cord-like discharged resin material that has been sufficiently cooled and solidified is easily cut by a cutting device constituted by a fixed blade and a rotary blade, and processed into a thin and short piece. As a result, the discharged resin material becomes an aggregate of small fragments at almost room temperature, and handling and carrying out operations become extremely easy, and the risk of burns at that time is eliminated.

  The present invention is a processing of a discharged resin material in which a discharged resin material from a diverter valve is formed into a string-like resin and cut finely at the start-up or the like of a screw type extruder to facilitate subsequent discharge processing. It is an object to provide a method and apparatus.

  Hereinafter, preferred embodiments of a method and apparatus for treating a discharged resin material according to the present invention will be described with reference to the drawings. In FIG. 1, what is shown by the code | symbol 1 is a screw type extruder, and the front-end | tip part which is the downstream is shown. A diverter valve 2, a manifold 3 having a flow path 3a, and a granulator (not shown) are sequentially connected to the tip of the screw extruder 1 in the downstream direction. The screw extruder 1 includes a cylinder 11, The screw 12 is rotatably inserted into the inner hole 11a.

  The diverter valve 2 is mainly composed of a valve box 21, a valve body 22, and a drive device 23. The valve box 21 communicates with the inner hole 11a of the screw extruder 1 and passes through a horizontal passage 21a. And the valve body hole 21b of the circular cross section penetrated orthogonally to the up-down direction with respect to this flow path 21a is formed. The valve body 22 is a cylindrical member inserted into the valve body hole 21b, and communicates with the upstream side of the flow path 21a of the valve box 21 at an intermediate portion thereof and passes through an L-shape that opens downward, that is, from the lower end to the outside. 22a is formed. The driving device 23 is provided at the upper part of the valve box 21 and is connected to the upper end of the valve body 22, and the valve body 22 is reciprocated up and down or reciprocated to reciprocate so that the flow path 21a of the valve box 21 and the valve The body 22 is configured to communicate with the discharge hole 22a of the body 22 or a flow path (not shown).

  The diverter valve 2 is provided with a diverter die 4 having a plurality of die holes 4 a at the opening of the valve body hole 21 b on the lower end surface of the valve box 21, and a plate of the cooling device 4 is provided below the diverter die 4. An inclined ridge plate 51 having a shape is disposed, and a rotary cutting device 6 (or a non-rotary type) is disposed adjacent to the lower end of the inclined ridge plate 51. A horizontally-long sprinkler 60 is provided on the top of the inclined slat 51, and the cooling water 61 flowing down from the sprinkler 60 flows down the inclined slat 51, and the diverter die 4 is placed on the cooling water 61. A thin string-like resin 55a of the discharged resin material 55 extruded from the hole 4a is supplied and cooled.

  The diverter die 4 is configured by providing a plurality of linearly arranged die holes 4a in one row or in parallel, and the row of die holes is formed in the flow path 21a of the valve box 21 of the diverter valve 2. It arrange | positions so that a die hole may face downward so that it may become parallel to a direction. The die hole 4a is preferably configured to have a small diameter of 8 mm or less at the tip thereof.

  The cutting device 6 is provided in a rectangular plate-shaped fixed blade 62A having a rectangular cross section, a rotating blade 62 that rotates close to the entire width of the front end edge of the fixed blade 62A, and the fixed blade 62A and the rotating blade 62 below. The tray 63 is configured to support them and receive a cut product, a cover 64 that covers the rotary blade 62, and a plurality of moving wheels 65 provided at the bottom of the tray 63.

  The case where the processing apparatus of the discharged | emitted resin material comprised as mentioned above is operated is demonstrated. The discharged resin material 55 discharged from the diverter valve 2 is processed as follows. That is, in the diverter valve 2, the discharge hole 22 a of the valve element 22 is in communication with the upstream side of the flow path 21 a of the valve box 21 by operating the driving device 23. Next, the synthetic resin material melted and kneaded by the rotation of the screw 12 in the screw type extruder 1 is transported through the inner hole 11a of the cylinder 11 and is extruded from the tip to the flow path 21a of the valve box 21 of the diverter valve 2. Then, it is extruded from the upstream side of the flow path 21a to the discharge hole 22a of the valve body 22 and discharged to the outside below through the diverter die 4. The discharged resin material 55 is extruded downward from the die hole 4a of the diverter die 4 into a plurality of string-like resins 55a, and hangs down on the inclined flange plate 51.

  In the inclined vertical plate 51, cooling water 61 is supplied from a sprinkler 60 connected to a water supply facility and flows down over the entire width. The discharged resin material 55 continuously extruded and suspended from the diverter die 4 flows down to the cutting device 6 side while being cooled and solidified by the cooling water 61.

  The discharged resin material 55 that continuously flows down together with the cooling water 61 moves to the cutting device 6, and in the cutting device 6, the rotary blade 62 rotates in the counterclockwise direction of the arrow shown in FIG. 2. Accordingly, the string-like resin 55a is finely cut and stored on the tray 63 as the cut resin 55b.

  The post-cutting resin 55b moves in the tray 63 together with the cooling water 61 in the leading end direction (not shown), that is, in the right direction in FIG. The accumulated post-cutting resin 55b is sufficiently cooled to a temperature at which the operator does not burn, and can be treated with any appropriate amount.

  The present invention can be applied not only to discharged resin materials but also to cutting foods and the like.

It is front sectional drawing which shows the structure of the processing apparatus of the discharge resin material by this invention. It is AA sectional drawing in FIG. It is front sectional drawing which shows the structure and processing method of the processing apparatus of the conventional waste resin material. It is front sectional drawing which shows the structure and processing method of the processing apparatus of the other conventional discharge resin material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw type extruder 2 Diverter valve 3 Manifold 3a Channel 4 Diverter die 6 Cutting device 11 Cylinder 11a Inner hole 12 Screw 21 Valve box 21a Channel 21b Valve body hole 22 Valve body 22a Discharge hole 23 Drive device 51 Inclined plate 51 62A fixed blade 62 rotary blade 63 tray 64 cover 65 moving wheel 55 discharged resin material 55a string-like resin 55b resin after cutting

Claims (4)

  A plurality of discharged resin materials (55) discharged from the diverter valve (2) connected to the downstream side of the screw extruder (1) are passed through a diverter die (4) having a plurality of die holes (4a). A method for treating a discharged resin material, wherein the resin is extruded as a thin string-like resin (55a), cooled and solidified by cooling water (61), and cut by a cutting device (6).   The string-like resin (55a) is supplied onto the cooling water (61) flowing down the inclined flange plate (51) of the cooling device (40) located below the diverter valve (2), and the cutting device ( 6. The method for treating a discharged resin material according to claim 1, wherein a rotating blade (62) rotating with respect to the fixed blade (62A) is used for 6).   A diverter valve (2) connected to the downstream side of the screw extruder (1), a diverter die (4) provided at a lower portion of a valve box (21) of the diverter valve (2), and the diverter A cooling device (40) disposed below the die (4), an inclined gutter plate (51) provided in the cooling device (40) from which cooling water (61) flows down, and the cooling device (40). A stringer resin (55a) extruded from a plurality of die holes (4a) of the diverter die (4), the cutting water (61) disposed adjacently, the cooling water (61) An apparatus for treating discharged resin material, wherein the apparatus is configured to be cut by the cutting device (6) after being supplied and cooled onto the inclined sloping plate (51) flowing down.   The cutting device (6) is composed of a rotary blade (62) that rotates relative to a fixed blade (62A), and the string-like resin (55a) is cut into a resin (55b) after being cut by the cutting device (6). The processing apparatus of the discharged | emitted resin material of Claim 3 characterized by the above-mentioned.

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