JP5560586B2 - Setting method of sorting condition of resin piece in sorter - Google Patents

Description

The present invention relates to a method of sorting a resin piece of a specific material from a raw material formed by mixing resin pieces of a plurality of materials by a sorter, and in particular, the resin piece is compressed by compressed air injected from a nozzle device. The present invention relates to a method suitable for setting a resin piece of a material to be blown away in a blower sorter .

Conventionally, a sorter that sorts grains, resin pellets, coffee beans, and other granular materials is known (see Patent Document 1).
The sorter described in Patent Document 1 excludes defective products from granular materials that are raw materials, detects defective products contained in the moving raw materials by an optical detection unit, and based on the detection, an injection nozzle A defective product is blown off by the apparatus.
The granular materials separated and sorted into non-defective products and defective products are accommodated in a container or the like installed in the sorting machine, or directly conveyed to a subsequent process by a conveying means such as a conveyor.

Recently, recycling of resin products and the like has been promoted.
Therefore, it is conceivable to improve recycling efficiency by separating and sorting a resin piece of a specific material from a raw material in which resin pieces of a plurality of materials are mixed using the above sorter.

  In that case, by setting the material of the resin piece for the sorter, the sorter can blow off the resin piece of the material with compressed air and sort the resin piece of a specific material from the raw material.

Here, the sorter jets compressed air from the nozzle device, and from the viewpoint of durability of the device, it is desirable that fewer resin pieces be blown off.
Therefore, the operator may determine in advance the mixing ratio for each material of the resin piece in the raw material and determine the material of the resin piece to be blown away by compressed air. However, in the case of resin, the appearance may not be distinguished. In many cases, it is not easy to determine the mixing ratio.

JP-A-10-216650

  The present invention can flexibly set a resin piece to be extracted from a raw material when a resin piece of a specific material is selected from a raw material in which a plurality of resin pieces are mixed by a sorter. It aims at providing the sorting condition setting method of the resin piece in a sorter.

In order to achieve the above object, the present invention is a sorter capable of discriminating the material of a resin piece, for example, based on detection of reflected light or transmitted light of light irradiated on the resin piece, and based on the discrimination result. extracts resin pieces of a preset material from the raw material, in a selection condition setting method of the resin pieces in a sorter resin pieces of a plurality of materials is screened resin pieces of a particular material from the raw material obtained by mixing,
Prior to sorting, a part of the raw material is put into the sorting machine, and the material discrimination function of the sorting machine is used to analyze the material of the resin pieces mixed in the raw material and the mixing ratio thereof,
A step of comparing the mixing ratio of a resin piece of a specific material and a resin piece of another material based on the analysis result;
A step of, based on the comparison result, to set one of the specific material of the resin pieces and the other material of the resin pieces as resin pieces of the subject to be extracted from the raw material,
It is characterized by providing.

In the present invention, it is preferable that a resin piece of a preset material is extracted by being blown away by compressed air.
In the present invention, it is preferable that the setting step sets a resin piece of a material having a lower mixing ratio as an extraction target.

In the present invention, it is preferable that the setting step automatically sets the resin piece to be extracted.
Further, in the present invention, it is preferable that the analysis step circulates the raw material to be input to the sorter until the fluctuation in the mixing ratio value of the resin pieces converges within a predetermined range.

The present invention analyzes a material of a resin piece mixed in a raw material and its mixing ratio by using a material discrimination function originally provided in a sorter, and a resin piece to be extracted from the raw material based on the analysis result Can be set flexibly.
The present invention also der those preset resin piece is extracted blown off by compressed air lever, so that the amount of blown off by the compressed air is reduced, it is possible to set the resin pieces of the target blow away. That is, among the resin pieces mixed in the raw material, if the mixing ratio of the resin pieces of a specific material that the operator wants to select and the resin pieces of other materials is 5:95, the target to blow off the resin pieces of a specific material If the mixing ratio of the resin piece of the specific material that the operator wants to select and the resin piece of the other material is 95: 5, the resin piece other than the resin piece of the specific material is blown away. It is set as a resin piece. Accordingly, the present invention is not particularly limited as long as blow resin pieces by compressed air separator is injected from the nozzle device, it is possible to reduce the load on the nozzle device, which hardly occurs durability problems of the apparatus It is.

  According to the present invention, if the resin piece to be extracted is automatically set, the burden on the operator can be reduced.

  In the present invention, if the raw material is circulated until the fluctuation of the mixing ratio of the resin pieces converges to a predetermined range, the analysis accuracy of the mixing ratio can be improved and the selection conditions can be set more accurately. it can.

The schematic explanatory drawing of the sorter used for this invention. Explanatory drawing of the operation screen of the sorter used for this invention. Explanatory drawing of the operation screen of the sorter used for this invention.

  Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic explanatory diagram of a sorter used in the present invention.
The sorting machine used in the present invention includes a raw material supply hopper 1, a conveyor 2 that conveys resin pieces supplied from the raw material supply hopper 1, a detection device 3 that detects resin pieces conveyed by the conveyor 2, and a detection device. 3, a control device 4 that determines the material of the resin piece detected by 3, a nozzle device 5 that blows off the resin piece with compressed air based on an instruction from the control device 4, and a container 6 that contains the selected resin piece. It is to be prepared.

As the detection device 3, for example, a known device described in Japanese Patent Application Laid-Open No. 2001-108616 (US Pat. No. 6,624,417) can be used.
In the present embodiment, the detection device 3 receives reflected light or transmitted light of light emitted from the light sources 3a and 3a onto the resin piece by the sensor 3b.
The sorter shown in FIG. 1 has a background 3c disposed behind the resin piece with respect to the light sources 3a, 3a and the sensor 3b in order to detect transmitted light and / or transmitted / reflected light of the resin piece. It has become.

The control device 4 compares the detection value obtained by the detection device 3 with a reference value corresponding to each material stored in advance to determine the material of the resin piece, and based on the determination result, the compressed air The nozzle device 5 is instructed at the timing of injecting.
Further, the control device 4 has an operation screen 7, which allows the sorting machine to analyze the material of the resin piece mixed into the raw material and the mixing ratio by the button operation, or the resin piece of the material desired to be selected from the raw material. Can be selected.

  In response to an instruction from the control device 4, the nozzle device 5 blows off a resin piece made of a material preset in the control device 4 with compressed air.

  Two containers 6 are prepared, and a resin piece that is not blown off by compressed air is stored in the first storage container 6a, and a resin piece that is blown off by compressed air is stored in the second storage container 6b.

Here, the resin piece used as a raw material in the present invention is, for example, polyethylene terephthalate (PET), polyethylene (PE), vinyl chloride (PVC), polypropylene (PP), polystyrene (PS), vinylidene chloride (PVDC), ABS resin. Etc. It goes without saying that all materials other than those exemplified can be used as raw materials.
It is preferable that the raw material is subjected to specific gravity sorting, sieve sorting or the like as a pretreatment, and the composition is simplified. Moreover, it is preferable that a raw material is wash | cleaned, crushed, compressed, etc. as a pre-processing, and a stain | pollution | contamination is removed or the shape was equalized.
By performing such preprocessing, it is expected that the analysis accuracy and the sorting accuracy will be remarkably improved.

  The resin pieces that are the raw materials are discriminated as described above by previously storing the detection values of the respective materials obtained by the detection device 3 as reference values in the control device 4.

  An embodiment of the present invention is a method for selecting a resin piece of a specific material from a raw material in which resin pieces of a plurality of materials are mixed using the above sorter. The material is introduced into the sorter and the material discrimination function of the sorter is used to analyze the material of the resin pieces mixed in the raw material and the mixing ratio, and mixed in the raw material based on the analysis result. The mixing ratio between a resin piece of a specific material and a resin piece of another material is compared, and the lower mixing ratio is set as a resin piece to be blown away by compressed air based on the comparison result.

  According to the embodiment of the present invention, the material discriminating function originally provided in the sorting machine is used to analyze the material of the resin pieces mixed in the raw material and the mixing ratio thereof. However, the resin piece to be blown off can be set so that the amount blown off by the compressed air is surely reduced. Therefore, the load on the nozzle device is small, which is preferable from the viewpoint of durability of the device.

  In the embodiment of the present invention, it is preferable that the resin pieces to be blown away by compressed air are automatically set. If the resin piece to be blown off is automatically set, the burden on the operator can be reduced.

  In the embodiment of the present invention, the analysis of the mixing ratio is performed using the raw material stored in the raw material supply hopper 1, and the deviation of the resin piece in the raw material supply hopper 1 is taken into account. It can be continuously performed until the fluctuation of the mixing ratio value converges to a predetermined range.

Further, since the nozzle device does not operate at the time of this analysis, all the raw materials used for the analysis are stored in the first storage container 6a. However, if the raw materials are circulated between the raw material supply hopper 1 In addition, it is possible to save labor for the operator to take out the raw material used for analysis from the first container 6a, and to improve work efficiency.
And since the circulating raw material stirs the raw material in the raw material supply hopper 1 and equalizes the unevenness of the material of the resin piece, it can be expected to improve the analysis accuracy of the mixing ratio of the resin piece.
In order to equalize the raw material, the raw material supply hopper 1 may be provided with a stirring member such as a blade.

As the detection device 3 of the sorter used in the present invention, any known device can be used as long as the material of the resin piece can be discriminated.
Moreover, although the sorter used for this invention blows off the resin piece with the compressed air injected from the nozzle apparatus 5, it is good also as what extracts a resin piece by another well-known means.

  In the above embodiment, the sorting machine used in the present invention transports the resin piece supplied from the raw material supply hopper 1 to the detection means 3 by the conveyor 2. It may be transported by a kite.

Although the sorter used in the present invention includes the container 6 that accommodates the sorted resin pieces in the above-described embodiment, a transfer device such as a conveyor can be attached instead of the container 6. If a transport device is attached, the sorted resin pieces can be directly transported to the subsequent process, which is efficient.
Hereinafter, in the present invention, a method for setting a resin piece to be blown away by compressed air will be described based on examples.

2 and 3 are explanatory diagrams of the operation screen 7 of the sorter shown in FIG.
The operation screen 7 is attached to the control device 4 and includes an analysis button 8 and a substance selection button 9, and the mixing ratio of resin pieces in the raw material is displayed on the display unit 10 adjacent to the substance selection button 9. It is like that.

  First, when the operator presses the analysis button 8, the sorting machine analyzes the material of the resin pieces mixed in the raw material and the mixing ratio before the sorting. As shown in FIG. The mixing ratio is displayed.

  In the state of FIG. 3, when the operator selects “PE” of the material selection button 9 as a resin piece to be selected, for example, the control device 6 automatically obtains the sum of the mixing ratios of resin pieces other than “PE”. Then, the mixing ratio of “PE” and other resin pieces is compared, and the smaller mixing ratio, in this example, the resin pieces other than “PE”, ie, “PET”, “PVC”,. It is automatically set as the target to be blown away by air.

  In addition, in the state of FIG. 3, when the operator selects “PVC” of the substance selection button 9 as the resin piece to be selected, the control device 6 automatically calculates the sum of the mixing ratios of resin pieces other than “PVC”. Then, the mixing ratio between “PVC” and the other resin pieces is compared, and the smaller mixing ratio, that is, the resin piece of “PVC” is automatically set as an object to be blown away by compressed air.

  Even if the mixing ratio between the resin piece selected by the operator and the other resin pieces is the same, for example, if the specified resin piece is blown away with compressed air, it is no problem if it is set in advance. Will not occur.

  Then, following the setting of the resin piece to be blown away, the sorter starts normal operation, and the set resin piece is blown away by compressed air. In the former case, the raw material is “PE” and other materials. In the latter case, the raw material is sorted into “PVC” and other resin pieces.

  In this embodiment, the operation screen 7 is provided with the substance selection button 9 in which the substance name is specified in advance, but the substance name may be displayed together with the mixing ratio. In this case, the resin piece to be selected can be selected by touching and touching the substance name displayed on the operation screen.

  The operation screen 7 may display a piece of resin set as a target to be blown away. As a result, it is possible to know which material of the resin piece has been blown off, and the operator's work after sorting becomes easy.

  According to the present embodiment, only by designating the resin piece to be sorted by the operator, the sorter automatically sets the resin piece to be blown off by the compressed air, so that the operator is not burdened.

  Further, in this embodiment, since the amount of the resin piece blown off by the compressed air is small, the second containing container 6b for containing the resin piece to be blown off can be made small, and the apparatus can be miniaturized.

In Example 1, although the case where an operator selected only one type of resin piece as a selection target was described, by selecting two or more types, the selected two or more types of resin pieces and the other resin pieces are selected. It can also be separated and sorted.
Also in this case, as in Example 1, the mixing ratio of two or more selected resin pieces and the other resin pieces are compared, and the sorter is the target to blow the smaller mixing ratio with compressed air. There is no change in the automatic setting.

In the first and second embodiments, the case where the operator selects a resin piece to be sorted and automatically sets the resin piece to be blown by the sorter based on this is described. However, all of these are performed manually. You can also
In that case, the operator can confirm the analysis result displayed on the operation screen 7 and can set the target to be blown away by compressed air. And an operator should just set the one where a mixing ratio is smaller as the object which blows away with compressed air.

Such a sorter has a small amount to be blown off even when the position of a container or the like for storing a specific resin piece is determined, or when a resin piece to be blown off by compressed air is determined in relation to a subsequent process. Regardless, since the resin piece to be blown off can be set freely according to the situation, it is highly useful.
Therefore, it is preferable that the sorter used in the present invention can be switched between a case where the resin piece to be blown away by the compressed air is automatically set and a case where the resin piece is manually set.

The resin piece sorting condition setting method in the sorting machine of the present invention is to analyze the material of the resin piece mixed in the raw material and the mixing ratio using the material discrimination function provided in the sorting machine, and based on the analysis result. Thus, the resin piece to be extracted from the raw material can be set flexibly. The present invention also der lever which preset resin piece is extracted blown off by compressed air, so that the amount of blown off by the compressed air is reduced, it is possible to set the resin pieces of the object to blow off Therefore, it does not cause a problem of durability of the apparatus and is very practical.

DESCRIPTION OF SYMBOLS 1 ... Raw material supply hopper 2 ... Conveyor 3 ... Detection means 3a ... Light source 3b ... Sensor 3c ... Background 4 ... Control apparatus 5 ... Nozzle apparatus 6 ... Storage container 6a ... 1st storage container 6b ... 2nd storage container 7 ... Operation screen 8 ... Analysis button 9 ... Substance selection button 10 ... Display part

Claims (5)

A the material of the resin pieces distinguishable sorters, based on the determination result, extracts the resin pieces of a preset material from the raw material, identified from the raw material resin pieces of a plurality of materials is mixed In the sorting condition setting method for resin pieces in a sorter that sorts resin pieces of the material
Prior to sorting, a part of the raw material is put into the sorting machine, and the material discriminating function of the sorting machine is used to analyze the material of the resin pieces mixed in the raw material and the mixing ratio thereof,
A step of comparing the mixing ratio of a resin piece of a specific material and a resin piece of another material based on the analysis result;
A step of, based on the comparison result, to set one of the specific material of the resin pieces and the other material of the resin pieces as resin pieces of the subject to be extracted from the raw material,
A sorting condition setting method for resin pieces in a sorter.   2. A resin piece sorting condition setting method in a sorting machine according to claim 1, wherein the resin piece made of a preset material is extracted by being blown away by compressed air.   3. The resin piece sorting condition setting method according to claim 1, wherein the setting step sets a resin piece having a lower mixing ratio as a material to be extracted.   4. The resin piece sorting condition setting method according to claim 1, wherein the setting step automatically sets a resin piece to be extracted.   The said analysis process circulates the raw material thrown into a sorter until the fluctuation | variation of the value of the mixing ratio of the said resin piece converges to the predetermined range, The circulation method of Claim 1 characterized by the above-mentioned. A method for setting sorting conditions for resin pieces in a sorter.