JP2021037635A - Foamed particle manufacturing equipment and manufacturing method thereof - Google Patents

Foamed particle manufacturing equipment and manufacturing method thereof Download PDF

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JP2021037635A
JP2021037635A JP2019158794A JP2019158794A JP2021037635A JP 2021037635 A JP2021037635 A JP 2021037635A JP 2019158794 A JP2019158794 A JP 2019158794A JP 2019158794 A JP2019158794 A JP 2019158794A JP 2021037635 A JP2021037635 A JP 2021037635A
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steam
temperature
foam tank
control unit
pressure
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JP7372083B2 (en
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昌英 戎井
Masahide Ebii
昌英 戎井
経宣 福田
Tsunenori Fukuda
経宣 福田
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Kaneka Corp
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Kaneka Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Molding Of Porous Articles (AREA)
  • Flow Control (AREA)
  • Control Of Temperature (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

To provide precisely control a temperature inside a foaming vessel.SOLUTION: In a foamed particle manufacturing apparatus of the present invention, a temperature control unit (10) is provided with a pressure reducing valve (12) for keeping a pressure of steam supplied to a jacket part (2) constant, branch pipes (11a to 11c) that branch from a downstream side of the pressure reducing valve (12), and a steam supply amount is different from each other, an on-off valve switching control unit (21) for controlling opening/closing switching of the branch pipes (11a to 11c), and control valves (14b, 14c) for regulating an amount of steam in the branch pipes (11b, 11c).SELECTED DRAWING: Figure 1

Description

本発明は、発泡粒子の製造装置および製造方法に関する。 The present invention relates to an apparatus and a method for producing foamed particles.

熱可塑性樹脂からなる発泡粒子は、発泡槽内で分散剤を含む水中に熱可塑性樹脂粒子を分散させ、ついで揮発性発泡剤を添加し、高温高圧下に保って揮発性発泡剤を含浸させたのち、低圧雰囲気下に放出する方法（以下、除圧発泡法）により製造されることは知られている。 The foamed particles made of the thermoplastic resin were impregnated with the volatile foaming agent by dispersing the thermoplastic resin particles in water containing a dispersant in a foaming tank, then adding a volatile foaming agent, and keeping the temperature under high temperature and high pressure. After that, it is known that the particles are produced by a method of discharging the particles under a low pressure atmosphere (hereinafter referred to as a decompression foaming method).

このような発泡粒子の製造方法である除圧発泡法では、各生産バッチでの発泡粒子の発泡倍率のバラツキを小さくするために、生産バッチ間での発泡槽内温バラツキを小さくすること、およびバッチ内での発泡槽の温度制御の精度が高いこと（±０．１℃レベル）が必要である。このため、発泡槽内の温度は、昇温から発泡終了までの間で精密に調節されている。図５は、発泡槽１内の温度を調節する従来の温調制御部の概略構成を模式的に示した図である。 In the decompression foaming method, which is a method for producing such foamed particles, in order to reduce the variation in the foaming ratio of the foamed particles in each production batch, the temperature variation in the foaming tank between the production batches is reduced, and the variation in the temperature inside the foaming tank is reduced. It is necessary that the temperature control of the foam tank in the batch is highly accurate (± 0.1 ° C level). Therefore, the temperature in the foam tank is precisely adjusted from the temperature rise to the end of foaming. FIG. 5 is a diagram schematically showing a schematic configuration of a conventional temperature control control unit that adjusts the temperature in the foam tank 1.

図５に示されるように、従来の発泡粒子の製造装置は、発泡槽１と温調制御部１００と、を備えている。発泡槽１には、その外周部を取り囲むように、ジャケット部２が設けられている。従来の温調制御部１００は、ジャケット部２に対して蒸気を供給する蒸気供給管路１１１を備えている。そして、蒸気供給管路１１１には、蒸気供給源から蒸気が供給される上流側から下流側（ジャケット部２側）へ向けて、減圧弁１１２、開閉弁１１３、および制御弁１１４がこの順に設けられている。減圧弁１１２は、蒸気供給源から流れる高圧の蒸気を減圧して、ジャケット部２へ供給する蒸気圧を一定に保つ。また、制御弁１１４は、上流側から流れる蒸気を所定の流量に調節し下流側へ送る。制御弁１１４は、温度指示調節器（ＴＩＣ）に接続されている。当該温度指示調節器は、発泡槽１内の温度の信号を受け、当該信号に基づいてＰＩＤ制御などのプロセス制御方式を用いて制御弁１１４の弁開度を調節する。これによって、蒸気供給管路１１１を流れる蒸気の流量が調節される。このように、従来の構成では、発泡槽１の昇温から発泡終了までの間、一定口径（呼び径）の蒸気供給管路１１１を用いて、ジャケット部２へ一定圧力の蒸気を供給するようになっている。そして、この一定圧力の蒸気の供給量を制御弁１１４により調節することによって、発泡槽１内の温度が調節される。 As shown in FIG. 5, the conventional foamed particle manufacturing apparatus includes a foaming tank 1 and a temperature control unit 100. The foam tank 1 is provided with a jacket portion 2 so as to surround the outer peripheral portion thereof. The conventional temperature control unit 100 includes a steam supply line 111 that supplies steam to the jacket unit 2. The steam supply pipeline 111 is provided with a pressure reducing valve 112, an on-off valve 113, and a control valve 114 in this order from the upstream side to the downstream side (jacket portion 2 side) where steam is supplied from the steam supply source. Has been done. The pressure reducing valve 112 decompresses the high-pressure steam flowing from the steam supply source and keeps the vapor pressure supplied to the jacket portion 2 constant. Further, the control valve 114 adjusts the steam flowing from the upstream side to a predetermined flow rate and sends it to the downstream side. The control valve 114 is connected to a temperature indicator (TIC). The temperature indicator controller receives a signal of the temperature in the foam tank 1 and adjusts the valve opening degree of the control valve 114 based on the signal by using a process control method such as PID control. As a result, the flow rate of steam flowing through the steam supply line 111 is adjusted. As described above, in the conventional configuration, the steam supply line 111 having a constant diameter (nominal diameter) is used to supply steam at a constant pressure to the jacket portion 2 from the temperature rise of the foam tank 1 to the end of foaming. It has become. Then, the temperature in the foam tank 1 is adjusted by adjusting the supply amount of the steam of this constant pressure by the control valve 114.

各生産バッチで発泡倍率バラツキが小さい発泡粒子を製造する上で、発泡槽内の温度を精密に制御することは重要である。発泡槽１の内部は最大１６０℃へ加熱する必要があるため、ジャケット部２へ蒸気を供給して加熱する。そのため、（ａ）加熱のみ（冷却しない）の温度制御となること、（ｂ）発泡槽１の熱容量が大きいことから、温調制御部１００による発泡槽１の内温測定値の応答遅れ時間が長く、精度良く内温を制御することは難しい。図５に示された従来の装置では、発泡槽１内の温度を精密に制御する点において、改善の余地がある。 Precise control of the temperature inside the foam tank is important for producing foam particles with a small variation in foam ratio in each production batch. Since it is necessary to heat the inside of the foam tank 1 to a maximum of 160 ° C., steam is supplied to the jacket portion 2 to heat the inside. Therefore, (a) the temperature is controlled only by heating (not cooling), and (b) the heat capacity of the foam tank 1 is large, so that the response delay time of the internal temperature measurement value of the foam tank 1 by the temperature control unit 100 is large. It is difficult to control the internal temperature accurately for a long time. In the conventional apparatus shown in FIG. 5, there is room for improvement in that the temperature in the foam tank 1 is precisely controlled.

本発明の一態様は、発泡槽内の温度を精密に制御することが可能な発泡粒子の製造装置および製造方法を実現することを目的とする。 One aspect of the present invention is to realize an apparatus and a method for producing foamed particles capable of precisely controlling the temperature in the foaming tank.

上記の課題を解決するために、本発明の一態様に係る発泡粒子の製造装置は、発泡槽と、前記発泡槽の外周部に設けられたジャケット部と、前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、前記温調制御部は、前記ジャケット部へ供給される蒸気の圧力を一定に保つ第１の減圧弁と、前記第１の減圧弁の下流側から分岐し、蒸気供給量が互いに異なる複数の分岐管と、前記複数の分岐管の開閉切替を制御するための切替制御部と、前記複数の分岐管の少なくとも１つに設けられ、当該分岐管での蒸気量を調節する第１の制御弁と、を備えたことを特徴としている。 In order to solve the above problems, the foam particle manufacturing apparatus according to one aspect of the present invention supplies steam to the foam tank, the jacket portion provided on the outer peripheral portion of the foam tank, and the jacket portion. A temperature control control unit having a pipe and adjusting the temperature in the foam tank is provided, and the temperature control unit includes a first pressure reducing valve that keeps the pressure of steam supplied to the jacket part constant. , A plurality of branch pipes branching from the downstream side of the first pressure reducing valve and having different steam supply amounts, a switching control unit for controlling opening / closing switching of the plurality of branch pipes, and the plurality of branch pipes. It is characterized in that it is provided at least one and is provided with a first control valve for adjusting the amount of steam in the branch pipe.

また、上記の課題を解決するために、本発明の一態様に係る発泡粒子の製造装置は、発泡槽と、前記発泡槽の外周部に設けられたジャケット部と、前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、前記温調制御部は、前記供給管に設けられ、上流側の蒸気供給源から送られる蒸気の圧力を減圧して、下流側へ送る第２の減圧弁と、前記供給管における前記第２の減圧弁の下流側に設けられ、前記ジャケット部への蒸気流量を調節する第２の制御弁と、前記第２の減圧弁を制御し、前記供給管を流れる蒸気の圧力を上昇または降下させる減圧弁圧力制御部と、を備えたことを特徴としている。 Further, in order to solve the above problems, the foam particle manufacturing apparatus according to one aspect of the present invention supplies steam to the foam tank, the jacket portion provided on the outer peripheral portion of the foam tank, and the jacket portion. A temperature control unit for adjusting the temperature in the foam tank is provided, and the temperature control unit is provided in the supply pipe to supply steam from an upstream steam supply source. A second pressure reducing valve that reduces the pressure and sends it to the downstream side, and a second control valve that is provided on the downstream side of the second pressure reducing valve in the supply pipe and regulates the steam flow rate to the jacket portion. The second pressure reducing valve is controlled, and the pressure reducing valve pressure control unit for increasing or decreasing the pressure of steam flowing through the supply pipe is provided.

また、上記の課題を解決するために、本発明の一態様に係る発泡粒子の製造方法は、発泡槽と、前記発泡槽の周囲に設けられたジャケット部と、前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、前記温調制御部は、前記ジャケット部へ供給される蒸気の圧力を一定に保つ第１の減圧弁と、前記第１の減圧弁の下流側から分岐し、蒸気供給量が互いに異なる複数の分岐管と、前記複数の分岐管の少なくとも１つに設けられた第１の制御弁と、を備えた製造装置を用いた発泡粒子の製造方法において、前記複数の分岐管の開閉切替を制御するとともに、当該分岐管での蒸気量を前記第１の制御弁により調節することを特徴としている。 Further, in order to solve the above-mentioned problems, the method for producing foamed particles according to one aspect of the present invention supplies steam to a foaming tank, a jacket portion provided around the foaming tank, and the jacket portion. A first pressure reducing valve having a supply pipe and including a temperature control unit for adjusting the temperature in the foam tank, the temperature control unit keeps the pressure of steam supplied to the jacket unit constant. A plurality of branch pipes branching from the downstream side of the first pressure reducing valve and having different steam supply amounts, and a first control valve provided in at least one of the plurality of branch pipes. A method for producing foamed particles using a production apparatus is characterized in that the opening / closing switching of the plurality of branch pipes is controlled and the amount of vapor in the branch pipes is adjusted by the first control valve.

また、上記の課題を解決するために、本発明の一態様に係る発泡粒子の製造方法は、発泡槽と、前記発泡槽の周囲に設けられたジャケット部と、前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、前記温調制御部は、前記供給管に設けられ、上流側の蒸気供給源から送られる蒸気の圧力を減圧して、下流側へ送る第２の減圧弁と、前記供給管における前記第２の減圧弁の下流側に設けられた第２の制御弁と、を備えた製造装置を用いた発泡粒子の製造方法において、前記第２の減圧弁を制御し、前記供給管を流れる蒸気の圧力を上昇または降下させるとともに、前記ジャケット部への蒸気流量を前記第２の制御弁により調節することを特徴としている。 Further, in order to solve the above-mentioned problems, the method for producing foamed particles according to one aspect of the present invention supplies steam to a foaming tank, a jacket portion provided around the foaming tank, and the jacket portion. It has a supply pipe and includes a temperature control unit for adjusting the temperature in the foam tank, and the temperature control unit is provided in the supply pipe and is provided with a pressure of steam sent from a steam supply source on the upstream side. Foamed particles using a manufacturing apparatus provided with a second pressure reducing valve for reducing the pressure and sending the steam to the downstream side and a second control valve provided on the downstream side of the second pressure reducing valve in the supply pipe. The second pressure reducing valve is controlled to increase or decrease the pressure of steam flowing through the supply pipe, and the steam flow rate to the jacket portion is adjusted by the second control valve. It is supposed to be.

本発明の一態様によれば、発泡槽内の温度を精密に制御することができる。 According to one aspect of the present invention, the temperature inside the foam tank can be precisely controlled.

本発明の実施形態１に係る発泡粒子の製造装置の概略構成を模式的に示した図である。It is a figure which showed schematic structure of the manufacturing apparatus of the foamed particle which concerns on Embodiment 1 of this invention. 発泡工程中の発泡槽の内温設定の一例、および当該内温設定に対応した実施形態１に係る製造装置における複数の分岐管の切替制御を示すグラフである。It is a graph which shows an example of the internal temperature setting of a foaming tank in a foaming process, and the switching control of a plurality of branch pipes in the manufacturing apparatus which concerns on Embodiment 1 corresponding to the internal temperature setting. 本発明の実施形態２に係る発泡粒子の製造装置の概略構成を模式的に示した図である。It is a figure which showed schematic structure of the manufacturing apparatus of the foamed particle which concerns on Embodiment 2 of this invention. 発泡工程中の発泡槽の内温設定の一例、および当該内温設定に対応した実施形態２に係る製造装置における複数の分岐管の切替制御を示すグラフである。It is a graph which shows an example of the internal temperature setting of a foaming tank in a foaming process, and the switching control of a plurality of branch pipes in the manufacturing apparatus which concerns on Embodiment 2 corresponding to the internal temperature setting. 従来の発泡粒子の製造装置の概略構成を模式的に示した図である。It is a figure which showed typically the schematic structure of the conventional foaming particle manufacturing apparatus.

〔実施形態１〕
以下、本発明の一実施形態について、詳細に説明する。図１は、本実施形態に係る発泡粒子の製造装置の概略構成を模式的に示した図である。 [Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail. FIG. 1 is a diagram schematically showing a schematic configuration of a foamed particle manufacturing apparatus according to the present embodiment.

図１に示されるように、本実施形態に係る発泡粒子の製造装置は、発泡槽１と、ジャケット部２と、温調制御部１０と、を備えている。発泡槽１は、発泡粒子の製造に使用される従来公知のものであれば、特に限定されない。ジャケット部２は、発泡槽１と離間するように、発泡槽１の外周部を覆うように設けられている。 As shown in FIG. 1, the apparatus for producing foamed particles according to the present embodiment includes a foaming tank 1, a jacket unit 2, and a temperature control unit 10. The foam tank 1 is not particularly limited as long as it is a conventionally known one used for producing foamed particles. The jacket portion 2 is provided so as to cover the outer peripheral portion of the foam tank 1 so as to be separated from the foam tank 1.

温調制御部１０は、ジャケット部２に蒸気を供給する供給管１１を有している。供給管１１から供給される蒸気は、発泡槽１とジャケット部２との間の空間に満たされる。そして、この蒸気によって、発泡槽１の内部は加熱される。温調制御部１０は、ジャケット部２へ供給される蒸気量を調節することによって、発泡槽１内の温度を調節する。なお、本実施形態では、供給管１１を流れる加熱媒体として蒸気を用いている。しかし、供給管１１を流れる加熱媒体は、これに限定されるものではなく、発泡槽１に投入される熱可塑性樹脂の種類に応じて他の加熱媒体、例えば、オイル、加熱空気、蒸気と加熱空気との混合媒体などを用いることができる。 The temperature control unit 10 has a supply pipe 11 that supplies steam to the jacket unit 2. The steam supplied from the supply pipe 11 fills the space between the foam tank 1 and the jacket portion 2. Then, the inside of the foam tank 1 is heated by this steam. The temperature control unit 10 adjusts the temperature inside the foam tank 1 by adjusting the amount of steam supplied to the jacket unit 2. In this embodiment, steam is used as the heating medium flowing through the supply pipe 11. However, the heating medium flowing through the supply pipe 11 is not limited to this, and is heated with other heating media such as oil, heated air, and steam depending on the type of the thermoplastic resin charged into the foam tank 1. A mixed medium with air or the like can be used.

温調制御部１０は、供給管１１と、減圧弁１２（第１の減圧弁）と、開閉弁１３ａ〜１３ｃと、制御弁１４ｂおよび１４ｃ（第１の制御弁）と、を備えている。減圧弁１２は、上流側の蒸気供給源から送られる高圧蒸気の圧力を最適圧力に減圧する弁であり、ジャケット部２へ供給される蒸気の圧力を一定に保つ。 The temperature control control unit 10 includes a supply pipe 11, a pressure reducing valve 12 (first pressure reducing valve), on-off valves 13a to 13c, and control valves 14b and 14c (first control valve). The pressure reducing valve 12 is a valve that reduces the pressure of the high-pressure steam sent from the steam supply source on the upstream side to the optimum pressure, and keeps the pressure of the steam supplied to the jacket portion 2 constant.

分岐管１１ａ〜１１ｃは、供給管１１における減圧弁１２の下流側から分岐している。分岐管１１ａ〜１１ｃはそれぞれ、蒸気供給量が異なるように構成されている。分岐管１１ａ〜１１ｃは、この順で蒸気供給量が大きくなるように構成されている。図１に示される構成において、例えば、発泡槽１の容量２〜４ｍ３に対して、分岐管１１ａは、呼び径５０Ａ（外径：６０．５ｍｍ）であり、分岐管１１ｂは、呼び径２５Ａ（外径：３４．０ｍｍ）であり、分岐管１１ｃは、呼び径１５Ａ（外径：２１．７ｍｍ）である。 The branch pipes 11a to 11c branch from the downstream side of the pressure reducing valve 12 in the supply pipe 11. The branch pipes 11a to 11c are configured so that the amount of steam supplied is different from each other. The branch pipes 11a to 11c are configured so that the amount of steam supplied increases in this order. In the configuration shown in FIG. 1, for example, the branch pipe 11a has a nominal diameter of 50 A (outer diameter: 60.5 mm) and the branch pipe 11b has a nominal diameter of 25 A with respect to the capacity of the foam tank 1 of 2 to 4 m 3. (Outer diameter: 34.0 mm), and the branch pipe 11c has a nominal diameter of 15 A (outer diameter: 21.7 mm).

開閉弁１３ａ〜１３ｃはそれぞれ、分岐管１１ａ〜１１ｃの開閉を切替える弁である。本実施形態に係る製造装置では、供給管１１における減圧弁１２の下流側で、蒸気供給量が異なる３つの分岐管に分岐されている。そして、開閉弁１３ａ〜１３ｃにより、分岐管１１ａ〜１１ｃそれぞれの開閉が切り替えられるようになっている。 The on-off valves 13a to 13c are valves for switching the opening and closing of the branch pipes 11a to 11c, respectively. In the manufacturing apparatus according to the present embodiment, the production apparatus is branched into three branch pipes having different steam supply amounts on the downstream side of the pressure reducing valve 12 in the supply pipe 11. Then, the on-off valves 13a to 13c can switch the opening and closing of each of the branch pipes 11a to 11c.

本実施形態に係る製造装置では、分岐管１１ａ〜１１ｃそれぞれにおいて、蒸気供給量が調節されるようになっている。制御弁１４ｂおよび１４ｃはそれぞれ、分岐管１１ｂおよび１１ｃの呼び径に対応した接続径を有し、分岐管１１ｂおよび１１ｃに接続されている。制御弁１４ｂは、分岐管１１ｂでの蒸気量を調節する弁であり、制御弁１４ｃは、分岐管１１ｃでの蒸気量を調節する弁である。制御弁１４ｂおよび１４ｃには、発泡槽１またはジャケット部２内の温度の測定値等がフィードバック制御される。制御弁１４ｂおよび１４ｃはそれぞれ、フィードバックされた前記測定値等に基づいて、分岐管１１ｂおよび１１ｃを流れる蒸気量を調節する。具体的には、制御弁１４ｂおよび１４ｃはそれぞれ、温度指示調節器（ＴＩＣ）に接続されている。当該温度指示調節器は、発泡槽１内の設定温度のデータが与えられ、発泡槽１内の温度データを測定し、設定温度データおよび測定温度データの両信号からＰＩＤ制御等のプロセス制御方式によって、発泡槽１内の温度が前記設定温度になるように、制御弁１４ｂおよび／または１４ｃの弁開度を制御する。これによって、分岐管１１ｂおよび／または１１ｃを流れる蒸気の流量が調節される。また、蒸気供給量が最も大きい分岐管１１ａには、制御弁が設けられていない。 In the manufacturing apparatus according to the present embodiment, the steam supply amount is adjusted in each of the branch pipes 11a to 11c. The control valves 14b and 14c have connection diameters corresponding to the nominal diameters of the branch pipes 11b and 11c, respectively, and are connected to the branch pipes 11b and 11c. The control valve 14b is a valve that regulates the amount of steam in the branch pipe 11b, and the control valve 14c is a valve that regulates the amount of steam in the branch pipe 11c. The control valves 14b and 14c are feedback-controlled with measured values of the temperature inside the foam tank 1 or the jacket portion 2. The control valves 14b and 14c adjust the amount of steam flowing through the branch pipes 11b and 11c, respectively, based on the fed-back measured values and the like. Specifically, the control valves 14b and 14c are each connected to a temperature indicator (TIC). The temperature indicator controller is given the data of the set temperature in the foam tank 1, measures the temperature data in the foam tank 1, and uses a process control method such as PID control from both the set temperature data and the measured temperature data signals. , The valve opening degree of the control valve 14b and / or 14c is controlled so that the temperature in the foam tank 1 becomes the set temperature. This regulates the flow rate of steam flowing through the branch pipes 11b and / or 11c. Further, the branch pipe 11a having the largest steam supply amount is not provided with a control valve.

本実施形態に係る製造装置は、開閉弁切替制御部２１（切替制御部）を備えている。開閉弁切替制御部２１は、開閉弁１３ａ〜１３ｃの開閉切替を制御するためのものである。開閉弁切替制御部２１は、発泡工程中の発泡槽１内の温度に応じて、開閉弁１３ａ〜１３ｃの開閉切替を制御する。開閉弁切替制御部２１によって分岐管１１ａ〜１１ｃの開閉が切り替えられるので、この切り替えに応じて、ジャケット部２へ供給される蒸気量は変化する。 The manufacturing apparatus according to this embodiment includes an on-off valve switching control unit 21 (switching control unit). The on-off valve switching control unit 21 is for controlling the on-off switching of the on-off valves 13a to 13c. The on-off valve switching control unit 21 controls the on-off switching of the on-off valves 13a to 13c according to the temperature in the foam tank 1 during the foaming process. Since the on-off valve switching control unit 21 switches the opening and closing of the branch pipes 11a to 11c, the amount of steam supplied to the jacket unit 2 changes according to this switching.

（開閉弁切替制御部２１による蒸気供給量の制御）
本実施形態に係る製造装置では、ジャケット部２への蒸気供給量の範囲は、開閉弁切替制御部２１によって制御されている。また、本実施形態に係る発泡粒子の製造方法は、図１に示した製造装置を用いた方法であり、複数の分岐管１１ａ〜１１ｃの開閉切替を制御するとともに、分岐管１１ｂおよび１１ｃでの蒸気量を制御弁１４ｂおよび１４ｃにより調節する。そして、このような制御方式により、発泡工程中の発泡槽１内の昇温から発泡終了までの発泡槽１内の温度が精密に制御され得る。 (Control of steam supply amount by on-off valve switching control unit 21)
In the manufacturing apparatus according to the present embodiment, the range of the amount of steam supplied to the jacket portion 2 is controlled by the on-off valve switching control unit 21. Further, the method for producing foamed particles according to the present embodiment is a method using the manufacturing apparatus shown in FIG. 1, which controls opening / closing switching of a plurality of branch pipes 11a to 11c and uses the branch pipes 11b and 11c. The amount of steam is adjusted by the control valves 14b and 14c. Then, by such a control method, the temperature in the foaming tank 1 from the temperature rise in the foaming tank 1 during the foaming process to the end of foaming can be precisely controlled.

開閉弁切替制御部２１による蒸気供給量の制御について、図２を参照して説明する。図２は、発泡工程中の発泡槽１の内温設定の一例、および当該内温設定に対応した分岐管１１ａ〜１１ｃの切替制御を示すグラフである。なお、図２においては、分岐管１１ａの口径をＤ１とし、分岐管１１ｂの口径をＤ２とし、分岐管１１ｃの口径をＤ３としている。そして、口径Ｄ１〜Ｄ３の大きさは、Ｄ１＞Ｄ２＞Ｄ３となっている。 The control of the steam supply amount by the on-off valve switching control unit 21 will be described with reference to FIG. FIG. 2 is a graph showing an example of the internal temperature setting of the foaming tank 1 during the foaming process and the switching control of the branch pipes 11a to 11c corresponding to the internal temperature setting. In FIG. 2, the diameter of the branch pipe 11a is D1, the diameter of the branch pipe 11b is D2, and the diameter of the branch pipe 11c is D3. The sizes of the diameters D1 to D3 are D1> D2> D3.

まず、開閉弁切替制御部２１は、開閉弁１３ａのみを開放して発泡槽１の昇温をスタートさせる。これにより、分岐管１１ａのみを通過して蒸気がジャケット部２へ流れる。このとき、分岐管１１ａの口径Ｄ１は、分岐管１１ａ〜１１ｃの口径の中で最も大きい口径である。それゆえ、ジャケット部２への蒸気供給量が最も大きくなる。このため、ジャケット部２には分岐管１１ａを介して最大量の蒸気が供給され続ける。これにより、発泡槽１内の温度を速く上昇させることができる（発泡槽１の内温上昇速度：傾きＳ１）。 First, the on-off valve switching control unit 21 opens only the on-off valve 13a to start the temperature rise of the foam tank 1. As a result, steam passes only through the branch pipe 11a and flows to the jacket portion 2. At this time, the diameter D1 of the branch pipe 11a is the largest diameter among the diameters of the branch pipes 11a to 11c. Therefore, the amount of steam supplied to the jacket portion 2 is the largest. Therefore, the maximum amount of steam is continuously supplied to the jacket portion 2 via the branch pipe 11a. As a result, the temperature inside the foam tank 1 can be raised quickly (internal temperature rise rate of the foam tank 1: inclination S1).

次いで、発泡槽１内の温度が所定の設定温度Ｔ１に到達した後、所定のタイミングで、開閉弁切替制御部２１は、開閉弁１３ａを閉じ開閉弁１３ｂのみを開放するように制御する。このとき、分岐管１１ｂのみを通過した蒸気がジャケット部２へ流れる。温度指示調節器（ＴＩＣ）は、発泡槽１内の温度が設定温度Ｔ１から設定温度Ｔ２へ到達するように、制御弁１４ｂの弁開度を調節する。この制御弁１４ｂの調節により、ジャケット部２への蒸気供給量が調節される。分岐管１１ｂの口径Ｄ２が分岐管１１ａの口径Ｄ１よりも小さいので、ジャケット部２への蒸気供給速度は減少する。このような蒸気供給速度が減少した状態で、発泡槽１内の温度を設定温度Ｔ２へオーバーシュートせずに到達させるために、温度指示調節器（ＴＩＣ）には、内温上昇速度が異なる２本の折れ線（発泡槽１の内温上昇速度：傾きＳ２、Ｓ２’、傾きの大きさ：Ｓ２＞Ｓ２’）として発泡槽１内の温度の設定値が与えられる。また、温度指示調節器（ＴＩＣ）は、発泡槽１内の温度測定値に基づいて、発泡槽１内の温度が前記折れ線の設定値に沿うように、制御弁１４ｂの開弁度を調節し、これによりジャケット部２への蒸気供給量が調節される。このような蒸気供給量の調節により、発泡槽１内の温度を設定温度Ｔ１からゆるやかに上昇させて、目標の設定温度Ｔ２に到達させることができる。 Next, after the temperature in the foam tank 1 reaches the predetermined set temperature T1, the on-off valve switching control unit 21 controls to close the on-off valve 13a and open only the on-off valve 13b at a predetermined timing. At this time, the steam that has passed only through the branch pipe 11b flows to the jacket portion 2. The temperature indicator (TIC) adjusts the valve opening degree of the control valve 14b so that the temperature in the foam tank 1 reaches the set temperature T1 from the set temperature T2. By adjusting the control valve 14b, the amount of steam supplied to the jacket portion 2 is adjusted. Since the diameter D2 of the branch pipe 11b is smaller than the diameter D1 of the branch pipe 11a, the steam supply rate to the jacket portion 2 decreases. In order to allow the temperature in the foam tank 1 to reach the set temperature T2 without overshooting in such a state where the steam supply rate is reduced, the temperature indicator (TIC) has a different internal temperature rise rate2. A set value of the temperature inside the foam tank 1 is given as a broken line (internal temperature rise rate of the foam tank 1: slope S2, S2', magnitude of slope: S2> S2'). Further, the temperature indicator (TIC) adjusts the valve opening degree of the control valve 14b based on the temperature measurement value in the foam tank 1 so that the temperature in the foam tank 1 is in line with the set value of the polygonal line. As a result, the amount of steam supplied to the jacket portion 2 is adjusted. By adjusting the amount of steam supplied in this way, the temperature inside the foam tank 1 can be gradually raised from the set temperature T1 to reach the target set temperature T2.

さらに、発泡槽１内の温度が設定温度Ｔ２に到達した後、所定のタイミングで、開閉弁切替制御部２１は、開閉弁１３ｂを閉じ開閉弁１３ｃのみを開放するように制御する。このとき、分岐管１１ｃのみを通過して蒸気がジャケット部２へ流れる。温度指示調節器（ＴＩＣ）は、発泡槽１内の温度が設定温度Ｔ２から設定温度Ｔ３へ到達するように、制御弁１４ｃの弁開度を調節する。この制御弁１４ｃの調節により、ジャケット部２への蒸気供給量が調節される。分岐管１１ｃの口径Ｄ３は、分岐管１１ｂの口径Ｄ２よりも小さので、ジャケット部２への蒸気供給速度はさらに減少する。このような蒸気供給速度が減少した状態で、発泡槽１内の温度を目標の設定温度Ｔ３へオーバーシュートせずに到達させるために、温度指示調節器（ＴＩＣ）には、設定温度Ｔ２から設定温度Ｔ３へ向かう直線として発泡槽１内の温度の設定値が与えられる。また、温度指示調節器（ＴＩＣ）は、発泡槽１内の温度測定値に基づいて、発泡槽１内の温度が設定温度Ｔ２から目標の設定温度Ｔ３への設定値の直線に沿うように、制御弁１４ｃの弁開度を調節し、これにより、ジャケット部２への蒸気供給量が調節される。このような蒸気供給量の調節により、発泡槽１内の温度を目標の設定温度Ｔ３に到達させることができる（発泡槽１の内温上昇速度：傾きＳ３）。 Further, after the temperature in the foam tank 1 reaches the set temperature T2, the on-off valve switching control unit 21 controls to close the on-off valve 13b and open only the on-off valve 13c at a predetermined timing. At this time, steam passes only through the branch pipe 11c and flows to the jacket portion 2. The temperature indicator (TIC) adjusts the valve opening degree of the control valve 14c so that the temperature in the foam tank 1 reaches the set temperature T2 from the set temperature T2. By adjusting the control valve 14c, the amount of steam supplied to the jacket portion 2 is adjusted. Since the diameter D3 of the branch pipe 11c is smaller than the diameter D2 of the branch pipe 11b, the steam supply rate to the jacket portion 2 is further reduced. In order to allow the temperature in the foam tank 1 to reach the target set temperature T3 without overshooting in such a state where the steam supply rate is reduced, the temperature indicator (TIC) is set from the set temperature T2. The set value of the temperature in the foam tank 1 is given as a straight line toward the temperature T3. Further, the temperature indicator (TIC) is based on the temperature measurement value in the foam tank 1 so that the temperature in the foam tank 1 follows a straight line of the set value from the set temperature T2 to the target set temperature T3. The valve opening degree of the control valve 14c is adjusted, whereby the amount of steam supplied to the jacket portion 2 is adjusted. By adjusting the amount of steam supplied in this way, the temperature inside the foam tank 1 can reach the target set temperature T3 (internal temperature rise rate of the foam tank 1: inclination S3).

このように開閉弁切替制御部２１は、蒸気供給量が最も大きい分岐管１１ａから蒸気供給量が最も小さい分岐管１１ｃへ順に、開閉を切替えるように構成されている。これにより、発泡槽１内の温度は、設定温度Ｔ１から設定温度Ｔ３へと、精密にかつ再現性を高めて調節できる。本実施形態に係る製造装置によれば、発泡槽１内の温度を最大１６０℃で±０．１℃以内に精密に制御することができる。 As described above, the on-off valve switching control unit 21 is configured to switch the opening and closing in order from the branch pipe 11a having the largest steam supply amount to the branch pipe 11c having the smallest steam supply amount. As a result, the temperature inside the foam tank 1 can be adjusted precisely and with high reproducibility from the set temperature T1 to the set temperature T3. According to the manufacturing apparatus according to the present embodiment, the temperature inside the foam tank 1 can be precisely controlled within ± 0.1 ° C. at a maximum of 160 ° C.

このように、本実施形態に係る製造装置では、開閉弁切替制御部２１による開閉弁１３ａ〜１３ｃの切替制御により、発泡槽１内の温度を、設定温度Ｔ１、Ｔ２およびＴ３に３段階で制御することができる。それゆえ、本実施形態に係る製造装置によれば、従来の製造装置と比較して、精密にかつ再現性を高めて発泡槽１内の温度を制御することができる。 As described above, in the manufacturing apparatus according to the present embodiment, the temperature inside the foam tank 1 is controlled to the set temperatures T1, T2 and T3 in three stages by the switching control of the on-off valves 13a to 13c by the on-off valve switching control unit 21. can do. Therefore, according to the manufacturing apparatus according to the present embodiment, it is possible to control the temperature in the foam tank 1 more precisely and with higher reproducibility as compared with the conventional manufacturing apparatus.

図１に示される構成では、供給管１１は３つの分岐管１１ａ〜１１ｃを有していた。しかし、本実施形態に係る製造装置において、分岐管の数は、複数であればよく、発泡槽１の寸法（容量）または発泡工程中の発泡槽１内の温度制御の方法や精度に応じて適宜設定可能である。また、分岐管１１ａ〜１１ｃの蒸気供給量を規定する呼び径も、図１に示される構成に限定されず、発泡槽１の寸法または発泡工程中の発泡槽１内の温度制御の精度に応じて適宜設定可能である。 In the configuration shown in FIG. 1, the supply pipe 11 had three branch pipes 11a to 11c. However, in the manufacturing apparatus according to the present embodiment, the number of branch pipes may be a plurality, depending on the size (capacity) of the foam tank 1 or the method and accuracy of temperature control in the foam tank 1 during the foaming process. It can be set as appropriate. Further, the nominal diameter that defines the steam supply amount of the branch pipes 11a to 11c is not limited to the configuration shown in FIG. 1, and depends on the size of the foam tank 1 or the accuracy of temperature control in the foam tank 1 during the foaming process. Can be set as appropriate.

本実施形態における制御弁は、分岐管１１ａ〜１１ｃの少なくとも１つに設けられていればよい。例えば、発泡槽１内の昇温初期に使用される分岐管１１ａには、制御弁が設けられていてもよいし、図１に示すように制御弁が設けられていなくてもよい。制御弁の設置の有無は、分岐管の構成または発泡槽１内の温度制御動作に応じて適宜設定することができる。また、制御弁１４ｂおよび１４ｃは、従来公知の制御弁であればよい。制御弁１４ｂおよび１４ｃは、発泡槽１内の温度測定値のデータをフィードバックする構成に限定されない。 The control valve in the present embodiment may be provided in at least one of the branch pipes 11a to 11c. For example, the branch pipe 11a used in the initial stage of temperature rise in the foam tank 1 may be provided with a control valve, or may not be provided with a control valve as shown in FIG. Whether or not the control valve is installed can be appropriately set according to the configuration of the branch pipe or the temperature control operation in the foam tank 1. Further, the control valves 14b and 14c may be any conventionally known control valves. The control valves 14b and 14c are not limited to the configuration in which the data of the temperature measurement value in the foam tank 1 is fed back.

また、開閉弁切替制御部２１は、開閉弁１３ａ〜１３ｃの開閉切替を制御するためのものである。開閉弁切替制御部２１の切り替え動作は、分岐管１１ａから分岐管１１ｃへ順に、開閉を切替える動作に限定されない。例えば、開閉弁切替制御部２１は、開閉弁１３ａ〜１３ｃのうち、２つの開閉弁を開くと共に、残りの開閉弁を閉じるように制御してもよい。この場合、開閉弁切替制御部２１は、前記２つの開閉弁について開放度合いを変えて制御してもよい。例えば、一方の開閉弁が１００％開放する一方、他方の開閉弁は２５％開放するように、開閉弁切替制御部２１は、前記２つの開閉弁を制御してもよい。 Further, the on-off valve switching control unit 21 is for controlling the on-off switching of the on-off valves 13a to 13c. The switching operation of the on-off valve switching control unit 21 is not limited to the operation of switching the opening / closing in order from the branch pipe 11a to the branch pipe 11c. For example, the on-off valve switching control unit 21 may control to open two on-off valves and close the remaining on-off valves among the on-off valves 13a to 13c. In this case, the on-off valve switching control unit 21 may control the two on-off valves by changing the degree of opening. For example, the on-off valve switching control unit 21 may control the two on-off valves so that one on-off valve opens 100% and the other on-off valve opens 25%.

また、開閉弁切替制御部２１は、開閉弁１３ａ〜１３ｃの開閉切替を制御することができる要素または部材で構成されていればよい。例えば、開閉弁切替制御部２１は、発泡槽１内の温度を測定する測定機能と、測定温度が所定温度（例えば設定温度Ｔ１、Ｔ２またはＴ３）を超える、あるいは下回ったときに発泡槽１内の温度を前記所定温度に制御する制御機能と、発泡槽１内の温度が前記所定温度に到達したことを使用者に通知する通知機能と、を備えた構成であってもよい。 Further, the on-off valve switching control unit 21 may be composed of an element or a member capable of controlling the on-off switching of the on-off valves 13a to 13c. For example, the on-off valve switching control unit 21 has a measuring function for measuring the temperature inside the foam tank 1 and inside the foam tank 1 when the measured temperature exceeds or falls below a predetermined temperature (for example, set temperatures T1, T2 or T3). The configuration may include a control function for controlling the temperature of the above-mentioned temperature to the predetermined temperature, and a notification function for notifying the user that the temperature in the foam tank 1 has reached the predetermined temperature.

また、開閉弁切替制御部２１は、集積回路（ＩＣチップ）等に形成された論理回路（ハードウェア）によって実現してもよいし、ＣＰＵ（Central Processing Unit）を用いてソフトウェアによって実現してもよい。このような開閉弁切替制御部２１を備えたことによって、開閉弁１３ａ〜１３ｃの開閉切替制御の自動化を実現することができる。 Further, the on-off valve switching control unit 21 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by software using a CPU (Central Processing Unit). Good. By providing such an on-off valve switching control unit 21, it is possible to realize automation of on-off switching control of the on-off valves 13a to 13c.

この場合、本実施形態に係る製造装置は、各機能を実現するソフトウェアであるプログラムの命令を実行するＣＰＵ、上記プログラムおよび各種データがコンピュータ（またはＣＰＵ）で読み取り可能に記録されたＲＯＭ（Read Only Memory）または記憶装置（これらを「記録媒体」と称する）、上記プログラムを展開するＲＡＭ（Random Access Memory）などを備えている。そして、コンピュータ（またはＣＰＵ）が上記プログラムを上記記録媒体から読み取って実行することにより、本開示の目的が達成される。上記記録媒体としては、「一時的でない有形の媒体」、例えば、テープ、ディスク、カード、半導体メモリ、プログラマブルな論理回路などを用いることができる。また、上記プログラムは、該プログラムを伝送可能な任意の伝送媒体（通信ネットワークや放送波等）を介して上記コンピュータに供給されてもよい。なお、本発明は、上記プログラムが電子的な伝送によって具現化された、搬送波に埋め込まれたデータ信号の形態でも実現され得る。 In this case, the manufacturing apparatus according to the present embodiment is a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read Only) in which the above program and various data are readablely recorded by a computer (or CPU). It is equipped with a Memory) or a storage device (these are referred to as "recording media"), a RAM (Random Access Memory) for developing the above program, and the like. Then, when the computer (or CPU) reads the program from the recording medium and executes it, the object of the present disclosure is achieved. As the recording medium, a "non-temporary tangible medium", for example, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. Further, the program may be supplied to the computer via an arbitrary transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the above program is embodied by electronic transmission.

〔実施形態２〕
本発明の他の実施形態について、以下に説明する。なお、説明の便宜上、上記実施形態にて説明した部材と同じ機能を有する部材については、同じ符号を付記し、その説明を繰り返さない。図３は、本実施形態に係る発泡粒子の製造装置の概略構成を模式的に示した図である。 [Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated. FIG. 3 is a diagram schematically showing a schematic configuration of a foamed particle manufacturing apparatus according to the present embodiment.

図３に示されるように、本実施形態に係る製造装置は、ジャケット部２へ蒸気を供給する供給管が分岐されていない点が前記実施形態１と異なる。当該製造装置では、温調制御部１０Ａは、ただ１つの供給管１１ｄを備えている。供給管１１ｄの呼び径は、８０Ａ（外径：８９．１ｍｍ）である。 As shown in FIG. 3, the manufacturing apparatus according to the present embodiment is different from the first embodiment in that the supply pipe for supplying steam to the jacket portion 2 is not branched. In the manufacturing apparatus, the temperature control unit 10A includes only one supply pipe 11d. The nominal diameter of the supply pipe 11d is 80A (outer diameter: 89.1 mm).

温調制御部１０Ａは、減圧弁１５（第２の減圧弁）と、開閉弁１３ｄと、制御弁１４ｄ（第２の制御弁）と、を備えている。供給管１１ｄには、蒸気供給源がある上流側から下流側（ジャケット部２側）へ向かって、減圧弁１５、開閉弁１３ｄ、および制御弁１４ｄがこの順に設けられている。減圧弁１５は、上流側の蒸気供給源から送られる蒸気の圧力を減圧して、下流側へ送る弁である。また、開閉弁１３ｄは、供給管１１ｄを開閉するための弁である。 The temperature control control unit 10A includes a pressure reducing valve 15 (second pressure reducing valve), an on-off valve 13d, and a control valve 14d (second control valve). The supply pipe 11d is provided with a pressure reducing valve 15, an on-off valve 13d, and a control valve 14d in this order from the upstream side where the steam supply source is located to the downstream side (jacket portion 2 side). The pressure reducing valve 15 is a valve that reduces the pressure of steam sent from the steam supply source on the upstream side and sends it to the downstream side. The on-off valve 13d is a valve for opening and closing the supply pipe 11d.

また、制御弁１４ｄは、供給管１１ｄにおける減圧弁１５の下流側に設けられ、ジャケット部２への蒸気流量を調節するための弁である。制御弁１４ｄによって、発泡槽１またはジャケット部２内の温度の測定値等がフィードバック制御される。制御弁１４ｄは、フィードバックされた前記測定値等に基づいて、供給管１１ｄを流れる蒸気量を調節する。具体的には、制御弁１４ｄは、温度指示調節器（ＴＩＣ）に接続されている。当該温度指示調節器は、発泡槽１内の設定温度のデータが与えられ、発泡槽１内の温度データを測定し、設定温度データおよび測定温度データの両信号からＰＩＤ制御等のプロセス制御方式によって、発泡槽１内の温度が前記設定温度になるように、制御弁１４ｄの弁開度を制御する。これによって、供給管１１ｄを流れる蒸気の流量が調節される。 Further, the control valve 14d is provided on the downstream side of the pressure reducing valve 15 in the supply pipe 11d, and is a valve for adjusting the steam flow rate to the jacket portion 2. The control valve 14d feedback-controls the measured value of the temperature in the foam tank 1 or the jacket portion 2. The control valve 14d adjusts the amount of steam flowing through the supply pipe 11d based on the fed-back measured value and the like. Specifically, the control valve 14d is connected to a temperature indicator (TIC). The temperature indicator controller is given the data of the set temperature in the foam tank 1, measures the temperature data in the foam tank 1, and uses a process control method such as PID control from both the set temperature data and the measured temperature data signals. The valve opening degree of the control valve 14d is controlled so that the temperature inside the foam tank 1 becomes the set temperature. As a result, the flow rate of steam flowing through the supply pipe 11d is adjusted.

本実施形態に係る製造装置は、減圧弁圧力制御部２２を備えている。減圧弁圧力制御部２２は、減圧弁１５を制御し、供給管１１ｄを流れる蒸気の圧力を上昇または降下させる。この減圧弁圧力制御部２２によって、ジャケット部２への蒸気の供給速度が変化する。そして、この変化に応じて、ジャケット部２へ供給される蒸気量は変化する。 The manufacturing apparatus according to this embodiment includes a pressure reducing valve pressure control unit 22. The pressure reducing valve pressure control unit 22 controls the pressure reducing valve 15 to increase or decrease the pressure of steam flowing through the supply pipe 11d. The pressure reducing valve pressure control unit 22 changes the supply speed of steam to the jacket unit 2. Then, the amount of steam supplied to the jacket portion 2 changes according to this change.

（減圧弁圧力制御部２２による蒸気供給量の制御）
本実施形態に係る製造装置では、ジャケット部２への蒸気供給圧力は、減圧弁圧力制御部２２によって制御されている。また、本実施形態に係る発泡粒子の製造方法は、図３に示した製造装置を用いた方法であり、減圧弁１５にて圧力設定し、供給管１１ｄを流れる蒸気の圧力を上昇または降下させるとともに、ジャケット部２への蒸気流量を制御弁１４ｄにより調節する。そして、このような制御により、発泡工程中の発泡槽１内の温度制御が精密に制御され得る。 (Control of steam supply amount by pressure reducing valve pressure control unit 22)
In the manufacturing apparatus according to the present embodiment, the steam supply pressure to the jacket portion 2 is controlled by the pressure reducing valve pressure control unit 22. Further, the method for producing foamed particles according to the present embodiment is a method using the manufacturing apparatus shown in FIG. 3, in which the pressure is set by the pressure reducing valve 15 to increase or decrease the pressure of the steam flowing through the supply pipe 11d. At the same time, the steam flow rate to the jacket portion 2 is adjusted by the control valve 14d. Then, by such control, the temperature control in the foaming tank 1 during the foaming process can be precisely controlled.

減圧弁圧力制御部２２による蒸気供給量の制御について、図４を参照して説明する。図４は、発泡工程中の発泡槽１内の内温の時間的変化の一例、および当該時間的変化に対応した減圧弁１５の設定圧力切替制御を示す図である。なお、図４においては、減圧弁圧力制御部２２は、減圧弁１５の設定圧力をＰ１、Ｐ２、Ｐ３の３つの圧力に設定する。そして、設定圧力Ｐ１〜Ｐ３の大きさは、Ｐ１＞Ｐ２＞Ｐ３となっている。 The control of the steam supply amount by the pressure reducing valve pressure control unit 22 will be described with reference to FIG. FIG. 4 is a diagram showing an example of a temporal change in the internal temperature in the foaming tank 1 during the foaming process, and a set pressure switching control of the pressure reducing valve 15 corresponding to the temporal change. In FIG. 4, the pressure reducing valve pressure control unit 22 sets the set pressure of the pressure reducing valve 15 to three pressures, P1, P2, and P3. The magnitudes of the set pressures P1 to P3 are P1> P2> P3.

まず、減圧弁圧力制御部２２は、供給管１１ｄを流れる蒸気の圧力が設定圧力Ｐ１となるように減圧弁１５を制御する。これにより、設定圧力Ｐ１の蒸気が供給管１１ｄを通過してジャケット部２へ流れる。このとき、ジャケット部２には設定圧力Ｐ１の蒸気が供され続け、発泡槽１内の温度は設定温度Ｔ１へ昇温される（発泡槽１の内温上昇速度：傾きＳ１）。 First, the pressure reducing valve pressure control unit 22 controls the pressure reducing valve 15 so that the pressure of the steam flowing through the supply pipe 11d becomes the set pressure P1. As a result, the steam at the set pressure P1 passes through the supply pipe 11d and flows to the jacket portion 2. At this time, steam of the set pressure P1 continues to be supplied to the jacket portion 2, and the temperature inside the foam tank 1 is raised to the set temperature T1 (internal temperature rise rate of the foam tank 1: inclination S1).

次いで、発泡槽１内の温度が所定の設定温度Ｔ１に到達した後、所定のタイミングで、減圧弁圧力制御部２２は、供給管１１ｄを流れる蒸気の圧力が設定圧力Ｐ１よりも低い設定圧力Ｐ２になるように、減圧弁１５を制御する。温度指示調節器（ＴＩＣ）は、発泡槽１内の温度が設定温度Ｔ１から設定温度Ｔ２へ到達するように、制御弁１４ｄの弁開度を調節する。この制御弁１４ｄの調節により、ジャケット部２への蒸気供給量が調節される。このとき、ジャケット部２へ供給される蒸気の圧力は、設定圧力Ｐ１よりも低い設定圧力Ｐ２となるので、ジャケット部２への蒸気供給速度は減少する。このような蒸気供給速度が減少した状態で、発泡槽１内の温度を設定温度Ｔ２へオーバーシュートせずに到達させるために、温度指示調節器（ＴＩＣ）には、内温上昇速度が異なる２本の折れ線（発泡槽１の内温上昇速度：傾きＳ２、Ｓ２’、傾きの大きさ：Ｓ２＞Ｓ２’）として発泡槽１内の温度の設定値が与えられる。また、温度指示調節器（ＴＩＣ）は、発泡槽１内の温度測定値に基づいて、発泡槽１内の温度が前記折れ線の設定値に沿うように、制御弁１４ｄの開弁度を調節し、これによりジャケット部２への蒸気供給量が調節される。このような蒸気供給量の調節により、発泡槽１内の温度を設定温度Ｔ１からゆるやかに上昇させて、目標の設定温度Ｔ２に到達させることができる。 Next, after the temperature in the foam tank 1 reaches the predetermined set temperature T1, at a predetermined timing, the pressure reducing valve pressure control unit 22 has the set pressure P2 in which the pressure of the steam flowing through the supply pipe 11d is lower than the set pressure P1. The pressure reducing valve 15 is controlled so as to be. The temperature indicator (TIC) adjusts the valve opening degree of the control valve 14d so that the temperature in the foam tank 1 reaches the set temperature T1 from the set temperature T2. By adjusting the control valve 14d, the amount of steam supplied to the jacket portion 2 is adjusted. At this time, the pressure of the steam supplied to the jacket portion 2 becomes the set pressure P2 lower than the set pressure P1, so that the steam supply speed to the jacket portion 2 decreases. In order to allow the temperature in the foam tank 1 to reach the set temperature T2 without overshooting in such a state where the steam supply rate is reduced, the temperature indicator (TIC) has a different internal temperature rise rate2. A set value of the temperature inside the foam tank 1 is given as a broken line (internal temperature rise rate of the foam tank 1: slope S2, S2', magnitude of slope: S2> S2'). Further, the temperature indicator (TIC) adjusts the valve opening degree of the control valve 14d based on the temperature measurement value in the foam tank 1 so that the temperature in the foam tank 1 is in line with the set value of the polygonal line. As a result, the amount of steam supplied to the jacket portion 2 is adjusted. By adjusting the amount of steam supplied in this way, the temperature inside the foam tank 1 can be gradually raised from the set temperature T1 to reach the target set temperature T2.

さらに、発泡槽１内の温度が設定温度Ｔ２に到達した後、所定のタイミングで、減圧弁圧力制御部２２は、供給管１１ｄを流れる蒸気の圧力が設定圧力Ｐ２よりも低い設定圧力Ｐ３になるように、減圧弁１５を制御する。温度指示調節器（ＴＩＣ）は、発泡槽１内の温度が設定温度Ｔ２から設定温度Ｔ３へ到達するように、制御弁１４ｄの弁開度を調節する。この制御弁１４ｄの調節により、ジャケット部２への蒸気供給量が調節される。このとき、ジャケット部２へ供給される蒸気の圧力は、設定圧力Ｐ２よりも低い設定圧力Ｐ３となるので、ジャケット部２への蒸気供給速度はさらに減少する。このような蒸気供給速度が減少した状態で、発泡槽１内の温度を設定温度Ｔ３へオーバーシュートせずに到達させるために、温度指示調節器（ＴＩＣ）には、設定温度Ｔ２から設定温度Ｔ３へ向かう直線として発泡槽１内の温度の設定値が与えられる。また、温度指示調節器（ＴＩＣ）は、発泡槽１内の温度測定値に基づいて、発泡槽１内の温度が設定温度Ｔ２から目標の設定温度Ｔ３への設定値の直線に沿うように、制御弁１４ｃの弁開度を調節し、これにより、ジャケット部２への蒸気供給量が調節される。このような蒸気供給量の調節により、発泡槽１内の温度を目標の設定温度Ｔ３に到達させることができる（発泡槽１の内温上昇速度：傾きＳ３）。 Further, after the temperature in the foam tank 1 reaches the set temperature T2, the pressure reducing valve pressure control unit 22 becomes the set pressure P3 in which the pressure of the steam flowing through the supply pipe 11d is lower than the set pressure P2 at a predetermined timing. As a result, the pressure reducing valve 15 is controlled. The temperature indicator (TIC) adjusts the valve opening degree of the control valve 14d so that the temperature in the foam tank 1 reaches the set temperature T2 from the set temperature T2. By adjusting the control valve 14d, the amount of steam supplied to the jacket portion 2 is adjusted. At this time, the pressure of the steam supplied to the jacket portion 2 becomes the set pressure P3 lower than the set pressure P2, so that the steam supply speed to the jacket portion 2 is further reduced. In order to allow the temperature in the foam tank 1 to reach the set temperature T3 without overshooting in such a state where the steam supply rate is reduced, the temperature indicator (TIC) is provided with the set temperature T2 to the set temperature T3. The set value of the temperature in the foam tank 1 is given as a straight line toward. Further, the temperature indicator (TIC) is based on the temperature measurement value in the foam tank 1 so that the temperature in the foam tank 1 follows a straight line of the set value from the set temperature T2 to the target set temperature T3. The valve opening degree of the control valve 14c is adjusted, whereby the amount of steam supplied to the jacket portion 2 is adjusted. By adjusting the amount of steam supplied in this way, the temperature inside the foam tank 1 can reach the target set temperature T3 (internal temperature rise rate of the foam tank 1: inclination S3).

このように減圧弁圧力制御部２２は、設定圧力Ｐ１からＰ３へ順に、段階的に蒸気圧が減少するように構成されている。これにより、発泡槽１内の設定温度の傾きをＳ１、Ｓ２、Ｓ２’、およびＳ３を与え、発泡槽１内の温度をＴ１、Ｔ２およびＴ３に３段階で昇温させることができる。それゆえ、本実施形態に係る製造装置によれば、従来の製造装置と比較して、精密にかつ再現性を高めて発泡槽１内の温度を制御することができる。 In this way, the pressure reducing valve pressure control unit 22 is configured to gradually reduce the vapor pressure from the set pressure P1 to P3. Thereby, the slope of the set temperature in the foam tank 1 is given S1, S2, S2', and S3, and the temperature in the foam tank 1 can be raised to T1, T2, and T3 in three steps. Therefore, according to the manufacturing apparatus according to the present embodiment, it is possible to control the temperature in the foam tank 1 more precisely and with higher reproducibility as compared with the conventional manufacturing apparatus.

また、制御弁１４ｄは、従来公知の制御弁であればよい。制御弁１４ｂおよび１４ｃは、発泡槽１内の温度測定値のデータをフィードバックする構成に限定されない。また、減圧弁圧力制御の変更段数は限定されないし、連続的に変更しても良い。発泡槽１内の設定温度およびその傾きも限定されない。 Further, the control valve 14d may be a conventionally known control valve. The control valves 14b and 14c are not limited to the configuration in which the data of the temperature measurement value in the foam tank 1 is fed back. Further, the number of stages for changing the pressure reducing valve pressure control is not limited, and may be changed continuously. The set temperature in the foam tank 1 and its inclination are not limited.

また、減圧弁圧力制御部２２は、減圧弁１５を制御するためのものである。それゆえ、減圧弁圧力制御部２２は、減圧弁１５を制御することができる要素または部材で構成されていればよい。例えば、減圧弁圧力制御部２２は、供給管１１ｄの圧力を測定する測定機能と、測定圧力が所定圧力（例えば設定圧力Ｐ１、Ｐ２またはＰ３）を超える、あるいは下回ったときに供給管１１ｄの圧力を前記所定圧力に制御する制御機能と、供給管１１ｄの圧力が前記所定圧力に到達したことを使用者に通知する通知機能と、を備えた構成であってもよい。 Further, the pressure reducing valve pressure control unit 22 is for controlling the pressure reducing valve 15. Therefore, the pressure reducing valve pressure control unit 22 may be composed of an element or a member capable of controlling the pressure reducing valve 15. For example, the pressure reducing valve pressure control unit 22 has a measuring function for measuring the pressure of the supply pipe 11d, and the pressure of the supply pipe 11d when the measured pressure exceeds or falls below a predetermined pressure (for example, set pressures P1, P2 or P3). May be configured to include a control function for controlling the pressure to the predetermined pressure and a notification function for notifying the user that the pressure of the supply pipe 11d has reached the predetermined pressure.

また、減圧弁圧力制御部２２は、集積回路（ＩＣチップ）等に形成された論理回路（ハードウェア）によって実現してもよいし、ＣＰＵ（Central Processing Unit）を用いてソフトウェアによって実現してもよい。このような減圧弁圧力制御部２２を備えたことによって、減圧弁１５の自動制御を実現することができる。 Further, the pressure reducing valve pressure control unit 22 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by software using a CPU (Central Processing Unit). Good. By providing such a pressure reducing valve pressure control unit 22, automatic control of the pressure reducing valve 15 can be realized.

この場合、本実施形態に係る製造装置は、各機能を実現するソフトウェアであるプログラムの命令を実行するＣＰＵ、上記プログラムおよび各種データがコンピュータ（またはＣＰＵ）で読み取り可能に記録されたＲＯＭ（Read Only Memory）または記憶装置（これらを「記録媒体」と称する）、上記プログラムを展開するＲＡＭ（Random Access Memory）などを備えている。そして、コンピュータ（またはＣＰＵ）が上記プログラムを上記記録媒体から読み取って実行することにより、本開示の目的が達成される。上記記録媒体としては、「一時的でない有形の媒体」、例えば、テープ、ディスク、カード、半導体メモリ、プログラマブルな論理回路などを用いることができる。また、上記プログラムは、該プログラムを伝送可能な任意の伝送媒体（通信ネットワークや放送波等）を介して上記コンピュータに供給されてもよい。なお、本発明は、上記プログラムが電子的な伝送によって具現化された、搬送波に埋め込まれたデータ信号の形態でも実現され得る。 In this case, the manufacturing apparatus according to the present embodiment is a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read Only) in which the above program and various data are readablely recorded by a computer (or CPU). It is equipped with a Memory) or a storage device (these are referred to as "recording media"), a RAM (Random Access Memory) for developing the above program, and the like. Then, when the computer (or CPU) reads the program from the recording medium and executes it, the object of the present disclosure is achieved. As the recording medium, a "non-temporary tangible medium", for example, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. Further, the program may be supplied to the computer via an arbitrary transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the above program is embodied by electronic transmission.

供給管１１ｄの蒸気供給量を規定する呼び径は、図３に示される構成に限定されず、発泡槽１の寸法または発泡工程中の発泡槽１内の温度制御に応じて適宜設定可能である。 The nominal diameter that defines the steam supply amount of the supply pipe 11d is not limited to the configuration shown in FIG. 3, and can be appropriately set according to the dimensions of the foam tank 1 or the temperature control in the foam tank 1 during the foaming process. ..

本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。 The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

〔まとめ〕
本発明の態様１に係る発泡粒子の製造装置は、発泡槽１と、前記発泡槽１の外周部に設けられたジャケット部２と、前記ジャケット部２へ蒸気を供給する供給管１１を有し、前記発泡槽１内の温度を調節する温調制御部１０と、を備え、前記温調制御部１０は、前記ジャケット部２へ供給される蒸気の圧力を一定に保つ第１の減圧弁（減圧弁１２）と、前記第１の減圧弁の下流側から分岐し、蒸気供給量が互いに異なる複数の分岐管１１ａ〜１１ｃと、前記複数の分岐管１１ａ〜１１ｃの開閉切替を制御するための切替制御部（開閉弁切替制御部２１）と、前記複数の分岐管１１ａ〜１１ｃの少なくとも１つに設けられ、当該分岐管での蒸気量を調節する第１の制御弁（制御弁１４ｂおよび１４ｃ）と、を備えた構成である。 [Summary]
The foam particle manufacturing apparatus according to the first aspect of the present invention includes a foam tank 1, a jacket portion 2 provided on the outer peripheral portion of the foam tank 1, and a supply pipe 11 for supplying steam to the jacket portion 2. A first pressure reducing valve (1) which includes a temperature control unit 10 for adjusting the temperature in the foam tank 1 and keeps the pressure of steam supplied to the jacket part 2 constant. A pressure reducing valve 12), a plurality of branch pipes 11a to 11c that branch from the downstream side of the first pressure reducing valve and have different steam supply amounts, and for controlling switching between opening and closing of the plurality of branch pipes 11a to 11c. A first control valve (control valves 14b and 14c) provided in at least one of the switching control unit (switching valve switching control unit 21) and the plurality of branch pipes 11a to 11c and adjusting the amount of steam in the branch pipe. ) And.

また、本発明の態様２に係る発泡粒子の製造装置は、態様１において、蒸気供給量が最も大きい分岐管１１ａには、前記第１の制御弁が設けられていない構成である。 Further, the apparatus for producing foamed particles according to the second aspect of the present invention has a configuration in which the first control valve is not provided in the branch pipe 11a having the largest steam supply amount in the first aspect.

また、本発明の態様３に係る発泡粒子の製造装置は、態様１または２において、前記切替制御部（開閉弁切替制御部２１）は、蒸気供給量が最も大きい分岐管１１ａから蒸気供給量が最も小さい分岐管１１ｃへ順に、開閉を切替えるように構成されている構成である。 Further, in the foamed particle manufacturing apparatus according to the third aspect of the present invention, in the first or second aspect, the switching control unit (switching valve switching control unit 21) has a steam supply amount from the branch pipe 11a having the largest steam supply amount. The configuration is such that opening and closing is switched in order to the smallest branch pipe 11c.

本発明の態様４に係る発泡粒子の製造装置は、発泡槽１と、前記発泡槽１の外周部に設けられたジャケット部２と、前記ジャケット部２へ蒸気を供給する供給管１１ｄを有し、前記発泡槽内の温度を調節する温調制御部１０Ａと、を備え、前記温調制御部１０Ａは、前記供給管１１ｄに設けられ、上流側の蒸気供給源から送られる蒸気の圧力を減圧して、下流側へ送る第２の減圧弁（減圧弁１５）と、前記供給管１１ｄにおける前記第２の減圧弁の下流側に設けられ、前記ジャケット部２への蒸気流量を調節する第２の制御弁（制御弁１４ｄ）と、前記第２の減圧弁を制御し、前記供給管を流れる蒸気の圧力を上昇または降下させる減圧弁圧力制御部２２と、を備えた構成である。 The foam particle manufacturing apparatus according to the fourth aspect of the present invention includes a foam tank 1, a jacket portion 2 provided on the outer peripheral portion of the foam tank 1, and a supply pipe 11d for supplying steam to the jacket portion 2. The temperature control unit 10A for adjusting the temperature in the foam tank is provided, and the temperature control unit 10A is provided in the supply pipe 11d to reduce the pressure of steam sent from the steam supply source on the upstream side. A second pressure reducing valve (pressure reducing valve 15) sent to the downstream side and a second pressure reducing valve provided on the downstream side of the second pressure reducing valve in the supply pipe 11d to adjust the steam flow rate to the jacket portion 2. The control valve (control valve 14d) and the pressure reducing valve pressure control unit 22 that controls the second pressure reducing valve and raises or lowers the pressure of steam flowing through the supply pipe.

本発明の態様５に係る発泡粒子の製造方法は、発泡槽１と、前記発泡槽１の外周部に設けられたジャケット部２と、前記ジャケット部２へ蒸気を供給する供給管１１を有し、前記発泡槽１内の温度を調節する温調制御部１０と、を備え、前記温調制御部１０は、前記ジャケット部２へ供給される蒸気の圧力を一定に保つ第１の減圧弁（減圧弁１２）と、前記第１の減圧弁の下流側から分岐し、蒸気供給量が互いに異なる複数の分岐管１１ａ〜１１ｃと、前記複数の分岐管１１ａ〜１１ｃの少なくとも１つに設けられた第１の制御弁（制御弁１４ｂおよび１４ｃ）と、を備えた製造装置を用いた発泡粒子の製造方法において、前記複数の分岐管１１ａ〜１１ｃの開閉切替を制御するとともに、当該分岐管１１ｂおよび１１ｃでの蒸気量を前記第１の制御弁により調節する。 The method for producing foamed particles according to the fifth aspect of the present invention includes a foaming tank 1, a jacket portion 2 provided on the outer peripheral portion of the foaming tank 1, and a supply pipe 11 for supplying steam to the jacket portion 2. A first pressure reducing valve (1) which includes a temperature control unit 10 for adjusting the temperature in the foam tank 1 and keeps the pressure of steam supplied to the jacket part 2 constant. The pressure reducing valve 12), a plurality of branch pipes 11a to 11c branching from the downstream side of the first pressure reducing valve and having different steam supply amounts, and at least one of the plurality of branch pipes 11a to 11c are provided. In a method for producing foamed particles using a manufacturing apparatus provided with a first control valve (control valves 14b and 14c), the opening / closing switching of the plurality of branch pipes 11a to 11c is controlled, and the branch pipes 11b and the branch pipes 11b and The amount of steam at 11c is adjusted by the first control valve.

本発明の態様６に係る発泡粒子の製造方法は、発泡槽１と、前記発泡槽１の外周部に設けられたジャケット部２と、前記ジャケット部２へ蒸気を供給する供給管１１ｄを有し、前記発泡槽１内の温度を調節する温調制御部１０Ａと、を備え、前記温調制御部１０Ａは、前記供給管１１ｄに設けられ、上流側の蒸気供給源から送られる蒸気の圧力を減圧して、下流側へ送る第２の減圧弁（減圧弁１５）と、前記供給管１１ｄにおける前記第２の減圧弁の下流側に設けられた第２の制御弁と、を備えた製造装置を用いた発泡粒子の製造方法において、前記第２の減圧弁を制御し、前記供給管１１ｄを流れる蒸気の圧力を上昇または降下させるとともに、前記ジャケット部２への蒸気流量を前記第２の制御弁により調節する。 The method for producing foamed particles according to aspect 6 of the present invention includes a foaming tank 1, a jacket portion 2 provided on the outer peripheral portion of the foaming tank 1, and a supply pipe 11d for supplying steam to the jacket portion 2. The temperature control unit 10A for adjusting the temperature in the foam tank 1 is provided, and the temperature control unit 10A is provided in the supply pipe 11d to control the pressure of steam sent from the steam supply source on the upstream side. A manufacturing apparatus including a second pressure reducing valve (pressure reducing valve 15) that reduces pressure and sends it to the downstream side, and a second control valve provided on the downstream side of the second pressure reducing valve in the supply pipe 11d. In the method for producing foamed particles using the above, the second pressure reducing valve is controlled to increase or decrease the pressure of steam flowing through the supply pipe 11d, and the steam flow rate to the jacket portion 2 is controlled by the second control. Adjust with a valve.

１ 発泡槽
２ ジャケット部
１０、１０Ａ 温調制御部
１１、１１ｄ 供給管
１１ａ、１１ｂ、１１ｃ 分岐管
１２ 減圧弁（第１の減圧弁）
１５ 減圧弁（第２の減圧弁）
１３ａ、１３ｂ、１３ｃ、１３ｄ 開閉弁
１４ｂ、１４ｃ 制御弁（第１の制御弁）
１４ｄ 制御弁（第２の制御弁）
２１ 開閉弁切替制御部（切替制御部）
２２ 減圧弁圧力制御部 1 Foam tank 2 Jacket section 10, 10A Temperature control control section 11, 11d Supply pipes 11a, 11b, 11c Branch pipe 12 Pressure reducing valve (first pressure reducing valve)
15 Pressure reducing valve (second pressure reducing valve)
13a, 13b, 13c, 13d On-off valve 14b, 14c Control valve (first control valve)
14d control valve (second control valve)
21 On-off valve switching control unit (switching control unit)
22 Pressure reducing valve pressure control unit

Claims (6)

発泡槽と、
前記発泡槽の外周部に設けられたジャケット部と、
前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、
前記温調制御部は、
前記ジャケット部へ供給される蒸気の圧力を一定に保つ第１の減圧弁と、
前記第１の減圧弁の下流側から分岐し、蒸気供給量が互いに異なる複数の分岐管と、
前記複数の分岐管の開閉切替を制御するための切替制御部と、
前記複数の分岐管の少なくとも１つに設けられ、当該分岐管での蒸気量を調節する第１の制御弁と、を備えた発泡粒子の製造装置。 Foam tank and
A jacket portion provided on the outer peripheral portion of the foam tank and a jacket portion
It has a supply pipe for supplying steam to the jacket portion, and includes a temperature control unit for adjusting the temperature in the foam tank.
The temperature control unit
A first pressure reducing valve that keeps the pressure of steam supplied to the jacket portion constant, and
A plurality of branch pipes branching from the downstream side of the first pressure reducing valve and having different steam supply amounts,
A switching control unit for controlling the opening / closing switching of the plurality of branch pipes,
An apparatus for producing foamed particles, which is provided in at least one of the plurality of branch pipes and includes a first control valve for adjusting the amount of vapor in the branch pipes. 前記複数の分岐管のうち、蒸気供給量が最も大きい分岐管には、前記第１の制御弁が設けられていない、請求項１に記載の発泡粒子の製造装置。 The apparatus for producing foamed particles according to claim 1, wherein the branch pipe having the largest steam supply amount among the plurality of branch pipes is not provided with the first control valve. 前記切替制御部は、蒸気供給量が最も大きい分岐管から蒸気供給量が最も小さい分岐管へ順に、開閉を切替えるように構成されている、請求項１または２に記載の発泡粒子の製造装置。 The foamed particle manufacturing apparatus according to claim 1 or 2, wherein the switching control unit is configured to switch between opening and closing in order from the branch pipe having the largest steam supply amount to the branch pipe having the smallest steam supply amount. 発泡槽と、
前記発泡槽の外周部に設けられたジャケット部と、
前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、
前記温調制御部は、
前記供給管に設けられ、上流側の蒸気供給源から送られる蒸気の圧力を減圧して、下流側へ送る第２の減圧弁と、
前記供給管における前記第２の減圧弁の下流側に設けられ、前記ジャケット部への蒸気流量を調節する第２の制御弁と、
前記第２の減圧弁を制御し、前記供給管を流れる蒸気の圧力を上昇または降下させる減圧弁圧力制御部と、を備えた、発泡粒子の製造装置。 Foam tank and
A jacket portion provided on the outer peripheral portion of the foam tank and a jacket portion
It has a supply pipe for supplying steam to the jacket portion, and includes a temperature control unit for adjusting the temperature in the foam tank.
The temperature control unit
A second pressure reducing valve provided in the supply pipe, which reduces the pressure of steam sent from the steam supply source on the upstream side and sends it to the downstream side.
A second control valve provided on the downstream side of the second pressure reducing valve in the supply pipe and adjusting the steam flow rate to the jacket portion, and
An apparatus for producing foamed particles, comprising a pressure reducing valve pressure control unit that controls the second pressure reducing valve and raises or lowers the pressure of steam flowing through the supply pipe. 発泡槽と、
前記発泡槽の外周部に設けられたジャケット部と、
前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、
前記温調制御部は、
前記ジャケット部へ供給される蒸気の圧力を一定に保つ第１の減圧弁と、
前記第１の減圧弁の下流側から分岐し、蒸気供給量が互いに異なる複数の分岐管と、
前記複数の分岐管の少なくとも１つに設けられた第１の制御弁と、を備えた製造装置を用いた発泡粒子の製造方法において、
前記複数の分岐管の開閉切替を制御するとともに、当該分岐管での蒸気量を前記第１の制御弁により調節する、発泡粒子の製造方法。 Foam tank and
A jacket portion provided on the outer peripheral portion of the foam tank and a jacket portion
It has a supply pipe for supplying steam to the jacket portion, and includes a temperature control unit for adjusting the temperature in the foam tank.
The temperature control unit
A first pressure reducing valve that keeps the pressure of steam supplied to the jacket portion constant, and
A plurality of branch pipes branching from the downstream side of the first pressure reducing valve and having different steam supply amounts,
In a method for producing foamed particles using a production apparatus provided with a first control valve provided in at least one of the plurality of branch pipes.
A method for producing foamed particles, which controls switching between opening and closing of the plurality of branch pipes and adjusts the amount of steam in the branch pipes by the first control valve. 発泡槽と、
前記発泡槽の外周部に設けられたジャケット部と、
前記ジャケット部へ蒸気を供給する供給管を有し、前記発泡槽内の温度を調節する温調制御部と、を備え、
前記温調制御部は、
前記供給管に設けられ、上流側の蒸気供給源から送られる蒸気の圧力を減圧して、下流側へ送る第２の減圧弁と、
前記供給管における前記第２の減圧弁の下流側に設けられた第２の制御弁と、を備えた製造装置を用いた発泡粒子の製造方法において、
前記第２の減圧弁を制御し、前記供給管を流れる蒸気の圧力を上昇または降下させるとともに、前記ジャケット部への蒸気流量を前記第２の制御弁により調節する、発泡粒子の製造方法。 Foam tank and
A jacket portion provided on the outer peripheral portion of the foam tank and a jacket portion
It has a supply pipe for supplying steam to the jacket portion, and includes a temperature control unit for adjusting the temperature in the foam tank.
The temperature control unit
A second pressure reducing valve provided in the supply pipe, which reduces the pressure of steam sent from the steam supply source on the upstream side and sends it to the downstream side.
In a method for producing foamed particles using a production apparatus provided with a second control valve provided on the downstream side of the second pressure reducing valve in the supply pipe.
A method for producing foamed particles, wherein the second pressure reducing valve is controlled to increase or decrease the pressure of steam flowing through the supply pipe, and the steam flow rate to the jacket portion is adjusted by the second control valve.
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