JPH0137258B2 - - Google Patents
Info
- Publication number
- JPH0137258B2 JPH0137258B2 JP55176288A JP17628880A JPH0137258B2 JP H0137258 B2 JPH0137258 B2 JP H0137258B2 JP 55176288 A JP55176288 A JP 55176288A JP 17628880 A JP17628880 A JP 17628880A JP H0137258 B2 JPH0137258 B2 JP H0137258B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- mold
- steam
- molding
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
- B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3415—Heating or cooling
- B29C44/3426—Heating by introducing steam in the mould
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Molding Of Porous Articles (AREA)
Description
【発明の詳細な説明】
本発明は発泡成形における廃熱利用方法及びそ
の装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for utilizing waste heat in foam molding.
従来、発泡成形において加熱操作で出る蒸気ド
レン及び低温化した蒸気と冷却操作で出る熱廃水
は廃棄するか又は排水ピツトへ回収して最高50℃
以下の温水として金型の冷却に利用されている。 Conventionally, in foam molding, the steam drain and low-temperature steam produced during heating operations and the thermal wastewater produced during cooling operations are either disposed of or collected into a drainage pit and kept at a maximum temperature of 50°C.
The following hot water is used to cool molds.
本発明者らは、更に効率よく廃熱利用すべく検
討を重ねた結果、本願発明に到達したものであ
る。すなわち加熱操作で出る蒸気ドレン及び低温
化した蒸気と冷却操作で出る熱廃水を70〜80℃以
上の熱水と他の熱廃水へ分離することにより、70
〜80℃以上の熱水は回収して金型の予熱及び成形
用装置で使用する圧縮空気の予熱に再利用するこ
とにより従来、加熱操作前の金型温度は50〜60℃
であつたが、蒸気を使わずしてこれを70℃以上へ
上げることが出来るようになり、かつ、成形時の
加熱操作での使用蒸気量の大巾な節減を達成する
ことが出来た。 The present inventors have arrived at the present invention as a result of repeated studies to utilize waste heat more efficiently. In other words, by separating the steam drain and low-temperature steam generated from heating operations and the thermal waste water generated from cooling operations into hot water of 70 to 80°C or higher and other thermal waste water,
The hot water above ~80℃ is recovered and reused to preheat the mold and the compressed air used in the molding equipment. Conventionally, the mold temperature before the heating operation was reduced to 50~60℃.
However, it became possible to raise the temperature to 70°C or higher without using steam, and it was also possible to achieve a significant reduction in the amount of steam used in the heating operation during molding.
即ち本発明は、1.発泡性熱可塑性樹脂粒子の成
形時に発生する熱廃水を分別し、それを金型へ供
給して金型を予熱し、成形に使用する方法におい
て、熱水の温度が70℃以上であり、かつ熱水の金
型蒸気室への供給を圧縮空気の圧力によつて行う
ことを特徴とする発泡成形の蒸気節減法。2.発泡
性熱可塑性樹脂の成形装置において、熱水回収管
２０、熱水供給管１４及び弁を介して熱水回収タ
ンク２３内に連結された熱水圧送用圧縮空気管３
０を有する熱水回収タンク２３を設け、前記熱水
回収管２０及び熱水供給管１４は弁を介して金型
蒸気室５及び６に連結されていることを特徴とす
る発泡性熱可塑性樹脂の蒸気節減用成形装置を内
容とする。 That is, the present invention provides 1. A method in which hot waste water generated during molding of expandable thermoplastic resin particles is separated, supplied to a mold to preheat the mold, and used for molding. A steam-saving method for foam molding characterized by having a temperature of 70°C or higher and supplying hot water to the mold steam chamber using compressed air pressure. 2. In a foamable thermoplastic resin molding device, a compressed air pipe 3 for pressurizing hot water is connected to a hot water recovery tank 23 via a hot water recovery pipe 20, a hot water supply pipe 14, and a valve.
0, and the hot water recovery pipe 20 and the hot water supply pipe 14 are connected to the mold steam chambers 5 and 6 via valves. The contents include steam-saving forming equipment.
金型予熱のため上記熱水の金型蒸気室への供給
は圧縮空気の圧力によつて行われるのがよく、熱
水の温度は70〜80℃以上が好ましい。 The hot water is preferably supplied to the mold steam chamber for preheating the mold by the pressure of compressed air, and the temperature of the hot water is preferably 70 to 80°C or higher.
以下、本願の実施態様である第１図の例に基づ
き本発明を更に具体的に説明する。 Hereinafter, the present invention will be explained in more detail based on the example shown in FIG. 1, which is an embodiment of the present application.
加熱操作で出る蒸気ドレン及び低温化蒸気は弁
１７は閉、弁１８は開の状態で熱水タンク２３へ
回収される。次に水冷時の排水は以下のように回
収される。すなわち熱水タンク中の温度調節計２
５により70℃以上の排水は弁１７は閉、弁１８は
開の状態で熱水タンク２３へ回収される。 Steam drain and low-temperature steam discharged from the heating operation are collected into the hot water tank 23 with valve 17 closed and valve 18 open. Next, the wastewater from water cooling is collected as follows. In other words, temperature controller 2 in the hot water tank
5, wastewater with a temperature of 70°C or higher is collected into the hot water tank 23 with the valve 17 closed and the valve 18 open.
又、70℃以下の排水は弁１７は開、弁１８は閉
の状態で管１９を通つて排水ラインへ出る。以上
の様にしてタンク２３へ回収された熱水は次の方
法で金型予熱へ使用される。すなわちタンク２３
の熱水は成形用装置で加熱・冷却及び成形品の離
型が終了した後弁１１，１３，１８，２２を閉、
弁１２，２１を開の状態で圧縮空気をタンク２３
へ供給し、空気圧により熱水は配管１４，１０を
通つて成形装置の金型蒸気室５，６へ供給され
る。そして、熱水による金型予熱が終了すると弁
１２，２１を閉、弁２２を開の状態でタンク内圧
力を大気圧へ戻す。この熱水による金型予熱は、
往復動装置２による金型の型開、型閉待ち、型閉
と平行して充填器２９により、キヤビテイ７に発
泡性熱可塑性樹脂粒子を充填する直前まで実施す
る事が出来る。 Further, the waste water at a temperature of 70° C. or lower is discharged to the waste water line through the pipe 19 with the valve 17 open and the valve 18 closed. The hot water collected into the tank 23 as described above is used for preheating the mold in the following manner. That is, tank 23
After the hot water is heated and cooled in the molding device and the molded product is released from the mold, the valves 11, 13, 18, and 22 are closed.
With the valves 12 and 21 open, compressed air is supplied to the tank 23.
The hot water is supplied by air pressure to the mold steam chambers 5, 6 of the molding apparatus through the pipes 14, 10. When the mold preheating with hot water is completed, the valves 12 and 21 are closed, and the tank internal pressure is returned to atmospheric pressure with the valve 22 open. This mold preheating with hot water is
The reciprocating device 2 can open the mold, wait for the mold to close, and in parallel with the mold closing, the filling device 29 can perform the process up to just before filling the cavity 7 with expandable thermoplastic resin particles.
又、圧縮空気は、タンク２３内の熱交換器２４
で予熱され、キヤビテイ７への発泡性熱可塑性樹
脂粒子を充填する工程及び弁１３を通つて金型内
の残留水分を排水する工程更には成型品の離型の
際に使用するので、従来の常温の空気使用による
加熱操作前の金型温度低下を極めて有効に防止出
来る。 Further, the compressed air is passed through a heat exchanger 24 in the tank 23.
The process of filling the cavity 7 with expandable thermoplastic resin particles, the process of draining the residual moisture in the mold through the valve 13, and the process of releasing the molded product, are performed using the conventional method. It is possible to extremely effectively prevent the mold temperature from decreasing before the heating operation due to the use of room temperature air.
実施例
発泡自動成形機SC−10B（東洋機械金属株式会
社製）を使用し、魚箱（510mm×294mm×85mm）２
ケ取り金型に於て、55倍に予備発泡したポリスチ
レン発泡ビーズを使用して成形する場合に、従来
の成形法では５Kg前後の蒸気を必要とした。この
場合次シヨツトの加熱前金型温度は50℃前後であ
つた。次に80℃の熱水予熱を加熱操作前に実施す
ると蒸気使用量は3.5Kgと著しく減少した。なお
この場合の加熱操作前の金型温度は75℃前後であ
つた。Example Using an automatic foam molding machine SC-10B (manufactured by Toyo Kikai Kinzoku Co., Ltd.), two fish boxes (510 mm x 294 mm x 85 mm) were prepared.
When molding polystyrene foam beads that have been pre-expanded to 55 times in a mold, the conventional molding method requires approximately 5 kg of steam. In this case, the mold temperature before heating the next shot was around 50°C. Next, when hot water was preheated to 80℃ before the heating operation, the amount of steam used was significantly reduced to 3.5Kg. In this case, the mold temperature before the heating operation was around 75°C.
以上の結果より本発明による金型予熱方法が蒸
気量の節減に特に有効な事が確認出来た。 From the above results, it was confirmed that the mold preheating method according to the present invention is particularly effective in reducing the amount of steam.
図１は本発明方法の実施に使用する発泡成形用
装置の縦断面図である。
１−１……固定フレーム、１−２……移動フレ
ーム、２……１−２に連繋した往復動装置、３…
…固定金型、４……移動金型、５，６……蒸気
室、８，９……蒸気管、１０……冷水及び熱水放
出管、１４……熱水供給管、１５……圧縮空気送
入管、１６，１９……排水管、２０……熱水回収
管、２３……熱水回収タンク、２４……圧縮空気
の予熱用熱交換器、２５……温度指示調節計、２
６……レベル計、２７……圧力計、２８……安全
弁、２９……樹脂充填器、３０……圧縮空気バイ
パス管、……蒸気、……冷却水、……圧縮
空気。
FIG. 1 is a longitudinal cross-sectional view of a foam molding apparatus used to carry out the method of the present invention. 1-1... Fixed frame, 1-2... Moving frame, 2... Reciprocating device linked to 1-2, 3...
... Fixed mold, 4 ... Movable mold, 5, 6 ... Steam room, 8, 9 ... Steam pipe, 10 ... Cold water and hot water discharge pipe, 14 ... Hot water supply pipe, 15 ... Compression Air supply pipe, 16, 19... Drain pipe, 20... Hot water recovery pipe, 23... Hot water recovery tank, 24... Heat exchanger for preheating compressed air, 25... Temperature indicating controller, 2
6...Level gauge, 27...Pressure gauge, 28...Safety valve, 29...Resin filler, 30...Compressed air bypass pipe,...Steam,...Cooling water,...Compressed air.
Claims (1)
熱廃水を分別し、それを金型へ供給して金型を予
熱し、成形に使用する方法において、熱水の温度
が70℃以上であり、かつ熱水の金型蒸気室への供
給を圧縮空気の圧力によつて行うことを特徴とす
る発泡成形の蒸気節減法。 ２ 発泡性熱可塑性樹脂の成形装置において、熱
水回収管２０、熱水供給管１４及び弁を介して熱
水回収タンク２３内に連結された熱水圧送用圧縮
空気管３０を有する熱水回収タンク２３を設け、
前記熱水回収管２０及び熱水供給管１４は、弁を
介して金型蒸気室５及び又は６に連結されている
ことを特徴とする発泡性熱可塑性樹脂の蒸気節減
用成形装置。[Claims] 1. A method in which hot waste water generated during molding of expandable thermoplastic resin particles is separated, supplied to a mold to preheat the mold, and used for molding, in which the temperature of the hot water is A steam-saving method for foam molding characterized by having a temperature of 70°C or higher and supplying hot water to the mold steam chamber using compressed air pressure. 2. In a molding device for foamable thermoplastic resin, a hot water recovery system includes a hot water recovery pipe 20, a hot water supply pipe 14, and a compressed air pipe 30 for pressurizing hot water connected to a hot water recovery tank 23 via a valve. A tank 23 is provided,
The hot water recovery pipe 20 and the hot water supply pipe 14 are connected to a mold steam chamber 5 and/or 6 via a valve, a molding apparatus for saving steam of a foamable thermoplastic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55176288A JPS57100036A (en) | 1980-12-12 | 1980-12-12 | Method and apparatus for vapor economizing in foamed molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55176288A JPS57100036A (en) | 1980-12-12 | 1980-12-12 | Method and apparatus for vapor economizing in foamed molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57100036A JPS57100036A (en) | 1982-06-22 |
| JPH0137258B2 true JPH0137258B2 (en) | 1989-08-04 |
Family
ID=16010959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55176288A Granted JPS57100036A (en) | 1980-12-12 | 1980-12-12 | Method and apparatus for vapor economizing in foamed molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57100036A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5660228A (en) * | 1979-10-23 | 1981-05-25 | Toyo Kikai Kinzoku Kk | Heating method for mold in foam molding machine |
-
1980
- 1980-12-12 JP JP55176288A patent/JPS57100036A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57100036A (en) | 1982-06-22 |
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