JPS62240530A - Method of annealing bath finishing for synthetic resin product - Google Patents

Method of annealing bath finishing for synthetic resin product

Info

Publication number
JPS62240530A
JPS62240530A JP8327586A JP8327586A JPS62240530A JP S62240530 A JPS62240530 A JP S62240530A JP 8327586 A JP8327586 A JP 8327586A JP 8327586 A JP8327586 A JP 8327586A JP S62240530 A JPS62240530 A JP S62240530A
Authority
JP
Japan
Prior art keywords
product
tank
bath
annealing
synthetic resin
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.)
Granted
Application number
JP8327586A
Other languages
Japanese (ja)
Other versions
JPH0362140B2 (en
Inventor
Hikoshi Mizukoshi
水越 彦士
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DOUSHI KAGAKU KOGYOSHO KK
Original Assignee
DOUSHI KAGAKU KOGYOSHO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DOUSHI KAGAKU KOGYOSHO KK filed Critical DOUSHI KAGAKU KOGYOSHO KK
Priority to JP8327586A priority Critical patent/JPS62240530A/en
Publication of JPS62240530A publication Critical patent/JPS62240530A/en
Publication of JPH0362140B2 publication Critical patent/JPH0362140B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02Thermal after-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02Thermal after-treatment
    • B29C2071/022Annealing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02Thermal after-treatment
    • B29C2071/025Quenching, i.e. rapid cooling of an object

Abstract

PURPOSE:To improve the water absorption percentage of a product and prevent the sweating from occurring by a method wherein the synthetic resin product is warmed and moistened in an annealing bath and the interior of the bath is quenched in the state that the bath is blocked in order to lower the temperature of the product. CONSTITUTION:The water absorption percentage of a product is enhanced at maximum and becomes optimum percentage when the product is warmed up to 80 deg.C or higher and moistended to 90% or more in an annealing bath and, after that, the temperature in the bath is quenched down to 60-40 deg.C. The quenching of the interior of the annealing bath is performed by circulating cooling water at the lower part of the interior of the annealing bath and at the same time agitating the air in the bath with a fan so as to uniformize the interior of the tank and at the same time to gradually vanish steam. At this time, the whole interior of the tank is cooled in the state that the door of the bath is not released but blocked throughout the cooling of the interior of the bath.

Description

【発明の詳細な説明】[Detailed description of the invention]

〔産業上の利用分野〕 本発明は、合成樹脂製品のアニール槽仕上げ方法に関す
る。 (従来の技術〕 従来、プラスチックファスナーなどの車部品や弱1!機
器部品等の合成樹脂製品に吸水させて弾性等を付与する
アニール槽仕上げは次のような手段がとられていた。 ■ポリ容器に入れた合成樹脂製品をアニール槽へ搬入し
、アニール槽内の温度を90℃、湿度を90〜100%
に調整し、6時間位静置して加温加湿する。 この高温多湿環境で製品に吸水させ、その後7二−ル槽
のドアを開いて合成樹脂製品を搬出し仕上げる。 ■前記■方法の加温加湿後、3時間位静置して自然冷却
し、7二−ル槽から合成樹脂製品を搬出する。 ■アニール槽の検温を80℃に、湿度をBoz〜9oz
に設定して、合成樹脂製品を搬入し、8〜24時間の長
時間加温加湿して、ファンを回しながらドアを開けて製
品を搬出する■なお、アニール槽を使用しない湯槽浸漬
法もある。 湯槽浸漬法は、湯槽に浸漬したのち、引き上げて遠心分
#機で脱水し仕上げる 〔解決しようとする問題点〕 前記、従来方法には1次のような問題点がある。 前記■方法では、アニール槽のドアを開くので内部の蒸
気が瞬時に外部に出てしまう。 そのため製品表面および表面層が乾燥し、吸水率が下が
る。 又1品温が高いと露結現象が生じる。 前記■方法および■方法では、仕上がり時間を要するし
、吸水率が下がる。 比較的高温の製品を、蒸気の充満する槽内に放置すると
、露結するという問題点もある。 前記■方法では、湯槽浸漬の吊り下げ作業や脱水のため
の作業があり1作業経済性に問題があった・ 〔問題点を解決するための手段〕 本発明は1合成樹脂製品のアニール槽仕上げにおいて吸
水率を向上させ、露結現象を防止する仕上げ方法を提供
するものであって、合成樹脂製品をアニール槽内で所定
温度(軟化点直下)で所定時間加温加湿したのち、閉塞
したままの槽内を急冷して品温を低下させることにより
、製品吸水率をあげることを特徴とするアニール槽仕上
げ方法である。 アニール槽の加温は80℃以上、加湿90%以上急冷し
た槽内温度が60℃〜40℃で行なうとその吸水率は最
も向上し最適である。 アニール槽内の急冷は、槽内を均一にかつ蒸気が除々に
消えるように、アニール槽内部下方に冷水を環流させて
かつファンで槽内空気を攪拌することにより行なわれる
。 アニール槽内をドアを解放することなく閉塞したままで
槽内金体を冷却することが特徴的である。 〔試験例〕 本発明は1合成樹脂製品(プラスチック成型品、ナイロ
ンファスナー等)の7ニーリングの徐冷を従来の1製品
のみの冷却1ではなく「製品および湿度環境の急冷1を
行なうことにより、吸水率を向上させかつ露結現象を防
止したのである。 吸水率の向上は、次の試験例によって確認された。 第2図は合成樹脂製品を入れて、加温加湿するガス加熱
実験装置であり、露結現象をみるために透明蓋を採用し
ている。 第2図(1)は1本発明方法で行なうために。 下方に水を流入排出する換水装置を設けている。 念のため、上方に散水装置を設けた。 第2図(2)は、透明蓋を急に開けて製品を取出す方法
を行なうためであり、前記従来方法■に相当するもので
ある。 80分間のガス加熱後、第2図(1)では、蓋を閉めた
まま冷却水を導入し湿度40〜50%まで下げ1品温5
0℃以下にした。 第2図(2)では、加熱後蓋を開けて室温(作業場内の
温度)で冷却した。 合成樹脂製品は、ポリアミド製品(商標;東し アミラ
ンCM 1017)である。 7二−ル前の製品1ケの平均重量は、0.88555g
であり、アニール後のft量から水分を割出した。 その結果は1次表1のような製品重量の差異が認められ
、第2図(1)の方法による吸水率は、約5.37%、
第2図(2)の方法による吸水率は約3.85%であっ
た。 つまり第2図(1)の方法によれば(2)の方法の約 
1.4倍の吸水率の増加が認められた。 又、透明蓋から露結現象を観察したところ、急に蓋を解
放したものは急な温度差のため露結現象がおこり、その
露の排除処理を行なう必要があった。 急に蓋を開けると吸水率が低くなるのは、加温加湿中は
製品の分子間が開いた状態でそこに水分が入っているが
、蓋を開けたとたん中の水分までが外部の空気圧との関
係で放出されるためと推測される。 これに対し外部の空気圧に影響されない(1)の方法は
、その放出が比較的少なくでき水分が製品中に固定され
る。 冷却する温度湿度により吸水率が相違しており、冷却程
度に臨界的意義が推測できる。 表1 〔実施例〕 前記試験例により吸水率の向上を確認し、実際にダウン
フロー型アニール槽lの底部構造を改良して、導水パイ
プ2と排水パイプ3を設けて、アニール槽内部の底@4
に水5が環流するように構成した。 又アニール槽l内には、ファン6を設けて温湿度の均一
化を図った。 アニール槽内の温度と湿度を低下させる1段としては環
流水5のほかに、冷風などを送ったり、冷凍パイプを設
けることも可能性がある。 しかし、温度と湿度のなめらかな減少のためには、アニ
ール槽内部の底に流れる水を通すのが最も吸水率が安定
している。
[Industrial Application Field] The present invention relates to an annealing tank finishing method for synthetic resin products. (Conventional technology) Conventionally, the following methods have been used to finish synthetic resin products such as plastic fasteners and other car parts and weak 1! equipment parts using an annealing bath that absorbs water and imparts elasticity. Transport the synthetic resin product in the container to the annealing tank, and set the temperature in the annealing tank to 90°C and the humidity to 90-100%.
Adjust to the desired temperature and leave it in place for 6 hours to heat and humidify. The product is allowed to absorb water in this high-temperature, high-humidity environment, and then the door of the 7-well tank is opened and the synthetic resin product is carried out and finished. (2) After heating and humidifying in the method (2) above, the synthetic resin product is left to stand for 3 hours to allow natural cooling, and the synthetic resin product is taken out from the 7-well tank. ■The temperature of the annealing tank is 80℃, and the humidity is Boz ~ 9oz.
Synthetic resin products are brought in, heated and humidified for a long period of 8 to 24 hours, and then the door is opened while the fan is running and the products are transported out. ■There is also a hot water bath immersion method that does not use an annealing tank. . In the hot water bath immersion method, the material is immersed in a hot water bath, then pulled up and dehydrated using a centrifugal separator.[Problems to be Solved] The above-mentioned conventional method has the following problems. In method (2), the door of the annealing tank is opened, so the steam inside instantly escapes to the outside. As a result, the product surface and surface layer become dry and the water absorption rate decreases. Also, if the temperature of one item is high, dew condensation occurs. Methods (1) and (2) require time for finishing and reduce water absorption. There is also the problem that dew condensation occurs when relatively high temperature products are left in a tank filled with steam. The above-mentioned method (2) involves work for hanging the product by immersing it in a hot water tank and for dewatering, and there is a problem in the economical efficiency of the work. This method provides a finishing method that improves water absorption and prevents dew condensation in an annealing tank. After heating and humidifying a synthetic resin product at a predetermined temperature (just below the softening point) for a predetermined period of time in an annealing tank, the product is left closed. This is an annealing tank finishing method characterized by increasing the water absorption rate of the product by rapidly cooling the inside of the tank to lower the product temperature. If the annealing tank is heated at 80° C. or higher, and the temperature inside the tank is 60° C. to 40° C. after being rapidly cooled with 90% or more humidification, the water absorption rate is most improved and optimal. The inside of the annealing tank is rapidly cooled by circulating cold water downward inside the annealing tank and stirring the air inside the tank with a fan so that the inside of the tank is uniform and the steam gradually disappears. It is characteristic that the metal bodies inside the annealing tank are cooled while the tank remains closed without opening the door. [Test Example] The present invention performs seven-knealing slow cooling of one synthetic resin product (plastic molded product, nylon fastener, etc.) by performing rapid cooling of the product and humidity environment (1) instead of the conventional cooling (1) of only one product. This improved water absorption and prevented dew condensation. The improvement in water absorption was confirmed by the following test example. Figure 2 shows a gas heating experimental device that heats and humidifies synthetic resin products. In order to observe the dew condensation phenomenon, a transparent lid is used. Figure 2 (1) is used to carry out the method of the present invention. A water exchange device is provided below to allow water to flow in and discharge. Just in case. , a water sprinkler was installed above. Fig. 2 (2) shows a method in which the transparent lid is suddenly opened to take out the product, and corresponds to the conventional method ① above. Gas heating for 80 minutes. After that, in Figure 2 (1), cooling water was introduced with the lid closed to lower the humidity to 40-50% and the temperature of each item was 5.
The temperature was below 0°C. In FIG. 2 (2), after heating, the lid was opened and the product was cooled to room temperature (temperature in the workplace). The synthetic resin product is a polyamide product (trademark: Toshi Amiran CM 1017). The average weight of one product before 7 rolls is 0.88555g
The water content was determined from the ft amount after annealing. The results showed differences in product weight as shown in Table 1, and the water absorption rate according to the method shown in Figure 2 (1) was approximately 5.37%.
The water absorption rate obtained by the method shown in FIG. 2 (2) was about 3.85%. In other words, according to the method shown in Figure 2 (1), approximately
An increase in water absorption rate of 1.4 times was observed. Furthermore, when we observed dew condensation through the transparent lid, we found that when the lid was suddenly opened, dew condensation occurred due to the sudden temperature difference, and it was necessary to remove the dew. The reason why the water absorption rate decreases when the lid is suddenly opened is because during heating and humidification, the molecules of the product are open and moisture enters there, but as soon as the lid is opened, even the moisture inside is absorbed by the external air pressure. It is presumed that this is because it is released in relation to On the other hand, method (1), which is not affected by external air pressure, releases relatively little moisture and fixes the moisture in the product. The water absorption rate differs depending on the temperature and humidity of cooling, and it can be assumed that the degree of cooling has a critical significance. Table 1 [Example] The improvement in water absorption rate was confirmed through the above test example, and the bottom structure of the down-flow type annealing tank l was actually improved, and a water guide pipe 2 and a drainage pipe 3 were installed to improve the bottom inside the annealing tank. @4
The structure was such that water 5 was refluxed into the tank. In addition, a fan 6 was provided in the annealing tank 1 to equalize temperature and humidity. As a first step to lower the temperature and humidity inside the annealing tank, in addition to circulating water 5, it is also possible to send cold air or provide a freezing pipe. However, in order to smoothly reduce the temperature and humidity, the most stable water absorption rate is to allow water to flow through the bottom of the annealing tank.

【実施例1】 機  器;ダウンフロー型アニール槽 製  品、 88 N= [1,8ナイロシ成形品 (
図中A)加熱時間;3時間30分 温  度;90℃=品温 湿    度 ; 90〜100 % 冷却方法:水道水 3時間30分経過後、アニール槽の 底部に水を流して槽内を湿度40〜 50%以下で品温を50℃にした。 その結果次表2のように 1に土工1】 を達成した。 因みに前記従来方法■〜■では、 2.5〜3%の吸水率が限界であっ た。 表2
[Example 1] Equipment: down-flow type annealing tank product, 88 N = [1,8 nylon molded product (
A) Heating time in the figure: 3 hours 30 minutes Temperature: 90°C = Product temperature and humidity: 90-100% Cooling method: Tap water After 3 hours and 30 minutes, water was poured into the bottom of the annealing tank to cool the inside of the tank. The product temperature was kept at 50°C with humidity below 40-50%. As a result, as shown in Table 2 below, earthworks of 1] were achieved. Incidentally, in the conventional methods ① to ②, a water absorption rate of 2.5 to 3% was the limit. Table 2

【実施例2】 製品;8N=8ナイロン(素材と吸水性が68Nより良
い;図中8)を使用し、前記実施例1と同じ方法で実施
した。 その結果次表3のように 「収率 44% °  した。 因みに前記従来方法■〜■では2,5〜3%の吸水率が
限界であった。 表3 〔効 果〕 本発明は、合成樹脂製品のアニール槽仕上げ方法におい
て、高温高湿の槽内を、閉塞状態のままで低温低湿化し
て製品の吸水率を高めるものであるので、次のような特
有な効果がある。 ■露結現象が生じない。 そのため脱水処理等が不要であり、仕上げ後そのまま袋
詰め作業ができる。 ■吸水率が向上したので品質が顕著に優れたものとなっ
た。 結晶化度も高い。 ■槽内での冷却であるので、製品の出し入れや余分な手
間がかからない。 ■アニール槽の底部の改良で充分に本発明方法が実施で
きるので、既存設備をそのまま利用できる。 ()5製品に直接に散水するのではないので徐冷効果(
=内部歪のなめらかな除去)にも支障がなく、外形を変
する蓋然性も低い。 このように、本発明方法は、アニーリング作業の問題点
であった吸水率の向上とA結現象の防止を達成したもの
でありきわめてすぐれた技術的価値がある。
[Example 2] Product: 8N = 8 nylon (material and water absorbency are better than 68N; 8 in the figure) was used, and the same method as in Example 1 was carried out. As a result, as shown in Table 3 below, the yield was 44%. Incidentally, the water absorption rate of 2.5 to 3% was the limit in the conventional methods ① to ②. In the annealing tank finishing method for resin products, the high-temperature, high-humidity tank remains closed and lowered in temperature and humidity to increase the water absorption rate of the product, so it has the following unique effects: ■ Dew condensation This phenomenon does not occur.Therefore, there is no need for dehydration treatment, and the product can be packed into bags as is after finishing. ■The water absorption rate has improved, resulting in significantly superior quality.The degree of crystallinity is also high. ■Inside the tank Since the cooling is carried out in the tank, there is no need to take in and out the product or extra effort. ■The method of the present invention can be fully implemented by improving the bottom of the annealing tank, so the existing equipment can be used as is. (5) Water is directly applied to the product. Because it is not a slow cooling effect (
= smooth removal of internal distortion), and the probability of changing the external shape is low. As described above, the method of the present invention achieves improvement in water absorption and prevention of the A-setting phenomenon, which were problems in the annealing process, and has extremely excellent technical value.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、本発明方法の一実施例を示す工程図である。 第2図は、本発明方法の効果性を試験するためのガス加
熱実験装置であり、(1)が本発明方法を試験した装置
の正面図、(2)が従来方法の試験装置の正面図である
。 符号の簡単な説明
FIG. 1 is a process diagram showing an embodiment of the method of the present invention. Figure 2 shows a gas heating experimental device for testing the effectiveness of the method of the present invention, (1) is a front view of the device used to test the method of the present invention, and (2) is a front view of the test device for the conventional method. It is. Simple explanation of the symbols

Claims (3)

【特許請求の範囲】[Claims] (1)合成樹脂製品をアニール槽内で加温加湿したのち
、閉塞したままの槽内を冷却して品 温と湿度を低下させることにより製品吸水 率をあげることを特徴とする合成樹脂製品 のアニール槽仕上げ方法。
(1) A synthetic resin product that is characterized by heating and humidifying the synthetic resin product in an annealing tank and then cooling the closed tank to lower the product temperature and humidity, thereby increasing the water absorption rate of the product. Annealing tank finishing method.
(2)前記加温加湿が、90℃・30%以上、急冷した
槽内温度が60℃〜40℃である特許請求の範囲第1項
記載の合成樹脂製品のアニール 槽仕上げ方法。
(2) The method for finishing a synthetic resin product in an annealing tank according to claim 1, wherein the heating and humidification is performed at 90°C and 30% or more, and the temperature inside the tank during rapid cooling is 60°C to 40°C.
(3)前記アニール槽内を急冷する手段が、槽内下部へ
冷却水を導入排出する構成である特 許請求の範囲第1項および第2項記載の合 成樹脂製品のアニール槽仕上げ方法。
(3) The method for finishing an annealing tank for synthetic resin products according to claims 1 and 2, wherein the means for rapidly cooling the inside of the annealing tank is configured to introduce and discharge cooling water into a lower part of the tank.
JP8327586A 1986-04-11 1986-04-11 Method of annealing bath finishing for synthetic resin product Granted JPS62240530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8327586A JPS62240530A (en) 1986-04-11 1986-04-11 Method of annealing bath finishing for synthetic resin product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8327586A JPS62240530A (en) 1986-04-11 1986-04-11 Method of annealing bath finishing for synthetic resin product

Publications (2)

Publication Number Publication Date
JPS62240530A true JPS62240530A (en) 1987-10-21
JPH0362140B2 JPH0362140B2 (en) 1991-09-25

Family

ID=13797803

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8327586A Granted JPS62240530A (en) 1986-04-11 1986-04-11 Method of annealing bath finishing for synthetic resin product

Country Status (1)

Country Link
JP (1) JPS62240530A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011027218A (en) * 2009-07-28 2011-02-10 Toyota Motor Corp Method of manufacturing pressure vessel and pressure vessel
CN109795141A (en) * 2019-03-07 2019-05-24 苏州德弗朗空气控制技术有限公司 A kind of automated ultrasonic nylon blade damping machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011027218A (en) * 2009-07-28 2011-02-10 Toyota Motor Corp Method of manufacturing pressure vessel and pressure vessel
CN109795141A (en) * 2019-03-07 2019-05-24 苏州德弗朗空气控制技术有限公司 A kind of automated ultrasonic nylon blade damping machine

Also Published As

Publication number Publication date
JPH0362140B2 (en) 1991-09-25

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