JPS6261415B2 - - Google Patents
Info
- Publication number
- JPS6261415B2 JPS6261415B2 JP54085324A JP8532479A JPS6261415B2 JP S6261415 B2 JPS6261415 B2 JP S6261415B2 JP 54085324 A JP54085324 A JP 54085324A JP 8532479 A JP8532479 A JP 8532479A JP S6261415 B2 JPS6261415 B2 JP S6261415B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- heating
- cooling
- molded
- opened
- 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
- 238000010438 heat treatment Methods 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000005187 foaming Methods 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000047 product Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は、加熱専用金型において蒸気等の加熱
媒体により、金型内部に充填された予備発泡粒子
を、発泡、融着させた後、加熱専用金型を開き内
部の成形体を取り出し冷却専用金型に挿入し、冷
却する成形方法において、加熱専用金型を段階的
に開け、かつ加熱専用金型を１〜50mmの範囲内
で、１回又は複数回段階的に開ける過程で該加熱
専用金型の固定側、移動側または両側より成形体
表面に空気等の流体を吹きつけることを特徴とす
る熱可塑性樹脂発泡体の製造方法を内容とする。Detailed Description of the Invention The present invention involves foaming and fusing pre-expanded particles filled inside the mold using a heating medium such as steam in a heating-only mold, and then opening the heating-only mold to expose the inside of the mold. In a molding method in which a molded body is taken out, inserted into a cooling mold, and cooled, the heating mold is opened in stages, and the heating mold is opened once or multiple times within a range of 1 to 50 mm. The method of producing a thermoplastic resin foam is characterized by blowing a fluid such as air onto the surface of the molded product from the fixed side, moving side, or both sides of the heating-only mold during the opening process.
すでにこの種の成形方法に関しては特開昭52−
90578によつて知られており、その成形に必要と
なる熱エネルギー削減効果は非常に大きいものが
ある。しかし、厚肉の成形体や形状の非常に複数
な成形体を成形する場合、加熱専用金型を開いた
時の成形体の膨張量、変形量が大きくなり、冷却
専用金型に該成形体を挿入する際、その形状を損
なうことがある。この問題に対しては、従来加熱
条件を下げ膨張量、変形量を小さくする事で外観
良好な成形体を得る事は出来るが、一方で融着が
やや悪くなる。また別の対策として、加熱専用金
型を閉じた状態で成形体内圧の低下を待つて型開
きする事も可能であるが、サイクルタイムが非常
に長くかかるため実用的ではない。 This type of molding method has already been published in Japanese Patent Application Laid-Open No. 1973-
90578, and has a very large effect in reducing the thermal energy required for molding. However, when molding a thick-walled molded object or a molded object with a large number of shapes, the amount of expansion and deformation of the molded object when the heating-only mold is opened becomes large, and the molded object is placed in a cooling-only mold. When inserting, the shape may be damaged. To solve this problem, conventionally, by lowering the heating conditions and reducing the amount of expansion and deformation, it is possible to obtain a molded product with a good appearance, but on the other hand, the fusion bond becomes somewhat poor. As another measure, it is possible to close the heating-only mold and wait for the pressure inside the molded body to decrease before opening the mold, but this is not practical because the cycle time would be extremely long.
本発明は、この問題を加熱専用金型を１〜50mm
の範囲内で、１回又は複数回段階的に開く事によ
り、成形体の膨張及び変形をコントロールし工業
的に有利な解決を可能とするものである。 The present invention solves this problem by using a heating-only mold of 1 to 50 mm.
The expansion and deformation of the molded body can be controlled by opening the molded body stepwise once or multiple times within the range of 200 to 2000, thereby making it possible to achieve an industrially advantageous solution.
本発明にいう予備発泡粒子とは、予備発泡され
た発泡可能な熱可塑性樹脂であつて、本発明の目
的に適用し得るものであれば種類を問わない。例
えばポリスチレン樹脂、ポリエチレン樹脂その他
各種単一重合樹脂、共重合樹脂、グラフト重合樹
脂、またはそれらのブレンド樹脂であつて、予備
発泡され更に発泡可能な粒子状物を言う。 The pre-expanded particles referred to in the present invention are pre-expanded foamable thermoplastic resins, and any type may be used as long as they are applicable to the purpose of the present invention. For example, it refers to a particulate material of polystyrene resin, polyethylene resin, various other homopolymer resins, copolymer resins, graft polymer resins, or blend resins thereof, which can be pre-foamed and further foamed.
本発明に用いる加熱専用金型は、金型キヤビテ
イーに充填された予備発泡粒子を、発泡、融着さ
せ、製造すべき最終成形物にほぼ対応する形状の
成形物（例えば、半製品とも称される）を得るこ
とが目的である。従つて、発泡、融着という目的
を達し得るならば、金型温度等には特に制限はな
いが、好ましくは75〜140℃、更に好ましくは80
〜130℃、最も好ましくは90〜130℃である。 The heating-only mold used in the present invention foams and fuses the pre-expanded particles filled in the mold cavity to form a molded product (for example, also called a semi-finished product) that has a shape approximately corresponding to the final molded product to be manufactured. The purpose is to obtain Therefore, as long as the purpose of foaming and fusion can be achieved, there are no particular restrictions on the mold temperature, but it is preferably 75 to 140°C, more preferably 80°C.
~130°C, most preferably 90-130°C.
冷却専用金型は、前記加熱専用金型より取り出
された半製品を最終成形物とするために冷却、整
形するためのものである。従つて、この目的を達
し得るならば金型温度等に特に制限はないが、好
ましくは90℃以下である。 The cooling-only mold is used to cool and shape the semi-finished product taken out from the heating-only mold into a final molded product. Therefore, there is no particular restriction on the mold temperature etc. as long as this purpose can be achieved, but it is preferably 90°C or less.
次に、図面に従い更に詳しく説明する。 Next, a more detailed explanation will be given with reference to the drawings.
第１図に示したのは従来の成形プロセスの１例
である。の状態で加熱専用金型の固定型１と移
動型２とが閉鎖し、予備発泡粒子を充填した後、
蒸気により加熱し、予備発泡粒子を融着させた後
加熱専用金型を開きの状態になる。この時、成
形体３は自由に膨張し変形する。次に、の状態
で加熱専用金型の移動型２が冷却専用金型の固定
型４に成形体３を移すために移動する。そして成
形体３は冷却専用金型の固定型４に残り、加熱専
用金型の移動型２は元の位置にもどる。次にで
示すように加熱、冷却専用金型の移動型２，５は
前進し加熱専用金型は閉じると再び充填、加熱に
入り、一方冷却専用金型は閉じると内部の成形体
３を冷却する。このプロセスにおいて、の状態
で成形体３の膨張、変形が非常に大きくなる場合
にはの工程で冷却専用金型の固定側４の先端部
で成形体を破損させることが起り得る。第２図に
示したのが本発明の１実施態様のプロセスであ
り、加熱専用金型１，２を１度に開けるのではな
く、′に示す様に、例えば１〜50mm程度、加熱
専用金型１，２を開いた状態で加熱専用金型の移
動型２の後退を一時停止し、一定時間その状態を
保持し、成形体の膨張を金型開閉方向にのみ行な
わさせ、その後′′の工程で成形体３を冷却専
用金型の固定型４に移すもので、挿入の際、成形
体３を傷つけることはない。更に、この′の状
態において金型より空気等の流体を成形体表面に
吹き付ける事により、成形体の表面層を冷却し、
膨張を制御しやすくする事ができる。また流体を
吹きつける事により、′の状態に保持する時間
を短縮する効果もある。本発明にいう流体とは、
成形体の表面層を冷却するものであれば良いが、
気体が最も良好に使用される。 FIG. 1 shows an example of a conventional molding process. In this state, fixed mold 1 and movable mold 2 of the heating mold are closed, and after filling with pre-expanded particles,
After heating with steam and fusing the pre-expanded particles, the heating mold is opened. At this time, the molded body 3 freely expands and deforms. Next, in the state shown in FIG. 3, the movable mold 2, which is a heating-only mold, moves to transfer the molded body 3 to the fixed mold 4, which is a cooling-only mold. The molded body 3 then remains in the fixed mold 4, which is a cooling-only mold, and the movable mold 2, which is a heating-only mold, returns to its original position. As shown below, the movable molds 2 and 5 of the heating and cooling mold move forward, and the heating mold closes and starts filling and heating again, while the cooling mold cools the molded body 3 inside when it is closed. do. In this process, if the expansion and deformation of the molded body 3 becomes extremely large in the state of , the molded body may be damaged at the tip of the fixed side 4 of the cooling mold in the step of . The process of one embodiment of the present invention is shown in Figure 2. Instead of opening the heating molds 1 and 2 at once, as shown in With the molds 1 and 2 open, the retraction of the movable mold 2 of the heating-only mold is temporarily stopped, and this state is maintained for a certain period of time to allow the molded product to expand only in the mold opening/closing direction. In the process, the molded body 3 is transferred to a fixed mold 4 which is a cooling-only mold, and the molded body 3 is not damaged during insertion. Furthermore, in this state, the surface layer of the molded product is cooled by blowing a fluid such as air onto the surface of the molded product from the mold.
Expansion can be easily controlled. Also, spraying the fluid has the effect of shortening the time required to maintain the state ''. The fluid referred to in the present invention is
It is fine as long as it cools the surface layer of the molded object, but
Gases are best used.
気体の内でも空気が最良である。何故なら、安
価かつ取扱いが容易であり成形体を乾燥状態に保
持し得ることによる。尚、流体の温度は、成形体
温度より低いことが好ましい。流体が空気である
場合には室温の雰囲気を利用することで目的が達
し得る。 Among gases, air is the best. This is because it is inexpensive, easy to handle, and can keep the molded body dry. Note that the temperature of the fluid is preferably lower than the temperature of the molded article. When the fluid is air, the purpose can be achieved by using a room temperature atmosphere.
上記の説明においては、′の工程を１段階設
ける場合について述べたが、成形体の寸法形状に
よつて段数を増す方が膨張、変形を制御しやすい
場合もある。また、加熱専用金型１，２の開き
量、保持時間、更に流体の量については成形体の
寸法形状により、それぞれ決定すれば良い。 In the above description, a case has been described in which the step ' is provided in one stage, but expansion and deformation may be easier to control depending on the size and shape of the molded article by increasing the number of stages. Further, the opening amount of the heating molds 1 and 2, the holding time, and the amount of fluid may be determined depending on the size and shape of the molded body.
第１図は、従来法の、、、の順序によ
る成形プロセスの１例の説明図、第２図は、
′、′、′の順序による本発明の成形プロセ
スの１例の説明図である。
１……加熱専用金型の固定型、２……加熱専用
金型の移動型、３……発泡成形体、４……冷却専
用金型の固定型、５……冷却専用金型の移動型。
Fig. 1 is an explanatory diagram of an example of a conventional molding process in the order of .
FIG. 2 is an explanatory diagram of an example of the molding process of the present invention according to the order of ',','. 1... Fixed type of mold for heating only, 2... Movable type of mold for heating only, 3... Foamed molded product, 4... Fixed type of mold for cooling only, 5... Movable type of mold for cooling only .
Claims (1)
り、金型内部に充填された予備発泡粒子を、発
泡、融着させた後、加熱専用金型を開き内部の成
形体を取り出し冷却専用金型に挿入し、冷却する
成形方法において、加熱専用金型を段階的に開
け、かつ加熱専用金型を１〜50mmの範囲内で、１
回又は複数回段階的に開ける過程で該加熱専用金
型の固定側、移動側または両側より成形体表面に
空気等の流体を吹きつけることを特徴とする熱可
塑性樹脂発泡体の製造方法。1 After foaming and fusing the pre-expanded particles filled inside the mold using a heating medium such as steam in a heating-only mold, the heating-only mold is opened and the molded object inside is taken out and placed in a cooling-only mold. In the molding method of inserting and cooling, the heating-only mold is opened in stages, and the heating-only mold is opened once within the range of 1 to 50 mm.
A method for producing a thermoplastic resin foam, which comprises blowing a fluid such as air onto the surface of the molded product from a fixed side, a movable side, or both sides of the heating-only mold during the stepwise opening process one or more times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8532479A JPS5610433A (en) | 1979-07-05 | 1979-07-05 | Manufacture of thermoplastic resin foamed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8532479A JPS5610433A (en) | 1979-07-05 | 1979-07-05 | Manufacture of thermoplastic resin foamed body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5610433A JPS5610433A (en) | 1981-02-02 |
| JPS6261415B2 true JPS6261415B2 (en) | 1987-12-21 |
Family
ID=13855436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8532479A Granted JPS5610433A (en) | 1979-07-05 | 1979-07-05 | Manufacture of thermoplastic resin foamed body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5610433A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62282806A (en) * | 1986-05-21 | 1987-12-08 | フォ−チュナ・ヴェルケ・マシネンファブリ−ク・ゲ−エムベ−ハ− | Spindle for machine tool |
| JPH045309U (en) * | 1990-04-27 | 1992-01-17 |
-
1979
- 1979-07-05 JP JP8532479A patent/JPS5610433A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62282806A (en) * | 1986-05-21 | 1987-12-08 | フォ−チュナ・ヴェルケ・マシネンファブリ−ク・ゲ−エムベ−ハ− | Spindle for machine tool |
| JPH045309U (en) * | 1990-04-27 | 1992-01-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5610433A (en) | 1981-02-02 |
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