JPS60190328A - Heating method of sheeted blank member for resin sheet molding - Google Patents
Heating method of sheeted blank member for resin sheet moldingInfo
- Publication number
- JPS60190328A JPS60190328A JP4735384A JP4735384A JPS60190328A JP S60190328 A JPS60190328 A JP S60190328A JP 4735384 A JP4735384 A JP 4735384A JP 4735384 A JP4735384 A JP 4735384A JP S60190328 A JPS60190328 A JP S60190328A
- Authority
- JP
- Japan
- Prior art keywords
- heating
- sheet
- heated
- sheeted
- small holes
- 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
Links
Classifications
-
- 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
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/023—Half-products, e.g. films, plates
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、合成樹脂製のシート状素材を真空成形など一
対の成形型を用いて所要の立体形状に成形する前に、こ
のシート状素材を成形可能な温度に加熱軟化する所の樹
脂シート成形品のシート状素材加熱方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for heating a synthetic resin sheet material to a moldable temperature before molding it into a desired three-dimensional shape using a pair of molds such as vacuum forming. The present invention relates to a method of heating a sheet-like material for a resin sheet molded product that is subject to softening.
この種のシート状素材加熱方法として従来から一般的に
採用されている方法には、加熱域においてシート状素材
が加熱により軟化したときに受止め支持盤等に付着して
次の成形域への移行等に支障を生じないようにするため
にこのシート状素材の成形範囲部分を空間に浮かせた状
態で素材の上下方向から摂氏１８０°乃至２２０°に熱
せられた熱風を吹付ける方法、或いは電気ヒーターなど
の放射熱による直接加熱又は輻射熱による間接加熱方法
がある。The conventional method of heating this type of sheet material is that when the sheet material softens due to heating in the heating area, it adheres to the receiving support plate and passes on to the next forming area. In order to avoid problems with the transfer, etc., there is a method of blowing hot air heated to 180° to 220° Celsius from above and below the material while the forming area of the sheet material is suspended in space, or by electricity. There are direct heating methods using radiant heat such as a heater, and indirect heating methods using radiant heat.
しかし、このような従来方法では、何れの場合であって
もシート状素材が加熱軟化することに伴なって次第にシ
ート状素材の中央部が自重による垂れ下がり現象を生じ
、シート状素材の周縁部近くの位置、殊に移送のための
挾持部分近くの位置が薄くなってしまうという欠点があ
った。However, with these conventional methods, as the sheet material is heated and softened, the central part of the sheet material gradually sags due to its own weight, and the material near the periphery of the sheet material gradually sags due to its own weight. The disadvantage is that the position of the holder is thinner, especially in the vicinity of the clamping portion for transfer.
このためシート状素材の厚薄に起因する成形製品の不均
質を免れることは不可能なものであった。中でもシート
状素材の厚さ方向に向けて深く凹凸させ々ければならな
い製品（成形品）にあっては、局部的な薄肉部に破れを
生じ商品としての価値を袂失する成形品も生ずるという
欠点があった。For this reason, it has been impossible to avoid non-uniformity of the molded product due to the thickness of the sheet material. In particular, in the case of products (molded products) that require deep unevenness in the thickness direction of the sheet-like material, some molded products may tear locally in thin-walled areas and lose their value as a product. There were drawbacks.
更にシート状素材に印刷が施されている場合には、この
加熱時における撓みや歪み現象が、製品の不均質さとし
て外観上で直観されるという欠点がある。Furthermore, when printing is applied to a sheet-like material, there is a drawback that the bending and distortion phenomena during heating are visually visible as non-uniformity of the product.
殊に問題となるのは、近年諸商品にバーコード（ポスマ
ークとも呼ばれている）′ｆ、付さなければならなくな
り、このバーコードがシート状素材にプレプリントされ
ている場合において、従来方法のように素材加熱時に撓
みゃ歪みを生すると、バーコードそのものが歪で不鮮明
なものとなり、バーコード本来の機能を果し得なくな−
るという致命的な欠点となる。A particular problem is that in recent years it has become necessary to attach barcodes (also called postmarks) to various products, and when this barcode is preprinted on a sheet-like material, conventional methods cannot be used. If the material is bent or distorted when heated, the barcode itself will become distorted and unclear, and the barcode will no longer be able to perform its original function.
This is a fatal drawback.
氷見ＦＪＡは、かかる従来の欠点を合理的に解消できる
シート状素材加熱方法を提案する点に目的を有するもの
であり、このような目的を達成するために本発明に係る
樹脂シート成形品のシート状素材加熱方法は、合成樹脂
製のシート状素材を移送装置を介して水平面又はほぼ水
平面に沿って加熱域に移送し、この加熱域において、全
面に多数の小孔分有する状態で素材移送経路の上部に配
置した熱盤の下面に前記小孔を通じての吸引により前記
シート状素材を接当保持させてこのシート状素材を熱盤
伝導熱？介して加熱させ、加熱後前記小孔を通じての吹
出しにより加熱軟化したシート状素材を熱盤下面から離
脱落下させると同時に成形域に移行させて成形型によっ
て所要形状に成形するという特徴を有するものであって
、次のような作用効果を期待することができるに至った
のである〇
つまり、シート状素材を加熱するにあたって、該シート
状素材をそれの移送経路の上部に配置させた素材加熱用
熱盤の下面に吸引力にて上昇させて接当保持させた状態
で熱盤伝導熱を介して加熱することによって、加熱軟化
に伴なってシーｙ）状素材の中央部分が自重にて垂れ下
がることを防ぎながら、シート状素材の全面（成形範囲
部分）ｔ−熱盤下面に密接保持させ得てその全面を均一
にかつ熱ロス少なく効率的に加熱することができる。し
かも、シート状素材の下部に熱盤？配置してこの熱盤上
面でシート状素材な接当、支持させた状態で加熱すると
いった方法でも、シート状素材中央部分の垂れ下がり現
象は防止できるが、この方法によれば加熱軟化後のシー
ト状素材を次の成形域に移行させるにあたってのシート
状素材の熱盤支持面からの離脱に際して、加熱された素
材の熱盤支持面への付着力と素材の重力（自重）との和
に相当する以上の上昇離脱力ヲ惨し、離脱に大きなエネ
ルギーを要するばかりでなく、そのような上昇離脱力を
エアーブローで達成する場合、素材の温度低下が大きく
、加熱時にその温度低下分を見込んだ温度にまで加熱昇
温しておく必要もあって、加熱速度及び熱エネルギーの
面でも不利がある。The purpose of Himi FJA is to propose a sheet material heating method that can rationally eliminate such conventional drawbacks, and in order to achieve this purpose, we have developed a sheet of resin sheet molded product according to the present invention. In the method of heating a sheet-like material, a sheet-like material made of synthetic resin is transferred to a heating area along a horizontal plane or a nearly horizontal plane via a transfer device, and in this heating area, a material transfer path is passed through a material having a large number of small holes on the entire surface. The sheet-like material is held in contact with the bottom surface of a heating plate placed on the upper part of the heating plate by suction through the small holes, and the sheet-like material is heated by conductive heat from the heating plate. After heating, the heated and softened sheet material is blown out through the small holes and released from the lower surface of the heating plate, and simultaneously transferred to the forming area where it is formed into the desired shape by the forming die. As a result, we have come to expect the following effects: In other words, when heating a sheet-like material, heat for heating the material is placed above the sheet-like material's transport path. By heating the plate through conduction heat while it is lifted up by suction and held in contact with the bottom surface of the plate, the central part of the material in the form of a seam will sag due to its own weight as it softens due to heating. While preventing this, the entire surface of the sheet-like material (the molding area) can be held closely against the lower surface of the heating plate, and the entire surface can be heated uniformly and efficiently with less heat loss. Moreover, is there a heating plate at the bottom of the sheet material? The sagging phenomenon of the central part of the sheet-like material can also be prevented by placing the sheet-like material in contact with the top surface of the heating plate and heating it while supporting it, but with this method, the sheet-like material after being heated and softened Corresponds to the sum of the adhesion force of the heated material to the heating plate support surface and the gravity (self-weight) of the material when the sheet material is separated from the heating plate support surface when transferring the material to the next forming area. Not only is the above upward detachment force disastrous and requires a large amount of energy to detach, but when such upward detachment force is achieved by air blowing, the temperature of the material decreases significantly, and the temperature that takes into account this temperature decrease when heating is It is also necessary to heat the product to a temperature of 100%, which is disadvantageous in terms of heating speed and thermal energy.
これに対し本発明方法では、シート状素材をそれの移送
経路上部に配置した熱盤下面に吸引力にて接当保持させ
て加熱するので、加熱軟化後のシート状素材に対して極
く僅かな吹出し力を与えるのみで、シート状素材の重力
を活かして確実容品に離脱落下させることが可能である
・従って、加熱時における中央部分の垂れ下がりがなく
、商品価値の高い成形品を得ることができるのはもとよ
り、加熱された素材の成形域への移行を敏速に行ない易
いとともに、加熱能率の上昇及び熱エネルギーの節減を
図り易いといった顕著な効果を期待できるに至ったので
ある。In contrast, in the method of the present invention, the sheet-like material is heated by being held in contact with the bottom surface of the heating plate placed above the transfer path using suction force, so that the sheet-like material after being heated and softened is extremely small. By simply applying a strong blowing force, it is possible to make use of the gravity of the sheet-like material to ensure that the sheet material separates and falls into the container. Therefore, the center part does not sag during heating, and a molded product with high commercial value can be obtained. Not only is it possible to quickly transfer the heated material to the molding area, it is also possible to expect remarkable effects such as increasing heating efficiency and saving thermal energy.
以下本発明方法の実施例を図面に基づいて詳述する。Examples of the method of the present invention will be described in detail below with reference to the drawings.
第１図において、（１）は合成樹脂製のシート状素材で
あって、これはロール状に巻回されて軸α乃に引出し自
在に懸架配置されている。（２）は第２図仮想線で示す
ように前記シート状素材ｆ１＋の幅方向の両端近くを上
下から挾持して該シート状素材（１）を水平面又はほぼ
水平面に沿って移送する装置の一例で、各々上下一対の
エンドレスチェーンからなり、これらチェーンは、シー
ト状素材（１）の戚形長さ単位の移動量毎で間欠的に作
動されるように構成されている。この移送装＠（２）に
よる素材移送経路の上手側から下手側にかけて順次加熱
載置、成、形（加工）域［Ｂｌ、切断（加工）域（Ｃ１
が設けられている。In FIG. 1, (1) is a sheet-like material made of synthetic resin, which is wound into a roll and suspended from an axis α so that it can be freely drawn out. (2) is an example of a device that transfers the sheet-like material (1) along a horizontal plane or a substantially horizontal plane by holding the sheet-like material f1+ near both ends in the width direction from above and below, as shown by the imaginary lines in FIG. Each of the chains is composed of a pair of upper and lower endless chains, and these chains are configured to be operated intermittently every time the sheet-like material (1) moves in linear length units. From the upper side to the lower side of the material transfer path by this transfer device @ (2), heating, mounting, forming, and forming (processing) areas [Bl, cutting (processing) areas (C1)
is provided.
而して、前記加熱載置で前記素材移送経路の上部には電
熱ヒーター（４〜を内蔵した熱器（４１’（ｉ”、その
下面（４ａ）がシート状素材（１）に極近接する状態に
配置されている。この熱器（４）には、前記下面（４ａ
）に臨む状態で多数の小孔（３）が全面に等間隔又はほ
ぼ等間隔で形成されているとともに、これら小孔（３）
群葉電磁切替弁（７）、配管（８）を介してエアーポン
プ（Ｐｌの吸込口及び吐出口に接続されていて、前記切
替弁（７）の切替作動によって前記小孔（３）ヲ通じて
吸引力を作用させる状態と小孔（３）ヲ通じてエアーを
吹出し作用させる状態とに切換可能に構成されている。At the top of the material transfer path during heating and placing, there is a heating device (41'(i") having a built-in electric heater (4) whose lower surface (4a) is very close to the sheet material (1). This heater (4) has the lower surface (4a
) A large number of small holes (3) are formed on the entire surface at equal or almost equal intervals, and these small holes (3)
It is connected to the suction and discharge ports of the air pump (Pl) via a foliage electromagnetic switching valve (7) and piping (8), and the small hole (3) is opened by the switching operation of the switching valve (7). It is configured to be switchable between a state in which a suction force is applied through the small hole (3) and a state in which air is blown out through the small hole (3).
成形域ｆＢ］には、加熱軟化後の素材Ｔ１）の雄型（５
）と雌型（５′ｌとからなる成、彫型が配置され、切断
域ｔａには切断刃（６）と切断受刃（的とから々る切断
装置が配置されている。これらの成形型、切断装置の具
体構成、は、従来−′般のものと変らないので詳細は省
略する。In the molding area fB], a male die (5
) and a female mold (5'l) are arranged, and a cutting blade (6) and a cutting blade (target) are arranged in the cutting area ta. The mold and the specific construction of the cutting device are the same as the conventional ones, so details will be omitted.
図中（９１、＋９１は素材移送用ロール、（１つは成形
品切断後の残余シート部分、 は前記雌型（１／ｌの上
面に形成された成形用凹部を示す。In the figure, (91, +91 are rolls for material transfer, (one is the remaining sheet portion after cutting the molded product, and (1) is the molding recess formed on the upper surface of the female mold (1/l).
次に成、形フローについて簡単に説明すると、シート状
素材＋１）が加熱載置に移送され停止されたとき、ポン
プｆＰ］が作動し、小孔（３）を通じての吸引力により
シート状素材（１）が第３図（イ）の如く熱器（４）の
下面に接当保持されてこの熱器（４）の伝導熱を介して
加熱される。この素材（１）が所要温度にまで加熱軟化
した時点で電磁切替弁（７）が切替作動し、小孔（３）
ヲ通じてのエアー吹出力及び自重によって＠３図（ロ）
の如く加熱軟化したシート状素材（１）が熱盤（４）の
下面から離脱落下される。Next, to briefly explain the formation and shaping flow, when the sheet-like material +1) is transferred to the heated placement and stopped, the pump fP] is activated and the sheet-like material ( 1) is held in contact with the lower surface of a heating device (4) as shown in FIG. 3(A), and is heated through the conduction heat of this heating device (4). When this material (1) is heated and softened to the required temperature, the electromagnetic switching valve (7) is activated to open the small hole (3).
@Figure 3 (B) depending on the air blowing power and own weight through the
The heated and softened sheet-like material (1) is detached from the lower surface of the heating plate (4) and falls.
これと同時又はこれよりもやや前から作動されている移
送装置（２）によってシート状素材（１）が成形域ｔＢ
ｌに移送されて、その移送されてきたシート状素材（１
）を成形型＋５） 、 （ｆｌ’ｌにより所要形状に成
形（真空度、形が一般的である）するのと同時併行的に
、後続するシート状素材（１）部分が前述と同様に加熱
され、かつ前回に成形されて切断域（Ｃ１に移送されて
いるシート状素材（１）部分は切断装置の刃ｆｉｌ 、
＋ｅ’＋によって所定の製品形状に切断される。この
ような工程を順次間欠的に行なうことにより、製品を連
続的に成、形するに至るのである。The sheet material (1) is transferred to the forming area tB by the transfer device (2) which is operated at the same time or a little earlier than this.
The transported sheet material (1
) into the desired shape (the degree of vacuum and shape is general) using the mold +5), (fl'l), and at the same time, the subsequent sheet material (1) is heated in the same way as above. The sheet material (1) portion that has been previously formed and transferred to the cutting area (C1) is the blade of the cutting device.
+e'+ cuts into a predetermined product shape. By performing these steps sequentially and intermittently, products can be continuously formed and shaped.
尚、本発明方法の実施に使用する熱器（４）の構成材料
としては耐熱性で熱酸導性に勝れたものが好ましく、ま
た、加熱源としては電熱ヒーターが最適である。The material for the heating device (4) used in carrying out the method of the present invention is preferably one that is heat resistant and has excellent thermal acid conductivity, and as the heating source, an electric heater is most suitable.
第１図は本発明方法の実施に用いる装置の概略側面図、
第２図は同要部の斜視図、８３図（イ）、（ロ）は加熱
作用状態の要部説明図である。
＋１＋・・・・・・シート状素材、（２）・旧・・移送
装置、（３）・・・・・小孔、（４）・・・・・・熱器
、（５） 、 （的・旧・・成形型、囚・・・・・・加
熱域、田）・・・・・・成形域。FIG. 1 is a schematic side view of an apparatus used for carrying out the method of the present invention;
FIG. 2 is a perspective view of the main part, and FIGS. 83(A) and 83(B) are explanatory views of the main part in a heating action state. +1+... Sheet-like material, (2) Old... Transfer device, (3)... Small hole, (4)... Heater, (5), (Target)・Old...Mold, mold...Heating area, field)...Forming area.
Claims (1)
を介して水平面又はほぼ水平面に沿って加熱域内に移送
し、この加熱域内において、全面に多数の小孔（３）を
有する状態で素材移送経路の上部に配置した熱盤（４）
の下面に前記小孔（３）を通じての吸引により前記シー
ト状素材＋１）を接当保持させてこのシート状素材（１
）ヲ熱盤（４）伝導熱を介して加熱させ、加熱後前記小
孔（３）を通じての吹出しにより加熱軟化したシート状
素材＋１）を熱盤（４）下面から離脱落下させると同時
に成形域＋Ｂｌに移行させて成形型（５）、（的によっ
て所要形状に成形することを特徴とする樹脂シート成形
品のシート状素材加熱方法。 ■ 前記熱盤（４）として、電熱ヒーター（４７０を内
蔵したものを使用する特許請求の範囲第０項に記載の樹
脂シート成形品のシート状素材加熱方法。[Claims] ■ Device (2) for transporting sheet-like material t1+ made of synthetic resin
A heating plate (4) is placed above the material transfer path with a large number of small holes (3) on the entire surface of the heating area.
The sheet material (+1) is held in contact with the lower surface of the sheet material (1) by suction through the small hole (3).
) The heating plate (4) is heated via conductive heat, and after heating, the heated and softened sheet material +1) is released from the lower surface of the heating plate (4) by blowing out through the small holes (3) and falls, and at the same time, the molding area is heated. +Bl, a mold (5), (a method for heating a sheet material for a resin sheet molded product, characterized in that it is molded into a desired shape depending on the target.) As the heating plate (4), an electric heater (470 is built in) A method for heating a sheet-like material for a resin sheet molded product according to claim 0, which uses a method for heating a resin sheet molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4735384A JPS60190328A (en) | 1984-03-12 | 1984-03-12 | Heating method of sheeted blank member for resin sheet molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4735384A JPS60190328A (en) | 1984-03-12 | 1984-03-12 | Heating method of sheeted blank member for resin sheet molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60190328A true JPS60190328A (en) | 1985-09-27 |
| JPS6362381B2 JPS6362381B2 (en) | 1988-12-02 |
Family
ID=12772774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4735384A Granted JPS60190328A (en) | 1984-03-12 | 1984-03-12 | Heating method of sheeted blank member for resin sheet molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60190328A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0271078A2 (en) * | 1986-12-11 | 1988-06-15 | Idemitsu Petrochemical Company Limited | Thermoforming method and apparatus for thermoplastic resin sheet |
| US9333696B2 (en) | 2010-06-03 | 2016-05-10 | Cryovac, Inc. | Plate and apparatus for forming a plastic material flanged hollow article |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56135810U (en) * | 1980-03-14 | 1981-10-15 |
-
1984
- 1984-03-12 JP JP4735384A patent/JPS60190328A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56135810U (en) * | 1980-03-14 | 1981-10-15 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0271078A2 (en) * | 1986-12-11 | 1988-06-15 | Idemitsu Petrochemical Company Limited | Thermoforming method and apparatus for thermoplastic resin sheet |
| US9333696B2 (en) | 2010-06-03 | 2016-05-10 | Cryovac, Inc. | Plate and apparatus for forming a plastic material flanged hollow article |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6362381B2 (en) | 1988-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |