JPS6038257B2 - Method for manufacturing a plastic vacuum-formed product having partially thickened parts or reinforcing ribs - Google Patents
Method for manufacturing a plastic vacuum-formed product having partially thickened parts or reinforcing ribsInfo
- Publication number
- JPS6038257B2 JPS6038257B2 JP22053482A JP22053482A JPS6038257B2 JP S6038257 B2 JPS6038257 B2 JP S6038257B2 JP 22053482 A JP22053482 A JP 22053482A JP 22053482 A JP22053482 A JP 22053482A JP S6038257 B2 JPS6038257 B2 JP S6038257B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- vacuum
- partial
- reinforcing ribs
- forming
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
- B29C70/887—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced locally reinforced, e.g. by fillers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、真空成形で部分的厚肉部や補強リブを有する
プラスチック製品を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing plastic products having partially thickened parts and reinforcing ribs by vacuum forming.
従来、部分的に板陣が厚い製品を熱可塑性樹脂の真空成
形により成形する場合にはプラグアシスト又はシートを
ブローして真空成形を行っているが、製品の極部的な箇
所の板厚が薄くなってしまい、その対策に苦慮している
。Conventionally, when molding products with partially thick sheets using thermoplastic resin vacuum forming, vacuum forming is performed using plug assist or sheet blowing. It has become thinner and I am struggling to find a way to deal with it.
また製品の裏面に補強リブをつけることは不可能であり
、これらの点が射出成形品と比べた場合の真空成形品の
大きな欠点となっている。Furthermore, it is impossible to attach reinforcing ribs to the back surface of the product, and these points are major drawbacks of vacuum-formed products compared to injection-molded products.
本発明は斯る現況に鑑みて発明されたものであり、部分
的厚肉部や裏面に補強リブを有するプラスチック製品を
真空成形方法で成形できる様にすることを目的とするも
のである。The present invention was devised in view of the current situation, and an object of the present invention is to enable molding of plastic products having reinforcing ribs on partially thick portions or on the back surface using a vacuum forming method.
斯る目的を達成するための本発明の構成は、型面側を製
品の表面とする真空成形において、加熱された成形用シ
ートの所要の部分、即ち板厚を厚くしたり補強リブを設
ける箇所上に、別途加熱された適宜大きさの部分的シー
トを載せ、その部分を部分的上型で加圧して真空成形す
るものである。The structure of the present invention to achieve such an object is that in vacuum forming where the mold side is the surface of the product, the required parts of the heated forming sheet, that is, the parts where the plate thickness is increased or reinforcing ribs are provided. A separately heated partial sheet of an appropriate size is placed on top, and the portion is vacuum-formed by pressurizing it with a partial upper mold.
以下、本発明の−実施例を図に基づいて説明する。Hereinafter, embodiments of the present invention will be described based on the drawings.
図面は本発明方法の工程を示す模式図で、図面によれば
本発明を実施するための装置は、従来の真空成形の装置
に部分的上型１が付加されている。The drawings are schematic diagrams showing the steps of the method of the present invention. According to the drawings, the apparatus for carrying out the present invention is a conventional vacuum forming apparatus with a partial upper mold 1 added.
而して、先ず成形用の熱可塑性樹脂シート２を真空成形
適性温度までヒーター３で加熱する（第１図）と共にこ
のシート２の所定の個所、即ち製品Ａにしたとき肉厚を
厚くしたり、補強リブ４を設けようとする個所に相当す
る部分の上に、別の加熱したシート（以下、部分シート
５という）が重ねられる。First, a thermoplastic resin sheet 2 for molding is heated with a heater 3 to a temperature suitable for vacuum molding (Fig. 1), and at the same time, when forming a predetermined part of this sheet 2, that is, a product A, the thickness is increased. Another heated sheet (hereinafter referred to as partial sheet 5) is placed over the portion corresponding to the location where the reinforcing rib 4 is to be provided.
部分シート５は成形用のシート２と同材質の熱可塑性樹
脂のシートであり、予め必要な大きさと厚さに形成され
ており、別の場所において加熱台６上でヒーター７によ
り成形適性温度まで加熱した後、シート２の所定の個所
上に載せられる。The partial sheet 5 is a thermoplastic resin sheet made of the same material as the sheet 2 for molding, and is formed in advance to the required size and thickness, and is heated to the appropriate temperature for molding by a heater 7 on a heating table 6 in another location. After heating, it is placed on a predetermined location on the sheet 2.
（第２図）上記、成形用シート２の加熱及びこのシート
２への部分シート５の戦層は、真空成形型８上で行って
もよいし、別の場所で行い、然る後にシート２を真空成
形型８の上に移動させるようにしてもよいが、前者の場
合、ヒーター３は次の工程の邪魔にならないようにシー
ト加熱後、真空成形型８上から移動させることが必要で
あり、後者の場合、シ−ト２及び部分シート５が真空成
形適性温度以下に冷却しないうちにシート２を真空成形
型８の上に移動させることが必要となる。(Fig. 2) The heating of the forming sheet 2 and the layering of the partial sheet 5 onto this sheet 2 may be performed on the vacuum forming mold 8 or at another location, and then the sheet 2 However, in the former case, it is necessary to move the heater 3 from above the vacuum forming mold 8 after heating the sheet so that it does not interfere with the next process. In the latter case, it is necessary to move the sheet 2 onto the vacuum forming mold 8 before the sheet 2 and the partial sheet 5 have cooled down to a temperature suitable for vacuum forming.
次に真空成形型８をシリンダー９により上昇させて真空
成形を行い、同時に部分的上型１をシリンダーＩＱで下
降させて成形用シート２上の部分シート５を加圧する。Next, the vacuum forming mold 8 is raised by the cylinder 9 to perform vacuum forming, and at the same time the partial upper mold 1 is lowered by the cylinder IQ to pressurize the partial sheet 5 on the molding sheet 2.
（第３図）真空成形型８は、製品Ａの表面形状に対応す
る成形面を有しており、図示例においては成形面の１箇
所に凹所１１が設けられている。(FIG. 3) The vacuum forming die 8 has a forming surface corresponding to the surface shape of the product A, and in the illustrated example, a recess 11 is provided at one location on the forming surface.
部分的上型１は真空成形型８の凹所１１に対応して該部
に必要な間隙を存して鼓合する雄型状に形成されて、そ
の下面には補強リプ成形用スリット１２が設けられてい
る。The partial upper mold 1 is formed into a male shape that corresponds to the recess 11 of the vacuum forming mold 8 with a necessary gap therebetween, and has a reinforcing lip molding slit 12 on its lower surface. It is provided.
そして、この部分的上型１は真空成形型８の凹所１１の
真上に配置され、真空成形時、凹所１１内に下降鉄合し
、成形用シート２上に載せられた部分シート５を加圧す
る。This partial upper mold 1 is placed directly above the recess 11 of the vacuum forming mold 8, and is lowered into the recess 11 during vacuum forming, and the partial sheet 5 placed on the molding sheet 2 Pressurize.
即ち、上記部分シート５は、成形用のシート２の真空成
形型８の凹所１１に吸引被着される部分に載せられてお
り、部分的上型１の加圧により、部分シート５を構成す
る樹脂が上記部分的上型１と真空成形型８の凹所１１内
面との間に回り込み、同時に部分的上型１の補強リブ成
形用スリット１２内にも流入充填され、この状態で部分
シート５と成形用のシート２は一体に熔着する。That is, the partial sheet 5 is placed on the portion of the molding sheet 2 that is suction-adhered to the recess 11 of the vacuum mold 8, and the partial sheet 5 is formed by applying pressure from the partial upper mold 1. The resin flows around between the partial upper mold 1 and the inner surface of the recess 11 of the vacuum forming mold 8, and at the same time flows into and fills the reinforcing rib forming slits 12 of the partial upper mold 1, and in this state, the partial sheet is formed. 5 and the molding sheet 2 are welded together.
而して、両シート２，５の冷却後、真空成形型８の真空
吸引を停止すると共に部分的上型１を上昇させて脇型す
れば製品Ａを得ることができ、真空成形型８の凹所１
１に対応していた成形用シート２の部分は製品Ａにおい
て表面側に突出する部分１４として形成され、該部分１
４は従来の真空成形では板厚が薄くなる所であるにもか
かわらず、他の部分と同じかもしくはそれ以上の内厚に
成形され、裏面には補強リブ１５も一体に形成される。
（第４図）尚、真空成形型８の成形面に紋模様を付け、
製品Ａ表面に紋模様を表わすことも任意にできる。After cooling both sheets 2 and 5, the vacuum suction of the vacuum forming mold 8 is stopped, and the partial upper mold 1 is raised and side molding is performed to obtain the product A. recess 1
The part of the molding sheet 2 that corresponded to 1 is formed as a part 14 protruding toward the surface side of product A, and the part 1
Although the thickness of the plate 4 is thinner in conventional vacuum forming, it is formed to have an inner thickness equal to or greater than that of other parts, and reinforcing ribs 15 are also integrally formed on the back surface.
(Fig. 4) In addition, a pattern is added to the molding surface of the vacuum mold 8,
It is also possible to optionally display a pattern on the surface of product A.
図中１６は成形用のシート２を挟んで固定及び移動させ
るためのツメである。本発明は以上の様に構成したから
、真空成形品の板厚を部分的に厚くしたり、裏側に補強
リプを設けることを真空成形の工程時同時に行うことが
できる。Reference numeral 16 in the figure indicates a claw for fixing and moving the molding sheet 2 by sandwiching it therebetween. Since the present invention is constructed as described above, it is possible to partially increase the thickness of the vacuum-formed product and provide a reinforcing lip on the back side at the same time during the vacuum-forming process.
従って、従来の真空成形では避けることができなかった
極部的な箇所が薄くなる問題を解決し、全体が均一な板
厚の製品を得ることが容易にできる。Therefore, it is possible to solve the problem of thinning in extremely localized areas, which could not be avoided in conventional vacuum forming, and to easily obtain a product with uniform thickness throughout.
また、板厚を武分的に厚くしても製品の裏側に肉を盛る
ので、製品表面側の見栄えを悪くすることがない。Furthermore, even if the thickness of the plate is increased considerably, since the meat is built up on the back side of the product, the appearance of the front side of the product will not be deteriorated.
依って所期の目的を達成し得る。Therefore, the intended purpose can be achieved.
図面は本発明の工程を模式的に示すもので、第１図は成
形用のシートの加熱工程、第２図は成形用シートの上に
部分シートを戴ける工程、第３図は真空成形の工程、第
４図は脱型工程を示す。
１・・・・・・部分的上型、２…・・・成形用シート、
５・・・・・・部分シート、８・・・・・・真空成形型
。
第１図第２図
第３図
第４図The drawings schematically show the process of the present invention. Figure 1 shows the process of heating a sheet for forming, Figure 2 shows the process of placing a partial sheet on the sheet for forming, and Figure 3 shows the process of vacuum forming. , FIG. 4 shows the demolding process. 1... Partial upper mold, 2... Molding sheet,
5... Partial sheet, 8... Vacuum forming mold. Figure 1 Figure 2 Figure 3 Figure 4
Claims (1)
適性温度に加熱した成形用シートの所要箇所に、別の場
所で成形適性温度に加熱した所要の大きさと厚さを有す
る部分シートを載せ、その部分を部分的上型で加圧する
と同時に真空成形し、２枚のシートを熔着して一体に成
形することを特徴とする部分的厚肉又は補強リブを有す
るプラスチツク真空成形品の製造方法。1. In vacuum forming with the mold side as the surface of the product, a partial sheet having the required size and thickness that has been heated to the appropriate forming temperature at a different location is placed on the required location of the forming sheet that has been heated to the appropriate forming temperature. Production of a plastic vacuum-formed product having a partial thick wall or reinforcing ribs, characterized in that the part is pressurized with a partial upper mold and vacuum-formed at the same time, and the two sheets are welded and molded into one piece. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22053482A JPS6038257B2 (en) | 1982-12-15 | 1982-12-15 | Method for manufacturing a plastic vacuum-formed product having partially thickened parts or reinforcing ribs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22053482A JPS6038257B2 (en) | 1982-12-15 | 1982-12-15 | Method for manufacturing a plastic vacuum-formed product having partially thickened parts or reinforcing ribs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59109313A JPS59109313A (en) | 1984-06-25 |
| JPS6038257B2 true JPS6038257B2 (en) | 1985-08-30 |
Family
ID=16752499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22053482A Expired JPS6038257B2 (en) | 1982-12-15 | 1982-12-15 | Method for manufacturing a plastic vacuum-formed product having partially thickened parts or reinforcing ribs |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6038257B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6053058B2 (en) | 2015-02-12 | 2016-12-27 | トヨタ紡織株式会社 | Manufacturing method of undercover for vehicle |
-
1982
- 1982-12-15 JP JP22053482A patent/JPS6038257B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59109313A (en) | 1984-06-25 |
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