JPH0512138B2 - - Google Patents
Info
- Publication number
- JPH0512138B2 JPH0512138B2 JP58168956A JP16895683A JPH0512138B2 JP H0512138 B2 JPH0512138 B2 JP H0512138B2 JP 58168956 A JP58168956 A JP 58168956A JP 16895683 A JP16895683 A JP 16895683A JP H0512138 B2 JPH0512138 B2 JP H0512138B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- vacuum forming
- vacuum
- molded product
- forming mold
- 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 - Lifetime
Links
- 238000007666 vacuum forming Methods 0.000 claims description 46
- 238000000465 moulding Methods 0.000 claims description 15
- 239000000047 product Substances 0.000 description 32
- 238000000034 method Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005187 foaming Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- B29C44/58—Moulds
- B29C44/582—Moulds for making undercut articles
-
- 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
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
- B29C44/146—Shaping the lining before foaming
-
- 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
- B29C51/10—Forming by pressure difference, e.g. vacuum
-
- 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
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
- B29C51/34—Moulds for undercut articles
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は深しぼり部またはアンダーカツト部を
有する成形品を真空成形する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for vacuum forming a molded article having a deep draw portion or an undercut portion.
（従来技術の説明）
車両または家具用座席もしくは車両用ドアート
リム、ヘツドレストレイント、アームレスト等に
は、軟質塩化ビニル樹脂等の熱可塑性合成樹脂シ
ートからなるシート状被加工材を真空成形法によ
り所定形状とした成形品が表皮材として使用され
ている。真空成形法は、第１図に示すごとくシー
ト状被加工材１を加熱装置２により所定温度に加
熱して軟化させ、その軟化したシート状被加工材
１を、真空成形型３の成形面に吸引密着し、その
状態でシート状被加工材を冷却して硬化させ、真
空成形３の成形面形状に固定する成形方法であ
る。(Description of Prior Art) For vehicle or furniture seats, vehicle door trims, headrest restraints, armrests, etc., sheet-like workpieces made of thermoplastic synthetic resin sheets such as soft vinyl chloride resin are formed by vacuum forming. The molded product is used as the skin material. In the vacuum forming method, as shown in FIG. 1, a sheet-like workpiece 1 is heated to a predetermined temperature by a heating device 2 to soften it, and the softened sheet-like workpiece 1 is placed on the molding surface of a vacuum forming mold 3. This is a forming method in which the sheet-like workpiece is brought into close contact with suction, and in that state, the sheet-like workpiece is cooled and hardened, and fixed to the shape of the forming surface of the vacuum forming 3.
しかし、従来の真空成形法によつて深しぼり部
を有する成形品を成形しようとすれば、深しぼり
部、例えば３ａ，３ｂにおいてシート状被加工材
が局部的に伸ばされるため成形品の厚みが不均一
となり易く、また部分的に薄くなることは避けら
れなかつた。この薄肉化は成形品内部に配設する
クツシヨン材等の色が成形品を通して透けて見え
たり、成形品に梨地模様等が付与されていた場合
には梨地が消える現象、あるいは薄肉化により使
用中に破れるおそれがある等の好ましくない現象
を生じることとなる。 However, when attempting to mold a molded product with deep drawdowns using the conventional vacuum forming method, the sheet-like workpiece is locally stretched at the deep drawdowns, such as 3a and 3b, resulting in a decrease in the thickness of the molded product. It tends to become non-uniform, and it is inevitable that it becomes thinner in some areas. This thinning can be caused by the color of the cushion material placed inside the molded product being visible through the molded product, the satin pattern disappearing if the molded product has a satin pattern, etc., or by thinning during use. This may cause undesirable phenomena such as the risk of tearing.
そこで従来、真空成形品の形状は深しぼり部が
存在しない起伏の少ない平凡なものに限定される
傾向にあつた。なお一部深しぼりまたはアンダー
カツトを有する真空成形品もあるが、第２図のご
とく該成形品１′を真空成形型３′にセツトした状
態で合成樹脂発泡体生成原料４を成形品内面に注
入し、クツシヨン材を成形品内部に形成する場
合、成形品がアンダーカツト部１′ａを有するた
め脱型不可能となり、別の分割可能な発泡型にセ
ツトしなおしてから注入発泡しなければならない
等、技術的、工数的にも多くの問題を引き起こし
ていた。 Therefore, conventionally, the shape of vacuum-formed products has tended to be limited to ordinary shapes with few undulations and no deep drawing parts. Some vacuum-formed products have deep drawings or undercuts, but as shown in Fig. 2, the synthetic resin foam forming raw material 4 is applied to the inner surface of the molded product while the molded product 1' is set in the vacuum mold 3'. When injecting and forming cushioning material inside the molded product, the molded product has an undercut portion 1'a and cannot be removed from the mold, and must be re-set in another divisible foaming mold before injecting and foaming. This caused many problems in terms of technology and man-hours.
（発明が解決しようとする課題）
本発明は深しぼり部またはアンダーカツト部を
有する真空成形品の成形に際して、該深しぼり部
が薄肉とならず、かつその真空成形品とクツシヨ
ン材とが一体となつた製品の製造に際しても、製
品の脱型を可能にする成形品の成形方法の提供を
目的とする。(Problems to be Solved by the Invention) When molding a vacuum-formed product having a deep drawing part or an undercut part, the deep drawing part does not become thin, and the vacuum-formed part and the cushion material are integrally formed. The purpose of the present invention is to provide a molding method for molded products that enables demolding of products even when manufacturing aged products.
（課題を解決しようとする手段）
本発明は、シート状被加工材を深しぼり部また
はアンダーカツト部を有する成形品に真空成形す
る際に際して、前記成形品の成形型を互いに分離
合体可能な第一真空成形型と第二真空成形型によ
つて構成するとともに、まず前記第一真空成形型
を前記第二真空成形型より分離して該第一真空成
形型によつて、深しぼり部またはアンダーカツト
部を含む部分を成形し、次いで、前記第一真空成
形型に前記第二真空成形型を合体して、他の部分
を一体に成形するものである。(Means for Solving the Problems) When vacuum forming a sheet-like workpiece into a molded product having a deep draw portion or an undercut portion, the present invention provides a method for separating and combining the molds of the molded product with each other. The first vacuum forming mold is first separated from the second vacuum forming mold, and the first vacuum forming mold is used to form a deep drawing part or under. The part including the cut portion is molded, and then the second vacuum mold is combined with the first vacuum mold to integrally mold the other parts.
（実施例）
以下本発明の一実施例の成形工程を示す第３図
ないし第５図を用いて本発明を具体的に説明す
る。(Example) The present invention will be specifically described below using FIGS. 3 to 5 showing the molding process of an example of the present invention.
(1) シート状被加工材の加熱工程（第３図）
軟質塩化ビニル樹脂等の熱可塑性合成樹脂から
なるシート状被加工材５を電熱ヒーター等の加熱
装置６により所定温度に加熱し軟化させる。な
お、７は第一真空成形型である。(1) Heating process of sheet-shaped workpiece (Figure 3) A sheet-shaped workpiece 5 made of thermoplastic synthetic resin such as soft vinyl chloride resin is heated to a predetermined temperature with a heating device 6 such as an electric heater to soften it. . In addition, 7 is a first vacuum forming mold.
(2) 深しぼり部の真空成形工程（第４図）
前記軟化状態のシート状被加工材５を、第二真
空成形型８から分離した第一真空成形型７により
真空成形し、深しぼり部５ａおよびその周辺を成
形する。第一真空成形型７は真空成形型の一部で
あり、深しぼり部を主として真空成形する部分で
ある。(2) Vacuum forming process of deep drawing part (Fig. 4) The sheet-like workpiece material 5 in the softened state is vacuum formed by the first vacuum forming mold 7 separated from the second vacuum forming mold 8, and the deep drawing part is formed by vacuum forming. 5a and its surroundings are molded. The first vacuum forming mold 7 is a part of the vacuum forming mold, and is a part that mainly performs vacuum forming of the deep drawing part.
(3) 深しぼり部に隣接する部分の真空成形工程
（第５図）
第一真空成形型７と合体した第二真空成形型８
により、深しぼり部５ａと隣接する部分５ｂを真
空成形し、深しぼり部を有する成形品５′を得る。
なお、この真空成形時において、必要に応じて５
ｂ部分が再度加熱される。第一真空成形型７と第
二真空成形型８とは深しぼり部において分離合体
可能とされ、第一真空成形型７と第二真空成形型
８とは合体して一つの真空成形型９を構成する。(3) Vacuum forming process of the part adjacent to the deep drawing part (Fig. 5) Second vacuum forming mold 8 combined with first vacuum forming mold 7
In this manner, the portion 5b adjacent to the deep draw portion 5a is vacuum formed to obtain a molded product 5' having a deep draw portion.
In addition, during this vacuum forming, 5
Part b is heated again. The first vacuum forming mold 7 and the second vacuum forming mold 8 can be separated and combined at the deep drawing part, and the first vacuum forming mold 7 and the second vacuum forming mold 8 are combined to form one vacuum forming mold 9. Configure.
このようにして形成した成形品５′の内部にク
ツシヨン材を形成するには、第６図のごとく成形
品５′を真空成形型９内にセツトした状態で、成
形品５′内側にポリウレタンフオーム原料等のク
ツシヨン材生成原料１０ａを注入し、上蓋１１に
より第７図のごとく閉型してクツシヨン材１０を
形成する。以上のごとく製造した成形品とクツシ
ヨン材とが一体となつた製品は、第８図のごとく
深しぼり部より第一真空成形型７と第二真空成形
型８とを分離することにより容易に脱型すること
ができる。 To form a cushion material inside the molded product 5' thus formed, the molded product 5' is set in the vacuum mold 9 as shown in FIG. A cushioning material forming raw material 10a such as a raw material is injected and the mold is closed with an upper lid 11 as shown in FIG. 7 to form a cushioning material 10. The product in which the molded product and cushion material manufactured as described above are integrated can be easily removed by separating the first vacuum forming mold 7 and the second vacuum forming mold 8 from the deep drawing part as shown in Fig. 8. Can be molded.
第９図および第１０図は、従来の成形法におい
てはアンダーカツト部となつていた突起１２ａ、
例えば玉縁等を有する成形品１２を、本発明の成
形方法により成形する際および脱型する際を示
す。成形品１２は第１０図のごとく、真空成形型
１３を突起１２ａ部において第一真空成形型１４
と第二真空成形型１５に分離することにより脱型
可能となる。もちろん、成形品内側にクツシヨン
材を形成した場合にも同様にして脱型可能とな
る。 FIGS. 9 and 10 show a protrusion 12a, which was an undercut in the conventional molding method,
For example, the process of molding and demolding a molded product 12 having a beaded edge or the like by the molding method of the present invention is shown. As shown in FIG.
By separating into the second vacuum mold 15 and the second vacuum mold 15, demolding becomes possible. Of course, even if a cushion material is formed inside the molded product, it can be removed from the mold in the same manner.
（作用・効果）
本発明は前記のごとく、シート状被加工材を深
しぼり部またはまたはアンダーカツト部を有する
成形品に成形する際に、まず第二真空成形型から
分離した第一真空成形型によつて深しぼり部また
はアンダーカツト部を含む部分を成形し、その後
第一真空成形型に第二真空成形型を合体して、他
の部分を一体に成形するものである。(Operations/Effects) As described above, when forming a sheet-like workpiece into a molded product having a deep draw portion or an undercut portion, the present invention first uses a first vacuum forming mold that is separated from a second vacuum forming mold. The part including the deep drawing part or the undercut part is molded by the molding method, and then the second vacuum molding mold is combined with the first vacuum molding mold, and the other parts are integrally molded.
そしてその効果は、真空成形型を分離した状態
で深しぼり部を最初に成形するため、深しぼり部
におけるシート状被加工材の局部的な伸びを押さ
えることができ、最終製品において深しぼりの大
なる成形品を得られることである。従つて、薄肉
化等の防止も実現でき、成形品内部に配設される
クツシヨン材の色も透視されず、かつシート状被
加工材に梨地模様等が付与されていた場合にも梨
地模様が薄くなることもないのである。 The effect of this is that since the deep drawing part is formed first with the vacuum forming mold separated, local elongation of the sheet-like workpiece material at the deep drawing part can be suppressed, and the large size of the deep drawing in the final product can be suppressed. It is possible to obtain a molded product with the following properties. Therefore, it is possible to prevent wall thinning, etc., the color of the cushion material disposed inside the molded product cannot be seen through, and even if the sheet-like workpiece has a satin pattern, etc., the satin pattern can be prevented. It does not become thinner.
更に、従来の成形法においては脱型不可能とな
る玉縁等のアンダーカツト部を有する成形品にお
いても、真空成形型を分離することにより脱型可
能となり、そのまま真空成形型を発泡型として利
用できる等の多くの効果を有する。 Furthermore, even for molded products with undercuts such as beads that cannot be demolded using conventional molding methods, it is now possible to demold them by separating the vacuum mold, allowing the vacuum mold to be used as a foaming mold. It has many effects such as:
第１図は真空成形法を説明する断面図、第２図
は従来の成形法によりクツシヨン材を形成する際
の断面図、第３図乃至第５図は本発明の成形工程
を示す断面図、第６図ないし第８図は本発明によ
り成形した成形品内側にクツシヨン材を形成する
際の成形工程を示す断面図、第９図および第１０
図は本発明の他の実施例を示す断面図である。
５′……成形品、５ａ……深しぼり部、５……
シート状被加工材、６……加熱装置、７……第一
真空成形型、８……第二真空成形型、９……真空
成形型、１０……クツシヨン材、１２……成形
品、１２ａ……アンダーカツト部を有する突部、
１３……真空成形型、１４……第一真空成形型、
１５……第二真空成形型。
FIG. 1 is a sectional view explaining the vacuum forming method, FIG. 2 is a sectional view when forming a cushion material by a conventional forming method, and FIGS. 3 to 5 are sectional views showing the forming process of the present invention. 6 to 8 are cross-sectional views showing the molding process when forming a cushion material inside the molded product according to the present invention, and FIGS. 9 and 10.
The figure is a sectional view showing another embodiment of the present invention. 5'... Molded product, 5a... Deep drawing part, 5...
Sheet-shaped workpiece, 6... Heating device, 7... First vacuum forming mold, 8... Second vacuum forming mold, 9... Vacuum forming mold, 10... Cushion material, 12... Molded product, 12a ...a protrusion having an undercut portion,
13... Vacuum forming mold, 14... First vacuum forming mold,
15...Second vacuum forming mold.
Claims (1)
ーカツト部を有する成形品に真空成形するに際し
て、 前記成形品の成形型を互いに分離合体可能な第
一真空成形型と第二真空成形型によつて構成する
とともに、 まず前記第一真空成形型を前記第二真空成形型
より分離して該第一真空成形型によつて、深しぼ
り部またはアンダーカツト部を含む部分を成形
し、 次いで、前記第一真空成形型に前記第二真空成
形型を合体して、他の部分を一体に成形すること
を特徴とする真空成形方法。[Scope of Claims] 1. When vacuum forming a sheet-like workpiece into a molded product having a deep drawing part or an undercut part, a first vacuum molding mold and a second vacuum molding mold capable of separating and combining the molding molds of the molded product with each other are provided. Consisting of a vacuum forming mold, first, the first vacuum forming mold is separated from the second vacuum forming mold, and a portion including the deep drawing part or the undercut part is formed by the first vacuum forming mold. Then, the second vacuum forming mold is combined with the first vacuum forming mold to integrally mold other parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16895683A JPS6061230A (en) | 1983-09-13 | 1983-09-13 | Molding method of skin material having deep-drawn portion or undercut portion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16895683A JPS6061230A (en) | 1983-09-13 | 1983-09-13 | Molding method of skin material having deep-drawn portion or undercut portion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6061230A JPS6061230A (en) | 1985-04-09 |
| JPH0512138B2 true JPH0512138B2 (en) | 1993-02-17 |
Family
ID=15877667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16895683A Granted JPS6061230A (en) | 1983-09-13 | 1983-09-13 | Molding method of skin material having deep-drawn portion or undercut portion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6061230A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834604C2 (en) * | 1988-10-11 | 1997-02-27 | Alkor Gmbh | Method and device for producing objects made of foam, which are coated with a thermoformable plastic sheet |
| ES2068876T3 (en) * | 1988-12-01 | 1995-05-01 | Bayer Ag | PROCEDURE FOR THE OBTAINING OF MOLDED PIECES OF SYNTHETIC MATTER EMBEDDED AT DEPTH. |
| JPH03292122A (en) * | 1990-04-10 | 1991-12-24 | United Mold Kk | New air-pressure/vacuum molding device and method |
| US5283028A (en) * | 1990-05-02 | 1994-02-01 | Penda Corporation | Process for producing a selectively reinforced thermoformed article |
| FR2862560A1 (en) * | 2004-04-20 | 2005-05-27 | Faurecia Interieur Ind | Motor vehicle interior trim component covering layer shaping procedure uses mould with base and closing member forming cavity in which covering layer is formed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5269Y2 (en) * | 1972-12-25 | 1977-01-05 |
-
1983
- 1983-09-13 JP JP16895683A patent/JPS6061230A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6061230A (en) | 1985-04-09 |
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