JPH047689B2 - - Google Patents
Info
- Publication number
- JPH047689B2 JPH047689B2 JP59072479A JP7247984A JPH047689B2 JP H047689 B2 JPH047689 B2 JP H047689B2 JP 59072479 A JP59072479 A JP 59072479A JP 7247984 A JP7247984 A JP 7247984A JP H047689 B2 JPH047689 B2 JP H047689B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow body
- insert
- molding
- synthetic resin
- foam
- 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
- 239000000463 material Substances 0.000 claims description 35
- 229920003002 synthetic resin Polymers 0.000 claims description 31
- 239000000057 synthetic resin Substances 0.000 claims description 31
- 239000006260 foam Substances 0.000 claims description 29
- 238000000465 moulding Methods 0.000 claims description 18
- 238000000071 blow moulding Methods 0.000 claims description 17
- 239000011810 insulating material Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 238000001175 rotational moulding Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 description 6
- 239000012778 molding material Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、インサートを有する合成樹脂製中空
体の同時一体成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for simultaneous integral molding of a synthetic resin hollow body having an insert.
（従来技術の説明）
自動車のヘツドレストの表皮に代表される、イ
ンサートを有する合成樹脂製中空体は、ブロー成
形、すなわち、インサートの周囲に押出機から成
形材料をチユーブ状（一般にパリソンと称され
る。）に押し出し、これをただちに金型ではさみ、
内部に空気を吹き込んで中空体を成形する方法に
よつて、あるいは、回転成形、すなわち、インサ
ートがセツトされた中空の割型の中へ流動性のよ
い成形材料、たとえば塩化ビニル樹脂ペーストま
たは粉末ポリエチレン等を入れて密閉し、その後
金型を回転させながら加熱して金型内壁に溶融樹
脂層を形成し、金型を冷却して中空体を成形する
方法によつて成形される。(Description of the Prior Art) Synthetic resin hollow bodies with inserts, as typified by the skin of automobile headrests, are manufactured by blow molding, in which molding material is molded around the insert from an extruder into a tube shape (generally called a parison). .) and immediately sandwich it between molds,
By blowing air into the hollow body to form a hollow body, or by rotational molding, i.e. by placing a molding material with good flowability, such as vinyl chloride resin paste or powdered polyethylene, into a hollow split mold in which an insert is set. etc., and the mold is sealed, and then the mold is heated while being rotated to form a molten resin layer on the inner wall of the mold, and the mold is cooled to form a hollow body.
ところが、前者のブロー成形にあつては、成形
材料がかなり高温であるのに対してインサートが
常温である為に、また後者の回転成形にあつて
は、通常インサートの一部が金型の外部へ突出し
た状態で金型に保持されており、かつインサート
は材質的に成形型より昇温が遅く、その結果成形
材料より低温に維持されることととなるために、
金型閉型時あるいは金型の回転、加熱時にインサ
ートと接する成形材料のその部分は、温度が低く
なつて延性の低下を生じたり、不完全ゲル状態と
なるためにその部分と他の部分との物性、外観等
が異なることとなり成形不良を生じ易い虞があつ
た。 However, in the former type of blow molding, the molding material is at a fairly high temperature while the insert is at room temperature, and in the latter type of rotary molding, a part of the insert is usually outside the mold. The insert is held in the mold in a protruding state, and the temperature of the insert is slower than that of the mold due to its material, and as a result, it is maintained at a lower temperature than the molding material.
The part of the molding material that comes into contact with the insert when the mold is closed, when the mold is rotated, or when it is heated may become less ductile due to the lower temperature, or may become in an incomplete gel state, causing the parts of the molding material to bond with other parts. Since the physical properties, appearance, etc. of the two materials differ, there is a risk that molding defects may easily occur.
また、得られた中空体を発泡成形型にセツトし
て該中空体内にクツシヨン材形成液状原料を注入
し、クツシヨン材を発泡形成する場合に、発泡成
形型とインサート間のシールが不良になつて、ク
ツシヨン材形成液状原料が発泡時に発泡成形型か
ら漏出する虞があつた。 In addition, when the obtained hollow body is set in a foam mold and a liquid raw material for forming a cushion material is injected into the hollow body to foam and form the cushion material, the seal between the foam mold and the insert may become defective. There was a risk that the liquid raw material for forming the cushion material would leak from the foam mold during foaming.
（発明が解決しようとする課題）
本発明はこのような点に鑑みてなされたもの
で、インサートを有する合成樹脂製中空体を、成
形不良を生じることなく成形することができ、し
かも、その成形後の中空体を発泡成形型にセツト
して、該中空体内にクツシヨン材を発泡形成する
際にクツシヨン材形成液状原料が発泡成形型から
漏出する虞のない、中空体の成形方法を提供せん
とするものである。(Problems to be Solved by the Invention) The present invention has been made in view of the above points, and is capable of molding a synthetic resin hollow body having an insert without causing molding defects. It is an object of the present invention to provide a method for molding a hollow body in which there is no possibility that the liquid raw material for forming the cushion material leaks from the foam mold when the hollow body is set in the foam mold and the cushion material is foamed into the hollow body. It is something to do.
（課題を解決するための手段）
前記の目的を達成する本発明の要旨は、インサ
ートを有する合成樹脂製中空体をブロー成形ある
いは回転成形により同時一体成形する際に、合成
樹脂製中空体形成材料が接するまたは接する虞の
あるインサートの所定部分を発泡体からなる断熱
材により覆つて合成樹脂製中空体を成形すること
を特徴とする、インサートを有する合成樹脂製中
空体の成形方法にある。(Means for Solving the Problems) The gist of the present invention for achieving the above object is that when simultaneously integrally molding a synthetic resin hollow body having an insert by blow molding or rotational molding, the synthetic resin hollow body forming material A method for molding a synthetic resin hollow body having an insert, characterized in that the synthetic resin hollow body is molded by covering a predetermined portion of the insert that comes into contact with or is likely to come into contact with a heat insulating material made of foam.
（作用）
ブロー成形または回転成形時、合成樹脂製中空
体形成材料と接するまたは接する虞のあるインサ
ートの所定部分が発泡体からなる断熱材で覆われ
ているため、高温の合成樹脂製中空体形成材料が
常温のインサートに直接触れず、急冷されること
がない。更に、その断熱材の断熱作用により、合
成樹脂製中空体形成材料の保有熱がインサートに
伝熱するのが妨げられ、それによつても該中空体
形成材料の冷却が防止される。また、得られた合
成樹脂製中空体を発泡成形型にセツトし、該中空
体内にクツシヨン材形成液状原料を注入して、ク
ツシヨン材を発泡成形する場合に、インサートの
所定部分を覆う発泡体からなる断熱材が、その発
泡体の特性により、発泡成形型とインサート間に
あつてパツキンとして働き、クツシヨン材形成液
状原料が発泡成形型から漏出する虞がなくなる。(Function) During blow molding or rotary molding, certain parts of the insert that come into contact with or may come into contact with the synthetic resin hollow body forming material are covered with a heat insulating material made of foam, which prevents the formation of high temperature synthetic resin hollow bodies. The material does not come into direct contact with the room-temperature insert and is not rapidly cooled. Furthermore, the heat insulating effect of the heat insulating material prevents the heat retained in the synthetic resin hollow body forming material from being transferred to the insert, thereby also preventing cooling of the hollow body forming material. In addition, when the obtained synthetic resin hollow body is set in a foam mold and the cushion material forming liquid raw material is injected into the hollow body to foam mold the cushion material, the foam covering a predetermined portion of the insert can be Due to the properties of the foam, the heat insulating material acts as a seal between the foam mold and the insert, eliminating the possibility that the liquid raw material for forming the cushion material will leak from the foam mold.
（実施例）
以下添付図面を用いてブロー成形を例として本
発明を工程順に説明する。(Example) The present invention will be described below in the order of steps using blow molding as an example using the accompanying drawings.
(イ) 発泡体からなる断熱材によるインサートの所
定部分の被覆工程（第１図）
合成樹脂または金属、あるいはそれらの複合
体からなるインサート１において、後述するブ
ロー成形型の閉型時に合成樹脂製中空体形成材
料と接するまたは接する虞のある所定部分を、
ポリウレタンフオーム等の発泡体からなる断熱
材２により被覆する。(b) Process of covering a predetermined part of the insert with a heat insulating material made of foam (Fig. 1) In the insert 1 made of synthetic resin, metal, or a composite thereof, when the blow molding mold is closed, as described later, A predetermined portion that comes into contact with, or may come into contact with, the hollow body forming material,
It is covered with a heat insulating material 2 made of a foam such as polyurethane foam.
なお、ヘツドレスが穴あきヘツドレストであ
つて、環状中空体の表皮に環状部を有するイン
サート１′が内包一体化される場合にあつては、
第６図に示すように中空体形成材料が接する虞
のある部分に、発泡体からなる断熱材２を被覆
するとよい。発泡体からなる断熱材は、被覆部
分の形状に応じてシート状、環状等任意の形状
のものが使用され、被覆部分に添着または被着
される。 In addition, when the headrest is a perforated headrest and the insert 1' having the annular portion is integrated into the outer skin of the annular hollow body,
As shown in FIG. 6, a heat insulating material 2 made of foam may be coated on a portion where the hollow body forming material may come into contact. The heat insulating material made of foam may have any shape, such as a sheet or annular shape, depending on the shape of the covered portion, and is attached or attached to the covered portion.
(ロ) 合成樹脂製中空体形成材料の配置工程（第２
図）
軟質塩化ビニル樹脂等の熱可塑性合成樹脂か
らなる所定温度に加熱可塑化されたチユーブ状
の合成樹脂製中空体形成材料３を、前記インサ
ート１，１′を包囲して配置する。なお、４，
４はブロー成形型で、前記合成樹脂製中空体形
成材料３の外方に配置される。また、インサー
ト１′が環状部を有する場合にあつては、第７
図に示すごとく配される。(b) Placement process of synthetic resin hollow body forming material (second
Figure) A tubular synthetic resin hollow body forming material 3 made of a thermoplastic synthetic resin such as soft vinyl chloride resin and heat-plasticized at a predetermined temperature is placed surrounding the inserts 1 and 1'. In addition, 4,
Reference numeral 4 denotes a blow molding die, which is disposed outside the synthetic resin hollow body forming material 3. In addition, if the insert 1' has an annular portion, the seventh
Arranged as shown in the figure.
(ハ) ブロー成形型の閉型工程（第３図）
ブロー成形型４，４を閉じる。これによつ
て、前記合成樹脂製中空体形成材料３はブロー
成形型４，４により挟まれ、密閉中空体を形成
する。この時、インサート１，１′がブロー成
形型４，４により挟まれる部分、あるいは中空
体形成材料３が接する虞のある部分において
は、インサート１と合成樹脂製中空体形成材料
３との間に前記発泡体からなる断熱材２が介在
し、合成樹脂製中空体形成材料３とインサート
１との直接の接触を防止している。(c) Blow molding mold closing process (Figure 3) Close the blow molding molds 4,4. As a result, the synthetic resin hollow body forming material 3 is sandwiched between the blow molding molds 4, 4 to form a sealed hollow body. At this time, in the part where the inserts 1, 1' are sandwiched between the blow molding molds 4, 4, or in the part where there is a possibility that the hollow body forming material 3 may come into contact, there is a gap between the insert 1 and the synthetic resin hollow body forming material 3. A heat insulating material 2 made of the foam is interposed to prevent direct contact between the synthetic resin hollow body forming material 3 and the insert 1.
(ニ) 圧搾空気の吹き込み工程（第４図）
ブロー成形型４，４によつてはさまれた合成
樹脂製中空体形成材料３が形成する前記密閉中
空体内に圧搾空気を吹き込み、合成樹脂製中空
体形成材料３をふくらませ、ブロー成形型４，
４のキヤビテイ面４ａ，４ａに密着させて所望
の中空体形状にする。(d) Compressed air blowing process (Fig. 4) Compressed air is blown into the sealed hollow body formed by the synthetic resin hollow body forming material 3 sandwiched between the blow molding molds 4, 4, and the synthetic resin The hollow body forming material 3 is inflated, and the blow molding mold 4,
4 to form a desired hollow body shape.
この後前記成形体を脱型し、トリミングして製
品を得る。 Thereafter, the molded body is demolded and trimmed to obtain a product.
第５図は回転成形による場合を説明する断面図
である。回転成形型５，５に装着されたインサー
ト１は、回転成形型５，５の回転、加熱時に、キ
ヤビテイ５ａ内に投入され、加熱により溶融し始
めた塩化ビニル樹脂ペースト等の合成樹脂製中空
体形成材料６がインサート１と接することのない
ように所定部が発泡体からなる断熱材２によつて
覆われている。そして、回転成形型５，５の回
転、加熱によりキヤビテイ５ａ面に溶融樹脂層を
形成し、冷却硬化後成形体を取り出して製品を得
る。 FIG. 5 is a sectional view illustrating the case of rotational molding. The insert 1 attached to the rotary molding molds 5, 5 is a hollow body made of synthetic resin such as vinyl chloride resin paste that is inserted into the cavity 5a when the rotary molding molds 5, 5 are rotated and heated, and begins to melt due to heating. A predetermined portion is covered with a heat insulating material 2 made of foam so that the forming material 6 does not come into contact with the insert 1. Then, a molten resin layer is formed on the surface of the cavity 5a by rotation and heating of the rotary molds 5, 5, and after cooling and hardening, the molded body is taken out to obtain a product.
もちろん、発泡体からなる断熱材で覆われるイ
ンサートの部位は図示の部分に限定されるもので
はなく、合成樹脂製中空体形成材料が触れる部分
すべてが対象であり、補強部分あるいはステー部
分を問わない。また、発泡体からなる断熱材の被
覆も第１図のごとく周囲の全部を覆う場合だけに
限られるのではなく、一部のみに行われることも
ある。 Of course, the parts of the insert that are covered with the foam heat insulating material are not limited to the parts shown in the diagram, but include all parts that come into contact with the synthetic resin hollow body forming material, regardless of whether they are reinforcement parts or stay parts. . Further, the covering of the heat insulating material made of foam is not limited to covering the entire surrounding area as shown in FIG. 1, but may be applied to only a part of the surrounding area.
（発明の効果）
前記のごとく本発明は、ヘツドレスの表皮に代
表されるインサートを有する合成樹脂製中空体
を、ブロー成形または回転成形時に、そのインサ
ートの所定部を覆う発泡体からなる断熱材によ
り、高温の合成樹脂製中空体形成材料が常温のイ
ンサートに直接触れないようにし、かつ、その所
定部と該中空体形成材料間を前記断熱材により断
熱状態にして、成形する方法である。従つて本発
明によれば、成形中に合成樹脂製中空体形成材料
が部分的に急冷されてその部分において延性が低
下することがなくなるので、常に物性及び外観に
おいて優れた製品を得ることができ、不良品を生
じることがない。また、ヘツドレストのごとく、
前記中空体をその後発泡成形型にセツトして該中
空体内にクツシヨン材を形成する場合に、前記発
泡体からなる断熱材が、その発泡体の特性によつ
てパツキンの働きをすることにより、発泡成形型
とインサートとのシールがより完全に行われるこ
ととなり、クツシヨン材形成液状原料が発泡時に
発泡成形型より漏出する虞がなくなる効果も有
る。(Effects of the Invention) As described above, the present invention provides a heat insulating material made of foam that covers a predetermined portion of the insert during blow molding or rotary molding of a synthetic resin hollow body having an insert, such as a headless skin. This is a molding method in which the high-temperature synthetic resin hollow body-forming material does not directly touch the room-temperature insert, and the space between the predetermined portion and the hollow body-forming material is insulated by the heat insulating material. Therefore, according to the present invention, the material for forming the synthetic resin hollow body is not partially quenched during molding and the ductility is not reduced in that part, so it is possible to always obtain a product with excellent physical properties and appearance. , there will be no defective products. Also, like headrest,
When the hollow body is then set in a foaming mold to form a cushion material inside the hollow body, the heat insulating material made of the foam acts as a packing due to the characteristics of the foam, thereby forming a foam. The sealing between the mold and the insert is more complete, and there is also the effect that there is no possibility that the liquid raw material for forming the cushion material will leak from the foam mold during foaming.
図面は本発明に関し、第１図はインサートの斜
視図、第２図乃至第４図はブロー成形による成形
工程を説明する断面図、第５図は回転成形時の断
面図であり、また第６図及び第７図は本発明の他
実施例に関するもので、第６図はインサートの正
面図、第７図はブロー成形時の成形型及びインサ
ートの断面図である。図中１はインサート、２は
発泡体からなる断熱材、３，６は合成樹脂製中空
体形成材料、４ａはキヤビテイ面、４はブロー成
形型、５は回転成形型、５ａはキヤビテイであ
る。
The drawings relate to the present invention; FIG. 1 is a perspective view of the insert, FIGS. 2 to 4 are sectional views explaining the molding process by blow molding, FIG. 5 is a sectional view during rotational molding, and FIG. 7 and 7 relate to another embodiment of the present invention, FIG. 6 is a front view of the insert, and FIG. 7 is a sectional view of the mold and insert during blow molding. In the figure, 1 is an insert, 2 is a heat insulating material made of foam, 3 and 6 are synthetic resin hollow body forming materials, 4a is a cavity surface, 4 is a blow mold, 5 is a rotary mold, and 5a is a cavity.
Claims (1)
ー成形あるいは回転成形により同時一体成形する
際に、合成樹脂製中空体形成材料が接するまたは
接する虞のあるインサートの所定部分を発泡体か
らなる断熱材により覆つて合成樹脂製中空体を成
形することを特徴とする、インサートを有する合
成樹脂製中空体の成形方法。1. When simultaneously integrally molding a synthetic resin hollow body having an insert by blow molding or rotational molding, a predetermined portion of the insert that comes into contact with or is likely to come into contact with the synthetic resin hollow body forming material is covered with a heat insulating material made of foam. A method for molding a synthetic resin hollow body having an insert, the method comprising molding the synthetic resin hollow body with an insert.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7247984A JPS6140116A (en) | 1984-04-11 | 1984-04-11 | Molding method of synthetic resin hollow substance having insert |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7247984A JPS6140116A (en) | 1984-04-11 | 1984-04-11 | Molding method of synthetic resin hollow substance having insert |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6140116A JPS6140116A (en) | 1986-02-26 |
| JPH047689B2 true JPH047689B2 (en) | 1992-02-12 |
Family
ID=13490493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7247984A Granted JPS6140116A (en) | 1984-04-11 | 1984-04-11 | Molding method of synthetic resin hollow substance having insert |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6140116A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS572093A (en) * | 1980-06-04 | 1982-01-07 | Matsushita Electric Ind Co Ltd | Effect device for electronic musical instrument |
| DE3730488A1 (en) * | 1987-09-11 | 1989-03-23 | Rehau Ag & Co | METHOD FOR PRODUCING A BLOW MOLDED BODY |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4952858A (en) * | 1972-09-20 | 1974-05-22 |
-
1984
- 1984-04-11 JP JP7247984A patent/JPS6140116A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4952858A (en) * | 1972-09-20 | 1974-05-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6140116A (en) | 1986-02-26 |
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