JPS6138017B2 - - Google Patents
Info
- Publication number
- JPS6138017B2 JPS6138017B2 JP53127680A JP12768078A JPS6138017B2 JP S6138017 B2 JPS6138017 B2 JP S6138017B2 JP 53127680 A JP53127680 A JP 53127680A JP 12768078 A JP12768078 A JP 12768078A JP S6138017 B2 JPS6138017 B2 JP S6138017B2
- Authority
- JP
- Japan
- Prior art keywords
- beads
- filling
- foamed
- molded product
- different
- 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
- 239000011324 bead Substances 0.000 claims description 32
- 239000006260 foam Substances 0.000 claims description 10
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 description 6
- 238000005187 foaming Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 expansion ratios Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 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
- B29C44/02—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
- B29C44/04—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 consisting of at least two parts of chemically or physically different materials, e.g. having different densities
-
- 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
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
- B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
Description
【発明の詳細な説明】
この発明は合成樹脂発泡成形品の製造方法に関
するもので、発泡成形品それ自体の特定部分を所
望の形状で具現している発泡成形品を工業的に有
利に製造することを目的とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin foam molded product, and it is an industrially advantageous method for manufacturing a foam molded product that embodies a specific part of the foam molded product itself in a desired shape. The purpose is to
従来、合成樹脂発泡成形品は、均一密度（倍
率）による一耐成形品であり、使用条件により、
外側を別素材により被覆したり、又、内側に別素
材の成形品をはめ込み、使用目的に合つた品質に
して使用に供している。しかしながらこの場合、
大変手間がかかるし、別素材の費用もかさむとい
う欠点があつた。更に、最近特開昭53−43762で
開示されている方法では、異種の予備発泡ビーズ
を空気の移動を利用して金型内に順次充填完了せ
しめた後、加熱発泡して一体成形しているが、こ
の技術ではビーズ充填口の形状が通常の形状であ
ることから、部分的に円形状の特定部分を持つた
成形品は得られるが、それ以外の三角形、長方
形、惰円形その他異形の所望形状を具現すること
は出来ない。 Traditionally, synthetic resin foam molded products are durable molded products with uniform density (magnification), and depending on the usage conditions,
The outside is coated with a different material, or the inside is fitted with a molded product made of a different material, and the quality is adjusted to match the purpose of use. However, in this case,
The drawbacks are that it is very time-consuming and requires additional materials. Furthermore, in a method recently disclosed in Japanese Patent Application Laid-Open No. 53-43762, different types of pre-foamed beads are sequentially filled into a mold using air movement, and then heated and foamed to form an integral mold. However, since the shape of the bead filling port is a normal shape with this technology, molded products with a specific partially circular part can be obtained, but other desired shapes such as triangular, rectangular, circular, etc. can be obtained. It is not possible to embody the shape.
この発明は上記欠点を解消できたもので、合成
樹脂発泡成形品それ自体の特定部分を意図した形
状の異種発泡部分を具現してなる合成樹脂発泡成
形品の製造方法を内容とする。以下詳細説明す
る。 The present invention solves the above-mentioned drawbacks, and is directed to a method for producing a synthetic resin foam molded product by embodying different types of foamed parts each having a shape intended for a specific part of the synthetic resin foam molded product itself. The details will be explained below.
本発明においては、成形用型の金型内に予備発
泡合成樹脂ビーズ（以下、簡単に予備発泡ビーズ
と呼ぶ）を空気の吹き込みを利用して充填するに
あたり、充填器の充填口部を所望の形状に相応し
た形状のもの（以下異形ノズルと称す）を取付け
使用するのであるが、先づ予備発泡ビーズを金型
内に初回の充填を行ない充填口より遠い部分に所
定量充填する。しかる後、切回とは樹脂材質、発
泡倍率、粒径、色彩等を異にした予備発泡ビーズ
（本発明では種類の異なるビーズ又は異種ビーズ
と呼ぶ）を所望の形状に相応する異形ノズルを取
付けた充填器で充填すると、空気の移動が充填口
異形ノズルの形状に添つて流れるにともない、予
備発泡ビーズもこの空気流に乗つて充填され金型
内は充満される。次いで通常の加熱による成形を
行うのである。かくして、成形品の特定部分を所
望の物性を持つ発泡体で形成（本発明では異種発
泡部分ないしは特定部分とも称す）せしめ、且つ
意図した形状が具現される。尚、異種ビーズの充
填のために複数個の充填器を設け、順次空気流に
より充填して行く場合に、例えば初回の充填を一
つの充填器で行なうとして、残りの充填器を通し
て空気流のみを金型中にブローさせておけば、そ
の異形ノズルに相応した部分には予備発泡ビーズ
が空気流にて排除されて充填されない。次に、そ
の排除された部分に異種ビーズを供給することに
より良好な状態にて所望の異形ノズルに相応した
異種ビーズの充填が可能となるので市場価値の高
い成形品を得ることが出来る。特に、この特定部
分の充填ビーズに低発泡度のものを使用すれば強
度も大きいので好適である。逆に強度の必要とし
ない場合には高発泡ビーズを使用することにより
成形品の重量が軽るくなりコストダウンがはかれ
る。 In the present invention, when filling the pre-foamed synthetic resin beads (hereinafter simply referred to as pre-foamed beads) into the mold of the mold by using air blowing, the filling opening of the filling device is inserted into the desired position. A nozzle with a shape corresponding to the shape (hereinafter referred to as an irregularly shaped nozzle) is attached and used. First, pre-foamed beads are filled into the mold for the first time, and a predetermined amount is filled in the part far from the filling port. After that, cutting involves attaching pre-foamed beads (referred to as different types of beads or different types of beads in the present invention) of different resin materials, expansion ratios, particle sizes, colors, etc. to a different-shaped nozzle corresponding to the desired shape. When the mold is filled with a filling device, as the air moves along the shape of the filling port irregularly shaped nozzle, the pre-foamed beads are also carried along with this air flow, and the inside of the mold is filled. Next, the molding is carried out by conventional heating. In this way, the specific portion of the molded product is made of a foam having desired physical properties (also referred to as a different foamed portion or specific portion in the present invention), and the intended shape is realized. In addition, when a plurality of filling devices are provided to fill different kinds of beads and the filling is performed sequentially using an air flow, for example, if the first filling is performed with one filling device, only the air flow is applied through the remaining filling devices. If the beads are blown into the mold, the pre-foamed beads will be removed by the air flow and will not be filled in the area corresponding to the irregularly shaped nozzle. Next, by supplying different types of beads to the excluded portion, it is possible to fill the desired irregularly shaped nozzle with different types of beads in a good condition, thereby making it possible to obtain a molded product with a high market value. In particular, it is preferable to use beads with a low degree of foaming for the filling beads in this specific part because the strength will be high. On the other hand, when strength is not required, the use of highly expanded beads reduces the weight of the molded product and reduces costs.
上記の通り、この発明の合成樹脂発泡成形品は
それ自体の特定部分に所望する形状が明瞭に具現
していて、所望の物性を持つ発泡部分で形成せし
めることが出来るので、従来の発泡物のようにそ
の外側を別素材により被覆したり、又、内側に別
素材の成形品をはめ込む必要がなく、発泡成形品
そのまゝの姿で使用できる。なお、本発明は実際
に実施していることにより、想像される以上に良
い状態にて所望形状の異種発泡部分が形成される
ので実用価置が大きい発明といえる。 As mentioned above, the synthetic resin foam molded product of the present invention clearly embodies a desired shape in a specific part of itself, and can be formed with a foamed part that has desired physical properties, so it is different from conventional foamed products. Thus, there is no need to cover the outside with a different material or insert a molded product of a different material inside, and the foamed molded product can be used as is. It should be noted that by actually implementing the present invention, a heterogeneous foamed portion having a desired shape is formed in a better condition than imagined, so it can be said that the present invention has great practical value.
なお、ビーズとしては、ポリスチレン系、ポリ
オレフイン系の予備発泡ビーズを用いることが好
ましい。 As the beads, it is preferable to use polystyrene-based or polyolefin-based pre-foamed beads.
第１図は、異形ノズルの１側の拡大正面図、第
２図−１は第１図の異形ノズルを使用した発泡成
形品の平面図、第２図−２は同縦断面図である。
第３図は、本発明用予備発泡ビーズの３個の充填
口部を有する充填器と金型の説明用断面図、第４
図の１は、上記充填器の３個の充填口部のうち中
央の異種ビーズ用充填口部の縦断面図、第４図の
２は、第４図の１の充填口部の右から見た正面図
とこれによつて成形した成形品の異種ビーズ部の
形状を示す平面図の三角及び四角の２例の図であ
る。
１……高発泡部、２……特定部分低発泡部、３
……異種ビーズの充填口の形状、４……予備発泡
ビーズ用容器、５……ビーズ用配管、６……充填
器、７……充填口。
FIG. 1 is an enlarged front view of one side of the irregularly shaped nozzle, FIG. 2-1 is a plan view of a foam molded product using the irregularly shaped nozzle of FIG. 1, and FIG. 2-2 is a longitudinal sectional view thereof.
FIG. 3 is an explanatory cross-sectional view of a mold and a filling device having three filling ports for pre-foamed beads of the present invention;
1 in the figure is a vertical cross-sectional view of the central filling port for different types of beads among the three filling ports of the above-mentioned filling device, and 2 in FIG. 4 is a vertical cross-sectional view of the filling port in 1 in FIG. FIG. 2 is a front view showing two examples of triangular and square plan views showing the shapes of dissimilar bead portions of a molded product formed using the same. 1...High foaming part, 2...Specific portion low foaming part, 3
... Shape of filling port for different types of beads, 4... Container for pre-foamed beads, 5... Piping for beads, 6... Filler, 7... Filling port.
Claims (1)
を複数個の充填口部を有する充填器により、空気
流によつて同一金型内に種類別に順次供給し、集
合配置充填させて加熱発泡し部分的に異種の発泡
部分を有する成形品を一体成形して製造するにあ
たり、異種発泡部分の所望形状に相応した形状の
充填口部即ち異形ノズルを有する充填器を使用
し、初回の充填に使用する以外の充填器にはビー
ズを移送せず空気流のみをブローさせることによ
り、異形ノズルに相応した部分には予備発泡ビー
ズの充填を排除し、次いでその排除部分に異種ビ
ーズを供給することにより充填し、一体成形する
ことを特徴とする合成樹脂発泡成形品の製造方
法。 ２ ビーズがポリスチレンである特許請求の範囲
第１項記載の製造方法。 ３ ビーズがポリオレフインである特許請求の範
囲第１項記載の製造方法。[Scope of Claims] 1 Pre-foamed synthetic resin beads of different types are sequentially supplied by type into the same mold using an air flow using a filling device having a plurality of filling ports, and the beads are packed in a collective arrangement. When manufacturing a molded product that is heat-foamed and partially has different foamed parts by integral molding, a filling machine with a filling opening, that is, a irregularly shaped nozzle, is used to match the desired shape of the different foamed parts. By blowing only the air flow without transferring beads to the filling devices other than those used for filling, the filling of pre-foamed beads is eliminated from the part corresponding to the irregularly shaped nozzle, and then different types of beads are added to the excluded part. A method for producing a synthetic resin foam molded product, characterized by filling the product by supplying it and integrally molding it. 2. The manufacturing method according to claim 1, wherein the beads are polystyrene. 3. The manufacturing method according to claim 1, wherein the beads are polyolefin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12768078A JPS5553538A (en) | 1978-10-17 | 1978-10-17 | Manufacturing of synthetic resin foaming molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12768078A JPS5553538A (en) | 1978-10-17 | 1978-10-17 | Manufacturing of synthetic resin foaming molded article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5553538A JPS5553538A (en) | 1980-04-19 |
| JPS6138017B2 true JPS6138017B2 (en) | 1986-08-27 |
Family
ID=14966043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12768078A Granted JPS5553538A (en) | 1978-10-17 | 1978-10-17 | Manufacturing of synthetic resin foaming molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5553538A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124932A (en) * | 1985-11-25 | 1987-06-06 | Yuusui Kasei Kogyo Kk | Simultaneous foam molding method by different kind of raw material |
| JP6080275B1 (en) | 2015-08-12 | 2017-02-15 | 株式会社ジェイエスピー | Vehicle seat core and vehicle seat member |
-
1978
- 1978-10-17 JP JP12768078A patent/JPS5553538A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5553538A (en) | 1980-04-19 |
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