JP2015066795A - Electric heating type block foam manufacturing apparatus - Google Patents
Electric heating type block foam manufacturing apparatus Download PDFInfo
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- JP2015066795A JP2015066795A JP2013202826A JP2013202826A JP2015066795A JP 2015066795 A JP2015066795 A JP 2015066795A JP 2013202826 A JP2013202826 A JP 2013202826A JP 2013202826 A JP2013202826 A JP 2013202826A JP 2015066795 A JP2015066795 A JP 2015066795A
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- Prior art keywords
- block
- foam
- foaming
- manufacturing apparatus
- iron plate
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- Granted
Links
- 239000006260 foam Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000005485 electric heating Methods 0.000 title claims abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 abstract description 3
- 239000004568 cement Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 238000005187 foaming Methods 0.000 description 23
- 238000010438 heat treatment Methods 0.000 description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
- 239000004088 foaming agent Substances 0.000 description 6
- 239000003431 cross linking reagent Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000011787 zinc oxide Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- USVVENVKYJZFMW-ONEGZZNKSA-N (e)-carboxyiminocarbamic acid Chemical compound OC(=O)\N=N\C(O)=O USVVENVKYJZFMW-ONEGZZNKSA-N 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
- -1 Polyethylene Polymers 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- MYOQALXKVOJACM-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy pentaneperoxoate Chemical compound CCCCC(=O)OOOC(C)(C)C MYOQALXKVOJACM-UHFFFAOYSA-N 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Molding Of Porous Articles (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
本発明は、プラスチック、ゴムのブロック状化学発泡体の製造装置に関するものである。 The present invention relates to an apparatus for producing a block-like chemical foam of plastic or rubber.
ブロック状プラスチック発泡体の製造方法としては種々の方法が提案されている。例えば特公平６−２２９２３においては二段発泡法において、第一次工程で得られた中間一次発泡体を第二工程において最終製品の形状、寸法を有する金型に入れ蒸気加熱によって発泡させる方法が記載されている。 Various methods have been proposed as a method for producing a block-shaped plastic foam. For example, in Japanese Patent Publication No. 6-22923, in the two-stage foaming method, the intermediate primary foam obtained in the first step is put in a mold having the shape and dimensions of the final product in the second step and foamed by steam heating. Have been described.
しかしながら特許文献記載の装置の場合、加熱可能な温度範囲は熱媒の温度に限定される。蒸気を熱媒に用いた装置の場合、１ＭＰａボイラーを用いても加熱温度は１７０℃が限界である。温度が高いほど発泡速度が早くなる傾向がある為、蒸気によって得られる温度では発泡時間が長く生産性が低いという問題があった。従って、本発明の目的は上記の問題点を克服し作業性に優れたブロック状発泡体の製造装置を提供する事にある。 However, in the case of the device described in the patent document, the temperature range in which heating is possible is limited to the temperature of the heat medium. In the case of an apparatus using steam as a heat medium, the heating temperature is limited to 170 ° C. even if a 1 MPa boiler is used. The higher the temperature, the faster the foaming speed tends to be. Therefore, the temperature obtained by steam has a problem that the foaming time is long and the productivity is low. Accordingly, an object of the present invention is to provide an apparatus for producing a block-like foam that overcomes the above problems and has excellent workability.
本発明のブロック状発泡体の製造装置は、上記目的を達成するために蒸気を用いずに、電気ヒーターを熱源とする。電気ヒーターはワット密度８Ｗ／ｃｍ３にすることで金型内温度４００℃が可能である。 The apparatus for producing a block-shaped foam of the present invention uses an electric heater as a heat source without using steam in order to achieve the above object. The electric heater can have a temperature in the mold of 400 ° C. by setting the watt density to 8 W / cm 3 .
製造装置は直方体構造。各面は独立したブロックで構成される。各ブロックの外郭は鉄板で構成されており電気ヒーターを内蔵する。 The manufacturing equipment has a rectangular parallelepiped structure. Each face is composed of independent blocks. The outer shell of each block is made of iron plate and incorporates an electric heater.
電気ヒーターを上下左右前後の６面に設置する事により金型内に置かれた発泡体を全周囲から加熱する事が可能である。電気ヒーターは面毎に温度設定ができる。 It is possible to heat the foam placed in the mold from the entire circumference by installing electric heaters on the top, bottom, left and right, front and back. The electric heater can be set for each surface.
本発明によれば、従来よりも高温で加熱できる事から反応時間の短縮が可能となる。また化学発泡剤の反応温度は２００℃を超えており、蒸気加熱によって得られる温度では反応が起こらない為、反応温度を下げるための発泡助剤が多く必要であったが、本発明によれば、発泡助剤の使用量を削減する事により原料費を削減する事が出来る。 According to the present invention, the reaction time can be shortened because it can be heated at a higher temperature than before. Moreover, since the reaction temperature of the chemical foaming agent exceeds 200 ° C. and no reaction occurs at the temperature obtained by steam heating, a large amount of foaming aid for lowering the reaction temperature was necessary. The cost of raw materials can be reduced by reducing the amount of foaming aid used.
本発泡機は箱型構造をしており、６面全てに電気ヒーターを内蔵しているため、発泡体の全方向から加熱する事が可能である。各面を構成する金型は５面が鉄板の溶接構造となっており、発泡体の発泡圧に耐えるだけの強度を有する。発泡体に接していない外側の一面は取り外しが可能であるのでヒーターの交換、メンテナンスが容易になっている。金型内部に電気ヒーターを固定し、繊維強化セメント板を被せて断熱している。金型外側は断熱性を高める為、板状グラスファイバーと亜鉛鉄板で覆っている。 This foaming machine has a box-type structure, and since electric heaters are built in all six surfaces, it is possible to heat the foam from all directions. The molds constituting each surface have a welded structure of five steel plates, and have a strength sufficient to withstand the foaming pressure of the foam. Since the outer surface that is not in contact with the foam is removable, the heater can be easily replaced and maintained. An electric heater is fixed inside the mold and covered with a fiber reinforced cement board for heat insulation. The outside of the mold is covered with sheet glass fiber and galvanized iron plate to enhance heat insulation.
本発泡機は、上面が昇降動装置により上下する。これにより上面の開閉と発泡体を任意の厚みに調節する事が可能である。側面にあたる４面のうち、２面は底面に溶接されており、２面が開閉可能となっているので発泡体を横から取り出す事も可能である。電気ヒーターは６面ともにＰＩＤ制御により温度を管理している。６面全てを同じ温度に設定する事も可能であるし、上面と下面の温度を変えて発泡させる事も可能である。 The upper surface of this foaming machine is moved up and down by an elevating device. Thereby, opening and closing of the upper surface and the foam can be adjusted to an arbitrary thickness. Of the four surfaces corresponding to the side surfaces, two surfaces are welded to the bottom surface, and since the two surfaces can be opened and closed, the foam can be taken out from the side. The electric heaters on all six sides manage the temperature by PID control. It is possible to set all six surfaces to the same temperature, or it is possible to foam by changing the temperature of the upper and lower surfaces.
以下に実施例をあげて本発明の詳細な説明を行うが、本発明は下記実施例に限定されるものではない。 Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples.
低密度ポリエチレン樹脂（商品名：ＹＦ−３０、日本ポリエチレン株式会社）１００重量部（以下「部」と記載する）、熱分解型発泡剤としてアゾジカルボン酸アミド（商品名：ビニホールＡＣ＃３Ｋ−７、永和化成工業株式会社）１６．５部、発泡助剤として酸化亜鉛（商品名：酸化亜鉛一種、正同化学工業株式会社）０．２部、架橋剤としてジクミルパーオキサイド（商品名：パークミルＤ、日油株式会社）０．５部をミキシングロールにて混練し、得られた組成物を加圧密閉金型中に充填し、１００ｋｇ／ｃｍ２の外圧をかけて１５０℃で４０分間加熱し、発泡剤および架橋剤を部分的に分解した後、除圧して中間一次発泡体を得た。中間一次発泡体は厚み、縦、横共に１．５倍に膨張していた。この中間一次発泡体をあらかじめ１８０℃に予熱した本発明の発泡機（内部寸法：３５０×３５０×１００ｍｍ）内に載置した。ヒーター出力４．０ｋｗ、金型温度１８０℃にて加熱した発泡剤および架橋剤を分解した。２５分後に最終厚みになり発泡体を取り出し架橋ポリエチレン発泡体を得た。得られた発泡体は見かけ密度０．０３ｇ／ｃｍ３であった。 Low-density polyethylene resin (trade name: YF-30, Nippon Polyethylene Co., Ltd.) 100 parts by weight (hereinafter referred to as “parts”), azodicarboxylic acid amide (trade name: Binihol AC # 3K-7) as a pyrolytic foaming agent Yonewa Kasei Kogyo Co., Ltd.) 16.5 parts, zinc oxide as a foaming aid (trade name: Zinc Oxide, Shodo Chemical Industry Co., Ltd.) 0.2 part, dicumyl peroxide (trade name: Park Mill) D, NOF Corporation) kneaded 0.5 parts with a mixing roll, filled the resulting composition into a pressure sealed mold, heated at 150 ° C. for 40 minutes with an external pressure of 100 kg / cm 2. Then, after partially decomposing the foaming agent and the crosslinking agent, the pressure was released to obtain an intermediate primary foam. The intermediate primary foam expanded 1.5 times in thickness, length and width. This intermediate primary foam was placed in the foaming machine of the present invention (internal dimensions: 350 × 350 × 100 mm) preheated to 180 ° C. in advance. The foaming agent and the crosslinking agent heated at a heater output of 4.0 kw and a mold temperature of 180 ° C. were decomposed. After 25 minutes, the final thickness was reached, and the foam was taken out to obtain a crosslinked polyethylene foam. The obtained foam had an apparent density of 0.03 g / cm 3 .
比較例１
実施例１において、発泡助剤として酸化亜鉛０．４部を使用した以外は実施例１と同じ配合物をミキシングロールにて混練し、得られた組成物を加圧密閉金型中に充填し、１００ｋｇ／ｃｍ２の外圧をかけて１５０℃で４０分間加熱し、発泡剤および架橋剤を部分的に分解した後、除圧して中間一次発泡体を得た。中間一次発泡体は厚み、縦、横共に１．７倍に膨張していた。得られた中間一次発泡体を、あらかじめ１５０℃に予熱した特許文献１のように加熱水蒸気の流路を周囲に設けた気密ではない開閉式金型を有する発泡装置に載置して１５０℃の蒸気で加熱した。４０分後に最終厚みになり加熱を終了した。
第２工程での発泡時間の差は１５分であった。本発明における発泡機を用いた場合は発泡時間を短縮すると共に発泡助剤の量を削減する事ができた。
Comparative Example 1
In Example 1, except that 0.4 part of zinc oxide was used as a foaming aid, the same composition as in Example 1 was kneaded with a mixing roll, and the resulting composition was filled into a pressure-sealing mold. After applying an external pressure of 100 kg / cm 2 and heating at 150 ° C. for 40 minutes to partially decompose the foaming agent and the crosslinking agent, the pressure was removed to obtain an intermediate primary foam. The intermediate primary foam expanded 1.7 times in thickness, length and width. The obtained intermediate primary foam was placed on a foaming apparatus having a non-hermetic open / close mold provided with a flow path of heated steam, as in Patent Document 1 preheated to 150 ° C. Heated with steam. After 40 minutes, the final thickness was reached and heating was terminated.
The difference in foaming time in the second step was 15 minutes. When the foaming machine of the present invention was used, the foaming time could be shortened and the amount of foaming aid could be reduced.
低密度ポリエチレン樹脂（商品名：ＹＦ−３０、日本ポリエチレン株式会社）１００部、熱分解型発泡剤としてアゾジカルボン酸アミド（商品名：ビニホールＡＣ＃３Ｋ−７、永和化成工業株式会社）１９部、架橋剤としてジクミルパーオキサイド（商品名：パークミルＤ、日油株式会社）０．５部、およびｎ−ブチル−４，４−ジ（ｔ−ブチルパーオキシ）ペンタノアート（商品名：パーヘキサＶ−４０、日油株式会社）０．５部をミキシングロールにて混練し、得られた組成物を加圧密閉金型中に充填し、１００ｋｇ／ｃｍ２の外圧をかけて１３６℃で５０分間加熱し、架橋剤を部分的に分解した。この中間一次発泡体をあらかじめ２００℃に予熱した本発明の発泡機（内部寸法：３５０×３５０×１００ｍｍ）内に載置し、ヒーター出力４．０ｋｗ、金型温度２００℃にて加熱した発泡剤および架橋剤を分解した。加熱開始３０分後に最終厚みになり加熱を終了し、発泡体を取り出し架橋ポリエチレン発泡体を得た。得られた発泡体は見かけ密度０．０３ｇ／ｃｍ３であった。 100 parts of low density polyethylene resin (trade name: YF-30, Nippon Polyethylene Co., Ltd.), 19 parts of azodicarboxylic acid amide (trade name: VINYHALL AC # 3K-7, Eiwa Kasei Kogyo Co., Ltd.) as a thermal decomposition type foaming agent, Dicumyl peroxide (trade name: Park Mill D, NOF Corporation) as a cross-linking agent and n-butyl-4,4-di (t-butylperoxy) pentanoate (trade name: Perhexa V) -40, NOF Corporation) 0.5 parts was kneaded with a mixing roll, the obtained composition was filled into a pressure-sealing mold, and an external pressure of 100 kg / cm 2 was applied at 136 ° C. for 50 minutes. Heated to partially decompose the crosslinker. This intermediate primary foam was placed in the foaming machine of the present invention (internal dimensions: 350 × 350 × 100 mm) preheated to 200 ° C. in advance and heated at a heater output of 4.0 kw and a mold temperature of 200 ° C. And decomposed the cross-linking agent. 30 minutes after the start of heating, the final thickness was reached, heating was terminated, and the foam was taken out to obtain a crosslinked polyethylene foam. The obtained foam had an apparent density of 0.03 g / cm 3 .
比較例２
実施例２において、発泡助剤として酸化亜鉛０．０２部を添加した以外は実施例２と同じ配合および同じ方法で中間一次発泡体を得、あらかじめ１６０℃に予熱した特許文献１のように加熱水蒸気の流路を周囲に設けた気密ではない開閉式金型を有する発泡装置に載置して１６０℃の蒸気で加熱した。９０分後に最終厚みになり加熱を終了した。第２工程での発泡時間の差は６０分であった。
比較例２では発泡助剤を用いたのに対し、実施例２では発泡助剤を用いずに発泡する事ができた。
In Example 2, except that 0.02 part of zinc oxide was added as a foaming aid, an intermediate primary foam was obtained by the same composition and method as in Example 2, and heated as in Patent Document 1 preheated to 160 ° C. in advance. It mounted in the foaming apparatus which has the opening-and-closing mold which is not airtight which provided the flow path of water vapor | steam, and heated with 160 degreeC vapor | steam. After 90 minutes, the final thickness was reached and heating was terminated. The difference in foaming time in the second step was 60 minutes.
In Comparative Example 2, a foaming aid was used, whereas in Example 2, foaming was possible without using a foaming aid.
Claims (2)
The electric heating type block foam manufacturing apparatus according to claim 1, wherein the watt density of the electric heater is 8 W / cm 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013202826A JP6258651B2 (en) | 2013-09-28 | 2013-09-28 | Electric heating block foam production equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013202826A JP6258651B2 (en) | 2013-09-28 | 2013-09-28 | Electric heating block foam production equipment |
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| JP2015066795A true JP2015066795A (en) | 2015-04-13 |
| JP6258651B2 JP6258651B2 (en) | 2018-01-10 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51122171U (en) * | 1975-03-31 | 1976-10-04 | ||
| JPH05345363A (en) * | 1992-06-17 | 1993-12-27 | Sekisui Chem Co Ltd | Two-stage foam molding method and apparatus |
| JPH07132521A (en) * | 1993-05-28 | 1995-05-23 | Natl House Ind Co Ltd | Manufacture of heat insulating panel |
| JPH10202677A (en) * | 1997-01-27 | 1998-08-04 | Sanwa Kako Co Ltd | Heating type foaming machine with mold of variable vertical interval |
| JP2000280266A (en) * | 1999-03-29 | 2000-10-10 | Sharp Corp | Core material for thermal insulating material and its preparation and vacuum thermal insulating material |
| JP2001071334A (en) * | 1999-06-30 | 2001-03-21 | Sumitomo Heavy Ind Ltd | Method and apparatus for heating resin sheet |
-
2013
- 2013-09-28 JP JP2013202826A patent/JP6258651B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51122171U (en) * | 1975-03-31 | 1976-10-04 | ||
| JPH05345363A (en) * | 1992-06-17 | 1993-12-27 | Sekisui Chem Co Ltd | Two-stage foam molding method and apparatus |
| JPH07132521A (en) * | 1993-05-28 | 1995-05-23 | Natl House Ind Co Ltd | Manufacture of heat insulating panel |
| JPH10202677A (en) * | 1997-01-27 | 1998-08-04 | Sanwa Kako Co Ltd | Heating type foaming machine with mold of variable vertical interval |
| JP2000280266A (en) * | 1999-03-29 | 2000-10-10 | Sharp Corp | Core material for thermal insulating material and its preparation and vacuum thermal insulating material |
| JP2001071334A (en) * | 1999-06-30 | 2001-03-21 | Sumitomo Heavy Ind Ltd | Method and apparatus for heating resin sheet |
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| JP6258651B2 (en) | 2018-01-10 |
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