JPS61121908A - Molding and mold for expanding crosslinking expandable composition - Google Patents
Molding and mold for expanding crosslinking expandable compositionInfo
- Publication number
- JPS61121908A JPS61121908A JP59244198A JP24419884A JPS61121908A JP S61121908 A JPS61121908 A JP S61121908A JP 59244198 A JP59244198 A JP 59244198A JP 24419884 A JP24419884 A JP 24419884A JP S61121908 A JPS61121908 A JP S61121908A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- composition
- air
- heating
- foaming
- 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.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 43
- 238000000465 moulding Methods 0.000 title claims description 8
- 238000004132 cross linking Methods 0.000 title abstract description 3
- 239000006260 foam Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000005187 foaming Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 abstract 3
- 238000000605 extraction Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
この発明は、架橋発泡性組成物をプレス装置による加圧
下で加熱した後、除圧して型外で自由発泡させることに
より、発泡体を成型する成型方法およびこの方法の実施
に使用する発泡用金型に関する。Detailed Description of the Invention Technical Field The present invention relates to a molding method for molding a foam by heating a cross-linked foamable composition under pressure using a press device, then removing the pressure and allowing free foaming outside the mold. The present invention relates to a foaming mold used to carry out the method.
従来技術
従来、架橋発泡性組成物をプレス装置による加圧下で加
熱した後、除圧して型外で自由発泡させることにより、
発泡体を得ようとする場合に、特に厚肉発泡体の成、形
においては、第１図に示すように、金型１，１′によっ
て形成された閉鎖された空所２内に架橋発泡性組成物３
を充填し、この組成物３を加熱した後、第２図に示すよ
うに、金型１，１′を分割して、開放すると、組成物３
は自由発泡を開始するが、この自由発泡が開始され発泡
体３′が金型ｌから離脱しようとする場合、金型１内で
発泡した部分が金型内に噛み込み、変形してしまうとい
う問題があり、またさらに金型１，１′によって形成さ
れた閉鎖された空所２内に組成物３を充填した際、この
空所２内に残留した空気が、加熱によって組成物３が溶
融する際、表面に気泡として含有され、発泡体３′の表
面が荒れ、製品価値の低下を来してしまうといつだ問題
も生じていた。Prior Art Conventionally, after heating a cross-linked foamable composition under pressure using a press device, the pressure is removed and the composition is allowed to freely foam outside the mold.
When trying to obtain a foam, especially in the formation and shaping of thick-walled foam, the cross-linked foam is placed in the closed cavity 2 formed by the molds 1 and 1', as shown in FIG. Sexual composition 3
After heating this composition 3, the molds 1 and 1' are divided and opened as shown in FIG. 2, and the composition 3 is heated.
starts free foaming, but when this free foaming starts and the foam 3' tries to separate from the mold 1, the foamed part in the mold 1 gets caught in the mold and becomes deformed. Furthermore, when the closed cavity 2 formed by the molds 1 and 1' is filled with the composition 3, the air remaining in the cavity 2 causes the composition 3 to melt due to heating. When this is done, a problem has always arisen when air bubbles are contained on the surface, causing the surface of the foam 3' to become rough and resulting in a decrease in product value.
目 的
この発明は、上記のよう々従来の架橋発泡性組成物を成
型する際に生じていた問題を解決するために為されたも
のであり、組成物が溶融する際、金型内に残留した空気
を含有して発泡体の表面が荒れるといった虞れがなく、
さらに組成物が自由発泡を行う際、発泡体が金型から容
易に離脱して、変形する虞れのない架橋発泡性組成物の
成形方法およびこの方法の実施に使用する金型を提供す
ることを目的とするものである。Purpose This invention was made in order to solve the problems that occurred when molding conventional crosslinked foamable compositions as described above. There is no risk that the surface of the foam will become rough due to the inclusion of air.
Furthermore, to provide a method for molding a crosslinked foamable composition in which there is no risk of the foam easily detaching from the mold and deforming when the composition is free-foamed, and a mold for use in carrying out this method. The purpose is to
構成
この発明は、架橋発泡性組成物を二分割金型を使用して
、加圧下で加熱した後、除圧して金型外で自由発泡させ
ることにより、発泡体を得る方法において、金型内の架
橋発泡性組成物が加熱によって膨脹し始める際、金型内
に封入された空気を、組成物の膨脹圧力により、金型に
形成された空気孔から外部に放出するとともに、加熱終
了後、金型を分割する際、空気孔を通して金型の内壁と
組成物との間に、圧縮空気を送り込むことを特徴とし、
また、二分割金型のそれぞれに、金型内部と連通された
弁室と、この弁室と金型の外部とを連通ずる空気孔と、
弁室内に配置され、架橋発泡性組成物の加熱時に一時的
に、かつ金型の分割時に作動させ、金型内部と空気孔と
を連通ずるようになっている弁体とを具えていることを
特徴とするものである。Structure This invention provides a method for obtaining a foam by heating a cross-linked foaming composition under pressure using a two-part mold, and then removing the pressure and allowing free foaming outside the mold. When the crosslinked foamable composition starts to expand by heating, the air sealed in the mold is released to the outside from the air holes formed in the mold due to the expansion pressure of the composition, and after heating is completed, When dividing the mold, compressed air is sent between the inner wall of the mold and the composition through the air holes,
Each of the two-part molds has a valve chamber communicating with the inside of the mold, and an air hole communicating the valve chamber with the outside of the mold.
The valve body is arranged in the valve chamber and is activated temporarily when the cross-linked foaming composition is heated and when the mold is divided, so as to communicate the inside of the mold with the air hole. It is characterized by:
次にこの発明を、第３および４図に示す実施例に基づい
てさらに詳しく説明を行う。Next, this invention will be explained in more detail based on the embodiment shown in FIGS. 3 and 4.
第３図において、一対の金型ｔ ｔ 、 ｉ ｔ’には
、それぞれ架橋発泡性組成物の充填用空所１２゜１２’
と、この空所１２ 、１２’と貫通孔１９ 、１９’に
よって連通される弁室１５ 、１５’と、この弁室１５
、１５’をそれぞれ金型１１ 、１１’の外部と連通
ずる空気孔１６ 、 ｔ ７ 、１６’ 、 １７′が
形成されている。そして弁室１５ ； １ ｓ’内には
、それぞれ弁体１’４．１４’が上下動自在に嵌入され
ており、この弁体１４ 、 ｌ ４’によって仕切られ
た弁室１５ 、１５’の空所１２．１２’側が空気孔１
６ 、１６’によって、他方側が空気孔１７゜１７′に
よってそれぞれ金型１１ 、 Ｌ １’の外部と連通さ
れるようになっている。そして空気孔１６゜１７ 、１
６’ 、 １７’の開開は、図示しない電磁弁によって
電気的に行われる。また弁室１５ 、１５’の開口部は
それぞれ押え板Ｌ ８ ’、 １８’によって密閉され
ている。In FIG. 3, a pair of molds t t and i t' each have a cavity 12° 12' for filling with a crosslinking foamable composition.
and the valve chambers 15 and 15' which are communicated with the cavities 12 and 12' through the through holes 19 and 19', and this valve chamber 15.
, 15' are formed with air holes 16, t7, 16', 17' which communicate with the outside of the molds 11, 11', respectively. Valve bodies 1'4 and 14' are fitted into the valve chambers 15; Air hole 1 is on the 12.12' side
6 and 16', the other side is communicated with the outside of the molds 11 and L1' through air holes 17 and 17', respectively. And air holes 16°17, 1
Opening and opening of 6' and 17' are performed electrically by solenoid valves (not shown). Further, the openings of the valve chambers 15 and 15' are sealed by presser plates L8' and 18', respectively.
次に上記金型による成型方法を説明すると、金型ｉ ｔ
、 ｔ ｉ’の充填用空所１２ 、 ｌ ２’に、予
備成型遅れた発泡性組成物１３を充填した後、金型１１
と１１’を互いに接合し、それぞれ空気孔１７ 、１７
’から圧縮空気を弁室１５ 、１５’内に送り込み弁体
１４ 、１４’で貫通孔１９ 、１９’を閉鎖すること
により、空所１２ 、 ｌ ２’内を密閉する。Next, to explain the molding method using the above mold, the mold it
, t i' are filled with the foamable composition 13 whose preforming has been delayed, and then the mold 11 is filled.
and 11' are joined to each other, and air holes 17 and 17 are connected to each other, respectively.
Compressed air is sent into the valve chambers 15, 15' from ', and the through holes 19, 19' are closed by the valve bodies 14, 14', thereby sealing the spaces 12, l2'.
この後金型１１ 、１１’を昇温し、金型内の発泡性組
成物１３を加圧下で加熱する。そして組成物１３の膨脹
が進行している段階で、空気孔１６ 、 ｔ ７．１６
′、 ｔ ７’を開放することにより、金型内の圧力が
上昇し始め、充填時に混入した空気が弁体１４ 、１４
’を押し上げ、空気孔１６゜１６′を通って大気に放出
され、これによって残留空気の空気抜きを行う。そして
この空気抜きが完了した後、空気孔１７ 、１７’から
弁室１５゜１５’内に圧縮空気を送り込み、弁体１４
、１４’により貫通孔１９ 、１９’を閉鎖し、金型内
を再び密閉する。Thereafter, the temperature of the molds 11 and 11' is raised, and the foamable composition 13 inside the molds is heated under pressure. Then, at a stage where the expansion of the composition 13 is progressing, the air hole 16, t 7.16
By opening ', t7', the pressure inside the mold begins to rise, and the air mixed in during filling is released into the valve bodies 14, 14.
' is pushed up and discharged to the atmosphere through the air holes 16 and 16', thereby venting the remaining air. After this air removal is completed, compressed air is sent into the valve chamber 15°15' from the air holes 17 and 17', and the valve body 14
, 14' close the through holes 19, 19', and seal the inside of the mold again.
加熱完了後除圧し、金型１１ 、１１’を開くｍ−前に
空気孔１７ 、１７’を大気に開放し、弁体１４ 、１
４’による貫通孔１９ ’、 １ ’９’の°閉鎖を解
除するとともに、空気孔１６ 、１６’から圧縮空気を
送り込む。この状態で金型１１ 、１１’を開放すると
、空所１２ 、 ｌ ２’と発泡体組成物１３との間に
、空気孔１６ 、１６’からの圧縮空気により空気膜が
形成され、発泡体組成物１３が空所１２ 、１２’内か
ら開放と同時に飛び出し、自由発泡により発泡体１３′
が形成される。After heating is completed, the pressure is removed, and before opening the molds 11, 11', the air holes 17, 17' are opened to the atmosphere, and the valve bodies 14, 1 are opened.
At the same time, the through holes 19' and 1'9' are released from closing by the air holes 16 and 16', and compressed air is sent in from the air holes 16 and 16'. When the molds 11, 11' are opened in this state, an air film is formed between the cavities 12, 12' and the foam composition 13 by compressed air from the air holes 16, 16', and the foam is The composition 13 jumps out from the cavities 12 and 12' at the same time as they are opened, and the foam 13' is formed by free foaming.
is formed.
なお、貫通孔１９ 、１９’の口径は、圧縮空気圧を約
５ｋｐ／ｃｒＩにすれば１朋程度で十分であるので、発
泡体１３′の外面に付く貫通孔１９ 、１９’の跡形は
、目立つことがない。Note that the diameter of the through holes 19 and 19' is sufficient if the compressed air pressure is approximately 5 kp/crI, so the traces of the through holes 19 and 19' on the outer surface of the foam 13' are not noticeable. Never.
第５図は、この発明の他の実施例を示す断面図であって
、加熱しながら徐々に混入空気を抜く場合は、弁体１４
、１４’を圧縮ばね２０，２０’で保持し、金型内部
と金型外部を連通したままで加熱し、混入空気が抜けた
後、空気孔１６゜１０′を閉鎖し空気孔１７ 、１７’
より圧縮空気を送り込み、金型内部を密閉する。加熱終
了後は前記実施例と同様である。FIG. 5 is a sectional view showing another embodiment of the present invention, and when the mixed air is gradually removed while heating, the valve body 14 is
, 14' are held by compression springs 20, 20', and the inside of the mold and the outside of the mold are heated while communicating with each other. After the mixed air is released, the air holes 16 and 10' are closed. '
Inject more compressed air to seal the inside of the mold. After the heating is completed, the process is the same as in the previous example.
この方法は、開放時間をタイマー等で設定することで可
能である。This method is possible by setting the open time using a timer or the like.
効果
以上のようにこの発明によれば、加熱途中において金型
内の残留空気を抜き取るので、発泡体組成物の表面への
空気の混入を防止することが出来、発泡体の表面を、空
所２，２′の内壁の面粗度まで平滑にすることが可能と
なり、商品価値の向上を図ることが出来るとともに、金
型を開放する際、金型と架橋発泡性組成物との間に圧縮
空気が送り込まれて空気膜が形成されるので、発泡性組
成物が金型から容易に離脱して、発泡体が変形する虞れ
が全くないという優れた効果を有するものである。Effects As described above, according to the present invention, residual air in the mold is removed during heating, so it is possible to prevent air from entering the surface of the foam composition, and to remove the air from the surface of the foam composition. It is possible to smooth the surface roughness of the inner walls of 2 and 2', improving the product value, and when opening the mold, there is no compression between the mold and the cross-linked foaming composition. Since air is introduced and an air film is formed, the foamable composition easily separates from the mold and has the excellent effect that there is no risk of deformation of the foam.
第１および２図は従来の架橋発泡性組成物の成形方法を
示す説明図、第３図はこの発明の一実施例を加熱状態時
において示す概略断面図、第４図は同実施例を自由発泡
時において示す概略断面図、第５図はこの考案の他の実
施例を示す概略断面図である。
１１ 、１１’・・・金型 １２．１２’・・・充
填用空所１３・・・架橋発泡性組成物 １３′・・・発
泡性１４ 、１４’・・・弁体 １５ 、１５
’・・・弁室１６ 、 ｌ ６’ 、 ｌ ７ 、１７
’・・・空気孔１９ 、１９’・・・貫通孔Figures 1 and 2 are explanatory diagrams showing a conventional method for molding a crosslinked foamable composition, Figure 3 is a schematic cross-sectional view showing an embodiment of the present invention in a heated state, and Figure 4 is a diagram showing the same embodiment in a free form. FIG. 5 is a schematic sectional view showing another embodiment of this invention. 11, 11'... Mold 12. 12'... Filling cavity 13... Cross-linked foamable composition 13'... Foamability 14, 14'... Valve body 15, 15
'...Valve chamber 16, l6', l7, 17
'...Air holes 19, 19'...Through holes
Claims (1)
加熱した後、除圧して金型外で自由発泡させることによ
り、発泡体を得る方法において、金型内の架橋発泡性組
成物が加熱によつて膨脹し始める際、金型内に封入され
た空気を、組成物の膨脹圧力により、金型に形成された
空気孔から外部に放出するとともに、加熱終了後、金型
を分割する際、空気孔を通して金型の内壁と組成物との
間に、圧縮空気を送り込むことを特徴とする架橋発泡性
組成物の成形方法。 ２、二分割金型のそれぞれに、金型内部と連通された弁
室と、この弁室と金型の外部とを連通する空気孔と、弁
室内に配置され、架橋発泡性組成物の加熱時に一時的に
、かつ金型の分割時に作動して、金型内部と空気孔とを
連通するようになつている弁体とを具えていることを特
徴とする架橋発泡性組成物の発泡用金型。[Claims] 1. A method for obtaining a foam by heating a cross-linked foamable composition under pressure using a two-part mold, and then removing the pressure and allowing free foaming outside the mold. When the crosslinked foamable composition in the mold begins to expand due to heating, the air enclosed in the mold is released from the air holes formed in the mold by the expansion pressure of the composition, and A method for molding a crosslinked foamable composition, which comprises feeding compressed air between the inner wall of the mold and the composition through air holes when dividing the mold after heating. 2. Each of the two-part mold has a valve chamber that communicates with the inside of the mold, an air hole that communicates this valve chamber with the outside of the mold, and a heating hole that is arranged inside the valve chamber and that is used to heat the crosslinked foaming composition. For foaming a cross-linked foaming composition, characterized by comprising a valve body which is activated sometimes temporarily and when the mold is divided to communicate the inside of the mold with the air holes. Mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59244198A JPS61121908A (en) | 1984-11-19 | 1984-11-19 | Molding and mold for expanding crosslinking expandable composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59244198A JPS61121908A (en) | 1984-11-19 | 1984-11-19 | Molding and mold for expanding crosslinking expandable composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61121908A true JPS61121908A (en) | 1986-06-09 |
Family
ID=17115233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59244198A Pending JPS61121908A (en) | 1984-11-19 | 1984-11-19 | Molding and mold for expanding crosslinking expandable composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61121908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08150626A (en) * | 1994-11-30 | 1996-06-11 | Natl House Ind Co Ltd | Manufacture of heat-insulating panel |
| CN1065471C (en) * | 1996-02-04 | 2001-05-09 | 池洪 | Heat accumulating type mould compression molding drying process and mould thereof |
-
1984
- 1984-11-19 JP JP59244198A patent/JPS61121908A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08150626A (en) * | 1994-11-30 | 1996-06-11 | Natl House Ind Co Ltd | Manufacture of heat-insulating panel |
| CN1065471C (en) * | 1996-02-04 | 2001-05-09 | 池洪 | Heat accumulating type mould compression molding drying process and mould thereof |
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