201103727 六、發明說明： 【發明所屬之技術領域】 本發明是有關一種在對填充於模具内的預備發泡粒 子等發泡性樹脂粒子進行加熱使其發泡而得到成形品的發 泡形成裝置中，在取出成形品之前用於對模具進行冷卻的 冷卻裝置。 【先前技術】 發泡成形裝置構成為在固定模板（die plate)和移動 模板上分別安裝模具安裝架，向該模具安裝架内的蒸汽室 送入蒸汽，對填充在模具内的預備發泡粒子等發泡性樹脂 粒子進行加熱使其發泡，由此進行發泡成形，在發泡成形 後，從配置在蒸汽室内的冷卻管將冷卻水喷射向模具進行 冷卻，然後，開模取出成形品，另外，在發泡成形不同的 産品的情況下，發泡成形裝置構成為在從模板取出模具安 裝架後，進行所謂的外部處理作業，即撤去在上述模具安 裝架上安裝的模具，與對應於該産品形狀的模具進行更換。 該外部處理作業並不是簡單地相對於模具安裝架裝 卸模具，而是進行對模具安裝架上附帶的襯墊（packing ) 類等的零件進行維護更換、進行模具的清掃、進行在模具 安裝架内配置的一般由銅管製成的冷卻管的配置狀態的調 整作業、進行不良部位的修理作業等，需要花費很多工時， 該作業的品質對産品的品質會帶來很大的影響。 另外，模具為了防止因加熱成形時的内壓所造成的變 形，在其背面設置突出支柱，並使該支柱卡止在固定於模 4 321272 201103727 具安裝架的背面開口端上的後板（back plate )上，因此， 在將冷卻管配置在模具安裝架内的情況下，需要一邊避開 上述支柱的配置位置，一邊進行配置，而且，在配置完該 冷卻管後，將後板安裝在模具安裝架上時，還必須注意一 邊用該後板和支柱挾住冷卻管，一邊進行後板的安裝作 業，該後板的裝卸作業所需時間相對於外部處理作業所需 時間所占有之比率變大，模具更換作業的效率會顯著下降。 進而，構成模具冷卻裝置的上述冷卻管的主要目的， 在於對模具全面進行均勻的水冷，但為了達成該目的，現 狀是例如在固定於模具安裝架内且在各種模具共同使用的 彎曲自如之冷卻管的情況下，於卸下後板時，對應於在模 具安裝架内安裝的模具大小或形狀等，操作者根據經驗和 直覺進行冷卻管的彎曲調整。 另一方面，為了對應於更換的模具而始終能夠進行均 勻之冷卻，還公知一種在每個模具上採用專用的冷卻管的 發泡成形裝置中的模具冷卻裝置。例如，在專利文獻1所 述的模具冷卻裝置中，記載有一種冷卻機構，其構成為沿 著在模具安裝架内安裝的模具背面形狀，在蒸汽室内配置 冷卻管和送氣管並交替進行來自冷卻管的水冷和來自送氣 管的風冷，在專利文獻2所述的發泡成形裝置中，揭示一 種冷卻裝置，其在蒸汽室内具備冷卻模具背面的冷卻管和 冷卻模具的周圍壁上的冷卻管。 但是，雖然上述任一個裝置都具有能夠均勻地冷卻模 具的效果，但是根據前者的冷卻機構，由於在蒸汽室内即 5 321272 201103727 配置冷卻管又配置送氣管，所以上述外部處理作業變得更 繁瑣，根據後者的冷卻機構，在每次更換模具時必須對應 該模具的形狀而將冷卻管立體地配置在蒸汽室内，存在著 冷卻管的更換或調整作業需要費很大之勞力問題。 進而，在任一個裝置中，在更換模具時必須卸下後 板，一邊避開模具的支柱安裝位置等一邊對應模具的形狀 等將冷卻管配置在模具安裝架内，如上所述，該後板的裝 卸作業所需時間占外部處理作業所需時間的比率變大，存 在模具更換的作業效率下降的問題。 專利文獻1:日本特開昭59— 78819號公報 專利文獻2:日本特開2003 —71845號公報 【發明内容】 本發明是有鑒於上述問題點而提出，其目的在於提供 一種發泡成形裝置中的模具冷卻裝置，其在更換模具時， 不需要進行用來調整冷卻管在模具安裝架内的配置之後板 的裝卸作業，在不進行冷卻管的配置調整的情況下能夠有 效地進行模具的更換作業，並且不受模具的支柱的配置部 位的影響就能夠冷卻模具。 (發明欲解決之課題） 為了達成上述目的，本發明的發泡成形裝置中的模具 冷卻裝置的特徵在於，所述發泡成形裝置具備： 模具，以裝卸自如的方式組裝在模具安裝架内； 後板，安裝在模具安裝架的背面侧的開口端，並卡止 在上述模具的背面突出設置的支柱；以及 6 321272 201103727 蒸汽室，由上述後板和模具背面之間的空間部形成； -在上述後板的與模具背面相對的面上，設有複數條管 _ 收納槽，在這些管收納槽中收納冷卻管，上述冷卻管上設 有多個朝向模具背面開口的噴出孔。 在如此構成的發泡成形裝置中的模具冷卻裝置中，可 以構成為如下：上述後板的管收納槽内收納的冷卻管，包 括冷卻主管和沿該冷卻主管的長度方向每隔固定間隔並排 的多根冷卻支管，使這些冷卻支管形成為相對於冷卻主管 的長度方向形成直角方向的狀態，使冷卻支管的一端部與 冷卻主管連通，將冷卻支管的另一端部密封。 另一方面，也可以構成為如下的構造：在上述後板的 管收納槽内收納的冷卻管，包括冷卻主管和複數根冷卻支 管，該冷卻主管折曲形成字形，該複數根冷卻支管是在 該冷卻主管的相互平行的兩側主管部之間，沿該兩側主管 部的長度方向每隔固定間隔並排，並使這些冷卻支管的兩 端部與上述兩側主管部連通。 另外，在上述發泡成形裝置中的模具冷卻裝置中，其 特徵在於，將在上述冷卻主管上安裝的軟管連接用短管通 過在模具安裝架上設置的插通孔，突出到外部，進而，其 特徵在於5將在上述後板上設置成並列狀態的各官收納槽 的槽寬，形成為卡止在後板上的模具支柱的端面直徑1 /2 以下之寬度。 (發明效果） 根據本發明，由於在模具安裝架的後板上設置複數條 7 321272 201103727 管收納槽，並在此管收納槽中收納設有朝向模具背面開口 的多個喷出孔的冷卻管，因此，在模具更換時，卸下後板 不需要具有如一邊避開該模具的支柱一邊進行冷卻管的配 置調整般的熟練技術配管作業，能夠提供一種使模具支柱 確實卡止在後板上並能夠利用在設置於該後板上的管收納 槽内收納的冷卻管來冷卻更換後的模具之模具冷卻裝置。 如此，由於可以不需要卸下後板的作業，所以能夠大 幅度削減包括模具更換作業在内之外部處理作業的工時， 此外，能夠從在後板上設置的複數條管收納槽内配置的冷 卻管之管壁上貫穿設置的多個喷出孔有效地將冷卻水喷射 到模具上，所以能夠提高模具的冷卻效果。 進而，在後板的管收納槽内收納的上述冷卻管，係由 冷卻主管和在該冷卻主管的長度方向上每隔固定間隔並列 的複數根冷卻支管構成，使這些冷卻支管相對於冷卻主管 的長度方向形成朝向直角方向的狀態，使冷卻支管的一端 部與冷卻主管連通，將冷卻支管的另一端部密封，在具有 這種配管結構的情況下，不言而喻能夠以簡單的構造容易 且正確地將冷卻管配置在後板上與各個管對應的管收納槽 内，還能夠將供給到冷卻主管的冷卻水，均等地分流向並 列的全部冷卻支管，並從在這些冷卻支管的管壁上貫穿設 置的多個喷出孔向模具整體均等地喷射冷卻水，可以有效 地進行冷卻。 在後板的管收納槽内收納的冷卻管，係由折曲形成〕 字狀的冷卻主管和在該冷卻主管的相互平行的兩側主管部 8 321272 201103727 之間’沿該兩側主嘗部的長度方向每隔固定間隔並排數根 - 冷卻支管之結構，使這些冷卻支管的兩端部與上述兩側主 _ 管部連通的情况下，能够將通過冷卻主管供給的冷卻水從 這些並列的冷卻支管均句地喷射向模具。 另外，軟管連接用短管安裝在上述冷卻管的冷卻主體 上，使該軟管連接用短管通過設置在模具安裝架上的插通 孔而突出的外部的情況下，能夠從裝置外將將冷卻水供給 軟管簡單地連接於該軟管連接用短管，通過該連接，能夠 構成達到在後板上配置的上述冷卻管的冷卻水供給管路。 在上述後板上設置成並列狀態的各管收納槽的槽寬 形成為卡止在後板上的模具支柱的端面直徑的1/2以下寬 度的情況，在更換模具時，即使該模具支柱的突出端面位 於後板的管收納槽上，也能夠將該突出端面的大部分卡止 在管收納槽周圍的後板面上，因此，能夠構成始終以穩定 狀態將支柱支承在後板上的模具安裝構造。 此時，當在管收納槽内收納的冷卻支管的外徑，形成 比管收納槽的深度大的直徑時，雖然産生該冷卻支管的周 壁的一部分從管收納槽突出而阻止模具支柱的端面抵接於 後板的狀況，但只要利用.能夠壓塌變形的管形成冷卻支 管，即使模具支柱的端面位於管收納槽上，也能夠一邊壓 塌從管收納槽突出的冷卻支管的突出周壁部，一邊使冷卻 支管沒入管收納槽内而使模具支柱的端面抵接、卡止在後 板上。 【實施方式】 9 321272 201103727 面’結合_說明本發明的具體實施形態，第ι圖 =平方向進行開模的方式構成的發泡成形裝置的主 =刀=H則面圖，發泡成形裝置具有顧^ :如相，，在所述模具安裝架㈣ 的對向開口端部，分 的陽模2八以及且古 方絲入具有凸部2a 2β , 八有凹部2b的陰模2Β，在此陽、陰模2Α、 '、4 2a和凹部2b之間’形成有腔（成形空間）3。 八^而’在上述模具安裝架1^⑺的背面側的開口端， I拓於開口端以裝卸自如的方式安襄有將該開口端密封 々矩形後板4' 4,利關具安錢1Α、ΐβ_這些後板 4、4的内表面和陽模、怜槿 ？ Λ, ,b 空間部m… 之A、28的背面間的密閉 ^ 乂成^飞至5，能夠向該蒸汽室5從外部通過蒸汽 未圖示）仏給加熱成形用的蒸汽，並且使在陽模2 a、 =模2B的背面朝向後板4、4突出設置的複數根支柱6的 突出端面6a卡止在與陽模2A、陰模2B的背面對向的後 板4、4的上述内表面上。 另卜在這些後板4、4的内表面分別裝配陽、陰模 2A 2B的冷部裝置。該模具冷卻裝置有如下之結構：在 後=4的内表面上設置在一定間隔平行並列的複數條筆直 的官收納槽7，在這些管收納槽7内，收納朝向相對的模 具背面喷射冷卻水的冷卻管8。 根據表示一方模具安襞架1A側的一例的第2圖、第 3圖詳細說明該模具冷卻裝置的構造時，第2圖是其分解 斜面圖，第3圖是具備冷卻管的後板的斜面圖，在後板4 321272 10 201103727 的與陽模2A背面相對的内表面上，在水平方向 定間隔，刻設有複數條相互平行的管收納槽7、7.··7，所 -述管收納槽的上下端形成到後板4的上下端緣附近部且所 ，管收納槽在上下方向上呈長的筆直狀，另_方面，冷卻 Ή系由冷卻主管8a和複數根冷卻支管8b所構成，冷卻 主官8a的長度為形成比後板4的橫幅稍短’複數根冷卻支 官8b在該冷卻主管8a的長度方向上，每隔與上述管收納 槽7、7間的間隔相同間隔並列，在如下狀態下順次連接 成冷卻管8，印，使上述冷卻主管8a朝向水平方向，在該 冷卻主管8&的管壁下周面上’使朝向垂直方向的上述複數 根冷部支管8D的上端部與冷卻主管^内連通的狀態。 ㈣，與冷卻主管8a連結、連通的所有冷卻支管肋 :上端部係從上端向後板4的内表面側彎曲，經由該上端 3曲部8b’ ’冷卻支管8b係對冷卻主管^成直角向下方 垂下=且，、冷卻支管8b的長度與上述管㈣槽7的長度 大致相等，並形成能约收納在管收納槽7内。 =此在使複數根冷卻支f8b的上端與冷卻主管 :、連通並騎冷卻主f 8a料些冷卻支管处垂下 簾子狀而成的冷卻管8中，將冷卻主管⑽著後板4的上 上水平配置，並且，如第4圖所示，將 f部支r8b經由其上端彎曲部⑽以能夠卸下的方式收 二中5列设置在後板4上的複數條管收納槽7、7... 7中㈣内’由此’構成模具冷卻裝置。 上述各官收納槽7的槽寬係形成為:在上述模具支柱 321272 11 201103727 6的犬出端面6a的直徑二分之一以下、且與冷卻支管外 的^徑相等或比冷卻支管8b的外徑稍寬的寬度，並且上述 各管收納槽7的深度係形成為與冷卻支管訃的外徑相等或 比冷部支官8b的外徑稍深的尺寸，之後，將冷卻支管扑 整體收納成埋設狀態’但是在冷卻支管8b是如銅管般能夠 壓潰變形的情況，只要預先使其深度比該冷卻支管此的外 徑淺即可。在這些所有的冷卻支管8b上，在從管收納槽7 朝向模具的背面管壁部分，在長度方向，即在上下方向每 個小間隔有貫穿設置貫穿管壁的多數冷卻水喷出孔9、9... 9，並且下端係如第5圖所示，被能夠裝卸的蓋部件μ蓋 藉由卸下該蓋部件14能夠確實地清洗管内等。同時， 杈具支枝6的突出端面6a的直徑是指能夠包圍突出端面 6a的最小直徑的正圓直徑。 這些冷卻水噴出孔9的直徑如果小時，則有冷卻水中 ”雜質會堵塞住孔口的疑慮，而且貫穿設置如此小 仏孔疋比較困難，另一方面，如果冷卻水喷出孔9的直徑 大時’則报難維持冷卻支管8b内的上端部和下端部的 相等，因此，以〇.5至丨5mm為佳。 、進而’在所有冷卻支管8b貫穿設置的冷卻水噴出孔9 的總開孔面積以設為冷卻主管8a内的f路剖面面積的Μ 倍，舱確保必要的水量，並且可確實維持元壓為佳。 +此外，在各冷卻支管8b中，關於貫穿設置的冷卻水 、9間的間隔，在從冷卻支管8b的上端起算與該 7支官8b的長度的3〇%相當的長度部分中，將上述間 321272 12 201103727 隔設為2〇mm的間隔使冷卻水喷出孔9的配置密度變密， *而與上述相比在相當於下方的70%的長度部分中，每隔 ' 50_間隔貫穿設置冷卻水噴出孔9,使冷卻水噴出孔9 的配置密度變稀疏，通過如此之構成，不會因噴射到陽模 2A、陰_ 2㈣上部的冷卻水流下而使模具下部變成過冷 部。同時，所有的冷卻水噴出孔9係被貫穿設置成稍微朝 向斜上方的狀態噴出冷卻水。 另一方面，在冷卻主管8a上沒有設置冷卻水喷出孔， 而是成為使其内部流通的冷卻水均等分流向所有的冷卻支 管肋之結構，並且在該冷卻主管㈣管壁上周部朝向上 方突出設置有兩根（也可以是三根以上）軟管連接用短管 10、10,軟管連接用短管1Q、1G相隔所定間隔，並且它 下端與管内連通。在上述模具安裝架ia的上側框部，在 左右方向上相隔與所述軟管連接用短管1〇、1〇的間隔相同 的間隔貫穿設置有插通孔n、u，分別隔著密封襯塾（未 圖示）將所述軟管連接用短管1〇、1〇以不透水的方式插通 在插通孔11、1〗中，並在從模具安裝架1A突出的上端部 連接冷卻水供給軟管〗2、〗2。 另外’作為將後板4以裝卸自如的方式安裝在模且 裝架Μ上的手段，可以採用如下手段：在該後^、的外 周部複數個部位設置螺栓安裝孔，另一方面，在模具安裝 架1Α的背面側開口端面設置螺紋孔，在該螺紋孔中、摔二 通過螺栓安裳孔而插入的螺栓13，但也可以採用其他 段0 321272 5 13 201103727 另外’在另一方的模具安裝架1B側，也與上述同樣 在其後板4内表面刻設有複數條相互平行的管收納槽7， 管收納槽7具有與上述相同的構造，並且在上下方向上 長，在左右方向上每隔一定間隔刻設管收納槽7，另一方 面，在這些管收納槽7令收納冷卻支管8b，使得在冷卻支 g 8b的官壁上設置的多個冷卻水噴出孔9朝向陰模的 者面從而收納成埋設狀態，並且使這些冷卻支管的上端 弩曲部8b’的上端部，在冷卻主管8a的長度方向以每隔一 疋間隔與冷部主言8a連結、連通，通過將這樣的冷卻主管 8a沿後板4的上端部内表面配置在水平方向上，構成具有 與上述相同結構的模具冷卻裝置，將在冷卻主管仏安裝的 兩根軟管連接用短管10、1〇，以不透水地插通在設置於模 具安裝架1B上側框部的插通孔u、n中，在從模具安裝 采1B犬出的突出端部連接冷卻水供給軟管I〗、I〕。 上述左右一對的模具安裴架1A、1B分別以裝卸自如 的方式安裝在固定模板和可純板上，在發喊形時，如 習知那樣，在合模後，利用陽模2A的凸部2a和陰模 ，凹部2b形成腔3,在腔3内填充預備發泡粒子等發泡性 樹脂粒子，之後，供給蒸汽到蒸汽室5、5並加熱，使其二 次發泡，然後，通過冷卻水軟管12供給冷卻水到冷卻管8 的冷卻主f 8a ’從冷卻H 8a使冷卻水分流職板4、4 的管收納槽7内收納的複數根冷卻支管訃中，從這些冷卻 支管8b的冷卻水嘴出孔9向陽模从、陰模⑸喷射^卻 水’由此進行冷卻，使用後的冷卻水#通過與模具安裝架 321272 14 201103727 1A、1B的下侧框部連結、連通的排出口 15排出後，開模， - 取出發泡成形品。 • .而且，發泡性樹脂粒子是在合成樹脂粒子含浸物理型 發泡劑，藉由加熱而發泡的粒子，也含有預備發泡而成的 預備發泡粒子。同時，在本申請發明中，主要是使用預備 發泡的、所謂的預備發泡粒子。 作為構成上述發泡性樹脂粒子的合成樹脂者，例如有 聚苯乙烯、耐衝擊性聚苯乙烯（hlgh impact㈣购職）、 苯乙烯-乙烯共聚物、苯乙烯改質聚乙烯系樹脂' 苯乙烯 -馬來酸酐共聚物、苯乙稀-丙稀腈共聚物等聚苯乙稀系 樹脂’聚乙烯、聚丙烯、乙烯—醋酸乙烯酯共聚物等聚婦 烴系樹脂，聚對苯二甲酸乙二酯等聚酯系樹脂等。 而且，作為上述物理型發泡劑者，例如有丙烷'丁烷、 戊烷、己烷等脂肪族烴類；環戊烷、環丁烷等脂肪族環化 氫類；三氯氟甲烷、二氯二氟甲烷、二氣四氟甲烷、三氯 三氟乙烷、氯代甲烷、二氯甲烷、氯代乙烷等鹵化烴類等。 另外，在進行模具的更換時，從左右一對的模具安裝 架ΙΑ、1B將陽模2A、陰模2B卸下後，只要將新的陽模 2A、陰模2B安裝在所述模具安裝架1A、]B上即可。此 時，不用從模具安裝架ΙΑ、1B上卸下具有冷卻管8的後 板4、4，將在所述後板4、4上設置的冷卻管8作為該模 具的冷卻裝置就直接使用，利用後板4、4的内表面卡止新 更換的模具支柱6的端面，因此，可以不必進行需要一定 熟練度的冷卻管的配管作業、後板4的裝卸作業等外部處 321272 15 201103727 理作業，能夠有效率地且碓實地進行模具更換。 關於在卡止模具支柱6端面之後板4的内表面設置上 述管收納槽7的深度，在冷卻支管8b是如鋼管般能夠壓潰 變形時，如第6圖所示，可以使所述深度比該冷卻支管訃 的外徑淺，在使冷卻主管8a的管壁之一部分從後板4的内 表面向崧汽至5内突出的狀態下進行收納。在這樣構成的 後板4的官收納槽7上，模具支柱6相對向地壓接在端面 從該管收納槽7突出的冷卻支管肋時，利用其壓力將該管 收納槽7的管壁壓塌，如第7圖所示，一邊塑性變形為剖 面橫長橢圓形狀，一邊沒入管收納槽7内，可以使模具支 柱6的端面確實地抵接、卡止於後板4的内表面。 第8圖表示本發明的模具冷卻裝置的其他實施形態 者，在上述實施形態中，使冷卻支管8b在朝向垂直方向的 狀態下，雖在左右方向上並列，但在該實施形態中，形成 的構造是將冷卻支管8b在朝向水平方向的狀態在上下方 向每隔一定間隔並列設置。 具體地說，冷卻管的冷卻主管8a，具有水平冷卻主管 部8al和兩側主管部8a2、8a2，在水平冷卻主管部8&ι的 兩端4朝向下方呈直角地折曲而形成該兩側主管部8a2、 8a2將水平冷卻主管部8ai和兩側主管部、sc設置 ^-體而構成冷卻主管8a，所以冷卻主管8a形成為“口” 字狀，在該冷卻主管部8al上兩側主管部8a2、8a2之間， ，上下方向每隔一定間隔配置有並列狀態的複數根冷卻支 s 8b，使廷些冷卻支管8b的兩端與兩側主管部、Μ] 321272 16 201103727 連結、連通，另-方面，在後板4的内表面上，以在上下 .方向並列狀態，每隔與上述冷卻支管8b的間隔相同的間隔 .収有在水平方向筆直的管收納槽7，，管收納槽7,具有兩 端形成到該後板4的兩側端附近部的長度，使形成為“〕” 字狀的冷卻主管8a的水平冷卻主管部Μ與兩側主管部 8a2、8a2形成為從後板4的内表面的上端部沿著兩侧端部 的狀悲，將所有的冷卻支管8b以能狗卸下的方式收 複數條管收納槽7，'7，.·.7’中對應的管收 騎可能裝卸之收納、固定，從而構成模具冷 内表:二:斤有:冷卻支管8b的两端部係朝向後板4的 =表面側夸曲，4目對於沿著後板4的内表面上配設的“〕，， 子狀的冷卻主管8a，將所有的冷卻支管扑介由里兩端響 曲部8b’、8b，收納到管收納槽7，、7，.,. 向的管壁上，在其長度方向上每 置二I喷出但也可以在冷卻主管…設 8a的水平冷卻主管部8ai的管壁周圍 可以p裝置㈣，朝向上方突出設有兩根（也 疋二根以上）的軟管連接用短管10、1G，此軟管連接 =〗〇、π)在水平冷卻主管部8al的 向）上相隔規定的n 、五石力 内部連通。在模具該水平冷卻主管部8ai 方向上相隔與所的上側框部，在左右 权s連接用短管10、10的間隔相同的間 321272 17 201103727 隔貫穿設置有插通孔11、11，分別隔著密封襯墊（未圖示） 將所述軟管連接用短管10、10以不透水的方式插通在插通 孔11、11中，並在從模具安裝架ΙΑ ( 1B)突出的上端部 上連接冷卻水供給軟管12、12。 具備這樣構成的模具冷卻裝置的左右一對模具安裝 架ΙΑ、1B，係在模具更換時與上述模具的冷卻裝置同樣， 預先設置成不需要從模具安裝架ΙΑ、1B上卸下而安裝的 狀態，利用後板4、4的内表面卡止新更換的模具支柱6 的端面。 而且，上述冷卻主管8a、冷卻支管8b的直徑，或在 冷卻支管8 b貫穿設置的冷卻水喷出孔9的直徑等與上述實 施形態相同，但冷卻水喷出孔9的貫穿設置的間距係相對 於管的長度方向以一定間隔設置，另一方面，在相當於整 體根數的30%的上部並設的複數根冷卻支管8b中，減小 冷卻水噴出孔9的貫穿設置的間距，在相當於整體根數的 70%的下部並設的複數根冷卻支管8b中，使冷卻水喷出孔 9的貫穿設置的間距大於上述上部側的冷卻水喷出孔9的 貫穿設置間距，使得不會因為向陽模2A、陰模2B的上部 喷射的冷卻水流下造成模具下部過冷卻。另外，所有的冷 卻水喷出孔9係以被貫穿設置成將冷卻水以稍微朝向斜上 方的狀態喷出為佳。 進而，在以上任一種實施形態中，表示將管收納槽7、 7’直接設置在後板4的内表面的形態，但也可以構成如第 9圖所示，在後板4的内表面黏貼具有一定厚度的内襯材 18 321272 201103727 4’，在該内襯材4’上設置管收納槽7、7’，並且卡止模具 -支柱6的突出端面。 ，在上述模具冷卻裝置中，雖然說明對於在模具安裝架 ΙΑ、1B的開口端以裝卸自如的方式安裝後板4、4，在所 述後板4、4的雙方的内表面上設置管收納槽7、7’，在這 些管收納槽7、7 ’内收納冷卻管的情形，但是也可以在模 具安裝架1A、1B的開口端以裝卸自如的方式安裝後板4、 4，在所述後板4、4中的任一個後板4的内表面設置管收 納槽7、7’，在這些管收納槽7、7’内收納冷卻管。 【圖式簡單說明】 第1圖是發泡成形裝置的主要部分的縱剖側面圖； 第2圖是模具冷卻裝置的分解立體圖； 第3圖是具有冷卻管的後板斜面圖； 第4圖是其一部分的放大橫剖面圖； 第5圖是具備模具冷卻裝置的模具安裝架的背面側放 大縱剖側面圖； 第6圖是在淺的管收納槽内收納冷卻支管狀態的局部 剖面圖； 第7圖是在其槽上卡止模具支柱狀態的剖面圖； 第8圖表示模具冷卻裝置的其他形式的分解斜面圖； 第9圖在後板的内襯材設置管收納槽狀態的縱剖侧面 圖。 【主要元件符號說明】 ΙΑ、1B模具安裝架 19 321272 陽模 陰模 腔 後板 内襯材 蒸汽室 支柱 突出端面 管收納槽 管收納槽 冷卻管 冷卻主管 水平冷卻主管部 兩側主管部 冷卻支管 彎曲部 冷卻水噴出孔 軟管連接用短管 插通孔 冷卻水軟管 螺栓 蓋部件 排出口 20 321272[Technical Field] [Technical Field] The present invention relates to a foam forming apparatus which is obtained by heating and foaming foamable resin particles such as preliminary expanded particles filled in a mold to obtain a molded article. A cooling device for cooling a mold before taking out the molded article. [Prior Art] The foam molding apparatus is configured to respectively mount a mold mounting frame on a die plate and a moving die plate, and supply steam to the steam chamber in the die mounting frame to prepare preliminary foamed particles filled in the mold. The foaming resin particles are heated and foamed to perform foam molding, and after the foam molding, the cooling water is sprayed onto the mold from a cooling pipe disposed in the steam chamber, and then cooled, and then the molded article is taken out by mold opening. Further, in the case of foaming and molding different products, the foam molding apparatus is configured to perform a so-called external processing operation after removing the mold mounting frame from the template, that is, to remove the mold attached to the mold mounting frame, and correspondingly Replace the mold in the shape of the product. This external processing operation does not simply attach and detach the mold to the mold mounting frame, but performs maintenance and replacement of parts such as packing attached to the mold mounting frame, cleaning the mold, and performing the mold mounting. It is necessary to spend a lot of man-hours in the adjustment of the arrangement state of the cooling pipes made of copper pipes and the repair work of defective parts, and the quality of the work has a great influence on the quality of the products. Further, in order to prevent deformation due to internal pressure during heat forming, the mold is provided with a projecting pillar on the back surface thereof, and the pillar is locked to a rear plate (back) fixed to the back end of the die of the mold 4321272201103727. In the case of disposing the cooling pipe in the mold mounting frame, it is necessary to arrange the cooling pipe while avoiding the arrangement position of the pillars, and after the cooling pipe is disposed, the rear plate is mounted on the mold. When installing the frame, it is also necessary to pay attention to the installation of the rear plate while holding the cooling pipe with the rear plate and the pillar, and the time required for the loading and unloading operation of the rear plate is changed relative to the time required for the external processing operation. Large, the efficiency of mold replacement operations will be significantly reduced. Further, the main purpose of the cooling pipe constituting the mold cooling device is to uniformly perform uniform water cooling on the mold. However, in order to achieve the object, the present invention is, for example, a bending freely fixed in a mold mounting frame and used in combination with various molds. In the case of the tube, when the rear plate is removed, the operator adjusts the bending of the cooling tube based on experience and intuition, corresponding to the size or shape of the mold mounted in the mold mounting. On the other hand, in order to perform uniform cooling in accordance with the replaced mold, a mold cooling device in a foam molding apparatus in which a dedicated cooling pipe is used for each mold is also known. For example, in the mold cooling device described in Patent Document 1, there is described a cooling mechanism configured to arrange a cooling pipe and an air supply pipe in a steam chamber along a shape of a back surface of a mold mounted in a mold mounting frame, and alternately perform cooling from the mold. In the foam molding apparatus described in Patent Document 2, a cooling device is disclosed in which a cooling pipe for cooling the back surface of the mold and a cooling pipe on the peripheral wall of the cooling mold are provided in the steam chamber. . However, although any of the above-described devices has an effect of being able to uniformly cool the mold, according to the former cooling mechanism, since the air supply pipe is disposed in the steam chamber, that is, 5321272 201103727, the external processing work becomes more complicated. According to the latter cooling mechanism, it is necessary to arrange the cooling pipe three-dimensionally in the steam chamber every time the mold is changed, and there is a problem in that the replacement or adjustment work of the cooling pipe requires a lot of labor. Further, in any of the apparatuses, the rear plate must be removed when the mold is replaced, and the cooling pipe is placed in the mold mounting frame in accordance with the shape of the mold or the like while avoiding the pillar mounting position of the mold, etc., as described above, the rear plate is The ratio of the time required for loading and unloading operations to the time required for external processing operations is increased, and there is a problem that the work efficiency of mold replacement is lowered. The present invention has been made in view of the above problems, and an object of the invention is to provide a foam molding apparatus. The mold cooling device does not need to perform the loading and unloading operation of the plate after adjusting the arrangement of the cooling pipe in the mold mounting frame, and can effectively replace the mold without adjusting the arrangement of the cooling pipe. The mold can be cooled without being affected by the arrangement of the pillars of the mold. In order to achieve the above object, a mold cooling device in a foam molding apparatus according to the present invention is characterized in that the foam molding apparatus includes a mold that is detachably assembled in a mold mounting frame; a rear plate, which is mounted on the open end of the back side of the mold mounting bracket, and is locked with a pillar protrudingly provided on the back surface of the mold; and a 321272 201103727 steam chamber formed by a space portion between the rear plate and the back surface of the mold; A plurality of tubes _ accommodating grooves are provided on a surface of the rear plate facing the back surface of the mold, and the cooling tubes are housed in the tube accommodating grooves, and the cooling tubes are provided with a plurality of discharge holes that open toward the back surface of the mold. In the mold cooling device in the foam molding apparatus configured as described above, the cooling pipe accommodated in the pipe storage groove of the rear plate may include a cooling main pipe and a side by side at regular intervals along the longitudinal direction of the cooling main pipe. The plurality of cooling branch pipes are formed such that the cooling branch pipes are formed in a direction perpendicular to the longitudinal direction of the cooling main pipe, and one end portion of the cooling branch pipe communicates with the cooling main pipe, and the other end portion of the cooling branch pipe is sealed. On the other hand, the cooling pipe accommodated in the pipe storage groove of the rear plate may include a cooling main pipe and a plurality of cooling branch pipes, and the cooling main pipe may be bent to form a zigzag shape, and the plurality of cooling branch pipes are The mutually parallel side main pipe portions of the cooling main pipe are arranged at regular intervals along the longitudinal direction of the both main pipe main portions, and both end portions of the cooling branch pipes are communicated with the both side main pipe portions. Further, in the mold cooling device of the above-described foam molding apparatus, the hose connecting short pipe attached to the cooling main pipe is protruded to the outside through an insertion hole provided in the mold mounting frame, and further It is characterized in that the groove width of each of the main storage grooves which are arranged in parallel on the rear plate is formed to have a width of an end face diameter of the mold post that is locked on the rear plate of 1 /2 or less. (Effect of the Invention) According to the present invention, a plurality of 7 321272 201103727 tube housing grooves are provided on the rear plate of the mold mounting frame, and a cooling tube having a plurality of discharge holes opening toward the back surface of the mold is accommodated in the tube housing groove. Therefore, when the mold is replaced, the removal of the rear plate does not require a skilled piping operation such as adjustment of the arrangement of the cooling tubes while avoiding the pillars of the mold, and it is possible to provide a mold post that is surely locked to the rear plate. Further, the mold cooling device for cooling the replaced mold can be cooled by a cooling pipe housed in the tube housing groove provided on the rear plate. In this way, since it is not necessary to remove the operation of the rear plate, it is possible to greatly reduce the number of man-hours for external processing operations including the mold replacement work, and it is also possible to arrange from a plurality of tube storage grooves provided on the rear plate. The plurality of discharge holes provided in the pipe wall of the cooling pipe effectively spray the cooling water onto the mold, so that the cooling effect of the mold can be improved. Further, the cooling pipe housed in the pipe storage groove of the rear plate is composed of a cooling main pipe and a plurality of cooling branch pipes arranged at regular intervals in the longitudinal direction of the cooling main pipe, and the cooling branch pipes are opposed to the cooling main pipe. The longitudinal direction is formed in a state of being oriented in a right angle direction, and one end portion of the cooling branch pipe is communicated with the cooling main pipe, and the other end portion of the cooling branch pipe is sealed. When such a pipe structure is provided, it is self-evident that it is easy to have a simple structure. Correctly arranging the cooling pipes in the pipe receiving grooves corresponding to the respective pipes on the rear plate, and equally distributing the cooling water supplied to the cooling main pipe to all the cooling branch pipes in parallel, and from the pipe wall of the cooling branch pipes The plurality of discharge holes provided therethrough are uniformly sprayed with cooling water to the entire mold, so that cooling can be performed efficiently. The cooling pipe accommodated in the pipe accommodating groove of the rear plate is formed by bending the shape of the cooling main pipe and the mutually parallel side main pipe portions 8 321272 201103727 of the cooling main pipe. The length direction of the cooling branch pipe is arranged at a fixed interval, and the cooling water supplied through the cooling main pipe can be juxtaposed from each other when the both end portions of the cooling branch pipes communicate with the main pipe portions on the both sides. The cooling branch pipe is sprayed to the mold in a sentence. Further, the hose connecting short pipe is attached to the cooling main body of the cooling pipe, and when the hose connecting short pipe is externally protruded through the insertion hole provided in the die mounting bracket, the device can be externally mounted from the outside of the device. The cooling water supply hose is simply connected to the hose connecting short pipe, and by this connection, a cooling water supply line that reaches the cooling pipe disposed on the rear plate can be configured. The groove width of each of the tube accommodating grooves provided in the parallel state on the rear plate is formed to be 1/2 or less of the diameter of the end surface of the mold struts stuck on the rear plate, and even when the mold is replaced, even if the mold struts are The protruding end surface is located on the tube housing groove of the rear plate, and most of the protruding end surface can be locked to the rear plate surface around the tube housing groove. Therefore, it is possible to constitute a mold that always supports the column on the rear plate in a stable state. Installation structure. At this time, when the outer diameter of the cooling branch pipe accommodated in the tube housing groove is larger than the depth of the tube housing groove, a part of the peripheral wall of the cooling branch pipe protrudes from the tube housing groove to prevent the end face of the die struts from coming. In the case of the rear plate, the cooling branch pipe is formed by the tube capable of crushing and deforming, and even if the end surface of the mold post is located in the pipe receiving groove, the protruding peripheral wall portion of the cooling branch pipe protruding from the pipe receiving groove can be collapsed. When the cooling branch pipe is immersed in the tube housing groove, the end surface of the mold post abuts and is locked to the rear plate. [Embodiment] 9 321272 201103727 The surface 'combination _ describes a specific embodiment of the present invention, and the 1st figure = the main = knife = H face view of the foam molding apparatus configured to open the mold in the flat direction, and the foam molding apparatus Having the following: at the opposite end of the mold mounting bracket (4), the male mold 2 and the ancient square wire are inserted into the female mold 2 with the convex portion 2a 2β and the concave portion 2b. A cavity (forming space) 3 is formed between the male and female molds 2', ', 4 2a and the recess 2b'. 8' and 'on the open end of the back side of the above-mentioned mold mounting frame 1^(7), I extend to the open end to detachably and shackle the open end to seal the rectangular rear plate 4' 4 1Α, ΐβ_ These inner surfaces of the rear plates 4, 4 and the male model, mercy? Λ, , b, the space between the backs of the space parts m, A, and 28, which are cooled to 5, and can be steamed to the steam chamber 5 from the outside by steam (not shown). The protruding end faces 6a of the plurality of pillars 6 projecting from the back surface of the male mold 2a and the =2B toward the rear plates 4, 4 are locked to the above-mentioned rear plates 4, 4 opposed to the back surfaces of the male mold 2A and the female mold 2B. On the inner surface. Further, cold portions of the male and female molds 2A and 2B are attached to the inner surfaces of the rear plates 4 and 4, respectively. The mold cooling device has a structure in which a plurality of straight official storage grooves 7 are arranged in parallel at a predetermined interval on the inner surface of the rear = 4, and in the tube storage grooves 7, the cooling water is sprayed toward the opposite mold back surface. Cooling tube 8. When the structure of the mold cooling device is described in detail based on the second and third drawings showing an example of one mold truss 1A side, FIG. 2 is an exploded perspective view, and FIG. 3 is a slope of a rear plate including a cooling pipe. In the rear surface of the rear plate 4 321272 10 201103727, the inner surface opposite to the back surface of the male mold 2A is spaced apart in the horizontal direction, and a plurality of tube storage grooves 7 and 7. 7 which are parallel to each other are engraved. The upper and lower ends of the accommodating groove are formed in the vicinity of the upper and lower end edges of the rear plate 4, and the tube accommodating groove has a long straight shape in the up and down direction. On the other hand, the cooling raft is provided by the cooling main pipe 8a and the plurality of cooling branch pipes 8b. The length of the cooling main officer 8a is set to be slightly shorter than the banner of the rear plate 4. The plurality of cooling branches 8b are spaced apart from each other in the longitudinal direction of the cooling main pipe 8a at intervals of the interval between the pipe storage grooves 7 and 7. In parallel, the cooling pipe 8 is sequentially connected in the following state, and the cooling main pipe 8a is oriented in the horizontal direction, and the plurality of cold branch pipes 8D facing the vertical direction are made on the lower circumferential surface of the pipe wall of the cooling main pipe 8& The upper end is connected to the cooling supervisor status. (4) All the cooling branch pipe ribs connected and communicated with the cooling main pipe 8a: the upper end portion is bent from the upper end toward the inner surface side of the rear plate 4, and the cooling branch pipe 8b is cooled downwardly to the cooling main pipe via the upper end 3 curved portion 8b'' The length of the cooling branch pipe 8b is substantially equal to the length of the pipe (four) groove 7, and is formed so as to be accommodated in the pipe housing groove 7. = In the cooling pipe 8 which is formed by connecting the upper end of the plurality of cooling branches f8b with the cooling main pipe: and connecting the cooling main f 8a to the cooling branch pipe, the cooling main pipe (10) is placed on the upper plate 4 Horizontally arranged, and as shown in Fig. 4, the f-branch r8b is detachably received through the upper end bending portion (10), and the plurality of tube storage grooves 7, 7 are disposed on the rear plate 4 in five rows. . . 7 (4) in 'four' constitutes the mold cooling device. The groove width of each of the above-described official housing grooves 7 is formed to be equal to or less than one-half of the diameter of the cantilever end surface 6a of the mold post 321272 11 201103727 6 and equal to or smaller than the cooling branch pipe 8b. The width of the pipe is slightly wider, and the depth of each of the pipe receiving grooves 7 is formed to be equal to or smaller than the outer diameter of the cooling branch pipe 8b. Thereafter, the cooling pipe is stored as a whole. In the buried state, the cooling branch pipe 8b may be crushed and deformed like a copper pipe, and the depth may be made shallower than the outer diameter of the cooling branch pipe. In all of the cooling branch pipes 8b, a plurality of cooling water discharge holes 9 penetrating through the pipe wall are formed in the longitudinal direction, that is, at a small interval in the vertical direction, from the pipe receiving groove 7 toward the back pipe wall portion of the mold. 9:9, and the lower end is as shown in Fig. 5, and the cover member 14 that can be attached and detached can reliably clean the inside of the tube or the like by removing the cover member 14. Meanwhile, the diameter of the projecting end face 6a of the cookware branch 6 means the diameter of the perfect circle which can surround the smallest diameter of the projecting end face 6a. If the diameter of the cooling water discharge holes 9 is small, there is a concern that the impurities in the cooling water block the orifices, and it is difficult to provide such a small borehole. On the other hand, if the diameter of the cooling water discharge holes 9 is large At the time of 'reporting, it is difficult to maintain the upper end portion and the lower end portion of the cooling branch pipe 8b to be equal. Therefore, it is preferable to use 〇5 to 丨5 mm. Further, the total opening of the cooling water discharge hole 9 provided in all the cooling branch pipes 8b is provided. The area of the hole is set to be twice the area of the cross-section of the f-path in the cooling main pipe 8a, and the required amount of water is ensured in the tank, and it is preferable to maintain the elemental pressure. Further, in each of the cooling branch pipes 8b, the cooling water provided therethrough is In the length of the distance between the nine branches 8b and the length of the third branch 8b from the upper end of the cooling branch pipe 8b, the interval between the two portions is set to 2,0 mm, and the cooling water is ejected. In the length portion corresponding to 70% of the lower portion, the cooling water discharge hole 9 is provided at intervals of '50°, and the arrangement density of the cooling water discharge hole 9 is changed. Sparse, through such a structure The lower portion of the mold is not turned into a supercooled portion by the cooling water that is sprayed onto the upper portion of the male mold 2A and the negative cathode 2, and at the same time, all the cooling water discharge holes 9 are arranged to be sprayed with cooling water slightly obliquely upward. On the other hand, the cooling water discharge hole is not provided in the cooling main pipe 8a, but is configured to equally distribute the cooling water flowing inside thereof to all the cooling branch pipe ribs, and on the upper circumference of the cooling main pipe (four) pipe wall Two (or three or more) hose connecting short tubes 10 and 10 are provided to protrude upward, and the hose connecting short tubes 1Q and 1G are spaced apart from each other, and the lower end thereof communicates with the inside of the tube. The upper frame portion is provided with insertion holes n and u at intervals of the same distance from the hose connecting short tubes 1〇 and 1〇 in the left-right direction, and is sealed with a gasket (not shown). The hose connecting short tubes 1〇, 1〇 are inserted into the insertion holes 11 and 1 in a watertight manner, and the cooling water supply hose is connected to the upper end portion protruding from the mold mounting frame 1A. , 〗 2. In addition The means for attaching the rear plate 4 to the mold and the mounting frame in a detachable manner may be provided by providing bolt mounting holes in a plurality of portions of the outer peripheral portion of the rear portion, and on the other hand, in the mold mounting frame 1 A screw hole is provided in the open end surface of the back side, and the bolt 13 inserted through the bolt hole is inserted in the thread hole, but other segments may be used. 0 321272 5 13 201103727 In addition, 'on the other side of the mold mounting bracket 1B side In the same manner as described above, a plurality of tube housing grooves 7 which are parallel to each other are formed on the inner surface of the rear plate 4, and the tube housing groove 7 has the same structure as described above, and is long in the up-and-down direction and constant in the left-right direction. The tube accommodating grooves 7 are provided at intervals, and the cooling tube 8b is accommodated in the tube accommodating grooves 7 so that the plurality of cooling water discharge holes 9 provided on the wall of the cooling branch g 8b face the surface of the female mold. The upper end portion of the upper end curved portion 8b' of the cooling branch pipe is connected and communicated with the cold portion main body 8a at intervals of the longitudinal direction of the cooling main pipe 8a, and the like. However, the main pipe 8a is disposed in the horizontal direction along the inner surface of the upper end portion of the rear plate 4, and constitutes a mold cooling device having the same configuration as described above, and the two hoses for connecting the cooling main pipe are connected with the short pipes 10, 1〇, The water supply holes I and n are inserted into the insertion holes u and n provided in the upper frame portion of the mold mounting frame 1B, and the cooling water supply hoses I and I are connected to the protruding end portions from the mold mounting 1B. The pair of right and left mold trusses 1A, 1B are detachably mounted on the fixed template and the pure board, respectively. When the screaming shape is used, as in the prior art, after the mold clamping, the convexity of the male mold 2A is utilized. The portion 2a and the female mold, the concave portion 2b forms the cavity 3, and the cavity 3 is filled with foamable resin particles such as preliminary expanded particles, and then the steam is supplied to the steam chambers 5 and 5 and heated to be secondarily foamed. The cooling main water f 8a ' supplied with the cooling water to the cooling pipe 8 through the cooling water hose 12 is cooled from the cooling water H 8a in the plurality of cooling branch pipes accommodated in the pipe housing grooves 7 of the cooling water flow plates 4 and 4 The cooling nozzle opening 9 of the branch pipe 8b is cooled by spraying the water from the male mold (5), and the cooling water # after use is connected to the lower frame portion of the mold mounting frame 32272 14 201103727 1A, 1B. After the connected discharge port 15 is discharged, the mold is opened, and the foamed molded article is taken out. Further, the foamable resin particles are particles which are impregnated with a synthetic foaming agent and which are foamed by heating, and also contain preliminary foamed particles which are preliminarily foamed. Meanwhile, in the invention of the present application, the so-called preliminary expanded particles which are preliminarily foamed are mainly used. Examples of the synthetic resin constituting the above-mentioned expandable resin particles include polystyrene, impact-resistant polystyrene (Hlg impact), styrene-ethylene copolymer, and styrene-modified polyethylene resin styrene. - Polystyrene resin such as maleic anhydride copolymer or styrene-acrylonitrile copolymer, polyglycolic resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyethylene terephthalate A polyester resin such as a diester. Further, examples of the physical foaming agent include aliphatic hydrocarbons such as propane 'butane, pentane, and hexane; aliphatic cyclized hydrogens such as cyclopentane and cyclobutane; and trichlorofluoromethane; Halogenated hydrocarbons such as chlorodifluoromethane, dioxotetrafluoromethane, trichlorotrifluoroethane, methyl chloride, dichloromethane, and chloroethane. Further, when the mold is replaced, the male mold 2A and the female mold 2B are removed from the left and right mold mounting frames 1 and 1B, and the new male mold 2A and the female mold 2B are attached to the mold mounting frame. 1A,]B can be. At this time, the rear plates 4 and 4 having the cooling pipes 8 are not removed from the mold mounting frame 1, 1B, and the cooling pipes 8 provided on the rear plates 4 and 4 are directly used as cooling means for the mold. Since the inner surface of the rear plate 4, 4 is used to lock the end surface of the newly replaced mold post 6, it is not necessary to perform the piping work of the cooling pipe which requires a certain degree of proficiency, and the external work of the rear plate 4, etc. 321272 15 201103727 The mold can be replaced efficiently and sturdyly. The depth of the tube housing groove 7 is provided on the inner surface of the plate 4 after the end face of the die holder 6 is locked. When the cooling branch pipe 8b is crushable and deformable like a steel pipe, as shown in Fig. 6, the depth ratio can be made. The cooling branch pipe has a shallow outer diameter and is housed in a state in which one of the pipe walls of the cooling main pipe 8a protrudes from the inner surface of the rear plate 4 to the inside of the rear plate 4. In the official housing groove 7 of the rear plate 4 thus configured, when the mold post 6 is pressed against the cooling branch pipe rib whose end surface protrudes from the pipe receiving groove 7, the wall of the pipe receiving groove 7 is pressed by the pressure thereof. As shown in Fig. 7, the plastic deformation is formed into a horizontally long elliptical shape, and the end surface of the mold post 6 is surely abutted against the inner surface of the rear plate 4 while being not inserted into the tube housing groove 7. Fig. 8 is a view showing another embodiment of the mold cooling device according to the present invention. In the above embodiment, the cooling branch pipe 8b is arranged in the horizontal direction while being aligned in the vertical direction. The structure is such that the cooling branch pipes 8b are arranged side by side at regular intervals in the vertical direction in a state of being oriented in the horizontal direction. Specifically, the cooling main pipe 8a of the cooling pipe has a horizontal cooling main pipe portion 8a1 and two side main pipe portions 8a2, 8a2, and the both ends 4 of the horizontal cooling main pipe portion 8 & ι are bent at right angles to form the both sides. The main pipe portions 8a2, 8a2 form the cooling main pipe portion 8ai and the main pipe portions on both sides, and sc constitute the cooling main pipe 8a. Therefore, the cooling main pipe 8a is formed in a "mouth" shape, and both sides of the cooling main pipe portion 8a are superimposed. Between the portions 8a2 and 8a2, a plurality of cooling branches s 8b in a parallel state are arranged at regular intervals in the vertical direction, and both ends of the cooling branch pipes 8b are connected and connected to the main pipe portions 321272 16 201103727. On the other hand, on the inner surface of the rear plate 4, in the state of being aligned in the up-and-down direction, the pipe storage groove 7 which is straight in the horizontal direction is received at the same interval as the interval of the cooling branch pipe 8b, and the pipe storage groove is provided. 7, having a length formed at both ends to the vicinity of both side ends of the rear plate 4, so that the horizontal cooling main pipe portion Μ and the side main pipe portions 8a2, 8a2 of the cooling main pipe 8a formed in a "]" shape are formed as rearward The upper end of the inner surface of the plate 4 is along two The side end portion is sorrowful, and all the cooling branch pipes 8b are detached from the plurality of pipe accommodating grooves 7 in a manner that the dog can be detached, and the corresponding pipe in the '7, .., 7' can be loaded and unloaded for storage and fixation. The cold inner table of the mold is formed: two: kg: both ends of the cooling branch pipe 8b are bent toward the surface of the rear plate 4, and the four eyes are arranged along the inner surface of the rear plate 4, The cooling main pipe 8a is configured to pour all the cooling branch pipes into the pipe ends 8b' and 8b of the inner end, and store them on the pipe wall of the pipe receiving groove 7, 7 , . It is also possible to dispose the second I, but it is also possible to install a p-unit (four) around the wall of the horizontal cooling main pipe 8ai of the cooling main pipe 8a, and two (more than two) hose connecting short pipes are protruded upward. 10, 1G, the hose connection = 〇, π) is connected to the inside of the horizontal cooling main pipe 8al by a predetermined n and five stone forces. The upper side of the horizontal cooling main pipe 8ai is spaced apart from the upper side of the mold. In the frame portion, the space between the right and left right s connecting short tubes 10 and 10 is the same as the interval 321272 17 201103727. 1.11, the hose connecting short tubes 10, 10 are inserted through the sealing gaskets (not shown) in a watertight manner in the insertion holes 11, 11 and in the mold mounting frame. (1B) The cooling water supply hoses 12 and 12 are connected to the protruding upper end portion. The pair of right and left mold mounting frames ΙΑ, 1B having the mold cooling device configured as described above are the same as the cooling device of the mold at the time of mold replacement, It is provided in a state in which it is not required to be detached from the mold mounting frame 1, 1B, and the end faces of the newly replaced mold struts 6 are locked by the inner surfaces of the rear plates 4 and 4. Further, the diameter of the cooling main pipe 8a, the cooling branch pipe 8b, or the diameter of the cooling water discharge hole 9 that is provided in the cooling branch pipe 8b is the same as that of the above-described embodiment, but the pitch of the cooling water discharge hole 9 is set. The distance between the cooling water discharge holes 9 and the plurality of cooling branch pipes 8b which are provided in an upper portion corresponding to 30% of the total number of the pipes is set at a constant interval with respect to the longitudinal direction of the pipe. In the plurality of cooling branch pipes 8b which are disposed at a lower portion corresponding to 70% of the total number of the pipes, the pitch of the cooling water discharge holes 9 is larger than the pitch of the cooling water discharge holes 9 of the upper side, so that The lower portion of the mold is supercooled due to the flow of cooling water sprayed onto the upper portion of the male mold 2A and the female mold 2B. Further, it is preferable that all of the cooling water discharge holes 9 are provided so as to be sprayed so that the cooling water is slightly inclined upward. Furthermore, in any of the above embodiments, the tube housing grooves 7, 7' are directly provided on the inner surface of the rear plate 4. However, as shown in Fig. 9, the inner surface of the rear plate 4 may be attached. The inner lining material 18 321272 201103727 4' having a certain thickness is provided with the tube accommodating grooves 7, 7' on the inner lining material 4', and the protruding end faces of the mold-pillars 6 are locked. In the mold cooling device described above, it is described that the rear plates 4 and 4 are attached to the open ends of the mold mounting frames 1 and 1B, and the inner surfaces of the rear plates 4 and 4 are provided with tube storage. The grooves 7 and 7' accommodate the cooling pipes in the pipe storage grooves 7, 7'. However, the rear plates 4 and 4 may be detachably attached to the open ends of the mold mounting frames 1A and 1B. Tube housing grooves 7, 7' are provided on the inner surface of any of the rear plates 4, 4, and the cooling pipes are housed in the tube housing grooves 7, 7'. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional side view of a main part of a foam molding apparatus; Fig. 2 is an exploded perspective view of a mold cooling device; Fig. 3 is a rear surface oblique view of a cooling tube; FIG. 5 is an enlarged longitudinal sectional side view showing a back side of a mold mounting frame including a mold cooling device; and FIG. 6 is a partial cross-sectional view showing a state in which a cooling branch pipe is accommodated in a shallow tube housing groove; Fig. 7 is a cross-sectional view showing a state in which a mold post is locked in a groove; Fig. 8 is a view showing an exploded perspective view of another form of the mold cooling device; and Fig. 9 is a longitudinal sectional view showing a state in which the inner lining material of the rear plate is provided with a tube receiving groove side view. [Main component symbol description] ΙΑ, 1B mold mounting frame 19 321272 male mold female cavity rear plate lining material steam chamber pillar protruding end face tube storage groove tube storage groove cooling pipe cooling main level cooling main pipe side main pipe cooling pipe bending Part cooling water discharge hole hose connection short pipe insertion hole cooling water hose bolt cover part discharge port 20 321272