200305494 (1) 玫、發明說明 【發明所屬之技術領域】 本發明係有關成型收縮率相異之2種熱可塑性材料之 一體成型方法及使用該方法所形成之汽車用門板。 【先前技術】 以往，在裝設於汽車上之汽車用門板中，對於門板上 部與門板下部所要求之性能不同。也就是，門板之上部較 門板下部更要求其耐衝擊性、耐候性、耐熱性。 如此之汽車用門板，雖然，例如在以單純聚丙烯來形 成門板下部，而以含有塡充物之聚丙烯來形成門板上部之 後，藉由將此兩個零件接合而製造，但是因爲必須有各別 製造門板上部及門板下部之步驟與將這些接合之步驟等2 個步驟，所以花費很多的成本及時間。 在此，爲了解決諸如此類之問題，採用將模槽內藉由 可動區塊來區隔，而在藉由此可動區塊所區隔之空間中將 i次熱可塑性材料射出，在此丨次熱可塑性材料硬化之後 ，將可動區塊由模槽內後退，而在模槽內所剩餘之空間中 使2次熱可塑性材料射出之方法。 但是，在此方法中，形成門板上部之熱可塑性材料與 形成門板下部之熱可塑性材料，從模槽內射出開始到硬化 爲止之收縮率（成型收縮率）將有所差異。因此，在1次 熱可塑性材料硬化後將2次熱可塑性材料將收縮，成型品 之門板上部與門板下部之接合面上將產生非常大之殘留應 (2) (2)200305494200305494 (1) Description of the invention [Technical field to which the invention belongs] The present invention relates to an integral molding method of two thermoplastic materials having different molding shrinkage rates, and an automobile door panel formed by using the method. [Prior art] Conventionally, in the door panels for automobiles installed on automobiles, the performance required for the upper part of the door panel and the lower part of the door panel are different. That is, the upper part of the door panel requires more impact resistance, weather resistance, and heat resistance than the lower part of the door panel. Such a door panel for an automobile is manufactured by joining these two parts, for example, after the lower part of the door panel is formed of simple polypropylene and the upper part of the door panel is formed of polypropylene containing a filler. The steps of manufacturing the upper part of the door panel and the lower part of the door panel and the step of joining these two processes are not required, so it takes a lot of cost and time. Here, in order to solve such problems, the movable grooves are used to separate the inside of the mold groove, and the thermoplastic material is ejected i times in the space separated by the movable blocks. After the plastic material is hardened, the movable block is retracted from the mold groove, and the thermoplastic material is ejected twice in the space remaining in the mold groove. However, in this method, the shrinkage (molding shrinkage) of the thermoplastic material forming the upper part of the door panel and the thermoplastic material forming the lower part of the door panel will be different from the injection in the mold cavity to the hardening. Therefore, once the thermoplastic material is hardened, the thermoplastic material will be shrunk twice, and a very large residual stress will be generated on the joint surface between the upper part of the door panel and the lower part of the molded product. (2) (2) 200305494
【發明內容】 本發明之主要目的係爲提供能減低2種之熱可塑性材 料間之接合面上的殘留應變之熱可塑性材料的一體成型方 法及使用該方法所形成之汽車用門板。因此，本發明之熱 可塑性材料之一體成型方法及使用該方法所形成之汽車用 門板係採用以下之構成。 本發明之一體成型方法係爲將成型收縮率不同之2種 熱可塑性材料一體成型之熱可塑性材料的一體成型方法， 具備有將作爲1次熱可塑材料之成型收縮率較高之熱可熱 性材射出於模槽內之1次熱可塑性材料射出步驟，及將作 爲2次熱可塑性材料之成型收縮率較低之熱可塑性材料之 2次熱可塑性材料射出於模槽內之2次熱可塑性材料射出 步驟；該2次熱可塑性材料射出步驟中，有在1次熱可塑 性材料之收縮進行中，當因1次熱可塑性材料之殘留收縮 量之收縮率變成與前述2次熱可塑性材料之成型收縮率相 等時，將前述2次熱可塑性材料射出於前述模槽內之特徵 〇 作爲本發明之一體成型方法中所使用之熱可塑性材料 ，可舉例出眾知之熱可塑性樹脂，熱可塑性合成橡膠及其 混合物。 作爲2種之熱可塑性材料，雖然可列舉出各種顏、成 型收縮率、電氣性質、射熱性、耐衝擊性、耐候性等不同 -8- (3) (3)200305494 之材料，但是最好作爲1次熱可塑性材料的爲單純聚丙少希 ，作爲2次熱可塑性材料爲含有塡充物之聚丙烯。此外， 作爲含於2次熱可塑性材料之塡充物可列舉出滑石、橡膠 等。 在以上之一體成型方法中，最好具備有在前述模槽內 將2個可動區塊，閉鎖之模槽閉鎖步驟，藉由將前述一方 之可動區塊對於前述模槽來隔離而形成1次熱可塑性材·米斗 之射出空間，在前述2次熱可塑性材料射出步驟中，則藉 由將前述另一方可動區塊對於前述模槽來隔離，以形成2 次熱可塑性材料之射出空間。（型芯後退方式）， 此外，最好前述模槽係被設置於互相接近，而可隔離 之2個模板中之一方，而前述2個可動區塊係設置於前述 另一方模板，且可對該另一方模板各別地接近、隔離，在 前述模槽閉鎖步驟中使前述模板互相接近以前述可動區塊 將前述模槽閉鎖，而在前述各熱可塑性材料射出步驟中於 維持前述模板互相之間隔之狀態下，因爲將前述各可動區 塊靠近前述另一方模板而由前述模槽來加以隔離，在形成 前述各次熱可塑性材料射出之後，再射出前述各次熱可塑 性材料。 此外，在前述1次熱可塑性材料及前述2次熱可塑性 材料中也可以含有發泡劑。作爲發泡劑，雖然含有揮發性 發泡劑、分解性發泡劑、超臨界氣體等，但在射出成型中 特別是最好爲含有分解性發泡劑之有機化合物。 根據此般之本發明，將成型收縮率高之熱可塑性材料 (4) (4)200305494 爲1次熱可塑性材，成型收縮率低之熱可塑性材作爲2次 熱可塑性材，首先，以2個可動區塊將模槽閉鎖。之後， 藉由將一方之可動區塊對於模槽作隔離而形成1次熱可塑 性材料之射出空間，並將〖次熱可塑性材料射出於該1次 熱可塑性材料之射出空間內。 接著，將進行所射出之1次熱可塑性材料之收縮，當 因成型收縮量之內部殘留的收縮量之收縮率變成與2次熱 可塑性材料之成型收縮率相等時，將另一方之可動區塊， 對於模槽作隔離而形成2次熱可塑性材料之射出空間，並 將該2次熱可塑性材料射出於該2次熱可塑性材料之射出 空間中。因此，因爲在2次熱可塑性材料被射出之後，於 1次熱可塑性材料與2次熱可塑性材料之接合面，所進行 之收縮的收縮率將相同，所以就算這些熱可塑性材料硬化 ，在熱可塑性材料之間的接合面上之殘留應變也能減低。 若2次熱可塑性材料射出之時間較早，1次熱可塑性 材料所剩餘之收縮率將變成較2次熱可塑性材料之成型收 縮率大，反而，若2次熱可塑性材料射出時間較遲，則1 次熱可塑性材料所剩餘之收縮率將變成較2次可塑性材料 之成型收縮率小，任何一種情況均會使殘留應變增大。 因爲1次熱可塑性材料不會從1次熱可塑性材料射出 窆間漏向2次熱可塑性材料之射出空間，所以因爲防止i 次熱可塑性材料與2次熱可塑性材料之目視界面的混亂， 而能防止成型品側面部分毛邊的產生。 因採用藉由使各可動區塊對於模槽作隔離，而形成2 -10- (5) (5)200305494 次熱可塑性材料射出空間之型芯後退方式，所以與採用藉 由使可動區塊在模槽內回轉而形成2次熱可塑性材料射出 空間之型芯旋轉方式相比，能使可動區塊，可動區塊之驅 動裝置，模槽等小型化。 此外，若在1次熱可塑性材料及2次熱可塑性材料中 含有發泡劑，更能實現成型品之輕量化。 〔射出壓縮成型（IPM : Injection Press Molding)〕 也可以設計爲在前述所射出之熱可塑性材料中附加壓 縮力之熱可塑材料壓縮步驟。 也可以在前述2次熱可塑性材料上積層上前述1次熱 可塑性材料。 例如，將可動區塊對於模槽作隔離來形成塑可塑性材 料之射出空間，並且於只在隔離狀態下，將熱可塑性材料 充塡於模槽之後，使該可動區塊接近模槽，階段性的在熱 可塑性材料中施以壓縮力。但是，因爲是在將熱可塑性材 料充分充慎於模槽內後才施加壓縮力，所以可提升熱可塑 性材料之流動性，除了能降低澆口之點數外也可能爲薄肉 成型。此外，因爲能低壓成型，所以也能降低成型時之彎 曲或變形。 藉由在2次熱可塑或材料上積層1次熱可塑性材料， 能隱蔽關於特別是含有補強纖維或發泡劑之熱可塑性材料 變白等之外觀不良狀況。 (6) (6)200305494 〔射出氣體成型（GIΜ : G a s a s s i s t e d I n j e c t i ο η Μ ο 1 d 丨 n g ) ] 此外’也可以設置在前述所射出之熱可塑性材料內部 中注入氣體之形體入步驟。 只選擇在模槽內所射出之溶融狀狀態之熱可塑性材料 的厚肉部（氣體管道）的內部注入氣體，在熱可塑性材內 部形成中空部。因此，能竇現成型品之薄內化及較量化， 材料量的減低、殘留應力之減低、毛邊的防止等。 · 〔射出膨脹成型（IE M : I n j e c t i ο η E X p a n d e d Μ ο 1 d i n g )〕 此外，也可以設置使前述i次熱可塑性材料及前述2 次熱可塑性材料含有補強纖維，於前述熱可塑性材料射出 之後，增大前述模槽之容積使前述熱可塑性材料膨脹之熱 可塑性材料膨脹步驟。 例如，在熱可塑性材料射出之後，藉由使可動區塊再 對模槽作隔離，使模槽之容積增大。藉此，因爲在成型時 β 補強纖維，將藉由彈性回復力而膨脹（彈簧後退現象）， 而能得到變曲剛性、斷熱性、吸著性高之成型品。 【實施方式】 〔爲實施發明之最佳方式〕 以下將本發明之各實施形態佐以圖面加以說明。並且 ，於以下之實施形態的說明’關於同一構成要件將附上同 一符號，並省略或簡化其說明。 -12- (7) (7)200305494 〔第1實施形態〕 在第1圖中揭示有關於本發明之一實施形態，使用熱 可塑性材料的一體成型方法之射出成型機1的斷面圖。 射出成型機1係具備有設置有模槽2之固定模板3， 於固定模板3藉由複數之連桿6所連結之固定板5，在固 定丨旲板3與固定板5間，設置成可沿著模板6進退，且支 持可動區塊1 1 A、1 [ B之移動模板7。 在固定板5上設置有鎖模裝置9，該鎖模裝置9具備 有活塞桿4A之鎖型汽缸4，隨著汽缸4之活塞桿4A的進 退使移動模板7對於模板3進退之軸節機構8。也就是， 藉由鎖型裝置9，固定模板3與移動模板7將可以相互接 近或隔離。 移動模板7則具備有使可動區塊1 1 A、1 i B對於移動 模板7作進退之進退機構1 0。 進退機構1 0係具備有設置於移動模板7上之第1盤 構件12，由該第1盤構件丨2向模槽2延伸之導引桿14， 可沿著導引桿1 4移動而設置之第2盤構件1 3 ’設置於第 1盤構件丨2使可動區塊Π A、1 1 B進退之汽缸1 5 A、1 5 B 〇 汽缸15A、15B具有活塞桿16A、16B，而該活塞桿 1 6 A、i 6B之先端則通過設置於第2盤構件1 3之插通孔而 連結於可動區塊i 1 A、1 1 B中。因此，藉由使活塞丨6 A、 16B進退，2個可動區塊1 1 A、1 1B將平行於導引桿丨4而 -13- (8) (8)200305494 移動，對於移動模板7各別地接近、隔離。 這些汽缸15A、15B係各別連接於油壓元件27中，並 各別地被控制。 根據以上之射出成型機丨，藉由控制汽缸4，而使移 動模板7朝向固定模板3進退，能使可動區塊1 1與可動 區塊UB —體的對於模槽2作進退。 此外，藉著控制油壓元件27，不用移動模板7就可 公使可動區塊i i A及可動區塊1 1 B個別的對模槽2作進退 〇 在第2圖中，揭示有模槽2及可動區塊1 1 A、i 1 B之 擴大斷面圖。 模槽2及2個可動區塊1 i A、1 i B係爲了形成汽車用 門板之模具，而使汽車用門板上部及汽車用門板下部（參 照第4圖及第5圖）一體成型。 可動區塊1 1 A爲對於模孔2只後退既定尺寸的狀態， 而可動區塊1 1 B則爲對於模槽2完全閉鎖之狀態。在該狀 態下於可狀區塊1 1 A與模槽2之間將形成爲了形成汽車用 門板下部之1次熱可塑性材料射出空間1 2 A。 由此狀態，當使可動區塊1 1 B只後退既定之尺寸時（ 第2圖中以1點虛線所示）’在可動區塊丨1B與模槽2之 間，則形成爲了形成汽車用門板上部之2次熱可塑性材料 射出空間1 2 B。 在模槽2中，將ί次熱可塑性材料射出之射出裝置 2 8 Α及將2次熱可塑性材料射出之射出裝置2 8 A、2 8 Β之 -14- 200305494 Ο) 射出噴射噴將藉由流道襯套2 2 A、2 2 B而連接在一起。 在各可動區塊Π A、丨1 B中，埋設有爲了將氣體充塡 在1次熱可塑性材料射出空間丨2 A之1次熱可塑性材料內 部之氣體栓20A ’與爲了將氣體充塡於充塡在2次熱可塑[Summary of the Invention] The main object of the present invention is to provide an integral molding method of a thermoplastic material capable of reducing residual strain on a joint surface between two kinds of thermoplastic materials, and an automobile door panel formed by using the same. Therefore, the one-piece molding method of the thermoplastic material of the present invention and the door panel for an automobile formed by using this method have the following constitutions. The one-body molding method of the present invention is an integrated molding method of a thermoplastic material that integrally molds two types of thermoplastic materials having different molding shrinkage ratios, and is provided with a thermally heat-resistant material having a higher molding shrinkage ratio as a primary thermoplastic material. 1 step of injection of thermoplastic materials into the mold cavity, and 2 shots of thermoplastic material into the mold cavity, 2 times of thermoplastic material with lower molding shrinkage as the thermoplastic material Step; in the second thermoplastic material injection step, during the shrinkage of the primary thermoplastic material, when the shrinkage rate due to the residual shrinkage of the primary thermoplastic material becomes the same as that of the second thermoplastic material When equal, the above-mentioned two times of thermoplastic materials are injected into the features of the aforementioned mold grooves. As the thermoplastic materials used in the one-body molding method of the present invention, known thermoplastic resins, thermoplastic synthetic rubbers, and mixtures thereof can be exemplified. As the two types of thermoplastic materials, various materials including different colors, molding shrinkage, electrical properties, heat radiation, impact resistance, and weather resistance can be listed. -8- (3) (3) 200305494, but it is best used as The primary thermoplastic material is pure polypropylene Shaoxi, and the secondary thermoplastic material is polypropylene containing a filler. Examples of the filler contained in the secondary thermoplastic material include talc and rubber. In the above-mentioned one-body molding method, it is preferable to include a step of locking the two movable blocks in the aforementioned mold groove and closing the mold groove, and to isolate the movable block of the one side from the mold groove to form the mold once. In the injection space of the thermoplastic material and rice bucket, in the aforementioned two steps of the injection of the thermoplastic material, the other movable block is isolated from the mold slot to form the injection space of the second thermoplastic material. (Core backing method) In addition, it is preferable that the aforementioned die grooves are arranged close to each other and one of the two templates that can be isolated, and the two movable blocks are arranged on the other template, and the The other template is approached and isolated separately, the templates are brought close to each other in the mold slot locking step, the mold slots are locked with the movable block, and the mold plates are maintained in a mutual relationship during the injection of each thermoplastic material. In the spaced state, the movable blocks are separated by the mold grooves because the movable blocks are close to the other template. After the injection of the thermoplastic materials is formed, the thermoplastic materials are ejected. The primary thermoplastic material and the secondary thermoplastic material may contain a foaming agent. Although the foaming agent contains a volatile foaming agent, a decomposable foaming agent, a supercritical gas, and the like, it is particularly preferable to use an organic compound containing a decomposable foaming agent in injection molding. According to the present invention, a thermoplastic material (4) (4) 200305494 with a high molding shrinkage rate is a primary thermoplastic material, and a thermoplastic material with a low molding shrinkage rate is a secondary thermoplastic material. First, two plastic materials are used. Movable blocks lock the mold slots. After that, by separating one movable block from the mold slot, a primary thermoplastic material ejection space is formed, and a secondary thermoplastic material is ejected into the primary thermoplastic material ejection space. Next, the primary thermoplastic material that is injected will be shrunk. When the shrinkage of the shrinkage remaining inside due to the molding shrinkage becomes equal to the shrinkage of the secondary thermoplastic material, the other block will be moved. To isolate the mold groove to form the injection space of the second thermoplastic material, and eject the second thermoplastic material into the injection space of the second thermoplastic material. Therefore, after the secondary thermoplastic material is injected, the shrinkage of the shrinkage will be the same at the joint surface of the primary thermoplastic material and the secondary thermoplastic material. Therefore, even if these thermoplastic materials are hardened, Residual strain on the joint surfaces between materials can also be reduced. If the injection time of the second thermoplastic material is earlier, the remaining shrinkage rate of the first thermoplastic material will become larger than that of the second thermoplastic material. On the contrary, if the second injection time of the thermoplastic material is later, then The remaining shrinkage of the primary thermoplastic material will be smaller than the molding shrinkage of the secondary plastic material. In any case, the residual strain will increase. Because the primary thermoplastic material does not leak from the primary thermoplastic material to the space between the secondary thermoplastic materials, it prevents the visual interface between the primary thermoplastic material and the secondary thermoplastic material from being confused. Prevent burrs on the side of the molded product. Since the movable block is separated from the mold groove to form a core retreat method of 2 -10- (5) (5) 200305494 shots of thermoplastic material, the same method is adopted as the movable block in the Compared with the core rotation method in which the mold groove rotates to form the second thermoplastic material injection space, the movable block, the driving device of the movable block, and the mold groove can be miniaturized. In addition, if a foaming agent is contained in the primary thermoplastic material and the secondary thermoplastic material, the weight of the molded product can be further reduced. [Injection Compression Molding (IPM: Injection Press Molding)] It is also possible to design a compression step of a thermoplastic material that adds a compressive force to the injected thermoplastic material. The primary thermoplastic material may be laminated on the secondary thermoplastic material. For example, the movable block is isolated from the mold slot to form an injection space of plastic plastic material, and the thermoplastic block is filled in the mold slot only in the isolated state, and then the movable block is close to the mold slot. Exerts compressive force in a thermoplastic material. However, since the compressive force is applied only after the thermoplastic material is sufficiently filled in the mold cavity, the fluidity of the thermoplastic material can be improved. In addition to reducing the number of gate points, it may also be formed into thin meat. In addition, since low-pressure molding can be performed, bending or deformation during molding can also be reduced. By laminating the primary thermoplastic material on the secondary thermoplastic material or the material, it is possible to conceal appearance defects such as whitening of the thermoplastic material containing a reinforcing fiber or a foaming agent. (6) (6) 200305494 [Injected gas molding (GIM: G s a s s i s t e d I n j e c t i ο η Μ ο 1 d 丨 n g)] In addition, ′ may be provided in the step of injecting a gas into the interior of the injected thermoplastic material. Gas is only injected into the thick meat portion (gas duct) of the molten thermoplastic material injected in the mold cavity, and a hollow portion is formed inside the thermoplastic material. Therefore, thinner and more quantified existing products can be reduced, the amount of materials can be reduced, residual stress can be reduced, and burrs can be prevented. · [Injection expansion molding (IE M: I njecti ο η EX panded Μ ο 1 ding)] In addition, the i-th thermoplastic material and the second-time thermoplastic material may be provided with reinforcing fibers, and the thermoplastic material may be injected. After that, the thermoplastic material expansion step of increasing the volume of the mold groove to expand the thermoplastic material. For example, after the thermoplastic material is ejected, the movable block is isolated from the mold groove to increase the volume of the mold groove. Because of this, the β-reinforcing fiber is expanded by the elastic restoring force during the molding (spring receding phenomenon), and thus a molded product with high flexural rigidity, thermal insulation and high absorbing properties can be obtained. [Embodiment] [Best Mode for Carrying Out the Invention] Each embodiment of the present invention will be described with reference to the drawings. In addition, in the following description of the embodiment ', the same reference numerals are attached to the same constituent elements, and descriptions thereof are omitted or simplified. -12- (7) (7) 200305494 [First Embodiment] A sectional view of an injection molding machine 1 using an integral molding method using a thermoplastic material according to an embodiment of the present invention is shown in FIG. 1. The injection molding machine 1 is provided with a fixed template 3 provided with a die groove 2. A fixed plate 5 connected to the fixed template 3 by a plurality of connecting rods 6 is provided between the fixed plate 3 and the fixed plate 5. Advance and retreat along template 6 and support movable template 7 of movable blocks 1 1 A, 1 [B. A mold clamping device 9 is provided on the fixed plate 5. The mold clamping device 9 is provided with a lock cylinder 4 having a piston rod 4A, and a shaft mechanism for moving the mold plate 7 to and from the mold plate 3 as the piston rod 4A of the cylinder 4 advances and retracts. 8. That is, with the lock type device 9, the fixed template 3 and the movable template 7 can be approached or isolated from each other. The movable template 7 is provided with a forward and backward mechanism 10 for moving the movable blocks 1 1 A, 1 i B to move the movable template 7 forward and backward. The advance and retreat mechanism 10 is provided with a first plate member 12 provided on the movable platen 7, and a guide rod 14 extending from the first plate member 2 to the die groove 2 can be installed along the guide rod 14 The second disk member 1 3 ′ is provided on the first disk member 丨 2 the cylinders 15 A and 15 B that move the movable blocks Π A and 1 1 B forward and backward. The cylinders 15A and 15B have piston rods 16A and 16B, and the The front ends of the piston rods 16 A and i 6B are connected to the movable blocks i 1 A and 1 1 B through insertion holes provided in the second disc member 13. Therefore, by moving the piston 6A and 16B forward and backward, the two movable blocks 1 1 A and 1 1B will move parallel to the guide rod 4 and -13- (8) (8) 200305494. Be close and isolated. These cylinders 15A and 15B are respectively connected to the hydraulic element 27 and controlled individually. According to the above injection molding machine 丨, by controlling the cylinder 4, the movable template 7 is moved forward and backward toward the fixed template 3, so that the movable block 11 and the movable block UB can be moved forward and backward with respect to the mold slot 2. In addition, by controlling the hydraulic element 27, the movable block ii A and the movable block 1 1 B can individually advance and retreat the mold slot 2 without moving the template 7. In the second figure, the mold slot 2 and the mold slot 2 are disclosed. Expanded sectional views of the movable blocks 1 1 A, i 1 B. The mold grooves 2 and the two movable blocks 1 i A and 1 i B are formed integrally with the upper part of the automobile door panel and the lower part of the automobile door panel (see Figs. 4 and 5) in order to form a mold for an automobile door panel. The movable block 1 1 A is in a state of retreating to a predetermined size for the two die holes, and the movable block 1 1 B is in a state of being completely locked for the die groove 2. In this state, a primary thermoplastic material injection space 1 2 A is formed between the deformable block 1 1 A and the mold groove 2 to form a lower portion of the door panel for an automobile. In this state, when the movable block 1 1 B is moved backward only by a predetermined size (shown by a dashed line in FIG. 2) 'between the movable block 丨 1B and the mold groove 2, it is formed to form an automobile. The second thermoplastic material ejection space 1 2 B in the upper part of the door panel. In the die groove 2, an injection device 2 8 Α which injects a thermoplastic material and a injection device 2 8 A, 2 8 B which is a 14-200305494 〇) injection injection will be performed by The runner bushes 2 2 A and 2 2 B are connected together. In each of the movable blocks Π A and 丨 1 B, a gas plug 20A ′ inside the primary thermoplastic material for filling gas into the primary thermoplastic material ejection space 丨 2 A is embedded, and for filling the gas in the primary plastic material. Filled in 2 times hot plastic
性材料射出空間1 2 B之2次熱可塑性材內部之氣體栓2 0 B 〇 回到第1圖，在氣體栓20A、20B中則各別連接有供 給氣體之氣體注入裝置2丨A、2 1 B。 φ 這些氣體注入裝置21A、21B油壓元件27及射出裝置 28A、28B係以控制裝置29來控制。 接著說明關於本實施形態之射出成型機丨的動作。 首先，藉由鎖型裝置9使移動模板7前進，做模槽2 完全閉鎖。由此狀態，藉由汽缸1 5 A，便可動區塊1 1 a只 後退既定之尺寸a，而形成1次熱可塑性材料射出空間 ί 2 A。接著，在1次熱可塑性材料射出空間i 2 A中，由射 出裝置28A將溶融之1次熱可塑性材料射出。 鲁 由射出裝置2 8 A之溶融樹脂射出終了經過既定之時間 後，也就是，所射出之丨次熱可塑性材料之收縮將進行， 當因成型收縮量之內殘留的收縮量的收縮率變成等於2次 熱可塑性材料的成型收縮率時，藉由汽缸1 5 B使可動區塊 ί 1 B只退後既定之尺寸a ’藉此形成2次熱可塑性材料射 出空間1 2 B。接著’在2次熱可塑性材料射出空間1 2 B中 ，由射出裝置28B將溶融之2次熱可塑性材料射出° 根據本實施形態，在2次熱可塑性材料被射出後’因 -15- (10) (10)200305494 爲在丨次熱可塑性材料與2次熱可塑性材料之之接合面所 進行之收縮的收縮率將變成相同，所以就算這些熱可塑性 材料硬化’在熱可塑性材料之間的接合面之殘留應變能夠 減低。 〔第2實施形態（射出壓縮成型；ipm )〕 在本實施形態中，於各次熱可塑性材料附加壓縮力的 點與第1實施形態相異。 關於本實施形態之可動區塊1 1 B係如第3圖所示，缺 少接於壓可動區塊i i A上之一部分。 首先，藉由鎖型裝置9使移動模板7前進，而使模槽 2呈完全關閉之狀態。由此狀態中，藉由汽缸1 5 A將可動 區塊1 1 A較既定之尺寸再稍微後退，而形成1次熱可塑性 材料射出空間1 2 A。 接著，由射出裝置2 8 A之射出噴嘴將溶融1次熱可塑 性材料射出充塡於1次熱可塑性材料射出空間1 2 A中。在 由充塡終了之瞬間前到1次熱可塑性材料，硬化而沒有流 動性爲此的時間（通常爲充塡終了後立刻），將可動區塊 1 i A前進到既定尺寸a爲止’來壓縮1次熱可塑性材料。 接著，與可動區塊1丨A相同，藉由汽缸1 5 B將可動 區塊1 1 B較既定尺寸a再稍微後退，而形成2次熱司塑性 材料射出空間1 2 B。在於該2次熱可塑性材料射出空間 1 2 B射出充塡2次熱可塑性材料後，將可動區塊1丨B前進 到既定尺寸a爲止’來壓縮2次熱可塑性材料。 -16- (11) (11)200305494 此時，可動區塊1丨B係因爲有一部分欠缺，所以在該 欠缺部分將流入1次熱可塑性材料’在2次熱可塑性材料 與1次熱可塑性材料之接合部上’能在2次熱可塑性材料 的上面積層上1次熱可塑性材料。 根據本實施形態，因爲熱可塑性材料係在模槽內充分 充塡後再附加壓縮力，所以變成提昇熱可塑性材料之流動 性除能降低澆口點數外，也變成可以薄肉成型。此外’因 爲能低壓成型，而能減低成型時之變曲或變形。此外’藉 由在2次熱可塑性材料上積層上1次熱可塑性材料’也能 隱蔽白化等之外觀不良。 〔第3實施形態（射出氣體成型；GIΜ )〕 本實施形態中，在各次熱可塑性材料之內部將氣體注 入的點與第1實施形態相異。 也就是，在射出於模槽2內溶融狀態之熱可塑性材料 的厚肉部（氣體管道）的內部，藉由氣體栓20Α、20Β將 氣體注入，在熱可塑性材料內部形成中空部。 因此’根據本實施形態，能實現成型品之薄肉化及 輕量化，材料量之減低，殘留應力之減低，毛邊的防止等 〔第4實施形態（射出膨脹成型；I ε μ )〕 在本實施形態中，在2次熱可塑性材料中含有補強纖 維的點與第1實施形態相異。 -17- (12) (12)200305494 也就是，首先，與第1實施形態相同，形成1次熱可 塑性材料射出。 從由射出裝® 28A之溶融樹脂的射出終了開始經過既 定時間後，也就是所射出之1次熱可塑性材料的收縮將進 行，當因成型收縮纛之內殘量的收縮量之收縮率變成與2 次熱可塑性材料的成型收縮率相等時，藉由汽缸1 5 B，將 可動區塊1 i B只後退既定尺寸a的一半（a/2 )。藉此而 形成2次熱可塑性材料射出空間1 2 B。 Φ 在2次熱可塑性材料中含有平均纖維長爲1〜1 0 m m的 強纖維5〜70wt% ，最好爲1〇〜6〇wt% ’並將該2次熱可塑 性材料射出充塡於2次熱可塑性材料射出空間1 2 B。 所充塡之2次熱可塑性材料雖然因爲連接於可動區塊 1 1 B及模槽2之模型面而由外側開始慢慢地冷卻，但是藉 由在內部爲溶融狀態時將可動區塊1 1 B後退到既定尺寸a 爲止，而誘發補強纖維之彈性回後現象使2次熱可塑性材 料膨脹。 鲁 因此，根據本實施形態，能得到變曲剛性、斷熱性、 吸音性高之成型品。 〔實施例〕 以下面的條件，如第4圖及第5圖所示，使用2種熱 可塑性材料將汽車用門板30 —體成型後之結果揭示於以 下的表中。但是，上部側係爲汽車用門板部3 i，下部側 爲汽車用門板下部32之意思。 -18- (13) (13)200305494 表1 上部剛 下部 側 材料 GIM IPM IEM 積層 材料 GIM IPM 正Μ 實施例1 J-950HP 〇 MX164 〇 實施例2 J-950HP 〇 MX164 〇 實施例3 J-950HP 0 MX164 〇 實施例4 J-950HP 〇 〇 〇 MX164 〇 〇 實施例5 MX164 〇 Mostron L 〇 實施例6 J-950HP+ 發泡劑 〇 發泡劑 〇 比較例1 MX164 (一色） 〇 MX 164 C 一色） 〇 比較例2 MX164 〇 J-950HP 〇 C成型條件） 實施例1 ; 作爲射出成型置’如第1圖及第2圖所示使用射出成 型裝置及模具。模具係如第4圖及第5圖所示爲爲了形成 汽車用門板所用，在第2圖之斷面圖中，揭示有目視界面 線部3 4之附近。 在模具關閉Z狀悲下’爲J形成門板上部31使可動 區塊1 1A後退3.5mm ’來形成1次熱可塑性材射出空間。 在該空間中，將作爲1次熱可塑性材料之聚丙烯（出光石 油化學（株）製J _ 9 5 0 H P )以樹脂溫度2 0 0 °C，模具溫度 -19- (14) (14)200305494 4 0 °C來射出充塡。 接著，爲了形成門板下部32，將可動區塊1 1 B後退 j · 5晒，來形成2次熱可塑性材料射出空間。在該空間中 ’將作爲2次熱可塑性材之聚丙烯（出光石油化學（株） 製MX“ 64 )射出充塡。從1次熱可塑性材料之充塡終了 到2次熱可塑性材料充塡終了爲止爲1 〇秒。2次熱可塑 性材料的充塡後，於2次熱可塑性材料充分冷卻後，於2 次熱可塑性材料爲溶融狀態期間，於氣體管道中注入氣體 ，形成厚肉部3 3。在2次熱可塑性材料冷卻後，取出成 型品。 在此，1次熱可塑性材料（JN 9 50HP )及2次熱可塑性 材料（MX- i 64 )之收縮率5與時間τ之關係依下記要領 求得’由其結果來設定2次熱可塑性材之射出開始之時間 〇 首先，使用形成一邊長L之正方形模具，以模具溫度 4(TC將1次熱可熱性材料於樹脂溫度200 °C下射出成型。 由射出終了 5秒後將成型品取出，測定該四邊中最小的邊 長Μ，來求取收收率5 ( L-M ) /L。其段再5秒測定M値 求取收縮率。 此外，關於2次熱可塑性材料也以同樣手法求得收縮 在第6圖中，揭示有收縮率5與時間T之關係，於第 6圖中，將1次熱可塑性材料之最終收縮率δ (曲線，變平： 後之値）作爲5 1，2次熱可塑性材料之最終收縮率5 -20- (15) 200305494 曲線變平後之値）作爲6 2。此外，將丨次熱可塑性材料 之射出終了時間T作爲〇。 ί次熱可塑性材料之射出終了後，在讀取收縮率5由 0到5 2爲止之時間Τ1時，大約爲10秒。在該時間τ 1中 2次熱可塑性材料之射出時間將終了的來設定2次熱可塑 性材料之射出開始時間。 並且，進行爲了觀察時間Τ1之臨界性之實驗，而將 3亥結果揭不於以下的表中。也就是，將由丨次熟可塑性材 料之射出終了開始到2次熱可塑性材料之射出終了爲止的 時間爲t’以輿實施例1之相同成型方法只變化時間t。 在以下的表中，橫毛邊係代表目視界面部34中2次熱可 M t生材料之往丨次熱可塑性材料側侵入之意思。 表2 時間t(秒） 橫毛邊 5 6 7 8 9 10 15 20 無 紐 j \ \\ 魅 翻& J V \\ 赃 /\\\ 〜— _目視界面 有 有 有 無 紐 無 J\\\ 無_^ 結果 不適 不適 不適 適 適 適 £適The gas plug 2 0 B inside the secondary thermoplastic material ejection space 1 2 B is returned to the first figure, and the gas plugs 20A and 20B are each connected to a gas injection device 2 for supplying gas. A, 2 1 B. φ These gas injection devices 21A, 21B, hydraulic elements 27, and injection devices 28A, 28B are controlled by a control device 29. Next, the operation of the injection molding machine of this embodiment will be described. First, the movable mold plate 7 is advanced by the lock-type device 9 to completely lock the mold groove 2. In this state, by moving the cylinder 1 5 A, the movable block 1 1 a can be retracted by a predetermined size a to form a primary thermoplastic material injection space ί 2 A. Next, in the primary thermoplastic material injection space i 2 A, the molten primary thermoplastic material is injected by the injection device 28A. After a predetermined period of time has elapsed since the molten resin of the injection device 2 8 A has been injected, that is, the shrinkage of the thermoplastic material injected will proceed. When the shrinkage rate due to the remaining shrinkage within the shrinkage of the molding becomes equal to When forming the shrinkage rate of the secondary thermoplastic material, the movable block ί 1 B is retracted by the cylinder 1 5 B by a predetermined size a ′ to form the secondary thermoplastic material injection space 1 2 B. Next, in the secondary thermoplastic material injection space 1 2 B, the molten secondary thermoplastic material is ejected by the injection device 28B. According to this embodiment, after the secondary thermoplastic material is ejected, the factor is -15- (10 ) (10) 200305494 The shrinkage rate for the shrinkage at the joint surface of the secondary thermoplastic material and the secondary thermoplastic material will become the same, so even if these thermoplastic materials harden, the joint surface between the thermoplastic materials The residual strain can be reduced. [Second Embodiment (Injection Compression Molding; ipm)] In this embodiment, the point of applying a compressive force to each thermoplastic material is different from that of the first embodiment. As shown in Fig. 3, the movable block 1 1 B of this embodiment is not connected to the movable block i i A. First, the movable die plate 7 is advanced by the lock-type device 9 so that the die groove 2 is completely closed. In this state, the movable block 1 1 A is retracted slightly from the predetermined size by the cylinder 15 A to form a primary thermoplastic material injection space 12 A. Next, the primary thermoplastic material is melted and injected into the primary thermoplastic material injection space 12A through the injection nozzle of the injection device 28A. From the moment the filling is completed to the time when the thermoplastic material hardens without fluidity for this time (usually immediately after the filling is completed), the movable block 1 i A is advanced to the predetermined size a to compress 1-time thermoplastic material. Next, similar to the movable block 1 丨 A, the movable block 1 1 B is slightly retracted from the predetermined size a by the cylinder 1 5 B to form the secondary thermally-plastic material injection space 1 2 B. After the secondary thermoplastic material injection space 1 2 B ejects the secondary thermoplastic material, the movable block 1 丨 B is advanced to a predetermined size a 'to compress the secondary thermoplastic material. -16- (11) (11) 200305494 At this time, because part of the movable block 1 丨 B is lacking, it will flow into the primary thermoplastic material in the missing part. In the secondary thermoplastic material and the primary thermoplastic material The joint portion can be a primary thermoplastic material on the upper surface layer of the secondary thermoplastic material. According to this embodiment, since the thermoplastic material is sufficiently charged in the mold cavity and then a compressive force is added, the fluidity of the thermoplastic material can be improved, in addition to reducing the number of gate points, and forming thin meat. In addition, because it can be molded at low pressure, it can reduce warping or deformation during molding. In addition, 'by laminating a primary thermoplastic material on a secondary thermoplastic material', appearance defects such as whitening can be concealed. [Third Embodiment (Injected Gas Molding; GIM)] In this embodiment, the point of injecting a gas into each of the thermoplastic materials is different from that of the first embodiment. That is, inside the thick meat portion (gas duct) of the thermoplastic material injected into the molten state in the mold cavity 2, gas is injected through the gas plugs 20A and 20B to form a hollow portion inside the thermoplastic material. Therefore, according to this embodiment, thinning and lightening of a molded product, reduction of material amount, reduction of residual stress, prevention of burrs, etc. [Fourth Embodiment (Injection Expansion Molding; I ε μ)] In the aspect, the point that the reinforcing fiber is contained in the secondary thermoplastic material is different from that in the first embodiment. -17- (12) (12) 200305494 That is, first, in the same manner as the first embodiment, a single shot of a thermoplastic material is formed. After a predetermined period of time has elapsed since the injection of the melted resin of the injection device ® 28A, that is, the shrinkage of the thermoplastic material once will be performed. When the shrinkage of the residual shrinkage within the mold shrinkage becomes equal to When the molding shrinkage rate of the secondary thermoplastic material is equal, the movable block 1 i B is retracted by only half (a / 2) of the predetermined size a by the cylinder 15 B. As a result, the secondary thermoplastic material injection space 1 2 B is formed. Φ The secondary thermoplastic material contains 5 to 70% by weight of strong fibers with an average fiber length of 1 to 10 mm, preferably 10 to 60% by weight. 'The secondary thermoplastic material is injected to fill 2 Sub-thermoplastic material ejects space 1 2 B. The charged secondary thermoplastic material is slowly cooled from the outside because it is connected to the mold surface of the movable block 1 1 B and the mold groove 2. However, the movable block 1 1 is melted when the interior is molten. B retreats to a predetermined size a, and the elastic back phenomenon of the reinforcing fiber is induced to expand the secondary thermoplastic material. Therefore, according to this embodiment, it is possible to obtain a molded article with high flexural rigidity, high thermal insulation and sound absorption. [Examples] The following conditions are shown in the following table, as shown in Fig. 4 and Fig. 5, when two types of thermoplastic materials are used to mold the door panel 30 for automobiles. However, the upper side refers to the door panel portion 3 i for automobiles, and the lower side refers to the lower door panel portion 32 for automobiles. -18- (13) (13) 200305494 Table 1 Upper and lower side materials GIM IPM IEM Laminated material GIM IPM Positive M Example 1 J-950HP 〇MX164 〇Example 2 J-950HP 〇MX164 〇Example 3 J-950HP 0 MX164 〇 Example 4 J-950HP 〇〇MX164 〇〇 Example 5 MX164 〇 Mostron L 〇 Example 6 J-950HP + Foaming agent 〇 Foaming agent 〇 Comparative Example 1 MX164 (one color) 〇 MX 164 C one color) 〇 Comparative Example 2 MX164 〇J-950HP 〇C molding conditions) Example 1; As an injection molding apparatus, an injection molding apparatus and a mold were used as shown in FIG. 1 and FIG. 2. The mold system is shown in Figs. 4 and 5 for forming a door panel for an automobile. In the sectional view of Fig. 2, the vicinity of a visual interface line portion 34 is disclosed. When the mold is closed in a zigzag state, the upper part 31 of the door panel is formed for J, and the movable block 11A is retracted by 3.5 mm to form a primary thermoplastic material injection space. In this space, polypropylene (J_9 50 HP manufactured by Idemitsu Petrochemical Co., Ltd.), which is a primary thermoplastic material, is used at a resin temperature of 20 ° C and a mold temperature of -19- (14) (14) 200305494 4 0 ° C to injection charge. Next, in order to form the lower part 32 of the door panel, the movable block 1 1 B is moved backward by j · 5 to form a secondary thermoplastic material injection space. In this space, polypropylene is injected as a secondary thermoplastic material (MX 64 manufactured by Idemitsu Petrochemical Co., Ltd.). From the completion of the primary thermoplastic material to the secondary thermoplastic material The time is 10 seconds. After the second filling of the thermoplastic material, after the second thermoplastic material is sufficiently cooled, the gas is injected into the gas pipeline during the second time the thermoplastic material is in a molten state to form a thick meat portion 3 3 After the secondary thermoplastic material is cooled, the molded product is taken out. Here, the relationship between the shrinkage ratio 5 of the primary thermoplastic material (JN 9 50HP) and the secondary thermoplastic material (MX- i 64) and the time τ is as follows. The procedure is to set the time for starting the injection of the second thermoplastic material from the results. First, use a square mold with a length of one side and a mold temperature of 4 (TC to make the primary thermally-heatable material at a resin temperature of 200 ° C). Lower injection molding. The molded product is taken out 5 seconds after the end of the injection, and the smallest side length M of the four sides is measured to obtain a yield of 5 (LM) / L. The segment is measured for another 5 seconds to obtain the shrinkage ratio. In addition, about the secondary thermoplasticity The same method is used to obtain the shrinkage. In Figure 6, the relationship between shrinkage 5 and time T is revealed. In Figure 6, the final shrinkage ratio δ (curve, flattened: Ii) The final shrinkage rate of the 5th, 2nd thermoplastic material is 5 -20- (15) 200305494 The flattened curve 値) is 6 2 In addition, the last injection time T of the 1st thermoplastic material is 0. After the injection of the thermoplastic material is finished, the time T1 when the shrinkage ratio 5 is from 0 to 5 2 is read, which is about 10 seconds. Within this time τ 1 the injection time of the thermoplastic material 2 times will come to an end. The injection start time of the thermoplastic material is set twice. In addition, an experiment for observing the criticality of the time T1 is performed, and the results are not shown in the following table. That is, the injection of the second-boilable plastic material is started. The time until the end of the injection of the second thermoplastic material is t '. Only the time t is changed by the same molding method of Example 1. In the following table, the horizontal burr represents the second thermal Mt in the visual interface portion 34. Raw Materials The meaning of the invasion of sexual material side. Table 2 Time t (seconds) Horizontal burr 5 6 7 8 9 10 15 20 Wu Ni j \ \\ Charm & JV \\ Loot / \\\ ~ — _ Visual interface with or without无 无 J \\\ None_ ^ The result is uncomfortable and uncomfortable.
根據以上之實施結果，時間t爲8〜10秒之情形，沒 有橫毛邊’也沒有目視界圖。反之在時間t爲7秒以下的 情形或1 5秒以上之情形，發生橫毛邊或目視界面。 實施例2 ; -21 - (16) (16)200305494 在本實施例中，於充塡1次熱可塑性材料後於氣體管 道中注入氣體的點與第I實施例相異。 實施例3 i 作爲射出成型裝置，使用如第1圖及第2圖所示之射 出成型裝置及模具。模具係如第4圖及第5圖所示爲爲了 成型汽車用門板所用，在第2圖之斷面圖中，揭示有目視 界線部3 4附近。 在模具關閉之狀態下，將可動區塊1 1 A後退5.5顏， 來形成1次熱可塑性材料射出空間。在該空間中，將作爲 L次熱可塑性材料之聚丙烯（出光石油化學（株）製J - 9 50HP)，只有3.5画厚度分之容量以樹脂溫度200°C，According to the results of the above implementation, when the time t is 8 to 10 seconds, there are no horizontal burrs' and no visual map. Conversely, when the time t is 7 seconds or less or 15 seconds or more, a burr or a visual interface occurs. Embodiment 2; -21-(16) (16) 200305494 In this embodiment, the point of injecting gas into the gas pipe after filling the thermoplastic material once is different from the first embodiment. Example 3i As the injection molding apparatus, an injection molding apparatus and a mold as shown in Figs. 1 and 2 were used. As shown in Figs. 4 and 5, the mold system is used for molding automobile door panels. In the sectional view of Fig. 2, the vicinity of the visual line portion 34 is disclosed. When the mold is closed, the movable block 1 1 A is moved back by 5.5 colors to form a primary thermoplastic material injection space. In this space, polypropylene, which is a L-th order thermoplastic material (J-9950HP manufactured by Idemitsu Petrochemical Co., Ltd.), has a capacity of only 3.5 strokes and a resin temperature of 200 ° C.
模具溫度40 °C來射出充塡。充塡後立即將可動區塊1 1 A 前進2醒，使聚丙烯充滿而賦型。The mold temperature is 40 ° C for injection filling. Immediately after charging, the movable block 1 1 A is advanced 2 awake, so that the polypropylene is filled and shaped.
在1次熱可塑性材料之充滿終了後，使可動區塊1 1 B 後退5. 5 min，來形成2次熱可塑性料射出空間。在該空間 中’將作爲2次熱可塑性材料之聚丙烯（出光石油化學（ 株）製MX-164)，只有3.5 mi厚度分之容量，以樹脂溫 度20〇°c來射出充塡。由丨次熱可塑性材料之充塡終了到 2次熱可塑性材料之充塡終了爲止的時間爲1 0秒。 充塡後，立即使可動區塊1 1 B前進2 _，使聚丙烯充 滿而賦型。2次熱可塑或材料充分冷卻後，將成型品取出 ° 1次、2次熱可塑性材料均沒有實施往厚肉部之氣體注 入0 -22- (17) (17)200305494 實施例4 ; 本實施例中，於目視界線部3 4中將1次熱可塑性材 料積層於2次熱可塑或材料上的點，與實施例1相異。也 就是，作爲射出成型裝置，使用第1圖及第3圖所示之射 出成型裝置及模具。模具係如第4圖及第5圖所示，爲了 成型汽車用門板所用，在第3圖之斷面圖中，揭示有目視 界線部3 4之附近。 鲁 在模具關閉之狀態下，將可動區塊1 i A後退5.5匪， 來形成1次熱可塑性材料射出空間。在該空間中，將作爲 1次熱可塑性材料之聚丙烯（出光石油化學（株）製J -950HP ) ，只有3.5 inm厚度分之容量以樹脂溫度200 °C， 模具溫度40 °C來射出充塡。充塡後立即將可動區塊1 i A 前進2醒，使聚丙烯充滿，於所充滿之樹脂完全硬化爲止 期間，向氣體管道注入氣體使之成型，而形成厚肉部3 3 在1次熱可塑性材料之充滿終了後，使可動區塊1 i B 後退5. 5 mm，來形成2次熱可塑性料射出空間。在該空間 中’將作爲2次熱可塑性材料之聚丙烯（出光石油化學（ 株）製MX-164 )，只有3.5醒厚度分之容量，以樹脂溫 度200 °C來射出充塡。由1次熱可塑性材料之充塡終了到 2次熱可塑性材料之充塡終了爲止的時間爲1 〇秒。 充塡後，立即使可動區塊i 1 B前進2 mm，使聚丙烯充 滿，於所充滿之樹脂完全硬化爲止期間，向氣體管道注入 -23- (18) (18)200305494 氣體使之賦型，而形成厚肉部。2次熱可塑性材料充分冷 卻fe ’將成型品取出。 實施例5 ; 作爲射出成型裝置，使用如第丨圖及第2圖所示之射 出成型裝置及模具。模具係如第4圖及第5圖所示爲爲了 成型汽車用門板所用，在第2圖之斷面圖中，揭示有目視 界線部3 4附近。 在模具關閉之狀態下，將可動區塊i 1 A後退3 · 5 mm， 來形成1次熱可塑性材料射出空間。在該空間中，將作爲 1次熱可塑性材料之聚丙烯（出光石油化學（株）製 9 5 0HP )以樹脂溫度200 °C，模具溫度40 °C來射出充塡 〇 i次熱可塑性材料之充塡終了後，使可動區塊丨1 B後 退2 · 5 mm ’形成2次熱可塑或材料設出空間。在該空間中 ’將作爲2次熱可塑性材之聚丙烯（出光石油化學（株） 製mostron L )以樹脂溫度200°C來射出充塡。由1次熱可 塑性材料之充填終了到2次熱可塑性材料之充塡終了爲止 爲1 0秒。 充塡後2秒（在表面形成表皮層，內部爲熔融狀態時 )’使可動區塊1 1 B後退1醜，讓2次熱可塑性材料射出 空間的厚度’M成3.5 mm。2次熟可塑性材料充分冷卻後， 將成型品取出。 將2次熱可塑性材料部切斷，觀察斷面之結果，彈簧 -24- (19) (19)200305494 回復之構造被承認。 實施例6 ; 本貫施例中，於丨次熱可塑性材料，2次熱可塑性材 料中’使用發泡劑主修補聚苯乙烯E V - 3 0 6 G (含有永和化 成工業（株）製發泡劑30重量％ ) 7重量％的點與實施 例3相異。其中作爲射出成型裝置，使用如第i圖及第2 圖所示之射出成型裝置及模具。模具係如第4圖及第5圖 所不爲爲/成型汽車用門板所用，在第2圖之斷面圖中， 揭示有目視界線部34附近。 比較例1 ; 在本比較例中，於i次熱可塑性材料中使用 ΜX- i 64 的點’與實施例1相異。也就是，因爲1次熱可塑性材料 與2次熱可塑性材料爲相同材料，所以將2次熱可塑性材 料射出之時間T 1將不存在。 比較例2 ; 將作爲1次熱可塑性材料之聚丙烯（出光石油化學（ 株）製MX-164) 射出充塡，先成型門板下部5其後再作 爲2次熱可塑性材料之聚丙烯（出光石油化學C株）製卜 9 5 0HP )射出充塡，而成型門板上部3 i的點，與實施例1 相異。也就是，由最終收縮率5較小之熱可塑性材料射出 -25- (20) (20)200305494 (成型品之評價項目） (1 )關於目視界線部3 4之毛邊發生的有無，以目視 來確認。特別是，檢查在門板的兩側面部有沒有毛邊的發 生。 (2 )關於在目視界線部34的彎曲變形，將擴大成與 成型品幾手相同尺寸之目視界線部3 4的圖面與成型品相 比較來評價。 C成型品之評價） 在本發明之實施例1〜6中，所射出之1次熱可塑性材 的收縮將進行，當因成型收縮量之內殘留收縮量的收縮率 變成與2次熱可塑性材料之成型收縮率相等時，於2次熱 可塑性材料射出空間中，使2次熱可塑性材料射出。結果 ’在門板成型品之上部與下部的接合面（目視界線）上， 幾手沒有檢測出殘留應力。此爲推斷因爲在2次熱可塑性 材料被射出後，在1次熱可塑性材料與2次熱可塑性材料 之接合面上，所進行之收縮的收縮率變成相同。對此，在 比較例1、2中，觀察出視界線之紊亂。 產業上之利用可能性 本發明係爲成型收縮率相異之2種熱可塑性材料之一 體成型方法，在能利用於汽車用門板等由2種熱可塑性材 料所成型之物品製造之同時，也能利用於汽車用門板之汽 -26- (21) (21)200305494 車用門的製造。 【圖式簡單說明】 第丨圖 爲揭示有關本發明之第1實施形態。使用 熱可塑性材料之一體成型方法之射出成型機的斷面圖。 第2圖 爲有關前述實施形態之模槽及可動區塊之 擴大斷面圖。 第3圖 爲有關本發明之第2實施形態之模槽及可 動區塊之擴大斷面圖。 第4圖 爲有關本發明之實施例中以熱可塑性材料 之一體型方法所成型之汽車用門板的正面圖。 第 5圖 爲有關前述實施例中以熱可塑性材之一體 成型方法所成型之汽車用門板之斷面圖。 第6圖 爲揭不有關前述實施例各次熱可塑性材料 之收縮率與時間的關係圖。 元件對照表 1 :射出成型機 2 :模槽 3 :固定模板 4.1 5 A · 1 5 B :汽缸 4A.i6A.16B:活塞桿 5 :固定板 7 :移動模板 -27- (22) (22)200305494 8 :軸節機構 10 :進退機構 1 1 A . 1 1 B :可動區塊 i 2 :第一盤構件 1 2 A : —次熱可塑性材料射出空間 1 2B :二次熱可塑性材料射出空間 1 3 :第二盤構件 14 :導引桿 _ 20A.20B :氣體栓 2 L A . 2 1 B :氣體注入裝置 2 2A.22B ：澆口套襯 2 7 :油壓元件 28A.28B:射出裝置 29 :控制裝置 30 :汽車用門板 3 1 :汽車用門板上部 · 3 2 :汽車用門板下部 3 3 :厚肉部 -28-After the primary thermoplastic material is completely filled, the movable block 1 1 B is retracted by 5.5 minutes to form a secondary thermoplastic material injection space. In this space, polypropylene, which is a secondary thermoplastic material (MX-164 manufactured by Idemitsu Petrochemical Co., Ltd.), has a capacity of only 3.5 mi thickness, and is charged at a resin temperature of 20 ° C. The time from the completion of the second thermoplastic material to the end of the second thermoplastic material is 10 seconds. Immediately after filling, the movable block 1 1 B is advanced 2 _, so that the polypropylene is filled and shaped. After the secondary thermoplastic or the material is sufficiently cooled, the molded product is taken out. Once, the secondary thermoplastic material is not injected into the thick meat part. 0 -22- (17) (17) 200305494 Example 4; This implementation In the example, the point at which the primary thermoplastic material is laminated on the secondary thermoplastic material in the visual line portion 34 is different from that in the first embodiment. That is, as the injection molding apparatus, the injection molding apparatus and the mold shown in Figs. 1 and 3 are used. As shown in Fig. 4 and Fig. 5, in order to form a door panel for an automobile, the vicinity of the visual line portion 34 is disclosed in the sectional view of Fig. 3. When the mold is closed, the movable block 1 i A is backed up by 5.5 bandits to form a space for injection of the thermoplastic material once. In this space, polypropylene (J-950HP manufactured by Idemitsu Petrochemical Co., Ltd.), which is a primary thermoplastic material, is injected with a resin temperature of 200 ° C and a mold temperature of 40 ° C. Alas. Immediately after the filling, the movable block 1 i A is advanced 2 awake, and the polypropylene is filled. During the period when the filled resin is completely hardened, gas is injected into the gas pipe to form the thick meat portion 3 3 in a single heating After the filling of the plastic material is completed, the movable block 1 i B is retracted by 5.5 mm to form a second thermoplastic material injection space. In this space, polypropylene, which is a secondary thermoplastic material (MX-164 manufactured by Idemitsu Petrochemical Co., Ltd.), has a capacity of only 3.5 minutes, and is charged at a resin temperature of 200 ° C. The time from the end of the first filling of the thermoplastic material to the end of the second filling of the thermoplastic material is 10 seconds. Immediately after filling, move the movable block i 1 B by 2 mm to fill the polypropylene. During the period when the filled resin is completely hardened, inject -23- (18) (18) 200305494 gas into the gas pipe to shape it. And form a thick meat portion. The secondary thermoplastic material is sufficiently cooled to remove the molded product. Example 5; As the injection molding apparatus, an injection molding apparatus and a mold as shown in FIG. 丨 and FIG. 2 were used. As shown in Figs. 4 and 5, the mold system is used for molding automobile door panels. In the sectional view of Fig. 2, the vicinity of the visual line portion 34 is disclosed. When the mold is closed, the movable block i 1 A is retracted by 3.5 mm to form a primary thermoplastic material injection space. In this space, polypropylene (950 HP, manufactured by Idemitsu Petrochemical Co., Ltd.), which is a primary thermoplastic material, is injected at a resin temperature of 200 ° C and a mold temperature of 40 ° C. After the charging is completed, the movable block 丨 1 B is retracted by 2.5 mm to form a space for 2 times of thermoplastic or material. In this space, polypropylene (mostly L manufactured by Idemitsu Petrochemical Co., Ltd.) as a secondary thermoplastic material is injected and charged at a resin temperature of 200 ° C. It is 10 seconds from the end of filling of the thermoplastic material once to the end of filling of the thermoplastic material twice. 2 seconds after filling (when a skin layer is formed on the surface and the inside is molten), the movable block 1 1 B is moved backward 1 ugly, and the thickness of the space where the thermoplastic material is ejected twice is 3.5 mm. After the secondary cooked plastic material is sufficiently cooled, the molded product is taken out. After cutting the thermoplastic material part twice and observing the cross section, the structure of the spring -24- (19) (19) 200305494 was recognized. Example 6; In the present example, the use of a foaming agent to repair polystyrene EV-3 0 6 G (including the foaming made by Yonghe Chemical Industry Co., Ltd.) was used in primary thermoplastic materials and secondary thermoplastic materials. The agent is 30% by weight) and 7% by weight is different from Example 3. Among them, as the injection molding device, an injection molding device and a mold as shown in FIG. I and FIG. 2 are used. As shown in Figs. 4 and 5, the mold is not used for / molding an automobile door panel. In the sectional view of Fig. 2, the vicinity of the visual line portion 34 is disclosed. Comparative Example 1; In this comparative example, the point of using MX-i 64 in the i-th thermoplastic material is different from that of Example 1. That is, since the primary thermoplastic material is the same material as the secondary thermoplastic material, the time T 1 at which the secondary thermoplastic material is ejected will not exist. Comparative Example 2; Polypropylene (MX-164 manufactured by Idemitsu Petrochemical Co., Ltd.) as a primary thermoplastic material was injected and filled, and the lower part 5 of the door panel was molded first, and then polypropylene (Idemitsu Petroleum) The chemical C strain) (produced 950 HP) was injected and filled, and the point at which the upper part 3 i of the door panel was molded was different from Example 1. That is, injection of a thermoplastic material with a small final shrinkage ratio of 5-25 (20) (20) 200305494 (evaluation item of a molded product) (1) The presence or absence of the burr of the visual line portion 34 is visually determined. confirm. In particular, check for burrs on the sides of the door panel. (2) The bending deformation at the visual line portion 34 is evaluated by comparing the drawing of the visual line portion 34 enlarged to the same size as the molded product with the molded product. C. Evaluation of molded products) In Examples 1 to 6 of the present invention, the primary thermoplastic material will shrink once. When the shrinkage rate due to the residual shrinkage within the molding shrinkage becomes the same as the secondary thermoplastic material, When the molding shrinkage ratios are equal, the secondary thermoplastic material is ejected in the secondary thermoplastic material injection space. As a result, several hands did not detect residual stress on the joint surface (visual line) between the upper part and the lower part of the door panel molded product. This is presumably because after the secondary thermoplastic material is injected, the shrinkage rate of the shrinkage performed on the joint surface of the primary thermoplastic material and the secondary thermoplastic material becomes the same. In contrast, in Comparative Examples 1 and 2, disturbances in the horizon line were observed. INDUSTRIAL APPLICABILITY The present invention is a one-piece molding method for two types of thermoplastic materials with different molding shrinkage ratios. It can also be used in the manufacture of articles molded from two types of thermoplastic materials, such as automobile door panels. It is used in the manufacture of automobile door panels. -26- (21) (21) 200305494 Manufacturing of automobile doors. [Brief Description of the Drawings] Fig. 丨 is a view showing a first embodiment of the present invention. Sectional view of an injection molding machine using a one-piece molding method of thermoplastic materials. Fig. 2 is an enlarged sectional view of the mold groove and the movable block in the foregoing embodiment. Fig. 3 is an enlarged sectional view of a die groove and a movable block in accordance with a second embodiment of the present invention. Fig. 4 is a front view of a door panel for an automobile which is formed by a body molding method according to an embodiment of the present invention. Fig. 5 is a sectional view of a door panel for an automobile molded by a one-piece molding method of a thermoplastic material in the foregoing embodiment. Fig. 6 is a graph showing the relationship between the shrinkage rate and the time of the thermoplastic material in each of the previous embodiments. Component comparison table 1: Injection molding machine 2: Mold slot 3: Fixed template 4.1 5 A1 5 B: Cylinder 4A.i6A.16B: Piston rod 5: Fixed plate 7: Mobile template-27- (22) (22) 200305494 8: Shaft joint mechanism 10: Advance and retreat mechanism 1 1 A. 1 1 B: Movable block i 2: First disc member 1 2 A: —Second thermoplastic material injection space 1 2B: Secondary thermoplastic material injection space 1 3: Second plate member 14: Guide rod 20A.20B: Gas plug 2 LA. 2 1 B: Gas injection device 2 2A.22B: Gate bushing 2 7: Hydraulic element 28A.28B: Injection device 29 : Control device 30: Door panel for automobile 3 1: Upper part of automobile door panel · 3 2: Lower part of automobile door panel 3 3: Thick meat part -28-