模具滑移注射成型模具滑移注射成型:DSI模具滑移注射成型是（株）日本制钢所（株）日本制钢所为空心体和积层结构体的注射成型而开发的一种新的成型技术。就其原理而言，它包含 DSI-2M 和 M-DSI 两种工艺。在中，两个半开空心体的次成型品与模具一起滑动，闭模后，向其接合面注射次树脂以使其接合，从而获得空心体。则是在非空心结构中将种树脂层叠在一起。模具应有油压缸驱动的滑移机构。注射筒分为头式（种材料），和头式（种材料）两种。需要使用既可分别设定次半开体的成型条件和次接合树脂的成型条件，又可控制模具滑移和滑芯等的油压动作的专用成型机器。 动画动画 动作过程(1) 从筒（图中标为绿色）注射，然后成型为箱和盖。(2) 模具打开后，盖被移至固定侧，而箱则被移至移动侧，主流道和分流道落下。(3) 移动侧的模腔滑移，盖和箱体通过合模而对齐，树脂从筒（图中标为红色）射出后流至接合处。(4) 模具打开后，制品以及主流道和分流道被顶出。1. 无需粘合、组装等后加工。2. 与吹塑和该 GAI 成型相比壁厚更易控制。3. 表面特性和尺寸精度良好。4. 产品设计的自由度高。（可进行一体化成型并可将加强筋（rib）和轮毂（boss）设置在空心内。）5. 即使接合面呈维凸凹不平形状也可应对。6. 无需丢失模芯（lost core）和吹塑那样的后处理工序，从而节省了人力。7. 可将嵌入件插入空心品内来进行组装封装成型。1. 模具滑移的动作和定位精度非常重要。2. 必须设法使次成型品切实保持在固定侧。 3. 需要有次成型时的脱模对策。 4. 次成型时会在箱上形成环状，因此分流道浇口设计很重要。 5. 1 次成型品最好应有对接校准设计。 6. 接合部的形状设计（流道的宽度和深度、焊缝等）会影响气密性。7. 需要有接合部的隔热设计。 8. 还需要有接合部焊接对策（排气口、溢流等）。使用试验模具所做的接合特性评价的结果表明，作为结晶性工程塑料的 Duracon、Duranex 以及 Fortron 都具有充分的接合特性，并有望应用于各种项目。 成型条件概述成型条件概述 机筒温度模具温度DuraconDuranexFortron用下面的成型品来进行耐压试验。PrinciplePrincipleDSI is a new molding technology developed by JapanJapan SteelSteel Works,Works, Ltd.Ltd. to injection mold hollow moldings or laminated structures. It contains 2 processes of DSI-2MDSI-2M and M-DSIM-DSI. In DSI-2MDSI-2M, one of the initially molded half portions of a hollow molding is slidden together with the movable half of the mold so as to be fitted with the other half remaining in the fixed half of the mold, and then they are joined together by secondary molding around the fitted area after the mold is closed. In M-DSIM-DSI, 2 kinds of resins are laminated to form solid structure.The mold must have a sliding mechanism driven by a hydraulic cylinder. The injection cylinder is equipped with either 2 heads for 2 kinds of materials or one head for just one material. It is necessary to use special injection molding machines, in which respective molding conditions for primary and secondary molding can be set, and also the control of hydraulic operation for die-sliding, slidecores, etc, is possible.DSI-2MDSI-2M process animation M-DSIM-DSI process animation (1) A case and a cap are molded by the injection from the “A“ cylinder shown in green in the figure.(2) The mold is opened, and the cap remains in the fixed half of the mold while the case moves to the movable half of the mold. The sprue and the runner drop out of the mold.(3) The movable half of the mold containing the case slides so as to fit the case with the cap by the mold clamping. Then the case and the cap are joined together with the molten resin injected from “B“ cylinder shown in red in the figure.(4) The mold is opened, and the products as well as the sprue and the runner are ejected.2.Characteristics2.Characteristics andand effecteffect 1.Post-molding processes such as adhesive joining and assembly are not required. 2.Controlling wall thickness is easy compared with blow molding or GAI molding. 3.Surface appearance and dimensional accuracy are excellent. 4.Higher design freedom. Namely, one-piece molding, or installation of ribs and bosses inside the hollow is possible. 5.This process is applicable even if the joining surface is three-dimensionally uneven 6.Such post-molding processes as required for lost-core process or blow molding are not necessary and so the reduction of manpower is possible. 7.Assembly or encapsulation molding becomes possible by installing inserts inside the hollow. 3.Points3.Points forfor considerationconsideration inin designingdesigning productsproducts andand moldsmolds 1.The accuracy in the movement and the positioning of die-sliding is very important. 2.It is necessary to elaborate a sure means to keep the cap portion in the fixed half of the mold during the initial molding. 3.Means to facilitate mold release are required for secondary molding. 4.Since the secondary moldings are in the form of a ring, runners and gates should be designed accordingly. 5.The design of butt fitting between 2 portions made by the initial molding is desirable. 6.The shape of the joining portion such as the width and the depth of the flow path, and the welding bead is very influential in hermetic sealing. 7.Thermal insulation in the joining portion is necessary. 8.Measures to prevent the generation of weldlines such as vents, overflows, etc. are also necessary. 4.Resistance4.Resistance ofof jointsjoints mademade ofof ourour materialsmaterialstoto internalinternal pressurepressureThe joining characteristics were evaluated by using the trial mold shown below. Our materials DURACON, DURANEX and FORTRON, all of which are crystalline engineering plastics, showed sufficient joining characteristics and their application to various items is expected. Outline of molding conditions Cylinder temperatureMold temperatureDURACON20080DURANEX25080FORTRON320150The pressure test was conducted by using the moldings shown below.