123棋牌室

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                  河北华利机械配件有限公司

                  冰箱门拉手的成型工艺分析及注射模设计

                  2013/5/3 11:44:34

                  1 塑件及结构分析

                           图1、图2 为我公司开发的某冰箱上的门拉手零件1 和门拉手零件2,材料为ABS,乳白色, 要求在同一模具中生产这2 种不同的零件, 采用HT-350H 型注射机生产。门拉手用于安装冰箱的门外壳,是冰箱极其重要的外观件。从图1、2 中可见, 零件1 和零件2 正面、顶面及背面均为外观面,形状均为不规则的薄壁异形件,产品最大轮廓552mm×61mm×45mm, 侧面型腔较深,外表面结构形状杂,拼接面多,零件1 和零件2 内表面加强筋排布较多。由于门拉手为外观件,所以要求外表面光滑美观、无划伤、无磨伤、无熔接痕、收缩痕、顶白、变形等外观缺陷,安装部位尺寸要求准确。这无疑给模具的设计、制造及装配提高了要求。

                               TU1   MENLASHOULINGJIAN

                  2 塑件的工艺分析及模具结构分析

                         SUJIANBIAOMIANZHILIANGYAOQIUGAO,WAIXINGTIJIDA,XINGQIANGSHEN,WAIBIAOMIANXINGZHUANGFUZA,CHANPINBUYICHENGXING;NEIBIAOMIANJIAQIANGJINDUOQIEJINSHEN,BUYIZHUMAN,TUOMOZULIDA。XINGQIANG、XINGXINXIANGPINMIAN、PEIHEMIANDUO,JIAGONG、PEIHEDOUJIAOMAFAN,MOJUPEIHEJINGDUHEZHUANGPEIJINGDUYAOQIUGAO。


                  2.1 分型面位置的确定

                         CONGCHENGXINGGONGYIKAOLV, GAICHANPINFENXINGMIANYOULIANGZHONGFANGANXUANZE:①JIANGFENXINGWEIZHIXUANZAICHANPINDEZHENGMIANR LIANJIEM CHU,CAIYONGZHENGTISHIXINGQIANGCHENGXING,DANZAICHANPINZHENGMIANR CHUHUILIUYOUFENXINGXIANHENJI, YINGXIANGWAIGUANZHILIANG,JIAGONGSHIFENFUZA;②JIANGFENXINGWEIZHIXUANZAICHANPINDEZHENGMIANYUDINGMIANR DEJIAOJIECHUⅠCHU、BEIMIANⅡCHU, ZHENGMIANⅢCHU,RUTU1、TU2 SUOSHI,CAIYONGXINGQIANGZUHECHENGXING,XINGQIANGYOUHUADONGXINGQIANGHEGUDINGXINGQIANGZUHEERCHENG。WEITIGAOCHANPINWAIGUANDANGCI,FANGBIANLINGBUJIANJIAGONGZHIZAO,FENXINGMIANDEQUEDINGXUANYONGDIERZHONGFANGAN,TONGSHIJIMOJUDEZHUANGPEIJINGDUTIGAOLEYAOQIU。CHANPINWEIZHIBAIFANGTURUTU3 SUOSHI。

                  TU2  MENLASHOULINGJIAN

                   2.2 浇注系统的确定

                          TONGCHANGGAIZHONGCHANPINDEJIAOKOUDOUXUANZAICHANPINBEIBUDEBIANYUANCHU,CAIYONGJUXINGJIAOKOUJINLIAO,DANRONGYISHIJIAOKOUCHUCHANSHENGWUZHUANG、BANHENDENGQUEXIAN,BUYIDIAOZHENG。WEIBUSHICHANPINWAIGUANBIANYANCHULIUXIAJIAOKOUHENJIHEXIANGGUANQUEXIAN,JIAOZHUXITONGJUNCAIYONGZAICHANPINBEIBUDEJIAQIANGJINSHANGQIANFUJINLIAO,LIANGDIANJINLIAOFANGSHI。WEIBAOZHENGLIANGQIANGJINLIAOPINGHENG,JIAOKOUDAXIAOXUANYONGBUTONG。TU3 WEIGAIMOJUDELIUDAOWEIZHIBUZHITU。

                  TU3  MENLASHOULIUTONGBUZHITU

                  2.3 侧向分型抽芯机构的确定

                         HUADONGXINGQIANGYONGYUCHENGXINGCHANPINDEZHENGMIANHEDINGMIANDEYIBUFEN,YOUYUCHOUBAJUHENDA,JUNCAIYONGXIEDAOZHUZHENGTIWAICECHOUXINJIGOULAISHIXIAN。

                  3 模具结构及工作过程

                          GUOCHENG:DANGMOJUKAIQISHI,KAIMOLITONGGUOXIEDAOZHUZUOYONGYUCEHUAKUAI, QUDONGCEHUAKUAIZAIDONGMOBANSHANGDEDAOHUACAONEIZUOCEXIANGYIDONG,WANCHENGXIEHUAKUAI5 HE15 DECEXIANGCHOUXINDONGZUO。DANGMOJUKAIQIDAOZHONGDIANWEIZHISHI,ZAILALIAOGANYUXINGXINBAOJINLIDEZUOYONGXIA,SUJIANJIFENLIUDAONINGLIAOCONGXINGQIANGZHONGLACHUBEILIUZAILEDONGMOYICE,ZHUSHEJITUIDONGDINGCHUJIGOUYUNDONG,DINGCHUBANDAIDONGLALIAOGANJIDINGGANTONGSHIXIANGQIANYUNDONG,JIANGSUJIANDINGCHU。ZHICI,YIGEGONGZUOXUNHUANJIESHU。

                  4 模具关键部位的设计

                  4.1 浇注系统设计

                         浇注系统的设计,应考虑到进料均衡,双型腔模具应保证各腔的充注压力始终保持一致, 因此流道的布置采用平衡进料的方式,如图2 所示。采用两点浇口平衡进料,使熔体流动均匀,填充迅速,不仅可以便于成
                  123棋牌室 型,提高塑件的成型质量,而且可以有效降低翘曲变形。分流道断面采用U 形结构,易于机械加工,且热量损失和流动阻力小。为提高产品外观质量,采用潜伏浇口成型,位置设置在塑件的背部加强筋上,为保证充模压力一致,两腔浇口大小采用不一致,用Z 形拉料杆拉断冷料。

                  4.2 主要成型零部件设计

                  (1)XINGQIANGDESHEJI。

                            型腔是用来成型制品外表面的成型零件。为提高模具强度刚度,组合型腔分别采用整体式结构,整体加工。材料采用进口P20。P20 预硬钢是在中碳钢中加入适量合金钢, 淬透性高, 调质后的使用硬度为36~38HRC, 其抗拉强度为133MPa, 不但机械加工性能好,而且抛光性能优良,耐磨性、抗疲劳性能好。
                  123棋牌室 (2)型芯的设计。

                          XINGXINYONGLAICHENGXINGZHIPINDENEIBIAOMIAN。WEIJIESHENGYOUZHIMOJUGANGCAI,YEBIANYUJIJIAGONGHERECHULI,XINGXINCAIYONGZUHEXINGXINJIEGOU,FENKUAIJIAGONG,CAILIAOCAIYONGGUOCHANP20,32~35HRC。

                  (3)CEXIANGFENXINGCHOUXINJIGOUSHEJI。

                          HUADONGXINGQIANGDECHENGXINGCAIYONGXIEDAOZHUWAICECHOUXINJIGOULAISHIXIAN。XIEHUAKUAIYUHUADONGDAOGUIYINGBAOCHIHELIDEPEIHEJIANXI,BAOZHENGCECHOUXINNENGSHUNLICHOUCHU。XIEHUAKUAICAIYONGYOUZHIHEJINCAILIAO,BINGJINXINGBIYAODEDUANDAHEBIAOMIANCHULI,YINGDUDAYU55HRC。ZAIPILIANGSHENGCHANZHONG, XIEHUAKUAIHEDAOGUIPINFANMOCAHEPENGZHUANGERFASHENGMOSUN,DANGMOSUNDAOYIDINGCHENGDUSHI,HUIYANZHONGYINGXIANGXIEHUAKUAIDEHENGXIANGYUNDONGZUIZHONGDAOZHICHOUXINSHIBAI,SUOYIXIEHUAKUAIYUDAOGUIJIXINGXINMIANJIECHUDEBIAOMIANYAOJINXINGBIAOMIANCUIHUO,YIZENGJIANAIMOXING。

                  4.3 导向机构的设计

                          本模具采用导柱和导套机构导向。导柱的布置方式采用等直径导柱的对称布置方式。导柱和导套应有足够的耐磨性。导柱材料为T10A,淬硬50~55HRC,数量为4 个。为了使导柱能顺利地进入导套,导柱端部做成锥形。导柱滑动部分的配合精度采用过盈配合
                  H8/r7, 导柱固定部分的配合精度采用过盈配合H8/s7。导套外径的配合精度采用过盈配合H8/s7。

                  4.4 脱模机构设计

                  123棋牌室        CHANPINCAIYONGBANYUANDINGGANHEBIANDINGGANLIANHEDINGCHU。WEIQUEBAOSUJIANZAICHUMOGUOCHENGZHONGBUQINGXIE,BUBIANXING,DINGCHUJIGOUPINGWEN,DINGCHUJIGOUSHEDINGCHUDAOXIANGZHUANGZHI。

                  4.5 冷却水的设计

                          MENLASHOUDUIZHIXIANDUYOUJIAOGAODEYAOQIU,YINCIZHENGCHANGSHENGCHANSHIMOWENJINKENENGJUNYUNYIZHI,JIANSHAOZHIJIANBIANXING。GENJUCHANPINXINGZHUANGFENBU,DONG、DINGMOFENBIESHEZHILENGQUESHUILU。LIANGQIANGGENJUXINGZHUANGDEFUZACHENGDUXUANYONGDELENGQUESHUILUDESHULIANGBUXIANGTONG。WEIFANGBIANWEIXIU,CAIYONGKUAISUSHUIZUI。

                  华利胶木手轮

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