Plastic parts are shaped and dimensionally accurate as a function of the temperature of the injection mold during filling, solidification, and production efficiency. Different kinds of plastics have different mold temperatures scope, enabling plastic melt to fill the cavity with…
PET chemical name is polyethylene terephthalate, also known as polyester. At present, GF-PET is the most used among customers, mainly for preform injection. The rheology of PET in molten state is better, and the effect of pressure on viscosity is…
Why venting important？ In a sense, the injection mold is also a displacement device where the hot plastic melt enters the mold cavity while displacing the air in the mold cavity. In fact, the air in the mold is…
Transparent parts have their special characteristics and functionality. The poly-carbonate injection molding will inevitably be used for auto part. When injection molding, we often encounter some thick-walled transparent injection molded parts. For performance reasons, these plastic parts are made of…
Polycarbonate injection molding Topworks is a professional manufacturer of poly-carbonates injection molding. We have more than 10 years of production experience in poly-carbonates injection molding We have rich experience in producing extra wall thickness poly-carbonates and ABS/PC injection molding parts.…
Production and Handling of Tooling Selections of Types of Molds Molded components can be accomplished as a result of a few kind of molds and also by different types of mold structure. It is crucial that mold specifications and anticipated…
Designer Directory CHOICE A Self Improvement from SelfGrowth.com– – SelfGrowth.com is the most complete guide to information about Self Improvement on the Internet. Topsitenet.com
1.滑块导轨的高至少要为滑块高的1/3，以保証滑块稳定以及滑动顺畅。 2.有滑动摩擦的位置注意开设润滑槽，为了防止润滑油外流，不宜把槽开成“开式”，而应该为“封闭式”，一般可以用单片刀在铣床上直接铣出。 3.固定模仁的型腔，对小模一般用线割，这样可以提高模具的精度；而较大模的模腔一般铣削的形式加工出来，加工时注意其垂直度，并且为了防止装配时，模仁不到位，模框的四周应该用铣刀铣深0.2。 4.入子与模仁，模仁与模仁，模仁与模框的相互穿插一般要加1°的斜度，以防装配时碰伤。 5.入子的靠位部分长度公差为-0.02，大小公差为-0.10，模仁相对应的靠位公差为+0.02。 6.有C 角的入子最底端到C 角部位的公差为+0.01，以防跑毛边。 7. 本体模具的主体部分用NAK80 的材料，入子、梢等用SKH9、SKH51（材料处理：室化处理，也可以不要）的材料，必要时可以使用VIKING 材料。 8.画好部品之后，应先定滑块的位置、大小，防止发生干涉、及强度不够的现象，然后才定模仁寸法。 9.入子大小公差设为-0.01，模仁上入子孔对应的公差为+0.01。 10.模仁上的线割方孔尖角部分用R0.20 过度，对应的入子部分也为R0.20，以对应线切割时的线径影响，同时可以防止尖角部分磨损，而产生益边。 11.与定位珠相对应的小凹坑寸法一般为底径φ3 夹角90°-120°的圆锥孔。 12.固定侧的拔模角应该大于可动侧，以便离型留在可动侧；而且可以防止部品变形，尤其是壁薄，件长容易变形的零件，固定侧对它的拉力不均容易使部品翘曲，或留在固定侧。 13.对于侧面抽芯力大而部品精度要求又严的零件，最好采用二次抽芯结构。 14.斜梢的斜度+2°=压紧块的斜度（一般为18°或20°或22°）. 15.模具组立时，应该养成如下习惯： a.用空气枪清理模仁、模腔、入子、流道板、分模面的表面。 b.装配前用油石打光模仁、模腔、入子、分模面的表面，以便装配时顺tang。 c.注意清角，以防干涉、碰伤。 d.装配前应该考虑后面的工作如何进行。 16.大模具模仁的侧面压紧块应该设计成锁紧后底于分模面0.5-1.0mm,以防干涉。 17. PC+GF20 收缩率3/1000 18.POM 收缩率正常为20/1000，但有时局部会达30/1000。 19.为防止潜伏式浇口在部品顶出时刮伤部品，在流道离潜伏式浇口2-4mm 处增加一锲形块，高约为流道一半，夹角为单边10°，供顶出时折断浇口。 20.主流道拉料井，采用深8-10mm，夹角为单边10°，顶径为流道宽的倒圆锥；这样的好处是可防止单边磨成锲形的拉料在顶出时勾住流道，造成离型不良。 21.开闭器有两种： 1.橡胶制成，靠中心的螺杆调节变形量，来调节拉力。 2.用弹簧钢制成。其作用都为：延迟可动侧与固定侧的开模时间，应用于小水口模。 22.为了确保模具的顶针和斜销是否复位，有些模具安装了早回机构（母的装在108 板上，公的装在102…
Common problems during the transparent plastic injection molding Due to the high light transmittance demand of transparent plastic parts, the surface quality of plastic products should be very high, and there must be no markings, whitening,fog, black spots, discoloration, poor…
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