plastic mould and custom injection moulding tips

In a sense, the injection mold is also a displacement device where the hot plastic melt enters into the mold cavity while displaces the air in the mold cavity. In fact, the air in the mold is not limited to the cavity, especially the three-plate injection mold, and the air existing in the flow path cannot be ignored. In addition, the plastic melt produces a small amount of decomposition gas. These gases must be discharged in time If the venting performance of the mold is poor, it is easy to produce bubbles, silver streaks, clouds spot, short shot, scorch marks and other defects Therefore, a reasonable layout of the venting structure should be provided on the mold to avoid defective products caused by poor venting. https://www.youtube.com/watch?v=DecwAPl6pvU Venting slot For the molds for making large and medium-sized plastic parts, the amount of gas to be removed is large. Generally, the Venting slot should be cut on the side of the plastic mold on the parting surface. The position of ...

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 PC . When the average wall thickness exceeds 6mm and the MAX wall thickness is more than 12mm, the plastic parts often have two problems during injection molding: one is that the surface shrinks, and the other is the air bubbles inside the product. As to the thicker wall thickness, deformation is not the main problem. Injection molding of transparent PC plastic parts has the most problems: Shrinkage The main reason is that the wall thickness is too thick to lead to product shrinks. In this  process, more melt must be injected to prevent shrinkage, and a higher mold temperature is required to shrink the product as a whole (opaque products require to reduce the mold temperature...

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 the production of extra wall thickness poly-carbonates and ABS/PC injection molding part. Our PC injection molding covers the following industries： Automobile parts Medical instruments Aerospace Packaging field Electronic appliance optical lens LED lighting The maximum wall thickness of the PC product can reach 3 cm , but the surface does not shrink and there are no bubbles inside. https://www.youtube.com/watch?v=ms2aPfCHdzc&feature=youtu.be   EXTRA WALL THICKNESS POLY-CARBONATE INJECTION MOLDING CASE #1  CASE    [caption id="attachment_3326" align="aligncenter" width="1139"] extra wall thickness 32 mm poly-carbonate injection molding[/caption] [caption id="attachment_3325" align="alignnon...

How to Present Your Product Idea to a Design Firm   You have a product idea you want to take to market. Now what? Aspiring entrepreneur, tinker, engineer…Your mind runs 1,000 miles per hour thinking of the many different ways you can improve your environment. Just recently you have come up with a product idea that you know can benefit many different people. It’s worth a shot to try to develop it and take it to market — but how do you even start? If your idea is a physical product, this article is for you. We’ll walk you through exactly how to present your product idea to a design company — an activity that will serve as the beginning of the design phase of your project. We’ll cover everything you need to know in order to compile a presentation-style document that explains your idea to a design firm. It can be a standard presentation with slides or any document of your choice that includes relevant content.  You’re welcome to dive right into the sample pres...

  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 efficiency be arranged ahead of approval of the purchase. Except if the consumer has asked for usually, the molder has the right to figure out any type of mold and specifics of mold structure. Type and size of molding press best suited for generating suitable components customarily have been decided by the molder to make sure manufacturing on the cheapest way. Mold Preservation, Fix and/or Renewal Tooling made by a customized molder typically may be stored in a suitable situation and maintained for the standard duration of the mold. The traditional duration of the mold is frequently thought to be over if the consumer don't accepts the failed components made out of the mold ,as a consequence of flaws brought on by mold deterioration, that don...

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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...