There are thousands of plastic injection mold makers in China today. It makes lots of people confused about how to choose a plastic mold maker correctly or to pick up the right mold supplier for your project. Here are some guidelines you should know to help you out with the problem. 1st of all, we must know our requirements for the exact product for the project. Then we can sort out how to choose a right mold maker to manufacture our mold. Here we simply list the key points for different grand mold manufacturers as below: 1. Top Grand Injection Mold Manufacturers: A professional injection mold manufacturer has an experienced team for mold design, manufacturing, quality control, inspection, and many top machines in the industry. Including but no only: high-speed CNC lathes, CNC milling machine, CNC machining centers, mirror spark machines, slow-moving wire, precision grinders, high precision injection molding machines, two-dimensional, three-dimensional testing equipment, etc. It is suitable for molds with complete surface treatment, perfect interface, flawless product assembly, reasonable and standardized internal structure, and mold tolerance of about 0.02mm.
Read more →The PET preforms most used of PCO neck finish ( PCO = Plastic Closure Only ) are two types: PCO 1881 neck finish and PCO 1810 bottle neck finish. At the beginning of November 2006, the ISBT (International Society of Beverage Technologists) agreed on a new lightweight standard for 28mm preform neck finish called PCO 1881, which provides a weight saving of 1,3 g (26%) compared to current type bottle neck PCO 28 (3.74 g vs. 5.05 g) and of 2,5 g (40%) compared to BPF neck finish. In particular, it includes good venting capability due to sufficient thread length (650° thread travel, extendable to 680°) and adequate positioning of vertical slots across the threads; and efficient closure tamper-evident (TE) band functioning due to special TE bead profile. The SuperShorty PCO 1881 bottle neck is a 28-mm closure designed for a short-height PET preform neck finish. The biggest difference between PCO 1881 & PCO 1810 is the height of them. PCO 1881 is the with the height 17mm while PCO 1810 has 21mm. The neck finish PCO 1881 is about
Read more →The clamping force calculation of the injection molding machine is a compulsory course for all the injection molding engineers. Let’s talk about the calculation method of the clamping force in injection molding. The clamping force of the injection molding machine, also known as the clamping force, is the key to the molding of injection products. If the clamping force is too small, it will cause the product to have flash or lack of material. Too big clamping force will result in a waste resource and will cause premature aging of hydraulic components and mechanical structure wear. There and many injection molding machine tonnage calculation formulae. Below we will explain how to calculate clamping force with 4 clamping force formula one by one. Empirical formula: the core idea-to calculate the clamping force through the clamping force constant Calculation formula: clamping force = clamping force constant x projected area of the product p=kps Remarks: p=clamping force (t); kp=clamping force constant (t/cm2), s=projected area of the product on the template (cm2). There are 4 clamping force calculation formulae to calculate the clamping force
Read more →Injection molding cycle time calculation is one of the most important works for an injection molding engineer. Injection molding is a cyclic process. In order to calculate the cycle time, you should calculate operating cycle time for all the molding machine`s movement. The whole operating cycle time includes injection time/filling time, Pressurized Holding Time, Polymer Melting/Charging Time, Cooling Tim, Machines basic movement(Mold open & close) operating Time, Ejection, Drop, Robot Time, etc. Total injection molding production cycle time calculation formula: T=Ti + Tp + +Ts + Tm + Tc + To +Te
Read more →Plastic Mold Polishing Techniques is very important for plastic molds manufacturing. It affect a lot on the plastic molds` quality. It helps to get a beautiful surface and makes ejection smooth. Mold polishing generally uses oil stone, sandpaper, polishing paste, etc. to grind the cavity surface of the mold, so that the working surface of the mold can be as bright as a mirror. It is called mold polishing. Mold polishing has two purposes; one is to increase the finish of the mold, so that the surface of the product from the mold is smooth, beautiful, and beautiful, and the other is to make the mold easily demolded, so that the plastic is not stuck on the mold and cannot be taken off . Polishing is a very important process in the mold making process. With the increasingly widespread use of plastic products, the appearance quality of plastic products is also getting higher and higher. Therefore, the surface polishing quality of plastic mold cavity should be improved accordingly, specially Mirrors and high-gloss high-gloss surfaces require higher mold surface roughness and
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