The application of Heat-Cool-Combinations will result in rapid and effective heating and cooling coupled with energy-efficiency.
Conventional systems such as HKK (ceramic) or HKC (ceramic with copper cooling fins) give fast heat-up times but without uniform temperature distribution along the heated area as achieved by the HAK system.Read more...
Many factors affect the cosmetic appearance of injection-molded plastic parts. Some of these are within the control of the part designer, and some are not. In this white paper we describe several of the factors affecting cosmetic appearance, the interactions between those factors, and steps the designer can take to improve final appearance.Read more...
The use of innovative CAE technologies has made it possible to drastically reduce the time required for process and product development. A new simulation tool for optimization of thermoset components has recently become available, and can be used for three-dimensional computation of the mould filling, cross-linking and internal stress buildup on a monitor. In contrast to conventional programs, the described program operates with volume elements deriving from the technology of injection moulding of plastics. The frequently three-dimensional geometries of thermoset components are thus depicted in a physically correct sense.Read more...
The majority of today’s consumer products — and many commercial ones — are composed of thermoplastics. When designing a new product, engineers can best predict its end performance by prototyping with a material as similar to it as possible. That’s why 3D printing with thermoplastics is so widely practiced. Using Fused Deposition Modeling (FDM®) machines, engineers have the option of making parts with the most commonly used thermoplastics, such as ABS, polycarbonate, a variety of blends, as well as engineered thermoplastics for aerospace, medical, automotive, electronic and other specialty applications. When using 3D printing for the production of finished goods, using a thermoplastic is all the more important, and it may be the only choice for many applications.Read more...
Two-shot silicone-thermoplastic molding molds both a silicone and thermoplastic part in one press, and in one process. These parts are traditionally molded individually and assembled as one completed medical device component. The two-shot process eliminates costly secondary operations and assembly — the main contributors to increasingly higher part costs. This process allows for increased part performance and more consistent part quality, due to the reduction of misalignments in traditional insert or overmolding. Two-shot also allows for the elimination of one tool and associated tool validation costs. By molding two parts in one process, this technology provides design engineers with increased freedom in part design. Two-shot eliminates the need to design for assembly. The process offers the complete removal of otherwise timely and costly process steps. Two-shot in turn allows medical OEMs to bring high-quality, low-cost medical device components to the market faster.Read more...
Injection molding (IM) — the process of injecting plastic material into a mold cavity where it cools and hardens to the configuration of the cavity — is best used to mass-produce highly accurate, and often complex, three dimensional (3D) end-use parts and products. However, the development of molds for this process is often painstaking, highly expensive and time intensive.Read more...
As China’s first and largest manufacturer of blown film equipment, Guangdong Jinming Machinery Co., Ltd.(www.jmjj.com) has been an industrial leader in China, with advanced multi-layer co-extrusion blown film technology. With the rapid development of the plastic packaging industry, customers have increasing demands for high-end equipments. To meet customer demands for automatic control and high-end performance, Jinming Machinery has successfully developed high-end SuperexTM series equipment, based on cutting-edge design philosophy and technology.
SuperexTM Blown Film Lines use advanced processing technology, dies and runners, and a new-generation high-efficiency multi-outlet cooling air ring independently developed and produced by Jinming Machinery to achieve high-degree automation and high productivity. Jinming Machinery is one of the few blown film equipment manufacturers using this technology in the world. Air ring cooling is crucial to the output, quality and physical properties of blown film products.
With the progress of film-blowing equipment technologies, the air ring design has been improved from the traditional one outlet and two outlets to multiple outlets, and from precision air rings to automatic air rings. Jinming Machinery’s proprietary new-generation high-efficiency cooling air ring has more than 3 outlets, and the air volume of each outlet is adjusted automatically according to the actual situation. The air ring can be lifted and lowered along the die axle center. The air flows through several sections to increase the contact surface with the film bubble, and thus prolonging the cooling time and improving the cooling efficiency. Besides, the pre-cooled film bubble will have higher melt strength. The air volume of the upper outlet can be increased without causing instability of the film bubble.
The SuperexTM equipment with the new-generation high-efficiency multi-outlet cooling air ring has the following features:
Increase of output
Jinming Machinery’s proprietary new-generation high-efficiency multi-outlet cooling air ring increases the cooling efficiency by more than 40% compared with common air rings (or automatic air rings) with double outlets in the China market. As a result, the output of the production line will increase by 40-50% when the extrusion capacity is ensured. Testing data show that the production capacity of a 300mm die is up to 420kg/h, which is ranked at the top in the industry.
Improvement of physical properties of film
After coming out of the die, the film bubble will first be pre-cooled at the lower air ring, and then blown up at the upper air ring so that the film bubble will have high strength and the products will have a high blown-up ratio. This cooling technique is similar to the POF and HDPE blow-up method.
Steady product precision control
Automatic air ring technology is used in the design of the upper air ring for blow-up cooling control and an online film thickness measuring system is used for automatic film thickness control. Because the upper air outlet is away from the high-temperature die and the film bubble is pre-cooled, the precision control of the automatic air ring is less affected by external factors to achieve good control stability and high efficiency.
Improvement of product quality
Different from the process in which the film bubble is blown up after being out of the die, the film bubble will not be blown up until it is pre-cooled. High polymer materials if stretched in quasi-viscous flow state will have a lower degree of crystallization, and thus the film transparency and mechanical properties will be greatly improved.
High cost performance
Compared with traditional air rings, the new-generation high-efficient multi-outlet air ring increases production capacity by 40-50% but the manufacturing cost increases by only 40%. The newly-increased cost will be recovered by the electricity expenses saved in six months.
For more information about Jinming SuperexTM high-performance blown film lines, please call (86)0754-89811333 or send email to email@example.com.