Introduction to the hottest laminated die technolo

Introduction to laminated mold technology (Part 2)

so far, Engel company has a demonstration mold of this type manufactured by high tech plastic company in Austria. It shows that new opportunities are emerging for multi-component laminated dies in automotive applications. At the k2001 exhibition, Engel produced the left and right front lampshades, which are composed of transparent polycarbonate (PC) and a black PC frame along the edge

unlike other technologies, CaCO Pacific's multiple injection technology is applicable to the design of laminated molds without rotatable central parts. The full servo driven low inertia technology system separates the mold core from the mold body, and fixes them on the rotating horizontal rod installed on a mold surface. Two sets of cores are installed on the rod, one up and the other down. The rod is connected to the half of a mold by means of a guide rail. During the molding process, the core is flush with the die surface. One material is injected into the upper row of cavities, while the second material is simultaneously filled into the lower row of cavities, using two American CaCO Pacific hot runner. When the clamping device is opened, the core rod slides away from the mold surface to allow the core rod to rotate 180o. A demoulding rod pushes the formed product out of the lower group of cores, and then the rod slides back to the mold surface, and the mold is closed

the mass of this rotary core rod is relatively light, and it is rotated by a small servo motor installed at the end, which mainly adopts dry ice or liquid alcohol adding part. The rotation process is shorter than 0.5s, said John Thirlwell, vice president of sales and marketing. He pointed out that if desired, the system allows a second injection and completely covers the first injection material

skills of various resins

gra blocks flame propagation and penetration. Both M company and ferromatik company/foboha company point out that the rotatable laminated mold has developed many unusual applications. One is thermoplastic/thermosetting plastics, or hot/cold forming. When forming, one material needs a hot mold to plasticize, while another material needs a cold mold to cure. Gram company designed a set of 2+2 cavity rotary laminated mold, which is used to process nylon with internal silicone rubber gasket for automotive parts. Although the purpose of nylon/silicon molding is to achieve good bonding between the two, gram and ferromatik/foboha use a four-sided rotating laminated element to achieve the opposite effect. If the first product has been cooled thoroughly enough before overlapping injection molding, Jinmin new material, a well-known material supplier of the two components of the final product, has made a new breakthrough in the technology of spray free products and can slide freely relative to each other

gram uses this method to demonstrate the molding of a valve, in which one part slides in another part. Another example is a screw cap with a nozzle used for molding a juice box with a triangular top surface. First, shape the PP copolymer cover of the juice box, spin out the core, and then use a group of new cores to shape the LDPE nozzle inside the cover. Because the cooling time of the cover is long for an additional cycle, and the melting temperature of LDPE for the second injection is low, the cover and the nozzle will not stick together

breaking the barrier of size

laminated die technology broke through the barrier for the first time and entered the application field of forming large parts on machines larger than 1000 t. Plastcoat is using Husky's double-layer laminated mold with a cavity on each side to produce front and rear rotating lights for Ford's XLT truck at the same time. Another 1+1 laminated mold is manufacturing rocker arms for Toyota Camry production line. Each of these parts is several feet (FT) long (1ft=0.30 m), and 300 g of thermoplastic polyolefin (TPO) is used. This part is formed on the 2200 t ewll (widened and lengthened) two plate forming machine of husky company

the main advantage of laminated molds is to save floor space, said Rebecca Branca, manager of molding operations. The cycle time is generally consistent with the molding mold running on two different machines with the same tonnage capacity, she said

this mold has a unique sprue bar running under the mold. It distributes the melt to the carrier of the laminated die. The carriage has a unique hot runner system that feeds the two moulds. The runner designed by Husky makes the melt system always in equilibrium, even if the parts on side a and side B are different, said Roy Zinner, manager of molding and maintenance department

when the mold is opened, the runner rod is divided into two halves, one half is connected to the fixed template, and the other half is connected to the laminated mold bracket. A coordinated rod pulls all parts of the mold together to close the mold. This rod can be adjusted to adapt to different mold heights on both sides. Plastcoat produces about 600 parts per shift