Our customers’ molding systems
Injection molding is the best known and used molding formula. This method features manifold cavity feeding options: injection with a thin film or veil, direct injection, slide injection, capillary injection, “banana” injection. We choose how to inject the compound into the cavity taking into account the technical and aesthetic constraints that are imposed on us.
Thermo-regulated injection molding
The thermo-regulated injection system consists of a metallic distributor inserted in the fixed part of the die, either branched or not depending on the number of figures on the die. This is properly balanced in the material flow ducts with the purpose to cushion and distribute evenly the injection pressure and the temperature of the molten material whose ducts end in a nozzle or tip from which the material flows out at injection time. Moreover, the thermoregulated room system may be provided with a shutter controlled by a piston in place of the pointy tip, for details that require direct injection on the workpiece without an injection witness. The advantages of this technique are first of all the savings on material (by eliminating the sprue/s), better management of the die’s temperature and conditioning, and time-related savings on extraction and routine die maintenance.
Despite being one of the first molding systems, it is still widespread, especially among businesses for which labor costs are not overly binding. The rubber to be processed must first be prepared: generally calendered into sheets of suitable thickness and then cut into pieces of the desired sizes and weight, or extruded first as rounds or other shapes and then always cut at the suitable size and weight. Compression injection consists in placing the prepared rubber with its appropriate shape and weight inside the open heated die, which is only subsequently closed under pressure for a time long enough to let the rubber vulcanize into its new and definitive shape.
This type of solution is very common in the production of small parts. With this solution there is no bound distribution of the compound through the filling ducts. A quantity of compound calculated so as to be enough to fill all its cavities is injected in a semi-closed die. After the injection comes the compression step, in which the compound vulcanizes within the cavity. The end result is a single piece encompassing all the cavities, also known as “pizza” or “cake”. This pizza or cake undergoes next a specific deburring process and the result will fit the customer’s needs. With this approach, large quantities of parts can be molded in a very short time and with very little waste.
Rubber, plastics and thermoplastics. The technology and finishings of Tecnistamp dies can manufacture any kind of object using these molding materials.