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Technologies
Techmire is at the forefront of manufacturing innovation, offering a suite of advanced technologies designed to enhance efficiency, precision, and quality. Our machines feature state-of-the-art features such as multiple-slide technology for complex part geometries, a user-friendly computer-based system for streamlined operation, the process parameters and shot monitoring system (PPCS) for real-time data analysis, and closed loop control of the injection system for precise material delivery. These technologies work in synergy to deliver exceptional performance and ensure consistent, high-quality products.
Multi-Slide
This technology offers numerous advantages, including the ability to produce complex part geometries with high precision and consistent quality across parts. Equipped with 4 to 6 sliders, it ensures excellent conformity from one piece to the next, allows for quick die changeovers, and enables in-die de-gating along with automatic separation of parts from runners in many cases. The process also yields flash-free castings, rapid cycle speeds, and low tooling costs. Additionally, it minimizes or eliminates the need for secondary operations, resulting in significant savings in materials, energy, and labor.
Our multiple-slide hot chamber machines are used primarily for zinc, copper, magnesium, lead and other low melting point alloys that do not readily attack and erode metal pots, cylinders and plungers. The injection mechanism of a hot chamber machine is immersed in the molten metal bath of a metal holding furnace. The furnace is attached to the machine by a metal feed system called a gooseneck. As the injection cylinder plunger rises, a port in the injection sleeve cylinder opens, allowing molten metal to fill the injection sleeve cylinder. As the plunger moves downward it seals the port and forces molten metal through the gooseneck and nozzle into the die cavity. After the metal has solidified in the die cavity, the plunger is withdrawn, the die opens, and the casting is ejected.
Computer Based System
The Techmire control system incorporates a graphical user interface, featuring ease of part programming, machine set-up, program storage and retrieval, integrated access control, and an error messaging system with online “help”. The control system software is proprietary to Techmire.
Remote diagnosis of any difficulties with the machine can be undertaken via VPN and a network card.
Process Parameters and Shot Monitoring System (PPCS)
The Techmire process parameters and shot monitoring system (PPCS) permits the machine operator to set specific values for over 25 critical production parameters (e.g., temperatures, injection speed, and fill time). Each process parameter can be programmed with upper and lower control limits.
The shot monitoring portion of the PPCS is an excellent diagnostic tool for operators and process engineers. Graphs of shot profiles can be reviewed in real time on the machine controller or at a remote station linked to the controller via a network.
These critical parameters can be automatically transferred in a database onto a remote computer. The data can be transferred after each injection or once per day.
If an out of tolerance condition is detected, the PPCS can be programmed to take a number of actions, such as setting off an alarm, stopping the machine, or directing the components produced to a separate bin for later inspection. (The machine has a directional palette for this purpose.) All out-of-tolerance injections are logged with their respective parameters for subsequent analysis.
Closed Loop Control of the Injection System
A closed loop injection control system is available on all the Techmire machine models. The system permits real time control of the injection process from start to finish, resulting in stable system performance and premium part quality.
Three (3) variable velocity profiles can be programmed for use during the cavity filling phase, and two (2) variable pressure profiles for use during the compaction phase. The switch-over point from velocity mode to pressure mode is pre-selected based on displacement of the injection cylinder and pressure.
All settings of the real time control system for any given mold can be saved on the hard disk of the PC that controls the machine, along with mold sequence and PPCS settings. This greatly reduces the time required for a repeat set-up of the mold.
In addition to improving part quality, the closed loop system significantly reduces the “hammer effect” at the end of the injection, thereby minimizing flash.
