Molding machines for thermoplastic sheeting basically take two forms: sheet roll feed and single sheet feed. The roll-fed thermoforming machine feeds rolls of sheet material or directly into a flow production line with a sheet extruder. The single-sheet feeding thermoforming machine is named after the pre-cut sheet feeding.Injection molding machine
The continuous roll-feed thermoforming machine (Fig. 11) is quite popular. It can produce high-quality products at a high speed and is supplied in accordance with the molding specifications. The most popular specifications are 60×60, 90×90, and 125×106 cm. Such thermoforming machines are often designed with a furnace that is 3 to 4 times the length of the longest mold. Most of the furnaces are electrically heated and mounted on a rack that can be removed from the sheet conveying system. The oven has two main forms of C-frame and drop gate. Thermoforming systems are often driven hydraulically or mechanically. Monolithic feeding thermoforming machines can be divided into rotary type and shuttle type (Fig. 12). Rotary thermoforming machines are often used for the production of large numbers of products. Common three-station standard thermoforming machine, the station rotation is 120 °; there are also four-station thermoforming machine, which increases a heating station. The shuttle thermoforming machine has a forming station on which the sheets are clamped and then reciprocated over the furnace. It is also designed as a two-station thermoforming machine consisting of two molding stations and one oven. This kind of thermoforming machine has a wide processing adaptability.
The energy saving of plastic machinery can be divided into two parts: one is the power part and the other is the heating part.
Energy-saving part of the power: Most inverters are used. The energy-saving method is to save the remaining energy of the motor. For example, the actual power of the motor is 50Hz, and you actually only need 30Hz in production to produce enough. The extra energy consumption is in vain. Wasted, the frequency converter is to change the power output of the motor to save energy.