Intelligent numerically-controlled pressure system for reciprocating extrusion and method of operating the same

An intelligent numerically-controlled pressure system for reciprocating extrusion, comprising:

• a mold clamping and temperature control unit;
• a displacement control unit;
• a base;
• a personal computer (PC);
• and
• a temperature-displacement sensing and control unit;
• wherein the displacement control unit comprises a sliding rod;
• the base is provided with a sliding groove;
• the sliding rod is arranged in the sliding groove;
• the sliding rod is provided with an electric lifting mechanism;
• and the electric lifting mechanism is fixedly provided with a mold control platform;
• the mold clamping and temperature control unit comprises two moving rods arranged opposite to each other;
• and each of the two moving rods is provided with an electric translation mechanism;
• the mold control platform is provided with a mounting groove;
• the two moving rods are arranged in the mounting groove;
• each of the two moving rods is further provided with a clamp for fixing a mold;
• and the clamp is provided with a temperature control mechanism and a pressure sensor;
• the temperature-displacement sensing and control unit is oriented toward the mold;
• the PC is communicatively connected to the mold clamping and temperature control unit, the displacement control unit, the mold control platform and the temperature-displacement sensing and control unit;
• and
• an autonomous leveling mechanism is provided in the mold control platform;
• and the autonomous leveling mechanism is communicatively connected to the displacement control unit;
• and
• the intelligent numerically-controlled pressure system is configured to be operated through steps of:
• (S1) setting a displacement parameter of the mold control platform in the PC;
• and raising or lowering, by the displacement control unit, the mold control platform to a predetermined height and subsequently moving the mold control platform forward according to the displacement parameter of the mold control platform, such that the mold control platform extends out of the base to a first designated position;
• (S2) placing the mold on an upper surface of the mold control platform;
• setting a mold clamping parameter in the PC;
• and raising or lowering, by the mold clamping and temperature control unit, the clamp to a second designated position according to a mold clamping position, and applying, by the clamp, a clamping force to the mold;
• (S3) setting a displacement parameter of the mold control platform in the PC;
• adjusting, by the displacement control unit, the mold control platform to a third designated position based on the displacement parameter of the mold control platform, such that a press head is aligned with the mold;
• and leveling the mold control platform through the autonomous leveling mechanism;
• (S4) measuring an extrusion reduction through the temperature-displacement sensing and control unit;
• feeding a measured extrusion reduction back to the PC;
• and setting, by the PC, a reference reduction according to the measured extrusion reduction;
• and
• (S5) setting an extrusion speed, an extrusion temperature and an extrusion pressure in the PC;
• and heating the mode to the extrusion temperature with the temperature control mechanism of the clamp;
• maintaining the mold at the set extrusion temperature under a constant power;
• and
• regulating a pressure during an extrusion process according to the extrusion pressure set in the PC followed by extrusion.