A controllable mold opening and closing mechanism for a thermoforming machine

Abstract

The invention provides a controllable die opening-closing mechanism for a thermoforming machine. The die opening-closing mechanism comprises a controller, a supporting device, a crank toggle rod die closing mechanism and an assistant power device, wherein the supporting device comprises a bottom plate, and a guide pillar which is vertically fixed on the bottom plate; the crank toggle rod die closing mechanism comprises a servo driving mechanism, an eccentric wheel, an intermediate rod, lower connecting rods, upper connecting rods and a movable die plate; the eccentric wheel is connected with the intermediate rod; the movable die plate is sleeved on the guide pillar; the upper connecting rods are connected with the movable die plate, and the lower connecting rods are connected with the bottom plate; the intermediate rod, the upper connecting rods and the lower connecting rods are integrally connected; and the assistant power device is fixed on the bottom plate, and an actuating end of the assistant power device is connected with the movable die plate. According to the controllable die opening-closing mechanism for the thermoforming machine, the assistant power device which can reduce inertia force is arranged; and the controller is used for controlling a motor and the assistant power device to provide power and damping for the movable die plate in a mutual coordination way, so that the high-speed movement of the die plate can be realized.

Description

technical field [0001] The invention relates to the field of mold opening and closing mechanisms, in particular to a controllable mold opening and closing mechanism for a thermoforming machine. Background technique [0002] The existing mold opening and closing mechanisms of thermoforming machines can be divided into three types according to their action modes: hydraulic type, hydraulic-mechanical type and electric-mechanical type. [0003] The hydraulic mold opening and closing mechanism relies on the pressure of the liquid to directly lock the mold. When the pressure of the liquid is released, the clamping force also disappears. The hydraulic mold opening and closing mechanism can be divided into single cylinder direct pressure type, liquid filling type, pressurized mold opening and closing mechanism according to the function of the hydraulic cylinder. The hydraulic mold opening and closing mechanism has a simple structure, which can achieve a large mold opening and closi...

AI Technical Summary

Problems solved by technology

However, the up and down movement of the worktable of the mold opening and closing mechanism needs to be realized by the positive and negative rotation of the servo motor. Due to the influence of inertial force and motor speed, the machine is difficult to run at high speed, and the ball screw is easy to wear, which affects the life of the machine.

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