Thermal forming equipment achieving servo control over furnace doors

Abstract

The invention discloses thermal forming equipment achieving servo control over furnace doors. The thermal forming equipment comprises a rack, the furnace doors, furnace door drive devices and heatingplates. The furnace doors are movably arranged on the rack through the furnace door drive devices, and the furnace doors and the heating plates are closed in to form a heating cavity. The thermal forming equipment is characterized in that the furnace door drive devices comprise controllers, torque sensors, motors, lead screws and nuts; motor shafts of the motors are connected with the lead screws;the lead screws are located on the rack in the axial direction; the nuts are in threaded connection to the lead screws and are connected with the furnace doors; the lead screws rotate to drive the furnace doors to do translation so as to control opening and closing of the heating cavity; the torque sensors detect the torque of the motor shafts; the torque sensors and the controllers are electrically connected; and the controllers and the motors are electrically connected. The furnace doors move on the rack, and therefore opening and closing of the heating cavity are controlled. The lead screws are driven by the motors to rotate, lead screw rotation is converted into linear motion of the nuts, and therefore the furnace doors are driven to do translation.

Description

【Technical field】 [0001] The invention relates to thermoforming equipment, which belongs to the field of thermoforming. 【Background technique】 [0002] The heating chamber of the thermoforming equipment is composed of a furnace door and a heating system. The movement of the furnace door realizes the opening and closing of the heating chamber, so that the molded parts can be taken and placed in the heating chamber. At present, the movement of the furnace door is mainly driven by air cylinders or oil cylinders. Air cylinders and oil cylinders are not sensitive to position pressure. They can only keep the furnace door in two positions: crushed and fully opened, and it is difficult to stop between the two positions. When the furnace door is fully opened, the heat loss in the heating chamber is very large, which also affects the molding quality of the parts. The inner side of the furnace door is heat insulation cotton. When the furnace door is crushed, the pressure is too large,...

AI Technical Summary

Problems solved by technology

At present, the movement of the furnace door is mainly driven by air cylinders or oil cylinders. The air cylinders and oil cylinders are not sensitive to position pressure, so the furnace door can only stay in two positions: crushed and fully opened, and it is difficult to stop between the two positions.

When the furnace door is fully opened, the heat loss in the heating chamber is large, which also affects the molding quality of parts

The inner side of the furnace door is heat insulation cotton. When the furnace door is crushed, the pressure is too large, which may easily cause damage to the heat insulation cotton. The heat loss in the heating chamber will reduce the quality of thermoforming, and the replacement of heat insulation cotton is very cumbersome and will increase maintenance costs

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