Integrating device capable of controlling wall thickness of bottle blowing machine with crank connecting rod mechanism driven by motor

Abstract

The invention relates to a plastic extruding and blowing wall thickness control device, in particular to an integrating device capable of controlling the wall thickness of a bottle blowing machine with a crank connecting rod mechanism driven by a motor. The integrating device comprises a machine frame, wherein a plurality of extruding mold heads for extruding bottle blowing molds are fixed to thebottom of the machine frame; an extruding mold head core rod is arranged in each extruding mold head in a cooperating manner; a servo motor and a crank connecting rod mechanical device are mounted atthe top of the machine frame; the servo motor is connected with a core rod moving mold plate through the crank connecting rod mechanical device, and is used for driving the core rod moving mold plateto move up and down; and the upper ends of the extruding mold head core rods are connected with and fixed to the core rod moving mold plate. The integrating device disclosed by the invention is simplein structure, high in precision of a control device, energy-saving and environmentally-friendly; the motion of the crank connecting rod mechanical device is combined with the motion of the servo motor, so that under the motion requirements of being short in stroke and heavy in load, the integral structure is stable and reliable, and the service life is greatly prolonged; and besides, the curve control is performed by a digital cam which is in servo driving, so that the precision of wall thickness of products is notably improved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a plastic extrusion blowing wall thickness control device, in particular to an integrated device for controlling the wall thickness of a bottle blowing machine driven by a motor. Background technique [0002] Hollow plastic products are made by blow molding, because the product strength requirements stipulate the minimum wall thickness. In order to save materials, it is necessary to meet the minimum wall thickness requirements at the largest and smallest positions of the product, and at the same time, it is necessary to avoid material waste. Therefore, the blow molding machine with wall thickness control is commonly used, and the wall thickness control cylinder is commonly controlled by a proportional electro-hydraulic valve. The piston rod of the cylinder is connected to the extrusion blowing die head of the blow molding machine, and the oil cylinder realizes the positioning of the opening of the extrusion die head. Control th...

AI Technical Summary

Problems solved by technology

However, in the process of controlling the wall thickness of the transmission device with screw structure, the motion stroke of extrusion blowing control is short, the force is large, and the lubrication of the screw nut drive pair is insufficient, which greatly reduces the operating life of the screw mechanism under such motion conditions. Or the accuracy of the screw is greatly reduced, which will eventually affect the effect of wall thickness control and the long-term use of users

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