Optical lens die casting device

Abstract

The invention discloses an optical lens die casting device. The optical lens die casting device comprises a press, a die casting mold and a multi-station switching device; the die casting mold consists of an upper mold and multiple lower molds; the upper mold is connected to the lower end of a pressing head of the press; and the lower molds are respectively mounted on all stations of the multi-station switching device. The multi-station switching device includes a base and a mold bracket; the mold bracket is rotationally connected with the base through a center shaft, and is provided with multiple die casting stations, cooling stations and mold rising stations capable of being switched; the die casting stations, the cooling stations and the mold rising stations are respectively connected to the lower molds through rotating shafts; and the center shaft is connected with a servo motor through a transmission part. The device performs the die casting for optical lenses; and the lenses, molded through hot pressing, timely rotate away from the die casting stations to reach the cooling stations for naturally cooling to form better internal lattice structures, so that the better optical performance of the optical lenses can be guaranteed, the quality is greatly improved, the molding pressing time is largely shortened, and the production efficiency can be improved by 5-10 times.

Description

technical field [0001] The invention relates to the technical field of workpiece detection, in particular to an optical lens die-casting device. Background technique [0002] With the wide use of optical equipment and instruments in various fields of society, the demand for optical lenses is increasing rapidly. As the first process of optical lens processing, the die-casting of lens blanks mostly follows the traditional pressing method, namely Press one by one on the press with a forming die, although various automatic control measures have been adopted at present, there are still many problems and defects. Its main manifestations: 1) Most of the raw materials are cut first, heated to a molten state, and then transferred to the pressing mold for pressing. Not only is the cutting time-consuming and labor-intensive, but also the transfer is carried out manually with special clamps. , not easy to operate, slow transfer speed, low safety factor, resulting in low production effi...

AI Technical Summary

Problems solved by technology

Its main manifestations: 1) Most of the raw materials are cut first, heated to a molten state, and then transferred to the pressing mold for pressing. Not only is cutting time-consuming and labor-intensive, but also the transfer is carried out manually with special clamps. , not easy to operate, slow transfer speed, and low safety factor, resulting in low production efficiency and prone to personal injury accidents; 2) After the lens is pressed and formed, it needs to cool down with the mold before it can be molded, and it takes a long time to occupy the pressing station. In order to shorten the cooling time, the forced rapid cooling method of high-pressure air is often used at present. This cooling method has a great impact on the internal lattice structure of the lens, resulting in a decrease in the optical performance of the lens; 3) In the process of continuous pressing, the indenter and liquid The temperature of the piston rod of the cylinder rises, sometimes even close to the temperature of the molten billet, causing the piston rod to expand, the strength to decrease, deformation, locking, etc., which affect the service life of the liquid cylinder, high failure rate, and also affect the production efficiency of die casting due to frequent maintenance

Problems such as the above have not yet been satisfactorily resolved

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