Medium frequency induction heating device for glass molds

Abstract

A medium frequency induction heating device for glass molds belongs to the technical field of an auxiliary facility for manufacturing of glass molds. The medium frequency induction heating device for glass molds comprises a rack, a medium frequency induction heating box, a pair of guide rails, a mold load-bearing wheelbarrow and a lampblack collecting box. The medium frequency induction heating box is arranged on the upper part of the rack; a squirrel-cage type coil framework is arranged inside a heating hearth of the medium frequency induction heating box; electromagnetic coils are arranged on the outer wall of the squirrel-cage type coil framework; left ends of the guide rails extend into the heating hearth and right ends of the guide rails are fixed to the rack; the mold load-bearing wheelbarrow is movably arranged on the pair of guide rails; the left side of the lampblack collecting box corresponding to the medium frequency induction heating box is fixed to the rack and the lampblack collecting box is communicated with the heating hearth; and a lampblack discharge opening of the lampblack collecting box is connected to a lampblack purification device. The invention has effects as follows: as the structure is remarkably simplified, the device is convenient to manufacture and operate; time of auxiliary movement can be saved so as to raise preheating efficiency of molds; the mold load-bearing wheelbarrow can meet the requirement of transverse horizontal arrangement of molds so as to guarantee safety; and the lampblack collecting box can drive lampblack generated during the preheating process of molds away from a workplace so as to guarantee a clean environment and workers' health.

Description

technical field [0001] The invention belongs to the technical field of auxiliary facilities for manufacturing glass molds, and in particular relates to a medium-frequency induction heating device for glass molds. Background technique [0002] The aforementioned intermediate frequency induction heating heats molds made of magnetically permeable materials such as carbon steel (also known as mold steel in the industry), copper alloys, and stainless steel in the form of heat generated by electromagnetic eddy currents. As is well known in the mold manufacturing industry, since the glass mold is in service, that is, the mold cavity is in direct contact with the molten glass melt frequently during use, it is subject to chemical erosion and wear of the glass melt and is subjected to alternating cold and heat ( Alternating) stress, at the same time, due to the long-term high temperature environment of about 500-800 ° C, the mold cavity of the glass mold will appear such as fatigue da...

AI Technical Summary

Problems solved by technology

Since the welding torch preheats the mold by means of combustion gas combustion, it is difficult to control, and it is difficult to obtain a uniform temperature for the mold, which affects the quality of spray welding; because the electric furnace heating takes a long time on the one hand, and on the other hand is not enough to ensure that the mold Obtain a uniform temperature, which also affects the spray welding quality and wastes energy due to lengthy heating times

[0006] Using medium frequency induction heating to heat the mold before spray welding can eliminate the disadvantages of the aforementioned welding torch preheating and electric furnace preheating, and various corresponding technical revelations can be seen in the published Chinese patent documents, such as the typical invention patent authorization announcement number CN102875009B The recommended "medium frequency induction heating device for glass molds", this patent solution truthfully makes up for the defects of the utility model patent CN201039510Y (mold heating device) and can objectively fulfill the technical effects summarized in the technical effect column of its manual, but there are still The following shortcomings: one, due to the need to be equipped with a medium-frequency induction heating box lifting mechanism and a water circulation cooling mechanism, etc., the structure is more complicated; second, because whenever the preheating of the mold is completed, the medium-frequency induction heating box lifting mechanism needs to be used. The medium frequency induction heating box goes up, and the medium frequency induction heating box makes the coil retreat from the preheated mold, and after the preheated mold is replaced, the medium frequency induction heating box needs to go down, so the time consumed by these auxiliary actions It is relatively long, which affects the preheating efficiency of the mold; thirdly, due to structural design reasons, it is determined that the mold must be placed in a vertical state, so whether the operator picks and places the mold or the coil of the medium frequency induction heating box is in the opposite position In the process of mold preheating, there is a danger of the mold falling down and causing safety hazards; Fourth, due to the need for lubrication, the surface of the mold is covered with lubricating oil during the various processing steps before the mold is sprayed from the blank to the cavity , and because the preheating is carried out in the open state, when the mold is transferred to the preheating station and a large amount of harmful oily fume will be generated during the preheating process, on the one hand, it will affect the working environment of the preheating place, On the other hand, it affects the health of online workers

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