Opening and Closing Mechanism of Integral Core Shooting Box Mold for Central Guide Frame of Railway Vehicle Side Frame

Abstract

The invention relates to a mold opening and closing mechanism for an integral core shooting box mold of a middle guide frame of a railway vehicle side frame. The mold opening and closing mechanism comprises an upper core box, a lower core box, a front loose core, a rear loose core, a left loose core and a right loose core, and is characterized in that transmission mechanisms are arranged between the front loose core and the left loose core and between the rear loose core and the right loose core; and each transmission mechanism comprises a transmission screw rod, a slider, gears and gear racks, the transmission screw rod is transversely supported in the lower core box and can rotate around the axis of the transmission screw rod, the slider is in threaded connection with the transmission screw rod and fixed at the bottom of the left loose core, the gears are mounted on the transmission screw rod, and the gear racks are longitudinally arranged, fixedly connected with the front loose core and in transmission mesh with the gears. The mold opening and closing mechanism for the integral core shooting box mold of the middle guide frame of the railway vehicle side frame can realize mold opening and closing in four directions and has the advantages of simple and reasonable structure, better consistency of the mold opening and closing in each direction and low manufacturing cost.

Description

technical field [0001] The invention relates to a mechanical automatic mold opening and closing mechanism for large and medium-sized integral core-shooting box moulds, in particular to a mold opening and closing mechanism for an integral core-shooting box mold in the center guide frame of a side frame of a railway vehicle. Background technique [0002] Existing products that use core box molds to make cores all have complex shapes and multi-hole structures. Core box molds, especially those involving the central guide frame of the side frame of railway vehicles, include integral core box molds including sand shooting boards and upper core boxes. , Lower core box, front and rear core pulling, left and right core pulling, left and right cylinder mounting frames and other mechanisms. Such a core box mold is disclosed in the Chinese utility model patent "a kind of integral core box mold for the central pedestal frame of the side frame of a railway vehicle" whose patent number is ...

AI Technical Summary

Problems solved by technology

Existing core-shooting box mold equipment has fewer options for core-pulling directions. Generally, it can only provide core-pulling in the front and rear directions at the same time, and cannot provide core-pulling force in the left-right direction. If core-pulling in other (left-right) directions requires Additional installation of oil cylinder to assist core pulling

[0003] The use of oil cylinders to achieve core pulling in other (left and right) directions has the following defects: 1. The oil cylinder is expensive, and it is necessary to connect and install the device in the mold design, such as increasing the oil cylinder installation frame, increasing the design difficulty of the mold, increasing the design cost, and increasing The weight of the mold will waste the mold manufacturing materials; 2. Due to the structural problems of the oil cylinder, the oil cylinder is often out of sync during the mold opening process during use, resulting in damage to the mold, oil leakage from the oil cylinder reduces the core pulling force provided by the oil cylinder, As a result, the core-pulling mechanism cannot be pulled out smoothly, thus wasting time; 3. The core-pulling force provided by the cylinder is not easy to be consistent, resulting in inconsistent core-pulling speed. 4. Long-term use of the oil cylinder will lead to poor sealing of the oil cylinder, resulting in oil leakage, and oil pollution entering the sand shooting machine, thus affecting the overall quality of the sand core; 5. It is inconvenient to disassemble and replace the auxiliary oil cylinder device; 6. The auxiliary oil cylinder will be greatly affected. Environmental reasons lead to decreased accuracy, insensitive operation and waste of time

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